Fault Tolerant Hydraulic Valve

Abstract

The invention discloses a fault-tolerant hydraulic valve, which includes a main body valve, a servo motor and a linear motor; the main body valve includes a valve body and a valve core, one end of the valve core is connected to the servo motor through a connecting sleeve, and the The other end of the spool is against the linear slider connected to the linear motor; the servo motor, the connecting sleeve, the spool, the linear slider and the linear motor are on the same axis. The spool is provided with a first oil retaining shoulder, a working shoulder, and a second oil retaining shoulder in sequence; the valve body is provided with an oil inlet and an oil outlet, and the inside of the valve body is provided with a communication The oil passage between the oil inlet and the valve core and between the oil outlet and the valve core is connected. The fault-tolerant hydraulic valve is driven by double motors and directly matched with the valve core and body. After the failure of the main drive part, it can continue to complete the hydraulic control function by relying on the fault-tolerant drive part that can still work normally. And with axial and circumferential position detection function.

Description

technical field [0001] The invention belongs to the field of hydraulic control, in particular to a fault-tolerant hydraulic valve. Background technique [0002] The electro-hydraulic valve uses electro-hydraulic technology to realize the conduction, closure, reversing, flow / pressure control and other functions of the oil flow circuit. Among them, the stop valve is mainly used to control the flow and cut-off of the oil circuit in the hydraulic pipeline. The fault-tolerant control of the hydraulic valve is to control the hydraulic actuator to continue to complete its control function by relying on the drive components that can still work normally after some drive components fail. [0003] Existing shut-off valves (take the shut-off valve as an example, including other hydraulic valves that can realize pressure and flow control) mainly include manual control type and electric control type. Among them, the manually controlled globe valve requires manpower to control it, resulti...

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