CN104467305B - 1000 MW electric generator stator transport interface part assembling method - Google Patents

Abstract

The invention aims at providing a 1000 MW electric generator stator transport interface part assembling method which is applied to preparation work before 1000 MW electric generator stator transport. By means of the method, the problems and potential unsafe hazards of an existing installation method are eliminated, the accuracy of the assembling relationship and assembling size is ensured, the relationship of an electric generator stator and a vehicle is correct, the structure combination deformation meets the expected requirements, the influences of abnormal gaps on stress distribution changes are eliminated, the correct assembling relationship between a connecting rod and a spherical washer set is ensured, the abnormal initial stress of root parts of ear plates is eliminated, and it is ensured that the correct initial stress of the connecting rod is obtained. Due to the application of a measurement bracket, the bending sink amount and changes of a machine base of the electric generator stator are accurately monitored, the real-time data for ensuring the transport safety are obtained, and guarantees are provided for subsequent correct vehicle combination, safe transport and transport monitoring.

Description

1000MW generator unit stators transport interface unit assembly method

Technical field：The present invention relates to a kind of 1000MW generator unit stators transport interface unit assembly method.

Background technology：1000MW grades of ultra supercritical steam turbine generating set has the advantages that efficiency of fire coal is high, clean environment firendly, symbol The requirement of national energy development policies is closed, the increase of generating set single-machine capacity turns into development trend, generator design problems faced Be its stator size and weight exceed transportation limitation, inland transport turn into bottlenecks problem.

Heavy-duty generator stator transportation problem is solved to design electricity generator stator stand using inside and outside support design Into inside and outside two parts, the work such as the inserting of inside and outside support are carried out in building site, the dimension and weight of inner stator is all relatively with the whole of capacity Body stator is small, reduces transport difficulty, though inner stator has the advantages that to be readily transported compared with one-piece stator, being constructed in subsequent field needs Special process is equipped and builds interim factory building, assembly precision control, the protection of insulation system under the conditions of simple and crude technological equipment, A series of problems, such as tissue of construction is obviously prolonged with construction period control, on-site construction time compared with one-piece stator, manufactory and User must work hard and give way to this.

The comprehensive consideration such as collateral security generator performance and construction period, is still optimal choosing using stator whole Transporting Select, insulating properties are the key issues for influenceing generator reliability, stator whole assembling process is completed in manufactory can be more preferably Guarantee generator performance, be also convenient for transport and store process protected working, can to greatest extent ensure product quality simultaneously Shorten the site operation cycle, fully meet family interests demand, be also beneficial to reduce production cost and cost of transportation for manufactory； But whole Transporting is limited by the constraint of railroad bridge, vehicle bearing capacity and track clearance, it is necessary to consider simultaneously at the design initial stage Solve these limiting factors.

In Railway Transport Industry, this kind of large cargo transport of large turbo-type generator stator belongs to large and lengthy cargo transport, transports Defeated vehicle structure form has stronger specific aim, and suitable special vehicle is the premise that can transport be implemented, and these vehicles It is directed to what demand was developed, stator of steam turbine generator section is large, itself stiffness is high, is adapted to using schnabel car transport.

1000MW generator unit stators entirety railway transportation scheme uses the transport interface unit of transport flange form, for fortune Defeated flange has that significantly loss of weight causes stiffness reduction for otic placode Root Stress concentration problem and out frame, using carrying Top blind flange and bottom prestressing force direct connection coupling bar structure, transport interface unit are schnabel car transport 1000MW generator unit stators Critical component, is related to the integrality of vehicle, is responsible for the transmission of static(al) and transport shocks power, is applied by clamp beam pin-and-hole and compression leg Huge concentrfated load to be delivered to the positions such as support crust by transporting interface unit；Connecting bolt is by transport flange and stator Entirety is connected to become, connecting bolt not only provides engagement surface pressure herein, and undertakes pulling force, is the company of transport flange and stator Medium is connect, Transport Safety is counted for much, stressing conditions are special, give clamp force numerical value to be different from usual way, to provide enough Clamp force and itself have enough safety coefficients.

