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标准编号: QC/T 777-2017 (QC/T777-2017)
中文名称: 汽车电磁风扇离合器技术条件
英文名称: The technical conditions of electromagnetic fan clutch for automobile
行业: 汽车行业标准 (推荐)
中标分类: T14
字数估计: 18,163
发布日期: 2017-04-12
实施日期: 2017-10-01
旧标准 (被替代): QC/T 777-2007
起草单位: 龙口中宇汽车风扇离合器有限公司
标准依据: 工业和信息化部公告2017年第14号

QC/T 777-2017: 汽车电磁风扇离合器技术条件
QC/T 777-2017 英文名称: The technical conditions of electromagnetic fan clutch for automobile
中华人民共和国汽车行业标准
QC/T777—2017
代替QC/T 777-2007
汽车电磁凤扇离合器技术条件
中华人民共和国工业和信息化部发布
1 范围
本标准规定汽车用电磁风扇离合器(以下简称电磁离合器)的技术要求、试验方法、检验规则、标
志、包装、运输和贮存。
本标准适用于汽车用电磁离合器,该产品主要用于汽车发动机冷却系统中;与其他用途内燃机
配套的电磁离合器可参照使用。
2 规范性引用文件
下列文件对于本标准的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本 标准。
凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本标准。
3 术语和定义
下列术语和定义适用于本标准。
4 电磁风扇离合器分类
4.1 按结构分为有电刷和无电刷两种型式。
4.2 按工作挡位分为单级和多级两种。
4.3 按额定电压分为12 V 和24 V 两种电压规格。
5 技术要求
5.1 一般要求
5.1.1 产品应按规定程序批准的产品图样和技术文件制造,且满足本标准的规定。
5.1.2 电磁离合器产品图样和技术文件中应规定:产品型号、额定电压、初期静摩擦扭矩、电器组 件的性能参数、
旋转方向和机械紧固件的拧紧力矩等。
5.1.3 产品不允许有影响使用性能的缺陷,电磁离合器中各零部件不允许有毛刺、损伤、锈蚀、裂纹 等缺陷。
5.1.4 产品用电线束应符合 QC/T 29106 中规定。
5.2 基本性能
5.2.1 动平衡。
电磁离合器中各旋转零部件动不平衡量不大于0.1M(g ·mm) (其中M 为无量纲量,其值为电磁 离合器旋转零
部件以克为单位的质量数)。
5.2.2 静摩擦扭矩。
5.2.2.1 初期静摩擦扭矩。
电磁离合器在常温额定电压下工作,驱动盘与从动盘在规定的吸合间隙下吸合后所能传递的扭 矩,其扭矩值
应符合图样和技术条件中规定。
5.2.2.2 磨合后静摩擦扭矩。
电磁离合器在常温额定电压、配装标定风扇及额定转速的条件下连续工作,驱动盘与从动盘在 规定的吸合间
隙下循环吸合、分离后所能传递的扭矩,其扭矩值应不低于额定驱动功率所需扭矩值 的1.5倍。
5.2.3 工作电压范围。
a) 额定电压为12V 的电磁离合器工作电压范围为:9.8 V~16 V;
b) 额定电压为24 V 的电磁离合器工作电压范围为:19.6 V~32V。 在上述工作电压范围内,电磁离合器应能正常工作。
5.2.4 吸合间隙。
电磁离合器的吸合间隙应符合图样和技术条件中规定。
5.2.5 转 速 特 性 。
转速特性应在配装风扇的条件下进行,无特殊规定时应满足叶片长度与风扇直径的比例: >0.26:1,见图1。
5.2.5.1 单级电磁离合器的转速特性曲线如图2所示,图中Na 为风扇与驱动盘的同步转速,Na 为风扇与驱动盘的随动转速。
5.2.5.2 多级电磁离合器的转速特性曲线,如图3所示。以多级电磁离合器为例,Nn 为风扇与驱 动盘的同步转速;
Ng 为风扇与驱动盘的转差转速,在驱动盘指定工作转速NR 下,差速运行时风扇转 差转速 Nzk 不得小于驱动盘工
作转速Na 的55%(可与客户商定);Ns 为风扇与驱动盘的随动转速。
