CN115163733A - Magnetic vibration damping device and magnetic vibration damping system - Google Patents
Magnetic vibration damping device and magnetic vibration damping system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/002—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion characterised by the control method or circuitry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/06—Drive shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/08—Sensor arrangement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/18—Control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/30—Sealing arrangements
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Abstract
In a magnetic damping device and a magnetic damping system provided by the present disclosure, the magnetic damping device may include: the magnetic vibration damping device is arranged on the periphery of a transmission shaft of a vehicle and used for supporting and damping vibration, and the magnetic vibration damping device comprises: the magnetic vibration damper is of a circular ring structure, and a hollow part in the center is used for being connected with the transmission shaft; a bearing for mounting the drive shaft; a damping layer disposed outside the bearing; a permanent magnet part is arranged on the periphery of the bearing; the outside of the permanent magnet part is provided with a magnetic coil which is connected with a power supply and is used for changing the magnetism of the permanent magnet part. By changing the natural frequency of the magnetic vibration damper, the jolt caused by the vehicle self-reason is reduced, and the comfort level of drivers and passengers is improved.
Description
Technical Field
The invention relates to the field of vehicle control, in particular to a magnetic vibration damping device and a magnetic vibration damping system.
Background
With the economic development, more and more vehicles enter common families, and more people drive to go out. The demand for comfort in vehicles is therefore also increasing. The vehicle is subjected to jolts during travel, which are caused in some cases by road conditions, but in some cases by the vehicle itself. When a vehicle runs, excitation is generated, for example, the engine rotates at a high speed to generate excitation, and the transmission shaft rotates to generate excitation in the process of transmitting torque and rotating speed, so that abnormal vibration of the vehicle is caused. The bumping of the vehicle can seriously affect the riding comfort, and how to improve the bumping problem caused by the vehicle, which is very important to improve the comfort of driving or riding the vehicle.
Disclosure of Invention
In order to solve the above technical problem, the present disclosure provides a magnetic damping device and a magnetic damping system.
In a first aspect, the present disclosure provides a magnetic vibration damping device, which may include: the magnetic vibration damping device is arranged on the periphery of a transmission shaft of a vehicle and used for supporting and damping vibration, and the magnetic vibration damping device comprises: the magnetic vibration damper is of a circular ring structure, and a hollow part in the center is used for being connected with the transmission shaft; a bearing for mounting the drive shaft; a damping layer disposed outside the bearing; a permanent magnet part is arranged at the periphery of the bearing; the outside of the permanent magnet part is provided with a magnetic coil which is connected with a power supply and is used for changing the magnetism of the permanent magnet part.
In some embodiments, the permanent magnet part may include: a magnet disposed between the bearing and the magnetic coil. The permanent magnet part can be in the form of a magnet which surrounds the bearing, wherein the magnet can be composed of atoms such as iron, cobalt, nickel and the like, and the internal structure of the atoms is special, so that the permanent magnet part has a magnetic moment. The magnet is capable of generating a magnetic field and has a property of attracting a ferromagnetic substance such as iron, nickel, cobalt, or the like. The cross section of the magnet can be square, round, oval or the like. The magnet is a material which is low in price and easy to obtain, and the permanent magnet part of the magnetic vibration damper with the mature processing technology chain can save cost and is easy to process.
In some embodiments, the permanent magnet part may include: the damping layer having magnetic properties. The permanent magnet part can be a damping layer with magnetism, namely, a common damping layer is changed into the damping layer with magnetism through the design of adding magnetism to the damping layer, so that the damping layer has the functions of magnetism and damping. The magnetic property of the damping layer is changed through changing the magnetic property of the magnetic coil, so that the natural frequency of the magnetic damping device can be changed, and the structure of the magnetic damping device are not required to be changed, so that the magnetic damping device can be suitable for damping structures of different types of vehicles, and the magnetic damping device has wider application range and prospect. The material of the damping layer can be magnetic rubber material, magnetic sponge tissue, magnetic metal spring, etc. In some embodiments, the damping layer comprises a first part and a second part, and the first part and the second part are respectively provided with a bearing connecting part and a coil connecting part; the bearing connecting part is used for connecting with the bearing; the coil connecting portion is for connection with the magnetic coil. The first and second parts are two symmetrical structures, the bearing connection portion for connection to the bearing and the coil connection portion for connection to the magnet coil, such that the damping layer acts as a buffer between the bearing and the magnet coil. The damping layer is divided into two parts, and the buffering effect of the damping layer is further increased.
