CN-120667432-B - Proportion actuator for permanent magnet bypass magnetic resistance adjustment

CN120667432BCN 120667432 BCN120667432 BCN 120667432BCN-120667432-B

Abstract

A permanent magnet bypass reluctance adjustment type proportional actuator comprises a permanent magnet, a main working magnetic circuit, a bypass magnetic circuit and a reluctance adjustment module, wherein the permanent magnet provides a constant magnetic flux source, the magnetic flux simultaneously flows to the main working magnetic circuit and the bypass magnetic circuit, the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution loop, the reluctance adjustment module dynamically adjusts the position of a rotating block through the reluctance adjustment module to change the size of an air gap of the bypass magnetic circuit, the reluctance of the bypass magnetic circuit is changed, the shunt control of the total magnetic flux of the permanent magnet is realized, and the dynamic proportional control of the actuator is realized. The invention realizes the dynamic proportion adjustment of the displacement of the valve core of the actuator, has the characteristics of compact structure, oil sealing and energy saving, and meets the control of the valve core actuation of the hydraulic valve in the hydraulic system.

Inventors

LU ZHENYU
GUAN DEYI
Jin Luqiao
NING JING
DING RUQI
ZONG HUAIZHI
LIU GUOPING

Assignees

南昌大学

Dates

Publication Date: 20260508
Application Date: 20250804

Claims (1)

1. A permanent magnet bypass magnetic resistance adjusting type proportional actuator is characterized by comprising a permanent magnet (3), a main working magnetic circuit, a bypass magnetic circuit and a magnetic resistance adjusting module, wherein the main working magnetic circuit comprises a top seat (4), a magnetism isolating ring (5), a telescopic rotor (7), an upper magnetism conducting shell wall (201), a lower magnetism conducting shell wall (202), magnetism isolating cylindrical blocks (2) and a belleville spring (8), and the bypass magnetic circuit comprises a magnetism conducting upper base (101) and a magnetism conducting lower base (102); The telescopic rotor (7) comprises an upper magnetic guide block (301), a lower magnetic guide block (302) and a magnetic isolation valve core block (6), wherein the upper magnetic guide block (301), the lower magnetic guide block (302) and the magnetic isolation valve core block (6) are connected through welding; The rotating block (1) controlled by the magnetic resistance adjusting module is clamped between the magnetic conduction upper base (101) and the magnetic conduction lower base (102); The butterfly spring (8) is arranged between the telescopic rotor (7) and the magnetism isolating cylindrical block (2), the center of the butterfly spring (8) is connected with the center of the telescopic rotor (7), and the butterfly spring (8) is fixed in the upper magnetism guiding shell wall (201) and the lower magnetism guiding shell wall (202); The upper magnetic conduction block (301) and the lower magnetic conduction block (302) are provided with convex columns for limiting the rotary motion of the telescopic rotor (7), and the upper magnetic conduction shell wall (201) and the lower magnetic conduction shell wall (202) are provided with grooves matched with the convex columns for limiting the rotary motion of the telescopic rotor (7); The permanent magnet (3) provides a constant magnetic flux source, the magnetic flux source simultaneously flows to the main working magnetic circuit and the bypass magnetic circuit, the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution loop, the size of an air gap of the bypass magnetic circuit is changed by dynamically adjusting the rotating block of the magnetic resistance adjusting module, the magnetic resistance of the bypass magnetic circuit is changed, the shunt control of the total magnetic flux of the permanent magnet is realized, and the dynamic proportion control of the actuator is realized.

Description

Proportion actuator for permanent magnet bypass magnetic resistance adjustment Technical Field The invention belongs to a fluid working system component, in particular to a permanent magnet bypass magnetic resistance adjusting proportional actuator which is applied to continuous operation special elements of a fluid working system, in particular a hydraulic control system, in the fields of vehicle manufacturing and engineering equipment manufacturing industry. Background In the manufacture of passenger cars and engineering equipment, a fluid working system (particularly a hydraulic control system) is a key support for realizing accurate positioning, acting force output and motion adjustment, and is widely applied to the core fields of power steering, braking systems, suspension control, automatic transmission (AT/DCT) gear shifting execution mechanisms, new energy automobiles, energy execution units and the like. However, when the fluid control elements such as the electromagnetic proportional valve and the like in the existing mainstream are used for executing continuous, proportional and high-speed response operation demands, the conventional electromagnetic coil driven proportional element generally changes the magnetic field intensity by adjusting the coil current, and drives the valve core to displace to realize proportional control, but the problems of high energy consumption, large heat productivity, low sealing reliability, volumetric weight constraint, response lag and the like are often accompanied, so that the energy efficiency, the reliability and the space layout optimization of the system are affected. Meanwhile, part of mechanical adjusting structures are difficult to meet the control requirements of fine and dynamic continuous adjustment. Therefore, there is a need to develop a fluid control actuator with high energy efficiency, fast dynamic response, accurate proportional control, and compact structure, so as to adapt to the comprehensive requirements of higher performance, lower power consumption, and longer service life of the fluid control system in the background of intelligent and autonomous operation of engineering equipment of modern automobiles. In particular, the displacement of the valve element of the precise control system element must be satisfied to satisfy the requirement of dynamic proportional control. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a permanent magnet bypass reluctance regulating type proportional actuator. Compared with the traditional proportional electromagnet, the permanent magnet bypass reluctance-adjustable proportional actuator realizes dynamic proportional adjustment of displacement of the valve core of the actuator by leading the magnetic circuit, has the characteristics of compact structure, oil sealing, energy saving, environmental protection, high reliability and the like, and can meet the actuation control of the valve core of the hydraulic valve in a hydraulic system. In order to achieve the above purpose, the present invention adopts the following technical scheme. The permanent magnet bypass reluctance adjustment type proportional actuator comprises a permanent magnet (3), a main working magnetic circuit, a bypass magnetic circuit and a reluctance adjustment module, wherein the permanent magnet (3) provides a constant magnetic flux source, the magnetic flux source simultaneously flows to the main working magnetic circuit and the bypass magnetic circuit, the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution loop, and the reluctance adjustment module dynamically adjusts a rotary displacement mechanism to change the size of an air gap of the bypass magnetic circuit so as to change the reluctance of the bypass magnetic circuit, thereby realizing the shunt control of the total magnetic flux of the permanent magnet. The magnetic resistance adjusting module can adopt ultrasonic motors including, but not limited to, brushless motors, steering engines or piezoelectric materials. The permanent magnet bypass reluctance-adjustable proportional actuator comprises a rotating block (1) controlled by a reluctance-adjustable module, a permanent magnet (3), a belleville spring (8), a top seat (4) of a main working magnetic circuit, a magnetism isolating ring (5), a telescopic rotor (7), an upper magnetism conducting shell wall (201), a lower magnetism conducting shell wall (202), magnetism isolating cylindrical blocks (2) and belleville springs (8), a magnetism conducting upper base (101) and a magnetism conducting lower base (102) of a bypass magnetic circuit, wherein the top seat (4), the magnetism isolating ring (5) and the telescopic rotor (7) are sequentially connected through bolts, and the telescopic rotor (7) is formed by connecting an upper magnetism conducting block (301), a lower magnetism conducting block (302) and a magnetis