CN117052673A - Oil-gas separation device and compressor - Google Patents
Oil-gas separation device and compressor Download PDFInfo
- Publication number
- CN117052673A CN117052673A CN202311192987.7A CN202311192987A CN117052673A CN 117052673 A CN117052673 A CN 117052673A CN 202311192987 A CN202311192987 A CN 202311192987A CN 117052673 A CN117052673 A CN 117052673A
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- oil
- gas
- filter element
- separation device
- inner cylinder
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- 238000000926 separation method Methods 0.000 title claims abstract description 134
- 238000001914 filtration Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 17
- 239000003921 oil Substances 0.000 description 62
- 239000003507 refrigerant Substances 0.000 description 19
- 239000007788 liquid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
Abstract
The application discloses an oil-gas separation device and a compressor, wherein the oil-gas separation device comprises: the oil-gas separation device comprises a shell, wherein a separation cavity is formed in the shell, and an air inlet of the oil-gas separation device is communicated with the separation cavity; the inner cylinder is arranged in the separation cavity, the air inlet channel is formed between the outer wall of the inner cylinder and the inner wall of the separation cavity, and the air inlet is arranged at the position of the air inlet channel; the baffle bosses are arranged in the air inlet channels in a staggered mode, and all the baffle bosses divide the air inlet channels into baffle flow channels. The oil-gas separation device and the compressor effectively solve the problems of low separation efficiency and poor separation effect of the oil-gas separation device in the prior art.
Description
Technical Field
The application relates to the technical field of refrigeration equipment, in particular to an oil-gas separation device and a compressor.
Background
In screw compressors, refrigeration oil lubrication is required between the rotors to reduce compressor noise, and at the same time, refrigeration oil can reduce gas leakage during rotor engagement and improve compressor performance. Therefore, in the actual running process of the screw unit, tiny freezing oil drops are also included in addition to the gas-phase refrigerant discharged by the compressor. In the screw unit, an external oil-gas separation device is adopted to separate gas-phase refrigerant discharged by a compressor from frozen oil droplets, the frozen oil is returned to a compressor oil tank after being separated to continue spraying liquid for lubrication, and the gas-phase refrigerant enters a condenser to be condensed into medium-temperature high-pressure liquid-phase refrigerant. The discharged lubricating oil is filtered by the oil-gas separation device and returns to the compressor again, so that not only is the reduction of the heat exchange efficiency of the heat exchanger caused by the fact that the lubricating oil enters the refrigerant system avoided, but also the oil shortage and the shutdown of the compressor can be effectively avoided.
If the separation efficiency of the oil-gas separation device is low, the frozen oil can enter the refrigerant circulation and be attached to the wall surfaces of the heat exchange tubes of the evaporator and the condenser, so that a layer of oil film is formed to prevent heat exchange, and the heat transfer efficiency of the heat exchanger and the energy efficiency of the unit are reduced. Meanwhile, the lack of oil in the compressor can lead to lack of lubrication among parts and damage of the compressor.
The separation mechanism of the external oil-gas separation device comprises centrifugal separation, gravity separation, filter screen adsorption separation and collision separation, and the frozen oil is collected at the bottom of the container after being separated, so that an oil return pipe, a liquid level meter or an oil level mirror is arranged at the bottom of the container.
The oil-gas separation device in the prior art generally adopts a rotary separation structure, and has the defects of insufficient effective separation and low separation efficiency although the structure is large in size. And the complicated internal structure arrangement, structural design is unreasonable, leads to the oil-gas separation effect very poor.
In conclusion, the oil-gas separation device in the prior art has low separation efficiency and poor separation effect.
Disclosure of Invention
The embodiment of the application provides an oil-gas separation device and a compressor, which are used for solving the problems of low separation efficiency and poor separation effect of the oil-gas separation device in the prior art.
To achieve the above object, the present application provides an oil-gas separation device comprising: the oil-gas separation device comprises a shell, wherein a separation cavity is formed in the shell, and an air inlet of the oil-gas separation device is communicated with the separation cavity; the inner cylinder is arranged in the separation cavity, the air inlet channel is formed between the outer wall of the inner cylinder and the inner wall of the separation cavity, and the air inlet is arranged at the position of the air inlet channel; the baffle bosses are arranged in the air inlet channels in a staggered mode, and all the baffle bosses divide the air inlet channels into baffle flow channels.
