阅读说明：本技术 一种提升散热性能的铁心及其加工方法 (Iron core for improving heat dissipation performance and processing method thereof ) 是由 张宝立 王静静 于 2020-08-06 设计创作，主要内容包括：本发明涉及一种提升散热性能的铁心及其加工方法。本发明的铁心包括若干个叠片,所述叠片之间固定夹设有导热绝缘层,两侧的叠片的外侧也设有导热绝缘层,两侧的导热绝缘层的外侧设有环氧粉末层。本发明采用了高导热硅脂填充催化剂粒子制作导热绝缘混合物,并涂敷于铁心叠片两面,为铁心提供高效的导热通道,减少了空气气隙的存在,很好的改善、提升电机铁心的散热性能,且不再需要机械固定和液体胶粘剂固化固定。(The invention relates to an iron core for improving heat dissipation performance and a processing method thereof. The iron core comprises a plurality of laminated sheets, wherein heat conduction insulating layers are fixedly clamped between the laminated sheets, the heat conduction insulating layers are also arranged on the outer sides of the laminated sheets on the two sides, and epoxy powder layers are arranged on the outer sides of the heat conduction insulating layers on the two sides. According to the invention, the high-thermal-conductivity silicone grease filled catalyst particles are adopted to prepare the heat-conducting insulating mixture, and the heat-conducting insulating mixture is coated on two surfaces of the iron core lamination, so that a high-efficiency heat-conducting channel is provided for the iron core, the existence of air gaps is reduced, the heat-radiating performance of the iron core of the motor is well improved and improved, and mechanical fixation and liquid adhesive solidification fixation are not required.)

1. The iron core is characterized by comprising a plurality of laminated sheets, wherein a heat conduction insulating layer is fixedly clamped between the laminated sheets, the outer sides of the laminated sheets on two sides are also provided with the heat conduction insulating layer, and the outer sides of the heat conduction insulating layers on two sides are provided with epoxy powder layers.

2. The iron core for improving heat dissipation performance of claim 1, wherein the heat conducting and insulating layer is a cured heat conducting and insulating mixture, and the heat conducting and insulating mixture is prepared by mixing high heat conducting silicone grease and catalyst particles in a certain proportion; the certain proportion is 1: 6-1: 10.

3. a method for processing an iron core with improved heat dissipation performance is characterized by comprising the following steps:

mixing high heat-conducting silicone grease and catalyst particles according to the weight ratio of 1: 6-1: 10 to prepare a heat-conducting and insulating mixture;

after fully and uniformly stirring, standing for a first waiting time;

the heat-conducting and insulating mixture is uniformly coated on two end surfaces of the iron core lamination;

laminating a plurality of iron core laminations coated with the heat-conducting and insulating mixture into an iron core according to the required height;

standing for a second waiting time in a room temperature environment, and curing;

processing the solidified iron core into a required tooth socket shape;

and performing molten bath insulation treatment on the iron core processed into the tooth socket shape.

4. A method of fabricating an iron core with improved heat dissipation performance as recited in claim 3, wherein said first waiting time is longer than 20 minutes; the second waiting time is greater than 48 hours.

5. A method for fabricating a core having improved heat dissipation properties as recited in claim 3, wherein said laminating a plurality of core laminations coated with a heat conductive and insulating compound to a core at a desired height is performed within 2 hours after each core lamination is coated with the heat conductive and insulating compound.

6. A method of fabricating an iron core with improved heat dissipation performance as recited in claim 3, wherein said room temperature environment is not less than 15 ℃.

7. A method of fabricating an iron core with improved heat dissipation performance as recited in claim 3, wherein after said iron core is processed into a desired shape of said slots, surface burrs are treated and impurities in said slots are blown off by dry compressed air.

8. A method of manufacturing an iron core with improved heat dissipation performance as set forth in claim 3, wherein said melt bath insulation treatment comprises the steps of:

uniformly coating epoxy powder on the iron core slot and the end face of the iron core;

and after cooling and solidification, cleaning the inner part of the iron core groove and the position where the coating film is accumulated.

9. The method of claim 3, wherein the step of uniformly applying the epoxy powder to the core slots and the core end faces of the core comprises:

cleaning the end face of the iron core to make the part needing insulation treatment have smooth surface.

10. A method of manufacturing an iron core with improved heat dissipation performance as recited in claim 3, wherein said fuse-bath insulation treatment is performed twice.

Technical Field

The invention relates to the field of iron cores, in particular to an iron core for improving heat dissipation performance and a processing method thereof.

Background

Disclosure of Invention

Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide the iron core with improved heat dissipation performance and the processing method thereof, and the iron core is integrally manufactured by the technologies of lamination bonding, molten bath insulation and the like.

The technical scheme adopted by the invention for realizing the purpose is as follows: the utility model provides a promote iron core of heat dispersion, includes a plurality of lamination, the fixation clamp is equipped with heat conduction insulation layer between the lamination, and the outside of the lamination of both sides also is equipped with heat conduction insulation layer, and the outside of the heat conduction insulation layer of both sides is equipped with the epoxy powder layer.

The heat-conducting insulating layer is a cured heat-conducting insulating mixture which is prepared from high-heat-conducting silicone grease and catalyst particles according to a certain proportion; the certain proportion is 1: 6-1: 10.

a method for processing an iron core with improved heat dissipation performance comprises the following steps:

mixing high heat-conducting silicone grease and catalyst particles according to the weight ratio of 1: 6-1: 10 to prepare a heat-conducting and insulating mixture;

after fully and uniformly stirring, standing for a first waiting time;

the heat-conducting and insulating mixture is uniformly coated on two end surfaces of the iron core lamination;

laminating a plurality of iron core laminations coated with the heat-conducting and insulating mixture into an iron core according to the required height;

standing for a second waiting time in a room temperature environment, and curing;

processing the solidified iron core into a required tooth socket shape;

and performing molten bath insulation treatment on the iron core processed into the tooth socket shape.

