Note: Descriptions are shown in the official language in which they were submitted.
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GAS COMPRESSION SYSTEM
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to and the benefit of
Chinese Patent Application No.
202110744471.3, filed on July 01, 2021, and Belgian Patent Application NO. BE
2022/5335,
filed on May 04, 2022, the entire disclosures of which are incorporated herein
by their
references.
TECHNICAL FIELD
[0002] The present disclosure relates to the field of gas
compression technologies, and more
particularly, to an air compression system.
BACKGROUND
[0003] Advantages of two-stage screw-type variable frequency air
compressors, with the
wide application thereof, are gradually recognized by users. Due to the
variable flow design, a
diameter of a pipeline for receiving oil returned from an oil-gas separation
cartridge is often
designed based on a maximum oil return amount. In some cases, in order to
prevent the oil
return pipeline from being clogged, the diameter of the pipeline is
intentionally designed to be
relatively large. In this way, during the oil return, the oil-gas separation
cartridge is in direct
communication with compressed gas in an oil-gas separation vessel and a gas
inlet end of a
compressor head for a period of time, which results in an introduction of high-
temperature and
high-pressure gas into the gas inlet end of the compressor head, thereby
negatively affecting
suction efficiency and performance of the compressor head. The advantages in
terms of energy-
saving of the two-stage compression is mainly attributed to an inter-stage
cooling. At present,
the inter-stage cooling for two-stage compression available on the market is
generally designed
in such a manner that the oil-gas separation vessel is adopted to return oil
for oil-injecting
cooling. Due to the influences caused by an oil-injecting pressure and a size
of a nozzle for oil-
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injecting, an atomization effect of the oil-injecting is unsatisfactory,
resulting in insufficient
inter-stage cooling, thereby increasing the overall power consumption Thus,
the design thereof
is required to be improved.
SUMMARY
[0004] The present disclosure aims to solve at least one of the technical
problems in the
prior art. In this regard, an objective of the present disclosure is to
provide a gas compression
system, capable of preventing high-temperature and high-pressure gas which
come from the
separator vessel entering the inlet end of a compressor head, thereby ensuring
suction efficiency
of the compressor head, and by mixing with compressor oil introduced into an
inter-stage
cooling chamber, the atomization effect of the compressor oil sprayed by the
sprayer is
improved, thereby improving a cooling effect of an inter-stage stage.
[0005] The gas compression system according to embodiments of the
present disclosure
includes: a first-stage compressor head and a second-stage compressor head; an
oil-gas
separation vessel in communication with the second-stage compressor head and
the first-stage
compressor head; and a sprayer disposed between the first-stage compressor
head and the
second-stage compressor head and configured to cool inter-stage compressed
gas. The sprayer
includes: a gas inlet configured to access compressed gas; an oil inlet
configured to access
compressor oil; and at least one oil-spraying opening configured to oil-spray
cools the inter-
stage compressed gas.
[0006] With the gas compression system according to the embodiments of the
present
disclosure, a mixture containing oil and gas can be sprayed by a sprayer into
the inter-stage
compressed gas between the first-stage compressor head and the second-stage
compressor head.
Accordingly, an atomization effect of oil sprayed at an inter-stage stage is
improved by
employing a characteristic of the compressed air-containing secondary oil
return from the oil-
gas separation cartridge, thereby promoting an inter-stage heat exchange
efficiency, and further,
improving performance of the whole system.
[0007] In the gas compression system according to some embodiments
of the present
disclosure, the first-stage compressor head and the second-stage compressor
head are formed
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as one piece, and the sprayer is disposed at an inter-stage stage between the
first-stage
compressor head and the second-stage compressor head
[0008] The gas compression system according to some embodiments of
the present
disclosure further includes an inter-stage cooling chamber disposed between
the first-stage
compressor head and the second-stage compressor head, and the sprayer is
disposed in the inter-
stage cooling chamber.
[0009] In the gas compression system according to some embodiments
of the present
disclosure, the oil inlet of the sprayer is connected to the oil-gas
separation vessel
[0010] The gas compression system according to some embodiments of
the present
disclosure further includes an oil-gas separation cartridge disposed in the
oil-gas separation
vessel, and the gas inlet of the sprayer is connected to the oil-gas
separation cartridge through
a pipe.
[0011] In the gas compression system according to some embodiments
of the present
disclosure, the gas inlet of the sprayer can be connected to gas exhaust end
of the second-stage
compressor head.
[0012] In the gas compression system according to some embodiments
of the present
disclosure, the gas inlet of the sprayer can be connected to outlet end of the
oil-gas separation
vessel.
