A water turbine bearing replacement auxiliary tool

Abstract

The utility model provides a kind of water turbine bearing replacement auxiliary tooling. Including movable frame, the stroke cylinder is installed on the movable frame, the mounting plate is slidably installed in the movable frame, the bottom plate is installed below the mounting plate. In the utility model, by setting centering clamping mechanism, it can be outside clamping mode to quickly adhere the outer diameter profile of different specifications bearings, realize accurate positioning, efficiently complete bearing disassembly operation;It can also be switched to inner clamping mode under the special working condition that bearing is first assembled and shaft core is entered later, through the pawl deeply into bearing inner ring, perfect adaptation large diameter bearing or the installation demand of space limited scene, completely break the application boundary of traditional tooling. At the same time, the heating module built-in pawl can be started simultaneously when starting inner clamping function, quickly improve the temperature of bearing inner ring, effectively reduce interference fit resistance using the principle of thermal expansion and contraction, so that the installation process of bearing and rotating shaft is more smooth and stable.

Description

Technical Field

[0001] This utility model relates to bearing replacement tooling, and in particular to an auxiliary tooling for replacing water turbine bearings, belonging to the field of bearing replacement technology. Background Technology

[0002] A turbine bearing replacement auxiliary fixture is a customized tool or device specifically designed to assist in the disassembly, installation, and commissioning of turbine bearings. Its core function is to reduce the manual labor intensity during turbine bearing replacement and improve operational efficiency and safety by optimizing the operating process, providing precise positioning, transmitting mechanical force, or assisting in calibration.

[0003] Publication number CN201940964U discloses a bearing replacement tool, which consists of a lead screw, a fixed plate, and three pull claws. The fixed plate and the lead screw form a lead screw drive structure. The three pull claws are fixed to the fixed plate by bolts. The pull claw arms are outward-facing arc-shaped structures, and the three pull claws are distributed at equal angles. The pointed ends of the pull claws engage with the bearing end face, and axial displacement is achieved by rotating the lead screw, thereby achieving the purpose of removal. This bearing replacement tool has a simple structure, is easy to manufacture, convenient to operate and use, saves time and effort, is safe, and has high work efficiency. Due to the arc-shaped structure of the pull claws, the force characteristics can be utilized to effectively avoid factors that could cause safety accidents such as uneven loading, side slippage, and breakage or straightening of the lead screw or pull claws. It achieves ideal results at a very low cost.

[0004] Existing bearing replacement devices mostly rely on manual operation of the pull claws and screws for disassembly and installation. When dealing with large equipment such as horizontal motors and water turbines, this requires multiple people working together, and the difficulty in precisely controlling the force applied during operation easily leads to damage to the bearings and journals. Furthermore, the device requires repeated manual calibration of its center position and level before use. For large equipment with complex spatial layouts, this alignment process is time-consuming and labor-intensive, resulting in extremely low installation efficiency. In addition, the pull claws with their fixed structure are only compatible with standard-sized bearings for small motors. When encountering large-diameter, heavy-duty bearings, the pull claws are prone to slippage and breakage, posing safety hazards and failing to meet the high-intensity operating requirements of large equipment. Therefore, improvements are needed.

[0005] Therefore, an auxiliary tooling for replacing turbine bearings is proposed. Utility Model Content

[0006] In view of this, the present invention provides an auxiliary tooling for replacing turbine bearings, in order to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial option.

[0007] The technical solution of this utility model is implemented as follows: an auxiliary tooling for replacing turbine bearings includes a movable frame, a stroke cylinder mounted on the movable frame, an mounting plate slidably mounted inside the movable frame, a base plate mounted below the mounting plate, a chuck connected to the base plate by a centering clamping mechanism, a heating tube disposed inside the chuck, an electric push rod mounted on the back of the base plate, a top rod mounted on the output end of the electric push rod, and a collar mounted on the top rod.

[0008] More preferably, the centering clamping mechanism includes a plane bearing, a worm gear, a turntable, a guide groove, a connecting plate, a motor, a worm, a fixed plate, a limiting groove, a limiting block, and a guide rod. The plane bearing is disposed inside the base plate, the worm gear is rotatably mounted inside the base plate via the plane bearing, the turntable is mounted on the worm gear, the guide groove is disposed on the turntable, the connecting plate is mounted below the base plate, the motor is mounted on the connecting plate, the worm gear meshes with the bottom of the worm gear, the fixed plate is mounted on the base plate, the limiting groove is disposed on the fixed plate, the limiting block is slidably disposed within the limiting groove, and the guide rod and the pawl are both mounted on the limiting block.

