A support and limiting structure for dynamic balancing testing of generator rotor

Abstract

This utility model discloses a support and limiting structure for dynamic balancing testing of generator rotors, relating to the field of dynamic balancing testing technology. It addresses the problems of support and limiting structures for dynamic balancing testing being difficult to apply to rotors of different specifications, and the difficulty in placing the rotor. The structure includes a base with two parallel tracks on its top surface. Two symmetrically distributed support plates are slidably mounted on the tracks, and limiting mechanisms are provided on the outer walls of the distant sides of the two support plates. This utility model uses a lead screw to drive the support plates to move, allowing the two support plates to move closer or further apart, making it applicable to rotors of different specifications. A servo motor drives a gear to rotate, which in turn drives two corresponding racks to move closer together, placing two movable rollers directly above two fixed rollers. An electric push rod pulls the movable rollers downwards, and the cooperation between the movable and fixed rollers provides support and limiting for the rotor.

Description

Technical Field

[0001] This utility model relates to the field of dynamic balancing testing technology, specifically a support and limiting structure for dynamic balancing testing of generator rotors. Background Technology

[0002] When a generator rotor rotates at high speed, if the mass distribution is uneven, centrifugal force will be generated, causing rotor vibration. This vibration not only affects the performance of the generator, but may also accelerate bearing wear, cause noise, or even damage the equipment. It is necessary to perform dynamic balancing tests on the rotor. By measuring the vibration amplitude and phase of the rotor, the location and magnitude of the imbalance can be determined, and the mass distribution can be adjusted by adding or removing mass (counterweight) on the rotor so that the rotor can achieve dynamic balance when rotating.

[0003] In the existing technology, a support and limiting structure is required when the rotor is dynamically balanced. However, the existing support and limiting structure for dynamic balancing has many problems. On the one hand, its structure cannot be flexibly adjusted according to rotors of different sizes, making it difficult for the support and limiting structure to meet the testing needs of generator rotors of different specifications within a certain range. On the other hand, the process of placing the rotor into the support and limiting structure is relatively difficult, affecting the convenience of rotor placement, which in turn leads to low efficiency and inconvenience in dynamic balancing.

[0004] Therefore, a support and limiting structure for dynamic balancing testing of generator rotors is needed to solve the problems that existing dynamic balancing testing support and limiting structures are not easily applicable to rotors of different specifications, and the rotor placement process is relatively difficult. Utility Model Content

[0005] The purpose of this utility model is to provide a support and limiting structure for dynamic balancing testing of generator rotors, so as to solve the problems that the support and limiting structure for dynamic balancing testing proposed in the prior art is not easy to be applied to rotors of different specifications, and the rotor placement process is relatively difficult.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a support and limiting structure for dynamic balancing testing of generator rotor, including a base, two parallel tracks are provided on the top surface of the base, two symmetrically distributed support plates are slidably installed on the two tracks, and a limiting mechanism is provided on the outer wall of the two support plates on their far sides. Each set of limiting mechanisms includes two guide slots distributed in a mirror-symmetric manner and a servo motor. Both guide slots are formed on one outer wall of the support plate. Both guide slots are connected to a moving rod via a sliding block. A rack is fixedly connected to the adjacent side of each of the two moving rods. An auxiliary rod is fixedly connected to the rear end of the top surface of the lower moving rod. An electric actuator is installed at one end of the upper moving rod and the other end of the auxiliary rod. A mounting plate is fixedly connected to the output end of the electric actuator. A movable roller is rotatably connected to the outer wall of the mounting plate on the side away from the support plate. The servo motor is mounted on one outer wall of the support plate via a mounting bracket. A gear is coaxially fixedly connected to the output end of the servo motor.

[0007] It should be noted in the solution that the top surface of the base has two symmetrically distributed sliding grooves, and a lead screw is rotatably connected between the two inner side walls of the two sliding grooves.

[0008] It is worth noting that both lead screws have threaded sleeves threaded to their outer surfaces, and the outer walls of the two lead screws on opposite sides rotatably penetrate the outer walls of both sides of the base and are coaxially fixedly connected to a rotating wheel.

[0009] Furthermore, it should be noted that a U-shaped groove is provided at the center of the top surface of both support plates, and two parallel fixed rollers are rotatably connected to the outer wall of the opposite side of the two support plates.

[0010] In a preferred embodiment, the bottom surfaces of the two electric actuators on the same support plate are at the same height, and the two mounting plates on the same support plate are symmetrically arranged.

