CN214660859U - Oil sump oil return structure, compressor and air conditioner - Google Patents
Oil sump oil return structure, compressor and air conditioner Download PDFInfo
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- CN214660859U CN214660859U CN202120178523.0U CN202120178523U CN214660859U CN 214660859 U CN214660859 U CN 214660859U CN 202120178523 U CN202120178523 U CN 202120178523U CN 214660859 U CN214660859 U CN 214660859U
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Abstract
The utility model provides an oil bath oil return structure, compressor and air conditioner, oil bath oil return structure includes: the lubricating oil pool is arranged on an upper bracket of the compressor; the bottom oil pool is arranged at the bottom of the shell of the compressor; the oil return channel is communicated with the lubricating oil pool and the bottom oil pool and is configured to enable lubricating oil in the lubricating oil pool to flow back into the bottom oil pool; and the oil pumping device is arranged on the oil return passage and is configured to increase the oil return capacity of the oil return passage. The utility model discloses oil bath oil return structure, the bottom oil bath in the lubricating oil bath and the compressor casing in compressor internal design oil return passageway intercommunication upper bracket makes fluid in the lubricating oil bath can flow back to the bottom oil bath, keeps the liquid level height in bottom oil bath, improves fluid at the inside circulation efficiency of compressor, reduces the liquid volume of taking of refrigerant, prevents the inside lack of oil of compressor, guarantees the normal operating of compressor.
Description
Technical Field
The utility model belongs to the technical field of the compressor, concretely relates to oil bath oil return structure, compressor and air conditioner.
Background
The scroll compressor has the advantages of simple structure, small volume, excellent performance, high stability, few reciprocating components and the like, and is widely used as an air conditioner compression mechanism. However, in the scroll compressor, friction wear and gap leakage between the mating end surfaces of the friction pairs are easily generated due to the movable and stationary scrolls, the movable scroll and the oldham ring, the upper bracket supporting surface, the crankshaft and the like, which become important factors affecting the performance and reliability of the compressor. When the frequency conversion scroll compressor is in system matching test, the compressor is in high-frequency operation, the oil quantity at the bottom of an oil pool inside the compressor is less, most of oil is carried by a refrigerant and enters a circulating system, oil shortage inside a single compressor can be caused, each friction pair cannot be well lubricated, the abrasion reliability of the compressor is reduced, the refrigerant oil enters a condenser and an evaporator, the heat exchange capacity of the system is reduced, and the matching performance of the system is reduced.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model is that the lubricating oil of compressor causes the inside lack of oil of compressor in being smugglied secretly the entering circulation system by the refrigerant, appears wearing and tearing.
In order to solve the above problem, the utility model provides an oil sump oil return structure, include:
the lubricating oil pool is arranged on an upper bracket of the compressor;
the bottom oil pool is arranged at the bottom of the shell of the compressor;
the oil return channel is communicated with the lubricating oil pool and the bottom oil pool and is configured to enable lubricating oil in the lubricating oil pool to flow back into the bottom oil pool;
and the oil pumping device is arranged on the oil return passage and is configured to increase the oil return capacity of the oil return passage.
In some embodiments, the oil return passage further includes a cooling section, a position of the cooling section corresponding to a position of a stator of the compressor, the cooling section configured to be capable of cooling the stator of the compressor.
In some embodiments, the cooling segments are helically wound around the stator.
In some embodiments, the cooling segments surround at least three revolutions of the stator.
In some embodiments, the oil return passage includes a first passage provided on the upper bracket, and the inlet of the oil pumping device communicates with the first passage; when the oil return passage comprises the cooling section, the outlet of the oil pumping device is communicated with the inlet of the cooling section; the outlet of the cooling section is communicated with the bottom oil pool.
In some embodiments, the oil pumping device includes an oil pump communicated with the oil return passage, the oil pump is configured to provide a pumping force for lubricating oil in the oil return passage, the transmission mechanism is configured to couple the oil pump with a crankshaft of the compressor in a power mode, and the transmission mechanism is configured to drive the oil pump to pump oil by means of rotation of the crankshaft.
In some embodiments, the oil pump comprises at least one of a gear pump, a gerotor oil pump, a vane pump, and a screw pump.
