Self-locking hydraulic variable-diameter threshing cylinder and combine harvester

Abstract

The invention provides a self-locking hydraulic variable-diameter threshing cylinder and a combine harvester. The self-locking hydraulic variable-diameter threshing cylinder comprises a diameter adjusting device, a hydraulic transmission device, a hydraulic pump station and a signal acquisition control system, and the diameter adjusting device is located at the inner sides of supporting radial discs at the two sides of a threshing cylinder body; and the hydraulic transmission device transmits power to the diameter adjusting device. The cylinder threshing diameter can be steplessly adjusted through the diameter adjusting device; and a controller continuously adjusts the opening degree of three-position four-way electromagnetic proportional reversing valves based on real-time feedback signals of displacement sensors to control the input and output flow of hollow hydraulic cylinders, it is guaranteed that piston rods of the two hollow hydraulic cylinders synchronously move, and the diameter of the threshing cylinder body is synchronously adjusted in real time. After the diameter of the threshing cylinder body is adjusted, the threshed cylinder diameter can be effectively locked, and the operation stability of the threshing cylinder body is guaranteed. The working performance of the combine harvester can be effectively improved.

Description

technical field [0001] The invention relates to a grain threshing and separating device on a combine harvester, in particular to a self-locking hydraulic threshing diameter-adjustable threshing drum structure, which can realize stepless adjustment of the diameter of the threshing drum in real time. Background technique [0002] Threshing separation is an essential and crucial process in grain combined harvesting. The threshing drum is an important device of combined harvesting machinery, which separates the grain from the stem. Among them, the threshing gap of the threshing drum and the linear speed of the threshing element are important factors affecting the grain threshing performance. Because the physical and mechanical properties of different varieties of grains are quite different, and the annual output varies, so the fixed threshing gap and the linear speed of the threshing element lead to unsatisfactory threshing effect, and adjusting the threshing diameter of the dru...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of complex structure, heavy weight and poor automatic control of the variable diameter drum of the existing combine harvester, an automatic drum with simple and compact structure, light weight, fast response speed, high power density, and real-time, fast and stepless adjustment of the diameter of the threshing drum is provided. The locking hydraulic threshing drum device enables the threshing drum to quickly and steplessly adjust the threshing gap and the speed of the threshing element according to different operating objects and operating conditions, improving its threshing performance and operating stability

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