CN113572320A

CN113572320A - Stator winding hot sleeving method

Info

Publication number: CN113572320A
Application number: CN202110942992.XA
Authority: CN
Inventors: 谢泽胜; 杨天麟; 徐川沂
Original assignee: Chongqing Water Turbine Works Co Ltd
Current assignee: Chongqing Water Turbine Works Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2021-10-29

Abstract

The application relates to the technical field of motor assembly, and discloses a stator winding hot jacket method, through leveling strutting arrangement, treat after the heating of stator frame reaches predetermined temperature, will the stator frame is hung out and is arranged in on the strutting arrangement, the situation will the stator winding inserts in the stator frame, treat after cooling will last crown plate and lower crown plate on the stator winding with the stator winding spot welding is firm, the stator winding embolias the installation cost of stator frame is low.

Description

Stator winding hot sleeving method

Technical Field

The invention relates to the technical field of motor assembly, in particular to a stator winding hot sleeving method.

Background

The stator of generator or motor includes stator base and stator winding, the stator base is a component for supporting stator core or core assembly and stator winding, and is formed from two end covers, ring-shaped middle partition plate, external cover plate, ventilating duct and supporting piece, and the stator of generator is a static portion of motor, and its component mainly includes iron core, base and coil, etc., and the stator base and stator winding are interference-fitted.

In the prior art, a small stator winding is sleeved in a stator base, the stator winding is installed in the stator base in a manual hammering mode, and special large-scale shrink fit installation equipment is needed for sleeving a medium-sized stator winding in the stator base, so that the equipment is expensive.

Disclosure of Invention

The invention aims to provide a stator winding hot sleeving method to reduce the installation cost of sleeving a stator winding into a stator base.

In order to achieve the aim, the invention provides a stator winding hot-sleeving method which is characterized by comprising the following specific steps:

step 1, arranging at least 3 supporting devices below a preset position of a stator base, wherein the supporting devices are uniformly arranged on a ground rail and are firmly pressed, fixed and leveled;

step 2, hoisting the stator base into a heating furnace for heating;

step 3, suspending and leveling the stator winding for standby;

and 4, after the stator base is heated to reach a preset temperature, lifting the stator base out of the supporting device, inserting the stator winding into the stator base, and after cooling, firmly welding the upper ring plate and the lower ring plate on the stator winding with the stator winding.

In order to ensure that the stator base is horizontal, in step 1, any one of the supporting devices is taken as a base point, and the horizontal heights of the other supporting devices are respectively adjusted.

Further, the change of the horizontal height is prevented, and in the step 1, after the supporting device is leveled, the top cap and the locking nut are locked.

In order to adjust the level of the stator winding conveniently, in step 3, the stator winding is suspended and leveled by adopting a hoist auxiliary device, 3 hoisting positions are uniformly distributed on the stator winding, and hoist hooks are arranged on the two hoisting positions.

Has the advantages that: the invention provides a stator winding hot jacket method, which is used for a stator winding hot jacket of a small generator and a stator winding hot jacket of a large motor, wherein a supporting device is arranged in advance, the stator winding is suspended and kept horizontal for standby, a stator base is heated in a heating furnace and then expands, the stator base is taken out and placed above the supporting device, the stator base is in a vertical horizontal state at the moment, the stator winding is slowly inserted into the stator base, spot welding is firm after cooling, and the stator base contracts and is in interference fit with the stator winding.

Drawings

FIG. 1 is a cross-sectional view of a stator frame and stator windings in an embodiment of the present invention;

FIG. 2 is a schematic structural view of the support device of FIG. 1;

FIG. 3 is a top view of the support device of FIG. 1;

FIG. 4 is a schematic structural view of a stator winding in the embodiment;

fig. 5 is a schematic structural diagram of a stator frame in the embodiment.

Reference numerals: 1. a stator frame; 2. a support device; 3. a supporting seat; 4. a stator winding; 5. a top cap; 6. locking the nut; 7. a gourd hook; 8. an upper ring plate; 9. a lower ring plate; 10. a frame level; 11. a level bar; 12. auxiliary positioning lines; 13. a ground rail.

Detailed Description

The following detailed description of the embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions within the basic spirit of the embodiments will still fall within the scope of the present invention as claimed in the claims.

Examples

As shown in fig. 1, 2 and 3, a stator winding hot-sleeving method specifically comprises the following steps:

step 1, at least 4 supporting devices 2 are arranged below a preset position of a stator base 1, the supporting devices 2 are positioned through auxiliary positioning lines 12, each supporting device 2 comprises a supporting seat 3, a top cap 5 and a locking nut 6, the top cap 5 is arranged at the top of the supporting seat 3, the top cap 5 is locked by the locking nut 6, the 4 supporting devices 2 are uniformly arranged on a ground rail 13 and are firmly pressed and fixed, and the supporting devices 2 are horizontally corrected and leveled (at the same height level) by adopting a combination of a horizontal ruler 11 and a frame type level gauge 10 and are used as supports of the stator base 1 in the vertical direction;

step 2, hoisting the stator frame 1 into a heating furnace for heating according to the process requirements;

step 3, as shown in fig. 4, the stator winding 4 is suspended and leveled by a hoist auxiliary device, the stator winding 4 is uniformly distributed with 3 hoisting positions, wherein two hoisting positions adopt hoist hooks 7, the hoist hooks 7 are adjusted to incline the stator winding 4, the stator winding 4 is adjusted to be horizontal, and the stator winding 4 is vertically suspended for standby;

step 4, as shown in fig. 5, after the stator base 1 is heated to reach a predetermined temperature, the stator base 1 is lifted out and placed on the supporting device 2, the stator winding 4 is slowly inserted into the stator base 1, and after cooling, the upper ring plate 8 and the lower ring plate 9 on the stator winding 4 are firmly spot-welded with the stator winding 4.

In step 1, taking any one of the supporting devices 2 as a base point, and respectively adjusting the horizontal heights of the other 3 supporting devices 2 to ensure that the stator frame 1 is horizontal.

In the step 1, after the supporting device 2 is leveled, the top cap 5 and the locking nut 6 are locked to prevent the change of the horizontal height.

Claims

1. A stator winding hot sleeving method is characterized by comprising the following specific steps:

step 1, arranging at least 3 supporting devices (2) below a preset position of a stator base (1), wherein the supporting devices (2) are uniformly arranged on a ground rail (13) and are firmly pressed, fixed and leveled;

step 2, hoisting the stator base (1) into a heating furnace for heating;

step 3, suspending and leveling the stator winding (4) for standby;

and 4, after the stator base (1) is heated to reach a preset temperature, the stator base (1) is lifted out and placed on the supporting device (2), the stator winding (4) is inserted into the stator base (1), and after cooling, an upper annular plate (8) and a lower annular plate (9) on the stator winding (4) are firmly spot-welded with the stator winding (4).

2. The stator winding shrink-fitting method of claim 1, wherein: in step 1, taking any one of the supporting devices (2) as a base point, and respectively adjusting the horizontal height of the other supporting devices (2).

3. A stator winding shrink-fitting method according to claim 1 or 2, characterized in that: in step 1, after the supporting device (3) is leveled, the top cap (5) and the locking nut (6) are locked.

4. The stator winding shrink-fitting method of claim 3, wherein: in the step 3, the stator winding (4) is suspended and leveled by adopting a hoist auxiliary device, 3 hoisting positions are uniformly distributed on the stator winding (4), and hoist hooks (7) are arranged on the two hoisting positions.