本文關鍵詞： 滾柱式葉片泵 定子曲線 轉子槽型 流量脈動 側板材料 降噪　出處：《蘭州理工大學》2014年碩士論文　論文類型：學位論文

【摘要】：通常,汽車是一個高速運動的復雜組合式噪聲源,汽車發(fā)動機及其傳動系統(tǒng)工作時產生的震動、高速行駛中汽車輪胎在地面上的滾動、車身與空氣的作用,都是產生汽車噪音的根本原因。根據汽車噪音對環(huán)境的影響,可將汽車噪音分為車外噪音和車內噪音,車內噪音是指通過汽車各機構部分噪音輻射到車外空間的那部分噪音。主要包括發(fā)動機噪音、排氣噪音、輪胎噪音、制動噪音和傳動系統(tǒng)噪音等。 汽車發(fā)動機及其傳動系統(tǒng)是公認典型的噪聲來源,在國內、國外對發(fā)動機的性能都有了深入的研究,許多科研成果也得到實際應用。在這種情況下,作為發(fā)動機系統(tǒng)的供油源頭,電動燃油泵的噪聲問題在汽車中變得越來越突出。本文針對某發(fā)動機系統(tǒng)的RX361型電動燃油泵入手,以這種燃油泵上的滾柱式葉片泵為研究對象,做到從供油源頭入手控制噪聲。 本文討論了RX361型電動燃油泵中的關鍵元件——滾柱式葉片泵噪聲控制問題。針對電動燃油泵,文章首先介紹了國內外對電動燃油泵的研究理論現狀,以及國內外專家在降噪技術領域所取得的成果。其次,通過理論分析推導得出滾柱式葉片泵產生噪聲的原因,其噪聲來源歸結為機械噪聲和流體噪聲。其一,機械噪聲主要是指滾柱和定了間的撞擊噪聲；其二,流體噪聲主要是指輸出流量脈動產生的油液脈沖噪聲。 影響滾柱式葉片泵噪聲大小的原因不同,所研究的對象就不同,本文針對以下幾點逐一分析：高性能的定子曲線、轉子槽的形狀、受泄露影響的實際輸出流量脈動、以及薄弱零件(側板)的材料優(yōu)選問題。 取RX361型滾柱式電動燃油泵,借鑒國內外專家針對葉片泵的研究方法,針對其上的滾柱式葉片泵,從其定子型線入手,配合改善轉子槽的形狀,準確推導出油泵的實際輸出流量脈動,通過仿真優(yōu)選其上薄弱零件(側板)的材料。因此,有以下改進方案： 1)優(yōu)化定子曲線,從流量均勻性(控制速度突變)、力學特性(控制加速度突變)和助振作用(控制加速度變化率突變)三方面考慮,得到高次定子曲線； 2)優(yōu)化轉子槽型,計算推導出槽型夾角,改善滾柱受力狀況； 3)推導定子、滾柱及側板之間的間隙和泄露關系,在考慮泄露流量的基礎上,得到準確的實際流量脈動關系式； 4)仿真分析出滾柱式葉片泵各零件在工作過程中的應力應變,優(yōu)化選擇薄弱零件(側板)材料,通過控制零件材料剛度來消除振動。 通過上述一系列的改進設計,得到了光滑無沖擊的定子曲線；計算出滾柱滑動摩擦力最小所對應的轉子槽型夾角；推導出間隙流動的流動模型公式,有效分析了實際流量脈動及控制方法；仿真分析出各零件應力應變,針對應力最集中、應變最大的側板,通過材料優(yōu)選的方法增大其強度,進而增大了油泵整體強度。運用有限元仿真軟件來模擬滾柱式葉片泵改型前后效果,其噪聲性能得到較好改善,獲得了理想的結果。
[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 ;

【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TH31;TB535

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本文編號：1507425