摘要:
In an arrangement for casting films, extruded plastic material is discharged from a slot nozzle (1) and is chilled on the cooled circumferential surface (6) of a casting roll (2). The obtained film web (8) surrounds the casting roll (2) along a large angular spread and is lifted off the casting roll (2) by means of a withdrawing roll (3). The film web (8) has a certain distance from the lateral surfaces (7) of the casting roll such that lateral zones (25) in which polymer accumulates are formed on the circumferential surface (6) of the casting roll. A strip-type guiding part (10) that has a flexible linear member (11) is arranged in the zone of the circumferential surface (6) that remains free. The linear member (11) is fed from a supply reel (13) to a take-up reel (17) via a first (14) and a second deflection roll (15). The rotating casting roll (2) pulls the flexible linear member (11) towards the guiding part (10) as a result of the circumferential moving direction of the casting roll (2). The guiding part (10) moves in the longitudinal direction (12) thereof and cleans the circumferential surface (6) of the casting roll from polymer dust which particularly collects in the edge regions (25) of the casting roll (2).
摘要:
The aim of the invention is to obtain a plain weave and gauze weave in a textile that is to be produced, in one weaving cycle, thus economising in terms of expensive shed-forming elements. To achieve this, according to the invention, the plain weave (16) and gauze weave (15) are formed simultaneously in the textile (9) in one weaving cycle. To form the plain weave (16), the adjacent warp threads (1L,2L) that are used to form the upper shed and lower shed are alternately lifted by the same drop wire/needle shank (4) from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position. To form the gauze weave (15), only the warp threads (2D) that form the upper shed are raised in a known manner by the drop wire/needle shank (4) from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position.
摘要:
The aim of the invention is to optimize the electromotive driving torques and braking torques required in the starting and braking phase of the weaving and shedding machine while reducing the mechanical stress on machine elements of the weaving and shedding machine and while preventing starting marks in the fabric, and based on this, to obtain so-called soft starts and soft stops, in particular, of the shedding machine. To this end, the invention provides that, in a weaving machine equipped with an electromotive main drive and in a shedding machine equipped with an electromotive auxiliary drive, the shedding machine is started at a time t1 that occurs before the starting time of the weaving machine. In addition, the invention provides that in the instance of an activated interruption of the weaving process, the shedding machine comes to a stop at a time t5 that occurs after the stop time t4 of the weaving machine.
摘要:
The invention relates to an electrochemical fuel cell stack, comprising - at least one membrane-electrode unit consisting of an anode, a cathode and an electrolyte membrane arranged therebetween, - at least one gas distribution structure on the anode side with an anode gas entry zone, an anode gas exit zone, in addition to channels for guiding the anode gas from the anode gas entry zone to the anode gas exit zone, said anode gas containing hydrogen, - at least one gas distribution structure on the cathode side with a cathode gas entry zone, a cathode gas exit zone, in addition to channels for guiding the cathode gas from the cathode gas entry zone to the cathode gas exit zone, said cathode gas containing oxygen and water vapour, - a coolant distribution structure with a coolant entry zone, a coolant exit zone, in addition to channels for guiding the coolant from the coolant entry zone to the coolant exit zone. According to the invention, the coolant entry zone and the cathode gas exit zone overlap at least partially, in such a way that the water vapour can condense out of the cathode waste gas in this overlap zone.
摘要:
The invention relates to a high-temperature fuel cell system comprising at least two fuel cells which are connected to each other on the exhaust-gas side.
摘要:
The invention relates to a process for the routine detection of oil pollution and icebergs at sea and as an aid to navigation for seaborne traffic where there is a risk of collisions between ships and where icebergs may be present.
摘要:
Weaving machine (1) for producing a woven fabric (9) with shedding means (4) for alternately raising and lowering warp material (3) in order to form a shed (5), with weft insertion means (6) which are arranged in the warp direction in a stationary manner in a weft insertion zone (14) in order to insert a preferably tape-shaped weft material (7) into the shed (5), with draw-off means (8) for drawing off the finished material (9) in a drawing-off direction (AR), and with means (13, 10) for moving the material in the warp direction, by means of which means (13, 10) the selvedge (12) can be moved to and fro in a material movement range (WB) between an initial position (AG) which lies to the bottom and a collecting position (AH) which lies to the top, in order to bring the weft material (7) inserted last in each case into contact with the selvedge (12) in the collecting position (AH), characterized in that, furthermore, upper and lower limiting means (16) are provided which limit the opening of the shed (5), in that the limiting means (16) can be moved to and fro in the warp direction within a limiting-means movement range (BB) between an end position (EP2) which lies to the top and an end position (EP1) which lies to the bottom, and in that the limiting means (16) can be moved, at least counter to the drawing-off direction (AR), substantially without contact with the material (9) and/or a last-inserted weft material (7).
摘要:
Die Erfindung betrifft ein Verfahren zur Lärmreduzierung von Turbomaschinen mit Schaufelgittern sowie eine Rotor-Stator-Anordnung. Gemäss der Erfindung werden die an den Schaufelgittern auftretenden hydrodynamischen Druckschwankungen mittels Veränderung der Oberflächenumströmung mindestens eines Teils mindestens eines Stators reduziert und an einem oder mehreren Statoren sind Mittel zur Beeinflussung der Oberflächenumströmung mindestens eines Teils des Stators vorhanden. Die Aerodynamik des Stators kann durch Auslenkung einer oder mehrerer Schaufeln oder Teile davon verändert werden. Die Oberfläche einer oder mehrerer Schaufeln des Stators können auch Öffnungen zum Ansaugen und/oder Aufblasen von Luft aufweisen.
摘要:
The invention relates to a method for controlling at least one component executing a work function, for instance a weft yarn gripper (1), which serves as work equipment of a weaving machine. In the weft yarn gripper, the components (2) are mechanically pretensioned by a lever (5) that is actuated from the outside and a spring (6) that is configured in the form of an energy storage device and that is arranged in the body of the weft yarn gripper. A constructional element (9) that is connected to the components (2) is axially driven in an actuator (11) that exerts a clamping effect on the constructional element. The actuator (11) is controlled by an auxiliary energy in such a way that the components (2) are locked in the pretensioned positioned at a first point in time whereby the yarn trapper (4) is closed and at a second point in time pretensioning is released and the yarn trapper (4) is opened.
摘要:
Die Erfindung betrifft eine zerlegbare Brücke, mit Spurträgern (3), die als Fachwerkträger mit dreieckigem Querschnitt ausgebildet sind, wobei durch die zwei unteren, auf gleicher Höhe liegenden Ecken Untergurte (4) verlaufen, und durch die obere Ecke ein Obergurt (5) verläuft, sowie einer Fahrbahnplatte (6), welche die Fahrbahn der Brücke bildet. Gemäß der Erfindung ist die Fahrbahnplatte (6) auf den Obergurt (5) aufgesetzt und es sind Verbindungsmittel vorhanden, mit dem der Obergurt (5) kraftschlüssig und schubsteif an die Fahrbahnplatte (6) angeschossen werden kann.