Fatigue test stand for torsion damper and fatigue test method thereof

Abstract

The invention discloses a fatigue test stand for a torsion damper. The fatigue test stand comprises an experiment platform, the torsion damper, a torsion vibration shaft and a permanent magnet synchronous motor having a controller. The experiment platform is equipped with a first base, a second base and a third base through bolts. The first base is equipped with a thermostatic chamber; the torsion damper is arranged in the thermostatic chamber; the torsion damper is connected with a damper connection disc; the damper connection disc is connected with one end of the torsion vibration shaft; the other end of the torsion vibration shaft is connected with the output shaft of the permanent magnet synchronous motor through a shaft coupler; the torsion vibration shaft passes through the second base and the third base; and an inertia disc group is detachably arranged on the torsion vibration shaft between the second base and the third base. The test stand not only can realize high-frequency torsion vibration similar to that in engine test, but also can realize adjustable inherent frequency of the device, thereby reducing the original very-long test period and achieving the quick detection effect. The invention also discloses a fatigue test method for carrying out reliability test on different torsion dampers by utilizing the test stand.

Description

technical field [0001] The invention relates to the field of fatigue testing of engine torsional shock absorbers, in particular to a fatigue test bench for torsional shock absorbers and a fatigue testing method thereof. Background technique [0002] Silicone oil damper is the crankshaft torsional vibration damper widely used in diesel engines. The silicone oil shock absorber well matched with the crankshaft system can greatly attenuate the torsional vibration at the free end of the crankshaft, thus ensuring the reliable operation of the diesel engine. Therefore, the reliability of the silicone oil shock absorber will directly affect the reliability of the whole machine. In the design stage, after the matching design of the silicone oil shock absorber is completed, it needs to be installed on the crankshaft of the engine to check the damping effect and conduct a reliability assessment test, and mass production can only be carried out after meeting the requirements. In the m...

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Problems solved by technology

[0004] Existing torsional shock absorber test benches generally form torsional motion in a mechanical way, and most of them use the misalignment of the geometric center and inertial center to generate alternating torque for testing, but it is difficult to generate 150HZ similar to the actual engine test high-frequency vibration, and the durability of the existing test bench is poor

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