US 12,404,879 B2
Separator and hydraulic accumulator having such a separator
Peter Kloft, Ransbach-Baumbach (DE); and Torsten Kusserow, Thörnich (DE)
Assigned to HYDAC TECHNOLOGY GMBH, Sulzbach/Saar (DE)
Appl. No. 18/566,793
Filed by Hydac Technology GmbH, