CN107630814B - Vortex compressor, throttling structure and air conditioner - Google Patents
Vortex compressor, throttling structure and air conditioner Download PDFInfo
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- CN107630814B CN107630814B CN201710788796.5A CN201710788796A CN107630814B CN 107630814 B CN107630814 B CN 107630814B CN 201710788796 A CN201710788796 A CN 201710788796A CN 107630814 B CN107630814 B CN 107630814B
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- 239000003921 oil Substances 0.000 claims description 199
- 239000010687 lubricating oil Substances 0.000 claims description 51
- 238000004891 communication Methods 0.000 claims description 27
- 238000005461 lubrication Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 10
- 239000003507 refrigerant Substances 0.000 description 18
- 238000007789 sealing Methods 0.000 description 14
- 230000001050 lubricating effect Effects 0.000 description 6
- 230000007774 longterm Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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Abstract
The application provides a scroll compressor, a throttling structure and an air conditioner, wherein the scroll compressor comprises: the shell comprises a shell and a machine head cover, a first air suction port is arranged on the shell, and a first air exhaust port and an exhaust oil return cavity communicated with the first air exhaust port are arranged on the machine head cover; the fixed scroll and the movable scroll are arranged in the shell, and the fixed scroll is provided with a second air suction port communicated with the first air suction port and a second air exhaust port communicated with the first air exhaust port; the motor and the rotating shaft are arranged in the shell, the motor drives the rotating shaft to rotate and drives the movable vortex plate to rotate, a first bearing is arranged in a first bearing cavity of the bracket, and a second bearing is arranged in a second bearing cavity of the shell; the scroll compressor further includes a flow passage communicating the discharge oil return chamber and the second bearing chamber. The technical scheme of the application effectively solves the problem of poor lubrication effect of the bottom bearing of the shell of the compressor in the prior art.
Description
Technical Field
The application relates to the field of air conditioners, in particular to a scroll compressor, a throttling structure and an air conditioner.
Background
Along with the development trend of new energy, the horizontal electric scroll compressor is continuously emerging in the market. The electric vortex compressor of the automobile air conditioner usually adopts an oil mist lubrication mode, and has poor lubrication effect. The following problems occur in the operation of an electric scroll compressor using oil mist lubrication:
in general, an electric scroll compressor stores a certain amount of lubricating oil in a cavity (namely an air suction low-pressure area) for accommodating a motor, and the lubrication of the compressor depends on the lubrication of a pump body and a friction pair by carrying lubricating oil through an oil storage area or carrying oil gas in the circulation of the refrigerant in the air suction process. In this regard, patent CN100344879C sets up oil guiding channel structures on the movable disc, the fixed disc and the support respectively, and communicates the back pressure chamber with the exhaust high pressure oil region, and the movable vortex disc runs a circle, and the oil guiding channels of the movable vortex disc and the support are conducted once, intermittently guides the high pressure oil to the back pressure chamber lubrication bearing and adjusts the pressure of the back pressure chamber. Another patent CN102308093a also proposes another channel structure on a movable disc, a stationary disc, and a bracket to communicate a compression chamber with a back pressure chamber, and supply air or a small amount of oil to the back pressure chamber to adjust the pressure of the back pressure chamber and improve lubrication and sealing performance in the operation of the movable scroll. While the oil guiding channel proposed by the patent CN102116298A considers that the lubrication effect of the oil guiding channel proposed by the patent CN100344879C on the bearing of the movable scroll is still poor, and an oil passage structure is improved on the movable scroll and the fixed scroll.
The above patent uses differential pressure to direct high pressure oil to the back pressure chamber to lubricate the bearings on the support and the moving disk. However, for the bearing at the bottom of the casing, only the oil mist carried in the air suction refrigerant is used for lubrication, and especially when the engine runs at a high speed, the lubrication of the bearing at the bottom of the casing is poorer. The bearing at the bottom of the shell has the problem of poor lubrication effect.
In addition, when the compressor is operated, refrigerant gas compressed and discharged through the pump body contains frozen oil, when the refrigerant gas passes through the exhaust oil separator, the frozen oil in the refrigerant is separated by the oil separator and then accumulated at the bottom of the high-pressure exhaust channel, and if the separated frozen oil cannot be returned to an oil storage area in the compressor in time, the more the oil at the bottom of the high-pressure exhaust channel is accumulated. Excessive refrigerating oil is fully accumulated on the exhaust passage and still can be carried away from the compressor by the refrigerant and enter the refrigerating system, at the moment, the separation effect of the oil separator is greatly reduced, and even the oil separation effect is lost, so that the problem of high oil discharge rate of the compressor is caused, and the refrigerating performance of the system is also deteriorated. Experiments prove that when the oil return of the high-pressure frozen oil separated from the exhaust channel in the compressor is not smooth, a large amount of the high-pressure frozen oil can accumulate at the bottom of the exhaust cavity, and the oil discharge rate of the compressor is also increased. And when the high-pressure oil separated from the exhaust channel cannot timely return to the compressed inner oil storage area and the oil discharge rate is high, the long-term operation can cause the oil shortage of the compressor, and the reliability of the compressor is affected.
