CN100383397C - Axial leakage prevention apparatus for winding shaft compressor - Google Patents
Axial leakage prevention apparatus for winding shaft compressor Download PDFInfo
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- CN100383397C CN100383397C CNB031298753A CN03129875A CN100383397C CN 100383397 C CN100383397 C CN 100383397C CN B031298753 A CNB031298753 A CN B031298753A CN 03129875 A CN03129875 A CN 03129875A CN 100383397 C CN100383397 C CN 100383397C
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- thrust
- bearing
- spinning reel
- main frame
- elastic member
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Abstract
The present invention relates to a shaft direction leakage preventing device of a scroll compressor. The present invention is characterized in that the shaft direction leakage preventing device is composed of a thrust bearing and an elastic component, wherein the thrust bearing is positioned between a main frame and a rotary scroll placed on the main frame and is in sliding contact with the back surface of the rotary scroll in order to rotate the rotary scroll; the elastic component can be used for applying elastic pressure to the thrust bearing to cause the tail end of a wrap of the rotary scroll to be tightly attached to the bottom of a hard board of a fixed scroll. Because the present invention can prevent compressed cooling media from leaking between the tail end of the wrap of the rotary scroll and the sealing surface of the hard board of the fixed scroll, the present invention has the advantages of high compression efficiency of the scroll compressor, simple sealing structure, low production cost, and long service life of sealing members.
Description
Technical field
The present invention relates to scroll compressor, relate in particular to the leakage preventer of scroll compressor.
Background technique
In general, scroll compressor is that the sheath by fixing sheath of spool (wrap) and the spinning reel that rotate relative with its direction forms pressing chamber, and forms high pressure and area of low pressure in this pressing chamber.In order to prevent to exist pressure difference to leak because of these two zones, need high pressure and area of low pressure are isolated in the mode of being close to fully, but, want that to realize isolating be very difficult by being close to fully owing to reasons such as frictional heat that produces in the running and compressive deformations.
With reference to the accompanying drawings existing scroll compressor is illustrated:
As shown in Figure 1, 2, in existing scroll compressor, upper and lower in sealing shell 1 inside is equipped with main frame (main frame) 20 and sub-frame (sub-frame) 25 respectively, be equipped with above the main frame 20 and be used for compression refrigerant gas and, be equipped with between main frame 20 and the sub-frame 25 and be used for the motor section 30 of drive compression portion 10 press part 10 of its discharge.
The structure of press part 10 is: it is by fixedly spool 11 and spinning reel 12 constitute, wherein fixedly spool possesses and is gradually sheath (wrap) 11a that opens (involute) curve shape, spinning reel also possesses the sheath 12a that is involute curve shape, and its involute curve and fixedly the involute curve of spool have certain phase difference.Can form pressing chamber C by the relatively mutual interlock of two spool directions.
For the scroll compressor with said structure, if connect power supply on the stator 31 of motor section 30, rotor 32 will rotate so, and meanwhile live axle 33 also can rotate thereupon.The live axle 33 off-centre rotation that spinning reel 11 is done be equivalent to eccentric distance thus.Meanwhile, spinning reel 11 also can be under the effect of parts 17 is initial point with the axle center, and the motion of spiraling is done in the place that is equivalent to turn circle radius in distance initial point distance.
Rotatablely move by this of spinning reel 11, at the sheath 11a of spinning reel 11 and fixedly can form pressing chamber C between the sheath 12a of spool 12, this pressing chamber C moves to the center by the athletic meeting of spiraling of continuing of spinning reel, and volume reduces when moving, pressure rises, thereby the cold media air of suction can be discharged by tap hole 16, the gas that is discharged from can be flowed through and be discharged the chamber at last by discharge tube 18 discharges.
In order in the process of pressurized gas, loss to be dropped to minimum, should prevent as far as possible that pressurized gas from leaking.The leakage of pressurized gas mainly contains two kinds, and a kind of is the axial leakage that takes place by axial slit, and a kind of is the leakage radially that the slit by radial direction takes place.Wherein influencing relatively large is the axial leakage that takes place by axial slit, in order to prevent this leakage, as shown in Figures 2 and 3, seal groove 11b, the 12b of involute shape on sheath 11a, the 12a of fixedly spool 11 or spinning reel 12, have been formed, and having inserted sealing (seal) parts in the inside of this seal groove 11b, 12b is tip seals (tip seal) 11c, 12c, thereby can prevent leakage in the compression process by this structure.
