CN100432442C - Negative pressure regulating structure of vortex compressor - Google Patents
Negative pressure regulating structure of vortex compressor Download PDFInfo
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- CN100432442C CN100432442C CNB2004100199026A CN200410019902A CN100432442C CN 100432442 C CN100432442 C CN 100432442C CN B2004100199026 A CNB2004100199026 A CN B2004100199026A CN 200410019902 A CN200410019902 A CN 200410019902A CN 100432442 C CN100432442 C CN 100432442C
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- negative pressure
- negative
- vortex
- scroll compressor
- pressure regulating
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Abstract
The present invention relates to a negative pressure regulating structure of a vortex compressor, which comprises a negative pressure cavity, a bypass pipe line and a negative pressure regulating part, wherein the negative pressure cavity is formed on one side of an upper part frame, and the negative pressure cavity accommodates the fluid of the discharge side of the vortex compressor and lubricating oil provided from a lubricating oil storing groove and supports the negative pressure of a movable vortex wheel; the negative pressure cavity and the suction side of the vortex compressor are communicated by the bypass pipe line; the negative pressure regulating part selectively opens and closes the bypass pipe line. The negative pressure regulating structure of a vortex compressor can sustain the inner part of a negative pressure space formed in the upper part frame at definite middle pressure and prevent the phenomena of the movable vortex wheel excessively oppressing a fixed vortex wheel. Pressure difference between the inner and the outer parts of the negative pressure cavity can be reduced, and the phenomenon of the lubricating oil excessively leaking from the negative pressure cavity is prevented. The negative pressure regulating structure of a vortex compressor can properly regulate the amount of the lubricating oil flowing through the negative pressure regulating part, provide the proper lubricating oil for the compression part and raise the efficiency of the vortex compressor.
Description
Technical field
The present invention relates to scroll compressor, negative pressure at the moving turbine downside of scroll compressor inner support is maintained presses in the middle of certain, anti-stop turbine and decide excessive friction between the turbine and the negative pressure regulation structure of the scroll compressor of the leakage of lubricant oil.
Background technique
In general, compressor is the device that mechanical energy is converted to the compression energy.Compressor can be divided into substantially: toward several types such as dbl act, eddy type, circle center type, blade types.Scroll compressor is widely used in air-conditioning and refrigerator.
Scroll compressor is divided into low pressure type scroll compressor and high pressure type scroll compressor, and what promptly scroll compressor was full of according to its casing inside is to suck gas or discharge gas to be divided into low pressure type scroll compressor or high pressure type scroll compressor.Scroll compressor compresses operation by the relative movement of deciding turbine and moving turbine.Decide turbine and constituted by spiral volute curved surface, and with the irrelevant to rotation of live axle, be fixed parts.Moving turbine is along with the rotation of live axle is rotated together.
In recent years, along with the refrigerant of scroll compressor becomes high pressure usefulness, the pressure of the refrigerant that produces in the turbine press part also increases thereupon.Because the increase of pressure, act on the thrust face of upper stand with putting on excessive pressure on the moving turbine, make between the thrust face of the back side of turbine and upper stand and produce excessive frictional force, cause the wearing and tearing of part and the generation of noise, reduced the efficient of compressor.
In order to address the above problem, taking following measure: dig out circular groove on the thrust face in upper stand, in groove, be provided with the sealed member of circular band shape in the past.The back side at moving turbine forms suitable negative pressure space, utilizes negative pressure to support moving turbine, reaches a solution of a problem.
As shown in Figure 1, in the past general high voltage formula scroll compressor is by the drive motor 20 that rotor 22 and stator 21 are constituted; Together rotate along with the rotation of drive motor 20, and comprise the drive portion that top is formed with the live axle 10 of eccentric part 12; Be mounted to the upside of live axle 10, support live axle 10, and form the upper stand 30 of negative pressure space 33 at the peripheral position of central groove; The parts such as suction portion that include the suction pipe 70 that external fluid can flow into constitute.
12 sliding sleeves that contact 13 of the outer circumferential face extrapolation of eccentric part 12 and eccentric part are formed with the annular banded sealed member 32 that presents on the thrust face of upper stand 30.
