Hoisting device for steam turbine overhaul
By adjusting the movable sleeve and counterweight ring using components such as the lifting plate and servo motor, the problem of unstable turbine rotor hoisting was solved, achieving stable hoisting and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-03-20
AI Technical Summary
In the existing process of hoisting steam turbine rotors, the center of gravity is not in the middle, which leads to uneven tension in the hoisting ropes. This may cause excessive tension on one side, resulting in breakage, unstable hoisting, and potential safety hazards.
The system employs components such as a lifting plate, servo motor, drive screw, and counterweight ring. The servo motor adjusts the rotation of the drive screw, thereby adjusting the position of the movable sleeve, and in conjunction with adjusting the position of the counterweight ring, balances the lifting stability.
This method enables the stable hoisting of the turbine rotor, reduces safety hazards during the hoisting process, and improves the stability and safety of the hoisting.
Smart Images
Figure CN224015185U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hoist device technical field, concretely is a steam turbine overhauls hoist device. BACKGROUND
[0002] In the steam turbine manufacturing process, the steam turbine rotor needs to be lifted according to the processing and assembly requirements. The steam turbine rotor is a large workpiece, and special lifting tools must be used to ensure the safety of the workpiece and the person.
[0003] But it still has the following disadvantages in practical use: the existing steam turbine rotor is usually kept in a horizontal state during hoisting, and since the center of gravity of the steam turbine rotor is not in the middle position, the pulling forces of the two hoisting ropes are inconsistent, which may cause the pulling force of one hoisting rope to be too large and the pulling force of the other hoisting rope to be too small during use, and the hoisting rotor may shake and collide, causing damage to the rotor.
[0004] Therefore, the technical scheme provides a steam turbine overhauls hoist device to better solve the above problems. INVENTION CONTENTS
[0005] The technical scheme adopted by the utility model is as follows: a steam turbine overhauls hoist device, comprising a hoisting plate, two sides of the top of the hoisting plate are fixed with fixing pieces, and the inner side of the fixing piece is rotatably installed with a lifting rope;
[0006] Both sides of the top of the hoisting plate are fixed with fixed plates, and a threaded rod is fixed between a group of fixed plates, and the threaded rod is threadedly connected with a counterweight ring;
[0007] The inside of the limit sliding groove is rotatably installed with a drive screw rod, and the left and right sides of the hoisting plate are provided with a servo motor, and the output end of the servo motor is connected with the drive screw rod, the inside of the limit sliding groove is inserted with a limit sliding block, and the limit sliding block is threadedly connected with the drive screw rod, both sides of the hoisting plate are movably sleeved with a movable sleeve, and the movable sleeve is fixedly connected with the limit sliding block, and the movable sleeve is installed with a lifting rope for hoisting the steam turbine rotor through a lifting rope stable joint at the middle position.
[0008] In a preferred embodiment, the fixing piece is a U-shaped structure, and the inner side of the fixing piece is rotatably installed with a connecting shaft rod, and the lifting rope is fixedly connected with the connecting shaft rod.
[0009] In a preferred embodiment, the connecting part of the counterweight ring and the threaded rod is provided with a threaded structure matched with the threaded rod, and the counterweight ring is not less than six.
[0010] In a preferred embodiment, the limiting sliding block is matched with the limiting sliding groove, and the limiting sliding block and the movable sleeve can be welded or fixed by bolts.
[0011] In a preferred embodiment, the limiting sliding block is matched with the limiting sliding groove, and the limiting sliding block and the movable sleeve can be welded or fixed by bolts.
[0012] In a preferred embodiment, the lifting rope, away from the end of the lifting rope stable joint, can be matched with the clamp of the steam turbine to perform the lifting operation on the steam turbine rotor.
[0013] In a preferred embodiment, the side surface of the lifting plate is provided with a scale line, and the side surface of the movable sleeve is provided with an observation window which can be used for observing the scale line.
[0014] Therefore, the steam turbine rotor can be stably lifted, and the stability of the steam turbine rotor during lifting can be better ensured, and safety hazards are less likely to occur.
[0015] 1. In the utility model, the lifting rope is connected to the lifting equipment, and then the lifting rope is matched with the clamp of the steam turbine rotor to perform the lifting operation on the steam turbine rotor.
