CN217578020U

CN217578020U - Lifting appliance for mounting rotor of hydraulic generator

Info

Publication number: CN217578020U
Application number: CN202221191434.0U
Authority: CN
Inventors: 刘景宝; 杨涛; 刘立宁; 田鹏; 李青怀; 吕军; 赵越; 王猛
Original assignee: Stecol Corp
Current assignee: Stecol Corp
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-10-14
Anticipated expiration: 2032-05-18

Abstract

The utility model relates to a lifting appliance for mounting a hydraulic generator rotor, which is a bilaterally symmetrical flat block-shaped structure, the upper end part of the lifting appliance is an arch-shaped bulge part, and a lifting hook hanging hole is arranged at the center of the arch-shaped bulge part; two vertical stop blocks are welded on the upper end surfaces of the left side and the right side outside the arched convex part respectively, a limiting rope groove is formed between the two vertical stop blocks, the groove width of the rope groove is larger than the diameter of a steel wire rope for hoisting, and the distance from the middle surface of the limiting rope groove at the two sides to the middle surface of a hanging hole of the lifting hook is consistent with the distance from the center of the rotor hoisting fixture to the end, close to the arm, of the overhanging wall; when the hydraulic generator rotor is lifted, the hook hanging holes and the bridge crane hook form hook-clamp fit, the limiting rope grooves on two sides are respectively matched with the upper ends of two steel wire ropes for lifting in an overlapping and embedding manner, and the lower ends of the two steel wire ropes are respectively matched with the two extending arm ring sleeves of the rotor lifting fixture, so that the two steel wire ropes are parallel to and away from the outer surface of the motor rotor. The lifting appliance improves the mounting precision and the lifting efficiency, and avoids friction scratch and extrusion to the motor rotor.

Description

Lifting appliance for mounting rotor of hydraulic generator

Technical Field

The utility model belongs to the technical field of hydraulic and hydroelectric engineering, a hydraulic generator is related to, in particular to hoist is used in hydraulic generator rotor installation.

Background

When the rotor of the hydraulic generator in the small hydropower station leaves a factory, a rotor hoisting fixture is generally fixed outside the rotor, and the rotor hoisting fixture is of a snap ring structure with two symmetrical extending arms, as shown in figure 2, and is used for being connected with a steel wire rope when the rotor is installed. The existing small hydropower station hydraulic generator rotor is generally hoisted by adopting a traditional lifting hook and a traditional steel wire rope in the hoisting process, so that the steel wire rope can cause large extrusion and friction on the surface of a rotor spindle in the hoisting process, the rotor spindle is deformed and damaged, and the installation quality requirement can not be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's weak point, providing one kind and improving installation accuracy, hoist and mount efficiency, hoist and mount security, and can avoid the hoist and mount in-process to the friction of rotor main shaft and the hydro-generator rotor installation hoist that the extrusion damaged.

The above object of the present invention is achieved by the following technical solutions:

the utility model provides a hoist is used in hydraulic generator rotor installation which characterized in that: the lifting appliance is of a bilaterally symmetrical flat block-shaped structure, the upper end part of the lifting appliance is an arched convex part, and a lifting hook hanging hole is formed in the center of the arched convex part; two vertical check blocks are respectively welded on the upper end surfaces of the left side and the right side outside the arch-shaped convex part, a limiting rope groove is formed between the two vertical check blocks, the groove width of the limiting rope groove is larger than the diameter of a steel wire rope for hoisting, and the distance from the middle surface of the limiting rope groove at the two sides to the middle surface of a hanging hole of the lifting hook is consistent with the distance from the center of the rotor hoisting fixture to the end, close to the arm, of the overhanging wall;

when the hydraulic generator rotor is lifted, the hook hanging holes and the bridge crane hook form hook-clamp fit, the limiting rope grooves on two sides respectively form overlapping and embedding fit with the upper ends of two steel wire ropes for lifting, and the lower ends of the two steel wire ropes are respectively matched with the two extending arm ring sleeves of the rotor lifting clamp, so that the two steel wire ropes are parallel to and away from the outer surface of the motor rotor.

Further: the upper part of the hanging hole of the lifting hook is in a shape of a convex semicircle, and the lower part of the hanging hole of the lifting hook is in a square shape.

And further: the upper end face of the vertical baffle is arc-shaped.

And further: the lifting appliance is formed by welding a front side plate, a rear side plate, a bottom plate, a left side plate, a right side plate, a top plate with a middle arch and four vertical baffle plates, and the inner part of the lifting appliance is of a cavity structure; the hanging holes of the lifting hook are arranged on the front side plate and the rear side plate in an aligned mode and matched with the arch of the top plate.

The utility model has the advantages of and positive effect:

1. the lifting appliance meets the requirements of the lifting strength and rigidity of the hydraulic generator rotor, simultaneously ensures that the lifting hook lifting center is consistent with the assembly gravity center of the main shaft, solves the problems that the shaft center is deviated and the installation precision is difficult to control after the rotor is lifted, and avoids the quality problems that the main shaft of the rotor is scraped, extruded and deformed by the friction of a lifting steel wire rope and the like.

2. The lifting appliance is simple to manufacture, the lifting efficiency and the mounting precision are greatly improved, the safety and quality accidents are avoided, and the construction cost is reduced. The lifting appliance obtains good effect through practice of 5 sets of 3 power stations, and can be popularized and used for similar set rotor lifting work.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a side view of the present invention;

fig. 3 is a perspective view of the present invention;

fig. 4 is a reference diagram of the usage state of the present invention.

