Multi-magnetic-pole energy collection type rotary magnetorheological damper

Abstract

The utility model discloses a multi-magnetic-pole energy collection type rotary magnetorheological damper which is mainly composed of a connecting shaft, an end cover, a rotor, a magnet exciting coil, a magnetic isolation strip, a stator and the like. The rotor is provided with an arc-shaped magnetic pole, the stator is provided with an arc-shaped magnetic shoe, five damping gaps are formed in the space among the rotor, the stator, the left end cover and the right end cover, when a magnet exciting coil on the rotor is electrified, magnetorheological fluid in the damping gaps generates a magnetorheological effect, and the rotor can output controllable damping torque to the outside. Meanwhile, a magnetic field formed by the magnet exciting coil penetrates through the induction coil wound on the stator, in the rotating process of the rotor, the magnetic flux of the induction coil changes continuously, induced electromotive force is generated, energy can be stored or power can be supplied to the magnet exciting coil through a commutator or a rectifying circuit, energy consumption is reduced, and the service life of the motor is prolonged. According to the structure, the length of the damping gap can be effectively increased, the output damping torque is increased, meanwhile, the energy collection function is achieved, and the performance of the damper is improved.

Description

Technical Field

[0001] The utility model relates to a rotary magnetorheological damper, in particular to a multi-pole energy collection type rotary magnetorheological damper. Background Art

[0002] Traditional spring dampers are now widely used in various vibration reduction places, but with the rapid development of science and technology, traditional spring dampers can no longer meet the vibration reduction needs of various places. Magnetorheological fluid is a new type of intelligent material, mainly prepared by mixing nano- or micron-sized magnetic particles, base fluid and additives. Under the action of the magnetic field generated by the external current, it can quickly convert from a Newtonian fluid state to a Bingham fluid state, and this process is reversible. Magnetorheological damper is one of the magnetorheological intelligent devices. Thanks to the rheological effect of magnetorheological fluid, this device has the advantages of fast response, simple structure, small size and a large adjustable range of damping force. It is an ideal vibration isolation and vibration reduction device, and has broad application prospects in construction, military industry, vehicles and other aspects.

[0003] In practical applications, magnetorheological dampers are often in a vibrating environment. Under the action of the magnetic field, the magnetorheological fluid in the damping gap of the magnetorheological damper produces a magnetorheological effect and can output a large damping. In this process, almost all of the vibration energy is absorbed by the magnetorheological damper and converted into heat energy and dissipated, resulting in energy waste. In addition, traditional magnetorheological dampers have a relatively single function and can only output damping, which is not enough to solve the risk of magnetorheological dampers failing due to power failure in extremely harsh environments. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the utility model proposes a multi-pole energy harvesting rotary magnetorheological damper. Through structural layout design, an axial damping gap is formed between the arc-shaped magnetic poles on the rotor and the arc-shaped magnetic shoes on the stator, and four radial damping gaps are formed between the rotor and the left end cover and the right end cover. The axial damping gap and the four radial damping gaps together constitute the effective working area of ​​the magnetorheological damper. When current is passed through the excitation coil wound on the rotor, a magnetic field perpendicular to the gap is formed in the axial damping gap and the four radial damping gaps, and the magnetorheological fluid in the damping gap produces a magnetorheological effect. When relative rotation occurs between the rotor and the stator, the rotor outputs a corresponding damping torque to the outside, and its size can be adjusted by controlling the current in the excitation coil. This structural layout enables the proposed magnetorheological damper to effectively extend the length of the damping gap, increase the output damping force, and improve the space utilization rate of the damper without changing the structural dimensions. At the same time, the magnetic field formed by the excitation coil passes through the induction coil wound on the stator. During the rotation of the rotor, the magnetic flux of the induction coil changes continuously, generating an induced electromotive force. Energy can be stored or the excitation coil can be powered through a commutator or rectifier circuit, reducing energy consumption.

[0005] In order to achieve the above-mentioned purpose, the technology adopted by the utility model includes: a connecting shaft (1), a left end cover (2), an induction coil (3), a stator (4), a rotor (5), an excitation coil (6), a right end cover (7), a sealing cover (8) and a magnetic isolation strip (9); the right end of the connecting shaft (1) passes through the central through hole of the left end cover (2) and is fastened by screws; the right end of the left end cover (2) is closely attached to the stator (4) and is fastened by screws; the left end of the right end cover (7) is closely attached to the stator (4) and is fastened by screws; the left end of the sealing cover (8) is closely attached to the right end cover (7) and is fastened by screws; a bearing is provided between the left end of the rotor (5) and the connecting shaft (1). A bearing is provided between the right end of the rotor (5) and the right end cover (7), so that the rotor (5) is suspended in the stator (4); the induction coil (3) is wound on the stator (4); the excitation coil (6) is wound on the rotor (5); the stator (4) is provided with an arc-shaped magnetic shoe (401) structure; the rotor (5) is provided with an arc-shaped magnetic pole (501) structure, and a magnetic isolation strip (9) is provided between the arc-shaped magnetic poles (501) for isolation; the internal space formed by the left end cover (2), the stator (4), the rotor (5), and the right end cover (7) is filled with magnetorheological fluid; the left end cover (2), the stator (4), the rotor (5), and the right end cover (7) are made of magnetic conductive materials, and the connecting shaft (1) The sealing cover (8) and the magnetic isolation strip (9) are made of magnetic isolation material; a radial damping gap I (10) and a radial damping gap II (11) are formed between the left end cover (2) and the rotor (5); an axial damping gap III (12) is formed between the arc-shaped magnetic pole (501) on the rotor (5) and the arc-shaped magnetic shoe (401) on the stator (4); a radial damping gap IV (13) and a radial damping gap V (14) are formed between the right end cover (7) and the rotor (5); when current is passed through the excitation coil (6) wound on the rotor (5), the radial damping gap I (10), the radial damping gap II (11), the axial damping gap III (12) and the radial damping gap V (14) are closed. A magnetic field perpendicular to the gap is formed in the magnetic gap IV (13) and the radial damping gap V (14), and the magnetorheological fluid in the gap produces a magnetorheological effect. When the rotor (5) and the stator (4) rotate relative to each other, the rotor (5) outputs a corresponding damping torque to the outside, and the magnitude of the damping torque can be adjusted by controlling the current in the excitation coil (6). The magnetic field formed by the excitation coil (6) passes through the induction coil (3) wound on the stator (4). During the rotation of the rotor (5), the magnetic flux of the induction coil (3) changes continuously, generating an induced electromotive force, which can store energy or supply power to the excitation coil (6) through a commutator or a rectifier circuit, thereby reducing energy consumption.

[0006] Compared with the technical background, the utility model has the following beneficial effects:

[0007] (1) In the utility model, radial damping gaps I (10) and II (11) are formed between the left end cover (2) and the rotor (5), axial damping gaps III (12) are formed between the arc-shaped magnetic poles on the rotor (5) and the arc-shaped magnetic shoes (401) on the stator (4), radial damping gaps IV (13) and V (14) are formed between the right end cover (7) and the rotor (5), and the radial damping gaps I (10), II (11), III (12), IV (13) and V (14) together constitute the effective working area of ​​the magnetorheological damper; when the winding When current is passed through the excitation coil (6) on the rotor (5), a magnetic field perpendicular to the gap is formed in the radial damping gap I (10), the radial damping gap II (11), the axial damping gap III (12), the radial damping gap IV (13), and the radial damping gap V (14). The magnetorheological fluid in the gap produces a magnetorheological effect and outputs a corresponding damping torque to the outside. The magnitude of the damping torque can be adjusted by controlling the current in the excitation coil (6). This structural layout enables the proposed magnetorheological damper to effectively extend the damping gap length without changing the structural dimensions, increase the output damping force, and improve the space utilization rate of the damper.

[0008] (2) The magnetic field formed by the excitation coil (6) passes through the induction coil (3) wound on the stator (4). During the rotation of the rotor (5), the magnetic flux of the induction coil (3) changes continuously, generating an induced electromotive force, which can be used to store energy or supply power to the excitation coil (6) through a commutator or a rectifier circuit, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model.

[0010] Figure 2 It is a schematic diagram of magnetic force line distribution when the excitation coil of the utility model is energized.

[0011] Figure 3 It is a schematic diagram of magnetic force line distribution when the arc-shaped magnetic shoe and the arc-shaped magnetic pole of the utility model are aligned.

[0012] Figure 4 It is a schematic diagram of magnetic force line distribution when arc-shaped magnetic shoes and arc-shaped magnetic poles are interlaced in the utility model. DETAILED DESCRIPTION

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1The utility model comprises: a connecting shaft (1), a left end cover (2), an induction coil (3), a stator (4), a rotor (5), an excitation coil (6), a right end cover (7), a sealing cover (8) and a magnetic isolation strip (9).

[0015] Figure 2 The utility model is a schematic diagram of the magnetic force line distribution when the excitation coil is energized. The internal space formed by the left end cover (2), the stator (4), the rotor (5), and the right end cover (7) is filled with magnetorheological fluid; a radial damping gap I (10) and a radial damping gap II (11) are formed between the left end cover (2) and the rotor (5); an axial damping gap III (12) is formed between the arc-shaped magnetic pole (501) on the rotor (5) and the arc-shaped magnetic shoe (401) on the stator (4); a radial damping gap IV (13) and a radial damping gap V (14) are formed between the right end cover (7) and the rotor (5); the radial damping gap I (10), the radial damping gap II (11), the axial damping gap III (12), and the radial damping gap The radial damping gap IV (13) and the radial damping gap V (14) together constitute an effective working area of ​​the magnetorheological damper; when a current in the same direction is passed through the excitation coil (6) wound around the rotor (5), a magnetic field perpendicular to the gap is formed in the radial damping gap I (10), the radial damping gap II (11), the axial damping gap III (12), the radial damping gap IV (13), and the radial damping gap V (14), and the magnetorheological fluid in the gap produces a magnetorheological effect. When the rotor (5) and the stator (4) rotate relative to each other, the rotor (5) outputs a corresponding damping torque to the outside, and the magnitude of the damping torque can be adjusted by controlling the current in the excitation coil (6).

