CN114320501A

CN114320501A - Disassembly and installation process for steam turbine of chemical power station

Info

Publication number: CN114320501A
Application number: CN202111195604.2A
Authority: CN
Inventors: 刘海涛; 宫玉; 孙占忠
Original assignee: China National Chemical Engineering No14 Construction Co ltd
Current assignee: China National Chemical Engineering No14 Construction Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-14
Publication date: 2022-04-12
Anticipated expiration: 2041-10-14
Also published as: CN114320501B

Abstract

The invention relates to a disassembly and installation process of a steam turbine of a chemical power station, which comprises the processing of a steam turbine body installation base body foundation, the assembly and transportation processing of a bearing seat and a rotor, the processing procedures of generator pre-assembly base body foundation processing, generator assembly correction, preliminary detection debugging after equipment assembly and the like. The method also has higher reference function for the installation projects of the steam turbines of the same type.

Description

Disassembly and installation process for steam turbine of chemical power station

Technical Field

The invention belongs to the technical field of steam turbines, and particularly relates to a disassembly and installation process for a steam turbine of a chemical power station.

Background

Along with the development of science and technology, the performance of the steam turbine is more and more advanced, meanwhile, the structure of the steam turbine is more complex, and the operation environment of the steam turbine is very harsh, so that various faults of the steam turbine are easy to occur, and the steam turbine brings great harm and inconvenience to the industry; the steam turbine is a turbine type machine which converts heat energy into mechanical energy so as to push the carrier to operate or drive the generator to generate electricity; that is, after steam generated by the boiler enters the steam turbine; the heat energy is converted into mechanical energy for the rotation of the turbine rotor through related mechanical configuration and movable blades; due to the operating particularity of the steam turbine, the requirements on the mounting precision, turning, oil circulation and other processes in the disassembly and mounting process are very high; the disassembled installation technology of the steam turbine generator unit of a certain company is described, and reference is provided for other similar engineering construction.

Disclosure of Invention

In order to solve the problems, the invention discloses a disassembly and installation process of a steam turbine of a chemical power station, which simplifies installation operation, ensures construction effectiveness, has definite quality control point control steps and improves assembly work efficiency.

In order to achieve the aim, the invention provides a chemical power station steam turbine disassembly and installation process, which comprises the following steps:

the method comprises the following steps: a base treatment process of a steam turbine body installation base body;

supplementing cement foundation;

limiting the aperture difference;

marking the position of the embedded part according to a drawing;

fourthly, ensuring the cleanness of the holes of the foundation bolts, detecting the condition of the foundation around the embedded part, and coating cement mortar on the surface of the concrete;

fifthly, after the foundation is coated with cement mortar for the second time, loading the foundation bolts with a reinforcing structure to ensure that the foundation bolts have deformation resistance;

step two: a bearing seat and rotor assembly and allocation treatment process;

transporting front and rear bearing supports in place

Secondly, transporting the cylinder in place;

thirdly, primary alignment of the bearing support and the cylinder;

hoisting and transporting the rotor in place;

aligning the rotor and the cylinder;

assembling and adjusting the through flow part;

seventhly, moving the upper cylinder and the lower cylinder, matching with the upper cylinder and the lower cylinder to close the cylinder, wherein the lower cylinder cannot move after being installed;

detecting and repeatedly adjusting the centers of the rotor and the cylinder;

ninthly, performing steam turbine assembly and finishing procedures, and performing secondary grouting on the steam turbine;

step three: the method comprises the following steps of basic processing of a generator pre-assembly substrate and assembly and correction of the generator;

firstly, positioning a generator bedplate;

secondly, the generator is in place and preliminarily corrected;

thirdly, correcting the center of a back wheel of the steam turbine;

fourthly, the backrest wheel corrects the center and completes the connection process;

fifthly, secondary grouting is carried out on the generator;

step four: debugging and primarily detecting after equipment is assembled;

oil circulation flushing;

and connecting external pipelines.

Further, in the first step, the elevation deviation of the surface of the foundation is less than or equal to 10mm, the longitudinal and transverse center lines of the foundation are mutually vertical, and the deviation from the datum line is less than or equal to 1 mm/m; the central deviation of the bolt hole is less than or equal to 5mm, and the verticality of the wall of the bolt holeThe error is less than or equal to 1/1000 and less than or equal to 5 mm; the embedded supporting bottom plate is supplemented, the embedded supporting bottom plate is ensured to be cleaned up in the foundation bolt hole, no sundries exist, the embedded supporting bottom plate is slightly compressed by using the nut, and the mortar begins to be extruded, so that the long-term operation of the unit is facilitated, the slurry leakage during the backfill of the mortar in the foundation bolt hole can be prevented, the foundation bolt hole can be backfilled after 12 hours, and the strength is required after the filling of the mortar for 72 hours>60N/mm²(ii) a After secondary grouting, winding the asphalt adhesive tape on the foundation bolt, wherein the winding range is from the position of the lower end nut to the upper screw tail, if the adhesive tape is thin, multiple layers can be wound, the winding direction is the same as the screwing direction of the nut, and thus when the nut is screwed, the adhesive tape is pushed upwards to form a spherical hoop.

Furthermore, the surface roughness and the flatness deviation of the bottom plate of the supporting bottom plate are less than 0.1;

the sizing block is configured by adopting flat sizing blocks of 160 multiplied by 100 multiplied by 15mm and inclined sizing blocks of 150 multiplied by 90 multiplied by 17/10mm, the matching contact surfaces between the inclined sizing blocks are required to be uniformly contacted, the contact area is not less than 75 percent, the contact surfaces are required to be clean, and a polishing machine is adopted for polishing the sizing blocks;

and taking the longitudinal and transverse center lines of the steam turbine generator unit as a reference, wherein the deviation of the positions of the embedded sizing blocks to the center of the screw hole is not more than 3 mm.