In some embodiments, the oil pump includes a gear pump having a rotating shaft with a driven gear thereon and a driving gear on the crankshaft, the driving gear meshing with the driven gear, the crankshaft driving the rotating shaft to rotate.
In some embodiments, the rotating shaft intersects the crankshaft, the driving gear is a bevel gear, and the driven gear is a bevel gear.
In some embodiments, the oil pump includes a gear pump, the gear pump includes a pump body, a first gear and a second gear are arranged in the pump body, the first gear is meshed with the second gear, and the pump body is provided with an oil suction cavity and an oil discharge cavity.
In some embodiments, the oil pump comprises a gerotor oil pump comprising a pump body having an outer rotor and an inner rotor disposed therein.
A compressor adopts foretell oil sump oil return structure.
An air conditioner adopts foretell oil sump oil return structure.
The utility model provides an oil bath oil return structure, compressor and air conditioner have following beneficial effect at least:
the utility model discloses oil bath oil return structure, bottom oil bath in the lubricating oil pond in the compressor internal design oil return passageway intercommunication upper bracket and the compressor casing, make the fluid in the lubricating oil pond can flow back to bottom oil bath, keep the liquid level height in bottom oil bath, and improve oil return channel's oil return ability through the pump oil device, the compressor operation in-process has been solved, especially when high frequency operation, along with the improvement of bent axle rotational speed, bent axle pump oil ability improves, a large amount of fluid is inhaled and the hydrops is in the lubricating oil pond, the condition of fluid is smugglied secretly to the aggravation refrigerant, improve oil return ability through the pump oil device, improve the circulation efficiency of fluid in the compressor inside, reduce the liquid volume of taking of refrigerant, prevent the inside lack of oil of compressor, guarantee the normal operating of compressor.
Drawings
Fig. 1 is the structure diagram of the oil return structure of the oil sump of the embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an oil pumping device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an oil pump according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an oil pump according to another embodiment of the present invention.
The reference numerals are represented as:
1. a lubricating oil sump; 2. a bottom oil sump; 3. an upper bracket; 4. a housing; 5. an oil return passage; 6. a cooling section; 7. a stator; 8. an oil pumping device; 9. a first channel; 10. an oil pump; 11. a transmission mechanism; 12. a rotating shaft; 13. a crankshaft; 14. a driven gear; 15. a driving gear; 16. a first gear; 17. a second gear; 18. an oil suction cavity; 19. an oil discharge cavity; 20. a pump body; 23. an inner rotor; 24. and an outer rotor.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, this embodiment provides an oil return structure of an oil sump, including: the lubricating oil pool 1 is arranged on an upper bracket 3 of the compressor; the bottom oil pool 2 is arranged at the bottom of a shell 4 of the compressor; the oil return channel 5 is communicated with the lubricating oil pool 1 and the bottom oil pool 2, and the oil return channel 5 is configured to enable lubricating oil in the lubricating oil pool 1 to flow back into the bottom oil pool 2; the oil return passage 5 is provided with an oil pumping device 8, and the oil pumping device 8 is configured to increase the oil return capacity of the oil return passage 5.
The oil tank oil return structure of the embodiment of the utility model is characterized in that an oil return channel 5 is designed in the compressor to communicate the lubricating oil tank 1 in the upper bracket 3 and the bottom oil tank 2 in the compressor shell 4, so that the oil in the lubricating oil tank 1 can flow back to the bottom oil tank 2, the liquid level height of the bottom oil tank 2 is kept, the oil return capacity of the oil return channel 5 is improved by the oil pumping device 8, so that the problems that in the running process of the compressor, especially, when the engine runs at high frequency, the oil pumping capacity of the crankshaft 13 is improved along with the improvement of the rotating speed of the crankshaft 13, a large amount of oil is sucked and accumulated in the lubricating oil pool 1, the condition that the oil is entrained by the refrigerant is aggravated, the oil return capacity is improved through the oil pumping device 8, the circulation efficiency of oil liquid in the compressor is improved, the liquid carrying capacity of a refrigerant is reduced, the internal oil shortage of the compressor is prevented, the normal operation of the compressor is guaranteed, and meanwhile the performance and noise problems of the whole machine are improved.
