Scroll fluid machine with concave and convex portions in the spiral laps

Patent metadata

Field	Value
Publication number	US-11118583-B2
Application number	US-201515578093-A
Country	US
Kind code	B2
Filing date	Jun 3, 2015
Priority date	Jun 3, 2015
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

The present invention makes a lap clearance between a fixed scroll and an turning scroll as small as possible to suppress leakage of compressed fluid from a compression chamber in a compression operation, thereby improving a compression efficiency. Provided is a scroll-type fluid machine characterized by comprising: a fixed scroll having a scroll lap portion; and an orbiting scroll that is provided to face the fixed scroll and that has a scroll lap portion turning so as to form a plurality of compression chambers in a clearance relative to the lap portion of the fixed scroll, wherein the lap portion of at least one of the fixed scroll and the turning scroll is provided with, in a predetermined region, a recessed portion on one lateral surface thereof and a protruding portion on the other lateral surface thereof.

First claim

The invention claimed is:

1. A scroll fluid machine comprising:
a fixed scroll including a spiral-shaped lap part; and
an orbiting scroll which is provided facing the fixed scroll and which includes a spiral-shaped lap part, wherein
in a portion where a deformation amount of an outer line of a tooth joint side of one of the lap part of the fixed scroll and the lap part of the orbiting scroll is smaller than a deformation amount of an inner line of a tooth tip side of the lap part facing the one lap part, a convex portion is provided in at least one of the outer line of the tooth joint side of the one lap part and the inner line of the tooth tip side of the lap part facing the one lap part, and
in a portion where a deformation amount of the outer line of the tooth joint side of the one lap part is larger than a deformation amount of the inner line of the tooth tip side of the lap part facing the one lap part, a concave portion is provided in at least one of the outer line of the tooth joint side of the one lap part and the inner line of the tooth tip side of the lap part facing the one lap part.

2. The scroll fluid machine according to claim 1 , wherein the concave portion or the convex portion is formed only in a portion in a height direction of the lap part of the fixed scroll or the orbiting scroll.

3. The scroll fluid machine according to claim 1 , wherein the lap part of at least one of the fixed scroll and the orbiting scroll includes a concave portion and a convex portion provided in one lateral surface between a tooth bottom and a tooth tip in a predetermined region.

4. The scroll fluid machine according to claim 1 , wherein the convex portion or the concave portion is formed by cutting process of the lap part.

5. The scroll fluid machine according to claim 1 , wherein
the concave portion or the convex portion has a varying concave amount or convex amount between a tooth bottom and a tooth tip.

6. The scroll-type fluid machine according to claim 1 , wherein at least one of the lap part of the fixed scroll and the orbiting scroll includes a plurality of protrusions provided except in a region where the convex portion is provided.

7. The scroll-type fluid machine according to claim 1 , wherein at least one of the lap part of the fixed scroll and the orbiting scroll includes a plurality of protrusions provided also in a region where the convex portion is provided.

8. The scroll-type fluid machine according to claim 1 , wherein the convex portion and the concave portion are provided in a plurality of regions of at least one of the lap part of the fixed scroll and the orbiting scroll.

9. The scroll fluid machine according to claim 1 , wherein the convex portion is formed in different sizes depending on a region and on a deformation amount while in operation of the fixed scroll and the orbiting scroll.

10. A scroll fluid machine comprising:
a fixed scroll including a spiral-shaped lap part; and
an orbiting scroll which is provided facing the fixed scroll and which includes a spiral-shaped lap part, wherein
in a portion where a deformation amount of an inner line of a tooth joint side of one of the lap portion of the fixed scroll and the lap portion of the orbiting scroll is smaller than a deformation amount of an outer line of a tooth tip side of the lap portion facing the one lap portion, a concave portion is provided in at least one of the inner line of the tooth joint side of the one lap portion and the outer line of the tooth tip side of the lap portion facing the one lap portion, and wherein
in a portion where a deformation amount of the inner line of the tooth joint side of the one lap portion is larger than a deformation amount of the outer line of the tooth tip side of the lap portion facing the one lap portion, a convex portion is provided in at least one of the inner line of the tooth joint side of the one lap portion and the outer line of the tooth tip side of the lap portion facing the one lap portion.

Assignees

• Hitachi Industry Equipment Systems Co Ltd

Inventors

• Watanabe Sho
• Sakamoto Susumu
• Kobayashi Yoshio
• Iwano Kiminori

Classifications

• F04C18/0269 Primary

  Details concerning the involute wraps · CPC title

• F04C18/02 Primary

  of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title