CN212044458U

CN212044458U - Centering device for rotor center body and generator shaft pin hole of hydroelectric generating set

Info

Publication number: CN212044458U
Application number: CN202020689658.9U
Authority: CN
Inventors: 何强锋; 何佳; 陈媛
Original assignee: China Yangtze Power Co Ltd
Current assignee: China Yangtze Power Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-12-01
Anticipated expiration: 2030-04-29

Abstract

The utility model provides a hydroelectric set rotor center body and generator shaft pinhole centering device, including at least three telescopic machanism, telescopic machanism's tail end interconnect, telescopic machanism's flexible end is equipped with the baffle, and the baffle top is passed through coupling mechanism and is connected with the couple. The device can quickly and accurately complete the centering work of the rotor central body and the shaft pin hole of the generator.

Description

Centering device for rotor center body and generator shaft pin hole of hydroelectric generating set

Technical Field

The utility model belongs to the technical field of hydraulic turbine processing is relevant, in particular to hydroelectric set rotor center body and generator shaft pinhole centering device.

Background

When the hydro-turbo generator set carries out centering work of a rotor central body and a shaft pin hole of the generator, the problems of low efficiency, long time, serious occupation of human resources and the like exist all the time. In a traditional mode, two groups of inverted chains are symmetrically arranged below a rotor magnetic yoke, and the inverted chains are pulled manually to enable a rotor to rotate so as to perform centering work on a rotor central body and a generator shaft pin hole. On one hand, the chain block stroke is short, the diameter of a rotor is large, the rotor needs to be frequently switched, time and labor are wasted, and in order to ensure the continuity of operation, more human resources are occupied, which usually reaches more than 10 people; on the other hand, technicians are required to observe the centering condition of the pin holes in the rotor center body and timely install the pins into the pin holes, and the occupied human resources generally reach about 5 people. The two operations need to be matched skillfully, otherwise, the centering operation of the pin hole is difficult to complete.

At present, no device for centering a rotor central body and a generator shaft pin hole of a hydroelectric generating set exists in China, the method is still adopted at present, and based on the condition, the device for centering the rotor central body and the generator shaft pin hole is designed, so that the centering work of the rotor central body and the generator shaft pin hole can be completed quickly, effectively and accurately, and the use of human resources is greatly reduced.

Disclosure of Invention

The utility model aims to solve the technical problem that a centering device of a rotor central body and a generator shaft pin hole of a hydraulic generator set is provided, and the centering work of the rotor central body and the generator shaft pin hole can be rapidly and accurately completed.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a centering device for a rotor center body and a generator shaft pin hole of a hydroelectric generating set comprises at least three telescopic mechanisms, the tail ends of the telescopic mechanisms are connected with each other, a baffle is arranged at the telescopic end of each telescopic mechanism, and the top of each baffle is connected with a hook through a connecting mechanism.

In a preferred scheme, the telescopic mechanism is a hydraulic jack.

In a preferred scheme, the connecting mechanism is a screw rod, and the screw rod is connected with a threaded hole in the hook through a thread pair.

In a preferred scheme, the baffle is an arc-shaped plate bending towards the telescopic mechanism.

In a preferred scheme, the number of the telescopic mechanisms is three, and an included angle between the three telescopic mechanisms is 120 degrees.

The utility model provides a pair of hydroelectric set rotor central body and generator shaft pinhole centering device has following beneficial effect:

1. the device has the advantages of simple structure, low cost, convenient field installation, simple operation, safety and reliability, and can quickly, effectively and accurately complete the centering work of the rotor central body and the shaft pin hole of the generator.

2. The device can effectively replace the traditional mode of manually pulling and rewinding the chain, greatly reduces the labor intensity, saves the overhaul period, and improves the safety and the working efficiency of equipment overhaul.

3. The device can be applied to the construction of similar operations in hydropower and related industries, and has good universality and obvious industrial popularization value.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the installation of the present invention in use;

in the figure: telescopic machanism 1, baffle 2, couple 3, screw rod 4.

