Vibration suppression and noise reduction cooling motor structure based on liquid metal

Abstract

The invention discloses a liquid metal-based vibration suppression and noise reduction cooling motor structure, which comprises a shell, a motor stator and a motor rotor, and is characterized in that the interior of the shell is of a hollow structure, the inner surface and the outer surface of the shell are covered with honeycomb structure units, and the interior of the hollow shell is divided into an upper semicircular ring layer cavity and a lower semicircular ring layer cavity; cavities of the upper and lower semicircular ring layers are filled with liquid metal; liquid metal-based magnetofluid is filled between the casing and the motor stator, and sealing rings are arranged at the two axial ends, in contact with the internal honeycomb structure, of the stator core. The honeycomb structures are designed on the inner surface and the outer surface of the shell, filling of the liquid metal and application of the liquid metal-based magnetofluid are combined, the heat dissipation performance of the motor is remarkably improved, the liquid metal-based magnetofluid plays a vibration reduction role between the stator and the shell, vibration impact in the operation of the motor is relieved, and the service life of the motor is prolonged. Noise generated during operation of the motor can be absorbed and attenuated, noise propagation is further reduced through an interference path of the honeycomb structure, and the motor can operate more quietly and stably.

Description

Technical Field

[0001] The invention relates to a structure which utilizes the characteristics of liquid metal and liquid metal-based magnetic fluid to realize efficient cooling of a motor and reduce vibration noise, and belongs to the technical field of cooling and vibration control of electric machinery. Background Art

[0002] In modern motor applications, especially in the fields of electric vehicles and industrial automation, motor temperature control and vibration and noise reduction have become crucial. Since motors generate a lot of heat during operation, if the heat cannot be dissipated in time, it will lead to reduced efficiency, shortened lifespan and even damage. In addition, the vibration and noise generated by the operation of the motor not only affect comfort, but may also cause mechanical fatigue. Most traditional cooling and vibration control solutions rely on air cooling, oil cooling or mechanical shock absorbers. These solutions have problems such as low cooling efficiency, complex structure and difficult maintenance. Summary of the invention

[0003] The technical solution to be solved by the present invention is to provide a vibration suppression and noise reduction cooling motor structure based on liquid metal, which realizes efficient cooling by utilizing the high thermal conductivity, good specific heat, low viscosity and stability of liquid metal, and effectively suppresses the vibration and noise of the motor by utilizing the non-Newtonian fluid characteristics of liquid metal-based magnetic fluid.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows: A liquid metal-based vibration suppression, noise reduction and cooling motor structure comprises a casing and a motor stator and rotor. The casing is a hollow structure with both inner and outer surfaces covered with honeycomb structural units. The interior of the hollow casing is divided into two upper and lower semicircular ring layer cavities, which are filled with liquid metal. Liquid metal-based magnetic fluid is filled between the casing and the motor stator, and sealing rings are provided at both axial ends where the stator core contacts the internal honeycomb structure.

[0005] Preferably, the filling amount of the liquid metal is 80-95%, preferably 95%, of the cavity capacity of the upper and lower semicircular ring layers; and the liquid metal is a sodium-potassium alloy.

[0006] Preferably, the external honeycomb structure extends toward the outside of the motor to increase the contact area between the casing and the outside air; the internal honeycomb structure extends toward the inside of the casing to increase the contact area between the casing and the liquid metal-based magnetic fluid.

[0007] Preferably, the filling method of the liquid metal-based magnetic fluid is as follows: the filling method of the liquid metal-based magnetic fluid is as follows: the entire casing is placed in a liquid metal-based magnetic fluid pool under a certain air pressure environment, and then the stator is pressed into the interior of the casing from one side in an interference fit or a transition fit manner, so that the stator is located in the center of the casing. Due to the close fit between the casing and the stator, the liquid metal-based magnetic fluid is filled and enclosed between the internal honeycomb structure and the outer surface of the stator.

[0008] Preferably, the stator core is shorter than the casing in the axial direction, the honeycomb structure on the inner surface of the casing is axially equal to the stator core, and there is no honeycomb structure at both ends inside the casing.

