Multi-flashboard piston type actuator push-pull force test equipment based on magneto-rheological technology

Abstract

A magneto-rheological technology-based push-pull force test device for a multi-gate piston type actuator comprises a shell, a flange connecting seat is arranged in the center of the upper end of the shell, a multi-gate piston type damping device and a control system are arranged in the shell, and a connecting flange is arranged at the upper end of the multi-gate piston type damping device. The multi-gate piston type damping device comprises a corrugated compensation base arranged in the center of the bottom of the shell, a damping shell is arranged at the upper end of the corrugated compensation base, a top plate is arranged at the upper end of the damping shell, and the damping shell and the corrugated compensation base are connected and fixed through a center connecting plate. A central connecting plate through hole is formed in the center of the central connecting plate to communicate the damping shell with the corrugated compensation base, a corrugated pipe with two closed ends is arranged in the corrugated compensation base, a multi-gate-plate piston is arranged in the damping shell, the upper end of the multi-gate-plate piston is fixedly connected with a piston rod and a control system, and the upper end of the piston rod is fixedly connected with a connecting flange; a tension-pressure sensor is arranged between the connecting flange and the piston rod.

Description

Technical Field

[0001] This invention relates to the field of electric actuator testing equipment technology, specifically to a multi-gate piston actuator push-pull force testing equipment based on magnetorheological technology. Background Technology

[0002] Traditional push-pull force testing equipment for electric actuators uses torque conversion or hydraulic devices to provide push-pull damping. Torque conversion provides indirect test data, while pressure-based damping offers low adjustment sensitivity, both affecting the measurement accuracy and efficiency of the equipment. Furthermore, torque conversion requires a torque conversion mechanism to convert torque into push-pull force, while hydraulic devices require a hydraulic station. All of these factors contribute to the complexity, high cost, and large size of traditional electric actuator push-pull force testing equipment. Additionally, the limited range of push-pull damping provided by torque conversion or hydraulic devices, coupled with their inability to adjust, limits the versatility of electric actuator torque testing equipment. Patent document CN 113720519 A discloses a push-pull force testing device for an electric actuator based on magnetorheological technology. In this testing device, the setting of a single piston and a single working gap results in a limited shearing area of ​​the magnetorheological fluid and an uneven magnetic field distribution generated by a single excitation coil (the magnetic field strength of the gap around the piston decays from the center of the coil to both sides), which leads to insufficient precision in the adjustment of the damping force, and the maximum damping range is limited by the upper limit of the shearing force of a single gap. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a push-pull force testing device for multi-gate piston actuators based on magnetorheological technology. This testing device offers higher testing accuracy compared to existing devices and is adaptable to a wider range of testing scenarios.

[0004] The objective of this invention is achieved through the following solution: a multi-gate piston actuator push-pull force testing equipment based on magnetorheological technology, comprising a housing, a flange connection seat at the center of the upper end of the housing, a multi-gate piston damping device and a control system disposed within the housing, a connecting flange at the upper end of the multi-gate piston damping device, the multi-gate piston damping device including a corrugated compensation base disposed at the center of the bottom of the housing, a damping shell disposed at the upper end of the corrugated compensation base, a top plate disposed at the upper end of the damping shell, the damping shell and the corrugated compensation base being connected and fixed by a central connecting plate, a central connecting plate through hole in the center of the central connecting plate communicating with the corrugated compensation base, a double-ended closed corrugated tube disposed within the corrugated compensation base, a multi-gate piston disposed within the damping shell, the upper end of the multi-gate piston being connected and fixed to a piston rod and the control system respectively, the upper end of the piston rod being connected and fixed to the connecting flange, a tension / compression sensor disposed between the connecting flange and the piston rod, and magnetorheological fluid filling the gap between the multi-gate piston and the damping shell and the gap between the corrugated tube and the corrugated compensation base.

[0005] The multi-gate piston includes a conductive connecting plate fixed to the piston rod. Conductive holes are provided on the left and right sides of the conductive connecting plate. A first side gate and a first center gate are provided on the left and right sides of the lower end of the conductive hole on the right side. A first wound magnetic block is provided between the first side gate and the first center gate. A first excitation coil is wound around the outer circumference of the first wound magnetic block. A second side gate and a second center gate are provided on the left and right sides of the lower end of the conductive hole on the left side. A second wound magnetic block is provided between the second side gate and the second center gate. A second excitation coil is wound around the outer circumference of the second wound magnetic block. A first center gate and a second center gate are provided on the upper ends of the first center gate and the second center gate, respectively.

