Air-cooled linear motor

Abstract

The invention discloses an air-cooled linear motor. The air-cooled linear motor comprises a motor secondary and a motor primary, the motor primary comprises a mounting seat, a lamination group and a plurality of split bolts which are tightly attached to the side part of the lamination group; a plurality of convex parts are also arranged at the side part of the lamination group; a plurality of coils are correspondingly arranged on the plurality of convex parts respectively; at least one end of the top or the bottom of the lamination set is tightly attached to an air cooling assembly, and a plurality of split bolts penetrate through the air cooling assembly. The air cooling assembly is tightly attached to at least one end of the top or the bottom of the lamination group in the motor primary, so that heat generated by the lamination group and the coil in the motor primary can be quickly conducted to the air cooling assembly, and the air cooling assembly takes away the heat, conducted by the lamination group and the coil, on the air cooling assembly by generating wind power. The problem of difficulty in heat dissipation in the motor primary is solved, the high requirement of the high-power permanent magnet synchronous linear motor on heat dissipation is met, and the working condition requirement that the linear motor can be applied to a movable primary and a fixed secondary is met.

Description

Technical Field

[0001] The invention belongs to the technical field of linear motors, and specifically relates to an air-cooled linear motor. Background Art

[0002] Currently, in the field of high-power permanent magnet synchronous linear motors, the main heat dissipation methods mainly focus on external air-cooling methods and internal water-cooling methods. The external air-cooling method accelerates the motor heat dissipation by natural cooling or adding a heat dissipation fan outside the secondary of the motor to strengthen the external air circulation. The internal water-cooling method is to add a water-cooling pipe or a water-cooling tank structure inside the secondary of the linear motor, so as to achieve the effect of rapid cooling of the motor.

[0003] In the related art, in a high-power iron-core linear motor adopting the external air-cooling method, in order to prevent the leakage problem caused by the winding breakage, an insulating board is usually assembled outside the winding. However, the external air-cooling can only obtain a certain cooling effect on the outer side of the insulating board outside the winding due to the air flow. Due to the poor heat conduction performance of the insulating board, the heat generated by the lamination and the coil inside the motor primary cannot be effectively conducted out in time, resulting in the heat accumulation inside the motor primary, seriously affecting the use performance and efficiency of the high-power permanent magnet synchronous linear motor. In addition, in the internal water-cooling method, although the refrigeration effect is direct and rapid, since this method depends on the strict sealing of the water-cooling pipe, once the water-cooling pipe breaks, it will directly cause the coil short circuit. In addition, if the traditional embedded water-cooling method is adopted, when the primary moves follow-up, the water-cooling pipe needs to achieve flexible connection or the water-cooling equipment needs to be installed on the moving primary. Its internal structure is limited by the winding arrangement, resulting in a large number of elbows, bringing great difficulties in design, processing, movement, space and weight, and unable to meet the working conditions requirements that the linear motor can be applied to the moving primary and the fixed secondary.

[0004] Therefore, there is an urgent need for an air-cooled linear motor that can effectively take away the heat generated by the lamination and the coil inside the motor primary, ensure the heat dissipation requirements of the high-power permanent magnet synchronous linear motor, and at the same time meet the working conditions requirements that the linear motor can be applied to the moving primary and the fixed secondary. Summary of the Invention

[0005] The purpose of the invention is to provide an air-cooled linear motor to solve at least one of the problems and defects mentioned in the above background art.

[0006] Specifically, the invention discloses an air-cooled linear motor, including:

[0007] A motor secondary and a motor primary;

[0008] The motor primary includes a mounting seat, a stack of laminations, and a plurality of pairs of tie bolts arranged closely on the side of the stack of laminations;

[0009] A plurality of convex portions are further provided on the side of the lamination stack, and a plurality of coils are respectively provided corresponding to the plurality of convex portions;

[0010] At least one end of the top or bottom of the lamination stack is closely attached with an air-cooling component, and a plurality of the tie bolts are inserted through the air-cooling component.