Traffic program encourages two ends transport flange using direct connection coupling bar connection vapour, prestressing force is applied before entrucking, by beating head Formula concave spherical surface connection pole socket is directly contacted with otic placode bottom extended structure, is formed mother metal and is hinged force transferring structure, it is to avoid welding structure Bear high stress, concave spherical surface connection pole socket forms self-regulated core structure with convex spherical packing ring, make the direct connection coupling bar stress can be with It is reduced to two power bars, it is to avoid bear moment of flexure additional stress, improves use intensity.Above-mentioned way can effectively reduce transport flange and The high stress and connecting bolt stress of support dangerous position, advantageously ensure that transportation safety, and part pulling force passes through direct connection coupling bar Directly transmit, reduce the stress of stator and transport flange connecting bolt, it is ensured that connection pressure and globality.The drawing of direct connection coupling bar Coefficient of elasticity is stretched far below integrally-built elongation eleasticity factor, dynamic and static load can be made to be respectively subjected to by different structure, direct connection Coupling bar is influenceed small by dynamic loading, can apply pulling force higher, makes the static(al) reduction that transport flange connecting bolt bears, dynamic load Lotus ability to take the burden is improved, highly beneficial to ensureing transportation safety.

Transport flange, the stress of support and connecting bolt stress can be not only reduced using direct connection coupling bar, it is ensured that transport Safety, but also the moment of flexure that support is produced by the clamping force of schnabel car can be reduced, reduce flexural deformation degree, it is to avoid to generating electricity Machine stator iron core suspended structure etc. produces hazard factor, and rationally the prestressing force of control direct connection coupling bar can make deflection deformation degree Control is within the acceptable range.

Because 1000MW generator unit stators entirety railway transportation scenario-frame is complicated, be related to transport flange, connecting bolt, The structures such as direct connection coupling bar, above-mentioned part and generator unit stator turn into vehicle rail structure after car is closed, and are related to traffic safety Problem；Textural association deformation causes stress distribution situation of change complicated after entrucking, and such as load step and prestressing force parameter is unreasonable Part-structure local stress is easily caused to exceed permissible value, harm transportation safety even causes serious driving accident, so in dress The preparation of Chinese herbaceous peony, including transport interface unit and generator unit stator including transport flange, connecting bolt, direct connection coupling bar Connection installation step must strictly control, be otherwise unable to reach stator and couple parameter and correct structure with the correct of vehicle Prestressing force parameter；And due to structure, size, weight, assembly relation limitation, 1000MW generator unit stators transport interface unit dress There are strict requirements with step and method.

Generator unit stator transport interface unit installation step before transport entrucking in the past is with method according to structure design and fortune The monitor in real time project that defeated monitoring unit is formulated is formulated, and some problems, such as paper are there occurs in practice《1000MW steamers are sent out Preparation before motor stator railway transportation》(article numbering 1005-006X (2013) 04-0057-02),《DQ₄₅Type clamp type goods Car end cap mode transports 1000MW generator unit stator experimental studies》(article numbering 1001-4632 (2011) 04-0109-08) is chatted These problems are stated, the subject matter for existing is that key position stress monitoring primary stress measured deviation is too high, structural stress point Cloth deviates desired value, the change of out frame bending subsidence amount and is difficult to the problems such as monitoring, and causes load step to be repeated, and expends people Power material resources, influence or delay the arrangement of transport project, and leave transportation safety hidden danger.

For the problem that transport is present in the past, subsequent transportation is to the generator unit stator transport interface unit assembling side before transport Method has carried out substantial change, it is proposed that partial alteration's structure, and according to partial alteration's structure change or has newly increased assembling Step requirement, forms the installation step of complete specification, eliminates the not enough and problem hidden danger of previous methods, forms this hair It is bright, it is ensured that the security implementation of 1000MW generator unit stators transport.

The content of the invention：It is an object of the invention to provide a kind of 1000MW generator unit stators transport interface unit assembly method, Weak point and hidden danger that previous methods are present are eliminated, postorder is closed car step is correctly carried out, and reaches stator and vehicle Correct connection parameter and correct construction pre-stress parameter, ensure generator unit stator transport safety.

