Integrated electromagnetic energy-fed vibration isolator

Abstract

The present invention provides an integrated electromagnetic energy harvesting vibration isolator. It is characterized in that the electromagnetic energy harvesting vibration isolator includes a moving coil type electromagnetic linear actuator based on a Halbach permanent magnet array, a vibration isolator guide rod, upper and lower end covers, a sealing cover, upper and lower lugs. The permanent magnet body of the electromagnetic linear actuator is attached to the inner side of the outer magnetic yoke. The coil is divided into a vibration damping coil group and an energy harvesting coil group. The coil skeleton, the inner magnetic yoke and the piston rod are connected by bolts. End covers are provided at the upper and lower ends of the outer magnetic yoke, and lubricating parts are arranged in the lower end cover. While giving full play to the active control performance advantages of the electromagnetic energy harvesting vibration isolator, the present invention recovers vibration energy to make up for the electric energy consumed by active control, and solves the contradiction problems among the structural size, vibration damping performance and energy consumption of the active vibration isolator. The integrated electromagnetic energy harvesting vibration isolator has the characteristics of high power density, low energy consumption, high control precision, stroke modularization, etc., effectively improving the overall performance of the vibration isolator.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration isolation, and particularly relates to an integrated electromagnetic energy harvesting vibration isolator. Background Art

[0002] Currently, the mainstream electromagnetic energy harvesting vibration isolators adopt time-sharing multiplexing of vibration reduction and energy harvesting, and face some common basic problems in the marketization process: the contradiction among structural size, vibration reduction performance, and energy consumption, which increases the complexity of the design process of electromagnetic energy harvesting vibration isolators. To further accelerate the development of new energy vehicles, high-end intelligent equipment and other fields, electromagnetic energy harvesting vibration isolators urgently need to break through in terms of dynamic performance, energy consumption, control accuracy, and working stability.

[0003] In the existing patented technologies, a composite energy harvesting vibration isolator (patent application number: 201810408935.1, authorization announcement number: CN 108928203 A) includes a vehicle body, a vibration reduction spring, a magnetorheological damper, a wheel, an electromagnetic actuator mechanical transmission mechanism, an electric motor, a motor drive power supply connector, a motor encoder interface, and a speed reducer. A magnetorheological damper is provided at the lower end of the vehicle body. A wheel is installed at the lower end of the magnetorheological damper. A spring is assembled on the magnetorheological damper. An electromagnetic actuator mechanical transmission structure is provided at the lower end of the vehicle body. A speed reducer is installed at the right end of the electromagnetic actuator mechanical transmission mechanism. An electric motor is provided at the right end of the speed reducer. A motor drive power supply interface and a motor encoder interface are inlaid at the right end of the electric motor. The motor drive power supply interface is provided below the motor encoder interface. An electromagnetic actuator mechanical transmission mechanism is installed on the right side of the magnetorheological damper. The magnetorheological damper and the electromagnetic actuator mechanical transmission mechanism are connected in parallel. The vibration isolator of this patented technology has a complex internal structure, low power density, and high manufacturing cost.

[0004] In the existing patented technologies, an electromagnetic linear energy harvesting suspension based on a MacPherson structure (patent number: 201810405428.2, authorization publication number: CN 108638780 A) includes a moving coil type electromagnetic linear actuator, a suspension vibration isolator, and a suspension spring. The moving coil type electromagnetic linear actuator is connected in series with the suspension vibration isolator and is arranged inside the suspension spring and in parallel with the suspension spring. This patented technology can achieve the time-sharing multiplexing function of vibration reduction and energy harvesting by connecting the spring in parallel with the moving coil type electromagnetic linear actuator. However, a group of coils can only achieve the energy harvesting function, and only the spring is used to achieve the vibration reduction function, which is difficult to meet the working bandwidth of the vibration isolator. Summary of the Invention