[0013] In the gas compression system according to some embodiments
of the present
disclosure, the sprayer includes an inner pipe having a hollow inner chamber,
and an outer pipe
sleeved on the inner pipe; and an outer chamber is defined by the outer pipe
and the inner pipe,
and the inner chamber is connected to the outer chamber.
[0014] In the gas compression system according to some embodiments
of the present
disclosure, the oil inlet is connected to the outer chamber, the gas inlet is
connected to the inner
chamber, and the oil-spraying opening is defined in an outer peripheral wall
of the outer pipe.
[0015] In the gas compression system according to some embodiments
of the present
disclosure, the gas inlet is disposed at a first end of the outer pipe and
penetrates a first end of
the inner pipe, and a second end of the inner pipe is located within the outer
pipe.
[0016] In the gas compression system according to some embodiments
of the present
disclosure, the second end of the inner pipe has at least one oil passage hole
defined therein and
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configured to communicate the inner chamber with the outer chamber.
[0017] In the gas compression system according to some embodiments
of the present
disclosure, the at least one oil passage hole includes a plurality of oil
passage holes, and the
plurality of oil passage holes are circumferentially and/or axially
distributed along an outer
peripheral wall of the inner pipe.
[0018] In the gas compression system according to some embodiments
of the present
disclosure, the oil inlet is disposed on the outer peripheral wall of the
outer pipe
[0019] In the gas compression system according to some embodiments
of the present
disclosure, the oil-spraying opening is defined in the outer pipe and spaced
apart from the oil
inlet.
[0020] In the gas compression system according to some embodiments
of the present
disclosure, the at least one oil-spraying opening includes a plurality of oil-
spraying openings,
and the plurality of oil-spraying openings are circumferentially and/or
axially distributed along
the outer peripheral wall of the outer pipe.
[0021] In the gas compression system according to some embodiments of the
present
disclosure, the oil-gas separation vessel is connected to the inter-stage
through a scavenge line.
[0022] In the gas compression system according to some embodiments
of the present
disclosure, the oil-gas separation vessel can be connected to the second-stage
compressor inlet
through a scavenge line.
[0023] The gas compression system according to some embodiments of the
present
disclosure further includes an oil cooler and a filter, which are sequentially
connected between
the oil-gas separation vessel and the first-stage compressor head.
[0024] The gas compression system according to some embodiments of
the present
disclosure further includes a gas cooler, and a gas exhaust end of the oil-gas
separation vessel
is in communication with the gas cooler.
[0025] In the gas compression system according to some embodiments
of the present
disclosure, the gas inlet of the sprayer can be from gas exhaust end of the
gas cooler.
[0026] Additional aspects and advantages of the present disclosure
will be given at least in
part in the following description, or become apparent at least in part from
the following
description, or can be learned from practicing of the present disclosure.
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BRIEF DESCRIPTION OF DRAWINGS
[0027] The above and/or additional aspects and advantages of the
present disclosure will
become more apparent and more understandable from the following description of
embodiments in conjunction with the accompanying drawings, in which:
[0028] FIG. 1 is a schematic diagram of a gas compression system according
to an
embodiment of the present disclosure (in which an inter-stage cooling chamber
is included);
[0029] FIG. 2 is a perspective view of a sprayer of a gas
compression system according to
an embodiment of the present disclosure;
[0030] FIG. 3 is a schematic structural diagram of a sprayer of a
gas compression system
according to an embodiment of the present disclosure;
[0031] FIG. 4 is a cross-sectional view of a portion A-A in FIG. 3;
[0032] FIG. 5 is a schematic structural diagram of a gas
compression system according to
an embodiment of the present disclosure (illustrating a direct spray into an
inter-stage stage);
[0033] FIG. 6 is a schematic structural diagram of a gas
compression system according to
an embodiment of the present disclosure (in which compressed air is introduced
from a gas
exhaust end of a gas cooler);
[0034] FIG. 7 is a schematic structural diagram of a gas
compression system according to
an embodiment of the present disclosure (in which compressed air is introduced
from a gas
exhaust end of an oil-gas separation vessel);
[0035] FIG. 8 is a schematic structural diagram of a gas compression system
according to
an embodiment of the present disclosure (in which compressed air is introduced
from an oil-
gas separation cartridge);
[0036] FIG. 9 is a schematic structural diagram of a gas
compression system according to
an embodiment of the present disclosure (one-piece structure); and
[0037] FIG. 10 is a schematic structural diagram of a gas compression
system according to
an embodiment of the present disclosure (in which compressed air is introduced
from a second-
stage compressor head).
