Device for transmitting a torque from a drive device onto a roller in a roll stand

Patent metadata

Field	Value
Publication number	US-10751775-B2
Application number	US-201615735009-A
Country	US
Kind code	B2
Filing date	Jun 7, 2016
Priority date	Jun 10, 2015
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A device for transmitting a torque from a drive device (200) onto a roller in a roll stand. In order to make the device independent from the continuous external supply of lubricant, the lubricant spaces in the two pivot bearings are connected to one another in a fluidically conductive manner by way of a feed channel and a return channel for the lubricant in the region of the spindle such that a closed circuit for the lubricant is formed, and that the least one pump device is integrated in the circuit in order to maintain the circulation of the lubricant in the circuit.

First claim

The invention claimed is:

1. A device for transmitting a torque from a drive device to a roller in a roll stand for rolling a rolling stock, comprising:
a spindle;
a drive-side pivot bearing for rotatably coupling the spindle to a drive shaft of the drive device;
a roller-side pivot bearing for rotatably coupling the spindle to a pin of the roller, whereby a lubricant chamber is formed in the roller-side pivot bearing; and
at least one pump device is built in a circuit for liquid lubricant for supplying the liquid lubricant in the circuit;
wherein in an area of the spindle is built a feed channel and a return channel for the lubricant, which are connected in a fluidically conductive manner to the lubricant chamber in the roller-side pivot bearing;
wherein a lubricant chamber is built in the drive-side pivot bearing:,
wherein the roller-side pivot bearing is provided with a roller-side sleeve, which is connected in a fixed manner with the pin to the roller-side pivot bearing, in which the roller-side end of the spindle is rotatably coupled to and engaged via its outer toothing by an inner toothing of the roller-side sleeve;
wherein the lubricant chamber is sealed and delimited in the roller-side pivot bearing toward the pin of the roller by a separating wall radially extending through the interior of the roller-side sleeve, in the radial direction through the roller-side sleeve and sealed and delimited toward the drive side by a ring seal which is set on the spindle; and
wherein the lubricant chambers in the roller-side and in the drive-side pivot bearing are mutually connected to each other, wherein the circuit for the lubricant is formed as a closed circuit.

2. The device according to claim 1 , wherein the drive-side pivot bearing is provided with a drive-side sleeve which is non-rotatably connected to the drive shaft of the drive device, in which a drive-side end of the spindle is rotatably coupled and engaged with the drive-side end of the spindle via its outer toothing to an inner toothing of the drive side sleeve.

3. The device according to claim 2 , wherein the lubricant chamber is sealed in the drive-side pivot bearing toward the drive device with a separating wall radially extending in the interior of the drive-side sleeve, in the radial direction by the drive-side sleeve and sealed toward the roller-side by a ring seal which is set on the spindle.

4. The device according to claim 3 , wherein:
the drive-side and the roller-side pivot bearings are arranged shifted relative to each other in such a way, that the output shaft of the drive device and the pin of the roller are not mutually aligned;
the at least one pumping device is formed by a channel section of the circuit, which is connected in a fluidically conductive manner to the lubricant chamber connected to the return channel and in the roller-side pivot bearing to the feed channel in the area of the spindle; and
the pumping device is further provided with a radially offset lubricant piston mounted on the roller-side front face of the spindle having a fixed side and a loose side, wherein the lubricant piston is fixed with its fixed side on the separating wall, in the roller-side sleeve in the axial direction, and with its loose side it is displaceably mounted in a partial channel of the channel section on the roller-side front face of the spindle, wherein the partial channel and the lubricant piston form a first piston-cylinder unit.

5. The device according to claim 4 , wherein:
the channel section is provided with a plurality of fluidically conductive partial channels, which are mutually communicating with each other and arranged in a stem shape, among which a first number opens into the lubricant chamber, in the roller-side pivot bearing, among which a second number opens into the feed channel in the area of the spindle, and among which another partial channel forms the first piston-cylinder unit; and
the first number of the partial channels can be closed toward the lubricant chamber, in the roller-side pivot bearing, and the second number of the partial channels can be closed toward the feed channel in the area of the spindle with return channels.

6. The device according to claim 4 , wherein a plurality of pump devices are arranged distributed on the roller-side front face of the spindle over the circumference, wherein the channel sections of the individual pump devices are respectively connected in the circuit in parallel in a fluidically conductive manner.

7. The device according to claim 1 , wherein a compensating container is provided as a reservoir for the liquid lubricant, which is connected in a fluidically conductive manner for the lubricant to the circuit.

8. The device according to claim 7 , wherein:
the compensating container is designed in the form of a second piston-cylinder unit, wherein a ring-shaped compensating cylinder is arranged on the outer side of the spindle and coaxially to its longitudinal axis; and
in the ring-shaped compensating cylinder is displaceably guided a ring-shaped floating piston which is axially shiftable, wherein the floating piston is exposed with its front face to the pressure of ambient air and with its other front face delimits the reservoir for the lubricant.

9. The device according to claim 1 , wherein the feed channel for the lubricant is formed as an axial bore in the area of neutral fibers of the spindle and the return channel is radially offset in the outward direction formed as a coaxial channel on the periphery of the spindle, or vice versa.

10. The device according to claim 9 , wherein the thickness of the outer wall of the channel, which is arranged offset in the outward direction, does not exceed a predetermined threshold value, wherein the thickness threshold value is selected in such a way that a desired heat amount of the lubricant flowing in the channel can be discharged by the outer wall into the environment.

11. The device according to claim 1 , wherein a ball joint connection is provided for connecting the roller-side front face of the spindle to the separating wall in the roller-side sleeve.

Assignees

• Sms Group Gmbh

Inventors

• Merz Jürgen
• Scheffe Kurt

Classifications

• B21B35/14 Primary

  Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills (couplings or shafts in general F16) · CPC title

• B21B35/143 Primary

  having slidably-interengaging teeth, e.g. gear-type couplings (universal joints with the coupling parts having slidably-interengaging teeth, in general, F16D3/18) · CPC title

• F16D3/185

  radial teeth connecting concentric inner and outer coupling parts · CPC title

• F16D2300/06

  Lubrication details not provided for in group F16D13/74 · CPC title

• B21B2275/12

  Roll torque · CPC title