Disclosure of Invention
The application aims to provide a scroll compressor, a throttling structure and an air conditioner, so as to solve the problem of poor lubrication effect of a bottom bearing of a shell of the compressor in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided a scroll compressor comprising: the shell comprises a shell and a machine head cover connected with the shell, a first air suction port is arranged on the shell, and a first air exhaust port and an exhaust oil return cavity communicated with the first air exhaust port are arranged on the machine head cover; the fixed vortex plate and the movable vortex plate are arranged in the shell, and the fixed vortex plate is provided with a second air suction port communicated with the first air suction port and a second air exhaust port communicated with the first air exhaust port; a bracket arranged at one side of the movable vortex plate facing the first air suction port; the motor and the rotating shaft are arranged in the shell, the motor drives the rotating shaft to rotate, the first end of the rotating shaft penetrates through the support and drives the movable vortex plate to rotate, a first bearing is arranged between the first end of the rotating shaft and the support, the first bearing is accommodated in a first bearing cavity of the support, a second bearing is arranged between the second end of the rotating shaft and the shell, and the second bearing is accommodated in a second bearing cavity of the shell; the scroll compressor further comprises a flow passage which is communicated with the exhaust oil return cavity and the second bearing cavity, the flow passage comprises a first drainage channel arranged in the machine head cover, a second drainage channel arranged on the fixed scroll, a third drainage channel communicated with the second drainage channel and the first bearing cavity and a fourth drainage channel arranged in the rotating shaft, and the fourth drainage channel is communicated with the first bearing cavity and the second bearing cavity.
Further, a first communication channel is arranged on the bracket, and the third drainage channel is connected with the first bearing cavity through the first communication channel.
Further, a third drainage channel is formed in the stent.
Further, a portion of the third drainage channel is formed in the holder, and the remaining portion is formed in the drainage tube.
Further, a third bearing cavity is formed in the movable scroll, and the scroll compressor further comprises a fifth drainage channel communicated with the third bearing cavity and the circulation channel.
Further, a portion of the fifth drainage channel is disposed in the bracket and in communication with the flow passage, and a portion of the fifth drainage channel is disposed in the orbiting scroll.
Further, a fifth drain passage is provided in the orbiting scroll and communicates with the through-flow passage.
Further, a fifth drainage channel is disposed in the bracket and communicates with the flow passage.
Further, a first sealing piece is arranged between the support and the movable scroll, a second communication channel is arranged on the first sealing piece, and the flow passage is communicated with the fifth drainage channel through the second communication channel.
Further, a throttling component is arranged in the first drainage channel and/or the fifth drainage channel so as to reduce the flow rate of lubricating oil in the first drainage channel and/or the fifth drainage channel.
According to another aspect of the present application, there is provided a throttle structure including: the device comprises a head part, a thread section and a connecting section arranged between the head part and the thread section, wherein the outer diameter of the thread section is smaller than the radial dimension of the head part; the first end of the oil hole extends to the end face of the head, and the second end of the oil hole extends to the circumferential surface of the connecting section.
Further, the oil holes include a third radial oil hole extending in the radial direction of the connecting section and a fifth axial oil hole extending in the axial direction of the head, and the third radial oil hole and the fifth axial oil hole are communicated.
Further, the head is cylindrical.
According to another aspect of the present application, there is provided a scroll compressor comprising: the shell comprises a shell and a machine head cover connected with the shell, a first air suction port is arranged on the shell, and a first air exhaust port and an exhaust oil return cavity communicated with the first air exhaust port are arranged on the machine head cover; the fixed vortex plate and the movable vortex plate are arranged in the shell, and the fixed vortex plate is provided with a second air suction port communicated with the first air suction port and a second air exhaust port communicated with the first air exhaust port; a bracket arranged at one side of the movable vortex plate facing the first air suction port; the motor and the rotating shaft are arranged in the shell, the motor drives the rotating shaft to rotate, the first end of the rotating shaft penetrates through the support and drives the movable vortex plate to rotate, a first bearing is arranged between the first end of the rotating shaft and the support, the first bearing is accommodated in a first bearing cavity of the support, a second bearing is arranged between the second end of the rotating shaft and the shell, and the second bearing is accommodated in a second bearing cavity of the shell; the scroll compressor further comprises a flow passage which is communicated with the exhaust oil return cavity and the second bearing cavity, the flow passage comprises a first flow guide channel arranged in the machine head cover, a second flow guide channel arranged on the fixed scroll, a third flow guide channel which is communicated with the second flow guide channel and the first bearing cavity and a fourth flow guide channel arranged in the rotating shaft, the fourth flow guide channel is communicated with the first bearing cavity and the second bearing cavity, a throttling structure is arranged in the first flow guide channel and/or the third flow guide channel, and the throttling structure is the throttling structure.
According to another aspect of the present application, there is provided an air conditioner including a compressor, which is the above-described scroll compressor.
Further, the air conditioner is a vehicle-mounted air conditioner.
