Scroll fluid machine and scroll member used therein

Patent metadata

Field	Value
Publication number	US-11326601-B2
Application number	US-201916960282-A
Country	US
Kind code	B2
Filing date	Jan 15, 2019
Priority date	Feb 21, 2018
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

In a scroll compressor (1) provided with a fixed scroll (3) and an orbiting scroll (5), an inclined portion is provided in which the inter-facing surface distance (L) between an end plate (3a) and an end plate (5a) that face each other decreases continuously from the outer peripheral side towards the inner peripheral side. The inclined portion is configured from wall inclined portions (3b1, 5b1) in which the height of a wall (3b, 5b) decreases continuously from the outer peripheral side towards the inner peripheral side, and end plate inclined portions (3a1, 5a1) in which a tooth bottom surface is inclined in accordance with the incline of the wall inclined portions (3b1, 5b1). The inclined portion is provided across a range of no less than 180° around the center of the spiral.

First claim

The invention claimed is:

1. A scroll fluid machine comprising:
a first scroll member having a first end plate on which a spiral first wall is provided;
a second scroll member having a second end plate on which a spiral second wall is provided, the second end plate being disposed to face the first end plate and the second wall meshing with the first wall such that the second scroll member performs a revolution orbiting movement relative to the first scroll member; and
an inclined portion in which an inter-facing surface distance between the first end plate and the second end plate facing each other continuously decreases from an outer peripheral sides of the first wall and the second wall toward inner peripheral sides thereof,
wherein the inclined portion is provided over a range of 180° or more around a center of the spiral,
wherein outermost peripheral portions and/or innermost peripheral portions of the first wall and the second wall are provided with a wall flat portion whose height does not change,
wherein each of the first end plate and the second end plate is provided with an end plate flat portion corresponding to the wall flat portion, and
wherein the wall flat portion and the end plate flat portion are provided over a region of 180° around a center of the scroll member.

2. The scroll fluid machine according to claim 1 ,
wherein at least one of the first wall and the second wall has a wall inclined portion in which a height of the wall continuously decreases from the outer peripheral side toward the inner peripheral side so as to form the inclined portion, and
wherein at least one of the first end plate and the second end plate has an end plate inclined portion in which a tooth bottom surface facing a tooth tip of the wall inclined portion is inclined in accordance with an inclination of the wall inclined portion.

3. The scroll fluid machine according to claim 1 ,
wherein a tooth tip of each of the first wall and the second wall corresponding to the inclined portion is provided with a tip seal that comes into contact with a facing tooth bottom to seal a fluid.

4. The scroll fluid machine according to claim 1 ,
wherein a coating is applied to a tooth tip of the wall and/or a tooth bottom of the end plate that constitutes the inclined portion.

5. The scroll fluid machine according to claim 1 ,
wherein an inclination of the inclined portion is constant with respect to a circumferential direction in which the spiral wall extends.

6. The scroll fluid machine according to claim 1 ,
wherein an inclination of the inclined portion is set to be larger on the outer peripheral side than on the inner peripheral side with respect to a circumferential direction in which the spiral wall extends.

7. A scroll member used for a scroll fluid machine including an end plate and a spiral wall provided on the end plate,
wherein the wall has a wall inclined portion in which a height of the wall continuously decreases from an outer peripheral side toward an inner peripheral side,
wherein the end plate has an end plate inclined portion in which a height of the end plate continuously increases from the outer peripheral side toward the inner peripheral side in accordance with a decrease in height of the wall inclined portion,
wherein the wall inclined portion and the end plate inclined portion are provided over a range of 180° or more around a center of the spiral,
wherein outermost peripheral portions and/or innermost peripheral portions of the wall are provided with a wall flat portion whose height does not change, and/or outermost peripheral portions and/or innermost peripheral portions of the end plate are provided with an end plate flat portion whose height does not change, and
wherein the wall flat portion and/or the end plate flat portion are provided over a region of 180° around a center of the scroll member.

Assignees

• Mitsubishi Heavy Ind Thermal Systems Ltd

Inventors

• Sato Hajime
• Kimata Yoshiyuki
• Ito Takahide

Classifications

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C18/0253

  Details concerning the base · CPC title

• F04C27/001

  Radial sealings for working fluid · CPC title

• F04C2230/91

  Coating · CPC title

• F04C2/025 Primary

  the moving and the stationary member having co-operating elements in spiral form · CPC title