In some embodiments, the magnetic damping device may further comprise: and the inner support frame is arranged between the bearing connecting part and the coil connecting part and is used for supporting the vibration damping layer.
In some embodiments, the magnetic damping device may further comprise: and the dustproof ring surrounds the bearing for one circle and has sealing and dustproof functions.
In some embodiments, the magnetic damping device may further comprise: sealing the bracket: the sealing support is arranged on the bearing connecting part and used for supporting the dustproof ring.
In some implementations, the magnetic vibration damping device may further include: an outer bolster disposed about the magnet coil.
In a second aspect, there is provided a magnetic damping system for use in any one of the above magnetic damping devices, the magnetic damping system further comprising a sensor, a signal receiver and a controller; the sensor is used for acquiring speed information of the vehicle; the signal receiver is connected with the sensor and the controller, and is used for receiving the speed information acquired by the sensor and sending the speed information to the controller; the controller is configured to perform the steps of: calculating a rigidity value according to the speed information; and adjusting the magnetism of the magnetic coil according to the rigidity value.
In some embodiments, said adjusting the magnetism of said magnet coil in accordance with said stiffness value magnitude comprises: comparing the rigidity value with a preset threshold value; if the stiffness value does not exceed the threshold, reducing the current of the magnet coil; increasing the current of the magnetic coil if the stiffness value exceeds the threshold.
In some embodiments, said adjusting the magnetism of said magnet coil in accordance with said stiffness value magnitude comprises: comparing the rigidity value with a preset threshold value; changing the direction of current flow within the magnet coil if the stiffness value exceeds the threshold.
In the vehicle driving process, along with the change of speed, the in-process rotation of transmission shaft transmission moment of torsion and rotational speed produces excitation etc., lead to the vehicle to appear abnormal vibration, at present, carry out the damping through installing a damping device on the transmission shaft, damping device is provided with the rubber layer (the corresponding damping layer of this application), cushion the oscillation through the rubber layer, and realize reducing vibration, this kind of effect is not ideal, and the frequency of transmission shaft can change along with the change of speed, and damping device itself also has a natural frequency, when the frequency of transmission shaft is the same with damping device's natural frequency, resonance phenomenon can appear, damping device can not reduce vibration like this, can not play the damping effect, still can increase the range of vibration, make the vibration of vehicle more violent.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: according to the magnetic vibration damping device provided by the disclosure, the vibration damping layer is used for damping vibration generated by a vehicle in a driving process, the permanent magnet part and the magnetic coil are arranged outside the bearing, the magnetic coil is connected with a power supply, and the magnetism of the magnetic coil is changed by controlling the change of the current of the power supply, so that the magnetism of the permanent magnet part is changed, the magnetism of the magnetic vibration damping device is further changed, the rigidity of the magnetic vibration damping device can be changed by changing the magnetism, and further the natural frequency of the magnetic vibration damping device is changed. The natural frequency of the magnetic vibration damper is changed, so that the condition that the frequency of the transmission shaft is the same as the natural frequency of the magnetic vibration damper is avoided, the resonance phenomenon of the transmission shaft and the magnetic vibration damper is avoided, the stability of the vehicle is provided, jolting caused by the vehicle self is reduced, and the comfort level of drivers and passengers is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 illustrates a schematic view of a magnetic vibration damping device and a driveshaft in accordance with certain embodiments of the present disclosure;
FIG. 2 illustrates a perspective view of a magnetic vibration damping device according to some embodiments of the present disclosure;
FIG. 3 illustrates a cut-away view of a magnetic vibration damping device according to some embodiments of the present disclosure;
FIG. 4 illustrates a perspective view of a magnetic damping device in accordance with further embodiments of the present disclosure;
FIG. 5 shows a cut-away view of a magnetic vibration damping device according to further embodiments of the present disclosure.
