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A spool of a multi-way valve

A multi-way valve and valve core technology, applied in the direction of fluid pressure actuation device, servo motor assembly, mechanical equipment, etc., can solve the problems affecting the performance and life of the multi-way valve, the deviation of the valve core, the deviation of the valve core position, etc. , to avoid deviation of the spool position and ensure the performance and life.

Active Publication Date: 2016-08-24
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is: when the spool is longer, the spool will have deviation problems, which will affect the performance and life of the multi-way valve
The reason is that, when the spool is long and the oil pressure at both ends of the sealing shoulder 2 is not equal, the force received by the ring grooves at different positions of the annular sealing groove 3 must be due to the non-uniformity of the oil supply position. There are differences, so the position of the spool will deviate, and the longer the spool, the more serious the problem of deviation

Method used

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  • A spool of a multi-way valve
  • A spool of a multi-way valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] For the spool of a certain type of excavator multi-way valve, the sealing shoulder 2 has a diameter of 18mm and a length of 12.5mm. There are two annular sealing grooves 3 and one spiral pressure equalizing groove 6 on the outer cylindrical surface of the sealing shoulder 2. The sealing groove 3 has a depth of 0.5mm and a width of 1mm, and the central angle α=360° corresponding to the left end to the right end of the spiral pressure equalizing groove 6 .

Embodiment 2

[0013] For the spool of a multi-way valve of a certain type of wheel loader, the diameter of the sealing shoulder 2 is 20mm and the length is 12.5mm. There are 2 annular sealing grooves 3 and 2 spiral pressure equalizing grooves 6 on the outer cylindrical surface of the sealing shoulder 2 , the depth of the annular sealing groove 3 is 0.5 mm, the width is 0.8 mm, and the central angle α=270° corresponding to the left end to the right end of the spiral pressure equalizing groove 6 .

Embodiment 3

[0015] The valve core of a crawler grader multi-way valve has a sealing shoulder 2 with a diameter of 22 mm and a length of 15 mm. There are 2 annular sealing grooves 3 and 4 spiral pressure equalizing grooves 6 on the outer cylindrical surface of the sealing shoulder 2. The depth of the annular sealing groove 3 is 0.5 mm, the width is 0.5 mm, and the central angle α=180° corresponding to the left end to the right end of the spiral pressure equalizing groove 6 .

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Abstract

The invention belongs to the hydraulic valve design technology and relates to multi-way valve spool structure improvement. The spool is characterized in that two annular seal grooves (3) and n spiral pressure grooves (6) are formed in the outer cylindrical surfaces of a seal convex shoulder (2). According to the improved multi-way valve spool structure, the problem of valve spool shifting when the valve spool is long can be avoided, and the performance and service life of the multi-way valve are guaranteed.

Description

technical field [0001] The invention belongs to the hydraulic valve design technology and relates to the improvement of the valve core structure of a multi-way valve. Background technique [0002] For the spool structure of a current multi-way valve of construction machinery, see figure 1 , it is composed of the spring seat 1 on the left, the sealing shoulder 2 on the right side of the spring seat 1, the annular overflow groove 4 on the right side of the sealing shoulder 2 and the working section 5 on the right end. On the outer cylindrical surface of the sealing shoulder 2, there are 2 to 8 annular sealing grooves 3 with a rectangular or U-shaped cross section, and the spacing between the annular sealing grooves 3 is uniform and parallel to each other. The function of the annular sealing groove 3 is mainly sealing and anti-pollution. Its disadvantage is: when the spool is longer, the spool will have a deviation problem, which will affect the performance and life of the mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 李进杨亚威党亚娟
Owner XIAN AERO ENGINE CONTROLS