Scroll type fluid machinery

F - Mech Eng,Light,Heat,Weapons – 04 – C

Patent

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Details

IPC codes

F04C 2/02 (2006.01) F01C 1/02 (2006.01) F01C 21/00 (2006.01) F04C 18/02 (2006.01)

Type

Patent

Patent number

CA 2044326

Description

7. ABSTRACT The present invention relates to a scroll type fluid machinery provided with a slide type radius of revolution variable mechanism, and has an object of pre- venting unilateral working of a rotating bearing 23 due to tilted rotation of a drive bushing 21 and a balance weight 27 fixed thereto. The construction of the present invention is formed in such a manner that a bolt 41 for regulating tilted rotation is projected at an inner end of a rotary shaft 7, a shaft portion 41a thereof is made to penetrate through a vain hole 42 bored in the balance weight 27, and a bearing surface 41c of a head 41b thereof is brought into slidable contact with the inner end surface of the balance weight 27. When the radius of revolution is varied at the time of revolution in a solar motion of a revolving scroll 14, an eccentric driving pin 25 slides in a slide groove 24 and the shaft portion 41a of the bolt 41 slides in the vain hole 42 at the same time. In the interim, the bearing surface 41c of the head 41 comes into slidable contact with the inner end surface of the balance weight 27, thereby to suppress tilted rotation of the balance weight 27.

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