[0038] Reference numerals in the accompanying drawings:
gas compression system 100,
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first-stage compressor head 1, second-stage compressor head 2, inter-stage
cooling
chamber 3,
oil-gas separation vessel 4, oil-gas separation cartridge 5, gas cooler 6,
scavenge line 7,
first oil return pipeline 81, second oil return pipeline 82, third oil return
pipeline 83,
sprayer 9, inner pipe 91, inner chamber 911, outer pipe 92, outer chamber 921,
oil inlet 93,
gas inlet 94, oil-spraying opening 95, oil passage hole 96, oil cooler 10,
filter 11.
DESCRIPTION OF EMBODIMENTS
[0039]
The embodiments of the present disclosure will be described in detail
below with
reference to examples thereof as illustrated in the accompanying drawings,
throughout which
same or similar elements, or elements having same or similar functions, are
denoted by same
or similar reference numerals. The embodiments described below with reference
to the
drawings are illustrative only, and are intended to explain, rather than
limiting, the present
disclosure.
[0040]
A gas compression system 100 according to embodiments of the present
disclosure
will be described below with reference to FIG. 1 to FIG. 10. A sprayer 9 is
arranged between a
first-stage compressor head 1 and a second-stage compressor head 2 of the gas
compression
system 100, and the sprayer 9 can spray compressor oil accompanied with
compressed gas into
inter-stage compressed gas between the first-stage compressor head 1 and the
second-stage
compressor head 2, which is beneficial to improve a cooling effect of the
inter-stage compressed
gas, enhancing an atomization effect of oil sprayed at an inter-stage stage,
and ensuring cooling
at the inter-stage stage between the compressor heads, thereby improving
performance of the
whole machine.
[0041]
As illustrated in FIG. 5, the gas compression system 100 according to
the
embodiments of the present disclosure includes the first-stage compressor head
1, the second-
stage compressor head 2, an oil-gas separation vessel 4, and the sprayer 9.
[0042]
As illustrated in FIG. 5, the first-stage compressor head 1 and the
second-stage
compressor head 2 are connected in series in sequence. It should be noted that
the first-stage
compressor head 1 is provided with a suction port configured to suck and
compress external
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gas. Both the first-stage compressor head 1 and the second-stage compressor
head 2 are
configured to compress gas, to increase a temperature and a pressure of the
gas, thereby
outputting high-pressure compressed gas. That is, in the present disclosure,
the first-stage
compressor head 1 is a low-pressure compressor head, and the second-stage
compressor head
2 is a high-pressure compressor head.
[0043] As illustrated in FIG. 5, the oil-gas separation vessel 4 is
in communication with the
second-stage compressor head 2 and the first-stage compressor head 1.
Specifically, a gas
exhaust end of the second-stage compressor head 2 is in communication with a
gas inlet end of
the oil-gas separation vessel 4, and an oil supply port of the oil-gas
separation vessel 4 is in
communication with a compression chamber of the first-stage compressor head 1
and a
compression chamber of the second-stage compressor head 2. In this way,
compressor oil
flowing out of the oil-gas separation vessel 4 can flow into the first-stage
compressor head 1
and the second-stage compressor head 2, so as to lubricate and cool the first-
stage compressor
head 1 and the second-stage compressor head 2. It should be noted that,
through an arrangement
of this portion, the external gas, after being compressed by the first-stage
compressor head 1
and further compressed by the second-stage compressor head 2, can enter the
oil-gas separation
vessel 4. The oil-gas separation vessel 4 can roughly separate the compressed
gas that has
undergone two times of compression. As a result, most of the separated
compressor oil may
sink to a bottom of the oil-gas separation vessel 4, and enter, via the oil
supply port located at
the bottom of the oil-gas separation vessel 4, the compression chamber of the
first-stage
compressor head 1 and the second-stage compressor head 2 to perform cyclic
lubrication.
[0044] The sprayer 9 is arranged between the first-stage compressor
head 1 and the second-
stage compressor head 2, and configured to cool the inter-stage compressed gas
between the
first-stage compressor head 1 and the second-stage compressor head 2. The
sprayer 9 includes
a gas inlet 94 and an oil inlet 93. The gas inlet 94 is configured to be
connected to an output
end of the high-pressure gas to introduce the compressed gas into the sprayer
9, and the oil inlet
93 is configured to be connected to an output end of the compressor oil to
introduce the
compressor oil into the sprayer 9. The sprayer 9 further includes an oil-
spraying opening 95
configured to spray, towards the inter-stage compressed gas, the compressed
gas introduced at
the gas inlet 94 and the compressor oil introduced at the oil inlet 93, such
that the inter-stage
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compressed gas is cooled by oil-spraying. Therefore, the compressor oil
accompanied with the
compressed gas can join the inter-stage compressed gas, thereby exerting a
spraying effect on
the inter-stage compressed gas. The compressed gas in oil droplets may expand
rapidly,
resulting in a blasting effect on the oil droplets. In this manner,
granularity of the sprayed oil is
greatly refined, and a total heat exchange area of the oil droplets is
enlarged, and thus, energy
efficiency of the compressors can be optimized to achieve energy saving.
