JPH11248004A - Rotary seal mechanism of roll neck part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To nullify wasteful man-hours and time for replacement, rearrangement, etc., by establishing a seal of a rotary shaft bearing part effectively and properly in the high speed rotation at a high temp., for example a hot rolled roll bearing part, preventing wear and denaturation of the sealing material and leakage of lubricating oil, and thereby enhancing the durability. SOLUTION: A seal mechanism is to be fitted in a neck part between the body 2 of a roll and a shaft, and is composed of an elastic seal member 1, a fixing part 3 confronting lip parts 11 and 12 installed opposingly on the elastic seal member 1, and an inner ring 4 and taper sleeve 5 formed opposingly on the two sides of the seal member 1. The middle part and/or the joining end part of the lip parts 11 and 12 opposing so as to join with the fixing frame 3 on the two sides of the frame 3 are made in thinner wall gradually, and a groove as oil sump is formed at the forefront of the joint.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary seal mechanism for a roll neck portion, which rotates at a high speed like a rolling roll bearing portion in a hot rolling mill or the like, and seals the rotary shaft bearing portion under high temperature conditions. Effectively and appropriately, and prevent deterioration of the seal material due to wear and tear, prevent leakage of lubricating oil, improve durability, and achieve the above-mentioned characteristics sufficiently without using unnecessary man-hours and time for replacement maintenance etc. Is to achieve.

[0002]

2. Description of the Related Art It is indispensable that a lubricating oil for smooth rotation of roll bearings operated under high temperature conditions such as a hot rolling mill is indispensable. It is clear that the liquid is constantly supplied, and there are a lot of oxides, metal dusts and debris associated with the high-speed operation, and such solids are repeatedly subjected to collision and adhesion to the gap. Accordingly, various studies and proposals have been made on dust-proofing or sealing mechanisms for the bearing portion under such conditions.

[0003] That is, for this purpose, the so-called moogoyle bearings have been put into practical use in various ways, and have been introduced in steel handbooks and the like. For example, JP-B-48-41479, JP-A-53-9959, The details have been disclosed in Japanese Patent Application Laid-Open No. 53-48157 and recently disclosed, for example, in Japanese Patent Publication No. 2-1322 and Japanese Patent Publication No. 3-80.
No. 565, Japanese Patent Publication No. 4-51244, and No. 6
No. 0-25283, Japanese Utility Model Publication No. 4-420003,
There is Japanese Utility Model Publication No. 5-4881.

[0004] That is, among these materials, the configuration of the elastic neck seal material disclosed in Japanese Patent Application Laid-Open No. 53-9959 is formed by forming a stepped portion on the tip end side with respect to a base having an equal thickness. The lip portion, which has been greatly reduced and reduced in thickness so as to be less than half, is projected in an inclined manner.
No. 03 discloses a lip portion having a substantially equal thickness from a base portion to a tip portion.

[0005]

Although the above prior arts have achieved the respective technical effects, the cooling water is inevitably required under the high temperature conditions as described above. And lubricating oil are used in combination, and the seal material wears, solidifies, cracks,
There is no technology that can inevitably cause permanent deformation due to such abrasion or heat, ensure preferable durability, and accurately prevent the inflow of cooling water and the outflow of lubricating oil.

[0006] Further, as a seal against a play space which is adopted so as to enable rotation between the rotating part and the fixed part, it effectively follows a slight run-out between the two parts. Although it is necessary to seal, under a high-speed rotation condition, the follow-up action of the sealing material such as rubber cannot effectively follow the vibration, indicating a state in which the seal material is opened only by the runout amount, so-called, A mouth opening phenomenon occurs. In other words, if the step is formed on the tip side with respect to the base and the wall thickness is greatly reduced, the tip will float and the mouth will open. On the other hand, if the tip has a substantially equal thickness, it will be twisted by high-speed rotation. Is difficult to accurately follow. In addition, it is natural for the seal surface to appropriately store oil and the like, and it is preferable to use a soft touch as much as possible because of the durability and lubricity as described above. Under these conditions, it is very difficult to satisfy these requirements and to obtain a preferable sealing action.

[0007] Particularly, in the case where only the tip portion is sharply thinned or the tip portion is made equal in thickness, the hardness is clearly remained as a whole and the rigidity is high. It is apparent that the sliding portion is hard to receive, and when subjected to permanent deformation due to sliding heat, there is a disadvantage that an accurate sliding contact with the sliding portion cannot be obtained due to hardening, so that leakage is likely to occur.