By applying the technical scheme of the application, the lubricating oil in the shell flows in the compressor along with the refrigerant entering the scroll compressor, and finally is converged in the exhaust oil return cavity. The exhaust oil return cavity of the scroll compressor is communicated with the second bearing cavity through the communication channel, so that lubricating oil in the exhaust oil return cavity can flow back to the second bearing cavity, the lubricating oil quantity in the second bearing cavity is effectively ensured, the lubricating effect of the second bearing is further ensured, and the problem of poor lubrication of the second bearing is solved. Meanwhile, the through-flow channel comprises a first drainage channel, a second drainage channel and a third drainage channel which are communicated with the exhaust oil return cavity and the first bearing cavity, and a fourth drainage channel which is communicated with the first bearing cavity and the second bearing cavity. The through-flow channel is used for effectively guiding the lubricating oil in the exhaust oil return cavity to the second bearing and the first bearing, so that the defect that the lubricating oil is concentrated in the exhaust oil return cavity to cause the shortage of the lubricating oil between the motor and other structures can be avoided, the problem that the lubricating oil in the compressor is difficult to circulate and return oil is solved, and the reliability of long-term operation of the compressor is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a schematic cross-sectional structural view of an embodiment one of a scroll compressor in accordance with the present application;
FIG. 2 illustrates a first angular structural schematic view of a bracket of the scroll compressor of FIG. 1;
FIG. 3 shows a second angular structural schematic view of the bracket of FIG. 2;
FIG. 4 illustrates an exploded view of the bracket, first seal, and orbiting scroll of the scroll compressor of FIG. 1;
fig. 5 shows a schematic cross-sectional structure of a second embodiment of a scroll compressor according to the present application;
FIG. 6 illustrates an exploded view of the bracket, first seal and orbiting scroll of the scroll compressor of FIG. 5;
FIG. 7 shows a first structural schematic of the seal of FIG. 6;
FIG. 8 shows a second structural schematic of the seal of FIG. 6;
FIG. 9 shows a schematic cross-sectional construction of a third embodiment of a scroll compressor according to the present application;
FIG. 10 shows a schematic cross-sectional structure of a fourth embodiment of a scroll compressor according to the present application;
FIG. 11 shows a schematic structural view of an embodiment of a throttle structure according to the present application; and
fig. 12 shows a schematic sectional structure of the throttle structure of fig. 11.
Wherein the above figures include the following reference numerals:
1. a housing; 2. a camera cover; 201. an exhaust passage; 202. a first drainage channel; 203. a first exhaust port; 3. an oil-gas separator; 4. a throttle member; 401. a fifth axial oil hole; 402. a third radial oil hole; 403. a threaded section; 404. a tooth bottom; 405. a tooth top; 406. a head; 407. a connection section; 5a, a second seal; 5b, a third seal; 5c, a fourth seal; 5d, a fifth seal; 6. a fixed scroll; 601. a second drainage channel; 602. a second exhaust port; 7. an orbiting scroll; 701. a third axial oil hole; 702. a second radial oil hole; 703. a fourth axial oil hole; 704. a medium pressure hole; 8. a first seal; 801. a through hole; 802. a through hole; 803. an oil groove; 9. a bracket; 901. a first axial oil hole; 902. a first radial oil hole; 903. a second axial oil hole; 904. a third drainage channel; 905. an axial oil passage; 906. a radial oil passage; 907. a fourth radial oil hole; 10. a first bearing; 10a, an inner retainer ring; 11. a cover plate; 11a, through holes; 11b, through holes; 12. a rotating shaft; 12a, a fifth radial oil hole; 12b, a sixth axial oil hole; 12c, a sixth radial oil hole; 13. a second bearing; 14. a motor; 15. an eccentric block; 16. a pin shaft; 17. a drainage tube; A. exhausting the oil return cavity; B. a low pressure oil storage area; ps, aspiration low pressure region; pm, medium pressure back pressure zone; pd, exhaust high pressure zone.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
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.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Embodiment one:
as shown in fig. 1, the scroll compressor of the first embodiment includes a housing, a fixed scroll 6, an orbiting scroll 7, a bracket 9, a motor 14, and a rotating shaft 12. The casing comprises a casing 1 and a machine head cover 2 connected with the casing 1, wherein a first air suction port is arranged on the casing 1, and a first air exhaust port 203 and an exhaust oil return cavity A communicated with the first air exhaust port 203 are arranged on the machine head cover 2. The fixed scroll 6 and the movable scroll 7 are provided in the casing 1, and the fixed scroll 6 is provided with a second air inlet communicating with the first air inlet and a second air outlet 602 communicating with the first air outlet. The bracket 9 is provided at a side of the orbiting scroll 7 facing the first suction port. A motor 14 and a rotating shaft 12 are also arranged in the casing 1, the motor 14 drives the rotating shaft 12 to rotate, and a first end of the rotating shaft 12 penetrates into the bracket 9 and drives the movable scroll 7 to rotate. A first bearing 10 is arranged between the first end of the rotating shaft 12 and the bracket 9, the first bearing 10 being accommodated in a first bearing cavity of the bracket 9, a second bearing 13 being arranged between the second end of the rotating shaft 12 and the housing 1, the second bearing 13 being accommodated in a second bearing cavity of the housing 1. The scroll compressor further comprises a flow passage for communicating the exhaust oil return cavity A with the second bearing cavity, wherein the flow passage comprises a first flow guide channel 202 arranged in the machine head cover 2, a second flow guide channel 601 arranged on the fixed scroll 6, a third flow guide channel 904 for communicating the second flow guide channel 601 with the first bearing cavity and a fourth flow guide channel arranged in the rotating shaft 12, and the fourth flow guide channel is communicated with the first bearing cavity and the second bearing cavity.
