Radiating device of linear motor

Abstract

A linear motor heat dissipation device provided by the present invention comprises a motor mover slidably arranged on a motor stator, the motor mover comprises a mover shell and a mover cover plate, the mover shell and the mover cover plate form a closed space capable of accommodating a silicon steel sheet, the mover cover plate is provided with an air inlet and an air outlet, and the air inlet is communicated with the air outlet. A main heat dissipation groove is formed in the periphery of the silicon steel sheet, a silicon steel sheet heat dissipation groove is formed in the silicon steel sheet, and the silicon steel sheet heat dissipation groove is communicated with the main heat dissipation groove, so that cold air is input from the air inlet, heated hot air is output from the air outlet, and an air cooling air circulation air path is formed. According to the technical scheme provided by the invention, the heat dissipation structure of the traditional linear motor is greatly simplified by arranging the heat dissipation structure on the indispensable silicon steel sheet, the use of other heat dissipation parts is reduced on the basis of improving the heat dissipation efficiency, the manufacturing cost is reduced, and the service life of the linear motor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of linear motors, and in particular to a linear motor heat dissipation structure with high heat dissipation efficiency. Background Art

[0002] Linear motors are used in many precision machining equipment, and the requirements for the thrust, speed and other performance of linear motors are constantly increasing, which requires a larger current drive, which causes the heat generated by the linear motor to increase sharply during operation, directly leading to the demagnetization of the permanent magnets. The motor efficiency decreases over time, and the motor will also cause unstable conditions such as temperature jumps due to the sudden increase in the temperature of the coil winding.

[0003] There are many technical solutions to improve the heat dissipation effect of linear motors in the prior art, such as the Chinese invention patent with application publication number CN116455146A, which is named "A heat dissipation structure of a linear motor based on a temperature averaging plate". In order to improve the heat dissipation efficiency of the linear motor, the heat dissipation structure provided by the patent is arranged on the linear motor mover 6, including heat dissipation fins 1, a temperature averaging plate 2 (or a phase change temperature averaging plate 2), a silicon steel sheet 3, epoxy resin 4, a thermally conductive gasket 5, a coil winding 8, an iron core 9 and a fixing screw 10, wherein a square groove 15 is arranged on the motor silicon steel sheet 3, and the temperature averaging plate 2 is embedded in the groove 15; the epoxy resin 4 and the thermally conductive gasket 5 are respectively placed on the evaporation end 11 and the condensation end 12 of the temperature averaging plate, wherein the heat dissipation fin 1 is locked on the silicon steel sheet 3 by the fixing screw 10, and in some embodiments, a heat conductive layer is arranged between the evaporation end 11 and the silicon steel sheet 3, and between the condensation end 12 and the heat dissipation fin 1, and the heat dissipation fin is preferably made of copper, copper alloy or other materials, and the temperature averaging plate 2 is a copper-based temperature averaging plate. It can be seen from this that the heat dissipation structure of the above-mentioned linear motor in the prior art is complex, has many parts, and the consumables are all relatively expensive metals. This heat dissipation structure can improve the heat dissipation performance, but its manufacturing cost is very high, and because its heat dissipation is achieved through heat transfer through multiple media or intermediate components, its heat dissipation performance improvement is still limited.

[0004] Another example is the Chinese utility model patent with application publication number CN 219833931 U, which is named "A heat dissipation structure of a linear motor based on a heat pipe". In order to improve the heat dissipation efficiency of the linear motor, the heat dissipation structure provided by the patent is arranged on the mover 6, including a heat dissipation fin 1, a heat pipe 2 (or a phase change heat pipe 2), a silicon steel sheet 3, an epoxy resin 4, a thermally conductive gasket 5, a coil winding 8, an iron core 9 and a fixing screw 10, wherein a square groove 13 is arranged on the motor silicon steel sheet 3, and a plurality of heat pipes 2 are embedded in the groove 13; a thermally conductive interface material is filled between the groove 13 and the heat pipe 2, and a thermally conductive gasket 5 is placed between the heat dissipation fin 1 and the heat pipe 2, wherein the heat dissipation fin 1 is locked on the silicon steel sheet 3 by a fixing screw 10. In some embodiments, the heat pipe 2 is a copper-based heat pipe. Similarly, the heat dissipation structure of the linear motor disclosed in the patent still has the same technical weaknesses or structural defects.

[0005] Therefore, designing a low-cost linear motor heat dissipation structure with simple structure and high heat dissipation performance is what the current market expects. Summary of the invention

[0006] In view of the deficiencies in the prior art in solving the heat dissipation problem of linear motors and market expectations, the main purpose of the present invention is to provide a linear motor heat dissipation device, which strives to improve the heat dissipation efficiency with a simplified heat dissipation structure, while also reducing the manufacturing cost of the linear motor heat dissipation structure.

