Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T6224-1992
Quality Control Specification for Gas Turbines
Issued on June 16, 1992
Implemented on January 1, 1993 by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Quality Control Specification for Gas Turbines
Subject Content and Scope of Application
JB/T6224-1992
This standard specifies the quality control requirements in the manufacturing process of gas turbines, and provides the main basis for manufacturers and suppliers to formulate documents on the quality assurance system of gas turbines.
This standard applies to gas turbine manufacturers and suppliers. Reference standards
GB/T10300
GB2900.47
JB4399
ZBK56003
3 Terminology
3.1 Quality system
Quality management and quality assurance Terminology
Part 1
Quality management and quality assurance
Electrical terminology Gas turbine
Gas turbine-procurement
Gas turbine oil system cleanliness
To ensure that the quality of products, processes or services meets the specified requirements or potential requirements. An organic whole composed of organizational structure, responsibilities, procedures, activities, capabilities and resources.
Quality control
Operational techniques and activities taken to maintain the quality of products, processes or services to meet the specified quality requirements. Quality assurance
All planned and systematic activities necessary to ensure that the quality of products, processes or services meets the specified quality requirements. 3.4
Sub-supplier
The unit that provides materials to the gas turbine manufacturer. Other terms are in accordance with GB6583.1 and GB2900.47. General requirements for quality control
4.1 Quality system requirements
The gas turbine manufacturer shall formulate quality policies and quality objectives, form documents, and take necessary measures to ensure that the quality policies can be mastered and implemented by all employees of the factory.
4.1.2 The manufacturer and sub-supplier shall establish a quality plan. Form documents and make them operate effectively to ensure that the products meet the specified requirements. The quality system should run through the entire process of product manufacturing, mainly including the following stages. 4.1. 2.1
Market research and feasibility analysis;
Design, specification preparation and product development; procurement;
Process preparation;Www.bzxZ.net
Approved by the Ministry of Machinery and Electronics Industry on June 16, 1992 and implemented on January 1, 1993
Production process;
Inspection and testing;
Packaging and busy storage;
Sales and shipment;
On-site installation, commissioning and operation;
Technical service and maintenance.
Quality system documents mainly include:
Quality policy and procedures;
JB/T 6224-1992
Quality manual, which is the main document used in establishing and implementing the quality system; quality plan;
Quality records.
4.2 Design Control
4.2.1 The manufacturer and the sub-supplier shall formulate and implement the control and verification procedures for the design of products and parts to ensure that the specified requirements are met. 4.2.2 Before product design, market research should be conducted to predict the market requirements for products and accurately determine user needs. A formal product concept report should be put forward based on the feasibility study. Its main contents include product performance, main technical and economic indicators, applicable standards and regulations, quality assurance (verification), etc.
4.2.3 Main contents of design control
4.2.3.1 Design and development plan
The manufacturer shall formulate a design and development plan and design procedures. In the design process, in addition to user needs, designers shall also consider safety, environment and other regulatory requirements.
4.2.3.2 Design input and design output
The manufacturer shall determine the requirements for product design input, compile them into documents, and review whether they are appropriate. Design input shall comply with the requirements of JB4399.
The design output shall meet the requirements of the design input and be compiled into documents, including drawings, specifications, calculation books and analysis reports. 4.2.3.3 Design Verification
The manufacturer shall carry out design verification in a planned manner to determine whether the design output can meet the requirements of the design input. The main methods that can be used are:
Conduct design review;
Conduct identification tests;
Use other calculation methods to verify the correctness of the original calculation results and analysis; when possible, compare the new design with proven similar designs; d.
Verify by a third party such as a testing center recognized by the state or higher-level competent authorities. e.
4.2.3.4 Design Review
At the end of each stage of design and development, the relevant departments shall participate in a formal, systematic and rigorous review of the design results, and include the review results in the documents.
The review contents of different design stages shall be in accordance with Article 8.5.2 of GB/T10300,5. The main items include: a.
Applicability of the product;
Advancedness and competitiveness of the product;
Value engineering analysis;
The working ability of the product under the predetermined use and environmental conditions; Safety and environmental compatibility;
Reliability, durability and maintainability,
Standardization review;
JB/T 6224-1992
h. Processability of the design. Verifiability and testability; Technical and economic analysis.
