CN210036492U

CN210036492U - Centering device for rotor and partition plate of steam turbine

Info

Publication number: CN210036492U
Application number: CN201920731913.9U
Authority: CN
Inventors: 梅天娇; 朱明明
Original assignee: Nanjing Steam Turbine Power Technology Co Ltd
Current assignee: Nanjing Steam Turbine Power Technology Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-02-07
Anticipated expiration: 2029-05-21

Abstract

The utility model provides a steam turbine rotor and baffle centering device, including seamless steel pipe, two axle sleeves, clamping ring and vexed head, two the axle sleeve is fixed ground cover respectively and is located seamless steel pipe's both ends, seamless steel pipe's one end is equipped with the vexed head, it is equipped with to go back on the seamless steel pipe fixedly the clamping ring, the clamping ring is located two between the axle sleeve on the seamless steel pipe. The utility model aims at providing a steam turbine rotor and baffle centering device uses the false shaft method, and the workman's operation of being convenient for adopts seamless steel pipe long service life, and measured data is accurate reliable.

Description

Centering device for rotor and partition plate of steam turbine

Technical Field

The utility model particularly relates to a steam turbine rotor and baffle centering device.

Background

At the later stage of the installation of the steam turbine at present, a method for centering the steam turbine is very important and delicate work, and can influence the vibration level during later operation. At present, the conditions that the vibration of a unit exceeds standard, collision and abrasion occur between a moving part and a static part, the temperature of a bearing is increased and the like are found when a plurality of steam turbine rotors run. Such a situation occurs because the alignment of the center of the rotor is not accurate when the steam turbine is installed;

because the gravity center of the steam turbine rotor, namely the maximum disturbance value, is not positioned at the center of the center line of the front bearing and the rear bearing, the center line of the rotor is simulated into a mathematical model (see figure 1) of two parabolas, after the mathematical model is determined, actual operation is required to be carried out to meet the data requirement (figure 1), and a section shaft which is as long as the shaft of the steam turbine rotor and has the outer circle as well as the shaft diameter of the rotor shaft is required to be prepared by a false shaft method to replace the rotor to find the center of the partition plate, namely the false shaft.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a steam turbine rotor and baffle centering device uses the false shaft method, and the workman's operation of being convenient for adopts seamless steel pipe long service life, and measured data is accurate reliable.

The utility model provides a following technical scheme:

the utility model provides a steam turbine rotor and baffle centering device, includes seamless steel pipe, two axle sleeves, clamping ring and vexed head, two the axle sleeve is fixed ground respectively and is located the both ends of seamless steel pipe, the one end of seamless steel pipe is equipped with the vexed head, still fixedly the cover is equipped with on the seamless steel pipe the clamping ring, the clamping ring is located two between the axle sleeve on the seamless steel pipe.

Preferably, the clamping ring comprises two C-shaped hoops, openings of the two C-shaped hoops are arranged oppositely, and two opposite ends of the two C-shaped hoops are correspondingly provided with locking screw holes.

Preferably, both ends of the two C-shaped hoops are fixedly connected through a set screw.

Preferably, the two C-shaped hoops are oppositely sleeved on the seamless steel pipe.

Preferably, one end of the set screw passes through the locking screw holes of the two C-shaped hoops and is provided with a nut.

Preferably, the two shaft sleeves are sleeved on the seamless steel pipe through fixing screws.

Preferably, the fixing screw is a socket head cap locking screw.

The utility model has the advantages that: the dummy shaft of the utility model selects seamless steel pipes, and has long service life, higher concentricity and high surface smoothness; the purpose of using the shaft sleeve can be to rotate freely on the bearing bush and keep the center unchanged; the purpose of the clamping ring is to fix the rotor and the seamless steel tube so as to prevent the seamless steel tube from shaking and being indefinite in center when rotating and ensure that the measured data is accurate and reliable; the utility model discloses put into the cylinder the inside with seamless steel pipe during the measurement, the cylinder contains front and back axle bush, puts into front and back bearing bush with the axle sleeve at the both ends on the seamless steel pipe, puts the percentage table on seamless steel pipe's corresponding position, rotates seamless steel pipe, and the degree begins during the rotation, and the deviation value can be reflected to the reading of percentage table, simple structure, the operation of being convenient for.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a plot of relative deflection of a rotor and a dummy shaft;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic structural view of the clamp ring of the present invention;

labeled as: 1. choke plug; 2. a shaft sleeve; 3. clamping a ring; 4. tightening the screw; 5. seamless steel pipes; 6. C-shaped hoop; 7. a nut; 8-1. a false shaft deflection curve; 8-2, relative deflection value; 8-3 rotor deflection curve; 8-4 front bearing center line; 8-5, the center line of the rear bearing.

