The author of this book has very successfully used a telemetry system for monitoring the vibration displacement and stresses, in the moving blades of a large steam turbine and also on the impellers of a forced-draft (FD) fans, used in large thermal-power plants. December 16, 2021 Read More »
Figure 7.21 shows the vibration data obtained on a large boiler feed pump operating on a re-circulation mode. December 16, 2021 Read More »
In a large, 3000-rpm, sea shore-located power plant comprising of HP turbine and LP turbine, the sea water-cooled surface conducers is connected to the LP cylinder through a flexible joint (dog-bone joint) and the condenser is rigidly fixed to the foundation (Fig. 7.24). December 16, 2021 Read More »
This case study pertains to the vibration problem appearing in the bearing of the drive motor (2MW, 3000 rpm, AC motor) that drives gas-oil pump in a refinery. December 16, 2021 Read More »
It is extremely important to note and remember that in each of the example discussed in the previous paragraphs, the recorded vibration amplitude occurred at the rotating speed frequency (1 × n) of the machine. December 16, 2021 Read More »
In yet another similar case, the vibration levels despite controlling the oil-inlet temperature and pressure did not come down to safe limits. December 16, 2021 Read More »
High vibrations / noise and repeated cracking of runner blades (Fig. 7.45) were experienced on practically all units of 6×60 MW, 167.7 RPM (specific speed 263 metric) hydro station. December 16, 2021 Read More »
The case study pertains to 4 x 80 hydro station (Fig. 7.49) having high vibrations and intense noise problem. December 16, 2021 Read More »
A large utility turbine comprises of HP turbine, IP turbine, and LP turbine on a common shaft driving an AC generator, experienced repeated failures of one of the stages of IP turbine. December 16, 2021 Read More »