Measuring device for detecting leakage from hydraulic components has pressure senor for measuring pressure in piston and displacement sensor for piston rod path

摘要

A hydraulic pressure cylinder (2) and its piston volume (3) is connected to a hydraulic volume (4) of the component (1) so that it is sealed to the outside. The piston volume is filled with an incompressible fluid, such as hydraulic oil, and the pressure cylinder is acted on by the piston (5). A controllable venting hole (7) is provided through the piston and its piston rod (6). The piston rod is operatively connected to a test pressure generator. A pressure sensor (9) is provided at the piston volume of the pressure cylinder for measuring the pressure of the incompressible fluid. A displacement measuring sensor (8) is arranged on the piston rod for measuring its displacement. The test pressure generated may comprise a controllable electric drive.