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One end of the spindle is fined down to take a small pinion, P1, meshing with a large pinion, P2, the latter running in bearings, BG3, in the wheel-case and cover. The drive of the turbine is transmitted either direct from the axle of P2 or from a pulley mounted on it. Plate marked out for turbine wheel blades. The Wheel.
General The sides of the casing are held against the drum by six screw bolts on the outside of the drum. The oil box on top of the casing has a pad of cotton wool at the bottom to regulate the flow of oil to the bearings. Fit a drain pipe to the bottom of the wheel-case. Testing.
Each wheel is in a separate chamber formed by the diaphragms which rest on ledges on the inside of the wheel-case, their weight and steam pressure on the upper side holding them firmly in place and making a steam-tight joint where they rest. Each diaphragm, with the exception of the top one, carries the expanding nozzles for the wheel immediately below.
In such cases the shrouding has been turned or faced off by a cutting-off tool used through the peep-hole. Carbon Packing Used Where the shaft passes through the upper head of the wheel-case some provision must be made to prevent steam from the first stage escaping. There are three sets of these blocks, and each set is made of two rings of three segments each.
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