Seawater hydraulic proportional flow control valve

Abstract

The invention discloses a seawater hydraulic proportional flow control valve with electrical feedback. The valve is controlled by a given flow electrical signal; an upper valve element is directly driven via a proportional electromagnet to perform axial motion; an actual position of a throttle orifice is fed to a control system by a displacement sensor; the control system timely corrects any deviation with a given input value, so that the operation of the flow value is more flexible and convenient, and the control is more accurate and stable. Upper and lower valve elements respectively adopt value body flow guiding and valve element flow guiding structures, so that fluid force received by the valve element is greatly reduced, the cavitation influence is also reduced, and the steady-state performance of the flow valve is improved. A space between the lower valve element and the valve body is sealed by adopting a membrane, on one hand, the problem of sealing between the valve element and a valve sleeve is solved and zero leakage is basically realized; and on the other hand, compared with sealing by a sealing ring, sealing by adopting the membrane has the advantages that the friction of the lower value element is zero in a moving process, the dynamic response of the flow valve is improved greatly and meanwhile, the structure of the flow valve is simplified further.

Description

technical field [0001] The invention is applied to the technical field of hydraulic transmission with seawater or fresh water as the working medium, and relates to a flow control valve used for flow adjustment of a water hydraulic transmission system. Background technique [0002] Water hydraulic transmission technology uses water as the working medium of hydraulic transmission technology. Water instead of mineral oil can effectively avoid a series of serious problems caused by the use of mineral oil, such as flammability and explosion, environmental pollution, maintenance difficulties, and waste liquid treatment difficulties. It has outstanding advantages such as economy, safety and environmental protection, and has a good application prospect in textile, chemical, food, pharmaceutical, fire protection and other industries, so it has attracted the attention of the entire hydraulic industry. [0003] However, compared with mineral oil, water has physical and chemical propert...

AI Technical Summary

Problems solved by technology

In addition, the seal between the lower valve core and the valve body is sealed with a diaphragm, which solves the sealing problem between the valve core and the valve sleeve on the one hand; The friction of the core during the movement is zero, which greatly improves the dynamic response of the flow valve

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