A large generator rotor shaft turning over and standing up trolley

Abstract

The utility model relates to a turning over and standing trolley of large -scale generator rotor shaft, including track frame, be equipped with moving track on the track frame, cooperation and installation have first moving disc and second moving disc on the moving track, install fixed frame on the first moving disc, rotatory installation has rotor shaft fixed component on the fixed frame, rotor shaft fixed component is equipped with rotor shaft mounting hole on, install fixed fastener on the second moving disc, cooperation and installation have the clamping groove of fastener on the fixed fastener, rotor shaft fixed component is fixed in the clamping groove with the fastener of first moving disc's movement, integratedly realizes the convenient turning over operation and standing placement of large -scale generator rotor shaft, convenient and fast safe when using.

Description

Technical Field

[0001] This utility model relates to a turning and straightening trolley for a large generator rotor shaft. Background Technology

[0002] The rotor shaft of a large generator is a core component of the generator, and its installation, disassembly, transportation, and maintenance are crucial aspects of generator maintenance. Due to the large size and heavy weight of the generator rotor shaft, there are many difficulties and safety hazards in turning it over and uprighting it.

[0003] Currently, the handling and operation of large generator rotor shafts typically employ methods such as overhead crane hoisting and pulley movement. For example, Chinese patent CN203352392U discloses a generator rotor assembly / disassembly device. This device includes a transport trolley and its drive unit. The upper surface of the transport trolley supports a separately heated turbine generator rotor retaining ring. A linear motion track is arranged along the axial direction of the turbine generator rotor on the working surface. The transport trolley moves along this linear motion track under the drive of the drive unit. This device is mainly used for assembling and disassembling the retaining ring, but it offers limited support for rotor shaft reversal and verticalization operations.

[0004] The main problems with the existing technology are: currently, the rotor shaft is turned over on a wooden board in conjunction with a crane. During the turning process, due to the large weight of the rotor shaft, it is difficult for operators to control its rotation angle and speed. Furthermore, the shaft is not supported during the turning process, so it will sway from side to side, which poses a safety hazard. At present, there is a lack of integrated equipment that can simultaneously achieve the functions of turning over and standing upright, which leads to safety risks for workers during operation and also increases the difficulty and time cost of operation.

[0005] Therefore, there is an urgent need for a large generator rotor shaft turning and straightening trolley that is simple in structure, easy to operate, and has integrated functions. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a turning and uprighting trolley for a large generator rotor shaft, which integrates convenient turning and uprighting operations for the large generator rotor shaft. This objective of the utility model is:

[0007] This utility model proposes a turning and straightening trolley for a large generator rotor shaft, including a track frame with a movable track. A first movable disk and a second movable disk are mounted on the movable track. A fixing frame is mounted on the first movable disk, and a rotor shaft fixing assembly is rotatably mounted on the fixing frame. The rotor shaft fixing assembly has a rotor shaft mounting hole. A fixing clip is mounted on the second movable disk, and the fixing clip has a slot that mates with the rotor shaft fixing assembly. The rotor shaft fixing assembly is locked and fixed in the slot as the first movable disk moves.

[0008] Furthermore, the rotor shaft fixing assembly is connected to the fixing frame via a rotating shaft, the rotor shaft mounting hole is vertically arranged, and the axial direction of the rotating shaft intersects the central axis of the rotor shaft mounting hole.

[0009] Furthermore, the fixing clip is equipped with a mounting plate, the mounting plate has a threaded hole, the fixing bracket has a threaded hole, and the threaded hole on the mounting plate is arranged opposite to the threaded hole on the fixing bracket.

[0010] Furthermore, a push rod is installed on one side of the fixing clip, the extension direction of the push rod is parallel to the extension direction of the moving track, and the length of the push rod is greater than the length of the moving track.

[0011] Furthermore, the rotor shaft fixing assembly includes a protrusion, the vertical cross-section of which is rectangular, and the vertical cross-section of the slot is rectangular.

[0012] Furthermore, a lifting frame is installed at the lower part of the track frame, which is used to raise the height of the track frame.

