外文资料翻译---伺服阀试验台计算机辅助测试系统的研制

Study on Computer Assistant Test System of ServoValve Test-bed Abstract：According to the need of the static and dynamic characteristics of the test on servo valve , firstly this article introduces the necessary part of the system-the pump station. Next, it designs the corresponding hydraulic an d computer-aided test system and given the composition of software and har dware of the test system and the design process of software.In the end,we a pply the designed system to actual production to prove that it achieve the r equirements of the test on servo valve.

Key words：servo valve, test rig, CAT, dynamic and static characteristics

1. Introduction

Electro-hydraulic servo valve is the frequently-used control component in measurement and control system. Due to the wide use of electro-hydraulic servo system in metallurgy, engineering machinery, and chemical industry, a large number of servo valves are also be applied in these industries.Affect by the facters of environmental，abrasion,aging and so on,servo valve will malfunction inevitably and need repairs after using a certain time.After maintenance and repair,we must detect the servo valve through some certain testing methods of dynamic and static to decide whether its various properties meet the stipulated requirements or not. Thus,large enterprises establish independent servo valve test-bed according to the own needs.What is described below is a servo valve test-bed developed jointly by our unit and a university and the test-bed is based on computer-aided testing.

2.Hydraulic pump station

Hydraulic pump station also known as the pump station is an independent hydraulic device. It offers oil according to the requirements gradually and controlls the direction, pressure and flow rate of hydraulic oil, applied to the mainframe and hydraulic devices separability of hydraulic machinery. After the purchase users just connect hydraulic station and host of implementing agencies (motor oil or fuel tanks) with tubing, and hydraulic machinery can be realize these movements and the work cycle.

Hydraulic pump station consists of pump device, block or valve, tanks, a combination of electrical boxes.The function of each components are as follows:

(1)Pump device is equipped with motors and pumps, is the source of power of the hydraulic station. It changes mechanical energy into hydraulic oil pressure energy.

(2)Integration block is assembled by hydraulic valve and channel body. It can adjust the direction, pressure and flow of the hydraulic oil.

(3)Valve portfolio plate valve is installed in the board and channels connect with each other after the board witch is the same as integration valve.

(4)Tank plate is a welding semi-closed container, and also located with oil filtering network and air filters used for oil, oil filters and cooling.

(5)Electrical boxes have two patterns. One designs external fuse terminal plate; The other installs a full range of electrical control.

Hydraulic station principle: motor driven pump rotation, and pump absorbs