摘要:
An opening cylinder (1) for an open-end spinning device with a detachably fixed opening ring (2) which can be fixed by a torque-free rapid tension device (7) in a readily replaceable manner on a rotatably supported structural component of an opening cylinder (1) driven by an opening cylinder drive (4).
摘要:
An opening cylinder (1) for an open-end spinning device with a detachably fixed opening ring (2) which can be fixed by a torque-free rapid tension device (7) in a readily replaceable manner on a rotatably supported structural component of an opening cylinder (1) driven by an opening cylinder drive (4).
摘要:
The object of the invention is to provide a spinning machine which the manufacturing expenses and maintenance/checkout expenses are held down and the operation of the low voltage circuits is stabilized. In a spinning machine having a spindle motor control system, each three-phase power supply line is provided with a pair of conductive contacts electrically connected to at least two phases on the way thereof, and the pair of conductive contacts are structured to be separated when inserting an insulating unit therebetween and to come in contact with each other again when pulling out the insulating unit.
摘要:
Method and apparatus for detecting breakage in a yarn strand being wound onto a yarn support member rotatably driven by a DC motor and having a closed-loop motor control system for maintaining a desired velocity of the motor and for signaling commutation of the phases of the motor during the yarn winding operation. The closed-loop motor control system monitors the signal conduction angles delivered to commutate the phase windings of the motor, detects a sudden minimum preestablished decrease in the monitored conduction angles, and generates a control signal in response to a sudden decrease in the conduction angle resulting from a yarn strand breakage. The control signal may be employed to stop current supply to the motor.
摘要:
To regulate the speed of a plurality of asynchronous motors fed by a converter having a variable output frequency and output voltage and having a load-dependent slip, particularly asynchronous motors for driving spindles of a textile machine, the rotational frequency of several selected asynchronous motors is measured by means of respective digital frequency indicators. This measurement takes place in continuous repetition, always beginning simultaneously. The pulses of the frequency indicators are counted by means of respective first counters (1-6), all of which release a pulse when they reach the same counter condition. An OR circuit (13-17) connects the counter outputs with a second pulse counter (18) in such a manner that this condition is reached first by the output pulse released by the highest rotational frequency and then by the output pulses released by the second-highest rotational frequency, etc. When the second pulse counter (18) has counted a predetermined number of pulses, the last of which being released by the frequency representing the average speed value, the second pulse counter (18) produces an output pulse which results in all counters (1-6, 18) being reset. The one of the AND gates (25-30) to which the rotational frequency representing the average frequency value is applied is triggered to transmit the frequency signal to the converter.
摘要:
A ring spinning machine has a direct drive spindle rotatably supported by an upper bearing in a bolster and connected to a rotor of a spindle motor having an upper structure including upper coil end of a stator thereof. A ring is movable up and down along the spindle to guide a yarn to be wound on a bobbin carried by the spindle. The inside diameter of the ring is determined in relation to the size of the upper structure of the spindle motor such that the upper structure can be received at least partially in the ring when the ring is moved to the lower end of its vertical stroke. The length of the unsupported portion of the spindle is reduced to increase the critical or resonance speed of the spindle, thus enabling the spindle to operate at an increased speed.
摘要:
In a ring spinning or other textile machine with a multiplicity of thread-winding stations each including one or more variable-speed motors, a central controller supplies periodic or continuous timing signals to respective speed setters of all stations for a predetermined progressive speed change of the associated variable-speed motors. In a specific embodiment, the timing signals are recurrent pulses for the advance of identical programs of the local speed setters whereby the several stations will follow the same routine but with possible relative staggering in time, taking individual delays due to thread breaks or the like into account.
摘要:
A twisting spindle driven by an individual electric motor wherein fastening of the body of the motor as well as maintaining and guiding of the barrel of the spindle are effected via a rigid sleeve surrounding the barrel, the sleeve passing through the frame and serving as a cage for anti-friction bearings which permit rotation of the spindle, and having at its ends two collars, one fastened elastically to the frame and the other rigidly connected to the body or stator of the motor.