Two-stage torsional vibration damper of engine

Abstract

The invention discloses a two-stage torsional vibration damper of an engine. The two-stage torsional vibration damper comprises a crankshaft. The crankshaft, an inner side torsional vibration damper and a crankshaft belt pulley are arranged in a positioning manner through positioning pins, and the inner side torsional vibration damper and the crankshaft belt pulley are installed at the front end of the crankshaft through short bolts; and a connecting spacer block and an outer torsional vibration damper are sequentially placed at the front end of the crankshaft belt pulley and fixed to the crankshaft through long bolts. According to the two-stage torsional vibration damper, by means of a combined structure of the crankshaft and the two-stage torsional vibration damper, the problem that torsional vibration of the engine with a single-stage torsional vibration damper exceeds the limit can be rapidly solved, redevelopment of a large-specification torsional vibration damper, a mounting hole in a cylinder body, a front end gear train and surrounding parts is avoided, and the development time and development cost are greatly saved. The two-stage torsional vibration damper is suitable for the engine.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine two-stage torsional vibration damper. Background technique [0002] In order to meet the customer's demand for greater power, the platform engine needs to increase the power, which brings greater vibration to the engine, and even causes the crankshaft torsional vibration to exceed the limit. In order to reduce the torsional vibration of the engine, a new large-scale torsional vibration damper was developed in the past: [0003] 1. Increase the diameter of the torsional vibration damper; [0004] 2. Increase the thickness of the torsional vibration damper; [0005] 3. Increase the diameter and thickness of the torsional vibration damper at the same time. [0006] But using the above method, the following problems will arise: [0007] 1. Increase the diameter of the torsional vibration damper—the layout space of the parts around the torsional vibration damper is occup...

AI Technical Summary

Problems solved by technology

[0003] 1. Increase the diameter of the torsional vibration damper;

[0004] 2. Increase the thickness of the torsional vibration damper;

[0007] 1. Increase the diameter of the torsional vibration damper—the layout space of the parts around the torsional vibration damper is occupied. The parts arranged at the front end such as the water pump and the front suspension need to adjust the installation position and redevelop, and the installation holes on the cylinder block are also To rearrange, the development cost and time cost are huge;

[0008] 2. Increase the thickness of the torsional vibration damper - the increase in the thickness of the torsional vibration damper will cause the position of the crankshaft pulley to protrude forward, which in turn will cause the entire wheel train to protrude synchronously, and the redevelopment of the gear train will also bring development costs and time increase in cost;

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