[0011] The air-cooled linear motor according to the present invention has at least the following beneficial effects:

[0012] In this air-cooled linear motor, an air-cooling component is closely attached to at least one end of the top or bottom of the lamination stack in the motor primary, and the tie bolts are inserted through the air-cooling component to fix it to the lamination stack, so that the heat generated by the lamination stack and the coils in the motor primary can be quickly conducted to the air-cooling component. The air-cooling component generates wind to make the air flow quickly, taking away the heat conducted from the lamination stack and the coils on the air-cooling component; compared with the air-cooling method of the existing linear motor, it can bypass the insulating plate, prevent the insulating plate from blocking the air circulation, effectively solve the problem of difficult heat dissipation of the lamination stack and the coils inside the motor primary, avoid the demagnetization of materials or the degradation of performance caused by heat accumulation, thereby ensuring the stability of the motor operation and the thrust density, and meeting the high requirements for heat dissipation of high-power permanent magnet synchronous linear motors.

[0013] Moreover, the tie bolts not only play a role in fixing between the lamination stack and the air-cooling component, but also play a role in assisting the heat conduction of the lamination stack, which not only ensures the installation stability of the lamination stack and the air-cooling component, but also realizes the organic combination of structure and function, and greatly improves the compactness and reliability of the overall structure of the motor.

[0014] At the same time, compared with the water-cooling system, the linear motor by this air-cooling method does not require complex pipelines and coolant, making the structure of the motor primary simpler and lighter. Under the condition of a moving primary, the lighter weight of the motor primary can reduce the inertia during motor startup and operation, improve the response speed and motion accuracy of the motor, enable the motor to achieve linear motion more quickly and accurately, meet the application scenarios with high requirements for motion performance, and thus enable the linear motor to be applied to the condition requirements of a moving primary and a fixed secondary.

[0015] As a further solution of the present invention: the air-cooling components are closely attached to both the top and the bottom of the lamination stack.

[0016] Since the air-cooling components are closely attached to both the top and the bottom of the lamination stack, the heat generated by the lamination stack and the coils can be respectively conducted to the air-cooling components at the top and the bottom of the lamination stack, greatly increasing the heat conduction speed and the heat dissipation area of the lamination stack, effectively reducing the temperature of the linear motor, and ensuring the consistency of heat dissipation of the lamination stack and the coils, avoiding local overheating caused by uneven heat dissipation, and ensuring the stable operation of the linear motor in a suitable temperature environment.

[0017] As a further solution of the present invention: the air-cooling component includes a ventilation duct, and a fan is provided at one end of the ventilation duct.

[0018] As a further solution of the present invention: a substrate is provided at one end of the ventilation duct, the substrate is disposed close to the stack of laminations, and the tie bolts are passed through the side of the substrate.

[0019] As a further solution of the present invention: a fan flange is provided on the substrate, and the fan is connected to one end of the ventilation duct through the fan flange.

[0020] As a further solution of the present invention: a wind guiding cavity is provided in the ventilation duct, and a plurality of heat dissipation fins are provided on one side of the wind guiding cavity close to the substrate.

[0021] Since the air-cooling component includes a ventilation duct, a fan is provided at one end of the ventilation duct, a substrate is provided at one end of the ventilation duct, the substrate is disposed close to the stack of laminations, the tie bolts are passed through the side of the substrate, a fan flange is provided on the substrate, the fan is connected to one end of the ventilation duct through the fan flange, a wind guiding cavity is provided in the ventilation duct, and a plurality of heat dissipation fins are provided on one side of the wind guiding cavity close to the substrate; during the operation of the linear motor, a large amount of heat is generated in the stack of laminations and the coil in the primary of the motor. By closely attaching the substrate of the air-cooling component to the stack of laminations, the stack of laminations and the coil can quickly conduct the heat to the substrate, and the substrate conducts the heat to the plurality of heat dissipation fins in the wind guiding cavity, driving the fan to generate high-speed wind and blowing it into the ventilation duct, so that the air in the wind guiding cavity circulates quickly and takes away the heat on the substrate and the heat dissipation fins, thereby realizing the rapid cooling of the stack of laminations and the coil.