General high voltage formula scroll compressor in the past also includes: be positioned at the upside of upper stand 30, the moving turbine 50 of the refrigerant that sucks via suction pipe 70 by the compression that rotatablely moves; With moving turbine 50 match be fixed on upper stand 30 upsides decide turbine 51; Comprise and to make the vortex press part of turbine 50 at the slide block ring of deciding turbine 51 inner rotations; The vertical exhaust port 60 that connects the central part of deciding turbine 51; The top at compressor forms space, the discharge chamber 61 that is connected with exhaust port 60; Be arranged on a side of casing, can make the parts such as discharge portion of the discharge tube 62 that the high pressure refrigerant of accumulation flows out.
General high voltage formula scroll compressor in the past also includes: the lubricating oil flow path 11 that forms along the inside of live axle 10; With the lubricant oil supply unit that provides the oil feeder 14 of lubricant oil to constitute by past lubricating oil flow path 11.
The working procedure of above-mentioned scroll compressor is as follows: the refrigerant of the low-pressure state of process inflation process flow into compressor inside by suction pipe 70; The refrigerant that flows into flows to the vortex press part.The refrigerant of compressed high pressure conditions flows to by exhaust port 60 and discharges chamber 61 in the vortex press part; Be discharged to the outside of compressor by discharge tube 62.
Carry out in the process in above-mentioned compression process, the oil that is stored in the compressor case bottom surface is pressed to upside by the oil feeder 14 that together rotates with the rotation of live axle 10.Oil can rise to the upper end portion of live axle 10 along oil circuit 11, then sprays to the upside of eccentric part 12.The oil of ejection can be wandered along the slit between eccentric part 12 and the sliding sleeve 13, realizes lubrication.Oil finally is gathered in the negative pressure space 33 that is formed in the upper stand 30.
When the discharge pressure that forms in the vortex press part is big, cause the bottom surface of moving turbine 50 and the excessive phenomenon of oppressing of thrust face of upper stand 30 easily.In order to prevent the generation of above-mentioned phenomenon, in thrust face, insert sealed member 32, in negative pressure space 33, can form certain pressure, support moving turbine 50, reduce friction.
As shown in Figure 2, the vortex press part is included in the fixedly spiral volute curved surface 53 that the downside of deciding turbine 51 forms with spiral in shape; Upside at moving turbine 50 forms with spiral in shape, and the rotating screw volute curved surface 52 that inserts with fixing spiral volute curved surface 53 dislocation, 180 degree; Be formed at the fixedly exhaust port 60 of the inner end of spiral volute curved surface 53.
Below, the compression process of refrigerant is described: at first, be that the center is eccentric with exhaust port 60 rotate moving turbine 50.Along with moving turbine 50 with decide relative rotation between the turbine 51, between the volute curved surface 52,53 generating plane is contacted separately, formed the chamber 99 of compression refrigerant.Formed chamber 99 rotates near spiral volute center of surface portion along with moving, and its volume will be more and more littler.Along with reducing of chamber 99 volumes, its inside will be in high pressure conditions.The fluid of formed high pressure will flow to by the exhaust port 60 that is formed at the scroll element central part discharges chamber 61.
High pressure swirl compressor in the past, the pressure that produces negative pressure is the head pressure of discharging from the vortex press part.Therefore, may cause the situation of pressing over effect of discharging sometimes.Occur making turbine excessively to oppress the phenomenon of deciding turbine.Moving turbine excessively compressing is decided under the situation of turbine, the phenomenon that sealed member breaks away from can occur.Cause the problem of the oil leakage that accumulates in negative pressure space.And, because excessive pressure difference also can cause the distortion of parts easily.
Summary of the invention
Technical problem to be solved by this invention is, a kind of sealed member that is formed with in upper stand is provided, and be provided with the negative pressure adjusting portion of negative pressure being regulated the intermediate pressure lower slightly, with the negative pressure regulation structure of the scroll compressor of the stability that improves moving turbine than head pressure.
For the technical solution problem, the technical solution used in the present invention is: a kind of negative pressure regulation structure of scroll compressor, comprise a side that is formed at upper stand, hold the discharge side liquid of scroll compressor and the negative cavity of the negative pressure of the moving turbine of the support of the lubricant oil that from the lubricant oil holding tank, provides; The bypass line that is communicated with the suction side of negative cavity and scroll compressor; Open and close the negative pressure adjusting portion of bypass line selectively.
