Vibration analysis method and detection system for double-threshing-cylinder chain transmission system of combine harvester

Abstract

The invention provides a vibration analysis method and detection system for a double-threshing-cylinder chain transmission system of a combine harvester. The vibration analysis method comprises the following steps of establishing a chain transmission transverse vibration model of the double-threshing-cylinder chain transmission system; constructing a two-degree-of-freedom oscillatory differential equation of the double-threshing-cylinder chain transmission system; a two-degree-of-freedom oscillatory differential equation being simplified, a driven roller generating unbalance or eccentricity to cause excitation of the chain transmission system, and static coupling being decoupled according to the coordinate transformation based on the oscillatory differential equation of the double-threshing-roller chain transmission system. The detection system is designed to obtain the vibration quantity of the threshing cylinders installed in a chain transmission mode, and a foundation is laid for calculating the unbalance quantity of the threshing cylinders which are aggravated due to chain transmission transverse vibration when the threshing cylinders work in a load mode.

Description

Technical field [0001] The present invention relates to the field of agricultural machinery, and more particularly to a combined harvester dual-penetrating roller chain drive system vibration analysis method and a detection system. Background technique [0002] In recent years, in order to ensure the stability of agricultural machinery, the growth of life, the vibration problem of machinery has become a concern. Rotating machinery is widely used in agricultural machinery, while the imbalance of rotating machinery has exacerbated the vibration and noise of the whole machine, resulting in a decrease in operation, and the machine failure is frequent, the machine works is shortened. The thiror is the main working component of the combined harvester for thilled separation. Its transmission mode has a large chain transmission, which has an average transmission ratio, high efficiency, high reliability, high transmission power, strong overload capacity. However, chain transmission is eas...

AI Technical Summary

Problems solved by technology

[0004] In the existing single or multiple rotor system vibration analysis methods and systems, when multiple threshing drums adopt chain transmission as the transmission form, the longitudinal vibration and lateral vibration of the chain transmission are the main excitation sources of the chain transmission, and the longitudinal vibration affects the movement of the chain. Uniformity and transmission have a great influence, while lateral vibration will affect the stability of chain transmission and produce meshing impact

The unbalance of the threshing drum itself will aggravate the meshing impact and vibration during chain transmission, and its lateral vibration will generate a large dynamic load, which will aggravate the vibration of the chain side, resulting in the unbalanced phenomenon of multiple threshing drums during operation. solve

Images