Permanent magnet bypass reluctance regulated proportional actuator

Abstract

The permanent magnet bypass reluctance regulation type proportional actuator comprises a permanent magnet, a main working magnetic circuit, a bypass magnetic circuit and a reluctance regulation module; the permanent magnet provides a constant magnetic flux source, which 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 circuit; the reluctance regulation module adopts a motor, a steering engine or a piezoelectric material ultrasonic motor; the position of a rotating block is dynamically adjusted through the reluctance regulation module to change the air gap size of the bypass magnetic circuit, change the magnetic resistance of the bypass circuit and realize the shunt control of the total magnetic flux of the permanent magnet, thereby realizing the dynamic proportional control of the actuator. The present application realizes the dynamic proportional regulation of the displacement of the valve core of the actuator, has the characteristics of compact structure, oil seal and energy saving and meets the actuation control of the valve core of the hydraulic valve in the hydraulic system.

Description

Technical Field

[0001] This invention pertains to fluid working system components, specifically relating to a permanent magnet bypass reluctance regulating proportional actuator, which is used in the vehicle manufacturing and engineering equipment manufacturing industries as a continuous operation component for fluid working systems, particularly hydraulic control systems. Background Technology

[0002] In passenger vehicle manufacturing and engineering equipment manufacturing, fluid control systems (especially hydraulic control systems) are crucial for achieving precise positioning, force output, and motion adjustment. They are widely used in core areas such as power steering, braking systems, suspension control, automatic transmission (AT / DCT) shift actuators, and energy execution units in new energy vehicles. However, existing mainstream fluid control components, such as electromagnetic proportional valves, often face inherent challenges when performing continuous, proportional, and high-speed response operations. Traditional electromagnetic coil-driven proportional elements typically achieve proportional control by adjusting the coil current to change the magnetic field strength and drive the valve core displacement. However, this often results in high energy consumption, high heat generation, low sealing reliability, size and weight constraints, and response lag, affecting system energy efficiency, reliability, and spatial layout optimization. Meanwhile, some mechanical adjustment structures struggle to meet the requirements of refined, dynamic, and continuous control. Therefore, there is an urgent need to develop a fluid control actuator that combines high energy efficiency, rapid dynamic response, precise proportional control, and a compact structure to meet the comprehensive requirements of higher performance, lower power consumption, and longer lifespan for fluid control systems in the context of modern intelligent vehicles and autonomous operation of engineering equipment. In particular, the displacement of the valve core of the precise control system components must be satisfied to meet the requirements of dynamic proportional control. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a permanent magnet bypass reluctance-adjustable proportional actuator. Compared with traditional proportional electromagnets, the permanent magnet bypass reluctance-adjustable proportional actuator of this invention achieves dynamic proportional adjustment of the actuator valve core displacement by using a magnetic circuit as the primary driver. It features a compact structure, oil sealing, energy saving and environmental protection, and high reliability, and can meet the valve core actuation control requirements of hydraulic systems.

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

[0005] The present invention discloses a permanent magnet bypass reluctance-adjustable proportional actuator, comprising a permanent magnet (3), a main working magnetic circuit, a bypass magnetic circuit, and a reluctance adjustment module; the permanent magnet (3) provides a constant magnetic flux source, which flows simultaneously to the main working magnetic circuit and the bypass magnetic circuit, and the main working magnetic circuit and the bypass magnetic circuit are connected in parallel to form a magnetic flux distribution circuit. The air gap size of the bypass magnetic circuit is changed by dynamically adjusting the rotary displacement mechanism through the reluctance adjustment module, so as to change the reluctance of the branch and realize the diversion control of the total magnetic flux of the permanent magnet.

[0006] The aforementioned magnetoresistive adjustment module may employ, but is not limited to, a brushless motor, a servo motor, or a piezoelectric ultrasonic motor.

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

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

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

[0010] The telescopic actuator (7) includes 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) have protrusions that restrict the rotational movement of the telescopic actuator (7). The upper magnetic guide shell wall (201) and the lower magnetic guide shell wall (202) have grooves that cooperate with the protrusions that restrict the rotational movement of the telescopic actuator (7).

[0011] The working principle of this invention is as follows:

