CN103956865B - Closed assembly yoke process in hydrogenerator stator same machine hole - Google Patents

Abstract

The process of closed assembly yoke is carried out in the invention discloses a kind of hydrogenerator stator same machine hole, this process uses in the case of machine hole inner stator, thrust axis bearing member complete to install, rotor field spider is hung in machine hole, on the basis of hydraulic turbine axis, adjust rotor field spider center consistent with unit axis, and carry out a kind of new technology of closed assembly yoke, the present invention can solve rotor rim and not carry out closed assembly in rotor clipping room, and overcomes stator and rotor to cheat, with machine, the problem that interior installing space is little.Use the present invention, the restriction of operating mode between the on-the-spot restriction to integral rotor crane capacity and in-site installation need not be considered, can likewise ensure that hydraulic generator rotor installation quality reaches the advantages such as standard-required.

Description

Closed assembly yoke process in hydrogenerator stator same machine hole

Technical field:

Closed assembly yoke is carried out in the invention discloses a kind of hydrogenerator stator same machine hole Process.

Background technology:

Rotor rim is the ingredient of electromotor magnetic circuit, is also the structure member of fixed magnetic pole. According to the structural shape of rotor rim, hydrogenerator is frequently with fan-shaped laminated yoke assembling knot Structure, utilizes staggered lamination process in layer to carry out closed assembly, and needs outside machine is cheated during lamination Rotor clipping room on the basis of carry out, installing space is big, and it is simple to install operating mode, treats rotor rim Lamination after mounting magnetic pole, carries out general assembly in hanging in machine hole, but this mounting means is applicable to new machine Group, and scene possesses certain crane capacity.For some capacity-increasing transformation units, by in-site installation Operating mode and the restriction of crane capacity, after in powerhouse of hydropower station, lifting appliance can not meet rotor assembling Integral lifting requirement, carries out the mode of yoke assembling in the most just cannot relying on rotor clipping room, Therefore, it not be used in clipping room closed assembly yoke in the urgent need to a kind of and be suitable for the work that installing space is little Process.

Summary of the invention:

Closed assembly yoke is carried out in the invention discloses a kind of hydrogenerator stator same machine hole Process, has and the most individually takies installing space, need not the overall feature promoting stator, fall Low installation cost, can overcome stator and rotor little with installing space in machine hole, and it is on-the-spot right to solve The restricted problem of integral rotor crane capacity, does not affect installation quality and installation period, equally may be used To guarantee that hydraulic generator rotor installation quality reaches standard-required.

The technical scheme is that

This process comprises the steps:

1) in addition to keep plate, the assembling of stator, thrust axis bearing member, lower bearing bracket and brake

All installations, in the case of need not promoting stator, closed assembly rotor magnetic in machine is cheated Yoke；

2) between two brake soleplates, mounting platform (2), this platform (2) position adjustment are set up Need joint welding after Hao on the basis of two brakes, prevent platform (2) play, for strengthening platform (2) Intensity, support by stay tube (6) in platform (2) lower section, stay tube (6) position falls Be placed on lower bearing bracket soleplate, stay tube (6) two ends put respectively on the basis of being welded in lower bearing bracket and Support platform (2) bottom surface；

3) with basis and on the basis of platform (2), brake and the thrust bearing oil sump set up for support Work surface, places that main stud props up stake tool (3), yoke supports voussoir (4), yoke props up respectively Pier (5), rotor arm supports instrument (1), and pre-adjustment props up the height of stake tool；

4) hanging in rotor field spider, in machine hole, internal rotor support arm directly puts off ring on thrust bearing oil sump In a stake tool (1) on plate, the bearing height of this stake tool (1) need to ensure in rotor Heart elevation is higher than actual installation elevation；

5) rotor field spider is individually fixed together with thrust collar, runner plate, runner plate and thrust bearing shoe valve it Between retention gap, adjust rotor field spider centrosome upper flange plane levelness≤0.02mm/m, On the basis of hydraulic turbine axis, adjust rotor field spider center consistent with unit axis；

