JB/T 10425.1-2004 Yaw system of wind turbine generator set Part 1: Technical requirements
Some standard content:
ICS 27.180
Machinery Industry Standard of the People's Republic of China
JB/T10425.12004
Yaw system of wind turbine generator systemsParti:Technology condition
Issued on February 10, 2004
Implemented on June 1, 2004
Issued by the National Development and Reform Commission of the People's Republic of ChinaForeword
Scope,
Normative references
3 Terms and definitions
4 Technical requirements.
Technical requirements for yaw system
Technical requirements for main components
Hydraulic system
5 Inspection items and rules
Appearance inspection
Calibration of geographic orientation detection device
Yaw action Test.
Yaw speed test
Yaw positioning accuracy test
Yaw damping test
Yaw braking torque test.
Uncable action test
Test method,
Judgment criteria,
Marking,
Packaging and transportation
Quality assurance
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JR/T 10425.1—2004
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JB/T10425 "Yaw system of wind turbine generator set" is divided into two parts: Part 1: Technical conditions:
Part 2: Test methods.
This part is the first part of JB/T10425. This part is formulated for the first time.
JB/T 10425.1—2004
The preparation of this part complies with the provisions of GB/T1.1-2000 "Guidelines for Standardization Work Part 1: Structure and Preparation Rules of Standards". This part is proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Technical Committee for Standardization of Wind Power Machinery. The drafting unit of this part: Yituoyi Meide (Luoyang) Wind Power Equipment Co., Ltd. The main drafters of this part: Wang Hongping and Du Guangping. 1 Scope
JB/T 10425.1—2004
Yaw system of wind turbine generator set Part 1: Technical conditions This part specifies the main types, basic parameters, technical requirements, inspection items and rules, marking and packaging and transportation basic requirements of the yaw system of grid-connected wind turbine generator sets.
This part applies to the yaw system of horizontal axis grid-connected wind turbine generator sets. 2 Normative references
The clauses in the following documents become the clauses of this part through reference in this part of JB/T10425. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest versions apply to this part GB/T1228 High-strength large hexagonal bolts for steel structures (GB/T1228-1991, neqISO7412:1984) GB/T1229 High-strength large hexagonal nuts for steel structures (GB/T1229-1991, neqISO4775:1984) GB/T1230 High-strength washers for steel structures (GB/T1230-1991, neqISO7416: 1984) GB/T1239.4 Technical conditions for hot-rolled cylindrical helical springs GB/T1972
Disc springs
GB/T2900.53 Electrical terminology Wind turbine generator sets (GB/T2900.53—2001, idtIEC60050-415:1999) Calculation method for load capacity of involute cylindrical gears (GB/T3480—1997, eqvISO6336-1～6336-3:1996) GB/T 3480
GB/T 6391
Rated dynamic load and rated life of rolling bearings (GB/T6391-1995, idtISO281:1990)Calculation method for the gluing load capacity of involute cylindrical gears (GB/T6413--1986, eqvISO/DP6336-4)GB/T 6413
GB/T 13384
General technical conditions for packaging of electromechanical products
Safety requirements for wind turbines (GB18451.1--2001, idtIEC61400-1:1999)GB 18451.1
JB/T2300—1999 Slewing bearing
JB/T3063
Technical conditions for sintered metal friction materials
JB/T10300--2001 Design requirements for wind turbines JB/T10425.2 Yaw system of wind turbines Part 2: Test methods 3 Terms and definitions
The terms and definitions established in GB/T2900.53 and the following terms and definitions apply to this part 3.1
Active yaw
Yaw mode that uses electric or hydraulic drag to complete the wind-facing action. 3.2
Passive yaw
Yaw mode that relies on wind power to complete the wind-facing action through related mechanisms. The common ones are tail rudder, wheel and downwind automatic wind-facing. 3.3
Yaw drive
The driving component of the yaw action in the active yaw system of a wind turbine, usually including an electric motor or a hydraulic motor, a reducer and a driving gear, etc.