[0022] The design of closely attaching the substrate to the stack of laminations through tie bolts provides an efficient heat conduction path for the heat generated by the stack of laminations and the coil. At the same time, the substrate and the heat dissipation fins are made of materials with good heat conduction performance, which can quickly transfer the heat from the heat source to the wind guiding cavity, reduce the accumulation of heat inside the primary of the motor, effectively reduce the working temperature of the primary of the motor, greatly improve the heat dissipation efficiency, ensure the operation stability of the linear motor, reduce the damage of thermal stress to the motor structure, thereby prolong the service life of the motor, and reduce the maintenance cost and replacement frequency of the motor.

[0023] As a further solution of the present invention: heat pipes are provided on the substrate.

[0024] In order to further improve the heat conduction performance of the substrate, heat pipes are arranged on the substrate. By utilizing the principle of evaporation refrigeration, heat is efficiently conducted. The heat pipes can quickly absorb heat and conduct the heat to the condensation side of the heat pipes, and the condensation side is closely attached to the inner surface of the substrate on the side of the heat dissipation fins, which speeds up the heat conduction efficiency of the laminated stack, so that heat is more effectively conducted to the heat dissipation fins, and the wind generated by the fan is used to take away the heat on the substrate and the heat dissipation fins through the air guide cavity, further improving the heat dissipation efficiency, thereby ensuring the rapid cooling of the laminated stack and the coil.

[0025] As a further solution of the present invention: the substrate and the heat dissipation fins are independently selected from copper alloy or aluminum alloy materials respectively.

[0026] Since the substrate and the heat dissipation fins are independently selected from copper alloy or aluminum alloy materials respectively, both copper alloy material and aluminum alloy material have good heat conduction performance, enabling the substrate and the heat dissipation fins to quickly absorb and conduct the heat generated by the laminated stack, accelerating the heat conduction speed from the heat source to the heat dissipation part, thereby improving the overall heat dissipation efficiency.

[0027] As a further solution of the present invention: an insulating plate is arranged between the laminated stack and the coil.

[0028] By arranging an insulating plate between the laminated stack and the coil, the laminated stack and the coil can be effectively isolated, preventing the direct contact between the laminated stack and the coil from causing short circuit or leakage phenomena, avoiding damage to the equipment due to short circuit or leakage, and reducing the possibility of safety accidents, enhancing the overall insulation reliability of the motor, and ensuring the electrical performance stability and safety of the motor.

[0029] As a further solution of the present invention: an air gap is arranged between the primary of the motor and the secondary of the motor, and the width of the air gap is 0.5 mm - 12 mm.

[0030] Since an air gap is arranged between the primary of the motor and the secondary of the motor; the width of the air gap is 0.5 mm - 12 mm, which helps to optimize the magnetic field coupling between the primary of the motor and the secondary of the motor, can not only ensure that the magnetic field can pass through the air gap from the primary of the motor to the secondary of the motor more smoothly, enabling the motor to generate effective electromagnetic thrust, but also effectively reduce the magnetic leakage phenomenon, ensuring the use efficiency and performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 It is a schematic diagram of the overall structure of an air-cooled linear motor;

[0033] Figure 2 It is a schematic diagram of the side view cross-section structure of an air-cooled linear motor;

[0034] Figure 3 Schematic diagram of the primary structure of an air-cooled linear motor

[0035] Figure 4 Schematic sectional view of the primary structure of an air-cooled linear motor

[0036] Figure 5 Schematic diagram of the air-cooling component structure of an air-cooled linear motor

