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Continuous and accurate variable loading device

A loading device and load technology, which is applied to measuring devices, instruments, scientific instruments, etc., can solve the problems of unstable load changes and inability to accurately control the load, and achieve the effect of increasing accuracy

Inactive Publication Date: 2016-03-30
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the liquid impact force (hydraulic force) of the hydraulic pump, the load change is not stable, and the changing load cannot be accurately controlled

Method used

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  • Continuous and accurate variable loading device
  • Continuous and accurate variable loading device

Examples

Experimental program
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Effect test

Embodiment 2

[0037] Case 2 as Figure 4 As shown, in this case, the device of the present invention is applied to the test of fatigue mechanical properties of bearings on high-speed railways, advanced automobiles or fighter jets, and the corresponding load spectrum can be easily drawn.

[0038] In this case, the bearing 10 is fixed on the bearing seat 11, and the slider 12 with the collar can move linearly on the shaft 9 through the collar. A linear motor is used to control the slider to move on the shaft, and further control the magnitude of the torque applied to the support point. Through this continuous and precise change of the torque, a continuous and precise change of the value of the loading force is achieved.

[0039] By continuously and accurately changing the loading force, the mechanical properties of the bearing under continuous loading force are tested, and the load spectrum is listed. Thereby, there is a more accurate understanding of the performance of the bearing, which i...

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PUM

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Abstract

The invention discloses a continuous and accurate variable loading device. A mobile loading device mainly comprises a linear motor, a slide block, a loading counterweight and a slide rail on an equalizing beam. The loading counterweight is connected to the bottom of the slide block through a threaded rod. One end of the slide rail is provided with a horizontal shaft in parallel and the other end of the slide rail is loaded. The slide block is movably sleeved through the horizontal shaft and moves along the slide rail. The horizontal shaft is coaxially connected to an output shaft of the linear motor. The loading counterweight has fixed weight. Through synchronous movement of the slide block and the loading counterweight between a support point and the linear motor along the slide rail, continuous and accurate control of the load is realized. Through control of a distance between the slide block and the support point, continuous and accurate change of a load is realized and continuous and accurate loading is realized.

Description

technical field [0001] The present invention relates to a loading device, in particular to a device with continuous and precise loading of variable loads. Background technique [0002] In order to simulate the structural response of the structure under the actual stress working state, the engineering structure test must apply a load to the test object. At present, the loading methods of commonly used loading devices are as follows, and the loading methods and corresponding imperfections are as follows: [0003] (1) Weight loading. Change the weight of the weight, the load change is not continuous. [0004] (2) Cam loading. If you need to change a variable load sequence, you need to change the cam, and the cost is too high. [0005] (3) Hydraulic loading. Due to the action of the liquid impact force (hydrodynamic force) of the hydraulic pump, the load change is not stable, and the changing load cannot be precisely controlled. SUMMARY OF THE INVENTION [0006] In order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02
Inventor 张勇强陈李果汪久根张靖
Owner ZHEJIANG UNIV
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