CN111441379A - Installation and construction method of coupling variable-frequency generator - Google Patents
Installation and construction method of coupling variable-frequency generator Download PDFInfo
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- CN111441379A CN111441379A CN202010256752.XA CN202010256752A CN111441379A CN 111441379 A CN111441379 A CN 111441379A CN 202010256752 A CN202010256752 A CN 202010256752A CN 111441379 A CN111441379 A CN 111441379A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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Abstract
The invention discloses a coupling variable frequency generator installation and construction method, which comprises the following steps: s1: checking and accepting a pump pit foundation of minus 5 meters; s2: the condenser is in place; s3: 7.5 m basic platform acceptance; s4: arranging a sizing block bedplate; s5: the equipment is in place, leveled and aligned; s6: primary grouting; s7, centering the coupler; s8: secondary grouting; s9: trial running of equipment; s10: the coupling is connected in the following sequence: the coupling of the steam turbine and the steam pump → the coupling of the auxiliary gear box and the main and auxiliary motors → the coupling of the main gear box and the auxiliary gear box → the coupling of the main gear box and the variable frequency generator → the coupling of the steam turbine and the main gear box. The invention reasonably arranges the construction procedures of construction and installation aiming at the characteristics of the construction procedures of construction and installation, the whole construction is very compact, and the working safety is ensured.
Description
Technical Field
The invention relates to a construction method, in particular to a coupling variable frequency generator installation construction method.
Background
With scientific development, ultra-clean energy and new energy power generation become trends of power development, the driving of a feed pump and a turbine coupled variable frequency generator to generate power is an important measure for a power plant to adopt a new energy-saving technology, the working mode of the driving of the feed pump and the turbine coupled variable frequency generator to generate power is an innovative technology that one end of the turbine drives a steam feed pump to provide working media for a boiler, and the other end drives the variable frequency generator to generate power through a speed reducer.
The invention content is as follows:
the technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the installation and construction method of the coupling variable frequency generator is provided, which can reasonably arrange building and installation and construction processes, and ensure the working safety.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a coupling variable frequency generator installation construction method comprises the following steps:
s1: checking and accepting a negative 5m pump pit foundation: the transverse and longitudinal center lines and the embedded parts are mainly checked, and the embedded parts are welded with a guide device of a condenser, so that the deviation of the embedded parts is less than or equal to 3 mm;
s2: the condenser is in place: after the negative 5m pump pit foundation is accepted, arranging a steam turbine condenser in the negative 5.5 m pump pit and in the foundation platform frame; the steam turbine condenser is integrally supplied with materials, the size is large, the tonnage is heavy, the steam turbine condenser is arranged at minus 5.5 meters and located in a foundation platform frame, building construction procedures are optimized and adjusted aiming at the characteristic that the steam turbine foundation cannot be in place after construction is completed, cross construction points are reasonably determined, cross construction safety technical control measures are adopted, after the foundation frame is completed, the 7.5-meter steam turbine foundation platform is subjected to construction temporarily, condenser hoisting holes are reserved, the steam turbine is hoisted in place, and construction of the steam turbine foundation platform is carried out after the steam turbine is hoisted in place.
S3: 7.5 m basic platform acceptance: after the condenser is hoisted in place, construction of a 7.5-meter foundation platform of the steam turbine is carried out, after the construction is finished, acceptance of the 7.5-meter foundation platform is carried out, the platform is a cement frame, the total length of the foundation is 25 meters, the total length of equipment is 23 meters, and the platform is a parallel three-axis system, so that when the foundation is accepted, the transverse and longitudinal center lines and the embedded anchor bolt holes need to be accurate;
s4: arranging a sizing block platen: carrying out sizing block arrangement after 7.5 m foundation acceptance, carrying out sizing block arrangement by adopting a novel spring type pre-embedded sizing block construction method (patent number: 201810617258.4), carrying out sizing block arrangement by adopting 24 cement cushion blocks of a steam-driven water-feeding pump, 18 groups of adjusting bolts of a water-feeding pump steam turbine, 60 cement cushion blocks of a variable-frequency generator, 18 cement cushion blocks of a main gear box and an auxiliary gear box, and counting 120 cement cushion blocks, firstly placing a plurality of proper springs below each group of sizing blocks, then placing a bedplate in place, adopting temporary support to adjust the elevation and the level of the bedplate to meet requirements, simultaneously automatically eliminating the gap between the sizing blocks and the clearance between the sizing blocks and the bedplate by utilizing the elasticity of the springs, then grouting, removing a template and clearing a slurry leakage part during grouting after the curing period is over, and carrying out formal placing of equipment;
the novel spring pre-embedding sizing block method comprises the steps of firstly placing a plurality of appropriate springs below each group of sizing blocks, then placing a table plate in place, adopting temporary support to adjust the elevation and the level of the table plate to meet requirements, simultaneously utilizing the elasticity of the springs to automatically eliminate the 'sizing blocks and the gaps between the sizing blocks and the table plate', then grouting, removing a template and clearing a grout leaking part during grouting after the maintenance period expires, and finally placing equipment in place formally. The novel spring embedded sizing block method construction finished product sample drawing can completely meet the requirement of installation of modern large-scale precision equipment, has the advantages of simple construction method, perfectly guaranteed construction quality, accelerated construction progress, reduced construction cost and environmental protection, and simultaneously the process enables the sizing block to be closely contacted and uniformly stressed, thereby effectively avoiding the problem that the unit vibrates due to sizing block platen installation.