4.2.3.5 Design finalization and production
The results of the final design review shall be incorporated into the specifications and drawings to form a formal design finalization technical document. If there are major modifications to the original design after the appraisal test, detailed descriptions shall be given to facilitate strengthening quality control when the product is officially put into production. The finalized design documents must be approved by the technical management departments at all levels related to the product before the product can be officially put into production. 4.2.3.6
Design changes
The manufacturer shall formulate and implement the design change procedures, including change marking, document preparation, approval procedures, change execution and emergency change methods, etc.
4.3 Document control
4.3.1 Document approval and release
The manufacturer shall formulate and implement control procedures for all documents and materials related to the requirements of this standard. The documents shall be approved by the authorized person before release. Document control shall ensure:
All places that play an important role in the effective operation of the quality system shall use the valid version of the corresponding documents; a
b. Timely recover the work documents from all places of issuance and use. 4.3.2 Document changes
The approval of document changes should be carried out by the original approval department (person) of the document. After the document is changed, a modification notice shall be issued to the relevant departments. After a certain number of changes, the document shall be reprinted. 4.4 Procurement
4.4.1 The manufacturer shall ensure that the purchased materials meet the specified requirements. The procurement quality control shall be in accordance with Chapter 9 of GB/T10300.5. The main contents of the control are:
4.4.1.1 Evaluation of sub-suppliers
The manufacturer shall select sub-suppliers based on their ability to meet the requirements of the sub-contract (including quality requirements). The selection of sub-suppliers and the type and scope of control by the manufacturer shall depend on the type of purchased materials, the quality assurance ability of the sub-suppliers, etc. The manufacturer shall ensure that its quality system can effectively control the sub-suppliers. 4.4.1.2 Procurement documents
The procurement documents prepared by the manufacturer shall clearly state the requirements for the purchased materials, mainly including: style (model) and grade;
drawings, inspection procedures and applicable specifications; b.
The adopted quality system standards.
4.4.1.3 Verification of purchased materials
The manufacturer shall verify whether the purchased materials meet the requirements and reach an agreement with the supplier on the verification method. 4.4.2 Provisions for handling quality disputes
In order to better coordinate and resolve quality disputes between the supply and demand parties, provisions and agreements for handling routine and non-routine issues shall be made. 4.4.3 Incoming goods control
Measures such as isolated storage should be taken to properly control the received materials to prevent misuse. Storage and maintenance procedures should also be formulated and implemented.
The manufacturer should ensure that materials (purchased materials and purchased parts) that fail inspection or verification are not put into use or processing. The corresponding verification method should be determined according to the degree of influence of the above materials on product quality, and verification should be carried out according to the inspection plan or prescribed procedures. Special attention should be paid to the control of the rough quality of castings and forgings.
The incoming goods quality records must be kept, and the identification records of each batch of materials and the relevant original documents must be kept. Special attention should also be paid to the storage and protection of materials.
Process preparation
JB/T6224-1992
Before the product is put into production, the process department and other relevant units of the manufacturer should carry out sufficient process preparation work, the main contents of which include: 1 Processability review.
Develop a process plan and form a document.
Develop and document a process line or production control plan to ensure control of each process in the production and assembly process. 4.5.3
Develop and document a general process procedure. 4.5.4
4.5.5Perform necessary process tests and process verifications. 4.5.6Design and manufacture process equipment (self-made and purchased), and verify them. 4.6Control of the production process
Production process control refers to the quality control of the entire production process from the entry of raw materials into the factory to the production of crystals. The main contents are: Material control and traceability
Before production, all materials and purchased parts should comply with the corresponding specifications and quality standards. During the production process, materials should be reasonably isolated, transported and stored, and their storage period should be noted to maintain applicability. When the traceability of materials is critical to quality, their identification marks should be maintained throughout the entire production process. 4.6.2 Equipment control and maintenance
All production equipment should be verified for accuracy and precision before use. Equipment should be properly stored and maintained during downtime, and regularly inspected and recalibrated.
