Rotor yoke segmented tensioning structure

Abstract

The utility model relates to rotor accessory technical field, concretely discloses rotor magnet yoke sectional type tension structure, including magnet yoke tension screw rod and rotor magnet yoke tension bolt, magnet yoke tension screw rod passes through several magnet yokes, magnet yoke tension screw rod is connected with first fixed part, and the first fixed part is equipped with the backing plate of being placed in magnet yoke one side near magnet yoke one side, and rotor magnet yoke tension bolt connects magnet yoke and rotor support, the utility model discloses magnet yoke tension screw rod and rotor magnet yoke tension bolt form cross tension, and magnet yoke tension screw rod and first fixed part and backing plate cooperate to magnet yoke tension fixed of superimposed pressure, and rotor magnet yoke tension bolt cooperates with second fixed part and is fixed between magnet yoke and rotor support, and the setting of fixed place antiskid tooth surface, compared with traditional thread lock, the contact area is big, stress distribution is even, magnet yoke tension screw rod and rotor magnet yoke tension bolt are all independent installation, and when partial damage can be replaced alone, do not need to dismantle integrally, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of rotor component technology, specifically to a segmented tensioning structure for rotor magnetic yoke. Background Technology

[0002] The generator mainly consists of a stator, rotor, and turbine head, forming a waterproof whole with the turbine. The rotor primarily comprises a rotor support, yoke, magnetic poles, and rotor leads. The rotor support is composed of a central ring plate and 28 diagonal support arms made of stiffening plates and vertical ribs. The rotor support arms are connected to the yoke by high-strength bolts. The yoke is made of 4mm thick high-strength yoke steel plates (DER550) stacked together and then tightened by bolts. The yoke core is 1672mm long and consists of 20 yoke laminations, each lamination having four pole pitches. The yoke has sufficient ventilation grooves, forming a radial ventilation circuit together with the rotor support. Upper and lower pressure plates are located at the upper and lower ends of the laminations, with 40 easily removable brake rings on the upper pressure plate. The yoke and rotor support are connected by bolts, which tighten the yoke's central column to the rotor support's vertical ribs, making the rotor support and yoke a single unit.

[0003] A magnetic yoke segment connection structure disclosed in existing patent publication number CN211183547U includes: a pad, which is wedge-shaped and is disposed in the T-shaped tail groove of the magnetic yoke segment and is disposed along the extension direction of the magnetic yoke segment; two adjusting bodies, which are cylindrical and are disposed along the extension direction of the pad, and are located between the pad and the magnetic yoke segment, and respectively abut against the two apex corners of the T-shaped tail groove of the magnetic yoke segment; and a pull rod, one end of which is connected to the pad and the pad is engaged with the opening of the T-shaped tail groove of the magnetic yoke segment by a tightening nut.

[0004] In the aforementioned connection structure, the wedge-shaped pads enhance structural stability. The pads must precisely match the inclined surface of the T-shaped tail groove of the yoke section. Furthermore, under high-frequency rotor vibration, the tensioning screw and its connecting components are prone to fretting wear, leading to a decrease in preload. If the anti-loosening element is located inside the yoke, subsequent inspection or re-tightening operations require disassembling peripheral components. Components such as the tie rod, pads, and adjusting body must be aligned one by one during installation, making the process cumbersome. To address these issues, a segmented rotor yoke tensioning structure is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a segmented tensioning structure for the rotor yoke to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The rotor yoke segmented tensioning structure includes a yoke tensioning screw and a rotor yoke tensioning bolt;

[0008] The magnetic yoke tensioning screw passes through several magnetic yokes. A first fixing member is connected to the magnetic yoke tensioning screw. A pad is provided on one side of the magnetic yoke near the first fixing member. The rotor magnetic yoke tensioning bolt connects the magnetic yoke and the rotor support. One end of the rotor magnetic yoke tensioning bolt extending to the rotor support is connected to a second fixing member.

[0009] The first fixing member includes a first locking nut and a first stop washer. The first locking nut is provided with a first anti-slip tooth A surface on the side near the first stop washer. The first stop washer is provided with a first anti-slip tooth B surface that mates with the first anti-slip tooth A surface on one side. The first stop washer is provided with a limiting member that connects to the pad on one side.

[0010] The second fastener includes a second locking nut and a second stop washer. The second locking nut has a second anti-slip tooth A surface on the side near the second stop washer, and the second stop washer has a second anti-slip tooth B surface on the side that mates with the second anti-slip tooth A surface. The rotor magnetic yoke tensioning bolt has an anti-slip tooth contact surface on the side away from the second anti-slip tooth B surface.

[0011] In one alternative: the pad is provided with a through hole for the magnetic yoke tension screw to pass through, the through hole corresponding to the screw through hole on the magnetic yoke.

[0012] In one alternative embodiment: the limiting member includes four sets of limiting rods connected to one side of the first stop pad, and the pad has limiting holes on one side that mate with the limiting rods.

[0013] In one alternative: both the first anti-slip tooth surface A and the second anti-slip tooth surface A include a plurality of tooth grooves, which are arranged in a circular array, and the cross-section of the tooth grooves is a right-angled triangle.

[0014] In one alternative: a stop rod is welded to one side of the second locking nut, and a rotor bracket is welded to the end of the stop rod away from the second locking nut.

[0015] In one alternative: the magnetic yoke is internally fixedly connected to a central column that is threadedly connected to the rotor magnetic yoke tension bolt.

[0016] In one alternative: the magnetic yoke tensioning screw is arranged parallel to the rotor axis, and the rotor magnetic yoke tensioning bolt is arranged radially along the rotor.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] In this invention, the magnetic yoke tensioning screw and the rotor magnetic yoke tensioning bolt form a cross tension. The magnetic yoke tensioning screw, together with the first fixing component and the pad, tightens and fixes the stacked magnetic yoke. The rotor magnetic yoke tensioning bolt, together with the second fixing component, tightens and fixes the magnetic yoke and the rotor support. The anti-slip toothed surface at the fixing point provides a larger contact area and more uniform stress distribution compared to traditional threaded anti-loosening. The magnetic yoke tensioning screw and the rotor magnetic yoke tensioning bolt are installed independently, and can be replaced individually when partially damaged, without the need for overall disassembly, thus reducing maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a partial structural schematic diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the first fixing member and the pad in this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the pad in this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the pad in this utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the pad in this utility model.

[0025] In the diagram: 1. Magnetic yoke tensioning screw; 2. First fixing component; 3. Pad; 4. Magnetic yoke; 5. Rotor magnetic yoke tensioning bolt; 6. Second fixing component; 7. Rotor bracket; 201. First locking nut; 202. First stop washer; 203. First anti-slip tooth A surface; 204. First anti-slip tooth B surface; 205. Limiting rod; 301. Through hole; 302. Limiting hole; 601. Second locking nut; 602. Second stop washer; 603. Second anti-slip tooth A surface; 604. Second anti-slip tooth B surface; 605. Anti-slip tooth contact surface; 606. Stopping rod. Detailed Implementation

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 6 In this embodiment, the rotor yoke segmented tensioning structure includes a yoke tensioning screw 1 and a rotor yoke tensioning bolt 5. The yoke tensioning screw 1 is arranged parallel to the rotor axis and passes through multiple yokes 4. Both ends are connected to the pad 3 through the first fixing member 2 to form an axial preload. The axial tension is uniformly transmitted to the yoke 4 through the pad 3, eliminating the assembly gap between the segmented yokes and forming an integral rigid structure.

[0029] The magnetic yoke tensioning screw 1 passes through several magnetic yokes 4. A first fixing member 2 is connected to the magnetic yoke tensioning screw 1. A pad 3 is provided on the side of the first fixing member 2 near the magnetic yoke 4. The rotor magnetic yoke tensioning bolt 5 connects the magnetic yoke 4 and the rotor support 7. One end of the rotor magnetic yoke tensioning bolt 5 extending to the rotor support 7 is connected to a second fixing member 6. The rotor magnetic yoke tensioning bolt 5 is arranged radially along the rotor. One end of the rotor magnetic yoke tensioning bolt 5 is connected to the magnetic yoke 4, and the other end is fixed to the rotor support 7 through the second fixing member 6.

[0030] The first fixing member 2 includes a first locking nut 201 and a first stop washer 202. The first locking nut 201 has a first anti-slip tooth A surface 203 on the side near the first stop washer 202. The first stop washer 202 has a first anti-slip tooth B surface 204 that cooperates with the first anti-slip tooth A surface 203 on one side. The first stop washer 202 has a limiting member that connects to the pad 3 on one side. The first anti-slip tooth A surface 203 of the first locking nut 201 meshes with the first anti-slip tooth B surface 204 of the first stop washer 202, and the first locking nut 201 is prevented from rotating by the tooth surface meshing.

[0031] The second fixing member 6 includes a second locking nut 601 and a second stop washer 602. The second locking nut 601 has a second anti-slip tooth A surface 603 on the side near the second stop washer 602, and the second stop washer 602 has a second anti-slip tooth B surface 604 on the side that mates with the second anti-slip tooth A surface 603. The rotor magnetic yoke tension bolt 5 has an anti-slip tooth contact surface 605 on the side away from the second anti-slip tooth B surface 604. The anti-slip tooth contact surface 605 contacts the rotor bracket 7. A central column is fixedly connected inside the magnetic yoke 4 and threadedly connected to the rotor magnetic yoke tension bolt 5. One end of the rotor magnetic yoke tension bolt 5 is connected to the central column, and the other end is connected to the second locking nut 601. The second anti-slip tooth A surface 603 of the second locking nut 601 meshes with the second anti-slip tooth B surface 604 of the second stop washer 602, and the second locking nut 601 is prevented from rotating by the meshing of the tooth surfaces.

[0032] Please see Figure 4 The pad 3 is provided with a through hole 301 for the magnetic yoke tension screw 1 to pass through, and the through hole 301 corresponds to the screw through hole on the magnetic yoke 4.

[0033] Please see Figure 4 and Figure 5 The limiting component includes four sets of limiting rods 205 connected to one side of the first stop washer 202. The pad 3 has a limiting hole 302 on one side that mates with the limiting rod 205. The limiting rod 205 is inserted into the limiting hole 302 to restrict circumferential rotation and prevent the first stop washer 202 from deflecting. The limiting rod 205 mates with the limiting hole 302, which also facilitates the rapid alignment of the first stop washer 202.

[0034] Furthermore, both the first anti-slip tooth A surface 203 and the second anti-slip tooth A surface 603 include a plurality of tooth grooves arranged in a circular array. The tooth grooves have a right-angled triangular cross-section, and the meshing strength is enhanced through the self-locking effect of the inclined surfaces of the tooth grooves. Compared with traditional thread anti-loosening methods, the arrangement of the first anti-slip tooth A surface 203, the first anti-slip tooth B surface 204, the second anti-slip tooth A surface 603, the second anti-slip tooth B surface, and the anti-slip tooth contact surface 605 provides a larger contact area and more uniform stress distribution.

[0035] Please see Figure 2 and Figure 6 A stop rod 606 is welded to one side of the second locking nut 601. A rotor bracket 7 is welded to the end of the stop rod 606 away from the second locking nut 601. The welding of the stop rod 606 forms a mechanical hard stop, which further improves the anti-loosening effect of the second locking nut 601.

