CN107893766B - Oil return structure of compressor and compressor - Google Patents
Oil return structure of compressor and compressor Download PDFInfo
- Publication number
- CN107893766B CN107893766B CN201711091936.XA CN201711091936A CN107893766B CN 107893766 B CN107893766 B CN 107893766B CN 201711091936 A CN201711091936 A CN 201711091936A CN 107893766 B CN107893766 B CN 107893766B
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- CN
- China
- Prior art keywords
- channel
- oil return
- stator
- exhaust
- circulation
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- 239000003921 oil Substances 0.000 claims abstract description 89
- 239000010687 lubricating oil Substances 0.000 claims abstract description 18
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- 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
- F04C29/028—Means for improving or restricting lubricant flow
Abstract
The invention provides an oil return structure of a compressor and the compressor, wherein the oil return structure of the compressor comprises a stator; the stator is a columnar body, the two ends of the stator are a first end face and a second end face respectively, and a circulation channel, an exhaust channel and an oil return channel are arranged on the stator; the exhaust channel forms an exhaust port on the side surface of the stator, the circulation channel is communicated with the exhaust channel, and an air suction port is formed on the first end surface, and when the air flow flows along the side surface of the stator from the second end surface to the first end surface, negative pressure can be formed in the exhaust channel; the oil return passage may be in communication with the exhaust passage and may form an oil return port on the second end surface. The invention has the advantages of reasonable design and simple structure, is favorable for the lubricating oil at the upper end of the stator to flow back into the oil pool of the compressor, ensures that the oil pool can keep sufficient oil quantity, further ensures the lubricating effect of the pump body and improves the reliability of the compressor.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an oil return structure of a compressor and the compressor.
Background
At present, rotary compressors are mostly designed into high back pressure structures, after the compressors run stably, high-temperature and high-pressure gas compressed by a working cavity is directly discharged between a silencer and the lower end of a stator, flows to a cavity between the upper end of the stator and an upper cover through a flow hole of the stator, a gap between a stator and a rotor and a gap between a stator trimming edge and a shell, is influenced by the exhaust channels, the gas pressure at the lower end of the stator is necessarily greater than the gas pressure at the upper end of the stator, and is unfavorable for lubricating oil at the upper end of the stator to circulate to an oil pool at the bottom of the compressor, so that pump body lubrication is influenced, and the reliability of the compressor is reduced.
Disclosure of Invention
The invention mainly aims to provide an oil return structure of a compressor and the compressor, which are beneficial to the return of lubricating oil at the upper end of a stator to an oil pool of the compressor, so that sufficient oil quantity can be maintained in the oil pool, further the lubricating effect of a pump body is ensured, and the reliability of the compressor is improved.
The invention provides an oil return structure of a compressor, which comprises a stator;
the stator is a columnar body, the two ends of the stator are a first end face and a second end face respectively, and a circulation channel, an exhaust channel and an oil return channel are arranged on the stator;
the exhaust passage forms an exhaust port on a side surface of the stator, the circulation passage communicates with the exhaust passage, and an air suction port is formed on the first end surface, when an air flow flows along the side surface of the stator from the second end surface toward the first end surface, negative pressure can be formed in the exhaust passage, so that the air on one side of the first end surface can flow to the exhaust passage through the circulation passage;
the oil return channel can be communicated with the exhaust channel, and an oil return opening is formed on the second end face, so that lubricating oil in gas entering the exhaust channel can flow to one side of the second end face through the oil return channel.
Preferably, an acute angle opening toward the first end face is formed between the axis of the exhaust passage and the axis of the stator.
Preferably, the stator is further provided with a connecting channel, and two ends of the connecting channel are respectively connected to the circulation channel and the exhaust channel, so that the circulation channel can be communicated with the exhaust channel through the connecting channel;
the axis of the connecting channel is perpendicular to the axis of the stator, and the oil return channel is connected to the connecting channel.
Preferably, the cross sections of the circulation passage and the oil return passage are both circular, and the diameter of the circulation passage is larger than the diameter of the oil return passage.
Preferably, the number of the circulation channels is more than two, the more than two circulation channels are uniformly distributed along the circumferential direction of the stator, the number of the exhaust channels is equal to that of the circulation channels and corresponds to that of the exhaust channels one by one, and the number of the oil return channels is equal to that of the exhaust channels and corresponds to that of the exhaust channels one by one.
Preferably, the device further comprises a housing;
the stator is arranged in the shell, so that a circulation gap is formed between the side wall of the stator and the inner wall of the shell, and air flows in the circulation gap along the side surface of the stator from the second end face to the first end face.
