Bolted joint for rotor disks and method of reducing thermal gradients therein
US6428272B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Dec 27, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Rotor disk stress is reduced in a bolted joint for connecting adjacent rotor disks in a gas turbine engine. The bolted joint includes a bolt hole formed in the first rotor disk and a tube disposed in the bolt hole such that a channel is defined between the tube and the bolt hole. A bolt is disposed in the tube such that a gap is defined between the bolt and the tube. The gap thermally insulates the bolt from hot fluid in the channel. A first passage provides fluid communication between the channel and a forward cavity, and a second passage provides fluid communication between the channel and an aft cavity. Hot fluid passing through the channel reduces thermal gradients in the first rotor disk. The tube thermally shields the bolt from the hot fluid to minimize differential thermal growth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.