Further, a plurality of baffle bosses are respectively connected to the outer wall of the inner cylinder and the inner wall of the separation cavity; the baffle bosses connected to the outer wall of the inner cylinder and the baffle bosses connected to the inner wall of the separation chamber are staggered.
Further, a first filter screen is arranged in the air inlet channel, and the first filter screen is paved on the outer wall of the inner cylinder; the second filter screen is arranged in the air inlet channel and paved on the inner wall of the separation cavity.
Further, the inner cylinder is cylindrical, the air inlet channel is an annular channel, and air flow entering from the air inlet spirally flows downwards along the annular channel; all the baffle bosses are arranged in a staggered manner along the circumferential direction of the annular channel at intervals.
Further, the inner cylinder is fixedly connected to the shell, an air outlet channel is formed between the inner space of the inner cylinder and the shell, and the air outlet channel is communicated with an air outlet of the oil-gas separation device.
Further, the method further comprises the following steps: the baffle plates are connected to the inner wall of the inner cylinder and positioned in the air outlet channel, and the baffle plates are arranged in a staggered mode.
Further, the method further comprises the following steps: the air homogenizing plate is connected to the inner wall of the inner cylinder and positioned in the air outlet channel, and is provided with a plurality of air homogenizing holes; the air homogenizing plate is positioned between the baffle plate and the air outlet.
Further, the gas equalization plate is conical, the diameter of the gas equalization plate gradually increases from the first end to the second end, and the first end of the gas equalization plate faces the bottom of the separation cavity.
Further, the method further comprises the following steps: the filter element is fixedly connected in the air outlet channel and is positioned between the air homogenizing plate and the air outlet; the filter element is funnel-shaped, the diameter of the filter element gradually increases from the first end of the filter element to the second end of the filter element, the diameter of the second end of the filter element is the same as the diameter of the inner wall of the inner cylinder, and the filter element is used for filtering all airflows flowing out from the air outlet.
Further, the method further comprises the following steps: the support ribs are fixedly connected with the inner wall of the inner cylinder and support and fix the filter element; the shape of the supporting rib is funnel-shaped and is matched with the shape of the filter element, and the ribs of the supporting rib drain oil drops adsorbed by the filter element.
Further, the structure of the filter element satisfies the following formula:
l＝(h 2 +d 2 /4) 0.5
Vmax＝0.2[(ρ g -ρ l )/ρ l ] 0.5
V＝Q/[πl 2 (d/l)]*10 6
0.2≤V≤Vmax；
wherein,
vmax is the maximum gas flow rate through the cartridge in units of: m/s;
v is the actual gas flow rate through the filter element, unit: m/s;
q is the air inflow of the oil separator, unit: m is m 3 /s；
ρ g To entrain frozen oil density, units: kg/m 3 ；
ρ l The density of the inlet gas is as follows: kg/m 3 ；
d is the diameter of the bottom of the funnel-shaped filter element, and the unit is: mm;
h is the height of the funnel-shaped filter element, and the unit is: mm;
l is the height of the bevel edge of the funnel-shaped filter element, and the unit is: mm.
According to another aspect of the present application, there is provided a compressor comprising the oil-gas separation device of any one of claims 1 to 11.
Further, the compressor is a screw compressor.
The air inlet channel is formed between the outer wall of the inner cylinder and the inner wall of the separation cavity, and gaseous refrigerant discharged by the compressor entrains oil drops into the air inlet channel from the air inlet and rotationally flows downwards. Because a plurality of baffle bosses form a baffle flow channel in the air inlet channel, the baffle space of the baffle flow channel increases the gas stroke and increases the oil separation time. The compressor exhaust has a certain speed, oil drops and gaseous refrigerant have different densities, the gas is baffled in the baffling flow channel under the inertia effect, the oil drops have larger density and can not be turned or are difficult to turn, and the separation is carried out in the air inlet channel, so that the effect of improving the gas-liquid separation is achieved. The structure of the application ensures the separation efficiency and simultaneously the structure of the oil-gas separation device can be more compact.
