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Integrated control system of piston variable pump

A technology of integrated control system and integrated control components, applied in the direction of pump control, variable capacity pump components, pumps, etc., can solve the problems of pressure cut-off control safety protection failure and rise, so as to improve the safety of use and prevent pressure surges drop effect

Active Publication Date: 2020-02-28
LIYUAN HYDRAULIC (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of this problem, it is solved by setting a larger minimum displacement. Although it can ensure that the plunger variable pump has an output flow when the proportional solenoid suddenly fails, the main engine system pressure will be higher than the pressure during the pressure cut-off control process. The maximum pressure set by the cut-off control will continue to rise, and the safety protection function of the pressure cut-off control will basically fail

Method used

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  • Integrated control system of piston variable pump
  • Integrated control system of piston variable pump
  • Integrated control system of piston variable pump

Examples

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Embodiment Construction

[0023] Such as figure 1 with figure 2 As shown, an integrated control system for a variable displacement plunger pump of the present invention is installed in combination with a variable displacement plunger pump 1. The variable displacement plunger pump 1 includes a swash plate 10 installed on the variable displacement piston pump 1 Inside, its inclination angle determines the displacement of the variable displacement plunger pump 1 , and the variable displacement plunger pump 1 has a plunger pump oil inlet 101 and a plunger pump oil outlet 102 . The integrated control system of the plunger variable displacement pump includes a large connecting rod 111 , a small connecting rod 112 , a lower variable cylinder 11 , an upper variable cylinder 12 , an integrated control assembly 2 and a control oil circuit 30 . The large connecting rod 111 and the small connecting rod 112 are respectively hinged to two ends of the swash plate 10 . The large connecting rod 111 is connected to t...

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Abstract

The invention discloses an integrated control system of a piston variable pump, which is combined with the piston variable pump. The piston variable pump comprises an oblique plate, wherein the oblique plate is installed in the piston variable pump, and the displacement of the piston variable pump is determined according to the oblique angle of the oblique plate. The integrated control system of the piston variable pump comprises a big connecting rod, a small connecting rod, a lower variable cylinder, an upper variable cylinder, an integrated control assembly and a control oil way, wherein thebig connecting rod and the small connecting rod are respectively connected to both ends of the oblique plate, the big connecting rod is used as a piston of the lower variable cylinder and is connected with the lower variable cylinder, and the small connecting rod is used as a piston of the upper variable cylinder and is connected with the upper variable cylinder; high-pressure oil of an oil outlet or control oil of an external control port of the piston pump are usually introduced to the upper variable cylinder; the integrated control assembly is connected with the oil outlet of the piston pump by virtue of an oil way, and the integrated control assembly is connected with the small connecting rod; and the lower variable cylinder is connected with the integrated control assembly by virtueof the control oil way.

Description

technical field [0001] The invention relates to the technical field of hydraulic pump control systems, and more precisely relates to an integrated control system for a plunger variable displacement pump. Background technique [0002] In the hydraulic control system of construction machinery, the integrated control of electric proportional positive displacement control and pressure cut-off control is a commonly used variable mode for piston variable pumps. Among them, the electric proportional positive displacement control refers to the control method that automatically adjusts the displacement increase of the plunger variable pump by increasing the input control current. The use of electric proportional positive displacement control is conducive to the realization of the control programming of the host system, and through the signal collection and analysis of pressure sensors and flow sensors, the output current to the plunger variable pump is controlled by the program to qu...

Claims

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Application Information

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IPC IPC(8): F04B13/00F04B51/00F04B53/10F04B49/06F04B53/00F04B49/22
CPCF04B13/00F04B49/06F04B49/22F04B51/00F04B53/00F04B53/10
Inventor 张兴越杨光华李小明
Owner LIYUAN HYDRAULIC (SUZHOU) CO LTD
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