Analysis Of Function And Structure Of The New Hydraulic Cylinder Test-Bed And Research On Character Of Pressure Control

Cylinders are linear actuators whose output force or motion is in a straight line. Their function is to convert hydraulic power into linear mechanical power. Therefore, cylinder is an important part of the hydraulic system. And the performance of hydraulic cylinders often directly determines the performance of the machinery. Moreover, the type test and the factory test of hydraulic cylinder are emphasis attached to testing the performance of the hydraulic cylinder, and it is of great significant to improve the performance and the quality of hydraulic cylinders. Also the accuracy of the measured data has a close bearing on the quality of the hydraulic cylinder. However, there are many problems of hydraulic cylinder test-bed in China, such as lacking of consistency in test methods, high labor intensity of operator, low accuracy of testing, poor degree of automation and inefficiency. Meanwhile, the test items often cannot meet national standard. Therefore, we designed and manufactured a new test-bed of hydraulic cylinder to improve and overcome the above problems.A new hydraulic test-bed of cylinder was designed and manufactured, which can perform hydraulic cylinder type test, factory test and the ultrahigh pressure test with 70Mpa. In addition, six hydraulic cylinders can be tested at the same time, and also the test-bed can simultaneously complete three types of test which are the routine test, high temperature test and ultrahigh pressure test. Besides, the new test-bed can achieve goals which are remote pressure control, multiple speed adjustment, proportional loading, automatic oil discharge, automatic control of oil temperature, noncontact measurement of hydraulic cylinder's stroke, and intelligent control of hydraulic system. The new hydraulic test-bed of cylinder has the great significance.