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Knight
Hawk Supply
Your One-Stop Hydraulic Source
Denison Single and Double Vane Motors
Denison Pumps, Motors, Valves
Denison Repair Parts
High Starting Torque Efficiency The high
starting torque efficiency of vane type motors makes them especially applicable
in load hoist winch drives, swing drives and propulsion drives. This high starting
torque efficiency allows the motor to start under high load without pressure
overshoots, jerks and high instantaneous horsepower loads.
High Volumetric Efficiency Vane motors begin
life with high volumetric efficiency and maintain that efficiency throughout
their operating life.
Low Torque Ripple at Low Speed When operating
at very low speeds on applications such as swing and load hoist drives, the
vane motor exhibits very low torque ripple.
2 and 3-speed versions available The M4DC
because of its unequal size cartridges, allows the use of 3-speed operation.
This makes them more applicable in traction drive circuits to replace manually
shifted gear-boxes. 2- speed motors are available in a wider range of ratios
than standard gear motors.
Balanced Design Vane, rotor and cam ring
are pressure balanced to increase life and efficiency over full speed range.
Interchangeable Rotating Groups May be easily
replaced to renew the motor or change displacement to suit altered requirements
for speed or torque.
Reversible Rotation The motors may be stopped
or reversed repeatedly and rapidly driving or braking the connected shaft load
at controlled torque levels.
Wide Speed Range Starting to maximum RPM,
with full torque capability during acceleration.
Ports and Mounting Conform fully to ISO-3019-1
standards to simplify refitting and installation.
Fire Resistant Fluids Are easily used in
the standard M4S version of these motors. These include phosphate or organic
ester fluids and blends, water glycol solutions and water-oil invert emulsions.
M4S Series Motors The M4 motors have been
designed especially for severe duty applications which require high pressure
up to 3400 PSI, high speed up to 3600 RPM and low fluid lubricity.The motor shaft is driven by the rotor. Vanes, closely fitted into the rotor slots move radially to seal against the cam ring. The ring has two major and two minor radial selections joined by transitional sections called ramps. These contours and the pressures exposed to them are balanced diametrically.
Light springs urge the vane radially against the cam contour assuring a seal at zero speed so the motor can develop starting torque. The springs are assisted by centrifugal force at higher speeds. Radial grooves and holes through the vanes equalize radial hydraulic forces on the vanes at all times. Fluid enters and leaves the motor cartridge through openings in the side plates at the ramps. Each motor port connects to two diametrically opposed ramps. Pressurized fluid entering at Port A torques the rotor clockwise. The rotor transports it to the ramp openings which connect to Port B from which it returns to the low pressure side of the system. Pressure at Port B torque's the rotor counter-clockwise.
The rotor is separated axially from the sideplates surfaces by the fluid film. The front sideplate is clamped against the cam ring by the pressure, maintains optimum clearance as dimensions change with temperature and pressure. A 3-way shuttle valve in the sideplate causes clamping pressure to equal the pressure in Port A or B, whichever is the higher.
Materials are chosen for long life efficiency. Vanes, rotor and cam ring are of hardened high alloy steels.
Cast semi-steel sideplates are chemically etched to have a fine crystalline surface for good lubrication at start-up.
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4-port model
|
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| 2-speed motor 2-C-DC | (1st "C + D", 2nd "C" ) |
| 2-speed motor 2-D-DC | (1st "C + D", 2nd "D") |
| 2-speed motor 3-D-C-DC | (1st "C + D", 2nd "D", 3rd "C") |
Four porting options are available:
End ported SAE 1" 4-bolt-SAE 3/4" - 16 UNF drain port
End ported SAE 1" 4-bolt-BSPP 1/2" drain port
Side ported SAE 1" 4-bolt-SAE 3/4" - 16 UNF drain port
Side ported SAE 1" 4-bolt-BSPP 1/2" drain port
M4 motors can be used successfully in applications where the motor must start smoothly at full load. These applications include hoist and swing drives. This smooth start characteristic is due to the inherent high starting torque efficiency (typically 85-95% of running torque). The high starting torque efficiency allows the motor to start at full torque without pressure over-shoot and the accompanying jerk.
To fully realize this smooth start characteristic, the designed maximum operating speed for single cartridge motors should be above 1200 RPM.
For optimum operating efficiency and life, minimum continuous operating speeds should be above 500 RPM, at differential pressure higher than 2000 PSI.
Call,
Fax or Email Knight Hawk Supply for more information on Denison parts
and components 89 Zips Road
Hawk Point, MO 63349
(636) 338-4031 Fax (636) 338-4434
Toll Free (877) 739-3200
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All Rights Reserved
