CN110762014A - Oiling assembly and horizontal compressor - Google Patents

Oiling assembly and horizontal compressor Download PDF

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Publication number
CN110762014A
CN110762014A CN201910992860.0A CN201910992860A CN110762014A CN 110762014 A CN110762014 A CN 110762014A CN 201910992860 A CN201910992860 A CN 201910992860A CN 110762014 A CN110762014 A CN 110762014A
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China
Prior art keywords
cavity
oil
partition plate
chamber
spring
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Pending
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CN201910992860.0A
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Chinese (zh)
Inventor
张远传
李定贤
梁永达
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Gree Electric Appliances Inc of Zhuhai
Zhuhai Landa Compressor Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Zhuhai Landa Compressor Co Ltd
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Application filed by Gree Electric Appliances Inc of Zhuhai, Zhuhai Landa Compressor Co Ltd filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201910992860.0A priority Critical patent/CN110762014A/en
Publication of CN110762014A publication Critical patent/CN110762014A/en
Pending legal-status Critical Current

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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
    • F04C29/04—Heating; Cooling; Heat insulation
    • 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
    • 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
    • F04C29/021—Control systems for the circulation of the lubricant

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

The invention provides an oiling assembly and a horizontal compressor, relates to the technical field of air conditioners and solves the technical problems that in the prior art, when the compressor is a variable frequency compressor, oil supply is insufficient during low-frequency work and excessive during high-frequency work. The oiling assembly comprises an oil cover, an upper oil cavity and a partition plate; the oil cover is connected with the lower flange in a sealing manner to form the upper oil cavity; the partition plate divides the upper oil cavity into a first cavity and a second cavity; the pressure loss of the refrigerant oil in the second chamber can be increased or decreased by moving the partition plate, thereby adjusting the supply amount of the refrigerant oil from the second chamber into the horizontal compressor. The upper oil cavity is divided into the first cavity and the second cavity by the partition plate, and the partition plate changes the volume of the second cavity by moving and increases or reduces the pressure loss of the second cavity, so that the refrigerating oil supply at low frequency is increased, and the refrigerating oil supply at high frequency is reduced.