Furthermore, in the second step, the front and rear bearing support positioning process comprises the step of horizontally lifting the support to clean the bottom surface of the support; putting down the bearing support to enable all the adjusting screws to be in contact with the base plate on the foundation;

removing the upper half of the bearing seat, and removing the radial bearing and the thrust bearing;

the center height of the front and rear supports meets the required height through the adjusting screw of the bearing support;

correcting the horizontal of the support, and correcting the axial and transverse horizontal of the support by using an adjusting screw on the premise of keeping the central height unchanged, wherein the deviation is less than 0.06 mm/m;

further, in the second step, the cylinder positioning process includes: the lower half of the cylinder is hung, so that the cat's claw of the cylinder is placed on the bearing support by means of a jacking screw, two pull rods at the front end of the cylinder are firstly detached before the lower cylinder is in place, the two pull rods penetrate into an ear ring of a front bearing seat, and the pull rods are screwed into a lug of the lower cylinder and locked by nuts after the lower cylinder is in place;

leveling a cylinder, adjusting the axial level of the cylinder according to the requirement of the rotor raising degree, placing a level meter between a bearing seat and a cylinder split surface, and jacking a screw by adjusting a spherical washer threaded seat or a lower cat claw below a split surface flange of the bearing seat to ensure that the axial levels of the cylinder and the bearing seat are consistent;

furthermore, the primary alignment process of the bearing support and the cylinder comprises the steps of providing the bearing support and the cylinder; and a steel wire drawing method is adopted for centering in the initial positioning of the bearing seat and the cylinder.

Furthermore, the assembling process of the rotor comprises a steam turbine rotor, a bearing and a bearing seat; cleaning the front and rear bearings and the thrust bearing, and mounting the lower half of the radial bearing into a bearing seat;

the rotor is hoisted into the cylinder by adopting a special tool hoisting beam, the special centering tool is fixed on the rotor, the centering detection can be carried out by clamping the gauge feet and the dial gauge on the fixed joint, and the checking work of the bearing seat and the bearing and the centering of the rotor and the cylinder are alternately carried out; checking a radial bearing; the radial bearings installed in the front and rear bearing blocks are two oil wedge bearings, each bearing consists of two halves, the upper half and the lower half are connected by bolts and prevented from dislocation by taper pins;

checking the clearance between the tile and the shaft neck by adopting a lead pressing method;

when the bearing is assembled, the oil inlet pipe and all oil discharge holes are smooth, and the direction and the position of the lubricating oil inlet of the bearing seat are required to be noticed, so that the lubricating oil inlet is correspondingly registered with the bearing; installing the thrust bearing in a front bearing seat, and cleaning and checking the thrust bearing; the tightening force of a support spring at the lower part of the thrust bearing is adjusted when the upper half bearing bush is taken down, the tightening force is adjusted to ensure that the lower half split surface is strictly kept horizontal, and then a screw is firmly punched;

furthermore, the upper cylinder and the lower cylinder combining process comprises an upper cylinder and a lower cylinder;

when closing the cylinder, hanging the upper cylinder, installing the guide post, and uniformly smearing a layer of sealing coating with the thickness of 0.3-0.5 mm on the middle split surface of the cylinder; when the split surfaces of the upper cylinder and the lower cylinder are about to be closed and the sling is not loosened, the cylinder positioning pin is arranged;

loosening the hoisting rigging and coiling the rotor;

screwing down the split bolt, and then completing cylinder support conversion;

removing the centering tool, removing color codes left on the rotor and the bearing bush during color coating inspection, and installing the bearing, the upper half of the bearing block and the oil seal ring;

the turning mechanism is installed, and the manual turning mechanism can check the functions of the manual turning mechanism through repeated use in the installation process; the hydraulic barring gear checks the axial clearance between the frame and the ratchet wheel, and the rear side clearance is larger than or equal to the rear gland clearance;

installing a connecting piece of a steam turbine and a generator;

spot welding a sizing block, withdrawing the adjusting screw to the position where the end part of the spherical surface is flush with the bottom surface of the support, and removing the adjusting screw sizing block;

removing the cylinder split positioning pin, and spot-welding a front bearing seat pull rod nut according to requirements;

after the position of the steam turbine support is determined without moving, the cement-based grouting material can be adopted for carrying out basic secondary grouting;

the secondary grouting of the steam turbine and the secondary grouting of the driven machine are carried out simultaneously and finished once.

After the secondary grouting is carried out for at least 24 hours, the operation of assembling and disassembling the heavy object on the steam turbine can be carried out.

And after the secondary grouting is carried out for 72 hours, the foundation bolt is screwed according to the final pre-tightening torque, so that the foundation bolt still has enough residual stress after long-term operation to ensure that the foundation bolt is firmly connected with the foundation.

Centering a coupler between the generator and the steam turbine rotor;

adjusting the magnetic force center and the air gap of the generator;

after spot welding of the basic sizing block is finished, the condenser is connected with the exhaust cylinder and welding is finished;

further, the generator assembling process;

the turning mechanism is arranged on the turning mechanism,

installing a connecting piece of a steam turbine and a generator;

the secondary grouting process of the steam turbine and the secondary grouting process of the driven machine are carried out simultaneously and are finished once;

centering a coupler between the generator and the steam turbine rotor; adjusting the magnetic force center and the air gap of the motor; after spot welding of the foundation sizing block is finished, the condenser is connected with the exhaust cylinder and welding is finished; and pipelines, cables, instrument pipelines and the like passing through the secondary grouting layer are laid completely and need to be penetrated into a special sleeve, and are not allowed to be directly buried into concrete.

The invention has the following beneficial effects:

compared with the prior art, the steam turbine installation is carried out by the process technology, the installation process is clear, the quality control point is simple and clear, the construction progress is effectively ensured, the engineering quality is improved, and the construction cost is saved. The method also has higher reference function for the installation projects of the steam turbines of the same type.

Detailed Description

The present invention will be further illustrated below with reference to specific embodiments, which are to be understood as merely illustrative and not limitative of the scope of the present invention.

The invention relates to a disassembly and installation process of a steam turbine of a chemical power station, which comprises the following steps of:

supplementing cement foundation;

limiting the aperture difference;

marking the position of the embedded part according to a drawing;

step two: a bearing seat and rotor assembly and allocation treatment process;

front and rear bearing supports are transported in place

The cylinder is transported to be in place;

primarily calibrating a bearing support and a cylinder;

hoisting and transporting the rotor in place;

aligning a rotor with a cylinder;

assembling and adjusting the through-flow part;

moving the upper and lower cylinders to match the upper and lower cylinders;

detecting and repeatedly adjusting the centers of the rotor and the cylinder;

assembling and ending the steam turbine;

secondary grouting by a steam engine;

firstly, positioning a generator bedplate;

secondly, the generator is in place and preliminarily corrected;

thirdly, correcting the center of a back wheel of the steam turbine;

fifthly, secondary grouting is carried out on the generator;

step four: debugging and primarily detecting after equipment is assembled;

oil circulation flushing;

and connecting external pipelines.

