WO2020037939A1

WO2020037939A1 - Iron core and linear motor

Info

Publication number: WO2020037939A1
Application number: PCT/CN2019/070662
Authority: WO
Inventors: 钟成堡; 谢芳; 肖智勇; 张智超; 焦雷; 刘伟健; 郜曦
Original assignee: 珠海格力电器股份有限公司
Priority date: 2018-08-22
Filing date: 2019-01-07
Publication date: 2020-02-27
Also published as: CN109149804A

Abstract

An iron core and a linear motor. The iron core comprises a toothed part (1). The iron core is internally configured with a cooling flow channel (6). The cooling flow channel (6) comprises toothed part cooling flow channel (61). The toothed part cooling flow channel (61) is located within the toothed part (1) to cool the toothed part (1). By cooling the toothed part (1) of the iron core by the toothed part cooling flow channel (61) provided in the toothed part (1) of the iron core, the technical solution implements high cooling efficiency and a better cooling effect, and can significantly improve the working performance of the motor and simplify the process for the assembling of the iron core and a winding.

Description

Iron core, linear motor

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on August 22, 2018, with application number 201810961372.9, and the invention name is "iron core, linear motor", the entire contents of which are incorporated herein by reference.

Technical field

The present application belongs to the technical field of motor manufacturing, and particularly relates to an iron core and linear motor.

Background technique

Linear servo motors are generally used in high-precision motion workplaces, and changes in the working environment temperature easily cause slight thermal deformation of the motion table, which leads to a reduction in motion accuracy. When the linear servo motor works, a large amount of heat is generated in the motor windings, which causes the temperature of the motor's working environment to rise. If the motor windings can generate heat, it will effectively improve the working environment temperature, so that high-precision moving parts can run at a stable temperature.

The patent document with publication number CN100488006C uses a split iron core structure to make a flat cooling pipe into a serpentine shape and set it between the split iron core and its coil windings, and completes the final bending of the serpentine flat cooling pipe during assembly . However, the flat cooling pipe of this solution is arranged in the middle of adjacent coil windings, which will occupy the space of the coil winding. The coil windings must be wound very tightly and neatly, which increases the difficulty of winding the coils. The flat cooling pipe also has an irremovable wall thickness It will also occupy the space of the coil. At the same time, due to the use of flat cooling tubes, it is necessary to assemble the separated iron core from the two sides of the motor during assembly, increasing the complexity of the assembly process.

In the patent document published as CN102832745A, a groove is provided in the yoke portion of the iron core of the motor, and a circular cooling pipe is provided in the yoke portion of the iron core to cool the motor. However, because this solution does not flow the cooling pipe through the iron core teeth, the motor teeth cannot be cooled, and the cooling effect is poor.

Summary of the Invention

Therefore, the technical problem to be solved in the present application is to provide an iron core and linear motor. The core teeth are cooled by a cooling channel provided on the core teeth, which has high cooling efficiency and better cooling effect, and can significantly improve the motor. Performance, simplify the assembly process of iron core and winding.

In order to solve the above problem, the present application provides an iron core including a tooth portion, and a cooling flow path is configured inside the iron core, the cooling flow path includes a tooth cooling flow path, and the tooth cooling flow path is in the Inside the teeth to cool and dissipate the teeth.

Optionally, the iron core further includes a choke, and the cooling channel further includes a choke cooling channel, and the tooth cooling channel and the choke cooling channel pass through to cool and dissipate the iron core. .

Optionally, the flow channel wall of the cooling flow channel has a coating film.

Optionally, the material of the coating film is one of polyurethane, acrylate, epoxy resin, silicone, and NH450.

Optionally, the iron core includes a first side punch, an outer punch, an inner punch, and a second side punch. The outer punch has a hollow structure, and the inner punch is in the hollow structure. A middle punch is formed in the middle, the cooling flow channel is formed on the outer side of the inner punch and the inner side of the outer punch, and the first side punch, the middle punch, and the second side punch are sequentially laminated to form The iron core.

Optionally, the outer punch has a first choke portion and a plurality of first tooth portions evenly arranged, the first tooth portion has a recess portion, and the recess portion and the first chop portion face the first tooth portion. The hollow structure is formed on one side of the portion, the inner punch has a second choke portion and a plurality of second tooth portions evenly spaced along its length direction, the first choke portion and the second choke portion are parallel to each other, A plurality of the second teeth are correspondingly located in the recess.

Optionally, the cooling flow channel has a cooling liquid inlet and a cooling liquid outlet, and the cooling liquid inlet and the cooling liquid outlet are located on the same end surface of the iron core.

Optionally, a joint block is provided at the coolant inlet, and / or a joint block is provided at the coolant outlet.

Optionally, the joint block has a circular hole and a rectangular hole passing through.

Optionally, the joint block further has a groove, an extension direction of the groove is perpendicular to the axial direction of the circular hole, and a plug is provided in the groove to close the notch of the groove.

The present application also provides a linear motor including the above-mentioned iron core.