[0007] The present invention provides a linear motor heat dissipation device, including a motor mover slidably arranged on a motor stator, the motor mover including a mover housing and a mover cover plate, the mover housing and the mover cover plate forming a closed space capable of accommodating a silicon steel sheet, an air inlet and an air outlet are arranged on the mover cover plate, a main heat dissipation groove is arranged around the silicon steel sheet, a silicon steel sheet heat dissipation groove is opened on the silicon steel sheet, and the silicon steel sheet heat dissipation groove is connected to the main heat dissipation groove, so that cold air is input from the air inlet and heated hot air is output from the air outlet to form an air-cooled gas circulation path.

[0008] Furthermore, the silicon steel sheet is provided with silicon steel sheet tooth grooves for winding, and the silicon steel sheet heat dissipation grooves are arranged on the other side opposite to the silicon steel sheet tooth grooves.

[0009] Furthermore, the cross section of the silicon steel sheet heat dissipation slot is rectangular, that is, it is designed to be in a rectangular opening shape.

[0010] Furthermore, the size ratio of the heat dissipation grooves of the silicon steel sheet is set to groove width: groove depth: groove distance = 2:3:2, so as to achieve the most efficient heat dissipation using the silicon steel sheet.

[0011] Preferably, a sealing groove capable of accommodating a sealing gasket is provided on the mover housing, and the sealing gasket can ensure the sealing performance between the mover housing and the mover cover plate. The sealing gasket is a silicone sealing gasket, or a high-performance sealing device made of other materials.

[0012] More preferably, the air inlet and the air outlet are arranged on the mover cover in a diagonal manner.

[0013] Of course, the air inlet and the air outlet may also be respectively arranged at the two ends of the mover cover plate, and are not limited to a diagonal design.

[0014] Generally speaking, the motor stator includes a guide rail and a magnetic steel laid along the guide rail. In addition, the silicon steel sheet is provided with mounting grooves, and the number of the mounting grooves is 4, and other numbers can also be provided according to specific needs.

[0015] The technical solution provided by the present invention greatly simplifies the heat dissipation structure of the traditional linear motor by providing the heat dissipation structure only on the indispensable silicon steel sheet. On the basis of improving the heat dissipation efficiency, it reduces the use of other heat dissipation components, reduces the manufacturing cost, and also prolongs the service life of the linear motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of an embodiment of the present invention after removing the mover cover;

[0018] Figure 3 Schematic diagram of the three-dimensional structure of a silicon steel sheet in an embodiment of the present invention;

[0019] Figure 4 Schematic diagram of the cross-sectional structure of a silicon steel sheet in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solution of the present invention, the embodiments of the present invention will be briefly described below in conjunction with the accompanying drawings. Obviously, the description of the embodiments and the accompanying drawings is only for illustrating the technical solution of the present invention. In the context that ordinary technicians in the field can understand, the protection scope of the present invention is not limited to the embodiments and the accompanying drawings.

[0021] like Figure 1-2As shown, a linear motor heat dissipation device includes a motor mover 3 slidably arranged on a motor stator 6, the motor mover 3 includes a mover housing 31 and a mover cover 32, the mover housing 31 and the mover cover 32 form a closed space capable of accommodating a silicon steel sheet 1, an air inlet 321 and an air outlet 322 are provided on the mover cover 32, a main heat dissipation groove 5 is provided around the silicon steel sheet 1, a silicon steel sheet heat dissipation groove 11 is opened on the silicon steel sheet 1, and the silicon steel sheet heat dissipation groove 11 is connected to the main heat dissipation groove 5.

[0022] In actual operation, cold air is input from the air inlet 321 and flows through the circulation path (air path) formed by the main heat dissipation groove 5 and the silicon steel sheet heat dissipation groove 11, and is finally discharged from the linear motor from the air outlet 322. In this process, the heat generated by the linear motor during operation is taken away, thereby playing a role in dissipating the heat of the linear motor.

[0023] The same as in the prior art is that the silicon steel sheet 1 is provided with a silicon steel sheet tooth groove 12 for winding. The difference from the prior art is that the silicon steel sheet heat dissipation groove 11 is provided on the other side opposite to the silicon steel sheet tooth groove 12. A silicon steel sheet mounting groove 13 is generally also provided on this side. Depending on the specific situation, several silicon steel sheet mounting grooves 13 can be provided, for example, 4 in one embodiment.