In some embodiments, in the vertical scroll compressor, the oil return channel 5 needs to flow through the motor part of the compressor during the process of returning the lubricating oil pool 1 to the bottom oil pool 2, the oil return channel 5 further comprises a cooling section 6, the position of the cooling section 6 corresponds to the position of the stator 7 of the compressor, and the cooling section 6 is configured to cool the stator 7 of the compressor. This embodiment sets up on oil return passage 5 and can carry out refrigerated part to stator 7, can cool off stator 7 at the oil return in-process, has solved under the abominable operating mode of compressor, and the problem of motor temperature is too high, is favorable to cooling to reduce stator 7 operating temperature, promotes compressor reliability.
In some embodiments, in order to improve the cooling effect of the cooling section 6 on the stator 7, the cooling section 6 spirally surrounds the stator 7, and the spiral cooling section 6 uniformly surrounds the stator 7 along the axial direction, so as to provide uniform and efficient cooling for the stator 7, which is beneficial to uniformly reducing the working temperature of the stator 7 and improving the reliability of the compressor.
Preferably, the cooling section 6 surrounds the stator 7 for at least three circles, so that the cooling area of the cooling section 6 on the stator 7 is uniformly distributed, the working temperature of the stator 7 is uniformly distributed, and the reliability of the compressor is improved.
In some embodiments, the oil return passage 5 includes a first passage 9 provided on the upper bracket 3, and an inlet of the oil pumping device 8 communicates with the first passage 9; when the oil return passage 5 includes the cooling section 6, the outlet of the oil pumping device 8 communicates with the inlet of the cooling section 6; the export of cooling section 6 and bottom oil bath 2 intercommunication to, form the oil return passage 5 that can high-efficient oil return in compressor housing 4, under the pump sending of pump oil device 8, fluid is flowed out upper bracket 3 through first passageway 9 by lubricating oil bath 1, through the suction of pump oil device 8, discharges, and fluid encircles along stator 7, cools off stator 7 simultaneously, finally flows back to bottom oil bath 2.
Since the inside of the compressor is a completely closed high-pressure space, the driving of the oil pumping device 8 is a problem which is difficult to solve. In some embodiments, the oil pumping device 8 includes an oil pump 10, and a transmission mechanism 11, the oil pump 10 is communicated with the oil return passage 5, the oil pump 10 is configured to provide a pumping force for lubricating oil in the oil return passage 5, the transmission mechanism 11 is configured to couple the oil pump 10 with a crankshaft 13 of the compressor in a power mode, and the transmission mechanism 11 is configured to drive the oil pump 10 to pump oil by rotation of the crankshaft 13.
Therefore, in the completely closed compressor, the oil pump 10 obtains power through the power connection with the crankshaft 13, an additional driving device does not need to be designed for the oil pump 10, the occupation of the internal space of the compressor is reduced, the punching of the compressor shell 4 is avoided, the air tightness of the compressor is reduced, and the working reliability of the compressor is ensured.
In some embodiments, the oil pump 10 includes at least one of a gear pump, a gerotor oil pump, a vane pump, and a screw pump. These oil pump types can achieve the technical object of the present embodiment.
In some embodiments, in order to smoothly drive the gear pump by using the crankshaft 13 to pump oil, the oil pump 10 includes a gear pump, the gear pump is provided with a rotating shaft 12, a driven gear 14 is provided on the rotating shaft 12, a driving gear 15 is provided on the crankshaft 13, the driving gear 15 is engaged with the driven gear 14, the driving gear 15 and the crankshaft 13 rotate at the same speed, and the crankshaft 13 drives the rotating shaft 12 to rotate.
In some embodiments, the transmission ratio i of the driving gear 15 to the driven gear 14 satisfies:
i＝n1:n2＝Z1:Z2
in the formula, n1、n2The rotation speed of the driving gear 15 and the rotation speed of the driven gear 14; z1、Z2The number of teeth of the drive gear 15 and the number of teeth of the driven gear 14.
In some embodiments, the gear pump pumps oil centrifugally, the rotating shaft 12 is disposed to intersect the crankshaft 13, the driving gear 15 is a bevel gear, and the driven gear 14 is a bevel gear, so as to transmit motion and power between the two perpendicular intersecting rotating shafts 12 and the crankshaft 13.