[0016] 2. In the utility model, first, the end of the steam turbine rotor which is relatively heavy is observed, then the driving lead screw is rotated by the servo motor, the movable sleeve on both sides of the lifting plate is driven by the driving lead screw to move, the movable sleeve connected to the heaviest end of the lifted steam turbine rotor and the lifting rope are adjusted to be farther than the movable sleeve and the lifting rope on the other side, then the steam turbine rotor is lifted, the lifting condition of the steam turbine rotor is observed, if the steam turbine rotor is still inclined during lifting, the distance between the movable sleeves on both sides is adjusted, and the position of the counterweight ring on the adjusting screw rod is adjusted at the same time, so that the counterweight on one side is increased to balance the lifting stability of the steam turbine rotor. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a structural schematic view of the utility model;
[0018] Figure 2 It is a lifting plate bottom view of the utility model;
[0019] Figure 3 It is a lifting plate bottom view of the utility model; Figure 1 It is an enlarged schematic view of the structure of area A in the utility model.
[0020] Marked in the figure: 1 - hoisting plate; 2 - fixing piece; 3 - connecting shaft rod; 4 - hoisting rope; 5 - fixed plate; 6 - threaded rod; 7 - counterweight ring; 8 - limit sliding groove; 9 - driving screw; 10 - servo motor; 11 - limit sliding block; 12 - movable sleeve; 13 - hoisting rope stabilizing joint; 14 - hoisting rope; 15 - scale line; 16 - observation window. DETAILED DESCRIPTION
[0021] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with Figures 1-3 A steam turbine overhauling hoisting device is described in detail.
[0023] Referring to Figure 1 As shown in the figure, a steam turbine overhauling hoisting device comprises a hoisting plate 1, the top of the hoisting plate 1 is fixed with fixing pieces 2 on both sides, and the inner side of the fixing pieces 2 is rotatably installed with hoisting ropes 4, the fixing pieces 2 are U-shaped structures, and the inner side of the fixing pieces 2 is rotatably installed with connecting shaft rods 3, and the hoisting ropes 4 are fixedly connected with the connecting shaft rods 3.
[0024] According to the above technical scheme, the hoisting plate 1 can be hoisted by connecting the hoisting ropes 4 with hoisting equipment, and the hoisting ropes 4 are rotatably installed on the inner side of the fixing pieces 2 through the connecting shaft rods 3, which facilitates the rotational adjustment of the hoisting ropes 4, so that the angle of the hoisting ropes 4 is better when hoisting, and the hoisting ropes 4 can be protected.
[0025] Referring to Figure 1 As shown in the figure, the top of the hoisting plate 1 is fixed with fixed plates 5 on both sides, and a set of fixed plates 5 is fixed with threaded rods 6, the threaded rods 6 are threadedly connected with counterweight rings 7, the connection between the counterweight rings 7 and the threaded rods 6 is provided with a threaded structure matched with the threaded rods 6, and the counterweight rings 7 are not less than six.
[0026] According to the above technical scheme, the counterweight ratio on both sides of the hoisting plate 1 can be adjusted by moving the position of the counterweight rings 7 on the threaded rods 6, and the stability of the hoisting of the steam turbine rotor is increased.
[0027] Referring to Figures 1-3As shown, the lower two sides of the hoisting plate 1 are provided with a limiting sliding groove 8, and the inside of the limiting sliding groove 8 is rotatably provided with a drive screw 9. The left and right sides of the hoisting plate 1 are provided with a servo motor 10, and the output end of the servo motor 10 is connected with the drive screw 9. The inside of the limiting sliding groove 8 is inserted with a limiting sliding block 11, and the limiting sliding block 11 is threadedly connected with the drive screw 9. The limiting sliding block 11 is matched with the limiting sliding groove 8, and the limiting sliding block 11 and the movable sleeve 12 can be welded or fixed by bolts. The inside of the limiting sliding block 11 is provided with a threaded hole matched with the drive screw 9, and the drive screw 9 is threadedly connected in the threaded hole. The two sides of the hoisting plate 1 are movably provided with a movable sleeve 12, and the movable sleeve 12 is fixedly connected with the limiting sliding block 11. The movable sleeve 12 is provided with a hoisting rope 14 for hoisting the steam turbine rotor at the middle position through a hoisting rope stable joint 13. The end of the hoisting rope 14 away from the hoisting rope stable joint 13 can be matched with the clamp of the steam turbine to hoist the steam turbine rotor. The side of the hoisting plate 1 is provided with a scale line 15, and the side of the movable sleeve 12 is provided with an observation window 16 for observing the scale line 15.
