Excitation method and exciter of double quality flywheel torsional oscillation

Abstract

The invention relates to an excitation method and a shaker of dual mass flywheel torsional vibration. The method adopts a variable frequency motor to drive components including a rotatable hydraulic rotary cylinder, a dual mass flywheel, thus stimulating rotate speed of an engine; rotatable hydraulic rotary cylinder is adopted to provide pendulum motion for the main and sub flywheel of the dual mass flywheel, so that torsional vibration can be stimulated. The shaker includes a dual mass flywheel and the rotate and pendulum driven mechanism; in the rotate and pendulum driven mechanism, the rotary cylinder body of the rotatable hydraulic rotary cylinder (8) is connected with the sub flywheel (15) connecting with the main flywheel (13) and a rotary cylinder shaft (4) at the same side through a transmission sleeve (11) connecting to the rotary cylinder right end cover (9); a torsional transducer (10) and a turbulence iron core of an angular sensor (12) are arranged on the sub flywheel shaft, a winding of the angular sensor is positioned on the transmission sleeve fixedly connected with the main flywheel. The invention can stimulate all the torsional vibration of an engine, and realize dynamic experiment of dual mass flywheel torsional vibration capability.

Description

technical field [0001] The invention relates to an excitation method and an exciter for an automobile engine double-mass flywheel torsional vibration performance test bench. Background technique [0002] During the working process of the engine, on the one hand, the crankshaft is subject to periodically changing forces, and the speed also changes periodically. On the other hand, the large moment of inertia of the crankshaft shaft system makes the speed tend to be uniform. torsional vibration. Because the crankshaft is long, the torsional stiffness is small, and the moment of inertia of the crankshaft shaft system is large, the frequency of the crankshaft torsional vibration is low, and it is easy to resonate with the transmission system within the operating speed range of the engine, which will aggravate the wear and tear of transmission parts and gearbox parts. premature failure, or even breakage. Therefore, torsional vibration is an important factor that must be consider...

AI Technical Summary

Problems solved by technology

For example: the cardan shaft vibrator uses the cardan shaft to deviate from the main axis by a set excitation angle, causing torsional vibration during rotation. The torsional vibration range of the mass flywheel is not good; the hydraulically actuated vibrator uses a hydraulic drive method to make the piston rod reciprocate, so that the shock absorber produces torsional vibration, which produces torsional vibration. This method only torsional vibration does not rotate, so it cannot be simulated The torsional vibration of the dual-mass flywheel during rotation is not suitable for dynamic testing

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