Turbine generator stator coil inserting auxiliary tool
By designing the auxiliary tooling for the stator down-line of the steam turbine generator, the sliding guide wheel assembly, auxiliary wire feeding plate and lower line pad assembly, the problems of coil deformation, operation difficulty and insulation damage during the stator down-line process are solved, and a more efficient and safer stator down-line process is achieved.
Patent Information
- Application Number
- CN202421785825.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-26
AI Technical Summary
When the stator of the steam turbine generator is offline, the coil is heavy and uneven, which makes it easy to deform. The operator has a high labor intensity and is prone to bump into the core during movement, resulting in coil insulation damage.
A steam turbine generator stator downline auxiliary tooling is designed, including multiple sets of sliding guide wheel components, auxiliary wire feeding plates and lower line pad components. Through the cooperation of these components, the uniform force and precise groove entry of the stator coil are achieved.
It reduces coil deformation, reduces operator labor intensity, improves the accuracy and safety of coil entry into the groove, avoids damage to coil insulation, and improves production efficiency.
Smart Images
Figure CN222839540U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stator assembly of a steam turbine generator, and more specifically to the technical field of stator offline auxiliary tooling for a steam turbine generator. Background Art
[0002] When the stator of the steam turbine generator is unloaded, 3 to 5 operators are required to lift a coil together because the coil is heavy, and lift the coil into the inner chamber of the iron core. Two operators are arranged in the inner chamber of the iron core to receive it. The coil is lifted and pushed in by multiple operators until one end of the coil completely passes through the inner chamber of the iron core. Then the operator in the iron core lifts the coil, aligns it with the unloading slot, and pushes it into the slot.
[0003] In the existing offline solution, the coil is stressed at multiple locations during the lifting process, and uneven stress can easily cause deformation. During the movement of the coil in the inner bore of the core, the operator needs to manually tilt the coil at a certain angle to ensure that the coil end passes through the core smoothly and avoids collision with the core. The operator has high labor intensity and is prone to collision with the core during movement. During the process of the coil entering the slot, the operator needs to lift the coil by hand and align it with the slot. Since the width of the coil is very small compared to the slot gap, this operation is difficult and can easily damage the coil insulation. Utility Model Content
[0004] The purpose of the utility model is to solve the above technical problems and provide a stator offline auxiliary tooling for a steam turbine generator.
[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:
[0006] The utility model provides a steam turbine generator stator line-down auxiliary tooling, comprising a plurality of sliding guide wheel assemblies installed in stator core line-down slots, auxiliary wire feeding plates slidably arranged on the plurality of sliding guide wheel assemblies, and line-down pad assemblies inserted into the stator core line-down slots, the plurality of sliding guide wheel assemblies and the line-down pad assemblies are located in different stator core line-down slots, and the auxiliary wire feeding plates are used for placing stator coils.
[0007] In one embodiment, the number of sliding guide wheel assemblies is three groups, each group of sliding guide wheel assemblies includes two coil feeding tools, and the two coil feeding tools in the same group are installed in two adjacent lower wire slots of the stator core.
[0008] In one embodiment, each coil feeding tool includes a square shell, a strip groove arranged on the upper surface of the square shell, two round pin holes arranged on the two side surfaces of the square shell and connected to the strip groove, and a rolling wheel arranged in the strip groove, a cylindrical pin is arranged on the inner ring of the rolling wheel, and the two ends of the cylindrical pin pass through the corresponding round pin holes respectively.
[0009] In one embodiment, the square shell of the coil feeding tool is made of a laminated glass cloth board, and the width of the square shell is smaller than the width of the inner groove of the core.
[0010] In one embodiment, the auxiliary wire feeding board includes a wire feeding coil wooden board, limiting protrusions arranged on both sides of the wire feeding coil wooden board along the length direction, and two sliding grooves arranged at the bottom of the wire feeding coil wooden board along the length direction, and each sliding groove cooperates with a corresponding rolling wheel.
[0011] In one embodiment, the distance between two adjacent coil feeding tool groups is 500 mm-600 mm.
[0012] In one embodiment, the feeding coil wood board is made of hardwood.
[0013] Specifically, the coil feeding board is made of hardwood, and the upper end where the coil is placed is designed as a U-shaped groove to prevent the coil from slipping. The bottom of the U-shaped groove is an inclined surface to prevent the coil from colliding with the iron core. The length of the board is consistent with the length of the straight part of the coil, ensuring uniform force. The two shallow grooves at the bottom contact the bearings of the coil feeding tool when in use.
