An overhung machine is one where the fan or impeller lies outside of the bearings that support the shaft. Figure 1, below, shows an illustration of an overhung impeller. Figure 1. Overhung impeller connected to a motor Overhung machines tend to have high 1X forces
Belt drives are widely used in many industries for power transmission since they are cheap and easy to maintain. However they are often a source of vibration due to misalignments, belt resonance, and belt wear. The main purpose of belt drives is to transfer power
Belt drives are widely used in many industries for power transmission since they are cheap and easy to maintain. However they are often a source of vibration due to misalignments, belt resonance, and belt wear. The main purpose of belt drives is to transfer power
It is essential to design a device that has to meet a certain vibration level. Ideally, the desired vibration response must be clearly stated before a design can begin. Many different methods have been proposed to measure and describe acceptable levels of vibration in many
In a previous post I discussed electric motor testing, specifically static or offline testing. This week I would like to tackle the subject of dynamic or online testing of electric motors. As the name suggests, dynamic tests are performed while the electric motor is running i.e. when it
Machines are expected to vibrate as little as possible to avoid component fatigue/failure and in some cases, reduce user comfort level, for example, violent vibration of an automobile can lead to mechanical failure and driver discomfort. There are ways to avoid violent vibration such as