[0011] In a preferred embodiment, both racks on the same support plate are meshed with corresponding gears, and the two threaded sleeves are fixedly connected to the two support plates respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The support plates are moved by rotating a lead screw, and the two support plates can move closer or separate from each other, which can be used for rotors of different specifications. The gear is driven to rotate by a servo motor, and the gear drives the two corresponding racks to move closer to each other, so that the two corresponding movable rollers are directly above the two corresponding fixed rollers. The movable rollers are pulled down by an electric push rod. With the cooperation of the movable rollers and the fixed rollers, the rotor is supported and limited. This effectively avoids the problem that the support and limiting structure used for dynamic balancing is not suitable for rotors of different specifications and that the rotor placement process is difficult. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a top view of the base structure of this utility model; Figure 3 This is a side view schematic diagram of one of the threaded sleeve structures of this utility model; Figure 4 This is a schematic diagram of the exploded structure of the support plate and moving rod of this utility model.

[0014] The following are the labels in the diagram: 1. Base; 2. Track; 3. Support plate; 4. U-shaped groove; 5. Limiting mechanism; 51. Guide groove; 52. Moving rod; 53. Rack; 54. Auxiliary rod; 55. Electric actuator; 56. Mounting plate; 57. Movable roller; 58. Servo motor; 59. Gear; 6. Slide groove; 7. Lead screw; 8. Threaded sleeve; 9. Rotary wheel; 10. Fixed roller. Detailed Implementation

[0015] 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.

[0016] Example: Figures 1-4 As shown, this utility model provides a technical solution, including a base 1, with two parallel tracks 2 arranged on the top surface of the base 1, and two symmetrically distributed support plates 3 slidably installed on the two tracks 2, with a limit mechanism 5 provided on the outer wall of the two support plates 3 on the side far apart. Each set of limiting mechanisms 5 includes two guide grooves 51 distributed in a mirror symmetry and a servo motor 58. Both guide grooves 51 are opened on the outer wall of one side of the support plate 3. Both guide grooves 51 are connected to a moving rod 52 through a sliding block. A rack 53 is fixedly connected to the adjacent side of the two moving rods 52. An auxiliary rod 54 is fixedly connected to the rear end of the top surface of the lower moving rod 52. An electric push rod 55 is installed at one end of the upper moving rod 52 and the other end of the auxiliary rod 54. A mounting plate 56 is fixedly connected to the output end of the electric push rod 55. A movable roller 57 is rotatably connected to the outer wall of the mounting plate 56 away from the support plate 3. The servo motor 58 is mounted on the outer wall of one side of the support plate 3 through a mounting bracket. A gear 59 is coaxially fixedly connected to the output end of the servo motor 58.

[0017] Specifically, the servo motor 58 drives the gear 59 to rotate, causing the gear 59 to drive the two racks 53 to move closer to each other. The two racks 53 respectively drive the two moving rods 52 to move closer to each other, causing the two movable rollers 57 to move closer to each other. After the two movable rollers 57 are located directly above the corresponding two fixed rollers 10, the electric push rod 55 pulls the movable rollers 57 downward to achieve the support and limit of the rotor.

[0018] Further as Figure 2 As shown, it is worth noting that the top surface of the base 1 has two symmetrically distributed sliding grooves 6, and the inner side walls of the two sliding grooves 6 are rotatably connected with screw rods 7.

[0019] Specifically, by installing lead screws 7 inside two symmetrically distributed grooves 6, the two lead screws 7 are arranged symmetrically, thereby enabling the two support plates 3 to move closer or further apart through the two lead screws 7.

[0020] Further as Figure 1 and Figure 2 As shown, it is worth noting that both lead screws 7 have threaded sleeves 8 connected to their outer surfaces. The outer walls of the two lead screws 7 on opposite sides rotatably pass through the outer walls of both sides of the base 1 and are coaxially fixedly connected to rotating wheels 9.

[0021] Specifically, rotating the wheel 9 can drive the lead screw 7 to rotate, making it convenient for staff to operate the lead screw 7. When the lead screw 7 rotates, it drives the threaded sleeve 8 to move, so as to move the support plate 3.

[0022] Further as Figure 3 and Figure 4 As shown, it is worth noting that a U-shaped groove 4 is provided at the center of the top surface of both support plates 3, and two parallel fixed rollers 10 are rotatably connected to the outer wall of the two support plates 3 on the opposite side.

[0023] Specifically, the U-shaped groove 4 facilitates the placement of the shafts on both sides of the rotor, and the two fixed rollers 10 improve the rotation effect of the rotor during dynamic balancing tests.

[0024] Further as Figure 3 As shown, it is worth noting that the bottom surfaces of the two electric actuators 55 on the same support plate 3 are at the same height, and the two mounting plates 56 on the same support plate 3 are symmetrically arranged.

[0025] Specifically, the bottom surfaces of the two electric actuators 55 on the same support plate 3 are at the same height, which facilitates precise adjustment of the height of the movable roller 57.

[0026] Further as Figure 3As shown, it is worth noting that the two racks 53 on the same support plate 3 are meshed with the corresponding gears 59, and the two threaded sleeves 8 are fixedly connected to the two support plates 3 respectively.

