【摘要】：液壓馬達是把由液壓泵提供的液壓能轉換成機械能的轉換裝置，其在工作介質的作用下，輸出轉矩和轉速。液壓馬達的徑向受力不平衡，限制了液壓元件的發(fā)展，制約其應用領域。目前在各種領域廣泛應用的液壓馬達在實際應用中還存在不能實現(xiàn)多級定轉矩和定轉速的輸出。多作用力偶液壓馬達由一個轉子對應于兩個定子，，形成內、外多個相互獨立的液壓馬達共用一個輸出軸，可以通過切換馬達之間的連接，在不改變液壓馬達輸入流量和壓力的情況下，實現(xiàn)液壓馬達多級定轉速和定轉矩調節(jié)的輸出，并且馬達的轉子受力平衡。 本文首先介紹了國內外的液壓技術的發(fā)展局勢，并介紹了現(xiàn)在廣泛應用的液壓馬達的受力情況。其次，在形成的多個內、外相互獨立液壓馬達中，一內一外液壓泵與液壓馬達有14種連接方式就可以滿足不同的工況。從而提出并定義了多作用力偶液壓馬達的設計理念及定義，并對多作用力偶液壓馬達的工作原理、結構特點等做了詳細的介紹，利用Solidworks對液壓馬達三維實體建模。再次，推導出多作用力偶液壓馬達在4種工況下的排量、瞬時流量、瞬時轉矩和瞬時轉矩的關系式。由于液壓馬達在輸出時有波動，并且外馬達(內馬達)是由多個完全相同的馬達組合而成，組合成的液壓馬達相互疊加影響了液壓馬達整體的輸出特性，因此在分析馬達輸出特性的基礎上，得出使得馬達輸出脈動最小時的進出油口的位置。進一步分析由于多作實現(xiàn)聯(lián)合工作和差動工作，其滯后角和滾柱連桿組的個數(shù)對整體馬達的輸出特性的影響。 而后對液壓馬達的關鍵零件包括轉子、滾柱連桿組作了動力學分析，得到其受力的周期性變化，通過Simulation對轉子的受力進行仿真，確定作用數(shù)為偶數(shù)時馬達的受力較好。最后，分析側板與定子端面間隙中油液溫升情況，為改善液壓馬達的泄漏情況，提出利用浮動側板改善液壓馬達的軸向泄漏并分析浮動側板結構與受力。搭建實驗平臺，測量、記錄、分析馬達空載排量、容積效率等實驗數(shù)據(jù)，驗證多作用力偶液壓馬達的可行性。為以后優(yōu)化多作用力偶液壓馬達提供依據(jù)。
[Abstract]:Hydraulic motor is a conversion device that converts hydraulic energy provided by hydraulic pump into mechanical energy. It outputs torque and rotational speed under the action of working medium. The unbalanced radial force of hydraulic motor limits the development of hydraulic components and restricts its application field. At present, the hydraulic motor, which is widely used in various fields, can not realize the output of multi-stage constant torque and fixed speed in practical application. The multi-force couple hydraulic motor is composed of a rotor corresponding to two stators, forming an output shaft shared by a plurality of independent hydraulic motors inside and outside, which can be connected by switching the motors. Without changing the input flow and pressure of the hydraulic motor, the output of the multi-stage constant speed and torque regulation of the hydraulic motor is realized, and the rotor force of the motor is balanced. This paper first introduces the development situation of hydraulic technology at home and abroad, and introduces the force situation of hydraulic motor which is widely used now. Secondly, in the forming of many internal and external independent hydraulic motors, one internal and external hydraulic pump and hydraulic motor have 14 kinds of connection mode can meet the different working conditions. The design concept and definition of the multi-force couple hydraulic motor are put forward and defined. The working principle and structure characteristics of the multi-force couple hydraulic motor are introduced in detail. The three-dimensional solid model of the hydraulic motor is modeled by Solidworks. Thirdly, the relationship between displacement, instantaneous flow rate, instantaneous torque and instantaneous torque of multi-force couple hydraulic motor under four working conditions is derived. Since the hydraulic motor fluctuates in output, and the outer motor (inner motor) is composed of several identical motors, the combined hydraulic motor superimposed on each other affects the output characteristics of the hydraulic motor as a whole. Therefore, on the basis of analyzing the output characteristics of the motor, the position of the inlet and outlet when the output pulsation of the motor is minimized is obtained. The effects of the lag angle and the number of roller connecting rod on the output characteristics of the whole motor are analyzed. Then the key parts of the hydraulic motor including the rotor and the roller connecting rod are analyzed dynamically and the periodic variation of the force is obtained. The force of the rotor is simulated by Simulation and the force of the motor is better when the action number is even. Finally, the oil temperature rise in the clearance between the side plate and the stator is analyzed. In order to improve the leakage of the hydraulic motor, the floating side plate is used to improve the axial leakage of the hydraulic motor and the structure and force of the floating side plate are analyzed. The experimental data of no-load displacement and volumetric efficiency were analyzed to verify the feasibility of multi-force couple hydraulic motor. It provides the basis for optimizing multi-force couple hydraulic motor in the future.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TH137.51

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