Vibration limits in electric motors
1 Vibration limits in electric motors
This article presents the vibration limits in electric motors as defined in the ISO series of standards. 10816 on mechanical vibrations in machines.
This article is part of a series of articles included in support of Course on Vibration Limits
It is common to find technicians who have not yet realized the complexity involved in defining vibration limits in these machines., according to this standard.
This presentation is for them.
Effectively, the vibration limit in this type of machines also depends on the type of driven machine and its connection method as defined in the:
- ISO10816-3 for general machinery
- ISO 14694 for fans
- ISO 10816-7 for rotary pumps
Thus, these limits depend on multiple factors, making their definition more complex..
When it takes place vibration analysis in fans, in a vibration analyzer when performing predictive maintenance, common vibration analyzer This article presents the vibration limits in rotary-dynamic pumps as defined in the ISO series of standards..
2 The ISO 14694:2003 This article presents the vibration limits in fans as defined in the ISO standard – Part 7: This article presents the vibration limits in fans as defined in the ISO standard.
In this standard, it can be seen that the flowchart for defining limits is as follows:
3 At ISO 10816-7 2009 A positive displacement pump can operate by forcing a fixed volume of fluid from the inlet pressure section of the pump into the discharge zone of the pump. – Part 7 A positive displacement pump can operate by forcing a fixed volume of fluid from the inlet pressure section of the pump into the discharge zone of the pump., A positive displacement pump can operate by forcing a fixed volume of fluid from the inlet pressure section of the pump into the discharge zone of the pump.
In this standard, it can be seen that the flowchart for defining limits is as follows:
4 – Vibration limits in motors of other machines (other than fans or roto-dynamic pumps)
According to ISO 10816-3 The vibration limits in electric motors are shown in the figure below..
5 General scheme for selecting vibration limits in electric motors
Combining these two flowcharts with some of the exclusions from ISO10816-3, we have what you see in the figure below..
