JPH0322595Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the invention of a bearing sealing mechanism, which can be easily installed and removed from a roll bearing in a rolling mill or a continuous casting machine, and which can be attached to the back of the base of the sealing body. It forms a stable mounting relationship with the housing, which is a fixed member, and also protects the bearing part using a bearing by ensuring a favorable dustproof or waterproof sealing effect, and has low frictional resistance when rotating the shaft and has a simple configuration. The objective is to provide a sealing mechanism with stable sealing action and high durability.

Dust from the working atmosphere enters the roll bearings of rolling mills, continuous casting machines, etc., and this dust adheres to the bearings, impairing their smooth rotation performance and accelerating wear. Therefore, it seems that some efforts have been made to form a seal mechanism to prevent dust from entering the bearing, but these conventional systems do not necessarily have the ability to accurately prevent dust from entering. However, devices that effectively prevent this dust from entering have a complicated structure, are difficult to handle, and both the shaft and sealing material wear out due to shaft rotation, resulting in insufficient durability. There are disadvantages and disadvantages such as not being able to In addition, there is a tendency for this type of sealing mechanism, especially with regard to the sealing part, to be unable to obtain a stable setting or seal if the sealing part is simply made of rubber, and a metal or other pressure shell is bonded to this. Often,
In such products, the elastic shell and the rubber seal are not necessarily integrated, and even if adhesive is used to bond them together, the adhesive has poor heat resistance. It has the disadvantage that it easily peels off from the adhesive under such high-temperature conditions, limiting its use. In particular, since the elastic force of the elastic shell acts on the sealing portion for the rotating shaft, there is a strong tendency to interfere with the operation of the rotating member, and the wear described above results in extremely poor durability and significant deterioration of sealing performance.

The present invention has been devised to improve the disadvantages and shortcomings of the conventional ones as described above.The concrete embodiments of the present invention are explained as shown in the attached drawings. A seal member having a cross-sectional structure as shown in the figure and integrally molded continuously into a ring shape as shown in FIG. 2 is used. That is, as shown in FIG. 1, the seal member 1 molded from rubber or soft synthetic resin has a base portion 1a on the outer diameter side that is gradually thickened on the inner side, and has a base portion 1a with a width on one side. A V-shaped recessed part 2 reaching more than half of the direction is formed, and a sealing lip 3 is provided on the inner diameter side of the recessed part 2, with the thickness being approximately equal from at least the middle part to the tip side, which is gradually thinned from the base part 1a. A flat seal surface 4 is formed on the joint surface of the shaft material of the seal lip 3, and a part of the recess 2 of the seal body 1 is provided with a flat seal surface 4 as shown in FIG. A rod-shaped elastic ring member 5 having a notch 6 is embedded therein. The substantially uniform thickness of the seal lip 3 on the distal end side may be such that it becomes thinner, for example, by about 10% as it approaches the distal end side, as shown in FIG.

In addition, roll 10 of such a product according to the present invention
The state of attachment to the roller is as shown in FIG.
In other words, the oil seal 9 is also formed with a recessed part 12, and a rod-shaped elastic ring member 15 is embedded in the base thereof, and a seal lip 13 is used.
The shaft portion 10a of the roll 10 is connected to the housing 1 by interposing a bearing or the like on the side of the oil seal 9 facing the seal lip 13.
1 to be rotatably supported.

According to the present invention as described above, the deep concave portion 2 extends over half or more of the width direction of the seal body 1.
is formed, and a seal lip 3 is provided on the inner diameter side of the recessed portion 2. Therefore, the seal body 1 has a thickened base and a diameter reduction of the elastic ring member 5 embedded in the base. After mounting, the diameter expansion elasticity allows the housing 11, which is a fixed member, to be stably mounted to the inner part of the shaft mounting portion and held at a predetermined position. In other words, under the condition that the base is stably held against the fixed member (housing), the tip of the seal lip 3, which is set in an enlarged diameter state during shaft mounting, can be effectively made of rubber only by using the structure of the recessed part 2 as described above. It has an elastic sealing effect, and the tip side of the flat sealing surface 4 is appropriately curved and joined to the roll shaft 10a.In other words, it has an elastic effect when set due to only the rubber material and a surface contact with a certain area. However, since the contact pressure distribution at this time of setting is approximately equal thickness as mentioned above, it is maximum at the tip of the seal lip 3, and decreases as it gets deeper into the recessed portion 2, and the contact pressure distribution at the tip becomes smaller. An effective intrusion exclusion effect can be obtained, and when intrusion pressure acts on the recessed part under this contact pressure distribution condition at the time of setting, this intrusion pressure uniformly increases the contact pressure, and as a result, the roll axis is always In any case, it is tightly bonded to the surface 10a, and in any case, an appropriate effect of preventing the intrusion of dust or moisture such as cooling water can be obtained. Moreover, no forced pressure is applied by the ring member 5 to the rotating shaft. Furthermore, there is almost no increase in the load when the roll 10 rotates, and there is no concentrated heat generation, so the seal lip 3 does not suffer from burning cracks or the like due to the concentrated load, and the amount of wear is minimal, for example. It has the effect of increasing the durability several times compared to conventional ones when applied to support of slabs in continuous casting equipment, guide rolls, etc. In addition, it is relatively compact and can be used as guide rolls, etc. Even if an elastic ring member 5 is used, a special adhesive is not required because the ring member 5 is embedded in the seal body 1 made of heat-resistant rubber; However, since the temperature of the outside world does not directly act on the adhesive, a sealing mechanism with excellent heat resistance can be obtained, and this is a highly effective idea in practical terms.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a cross-sectional view of the seal member of the present invention, Fig. 2 is a partially cutaway front view showing its general configuration, and Fig. 3 is a view of the bearing section. FIG. 3 is a cross-sectional view showing a bonded state. In these drawings, 1 is the seal body, 1a is its base, 2 is a recess, 3 is a seal lip, 5 is a rod-shaped elastic ring, 6 is a cutout thereof, 10 is a roll, 10a is a shaft thereof, 11 indicates the bearing housing.

Claims (1)

[Scope of utility model registration request] In a ring-shaped integral continuous seal body 1 to be interposed between the shaft portion 10a and the bearing housing 11, the seal body 1 has a V-shaped recess extending over half of its width on one side. It has a base that forms an inlet 2 and has a base that is gradually thickened on the inner side on the outer diameter side thereof, and also has a notch 6 in a part on the inner side of the recessed part 2 of the seal body 1. A rod-shaped elastic ring 5 is embedded therein, and a seal lip 3 is formed on the inner diameter side of the seal body 1 of the recessed part 2, with the thickness being equal from at least the middle part to the tip side, and gradually becoming thinner than the base part. A bearing sealing mechanism characterized in that a flat sealing surface 4 is formed on the shaft material joint surface of the sealing lip 3.