[0014] In one embodiment, the lower wire pad assembly includes a plurality of lower wire pads arranged at equal intervals, each lower wire pad includes an insert portion and a trapezoidal portion, the insert portion is inserted into the lower wire slot of the stator core, and the inclined surface of the trapezoid is aligned with a side wall of the adjacent lower wire slot of the stator core into which the insert portion is inserted.
[0015] In one embodiment, the material of the bottom line pad is a laminated glass cloth board.
[0016] In one embodiment, a plurality of weight-reducing holes are provided on the trapezoidal portion.
[0017] Specifically, the plug-in part and the stator core lower wire slot are clearance-matched, and the trapezoidal part has multiple weight-reducing holes. The size and angle of the trapezoidal part's inclined surface are designed to ensure that when the lower wire pad is inserted into the stator core lower wire slot, the inclined surface is aligned with one side wall of the adjacent stator core lower wire slot. When in use, place the large surface of the stator coil on the inclined surface and push it into the slot directly by hand without manual alignment.
[0018] The working process is as follows:
[0019] S1. Install the coil feeding tool assembly in the inner chamber of the core. Two coil feeding tools form a group, and a group is placed about 500mm apart. Insert the lower wire pad into the adjacent lower wire slot of the current lower wire slot.
[0020] S2. Place the stator coil on the coil feeding wooden board, and 3-5 people lift the wooden board and lift it into the inner chamber of the stator.
[0021] S3. Place the coil feeding wooden board on the coil feeding tool, ensure that the sliding groove below is aligned with the rolling wheel, and push the coil feeding wooden board together with the stator coil to the other end of the stator core.
[0022] S4. After the stator coil is pushed into place, insert the lower wire pad into the designated slot, lift the stator coil and place it on the lower wire pad, and push it into the slot directly by hand without manual alignment.
[0023] The beneficial effects of the utility model are as follows:
[0024] 1. The whole set of stator offline auxiliary device has a compact and simple design structure and is easy to install. The utility model reduces coil deformation, reduces labor intensity, improves coil slotting accuracy, avoids damage to coil insulation during coil slotting, and improves production efficiency.
[0025] 2. The coil feeding wood board can ensure that the coil is evenly stressed, reduce coil deformation, and tilt the coil at a certain angle to avoid collision between the coil end and the iron core, thus ensuring product quality.
[0026] 3. The coil feeding tool can be firmly installed in the iron core. The stator coil can be fed into the iron core chamber by rolling between the rolling element on the coil feeding tool and the coil feeding wood board, thus reducing labor intensity.
[0027] 4. The down-line pad can ensure the accuracy of the coil entering the slot. By designing the bevel angle and the thickness of the pad, the coil and the down-line slot are automatically aligned to avoid damaging the coil insulation. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a structural schematic diagram of the utility model;
[0029] Figure 2 It is a schematic diagram of the structure of the coil feeding tool;
[0030] Figure 3 yes Figure 2 A schematic diagram of the structure in another direction;
[0031] Figure 4 It is a structural diagram of the downline pad;
[0032] Figure 5 yes Figure 4 Right view of;
[0033] Figure 6 It is a schematic diagram of the auxiliary wire feeding plate and the stator coil;
[0034] Reference numerals: 1-down line pad assembly, 2-stator core, 3-auxiliary wire feeding plate, 4-stator coil, 5-sliding guide wheel assembly;
[0035] 11-plug-in portion, 12-trapezoidal portion, 13-weight-reducing hole;
[0036] 31-coil feeding board, 32-limiting protrusion, 33-sliding groove;
[0037] 51 - rolling wheel, 52 - strip groove, 53 - square housing, 54 - round pin hole. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0040] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0041] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0042] Example 1
[0043] like Figures 1 to 6 As shown, this embodiment provides a steam turbine generator stator line-down auxiliary tooling, including multiple sets of sliding guide wheel assemblies 5 installed in the lower wire slot of the stator core 2, auxiliary wire feeding plates 3 slidingly arranged on the multiple sets of sliding guide wheel assemblies 5, and a lower wire pad assembly 1 inserted into the lower wire slot of the stator core 2. The multiple sets of sliding guide wheel assemblies 5 and the lower wire pad assembly 1 are located in different lower wire slots of the stator core 2, and the auxiliary wire feeding plate 3 is used to place the stator coil 4.
[0044] Example 2
[0045] like Figures 1 to 6 As shown, this embodiment provides a steam turbine generator stator line-down auxiliary tooling, including multiple sets of sliding guide wheel assemblies 5 installed in the lower wire slot of the stator core 2, auxiliary wire feeding plates 3 slidingly arranged on the multiple sets of sliding guide wheel assemblies 5, and a lower wire pad assembly 1 inserted into the lower wire slot of the stator core 2. The multiple sets of sliding guide wheel assemblies 5 and the lower wire pad assembly 1 are located in different lower wire slots of the stator core 2, and the auxiliary wire feeding plate 3 is used to place the stator coil 4.
[0046] There are three groups of sliding guide wheel assemblies 5 , each group of sliding guide wheel assemblies 5 includes two coil feeding tools, and the two coil feeding tools in the same group are installed in the lower wire slots of two adjacent stator cores 2 .
[0047] Each coil feeding tool includes a square shell 53, a strip groove 52 arranged on the upper surface of the square shell 53, two round pin holes 54 arranged on the two side surfaces of the square shell 53 and connected with the strip groove 52, and a rolling wheel 51 arranged in the strip groove 52. A cylindrical pin is arranged on the inner ring of the rolling wheel 51, and the two ends of the cylindrical pin pass through the corresponding round pin holes 54 respectively.
[0048] Example 3
[0049] This embodiment is further optimized on the basis of Embodiment 1 or 2, specifically:
[0050] The square shell 53 of the coil feeding tool is made of a laminated glass cloth plate, and the width of the square shell 53 is smaller than the width of the inner groove of the iron core.
[0051] The auxiliary wire feeding board 3 includes a wire feeding board 31, limiting protrusions 32 arranged on both sides of the wire feeding board 31 along the length direction, and two sliding grooves 33 arranged at the bottom of the wire feeding board 31 along the length direction. Each sliding groove 33 cooperates with a corresponding rolling wheel 51.
[0052] The distance between two adjacent coil feeding tool groups is 500mm-600mm.
[0053] The material of the coil feeding wood board 31 is hardwood.
[0054] Specifically, the coil feeding wooden board 31 is made of hardwood, and the upper end where the coil is placed is designed as a U-shaped groove to prevent the coil from slipping. The bottom of the U-shaped groove is an inclined surface to prevent the coil from colliding with the iron core. The length of the wooden board is consistent with the length of the straight part of the coil, ensuring uniform force. The two shallow grooves at the bottom contact the bearings of the coil feeding tool when in use.
[0055] Example 4
[0056] This embodiment is further optimized on the basis of Embodiment 1 or 2, specifically:
[0057] The square shell 53 of the coil feeding tool is made of a laminated glass cloth plate, and the width of the square shell 53 is smaller than the width of the inner groove of the iron core.
[0058] The auxiliary wire feeding board 3 includes a wire feeding board 31, limiting protrusions 32 arranged on both sides of the wire feeding board 31 along the length direction, and two sliding grooves 33 arranged at the bottom of the wire feeding board 31 along the length direction. Each sliding groove 33 cooperates with a corresponding rolling wheel 51.
[0059] The distance between two adjacent coil feeding tool groups is 500mm-600mm.
[0060] The material of the coil feeding wood board 31 is hardwood.
[0061] The lower wire pad assembly 1 includes a plurality of lower wire pads arranged at equal intervals, each lower wire pad includes an inserting portion 11 and a trapezoidal portion 12, the inserting portion 11 is inserted into the lower wire slot of the stator core 2, and the inclined surface of the trapezoid is aligned with a side wall of the lower wire slot of the adjacent stator core 2 into which the inserting portion 11 is inserted.
[0062] The material of the downline pad is laminated glass cloth board.
[0063] A plurality of weight-reducing holes 13 are provided on the trapezoidal portion 12 .
[0064] Specifically, the plug-in portion 11 is clearance-matched with the lower wire slot of the stator core 2, and the trapezoidal portion 12 is provided with a plurality of weight-reducing holes 13. The size and angle of the inclined surface of the trapezoidal portion 12 are designed to ensure that when the lower wire pad is inserted into the lower wire slot of the stator core 2, the inclined surface is aligned with one side wall of the lower wire slot of the adjacent stator core 2. When in use, the stator coil 4 is placed on the inclined surface and directly pushed into the slot by hand without manual alignment.
