Alstom (switzerland) Ltd

Alstom Power N.v.

Jon R Cowburn

Robin Rhodes

Kurt M Fierle

Mark E Brophy

Michael Zakel

A semi-modular rotor module for an air preheater having a circular rotor includes a lug assembly having a lug front, a lug back spaced radially outward from the lug front, and cold end and hot end lug members. The lug front and lug back each extend longitudinally from a first end to a second end, with the cold end lug member being mounted to the first ends of the lug front and the lug back and the hot end lug member being mounted to the second ends of the lug front and the lug back. A single main diaphragm extends radially from an inner end portion to an outer end portion, with the inner end portion being mounted to the lug front on a first side of the lug assembly. The outer end portion is mounted to a rotor shell which is spaced radially outward from the lug back. At least one intermediate diaphragm extends radially from an inner end portion, mounted to the lug back at a position intermediate the first and second sides of the lug assembly, to an outer end portion mounted to the rotor shell.

Semi-modular rotor module

A method for constructing a rotor of an air preheater having a plurality of diaphragm plates dividing the rotor into a number of wedge-shaped compartments. Each compartment includes compartment components such as a rotor shell plate, a hot end rotor angle, a cold end rotor angle, and one or more stay plates and means for locating at least a portion of each of the components within the compartment. The diaphragm plates are manufactured by marking at least one index location associated with each compartment component on each diaphragm plate blank utilizing a template identifying the index locations and forming an opening at each index location. Each compartment is assembled by positioning a first diaphragm plate adjacent to a second diaphragm plate and locating each compartment component between the adjacent diaphragm plates by engaging the locating means of the component in an associated opening in one of the diaphragm plates. The locating means may comprise at least one tab extending from each of the sides of the compartment components. The tabs are inserted into the associated opening in one of the diaphragm plates to locate the component.

Method of making an air preheater rotor

A method for constructing a rotor of an air preheater having a plurality of diaphragm plates dividing the rotor into a number of wedge-shaped compartments. Each compartment includes compartment components such as a rotor shell plate, a hot end rotor angle, a cold end rotor angle, and one or more stay plates and means for locating at least a portion of each of the components within the compartment. The diaphragm plates are manufactured by marking at least one index location associated with each compartment component on each diaphragm plate blank utilizing a template identifying the index locations and forming an opening at each index location. Each compartment is assembled by positioning a first diaphragm plate adjacent to a second diaphragm plate and locating each compartment component between the adjacent diaphragm plates by engaging the locating means of the component in an associated opening in one of the diaphragm plates. The locating means may comprise at least one tab extending from each of the sides of the compartment components. The tabs are inserted into the associated opening in one of the diaphragm plates to locate the component. The locating means may alternatively comprise a plurality of pins which are inserted through the openings and mounted therein. The compartment components are located by positioning each component in engagement with one or more of the pins.

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Ulysses, PA, United States of America

Jon R Cowburn