Design of Laboratory Test Equipment for Testing the Hydrostatic Transducers

Abstract

The article presented describes a new design of measuring chains in laboratory test equipment, which are used for testing the hydrostatic transducers and hydraulic fluids. Laboratory test equipment allows simultaneous observation of parameters of hydrostatic transducers and hydraulic fluids by simulating the operating conditions under laboratory conditions, what can significantly reduce the testing time and economic costs. The new design functionality was verified via measurement of the basic parameters of hydrostatic transducers and changing the load of hydraulic fluids. Based on the results measured, the flow efficiency of tested hydrostatic transducer UD-25R was calculated and compared with the transducer parameters specified by the manufacturer using different types of operating hydraulic fluids. Verification measurements of the unloaded hydrostatic transducer were performed at various rotation speeds: Q250 = 5.694 dm3·rpm at speed of n1 = 250 rpm; Q500 = 12.286 dm3·rpm at speed of n2 = 500 rpm; Q750 = 18.747 dm3·rpm at speed of n3 = 750 rpm. Based on the hydrostatic transducer flow rate, the UD-25R transducer flow efficiency was determined: at n1 = 250 rpm, the flow efficiency was η250 = 0.8946; at n2 = 500 rpm, the efficiency was η500 = 0.9651; at n3 = 750 rpm, the flow efficiency was η750 = 0.9812.

Keywords

• hydraulic pump
• hydraulic circuits
• measuring chain
• verification measurement
• hydraulic equipment