Self-adaptive plate slot oil cooling motor structure based on phase change heat dissipation

Abstract

The invention discloses a self-adaptive plate slot oil cooling motor structure based on phase change heat dissipation, a plurality of self-adaptive plate slot oil cooling units are arranged in a cooling oil pipe, and each self-adaptive plate slot oil cooling unit comprises a self-adaptive multifunctional plate structure and a graphene capsule type phase collection groove. The self-adaptive multifunctional plate structure comprises a liquid-solid phase separation plate on the front side, an auxiliary platform and a maneuvering backup plate on the rear side, and the liquid-solid phase separation plate inclines from the inner wall of the cooling oil pipe to an inlet of the graphene phase collection groove and is distributed in a grid shape; an auxiliary platform is arranged at the middle upper part of the front side of the liquid-solid phase splitting plate, and a maneuvering backup plate is arranged at the rear side of the liquid-solid phase splitting plate; the upper end of the maneuvering backup plate is connected with the inner wall of the cooling oil pipe, the lower end of the maneuvering backup plate is connected with the liquid-solid phase separation plate on the front side, the lower end is as high as the auxiliary platform, and the auxiliary platform is parallel to the flowing direction of the cooling oil pipe. The heat absorption time of the phase change material is effectively prolonged, the running temperature fluctuation of the motor is reduced, and the heat dissipation effect and reliability of the motor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor cooling, and in particular to an adaptive plate-slot oil-cooled motor structure based on phase change heat dissipation, which is suitable for temperature control and thermal management of a high-power motor heat dissipation system. Background Art

[0002] With the widespread application of high-efficiency motors and high-power density motors in industries such as industry and transportation, the large amount of heat generated during their operation will seriously affect the efficiency, stability and service life of the motors. Traditional cooling methods include air cooling and liquid cooling. Although liquid cooling technology can achieve high heat dissipation efficiency, traditional liquid cooling systems only use the sensible heat conduction of cooling oil, which cannot fully cope with the peak fluctuations in thermal loads of high-power motors under continuous operation conditions. In addition, the temperature of the cooling oil fluctuates greatly during the heat absorption process, making it difficult to maintain the temperature balance of the system. Therefore, how to introduce more efficient thermal management methods into the liquid cooling system has become a bottleneck in the current technological development.

[0003] Phase change materials are becoming one of the important materials for solving such problems because they can absorb a large amount of latent heat during the phase change process and have excellent temperature control capabilities. However, how to optimize the distribution and flow characteristics of phase change materials in liquid cooling systems, give full play to their latent heat absorption capacity, and ensure efficient synergistic heat dissipation between cooling oil and phase change materials is a challenging technical issue. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an adaptive plate-slot oil-cooled motor structure based on phase change heat dissipation, by setting a graphene capsule-type phase-collecting groove and an adaptive multifunctional plate structure with flow velocity distribution characteristics in the cooling oil pipe, so as to improve the thermal conduction efficiency of the phase change material while prolonging its residence time in the high-heat area, maximize the latent heat absorption efficiency of the phase change material, and significantly improve the thermal management capability of the motor cooling system.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: An adaptive plate slot oil-cooled motor structure based on phase change heat dissipation includes a cooling oil pipe, in which a plurality of adaptive plate slot oil-cooling units are arranged, each adaptive plate slot oil-cooling unit includes an adaptive multifunctional plate structure and a section of graphene capsule phase-collecting groove, and the adaptive multifunctional plate structure is arranged at the inlet end of the graphene phase-collecting groove.

[0006] The adaptive multifunctional plate structure includes a front liquid-solid phase separation plate, an auxiliary platform and a rear mobile backup plate, wherein the liquid-solid phase separation plate is inclined from the inner wall of the cooling oil pipe to the entrance of the graphene phase collection groove and is distributed in a grid shape; an auxiliary platform is provided in the middle and upper part of the front side of the liquid-solid phase separation plate, and a mobile backup plate is provided on the rear side of the liquid-solid phase separation plate; the upper end of the mobile backup plate is connected to the inner wall of the cooling oil pipe, and the lower end is connected to the front liquid-solid phase separation plate, the height of the lower end is the same as that of the auxiliary platform, and the auxiliary platform is parallel to the flow direction of the cooling oil pipe.