[0005] The present invention integrates the vibration reduction and energy feeding functions in the structure, and proposes a new configuration of an integrated electromagnetic energy feeding vibration isolator based on a moving coil electromagnetic linear actuator. The moving coil electromagnetic linear actuator uses an electromagnetic coil as a mover. The mechanism applies the principle of a voice coil motor to the vibration isolator. The electromagnetic coil is in a uniform air gap magnetic field formed by internal and external permanent magnets. The active control of the vibration isolator is achieved by controlling the magnitude of the current in the coil, and the vibration energy is recovered through an external energy feeding circuit. While giving full play to the advantages of the active control performance of the electromagnetic energy feeding vibration isolator, the vibration energy is recovered to make up for the electric energy consumed by the active control, solving the contradiction between the structural size, vibration reduction performance and energy consumption of the active vibration isolator. The integrated electromagnetic energy feeding vibration isolator has three working modes, namely, energy feeding mode, vibration reduction mode, and vibration reduction-energy feeding mixed mode, which can be switched between multiple modes according to the vibration conditions. The integrated electromagnetic energy feeding vibration isolator has high power density, low energy consumption, high control accuracy, modular stroke, and effectively improves the overall performance of the vibration isolator.

[0006] An integrated electromagnetic energy-feeding vibration isolator comprises a vibration isolator guide rod (1), a lubricating component (2), a permanent magnetic array (3), a coil (4), a coil frame (5), an outer magnetic yoke (6), an upper end cover (7), a sealing end cover (8), a lower end cover (9), an inner magnetic yoke (10), and a lifting lug (11). The characteristics thereof include: the permanent magnetic array (3) is a Halbach permanent magnetic array layer, which is composed of axially magnetized permanent magnets (3.1) and radially magnetized permanent magnets (3.2) arranged alternately and closely to each other, the permanent magnets are attached to the inner side of the outer magnetic yoke (6), the inner magnetic yoke (10) is connected to the guide rod (1) of the vibration isolator guide rod by bolts, and the outer magnetic yoke (6) is coaxially connected to the upper end cover (7), the lower end cover (9), and the lubricating component (2) to serve as the primary. The coil (4) is wound in a groove of a coil frame (5) and connected to a guide rod (1) of a vibration isolator, and can perform reciprocating linear motion in a magnetic field formed by a permanent magnet array (3) as a secondary. The coil frame (5) is a cylindrical annular groove structure with one end open, and the inner magnetic yoke (10) is a cylindrical structure with one end open. The inner magnetic yoke (10) is connected to the coil frame (5) by bolts.

[0007] The integrated electromagnetic energy-feeding vibration isolator of the present invention adopts the Halbach permanent magnet array to enhance the air gap magnetic field strength, improve the power density of the moving coil linear actuator, and highly integrate the energy feeding and vibration reduction functions to form an integrated electromagnetic energy-feeding vibration isolator, which recovers vibration energy to make up for the electric energy consumed by active control, and solves the contradiction between the structural size, vibration reduction performance and energy consumption of the active vibration isolator. It is equipped with three working modes, energy-feeding mode, vibration reduction mode, and vibration reduction-energy-feeding hybrid mode. The new electromagnetic energy-feeding vibration isolator proposed in the present invention adopts an integrated design, which integrates the technical advantages of electromagnetic linear actuators and has the advantages of self-supplied energy, high power density, fast response speed, high control accuracy and modular stroke.

[0008] The integrated electromagnetic energy - feeding vibration isolator of the present invention integrates the functions of vibration reduction and energy feeding in terms of structure, so as to achieve efficient vibration suppression and utilization. The guide rod, inner magnetic yoke and coil skeleton of the vibration isolator are connected by bolts. The permanent - magnet arrays in the outer magnetic yoke are arranged according to the Halbach array. End caps are provided at both ends of the outer magnetic yoke, and lubricating parts are provided inside the lower end cap. The structure is compact, ensuring low power consumption in the vibration - reduction mode and improving energy recovery in the energy - feeding mode at the same time.

