An intelligent control energy-saving valve
An intelligent control and energy-saving valve technology, which is applied in the direction of servo motor components, mechanical equipment, fluid pressure actuators, etc., can solve the unavoidable loss of throttling and overflow, the increase of the set pressure of the overflow valve, and the increase of power loss To achieve the effect of improving speed stiffness, easy model, and reducing system energy loss
Inactive Publication Date: 2018-10-30
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
However, by the flow formula It can be seen that the flow through the throttle valve is not only controlled by the opening of the throttle valve, but also when the load changes, the pressure drop acting on the throttle valve will change, and the flow through the throttle valve will change, making the hydraulic cylinder Velocity changes, so its velocity stiffness is low
Although it is also possible to replace the throttle valve with a speed regulating valve to increase the speed stiffness, another problem is that since the speed regulating valve is composed of a pressure reducing valve and a throttle valve in series, the pressure drop during operation is greater than that of the throttle valve. , the setting pressure of the relief valve increases, not only throttling and overflow loss cannot be avoided, but also increases the power loss
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[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0017] As a "supernormal and intelligent" new hydraulic component, the present invention combines mature servo motors with hydraulic valves, without the need to develop special proportional electromagnets and controllers. The energy-saving valve is composed of a proportional relief valve 9 driven by the first servo motor 10, a proportional directional throttle valve 13 driven by the second servo motor 14, a shuttle valve 17, and a pressure sensor 18; among them, the proportional directional throttle valve 13 It consists of a first servo motor 10, a transmission mechanism (such as the first screw nut 12), and a first relief valve 11. The first servo motor 10 replaces the conventional proportional solenoid to control the spool pressure of the first relief valve 11. , can be direct drive or pilot operated. The proportional directional t...
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The invention discloses an intelligent control energy-saving valve, which comprises a proportional overflow valve (9) and a proportional directional throttle valve (13); the proportional overflow valve (9) is mainly composed of a first servo motor (10) connected in sequence, a second An overflow valve (11) and the first screw nut (12) are composed; the proportional directional throttle valve (13) is mainly composed of the second servo motor (14), the second screw nut (15) and the hydraulic valve connected in sequence (16) composition; the proportional relief valve (9) is installed in parallel on the oil circuit between the outlet of the oil pump (2) and the proportional directional throttle valve (13), and the two working oil ports at the outlet of the proportional directional throttle valve (13) A shuttle valve (17) is arranged between them, and a pressure sensor (18) is arranged on the shuttle valve (17). The invention is beneficial to model expansion, shortens the development cycle, improves reliability, and is beneficial to intelligent or digital control.
Description
technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a proportional valve that realizes multi-parameter proportional control and can save energy. Background technique [0002] "China Mechanical Engineering Technology Roadmap" puts forward the concept of "green, intelligent, extraordinary, integration and service", which includes the development direction of the machinery industry in the next 20 years. As a key technical system of mechanical engineering, hydraulic pressure is developed in the direction of "compact, efficient, intelligent (or digital), and reliable. [0003] The hydraulic proportional control system is a system that combines mechanical, hydraulic and electronic control technologies. Able to achieve proportional control of hydraulic system parameters. The key component of the system is the proportional valve. Conventional proportional valves are composed of controllers, proportional solenoids, and hydrauli...
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IPC IPC(8): F15B13/02
CPCF15B13/021
Inventor 吴文海于兰英王国志柯坚
Owner SOUTHWEST JIAOTONG UNIV