In the figure: 10 magnetic damping device, 20 transmission shaft, 11 damping layer, 12 magnet, 13 bearing, 14 magnetic coil, 15 sealing bracket, 16 outer bracket, 17 dust ring, 18 inner bracket, 110 first part, 111 second part, 112 bearing connecting part, 113 coil connecting part.
Detailed Description
The disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable one of ordinary skill in the art to better understand and thus implement the present disclosure, and do not imply any limitation on the scope of the present disclosure.
As used herein, the term "include" and its variants are to be read as open-ended terms meaning "including, but not limited to. The term "based on" is to be read as "based, at least in part, on". The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment". The term "another embodiment" is to be read as "at least one other embodiment".
To solve the above problems, the present disclosure provides a magnetic damper device, as shown in fig. 1, in which a magnetic damper device 10 is annular and surrounds a propeller shaft 20, and the propeller shaft 20 is an important structure in a vehicle, and may be a shaft capable of transmitting power in a universal transmission device. It is a rotating body with high rotating speed and less support, so its dynamic balance is very important. Before leaving the factory, the transmission shaft is subjected to dynamic balance test and is adjusted on a balancing machine. In a front engine rear wheel drive vehicle, the rotation of a transmission is transmitted to a shaft of a final drive.
As shown in fig. 2 and 3, the magnetic damper 10 has a specific structure in which a bearing 13 is located on an inner ring of the magnetic damper 10 having a ring-shaped structure, a magnet 12 is wound around an outer periphery of the bearing 13, and a magnet coil 14 is provided on an outer periphery of the magnet. The damping layer 11 is connected to the bearing 13 via a bearing connection 112 on one side and to the magnet coil 14 via a coil connection 113 on the other side. The magnetic coil 14 is connected to a power source, and by controlling the variation of the current of the power source, the magnetic properties of the magnetic coil 14, and thus of the magnet 12, and thus of the magnetic damping device 10, are varied.
Rigidity is the degree to which a structure is easily deformed by various external forces. The variation in magnetic force causes a variation in the relative ease of deformation, i.e. a change in stiffness, between the objects.
When an object is free to vibrate, the displacement of the object changes with time according to a sine law, which is also called simple harmonic vibration. The amplitude and initial phase of the simple harmonic vibration are related to the initial conditions of the vibration, and the period or frequency of the vibration is not related to the initial conditions but is related to the inherent characteristics of the system. The frequency of an object is related to its stiffness, mass, physical dimensions, and when it deforms, it is restored by the elastic force. The elastic force is mainly related to the size and the rigidity, and the magnetic force can change the rigidity, namely the rigidity, of the object, and further can change the frequency of the object.
The natural frequency of the magnetic damping device 10 is determined by the mass and stiffness, and is given by the formula:
;
wherein f is the natural frequency; k is stiffness in units of newtons per meter; m is mass in kg.
In the driving process of a vehicle, along with the change of speed, the rotation of a transmission shaft in the process of transmitting torque and rotating speed generates excitation and the like, so that abnormal vibration of the vehicle occurs, at present, a vibration damping device is arranged on the transmission shaft for vibration damping, the vibration damping device is provided with a rubber layer (a corresponding vibration damping layer of the application), vibration is buffered through the rubber layer, and vibration reduction is realized. As can be seen from the above equation, varying the magnetic properties of the magnet coils 14 changes the natural frequency of the magnetic vibration damping device 10.
