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Scroll type fluid machine

a fluid machine and roll type technology, applied in the direction of machines/engines, liquid fuel engines, rotary piston liquid engines, etc., can solve the problems of increasing the weight of the components, increasing the amount of centrifugal force applied, increasing the cost, etc., to improve the durability of the interlocking mechanism, reduce the amount of space required, and reduce the centrifugal force exerted on the interlocking mechanism.

Inactive Publication Date: 2012-11-15
ANEST IWATA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]In consideration of these problems in the related art, an object of the present invention is to realize an interlocking mechanism which is capable of transmitting a rotary force from a driving scroll to a driven scroll with stability, and which can be increased in lifespan and reduced in cost.

Problems solved by technology

Furthermore, it is necessary to increase a durability of the interlocking mechanism 122, and for this purpose, the columnar solid body 124, the columnar projecting portions 126, 128, and so on must be manufactured from high strength materials, leading to an increase in cost.
Moreover, when these components are manufactured from a high strength material such as a steel material, the weight of the components increases, and as a result, the applied centrifugal force increases further.

Method used

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Experimental program
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first embodiment

[0039]A first embodiment in which the present invention is applied to a scroll type compressor will be described below on the basis of FIGS. 1 to 6. In FIGS. 1 to 3, a scroll type compressor 10A according to this embodiment includes a driving scroll 12 and a driven scroll 22 disposed to be mutually interlocked. The driving scroll 12 is constituted by a disc-shaped end plate 14 and a spiral lap 16 formed integrally with the end plate 14, and is driven to rotate by a drive shaft 18 that is coupled to the end plate 14 by a bolt. The drive shaft 18 is coupled to a driving motor (not shown).

[0040]The driven scroll 22 is constituted by a disc-shaped end plate 24 and a spiral projection 26 formed integrally with the end plate 24, and a driven shaft 28 is coupled to the end plate 24 by a bolt 27. A discharge port 29 for discharging a compressed compressible fluid is provided in a center of the end plate 24. A rotary center O2 of the driven shaft 28 is positioned to be offset from a rotary c...

second embodiment

[0050]Next, a second embodiment in which the present invention is applied to a scroll compressor will be described using FIG. 7. In an interlocking mechanism 42B according to this embodiment, instead of forming the bearing layer 50a on the outer peripheral surface of the rotary body 50 and the inner peripheral surface of the eccentric hole 51, a rolling bearing (a roller bearing) 60 is interposed in the sliding surface between the recessed portion 48 and the rotary body 50, and a needle bearing 62 is interposed in the sliding surface between the eccentric hole 51 and the pin member 52. All other configurations are identical to the first embodiment.

[0051]By providing the interlocking mechanism 42B according to this embodiment with the rolling bearing 60 and the needle bearing 62, relative rotation between the recessed portion 48 and the rotary body 50 can be performed more smoothly. Further, grease can be sealed easily into the rolling bearing 60 and the needle bearing 62, and theref...

third embodiment

[0052]Next, a third embodiment of the apparatus according to the present invention will be described using FIGS. 8 to 10. In a scroll compressor 10B according to this embodiment, an outer diameter of the end plate 24 of the driven scroll 22 is formed to be larger than an outer diameter of the end plate 14 of the driving scroll 12. An opposing surface 70a of a coupling cap 70 is disposed to face the back surface 14c side of the end plate 14. A through hole 72 through which the drive shaft 18 passes is provided in a center of the coupling cap 70. Further, coupling portions 74 that project toward the end plate 24 side are formed integrally with the coupling cap 70 at equal intervals in three locations on an outer peripheral end thereof.

[0053]The coupling portions 74 are provided in positions opposing lower step surfaces 44b and 46b of the respective bases 44 and 46, and joined to the lower step surfaces 44b, 46b by bolts. In an interlocking mechanism 42C according to this embodiment, t...

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PUM

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Abstract

To realize an increase in lifespan and a reduction in cost in an interlocking mechanism that causes a driving scroll and a driven scroll to rotate synchronously, a through hole is drilled into a peripheral edge portion of a driving scroll side end plate, and a pin member is fixed to the through hole. A base is provided on a driven scroll side spiral projection that faces the through hole. A columnar recessed portion is carved into an opposing surface of the base, and an aluminum rotary body is loosely fitted into the recessed portion. An eccentric hole is drilled into the rotary body, and the pin member is loosely fitted into the eccentric hole. The interlocking mechanism is disposed in an odd number at equal intervals on an outer edge portion of the scroll end plate such that loads exerted on the rotary body act in an identical plane.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a scroll type fluid machine that functions as a compressor, an expander, or a vacuum pump, and more particularly to a double rotation type scroll fluid machine in which a driving scroll and a driven scroll forming a pair rotate in synchronization with each other.[0003]2. Description of the Related Art[0004]In a double rotation type scroll fluid machine in which a driven scroll is driven to rotate in synchronization with rotation of a driving scroll, an interlocking mechanism that causes the driving scroll and the driven scroll to rotate synchronously may employ an Oldham system, a system in which a pin is guided through a ring, a system in which a roller is guided through a recess, a pin crank system, and so on. Japanese Patent Application Publication No. S64-302 discloses the Oldham system, Japanese Patent Application Publication No. H1-267379 discloses the system in which a pin is guid...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01C1/02
CPCF01C1/0215F01C1/0253F04C2240/52F01C17/06
Inventor SATO, KAZUAKI
Owner ANEST IWATA CORP
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