[0007] The graphene capsule phase-collecting groove is arranged in sections on the axial inner wall of the lower part of the cooling oil pipe, and a plurality of irregular slow flow resistance beams are arranged inside, so that the inside of the graphene capsule phase-collecting groove is uneven, thereby increasing the flow resistance of the phase change material.

[0008] The slow flow resistance beam is in the shape of a candied haws-like protrusion, or a durian skin-like protrusion, or an irregular protrusion of uneven length.

[0009] The cooling oil pipe is connected to an external hydraulic pump and is used to pressurize a suspension of phase change heat dissipation material and cooling oil and send it into the cooling oil pipe. After the suspension is cooled by an external cooling circuit, it enters the system for circulation again to ensure a continuous and stable heat dissipation effect.

[0010] The phase change heat dissipation material is a sodium acetate trihydrate phase change particle material, or a magnesium nitrate tetrahydrate phase change particle material, preferably a sodium acetate trihydrate phase change particle material.

[0011] The outer wall of the cooling oil pipe is coated with a graphene coating with high thermal conductivity. Graphene has an extremely high thermal conductivity coefficient, which can significantly accelerate the transfer of heat from the motor stator to the outside of the cooling oil pipe. At the same time, graphene can also effectively improve the efficiency of heat conduction in the cooling oil to the outside of the cooling oil pipe, further enhancing the heat dissipation capacity of the motor.

[0012] The cooling oil pipe surrounds the outside of the motor stator and is arranged along the surface of the motor stator, which is a rubber tube structure; or the cooling oil pipe surrounding the casing is dug out in a thicker casing, which is a hole structure of the casing itself.

[0013] The innovative designs of the structures in the present invention are as follows: A. Structural design of cooling oil pipe: In the present invention, the cooling oil pipe has two innovative designs: ① The cooling oil pipe surrounds the outside of the motor stator and is arranged along the surface of the motor stator, which is a rubber tube structure; ② The cooling oil pipe surrounding the casing is dug out in a thicker casing, which is a hole structure of the casing itself.

[0014] In the above two designs, the cooling oil pipes are evenly arranged along the surface of the motor stator to ensure that the cooling oil and the phase change material suspension are fully in contact and absorb the heat generated during the operation of the stator.

[0015] B. Structural design of graphene capsule-type phase-collecting grooves and candied haws-shaped slow-flow resistance beams: The graphene capsule phase-collecting groove is arranged in sections on the axial inner wall of the lower part of the cooling oil pipe, and a plurality of irregular slow flow resistance beams are arranged inside, so that the inside of the graphene capsule phase-collecting groove is uneven, thereby increasing the flow resistance of the phase change material.

[0016] The present invention uses a unique structural design to adjust the flow rate of the phase change material by setting a graphene capsule-type phase collection groove. According to the principles of fluid mechanics, the flow resistance in the groove area is relatively large, and the flow velocity distribution characteristics are similar to the distribution law of water flow velocity in a river - the water flow velocity is slower near the river bank, while the water flow in the middle is faster. At the same time, irregular slow-flow resistance beams are designed on both sides of the inner wall of each graphene capsule-type phase collection groove, making the two sides uneven, increasing the flow resistance of the phase change material. This design can effectively slow down the flow rate of cooling oil and phase change material particles in the groove, making the phase change material easier to settle and gather in the groove. By reducing the flow rate, the residence time of the phase change material particles in the groove is prolonged, thereby enhancing the latent heat absorption time of the phase change material, ensuring the stable heat dissipation performance of the motor during long-term operation.

[0017] C. Innovative design of adaptive multifunctional board structure: The adaptive multifunctional plate structure includes a front liquid-solid phase separation plate, an auxiliary platform and a rear mobile backup plate, wherein the liquid-solid phase separation plate is inclined from the inner wall of the cooling oil pipe to the entrance of the graphene phase collection groove and is distributed in a grid shape; an auxiliary platform is provided in the middle and upper part of the front side of the liquid-solid phase separation plate, and a mobile backup plate is provided on the rear side of the liquid-solid phase separation plate; the upper end of the mobile backup plate is connected to the inner wall of the cooling oil pipe, and the lower end is connected to the front liquid-solid phase separation plate, the height of the lower end is the same as that of the auxiliary platform, and the auxiliary platform is parallel to the flow direction of the cooling oil pipe.

[0018] 1. On the one hand, the liquid-solid phase separation plate guides the sodium acetate trihydrate particles into the groove, and on the other hand, allows the sodium acetate trihydrate material that has absorbed heat and turned into liquid to flow out smoothly and transfer heat through the liquid-solid phase separation plate, avoiding the accumulation of phase change particles in the groove and ensuring the continuity of the coolant flow.

