CN103032314B - For scroll unit and the scroll compressor of scroll compressor - Google Patents
For scroll unit and the scroll compressor of scroll compressor Download PDFInfo
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- CN103032314B CN103032314B CN201110304524.6A CN201110304524A CN103032314B CN 103032314 B CN103032314 B CN 103032314B CN 201110304524 A CN201110304524 A CN 201110304524A CN 103032314 B CN103032314 B CN 103032314B
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- porcupine roller
- scroll
- orbiter
- porcupine
- roller
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Abstract
The invention provides a kind of scroll unit for scroll compressor, comprising: orbiter; Fixed scroll, described fixed scroll engages with orbiter, and along being provided with a pair stepped part be radially oppositely arranged in its circumference within it surface; The shaft coupling of general toroidal, described shaft coupling is arranged between described fixed scroll and described orbiter, for engaging described fixed scroll and described orbiter, wherein said shaft coupling is provided with a pair projection engaged with described a pair stepped part on the surface in its outer circumferential; And neddle roller assembly, neddle roller assembly is arranged in the stepped part of described fixed scroll, with the described projection contacts of described shaft coupling.
Description
Technical field
The present invention relates to a kind of scroll compressor, particularly relate to a kind of scroll compressor with the scroll unit of improvement.
Background technique
Usually, compressor is the potential of compressible fluid changes mechanical energy, can be divided into reciprocal compressor, scroll compressor (or scroll compressor), centrifugal compressor and vane compressor particularly.
Typically, the working principle of scroll compressor is by the basic circle central rotation of orbiter around fixed scroll, and reduces the volume of the gas compression room formed by the joint of orbiter and fixed scroll gradually, thus reaches the object of pressurized gas.Wherein, orbiter directly supports on the support that is fixed in scroll compression engine housing.In addition, the one end (upper end) of the bent axle rotated for driving orbiter is connected to orbiter by the center hole in support, the other end (lower end) directly supports on the lower support frame that is fixed in scroll compression engine housing, thus when bent axle is along when rotating clockwise or counterclockwise, corresponding air-breathing, compression and bleeding can be performed.Wherein be discharged in the hyperbaric chamber of scroll compressor by the gas compressed by escape cock, discharge eventually through floss hole.
Usually, the mode that the key adopting the one-tenth cross on shaft coupling to arrange engages with the shaft coupling groove in scroll, by shaft coupling, orbiter and fixed scroll to be joined together, and to prevent orbiter from while doing translation around the basic circle center of fixed scroll, rotation occurring.In addition, propose another kind of juncture, in the inner surface of fixed scroll, be wherein provided with the stepped part with inner planer surface, and be provided with the projection with exterior planar surface in the outer circumferential of shaft coupling on the surface.Projection coordinates with the stepped part in the inner surface of fixed scroll, and wherein inner planer surface coordinates with exterior planar surface, thus shaft coupling is engaged with fixed scroll.And, circumference along shaft coupling is provided with the projection of the fished beam with inner planer surface/have exterior planar surface, coordinate to protrude with extension orbiter with the joining portion of exterior planar surface/have inner planer surface, thus shaft coupling is engaged with orbiter.By such structure, the key eliminating across layout engages with shaft coupling groove the problem causing moment of torsion.But, in such a configuration, at scroll compressor duration of work, when there is relative displacement between shaft coupling and fixed scroll and/or orbiter, between inner planer surface and exterior planar surface, produce larger sliding friction.
In addition, in the prior art, there is following problem.When orbiter does the revolution translation of minor radius around the basic circle center of fixed scroll, the pressing chamber that the vortex filament structure of orbiter and the vortex filament structure of fixed scroll are formed constantly reduces, produces high temperature and high pressure gas, final two vortex filament structures engage substantially, are discharged in hyperbaric chamber by high temperature and high pressure gas.But, when there is liquid vapour in pressurized gas, along with orbiter constantly turns round translation around the basic circle center of fixed scroll, the spacing between the vortex filament structure of orbiter and the vortex filament structure of fixed scroll is more and more less, and liquid vapour is converged to liquid by compression; Because the density of liquid is comparatively large, can not be further compressed under limited compressive force, makes liquid stay between the vortex filament structure of orbiter and the vortex filament structure of fixed scroll, cause thus and there is a determining deviation between the two.Like this, both hampered the further compression of gas, also making liquid be compressed between two eddy's structures can not easily be discharged, and can apply less desirable larger anti-compression force to Scroll plate structure.