[0013] Furthermore, the lifting frame is a hydraulic lifting frame.

[0014] Furthermore, a movable frame is installed at the lower part of the raised frame, and rollers are rotatably installed at the lower part of the movable frame.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by using the rotor shaft fixing assembly to rotate and connect the rotor shaft to the fixing frame, the rotor shaft can be reversed, avoiding the risk caused by the lower part moving during the reversal process;

[0016] The height of the track frame can be adjusted by raising the lifting frame to adapt to the needs of different working environments. The mobile frame equipped with rollers improves the mobility of the entire device, allowing the entire device to move flexibly within the workplace, greatly improving the ease of operation and safety of the large generator rotor shaft turning and straightening process. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a trolley for turning and straightening the rotor shaft of a large generator;

[0018] Figure 2 This is a frontal view of a trolley for turning and straightening the rotor shaft of a large generator.

[0019] Figure 3 This is a side view schematic diagram of a trolley for turning and straightening the rotor shaft of a large generator.

[0020] Figure 4This is a three-dimensional structural diagram of the track frame of a large generator rotor shaft turning and uprighting trolley;

[0021] In the figure: 1. Rotor shaft fixing assembly, 2. Rotor shaft mounting hole, 3. Rotary shaft, 4. Fixing frame, 5. Track frame, 6. Lifting frame, 7. Roller, 8. Moving frame, 9. Push rod, 10. Second moving plate, 11. Mounting plate, 12. Fixing clip, 13. Slot, 14. First moving plate, 15. Protrusion, 16. Moving track. Detailed Implementation