[0008]

SUMMARY OF THE INVENTION The present invention has been studied to solve the above-mentioned problems in the prior art, and is operated under high temperature and high pressure conditions, such as a hot rolling mill, and at a high speed. While satisfying the soft touch in the clear working state, it succeeded in properly achieving the preferable prevention of cooling water intrusion, the prevention of lubricating oil outflow, and the improvement of the durability of the sealing material, as follows. It is.

(1) A mechanism mounted on a neck portion between the roll body and the shaft portion, the fixing portion facing a resilient seal portion and a lip portion opposed to the resilient seal portion, and An inner ring and a tapered sleeve are provided on both sides of the elastic seal member, and an intermediate portion or a joint end portion of the lip portion provided on both sides of the fixed frame so as to be connected to the fixed frame is gradually formed. A rotary seal mechanism for a roll neck portion, wherein the thickness is reduced and an oil sump groove is formed at the joining tip.

(2) The lip joint surfaces of the elastic seals formed on both sides of the fixed frame are inclined at an obtuse angle with respect to the intermediate axis of the fixed frame. (1) wherein the end-side central axis has an acute angle inclined inward with respect to the fixed frame intermediate axis, and the lip-part distal end-side joining surface is parallel to the rib central axis. The rotary sealing mechanism of the roll neck portion described in the paragraph.

(3) The lip joint surfaces of the elastic seal members formed on both sides of the fixed frame are flat surfaces perpendicular to the intermediate axis of the fixed frame, and the base ends of the lip portions on both sides of the elastic seal member. (1) wherein the side central axis is parallel to the fixed frame intermediate axis, and the joint surfaces on the tip side of the lip portions are obtuse angles inclined outward with respect to the rib central axis. The described roll neck rotary seal mechanism.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, a specific embodiment of the present invention as described above will be described. FIG. 1 and FIG. 2 show a roll roll and the like in a hot rolling mill. The end portion of the rotary roll body 2 forms a tapered portion 21 and is pressed against the fixed bearing portion inserted into the bearing fixing frame 3 via the elastic sealing portion 1 and the elastic sealing portion against the tapered portion 21. Numeral 1 is received by the tapered sleeve 5, and a protruding rib portion 31 is formed on the bearing surface side of the fixed frame 3, or the rib 1 is located in the intermediate concave portion 15 of the sealing material 1 without forming such a rib portion 31. Is formed.

As described above, the elastic sealing member 1 interposed between the bearing fixing frame 3 and the tapered portion 21 of the rotary roll 2.
Are provided with elastic reinforcing members 7 and 9 formed by coil springs, and are provided with parallel lip seal portions 11 and 12 on both sides of the projecting portion 31 projecting in the middle of the fixed frame 3.
Each of the lip seal portions 11 and 12 has a thinner lip shape on the distal end side than the intermediate portion, and is joined to the bearing fixing frame 3 so that the lip seal portions 11 and 12 are provided with flexibility on the distal end side from the intermediate portion so that the lip seal portions are outside. Are sequentially curved. Further, preferably, a plurality of cut grooves 16 are provided on the distal end side joining surface of the lip-shaped seal end, and the cut grooves 16
It is configured such that a curved joint can be made in a state where the joint remains properly without being collapsed.

The lip seal portion 11 located as described above
An inner ring 4 is disposed on the end face side of the rotary roll 2, and an end 14 of the inner ring 4 is inserted and set into a base of a drain lip 17 formed on one side of the sealing material 1.
A holding ring 8 is set at the base of the lip seal portion 12, and a joint end 18 protruding from the other side of the sealing material 1 is combined with the action of the elastic reinforcing member 9 as described above. Thus, the tapered surface 21 is press-contacted to the distal end side, and in combination with the tapered sleeve 5, the portion is stably sealed.

That is, when the lip seal portions 11 and 12 are sequentially curved and joined from the middle portion to the tip end as shown in the figure, a soft-touch surface seal that is softly joined is formed. The sealing action against water is greatly improved. In addition, the soft touch reduces excessive heat generation during sliding, prevents solidification and burning cracking of the lip itself due to heat, and reduces wear of the sealing material. In addition, the inside of the cut groove 16 forms a pool of lubricating oil on the sliding surface of the lip, and the lubricating oil is appropriately pressed out in combination with the pump action accompanying the deformation of the cut groove 16 during sliding. As a result, lack of lubrication of the contact surface and excessive heat generation are suppressed and reduced.

1 and 2, the joining surfaces 32, 32 on both sides of the rib 31 of the fixing frame 3 form an obtuse inclined surface with respect to the center axis of the rib 31. On the other hand, as shown in FIG.
The center axes of 1a and 12a have an acute angle inclined inward with respect to the center axis of the rib portion 31, and the front end side joining surfaces 11b and 12 of the lip seal portions 11 and 12 are formed.
b is formed so as to be parallel to the center axis of the rib portion 31.

That is, the lip seal portion 11 as described above,
12 are fixed frame 3
Of the sealing portions 11 and 12 are pressed into the joining surfaces 32 and 32 of
1 and automatically set from the state shown in FIG. 2 to the state shown in FIG. 1 with the opening curve curved, thereby forming a stable sealing relationship.

FIGS. 3 and 4 show another structural relationship of the present invention, in contrast to the above-described configuration shown in FIGS. 3 and 4, the joining surfaces 32a, 3a, 3b on both sides of the rib 31 in the fixed frame 3 are shown.
2a has a flat surface formed at right angles to the center axis of the rib portion.
In FIGS. 1 and 12, as shown in FIG. 4, the joining surfaces 11b and 12b on the distal end side from the intermediate portion are inclined outward with respect to the axis of the rib portion 31, and the central axis on the proximal side is parallel to the central axis of the rib portion. It is a thing.

That is, also in the case shown in FIGS. 3 and 4, the front end joints of the lip seals 11 and 12 are pressed against the joint surfaces 32a and 32a and are pushed in, so that the lip seals 11 and 12 are pressed. Is joined to the joining surface 32a under the operating condition of the inclination and is guided so as to slide outward, and is curved and inclined outwardly from the state of FIG. It is clear that a stable sealing relationship is formed. In addition, in the joint sealing state as shown in FIG. 3 obtained as described above, the tips of the lip seal portions 11 and 12 are press-sealed against the series of planar joint surfaces 32a and 32a. It was confirmed that the degree of adhesion was higher than in the cases of FIGS.

According to the present invention as described above, there is provided a mechanism mounted on a neck portion between the roll body and the shaft portion, the elastic seal portion and a lip portion opposed to the elastic seal portion. The elastic seal portion is stably set between the fixed frame, the inner ring, and the tapered sleeve so that the elastic seal portion is stably supported between the fixed frame, the inner ring, and the tapered sleeve. be able to.

The intermediate portion or the joining end portion of the lip portion opposed to the fixing frame on both sides of the fixing frame is gradually thinned, and an oil sump groove is formed at the joining tip portion. Due to the formation, the fixed frame and the elastic seal body are accurately fitted and set, and the lip portion provided on the elastic seal body is bent from the middle part to the fixed frame, and the seal body curves well from the middle part. The lubricating oil is stored in the oil sump groove, and it is appropriately supplied to the shaft surface to suppress and reduce excessive heat generation during sliding. Let me know.

Further, in the present invention, the joint surfaces of the lip portions of the elastic seal portions formed on both sides of the fixed frame are inclined surfaces inclined at an obtuse angle with respect to the intermediate axis of the fixed frame. An elastic seal against the fixed frame is achieved by the base end side central axis having an acute angle inclined inward with respect to the intermediate axis of the fixed frame, and the joining surfaces of the lip portions on the distal end side being parallel to the rib center axis. The above-described sealing relationship is automatically formed by assembling the parts, so that the above-described operation can be easily obtained.

In the present invention, the joint surfaces of the lip portions of the elastic seal portions formed on both sides of the fixed frame are planes perpendicular to the intermediate axis of the fixed frame, and the bases at the lip portions on both sides of the elastic seal portion are provided. A series of flat ribs is formed by the end center axis being parallel to the fixed frame middle axis and the lip tip end joining surfaces being obtuse angles inclined outward with respect to the rib center axis. The front end side of the lip seal portion is press-sealed with respect to the joint surfaces of the fixed frames on both sides of the portion to form and secure a sealed state with high adhesion.

