Modular calibration rotor for a horizontal balancer

Patent metadata

Field	Value
Publication number	US-10197467-B2
Application number	US-201615578204-A
Country	US
Kind code	B2
Filing date	Jun 29, 2016
Priority date	Jul 6, 2015
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A calibration rotor for a horizontal balancer, configured to be driven by a driver. The calibration rotor includes a main barrel that has a longitudinal axis and the periphery of which includes points for attaching balance weights that are evenly distributed in an axial and angular manner about the axis. A rotation guide is arranged at each end of the main barrel. The rotor is modular, and the rotation guide includes adapters (40, 42) which are capable of being configured to be attached to the ends of the barrel. The guide is of a first type, suitable for rotatably guiding the barrel on rollers, or of a second type, suitable for rotatably guiding the half-shell barrel. Each type of adapter has the same predetermined moment of inertia and is interchangeable on the barrel.

First claim

The invention claimed is:

1. A calibration rotor for a horizontal balancing machine, said rotor being configured to be driven by a driver, and comprising at least:
a main barrel having a longitudinal axis A and of which the periphery comprises points configured to attach balance weights, said points being evenly distributed in an axial manner along said axis A and in an angular manner around said axis A, and
one or more guides configured to rotatably guide said main barrel, the one or more guides being arranged at each end of said main barrel,
wherein the rotor is modular, and wherein the one or more guides comprise adapters configured to be attached to ends of the barrel, each adapter being one of: a first type for rotatably guiding the barrel on rollers, and a second type for rotatably guiding the barrel in a half-shell, and each first or second type of adapter having respectively the same predetermined moment of inertia than the second or first type of adapter, and each adapter of the first or second type being able to be respectively attached to the barrel instead of an adapter of the second or first type.

2. The calibration rotor according to claim 1 , further comprising a secondary tubular barrel having a longitudinal axis B and of which the periphery comprises points configured to attach balance weights, said points being evenly distributed in an axial manner along said axis B and in an angular manner around said axis B, and which secondary barrel is configured to be attached in a cantilevered manner to an end of at least one adapter such that the longitudinal axes A and B are aligned.

3. The calibration rotor according to claim 2 , wherein the adapter of the first type comprises a single-piece tubular element comprising at least one first end collar configured to be attached to a complementary end surface of the main barrel, an intermediate portion comprising a raceway configured to engage with rollers of the balancing machine, and a second end collar configured to selectively receive a corresponding collar of said secondary barrel.

4. The calibration rotor according to claim 3 , wherein each adapter comprises a frustoconical annular centering bearing surface which extends axially from each of the end collars thereof, and which is configured to engage a complementary and corresponding frustoconical inner bearing surface of the main barrel or secondary barrel.

5. The calibration rotor according to claim 3 , further comprising a drive element configured to engage one of a belt and a universal joint, the one of a belt and a universal joint also engaging the driver.

6. The calibration rotor according to claim 5 , wherein the drive element is configured to engage the belt, the drive element comprising at least one groove formed on the periphery of the main barrel, which is arranged in an intermediate part of said main barrel, and which is configured to receive the belt to drive the balancing machine.

7. The calibration rotor according to claim 6 , wherein the drive element is configured to engage the universal joint, the drive element comprising:
the second end collar of the guide adapter, which is designed so as to be complementary to a coupling collar of the universal joint, and
an attachment device, arranged between said second end collar and said coupling collar.

8. The calibration rotor according to claim 2 , wherein the guide adapter of the second type comprises first and second coaxial tubular elements configured to be fitted and attached one inside the other, comprise a first end collar configured to be attached to a complementary end collar of the main barrel and a second end collar configured to selectively receive a corresponding collar of said secondary barrel, respectively, and define at the junction therebetween an annular groove for receiving and axially immobilizing an inner race of a roller bearing for guiding in a half-shell, said roller bearing comprising an outer race which is immobilized between a half-shell and a flange of the balancing machine.

9. The calibration rotor according to claim 8 , wherein the first tubular element comprises, at an end opposite the end collar thereof, a frustoconical outer bearing surface configured to be received in a frustoconical inner bearing surface of the second tubular element, a cylindrical bearing surface adjacent to said frustoconical bearing surface, and a tubular portion adjacent to the cylindrical bearing surface and which has a larger diameter than said cylindrical bearing surface, said cylindrical bearing surface defining the groove between said tubular portion and the second tubular element, and in that the first and second coaxial tubular elements are attached to one another by means of screws which pass axially through one of said tubular elements, which are received in the other tubular element, and the tightening of which allows said inner race of the roller bearing to be locked in the groove.

10. The calibration rotor according to claim 2 , further comprising a stop end piece designed to attach to a free end of at least one of the adapters and/or of the secondary barrel to limit the axial movements of the rotor during operation.

Assignees

• Safran Aircraft Engines

Inventors

• Luinaud Alain Roland
• Decocq Alain
• Guengant Christophe

Classifications

• G01M1/02 Primary

  Details of balancing machines or devices · CPC title

• G01M1/04 Primary

  Adaptation of bearing support assemblies for receiving the body to be tested · CPC title

• G01M1/06

  Adaptation of drive assemblies for receiving the body to be tested · CPC title