Porous restrictor for gas bearing

A fluid bearing and porous body technology, which is applied in the field of current limiting devices, can solve problems such as high cost and blockage of small particles, and achieve the effects of reducing labor costs and improving reliability.
CN1561429AInactive Publication Date: 2005-01-05GLOBAL COOLING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GLOBAL COOLING
Publication Date
2005-01-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

A gas restrictor particularly useful for application in gas bearings as used, for example, in free-piston Stirling cycle machinery. Porous strip material (52) together with a backing plate (60) and orifice (32) is used to provide the restriction to the flow of gas into an annular gap (22) between a piston (16) and a cylinder (12).
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Description

technical field

[0001] The present invention relates generally to gas bearings (also known as gas bearings) used in machines such as free piston Stirling machines, and more particularly to flow limiting devices for use with gas bearings. Background of the invention

[0002] In many different mechanical devices, pistons reciprocate within cylinders in housings. Due to precision machining, a small annular gap can be formed between the cylinder wall and the piston wall. For example, in a Stirling cycle machine, the housing encloses a working volume connected to one end of the piston and a rear volume connected to the other end of the piston. The term "piston" generally refers to any piston-like object, including displacers in Stirling cycle machinery. A working gas, such as helium, fills the working space, rear space, and other areas within the housing.

[0003] Because the piston walls are in close proximity to the cylinder walls during operation, the annulus formed between...

Claims

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