Drawings
FIG. 1 is a schematic view of the internal structure of an oil-gas separation device according to an embodiment of the present application;
FIG. 2 is a schematic illustration of one of the cross sections of an oil and gas separation device according to an embodiment of the present application;
FIG. 3 is a schematic illustration of another cross-section of an oil and gas separation device according to an embodiment of the present application;
FIG. 4 is a schematic illustration of the external configuration of an oil and gas separation device according to an embodiment of the present application;
FIG. 5 is a schematic cross-sectional view of a gas equalization plate of an oil and gas separation device of an embodiment of the present application;
FIG. 6 is a schematic top view of a gas equalization plate of an oil and gas separation device of an embodiment of the present application;
FIG. 7 is a schematic diagram of the structure of a filter element of an oil-gas separation device according to an embodiment of the present application;
FIG. 8 is a schematic top view of a filter cartridge of an oil and gas separation device according to an embodiment of the present application;
FIG. 9 is a schematic perspective view of a support rib at the bottom of a filter element of an oil and gas separator of an embodiment of the present application;
FIG. 10 is a schematic front view of a support rib at the bottom of a filter element of an oil and gas separator of an embodiment of the present application;
FIG. 11 is a schematic perspective view of a support rib on top of a filter element of an oil and gas separator of an embodiment of the present application;
FIG. 12 is a schematic front view of a support rib on top of a filter element of an oil and gas separator of an embodiment of the present application;
FIG. 13 is a schematic view of the structure of a baffle plate of an oil-gas separation device according to an embodiment of the present application.
FIG. 14 is a schematic view of the baffle boss and inner barrel of an oil and gas separator according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
Referring to fig. 1 to 14, according to an embodiment of the present application, there is provided an oil-gas separation device including a housing 10, an inner cylinder 20, and a plurality of baffle bosses 30, wherein a separation chamber 11 is formed in the housing 10, and an air inlet 12 of the oil-gas separation device communicates with the separation chamber 11; the inner cylinder 20 is arranged in the separation cavity 11, the air inlet channel 13 is formed between the outer wall of the inner cylinder 20 and the inner wall of the separation cavity 11, and the air inlet 12 is arranged at the position of the air inlet channel 13; the baffle bosses 30 are staggered in the air inlet channel 13, and all the baffle bosses 30 divide the air inlet channel 13 into baffle channels.
As shown in fig. 1 and 2, the air inlet channel 13 is formed between the outer wall of the inner cylinder 20 and the inner wall of the separation chamber 11, and the gaseous refrigerant discharged from the compressor entrains oil droplets into the air inlet channel from the air inlet and flows downward in a rotating manner. Because the baffle bosses 30 form a baffle flow channel in the air inlet channel 13, the baffle space of the baffle flow channel increases the gas stroke and increases the oil separation time. The compressor exhaust has a certain speed, oil drops and gaseous refrigerant have different densities, the gas is baffled in the baffling flow channel under the inertia effect, the oil drops have larger density and can not be turned or are difficult to turn, and the separation is carried out in the air inlet channel, so that the effect of improving the gas-liquid separation is achieved. The structure of the application ensures the separation efficiency and simultaneously the structure of the oil-gas separation device can be more compact.
Referring to fig. 2 and 14, in particular, a plurality of baffle bosses 30 are respectively connected to the outer wall of the inner cylinder 20 and the inner wall of the separation chamber 11; the baffle bosses 30 connected to the outer wall of the inner cylinder 20 and the baffle bosses 30 connected to the inner wall of the separation chamber 11 are staggered with each other, and form the baffle flow channel.
The baffle boss 30 is respectively connected to the outer wall of the inner cylinder and the inner wall of the separation cavity, so that the structure has the advantages of being more compact, fully utilizing the structural space and achieving the effect of arrangement.
It should be noted that, the baffle boss 30 is a strip boss, extends from top to bottom to form a boss structure that can affect the air flow, and the baffle bosses 30 are staggered, so that a baffle flow channel can be formed, and the height of the baffle bosses 30 can be set proportionally according to the diameter of the air inlet channel.
