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Differential circuit of high-flow hydraulic system and control method thereof

A technology of hydraulic system and control method, which is applied in the direction of fluid pressure actuator, servo meter circuit, servo motor, etc., to achieve the effect of differential function

Active Publication Date: 2018-09-04
NANTONG RAINBOW HEAVY MACHINERIES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the differential method is currently only suitable for small flow hydraulic systems

Method used

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  • Differential circuit of high-flow hydraulic system and control method thereof
  • Differential circuit of high-flow hydraulic system and control method thereof
  • Differential circuit of high-flow hydraulic system and control method thereof

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0025] As shown in the figure, a differential circuit of a large-flow hydraulic system of the present invention includes an oil cylinder 1, an electro-hydraulic proportional control valve 2, a first differential control valve and a second differential control valve, and the electro-hydraulic proportional control valve 2 The external control port k is connected to the pilot control oil source, the external control port x of the electro-hydraulic proportional control valve 2 is connected to the oil tank, the first differential control valve includes the first solenoid valve 3, the first cartridge valve 4 and the OR gate shuttle valve 5, The second differential control valve includes a second solenoid valve 6, a second ...

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Abstract

The invention discloses a differential circuit of a high-flow hydraulic system and a control method of the differential circuit. The differential circuit comprises an oil cylinder, an electric-hydraulic proportional control valve, a first differential control valve and a second differential control valve. An external control opening k of the electric-hydraulic proportional control valve is connected with a pilot control oil source, and an external control opening x of the electric-hydraulic proportional control valve is connected with an oil tank. The first differential control valve comprisesa first solenoid valve, a first cartridge valve and an or gate shuttle valve. The second differential control valve comprises a second solenoid valve, a second cartridge valve and a deceleration valve. According to the differential circuit of the high-flow hydraulic system and the control method of the differential circuit, a hydraulic main oil circuit and a control network are formed through selection and usage of a series of standard serial valve blocks according to the stretching hydraulic principle of a differential oil cylinder, and the function of differential motion of the oil cylinderunder the condition of the high flow is fulfilled.

Description

technical field [0001] The invention relates to a differential circuit and a control method thereof, in particular to a differential circuit of a large-flow hydraulic system and a control method thereof. Background technique [0002] Large-flow hydraulic systems generally appear in ship machinery and machine tool equipment. When the high-speed motion of the actuator is required, it is necessary to increase the system configuration, increase the system flow, and increase the power consumption of the system to increase the motion speed of the actuator. But the cost of the whole set of equipment will increase like this, and the equipment will also be more complicated. [0003] The hydraulic system of the bolt-type wind power installation ship's lifting mechanism is a large-flow hydraulic system. The system pressure is not high when laying piles, but the movement speed of the oil cylinder is required to be fast. At slow speed, the flow rate of the hydraulic system has reached ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/024F15B11/08F15B13/044
CPCF15B11/024F15B11/08F15B13/0401F15B13/044F15B2211/253F15B2211/515Y02E10/20
Inventor 辛少云高剑钊何涛
Owner NANTONG RAINBOW HEAVY MACHINERIES
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