S5: equipment in-place leveling and alignment: leveling equipment by adopting a high-precision digital level gauge with the precision of 0.02mm and the height error of a bedplate within 0.05 mm; before the equipment is in place, firstly aligning and positioning a bedplate and a base of the equipment, utilizing a steel wire aligning frame combined tool to perform steel wire drawing alignment by using a datum line of a steam turbine, and roughly adjusting the center of the equipment in place by using the steam turbine as a standard; the equipment is in place, a crane hook and a special shoulder pole are used for hoisting a steam turbine module, and a crane is used for directly hoisting a variable frequency generator stator, a main reduction gearbox, an auxiliary reduction gearbox and a water feeding pump generator stator in place;
leveling by equipment: the standard of the equipment is that a steam turbine is used as the standard, the elevation and the level of the steam turbine are firstly adjusted to be qualified, and then the positioning and the alignment of other equipment are carried out. For more accurate adjustment, a high-precision digital level gauge is adopted, the precision reaches 0.02mm, the height error of the bedplate is controlled within 0.05mm, the mounting precision of the steam turbine is effectively improved, the workload of later-stage adjustment of equipment is reduced, the construction period is shortened, and the mounting precision of a unit is improved.
Equipment alignment: the multi-shaft parallel three-shaft combined tool has the advantages that the multi-shaft combined tool is multiple in unit equipment, long in shaft system, 23 meters in total length of the equipment and parallel three shaft systems, alignment in the installation process of each equipment is realized, the precision required by measurement work is higher, the general requirement is not more than 1mm, therefore, deviation is easy to occur during basic acceptance and equipment alignment, the precision of the tool is very high, before the equipment is in place, the bedplate and the base of the equipment are aligned and positioned, the steel wire is pulled for alignment by using a datum line of a steam turbine, and after the equipment is in place, the rough adjustment center is also aligned by using the steam turbine. The application of the steel wire aligning frame combined tool improves the installation quality and precision of the steam turbine and quickens the construction progress of the equipment centering work.
S6: primary grouting: the drive steam turbine is used as a reference, the drive steam turbine alignment and grouting work is firstly completed, then other equipment is aligned one by one, one alignment is completed, one foundation bolt hole is correspondingly completed through one-time grouting, and the equipment grouting procedure is performed one by one according to the alignment sequence.
S7, centering the coupler: after the foundation bolt hole is once grouted and the strength reaches the design requirement, the foundation bolt is fastened, a multifunctional centering support (201910747334.8) is adopted in sequence, the coupler centering work is carried out by means of a dial indicator, the center of each equipment coupler meets the technical requirement of a manufacturing plant, and the generator bearing bush inspection and the generator rotor penetrating are carried out before centering.
S8: secondary grouting: the purpose of equipment secondary grouting is that cement pouring is completely carried out under the bottom plate of the equipment, the equipment is tightly attached to a concrete foundation, the equipment secondary grouting is finished by primary grouting, foundation bolts are fastened to a specified torque, all equipment couplers are found to be qualified and accepted, under the condition, the equipment is subjected to secondary grouting pouring, and grouting material bubbles are removed by adopting a multifunctional tipping bucket unloader (201822058430.5) before the primary grouting and the secondary grouting.
S9: equipment trial run: trial rotation is carried out on a water feeding pump steam turbine before a boiler blow pipe, after the pickling work of a water feeding pipeline is finished, a coupler between the water feeding pump steam turbine and a steam pump is connected, after the boiler blow pipe is finished, an auxiliary motor trial rotation is carried out, then a coupler between an auxiliary motor and an auxiliary gear box is connected, and after the auxiliary motor drives the auxiliary gear box to trial rotate normally, a main gear box coupler, an auxiliary gear box coupler and a coupler between a main gear box and a variable frequency generator are connected;
s10: connecting the two wheels: the auxiliary motor drives the frequency conversion generator to operate, the trial rotation is normal and the test is done and just can be connected with the last shaft coupling namely feed pump steam turbine and main gear box shaft coupling, the order of shaft coupling connection is: the coupling of the steam turbine and the steam pump → the coupling of the auxiliary gear box and the main and auxiliary motors → the coupling of the main gear box and the auxiliary gear box → the coupling of the main gear box and the variable frequency generator → the coupling of the steam turbine and the main gear box.
At S4, the equipment includes a steam feed pump, a feed pump turbine, a main gearbox, an auxiliary gearbox, a variable frequency generator, a motor, a condenser, a main tank, ancillary equipment, and a system.
In S6, the turbine alignment is to adjust the whole level and elevation of the turbine by adjusting the nut embedded in the drive turbine base, and the turbine alignment is completed.
In S6, the grouting procedure of the equipment is that after the steam turbine shaft diameter raise and the bearing mid-plane elevation meet the technical requirements of a manufacturing plant, primary grouting can be performed on foundation bolts of the steam turbine, after the maintenance reaches more than 80% of the design strength, the primary centering of a water supply pump, a main speed reducer and a steam turbine coupler is performed by taking the steam turbine as a reference, and after the center of the coupler meets the technical requirements of the manufacturing plant, primary grouting is performed on the foundation bolts of the water supply pump and the main speed reducer; after the curing period reaches more than 80% of the design strength, primarily centering the main speed reducer and the variable-frequency generator and the main speed reducer and the auxiliary speed reducer by taking the main speed reducer as a reference, and performing primary grouting on foundation bolts of the variable-frequency generator and the auxiliary speed reducer after the center of the coupler meets the technical requirements of a manufacturing factory; after vice speed reducer rag bolt grout maintenance reaches design intensity more than 80%, use vice speed reducer as the reference object, carry out the preliminary center of seeking of motor and vice speed reducer shaft coupling, after the shaft coupling center accords with the manufacturer technical requirement, carry out grout once to motor rag bolt, and should be with the inside chisel hair of rag bolt hole before the equipment fixing to can better atress behind the messenger rag bolt grout.