Description

Oiling assembly and horizontal compressor
Technical Field
The invention relates to the technical field of air conditioners, in particular to an oiling assembly and a horizontal compressor.
Background
When the existing horizontal compressor runs, negative pressure can be formed at the tail end of a long shaft of a crankshaft due to the rotation of a rotor and a fan on the rotor, and pressure is formed at an inlet of an oil feeding pipe assembly due to the effect of the pressure of discharged refrigerants on refrigerating oil. Because the pressure that oils pipe assembly entry is greater than the terminal negative pressure of bent axle major axis for freezing oil can get into bent axle minor axis upper end from last oil pipe assembly, and freezing oil rethread bent epaxial passageway flows to each friction pair, plays the lubrication action in the operation of horizontal compressor, with reduction running friction and degree of wear, and can take away the heat that produces in the working process. This oil feeding pipe subassembly structure mainly is applicable to the unchangeable fixed frequency compressor of rotational speed, and when the compressor was frequency conversion compressor, the excessive or not enough problem of fuel feeding can appear.
According to the principles of fluid mechanics, the total pressure loss in a pipe includes both the on-way pressure loss and the local pressure loss. According to the formula of on-way pressure loss
Figure BDA0002238822040000011
Wherein lambda represents the on-way resistance coefficient and is related to the roughness of the pipeline, l represents the length of the pipeline, d represents the inner diameter of the pipeline, rho is the density of the liquid and v is the average flow velocity of the liquid, the density of the liquid is kept unchanged, and the average flow velocity of the liquid is basically kept unchanged. The on-way pressure loss of the frozen oil from the oil feeding pipe pipeline to the crankshaft oil suction port can be ignored, and the total pressure loss of the frozen oil passing through the oil feeding pipe component can be considered as
Figure BDA0002238822040000012
According to the formula of local pressure loss
Figure BDA0002238822040000013
Where ζ is the local coefficient of resistance, and is related to the size of the corner (other special structures typically found in piping systems, such as bends, sudden expansions or contractions of flow passages, valves, tees, etc., provide the magnitude and direction of flow as liquid flows through localized regions of these pipesThe direction of the liquid is forced to change to form a dead water area or a vortex area, the liquid does not participate in main flow in the area, the liquid continuously swirls to accelerate liquid friction or cause particle collision, a corner is formed, the larger the corner is, the larger the energy loss of the liquid in the vortex area is), the larger the corner value is, the larger the local pressure loss is, rho is the density of the liquid to be kept unchanged, and v is the average flow velocity of the liquid to be kept unchanged basically. As shown in fig. 1, the frozen oil enters the oil cover 1 ', the crankshaft 6' and the upper oil cavity enclosed by the lower flange 7 'through the upper oil pipe 31', and due to the impact, inertia and boundary layer influence of the fluid, the energy loss is caused by the vortex formed in the corner region (two right-angle positions at the right side in the oil cover 1 'in fig. 1 and the contact position of the upper oil cavity and the lower flange 7', which are marked by spiral lines in the figure), so that the pressure drop is caused, and the local pressure loss is generated at several corners of the upper oil cavity.
The applicant has found that the prior art has at least the following technical problems:
when the compressor is a variable frequency compressor, the energy loss of the refrigeration oil is large during low-frequency work to cause insufficient oil supply, and the refrigeration oil absorbed by the compressor is excessive during high-frequency work to cause excessive oil supply.
Disclosure of Invention
The invention aims to provide an oiling assembly and a horizontal compressor, and aims to solve the technical problems that when the compressor is a variable frequency compressor in the prior art, the energy loss of refrigeration oil is large during low-frequency work to cause insufficient oil supply, and the refrigeration oil sucked by the compressor is excessive during high-frequency work to cause excessive oil supply. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides an oiling assembly which comprises an oil cover, an upper oil cavity and a partition plate, wherein the oil cover is arranged on the oil cover; the oil cover is connected with the lower flange in a sealing manner to form the upper oil cavity; the partition plate divides the upper oil cavity into a first cavity and a second cavity; the pressure loss of the refrigerant oil in the second chamber can be increased or decreased by moving the partition plate, thereby adjusting the supply amount of the refrigerant oil from the second chamber into the horizontal compressor.
Optionally, the first cavity is adjacent to an end cover of the horizontal compressor, and the second cavity is adjacent to a crankshaft and a lower flange of the horizontal compressor.
Optionally, the oiling assembly further comprises a vent pipe, one end of the vent pipe is communicated with the pressure generating device, and the other end of the vent pipe is communicated with the first cavity.
Optionally, the pressure generating device may increase the pressure in the first cavity, push the partition to move toward the second cavity, and reduce the volume of the second cavity.
Optionally, the pressure generating device may reduce the pressure in the first cavity, push the partition plate to move toward the first cavity, and increase the volume of the second cavity.
Optionally, the oiling assembly further comprises an oiling pipe, one end of the oiling pipe is communicated with the oil storage area of the horizontal compressor, and the other end of the oiling pipe is communicated with the second cavity.
