CN218829268U

CN218829268U - Cage seat type stator core structure for steam turbine generator

Info

Publication number: CN218829268U
Application number: CN202223162575.2U
Authority: CN
Inventors: 裘迪林; 王宗云; 陈芬球; 张银果; 张家洋; 朱棋炜; 王立军
Original assignee: Hangzhou Hangfa Electrical Equipment Co ltd
Current assignee: Hangzhou Hangfa Electrical Equipment Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-04-07
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to a cage seat formula stator core structure for turbo generator relates to turbo generator technical field, including cage seat, clamping ring and stator fanning strip, the stator fanning strip sets up in the cage seat, and the cage seat is including end crown plate and bottom crown plate, and the fixed brace rod that is provided with between end crown plate and the bottom crown plate, brace rod set up a plurality ofly along the circumference interval of end crown plate, and the clamping ring butt is provided with the locating part that is used for injecing the clamping ring position in the one end that the bottom crown plate was kept away from to the stator fanning strip on the cage seat. During machining, after the cage base is machined, the stator fanning strip is pressed in the cage base, the stator fanning strip is pressed tightly through the pressing ring, then the position of the pressing ring is limited through the limiting piece, a welding structure is not adopted, the problem of potential quality hazards caused by welding slag and welding seams does not exist, the production efficiency is effectively improved, and the production quality is improved; and cage seat itself compares in the frame, and the diameter is littleer, simple structure, lifts by crane convenient operation for stator sector piece pile construction cycle is shorter.

Description

Cage seat type stator core structure for steam turbine generator

Technical Field

The utility model belongs to the technical field of turbo generator technique and specifically relates to a cage formula stator core structure for turbo generator is related to.

Background

In the field of manufacturing of turbonators, stators are the main components for generating electromagnetic induction and converting mechanical energy and electric energy. The stator mainly comprises a machine base, an iron core, a winding, an end hoop, a lead and other parts. The base is used for fixing the iron core and forming a part of the shell of the ventilation system of the generator and is formed by welding a plurality of seventy parts, after the base is welded, two planes and an inner hole are processed, lamination of stator fan-shaped sheets is carried out in the base, and after the stator iron core is laminated, finally, the stator pressing ring is welded with the base.

The stator clamping ring and the base are fixed by welding, the welding workload in the circumferential direction is large, the welding cost is high, meanwhile, the quality of a welding seam is greatly related to welding construction, and welding is performed overnight at night when the delivery time of a product is urgent, so that the welding quality is difficult to control.

SUMMERY OF THE UTILITY MODEL

In order to guarantee product quality, this application provides a cage seat formula stator core structure for turbo generator.

The application provides a pair of cage seat formula stator core structure for turbo generator adopts following technical scheme:

the utility model provides a cage seat formula stator core structure for turbo generator, includes cage seat, clamping ring and stator sector, the stator sector sets up in the cage seat, the cage seat includes end crown plate and bottom crown plate, the fixed brace rod that is provided with between end crown plate and the bottom crown plate, the brace rod sets up a plurality ofly along the circumference interval of end crown plate, the clamping ring butt is in the one end that the bottom crown plate was kept away from to the stator sector, be provided with the locating part that is used for injecing the clamping ring position on the cage seat.

By adopting the technical scheme, during processing, after the cage seat is processed, the stator fanning strip is pressed in the cage seat, the stator fanning strip is pressed by the pressing ring, then the position of the pressing ring is limited by the limiting part, a welding structure is not adopted, the problem of potential quality hazard caused by welding slag and welding seams is avoided, the production efficiency is effectively improved, and the production quality is improved; and cage seat itself compares in the frame, and the diameter is littleer, simple structure lifts by crane convenient operation for stator segment lamination construction cycle is shorter.

Optionally, one end of the supporting rib, which is far away from the bottom ring plate, is provided with an extension block, a key groove is formed in the side wall, which is close to the center of the pressing ring, of the extension block, the limiting part is a ring key, and the ring key is clamped in the key groove and is used for being abutted against the pressing ring.

