JPH04217558A - Turning roller - Google Patents

Abstract

PURPOSE:To secure a turning roller, with wrapped with filament, sheetlike bodies for feeding, that has such a bearing as being large in rigidity, high in characteristic frequency, wide in operating ranges, and resistible to high temperature. CONSTITUTION:An iron core 4 is installed in a roller shell 1 concentrically with this roller shell 1, while a turning shaft 2 is engaged with it at a minute clearance with the core 4 so as to have a supporting part by a fluid in the turning shaft 2 installed at both sides in holding an axial direction of the roller shell 1 in between, and the roller shell 1 is attached tight to one end of the turning shaft 2. Since a supporting portion of load can be made longer and a nearly uniform load acts on this supporting portion, the load per unit area acting on a bearing becomes lessened. Accordingly, a shaft diameter can be made larger, larger in shift rigidity and high in characteristic frequency even in a long roller shell 1 besides wider in an operating range are all securable. Therefore, this bearing is resistible to high temperature, whereas no lubricating oil is used.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a rotating roller for winding and feeding a yarn or a sheet-like object, and the rotating roller may be a rotating heating roller that heats the yarn or sheet-like object. .

0002

[Prior Art] In a conventional rotating roller or rotating heating roller, a rotating shaft is rotatably supported, a rotor of an electric motor is fixed to the rotating shaft, and bearings are mounted on both sides of the rotor in the axial direction. (rolling bearing or hydrodynamic bearing), a roller was fixed to one end of the rotating shaft opposite to the rotor, and an induction heater was further disposed coaxially inside the roller.

0003

[Problems to be Solved by the Invention] However, in such conventional rotating rollers, the rotor of the electric motor is fixed to the rotating shaft, and bearings (rolling bearings or hydrodynamic bearings) are arranged across the rotor. In the case of hydrodynamic bearings, since the roller is cantilevered to one end of a rotating shaft supported by the bearing, there is a problem that the load on the bearing becomes large and the hydrodynamic bearing seizes due to vibration or the like.

[0004] Furthermore, since there are restrictions on the outer diameter of the roller,
Bearing size is limited. Therefore, the shaft diameter becomes smaller and the natural frequency of the shaft becomes lower. For this reason, rotating rollers are now used in a steady operation range that exceeds their natural frequency.
When starting and stopping the rotating roller, vibration increases,
There were problems in that the bearings could be damaged or the frame could be vibrated, shaking adjacent weights and causing the threads to break.

In particular, when rolling bearings are used in rotating rollers equipped with heating devices, the bearings are located near the rotating rollers, and the rotating rollers are heated to high temperatures, causing deterioration of the lubricating oil and extremely shortening the bearing life. Becomes shorter. Particularly, in a rotating roller whose bearing is disposed inside a heater, the life of the bearing is significantly reduced.

[0006]

[Object of the Invention] Therefore, the object of the present invention is to provide a fluid bearing inside the roller, so that the bearing has high rigidity, has a high natural frequency even if it is long, has a wide operating range, and is resistant to high temperatures. Our goal is to provide bearings.

[0007]

[Means for Solving the Problems] In the present invention, a bearing box for a fluid bearing is disposed inside a roller coaxially with the roller, and rotating shafts are arranged on both sides of the roller with the axial center of the roller in between. The above object is achieved by a rotating roller, characterized in that the rotating shaft is engaged with the inner diameter part of the bearing box with a small gap so that a fluid supporting part is provided, and the roller is fixed to one end of the rotating shaft. achieve.

Furthermore, a rotating shaft coaxially disposed inside the roller and engaging the bearing box protrudes from the bearing box in a cantilevered manner in a direction opposite to the one end, and the protruding portion of the rotating shaft The effects of the present invention can be further enhanced by disposing a supporting part for a force in the thrust direction, or by fixing a rotor of an electric motor for driving the rotating shaft to the protruding end of the rotating shaft. I can do it.

