Proportional actuator for permanent magnet bypass reluctance adjustment

Abstract

A permanent magnet bypass magnetic resistance adjusting type proportional actuator comprises a permanent magnet, a main working magnetic circuit, a bypass magnetic circuit and a magnetic resistance adjusting module. The permanent magnet provides a constant magnetic flux source, and the magnetic flux flows to the main working magnetic circuit and the bypass magnetic circuit at the same time; the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution loop; the magnetic resistance adjusting module adopts a motor, a steering engine or a piezoelectric material ultrasonic motor, the position of the rotating block is dynamically adjusted through the magnetic resistance adjusting module, the air gap size of a bypass magnetic circuit is changed, the magnetic resistance of a branch is changed, shunt control over the permanent magnet total magnetic flux is achieved, and dynamic proportion control over the actuator is achieved. Dynamic proportional adjustment of the displacement of the valve element of the actuator is achieved, the actuator has the advantages of being compact in structure, capable of achieving oil liquid sealing and energy saving, and actuation control over the valve element of a hydraulic valve in a hydraulic system is met.

Description

Technical Field

[0001] The present invention belongs to fluid working system components, specifically to a proportional actuator with permanent magnet bypass reluctance regulation, which is used in the fields of vehicle manufacturing and engineering equipment manufacturing industries for fluid working systems, especially continuous operation special components of hydraulic control systems. Background Art

[0002] In passenger vehicle and engineering equipment manufacturing, fluid working systems (particularly hydraulic control systems) are critical for achieving precise positioning, force output, and motion regulation. They are widely used in core areas such as power steering, braking systems, suspension control, automatic transmission (AT / DCT) shift actuators, and energy actuators for new energy vehicles. However, existing mainstream fluid control components, such as solenoid proportional valves, often face inherent challenges when performing continuous, proportional, and high-speed response operations. Traditional solenoid-driven proportional components typically achieve proportional control by adjusting the coil current to change the magnetic field strength and drive the valve core. However, these components are often accompanied by high energy consumption, high heat generation, low sealing reliability, volume and weight constraints, and response lag, which affect system energy efficiency, reliability, and space optimization. Furthermore, some mechanical adjustment structures struggle to meet the control requirements of refined, dynamic, and continuous regulation. Therefore, there is an urgent need to develop fluid control actuators that combine high energy efficiency, fast dynamic response, precise proportional control, and a compact structure to meet the comprehensive requirements of higher performance, lower power consumption, and longer life for fluid control systems in the context of modern intelligent vehicles and autonomous engineering equipment. In particular, the displacement of the valve core of the system component must be accurately controlled to meet the requirements of dynamic proportional control. Summary of the Invention

[0003] The present invention aims to address the shortcomings of existing technologies by providing a permanent magnet bypass reluctance-adjustable proportional actuator. Compared to conventional proportional solenoids, the permanent magnet bypass reluctance-adjustable proportional actuator described herein utilizes a magnetic circuit to achieve dynamic proportional adjustment of the actuator valve spool displacement. It features a compact structure, is oil-tight, energy-efficient and environmentally friendly, and offers high reliability, meeting the requirements for controlling hydraulic valve spool actuation in hydraulic systems.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions.

[0005] The present invention discloses a permanent magnet bypass reluctance regulation type proportional actuator, comprising a permanent magnet (3), a main working magnetic circuit, a bypass magnetic circuit and a reluctance regulation module; the permanent magnet (3) provides a constant magnetic flux source, the magnetic flux source flows to the main working magnetic circuit and the bypass magnetic circuit at the same time, the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution circuit, and the reluctance regulation module dynamically adjusts the rotary displacement mechanism to change the air gap size of the bypass magnetic circuit, thereby changing the reluctance of the branch circuit and realizing the shunt control of the total magnetic flux of the permanent magnet.

[0006] The magnetic resistance adjustment module may be a brushless motor, a steering gear or a piezoelectric ultrasonic motor, but is not limited to the brushless motor.

[0007] More specifically, the present invention provides a permanent magnet bypass reluctance regulation type proportional actuator, comprising a rotating block (1) controlled by a reluctance regulation module; a permanent magnet (3); a butterfly spring (8); a top seat (4), a magnetic isolation ring (5), a telescopic mover (7), an upper magnetic permeability shell wall (201), a lower magnetic permeability shell wall (202), a magnetic isolation cylindrical block (2) and a butterfly spring (8) of a main working magnetic circuit; a magnetic permeability upper base (101) and a magnetic permeability lower base (102) of a bypass magnetic circuit; the top seat (4), the magnetic isolation ring (5) and the telescopic mover (7) of the main working magnetic circuit portion are connected in sequence by bolts; and the telescopic mover (7) is connected by welding the upper magnetic permeability block (301), the lower magnetic permeability block (302) and the magnetic isolation valve core block (6).