[0009] Preferably, the sealing ring is made of a high temperature resistant, corrosion resistant and leakproof resin material, and the resin material is a phenolic resin or a polyvinyl chloride resin.

[0010] Preferably, the honeycomb structure inside the casing is made of elastic alloy material, which improves the vibration reduction capability and enables the liquid metal-based magnetic fluid to fully contact with the outside of the stator.

[0011] The innovative features of the present invention are as follows: A. Hollow casing design: The casing is designed as an internal hollow structure, and the inner and outer surfaces are covered with honeycomb structural units. This honeycomb structure has unique extensions and functions inside and outside. The interior of the hollow casing is divided into two semicircular ring-shaped cavities, the upper and lower semicircular ring-shaped cavities are filled with a certain volume of liquid metal, which can enhance the heat conduction and heat dissipation functions on the one hand, and utilize the fluidity of the liquid metal on the other hand to achieve the effect of vibration reduction.

[0012] B. Function of the external honeycomb structure: The external honeycomb structure extends to the outside of the motor, significantly increasing the contact area with the outside air. This structural design not only effectively increases the heat dissipation area, but also uses the porous characteristics of the honeycomb structure to form natural convection, thereby enhancing the heat dissipation effect. In addition, the geometric characteristics of the honeycomb structure provide multiple interference paths for sound waves, which helps to weaken the noise propagation during motor operation and further reduce the overall noise.

[0013] C. Function of the internal honeycomb structure: The internal honeycomb structure extends into the interior of the casing, directly increasing the contact area with the liquid metal-based magnetic fluid. This structural design also helps to increase the heat exchange area, thereby improving the heat dissipation efficiency. The internal honeycomb structure also provides a sound wave interference path, slowing down the propagation of noise into the motor, and effectively improving the quietness of the motor. It has excellent performance in fracture toughness, impact resistance, heat dissipation, vibration reduction and noise reduction.

[0014] The internal honeycomb structure adopts elastic alloy, which further enhances the vibration reduction capability on the basis of the vibration reduction of the structure itself, and makes the liquid metal-based magnetic fluid fully contact with the outside of the stator.

[0015] Since the stator core is shorter than the casing in the axial direction, the internal honeycomb structure is equal in length to the stator core in the axial direction, and there is no honeycomb structure at both ends inside the casing.

[0016] D. Filling and function of liquid metal: 1. The upper and lower semicircular ring cavities inside the housing are filled with liquid metal with extremely high thermal conductivity (such as sodium potassium alloy). This liquid metal can not only efficiently absorb the heat generated by the motor when it is working, but also conduct the heat to the external environment through the housing, further improving the overall heat dissipation performance. The excellent thermal conductivity and fluidity of the liquid metal ensure that the heat can be evenly and quickly distributed, avoiding the impact of local overheating on the running stability of the motor.

[0017] 2. The two semicircular ring layer cavities are filled with 95% of the liquid metal. The liquid metal in the container will fluctuate as the motor starts. At first, these fluctuations are relatively regular, and as the vibration becomes more intense, they will gradually become disordered. This irregular fluctuation of the liquid will cause energy loss, thereby reducing the vibration level of the system. The resistance generated when the liquid metal contacts the container wall will cause energy loss, and when the shaking of the liquid metal becomes more intense, the influence of the resistance will become more prominent. When the liquid metal fluctuates continuously with the high-frequency vibration of the motor, a turbulent flow state will appear inside. This turbulent flow will further accelerate the consumption and loss of energy, thereby causing the vibration to weaken faster.

[0018] E. Application of liquid metal-based magnetic fluid between stator and casing: In the present invention, the filling method of the liquid metal-based magnetic fluid is as follows: the entire housing is placed in a liquid metal-based magnetic fluid pool under a certain air pressure environment, and then the stator is pressed into the housing from one side in an interference fit or transition fit manner, so that the stator is located in the center of the housing. Due to the close fit between the housing and the stator, the liquid metal-based magnetic fluid will be filled and enclosed between the internal honeycomb structure and the outer surface of the stator; when the space between the stator and the housing is filled with the liquid metal-based magnetic fluid, the motor is endowed with multiple excellent properties: 1. High thermal conductivity: Liquid metal-based magnetic fluid has extremely high thermal conductivity, which can quickly transfer the heat generated by the stator to the casing and further dissipate the heat through the casing, significantly enhancing the overall heat dissipation effect of the motor.