[0019] 2. The auxiliary platform makes the sodium acetate trihydrate particles gather on the platform when flowing. When the oil pipe temperature is lower than the transformation temperature of the mobile backup plate, even if the sodium acetate trihydrate particles gather on the platform, there are relatively full phase change particles in the mobile bin, so the original phase change particles in the oil pipe will not enter the mobile bin. When accumulated to a certain extent, they can flow downward smoothly and then flow smoothly into the subsequent grooves in the oil pipe.

[0020] When the oil pipe temperature is higher than the transformation temperature of the mobile backup plate, the phase change particles in the mobile cabin enter the oil pipe, and the adaptive multifunctional plate structure is equivalent to a simple liquid-solid phase separation plate, and the platform has no obvious impact.

[0021] When the oil pipe temperature drops below the transformation temperature again, the mobile backup plate and the liquid-solid phase separation plate are closed, and the auxiliary platform helps to gather the phase change particles in the oil pipe on the auxiliary platform and then push them into the mobile cabin, assisting in the recovery of mobile particles in the oil pipe at low temperatures.

[0022] 3. The mobile support plate at the rear is made of memory metal (such as nickel-titanium alloy) and is adapted to the phase change temperature of the phase change material; the mobile support plate is located at the rear side of the liquid-solid phase separation plate, with the upper end connected to the inner wall of the oil pipe and the lower end connected to the liquid-solid phase separation plate at the front, and its height is the same as that of the auxiliary platform.

[0023] When the temperature is lower than the transformation temperature, the mobile backup plate and the liquid-solid phase separation plate fit completely together, forming a space similar to a triangular prism, which is the mobile warehouse. When designing the oil pipe, a certain amount of phase change material sodium acetate trihydrate particles are placed in this space.

[0024] When the temperature is higher than the transformation temperature, the mobile support plate shrinks and shortens, and the lower end separates from the liquid-solid phase separation plate, and the angle changes, moving away from the liquid-solid phase separation plate, so that the phase change particles in the mobile compartment enter the oil pipe, increasing the number of phase change particles in the oil pipe, thereby enhancing the heat absorption and heat dissipation capacity of the motor.

[0025] When the temperature is lower than the transformation temperature again, the mobile backup plate extends and changes its angle to approach the liquid-solid phase separation plate, and closes with the liquid-solid phase separation plate to form a mobile chamber. With the assistance of the auxiliary platform, the phase change material particles are collected again, thereby realizing the recovery of the mobile particles in the oil pipe at low temperature.

[0026] D. Design and use of graphene materials: In order to further improve the overall heat dissipation performance of the system, the grooves of each unit are made of graphene material with high thermal conductivity, and a layer of graphene coating with high thermal conductivity is applied to the outer wall of the cooling oil pipe. Graphene has an extremely high thermal conductivity coefficient, which can significantly accelerate the transfer of heat from the motor stator to the outside of the cooling pipe. At the same time, graphene can also effectively improve the efficiency of heat conduction from the cooling oil to the outside of the oil pipe, further enhancing the heat dissipation capacity of the motor.

[0027] E. Hydraulic pump and cooling circuit design The cooling oil pipe of the present invention is connected to an external hydraulic pump, and is used to pressurize and feed the suspension of sodium acetate trihydrate and cooling oil into the cooling oil pipe. During operation, the hydraulic pump not only maintains efficient circulation of the cooling oil, but also ensures that the suspension forms a uniform flow pattern outside the motor stator. In addition, after passing through the cooling circuit, the suspension is cooled by the cooling device and re-enters the system for circulation, ensuring a continuous and stable heat dissipation effect.

[0028] F. Phase change characteristics of phase change material sodium acetate trihydrate: As a phase change material, sodium acetate trihydrate has excellent latent heat absorption performance, and its melting point is about 58°C. When the motor is running at high load, when the cooling oil temperature rises to its phase change temperature, the sodium acetate trihydrate particles will melt quickly and absorb a large amount of latent heat, thereby maintaining the stability of the cooling oil temperature. This design effectively reduces the peak temperature of the motor, prevents overheating, and significantly improves the reliability and life of the motor. Since sodium acetate trihydrate is not easily soluble in oil, it can avoid the occurrence of overcooling, ensuring that the heat conduction efficiency of the heat dissipation system is always maintained at a high level.

