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A self-adaptive pilot-operated electro-hydraulic proportional threaded cartridge valve for mountains and hills

An electro-hydraulic proportional and screw-inserted technology, applied in fluid pressure actuating devices, servo motor components, mechanical equipment, etc., can solve the problems affecting the position and attitude of the suspension unit and the ground, affecting the quality of work, and changing the position and attitude. Keep tillage depth constant, avoid energy loss, compact enhancement effect

Inactive Publication Date: 2020-03-10
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The land in hilly and mountainous areas is usually undulating. If the usual way of connecting the suspension unit and the tractor is used, it will inevitably cause a large change in the position and attitude between the farm implements and the ground, which will seriously affect the quality of work; in addition, the leveling of the tractor body will also affect The position and attitude between the suspension unit and the ground

Method used

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  • A self-adaptive pilot-operated electro-hydraulic proportional threaded cartridge valve for mountains and hills
  • A self-adaptive pilot-operated electro-hydraulic proportional threaded cartridge valve for mountains and hills
  • A self-adaptive pilot-operated electro-hydraulic proportional threaded cartridge valve for mountains and hills

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Embodiment Construction

[0027] Embodiments of the present invention are further described below in conjunction with the accompanying drawings;

[0028] Such as figure 1 and Figure 5 As shown, the embodiment of the present invention includes: main valve spool 1, main valve sleeve 2, armature sleeve 3, pilot valve return spring 4, armature 5, pilot spool 6, armature return spring 7, magnetic isolation pad 8 and Electromagnet 9; wherein the main valve sleeve 2 is cylindrical, the lower end of the main valve sleeve 2 is provided with a stepped hole 203 and an oil outlet 201 in sequence, and the main valve sleeve 2 is connected to the armature sleeve 3 through the thread at the upper end, The main valve spool 1 is slid in the main valve sleeve 2 in the axial direction, and the pilot spool 6 is slid in the main valve spool 1 in the axial direction. The pilot spool 6 connects with the armature through the upper cylindrical protrusion 604 5 connected, the pilot spool 6, the armature 5 and the iron core 90...

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Abstract

The invention discloses a mountainous hilly adaptive pilot-operated type electrohydraulic proportional thread cartridge valve, and belongs to the field of valves. Main valve sleeves are cylindrical, the lower ends of the main valve sleeves are sequentially provided with a step hole and an oil outlet, the main valve sleeves are connected with armature sleeves through threads on the upper end, mainvalve cores are slidably arranged in the main valve sleeves in the axial direction, a pilot-operated valve core is slidably arranged in the main valve cores in the axial direction, and connected witharmatures through a cylindrical bulge part on the upper end. The pilot-operated valve core, the armatures, and iron cores of electromagnets are sequentially installed in the armature sleeves from bottom to top, and a magnetic isolation pad is fixedly connected into a grooving at the lower ends of the iron cores. According to the mountainous hilly adaptive pilot-operated type electrohydraulic proportional thread cartridge valve, the pilot-operated valve core is arranged in the main valve cores to enhance compact inside the valve and reduce the valve body, especially smaller than a plate pilot valve; a main valve adopts the form of combining annular buffer head end face and rectangular groove to realize segmenting throttling and adjustable flow; and the problems of oil leakage due to a cylinder sliding valve adopted in rear suspension of a tractor, loose sealing and up-down vibration in rear suspension are solved.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to an adaptive pilot type electro-hydraulic proportional threaded cartridge valve for mountains and hills. Background technique [0002] Tractor is an important power machine to realize agricultural mechanization and modernization. In the past ten years, the rapid development of electronic control technology and the application of intelligent transportation in automotive applications have led to the application of electronic control technology in tractors, and modern new tractor products are increasingly moving toward automation and intelligence. direction development. [0003] The land in hilly and mountainous areas is usually undulating. If the usual way of connecting the suspension unit and the tractor is used, it will inevitably cause a large change in the position and posture between the farm implements and the ground, which will seriously affect the quality of work; in additio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 朱忠祥邵明玺李臻刘栋辛喆徐晨翔
Owner CHINA AGRI UNIV
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