[0009] In the integrated electromagnetic energy - feeding vibration isolator of the present invention, due to the fast response and precise control of the moving - coil linear motor, a current commutation process is added. When the electromagnetic linear actuator is in the vibration - reduction mode, only one - phase winding of the vibration - reduction coil group is energized. During the movement of the secondary coil from the vertical magnetic field to the axial magnetic field, commutation is carried out every time it passes through 3 / 5 of its own length, ensuring that the energized coil is always in a uniform magnetic field. The magnitude of the electromagnetic force is determined by the coil current, and the direction of the current determines the direction of the electromagnetic force. In the energy - feeding mode of the moving - coil electromagnetic linear actuator, the energy - feeding coil cuts the magnetic induction lines in the uniform magnetic field to generate an induced electromotive force, which is then led to the energy storage unit through an external circuit. When the vehicle is in good road conditions, the vibration - reduction coil group and the energy - feeding coil group work simultaneously to achieve a vibration - reduction - energy - feeding hybrid mode.

[0010] The integrated electromagnetic energy - feeding vibration isolator of the present invention has a high degree of structural integration, realizes self - energy supply, has a large power density, a fast response speed, a high control precision, and modularized stroke, effectively improving the overall performance of the vibration isolator. After being put into industrial application, it will generate huge economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the integrated electromagnetic energy - feeding vibration isolator of the present invention.

[0012] Figure 2 It is a schematic diagram of the coil grouping of the integrated electromagnetic energy - feeding vibration isolator of the present invention.

[0013] Figure 3 It is a schematic diagram of current commutation in the single - mode of the integrated electromagnetic energy - feeding vibration isolator of the present invention.

[0014] Figure 4 It is a schematic diagram of the multi - working - mode switching of the integrated electromagnetic energy - feeding vibration isolator of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0016] As Figures 1 to 2As shown in the figure, the integrated electromagnetic energy-fed vibration isolator includes a vibration isolator guide rod (1), a lubricating part (2), a permanent magnet array (3), a coil (4), a coil bobbin (5), an outer yoke (6), an upper end cover (7), a sealing end cover (8), a lower end cover (9), an inner yoke (10), and a lug (11). Its features include: The permanent magnet array (3) is a Halbach permanent magnet array layer, which is composed of axially magnetized permanent magnets (3.1) and radially magnetized permanent magnets (3.2) arranged alternately and closely. The permanent magnets are attached to the inner side of the outer yoke (6). The inner yoke (10) is bolted to the guide rod (1) of the vibration isolator guide rod. The outer yoke (6) is coaxially connected to the upper end cover (7), the lower end cover (9), and the lubricating part (2) as the primary part. The coil (4) is wound in the groove of the coil bobbin (5) and is connected to the guide rod (1) of the vibration isolator, and can perform reciprocating linear motion in the magnetic field formed by the permanent magnet array (3) as the secondary part. The coil bobbin (5) is a cylindrical ring groove structure with one end open, and the inner yoke (10) is a cylindrical structure with one end open. The inner yoke (10) is bolted to the coil bobbin (5). The coil (4) is composed of a vibration damping coil winding (4.1) and an energy-fed coil winding (4.2). The vibration damping coil winding (4.1) is composed of a forward winding coil and a reverse winding coil. The winding directions of adjacent windings are opposite. The number of forward windings is 2 groups, and the number of reverse windings is 2 groups. Coil ① and coil ③ are connected in series to form the first-phase winding, and coil ② and coil ④ are connected in series to form the second-phase winding. The winding directions of the coils in the two-phase windings are opposite. The energy-fed coil winding (4.2) is composed of a forward winding and a reverse winding. The winding directions of adjacent windings are opposite. The number of forward windings is two groups, and the number of reverse windings is two groups. Coil ⑤ and coil ⑦ are connected in series to form the first-phase winding, and coil ⑥ and coil ⑧ are connected in series to form the second-phase winding. The winding directions of the coils in the two-phase windings are opposite. The number of radially magnetized permanent magnets in the Halbach permanent magnet array (3) is m, and the number of axially magnetized permanent magnets is (m + 1). By reversing the current, stable electromagnetic force output and energy recovery are achieved, and by splicing different numbers of permanent magnet groups, stroke modularization is realized. A lubricating part (2) is provided at the center of the lower end cover (9). A sealing end cover (8) is provided on the lubricating part (2). The sealing end cover (8) is fixedly connected to the lower end cover (9) by bolts in a circumferential distribution manner. The lower end cover (9) is fixedly connected to the outer yoke (6) by bolts. The air gap width between the inner yoke (10) and the outer yoke (6) is much larger than the air gap width between the coil (4) and the permanent magnet array (3).