[0022] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0023] Example 1

[0024] Please refer to Figure 1-4This utility model provides a turning and straightening trolley for a large generator rotor shaft, including a track frame 5. A movable track 16 is provided on the track frame 5. A first movable disk 14 and a second movable disk 10 are mounted on the movable track 16. A fixing frame 4 is mounted on the first movable disk 14, and a rotor shaft fixing assembly 1 is rotatably mounted on the fixing frame 4. The rotor shaft fixing assembly 1 has rotor shaft mounting holes 2. A fixing clip 12 is mounted on the second movable disk 10, and the fixing clip 12 has a slot 13 that mates with the rotor shaft fixing assembly 1. The rotor shaft fixing assembly 1 is locked and fixed in the slot 13 as the first movable disk 14 moves. The track frame 5 is made of steel and has sufficient strength and rigidity to withstand the weight of the large generator rotor shaft. The track frame 5 is 3000 mm long, 800 mm wide, and 500 mm high. The track 16 on the track frame 5 consists of two parallel U-shaped grooves, each 60 mm wide and 40 mm deep, with a distance of 600 mm between them. The inner walls of the U-shaped grooves are smooth, facilitating the sliding of the moving disk. Both the first moving disk 14 and the second moving disk 10 are disc-shaped structures with a diameter of 200 mm and a thickness of 30 mm, made of high-strength alloy steel. Each of the first and second moving disks 14 and 10 has two sliders at its bottom that mate with the U-shaped grooves. The sliders are 58 mm wide, 38 mm high, and 100 mm long, with a 1 mm gap between the sliders and the U-shaped grooves to ensure smooth sliding of the moving disks on the track. The mounting bracket 4 on the first moving disk 14 is L-shaped, with a vertical height of 600 mm, a horizontal length of 400 mm, and a thickness of 20 mm. The mounting bracket 4 is made of high-strength steel with a rust-proof surface treatment. The vertical part of the mounting bracket 4 is fixedly connected to the first moving disk 14 by welding, ensuring a secure connection. The rotor shaft fixing assembly 1 is connected to the fixing frame 4 via a rotating shaft 3. The rotating shaft 3 has a diameter of 50 mm, a length of 150 mm, and is made of alloy steel. One end of the rotating shaft 3 is welded to the rotor shaft fixing assembly 1, and the other end is connected to the horizontal part of the fixing frame 4 via a bearing, allowing the rotor shaft fixing assembly 1 to rotate around the rotating shaft 3. The rotor shaft mounting hole 2 is vertically set, with a diameter of 300 mm and a depth of 400 mm, capable of accommodating the rotor shaft of a large generator. The axial direction of the rotating shaft 3 intersects the central axis of the rotor shaft mounting hole 2, with an included angle of 90 degrees, forming a perpendicular relationship. The rotor shaft fixing assembly 1 has a cylindrical structure with a diameter of 400 mm and a height of 500 mm, and is made of high-strength alloy steel. The side of the rotor shaft fixing assembly 1 has a protrusion 15, with a rectangular cross-section in the vertical direction, a length of 150 mm, a width of 80 mm, and a height of 100 mm. The surface of the protrusion 15 is smooth, facilitating its engagement with the slot 13. The fixing clip 12 installed on the second movable disk 10 has a square structure, with a length of 300 mm, a width of 200 mm, and a height of 150 mm.The slot 13 on the fixing member 12 has a rectangular vertical cross-section, with a length of 152 mm, a width of 82 mm, and a depth of 102 mm. This is slightly larger than the protrusion 15, ensuring that the protrusion 15 can be smoothly inserted into the slot 13 and remain stable. The fixing member 12 is connected to the second movable disk 10 by bolts, ensuring a secure connection. A mounting plate 11 is mounted on the fixing member 12. The mounting plate 11 is a rectangular steel plate with a length of 200 mm, a width of 150 mm, and a thickness of 10 mm. The mounting plate 11 has threaded holes with a diameter of 12 mm and an M12 thread specification. The fixing bracket 4 also has threaded holes with the same diameter and specification as those on the mounting plate 11. The threaded holes on the mounting plate 11 and the fixing bracket 4 are aligned. When the protrusion 15 of the rotor shaft fixing assembly 1 is inserted into the slot 13, the mounting plate 11 can be connected to the fixing bracket 4 by bolts, further enhancing the stability of the connection. A push rod 9 is installed on one side of the fixing clip 12. The push rod 9 is cylindrical, with a diameter of 30 mm and a length of 3500 mm, and is made of alloy steel. The extension direction of the push rod 9 is parallel to the extension direction of the moving track 16. The length of the push rod 9 is greater than the length of the moving track 16, making it easy for the operator to push the second moving plate 10 to move outside the track. One end of the push rod 9 is welded to the fixing clip 12, and the other end is equipped with a rubber handle for easy gripping. A lifting frame 6 is installed at the lower part of the track frame 5. The lifting frame 6 is a hydraulic lifting frame 6, which can raise the height of the track frame 5. The minimum height of the hydraulic lifting frame 6 is 200 mm, the maximum height is 800 mm, and the lifting range is 600 mm. The hydraulic lifting frame 6 is driven by a hydraulic cylinder with a diameter of 100 mm and a maximum load capacity of 10 tons, which can meet the weight requirements of the rotor shaft of a large generator. The hydraulic lifting frame 6 is equipped with a manual hydraulic pump for easy operation. A movable frame 8 is installed at the lower part of the raised frame 6. The movable frame 8 has a rectangular frame structure, with a length of 3200 mm, a width of 1000 mm, and a height of 150 mm. Eight rollers 7, each with a diameter of 150 mm, are rotatably mounted on the lower part of the movable frame 8, evenly distributed around its perimeter. The rollers 7 are made of high-strength nylon, possessing good load-bearing capacity and wear resistance. The rollers 7 are connected to the movable frame 8 via bearings, allowing for 360-degree rotation, facilitating the movement and steering of the trolley.

[0025] The working principle of the large generator rotor shaft tilting and straightening trolley in this embodiment is as follows: First, rotate the rotor shaft fixing assembly 1 to keep the axis of the rotor shaft mounting hole 2 horizontal, move the trolley to the vicinity of the horizontally placed rotor shaft, and adjust the height of the hydraulic lifting frame 6 to align the rotor shaft mounting hole 2 with the rotor shaft; then, place the rotor shaft into the rotor shaft mounting hole 2 and fix it; next, place and fix the rotor shaft in the rotor shaft mounting hole 2, rotate the rotor shaft fixing assembly 1 to place the rotor shaft vertically, push the first moving disk 14 to move along the moving track 16, so that the protrusion 15 of the rotor shaft fixing assembly 1 aligns with the slot 13 on the fixing clip 12, and then insert the protrusion 15 into the slot 13, and connect the mounting plate 11 to the fixing frame 4 with bolts to form a stable connection; finally, move the trolley to complete the transportation or installation task.

