Electro-hydraulic proportional valve

Abstract

The invention provides an electro-hydraulic proportional valve, belonging to the technical field of hydraulic transmission, comprising a valve body, a valve core, a connecting block, a casing, a moving coil, a circuit board and a reset mechanism; the valve core is slidably arranged in the valve body; the connecting block is fixedly arranged On one end of the valve body; there is an installation space on the connecting block; the outer shell is fixed on the end of the connecting block away from the valve body; the outer shell is equipped with a magnet; the moving coil is slidingly set in the outer shell and sleeved on the outside of the magnet; One end is provided with a fixed terminal extending into the installation space and fixedly connected with the valve core; the circuit board is provided with a protruding part protruding from one side of the shell, and the reset mechanism is fixed on the other end of the valve body, and is connected with the valve core. Elastic connection, the electro-hydraulic proportional valve provided by the present invention adjusts the valve core to slide to zero in the valve body by starting the reset mechanism, and the elastic connection between the reset mechanism and the valve core will not affect the normal movement of the valve core in the valve body, eliminating Errors generated during the manufacturing and assembly process improve the control accuracy of the electro-hydraulic proportional valve.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transmission, and more specifically relates to an electro-hydraulic proportional valve. Background technique [0002] The electro-hydraulic proportional valve has strong anti-pollution ability and low price, and has gradually replaced the application of servo valves in industrial production. Shifting, resulting in greatly reduced accuracy and other characteristics of the electro-hydraulic proportional valve, serious production accidents will occur. Contents of the invention [0003] The purpose of the present invention is to provide an electro-hydraulic proportional valve to solve the technical problem existing in the prior art that the zero position of the spool shifts due to errors in installation and manufacturing, resulting in a decrease in the accuracy of the electro-hydraulic proportional valve. [0004] In order to achieve the above object, the technical solution adopted by the present...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an electro-hydraulic proportional valve to solve the technical problem in the prior art that the zero position of the spool shifts due to errors in installation and manufacturing, resulting in a decrease in the accuracy of the electro-hydraulic proportional valve.

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