The Structure Improvement and Performance Test of the Prototype of Electric Motor Pump
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摘要: 为了进一步降低液压电机叶片泵样机的噪声、提高效率,运用有限元分析软件对研制出的液压电机叶片泵样机的部分部件进行应力应变与流场计算和结构改进,获得了改进样机的转子转速、输出流量、噪声声压级和效率随输出压力的变化规律。结果表明:改进后液压电机叶片泵样机有效地解决了内泄漏较大问题,消除了因内部流道狭窄引起的气穴现象;与电机油泵组相比,容积效率基本一致,在输出压力大于13 MPa时,总效率略低,约为2%,噪声声压级降低了11 dB以上。Abstract: The present objectives are to further reduce the noise of the prototype of electric motor-vane pump andincrease the efficiency. The finite element method (FEM) calculating the stress-strain of some parts and flow fieldand some structure improvement measures of the first prototype were put forward in this paper. The performancetests of the improved prototype have been performed to attain the variety regulations of rotor speed, noise, powerand efficiency with the outlet pressure. The experimental results of the improved prototype were compared withthose of the motor-pump combination with the same power. The results show that the problem of larger internal leakage was solved effectively and the cavitation caused by the narrow internal channels was eliminated in the improvedprototype. The volumetric efficiency is compared to the motor-pump combinations. At the output pressure above13 MPa, the efficiency decreases by about 2% and the noise level decreases by above 11 dB.
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Key words:
- electric motor pump /
- FEM /
- structure improvement /
- performance test
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