[0008] The rotating block (1) controlled by the magnetic resistance adjustment module of the bypass magnetic circuit is clamped between the upper magnetic guide base (101) and the lower magnetic guide base (102).

[0009] The butterfly spring (8) is installed between the telescopic mover (7) and the magnetic isolation cylindrical block (2), the center of the butterfly spring (8) is connected to the center of the telescopic mover (7), and the butterfly spring (8) is fixed between the upper magnetic conductive shell wall (201) and the lower magnetic conductive shell wall (202).

[0010] The telescopic mover (7) comprises an upper magnetic guide block (301), a lower magnetic guide block (302) and a magnetic isolation valve core block (6); the upper magnetic guide block (301) and the lower magnetic guide block (302) are provided with convex columns for limiting the rotational movement of the telescopic mover (7); the upper magnetic guide shell wall (201) and the lower magnetic guide shell wall (202) are provided with grooves that match the convex columns for limiting the rotational movement of the telescopic mover (7).

[0011] The working principle of the present invention is as follows: The permanent magnet (3) provides a constant magnetic flux source, and the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution circuit. The magnetic flux source flows to the main working magnetic circuit and the bypass magnetic circuit at the same time. In the main working magnetic circuit, the magnetic flux passes through the upper magnetic permeability shell wall (201), and after the magnetic isolation effect of the magnetic isolation ring (5), the magnetic flux flows through the upper magnetic permeability block (301) of the telescopic mover (7). There is a working air gap between the upper magnetic permeability block (301) and the top seat (4). Both are magnetic conductive materials, which will generate electromagnetic force to move the telescopic mover (7) forward. After flowing through the top seat (4), the magnetic flux passes through the lower magnetic permeability block (302) and the upper magnetic permeability shell wall (202) and returns to the permanent magnet (3); in the bypass magnetic circuit, the magnetic flux flows through the bypass magnetic circuit, and the rotating block (1) controlled by the magnetic resistance adjustment module rotates to change the size of the air gap, changing the magnetic resistance of the bypass magnetic circuit to achieve the magnetic flux change of the bypass magnetic circuit; since the permanent magnet (3) provides a constant magnetic flux When the rotating block (1) controlled by the magnetic resistance regulating module rotates to increase the bypass air gap, its magnetic resistance increases, the bypass magnetic circuit shunt flux decreases, the main working magnetic circuit flux increases, the electromagnetic force between the telescopic actuator (7) and the top seat (4) increases, and the telescopic actuator (7) valve core extends; conversely, when the rotating block (1) controlled by the magnetic resistance regulating module rotates to reduce the bypass magnetic circuit air gap, its magnetic resistance decreases, the bypass magnetic circuit shunt flux increases, the main working magnetic circuit flux decreases, the electromagnetic force between the telescopic actuator (7) and the top seat (4) decreases, and the telescopic actuator (7) valve core retracts; the rotating block (1) controlled by the bypass magnetic circuit magnetic resistance regulating module changes the size of the air gap to achieve a change in the magnetic flux of the main working magnetic circuit and the bypass magnetic circuit, and the change in the main working magnetic circuit flux causes the size of the electromagnetic force to change to achieve a displacement change of the valve core of the permanent magnet bypass magnetic resistance regulating proportional actuator.

[0012] Compared with the prior art, the present invention has the following beneficial effects.

[0013] The present invention discloses a permanent magnet bypass reluctance-adjustable proportional actuator. The actuator system, with a reluctance adjustment module at its core, uses a rotating block driven by the reluctance adjustment module to adjust the air gap in the bypass magnetic circuit, generating varying electromagnetic forces in the main working magnetic circuit. Compared to traditional proportional electromagnetic actuators, this permanent magnet bypass reluctance-adjustable proportional actuator offers a compact structure, oil-sealed design, energy conservation and environmental protection, and high reliability. It also enables continuous dynamic proportional adjustment. The hardware allows for precise flow control of the spool control valve, meeting the requirements of the robot's core control components for actuator force and position control. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural explosion diagram of a permanent magnet bypass reluctance regulation proportional actuator of the present invention.

[0015] Figure 2 This is a cross-sectional view of the structure of the permanent magnet bypass reluctance regulation proportional actuator of the present invention.

[0016] Figure 3 This is a schematic diagram of the actuator bypass magnetic circuit when the magnetic resistance is maximum.

[0017] Figure 4 This is a schematic diagram of the actuator bypass magnetic circuit when the magnetic resistance is minimum.