5.2.5.3工作电压范围内,驱动盘与从动盘应吸合正常,摩擦传动应无滑动转差。
5.2.6 吸合电压。
5.2.6.1 驱动盘与从动盘的吸合间隙应在图样和技术条件规定内,于(23士5)℃环境温度中,在不 超过81.7%的额定电压时能正常工作。
5.2.6.2驱动盘与从动盘的吸合间隙应在图样和技术条件规定内,于(23±5)℃环境中连续工作达 到热平衡状态(即表面温度于1min 内变化≤1℃)后,在不超过81.7%的额定电压时能正常工作。
5.2.6.3 吸合间隙比图样和技术条件中规定的上限值增大50%时,吸合电压应不大于95%的额定电压。
5.2.7 分离电压。
额定电压条件下,保持吸合状态15 min 后,使驱动盘与从动盘分离时的电压,应符合技术图样
中相关规定。
5.2.8 绝缘性能。
5.2.8.1 绕组线圈对地绝缘电阻不得小于10 MQ。
5.2.8.2 绕组线圈对地绝缘耐压性能应具备承受50 Hz 、550V 正弦交流电压能力,耐压1 min 无 击穿现象。
5.2.9 绝缘耐热性能。
电磁离合器电气组件的绝缘耐热性不得低于F 级,绕组线圈温升不大于65 ℃。
5.2.10 电磁辐射抗扰特性。
电磁离合器电气组件的电磁辐射抗干扰性应符合GB/T 17619 的有关规定。 5.2.11 电磁骚扰特性。
电磁离合器电气组件的电磁骚扰特性应符合GB 18655 的有关规定。
5.2.12 耐振动性能。
电磁离合器组件应能承受X、Y、Z三个方向的扫频振动试验,每个方向试验时间8 h。振动试验后 零部件无损坏、
变形,紧固件无松动,电接点、导体绝缘状态完好,其性能应符合5.2.2和5.2.4的规定。
5.2.13 耐温性能。
电磁离合器的耐温性能试验结束后扭矩应符合5.2.2的有关规定。
5.2.14 超速性能。
按6.14规定的方法进行试验后,零部件应无损伤、变形;性能应符合5.1.2和5.1.3的规定。
5.2.15 表面防护性能。
5.2.15.1 电磁离合器由黑色金属制造的外露部分(摩擦零件除外),依据 QC/T 625—2013规定涂 镀防腐蚀保护层。
5.2.15.2 涂镀和化学处理件的外观不得低于JB/T 4159 中2.4.1规定的电镀和化学处理件外观 质量分级方法的二级要求。
5.2.16 耐盐雾性能。
应按照 QC/T413 中3.13的规定进行盐雾试验,试验时间为96 h。试验后,由黑色金属制造的 外露零部件(摩擦零件除外)不应出现腐蚀金属母体的现象。
5.2.17 防水性能。
应满足 GB/T 4942.1和 GB/T4942.2 中第二位表征数字-IPX4 中规定。试验结束后,其性能应符合5.2.2、5.2.8和5.2.15中规定。
防尘性能试验结束后,各密封件内应无沙尘侵入现象,旋转零部件应无干涉、卡滞等现象,其性 能应符合5.2.2和5.2.4中规定。
5.3 耐久性
电磁离合器应能承受1.0×10⁵次的循环试验,用户可选用200000 km 道路试验。试验后应能 正常工作,绕组的绝缘电阻应大于1MQ。
5.4 转动惯量
按6.20中规定进行,其结果应满足客户要求。
6 试验方法
6.1 动平衡试验
6.1.1 将电磁离合器各旋转零部件分别安装在动平衡机上,驱动旋转体组件进行测试,各旋转零部 件的不平衡量应符合5.2.1中规定。
6.1.2 动平衡机精度要求:最小可达剩余不平衡量不大于0.3g*mm ·kg⁻¹。
6.2.1 初期静摩擦扭矩。
电磁离合器在常温下,绕组线圈接通规定的额定电压,用精度不低于2.5级的扭矩仪检测静摩 擦扭矩值。
6.2.2 磨合后静摩擦扭矩。
电磁离合器经磨合,达到最大扭矩值稳定后的静摩擦扭矩值。
6.3 工作电压波动对转速的影响检测
电磁离合器总成安装在台架上驱动着风扇运行,调整绕组中电压波动在规定范围内,对单级电 磁离合器分别测量驱动盘和风扇转速;对多级电磁离合器分别测量驱动盘、从动盘和风扇转速。
6.4 吸合间隙检测
用量检具对电磁离合器驱动盘与从动盘之间的吸合间隙进行测量,测量时应3次转动从动盘, 使其与驱动盘处于3个不同位置,并取3次结果的平均值。
6.5 转速特性测试
6.5.2 试验用直流电源精度等级:1.0级,输出阻抗不得大于0.001 Ω。
6.6 吸合电压测试
6.6.1 电源电压设定在额定电压的81.7%,检测电磁离合器的吸合状态。