In the first step, the elevation deviation of the surface of the foundation is less than or equal to 10mm, the longitudinal and transverse center lines of the foundation are mutually vertical, and the deviation from the datum line is less than or equal to 1 mm/m; the central deviation of the bolt hole is less than or equal to 5mm, and the verticality error of the wall of the bolt hole is less than or equal to 1/1000 and less than or equal to 5 mm; the embedded supporting bottom plate is supplemented, the clean in the foundation bolt hole is ensured, no sundries are left, and the nut is usedThe embedded supporting bottom plate is slightly compressed to ensure that mortar begins to be extruded, thereby not only being beneficial to the long-term operation of the unit, but also preventing the slurry from leaking when the foundation bolt holes are backfilled with the mortar, the foundation bolt holes can be backfilled after 12 hours, and the strength is required after the mortar is filled for 72 hours>60N/mm²(ii) a After secondary grouting, winding the asphalt adhesive tape on the foundation bolt, wherein the winding range is from the position of the lower end nut to the upper screw tail, if the adhesive tape is thin, multiple layers can be wound, the winding direction is the same as the screwing direction of the nut, and thus when the nut is screwed, the adhesive tape is pushed upwards to form a spherical hoop.

Because the top surface of the supporting bottom plate is required to be horizontal, a layer of cement-based grouting material with the thickness of about 20mm needs to be laid on a foundation, then the supporting bottom plate is embedded into the foundation, the extruded mortar is leveled upwards in an inclined mode, the mortar surface on the periphery of the bottom plate is slightly lower than the top surface of the bottom plate, when the mortar is not solidified, the top surface of the bottom plate is checked to be horizontal in the longitudinal direction and the transverse direction by using a level gauge, and the bottom plate is lightly knocked to enable the level gauge to be in a middle position; the roughness of the upper surface of the bottom plate of the supporting bottom plate is less than 0.1 of flatness deviation;

when the sizing blocks are installed, each pile of sizing blocks generally does not exceed three, 5 sizing blocks are allowed under special conditions, and each pair of inclined sizing blocks is calculated according to 2 sizing blocks; the contact surface of the oblique sizing block and the flat sizing block require 0.05mm clearance gauge inspection; and taking the longitudinal and transverse center lines of the steam turbine generator unit as a reference, wherein the deviation of the positions of the embedded sizing blocks to the center of the screw hole is not more than 3 mm.

In the second step, the front and rear bearing support positioning process comprises horizontally lifting the support, and cleaning the bottom surface of the support; adding a lubricant on the threads of the adjusting screws at the bottom of the support, screwing the adjusting screws out of the bottom surface of the support by 20mm, and putting down the support to enable all the adjusting screws to be in contact with the base plate on the foundation;

removing the upper half of the bearing seat, removing the radial bearing and the thrust bearing, cleaning the bearing seat and performing appearance inspection, wherein the bearing seat is clean and free of casting sand, cracks, rust and impurities; checking the gap between the horizontal joint surfaces of the bearing seat and the bearing cover, and checking that the 0.05mm feeler gauge cannot be plugged in by using the feeler gauge after the bolt is tightened;

the front and rear bearing supports are in accordance with the position specified by the basic center line, meanwhile, the axial distances of the two sides of the front and rear support cat-claw distance screws are equal, and the distances of the two opposite angle cat-claw distance screws are also equal, so that the axial center lines of the front and rear supports are basically aligned; the foundation bolt is inserted, and the nut is screwed by hand;

the center height of the front and rear supports meets the required height through the adjusting screws of the supports;

the foundation bolts are screwed down according to the initial tightening torque in the table 3.1.4-1;

in the second step, the cylinder positioning process comprises the following steps: the lower half of the cylinder is hung, so that the cat's claw of the cylinder is placed on the bearing support by means of a jacking screw, two pull rods at the front end of the cylinder are firstly detached before the lower cylinder is in place, the two pull rods penetrate into an ear ring of a front bearing seat, and the pull rods are screwed into a lug of the lower cylinder and locked by nuts after the lower cylinder is in place;

the eccentric guide post is arranged between the rear part of the cylinder and the rear support, and when the eccentric guide post is assembled, disassembled and re-assembled on site, the original direction is kept as much as possible;

the adjustment of the relative position of the cylinder and the support needs to be conducted alternately with the adjustment of the center height of the cylinder and the horizontal correction, the axial positioning when the lower cylinder is in place takes L as reference, and L refers to the product qualification specification provided by a manufacturer; the adjustment of the L value is carried out by utilizing an eccentric guide post between the cylinder and the rear support, the eccentric direction of the eccentric guide post is firstly known during adjustment, the adjustment effect of the eccentric guide post is related to the eccentric direction when the eccentric pin and the eccentric sleeve are assembled, if the eccentric direction is in the axial direction, the transverse center of the cylinder is mainly adjusted when the sleeve is rotated, and when the eccentric direction is in the transverse direction, the axial position of the cylinder is mainly adjusted;

adjusting the height of the center of the cylinder, adjusting the lower cat's claw jacking screw of the cylinder to make the height of the center of the cylinder consistent with that of the center of the bearing seat, in the adjusting process, considering the requirement of the distance between the center of the cylinder and the top surface of the bearing seat, at this time, after adjusting the distance according to the value on the certificate, hoisting the upper cylinder to make the cat's claw of the upper cylinder supported on the spherical washer, through adjusting the threaded bearing seat under the spherical washer, under the condition that the threaded bearing seat bears the weight and is locked by the locking screw, keeping the distance of the section unchanged, then adjusting the lower cat's claw jacking screw to make the center of the upper and lower cylinders contacted, at this time, because the center of the cylinder is not screwed, the contact condition of the center of the cylinder can only be checked from the front and back and left and right local range, the adjustment amount of the jacking screw of the lower cat's claw can also be monitored by adding a dial indicator, after the position of the lower cylinder is adjusted, the jacking screw is locked, the position of the lower cylinder is kept unchanged during locking, and then the upper cylinder is hung;

leveling a cylinder, adjusting the axial level of the cylinder according to the requirement of the rotor raise degree, placing a level meter between a bearing seat and a cylinder split surface, jacking a screw by adjusting a spherical washer threaded seat or a lower cat claw below a split surface flange of the bearing seat to ensure that the axial levels of the cylinder and the bearing seat are consistent, detecting the transverse level of the cylinder by using a leveling ruler and the level meter, and ensuring that the deviation is less than 0.06 mm/m;

after the cylinder is in place, additionally checking the relative positions of the cylinder and the front and rear bearing seats to confirm that the center distance of the front and rear bearings meets the requirement, and adjusting the position of the bearing seat if necessary; the axial position of the front bearing seat is adjusted by a pull rod nut, and the rear bearing seat is adjusted by two eccentric guide columns of the rear bearing seat; the adjustment of the position of a common bearing seat is mainly to meet the requirements of centering a rotor and a cylinder and axially positioning the rotor.