Described bypass line and negative pressure adjusting portion are formed on the upper stand.
Described negative pressure adjusting portion includes: be arranged at the negative pressure regulating valve on the pipeline of bypass line; Support the negative pressure Regulation spring of negative pressure regulating valve; Support the fixed end of negative pressure Regulation spring.
The invention has the beneficial effects as follows: the negative pressure space inside that is formed at upper stand inside is kept to press in the middle of certain, can prevent the phenomenon that turbine is decided in the excessive compressing of stop turbine.In addition, can reduce the pressure difference between the inside and outside of negative cavity, prevent the phenomenon that lubricant oil is excessively revealed from negative cavity.The adjusting that can suit can provide the lubricant oil of appropriate amount toward press part by the amount of the lubricant oil of negative pressure adjusting portion outflow, improves the efficient of scroll compressor.
Description of drawings
Fig. 1 utilizes sealed member to form the profile diagram of the high in the past pressure type scroll compressor of negative pressure chamber.
Fig. 2 is the sectional view of the refrigerant compression process of carrying out in the press part of general scroll compressor.
Fig. 3 is the sectional view of the negative pressure regulation structure of scroll compressor of the present invention.
Fig. 4 is the expansion sectional view of negative pressure regulation structure.
Fig. 5 is the stereogram of the sealed member of scroll compressor of the present invention.
Fig. 6 is the stereogram of the negative pressure adjusting portion of scroll compressor of the present invention.
Among the figure, 101: the negative pressure regulating valve; 102: the negative pressure Regulation spring; 103: fixed end; 104: bypass line; 105: sealed member; 108: main bearing; 120: upper stand; 121: the 1 negative cavities; 122: the 2 negative cavities.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
As shown in Figure 3 and Figure 4, the scroll compressor of negative pressure regulation structure of the present invention is by the lubricant oil oil circuit 111 that forms with the inside of axle direction perforation live axle 110; Be formed at the top of live axle 110, carry out the eccentric part 112 that off-centre rotatablely moves; Be formed at the sliding sleeve 113 in the outside of eccentric part 112; Be formed at the upside of live axle 110, support upper stand 120 parts such as grade of live axle 110 to constitute.
The contacted position of the outer circumferential face of the inner peripheral surface of upper stand 120 and live axle 110 is formed with main bearing 108.The central part of upper stand 120 is formed with along the inner peripheral surface of upper stand 120 and forms, and holds the lubricant oil that rises via lubricant oil oil circuit 111 and the 1st negative cavity 121 of a spot of high pressure refrigerant of rising by main bearing 108.
Scroll compressor of the present invention also includes: be arranged at upper stand 120 inside, the pressure of the 1st negative cavity 121 is adjusted to certain middle negative pressure adjusting portion 109 of pressing; The 2nd negative cavity 122 that holds a certain amount of fluid that flows out by negative pressure adjusting portion 109.
Scroll compressor of the present invention also includes: the bypass line 104 that is communicated with the 1st negative cavity 121 and negative pressure adjusting portion 109 and the 2nd negative cavity 122.
Negative pressure adjusting portion 109 includes: be contacted with on the bypass line 104 that is connected the 1st negative cavity 121, be arranged at the negative pressure modulating valve 101 on the pipeline of bypass line 104; Support the negative pressure Regulation spring 102 of negative pressure modulating valve 101; Support the fixed end 103 of negative pressure Regulation spring 102.
The present invention also includes: be formed at the closed material of the band shape that presents annular on the thrust face of upper stand 120, the sealed member 105 of pressing in the middle of promptly can being maintained the fluid of being regulated by negative pressure adjusting portion 109; Be housed inside the slide block ring 130 that fluid lubricated of the 2nd negative cavity 122.
The present invention also includes: be installed on the thrust face of upper stand 120 the moving turbine 140 that rotates; Be positioned at the upside of moving turbine 140, be fixed in and decide turbine 150 on the upper stand 120.