In S7, the sequence of centering using the multifunctional centering bracket is: 1) centering a steam turbine and a steam pump; 2) centering a steam turbine and a main gearbox; 3) centering the main gearbox and the variable-frequency generator; 4) centering the main gear box and the auxiliary gear box; 5) the auxiliary gear box is centered with the main and auxiliary motors.
In S7, when the multifunctional centering support is used for centering, the multifunctional centering support is fixed on a hub, and then a dial indicator is arranged on a shaft shoulder to carry out radial deviation measurement; measuring the axial clearance by using two dial indicators which are 180 degrees at intervals, rotating the dial indicators for 360 degrees, recording the axial clearance once when each dial rotates for 90 degrees, reading the difference values of the upper part, the lower part, the left part and the right part, namely the central deviation value and the mouth opening value, taking the reading calculation result of the radial indicator as the central deviation value, taking the reading calculation result of the axial indicator as the mouth opening value, and recording; after data measurement, the center of the coupler is adjusted as required, and the gasket of the equipment is adjusted or the equipment is moved left and right according to the technical requirement of the center of a manufacturer until the data of the center and the excircle meet the technical requirement of the manufacturer.
In S9, before the operation of the equipment, the oil system equipment, the oil pipeline, the steam guide pipe, the main steam and the governor valve are installed, and after the main steam and the governor valve are installed, the blowpipe and the gate are restored, and the small pipes are installed for the pipes of phi 89 and below by using the small pipe fixed-amount pulley pipe bender (patent No. 201720640684.0).
The steam pipe and the oil pipe below phi 89 are not provided with drawings, the field construction environment is complex and the like, the BIM technology is applied to guide the design and construction of the small pipeline, technicians are trained in the construction process, the implementation scheme is discussed, the design is compared through a plurality of schemes, the construction scheme is preferred, all system pipelines are simulated, collision and rework in the construction process are avoided, the construction period is shortened on the premise of considering the attractive process, the efficiency is improved, and the cost is saved.
To tubule ration pulley hickey, after deciding the angle, fool's operation, it is very convenient to use, and the suitability is stronger, simple structure, and safe small and exquisite conveniently carries, has better practicality and economic benefits, and through specialized tool's use, the tubule way is arranged rationally neat, and the technology is very pleasing to the eye.
After an oil pipeline is installed, oil flushing is carried out, the oil flushing is divided into 4 stages, the 1 st stage is circulation in an oil tank, the 2 nd stage is that before lubricating oil enters a bearing box, short circuit circulation is carried out on an advancing oil return pipe and an oil return pipe of the bearing box, the 3 rd stage is that the lubricating oil enters the bearing box for circulation, and the 4 th stage is that the lubricating oil enters a control oil pipeline for circulation flushing; the pipeline is formally recovered after being washed, and the turning and cleaning inspection is carried out;
before oil flushing, a large-scale oil system particle collecting device (patent number: 201721336200. X) is used for recovering particles in oil, the specific operation is that a pipeline for filtering oil is connected through one end of a steel wire hose during oil filtering, the other end of the steel wire hose is connected with an inlet end of the collecting device, a collecting cage is placed into an oil return pipe or a bearing box for short-circuit circulation, oil circulation flushing is greatly facilitated, compared with traditional oil flushing, the quantity of particles in the pipeline of the oil system is effectively reduced, the efficiency is improved, the oil filtering time is shortened, and finally the aim of oil system cleaning construction is achieved.
The middle position of the pipeline is connected with a particle collecting device, which is equivalent to 2 oil filtering points, and particles in the oil are captured 2 times in one cycle.
In the construction method, civil engineering construction and mechanical construction are performed alternately, civil engineering construction with the length of minus 5 meters is required before acceptance of a pump pit foundation with the length of minus 5 meters, civil engineering construction with a platform of 7.5 meters is required after a condenser is in place, civil engineering construction with a platform of 15.5 meters is required before primary grouting, small mechanical platform construction is required before secondary grouting, and civil engineering construction with a cover plate of 15.5 meters is required after secondary grouting.
The civil engineering construction and the engineering construction are crossed very much, 2 times of foundation acceptance work are carried out, the first time is the acceptance of a-5-meter pump pit foundation, the condenser and the condensate pump are in place, and the second time is the acceptance of a 7.5-meter foundation platform; checking and accepting a foundation of 5 meters, and mainly checking horizontal and longitudinal center lines and embedded parts, wherein the embedded parts are welded with a guide device of a condenser, so that the deviation of the embedded parts is less than or equal to 3 mm; 7.5 meters are inspected, the total length of a cement frame foundation is 25 meters, the total length of equipment is 23 meters, and the cement frame foundation is parallel three shafting systems, so that when the cement frame foundation is inspected, transverse and longitudinal center lines and embedded anchor bolt holes are accurate, otherwise, the equipment can be positioned in place and adjusted greatly.
One end of the water feeding pump turbine drives the water feeding pump turbine, the other end of the water feeding pump turbine drives the variable frequency generator through the reduction gearbox, the full load of the unit is 50MW, the rotating speed is 4800 rpm, the unit vibration index is excellent, and the installation quality is 100% excellent through the unit operation inspection.
