CN203130518U - Low backpressure rotating compressor and piston thereof - Google Patents
Low backpressure rotating compressor and piston thereof Download PDFInfo
- Publication number
- CN203130518U CN203130518U CN 201320064224 CN201320064224U CN203130518U CN 203130518 U CN203130518 U CN 203130518U CN 201320064224 CN201320064224 CN 201320064224 CN 201320064224 U CN201320064224 U CN 201320064224U CN 203130518 U CN203130518 U CN 203130518U
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- compressor
- back pressure
- rotary compressor
- low back
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Abstract
The utility model discloses a low backpressure rotating compressor and a piston thereof, and belongs to the field of construction of compressors. The upper end surface/or lower end surface of the piston is provided with a groove for storing lubricating oil. According to the piston for the low backpressure rotating compressor, at least one of the upper and lower end surfaces of the piston is provided with the groove for storing the lubricating oil, and an oil film seal is formed on the end surface, so that the gas flow which leaks from the end surface is reduced, and further the property and reliability of the compressor are improved; and the friction arranged among the end surfaces of the piston and main and subsidiary bearings of the compressor are also greatly reduced; the service life of the compressor is prolonged due to the existence of an oil film, and the use cost is reduced; and a gas leaking problem is improved, so that the oil supply of the compressor is also correspondingly improved, and the reliability of the compressor is improved.
Description
Technical field
The utility model relates to the compressor constructions field, especially relates to a kind of piston for low back pressure rotary compressor and has its low back pressure rotary compressor.
Background technique
Now all to adopt housing inner high voltage power be the high back pressure structure to the rotary compressor that extensively adopts, get back to the refrigeration agent of compressor from system by behind the gas-liquid separator, the refrigeration agent of gaseous state directly is drawn into finishes compression in the cylinder, high-temperature high-pressure refrigerant after overcompression is drained into the compressor space, discharge compressor behind the cooling motor, enter systemic circulation.
With respect to the rotary compressor of high back pressure structure, existing in a kind of housing for low-pressure is the low back-pressure structure rotary compressor that is communicated with pressure of inspiration(Pi) in the housing.The compressor of this structure is compared the high back pressure compressor in some fields, particularly in the Wei Lai rotary compressor field special advantage is arranged, this is not cause the too high or motor cooling deficiency of motor temperature like that because delivery temperature is high because the high back pressure compressor in the air-breathing environment of low-temp low-pressure, can not appear in the motor that hangs down the back pressure compressor.In addition, under the environment under low pressure, the content of compressor inner refrigerant will significantly reduce, and the refrigerant charge of refrigeration system can significantly be reduced.
But, compare the high back pressure compressor, performance is on the low side and fuel feeding difficult all be the subject matter that low back pressure rotary compressor exists, wherein the gas leakage of piston end surface is the one of the main reasons that causes these two problems.Particularly, in low back pressure compressor, because eccentric crankshaft center oilhole is communicated with the oil sump that is positioned at the low pressure housing, therefore in the environment under low pressure that the piston inner diameter place also is in pressure of inspiration(Pi) is communicated with by eccentric crankshaft center oilhole fuel feeding, and when compressor operation, the pressure of compression chamber will be higher than pressure of inspiration(Pi), particularly near exhaust the time, make the bigger pressure reduction of external diameter existence in the piston, the gap that causes the high pressure air of (piston outside) in the compression chamber to be known from experience by piston end surface leaks to (being internal piston) in the piston inner diameter, causes compressor performance on the low side.In addition, because the leakage of pressurized gas makes the pressure in piston inner diameter space be higher than oil sump pressure, cause the oil pump difficulty that oils.
In brief, in low back pressure compressor, because the gas leakage of piston end surface, one side can have influence on the performance of compressor, also can have influence on the fuel feeding of compressor on the other hand, brings reliability problems.
The model utility content
The utility model is intended to solve at least one of technical problem that exists in the prior art.
For this reason, a purpose of the present utility model is to propose a kind of piston for low back pressure rotary compressor, this piston end face is provided with the groove for storage lubricant oil, in order to when compressor operating, oil film seal can be formed at the piston end face place, solved the problem that end gas leaks.
Another purpose of the present utility model is to propose a kind of low back pressure rotary compressor with above-mentioned piston.
