High Pressure Gear Motors KM1 KRACHT - Đại Lý KRACHT Việt Nam

High Pressure Gear Motors KM1 KRACHT

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Accordingly to its configuration – the Design principle
is illustrated by the Sectional figure above – the KRACHT
External Gear-Type Motor Series KM 1 is classified in the
category of the so-called Gland-Type Bearing Motors.
All essential functional parts as the gearing and the
gland bearings are located in an aluminium housing
manufactured of a high strength extrusion alloy which
is closed on each side by an end cover or by a flange
mounting cover respectively.
The gearing of case hardening steel in surface hardened
condition consists of the pinion shaft and the pinion.
Highest manufacturing quality is assured by grinding
and honing of the tooth flanks.
The surfaces of the journals are super finished.
An important reduction of the type dependent deviation
of the volumetric flow and of the pressure pulsation was
achieved on the basis of the great teeth number (z = 13)
and the specially shaped teeth.
The gland bearings located on both sides of the gearing
carry the journals in heavy duty multicomponent plane
bearing bushes and contain additionally those sealing
elements which serve for the pressure field sealing to
compensate the axial clearance.
If requested the engines with built up special valve
can be delivered.
Multiple engine combinations are possible.
The optimal design of the pressure fields guarantees
very good efficiencies over a wide pressure/speed range
on the one hand – at the nominal working point for
instance a total efficiency of 90 % and above is reached –
and ensures a smooth starting behaviour of the motor
1 Housing
2 Gearing
3 Drive shaft end
4 Flange mounting cover
5 End cover
6 Double gland bearing with
special plane bearing bushes
7 Rotary shaft lip-type seals
8 Pressure field sealing for
axial clearance compensation
9 Sealing of the housing
10 Drain port
10 5 8 9 1 2 6 4 7 3
on the other hand and that already at a low rate of the
input flow.
As the pressure fields are symmetrically arranged the
motors can be used as well for clockwise as for
anticlockwise rotation (reversible working modes).
The pressure relief of the shaft seal is effected by
the drain port to be found in the end cover,
(note the max. permissible drain pressure) so that the
motors may be pressurized at the outlet side, hence
follows that it is possible to connect together several
motors in series.
For high speed Operation the shaft seal must be of
FKM-material, refer to page 5.
The combination of 2 motors for instance coupled
together and provided with a common supply line
makes a Flow Divider with a high dividing accuracy.
Note:
External loads
Radial or Axial loads acting on the shaft end impair
the functions of the gland bearings. Radial loads can
possibly be absorbed in dependence on the extent
and the direction of the loads.
Axial loads are NOT permissible.
To absorb external loads the motor type with outboard
bearing must be used.
New (on request):
These engines are also available with reduced
flank clearance. This results in lower pulsation and
considerably improved start-up behaviour.

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