Some standard content:
ICS27.180
Machinery Industry Standard of the People's Republic of China
JB/104032004
Tower for off-grid wind turbine generator system2004-02-10 Issued
Implementation on 2004-06-01
Issued by the National Development and Reform Commission of the People's Republic of ChinaForeword
2 Normative references,
3 Tower classification
4 Loads．
5 Design requirements,
5.1 Design conditions,
5.2 Calculation methods and conditions
6 Material requirements,
6.2 Steel structure materials...
Welding procedure specification.
Surface protection,
Inspection rules
Factory inspection,
Judgment rules and re-inspection rules.
Handling of non-conforming products
Test methods
Test conditions.
Test methods,
Format and content of test report
Quality assurance
Packaging, storage, transportation
Appendix A
(Informative Appendix)
Report content
114 Electrical
Format and content of test report
IB/T 10403—2004
...... S
This standard is formulated for the first time.
JB/T10403--2004
This standard is formulated in accordance with the requirements of GB/T1.1-2000 "Guidelines for Standardization Work Part 1: Structure and Writing Rules of Standards". This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Wind Machinery. The drafting unit of this standard: Shangdu Animal Husbandry Machinery Co., Ltd. The main drafters of this standard: Shi Yanhai, Shi Rongzhi, Zhang Dongguang. 1 Scope
Off-grid wind turbine tower
This standard specifies the design and manufacturing requirements and test methods for off-grid wind turbine towers. JB/T10403--2004Www.bzxZ.net
This standard applies to the development and production of off-grid wind turbine towers with a rotor swept area of less than 40m2. 2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this standard. GB/T1228—1991 High-strength large hexagon head bolts for steel structures (negISO7412:1984) GB/T1229—1991 High-strength large hexagon nuts for steel structures (neqISO4775:1984) GB/T1230—1991 High-strength washers for steel structures (neqISO7416:1984) GB/T1231—1991 High-strength large hexagon head bolts and large hexagon nuts for steel structures 、Technical conditions for gaskets GB/T12467.1~~12467.4--1998 Welding quality requirements Fusion welding of metal materials GB/T13981--1992 General requirements for wind turbine design GB/T14091--1993 Classification of environmental parameters for mechanical products and their severity classification GB/T19001-2000 Quality management system requirements JB4708--2000 Welding process assessment for steel pressure vessels 3 Tower classification.
According to different structures, towers can be divided into:
a) Cable tower. Cable towers are usually composed of tower pipes, cables and base foundations: b) Non-cable towers. It is also divided into:
Tower tube base tower;
A truss tower.
4 Load
The load of the tower shall be determined in accordance with the provisions of Chapter 7 of GB/T13981-1992. 5 Design requirements
5.1 Design conditions
The design conditions include the following:
a) Load from the nacelle (including wind rotor load); b) Verticality of the tower axis and the horizontal plane; c) Wind load acting on the tower;
Service life: The design service life of the tower shall not be less than 15 years. The service life of the tower can be determined by calculation or fatigue test: Tower height: According to different geographical conditions and wind resources, combined with the power of wind turbines, the tower height is generally designed between 5m and 12m, and can also be determined by negotiation between users and manufacturers: IB/T 10403--2004 Temperature: The design temperature range of the tower is -40℃~+50℃; Salt spray: The corrosion effect of salt spray on its components should be considered when designing the tower, and corresponding protective measures should be taken. Dust: The influence of dust should be considered when designing the tower, such as the long-term erosion of the tower surface by dust. 5.2 Calculation method and conditions
5.2.1 Calculation of tower strength
The calculation of tower strength shall comply with the provisions of Chapter 7 and Chapter 8 of GB/T13981-1992. 5.2.2 Fatigue calculation of tower
All material data used in calculation shall comply with the relevant national standards. The allowable safety factor of fatigue strength shall be greater than 1.55.2.3 Natural frequency
The natural frequency of the tower under working condition shall be staggered with its natural frequency to avoid resonance. The natural frequency of the tower under working condition shall be greater than 10% of the 1st order of the wind wheel frequency and less than 10% of the 3rd order of the wind wheel frequency. 5.2.4 Bolt connection
All main connection bolts shall be subjected to strength calculation of limit load and fatigue load. All material data used in calculation shall comply with national standards. All connection bolts and nuts used shall comply with the provisions of GB/1228~1231. 5.2.5 Tower foundation
The calculation of tower foundation is divided into foundation part and anchor bolt part. The foundation part is calculated with ultimate load, and the geological structure of the foundation is fully considered. The anchor bolt connection shall comply with the provisions of 5.2.4. 5.2.6 Cable
For cable-type tower, according to the different heights of the tower, the cable layer is generally selected from 1 to 2 layers, and each layer is fixed with 3 to 4 cables. All cables must be calculated for ultimate load and fatigue strength. All material data used in calculations shall comply with the provisions of relevant national standards. The allowable safety factor of fatigue strength shall be greater than 1.5.5.2.7 Tower segmentation
If the order contract does not clearly stipulate, the tower segmentation shall consider the following factors: a) Transportation capacity:
b) Production efficiency:
Manufacturing cost:
d) Production conditions.