JB/T 10425.1—2004
Cable-unwinding
The operation and action of removing the twisted cable caused by yaw (generally using the reverse yaw method). 4 Technical requirements
4.1 Technical requirements for yaw system
4.1.1 General requirements
The yaw system shall meet the following requirements:
a) The design of the yaw system of the wind turbine generator set shall comply with the requirements of this part and shall be manufactured according to the drawings and design documents approved by the prescribed procedures; b) The yaw system shall comply with the relevant provisions of GB18451.1 and shall adopt a fail-safe design; c) For important control functions, such as cable twist detection and cable unwinding, redundant design shall be adopted to ensure safety; d) The installation of each component shall comply with the provisions of its installation and operation manual or relevant standards. 4.1.2 Working environment temperature
Normal temperature type: -20℃~+50℃;
Low temperature type: -30℃~+50℃.
4.1.3 Quality deviation
The deviation between the actual quality and the design value shall not exceed 3%. 4.1.4 Structural form
Grid-connected wind turbine generator sets should adopt active yaw system: The yaw system of grid-connected wind turbine generator sets should adopt gear drive form: The gear drive yaw system should consist of yaw bearing, yaw gear and reduction device, drive motor (or hydraulic motor) and yaw brake. The yaw of the nacelle is driven by the drive motor or hydraulic motor, and the driving force is transmitted to the tower body by the yaw bearing. 4.1.5 Cable unwinding and cable twisting protection
The yaw action may cause the connecting cable between the nacelle and the tower to twist. The degree of cable twisting should be measured by a direction-related counting device or similar procedure.
For active yaw system, the cable unwinding action should be triggered before the specified twisting angle is reached; the yaw system should have cable twisting protection function. 4.1.6 Yaw speed
For grid-connected wind turbine generator sets, in order to avoid excessive gyroscopic torque on the rotor shaft and blade shaft, the yaw speed value should be determined through system mechanics analysis. The recommended speed values are shown in Table 1.
Wind turbine power kw
Yaw speed r/min
4.1.7 Yaw damping
100~200
250~350
500~700
During the yaw process, there should be an appropriate damping torque to ensure stable yaw and accurate positioning. 4.1.8 Azimuth detection
The yaw system of the wind turbine should be equipped with a geographic azimuth detection device. 4.2 Technical requirements for main components
4.2.1 Yaw bearing
4.2.1.1 Structural form
The inner and outer rings of the yaw bearing of the yaw gear ring are connected to the nacelle and the tower with bolts respectively. The gear teeth can be of internal or external gear type
a) External gear type
The gear teeth are located on the outer ring of the yaw bearing, and the processing, manufacturing and assembly are relatively simple; 2
800~1000
1200~1500
b) Internal gear type
The gear teeth are located on the inner ring of the yaw bearing, and the internal gear meshing and force bearing effect are better. 4.2.1.2 Yaw bearing design calculation
4.2.1.2.1 Gear tooth strength calculation
The calculation method shall refer to GB/T3480 and GB/T6413. 4.2.1.2.2 Bearing design calculation
The calculation method shall refer to JB/T2300 and GB/T6391. 4.2.1.3 Lubrication
JB/T10425.1—2004
The yaw bearing shall use the lubricant and lubricating oil recommended by the manufacturer. The bearing shall be sealed to ensure that the movement between adjacent components will not have a harmful effect.
4.2.1.4 Requirements for yaw bearing parts
See Chapter 5 of JB/T2300—1999.
4.2.2 Yaw drive
4.2.2.1 The structural forms of yaw drive are divided into: a) Motor drivebzxz.net
The yaw gear is driven by the yaw drive motor through a reducer; b) Hydraulic drive
The yaw gear is driven by the hydraulic motor through a reducer. 4.2.2.2 Selection and design of yaw drive: The yaw drive motor, hydraulic motor and reducer can be selected and designed according to needs, but they shall comply with relevant national standards and shall not interfere with other subsystems of the wind turbine generator set. 4.2.2.3 The yaw motor shall adopt a three-phase AC motor with a protection level not less than IP54. 4.2.2.4 The yaw reducer may adopt a planetary reducer or a worm gear and a planetary reducer in series. 4.2.2.5 The yaw drive requires smooth starting, uniform rotation speed, and no vibration. 4.2.3 Yaw brake
4.2.3.1 Structural form
The yaw brake shall adopt a caliper disc brake. The following forms can be selected: a) Normally closed caliper disc brake
The brake adopts spring clamping and electric or hydraulic drag release to achieve damping yaw and failure safety. b) Normally open caliper disc brake
The brake shall adopt high pressure clamping during braking and low pressure clamping during yaw to achieve damping yaw. When this form is adopted, there should be a self-locking link in the yaw transmission chain.