Summary of the invention
An object of the present invention is to provide the scroll unit of the improvement that can be applied in scroll compressor, and described scroll unit at least partly can weaken or eliminate above-mentioned problems of the prior art.
Another object of the present invention is to provide the scroll compressor using above-mentioned scroll unit.
According to an aspect of the present invention, a kind of scroll unit for scroll compressor is provided, comprises: orbiter; Fixed scroll, described fixed scroll engages with described orbiter, and along being provided with a pair stepped part be radially oppositely arranged in its circumference within it surface; The shaft coupling of general toroidal, described shaft coupling is arranged between described fixed scroll and described orbiter, for engaging described fixed scroll and described orbiter, wherein said shaft coupling is provided with a pair projection engaged with described a pair stepped part on the surface in its outer circumferential; And neddle roller assembly, described neddle roller assembly is arranged in the stepped part of described fixed scroll, with the described projection contacts of described shaft coupling.
In one embodiment, described neddle roller assembly comprises multiple porcupine roller and for keeping the elongated porcupine roller retainer of described multiple porcupine roller rotationally.
In one embodiment, each stepped part has the first inner planer surface, and each projection has the second exterior planar surface coordinated with the first inner planer surface.
In one embodiment, described porcupine roller retainer has along the spaced multiple porcupine roller receiving groove of its longitudinal direction, contacted with the second exterior planar surface of described projection with the first inner planer surface of described stepped part respectively by described multiple porcupine roller that described multiple porcupine roller receiving groove holds, make to provide rolling friction between.
In one embodiment, porcupine roller receiving groove described in each has two along described longitudinal direction arcuate side surface respect to one another, and for limiting described porcupine roller rotationally, the radius of curvature of wherein said arc is substantially equal to the radius of curvature of described porcupine roller.
By arranging above-mentioned neddle roller assembly in scroll unit, and between the stepped part in the projection described neddle roller assembly is arranged in the circumferential exterior surface of shaft coupling and the inner surface of fixed scroll, make the operation period at scroll compressor, when there is relative movement between shaft coupling and fixed scroll, described neddle roller assembly provides rolling friction between shaft coupling and fixed scroll.Compared to sliding friction, the frictional loss of rolling friction is less, thus improves overall performance and the stability of scroll unit.
In one embodiment, described neddle roller assembly comprises: multiple porcupine roller; Porcupine roller retainer, described multiple porcupine roller is contained in described porcupine roller retainer; And reed, described reed is arranged in described porcupine roller retainer along the longitudinal direction of described porcupine roller retainer, applies outside thrust to described multiple porcupine roller.
In one embodiment, described porcupine roller retainer comprises two opposing sidewalls along described longitudinal direction, described two opposing sidewalls arrange multiple opening in a staggered manner, be contained in described multiple porcupine roller in described porcupine roller retainer by described multiple opening, described reed thrust lower part expose described porcupine roller retainer; Wherein, described opening is less than the diameter of described porcupine roller along the size of described longitudinal direction.
In one embodiment, described reed has flake shape, and be arranged on from the open part of a sidewall two opposing sidewalls the described porcupine roller that exposes and from the open part of another sidewall two opposing sidewalls between the described porcupine roller that exposes.
In one embodiment, described reed has bellows-shaped, and part is around each porcupine roller described alternately, thus applies outside thrust to each porcupine roller described.
In use, the porcupine roller part exposed from the described opening in a sidewall described two opposing sidewalls contacts with the first inner planer surface of described stepped part, and contacts from the porcupine roller part that the described opening in another sidewall described two opposing sidewalls exposes with described second exterior planar surface of described projection.
By arranging the above-mentioned neddle roller assembly with reed, rolling friction can be provided between shaft coupling and fixed scroll.Compared with sliding friction, the frictional loss of rolling friction is less.