4.6.3 Process control
The manufacturer should determine the production and installation procedures that directly affect quality, formulate plans to ensure that these processes are under control, and pay special attention to the monitoring of key processes and the continuous supervision (tracking), identification and verification of special processes. 4.6.+ Document control
All drawings, specifications and other documents used in the production process (see 4.1.2.2 and 4.12) should be controlled. 4.6.5 Control of process changes
The responsibilities and authorities for process changes should be clearly defined. Changes in processes, equipment, materials, etc. caused by design changes should be clearly stated in the documents and implemented according to the prescribed procedures.
4.6.6 Control of verification status
During the entire manufacturing process, inspection records and markings should be made for the verification status of major components. 4.6.7 Control of non-conforming products
A control procedure for non-conforming products should be formulated and implemented, including the marking, recording, evaluation, isolation and handling of non-conforming products, and notification to relevant functional departments. At the same time, corrective measures should be taken to prevent similar situations from happening again. 4.7 Inspection and testing
4.7.1 Inspection and testing of incoming goods (purchased materials and purchased parts) see Article 4.4. 4.7.2 Inspection and testing between processes
Necessary inspection points should be set up in the process flow, and products should be inspected, tested and marked according to the quality plan or specified procedures. Inspections include first-piece inspection, self-inspection, fixed or return inspection, etc. Products that fail inspection or testing shall not be transferred to the next process (processing or assembly). 4.7.3 Final inspection and testing (finished product verification) The final inspection and testing of the product can only be carried out according to the inspection plan or specified procedures after the inspection and testing of each process (including incoming inspection) are qualified. Gas turbine manufacturers can use factory acceptance tests to verify that the product meets performance requirements and other quality requirements. Inspection and test records should be kept for a long time.
Products can only be shipped after the specified inspection and test activities have been completed and the relevant data and documents have been approved. 4.8 Control of inspection, measurement and test equipment The manufacturer should carry out necessary control over all measurement systems in product development, manufacturing, installation and maintenance to ensure the correctness of decisions or activities made based on measurement data. The control objects include measuring instruments, instruments, detection equipment, special test equipment and computer software. In addition, fixtures, equipment and process detection instruments that affect product or process characteristics should also be properly controlled. The key points of control shall be in accordance with the provisions of Article 4.11 of GB/T10300.2 and Article 13.2 of GB/T10300.5. The measuring instruments, test equipment and procedures used by the sub-suppliers shall also be controlled. Quality control of handling, storage, packaging and delivery 4.9
The manufacturer shall formulate and implement the procedures for product removal, storage, packaging and delivery. During the handling and storage process, measures shall be taken to prevent product damage or rust, etc. The inventory status shall be checked regularly to detect problems in time.
The packaging, protection (including the materials used) and marking processes shall be controlled, and the markings shall always remain intact. After the final inspection or test, the manufacturer shall take measures to protect the quality of the product and ensure that the quality meets the requirements at the time of delivery. 4.10 Control of quality of on-site installation and commissioning
Technical documents (installation and commissioning technical regulations, etc.) should be provided to guide the correct installation and commissioning, which should include provisions to prevent improper installation and commissioning or eliminate factors that reduce product quality, reliability, safety and performance. The test equipment, special equipment and tools used in on-site installation, commissioning and testing shall be qualified and verified. 4.11 After-sales service
Technical documents that meet the needs of users should be provided in a timely manner, including product assembly, installation, use, operation, maintenance, etc. Instructions and spare parts list, etc.
According to user needs, we can provide users with technical consultation, technical training, supply of spare parts and high-quality maintenance services. 4.12 Control of quality documents and records
The manufacturer should formulate and implement the procedures for marking, collection, cataloging, archiving, storage, custody, retrieval and processing of quality documents and records, as well as change and revision methods.
The quality documents that need to be controlled mainly include; drawings, technical specifications, inspection procedures, test procedures, work instructions, operation cards, quality manuals, operating procedures, and specific provisions for various quality assurance. The quality records that need to be controlled and preserved (including relevant quality records of suppliers) mainly include: inspection reports, test data, appraisal reports, verification reports, audit reports, Material review report, calibration data, quality cost report. 5 Quality control in the gas turbine production process 5.1 The main components of the gas turbine, including the induction cooker, main shaft, wheel disc, tie rod, nozzle holding ring, double ring (guard ring), moving and stationary blades, turbine nozzle, flame tube, fuel nozzle, combustion chamber transition section, combustion chamber casing, flame tube, bearings, important fasteners, etc., should be subject to key control of their materials.