An iron core and linear motor provided in the present application, because a tooth part cooling flow path is provided inside the tooth part, so that the tooth part can be more effectively cooled and radiated, the cooling efficiency is good, and the cooling effect is better. It can significantly improve the working performance of the motor. In addition, because the tooth cooling flow channel no longer occupies the space outside the tooth, the assembly process of the iron core and the winding is greatly simplified.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of an iron core according to an embodiment of the present application;

2 is a schematic diagram of an internal structure in a cross-sectional state of FIG. 1;

FIG. 3 is a partially enlarged schematic view at A in FIG. 2; FIG.

4 is a schematic structural diagram of an outer punch of an iron core according to another embodiment of the present application;

5 is a schematic structural diagram of an inner punch corresponding to the outer punch in FIG. 4;

6 is a schematic structural diagram of an iron core according to another embodiment of the present application;

7 is a schematic structural diagram of a joint block in FIG. 6;

FIG. 8 is a schematic cross-sectional structure view of the joint block in FIG. 7.

The reference numerals are represented as:

1. Tooth section; 2. Choke section; 3. Coating film; 41. First side punch plate; 42. Outer punch plate; 421; Hollow structure; 422; First hook portion; 423; First tooth portion; 424, recess; 43, inner punch; 431, second choke; 432, second tooth; 44, second side punch; 6, cooling channel; 61, tooth cooling channel; 62, choke 63, cooling liquid inlet; 64, cooling liquid outlet; 7, joint block; 71, round hole; 72, square hole; 73, groove; 8, coil winding.

detailed description

1 to FIG. 8 in combination, according to an embodiment of the present application, an iron core is provided for use in a linear motor, and includes a tooth portion 1 on which a coil winding 8 is wound. A cooling flow passage 6 is configured inside the core, and the cooling flow passage 6 includes a tooth cooling passage 61 which is located in the tooth portion 1 to cool and dissipate the tooth portion 1. In this technical solution, since the tooth part cooling flow passage 61 is provided inside the tooth part 1, the tooth part 1 can be more effectively cooled and radiated, the cooling efficiency is good, the cooling effect is better, and it can be significantly improved. In addition, the working performance of the motor, in addition, because the tooth cooling passage 61 no longer occupies the outer space of the tooth 1, the assembly process of the iron core and the winding is greatly simplified. Further, the iron core further includes a choke 2, and the cooling flow passage 6 further includes a choke cooling flow passage 62, and the tooth cooling flow passage 61 and the choke cooling flow passage 62 pass through to the The iron core performs cooling and heat dissipation. In this technical solution, the cooling channel 6 is capable of cooling and dissipating the teeth 1-stage choke 2 at the same time, so that the heat dissipation and cooling effect of the iron core is better.

The cooling liquid flowing in the cooling channel 6 can be any liquid with cooling function, such as water, lubricating oil, or gas. In order to prevent the cooling liquid from leaking, the cooling liquid and the iron core can be carried out. Isolate to prevent the occurrence of corrosion phenomena. Optionally, the cooling channel 6 has a coating film 3 on the channel wall. The material of the coating film 3 may be one of polymer materials such as polyurethane, acrylate, epoxy resin, silicone, and NH450.

The core can be an integrated core. This type of core is more traditional. The corresponding cooling channel 6 can be mechanically processed, but the processing process is more complicated. Therefore, optionally, the core includes the first core. A side punch 41, an outer punch 42, an inner punch 43, and a second side punch 44. The outer punch 42 has a hollow structure 421, and the inner punch 43 is formed in the hollow structure 421. The middle punch, the outer side of the inner punch 43 and the inner side of the outer punch 42 form the cooling channel 6, and the first side punch 41, the middle punch, and the second side punch 44 are in this order. The iron core is formed by lamination, and the iron core with the cooling channel 6 is formed by the method of split and lamination in this technical solution, which is more convenient and flexible in production and processing. It can be understood that the first side wall punch 41 Each of the middle punch, the second punch and the second side punch 44 may include a plurality of punches with the same shape and stacked to form a punch combination with a certain thickness.

More specifically, the outer punch 42 has a first choke portion 422 and a plurality of uniformly-arranged first tooth portions 423. The first tooth portion 423 has a recessed portion 424, and the recessed portion 424 and the first recessed portion 424 The hollow structure 421 is formed on a side of the portion 422 facing the first tooth portion 423. The inner punch 43 has a second choke portion 431 and a plurality of second tooth portions 432 evenly spaced along its length. The first choke portion 422 and the second choke portion 431 are parallel to each other, and a plurality of the second tooth portions 432 are correspondingly located in the recess portions 424. The tooth portion cooling flow channel 61 formed at this time is in a cooling liquid flow direction. It has a square wave shape or a wave shape, so that the tooth cooling passage 61 can more closely conform to the shape of the first tooth portion 423, make the contact area more uniform, and is beneficial to further improving the heat dissipation effect.