In addition, by scroll unit of the present invention, the existence of liquid vapour in due to pressurized gas, cause can not normally pressurized gas time, the incompressible reaction force that the liquid that liquid vapour assembles formation produces is passed to by the vortex filament structure of scroll the shaft coupling engaged with scroll, and make the porcupine roller in the neddle roller assembly contacted with shaft coupling stressed, pressure is applied to the reed be in contact with it.Reed is under pressure and is out of shape retraction, make also to be bounced back by the porcupine roller of its pushing thereupon, thus provide a little mobile space for shaft coupling, fixed scroll or orbiter are under the drive of shaft coupling, also there is little movement, thus little release spacing is provided between fixed scroll and the vortex filament structure of orbiter.Due to the generation of this spacing, liquid is no longer subject to larger compression extruding, thus along fixed scroll and orbiter eddy's structure, flow out vortex element downwards under gravity, and to be discharged.Because liquid is discharged, make orbiter can do further revolution translation compression around fixed scroll reposefully, thus pressurized gas be discharged in hyperbaric chamber by escape cock further, provide compression efficiency and enhance the stability of structure.
According to a further aspect in the invention, a kind of scroll compressor is also provided, comprises: housing; Support; And scroll unit as above.
Accompanying drawing explanation
These and/or other aspect of the present invention and advantage will become obvious and easy understand below in conjunction with in accompanying drawing description of preferred embodiments, wherein:
Fig. 1 is the sectional view of scroll compressor according to an embodiment of the invention;
Fig. 2 a and 2b is the assembling view of scroll unit according to an embodiment of the invention and the sectional view got along the A-A line in Fig. 2 a respectively;
Fig. 3 a-3c is the plan view of the neddle roller assembly of scroll unit according to an embodiment of the invention, front elevation and perspective view respectively;
Fig. 4 a and 4b is the assembling view of scroll unit according to another embodiment of the present invention and the sectional view got along the B-B line in Fig. 4 a respectively; And
Fig. 5 a-5c is the plan view of the neddle roller assembly of scroll unit according to another embodiment of the present invention, front elevation and perspective view respectively.
Embodiment
Below by embodiment, and 1-5 by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.In the description, same or analogous drawing reference numeral indicates same or analogous parts.The explanation of following reference accompanying drawing to embodiment of the present invention is intended to make an explanation to present general inventive concept of the present invention, and not should be understood to one restriction of the present invention.
Below with reference to the accompanying drawings scroll compressor is according to an embodiment of the invention described.
With reference to figure 1, it illustrates the sectional view of the scroll compressor 100 according to the embodiment of the present invention.Scroll compressor 100 shown in Fig. 1 comprises: scroll compression engine housing 1; Support 2, this support 2 is fixed in scroll compression engine housing 1; Scroll unit 3, this scroll unit 3 is arranged in scroll compression engine housing 1; Lower support frame 4, is fixed on the lower end of described compressor housing 1; Actuating mechanism 5, this actuating mechanism 5 is fixed on the lower end of scroll compressor 100, and it transmits rotatory force by bent axle 6.
Scroll unit 3 comprises fixed scroll 31 and orbiter 32.Orbiter 32 may be used for being supported on rotationally on the support 2 of scroll compressor 100.Fixed scroll 32 may be used for being fixed in scroll compression engine housing 1.Fixed scroll 31 engages with orbiter 32, to form gas compression room 11.Described scroll unit also comprises: the shaft coupling 33 of general toroidal, and this shaft coupling 33 is arranged between fixed scroll 31 and orbiter 32, for engaging fixed scroll 31 and orbiter 32, and can prevent orbiter 32 rotation; And at least one neddle roller assembly 34.The upper end of bent axle 6 is connected with orbiter 32 to fetch and drives described orbiter 32 to rotate, and its lower end is supported on lower support frame 4.Described scroll compressor 100 also comprises escape cock 7, prevents gas backstreaming in described scroll compressor 100 for the gas that discharges in described gas compression room 11.
In one embodiment, on orbiter 32 upper surface that is supported on support 2 or supporting surface.Scroll compression engine housing 1 limits a confined space therein, and is received into wherein by the parts such as above-mentioned scroll unit 3 and support 2.The vortex filament structure of fixed scroll 31 and the vortex filament structure of orbiter 32 cooperatively interact to engage or engage and form gas compression room 11.In the present embodiment, fixed scroll 31 is arranged on the top of orbiter 32.Actuating mechanism 5 is a motor comprising stators and rotators, and this motor drives orbiter 32 by bent axle 6.
