CN102744588A

CN102744588A - Method for inserting generator rotor of gas-filling condensing steam turbine unit

Info

Publication number: CN102744588A
Application number: CN2012102478682A
Authority: CN
Inventors: 王�琦; 徐世红; 武振海; 杨配良; 龚强
Original assignee: ANGANG CONSTRUCTION CONSORTIUM Co Ltd
Current assignee: ANGANG CONSTRUCTION CONSORTIUM Co Ltd
Priority date: 2012-07-16
Filing date: 2012-07-16
Publication date: 2012-10-24

Abstract

The invention relates to the field of steam turbine units, and in particular relates to a method for inserting a generator rotor of a gas-filling condensing steam turbine unit. The method is characterized in that a connecting shaft is arranged at the steam end of the generator rotor and a balance weight is hanged at the exciter end. The method comprises the operation steps of: (1), connecting the connecting shaft with the steam end of the generator rotor, and hanging a rear bearing base of a generator on a shaft neck of the exciter to be used as the balance weight; (2), lifting the rotor to be in a horizontal state; (3) slowing inserting the steam end into a stator; (4) moving a lifting point to the root part of the connecting shaft until the connecting shaft end is close to a back wheel of the steam turbine; (5) moving the lifting point to the steam end of the rotor; (6), continuously drafting the rotor by using a chain block until a shaft coupler at the steam end is close to the back wheel, and connecting the steam end with the back wheel of the steam turbine; and (7) rotating the rotor after the rotor is in position. Compared with the prior art, the method has the beneficial effects of stability, efficiency, safety, good social benefit and economic benefit; and moreover, the operation skills are easy to manage.

Description

The method that tonifying Qi condensing turbine group generator amature installs

Technical field

The present invention relates to tonifying Qi condensing turbine group maintenance field, relate in particular to the method that a kind of tonifying Qi condensing turbine group generator amature installs.

Background technology

Both at home and abroad in the installation, maintenance of tonifying Qi condensing turbine group, mostly adopt and establish the commentaries on classics of wearing that the slide plate slide block carries out rotor in the stator, promptly when generator amature installs at present; In stator core, lay arc skateboard, on arc skateboard, place slide block device, utilize a day handlebar rotor to sling earlier; The rotor front portion is penetrated stator; Put down rotor the anterior center of gravity of rotor is dropped on the stator arc slide plate, the rear portion moves on to the rotor afterbody by the sleeper load-bearing with the overhead traveling crane hoist cable; Rotor is sling; Utilize the chain block be installed on the stator to cooperate overhead traveling crane that rotor is installed in the stator core again, till the length that rotor vapour end exposes support can tangle lifting rope, cooperate rotor installed by overhead traveling crane again to put in place.This weak point that installs method is to want earlier arc skateboard to be set in stator core, after installing, also will remove arc skateboard, complicated operation; Crane can not obtain effective output in the process of installing, mainly use the chain block acting, and maintenance efficiency is reduced, and labour intensity is big, is prone to take place the security incident of scratch stator, influences construction speed and repair quality.

Summary of the invention

The method that the object of the present invention is to provide a kind of tonifying Qi condensing turbine group generator amature to install, easy construction, safety and stability, effect are remarkable, improve maintenance efficiency, reduce labor intensity, and the reduction of erection time, guarantee to install quality.

For solving the problems of the technologies described above, technical scheme of the present invention is:

The method that tonifying Qi condensing turbine group generator amature installs connects axle in the vapour end setting of generator amature and articulates counterweight with exciter end, changes the centroid position of rotor, the convenient lifting, and its concrete operations step is following:

1) will connect axle and be connected, the generator rear bearing seat will be hung on the exciter end axle journal as counterweight, confirm the lifting center and the mark of generator amature with the vapour end of generator amature;

2) crane from the lifting center rotor of slinging, the adjustment rotor is in level;

3) generator amature is slowly penetrated in the stator by the vapour end, after connecing shaft end and stretching out stator, interim support one is set connecing between shaft end and the generator platen;

4) Heave Here of crane is moved to connect a root; Rolling bar and oiling are set between generator rear bearing seat and foundation of civil work; With the crane rotor of slinging; Remove interim support one, with the exciter end of the chain block difference tractive rotor that is fixed on the stator both sides, up to connecing shaft end near the steam turbine clutch;

5) between the vapour end shaft coupling of rotor and generator platen, interim support two is set, the Heave Here of crane is moved to the vapour end-journal place of rotor, remove and connect axle and connect the shaft coupling on the axle;

6) the crane rotor of slinging is removed interim support two, continues the exciter end of tractive rotor with the chain block that is fixed on the stator both sides,, near the steam turbine clutch vapour end shaft coupling is connected with steam turbine clutch shaft coupling up to vapour end shaft coupling;

7) rotor in place after, the front-end bearing pedestal of rotor vapour end is installed, remove epitrochanterian steel wire rope, the position of rear bearing block is met design requirement, the moving rotor of dish, rotor rotation steadily, equal speed, no abnormal sound gets final product.