[0045] At least one oil-spraying opening 95 is provided. For
example, one oil-spraying
opening 95, or two or more oil-spraying openings 95 may be provided to enable
the sprayer 9
to spray towards the inter-stage compressed gas from different angles and
different positions,
which is beneficial to optimize a spraying effect.
[0046] In the gas compression system 100 according to the
embodiments of the present
disclosure, the oil-spraying opening 95 is disposed towards the inter-stage
compressed gas
between the first-stage compressor head 1 and the second-stage compressor head
2 to introduce
the compressor oil accompanied with the compressed gas into the inter-stage
compressed gas,
which is beneficial to improve the cooling effect of the inter-stage
compressed gas, enhancing
the atomization effect of oil sprayed at the inter-stage stage, and ensuring
the suction efficiency
and performance of the compressor heads, thereby improving performance of the
whole
machine.
[0047] In some embodiments, as illustrated in FIG. 9, the first-
stage compressor head 1 and
the second-stage compressor head 2 are formed as one piece, and the sprayer 9
is arranged at
the inter-stage stage between the first-stage compressor head 1 and the second-
stage compressor
head 2. In this case, the first-stage compressor head 1, the sprayer 9, and
the second-stage
compressor head 2 can be integrated into an integral structure to reduce an
overall structure size
of the gas compression system 100, thereby improving an integration level of
the gas
compression system 100, and reducing an actually-occupied mounting space.
[0048] In some embodiments, as illustrated in FIG. 1 and FIG. 6 to
FIG. 9, an inter-stage
cooling chamber 3 is further included. The inter-stage cooling chamber 3 is
arranged between
the first-stage compressor head 1 and the second-stage compressor head 2. That
is, the first-
stage compressor head 1, the inter-stage cooling chamber 3, and the second-
stage compressor
head 2 are connected in sequence, and the sprayer 9 is arranged on the inter-
stage cooling
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chamber 3. The inter-stage cooling chamber 3 is configured to cool the gas
compressed by the
first-stage compressor head 1. It can be understood that, after the gas is
compressed by the first-
stage compressor head 1, the temperature of the compressed gas may gradually
increase.
However, in the present disclosure, this part of gas is cooled in the inter-
stage cooling chamber
3, which is beneficial to lower the power consumption required for the
compression of the
second-stage compressor head 2, thereby reducing the overall energy
consumption of the gas
compression system 100 and reducing compression costs.
[0049] In this manner, the compressed gas introduced at the gas
inlet 94 and the compressor
oil introduced at the oil inlet 93, after being mixed with each other, are
sprayed from the oil-
spraying opening 95 towards the inter-stage cooling chamber 3, so as to oil-
spray cool the gas
in the inter-stage cooling chamber 3. As a result, the spraying effect is
exerted on the inter-stage
compressed gas in the inter-stage cooling chamber 3. The compressed gas in the
oil droplets
may expand rapidly, resulting in the blasting effect on the oil droplets. In
this manner, the
granularity of the sprayed oil is refined, and the total heat exchange area of
the oil droplets is
enlarged, and thus, the energy efficiency of the compressors can be optimized
to achieve energy
saving.
100501 In some embodiments, as illustrated in FIG. 1 and FIG. 6 to
FIG. 9, the oil inlet 93
of the oil sprayer 9 is connected to the oil-gas separation vessel 4 through a
first oil return
pipeline 81. As illustrated in FIG. 1, the first oil return pipeline 81 is
connecting the oil-gas
separation vessel 4 and the oil sprayer 9 between the first-stage compressor
head 1 and the
second-stage compressor head 2. That is, the first oil return pipeline 81 is
configured to be in
communication with an outlet end of the oil-gas separation vessel 4 to enable
the compressor
oil flowing out of the outlet end of the oil-gas separation vessel 4 to enter,
through the first oil
return pipeline 81, the oil sprayer 9 for mixing with the high-pressure gas.
[0051] In some embodiments, an oil-gas separation cartridge 5 is further
included and
disposed in the oil-gas separation vessel 4. As illustrated in FIG. 1, FIG. 8,
and FIG. 9, the gas
inlet 94 of the sprayer 9 is in communication with the oil-gas separation
cartridge 5 through the
scavenge 1ine7. It should be noted that the remaining portion of the
compressor oil after being
roughly separated by the oil-gas separation vessel 4 enters, accompanied with
the compressed
gas, the oil-gas separation cartridge 5 for further separation. In this
manner, the compressed gas,
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which is further separated by the oil-gas separation cartridge 5, is
discharged from the outlet
end of the oil-gas separation cartridge 5 for subsequent use. In addition, as
illustrated in FIG. 6
and FIG. 7, separated oil at the bottom of oil-gas separation cartridge 5 can
be returned, through
scavenge line 7, connect to the oil sprayer 9 air inlet.