Optionally, a balancing device is arranged in the upper oil cavity, and the balancing device can enable the partition plate to horizontally slide in the upper oil cavity.
Optionally, the balancing device comprises a first spring disposed within the first cavity and a second spring disposed within the second cavity.
Optionally, one end of each of the first spring and the second spring abuts against the partition plate.
A horizontal compressor comprises the oiling assembly.
Any technical scheme can at least produce the following technical effects:
according to the invention, the upper oil cavity is divided into the first cavity and the second cavity by the partition plate, and the size of the corner close to the partition plate is increased or reduced by changing the volume of the second cavity through movement of the partition plate under the action of external force. When the horizontal compressor is in a low-frequency working condition, the partition plate reduces the volume of the second cavity through movement, the corner close to the partition plate is reduced, the pressure loss of the refrigeration oil in the second cavity is reduced, the refrigeration oil supply during low frequency is increased, and the problem of insufficient refrigeration oil supply during low frequency is solved. When the horizontal compressor is in a high-frequency working condition, the partition plate increases the volume of the second cavity through movement, the corner close to the partition plate increases, and the pressure loss of the refrigeration oil in the second cavity increases, so that the oil supply amount in high frequency is reduced, and the problem of excessive oil supply of the refrigeration oil in high frequency is solved. By changing the supply amount of the refrigeration oil at low frequency and high frequency, the heat exchange and lubrication effects of the refrigeration oil can be better considered, and the performance of the horizontal compressor and the reliability of parts are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic illustration of a prior art oiling assembly;
FIG. 2 is a schematic view of a oiling assembly of the present invention;
fig. 3 is a schematic view of the horizontal type compressor of the present invention.
In the figure 1, an oil cover; 2. a first cavity; 21. an air duct; 22. a first spring; 3. a second cavity; 31. feeding an oil pipe; 32. a second spring; 4. a partition plate; 5. an end cap; 6. a crankshaft; 7. a lower flange; 8. an oil reservoir region.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides an oiling assembly, which is shown in figures 2-3 and comprises an oil cover 1, an upper oil cavity and a partition plate 4. The oil cover 1 is connected with the lower flange 7 in a sealing mode to form an upper oil cavity, the upper oil cavity is arranged between the lower flange 7 and the end cover 5, and the frozen oil in the upper oil cavity enters each friction pair of the horizontal compressor pump body through an oil suction port channel at the position of the crankshaft 6. Baffle 4 will go up the oil cavity and separate for first cavity 2 and second cavity 3, baffle 4 is solid construction, avoid the refrigeration oil to get into first cavity 2, the preferred rubber of baffle 4, plastics etc. have better elastic material to realize and go up the better cooperation of oil cavity inboard, baffle 4 slides through upside and downside butt with oil cover 1 is inside, and make baffle 4 can remove and first cavity 2 and second cavity 3 do not communicate each other in last oil cavity, be similar to common piston. The pressure loss of the refrigerant oil in the second chamber 3 can be increased or decreased by moving the partition plate 4, thereby adjusting the supply amount of the refrigerant oil from the second chamber 3 into the horizontal compressor. Under the action of external force, such as fluid pressure, solid structure thrust and the like, the partition plate 4 moves close to the second cavity 3 or away from the second cavity 3, and the volume of the second cavity 3 is changed, so that the size of a corner is changed (the corner of the second cavity 3 is an area marked by a spiral line in fig. 2, namely a vortex area formed by a plurality of acute angles around the second cavity 3, including the contact position of the partition plate 4 in the second cavity 3 and the contact position of the lower flange 7 in the second cavity 3, and the corner formed by the contact position of the partition plate 4 in the second cavity 3 can change along with the movement of the partition plate 4), the pressure loss of the refrigerant oil in the second cavity 3 is reduced, and the adjustment of the supply amount of the refrigerant oil entering the horizontal compressor through the second cavity 3 is realized. When the horizontal compressor is in a low-frequency working condition, the size of the second cavity 3 is reduced by moving the partition plate 4, the corner close to the partition plate 4 is reduced, namely the vortex area is reduced, the pressure loss of the refrigerant oil in the second cavity 3 is reduced, namely the pressure of the refrigerant oil entering the oil suction port channel at the crankshaft 6 is increased, the refrigerant oil enters the horizontal compressor from the second cavity 3, the flow rate of the refrigerant oil entering the channel in the crankshaft 6 is increased, the problem that the refrigerant oil is not sufficiently supplied at low frequency is solved, the lubricating requirement cannot be guaranteed by the refrigerant oil, the problems that the compressor is abnormally abraded easily, the reliability is reduced and the like are solved, the stable supply of the refrigerant oil of the horizontal compressor is realized, and the refrigerant oil required by each friction pair in the pump body. When horizontal compressor is in the high frequency operating mode, baffle 4 is through removing the volume that increases second cavity 3, the corner increase that is close to baffle 4 is the regional increase of vortex promptly, the vortex phenomenon in the subassembly that oils becomes serious, the loss of pressure increase of the