Differential type electric-hydraulic proportional uniform-pressure-drop valve

Abstract

The invention relates to a novel structure of a novel differential type electric-hydraulic proportional uniform-pressure-drop valve. The differential type electric-hydraulic proportional uniform-pressure-drop valve comprise a valve core, a valve cavity, a proportion electro-magnet and a valve rod, wherein the valve core is provided with a valve core connecting portion located on the upper end of the valve core, the upper and middle portions of the valve core providing a differential area and the lower portion of the valve core located on the lower end of the valve core; an inlet channel, the valve cavity, an outlet channel or an oil return port channel form a fluid channel; the proportion electro-magnet provides an electromagnetic force to ensure the pressure difference between the inlet and the outlet of the differential type electric-hydraulic proportional uniform-pressure-drop valve to change continuously along with an electric signal; and the valve rod extends in the valve body and moves along the longitudinal axis of the valve rod, and the valve rod is provided with a first end and a second end. The differential type electric-hydraulic proportional uniform-pressure-drop valve provided by the invention is simple in structure and easy to maintain. The electromagnetic force of the proportion electro-magnet is effectively reduced according to the design of the pressure difference structure of the electric-hydraulic proportional uniform-pressure-drop valve, so that the volume of the proportion electro-magnet is reduced and the volume of the whole electric-hydraulic proportional uniform-pressure-drop valve is reduced.

Description

technical field [0001] The invention relates to hydraulic components, more specifically to a new structure of a differential electro-hydraulic proportional differential pressure reducing valve. Background technique [0002] The continuous development of modern industry has put forward higher and higher requirements for hydraulic valves in terms of automation, precision, and response speed. Traditional on-off or fixed-value control hydraulic valves can no longer meet the requirements. Therefore, electro-hydraulic servo valves have been developed. It has the advantages of flexible control, high precision, and good speed, but the cost of electro-hydraulic servo valves is high, and the conditions for application and maintenance are harsh. Electro-hydraulic proportional valves are developed on the basis of electro-hydraulic servo technology. Simple, lower manufacturing and maintenance costs than servo valves, so it is more and more widely used in the field of hydraulic control sy...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a differential electro-hydraulic proportional constant with a new structure in view of the problems of excessive balance force of the relief valve spool caused by high pressure in the hydraulic system and large volume of the proportional electromagnet caused by excessive electromagnetic force. Differential pressure reducing valve to reduce the balance force of the spool, thereby reducing the volume of the electro-hydraulic proportional pressure reducing valve

[0007] Aiming at the problem that the proportional electromagnet thrust of the electro-hydraulic proportional pressure reducing valve is large, the present invention proposes a differential electro-hydraulic proportional differential pressure reducing valve, which can effectively reduce the thrust of the proportional electromagnet

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