A generator rotor fixing device

Abstract

The utility model discloses a generator rotor fixing device, including base, radial clamping mechanism and axial clamping mechanism, fixed clamping plate is fixedly connected with base, movable clamping plate sets up the top of fixed clamping plate, pull rod is fixedly connected with movable clamping plate bottom, and pull rod bottom one side is set up in fixed clamping plate and base, and pull plate is fixedly connected with pull rod's bottom, locking screw is rotatably connected with base and is connected with pull plate screw, is provided with the waist shape hole on the base, and rear positioning board sets up one side on base and is fixedly connected with base, and sliding seat is slidably connected on base one side away from rear positioning board, and front positioning board is fixedly connected with sliding seat, and locking screw is fixedly connected with sliding seat and the bottom of locking screw passes through waist shape hole, and locking nut is connected with locking screw cooperation, and locking nut is used for locking the locking of locking screw and base. Through radial clamping mechanism and axial clamping mechanism, limit the radial displacement and axial displacement of rotor shaft respectively, make rotor shaft keep fixed position when keyway processing.

Description

Technical Field

[0001] This utility model belongs to the field of generator manufacturing technology, specifically a generator rotor fixing device. Background Technology

[0002] With the rapid iteration of new energy power generation technologies and the continuous expansion of the high-efficiency motor market, precision machining of generator rotors has become a key aspect of improving equipment performance. In recent years, the global rotor market has continued to grow, with the Chinese rotor market reaching tens of billions of yuan in 2023, and projected to exceed 100 billion yuan by 2029. Driven by the "dual carbon" target (carbon reduction and emission reduction), clean energy sectors such as wind power and nuclear power are placing higher demands on the machining precision of generator rotors. The positional tolerances of keyways and shoulders must be controlled within 0.05mm to ensure dynamic balance and electromagnetic compatibility during rotor operation.

[0003] In existing technologies, most devices achieve radial clamping using only a single clamping plate or bolts, lacking an axial limiting structure. This makes the rotor shaft prone to movement during machining, causing keyway depth deviations or positional offsets. For example, a hydraulic clamping mechanism is used to hold the rotor shaft, but without axial positioning elements, manual assistance is required for fixation during machining, making it difficult to meet accuracy requirements. Furthermore, existing devices are often designed for specific rotor specifications. When machining rotor shafts of different lengths, the entire fixture set often needs to be changed, resulting in long changeover times and low equipment utilization. For instance, one combined machining device requires manual rotation of the rotor shaft for end face grinding, and cannot automatically adapt to workpieces of different lengths, restricting the flexibility of multi-variety, small-batch production.

[0004] The patent application number CN202321900776.X discloses a special fixing device for steam turbine generator rotor. Its base adopts a flat plate design and lacks reinforcing ribs and anti-torsion structure. It is prone to deformation during axial positioning, resulting in a parallelism deviation of more than 0.1mm between the front positioning plate and the rear positioning plate, which affects the perpendicularity accuracy of the keyway and the shaft shoulder. Utility Model Content

[0005] The purpose of this utility model is to provide a generator rotor fixing device to solve the following technical problems mentioned in the background art:

[0006] The existing rotor shaft machining fixing device lacks an axial limiting structure, which makes the rotor shaft prone to movement during machining, causing keyway depth deviation or positional offset.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A generator rotor fixing device includes a base, a radial clamping mechanism, and an axial clamping mechanism. The radial clamping mechanism includes a movable clamping plate, a fixed clamping plate, a pull rod, a pull plate, and an adjusting screw. The axial clamping mechanism includes a rear positioning plate, a front positioning plate, a sliding seat, a locking screw, and a locking nut. The fixed clamping plate is fixedly connected to the base, the movable clamping plate is positioned above the fixed clamping plate, the pull rod is fixedly connected to the bottom of the movable clamping plate, and one side of the bottom of the pull rod movably passes through the fixed clamping plate and the base. The pull plate is fixedly connected to the bottom of the pull rod, and the locking screw is rotatably connected to the base and threadedly connected to the pull plate. The base has an oblong hole, the rear positioning plate is positioned on one side of the base and fixedly connected to the base, the sliding seat is slidably connected to the side of the base away from the rear positioning plate, the front positioning plate is fixedly connected to the sliding seat, the locking screw is fixedly connected to the sliding seat, and the bottom of the locking screw passes through the oblong hole. The locking nut is engaged with the locking screw and is used to lock the locking screw to the base.

[0009] Furthermore, a V-shaped lower clamping groove is provided at the top center of the fixed clamping plate, and a V-shaped upper clamping groove is provided at the bottom center of the movable clamping plate.

[0010] Furthermore, both the upper and lower clamping grooves are provided with several intersecting anti-slip patterns.

[0011] Furthermore, a rotating handle is fixed to the bottom of the adjusting screw.

[0012] Furthermore, at least two radial clamping mechanisms are provided on the base.

[0013] Furthermore, reinforcing ribs are provided between the rear positioning plate and the base.

[0014] Furthermore, reinforcing ribs are provided between the front positioning plate and the sliding seat.

[0015] Furthermore, the base is equipped with a slide rail, the bottom of the sliding seat is adapted to the slide rail, and the sliding seat and the slide rail are slidably connected.

[0016] Furthermore, the slide rail has an I-shaped cross-section.

[0017] Furthermore, a washer is provided between the locking nut and the base.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention uses radial and axial clamping mechanisms to limit the radial displacement and axial movement of the rotor shaft, respectively, keeping the rotor shaft in a fixed position during keyway machining. This avoids dimensional deviations caused by workpiece movement and ensures the accuracy of the keyway position. In radial clamping, the adjusting screw moves the movable clamping plate via a pull plate and pull rod, engaging with the fixed clamping plate to clamp the rotor shaft. The threaded transmission structure allows for precise control of the clamping force, ensuring stable clamping. In axial clamping, the sliding seat slides along the base to adjust the position of the front positioning plate, which is then fixed by a locking screw and a locking nut, achieving axial positioning of rotor shafts of different lengths. The structure is convenient to operate and provides secure positioning. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is one of the cross-sectional schematic diagrams of this utility model;

[0022] Figure 3 This is the second cross-sectional view of the present invention.

[0023] The markings in the diagram are: 1-base, 2-sliding seat, 3-slide rail, 4-waist-shaped hole, 5-front positioning plate, 6-movable clamping plate, 7-fixed clamping plate, 8-rear positioning plate, 9-pull rod, 10-rotor shaft, 11-upper clamping groove, 12-lower clamping groove, 13-pull plate, 14-rotation handle, 15-adjusting screw, 16-locking screw, 17-locking nut. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0025] Example:

[0026] A generator rotor fixing device, such as Figure 1 As shown, it includes a base 1, a radial clamping mechanism, and an axial clamping mechanism; as Figure 1 and Figure 2 As shown, the radial clamping mechanism includes a movable clamping plate 6, a fixed clamping plate 7, a pull rod 9, a pull plate 13, and an adjusting screw 15; Figure 1 and Figure 2As shown, the axial clamping mechanism includes a rear positioning plate 8, a front positioning plate 5, a sliding seat 2, a locking screw 16, and a locking nut 17. The fixed clamping plate 7 is fixedly connected to the base 1, the movable clamping plate 6 is positioned above the fixed clamping plate 7, the pull rod 9 is fixedly connected to the bottom of the movable clamping plate 6, and one side of the bottom of the pull rod 9 is movably inserted through the fixed clamping plate 7 and the base 1. The pull plate 13 is fixedly connected to the bottom of the pull rod 9, the locking screw 16 is rotatably connected to the base 1 and threadedly connected to the pull plate 13. The base 1 is provided with an oblong hole 4, the rear positioning plate 8 is positioned on one side of the base 1 and fixedly connected to the base 1, the sliding seat 2 is slidably connected to the side of the base 1 away from the rear positioning plate 8, the front positioning plate 5 is fixedly connected to the sliding seat 2, the locking screw 16 is fixedly connected to the sliding seat 2 and the bottom of the locking screw 16 passes through the oblong hole 4, and the locking nut 17 is engaged with the locking screw 16. The locking nut 17 is used to lock the locking screw 16 to the base 1.

