Heat dissipation structure of driving device

Abstract

The invention discloses a heat dissipation structure of a driving device, and relates to the technical field of driving equipment. The driving device heat dissipation structure comprises a machine shell, an inner cavity defined by the machine shell is used for installing a driving assembly, heat dissipation fins are fixedly arranged on the outer surface of the machine shell, a first cooling cavity is formed in the heat dissipation fins, and a thermosyphon heat dissipation working medium is contained in the first cooling cavity. According to the heat dissipation structure of the driving device, the heat dissipation area is enlarged by means of the heat dissipation fins, meanwhile, the first cooling cavities are additionally arranged in the heat dissipation fins, the thermosyphon heat dissipation working media are contained in the first cooling cavities, the working media can be subjected to automatic phase change and flow, heat is rapidly taken away from the inner cavity, the heat dissipation speed is increased, and the heat dissipation capacity of the motor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drive equipment, and in particular to a heat dissipation structure of a drive device. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy, which drives other devices by generating kinetic energy. In a motor, iron loss and copper loss are the two main efficiency loss factors. The iron core or rotor inside the motor is provided with a copper conductor coil (enameled wire), and the copper conductor has a certain resistance. Therefore, when power is turned on, part of the electrical energy will be lost due to resistance, and part of the electrical energy will be dissipated in the form of heat energy due to hysteresis and eddy current effects caused by the iron core material and structure.

[0003] An existing heat dissipation structure is to set heat dissipation fins on the motor to increase the heat dissipation area, but its heat dissipation capacity is difficult to meet the demand.

[0004] Therefore, how to improve the heat dissipation capability is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a heat dissipation structure of a driving device with good heat dissipation capability.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A heat dissipation structure for a drive device comprises a casing, wherein an inner cavity enclosed by the casing is used to install a drive component, heat dissipation fins are fixedly arranged on the outer surface of the casing, a first cooling cavity is defined in the heat dissipation fins, and a thermosiphon heat dissipation medium is contained in the first cooling cavity.

[0008] Preferably, the heat dissipation fins extend along the axial direction of the housing.

[0009] Preferably, the plurality of heat dissipation fins are arranged in sequence along the circumference of the housing.

[0010] Preferably, all the heat dissipation fins are divided into a plurality of non-overlapping heat dissipation groups along the circumferential direction, and the heat dissipation fins in the same heat dissipation group are arranged in parallel.

[0011] Preferably, a second cooling cavity connected to each of the first cooling cavities is provided in the shell wall of the shell, and the second cooling cavity and the first cooling cavity together contain a thermosyphon heat dissipation medium.

[0012] Preferably, the second cooling cavity comprises an annular cavity provided in a peripheral wall of the housing.

[0013] Preferably, a surface of the first cooling cavity and / or a surface of the second cooling cavity is provided with a supporting portion which is concave or convex relative thereto.

[0014] Preferably, a heat exchanger is further included, and the heat exchanger is connected to the second cooling chamber.

[0015] Preferably, the heat exchanger is connected to the second cooling chamber via a plurality of siphon conduits sequentially arranged along the circumferential direction.

[0016] Preferably, the heat exchanger and the casing are arranged in sequence along the axial direction.

[0017] The heat dissipation structure of the drive device provided by the present invention comprises a housing, wherein the inner cavity surrounded by the housing is used to install the drive assembly, the outer surface of the housing is fixedly provided with heat dissipation fins, the heat dissipation fins are provided with a first cooling cavity, and the first cooling cavity contains a thermosiphon heat dissipation medium

[0018] In the heat dissipation structure of the drive device, the heat dissipation area is expanded with the help of heat dissipation fins. At the same time, a first cooling cavity is added in the heat dissipation fins, and the first cooling cavity contains a thermal siphon heat dissipation medium. The medium can automatically change phase and flow, quickly taking the heat away from the inner cavity, accelerating the heat dissipation speed, and improving the heat dissipation capacity of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 It is an isometric view of a specific embodiment 1 of the heat dissipation structure of the driving device provided by the present invention;

[0021] Figure 2 A full cross-sectional front view of a specific embodiment 1 of the heat dissipation structure of the drive device provided by the present invention;

[0022] Figure 3 for Figure 2 AA section view;

[0023] Figure 4 for Figure 3 Enlarged view of point B.