The first waiting time is more than 20 minutes; the second waiting time is greater than 48 hours.

And laminating a plurality of iron core laminations coated with the heat-conducting and insulating mixture into iron cores according to the required height, wherein the lamination is completed within 2 hours after each iron core lamination is coated with the heat-conducting and insulating mixture.

The temperature of the room temperature environment is not less than 15 ℃.

And after the solidified iron core is processed into the required tooth socket shape, processing surface burrs, and blowing impurities in the tooth socket by using dry compressed air.

The molten bath insulation treatment comprises the following steps:

uniformly coating epoxy powder on the iron core slot and the end face of the iron core;

and after cooling and solidification, cleaning the inner part of the iron core groove and the position where the coating film is accumulated.

Before the iron core slot and the iron core end face of the iron core are uniformly coated with epoxy powder, the method comprises the following steps:

cleaning the end face of the iron core to make the part needing insulation treatment have smooth surface.

And the melting tank insulation treatment is carried out twice.

The invention has the following advantages and beneficial effects:

1. according to the invention, the high-thermal-conductivity silicone grease filled catalyst particles are adopted to prepare the heat-conducting insulating mixture, and the heat-conducting insulating mixture is coated on two surfaces of the iron core lamination, so that a high-efficiency heat-conducting channel is provided for the iron core, the existence of air gaps is reduced, the heat-radiating performance of the iron core of the motor is well improved and improved, and mechanical fixation and liquid adhesive solidification fixation are not required.

2. The molten bath insulation technology plays a role in isolating and insulating the winding and the iron core in the bath, omits the insulation paper in the iron core bath under the conventional structure, enables the winding and the iron core bath to be in direct contact, is favorable for the transmission and the derivation of the heat of the winding copper wire, and is particularly suitable for the iron core of a low-voltage low-power motor.

3. The invention has universality, is suitable for iron cores of any slot type, not only can be used for motor iron cores, but also is suitable for integrated iron core structures formed by laminating the laminations of transformers and the like, simultaneously supports any secondary processing after bonding and laminating, and has neat appearance, no welding seam and higher aesthetic degree.

4. The iron core does not need riveting by riveting or welding by reserving welding seams, has beautiful appearance and reliable performance, and can be used in the field of motors with strict requirements on appearance, heat dissipation and the like.

Drawings

Fig. 1 is a schematic view of a common silicon steel sheet in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a stacked core structure according to an embodiment of the present invention;

FIG. 3 is a diagram of a finished core construction according to an embodiment of the present invention;

fig. 4 is a sectional view of a finished core of an embodiment of the present invention in a thickness direction;

FIG. 5 is a flow chart of the processing method of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The structure of the core of the present invention will be described with reference to a motor core as an example. As shown in fig. 1, a common silicon steel sheet 1 has a sheet structure, is hollow, and has a circular front surface. As shown in fig. 2, a plurality of silicon steel sheets 1 shown in fig. 1 are stacked together to form an iron core 2 after coating heat conductive and insulating compound on both surfaces thereof. As shown in fig. 3, the stacked core 2 shown in fig. 2 is processed to form a desired core slot 4, and the core slot forms a basic shape of the finished core 3.

As shown in fig. 4, the iron core of the present invention includes a plurality of (i.e., silicon steel sheets 1) in a cross section in a thickness direction, a heat conductive insulating layer 2 is fixedly clamped between the lamination sheets, heat conductive insulating layers 6 are also disposed on outer sides of the lamination sheets on both sides, and epoxy powder layers 7 are disposed on outer sides of the heat conductive insulating layers 6 on both sides. The insulating layer is as thin as possible.

The following will further describe the method for processing the iron core of the present invention with reference to fig. 5 by taking the iron core of the motor as an example.

Preparing a heat-conducting and insulating mixture from high-heat-conducting silicone grease and catalyst particles (modified light yellow epoxy resin particles) according to a certain ratio (1: 6-1: 10), and fully and uniformly stirring.

The heat-conducting and insulating mixture is used after staying for more than 20 minutes, and the prepared heat-conducting and insulating mixture is used up within 4 hours.

The heat-conducting insulating mixture is uniformly coated on the end surface of the silicon steel sheet (circular ring type), and during coating, the film is uniform and complete, and brush leakage and redundant bubbles are not allowed to occur.

Within 2 hours, a certain number of silicon steel sheets are laminated into the iron core through a tool according to the required height, and the laminating coefficient meets the relevant technological requirements (national standard).

And waiting for 48 hours for curing in an environment with the room temperature of more than 15 ℃.

And (3) installing the stacked iron cores on a clamp, and cleaning the surfaces of the iron cores, wherein all sizes meet the requirements of drawings and processes.

And carrying out secondary processing on the iron core to form a required tooth socket shape, treating surface burrs, and blowing off impurities in the tooth socket by using dry compressed air.

The two ends of the iron core are cleaned by cloth stained with banana oil, so that the part needing insulation treatment has a smooth surface.

And coating the iron core slot and the end face of the iron core by using the epoxy powder according to a molten slot insulation coating process. The coating film should be smooth and not blister, and the thickness of the coating film is uniform.

And after cooling and solidification, cleaning the iron core groove and the coating accumulation part.

The second coating is carried out to compensate for the non-uniformity present in the first coating: and coating the iron core slot and the end face of the iron core by using the epoxy powder according to a molten slot insulation coating process. The coating film should be smooth and not blister, and the thickness of the coating film is uniform.

And after cooling and solidification, cleaning the iron core groove and the coating accumulation part to form a finished iron core.