US 2011/0300013 A1 · Scroll fluid machine

Abstract

In the scroll fluid machine in which an orbiting scroll 10 is pivot-driven by a rotary shaft 102 rotatably supported by the casing 100 and a pivot shaft 104 eccentrically and rotatably supported by the rotary shaft 102, as a method, a self-rotation prevention board 109 is attached to one end of the pivot shaft 104 and a self-rotation prevention pin 110 is attached to the self-rotation prevention board 109. The self-rotation prevention pin 110 is configured to perform an orbiting motion while keeping in contact with the inner surface of the self-rotation prevention bearing (guide body) 111. Further, as another method, the outer periphery of one end 104b of the pivot shaft is configure to perform an orbiting motion while keeping in contact with the inner surface of the balance bearing (guide body) 51. Based on these methods, an eccentrically pivot driven orbiting scroll performs an orbiting motion without whirling, and thus a high-speed operation of the scroll fluid machine is enabled.

Claims37

Dependent claims

A scroll fluid machine, comprising:

a rotary shaft, having a stator fixed to a casing, rotatably supported by said casing;
a rotor fixed to said rotary shaft;
a pivot shaft eccentrically and rotatably supported by said rotary shaft;
a self-rotation prevention means for preventing the self-rotation of said pivot shaft;
and
a work part configured with combination of an orbiting scroll, fitted in a pivot drive part of said pivot shaft, having spiral wraps on both surfaces, and a pair of fixed scrolls fixed to one end of said casing, wherein:
said pivot shaft passes through said work part;
a fixed scroll located at the most outer part has a guide body;
and
one end of said pivot shaft performs an orbiting motion guided by said guide body.

7 more elements

A scroll fluid machine, comprising:

a rotary shaft, having a stator fixed to a casing, rotatably supported by said casing;
a rotor fixed to said rotary shaft;
a pivot shaft eccentrically and rotatably supported by said rotary shaft;
a self-rotation prevention means for preventing the self-rotation of said pivot shaft;
and
a pair or pairs of work parts configured with combination of an orbiting scroll, fitted in a pivot drive part of said pivot shaft, having spiral wraps on both surfaces, and a fixed scroll, fixed to one end of said casing, having spiral wraps, and
a pair or pairs of work parts configured with combination of an orbiting scroll, fitted in a second pivot drive part of said pivot shaft, having spiral wraps on both surfaces, and a fixed scroll, fixed to the other end of said casing, having spiral wraps, wherein:
one end of said pivot shaft passes through said work part on one end side, a fixed scroll located at the most outer part on one end side has a guide body, and one end outer periphery of said pivot shaft performs an orbiting motion guided by said guide body on one end side;
and
the other end of said pivot shaft passes through said work part on the other end side, a fixed scroll located at the most outer part on the other end side has a guide body, and the other end outer periphery of said pivot shaft performs an orbiting motion guided by said guide body on the other end side.

7 more elements

A scroll fluid machine, comprising:

(1) a rotary shaft, having a stator fixed to a casing, rotatably supported by said casing;
(2) a rotor fixed to said rotary shaft;
(3) a pivot shaft eccentrically and rotatably supported by said rotary shaft;
a self-rotation prevention means for preventing the self-rotation of said pivot shaft;
(4) a self-rotation prevention means for preventing the self-rotation of said pivot shaft;
and
(5) four sets of work chambers configured with combination of a fixed scroll having wraps on one surface, an orbiting scroll having wraps on both surfaces, a fixed scroll having wraps on both surfaces, an orbiting scroll having wraps on both surfaces, and a fixed scroll having wraps on one surface, with the wraps combined with each other in this order, wherein:
said two orbiting scrolls are attached in series to said pivot shaft;
a hole that allows said pivot shaft to pass through and perform an orbiting motion, is provided at the paneling of said three fixed scroll;
a balance bearing is provided in the center part of the paneling of the fixed scroll that is located at the most outer part;
and
the outer periphery of the pivot shaft tip performs an orbiting motion while keeping in contact with the inner surface of the inner race of said balance bearing.

9 more elements

Dependencies are inferred from the claim text.

Scroll fluid machine

Life of this patent

Scroll fluid machine

Life of this patent

Abstract

Claims37