In some disclosed implementations, the magnetic damping device 10 shown in fig. 4 and 5 is the same as the above embodiments and is not repeated, in this embodiment, the permanent magnet portion is a damping layer 11 with magnetism, and the material of the damping layer 11 may be a rubber material with magnetism, or a sponge tissue with magnetism, or a metal spring with magnetism, etc. The magnetic damping 11 can also be realized by adding a magnetic design to the damping layer 11 and changing the magnetism of the damping layer 11 through the change of the magnetism of the magnetic coil 14, wherein the first part 110 and the second part 111 are distributed with the bearing connecting part 112 and the coil connecting part 113; the bearing connecting portion 112 is used for connecting with the bearing 13; the coil connecting portion 113 is used for connection with the magnetic coil 14. The first portion 110 and the second portion 111 are two symmetrical structures, the bearing connection portion 110 for connection with the bearing 13 and the coil connection portion 111 for change of the natural frequency of the magnetic damping device 10 with the magnetic coil 14 without changing the structure and configuration of the magnetic damping device 10 itself, so that the magnetic damping device of the present disclosure can be adapted to damping structures of different types of vehicles, resulting in a wider range of applications and prospects for the present magnetic damping device 10.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: in the magnetic vibration damping device 10 provided by the present disclosure, the vibration damping layer 11 is used for damping vibration generated during driving of a vehicle, and the permanent magnet part and the magnetic coil 14 are arranged outside the bearing 13, wherein the permanent magnet part can be a magnet 12, the magnetic coil 14 is connected with a power supply, and the magnetism of the magnetic coil 14 and further the magnetism of the magnet 12 and further the magnetism of the magnetic vibration damping device 10 are changed by controlling the change of the current of the power supply, and the rigidity of the magnetic vibration damping device 10 and further the natural frequency of the magnetic vibration damping device 10 can be changed by changing the magnetism. By changing the natural frequency of the magnetic vibration damper 10, the condition that the frequency of the transmission shaft 20 is the same as the natural frequency of the magnetic vibration damper 10 is avoided, so that the resonance phenomenon of the transmission shaft 20 and the magnetic vibration damper 10 is avoided, the stability of the vehicle is provided, the jolt caused by the self reason of the vehicle is reduced, and the comfort level of drivers and passengers is improved.
In some embodiments, as shown in fig. 2-5, the damping layer 11 is coupled between the bearings 13 and the magnet coils 14 such that the damping layer 11 acts as a buffer between the bearings 13 and the magnet coils 14. The damping layer 11 is divided into two parts and the damping effect of the damping layer 11 is further increased.
In some embodiments, as shown in fig. 2-5, the magnetic vibration damping device 10 may further include: and the inner support frame 18, the inner support frame 18 is arranged between the bearing connecting part 112 and the coil connecting part 113, and is used for supporting the damping layer 11. The inner bracket 18 is used for keeping a certain shape of the damping layer 11, and ensures that the damping layer 11 has a good damping effect. The inner bracket 18 can be supported by metal materials, such as iron, stainless steel, etc., and the metal materials have certain hardness, are not easy to deform, and can play a good supporting role.
In some embodiments, as shown in fig. 2-5, the magnetic vibration damping device 10 may further include: and the dust ring 17 is used for sealing and preventing dust, and the dust ring 17 surrounds the bearing 13 for one circle. The dust ring 17 can be made of rubber or plastic, surrounds the bearing 13 by interference, and is tightly attached to the outer surface of the transmission shaft 20, so that dust or water can be prevented from entering the bearing 13, the bearing 13 is protected, and the service life of the bearing 13 can be prolonged.
In some embodiments, as shown in fig. 2-5, the magnetic vibration damping device 10 may further include: the sealing bracket 15: the seal holder 15 is provided at the bearing connecting portion 112 for holding the dust seal 17. Because the dust ring 17 is made of plastic or rubber materials, the texture is soft, the sealing support 15 can enable the dust ring 17 to maintain a certain shape, the dust ring 17 is supported, and the dust ring 17 can better play a role in dust prevention and sealing.
