GEROTOR pump - known INTERNAL rotor
This type of pumps is commonly used for the forced lubrication of endothermic motors.
The pump is the heart of the engine and lubricates its various moving parts.
The pump consist of four elements:
1. Carter
2. Cover
3. Internal and external rotor
4. Pressure valve.
The analysis, it is independent of any design activity.
Geometric elements of the inner rotor are known ARCHES and the profile is self-built by the data
provided in INPUT.
The value of STI is fixed with the position of its center.
It is verified the value of the SFi radius that must be tangent to DiRi diameter and adjacent to STi
rays.
STi : Internal Rotor tip radius.
Sfi : Radius of the rotor lobe generator-circle.
Calc : Calculation step [DEG] ( suggest = 0.5 ).
Dist : Minimum distance between points calculated with Calc value (suggested 0.2 mm).
JMAX : Max coupling backlash; this value allows to define the Offset value applicable to profile:
Off = ( JMAX - ( Si.min - Se.max ) /2 ) * K * (-1)
Si.min = Lover deviation of external diam. (Internal Rotor)
Se.max = Upper deviation of internal diam. (External Rotor)
K = Backlash coefficient management, is a user parameter that aims to ensure the
presence of a minimum clearance even when Iy is made with the minimum deviation
value (must be > 1 and is suggested = 1.1).
Activate the check 'Enables the calculation of Control Points even on the Scaled Profile' to
create control points table also for rescaled profile ( % of shrinkage value).
A text format temporary file contains all control points coordinates are created:
C: \ CAM-SOFT \ GEAR2000 \ Temp \ GEAR2000intersez.txt
This file is readable with CAM-SOFT applications such as EDM2000 or PGL2000.
GEAR2000 Help