4.2.3.2 Strength calculation
The design calculation of the yaw brake is carried out according to the yaw brake part of JB/T10300. 4.2.3.3 Brake caliper
The brake caliper consists of a brake caliper body and a brake pad. For grid-connected wind turbines, the number of brake calipers shall not be less than 2. The brake caliper body shall be fixed to the frame with high-strength bolts and sufficient torque. The brake pad shall be made of special friction material. For technical requirements of friction materials, please refer to JB/T3063.4.2.3.4 Brake disc
The brake disc is generally annular and is usually located on the tower or the adapter between the tower and the nacelle, and shall meet the following requirements: a) The brake disc material shall have sufficient strength, rigidity and certain toughness; if welded, it shall also have good weldability b) The connection and fixation of the brake disc shall be firm and reliable, and fatigue damage shall not occur during the service life: c) The surface roughness of the brake disc shall reach R.=3.2um. 3
JB/T 10425.1—2004
4.2.3.5Brake spring
shall comply with the provisions of GB/T1239.4 or GB/T1972. 4.2.3.6Brake performance requirements
Brake performance shall meet the following requirements:
Rated braking torque value shall not be less than the design value: a)
b)During yaw, the damping torque shall remain stable, with a deviation of less than 5% from the design value; there shall be no abnormal noise during braking.
4.2.3.7Brake accuracy requirements
Brake accuracy shall meet the following requirements:
a)The surface roughness of the assembly surface between the brake and the frame shall meet the standard of Ra=3.2um; b)The assembly clearance between the periphery of the brake pad and the brake caliper body shall not be greater than 0.5mm at any point. 4.2.4 Bolt connection
All connecting bolts shall be subjected to ultimate load and fatigue load strength calculations, and the material data used in the calculations shall be selected according to relevant national standards. All high-strength bolts, nuts and washers for steel structures shall comply with the provisions of GB/T1228, GB/T1229 and GB/T1230 respectively. 4.2.5 Surface treatment
The surface treatment of each component shall be able to adapt to the working environment requirements of the wind turbine generator set. 4.3 Hydraulic system
The hydraulic system shall meet the following requirements:
a) The hydraulic pipeline shall be made of seamless steel pipe, and the flexible pipeline connection part shall be made of suitable high-pressure hose. The bolted pipe pipeline connection assembly shall be tested to show that it can ensure the required sealing and withstand the dynamic loads occurring during operation; the design, selection and layout of hydraulic components shall comply with the requirements of relevant regulations on hydraulic systems: b)
c) The hydraulic system pipeline shall be kept clean and have good anti-oxidation performance: d) The hydraulic system shall be well sealed and leak-free. 5 Inspection items and rules
5.1 Appearance inspection
The yaw system should be installed and connected correctly, in accordance with the requirements of the drawing process and technical standards: The surface should be clean and free of dirt, rust and damage. The machined surface should not have defects such as flash, burrs, sand holes, welding spots, oxide scale, etc. The weld should be uniform and free of cracks, bubbles, slag inclusions, meat biting, etc.
5.2 Calibration of the wing of the geographic orientation detection
The geographic orientation detection device should be calibrated during the commissioning stage of the wind turbine generator set, and the error should be less than 5°. 5.3 Yaw action test
It is required that the forward and reverse rotations are smooth and there should be no abnormal noise or vibration. 5.4 Yaw speed test
It is required that the deviation between the actual average speed and the design rated value does not exceed 5%5.5 Yaw positioning accuracy test
It is required that after the action is completed, the maximum deviation between the wind rotor axis and the wind direction is not more than 5°. 5.6 Yaw damping test
Requires that the deviation between the actual total damping torque and the design rated value does not exceed 5%5.7 Yaw braking torque test
Requires that the actual total braking torque value is not less than the design rated value. 5.8 Cable release test
Test the initial cable release, ultimate cable release and cable twist protection respectively, and require the action to be accurate and reliable without malfunction. 4
5.9 Test method
Perform in accordance with JB/T10425.2.