The technical scheme is that：Assembling process follow these steps to carry out：

Step one：Assembling cover plate step：Cover plate is tentatively in place, cover forward end is uniformly protruded end face of machine base 0.3mm- , conjunction be fixed on out frame cover plate with bolt by 0.5mm, and a tight bolt, bolt exists clamp force square to 4 screws in interval Between 400Nm-500Nm；Welding block, after weld seam is cooled to room temperature, checks the gap between block and cover plate, if Gap is more than 0.01mm, with pad, unscrews bolt, applies jacking force in cover forward end, and check cover forward end, it is desirable to prominent machine The numerical value of seat end face is in 0.1mm-0.5mm, and two side errors are less than 0.1mm, if exceeding above range, by adjust pad To correct, required until meeting, by 500Nm clamp force square tight whole bolt, finally by 2000Nm-2500Nm Between clamp force square tight whole bolts；

Step 2：Assembling transport flange step, adjusts transport flange, makes the vertical center line of transport flange and end face of machine base And cross central line is close to overlapping, deviation is less than 1mm, the seam gap on measurement vertical stiffeners top, with pad, with every each other The power of the upward 600kN of point acts on the connection pole socket bottom surface of transport flange, is clamped pad, checks again for transport flange and machine The vertical center line and the departure of cross central line of seat end face, otherwise adjust pad thickness and quantity, it is inclined each other until meeting Difference is less than 1mm；

Step 3：Transport flange tools for bolts ' pretension step, first between 600Nm-800Nm clamp force square pretension Whole transport flange bolts, are finally 3300Nm-3500Nm clamp force square, are tight order：First it is transport flange The transport flange bolt of bottom, from middle part successively to both sides tight, followed by be transport flange top transport flange bolt, from Middle part, successively to both sides tight, is finally the transport flange bolt of the left and right sides, answers left and right sides correspondence tight；

Step 4：The screw thread of assembling coupling bar step, coupling bar and long joining section must be cleaned out and apply lubricating oil, and every two Root coupling bar is combined into a coupling bar group with a long joining section, is held up with three typed moving lifting platforms, inserts conveying method Blue coupling bar bore；Adjustment lateral attitude and height, make the axle of the axle center of coupling bar group and the coupling bar bore of transport flange The heart adjusts lengthwise position close to overlapping, and the connection pole socket end face for making coupling bar group vapour end termination stretch steam output end transport flange is 530mm, coupling bar group encourage end termination stretch out encourage end transport flange connection pole socket end face be 480mm；Guiding pin is installed, by drawing The positioning of pilot pin and support assembling concave spherical surface seat；The cooperation sphere of concave spherical surface seat and convex spherical seat is cleaned out, and applies lubricating oil, Assembling convex spherical seat；The thread surface of end nut and coupling bar is cleaned out, and applies lubricating oil, termination spiral shell is screwed with spanner It is female；

Step 5：The preliminary pretension step of coupling bar group, follow these steps to carry out pretension using hydraulic elongator, first with The pulling force stretching coupling bar group of 20t simultaneously locks end nut, reduces the height of typed moving lifting platform, makes coupling bar group and movement Self-powered platform is separated；Coupling bar group is progressively tensed with the increment for increasing 20t pulling force every time and end nut is locked, final locking The pulling force of end nut is 260t, cinching process as used a set of hydraulic elongator if should make the alternately tensions of two groups of coupling bar groups, Two groups of coupling bar groups should be made if as used two sets of hydraulic elongators while being tensed, and keep two groups of pulling force bases of coupling bar group This is identical；

Step 6：Coupling bar group normotopia step, follow these steps to carry out using hydraulic elongator, lifting moving lifting work The height of platform, makes coupling bar group and typed moving lifting platform reliable contacts；Progressively loosened with the pulling force decrement for reducing 20t every time Coupling bar group, finally loosens end nut completely, the process as used a set of hydraulic elongator if should hand over two groups of coupling bar groups For being loosened, as used two sets of hydraulic elongators if should make two groups of coupling bar groups while being loosened, and keep two groups of connections The pulling force of bar group is essentially identical；

