Assembly of a balance weight with a rotor element

Patent metadata

Field	Value
Publication number	US-9909424-B2
Application number	US-201414762065-A
Country	US
Kind code	B2
Filing date	Jan 23, 2014
Priority date	Jan 25, 2013
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

The balance weight is fixed to the flange of a rotor element by a pre-fixing screw with a conical head engaged into a conical counterbore having a shape complementary to the flange, which places the weight at a very accurate position before permanently fixing it by a clamping stud.

First claim

The invention claimed is:

1. An assembly of a balance weight with a rotor element, comprising a device for fixing the weight passing through the weight and a flange of the element, and a pre-fixing screw of the weight with a conical head, the pre-fixing screw extending through a drilling in the flange and into the weight, the drilling being provided with a conical counterbore at a face of the flange opposite to the weight, the conical counterbore accommodating the conical head,
wherein the device for fixing the weight is a stud for assembling the flange with a flange of a neighbouring rotor element.

2. The assembly of the balance weight according to claim 1 , wherein the stud comprises a leg flushing against the flange of the neighbouring rotor element on an opposite side of the weight.

3. The assembly of the balance weight according to claim 2 , wherein the flange of the element comprises a housing into which the conical counterbore opens and which accommodates the conical head and the leg.

4. The assembly of the balance weight according to claim 1 , wherein the flange of the element is fitted with a scalloping including a radial notch joining an inner edge of the flange to the drilling.

5. An assembly of a balance weight with a rotor element, comprising:
the balance weight fixed to a first flange of the rotor element;
a first assembly device configured to fix the first flange to a second flange of a neighbouring rotor element, wherein the first assembly device passes through the weight; and
a second assembly device having a rod and a countersunk head, wherein the second assembly device passes through the first flange but not the second flange, wherein the rod extends through the weight, and wherein the second assembly device is configured to hold the weight against the first flange.

6. The assembly according to claim 5 , wherein the second assembly device is a pre-fixing screw.

7. The assembly according to claim 6 , wherein the first assembly device is a stud.

Assignees

• Snecma

Inventors

• Douady Cyril
• Dejaune Claude Gerard Rene

Classifications

• F05D2260/31

  Retaining bolts or nuts · CPC title

• F01D5/027

  Arrangements for balancing (for balancing rotating bodies in general F16F15/32; for compensating imbalance G01M1/36) · CPC title

• F01D5/066 Primary

  Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps · CPC title

• F05D2260/96

  Preventing, counteracting or reducing vibration or noise · CPC title

• F05D2260/30

  Retaining components in desired mutual position · CPC title