5.10 Judgment criteria
IB/T 10425.1--2004
The inspection items specified in the yaw system require 100% to be carried out. For the inspection items that do not meet the specified requirements, the yaw system of the tested unit needs to be debugged until the test items meet the requirements of this standard; if the specified requirements are still not met after debugging, it is judged as unqualified. 6 Marking
The main components of the yaw system should have a factory nameplate, which should generally include: manufacturer name and registered trademark;
b) product name and model;
factory number;
d) manufacturing date:
implementation standard number.
Other permanent marks corresponding to the design and manufacturing code should be made at appropriate locations of each component. Packaging and transportation
Follow the provisions of GB/T13384.
8 Quality Assurance
The manufacturer should ensure that the parts of the yaw system supplied by the user can work normally within 24 months from the date of use under the condition of proper storage and correct use by the user, otherwise the manufacturer should provide free repair or replacement.2 Yaw drive
4.2.2.1 The structural forms of yaw drive are divided into: a) Motor drive
The yaw gear is driven by the yaw drive motor through the reducer; b) Hydraulic drive
The yaw gear is driven by the hydraulic motor through the reducer. 4.2.2.2 Selection and design of yaw drive: The yaw drive motor, hydraulic motor and reducer can be selected and designed according to needs, but they should comply with relevant national standards and shall not interfere with other subsystems of the wind turbine generator set. 4.2.2.3 The yaw motor should use a three-phase AC motor with a protection level not less than IP54. 4.2.2.4 The yaw reducer can use a planetary reducer or a worm gear and planetary reducer in series. 4.2.2.5 The yaw drive requires smooth starting, uniform rotation speed and no vibration. 4.2.3 Yaw brake
4.2.3.1 Structural form
The yaw brake should use a caliper disc brake. The following forms are available: a) Normally closed caliper brake
The brake is clamped by springs and released by electric or hydraulic drag to achieve damped yaw and fail-safe. b) Normally open caliper brake
The brake should be clamped by high pressure during braking and clamped by low pressure during yaw to achieve damped yaw. When this form is adopted, there should be a self-locking link in the yaw transmission chain.
4.2.3.2 Strength calculation
The design calculation of the yaw brake is carried out in accordance with the yaw brake part of JB/T10300. 4.2.3.3 Brake caliper
The brake caliper consists of a brake caliper body and a brake pad. For grid-connected wind turbines, the number of brake calipers shall not be less than 2. The brake caliper body shall be fixed to the frame with high-strength bolts with sufficient torque. The brake pad shall be made of special friction material. For the technical requirements of friction materials, please refer to JB/T3063. 4.2.3.4 Brake disc
The brake disc is generally annular and is usually located on the tower or the adapter between the tower and the nacelle, and should meet the following requirements: a) The brake disc material should have sufficient strength, rigidity and certain toughness; if welded, it should also have good weldability b) The connection and fixation of the brake disc should be firm and reliable, and fatigue damage should not occur during the service life: c) The surface roughness of the brake disc should reach R.=3.2um. 3
JB/T 10425.1—2004
4.2.3.5 Brake spring
Should comply with the provisions of GB/T1239.4 or GB/T1972. 4.2.3.6 Brake performance requirements
Brake performance should meet the following requirements:
Rated braking torque value should not be less than the design value: a)
b) During yaw, the damping torque should remain stable, with a deviation of less than 5% from the design value; there should be no abnormal noise during braking.
