Auxiliary device for generator rotor laminations
By designing an auxiliary device for generator rotor lamination including positioning primary key, positioning secondary key and positioning bolt, the problem of lack of reliable radial positioning in yoke stacking is solved, and high-precision yoke stacking is achieved, which shortens the construction period, reduces costs and improves safety.
Patent Information
- Application Number
- CN202421383639.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The prior art lacks reliable radial positioning during the yoke stacking process, which makes it difficult to ensure the roundness, radius, concentricity and perpendicularity of the yoke, affecting the operating stability and safety of the generator set, and at the same time increases the construction period and labor costs, posing safety risks.
An auxiliary device for rotor lamination of generators is designed, including positioning primary key, positioning secondary key and positioning bolts. Through the structure of positioning primary key fixing groove and positioning secondary key, the radial limit, verticality and circularity of the yoke are adjusted to ensure high-precision stacking of the yoke.
Reliable radial limits during the yoke stacking process are achieved, the yoke shaping time is shortened, the construction efficiency is improved, the labor and material costs are reduced, the safety is enhanced, and the high-precision stacking of the yoke is ensured.
Smart Images
Figure CN222721298U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of generator manufacturing, and in particular relates to an auxiliary device for generator rotor laminations. Background Art
[0002] In today's large-scale hydro-turbine generator manufacturing field, the rotor yoke stacking process still generally adopts a combination of short locating pins, long locating pins, locating stacking keys and T-tail locating tools to ensure the yoke stacking quality. This method realizes the radial positioning of the yoke by performing local axial restrictions section by section during the yoke stacking process, ultimately ensuring the verticality and roundness of the yoke.
[0003] However, during the yoke stacking process, due to the lack of reliable radial positioning during the stacking and pre-pressing process, it is extremely difficult to ensure that the roundness, radius, concentricity and verticality of the rotor yoke meet the current standard (0.5mm). These parameters are directly related to the operating stability and safety of the generator set, and any slight deviation may lead to serious consequences.
[0004] In addition, because traditional processes cannot achieve reliable radial limiting, the yoke shaping work is time-sensitive, heavy and delayed, requiring on-site workers to work overtime and use tools such as copper hammers, and even to disassemble the stacked yoke pieces. This not only requires a lot of manpower, material resources and construction time, but also increases the risk of mechanical injuries and falls from heights for workers.
[0005] Therefore, in order to solve these problems, designing a new auxiliary device for rotor laminations has become an urgent and important task in the industry. Utility Model Content
[0006] The technical problem to be solved by the utility model is to solve the deficiencies in the prior art and to design a new auxiliary device for generator rotor laminations. The auxiliary device for generator rotor laminations has a simple structure and is easy to install. It solves the problem that the traditional process only uses a short axial positioning main key for positioning, resulting in a long subsequent yoke shaping work time and delays in the construction period.
[0007] The technical solution adopted by the utility model to solve its technical problems is:
[0008] An auxiliary device for a generator rotor lamination comprises a main positioning key, a secondary positioning key and a positioning bolt.
[0009] The main positioning key is provided with a fixing groove, the secondary positioning key is placed in the fixing groove, and the positioning bolt is installed on the side of the main positioning key.
[0010] As a preferred implementation of the present utility model, the positioning sub-key includes a first cross section and a second cross section, and the area of the first cross section is larger than the area of the second cross section.
[0011] As a preferred implementation manner of the present utility model, a third threaded hole is provided on the side of the main positioning key, and the positioning bolt extends into the third threaded hole and contacts the secondary positioning key.
[0012] As a preferred implementation of the present utility model, the cross section of the positioning sub-key is rectangular.
[0013] As a preferred embodiment of the present utility model, the side portion of the positioning main key is provided with a first chamfer and a second chamfer.
[0014] As a preferred embodiment of the utility model, first prefabricated grooves are arranged on both sides of the main positioning key, and second prefabricated grooves are arranged on both sides of the secondary positioning key, and the second prefabricated grooves are "U"-shaped grooves.
[0015] As a preferred embodiment of the utility model, a first threaded hole is provided at the end of the main positioning key, and a second threaded hole is provided at the end of the secondary positioning key. Both the first threaded hole and the second threaded hole are threadedly connected with a hanging ring.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] 1. The positioning main key of the utility model can achieve reliable radial limit in the yoke stacking, and according to the verticality and roundness adjusted during hanging, it can perfectly ensure the control of the verticality and roundness during the yoke stacking, greatly shortening the yoke shaping time.
[0018] 2. The lamination auxiliary device of the utility model solves the problems that the traditional process only uses indirect radial positioning such as axial short positioning pins, which leads to a long time for subsequent yoke shaping work and delays in construction period, low construction efficiency, high labor cost, high material cost, high energy cost, high labor intensity, and high safety risk. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic diagram of an auxiliary device for generator rotor laminations proposed by the utility model;
[0020] Figure 2 A schematic diagram of an auxiliary device for generator rotor laminations proposed by the utility model;
[0021] Figure 3 A schematic diagram of an auxiliary device for generator rotor laminations proposed by the utility model;
[0022] Figure 4 A schematic diagram of a main key positioning auxiliary device for a generator rotor lamination proposed by the utility model;
[0023] Figure 5The utility model is a schematic diagram of a positioning sub-key for an auxiliary device for generator rotor laminations.
