Turning-over vertical trolley for rotor shaft of large generator

Abstract

The invention relates to a turning-over vertical trolley for a rotor shaft of a large generator, which comprises a track frame, a moving track is arranged on the track frame, a first moving disc and a second moving disc are mounted on the moving track in a matched manner, a fixing frame is mounted on the first moving disc, a rotor shaft fixing assembly is rotatably mounted on the fixing frame, and a rotating shaft is mounted on the rotor shaft fixing assembly. A rotor shaft installation hole is formed in the rotor shaft fixing assembly, a fixing clamping piece is installed on the second movable disc, a clamping groove matched with the rotor shaft fixing assembly is formed in the fixing clamping piece, and the rotor shaft fixing assembly is fixed in the clamping groove along with the movable clamping piece of the first movable disc. Convenient turning-over operation and vertical placement of the large generator rotor shaft are integrally achieved, and using is convenient, fast and safe.

Description

Technical Field

[0001] The invention relates to a turning and uprighting trolley for a large generator rotor shaft. Background Art

[0002] The rotor shaft of a large generator is a core component, and its installation, removal, handling, and repair are crucial steps in generator maintenance. Due to its large size and weight, turning and uprighting the rotor shaft presents numerous difficulties and safety risks.

[0003] Currently, the handling and operation of large generator rotor shafts typically involves overhead crane hoisting and pulley movement. For example, Chinese patent CN203352392U discloses a generator rotor assembly and disassembly device comprising a transport trolley and its drive device. The trolley's upper surface supports a separately heated turbine generator rotor retaining ring, and its working surface is provided with a linear motion track along the axial direction of the turbine generator rotor. Driven by the drive device, the trolley moves along this linear motion track. This device is primarily used for mounting and disassembling the retaining ring, but has limited support for rotating and straightening the rotor shaft.

[0004] The main problems with the existing technology are: the rotor shaft is currently turned over on a wooden board with the help of a crane. During the turning process, due to the heavy weight of the rotor shaft, it is difficult for the operator to control its rotation angle and speed. In addition, the shaft has no support during turning, so it will shake left and right, which poses a safety hazard. There is currently a lack of an integrated device that can achieve both turning and uprighting functions, which leads to safety risks for workers during operation and increases the difficulty and time cost of operation.

[0005] Therefore, there is an urgent need for a large generator rotor shaft turning and uprighting trolley with a simple structure, easy operation and integrated functions. Summary of the Invention

[0006] The purpose of the present invention is to solve the above deficiencies in the prior art and provide a turning and uprighting trolley for a large generator rotor shaft, which integrates the convenient turning operation and upright placement of the large generator rotor shaft. The purpose of the present invention is:

[0007] The present invention proposes a turning and uprighting trolley for the rotor shaft of a large generator, comprising a track frame, a movable track being provided on the track frame, a first movable disk and a second movable disk being cooperatively mounted on the movable track, a fixed frame being mounted on the first movable disk, a rotor shaft fixing assembly being rotatably mounted on the fixed frame, a rotor shaft fixing assembly being provided with a rotor shaft mounting hole, a fixing clamp being mounted on the second movable disk, a fixing clamp being provided with a slot cooperating with the rotor shaft fixing assembly, and the rotor shaft fixing assembly being fixed in the slot by being clamped 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 rotating shaft axially intersects with the central axis of the rotor shaft mounting hole.

[0009] Furthermore, a mounting plate is mounted on the fixing fixture, a threaded hole is formed on the mounting plate, a threaded hole is formed on the fixing frame, and the threaded hole on the mounting plate is arranged opposite to the threaded hole on the fixing frame.

[0010] Furthermore, a push rod is installed on one side of the fixed clamp, 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 the protrusion 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, and the lifting frame is used to increase 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 lifting frame, and a roller is rotatably installed at the lower part of the movable frame.