6) also leveling yoke lower platen is installed, then carries out rim lamination, rim lamination process Middle minimizing uses copper hammer to beat yoke cylindrical shaping, protects stator, increases the convex key of yoke and yoke Punching gap, to 2mm, allows the convex key of yoke radially be in free state, and it is long and short fixed to use Position pin and the convex key of yoke, auxiliary bond integrated positioning, and utilize the little key of yoke the most whole at yoke internal diameter Shape, T tail shaping tool carries out yoke cylindrical shaping；

7) during lamination, increasing mobile short lamination pin with record stacking height, long lamination pin is always Stay in yoke, further take out before to the last compressing；

8) every lamination carries out precompressed after increasing 600mm height, in pre-compaction process, uses precompressed The combination precompressed of instrument screw rod, precompressed power transmission pipe, precompressed nut；

9) until precompressed rear magnetic yoke circularity, perpendicularity, radius, the most all reach design require after Installing product screw rod, instrument nut is replaced with product nut, often dismantles an instrument screw rod immediately Change product screw rod；

10) hydraulic elongator progressively symmetrical pressurization is used to tighten screw rod, it is ensured that elongate screw amount；

11) use heating plate to heat yoke together with heating rod, utilize plank and asbestos cloth, stone The combination of cotton-wadded quilt fire proofing material carries out insulated fire, allows yoke homogeneous heating, the loading little key of yoke arrive Specify position, stop heating；

12) at ambient temperature, check that yoke circularity, perpendicularity, radius and height dimension are full After foot requires, welding equipment card key, backplate and upper-lower wind shield, make an overall screening yoke unshakable in one's determination；

13) block and brake hoop are installed, by unit rotation direction, after brake hoop lower plane one piece Can not previous piece of protrusion of ratio, and total wave degree is not more than 1.5mm, the brake hoop of brake position Assembling can use brake jack-up mode to carry out, and wouldn't remove yoke and support voussoir (4), will system Dynamic device jack-up, first installs brake hoop in brakeless device position, and recycling jiggering auxiliary rotates rotor Support, makes the position of brake just under mounted brake hoop, continues to install remaining brake hoop, Yoke of now can dismantling supports voussoir (4), and rotor weight fully falls in brake.

Technique effect:

The present invention by completing above-mentioned technique content, building site ensure stator same machine hole in closed assembly Yoke.It is that this technique is sent out that the present invention significantly distinguishes with conventional rack rotor rim mounting process Bright realization carries out rotor rim closed assembly in hydrogenerator stator and rotor are cheated with machine, more overcomes work The problem that in-site installation space, ground is little, equipment crane capacity limits, reduces installation cost, it is ensured that Installation period.

Present invention could apply to umbrella-type medium and small transformation hydrogenerator units' installation, fixed, In the case of rotor is cheated with machine, overall need not promote stator, need not be by in-site installation space and set The restriction of standby crane capacity, effectively reduces installation cost, applies respond well, advantageously ensure that Units' installation quality.

Accompanying drawing illustrates:

Fig. 1 is the process schematic diagram of the interior closed assembly yoke in same machine hole

Fig. 2 is the support platform schematic diagram of the interior closed assembly yoke in machine hole

Fig. 3 is radius dimensional drawing table after the internal rotor rim superposition of machine hole

Fig. 4 is height dimension chart after the internal rotor rim superposition of machine hole

Detailed description of the invention:

Closed assembly yoke process in a kind of hydrogenerator stator same machine hole, this technique side Method comprises the steps:

(1) in addition to keep plate, the assembling of stator, thrust axis bearing member, lower bearing bracket and brake, All installations, in the case of need not promoting stator, as it is shown in figure 1, folded in machine is cheated Cartridge rotor yoke；

(2) as in figure 2 it is shown, set up mounting platform 2 between two brake soleplates, this Need joint welding after platform 2 position adjustment is good on the basis of two brakes, prevent platform 2 play, for Strengthening the intensity of platform 2, supported by a stay tube 6 below platform 2, stay tube 6 position falls On lower bearing bracket soleplate, stay tube 6 two ends is put on the basis of being welded in lower bearing bracket respectively and supports flat Platform 2 bottom surface；

