Damping inerter with electromagnetic damping unit

Abstract

A damping inerter with an electromagnetic damping unit comprises a supporting structure unit, a translation inertia unit, a rotation inertia unit, the electromagnetic damping unit and a transmission unit, the translation inertia unit is arranged on the supporting structure unit in a reciprocating motion mode, and the two sides of the translation inertia unit are connected with the supporting structure unit through rigidity units. The electromagnetic damping unit comprises a rotating shaft, magnetic steel, a conductive alloy plate and a magnetism isolating steel plate, the magnetism isolating steel plate is arranged on the rotating shaft, the magnetic steel is arranged on the magnetism isolating steel plate, the transmission unit drives the rotating shaft to rotate, so that the magnetic steel and the conductive alloy plate move relatively, and the rotation inertia unit is connected with the rotating shaft. The internal narrow space of the wind generating set and the arrangement mode of a traditional damper are taken into consideration, the mass adjustable range of the damper is widened through the internal rotation inertia element, larger inertia force and shorter movement stroke are obtained on the basis that the overall mass is not changed, and the overall stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation, and in particular relates to a damping inertia container with an electromagnetic damping unit. Background Art

[0002] At present, tuned mass damper (TMD, hereinafter referred to as damper) is one type of damper. TMD is a structural vibration control device that can reduce the vibration of buildings or other structures and improve the stability and safety of the structure. It usually consists of a mass block, springs and damping. Its principle is to use the inertial effect of the mass block to offset the vibration of the structure. The spring is used to connect the mass block and the structure, while the damping is used to reduce the amplitude and frequency of the structural vibration.

[0003] As one of the important structural components of wind power generation, the unique structural characteristics of wind turbine blades make the effect of environmental loads on the blades more obvious, and the vibration and resonance problems inside the blades are serious. By installing dampers on the wind turbine blades, the effect of increasing resistance can be effectively achieved, thereby reducing the vibration of the blades and improving the stability and safety of the structure.

[0004] However, the internal space of wind turbine blades is very limited, and the first-order natural frequency of the blades is usually relatively low. Controlling low-order vibration modes will place high requirements on the total weight and motion stroke of the mass block. Therefore, traditional tuned mass dampers will not be suitable for vibration control of wind turbine blades due to the influence of volume, deployment space, etc. Excessive tuning mass will affect the stability of the wind turbine blades.

[0005] The slide-type tuned mass damper used in the blades of wind turbines is very different from traditional dampers. The following are the main key factors: frequent mass swings, complex working conditions with periodic gravity effects, the damper is bidirectionally vibrated (longitudinal damped vibration, lateral gravity and centrifugal force forced vibration), high reliability; unattended, free of high maintenance requirements. The frequency edge, limited travel and gravity of the pendulum damper are key factors. Utility Model Content

[0006] In order to overcome the deficiencies of the above-mentioned technology, the purpose of the utility model is to provide a damping inertia container with an electromagnetic damping unit.

[0007] The technical solution adopted by the utility model is: a damping inertia container with an electromagnetic damping unit, comprising a supporting structure unit, a translational inertia unit, a rotational inertia unit, an electromagnetic damping unit and a transmission unit, wherein the translational inertia unit is reciprocatingly arranged on the supporting structure unit, both sides of the translational inertia unit are connected to the supporting structure unit through a stiffness unit, the stiffness unit provides elastic force for the translational inertia unit, the electromagnetic damping unit comprises a rotating shaft, a magnetic steel, a conductive alloy plate and a magnetic isolation steel plate, the magnetic isolation steel plate is arranged on the rotating shaft, the magnetic steel is arranged on the magnetic isolation steel plate, the transmission unit drives the rotating shaft to rotate, thereby causing the magnetic steel and the conductive alloy plate to move relative to each other, and the rotational inertia unit is connected to the rotating shaft.

[0008] Furthermore, the rotational inertia unit includes a flywheel connected to the rotating shaft.