The invention has the following positive beneficial effects:
1. aiming at the characteristics of construction and installation procedures, the construction and installation procedures are reasonably arranged, the whole construction is very compact, and the working safety is guaranteed; the traditional construction method is improved greatly, a new method and a new process are created, and the installation progress and the installation quality are obviously improved; a new tool is researched and developed, so that the construction efficiency and the construction process are improved; by adopting the latest BIM technology, a large amount of labor and material cost is saved, and the construction process is attractive and elegant.
2. The spring type pre-embedded iron padding method disclosed by the invention overturns the traditional method, has the advantages of no dust pollution, green construction, one less construction link than the traditional construction process, and capability of improving the installation quality by one step and bringing the construction period forward by more than 30 days.
3. The research and development of the small pipe quantitative pulley pipe bender tool can realize semi-automation, and the small pipe quantitative pulley pipe bender tool can be directly made into a finished product by only one angle, so that the line production is realized, the installation efficiency is greatly improved, the construction period is shortened, and the construction cost is reduced.
4. The development of the multifunctional tipping bucket unloader is a matched grouting tool specially aiming at high-strength grouting material, bubble overflow of the grouting material is the key of grouting quality, low-speed electric drill stirring is replaced by vibration, manpower is replaced by machinery, grouting requirements can be met by 2-3 people operating, and traditional man-sea battles are avoided.
5. The multifunctional centering support realizes that one support is universal for all power plant auxiliary machine couplers, has very strong universality, avoids the problem that a tool needs to be manufactured when one coupler is centered in the traditional construction, avoids waste, is very convenient to carry, and is a necessary tool for installation and maintenance of auxiliary machines.
6. The invention utilizes the large-scale oil system particle collecting device to recover particles in oil, the key point of the early oil filtering work is to remove large-scale impurities, the large-scale impurities are required to be washed into an oil return filter screen of an oil tank by oil or broken by an oil filter, the large-scale oil system particle collecting device collects the impurities in the oil in the middle of an oil pipeline, the efficiency is improved by one time compared with the traditional oil circulation efficiency, the large-scale oil system particle collecting device is convenient to clean the filter screen, like the filter screen of a soybean milk machine, the filter screen can be opened for cleaning once being twisted, and has a self-locking function, the filter screen can not fall in the oil, compared with the traditional oil washing, the invention effectively reduces the number of particles in the oil system pipeline, improves the efficiency, shortens the oil filtering time and finally achieves the aim of clean construction of the oil system.
Drawings
FIG. 1 is a schematic flow chart of a construction method for installing a coupled variable frequency generator according to the present invention.
Detailed Description
The invention will be further explained and explained with reference to the accompanying drawing 1 and the specific embodiments:
example (b): a coupling variable frequency generator installation construction method comprises the following steps:
s1: checking and accepting a negative 5m pump pit foundation: the transverse and longitudinal center lines and the embedded parts are mainly checked, and the embedded parts are welded with a guide device of a condenser, so that the deviation of the embedded parts is less than or equal to 3 mm;
s2: the condenser is in place: after the negative 5m pump pit foundation is accepted, arranging a steam turbine condenser in the negative 5.5 m pump pit and in the foundation platform frame; the steam turbine condenser is integrally supplied with materials, the size is large, the tonnage is heavy, the steam turbine condenser is arranged at minus 5.5 meters and located in a foundation platform frame, building construction procedures are optimized and adjusted aiming at the characteristic that the steam turbine foundation cannot be in place after construction is completed, cross construction points are reasonably determined, cross construction safety technical control measures are adopted, after the foundation frame is completed, the 7.5-meter steam turbine foundation platform is subjected to construction temporarily, condenser hoisting holes are reserved, the steam turbine is hoisted in place, and construction of the steam turbine foundation platform is carried out after the steam turbine is hoisted in place.
S3: 7.5 m basic platform acceptance: after the condenser is hoisted in place, construction of a 7.5-meter foundation platform of the steam turbine is carried out, after the construction is finished, acceptance of the 7.5-meter foundation platform is carried out, the platform is a cement frame, the total length of the foundation is 25 meters, the total length of equipment is 23 meters, and the platform is a parallel three-axis system, so that when the foundation is accepted, the transverse and longitudinal center lines and the embedded anchor bolt holes need to be accurate;
s4: arranging a sizing block platen: carrying out sizing block arrangement after 7.5 m foundation acceptance, carrying out sizing block arrangement by adopting a novel spring type pre-embedded sizing block construction method (patent number: 201810617258.4), carrying out sizing block arrangement by adopting 24 cement cushion blocks of a steam-driven water-feeding pump, 18 groups of adjusting bolts of a water-feeding pump steam turbine, 60 cement cushion blocks of a variable-frequency generator, 18 cement cushion blocks of a main gear box and an auxiliary gear box, and counting 120 cement cushion blocks, firstly placing a plurality of proper springs below each group of sizing blocks, then placing a bedplate in place, adopting temporary support to adjust the elevation and the level of the bedplate to meet requirements, simultaneously automatically eliminating the gap between the sizing blocks and the clearance between the sizing blocks and the bedplate by utilizing the elasticity of the springs, then grouting, removing a template and clearing a slurry leakage part during grouting after the curing period is over, and carrying out formal placing of equipment;
the novel spring pre-embedding sizing block method comprises the steps of firstly placing a plurality of appropriate springs below each group of sizing blocks, then placing a table plate in place, adopting temporary support to adjust the elevation and the level of the table plate to meet requirements, simultaneously utilizing the elasticity of the springs to automatically eliminate the 'sizing blocks and the gaps between the sizing blocks and the table plate', then grouting, removing a template and clearing a grout leaking part during grouting after the maintenance period expires, and finally placing equipment in place formally. The novel spring embedded sizing block method construction finished product sample drawing can completely meet the requirement of installation of modern large-scale precision equipment, has the advantages of simple construction method, perfectly guaranteed construction quality, accelerated construction progress, reduced construction cost and environmental protection, and simultaneously the process enables the sizing block to be closely contacted and uniformly stressed, thereby effectively avoiding the problem that the unit vibrates due to sizing block platen installation.