[0024] Reference numerals:

[0025] Casing 1, second cooling chamber 11, inner chamber 12;

[0026] Heat dissipation fins 2, a first cooling chamber 21;

[0027] Driving assembly 3, winding 31, iron core 32, rotor 33, bearing 34, magnetic circuit 35;

[0028] Heat exchanger 4 , siphon conduit 41 . DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0030] The core of the present invention is to provide a heat dissipation structure of a driving device with good heat dissipation capability.

[0031] The specific embodiment 1 of the heat dissipation structure of the driving device provided by the present invention is applied to a motor. In other embodiments, it can also be applied to other driving devices that need to dissipate heat during operation, such as an electromagnet. Figures 1 to 4 The heat dissipation structure of the driving device includes a housing 1, and an inner cavity 12 surrounded by the housing 1 is used to install the driving component 3. Figure 2 As shown, the drive assembly 3 includes a winding 31 (enameled wire), an iron core 32, a rotor 33, a bearing 34 and other structures. Accordingly, a bearing seat, an iron core slot and other structures are provided on the inner cavity 12 to install the drive assembly 3, wherein the rotor 33 needs to be positioned at both ends through the bearing 34 and connected to the inner cavity 12, and the rotation center line of the rotor 33 is the rotation center line of the drive assembly 3. When the drive assembly 3 is running, it is energized to form a magnetic circuit 35 and drive the rotor 33 to rotate to generate kinetic energy, and heat is generated during the operation, such as Figure 2 As shown, the heat diffusion direction includes a dotted arrow indicating the heat diffusion direction. The axial, circumferential and radial directions of the housing 1 are based on the rotation centerline of the drive assembly 3 installed or to be installed in the inner cavity 12.

[0032] The outer surface of the housing 1 is fixed with heat dissipation fins 2, which can expand the heat dissipation area and improve the heat dissipation effect. A first cooling cavity 21 is provided in the heat dissipation fins 2, and the first cooling cavity 21 contains a thermosiphon heat dissipation working fluid (hereinafter referred to as the working fluid). The working fluid can be methanol, acetone or other suitable working fluids as needed. By optimizing the ratio and design of the working fluid filling amount, the normal and efficient operation of the motor can be ensured to achieve the best heat exchange effect. The working fluid can use the thermosiphon principle to quickly take the heat away from the inner cavity 12 to achieve efficient heat transfer.

[0033] During the operation of the drive assembly 1, the surface of the inner cavity 12 is a high-temperature wall, which absorbs and transfers the heat released by the drive assembly 1 to the outside, and evenly transfers the local hot spots to the working fluid. The working fluid will boil and evaporate, and condense through the contact with the air through the heat sink fins 2, completing the heat transfer process. The condensate returns to the direction of the inner cavity 12 and can continue to absorb heat. With the help of thermal siphoning ability, the heat transfer efficiency can be improved, so that a large amount of heat can be quickly transferred, which is suitable for the conditions of high-speed operation of the drive assembly and small temperature difference between the inside and outside of the casing 1.

[0034] The heat dissipation structure of the drive device in this embodiment can expand the heat dissipation area with the help of the heat dissipation fins 2, and dissipate heat through natural convection or forced convection. On this basis, a first cooling chamber 21 is added to the heat dissipation fins 2, and the first cooling chamber 21 contains a thermal siphon heat dissipation medium. The medium can automatically change phase and flow, and quickly take the heat away from the inner cavity 12, thereby accelerating the heat dissipation speed and improving the heat dissipation capacity of the motor.

[0035] Furthermore, for the arrangement of the heat sink fins 2, as Figure 3 As shown, the heat sink fins 2 extend along the axial direction of the housing 1. Since the housing 1 is an annular structure in the circumferential direction, the heat sink fins 2 are arranged as a linear sheet structure or a plate structure extending in the axial direction for easy processing. In other embodiments, the heat sink fins 2 can also be arranged as an arc structure arranged around the housing 1 in the circumferential direction.

[0036] In addition, a plurality of heat sink fins 2 are arranged in sequence along the circumference of the housing 1. Specifically, the heat sink fins 2 may be distributed throughout the housing 1. For example, a heat sink fin 2 is arranged at every set angle in the circumference. Figure 3 When the housing 1 is placed horizontally in the axial direction, the working fluid evaporates and moves upward. The working fluid in the heat sink fins 2 on the upper side of the inner cavity 12 can be cooled by the thermal siphon principle, while the heat sink fins 2 on the lower side of the inner cavity 12 may not be able to be cooled by the thermal siphon principle. Based on the circumferential arrangement of different heat sink fins 2 in this embodiment, the constraints on the placement direction of the housing 1 can be reduced. Figure 3 The housing 1 can be rotated 360° at any angle, and the working medium can be used to dissipate heat by thermal siphoning, which is more flexible to use. Of course, in other embodiments, the housing 1 is not limited to being placed horizontally in the axial direction, and can also have an inclination relative to the horizontal.