By applying the technical scheme of the embodiment, the lubricating oil in the shell flows in the compressor along with the refrigerant entering the scroll compressor, and finally is converged in the exhaust oil return cavity A. The exhaust oil return cavity A and the second bearing cavity of the scroll compressor are communicated through a communication channel, so that lubricating oil in the exhaust oil return cavity A can flow back to the second bearing cavity, the lubricating oil quantity in the second bearing cavity is effectively ensured, the lubricating effect of the second bearing 13 is further ensured, and the problem of poor lubrication of the second bearing 13 is solved. Meanwhile, the through-flow channel includes a first drainage channel 202, a second drainage channel 601 and a third drainage channel 904 which communicate the exhaust oil return chamber a and the first bearing chamber, and a fourth drainage channel which communicates the first bearing chamber and the second bearing chamber. The through-flow channel is used for effectively guiding the lubricating oil in the exhaust oil return cavity A to the second bearing 13 and the first bearing 10, so that the defect that the lubricating oil is concentrated in the exhaust oil return cavity A to cause the shortage of the lubricating oil between the motor 14 and other structures can be avoided, the problem that the lubricating oil in the compressor is difficult to circulate and return oil is solved, and the reliability of long-term operation of the compressor is improved.
Specifically, as shown in fig. 1, a first bearing cavity is provided on the bracket 9 of the present embodiment, an outer ring of the first bearing 10 is interference-fitted in the first bearing cavity, an inner ring 10a of the first bearing 10 is interference-fitted on the rotating shaft 12, and a first communication channel is provided on the bracket 9 of the present embodiment in order to allow lubricating oil to flow into the first bearing 10. As shown in fig. 1 and 2, the first communication passage of the present embodiment includes an axial oil passage 905 provided in the axial direction of the bracket 9 and a radial oil passage 906 provided in the radial direction of the bracket 9. Wherein the axial oil passage 905 is provided on the bearing hole side wall of the bracket 9, the radial oil passage 906 is provided at the bearing hole bottom of the bracket 9, and the radial oil passage 906 extends at least between the inner retainer ring 10a and the outer retainer ring of the first bearing 10. The first drainage channel is connected with the first bearing cavity through the first communication channel, and under the action of pressure difference, lubricating oil in the exhaust oil return cavity A flows into the first bearing 10 through the first communication channel and flows to the second bearing cavity through the first bearing cavity.
Specifically, as shown in fig. 1 and 4, the third drainage channel 904 of the present embodiment is formed in the bracket 9 and is disposed obliquely so as to communicate the port of the second drainage channel 601 with the first bearing chamber.
Further, as shown in fig. 1, a cover plate 11 is further disposed on the bracket 9 of the present embodiment, and the cover plate 11, the rotating shaft 12, and the bracket 9 form a first bearing cavity for accommodating the first bearing 10. The cover plate 11 is provided with a through hole 11a to communicate the first bearing chamber with the suction low pressure region Ps of the motor accommodation chamber in the casing 1, so that the first bearing chamber is in a low pressure state.
The fourth drainage channel arranged on the rotating shaft 12 comprises a fifth radial oil hole 12a, a sixth radial oil hole 12c and a sixth axial oil hole 12B which are communicated, and the lubricating oil in the first bearing cavity can reach the second bearing cavity 13 in the second bearing cavity at the bottom of the casing 1 through the fifth radial oil hole 12a, the sixth axial oil hole 12B and the sixth radial oil hole 12c in the rotating shaft 12 and then flow back to the low-pressure oil storage area B in the casing 1.
Further, as shown in fig. 1, the movable scroll 7 of the present embodiment is provided with a third bearing cavity, and the scroll compressor further includes a fifth drainage channel communicating the third bearing cavity and the circulation channel, so that the lubricating oil in the exhaust oil return cavity a can lubricate the third bearing on the movable scroll 7 through the fifth drainage channel.
Specifically, the first end of the rotating shaft 12 of the present embodiment is further provided with a pin 16, which is inserted into a pin hole of the eccentric block 15, and the outer circumferential shaft end of the eccentric block 15 is inserted into a third bearing of the orbiting scroll 7. The pin shaft 16 and the rotating shaft 12 are eccentrically arranged to form a crankshaft, the motor 14 drives the eccentric block 15 to rotate through the rotating shaft 12 and the pin shaft 16, and the vortex plate 7 is moved to realize shaft revolution under the action of the pin shaft 16, the eccentric block 15, the third bearing and the rotation preventing mechanism. At this time, the scroll teeth of the fixed scroll 6 and the scroll teeth of the movable scroll 7 are engaged with each other, a crescent compression cavity with different pressure is formed inside the movable scroll, under the continuous driving of the motor 14, the second air suction port on the fixed scroll 6 continuously sucks the low-pressure refrigerant gas carrying a certain lubricant from the air suction low-pressure area Ps in the housing 1 containing the motor 14, the low-pressure refrigerant gas becomes high-temperature high-pressure gas after being compressed by the movable scroll, and finally the gas is discharged from the second air discharge port 602 of the fixed scroll 6 into the closed cavity between the back of the fixed scroll 6 and the machine head cover 2, so as to form an air discharge high-pressure area Pd.
