SU1516537A1 - Loom warp stop motion - Google Patents

Abstract

The invention relates to textile machinery, can be used on weaving machines and allows for an increase in the quality of the fabric. When only one machine drive is operating, the shaft of the asynchronous motor 5 rotates at a frequency higher than the synchronous one, and the central sun wheel 7 of the planetary gear rotates at a certain speed at a certain speed of the carrier 8 of the second differential row. At the same time, the carrier 8, resting on the fixed wheel 26 and epicycle 10, rotating with the frequency specified by the commodity controller, rotates not only the shaft of the electric motor 5, but also epicycle 11, releasing the base niche at a certain speed. As the yarn coils off, the braking torque on the motor shaft is reduced by lowering the voltage on the stator windings using a special controller and together with the machine drive with smaller diameters, it rotates everything with a higher angular frequency, maintaining a constant linear feed rate of the warp threads. During operation of only one additional electric motor 5, when the driver 8 and the epicycle 10 stopped, the carrier 6 pushed away from the wheel 26 and the epicycle 10, through the rims 18, 19 and satellites 24, 25 rotates the epicycle 11 in the direction opposite to the rotation of the diagonal shaft 9 with a certain speed. Inside the cycle, the constant tension of the filaments is maintained by varying the voltage on the stator windings of the electric motor 5 according to the signals of the three-arm lever 2 deflection sensor, while the rotation speed of the epicycle 11 changes in one direction or another. 1 hp ff, 2 ill.

Description

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From 7, the planetary gear rotates at a certain speed at a certain speed of the carrier 8 of the second differential row. At the same time, the LED 8, resting on the stationary wheel 26 and epicycle 10, rotating with the frequency set by the merchandiser, rotates not only the shaft of the electric motor 5, but also epicycle 1 1, releasing the base niche at a certain speed. As the yarn coils off, the braking torque on the motor shaft is reduced by lowering the voltage on the stator windings by means of spe-. tsialyugo regulator and-together with the machine drive with smaller diameters of Bpaniaer, all with

angular frequency, maintaining a constant linear feed rate of the warp threads. When running only one additional motor 5 at. stopped by the carrier 8 and the epicycle 10, the carrier 6, pushing away from the wheel 26 and from the epicycle 10, through the rims 18, 19 and satellites 24, 25 rotates the epicycle

11 in the direction opposite to the rotation of the diaphragm 9 at a certain speed. Inside the cycle, the constant tension of the threads is preserved by varying the voltage on the stator windings of the electric motor 5 according to the signals of the three-arm lever 2 deflection sensor. At the same time, the rotation speed of the epicycle 1 1 i emen with into one side or the other, 1 з, п. f-ly, 1 ill.

The invention relates to textile machinery and can be used on weaving machines.

The aim of the invention is to increase the ec ecia} 11 ababyvaemon tissue by increasing the uniformity of the main threads coming off,

The drawing shows the kinematic main regulator of the weaver's weaving and the velocity picture of the moving elements of the speed control mechanism.

The main regulator of the weaving machine contains a rock 1, mounted on one of the arms of the three-arm lever 2, a tension sensor for the warp threads (not shown), made in the form of a U transform; moving the rock into an electric signal, a spring 3, one end of which is fixed on the second arm of the lever 2, and the second is connected to the base 4 of the machine, the diameter conversion sensor turns into an electrical signal (but shown), electric motor 5 connected electrically to the sensors, the frequency of which the shaft rotates is proportional to the total value of the electrical signals, and the differential consisting of a two-stage differential transmission and connected to it by means of the carrier 6 of the planetary gear, the central wheel 7 of which is connected to the shaft

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the electric motor 5, and the carrier 8 of the differential gear is mounted on the tool shaft 9 of the machine, Differenzig; The transmission unit additionally has two epicycles 10 and II, the first 10 of which are installed in the differential housing 12 with the possibility of free rotation and kinematically connected by means of an asterisk 13 and a chain transmission 14 to a valnom commodity controller (not shown), and the second 11 is installed with the possibility of free rotation on the machine tool shaft 9 and kinematically connected by means of a screw 15 and a worm gear 16 to the mechanism for releasing the warp threads, while the epicycles 10 and II are kinematically connected to each other, and the carrier 6 of the planetary gear and The differential gear transfer wheel 17 is mounted on the diaphragm shaft 9 for free rotation, the sun wheel 17 is double-crowned and has two rims 18 and 19, respectively. The kinematic connection between cycles 10 and I1 has blocks, each of which contains two the satellite axes for the first and second stages of the differential gear, the axis 20 of the first block of the satellite 21 and 22 is rigidly mounted on the carrier 6 of the planetary gear, and the axis 23 of the second satellite block 24 and 25 is mounted on the input carrier 8 differential gears with the possibility of free rotation515

