rotary pump

Rotary pump
The main rotating components are the drive
shaft (1), distributor rotor (2), transfer pump
blades (5), and governor components (11).
The drive shaft engages the distributor rotor
in the hydraulic head. The drive end of the
rotor incorporates two pumping plungers.
The plungers are actuated toward each
other simultaneously by an internal cam ring
through rollers and shoes which are carried in
slots at the drive end of the rotor. The number
of cam lobes normally equals the number of
engine cylinders.
Fig. 1 — Pump
Fig. 2 — Sectional view
The transfer pump at the rear of the rotor is
the postive displacement vane-type and is
enclosed in the end cap. The end cap also
houses the fuel inlet strainer and transfer pump
pressure regulator. Transfer pump pressure is
automatically compensated for viscosity effects
due to both temperature changes and various
fuel grades.
The distributor rotor incorporates two
charging ports and a single axial bore with one
discharge port to serve all head outlets to the
injection tubings. The hydraulic head contains
the bore in which the rotor revolves, the metering
valve bore, the charging ports and the head
outlet fittings. The high pressure injection
tubings leading to the nozzles are fastened to
these fittings.
Distributor pumps contain their own
mechanical governor capable of close speed
regulation. Both all-speed and min-max types
are available. The centrifugal force of the weights
in their retainer is transmitted through a sleeve
to the governor arm and through a linkage to
the metering valve. The metering valve can be
closed to shut off fuel through the linkage by an
independently operated shut-off lever.
Components:
1. Drive Shaft
2. Distributor Rotor
3. Hydraulic Head
4. Delivery Valve
5. Transfer Pump
6. Pressure Regulator
7. Discharge Fitting
8. Metering Valve
9. Pumping Plungers
10. Internal Cam Ring
11. Governor
12. Governor Weights
13. Advance
14. Drive Shaft Bushing
15. Housing
1

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