S5: equipment in-place leveling and alignment: leveling equipment by adopting a high-precision digital level gauge with the precision of 0.02mm and the height error of a bedplate within 0.05 mm; before the equipment is in place, firstly aligning and positioning a bedplate and a base of the equipment, utilizing a steel wire aligning frame combined tool to perform steel wire drawing alignment by using a datum line of a steam turbine, and roughly adjusting the center of the equipment in place by using the steam turbine as a standard; the equipment is in place, a crane hook and a special shoulder pole are used for hoisting a steam turbine module, and a crane is used for directly hoisting a variable frequency generator stator, a main reduction gearbox, an auxiliary reduction gearbox and a water feeding pump generator stator in place;
leveling by equipment: the standard of the equipment is that a steam turbine is used as the standard, the elevation and the level of the steam turbine are firstly adjusted to be qualified, and then the positioning and the alignment of other equipment are carried out. For more accurate adjustment, a high-precision digital level gauge is adopted, the precision reaches 0.02mm, the height error of the bedplate is controlled within 0.05mm, the mounting precision of the steam turbine is effectively improved, the workload of later-stage adjustment of equipment is reduced, the construction period is shortened, and the mounting precision of a unit is improved.
Equipment alignment: the multi-shaft parallel three-shaft combined tool has the advantages that the multi-shaft combined tool is multiple in unit equipment, long in shaft system, 23 meters in total length of the equipment and parallel three shaft systems, alignment in the installation process of each equipment is realized, the precision required by measurement work is higher, the general requirement is not more than 1mm, therefore, deviation is easy to occur during basic acceptance and equipment alignment, the precision of the tool is very high, before the equipment is in place, the bedplate and the base of the equipment are aligned and positioned, the steel wire is pulled for alignment by using a datum line of a steam turbine, and after the equipment is in place, the rough adjustment center is also aligned by using the steam turbine. The application of the steel wire aligning frame combined tool improves the installation quality and precision of the steam turbine and quickens the construction progress of the equipment centering work.
S6: primary grouting: the drive steam turbine is used as a reference, the drive steam turbine alignment and grouting work is firstly completed, then other equipment is aligned one by one, one alignment is completed, one foundation bolt hole is correspondingly completed through one-time grouting, and the equipment grouting procedure is performed one by one according to the alignment sequence.
S7, centering the coupler: after the foundation bolt hole is once grouted and the strength reaches the design requirement, the foundation bolt is fastened, a multifunctional centering support (201910747334.8) is adopted in sequence, the coupler centering work is carried out by means of a dial indicator, the center of each equipment coupler meets the technical requirement of a manufacturing plant, and the generator bearing bush inspection and the generator rotor penetrating are carried out before centering.
S8: secondary grouting: the purpose of equipment secondary grouting is that cement pouring is completely carried out under the bottom plate of the equipment, the equipment is tightly attached to a concrete foundation, the equipment secondary grouting is finished by primary grouting, foundation bolts are fastened to a specified torque, all equipment couplers are found to be qualified and accepted, under the condition, the equipment is subjected to secondary grouting pouring, and grouting material bubbles are removed by adopting a multifunctional tipping bucket unloader (201822058430.5) before the primary grouting and the secondary grouting.
S9: equipment trial run: trial rotation is carried out on a water feeding pump steam turbine before a boiler blow pipe, after the pickling work of a water feeding pipeline is finished, a coupler between the water feeding pump steam turbine and a steam pump is connected, after the boiler blow pipe is finished, an auxiliary motor trial rotation is carried out, then a coupler between an auxiliary motor and an auxiliary gear box is connected, and after the auxiliary motor drives the auxiliary gear box to trial rotate normally, a main gear box coupler, an auxiliary gear box coupler and a coupler between a main gear box and a variable frequency generator are connected;
s10: connecting the two wheels: the auxiliary motor drives the frequency conversion generator to operate, the trial rotation is normal and the test is done and just can be connected with the last shaft coupling namely feed pump steam turbine and main gear box shaft coupling, the order of shaft coupling connection is: the coupling of the steam turbine and the steam pump → the coupling of the auxiliary gear box and the main and auxiliary motors → the coupling of the main gear box and the auxiliary gear box → the coupling of the main gear box and the variable frequency generator → the coupling of the steam turbine and the main gear box.
At S4, the equipment includes a steam feed pump, a feed pump turbine, a main gearbox, an auxiliary gearbox, a variable frequency generator, a motor, a condenser, a main tank, ancillary equipment, and a system.
In S6, the turbine alignment is to adjust the whole level and elevation of the turbine by adjusting the nut embedded in the drive turbine base, and the turbine alignment is completed.
