Undisturbed air-flotation magnetomotive suspension device based on double electromagnetic forces

Abstract

The invention relates to an undisturbed air-flotation magnetomotive suspension device based on double electromagnetic forces. In the device, an installation frame is fixed in the middle of a chassis, a chassis lower installing plate is fixed in the lower part; two small air bearings with installation guide bars and a big air bearing with a main rod are arranged on the top plate of the installation frame; a big air bearing with a main rod is arranged under the bottom plate of the installation frame; two symmetrical frictionless cylinders are arranged on the chassis lower installing plate, the piston rods of the frictionless cylinders are connected with a moving beam; the moving beam comprises two symmetrical parts, a main rod and two guide bars are arranged on the moving beam, a magnetomotive system contains two long-stroke moving coils and two shaker iron cores, the shaker iron cores are arranged between the bottom plate and top plate of the installation frame, and the two shaker iron cores are arranged on the two sides of the main rod symmetrically. The suspension device of the invention can effectively eliminate the influence of bending moment on vertical motion, thus the parts in vertical motion can work under undisturbed condition and satisfy frictionless demand.

Description

technical field [0001] The invention belongs to the field of modal test equipment, in particular to an air-floating magnetic suspension device. Background technique [0002] In the modal test of ultra-low frequency specimens, there must be a special low-frequency suspension device to suspend the specimens, and the cylinder suspension frequency should be lower than 1 / 3 to 1 / 5 of the elastic natural frequency of the specimen itself. [0003] When some important tests (such as aerospace ground tests) need to simulate the gravity-free situation, the test process must have a low-frequency suspension device to simulate the weightlessness of the specimen, that is, to simulate the fixed support-free and the special suspension system. Free-free boundary conditions. [0004] As described in the air flotation device that applies the air shaft to the field of vertical frictionless motion disclosed in the "Air Suspension Magnetic Frictionless Suspension Device" with the patent applicati...

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Problems solved by technology

[0006] In order to overcome the deficiencies of the existing air-floating magnetic suspension device under the action of one-way electromagnetic force, which has bending moment influence on the vertical motion, the vertical motion parts work in a disturbed state, and cannot meet the friction-free requirement, the present invention provides a There is a bending moment effect in the vertical motion, so that the vertical moving parts work in a non-disturbance state and meet the friction-free requirements. The non-disturbance air-flotation magnetic suspension device based on double electromagnetic force

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