Detailed Description

As shown in figure 1, a hydroelectric set rotor central body and generator shaft pinhole centering device, including at least three telescopic machanism 1, telescopic machanism 1's tail end interconnect, telescopic machanism 1's flexible end is equipped with baffle 2, in this embodiment, telescopic machanism 1's quantity is three, three telescopic machanism 1's contained angle is 120, thereby make baffle 2 and pinhole inner wall form three point symmetry and support, because three point support has reduced the requirement of telescopic machanism 1 synchronism, 2 tops of baffle are passed through coupling mechanism and are connected with couple 3, coupling mechanism can choose for use the connecting rod.

In this embodiment, the telescoping mechanism 1 is a hydraulic jack. The hydraulic jack can also be replaced by a cylinder and the like.

Preferably, the connecting mechanism is a screw rod 4, and the screw rod 4 is connected with a threaded hole in the hook 3 through a thread pair. Through rotating the hook 3, the position of the hook 3 relative to the telescopic mechanism 1 can be adjusted, so that the position can be adjusted according to the heights of different pin holes.

The baffle 2 is an arc-shaped plate bending towards the telescopic mechanism 1. The arc-shaped plate can be attached to the inner wall of the pin hole.

When the telescopic mechanism is used specifically, the type of the telescopic mechanism 1 is selected, for example, a rotor is pulled by manpower to use a 2T chain block, a single side can be pulled, and the force arm is 7475mm in size. The pin hole reference circle radius is 1425mm, the tonnage of the hydraulic jack is calculated to be 10.5T, and the hydraulic jack can be ensured to meet the use condition from the numerical calculation; the position of the hook 3 is adjusted to enable the baffle 2 to be positioned at the same height position; then the device is arranged at the pin hole joint position of the central body and the generator shaft, as shown in figure 2, the baffle 2 is positioned at the joint position, and the hook 3 is erected at the upper plane of the pin hole of the central body; and a manual oil pump is connected, pressure oil is introduced, the piston of the hydraulic jack is ejected out, the baffle 2 is contacted with the inner wall of the pin hole, force is continuously applied, and the pin hole centering of the rotor central body and the generator shaft is completed.

The device utilizes three points to determine a triangle, the triangle determines a circumcircle, the three baffle plates 2 are simultaneously positioned in pin holes of the central body and the generator shaft, and then the pin holes of the central body and the generator shaft are concentric, and based on the principle, the device designs a hydraulic jack which forms an angle of 120 degrees with each other and forms three-point support with the pin hole walls. And the requirement of the synchronism of three pistons of the hydraulic jack is reduced due to three-point support.

The device simple structure, low cost, on-the-spot simple to operate, easy operation, safe and reliable can accomplish the centering work of rotor central body and generator axle pinhole fast, effectively, accurately, use the device can effectively replace traditional manpower and draw the mode of chain fall, and to a great extent has reduced intensity of labour, has saved the maintenance time limit for a project, has improved the security and the work efficiency of overhaul of the equipments, and the device can apply to the construction of water and electricity and relevant trade similar operation, has good commonality and apparent trade spreading value.

Claims

1. The utility model provides a hydroelectric set rotor central body and generator shaft pinhole centering device which characterized in that: the telescopic hook comprises at least three telescopic mechanisms (1), the tail ends of the telescopic mechanisms (1) are connected with each other, a baffle (2) is arranged at the telescopic end of the telescopic mechanism (1), and the top of the baffle (2) is connected with a hook (3) through a connecting mechanism.

2. The device for aligning a rotor center body of a hydroelectric generating set with a shaft pin hole of a generator according to claim 1, wherein: the telescopic mechanism (1) is a hydraulic jack.

3. The device for aligning a rotor center body of a hydroelectric generating set with a shaft pin hole of a generator according to claim 1, wherein: the connecting mechanism is a screw rod (4), and the screw rod (4) is connected with a threaded hole in the hook (3) through a thread pair.

4. The device for aligning a rotor center body of a hydroelectric generating set with a shaft pin hole of a generator according to claim 1, wherein: the baffle (2) is an arc-shaped plate bending towards the telescopic mechanism (1).

5. The device for aligning a rotor center body of a hydroelectric generating set with a shaft pin hole of a generator according to claim 1, wherein: the number of the telescopic mechanisms (1) is three, and the included angle between the three telescopic mechanisms (1) is 120 degrees.