In S6, the grouting procedure of the equipment is that after the steam turbine shaft diameter raise and the bearing mid-plane elevation meet the technical requirements of a manufacturing plant, primary grouting can be performed on foundation bolts of the steam turbine, after the maintenance reaches more than 80% of the design strength, the primary centering of a water supply pump, a main speed reducer and a steam turbine coupler is performed by taking the steam turbine as a reference, and after the center of the coupler meets the technical requirements of the manufacturing plant, primary grouting is performed on the foundation bolts of the water supply pump and the main speed reducer; after the curing period reaches more than 80% of the design strength, primarily centering the main speed reducer and the variable-frequency generator and the main speed reducer and the auxiliary speed reducer by taking the main speed reducer as a reference, and performing primary grouting on foundation bolts of the variable-frequency generator and the auxiliary speed reducer after the center of the coupler meets the technical requirements of a manufacturing factory; after vice speed reducer rag bolt grout maintenance reaches design intensity more than 80%, use vice speed reducer as the reference object, carry out the preliminary center of seeking of motor and vice speed reducer shaft coupling, after the shaft coupling center accords with the manufacturer technical requirement, carry out grout once to motor rag bolt, and should be with the inside chisel hair of rag bolt hole before the equipment fixing to can better atress behind the messenger rag bolt grout.
In S7, the sequence of centering using the multifunctional centering bracket is: 1) centering a steam turbine and a steam pump; 2) centering a steam turbine and a main gearbox; 3) centering the main gearbox and the variable-frequency generator; 4) centering the main gear box and the auxiliary gear box; 5) the auxiliary gear box is centered with the main and auxiliary motors.
In S7, when the multifunctional centering support is used for centering, the multifunctional centering support is fixed on a hub, and then a dial indicator is arranged on a shaft shoulder to carry out radial deviation measurement; measuring the axial clearance by using two dial indicators which are 180 degrees at intervals, rotating the dial indicators for 360 degrees, recording the axial clearance once when each dial rotates for 90 degrees, reading the difference values of the upper part, the lower part, the left part and the right part, namely the central deviation value and the mouth opening value, taking the reading calculation result of the radial indicator as the central deviation value, taking the reading calculation result of the axial indicator as the mouth opening value, and recording; after data measurement, the center of the coupler is adjusted as required, and the gasket of the equipment is adjusted or the equipment is moved left and right according to the technical requirement of the center of a manufacturer until the data of the center and the excircle meet the technical requirement of the manufacturer.
In S9, before the operation of the equipment, the oil system equipment, the oil pipeline, the steam guide pipe, the main steam and the governor valve are installed, and after the main steam and the governor valve are installed, the blowpipe and the gate are restored, and the small pipes are installed for the pipes of phi 89 and below by using the small pipe fixed-amount pulley pipe bender (patent No. 201720640684.0).
The steam pipe and the oil pipe below phi 89 are not provided with drawings, the field construction environment is complex and the like, the BIM technology is applied to guide the design and construction of the small pipeline, technicians are trained in the construction process, the implementation scheme is discussed, the design is compared through a plurality of schemes, the construction scheme is preferred, all system pipelines are simulated, collision and rework in the construction process are avoided, the construction period is shortened on the premise of considering the attractive process, the efficiency is improved, and the cost is saved.
To tubule ration pulley hickey, after deciding the angle, fool's operation, it is very convenient to use, and the suitability is stronger, simple structure, and safe small and exquisite conveniently carries, has better practicality and economic benefits, and through specialized tool's use, the tubule way is arranged rationally neat, and the technology is very pleasing to the eye.
After an oil pipeline is installed, oil flushing is carried out, the oil flushing is divided into 4 stages, the 1 st stage is circulation in an oil tank, the 2 nd stage is that before lubricating oil enters a bearing box, short circuit circulation is carried out on an advancing oil return pipe and an oil return pipe of the bearing box, the 3 rd stage is that the lubricating oil enters the bearing box for circulation, and the 4 th stage is that the lubricating oil enters a control oil pipeline for circulation flushing; the pipeline is formally recovered after being washed, and the turning and cleaning inspection is carried out;
before oil flushing, a large-scale oil system particle collecting device (patent number: 201721336200. X) is used for recovering particles in oil, the specific operation is that a pipeline for filtering oil is connected through one end of a steel wire hose during oil filtering, the other end of the steel wire hose is connected with an inlet end of the collecting device, a collecting cage is placed into an oil return pipe or a bearing box for short-circuit circulation, oil circulation flushing is greatly facilitated, compared with traditional oil flushing, the quantity of particles in the pipeline of the oil system is effectively reduced, the efficiency is improved, the oil filtering time is shortened, and finally the aim of oil system cleaning construction is achieved.
The middle position of the pipeline is connected with a particle collecting device, which is equivalent to 2 oil filtering points, and particles in the oil are captured 2 times in one cycle.
In the construction method, civil engineering construction and mechanical construction are performed alternately, civil engineering construction with the length of minus 5 meters is required before acceptance of a pump pit foundation with the length of minus 5 meters, civil engineering construction with a platform of 7.5 meters is required after a condenser is in place, civil engineering construction with a platform of 15.5 meters is required before primary grouting, small mechanical platform construction is required before secondary grouting, and civil engineering construction with a cover plate of 15.5 meters is required after secondary grouting.
