Vibration test fixture for frequency converter

Abstract

The invention provides a vibration test clamp for a frequency converter. The clamp includes a bottom supporting assembly supported on the bottom surface of a frequency converter, and a side surface positioning assembly limited on one side surface of the frequency converter. The bottom supporting assembly is perpendicular to the side surface positioning assembly. The bottom supporting assembly includes a bottom crossbeam, a bottom vertical beam and a bottom inclined draw beam, wherein the bottom crossbeam and the bottom vertical beam cross each other, and the periphery of the bottom crossbeam and the periphery of the bottom vertical beam are connected through the bottom inclined draw beam. The advantages of the vibration test clamp are that the mass is small, the rigid is high, and test errors are minor.

Description

technical field [0001] The invention relates to a test fixture, in particular to a vibration test fixture for a frequency converter. Background technique [0002] With the development of science and technology, the vibration test of large-scale samples puts forward higher requirements for the test equipment, and the test fixture in the test equipment fixes the test article on the vibration platform and transmits the vibration energy to the test article. Therefore, the test fixture is in Plays a key role in the whole vibration test. [0003] The existing frequency converter vibration test fixture design usually lacks necessary calculation analysis and inspection and testing, the vibration transmitted by the fixture is often distorted, and the vibration magnitude of each point on the fixture varies greatly, and there are multi-order resonances in the test frequency band, which affects Test Results. At the same time, the existing vibration test fixture structure cannot guaran...

AI Technical Summary

Problems solved by technology

[0003] The existing frequency converter vibration test fixture design usually lacks necessary calculation analysis and inspection and testing, the vibration transmitted by the fixture is often distorted, and the vibration magnitude of each point on the fixture varies greatly, and there are multi-order resonances in the test frequency band, which affects Test Results

At the same time, the existing vibration test fixture structure cannot guarantee the accuracy of the test results. Specifically, there are the following shortcomings:

[0004] 1) The vibrating fixture uses multiple sets of horizontal beams and vertical beams to realize the positioning of the test piece. The vibrating fixture is heavy, which occupies the effective carrying capacity of the vibrating table and affects the test results;

[0005] 2) The vibration fixture has low rigidity and low natural frequency. The natural frequency of the vibration fixture is close to the natural frequency of the product under test. It is easy to generate resonance during the vibration test, which will affect the test results;

[0006] 3) The specifications of the existing vibration fixtures are fixed. When the same product needs to be placed on different vibration tables for testing, it is necessary to use multiple test fixtures, which is costly

Images