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Semi-modular rotor module

Imported: 24 Feb '17 | Published: 06 Jan '04

Mark E. Brophy, Robin B. Rhodes, Michael Zakel, Jon R. Cowburn

USPTO - Utility Patents

Abstract

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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention may be better understood and its numerous objects and advantages will become apparent to those skilled in the art by reference to the accompanying drawings in which:

FIG. 1 is a general perspective view of a conventional rotary regenerative air preheater;

FIG. 2 is an exploded view of a portion of a conventional semi-modular rotor showing the shop assembled modules and the field installed components ready to be moved into position and attached to each other and to the rotor shaft;

FIG. 3 is a top view, partly broken away, of a rotor module assembly in accordance with the invention, with a portion of an adjacent rotor module shown in phantom;

FIG. 4 is a cross section view, taken along line

4

4 of FIG. 3;

FIG. 5 is an enlarged end view of the lug assembly of FIG. 3;

FIG. 6 is an enlarged cross section view, taken along line

6

6 of FIG. 3;

FIG. 7 is an enlarged top view, partly in phantom, of the cold end lug of the lug assembly of FIG. 6; and

FIG. 8 is an enlarged top view of the hot end lug of the lug assembly of FIG.

6.

Claims

1. A semi-modular rotor module for an air preheater having a circular rotor, the rotor module comprising:

2. The rotor module of claim 1 comprising a plurality of intermediate diaphragms mounted in circumferentially spaced relationship to the lug back, the inner end portion of the intermediate diaphragm circumferentially spaced furthest from the main diaphragm being mounted to lug back at the position intermediate the first and second sides of the lug assembly.

3. The rotor module of claim 1 wherein the lug front and the lug back are each rectangular plates having an arcuate shape, the lug front and lug back being substantially coaxial.

4. The rotor module of claim 3 wherein the cold and hot end lug members each have an outboard edge having an arcuate shape, the outboard edges being substantially coaxial.

5. The rotor module of claim 1 wherein the lug assembly also includes a plurality of circumferentially spaced stiffening plates, each stiffening plate extending longitudinally between the cold end lug member and the hot end lug member and radially between the lug front and the lug back.

6. The rotor module of claim 5 wherein each of the stiffening plates has longitudinally opposite first and second edges mounted to the cold and hot end lug members, respectively, and radially opposite third and fourth edges mounted to the lug front and the lug back, respectively.

7. The rotor module of claim 5 wherein the lug assembly also includes a plurality of longitudinally spaced stiffening members, each of the stiffening members extending circumferentially between a one of the stiffening plates and an adjacent one of the stiffening plates and radially between the lug front and the lug back.

8. The rotor module of claim 7 wherein each of the stiffening plates has circumferentially opposite first and second edges mounted to the stiffening plates, respectively, and radially opposite third and fourth edges mounted to the lug front and the lug back, respectively.

9. The rotor module of claim 1 further comprising a cold end seal extension extending longitudinally from the cold end lug member and a hot end seal extension extending longitudinally from the hot end lug member.

10. The rotor module of claim 1 further comprising a plurality of radially spaced stay plate assemblies extending circumferentially between the main diaphragm and the intermediate diaphragm.

11. The rotor module of claim 1 further comprising a plurality of radially spaced stay plate assemblies extending circumferentially between the main diaphragm and the intermediate diaphragm and a plurality of radially spaced stay plate assemblies extending circumferentially between the each intermediate diaphragm and an adjacent intermediate diaphragm.

12. A semi-modular rotor module for an air preheater having a circular rotor, the rotor module comprising:

13. A circular rotor for an air preheater comprising: