CN100334355C - Eccentric cam buffering mechanism for rotary shaft of closed rotary compressor - Google Patents
Eccentric cam buffering mechanism for rotary shaft of closed rotary compressor Download PDFInfo
- Publication number
- CN100334355C CN100334355C CNB021581452A CN02158145A CN100334355C CN 100334355 C CN100334355 C CN 100334355C CN B021581452 A CNB021581452 A CN B021581452A CN 02158145 A CN02158145 A CN 02158145A CN 100334355 C CN100334355 C CN 100334355C
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- China
- Prior art keywords
- eccentric cam
- rotating shaft
- eccentric
- annular piston
- rotary compressor
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Abstract
The present invention discloses an eccentric cam buffering mechanism for a rotating shaft of a closed rotary compressor. A rotating shaft is formed at the inner side of a cylinder of a compressor in order to exhaust coolant after sucked and compressed by the compressor, an eccentric cam for transferring rotary force to revolute an annular piston is arranged in a position having a certain distance off the center of the shaft. The eccentric cam performs the function of transferring the rotary force generated by a motor. In the closed rotary compressor provided with the rotating shaft having the eccentric cam, the eccentric cam having a buffering groove is arranged on the inner side of the friction surface of the eccentric part having concentrated weight in the rotating shaft for transferring the rotating force to the annular piston. The load of the shaft is dispersed by a buffering part, the loss of the rotating shaft caused by friction is reduced, the performance of products is enhanced, and the efficiency of the products is increased.
Description
Technical field
The present invention relates to the running shaft of closed rotary compressor, especially be incorporated into the eccentric part of the running shaft of cylinder interior in insertion, be formed with buffer part in the direction that the load effect is arranged, reduce the rotating shaft eccentric cam buffer structure of the closed rotary compressor of running shaft wearing and tearing.
Background technique
Traditional closed rotary compressor as shown in Figure 1, 2, the upside in seal container 10 inside of compressor 1 is equipped with motor part 20, is keeping at a certain distance away with motor part 20, near downside compressor section 30 is installed.Motor part 20 comprises the stator 21 that produces magnetic force according to the power supply that applies; Rotor rotated 22 is pressed into the running shaft 23 that rotating force is transmitted at the center that is fixed on rotor 22 because the magnetic force of stator 21 forms the variation of magnetic flux.Compressor section 30 comprises that the refrigerant that will suck compresses the cylinder 31 of discharging afterwards and being provided with; Be assembled in the top and the bottom of cylinder 31, and in cylinder, form pressing chamber P; Be connected with running shaft 23 respectively, and the upper bearing 32 of supporting rotating shaft and lower bearing 33.
As shown in Figure 3, in the pressing chamber P inboard of cylinder 31, be provided with the eccentric cam 24 that has eccentric part 25 with the eccentric certain distance in axle center of running shaft 23.Contact inserts on the outer circumferential face of eccentric cam 24, and the annular piston 34 that revolves round the sun of the rotating force that transmits according to eccentric cam 24.
Among the figure, the 26, the 27th, the bearing fixture of running shaft, the 42nd, the refrigerant tap hole of upper bearing, the 43rd, exhaust valve assembly, the 44th, baffler, the 45th, refrigerant suction pipe, the 46th, refrigerant discharge tube.
Traditional closed rotary compressor of said structure, when applying power supply for motor part 20, the magnetic flux between stator 21 and the rotor 22 will produce driving force, and driving force transmits by being pressed into the running shaft 23 that is fixed in rotor 22; Eccentric cam 24 is formed on the inside of the cylinder 31 of running shaft 23, on the outer axial face of eccentric cam, insert and be combined with annular piston 34, ring changes piston 34 with outer axial face continuous motion together, when annular piston 34 and baffle plate (not shown) be in the state that is in contact with one another it, annular piston will be to revolve round the sun in the center in the inner space of cylinder 31 with the eccentric cam.
The inner space of pressing chamber is that the outer circumferential face by the inner peripheral surface of cylinder pressing chamber P and annular piston 34 constitutes, revolution by annular piston 34, Volume Changes takes place in the pressing chamber inner space, the refrigerant that this Volume Changes causes high-temperature high-pressure state is inhaled into the inner space of inlet casing by inlet hole 40, is compressed into high-temperature high-pressure state.
But, thrust load acts on the eccentric part 25 of eccentric cam 24 of the running shaft 23 of traditional closed rotary compressor 1, in the running, owing to produce friction between eccentric part 25 outer circumferential faces of the eccentric cam 24 of running shaft 23 and the inner peripheral surface of annular piston 34, caused closed rotary compressor 1 compression performance low, the product performance that the wearing and tearing of eccentric cam 24 cause reduce.
