本文關(guān)鍵詞： 水壓技術(shù) 水壓變量泵 水冷式油箱 共振　出處：《西南交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：現(xiàn)代水壓技術(shù)是采用自來水、海水等取代液壓油從而形成的新的驅(qū)動技術(shù)或傳動技術(shù)�，F(xiàn)代水壓驅(qū)動技術(shù)區(qū)別于古代的水壓技術(shù)和現(xiàn)代的油壓驅(qū)動技術(shù),主要原因在于水壓技術(shù)有多方面的特殊性,如介質(zhì)、材料和結(jié)構(gòu)等。目前,機(jī)械和液壓傳動等傳統(tǒng)的動力傳動技術(shù)已經(jīng)發(fā)展的相當(dāng)成熟。但傳統(tǒng)的動力傳動大多難以避免對環(huán)境的污染和資源的浪費(fèi)等問題,因此,迫于驅(qū)動技術(shù)的革新,水壓技術(shù)重新浮現(xiàn)在人們的視野當(dāng)中。為達(dá)到環(huán)保、節(jié)能的目的,世界各國逐步開始了對水壓技術(shù)的深入研究,并投入了大量的人力物力,在國內(nèi)水壓技術(shù)起步較晚,但已經(jīng)將水壓技術(shù)作為綠色工程項(xiàng)目發(fā)展開來。本比例控制水壓變量泵采用油壓元件和水壓元件進(jìn)行混合設(shè)計,由油壓元件和水壓元件及機(jī)械機(jī)構(gòu)等構(gòu)成。既適合作為傳輸介質(zhì)水壓泵結(jié)構(gòu),也適合作為能量傳輸水壓泵結(jié)構(gòu)。結(jié)構(gòu)通過油壓元件控制水壓缸,使水壓缸往復(fù)運(yùn)動實(shí)現(xiàn)吸水、排水,實(shí)現(xiàn)水壓變量泵功能。系統(tǒng)只采用了少量結(jié)構(gòu)簡單、工藝不高的水壓元件(水壓缸、單向閥、蓄能器),驅(qū)動和控制設(shè)計則采用油壓元件。由于油壓元件的開發(fā)技術(shù)成熟可靠,控制性能高,發(fā)展水平高,作為水壓泵的驅(qū)動和控制可以有效降低體積,提高可靠性,提高控制性能。本文首先根據(jù)要達(dá)到的輸出要求,提出了水壓泵的整體設(shè)計方案;另外,作為一種對集成度有高度要求的油壓、水壓一體化元件,實(shí)現(xiàn)體積小、重量輕、結(jié)構(gòu)緊湊是結(jié)構(gòu)設(shè)計要解決的關(guān)鍵問題之一。而油壓系統(tǒng)中油箱對該水壓泵體積影響最大,為此,結(jié)合新型水壓變量泵特點(diǎn),采用了水冷式油箱,并通過Fluent優(yōu)化設(shè)計,有效地降低了油箱的體積;而水壓缸是該水壓缸變量泵重要元件,在整個結(jié)構(gòu)中所占質(zhì)量較大。為了實(shí)現(xiàn)結(jié)構(gòu)輕量化的思想,通過ANSYS Workbench建立了水壓缸的有限元模型,并在水壓缸的極限工況下,對其進(jìn)行模態(tài)分析和靜力學(xué)分析。在保證剛度、強(qiáng)度滿足設(shè)計要求下,不僅減輕了機(jī)構(gòu)的質(zhì)量,還提高了水壓缸的固有頻率,有效的避免了共振的產(chǎn)生,為水壓泵系統(tǒng)中其他機(jī)構(gòu)的優(yōu)化提供了參考。
[Abstract]:Modern water pressure technology is a new driving technology or transmission technology formed by replacing hydraulic oil with tap water and sea water. The modern water pressure driving technology is different from the ancient water pressure technology and the modern oil pressure driving technology. The main reason lies in the particularity of water pressure technology in many aspects, such as medium, material and structure, etc. At present, The traditional power transmission technology, such as machinery and hydraulic transmission, has been developed quite maturely. However, most of the traditional power transmission is difficult to avoid the problems of environmental pollution and waste of resources, so it is forced by the innovation of driving technology. Water pressure technology has resurfaced in people's view. In order to achieve the goal of environmental protection and energy saving, various countries in the world have gradually begun to study water pressure technology in depth, and invested a lot of manpower and material resources, and started relatively late in domestic water pressure technology. However, water pressure technology has been developed as a green engineering project. It is composed of oil pressure element, water pressure element and mechanical mechanism. It is suitable for the structure of water pressure pump as transmission medium as well as the structure of water pressure pump for energy transmission. The structure controls the hydraulic cylinder through the oil pressure element to make the water pressure cylinder reciprocate and realize water absorption. Drainage, realize the function of water pressure variable pump. The system only uses a small number of water pressure elements (hydraulic cylinder, unidirectional valve, etc.) which are simple in structure and low in technology. Oil pressure components are used in the design of accumulator, drive and control. As the development technology of oil pressure components is mature and reliable, the control performance is high and the level of development is high. As the drive and control of hydraulic pump, the volume can be effectively reduced and the reliability can be improved. Firstly, according to the output requirements to be achieved, the overall design scheme of hydraulic pump is put forward, in addition, as a kind of oil pressure and hydraulic integration component with high integration level, it can achieve small volume and light weight. Compact structure is one of the key problems to be solved in the structural design. In the oil pressure system, the oil tank has the greatest influence on the volume of the pump. Therefore, combining with the characteristics of the new type of water pressure variable pump, the water-cooled tank is adopted and the optimized design is carried out by Fluent. The volume of the tank is reduced effectively, and the hydraulic cylinder is an important component of the variable pump of the hydraulic cylinder, which occupies a large mass in the whole structure. In order to realize the idea of lightweight structure, the finite element model of the hydraulic cylinder is established through ANSYS Workbench. Modal analysis and static analysis are carried out under the limit condition of hydraulic cylinder. Under the condition that stiffness and strength meet the design requirements, not only the quality of the mechanism is reduced, but also the natural frequency of the hydraulic cylinder is improved. The resonance is avoided effectively, which provides a reference for the optimization of other mechanisms in the hydraulic pump system.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH137.51

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