In some embodiments, as shown in fig. 2-5, the magnetic vibration damping device 10 may further include: an outer support 16, the outer support 16 being disposed at the outer periphery of the magnet coil 14. The outer bracket 16 is disposed at the outermost periphery of the magnetic damper 10, and can support and protect the internal structure of the magnetic damper 10, so that the magnetic damper 10 always maintains a certain shape.
The disclosure also provides a magnetic damping system, which is applied to the magnetic damping device 10 described in any one of the above items, and the magnetic damping system can further comprise a sensor, a signal receiver and a controller; the sensor is used for acquiring the speed information of the vehicle; the signal receiver is connected with the sensor and the controller, and is used for receiving the speed information acquired by the sensor and sending the speed information to the controller; the controller is used for executing the following steps: calculating a rigidity value according to the speed information; and adjusting the magnetism of the magnetic coil according to the rigidity value.
In the current vibration damping devices, once the vibration damping device is produced, the natural frequency of the vibration damping device cannot be changed. Only the vibration problem of a certain range of frequency band can be solved. The vibration damping effect cannot be produced when the propeller shaft 20 vibrates in other frequency bands. That is to say, only the vibration frequency of the transmission within a certain speed range can play a certain vibration damping effect, but if the change of the speed is not within the range, the vibration damping structure cannot play a vibration damping effect, and even sometimes the vibration damping structure and the transmission shaft form resonance to increase the amplitude of vibration.
In the magnetic vibration damping device 10 with adjustable frequency provided by the present disclosure, after a product is produced, the current of the magnetic coil 14 is changed, so that the magnetism of the magnet 12 or the magnetic vibration damping layer 11 is changed, and further, the frequency of the intermediate support is adjusted by changing the rigidity, so that the intermediate support is matched with the vibration performance of the whole vehicle, an optimal vibration damping effect is achieved, and the problems of vehicle vibration noise and the like are solved or eliminated.
The magnetic damping system can be adjusted by: the sensor is arranged in the vehicle and used for acquiring the running speed of the vehicle in real time or determining the running speed of the vehicle through information such as wheel speed and the like, namely the speed information of the vehicle, and sending the acquired speed information to the signal receiver, the signal receiver is connected with the sensor and the controller, the signal receiver sends the received speed information to the controller, and the controller determines the vibration frequency or the range of the vibration frequency of the transmission shaft 20 according to the current running speed, so that the magnetic property of the magnetic coil is judged to be adjusted, and the vibration damping effect of the vibration damping device 10 is improved.
The magnetic properties of the magnetic coil can be adjusted by controlling the direction and intensity of the current through the magnetic coil. The magnetic properties of the permanent magnet part of the magnetic damping device are fixed, i.e. the magnitude and the magnetic poles of the magnetic properties are fixed, but the change of the overall magnetic properties can be controlled by a change of the magnetic properties of the magnet coil. For example, the power supply connected to the magnetic coil may be controlled by the controller, the direction of the current may be controlled by controlling the power supply, and the magnetic pole of the magnetic coil may be changed, and the magnitude of the power supply current may be controlled by the controller, and the magnitude of the current in the magnetic coil may be changed, so that the magnitude of the magnetism of the magnetic coil may be changed, and the magnitude of the magnetism of the magnetic vibration damping device may be changed, so that the stiffness of the magnetic vibration damping device may be changed, and the frequency of the magnetic vibration damping device may be changed. A change of the natural frequency of the magnetic damping device is achieved. The natural frequency of the magnetic vibration damper is changed, so that the condition that the frequency of the transmission shaft is the same as the natural frequency of the magnetic vibration damper is avoided, the resonance phenomenon of the transmission shaft and the magnetic vibration damper is avoided, the stability of the vehicle is provided, jolting caused by the vehicle self is reduced, and the comfort level of drivers and passengers is improved.