The said axial length 750-850mm that connects.

Compared with prior art; The invention has the beneficial effects as follows: 1) pass through the practice of 25MW Turbo-generator Set and 20MW Turbo-generator Set; Proof adopts the rotor method that installs of " the spreading axle is hung counterweight " not only to save operating expenses, has shortened the duration, has improved to install quality; And have stable, efficient, safe characteristics, its hints on operation easy master.2) created necessary condition for the generating in advance of power plant, this method also is adapted at promoting in other the similar item, has good social benefit and economic benefit.

Description of drawings

Fig. 1 is embodiment of the invention duty one structural representation;

Fig. 2 is embodiment of the invention duty two structural representations;

Fig. 3 is embodiment of the invention duty three structural representations;

Fig. 4 is embodiment of the invention duty four structural representations;

Fig. 5 is that the embodiment of the invention installs the done state structural representation.

Among the figure: 1-rotor 2-vapour end 3-connects interim two a 17-front-end bearing pedestal 18-foundation of civil work that support of the interim 13-rolling bar 14-steam turbine clutch 15-vapour end shaft coupling 16-of support of 4-rear bearing block 5-exciter end 6-lifting center 7-steel wire rope 8-crane 9-chain block 10-stator 11-generator platen 12-

The specific embodiment

Be described further below in conjunction with the accompanying drawing specific embodiments of the invention:

The method that a kind of tonifying Qi condensing turbine of the present invention group generator amature installs is to connect axle and articulate counterweight with exciter end 5 through being provided with at the vapour end of generator amature 2, and the centroid position of change rotor 1 makes that rotor is more convenient to install, and its concrete operations step is following:

1) sees Fig. 1; Be connected with the vapour end shaft coupling 15 of rotor 1 connecing axle 3; Rear bearing block 4 is hung on exciter end 5 axle journals as counterweight; Confirm the lifting center 6 and the mark of

rotor

1,4 of exciter end 5 axle journals and generator rear bearing seats should be established soft bedding and padding, prevent that rear bearing block 4 is along the axle journal play.Meet axle 3 long 750-850mm;

2) steel wire rope 7 is twined a circle and locking in 6 positions, lifting center, anti-sliding stop is with crane 8 rotor 1 of slinging; Rotor 1 should be in level; As out-of-level, then add weight equalizer in the light side of rotor, note must not damaging rotor surface when steel wire rope twines; A 5t chain block 9 is set, in order to dilatory rotor respectively in the generator unit stator both sides;

3) see Fig. 2, rotor is slowly penetrated in the stator 10 by vapour end 2, after connecing axle 3 ends stretch out stator 10, connecing the interim support 1 that chock and so on is set between axle 3 ends and the generator platen 11;

4) see Fig. 3, the Heave Here of crane is moved to connect axle 3 roots, the 13 also oilings of Φ 10 round steel rolling bars are set between rear bearing block 4 and foundation of civil work 18; With the crane rotor of slinging, remove interim support 1, with the chain block that is fixed on the stator both sides 9 exciter end of tractive rotors 1 respectively; Should slowly, steadily prevent rotor swing during penetrate rotor, rotor and steel wire rope all must not abrade stator internal and insulation; In penetrating process; Should there be the people in stator, to hold up steady rotor, in case spline rocks, up to connecing axle 3 ends near steam turbine clutch 14;

5) see Fig. 4, between the vapour end shaft coupling 15 of rotor and generator platen 11, interim support 2 16 is set, the Heave Here of crane is moved to the vapour end 2 axle journal places of rotor, remove the shaft coupling that connects axle 3 and connect axle 3 sides;

6) the crane rotor 1 of slinging; Remove interim support 2 16; Continue the exciter end of tractive rotor with the chain block that is fixed on the stator both sides 9; The both sides chain block should be slowly, steadily, equal speed,, near steam turbine clutch 14 installation sites vapour end shaft coupling 15 is connected with steam turbine clutch 14 side shaft couplings up to vapour end shaft coupling 15;

7) see Fig. 5, after rotor was in place, the front-end bearing pedestal 17 of installation rotor vapour end was removed epitrochanterian steel wire rope, and adjustment meets design requirement the position of rear bearing block 4, the moving rotor 1 of dish, and steady, the equal speed of rotor rotation, no abnormal sound gets final product.

Claims

1. the method that installs of tonifying Qi condensing turbine group generator amature is characterized in that, connects axle in the vapour end setting of generator amature and articulates counterweight with exciter end, changes the centroid position of rotor, the convenient lifting, and its concrete operations step is following:

2. the method that tonifying Qi condensing turbine group generator amature according to claim 1 installs is characterized in that, the said axial length 750-850mm that connects.