[0016] Figure 3 The utility model is a schematic diagram of the distribution of magnetic lines of force when the arc-shaped magnetic shoes and the arc-shaped magnetic poles are aligned. When the excitation coil (6) is supplied with current, when the arc-shaped magnetic poles (501) of the rotor (5) and the arc-shaped magnetic shoes (401) of the stator (4) are aligned, the generated magnetic lines of force sequentially pass through the arc-shaped magnetic poles (501) on the rotor (5) and the axial damping gap III (12) to reach the arc-shaped magnetic shoes (401) on the stator (4), and then pass through another section of the axial damping gap III (12) from the outer ring of the stator (4) to return to the rotor (5) to form a loop.

[0017] Figure 4 The utility model is a schematic diagram of the distribution of magnetic lines of force when the arc-shaped magnetic shoes and the arc-shaped magnetic poles are staggered. When the excitation coil (6) is supplied with current, when the arc-shaped magnetic poles (501) of the rotor (5) and the arc-shaped magnetic shoes (401) of the stator (4) are staggered, the path of the magnetic lines of force of the magnetic field generated by the excitation coil (6) changes, and the magnetic field generated by the excitation coil (6) passes through the axial damping gap III (12) from the rotor (5) to the stator (4), and then passes through the inner ring of the stator (4) through another section of the axial damping gap III (12) to return to the rotor (5) to form a loop.

[0018] The working principle of the utility model is as follows:

[0019] When current is passed through the excitation coil wound on the rotor, a magnetic field perpendicular to the gap is formed in the radial damping gap I, radial damping gap II, axial damping gap III, radial damping gap IV, and radial damping gap V, and the magnetorheological fluid in the gap produces a magnetorheological effect. When the rotor and the stator rotate relative to each other, the rotor outputs a corresponding damping torque, the magnitude of which can be adjusted by controlling the current in the excitation coil; the magnetic field formed by the excitation coil passes through the induction coil wound on the stator. During the rotation of the rotor, the magnetic flux of the induction coil changes continuously, generating an induced electromotive force, which can store energy or supply power to the excitation coil through a commutator or a rectifier circuit, thereby reducing energy consumption.

Claims

1. A multi-pole energy harvesting rotary magnetorheological damper, characterized in that include: A connecting shaft (1), a left end cover (2), an induction coil (3), a stator (4), a rotor (5), an excitation coil (6), a right end cover (7), a sealing cover (8) and a magnetic isolation strip (9); the right end of the connecting shaft (1) passes through the central through hole of the left end cover (2) and is fastened by screws; the right end of the left end cover (2) is closely attached to the stator (4) and is fastened by screws; the left end of the right end cover (7) is closely attached to the stator (4) and is fastened by screws; the left end of the sealing cover (8) is closely attached to the right end cover (7) and is fastened by screws; a bearing is provided between the left end of the rotor (5) and the connecting shaft (1), and a bearing is provided between the right end of the rotor (5) and the right end cover (7). The rotor (5) is suspended in the stator (4); the induction coil (3) is wound on the stator (4); the excitation coil (6) is wound on the rotor (5); the stator (4) is provided with an arc-shaped magnetic shoe (401) structure; the rotor (5) is provided with an arc-shaped magnetic pole (501) structure, and a magnetic isolation strip (9) is provided between the arc-shaped magnetic poles (501) for isolation; the internal space formed by the left end cover (2), the stator (4), the rotor (5), and the right end cover (7) is filled with magnetorheological fluid; the left end cover (2), the stator (4), the rotor (5), and the right end cover (7) are made of magnetic conductive material, and the connecting shaft (1), the sealing cover (8), the magnetic isolation strip ( 9) is made of magnetic isolation material; a radial damping gap I (10) and a radial damping gap II (11) are formed between the left end cover (2) and the rotor (5); an axial damping gap III (12) is formed between the arc-shaped magnetic pole (501) on the rotor (5) and the arc-shaped magnetic shoe (401) on the stator (4); a radial damping gap IV (13) and a radial damping gap V (14) are formed between the right end cover (7) and the rotor (5); when current is passed through the excitation coil (6) wound around the rotor (5), the radial damping gap I (10), the radial damping gap II (11), the axial damping gap III (12), and the radial damping gap IV ( 13) A magnetic field perpendicular to the gap is formed in the radial damping gap V (14), and the magnetorheological fluid in the gap produces a magnetorheological effect; when the rotor (5) and the stator (4) rotate relative to each other, the rotor (5) outputs a corresponding damping torque to the outside, the magnitude of which can be adjusted by controlling the current in the excitation coil (6); the magnetic field formed by the excitation coil (6) passes through the induction coil (3) wound on the stator (4), and during the rotation of the rotor (5), the magnetic flux of the induction coil (3) changes continuously, generating an induced electromotive force, which can store energy or supply power to the excitation coil (6) through a commutator or a rectifier circuit, thereby reducing energy consumption.

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