6.6.2 电源电压设定在额定电压的81.7%,检测电磁离合器达到热平衡状态后的吸合状态。
6.6.3 调整电磁离合器吸合间隙比上限值增大50%,电源电压设定为额定电压的95%,检测其吸 合状态。
6.7 分离电压测试
在额定电压条件下保持吸合状态15 min,下调电压到技术图样中规定电压,检测驱动盘与从动 盘的分离状态。
6.8 绝缘性能试验
6.8.1 绝缘电阻测试。
绕组线圈对地绝缘耐压试验按QC/T413 中4.8.1中规定进行。
6.9 温升测试
电磁离合器的绕组线圈温升试验按QC/T 413 中4.3的规定进行。
6.10 电磁辐射抗扰性试验
电磁离合器组件的电磁辐射抗扰性试验按GB/T 17619 的有关规定进行。
6.11 电磁骚扰性试验
电磁离合器组件的电磁骚扰性试验按GB18655 的有关规定进行,电磁离合器为吸合状态。
6.12 振动试验
6.12.1 振动试验中产品及检测点的安装位置应按图4进行。
进行。试验过程中需加装风扇,所匹配的风扇参数应满足技术图样中的技术要求。

QC/T 777-2017
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.060.30
T 14
Replacing QC/T 777-2007
The Technical Conditions of Electromagnetic Fan
Clutch for Automobile
ISSUED ON: APRIL 12, 2017
IMPLEMENTED ON: OCTOBER 01, 2017
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 7
1 Scope ... 8
2 Normative References ... 8
3 Terms and Definitions ... 9
4 Classification of Electromagnetic Fan Clutch ... 11
5 Technical Requirements ... 11
6 Test Methods ... 16
7 Inspection Rules ... 23
8 Marking, Packaging, Transportation and Storage ... 25
The Technical Conditions of Electromagnetic Fan
Clutch for Automobile
1 Scope
This Standard specifies the technical requirements, test methods, inspection rules,
markings, packaging, transportation and storage of electromagnetic fan clutch for
automobile (hereinafter referred to as electromagnetic clutch).
This Standard is applicable to electromagnetic clutch for automobile, which is mainly
used in engine cooling system of automobile; electromagnetic clutch used with other
internal combustion engines can be referred to.
2 Normative References
The following documents are essential to the application of this Standard. For the dated
documents, only the versions with the dates indicated are applicable to this Standard;
for the undated documents, only the latest version (including all the amendments) are
applicable to this Standard.