Preferably, the oil-gas separation device further comprises a first filter screen 41 and a second filter screen 42, the first filter screen 41 is arranged in the air inlet channel 13, and the first filter screen 41 is paved on the outer wall of the inner cylinder 20. A second filter screen 42 is provided in the intake passage 13, the second filter screen 42 being laid on the inner wall of the separation chamber 11.
The first filter screen and the second filter screen arranged in the air inlet channel are matched with the baffling boss, and the first filter screen and the second filter screen not only can separate air flow in the air inlet channel, but also can enable oil drops to be adsorbed on the filter screen. And oil drops formed by separating the baffling flow channel flow to the root of the baffling boss along the side wall of the baffling boss and then are adsorbed to the first filter screen and the second filter screen. The air flow flowing in the air inlet channel can assist to drive the oil drop to fall down or be adsorbed on the two filter screens, so that the oil efficiency is increased, and the oil-gas separation device can collect the separated frozen oil more quickly.
Referring to fig. 2, the inner cylinder 20 has a cylindrical shape, the air inlet channel 13 has an annular channel, and the air flow entering from the air inlet 12 flows downwards along the annular channel in a spiral manner; all the baffle bosses 30 are staggered along the circumferential direction of the annular channel at intervals. The annular channel can enable the flow of the air flow to be more stable, obvious flow around problems can not occur, and the air return efficiency is more stable.
The outer diameter of the inner cylinder is determined according to the flow velocity of the refrigerant in the air inlet channel, and the flow velocity of the gas refrigerant in the air inlet channel is generally not higher than 25m/s (if the flow velocity in the air inlet channel is too high, the impact kinetic energy of oil drops and the inner wall of the shell and the outer wall of the inner cylinder is larger, more tiny and dispersed oil drops can be generated after the impact, and the gas-liquid separation is not facilitated). The outer diameter of the inner cylinder is generally 30% -90% of the diameter of the shell; the lower bottom surface of the inner cylinder is required to be lower than the air inlet and the distance is more than 1 time of the diameter of the air inlet.
In order to fully utilize the internal space, the height of the air inlet is as high as possible, so that the stroke of the air in the oil content is prolonged, and the separation effect is improved. Because the length of the inner cylinder has a larger influence on the gas stroke, if the length of the inner cylinder is shorter, the gas entering from the gas inlet cannot rotationally separate from the space outside the inner cylinder at the inner side of the shell, and directly bypasses the lower bottom surface of the inner cylinder to enter the inner side of the inner cylinder.
Referring to fig. 1 and 3, the inner cylinder 20 is fixedly connected to the housing 10, an air outlet channel 21 is defined between the inner space of the inner cylinder 20 and the housing 10, and the air outlet channel 21 is communicated with the air outlet 14 of the oil-gas separation device.
The gas separated by the separation chamber flows upward from the gas outlet channel 21 inside the inner cylinder and flows out through the gas outlet at the top.
The oil-gas separation device further comprises a plurality of baffle plates 50, the baffle plates 50 are connected to the inner wall of the inner cylinder 20 and are positioned in the air outlet channel 21, and the baffle plates 50 are arranged in a staggered mode.
The gas refrigerant flows through the air inlet channel in a rotating way, and enters the air outlet channel at the inner side of the inner cylinder after bypassing the lower part of the separation cavity. The flow is deflected by a plurality of baffle plates, and the gaseous refrigerant is subjected to large-angle steering for a plurality of times in the flow channel of the baffle plates, so that oil drops collide with the inner cylinder and the baffle plates and are adsorbed under the inertia effect, thereby achieving the separation effect.