[0028] According to the above technical scheme, first, observe which end of the steam turbine rotor is heavier, then drive the drive screw 9 to rotate through the servo motor 10, so that the drive screw 9 drives the movable sleeve 12 on both sides of the hoisting plate 1 to move in position, adjusts the movable sleeve 12 and the hoisting rope 14 connected with the heaviest end of the steam turbine rotor to be farther than the other movable sleeve 12 and the hoisting rope 14, then hoists the steam turbine rotor, and observes the hoisting of the steam turbine rotor. If the steam turbine rotor is still inclined when hoisted, adjust the distance between the two movable sleeves 12 at this time, and adjust the position of the counterweight ring 7 on the threaded rod 6 at the same time, that is, increase the counterweight on one side to balance the hoisting stability of the steam turbine rotor.
[0029] The application has the advantages of better stabilizing hoisting of the steam turbine rotor and better ensuring the stability of the steam turbine rotor during hoisting, and is not prone to safety hazards.
[0030] Working principle: Connect the hoisting rope 4 to the hoisting equipment, then cooperate the clamp matched with the steam turbine rotor with the hoisting rope 14 to hoist the steam turbine rotor.
[0031] First, observe which end of the steam turbine rotor is heavier, then drive the driving screw rod 9 through the servo motor 10 to rotate, so that the driving screw rod 9 drives the movable sleeve 12 on both sides of the lifting plate 1 to move the position, adjust the movable sleeve 12 and the lifting rope 14 connected with the heaviest end of the steam turbine rotor to be farther away from the other side of the movable sleeve 12 and the lifting rope 14, then lift the steam turbine rotor, and observe the lifting condition of the steam turbine rotor, if the steam turbine rotor is still tilted when lifting, then adjust the distance between the two movable sleeves 12 at this time, and adjust the position of the counterweight ring 7 on the adjusting screw rod 6, that is, increase the counterweight on one side to balance the lifting stability of the steam turbine rotor.
[0032] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the application patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the application patent should be subject to the appended claims.
Claims
1. A steam turbine maintenance hoisting device, comprising a hoisting plate (1), characterized in that: The top two sides of the hoisting plate (1) are fixed with fasteners (2), and the inner side of the fasteners (2) is rotatably installed with a hoisting rope (4); The top two sides of the hoisting plate (1) are fixed with fixing plates (5), and a threaded rod (6) is fixed between a group of fixing plates (5). A counterweight ring (7) is threaded onto the threaded rod (6). The lower sides of the lifting plate (1) are provided with limiting grooves (8), and a drive screw (9) is rotatably installed inside the limiting groove (8). The left and right sides of the lifting plate (1) are provided with servo motors (10), and the output end of the servo motors (10) is connected to the drive screw (9). The limiting groove (8) is inserted with a limiting slider (11), and the limiting slider (11) is threadedly connected to the drive screw (9). The two sides of the lifting plate (1) are movably fitted with movable sleeves (12), and the movable sleeves (12) are fixedly connected to the limiting sliders (11). The middle position of the movable sleeve (12) is fitted with a lifting rope (14) for lifting the turbine rotor through a lifting rope stabilizing joint (13).
2. The turbine overhaul hoisting device as described in claim 1, characterized in that: The fixing member (2) has a U-shaped structure, and a connecting shaft (3) is rotatably installed on the inner side of the fixing member (2). The lifting rope (4) is fixedly connected to the connecting shaft (3).
3. The turbine overhaul hoisting device as described in claim 1, characterized in that: The connection between the counterweight ring (7) and the threaded rod (6) is provided with a threaded structure that is adapted to the threaded rod (6), and there are no fewer than six counterweight rings (7).
4. The turbine overhaul hoisting device as described in claim 1, characterized in that: The limiting slider (11) is adapted to the limiting groove (8), and the limiting slider (11) and the movable sleeve (12) can be welded or fixed by bolts.
5. The turbine overhaul hoisting device as described in claim 1, characterized in that: The limiting slider (11) has a threaded hole inside that is adapted to the drive screw (9), and the drive screw (9) is threadedly connected in the threaded hole.
6. The turbine overhaul hoisting device as described in claim 1, characterized in that: The end of the hoisting rope (14) away from the hoisting rope stabilizing joint (13) can be used with a clamp adapted to the turbine to hoist the turbine rotor.
7. The turbine overhaul hoisting device as described in claim 1, characterized in that: The side of the hoisting plate (1) is provided with scale lines (15), and the side of the movable sleeve (12) is provided with an observation window (16) for observing the scale lines (15).