[0009] More preferably, the mounting plate is installed at the output end of the stroke cylinder, and rollers are provided below the movable frame.

[0010] More preferably, one end of the push rod is tapered.

[0011] More preferably, the worm gear is installed at the output end of the motor, and the guide rod is disposed in the guide groove.

[0012] More preferably, the bottom of the movable frame is provided with a storage groove, a groove plate is installed below the movable frame, a rotating shaft is also installed below the movable frame, a threaded plate is rotatably installed below the movable frame via the rotating shaft, a screw is threadedly connected to the threaded plate, a reinforcing seat is installed below the screw, a slider is slidably installed in the groove plate, a stud is installed on the slider, and a locking nut is threadedly connected to the stud.

[0013] More preferably, the groove plate is provided with a through groove, and the stud is slidably disposed in the through groove.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] I. In this utility model, by setting a centering clamping mechanism, it can quickly fit the outer diameter contour of bearings of different specifications in external clamping mode, achieving precise positioning and efficiently completing bearing disassembly operations; and in special working conditions where the bearing is assembled first and the shaft core is inserted later, it can switch to internal clamping mode, with the jaws penetrating deep into the inner ring of the bearing, perfectly adapting to the installation needs of large-diameter bearings or space-constrained scenarios, completely breaking the application boundaries of traditional tooling. At the same time, the heating module built into the jaws can be activated simultaneously when the internal clamping function is started, quickly raising the temperature of the bearing inner ring, effectively reducing the interference fit resistance by utilizing the principle of thermal expansion and contraction, making the installation process of the bearing and the shaft smoother and more stable.

[0016] II. In this utility model, by setting up a storage groove, groove plate, rotating shaft, threaded plate, reinforcing base, slider, stud, and locking nut, not only can the reinforcing base be quickly arranged during use to improve the overall stability of the mobile frame, but the reinforcing base can also be quickly stored after use, effectively saving storage space and taking into account both equipment stability and portability.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0020] Figure 2 This is a schematic diagram of the rear structure of this utility model;

[0021] Figure 3 This is an exploded view of part of the structure of this utility model;

[0022] Figure 4 This is an exploded view of the chuck claw in this utility model;

[0023] Figure 5 In this utility model Figure 4 Enlarged view of point A;

[0024] Figure 6 This is a side view of the present invention.

[0025] Figure 7 In this utility model Figure 5 Partial structural diagram.

[0026] Reference numerals: 1. Moving frame; 2. Stroke cylinder; 3. Mounting plate; 4. Base plate; 5. Surface bearing; 6. Worm gear; 7. Turntable; 8. Guide groove; 9. Connecting plate; 10. Motor; 11. Worm; 12. Fixing plate; 13. Limiting groove; 14. Limiting block; 15. Guide rod; 16. Claw; 17. Heating tube; 18. Screw; 19. Electric push rod; 20. Top rod; 21. Collar; 22. Storage groove; 23. Groove plate; 24. Rotating shaft; 25. Threaded plate; 26. Reinforcing seat; 27. Slider; 28. Stud; 29. ​​Locking nut. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] like Figure 1-7 As shown, this utility model embodiment provides an auxiliary tooling for replacing turbine bearings, including a movable frame 1, a stroke cylinder 2 mounted on the movable frame 1, an mounting plate 3 slidably mounted inside the movable frame 1, a base plate 4 mounted below the mounting plate 3, a chuck 16 connected to the base plate 4 by a centering clamping mechanism, a heating tube 17 disposed inside the chuck 16, an electric push rod 19 mounted on the back of the base plate 4, a push rod 20 mounted on the output end of the electric push rod 19, and a collar 21 mounted on the push rod 20.

