Roll assembly for rolls in a rolling mill

Patent metadata

Field	Value
Publication number	US-10449582-B2
Application number	US-201415038799-A
Country	US
Kind code	B2
Filing date	Nov 11, 2014
Priority date	Nov 26, 2013
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

To increase the load-carrying capacity or rolling capacity of a roll assembly in a rolling mill, throttle elements are used, which shut off the lateral flow of the lubricating film in a partial region between the roll neck and the bearing surface of the roll neck bearing assembly, thereby bringing about an increase in pressure in the lubricating film. At least one throttle element is embodied as an annular segment, forming an angular shut-off region for the lubricant in the annular gap. The invention makes it possible for existing installations to be easily retrofitted, without the need for structural modifications. In the case of new installations, the same load-carrying capacity as before can be provided while the dimensions of the installation space are reduced. The load-carrying capacity of the bearing assembly can be flexibly adjusted based on the dimensions of the shut-off region for the flow of lubricant.

First claim

The invention claimed is:

1. A roll assembly ( 100 ) for rolls in a rolling mill, comprising:
a roll ( 10 ) having a roll barrel ( 25 ) and at least one roll neck ( 20 );
a chock ( 60 ) having a receiving opening for receiving the roll neck ( 20 ), wherein an inner diameter of the receiving opening is greater than an outer diameter of the roll neck ( 20 ) such that an annular gap ( 35 ) for receiving a lubricant ( 31 ) is formed between the chock ( 60 ) and the roll neck ( 20 );
a first throttle element ( 70 ), which is disposed in a rotationally fixed manner at a roll barrel-side end face of the receiving opening of the chock for sealing the annular gap ( 35 ); and
a second throttle element ( 71 ), which is disposed in a rotationally fixed manner at an end face of the receiving opening of the chock that is distant from the roll barrel, for sealing the annular gap ( 35 );
characterized in that
the first and second throttle elements ( 70 , 71 ) each form an angular shut-off region ( 52 , α) for the lubricant ( 31 ) in the annular gap ( 35 ) and each is positioned in such a way that the angular shut-off region ( 52 , α) extends starting from a bearing load point (A), the bearing load point being an angular position of a narrowest gap (hmin) between the roll neck ( 20 ) and the chock ( 60 ) in the case of a load between the chock and the roll neck, in a direction opposite a rotational direction of the roll ( 10 ), over an angle (α) of at least 25° to at most 270°.

2. The roll assembly ( 100 ) according to claim 1 ,
characterized in that,
in the case of the load between the chock and the roll neck, the bearing load point (A) is located in an angular region of φ=+/−25° in relation to a center axis (Y) of the roll ( 10 ), which extends perpendicular to a plane of the rolling stock.

3. The roll assembly ( 100 ) according to claim 1 ,
characterized in that
the throttle elements are arranged abutting against the roll neck ( 20 ) in a radial direction of the roll, forming a seal therebetween.

4. The roll assembly ( 100 ) according to claim 1 ,
characterized in that
the first or the second throttle element or both throttle elements ( 70 , 71 ) is/are configured as an annular segment.

5. The roll assembly according to claim 4 ,
characterized in that
a compression spring is disposed on an outer periphery of the annular segment, for the purpose of pressing the annular segment in a radial direction of the roll against the roll neck, forming a seal.

6. The roll assembly ( 100 ) according to claim 1 ,
characterized in that
the first or the second or both throttle elements is/are formed as a throttle ring having the angular shut-off region (α, 52 ) and an angular flow-through region (β, 74 ) for the lubricant ( 31 ) in the annular gap ( 35 ), wherein the angular flow-through region (β, 74 ) is formed by flow-through openings in the throttle ring, and wherein the angular flow-through region extends bordering the angular shut-off region over an angular range of 360° minus the angular shut-off region.

7. The roll assembly according to claim 6 ,
characterized in that
the throttle ring is formed as a snap ring having a gap, wherein the gap is formed in the angular flow-through region.

8. The roll assembly ( 100 ) according to claim 1 ,
characterized in that
a bearing bush ( 40 ) for receiving the roll neck ( 20 ) is disposed in a rotationally fixed manner in the chock ( 60 ).

9. The roll assembly ( 100 ) according to claim 1 ,
characterized in that
the throttle elements ( 70 , 71 ) is/are coupled to the chock ( 60 ) or to a bearing bush ( 40 ).

10. The roll assembly ( 100 ) according to claim 9 ,
characterized in that
an annular groove ( 16 ) is formed on at least one of the end faces of the bearing bush ( 40 ) or the chock ( 60 ), and
in that at least one of the throttle elements ( 70 , 71 ) has a flange ( 76 ) on a rear side that faces the chock, for engaging into the annular groove.

11. The roll assembly according to claim 1 ,
characterized in that
an oil collecting space ( 64 ) is formed between the chock ( 60 ) and the roll barrel ( 25 ), at an end ( 22 ) of the roll neck ( 20 ) that is distant from the roll barrel.

12. The roll assembly according to claim 1 ,
characterized in that
a neck bush ( 30 ) is disposed on the roll neck ( 20 ); and in that the neck bush is rotationally mounted with the roll neck in the receiving opening of the chock, or in a bearing bush if one is provided.

13. The roll assembly according to claim 1 ,
characterized in that
the annular gap ( 35 ) is embodied as having at least one peripheral annular channel ( 36 , 36 ′) in a region between the first and the second throttle ring ( 70 , 71 ).

Assignees

• Sms Group Gmbh

Inventors

• Alken Johannes
• Seidel Ralf

Classifications

• B21B31/078

  Sealing devices (sealings in general F16J15/00) · CPC title

• F16C13/022

  supporting a hollow roll mantle rotating with respect to a yoke or axle · CPC title

• F16C33/74

  of sliding-contact bearings · CPC title

• F16C33/103

  retained in or near the bearing · CPC title

• B21B2203/18

  Rolls or rollers · CPC title