Detailed Description

As shown in fig. 1, a centering device for a steam turbine rotor and a partition plate comprises a seamless steel tube 5, two shaft sleeves 2, a clamping ring 3 and a choke plug 1, wherein the seamless steel tube 5 is selected as a dummy shaft, so that the service life is long, the concentricity is high and the surface smoothness is high;

the two shaft sleeves 2 are respectively fixedly sleeved at two ends of the seamless steel pipe 5 through fixing screws, the fixing screws are inner hexagonal locking screws, the seamless steel pipe 5 cannot be directly placed in the bearing bushes as the cylinder is provided with the front bearing bush and the rear bearing bush, the shaft sleeves 2 at two ends of the seamless steel pipe 5 are placed in the front bearing bush and the rear bearing bush of the cylinder, the rotation and the increase of concentricity are facilitated, and the problem that the gap problem or the inaccurate measurement precision occurs when the seamless steel pipe 5 is directly placed in the bearing bushes is avoided;

one end of the seamless steel pipe 5 is also provided with a choke plug 1 for placing the seamless steel pipe 5 with the end part deformed; the seamless steel tube 5 is also fixedly sleeved with a clamping ring 3, and the clamping ring 3 is arranged on the seamless steel tube 5 between the two shaft sleeves 2 and used for fixing the rotor and the seamless steel tube 5, so that the seamless steel tube 5 can rotate freely and the center is ensured to be unchanged.

Specifically, as shown in fig. 2, the clamping ring 3 includes two C-shaped hoops 6, the two C-shaped hoops 6 are oppositely opened, the two opposite ends of the two C-shaped hoops 6 are correspondingly provided with locking screw holes, one end of the set screw 4 penetrates through the locking screw holes of the two C-shaped hoops 6 and is provided with a nut 7, the two opposite ends of the two C-shaped hoops 6 are fixed with the nut 7 through the set screw 4, and the two C-shaped hoops 6 are oppositely sleeved on the seamless steel pipe 5.

As shown in figure 1, the steam turbine rotor and partition plate centering device is characterized in that a seamless steel pipe 5 is placed into a cylinder during measurement, shaft sleeves 2 at two ends of the seamless steel pipe 5 are placed into front and rear bearing bushes of the cylinder, a dial indicator is placed at a corresponding position of the seamless steel pipe 5, the seamless steel pipe 5 is rotated, the number of degrees starts during rotation, the reading of the dial indicator can reflect a central deviation value, measurement data are accurate and reliable, the structure is simple, learning is not needed, and operation of operators is facilitated.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The centering device for the steam turbine rotor and the partition plate is characterized by comprising a seamless steel pipe, two shaft sleeves, a clamping ring and a choke plug, wherein the two shaft sleeves are respectively and fixedly sleeved at two ends of the seamless steel pipe, the choke plug is arranged at one end of the seamless steel pipe, the clamping ring is further and fixedly sleeved on the seamless steel pipe, and the clamping ring is arranged on the seamless steel pipe between the two shaft sleeves.

2. A turbine rotor and diaphragm centering device as claimed in claim 1, wherein said clamp ring comprises two C-shaped hoops, said two C-shaped hoops having openings opposite to each other, and locking screw holes being provided at opposite ends of each of said two C-shaped hoops.

3. A turbine rotor and diaphragm centering device as claimed in claim 2, wherein both ends of said C-shaped hoops are fixedly attached by set screws.

4. A turbine rotor and diaphragm centering device as claimed in claim 3, wherein two of said C-shaped hoops are oppositely sleeved on said seamless steel tube.

5. A turbine rotor and diaphragm centering device as claimed in claim 4, wherein one end of said set screw passes through the locknut holes of both said C-hoops and is provided with a nut.

6. The turbine rotor and diaphragm centering device of claim 1, wherein two of said bushings are mounted on said seamless steel tube by means of set screws.

7. A turbine rotor and diaphragm centering device as claimed in claim 6, wherein said set screw is a socket head locking screw.