4.2.3.7 Brake accuracy requirements
Brake accuracy should meet the following requirements:
a) The surface roughness of the assembly surface between the brake and the frame should meet the Ra=3.2um standard; b) The assembly clearance between the periphery of the brake pad and the brake caliper body should not be greater than 0.5mm at any point. 4.2.4 Bolt connection
All connecting bolts should be subjected to ultimate load and fatigue load strength calculations, and the material data used in the calculations should be selected according to relevant national standards. All high-strength bolts, nuts and washers for steel structures should comply with the provisions of GB/T1228, GB/T1229 and GB/T1230 respectively. 4.2.5 Surface treatment
The surface treatment of each component should be able to adapt to the working environment requirements of the wind turbine generator set. 4.3 Hydraulic system
The hydraulic system should meet the following requirements:
a) The hydraulic pipeline should be made of seamless steel pipe, and the flexible pipeline connection part is required to be made of suitable high-pressure hose. The screw pipe pipeline connection assembly should be tested to show that it can ensure the required sealing and withstand the dynamic loads occurring during operation; the design, selection and layout of hydraulic components should comply with the requirements of relevant regulations on hydraulic systems: b)
c) The hydraulic system pipeline should be kept clean and have good anti-oxidation performance: d) The hydraulic system should be well sealed and free of leakage. 5 Inspection items and rules
5.1 Appearance inspection
The yaw system should be installed and connected correctly, in accordance with the requirements of the drawing process and technical standards: The surface is required to be clean and free of dirt, rust and damage. The machined surface shall not have defects such as flash, burrs, sand holes, welding spots, oxide scale, etc. The weld seam must be uniform and free of cracks, bubbles, slag inclusions, undercuts, etc.
5.2 Calibration of the wing for geographic orientation detection
The geographic orientation detection device should be calibrated during the commissioning phase of the wind turbine generator set, and the error must be less than 5°. 5.3 Yaw action test
The forward and reverse rotations must be smooth and free of abnormal noise or vibration. 5.4 Yaw speed test
The deviation between the actual average speed and the design rated value must not exceed 5% 5.5 Yaw positioning accuracy test
The maximum deviation between the rotor axis and the wind direction must not exceed 5° after the action is completed. 5.6 Yaw damping test
Requires that the deviation between the actual total damping torque and the design rated value does not exceed 5%5.7 Yaw braking torque test
Requires that the actual total braking torque value is not less than the design rated value. 5.8 Cable release test
Test the initial cable release, ultimate cable release and cable twist protection respectively, and require the action to be accurate and reliable without malfunction. 4
5.9 Test method
Perform in accordance with JB/T10425.2.
5.10 Judgment criteria
IB/T 10425.1--2004
The inspection items specified in the yaw system require 100% to be carried out. For the inspection items that do not meet the specified requirements, the yaw system of the tested unit needs to be debugged until the test items meet the requirements of this standard; if the specified requirements are still not met after debugging, it is judged as unqualified. 6 Marking
The main components of the yaw system should have a factory nameplate, which should generally include: manufacturer name and registered trademark;
b) product name and model;
factory number;
d) manufacturing date:
implementation standard number.
Other permanent marks corresponding to the design and manufacturing code should be made at appropriate locations of each component. Packaging and transportation
Follow the provisions of GB/T13384.
8 Quality Assurance
The manufacturer should ensure that the parts of the yaw system supplied by the user can work normally within 24 months from the date of use under the condition of proper storage and correct use by the user, otherwise the manufacturer should provide free repair or replacement.2 Yaw drive
4.2.2.1 The structural forms of yaw drive are divided into: a) Motor drive
The yaw gear is driven by the yaw drive motor through the reducer; b) Hydraulic drive
The yaw gear is driven by the hydraulic motor through the reducer. 4.2.2.2 Selection and design of yaw drive: The yaw drive motor, hydraulic motor and reducer can be selected and designed according to needs, but they should comply with relevant national standards and shall not interfere with other subsystems of the wind turbine generator set. 4.2.2.3 The yaw motor should use a three-phase AC motor with a protection level not less than IP54. 4.2.2.4 The yaw reducer can use a planetary reducer or a worm gear and planetary reducer in series. 4.2.2.5 The yaw drive requires smooth starting, uniform rotation speed and no vibration. 4.2.3 Yaw brake
4.2.3.1 Structural form
The yaw brake should use a caliper disc brake. The following forms are available: a) Normally closed caliper brake
The brake is clamped by springs and released by electric or hydraulic drag to achieve damped yaw and fail-safe. b) Normally open caliper brake
The brake should be clamped by high pressure during braking and clamped by low pressure during yaw to achieve damped yaw. When this form is adopted, there should be a self-locking link in the yaw transmission chain.