[0052] In this manner, the gas that is further separated by the oil-gas
separation cartridge 5
can flow to the gas inlet 94 of the sprayer 9 through the scavenge line 7. For
example, this
portion of gas can be mixed with the compressor oil in the sprayer 9 and then
sprayed into the
inter-stage cooling chamber 3 to cool the compressed gas, which is compressed
by the first-
stage compressor head 1. It can be understood that, with the above
arrangement, the compressor
oil, which flows into the inter-stage chamber from the oil supply port of the
oil-gas separation
vessel 4, has relative high pressure, the gas which come from the scavenge
line 7, when also
entering the oil sprayer 9 , normally the gas from the scavenge line pressure
is higher than the
oil pressure from oil-gas separation vessel 4 by 1-3bar, which makes the
compressor oil with a
lot air bubbles inside, it will enhance the spraying effect which take place
in the inter-stage
cooling chamber 3. The compressed gas in the oil droplets may expand rapidly,
resulting in the
blasting effect on the oil droplets. In this manner, the granularity of the
sprayed oil is refined,
and the total heat exchange area of the oil droplets is enlarged, and thus,
the cooling effect is
enhanced. So, the compression process can be improved to achieve energy
saving.
[0053] It should be noted that, in some embodiments, as illustrated
in FIG. 1, the oil inlet
93 of the sprayer 9 is in communication with the oil-gas separation vessel 4
through the first oil
return pipeline 81, and the gas inlet 94 of the sprayer 9 is in communication
with the oil-gas
separation cartridge 5 through the scavenge line 7. The first oil return
pipeline 81 and the
scavenge line 7 are two separate pipelines, and the outlet end of the first
oil return pipeline 81
and the outlet end of the scavenge line 7 are both in communication with an
inside of the sprayer
9. Therefore, after the compressor oil in the oil-gas separation vessel 4
flows out from the outlet
end of the oil-gas separation vessel 4, the compressor oil enters the sprayer
9 through the first
oil return pipeline 81. At the same time, the high-pressure gas at the oil-gas
separation vessel 5
enters the sprayer 9 through the scavenge line 7, and thus the inter-stage
compressed gas is
cooled by the compressor oil accompanied with the compressed gas, thereby
improving the
cooling effect of the inter-stage cooling chamber 3, optimizing the energy
efficiency of the
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compressor, and saving energy.
[0054] In some embodiments, as illustrated in FIG. 10, the gas
inlet 94 of the sprayer 9 is
in communication with the gas exhaust end of the second-stage compressor head
2. That is, the
gas inlet 94 of the sprayer 9 can be in communication with the gas exhaust end
of the second-
stage compressor head 2 to allow the gas discharged from the second-stage
compressor head 2
to enter the gas inlet 94 of the sprayer 9, so as to supplement the compressed
gas to the sprayer
9. As a result, the compressed gas exerts the blasting effect on the oil
droplets of the compressor
oil entering the sprayer 9, granularity of the compressor oil is refined, and
a total heat exchange
area of the oil droplets is enlarged. Therefore, the oil droplets can be in a
sufficient contact with
the gas in the inter-stage cooling chamber 3, which improves the cooling
effect of the inter-
stage cooling chamber 3, thereby optimizing the energy efficiency of the
compressor, and
saving energy.
[0055] In some embodiments, as illustrated in FIG. 7, the gas inlet
94 of the sprayer 9 is in
communication with the gas outlet end of the oil-gas separation vessel 4, such
that the gas
discharged from the oil-gas separation vessel 4 can enter the gas inlet 94 of
the sprayer 9 for
supplementing the compressed gas to the sprayer 9. Therefore, the compressed
gas can exert
the blasting effect on the oil droplets of the compressor oil entering the
sprayer 9, which
improves the cooling effect of the inter-stage compressed gas, thereby
optimizing the energy
efficiency of the compressor, and saving energy.
[0056] In some embodiments, as illustrated in FIG. 2, FIG. 3, and FIG. 4,
the sprayer 9 is
in communication with the scavenge line 7, the first oil return pipeline 81,
and the inter-stage
cooling chamber 3. In this manner, the compressed gas in the scavenge line 7
and the
compressor oil in the first oil return pipeline 81 can enter the inter-stage
cooling chamber 3
through the sprayer 9.
