Automatic adjusting device and method for vibration frequency of vibrating screen

Abstract

The invention discloses an automatic adjusting device and method for the vibration frequency of a vibrating screen. The automatic adjusting device for the vibration frequency of the vibrating screen comprises a driving sprocket, a rack, a main driven shaft, a vibrating screen, a driving shaft, a torsional stress test system, a stepless speed changing device, a vice driven shaft and a signal receiving and processing system. The torsional stress on the main driven shaft is monitored and subjected to data processing analyzing, and a feedback signal is transmitted to a hydraulic pressure control unit, so that the transmission ratio of the stepless speed changing device is changed, and automatic adjusting of the vibration frequency of the vibrating screen is completed. The automatic adjusting device and method for the vibration frequency of the vibrating screen can be used for torsional stress monitoring of the main driven shaft of a combined harvester during field harvest and for automatic adjusting of the vibration frequency of the vibrating screen; monitoring equipment is convenient to mount and dismount, a monitoring system is intelligent, the hydraulic pressure control unit controls the stepless speed changing device to change the transmission ratio, and changing of the transmission ratio is quick and accurate and high in precision; and working is safe and reliable, the service life is long, and cleaning operation of different crops with different feed quantities can be achieved through parameter adjustment of a signal receiving and processing system.

Description

technical field [0001] The present invention relates to a vibrating screen vibration frequency automatic adjustment device and adjustment method. Specifically, it controls the work of the hydraulic control unit by collecting and processing the torsional stress on the driving and driven shafts to generate a feedback signal, and adjusts the transmission ratio of the continuously variable transmission device. , which can realize the automatic adjustment of the vibration frequency of the vibrating screen. Background technique [0002] The vibrating screen is the core component of the cleaning device of the combine harvester, which is combined with the fan to form a fan sieve type cleaning device. The grain mixture is first concentrated on the shaking slide or step plate, and then sent to the front end of the sieve. The light debris is blown away along the air duct, the large debris is discharged from the tail of the sieve, and the grains flow into the auger or the grain outle...

AI Technical Summary

Problems solved by technology

[0003] Due to the obvious differences in the operating objects of the combine harvester, the ever-changing and different operating conditions, and the relatively complicated operating environment, these have significantly affected the performance of the cleaning device. The vibration frequency of the vibrating screen of the traditional cleaning device can only be Manually and according to experience, the diameter of the transmission wheel is changed to change the transmission ratio for stepwise adjustment. It is impossible to automatically adjust the vibration frequency of the vibrating screen to ensure the cleaning performance according to the changes in the operation object and environment, and its harvesting adaptability is relatively poor.

If the vibration frequency of the vibrating sieve is too low, the grains will be taken out of the machine before passing through the sieve holes and separated from the mixture, which increases the cleaning loss; if the vibration frequency is too high, the sieving ability of the grains cannot be significantly improved, and The power consumption of the vibrating screen will be relatively large, which will cause serious unnecessary energy consumption and poor economy

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