interior refrigeration oil of second cavity 3, the refrigeration oil pressure that gets into 6 department's oil suction opening passageways of bent axle diminishes promptly, then refrigeration oil gets into horizontal compressor from second cavity 3 again, the flow that refrigeration oil got into 6 interior passageways of bent axle can reduce, thereby the fuel feeding when having reduced the high frequency, the excessive problem of refrigeration oil fuel feeding when having solved the high frequency, reduce compressor exhaust oil mass, avoid refrigeration oil to excessively influence the heat transfer of air conditioning system, reduce air conditioning performance. The refrigeration oil supply amount in low frequency and high frequency is changed, so that the refrigeration oil of the horizontal compressor is stably supplied, the heat exchange and lubrication effects of the refrigeration oil can be better considered, and the performance of the horizontal compressor and the reliability of parts are improved.
As an alternative embodiment, as shown in fig. 3, the first cavity 2 and the second cavity 3 are distributed left and right, and the partition plate 4 may be vertically arranged or obliquely arranged in the upper oil cavity, and is preferably vertically arranged to realize better left and right movement of the partition plate 4 in the upper oil cavity. The first cavity 2 is adjacent to an end cover 5 of the horizontal compressor and is positioned on the left side of the upper oil cavity, and the second cavity 3 is adjacent to a crankshaft 6 and a lower flange 7 of the horizontal compressor and is positioned on the right side of the upper oil cavity. The second cavity 3 is positioned at the right side, so that the volume of the second cavity 3 can be changed by controlling the pressure in the first cavity 2 to drive the partition plate 4 to move, the corner close to the side of the partition plate 4 is increased or reduced, and the pressure loss of the refrigerating oil in the second cavity 3 is changed.
As an optional implementation manner, as shown in fig. 2, the oiling assembly further includes a vent pipe 21, the vent pipe 21 opens the end cover 5 and the right oil cover 1, one end of the vent pipe 21 is communicated with a pressure generating device (not shown in the figure) outside the horizontal compressor, the pressure generating device may be a common small piston cylinder, hydraulic cylinder or micro inflator pump (which can perform inflation and air suction), the other end of the vent pipe 21 is communicated with the first cavity 2, so that external air can enter the first cavity 2 through the vent pipe 21, and the pressure generating device can increase or decrease the pressure inside the first cavity 2 through input of air with different pressures. The pressure generating device can increase the pressure in the first cavity 2 in modes of inflation and the like, so that the pressure in the first cavity 2 is greater than the pressure in the second cavity 3, the partition plate 4 is pushed to move towards the second cavity 3 under the action of the pressure, and the volume of the second cavity 3 is reduced. The pressure generating device can reduce the pressure in the first cavity 2 in modes of air suction and the like, so that the pressure in the first cavity 2 is smaller than the pressure in the second cavity 3, the partition plate 4 is pushed to move towards the first cavity 2 under the action of the pressure, and the volume of the second cavity 3 is increased. For example, when the horizontal compressor uses the R410A refrigerant, under the normal working condition, the discharge pressure of the compressor is approximately 3.35MPa, and the pressure in the second cavity 3 is slightly less than 3.35 MPa. The pressure generating device enables the pressure intensity in the first cavity 2 to be larger than 3.35MPa, the partition plate 4 can move towards the second cavity 3 under the pushing action of air pressure, and the volume of the second cavity 3 is reduced; the pressure generating device enables the pressure in the first cavity 2 to be less than 3.35MPa, so that the partition plate 4 can move towards the first cavity 2, and the volume of the second cavity 3 is increased. The movement of the diaphragm 4 is made easier by the pressure generating means.
As an alternative embodiment, as shown in fig. 2-3, the oiling assembly further comprises an oiling pipe 31, the oiling pipe 31 is a transportation pipeline of the refrigeration oil, one end of the oiling pipe 31 is communicated with the oil storage area 8 of the horizontal compressor, and the other end is communicated with the second cavity 3. When the horizontal compressor is operated, the refrigerating oil in the lower oil storage area 8 enters the second cavity 3 through the oil feeding pipe 31 and then enters each friction pair.
As an alternative embodiment, as shown in fig. 2, a balancing device is disposed in the upper oil cavity, the balancing device can enable the partition plate 4 to horizontally slide in the upper oil cavity, and the balancing device can prevent the partition plate 4 from sliding in the upper oil cavity due to the influence of side turning or inclination and the like caused by uneven stress on various parts. The balancing means comprises a first spring 22 and a second spring 32, the first spring 22 being arranged in the first chamber 2 and the second spring 32 being arranged in the second chamber 3. Preferably, the first spring 22 and the second spring 32 are both transversely arranged, and the transverse arrangement can enable the elastic force of the springs to better correspond to the moving direction of the partition board 4, so that the control of the movement of the partition board 4 is facilitated. Meanwhile, the free lengths (i.e. the lengths of the two ends of the spring when no external force is applied) of the first spring 22 and the second spring 32 are both greater than the total length of the upper oil chamber, and the first spring 22 and the second spring 32 are both always in a compressed state in the first cavity 2 and the second cavity 3. The elastic coefficients of the first spring 22 and the second spring 32 are