The main components should be marked with furnace (batch) numbers, and purchased parts should be accompanied by the material inspection report of the sub-supplier, and the manufacturer should conduct re-inspections. 5.1.13
Material cards should be established for the main components, and they should be circulated with the components in the subsequent processes and must not be lost. 5.1.2
The main items of material control for the main components are: cylinder : Chemical composition, mechanical performance, hydraulic test, ball casting cylinder should also be inspected for spheroidization quality; spindle, wheel: chemical composition, mechanical performance, no bump inspection, macroscopic structure inspection; compound ring, nozzle ring: chemical composition, mechanical properties, X-ray flaw detection; moving blades, tie rods: chemical composition, mechanical properties, macroscopic structure inspection, hairline inspection, magnetic particle inspection; stationary blades, turbine nozzles: chemical composition, mechanical properties, magnetic particle inspection: flame tube, combustion chamber transition section: chemical composition, mechanical performance, non-destructive inspection; fuel nozzle: chemical composition, mechanical properties; combustion chamber shell: chemical composition, mechanical properties; flame tube: chemical composition, mechanical properties, non-destructive inspection; bearings: chemical composition, mechanical properties; important fasteners: chemical composition, mechanical performance, magnetic flaw detection. 5
JB/T 6224-1992
5.1.3 The material inspection report of the main parts should be archived. 5.2 The key items to be controlled during the processing of major parts are: 5.2.1 The surface roughness of the horizontal and vertical center planes of the cylinder; the clearance when tightening every two bolts after the upper and lower halves of the cylinder are closed; b. The main matching dimensions and positioning dimensions; d. The center line of each inner hole (the stationary blade groove of the compressor cylinder, the nozzle retaining ring and the double ring groove of the turbine cylinder, etc.) relative to the horizontal center plane.
Position tolerance;
Tolerance and surface roughness of threaded holes and locating holes for cylinder connection; e
Appearance quality of each gas,
Dimensional tolerance, cylindricity and surface roughness of journals; a.
Matching size and surface roughness of blade root groove; radial matching size;
Surface roughness and radial runout at the vibration or displacement of the measuring shaft; surface roughness and end face full motion of the thrust plate; axial dimension tolerance and matching size.
Matching size, size and surface roughness at the arc of blade root groove; size, position and surface roughness of the hole for tie rod; appearance quality of wheel disc.
5.2.4
Dimensional tolerance and straightness of tie rod;
Thread tolerance:
Surface roughness (including thread).
Turbine nozzle retaining ring
The matching dimensions and surface roughness of the root groove. 5.2. 6
Moving blades
The matching dimensions of the blade root and the surface roughness of the matching surface; the contour of the profile line and the surface roughness; the surface roughness at the key fillet;
The appearance quality of the film cooling hole.
Turbine nozzle
The matching dimensions and surface roughness of the nozzle assembly and the retaining ring: the contour of the profile line and the surface roughness; the surface roughness at the key fillet;
The processing quality of the cooling air channel.
Stationary blades
The matching dimensions of the blade root and the surface roughness of the matching surface; the contour of the profile line and the surface roughness. Flame Chapter
Flame Chapter Body matching dimensions, cylindricity and surface roughness; Processing quality of film cooling holes;
JB/T 62241992
Roundness and
Inner diameter dimension tolerance of elastic sealing piece;
Welding and appearance quality.
Combustion chamber transition section
Transition section profile and surface roughness; Main matching dimensions and surface roughness of matching surfaces; Welding and appearance quality.
Combustion chamber shell
Cylindricity of shell and surface roughness of both ends; Dimension tolerance, position and surface roughness of each hole on shell. Joint-melt tube
Cylindricity and surface roughness of joint-flame tube; Axial matching dimensions;
Processing quality of cooling holes on joint-flame tube;
Welding and appearance quality.
Fuel nozzle
Main parts of the fuel nozzle (atomizing air vortex, air swirler, overlay component, fuel guide vortex, nozzle, etc.) a.