Step 7：The formal pretension step of coupling bar group, keeps coupling bar group and typed moving lifting platform reliable contacts；Use Hydraulic elongator is follow these steps to carry out pretension, and coupling bar group and locking end are progressively tensed with the increment for increasing 20t pulling force every time Head nut, the pulling force of final locking end nut is 260t, cinching process as used a set of hydraulic elongator if should make two groups of connection Extension bar group alternately, as used two sets of hydraulic elongators if should make two groups of coupling bar groups while carrying out and keeping two groups of coupling bars The pulling force of group is essentially identical；

Step 8：Support bending subsidence amount preparation of determine step, removes typed moving lifting platform, installs lifting supporting plate, will Amesdial is arranged on lifting supporting plate, makes the lower surface of amesdial contact long joining section, amesdial reading is playbacked and is returned to zero.

Technique effect：Innovative point of the invention is the problem and hidden danger for eliminating previous methods presence, is solved Following key issue：First it is ensure that assembly relation and fitted position accurate, makes that generator unit stator is relative with vehicle to close System is correct, deforms textural association and reaches expected requirement, eliminates the stress distribution of the sliding disturbed belt that fit-up gap causes The influence of change；Coupling bar installation step ensure that the correct assembly relation of coupling bar and spheric washer group, eliminate otic placode root The acquisition of the abnormal primary stress in portion and the correct primary stress of coupling bar；The utilization accurate measurements of bracket are measured to generator The support bending subsidence amount of stator and change and obtain ensure transportation safety real time data；

Due to the implementation of step one, cover plate is correctly assembled with generator unit stator, eliminate fit-up gap, form continuous Upper pressure bang path, it is to avoid close car after compression leg top power cause slide the changing of the relative positions, it is ensured that Stability Analysis of Structures is constant, makes up to go up The compression leg top power of kiloton is transmitted by cover plate, it is to avoid support bore high stress, ensures stand structure safety and transportation safety；

The implementation of step 2 ensure that the correct assembling of transport flange, first be the center line weight for making transport flange and stator Close, this is the correct guarantee for carrying out of conjunction car of postorder, the center line of stator is overlapped with the center line of vehicle, it is to avoid vehicle entirety Centre-of gravity shift；The step also ensure that the relative position between transport flange and generator unit stator is accurately constant, and adjust pad disappears Except the gap between seam between transport flange and generator unit stator, transport flange and generator unit stator relative position are eliminated Slide the hidden danger of the changing of the relative positions, it is to avoid transportation impulsive force causes bearing structure structural relation and distribution of force to change, it is ensured that dress It is accurate with relation and fitted position, make generator unit stator correct with vehicle relativeness, deform textural association and reach expection It is required that, eliminate the influence of the stress distribution change of the sliding disturbed belt that fit-up gap causes, it is ensured that traffic safety；

The implementation of step 3 ensure that by the tight bolt strained equilibrium of whole transport flanges, it is to avoid because transport flange exists Deformation during conjunction is caused the stress of tight bolt is occurred excessive change and is caused a clamp force not enough or too high is caused Dangerous hidden danger；

Coupling bar is disassembled in the implementation guarantee transport of step 4 operation after terminating is easy, it is to avoid wound of screw thread grinding causes dismounting tired It is difficult, it is proposed that feasible operation scheme and requirement, and for subsequent operation is ready；

Step 5, step 6, the cooperation of step 7 make coupling bar group correctly tense, it is ensured that coupling bar group and spheric washer The correct assembly relation of group, it is to avoid clamping stagnation causes transport flange local stress exception, eliminates the abnormal of otic placode root and initially should Power, it is ensured that the acquisition of the correct primary stress of coupling bar；

Step 5 is the preliminary pretension step of coupling bar group, and the step makes coupling bar group reach tensioned state, and the state is basic Have that coupling bar group is out of alignment, natural torsion sinks close to final rigging position state, but during due to the step initial pullup Amount, can cause coupling bar primary stress to reform error, and spheric washer group can also produce frictional resistance, cause in slipping of reforming Stress distribution anomaly, so eliminating above-mentioned influence using following steps；

