Читать книгу Maintenance, Reliability and Troubleshooting in Rotating Machinery - Группа авторов - Страница 21

An example of a safeguard is a procedure, alarms, or control system designed to prevent a harmful compressor operating condition. For example, variable speed centrifugal compressors have a maximum rotational speed limit. Above the maximum speed limit there is the potential to permanently damage the compressor rotor due to overstress. Every operating limit typically has a related adverse consequence, i.e., if a certain condition occurs, then something bad could happen. Examples of compressor operating conditions to avoid include:

1 Critical speeds

2 Minimum speed

3 Maximum speed

4 Surge flow

5 Stonewall flow (sonic flow conditions)

6 Maximum discharge temperature limit

7 Maximum vibration (% of bearing clearance) limit

8 Radial and thrust bearing temperature limits

9 Maximum horsepower limit