High pressure resistant low-inertia direct-operated electro-mechanical conversion device

Abstract

A high pressure resistant low-inertia direct-operated electro-mechanical conversion device comprises yoke steel parts, keeper parts, front end housings and back end housings; a first yoke steel, a second yoke steel, a third yoke steel and a fourth yoke steel are all of half-opening shape and are arranged on an outer ring of the keeper; the openings of the first yoke steel and the second yoke steel are opposite to each other and form a first cavity; a first magnetism isolating ring is positioned in the first cavity; a first control coil circles around the first magnetism isolating ring; the openings of the third yoke steel and the fourth yoke steel are opposite to each other and form a second cavity; a second magnetism isolating ring is positioned in the second cavity; a second control coil circles around the second magnetism isolating ring; a permanent magnet is positioned between the second yoke steel and the third yoke steel; joints between each magnetism isolating ring and each yoke steel, a side wall and the back end housing of the first yoke steel and a side wall and the front end housing of the fourth yoke steel are hermetically connected. The device can be directly connected with a digital valve plug, has good high pressure resistance and adapts to working in wet state.

Description

technical field [0001] The invention belongs to an electric energy-mechanical energy conversion mechanism for an electro-hydraulic digital valve in the field of fluid transmission and control, and in particular relates to a high-voltage-resistant low-inertia direct-acting electric-mechanical converter. Background technique [0002] Electric-mechanical converters for valves can be divided into dry type and wet type according to whether there is oil in the working chamber of the armature. Therefore, it has the advantages of good heat dissipation, small friction, low impact noise when reversing and resetting, stable operation and long life, so it is widely used. [0003] Conventional electro-hydraulic digital valve electric-mechanical converter is a hybrid stepper motor controlled by AC servo mode. There is no sealed high-pressure structure between the control coil and the rotor working chamber. Once the oil enters the working chamber, the control coil It will be directly imme...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing electric-mechanical converter for electro-hydraulic digital valves, such as the unsealed high-pressure-resistant structure, the inability to work in a wet state, and the existence of mechanical conversion links, the present invention provides a device that can be directly connected to the digital valve spool. Good high-voltage resistance characteristics, suitable for high-voltage and low-inertia direct-acting electro-mechanical converters working in wet conditions

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