CN111908322A - Main shaft hoisting belt and hoisting method of bulb tubular hydro-generator - Google Patents

Abstract

The invention discloses a main shaft hoisting belt and a hoisting method of a bulb tubular hydro-generator. One end of the hoisting belt is provided with a hanging part and the other end is provided with a connecting part, the hanging part is used to hang on the main hook of the bridge machine, the connecting part is connected with a shackle, and the shackle is connected with the hoisting belt after the connecting part surrounds the main shaft. The hoisting method of the present invention uses two hoisting belts to replace the original wire rope. During the operation of removing and hanging the hoisting belt, the operator does not need to stand above the main shaft to perform the aerial work of disassembling and assembling the rope head, and can directly stand on the two sides of the main shaft. The two slings are locked on the side, which is convenient and labor-saving, and avoids the risk of falling for high-altitude workers.

Description

Main shaft hoisting belt and hoisting method of bulb tubular hydro-generator

technical field

The invention relates to a main shaft hoisting belt and a hoisting method of a bulb tubular hydro-generator.

Background technique

When repairing the hydro-generator set A, the main shaft needs to be hoisted out of the machine pit. After the main shaft of the unit is pulled horizontally to the special support pier, an electric hoist is used to pull up one end of the wire rope from the bottom of the main shaft, and then the hand hoist is used to assist the hanging. For the hook of the bridge machine, the whole operation process requires the operator to climb on the main shaft or the combined bearing to complete at high altitude, and the wire rope for hoisting the stator itself is heavy, the bending torque is large, it is difficult to control the wire rope, the operation is difficult and risky, and the hanging process is time-consuming and laborious ; And the wire rope is prone to sliding and shifting of the wire rope and the displacement of the force point when the wire rope is adjusted after it is hung and installed. Therefore, in order to prevent the wire rope from sliding and shifting during the lifting process, it is necessary to use a hand hoist in the upstream and downstream directions. The wire rope is fixed, the process is very cumbersome.

SUMMARY OF THE INVENTION

The purpose of the present invention is to aim at the above-mentioned defects in the prior art, to provide a bulb tubular hydro-generator main shaft hoisting belt and a hoisting method, which are used to solve the problem of needing to climb up the main shaft or the combined bearing during operation, and it is easy to use a steel wire rope in a point-like manner. There are problems of wire rope displacement and force point offset.

In order to realize the above-mentioned purpose of the invention, the present invention has adopted the following technical solutions:

A bulb tubular water turbine generator main shaft hoisting belt, one end of the hoisting belt is provided with a hanging part, the other end is provided with a connecting part, the hanging part is used for hanging on the main hook of a bridge machine, and the connecting part is connected with a shackle, The shackle is connected with the sling after the connecting part surrounds the main shaft.

As a further improvement of the above technical solution:

The suspension part and the lower half of the hoisting belt are provided with wear-resistant sleeves, and both ends of the wear-resistant sleeves are respectively provided with wear-resistant sleeves fixed on the suspension part and the hoisting belt. connect.

The sling is made of fibers.

A soft cladding layer is provided outside the shackle.

The lower end of the connecting portion of the sling is provided with a connecting hole, and the shackle is connected to the sling through the connecting hole.

On the other hand, the present invention also provides a method for hoisting the main shaft of a bulb tubular hydro-generator, the hoisting method comprising the following steps: 1) preparing a hoisting device, the hoisting device comprising two hoisting belts and two chain hoists , One end of the hoisting belt is provided with a hanging part, and the other end is provided with a connecting part; 2) Hang the hanging parts of the two hoisting belts on the hooks on the left and right sides of the main hook of the bridge machine, when the main shaft is horizontally pulled out to the special support pier Then, wind the connecting part of the sling on the left side of the main hook from the lower left side of the main shaft to the upper right side, and then connect the shackle to the sling, so that the sling sleeve is locked at the stress point of the main shaft, and then put the right side of the main hook. 3) Adjust the main hook so that the main hook is aligned with the center of gravity of the main shaft; 4) Connect the two chain hoists to the special lifting ring at the generator end of the main shaft, Adjust and make the two hoisting belts and the two chain hoists evenly stressed; 5) Lift the main shaft away from the special support pier, and adjust the position to lift it out of the machine pit.

