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HYDRAULIC
MOTORS |
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Many types of drives can fulfil the elementary function of driving a machine but Düsterloh hydraulic motors have lots of additional features and characteristics which other types of drives cannot match. This is why Düsterloh hydraulic motors are the first choice for solving a wide variety of complex drive problems. Düsterloh hydraulic motors have a high starting torque. This is required for instance, for safe operation of the heavy gates on the material lock in a nuclear power plant or to hand over the weighty coils in a rolling mill. Due to the low amount of revolving mass, the rotational direction can be quickly changed in Düsterloh hydraulic motors. This feature is very important in many test benches; when performing vibration tests on motorcycle forks or when testing the adjustment of wing flaps on aircrafts. The components can perform up to 50 rotational direction changes per second. An exact adherance to the specified rotational speed profile is of essential importance for many fields of application of hydraulic motors. Düsterloh now presents a new generation of motors, for which a significantly improved constancy of rotational speed was achieved compared to conventional motors. Hydraulic radial piston motors |
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| AE series axial piston motors » Type AE3 - AE45 link to » performance data table |
KM series radial piston motors » Type KM11 - KM110 link to » performance data table |
RM series radial piston motors » Type RM80N - RM5000X link to » performance data table |
Variable motors » |
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| displacement:3 - 45 cc/rev operating pressure: 210 bar speed: up to 3000 rpm torque: 34 - 134 Nm |
displacement: 11 - 110 cc/rev operating pressure: 140/160 bar speed: up to 3600 rpm torque: 21 - 222 Nm |
displacement 80 - 5278 cc/rev operating pressure: 250 bar speed: up to 800 rpm torque: 288 - 19320 Nm |
see table for info |
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 The
comprehensive RM range feature:» Choice of shafts. » Double shaft extension. » Motor and brake combinations. » Geared motors; gear motor and brake combinations. » Tachometer and other measuring attachments. » Couplings, flanges. » Viton seals. » Direct valve assembly possible. » Connection SAE J 518 high pressure (type: A1). » Special models for HFB and HFC non-flammable fluids. |
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available in a new High Precision version. Use
as standard for stable speeds significantly less than 1rpm. » Also available with servo regulation to give the ultimate in low speed performance. » Precision drives ideally suited to test rig applications where accurate speed regulation is critical. |
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 Design modifications in the flow control inside the motor as well as in the arrangement of the pistons have led to significant improvement of the constancy of the rotational speed. In addition, the speed range was clearly extended downwards. For the standard motor which is already precise in competitive comparison, the ability to run is ensured for a minimum speed of 5 min-1. The high precision motor can achieve speeds of significantly less than 1min-1 with already good constancy of speed in unregulated operation. The maximum speed is still up to 2000 min-1, depending on the motor size. |
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The radial piston hydraulic
motor has been designed with a high load capacity. It is efficient,
has a low moment of inertia and is capable of very low speeds
and has excellent reversing properties. Operating characteristics:
five radial piston/connecting rod assemblies bear on the crankshaft
which is located by heavy duty tapered roller bearings. Connecting rod: the computer optimated design is hydrostatically balanced on the crankshaft with sufficient leakage to ensure lubrication and cooling. Friction losses are reduced to a minimum and stick slip action is avoided at low speeds. High starting torque and running torque combined with high speeds are important features of the design. Long service life is assured since con-rod slippers are uneffected by contamination and self-adjustable. Non-flammable fluids have been used with success. Noise generation is also reduced by the cushioning effect of the hydrostatic bearing design.
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