低压齿轮泵噪音分析与控制

发布时间：2018-03-23 22:05

本文选题：齿轮泵　切入点：噪音　出处：《苏州大学》2011年硕士论文

【摘要】：齿轮泵价格相对低且性价比高,在中低压定量系统、润滑系统等领域获得了广泛认可[1]。液压齿轮泵正向着快响应、小体积、低噪音、高压化、大排量的方向发展。关于齿轮泵的噪音研究很多,可大多数都是针对卸荷槽、导流槽、润滑槽等流体压力方面的考虑,而就齿轮的制造误差产生的噪音的研究不是很多。本论文主要以齿轮动态模型为基础,以各种噪音实验(声压力、压力波动、加速度)为依据,考虑各种制造误差(包括:齿形、齿向、齿间距、节圆径跳以及花键节圆径跳),材料的不同等实际因素,通过针对啮合时变刚度计算。得出由于误差产生的提早进入齿轮啮合区的冲击振动。最后将振动转化为加速度,这样对噪音的问题归结为对振动的分析,以解决目前遇到的问题。同时,给出相应的齿轮制造精度要求,以及花键连接径跳要求。研究结果表明:(1)齿轮的精度对噪音振动时有影响的,但实际不大;(2)更多的噪音振动不是来自于齿轮精度本身,而是诸如连接误差、工艺缺陷、国内工艺能力不足引起的。本文遇到的问题就是因为内花键径跳超差产生;(3)通过计算,在现有能力的情况下,通过对有限度的提高工艺能力,同时在其他方面提高要求,来降低噪音水平。如花键径跳从0.2mm提高到0.12mm;适时的提高齿面精度,以减小摩擦振动。通过努力,最后和进口齿轮的噪音只有1到2分贝的差距;
[Abstract]:Gear pump has been widely accepted in the fields of medium and low pressure quantitative system, lubrication system and so on because of its low price and low cost. Hydraulic gear pump is facing fast response, small volume, low noise, high pressure, etc. There are many researches on the noise of gear pump, but most of them are based on the fluid pressure, such as unloading slot, flow guide groove and lubricating groove, but the noise caused by the manufacturing error of gear is not much studied. In this paper, based on the dynamic model of gear, based on various noise experiments (acoustic pressure, pressure fluctuation, acceleration), various manufacturing errors (including tooth profile, tooth direction, tooth spacing) are considered. In view of the different practical factors of the material, the nodal circular diameters and spline nodal diameters are calculated according to the time-varying stiffness of the meshing. The shock vibration which enters the gear meshing area early due to the error is obtained. Finally, the vibration is transformed into acceleration. In this way, the noise problem is reduced to the analysis of vibration to solve the problems encountered at present. At the same time, the requirements of gear manufacturing accuracy and spline connection diameter-slip are given. The results show that the accuracy of gear has an effect on the noise vibration, but in practice, more noise vibration does not come from the gear precision itself, but rather from the connection error and technological defects. The problem encountered in this paper is that the internal splines' diameter-skip overshoot is produced by calculating, in the case of the existing capacity, by raising the technological capacity to a limited extent, and at the same time raising the requirements in other aspects. To reduce the noise level, such as the spline diameter jump from 0.2mm to 0.12mm; to improve the tooth surface accuracy in time to reduce friction vibration. Through efforts, the final noise and imported gear noise only 1 to 2 decibels gap;
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TB535;TH325

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