The 2nd negative cavity 122 is connected with flow of lubricant inlet 107.Flow of lubricant inlet 107 is connected with the suction port 171 and the suction pipe 170 of the vortex press part that flows into low pressure refrigerant.
Moving turbine 140 includes: the spiral rotating screw volute curved surface 141 that is formed at upside; Be formed at the downside central part, be inserted in the axle sleeve at the center of upper stand 120.In addition, deciding turbine 150 includes: match with rotating screw volute curved surface 141 and the fixedly rotating screw volute curved surface 151 that forms constitutes.
The present invention also includes: connect the central authorities that decide turbine 150, discharge the exhaust port 160 of the high-pressure liquid that is compressed by moving rotatablely moving of turbine 140.
Below, the function and the effect of the negative pressure regulation structure of scroll compressor of the present invention are described:
Refrigerant under the low-pressure state will enter press part by suction pipe 170 and suction port 171.Because rotatablely moving of moving turbine 140, refrigerant is compressed to high pressure conditions.Compression process be by rotating screw volute curved surface 141 and fixedly the interaction of spiral volute curved surface 151 finish.Compress mode is identical with the compress mode of described scroll compressor in the past.
Compressed high pressure conditions refrigerant will flow to by exhaust port 160 and discharge the chamber, flow to then in the lower case of the compressor that is provided with discharge tube, and the high pressure conditions refrigerant that accumulates in lower case will move in the 1st negative cavity 121 along main bearing 108.
The lubricant oil that rises along lubricant oil oil circuit 111 rises to the last rear flank of eccentric part 112 and sends forth, and the lubricant oil of sending forth can flow down along the surface of contact of sliding sleeve 113 and eccentric part 112, plays lubrication.
The lubricant oil that flows down converges with the high pressure conditions refrigerant that rises by main bearing 108, and is gathered in the 1st negative cavity 121.
The fluid-mixing that accumulates in the 1st negative cavity 121 will flow along bypass line 104, and exert pressure to the negative pressure modulating valve 101 of negative pressure adjusting portion 109.
The effect of negative pressure adjusting portion 109 is as follows: press in the middle of certain for negative pressure space 108 is maintained, put on hydrodynamic pressure on the negative pressure modulating valve 101 surpass decide under the intermediate pressure situation, negative pressure Regulation spring 102 will be extruded.In a single day negative pressure Regulation spring 102 is extruded, and a certain amount of fluid will be discharged by bypass line 104, thereby keeps certain middle pressure.Therefore, because a certain amount of fluid can be discharged by bypass line 104, the 1st negative cavity 121 can be kept certain middle pressure.
By a certain amount of fluid that bypass line 104 is discharged, can be to the lower button and upper stand 120 lubricates of slide block ring 130.Fluid can arrive the 2nd negative cavity 122 then.In addition, the fluid that is formed at the 2nd negative cavity 122 inside will enter the mouth by flow of lubricant and 107 flow to suction port 171, finally in vortex press part inside to spiral volute curved surface 141,151 lubricates.Because the 2nd negative cavity 122 is connected with suction port 171, therefore maintain and flow into the low-pressure state refrigerant pressure about the same of suction port 107.
As shown in Figure 5, the sealed member of scroll compressor of the present invention presents the band shape of annular, and its transverse section also presents near circular shape, and sealed member 105 is positioned on the thrust face of upper stand 120.
Sealed member 105 presents the shape of inner hollow, and has stretchability to a certain degree.When acting on pressure less than normal on sealed member 105, sealed member 105 can be kept original shape, and when acting on pressure bigger than normal when the fluid that flows into high pressure on sealed member 105, it is big that the radius of curvature of the transverse section of sealed member 105 will become.
Because it is big that the radius of curvature of sealed member 105 becomes, fluid will can be by the upside of sealed member 105 and the contact position leakage of the bottom surface of moving turbine.And, because the existence of sealed member 105, can reduce the excessive friction power between the surface of contact of the thrust face of the upper stand 120 that causes owing to the excess pressure that in press part, forms and moving turbine.
As shown in Figure 6, the negative pressure adjusting portion includes spherical negative pressure regulating valve 101; Support the negative pressure Regulation spring 102 of negative pressure regulating valve 101; Support the fixed end 103 of negative pressure Regulation spring 102 to constitute.