The bearing support and cylinder primary centering process comprises a bearing support and a cylinder; the method comprises the following steps that a steel wire drawing method is adopted for centering in initial centering of a bearing seat and a cylinder, when the centering is carried out by the steel wire drawing method, a steel plate ruler is used for measuring the positions of a front bearing depression and a rear bearing depression and a steam seal depression, through adjustment, the axial center lines of the front bearing seat and the rear bearing seat and the axial center lines of the front steam seal depression and the rear steam seal depression are basically located in the same vertical plane, and the center deviation is less than 0.5 mm;

the assembling process of the rotor comprises a steam turbine rotor, a bearing and a bearing seat; cleaning the front and rear bearings and the thrust bearing, and mounting the lower half of the radial bearing into a bearing seat;

a special tool hoisting beam is adopted to hoist the rotor into the cylinder, and the rotor journal is cleaned firstly;

a special person should command the rotor in the hoisting process, the axis of the rotor needs to be kept horizontal when the rotor is hoisted, and when the rotor is in place, skilled installers need to hold the rotor at two ends, so that the movable and static parts are prevented from being rubbed; when the shaft neck of the rotor is 150mm away from the bearing bush, pouring clean turbine oil on the bearing bush, after the rotor is supported by a radial bearing, installing a thrust bearing, turning the rotor, and checking whether jamming or rubbing exists; the alignment of the rotor and the cylinder is realized by aligning the rotor with the steam seal hollow nest so that the axis of the rotor is as consistent as possible with the center line of the cylinder;

the end faces of the front gland pit and the rear gland pit of the cylinder are respectively provided with an annular groove, the annular grooves are called as cylinder measuring rings, and when the turbine is assembled in a steam turbine factory, after a center of a rotor and the gland pits is well found, the measurement is also carried out at the measuring rings and well recorded; r4 and R4 in the turbine product qualification certificate are finding median values of front and rear steam seal hollow cavities, and R3 and R3 are measurement results of front and rear measurement rings;

fixing a centering special tool on the rotor, clamping the gauge feet and the dial gauge on the fixed joint to perform centering detection, wherein each measuring position is provided with 6 measuring points; in the turbine product qualification certificate, R3, R3, R4 and R4 are measured values after upper and lower cylinders are combined, in the field installation process, when a rotor and a cylinder are centered, the cylinder is only the lower half, so each measuring position only has 3 measuring points, at the moment, the measurement is carried out at three measuring points of a steam seal cavity at the front and the back of the cylinder, if the deviation between the center of the rotor and the center of the cylinder is less than 0.05mm and the center of the rotor is lower than the center of the cylinder, the subsequent work can be carried out, if the center of the rotor and the center of the cylinder are out of tolerance, the on-site condition needs to be adjusted, or the cylinder or a bearing seat is adjusted, the center is hung into the upper cylinder after meeting the requirement, at the moment, the cylinder is still supported by a lower cat claw jacking screw, a positioning pin is matched, split face bolts in the cylinder are screwed at intervals, then the cylinder support conversion is carried out, and the lower cat claw jacking screw is loosened under the condition that the upper cat claw is cushioned by a spherical washer; when the cylinder supports and converts, monitoring at the steam seal hollow nest by using a dial indicator, if the center of the cylinder moves downwards after conversion, adjusting the threaded support to restore the reading of the dial indicator to the original indicating value and locking the threaded support, then measuring at the steam seal hollow nest positions in front of and behind the cylinder, measuring and recording at the measuring ring position of the cylinder under the condition that the center of the rotor and the center of the cylinder meet requirements, taking the measuring and recording as the reference of a later re-correction center, then hanging the upper cylinder, before loosening a middle split bolt, enabling a jacking screw to jack the lower cat claw, and taking the screwing moment as the degree that the reading of the dial indicator just begins to change;

checking the bearing seat and the bearing and centering and inserting the rotor and the cylinder; checking a radial bearing; the radial bearing installed in the front and rear bearing blocks is a two-oil-wedge bearing, the bearing consists of two halves, the upper half and the lower half are connected by bolts and prevented from dislocation by taper pins, and a positioning pin is specially matched for preventing the bearing body from moving in the axial direction and the circumferential direction; the inner side of the bearing body is provided with a tin-based bearing alloy layer, and the thickness of the tin-based bearing alloy layer is 2mm at most; the size of the oil wedge is guaranteed by processing, and manual scraping is not needed; carefully checking whether the contact surface of the bearing alloy has defects of cracks, sand holes and the like, checking whether the tile tire is unshelled, and marking each part of the bearing to prevent the bearing from being reversely installed;

the upper tile and the lower tile are matched without a staggered opening phenomenon, and the middle split surface is plugged by a 0.05mm clearance gauge under the condition of not fastening a bolt; the spherical surface of the bearing bush and the spherical seat have to be well contacted, the area reaches more than 75 percent and the spherical surface and the spherical seat are uniformly distributed; the contact between the bearing pad block and the hollow nest thereof is compact, the contact surface is more than 70%, the local gap is 0.05mm, the depth of the clearance gauge is less than or equal to 10mm, and the adjusting gasket in the pad block is made of stainless steel sheets and is not allowed to exceed three sheets;

when the bearing is assembled, the oil inlet pipe and all oil discharge holes are smooth, and the direction and the position of the lubricating oil inlet of the bearing seat are required to be noticed, so that the lubricating oil inlet is correspondingly registered with the bearing;

the thrust bearings are arranged in the front bearing seat, the bearings belong to Kimberly thrust bearings, and each thrust bearing comprises a positive thrust bearing and a secondary thrust bearing; each group of bearings comprises a base ring, a thrust pad, an upper adjusting block, a lower adjusting block and the like; the base ring is horizontally split, the upper half and the lower half are connected by bolts and are positioned by taper pins, and the base ring and the bearing block are circumferentially positioned by anti-rotation pins; each group of 8 thrust pads are uniformly distributed along the circumferential direction, the working surface of the pads is cast with the tin-based babbit alloy, the back surface is embedded with the supporting block, the pads are positioned by the inner ring of the base ring in the radial direction and are positioned by the screws of the pads in the circumferential direction, and the thrust pads, the adjusting block and the base ring are in spherical contact with each other, so that the thrust pads have multi-directional freedom, and simultaneously, the structure ensures that each pad can bear load uniformly; the upper part and the lower part are circumferentially positioned by cylindrical pins;