GB/T 191 Packaging – Pictorial Marking for Handling of Goods
GB/T 2423.37 Environmental Testing for Electric and Electronic Products - Part 2:
Test Methods - Test L: Dust and Sand
GB/T 2423.38 Environmental Testing for Electric and Electronic Products - Part 2:
Test Methods – Test R: Water Test Methods and Guidelines
GB/T 2828.1 Sampling Procedures for Inspection by Attribute – Part 1: Sampling
Schemes Indexed by Acceptance Quality Limit (AQL) For Lot-by-Lot Inspection
GB/T 12679 Motor Vehicles – Durability Running – Test Method
GB/T 13306 Plate
GB/T 13384 General Specifications for Packing of Mechanical and Electrical
Product
GB/T 17619 Limits and Methods of Testing for Immunity of Electrical / Electronic
Sub-Assemblies in Vehicles to Electromagnetic Radiation
GB/T 18655 Vehicles Boats and Internal Combustion Engines - Radio Disturbance
Characteristics - Limits and Methods of Measurement for the Protection of on-
Board Receivers
GB/T 4942.1 Degrees of Protection Provided by the Integral Design of Rotating
Electrical Machined (IP Code)-Classification
GB/T 4942.2 Low Voltage Electrical Enclosure Protection Class
JB/T 4159 General Technical Requirements of Electric Products for Tropical
Environment
QC/T 238 Storage and Preservation for Automotive Parts
QC/T 29106 Technical Specification of Low-Voltage Electric Harness for Motor
Vehicles
QC/T 413 Basic Technical Requirements for Automotive Electric Equipment
QC/T 625-2013 Metallic Coatings and Conversion Coatings for Automobiles
3 Terms and Definitions
For the purpose of this Standard, the following terms and definitions apply.
3.1 Engaged temperature
The temperature of the cooling medium when controlling the combination of
electromagnetic clutch driving disc with the driven disc.
3.2 Disengaged temperature
The temperature of the cooling medium when controlling the separation of the
electromagnetic clutch driving disc from the driven disc.
3.3 Engaged state
disc with the driven disc.
3.4 Disengaged state
At the disengaged temperature, the separated state of the electromagnetic clutch
driving disk from the driven disk.
3.5 Engaged gap
The distance between the driving disk and the driven disk when the electromagnetic
3.15 Disengaged voltage
When the circuit is on, the voltage when the electromagnetic clutch driving disc
disengages from the driven disc.
The electromagnetic clutch, by turning on/off a winding circuit, that combines or
separates the driving disc and the driven disc.
3.17 Multistage electromagnetic clutch
The electromagnetic clutch, control multiple sets of winding circuits on/off in order, that
realizes the multiple working states of the driving disc and driven disc, such as from
follow operation, non-synchronized operation to synchronized operation or stepwise
separation from the driving disc.
4 Classification of Electromagnetic Fan Clutch
4.1 It can be divided into two types of with and without brush according to the structure.
work shift.
4.3 It can be divided into two voltage specifications of 12V and 24V according to the
rated voltage.
5 Technical Requirements
5.1 General requirements
5.1.1 The product shall be manufactured according to the product drawings and
technical documents approved by the prescribed procedures, and shall conform to the
provisions of this Standard.
5.1.2 The product drawings and technical documents of the electromagnetic clutch
parameters of electrical components, rotation direction and tightening torque of
mechanical fasteners, etc.
5.1.3 The product is not allowed to have defects that affect the performance. The parts
of the electromagnetic clutch are not allowed to have defects such as burrs, damage,
rust, cracks, etc.
1min without breakdown.
5.2.9 Insulation heat resistance.
The insulation heat resistance of the electrical components of the electromagnetic
clutch must be no lower than Class F; and the temperature rise of the winding coil shall
5.2.10 Electromagnetic radiation immunity.
The electromagnetic radiation immunity of the electrical components of the
electromagnetic clutch shall conform to the relevant provisions of GB/T 17619.
5.2.11 Electromagnetic disturbance.
The electromagnetic disturbance of the electrical components of the electromagnetic
clutch shall conform to the relevant provisions of GB 18655.
5.2.12 Vibration resistance.
The electromagnetic clutch assembly shall be able to withstand the sweep frequency
vibration test in the three directions of X, Y, and Z; and the test time in each direction
not loose, and the electrical contacts and conductor insulation are intact. Their
performance shall conform to the provisions of 5.2.2 and 5.2.4.