Negative pressure Regulation spring 102 promptly has certain spring pressure value P for possessing the elastic member of certain elasticity coefficient
sTherefore, the pressure of the fluid in flowing in negative pressure bypass line 104, i.e. P
hPressure when putting on the negative pressure regulating valve 101, press P if the pressure of fluid surpasses in the middle of certain
mMore than, negative pressure Regulation spring 102 will dwindle.
In other words, the negative pressure Regulation spring 102 spring pressure P that can bear
sValue is with the 1st negative cavity 121 inner certain middle P of pressure that will keep
mIdentical.
The pressure of the fluid that flows in bypass line 104 is assumed to be P
iThe time, that is, and P
i=P
h-P
s(P
m).Therefore, on the result, because negative pressure structure, the 1st negative cavity 121 inside of scroll compressor of the present invention can be kept certain middle pressure all the time.
Claims (2)
1, a kind of negative pressure regulation structure of scroll compressor, it is characterized in that comprising a side that is formed at upper stand (120), hold the discharge side liquid of scroll compressor and the negative cavity of the negative pressure of the moving turbine (140) of the support of the lubricant oil that from the lubricant oil holding tank, provides; The bypass line (104) that is communicated with the suction side of negative cavity and scroll compressor; Open and close the negative pressure adjusting portion of bypass line (104) selectively; Described bypass line (104) and negative pressure adjusting portion are formed on the upper stand (120).
2, the negative pressure regulation structure of scroll compressor according to claim 1 is characterized in that described negative pressure adjusting portion includes: be arranged at the negative pressure regulating valve (101) on the pipeline of bypass line (104); Support the negative pressure Regulation spring (102) of negative pressure regulating valve (101); Support the fixed end (103) of negative pressure Regulation spring (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100199026A CN100432442C (en) | 2004-07-08 | 2004-07-08 | Negative pressure regulating structure of vortex compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100199026A CN100432442C (en) | 2004-07-08 | 2004-07-08 | Negative pressure regulating structure of vortex compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1719036A CN1719036A (en) | 2006-01-11 |
| CN100432442C true CN100432442C (en) | 2008-11-12 |
Family
ID=35930953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100199026A Expired - Fee Related CN100432442C (en) | 2004-07-08 | 2004-07-08 | Negative pressure regulating structure of vortex compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100432442C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8297958B2 (en) * | 2009-09-11 | 2012-10-30 | Bitzer Scroll, Inc. | Optimized discharge port for scroll compressor with tip seals |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60243388A (en) * | 1984-05-18 | 1985-12-03 | Hitachi Ltd | Scroll compressor |
| US4928503A (en) * | 1988-07-15 | 1990-05-29 | American Standard Inc. | Scroll apparatus with pressure regulation |
| CN2175841Y (en) * | 1993-10-25 | 1994-08-31 | 西安交通大学 | Coiled compressor with backpressure controlling mechanism |
| JPH08303371A (en) * | 1996-06-17 | 1996-11-19 | Matsushita Electric Ind Co Ltd | Scroll gas compressor |
| JP2001317475A (en) * | 2000-05-11 | 2001-11-16 | Matsushita Electric Ind Co Ltd | Scroll compressor |
-
2004
- 2004-07-08 CN CNB2004100199026A patent/CN100432442C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60243388A (en) * | 1984-05-18 | 1985-12-03 | Hitachi Ltd | Scroll compressor |
| US4928503A (en) * | 1988-07-15 | 1990-05-29 | American Standard Inc. | Scroll apparatus with pressure regulation |
| CN2175841Y (en) * | 1993-10-25 | 1994-08-31 | 西安交通大学 | Coiled compressor with backpressure controlling mechanism |
| JPH08303371A (en) * | 1996-06-17 | 1996-11-19 | Matsushita Electric Ind Co Ltd | Scroll gas compressor |
| JP2001317475A (en) * | 2000-05-11 | 2001-11-16 | Matsushita Electric Ind Co Ltd | Scroll compressor |
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| Publication number | Publication date |
|---|---|
| CN1719036A (en) | 2006-01-11 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20160708 |