Quantitative test method for endogenous excitation load of equipment under joint action of unbalanced turbulence force and unbalanced turbulence moment

Abstract

The purpose of the invention aims to provide a quantitative test method for endogenous excitation load of equipment under a joint action of unbalanced turbulence force and unbalanced turbulence moment. The method comprises the following steps: selecting a group of two same vibration isolators to be respectively arranged on machine legs of tested equipment, fixing the vibration isolators onto a rigid rack, and installing four acceleration transducers in the vibration isolator positions of the machine legs of the tested equipment; starting the tested equipment, and respectively obtaining signals of two groups of acceleration transducers to obtain the average velocity value of two groups; replacing the two vibration isolators, starting the tested equipment, respectively obtaining the signals of the two groups of acceleration transducers to obtain the average velocity value of the two groups, and therefore obtaining the unbalanced turbulence force of the tested equipment, the unbalanced turbulence moment of the equipment, the equivalent mass of the equipment and the equivalent inertia moment of the equipment. The quantitative test method has the characteristics of good stability and controllability, low cost, less auxiliary equipment, simplicity and convenience.

Description

technical field [0001] The present invention relates to a measurement method, in particular to a measurement method of internal source characteristics of rotating equipment. Background technique [0002] Due to the complexity of the actual working conditions, it is usually difficult to obtain the excitation force of the equipment on the installation foundation through direct measurement, while the bench test results of the equipment leaving the factory are easy to obtain. The incentive force of the installed base can effectively solve the difficulties brought about by the actual test. [0003] To carry out the bench test of the equipment leaving the factory, the method often used is: the equipment is fixed on the bench under the simulated actual working conditions, and after the equipment is running normally, the acceleration value on the test bench is measured to simulate the actual working environment of the equipment. Under the acceleration response. The analysis of the...

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Problems solved by technology

Among them: Document 1 proposes to measure the source characteristics of the equipment, and conduct experimental analysis on the condition of elastic installation to measure the free velocity, but the method of determining the equivalent mass and equivalent exciting force of equipment vibration is not determined in this paper; Document 2 mainly considers The impact of external loads on the equipment base does not consider whether the base has an impact on the internal source characteristics of the equipment; Document 3 mainly analyzes the admittance of the installation foundation of the equipment, and does not propose the estimation of the internal source characteristics of the equipment method; Document 4 proposes to use "free velocity" to describe source strength; Document 5 introduces source descriptors to characterize source characteristics

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