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A spool feedback piston hydraulic brake valve

A technology for hydraulic brake valves and spools, applied in valve devices, safety valves, multi-way valves, etc., can solve problems such as increasing compression, increasing push rod stroke, and high rigidity, and achieves reduced operating force, simple structure, The effect of low braking force

Inactive Publication Date: 2016-01-13
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the large balance force, the balance spring requires greater stiffness or increased compression. The large stiffness spring is not good for the control of output pressure accuracy, and increasing the compression will increase the stroke of the push rod

Method used

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  • A spool feedback piston hydraulic brake valve
  • A spool feedback piston hydraulic brake valve
  • A spool feedback piston hydraulic brake valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Examples, see Figure 3 to Figure 4 As shown, the spool feedback piston hydraulic brake valve of the present invention includes a valve body 1, a spool 2, a return spring 3, a balance spring 4 and a push rod 5; the valve body 1 has an input port 11, an output port 12. The oil return port 13 and the valve core chamber 14, the input port 11, the output port 12, and the oil return port 13 are respectively connected through the valve core chamber 14, the valve core 2 is slidingly connected in the valve core chamber 14, and the push rod 5 It is flexibly connected to the upper end of the spool 2; the spool cavity 14 is respectively provided with a first annular groove edge 141 and a second annular groove edge 142, and the spool 2 is respectively provided with a first shoulder 21 and a second shoulder 22 and the third shoulder 23, the balance spring 4 is elastically stretched between the bottom end of the push rod 5 and the third shoulder 23 of the valve core, and the return s...

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Abstract

The invention discloses a hydraulic brake valve of a feedback piston of a valve core. The hydraulic brake valve comprises a valve body, the valve core, a return spring, a balance spring and a push rod, wherein the valve body is provided with an input port, an output port, an oil return port and a valve core cavity, the input port, the output port and the oil return port are respectively communicated through the valve core cavity, the valve core is connected to the valve core cavity in a sliding manner, and the push rod is movably connected to the upper end of the valve core; a feedback passage is arranged in the valve core, and the feedback channel is communicated between the output port of the valve body and the bottom end of the valve core cavity; the hydraulic brake valve further comprises the feedback piston, wherein the upper part of the feedback piston is contained in the feedback passage, and the bottom end face of the feedback piston is in contact with the bottom surface of the valve core cavity. According to the invention, through redesigning the structure of the feedback passage and adding the feedback piston, the hydraulic brake valve has the characteristics of high flow, low control force, stable output pressure and controllable size.

Description

technical field [0001] The invention relates to a brake valve, in particular to a spool feedback piston hydraulic brake valve. Background technique [0002] In the hydraulic system, due to the requirements of actual working conditions, the output pressure of the liquid needs to be stable and its size can be controlled. For example, the hydraulic braking system and hydraulic clamping system of mobile construction machinery need to control the stability and magnitude of the braking force or clamping force, and the output force is determined by the pressure of the liquid, so in these systems Hydraulic pressure reducing valves that can control the liquid pressure and stabilize the output are widely used. However, many of these hydraulic systems require large flow output while controlling the pressure, which requires increasing the diameter of the spool, and increasing the diameter of the spool will increase the feedback area, and the increase of the feedback force improves the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K11/07F16K17/30
Inventor 皮钧凌西亮
Owner JIMEI UNIV
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