Step 6 holds up coupling bar group using typed moving lifting platform, the coupling bar group after release pulling force is remained in that most Whole rigging position state, now coupling bar group and transport flange are all in close to final rigging position state and attached in the absence of other Plus stress, the initial calibration that can now carry out the transport monitoring element of coupling bar group and transport flange is answered, and is that follow-up monitoring is carried For correct primary data；

Step 7 is positive under the close final rigging position state that step 6 is provided to tense coupling bar group, due to cinching process The bending subsidence amount of middle coupling bar group does not change substantially, and spheric washer group does not exist in sliding friction drag of reforming yet, and does The factor of disturbing is controlled in acceptable degree, it is ensured that the correctness of assembling structure；

Regulation limitation in step 5, step 6, step 7 operating process to hydraulic elongator operation ensure that two groups of connection The minimum that influences each other of extension bar group, makes deformation of the overall structure under coupling bar group pulled out condition symmetrical, it is to avoid structural stress point Cloth exception；

Step 8 is support bending subsidence amount preparation of determine step, removes typed moving lifting platform, installs measurement supporting plate, will Amesdial is arranged on lifting supporting plate, makes the lower surface of amesdial contact long joining section, amesdial reading is playbacked and is returned to zero, this When due to generator unit stator be to be supported on lower margin position by 4 support square chests, generator unit stator is not subjected to pincers now The moment of flexure that the clamping force of car is caused is pressed from both sides, i.e. the support bending subsidence amount of generator unit stator is zero, and amesdial reading is also adjusted to zero；

Follow-up work beyond step of the present invention, that is, want accurate measurement generator unit stator to be subject to the clamp of schnabel car after closing car Moment of flexure that power is caused and the support bending subsidence amount that produces, previous methods do not solve the problems, such as the measurement, or measurement error is excessive, Measurement error as brought using other object of reference measurement of comparison is difficult to meet detection requirement, and during transport is advanced Also the change of the support bending subsidence amount cannot be monitored, above mentioned problem is caused accurately monitor the stress of stator and becomes shape State, hidden danger is brought to transport；

Due to being arranged on measurement supporting plate present invention employs by amesdial, and measure supporting plate and be arranged in generator unit stator Center portion position, the position is the maximum position of generator unit stator bending subsidence deformation, and generator unit stator is made in the clamping force of schnabel car Into Moment under produce bending subsidence deformation, generator unit stator middle part can produce downward deformation displacement, connection relative to two ends Extension bar group two ends are fixed on the connection pole socket of transport flange, and due to the effect of pretightning force, coupling bar group is constantly in tightens shape Although state, generator unit stator bends and sinks to deforming, but the tensioned state of coupling bar group does not change, coupling bar group Upright position of the upright position all the time with the upright position-i.e. generator unit stator two ends of transport flange is consistent, and is arranged on Amesdial on measurement supporting plate follows the bending subsidence of generator unit stator to deform and moves down, so the reading of amesdial is hair Motor stator closes the bending subsidence deflection after car；If substituting amesdial with position measurement sensor in transportation, Crucial letter can be provided transportation safety condition monitoring with the situation of change of monitor in real time electricity generator stator stand bending subsidence amount Breath；

Coupling bar installation step measurement bracket with making the conjunction car support bending subsidence amount of accurate measurements generator unit stator And the change of transportation monitor in real time electricity generator stator stand bending subsidence amount is there is provided possible, to ensureing that transportation safety is provided Greatly help.

Brief description of the drawings：

Fig. 1 is present invention assembling cover plate step schematic diagram.

Fig. 2 is present invention assembling transport flange step schematic diagram.

Fig. 3 is step 3 schematic diagram.

Fig. 4 is coupling bar connection diagram.

Fig. 5 is coupling bar group schematic diagram in place.

Fig. 6 is nut assembling schematic diagram.