[0057] The sprayer 9 includes the oil inlet 93, the gas inlet 94, and the
oil-spraying opening
95. Both the oil inlet 93 and the gas inlet 94 are in communication with the
oil-spraying opening
95. In addition, the oil inlet 93 is in communication with the first oil
return pipeline 81, the gas
inlet 94 is in communication with the scavenge line 7, and the oil-spraying
opening 95 is
configured to spray oil into the inter-stage cooling chamber 3.
[0058] That is, the sprayer 9 in the present disclosure is in communication
with the first oil
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return pipeline 81 through the oil inlet 93 and in communication with the
scavenge line 7
through the gas inlet 94, such that the compressor oil in the first oil return
pipeline 81 and the
compressed gas in the scavenge line 7 can be converged and mixed in the
sprayer 9. In this way,
the compressor oil and the compressed gas can be fully mixed with each other
before they are
sprayed into the inter-stage cooling chamber 3 through the oil-spraying
opening 95 of the
sprayer 9, thereby enhancing the atomization effect of the spray, and
improving the heat
exchange effect of the inter-stage cooling chamber 3.
[0059] The oil inlet 93 and the gas inlet 94 can be provided at one
end of the sprayer 9, and
the oil-spraying opening 95 can be provided at the other end of the sprayer 9,
such that the
compressor oil and the compressed gas can travel sufficiently long distances
to achieve
sufficient mixing. Opening shapes of the oil inlet 93, the gas inlet 94, and
the oil-spraying
opening 95 can be flexibly designed in accordance with practical requirements.
The opening
shapes can be designed as circular shapes as illustrated in FIG. 2, or as
rectangular shapes.
[0060] In some embodiments, as illustrated in FIG. 2 and FIG. 4,
the sprayer 9 includes an
inner pipe 91 and an outer pipe 92 sleeved on the inner pipe 91. The inner
pipe 91 has a hollow
inner chamber 911 defined therein, and an outer chamber 921 is defined by the
outer pipe 92
and the inner pipe 91. The inner chamber 911 is in communication with the
outer chamber 921.
The oil inlet 93 is in communication with the outer chamber 921, the gas inlet
94 is in
communication with the inner chamber 911, and the oil-spraying opening 95 is
defined on an
outer peripheral wall of the outer pipe 92 and in communication with the outer
chamber 921.
[0061] That is, the sprayer 9 includes a two-layer pipe structure,
in which the inner chamber
911 of the inner pipe 91 is formed as a flow chamber for the compressor oil
accompanied with
the compressed gas in the scavenge line 7, and the outer chamber 921 between
the outer pipe
92 and the inner pipe 91 is formed as a flow chamber for the compressor oil in
the first oil return
pipeline 81. The compressor oil accompanied with the compressed gas in the
inner chamber
911 can flow into the outer chamber 921 to be mixed with the compressor oil in
the first oil
return pipeline 81, and the mixture can be sprayed into the inter-stage
cooling chamber 3
through the oil-spraying opening 95 defined in the outer peripheral wall of
the outer pipe 92,
thereby cooling the gas in the inter-stage cooling chamber 3.
[0062] In the present disclosure, by designing the way in which the outer
pipe 92 is sleeved
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on the inner pipe 91, the inner pipe 91 and the outer pipe 92 can share radial
and axial spaces
of the sprayer 9, without providing separate flow pipes for the compressor oil
and the
compressed gas. In this way, a structure size of the sprayer 9 and the
mounting space occupied
by the sprayer 9 can be reduced. In addition, the inner pipe 91 and the outer
pipe 92 can be
formed as one piece, which is beneficial to reduce processing costs.
[0063] In some embodiments, a first end of the inner pipe 91 is
connected to a first end of
the outer pipe 92, the gas inlet 94 is disposed at the first end of the outer
pipe 92 and penetrates
the first end of the inner pipe 91 to be in communication with the inner
chamber 911, and a
second end of the inner pipe 91 is located within the outer pipe 92 and spaced
apart from an
inner peripheral wall of the outer pipe 92.
[0064] As illustrated in FIG. 4, an upper end of the inner pipe 91
is connected to an upper
end of the outer pipe 92, and the gas inlet 94 is disposed at the upper end of
the outer pipe 92
and penetrates the upper end of the inner pipe 91 to be in communication with
the inner chamber
911. In this manner, the compressor oil accompanied with the compressed gas in
the scavenge
line 7 can pass through an end portion of the outer pipe 92 at the gas inlet
94 to enter the inner
chamber 911 of the inner pipe 91, and flow downwards along an axial direction
of the inner
pipe 91.