[0037] Reference numerals

[0038] 1. Primary of the motor; 101. Mounting seat; 102. Laminated core group; 103. Tie bolts; 104. Coil; 105. Insulating plate; 2. Secondary of the motor; 201. Permanent magnet; 3. Air-cooling component; 301. Ventilation duct; 302. Fan; 303. Substrate; 304. Fan flange; 305. Air guiding cavity; 306. Heat dissipation fins Detailed implementation manners

[0039] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the technical solutions of the present invention will be further specifically described below through embodiments in conjunction with the accompanying drawings. In the description of the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation to the present invention

[0040] In addition, in the following detailed description, for the sake of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments disclosed herein. However, it is obvious that one or more embodiments can be implemented without these specific details. In other cases, well-known structures and devices are illustrated in a schematic manner to simplify the drawings

[0041] As Figures 1-4 shown in the embodiments of the present invention, an air-cooled linear motor includes: a primary of the motor 1 and a secondary of the motor 2; the secondary of the motor 2 is provided with a secondary mounting frame and a permanent magnet 201 connected to the secondary mounting frame; the primary of the motor 1 includes a mounting seat 101, a laminated core group 102, and a plurality of tie bolts 103 disposed closely on the side of the laminated core group 102; a plurality of convex portions are further provided on the side of the laminated core group 102, and a plurality of coils 104 are respectively disposed corresponding to the plurality of convex portions; at least one end of the top or bottom of the laminated core group 102 is closely provided with an air-cooling component 3, and a plurality of tie bolts 103 pass through the air-cooling component 3

[0042] Specifically, in this air-cooled linear motor, an air-cooling component 3 is closely arranged at least at one end of the top or bottom of the lamination stack 102 in the motor primary 1, and a tie bolt 103 is passed through the air-cooling component 3 to fix it to the lamination stack 102, so that the heat generated by the lamination stack 102 and the coil 104 in the motor primary 1 can be quickly conducted to the air-cooling component 3. The air-cooling component 3 generates wind to make the air flow quickly, taking away the heat conducted from the lamination stack 102 and the coil 104 on the air-cooling component 3. Compared with the air-cooling method of the existing linear motor, it can bypass the insulating board, prevent the insulating board from blocking the air circulation, effectively solve the problem of difficult heat dissipation of the lamination stack 102 and the coil 104 inside the motor primary 1, avoid demagnetization of materials or performance degradation caused by heat accumulation, thus ensuring the stability and thrust density of the motor operation and meeting the high requirements for heat dissipation of high-power permanent magnet synchronous linear motors.

[0043] Moreover, the tie bolt 103 not only undertakes the fixing function between the lamination stack 102 and the air-cooling component 3, but also undertakes the function of assisting the heat conduction of the lamination stack 102, which not only ensures the installation stability of the lamination stack 102 and the air-cooling component 3, but also realizes the organic combination of structure and function, greatly improving the compactness and reliability of the overall structure of the motor.

[0044] At the same time, compared with the water-cooling system, the linear motor with this air-cooling method does not require complex pipelines and coolant, making the structure of the motor primary 1 simpler and lighter. Under the condition of a moving primary, the lighter weight of the motor primary 1 can reduce the inertia during motor startup and operation, improve the response speed and motion accuracy of the motor, enable the motor to achieve linear motion more quickly and accurately, meet the application scenarios with high requirements for motion performance, and thus realize the requirement that this linear motor can be applied to the condition of a moving primary and a fixed secondary.

[0045] According to the embodiment of the present invention, air-cooling components 3 are closely arranged at both the top and the bottom of the lamination stack 102.

[0046] Specifically, since air-cooling components 3 are closely arranged at both the top and the bottom of the lamination stack 102, the heat generated by the lamination stack 102 and the coil 104 can be respectively conducted to the air-cooling components 3 at the top and the bottom of the lamination stack 102, greatly increasing the heat conduction speed and heat dissipation area of the lamination stack 102, effectively reducing the temperature of this linear motor, and ensuring the consistency of heat dissipation of the lamination stack 102 and the coil 104, avoiding local overheating caused by uneven heat dissipation, and ensuring the stable operation of the linear motor in a suitable temperature environment.