[0015] Compared with the prior art, the present invention has the following advantages: the rotor shaft fixing assembly is rotatably connected to the fixing frame via the rotating shaft, so that the rotor shaft can be reversed, thereby avoiding the risk caused by the movement of the lower part during the flipping process;

[0016] The height of the track frame can be adjusted by the lifting frame to meet the needs of different working environments. The mobile frame equipped with rollers improves the mobility of the entire device, allowing the entire device to be flexibly moved in the workplace, greatly improving the operational convenience and safety of the turning over and uprighting process of the large generator rotor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram from the front view of a trolley for turning over and standing up the rotor shaft of a large generator;

[0019] Figure 3 It is a schematic diagram from the side view of a trolley for turning over and standing up the rotor shaft of a large generator;

[0020] Figure 4 This is a three-dimensional structural diagram of a track frame for a trolley that turns over and stands upright on the rotor shaft of a large generator;

[0021] In the figure: 1. Rotor shaft fixing assembly, 2. Rotor shaft mounting hole, 3. Rotating shaft, 4. Fixed frame, 5. Track frame, 6. Elevating frame, 7. Roller, 8. Moving frame, 9. Push rod, 10. Second moving disk, 11. Mounting plate, 12. Fixed clamp, 13. Slot, 14. First moving disk, 15. Protrusion, 16. Moving track. DETAILED DESCRIPTION

[0022] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0023] Example 1

[0024] Please see Figure 1-4An embodiment of the present invention provides a turning and uprighting trolley for a large generator rotor shaft, comprising a track frame 5, on which a movable track 16 is provided, on which a first movable disk 14 and a second movable disk 10 are mounted, a fixing frame 4 is mounted on the first movable disk 14, a rotor shaft fixing assembly 1 is rotatably mounted on the fixing frame 4, a rotor shaft fixing assembly 1 is provided with a rotor shaft mounting hole 2, a fixing clamp 12 is mounted on the second movable disk 10, and a fixing clamp 12 is provided with a slot 13 that cooperates with the rotor shaft fixing assembly 1, and the rotor shaft fixing assembly 1 is 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 a large generator rotor shaft. The track frame 5 has a length of 3000 mm, a width of 800 mm, and a height of 500 mm. The movable rails 16 on the track frame 5 consist 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 movable trays. Both the first movable tray 14 and the second movable tray 10 are disc-shaped, 200 mm in diameter and 30 mm thick, constructed from high-strength alloy steel. Two sliders are located at the bottom of each of the first and second movable trays 14 and 10, each mates with the U-shaped grooves. These 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 movable trays on the rails. The fixed frame 4 mounted on the first movable tray 14 is L-shaped, with a vertical portion 600 mm high and a horizontal portion 400 mm long, both 20 mm thick. The fixed frame 4 is made of high-strength steel with a rust-resistant surface treatment. The vertical portion of the fixed frame 4 is welded to the first movable tray 14, ensuring a secure connection. The rotor shaft mounting assembly 1 is connected to the mounting bracket 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 mounting assembly 1, while the other end is connected to the horizontal portion of the mounting bracket 4 via a bearing, enabling the rotor shaft mounting assembly 1 to rotate about the rotating shaft 3. The rotor shaft mounting hole 2 is vertically arranged with a diameter of 300 mm and a depth of 400 mm, capable of accommodating the rotor shaft of a large generator. The rotating shaft 3 axially intersects the central axis of the rotor shaft mounting hole 2 at a 90-degree angle, forming a perpendicular relationship. The rotor shaft mounting assembly 1 is cylindrical, with a diameter of 400 mm and a height of 500 mm, and is made of high-strength alloy steel. A protrusion 15 is provided on the side of the rotor shaft mounting assembly 1. The protrusion 15 has a rectangular vertical cross-section and measures 150 mm in length, 80 mm in width, and 100 mm in height. The smooth surface of the protrusion 15 facilitates mating with the slot 13. The fixing member 12 installed on the second movable plate 10 is a square structure with a length of 300 mm, a width of 200 mm and a height of 150 mm.The vertical cross-section of the slot 13 on the fixing clamp 12 is rectangular, with a length of 152 mm, a width of 82 mm, and a depth of 102 mm. This is slightly larger than the size of the protrusion 15, ensuring that the protrusion 15 can be smoothly inserted into the slot 13 and remain stable. The fixing clamp 12 is firmly connected to the second movable disk 10 via bolts. A mounting plate 11 is mounted on the fixing clamp 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 a threaded hole with a diameter of 12 mm and a thread specification of M12. The fixing frame 4 also has a threaded hole with the same diameter and specifications as the mounting plate 11. The threaded hole on the mounting plate 11 is arranged opposite the threaded hole on the fixing frame 4. Once 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 frame 4 via bolts, further enhancing the stability of the connection. A push rod 9 is installed on one side of the fixed clamp 12. The push rod 9 is a cylindrical structure 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 movable track 16. The length of the push rod 9 is greater than the length of the movable track 16, which facilitates the operator to push the second movable disk 10 outside the track. One end of the push rod 9 is welded to the fixed clamp 12, and the other end is provided with a rubber handle for easy grip. The lower part of the track frame 5 is installed with a lifting frame 6. The lifting frame 6 is a hydraulic lifting frame 6 that can increase 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. Mounted beneath the elevated frame 6 is a mobile frame 8, a rectangular frame structure measuring 3200 mm in length, 1000 mm in width, and 150 mm in height. Eight rollers 7, each 150 mm in diameter, are rotatably mounted beneath the frame 8. These rollers are evenly distributed around the frame 8. Made of high-strength nylon, they offer excellent load-bearing capacity and wear resistance. Connected to the frame 8 via bearings, they can rotate 360 degrees, facilitating the movement and steering of the trolley.