[0012] 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. The magnetic flux source flows to both the main working magnetic circuit and the bypass magnetic circuit. In the main working magnetic circuit, the magnetic flux passes through the upper magnetic permeable shell wall (201), and after 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 materials, which will generate electromagnetic force to make the telescopic mover (7) move forward. After the magnetic flux flows through the top seat (4), it passes through the lower magnetic permeable block (302) and the upper magnetic permeable shell wall (202) and returns to the permanent magnet (3). In the bypass magnetic circuit, the magnetic flux flows through the bypass magnetic circuit. The rotating block (1) controlled by the magnetic resistance adjustment module rotates to change the size of the air gap and change the magnetic resistance of the bypass magnetic circuit to realize the change of the magnetic flux 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 adjustment module rotates, causing the bypass air gap to increase, 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 adjustment module rotates, causing the bypass magnetic circuit air gap to decrease, its magnetic resistance decreases, the bypass magnetic circuit shunt flux increases, the main working magnetic circuit flux weakens, the electromagnetic force between the telescopic actuator (7) and the top seat (4) decreases, and the telescopic actuator (7) valve core retracts; by changing the size of the air gap through the rotating block (1) controlled by the bypass magnetic circuit magnetic resistance adjustment module, the magnetic flux of the main working magnetic circuit and the bypass magnetic circuit changes, and the change of the main working magnetic circuit flux causes the change of the electromagnetic force to realize the displacement change of the valve core of the permanent magnet bypass magnetic resistance adjustment type proportional actuator.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention discloses a permanent magnet bypass reluctance-adjustable proportional actuator. The actuator system is centered on a reluctance adjustment module. The rotating block driven by the reluctance adjustment module adjusts the air gap size of the bypass magnetic circuit, thereby generating different electromagnetic forces in the main working magnetic circuit. Compared with traditional proportional electromagnet actuators, the permanent magnet bypass reluctance-adjustable proportional actuator features a compact structure, oil sealing, energy saving and environmental protection, and high reliability. It also allows for continuous dynamic proportional adjustment. In terms of hardware, it enables precise flow control of the valve core, meeting the force and position control requirements of the robot's core control components. Attached Figure Description

[0015] Figure 1 This is an exploded view of the structure of a permanent magnet bypass reluctance adjustable proportional actuator according to the present invention.

[0016] Figure 2 This is a cross-sectional view of the permanent magnet bypass reluctance adjustable proportional actuator of the present invention.

[0017] Figure 3 This is a schematic diagram of the actuator bypass magnetic circuit when the magnetic resistance is at its maximum.

[0018] Figure 4 This is a schematic diagram of the actuator bypass magnetic circuit with minimum magnetic resistance in this invention.

[0019] Figure 5 This is a magnetic flux vector diagram showing the minimum magnetic flux in the main working magnetic circuit of the actuator of this invention.

[0020] Figure 6 This is a magnetic flux vector diagram showing the magnetic flux of the main working magnetic circuit of the actuator of the present invention at its maximum.

[0021] In the diagram: 1-Rotating block; 2-Magnetic shielding cylindrical block; 3-Permanent magnet; 4-Top seat; 5-Magnetic shielding ring; 6-Magnetic shielding valve core block; 7-Telescopic mover; 8-Butterfly spring; 101-Magnetic guide upper base; 102-Magnetic guide lower base; 201-Upper magnetic guide shell wall; 202-Lower magnetic guide shell wall; 301-Upper magnetic guide block; 302-Lower magnetic guide block. Detailed Implementation

[0022] To better demonstrate the advantages and innovations of this invention and to clearly illustrate its technical solution, the embodiments of this invention will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1 As shown, a permanent magnet bypass reluctance-adjustable proportional actuator includes a rotating block 1 controlled by a reluctance adjustment module; a permanent magnet 3; a butterfly spring 8; a top seat 4, a magnetic isolation ring 5, a telescopic actuator 7, an upper magnetic guide shell 201, a lower magnetic guide shell 202, a magnetic isolation cylindrical block 2, and a butterfly spring 8 for the main working magnetic circuit; and a magnetic guide upper base 101 and a magnetic guide lower base 102 for the bypass magnetic circuit. The top seat 4, the magnetic isolation ring 5, and the telescopic actuator 7 of the main working magnetic circuit are connected sequentially by bolts. The telescopic actuator 7 is formed by welding the upper magnetic guide block 301, the lower magnetic guide block 302, and the magnetic isolation valve core block 6.

[0025] The rotating block 1 controlled by the magnetic reluctance adjustment module of the bypass magnetic circuit is sandwiched between the upper magnetic guide base 101 and the lower magnetic guide base 102.

[0026] The butterfly spring 8 is installed between the telescopic actuator 7 and the magnetically shielded cylindrical block 2. The center of the butterfly spring 8 is connected to the center of the telescopic actuator 7, and the butterfly spring 8 is fixed in the upper magnetic permeable shell wall 201 and the lower magnetic permeable shell wall 202. The butterfly spring 8 overcomes the initial state electromagnetic force of the main working magnetic circuit.

[0027] The telescopic actuator 7 includes 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 have protrusions that restrict the rotational movement of the telescopic actuator 7. The upper magnetic guide shell wall 201 and the lower magnetic guide shell wall 202 have grooves that cooperate with the protrusions that restrict the rotational movement of the telescopic actuator 7.