In some embodiments, the oil pump 10 includes a gear pump, the gear pump includes a pump body 20, a first gear 16 and a second gear 17 are disposed in the pump body 20, the first gear 16 is engaged with the second gear 17, and the pump body 20 is disposed with an oil suction cavity 18 and an oil discharge cavity 19. The size of the inner diameter of the oil suction cavity 18 is approximately equal to 1.5 times that of the oil discharge cavity 19, the first gear 16 is meshed with the second gear 17, one gear serves as a driving wheel, the other gear serves as a driven wheel, and high-speed rotation enables the environment in the cavity to establish pressure difference, namely the oil suction cavity 18 is in a low-pressure environment, and the oil discharge cavity 19 is in a high-pressure environment, so that lubricating oil in the upper bracket 3 is guided into the oil return channel 5.
In some embodiments, the oil pump 10 includes a rotor type oil pump, the rotor type oil pump includes a pump body 20, an outer rotor 24 and an inner rotor 23 are disposed in the pump body 20, the inner rotor 23 is fixed on the rotating shaft 12 by a key or a pin and is driven by the rotating shaft 12, the eccentricity of the centers of the inner rotor 23 and the outer rotor 24 is e, the inner rotor 23 drives the outer rotor 24 to rotate together in the same direction, the volumes of the inner and outer rotors are changed to establish a pressure difference, that is, the oil suction cavity 18 is in a low pressure environment, and the oil discharge cavity 19 is in a high pressure environment, so as to introduce the lubricating oil in the upper bracket 3 into the oil return channel 5. The oil pump 10 has the advantages of simple structure, stable operation, lower manufacturing and processing cost and good oil return effect.
When the compressor starts to operate, the lubricating oil in the bottom oil pool 2 flows to the lubricating oil pool 1 along the side wall of the inner hole of the crankshaft 13, wherein one part of the oil is used for lubricating metal friction between the movable scroll and the upper bracket 3, and the other part of the oil flows back to the first channel 9. When the crankshaft 13 starts to drive, the driving gear 15 can be driven to mesh with the driven gear 14 of the mating part. Meanwhile, the rotating shaft 12 in the oil pump 10 is set to start to operate, the rotating speed n2 of the rotating shaft 12 is greater than the rotating speed n1 of the crankshaft 13 due to the existence of the transmission ratio, and pressure difference can be quickly established in the cavity of the oil pump 10 to convey the lubricating oil in the upper bracket 3 to the oil return channel 5. The cooling section 6 is vertical and surrounds the side wall of the motor stator 7, and lubricating oil flows into the bottom oil pool 2 under the action of gravity and pressure difference to complete circulation.
In the related art scroll compressor, when a refrigerant is sucked into the casing 4, numerous closed crescent suction chambers are formed between the fixed scroll and the orbiting scroll. The gas increases along with the rotating speed of the compressor in the compression process, the exhaust rate of the compressor increases, the gas flow speed in the cavity at the upper part of the motor is higher than the oil return speed, the direction of the gas flow speed is deviated to one side of the exhaust pipe, the oil return path is restrained by the semi-closed oil return sheet metal part, the self gravity of oil drops is smaller than the resistance of the exhaust gas to the oil drops, and the high-speed gas is easy to disperse the oil in the oil return pipeline and is taken out of the exhaust pipe to enter a circulating system.
The utility model provides a compressor oil sump oil return cooling structure has established appointed lubricating oil flow direction passageway to rely on oil return gear pump pressure differential's establishment, make the lubricating oil in the upper bracket 3 constantly flow back. Not only reduced and moved between vortex dish and static vortex dish, upper bracket 3 and move the friction wear such as between the vortex dish, effectively reduced the lubricating oil moreover and sneaked into refrigerant gas, flow to the probability of system, avoided the reliability performance to descend. Meanwhile, the circulating oil path is designed around the passage of the motor stator 7, so that the potential risks of deformation and breakage caused by overlong pipelines are avoided to a certain extent, and the temperature of the motor is controlled through the circulating oil path, so that the reliability and the performance of the motor are stably improved. A compressor adopts foretell oil sump oil return structure.