Fig. 7 is the preliminary pretension schematic diagram of coupling bar group

Fig. 8 is support bending subsidence amount preparation of determine step schematic diagram

Specific embodiment：A kind of 1000MW generator unit stators transport interface unit assembly method, and assembling process is by following Step is carried out：

Step one：As shown in figure 1, assembling the step of cover plate 1, cover plate 1 is preliminary in place, makes the uniformly prominent support of cover forward end 2 , conjunction be fixed on out frame cover plate with bolt 4 by the numerical value 0.3-0.5mm of end face 3, is spaced 4 screws a bolt 4, Bolt 4 is clamp force square between 400Nm-500Nm；Welding block 5, after weld seam is cooled to room temperature, checks block and cover plate Between gap 33, if gap 33 is more than 0.01mm, with pad 6, unscrew bolt 4, apply jacking force in cover forward end 2, and examine Cover forward end 2 is looked into, it is desirable to which the numerical value of prominent end face of machine base 3 is in 0.1-0.5mm, and two side errors are less than 0.1mm, if beyond upper Scope is stated, is then corrected by adjust pad 6, required until meeting, by 500Nm clamp force square tight whole bolts 4, most Press afterwards between 2000Nm-2500Nm clamp force square tight whole bolts 4；

Step 2：The assembling step of transport flange 7, as shown in Fig. 2 adjustment transport flange, makes transport flange 7 and end face of machine base Close to overlapping, deviation is less than 1mm to 3 vertical center line 8 and cross central line 9 each other, measures stopping for the top of vertical stiffeners 34 Mouth gap 10, with pad 11, the connection pole socket bottom surface 12 of transport flange is acted on the power of every upward 600kN, makes pad quilt 11 are clamped, the vertical center line 8 and the departure of cross central line 9 of transport flange 7 and end face of machine base 3 is checked again for, otherwise adjusted The thickness of whole pad 11 and quantity, 1mm is less than until meeting deviation each other.

Step 3：The pretension step of transport flange bolt 13, as shown in figure 3, first between 600=Nm-800Nm Clamp force square pretension whole transport flange bolts 13, be finally 3300Nm-3500Nm clamp force square, tight order For：First it is the transport flange bolt 13 of transport flange bottom 14, it is tight to both sides handle successively from middle part, followed by be transport flange The transport flange bolt 13 on top 15, is finally the transport flange bolt 13 of the left and right sides 35 from middle part successively to both sides tight, Left and right sides correspondence is answered tight；

Step 4：The assembling step of coupling bar 16, as shown in figure 4, the screw thread of coupling bar 16 and long joining section 17 must clear up dry Net and apply lubricating oil, every two coupling bars 16 are combined into a coupling bar group 18 with a long joining section 17, as shown in figure 5, with Three typed moving lifting platforms 28 hold up, and insert the coupling bar bore 19 of transport flange 7；Adjustment lateral attitude and height, make connection The axle center of extension bar group 18 is close with the axle center of the coupling bar bore of transport flange to be overlapped, and adjusts lengthwise position, makes coupling bar group 18 The about 530mm of connection pole socket end face 20 of steam output end transport flange is stretched in vapour end termination 19, and coupling bar group 18 is encouraged end termination 21 and stretched out and encourages Hold the about 480mm of connection pole socket end face 22 of transport flange；As shown in fig. 6, install guiding pin 23, by guiding pin 23 positioning with Support assembling concave spherical surface seat 24；The cooperation sphere of concave spherical surface seat 24 and convex spherical seat 25 is cleaned out, and applies lubricating oil, assembled convex Spheric seating 25；The thread surface of end nut 26 and coupling bar 16 is cleaned out, and applies lubricating oil, end nut is screwed with spanner 26；

Step 5：As shown in fig. 7, the preliminary pretension step of coupling bar group 18, using hydraulic elongator 27 follow these steps into Row pretension, stretches coupling bar group 18 and locks end nut 26 with the pulling force of 20t first, reduces the height of typed moving lifting platform 28 Degree, makes coupling bar group 18 be separated with typed moving lifting platform 28；Coupling bar group is progressively tensed with the increment for increasing 20t pulling force every time 18 and end nut 26 is locked, the pulling force of final locking end nut 26 is 260t, and cinching process is as used a set of hydraulic tensioning Device 27 should then be such that two groups of coupling bar groups 18 alternately tense, as used two sets of hydraulic elongators 27 if two groups of coupling bar groups 18 should be made same Shi Jinhang is tensed, and keeps the pulling force of two groups of coupling bar groups 18 essentially identical；