[0019] 2. Vibration suppression function: Since magnetic fluid has non-Newtonian fluid properties and has buffering capabilities, it can effectively absorb and alleviate the vibration generated when the motor is running; since it is attached to the outside of the stator, it can suppress vibration during operation and extend the service life of the motor.

[0020] 3. Noise reduction capability: Magnetic fluid can form an effective barrier to the noise generated during the operation of the motor. By absorbing and attenuating the energy of sound waves, it has a noise reduction effect and makes the motor quieter during operation.

[0021] 4. Colloid and chemical stability: Liquid metal-based magnetic fluid has excellent colloidal stability and chemical stability. Even under high temperature or complex environment, it can still maintain uniform distribution and long-term performance of the fluid, ensuring its long-term and stable function inside the motor.

[0022] F. Sealing measures for high temperature and corrosion resistant materials: To ensure that the liquid metal-based magnetic fluid always remains in the proper position between the stator and the casing, sealing rings made of high-temperature resistant, corrosion-resistant, and leak-proof resin materials are used to fix and encapsulate the magnetic fluid at both axial ends where the stator core contacts the internal honeycomb structure, ensuring that the magnetic fluid will not leak during motor operation and flow into the stator winding and rotor of the motor.

[0023] The present invention achieves the following beneficial effects through the above technical solution: 1. Efficient heat dissipation: By designing a honeycomb structure on the inner and outer surfaces of the casing, combined with the filling of liquid metal and the application of liquid metal-based magnetic fluid, the heat dissipation performance of the motor is significantly improved. The honeycomb structure increases the heat dissipation surface area, and the liquid metal quickly transfers the heat to the casing with extremely high thermal conductivity, and further dissipates it to the environment, effectively avoiding motor overheating and thus extending the service life of the motor. 2. Vibration and noise reduction: Liquid metal-based magnetic fluid plays a vibration reduction role between the stator and the casing, alleviating the vibration impact during the operation of the motor. At the same time, the magnetic fluid can also absorb and attenuate the noise generated when the motor is running. The interference path of the honeycomb structure further reduces the propagation of noise, making the motor run quieter.

[0024] 3. Stable structure: Liquid metal-based magnetic fluid is firmly encapsulated in the casing through high temperature resistant, corrosion resistant and leak-proof sealing materials, effectively preventing leakage during motor operation, ensuring that the fluid is always in the proper position, will not affect the core components of the motor, and improve the stability and reliability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other corresponding drawings can be obtained based on these drawings without creative work. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more obvious: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the longitudinal structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention after the stator and rotor are hidden.

[0026] In the figure: 1--honeycomb structure outside the casing, 2--honeycomb structure inside the casing, 3--honeycomb structure inside the casing, 4--machine base, 5--liquid metal, 6--liquid metal-based magnetic fluid, 7--motor stator and rotor, 8--sealing ring, 9--upper gold room, 10--lower gold room, 11--dividing gold beam. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment: A liquid metal-based vibration suppression, noise reduction and cooling motor structure includes a casing 1 and a motor stator and rotor 7. The interior of the casing 1 is a hollow structure, and the inner and outer surfaces are covered with honeycomb structural units, namely: a honeycomb structure 2 outside the casing and a honeycomb structure 3 inside the casing; the interior of the hollow casing is divided into two upper and lower semicircular ring layer cavities by a metal beam 11, namely an upper metal chamber 9 and a lower metal chamber 10, and the two semicircular ring layer cavities of the upper metal chamber 9 and the lower metal chamber 10 are respectively filled with liquid metal 5; liquid metal-based magnetic fluid 6 is filled between the casing 1 and the motor stator, and sealing rings 8 are provided at both axial ends where the stator core contacts the internal honeycomb structure.