set according to the use requirement, so that the movement of the partition plate 4 can be prevented from being greatly hindered or the partition plate 4 cannot move. First spring 22, second spring 32 all have one end and 4 butts of baffle, and the other end and the oil blanket 1 butt of first spring 22 can set up the arch in left oil blanket 1 inside and the left inside of baffle 4 and be convenient for first spring 22 better fixed, and the other end and bent axle 6 and lower flange 7 butt of second spring 32 can set up the arch on the right side of baffle 4 and the left side of lower flange 7 and be convenient for second spring 32 better fixed. The first spring 22 and the second spring 32 are preferably located opposite to each other, i.e. at the same height, so as to achieve better control of the movement of the partition 4. The first spring 22 and the second spring 32 can also be provided with a diameter slightly smaller than the inner circle of the upper oil cavity, so that the first spring 22 and the second spring 32 are fixed by abutting against the inner side of the upper oil cavity. When the pressure difference between the first cavity 2 and the second cavity 3 is too large, the first spring 22 and the second spring 32 can play a role of buffering, and the baffle plate 4 is prevented from moving too fast to a certain direction. Under the balance action of the first spring 22 and the second spring 32, the balance relationship between the first cavity 2 and the second cavity 3 can be expressed as:
PaS+kaxa＝PbS+kbxb
wherein: paIs the pressure in the first chamber 2, PbIs the pressure in the second chamber 3, kaIs the elastic coefficient, x, of the first spring 22aIs the compression deformation amount, k, of the first spring 22bIs the elastic coefficient, x, of the second spring 32bIs the amount of compression deformation of the second spring 32, and S is the cross-sectional area of the partition plate 4.
The horizontal compressor comprises the oiling assembly provided by the invention, and through the oiling assembly provided by the invention, when the horizontal compressor works under different frequencies, the pressure loss of the refrigeration oil is changed through the left and right movement of the partition plate 4, so that the flow rate of the refrigeration oil and the oil supply quantity of the compressor are not greatly changed, the problems of excessive oil supply quantity at high frequency and insufficient oil supply quantity at low frequency are avoided, the heat exchange and lubrication effects of the refrigeration oil are considered, the performance of the horizontal compressor and the reliability of parts are improved, and the service life of the horizontal compressor is prolonged.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The oiling assembly is characterized by comprising an oil cover, an upper oil cavity and a partition plate; the oil cover is connected with the lower flange in a sealing manner to form the upper oil cavity; the partition plate divides the upper oil cavity into a first cavity and a second cavity; the pressure loss of the refrigerant oil in the second chamber can be increased or decreased by moving the partition plate, thereby adjusting the supply amount of the refrigerant oil from the second chamber into the horizontal compressor.
2. The oiling assembly of claim 1 wherein the first cavity is adjacent to an end cap of the horizontal compressor and the second cavity is adjacent to a crankshaft and a lower flange of the horizontal compressor.
3. The oiling assembly according to claim 1, further comprising a vent pipe, one end of which communicates with the pressure generating means and the other end communicates with the first cavity.
4. The oiling assembly of claim 3, wherein the pressure generating device is capable of increasing the pressure in the first chamber and pushing the baffle plate to move towards the second chamber, thereby reducing the volume of the second chamber.
5. The oiling assembly of claim 3, wherein the pressure generating device is capable of reducing the pressure inside the first chamber, pushing the baffle plate to move towards the first chamber, and increasing the volume of the second chamber.
6. The oiling assembly of claim 1 further comprising an oil feed tube, one end of the oil feed tube being in communication with the oil storage area of the horizontal compressor and the other end being in communication with the second cavity.
7. Oiling assembly according to claim 1, wherein balancing means are provided inside the oiling cavity, which enable the horizontal sliding of the partition inside the oiling cavity.
8. The oiling assembly of claim 7 wherein the balancing means comprises a first spring and a second spring, the first spring being disposed within the first cavity and the second spring being disposed within the second cavity.
9. The oiling assembly of claim 8 wherein the first and second springs each have one end abutting the baffle.
10. A horizontal compressor, characterized in that it comprises an oiling assembly according to any of claims 1-9.
CN201910992860.0A 2019-10-18 2019-10-18 Oiling assembly and horizontal compressor Pending CN110762014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910992860.0A CN110762014A (en) 2019-10-18 2019-10-18 Oiling assembly and horizontal compressor

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Application Number Priority Date Filing Date Title
CN201910992860.0A CN110762014A (en) 2019-10-18 2019-10-18 Oiling assembly and horizontal compressor

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CN110762014A true CN110762014A (en) 2020-02-07

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CN201910992860.0A Pending CN110762014A (en) 2019-10-18 2019-10-18 Oiling assembly and horizontal compressor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114607605A (en) * 2022-03-28 2022-06-10 安徽金日晟矿业有限责任公司 Double-screw air compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114607605A (en) * 2022-03-28 2022-06-10 安徽金日晟矿业有限责任公司 Double-screw air compressor
CN114607605B (en) * 2022-03-28 2024-01-05 安徽金日晟矿业有限责任公司 Double-screw air compressor

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