Summary of the invention
Technical problem to be solved by this invention is: provide on a kind of eccentric part of the running shaft in closed rotary compressor inside, direction in the load effect is provided with buffer part, the load of running shaft when reducing running reduces the running shaft wearing and tearing, improves the performance and the efficient of compressor.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of rotating shaft eccentric cam buffer structure of closed rotary compressor, described compressor is discharged after the refrigerant suction is compressed again, cylinder inside at compressor section is formed with running shaft, is provided with the eccentric cam that transmits rotating force for annular piston is revolved round the sun in a distance, off-axis center.Eccentric cam plays the effect of the rotating force of passing on the motor part generation.At the closed rotary compressor of the running shaft that is provided with eccentric cam, running shaft is in order to transmit rotating force to annular piston, and the eccentric part rubbing surface inboard of concentrating in weight is provided with the eccentric cam with dashpot.
Described dashpot is the eccentric part that longitudinal direction connects eccentric cam.
The rotating shaft eccentric cam buffer structure of closed rotary compressor of the present invention, improved because the eccentric part outer circumferential face of the rotating shaft eccentric cam that when compressor operation, produces that rotating shaft eccentric portion load causes and the loss that friction brought between the annular piston inner peripheral surface, direction along the thrust load effect on eccentric cam forms buffer part, the load that disperses axle by buffer portion, the reduce friction loss of the running shaft that causes improves the performance and the efficient of product.
Description of drawings
Fig. 1 is traditional closed rotary compressor sectional arrangement drawing.
Fig. 2 is that the rotating shaft eccentric cam portion of traditional closed rotary compressor enlarges sectional arrangement drawing.
Fig. 3 is traditional closed rotary compressor rotating shaft eccentric cam cross-section profile.
Fig. 4 is a closed rotary compressor sectional arrangement drawing of the present invention.
Fig. 5 is that the rotating shaft eccentric cam portion of closed rotary compressor of the present invention enlarges sectional arrangement drawing.
Fig. 6 is the rotating shaft eccentric cam cross-section profile of closed rotary compressor of the present invention.
Among the figure, P: pressing chamber; 1: compressor; 20: motor part; 21: stator; 22: rotor; 23: running shaft; 124: eccentric cam; 125: eccentric part; 128: dashpot.
Embodiment
Be described in further detail below in conjunction with the rotating shaft eccentric cam buffer structure of the drawings and specific embodiments closed rotary compressor of the present invention:
Shown in Fig. 4,5, closed rotary compressor 1 of the present invention is equipped with motor part 20 in the upper inside of seal container 10, with motor part 20 apart from certain intervals, at downside compressor section 30 is installed.Motor part 20 comprises following structure: the stator 21 that produces magnetic force according to the power supply that applies; Form the variation of magnetic flux and rotor rotated 22 is pressed into the running shaft 23 that rotating force is transmitted at the center that is fixed on rotor 22 according to the magnetic force of stator 21.Compressor section 30 comprises following structure: discharge and the cylinder 31 of setting after the refrigerant that sucks is compressed; Be assembled in the top and the bottom of cylinder 31, and in cylinder, be formed with pressing chamber P, connect also the upper bearing portion 32 and the lower bearing 33 of supporting rotating shaft with running shaft 23 respectively.
As shown in Figure 6, pressing chamber P inboard at cylinder 31, be provided with eccentric cam 124 with the eccentric certain distance in axle center of running shaft 23, in order to reduce eccentric cam 124 with the friction area between top bearing 32 and the lower bearing portion 33, in the top and the bottom of eccentric cam 124, there is end to be formed with top swivel bearing fixture 26 and bottom running shaft fixture 27 poorly.
The axle center of eccentric cam 124 eccentric distance running shafts 23, and connect the dashpot 128 of the circular arc that forms a side projection with the upper side of eccentric part 125 and downside.
With the contact of the outer axial face of eccentric cam 124, and be provided with along eccentric part 125 and can revolve round the sun and the annular piston 34 of the change cylinder 31 compressor P inner spaces of rotation.
Baffle plate (not shown) inserts a side that is fixed on pressing chamber P, and can carry out the straight line back and forth movement along radial direction, one side of baffle plate is linear contacts with the outer axial face of annular piston 34, and according to the pressing chamber P inner peripheral surface of cylinder 31 and the outer circumferential face of annular piston 34 inner space is separated into suction zone and constricted zone.
Among the figure, the 42nd, upper bearing refrigerant tap hole, the 43rd, the bearing fixture of running shaft, the 44th, baffler, the 45th, refrigerant suction pipe, the 46th, refrigerant discharge tube.