The refrigerant gas in the high-pressure exhaust area Pd enters the exhaust channel 201 arranged on the machine head cover 2 through the first exhaust port 203 on the machine head cover 2, the exhaust channel 201 is provided with the oil-gas separator 3, the refrigerant gas compressed and discharged through the movable vortex plate contains lubricating oil, most of the lubricating oil in the refrigerant is separated after passing through the oil-gas separator 3, and a small part of the lubricating oil is carried away from the compressor by the refrigerant and enters the refrigeration cycle system. The lubricant oil separated by the oil separator 3 accumulates in the exhaust oil return chamber a at the bottom of the exhaust passage 201, and the more the accumulation becomes. If the exhaust oil return cavity A is not provided with an oil circulation return channel, oil can not flow back to the low-pressure oil storage area B in the shell 1 in time and still can be carried away from the compressor by refrigerant gas, and the problem of high oil discharge rate of the compressor can be caused. The five drainage channels in the embodiment lead the lubricating oil in the exhaust oil return cavity A back to the three bearing cavities, so that the lubricating oil forms a circulation in the compressor shell, namely, the lubricating effect of the three bearings is ensured, and the problems that the lubricating oil in the exhaust oil return cavity A is excessive and leaves the compressor along with refrigerant gas, so that the lubricating oil in the compressor is reduced are also avoided.
Specifically, as shown in fig. 1 to 4, a part of the fifth drainage passage of the present embodiment is provided in the bracket 9 and communicates with the circulation passage, and a part of the fifth drainage passage is provided in the orbiting scroll 7. Due to process limitations, the portion of the fifth drainage channel in the present embodiment in the bracket 9 includes a first radial oil hole 902 extending in the radial direction of the bracket 9, and a first axial oil hole 901 and a second axial oil hole 903 extending in the axial direction of the bracket 9, wherein the first axial oil hole 901 communicates with the second drainage channel 601 and the first radial oil hole 902 on the fixed scroll 6, the first radial oil hole 902 communicates with the first axial oil hole 901 and the third drainage channel 904 on the bracket 9, and the second axial oil hole 903 opens to the portion of the fifth drainage channel in the orbiting scroll 7. The portion of the fifth drainage passage in the orbiting scroll 7 includes third and fourth axial oil holes 701 and 703 extending in the axial direction of the orbiting scroll 7 and a second radial oil hole 702 extending in the radial direction of the orbiting scroll 7. The third axial oil hole 701 communicates with the second axial oil hole 903 and the second radial oil hole 702, and the fourth axial oil hole 703 communicates with the third bearing cavity and the second radial oil hole 702 and is directed between the inner retainer ring and the outer retainer ring of the third bearing, so as to improve the lubrication effect.
As the motor 14 rotates, the orbiting scroll 7 revolves one revolution, and the fifth drainage passage of the bracket portion can communicate once with the fifth drainage passage of the orbiting scroll portion. The intermittent oil guiding mode can provide proper oil quantity for the third bearing cavity, meets the lubricating requirement of each friction pair, and does not cause excessive oil accumulation of the third bearing cavity due to continuous oil guiding.
Further, as shown in fig. 1 and 4, a first seal 8 is provided between the bracket 9 and the orbiting scroll 7, a second communication passage is provided on the first seal 8, and the through-flow passage communicates with the fifth drainage passage through the second communication passage. Specifically, as shown in fig. 1 to 4, the second communication passage of the present embodiment includes a through hole 801 that communicates the second drainage passage 601 and the first axial oil hole 901, and a through hole 802 that communicates the second axial oil hole 903 and the third axial oil hole 701.
Further, as shown in fig. 1, the first drainage channel 202 and the third drainage channel 904 in this embodiment are provided with the throttling component 4, and a tiny and roundabout throttling channel can be formed between the throttling component 4 and the side walls of the first drainage channel 202 and the third drainage channel 904, so as to reduce the flow velocity of the lubricating oil in the first drainage channel 202 and the third drainage channel 904, avoid the rapid drop of the oil level of the exhaust oil return cavity a caused by too fast flow velocity of the lubricating oil in the overflow channel, and further cause the high-pressure gas of the exhaust channel 201 to enter the medium-pressure back pressure region Pm and the suction low pressure region Ps through the overflow channel, so as to cause the problem of blowby gas in different cavities. The medium-pressure back pressure region Pm is a cavity formed between a cavity for accommodating the eccentric block 15 in the upper portion of the bracket 9 and the back surface of the orbiting scroll 7.
As shown in fig. 1 and 4, the movable scroll 7 of the present embodiment is further provided with a middle pressure hole 704, and during the movement of the movable scroll 7, the middle pressure (the pressure between the suction pressure and the discharge pressure) in the compression chamber of the movable scroll is intermittently led to the middle pressure back pressure region Pm through the middle pressure hole 704, so as to realize that the movable scroll 7 floats upwards and clings to the end face of the scroll teeth of the fixed scroll 6, and at this time, the wear-resistant first sealing member 8 makes the first sealing member 8 always adhere to the end face of the bracket 9 and the back face of the movable scroll 7 by using the elasticity of the first sealing member 8, so as to maintain contact tightness.
Alternatively, the throttle member 4 may be selectively provided in five drainage channels according to the diameter size of the drainage channels.
Under the action of the pressure difference force of the high pressure area and the low pressure area, the lubricating oil of the exhaust oil return cavity A passes through the first drainage channel 202, the second drainage channel 601 and the throttling part 4 and then reaches the fifth drainage channel and the third drainage channel 904 which are used for shunting towards the medium pressure area and the low pressure area.