According to the piston that is used for low back pressure rotary compressor of the utility model first aspect, the upper-end surface of described piston and/or lower end surface are provided with the groove for storage lubricant oil.
According to the piston for low back pressure rotary compressor of the present utility model, at least one of its upper and lower end face is provided with the groove for storage lubricant oil, thereby form oil film seal in this end, the gas flow that minimizing is leaked out from this end, and then improved the Performance And Reliability of compressor, and because the existence of oil film can also significantly reduce the friction between the major and minor bearing of piston end surface and compressor, improve the working life of compressor, and then reduce user cost.And, owing to improved the gas leakage problem, the therefore also corresponding fuel feeding problem of having improved compressor, thus improved the reliability of compressor.
In addition, according to the piston for low back pressure rotary compressor of the present utility model, can also have following additional technical feature:
In an embodiment of the present utility model, described groove be toroidal cavity and with the concyclic heart of described piston.
Can store enough lubricant oil like this, and can form sealing oil film uniformly in piston end face, avoid week upwards not have sealing oil film or even at the sealing oil film uneven distribution that makes progress in week in the appearance part, thereby improve the pressurized gas of piston outside better from the phenomenon of end leakage.
The outer circumferential face of described toroidal cavity and described piston and inner peripheral surface are spaced apart respectively.Like this, can guarantee to form good oil film seal at piston end surface.
Described toroidal cavity is a plurality of and spaced diametrically.
Described groove is a plurality of and upwards at interval arranges in week.
In another embodiment of the present utility model, described a plurality of grooves upwards evenly distributed in week.
The outer circumferential face of each described groove and described piston and inner peripheral surface are spaced apart respectively.
Each described groove is circle, ellipse or long-round-shape.
The degree of depth of described groove is not more than 1.5mm.Thus, make things convenient for the processing of groove, and when piston ran up, the lubricant oil in the groove also can successfully form oil film seal at the piston end face place.
According to the low back pressure rotary compressor of the utility model second aspect, comprise the piston that is used for low back pressure rotary compressor according to the above-mentioned first aspect of the utility model.
Additional aspect of the present utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming embodiment's the description in conjunction with following accompanying drawing, wherein:
Fig. 1 is the sectional view according to an embodiment's of the utility model piston;
Fig. 2 is the plan view according to an embodiment's of the utility model piston;
Fig. 3 is the plan view according to another embodiment's of the utility model piston;
Fig. 4 is the sectional view of groove.
Description of reference numerals:
Embodiment
Describe embodiment of the present utility model below in detail, described embodiment's example is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center "; " vertically "; " laterally "; " length "; " width "; " thickness ", " on ", D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", close the orientation of indications such as " counterclockwise " or position is based on orientation shown in the drawings or position relation, only be the utility model and simplification description for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is arranged in addition.
In the utility model, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand the concrete implication of above-mentioned term in the utility model as the case may be.
In the utility model, unless clear and definite regulation and restriction are arranged in addition, first feature second feature it " on " or D score can comprise that first and second features directly contact, can comprise that also first and second features are not directly contacts but by the contact of the additional features between them.And, first feature second feature " on ", " top " and " above " comprise first feature directly over second feature and oblique upper, or only represent that the first characteristic level height is higher than second feature.First feature second feature " under ", " below " and " below " comprise first feature under second feature and tiltedly, or only represent that the first characteristic level height is less than second feature.
Below with reference to the piston 1 that be used for low back pressure rotary compressor of Fig. 1-Fig. 4 description according to the utility model embodiment.
According to an embodiment's of the utility model piston 1, the upper-end surface of this piston 1 and/or lower end surface are provided with the groove 11 for storage lubricant oil.For example, in a preferred embodiment of the present utility model, be respectively equipped with groove 11 on the upper-end surface of piston 1 and the lower end surface.And for example, in another embodiment of the present utility model, the upper-end surface of piston 1 is provided with groove 11, and the lower end surface can not arrange groove 11.For another example, in another embodiment of the present utility model, the lower end surface of piston 1 is provided with groove 11, on the upper-end surface groove 11 can be set.
