摘要：电液位置伺服系统综合运用液压与电气知识，使液压与电气相结合，进而使系统具有精度高、反应迅速、输出大、易处理、变量得以反馈等优点。根据其输出力很大、精度高、反应灵活，方便控制的特点，在许多领域中有所运用。尤其是作为控制系统，有诸多运用，例如雷达与火炮控制。与一般液压系统相比，电液伺服系统的液压系统是高压，高压可以减少油液的可压缩量，提高位置控制的精度。一般液压系统对油液要求较低，伺服阀制造精度高，对液压油液有一定的要求。伺服系统中的油液清洁度一般不低于NAS6。油液清洁度越高，流过阀腔时与伺服阀的磨损越少，能保证伺服阀可以有效长期工作。油液随温度变化会改变油液粘度，使伺服阀的固有频率发生变化，改变系统工作稳定性。伺服系统的响应快这一特点使得泵站要有足够的流量与压力，为满足这一条件，泵站的建设往往较一般系统大的多。79609

毕业论文关键词：位置控制；液压；结构设计

Design of Hydraulic System for Electro - hydraulic Position Servo System

Abstract: Electro-hydraulic position servo system combines the use of hydraulic and electrical knowledge, so that the combination of hydraulic and electrical, so that the system has high precision, rapid response, output large, easy to handle, variable feedback and so on。 According to its output power is very large, high precision, flexible response, easy to control the characteristics of many areas have been used。 Especially as a control system, there are many applications, such as radar and artillery control。 Compared with the general hydraulic system, electro-hydraulic servo system hydraulic system is high pressure, high pressure can reduce the amount of oil can be compressed to improve the accuracy of position control。 General hydraulic system requirements for lower oil, servo valve manufacturing high precision, the hydraulic oil have certain requirements。 Servo system in the oil cleanliness is generally not lower than NAS6。 The higher the cleanliness of the oil, the less the wear of the servo valve when passing through the valve chamber, and ensures that the servo valve can work effectively for long periods of time。 Oil with the temperature changes will change the viscosity of the oil, so that the natural frequency of the servo valve changes, change the system stability。 Servo system response to this feature makes the pump station to have enough traffic and pressure, to meet this condition, the construction of pumping stations are often much larger than the general system。

KeyWords: position control; hydraulic; structural design

目录

1 绪论 3

2 液压位置伺服系统油路设计 4

2。1 设计方案 4

2。1。1 液压伺服系统方案 4

2。1。2 液压加载系统方案 6

2。2 计算 7

2。2。1 伺服系统回路计算 7

2。2。2 加载系统回路计算 8

2。2。3 液压阀的相关计算 8

2。2。4 液压附件的相关计算 9

2。3 系统回路