[0065] The working process is as follows:
[0066] S1. Install the coil feeding tool assembly in the inner chamber of the core. Two coil feeding tools form a group, and a group is placed about 500mm apart. Insert the lower wire pad into the adjacent lower wire slot of the current lower wire slot.
[0067] S2. After placing the stator coil 4 on the coil feeding wooden board 31, 3-5 persons lift the wooden board and lift it into the inner chamber of the stator.
[0068] S3. Place the coil feeding wooden board 31 on the coil feeding tool, ensure that the sliding groove 33 below is aligned with the rolling wheel 51, and push the coil feeding wooden board 31 together with the stator coil 4 to the other end of the stator core 2.
[0069] S4. After the stator coil 4 is pushed into place, the lower line pad is inserted into the designated slot, the stator coil 4 is lifted and placed on the lower line pad, and is directly pushed into the slot by hand without manual alignment.
Claims
1. A steam turbine generator stator offline auxiliary tooling, characterized in that: The invention comprises a plurality of sets of sliding guide wheel assemblies (5) installed in the lower wire slot of a stator core (2), an auxiliary wire feeding plate (3) slidably arranged on the plurality of sets of sliding guide wheel assemblies (5), and a lower wire pad assembly (1) inserted into the lower wire slot of the stator core (2), wherein the plurality of sets of sliding guide wheel assemblies (5) and the lower wire pad assembly (1) are located in different lower wire slots of the stator core (2), and the auxiliary wire feeding plate (3) is used for placing a stator coil (4).
2. The auxiliary tooling for stator offline of a steam turbine generator according to claim 1, characterized in that: The number of the sliding guide wheel assemblies (5) is three groups, and each group of the sliding guide wheel assemblies (5) includes two coil feeding tools. The two coil feeding tools in the same group are installed in the lower wire slots of two adjacent stator cores (2).
3. The auxiliary tooling for stator offline of a steam turbine generator according to claim 2, characterized in that: Each of the coil feeding tools comprises a square shell (53), a strip groove (52) arranged on the upper surface of the square shell (53), two round pin holes (54) arranged on two side surfaces of the square shell (53) and connected to the strip groove (52), and a rolling wheel (51) arranged in the strip groove (52), wherein a cylindrical pin is arranged on the inner ring of the rolling wheel (51), and the two ends of the cylindrical pin respectively pass through the corresponding round pin holes (54).
4. The auxiliary tooling for steam turbine generator stator offline according to claim 3, characterized in that: The square shell (53) of the coil feeding tool is made of a laminated glass cloth plate, and the width of the square shell (53) is smaller than the width of the inner groove of the iron core.
5. The auxiliary tooling for stator offline of a steam turbine generator according to claim 3, characterized in that: The auxiliary wire feeding board (3) comprises a wire feeding wood board (31), limiting protrusions (32) arranged on both sides of the wire feeding wood board (31) along the length direction, and two sliding grooves (33) arranged at the bottom of the wire feeding wood board (31) along the length direction, and each of the sliding grooves (33) cooperates with the corresponding rolling wheel (51).
6. The auxiliary tooling for stator offline of a steam turbine generator according to claim 2, characterized in that: The distance between two adjacent groups of coil feeding tool groups is 500mm-600mm.
7. The auxiliary tooling for stator offline of a steam turbine generator according to claim 5, characterized in that: The coil feeding wood board (31) is made of hardwood.
8. The auxiliary tooling for steam turbine generator stator offline according to claim 1, characterized in that: The lower wire pad assembly (1) comprises a plurality of lower wire pads arranged at equal intervals, each of the lower wire pads comprising an inserting portion (11) and a trapezoidal portion (12), the inserting portion (11) being inserted into a lower wire slot of a stator core (2), and the inclined surface of the trapezoid being aligned with a side wall of the lower wire slot of an adjacent stator core (2) to which the inserting portion (11) is inserted.
9. The auxiliary tooling for steam turbine generator stator offline according to claim 8, characterized in that: The material of the lower line pad is a laminated glass cloth board.
10. The auxiliary tooling for steam turbine generator stator offline according to claim 8, characterized in that: The trapezoidal portion (12) is provided with a plurality of weight-reducing holes (13).