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Hydraulic power-assisted electric cylinder and control method thereof

A technology of hydraulic power assist and control method, which is applied in the direction of fluid pressure actuating device, etc., to achieve the effects of small heat generation, large force and easy use.

Active Publication Date: 2013-06-12
WUHAN HAILIWEI ELECTROMECHANICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a hydraulic power-assisted electric cylinder and its control method in view of the respective advantages and disadvantages of the electric cylinder and the hydraulic cylinder. The hydraulic joint drives the load, so that it has the characteristics of simple control, high positioning accuracy, high efficiency, and low noise.

Method used

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  • Hydraulic power-assisted electric cylinder and control method thereof
  • Hydraulic power-assisted electric cylinder and control method thereof
  • Hydraulic power-assisted electric cylinder and control method thereof

Examples

Experimental program
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Effect test

Embodiment 2

[0031] Embodiment 2, the pressure regulating device 15 includes a three-position four-way reversing valve 16, a hydraulic pump 17 driven by a hydraulic pump motor 11, and the two output ends of the hydraulic pump 17 are respectively connected to the three-position four-way The P and O ends of the reversing valve are communicated, and the A and B ends of the three-position four-way reversing valve are respectively communicated with the piston rod side oil hole 8 and the piston side oil hole 9 . like Figure 4 , the pressure value is adjusted by the controller 1 controlling the frequency converter 12 to drive the hydraulic pump motor 11 in the pressure regulating device 15 to adjust the hydraulic pressure entering the cylinder in a frequency conversion manner; the hydraulic pump motor 11 Drive the hydraulic pump 17, and connect the two output ends of the hydraulic pump 17 to the P and O ends of a three-position four-way reversing valve 16 located in the pressure regulator 15, an...

Embodiment 3

[0036] Embodiment three, such as Figure 5 , the pressure regulating device 15 includes a three-position four-way reversing valve 16 and a pressure reducing valve 18, the P port of the three-position four-way reversing valve communicates with the A port of the pressure reducing valve 18, and the three-position Ports A and B of the four-way reversing valve communicate with the piston rod side oil hole 8 and the piston side oil hole 9 respectively. like Figure 5 , the pressure value is adjusted by controlling the pressure reducing valve 18 in the pressure regulating device 15 by the controller to adjust the hydraulic pressure entering the cylinder body; the A port of the pressure reducing valve 18 is connected with the pressure regulating device 15 Connect the P port of a three-position four-way reversing valve 16 inside, connect the O port of the three-position four-way reversing valve and the Y port of the pressure reducing valve 18 into the return flow, and connect the pist...

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Abstract

The invention discloses a hydraulic power-assisted electric cylinder and a control method. The electric cylinder comprises a cylinder body, a driving motor, a lead screw, a lead screw nut, a piston, a piston rod and two hydraulic oil holes, wherein the two oil holes in the cylinder body are filled with controlled hydraulic oil as hydraulic power assistance of the electric cylinder. The control method of the hydraulic power-assisted electric cylinder comprises the steps that a controller detects current of the driving motor and adjusts hydraulic pressure entering the cylinder body, so that the current of the driving motor is controlled within a specified range. The adjustment of the hydraulic pressure can adopt variable, frequency conversion, pressure adjustment and other methods. According to the hydraulic power-assisted electric cylinder and the control method, heavy load control can be achieved by using smaller control current under the hydraulic power assistance through controlling the current of the driving motor. The hydraulic power-assisted electric cylinder and the control method are simple and convenient to use, stable and reliable in working, and convenient to use and maintain. The hydraulic power-assisted electric cylinder has output tens of times more than that of an electric cylinder with the same dimension. Due to no valve throttling, compared with a valve-controlled hydraulic cylinder, the efficiency is improved greatly, the calorific value is small, and the noise is low.

Description

technical field [0001] The invention relates to hydraulic control, in particular to a hydraulic power-assisted electric cylinder and a control method thereof. Background technique [0002] The electric cylinder is characterized by high positioning accuracy and convenient control. However, since the electric cylinder relies on the ball screw for transmission, when the load is relatively large, not only the size of the ball screw must be increased, but the working life of the ball screw will be reduced under long-term heavy load. . The characteristic of hydraulic transmission is that it has sufficient force, but its position and speed control are very complicated. At present, hydraulic cylinders mainly use valve control and pump control. Valve control has throttling, large loss and noise; pump control is difficult to achieve control accuracy. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a hydraulic power-assis...

Claims

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Application Information

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IPC IPC(8): F15B15/00F15B15/18
Inventor 邢朔
Owner WUHAN HAILIWEI ELECTROMECHANICAL TECH
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