流量自动限制装置设计及特性研究

发布时间：2018-04-01 06:50

本文选题：流量自动限制装置　切入点：结构设计　出处：《华中科技大学》2011年硕士论文

【摘要】：流量自动限制装置用于某重大装备的液压系统中,对液压系统起安全保护作用。本文针对该重大装备中液压系统需求,参考现有限速切断阀结构及原理,研制出流量自动限制装置,设计了试验系统并进行仿真和试验,对装置抗冲击特性等进行了研究。 1)流量自动限制装置工作原理分析及结构设计。该装置为超流量自动切换装置,靠流量信号转化为压差信号后推动主阀芯动作以切断流道。流量自动限制装置除需具有自动切断作用外,同时还需具备手动和远程操纵功能,本文对该装置进行了新的原理设计。结构设计包括强度校核及材料选择等,重点介绍了主要结构件及阀芯弹簧的设计。 2)流量自动限制装置试验系统研究。设计了流量自动限制装置性能试验台,用来测试该装置的性能、安全性及可靠性。首先基于AMESim软件,在装置自动工作状态下,对试验系统产生符合压力要求的瞬态大流量的试验能力进行了仿真,然后搭建试验台,试验验证装置自动工作状态下的切换性能、密封性能,及手动、液动状态下的动作特性等。对仿真及试验结果进行了分析和研究,验证该试验系统满足流量自动限制装置的各项性能指标。 3)流量自动限制装置抗冲击特性仿真研究。建立了详细的流量自动限制装置在船用冲击指标下的抗冲击特性数学模型,在数学模型基础上通过使用MATLAB/Simulink模块对流量自动限制装置动态过程进行了动态仿真,对其仿真结果进行分析表明,在船用指标下,流量自动限制装置抗冲击特性良好,仿真模型及结果还可为流量自动限制装置及同类阀件的抗冲击特性研究奠定了一定的理论与实验基础。
[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.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137.52

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