Impulse type micro-adjustment oil supply device

Abstract

The invention belongs to the field of equipment for accurately positioning hydraulic executive components, and particularly discloses an impulse type micro-adjustment oil supply device. The impulse type micro-adjustment oil supply device comprises a volume oil cylinder and a direction valve for controlling the piston of the volume oil cylinder to reciprocate; the direction valve is provided with four oil ports P, T, A and B and two switching positions; the oil ports A and B are respectively connected with a left oil cavity and a right oil cavity or the right oil cavity and the left oil cavity of the volume oil cylinder; one of the oil port P and T is used for being communicated with a pressure oil source, and the other is connected with a main oil control valve of a hydraulic executive component or a pressure inlet oil circuit of an oil line. The impulse type micro-adjustment oil supply device can generate impulse type fixed-volume micro pressure oil to the hydraulic executive component to enable the hydraulic executive component to generate continuously controlled micro movement, so that an accurate positioning effect is achieved. The impulse type micro-adjustment oil supply device is simple in structure, a common hydraulic component is skillfully applied, and the impulse type micro-adjustment oil supply device has the characteristics of low cost and simple implementation and is convenient to popularize and apply.

Description

technical field [0001] The invention belongs to the field of hydraulic control, and in particular relates to a hydraulic circuit and a device for controlling the precise positioning of a hydraulic actuator. Background technique [0002] At present, during the movement of hydraulic actuators, sometimes it is necessary to accurately position a certain midway position in the movement process. In the prior art, in order to achieve this goal, a closed-loop system is usually formed by using a servo valve and position feedback. However, this method is expensive because the servo valve is expensive, and because the servo valve is a high-precision hydraulic component, it needs to be equipped with a special electronic control unit and filter during use, so that the overall manufacturing cost is very high and the structure is relatively complicated. These all limit its share in practical applications, and the number of users is limited; in addition, through the combination of several o...

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Problems solved by technology

[0002] At present, during the movement of hydraulic actuators, sometimes it is necessary to accurately position a certain midway position in the movement process. In the prior art, in order to achieve this goal, a closed-loop system is usually formed by using a servo valve and position feedback. However, this method is expensive because the servo valve is expensive, and because the servo valve is a high-precision hydraulic component, it needs to be equipped with a special electronic control unit and filter during use, so that the overall manufacturing cost is very high and the structure is relatively complicated. These all limit its share in practical applications, and the number of users is limited; in addition, through the combination of several oil cylinders, combined with each oil cylinder's own start and stop travel limit, so as to achieve the purpose of positioning in several inherent positions, Its defect is that it can only be positioned at a few specific positions. At the same time, the combination of multiple oil cylinders also makes the mechanical structure more complicated. In practical applications, it will also be limited by the shape of related matching parts, which will affect the overall layout.

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