An air conditioner adopts foretell oil sump oil return structure.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (13)
1. The utility model provides an oil sump oil return structure which characterized in that includes:
the lubricating oil pool (1), the said lubricating oil pool (1) is set up on the upper bracket (3) of the compressor;
the bottom oil pool (2), the bottom oil pool (2) is arranged at the bottom of the shell (4) of the compressor;
an oil return passage (5), wherein the oil return passage (5) communicates the lubricating oil pool (1) and the bottom oil pool (2), and the oil return passage (5) is configured to enable lubricating oil in the lubricating oil pool (1) to flow back into the bottom oil pool (2);
an oil pumping device (8) is arranged on the oil return channel (5), and the oil pumping device (8) is configured to increase the oil return capacity of the oil return channel (5).
2. The oil sump oil return structure according to claim 1, characterized in that the oil return channel (5) further comprises a cooling section (6), the position of the cooling section (6) corresponds to the position of the stator (7) of the compressor, the cooling section (6) being configured to be able to cool the stator (7) of the compressor.
3. The oil sump return structure according to claim 2, wherein the cooling section (6) is helically wound around the stator (7).
4. An oil sump return structure according to claim 3, characterized in that the cooling section (6) surrounds the stator (7) at least three times.
5. The oil sump oil return structure according to claim 1, wherein the oil return passage (5) comprises a first passage (9) provided on the upper bracket (3), and an inlet of the oil pumping device (8) communicates with the first passage (9); when the oil return channel (5) comprises the cooling section (6), the outlet of the oil pumping device (8) is communicated with the inlet of the cooling section (6); and the outlet of the cooling section (6) is communicated with the bottom oil pool (2).
6. The oil sump oil return structure according to claim 1, wherein the oil pumping device (8) includes an oil pump (10) and a transmission mechanism (11), the oil pump (10) is communicated with the oil return passage (5), the oil pump (10) is configured to provide a pumping force for the lubricating oil in the oil return passage (5), the transmission mechanism (11) is configured to dynamically couple the oil pump (10) with a crankshaft (13) of the compressor, and the transmission mechanism (11) is configured to drive the oil pump (10) to pump oil by rotation of the crankshaft (13).
7. The oil sump return structure according to claim 6, wherein the oil pump (10) comprises at least one of a gear pump, a gerotor oil pump, a vane pump, and a screw pump.
8. The oil sump oil return structure of claim 6, wherein the oil pump (10) comprises a gear pump, the gear pump is provided with a rotating shaft (12), the rotating shaft (12) is provided with a driven gear (14), the crankshaft (13) is provided with a driving gear (15), the driving gear (15) is meshed with the driven gear (14), and the crankshaft (13) drives the rotating shaft (12) to rotate.
9. The oil sump oil return structure according to claim 8, wherein the rotating shaft (12) is disposed to intersect with the crankshaft (13), the driving gear (15) is a bevel gear, and the driven gear (14) is a bevel gear.
10. The oil sump oil return structure according to claim 6, wherein the oil pump (10) comprises a gear pump, the gear pump comprises a pump body (20), a first gear (16) and a second gear (17) are arranged in the pump body (20), the first gear (16) is meshed with the second gear (17), and the pump body (20) is provided with an oil suction cavity (18) and an oil discharge cavity (19).
11. The oil sump oil return structure according to claim 6, wherein the oil pump (10) comprises a rotor type oil pump, the rotor type oil pump (10) comprises a pump body (20), and an outer rotor (24) and an inner rotor (23) are arranged in the pump body (20).
12. A compressor characterized by employing an oil sump oil return structure according to any one of claims 1 to 11.
13. An air conditioner characterized in that the oil sump oil return structure of any one of claims 1 to 11 is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120178523.0U CN214660859U (en) | 2021-01-22 | 2021-01-22 | Oil sump oil return structure, compressor and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120178523.0U CN214660859U (en) | 2021-01-22 | 2021-01-22 | Oil sump oil return structure, compressor and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214660859U true CN214660859U (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120178523.0U Active CN214660859U (en) | 2021-01-22 | 2021-01-22 | Oil sump oil return structure, compressor and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214660859U (en) |
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2021
- 2021-01-22 CN CN202120178523.0U patent/CN214660859U/en active Active
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