This groove 11 is used for storage lubricant oil, like this when low back pressure rotary compressor is worked, piston 1 runs up, can form the oil film of one deck densification between its upper-end surface and main bearing and lower end surface and the supplementary bearing, this oil film is the gap between packed-piston 1 upper-end surface and main bearing and piston 1 lower end surface and the supplementary bearing better, thereby avoid because piston 1 inside and outside differential pressure causes the pressurized gas (be compression chamber in through the pressurized gas after the overcompression) of piston 1 outside to enter piston 1 inside (space between piston 1 inner peripheral surface and the eccentric part) from above-mentioned gap, and then reduce the gas gross that goes out from piston 1 face leakage.
Need to prove, in the utility model, the description of relevant piston 1 end face, if not have specified otherwise be the upper-end surface or be the lower end surface, then this end face can be understood as upper-end surface or lower end surface or upper-end surface and lower end surface.
The piston 1 that is used for low back pressure rotary compressor according to the utility model embodiment, at least one of its upper and lower end face is provided with the groove 11 for storage lubricant oil, thereby form oil film seal in this end, the gas flow that minimizing is leaked out from this end, and then improved the Performance And Reliability of compressor, and because the existence of oil film can also significantly reduce the friction between piston 1 end face and the major and minor bearing of compressor, improve the working life of compressor, and then reduce user cost.And, owing to improved the gas leakage problem, the therefore also corresponding fuel feeding problem of having improved compressor, thus improved the reliability of compressor.
In addition, according to the utility model embodiment's piston 1, its optimal way can promote the efficiency of compressor so to greatest extent in the upper and lower end face of piston 1 groove 11 to be set all.Certainly, be understandable that the utility model is not limited thereto, for example can groove 11 only be set in the upper-end surface of piston 1 or only in the lower end surface of piston 1 groove 11 be set according to actual conditions.
In an embodiment of the present utility model, as shown in Figure 3, groove 11 be ring and with the piston 1 concyclic heart, can store enough lubricant oil like this, and can form the oil film of sealing uniformly at the end face of piston 1, avoid week upwards not have sealing oil film or even at the sealing oil film uneven distribution that makes progress in week in the appearance part, thereby improve the pressurized gas of piston 1 outside better from the phenomenon of end leakage.
Further, toroidal cavity 11 is spaced apart respectively with outer circumferential face and the inner peripheral surface of piston 1.In other words, toroidal cavity 11 has diapire, from the diapire periphery along upwardly extending periphery wall and from the upwardly extending inner circle wall in diapire inner edge, wherein the outer circumferential face of periphery wall and piston 1 keeps at a certain distance away, the inner peripheral surface of inner circle wall and piston 1 keeps at a certain distance away, and namely toroidal cavity 11 and piston 1 are inside and outside all directly is not communicated with.Like this, can guarantee to form good oil film seal at piston 1 end face.
Preferably, toroidal cavity 11 is a plurality of and spaced diametrically.In other words, toroidal cavity 11 is a plurality of and is arranged in concentric circle.Thus, can on piston 1 end face, form oil film seal better, improve the efficiency of compressor.
In another embodiment of the present utility model, so as Fig. 1 and Fig. 2, groove 11 is a plurality of and in the layout at interval that makes progress in week, each groove 11 all can be circle, perhaps is ellipse, perhaps is long-round-shape.Certainly, be understandable that the shape of groove 11 is not limited to above-mentioned circle, ellipse or long-round-shape.
Preferably, a plurality of grooves 11 upwards evenly distributed in week, can form the oil film of sealing uniformly at the end face of piston 1 like this, avoid week upwards not have sealing oil film or even at the sealing oil film uneven distribution that makes progress in week in the appearance part, thereby improve the pressurized gas of piston 1 outside better from the phenomenon of end leakage.
As shown in Figure 2, each groove 11 is spaced apart respectively with outer circumferential face and the inner peripheral surface of piston 1, be that each groove 11 is all also spaced apart with the inner peripheral surface of piston 1 with the outer circumferential face of piston 1 while spaced apart, that is to say that each groove 11 and piston 1 are inside and outside all directly not to be communicated with.Like this, can guarantee to form good oil film seal at piston 1 end face.
In preferred embodiments more of the present utility model, the degree of depth of groove 11 is not more than 1.5mm, and as shown in Figure 4, the degree of depth of groove 11 is d, and d≤1.5mm is namely arranged.Thus, make things convenient for the processing of groove 11, and when piston 1 ran up, the lubricant oil in the groove 11 also can successfully form oil film seal in the end of piston 1.
