JPH0441734A - Rotation roller for thermal treatment - Google Patents

Abstract

PURPOSE:To prevent the generation of vibrations on the high speed rotation of a roller by engaging the inner portion of the roller with the outer portion of a fixed cylindrical container for heating or cooling the roller through a fluid bearing. CONSTITUTION:A thermal medium C is fed into a container 2 through a pipe 19 disposed in the container 2 as shown in the arrow D and subsequently discharged through a discharging pipe 16 as shown in the arrow E to heat or cool the container 2. A cylindrical roller shell 1 is rotatably supported on the container 2 through a fluid bearing accompanied by the discharging flows H, and I of the fluid B to heat or cool the container 2 through a fine space formed between the container 2 and the roller shell 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rotating roller for heat treatment that heats or cools a yarn or sheet-like material wound around the roller.

[Conventional technology]

In conventional rotary rollers for heating or cooling by heating or cooling by winding threads or sheets, the roller is integrally fixed to a hollow rotary shaft that is rotatably supported, and one end of the rotary shaft is fixed to the rotary shaft. A fluid rotary joint is provided in the roller, and a heat medium is circulated inside the roller via the fluid rotary joint to heat or cool the outer periphery of the roller.

[Invention or problem to be solved]

However, in such conventional heat medium heated rotary rollers, the heat medium is supplied to the roller through a fluid rotary joint provided at one end of the rotary shaft, so the sealing part of the rotary joint wears out when rotating at high speed. There is a problem that the heating medium leaks.

Furthermore, since the heat medium circulates within the rotating roller, there is a problem in that the dynamic balance of the roller is disrupted and vibrations occur in the rotating roller.

[Purpose of the invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the durability of a heat treatment rotary roller during high-speed recirculation and to prevent vibration of the rotary roller.

[Means to solve the problem]

In order to achieve the above object, the rotary roller for heat treatment according to the present invention includes a cylindrical container for heating or cooling the roller, an outer circumferential surface of the cylinder serving as a heat treatment surface, and an inner diameter portion facing the outer diameter of the cylindrical container. The rotary roller for heat treatment is comprised of rollers coaxially and rotatably engaged, and has a fluid bearing formed in a circumferential gap in the engagement portion between the container and the roller.

[For production]

In the present invention, the inner diameter part of the roller is coaxially rotatably engaged with the outer diameter part of a fixedly installed cylindrical container that heats or cools the roller, and the heat medium is circulated within the rotating roller. The dynamic balance of the rollers is not disturbed.

In addition, a fluid bearing is formed in the circumferential gap of the engagement portion between the cylindrical container and the roller of the present invention, which provides high durability and low vibration during high-speed rotation.

Further, in the present invention, the heat of the heating medium in the fixedly installed cylindrical container can be transmitted to the roller through the small gap of the fluid bearing part, so that the temperature of the roller surface can be brought to a predetermined temperature.

The present invention can be applied to a heat medium heating roller in which a fixedly installed cylindrical container is provided with heat medium piping, and also to an induction heating roller in which an induction heating coil is provided in a fixedly installed cylindrical container.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a sectional view of a rotating roller heated by a heating medium for winding and cooling yarn.

A cylindrical container 2 is fixedly installed, and this container 2
A cylindrical roller shell 1 constituting a roller is rotatably supported.

The inner diameter part IC of the roller shell 1 and the outer diameter part 2g of the container 2 are engaged with each other with a small circumferential gap (10 to 30 μm in this embodiment).

Furthermore, the side plate 1b integrally formed on the front side of the roller shell 1 and the front side surface 2h of the container 2 have a minute axial clearance (
In this embodiment, the thickness is 10 to 30 μm. ) are engaged. Further, a flange 15 is fixed to the rear end surface of the roller shell 1 with bolts 14.
and the rear side surface of the container 2 are engaged with each other with a minute axial clearance (10 to 30 μm in this embodiment).

An annular air supply path 2f is formed inside the base of the cylindrical container 2, and an air supply pipe 21 is connected to the air supply path 2f of the cylindrical container 2 at a position outside the flange 15 described above.

Multiple lines from air supply path 2f (only one line is shown in Figure 1)
The air supply paths 2e are branched, and each air supply path 2e has nozzles 2a, 2b, 2 directed toward the aforementioned minute gap.
c is arranged, and compressed air supplied from the air supply vibrator 21 is supplied to the nozzle 2g.

