Insulation paper

Abstract

The utility model relates to insulation paper, which is used for being arranged in a stator slot formed in an iron core and comprises a bottom surface, a left side surface, a right side surface, a left connecting surface, a right connecting surface, a left fixing surface and a right fixing surface, the left side of the bottom surface is connected with the left side surface, the left side surface is connected with the left connecting surface, and the left connecting surface is connected with the left fixing surface; the right side of the bottom surface is connected with the right side surface, the right side surface is connected with the right connecting surface, and the right connecting surface is connected with the right fixing surface; a temporary storage groove and a communication groove are formed in the position, close to the outer ring of the iron core, of the bottom of the stator groove. The insulation paper is used for guiding the cooling oil in the stator slots to flow towards two axial ends of the stator slots. The insulation paper is in a semi-opening shape, holes can be punched in the stator grooves for oil to enter the stator grooves through the openings, the bottoms are used for limiting cooling oil from flowing out of the groove openings of the stator grooves, and therefore the cooling oil in the stator grooves can only flow towards the two axial ends, and windings in the stator grooves are cooled.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field more specifically, it relates to an insulating paper. BACKGROUND

[0002] At present, insulating paper is designed for isolating electrical connection in motor, and the structure design of the insulating paper usually needs to wrap winding comprehensively to reach the purpose of complete insulation. In the field of oil-cooled motor, insulating paper is also used for isolating cooling oil, but most insulating papers are only designed into U shape, and such structure is easy to fall off. INNOVATION CONTENT

[0003] In view of the deficiencies in the prior art, the utility model provides an insulating paper, which is bent through multiple surfaces on the upper side, cooperates with the stator slot of corresponding shape, plays the role of not easy to fall off, and can cooperate with the cooling oil of the stator slot to efficiently cool the winding.

[0004] The utility model provides an insulating paper, and the technical scheme is as follows:

[0005] An insulating paper is arranged in the stator slot of an iron core, and the insulating paper comprises a bottom surface, a left side surface, a right side surface, a left connecting surface, a right connecting surface, a left fixing surface and a right fixing surface.

[0006] The left side of the bottom surface is connected with the left side surface, the left side surface is connected with the left connecting surface, and the left connecting surface is connected with the left fixing surface.

[0007] The right side of the bottom surface is connected with the right side surface, the right side surface is connected with the right connecting surface, and the right connecting surface is connected with the right fixing surface.

[0008] The iron core is in a cylindrical shape, the stator slot bottom is provided with a temporary storage groove and a communication groove near the position of the outer ring of the iron core, the inner side of the temporary storage groove is communicated with the stator slot through the communication groove, and the width of the temporary storage groove is greater than that of the communication groove.

[0009] The bottom surface is arranged at the slot opening of the stator slot, the left side surface and the right side surface are arranged at the two sides of the stator slot respectively, the left connecting surface and the right connecting surface are arranged at the two sides of the communication groove respectively, and the left fixing surface and the right fixing surface are arranged at the two sides of the temporary storage groove respectively.

[0010] In summary, the above technical scheme has the following beneficial effects: the insulating paper of the application is semi-open, the opening is used for punching oil into the stator slot, and the bottom is used for limiting the outflow of cooling oil from the slot opening of the stator slot, so that the cooling oil in the stator slot can only flow to both ends of the axial direction, thereby cooling the winding in the stator slot. Compared with the ordinary U-shaped insulating paper, the insulating paper of the application is specially used for the core with the temporary storage groove and the communication groove. The temporary storage groove and the communication groove are opened to form a bent space at the bottom of the stator slot, so that the insulating paper can be bent along the side wall of the temporary storage groove and the communication groove, thereby forming the left connecting surface, the right connecting surface, the left fixing surface and the right fixing surface. Such arrangement can better fix the insulating paper in the stator slot and play a role in guiding the flow of cooling oil. In addition, the insulating paper can be an insulating paper with expansion function, which can fix the enameled wire in the slot. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a schematic view of an insulating paper;

[0012] Fig. 2 is a schematic view of an insulating paper in a stator slot;

[0013] Fig. 3 is an enlarged view of an insulating paper.