(3) with basis and on the basis of platform 2, brake and the thrust bearing oil sump set up for supporting Work surface, place that main stud props up stake tool 3, yoke props up stake tool 4 respectively, 5, rotor support arm Prop up stake tool 1, and the height of stake tool is propped up in pre-adjustment；

(4) hanging in rotor field spider, in machine hole, internal rotor support arm directly puts off on thrust bearing oil sump In a stake tool 1 on ring flat-plate.The bearing height of this stake tool 1 need to ensure that rotor center is high Journey is higher than actual installation elevation；

(5) together with rotor field spider individually puts together on thrust collar, runner plate, runner plate and thrust bearing shoe valve Between retention gap, adjust rotor field spider centrosome upper flange plane levelness≤ 0.02mm/m, on the basis of hydraulic turbine axis, adjusts rotor field spider center and unit axis one Cause；

(6) also leveling yoke lower platen is installed, then carries out rim lamination, rim lamination mistake Journey reduces and uses copper hammer to beat yoke cylindrical shaping, protect stator, increase the convex key of yoke and magnetic Yoke punching gap, to 2mm, allows the convex key of yoke radially be in free state, uses long and short Alignment pin and the convex key of yoke, auxiliary bond integrated positioning, and utilize the little key of yoke outside at yoke internal diameter Shaping, T tail shaping tool carries out yoke cylindrical shaping；

(7), during lamination, mobile short lamination pin, long lamination pin one are increased with record stacking height Directly stay in yoke, further take out before to the last compressing；

(8) every lamination carries out precompressed after increasing 600mm height, in pre-compaction process, uses pre- The combination precompressed such as pressure instrument screw rod, precompressed power transmission pipe, precompressed nut；

(9) treating precompressed rear magnetic yoke circularity, perpendicularity, radius, highly, each portion reaches design Installing product screw rod after requirement, instrument nut is replaced with product nut, an instrument spiral shell of often dismantling Product screw rod changed immediately by bar；

(10) hydraulic elongator progressively symmetrical pressurization is used to tighten screw rod, it is ensured that elongate screw amount；

(11) use heating plate to heat yoke together with heating rod, utilize plank and asbestos cloth, Asbestos are carried out insulated fire by fire proofing material combination, allow yoke homogeneous heating, load the little key of yoke To specifying position, stop heating；

(12) at ambient temperature, the chis such as yoke circularity, perpendicularity, radius and height are checked After very little satisfied requirement, the parts such as welding equipment card key, backplate and upper-lower wind shield, make an overall screening yoke Unshakable in one's determination；

(13) block and brake hoop are installed, by unit rotation direction, after brake hoop lower plane one Block must not previous piece of protrusion of ratio, and total wave degree is not more than 1.5mm, the braking of brake position Ring assembling can use brake jack-up mode to carry out, and wouldn't remove yoke and support voussoir 4, will system Dynamic device jack-up, first installs brake hoop in brakeless device position, and recycling jiggering auxiliary rotates rotor Support, makes the position of brake just under mounted brake hoop, continues to install remaining brake hoop, Yoke of now can dismantling supports voussoir 4, and rotor weight fully falls in brake.

It is illustrated in figure 3 radius dimensional drawing table after the internal rotor rim superposition of machine hole.After rim superposition It is positioned at the radius size of yoke middle part less than upper/lower terminal radius size, entirety yoke half Footpath dimensional tolerance meets GB GB/T8564-2003 water-turbine unit technical specification and wants Ask.

It is illustrated in figure 4 height dimension chart after the internal rotor rim superposition of machine hole.After rim superposition Outside yoke height is less than inner side yoke height, and overall yoke height dimension tolerance meets GB GB/T8564-2003 water-turbine unit demand of technical standard.

Need to be with equipment:

● round frame surveyed by rotor

● keyway push broach

● dress pressure assembly (instrument screw rod, nut, power transmission pipe)

● support platform

● buttress

● location instrument

● assembly wrench

● hydraulic elongator and adnexa (sealing spare part, pipeline)

● hydraulic elongator dedicated pump

The present invention carries out closed assembly yoke in proposing a kind of hydrogenerator stator same machine hole Technique, solves that umbrella-type medium and small retrofitted unit in-site installation space is little, crane capacity limit A difficult problem for system, utilizes the interior installing space in machine hole to carry out the advantage of rotor installation, it is ensured that to install Quality and installation period.

