JB/T 9740.3-1999 This standard is a revision of NJ 423-86 "Technical Conditions for Low-speed Wind Turbines". The revised technical content has been greatly changed. This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and other requirements for low-speed wind turbines. This standard is applicable to horizontal axis wind turbines with a blade tip speed ratio of less than 2. This standard was first issued on July 30, 1986. JB/T 9740.3-1999 Technical Conditions for Low-speed Wind Turbines JB/T9740.3-1999 Standard download decompression password: www.bzxz.net

[5C27.180
Machinery Industry Standard of the People's Republic of China
JB/T9740.1-9740.4-1999
Low speed wind turbine
Low speed wind energy conversion system1999-08-06 Issued
State Machinery Industry Bureau
2000-01-01 Implementation
JB/T9740.3-1999
The standard is a revision of "N423-86 Low speed wind turbine, technical parts". Seven revised requirements: Reference standards JB2759-80 and 1/73-8 have been invalidated and replaced by GB13384-1992 and GB15673-1999 respectively: 1.1.4, 1.6, 1.10, 1.1.11, 1.3.1.4, 1.3.1.5 and 1.4 of the original standard are cancelled; 3.1.9 is changed to "the maximum wind resistance of the wind turbine is 40m8"; 4.21 is changed to "the wind turbine should be stable and reliable in direction adjustment, and there should be no swaying after turning"; 5.24 is changed to "the wind turbine should be stable and reliable in direction adjustment, and there should be no swaying after turning"; 6.3.4 is added as the reduction test method; 7.4.5 is added as the inspection rules are newly compiled. This standard is part of the J9740 series of standards for low headwind turbines. This series of standards includes the following four parts: JB.T974C.1-1999 Low-speed wind turbine series JB.T9740.2-1999 Low-speed wind turbine types and basic parameters JB/T9740.3-1999 Technical conditions for low-speed wind turbines JB.T974G.4-1999 Installation specifications for low-speed wind turbines This standard will replace NJ423-86 from the date of implementation. This standard is submitted and approved by the National Technical Committee for Standardization of Wind Machinery. The originating units of this standard are: Shangdu County Animal Husbandry Machinery Factory, Huhhot Animal Husbandry Machinery Research Institute; the main drafters of this standard are: Zhang Hongjie, Bai Zhile. This standard was first issued on July 30, 1986. Scope
Wind turbine industry standard of the People's Republic of China
Technical specifications for law speed wind turbines
Technical specifications for law speed wind turbines in reverse conversion systemJB/T9740.3—1999
423—86
This standard specifies the technical requirements, test methods, inspection rules, and marking, packaging, and operation requirements for low speed wind turbines. This standard is applicable to horizontal wind turbines with a power ratio of less than 2. 2 Referenced standards
The following standards contain the relevant provisions, which constitute the provisions of this standard through reference in this standard. The versions shown in the publication date of this standard are valid. All standards will be revised. Parties using this standard should consider the feasibility of using the following new versions of the standard: GB/T 9BB GB:1184—1996 1800-1998 GBP2828—1987 GB/T:3384-1992 JB/T 5673--1991 JB/T 9740.1-1999 JB/T J0J37—1999
3 Technical requirements
3.1 General technical requirements
Gas welding, industrial electric welding and gas shielded coal welding Basic types and dimensions of welds Shape and position tolerances Unnoted tolerance values
Limits and fit basis Part 3; Standard deviation Basic deviation numerical table Batch inspection Count sampling procedure Polymer sampling table (applicable to reverse batch inspection) General technical conditions for packaging of electromechanical products
Technical conditions for painting of agricultural and forestry machinery and equipment High-speed wind turbine series
Test methods for small wind turbines for water lifting and power generation 3.1.1 Wind turbines should meet the requirements of public standards and be braked according to the drawings and technical specifications approved in the prescribed procedures. 3.2α The machine should be able to operate at an ambient temperature of -40℃-+40℃ 3.1.3 The wind turbine must have automatic stop and manual parking, 3.1.4 The wind turbine head must not leak oil. 3.1.5 The exposed parts and exposed surfaces must be anti-rust and anti-marking (such as galvanizing, bluing, spraying, etc.) according to the use requirements. 3.1.6 The coating of parts should comply with the 1-2-2- specified in Table 1 of JB Hall 5673-1991. 3.1. The coal connection parts shall comply with the provisions of GB/T985. 3.,8 When used under normal 7 working conditions, the first trouble-free operation time of the wind turbine shall not be less than 1OUUh. 3.1.9 The wind turbine shall be able to withstand high wind volume and high wind speed = 40m. 3.2 Semi-required technical requirements 3.2.1 The wind turbine starts. 1 The wind speed is V, 4m/s. 3. 2. 2.1 Operating speed range of wind turbines