[0014] Reference signs: 10, insulating paper; 11, bottom surface; 12, left side surface; 13, right side surface; 14, left connecting surface; 15, right connecting surface; 16, left fixing surface; 17, right fixing surface; 20, core; 21, stator slot; 22, temporary storage groove; 23, communication groove. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0016] As Figs. 1-3As shown, an insulating paper 10 is arranged in a stator slot 21 of an iron core 20, the insulating paper 10 comprises a bottom surface 11, a left side surface 12, a right side surface 13, a left connecting surface 14, a right connecting surface 15, a left fixing surface 16 and a right fixing surface 17; the left side of the bottom surface 11 is connected with the left side surface 12, the left side surface 12 is connected with the left connecting surface 14, and the left connecting surface 14 is connected with the left fixing surface 16; the right side of the bottom surface 11 is connected with the right side surface 13, the right side surface 13 is connected with the right connecting surface 15, and the right connecting surface 15 is connected with the right fixing surface 17; the iron core 20 is in a cylindrical shape, the stator slot 21 is provided with a temporary storage slot 22 and a communication slot 23 at a position close to the outer circle of the iron core 20, the inner side of the temporary storage slot 22 is communicated with the stator slot 21 through the communication slot 23, and the width of the temporary storage slot 22 is greater than the width of the communication slot 23; the bottom surface 11 is arranged at the opening of the stator slot 21, the left side surface 12 and the right side surface 13 are respectively arranged at the two sides of the stator slot 21, the left connecting surface 14 and the right connecting surface 15 are respectively arranged at the two sides of the communication slot 23, and the left fixing surface 16 and the right fixing surface 17 are respectively arranged at the two sides of the temporary storage slot 22, and the insulating paper 10 is used to guide the cooling oil in the stator slot 21 to flow to the two ends of the stator slot 21 in the axial direction.

[0017] The insulating paper 10 of the present application is in a half-open shape, the opening is used to inject oil into the stator slot 21, and the bottom is used to limit the cooling oil from flowing out of the opening of the stator slot 21, so that the cooling oil in the stator slot 21 can only flow to the two ends in the axial direction, thereby cooling the winding in the stator slot 21. Compared with the ordinary U-shaped insulating paper 10, the insulating paper 10 of the present application is specially used for the iron core 20 provided with the temporary storage slot 22 and the communication slot 23, and the provision of the temporary storage slot 22 and the communication slot 23 forms a bending space at the bottom of the stator slot 21, so that the insulating paper 10 can be bent along the side wall of the temporary storage slot 22 and the communication slot 23, thereby forming the left connecting surface 14, the right connecting surface 15, the left fixing surface 16 and the right fixing surface 17. Such arrangement can better fix the insulating paper 10 in the stator slot 21 and play a role in guiding the flow of cooling oil. In addition, the insulating paper 10 can be an insulating paper 10 with expansion function, which can fix the enameled wire in the slot.

[0018] The length of the insulating paper 10 in the axial direction is greater than the length of the stator slot 21 in the axial direction. The length of the insulating paper 10 is longer than that of the stator slot 21, and the two ends extend from the two ends of the stator slot 21, thereby ensuring that the cooling oil is injected from the two ends of the stator slot 21.

[0019] The two ends of the insulating paper 10 in the axial direction respectively exceed the two ends of the stator slot 21 in the axial direction.

[0020] The lengths of the two ends of the insulating paper 10 exceeding the stator slot 21 are the same. The length of the insulating paper 10 is longer than that of the stator slot 21, and is symmetrically arranged in the stator slot 21, so that the lengths of the two ends exceeding are the same, thereby making the angle and cooling effect of the cooling oil injected from the two ends the same.

[0021] The insulation paper 10 extends 2-5 cm axially beyond the length of the stator slot 21.

[0022] The bottom of the temporary storage slot 22 is provided with an oil hole for the cooling oil to enter the stator slot 21. The insulation paper 10 of the present application is used for stators with oil cooling, and the cooling oil in the stator preferably enters the stator slot 21 through the oil hole.

