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Adaptive conjugated resonant type spring fatigue experimental machine

A fatigue experiment and self-adaptive technology, applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., can solve the problems of spring stiffness drop, size change, broken spring, etc., and achieve stable amplitude, convenient maintenance, long life effect

Inactive Publication Date: 2006-01-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Springs that have not been subjected to fatigue screening tests often experience stiffness reduction, size changes, and even failure phenomena such as broken springs during use.

Method used

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  • Adaptive conjugated resonant type spring fatigue experimental machine
  • Adaptive conjugated resonant type spring fatigue experimental machine
  • Adaptive conjugated resonant type spring fatigue experimental machine

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

[0014] Such as figure 1 As shown, the self-adaptive conjugate resonance type spring fatigue testing machine of the present invention includes a vibration system and a control circuit. The vibration system is a dynamic force closed system, which consists of two vibration subsystems with identical mass, stiffness and spring position, namely figure 1 Subsystem 1 and Subsystem 2 shown in , the two vibrating subsystems are set opposite to each other in a rigid support. Subsystem one includes an upper plate 5 , a middle plate 7 and a lower plate 9 arranged up and down, and a plurality of springs 8 arranged symmetrically between the upper plate 5 and the middle plate 7 and between the middle plate 7 and the lower plate 9 . The upper plate 5 is provided with internal thread through holes, the middle plate 7 is provided with through holes at the same pos...

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Abstract

The present invention discloses an adaptive conjugate resonant spring fatigue testing instrument. It includes vibration system and control circuit. Said vibration system is a dynamic force closed system formed from two vibrator systems with identical quality, rigidity and spring position. Said invention also provides the concrete structure of said vibrator system. Its control circuit includes successively-connected sensor, feedback control circuit, amplitude-stabilizing circuit, exciter power supply and exciter, etc.

Description

technical field [0001] The invention relates to a workpiece fatigue test device, in particular to a spring fatigue test machine. Background technique [0002] Spring is one of the basic parts of industrial products. It plays the role of energy storage, automatic control, buffer balance, return positioning, safety insurance and so on during the service process. Therefore, it is widely used in aerospace, national defense equipment, electromechanical equipment, instrumentation, petrochemical, agricultural machinery, transportation energy and daily necessities. If the spring fails, unpredictable losses will occur. For example, if the valve spring of the engine is broken, the valve will fall into the cylinder, and the piston will collide with the valve when it moves up and the cylinder will be broken; the plug spring of the high-pressure oil pump will fail, and the oil pump will not be able to supply oil. [0003] Spring fatigue test is the key process of spring performance tes...

Claims

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Application Information

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IPC IPC(8): G01N3/34G01M13/00
Inventor 唐琦张宝欢史春涛秦德夏淑敏张宝如
Owner TIANJIN UNIV
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