[0017] For the described integrated electromagnetic energy-fed vibration isolator, its feature lies in splicing the axially magnetized permanent magnets (3.1) and the radially magnetized permanent magnets (3.2), and by adding a current commutation process to the vibration damping coil winding (4.1) and the energy-fed coil winding (4.2), stroke modularization is realized.

[0018] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

[0019] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The integrated electromagnetic energy-fed vibration isolator includes a vibration isolator guide rod (1), a lubricating part (2), a permanent magnet array (3), a coil (4), a coil skeleton (5), an outer magnetic yoke (6), an upper end cover (7), a sealing end cover (8), a lower end cover (9), an inner magnetic yoke (10), and a lug (11), and is characterized by: The permanent magnet array (3) is a Halbach permanent magnet array layer, which is composed of axially magnetized permanent magnets (3.1) and radially magnetized permanent magnets (3.2) arranged alternately and closely. The permanent magnets are attached to the inner side of the outer magnetic yoke (6). The inner magnetic yoke (10) is bolted to the vibration isolator guide rod (1). The outer magnetic yoke (6) is coaxially connected to the upper end cover (7), the lower end cover (9), and the lubricating part (2) as the primary. The coil (4) is wound in the groove of the coil skeleton (5) and is connected to the vibration isolator guide rod (1), and can perform reciprocating linear motion in the magnetic field formed by the permanent magnet array (3) as the secondary. The coil skeleton (5) is a cylindrical ring groove structure with one end open. The inner magnetic yoke (10) is a cylindrical structure with one end open. The inner magnetic yoke (10) is bolted to the coil skeleton (5). The coil (4) is composed of a vibration damping coil winding (4.1) and an energy harvesting coil winding (4.2). The vibration damping coil winding (4.1) is composed of a forward winding coil and a reverse winding coil. The winding directions of adjacent windings are opposite. The number of forward windings is 2 groups, and the number of reverse windings is 2 groups. Coil ① and coil ③ are connected in series to form the first-phase winding, and coil ② and coil ④ are connected in series to form the second-phase winding. The winding directions of the coils in the two-phase windings are opposite. The energy harvesting coil winding (4.2) is composed of a forward winding and a reverse winding. The winding directions of adjacent windings are opposite. The number of forward windings is two groups, and the number of reverse windings is two groups. Coil ⑤ and coil ⑦ are connected in series to form the first-phase winding, and coil ⑥ and coil ⑧ are connected in series to form the second-phase winding. The winding directions of the coils in the two-phase windings are opposite. The number of radially magnetized permanent magnets in the Halbach permanent magnet array (3) is m, and the number of axially magnetized permanent magnets is (m + 1). By current commutation, stable electromagnetic force output and energy recovery are achieved. By combining different numbers of permanent magnet groups, stroke modularization is realized. A lubricating part (2) is provided at the center of the lower end cover (9). A sealing end cover (8) is provided on the lubricating part (2). The sealing end cover (8) is fixedly connected to the lower end cover (9) by bolts in a circumferential distribution manner. The lower end cover (9) is fixedly connected to the outer magnetic yoke (6) by bolts. The air gap width between the inner magnetic yoke (10) and the outer magnetic yoke (6) is much larger than the air gap width between the coil (4) and the permanent magnet array (3).

2. The integrated electromagnetic energy-fed vibration isolator according to claim 1, characterized in that The axially magnetized permanent magnets (3.1) and the radially magnetized permanent magnets (3.2) are spliced, and by adding a current commutation process to the vibration damping coil winding (4.1) and the energy harvesting coil winding (4.2), stroke modularization is achieved.

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