CN212258550U

CN212258550U - Electric generator

Info

Publication number: CN212258550U
Application number: CN202020884412.7U
Authority: CN
Inventors: 万滨滨; 杨德华; 但慧俊; 刘明军
Original assignee: Kangfu Technology Co ltd
Current assignee: Kangfu Technology Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-12-29
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a generator, belonging to the field of generators, which comprises a cylinder body and a main machine stator fixed inside the cylinder body; the outer side edge of the main machine stator is provided with a plurality of bulges, and the bulges are fixedly connected with the inner side wall of the cylinder body to support the cylinder body, so that a plurality of axial air channels are formed between the main machine stator and the cylinder body. The protruding part of the main machine stator can support the cylinder body, so that the motor is guaranteed to have high strength, and meanwhile, the axial air channel enables the heat dissipation effect of the motor to be good.

Description

Electric generator

Technical Field

The utility model relates to a generator field especially relates to a generator.

Background

The generator is mainly composed of a stator, a rotor, an end cover, an exciter, a base, a bearing and the like. The stator is made up of a stator core, windings, and other structural members that secure these parts. The stator and the rotor of the generator are connected and assembled through the bearing, the base and the end cover, so that the rotor can rotate in the stator. In order to improve the competitiveness of a generator product in the market, the cost performance of the generator is required to be improved, and the generator base is a main structural member, so that the manufacturing cost of the base can be obviously reduced by simplifying the structure of the base and the processing technology.

At present, the engine base structure of a main current generator on the market is formed by assembling and welding a front flange, a rear flange, a cylinder body and ribs, the structure is complex, the welding is time-consuming, the cost is high, and the cost performance of the generator is directly influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problem of providing a generator which has good strength as a whole, is not easy to deform and has good heat dissipation effect; the engine base has simple structure and good performance.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a generator, which comprises a cylinder body and a main machine stator fixed inside the cylinder body; the outer edge of the main machine stator is provided with a plurality of bulges so as to support and strengthen the cylinder body; the protrusion is fixedly connected with the inner side wall of the cylinder body, so that a plurality of axial air channels are formed between the main machine stator and the cylinder body.

The utility model has the preferable technical proposal that the main machine stator comprises a plurality of stator punching sheets which are overlapped together, and pressing rings are arranged at the two ends of the main machine stator; the main machine stator is provided with a plurality of buckling pieces at positions located in the axial air duct, and the buckling pieces are fixedly connected with the pressing ring and the stator punching sheets.

The utility model discloses preferred technical scheme lies in, be provided with a plurality of through-hole along the axial direction on the host computer stator.

The utility model discloses preferred technical scheme lies in, the barrel both ends are provided with front end housing and rear end cap respectively, be provided with a plurality of spliced pole on the barrel, the front end housing with the rear end cap respectively with both ends spliced pole fixed connection.

The utility model discloses preferred technical scheme lies in, perpendicular to length direction is provided with the screw hole on the spliced pole, the front end housing with be provided with on the rear end cap a plurality of with the connecting bolt that the screw hole matches.

The utility model discloses preferred technical scheme lies in, the spliced pole shape is the polygon, be provided with on the barrel with the spacing hole of spliced pole assorted.

The utility model discloses preferred technical scheme lies in, the spliced pole with one side that the barrel lateral surface offseted be provided with barrel outer wall radian assorted arcwall face.

The utility model discloses preferred technical scheme lies in, still include host computer rotor, exciter stator, exciter rotor, the exciter stator with rear end cap fixed connection, the host computer rotor with the exciter rotor be fixed in same with the rear end cap rotates on the main shaft of connection.

The utility model discloses preferred technical scheme lies in, be provided with long waist shape hole on the barrel lateral wall, in order to communicate the inside and the outside of barrel.

The utility model discloses preferred technical scheme lies in, the barrel bottom is provided with the installation foot, the top of barrel is provided with the lifting flap, and barrel, installation foot, lifting flap constitute the frame jointly.

The utility model has the advantages that:

the utility model provides a generator, which comprises a cylinder body and a main machine stator fixed inside the cylinder body; the outer side edge of the main machine stator is provided with a plurality of bulges, and the bulges are fixedly connected with the inner side wall of the cylinder body, so that a plurality of axial air channels are formed between the main machine stator and the cylinder body. The protruding part of the main machine stator can support the cylinder body, so that the motor is guaranteed to have high strength, and meanwhile, the axial air channel enables the heat dissipation effect of the motor to be good.