4.2.3.2 Strength calculation
The design calculation of the yaw brake is carried out in accordance with the yaw brake part of JB/T10300. 4.2.3.3 Brake caliper
The brake caliper consists of a brake caliper body and a brake pad. For grid-connected wind turbines, the number of brake calipers shall not be less than 2. The brake caliper body shall be fixed to the frame with high-strength bolts with sufficient torque. The brake pad shall be made of special friction material. For the technical requirements of friction materials, please refer to JB/T3063. 4.2.3.4 Brake disc
The brake disc is generally annular and is usually located on the tower or the adapter between the tower and the nacelle, and should meet the following requirements: a) The brake disc material should have sufficient strength, rigidity and certain toughness; if welded, it should also have good weldability b) The connection and fixation of the brake disc should be firm and reliable, and fatigue damage should not occur during the service life: c) The surface roughness of the brake disc should reach R.=3.2um. 3
JB/T 10425.1—2004
4.2.3.5 Brake spring
Should comply with the provisions of GB/T1239.4 or GB/T1972. 4.2.3.6 Brake performance requirements
Brake performance should meet the following requirements:
Rated braking torque value should not be less than the design value: a)
b) During yaw, the damping torque should remain stable, with a deviation of less than 5% from the design value; there should be no abnormal noise during braking.
4.2.3.7 Brake accuracy requirements
Brake accuracy should meet the following requirements:
a) The surface roughness of the assembly surface between the brake and the frame should meet the Ra=3.2um standard; b) The assembly clearance between the periphery of the brake pad and the brake caliper body should not be greater than 0.5mm at any point. 4.2.4 Bolt connection
All connecting bolts should be subjected to ultimate load and fatigue load strength calculations, and the material data used in the calculations should be selected according to relevant national standards. All high-strength bolts, nuts and washers for steel structures should comply with the provisions of GB/T1228, GB/T1229 and GB/T1230 respectively. 4.2.5 Surface treatment
The surface treatment of each component should be able to adapt to the working environment requirements of the wind turbine generator set. 4.3 Hydraulic system
The hydraulic system should meet the following requirements:
a) The hydraulic pipeline should be made of seamless steel pipe, and the flexible pipeline connection part is required to be made of suitable high-pressure hose. The screw pipe pipeline connection assembly should be tested to show that it can ensure the required sealing and withstand the dynamic loads occurring during operation; the design, selection and layout of hydraulic components should comply with the requirements of relevant regulations on hydraulic systems: b)
c) The hydraulic system pipeline should be kept clean and have good anti-oxidation performance: d) The hydraulic system should be well sealed and free of leakage. 5 Inspection items and rules
5.1 Appearance inspection
The yaw system should be installed and connected correctly, in accordance with the requirements of the drawing process and technical standards: The surface is required to be clean and free of dirt, rust and damage. The machined surface shall not have defects such as flash, burrs, sand holes, welding spots, oxide scale, etc. The weld seam must be uniform and free of cracks, bubbles, slag inclusions, undercuts, etc.
5.2 Calibration of the wing for geographic orientation detection
The geographic orientation detection device should be calibrated during the commissioning phase of the wind turbine generator set, and the error must be less than 5°. 5.3 Yaw action test
The forward and reverse rotations must be smooth and free of abnormal noise or vibration. 5.4 Yaw speed test
The deviation between the actual average speed and the design rated value must not exceed 5% 5.5 Yaw positioning accuracy test
The maximum deviation between the rotor axis and the wind direction must not exceed 5° after the action is completed. 5.6 Yaw damping test
Requires that the deviation between the actual total damping torque and the design rated value does not exceed 5%5.7 Yaw braking torque test
Requires that the actual total braking torque value is not less than the design rated value. 5.8 Cable release test
Test the initial cable release, ultimate cable release and cable twist protection respectively, and require the action to be accurate and reliable without malfunction. 4
5.9 Test method
Perform in accordance with JB/T10425.2.
5.10 Judgment criteria
IB/T 10425.1--2004
The inspection items specified in the yaw system require 100% to be carried out. For the inspection items that do not meet the specified requirements, the yaw system of the tested unit needs to be debugged until the test items meet the requirements of this standard; if the specified requirements are still not met after debugging, it is judged as unqualified. 6 Marking
The main components of the yaw system should have a factory nameplate, which should generally include: manufacturer name and registered trademark;
b) product name and model;
factory number;
d) manufacturing date:
implementation standard number.