The structure of the baffle referring to fig. 13, the baffle is generally in an arch-shaped structure, the gas refrigerant circulates in a flow passage formed by upper and lower interval flow passages and arch-shaped gaps of the baffle, and the flow velocity of the gas refrigerant in the flow passage is generally not more than 5m/s. The outer diameter of the baffle plate is consistent with the inner diameter of the inner cylinder, the baffle plate is fully welded and fixed with the inner side of the inner cylinder, the gap area of the baffle plate is determined according to the gas flow rate, and the gap gas flow rate is ensured to be not more than 5m/s; in order to achieve the baffling effect, the chord length of the notch is not more than 80% of the diameter of the baffle plate. The number of the baffle plates is not less than 2, and the baffle plates can be comprehensively selected according to the internal space of the oil, the pressure loss of the oil inlet and outlet, the separation effect and the like.
Referring to fig. 5 and 6, the oil-gas separation device further includes a gas-equalizing plate 60, where the gas-equalizing plate 60 is connected to the inner wall of the inner cylinder 20 and is located in the gas outlet channel 21, and the gas-equalizing plate 60 has a plurality of gas-equalizing holes 61; the gas baffle 60 is positioned between the baffle 50 and the gas outlet 14. The flow field uniformity is poor after the gas refrigerant flows out from the notch of the baffle plate under the influence of the baffle plate. Therefore, the top of the baffle plate at the topmost layer is provided with the air homogenizing plate with a porous structure, and the air homogenizing plate can homogenize air flow again to change the uniformity of the air flow into air flow conforming to the standard.
Preferably, the gas-equalizing plate 60 is tapered, the diameter of the gas-equalizing plate 60 gradually increases from the first end to the second end, and the first end of the gas-equalizing plate 60 faces the bottom of the separation chamber 11. The air homogenizing plate is of a funnel-shaped structure, and the second end of the air homogenizing plate is fixed with the inner wall of the inner cylinder in a full-welded mode.
The gas passing holes on the gas equalizing plate are determined according to the gas flowing area, and the flow velocity of the gas passing holes is not more than 3m/s. The air passing holes are generally round, and the air passing holes can be square, elliptic and other shapes. The air homogenizing plate is funnel-shaped, so that oil drops intercepted by the air homogenizing plate can be separated conveniently.
Referring to fig. 7 and 8, the oil-gas separation device further includes a filter element 70, the filter element 70 is fixedly connected in the air outlet channel 21, and the filter element 70 is located between the air equalizing plate 60 and the air outlet 14;
the filter element 70 is funnel-shaped, the diameter of the filter element 70 gradually increases from the first end of the filter element 70 to the second end of the filter element 70, the diameter of the second end of the filter element 70 is the same as the diameter of the inner wall of the inner cylinder 20, and the filter element 70 is used for filtering all air flows flowing out from the air outlet 14.
The funnel-shaped filter element is used for separating small oil drops with particle size dispersed in the gaseous refrigerant. The filter element with the structure not only effectively increases the filtering area and improves the separation efficiency, but also can separate from the filter screen rapidly by the filtered oil drops, and reduces the influence on the separation efficiency of the filter screen.
The diameter of the second end of the filter element 70 is the same as the diameter of the inner wall of the inner cylinder 20, so that all the gas can be ensured to enter the gas outlet through the filter screen.
The oil-gas separation device further comprises supporting ribs 80, the supporting ribs 80 are fixedly connected with the inner wall of the inner cylinder 20, and the supporting ribs 80 support and fix the filter element 70;
the shape of the supporting rib 80 is funnel-shaped and matches with the shape of the filter element 70, and the ribs of the supporting rib 80 drain oil drops adsorbed by the filter element 70.
In this embodiment, two upper and lower support ribs are respectively disposed, and are respectively disposed at the top and bottom of the filter element, the support rib structure disposed at the bottom of the filter element is shown in fig. 9 and 10, and the support rib structure disposed at the top of the filter element is shown in fig. 11 and 12.
The funnel-shaped supporting ribs are arranged at the top and the bottom of the filter element and are welded with the inner wall of the inner cylinder, so that the filter element is supported and fixed. Meanwhile, ribs of the supporting ribs have a drainage effect on oil drops adsorbed by the filter element, drained oil drops are collected at the bottom of the supporting ribs, and are discharged through drainage rods (the ribs of the supporting ribs) arranged at the bottom of the supporting ribs, so that the influence of the adsorbed oil drops on the separation efficiency of the filter element is reduced.