Drawings

Fig. 1 is an overall schematic view of a generator provided in an embodiment of the present invention;

fig. 2 is a schematic view of an assembly structure of a generator base and a stator core according to an embodiment of the present invention;

fig. 3 is a schematic side view of an assembly structure of a generator base and a stator core according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a stator punching sheet provided in an embodiment of the present invention;

FIG. 5 is a schematic view of a connecting column structure provided in an embodiment of the present invention;

fig. 6 is a schematic structural view of a portion a in fig. 1 according to an embodiment of the present invention;

in the figure:

1. a front end cover; 2. connecting columns; 3. a machine base; 4. a main machine stator; 5. a main machine rotor; 6. an exciter stator; 7. an exciter rotor; 8. a rear end cap; 9. a barrel; 10. lifting a climbing bar; 11. mounting a foot; 12. stator punching sheets; 13. buckling pieces; 14. pressing a ring; 15. an axial air duct; 17. a through hole; 18. a protrusion; 21. a connecting bolt; 22. a threaded bore.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 6, the generator provided in this embodiment includes a cylinder 9, and a main machine stator 4 fixed inside the cylinder 9; the outer side edge of the main machine stator 4 is provided with a plurality of protrusions 18, and the protrusions 18 are fixedly connected with the inner side wall of the cylinder 9, so that a plurality of axial air ducts 15 are formed between the main machine stator 4 and the cylinder 9. The main machine stator 4 is pressed into a whole through the stator punching sheets 12, the bulge 18 is supported at each position of the inner side wall of the cylinder 9 and plays a supporting role for each position, and the contact position of the bulge 18 and the inner side wall of the cylinder 9 is provided with a certain radian, so that the bulge 18 has a larger supporting surface and a larger supporting role for the cylinder 9. Therefore, the overall strength of the generator is high, and meanwhile, the axial air duct 15 is formed between the concave position beside the protrusion 18 and the inner side wall of the cylinder 9, so that air can well take away heat through the flow of the axial air duct 15, and the heat dissipation performance of the generator is excellent. The traditional motor is reinforced by welding a plurality of ribs, so that the processing is inconvenient; there are also some designs that use a concave-convex shell, but the shell is cumbersome to machine and stress concentration problems may occur in localized areas. The host machine stator 4 of the application adopts the stamping mode forming processing, the processing is convenient, the cylinder body 9 is cylindrical, the processing is convenient, and the stress distribution is uniform. The main machine stator 4 can play a good supporting role for the cylinder 9 after being installed inside the cylinder, and the overall strength is high.

Preferably, the main machine stator 4 comprises a plurality of stator punching sheets 12 which are overlapped together, and pressing rings 14 are arranged at two ends of the main machine stator 4; the main machine stator 4 is provided with a plurality of cramps 13 at the position of the axial air duct 15, and the cramps 13 are fixedly connected with the pressing ring 14 and the stator punching sheets 12. The stator punching sheet 12 is of a whole-piece structure, the pear-shaped groove is provided with 8 through

holes

17, 8 bulges 18 are arranged on the periphery of the pear-shaped groove, and the 8 bulges 18 are tightly contacted with the inner circular surface of the cylinder 9; the stator punching sheet 12 is laminated to form a main machine stator 4, pressing rings 14 are arranged at two ends of the

main machine stator

4, 8 buckling pieces 13 are arranged at the peripheral concave positions, the stator punching sheet 12, the pressing rings 14 and the buckling pieces 13 are welded into a whole to form a stator core, and the main machine stator 4 and the barrel 9 are welded and fixed. The unique convex-concave structure of the stator iron core periphery enables the iron core to be welded into a firm whole through the buckle piece 13 and the pressing ring 14, the iron core is small in elastic opening degree, the axial air duct 15 can be formed, and therefore the stator iron core is stable in structure, good in heat dissipation and low in manufacturing cost.

The motor stator 4 is provided with a plurality of through holes 17 along the axial direction, 8 through holes 17 on the motor stator 4 are also axial ventilation channels of the generator, the through holes 17 on the motor stator 4 can reduce the weight and can also form the axial ventilation channels, and the heat dissipation of the motor is guaranteed.

Preferably, a front end cover 1 and a rear end cover 8 are respectively arranged at two ends of the cylinder 9, a plurality of connecting columns 2 are arranged on the cylinder 9, and the front end cover 1 and the rear end cover 8 are respectively fixedly connected with the connecting columns 2 at the two ends. The two ends of the machine base 3 are not provided with flanges, the inner surface is not provided with ribs, the structure is simple, and the cost is low.