Further, the position of the force bearing point in the step 2) is 650mm-750mm away from the combined bearing side.

Further, in the step 4), in the process of making the two hoisting belts and the two chain hoists evenly stressed, the force conversion adjustment of the two chain hoists is utilized, so that most of the weight of the main shaft is carried by the main hook of the bridge machine. .

Compared with the prior art, the advantages of the present invention are:

The sling of the present invention is provided with a hanging part at one end and a connecting part at the other end; The hoisting method uses two hoisting belts instead of one steel wire rope. During the dismantling and hanging operation of the hoisting belt, the operator does not need to stand above the main shaft to perform high-altitude operations such as disassembling and assembling the rope head. The operator can directly stand on both sides of the main shaft and easily It is convenient and labor-saving to complete the locking work of two hoisting belts, and avoids the risk of falling for high-altitude workers, and at the same time saves the process of using the bridge motor electric hoist to assist in removing the hanging rope head; The sling is not prone to slippage and deflection of the force point.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings required in the description of the embodiments or related technologies. Obviously, the drawings in the following description only relate to some implementations of the present invention. example, and not limitation of the present invention.

FIG. 1 is a schematic diagram of a prior art spindle hoisting.

FIG. 2 is a schematic view of the structure of the hoisting belt of the present invention.

3 is a cross-sectional view of the shackle of the present invention.

FIG. 4 is a schematic diagram of the main shaft hoisting of the present invention.

Labels in the figure: 1. Lifting belt; 2. Chain hoist; 3. Connecting part; 4. Suspension part; 5. Shackle; 6. Soft cladding; 7. Wear-resistant sleeve; 8. Main hook; 9. Main shaft; 10. Combined bearing; 11. Steel wire rope.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present invention, the technical solutions of the present invention are further described in non-limiting detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 2 , the main shaft hoisting belt 1 of the bulb tubular hydro-generator of this embodiment is provided with a hanging part 1 at one end and a connecting part 3 on the other end. The hanging part 4 and the connecting part 3 are integrally formed with the hoisting belt 1 , are made of fiber material, the specification is 50t×10m, the sling has better anti-slip effect than the wire rope, and the sling 1 is not easy to slide and shift after connecting with the main shaft 9. The hanging part 4 is in the form of a hanging ring, which is used for hanging on the main hook of the bridge machine. The lower end of the connecting portion 3 is provided with a connecting hole, and the shackle 5 is connected to the connecting portion 3 through the connecting hole. The shackle 5 is connected to the sling 1 after the connecting portion 3 surrounds the main shaft 9 . As shown in FIG. 3 , a soft cladding 6 is provided outside the shackle 5 , which can prevent the shackle 5 from causing extrusion deformation to the main shaft during the hoisting process. A wear-resistant sleeve 7 is provided at the middle and lower parts of the suspension part 4 and the hoisting belt 1 , and both ends of the wear-resistant sleeve 7 are respectively fixed on the hanging part 4 and the hoisting belt 1 . Wear sleeve 7 connection. The wear-resistant sleeve improves the wear resistance of the suspension portion 4 and the sling 1 and prolongs the service life of the sling 1 .

As shown in FIG. 4 , the method for hoisting the main shaft of a bulb tubular hydro-generator in this embodiment includes the following steps:

1) Prepare a hoisting device, the hoisting device includes two hoisting belts 1 and two 30t chain hoists 2, one end of the hoisting belt 1 is provided with a hanging part 4, and the other end is connected with a connecting part 3;

2) Hang the suspension parts 4 of the two slings 1 on the hooks on the left and right sides of the main hook 8 of the bridge machine. The connecting part 3 is wound from the lower left side of the main shaft 9 to the upper right side, and then the shackle 5 is connected to the sling 1, so that the sling 1 is locked at the stress point position of the main shaft 9, and then the sling on the right side of the main hook 8 is locked. 1. In the same way, lock it on the force point position of the main shaft 9; the force point position is 650mm-750mm away from the combined bearing 10 side.