Of course, the cooling channel 6 has a cooling liquid inlet 63 and a cooling liquid outlet 64, and the cooling liquid inlet 63 and the cooling liquid outlet 64 are located on the same side end face of the iron core, which is beneficial to the external liquid supply and liquid return components and Easy to connect. It can be understood that the cooling liquid inlet 63 and the cooling liquid outlet 64 are in the form of rectangular holes. At this time, the corresponding interfaces of the external liquid supply and liquid return pipelines can be designed to match the size. In order to provide connection adaptability of the cooling passage 6 of the iron core to external liquid supply and liquid return components, optionally, a joint block 7 is provided at the cooling liquid inlet 63, and / or, the cooling A joint block 7 is provided at the liquid outlet 64. The joint block 7 has a circular hole 71 and a rectangular hole 72 penetrating therethrough. The rectangular hole 72 is connected to the cooling liquid inlet 63 or the cooling liquid outlet 64. The hole 71 is used for connection with an external liquid supply and liquid return component. In this way, it can be ensured that the interface of the liquid supply and liquid return component does not need special treatment, and the connection can be achieved by using a common cylindrical joint.

In order to facilitate the penetration processing of the circular hole 71 and the rectangular hole 72 on the joint block 7, optionally, the joint block 7 further has a groove 73, and the extending direction of the groove 73 and the round hole 71 The axial direction is perpendicular to each other. A plug is provided in the groove 73 to close the slot of the groove 73. The groove 73 in the technical solution is preferably provided in the circular hole 71 and the rectangular hole 72. The penetration connection of the two can greatly facilitate the penetration processing of the circular hole 71 and the rectangular hole 72 in the joint block 7. Of course, the joint block 7 may have a square shape, a circular shape, etc. in the external shape, which is not particularly limited in the present application.

According to the embodiments of the present application, a linear motor is also provided. The linear motor includes the foregoing iron core. The cooling efficiency is high and the cooling effect is better. The working performance of the motor can be significantly improved, and the assembly process of the iron core and the winding is simplified.

Those skilled in the art can easily understand that the above-mentioned advantageous manners can be freely combined and superimposed on the premise of no conflict.

The above are only preferred embodiments of this application, and are not intended to limit this application. Any modification, equivalent replacement, and improvement made within the spirit and principles of this application shall be included in the scope of protection of this application. Inside. The above are only the preferred embodiments of the present application. It should be noted that, for those of ordinary skill in the art, without departing from the technical principles of the present application, several improvements and modifications can be made. These improvements and modifications should also be made. It is regarded as the protection scope of this application.

Claims

An iron core includes a tooth portion (1), and a cooling flow channel (6) is configured inside the iron core, the cooling flow channel (6) includes a tooth cooling channel (61), and the tooth portion is cooled A flow channel (61) is inside the tooth portion (1) to cool and dissipate the tooth portion (1).
The iron core according to claim 1, further comprising a choke (2), the cooling flow path (6) further comprising a choke cooling flow path (62), the tooth cooling flow path (61), The choke cooling channel (62) penetrates to cool and dissipate the iron core.
The iron core according to claim 1, wherein the cooling channel (6) has a coating film (3) on a wall thereof.
The iron core according to claim 3, wherein a material of the coating film (3) is one of polyurethane, acrylate, epoxy resin, silicone, and NH450.
The iron core according to claim 1, wherein the iron core comprises a first side wall punch (41), an outer side punch (42), an inner side punch (43), and a second side wall punch (44) The outer punching piece (42) has a hollow structure (421), the inner punching piece (43) is in the hollow structure (421) to form an intermediate punching piece, and the outer side of the inner punching piece (43) is connected with the outer punching piece (43) The cooling channel (6) is formed on the inner side of the outer punch (42), and the first side punch (41), the middle punch, and the second side punch (44) are sequentially laminated to form the iron. core.
The iron core according to claim 5, wherein the outer punching piece (42) has a first choke portion (422) and a plurality of first tooth portions (423) evenly arranged, and the first tooth portions (423) ) Has a recessed portion (424), the recessed portion (424) and the first choke portion (422) facing the first toothed portion (423) side to form the hollow structure (421), the inner punching piece (43) a second choke portion (431) and a plurality of second tooth portions (432) evenly spaced along its length direction, the first choke portion (422) and the second choke portion (431) being parallel to each other, A plurality of the second teeth (432) are correspondingly located in the recess (424).
The iron core according to claim 1, wherein the cooling channel (6) has a cooling liquid inlet (63), a cooling liquid outlet (64), the cooling liquid inlet (63), and a cooling liquid outlet (64) It is on the same side end face of the iron core.
The iron core according to claim 7, wherein a joint block (7) is provided at the coolant inlet (63), and / or a joint block (7) is provided at the coolant outlet (64).
The iron core according to claim 8, wherein the joint block (7) has a circular hole (71) and a rectangular hole (72) passing through.
The iron core according to claim 9, wherein the joint block (7) further has a groove (73), and an extending direction of the groove (73) is perpendicular to an axial direction of the circular hole (71) A plug is provided in the groove (73) to close the notch of the groove (73).
A linear motor includes an iron core, wherein the iron core is the iron core according to any one of claims 1 to 10.