本文選題：流量自動(dòng)限制裝置　切入點(diǎn)：結(jié)構(gòu)設(shè)計(jì)　出處：《華中科技大學(xué)》2011年碩士論文

【摘要】：流量自動(dòng)限制裝置用于某重大裝備的液壓系統(tǒng)中,對(duì)液壓系統(tǒng)起安全保護(hù)作用。本文針對(duì)該重大裝備中液壓系統(tǒng)需求,參考現(xiàn)有限速切斷閥結(jié)構(gòu)及原理,研制出流量自動(dòng)限制裝置,設(shè)計(jì)了試驗(yàn)系統(tǒng)并進(jìn)行仿真和試驗(yàn),對(duì)裝置抗沖擊特性等進(jìn)行了研究。 1)流量自動(dòng)限制裝置工作原理分析及結(jié)構(gòu)設(shè)計(jì)。該裝置為超流量自動(dòng)切換裝置,靠流量信號(hào)轉(zhuǎn)化為壓差信號(hào)后推動(dòng)主閥芯動(dòng)作以切斷流道。流量自動(dòng)限制裝置除需具有自動(dòng)切斷作用外,同時(shí)還需具備手動(dòng)和遠(yuǎn)程操縱功能,本文對(duì)該裝置進(jìn)行了新的原理設(shè)計(jì)。結(jié)構(gòu)設(shè)計(jì)包括強(qiáng)度校核及材料選擇等,重點(diǎn)介紹了主要結(jié)構(gòu)件及閥芯彈簧的設(shè)計(jì)。 2)流量自動(dòng)限制裝置試驗(yàn)系統(tǒng)研究。設(shè)計(jì)了流量自動(dòng)限制裝置性能試驗(yàn)臺(tái),用來測(cè)試該裝置的性能、安全性及可靠性。首先基于AMESim軟件,在裝置自動(dòng)工作狀態(tài)下,對(duì)試驗(yàn)系統(tǒng)產(chǎn)生符合壓力要求的瞬態(tài)大流量的試驗(yàn)?zāi)芰M(jìn)行了仿真,然后搭建試驗(yàn)臺(tái),試驗(yàn)驗(yàn)證裝置自動(dòng)工作狀態(tài)下的切換性能、密封性能,及手動(dòng)、液動(dòng)狀態(tài)下的動(dòng)作特性等。對(duì)仿真及試驗(yàn)結(jié)果進(jìn)行了分析和研究,驗(yàn)證該試驗(yàn)系統(tǒng)滿足流量自動(dòng)限制裝置的各項(xiàng)性能指標(biāo)。 3)流量自動(dòng)限制裝置抗沖擊特性仿真研究。建立了詳細(xì)的流量自動(dòng)限制裝置在船用沖擊指標(biāo)下的抗沖擊特性數(shù)學(xué)模型,在數(shù)學(xué)模型基礎(chǔ)上通過使用MATLAB/Simulink模塊對(duì)流量自動(dòng)限制裝置動(dòng)態(tài)過程進(jìn)行了動(dòng)態(tài)仿真,對(duì)其仿真結(jié)果進(jìn)行分析表明,在船用指標(biāo)下,流量自動(dòng)限制裝置抗沖擊特性良好,仿真模型及結(jié)果還可為流量自動(dòng)限制裝置及同類閥件的抗沖擊特性研究奠定了一定的理論與實(shí)驗(yàn)基礎(chǔ)。
[Abstract]:The automatic flow limiting device is used in the hydraulic system of some important equipment and plays a protective role in the hydraulic system.In this paper, according to the requirement of hydraulic system in this important equipment and referring to the structure and principle of speed limiting valve, an automatic flow limiting device is developed, the test system is designed and simulated and tested, and the impact resistance characteristic of the device is studied.1) working principle analysis and structure design of flow automatic limiting device.The device is an automatic switching device for overflow. The flow signal is converted into a differential pressure signal and the main valve core is driven to cut off the flow channel.In addition to the function of automatic cutting off, the automatic flow limiting device must also have the functions of manual and remote operation. In this paper, a new principle design of the device is presented.The structural design includes strength check and material selection. The design of main structural parts and spool spring is introduced emphatically.2) Research on the test system of flow automatic limiting device.An automatic flow limiting device performance test rig is designed to test the performance, safety and reliability of the device.First, based on the AMESim software, the test ability of the test system to produce the transient large flow rate according to the pressure requirement is simulated under the automatic working state of the device, and then the test bench is built to verify the switching performance of the device in the automatic working state.Sealing performance, and manual, hydraulic state of action characteristics, etc.The simulation and test results are analyzed and studied to verify that the test system meets the performance indexes of the automatic flow limiting device.3) Simulation study on impact resistance of automatic flow limiting device.A detailed mathematical model of the impact resistance of the automatic flow limiting device under the impact index is established. Based on the mathematical model, the dynamic process of the flow automatic limiting device is simulated by using the MATLAB/Simulink module.The simulation results show that the anti-impact characteristics of the automatic flow limiting device are good.The simulation model and results can also lay a theoretical and experimental foundation for the study of the impact resistance of flow automatic limiting devices and similar valves.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH137.52

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