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Design and Development of Sequential Rotary ValveValves are used to regulate the flow of fluids through systems. This rotary valve's main purpose is to fill, pressurize, empty, and vent three smaller tanks with the supply of one larger tank. Many different designs are being taken into consideration, which are each at different stages of development. The furthest along uses three ball valves on a common shaft to open and close their respective ports as the shaft completes one full rotation or cycle. We were tasked with advancing this design to its first test as a plastic model for flow verification, as well as sizing and ordering the necessary O-rings and fasteners. A motor will also be sized to satisfy the torque requirements, and will then be programmed using a Raspberry Pi to rotate the shaft at the calculated speed and dwelling times needed to fill each tank equally. In addition, we have also been advancing designs that use a camshaft and poppets. These are earlier on in their development, currently being sized to replicate the expected flow patterns of the rotary ball valve. Expected outcomes of this valve include bi-directionality, successful sealing under pressure, and accurate cycling.
Document ID
20180000868
Acquisition Source
Marshall Space Flight Center
Document Type
Presentation
Authors
D’Orsi, Nicholas
(Clemson Univ. SC, United States)
Castillo, Priscilla
(Texas Univ. Brownsville, TX, United States)
Date Acquired
January 31, 2018
Publication Date
December 15, 2017
Subject Category
Mechanical Engineering
Report/Patent Number
M17-6448
Distribution Limits
Public
Copyright
Public Use Permitted.
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