6 Material requirements
6.1 General
6.1.1 The selected materials shall meet the design and use requirements, and be suitable for processing and manufacturing and have good economic efficiency. 6.1.2 The performance indicators of the selected materials shall comply with the relevant national standards or other relevant technical requirements. 6.1.3 The selected materials shall be accompanied by the manufacturer's certificate and inspection sheet. 6.1.4 The main materials and materials used for main components shall be re-inspected for performance after entering the factory. The test type and scope shall be carried out in accordance with the design requirements or relevant regulations.
6.1.5 The performance indicators and quality grades of substitute materials shall be equivalent to those of the original materials. 6.2 Steel structure materials
6.2.1 If the user does not have special requirements for steel structure materials, ordinary electric welded steel pipes, seamless steel pipes for structures or hot-rolled equal angle steels and other materials can be selected according to the different forms of the tower. The performance indicators and specifications shall comply with the relevant national standards or industry standards. 6.2.2 For the cable materials used in the cable-stayed tower, steel wire ropes with anti-corrosion and rust removal treatment should be used, and their performance indicators and specifications should comply with relevant national standards or industry standards.
7 Welding procedure specification
JB/T 10403---2004
The quality assurance of welding operations should be carried out in accordance with the provisions of GB/T12467. In addition, the technical department of the manufacturer should compile and determine the welding procedure specification document (i.e. welding procedure instruction book) in accordance with JI34708, and the final determined procedure is the rule to be followed in the steel structure welding process.
8 Surface protection
The protection level of the tower should be determined according to the provisions of GB/T14091. 9 Inspection rules
9.1 Factory inspection
9.1.1 Inspect the geometric dimensions of the tower components. 9.1.2 Inspect the matching of the tower components. 9.1.3 Check the appearance quality of the tower.
9.1.4 Other inspection items agreed upon by the manufacturer and the user. 9.2 Judgment rules and re-inspection rules
9.2.1 If the inspection result does not meet the technical conditions and requirements of the product, it is judged as unqualified. 9.2.2 At least 2 sets shall be inspected each time. If one indicator fails in the inspection, double the number of towers shall be sampled from the same batch for re-inspection. If it still fails, the batch of towers shall be inspected one by one. 9.3 Handling of unqualified products
9.3.1 Unqualified towers shall be clearly marked and stored or handled separately. Mixing with qualified products is prohibited. 9.3.2 For towers with minor defects that do not affect safe use and performance requirements, they can be regarded as qualified products after necessary treatment and approval by the user.
10 Test method
10.1 Test conditions
10.1.1 Test site
The test of wind turbine towers shall be completed outdoors. The test site shall be flat and open, and the installation location shall meet the requirements of the tower installation and operation instructions.
10.1.2 Test tower
10.1.2.1 The test tower shall be accompanied by relevant technical documents, drawings and installation and operating instructions. 10.1.2.2 Product samples shall be accompanied by product inspection certificates and product sampling sheets. 10.1.3 Test instruments
10.1.3.1 The instruments used in the test shall be within the validity period of the inspection and approval of the metrology department, and one calibration source (instrument manufacturer or standard laboratory) is allowed to perform calibration twice.
10.1.3.2 The vibration measuring instrument shall meet the following requirements:
Measurement range: 0mm～2mm;
Accuracy level: ≤2.5 level;
Frequency range: 2Hz～500Hz.
10.2 Test method
10.2.1 Assemble the tower according to the requirements of the tower installation drawing and operating instructions. 10.2.2 Use a vibration meter to measure its natural frequency. 10.2.3 According to the conversion formula of wind rotor speed and its corresponding rotation frequency: f
JB/T 10403-2004
Wherein:
f-wind rotor rotation frequency, unit is Hz;
-wind rotor speed, unit is r/min.