The civil engineering construction and the engineering construction are crossed very much, 2 times of foundation acceptance work are carried out, the first time is the acceptance of a-5-meter pump pit foundation, the condenser and the condensate pump are in place, and the second time is the acceptance of a 7.5-meter foundation platform; checking and accepting a foundation of 5 meters, and mainly checking horizontal and longitudinal center lines and embedded parts, wherein the embedded parts are welded with a guide device of a condenser, so that the deviation of the embedded parts is less than or equal to 3 mm; 7.5 meters are inspected, the total length of a cement frame foundation is 25 meters, the total length of equipment is 23 meters, and the cement frame foundation is parallel three shafting systems, so that when the cement frame foundation is inspected, transverse and longitudinal center lines and embedded anchor bolt holes are accurate, otherwise, the equipment can be positioned in place and adjusted greatly.
One end of the water feeding pump turbine drives the water feeding pump turbine, the other end of the water feeding pump turbine drives the variable frequency generator through the reduction gearbox, the full load of the unit is 50MW, the rotating speed is 4800 rpm, the unit vibration index is excellent, and the installation quality is 100% excellent through the unit operation inspection.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A coupling variable frequency generator installation construction method comprises the following steps:
s1: checking and accepting a negative 5m pump pit foundation: the transverse and longitudinal center lines and the embedded parts are mainly checked, and the embedded parts are welded with a guide device of a condenser, so that the deviation of the embedded parts is less than or equal to 3 mm;
s2: the condenser is in place: after the negative 5m pump pit foundation is accepted, arranging a steam turbine condenser in the negative 5.5 m pump pit and in the foundation platform frame;
s3: 7.5 m basic platform acceptance: after the condenser is hoisted in place, construction of a 7.5-meter foundation platform of the steam turbine is carried out, after the construction is finished, acceptance of the 7.5-meter foundation platform is carried out, the platform is a cement frame, the total length of the foundation is 25 meters, the total length of equipment is 23 meters, and the platform is a parallel three-axis system, so that when the foundation is accepted, the transverse and longitudinal center lines and the embedded anchor bolt holes need to be accurate;
s4: arranging a sizing block platen: arranging sizing blocks after 7.5 m base acceptance, arranging the sizing blocks by adopting a novel spring type pre-embedded sizing block construction method, firstly placing a plurality of proper springs below each group of sizing blocks, then placing a bedplate in place, adopting temporary support to adjust the elevation and the level of the bedplate to meet requirements, simultaneously automatically eliminating the gap between the sizing blocks and the gap between the sizing blocks and the bedplate by utilizing the elasticity of the springs, then grouting, removing a template and cleaning a slurry leakage part during grouting after the curing period is over, and then formally placing equipment;
s5: equipment in-place leveling and alignment: leveling equipment by adopting a high-precision digital level gauge with the precision of 0.02mm and the height error of a bedplate within 0.05 mm; before the equipment is in place, firstly aligning and positioning a bedplate and a base of the equipment, utilizing a steel wire aligning frame combined tool to perform steel wire drawing alignment by using a datum line of a steam turbine, and roughly adjusting the center of the equipment in place by using the steam turbine as a standard; the equipment is in place, a crane hook and a special shoulder pole are used for hoisting a steam turbine module, and a crane is used for directly hoisting a variable frequency generator stator, a main reduction gearbox, an auxiliary reduction gearbox and a water feeding pump generator stator in place;
s6: primary grouting: the method comprises the following steps of firstly finishing alignment and grouting work of a driving steam turbine by taking the driving steam turbine as a reference, then aligning other equipment one by one, completing alignment, completing one grouting for a foundation bolt hole, and completing one grouting for one time correspondingly, wherein grouting procedures of the equipment are carried out one by one according to an alignment sequence;
s7, centering the coupler: after the foundation bolt hole is subjected to primary grouting and the strength reaches the design requirement, fastening the foundation bolt, sequentially adopting a multifunctional centering support, and performing centering work on a coupler by means of a dial indicator, so that the center of each equipment coupler meets the technical requirement of a manufacturing plant, and performing generator bearing bush inspection and generator rotor penetration before centering;
s8: secondary grouting: the equipment secondary grouting is that the primary grouting is finished, foundation bolts are fastened to a specified torque, all equipment couplers are found to be qualified and accepted, under the condition, the equipment is subjected to secondary grouting and pouring, and grouting material bubbles are removed by adopting a multifunctional tipping bucket unloader before the primary grouting and the secondary grouting;
s9: equipment trial run: trial rotation is carried out on a water feeding pump steam turbine before a boiler blow pipe, after the pickling work of a water feeding pipeline is finished, a coupler between the water feeding pump steam turbine and a steam pump is connected, after the boiler blow pipe is finished, an auxiliary motor trial rotation is carried out, then a coupler between an auxiliary motor and an auxiliary gear box is connected, and after the auxiliary motor drives the auxiliary gear box to trial rotate normally, a main gear box coupler, an auxiliary gear box coupler and a coupler between a main gear box and a variable frequency generator are connected;
s10: connecting the two wheels: the auxiliary motor drives the frequency conversion generator to operate, the trial rotation is normal and the test is done and just can be connected with the last shaft coupling namely feed pump steam turbine and main gear box shaft coupling, the order of shaft coupling connection is: the coupling of the steam turbine and the steam pump → the coupling of the auxiliary gear box and the main and auxiliary motors → the coupling of the main gear box and the auxiliary gear box → the coupling of the main gear box and the variable frequency generator → the coupling of the steam turbine and the main gear box.
2. The installation and construction method of the coupled variable frequency generator as claimed in claim 1, wherein the method comprises the following steps: at S4, the equipment includes a steam feed pump, a feed pump turbine, a main gearbox, an auxiliary gearbox, a variable frequency generator, a motor, a condenser, a main tank, ancillary equipment, and a system.