That is to say that in the compressor operating process, there are certain tolerance in tip seals 11c, 12c owing between them, thereby can have certain slit when being in the inside of seal groove 11b, 12b.Fashionable from these slit flow when pressurized gas, tip seals 11c, 12c can float in seal groove 11b and be close on the spool on opposite, thereby can prevent the leakage of pressurized gas.
Compressor can since the heat that produces in the running and pressure deform, thereby its reliability is reduced, in order to address this problem, spinning reel 12 and fixedly spool 11 on short transverse, keeping certain interval.But can produce again thus by the leakage of high pressure to low pressure, in order to reduce this leakage to greatest extent, spinning reel 12 and fixedly the short transverse of spool 11 formed seal groove 11b, 12b, and in these seal grooves, inserted tip seals 11c, 12c.Can reduce leakage rate by this structure.
But in such structure, if the interval of short transverse is done too much, leakage rate will increase so, thereby efficient is reduced.If at interval doing too smallly, so because the phenomenon that the pressure that temperature distortion and compressive deformation cause is concentrated can be brought fatal negative effect to the reliability aspect of compressor again.
In addition, owing to need insert tip seals 11c, 12c wherein, so the processing operation of seal groove 11b, 12b is a kind of high-precision operation, and this high-precision operation meeting brings the low problem of manufacturing efficiency.In addition, because the Material Selection of end component is subjected to certain restriction, therefore be difficult to guarantee its reliability under the condition of high temperature.
Summary of the invention
In order to overcome the above-mentioned shortcoming that prior art exists, the invention provides a kind of device of anti-axial leakage of scroll compressor, so that it can utilize elastic force that spinning reel is promoted and they are close together to fixing spool direction, thereby area of low pressure and high-pressure area are separated, realize sealing.
The invention provides a kind of device of anti-axial leakage of scroll compressor, it is characterized in that, it is made of thrust-bearing 40 and elastic member 50; Described thrust-bearing 40, it is at main frame 20 and be placed between the spinning reel 12 above the main frame, and for spinning reel can be rotated, and the back side of it and spinning reel keeps sliding contact; Described elastic member 50, it can apply elastic pressure upwards to it to the bottom of described thrust-bearing 40, thereby makes the sheath end of described spinning reel be close to the fixedly bottom of the hardboard of spool; Formed mounting groove on the main frame, it not only can be taken in thrust-bearing wherein, and can guide thrust-bearing to move up and down; Meanwhile, it also is used for fixing described elastic member is installed; And in order to hold the thrust-bearing 40 of being pressed by elastic member 50 elasticity and to guide it to move up and down, the upper end of mounting groove 21 has formed stairstepping; Thrust-bearing 40 is one and possesses certain thickness hollow circle tube parts, the eccentric part 12b of spinning reel 12 passed, thereby make thrust-bearing touch the bottom of hardboard; Elastic member 50 is toroidal, and this annulus is along the curve form of annulus contour waviness, it is alternately contacted with the bottom of thrust-bearing 40 and the bottom surface of mounting groove 21, be the bottom that lower knuckle portion 52 is supported on the mounting groove 21 on the main frame 20, upper bend portion 51 then imposes elastic pressure to thrust-bearing 40.
As mentioned above, the device of the anti-axial leakage of scroll compressor of the present invention can reach following effect, can prevent the low problem of bringing because of leakage of performance.And owing to no longer need tip seals, thereby, can shorten process time thus, enhance productivity also with regard to not needing to carry out the processing of terminal mounting groove, can also prevent simultaneously because of force localization and local rub produce overheated.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the longitdinal cross-section diagram of existing scroll compressor
Fig. 2 is the part amplification sectional view of Fig. 1
Fig. 3 is the amplification sectional view of the A part of Fig. 2
Fig. 4 is the part amplification sectional view of scroll compressor of the present invention
Fig. 5 is the simple sectional view of device of the anti-axial leakage of scroll compressor of the present invention
Fig. 6 is the amplification sectional view of the B part of Fig. 5
Fig. 7 A is the planimetric map of thrust-bearing of device of the anti-axial leakage of scroll compressor of the present invention
Fig. 7 B is the sectional view of Fig. 7 A
Fig. 8 A is the planimetric map of elastic member of device of the anti-axial leakage of scroll compressor of the present invention
Fig. 8 B is the sectional view of Fig. 8 A
Fig. 9 is that the part of the operating state of device under the normal operation situation of the anti-axial leakage of scroll compressor of the present invention is amplified diagrammatic depiction
Figure 10 amplifies diagrammatic depiction for the device of the anti-axial leakage of scroll compressor of the present invention in the part that the operating state under the situation of pressure is arranged
The number in the figure explanation:
C: pressing chamber 11: fixing spool (scroll)
11a: the fixing sheath of spool (Wrap) 12: spinning reel (scroll)
12a: the sheath of spinning reel (Wrap) 20: main frame (main frame)
21: mounting groove 40: thrust-bearing (thrust bearing)
50: elastic member 51: upper bend portion
52: lower knuckle portion
Embodiment
Leakage preventer to scroll compressor of the present invention is illustrated with reference to the accompanying drawings.
