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Hydraulic control device and control method thereof

A control device and hydraulic technology, applied in the direction of fluid pressure actuating device, servo motor, mechanical equipment, etc., can solve the problems of complex technology, complex debugging, increased cost, etc., to prevent position overshoot, excellent performance, high precision The effect of accurate positioning

Inactive Publication Date: 2012-01-04
江门市蒙德电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this technology uses two sets of devices, the cost is much higher than that of ordinary servo hydraulic drive, and the two sets of devices have linkage requirements for control, which makes the technology and debugging more complicated.

Method used

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  • Hydraulic control device and control method thereof
  • Hydraulic control device and control method thereof
  • Hydraulic control device and control method thereof

Examples

Experimental program
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Effect test

Embodiment

[0021] The principle of the hydraulic control device in the embodiment of the present invention is as follows: figure 1 As shown, it includes a quantitative oil pump 1 and an oil cylinder 3. The outlet of the quantitative oil pump 1 is connected to the oil inlet circuit of the oil cylinder 3, and the oil return circuit of the oil cylinder 3 is connected to the oil tank. The overflow valve 2 of the oil tank 3 is connected in series with a proportional throttle valve 4 as an adjustable liquid resistance on the oil return road of the oil cylinder 3, and the quantitative oil pump 1 is connected with the servo motor 5 that drives it to work.

[0022] In this embodiment, the proportional throttle valve 4 is a servo throttle valve. The aforementioned servo motor 5 is connected to a speed sensor device PG.

[0023] The relationship between the flow rate and pressure of the 3 return oil circuits of the above oil cylinder is as follows:

[0024] Q 1 = nq (1.1)

[0025] Q 2 = Q 1 ...

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Abstract

The invention relates to a hydraulic control device and a control method thereof. The hydraulic control device comprises a quantitative oil pump (1) and an oil cylinder (3), wherein an outlet of the quantitative oil pump (1) is connected with an oil inlet way of the oil cylinder (3) and is also connected in parallel with an overflow valve (2) serving as a safety valve; an oil return way of the oil cylinder (3) is connected with an oil tank; a proportioning throttle valve (4) serving as an adjustable liquid resistor is connected in series on the oil return way of the oil cylinder (3); and the quantitative oil pump (1) is connected with a servo motor (5) for driving the quantitative oil pump to run. In the control method, the through-flow area of the proportioning throttle valve is adjusted automatically according to the change of actual flow in the speed reduction section of position control to ensure that the integral speed reduction section provides constant damping loads, so that the accuracy of the position control is not influenced by actual loads. The hydraulic control device has a simple structure and is low in cost, accurate in positioning, reasonable in design, convenient and practical; and the control method for the hydraulic control device is easy to operate and implement.

Description

technical field [0001] The present invention is a hydraulic control device and its control method, especially a hydraulic control device composed of a servo hydraulic drive device and a set of linked adjustable hydraulic resistance devices, which is used for the position control of an oil cylinder (or piston). The device and its control method belong to the innovative technology of a hydraulic control device and its control method in the technical field of electro-hydraulic hybrid drive. Background technique [0002] Hydraulic technology is an extremely widely used industrial technology, especially suitable for low-speed, heavy-duty mechanical transmission applications. Hydraulic technology can realize linear position control by driving the oil cylinder. Compared with the position control of mechanical direct transmission of servo motor, hydraulic pressure has unparalleled advantages such as large output torque, heavy load bearing, reliability and durability, and its disadva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/02
Inventor 邓之江
Owner 江门市蒙德电气股份有限公司
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