Daniel T Mollman

US Patent:

20040202544, Oct 14, 2004

Filed:

Apr 8, 2003

Appl. No.:

10/409392

Inventors:

Thomas Henning - Cincinnati OH, US
Gert van der Merwe - Monroe OH, US
William Ruehr - Cincinnati OH, US
Daniel Mollman - Cincinnati OH, US

International Classification:

B63H001/20

US Classification:

416/21900R

Abstract:

A method and apparatus for assembling a rotatable machine is provided. The machine includes a plurality of blades that extend radially outwardly from a rotor. The method includes determining a moment weight of each blade in a row of blades, determining a geometric parameter of each blade in the same row of blades, and determining a mapping order of each blade using the moment weight and the geometric parameter. The apparatus includes a computer system that includes a software product code segment for minimizing imbalance in a bladed rotor wherein the segment is configured to receive a moment weight value for each blade to be installed in said rotor, receive a geometric parameter value for each blade to be installed in said rotor, calculate a blade location on the rotor based on the received values, and generate a blade map based on the calculated location.

US Patent:

20200102853, Apr 2, 2020

Filed:

Sep 28, 2018

Appl. No.:

16/145759

Inventors:

- Schenectady NY, US
Kishore Budumuru - Bangalore, IN
Nicholas Joseph Kray - Mason OH, US
Daniel Edward Mollman - Mason OH, US

International Classification:

F01D 21/04
F01D 5/14
F01D 5/18

Abstract:

A blade for a propulsion apparatus. The blade includes a body having opposed pressure and suction sides. The blade extends in span between a root and a tip and the blade extends in chord between a leading edge and a trailing edge. The blade includes a fracture structure that is defined within the body and positioned such that it is spaced-away from the tip. The fracture structure includes at least one chamber. A first fracture wall is disposed between the at least one chamber and the pressure side, and a second fracture wall is disposed between the at least one chamber and the suction side. The fracture structure is configured to fail when a predetermined force is applied to the tip such that the tip separates from the remainder of the body.