一种滚柱式叶片泵降噪技术研究

发布时间：2018-02-13 05:30

本文关键词： 滚柱式叶片泵定子曲线转子槽型流量脉动侧板材料降噪　出处：《兰州理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：通常,汽车是一个高速运动的复杂组合式噪声源,汽车发动机及其传动系统工作时产生的震动、高速行驶中汽车轮胎在地面上的滚动、车身与空气的作用,都是产生汽车噪音的根本原因。根据汽车噪音对环境的影响,可将汽车噪音分为车外噪音和车内噪音,车内噪音是指通过汽车各机构部分噪音辐射到车外空间的那部分噪音。主要包括发动机噪音、排气噪音、轮胎噪音、制动噪音和传动系统噪音等。汽车发动机及其传动系统是公认典型的噪声来源,在国内、国外对发动机的性能都有了深入的研究,许多科研成果也得到实际应用。在这种情况下,作为发动机系统的供油源头,电动燃油泵的噪声问题在汽车中变得越来越突出。本文针对某发动机系统的RX361型电动燃油泵入手,以这种燃油泵上的滚柱式叶片泵为研究对象,做到从供油源头入手控制噪声。本文讨论了RX361型电动燃油泵中的关键元件——滚柱式叶片泵噪声控制问题。针对电动燃油泵,文章首先介绍了国内外对电动燃油泵的研究理论现状,以及国内外专家在降噪技术领域所取得的成果。其次,通过理论分析推导得出滚柱式叶片泵产生噪声的原因,其噪声来源归结为机械噪声和流体噪声。其一,机械噪声主要是指滚柱和定了间的撞击噪声；其二,流体噪声主要是指输出流量脉动产生的油液脉冲噪声。影响滚柱式叶片泵噪声大小的原因不同,所研究的对象就不同,本文针对以下几点逐一分析：高性能的定子曲线、转子槽的形状、受泄露影响的实际输出流量脉动、以及薄弱零件(侧板)的材料优选问题。取RX361型滚柱式电动燃油泵,借鉴国内外专家针对叶片泵的研究方法,针对其上的滚柱式叶片泵,从其定子型线入手,配合改善转子槽的形状,准确推导出油泵的实际输出流量脉动,通过仿真优选其上薄弱零件(侧板)的材料。因此,有以下改进方案： 1)优化定子曲线,从流量均匀性(控制速度突变)、力学特性(控制加速度突变)和助振作用(控制加速度变化率突变)三方面考虑,得到高次定子曲线； 2)优化转子槽型,计算推导出槽型夹角,改善滚柱受力状况； 3)推导定子、滚柱及侧板之间的间隙和泄露关系,在考虑泄露流量的基础上,得到准确的实际流量脉动关系式； 4)仿真分析出滚柱式叶片泵各零件在工作过程中的应力应变,优化选择薄弱零件(侧板)材料,通过控制零件材料刚度来消除振动。通过上述一系列的改进设计,得到了光滑无冲击的定子曲线；计算出滚柱滑动摩擦力最小所对应的转子槽型夹角；推导出间隙流动的流动模型公式,有效分析了实际流量脉动及控制方法；仿真分析出各零件应力应变,针对应力最集中、应变最大的侧板,通过材料优选的方法增大其强度,进而增大了油泵整体强度。运用有限元仿真软件来模拟滚柱式叶片泵改型前后效果,其噪声性能得到较好改善,获得了理想的结果。
[Abstract]:in general , that automobile is a complex combined noise source with high - speed movement , the vibration generated during the operation of the automobile engine and the transmission system thereof , the rolling of the automobile tire on the ground , the action of the vehicle body and the air in the high - speed driving are the root cause of the automobile noise . The automobile engine and its transmission system are the typical sources of noise . In the domestic and abroad , the engine performance has been deeply studied , and many research achievements have been applied . In this case , the noise problem of the electric fuel pump becomes more and more prominent in the automobile . In this case , this paper starts with the RX361 type electric fuel pump of an engine system . In this paper , the roller type vane pump on the fuel pump is used as the research object to control the noise from the source of oil supply . This paper discusses the problem of noise control of the key element _ roller vane pump in RX361 type electric fuel pump . According to the electric fuel pump , the paper first introduces the current situation of the research theory of electric fuel pump at home and abroad , and the results obtained by experts at home and abroad in the field of noise reduction . The reason for influencing the noise size of the roller vane pump is different , and the object is different . In this paper , the following points are analyzed one by one : the high performance stator curve , the shape of the rotor groove , the actual output flow pulsation affected by leakage , and the material preference of the weak part ( side plate ) . Taking RX361 roller type electric fuel pump as a reference to the research method of vane pump at home and abroad , according to the roller vane pump at home and abroad , according to the roller type vane pump on it , the actual output flow pulsation of the oil pump is deduced , and the material of the weak part ( side plate ) is accurately derived by simulation . Therefore , the following improvement scheme is provided : 1 ) the stator curve is optimized , and the high - order stator curve is obtained from three aspects of flow uniformity ( control speed mutation ) , mechanical property ( control acceleration mutation ) and vibration - assisted action ( control acceleration change rate mutation ) ; 2 ) optimizing the groove type of the rotor , calculating the included angle of the groove type and improving the stress condition of the roller ; 3 ) deriving the clearance and leakage relation between the stator , the roller and the side plate , and obtaining the accurate actual flow pulsation relation on the basis of considering the leakage flow ; 4 ) The stress strain of each part of the roller vane pump is simulated and analyzed , and the weak part ( side plate ) material is selected , and the rigidity of the part material is controlled to eliminate vibration . Through the series of improved designs , a smooth and non - impact stator curve is obtained ; the included angle of the rotor groove corresponding to the minimum sliding friction force of the roller is calculated ; the flow model formula of the gap flow is calculated ;

【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH31;TB535

【参考文献】