By adopting the technical scheme, after the lamination of the fan-shaped sheets is finished, the pressing ring is installed, and then the annular key is knocked inwards from the opening at one side of the key groove, so that the key groove is clamped in the key groove, and the annular key is abutted against the pressing ring, so that the fixing of the pressing ring and the cage seat is realized; the pressing ring and the cage seat are fixed through the ring key, so that the stress condition of the pressing ring can be more conveniently and accurately calculated, the pressing stress of the stator core can be conveniently calculated, and the stator core can be safely and reliably pressed; and moreover, a welding structure is not adopted, the problem of hidden quality danger caused by welding slag and welding seams does not exist, the production efficiency is effectively improved, and the production quality is improved.

Optionally, an annular groove is formed in the side wall, away from the bottom ring plate, of the pressing ring along the circumferential direction of the pressing ring, a step surface is formed between the pressing ring and the annular groove, the annular groove is formed in the edge of the pressing ring, and the annular key is used for being clamped in the annular groove and abutted to the step surface.

Through adopting above-mentioned technical scheme, ring key and step face butt for one side of ring key and step face are supported tight opposite side and keyway diapire and are supported tightly, and the position of restriction ring key prevents that the ring key is not hard up, improves the fastness to the clamping ring location.

Optionally, the side wall of the ring key close to the pressing ring is provided with an arc surface attached to the step surface.

Through adopting above-mentioned technical scheme, arcwall face and step face cooperation increase ring key lifting surface area, prevent ring key along the radial direction displacement of perpendicular to clamping ring simultaneously, improve the fastness to the clamping ring location.

Optionally, the supporting rib is sleeved with a middle ring, the middle ring is provided with two middle rings, the middle ring is located between the end ring plate and the bottom ring plate, the supporting rib is provided with a first clamping groove, and the middle ring is provided with a second clamping groove used for being inserted into the first clamping groove and clamped with the supporting rib.

Through adopting above-mentioned technical scheme, when processing the cage seat, with the brace rod joint on the zhonghuan to make first draw-in groove and the mutual joint of second draw-in groove, play the effect of fixed zhonghuan and brace rod, a plurality of brace rods are fixed with the mutual joint of zhonghuan, need not to pass through bolt or welded fastening, convenient operation reduces processing cycle.

Optionally, a plurality of ventilation notches are formed in the side wall, close to the stator fan-shaped sheets, of the support rib, a plurality of cavities are formed between the support rib and the middle ring, and stator ventilation slotted plates are arranged between the stator fan-shaped sheets.

Through adopting above-mentioned technical scheme, set up the ventilation notch in the bottom of brace rod, the cooling air of being convenient for flows along the circumference of cage seat, improves the cooling effect of deciding down the scallop.

Optionally, the length direction fixedly connected with dove tail muscle of brace rod is followed to the diapire of brace rod, through mounting fixed connection between dove tail muscle and the brace rod, offer the dove tail groove that is used for with dove tail muscle joint on the stator sector piece.

Through adopting above-mentioned technical scheme, treat cage seat processing completion back, fix the dove tail muscle on the brace rod through the mounting, easy operation is convenient, then can directly fold the stator fanning strip and press in the cage seat, the cooperation of dove tail groove and dove tail muscle on the fan-shaped piece of location to make stator fanning strip position fix.

Optionally, still include outer frame, the cage seat passes through connecting piece fixed connection with outer frame.

By adopting the technical scheme, the cage seat and the outer machine seat are fixed through the connecting piece, a welding structure is not adopted, the problem of potential quality hazards caused by welding slag and welding seams is solved, the production efficiency is effectively improved, and the production quality is improved; meanwhile, the outer machine base and the cage base are processed separately, and the cage base and the outer machine base can be processed synchronously during actual manufacturing and processing, so that the assembly efficiency of the whole stator is improved, and the period is shortened.

