6
EATON Vane Motors M-2740-S June 2011
Description
General
Vickers high performance vane motors, when properly
installed in a hydraulic circuit, convert hydraulic power into
rotary mechanical power. They are positive-displacement,
balanced cartridge units, with drive speed dependent on
the motor size and gpm delivery to the inlet port. The units
are capable of operating at high speeds and high pressures,
or higher speeds at lower pressures. These motors may be
operated in either direction of rotation, reversed or stalled
under load conditions without damage.
All motors covered in this manual are basically identical in
construction. The motors are designed so that the maximum
torque capability can be changed within a series by changing
the cartridge or the cam ring.
Assembly and Construction
Basic motor construction is illustrated in Figure 1. The unit
consists principally of a body, cover, drive cartridge and shaft.
Rotary motion is developed in the cartridge, which principally
consists of a ring, rotor, ten vanes and two pressure plates.
The rotor is splined and mates with the output shaft, which is
supported by a ball bearing in the body and a bushing bearing
in the cover pressure plate.
The vanes slide radially in the rotor slots and follow the
elliptical cam contour of the ring as the rotor turns. These
vanes are held against the ring by a combination of spring
and centrifugal forces.
Port connections are located in the body and cover. Direction
of shaft rotation is governed by the direction of fluid flow
through these ports. Pressure is sealed from one port to the
other by a Teflon sealing ring in the body on the periphery of
the ring. Drainage is ported through an external connection in
the cover.
The cartridge is bolted together and can be serviced as a
complete assembly. Locating pins position the ring with
respect to the pressure plates, and in like manner, two
torque pins position the cartridge in the cover. The cover can
be assembled in four positions with respect to the body.
Changing of the port positions is accomplished by rotating
the cover and cartridge.
Mounting
The motors are body face mounted, or are available with an
optional foot mounting (see Section IV). The body mounting is
a standard SAE 2-bolt type.
Applications
Vickers high performance vane motors are rated in
poundinches of torque per 100 psi. Horsepower output is
proportional to drive speed so long as pressure is constant.
For application information, refer to the appropriate
installation drawing (Table 1) or consult Vickers application
engineering personnel.
Figure 1. Cutaway View of Vane Motor.
Cover Port
Vane
Spring
Drain
Bushing
Cover
Pressure
Plate
Ring
Rotor
Body Pressure Plate
Bearing
Felt Wiper
Shaft
Shaft Seal
Hub Adaptor
Body Port
Teflon Ring
O-ring