Clamping vibration device for integral torsional fatigue test of crankshaft

Abstract

The invention relates to a clamping vibration exciting device for an integral torsion fatigue test of a crankshaft, which comprises a base, a vibration exciter, one pair of vibrating plates, a testing bracket and clamping apparatuses. The testing bracket is fixed in the center of the base; two clamping apparatuses with bearings are fixed on two sides of the testing bracket; through holes are arranged in the middle of the vibrating plates; outer connecting sleeves are mounted in the through holes in an interference fit way; extending parts at the outer sides of the outer connecting sleeves areconnected with the bearings on the clamping apparatuses in the interference fit way; the inner sides of the outer connecting sleeves are connected with inner connecting sleeves; main shaft necks at two ends of the crankshaft are fixed in the inner connecting sleeves; and the crankshaft and the vibrating plates are integrally mounted on the testing bracket. A clamped crankshaft test piece can be subjected to the fatigue test through a testing system. The clamping vibration exciting device has a reasonable structure, is simple to manufacture, is easy to clamp and disassemble, and is convenient to operate; the whole crankshaft can be subjected to the torsion fatigue test under the condition that the crankshaft is not cut; and the clamping vibration exciting device for the integral torsion fatigue test of the crankshaft is ideal.

Description

technical field [0001] The invention relates to a crankshaft strength test device, in particular to a clamping vibration device for crankshaft integral torsion fatigue test. Background technique [0002] We know that the crankshaft is one of the most important components in the internal combustion engine, and its strength is directly related to the reliability of the whole machine, so it needs to be tested for fatigue strength. The crankshaft fatigue test uses the clamp body to clamp the test crankshaft or crank throw, and then applies an exciting force or eccentric force to a certain point of the fixture through a vibrator or an eccentric wheel, and this force is transmitted to the crankshaft torsional fatigue test system. The vibration signal collected by the meter is transmitted to the controller to form a closed loop. The force output by the exciter is a sinusoidal excitation force, and the crankshaft and the crankshaft torsional fatigue test system resonate at a common...

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Problems solved by technology

[0003] At present, in China, the torsional fatigue test of the crankshaft is performed on a single throw after cutting the crankshaft. The overall torsional fatigue test of the crankshaft is still a blank, and there is no special clamping vibration device for the torsional fatigue test of the entire crankshaft.

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