Moreover, the satellites 21 and 22 of the first block are mounted on the axis 20 with the possibility of free rotation and engagement on one side of the satellite 21 with the central wheel 7 of the planetary gear, on the other - the satellite 22 with the crown 18 of the sun wheel 17 and with the first epicycle 10 of the differential gear, and the satellites 2A and 25 of the second block are rigidly mounted on the axis 23 and with the possibility of the engagement of one side by the satellite 24 with the second crown 19 of the sun wheel and with the second epicycle 11 of differential transmission.

The reference reactive moment in the transmission perceives the wheel 26 with internal gearing. The wheel 26 is fixed in the housing 12 and engaged with the satellites 21. Each separate pair is the central wheel 7 and the epicycle 11, the crowns 18 and 29 of the sun wheel 17, the satellites 21 and 22, the satellites 24 and 25, the epicycles 26 and 10 have such different numbers of teeth, which ensure that at the maximum frequency of rotation of the shaft of the electric motor 5, the smallest frequency of rotation of the epicycle - output central to the forest 11 at the maximum density of the weft fabric, i.e. at the minimum speed of the epicycle 10, in the case of using the asynchronous electric motor controller, the number of teeth of the movable transmission gears is chosen so that under the action of only one machine drive the motor shaft rotates at a frequency higher than the synchronous on the straight line mechanical characteristic in the generator (braking) mode of operation The electric motor in this case returns energy back to the network, the voltage on the windings of its stator is regulated by means of a regulator (not shown), due to nym navo with tow diameter.

Differential transfer chains are interconnected through the weft fabric weft and base thread feeding mechanisms, and the transfer inputs are connected to the shaft and through the electric motor to the thread tension and diameter sensors, in this case, full interconnection and mechanical reverse the connection between the inputs pereda376

chi and change ypomo. as the filing of the warp with the parameters of the controller. With such a closed mechanical sys- tem, the speed control mechanism: acquires the functionality of an automatic non-friction type variator that performs Encyclic-Free regulation, depending on the tension of the warp threads, and out-of-cycle regulation, depending on the signals from the sensors. The required adjustment range for this is not good, since it only covers a change in diameter from 940 to 150 mm, which can be transformed with a sensor and a special voltage regulator into a proportional change of torque on the shaft of an as-micron electric motor within those limits corresponding to the range change the frequency of rotation of the shaft on the straight-line section of the generator and motor modes of the working.

The main regulator of the weaving mill operates as follows.

During the work only the drive of the machine

the shaft of the additional asynchronous electric motor 5 for the drive of the regulator rotates at a frequency higher than the synchronous one, and the central solar wheel 7 of the planetary gear rotates at a speed V at a certain speed c of the carrier 8 of the second differential row. The speeds of sub-elements of pantographic and two-stage dis | ferential transmissions

for this case are shown in dashed lines. At the same time, the carrier 8 was supported by a fixed wheel 26 and an epicycle 10, which rotates at a frequency specified by the commodity controller when the weft tissue density is determined at the duck, at a relatively high torque, since it is connected to the PYKHO1SHM link of the mechanism. no change in the density of the fabric by duck, for example.

measures with valnom, rotates not only the shaft of the electric motor 5, but also the epicycle 11, the release of the warp yarn with a certain speed. The velocities of the epicycles 10 and 11 are indicated for this case by V, Q and V, respectively, drove Vjj and V.

As the yarn coils off, the braking torque on the motor shaft l decreases by decreasing

voltage on the stator windings using a special regulator. After the zero point of the axis of the mechanical characteristic, the electric motor 5 starts to work in the motor mode and, together with the machine drive with smaller diameters, rotates more and more angular frequency, keeping the feed speed of the warp threads constant. The rotational speeds of the moving elements of the transmission at the end of the linear portion of the mechanical characteristic in the propulsion mode of the electric motor 5 are shown by dash-dotted lines and denoted by I

V ;, V ,,., V; , U „and VH,.

