Self-powered magnetorheological damper system

Abstract

The utility model discloses a self-powered magnetorheological damper system. In the working process, the end cover, the left piston rod and the right piston rod do reciprocating linear motion relative to the damper cylinder body, the spring I fixed to the end cover and the spring II fixed to the supporting rod deform, the piezoelectric device is pressed through elastic force generated by deformation of the spring I and the spring II, and therefore alternating voltage is generated; the generated alternating voltage can be transmitted to the energy processing device through a lead, and the energy processing device is composed of a full-bridge rectification filter circuit and can convert the alternating voltage into direct current suitable for the magneto-rheological damper, so that power is supplied to the magneto-rheological damper.

Description

Technical Field

[0001] This utility model relates to a magnetorheological damper system, and more particularly to a self-powered magnetorheological damper system. Background Technology

[0002] Magnetorheological dampers are a new type of intelligent damping device that uses magnetorheological fluid as the working medium. Based on the magnetorheological effect, magnetorheological dampers have advantages such as simple structure, small size, low energy consumption, and fast response. Due to their adjustable damping characteristics, they are widely used in vibration control fields such as automobiles, shock absorbers, and prosthetics.

[0003] In practical operation, magnetorheological dampers require an external power supply to input direct current, thereby generating a magnetic field to alter the rheological properties of the magnetorheological fluid and output different damping forces. However, the addition of an external power supply not only complicates the system but also increases application costs. Furthermore, current self-powered devices generate alternating current, which cannot directly power the magnetorheological damper, thus significantly limiting its application and promotion.

[0004] Based on this, this utility model proposes a self-powered electromagnetic rheodynamic damper system, which has the advantages of integrating three functions: controllable damping force output, energy self-collection, and energy self-processing. Summary of the Invention

[0005] To overcome the problems existing in the background technology, this utility model proposes a self-powered magnetorheological damper system. When the end cap, left piston rod, and right piston rod move relative to the damper cylinder, spring I fixed to the end cap and spring II fixed to the support rod deform. The elastic force generated by the deformation of spring I and spring II compresses the piezoelectric element, thereby generating an alternating voltage. The generated alternating voltage can be transmitted to an energy processing device through leads. The energy processing device consists of a full-bridge rectifier and filter circuit, which can convert the alternating voltage into DC power suitable for the magnetorheological damper, thereby powering the magnetorheological damper.

[0006] The technical solution adopted by this utility model to solve its technical problem includes: an end cover (1), a left piston rod (2), an energy processing device (3), a left cylinder head (4), a damper cylinder body (5), a piston head (6), an excitation coil (7), a right piston rod (8), a right cylinder head (9), a support rod (10), an end cover (11), a locking nut (12), a spring I (13), a piezoelectric device (14), and a spring II (15); the end cover (1) and the left piston rod (2) are fixedly connected by screws; the inner wall of the left piston rod (2) is machined with a groove, and the energy processing device (3) is placed in the groove; the energy processing device (3) is composed of a full-bridge rectifier filter circuit, the input end is connected to the lead wire of the piezoelectric device (14), and the output end is connected to the lead wire of the excitation coil (7). The left piston rod (2) and the right piston rod (8) are fastened together by threads, and the piston head (6) is fixedly clamped; the left piston rod (2) passes through the central through hole of the left cylinder head (4) and is sealed by a sealing ring; the left cylinder head (4) and the damper cylinder body (5) are fixedly connected by screws and sealed by a sealing ring; the excitation coil (7) is wound in the groove of the piston head (6); the lead wire of the excitation coil (7) is connected to the energy processing device (3) through the lead wire groove on the surface of the piston head (6) and the lead wire hole of the left piston rod (2); the right piston rod (8) passes through the central through hole of the right cylinder head (9) and is sealed by a sealing ring; the right cylinder head (9), the damper cylinder body (5) and the end cover (11) are fixedly connected by screws; the support rod (10) and the end cover (11) Transition fit and fixed by locking nut (12); one end of spring I (13) is fixed on end cap (1) and the other end is fixed on piezoelectric device (14); one end of spring II (15) is fixed on piezoelectric device (14) and the other end is fixed on support rod (10); piezoelectric device (14) is made of piezoelectric ceramic sheets connected in parallel and suspended in the left piston rod (2) and right piston rod (8); the gap between the outer wall of piston head (6) and the inner wall of damper cylinder (5) forms the flow gap (16) of magnetorheological fluid; the gap between left cylinder cover (4), damper cylinder (5), left piston rod (2) and piston head (6) constitutes the left pressure chamber of damper; damper cylinder (5), piston head (6), right piston rod (8) and right cylinder cover (9) The gap between the two parts constitutes the right pressure chamber of the damper; both the left and right pressure chambers are filled with magnetorheological fluid; when the end cap (1), the left piston rod (2), and the right piston rod (8) reciprocate linearly relative to the damper cylinder (5), the spring I (13) fixed on the end cap (1) and the spring II (15) fixed on the support rod (10) deform. The elastic force generated by the deformation of the spring I (13) and the spring II (15) causes the piezoelectric element (14) to be compressed, thereby generating an alternating voltage. The generated alternating voltage is transmitted to the energy processing device (3) through the lead wire. The energy processing device (3) converts the alternating voltage into a direct current suitable for the use of the magnetorheological damper and transmits it to the excitation coil (7) through the lead wire, thus playing the role of self-powered power supply.

[0007] Compared with the prior art, the self-powered electromagnetic rheodynamic damper system of this utility model has the following advantages:

[0008] (1) The present invention provides a self-powered electromagnetic rheodynamic damper system, which has the combined functions of controllable damping force output, energy self-collection and energy self-processing.

[0009] (2) Compared with the traditional magnetorheological damper, the self-powered electromagnetic rheodynamic damper system of this utility model has an energy harvesting device and an energy processing device, which can generate alternating voltage and convert the alternating voltage into DC current suitable for use by the magnetorheological damper, so as to provide energy to the magnetorheological damper.

[0010] (3) The self-powered electromagnetic rheostat damper system of this utility model has a compact structure and occupies little space. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the flow gap of the magnetorheological fluid of this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] like Figure 1 As shown, this utility model comprises: an end cover (1), a left piston rod (2), an energy processing device (3), a left cylinder head (4), a damper cylinder body (5), a piston head (6), an excitation coil (7), a right piston rod (8), a right cylinder head (9), a support rod (10), an end cover (11), a locking nut (12), a spring I (13), a piezoelectric device (14), and a spring II (15).

[0015] like Figure 2 The diagram shows the flow gap of the magnetorheological fluid of this invention. The gap between the outer wall of the piston head (6), the outer wall of the excitation coil (7), and the inner wall of the damper cylinder (5) forms the flow gap (16) of the magnetorheological fluid.

[0016] The working principle of this utility model is as follows:

[0017] When current flows through the excitation coil, a magnetic field perpendicular to the direction of fluid flow is formed in the flow gap (16). After the magnetorheological fluid flows through the fluid flow channel, the magnetorheological fluid generates a magnetorheological effect, and the shear stress increases. At this time, under external excitation, the end cap (1) and the left piston rod (2) move, driving the piston head (6) and the right piston rod (8) to move. Due to the increase in shear stress, a large output damping force is generated, which hinders the movement of the end cap (1), the left piston rod (2), the piston head (6), and the right piston rod (8), thus achieving a damping and vibration reduction effect. Changing the magnitude of the current flowing through the excitation coil changes the output damping force. When the end cap (1), left piston rod (2), right piston rod (8) move relative to the damper cylinder (5), the spring I (13) fixed on the end cap (1) and the spring II (15) fixed on the support rod (10) deform. The elastic force generated by the deformation of the spring I (13) and the spring II (15) compresses the piezoelectric device (14). The piezoelectric device (14) is made of piezoelectric ceramic sheets connected in parallel. It will deform under the action of external force, thereby generating an alternating voltage. The generated alternating voltage is transmitted to the energy processing device (3) through the lead wire. The energy processing device (3) is composed of a bridge rectifier filter circuit, which can convert the alternating voltage into DC power suitable for the magnetorheological damper and transmit it to the excitation coil (7) through the lead wire, thus playing the role of self-powered power supply.

Claims

1. A self-powered electromagnetic rheodynamic damper system, characterized in that... include: The system consists of an end cap (1), a left piston rod (2), an energy processing device (3), a left cylinder head (4), a damper cylinder (5), a piston head (6), an excitation coil (7), a right piston rod (8), a right cylinder head (9), a support rod (10), an end cover (11), a locking nut (12), a spring I (13), a piezoelectric device (14), and a spring II (15). The end cap (1) is fixedly connected to the left piston rod (2) by screws. The inner wall of the left piston rod (2) has a groove, in which the energy processing device (3) is placed. The energy processing device (3) is composed of a full-bridge rectifier filter circuit. The input end is connected to the lead wire of the piezoelectric device (14), and the output end is connected to the lead wire of the excitation coil (7). The left piston rod (2) and the right piston rod (8) are fastened together by threads, and the piston head (6) is fixedly clamped. The left piston rod (2) passes through the central through hole of the left cylinder head (4) and is sealed by a sealing ring. The left cylinder head (4) and the right piston rod (8) are fixedly connected by screws. The damper cylinder (5) is fixedly connected by screws and sealed by a sealing ring; the excitation coil (7) is wound in the groove of the piston head (6); the lead wire of the excitation coil (7) is connected to the energy processing device (3) through the lead wire groove on the surface of the piston head (6) and the lead wire hole of the left piston rod (2); the right piston rod (8) passes through the central through hole of the right cylinder head (9) and is sealed by a sealing ring; the right cylinder head (9), the damper cylinder (5) and the end cover (11) are fixedly connected by screws; the support rod (10) is transitionally fitted with the end cover (11) and fixed by a lock nut (12); one end of the spring I (13) is fixed on the end cover (1) and the other end is fixed on the piezoelectric device (14); one end of the spring II (15) is fixed on the piezoelectric device (14) and the other end is fixed on the support rod (10); the piezoelectric device (14) is made of piezoelectric ceramic sheets connected in parallel and is suspended in the left piston rod (2) and the right piston rod (8).

2. The self-powered electromagnetic rheodynamic damper system according to claim 1, characterized in that: The gap between the outer wall of the piston head (6), the outer wall of the excitation coil (7), and the inner wall of the damper cylinder (5) forms the flow gap (16) of the magnetorheological fluid; the gap between the left cylinder head (4), the damper cylinder (5), the left piston rod (2), and the piston head (6) constitutes the left pressure chamber of the damper; the gap between the damper cylinder (5), the piston head (6), the right piston rod (8), and the right cylinder head (9) constitutes the right pressure chamber of the damper; both the left and right pressure chambers are filled with magnetorheological fluid.

3. The self-powered electromagnetic rheodynamic damper system according to claim 1, characterized in that: When the end cap (1), left piston rod (2), and right piston rod (8) reciprocate linearly relative to the damper cylinder (5), the spring I (13) fixed on the end cap (1) and the spring II (15) fixed on the support rod (10) deform. The elastic force generated by the deformation of the spring I (13) and the spring II (15) compresses the piezoelectric element (14), thereby generating an alternating voltage. The generated alternating voltage is transmitted to the energy processing device (3) through the lead wire. The energy processing device (3) converts the alternating voltage into a direct current suitable for the magnetorheological damper and transmits it to the excitation coil (7) through the lead wire, thus playing the role of self-powered power supply.

Images