Topic
Paddle
About: Paddle is a research topic. Over the lifetime, 5649 publications have been published within this topic receiving 28389 citations.
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01 Sep 2019
TL;DR: The Probe Mounted Particle Injector (PMPI) as mentioned in this paper is a probe mounted on a PEEK paddle wheel hub that is driven by a piezo motor, due to the high magnetic fields, that rotates at 100 deg/s.
Abstract: Injection of low-Z powders into fusion plasma has been used to improve wall conditions, similar to the standard boronization process using diborane. Powder injection has the advantage of being much simpler, non-toxic, and efficient. The W7-X stellarator is planning on utilizing powder injection in long pulse discharges; a proof-of-principle test for horizontal injection into the plasma was conceived, a Probe Mounted Particle Injector (PMPI). The PMPI concept is developed using a polyetheretherketone (PEEK) paddle wheel hub that is driven by a piezo motor, due to the high magnetic fields, that rotates at 100 deg/s. This small PMPI fits into an envelope of 120 mm diameter × 150 mm long, a standard size for Multi-Purpose Manipulator (MPM). The device is housed in a carbon cup mounted on a retractable probe that can be placed near the plasma edge, enabling powder injection ˜4–8 cm radially into the boundary plasma. The feed for the paddle is via piezo electric actuator that vibrates a funnel filled with powder into a trough for the paddle to push. The 8 paddle arms, 35 mm long and 10 mm wide, are made from 0.38 mm thick PEEK which drag slightly along the powder-filled trough bottom, becoming a spring-loaded paddle which accelerates the powder upon release. Design challenges are the high ambient magnetic field, vacuum compatible materials, high temperature environment, limited rotary-drive options, and compact space. The design and testing of this new device will be presented.
9 citations
TL;DR: Both water level and paddle rotational speed had negative impacts on the short-circuiting index, while no correlation was observed when varying inlet flow rate, and the impact of water level variation on these parameters was unclear.
9 citations
Patent•
25 Nov 1998
TL;DR: In this article, a rotary drive train is mounted on a slidable support that is pivotally attached to an adjustment rod, which is used to adjust the amount of raw product deposited on the belt during each stroke.
Abstract: Apparatus for feeding and cooking raw product, such as shellfish and the like, in a continuous process. A preferred version of the apparatus includes a feed tank with raw product immersed in a bath. A conveyor follows an inclined path starting in the feed tank and exiting the surface of the bath to convey raw product out of the tank and through a cooking chamber. A feed control mechanism is provided to allow for accurate setting of product flow. The mechanism includes a rocking paddle extending just above the conveying surface of the conveyor. The paddle is linked to a rotary drive train by a linkage consisting of two pivotally attached arms. Rotation of the drive train causes the paddle to rock and deposit product on the conveyor during each stroke. The drive train is mounted on a slidable support that is pivotally attached to an adjustment rod. The other end of the adjustment rod includes an adjustment handle and a micrometer-style adjustment with clearly visible indicia for adjusting product flow. As the adjustment rod is rotated, the drive train translates and changes the reference angle between the two arms of the linkage, which moves the paddle closer or farther from the conveying surface to adjust the amount of raw product deposited on the belt during each stroke. A cover over the feed tank provides a seal to prevent cooking steam from escaping the cooking chamber through the feed tank.
9 citations
Patent•
17 Nov 2015
TL;DR: In this article, the stator of a direct-drive wind power generator was shown to be able to self-adaptively dry itself, the service life of permanent magnet poles is prolonged, an "insulation level reduction" of components inside the electric motor is prevented, and the risk that the electric motors is corroded by severe air flow is lowered.
Abstract: Disclosed are a permanent-magnet direct-drive wind power generator, a system and a stator thereof, wherein the stator comprises a stator bracket (1), a stator iron core (8) arranged on the peripheral wall of the stator bracket and a paddle side tooth pressing plate (6). The paddle side tooth pressing plate is arranged on a paddle side axial end face of the stator iron core. At least one first air hole (2) is formed in the peripheral wall of the stator bracket. At least one second air hole (5) is formed in the paddle side tooth pressing plate. The stator further comprises at least one air flow passage (9) used for linking the first air holes with the second air holes. The air flow passage penetrates through the interior of the stator iron core. The electric motor can self-adaptively dry itself, the service life of permanent magnet poles is prolonged, an "insulation level reduction" of components inside the electric motor is prevented, the risk that the electric motor is corroded by severe air flow is lowered, and insulation reliability is improved.
9 citations