Abstract

Disclosed is a method for balancing the out-of-balance of a shaft/wheel assembly. The balancing method involves a step of measuring the value of the out-of-balance of a wheel/shaft assembly with respect to a longitudinal axis of the mechanical shaft, and then measuring the position of at least two different target zones present on the surface of the wheel. The method involves removing material from the surface of the vaned wheel in order to reduce the value of the out-of-balance of the shaft/wheel assembly depending on the measurements taken in steps a) and b). In this way, the balancing method is much more precise compared with the prior art.

IPC Classes  ?

• F01D 5/02 - Blade-carrying members, e.g. rotors
• G01M 1/24 - Performing balancing on elastic shafts, e.g. for crankshafts
• G01M 1/34 - Compensating imbalance by removing material from the body to be tested, e.g. from the tread of tyres

Abstract

The invention relates to a device for angular indexing of an impeller. The angular indexing device (2A) is characterised in that it comprises: - a knocker (4) mounted on a mechanical shaft (6), the knocker (4) being able to be inserted, at least partially, between two adjacent vanes (54) of an impeller (50) in order to stop its pivoting and - movement means (22) of the mechanical shaft (6) along a path between a locking position (28) and an unlocking position (32); and - a mechanical stop (26) preventing the mechanical shaft (6) from going beyond the locking position (28) and - return means (30) of the mechanical shaft (6) when it moves away from an initial position between the locking position (28) and the unlocking position (32).

IPC Classes  ?

• F02C 6/12 - Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• G01M 1/02 - Details of balancing machines or devices

Abstract

The invention relates to a method for selecting a radial profile of a cavity to be produced in a rear side of an impeller. The selection method advantageously allows the radial profile (16C) of a cavity (14) to be adapted to a specific area (2) with depth and radial constraints, by favouring an extended radial profile (16C) of the cavity in the specific area, such that the depth of the cavity is as low as possible in the specific area.

IPC Classes  ?

• F01D 5/02 - Blade-carrying members, e.g. rotors
• F04D 29/66 - Combating cavitation, whirls, noise, vibration, or the likeBalancing

Abstract

The invention relates to a method for balancing the out-of-balance of a shaft/wheel assembly. According to the invention, the balancing method involves a step of measuring the value of the out-of-balance of a wheel/shaft assembly (2) with respect to a longitudinal axis (18) of the mechanical shaft (6), and then measuring the position of at least two different target zones (20) present on the surface of the wheel. The invention is notable in that it involves removing material (22) from the surface of the vaned wheel (4) in order to reduce the value of the out-of-balance of the shaft/wheel assembly (2) depending on the measurements taken in steps a) and b). In this way, the balancing method proposed by the invention is much more precise compared with the prior art.

IPC Classes  ?

• G01M 1/24 - Performing balancing on elastic shafts, e.g. for crankshafts
• F01D 5/02 - Blade-carrying members, e.g. rotors
• G01M 1/34 - Compensating imbalance by removing material from the body to be tested, e.g. from the tread of tyres
• G01B 11/26 - Measuring arrangements characterised by the use of optical techniques for measuring angles or tapersMeasuring arrangements characterised by the use of optical techniques for testing the alignment of axes