Patent ID: 11878347
Assignee: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  F  Y | IPC B  F

Claim 10:
11. A method for manufacturing an impeller, said method comprising the following steps:
providing a central shaft or a tube for mounting on a shaft;
providing a hollow hub around the shaft or tube which in a direction from one end to the other end increases in diameter, said hub possessing an outside and an inside oriented towards the shaft or tube;
providing a back wall which is provided at an end of the hub with the largest diameter perpendicular to the shaft or tube which at least partially closes the hollow space of the hub;
providing a series of blades that are attached to the outside of the hub by their base,
wherein the method further comprises the step of providing a number of flat, straight reinforcing ribs which extend on the shaft or tube in an essentially radial direction and form a radial connection between the shaft or tube and the inside of the hub,
wherein it further comprises the step of providing the impeller with at least one polygon or ring connecting all reinforcing ribs with each other, and which is concentric with the central shaft or tube,
wherein the method further comprises the step of providing one or more passages during an additive production process,
wherein at least one passage is always provided in a section of the polygon or ring located between two reinforcing ribs.