When only one additional electric motor 5 is in operation, with the carrier 8 and the epicycle 10 6 stopped, pushing off the wheel 26 and the epicycle 10, rotates the epicycle through the satellites 18, 19 and 2A and 25

11 in the direction opposite to the rotation of the diaphragm shaft 9 at a speed

° The velocities of the movable transmission elements for this case are shown in solid lines. During the operation of one additional electric motor 5, the machine is refilled by winding the warp threads on the base, as well as tightening them during operation and setting up the machine,

Inside the cycle, the tension tension of the threads is maintained by varying the voltage on the stator windings of the electric motor 5 according to the signals of the three-arm lever 2 deflection sensor from the equilibrium position to a higher or smaller side. At the same time, the rotation speed of the epicycle wheel 11 changes P one way or another,

The moment of the asynchronous electric pulley 5 is proportional to quad-. voltage, therefore, the sensitivity and speed of the regulator are high, which ensures the restoration of the equilibrium position of the lever 2 inside the cycle, maintains the tension state with a minimum amplitude and frequency of oscillations of the lever

2 is in equilibrium

In addition, the regulator is a non-friction-type variator, acting directly permanently without breaking the kinematic chain, on the swinging speed of the output cable.

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The epicyclic forest 11, the Continuous regulator, in which the drive of the speed control mechanism is interconnected with the drive from the main shaft of the machine, establishes a rigid connection between the main shaft and the screw of the machine base release mechanism. Therefore, such a regulator does not lose the turning angles of the main shaft. Because of this, as well as due to the possibility of establishing a certain speed of rotation of the motor shaft by acting only with a machine drive, the latter restores, at the next start, the dynamic balance of the lever 2, spring 3 and rock 1, which existed at the moment the machine stopped. This prevents the occurrence of start-up strips during tissue production.

All movable elements of the regulator's transmission rotate in one direction (to the right), which sharply limits the influence of kinematic errors (backlash, dead run) from manufacturing inaccuracy. The absence of reverse sharply limits the time of the transient run-out from acceleration.

The main point on the release of the pre-tensioned warp threads is removed from the shaft, the bead, the additional motor is used only in the closing branch, in which there are insignificant moments reduced by the gear ratio of the planetary and differential gears. This, as well as the fact that the differential gear is made on the basis of David's gearbox with one external and one internal gearing having high efficiency, allows to choose a low-power asynchronous electric motor 0.06-0.09 kRt in the drive of the speed control mechanism, which reduces the size regulator power consumption in the network, the rotor flywheel mass. When selecting certain parameters of the gears of the peg controller regulator, it is possible to operate the electric motor in the generator mode with the return of part of the energy consumed by the drive of the machine back to the network. Constant electric motor. A current of the same power is more expensive and larger in size than an asynchronous electric motor. The DC motor due to the specificity of weaving should be Bbf

more complete in explosion-proof design, it has very low efficiency at low speeds of rotation of the shaft.

The invention makes it possible to drastically increase the quality (accuracy, sensitivity, stability, speed) of regulation, simplify the design of the main regulator, release the warp threads smoothly, which drastically reduces the breakage of the threads, noise and dynamic loads, and closes the fabric.

Claims (1)

Invention Formula 1, the main regulator of a weaving machine, containing a rock mounted on one of the arms of the three arms, lever tension sensors of the warp threads inside the machine’s work cycle and changing the radius of the warp; electrically connected to the sensors, and a differential consisting of a two-stage differential transmission and kinematically connected with it by means of a planetary carrier, the central wheel of which is connected to the shaft of the electric motor of the gearbox the speed of the release of the warp threads, and the carrier of the differential gear is installed on the stub shaft of the stanna 15a, so that, in order to improve the quality of the fabric produced by increasing the uniformity of the convergence of the main threads to the left, the differential gear has two additional epicycle, the first of o five 0 five 0 five 0 Which is installed in the differential case with the possibility of free rotation and kinematically connected with the valle of the product controller, and the second is installed with the possibility of free rotation on the machine dial shaft and kinematically associated with the mechanism for releasing the warp threads, while the epicycles are kinematically connected with each other, and the planetary carrier and the differential gear solar wheel are mounted on the spindle shaft with the possibility of free rotation, and the solar wheel is made with a two-cylinder one. 2, the Regulator according to claim 1, characterized in that the kinematic connection between epicycles has blocks, each of which contains two satellite-mounted axes for the first and second differential gear stages, while the axis of the first satellite block is rigidly mounted on the carrier planetary gear, and the axis of the second block is mounted on the carrier of the differential neper dacha with the possibility of free rotation, and the satellites of the first block are mounted on the axis with the possibility of free rotation and gearing, on one side with the central shaft on the other, with one of the crowns of the sun wheel and the first epicycle of the differential gear; and the satellites of the second block are rigidly mounted on the axis and with the possibility of engagement from one side with the second vena, the sun wheel and second stm- differential gear cycle.