Scroll fluid machine having injection holes through which lubricant is injected to the orbiting bearing

Patent metadata

Field	Value
Publication number	US-11041387-B2
Application number	US-201615761981-A
Country	US
Kind code	B2
Filing date	May 10, 2016
Priority date	May 10, 2016
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

The purpose of the present invention is to provide a scroll fluid machine configured so that, during maintenance, grease can be easily supplied to a bearing regardless of an installation environment, thereby improving work efficiency. The present invention provides a scroll fluid machine characterized by comprising: a stationary scroll obtained by forming a wrap section on an end plate; an orbiting scroll obtained by forming a wrap section on an end plate such that the wrap section faces the wrap section of the stationary scroll; a drive shaft for driving the orbiting scroll; an orbiting bearing for supporting the drive shaft relative to the orbiting scroll; and a plurality of pouring openings for pouring a lubricant into the orbiting bearing from the outside.

First claim

The invention claimed is:

1. A scroll fluid machine, comprising:
a stationary scroll which is provided with a wrap in an end plate;
an orbiting scroll which is provided with a wrap facing the wrap of the stationary scroll in an end plate;
a drive shaft which drives the orbiting scroll;
an orbiting bearing which supports the drive shaft with respect to the orbiting scroll; and
a plurality of injection holes through which a lubricant is injected to the orbiting bearing from an outer portion;
wherein the orbiting scroll includes a boss plate portion which is connected to the drive shaft;
wherein a projection formed in an end plate surface of the boss plate portion protrudes from the boss plate portion toward the end plate of the orbiting scroll; and
wherein the plurality of injection holes through which the lubricant is injected to the orbiting bearing from the outer portion is provided in the projection.

2. The scroll fluid machine according to claim 1 ,
wherein a plurality of the injection holes are provided in a bearing housing which stores the orbiting bearing.

3. The scroll fluid machine according to claim 1 ,
wherein tip ends of the plurality of injection holes are formed to face different directions.

4. The scroll fluid machine according to claim 1 ,
wherein each of the injection holes is configured to connect to a lubricant feeding tool.

5. The scroll fluid machine according to claim 4 ,
wherein a tip end of the each of the injection holes is variable in direction.

6. The scroll fluid machine according to claim 4 , comprising:
a casing which is mounted in the stationary scroll and provided on an outside in a radial direction of the orbiting scroll,
wherein a plurality of openings are provided in the stationary scroll or the casing, and
wherein tip ends of at least two injection holes face directions of different openings.

7. The scroll fluid machine according to claim 6 , comprising:
a rotation preventing machine which prevents the orbiting scroll from rotating,
wherein a straight line connecting the opening with the injection hole passes between a plurality of the rotation preventing machines.

8. The scroll fluid machine according to claim 4 , comprising:
a casing which is mounted in the stationary scroll and provided on an outside in a radial direction of the orbiting scroll,
wherein a plurality of openings are provided in the stationary scroll or the casing, and
wherein tip ends of at least two injection holes face directions of a same opening.

9. The scroll fluid machine according to claim 4 ,
wherein the lubricant passes through each of the injection holes from an outer portion of a bearing housing which stores the orbiting bearing toward an inner portion, and does not pass through from the inner portion to the outer portion.

10. The scroll fluid machine according to claim 1 ,
wherein a guide for supplying grease is formed in a cooling fin provided in the orbiting scroll, the boss plate portion, or the casing.

11. The scroll fluid machine according to claim 1 ,
wherein a grease reservoir is disposed inside of the projection.

12. A scroll fluid machine, comprising:
a stationary scroll;
an orbiting scroll which is provided to face the stationary scroll;
a casing which stores the orbiting scroll;
a drive shaft which drives the orbiting scroll; and
a plurality of rotation preventing machines which prevent the orbiting scroll from rotating,
wherein a bearing housing to store the plurality of rotation preventing machines is provided on a side near each of the casing and the orbiting scroll,
wherein at least one of the plurality of rotation preventing machines is provided with a plurality of injection holes which inject a lubricant from each outer portion to the bearing housing on a side of each of the casing and the orbiting scroll,
wherein the orbiting scroll includes a boss plate portion which is connected to the drive shaft,
wherein a projection formed in an end plate surface of the boss plate portion protrudes from the boss plate portion toward the end plate of the orbiting scroll, and
wherein the plurality of injection holes to inject the lubricant into the bearing housing on a side near the orbiting scroll is provided in the projection.

13. The scroll fluid machine according to claim 12 ,
wherein tip ends of the plurality of injection holes face different directions.

14. The scroll fluid machine according to claim 12 ,
wherein each of the injection holes is configured to connect to a lubricant feeding tool.

15. The scroll fluid machine according to claim 14 ,
wherein a tip end of each of the injection holes is variable in direction.

16. The scroll fluid machine according to claim 14 ,
wherein a plurality of openings are provided in the stationary scroll or the casing, and
wherein tip ends of at least two injection holes face directions of different openings.

17. The scroll fluid machine according to claim 14 , comprising:
a casing which is mounted in the stationary scroll and provided on an outside in a radial direction of the orbiting scroll,
wherein a plurality of openings are provided in the stationary scroll or the casing, and
wherein tip ends of at least two injection holes face directions of a same opening.

18. The scroll fluid machine according to claim 14 ,
wherein the lubricant passes through each of the injection holes from an outer portion of the bearing housing toward an inner portion, and does not pass through from the inner portion to the outer portion.

19. The scroll fluid machine according to claim 12 ,
wherein a guide for supplying grease is formed in a cooling fin provided in the orbiting scroll, the boss plate portion, or the casing.

Assignees

• Hitachi Industry Equipment Systems Co Ltd

Inventors

• Watanabe Sho
• Kobayashi Yoshio
• Kanemoto Yoshiyuki

Classifications

• F04C29/02 Primary

  Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D) · CPC title

• F04C2240/30

  Casings or housings · CPC title

• F01C21/04 Primary

  Lubrication (of machines or engines in general F01M) · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F04C18/02

  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