Four-axis electromagnetic torsional vibration integration test platform

Abstract

A four-axis electromagnetic torsional vibration integration test platform provided by the invention comprises a pedestal, fixed plates, an electromagnet driving set and a tool. Each electromagnet driving set comprises an annular excitation shaft, a core rod and a central magnetic pole, the annular excitation shaft is a hollow shaft, the outer portion of the annular excitation shaft is winded with an annular excitation coil, the core rod passes through the central hole of the annular excitation shaft, the center of the core rod is in a hollow shape, the central magnetic pole is fixed at the center of the core rod, the outer end of the core rod passes through the outer portion of the annular excitation shaft, the inner end of the core rod passes through the annular excitation shaft and is extended to the middle portion between a left fixed plate and a right fixed plate, the tool is arranged in the inner end portion of the core rod, and the outer end of the core rod is provided with a displacement sensor. The test platform further comprises a PLC controller, and the displacement sensor and the annular excitation coil are connected with the PLC controller. The four-axis electromagnetic torsional vibration integration test platform employs the electromagnetic induction principle, each installation point can output different excitations, the torsional vibration force combination suffered by the tested parts in the actual state is accorded, the test distortion rate is low, and the test functions are diversified.

Description

technical field [0001] The invention relates to the technical field of torsional vibration detection equipment, in particular to a four-axis electromagnetic torsional vibration comprehensive test platform with diversified test functions and more realistic test states. Background technique [0002] At present, the test bench used to test the vibration of parts and components is fixed in the following way: the tooling is installed on the test bench, there are four installation points on the tooling and the tested product, and the tested product is fixed through four installation points on the test bench. The excitation process is: vibrating table—transfer tooling—the product under test (excitation: refers to the vibration frequency, acceleration, etc. output by the vibration test bench to the product under test; the product under test: narrowly refers to the vehicle radiator, Condensers, the generalization can be extended to all multi-point mounted block components). It can ...

AI Technical Summary

Problems solved by technology

The traditional vibration test bench cannot simulate the excitation method in which all installation points are independent. Therefore, the test process of the traditional vibration test bench cannot completely simulate the state of the real vehicle, which leads to the challenge of the objectivity of the vibration test.

And under the operation of the real vehicle, each installation point of the tested product is subject to independent vibration and torsion, as well as a combination of the two excitations. The current vibration test bench can only simulate one vibration excitation mode arbitrarily and one-sidedly. Can't simulate

[0004] However, the existing torsional vibration test benches still have some other deficiencies: the torsional vibration test benches are all made by each manufacturer for the 5.11 torsional vibration performance test in QC / T468 (recommended standard for the automotive industry). Uniform Equipment Standards

[0007] 1. Small torque: the power of the drive motor is small, and the torsional vibration test bench cannot twist when encountering products with too large deflection angle or high quality

[0008] 2. The frequency is too low: the torsional vibration rate is at most 1Hz, which is far below the 6Hz required by the standard

[0009] 3. Poor repeatability: unable to measure and calibrate, resulting in poor reliability of the test

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