Bayonet Joint Fastening for Combustion Components (25-Dec-2006)
The idea attempts to reduce the amount of fasteners required to attach the pilot burner to the liquid core, the liquid core to the main burner and the main burner to the combustion casing and provide a more even and consistent sealing load on the joint faces. Today, socket head cap screws are used, around 36 per combustor. All of the socket head cap screws need to torque tightened in sequence.
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Bayonet Joint Fastening for Combustion Components
Idea: Paul Headland, GB-Lincoln; Mike Turnball, GB-Lincoln
The idea attempts to reduce the amount of fasteners required to attach the pilot burner to the liquid core, the liquid core to the main burner and the main burner to the combustion casing and provide a more even and consistent sealing load on the joint faces.
Today, socket head cap screws are used, around 36 per combustor. All of the socket head cap screws need to torque tightened in sequence.
The novel idea utilizes a bayonet fitting at each joint surface to clamp the mating halves together, which would be stopped from rotating loose by a suitable bolt or pin arrangement (see Fig. 1).
The item with the slot is clamped against the sealing surface of the mating part and progressive tightening increases the clamping force, once fully tightened the parts can be stopped from rotating relative to each other by the anti rotation bolts.
Fig. 1: Bayonet Joint Fastening
© SIEMENS AG 2006 file: 2006J23053.doc page: 1
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