Device and method for testing rotary inertia of electro-hydraulic servo valve gag bit assembly
An electro-hydraulic servo valve and moment of inertia technology, applied in the field of servo valve testing, can solve the problems of improvement, inaccurate results, adverse product performance, etc., and achieve the effect of convenient operation, simple and reasonable structure
Inactive Publication Date: 2011-08-17
WUXI HUATONG HYDRAULIC PNEUMATIC MFG
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Problems solved by technology
However, the armature assembly is generally composed of parts such as the armature, spring tube, baffle and feedback rod through press fitting and welding. Due to the different shapes of the parts, the results measured by traditional calculation methods are not very accurate, which is not conducive to product performance. improvement of
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[0018] When the above test device is specifically applied to the measurement operation, the steps are as follows:
[0019] (1) First apply a knocking force F to the end of the armature 4 that is not connected to the sensing terminal 5;
[0020] (2) The armature assembly produces damped oscillation after knocking, and the waveform generated by the damped oscillation of the armature assembly is recorded with the sensor 6 and the oscilloscope 7. The waveform diagram is as follows figure 2 shown;
[0021] (3) Select 8 waves from the waveform diagram recorded by the above-mentioned oscilloscope 7, and the total time to produce these 8 waves is T, and the total time T is divided by the wave number 8 to obtain the period T of the vibration waveform N =T / 8; according to the formula ω a =1 / T N , calculate the frequency ω of the damped oscillation of the armature assembly a =8 / T;
[0022] (4) According to the formula and the damped oscillation frequency of the armature assembly ...
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The invention relates to device and method for testing rotary inertia of an electro-hydraulic servo valve gag bit assembly. The test device comprises a supporting frame, wherein the gag bit assembly is placed on the supporting frame and comprises a gag bit, a spring tube, a baffle plate and a feedback rod. The test device is characterized by also comprising a sensor and an oscillograph, wherein the sensor is connected with one end of the gag bit in the gag bit assembly through a sensing end head and is used for sensing damped oscillation of the gag bit assembly, and the oscillograph is connected with the sensor through a connecting wire and is used for displaying and recording the wave form of the damped oscillation of the gag bit assembly. In the test method, the rotary inertia of the gag bit assembly is computed by measuring and computing a wave form displayed and recorded by the oscillograph and then combining the traditional grown theory. The test device has simple and reasonable structure and convenient operation, can accurately and rapidly measure the rotary inertia of the gag bit assembly, and the accuracy completely accords with the requirement.
Description
technical field [0001] The invention belongs to the technical field of servo valve testing, and in particular relates to a testing device and a testing method for the moment of inertia of an armature assembly of an electro-hydraulic servo valve. Background technique [0002] The electro-hydraulic servo valve is an electro-hydraulic servo control element with high precision and dynamic response used in electro-hydraulic control systems, and is widely used in electro-hydraulic servo control systems for precise displacement, speed, force and acceleration. Its application occasions are very extensive. However, the research and manufacture of electro-hydraulic servo valves in China is still in a relatively backward state, and the technical level of the combination and assembly of parts is also far behind that of foreign countries. As an important part of the electro-hydraulic servo valve torque motor, the armature assembly has a great influence on the performance of the entire e...
Claims
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IPC IPC(8): G01M1/10
Inventor 田源道
Owner WUXI HUATONG HYDRAULIC PNEUMATIC MFG