JPH0464708A - Roll supporting structure - Google Patents

Abstract

PURPOSE:To reduce an amplitude of resonance by providing a vibration insulating ring member made of the rubber vibration insulator, which is compressed previously, between an inside holding ring and an outside holding ring to enable the setting of a primary resonance point at any position less than a range of the operating speech. CONSTITUTION:A fixed shaft 2 for supporting a shell 4 freely to be rotated through a bearing 3, which is divided in a required number, is supported by a housing 7 through vibration insulating ring members 8. This vibration insulating ring member 8 consists of an inside holding ring 5 and an outside holding ring 6 to be engaged with an end of the fixed shaft 2 for support and a rubber vibration insulator 10, which is compressed previously and provided between both the holding rings. Consequently, a resonance point of a roll 1 can be set at any position out of a range of the operating speed to enable the operation at high speed, and an amplitude of resonance can be reduced.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a roll support structure.

[Prior Art] In recent years, paper making machines, etc. have become wider and faster in order to improve productivity, and the various rolls installed in paper making machines are also becoming longer and rotating at higher speeds. or for this reason within the operating speed range (eoorpi ~1
150 rpm), a resonance phenomenon occurs in the roll, and the amplitude is particularly large at the center of the roll, causing problems such as adversely affecting paper quality, abrasion of constituent members, and noise.

In addition, since these rolls generally have a natural frequency, it is not possible to arbitrarily set a resonance point.For this reason, conventionally, as shown by the broken line A in Fig. 5, the primary resonance point where resonance occurs is Methods such as setting the operating speed range below (900 rpm or less) or raising the primary resonance point outside the operating speed range by using rolls with high rigidity have been adopted.

[Problems to be solved by the invention] However, in the conventional method of setting the operating speed range below the resonance point, there is a problem that productivity decreases, and in the method of using rolls with high rigidity, The problem is that the rolls have a large diameter and the entire device becomes large.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a roll support structure that can set the -order resonance point at an arbitrary position below the operating speed range and also reduce the amplitude of resonance. It is said that

[Means for Solving the Problems] The present invention is characterized in that both shaft ends of the roll are supported by a vibration isolating ring body in which vibration isolating rubber is pre-compressed between an inner holding ring and an outer holding ring. This relates to the support structure of the roll.

[Function] The roll supported by the vibration isolating ring body is vibration-isolated by the pre-compressed vibration isolating rubber, so that the position of the resonance point that occurs as the roll rotates moves to the lower rotation speed side, Moreover, the amplitude of the roll at this time is also reduced.

[Implementation example] Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention.

1 and 2 show a case in which the roll l is applied to support a fixed-shaft shell rotary roll l in a calendar, for example. The shell 4 is rotatably attached through the
It is made up of. Further, each of the shells 4 is connected by a connecting member 22.

The fixed shaft 2 is supported by a housing 7 via a vibration isolating ring body 8. The vibration isolating ring body 8 is attached to the fixed shaft 2
an inner retaining ring 5 for fitting and supporting the end of the housing 7, an outer retaining ring 6 for supporting the housing 7, and both retaining rings 5, 6.
If the vibration isolating rubber 10 is of an insulating type, it is constructed such that a ground 23 is connected to the fixed shaft 2.

Note that 9 in the figure indicates paper.

The vibration isolating ring body 8 is formed by molding a vibration isolating rubber 10 in a trickle so as to be integrated with the inner retaining ring 5 and the outer retaining ring 8, and as shown in FIG. The outer retaining ring 6 is
The diameter of the vibration isolating rubber IO is reduced and the vibration isolating rubber IO is pre-compressed so that it can withstand the weight of the roll 1 and the tension of the paper 9.

Incidentally, the precompression shown in FIG. 3 is applied in stages by dividing it into a required number of times.

As described above, according to the roll support structure equipped with the vibration isolating ring body 8, the resonance point 13 (for example, 975 rpm) that conventionally occurs with the rotation of the roll l can be fixed at the 5r1! J solid line B
As shown, the operating speed range [600 rpm ~ 1150 rpm]
The resonance point can be set at 13° at any position below (for example, 500 rpm), and therefore a high operating speed range without a resonance point can be ensured. Moreover, the amplitude of resonance of the roll 1 can also be reduced.

FIG. 4 shows another embodiment of the present invention, in which reference numeral 14 indicates a shaft-rotating roll.

The roll 14 is formed integrally with a rotating shaft 15,
Bearings 16 are attached to the outer periphery of both ends of the rotating shaft 15, and the bearings I6 are formed as shown in FIG.
It is fitted into the inner retaining ring 18 of the vibration isolating ring body 17 supported by the housing 20.

In the figure, 19 indicates an outer holding ring, and 21 indicates a vibration isolating rubber.

In the embodiment shown in FIG. 4, the diameter of the vibration isolating ring body 17 is larger than the diameter of the vibration isolating ring body 8 in the embodiments shown in FIGS. 1 and 2. Further, if the vibration isolating rubber 21 is of an insulating type, the earth 23 is grounded from the inner retaining ring 18.

Since the roll 14 is also supported through the vibration isolating ring body 17, the same effects as those of the embodiment shown in FIGS. 1 and 2 described above can be achieved.

As described above, since the rolls 1 and 14 are supported through the vibration isolation ring bodies 8 and 17, the resonance points of the rolls 1 and 14 can be set outside the operating speed range to ensure stable operation. In addition, by pre-compressing the vibration isolating rubber 10.21 of the vibration isolating rings 8 and 17, it is possible to prevent tensile load from being applied to the vibration isolating rubber 10.21 when the weight of the roll or the tension of the paper acts. This can be prevented and the life of the vibration isolating rubber 10.21 can be extended.

It should be noted that the roll support structure of the present invention is not limited to the above-mentioned embodiments, but can also be used to support rolls other than paper manufacturing machines, and the properties, hardness, shape, etc. of the vibration isolating rubber are The method of applying precompression to the anti-vibration rubber may be any other method other than those described above, and if the anti-vibration rubber is of an insulated type, it may be conductive instead of grounding. It goes without saying that a type of anti-vibration rubber may be used, and that various other changes may be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the roll support structure of the present invention, by supporting the roll through the vibration isolating ring, the resonance point of the roll can be placed at any position outside the operating speed range. Since it is possible to set a high operating speed, productivity can be stably improved. Furthermore, the amplitude due to resonance of the rolls can also be reduced.

Furthermore, since the resonance point can be lowered and the amplitude can be reduced, wear of the component parts and noise can be reduced, and since there is no need to use rolls with high rigidity, it has excellent effects such as preventing the equipment from becoming larger. It can be played.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a front view of FIG. FIG. 5, which is a sectional view of another embodiment of the invention, is a graph showing the relationship between roll rotation speed and operating speed and amplitude. In the figure, 1 and 14 are rolls, 2 and 15 are shafts, 5.18 is an inner holding ring, 6 and 19 are outer holding rings, 8.17 is an anti-vibration ring body, and 10.21 is an anti-vibration rubber.

Claims (1)

[Claims] 1) A roll support structure characterized in that both shaft ends of the roll are supported by a vibration isolating ring body in which vibration isolating rubber is pre-compressed between an inner holding ring and an outer holding ring.