A high-pressure automatic variable control method with hydraulic overload and control valve device

An automatic variable and control method technology, applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve problems such as the inability to ensure effective control of external pilot hydraulic controls

Active Publication Date: 2017-02-22
AVIC LIYUAN HYDRAULIC
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, under complex and unpredictable geological conditions, it is impossible to guarantee that the external pilot liquid control can effectively control the high-pressure automatic control in time, and in the variable process of the high-pressure automatic control, the external pilot liquid that is suddenly applied or changed Controlling pressure yields a fast and stable response

Method used

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  • A high-pressure automatic variable control method with hydraulic overload and control valve device
  • A high-pressure automatic variable control method with hydraulic overload and control valve device
  • A high-pressure automatic variable control method with hydraulic overload and control valve device

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a basis for limiting the present invention.

[0020] Example. A high-pressure automatic variable control method with hydraulic overload, which uses a control spool with a differential area to sense the inlet pressure of the motor to realize automatic high-pressure variable inlet pressure and displacement; and introduces a pilot at the tail end of the spool Hydraulic control pressure to realize hydraulic overload function.

[0021] The control valve device for realizing the above-mentioned high-pressure automatic variable control method with hydraulic overload is constituted as follows: Figure 1-3 As shown, it includes a motor, the inlet and outlet of the motor are respectively connected to the control spool valve 4 through the check valve 2, the control spool valve 4 is provided with a pressure regulating spring 3 and a feedback spring 5, and...

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Abstract

The invention discloses a high-pressure automatic variable control method with hydraulic overload and a control valve device. According to the method, inlet pressure of a motor is sensed by using a control slide valve core with area difference so as to realize automatic high-pressure variables of the inlet pressure and displacement; pilot hydraulic control pressure is introduced into the tail end of the slide valve core to realize a hydraulic overload function; the device comprises the motor; an inlet and an outlet of the motor are connected with a control slide valve (4) through a one-way valve (2) respectively; the control slide valve (4) is provided with a pressure adjusting spring (3) and a feedback spring (5); the feedback spring (5) is connected with a variable cylinder (1); the variable cylinder (1) is also connected with the control slide valve (4). Complex superimposition of high-pressure automatic control and external pilot hydraulic control can be quickly realized under the conditions of complex and unpredictable geological working conditions, so that a host obtains the working efficiency and safety guarantee.

Description

technical field [0001] The invention relates to a control method and device of a bent-axis hydraulic variable motor, in particular to a high-pressure automatic variable control method with hydraulic overload and a control valve device. Background technique [0002] In order to meet the requirements of the working conditions of the rotary drilling rig, the executive motor in its lifting mechanism is usually equipped with a high-pressure automatic variable control mechanism with a pressure adjustment function to change the displacement of the motor. Specifically: when the inlet pressure of the motor increases, The displacement of the motor swings steplessly proportionally from the minimum displacement to the maximum displacement as the pressure increases. When the design of the motor is constant, the starting point of its variable control pressure is the set value. When there is no external pressure oil control, the variable relationship between motor pressure and displacemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 王晋芝陈新雁焦宏轶黄作剑
Owner AVIC LIYUAN HYDRAULIC
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