安装不当，导致噪音问题案例分析
Pipeline pump improper installation, resulting in noise problem case analysis
一、服务背景Service Background
在浙江宁波某芯片国际大厂，现场安装12台管道水泵，用于空调水循环系统,有一台水泵噪音值高达102dB，其它5台水泵也有间隔性噪音大，2021年曾经向工厂反映过噪音问题，也派服务人员处理过一台噪音问题，通过打磨抛光叶轮口环的方式，处理好噪音问题。现在出现一半有噪音问题，业主直接怀疑这批电机都存在问题。
A chip international companies in Ningbo, Zhejiang province, 12 sets of pipeline pumps, on-site installation for air conditioning water system, there is a water pump noise value as high as 102 dB, the other 5 pumps have interval noisy, in 2021 has been to the factory reflect the noise problem, also send service personnel with a noise problem, through the way of grinding and polishing impeller mouth ring, Deal with noise. Now half of them have noise problems, and the owner directly suspects that there are problems with this batch of motors.
二、服务内容Service Content
（一）现场检查噪音问题最严重一台 Site inspection noise problem is the most serious one
1，噪音现象：电机正常运转时，噪音大，停机阶段，有金属剐蹭异响。
Noise phenomenon: when the motor is running normally, the noise is high. During the shutdown stage, there is a metal scraping noise.
2，检查该泵、电机与底座之间，紧固螺栓松动情况，部分垫片处于自由状态，原因在于垫脚使用橡胶垫块，经过一段时间运行，橡胶有变形情况发生，导致泵与电机处于松动状态。（现场图如下）
Check the loosening of the fastening bolts between the pump, the motor and the base. Part of the gasket is in a free state. The reason is that the rubber pad is used for the gasket. (The scene picture is as follows)
３，拆开电机检查，电机两端轴承情况，拆电机非驱动端时，发现轴承防尘外盖以及油脂有大量灰尘，以及油脂有轻微进水乳化现象。驱动端轴承情况，未见明显异常。防尘密封圈以及轴承密封盖未见损害情况，灰尘与轻微进水不排除在土建过程中，储存不当所致。（下图为非驱动端，拆开后拍取，箭头指向大量灰尘以及油脂轻微进水乳化）
When disassembling the motor, check the bearings at both ends of the motor. When disassembling the non-driving end of the motor, it is found that there is a lot of dust on the dust-proof outer cover of the bearing and the grease, and the grease is slightly emulsified by water. Bearing condition of driving end, no obvious abnormality. Dustproof seal ring and bearing seal cover are not damaged, dust and slight water do not exclude improper storage in the process of civil construction. (The following figure shows the non-driven end, which is taken after disassembly. The arrow points to a large amount of dust and grease emulsified by slight water)
4，该电机转子以及防尘盖等其余零部件，经检查未发现异常，如下图：
The rotor of the motor, dust cover and other parts have not been found abnormal after inspection, as shown below:
5，抛光叶轮口环与耐磨环（下图为抛光前照片）
Polishing impeller mouth ring and wear ring (the picture below is before polishing)
6，安装电机新轴承Install new bearings for motor
8， 泵与电机脚垫块，应该使用不易变形的铁质材料比如Q235, 或薄不锈钢片调整间隙。原橡胶垫块如下图：
Pump and motor foot pads should be made of iron material such as Q235 or thin stainless steel to adjust the clearance. The original rubber pad is shown as follows:
总结SUMMARY：
1，管道泵使用橡胶垫块，橡胶易变形，导致安装水泵时，绑紧锁紧螺丝时导致泵被受力扭曲，运行时导致叶轮偏磨，发生振动大噪音大的问题。另外，橡胶在受力一段时间，发生形变，不可恢复，导致锁紧螺丝松动。
2，此外，后端轴承进水进大量灰尘叠加安装不良，导致这台泵成为噪音最严重的一台。
1, the pipeline pump using rubber pad block, rubber deformation, resulting in the installation of the pump, the pump is forced when the screw is tied, resulting in the distortion of the impeller during operation, resulting in the problem of vibration and noise. In addition, when the rubber is stressed for a period of time, deformation occurs and cannot be recovered, resulting in loosening of the locking screw.
2, in addition, the rear bearing water into a large amount of dust superimposed poor installation, resulting in this pump becomes the most serious noise.