Volume flow regulating valve

Patent metadata

Field	Value
Publication number	US-10974296-B2
Application number	US-201615778463-A
Country	US
Kind code	B2
Filing date	Oct 28, 2016
Priority date	Nov 23, 2015
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A volume flow regulating valve for controlling the volume flow of a fluid medium in two outflow ducts. The volume flow regulating valve is composed of a cylinder with a dual piston mounted axially displaceably in the cylinder, with a central pressure chamber being formed in the region of the barbell-shaped central piece of the dual piston. Aside from an inlet for the fluid medium, it is also the case that the two outlet ducts are provided at the central pressure chamber. The outlet ducts are arranged on the cylinder with such an axial spacing that—when the dual piston is situated in a central position in relation to the two outlet ducts—the first outlet duct—preferably partially covered by the first piston—and the second outlet duct—preferably partially covered by the second piston—each open up an equal opening cross-sectional area.

First claim

The invention claimed is:

1. A volume flow regulating valve, comprising:
a cylinder having a cavity;
a dumbbell-shaped double piston guided in the cavity of the cylinder, the double piston having a first piston and a second piston, the pistons being fixedly connected together by a narrowed center member, wherein a central pressure chamber is formed in the cavity in a region of the narrowed center member, each piston having an end face remote from the narrow center member;
a first peripheral pressure chamber and a second peripheral pressure chamber in the cylinder, the first peripheral chamber being bounded by the end face of the first piston and the second peripheral chamber being bounded by the end face of the second piston; and
a feed channel and a first drain channel in the cylinder respectively for feeding a fluid medium to and draining the fluid medium from the central chamber;
a second drain channel in the cylinder for draining the fluid medium from the central pressure chamber, wherein
the first drain channel and the second drain channel are arranged at the cylinder with an axial spacing so that when the double piston is disposed in a center setting with respect to the two drain channels the first drain channel and the second drain channel respectively free an equal opening cross-section area;
a first pressure channel provided to supply a static pressure in the first drain channel to the second peripheral pressure chamber, wherein the first pressure channel has an end at an opening in a wall of the first drain channel so as to detect the static pressure in the first drain channel;
a second pressure channel provided to supply a static pressure in the second drain channel to the first peripheral pressure chamber, wherein the second pressure channel has an end at an opening in a wall of the second drain channel so as to detect the static pressure in the second drain channel;
a first pitot tube arranged in the first drain channel so that the fluid medium flows into the first pitot tube and the first pitot tube detects total pressure in the first drain channel;
a second pitot tube arranged in the second drain channel so that the fluid medium flows into the second pitot tube and the second pitot tube detects total pressure in the second drain channel;
a first plunger mounted in the first peripheral pressure chamber to be axially displaceable for action on the end face of the first piston, wherein the first plunger is loaded by the total pressure in the first drain channel; and
a second plunger mounted in the second peripheral pressure chamber to be axially displaceable for action on the end face of the second piston, wherein the second plunger is loaded by the total pressure in the second drain channel.

2. The volume flow regulating valve according to claim 1 , wherein in the center setting the first piston partially covers the first drain channel and the second piston partially covers the second drain channel.

3. The volume flow regulating valve according to claim 1 , wherein the volume flow regulating valve is configured for pressures up to 2,000 bar.

4. The volume flow regulating valve according to claim 1 , further comprising a respective spring arranged in each of the first and second peripheral pressure chambers so as to hold the double piston in the center setting and so that the double piston is axially displaceable.

5. A chock for rotatable mounting of a roll pin of a roll in a roll stand for a rolling material to be rolled, comprising:
a cylindrical receiving chamber for receiving the roll pin;
a first feed channel and a second feed channel for feed of coolant and/or lubricant to the receiving chamber; and
an element for regulating volume flow of the coolant and/or lubricant in the first and second feed channels; wherein the element is a volume flow regulating valve according to claim 1 ; and
the first drain channel of the volume flow regulating valve is connected with the first feed channel and the second drain channel is connected with the second feed channel.

6. The chock according to claim 5 , wherein at least one of the first and second feed channels communicates with a hydrostatic pocket formed at an inner wall of the receiving chamber for the roll pin.

7. The chock according to claim 6 , further comprising a bearing bush that spans the receiving space as a wear component; wherein
the hydrostatic pocket is formed at an inner side of the bearing bush.

8. The chock according to claim 5 , further comprising a pump for feeding the coolant and/or lubricant via the feed channel for feeding the fluid medium to the central pressure chamber of the volume flow regulating valve.

9. The chock according to claim 8 , wherein the pump feeds the coolant and/or lubricant at pressures up to 2,000 bar.

Assignees

• Sms Group Gmbh

Inventors

• Knie Daniel
• Alken Johannes

Classifications

• B21B31/07 Primary

  Adaptation of roll {neck} bearings (bearings in general F16C) · CPC title

• B21B31/074 Primary

  Oil film bearings, e.g. "Morgoil" bearings · CPC title

• F15B13/02

  Fluid distribution or supply devices characterised by their adaptation to the control of servomotors · CPC title