[0047] Furthermore, as Figures 2-5As shown in the figure, the air-cooling component 3 includes a ventilation duct 301. One end of the ventilation duct 301 is provided with a fan 302, and the other end of the ventilation duct 301 is provided with a substrate 303. The substrate 303 is arranged closely against the laminated core group 102. The tie bolts 103 are arranged through the side part of the substrate 303. A fan flange 304 is arranged on the substrate 303. The fan 302 is connected to one end of the ventilation duct 301 through the fan flange 304. A wind guiding cavity 305 is arranged in the ventilation duct 301, and a plurality of heat dissipation fins 306 are arranged on one side of the wind guiding cavity 305 close to the substrate 303.

[0048] Specifically, since the air-cooling component 3 includes a ventilation duct 301, one end of the ventilation duct 301 is provided with a fan 302, the other end of the ventilation duct 301 is provided with a substrate 303, the substrate 303 is arranged closely against the laminated core group 102, the tie bolts 103 are arranged through the side part of the substrate 303, a fan flange 304 is arranged on the substrate 303, the fan 302 is connected to one end of the ventilation duct 301 through the fan flange 304, a wind guiding cavity 305 is arranged in the ventilation duct 301, and a plurality of heat dissipation fins 306 are arranged on one side of the wind guiding cavity 305 close to the substrate 303; during the operation of the linear motor, a large amount of heat is generated in the laminated core group 102 and the coil 104 in the motor primary 1. By arranging the substrate 303 of the air-cooling component 3 closely against the laminated core group 102, the laminated core group 102 and the coil 104 can quickly conduct the heat to the substrate 303, and conduct the heat to the plurality of heat dissipation fins 306 in the wind guiding cavity 305 through the substrate 303. The fan 302 is driven to generate high-speed wind and blow it into the ventilation duct 301, so that the air in the wind guiding cavity 305 circulates quickly and takes away the heat on the substrate 303 and the heat dissipation fins 306, thereby realizing the rapid cooling of the laminated core group 102 and the coil 104.

[0049] The design of closely attaching the substrate 303 to the laminated core group 102 through the tie bolts 103 provides an efficient heat conduction path for the heat generated by the laminated core group 102 and the coil 104. At the same time, the substrate 303 and the heat dissipation fins 306 are made of materials with good heat conduction performance, which can quickly transfer the heat from the heat source to the wind guiding cavity 305, reduce the accumulation of heat inside the motor primary 1, effectively reduce the working temperature of the motor primary 1, greatly improve the heat dissipation efficiency, ensure the operation stability of the linear motor, reduce the damage of thermal stress to the motor structure, thereby prolong the service life of the motor, and reduce the maintenance cost and replacement frequency of the motor.

[0050] Furthermore, heat pipes are arranged on the substrate 303.

[0051] Specifically, in order to further improve the heat conduction performance of the substrate 303, a heat pipe is provided on the substrate 303. Using the principle of evaporation refrigeration, heat is efficiently conducted. The heat pipe can quickly absorb heat and conduct the heat to the condensation side of the heat pipe, while the condensation side is close to the inner surface of the substrate 303 on the side of the heat dissipation fin 306, accelerating the heat conduction efficiency of the laminated stack 102, so that the heat is more effectively conducted to the heat dissipation fin 306, and the wind generated by the fan 302 is used to take away the heat on the substrate 303 and the heat dissipation fin 306 through the air guiding cavity 305, further improving the heat dissipation efficiency, thereby ensuring the rapid cooling of the laminated stack 102 and the coil 104.

[0052] Furthermore, the substrate 303 and the heat dissipation fin 306 are independently selected from copper alloy or aluminum alloy materials respectively.