[0028] This invention provides a permanent magnet bypass reluctance-adjustable proportional actuator, including a rotating block 1 controlled in a reluctance adjustment module. The rotation angle of the rotating block 1 in the reluctance adjustment module changes to alter the air gap. A permanent magnet 3 provides magnetic flux to the main working magnetic circuit and the bypass magnetic circuit. The main working magnetic circuit includes a top seat 4, a magnetic isolation ring 5, a telescopic actuator 7, an upper magnetic permeable shell 201, a lower magnetic permeable shell 202, a magnetic isolation cylindrical block 2, and a disc spring 8. Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown in Figure 7; the upper magnetic guide base 101 and the lower magnetic guide base 102 of the bypass magnetic circuit; the main working magnetic circuit part top seat 4, the magnetic isolation ring 5 and the telescopic actuator 7 are connected by bolts; the telescopic actuator 7 is composed of an upper magnetic guide block 301, a lower magnetic guide block 302 and a magnetic isolation valve core block 6.

[0029] See 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. The magnetic flux source flows to both the main working magnetic circuit and the bypass magnetic circuit. In the main working magnetic circuit, the magnetic flux passes through the upper magnetic permeable shell 201, and after the magnetic isolation effect of the magnetic isolation ring 5, the magnetic flux flows through the upper magnetic permeable block 301 of the telescopic actuator 7. There is a working air gap between the upper magnetic permeable block 301 and the top seat 4. Both are magnetically conductive materials, which will generate electromagnetic force to move the telescopic actuator 7 forward. After the magnetic flux flows through the top seat 4, it passes through the lower magnetic permeable block 302 and the upper magnetic permeable block 301. The magnetic permeable shell 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 reluctance adjustment module rotates to change the air gap size, thereby changing the magnetic reluctance of the bypass magnetic circuit to achieve the change of magnetic flux in the bypass magnetic circuit; since the permanent magnet 3 provides a constant magnetic flux source, when the rotating block 1 controlled by the magnetic reluctance adjustment module rotates to increase the bypass air gap, its magnetic reluctance increases, the bypass magnetic circuit shunt magnetic flux decreases, and the main working magnetic circuit magnetic flux increases, the electromagnetic force between the telescopic actuator 7 and the top seat 4 increases, and the valve core of the telescopic actuator 7 extends, such as Figure 4 and Figure 5As shown; conversely, when the rotating block 1 controlled by the reluctance adjustment module rotates, reducing the air gap of the bypass magnetic circuit, its reluctance decreases, the bypass magnetic circuit shunt flux increases, and the main working magnetic circuit flux weakens, the electromagnetic force between the telescopic actuator 7 and the top seat 4 decreases, and the valve core of the telescopic actuator 7 retracts; the rotating block 1 controlled by the bypass magnetic circuit reluctance adjustment 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 a change in the magnitude of the electromagnetic force to achieve a change in the displacement of the valve core of the permanent magnet bypass reluctance adjustable proportional actuator, such as Figure 3 and Figure 6 As shown.

[0030] It should be understood that the above description of the preferred embodiments is quite detailed, but it should not be considered as a limitation on the scope of protection of this invention. Those skilled in the art, under the guidance of this invention, can make substitutions or modifications without departing from the scope of protection of the claims of this invention, and all such substitutions or modifications fall within the scope of protection of this invention. The scope of protection of this invention should be determined by the appended claims.

Claims

1. A permanent magnet bypass reluctance-regulated proportional actuator, characterized in that... It includes a permanent magnet (3), a main working magnetic circuit, a bypass magnetic circuit and a magnetic resistance adjustment module; the main working magnetic circuit includes a top seat (4), 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); the bypass magnetic circuit includes a magnetic permeable upper base (101) and a magnetic permeable lower base (102); The main working magnetic circuit's top seat (4), magnetic isolation ring (5), and telescopic actuator (7) are connected in sequence by bolts; the telescopic actuator (7) includes an upper magnetic guide block (301), a lower magnetic guide block (302), and a magnetic isolation valve core block (6), which are connected by welding; The rotating block (1) controlled by the magnetoresistive adjustment module is sandwiched between the upper magnetic base (101) and the lower magnetic base (102); The butterfly spring (8) is installed between the telescopic actuator (7) and the magnetically shielded cylindrical block (2). The center of the butterfly spring (8) is connected to the center of the telescopic actuator (7), and the butterfly spring (8) is fixed in the upper magnetic permeable shell wall (201) and the lower magnetic permeable shell wall (202). The upper magnetic permeable block (301) and the lower magnetic permeable block (302) have protrusions that restrict the rotational movement of the telescopic actuator (7), and the upper magnetic permeable shell wall (201) and the lower magnetic permeable shell wall (202) have grooves that cooperate with the protrusions that restrict the rotational movement of the telescopic actuator (7). The permanent magnet (3) provides a constant magnetic flux source, which flows to both 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 circuit. By dynamically adjusting the rotating block of the magnetic reluctance adjustment module, the air gap size of the bypass magnetic circuit is changed, and the magnetic reluctance of the bypass magnetic circuit is changed, thereby realizing the shunting control of the total magnetic flux of the permanent magnet and realizing the dynamic proportional control of the actuator.

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