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Flexible spring

A technology of flexible springs and vortex grooves, which is applied in the direction of springs, springs/shock absorbers, and spring components composed of several springs. It can solve the problems of asymmetric motor magnetization structure, direct friction between piston and cylinder, and damage to cylinder and Piston clearance sealing and other issues to achieve the effect of small deformation, uniform stress distribution and large radial stiffness

Inactive Publication Date: 2010-11-24
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to uneven magnetization of the motor, asymmetric structure, etc., the piston is often subjected to lateral force, and this lateral force will destroy the gap seal between the cylinder and the piston, and in severe cases will cause direct friction between the piston and the cylinder adverse consequences of

Method used

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Embodiment Construction

[0017] The specific implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but the protection scope of the present invention should not be limited thereby.

[0018] Flexible spring is a part with a certain rigidity processed on the elastic sheet material according to a specific profile, the thickness is generally 0.2mm ~ 3mm, and its production materials are generally stainless steel spring (1Cr18Ni9Ti), beryllium bronze.

[0019] Profile shape of flexible spring: This invention uses the Fermat curve equation as the basic algorithm to determine the profile line of the spring vortex groove on the flexible spring. There are three profile lines, and the three profile lines are evenly distributed at 120° angles. The following is the profile line mathematical expressions.

[0020] Symbol definitions in the equation:

[0021] A: The radius of the starting point of the vortex groove profile...

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Abstract

The invention discloses a flexible spring, comprising an outer ring spacer and an inner ring spacer. A through hole for a piston shaft is formed at the center of the spring and the outer ring of the spring is provided with a plurality of mounting holes. The invention is characterized in that three spring vortex groove lines are determined by using a Fermat curvilinear equation, wherein the three lines are evenly distributed at 120 degrees; the starting positions and the ultimate positions of the inner side curve and the outer side curve of the vortex groove can be controlled through changing the initiation and generation angle alpha of the vortex groove lines and the grazing angle theta of the vortex groove lines; and the inner side curve and the outer side curve of the vortex groove can be obtained by changing the starting radius A and the vortex coefficient B of the vortex groove lines, which are in different geometric shapes, and the inner and outer side curves are smoothly transited and closed. The flexible spring of the invention has even stress distribution, small local stress and deformation, proper axial rigidity and larger radial rigidity.

Description

technical field [0001] The present invention relates to a spring, in particular to a flexible spring used in a Stirling refrigerator and a free-piston Stirling engine. Background technique [0002] The flexible spring is also called a leaf spring, which is a kind of elastic sheet material that uses mechanical cutting or chemical punching to construct a vortex groove according to a prescribed shape line to form a vortex arm, so that the sheet material has a certain rigidity. Parts are generally used in reciprocating machinery. [0003] This refers to a new type of linear flexible spring used in a linear motor-driven cryogenic refrigerator, which can support the compression piston and the expansion piston, and adjust the phase of the compression piston and the expansion piston by adjusting the natural frequency of the piston vibrator. Poor, maintain the sealing gap between the piston and the cylinder during the movement process, provide sufficient rigidity and a certain strok...

Claims

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Application Information

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IPC IPC(8): F16F3/00
Inventor 陈曦刘颖武卫东张华吴亦农
Owner UNIV OF SHANGHAI FOR SCI & TECH
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