[0009] Furthermore, the translational inertial unit includes a mass block.

[0010] Furthermore, the stiffness unit includes a spring, and two ends of the spring are respectively connected to the mass block and the supporting structure unit.

[0011] Furthermore, a bearing is provided on the mass block, and the rotating shaft is provided in the bearing.

[0012] Optionally, the transmission unit includes a synchronous pulley, a synchronous belt, and two steering wheels respectively arranged on both sides of the synchronous pulley, the synchronous pulley is connected to the rotating shaft, one end of the synchronous belt is connected to one end of the supporting structure unit, and the other end is connected to the other end of the supporting structure unit after being wound through a steering wheel, the synchronous pulley, and another steering wheel. Thus, the synchronous pulley can drive the rotating shaft to rotate. The steering wheel is installed on the mass block.

[0013] Optionally, the transmission unit includes a gear and a rack, the two ends of the rack are respectively connected to the two ends of the supporting structure unit, the gear is meshed with the rack, and the gear is connected to the rotating shaft, so that the gear can drive the rotating shaft to rotate.

[0014] Furthermore, side rollers are respectively provided on both sides of the mass block, a lower roller is provided at the lower part of the mass block, a side track matching with the side rollers is provided on the supporting structure unit, and a lower track matching with the lower rollers is provided on the supporting structure unit.

[0015] Furthermore, disc springs are respectively arranged at both ends of the mass block, and the disc springs play a buffering role.

[0016] Compared with the prior art, the utility model has the following beneficial effects: compared with pendulum-type, liquid sloshing, particle-type and other dampers, the slide-type tuned mass damper of the utility model does not require redundant mass, gravity is not a key factor, and the effective mass ratio is greater than 50%; the magnets in the electromagnetic damping unit are made of permanent magnetic materials and adsorbed on both sides of the magnetic isolation steel plate. There is an adjustable gap between the magnets and the conductive alloy plate. The number of magnets and the size of the gap can be designed / adjusted according to actual conditions. When the magnets and the conductive alloy plate move relative to each other (i.e., the conductive alloy plate cuts the magnetic flux lines), eddy currents are generated, thereby hindering the interaction between the two and providing damping force for the system. The size of the damping force can be controlled by increasing or decreasing the magnets and adjusting the gap according to design requirements; the mass and diameter of the flywheel are designed according to the optimal inertia force required by the inertia container, the number of flywheels is not limited to one, and the inertia force can be controlled by adjusting the number of flywheels when the design requirements change; in the stiffness unit, both ends of the spring are fixed to the Although the spring stiffness of the supporting structure unit and the translational inertia unit is fixed, the overall stiffness of the stiffness unit can be adjusted by the depth of screwing the screw plug; the utility model has a relatively flat appearance, which makes full use of the hollow cavity in the blade, with a shock absorption rate of 70%, reduces the amplitude of blade vibration, and improves the fatigue life of the blade; the damper is installed on the wind turbine blade by bolts on the bracket in the supporting unit, and then bonded by glue, so the connection is convenient and firm; the supporting unit uses lightweight materials (aluminum profiles, plastics, fiberglass, carbon fiber, etc.) as the frame body, and the surface of the frame is bonded with wear-resistant steel plates to reduce the overall weight and improve the longitudinal strength of the track; the tuned mass damper fully considers the narrow space inside the wind turbine and the layout of the traditional damper, and the internal rotation inertia element improves the adjustable mass range of the damper. On the basis of not changing the overall mass, a greater inertial force and a shorter motion stroke are obtained, thereby improving the overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 is a structural schematic diagram of the supporting structure unit;

[0020] Figure 4 It is a structural diagram of the translational inertial unit;

[0021] Figure 5 It is a structural schematic diagram of the rotation inertia unit;

[0022] Figure 6 is a structural schematic diagram of the electromagnetic damping unit;

[0023] Figure 7It is a structural schematic diagram of a transmission unit;