[0037] Specifically, all the heat dissipation fins 2 are divided into a plurality of non-overlapping heat dissipation groups along the circumferential direction, such as Figure 3As shown, it is divided into 4 heat dissipation groups in the circumferential direction, namely heat dissipation group C, heat dissipation group D, heat dissipation group E and heat dissipation group F. In the same heat dissipation group, each heat dissipation fin 2 is arranged in parallel, which can reduce the processing difficulty and can reduce the processing difficulty of the heat dissipation fin 2, and the direction of the heat dissipation fin 2 can predict the direction of the housing 1, reducing the assembly difficulty of the housing 1. Of course, in other embodiments, on the cross section perpendicular to the axial direction, each heat dissipation fin 2 can also extend radially, that is, the center line of the heat dissipation fin 2 passes through the rotation center line of the rotor 33.

[0038] Furthermore, if Figure 3 and Figure 4 As shown, a second cooling cavity 11 connected to each first cooling cavity 21 is also provided in the shell wall of the housing 1. The second cooling cavity 11 and the first cooling cavity 21 contain a thermosiphon heat dissipation medium together. Specifically, the second cooling cavity 11 and the first cooling cavity 21 can be evacuated and then filled with an appropriate amount of medium. Since the second cooling cavity 11 is closer to the inner cavity 12, the heat dissipation capacity can be further improved.

[0039] Specifically, Figure 3 As shown, the second cooling chamber 11 includes an annular chamber provided in the peripheral wall of the housing 1. The working medium in the annular chamber can absorb heat at any position in the circumferential direction to ensure that the local hot spot is evenly transferred to the working medium. After the working medium is heated and evaporated, it can also flow freely to the first cooling chamber 21 with a suitable orientation, for example Figure 3 In this direction, the working fluid evaporates and flows upward to the first cooling chamber 21 of the C heat dissipation group to quickly dissipate heat by means of thermal siphon effect. Of course, in other embodiments, the second cooling chamber 11 may also include an axial end chamber arranged in the axial end wall of the housing 1.

[0040] Preferably, a support portion that is concave or convex relative to the surface of the first cooling cavity 21 and / or the surface of the second cooling cavity 11 is additionally provided. Specifically, a dense concave-convex structure, a corrugated plate, etc. may be added. For example, the support portion includes a plurality of cylinders arranged in the annular cavity and located on the radial inner side surface of the annular cavity, so that the surface surrounding the first cooling cavity 21 or the second cooling cavity 11 is uneven, thereby increasing the area in contact with the working medium, promoting heat transfer, and enhancing the heat transfer effect.

[0041] Furthermore, if Figure 1 and Figure 2As shown, the heat dissipation structure of the drive device also includes a heat exchanger 4. The heat exchanger 4 is a device for transferring heat. The heat exchanger 4 transfers heat to the cooling medium through the contact between the heat medium and the cooling medium to achieve efficient heat transfer. The heat exchanger 4 is connected to the second cooling chamber 11. Specifically, the heat exchanger 4, the first cooling chamber 21 and the second cooling chamber 11 form a two-phase closed working medium flow channel. By combining the thermal siphon structure and the heat exchanger, the working medium is cooled by means of the heat exchanger 4, and the heat is dissipated in conjunction with the thermal siphon effect, forming two independent and composite dual-path heat dissipation mechanisms, which more efficiently solve the heat dissipation problem of the motor, enhance the transfer and dispersion of heat, more effectively discharge heat from the equipment, reduce the temperature gradient, improve the heat dissipation effect, prevent the motor from overheating, and improve the stability and reliability of the motor.

