英语翻译3.Experimental set-upThe test-rig employed for this expe

英语翻译
3.Experimental set-up
The test-rig employed for this experimental work consisted of two identical oil-bath lubricated gearboxes,
connected in a back-to-back arrangement,see Fig.1.The gear set employed was made of 045M15 steel
(without any heat treatment),which had a measured hardness of 137 Hv30.The gears (49 and 65 teeth) had a
module of 3 mm,a pressure angle of 201,and a surface roughness (Ra) of between 2 and 3 mm.A simple
mechanism that permitted a pair of coupling flanges to be rotated relative to each other,and locked in
position,was employed to apply torque to the gears.
The AE sensors used for this experiment were broadband type with relatively flat response in the region
between 100 kHz to 1MHz.One sensor was placed on the pinion with 49 teeth.And the second AE sensor was
located on the bearing casing.The cable connecting the sensor placed on the pinion with the pre-amplifier was
fed into the shaft and connected to a slip ring (‘IDM’ PH-12).This arrangement allowed the AE sensor to be
placed as close as possible to the gear teeth.The sensor was held in place with strong adhesive superglue.The
output signal from the AE sensors was pre-amplified at 20 dB.The signal output from the pre-amplifier was
connected (i.e.via BNC/coaxial cable) directly to a commercial data acquisition card.
An accelerometer was fitted onto the bearing casing to record vibration data,see Fig.1.The accelerometer
used for vibration measurement in this experiment was a resonant type sensor with a frequency response
between 10 and 8000 Hz.The accelerometer was mounted on the base of the bearing casing connecting to the
ARTICLE IN PRESS
Fig.1.Back-to-back gearbox arrangement with AE sensors and accelerometer.
210 C.K.Tan et al./ Mechanical Systems and Signal Processing 21 (2007) 208–233
pinion shaft.The accelerometer was connected to a charge amplifier,and the signal output from the preamplifier
was fed to a commercial data acquisition card.
In normal gearbox operation,an anti-wear lubricant is usually employed to prevent or slow down wear on
the gear teeth.In order to initiate surface pitting in a relatively short time frame,lubricant oil without antiwear
properties was employed for the accelerated gear fatigue tests; SAE 20W-50.Also,to accelerate the
pitting process the face width of the pinion employed was half that of the wheel.

3.实验装置
该试验台采用这项试点工作由两个相同的油浴润滑变速箱,
在后端到后端安排连接,见图.1.该装置采用了一套对045M15钢
（没有任何热处理）,其中有137 Hv30测量硬度.齿轮（49和65齿）有
模块3毫米,1 201压力角,表面粗糙度（Ra）的2至3毫米.一个简单的
机制,允许一对法兰的耦合是彼此相对旋转,并锁定在
位置,是用来申请扭矩的齿轮.
声发射传感器用于实验的宽带相对平坦的区域响应的类型
在100千赫到1兆赫.一个传感器被放置在49齿小齿轮.而第二声发射传感器
位于轴承套管.该电缆连接在与前置放大器放置齿轮传感器
馈入轴和滑环连接到一个（的IDM'PH值- 12）.这项安排让声发射传感器可
置于尽可能接近的齿轮.该传感器是固定在一个地方具有强烈粘合剂强力胶.该
声发射传感器输出信号预放大为20分贝.从前置放大器输出的信号
连接（即厂家,通过/同轴电缆）直接向商业数据采集卡.
加速度计是安装在机壳振动数据记录轴承,见图.1.加速度计
振动测量实验中使用的是一个带频率响应谐振式传感器
10至8000赫兹.加速度计是安装在轴承连接到套管基地
文章新闻
图.1.返回到后端与美国运通传感器和加速度计变速箱安排.
210 C.K.谭等人./机械系统与信号处理21（2007）208-233
小齿轮轴.加速度计是连接到一个电荷放大器,前置放大器和从信号输出
被输送到一个商业数据采集卡.
变速箱在正常运作,一抗磨损润滑油通常是用来防止或减缓磨损
齿轮齿.为了开始表面点蚀在较短的时间内没有抗磨,润滑油
物业曾受聘为加速齿轮疲劳试验; SAE的20瓦,50.此外,为加快
点蚀过程中的小齿轮面宽度雇用了一半,该轮.