[0065] A lower end of the inner pipe 91 is located within the outer
pipe 92 and spaced apart
from the inner peripheral wall of the outer pipe 92. As illustrated in FIG. 4,
an outer peripheral
wall of the lower end of the inner pipe 91 is radially spaced from the inner
peripheral wall of
the outer pipe 92, and an end surface of the lower end of the inner pipe 91 is
axially spaced
apart from a lower wall surface of the outer chamber 921.
[0066] In some embodiments, at least one oil passage hole 96 is
defined in the second end
of the inner pipe 91, and configured to communicate the inner chamber 911 with
the outer
chamber 921. As illustrated in FIG. 4, the oil passage hole 96 is defined in
the lower end of the
inner pipe 91. In this manner, the compressor oil entering the inner chamber
911, which is
accompanied with the compressed gas, can flow towards the oil passage hole 96
from top to
bottom, and be radially sprayed outwards from the oil passage hole 96 into the
outer chamber
921. Thus, the compressor oil accompanied with the compressed gas can be mixed
with the
compressor oil in the outer chamber 921, and then the mixture can be sprayed
into the inter-
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stage cooling chamber 3 through the oil-spraying opening 95. It should be
noted that, in the
present disclosure, the above-mentioned upper and lower ends are described
with reference to
an upward-downward direction as illustrated in the figures, and they are not
intended to limit
the actual mounting positions or directions of the sprayer 9.
[0067] In some embodiments, a plurality of oil passage holes 96 are
provided, and the oil
passage holes 96 are circumferentially and/or axially distributed along an
outer peripheral wall
of the inner pipe 91. In other words, one, two, or more oil passage holes 96
may be provided.
The plurality of oil passage holes 96 may be defined in the outer peripheral
wall of the lower
end of the inner pipe 91, such that the plurality of oil passage holes 96 can
be simultaneously
used to introduce the compressed gas and the compressor oil in the inner pipe
91 into the outer
chamber 921, which increases a flow efficiency, and the mixing with the
compressor oil in the
outer chamber 921 can be performed at several positions, which improves a
mixing effect.
[0068] In order to enhance oil output efficiency, the plurality of
oil passage holes 96 may
be axially spaced apart from each other along the inner pipe 91,
circumferentially spaced apart
from each other along the inner pipe 91, or axially and circumferentially
arranged in rows and
columns. As illustrated in FIG. 4, the oil passage holes 96 are constructed as
circular holes. A
plurality of circular holes are axially spaced apart from each other along the
inner pipe 91, and
adjacent circular holes are spaced apart from each other at a uniform
distance, such that the
compressed gas in return oil from the oil-gas separation cartridge 5 can be
separated, through
the small holes, into a number of small air bubbles in the compressor oil.
[0069] In some embodiments, the oil inlet 93 is disposed on the
outer peripheral wall of the
outer pipe 92 to supply oil from the outer peripheral wall of the outer pipe
92 to the inside of
the outer pipe 92.
[0070] In some embodiments, both the oil inlet 93 and the oil-
spraying opening 95 are
disposed on the outer peripheral wall of the outer pipe 92 and spaced apart
from each other. The
oil inlet 93 is disposed on the outer peripheral wall of a first end of the
outer pipe 92, and the
oil-spraying opening 95 is disposed on the outer peripheral wall of a second
end of the outer
pipe 92. As illustrated in FIG. 2 and FIG. 3, the oil inlet 93 is disposed on
the outer peripheral
wall of the upper end of the outer pipe 92, and therein the oil inlet 93
penetrates and forms a
joint portion radially protruding outwards from the outer peripheral wall of
the outer pipe 92,
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for connecting to the first oil return pipeline 81, which is beneficial to
improve assembly
efficiency. In addition, the oil-spraying opening 95 is disposed the outer
peripheral wall of the
upper end of the outer pipe 92, and is formed as a through hole penetrating
the outer peripheral
wall of the upper end of the outer pipe 92 for achieving the communication
between an inside
and an outside of the outer peripheral wall of the outer pipe 92, which
facilitates spraying of
the compressor oil from the outer chamber 921 into the inter-stage cooling
chamber 3.
[0071] As illustrated in FIG. 2 and FIG. 4, at least one oil-
spraying opening 95 is provided,
and when two or more oil-spraying openings 95 are provided, the oil-spraying
openings 95 are
circumferentially and/or axially distributed along the outer peripheral wall
of the outer pipe 92.
That is, a plurality of oil-spraying openings 95 may be defined in the outer
peripheral wall of
the lower end of the outer pipe 92, and the plurality of oil-spraying openings
95 can
simultaneously spray the mixed gas and compressor oil from the outer pipe 92
into the inter-
stage cooling chamber 3, which increases the flow efficiency, and the outer
chamber 921 and
an inner chamber of the inter-stage cooling chamber 3 can be in communication
with each other
at a number of positions, which improves the spraying effect.
