CN113579696A

CN113579696A - Impact type runner dismounting method

Info

Publication number: CN113579696A
Application number: CN202110930410.6A
Authority: CN
Inventors: 唐杰天; 刘杰; 秦波; 杨厚果
Original assignee: Chongqing Water Turbine Works Co Ltd
Current assignee: Chongqing Water Turbine Works Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2021-11-02
Anticipated expiration: 2041-08-13
Also published as: CN113579696B

Abstract

The application relates to the technical field of water turbine equipment, and discloses a method for dismounting an impact runner, which comprises the following specific steps: the servomotor piston is connected with the main shaft, the servomotor cylinder body is connected with the rotating wheel, the servomotor cylinder body is lifted or lowered by introducing pressure oil through the servomotor, the rotating wheel is driven to move, the rotating wheel naturally slides to the lowest point or the rising top point along with the servomotor cylinder body, the rotating wheel is dismounted and mounted, and the impact type rotating wheel has the advantage of convenience in overhauling and maintenance.

Description

Impact type runner dismounting method

Technical Field

The invention relates to the technical field of water turbine equipment, in particular to a method for dismounting an impact runner.

Background

The rotating wheel of the water turbine is one of important parts of the water turbine generator set, bears the huge impact force of water flow, and is abraded and cavitated in the operation process, so that the rotating wheel needs to be periodically overhauled and maintained, and damaged parts need to be subjected to repair welding, polishing, flaw detection spraying and other treatments.

When the hydraulic turbine runner overhauls, usually through dismantling generator main shaft and hydraulic turbine main shaft, then wholly lift by crane and dismantle and overhaul the runner to the installation room, perhaps through dismantling generator guard shield, collecting ring etc. bridge crane hook passes main shaft centre bore and runner and links to each other and lift the runner, arrange in and overhaul the platform on, above-mentioned operation not only need demolish part unit part, still need make corresponding connection and supplementary lifting means, the operation is inconvenient, and take a lot of trouble and energy, the runner need be dismantled from the main shaft this moment, again with the runner repacking to the main shaft after the maintenance is qualified, dismantle and install the runner and all need use specialized tool, its step of dismantling and installing is loaded down with trivial details, be unfavorable for the maintenance and the maintenance to impulse type runner.

Disclosure of Invention

The invention aims to provide a method for dismounting an impact runner, which is convenient for overhauling and maintaining the impact runner.

In order to achieve the above object, the present invention adopts the following technical solutions.

A method for dismounting an impact runner is characterized by comprising the following specific steps:

step 1, connecting a servomotor piston with a main shaft, then connecting a servomotor with a lower cavity and oil pressure to lift a servomotor cylinder body to the top, and then connecting the servomotor cylinder body with a rotating wheel;

step 2, the rotating wheel is disconnected from the main shaft, the servomotor is decompressed, and the rotating wheel naturally slides to the lowest point along with the servomotor cylinder body;

step 3, connecting the rotating wheel with the main shaft;

step 4, the servomotor is detached from the rotating wheel, pressure oil is communicated with the servomotor, the cylinder body of the servomotor is lifted to penetrate through the rotating wheel and rise to the top, and the middle lower part of the cylinder body is connected with the rotating wheel;

step 5, disconnecting the rotating wheel from the main shaft;

step 6, the servomotor is decompressed, and the rotating wheel naturally slides to the lowest point along with the servomotor cylinder body;

and 7, after the bottom of the servomotor is connected with a travelling mechanism, the servomotor piston is disconnected with the main shaft, and the travelling mechanism pushes the servomotor and the rotating wheel out of the rotating wheel chamber together for maintenance.

Further, in step 1, the servomotor piston is in threaded connection with a flange shaft, the flange shaft is connected to the main shaft through a bolt, the top of the servomotor cylinder is connected with a sleeve through a bolt, the sleeve is connected with a plum blossom flange through a bolt, and the plum blossom flange is connected to the rotating wheel through a bolt.

In order to facilitate the connection of the rotating wheel and limit the position of the rotating wheel, and to protect the rotating wheel from falling off, in step 3, the rotating wheel is connected with the main shaft through a long screw rod, and the rotating wheel can slide on the long screw rod.

In order to facilitate connection, in step 4, the plum blossom-shaped flanges are arranged between the middle lower part of the cylinder body and the rotating wheel and are respectively connected with the plum blossom-shaped flanges through bolts.

Has the advantages that: according to the impact type runner dismounting method provided by the invention, the runner is dismounted from the lower part of the water turbine, a large number of machine set components are not required to be dismounted, the operation and the use are convenient, the trouble and the labor are saved, and the cost is saved compared with the traditional overhauling and maintaining mode.

Drawings

FIG. 1 is a schematic view of the structure of a wheel and a servomotor in embodiment 1;

FIG. 2 is a schematic structural view of the wheel and the servomotor in embodiment 1;

FIG. 3 is a schematic structural view of the wheel and the servomotor in embodiment 1;

FIG. 4 is a schematic structural view of the wheel and the servomotor in embodiment 1;

fig. 5 is a schematic structural view of the wheel and the servomotor in embodiment 1.

Reference numerals: 1. a servomotor piston; 2. a main shaft; 3. a servomotor; 4. a servomotor cylinder body; 5. a rotating wheel; 6. a traveling mechanism; 7. a flange shaft; 8. a sleeve; 9. a plum blossom flange; 10. a long screw.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the following embodiments are only used for understanding the principle of the present invention and the core idea thereof, and do not limit the scope of the present invention. It should be noted that modifications to the invention as described herein, which do not depart from the principles of the invention, are intended to be within the scope of the claims which follow.

