Rotary valve core switching mechanism based on cross limiting port

Abstract

The invention discloses a rotary valve core switching mechanism based on a cross limiting port. The rotary valve core switching mechanism comprises a valve core body and a limiting sleeve, and the outside surface of the right end of the valve core body is fixedly connected with limiting shoulders; one side of each limiting shoulder is provided with a first arc incision, a second arc incision, an annular plane incision and a cross limiting incision separately; and the outside surfaces of other shoulders are provided with radial arc incisions. The invention relates to the technical field of hydraulic valves. According to the rotary valve core switching mechanism based on the cross limiting port, the purpose of enabling the hydraulic valve to work in an excitation mode and a proportional reversing mode is achieved properly, and the operating requirements of a complex hydraulic system with the requirements for proportional reversing and excitation as well as a certain control accuracy and dynamic characteristic are met properly; and through improvement of a hydraulic valve core switching mechanism, people can further control the proportion of hydraulic media for reversing operation properly while regulating the vibration frequency and vibration amplitude of the hydraulic valve conveniently.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a rotary valve core switching mechanism based on a cross limit port. Background technique [0002] The hydraulic valve is an automatic component operated by pressure oil. It is controlled by the pressure oil of the pressure distribution valve. It is usually used in combination with an electromagnetic pressure distribution valve. It can be used to remotely control the on-off of oil, gas, and water pipeline systems in hydropower stations. Clamping, control, lubrication and other oil circuits are divided into direct-acting type and pilot-operated type. The multi-purpose pilot type can be divided into manual, electric control and hydraulic control according to the control method. It is used to control the pressure, flow and direction of the liquid in hydraulic transmission. Among them, those that control pressure are called pressure control valves, those that control flow ar...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a rotary spool switching mechanism based on the cross limit port, which solves the problem that the existing spool rotary directional valve cannot set the zero position, that is, the reversing neutral position. It cannot realize proportional commutation control, and cannot meet the use requirements of some complex hydraulic systems that require both proportional commutation and vibration, and have certain control accuracy and dynamic characteristics requirements. Therefore, its application range has certain limitations and cannot be realized through Improve the switching mechanism of the hydraulic valve core to facilitate people to adjust the vibration frequency and vibration amplitude of the hydraulic valve. The control accuracy is not high, and it is impossible to better control the proportion of the hydraulic medium for the purpose of commutation.

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