Centrifuging Step-Screw Conveyor for Regolith Project

Metadata Updated: July 8, 2015

A variety of ISRU operations will utilize lunar regolith as feedstock. The proposed centrifuging step-screw conveyor concept will provide a well controlled robust, reliable, dust-free method of transporting loose regolith over short distances (up to 10's of meters) at any inclination angle, ranging from vertical-up to vertical-down. The method offers immediate variable flow-rate control, including complete reversal of the direction of the solids flow without changing the rotation rate of the conveyor drive. This novel approach for transporting loose granular solids can provide a reliable means of moving regolith from a lower to an upper hopper ? a stated NASA need for oxygen production from regolith. This SBIR project will demonstrate the feasibility of the basic variable-flow-rate centrifuging step-screw. Planned follow-on Phase-2 development will optimize the shape of the step-screw blades to minimize wear and power requirements and couple the basic step-screw with a reliable pre-screening method to reject material greater than 5mm in size. The unit could be sized for Oxygen production scale operations (50kg/hr) or for construction-scale operations (300kg/hr). This conveying technology has very low frictional losses compared to conventional screw conveyors. The basic modular design allows any number of individual modules to be Daisy-chained together, with arbitrary, abrupt, changes in angle from zero to 180[HTML_REMOVED]SUP[HTML_REMOVED]o[HTML_REMOVED]/SUP[HTML_REMOVED] at each module transition. Each succeeding leg can go at any arbitrary direction or inclination, even vertically up or down, always maintaining precise, adjustable solids flow control. Centrifuging step-screw conveyors could be used in any solids-transport situation where conventional screw augers, bucket elevators, or short conveyor belts are the current transport means being considered. The potential advantages include robust operation, and precise control of solids flow rates with minimal set of moving parts.

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

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References

http://techport.nasa.gov/home
http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf
http://techport.nasa.gov/fetchFile?objectId=6561
http://techport.nasa.gov/fetchFile?objectId=3456
http://techport.nasa.gov/fetchFile?objectId=3447
http://techport.nasa.gov/fetchFile?objectId=6584
http://techport.nasa.gov/fetchFile?objectId=6560
http://techport.nasa.gov/fetchFile?objectId=3448

Dates

Metadata Created Date April 9, 2015
Metadata Updated Date July 8, 2015

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date April 9, 2015
Metadata Updated Date July 8, 2015
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_8924
Maintainer
TECHPORT SUPPORT
Maintainer Email
Id {$oid: 55942aa2c63a7fe59b499734}
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 54c45118-52e0-4ef6-a951-59867e37a765
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2010-01-01T00:00:00Z
Homepage URL http://techport.nasa.gov/view/8924
Language en-US
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2015-03-12
Program Code 026:027
Publisher Hierarchy National Aeronautics and Space Administration > Space Technology Mission Directorate
Related Documents http://techport.nasa.gov/home, http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf, http://techport.nasa.gov/fetchFile?objectId=6561, http://techport.nasa.gov/fetchFile?objectId=3456, http://techport.nasa.gov/fetchFile?objectId=3447, http://techport.nasa.gov/fetchFile?objectId=6584, http://techport.nasa.gov/fetchFile?objectId=6560, http://techport.nasa.gov/fetchFile?objectId=3448
Source Datajson Identifier True
Source Hash 891331ad659b01ea9a23fa4b547a11715fe50fc4
Source Schema Version 1.1
Temporal 2010-01-01T00:00:00Z/2010-07-01T00:00:00Z

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