Furthermore, threaded holes 22 are formed in the connecting column 2 in a direction perpendicular to the length direction, and a plurality of connecting bolts 21 matched with the threaded holes 22 are arranged on the front end cover 1 and the rear end cover 8. Furthermore, the connecting column 2 is polygonal in shape and cannot rotate after being installed, and the barrel 9 is provided with a limiting hole matched with the connecting column 2. The front end cover 1 and the rear end cover 8 are both connected with the cylinder 9 through the connecting column 2; in the embodiment, the connecting column 2 is in a regular hexagon structure, a threaded hole 22 is drilled, a large chamfer is arranged at the inlet of the threaded hole 22, the large chamfer plays a role in guiding when a bolt is installed,

preferably, one side of the connecting column 2, which is abutted against the outer side surface of the cylinder 9, is provided with an arc-shaped surface matched with the radian of the outer wall of the cylinder 9. The joint of the arc-shaped surface of the connecting column 2 and the cylinder 9 is provided with an arc surface with the same radius as the excircle of the cylinder 9, so that the joint of the connecting column 2 and the excircle surface of the machine base 3 has no gap, and the appearance is attractive.

Preferably, the magnetic suspension excitation device further comprises a main machine rotor 5, an exciter stator 6 and an exciter rotor 7, wherein the exciter stator 6 is fixedly connected with the rear end cover 8, and the main machine rotor 5 and the exciter rotor 7 are fixed on the same main shaft which is rotatably connected with the rear end cover 8. A long waist-shaped hole is formed in the side wall of the cylinder 9 to communicate the inside and the outside of the cylinder 9. The bottom of the cylinder body 9 is provided with a mounting foot 11, and the top of the cylinder body 9 is provided with a lifting flap 10. The cylinder 9, the mounting foot 11 and the lifting bar 10 jointly form the base 3. The generator is of a single-bearing structure, harmonic excitation is adopted, and a stator winding and a harmonic winding are embedded in the main machine stator 4; four regular hexagonal holes are uniformly distributed on the cylinder 9 close to the two ends respectively, the connecting column 2 is positioned, a long waist-shaped hole is arranged at the rear lower part of the cylinder 9 and is an air inlet on the cylinder 9, and a protective cover is not required to be added at the air inlet; and harmonic excitation is adopted, so that the dynamic performance of the generator is good, and the capability of starting the asynchronous machine is strong. The regular hexagon structure of the connecting column 2 can improve the positioning accuracy, and the bolt is easy to assemble and align; the cylinder 9 is pre-provided with a long waist-shaped hole, so that a protective cover at the air inlet of the base 3 can be omitted, the material cost is saved, and the assembly process of the motor is simplified.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. The generator comprises a cylinder (9) and a main machine stator (4) fixed inside the cylinder (9); the method is characterized in that:

the outer side edge of the main machine stator (4) is provided with a plurality of bulges (18), and the bulges (18) are fixedly connected with the inner side wall of the cylinder body (9) so as to support the cylinder body (9); a plurality of axial air ducts (15) are formed between the main machine stator (4) and the cylinder (9).

2. The generator of claim 1, wherein:

the main machine stator (4) comprises a plurality of stator punching sheets (12) which are overlapped together, and pressing rings (14) are arranged at two ends of the main machine stator (4);

the main machine stator (4) is provided with a plurality of buckling pieces (13) at the position of an axial air duct (15), and the buckling pieces (13) are fixedly connected with the pressing ring (14) and the stator punching pieces (12).

3. The generator of claim 1 or 2, wherein:

the main machine stator (4) is provided with a plurality of through holes (17) along the axial direction.

4. The generator of claim 1, wherein:

barrel (9) both ends are provided with front end housing (1) and rear end cap (8) respectively, be provided with a plurality of spliced pole (2) on barrel (9), front end housing (1) with rear end cap (8) respectively with both ends spliced pole (2) fixed connection.

5. The generator of claim 4, wherein:

threaded holes (22) are formed in the connecting column (2) in a direction perpendicular to the length direction, and a plurality of connecting bolts (21) matched with the threaded holes (22) are arranged on the front end cover (1) and the rear end cover (8).

6. The generator of claim 4 or 5, wherein:

the connecting column (2) is polygonal, and a limiting hole matched with the connecting column (2) is formed in the barrel (9).

7. The generator of claim 4 or 5, wherein:

one side of the connecting column (2) which is abutted against the outer side surface of the barrel body (9) is provided with an arc-shaped surface matched with the radian of the outer wall of the barrel body (9).

8. The generator of claim 4, wherein:

the novel magnetic excitation device is characterized by further comprising a main machine rotor (5), an exciter stator (6) and an exciter rotor (7), wherein the exciter stator (6) is fixedly connected with the rear end cover (8), and the main machine rotor (5) and the exciter rotor (7) are fixed on the same main shaft which is rotatably connected with the rear end cover (8).

9. The generator of claim 1, wherein:

the side wall of the cylinder body (9) is provided with a long waist-shaped hole to communicate the inside and the outside of the cylinder body (9).

10. The generator of claim 1, wherein:

the bottom of the barrel body (9) is provided with a mounting foot (11), and the top of the barrel body (9) is provided with a lifting tab (10).