2b and 2c include the inner diameter part IC of the roller shell 1, the outer diameter part 2g of the container 2, and the front side plate 1b of the roller shell 1.
Air is blown into the gap formed between the front side surface 2h of the container 2, the flange 15 fixed to the rear end surface of the roller shell 1 by bolts 14, and the side surface of the container 2.
It is evacuated like SI and constitutes a so-called hydrostatic air bearing.

The cylindrical container 2 is screwed onto the end face of a machine frame 5 with bolts 4, and within the machine frame 5 is a stator 11 with a coil 12 wound thereon.
is fixed coaxially with the machine frame 5.

A hollow boss 1a protrudes from the inner surface of the side plate 1b of the roller shell 1, coaxially with the roller shell 1, and a rotating shaft 3 is press-fitted coaxially with the boss 1a.
The tip of the rotating shaft 3 is fastened to the side plate 1b of the roller shell 1 by a washer 18 and a nut 17.

A rotor 13 is fixed to the rotating shaft 3 at an axial position corresponding to the stator 11.

A flange 7 is fixed to the right end of the machine frame 5 by bolts 6, and a cylindrical bushing 9 is elastically supported at the center of the flange 7, and the rear end of the rotating shaft 3 is engaged with the bushing with a small gap. That is, the bush 9 is swingably supported at its center by two O-rings 10, and is configured to absorb misalignment between the roller shell 1 and the hydrostatic air bearing. Also, Bush 9
is provided with a plurality of nozzles 9a, and compressed air supplied from an air supply vibrator 8 provided on the flange 7 is supplied to the nozzle 9a.
Air is blown out from the bushing 9 into the gap between the bushing 9 and the shaft 3, forming a static air bearing.

An exhaust hole 7a is formed in the flange 7, and the air exhausted into the machine frame 5 through the arrow H is exhausted to the outside through the exhaust hole 7a.

The inside of the cylindrical container 2 is hollow, and the heating medium (cooling water in this embodiment) supplied from the heating medium supplying vibrator 20 passes through the vibrator 19 protruding inside the container 2, as shown by the arrow. The heat medium is supplied into the container 2, and after cooling the cylindrical container 2, it is discharged through the heat medium discharge vibrator 16 as shown by arrow E.

The cooled cylindrical container 2 cools the roller shell 1 through a small gap.

Although the cooling roller has been described in this embodiment, the present invention can also be used as a heating roller by heating a heating medium.

In addition, although a sensor for detecting the temperature of the roller 1 is not used in this embodiment, a sensor is embedded in the roller 1 and the detected value detected by the sensor is taken out to the outside of the rotating body, and the temperature of the heating medium is changed according to the detected value. The supply amount or temperature may be adjusted.

In this embodiment, the roller (roller shell 2) is supported with respect to the cylindrical container using a static air bearing, but a dynamic air bearing or other gas or liquid may be used instead of air.

In this embodiment, the roller has a solid structure, but a heat vibrator may be embedded in the roller.

In this embodiment, a roller driven by a motor is used, but a freely rotating roller such as a separate roller may also be used.

〔Effect of the invention〕

Unlike conventional rotary rollers, the present invention does not use wear members such as fluid rotary joints, so there is no leakage of heat medium.
Can be rotated at high speed.

In addition, in the present invention, the heating medium does not circulate inside the rotating body, and even during high-speed rotation, the circulation of the heating medium does not disrupt the dynamic balance, and vibrations do not occur, and the heating and cooling of the high-speed rotating body is controlled. It becomes possible.

Since the cylindrical container that heats the roller and the roller shell are engaged with each other through a fluid bearing, they can be fitted with a small gap and the heat transfer efficiency is high.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the present invention applied to a rotating roller for winding and cooling yarn. 1... Roller shell, 2... Cylindrical container, 3...
Axis of rotation.

Claims (1)

[Scope of Claims] 1. A cylindrical container for heating or cooling a roller, the outer peripheral surface of the cylinder is a heat-treated surface, and the inner diameter is rotatably coaxial with the outer diameter of the cylindrical container. 1. A rotating roller for heat treatment, comprising a pair of rollers, and a fluid bearing is formed in a circumferential gap at an engaging portion between the container and the roller. 2. The rotating roller for heat treatment according to claim 1, wherein an axial gap is formed between the cylindrical container and the roller, and a fluid bearing is formed in the axial gap. 3. The rotating roller for heat treatment according to claim 1 or 2, wherein the cylindrical container is equipped with a heat medium pipe.