High-precision flow control hydraulic system of no-tillage seeder

CN115263847BActive Publication Date: 2025-12-12OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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Patent Information

Application Number
CN202210975764.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-08-15
Publication Date
2025-12-12
Estimated Expiration
2042-08-15

AI Technical Summary

Technical Problem

The existing hydraulic systems of no-till planters cannot achieve high-precision control, resulting in uncontrollable cylinder movement speed. Furthermore, the hydraulic systems of different tractors vary greatly, making precise adjustment difficult.

Method used

It adopts a two-position three-way hydraulic solenoid valve and a high-precision flow control valve, combined with the main and auxiliary hydraulic cylinders of the no-till planter. The movement of the valve core is controlled by a motor-driven reducer, which precisely adjusts the hydraulic oil flow to control the cylinder speed.

Benefits of technology

It achieves precise flow control of the hydraulic system of the no-till seeder, solves the problem of parts damage caused by excessive cylinder speed, and ensures precise cylinder action control under different tractors.

✦ Generated by Eureka AI based on patent content.

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    Figure CN115263847B_ABST
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Abstract

The application discloses a high-precision flow control hydraulic system of a no-tillage seeding machine. The high-precision flow control valve comprises a valve core rotating sleeve, a valve core rotating sleeve top rod and a speed reducer. The hollow shaft output hole of the speed reducer is matched with the valve core rotating sleeve through a key, one end of the valve core rotating sleeve is connected with the valve core through a thread, the other end of the valve core is arranged in a guide sleeve, and a crescent-shaped oil passage is formed on the circumference of the valve core. An oil inlet and an oil outlet are formed on the valve body, the oil inlet and the oil outlet are communicated through the crescent-shaped oil passage, the oil passage is corresponding to the position of a sealing element in the valve body, one side of the sealing element is the oil inlet of the oil passage, the other side is the oil outlet of the oil passage, the translation of the valve core changes the area of the oil inlet of the oil passage, thereby precisely controlling the flow of the hydraulic oil from the oil inlet to the oil outlet. The application can realize the accurate control of the hydraulic oil flow of the hydraulic system, thereby ensuring the accurate control of the action speed of the main and auxiliary oil cylinders of the no-tillage seeding machine.
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Citation Information

Patent Citations

  • Hydraulic turnover device for overweight driving cabs

    CN201999091U

  • High-precision flow control hydraulic system of no-tillage planter

    CN218000024U

  • Ball screw driven hydraulic control valve

    JP2000028023A