3) Adjust the main hook 8 so that the main hook 8 is aligned with the center of gravity of the main shaft;

4) Connect the two chain hoists 2 with the special lifting ring at the main generator end, adjust and make the two lifting belts 1 and the two chain hoists 2 evenly stressed, and at the same time use the force conversion adjustment of the two chain hoists to make the Most of the weight of the main shaft is carried by the main hook of the bridge machine;

5) Lift the main shaft 9 away from the special support pier, adjust the position and lift it out of the machine pit.

In the present invention, two slings are used to replace the original steel wire rope, and the two slings respectively bypass the main shaft from both sides of the main shaft where the main shaft is stressed, and connect the shackle to the sling. During the operation of disassembling and hanging the sling, The operator does not need to stand above the main shaft to perform aerial work of disassembling and assembling the rope head. The operator can directly stand on both sides of the main shaft to complete the work of locking the two slings, which is convenient and labor-saving, and avoids the risk of falling for aerial workers. The hoisting belt itself is non-slip, eliminating the need to install chain hoists in the upstream and downstream directions of the main shaft to fix the process, reducing the operation time and improving the operation efficiency.

It should be pointed out that the above-mentioned preferred embodiment is only to illustrate the technical concept and characteristics of the present invention, and its purpose is to enable those who are familiar with the technology to understand the content of the present invention and implement it accordingly, and cannot limit the present invention. protected range. All equivalent changes or modifications made according to the spirit of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. The bulb through-flow type hydraulic generator spindle hoisting belt is characterized in that one end of the hoisting belt (1) is provided with a hanging part (4), the other end of the hoisting belt is provided with a connecting part (3), the hanging part (4) is used for hanging on a bridge crane main hook, the connecting part (3) is connected with a shackle (5), and the shackle (5) is connected with the hoisting belt (1) after the connecting part (3) surrounds a spindle (9).

2. The bulb through-flow type hydraulic generator main shaft hoisting belt according to claim 1, characterized in that wear-resistant sleeves (7) are arranged at the middle lower parts of the hanging part (4) and the hoisting belt (1), two ends of each wear-resistant sleeve (7) are respectively fixed on the hanging part (4) and the hoisting belt (1), and the shackle (5) is connected with the wear-resistant sleeves (7) on the hoisting belt (1) when the hoisting belt (1) hoists the main shaft (9).

3. The main shaft hoisting belt of the bulb through-flow type hydraulic generator according to claim 1, wherein the hoisting belt (1) is made of a fiber material.

4. The main shaft hoisting belt of a bulb through-flow type hydraulic generator according to claim 1, wherein a soft coating (6) is arranged outside the shackle (5).

5. The bulb through-flow type hydraulic generator spindle hoisting belt according to claim 1, wherein a connecting hole is formed in the lower end of the connecting portion (3) of the hoisting belt (1), and the shackle (5) penetrates through the connecting hole to be connected with the hoisting belt (1).

6. The method for hoisting the main shaft of the bulb tubular hydraulic generator is characterized by comprising the following steps of:

1) preparing a hoisting device, wherein the hoisting device comprises two hoisting belts and two chain blocks, one end of each hoisting belt is provided with a suspension part, and the other end of each hoisting belt is provided with a connecting part;

2) hanging the hanging parts of the two hoisting belts on the hooks on the left side and the right side of the main hook of the bridge crane respectively, after the main shaft is horizontally pulled out to a special buttress, winding the hoisting belt connecting part on the left side of the main hook from the left lower side to the right upper side of the main shaft, connecting the shackle with the hoisting belts, enabling the hoisting belts to be locked at the stress point position of the main shaft in a sleeved mode, and then locking the hoisting belts on the right side of the main hook at the stress point position of the main shaft in a sleeved mode in the same mode;

3) adjusting the main hook to align the main hook to the gravity center position of the main shaft;

4) connecting the two chain blocks with a special lifting ring at the end of the main shaft generator, and adjusting and enabling the two lifting belts and the two chain blocks to be stressed uniformly;

5) the main shaft is lifted away from the special buttress, and the position is adjusted to be lifted out of the pit.

7. Hoisting method according to claim 6, characterized in that the location of the force point in step 2) is 650-750 mm from the combined bearing side.

8. The hoisting method according to claim 6, wherein in the step 4), in the process of uniformly stressing the two hoisting belts and the two chain blocks, the two chain blocks are utilized for stress conversion and adjustment, so that most of the weight of the main shaft is borne by the main hook of the bridge crane.

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