According to its design, the Kracht KP 0 external gear pump belongs to the type of so-called gland type pumps. The essential functional elements, gearing and bearing glands are located in an aluminium housing of high-strength extruded alloy, which is limited laterally by the the cover plate and flange cover. The gearing, made of case hardened steel with surface hardening, consists of the drive shaft wheel and pin wheel. The highest manufacturing quality is guaranteed by shaving the tooth flanks.
The shaft journals are finely ground. Due to the high number of teeth (n = 12) and the special tooth shape, a considerable reduction in design-related volume flow fluctuation and the associated pressure pulsation is achieved. The gland bearings located on both sides of the
gearing carry the journals in heavyduty multicomponent plane bearing bushes and contain additionally those sealing elements which serve for the pressure field sealing to compensate the axial clearance.
1. External loads
External forces acting on the drive shaft end have an influence on the operation of the bearing glands. Radial and axial forces are not permissible. An end bearing must be used for the purpose of absorbing external forces.
2. Direction of rotation
Regarding the direction of rotation basically the following applies provided the view is directed toward the drive shaft end: Drive shaft end rotating clockwise: Flow direction from left to right. Drive shaft end rotating anticlockwise: Flow direction from right to left.