Detailed Description

The structure of the present invention will be further explained by embodiments with reference to the drawings. It is to be understood that this embodiment is illustrative and not restrictive.

The invention discloses a lifting appliance for mounting a hydraulic generator rotor, which is shown in figures 1-4 and has the following invention points: the whole shape of the lifting appliance 1 is a bilateral symmetry flat block-shaped structure, the upper end part of the lifting appliance is an arch-shaped bulge part 1.2, and the lower end part of the lifting appliance is a rectangular block-shaped bulge part 1.4. A hook hanging hole 1.3 is arranged at the center of the arch-shaped convex part. Two vertical check blocks 1.1 are respectively welded on the upper end surfaces of the left side and the right side of the outer side of the arch-shaped protruding part, a limiting rope groove 1.5 is formed between the two vertical check blocks, the groove width of the limiting rope groove is larger than the diameter of the steel wire rope for hoisting, the steel wire rope for hoisting can be conveniently and smoothly hung, and the limiting effect can be realized on the upper end of the steel wire rope. The distance between the middle surface of the limiting rope grooves on the two sides and the middle surface of the hanging hole of the lifting hook is consistent with the distance from the center of the rotor hoisting fixture to the end, close to the arm, of the extending wall.

By adopting the lifting appliance, when the hydraulic generator rotor is lifted, the lifting hook hanging holes and the bridge crane lifting hooks 2 form hook-and-clamp fit, and the effect that the upper ends of the lifting hook hanging holes are connected with the bridge crane is achieved. The limiting rope grooves on the two sides are respectively in lap-joint fit with the upper ends of the two hoisting steel wire ropes 3, so that the upper ends of the steel wire ropes are surrounded in the limiting grooves. The lower ends of the two steel wire ropes are respectively matched with the two extending arm ring sleeves of the rotor hoisting fixture 5, so that the two steel wire ropes are parallel to and away from the outer surface of the motor rotor, and the hydraulic generator rotor 4 is hoisted through the two parallel steel wire ropes at equal intervals.

In the above structure: in order to realize that the bridge crane hook and the upper part of the hook hanging hole form large surface contact and ensure the stability of the lifting appliance, the upper part of the hook hanging hole is in the shape of an upward convex semicircle, and the lower part of the hook hanging hole is in the shape of a square.

In the above structure: the upper end face of the vertical baffle is arc-shaped, so that the steel wire rope is conveniently wound and sleeved into the limiting rope groove, and the steel wire rope and an operator are prevented from being injured by adopting a square scream structure.

In the above structure: through measurement, lofting, calculation, utilize 25mm thick steel sheet preparation to weld into the hoist, concrete structure is:

the lifting appliance is mainly formed by welding a front side plate, a rear side plate, a bottom plate, a left side plate, a right side plate, a top plate with a middle arch and four vertical baffle plates, and the lifting appliance is internally of a cavity structure. The hanging holes of the lifting hook are arranged on the front side plate and the rear side plate in an aligned mode and matched with the arch of the top plate. The steel plate welding structure is adopted to ensure the strength and rigidity of the lifting appliance, and meanwhile, the weight of the lifting appliance can be reduced to the greatest extent.

The manufacturing and using method of the hydro-generator rotor installation lifting appliance comprises the following steps:

(1) And determining the material and the thickness of the steel plate of the lifting appliance according to the total weight of the rotor of the hydraulic generator, so that the steel plate meets the requirements on lifting strength and rigidity.

(2) And determining the length of the lifting appliance and the clear distance between the steel wire rope limiting grooves according to the diameter size of the rotor spindle of the hydraulic generator and the size of the rotor lifting fixture.

(3) And determining the size of a hanging hole of the lifting appliance according to the shape and the size of a lifting hook of the installation lifting equipment (bridge crane).

(4) And determining the width of a single limit groove of the lifting appliance according to the diameter of the lifting steel wire rope.

(5) The two steel wire ropes are respectively hung in the two circular arc-shaped limiting grooves, so that the assembly center of gravity of the lifting center and the main shaft of the hydraulic generator rotor is ensured to be on the same line.

Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and drawings.

Claims

1. The utility model provides a hoist is used in hydraulic generator rotor installation which characterized in that: the lifting appliance is of a bilaterally symmetrical flat block-shaped structure, the upper end part of the lifting appliance is an arched convex part, and a lifting hook hanging hole is formed in the center of the arched convex part; two vertical check blocks are respectively welded on the upper end surfaces of the left side and the right side outside the arch-shaped convex part, a limiting rope groove is formed between the two vertical check blocks, the groove width of the limiting rope groove is larger than the diameter of a steel wire rope for hoisting, and the distance from the middle surface of the limiting rope groove at the two sides to the middle surface of a hanging hole of the lifting hook is consistent with the distance from the center of the rotor hoisting fixture to the end, close to the arm, of the overhanging wall;

2. The lifting tool for mounting the hydro-generator rotor according to claim 1, wherein: the upper part of the hanging hole of the lifting hook is in a shape of an upward convex semicircle, and the lower part of the hanging hole of the lifting hook is in a shape of a square.

3. The lifting appliance for mounting a hydro-generator rotor according to claim 1, wherein: the upper end face of the vertical baffle is arc-shaped.

4. The lifting appliance for mounting a hydro-generator rotor according to claim 1, wherein: the lifting appliance is mainly formed by welding a front side plate, a rear side plate, a bottom plate, a left side plate, a right side plate, a top plate with a middle arch and four vertical baffle plates, and the inner part of the lifting appliance is of a cavity structure; the hanging holes of the lifting hook are arranged on the front side plate and the rear side plate in an aligned mode and matched with the arch of the top plate.