The rotating heating roller according to the present invention has an induction heater disposed coaxially with the roller inside the roller, and the roller is driven by an electric motor. A bearing box of a fluid bearing is arranged in a shape, and a rotating shaft that engages with the inner diameter of the bearing box with a small gap is supported by a fluid supporting part of the rotating shaft on both sides of the axial center of the roller. The roller is fixed to one end of the rotating shaft, and a portion of the rotating shaft protrudes outside the roller in a cantilevered manner on the opposite side of the joint between the rotating shaft and the roller. The above object can be achieved by providing a rotating heating roller characterized in that a rotor of an electric motor for driving the rotating shaft is fixed.

In particular, the radial load support portions are disposed on both sides of the axial center of the roller, and the thrust direction force support portions are disposed between the radial support portion and the rotor. You can get better results by doing so.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a rotating heating roller for wrapping and heating yarn.

An iron core 4 is provided inside the roller shell 1 coaxially with the roller shell 1, and a coil 5 is spirally wound around the iron core 4 to form an induction coil, and an alternating voltage is applied to the induction coil. By doing so, an induced current is passed through the roller shell 1 to heat it. A plurality of holes are formed in the roller shell 1 in the axial direction, and heat pipes 6 are embedded in the holes to make the temperature of the outer peripheral surface of the roller shell 1 uniform.

A supporter 7 serving as a bearing box of the hydrodynamic bearing of the present invention is disposed inside the iron core 4, and a flange portion 7a located outside the roller shell 1 is formed at the right end of the supporter 7 in FIG. The flange portion 7a is supported by a bolt 13 on a frame 14 of the electric motor in a cantilevered manner.

The rotating shaft 2 is coaxially engaged with the supporter 7 with small gaps a and b. In this example, the diameter gap is set to 20 to 30 μm.

A compressed air supply port 23 formed in the flange portion 7a of the supporter 7, and a plurality of holes 3 extending in the axial direction of the supporter 7 through an annular groove 24 communicating with the compressed air supply port 23.
1. Furthermore, compressed air is blown into the gaps a and b through radial holes 25 and 26 communicating with the hole 31, causing the rotating shaft 2 to float, thereby forming a so-called radial fluid bearing.

In FIG. 1, the left end of the rotating shaft 2 has a tapered surface 2a, and the tapered surface 2a fits into a conical hole formed in the roller shell 1. A washer 8 is attached to the left end of the rotating shaft 2.
A nut 9 is fastened through the roller shell 1 to fix the roller shell 1.

A disk 10 is fixed to the opposite side of the rotating shaft 2 from the roller shell 1 with a nut 29 coaxially with the rotating shaft 2. Further, the side plate 11 is fixed to the flange portion 7a by bolts 12, and the disk 10 is sandwiched between the flange portion 7a and the side plate 11.
a and the disk 10 are engaged with each other with minute gaps c and d.

Compressed air is blown out from the plurality of axial holes 27 through the compressed air supply port 23 and the annular groove 24 in the gap c, and the compressed air supply port 23 and the hole 3 are in the gap d.
Compressed air is blown out from a plurality of holes 28 through 2, floats the disc 10 in the axial direction, and receives the axial load of the rotating shaft 2, thereby forming a so-called thrust fluid bearing.

Reference numeral 30 is an O-ring, and the flange portion 7
a and the disk 10, and functions as a seal for compressed air flowing into the hole 32. Hole 3 made in supporter 7
, 33, 34 and the holes 14a provided in the frame 14 function as exhaust ports for air blown into the gaps a, b, c, and d.

A taper 2b is formed at the end of the rotating shaft on the disk 10 side fixed to the rotating shaft 2. Electric motor rotor 17
is fixed to a cylindrical bush 18, and the bush 18 to which the rotor 17 is fixed is attached to the tapered portion 2b of the rotating shaft 2, and is tightened in the axial direction with a nut 20.

A coil 16 is provided inside the frame 14.
A stator 15 wound with a stator 15 is disposed with a predetermined gap from the rotor 17.

The rotor 17 and stator 15 constitute an electric motor, which is driven at a predetermined rotation speed by an inverter (not shown).

