Rolling assembly

Patent metadata

Field	Value
Publication number	US-12502813-B2
Application number	US-202418635057-A
Country	US
Kind code	B2
Filing date	Apr 15, 2024
Priority date	Apr 20, 2023
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A rolling assembly, including at least one roll pair with two cooperating rolls and a safety device. The safety device includes a hydraulic accumulator and a measuring device. The hydraulic accumulator includes an accumulator with a first and second accumulator chamber. A hydraulic fluid is disposed within the first accumulator chamber. A compressible gas is disposed within the second accumulator chamber. The hydraulic accumulator includes a moveably arranged separating member separating the first accumulator chamber from the second accumulator chamber. The roll pair has a working position and a safety position. A radial distance between the rolls is larger in the safety position than in the working position. The hydraulic accumulator is configured to move the roll pair from the working position to the safety position. The measuring device is configured to continuously detect a position of the separating member within the hydraulic accumulator.

First claim

The invention claimed is:

1 . A method for monitoring functionality of a safety device of a rolling assembly, the rolling assembly comprising:
at least one roll pair with two cooperating rolls; and the safety device, wherein the safety device includes a hydraulic accumulator and a measuring device, wherein the hydraulic accumulator includes an accumulator with a first accumulator chamber and a second accumulator chamber, wherein a hydraulic fluid is disposed within the first accumulator chamber, wherein a compressible gas is disposed within the second accumulator chamber, wherein the hydraulic accumulator includes a moveably arranged separating member, which separates the first accumulator chamber from the second accumulator chamber in a sealed manner, wherein the roll pair has a working position and a safety position, wherein a radial distance between the rolls is larger in the safety position than in the working position, wherein the hydraulic accumulator is configured to have an effect on the roll pair to move the roll pair from the working position to the safety position, and wherein the measuring device is configured to continuously detect a position of the separating member within the hydraulic accumulator, wherein the method comprises: moving the separating member by changing a relative pressure between the first and second accumulator chambers; measuring a position of the separating member within the hydraulic accumulator and comparing the measured position of the separating member to a predetermined reference position of the separating member; and determining the functionality of the safety device from a deviation of the measured position from the predetermined reference position.

2 . The method according to claim 1 , wherein the measuring device is a mechanical position sensing system.

3 . The method according to claim 1 , wherein the hydraulic accumulator is a piston accumulator, and wherein the separating member is formed as a piston.

4 . The method according to claim 1 , wherein the hydraulic accumulator is a bladder accumulator, and wherein the separating member is formed as a bladder.

5 . The method according to claim 1 , wherein the hydraulic accumulator is a diaphragm accumulator, and wherein the separating member is formed as a diaphragm.

6 . The method according to claim 1 , wherein the first accumulator chamber has an outlet valve associated therewith, and wherein the outlet valve is switchable between open and closed positions.

7 . The method according to claim 1 , wherein the rolling assembly is configured to process elastomeric materials.

8 . The method according to claim 1 , wherein the reference position is determined during normal operation of the rolling assembly.

9 . The method according to claim 1 , wherein the measured position is continuously compared to the reference position.

Assignees

• Freudenberg Carl Kg

Inventors

• Semrau Marek

Classifications

• F15B2201/515

  Position detection for separating means · CPC title

• F15B2201/50

  Monitoring, detection and testing means for accumulators · CPC title

• F15B2201/31

  having rigid separating means, e.g. pistons · CPC title

• F15B2201/205

  using gas · CPC title

• F15B1/24

  with rigid separating means, e.g. pistons · CPC title