[0024] Figure 8 It is a structural schematic diagram of another transmission unit;

[0025] Fig. 9 It is a structural diagram of the stiffness unit. DETAILED DESCRIPTION

[0026] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 9 As shown, a damping inertia container with an electromagnetic damping unit includes a supporting structure unit 1, a translational inertia unit 2, a rotational inertia unit 3, an electromagnetic damping unit 4 and a transmission unit 5. The translational inertia unit 2 is reciprocatingly arranged on the supporting structure unit 1. Both sides of the translational inertia unit 2 are connected to the supporting structure unit 1 through a stiffness unit 9. The stiffness unit 9 provides elastic force for the translational inertia unit 2. The electromagnetic damping unit 4 includes a rotating shaft 401, a magnetic steel 402, a conductive alloy plate 403 and a magnetic isolation steel plate 404. The magnetic isolation steel plate 404 is arranged on the rotating shaft 401, and the magnetic steel 402 is arranged on the magnetic isolation steel plate 404. The transmission unit 5 drives the rotating shaft 401 to rotate, so that the magnetic steel 402 and the conductive alloy plate 403 move relative to each other. The rotational inertia unit 3 is connected to the rotating shaft 401.

[0028] The conductive alloy plate 403 can be made of, but not limited to, copper plate, aluminum plate, etc. according to actual conditions. There is a gap between the magnetic steel 402 and the conductive alloy plate 403, and the width of the gap can be adjusted. The number of magnetic steels and the size of the gap can be designed and adjusted according to actual conditions. When the magnetic steel and the conductive alloy plate move relative to each other, they will cut the magnetic flux lines and generate eddy currents, thereby hindering the interaction between the two and providing damping force for the system. In this process, kinetic energy is converted into heat energy to achieve the purpose of energy consumption.

[0029] Furthermore, the rotational inertia unit 3 includes a flywheel 301, and the flywheel 301 is connected to the rotating shaft 401. The rotational inertia unit 3 also includes components such as a flywheel seat, a flywheel bearing, and a bearing seat to provide a frequency modulation function. The flywheel is connected to the rotating shaft through the flywheel seat, the flywheel seat is inserted in the flywheel bearing, and the flywheel bearing is installed on the bearing seat, wherein the mass and diameter of the flywheel are designed according to the optimal inertia force required by the inertia container, and the number and model of the flywheel are not limited to one, so as to improve the adjustable inertia range of the tuned mass system.

[0030] Furthermore, the translational inertial unit 2 includes a mass block 201 .

[0031] Furthermore, the stiffness unit 9 includes a spring 901, and the two ends of the spring 901 are respectively connected to the mass block 201 and the support structure unit 1. The spring provides elastic force for the movement of the mass block along the track, and provides a corresponding frequency together with the translational inertia unit. The two ends of the spring are respectively fixed to the support structure unit and the translational inertia unit by screw plugs, and the stiffness of the stiffness unit as a whole can be adjusted by controlling the screwing depth of the screw plug.

[0032] Furthermore, a bearing 405 is provided on the mass block 201 , and the rotating shaft 401 is provided in the bearing 405 .

[0033] Optionally, the transmission unit 5 includes a synchronous pulley 501, a synchronous belt 502, and two steering wheels 503 respectively arranged on both sides of the synchronous pulley 501, the synchronous pulley 501 is connected to the rotating shaft 401, one end of the synchronous belt 502 is connected to one end of the supporting structure unit 1, and the other end is connected to the other end of the supporting structure unit 1 after being wound through a steering wheel 503, the synchronous pulley 501 and another steering wheel 503. Thus, the synchronous pulley can drive the rotating shaft to rotate. The steering wheel 503 is installed on the mass block 201.

[0034] Optionally, the transmission unit 5 includes a gear 504 and a rack 505, the two ends of the rack 505 are respectively connected to the two ends of the supporting structure unit 1, the gear 504 is meshed with the rack 505, and the gear 504 is connected to the rotating shaft 401. Thus, the gear 504 can drive the rotating shaft to rotate.