[0024] Since the silicon steel sheet heat dissipation groove 11 is provided on the silicon steel sheet 1, the heat dissipation area of ​​the silicon steel sheet 11 is greatly increased, which is more conducive to conducting the heat generated by the linear motor core directly through the silicon steel sheet 1 with an improved design without passing through other heat dissipation components, thereby streamlining the heat dissipation structure, and reducing the manufacturing cost while improving the heat dissipation efficiency.

[0025] In one embodiment, in order to facilitate processing or forming and easy maintenance, the cross-section of the silicon steel sheet heat dissipation groove 11 is set to be rectangular.

[0026] From the heat dissipation principle of the silicon steel sheet 1, the larger the surface area generated by the heat dissipation groove, the higher the heat dissipation efficiency will be. However, in practice, the conditions and needs of the actual situation must still be considered. It has been proved through experiments that when the size ratio of the heat dissipation groove 11 of the silicon steel sheet is 2:3:2, the heat dissipation efficiency is the best. That is, in one embodiment, the groove width of the heat dissipation groove 11 of the silicon steel sheet is 2mm, the groove depth is 3mm, and the distance from the groove edge to the groove edge of the adjacent heat dissipation groove 11 of the silicon steel sheet is 2mm. Through experiments, the heat dissipation performance of the heat dissipation groove 11 of the silicon steel sheet set in this ratio is better than that of other setting ratios.

[0027] The mover housing 31 is provided with a sealing groove 4 capable of accommodating a sealing gasket. The sealing gasket ensures the sealing performance between the mover housing 31 and the mover cover plate 32 . The sealing gasket can be a commonly used silicone sealing ring.

[0028] In one embodiment, the air inlet 321 and the air outlet 322 are arranged on the mover cover 32 in a diagonal manner, so that the cold air input into the linear motor for heat dissipation will flow through the longest path, and its heat dissipation efficiency is high.

[0029] In another embodiment, according to the requirements of the actual installation position, the air inlet 321 and the air outlet 322 are respectively arranged at two ends of the mover cover plate 32 .

[0030] As in the prior art, the motor stator 6 includes a guide rail and a magnetic steel arranged along the guide rail. In addition, the silicon steel sheet is also provided with mounting grooves, which are 4 in number and can be other numbers according to specific needs.

[0031] Compared with the existing design scheme, the heat dissipation device of the embodiment scheme provided by the present invention eliminates multiple intermediate heat dissipation components and improves the heat dissipation performance by directly opening heat dissipation grooves on the silicon steel sheet to increase the heat dissipation area. It not only simplifies the structure of the linear motor, but also increases the service life of the linear motor while reducing the manufacturing cost.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention and should not be considered as limiting the protection scope of the present invention. The present invention is used in the technical field of linear motor related products.

Claims

1. A linear motor heat dissipation device, comprising a motor mover slidably arranged on a motor stator, the motor mover comprising a mover housing and a mover cover, the mover housing and the mover cover forming a closed space capable of accommodating a silicon steel sheet, characterized in that: An air inlet and an air outlet are arranged on the mover cover plate, a main heat dissipation groove is arranged around the silicon steel sheet, a silicon steel sheet heat dissipation groove is opened on the silicon steel sheet, and the silicon steel sheet heat dissipation groove is connected to the main heat dissipation groove.

2. The linear motor heat dissipation device according to claim 1, characterized in that: The silicon steel sheet is provided with silicon steel sheet tooth grooves for winding, and the silicon steel sheet heat dissipation grooves are arranged on the other side opposite to the silicon steel sheet tooth grooves.

3. The linear motor heat dissipation device according to claim 2, characterized in that: The cross section of the silicon steel sheet heat dissipation groove is rectangular.

4. The linear motor heat dissipation device as claimed in claim 3, characterized in that: The size ratio of the heat dissipation groove of the silicon steel sheet is groove width: groove depth: groove distance = 2:3:

2.

5. The linear motor heat dissipation device according to claim 1, characterized in that: The mover housing is provided with a sealing groove capable of accommodating a sealing gasket, and the sealing gasket can ensure the sealing performance between the mover housing and the mover cover plate.

6. The linear motor heat dissipation device according to claim 5, characterized in that: The sealing gasket is a silicone sealing gasket.

7. The linear motor heat dissipation device according to claim 1, characterized in that: The air inlet and the air outlet are arranged on the mover cover in a diagonal manner.

8. The linear motor heat dissipation device according to claim 1, characterized in that: The air inlet and the air outlet are respectively arranged at two ends of the mover cover plate.

9. The linear motor heat dissipation device according to any one of claims 1 to 8, characterized in that: The motor stator comprises a guide rail and a magnetic steel arranged along the guide rail.

10. The linear motor heat dissipation device according to any one of claims 1 to 8, characterized in that: The silicon steel sheet is provided with mounting grooves, and there are four mounting grooves.

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