JPH073277U - Drive roll - Google Patents

Abstract

(57) [Summary] [Purpose] A mechanism that transmits the power from the motor to the shaft to rotate it is not required and is simple. [Structure] The shaft 11 is fixed. The fixed disk 13 with the flange 13a is fixed to both ends of the fixed shaft 11. Further, the fixed shaft 11 is provided with a coil device 18 by radially projecting iron cores 19 at a plurality of positions and winding a coil wire 20 around each of them. The heads 14 attached to both ends of the roll shell 16 are fitted and positioned outside the outer peripheral surface of the fixed disk 13. An insulating material 15b having a plurality of conductors embedded therein is attached to the inner peripheral surface of the roll shell 16, and an alternating current is applied to the coil wire 20 of the coil device 18 to rotate the roll shell 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drive roll that can be driven by itself among rolls used in presses, calendars, etc. of a paper machine.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 4, this type of drive roll has a shaft 3 of the roll 1 supported by bearings 3 at both ends, and a motor 5 and a speed reducer 6 are installed on a fixed base 4 to reduce the speed. In most of the machines, the shaft end of the roll 1 is connected to the output shaft of the machine 6 via the universal joint 7, and the power of the motor 5 is transmitted to the roll 1 via the shaft 2 to drive the roll 1. Is.

[0003]

[Problems to be solved by the device]

 However, since the above-mentioned conventional drive roll rotates the shaft 2, a universal joint 7 connected to the output side of the motor 5 is required, and a space for installing the motor 5 and the speed reducer 6 is required. Has become a big one.

Therefore, the present invention eliminates the need for a mechanism for transmitting power from a motor through a universal joint, and further provides a compact drive roll by eliminating the need for a motor and a speed reducer. To do.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has a roll shell rotatably arranged outside a fixed shaft so as to form a required space, and a plurality of roll shells along the axial direction of the fixed shaft in the space. Insulation in which a plurality of coil devices in which coil wires are wound around an iron core are installed at a location, the coil wires of the coil devices are connected to an AC power source, and a plurality of conductors are embedded in the inner peripheral surface of the roll shell. The material is attached and both ends of the conductor are short-circuited by short-circuit conductors.

[0006]

[Action]

 When alternating current is applied to the coil wire of multiple coil devices on the fixed shaft side to generate a rotating magnetic field, a rotating torque is applied to the conductor in the insulating material, so the roll shell is directly driven to rotate around the fixed shaft. .

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an embodiment of the present invention, in which a fixed disk 13 with a flange 13a is integrally formed on both ends of a fixed shaft 11 supported by fixed supports 12 at both ends. Mount the disc-shaped heads 14 having an inner diameter slightly larger than the outer diameter of the fixed discs 13 on the outer sides (outer circumferences) of the fixed discs 13 at the both ends, and fit the inner diameter parts to each other. As shown in FIG. 2 and FIG. 3, the cage rotor 15 having the insulating material 15b in which a plurality of conductors are embedded is fixed to the ring-shaped short-circuit conductors 15a at both ends is provided on the inner peripheral surface of the roll shell 16. The roll shell 16 is integrally attached, and both ends of the roll shell 16 are attached to the head 14 on the two fixed discs 13 with bolts 17 to form the roll main body 10. Form a space A between 11 and To do so.

In the space A, a plurality of coil devices 18 are radially arranged at appropriate intervals in the axial direction of the roll body 10. That is, at appropriate positions in the longitudinal direction of the fixed shaft 11, radial (three in the embodiment) iron cores 19 are projected in a rectangular direction at each position, and a coil wire 20 is wound around each iron core 19. The coil device 18 of the winding type is turned to form a small gap δ between the iron core 19 of the coil device 18 and the inner surface of the insulating material 15b on the side of the roll shell 16, and the roll shell 16 is rotated. To do so.

Although not shown, the coil wire 20 of each coil device 18 is guided into the fixed shaft 11 through a lead-in hole 21 into the hollow fixed shaft 11, and is connected to an AC power supply 22. An alternating current is introduced from the alternating current power source 22 to the coil wire 20.

When an alternating current is applied to the coil wire 20 of the plurality of coil devices 18 on the fixed shaft 11 to apply a rotating magnetic field, a rotating torque is applied to the conductor in the insulating material 15b, causing the roll shell 16 to rotate. Will be done. This eliminates the need for a mechanism to rotate the roll shaft from the motor via the power transmission shaft, enabling a compact roll design.

When assembling the drive roll of the present invention, the fixed disk 13 is fitted and fixed to the fixed shaft 11 so that the flange 13a is located inside, and the plurality of iron cores 19 are fixed and the coil is fixed. After winding the wire 20, a roll shell 16 to which a cage rotor 15 having a plurality of insulating materials 15b is attached is fitted so as to cover the coil device 18, and the head 14 is attached to the fixed shaft 11 from one end side thereof. Further, the other heads 14 are fitted from the other end side of the fixed shaft 11, and thereafter, the heads 14 and the roll shell 16 are assembled by bolts 17 or the like.

[0013]

[Effect of device]

 As described above, according to the drive roll of the present invention, since the shaft is fixed and the roll shell is rotated around the fixed shaft, the mechanism for transmitting the power of the motor to the shaft can be eliminated. The roll structure can be simplified, and the compact design of a roll having a long roll surface length can be achieved, which can provide excellent effects.

[Brief description of drawings]

FIG. 1 is a cut front view showing an embodiment of a drive roll of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a perspective view showing an assembled state of a ring-shaped short-circuit conductor and an insulating material forming a squirrel cage rotor according to the present invention.

FIG. 4 is a schematic diagram showing an example of a conventional drive roll power transmission system.

[Explanation of symbols]

 10 Roll Main Body 11 Fixed Shaft 13 Fixed Disc 14 Head 15 Cage Type Rotor 15a Ring-shaped Short-circuit Conductor 15b Insulation Material 16 Roll Shell 18 Coil Device 19 Iron Core 20 Coil Wire 22 AC Power Supply

Claims (1)

[Scope of utility model registration request] 1. A roll shell is rotatably arranged outside a fixed shaft so as to form a required space, and a coil wire is attached to an iron core at a plurality of positions in the space along the axial direction of the fixed shaft. Install a plurality of coil devices that are wound,
A coil wire of each coil device is connected to an AC power source, an insulating material having a plurality of conductors embedded therein is attached to the inner peripheral surface of the roll shell, and both ends of the conductors are short-circuited by short-circuit conductors. Characteristic drive roll.