Other permanent marks corresponding to the design and manufacturing code should be made at appropriate locations of each component. Packaging and transportation
Follow the provisions of GB/T13384.
8 Quality Assurance
The manufacturer should ensure that the parts of the yaw system supplied by the user can work normally within 24 months from the date of use under the condition of proper storage and correct use by the user, otherwise the manufacturer should provide free repair or replacement.2.3.5 Brake springs
Should comply with the provisions of GB/T1239.4 or GB/T1972. 4.2.3.6 Brake performance requirements
Brake performance should meet the following requirements:
Rated braking torque value should not be less than the design value: a)
b) During yaw, the damping torque should remain stable, with a deviation of less than 5% from the design value; there should be no abnormal noise during braking.
4.2.3.7 Brake accuracy requirements
Brake accuracy should meet the following requirements:
a) The surface roughness of the assembly surface between the brake and the frame should meet the Ra=3.2um standard; b) The assembly clearance between the periphery of the brake pad and the brake caliper body should not be greater than 0.5mm at any point. 4.2.4 Bolt connection
All connecting bolts should be subjected to ultimate load and fatigue load strength calculations, and the material data used in the calculations shall be selected in accordance with relevant national standards. All high-strength bolts, nuts and washers of steel structures shall comply with the provisions of GB/T1228, GB/T1229 and GB/T1230 respectively. 4.2.5 Surface treatment
The surface treatment of each component shall be able to adapt to the working environment requirements of the wind turbine generator set. 4.3 Hydraulic system
The hydraulic system shall meet the following requirements:
a) Hydraulic pipelines shall be made of seamless steel pipes, and the flexible pipeline connection parts shall be made of suitable high-pressure hoses. The screw pipe pipeline connection components shall be tested to show that they can ensure the required sealing and withstand the dynamic loads occurring during operation; the design, selection and layout of hydraulic components shall comply with the requirements of relevant regulations on hydraulic systems: b)
c) The hydraulic system pipelines shall be kept clean and have good anti-oxidation properties: d) The hydraulic system shall be well sealed and leak-free. 5 Inspection items and rules
5.1 Appearance inspection
The yaw system should be installed and connected correctly, in accordance with the requirements of the drawing process and technical standards: The surface should be clean and free of dirt, rust and damage. The machined surface should not have defects such as flash, burrs, sand holes, welding spots, oxide scale, etc. The weld should be uniform and free of cracks, bubbles, slag inclusions, meat biting, etc.
5.2 Calibration of the wing of the geographic orientation detection
The geographic orientation detection device should be calibrated during the commissioning stage of the wind turbine generator set, and the error should be less than 5°. 5.3 Yaw action test
It is required that the forward and reverse rotations are smooth and there should be no abnormal noise or vibration. 5.4 Yaw speed test
It is required that the deviation between the actual average speed and the design rated value does not exceed 5%5.5 Yaw positioning accuracy test
It is required that after the action is completed, the maximum deviation between the wind rotor axis and the wind direction is not more than 5°. 5.6 Yaw damping test
Requires that the deviation between the actual total damping torque and the design rated value does not exceed 5%5.7 Yaw braking torque test
Requires that the actual total braking torque value is not less than the design rated value. 5.8 Cable release test
Test the initial cable release, ultimate cable release and cable twist protection respectively, and require the action to be accurate and reliable without malfunction. 4
5.9 Test method
Perform in accordance with JB/T10425.2.
5.10 Judgment criteria
IB/T 10425.1--2004
The inspection items specified in the yaw system require 100% to be carried out. For the inspection items that do not meet the specified requirements, the yaw system of the tested unit needs to be debugged until the test items meet the requirements of this standard; if the specified requirements are still not met after debugging, it is judged as unqualified. 6 Marking
The main components of the yaw system should have a factory nameplate, which should generally include: manufacturer name and registered trademark;
b) product name and model;
factory number;
d) manufacturing date:
implementation standard number.
Other permanent marks corresponding to the design and manufacturing code should be made at appropriate locations of each component. Packaging and transportation
Follow the provisions of GB/T13384.