In general, the piston 1 that is used for low back pressure rotary compressor according to a preferred embodiment of the utility model, by be provided for the groove 11 of oil storage at piston 1 end face, can form oil film seal in the end on the one hand, can also reduce the wearing and tearing of piston 1 end face on the other hand, compare with traditional low back pressure rotary compressor, the piston 1 of compressor of the present utility model is owing to adopted the design of end face fluting, its refrigerating capacity has approximately improved 2%, power consumption approximately descends 1%, thereby it is about 3% to make that the efficiency of compressor of the present utility model has promoted, and effect is particularly remarkable.
According to the utility model embodiment's low back pressure rotary compressor, comprise according to the piston of describing in the utility model above-described embodiment 1 that is used for low back pressure rotary compressor.
Be understandable that, all be prior art according to other configuration example of the utility model embodiment's low back pressure rotary compressor such as cylinder, major-minor bearing, slide plate, bent axle, drive motor etc. and working principle thereof, and known by those skilled in the art, described in detail no longer one by one here.
In the description of this specification, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present utility model or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiments or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiments under the situation that does not break away from principle of the present utility model and aim, scope of the present utility model is limited by claim and equivalent thereof.
Claims (10)
1. a piston that is used for low back pressure rotary compressor is characterized in that, the upper-end surface of described piston and/or lower end surface are provided with the groove for storage lubricant oil.
2. the piston for low back pressure rotary compressor according to claim 1 is characterized in that, described groove be toroidal cavity and with the concyclic heart of described piston.
3. the piston for low back pressure rotary compressor according to claim 2 is characterized in that, the outer circumferential face of described toroidal cavity and described piston and inner peripheral surface are spaced apart respectively.
4. according to claim 2 for the piston that hangs down the back pressure rotary compressor, described toroidal cavity is a plurality of and spaced diametrically.
5. the piston for low back pressure rotary compressor according to claim 1 is characterized in that, described groove is a plurality of and upwards arranges at interval in week.
6. the piston for low back pressure rotary compressor according to claim 5 is characterized in that, described a plurality of grooves upwards evenly distributed in week.
7. the piston for low back pressure rotary compressor according to claim 5 is characterized in that, the outer circumferential face of each described groove and described piston and inner peripheral surface are spaced apart respectively.
8. the piston for low back pressure rotary compressor according to claim 5 is characterized in that each described groove is circle, ellipse or long-round-shape.
9. according to each described piston for low back pressure rotary compressor among the claim 1-8, it is characterized in that the degree of depth of described groove is not more than 1.5mm.
10. one kind low back pressure rotary compressor is characterized in that, comprises according to each described piston for low back pressure rotary compressor among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320064224 CN203130518U (en) | 2013-02-04 | 2013-02-04 | Low backpressure rotating compressor and piston thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320064224 CN203130518U (en) | 2013-02-04 | 2013-02-04 | Low backpressure rotating compressor and piston thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203130518U true CN203130518U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320064224 Expired - Lifetime CN203130518U (en) | 2013-02-04 | 2013-02-04 | Low backpressure rotating compressor and piston thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN203130518U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485932A (en) * | 2013-09-16 | 2014-01-01 | 宁波荣捷特机械制造有限公司 | Stirling cycle device |
| CN105392994A (en) * | 2014-02-21 | 2016-03-09 | 大丰工业株式会社 | Rotor and rotary fluid machine |
| CN113565761A (en) * | 2021-08-30 | 2021-10-29 | 广东美芝制冷设备有限公司 | Piston, rotary compressor and refrigeration equipment |
-
2013
- 2013-02-04 CN CN 201320064224 patent/CN203130518U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485932A (en) * | 2013-09-16 | 2014-01-01 | 宁波荣捷特机械制造有限公司 | Stirling cycle device |
| CN105392994A (en) * | 2014-02-21 | 2016-03-09 | 大丰工业株式会社 | Rotor and rotary fluid machine |
| CN113565761A (en) * | 2021-08-30 | 2021-10-29 | 广东美芝制冷设备有限公司 | Piston, rotary compressor and refrigeration equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |
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| CX01 | Expiry of patent term |