JB/T 11204

📋 Scope / 适用范围 ai_extracted

This standard specifies the terms and definitions, product classification, coding and model specification marking methods, technical requirements, inspection methods, inspection rules, marking, packaging, transportation, and storage of silicone oil fan clutches for internal combustion engines. This standard applies to silicone oil fan clutches that use thermostatic bimetallic sensing elements to automatically control the cooling fan speed in the cooling systems of air-cooled and liquid-cooled internal combustion engines.

📝 Foreword / 前言 ai_extracted

This standard was drafted in accordance with the rules given in GB/T 1.1—2009. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Internal Combustion Engine Standardization Technical Committee (SAC/TC177). Drafting organizations of this standard: Xuelong Group Co., Ltd., Changchai Co., Ltd., Shanghai Internal Combustion Engine Research Institute, Anhui Quanchai Power Co., Ltd. Main drafters of this standard: He Cailin, Shu Weibing, Chen Yunqing, He Pinyan, Shi Songyan, Ren Jiachao, Guo Hua, Song Guochang. This standard is issued for the first time. National Standard 99 www.gb99.cn Free Download JB/T 11204—2011

📚 References & Relations / 引用与关联

📖 Terms & Definitions / 术语和定义 ai_extracted

输入转速 input speed / input speed

硅油风扇离合器试验时的驱动转速。

Drive speed during silicone oil fan clutch testing.

耦合状态 engaged status / engaged status

输入轴转速一定，输出轴转速随输入轴转速运转达到平衡时的状态，为耦合状态。

When the input shaft speed is constant, the state in which the output shaft speed reaches equilibrium as it operates with the input shaft speed is referred to as the coupling state.

分离状态 disengaged status / disengaged status

输入轴转速一定，输出轴转速不随输入轴转速高速运转，而是维持在较低转速的状态为分离状态。

When the input shaft speed is constant, the output shaft speed does not follow the high-speed rotation of the input shaft but instead maintains a lower speed; this state is referred to as the disengaged state.

耦合温度 engaged temperature / engaged temperature

输入轴转速一定，硅油风扇离合器处于分离状态，按要求升温，当风扇转速开始明显上升，到风扇 转速不再上升的开始拐点的温度为耦合温度。

Under a constant input shaft speed, the silicone oil fan clutch is in a disengaged state and is heated as required. The coupling temperature is defined as the temperature at the inflection point where the fan speed begins to rise significantly and then ceases to increase further.

耦合转速 engaged fan speed / engaged fan speed

在耦合温度以上，相应稳定的平均转速为对应轴转速下的耦合转速。

Above the coupling temperature, the corresponding stable average rotational speed is the coupling speed at the corresponding shaft speed.

分离温度 disengaged temperature / disengaged temperature

输入轴转速一定，硅油风扇离合器在耦合状态下，按要求降温，当风扇转速开始明显下降，到风扇 转速不再下降的开始的拐点温度为分离温度。

Given a constant input shaft speed, the silicone oil fan clutch, in the engaged state, is cooled as required. The temperature at the inflection point where the fan speed begins to decrease significantly until it no longer decreases is defined as the disengagement temperature.

分离转速 disengaged fan speed / disengaged fan speed

在分离温度以下，相应稳定的平均转速为对应轴转速下的分离转速。 国标久久 www.gb99.cn 免费下载 JB/T 11204—2011 2

Below the separation temperature, the corresponding stable average rotational speed is the separation speed at the corresponding shaft speed. National Standard www.gb99.cn Free Download JB/T 11204—2011 2

滑差 distinctness of slip / distinctness of slip

硅油风扇离合器在耦合状态下，输入转速之差称为耦合滑差；硅油风扇离合器在分离状态下，输入 转速与风扇转速之差称为分离滑差。

In the engaged state of the silicone oil fan clutch, the difference between the input rotational speeds is referred to as the engaged slip; in the disengaged state of the silicone oil fan clutch, the difference between the input rotational speed and the fan rotational speed is referred to as the disengaged slip.

滑差率 slip rat / slip ratio

耦合滑差与输入轴转速之比的百分数，称为滑差率。

The percentage of the ratio of coupling slip to input shaft speed is called the slip ratio.

温度特性 temperature characteristic / temperature characteristic

在某一输入转速下，在一个升温及降温过程中，随迎风温度变化的风扇转速特性称为该输入转速下 的温度特性。用曲线表示如图1 所示。 图1 硅油风扇离合器温度特性曲线示意图

At a given input rotational speed, the fan speed characteristic that varies with the oncoming air temperature during a heating and cooling process is referred to as the temperature characteristic at that input rotational speed. This is represented by the curve shown in Figure 1. Figure 1 Schematic diagram of the temperature characteristic curve of a silicone oil fan clutch

转速特性 speed characteristic / speed characteristic

硅油风扇离合器输入转速变化时，在耦合及分离状态下风扇转速相应变化的特征。用曲线表示如 图2 所示。 图2 硅油风扇离合器转速特性曲线示意图 国标久久 www.gb99.cn 免费下载 JB/T 11204—2011 3

When the input rotational speed of the silicone oil fan clutch changes, the corresponding variation characteristics of the fan rotational speed under both engaged and disengaged states are represented by curves, as shown in Figure 2. Figure 2 Schematic Diagram of Rotational Speed Characteristic Curve of Silicone Oil Fan Clutch National Standard Forever www.gb99.cn Free Download JB/T 11204—2011 3

🔗 Related Standards / 同类标准