As shown in fig. 1 and 4, the flow direction of the medium pressure area drainage channel, the high pressure oil reaches the through hole 801 of the first sealing element 8 and then enters the first radial oil hole 902 through the first axial oil hole 901 on the bracket 9, the follow-up vortex plate 7 continuously moves eccentrically, and the lubricating oil passes through the through hole 802 and intermittently enters the third bearing cavity along the fifth drainage channel to lubricate the third bearing. When the second axial oil hole 903 is offset from the third axial oil hole 701, a small portion of the lubricating oil may accumulate in the accommodating chamber of the eccentric mass 15, and as the rotating shaft 12 rotates, the eccentric mass 15 may agitate the accumulated lubricating oil and fall onto the anti-rotation mechanism, lubricating the anti-rotation mechanism.
As shown in fig. 1 and fig. 4, the high pressure oil reaches the through hole 801 of the first sealing member 8 and enters the third drainage channel 904 through the first axial oil hole 901 on the bracket 9, and meanwhile, the throttling component 4 may be further disposed in the third drainage channel 904 to further throttle the lubrication oil flowing to the low pressure region Ps. The third drain passage 904 on the intake bracket 9 and the lubricating oil throttled by the throttle member 4 enter the first bearing chamber along the axial oil passage 905 and the radial oil passage 906 to lubricate the first bearing 10.
The lubricating oil passing through the first bearing chamber enters the second bearing chamber through the fourth drainage channel to lubricate the second bearing 13 and finally flows to the low-pressure oil reservoir B.
The scroll compressor of the present embodiment is further provided with a sealing structure between portions of the above-described structures so that lubricating oil or refrigerant gas flows in the compressor in a predetermined path. As shown in fig. 1, the seal structure of the present embodiment includes:
a second sealing member 5a is arranged between the machine head cover 2 and the fixed scroll 6, and the second sealing member 5a is arranged at the joint of the first drainage channel 202 and the second drainage channel 601 in a surrounding manner.
And a third sealing member 5b arranged on the joint surface of the back surface of the fixed scroll 6 and the end surface of the machine head cover 2, wherein the third sealing member 5b seals the cavity between the back surface of the fixed scroll 6 and the machine head cover 2 to form an exhaust high pressure area Pd. The pressure difference force between the three areas is used as power, and the drainage channel is combined to realize the oil guiding lubrication or the oil circulation return of the lubricating oil of the compressor.
A fourth seal 5c provided at the bottom of the first bearing chamber to seal the medium-pressure back pressure region Pm.
The fifth sealing element 5d embedded in the cover plate 11 is an oil retaining ring, so that lubricating oil is prevented from flowing back to the low-pressure oil storage area B in the casing 1 from a gap between the cover plate 11 and the rotating shaft 12 too quickly, a certain amount of lubricating oil is stored in the first bearing cavity, the first bearing 10 is ensured to be fully lubricated, and excessive lubricating oil can flow back to the low-pressure oil storage area B in the casing 1 from the through hole 11 a.
Embodiment two:
the scroll compressor of the second embodiment mainly changes the arrangement of the fifth drainage passage and the arrangement of the second communication passage on the first seal member 8, and specifically, as shown in fig. 5 and 6, the third drainage passage 904 of the second embodiment is still formed in the bracket 9 and is provided obliquely so as to communicate the port of the second drainage passage 601 with the first bearing chamber. The second communication passage on the first seal member 8 includes, in addition to the through hole 801 and the through hole 802, an oil groove 803 that communicates the through hole 801 and the through hole 802 to fully dispose the fifth drainage passage in the orbiting scroll 7 and to communicate the through-flow passage with the fifth drainage passage through the second communication passage.
As shown in fig. 7 and 8, the oil groove 803 may take the shortest distance between the through hole 801 and the through hole 802 to communicate the through hole 801 and the through hole 802. The oil groove 803 may be formed to extend around the first seal member 8 around the through hole 801 and to communicate the through hole 801 with the through hole 802.
Embodiment III:
the scroll compressor of the third embodiment mainly changes the arrangement of the third and fifth drainage channels and adaptively changes the arrangement of the second communication channel on the first seal member 8, and specifically, as shown in fig. 9, reduces the material consumption of the bracket 9, replaces a part of the third drainage channel originally provided in the bracket 9 by the drainage tube 17, and another part of the third drainage channel is still formed in the bracket 9 to communicate the second drainage channel 601 with the drainage tube 17. Specifically, the third drain passage provided in the bracket 9 includes a first axial oil hole 901 and a fourth radial oil hole 907. The fifth drainage passage is provided entirely in the bracket 9, and includes a first axial oil hole 901 and a first radial oil hole 902, and the throttle member 4 is provided in the first radial oil hole 902. So that the fifth drainage channel can continuously inject lubricating oil into the third bearing cavity.
The third drainage channel and the fifth drainage channel share a section of the first axial oil hole 901, and accordingly the second communication channel on the first seal 8 includes only one through hole corresponding to the first axial oil hole 901.
Embodiment four:
the scroll compressor of the fourth embodiment changes the arrangement of the draft tube 17 on the basis of the third embodiment, as shown in fig. 10, the axial oil passage 905, the radial oil passage 906 and the fourth radial oil hole 907 on the bracket 9 are eliminated, and instead, the cover plate 11 is provided with the through hole 11b and the bottom end of the draft tube 17 is inserted into the through hole 11b, so as to realize the injection of the lubricating oil into the first bearing cavity.