[0006] The gap between the first side gate and the damping shell in the multi-gate piston is the first damping gap, the gap between the first center gate and the second center gate is the second damping gap, and the gap between the second side gate and the damping shell is the third damping gap.

[0007] The control system includes a control box, which is connected to a data acquisition unit, an adjustable DC power supply, an electric actuator power supply, and an electric actuator speed opening regulator. The data acquisition unit and the adjustable DC power supply in the control system are connected to a multi-gate piston.

[0008] The connecting flange has multiple connecting flange holes around its circumference.

[0009] The outer casing includes a circular base at the bottom, an outer cylinder on the upper surface of the circular base, and an upper cover plate on the upper end of the outer cylinder. The central hole of the upper cover plate has the same diameter as the central hole of the flange connection seat, and their centers are located on the same axis.

[0010] The upper circumference of the flange connector is provided with a plurality of first flange connection holes, and the lower circumference of the flange connector is provided with a plurality of second flange connection holes.

[0011] The center of the multi-gate piston, the center hole of the upper cover plate, the center hole of the flange connecting seat, the connecting flange, the bellows, and the center connecting plate through hole are all on the same axis.

[0012] The advantages of this invention are: 1. The design of multiple gates and multiple shear gaps significantly improves the range and uniformity of damping adjustment by increasing the shearing action area and strengthening the magnetic field in synergy with dual excitation coils; 2. The bellows compensation mechanism is specifically designed for volume changes, which can compensate for the chamber volume in real time and flexibly, avoiding pressure fluctuations and improving testing accuracy; 3. The flange bolt connection method adapts to different actuators through standardized flange dimensions, which is simple in structure and has no additional failure points, and has better versatility and reliability; 4. Dual magnetic circuit design (each coil is paired with a dedicated winding magnetic block), the magnetic circuit is more concentrated and the magnetic field loss is small; the dual coils work together to quickly increase the magnetic field strength, the magnetorheological effect response is faster and the testing efficiency is higher; 5. The elastic reset element is eliminated, and contactless volume compensation is achieved through a bellows, eliminating fatigue wear issues and making the compensation process more flexible and adaptable to different test scenarios. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of a multi-gate piston structure; Figure 3 This is a cross-sectional view of a multi-gate piston. Detailed Implementation

[0014] like Figures 1 to 3As shown, a multi-gate piston actuator push-pull force testing device based on magnetorheological technology includes a housing. The housing includes a circular base 1 at the bottom, an outer cylinder 2 on the upper surface of the circular base 1, and an upper cover plate 3 at the upper end of the outer cylinder 2. The central hole 3-1 of the upper cover plate 3 has the same diameter as the central hole 6 of the flange connecting seat, and their centers are located on the same axis. A flange connecting seat 4 is located at the center of the upper end of the housing. The upper circumference of the flange connecting seat 4 is provided with multiple first flange connecting holes 5, and the lower circumference of the flange connecting seat 4 is provided with multiple second flange connecting holes 7. A multi-gate piston damping device 11 and a control system are installed in the housing. A connecting flange 8 is provided at the upper end of the multi-gate piston damping device 11. The multi-gate piston damping device 11 includes a corrugated compensation base 11-14 located at the center of the bottom of the housing. A damping housing 11-18 is provided at the upper end of the corrugated compensation base 11-14. A top plate 11-17 is provided at the upper end of the damping housing 11-18. The damping housing 11-18 and the corrugated compensation base 11-14 are connected and fixed by a central connecting plate 11-12. A central... The connecting plate through-hole 11-12-1 connects the damping housing 11-18 to the corrugated compensation base 11-14. A double-ended closed bellows pipe 11-13 is installed in the corrugated compensation base 11-14. A multi-gate piston 11-0 is installed in the damping housing 11-18. The upper end of the multi-gate piston 11-0 is connected and fixed to the piston rod 11-1 and the control system, respectively. The upper end of the piston rod 11-1 is connected and fixed to the connecting flange 8. Multiple connecting flange holes 9 are provided around the circumference of the connecting flange 8. A tension / compression sensor 10 is installed between the connecting flange 8 and the piston rod 11-1. The gaps between the multi-gate piston 11-0 and the damping housing 11-18, and between the bellows pipe 11-13 and the corrugated compensation base 11-14, are filled with magnetorheological fluid 11-7.