Matching dimensions, surface roughness and form and position tolerances; b.
Thread tolerances of the magnetic nozzle housing and matching parts, and the surface roughness and form and position tolerances of the threads; welding quality of the housing.
Radial bearing
Bearing working surface profile dimensions and surface roughness; b.
Bearing alloy filtration quality;
Gap of the horizontal center plane after the bearing seat is closed with the upper cover; Dimensional tolerance and surface roughness of the oil inlet hole of the bearing bush; Dimensions, surface roughness and coaxiality of the tilting pad block in the tilting pad bearing with the bearing body. Thrust bearing
Thrust pad size tolerance and surface roughness; thrust pad contact area and pad inclination; important fasteners
Thread size tolerance and surface roughness;
Appearance quality of coating;
The closing size of fasteners with tightness requirements. Quality control during gas turbine assembly 6.1 Requirements for assembly site
6.1.1 The assembly site should be closed, and the infrastructure on site, such as the foundation of the main and auxiliary equipment, labor protection facilities, lifting and fire-fighting facilities, etc., should be accepted and qualified.
6.1.2 The tooling, equipment and auxiliary facilities used in the assembly process should be identified, and the elevation, center line, and position of the anchor bolt holes of the reserved holes, embedded shims, and the main equipment foundation related to the installation should be controlled. 6.1.3 The assembly site should be organized, designed and arranged according to the unit assembly requirements, and should also meet the following requirements; a. The ambient temperature at the assembly site should be kept above 10°C. When it is below 0°C, corresponding cold and moisture-proof measures should be taken for electrical and instrumental equipment;
JB/T 6224-1992
should have power sources, water sources, gas sources and corresponding lighting facilities that meet the requirements; b.
should have lubricating oil and fuel that meet the requirements; c.
should have certain transportation channels and material storage areas at the assembly site. d.
6.2 A process document guiding assembly should be formulated, which should specify the assembly method, equipment used, relevant standards and quality requirements. 6.3 Gas turbine assemblers should understand the unit structure, be familiar with the unit assembly technical requirements, and correctly master the assembly procedures, assembly processes and relevant precision measurement technologies.
6.4 The cleanliness of the parts entering the assembly site should be strictly controlled. The cleanliness of the pipelines and accessories in the fire prevention system should be focused on according to the requirements of Article 4.1 of ZBK56003.
6.5 Parts that fail inspection or testing shall not enter the assembly process. 6.6 Important processes in the assembly process such as rotor assembly, stator assembly, rotor dynamic balancing, rotor hanging into the air filter, rotor centering, oil system cleanliness, etc. should be monitored.
6.7 The quality control of the gas turbine in the assembly process should pay special attention to the following items: 6.7.1 Rotor assembly
The assembly sequence of the blades and the requirements for mass balance; the assembly clearance of the blades and the installation of the last blades; the assembly of the impeller;
The total runout of the impeller after assembly;
Blade measurement;
Assembly and preload of the tie rod;
The radial runout and end runout of the rotor body; the dynamic balancing accuracy of the rotor,
Stator assembly
Assembly of the compressor guide vanes;| |tt||Assembly of compressor stationary blades;
Installation angle, throat area and total flow area of flat nozzle assembly; Thermal expansion clearance of turbine nozzle retaining ring and nozzle assembly: Cylinder centering:
Unblocked condition of cooling air passage;
Bearing centering and bearing tightening force (clearance>);
Clearance of sliding pin system.
6.7.3 Oil system
The cleanliness of the oil system during assembly shall meet the requirements of ZBK56003. The main control contents are: Carbon steel pipelines (including pipe groups) and accessories Components should be pickled before and after assembly. Stainless steel pipes can be cleaned by other methods. All pipe groups should be flushed with hot oil.
The ends of the cleaned pipes (pipe groups) and the openings of other parts must be sealed; d.