[0036] The working principle of this utility model is as follows: The magnetic yoke tensioning screw 1 passes through several magnetic yokes 4. After stacking, pads 3 are set at both ends of the magnetic yoke section. The first stop washer 202 is installed. The limiting rod 205 is placed in the limiting hole 302. The first locking nut 201 is tightened on the magnetic yoke tensioning screw 1. The first anti-slip tooth A surface 203 of the first locking nut 201 meshes with the first anti-slip tooth B surface 204 of the first stop washer 202. The first locking nut 201 is prevented from rotating by the tooth surface meshing. One end of the rotor magnetic yoke tensioning bolt 5 is connected to the central column. After passing through the rotor bracket 7, the other end is connected to the second locking nut 601. The second anti-slip tooth A surface 603 of the second locking nut 601 meshes with the second anti-slip tooth B surface 604 of the second stop washer 602. The second locking nut 601 is prevented from rotating by the tooth surface meshing. A stop rod 606 is welded to one side of the second locking nut 601. The rotor bracket 7 is welded to the other end of the stop rod 606.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A segmented tensioning structure for the rotor yoke, comprising a yoke tensioning screw (1) and a rotor yoke tensioning bolt (5); Its features are: The magnetic yoke tensioning screw (1) passes through several magnetic yokes (4), and a first fixing member (2) is connected to the magnetic yoke tensioning screw (1). The first fixing member (2) has a pad (3) placed on one side of the magnetic yoke (4) near the magnetic yoke (4). The rotor magnetic yoke tensioning bolt (5) connects the magnetic yoke (4) and the rotor support (7). The end of the rotor magnetic yoke tensioning bolt (5) extending to the rotor support (7) is connected to a second fixing member (6). The first fixing member (2) includes a first locking nut (201) and a first stop washer (202). The first locking nut (201) is provided with a first anti-slip tooth A surface (203) on the side near the first stop washer (202). The first stop washer (202) is provided with a first anti-slip tooth B surface (204) that cooperates with the first anti-slip tooth A surface (203) on one side. The first stop washer (202) is provided with a limiting member that connects to the pad (3) on one side. The second fixing member (6) includes a second locking nut (601) and a second stop washer (602). The second locking nut (601) has a second anti-slip tooth A surface (603) on the side near the second stop washer (602). The second stop washer (602) has a second anti-slip tooth B surface (604) on the side that mates with the second anti-slip tooth A surface (603). The rotor magnetic yoke tensioning bolt (5) has an anti-slip tooth contact surface (605) on the side away from the second anti-slip tooth B surface (604).

2. The segmented tensioning structure of the rotor yoke according to claim 1, characterized in that: The pad (3) is provided with a through hole (301) for the magnetic yoke tension screw (1) to pass through, and the through hole (301) corresponds to the screw through hole on the magnetic yoke (4).

3. The segmented tensioning structure of the rotor yoke according to claim 1, characterized in that: The limiting component includes four sets of limiting rods (205) connected to one side of the first stop pad (202), and the pad (3) has a limiting hole (302) on one side that mates with the limiting rods (205).

4. The segmented tensioning structure of the rotor yoke according to claim 1, characterized in that: The first anti-slip tooth A surface (203) and the second anti-slip tooth A surface (603) both include a plurality of tooth grooves, which are arranged in a ring array, and the cross-section of the tooth groove is a right triangle.

5. The segmented tensioning structure of the rotor yoke according to claim 1, characterized in that: A stop rod (606) is welded to one side of the second locking nut (601), and a rotor bracket (7) is welded to the end of the stop rod (606) away from the second locking nut (601).

6. The segmented tensioning structure of the rotor yoke according to claim 1, characterized in that: The magnetic yoke (4) has a central column that is threadedly connected to the rotor magnetic yoke tensioning bolt (5).

7. The segmented tensioning structure of the rotor yoke according to claim 1, characterized in that: The magnetic yoke tensioning screw (1) is arranged parallel to the rotor axis, and the rotor magnetic yoke tensioning bolt (5) is arranged radially along the rotor.

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