when the thrust bearing is installed at the position in the bearing seat, the thickness of the adjusting gasket is configured to ensure that the axial clearance between the opening of the rotor thrust disc and the thrust bearing meets the requirement by configuring the thickness of the spacer ring between the two base rings, and the spacer ring and the base rings are circumferentially positioned by using the bolt; the thrust pads adopt an eccentric supporting structure, and the supporting positions of the thrust pads are offset relative to the center in the circumferential direction, so that the bearing capacity is improved in appointed steering, but the bearing capacity is obviously reduced in reverse rotation, and due to the fact that attention must be paid to assembly, ten million of millions of thrust pads cannot adjust the two groups of the front thrust pads and the secondary thrust pads in a wrong way;

cleaning and checking the thrust bearing, numbering the thrust pads one by one, measuring the thickness difference of the thrust pads to be not more than 0.02mm, recording, pressing the thrust disc to the pads when formal assembly is required, and correcting according to the impression condition; the contact area of each thrust pad is more than 75% and is uniformly distributed, and after the adjustment is finished, the thickness of each thrust pad is measured and recorded;

the tightening force of a support spring at the lower part of the thrust bearing is adjusted when the upper half bearing bush is taken down, the tightening force is adjusted to ensure that the lower half split surface is strictly kept horizontal, and then a screw is firmly punched;

when the axial clearance of the thrust pad is measured, the upper half thrust pad, the lower half thrust pad, the positioning ring and the upper half pad sleeve and the lower half pad sleeve are required to be installed, the steam turbine rotor is pushed against in a reciprocating mode, the displacement value of the rotor and the displacement value of the thrust bearing are measured, the difference between the two displacement values is used as the clearance value of the thrust pad, the thrust bearing is monitored by a dial indicator, no obvious axial displacement exists, and otherwise, fixed retesting is required.

The upper cylinder and the lower cylinder combining process comprises an upper cylinder and a lower cylinder;

when closing the cylinder, hanging the upper cylinder, installing the guide post, and uniformly smearing a layer of sealing coating with the thickness of 0.3-0.5 mm on the middle split surface of the cylinder;

lifting the upper cylinder according to a specified lifting position, wherein the horizontal plane of the upper cylinder is kept horizontal when the upper cylinder is lifted, the upper cylinder is checked at any time when falling, the phenomena of uneven falling and clamping cannot occur, and the upper cylinder and the lower cylinder are arranged into a cylinder positioning pin when the split surfaces are about to be closed and a sling is not released;

loosening the lifting rigging, turning the rotor, and paying attention to no friction sound in the listening cylinder;

the middle split bolt is screwed, and in the installation process of the steam turbine, when the middle split bolt is screwed after the upper cylinder and the lower cylinder are combined, in order to avoid the deformation of a middle split flange and prevent the steam leakage of the middle split, the screwing torque meets the technical file requirements provided by a manufacturer;

the method comprises the following steps that a cylinder support is switched, the overall structure of the steam turbine determines that the cylinder support form is an upper cat claw support, when the steam turbine is installed, the cylinder is temporarily supported by a lower cat claw before cylinder closing and in the cylinder closing process, a split bolt in the cylinder is screwed as required, the split bolt needs to be switched to a cylinder supported by the upper cat claw, when the support is switched, a spherical gasket is tightly attached to the upper cat claw, after a threaded support is locked by a locking screw according to a specified moment, a feeler gauge is used for checking a contact surface of the spherical gasket and the upper cat claw, a 0.03mm feeler gauge sheet is not plugged, then the lower cat claw jacking screw is loosened, and the lower cat claw jacking screw is locked after the lower cat claw jack screw is withdrawn by 3-5 mm;

after the cylinder support is switched, the center of the rotor and the cylinder can be changed, and after the threaded support bears the load, the thread clearance causes the center of the cylinder to move downwards; the axial level of the front bearing seat changes from low front to high back, and the rear bearing seat changes from high front to low back; after the cylinder support is converted, the center of the rotor and the cylinder needs to be re-corrected, and if the center deviation is more than +/-0.03 mm, the center needs to be adjusted again;

(1) removing the centering tool, removing color codes left on the rotor and the bearing bush during color coating inspection, and installing the bearing, the upper half of the bearing block and the oil seal ring;

(2) the turning mechanism is installed, and the manual turning mechanism can check the functions of the manual turning mechanism through repeated use in the installation process; the hydraulic barring gear checks the axial clearance between the frame and the ratchet wheel, and the rear side clearance is larger than or equal to the rear gland clearance;

(3) installing a connecting piece of a steam turbine and a generator;

(4) spot welding a sizing block, withdrawing the adjusting screw to the position where the end part of the spherical surface is flush with the bottom surface of the support, and removing the adjusting screw sizing block;

(5) removing the cylinder split positioning pin, and spot-welding a front bearing seat pull rod nut according to requirements;

Centering a coupler between the generator and the steam turbine rotor;

adjusting the magnetic force center and the air gap of the generator;

and pipelines, cables, instrument pipelines and the like which penetrate through the secondary grouting layer are laid, and the pipelines, the cables, the instrument pipelines and the like are penetrated in a special sleeve and are not allowed to be directly buried in concrete.