The closed rotary compressor of the present invention of structure when applying power supply for motor part 20, will produce driving force according to the magnetic flux change between stator 21 and the rotor 22 as mentioned above, and driving force transmits by being pressed into the running shaft 23 that is fixed in rotor 22; Eccentric cam 124 is formed at the inside of the cylinder 31 of running shaft 23, on the outer axial face of eccentric cam, insert and be combined with annular piston 34, when annular piston 34 and baffle plate (not shown) are under the state that is in contact with one another, annular piston 34 will be to revolve round the sun in the center with eccentric cam 124 in the inner space of cylinder 31.
The inner space of pressing chamber is that the inner peripheral surface of cylinder 31 pressing chamber P and the outer circumferential face of annular piston 34 constitute, revolution by annular piston 34, Volume Changes takes place in the pressing chamber inner space, the refrigerant that this Volume Changes causes high-temperature high-pressure state is inhaled into the inner space of cylinder by inlet hole 40, is compressed into high-temperature high-pressure state.
At this moment, the interface pressure of the outer circumferential face of the eccentric cam 124 of running shaft 23 and annular piston 34 inner peripheral surfaces, can disperse by the dashpot 128 of eccentric part 125, reduce in eccentric part 125 outer circumferential faces of eccentric cam 124 of running shaft 23 and the annular piston 34 axial planes thus because the frictional loss that thrust load brings.
Claims (2)
1, a kind of rotating shaft eccentric cam buffer structure of closed rotary compressor, comprise eccentric cam, after being compressed, the refrigerant suction discharges again, described eccentric cam is located at and departs from rotating shaft center a distance, annular piston is revolved round the sun and transmit the rotating force that motor part produces, it is characterized in that running shaft (23) transmits rotating force in order to give annular piston (34), eccentric part (125) the rubbing surface inboard of concentrating in the weight of eccentric cam (124) is provided with dashpot (128).
2, the rotating shaft eccentric cam buffer structure of closed rotary compressor according to claim 1 is characterized in that described dashpot (128) is the eccentric part (125) that longitudinal direction connects eccentric cam (124).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021581452A CN100334355C (en) | 2002-12-25 | 2002-12-25 | Eccentric cam buffering mechanism for rotary shaft of closed rotary compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021581452A CN100334355C (en) | 2002-12-25 | 2002-12-25 | Eccentric cam buffering mechanism for rotary shaft of closed rotary compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1510279A CN1510279A (en) | 2004-07-07 |
| CN100334355C true CN100334355C (en) | 2007-08-29 |
Family
ID=34236870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021581452A Expired - Fee Related CN100334355C (en) | 2002-12-25 | 2002-12-25 | Eccentric cam buffering mechanism for rotary shaft of closed rotary compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100334355C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511257A (en) * | 2012-11-22 | 2014-01-15 | 广东美芝制冷设备有限公司 | Rotary compressor and crank shaft assembly thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0444221A1 (en) * | 1990-02-26 | 1991-09-04 | Matsushita Refrigeration Company | Vertical rotary compressor |
| JP2001132673A (en) * | 1999-11-04 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Hermetic rotary compressor |
| JP2001153079A (en) * | 1999-11-26 | 2001-06-05 | Matsushita Electric Ind Co Ltd | Closed type multi-cylinder rotary compressor |
| JP2001323884A (en) * | 2000-05-12 | 2001-11-22 | Mitsubishi Electric Corp | Two-cylinder type rotary compressor, assembling jig and assembling method |
| JP2002322993A (en) * | 2001-04-26 | 2002-11-08 | Mitsubishi Electric Corp | Multi-cylinder rotary compressor, method and apparatus of assembling the same |
-
2002
- 2002-12-25 CN CNB021581452A patent/CN100334355C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0444221A1 (en) * | 1990-02-26 | 1991-09-04 | Matsushita Refrigeration Company | Vertical rotary compressor |
| JP2001132673A (en) * | 1999-11-04 | 2001-05-18 | Matsushita Electric Ind Co Ltd | Hermetic rotary compressor |
| JP2001153079A (en) * | 1999-11-26 | 2001-06-05 | Matsushita Electric Ind Co Ltd | Closed type multi-cylinder rotary compressor |
| JP2001323884A (en) * | 2000-05-12 | 2001-11-22 | Mitsubishi Electric Corp | Two-cylinder type rotary compressor, assembling jig and assembling method |
| JP2002322993A (en) * | 2001-04-26 | 2002-11-08 | Mitsubishi Electric Corp | Multi-cylinder rotary compressor, method and apparatus of assembling the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1510279A (en) | 2004-07-07 |
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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 |