When scroll compressor 100 works, from suction port 9 suction gas, after actuating mechanism 5 (such as motor) starts, orbiter 32 is driven by bent axle 6 and by anti-rotation mechanism (such as, shaft coupling 33) constraint, the Plane Rotation of minor radius is done at basic circle center around fixed scroll 31, and then pressure high temperature hot gas is produced in the gas compression room 11 that orbiter 32 and fixed scroll 31 are formed, this pressure high temperature hot gas is discharged in hyperbaric chamber 12 by escape cock 7 along with the movement of orbiter 32, escape cock 7 is now used to prevent the backflow of gas in hyperbaric chamber 12, gas in this hyperbaric chamber 12 final is discharged by relief opening 10.Circulation said process, constantly can produce high temperature and high pressure gas in scroll compressor 100.
In view of the scroll compression principle of scroll compressor 100, squeeze operation and other accessory (although not illustrating) are well known to those of ordinary skill in the art, therefore, be described in this be no longer described in detail about scroll compressor 100 is integrally-built.
Particularly with reference to accompanying drawing 2a and 2b, perspective view and the A-A sectional view of scroll unit 3 are according to an embodiment of the invention shown respectively.As shown in Figure 2 b, in the scroll unit 3 of the scroll compressor 100 according to the embodiment of the present invention, fixed scroll 31 is along being provided with two radially relative stepped part 31a in its circumference within it surface, each stepped part 31a has the first inner planer surface 31a1.Shaft coupling 33 is provided with two the protruding 33a engaged with two stepped part 31a respectively on its outer surface along its circumference, each protruding 33a has the second exterior planar surface 33a1 coordinated with the first inner planer surface 31a1.Described scroll unit 3 also comprises neddle roller assembly 34, and described neddle roller assembly 34 is arranged in the stepped part 31a of fixed scroll 31, contacts with the second exterior planar 33a1 surface scrolls with the first inner planer surface 31a1.
As an example, there are shown in Fig. 2 a and 2b two neddle roller assemblies.But, one of ordinary skill in the art will appreciate that, a neddle roller assembly also can be set.
With reference to figure 3a-3c, the plan view of the neddle roller assembly according to the embodiment of the present invention, front view and perspective view are shown, wherein each neddle roller assembly 34 comprises multiple porcupine roller 34a and for keeping the elongated porcupine roller retainer 34b of multiple porcupine roller 34a rotationally.Porcupine roller retainer 34b has along the spaced multiple porcupine roller receiving groove 34c of its longitudinal direction, contacted with the second exterior planar surface 33a1 of protruding 33a with the first inner planer surface 31a1 of stepped part 31a respectively by multiple porcupine roller 34a that multiple porcupine roller receiving groove 34c holds, make to provide rolling friction between.
Each porcupine roller receiving groove 34c has two along described longitudinal direction arcuate side surface 34c1 and 34c2 respect to one another, for limiting porcupine roller 34a rotationally.In one embodiment, the radius of curvature of arc is substantially equal to the radius of curvature of porcupine roller.
In one embodiment, the length of the second exterior planar surface 33a1 is less than the length of the first inner planer surface 31a1.When scroll compressor 100 works, orbiter 32 does the translation of minor radius around the basic circle center of fixed scroll 31, between the first inner planer surface 31a1 for the stepped part 31a of the second exterior planar surface 33a1 and fixed scroll 31 that prevent the protruding 32a of the shaft coupling 33 of orbiter 32 rotation, there is relative movement, the porcupine roller 34a contacted with the first inner planer surface 31a1 with the second exterior planar surface 33a1 rotates thereupon, thus provides rolling friction between two plat surface.
Fig. 4 a-4b illustrates that its structure is roughly the same with the scroll unit shown in Fig. 2-3, except the structure of neddle roller assembly 34 according to another embodiment of the present invention for perspective view and the B-B sectional view of the scroll unit 3 of scroll compressor.In more detail, with reference in the specific embodiment illustrated in figs.5 a-5 c, each neddle roller assembly 34 comprises: multiple porcupine roller 34a; Porcupine roller retainer 34b, multiple porcupine roller 34a are contained in porcupine roller retainer 34b; And reed 34d, reed 34d are arranged in porcupine roller retainer 34b along the longitudinal direction of porcupine roller retainer 34b, apply outside thrust to multiple porcupine roller 34a.