In order to ensure the separation efficiency, the flow velocity V of the gaseous refrigerant passing through the filter element is less than or equal to Vmax (the maximum flow velocity, the flow velocity V is generally 0.8 times Vmax), and V is more than or equal to 0.2m/s (the flow velocity is too low, and the gas entrains liquid drops to bypass the filter screen steel wire and does not generate collision separation). The funnel-shaped filter screen taper is determined according to the area of the filter element, and the ratio of the height to the large diameter of the funnel-shaped filter element is not more than 3 according to the manufacturing and assembling requirements.
The filter cartridge 70 is constructed to satisfy the following equation:
l＝(h 2 +d 2 /4) 0.5
Vmax＝0.2[(ρ g -ρ l )/ρ l ] 0.5
V＝Q/[πl 2 (d/l)]*10 6
0.2≤V≤Vmax；
wherein,
vmax is the maximum gas flow rate through the cartridge in units of: m/s;
v is the actual gas flow rate through the filter element, unit: m/s;
q is the air inflow of the oil separator, unit: m is m 3 /s；
ρ g To entrain frozen oil density, units: kg/m 3 ；
ρ l The density of the inlet gas is as follows: kg/m 3 ；
d is the diameter of the bottom of the funnel-shaped filter element, and the unit is: mm;
h is the height of the funnel-shaped filter element, and the unit is: mm;
l is the height of the bevel edge of the funnel-shaped filter element, and the unit is: mm.
The formula range is obtained according to the separation efficiency measured when oil drops in different flow rate states pass through the filter screen. The separation effect is better under the condition that the general flow rate is controlled in a lower state, and an optimal flow rate range is provided according to the comprehensive evaluation of the separation efficiency and the manufacturing cost.
By adopting the oil-gas separation device of the embodiment, the oil is separated pertinently by arranging a baffling flow passage, a baffling handling filter element, a funnel-shaped filter element and other structures on the separation characteristics of large liquid drops, small liquid drops and dispersed micro liquid drops of the oil; not only the oil-gas separation device has compact structure, but also the separation effect is greatly improved.
According to an embodiment of the application, not shown, a compressor is provided, which comprises the oil and gas separation device of the above-described embodiment.
The compressor is provided with the efficient oil-gas separation device of the embodiment, the oil-gas separation device can improve the efficiency of separating the frozen oil, and the oil shortage of the compressor is avoided so as to ensure the stable operation of the unit.
Meanwhile, the oil-gas separation device can stabilize oil return, and various structures can improve separation efficiency and oil return efficiency of the unit.
Preferably, the compressor is a screw compressor.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
Of course, the above is a preferred embodiment of the present application. It should be noted that it will be apparent to those skilled in the art that several modifications and adaptations can be made without departing from the general principles of the present application, and such modifications and adaptations are intended to be comprehended within the scope of the present application.
Claims (13)
1. An oil-gas separation device is characterized in that,
a shell (10), wherein a separation cavity (11) is formed in the shell (10), and an air inlet (12) of the oil-gas separation device is communicated with the separation cavity (11);
the inner cylinder (20) is arranged in the separation cavity (11), the air inlet channel (13) is formed between the outer wall of the inner cylinder (20) and the inner wall of the separation cavity (11), and the air inlet (12) is arranged at the position of the air inlet channel (13);
the baffle bosses (30) are arranged in the air inlet channels (13) in a staggered mode, and all the baffle bosses (30) divide the air inlet channels (13) into baffle flow channels.
2. The oil-gas separation device according to claim 1, wherein,
the baffle bosses (30) are respectively connected to the outer wall of the inner cylinder (20) and the inner wall of the separation cavity (11);
the baffle bosses (30) connected to the outer wall of the inner cylinder (20) are staggered with the baffle bosses (30) connected to the inner wall of the separation chamber (11).
3. The oil-gas separation device according to claim 2, wherein,
the first filter screen (41) is arranged in the air inlet channel (13), and the first filter screen (41) is paved on the outer wall of the inner cylinder (20);
and the second filter screen (42) is arranged in the air inlet channel (13), and the second filter screen (42) is paved on the inner wall of the separation cavity (11).