Step 6：The normotopia step of coupling bar group 18, follow these steps to carry out using hydraulic elongator 27, lifts moving lifting The height of workbench 28, makes coupling bar group 18 and the reliable contacts of typed moving lifting platform 28；Successively decreased with the pulling force for reducing 20t every time Amount progressively loosens coupling bar group 18, and end nut 26 is finally loosened completely, and the process should if using a set of hydraulic elongator 27 Two groups of coupling bar groups 18 is alternately loosened, as used two sets of hydraulic elongators 27 if should make two groups of coupling bar groups 18 while entering Row loosens, and keeps the pulling force of two groups of coupling bar groups 18 essentially identical；

Step 7：The formal pretension step of coupling bar group 18, is used for answering for coupling bar group stress monitor in real time in transportation Become piece reading initial calibration step is carried out in this case, keeps coupling bar group 18 and the reliable contacts of typed moving lifting platform 28； It follow these steps to carry out pretension using hydraulic elongator 27, coupling bar group 18 is progressively tensed with the increment for increasing 20t pulling force every time And end nut 26 is locked, the pulling force of final locking end nut 26 is 260t, and cinching process is as used a set of hydraulic elongator 27 should make two groups of coupling bar groups 18 alternately, as used two sets of hydraulic elongators 27 if should make two groups of coupling bar groups 18 simultaneously Carry out and keep the pulling force of two groups of coupling bar groups 18 essentially identical；

Step 8：The bending subsidence amount preparation of determine step of support 29, as shown in figure 8, removing typed moving lifting platform 28, pacifies Dress lifting supporting plate 30, amesdial 31 is arranged on lifting supporting plate 30, amesdial contact 32 is contacted the lower surface of long joining section 17, The reading of amesdial 31 is playbacked and is returned to zero；

Innovative point of the invention is the problem and hidden danger for eliminating previous methods presence, solves following key Problem：First it is ensure that assembly relation and fitted position accurate, makes generator unit stator correct with vehicle relativeness, makes knot Structure combined deformation reaches expected requirement, eliminates the influence of the stress distribution change of the sliding disturbed belt that fit-up gap causes； Coupling bar installation step ensure that the correct assembly relation of coupling bar and spheric washer group, eliminate the abnormal initial of otic placode root The acquisition of the correct primary stress of stress and coupling bar；The support for measuring utilization accurate measurements to the generator unit stator of bracket is curved Bent deflection and change and obtain ensure transportation safety real time data.

Claims (1)

1. a kind of 1000MW generator unit stators transport interface unit assembly method, it is characterized in that：Assembling process follow these steps into OK：

Step one：Assembling cover plate (1) step：Cover plate (1) is preliminary in place, cover forward end (2) is uniformly protruded end face of machine base (3) , conjunction be fixed on out frame cover plate with bolt (4) by 0.3mm-0.5mm, and 4 screws in interval are a tight bolt (4), spiral shell Bolt (4) is clamp force square between 400Nm-500Nm；Welding block (5), after weld seam is cooled to room temperature, checks block with lid Gap (33) between plate, if gap (33) are more than 0.01mm, with pad (6), unscrews bolt (4), is applied in cover forward end (2) Plus jacking force, and checking cover forward end (2), it is desirable to the numerical value of prominent end face of machine base (3) is in 0.1mm-0.5mm, and two side errors Less than 0.1mm, if exceeding above range, corrected by adjust pad (6), required until meeting, by the handle of 500N.m Clamp force square tight whole bolts (4), finally by between 2000Nm-2500Nm clamp force square tight whole bolts (4)；

Step 2：Assembling transport flange (7) step：Adjustment transport flange (7), makes transport flange (7) vertical with end face of machine base (3) To center line (8) and cross central line (9) close to overlapping, deviation is less than 1mm each other, measures stopping for vertical stiffeners (34) top Mouth gap (10), with pad (11), the connection pole socket bottom surface (12) of transport flange is acted on the power of every upward 600kN, is made Pad is clamped (11), checks again for the vertical center line (8) and cross central line (9) of transport flange (7) and end face of machine base (3) Departure, otherwise adjust pad (11) thickness and quantity are less than 1mm until meeting deviation each other；