[0030] In one embodiment, the centering clamping mechanism includes a plane bearing 5, a worm gear 6, a turntable 7, a guide groove 8, a connecting plate 9, a motor 10, a worm 11, a fixed plate 12, a limiting groove 13, a limiting block 14, and a guide rod 15. The plane bearing 5 is disposed inside the base plate 4. The worm gear 6 is rotatably mounted inside the base plate 4 via the plane bearing 5. The turntable 7 is mounted on the worm gear 6. The guide groove 8 is disposed on the turntable 7. The connecting plate 9 is mounted below the base plate 4. The motor 10 is mounted on the connecting plate 9. The worm 11 meshes with the bottom of the worm gear 6. The fixed plate 12 is mounted on the base plate 4. The limiting groove 13 is disposed on the fixed plate 12. The limiting block 14 is slidably disposed inside the limiting groove 13. The guide rod 15 and the pawl 16 are both mounted on the limiting block 14. When the motor 10 is started, it drives the worm gear 11 to rotate. Under the meshing action between the worm gear 11 and the worm wheel 6, the worm wheel 6 and the turntable 7 will rotate synchronously. At this time, under the mechanical coupling action between the guide groove 8 and the guide rod 15, the guide rod 15 and the limiting block 14 will slide inward along the limiting groove 13, so that multiple sets of claws 16 can slide synchronously towards the center.

[0031] In one embodiment, the mounting plate 3 is installed at the output end of the stroke cylinder 2, and rollers are provided below the moving frame 1. When the electric push rod 19 is activated, it drives the push rod 20 to push the shaft core. At this time, under the action of force, the entire moving frame 1 and the bearing in the clamp will move backward.

[0032] In one embodiment, one end of the push rod 20 is tapered. The tapered front end acts like a precise "locating pin," easily and accurately locating the center hole or similar positioning part of a shaft-like component.

[0033] In one embodiment, the worm gear 11 is installed at the output end of the motor 10, and the guide rod 15 is disposed in the guide groove 8. When the turntable 7 rotates, under the mechanical coupling between the guide groove 8 and the guide rod 15, the guide rod 15 and the limiting block 14 will slide inward along the limiting groove 13.

[0034] In one embodiment, the mobile frame 1 has a storage slot 22 at its bottom, a slotted plate 23 installed below it, and a rotating shaft 24 also installed below it. A threaded plate 25 is rotatably mounted below the mobile frame 1 via the rotating shaft 24. A screw 18 is threadedly connected to the threaded plate 25, and a reinforcing seat 26 is installed below the screw 18. A slider 27 is slidably mounted inside the slotted plate 23, and a stud 28 is mounted on the slider 27. A locking nut 29 is threadedly connected to the stud 28. The reinforcing seat 26 can be quickly installed during use, improving the overall stability of the mobile frame 1.

[0035] In one embodiment, a through groove is provided in the slot plate 23, and the stud 28 is slidably disposed in the through groove. Rotate the locking nut 29 to remove the top fixing force on the slot plate 23, and then after the limit is released, the threaded plate 25 can be rotated along the rotating shaft 24.