[0053] Specifically, since the substrate 303 and the heat dissipation fin 306 are independently selected from copper alloy or aluminum alloy materials respectively, both the copper alloy material and the aluminum alloy material have good heat conduction performance, enabling the substrate 303 and the heat dissipation fin 306 to quickly absorb and conduct the heat generated by the laminated stack 102, accelerating the heat conduction speed from the heat source to the heat dissipation part, thereby improving the overall heat dissipation efficiency.

[0054] According to an embodiment of the present invention, as Figure 3 shown, an insulating plate 105 is provided between the laminated stack 102 and the coil 104.

[0055] Specifically, by providing the insulating plate 105 between the laminated stack 102 and the coil 104, the laminated stack 102 and the coil 104 can be effectively isolated, preventing the direct contact between the laminated stack 102 and the coil 104 from causing short - circuit or leakage phenomena, avoiding damage to the equipment due to short - circuit or leakage, and reducing the possibility of safety accidents, enhancing the overall insulation reliability of the motor, and ensuring the electrical performance stability and safety of the motor.

[0056] In addition, it should be noted that there is an air gap between the motor primary 1 and the motor secondary 2, and the width of the air gap is 0.5 mm - 12 mm.

[0057] Specifically, since there is an air gap between the motor primary 1 and the motor secondary 2, and the width of the air gap is 0.5 mm - 12 mm, it helps to optimize the magnetic field coupling between the motor primary and the motor secondary. It can not only ensure that the magnetic field can pass through the air gap from the motor primary 1 to the motor secondary 2 smoothly, enabling the motor to generate effective electromagnetic thrust, but also effectively reduce the magnetic leakage phenomenon, ensuring the use efficiency and performance of the motor.

[0058] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only for the specific embodiments of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air-cooled linear motor, characterized in that, Comprising: A motor primary (1) and a motor secondary (2); The motor primary (1) includes a mounting base (101), a lamination stack (102), and a plurality of tie bolts (103) disposed closely on the side of the lamination stack (102); A plurality of protrusions are further provided on the side of the lamination stack (102), and a plurality of coils (104) are respectively disposed on the plurality of protrusions; At least one end of the top or bottom of the lamination stack (102) is closely provided with an air-cooling component (3), and the plurality of tie bolts (103) pass through the air-cooling component (3).

2. The air-cooled linear motor according to claim 1, wherein The air-cooling component (3) is closely provided on both the top and bottom of the lamination stack (102).

3. The air-cooled linear motor according to claim 1 or 2, characterized in that, The air-cooling component (3) includes a ventilation duct (301), and a fan (302) is provided at one end of the ventilation duct (301).

4. The air-cooled linear motor according to claim 3, wherein, A substrate (303) is provided at one end of the ventilation duct (301), the substrate (303) is closely disposed against the lamination stack (102), and the tie bolts (103) pass through the side of the substrate (303).

5. The air-cooled linear motor according to claim 4, characterized in that A fan flange (304) is provided on the substrate (303), and the fan (302) is connected to one end of the ventilation duct (301) through the fan flange (304).

6. The air-cooled linear motor according to claim 5, wherein A wind guide cavity (305) is provided in the ventilation duct (301), and a plurality of heat dissipation fins (306) are provided on one side of the wind guide cavity (305) close to the substrate (303).

7. The air-cooled linear motor according to claim 6, wherein, A heat pipe is provided on the substrate (303).

8. The air-cooled linear motor according to claim 7, wherein, The substrate (303) and the heat dissipation fins (306) are respectively independently selected from copper alloy or aluminum alloy materials.

9. The air-cooled linear motor according to claim 1, wherein An insulating plate (105) is provided between the lamination stack (102) and the coil (104).

10. The air-cooled linear motor according to any one of claims 1 to 9, characterized in that, An air gap is provided between the motor primary (1) and the motor secondary (2); the width of the air gap is 0.5 mm - 12 mm.

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