
Gear (4) is made of alloyed steel and has five internal projections.
When the coupling is assembled, the gear internal projections are in the slots of the drive shaft disk
which excludes axial displacement of gear (4) relative to the shaft. Two plates (1) and (3) and one spring (2)
are installed in each space between the projections of the gear and shaft disk.
To fix the plates and springs in the axial direction relative to the accessory drive use is made of plate
collars at the front side and cover (32) (Ref. Pig. 1) at the rear side; the cover is secured on the shaft with a
nut.
The spring compression force presses the plates to the end surfaces of the gear and disk projections
which precludes free-wheeling of gear (4) (Ref. Pig. 4) on the accessory drive shaft.
During clockwise rotation the projections of shaft (5) act on plates (1) which transmit torque to the
projections of gear (4) through springs (2) and plates (3). Under steady operating conditions of the engine,
when imparted torque is less than that of pre-com-pressed springs (2), gear (4) does not turn relative to drive
shaft (5).
As operating conditions change, when moments exceeding those of pre-compressed springs nay be
transmitted to the blower drive, the springs compress and the gear turns relative to the drive shaft through a
certain angle precluding high impact loads on the blower drive parts, hence their breakage.
Twin gear (25) (Ref. Fig. 1) of the blower drive comprises two spur gears made as one piece of
cemented ateel and has two support necks.
The twin gear rests with its front neck in bushing (26) of diffuser (24), with the rear one, in the hole of
diffuser bracket (28). Oil is fed to the bushings under pressure through holes in the necks.
Torque is imparted to the blower Impeller through the train: from the accessory drive shaft through
the blower drive coupling gear of blower coupling (29), small rim of twin gear (25). The large rim of the twin
gear meshes with the gear rim of blower impeller shaft (33).
The crankshaft-to-impeller transmission ration is 8.160.
To preclude ingress of oil from the space defined by the front wall of the mixture collector and rear
wall of the crankcase, as well as from the rear cover to the fuel mixture, the blower is provided with a sealing
system comprising oil baffle (34) and two oil seal bushings (8) and (35) with rings (27) and (30)
communicating with the atmosphere through breather (2).
The ateel oil baffle installed between the impeller shaft gear rim and oil seal bushing keeps oil off the
blower impeller on the rear side of the crankcase cover.
Содержание M-14P
Страница 6: ...19 Engine M 14P Front View Figure 1...
Страница 7: ...20 Engine M 14P Rear View Figure 2...
Страница 27: ...40 Arrangement of Airborne Tools in Case Figure 1...
Страница 39: ......
Страница 44: ...57 Engine M 14P Test Run Chart Figure 201...
Страница 67: ...80...
Страница 163: ...176 Crankshaft Thrust Ball Bearing Front Cover Figure 1 Intermediate Crankcase Figure 2...
Страница 166: ...179 Intermediate Grankcase Front Portion Figure 3 Intermediate Crankcase Rear Portion Figure 4...
Страница 173: ...186 Front view Cylinder Figure 1 Rear view...
Страница 174: ...187 1 Inlet Valve 2 Outer Spring 3 Inner Spring 4 Split Retainer 5 Valve Plate Inlet Valve Figure 2...
Страница 178: ...191 Intake Pipe of Cylinders Nos 4 5 and 6 Figure 4 Piston Piston Rings and Piston Pin with Plugs Figure 5...
Страница 180: ...193 Timing Mechanism Schematic Diagram Figure 6 Cam Plate Figure 7...
Страница 189: ...Blower Longitudinal Section View Figure 1...
Страница 191: ...Rear view Mixture Collector Figure 2 Diffuser Figure 3...
Страница 194: ...1 Plate 2 Spring 3 Plate 4 Gear 5 Accessory Drive Shaft Blower Coupling Figure 4...
Страница 204: ...Oil Sump Figure 4...
Страница 216: ...Engine M 14P Gear Train Figure 1...
Страница 247: ...Carburetor AK 14P Operation Diagram Figure 1...
Страница 249: ......
Страница 267: ...OPERATIONS AND TECHNICAL REQUIREMENTS CORRECTIVE ACTIONS CH ECKED BY Carburetor AK 14P Right Side View Figure 201...
Страница 273: ...Carburetor Altitude Control Needle Position Versus Barometric Pressure Barometric Graph Figure 203...
Страница 274: ......
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Страница 288: ...T t en 0 CO 0 T K D fi h0 Ol f 01 3 0 F4...
Страница 293: ......
Страница 309: ...SPARK PLUG SD 49SMM MAINTENANCE PRACTICES 1 LIST OF TASK CARDS Title Task Card Uo Removal 201 Installation 202...
Страница 344: ...Generator Electrical Connection Diagram Commutator Side View Figure 3 1 Main Pole 2 Interpole...
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