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Variable pump control valve

A technology of control valve and hydraulic control valve, which is applied to variable displacement pump components, components of pumping devices for elastic fluids, pump components, etc., and can solve problems such as large market demand.

Active Publication Date: 2015-02-25
CHONGQING HONGJIANG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Control valves are vulnerable parts, and their market demand is large

Method used

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  • Variable pump control valve
  • Variable pump control valve
  • Variable pump control valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment one: see Figure 1 to Figure 8 , a control valve for a closed-loop two-way variable displacement pump, consisting of a main valve and two control valves respectively connected to both ends of the main valve. Its outstanding substantive features are:

[0036] The main valve includes the main valve body 1, the slide valve 2 arranged in the main valve body along the X direction (that is, the left and right directions), and the spool valve 2 arranged in the main valve body along the Y direction (that is, the front and rear directions) with one end protruding from the eccentricity of the main valve body. Axis 6, the feedback lever 3 arranged in the main valve body along the Z direction (that is, up and down) and whose lower end extends out of the main valve body, the eccentric shaft is located under the slide valve and passes through the hole in the middle of the feedback lever, and also includes the The tension spring 5 that the left spring pull bar 4 and the ri...

Embodiment 2

[0043] Embodiment two: see figure 1 and Figure 9 , the control valve of a closed loop two-way variable pump, the control valves connected to both ends of the main valve are solenoid valves, and the two solenoid valves are respectively connected to the control power supply. The two solenoid valves are proportional solenoid valves (control voltage DC24V, working current 200mA~600mA, electromagnetic force 35~80N, such as PM-6H-045) and the two hydraulic control valves, both convert external control signals is the axial force acting on the spool.

[0044] The invention patent is installed on the reversing piston of the two-way closed variable variable pump (referred to as the variable variable pump), and the signals at both ends of the main valve body are connected externally, and then the reversing piston is controlled to make the swash plate tilt, thereby controlling the output flow of the variable variable pump. .

[0045] When the hydraulic control valve is use...

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PUM

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Abstract

The invention relates to a variable pump control valve comprising a main valve and two control valves connected at two ends of the main valve respectively. The main valve comprises a main valve body, a slide valve, an eccentric shaft, a reaction lever, a left spring pull rod, a right spring pull rod and an extension spring, wherein the slide valve is arranged in the main valve body along the X direction, the eccentric shaft of a four-step cylinder structure is arranged in the main valve body along the Y direction, is positioned below the slide valve and passes through a hole in the middle of the reaction lever, one end of the eccentric shaft extends out of the main valve body, the reaction lever is arranged in the main valve body along the Z direction, the lower end of the reaction lever extends out of the main valve body, the left spring pull rod and the right spring pull rod are matched with the eccentric shaft, two ends of the extension spring hook the upper ends of the left spring pull rod and the right spring pull rod respectively, a third-step cylinder of the eccentric shaft is matched with the hole in the middle of the reaction lever, and the lower end of the reaction lever is connected with a control piston of a closed-circuit two-way variable pump. The variable pump control valve has the advantages that remote control of the pump can be achieved by a small quantity of pressure oil or a direct-current power supply, and switching between hydraulic control and electronic control only by replacing the control valves without replacing the main valve can be achieved.

Description

technical field [0001] The invention relates to a hydraulic control component, in particular to a variable pump control valve. The piston body used to adjust the control piston in the pump moves left and right, thereby driving the change of the inclination angle of the swash plate; the change of the inclination angle of the swash plate makes the displacement of the pump realize a stepless change between zero and the maximum value; the inclination direction of the swash plate relative to the horizontal position Determines the inlet and outlet of the pump. The invention patent is applicable to closed pumps in construction machinery, agricultural and forestry machinery, road machinery, cranes, drilling rigs and other fields. Background technique [0002] With the development trend of intelligence and automation in construction machinery and other fields, it is particularly important to realize the remote control of the pump control method; to ensure that the control valve ...

Claims

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Application Information

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IPC IPC(8): F15B13/02F04B53/10
CPCF04B53/10
Inventor 梁宏喜王康刘新功
Owner CHONGQING HONGJIANG MACHINERY