The present application also provides a throttle structure, as shown in fig. 11, where the throttle structure of the present embodiment includes: head 406 (outer diameter d 2), screw section 403, connecting section 407 (outer diameter d 3) and oil hole. Wherein the connecting section 407 is disposed between the head 406 and the threaded section 403, the threaded section 403 having an outer diameter smaller than the radial dimension of the head 406. An oil hole is provided in the head 406 and the connecting section 407, a first end of the oil hole extends onto an end face of the head 406, and a second end of the oil hole extends onto a circumferential surface of the connecting section 407.
The head 406 of the throttling structure of this embodiment is used to fix the throttling structure when inserted into a pipeline, and a small passage is formed between the pipe wall and the threaded section 403, and the path length of fluid flow is prolonged, so as to play a role in throttling.
Specifically, as shown in fig. 12, the oil hole of the present embodiment includes a third radial oil hole 402 extending in the radial direction of the connecting section 407 and a fifth axial oil hole 401 extending in the axial direction of the head 406, the third radial oil hole 402 and the fifth axial oil hole 401 being in communication, which facilitates the processing of the throttle structure.
The thread groove of the thread section 403 may be triangular or trapezoidal, and the cross-sectional dimensions (i.e. small diameter D1 of the tooth bottom 404, large diameter D of the tooth top 405, and pitch P) and the aperture D1 of the fifth axial oil hole 401 and the aperture D2 of the third radial oil hole 402 may be designed according to the amount of lubrication oil accumulated in the actual compressor discharge oil return chamber a and the amount of oil or return oil supplied to the friction pair (the best design dimension may be selected according to the experimental conditions of the actual compressor). The connection section 407 may be an optical axis section or a threaded section. The head 406 can be fixedly connected with the pipe wall in a mode of small interference or screw thread structure fastening glue. The aperture D2 of the third radial oil hole 402 is generally smaller than the aperture D1 of the fifth axial oil hole 401.
Preferably, the diameter of the third radial oil hole 402 may be selected within a range of 0.1mm to 1mm, and the large diameter d of the crest 405 of the thread section 403 of the throttling structure is 0.03mm to 0.1mm smaller than the inner diameter of the pipe.
Preferably, the throttle structure is a plastic or metal cylinder.
The throttle member 4 in the scroll compressor of each of the above embodiments may use the throttle structure of the present embodiment. Of course, a throttle structure not shown in other figures may be used as long as a throttle effect can be achieved.
Through the above drainage channel and the throttling structure, the high-pressure oil of the exhaust oil return cavity a on the head cover 2 passes through the first drainage channel 202, throttles along the thread section 403 of the throttling structure, passes through the third radial oil hole 402 and the fifth axial oil hole 401, and then enters the third drainage channel and the fifth drainage channel along the second drainage channel 601 on the fixed scroll 6.
The present application also provides an air conditioner (not shown in the drawings) according to the present embodiment, which includes a compressor, which is the scroll compressor described above. The air conditioner of the embodiment has the characteristics of reliable operation and long service life.
Further, the air conditioner of the present embodiment is a vehicle-mounted air conditioner.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
the lubricating oil in the shell flows in the compressor along with the refrigerant entering the scroll compressor, and finally converges in the exhaust oil return cavity. The exhaust oil return cavity of the scroll compressor is communicated with the second bearing cavity through the communication channel, so that lubricating oil in the exhaust oil return cavity can flow back to the second bearing cavity, the lubricating oil quantity in the second bearing cavity is effectively ensured, the lubricating effect of the second bearing is further ensured, and the problem of poor lubrication of the second bearing is solved. Meanwhile, the through-flow channel comprises a first drainage channel, a second drainage channel and a third drainage channel which are communicated with the exhaust oil return cavity and the first bearing cavity, and a fourth drainage channel which is communicated with the first bearing cavity and the second bearing cavity. The through-flow channel is used for effectively guiding the lubricating oil in the exhaust oil return cavity to the second bearing and the first bearing, so that the defect that the lubricating oil is concentrated in the exhaust oil return cavity to cause the shortage of the lubricating oil between the motor and other structures can be avoided, the problem that the lubricating oil in the compressor is difficult to circulate and return oil is solved, and the reliability of long-term operation of the compressor is improved.
