Follow-up type air-floating magneto-motive friction-free suspension device

A suspension device and frictionless technology, which is applied to the testing of measuring devices, instruments, machines/structural components, etc., can solve the problems of large nonlinear influence, large error of measurement results, and inability to meet the requirements of frequency criteria, so as to improve detection Accuracy, size reduction effect

Inactive Publication Date: 2008-02-13
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0005] In order to overcome the deficiencies of the existing suspension system that cannot meet the frequency criterion requirements, additional mass, large nonlinear influence, and large error in measurement re

Method used

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  • Follow-up type air-floating magneto-motive friction-free suspension device

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] With reference to Fig. 1, Fig. 2, a kind of follow-up type air-floating magnetic dynamic frictionless suspension device, described frictionless suspension device comprises installation frame 4, moving beam 5, guide bar 22, air suspension system and magnetic system, The air flotation system includes two frictionless cylinders 8, two identical air storage tanks 12, a frictionless cylinder connecting air pipe 21, a precision pressure reducing valve 20, and an air inlet pipe 24; Ring 16, exciter iron core 17; two frictionless cylinders 8 are symmetrically installed above the bottom plate of the installation frame 4, and the frictionless cylinder 8 and the gas storage tank 12 are connected to the air pipe by a frictionless cylinder equal to the diameter of the inner hole of the cylinder 21 connection, the compressed air source is connected to the air storage tank 12 ...

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Abstract

A follow-up air-floating magnetic frictionless suspension device, including an installation frame, a moving beam, a guide rod, an air flotation system and a magnetic system, the air flotation system includes two frictionless cylinders, two air storage tanks, no The friction cylinder is connected to the air pipe, precision pressure reducing valve, and air intake pipe; the magnetic system includes a long-stroke moving coil and an exciter iron core; two friction-free cylinders are symmetrically installed above the bottom plate of the installation frame, and the friction-free cylinder The frictionless cylinder is connected to the air pipe with the air storage tank. The compressed air source is connected to the air storage tank through a precision pressure reducing valve and the air source intake pipe. The piston rod of the frictionless air cylinder is connected to the moving beam through a connecting hinge. The air bearing is installed on the guide rod, the guide rod is fixedly installed on the installation frame, the air path in the moving beam is connected to the air bearing, and a suspension rod is fixed below the moving beam. The invention can also meet the frequency criterion at the time of ultra-low frequency, the additional mass is small enough, the non-linear influence is small, and the test precision is high.

Description

(1) Technical field [0001] The invention belongs to the field of modal test equipment, in particular to a follow-up air-floating magnetic dynamic frictionless suspension device. (2) Background technology [0002] In the modal test of aerospace and some special requirements of specimens, there must be a special low-frequency suspension device to simulate the weightlessness of the specimen, that is, to simulate its fixed-free or free-free boundary conditions through a special suspension system. [0003] In order to reduce the influence of the suspension device on the additional stiffness, additional mass, additional friction and moment of the specimen, the suspension system should meet the frequency criterion and the stability criterion, that is, when the specimen is suspended, the rigid body suspension frequency should be lower than that of the specimen. 1 / 3~1 / 5 of the elastic natural frequency. [0004] At present, when the modal test of ultra-low frequency specimens is car...

Claims

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Application Information

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IPC IPC(8): G01M19/00G01D21/00G01M99/00
Inventor 孙建辉郑欣荣单晓杭赵国军王杨渝
Owner ZHEJIANG UNIV OF TECH
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