4. The oil-gas separation device according to claim 2, wherein,
the inner cylinder (20) is cylindrical, the air inlet channel (13) is an annular channel, and air flow entering from the air inlet (12) spirally flows downwards along the annular channel;
all the baffle bosses (30) are staggered along the circumferential direction of the annular channel at intervals.
5. The oil-gas separation device according to claim 1, wherein,
the inner cylinder (20) is fixedly connected to the shell (10), an air outlet channel (21) is formed between the inner space of the inner cylinder (20) and the shell (10), and the air outlet channel (21) is communicated with the air outlet (14) of the oil-gas separation device.
6. The oil and gas separation device of claim 5, further comprising:
the baffle plates (50) are connected to the inner wall of the inner cylinder (20) and located in the air outlet channel (21), and the baffle plates (50) are arranged in a staggered mode.
7. The oil and gas separation device of claim 6, further comprising:
the air homogenizing plate (60), the air homogenizing plate (60) is connected to the inner wall of the inner cylinder (20) and is positioned in the air outlet channel (21), and a plurality of air homogenizing holes (61) are formed in the air homogenizing plate (60);
the gas equalization plate (60) is located between the baffle (50) and the gas outlet (14).
8. The oil and gas separation device according to claim 7, characterized in that the gas equalization plate (60) is tapered, the diameter of the gas equalization plate (60) gradually increasing from a first end towards a second end, the first end of the gas equalization plate (60) being directed towards the bottom of the separation chamber (11).
9. The oil and gas separation device of claim 7, further comprising:
the filter element (70), the said filter element (70) is fixedly connected in the said air outlet channel (21), the said filter element (70) locates between said air-homogenizing plate (60) and said air outlet (14);
the filter element (70) is funnel-shaped, the diameter of the filter element (70) gradually increases from the first end of the filter element (70) to the second end of the filter element (70), the diameter of the second end of the filter element (70) is the same as the diameter of the inner wall of the inner cylinder (20), and the filter element (70) is used for filtering all air flows flowing out from the air outlet (14).
10. The oil and gas separation device of claim 9, further comprising:
the support ribs (80) are fixedly connected with the inner wall of the inner cylinder (20), and the support ribs (80) support and fix the filter element (70);
the shape of the supporting ribs (80) is funnel-shaped and is matched with the shape of the filter element (70), and the ribs of the supporting ribs (80) drain oil drops adsorbed by the filter element (70).
11. The oil-gas separation device of claim 9, wherein,
the filter element (70) has a structure satisfying the following formula:
l＝(h 2 +d 2 /4) 0.5
Vmax＝0.2[(ρ g -ρ l )/ρ l ] 0.5
V＝Q/[πl 2 (d/l)]*10 6
0.2≤V≤Vmax；
wherein,
vmax is the maximum gas flow rate through the cartridge in units of: m/s;
v is the actual gas flow rate through the filter element, unit: m/s;
q is the air inflow of the oil separator, unit: m is m 3 /s；
ρ g To entrain frozen oil density, units: kg/m 3 ；
ρ l The density of the inlet gas is as follows: kg/m 3 ；
d is the diameter of the bottom of the funnel-shaped filter element, and the unit is: mm;
h is the height of the funnel-shaped filter element, and the unit is: mm;
l is the height of the bevel edge of the funnel-shaped filter element, and the unit is: mm.
12. A compressor comprising the oil-gas separation device according to any one of claims 1 to 11.
13. The compressor of claim 12, wherein the compressor is a screw compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311192987.7A CN117052673A (en) | 2023-09-14 | 2023-09-14 | Oil-gas separation device and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311192987.7A CN117052673A (en) | 2023-09-14 | 2023-09-14 | Oil-gas separation device and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117052673A true CN117052673A (en) | 2023-11-14 |
Family
ID=88653708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311192987.7A Pending CN117052673A (en) | 2023-09-14 | 2023-09-14 | Oil-gas separation device and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117052673A (en) |
-
2023
- 2023-09-14 CN CN202311192987.7A patent/CN117052673A/en active Pending
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