Approved by the State Bureau of Machinery Industry in 19006
2000.01-01 Verified
Lower value: not more than 4m's;
Upper value: not less than 18m/s
3.2.3 Maximum wind energy utilization coefficient
.1 Japan/T9740.3-1999
3.2, 3.1 The maximum wind energy utilization coefficient of the plate should not be less than 0.3. 3.2.3.2 Maximum wind energy utilization coefficient of the flat plate The number should not be less than 0.25. 3.2.4 The wind turbine is calibrated to ensure that there is no swing after adjustment. 3.3 Technical requirements for main components 3.3. Wind rotor 3.3.1.1 The diameter of the wind rotor shall comply with the provisions of B/T9740.1. 3.3.1.2 The tolerance of the wind rotor diameter shall comply with the provisions of GAT1R0).3. When the diameter is greater than 3150mm, it shall be calculated according to formula (1): 10.004D+2.1 Formula: ... tolerance unit, m
is .... Wind rotor diameter, mm.
3.3.1.3 The axial runout tolerance of the wind wheel blade tip is 0.01D; the radial runout tolerance of the wind wheel blade tip is 0.005D. 3.3.1.4 The wheels should be statically balanced, and the static balance accuracy should reach G6303.3.1.5 The blade line angle error is ±303.3.2 Rotating rest
3.3.2.1 The rotation of the rotating body should be reliable, and there should be no jamming. 3.3.2.2 The coaxiality of the holes at both ends of the rotating rest shall meet the 8th grade specified in GB/T11B4. 3.3.3 Tower
The height of the tower frame meets the requirements of B/T740.1
3.4 ​​Technical requirements for general assembly
3.4.! All parts must be certified! Installation can only be carried out after inspection by the internal inspection department. Outsourced parts must hold a certificate of conformity and can be installed after random inspection.
3.4.2 The fan shall be within the working wind speed range and shall not have vibrations that affect the overall operation of the whole machine, abnormal noises and other irregularities. 3.4.3 All connectors and fasteners must be firmly connected and reliably, and shall be treated with rust prevention. 4 Test method
The test method shall comply with the provisions of 10.
5 Inspection rules
5.1 Definition of defects
Any inspected item that does not meet the quality indicators specified in the technical requirements is called a defect. 5.2 Defect classification
According to the degree of impact on the product, it is divided into two categories: major defects and minor defects. Major defects are divided into two groups, A and B. See Table 1 for defect classification. 10
JD/T 9740.31999
Table 1 Defect classification
Description
Effective system collection
Manual parking time
First trouble-free operation time
Start working
Wind treatment diameter
Wheel shaft movable
Wind dry light direction movement
Wind dry static balance
Leaf and safety angle design
1 Operation upper limit
T Operation temperature
Directional stability
Current performance
5.3 This standard adopts G B/T2828 stops the routine inspection sampling plan and stipulates the general inspection level II, see Table 2. Inspection tray N-2~8 sets
Table 2 Sampling judgment plan
Classification
Number of items
Classification
Selection code
Number of samples
5.5 Determination rule
Defects
When the number of defects in the inspected group is small or equal to the combined determination number, the whole batch of products is judged to be qualified: when the number of defects in any one or more groups in the inspected group is greater than or equal to the combined determination number, the whole product is judged to be unqualified. I
6 Marking, packaging, transportation
JE/T9740.3—1999
6.1 Each wind turbine shall be marked, and the marking shall include the following contents: a) Manufacturer name:
b) Product name and model: bZxz.net
) Product basic technical specifications:
d) Product factory number;
e) Product factory date.
6.2 Wind turbines shall be marked
6.3 Wind turbine packaging shall comply with GBT13384.6.4 Wind turbines shall be shipped in accordance with the relevant regulations of the transportation department and ensure that the parts are not damaged during the transportation. 6. Spare parts and tools accompanying the product shall be complete. 6 Technical documents of the same product shall be included
E) Packing list:
b) Inspection certificate;
c) Safety instructions.
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