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Aviation History
1956
1956 - 1524.PDF
680 FLIGHT SEVEN-STAGE LOW-PRESSURE COMPRESSOR ORION This "Flight" copyright drawing is the first to show the Briitol Orion turboprop in detail. It was drawn at Bristol earlier this month and depicts a unit typical of the first batch. KEY TO DRAWING 1 Distributing sleeve, propeller and reduction gear oil. 2 Reduction gear oil. 3 Propeller oil.4 Oil iet to sun and planet gaars. 5 Oil jet to annulus. 4 Planet carrier. 7 Floating annulus. 8 Torquemeter-piston anchor to annulus. 9 Torquemeter-cvlinder anchor to casing. 10 Torquemeter cylinder. 11 Torquemeter oil galleried round case. 12 Torquemeter oil pump. 13 Torquemeter oil-pump drive. 14 Propeller electrical services. 15 Gear-case diaphragm supporting reduction-gear rear bearing. It Drive to bottom case. 17 Propeller-brake bevel gear. 18 Brake-shoe anchor. 1» Shaft to (17). 20 Propeller-brake actuator. 21 Brake-shoe working on coupling (22). 22 Main coupling, low-pressure shaft to reduction gear.23 Torsion tube. 24 Anti-icing hot air from strut (25) to cowling. 15 Radial struts carrying propeller and reduction-gear services and anti- tcing air. 26 Intake case hot-air muff supplying struts and cowl. 27 Oil tank vent. 28 Vent through tank to intermediate casing. 29 Hot-air duct (supplied from high- pressure delivery on starboard side). 30 Hollow intake guide vanes heated from (29). 31 Low-pressure-shaft thrust bearing. 32 Labyrinth seals. 33 First stage low-pressure blading (all compressor blades steel). 34 Dove-tail stator ro^t:. 35 Compressor-disc driving dogs. 34 Fifth stage air bleed to shaft centre. 37 Fifth stage air through shafting to bearings and seals. 3ft Heiicat coupling, low-pressure com- pressor to turbine. c BOTTOM CASES(LOWERED FROM ATTACHMENT F* 39 High-pressure delivery air to tur- bine seals. 40 Low-pressure turbine shaft. 41 Air-seal tube, passing fifth stage air through coupling. 42 Low-pressure turbine shaft rear bearing. 43 Low-pressure-shaft gear to star- board oil pump supplying t-p shaft bearings. 44 High-pressure shaft gear to port oil pump supplying h-p shaft bearings. 45 Gear train to top wheel-case. 44 Low-pressure delivery. 47 Low-pressure air bleed to aircraft services. 48 High-pressure entry guide-vanes. 4? Hr?h*pre55ure-shaft front bearings. 50 High-pressure fifth (final) stage blading. 51 High-pressure shaft. 52 High-pressure-shaft bearing. 53 Low-pressure-shaft intermediate bearing. 54 High-pressure turbine blades with extended roots. 55 High-pressure turbine disc. 56 Low-pressure turbine; fast-stage blades unshrouded. 57 Combustion-chamber interconnec- tors. 58 Igniter-plug (two). 59 Combustion-chamber front attach- ment, permitting radiaf and axial expansion. 60 Simplex burner. 61 Turbine-casing shroud, collecting seal air. 62 Air from (61) returned to main gas stream, 63 Heat-insulating blanket. 64 Quill-shaft from gear (16) to pro- peller control unit, r.p.m. trans- mitter and oil pump.
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