3. The installation and construction method of the coupled variable frequency generator as claimed in claim 1, wherein the method comprises the following steps: in S6, the turbine alignment is to adjust the whole level and elevation of the turbine by adjusting the nut embedded in the drive turbine base, and the turbine alignment is completed.
4. The installation and construction method of the coupled variable frequency generator as claimed in claim 1, wherein the method comprises the following steps: in S6, the grouting procedure of the equipment is that after the steam turbine shaft diameter raise and the bearing mid-plane elevation meet the technical requirements of a manufacturing plant, primary grouting can be performed on foundation bolts of the steam turbine, after the maintenance reaches more than 80% of the design strength, the primary centering of a water supply pump, a main speed reducer and a steam turbine coupler is performed by taking the steam turbine as a reference, and after the center of the coupler meets the technical requirements of the manufacturing plant, primary grouting is performed on the foundation bolts of the water supply pump and the main speed reducer; after the curing period reaches more than 80% of the design strength, primarily centering the main speed reducer and the variable-frequency generator and the main speed reducer and the auxiliary speed reducer by taking the main speed reducer as a reference, and performing primary grouting on foundation bolts of the variable-frequency generator and the auxiliary speed reducer after the center of the coupler meets the technical requirements of a manufacturing factory; after vice speed reducer rag bolt grout maintenance reaches design intensity more than 80%, use vice speed reducer as the reference object, carry out the preliminary center of seeking of motor and vice speed reducer shaft coupling, after the shaft coupling center accords with the manufacturer technical requirement, carry out grout once to motor rag bolt, and should be with the inside chisel hair of rag bolt hole before the equipment fixing to can better atress behind the messenger rag bolt grout.
5. The installation and construction method of the coupled variable frequency generator as claimed in claim 1, wherein the method comprises the following steps: in S7, the sequence of centering using the multifunctional centering bracket is: 1) centering a steam turbine and a steam pump; 2) centering a steam turbine and a main gearbox; 3) centering the main gearbox and the variable-frequency generator; 4) centering the main gear box and the auxiliary gear box; 5) the auxiliary gear box is centered with the main and auxiliary motors.
6. The installation and construction method of the coupled variable frequency generator as claimed in claim 1, wherein the method comprises the following steps: in S7, when the multifunctional centering support is used for centering, the multifunctional centering support is fixed on a hub, and then a dial indicator is arranged on a shaft shoulder to carry out radial deviation measurement; measuring the axial clearance by using two dial indicators which are 180 degrees at intervals, rotating the dial indicators for 360 degrees, recording the axial clearance once when each dial rotates for 90 degrees, reading the difference values of the upper part, the lower part, the left part and the right part, namely the central deviation value and the mouth opening value, taking the reading calculation result of the radial indicator as the central deviation value, taking the reading calculation result of the axial indicator as the mouth opening value, and recording; after data measurement, the center of the coupler is adjusted as required, and the gasket of the equipment is adjusted or the equipment is moved left and right according to the technical requirement of the center of a manufacturer until the data of the center and the excircle meet the technical requirement of the manufacturer.
7. The installation and construction method of the coupled variable frequency generator as claimed in claim 1, wherein the method comprises the following steps: in S9, before the equipment is operated, the oil system equipment, the oil pipeline, the steam guide pipe, the main steam and the control valve are installed, the blowpipe and the gate are restored after the main steam and the control valve are installed, and the small pipe is installed on the pipe with the diameter of 89 or less by using the small pipe fixed-quantity pulley pipe bender.
8. The installation and construction method of the coupled variable frequency generator as claimed in claim 7, wherein the method comprises the following steps: after an oil pipeline is installed, oil flushing is carried out, the oil flushing is divided into 4 stages, the 1 st stage is circulation in an oil tank, the 2 nd stage is that before lubricating oil enters a bearing box, short circuit circulation is carried out on an advancing oil return pipe and an oil return pipe of the bearing box, the 3 rd stage is that the lubricating oil enters the bearing box for circulation, and the 4 th stage is that the lubricating oil enters a control oil pipeline for circulation flushing; and (5) formally recovering the pipeline after washing, and performing tile turning cleaning inspection.
9. The installation and construction method of the coupled variable frequency generator as claimed in claim 8, wherein the method comprises the following steps: before oil washing, the recovery of particles in oil is carried out by utilizing a large-scale oil system particle collecting device, the specific operation is that a pipeline for filtering oil is connected through one end of a steel wire hose during oil filtering, the other end of the steel wire hose is connected with the inlet end of the collecting device, and a collecting cage is placed into an oil return pipe or a bearing box for short circuit circulation.
10. The installation and construction method of the coupled variable frequency generator as claimed in claim 1, wherein the method comprises the following steps: in the construction method, civil engineering construction and mechanical construction are performed alternately, civil engineering construction with the length of minus 5 meters is required before acceptance of a pump pit foundation with the length of minus 5 meters, civil engineering construction with a platform of 7.5 meters is required after a condenser is in place, civil engineering construction with a platform of 15.5 meters is required before primary grouting, small mechanical platform construction is required before secondary grouting, and civil engineering construction with a cover plate of 15.5 meters is required after secondary grouting.
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| CN202010256752.XA CN111441379A (en) | 2020-04-02 | 2020-04-02 | Installation and construction method of coupling variable-frequency generator |
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| CN115076243A (en) * | 2022-06-30 | 2022-09-20 | 内蒙古敕勒川糖业有限责任公司 | Centering and aligning method for large nonstandard shaft transmission equipment |
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