After the assembly of the oil system pipes and parts, the subsystems and main components must be flushed with hot oil. After flushing, take oil samples according to regulations to measure the contamination degree. The value should meet the requirements of ZBK56003 standard. In addition to meeting the cleanliness requirements, the assembly of the pipeline system should also meet the following requirements: 6.7.3.2|| tt||The manufacturing accuracy and connection quality of the pipeline should be quality controlled; a,
b. Stainless steel pipes are not allowed to be assembled by heating and bending. All bending should be done by hydraulic or mechanical pipe bending machines. If deviations occur when assembling flanges and pipe joints, it is not allowed to eliminate them by heating stainless steel pipes or forcibly assembling them with external force. 6.7.4 Assembly of chassis
6.7.4.1 When assembling the chassis, the matching clearance of the thermal expansion sliding pin system on the chassis should be re-measured and meet the specified requirements. 8
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2 The center distance and diagonal distance of the chassis anchor bolt holes should be rechecked. If there are no special requirements, the center distance deviation should not exceed 2mm. 6. 7. 4. 2
6.7.4.3 The matching planes of the chassis and the cylinder supports should be in close contact. Color painting can be used for inspection. The contact area should be greater than 75%. When tightening the anchor bolts, the operation should be symmetrical according to the tightening torque specified in the technical documents. After tightening the anchor bolts, the water level of the cylinder and the center of the rotor should be rechecked, and the contact surface between the chassis and the cylinder support, and the assembly quality between the chassis and the shim should be checked. 6.7.5 Assembly requirements of the cylinder, bearing seat and slide pin.
6. 7. 5.2
6.7. 5. 4
The slide pins and pins on the cylinder, chassis or bearing seat must be firmly fixed. The gap or interference fit of the slide pin during installation should meet the specifications. The appearance quality of the cylinder should meet the requirements before assembly. The center plane of the cylinder should pass the seal inspection. The clearance when tightening one bolt every two bolts should meet the requirements. The fit between the shaft and the sleeve of the cylinder guide vane should be controlled. The threads of the bolts, nuts and cylinder threaded holes should be smooth and free of burrs, and the fit should be moderately tight. The gap between the cylinder connecting bolts and the screw holes should meet the thermal expansion requirements of the cylinder. 6.7.5.6
When installing the high-temperature explosion bolt, its threaded part should be coated with anti-seizure agent. When installing the bearing seat, the oil pipe and oil path should be kept unobstructed and clean. If the anti-rust oil applied on the inner surface of the oil pipe is incompatible with the used lubricating oil, it should be removed.
6. 7. 5. 8
6. 7. 5. 9
The horizontal center plane between the bearing seat and the bearing cover should pass the sealing inspection. When assembling the cylinder, the center plane should be coated with high-temperature resistant sealant. Installation of bearings and oil seals
Bearings should be checked before installation;
The oil inlet hole of the bearing is clean and unobstructed, and the diameter of the throttling orifice plate meets the requirements; b.
Scraping of the bearing is not allowed:
6. 7. 6. 2
6. 7. 6. 3
Each part of the bearing should be marked to determine the correct installation position and direction. The clearance of the radial bearing should be controlled during installation, and its value should meet the requirements. Check that the contact area between the radial bearing and the journal should be no less than 75% and evenly distributed. When installing the thrust bearing, its bearing surface should be smooth, the thickness of the thrust pad should be uniform, and the contact area and clearance value of the thrust pad should meet the design requirements.
6. 7. 6. 6
When installing the oil seal, the facets should be tightly combined and should not be misaligned, and the clearance of the oil seal should meet the requirements. After the bearing is assembled, the following assembly technical documents should be available: record of the amount of interference or interference between the bearings;
record of the thickness of the thrust pad;
record of the input clearance:
record of the diameter of the oil inlet throttle hole of the bearing.
Hoisting the rotor into the cylinder and centering
6.7.7.1 The following inspections should be carried out before the rotor is hoisted into the cylinder: a.
All parts of the rotor should be clean, free of rust and damage: the balance block, lock key, impeller tie rod bolts and other locking parts on the rotor hub should be securely locked; all cooling air channels in the rotor should be unobstructed; re-measure the rotor's lifting degree and the end face and radial runout of each level of impeller; the blades should be free of damage, the assembly should be flat, and the locking should be reliable. e.
6.7.7.2 The following checks should be carried out on the coupling on the rotor: B.
The parts on the coupling should not be loose, and the keys, locking screws, nuts, etc. should be reliably locked; the coupling bolts and nuts should have installation position marks: re-measure the radial runout of the outer or inner circle of the flange stop; 9
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The special coupling with the stop fitting should fit tightly. d.