[0027] Specifically, the two racks 53 on the same support plate 3 are meshed with the corresponding gears 59, so that when the servo motor 58 drives the gears 59 to rotate, the two racks 53 can drive the two moving rods 52 to move closer or further apart. The two threaded sleeves 8 are fixedly connected to the two support plates 3 respectively, so that when the lead screw 7 drives the threaded sleeves 8 to move, it can drive the support plate 3 to move.

[0028] In summary: When using this support and limiting structure, firstly, according to the rotor specifications to be tested, the rotating wheel 9 drives the lead screw 7 to rotate. Under the action of the thread, the lead screw 7 drives the threaded sleeve 8 to move. Through the action of the set track 2, the threaded sleeve 8 drives the corresponding support plate 3 to move along the track 2. After adjusting the positions of the two support plates 3 in sequence, the generator rotor to be tested is placed inside the U-shaped groove 4 on the two support plates 3, so that the two shafts of the rotor are respectively located between the two fixed rollers 10 on the two support plates 3. Next, the servo motor 58 is started through the control panel. The servo motor 58 drives the gear 59 to rotate. Under the meshing action, the gear 59 drives the two corresponding racks 53 to move. The two racks 53 drive the two moving rods 52 to move closer to each other. When the two movable rollers 57 are directly above the two corresponding fixed rollers 10, the two moving rods 52 are started through the control panel. Two electric actuators 55 work downwards simultaneously, pulling two mounting plates 56 downwards. The two mounting plates 56 then drive two movable rollers 57 downwards until the bottoms of both movable rollers 57 contact the outer surface of one shaft of the corresponding rotor. After adjusting the movable rollers 57 on the two support plates 3 in sequence, the two shafts of the rotor are positioned between the corresponding movable rollers 57 and the two fixed rollers 10, thus achieving support and limiting of the rotor. Then, the rotor is dynamically balanced using a dynamic balancing testing device. The operation is simple and applicable to generator rotors of different specifications within a certain range. At the same time, the adjustable movable rollers 57 do not affect the placement of the rotor, making it convenient to place the rotor inside the support and limiting structure. This effectively avoids the problem that the support and limiting structure for dynamic balancing testing is not suitable for rotors of different specifications and that the rotor placement process is difficult.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A support limiting structure for detecting dynamic balance of a generator rotor, comprising a base (1), the top surface of the base (1) is provided with two tracks (2) distributed in parallel, two support plates (3) are symmetrically distributed and are slidingly installed on the two tracks (2), characterized in that: Limiting mechanisms (5) are provided on the outer walls of the two support plates (3) on opposite sides; Each set of limiting mechanisms (5) includes two guide grooves (51) distributed in a mirror symmetry and a servo motor (58). The two guide grooves (51) are both opened on the outer wall of one side of the support plate (3). The two guide grooves (51) are connected to a moving rod (52) through a sliding block. The two moving rods (52) are fixedly connected to a rack (53) on the side of their proximity. The lower moving rod (52) is fixedly connected to an auxiliary rod (54) at the rear end of its top surface. The upper moving rod (52) and the auxiliary rod (54) are both equipped with an electric push rod (55). The output end of the electric push rod (55) is fixedly connected to a mounting plate (56). The outer wall of the mounting plate (56) away from the support plate (3) is rotatably connected to a movable roller (57). The servo motor (58) is mounted on the outer wall of one side of the support plate (3) through a mounting bracket. The output end of the servo motor (58) is coaxially fixedly connected to a gear (59).

2. The support limiting structure for dynamic balance detection of a generator rotor according to claim 1, characterized in that: The base (1) has two symmetrically distributed sliding grooves (6) on its top surface, and a lead screw (7) is rotatably connected between the two inner side walls of the two sliding grooves (6).

3. The support and limiting structure for dynamic balancing testing of a generator rotor according to claim 2, characterized in that: Both lead screws (7) have threaded sleeves (8) threaded on their outer surfaces. The outer walls of the two lead screws (7) on opposite sides rotate through the outer walls of the base (1) and are coaxially fixedly connected to a wheel (9).

4. The support limiting structure for dynamic balance detection of a generator rotor according to claim 3, characterized in that: U-shaped grooves (4) are provided at the center of the top surface of the two support plates (3), and two fixed rollers (10) are rotatably connected to the outer walls of the two support plates (3) on opposite sides.

5. The support and limit structure for dynamic balancing of a generator rotor according to claim 4, characterized in that: The bottom surfaces of the two electric actuators (55) on the same support plate (3) are at the same height, and the two mounting plates (56) on the same support plate (3) are symmetrically arranged.

6. The support and limit structure for dynamic balancing of a generator rotor according to claim 5, characterized in that: The two racks (53) on the same support plate (3) are meshed with the corresponding gears (59), and the two threaded sleeves (8) are fixedly connected to the two support plates (3) respectively.

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