Hydraulic servo variable load loading test bench

A loading test and hydraulic servo technology, which is applied in the field of fatigue test benches, can solve the problems of slow response and small output load range, and achieve the effects of low cost, compact structure, and adjustable loading frequency

Active Publication Date: 2017-02-01
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its response is slow, and the output load range is small, etc.

Method used

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  • Hydraulic servo variable load loading test bench
  • Hydraulic servo variable load loading test bench

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Embodiment Construction

[0012] The implementation of the present invention will be further described in detail below in conjunction with the drawings and technical solutions.

[0013] The hydraulic servo variable load loading test bench is composed of two parts: the control system and the loading mechanism;

[0014] The hydraulic servo variable load loading test bench has four parallel loading mechanisms, two of which are used for axial loading and the other two are used for radial loading. Each loading mechanism is fixed on the horizontal ground through bolts and baffle plates, and the servo hydraulic cylinder 20 and the base 25 are connected with 12 bolts. The front end of the servo hydraulic cylinder 20 for axial loading is equipped with a force sensor 18 , and the front end of the servo hydraulic cylinder 20 for radial loading is connected with a small force sensor 19 . The displacement sensor 17 is installed at the rear of the servo hydraulic cylinder 20 , and the servo valve 16 and the pressur...

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Abstract

The invention discloses a hydraulic servo variable-load loading test bench, belongs to the field of mechanical hydraulic pressure, and relates to a fatigue test bench using an electro hydraulic servo system and being capable of realizing pressure and displacement feedback double closed loop control. The test bench consists of a control system and four loading mechanisms in parallel connection, wherein two of the four loading mechanisms in parallel connection are used for loading in the axial direction, and the other two of the four loading mechanisms in parallel connection are used for loading in the radial direction. In the control system, an industrial personal computer and a controller are connected through a data wire; and a displacement sensor and large and small force sensors are connected to the controller through data transmission wires. The loading test bench is fixed on the ground; the large force sensor for loading in the axial direction is mounted at the front end of one servo hydraulic cylinder; and the small force sensor for loading in the radial direction is mounted at the front end of the other servo hydraulic cylinder. Four control channels of the hydraulic servo variable-load loading test bench can work together; and the test bench has the advantages of simple structure, clear principle, low cost, stable long-term operation and high efficiency, and can synchronously carry out the fatigue loading for a plurality of samples.

Description

technical field [0001] The invention belongs to the field of mechanical hydraulics, and relates to a fatigue test bench which uses an electro-hydraulic servo system and can realize double closed-loop control of pressure and displacement. Background technique [0002] In construction machinery, many mechanical parts work under cyclic and alternating load conditions, and their working stress is often lower than the yield strength of the material. Under such cyclic and alternating loads, components are prone to fatigue damage after a long period of operation, which has a significant impact on the safety performance of the structure. In order to ensure the reliability of these components, they must be tested before they are put into use. The electro-hydraulic servo loading test bench is a special equipment for testing these components. [0003] In recent years, great attention has been paid to the dynamic and static fatigue experiments of materials or structures. Fatigue test e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B19/00
Inventor 张宏李巍高铭熊子奇
Owner DALIAN UNIV OF TECH
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