In 2003, Venti Oelde delivered a high-performance centrifugal fan for use in a coal mill to a steelworks. Today after nearly 20 years later, the fan came back to our factory for a first modernization pit stop.
An initial inspection only showed some worn areas on the impeller blades. To get a more detailed look, the impeller with the mounted shaft was dismantled together with the block bearing and the attached coupling half. This revealed that the shaft had taken a blow and been damaged at some point in the past, so that it would need to be replaced together with the rolling bearings, feather keys and shaft protection sleeves. The newly installed shaft protection sleeve is now hard-chrome plated – which will reduce scoring and allow for a longer service life.
With this new assembly, instead of replacing the whole shaft protection sleeve, only the shaft sealing rings will need to be exchanged. For the operator, this means a significant reduction in disassembly and assembly times – and significant cost savings.
With rewelded impeller blades and a rebalancing, the modernized impeller was ready to head back to the plant and a resumption of service. Here’s to the next 20 years ...
High-performance centrifugal fan: Technical data
Manufacturer: Venti Oelde, Model HRV 50-1250/K
| Volume flow: | 166,500 Bm³/h |
| Overall pressure difference: | 11,488 Pa |
| Drive power: | 710 kW |
| Impeller diameter: | 2,103 mm |
| Handled medium: | Filtered inert gas |
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