In some embodiments, adjusting the magnetic properties of the magnetic coil based on the magnitude of the stiffness value comprises: comparing the rigidity value with a preset threshold value; if the stiffness value does not exceed the threshold, reducing the current of the magnetic coil; if the stiffness value exceeds a threshold value, the current of the magnet coil is increased. The repulsion force in the magnetic vibration damper is adjusted by changing the current in the magnetic coil, so that the frequency of the vibration damping structure is adjusted.
In the embodiment, the required rigidity value of the magnetic coil can be calculated according to the speed, the required rigidity value is compared with the threshold value, if the required rigidity value does not exceed the threshold value, the current of the magnetic coil can be reduced, and the electromagnetic repulsion force is reduced, so that the rigidity of the vibration damping device is reduced, and the vibration frequency of the vibration device is reduced; if the required rigidity value is larger than the threshold value, the current of the magnetic coil can be increased, the electromagnetic repulsion force is increased, the rigidity of the vibration damping device is increased, and the vibration frequency of the vibration device is increased. In the embodiment, the requirement of the rigidity value is determined according to the speed information, so that the current of the magnetic coil is correspondingly adjusted, and the vibration reduction effect is ensured.
In other embodiments, the magnetic coil may be connected to a power source, a sensor, a signal receiver, and a controller. The sensor can also comprise an acceleration sensor and a speed sensor, wherein the acceleration sensor can sense the vibration condition of the transmission system and acquire the vibration acceleration in real time; the acceleration sensor is preferably arranged near the position of the inner frame. The rotating speed of the transmission shaft is obtained through vehicle speed conversion sensed by the speed sensor, and no sensor is additionally arranged. And calculating according to the vehicle speed, the dynamic rotation radius of the tire, the reduction ratio of the speed reducer and the gear transmission ratio of the gearbox. And obtaining the rotation frequency of the transmission shaft according to the rotation speed of the transmission shaft. The vibration signal and the rotating speed signal are sent to a signal receiver. The signal receiver is connected with the controller. And judging whether the frequency of the vibration damping structure needs to be adjusted or not according to the vibration acceleration condition, when the vibration acceleration exceeds a certain threshold value, introducing a controller, adjusting the magnetic field of the electromagnetic coil according to the rotation speed and the vibration frequency of the transmission shaft, and controlling the rigidity of the vibration damping layer or the magnet, so that the frequency of the magnetic vibration damping device is changed, and the frequency of the magnetic vibration damping device achieves the optimal vibration damping effect.
In some embodiments, adjusting the magnetism of the magnetic coil based on the magnitude of the acceleration value comprises: comparing the rigidity value with a preset threshold value; if the stiffness value exceeds a threshold value, the direction of the current in the magnet coil is changed. In this embodiment, the controller may control the power supply to change the direction of the current so that the magnetic properties of the magnetic coil may be changed, and by changing the magnetic properties of the magnetic coil, the repulsive or attractive force between the magnetic coil and the magnet may be changed, or the magnetic properties of the magnetic damping layer may be changed, thereby changing the stiffness of the magnetic damping device and the frequency of the magnetic damping device accordingly.
Through the magnetic vibration damper, the change of magnetism is ingeniously utilized, the rigidity of the magnetic vibration damper is changed, and further the rigidity of the magnetic vibration damper is changed, the rigidity of the finished magnetic vibration damper can be changed according to the change of the motion frequency of a vehicle, the frequency of the magnetic vibration damper is different from the motion frequency of the vehicle, the magnetic vibration damper can damp vibration with different frequencies, the phenomenon of resonance with the vehicle cannot occur, the stability of the vehicle is further submitted, jolting caused by the self reason of the vehicle is reduced, and the comfort level of drivers and passengers is improved.
It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.
It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.
It is further understood that unless otherwise specified, "connected" includes direct connections between the two without other components, indirect connections between the two with other elements, and communication connections that do not have a physical relationship but are capable of information or data transfer.