[0036] In operation, this invention works as follows: First, the height is adjusted to change the bearing position as needed. The vertical adjustment is achieved by using the stroke cylinder 2 to drive the mounting plate 3 and base plate 4. After adjustment, the motor 10 is started, driving the worm gear 11 to rotate. The meshing action between the worm gear 11 and the worm wheel 6 causes the worm wheel 6 and the turntable 7 to rotate synchronously. During this process, the guide groove 8 changes position. At this time, under the mechanical coupling between the guide groove 8 and the guide rod 15, the guide rod 15 and the limiting block 14 slide inward along the limiting groove 13, allowing multiple sets of chucks 16 to slide synchronously towards the center, precisely clamping the outer diameter contour of the bearing. Then… Activating the electric push rod 19 drives the push rod 20 to actuate the shaft core. Under this force, the entire moving frame 1 and the clamped bearing move backward, allowing the bearing to separate from the rotating shaft 24 and achieving bearing disassembly. During installation, first lock the lower rollers. Before centering and clamping the bearing's outer diameter profile using the three sets of jaws 16, place a sleeve on the push rod 20 and collar 21. The inner diameter of this sleeve must be larger than the push rod 20 but smaller than the collar 21, and the outer diameter must be larger than the inner diameter of the bearing. Then, under the action of the stroke cylinder 2, the bearing moves to the installation position and is pre-positioned (the bearing portion is inserted into the installation position). When the clamping force of the chuck 16 on the bearing is appropriately reduced, the electric push rod 19 is activated, driving the push rod 20 and sleeve to apply a pushing force to the bearing. Under the pressure, the bearing will be moved into the installation position. In the special working condition of assembling the bearing first and then inserting the shaft core, the chuck 16 first penetrates into the inner ring of the bearing. Through the three sets of chuck 16 simultaneously expanding outward from the inside, the inner ring of the bearing is effectively clamped. This can perfectly adapt to the installation requirements of large-diameter bearings or space-constrained scenarios. At the same time, during this process, the heating tube 17 can be activated to quickly increase the temperature of the inner ring of the bearing. The principle of thermal expansion and contraction is used to effectively reduce the interference fit resistance, making the installation process of the bearing and shaft core smoother and more stable. When the base 26 is in place, the lower reinforcing base 26 can be rotated directly to drive the upper screw 18 to rotate. At this time, the screw will cause the reinforcing base 26 to move downward, which can improve the overall stability of the mobile frame 1. When storing, first rotate the locking nut 29 to stop it from applying a top-fixing force to the slot plate 23. Then, the threaded plate 25 can be rotated along the rotating shaft 24. At this time, the slider 27 and the stud 28 will move along the slot plate 23 simultaneously, and the screw 18 and the reinforcing base 26 will be stored. When the screw 18 is stored in the storage slot 22, the locking nut 29 is rotated in the opposite direction and a top-fixing force is applied to the slot plate 23 under the action of the screw, thus completing the fixation after storage.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An auxiliary tooling for replacing turbine bearings, characterized in that: The device includes a movable frame (1), on which a stroke cylinder (2) is installed. A mounting plate (3) is slidably installed inside the movable frame (1). A base plate (4) is installed below the mounting plate (3). A claw (16) is connected inside the base plate (4) through a centering clamping mechanism. A heating tube (17) is provided inside the claw (16). An electric push rod (19) is installed on the back of the base plate (4). A top rod (20) is installed at the output end of the electric push rod (19). A collar (21) is installed on the top rod (20).

2. The auxiliary tooling for replacing turbine bearings according to claim 1, characterized in that: The centering clamping mechanism includes a plane bearing (5), a worm gear (6), a turntable (7), a guide groove (8), a connecting plate (9), a motor (10), a worm (11), a fixing plate (12), a limiting groove (13), a limiting block (14), and a guide rod (15). The plane bearing (5) is set inside the base plate (4). The worm gear (6) is rotatably mounted inside the base plate (4) through the plane bearing (5). The turntable (7) is mounted on the worm gear (6). The guide groove (8) is connected to the connecting plate (9). The motor (10) is mounted on the connecting plate (9) and the connecting plate (9) is mounted on the bottom plate (4). The worm (11) meshes with the bottom of the worm wheel (6). The fixing plate (12) is mounted on the bottom plate (4). The limiting groove (13) is mounted on the fixing plate (12). The limiting block (14) is slidably mounted in the limiting groove (13). The guide rod (15) and the pawl (16) are both mounted on the limiting block (14).

3. The auxiliary tooling for replacing turbine bearings according to claim 1, characterized in that: The mounting plate (3) is installed at the output end of the stroke cylinder (2), and rollers are provided below the moving frame (1).

4. The auxiliary tooling for replacing turbine bearings according to claim 2, characterized in that: One end of the top rod (20) is tapered.

5. The auxiliary tooling for replacing turbine bearings according to claim 2, characterized in that: The worm gear (11) is installed at the output end of the motor (10), and the guide rod (15) is set in the guide groove (8).

6. The auxiliary tooling for replacing turbine bearings according to claim 1, characterized in that: The bottom of the mobile frame (1) is provided with a storage groove (22), a groove plate (23) is installed below the mobile frame (1), a rotating shaft (24) is also installed below the mobile frame (1), a threaded plate (25) is rotatably installed below the mobile frame (1) via the rotating shaft (24), a screw (18) is threadedly connected to the threaded plate (25), a reinforcing seat (26) is installed below the screw (18), a slider (27) is slidably installed inside the groove plate (23), a stud (28) is installed on the slider (27), and a locking nut (29) is threadedly connected to the stud (28).

7. The auxiliary tooling for replacing turbine bearings according to claim 6, characterized in that: The groove plate (23) is provided with a through groove, and the stud (28) is slidably disposed in the through groove.

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