8 Quality Assurance
The manufacturer should ensure that the parts of the yaw system supplied by the user can work normally within 24 months from the date of use under the condition of proper storage and correct use by the user, otherwise the manufacturer should provide free repair or replacement.2.3.5 Brake springs
Should comply with the provisions of GB/T1239.4 or GB/T1972. 4.2.3.6 Brake performance requirements
Brake performance should meet the following requirements:
Rated braking torque value should not be less than the design value: a)
b) During yaw, the damping torque should remain stable, with a deviation of less than 5% from the design value; there should be no abnormal noise during braking.
4.2.3.7 Brake accuracy requirements
Brake accuracy should meet the following requirements:
a) The surface roughness of the assembly surface between the brake and the frame should meet the Ra=3.2um standard; b) The assembly clearance between the periphery of the brake pad and the brake caliper body should not be greater than 0.5mm at any point. 4.2.4 Bolt connection
All connecting bolts should be subjected to ultimate load and fatigue load strength calculations, and the material data used in the calculations shall be selected in accordance with relevant national standards. All high-strength bolts, nuts and washers of steel structures shall comply with the provisions of GB/T1228, GB/T1229 and GB/T1230 respectively. 4.2.5 Surface treatment
The surface treatment of each component shall be able to adapt to the working environment requirements of the wind turbine generator set. 4.3 Hydraulic system
The hydraulic system shall meet the following requirements:
a) Hydraulic pipelines shall be made of seamless steel pipes, and the flexible pipeline connection parts shall be made of suitable high-pressure hoses. The screw pipe pipeline connection components shall be tested to show that they can ensure the required sealing and withstand the dynamic loads occurring during operation; the design, selection and layout of hydraulic components shall comply with the requirements of relevant regulations on hydraulic systems: b)
c) The hydraulic system pipelines shall be kept clean and have good anti-oxidation properties: d) The hydraulic system shall be well sealed and leak-free. 5 Inspection items and rules
5.1 Appearance inspection
The yaw system should be installed and connected correctly, in accordance with the requirements of the drawing process and technical standards: The surface should be clean and free of dirt, rust and damage. The machined surface should not have defects such as flash, burrs, sand holes, welding spots, oxide scale, etc. The weld should be uniform and free of cracks, bubbles, slag inclusions, meat biting, etc.
5.2 Calibration of the wing of the geographic orientation detection
The geographic orientation detection device should be calibrated during the commissioning stage of the wind turbine generator set, and the error should be less than 5°. 5.3 Yaw action test
It is required that the forward and reverse rotations are smooth and there should be no abnormal noise or vibration. 5.4 Yaw speed test
It is required that the deviation between the actual average speed and the design rated value does not exceed 5%5.5 Yaw positioning accuracy test
It is required that after the action is completed, the maximum deviation between the wind rotor axis and the wind direction is not more than 5°. 5.6 Yaw damping test
Requires that the deviation between the actual total damping torque and the design rated value does not exceed 5%5.7 Yaw braking torque test
Requires that the actual total braking torque value is not less than the design rated value. 5.8 Cable release test
Test the initial cable release, ultimate cable release and cable twist protection respectively, and require the action to be accurate and reliable without malfunction. 4
5.9 Test method
Perform in accordance with JB/T10425.2.
5.10 Judgment criteria
IB/T 10425.1--2004
The inspection items specified in the yaw system require 100% to be carried out. For the inspection items that do not meet the specified requirements, the yaw system of the tested unit needs to be debugged until the test items meet the requirements of this standard; if the specified requirements are still not met after debugging, it is judged as unqualified. 6 Marking
The main components of the yaw system should have a factory nameplate, which should generally include: manufacturer name and registered trademark;
b) product name and model;
factory number;
d) manufacturing date:
implementation standard number.
Other permanent marks corresponding to the design and manufacturing code should be made at appropriate locations of each component. Packaging and transportation
Follow the provisions of GB/T13384.
8 Quality Assurance
The manufacturer should ensure that the parts of the yaw system supplied by the user can work normally within 24 months from the date of use under the condition of proper storage and correct use by the user, otherwise the manufacturer should provide free repair or replacement.
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