6.7.7.3 When hoisting the rotor into or out of the cylinder, the rotor should be hoisted stably. 6.7.7.4
The value of the rotor centering should meet the requirements;
data.
6.7. 7. 6
After the rotor is centered, the bolts between the chassis and the bearing seat or the chassis and the cylinder, the cylinder and the support bearing surface should be tightened, and the centering should be remeasured. The dynamic and static distances between the rotor and the stator should be measured and recorded, and the rotor should be rotated. There should be no friction between the dynamic and static parts. 6.7.7.7
After the installation of the rotor and coupling, the following technical documents shall be available: rotor centering record;
dynamic and static clearance record of the rotor and stator;
axis centering record:
end face and radial runout record of the coupling; assembly of the flow-through part
The assembly of the nozzle shall meet the matching requirements. When installing the nozzle holder, each joint surface shall be evenly coated with high temperature resistant paint. The appearance shall be free of defects and the matching of the pins for fixing the upper and lower nozzle holders, the positioning keys of the duplex ring or the corresponding slots shall meet the requirements. The installation position of the nozzle holder and the duplex ring in the turbine cylinder shall be controlled. The installation and spacing of the gas seal shall meet the requirements. The gap of the flow-through part shall be measured according to the specified items, and its value shall meet the requirements. The rotating parts of the guide vane should be flexible and free, and the clearance between the guide vane shaft and the sleeve should meet the requirements. Assembly of the reduction gearbox and the turning device
The gearbox should be inspected as follows during installation: the gears and tooth surfaces should be free of damage;
The installation of the gears and bearings should comply with relevant regulations; the tooth side clearance should meet the requirements;
The tooth surface fit should meet the requirements:
The overspeed hammer in the auxiliary gearbox should meet the specified value. The horizontal joint surface of the gearbox should be in close contact, and the clearance should meet the requirements. After the gearbox cover is closed, the bolts on its joint surface should be tightened according to the tightening sequence and tightening torque. When installing the turning device, check:
The tooth surfaces of the rack and gear should be free of damage, and the fit should meet the requirements; the limit switches and control systems of the turning device should be sensitive and reliable; the internal fasteners of the turning device must be reliably locked; when the turning device is tested for action, its action should be flexible and accurate. Cylinder Covering of Gas Turbine
6.7. 18.1
Before covering the cylinder of the gas turbine, check that the internal parts of the cylinder are complete, the matching of parts must meet the requirements, the inside of the cylinder is clean and free of foreign matter,
The joints and fasteners of the cylinder should be painted with appropriate paint as required. 6.7.10.3
When hoisting the cylinder, there should be a reliable guiding device, and the cylinder covering work should be carried out continuously. After the cylinder covering is completed, the cylinder should be cranked, and there should be no metal friction sound in the cylinder. 6.7.10.5 The fasteners of the horizontal and vertical center planes of the cylinder should be tightened symmetrically according to the prescribed sequence and tightening torque. Assembly of the Combustion System
The fuel nozzle should pass the pressure leakage test, spray field test and be cleaned before installation. All parts must not be damaged, and the threaded parts should rotate freely. 6.7.11.1
7
After the rotor and coupling are installed, the following technical documents should be available: rotor centering record;
dynamic and static clearance record of rotor and stator;
axis centering record:
end face and radial runout record of coupling; assembly of flow-through part
The assembly of the nozzle should meet the matching requirements. When installing the nozzle holder, each joint surface should be evenly cleaned with high-temperature resistant paint. The appearance should be free of defects.