[0023] The width of the temporary storage slot 22 is the same as the width of the stator slot 21. This arrangement facilitates stator processing.

[0024] The communication slot 23 is located at the middle position of the stator slot 21.

[0025] The width of the communication slot 23 is less than or equal to half the width of the stator slot 21.

[0026] The width of the communication slot 23 is greater than or equal to one fourth of the width of the stator slot 21. The communication slot 23 functions to allow the cooling oil in the temporary storage slot 22 to be sprayed into the stator slot 21 in a linear manner. The smaller the width of the communication slot 23, the smaller the flow rate of the cooling oil spray, and the faster the flow rate; the wider the communication slot 23, the greater the flow rate, and the slower the flow rate. In order to stabilize the flow rate, the width cannot be too large, and in order to ensure cooling efficiency, the width cannot be too small. Therefore, the width of the communication slot 23 is greater than or equal to one fourth of the width of the stator slot 21, and less than or equal to one half of the width of the stator slot 21. Preferably, the width of the communication slot 23 is one half of the width of the stator slot 21.

[0027] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the scope of the present application should be considered as falling within the protection scope of the present application. It should be noted that for ordinary technical personnel in the technical field, some improvements and refinements without departing from the principles of the present application should also be considered as falling within the protection scope of the present application.

Claims

1. An insulating paper for being disposed in a stator slot (21) opened in an iron core (20), characterized by, The insulating paper (10) comprises a bottom surface (11), a left side surface (12), a right side surface (13), a left connecting surface (14), a right connecting surface (15), a left fixing surface (16) and a right fixing surface (17); The left side of the bottom surface (11) is connected with the left side surface (12), the left side surface (12) is connected with the left connecting surface (14), and the left connecting surface (14) is connected with the left fixing surface (16); The right side of the bottom surface (11) is connected with the right side surface (13), the right side surface (13) is connected with the right connecting surface (15), and the right connecting surface (15) is connected with the right fixing surface (17); The iron core (20) is in a cylindrical shape, the bottom of the stator slot (21) is provided with a temporary storage slot (22) and a communication slot (23) near the outer ring of the iron core (20), the inner side of the temporary storage slot (22) is communicated with the stator slot (21) through the communication slot (23), and the width of the temporary storage slot (22) is greater than that of the communication slot (23). The bottom surface (11) is arranged at the slot opening of the stator slot (21), the left side surface (12) and the right side surface (13) are respectively arranged at the two sides of the stator slot (21), the left connecting surface (14) and the right connecting surface (15) are respectively arranged at the two sides of the communication slot (23), the left fixing surface (16) and the right fixing surface (17) are respectively arranged at the two sides of the temporary storage slot (22), and the insulating paper (10) is used for guiding the cooling oil in the stator slot (21) to flow to the two axial ends of the stator slot (21).

2. The insulation paper according to claim 1, characterized in that The length of the insulating paper (10) in the axial direction is greater than the length of the stator slot (21) in the axial direction.

3. The insulation paper according to claim 2, characterized in that The two ends of the insulating paper (10) in the axial direction respectively exceed the two ends of the stator slot (21) in the axial direction.

4. The insulation paper according to claim 3, wherein The lengths of the two ends of the insulating paper (10) exceeding the stator slot (21) are the same.

5. An insulating paper according to claim 4, characterized in that The lengths of the two ends of the insulating paper (10) exceeding the stator slot (21) are between 2-5 cm.

6. An insulation paper according to any one of claims 1 to 5, characterized in that The bottom of the temporary storage slot (22) is provided with an oil hole for the cooling oil to enter the stator slot (21).

7. The insulation paper according to claim 1, wherein The width of the temporary storage slot (22) is the same as that of the stator slot (21).

8. An insulation paper according to any one of claims 1 to 5, characterized in that The communication slot (23) is located at the middle position of the stator slot (21).

9. An insulation paper according to any one of claims 1-5, characterized in that The width of the communication slot (23) is less than or equal to half of the width of the stator slot (21).

10. The insulation paper according to claim 9, characterized in that The width of the communication slot (23) is greater than or equal to one fourth of the width of the stator slot (21).

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