[0018] Figure 5 This is the magnetic flux vector diagram when the magnetic flux of the main working magnetic circuit of the actuator of the present invention is minimum.

[0019] Figure 6 This is the magnetic flux vector diagram when the magnetic flux of the main working magnetic circuit of the actuator of the present invention is maximum.

[0020] In the figure: 1-rotating block; 2-magnetic isolation cylindrical block; 3-permanent magnet; 4-top seat; 5-magnetic isolation ring; 6-magnetic isolation valve core block; 7-telescopic mover; 8-butterfly spring; 101-magnetic permeability upper base; 102-magnetic permeability lower base; 201-upper magnetic permeability shell wall; 202-lower magnetic permeability shell wall; 301-upper magnetic permeability block; 302-lower magnetic permeability block. DETAILED DESCRIPTION

[0021] In order to better reflect the advantages and innovations of the present invention and clearly demonstrate the technical solutions of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Example

[0022] like Figure 1 As shown, a permanent magnet bypass reluctance regulation type proportional actuator includes a rotating block 1 controlled by a reluctance regulation module; a permanent magnet 3; a butterfly spring 8; a top seat 4, a magnetic isolation ring 5, a telescopic mover 7, an upper magnetic permeability shell wall 201, a lower magnetic permeability shell wall 202, a magnetic isolation cylindrical block 2 and a butterfly spring 8 of the main working magnetic circuit; a magnetic permeability upper base 101 and a magnetic permeability lower base 102 of the bypass magnetic circuit; the top seat 4 of the main working magnetic circuit part, the magnetic isolation ring 5 and the telescopic mover 7 are connected in sequence by bolts; the telescopic mover 7 is connected by an upper magnetic permeability block 301, a lower magnetic permeability block 302 and a magnetic isolation valve core block 6 by welding.

[0023] The rotating block 1 controlled by the magnetic resistance adjustment module of the bypass magnetic circuit is sandwiched between the upper magnetic guide base 101 and the lower magnetic guide base 102 .

[0024] The butterfly spring 8 is installed between the telescopic mover 7 and the magnetic isolation cylindrical block 2. The center of the butterfly spring 8 is connected to the center of the telescopic mover 7, and the butterfly spring 8 is fixed between the upper magnetic permeable shell wall 201 and the lower magnetic permeable shell wall 202. The butterfly spring 8 overcomes the initial electromagnetic force of the main working magnetic circuit.

[0025] The telescopic mover 7 includes an upper magnetic conductive block 301, a lower magnetic conductive block 302 and a magnetic isolation valve core block 6. The upper magnetic conductive block 301 and the lower magnetic conductive block 302 are provided with protrusions that limit the rotational movement of the telescopic mover 7. The upper magnetic conductive shell wall 201 and the lower magnetic conductive shell wall 202 are provided with grooves that cooperate with the protrusions that limit the rotational movement of the telescopic mover 7.

[0026] The present invention provides a permanent magnet bypass reluctance regulation type proportional actuator, comprising a rotating block 1 controlled by a reluctance regulation module, wherein the rotating block 1 of the reluctance regulation module rotates at a varying angle to achieve the purpose of changing the air gap; a permanent magnet 3 provides magnetic flux for the main working magnetic circuit and the bypass magnetic circuit; a top seat 4 of the main working magnetic circuit, a magnetic isolation ring 5, a telescopic mover 7, an upper magnetic permeable shell wall 201, a lower magnetic permeable shell wall 202, a magnetic isolation cylindrical block 2 and a butterfly spring 8, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown; the magnetic guide upper base 101 and the magnetic guide lower base 102 of the bypass magnetic circuit; the top seat 4 of the main working magnetic circuit part, the magnetic isolation ring 5 and the telescopic mover 7 are connected by bolts; the telescopic mover 7 is composed of an upper magnetic guide block 301, a lower magnetic guide block 302 and a magnetic isolation valve core block 6.

