Electric Rotating Turntables
August 20th, 2009
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Electric Rotating Turntables
Physics Problem, rotating turntable.?
An electric turntable 0.780m in diameter is rotating about a fixed axis with an initial angular velocity of 0.210revs/sec. The angular acceleration is 0.916rads/sec^2.
1. Compute the angular velocity after a time of 0.206s. (rev/s)
2. Through how many revolutions has the blade turned in this time interval? (rev)
3. What is the tangential speed of a point on the tip of the blade at time t= 0.206s? (m/s)
4. What is the magnitude of the resultant acceleration of a point on the tip of the blade at time t=0.206s?(m/s^2)
w[2] = w[1] + at
w[1] = 0.210 x 2.pi rad/s = 1.32 rad/s
w[2] = 1.32 + 0.916 x 0.206 = 1.51 rad/s = 0.24 rps
s = 1.32 x 0.206 + 0.5 x 0.916 x 0.206^2 = 0.29 rad = 0.046 rev
v = r.w[2] = 0.78 x 1.51 = 1.18 m/s
a = v^2/r = 1.18^2/0.78 = 1.79 ms^-2
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Untitled (rotating family)
Sanitary Bulk Bag Conditioner Introduced
BETHLEHEM, PA-- Flexicon Corporation has introduced a new Sanitary Bulk Bag Conditioner for loosening of bulk solid material that has solidified during storage and shipment, allowing bulk bag unloaders to discharge it through bag spouts.
The stainless steel conditioner features two hydraulic rams with specially-contoured end plates that press opposite sides of bulk bags.
An optional hydraulically-actuated, variable-height turntable allows conditioning of the bag at all heights on all sides. The number and pressure of hydraulic ram actuations, the height of the turntable, and the number of 90-degree rotations are user adjustable.
The sanitary model is intended for bulk bags containing solidified bulk food and other contamination-sensitive products that cannot be loosened using pneumatically-actuated flow promotion devices integral to bulk bag dischargers. Carbon steel models with durable industrial coatings are offered for general industrial applications.
The unit measures 87 in. (2210 mm) H X 133 in. (3378 mm) W X 78 in. (1981 mm) D, and accommodates bulk bags of all popular sizes. It is fully enclosed on all four sides for operator safety and includes full-height doors that are interlocked to disallow operation of the system when the doors are open.
The system controller and hydraulic pump can be mounted remotely or on the exterior of the safety cage, and require only an electrical power connection for operation.
The company also manufactures bulk bag dischargers with or without integral bulk bag conditioners, as well as bulk bag fillers, flexible screw conveyors, pneumatic conveying systems, manual dumping stations, drum/box tote dumpers, weigh batching systems, and automated plant-wide systems integrated with new or existing process equipment.
For information contact Flexicon Corporation, 2400 Emrick Blvd., Bethlehem, PA 18020-8006, 1-888-353-9426, www.flexicon.com.
About the Author
Flexicon Corporation is a world leader in the design and manufacture of bulk handling equipment and custom-engineered and integrated plant-wide systems that transport, discharge, fill, weigh, blend, deliver and/or feed a broad range of powder and bulk solid materials.
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