[0015] The multi-gate piston 11-0 includes a conductive connecting plate 11-2 fixedly connected to the piston rod 11-1. Conductive connecting plate through holes 11-2-1 are respectively provided on the left and right sides of the conductive connecting plate 11-2. A first side gate 11-3 and a first center gate 11-6 are respectively provided on the left and right sides of the lower end of the conductive connecting plate through hole 11-2-1 at the right end. A first wound magnetic block 11-5 is provided between the first side gate 11-3 and the first center gate 11-6. A first excitation coil 11- is wound around the outer circumference of the first wound magnetic block 11-5. 4. A second side gate 11-11 and a second center gate 11-8 are respectively provided on the lower left and right sides of the conduction hole 11-2-1 of the conduction connecting plate on the left end. A second winding magnetic block 11-9 is provided between the second side gate 11-11 and the second center gate 11-8. A second excitation coil 11-10 is wound around the outer circumference of the second winding magnetic block 11-9. A first center gate conduction hole 11-3-1 and a second center gate conduction hole 11-8-1 are respectively provided at the upper ends of the first center gate 11-3 and the second center gate 11-8. The gap between the first side gate 11-3 and the damping housing 11-18 in the multi-gate piston 11-0 is the first damping gap 11-15-1; the gap between the first central gate 11-6 and the second central gate 11-8 is the second damping gap 11-15-2; and the gap between the second side gate 11-11 and the damping housing 11-18 is the third damping gap 11-15-3. The control system includes a control box 13, which is connected to a data acquisition unit 14, an adjustable DC power supply 15, an electric actuator power supply 16, and an electric actuator speed opening regulator 17. The data acquisition unit 14 and the adjustable DC power supply 15 in the control system are connected to the excitation coil in the multi-gate piston 11-0. The adjustable DC power supply 15 is also connected to a tension / compression sensor 10. The centers of the multi-gate piston 11-0, the center hole 3-1 of the upper cover plate, the center hole 6 of the flange connecting seat, the connecting flange 8, and the through hole 11-12-1 of the central connecting plate are located on the same axis.

[0016] The working principle of this invention is as follows: The output end of the linear electric actuator installed on the flange connecting seat 4 passes through the central hole 6 and the central hole 3-1 of the upper cover plate and is connected to the connecting flange 8 on the piston rod 11-1 through the connecting flange hole 9. The connecting flange 9 transmits the push and pull force to the piston rod 11-1. The multi-gate shearing mechanism installed on the piston rod 11-1 shears the magnetorheological fluid 11-7 in each damping gap. The first excitation coil 11-4, the first wound magnetic block 11-5, the first side gate 11-3 and the first central gate 11-6 form a magnetic pole. The second excitation coil 11-10, the second wound magnetic block 11-9, the second side gate 11-11 and the second central gate 11-8 form another magnetic pole. The winding makes the two magnetic poles have the same direction. The control box 13 controls the current output of the adjustable DC power supply 15 to the first excitation coil 11-4 and the second excitation coil 11-10, causing changes in the magnetic field magnitude in each damping gap of the magnetorheological fluid. This results in a magnetorheological effect in the fluid within the gaps, hindering the flow of the magnetorheological fluid from the upper cavity to the lower cavity, thus impeding the movement of the multi-gate piston 11-0 and generating a damping force. The output tension and pressure of the tested electric actuator can be obtained through the tension and pressure sensor 10. A corrugated compensation base 11-14 is provided at the bottom of the multi-gate piston damping device 11. A double-ended closed bellows 11-13 is installed inside the corrugated compensation base 11-14. During the movement of the piston rod 11-1, the volume change caused by the movement of the piston rod 11-1 is compensated by the compression change caused by the pressure on the bellows 11-13 through the central connecting plate through-hole 11-12-1 in the center of the central connecting plate 11-12. Figure 1 The arrows indicate the direction of magnetorheological fluid flow under tension, and the direction is opposite under pressure.

[0017] Testing steps: 1. First, connect the electric actuator under test to the flange connection seat 4 with bolts through the first flange connection hole 5. Then connect the electric actuator power supply 16 and the electric actuator speed and opening regulator 17 to the electric actuator under test. 2. Based on the model of the electric actuator being tested, adjust the output current of the adjustable DC power supply 15 through the control box 13 to supply the first excitation coil 11-4 and the second excitation coil 11-10; 3. Based on the model of the tested electric actuator, adjust the speed of the electric actuator through the control box 13 and control the speed of the electric actuator mechanism through the opening regulator 17; 4. The detection data is collected by the data acquisition unit 14 and sent to the control box for analysis and display.

[0018] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A push-pull force testing device for a multi-gate piston actuator based on magnetorheological technology, comprising a housing, a flange connection seat (4) disposed at the center of the upper end of the housing, a multi-gate piston damping device (11) and a control system disposed within the housing, and a connecting flange (8) disposed at the upper end of the multi-gate piston damping device (11), characterized in that... The multi-gate piston damping device (11) includes a corrugated compensation base (11-14) located at the center of the bottom of the outer shell. A damping shell (11-18) is provided at the upper end of the corrugated compensation base (11-14), and a top plate (11-17) is provided at the upper end of the damping shell (11-18). The damping shell (11-18) and the corrugated compensation base (11-14) are connected and fixed by a central connecting plate (11-12). A central connecting plate through hole (11-12-1) is provided in the center of the central connecting plate (11-12) to connect the damping shell (11-18) and the corrugated compensation base (11-14). 4) A double-ended closed bellows (11-13) is provided in the damping housing (11-18), and a multi-gate piston (11-0) is provided in the damping housing (11-18). The upper end of the multi-gate piston (11-0) is connected and fixed to the piston rod (11-1) and the control system respectively. The upper end of the piston rod (11-1) is connected and fixed to the connecting flange (8). A tension and compression sensor (10) is provided between the connecting flange (8) and the piston rod (11-1). The gap between the multi-gate piston (11-0) and the damping housing (11-18) and the gap between the bellows (11-13) and the bellows compensation base (11-14) are filled with magnetorheological fluid (11-7).

2. The push-pull force testing equipment for multi-gate piston actuators based on magnetorheological technology according to claim 1, characterized in that: The multi-gate piston (11-0) includes a conductive connecting plate (11-2) fixedly connected to the piston rod (11-1). Conductive connecting plate through holes (11-2-1) are respectively provided on the left and right sides of the conductive connecting plate (11-2). A first side gate (11-3) and a first center gate (11-6) are respectively provided on the lower left and right sides of the conductive connecting plate through hole (11-2-1) at the right end. A first wound magnetic block (11-5) is provided between the first side gate (11-3) and the first center gate (11-6). A first excitation coil (11-5) is wound around the outer circumference of the first wound magnetic block (11-5). 4) The lower left and right sides of the conduction hole (11-2-1) of the conduction connecting plate on the left end are respectively provided with a second side gate (11-11) and a second center gate (11-8). A second winding magnetic block (11-9) is provided between the second side gate (11-11) and the second center gate (11-8). A second excitation coil (11-10) is wound around the outer circumference of the second winding magnetic block (11-9). The upper ends of the first center gate (11-3) and the second center gate (11-8) are respectively provided with a first center gate conduction hole (11-3-1) and a second center gate conduction hole (11-8-1).

3. The push-pull force testing equipment for multi-gate piston actuators based on magnetorheological technology according to claim 1, characterized in that: The gap between the first side gate (11-3) and the damping shell (11-18) in the multi-gate piston (11-0) is the first damping gap (11-15-1), the gap between the first center gate (11-6) and the second center gate (11-8) is the second damping gap (11-15-2), and the gap between the second side gate (11-11) and the damping shell (11-18) is the third damping gap (11-15-3).

4. The push-pull force testing equipment for multi-gate piston actuators based on magnetorheological technology according to claim 1, characterized in that: The control system includes a control box (13), which is connected to a data acquisition unit (14), an adjustable DC power supply (15), an electric actuator power supply (16), and an electric actuator speed opening regulator (17). The data acquisition unit (14) and the adjustable DC power supply (15) in the control system are connected to a multi-gate piston (11-0).

5. The push-pull force testing equipment for multi-gate piston actuators based on magnetorheological technology according to claim 1, characterized in that: The connecting flange (8) is provided with multiple connecting flange holes (9) around its circumference.

6. The push-pull force testing equipment for multi-gate piston actuators based on magnetorheological technology according to claim 1, characterized in that: The outer shell includes a circular base (1) at the bottom, an outer cylinder (2) on the upper end of the circular base (1), and an upper cover plate (3) on the upper end of the outer cylinder (2). The center hole (3-1) of the upper cover plate (3) has the same diameter as the center hole (6) of the flange connection seat and the center of the circle is located on the same axis.

7. The push-pull force testing equipment for multi-gate piston actuators based on magnetorheological technology according to claim 1, characterized in that: The upper circumference of the flange connecting seat (4) is provided with a plurality of first flange connecting holes (5), and the lower circumference of the flange connecting seat (4) is provided with a plurality of second flange connecting holes (7).

8. The push-pull force testing equipment for multi-gate piston actuators based on magnetorheological technology according to claim 1, characterized in that: The center of the multi-gate piston (11-0) is on the same axis as the center hole of the upper cover plate (3-1), the center hole of the flange connecting seat (6), the connecting flange (8), the bellows (11-13), and the center connecting plate through hole (11-12-1).

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