A method for dynamic balance adjustment of rotor model test bench
A model test and test bench technology, applied in static/dynamic balance test, aerodynamic test, machine/structural component test, etc., can solve problems such as inability to adjust dynamic balance and test bench dynamic balance, and achieve The effect of reducing test risk and improving test efficiency
Active Publication Date: 2019-05-07
CHINA HELICOPTER RES & DEV INST
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Problems solved by technology
[0005] The existing technology is unable to adjust the dynamic balance of the test bench under the state of the wind tunnel test, that is, the dynamic balance adjustment cannot be performed during the test
Method used
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[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...
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The invention discloses a rotor model test stand dynamic balance adjusting method. The rotor model test stand dynamic balance adjusting method comprises steps that step 1, a blade-less rotor test is carried out to acquire effective rotor test data; step 2, counterweights are added at a support arm of any rotor for multiple times; step 3, counterweights are added at a support arm of another rotor besides the support arm of the any rotor added with the counterweights in the step 2, and a rotor test is carried out to acquire rotor test data of the present rotor test; step 4, whether phase difference of the support arm of the rotor in the step 2 and the support arm of the rotor in the step 3 and an absolute value of difference of average data values of the step 2 and the rotor test data of the step 3 are in a threshold scope is determined; and step 6, a rotor balance fundamental frequency restriction value AmxL of the step 5 is taken as a largest threshold to carry out a blade rotor test; whether fundamental frequency of a rotor balance surpasses the rotor balance fundamental frequency restriction value in the blade rotor test process is monitored.
Description
technical field [0001] The invention relates to the technical field of helicopter model rotor tests, in particular to a method for adjusting the dynamic balance of a rotor model test stand. Background technique [0002] The dynamic balance adjustment of the model test rig is a necessary work before the model rotor test. Only when the dynamic balance of the test rig is adjusted to the ideal state can the follow-up subjects be tested. [0003] The existing technology uses vibration to adjust the dynamic balance of the model test bench, but during the wind tunnel test of the model rotor, especially after the fuselage and propeller fairing are installed, it is impossible to directly install the acceleration sensor on the propeller shaft. [0004] The fundamental frequency of the rotor balance test data and the vibration of the test bench has a close linear correlation, so the fundamental frequency load data of the rotor balance can be used to adjust the dynamic balance of the te...
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IPC IPC(8): G01M9/02G01M1/38
CPCG01M1/00G01M9/02
Inventor 刘正江陈焕黄建萍邓建军
Owner CHINA HELICOPTER RES & DEV INST