Hydraulic driving device for draught fan of pneumatic type seeding machine

Abstract

The invention provides a hydraulic driving device for a draught fan of a pneumatic type seeding machine, relating to the technical field of pneumatic type seeding machines. The hydraulic driving device is characterized in that a power output shaft of a tractor is connected with an oil pump and drives the oil pump to rotate, power oil supplied by the oil pump is conveyed to a hydraulic motor by an oil pump outlet pipe and a hydraulic motor inlet pipe, the hydraulic motor drives the draught fan for seeding to rotate, and is communicated with an oil tank by a hydraulic motor outlet pipe, a hydraulic control element is arranged in a hydraulic system, and the running speed of the draught fan for seeding is controlled by the hydraulic control element. The hydraulic driving device has the beneficial effects of being matched with the tractor conveniently, ensuring the stable rotation of the hydraulic motor for driving the draught fan for seeding without limitation of the size of an oil valve of the tractor to finally achieve ideal seeding, and overcoming the phenomena of unstable wind power, seedling shortage and seedlingless ridges caused by turning, stopping, machine tool lifting and the like of the existing domestic pneumatic type seeding; besides, the hydraulic driving device has the characteristics of simple and compact structure, small occupied area, convenience in adjustment and reliability in working.

Description

technical field [0001] The invention relates to the technical field of pneumatic seeders. Background technique [0002] Pneumatic seeders have become the preferred model for precision seeding in the world today. The wind power of the pneumatic seeder comes from the fan. Most of the pneumatic seeders produced in my country are driven by the power output shaft of the tractor through the universal joint and the speed change mechanism. Such a structure and transmission mode cause the speed of the fan to change from The throttle of the tractor is controlled. If the throttle is unstable, the speed of the fan will be unstable, and the airflow pressure and flow will be unstable, which will easily cause seedling shortage and break the ridge; Damage to the gimbal. The stable speed of the fan is the key to ensure that there is no shortage of seedlings. For this reason, developed countries in foreign countries have adopted hydraulic motors to drive the fan, and the fan speed has been st...

AI Technical Summary

Problems solved by technology

Our country also wants to adopt this technology, but because the hydraulic system of the domestic tractor itself cannot meet the requirements of continuous and stable rotation of the seeding fan at the head, middle and tail of the field during sowing operations, it has seriously affected the promotion and application of pneumatic sowing in our country

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