5.2.13 Temperature resistance.
After the temperature resistance test of the electromagnetic clutch is completed, the
torque shall conform to the relevant provisions of 5.2.2.
5.2.14 Overspeed performance.
After testing in accordance with the method specified in 6.14, the parts shall be free of
damage and deformation; the performance shall conform to the provisions of 5.1.2 and
5.1.3.
5.2.15.1 The exposed part of the electromagnetic clutch (except the friction parts)
made of ferrous metal shall be coated with anti-corrosion protective layer according to
QC/T 625-2013.
5.2.15.2 The appearance of the coated and chemically treated parts shall be no lower
than the Class-2 requirements of the grading method for the appearance quality of
electroplated and chemically treated parts specified in 2.4.1 of JB/T 4159.
6.2.2 Static friction torque after pull-in.
After the electromagnetic clutch pull-in, it indicates the static friction torque value after
reaching the maximum torque value and keep stable.
The electromagnetic clutch assembly is installed on the platform and drives the fan to
run. The voltage fluctuation in the winding is adjusted to be within the specified range.
For the single stage electromagnetic clutch, separately measure the speed of driving
disc and fan. For the multistage electromagnetic clutch, separately measure the speed
of driving disc and driven disc and fan.
6.4 Detection of engaged gap
Use the gauge to measure the engaged gap between the driving disc and the driven
disc of the electromagnetic clutch. During the measurement, the driven disc shall be
rotated for 3 times so that it is at 3 different positions from the driving disc; and take
6.5 Speed characteristics test
6.5.1 Install the electromagnetic clutch on the performance test bench; and complete
the speed characteristics test according to the provisions in the product drawings and
technical requirements.
6.5.2 Accuracy level of DC power supply for test: Level-1.0, output impedance shall be
no greater than 0.001Ω.
6.6 Engaged voltage test
6.6.1 The power supply voltage is set at 81.7% of the rated voltage; and test the
engaged state of the electromagnetic clutch.
engaged state of the electromagnetic clutch after the thermal equilibrium is reached.
6.6.3 Adjust the engaged gap of the electromagnetic clutch to increase by 50% from
the upper limit; and set the power supply voltage to 95% of the rated voltage; and test
its engaged state.
6.7 Disengaged voltage test
Keep the engaged state for 15min at the rated voltage, decrease the voltage to the
voltage specified in the technical drawings; and test the separation state of the driving
disc and the driven disc.
The user shall perform the sampling inspection of the electromagnetic clutches in
and may also be resolved through consultation between the supplier and the purchaser.
7.3 Type inspection and determination rules
7.3.1 When the electromagnetic clutch has any of the following conditions, the
manufacturer shall perform type inspection:
a) When finalizing and identifying the new product;
b) When there are major changes in the design, process and materials of the
products after production, which affect the performance of the products;
c) Batch, mass-produced products no less than once every two years;
d) When production is resumed production after suspending for more than one year;
f) When the quality is unstable and deemed necessary to take the type inspection.
7.3.2 Type inspection shall be carried out in accordance with double sampling plan and
inspection level II specified in GB/T 2828.1.
7.3.3 Items, technical requirements and test methods for type inspection shall be
carried out in accordance with the provisions in Table 6.
7.3.4 The type inspection of the products shall all meet the requirements. If there are
the non-conforming items, double quantities of products are allowed to be taken for
the reinspection of the non-conforming items. If the reinspection is still disqualified,
then such batch of products shall be determined as disqualified. However, if the
disqualified.
8 Marking, Packaging, Transportation and Storage
8.1 Marking
8.1.1 Each electromagnetic clutch shall be provided with a durable nameplate fixed in
a prominent position, and the nameplate shall be marked with the following:
a) The name of the manufacturer;
b) Product model and name;
   
相关标准:  QC/T 999-2015  QC/T 907-2013
 
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