[0029] The positive beneficial effects of the present invention are as follows: 1. Significantly improve heat dissipation efficiency: By mixing sodium acetate trihydrate particles with cooling oil and using the unique design of the cooling oil pipe, the heat dissipation capacity around the motor stator is significantly improved. Phase change materials use latent heat in the heat absorption process to greatly improve heat dissipation efficiency.

[0030] 2. Significantly prolong the residence time of phase change materials: Through the innovative design of graphene capsule phase collection grooves and adaptive multifunctional plate structure, the flow rate of phase change materials is slowed down, the residence time of phase change materials in high-temperature areas is prolonged, and its latent heat absorption function is fully utilized to enhance the cooling effect.

[0031] 3. Strong thermal management stability: The liquid-solid phase separation plate and the mobile backup plate automatically adjust the release and recovery of the phase change material according to temperature changes, ensuring the continuous and efficient operation of the system under different temperature conditions.

[0032] 4. Optimization of material thermal conductivity: The use of graphene materials further improves the thermal conductivity of the system, accelerates the efficiency of heat transfer from the cooling oil to the outside, and ensures long-term and efficient heat dissipation of the motor.

[0033] 5. High circulation reliability: The design of the adaptive multifunctional board structure not only prevents the blockage of phase change particles, but also maintains smooth circulation of the system and improves the reliability of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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 schematic diagram of the structure of a single adaptive plate slot oil cooling unit in the present invention; Figure 2 for Figure 1 A front view of Figure 3 A schematic structural diagram showing the direction of cooling oil in the cooling oil pipe of the present invention; Figure 4 It is a structural schematic diagram of the cooling oil pipe in the present invention from the perspective of cooling oil; Figure 5 This is a schematic diagram of the structure of the present invention (two adaptive plate slot oil cooling units are shown in the figure) Figure 6 It is a schematic diagram of the structure in which the cooling oil pipe surrounds the outside of the motor stator in the present invention.

[0035] In the accompanying drawings: 1--cooling oil pipe is away from the inner wall of the stator side, 2--cooling oil pipe is close to the inner wall of the stator side, 3--liquid-solid phase separation plate, 4--graphene capsule phase collecting groove, 5--graphene coating, 6--auxiliary platform, 7--mobile backup plate, 8--mobile cabin, 9--slow flow resistance beam. DETAILED DESCRIPTION

[0036] 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.

[0037] Example 1: Reference Figure 1 to Figure 6 An adaptive plate slot oil-cooled motor structure based on phase change heat dissipation includes a cooling oil pipe, in which a plurality of adaptive plate slot oil-cooling units are arranged, each adaptive plate slot oil-cooling unit includes an adaptive multifunctional plate structure and a section of graphene capsule phase collection groove 4, and the adaptive multifunctional plate structure is arranged at the inlet end of the graphene phase collection groove 4.

[0038] The adaptive multifunctional plate structure includes a front liquid-solid phase separation plate 3, an auxiliary platform 6 and a rear mobile backup plate 7. The liquid-solid phase separation plate 3 is inclined from the inner wall 1 of the cooling oil pipe to the entrance of the graphene phase collection groove 4 and is distributed in a grid shape. The auxiliary platform 6 is arranged in the middle and upper part of the front side of the liquid-solid phase separation plate, and the mobile backup plate 7 is arranged on the rear side of the liquid-solid phase separation plate. The upper end of the mobile backup plate 7 is connected to the inner wall 1 of the cooling oil pipe away from the stator side, and the lower end is connected to the front liquid-solid phase separation plate 3. The height of the lower end is the same as that of the auxiliary platform 6, and the auxiliary platform 6 is parallel to the flow direction of the cooling oil pipe.

[0039] The graphene capsule phase collecting groove 4 is arranged in sections on the axial inner wall of the lower part of the cooling oil pipe, and a plurality of irregular slow flow resistance beams 9 are arranged inside. The slow flow resistance beams 9 are shaped like candied haws-like protrusions, making the inside of the graphene capsule phase collecting groove 4 uneven, thereby increasing the flow resistance of the phase change material.

[0040] The cooling oil pipe is connected to an external hydraulic pump and is used to pressurize the suspension of phase change heat dissipation material and cooling oil and send it into the cooling oil pipe. After the suspension is cooled through the external cooling circuit, it enters the system for circulation again to ensure a continuous and stable heat dissipation effect.

