Eccentric sliding assembly with a plurality of dynamic pressure generation mechanisms

Patent metadata

Field	Value
Publication number	US-12104598-B2
Application number	US-202118012857-A
Country	US
Kind code	B2
Filing date	Jul 1, 2021
Priority date	Jul 6, 2020
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

Provided is a sliding component capable of stably reducing the frictional resistance of a sliding surface entailing eccentric rotation. A sliding component has a sliding surface relatively sliding with eccentric rotation, in which the sliding surface includes a land and a plurality of dynamic pressure generation mechanisms arranged in a circumferential direction, the dynamic pressure generation mechanism includes a shallow groove portion and a deep groove portion, and the shallow groove portion surrounds a circumference of the deep groove portion and communicates with the deep groove portion.

First claim

The invention claimed is:

1. An eccentric sliding assembly comprising:
a first sliding component having a sliding surface;
a second sliding component having a sliding surface which is slidable with the sliding surface of the first sliding component; and
an eccentric driving device configured to slide the sliding surface of the first sliding component with the sliding surface of the second sliding component such that a center of the first sliding component imaginarily draws a circle which is eccentric with respect to a center of the second sliding component while keeping non-rotation state of the first sliding component with respect to the center of the first sliding component in a plan view,
the sliding surface of at least one of the first sliding component and the second sliding component includes a land and a plurality of dynamic pressure generation mechanisms arranged in a circumferential direction,
each of the dynamic pressure generation mechanisms includes a shallow groove portion and a deep groove portion deeper than the shallow groove portion,
the shallow groove portion surrounds a circumference of the deep groove portion and communicates with the deep groove portion,
the shallow groove portion surrounds the deep groove portion in an annular shape, and
the shallow groove portion and the deep groove portion are partitioned by a step.

2. The eccentric sliding assembly according to claim 1 , wherein the shallow groove portion is formed in an annular shape, the deep groove portion is formed in a circular shape, and the shallow groove portion and the deep groove portion are concentrically formed.

3. The eccentric sliding assembly according to claim 2 , wherein a depth of the deep groove portion is 10 times or more a depth of the shallow groove portion.

4. The eccentric sliding assembly according to claim 2 , wherein the shallow groove portion is formed shallower on the land side than on the deep groove portion side.

5. The eccentric sliding assembly according to claim 1 , wherein a depth of the deep groove portion is 10 times or more a depth of the shallow groove portion.

6. The eccentric sliding assembly according to claim 5 , wherein the shallow groove portion is formed shallower on the land side than on the deep groove portion side.

7. The eccentric sliding assembly according to claim 1 , wherein the shallow groove portion is formed shallower on the land side than on the deep groove portion side.

Assignees

• Eagle Ind Co Ltd

Inventors

• Suzuki Hiroshi
• Tokunaga Yuichiro

Classifications

• F16C17/045

  with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings · CPC title

• F04C27/008

  for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine · CPC title

• F04C2240/54

  Hydrostatic or hydrodynamic bearing assemblies specially adapted for rotary positive displacement pumps or compressors · CPC title

• F04C29/02

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

• F01C19/005

  Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements (vane construction F01C21/0809; piston rings and ring sealings of similar construction in general F16J9/00) · CPC title