Step 3：Transport flange bolt (13) pretension step：First between 600Nm-800Nm that clamp force square pretension is complete Portion's transport flange bolt (13), is finally 3300Nm-350Nm clamp force square, is tight order：First it is transport flange The transport flange bolt (13) of bottom (14), from middle part successively to both sides tight, followed by transport flange top (15) transport Flange bolt (13), is finally the transport flange bolt (13) of the left and right sides (35) from middle part successively to both sides tight, should left and right Both sides correspondence is tight；

Step 4：Assembling coupling bar (16) step：The screw thread of coupling bar (16) and long joining section (17) must be cleaned out and apply profit Lubricating oil, every two coupling bars (16) are combined into a coupling bar group (18) with a long joining section (17), with three moving liftings Workbench (28) holds up, the coupling bar bore (19) of insertion transport flange (7)；Adjustment lateral attitude and height, make coupling bar group (18) axle center is close with the axle center of the coupling bar bore of transport flange to be overlapped, and adjusts lengthwise position, makes coupling bar group (18) vapour Connection pole socket end face (20) that steam output end transport flange is stretched at end termination (19) is 530mm, and coupling bar group (18) encourages end termination (21) Stretch out encourage end transport flange connection pole socket end face (22) be 480mm；Guiding pin (23) is installed, by the positioning of guiding pin (23) With support assembling concave spherical surface seat (24)；The cooperation sphere of concave spherical surface seat (24) and convex spherical seat (25) is cleaned out, and applies lubrication Oil, assembling convex spherical seat (25)；The thread surface of end nut (26) and coupling bar (16) is cleaned out, and applies lubricating oil, used Spanner screws end nut (26)；

Step 5：The preliminary pretension step of coupling bar group (18)：It follow these steps to carry out pretension using hydraulic elongator (27), first Coupling bar group (18) is stretched with the pulling force of 20t and end nut (26) is locked, the height of typed moving lifting platform (28) is reduced, made Coupling bar group (18) is separated with typed moving lifting platform (28)；Coupling bar group is progressively tensed with the increment for increasing 20t pulling force every time (18) and end nut (26) is locked, the pulling force for finally locking end nut (26) is 260t, and cinching process is as used a set of liquid Pressure stretcher (27) should then be such that two groups of coupling bar groups (18) alternately tense, as used two sets of hydraulic elongators (27) if should make two groups Coupling bar group (18) is while tensed, and keep the pulling force of two groups of coupling bar groups (18) essentially identical；

Step 6：Coupling bar group (18) normotopia step：It follow these steps to carry out using hydraulic elongator (27), lifts moving lifting The height of workbench (28), makes coupling bar group (18) and typed moving lifting platform (28) reliable contacts；To reduce the drawing of 20t every time Power decrement progressively loosens coupling bar group (18), and end nut (26) is finally loosened completely, and the process is such as drawn using a set of hydraulic pressure Stretching device (27) should then be such that two groups of coupling bar groups (18) alternately loosen, as used two sets of hydraulic elongators (27) if should make two groups Coupling bar group (18) is while loosened, and keep the pulling force of two groups of coupling bar groups (18) essentially identical；

Step 7：The formal pretension step of coupling bar group (18)：Keep coupling bar group (18) reliable with typed moving lifting platform (28) Contact；It follow these steps to carry out pretension using hydraulic elongator (27), connection is progressively tensed with the increment for increasing 20t pulling force every time Bar group (18) simultaneously locks end nut (26), and the pulling force for finally locking end nut (26) is 260t, and cinching process such as uses one Set hydraulic elongator (27) should then make two groups of coupling bar groups (18) alternately, as used two sets of hydraulic elongators (27) if should make Two groups of coupling bar groups (18) are while carrying out and keeping the pulling force of two groups of coupling bar groups (18) essentially identical；

Step 8：Support (29) bending subsidence amount preparation of determine step：Typed moving lifting platform (28) is removed, lifting supporting plate is installed (30), by amesdial (31) in lifting supporting plate (30), amesdial contact (32) is made to contact the lower surface of long joining section (17), Amesdial (31) reading is playbacked and is returned to zero.