[0041] The outer wall of the cooling oil pipe is coated with a graphene coating 5 with high thermal conductivity. Graphene has an extremely high thermal conductivity coefficient, which can significantly accelerate the transfer of heat from the motor stator to the outside of the cooling oil pipe. At the same time, graphene can also effectively improve the efficiency of heat conduction in the cooling oil to the outside of the cooling oil pipe, further enhancing the heat dissipation capacity of the motor.

[0042] The cooling oil pipe surrounds the outside of the motor stator and is arranged along the surface of the motor stator, and is a rubber tube structure.

[0043] Embodiment 2: The structure of this embodiment is basically the same as that of Embodiment 1, and the similarities are not repeated. The difference is that the cooling oil pipe is dug out in a thicker casing and is a hole-through structure of the casing itself.

[0044] 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.

[0045] In the present invention, all terms related to directions such as "front", "rear", "left", "right", "up", "down", "inside" and "outside" are intended to explain the structure and technical solutions of the present invention, but do not limit the structure and technical solutions of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0046] 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. An adaptive plate slot oil cooling motor structure based on phase change heat dissipation, including a cooling oil pipe, characterized in that: A plurality of adaptive plate slot oil cooling units are arranged in the cooling oil pipe, each adaptive plate slot oil cooling unit comprises an adaptive multifunctional plate structure and a section of graphene capsule phase collecting groove, and the adaptive multifunctional plate structure is arranged at the inlet end of the graphene phase collecting groove.

2. The adaptive plate slot oil cooling motor structure based on phase change heat dissipation according to claim 1 is characterized in that: The adaptive multifunctional plate structure includes a front liquid-solid phase separation plate, an auxiliary platform and a rear mobile backup plate, wherein the liquid-solid phase separation plate is inclined from the inner wall of the cooling oil pipe to the entrance of the graphene phase collection groove and is distributed in a grid shape; an auxiliary platform is provided in the middle and upper part of the front side of the liquid-solid phase separation plate, and a mobile backup plate is provided on the rear side of the liquid-solid phase separation plate; the upper end of the mobile backup plate is connected to the inner wall of the cooling oil pipe, and the lower end is connected to the front liquid-solid phase separation plate, the height of the lower end is the same as that of the auxiliary platform, and the auxiliary platform is parallel to the flow direction of the cooling oil pipe.

3. The adaptive plate slot oil cooling motor structure based on phase change heat dissipation according to claim 2 is characterized in that: The graphene capsule phase-collecting groove is arranged in sections on the axial inner wall of the lower part of the cooling oil pipe, and a plurality of irregular slow flow resistance beams are arranged inside, so that the inside of the graphene capsule phase-collecting groove is uneven, thereby increasing the flow resistance of the phase change material.

4. The adaptive plate slot oil cooling motor structure based on phase change heat dissipation according to claim 1 is characterized in that: The cooling oil pipe is connected to an external hydraulic pump and is used to pressurize a suspension of phase change heat dissipation material and cooling oil and send it into the cooling oil pipe. After the suspension is cooled by an external cooling circuit, it enters the system for circulation again to ensure a continuous and stable heat dissipation effect.

5. The adaptive plate slot oil cooling motor structure based on phase change heat dissipation according to claim 4 is characterized in that: The phase change heat dissipation material is a sodium acetate trihydrate phase change granular material, or a magnesium nitrate tetrahydrate phase change granular material, preferably a sodium acetate trihydrate phase change granular material.

6. The adaptive plate slot oil cooling motor structure based on phase change heat dissipation according to claim 1 is characterized in that: The outer wall of the cooling oil pipe is coated with a graphene coating with high thermal conductivity. Graphene has an extremely high thermal conductivity coefficient, which can significantly accelerate the transfer of heat from the motor stator to the outside of the cooling oil pipe. At the same time, graphene can also effectively improve the efficiency of heat conduction in the cooling oil to the outside of the cooling oil pipe, further enhancing the heat dissipation capacity of the motor.

7. The adaptive plate slot oil cooling motor structure based on phase change heat dissipation according to claim 1 is characterized in that: The cooling oil pipe surrounds the outside of the motor stator and is arranged along the surface of the motor stator, which is a rubber tube structure; or the cooling oil pipe surrounding the casing is dug out in a thicker casing, which is a hole structure of the casing itself.

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