Claims (1)

1. a closed assembly yoke process in hydrogenerator stator same machine hole, is characterized in that: This process comprises the steps:

1) in addition to keep plate, the assembling of stator, thrust axis bearing member, lower bearing bracket and brake All installations, in the case of need not promoting stator, closed assembly rotor rim in machine is cheated；

2) setting up mounting platform (2) between two brake soleplates, this platform (2) position is adjusted Whole good after need joint welding on two brake soleplates, prevent platform (2) play, flat for strengthening The intensity of platform (2), is supported by a stay tube (6) in platform (2) lower section, a stay tube (6) Position puts off on lower bearing bracket soleplate, and stay tube (6) two ends is put respectively and is welded in lower bearing bracket base On plinth plate and support platform (2) bottom surface；

3) with platform (2), brake and the thrust bearing oil sump set up on soleplate and soleplate it is Support works face, places main stud respectively and props up stake tool (3), yoke support voussoir (4), magnetic Yoke buttress (5), rotor arm supports instrument (1), and pre-adjustment props up the height of stake tool；

4) hanging in rotor field spider, in machine hole, internal rotor support arm directly puts off ring on thrust bearing oil sump In a stake tool (1) on plate, the bearing height of this stake tool (1) need to ensure in rotor Heart elevation is higher than actual installation elevation；

5) rotor field spider is individually fixed together with thrust collar, runner plate, runner plate and thrust bearing shoe valve it Between retention gap, adjust rotor field spider centrosome upper flange plane levelness≤0.02mm/m, On the basis of hydraulic turbine axis, adjust rotor field spider center consistent with unit axis；

6) also leveling yoke lower platen is installed, then carries out rim lamination, rim lamination process Middle minimizing uses copper hammer to beat yoke cylindrical shaping, protects stator, increases the convex key of yoke and yoke Punching gap, to 2mm, allows the convex key of yoke radially be in free state, uses long and short location Pin and the convex key of yoke, auxiliary bond integrated positioning, and utilize the little key of yoke in the outside shaping of yoke internal diameter, T tail shaping tool carries out yoke cylindrical shaping；

7) during lamination, increasing mobile short lamination pin with record stacking height, long lamination pin is always Stay in yoke, further take out before to the last compressing；

8) every lamination carries out precompressed after increasing 600mm height, in pre-compaction process, uses precompressed The combination precompressed of instrument screw rod, precompressed power transmission pipe, precompressed nut；

9) until precompressed rear magnetic yoke circularity, perpendicularity, radius, the most all reach design require after Installing product screw rod, instrument nut is replaced with product nut, often dismantles an instrument screw rod immediately Change product screw rod；

10) hydraulic elongator progressively symmetrical pressurization is used to tighten screw rod, it is ensured that elongate screw amount；

11) use heating plate to heat yoke together with heating rod, utilize plank and asbestos cloth, stone The combination of cotton-wadded quilt fire proofing material carries out insulated fire, allows yoke homogeneous heating, the loading little key of yoke arrive Specify position, stop heating；

12) at ambient temperature, check that yoke circularity, perpendicularity, radius and height dimension are full After foot requires, welding equipment card key, backplate and upper-lower wind shield, make an overall screening yoke unshakable in one's determination；

13) block and brake hoop are installed, by unit rotation direction, after brake hoop lower plane one piece Can not previous piece of protrusion of ratio, and total wave degree is not more than 1.5mm, the brake hoop of brake position Assembling can use brake jack-up mode to carry out, and wouldn't remove yoke and support voussoir (4), will system Dynamic device jack-up, first installs brake hoop in brakeless device position, and recycling jiggering auxiliary rotates rotor Support, makes the position of brake just under mounted brake hoop, continues to install remaining brake hoop, Yoke of now can dismantling supports voussoir (4), and rotor weight fully falls in brake.