The machine set equipment, in particular to the insulation board of the generator rear bearing seat, the sliding surface of the bedplate, the electrical equipment at the lower part of the generator and the like, should be properly protected to prevent the secondary irrigation from being polluted and wetted;

the rough surface of the foundation concrete, which is in contact with the secondary pouring layer, must be cleaned by blowing, and has no impurities, paint and oil stains. The concrete surface should be soaked for more than 24 hours;

the surface of the bedplate, which is in contact with the secondary pouring layer, is cleaned and is free of paint and oil stain;

the interior of the foundation bolt hole is cleaned and has no impurities; the foundation bolt base plate and the foundation concrete are in good contact, so that slurry leakage is avoided when the concrete is poured;

the secondary pouring part does not obstruct the thermal expansion of the steam turbine and the pipeline and does not block an oil filling hole or a drain hole and the like of the bedplate;

the nut of the foundation bolt exposed outside is additionally provided with a sleeve as much as possible, and a gap enough for sleeving a wrench is reserved around the nut;

the foundation secondary irrigation is required to be uniformly commanded and is responsible for comprehensive inspection and matching affairs of civil engineering and installation, and the steam turbine installation constructors are required to perform inspection in a matching way;

the cement used for the secondary pouring concrete is preferably grouting material;

the interior of the bedplate is filled with solids, and the periphery of the bedplate is filled with hands, so that the irrigation height is ensured;

the secondary irrigation work under each bedplate is continuously carried out without interruption;

when the foundation is irrigated for the second time, the steam turbine and the generator can be irrigated for the first time;

when pouring, concrete test blocks are made according to the specification, the concrete test blocks and the secondary pouring layer are maintained under the same condition, strength tests are made according to the required time, and reports are provided;

after the pouring is finished, the mortar splashed to the surfaces of the equipment and the bolts is wiped clean immediately and maintained according to requirements, and the equipment is not affected with damp during pouring;

before the concrete strength of the basic secondary pouring layer does not reach 70% of the design strength, the heavy parts are not allowed to be assembled and disassembled on the unit and the impact work is not allowed to be carried out, and before the concrete strength of the basic secondary pouring layer does not reach 80% of the design strength, the foundation bolts are not allowed to be retightened and the unit is not started;

the construction process of the foundation secondary pouring concrete should be strictly controlled, and after the form removal at the end of maintenance, the appearance and the quality should meet the design requirements and be commonly witnessed by related personnel.

The generator assembly process;

(1) and (4) dismounting the centering tool, clearing color codes left on the rotor and the bearing bush during color coating inspection, and installing the bearing, the upper half of the bearing block and the oil seal ring.

(3) installing a connecting piece of a steam turbine and a generator;

the secondary grouting of the steam turbine and the secondary grouting of the driven machine are carried out simultaneously and finished once;

after the secondary grouting is carried out for at least 24 hours, the operation of assembling and disassembling weights on a steam turbine can be carried out;

after the secondary grouting is carried out for 72 hours, the foundation bolt is screwed according to the final pre-tightening torque, so that the foundation bolt still has enough residual stress after long-term operation to ensure the firm connection with the foundation;

Debugging the equipment after assembly; the machine set equipment, in particular to the insulation board of the generator rear bearing seat, the sliding surface of the bedplate, the electrical equipment at the lower part of the generator and the like, should be properly protected to prevent the secondary irrigation from being polluted and wetted;

the surface of the board, which is in contact with the secondary pouring layer, is cleaned and is free of paint and oil stain;

the secondary pouring part does not obstruct the thermal expansion of the steam turbine and the pipeline and does not block an oil filling hole or a drainage hole of the bedplate;

the foundation secondary concrete pouring and maintenance work of the steam turbine generator unit is carried out according to the relevant technical specifications of electric power construction and acceptance and meets the following requirements:

the construction process of the secondary pouring of the concrete on the foundation is strictly controlled, after the form removal at the end of maintenance, the appearance and the quality meet the design requirements and are commonly witnessed by related personnel;

welding the inlet and outlet steam pipes to ensure the levelness of the flange of the connecting port and the cleanliness in the pipe, carrying out acid cleaning treatment on the pipe section, after the pipe section is connected with a cylinder, rechecking the level of the cylinder, the raise degree of a rotor and the clearance of a bedplate, recording, and adjusting if the deviation is overlarge;

the drainage hole, the instrument socket, the joint and the blocking plate at the cylinder body part are correctly and completely installed without leakage;

the fixed heat-insulating layer framework is firmly laid, the diameter of a heat-insulating hook drill hole is not more than 8mm, the depth is not more than 10mm, and the distance between the heat-insulating hooks is about 300 mm;

the flatness of the makeup board is not uneven, the layering of the makeup board is flat and straight, no overlapping and opening are caused, and screws are complete and firm;

whether the surface of the concrete is flat or not is checked, and the phenomena of cracks, holes, honeycombs, pitted surfaces, exposed ribs and the like exist;

checking whether the reserved holes of the foundation are consistent with the design or not, and measuring the elevation of the foundation, the distance of the central line of the bolt hole and the verticality;

drawing the position of the basic sizing block and the center line and elevation of the air cooler according to the sizing block layout and the air cooler layout;

leveling the concrete of the bearing surface of the foundation, uniformly distributing the concrete with a contact condition of more than or equal to 65% when the color of the flat plate is checked, and ensuring that the bearing surface of the flat plate is contacted compactly without tilting;

the contact between the sizing block and each combined surface of the bedplate is uniformly distributed by more than 65 percent, and the clearance gauge with the thickness of 0.05mm is checked; the staggered part of the inclined sizing block should not exceed 25 percent of the area of the sizing block;

each group of sizing blocks is generally not allowed to exceed three, and one side is not allowed to bear force;

and determining the thickness of the flat iron pad according to the thickness of the bedplate, the size of the inclined iron pad and the basic elevation, and manufacturing and processing the flat iron pad. The flatness of the ground flat iron pad is within 0.02mm, and the surface roughness is ^ 5;

the bedplate is smooth and flat and has no burrs; after the device is in place, the elevation of the top surface is adapted to the steam generation center, and the error is not more than +/-5 mm;

the upper cushion block of the foundation bolt is smooth and is tightly contacted with concrete, so that uneven force is prevented; when the anchor bolt is installed, the bolt is in a vertical state, the allowable deviation is L/200(L is the length of the anchor bolt), and the allowable deviation is less than or equal to 5 mm;

the generator is dragged and transported to the hoisting hole in advance, and after being placed in place, the generator is really well cushioned and stably adjusted;

the steel wire rope is bound on a special lifting lug appointed by a generator manufacturer, and other parts on the shell of the generator cannot be selected to bind the steel wire rope to lift the stator;

the generator should be kept horizontal during hoisting and monitoring of the crane and building structure. After the generator leaves the ground, the hook can be lifted after the running brake is tested for 1-2 times. The hook-lifting speed needs to be slowly, evenly and evenly balanced. Stopping rising after the lowest point of the generator exceeds the platform, moving the cart, and placing the generator on the bedplate;

primarily aligning the generator by using a level meter;