[0024] Description of reference numerals:
[0025] 1-positioning main key, 2-positioning secondary key, 3-positioning bolt, 4-fixing groove, 5-first cross section, 6-second cross section, 7-first chamfer, 8-second chamfer, 9-first prefabricated groove, 10-second prefabricated groove, 11-first threaded hole, 12-second threaded hole. DETAILED DESCRIPTION
[0026] The following describes the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments:
[0027] It should be noted that the structures, colors, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0028] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.
[0029] like Figure 1-Figure 5 As shown, the utility model provides an auxiliary device for generator rotor laminations, comprising a main positioning key 1, a sub-positioning key 2 and a positioning bolt 3. The sub-positioning key 2 is tightly attached to the inner and outer sides of the secondary rib groove of the rotor support. The main positioning key 1 is sleeved on the outer side of the sub-positioning key 2. The radial contact surface has an inclination angle of 1:200. The positioning bolt 3 is extended from the main positioning key 1 as a top screw and pressed against the side of the sub-positioning key 2, which plays a role in fixing the main and sub keys after the verticality and roundness are adjusted, and prevents axial relative displacement. The device is hung as a whole in the secondary rib groove of the rotor by using a C-type clamp, which is evenly distributed around the circumference of the rotor support.
[0030] Before stacking the yokes, after the device is installed, adjust the verticality, roundness (standard is ≤0.20mm), and concentricity (standard is ≤0.10mm) of each positioning main key 1, and then the subsequent yoke stacking operation can be carried out.
[0031] The positioning main key 1 is provided with a fixing groove 4 for placing the positioning sub-key 2; the positioning sub-key 2 is placed in the fixing groove 4 and is nested and connected with the positioning main key 1 to be fixed on the outside of the rotor bracket, so that the positioning sub-key 2 slides up and down in the groove of the positioning main key 1 to adjust the verticality, roundness, concentricity, etc. of the outside of the positioning main key 1.
[0032] The positioning bolt 3 is fixed to the side of the positioning main key 1 and is used to be hung on the rotor secondary rib, so that the device as a whole is hung on the rotor secondary rib, realizing non-local radial limitation in the yoke stacking.
[0033] The positioning secondary key 2 includes a first cross section 5 and a second cross section 6, and the area of the first cross section 5 is larger than the area of the second cross section 6. The positioning secondary key 2 is gradually increased or decreased from one end to the other end, so that the positioning primary key 1 can be radially translated outside thereof to adjust the roundness and concentricity.
[0034] A third threaded hole is provided on the side of the main positioning key 1 , so that the positioning bolt 3 extends into the third threaded hole and contacts the secondary positioning key 2 .
[0035] The cross section of the positioning sub-key 2 is rectangular, has good structural stability, and can resist forces and pressures in various directions.
[0036] The side of the positioning main key 1 is provided with a first chamfer 7 and a second chamfer 8, which reduces the weight and stress concentration.
[0037] The first prefabricated groove 9 is provided on both sides of the main positioning key 1, and the second prefabricated groove 10 is provided on both sides of the secondary positioning key 2. The second prefabricated groove 10 is a "U"-shaped groove. The first prefabricated groove 9 and the second prefabricated groove 10 are both for the convenience of moving and fixing the device. The main positioning key 1 and the secondary positioning key 2 are heavy and difficult to transport. The prefabricated grooves are provided for the staff to move the device and fix it with the secondary vertical ribs of the rotor bracket during installation.
[0038] A first threaded hole 11 is provided at the end of the main positioning key 1, and a second threaded hole 12 is provided at the end of the sub-positioning key 2. Both the first threaded hole 11 and the second threaded hole 12 can be threadedly connected to the lifting ring. When installing the device, the sub-positioning key 2 needs to be placed in the slot of the auxiliary rib of the rotor bracket. However, the sub-positioning key 2 weighs nearly 200 kilograms, and it cannot be fixed to the desired position by manpower. It needs to be transported to the desired position by a crane. The lifting ring is used to connect the crane sling so that the device is fixed to the position with the help of the crane.
[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. An auxiliary device for generator rotor laminations, characterized in that: It includes a main positioning key (1), a secondary positioning key (2) and a positioning bolt (3). The main positioning key (1) is provided with a fixing groove (4), the secondary positioning key (2) is placed in the fixing groove (4), and the positioning bolt (3) is installed on the side of the main positioning key (1).
2. An auxiliary device for generator rotor laminations according to claim 1, characterized in that: The positioning sub-key (2) comprises a first cross section (5) and a second cross section (6), and the area of the first cross section (5) is greater than the area of the second cross section (6).
3. The auxiliary device for generator rotor laminations according to claim 1, characterized in that: A third threaded hole is provided on the side of the main positioning key (1), and the positioning bolt (3) extends into the third threaded hole and contacts the secondary positioning key (2).
4. The auxiliary device for generator rotor laminations according to claim 1, characterized in that: The cross section of the positioning sub-key (2) is rectangular.
5. The auxiliary device for generator rotor laminations according to claim 1, characterized in that: The side of the positioning main key (1) is provided with a first chamfer (7) and a second chamfer (8).
6. The auxiliary device for generator rotor laminations according to claim 1, characterized in that: The first prefabricated grooves (9) are arranged on both sides of the main positioning key (1), and the second prefabricated grooves (10) are arranged on both sides of the secondary positioning key (2), and the second prefabricated grooves (10) are "U"-shaped grooves.
7. The auxiliary device for generator rotor laminations according to claim 1, characterized in that: A first threaded hole (11) is provided at the end of the main positioning key (1), and a second threaded hole (12) is provided at the end of the secondary positioning key (2); the first threaded hole (11) and the second threaded hole (12) are both threadedly connected to a lifting ring.