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Hydraulic plunger pump power control device and control method

A hydraulic plunger pump and power control technology, applied in the field of hydraulic control, can solve the problems of reduced system efficiency, poor fit, and many parts, and achieve the effects of high control accuracy, reduced efficiency, and fewer parts

Active Publication Date: 2016-05-25
JIANGSU HENGLI HYDRAULIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several kinds of power control pumps that are common in the market at present have their own characteristics in structural principle design, but they all have their own restrictive factors. The main ones are: the use of changing pressure difference for power control will reduce the system efficiency; the use of lever structure feedback Although the control precision of the power control method is high, there are many and complicated parts, and the cost is high; although the structure of the feedback control method using a lever to drive the valve sleeve (body) is simple, the power curve is replaced by two straight lines, which fit the ideal curve degree difference

Method used

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  • Hydraulic plunger pump power control device and control method
  • Hydraulic plunger pump power control device and control method
  • Hydraulic plunger pump power control device and control method

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Embodiment 1

[0023] See Figure 1 to Figure 5 , the present invention has a valve body 1, a valve core 2, a spring seat 3, an adjustment device 4, a feedback rod 5, a spring 6, a spring sleeve 7 and a variable piston 8 of a plunger pump; the valve body 1 is provided with an oil inlet P , oil outlet A and oil drain T; the spool 2 is set in the valve body 1, the spool 2 and the valve body 1 form a two-position three-way function, and the valve body 1 and the spool 2 are formed at one end of the spool 2 Drain chamber B; the spool 2 is provided with two steps of different diameters, the pressure oil in the oil inlet P is loaded through the steps, and the other end is preset by the spring 6 through the spring seat 3, and the center of the spool 2 is provided with a drain Oil hole C. The spring 6 is arranged in the spring sleeve 7; the spring sleeve 7 is arranged in the valve body 1, and one end of the spring sleeve 7 is in contact with the feedback rod 5; There is an oil drain chamber D betwe...

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Abstract

The invention relates to a hydraulic piston pump power control device and a hydraulic piston pump power control method. The hydraulic piston pump power control device comprises a valve body, a valve spool, a spring seat, a regulating device, a feedback rod, a spring and a spring housing; the valve spool is arranged in the valve body, and the valve spool and the valve body have two-position three-way functions; two steps different in diameter are arranged on the valve spool, pressure oil is loaded through the steps, and the other end of the valve spool is preset with force through the spring seat via the spring; the spring is of a pitch-variable structure and is arranged in the spring housing; the spring housing is arranged in the valve body with a hemisphere at one end contacting in the feedback rod; the feedback rod is hinged with the regulating device; the adjusting device is an eccentric pin in structure and is used for regulating size of power; control of the power is regulated under the joint effort of the regulating device, the spring and the feedback rod; an oil inlet P, an oil outlet A and an oil drainage port T are arranged in the valve body. The hydraulic piston pump power control device has the advantages of simple structure, few parts, low cost and the like; fitting degree of power curves and theoretical curves in the mentioned control method is high, and control accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of hydraulic control, in particular to a hydraulic plunger pump power control device and control method. Background technique [0002] Hydraulic plunger pumps are commonly used in construction machinery, and power control is a commonly used control method. Several kinds of power control pumps that are common in the market at present have their own characteristics in structural principle design, but they all have their own restrictive factors. The main ones are: the use of changing pressure difference for power control will reduce the system efficiency; the use of lever structure feedback Although the control precision of the power control method is high, there are many and complicated parts, and the cost is high; although the structure of the feedback control method using a lever to drive the valve sleeve (body) is simple, the power curve is replaced by two straight lines, which fit the ideal curve Poor deg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/22
Inventor 汪立平袁才富李童韦磊林大超华海铭
Owner JIANGSU HENGLI HYDRAULIC TECH CO LTD
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