[0072] It should be noted that, in addition to the circular shapes
illustrated in FIG. 4, the oil
inlet 93 and the oil-spraying opening 95 can also be designed as openings of
other types, such
as mesh holes or small long slits.
[0073] In some embodiments, as illustrated in FIG. 1 and FIG. 6 to
FIG. 9, the oil-gas
separation vessel 4 and the first-stage compressor head 1 are in communication
with each other
through the second oil return pipeline 82, such that the compressor oil in the
oil-gas separation
vessel 4 can enter the first-stage compressor head 1 through the second oil
return pipeline 82
for lubricating the first-stage compressor head 1, thereby ensuring a stable
working state of the
first-stage compressor head 1.
[0074] In some embodiments, as illustrated in FIG. 1 and FIG. 6 to FIG. 9,
the oil-gas
separation vessel 4 and the second-stage compressor head 2 are in
communication with each
other through a third oil return pipeline 83, such that the compressor oil in
the oil-gas separation
vessel 4 can enter the second-stage compressor head 2 through the third oil
return pipeline 83
for lubricating the second-stage compressor head 2, thereby ensuring a stable
working state of
the second-stage compressor head 2.
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[0075] In some embodiments, the gas compression system 100 further
includes an oil cooler
and a filter 11. The oil cooler 10 and the filter 11 are sequentially
connected between the oil-
gas separation vessel 4 and the first-stage compressor head 1.
[0076] In this manner, the compressor oil in the oil-gas separation
vessel 4, after flowing
5 out from the outlet end of the oil-gas separation vessel 4, can
sequentially pass through the oil
cooler 10 and the filter 11. Thus, the temperature of the compressor oil
entering the first-stage
compressor head 1 and the second-stage compressor head 2 can be lowered, and
impurities in
the compressor oil can be reduced to guarantee cleanliness of the compressor
oil. Both the oil
cooler 10 and the filter 11 are located at an upstream end of the first oil
return pipeline 81.
10 [0077] In some embodiments, the gas compression system 100 further
includes a gas cooler
6. The gas cooler 6 is in communication with the gas exhaust end of the oil-
gas separation vessel
4, in order to cool the finally-separated compressed gas.
[0078] In some embodiments, as illustrated in FIG. 6, the gas inlet
94 of the sprayer 9 is in
communication with a gas exhaust end of the gas cooler 6, such that gas cooled
by the gas
cooler can enter the sprayer 9 to be mixed, in the sprayer 9, with the
compressor oil. Therefore,
compressed gas can be sprayed to the inter-stage stage to optimize the cooling
effect at the inter-
stage stage. In the description of the present disclosure, it should be
understood that the
orientation or position relationship indicated by the terms "center",
"longitudinal", "transverse",
"length-, "width-, "thickness-, "upper-, "lower-, "front-, "rear-, "left-,
"right-, "vertical-,
"horizontal", "top", "bottom", "inner", "outer", "clockwise",
"counterclockwise", "axial",
"radial", "circumferential", etc., is based on the orientation or position
relationship illustrated
in the drawings, and is only for the convenience of describing the present
disclosure and
simplifying the description, rather than indicating or implying that the
pointed device or element
must have a specific orientation, or be constructed and operated in a specific
orientation, and
therefore cannot be understood as a limitation of the present disclosure.
100791 In the description of the present disclosure, "first
feature" or "second feature" may
include one or more of said features.
[0080] In the description of the present disclosure, "a plurality
of' means two or more.
[0081] In the description of the present disclosure, the first
feature being -on" or -under"
the second feature may mean that the first feature is in direct contact with
the second feature,
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or the first and second features are in indirect contact through an additional
feature between the
first and second features.
[0082] In the description of the present disclosure, the first
feature being "above" the second
feature may mean that the first feature is directly above or obliquely above
the second feature,
or simply mean that the level of the first feature is higher than that of the
second feature.
[0083] In the description of this specification, descriptions with
reference to the terms "an
embodiment", "some embodiments", "illustrative embodiments", "examples",
"specific
examples-, or "some examples" etc. mean that specific features, structure,
materials or
characteristics described in conjunction with the embodiment or example are
included in at least
one embodiment or example of the present disclosure. In this specification,
the schematic
representations of the above terms do not necessarily refer to the same
embodiment or example.
Moreover, the specific described features, structures, materials or
characteristics may be
combined in any one or more embodiments or examples in a suitable manner.
[0084] Although embodiments of the present disclosure are
illustrated and described above,
those skilled in the art can make various changes, modifications,
replacements, and alternatives
to these embodiments, without departing from the principle and spirit of the
present disclosure.
The scope of the present disclosure is defined by the claims as attached and
their equivalents.
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