Extremely shown in Figure 8 as Fig. 1 and Fig. 4, in scroll compressor of the present invention, upper and lower in sealing shell 1 inside is equipped with main frame 20 and sub-frame 25 respectively, be equipped with above the main frame 20 and be used for compression refrigerant gas and, the motor section 30 that is used for driving above-mentioned press part 10 is housed between main frame 20 and sub-frame 25 press part 10 of its discharge.
Above-mentioned motor section 30 possesses following structure, if on stator 31, connect power supply, be positioned at its inner rotor 32 so and will be rotated motion, and be pressed into live axle 33 at the center of rotor 32, thus live axle 33 can the rotation in drive compression portion 10.
The structure of above-mentioned press part 10: above above-mentioned main frame 20, fixing fixedly spool 11, and fixedly spool possesses the sheath 11a that is involute curve shape with leaving certain intervals.Spinning reel 12 is at main frame 20 and fixedly it also possesses the sheath 12a that is involute curve shape between the spool 11, and its involute curve and fixedly the involute curve of spool have certain phase difference.By fixedly the sheath 11a of spool 11 and the relatively mutual interlock of sheath 12a direction of spinning reel 12 can form pressing chamber C.
Possesses the device of installing in order to reduce axial leakage that prevents axial leakage in addition, it is between main frame 20 and spinning reel 12, spinning reel 12 can be advanced to fixing spool 11 1 side elasticity, thus it can prevent the cold media air of the compressed high pressure of core of pressing chamber laterally low voltage section leak.
Above-mentioned anti-axle direction leakage device is by thrust-bearing 40 and elastic member 50, thrust-bearing 40, and it is between above-mentioned main frame 20 and spinning reel 12, and the back side of it and spinning reel 12 keeps sliding contact; Elastic member 50, it can apply elastic pressure upwards from the bottom of thrust-bearing 40 to it, thereby spinning reel 12 and fixedly sheath 11a, the 12a end of spool 11 are close to respectively on the sealing surface of the fixing hardboard of spool 11 and spinning reel 12.
In addition, top formation of main frame 20 is used for fixing the mounting groove 21 that elastic member 50 is installed, and this mounting groove is the groove that forms along circumference.And in order to hold the thrust-bearing 40 of being pressed by elastic member 50 elasticity and to guide it to move up and down, the upper end of mounting groove 21 has formed stairstepping.
Thrust-bearing 40 is one and possesses certain thickness hollow circle tube parts that such structure can make the eccentric part 12b of spinning reel 12 pass, thereby makes thrust-bearing touch the bottom of hardboard.
Effect and effect to the device of the anti-axial leakage of scroll compressor of the present invention with said structure illustrated below.At first, in scroll compressor, if connect power supply on the stator 31 of motor section 30, rotor 32 will rotate so, and meanwhile, live axle 33 also can rotate along with the rotation of rotor.Along with live axle 33 passes main frame and the eccentric part of rotary driving spool 11, the spinning reel of with the fixed rotating shaft interlock can begin to rotatablely move.
By above-mentioned spinning reel 11 this rotatablely move and the sheath 11a of spinning reel 11 and fixedly the pressing chamber C that forms of the mutual interlock of sheath 12a of spool 12 can move to the center, and volume reduces when moving, thereby can the cold media air that flow into by suction port be compressed.
As mentioned above, thereby the high pressure refrigerant gas after being compressed can be pushed spinning reel 12 open and produce certain interval from fixing spool 11, so the sheath 12a of spinning reel and fixedly spool 11 hardboard portion and fixedly will produce the slit between the hardboard portion of the sheath 11a of spool and spinning reel 12, high pressure air cognition is leaked to low voltage section by this slit, and causes axial leakage.In order to prevent this axial leakage, the discoidal elastic members 50 that are installed in the mounting groove 21 of main frame 20 can keep the thrust-bearing 40 of sliding contact to apply elastic pressure to the bottom with spinning reel 12, thereby make spinning reel 12 keep being close to state on the fixing spool 11.