10.2.4 The natural frequency of the tower shall meet the requirements of 5.2.3. 10.3 Test report format and content
For the test report format and content, please refer to Appendix A. Quality assurance
It is recommended that the manufacturer's quality assurance system should meet the requirements of GB/T19001--2000. 11.2 The manufacturer shall ensure the effectiveness of the quality assurance system 12 Packaging, storage and transportation
12.1 Packaging
The packaging of the tower should ensure that it will not be bumped or damaged due to poor packaging under normal storage and transportation conditions. The tower should be packed in plastic woven bags, straw bales or wooden boxes according to the distance of transportation. The tower assembly drawing, packing list and certificate of conformity should be provided to the user along with the tower. The text and logo on the outer wall of the packaging box should be clear and neat, and the content is as follows: a) The name of the shipping station and the manufacturer;
b) The name of the receiving station and the receiving unit:
c) The weight of the tower and the gross weight of the packaging box; d) The size of the packaging box.
12.2 Storage
The tower can be stored in the open air, but the tower must be properly protected to avoid damage to the tower surface protective layer due to collision. 12.3 Transportation
It should be ensured that the tower is not damaged by mutual squeezing and collision during transportation. 4
A.1 Format
A.1.1 Cover
Appendix A
(Informative Appendix)
Format and content of test report
The cover should include the name of the test report, the unit and date of report preparation, etc. A.1.2 Second cover
JB/T 10403—--2004
The second cover includes the following contents: report name, report number, test location, test person in charge, test date, main test participants, and report preparation date.
A.2 Contents of the report
A.2.1 Introduction
Task source, test purpose, test time, etc. A.2.2 Test unit
Introduction to the test unit, list the main technical parameters and characteristics according to the design or manufacturer's instructions. A.2.3 Test equipment
Name, model, specification, accuracy level, inspection date, installation status of each sensor, etc. of the main instruments, meters, and devices. A.2.4 Test items
Name of test items, test conditions
A.2.5 Test methods
Test methods and relevant standard codes and names. A.2.6 Test results
List the necessary original data separately, get the results after sorting, correcting, calculating and processing, draw the necessary characteristic foot lines, analyze the problems that occurred during the test, and put forward improvement opinions and suggestions. A.3 Others
Test photos should generally be attached to the report.
If the test is interrupted or a major failure occurs, the report should clearly state the cause of the interruption, the time and circumstances for continuing the test. Major failures should be described in detail and the treatment methods.2.1 Introduction
Task source, test purpose, test time, etc. A.2.2 Test unit
Introduction to the test unit, list the main technical parameters and characteristics according to the design or manufacturer's instructions. A.2.3 Test equipment
Name, model, specification, accuracy level, inspection date, installation status of each sensor, etc. of the main instruments, meters, and devices. A.2.4 Test items
Name of test items, test conditions
A.2.5 Test method
Test method and relevant standard codes and names. A.2.6 Test results
List the necessary original data separately, get the results after sorting, correcting, calculating and processing, draw the necessary characteristic foot lines, analyze the problems that occurred during the test, and put forward improvement opinions and suggestions. A.3 Others
Test photos should generally be attached to the report.
If the test is interrupted or has important failures, the reason for the interruption and the time and situation of continuing the test should be clearly stated in the report. Important faults should be described in detail along with the solutions.2.1 Introduction
Task source, test purpose, test time, etc. A.2.2 Test unit
Introduction to the test unit, list the main technical parameters and characteristics according to the design or manufacturer's instructions. A.2.3 Test equipment
Name, model, specification, accuracy level, inspection date, installation status of each sensor, etc. of the main instruments, meters, and devices. A.2.4 Test items
Name of test items, test conditions
A.2.5 Test method
Test method and relevant standard codes and names. A.2.6 Test results
List the necessary original data separately, get the results after sorting, correcting, calculating and processing, draw the necessary characteristic foot lines, analyze the problems that occurred during the test, and put forward improvement opinions and suggestions. A.3 Others
Test photos should generally be attached to the report.
If the test is interrupted or has important failures, the reason for the interruption and the time and situation of continuing the test should be clearly stated in the report. Important faults should be described in detail along with the solutions.
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