Headshaft

Patent metadata

Field	Value
Publication number	US-9751029-B2
Application number	US-201314419282-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Aug 9, 2012
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Disclosed are apparatus and methods for treating wastewater. In one example there is provided a wastewater treatment system. The wastewater treatment system comprises a settling basin having a first sidewall and a second sidewall, a first headshaft mount disposed on the first sidewall, a second headshaft mount disposed on the second sidewall, a headshaft comprising a shaft extending between and engaging the first headshaft mount and the second headshaft mount and including a bull sprocket and a collector headshaft sprocket.

First claim

What is claimed is:

1. A settling basin of a wastewater treatment system, the settling basin comprising:
a first sidewall and a second sidewall;
a first headshaft mount disposed on the first sidewall;
a second headshaft mount disposed on the second sidewall;
a single piece headshaft including a composite shaft extending between and engaging the first headshaft mount and the second headshaft mount, a journal bearing disposed within the shaft proximate a first end thereof, and a key slot defined in the shaft, the key slot extending only partially into the journal bearing and extending between a bull sprocket and a collector headshaft sprocket mounted on the shaft; and
a single key element configured to be retained in the key slot and to secure both the bull sprocket and the collector headshaft sprocket to the headshaft.

2. The settling basin of claim 1 , wherein the shaft is hollow.

3. The settling basin of claim 2 , wherein the first headshaft mount comprises a hollow stub post disposed within a bore of the journal bearing.

4. The settling basin of claim 3 , wherein the journal bearing is in direct contact with the hollow stub post.

5. The settling basin of claim 1 , wherein the shaft is a solid shaft.

6. The settling basin of claim 5 , further comprising journal bearings disposed within recesses formed at ends of the shaft.

7. The settling basin of claim 1 , wherein the shaft has a cross sectional area which varies along a length of the shaft.

8. The settling basin of claim 7 , wherein the shaft includes a central section with a cross sectional area less than that of an end section of the shaft.

9. The settling basin of claim 1 , wherein the composite shaft comprises a polymer matrix composite with one of metal particles, polymer particles, or ceramic particles embedded in a polymer matrix.

10. The settling basin of claim 1 , wherein the composite shaft comprises a nylon matrix composite.

11. The settling basin of claim 1 , wherein the single key element is disposed within the key slot.

12. The settling basin of claim 11 , further comprising a first fastener passing through a flange in the bull sprocket into the single key element and a second fastener passing through a flange in the collector headshaft sprocket into the single key element.

13. A headshaft for a settling basin of a wastewater treatment system, the headshaft comprising a single piece shaft formed of a composite material and including a first end and a second end, the first end configured to engage a headshaft mount disposed on a first sidewall of the settling basin, the second end configured to engage a headshaft mount disposed on a second sidewall of the settling basin, the headshaft further comprising a journal bearing disposed within the shaft proximate the first end a key slot defined in the shaft, the key slot extending only partially into the first journal bearing and extending between a bull sprocket and a collector headshaft sprocket mounted on the shaft, and a single key element configured to be retained in the key slot and to secure both the bull sprocket and the collector headshaft sprocket to the headshaft.

14. A method of facilitating installation of a headshaft in a settling basin of a wastewater treatment system, the method comprising:
measuring the width of the settling basin;
selecting a headshaft having a length appropriate for mounting within the width of the settling basin;
providing the headshaft including a single piece shaft formed of a composite material and including a first end and a second end, the first end configured to engage a headshaft mount disposed on a first sidewall of the settling basin, the second end configured to engage a headshaft mount disposed on a second sidewall of the settling basin, the headshaft further comprising a journal bearing disposed within the shaft proximate the first end a key slot defined in the shaft, the key slot extending only partially into the first journal bearing and extending between a space for mounting a bull sprocket and a space for mounting a collector headshaft on the shaft, and a single key element configured to be retained in the key slot and to secure both the bull sprocket and the collector headshaft sprocket to the headshaft.

15. The method of claim 14 , further comprising mounting the bull sprocket and the collector headshaft sprocket on the shaft.

16. The method of claim 15 , further comprising installing the headshaft in the settling basin.

17. The method of claim 15 , comprising mounting both the bull sprocket and the collector headshaft sprocket on the shaft with the single key element.

Assignees

• Evoqua Water Tech Llc

Inventors

• Selle William H

Classifications

• B29C70/06

  Fibrous reinforcements only · CPC title

• B01D21/20 Primary

  Driving mechanisms · CPC title

• F16C3/02

  Shafts; Axles · CPC title

• B01D21/04

  with moving scrapers · CPC title

• Y10T29/49826

  Assembling or joining · CPC title