[0027] Specifically, the fixed clamping plate 7 is fixedly connected to the base 1, the movable clamping plate 6 is located above the fixed clamping plate 7, and the pull rod 9 is fixedly connected to the bottom of the movable clamping plate 6. One side of the bottom of the pull rod 9 passes through the fixed clamping plate 7 and the base 1 and is then fixedly connected to the pull plate 13. When it is necessary to fix the rotor shaft 10, the rotor shaft 10 is first placed between the fixed clamping plate 7 and the movable clamping plate 6. Then, the adjusting screw 15 is rotated. Since the adjusting screw 15 and the pull plate 13 are threadedly connected, and the pull plate 13 is connected to the movable clamping plate 6 through the pull rod 9, the rotation of the adjusting screw 15 will cause the pull plate 13 to move. The pull plate 13, in turn, will cause the movable clamping plate 6 to move through the pull rod 9, ultimately allowing the movable clamping plate 6 and the fixed clamping plate 7 to cooperate in clamping the rotor shaft 10 in the radial direction. The rear positioning plate 8 is fixedly set on one side of the base 1, the sliding seat 2 is slidably connected to the side of the base 1 away from the rear positioning plate 8, and the front positioning plate 5 is fixedly connected to the sliding seat 2. After the rotor shaft 10 is clamped in the radial direction, the sliding seat 2 is moved so that the front positioning plate 5 on the sliding seat 2 abuts against the other end of the rotor shaft 10. Then, by using the engagement of the locking screw 16 with the base 1 and the engagement of the locking nut 17 with the locking screw 16, the position of the sliding seat 2 is fixed, which also fixes the position of the front positioning plate 5, thereby restricting the movement of the rotor shaft 10 in the axial direction. Through the above-mentioned radial and axial fixing operations, the axial and radial directions of the rotor shaft 10 are restricted, thus meeting the positional accuracy requirements for subsequent operations such as keyway machining on the rotor shaft 10.

[0028] In a preferred embodiment, such as Figure 3As shown, a V-shaped lower clamping groove 12 is provided at the top center of the fixed clamping plate 7, and a V-shaped upper clamping groove 11 is provided at the bottom center of the movable clamping plate 6. The V-shaped lower clamping groove 12 at the top center of the fixed clamping plate 7 and the V-shaped upper clamping groove 11 at the bottom center of the movable clamping plate 6 can form line contact with the outer circular surface of the rotor shaft 10 through the V-shaped structure, increasing the contact area during clamping, distributing the clamping force evenly, and avoiding local stress concentration. At the same time, the guiding and positioning effect of the V-shaped groove can accurately center the rotor shaft 10, improve the stability and positioning accuracy of radial clamping, and ensure the accurate position of the rotor shaft 10 when machining the keyway.

[0029] In a preferred embodiment, both the upper clamping groove 11 and the lower clamping groove 12 are provided with a plurality of intersecting anti-slip patterns. The intersecting anti-slip patterns in the upper clamping groove 11 and the lower clamping groove 12 can increase the roughness of the contact surface, improve the friction between the rotor shaft 10 and the rotor shaft 10, prevent the rotor shaft 10 from sliding and shifting during clamping, and at the same time disperse the clamping force to avoid slippage affecting the positioning accuracy, further enhancing the reliability of radial clamping and ensuring that the rotor shaft 10 is stably fixed during processing.

[0030] In a preferred embodiment, such as Figure 2 as well as Figure 3 As shown, a rotating handle 14 is fixedly attached to the bottom of the adjusting screw 15. The rotating handle 14 at the bottom of the adjusting screw 15 increases the force application area, making it easier for the operator to rotate the adjusting screw 15 by hand or with tools. This saves effort and allows for precise control of the number of rotations of the adjusting screw 15, thereby smoother movement of the pull plate 13 and the movable clamping plate 6, and realizing the adjustment and control of the radial clamping force on the rotor shaft 10.

[0031] In a preferred embodiment, at least two sets of radial clamping mechanisms are provided on the base 1. The presence of at least two sets of radial clamping mechanisms on the base 1 allows for the even distribution of radial force on the rotor shaft 10 through multi-point clamping, avoiding uneven force distribution or deformation of the rotor shaft 10 caused by single-point clamping. This enhances the overall stability and reliability of the clamping process and is applicable to rotor shafts 10 of different lengths or specifications, improving the versatility and applicability of the device and ensuring that the rotor shaft 10 remains stable and does not wobble during processing.

[0032] In a preferred embodiment, such as Figure 1 As shown, a reinforcing rib is provided between the rear positioning plate 8 and the base 1. The reinforcing rib between the rear positioning plate 8 and the base 1 can enhance the structural strength of the connection between the two, improve the deformation resistance of the rear positioning plate 8, prevent the rear positioning plate 8 from being displaced or deformed due to force during axial clamping, ensure the stability and reliability of the axial positioning of the rotor shaft 10, and ensure the accuracy of the positioning reference during the processing.