Example 1

A method for dismounting an impact runner comprises the following steps:

step 1, as shown in fig. 1, a servomotor piston 1 is in threaded connection with a flange shaft 7, the flange shaft 7 is connected to a main shaft 2 through bolts, a servomotor 3 is provided with pressure oil to lift a servomotor cylinder 4, so that the servomotor cylinder 4 is lifted to the top and is connected with a rotating wheel 5, the top of the servomotor cylinder 4 is in bolted connection with a sleeve 8, the sleeve 8 is in bolted connection with a plum blossom flange 9, and the plum blossom flange 9 is connected to the rotating wheel 5 through bolts;

step 2, as shown in fig. 2, the rotating wheel 5 is detached from the main shaft 2, the servomotor 3 is decompressed, and the rotating wheel 5 naturally slides to the lowest point along with the servomotor cylinder 4;

step 3, the rotating wheel 5 is connected with the main shaft 2 through a long screw 10, and the rotating wheel 5 can slide on the long screw 10;

step 4, as shown in fig. 3, detaching the servomotor 3 from the rotating wheel 5, communicating pressure oil to the servomotor 3, lifting the servomotor cylinder 4 to penetrate through the rotating wheel 5 and lift to the top, and arranging a plum blossom flange 9 between the middle lower part of the cylinder and the rotating wheel 5 and respectively connecting the plum blossom flanges 9 through bolts;

step 5, the connection between the rotating wheel 5 and the main shaft 2 is released from the long screw 10;

step 6, as shown in fig. 4, the servomotor 3 releases pressure, and the rotating wheel 5 naturally slides to the lowest point along with the servomotor cylinder 4;

and 7, as shown in fig. 5, after the bottom of the servomotor 3 is connected with the traveling mechanism 6, the servomotor piston 1 is disconnected from the main shaft 2, and the traveling mechanism 6 pushes the servomotor 3 and the rotating wheel 5 out of the rotating wheel 5 chamber together for maintenance.

The method is required to be installed after the overhaul and maintenance are finished, and specifically comprises the following steps:

step 1, firstly, arranging a flange between a travelling mechanism 6 and a servomotor 3 outside a transportation channel door, connecting the flange with the flange through bolts respectively, then connecting a sleeve 8 with a bolt at the top of a servomotor cylinder 4, connecting the sleeve 8 with a plum blossom flange 9 through a bolt, connecting the plum blossom flange 9 with a rotating wheel 5 through a bolt, then pushing the travelling mechanism 6, and pushing the travelling mechanism and the servomotor to the position right below a main shaft 2 through an access channel door;

step 2, connecting the servomotor piston 1 with a flange shaft 7 in a threaded manner, wherein the flange shaft 7 is connected to the main shaft 2 through a bolt;

step 3, the connection between the bottom of the servomotor 3 and the traveling mechanism 6 is released, pressure oil is introduced into an oil inlet at the upper part of the servomotor 3, and the rotating wheel 5 is lifted until the long screw 10 can penetrate through a wheel disc of the rotating wheel 5 and be connected and fixed with the main shaft 2;

step 4, a sleeve 8 is connected to the top of the servomotor cylinder body 4 through a bolt, the sleeve 8 is connected to a plum blossom flange 9 through a bolt, and the plum blossom flange 9 is connected to the rotating wheel 5 through a bolt;

and 5, introducing pressure oil into the cavity of the servomotor 3, driving the rotating wheel 5 to be lifted to be jointed with the flange surface of the main shaft 2 by the upward movement of the servomotor cylinder body 4, connecting the rotating wheel 5 with the main shaft 2 by using a coupling bolt, releasing the connection between the servomotor 3 and the rotating wheel 5, and completing the installation.

Claims

1. A method for dismounting an impact runner is characterized by comprising the following specific steps:

step 1, connecting a servomotor piston (1) with a main shaft (2), then introducing oil pressure into a lower cavity of a servomotor (3) to lift a servomotor cylinder body (4) to the top, and then connecting the servomotor cylinder body (4) with a rotating wheel (5);

step 2, the rotating wheel (5) is disconnected from the main shaft (2), the servomotor (3) is decompressed, and the rotating wheel (5) naturally slides to the lowest point along with the servomotor cylinder body (4);

step 3, connecting the rotating wheel (5) with the main shaft (2);

step 4, detaching the servomotor (3) from the rotating wheel (5), communicating pressure oil to the servomotor (3), lifting the servomotor cylinder body (4) to penetrate through the rotating wheel (5) and lift the servomotor cylinder body to the top, and connecting the middle lower part of the cylinder body with the rotating wheel (5);

step 5, disconnecting the rotating wheel (5) from the main shaft (2);

step 6, the servomotor (3) is decompressed, and the rotating wheel (5) naturally slides to the lowest point along with the servomotor cylinder body (4);

and 7, after the bottom of the servomotor (3) is connected with a traveling mechanism (6), the servomotor piston (1) is disconnected with the main shaft (2), and the traveling mechanism (6) pushes the servomotor (3) and the rotating wheel (5) out of the rotating wheel chamber together for maintenance.

2. The method of claim 1, wherein the method further comprises: in step 1, servomotor piston (1) and flange axle (7) threaded connection, flange axle (7) through bolted connection in on main shaft (2), servomotor cylinder body (4) top bolted connection sleeve (8), sleeve (8) bolted connection plum blossom flange (9), plum blossom flange (9) through bolted connection on runner (5).

3. The impulse rotor dismounting method as claimed in claim 1 or 2, wherein: in the step 3, the rotating wheel (5) is connected with the main shaft (2) through a long screw (10), and the rotating wheel (5) can slide on the long screw (10).

4. The method of claim 3, wherein: in the step 4, a plum blossom flange (9) is arranged between the middle lower part of the cylinder body and the rotating wheel (5), and the plum blossom flanges (9) are respectively connected through bolts.