本文選題：平衡式雙定子泵 + 密封容積��； 參考：《燕山大學》2015年碩士論文

【摘要】：液壓泵是將機械能轉(zhuǎn)換為液壓能的裝置,是液壓系統(tǒng)的心臟。目前廣泛應用的葉片泵均由一個轉(zhuǎn)子對應一個定子組成一個泵,雙聯(lián)泵亦是如此,這限制了葉片泵功率質(zhì)量比進一步提升的空間。雙定子結(jié)構(gòu)通過將獨立的葉片泵徑向布置,使兩泵共用一個轉(zhuǎn)子與一根泵軸,打破了轉(zhuǎn)子與定子的一一對應關(guān)系,使大幅提高葉片泵的功率質(zhì)量比成為可能。然而,由于同時受內(nèi)、外泵中高壓油液的雙重影響,作用于轉(zhuǎn)子上的軸向與徑向不平衡液壓力對雙定子泵的影響十分嚴重。由此,本課題研究了平衡式雙定子泵方案。首先,提出了本課題研究的背景與意義,指出了雙定子泵與雙聯(lián)泵的區(qū)別,介紹了目前國內(nèi)外容積式液壓泵特別是容積式葉片泵的創(chuàng)新與發(fā)展趨勢和本課題的主要研究內(nèi)容及面臨的難點。其次,闡述了平衡式雙定子泵的工作過程與連接方式,針對雙定子泵特有的密封容積形成過程,對葉片結(jié)構(gòu)進行了受力分析。研究了不同工況下平衡式雙定子泵賴以工作的密封容積的形成機理。對平衡式雙定子泵進行了結(jié)構(gòu)設計,通過分別將雙定子泵內(nèi)、外泵中的吸壓油窗口對稱設計并連接在一起的方法,使轉(zhuǎn)子徑向受力處于動態(tài)平衡之中;采用液壓壓力平衡的方法,將轉(zhuǎn)子軸向受力減至最小。推出了轉(zhuǎn)子徑向受力的表達式,同時校核了葉片結(jié)構(gòu)。再次,對平衡式雙定子泵的輸出特性進行了研究,推出了該泵在三種不同工況下的排量、瞬時流量公式,探討了多作用雙定子泵中由于流量疊加而對泵輸出特性的影響。在對該泵輸出特性分析的基礎上,得出了泵輸出脈動最小時的進出油口位置�？紤]了滯后角對平衡式雙定子泵整體輸出特性的影響。同時,還分析了該泵的內(nèi)泄途徑及不同內(nèi)泄途徑的泄漏量,得到了不同工況下該泵的泄漏量表達式。最后,搭建了平衡式雙定子泵實驗平臺,進行了原理性實驗,驗證了平衡式雙定子泵的可行性。為以后平衡式雙定子泵的優(yōu)化奠定了基礎。
[Abstract]:Hydraulic pump is a device that converts mechanical energy to hydraulic energy and is the heart of hydraulic system. At present, vane pumps are widely used to form a pump with a rotor corresponding to a stator, as is the case with a dual pump, which limits the room for further improvement of the power and mass ratio of the vane pump. Through the radial arrangement of the independent vane pump, the dual stator structure makes the two pumps share a rotor and a pump shaft, which breaks the one-to-one relationship between the rotor and the stator, and makes it possible to greatly improve the power mass ratio of the vane pump. However, due to the double influence of high pressure oil in the internal and external pumps, the axial and radial unbalanced hydraulic forces acting on the rotor have a very serious effect on the double-stator pump. Therefore, the balanced double stator pump scheme is studied in this paper. First of all, the background and significance of this research are put forward, and the difference between double stator pump and dual pump is pointed out. This paper introduces the innovation and development trend of the displacement hydraulic pump at home and abroad, especially the displacement vane pump, and the main research contents and difficulties in this subject. Secondly, the working process and connection mode of the balanced double stator pump are expounded, and the blade structure is analyzed according to the forming process of the sealing volume of the double stator pump. The forming mechanism of sealing volume of balanced double stator pump under different working conditions is studied. The structural design of the balanced double-stator pump is carried out. Through the symmetrical design and connection of the suction window in the double-stator pump and the external pump, the radial force of the rotor is in dynamic balance. The axial force of the rotor is minimized by hydraulic pressure balance. The expression of radial force on rotor is derived, and the blade structure is checked at the same time. Thirdly, the output characteristics of the balanced double-stator pump are studied, the displacement and instantaneous flow formulas of the pump under three different working conditions are deduced, and the effect of the multi-action double-stator pump on the pump output characteristics due to the superposition of the flow rate is discussed. Based on the analysis of the pump output characteristics, the position of the inlet and outlet when the pump output pulsation is minimum is obtained. The effect of lag angle on the output characteristics of balanced double stator pump is considered. At the same time, the leakage amount of the pump and the leakage of different internal discharge ways are analyzed, and the expression of the leakage rate of the pump under different working conditions is obtained. Finally, the experimental platform of balanced double stator pump is built, and the principle experiment is carried out to verify the feasibility of the balanced double stator pump. It lays a foundation for the optimization of the balanced double stator pump 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】：2015
【分類號】：TH137.51

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本文編號：1929173