the relative positions of the two flanges of the coupling are aligned according to marks of a manufacturer, if no mark exists, the offset values of the two flanges are complemented, and the bolts are aligned with each other so as to reduce the processing amount of reaming holes, and the marks are marked to be used as the basis for aligning and connecting the centers and the coupling finally;

each measurement should be carried out after the two couplings respectively rotate in the same direction by 900 or 1800, the measuring point positions of the two half couplings should be aligned and unchanged and the disc moving angles should be consistent when the rotor is moved and the measurement is carried out each time; the measurement of the end surface deflection is carried out at two corresponding points with 180 degrees of radius equal each time, so as to eliminate the error caused by the rotor play;

enough gaps are reserved among the oil gear, the steam seal and the rotor to ensure that the rotor is placed in the oil gear and is not pressed on the oil gear;

when measurement is carried out, rigid connection is not allowed between the two rotors, and the two rotors are in free states respectively;

the centering tool of the coupling has enough rigidity, and the mounting must be firm and reliable; when the dial indicator is used for centering the coupler, the indicator frame is firmly installed, so that the impact is avoided, and the measurement accuracy is ensured; after the coupling disc moves for a circle and returns to the original position, the reading of the dial indicator in the circumferential direction can return to the original numerical value;

when the end surface clearance is measured, the clearance inserted into the clearance every time is not more than four clearance gauges;

the oil retaining depression and the lift of the journal of the steam turbine rotor are kept within a specified range while the coupler is centered, the bedplate has no clearance, and the space between the sizing blocks and the bedplate and between the sizing blocks and the sizing blocks are checked by using 0.05mm feelers;

when the center of the coupler is in conflict with the raise degree of the rotor, the center of the coupler is used as a reference;

secondary irrigation of the generator is completed at one time;

oil circulation flushing program:

firstly, flushing an oil pipeline between a main oil tank and a maintenance oil tank until the oil pipeline is clean;

independently flushing the lubricating oil main pipe and the main pipelines of the inlet and the outlet of the main oil pump until the main pipelines are clean;

a temporary pipe is additionally arranged at the oil bearing port to short-circuit the bearing bush, so that oil does not enter the contact surface of the tungsten metal and the shaft neck;

when flushing, the high-pressure oil pump and the low-pressure oil pump can alternately operate for flushing. The temperature of the flushing oil is preferably changed alternately, the high temperature is about 75 ℃ generally but not more than 80 ℃, the low temperature is below 30 ℃, the high temperature and the low temperature are kept for 1-2 h respectively, and the time of changing the temperature alternately is about 1 h; the oil temperature heating can adopt electric heating or be connected with a temporary heating steam pipe; cooling the oil by using cooling water of an oil cooler; the filter screens of an oil tank and an oil filter are required to be checked and cleaned regularly in the oil circulation process; and after the self-inspection is qualified, the circulating oil is taken to an inspection mechanism for inspection, and the circulating oil can be put into use after being qualified.

The technical means disclosed by the scheme of the invention are not limited to the technical means disclosed by the above embodiment, but also comprise the technical scheme consisting of any combination of the above technical features; it should be noted that the above-mentioned contents only illustrate the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and it is obvious to those skilled in the art that several modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations fall within the protection scope of the claims of the present invention.

Claims

1. A disassembly and installation process of a steam turbine of a chemical power station is characterized in that; the method comprises the following steps:

supplementing cement foundation;

limiting the aperture difference;

marking the position of the embedded part according to a drawing;

step two: a bearing seat and rotor assembly and allocation treatment process;

transporting front and rear bearing supports in place

Secondly, transporting the cylinder in place;

thirdly, primary alignment of the bearing support and the cylinder;

hoisting and transporting the rotor in place;

aligning the rotor and the cylinder;

assembling and adjusting the through flow part;

seventhly, moving the upper cylinder and the lower cylinder to match with the upper cylinder and the lower cylinder to close the cylinder;

detecting and repeatedly adjusting the centers of the rotor and the cylinder;

sixthly, transporting the cylinder and the front and rear bearing seats in place;

seventhly, cleaning the cylinder body, the rotor and the inner cylinder;

installing an inner lower cylinder: hoisting the inner and lower cylinders by a travelling crane and leveling and aligning;

ninthly, hoisting the rotor in place and measuring the clearance: a traveling crane is used for hanging the rotor, measuring the jumping value of the rotor at the position where the rotor is not located, and then detecting the jumping, the ladle deflection and the initial centering of the half coupling; after adjusting the data such as the measured bearing clearance, the oil seal gear clearance, the measuring ring and the like, sticking adhesive tapes and retesting;

hoisting the thrust bearing at the wave front and measuring the rotor jumping value: hoisting the thrust tile by a travelling crane and leveling and aligning;

and (3) gap measurement: measuring, adjusting and recording the concentricity of the rotor and the lower cylinder; measuring, adjusting and recording the rotor, the gas seal and the through-flow gap; measuring, adjusting and recording the gap between the inner upper cylinder and the outer upper cylinder;

air seal installation: hoisting the air seal by a travelling crane and aligning;

internal part installation: installing through-flow parts after cleaning the cylinder, and spot-welding the split bolts such as the inner cylinder, the holding ring and the like;

buckling a cylinder: after the installation inspection is finished and the data is normal, hoisting the buckling cylinder, installing data such as a stud nut, an electric heating stud, a retest measuring ring and the like, and adjusting if necessary;

hot compacting: tightly fastening an outer cylinder bolt, fastening a lower cylinder slideway, fixing a cat claw bolt, resetting a front bearing box and a rear bearing box and adjusting a gap;

oil pipe installation: installing a lubricating oil pipeline of the machine body, fastening a bolt, checking the tightness and avoiding oil leakage;

installing a quick-closing valve: hoisting quick-closing valveThe lower U-shaped pipe is used for carrying out reinstallation and debugging on the electric instrument element at the same time;

centering a coupler: centering and aligning the generator and the steam turbine, simultaneously resetting an oil pipe at the position, resetting a rear bearing box after the oil pipe is qualified, and checking whether lubricating oil is qualified or not;

connecting pipelines: before connection, an operation scaffold needs to be erected, a steam inlet and outlet pipeline is installed, and meanwhile, the change of the centering value is monitored by a coupler meter; after the installation is finished, joint inspection and acceptance are required, and the scaffold is dismantled after the acceptance is finished;

assembling and ending the steam turbine; secondary grouting by a steam engine;

firstly, positioning a generator bedplate;

secondly, the generator is in place and preliminarily corrected;

thirdly, correcting the center of a back wheel of the steam turbine;

fifthly, secondary grouting is carried out on the generator;

sixthly, the step four: debugging and primarily detecting after equipment is assembled;

seventhly, circularly flushing oil;

eighthly, electrical test and debugging work;

ninthly, flushing and grid connection of the gas turbine: before the steam turbine is flushed, the temporary steam turbine is subjected to heat preservation, and turning is carried out after the combined inspection and test reach the flushing requirement, and the air engine is flushed to work after the steam turbine meets the flushing condition; heat preservation of the steam turbine: and after the impact rotation is successful, removing the temporary heat-insulating layer, and performing formal heat insulation strictly according to the heat-insulating instruction of the steam turbine.