[0027] See also Figure 1 and Figure 2 , the permanent magnet 3 provides a constant magnetic flux source, the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution circuit, and the magnetic flux source flows to the main working magnetic circuit and the bypass magnetic circuit at the same time. In the main working magnetic circuit, the magnetic flux passes through the upper magnetic permeable shell wall 201, and through the magnetic isolation effect of the magnetic isolation ring 5, the magnetic flux flows through the upper magnetic permeable block 301 of the telescopic mover 7. There is a working air gap between the upper magnetic permeable block 301 and the top seat 4. Both are magnetic conductive materials, which will generate electromagnetic force to move the telescopic mover 7 forward. After flowing through the top seat 4, the magnetic flux passes through the lower magnetic permeable block 302 and the upper The magnetic permeability shell wall 202 returns to the permanent magnet 3; in the bypass magnetic circuit, the magnetic flux flows through the bypass magnetic circuit, and the rotating block 1 controlled by the magnetic resistance adjustment module rotates to change the size of the air gap, changing the magnetic resistance of the bypass magnetic circuit to achieve the change of the magnetic flux of the bypass magnetic circuit; because the permanent magnet 3 provides a constant magnetic flux source, when the rotating block 1 controlled by the magnetic resistance adjustment module rotates to increase the bypass air gap, its magnetic resistance increases, the bypass magnetic circuit shunt flux decreases, and the main working magnetic circuit flux is enhanced, the electromagnetic force between the telescopic mover 7 and the top seat 4 increases, and the valve core of the telescopic mover 7 extends, as shown in FIG. Figure 4 and Figure 5As shown; on the contrary, when the rotating block 1 controlled by the magnetic resistance regulating module rotates to reduce the bypass magnetic circuit air gap, its magnetic resistance decreases, the bypass magnetic circuit shunt flux increases, the main working magnetic circuit flux weakens, the electromagnetic force between the telescopic mover 7 and the top seat 4 decreases, and the valve core of the telescopic mover 7 retracts; the rotating block 1 controlled by the bypass magnetic circuit magnetic resistance regulating module changes the size of the air gap to achieve a change in the magnetic flux of the main working magnetic circuit and the bypass magnetic circuit. The change in the magnetic flux of the main working magnetic circuit causes the size of the electromagnetic force to change to achieve a displacement change of the valve core of the permanent magnet bypass magnetic resistance regulating proportional actuator, as shown Figure 3 and Figure 6 shown.

[0028] It should be understood that the above description of the preferred embodiment is relatively detailed and cannot be regarded as limiting the scope of protection of the patent of the present invention. Under the guidance of the present invention, ordinary technicians in this field can also make substitutions or modifications without departing from the scope of protection of the claims of the present invention, which all fall within the scope of protection of the present invention. The scope of protection requested by the present invention shall be based on the attached claims.

Claims

1. A permanent magnet bypass reluctance regulation proportional actuator, characterized by The invention comprises a permanent magnet (3), a main working magnetic circuit, a bypass magnetic circuit and a magnetic resistance adjustment module; the permanent magnet (3) provides a constant magnetic flux source, the magnetic flux source flows to the main working magnetic circuit and the bypass magnetic circuit at the same time, the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution circuit, and the magnetic resistance adjustment module dynamically adjusts the rotary displacement mechanism to change the air gap size of the bypass magnetic circuit, changes the magnetic resistance of the branch, realizes the shunt control of the total magnetic flux of the permanent magnet, and realizes the dynamic proportional control of the actuator.

2. A permanent magnet bypass reluctance regulation proportional actuator, characterized by The invention comprises a rotating block (1) controlled by a magnetic resistance regulating module; a permanent magnet (3); a butterfly spring (8); a top seat (4), a magnetic isolation ring (5), a telescopic mover (7), an upper magnetic permeability shell wall (201), a lower magnetic permeability shell wall (202), a magnetic isolation cylindrical block (2) and a butterfly spring (8) of a main working magnetic circuit; a magnetic permeability upper base (101) and a magnetic permeability lower base (102) of a bypass magnetic circuit; the top seat (4), the magnetic isolation ring (5) and the telescopic mover (7) of the main working magnetic circuit part are connected in sequence by bolts; the telescopic mover (7) is connected by an upper magnetic permeability block (301), a lower magnetic permeability block (302) and a magnetic isolation valve core block (6) by welding; The rotating block (1) controlled by the magnetic resistance adjustment module of the bypass magnetic circuit is sandwiched between the upper magnetic guide base (101) and the lower magnetic guide base (102); The butterfly spring (8) is installed between the telescopic mover (7) and the magnetic isolation cylindrical block (2), the center of the butterfly spring (8) is connected to the center of the telescopic mover (7), and the butterfly spring (8) is fixed between the upper magnetic conductive shell wall (201) and the lower magnetic conductive shell wall (202); The telescopic mover (7) comprises an upper magnetic guide block (301), a lower magnetic guide block (302) and a magnetic isolation valve core block (6); the upper magnetic guide block (301) and the lower magnetic guide block (302) are provided with convex columns for limiting the rotational movement of the telescopic mover (7); the upper magnetic guide shell wall (201) and the lower magnetic guide shell wall (202) are provided with grooves that match the convex columns for limiting the rotational movement of the telescopic mover (7).

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