流体机械

2018, v.46;No.552(06) 39-41+82

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基于气穴性能的齿轮泵轻量化设计
Lightweight Design of Gear Pump Based on Better Cavitation Performance

文昌明;李玉龙;钟飞;
WEN Chang-ming;LI Yu-long;ZHONG Fei;Chengdu University;Suqian College;

摘要(Abstract):

为兼顾齿轮泵自吸能力、气穴性能和轻量化的性能要求,首先由建立的吸油腔的容积变化率,吸油腔内的介质压力等于介质本身的气穴压力,推导出齿轮泵气穴性能的评价指标;其次,以模数、齿数、齿顶高系数、变位系数、圆形吸口半径作为设计变量,以单位排量体积和最小吸油腔压力为双目标函数,进行优化设计;最后,进行了实例运算及分析。结果表明:优化后的齿顶最大圆周速度放大了37.7%,使得泵在齿形参数、转速上有更大的选取空间;圆形入口半径减小了19.3%,有利于泵总体体积的减小;单位排量体积较优化前减小了38.2%,实现了轻量化的目的等。基于气穴性能的优化设计,为后续的进一步研究,提供了理论依据。
In order to give concurrent consideration to the performance requirements for self-priming capacity,cavitation performance and lightweight of gear pump,firstly,the medium pressure of suction chamber is equal to cavitation pressure of the medium itself according to the established volume change rate of the suction chamber,and the evaluation index of cavitation performance of gear pump is derived. Secondly,the optimization design is carried out by taking modulus,tooth number,coefficient of addendum,modification coefficient and radius of circular suction port as design variables,and by taking pump volume per unit displacement and minimum pressure of suction chamber as the double object function. Finally,case calculations and analysis are provided. The results show that the optimized maximum circumferential speed of the addendum was enlarged by 37.7%,which makes the gear pumps have a bigger space for choice of tooth profile parameters and rotating speed;the radius of circular inlet was reduced by 19.9%,which is beneficial to reduction of overall pump volume;the unit displacement volume was reduced by 38.2% compared to that before optimization,so the optimization target of lightweight was achieved,etc. It is concluded that the optimization design based on cavitation performance provides a theoretical basis for subsequent further researches.

关键词(KeyWords): 齿轮泵;气穴性能;轻量化设计;气穴压力;齿顶最大圆周速度
gear pump;cavitation performance;lightweight design;cavitation pressure;maximum circumferential speed of the addendum

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基金项目(Foundation): 北京卫星制造厂资助项目(20804)

作者(Author): 文昌明;李玉龙;钟飞;
WEN Chang-ming;LI Yu-long;ZHONG Fei;Chengdu University;Suqian College;

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