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Position-spring-force feedback type electric proportional variable axial plunger pump

A technology of axial piston pump and force feedback, which is applied in the direction of pumps, multi-cylinder pumps, liquid displacement machinery, etc., can solve the problems of long stroke and difficulty in realizing electronic closed-loop control, and achieve sensitive action, simple structure, and simplified The effect of the hydraulic system

Active Publication Date: 2012-02-08
SAIKESI HYDRAULIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for large displacement plunger pumps, the variable mechanism has a long stroke, so it is difficult to realize electronic closed-loop control

Method used

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  • Position-spring-force feedback type electric proportional variable axial plunger pump
  • Position-spring-force feedback type electric proportional variable axial plunger pump
  • Position-spring-force feedback type electric proportional variable axial plunger pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] The reference signs are: variable plunger pump main body 100, variable mechanism 200, transmission shaft 1, cylinder body 2, swash plate 3, plunger 4, plunger shoe 41, control piston 5, feedback lever 6, feedback spring 7. Valve core 8, valve sleeve 9, precompression spring 10, proportional electromagnet 11, control valve housing 12, feedback spring seat 13, pressure regulating seat 14, return spring 15, housing 16, rear cover 17.

[0019] Such as Figure 1 to Figure 3 As shown, a position-spring-force feedback type electric proportional variable axial piston pump of the present invention includes a variable displacement piston pump body 100 and a variable displacement mechanism 200 installed on one side of the variable displacement piston pump body 100, the variable displacement The plunger pump main body 100 includes a pump casing and...

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Abstract

The invention discloses a position-spring-force feedback type electric proportional variable axial plunger pump. The plunger pump comprises a variable plunger pump body and a variable mechanism arranged on one side of the variable plunger pump body, wherein the variable mechanism comprises a control piston, a feedback rod, a feedback spring, a valve core, a valve bush, a pre-compression spring, aproportional electromagnet and the like; and the body part and the variable mechanism are connected through the feedback rod and the feedback spring. The movement of the valve core is controlled through the change of the current of the proportional electromagnet to allow oil in the control valve to enter big and small cavities of the variable piston and allow the variable piston to move left and right so as to control the movement of a swash plate; and at the same time, the feedback rod arranged on the control piston feeds back to control the displacement of the piston and the feedback springis compressed to transmit a force to the valve core to make the valve core positioned at a new place, so that the delivery volume of the pump and the input signal input into the proportional electromagnet are approximate to a linear proportional relationship. The servo control of electromagnetic force-pump delivery is realized in the form of position-spring-force feedback.

Description

technical field [0001] The invention relates to the technical fields of hydraulic pressure, machinery and electronic control. In particular, it relates to an electric proportional control swash plate axial hydraulic plunger pump, specifically a position-spring-force feedback electric proportional variable axial plunger pump. Background technique [0002] In the pump control system, the variable pump is both the power element and the control element of the system. The performance of the variable pump plays a vital role in the performance of the entire pump control system. How to improve the response speed and accuracy of the variable pump The key to the performance of the system, and the variable pump and its variable mechanism itself is a control system, the performance of this control system has an important impact on the variable pump and its variable mechanism. Variable displacement pumps are divided into four categories according to their control functions: displacement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B1/26
Inventor 吴赛珍高志明
Owner SAIKESI HYDRAULIC TECH CO LTD
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