At this moment, under the effect that rotatablely moves of spinning reel 12, cold media air can be compressed into high pressure from low pressure, in this process, can can increase the axial pressure that spinning reel 12 is pushed open from fixing spool 11 gradually, the elastic pressure of elastic member 50 then can with the equilibrium of the pressure confining force of this variation.
Thus, even under other multiple different operating conditions, still can make the fixing spool 11 and the axial interval of spinning reel 12 keep stable, thereby prevent by the sheath 12a of spinning reel and the hardboard portion of fixing spool 11 and the fixing slit generation axial leakage between the hardboard portion of the sheath 11a of spool and spinning reel 12.
Claims (1)
1. the device of the anti-axial leakage of a scroll compressor is characterized in that, it is made of thrust-bearing (40) and elastic member (50); Described thrust-bearing (40), it is positioned at main frame (20) and is placed between the spinning reel (12) above the main frame, and for spinning reel can be rotated, and the back side of it and spinning reel keeps sliding contact;
Described elastic member (50), it can apply elastic pressure upwards to the bottom of described thrust-bearing (40), thereby makes the sheath end of described spinning reel be close to the fixedly bottom of the hardboard of spool;
Formed mounting groove on the main frame, it not only can be taken in thrust-bearing wherein, and can guide thrust-bearing to move up and down; Meanwhile, it also is used for fixing described elastic member is installed; And in order to hold the thrust-bearing (40) of being pressed by elastic member (50) elasticity and to guide it to move up and down, the upper end of mounting groove (21) has formed stairstepping;
Thrust-bearing (40) is one and possesses certain thickness hollow circle tube parts, the eccentric part (12b) of spinning reel (12) is passed, thereby make thrust-bearing touch the bottom of hardboard;
Elastic member (50) is toroidal, and this annulus is along the curve form of annulus contour waviness, it is alternately contacted with the bottom of thrust-bearing (40) and the bottom surface of mounting groove (21), be the bottom that lower knuckle portion (52) is supported on the mounting groove (21) on the main frame (20), upper bend portion (51) then imposes elastic pressure to thrust-bearing (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031298753A CN100383397C (en) | 2003-05-22 | 2003-05-22 | Axial leakage prevention apparatus for winding shaft compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031298753A CN100383397C (en) | 2003-05-22 | 2003-05-22 | Axial leakage prevention apparatus for winding shaft compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1548762A CN1548762A (en) | 2004-11-24 |
| CN100383397C true CN100383397C (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031298753A Expired - Fee Related CN100383397C (en) | 2003-05-22 | 2003-05-22 | Axial leakage prevention apparatus for winding shaft compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100383397C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205908B (en) * | 2006-12-20 | 2011-09-07 | 乐金电子(天津)电器有限公司 | Bearing arrangement of scroll compressor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202025U (en) * | 1985-05-23 | 1986-08-27 | 湖南省吉首汽车配件厂 | Model ca-155 automobile air compressor |
| CN86103333B (en) * | 1986-05-12 | 1988-11-09 | 任世钧 | Cylinder of double circulating engine |
| CN2168100Y (en) * | 1993-07-03 | 1994-06-08 | 熊春杰 | Vortex type compressor |
| US5383772A (en) * | 1993-11-04 | 1995-01-24 | Tecumseh Products Company | Scroll compressor stabilizer ring |
| JP2000145688A (en) * | 1998-11-11 | 2000-05-26 | Ishikawajima Harima Heavy Ind Co Ltd | Axial force equalizer |
| US6146119A (en) * | 1997-11-18 | 2000-11-14 | Carrier Corporation | Pressure actuated seal |
-
2003
- 2003-05-22 CN CNB031298753A patent/CN100383397C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202025U (en) * | 1985-05-23 | 1986-08-27 | 湖南省吉首汽车配件厂 | Model ca-155 automobile air compressor |
| CN86103333B (en) * | 1986-05-12 | 1988-11-09 | 任世钧 | Cylinder of double circulating engine |
| CN2168100Y (en) * | 1993-07-03 | 1994-06-08 | 熊春杰 | Vortex type compressor |
| US5383772A (en) * | 1993-11-04 | 1995-01-24 | Tecumseh Products Company | Scroll compressor stabilizer ring |
| US6146119A (en) * | 1997-11-18 | 2000-11-14 | Carrier Corporation | Pressure actuated seal |
| JP2000145688A (en) * | 1998-11-11 | 2000-05-26 | Ishikawajima Harima Heavy Ind Co Ltd | Axial force equalizer |
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| Publication number | Publication date |
|---|---|
| CN1548762A (en) | 2004-11-24 |
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Granted publication date: 20080423 |