Motor bearing current damage simulation device capable of realizing bidirectional electric loading

Abstract

The invention discloses a motor bearing current damage simulation device capable of bidirectional electric loading, which comprises a bearing, the bearing is mounted on a bearing support, the bearingsupport is fixed on a bottom plate, a groove is formed in the contact part of the bearing support and the outer ring of the bearing, and a radial servo electric cylinder is mounted in the groove; a connecting flange is arranged at the left end of the bearing and is connected with an axial servo electric cylinder; an inner ring of the bearing is fixedly connected with one end of the experiment mainshaft, the other end of the experiment main shaft is in transmission connection with the motor through a belt, an insulating layer is plated outside the experiment main shaft, and a collecting ring is arranged on the experiment main shaft and connected with a programmable power supply which is connected with an electric brush fixed on an outer ring of the bearing. And a current sensor is arrangedon the bearing support and is connected with an collection device through an collection card. The servo electric cylinder is adopted, the radial force and the axial force borne by the bearing in theoperation process can be accurately simulated, the load can be quickly changed, and the actual stress condition of the bearing can be truly simulated.

Description

technical field [0001] The invention relates to the field of bearings, in particular to a motor bearing current damage simulation device capable of bidirectional electric loading. Background technique [0002] As the manufacture of high-power motors becomes larger and larger, the converters and electrical control systems become more and more complex, and the problem of internal bearing currents increases significantly. At present, bearing shaft current damage has become the main source of generator bearing damage. The bearing becomes the most vulnerable part inside the wind turbine. The working environment of the bearing is harsh and the load-bearing conditions are complex. As a key basic component in the manufacture of various equipment, the quality of the bearing directly determines the performance, reliability and reliability of the equipment. life. [0003] In the test of simulating the electric corrosion damage of the bearing, it is necessary to simulate the actual wor...

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Problems solved by technology

[0003] In the test of simulating the electric corrosion damage of the bearing, it is necessary to simulate the actual working condition of the bearing, and simulate the load on the bearing by applying axial force and radial force when the bearing is working. In the prior art, most of the springs are used to apply the loading force And the hydraulic method, but the spring force cannot realize the automatic adjustment of the loading force and the adjustment range of the loading force is very limited. Although the loading force method is easy to operate, its control accuracy is not precise enough, and it cannot respond quickly when a small force is applied. , high control precision and other advantages

[0004] Most of the existing devices for simulating bearing shaft currents focus on how to eliminate bearing faults, but there is still relatively little research on the origin of the shaft current and how to accurately measure the shaft current generated during the operation of the motor, especially for the motor under load. The research on the damage caused by the shaft current to the motor is even more negligible

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