2. The chemical power station steam turbine disassembly and assembly process as claimed in claim 1, wherein the process comprises the following steps: in the first step, the elevation deviation of the surface of the foundation is less than or equal to 10mm, the longitudinal and transverse center lines of the foundation are mutually vertical, and the deviation from the datum line is less than or equal to 1 mm/m; the central deviation of the bolt hole is less than or equal to 5mm, and the verticality error of the wall of the bolt hole is less than or equal to 1/1000 and less than or equal to 5 mm; the embedded supporting bottom plate is supplemented, the embedded supporting bottom plate is ensured to be cleaned up in the foundation bolt hole, no sundries exist, the embedded supporting bottom plate is slightly compressed by using the nut, and the mortar begins to be extruded, so that the long-term operation of the unit is facilitated, the slurry leakage during the backfill of the mortar in the foundation bolt hole can be prevented, the foundation bolt hole can be backfilled after 12 hours, and the strength is required after the filling of the mortar for 72 hours>60N/mm²(ii) a After secondary grouting, winding the asphalt adhesive tape on the foundation bolt, wherein the winding range is from the position of the lower end nut to the upper screw tail, if the adhesive tape is thin, multiple layers can be wound, the winding direction is the same as the screwing direction of the nut, and thus when the nut is screwed, the adhesive tape is pushed upwards to form a spherical hoop.

3. The chemical power station steam turbine disassembly and assembly process as claimed in claim 2, wherein: the upper surface roughness and the flatness deviation of the bottom plate of the supporting bottom plate are less than 0.1;

4. The chemical power station steam turbine disassembly and assembly process as claimed in claim 1, wherein the process comprises the following steps: in the second step, the front and rear bearing support positioning process comprises horizontally lifting the support, and cleaning the bottom surface of the support; putting down the bearing support to enable all the adjusting screws to be in contact with the base plate on the foundation;

and (3) correcting the horizontal of the support, and correcting the axial and transverse horizontal of the support by using an adjusting screw on the premise of keeping the central height unchanged, wherein the deviation is less than 0.06 mm/m.

5. The chemical power station steam turbine disassembly and assembly process as claimed in claim 1, wherein the process comprises the following steps: in the second step, the cylinder positioning process comprises the following steps: the lower half of the cylinder is hung, so that the cat's claw of the cylinder is placed on the bearing support by means of a jacking screw, two pull rods at the front end of the cylinder are firstly detached before the lower cylinder is in place, the two pull rods penetrate into an ear ring of a front bearing seat, and the pull rods are screwed into a lug of the lower cylinder and locked by nuts after the lower cylinder is in place;

the cylinder is leveled, the axial level of the cylinder is adjusted according to the requirement of the rotor raising degree, the level meter is placed between the bearing seat and the cylinder split surface, and the axial level of the cylinder and the bearing seat is consistent by adjusting the spherical washer thread seat or the lower cat claw jacking screw below the split surface flange of the bearing seat.

6. The chemical power station steam turbine disassembly and assembly process as claimed in claim 1, wherein the process comprises the following steps: the bearing support and cylinder primary centering process comprises a bearing support and a cylinder; and a steel wire drawing method is adopted for centering in the initial positioning of the bearing seat and the cylinder.

7. The chemical power station steam turbine disassembly and assembly process as claimed in claim 1, wherein the process comprises the following steps: the assembling process of the rotor comprises a steam turbine rotor, a bearing and a bearing seat; cleaning the front and rear bearings and the thrust bearing, and mounting the lower half of the radial bearing into a bearing seat;

when the bearing is assembled, the oil inlet pipe and all oil discharge holes are smooth, and the direction and the position of the lubricating oil inlet of the bearing seat are required to be noticed, so that the lubricating oil inlet is correspondingly registered with the bearing; installing the thrust bearing in a front bearing seat, and cleaning and checking the thrust bearing; the tightening force of the support spring at the lower part of the thrust bearing is adjusted when the upper half bearing bush is taken down, and the tightening force is adjusted to ensure that the lower half split surface is strictly kept horizontal, and then the screw is firmly punched.

8. The chemical power station steam turbine disassembly and assembly process as claimed in claim 1, wherein the process comprises the following steps: the upper cylinder and the lower cylinder combining process comprises an upper cylinder and a lower cylinder;

when the cylinder is closed, the upper cylinder is hung, the guide post is installed, a layer of sealing coating with the thickness of 0.3-0.5 mm is uniformly coated on the middle split surface of the cylinder, and the coating has temperature resistance and bears the temperature of more than 550 ℃; when the split surfaces of the upper cylinder and the lower cylinder are about to be closed and the sling is not loosened, the cylinder positioning pin is arranged;

loosening the hoisting rigging and coiling the rotor;

screwing down the split bolt, and then completing cylinder support conversion;

installing a connecting piece of a steam turbine and a generator;

centering a coupler between the generator and the steam turbine rotor;

adjusting the magnetic force center and the air gap of the generator;

and after spot welding of the basic sizing block is finished, connecting the condenser with the exhaust cylinder and finishing welding.

9. The chemical power station steam turbine disassembly and assembly process as claimed in claim 1, wherein the process comprises the following steps: the generator assembly process;

the turning mechanism is arranged on the turning mechanism,

installing a connecting piece of a steam turbine and a generator;

the secondary grouting process of the steam turbine and the secondary grouting process of the driven machine are carried out simultaneously and are finished once; centering a coupler between the generator and the steam turbine rotor; adjusting the magnetic force center and the air gap of the motor; after spot welding of the foundation sizing block is finished, the condenser is connected with the exhaust cylinder and welding is finished; and pipelines, cables, instrument pipelines and the like passing through the secondary grouting layer are laid completely and need to be penetrated into a special sleeve, and are not allowed to be directly buried into concrete.