INSTALLATION FOR LIFETIME TESTING OF PLUNGER MACHINES Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: installation has working chamber 2 mounted on frame 1, guide 3, and plunger drive 4. The plunger provided with barrel 19 to be tested is set in sealing unit 5 of the working chamber and rigidly secured with slide 14 through rod 15. Working chamber 2 and cap 7 mounted on the chamber define a space for solution and device for creating pressure owing to compression air supplied to the cap from a vessel. Tension spring 20 with fixed suspension 21 for weights serves for creating lateral efforts at rod 15. As ball valves are absent, there is no grinding of sand in the solution, and, hence, the sand holds its abrasive properties without changing. EFFECT: enhanced reliability of testing. 1 dwg