It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. A magnetic vibration damping device, characterized in that the magnetic vibration damping device (10) is provided at the outer periphery of a propeller shaft (20) of a vehicle for supporting and damping a vibration, the magnetic vibration damping device (10) comprising:
the magnetic vibration damper (10) is of a circular ring structure, and a hollow part at the center is used for being connected with the transmission shaft (20);
a bearing (13), said bearing (13) being for mounting said drive shaft;
a damping layer (11), the damping layer (11) being disposed outside the bearing;
a permanent magnet part is arranged at the periphery of the bearing (13);
the outside of the permanent magnet part is provided with a magnetic coil (14), and the magnetic coil (14) is connected with a power supply and is used for changing the magnetism of the permanent magnet part.
2. The magnetic vibration damping device according to claim 1, wherein the permanent magnet portion comprises: a magnet (12), the magnet (12) disposed between the bearing and the magnetic coil.
3. The magnetic vibration damping device according to claim 1 or 2, characterized in that the permanent magnet portion comprises: the damping layer (11) having magnetic properties.
4. The magnetic vibration damping device according to claim 3,
the damping layer (11) comprises a first part (110) and a second part (111), and a bearing connecting part (112) and a coil connecting part (113) are distributed on the first part (110) and the second part (111);
the bearing connecting part (112) is used for connecting with the bearing (13);
the coil connecting part (113) is used for connecting with the magnetic coil (14).
5. The magnetic vibration damping device according to claim 4, further comprising:
an inner bracket (18), the inner bracket (18) being disposed between the bearing connection portion (112) and the coil connection portion (113) for supporting the damping layer (11).
6. The magnetic vibration damping device according to claim 4 or 5, characterized in that the magnetic vibration damping device (10) further comprises:
and the dust ring (17) surrounds the bearing (13) for one circle and is used for sealing and preventing dust.
7. The magnetic vibration damping device according to claim 6, characterized in that the magnetic vibration damping device (10) further comprises:
sealing support (15): the sealing support (15) is arranged on the bearing connecting part (112) and used for supporting the dust ring (17).
8. The magnetic vibration damping device according to claim 1, characterized in that the magnetic vibration damping device (10) further comprises:
an outer support (16), the outer support (16) being disposed at an outer periphery of the magnet coil (14).
9. A magnetic damping system, characterized in that it employs a magnetic damping device (10) according to any of claims 1-8;
the magnetic vibration reduction system is provided with a sensor, a signal receiver and a controller;
the sensor is used for acquiring speed information of the vehicle;
the signal receiver is connected with the sensor and the controller, and is used for receiving the speed information acquired by the sensor and sending the speed information to the controller;
the controller is configured to perform the steps of:
calculating a rigidity value according to the speed information;
and adjusting the magnetism of the magnetic coil according to the rigidity value.
10. The magnetic damping system of claim 9, wherein the adjusting the magnetism of the magnet coil based on the magnitude of the stiffness value comprises:
comparing the rigidity value with a preset threshold value;
if the stiffness value does not exceed the threshold, reducing the current of the magnetic coil;
increasing the current of the magnet coil if the stiffness value exceeds the threshold.
11. The magnetic damping system according to claim 9 or 10, wherein said adjusting the magnetism of said magnet coil according to said magnitude of stiffness value comprises:
comparing the rigidity value with a preset threshold value; changing the direction of current flow within the magnet coil if the stiffness value exceeds the threshold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211086495.5A CN115163733A (en) | 2022-09-07 | 2022-09-07 | Magnetic vibration damping device and magnetic vibration damping system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211086495.5A CN115163733A (en) | 2022-09-07 | 2022-09-07 | Magnetic vibration damping device and magnetic vibration damping system |
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| CN115163733A true CN115163733A (en) | 2022-10-11 |
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| CN202211086495.5A Pending CN115163733A (en) | 2022-09-07 | 2022-09-07 | Magnetic vibration damping device and magnetic vibration damping system |
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