Preferably, the cross-sectional shape of the exhaust passage is circular;
let the diameter of the exhaust passage be R, the width of the flow gap be H in the direction perpendicular to the axis of the stator, where H > R.
Preferably, the axis of the flow passage is parallel to the axis of the stator, and the air inlet is in a horn shape tapered from the first end face to the second end face.
Preferably, a first spiral structure is provided on an inner wall of the flow channel, so that the gas entering the flow channel can flow along the first spiral structure to the exhaust channel.
Preferably, the axis of the oil return passage is parallel to the axis of the stator.
Preferably, a second spiral structure is arranged on the inner wall of the oil return channel, so that lubricating oil entering the oil return channel can flow towards the oil return port along the second spiral structure.
In one aspect, the present invention provides a compressor, including an oil return structure of the compressor with any of the above technical features.
According to the oil return structure of the compressor, when air flows along the side face of the stator and flows from the second end face to the first end face, negative pressure can be formed in the exhaust channel, so that air at one side of the first end face can flow to the exhaust channel through the circulation channel, the lubricating oil at the upper end of the stator can flow back to an oil tank of the compressor, sufficient oil quantity in the oil tank can be maintained, the lubricating effect of a pump body is further guaranteed, the reliability of the compressor is improved, and the oil return structure is reasonable in design and simple in structure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic view of an embodiment of an oil return structure of a compressor according to the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
in the figure: 1. a stator; 11. a first end face; 12. a second end face; 13. a flow channel; 131. an air suction port; 14. an exhaust passage; 141. an exhaust port; 15. an oil return passage; 151. an oil return port; 16. a communication passage; 2. a housing; 21. a flow gap.
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 clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
As shown in fig. 1, 2 and 3, an oil return structure of a compressor comprises a stator 1; the stator 1 is a columnar body, and has a first end face 11 and a second end face 12 at both ends, and a flow passage 13, an exhaust passage 14, and an oil return passage 15 are provided in the stator 1. The exhaust passage 14 has an exhaust port 141 formed in a side surface of the stator 1, the flow passage 13 communicates with the exhaust passage 14, and the first end surface 11 has an intake port 131 formed therein, and when the air flows along the side surface of the stator 1 in a direction from the second end surface 12 toward the first end surface 11, a negative pressure is formed in the exhaust passage 14, so that the air on the side of the first end surface 11 can flow to the exhaust passage 14 through the flow passage 13. The oil return passage 15 can communicate with the exhaust passage 14, and an oil return port 151 is formed in the second end surface 12, so that lubricating oil in the gas that enters the exhaust passage 14 can flow to one side of the second end surface 12 through the oil return passage 15. In actual operation, the stator 1 is placed vertically inside the compressor with the first end face 11 facing upwards and the second end face 12 facing downwards. When the compressor is in operation, the air flow can flow from bottom to top along the side surface of the stator 1 (i.e. from the second end surface 12 to the first end surface 11), at this time, negative pressure can be formed in the exhaust channel 14, so that the air at one side of the first end surface 11 can flow to the exhaust channel 14 through the flow channel 13, and the flow channel 13 can be made to have a sufficient length to facilitate gas-liquid separation of the air in the flow channel 13 during the specific manufacturing. The separated lubricating oil liquid can then flow through the oil return passage 15 to one side of the second end face 12 and back into the oil sump at the bottom of the compressor. By adopting the technical scheme, lubricating oil at the upper end of the stator is favorable to flowing back to the oil sump of the compressor, so that sufficient oil quantity can be maintained in the oil sump, the lubricating effect of the pump body is further ensured, the reliability of the compressor is improved, and the compressor is reasonable in design and simple in structure.
Wherein the cross sections of the flow passage 13 and the oil return passage 15 are circular, and the diameter of the flow passage 13 is larger than the diameter of the oil return passage 15. This facilitates the lubrication oil separated from the gas and liquid in the flow passage 13 to smoothly flow in the second end face direction in the oil return passage 15.
Specifically, as shown in fig. 1, 2, an acute angle is formed between the axis of the exhaust passage 14 and the axis of the stator 1, which is open toward the first end face 11. When the air flows upwards along the side wall of the stator 1, the air in the exhaust channel 14 can be driven to flow out of the exhaust port 141 by the ejector principle, so that negative pressure is formed in the exhaust channel 14.