In summary, the present application includes at least one of the following beneficial technical effects:

1. during machining, after the cage base is machined, the stator fanning strip is pressed in the cage base, the stator fanning strip is pressed tightly through the pressing ring, then the position of the pressing ring is limited through the limiting piece, a welding structure is not adopted, the problem of potential quality hazards caused by welding slag and welding seams does not exist, the production efficiency is effectively improved, and the production quality is improved; compared with the machine base, the cage base is smaller in diameter, simple in structure and convenient to lift, so that the lamination construction period of the stator fan-shaped sheets is shorter;

2. the pressing ring and the cage seat are fixed through the ring key, so that the stress condition of the pressing ring can be more conveniently and accurately calculated, the press mounting stress of the stator core can be conveniently calculated, and the stator core can be safely and reliably pressed; moreover, a welding structure is not adopted, the problem of hidden quality troubles caused by welding slag and welding seams is solved, the production efficiency is effectively improved, and the production quality is improved;

3. when processing the cage seat, with the brace rod joint on the zhonghuan to make first draw-in groove and the mutual joint of second draw-in groove, play the effect of fixed zhonghuan and brace rod, a plurality of brace rods are fixed with the mutual joint of zhonghuan, need not through bolt or welded fastening, convenient operation reduces the processing week.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic structural view of a cage base embodying the embodiment of the present application;

FIG. 3 is a schematic structural diagram mainly showing a support rib, an end ring plate and a middle ring in the embodiment of the present application;

FIG. 4 is an enlarged view of portion A of FIG. 2;

fig. 5 is a schematic structural diagram of a stator core mainly embodied in the embodiment of the present application;

FIG. 6 is a cross-sectional view taken at view B-B of FIG. 5;

fig. 7 is a schematic structural diagram mainly showing stator segments according to the embodiment of the present application.

Description of reference numerals: 11. pressing a ring; 111. an annular groove; 112. a step surface; 12. a stator segment; 121. a dovetail groove; 2. a cage seat; 21. an end ring plate; 211. a clamping groove; 22. supporting ribs; 221. hoisting the support rib; 2211. lifting the lifting platform; 2212. hoisting the threaded hole; 222. a first card slot; 223. a vent slot; 23. a middle ring; 231. a second card slot; 24. a bottom ring plate; 241. a stator tooth pressing plate; 3. an extension block; 31. a keyway; 311. a ring bond; 3111. an arc-shaped surface; 4. a dove tail tendon; 41. a fixing hole; 411. a screw; 5. an outer housing; 51. a base plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses a cage seat type stator core structure for a steam turbine generator.

Referring to fig. 1 and 2, a cage seat type stator core structure for a steam turbine generator comprises a cage seat 2 and stator fan-shaped pieces 12, wherein the stator fan-shaped pieces 12 are arranged in the cage seat 2, the cage seat 2 comprises an end ring plate 21 and a bottom ring plate 24, supporting ribs 22 are fixedly arranged between the end ring plate 21 and the bottom ring plate 24, the supporting ribs 22 are arranged in a plurality along the circumferential direction of the end ring plate 21 at intervals, and one ends of the supporting ribs 22 are welded and fixed with the bottom ring plate 24.

Referring to fig. 1 and 2, the stator core structure further includes an outer frame 5, a bottom plate 51 is disposed at the bottom of the outer frame 5, the cage base 2 is fixedly connected to the outer frame 5 through a connecting member, the connecting member is a positioning pin, pin holes are formed in the bottom plate 51 and the support rib 22, and the positioning pin is inserted into the pin holes of the bottom plate 51 and the support member to prevent the outer frame 5 and the cage base 2 from circumferential displacement.

Referring to fig. 2, a stator tooth pressing plate 241 is fixedly connected to the bottom ring plate 24, and when the stator segment 12 is laminated, the stator segment 12 abuts against the stator tooth pressing plate 241, thereby positioning the stator segment 12.

Referring to fig. 2 and 3, the support ribs 22 include two lifting support ribs 221, the lifting support ribs 221 are symmetrically arranged, two lifting platforms 2211 are fixedly arranged on the lifting support ribs 221, and lifting threaded holes 2212 are penetratingly arranged on the lifting platforms 2211, so as to lift the whole cage base 2.