[0029] In the two semicircular ring layer cavities of the upper gold room 9 and the lower gold room 10, the filling amount of the liquid metal 5 is 95% of the capacity of the upper and lower semicircular ring layer cavities; the liquid metal 5 is a sodium-potassium alloy.

[0030] The honeycomb structure outside the casing extends to the outside of the motor, increasing the contact area between the casing and the outside air; the honeycomb structure inside the casing extends to the inside of the casing, increasing the contact area between the casing and the liquid metal-based magnetic fluid.

[0031] The filling method of the liquid metal-based magnetic fluid 6 is as follows: the entire casing is placed in a liquid metal-based magnetic fluid pool under a certain air pressure environment, and then the stator is pressed into the casing from one side in an interference fit or transition fit manner, so that the stator is located in the center of the casing. Due to the close fit between the casing and the stator, the liquid metal-based magnetic fluid is filled and enclosed between the internal honeycomb structure and the outer surface of the stator.

[0032] Among them: the stator core is shorter than the casing in the axial direction, the honeycomb structure on the inner surface of the casing is equal in length to the stator core in the axial direction, and there is no honeycomb structure at both ends inside the casing.

[0033] The sealing ring 8 is made of a resin material that is resistant to high temperature, corrosion and leakage, and the resin material is a phenolic resin or a polyvinyl chloride resin.

[0034] The honeycomb structure inside the casing is made of elastic alloy material, which improves the vibration reduction ability while allowing the liquid metal-based magnetic fluid to fully contact the outside of the stator.

[0035] The above shows and describes the basic principles, main features and innovations of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid metal-based vibration suppression and noise reduction cooling motor structure, comprising a housing and a motor stator and rotor, characterized in that: The interior of the casing is a hollow structure, and the inner and outer surfaces are covered with honeycomb structural units. The interior of the hollow casing is divided into two upper and lower semicircular ring layer cavities, and the upper and lower semicircular ring layer cavities are filled with liquid metal; liquid metal-based magnetic fluid is filled between the casing and the motor stator, and sealing rings are arranged at the axial ends where the stator core and the internal honeycomb structure are in contact.

2. The liquid metal-based vibration suppression and noise reduction cooling motor structure according to claim 1, characterized in that: The filling amount of the liquid metal is 80-95% of the cavity capacity of the upper and lower semicircular ring layers, preferably 95%; the liquid metal is a sodium-potassium alloy.

3. The liquid metal-based vibration suppression and noise reduction cooling motor structure according to claim 1, characterized in that: The external honeycomb structure extends toward the outside of the motor to increase the contact area between the casing and the outside air; the internal honeycomb structure extends toward the inside of the casing to increase the contact area between the casing and the liquid metal-based magnetic fluid.

4. The liquid metal-based vibration suppression and noise reduction cooling motor structure according to claim 1, characterized in that: The filling method of the liquid metal-based magnetic fluid is as follows: the entire casing is placed in a liquid metal-based magnetic fluid pool under a certain air pressure environment, and then the stator is pressed into the casing from one side in an interference fit or transition fit manner, so that the stator is located in the center of the casing. Due to the close fit between the casing and the stator, the liquid metal-based magnetic fluid is filled and enclosed between the internal honeycomb structure and the outer surface of the stator.

5. The liquid metal-based vibration suppression and noise reduction cooling motor structure according to claim 1, characterized in that: The stator core is shorter than the casing in the axial direction, the honeycomb structure on the inner surface of the casing is equal in length to the stator core in the axial direction, and there is no honeycomb structure at both ends inside the casing.

6. The liquid metal-based vibration suppression and noise reduction cooling motor structure according to claim 1, characterized in that: The sealing ring is made of a high temperature resistant, corrosion resistant and leakproof resin material, and the resin material is a phenolic resin or a polyvinyl chloride resin.

7. The liquid metal-based vibration suppression and noise reduction cooling motor structure according to claim 1, characterized in that: The honeycomb structure inside the casing is made of elastic alloy material, which improves the vibration reduction capability and enables the liquid metal-based magnetic fluid to fully contact with the outside of the stator.

Images