Axial magnetic bearing static characteristic testing device

Abstract

An axial magnetic bearing static characteristic testing device is mainly composed of a loading and measuring system, a tested axial magnetic bearing, an axial rotor sliding mechanism and a stator fixing mechanism. The axial magnetic bearing static characteristic testing device is characterized in that the loading and measuring system comprises a locking nut, a loading rotary cover, a loading screw rod, a sleeve end cover, deep groove ball bearings, a sleeve, small nuts, a moving rod, thrust plates, a forcemeter, displacement sensors, a loading clamp and a loading base; the tested axial magnetic bearing comprises a rotor and a stator; the axial rotor sliding mechanism comprises upper pressing blocks, an upper pressing block press rod, an upper pressing block press nut, a transition plate, a slider, slide rails, a slide rail base, end plates, slide rail mounting bases and an axial rotor moving rod; the stator fixing mechanism comprises an upper V-shaped block, press rods, adjusting nuts, lower half V-shaped blocks, a guide rail seat, locking screws, press bars, nuts, screw rods and a base. The testing device has the advantages that the measuring process is simple and quick, and measuring results are precise.

Description

technical field [0001] The invention relates to the field of magnetic suspension bearings. The invented static test device for axial magnetic suspension bearings has a simple structure, is convenient to adjust, has a wide range of applications, and can carry out basic principles of magnetic suspension bearings, static characteristics of magnetic suspension bearings and product quality in the production process of magnetic suspension bearings. test. Background technique [0002] Magnetic suspension bearings use magnetic field force to suspend the rotor. There is no mechanical contact between the rotor and the stator. It has the advantages of no friction, high allowable speed, no lubrication system, low noise, and small vibration. It is a new type of electromechanical bearing with broad development prospects. All-in-one product. In the design or production process of axial magnetic bearing, it is necessary to check the relationship between the magnetic field force and the app...

AI Technical Summary

Problems solved by technology

In the design or production process of axial magnetic bearing, it is necessary to check the relationship between the magnetic field force and the applied current to check whether the axial magnetic bearing meets the requirements. The current method is to complete the assembly of the entire axial magnetic bearing system, and then pass the test The characteristics of the overall system are used to verify whether the axial magnetic bearing meets the requirements. At this time, due to the coupling of axial magnetic bearings, power amplifiers, sensors, control systems and other factors, if there is a fault in a certain link, the test cannot continue. The failure of the axial magnetic bearing, because the axial magnetic bearing generally has an interference fit with the shell, the disassembly and assembly are very complicated, so a static test device is urgently needed in the development and production process of the axial magnetic bearing

The practical patent No. 201120324333.1 has a complex structure and many instruments, and the magnetic bearing needs to be installed and debugged before testing; the practical patent No. 200920282782.7 also requires a complete magnetic suspension bearing system to be debugged before testing; the patent application No. is 201410151754 The patented invention can only complete a simple test of the stiffness of the radial magnetic suspension bearing, but it has no displacement detection element, and only relies on the mechanical structure to determine the displacement, resulting in a decrease in test accuracy. In addition, due to the lack of displacement detection elements, it is impossible to accurately adjust the center of the stator and rotor. In addition, due to the limitation of the structure of the rotor limit structure itself, this test device cannot perform the static performance test of the axial magnetic bearing at all, so there is no test device for the static characteristic test of the axial magnetic bearing with high precision and simple structure.

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