In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (11)
1. A scroll compressor, comprising:
the device comprises a shell, wherein the shell comprises a shell (1) and a machine head cover (2) connected with the shell (1), a first air suction port is arranged on the shell (1), and a first air exhaust port (203) and an air exhaust return cavity (A) communicated with the first air exhaust port (203) are arranged on the machine head cover (2);
a fixed scroll (6) and an movable scroll (7) which are arranged in the shell (1), wherein a second air suction port communicated with the first air suction port and a second air exhaust port (602) communicated with the first air exhaust port are arranged on the fixed scroll (6);
a bracket (9) arranged on one side of the movable scroll (7) facing the first air suction port;
the motor (14) and the rotating shaft (12) are arranged in the shell (1), the motor (14) drives the rotating shaft (12) to rotate, a first end of the rotating shaft (12) penetrates into the support (9) and drives the movable scroll (7) to rotate, a first bearing (10) is arranged between the first end of the rotating shaft (12) and the support (9), the first bearing (10) is accommodated in a first bearing cavity of the support (9), a second bearing (13) is arranged between a second end of the rotating shaft (12) and the shell (1), and the second bearing (13) is accommodated in a second bearing cavity of the shell (1);
the scroll compressor further comprises a flow passage which is communicated with the exhaust oil return cavity (A) and the second bearing cavity, wherein the flow passage comprises a first drainage channel (202) arranged in the machine head cover (2), a second drainage channel (601) arranged on the fixed scroll (6), a third drainage channel (904) which is communicated with the second drainage channel (601) and the first bearing cavity, and a fourth drainage channel arranged in the rotating shaft (12), and the fourth drainage channel is communicated with the first bearing cavity and the second bearing cavity;
a third bearing cavity is formed in the movable scroll (7), and the scroll compressor further comprises a fifth drainage channel communicated with the third bearing cavity and the flow passage;
a part of the fifth drainage channel is arranged in the bracket (9) and communicated with the flow passage, and a part of the fifth drainage channel is arranged in the movable scroll (7);
the fifth drainage channel is arranged in the bracket (9) and comprises a first radial oil hole (902) extending along the radial direction of the bracket (9), and a first axial oil hole (901) and a second axial oil hole (903) extending along the axial direction of the bracket (9);
the portion of the fifth drainage channel in the movable scroll (7) comprises a third axial oil hole (701) and a fourth axial oil hole (703) which extend along the axial direction of the movable scroll (7), and a second radial oil hole (702) which extends along the radial direction of the movable scroll (7).
2. A scroll compressor according to claim 1, wherein the bracket (9) is provided with a first communication channel, and the third drainage channel (904) is connected to the first bearing chamber through the first communication channel.
3. The scroll compressor according to claim 1, wherein the third drainage channel (904) is formed within the bracket (9).
4. A scroll compressor according to claim 1, wherein part of the third drainage channel (904) is formed in the bracket (9) and the remaining part is formed in the drainage tube (17).
5. A scroll compressor according to claim 1, wherein a first seal (8) is provided between the bracket (9) and the orbiting scroll (7), a second communication channel being provided on the first seal (8), the flow-through channel being in communication with the fifth drainage channel via the second communication channel.
6. A scroll compressor according to claim 1, wherein a throttle member (4) is provided in the first and/or fifth drain passage to reduce the flow rate of lubricating oil in the first and/or fifth drain passage.
7. A scroll compressor according to claim 6, wherein the throttle member (4) comprises:
-a head (406), -a threaded section (403), -a connecting section (407) arranged between the head (406) and the threaded section (403), the external diameter of the threaded section (403) being smaller than the radial dimension of the head (406);
an oil hole is provided in the head portion (406) and the connecting section (407), a first end of the oil hole extends onto an end face of the head portion (406), and a second end of the oil hole extends onto a circumferential surface of the connecting section (407).
8. The scroll compressor according to claim 7, wherein the oil holes include a third radial oil hole (402) extending in a radial direction of the connecting section (407) and a fifth axial oil hole (401) extending in an axial direction of the head portion (406), the third radial oil hole (402) and the fifth axial oil hole (401) being in communication.
9. The scroll compressor of claim 7, wherein the head (406) is cylindrical.
10. An air conditioner comprising a compressor, wherein the compressor is the scroll compressor according to any one of claims 1 to 9.
11. The air conditioner of claim 10, wherein the air conditioner is a vehicle-mounted air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788796.5A CN107630814B (en) | 2017-09-04 | 2017-09-04 | Vortex compressor, throttling structure and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710788796.5A CN107630814B (en) | 2017-09-04 | 2017-09-04 | Vortex compressor, throttling structure and air conditioner |
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| Publication Number | Publication Date |
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| CN107630814A CN107630814A (en) | 2018-01-26 |
| CN107630814B true CN107630814B (en) | 2023-10-03 |
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| DE102019108417A1 (en) * | 2019-04-01 | 2020-10-01 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Scroll Compressor |
| CN112879303A (en) * | 2019-11-29 | 2021-06-01 | 比亚迪股份有限公司 | Scroll compressor having a plurality of scroll members |
| CN111648962A (en) * | 2020-07-07 | 2020-09-11 | 苏州英华特涡旋技术股份有限公司 | An oil circulation structure of a horizontal scroll compressor |
| CN112253465B (en) * | 2020-11-13 | 2023-05-26 | 华域三电汽车空调有限公司 | Compressor oil return structure and compressor |
| CN112412801A (en) * | 2020-12-03 | 2021-02-26 | 珠海格力节能环保制冷技术研究中心有限公司 | An oil circuit structure, horizontal scroll compressor and refrigeration equipment |
| CN113266564B (en) * | 2021-06-21 | 2025-04-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor oil supply structure and scroll compressor |
| CN113482919B (en) * | 2021-08-05 | 2023-01-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Scroll compressor's seal structure, scroll compressor and air conditioner |
| CN113982940A (en) * | 2021-09-10 | 2022-01-28 | 苏州中成新能源科技股份有限公司 | High-efficient lubricated oil circuit structure |
| CN114215757B (en) * | 2021-12-17 | 2022-11-15 | 珠海格力电器股份有限公司 | Oil return structure, compressor and air conditioner |
| CN116412137A (en) * | 2023-04-10 | 2023-07-11 | 珠海格力电器股份有限公司 | Scroll compressor and air conditioner using same |
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