[0035] Furthermore, side rollers 202 are respectively provided on both sides of the mass block 201, a lower roller 203 is provided at the lower part of the mass block 201, a side track 6 matching with the side rollers 202 is provided on the support structure unit 1, and a lower track 7 matching with the lower roller 203 is provided on the support structure unit 1.

[0036] Furthermore, disc springs 8 are respectively provided at both ends of the mass block 201. The disc springs 8 play a buffering role.

[0037] The above embodiments are based on the technical solution of the present utility model, and provide detailed implementation methods and specific operation processes, but the protection scope of the present utility model is not limited to the above embodiments.

Claims

1. A damping inertia container having an electromagnetic damping unit, characterized in that: The invention comprises a supporting structure unit (1), a translational inertia unit (2), a rotational inertia unit (3), an electromagnetic damping unit (4) and a transmission unit (5); the translational inertia unit (2) is arranged on the supporting structure unit (1) in a reciprocating manner; both sides of the translational inertia unit (2) are connected to the supporting structure unit (1) via a rigidity unit (9); the rigidity unit (9) provides elastic force for the translational inertia unit (2); the electromagnetic damping unit (4) comprises a rotating shaft (401), a magnetic steel (402), a conductive alloy plate (403) and a magnetic isolation steel plate (404); the magnetic isolation steel plate (404) is arranged on the rotating shaft (401); the magnetic steel (402) is arranged on the magnetic isolation steel plate (404); the transmission unit (5) drives the rotating shaft (401) to rotate, thereby causing the magnetic steel (402) and the conductive alloy plate (403) to move relative to each other; and the rotational inertia unit (3) is connected to the rotating shaft (401).

2. A damping inertia container with an electromagnetic damping unit as claimed in claim 1, characterized in that: The rotational inertia unit (3) comprises a flywheel (301), and the flywheel (301) is connected to a rotating shaft (401).

3. A damping inertia container with an electromagnetic damping unit as claimed in claim 1, characterized in that: The translational inertial unit (2) comprises a mass block (201).

4. A damping inertia container with an electromagnetic damping unit as claimed in claim 3, characterized in that: The stiffness unit (9) comprises a spring (901), and two ends of the spring (901) are respectively connected to the mass block (201) and the supporting structure unit (1).

5. The damping inertia container with an electromagnetic damping unit according to claim 3, characterized in that: A bearing (405) is provided on the mass block (201), and the rotating shaft (401) is provided in the bearing (405).

6. A damping inertia container with an electromagnetic damping unit as claimed in claim 3, characterized in that: Side rollers (202) are respectively arranged on both sides of the mass block (201), a lower roller (203) is arranged at the lower part of the mass block (201), a side track (6) matched with the side rollers (202) is arranged on the support structure unit (1), and a lower track (7) matched with the lower roller (203) is arranged on the support structure unit (1).

7. A damping inertia container with an electromagnetic damping unit as claimed in claim 3, characterized in that: Disc springs (8) are respectively provided at both ends of the mass block (201).

8. The damping inertia container with an electromagnetic damping unit according to claim 1, characterized in that: The transmission unit (5) comprises a synchronous pulley (501), a synchronous belt (502) and two steering wheels (503) respectively arranged on both sides of the synchronous pulley (501); the synchronous pulley (501) is connected to the rotating shaft (401); one end of the synchronous belt (502) is connected to one end of the supporting structure unit (1); the other end is wound around a steering wheel (503), the synchronous pulley (501) and another steering wheel (503) and then connected to the other end of the supporting structure unit (1).

9. The damping inertia container with an electromagnetic damping unit according to claim 1, characterized in that: The transmission unit (5) comprises a gear (504) and a rack (505), the two ends of the rack (505) are respectively connected to the two ends of the supporting structure unit (1), the gear (504) is meshed with the rack (505), and the gear (504) is connected to the rotating shaft (401).

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