A cover 19 is placed over the right end of the frame 14 to prevent dust, and the cover 19 is fastened to the frame 14 with bolts 22.

Although the explanation has been omitted in this embodiment, a sensor for detecting the temperature of the roller can be attached by a well-known method. When directly measuring the temperature of the roller, a through hole may be formed in the rotating shaft 2, and a signal may be taken out from a rotating transformer disposed at the end of the rotating shaft 2 through a signal line. In this embodiment, the rotation axis 2
Although the shaft is solid, it can also be made hollow to reduce weight.

In this embodiment, the hydrodynamic bearing is a hydrostatic bearing, but a hydrodynamic bearing may be formed by forming grooves in the inner diameter of the rotating shaft 2 or the supporter 7, or in the disk 10, the flange 7a, or the side plate 11. .

In this embodiment, the roller shell 1 and rotor 17 are tapered fitted to the rotating shaft 2, but they may also be press-fitted to a straight shaft, or the roller shell may be fixed to the end face of the shaft with bolts. You can also do this.

FIG. 2 shows another embodiment, which is a rotating roller used as a yarn feed roller or a separation roller.

The present embodiment shown in FIG. 2 differs from the embodiment shown in FIG. 1 in that (1) the heater 5 is not provided, and (2) the heat pipe 6 is not embedded in the roller shell 1. , and others are similar to the embodiment shown in FIG. 1 described above, so further explanation will be omitted.

[0030]

[Effects of the Invention] According to the present invention, since the fluid bearings are provided inside the roller and on both sides of the roller with the axial center of the roller in between, the load supporting portion can be lengthened. The load per unit area that acts on the bearing is reduced because a substantially uniform load acts on the bearing (moment load does not act on it).

According to the present invention, since the shaft diameter can be increased, the rigidity of the shaft can be increased, and even a long roller can have a high natural frequency and a wide operating range.

According to the present invention, since no lubricating oil is used in the bearing and there is no deterioration in the performance of the bearing due to deterioration in the performance of the lubricating oil material due to high temperatures, the bearing is resistant to high temperatures. Also,
By disposing the thrust bearing between the radial support portion and the rotor, the outer diameter of the disk can be increased, and the bearing rigidity can be increased.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and showing a rotating roller for winding and heating a yarn.

FIG. 2 is a sectional view showing another embodiment of the present invention and showing a rotating roller used as a yarn feed roller or a separation roller.

[Explanation of symbols]

1 Roller shell 2 Rotation axis 7 Supporter a Micro gap b Micro gap

Claims (4)

[Claims] Claim 1: A bearing box for a fluid bearing is disposed inside the roller coaxially with the roller, and fluid support portions for the rotating shaft are disposed on both sides of the axial center of the roller. ,
A rotating roller characterized in that a rotating shaft is engaged with an inner diameter portion of the bearing box with a small gap, and the roller is fixed to one end of the rotating shaft. 2. A rotating shaft disposed coaxially inside the roller and engaging with a bearing box projects in a cantilevered manner from the bearing box in a direction opposite to the one end, and a protruding portion of the rotating shaft 2. The rotating roller according to claim 1, further comprising a support portion for supporting force in the thrust direction. 3. The rotary shaft protrudes from the roller in a direction opposite to the one end in a cantilevered manner, and a rotor of an electric motor for driving the rotary shaft is fixed to the protruding end of the rotary shaft. The rotating roller according to claim 1 or 2. 4. A rotating heating roller in which an induction heating heater is disposed coaxially with the roller inside the roller, and the roller is driven by an electric motor, wherein a fluid bearing is provided coaxially inside the heater. A box is disposed, and a rotating shaft that engages with the inner diameter of the bearing box with a small gap is provided, and fluid support portions of the rotating shaft are disposed on both sides of the axial center of the roller, The roller is fixed to one end of the rotating shaft, and the rotating shaft is driven to a portion on the opposite side of the joint between the rotating shaft and the roller and where the rotating shaft protrudes outside the roller in a cantilevered manner. A rotating heating roller characterized in that the rotor of an electric motor is fixed.