Referring to fig. 2 and 3, two middle rings 23 are sleeved on the supporting ribs 22, the middle rings 23 are uniformly arranged at intervals, and the middle rings 23 are located between the end ring plate 21 and the bottom ring plate 24. The side wall of the support rib 22 far away from the center of the cage base 2 is provided with a first clamping groove 222, the side wall of the middle ring 23 near the center of the cage base 2 is provided with a second clamping groove 231 for inserting the first clamping groove 222 and clamping the support rib 22, and after the first clamping groove 222 and the second clamping groove 231 are clamped with each other, the support rib 22 is flush with the side wall of the middle ring 23 far away from the center of the cage base 2. The side wall of the support rib 22 close to the stator segment 12 is provided with a plurality of ventilation notches 223, the ventilation notches 223 are arranged along the length direction of the support rib 22, and a plurality of cavities are formed between the support rib 22 and the middle ring 23.

When the cage base 2 is processed, the supporting ribs 22 are clamped on the middle ring 23, so that the first clamping groove 222 and the second clamping groove 231 are mutually clamped, the effect of fixing the middle ring 23 and the supporting ribs 22 is achieved, the supporting ribs 22 and the middle ring 23 are mutually clamped and fixed, bolts or welding fixation is not needed, operation is convenient, and the processing period is reduced.

Referring to fig. 2 and 3, the end ring plate 21 is provided with clamping grooves 211, the clamping grooves 211 are uniformly spaced along the circumferential direction of the end ring plate 21, and the number of the clamping grooves 211 is equal to the number of the support ribs 22. An extension block 3 is arranged at one end of the support rib 22 far away from the bottom ring plate 24, the extension block 3 and the support rib 22 are integrally formed, and a butt table top is formed between one end of the support rib 22 close to the extension block 3 and the extension block 3; when the end ring plate 21 is installed, the end ring plate 21 is sleeved in from one end of the support rib 22 far away from the bottom ring plate 24 along the length direction of the support rib 22, the end ring plate 21 is abutted against the abutting table top, and then the end ring plate 21 and the support rib 22 are welded and fixed.

Referring to fig. 2 and 4, the pressing ring 11 abuts against one end of the stator segment 12 away from the bottom ring plate 24, and a limiting member for limiting the position of the pressing ring 11 is disposed on the cage base 2. The lateral wall that the extension block 3 is close to clamping ring 11 center has seted up keyway 31, and the locating part is ring key 311, and the width of keyway 31 equals the width of ring key 311, and keyway 31 diapire is the arcwall face, the lateral wall of ring key 311 and keyway 31 diapire butt be with the cambered surface of arcwall face adaptation, ring key 311 joint be used for with 11 butts of clamping ring in keyway 31.

Referring to fig. 2 and 4, an annular groove 111 is formed in the side wall of the pressing ring 11 away from the bottom ring plate 24 along the circumferential direction of the pressing ring 11, a step surface 112 is formed between the pressing ring 11 and the annular groove 111, and the step surface 112 is an arc surface; the annular groove 111 is arranged at the edge of the pressing ring 11, the ring key 311 is used for being clamped in the annular groove 111 and is used for being abutted against the step surface 112, and the side wall of the ring key 311 close to the pressing ring 11 is arranged to be an arc surface 3111 attached to the step surface 112.

The annular key 311 abuts against the step surface 112, so that one side of the annular key 311 abuts against the step surface 112, the other side of the annular key abuts against the bottom wall of the key groove 31, the position of the annular key 311 is limited, the annular key 311 is prevented from loosening, and the positioning firmness of the pressing ring 11 is improved; and arc face 3111 and step face 112 cooperate, increase ring key 311 lifting surface, prevent ring key 311 along the radial direction displacement of perpendicular to clamping ring 11 simultaneously, improve the fastness to clamping ring 11 location.

Wherein, referring to fig. 5 and 6, the length direction fixedly connected with dove tail muscle 4 of brace rod 22 is followed to the diapire of brace rod 22, through mounting fixed connection between dove tail muscle 4 and the brace rod 22, offers the dove tail groove 121 that is used for with dove tail muscle 4 joint on the stator segment 12. Stator ventilation frid and stator insulating pad are provided with between stator segment 12, and stator ventilation frid has seted up the ventilation groove along stator segment 12 radially, the circulation of air of being convenient for.

Referring to fig. 6 and 7, the fixing member is a screw 411, a plurality of fixing holes 41 are formed in the dovetail bar 4, and the screw 411 is inserted into the fixing hole 41 and is in threaded connection with the support bar 22.

The implementation principle of the embodiment of the application is as follows: during processing, the support ribs 22 are firstly clamped on the middle ring 23, so that the first clamping groove 222 and the second clamping groove 231 are mutually clamped, the effect of fixing the middle ring 23 and the support ribs 22 is achieved, the support ribs 22 and the middle ring 23 are mutually clamped and fixed without bolts or welding, the operation is convenient, and the processing period is shortened; after the processing of the cage base 2 is completed, the stator fan-shaped pieces 12 are pressed in the cage base 2 in a pressing mode, the stator fan-shaped pieces 12 are pressed through the pressing ring 11, then the annular key 311 is knocked inwards from an opening on one side of the key groove 31, so that the key groove 31 is connected into the key groove 31, the annular key 311 is abutted against the pressing ring 11, and the fixing of the pressing ring 11 and the cage base 2 is achieved.

A welding structure is not adopted, so that the problem of hidden quality danger caused by welding slag and welding seams is solved, the production efficiency is effectively improved, and the production quality is improved; and cage seat 2 itself compares in the frame, and the diameter is littleer, simple structure, lifts by crane convenient operation for stator segment 12 folds and presses construction cycle shorter.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a cage seat formula stator core structure for turbo generator which characterized in that: including cage seat (2), clamping ring (11) and stator sector piece (12), stator sector piece (12) set up in cage seat (2), cage seat (2) are including end crown plate (21) and bottom crown plate (24), fixed brace rod (22) that is provided with between end crown plate (21) and bottom crown plate (24), brace rod (22) set up a plurality ofly along the circumference interval of end crown plate (21), the one end of bottom crown plate (24) is kept away from in stator sector piece (12) butt clamping ring (11), be provided with the locating part that is used for injecing clamping ring (11) position on cage seat (2).

2. The cage seat type stator core structure for the steam turbine generator according to claim 1, characterized in that: the one end that bottom crown plate (24) was kept away from in brace rod (22) is provided with extension piece (3), key slot (31) have been seted up to the lateral wall that extension piece (3) are close to clamping ring (11) center, the locating part is ring key (311), ring key (311) joint is used for with clamping ring (11) butt in key slot (31).

3. The cage seat type stator core structure for the steam turbine generator according to claim 2, characterized in that: annular groove (111) have been seted up along the circumference of clamping ring (11) to the lateral wall that clamping ring (11) kept away from bottom ring board (24), are formed with step face (112) between shown clamping ring (11) and annular groove (111), annular groove (111) set up in the edge of clamping ring (11), ring key (311) are used for the joint in annular groove (111) be used for with step face (112) butt.

4. The cage seat type stator core structure for the steam turbine generator according to claim 3, characterized in that: the side wall of the ring key (311) close to the pressing ring (11) is provided with an arc-shaped surface (3111) attached to the step surface (112).

5. The cage type stator core structure for the steam turbine generator according to claim 1, characterized in that: the supporting rib (22) is sleeved with a middle ring (23), the middle rings (23) are arranged in two, the middle rings (23) are located between the end ring plate (21) and the bottom ring plate (24), the supporting rib (22) is provided with a first clamping groove (222), and the middle rings (23) are provided with second clamping grooves (231) which are used for being inserted into the first clamping grooves (222) and clamped with the supporting rib (22).

6. The cage seat type stator core structure for the steam turbine generator according to claim 1, characterized in that: the side wall that the brace rod (22) is close to stator segment (12) has seted up ventilation notch (223), ventilation notch (223) set up a plurality ofly along the length direction of brace rod (22), be formed with a plurality of cavitys between brace rod (22) and zhonghuan (23), be provided with stator ventilation frid between stator segment (12).

7. The cage seat type stator core structure for the steam turbine generator according to claim 1, characterized in that: the length direction fixedly connected with dove tail muscle (4) of brace rod (22) is followed to the diapire of brace rod (22), through mounting fixed connection between dove tail muscle (4) and brace rod (22), offer on stator sector piece (12) be used for with dove tail groove (121) of dove tail muscle (4) joint.

8. The cage seat type stator core structure for the steam turbine generator according to claim 7, characterized in that: still include outer frame (5), cage seat (2) pass through connecting piece fixed connection with outer frame (5).