Porcupine roller retainer 34b comprises two opposing sidewalls 34b1 and 34b2 along described longitudinal direction, two opposing sidewalls 34b1 and 34b2 arrange multiple opening 34b3 in a staggered manner, be contained in multiple porcupine roller 34a in porcupine roller retainer 34b by described multiple opening 34b3, reed 34d pushing effect lower part expose porcupine roller retainer 34b.In one embodiment, opening 34b3 is less than the diameter of porcupine roller 34a along the size of described longitudinal direction.
In one embodiment, reed 34d has sheet bellows-shaped, and part is around each porcupine roller 34a alternately, thus applies outside thrust to each porcupine roller 34a.Reed 34d is arranged on the porcupine roller that partly exposes from the opening 34b3 of sidewall 34b1 and between the porcupine roller partly deducted from the opening 34b3 of sidewall 34b2.
In use, contact with the first inner planer surface 31a1 of described stepped part 31a with the porcupine roller part that the opening in the sidewall of 34b2 exposes from described two opposing sidewalls 34b1, and contact with the first exterior planar surface 32a1 of described protruding 32a with the porcupine roller part that the opening in another sidewall 34b2 exposes from described two opposing sidewalls 34b1.
When scroll compressor 100 works, orbiter 32 does the translation of minor radius around the basic circle center of fixed scroll 31, between the first inner planer surface 31a1 for the stepped part 31a of the second exterior planar surface 33a1 and fixed scroll 31 that prevent the protruding 32a of the shaft coupling 33 of orbiter 32 rotation, there is relative movement, the porcupine roller 34a contacted with the first inner planer surface 31a1 with the second exterior planar surface 33a1 rotates thereupon, thus provides rolling friction between two plat surface.
Further, when there is liquid vapour in pressurized gas, along with orbiter 32 does revolution translation around fixed scroll 31, the gas compression room 11 formed between the vortex filament structure of orbiter and fixed scroll constantly diminishes, and the liquid vapour in pressurized gas is compressed continuously convergence, become liquid.When orbiter revolution translation, when gas compression room 11 diminishes and inwardly extrudes described liquid, because the density of liquid is larger, can not be further compressed, on the contrary a reaction force is applied to orbiter 32 and fixed scroll 31, and this reaction force is delivered on the shaft coupling 33 that engages with orbiter and fixed scroll.After shaft coupling 33 is subject to this reaction force, can outwards move each porcupine roller 34a pushing the neddle roller assembly 34 contacted with the second exterior planar surface 32a1 of its protruding 32a.Due to staggered around the elastic reaction of the reed 34d of each porcupine roller 34a, stressed resiliently deformable, to bounce back to the inside of porcupine roller retainer 34b, each porcupine roller 34a bounces back to the inside of porcupine roller retainer 34b thereupon.So, due to the resiliently deformable effect of reed, permission shaft coupling has a small displacement, thus makes can there be little release gap between the vortex filament structure of orbiter and fixed scroll.Owing to discharging the generation in gap, liquid is no longer subject to large compression extruding force, and can along this small―gap suture, under gravity, flow out scroll unit downwards.Afterwards, because liquid is discharged, orbiter turns round pressurized gas further around fixed scroll, the power be applied on shaft coupling is eliminated, reed is under the effect of selfer power, recover shape, thus promotion porcupine roller exposes porcupine roller retainer from each open part again, thus still can provide the effect of rolling friction.
Although some embodiments of this present general inventive concept have been shown and explanation, those skilled in the art will appreciate that, when not deviating from principle and the spirit of this present general inventive concept, can make a change these embodiments, scope of the present invention is with claim and their equivalents.
Claims (11)
1., for a scroll unit for scroll compressor, comprising:
Orbiter;
Fixed scroll, described fixed scroll engages with orbiter, and along being provided with a pair stepped part be radially oppositely arranged in its circumference within it surface;
The shaft coupling of general toroidal, described shaft coupling is arranged between described fixed scroll and described orbiter, for engaging described fixed scroll and described orbiter, wherein said shaft coupling is provided with a pair projection engaged with described a pair stepped part on the surface in its outer circumferential; And
Neddle roller assembly, neddle roller assembly is arranged in the stepped part of described fixed scroll, with the described projection contacts of described shaft coupling.
2. scroll unit according to claim 1, wherein, described neddle roller assembly comprises multiple porcupine roller and for keeping the elongated porcupine roller retainer of described multiple porcupine roller rotationally.
