JPS5835896Y2 - Roll net sealing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealing device for a rolling mill, etc., and relates to a roll neck sealing device that is easy to assemble and disassemble and has a durable structure.

Conventionally, this type of sealing device has been commonly used, and there is one in which a seal is formed between a plurality of ordinary oil seals attached to a seal end plate and the outer peripheral surface of a sleeve attached to a bearing.

The structural defects of these will be explained below with reference to the drawings.

In FIG. 1, a sleeve 202 is fixed to a rotating roll 201, and the outer circumference of the sleeve 202 and the inner circumference of a bushing 203 slide.

A chock 204 is attached to the outer periphery of the bushing 203, and an end plate 205 is fixed to the side surface of this chock with bolts.

The end plate 205 is hollowed out from the radial fixing part 205a, the outer cylindrical part 205b, and the inner cylindrical part 205c, and has a stepped part 206 on the inner periphery of the inner cylindrical part 205c, in which at least one oil seal 201 is installed. installed.

The sleeve extension 208 that slides on the lip of the oil seal 207 is fixedly bolted between the water seal ring 209 and the sleeve IJ-b 202.
A rubber ring 210 is provided on the inner periphery of this sleeve extension 208 and between it and the roll 201 .

This type of sealing device has many parts and is also heavy, so the oil seal 201 and rubber ring 2
Since the assembly and disassembly work of 10 also involves the work of replacing these attached parts, this assembly and disassembly work requires a large number of workers and long hours of labor.

That is, to attach and detach the oil seal 207, the water seal ring 209 is first removed, and then the end plate 2 is attached.
05 must be removed.

Furthermore, in order to remove the rubber ring 210, the sleeve extension 208 must also be removed.

In particular, since the water seal ring 209, end plate 205, and sleeve extension 208 are heavy, there is a problem in that they must be attached and removed using a transportation machine such as a crane.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and its main structure consists of a sleeve extension that is fixed to the sleeve and surrounds the shaft, and a sleeve extension that is fitted into the sleeve extension from the axial direction. a neck seal that seals the shaft; an end sleeve that fits into the sleeve extension from the axial insertion side of the neck seal to press the neck seal in the axial direction and has a circumferential surface; and a circumference of the end sleeve. The apparatus includes an oil seal that makes sealing contact with the neck seal, and a housing case that is fitted from the neck seal fitting side onto the chock seal side that fits the oil seal and rotates relative to the shaft.

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

FIG. 2 shows a roll neck sealing device of the present invention, in which a sleeve 302 is fitted onto a roll shaft 301 and rotates simultaneously.
The outer circumferential surface of the pushing ring 303 slides and rotates on the inner circumferential surface of the pushing ring 303. Furthermore, a chock 304 is provided on the outer circumferential surface of the pushing ring 303.

Furthermore, a scale seal 306 that is in sealing contact with the end surface of the roll is attached to the annular end ring 305 attached to the end surface of the chock 304, and a housing case is fitted onto the inner peripheral surface from the axial direction and fixed with bolts. 307 are attached to each.

This housing case 301 has a flange portion at one end, and forms a cylindrical portion from there.

Furthermore, three oil seals 308 are provided on the inner peripheral surface of this cylindrical portion.
The inner peripheral surface opposite to the oil seal insertion side is bent in the inner diameter direction like a stopper.

Three oil seals 308 are fitted onto this inner peripheral surface with spacers 309 interposed therebetween.

Further, a sleeve extension 310 is fixed to the end surface of the sleeve 302, and a neck seal 311 is fitted into the sleeve extension 310 from the axial direction.
7%0-It is installed in sealed contact with the runnet.

It has a flange portion 320 that fixes the neck seal 311 in the axial direction from the fitting side of the neck seal 311, and an inner peripheral surface that fits into the sleeve extension 310 and an inner diameter seal lip 313 of the oil seal 308.
a cylindrical portion 32 with an outer circumferential surface 312 in sealing contact with the cylindrical portion 32;
The end sleeve 314 consisting of the neck seal 311
It is fitted into the sleeve extension 310 from the insertion side and fixed with bolts.

Furthermore, the joints of each of these parts are sealed with 0.
- 'J Jung is installed.

That is, the sleeve 302 and the sleeve extension 310
There is an O-ring 316 between the housing case 30 and
There is a 0-ring 318 between γ and the end ring 305.
However, there is an O between the chock 304 and the end ring 305.
- A ring 319 is installed to seal each joint.

By configuring the present invention as described above, the present invention achieves the following effects.

The neck seal 311 can be attached and removed by simply removing the end sleeve 314 in the axial direction without removing any other parts.

Similarly, the oil seal 308 can be installed and removed simply by removing the housing case 307.

Therefore, unlike the conventional sealing device shown in FIG. 1, there is no need to remove several other parts, making it easy to attach and detach the oil seal and neck seal.

Furthermore, since the fitting method is adopted from the axial direction, the positioning between each member is accurate, and since there are no structurally protruding parts, it is not affected by centrifugal force, and the mounting part is less prone to looseness. effective.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional roll neck sealing device, and FIG. 2 is a sectional view of a roll neck sealing device according to an embodiment of the present invention. 302... Sleeve, 303... Pushing, 3
04...Chock, 305...End ring, 30
7... Housing case, 308... Oil seal, 310... Three-1 extension, 311...
...Neck seal 312...Circumferential surface, 314...
End sleeve.

Claims (1)

[Scope of utility model registration request] A sleeve extension 310 that is fixed to the sleeve and surrounds the shaft, and a neck seal 311 that is fitted into the sleeve extension from the axial direction and seals the shaft.
, an end sleeve 314 that fits into the sleeve extension from the axial insertion side of the neck seal to press the neck seal and has a circumferential surface 312; an oil seal 30 that makes sealing contact with the circumferential surface of the end sleeve.
8; and a housing case 30γ that is fitted from the side into which the neck seal is fitted onto the side of the chock 304, into which the oil seal is fitted and rotates relative to the shaft.