Method for machining ribs or grooves on a shaft for air or gas bearings of a compressor
AssigneeBelenos Clean Power Holding AG
InventorRexhep GASHI
Life of this patent
Estimating the term…
Abstract
A method for machining ribs or grooves on a shaft (7) with an axial bearing (24) forming part of the shaft. The ribs or grooves (32, 24a) are obtained on a workpiece portion of the shaft and of the axial bearing, by moving the shaft or at least one tool holder fitted with a machining tool in a longitudinal direction of machining, by the tool performing reciprocating motions with a position in contact and with a position not in contact with the shaft or the axial bearing from the beginning to the end of the workpiece portion or face. The reciprocating motions are synchronised with the sinusoidal programming carried out in the machining unit, along with the desired and programmed arrangement of the ribs or grooves to be produced.
Claims10
A method for machining ribs or grooves on a shaft (7) intended to be rotated about a longitudinal axis (A-A) of a centrifugal compressor (1), and/or on an air or gas axial bearing (24) forming part of the shaft (7), a rotor structure (16) with at least one permanent magnet (16a) of an electric motor being intended to be mounted on the shaft (7) or in the shaft (7) in order to drive the shaft rotatably, the centrifugal compressor (1) further comprising a casing (2) having a fluid inlet (5) and a compressed fluid outlet (6), a first compressor wheel (8) and a second compressor wheel (10) intended to be mounted at two ends of the shaft (7) in the casing (2), a front air or gas radial bearing (18) intended to be mounted on a first end of the shaft (7), and/or a rear air or gas radial bearing (22) intended to be mounted on a second end of the shaft (7), the machining method being carried out in a machining unit (100) adapted to receive the shaft (7) with the axial bearing (24) to be machined and comprising a tool holder (160) with a machining tool (120, 121) for machining the ribs or grooves on at least one portion of the shaft (7) or of the axial bearing (24) of the shaft (7), the method being characterised in that all of the ribs or grooves (24a;
- 32) are obtained on a workpiece portion of the shaft driven rotatably and/or of the disc of the axial bearing (24) of the shaft (7), by displacement of the shaft (7) and/or of the disc of the axial bearing (24) of the shaft (7), or of the tool holder (160) at once, in a longitudinal machining direction, by the machining tool (120, 121) performing reciprocating motions with a machining position in contact with the shaft (7) and/or with the disc of the axial bearing (24) of the shaft (7), and a position without contact with the shaft (7) and/or with the disc of the axial bearing (24) of the shaft (7), from the beginning to the end of the workpiece portion with the shaft (7) and/or with the disc of the axial bearing (24) of the shaft (7), and in that the reciprocating motions of the machining tool (120, 121) are synchronised with a sinusoidal program carried out in the machining unit (100), as well as with the desired and programmed arrangement of the ribs or grooves to be produced on the portion of the shaft (7) and/or of the disc of the axial bearing (24) of the shaft (7).
Dependencies are inferred from the claim text.