摘要:
The device comprises: means for advancing the yarns subjected to the action of motor devices controlled by frequency converters or changers (12a, 12b) supplied by a common direct current bus (17); a monitoring/control system (19) supplied by the same direct current bus; and means for processing the yarns provided in the form of power spindles (1a, 1b, 1c), particularly being subjected to the action of individual motor devices controlled by frequency converters or changers (11a, 11b, 11c). The power spindles (1a, 1b, 1c) are not supplied by the direct current bus, but are self-powered and autonomous. The set of yarn advancing elements are on the direct current bus (17) whose supply is maintained by a flywheel (13) so that the two systems are, in total, electrically independent, and only the value of the ramps of both avoids any voltage fault.
摘要:
Eine Bandablage für eine Karde umfasst gesteuerte (nicht geregelte) Drehstromgetriebemotoren (100,106,108) die von einem in der Karde vorgesehenen Frequenzumrichter (84) über die Speisefrequenz gesteuert werden.
摘要:
Die Ringspinn- oder Zwirnmaschine besitzt eine Absaugvorrichtung, welche verwertbare, aus dem Streckwerk stammende Materialien über einen Abluftkanal 11 abführt und in einem Filter 23 sammelt, während nicht wiederverwertbare Materialien über den Kanal 21 in einen Filter 25 gelangen. Wiederverwertbare Materialien können damit dem Produktionsprozess neu wieder zugeführt werden, ohne dass zusätzlicher Aufwand vorgenommen werden muss.
摘要:
In order to control the speed of the rotor of a three-phase, synchronous motor of a sinusoidal type (M) driving a yarn-winding drum (R) for feeding a yarn (F) to a user machine (MF) under a desired tension, the motor is controlled instant-by-instant as a function of the instant position of the rotor (θrif), which is calculated by integrating a reference speed value (ωrif) and deriving from the latter an excitation angular parameter for the motor.
摘要:
Systems and a method for forming carbon nanotubes are described. A method includes forming carbon nanotubes in a reactor, using a Bosch reaction. The carbon nanotubes are separated from a reactor effluent to form a waste gas stream. The feed gas, a dry waste gas stream, or both, are heated with waste heat from the waste gas stream. The waste gas stream is chilled in an ambient temperature heat exchanger to condense water vapor, forming a dry waste gas stream.
摘要:
A water vapour transport membrane comprises a nanofibrous layer disposed on a macroporous support layer, the nanofibrous layer coated with a water permeable polymer. A method for making a water vapour transport membrane comprises forming a nanofibrous layer on a macroporous support layer and applying a water permeable polymer to the nanofibrous layer. The water permeable polymer can be applied for so that the nanofibrous layer is substantially or partially filled with the water permeable polymer, or so that the coating forms a substantially continuous layer on one surface of the nanofibrous layer. In some embodiments of the method, the nanofibrous layer is formed by electro-spinning at least one polymer on at least one side of the porous support layer. In some embodiments, the support layer is formable and the method further comprises forming a three-dimensional structure from the water vapour transport membrane, for example, by compression molding, pleating or corrugating.
摘要:
Eine Kämmaschine (K) mit wenigstens einer Faserbandbildenden Einrichtung (209, 41) und einer Bandablage (42, KA) wird mit einem Streckwerk (2,110, 213) dadurch versehen, indem zumindest die Bandablage (42, KA) durch eine Baugruppe einer Strecke (1,S) zum Doublieren und Verstrecken von Faserbändern (40,F,52, 130) gebildet wird, wobei die Baugruppe (1,S) auch das Streckwerk (2,213) der Strecke umfasst.