[0024]

According to the present invention as described above, a soft touch state in which a high-speed rotating roll bearing portion such as a hot rolling mill is stably and effectively supported by a bearing and an effective adaptability is ensured. In addition, the sealing effect against lubricating oil and cooling water has been greatly improved, and the lubricating oil on the shaft surface has been appropriately stored and supplied to the shaft surface to appropriately suppress and reduce lubrication shortage and excessive heat generation. As a result, it is possible to provide a highly durable and stable bearing mechanism, and therefore it is clear that the invention has an industrially significant effect.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a tightening setting state of one configuration of a bearing seal mechanism according to the present invention.

FIG. 2 is a cross-sectional view showing a released state of an elastic seal member shown in FIG.

FIG. 3 is a partial cross-sectional view illustrating another configuration of the bearing seal mechanism according to the present invention in a tightening setting state.

FIG. 4 is a cross-sectional view showing a released state of the elastic seal member shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elastic seal part 2 Rotary roll main body 3 Fixed frame 4 Inner ring 5 Taper sleeve 6 Seal body 7 Elastic reinforcing material (coil spring) 8 Pressing ring 9 Elastic reinforcing material (coil spring) 11 Lip seal part 11a Lip seal part base end side 11b Tip side joining surface of lip portion 12 Lip seal portion 12a Base end side of lip seal portion 12b Tip side joining surface of lip portion 13 Oil cutting lip 14 Inner ring end portion 15 Intermediate concave portion 16 Cut groove 17 Drain lip 18 Joining end 21 Tapered part 31 Rib part 32 Joint surface on both sides of rib part

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 26, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006] Further, as a seal against a play space which is adopted so as to enable rotation between the rotating part and the fixed part, it effectively follows a slight run-out between the two parts. Although it is necessary to seal, under a high-speed rotation condition, the follow-up action of the sealing material such as rubber cannot effectively follow the vibration, indicating a state in which the seal material is opened only by the runout amount, so-called, A mouth opening phenomenon occurs. In other words, if the step is formed on the tip side with respect to the base and the thickness is greatly reduced, the tip will float and the mouth will open. On the other hand, if the tip has a substantially equal thickness, the run-out due to high speed rotation will occur. Is difficult to accurately follow. In addition, it is natural for the seal surface to appropriately store oil and the like, and it is preferable to use a soft touch as much as possible because of the durability and lubricity as described above. Under these conditions, it is very difficult to satisfy these requirements and to obtain a preferable sealing action.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

As described above, the elastic sealing member 1 interposed between the bearing fixing frame 3 and the tapered portion 21 of the rotary roll 2.
Are provided with elastic reinforcing members 7 and 9 formed by coil springs, and are provided with parallel lip seal portions 11 and 12 on both sides of the projecting portion 31 projecting in the middle of the fixed frame 3.
Each of the lip seal portions 11 and 12 has a thinner lip shape on the distal end side than the intermediate portion, and is joined to the bearing fixing frame 3 so that the lip seal portions 11 and 12 are provided with flexibility on the distal end side from the intermediate portion so that the lip seal portions are outside. Are sequentially curved. The Setsukomimizo 16 on the tip side bonding surface of such a lip seal end 1
One or a plurality of cut grooves 16
It is configured such that a curved joint can be made in a state where the joint remains properly without being collapsed.

Claims (3)

[Claims] 1. A mechanism mounted on a neck portion between a roll body and a shaft portion, comprising: an elastic seal portion; and a fixing portion facing a lip portion opposed to the elastic seal portion. An inner ring and a tapered sleeve are provided on both sides of the elastic seal portion, and an intermediate portion or a joint end portion of the lip portion provided on both sides of the fixed frame so as to be joined to the fixed frame is gradually thinned. A rotary sealing mechanism for a roll neck portion, wherein an oil sump groove is formed at the joining front end portion. 2. A lip joint surface of an elastic seal formed on both sides of a fixed frame is formed as an oblique surface inclined at an obtuse angle with respect to an intermediate axis of the fixed frame. 2. The lip portion tip side joining surface is parallel to the rib center axis, the side center axis having an acute angle inclined inward with respect to the fixed frame middle axis. Rotary sealing mechanism for roll neck. 3. A lip-joining surface of an elastic seal portion formed on both sides of the fixed frame is a flat surface perpendicular to an intermediate axis of the fixed frame, and a base end side of the lip portion on both sides of the elastic seal portion. 2. The roll according to claim 1, wherein a central axis is parallel to the fixed frame intermediate axis, and the joining surfaces on the tip side of the lip portions are obtuse angles inclined outward with respect to the rib central axis. Rotary seal mechanism for neck.