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Double-channel plunger flow assignment electro-hydraulic actuator

An actuator and current distribution technology, applied in mechanical equipment, servo meter circuits, fluid pressure actuation devices, etc., can solve the problems of low volumetric efficiency, low-speed operation, instability, etc., and achieve simple and reliable systems and high oil volumetric efficiency. , the effect of high-precision positioning control

Inactive Publication Date: 2015-04-29
CHONGQING CHUANYI AUTOMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been proved that due to the inherent defects of gear pumps: large internal leakage, low volumetric efficiency, high noise, and unstable operation at low speeds, this technology cannot achieve high-precision positioning control, and has not really brought into play the excellent adjustment of servo (stepping) motors. speed performance

Method used

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  • Double-channel plunger flow assignment electro-hydraulic actuator

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Embodiment Construction

[0016] figure 1 It is a schematic diagram of the hydraulic structure of the present invention, as shown in the figure: the dual-channel plunger distribution electro-hydraulic actuator of this embodiment includes a bidirectional pump, a bidirectional oil cylinder 1, a fuel tank 2 and an oil circuit system; the bidirectional pump is provided with a forward rotation The first oil outlet for oil supply and the second oil outlet for reverse oil supply; the oil circuit system includes the first oil circuit 3 communicating with the first oil outlet and the left cavity of the two-way cylinder 1 and the second oil outlet port and the second oil passage 4 of the right chamber of the two-way oil cylinder 1, that is, when the two-way pump is rotating forward, the high-pressure oil is output through the first oil outlet, and when the two-way pump is in reverse, the high-pressure oil is output through the second oil outlet, and through the two-way pump The positive and negative rotation of ...

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Abstract

The invention discloses a double-channel plunger flow assignment electro-hydraulic actuator. The actuator comprises a two-way pump, a two-way oil cylinder, an oil tank and an oil channel system. A forwarding oil supplying first oil outlet and a reversing oil supplying second oil outlet are formed in the two-way pump. The oil channel system comprises a first oil channel communicated with the first oil outlet and a left chamber of the two-way oil cylinder and a second oil channel communicated with the second oil outlet and a right chamber of the two-way oil cylinder. By means of the actuator, two pressure oil is produced through forward and reverse rotation of the two-way pump to be output independently through two channels, and accordingly, the oil cylinder reciprocating is achieved, a traditional solenoid directional valve is not needed, the actuator is simple and reliable, the two-way oil cylinder volume efficiency is high, 'packeted oil' is prevented, oil can be pumped in the low rotation speed, and high-accuracy location control of the pump control system is achieved.

Description

technical field [0001] The invention relates to an electro-hydraulic actuator, in particular to a dual-channel plunger distribution electro-hydraulic actuator. Background technique [0002] Since the 1980s, with the development of traditional hydraulic technology, electro-hydraulic actuators for valves have shown a trend towards miniaturization and integration. In particular, the pump-controlled hydraulic system formed by the "servo (stepping) motor + bidirectional gear pump" represented by American products has realized the requirement of reversing the oil cylinder by relying on the forward and reverse rotation of the motor. This technology eliminates the traditional Electromagnetic reversing valve, the control becomes simple, and the explosion-proof point is reduced a lot. However, the facts have proved that due to the inherent defects of the gear pump: large internal leakage, low volumetric efficiency, high noise, and unstable operation at low speeds, this technology can...

Claims

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Application Information

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IPC IPC(8): F15B11/08
CPCF15B11/15F15B13/0444F15B21/041F15B2211/20515F15B2211/20561
Inventor 李巧向学院
Owner CHONGQING CHUANYI AUTOMATION
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