6. 7. 8. 2
The pins for fixing the upper and lower nozzle holders, the locating keys of the duplex ring or the corresponding slots should meet the requirements. The installation position of the nozzle holder and the duplex ring in the turbine cylinder should be controlled. The installation and spacing of the gas seal should meet the requirements. The gap of the flow-through part should be measured according to the specified items, and its value should meet the requirements. The rotating parts of the guide vane should be flexible and free, and the clearance between the guide vane shaft and the sleeve should meet the requirements. Assembly of the reduction gearbox and the turning device
The gearbox should be inspected as follows during installation: the gears and tooth surfaces should be free of damage;
The installation of the gears and bearings should comply with relevant regulations; the tooth side clearance should meet the requirements;
The tooth surface fit should meet the requirements:
The overspeed hammer in the auxiliary gearbox should meet the specified value. The horizontal joint surface of the gearbox should be in close contact, and the clearance should meet the requirements. After the gearbox cover is closed, the bolts on its joint surface should be tightened according to the tightening sequence and tightening torque. When installing the turning device, check:
The tooth surfaces of the rack and gear should be free of damage, and the fit should meet the requirements; the limit switches and control systems of the turning device should be sensitive and reliable; the internal fasteners of the turning device must be reliably locked; when the turning device is tested for action, its action should be flexible and accurate. Cylinder Covering of Gas Turbine
6.7. 18.1
Before covering the cylinder of the gas turbine, check that the internal parts of the cylinder are complete, the matching of parts must meet the requirements, the inside of the cylinder is clean and free of foreign matter,
The joints and fasteners of the cylinder should be painted with appropriate paint as required. 6.7.10.3
When hoisting the cylinder, there should be a reliable guiding device, and the cylinder covering work should be carried out continuously. After the cylinder covering is completed, the cylinder should be cranked, and there should be no metal friction sound in the cylinder. 6.7.10.5 The fasteners of the horizontal and vertical center planes of the cylinder should be tightened symmetrically according to the prescribed sequence and tightening torque. Assembly of the Combustion System
The fuel nozzle should pass the pressure leakage test, spray field test and be cleaned before installation. All parts must not be damaged, and the threaded parts should rotate freely. 6.7.11.1
7
After the rotor and coupling are installed, the following technical documents should be available: rotor centering record;
dynamic and static clearance record of rotor and stator;
axis centering record:
end face and radial runout record of coupling; assembly of flow-through part
The assembly of the nozzle should meet the matching requirements. When installing the nozzle holder, each joint surface should be evenly cleaned with high-temperature resistant paint. The appearance should be free of defects.
6. 7. 8. 2
The pins for fixing the upper and lower nozzle holders, the locating keys of the duplex ring or the corresponding slots should meet the requirements. The installation position of the nozzle holder and the duplex ring in the turbine cylinder should be controlled. The installation and spacing of the gas seal should meet the requirements. The gap of the flow-through part should be measured according to the specified items, and its value should meet the requirements. The rotating parts of the guide vane should be flexible and free, and the clearance between the guide vane shaft and the sleeve should meet the requirements. Assembly of the reduction gearbox and the turning device
The gearbox should be inspected as follows during installation: the gears and tooth surfaces should be free of damage;
The installation of the gears and bearings should comply with relevant regulations; the tooth side clearance should meet the requirements;
The tooth surface fit should meet the requirements:
The overspeed hammer in the auxiliary gearbox should meet the specified value. The horizontal joint surface of the gearbox should be in close contact, and the clearance should meet the requirements. After the gearbox cover is closed, the bolts on its joint surface should be tightened according to the tightening sequence and tightening torque. When installing the turning device, check:
The tooth surfaces of the rack and gear should be free of damage, and the fit should meet the requirements; the limit switches and control systems of the turning device should be sensitive and reliable; the internal fasteners of the turning device must be reliably locked; when the turning device is tested for action, its action should be flexible and accurate. Cylinder Covering of Gas Turbine
6.7. 18.1
Before covering the cylinder of the gas turbine, check that the internal parts of the cylinder are complete, the matching of parts must meet the requirements, the inside of the cylinder is clean and free of foreign matter,
The joints and fasteners of the cylinder should be painted with appropriate paint as required. 6.7.10.3
When hoisting the cylinder, there should be a reliable guiding device, and the cylinder covering work should be carried out continuously. After the cylinder covering is completed, the cylinder should be cranked, and there should be no metal friction sound in the cylinder. 6.7.10.5 The fasteners of the horizontal and vertical center planes of the cylinder should be tightened symmetrically according to the prescribed sequence and tightening torque. Assembly of the Combustion System
The fuel nozzle should pass the pressure leakage test, spray field test and be cleaned before installation. All parts must not be damaged, and the threaded parts should rotate freely. 6.7.11.1
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