本文選題：高速開關閥　切入點：插裝閥　出處：《昆明理工大學》2011年碩士論文

【摘要】：在液壓控制系統(tǒng)中,液壓泵是一個不可缺少的核心元件,其性能的好壞直接對液壓系統(tǒng)的性能有著重要的影響。為實現(xiàn)液壓系統(tǒng)較高的能源效率及可控性能,變量泵在較多的液壓系統(tǒng)中使用。泵變量主要有電機變頻調速和改變排量兩種方式,但兩種方式都存在著較大的慣性,動態(tài)響應慢等問題,嚴重阻礙液壓系統(tǒng)整體性能的提升。 本文針對兩種變量方式的不足,設計了一種由定量泵、高速開關閥、插裝閥、蓄能器等元件組成的在閉環(huán)控制狀態(tài)下實現(xiàn)變量功能的數(shù)字式變量泵。該泵利用高速開關閥控插裝閥代替普通變量泵的變量機構,消除變量機構的慣性影響,改善液壓系統(tǒng)的動態(tài)響應,通過控制PWM信號,實現(xiàn)較大的流量或壓力控制范圍,從而提高液壓系統(tǒng)效率及控制性能。 論文分析了高速開關閥及插裝閥的相關特性,闡述了數(shù)字式變量泵先導控制級——高速開關閥控插裝閥的控制策略,通過工作原理分析、數(shù)學方程建立及AMEsim軟件仿真,選擇控制性能優(yōu)越的二位三通高速開關閥控插裝閥作為數(shù)字式變量泵的先導控制級。其后,確定了數(shù)字式變量泵的整體控制方案,通過工作原理分析和建模仿真,研究了控制方案的可行性及其不同參數(shù)對數(shù)字式變量泵性能的影響。最后通過閉環(huán)優(yōu)化控制,使數(shù)字式變量泵具有較小的壓力波動范圍和較短的響應時間,來實現(xiàn)數(shù)字式變量泵的最佳控制性能。
[Abstract]:In the hydraulic control system, hydraulic pump is an indispensable core component, its performance has a direct impact on the performance of the hydraulic system. In order to achieve higher energy efficiency and controllability of hydraulic system, Variable pump is used in many hydraulic systems. There are two main pump variables: motor variable frequency speed regulation and variable displacement, but there are many problems such as large inertia, slow dynamic response and so on, which seriously hinder the improvement of the whole performance of hydraulic system. Aiming at the deficiency of two kinds of variable mode, this paper designs a kind of quantitative pump, high speed switch valve and cartridge valve. The digital variable pump, composed of accumulator and other components, realizes variable function under closed loop control. The pump uses high speed switch valve to control cartridge valve instead of variable mechanism of ordinary variable pump to eliminate inertia influence of variable mechanism. The dynamic response of hydraulic system is improved. By controlling PWM signal, a large flow or pressure control range is realized, thus improving the efficiency and control performance of hydraulic system. This paper analyzes the characteristics of high speed switch valve and cartridge valve, and expounds the control strategy of digital variable variable pump pilot control stage-high speed switch valve control cartridge valve. Through the analysis of working principle, the establishment of mathematical equation and the simulation of AMEsim software. The two-position three-way high-speed switch valve controlled cartridge valve with superior control performance is selected as the pilot control stage of the digital variable variable pump. Then, the overall control scheme of the digital variable pump is determined, and the working principle analysis and modeling and simulation are carried out. The feasibility of the control scheme and the influence of different parameters on the performance of the digital variable pump are studied. Finally, through the closed-loop optimization control, the digital variable pump has a smaller pressure fluctuation range and a shorter response time. To achieve the optimal control performance of digital variable pump.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH137.51

【引證文獻】

相關期刊論文 前2條

1 王慶輝;吳張永;王嫻;吳喜;溫成卓;;磁流變數(shù)字閥研究[J];機床與液壓;2013年09期

2 郝建軍;程昶;張志剛;葛帥帥;;基于高速開關閥的液壓馬達調速系統(tǒng)研究[J];液壓與氣動;2013年07期

相關碩士學位論文 前1條

1 莫子勇;基于磁流變液的插裝式高速開關閥研究[D];昆明理工大學;2012年

，

本文編號：1689971