[0042] Specifically, Figure 1 As shown, the heat exchanger 4 is connected to the second cooling chamber 11 through a plurality of siphon conduits 41 arranged in sequence along the circumferential direction, for example, four siphon conduits, which can improve the heat exchange efficiency between the working medium and the heat exchanger 4. At the same time, according to the placement direction of the casing 1, different siphon conduits 41 can be used to introduce or export the working medium to the second cooling chamber 11, such as Figure 1 In the embodiment, the evaporated working fluid can enter the heat exchanger 4 through the two upper siphon conduits 41 , and after being condensed by the heat exchanger 4 after heat dissipation, the two lower siphon conduits 42 can discharge the condensed low-temperature working fluid back to the second cooling chamber 11 .

[0043] Specifically, Figure 2 As shown, the heat exchanger 4 and the housing 1 are arranged in sequence along the axial direction, and the heat exchanger 4 will not block the heat dissipation of the heat dissipation fins 2 on the peripheral surface of the housing 1.

[0044] The heat dissipation structure of the drive device in the present invention has the following beneficial effects:

[0045] Improve heat dissipation efficiency: The combination of the thermosiphon phenomenon and the heat exchanger improves the heat transfer efficiency through the thermosiphon phenomenon of natural flow and the heat exchange between the heat medium and the cooling medium in the heat exchanger 4.

[0046] Save energy consumption: Since thermosiphon works based on the principle of natural flow and does not require additional energy input, it can reduce electricity consumption and carbon emissions. It does not rely on forced convection cooling of external energy sources, which can save energy consumption.

[0047] Reduce temperature gradients: Helps to evenly distribute temperature and reduce temperature gradients within the device. This helps to reduce thermal stress and heat loss, and improve the stability and life of the device.

[0048] Reduced thermal resistance: Minimizing the thermal resistance of heat sink fin 2 helps transfer heat more efficiently and improves overall cooling performance.

[0049] Simplify system design: It can save space, reduce the number and complexity of equipment, thereby simplifying the layout and engineering design of the system. It can be used in combination with rotating machinery or drive devices at will, which is of great significance for many application fields such as electronic equipment heat dissipation and industrial cooling.

[0050] Improve system reliability: Reduce dependence on mechanical equipment and energy, reduce failure rate, and help maintain stable operation of the system and improve system reliability.

[0051] It should be noted that when an element is referred to as "fixed" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element in the middle. In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", "multiple groups" mean two or more.

[0052] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0055] The above is a detailed introduction to the heat dissipation structure of the drive device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A heat dissipation structure of a driving device, characterized in that: The invention comprises a casing (1), wherein an inner cavity (12) enclosed by the casing (1) is used for installing a drive assembly (3), a heat dissipation fin (2) is fixedly arranged on the outer surface of the casing (1), a first cooling cavity (21) is provided in the heat dissipation fin (2), and a thermosyphon heat dissipation medium is contained in the first cooling cavity (21).

2. The heat dissipation structure of the driving device according to claim 1, characterized in that: The heat dissipation fins (2) extend along the axial direction of the housing (1).

3. The heat dissipation structure of the driving device according to claim 1, characterized in that: The plurality of heat dissipation fins (2) are arranged in sequence along the circumference of the housing (1).

4. The heat dissipation structure of the driving device according to claim 3, characterized in that: All the heat dissipation fins (2) are divided into a plurality of non-overlapping heat dissipation groups along the circumferential direction, and the heat dissipation fins (2) in the same heat dissipation group are arranged in parallel.

5. The heat dissipation structure of the driving device according to any one of claims 1 to 4, characterized in that: A second cooling cavity (11) is provided in the shell wall of the housing (1) and is connected to each of the first cooling cavities (21); the second cooling cavity (11) and the first cooling cavity (21) together contain a thermosyphon heat dissipation medium.

6. The heat dissipation structure of the driving device according to claim 5, characterized in that: The second cooling chamber (11) comprises an annular chamber arranged in the peripheral wall of the casing (1).

7. The heat dissipation structure of the driving device according to claim 5, characterized in that: The surface of the first cooling cavity (21) and / or the surface of the second cooling cavity (11) is provided with a support portion which is concave or convex relative thereto.

8. The heat dissipation structure of the driving device according to claim 5, characterized in that: It also comprises a heat exchanger (4), wherein the heat exchanger (4) is connected to the second cooling chamber (11).

9. The heat dissipation structure of the driving device according to claim 8, characterized in that: The heat exchanger (4) is connected to the second cooling chamber (11) via a plurality of siphon conduits (41) arranged sequentially along the circumferential direction.

10. The heat dissipation structure of the driving device according to claim 8, characterized in that: The heat exchanger (4) and the casing (1) are arranged in sequence along the axial direction.

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