[0033] In a preferred embodiment, such as Figure 1As shown, a reinforcing rib is provided between the front positioning plate 5 and the sliding seat 2. The reinforcing rib between the front positioning plate 5 and the sliding seat 2 can enhance the structural rigidity of the connection between the two, prevent the front positioning plate 5 from deforming or displacing when it is pressed against the rotor shaft 10, and ensure the stability of axial positioning.

[0034] In a preferred embodiment, such as Figure 1 As shown, a slide rail 3 is provided on the base 1, and the bottom of the sliding seat 2 is adapted to the slide rail 3, and the sliding seat 2 and the slide rail 3 are slidably connected. The slide rail 3 on the base 1 is adapted to the bottom of the sliding seat 2, so that the sliding seat 2 can slide smoothly along the slide rail 3, which facilitates precise adjustment of the position of the front positioning plate 5 to abut against the rotor shaft 10 of different lengths.

[0035] In a preferred embodiment, the slide rail 3 has an I-shaped cross-section. The I-shaped cross-section of the slide rail 3 can limit the lateral displacement of the sliding seat 2 through the upper and lower flanges, thereby enhancing the guiding accuracy and stability during sliding, while the middle web provides sufficient support strength.

[0036] In a preferred embodiment, a washer is provided between the locking nut 17 and the base 1. The washer between the locking nut 17 and the base 1 can increase the contact area, distribute the pressure during locking, prevent the surface of the base 1 from being damaged due to excessive local stress, and at the same time, the washer can fill the minor unevenness of the contact surface.

[0037] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," 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.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A generator rotor fixing device, characterized in that: It includes a base (1), a radial clamping mechanism and an axial clamping mechanism; the radial clamping mechanism includes a movable clamping plate (6), a fixed clamping plate (7), a pull rod (9), a pull plate (13) and an adjusting screw (15); the axial clamping mechanism includes a rear positioning plate (8), a front positioning plate (5), a sliding seat (2), a locking screw (16) and a locking nut (17). The fixed clamp (7) is fixedly connected to the base (1), the movable clamp (6) is set above the fixed clamp (7), the pull rod (9) is fixedly connected to the bottom of the movable clamp (6), the bottom side of the pull rod (9) is movably inserted through the fixed clamp (7) and the base (1), the pull plate (13) is fixedly connected to the bottom of the pull rod (9), the locking screw (16) is rotatably connected to the base (1) and threadedly connected to the pull plate (13); The base (1) is provided with an oblong hole (4), the rear positioning plate (8) is set on one side of the base (1) and fixed to the base (1), the sliding seat (2) is slidably connected to the side of the base (1) away from the rear positioning plate (8), the front positioning plate (5) is fixed to the sliding seat (2), the locking screw (16) is fixed to the sliding seat (2) and the bottom of the locking screw (16) passes through the oblong hole (4), the locking nut (17) is engaged with the locking screw (16) and the locking nut (17) is used to lock the locking screw (16) to the base (1).

2. The generator rotor fixing device according to claim 1, characterized in that: A V-shaped lower clamping groove (12) is provided at the top center of the fixed clamping plate (7), and a V-shaped upper clamping groove (11) is provided at the bottom center of the movable clamping plate (6).

3. The generator rotor fixing device according to claim 2, characterized in that: Both the upper clamping groove (11) and the lower clamping groove (12) are provided with several intersecting anti-slip patterns.

4. The generator rotor fixing device according to claim 1, characterized in that: A rotating handle (14) is fixed to the bottom of the adjusting screw (15).

5. A generator rotor fixing device according to claim 1, characterized in that: At least two radial clamping mechanisms are provided on the base (1).

6. The generator rotor fixing device according to claim 1, characterized in that: A reinforcing rib is provided between the rear positioning plate (8) and the base (1).

7. A generator rotor fixing device according to claim 1, characterized in that: A reinforcing rib is provided between the front positioning plate (5) and the sliding seat (2).

8. A generator rotor fixing device according to claim 1, characterized in that: The base (1) is provided with a slide rail (3), the bottom of the sliding seat (2) is adapted to the slide rail (3), and the sliding seat (2) and the slide rail (3) are slidably connected.

9. A generator rotor fixing device according to claim 8, characterized in that: The cross-section of the slide rail (3) is an I-shaped structure.

10. A generator rotor fixing device according to claim 1, characterized in that: A gasket is provided between the locking nut (17) and the base (1).

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