[0026] Example 2

[0027] Based on Embodiment 1, in this embodiment, the rotor shaft fixing assembly 1 is connected to the fixing frame 4 via a rotating shaft 3. The rotor shaft mounting hole 2 is vertically positioned, and the axial direction of the rotating shaft 3 intersects the central axis of the rotor shaft mounting hole 2. The rotating shaft 3 has a diameter of 60 mm, a length of 180 mm, and is made of high-carbon steel. The rotating shaft 3 and the rotor shaft fixing assembly 1 are connected by a key with a specification of 16×10×50 mm to ensure reliable connection. The rotating shaft 3 and the fixing frame 4 are connected by a double-row angular contact ball bearing, model 7212C, with an inner diameter of 60 mm, an outer diameter of 110 mm, and a width of 22 mm, capable of withstanding large radial and axial loads.

[0028] The rotor shaft mounting hole 2 has a diameter of 350 mm and a depth of 450 mm. Its inner wall is lined with a 5 mm thick rubber gasket to protect the rotor shaft surface from scratches. The rotor shaft 3 intersects the central axis of the rotor shaft mounting hole 2 at a 90-degree angle, forming a perpendicular relationship. Each end of the rotor shaft 3 has a bearing housing, which is connected to the mounting bracket 4 by bolts. Each bearing housing has four M12 bolt holes, and high-strength bolts are used to ensure a secure connection.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A turning and uprighting trolley for a large generator rotor shaft, characterized in that, The device includes a track frame with a movable track. A first movable disk and a second movable disk are mounted on the movable track. A fixed frame is mounted on the first movable disk, and a rotor shaft fixing assembly is rotatably mounted on the fixed frame. The rotor shaft fixing assembly has a rotor shaft mounting hole. A fixing clip is mounted on the second movable disk, and the fixing clip has a slot that mates with the rotor shaft fixing assembly. The rotor shaft fixing assembly is locked and fixed in the slot as the first movable disk moves.

2. The turning and uprighting trolley for a large generator rotor shaft according to claim 1, characterized in that, The rotor shaft fixing assembly is connected to the fixing frame via a rotating shaft. The rotor shaft mounting hole is vertically set, and the axial direction of the rotating shaft intersects the central axis of the rotor shaft mounting hole.

3. The turning and uprighting trolley for a large generator rotor shaft according to claim 1, characterized in that, The fixing clip is equipped with a mounting plate, which has threaded holes. The fixing bracket also has threaded holes, and the threaded holes on the mounting plate and the fixing bracket are arranged opposite to each other.

4. The turning and uprighting trolley for a large generator rotor shaft according to claim 1, characterized in that, A push rod is installed on one side of the fixing clip. The extension direction of the push rod is parallel to the extension direction of the moving track, and the length of the push rod is greater than the length of the moving track.

5. The turning and uprighting trolley for a large generator rotor shaft according to claim 1, characterized in that, The rotor shaft fixing assembly includes a protrusion, the vertical cross-section of which is rectangular, and the vertical cross-section of the slot is rectangular.

6. The turning and straightening trolley for a large generator rotor shaft according to claim 1, characterized in that, A lifting frame is installed at the lower part of the track frame, which is used to raise the height of the track frame.

7. The turning and straightening trolley for a large generator rotor shaft according to claim 6, characterized in that, The lifting frame is a hydraulic lifting frame.

8. The turning and straightening trolley for a large generator rotor shaft according to claim 6, characterized in that, The lower part of the raised frame is equipped with a movable frame, and the lower part of the movable frame is rotatably equipped with rollers.

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