Further, as shown in fig. 1 and 2, the stator 1 is further provided with a connection channel 16, and two ends of the connection channel 16 are respectively connected to the circulation channel 13 and the exhaust channel 14, so that the circulation channel 13 can be communicated with the exhaust channel 14 through the connection channel 16; the axis of the connection passage 16 is perpendicular to the axis of the stator 1, and the oil return passage 15 is connected to the connection passage 16. In actual operation, since the axis of the sub-1 is vertical, the connecting channel 16 is horizontally disposed, and during manufacturing, two ends of the connecting channel 16 can be respectively connected to the lowest positions of the flow channel 13 and the exhaust channel 14, so that after the gas flow is separated from the gas and the liquid, the separated liquid lubricating oil can be stored in the connecting channel 16, the oil return channel 15 can be connected to the bottom of the connecting channel 16 and extend towards the second end face 12, and at this time, the liquid lubricating oil in the connecting channel 16 can flow to one side of the second end face 12 under the action of gravity.
Specifically, the number of the circulation channels 13 is more than two, the more than two circulation channels 13 are uniformly distributed along the circumferential direction of the stator 1, the number of the exhaust channels 14 is equal to that of the circulation channels 13 and corresponds to that of the exhaust channels 14 one by one, and the number of the oil return channels 15 is equal to that of the exhaust channels 14 and corresponds to that of the exhaust channels one by one. By adopting the scheme, the oil return amount of the lubricating oil can be increased.
In actual use, as shown in fig. 1, 2 and 3, further comprises a housing 2; the stator 1 is disposed inside the housing 2 such that a flow gap 21 is formed between a side wall of the stator 1 and an inner wall of the housing 2, and an air flow is caused to flow in the flow gap 21 along a side surface of the stator 1 from the second end surface 12 toward the first end surface 11. Wherein the cross-sectional shape of the exhaust passage 14 is circular; let the diameter of the exhaust passage 14 be R, and the width of the flow gap 21 be H in the direction perpendicular to the axis of the stator 1, where H > R. By adopting the design scheme, the low pressure can be formed in the exhaust passage 14, and the oil return effect is improved.
As an embodiment, the axis of the flow channel 13 is parallel to the axis of the stator 1, and the air inlet 131 is in a horn shape tapered in the direction from the first end surface 11 toward the second end surface 12. This allows the gas on the first end surface 11 side to smoothly enter the flow passage 13. Specifically, the inner wall of the flow passage 13 is provided with a first spiral structure so that the gas entering the flow passage 13 can flow along the first spiral structure toward the exhaust passage 14. By adopting the mode, the flow of the gas in the circulation channel 13 can be smoother, and the flow speed of the gas is ensured.
As an embodiment, the axis of the oil return passage 15 is parallel to the axis of the stator 1. Specifically, the second spiral structure is provided on the inner wall of the oil return passage 15, so that the lubricating oil that has entered the oil return passage 15 can flow toward the oil return port 151 along the second spiral structure. In this way, the flow of the lubricating oil in the oil return passage 15 can be made smoother, and the flow rate of the lubricating oil is ensured.
The invention also provides a compressor comprising the oil return structure described in the above embodiment.
The embodiment of the invention has the advantages of reasonable design, simple structure, contribution to the return of lubricating oil at the upper end of the stator to the oil pool of the compressor, capability of keeping sufficient oil quantity in the oil pool, further guarantee of the lubricating effect of the pump body and improvement of the reliability of the compressor.
The above description is only an example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (12)
1. An oil return structure of compressor, its characterized in that:
comprises a stator (1);
the stator (1) is a columnar body, a first end face (11) and a second end face (12) are respectively arranged at two ends, and a circulation channel (13), an exhaust channel (14) and an oil return channel (15) are arranged on the stator (1);
the exhaust channel (14) forms an exhaust port (141) on the side surface of the stator (1), the circulation channel (13) is communicated with the exhaust channel (14), and an air suction port (131) is formed on the first end surface (11), when air flows along the side surface of the stator (1) from the second end surface (12) towards the first end surface (11), negative pressure can be formed in the exhaust channel (14), so that air on one side of the first end surface (11) can flow to the exhaust channel (14) through the circulation channel (13);
the oil return passage (15) can be communicated with the exhaust passage (14), and an oil return opening (151) is formed in the second end face (12) so that lubricating oil in gas entering the exhaust passage (14) can flow to one side of the second end face (12) through the oil return passage (15).
2. The oil return structure according to claim 1, characterized in that:
an acute angle is formed between the axis of the exhaust channel (14) and the axis of the stator (1) and is open towards the first end face (11).