3. scroll unit according to claim 2, wherein, each stepped part has the first inner planer surface, and each projection has the second exterior planar surface coordinated with the first inner planer surface.
4. scroll unit according to claim 3, wherein, described porcupine roller retainer has along the spaced multiple porcupine roller receiving groove of its longitudinal direction, contacted with described second exterior planar surface of described projection with described first inner planer surface of described stepped part respectively by described multiple porcupine roller that described multiple porcupine roller receiving groove holds, make to provide rolling friction between.
5. scroll unit according to claim 4, wherein, porcupine roller receiving groove described in each has two along described longitudinal direction arcuate side surface respect to one another, and for limiting described porcupine roller rotationally, the radius of curvature of wherein said arcuate side surface equals the radius of curvature of described porcupine roller.
6. scroll unit according to claim 1, wherein, described neddle roller assembly comprises:
Multiple porcupine roller;
Porcupine roller retainer, described multiple porcupine roller is contained in described porcupine roller retainer; And
Reed, described reed is arranged in described porcupine roller retainer along the longitudinal direction of described porcupine roller retainer, applies outside thrust to described multiple porcupine roller.
7. scroll unit according to claim 6, wherein, described porcupine roller retainer comprises two opposing sidewalls along described longitudinal direction, described two opposing sidewalls arrange multiple opening in a staggered manner, be contained in described multiple porcupine roller in described porcupine roller retainer by described multiple opening, described reed thrust lower part expose described porcupine roller retainer;
Wherein, described opening is less than the diameter of described porcupine roller along the size of described longitudinal direction.
8. scroll unit according to claim 7, wherein, described reed has flake shape, and be arranged on from the open part of a sidewall two opposing sidewalls the described porcupine roller that exposes and from the open part of another sidewall two opposing sidewalls between the described porcupine roller that exposes.
9. scroll unit according to claim 8, wherein, described reed entirety is in corrugated, and part is around porcupine roller described in each alternately, thus applies outside thrust to porcupine roller described in each.
10. scroll unit according to claim 9, wherein, the porcupine roller part exposed from the described opening in a sidewall described two opposing sidewalls contacts with the first inner planer surface of described stepped part, and contacts from the porcupine roller part that the described opening in another sidewall described two opposing sidewalls exposes with the second exterior planar surface of described projection.
11. 1 kinds of scroll compressors, comprising:
Housing;
Support; And
Scroll unit according to any one of claim 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110304524.6A CN103032314B (en) | 2011-09-30 | 2011-09-30 | For scroll unit and the scroll compressor of scroll compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110304524.6A CN103032314B (en) | 2011-09-30 | 2011-09-30 | For scroll unit and the scroll compressor of scroll compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103032314A CN103032314A (en) | 2013-04-10 |
| CN103032314B true CN103032314B (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110304524.6A Expired - Fee Related CN103032314B (en) | 2011-09-30 | 2011-09-30 | For scroll unit and the scroll compressor of scroll compressor |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469704A (en) * | 2007-10-31 | 2009-07-01 | 株式会社日立制作所 | Scroll type fluid machine |
| CN102062097A (en) * | 2011-01-26 | 2011-05-18 | 西安交通大学 | Autorotation preventing mechanism for scroll compressor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63266214A (en) * | 1987-04-22 | 1988-11-02 | Daikin Ind Ltd | Ball joint mechanism |
| JPH05180219A (en) * | 1991-12-27 | 1993-07-20 | Ntn Corp | Thrust supporting device for turning member |
| JP2003013871A (en) * | 2001-04-25 | 2003-01-15 | Matsushita Seiko Co Ltd | Rotation hindering device |
| JP2004076709A (en) * | 2002-08-09 | 2004-03-11 | Shiro Sawa | Rotary coupling |
-
2011
- 2011-09-30 CN CN201110304524.6A patent/CN103032314B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469704A (en) * | 2007-10-31 | 2009-07-01 | 株式会社日立制作所 | Scroll type fluid machine |
| CN102062097A (en) * | 2011-01-26 | 2011-05-18 | 西安交通大学 | Autorotation preventing mechanism for scroll compressor |
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| CN103032314A (en) | 2013-04-10 |
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Granted publication date: 20150826 Termination date: 20160930 |