[0025] The working principle of the turning and uprighting trolley for the rotor shaft of a large generator in this embodiment is as follows: first, the rotor shaft fixing assembly 1 is rotated to keep the axis of the rotor shaft mounting hole 2 horizontal, the trolley is moved to the vicinity of the horizontally placed rotor shaft, and the height of the hydraulic lifting frame 6 is adjusted to align the rotor shaft mounting hole 2 with the rotor shaft; then, the rotor shaft is placed into the rotor shaft mounting hole 2 and fixed; then, the rotor shaft is placed into and fixed in the rotor shaft mounting hole 2, the rotor shaft fixing assembly 1 is rotated to place the rotor shaft vertically, and the first movable plate 14 is pushed to move along the movable track 16 so that the protrusion 15 of the rotor shaft fixing assembly 1 is aligned with the slot 13 on the fixing clamp 12, and then the protrusion 15 is inserted into the slot 13, and the mounting plate 11 is connected to the fixing frame 4 by bolts to form a stable connection; finally, the trolley is moved to complete the transportation or installation task.

[0026] Example 2

[0027] Based on Example 1, the rotor shaft fixing assembly 1 in this embodiment is connected to the fixing frame 4 via a rotating shaft 3. The rotor shaft mounting hole 2 is vertically arranged, and the rotating shaft 3 axially intersects the central axis of the rotor shaft mounting hole 2. The rotating shaft 3 has a diameter of 60 mm and a length of 180 mm, and is made of high-carbon steel. A key connection is used between the rotating shaft 3 and the rotor shaft fixing assembly 1. The key has dimensions of 16 × 10 × 50 mm to ensure a 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] 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. Rotating shaft 3 axially intersects the central axis of rotor shaft mounting hole 2 at a 90-degree angle, forming a perpendicular relationship. Rotating shaft 3 is fitted with a bearing seat at each end, connected to mounting bracket 4 via bolts. Each bearing seat has four M12 bolt holes, using high-strength bolts to ensure a secure connection.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A turning and uprighting trolley for a large generator rotor shaft, characterized in that: The invention comprises a track frame, wherein the track frame is provided with a movable track, and a first movable disk and a second movable disk are mounted on the movable track in cooperation, the first movable disk is provided with a fixed frame, a rotor shaft fixing assembly is rotatably mounted on the fixed frame, the rotor shaft fixing assembly is provided with a rotor shaft mounting hole, a fixing clamp is installed on the second movable disk, the fixing clamp is provided with a slot that cooperates with the rotor shaft fixing assembly, and the rotor shaft fixing assembly is fixed in the slot by being engaged with the movement of the first movable disk.

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 arranged, and the rotating shaft axially intersects with 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: A mounting plate is mounted on the fixing clamp, a threaded hole is provided on the mounting plate, a threaded hole is provided on the fixing frame, and the threaded hole on the mounting plate is arranged opposite to the threaded hole on the fixing frame.

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 fixed clamp, 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 the protrusion is rectangular, and the vertical cross-section of the slot is rectangular.

6. The turning and uprighting 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, and the lifting frame is used to increase the height of the track frame.

7. The turning and uprighting 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 uprighting trolley for a large generator rotor shaft according to claim 6, characterized in that: A moving frame is installed at the lower part of the lifting frame, and a roller is rotatably installed at the lower part of the moving frame.

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