3. The oil return structure according to claim 2, characterized in that:
the stator (1) is also provided with a connecting channel (16), and two ends of the connecting channel (16) are respectively connected with the circulating channel (13) and the exhaust channel (14), so that the circulating channel (13) can be communicated with the exhaust channel (14) through the connecting channel (16);
the axis of the connecting channel (16) is perpendicular to the axis of the stator (1), and the oil return channel (15) is connected to the connecting channel (16).
4. The oil return structure according to claim 1, characterized in that:
the cross sections of the circulation channel (13) and the oil return channel (15) are circular, and the diameter of the circulation channel (13) is larger than that of the oil return channel (15).
5. The oil return structure according to claim 1, characterized in that:
the number of the circulation channels (13) is more than two, the more than two circulation channels (13) are uniformly distributed along the circumferential direction of the stator (1), the number of the exhaust channels (14) is equal to that of the circulation channels (13) and corresponds to that of the exhaust channels one by one, and the number of the oil return channels (15) is equal to that of the exhaust channels (14) and corresponds to that of the exhaust channels one by one.
6. The oil return structure according to any one of claims 1 to 5, characterized in that:
also comprises a shell (2);
the stator (1) is arranged in the shell (2), a circulation gap (21) is formed between the side wall of the stator (1) and the inner wall of the shell (2), and air flows in the circulation gap (21) along the side surface of the stator (1) from the second end surface (12) to the first end surface (11).
7. The oil return structure according to claim 6, characterized in that:
the cross-sectional shape of the exhaust passage (14) is circular;
the diameter of the exhaust passage (14) is R, and the width of the flow gap (21) is H in the direction perpendicular to the axis of the stator (1), wherein H > R.
8. The oil return structure according to any one of claims 1 to 5, characterized in that:
the axis of the flow channel (13) is parallel to the axis of the stator (1), and the air suction port (131) is in a horn shape which is reduced from the first end face (11) to the second end face (12).
9. The oil return structure according to any one of claims 1 to 5, characterized in that:
the inner wall of the circulation channel (13) is provided with a first spiral structure, so that gas entering the circulation channel (13) can flow to the exhaust channel (14) along the first spiral structure.
10. The oil return structure according to any one of claims 1 to 5, characterized in that:
the axis of the oil return passage (15) is parallel to the axis of the stator (1).
11. The oil return structure according to any one of claims 1 to 5, characterized in that:
the second spiral structure is arranged on the inner wall of the oil return channel (15), so that lubricating oil entering the oil return channel (15) can flow towards the oil return port (151) along the second spiral structure.
12. A compressor, characterized in that:
oil return structure comprising a compressor according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711091936.XA CN107893766B (en) | 2017-11-08 | 2017-11-08 | Oil return structure of compressor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711091936.XA CN107893766B (en) | 2017-11-08 | 2017-11-08 | Oil return structure of compressor and compressor |
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| Publication Number | Publication Date |
|---|---|
| CN107893766A CN107893766A (en) | 2018-04-10 |
| CN107893766B true CN107893766B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711091936.XA Active CN107893766B (en) | 2017-11-08 | 2017-11-08 | Oil return structure of compressor and compressor |
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| Country | Link |
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| CN (1) | CN107893766B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114183392B (en) * | 2021-11-10 | 2024-03-19 | 江苏大学 | Water lubrication bearing suitable for sea water desalination energy recovery all-in-one |
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| CN207568852U (en) * | 2017-11-08 | 2018-07-03 | 珠海凌达压缩机有限公司 | The oil-returning structure and compressor of compressor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2447536B1 (en) * | 2009-06-26 | 2017-12-27 | Mitsubishi Electric Corporation | Refrigerant compressor |
| US9410547B2 (en) * | 2010-01-27 | 2016-08-09 | Daikin Industries, Ltd. | Compressor with oil separator and refrigeration device including the same |
| JP5813215B2 (en) * | 2012-04-19 | 2015-11-17 | 三菱電機株式会社 | Hermetic compressor and vapor compression refrigeration cycle apparatus including the hermetic compressor |
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2017
- 2017-11-08 CN CN201711091936.XA patent/CN107893766B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327693A (en) * | 2001-04-27 | 2002-11-15 | Mitsubishi Electric Corp | Hermetic rotary compressor |
| JP2008215220A (en) * | 2007-03-05 | 2008-09-18 | Daikin Ind Ltd | Compressor |
| JP2009264175A (en) * | 2008-04-23 | 2009-11-12 | Mitsubishi Electric Corp | Refrigerant compressor |
| CN102954000A (en) * | 2011-08-31 | 2013-03-06 | 乐金电子(天津)电器有限公司 | Rotary compressor |
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| CN107893766A (en) | 2018-04-10 |
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