Overload protection device and method applied to pulverizer

Abstract

The invention relates to an overload protection device and method applied to a pulverizer. The overload protection device comprises a rectifying circuit, a voltage comparator, a single chip microcomputer, a voltage stabilizing circuit and an electromagnetic clutch control circuit. Wherein the voltage comparator is respectively connected with the rectifying circuit and the single chip microcomputer; the voltage stabilizing circuit is connected with the rectifying circuit and the single-chip microcomputer. The single-chip microcomputer is connected with the electromagnetic clutch control circuit. The rotating speed of the engine is obtained through an alternating current signal of the magneto, the single chip microcomputer is used for judging whether the rotating speed of the engine is larger than the pull-in rotating speed or smaller than the separation rotating speed so as to judge whether the pulverizer is overloaded or not, and the electromagnetic clutch control circuit is driven to achieve separation and pull-in of the clutch.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery in hilly and mountainous areas, in particular to an overload protection device and method applied to pulverizers. Background technique [0002] The branch shredder is mainly used to crush the branches after pruning and felling, and laying the crushed branches around the fruit trees can greatly improve the soil structure, increase the soil organic matter, humus, fulvic acid content and the ability to retain fertilizer and water. To achieve the purpose of promoting the growth and development of fruit trees and improving fruit quality. When the crushing device is overloaded and the shaft speed drops, and the normal rotation of the engine crankshaft is restrained by the pulley and the belt, the engine speed drops sharply and may cause flameout, which greatly affects the smooth progress of the crushing operation. An overload protection device is needed to control the load of the shredde...

AI Technical Summary

Problems solved by technology

[0003] The existing overload protection method of the crushing device of the branch shredder is a mechanically controlled overload protection method, which uses the throttle linkage plate to control the travel switch through the mechanical pull rod, and then controls the electromagnetic clutch to achieve overload protection. However, this method will There are shortcomings of long factory commissioning time, large differences in control strategies between machines, unsatisfactory sensitivity and short maintenance intervals

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