CN212831919U - Friction-free tension control unwinding device - Google Patents
Friction-free tension control unwinding device Download PDFInfo
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- CN212831919U CN212831919U CN202021587065.8U CN202021587065U CN212831919U CN 212831919 U CN212831919 U CN 212831919U CN 202021587065 U CN202021587065 U CN 202021587065U CN 212831919 U CN212831919 U CN 212831919U
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- tension
- roll paper
- frequency converter
- tension sensor
- asynchronous motor
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Abstract
The utility model relates to a printing trade auxiliary device. The tension control unreeling device has the advantages of being small in tension fluctuation, free of mechanical abrasion and free of influence on paper quality. The technical scheme is as follows: a tension control unreeling device without friction force comprises a cylindrical roll paper arranged on an unreeling shaft, a tension sensor arranged on a roll paper advancing path, and the roll paper unreeled from the cylindrical roll paper, passing through the tension sensor and then advancing to a processing area; the method is characterized in that: the device also comprises a three-phase asynchronous motor for driving the unreeling shaft, a frequency converter respectively and electrically connected with the tension sensor and the three-phase asynchronous motor, and a brake resistor for connecting an output current wiring port of the frequency converter.
Description
Technical Field
The utility model relates to a printing trade auxiliary device specifically is tension control unwinding device, can be used to printing paper production line and impregnated paper production line.
Background
The tension control unreeling device is important equipment in a printing paper production line and an impregnated paper production line; friction force control devices, such as friction plate brakes, electromagnetic clutches, etc., are most commonly used to increase or decrease the tension. In the later period of use, mechanical devices are abraded due to friction force, the fluctuation of a tension system is large, the printing paper or the impregnated paper is stretched and lengthened, and the printing paper and the impregnated paper are broken in severe cases.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of above-mentioned background art, provide a tension control unwinding device of no frictional force, the device should have that the tension is undulant little, no mechanical wear, can not influence the characteristics of paper quality.
The utility model provides a following technical scheme:
a tension control unreeling device without friction force comprises a cylindrical roll paper arranged on an unreeling shaft, a tension sensor arranged on a roll paper advancing path, and the roll paper unreeled from the cylindrical roll paper, passing through the tension sensor and then advancing to a processing area; the method is characterized in that: the device also comprises a three-phase asynchronous motor for driving the unreeling shaft, a frequency converter respectively and electrically connected with the tension sensor and the three-phase asynchronous motor, and a brake resistor for connecting an output current wiring port of the frequency converter.
The roll paper unwound from the cylindrical roll paper moves according to the path set by the roller group; the tension sensor is arranged in the roller group so as to sense the change of tension in time.
The tension sensor is connected with a signal input end of the frequency converter; and a wiring terminal of the three-phase asynchronous motor is connected with a frequency conversion signal output end of the frequency converter.
The utility model has the advantages that: the utility model not only ensures small tension fluctuation and does not influence the paper quality; and because there is no wearing part, the system stability is higher, is especially suitable for the higher tension unwinding device of speed.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a left-side view schematic diagram of the tension sensor in fig. 1.
Fig. 3 is a schematic diagram of the connection relationship of the intermediate frequency converter of the present invention.
Detailed Description
The following is a further description of the embodiments with reference to the drawings.
In the tension control unwinding device without friction force shown in the figure, a cylindrical roll paper 3 is mounted on an unwinding shaft driven by a three-phase asynchronous motor 4, and the roll paper 3-1 unwound from the cylindrical roll paper is sent to a processing area according to a path set by a plurality of rollers; these are all similar to current unwinding device structure.
The utility model discloses an improve, install tension sensor 2 on a set of gyro wheel (by three gyro wheel group that constitutes of setting up side by side, the gyro wheel group is installed according to conventional mode, three gyro wheel that sets up side by side promptly, the gyro wheel rim that is located the intermediate position is less than the common tangent line of two gyro wheel rims of head and the tail, the gyro wheel that is located the intermediate position like this can be at the tensile change of real-time perception stock form of during operation, so can be called the perception gyro wheel, as shown in figure 1) for detect the tensile change of stock form. The roll paper 3-1 unwound from the roll paper passes through the sensing roller and then goes to the processing area. The utility model is also provided with a frequency converter 5 for controlling the rotating speed of the three-phase asynchronous motor; the tension sensor is connected with the signal input end of the frequency converter, and the output current wiring port of the frequency converter is connected with a brake resistor 6.
A wiring terminal of the three-phase asynchronous motor is connected with a frequency conversion signal output end of a frequency converter; the current input end of the frequency converter is connected with the mains supply (a grounding wire PE, three phase wires L1, L2 and L3 are arranged in the frequency converter) through a knife switch 7.
The utility model discloses a theory of operation is: the utility model discloses a three-phase asynchronous motor replaces original friction brake equipment, and tension controller contrasts the tension signal that detects with the setting value, then controls motor torque through the converter. When the actual tension is greater than the set tension, the frequency converter outputs a driving current with accelerated frequency according to a control signal of the tension controller, and the motor enters accelerated motion; when the tension reaches the set tension, the frequency of the driving current output by the frequency converter is kept unchanged, and the motor moves at a constant speed; when the actual tension is smaller than the set tension, the frequency converter outputs a driving current with reduced frequency according to a control signal of the tension controller, and the motor enters a deceleration mode. When the frequent braking regeneration electric energy exceeds the direct-current voltage of the frequency converter, the frequency converter outputs the electric energy with overpressure to the braking resistor, and the electric energy is converted into heat energy to be consumed.
Claims (3)
1. A tension control unreeling device without friction force comprises a cylindrical roll paper (3) arranged on an unreeling shaft, a tension sensor (2) arranged on a roll paper advancing path, and a roll paper (3-1) unreeled from the cylindrical roll paper, passing through the tension sensor and then advancing to a processing area; the method is characterized in that: the device also comprises a three-phase asynchronous motor (4) for driving the unreeling shaft, a frequency converter (5) respectively and electrically connected with the tension sensor and the three-phase asynchronous motor, and a brake resistor (6) for connecting an output current wiring port of the frequency converter.
2. The frictionless tension control unwind apparatus of claim 1 further comprising: the roll paper unwound from the cylindrical roll paper moves according to the path set by the roller group; the tension sensor is arranged in the roller group so as to sense the change of tension in time.
3. The frictionless tension control unwind apparatus of claim 2 further comprising: the tension sensor is connected with a signal input end of the frequency converter; and a wiring terminal of the three-phase asynchronous motor is connected with a frequency conversion signal output end of the frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021587065.8U CN212831919U (en) | 2020-08-04 | 2020-08-04 | Friction-free tension control unwinding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021587065.8U CN212831919U (en) | 2020-08-04 | 2020-08-04 | Friction-free tension control unwinding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212831919U true CN212831919U (en) | 2021-03-30 |
Family
ID=75129998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021587065.8U Active CN212831919U (en) | 2020-08-04 | 2020-08-04 | Friction-free tension control unwinding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212831919U (en) |
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2020
- 2020-08-04 CN CN202021587065.8U patent/CN212831919U/en active Active
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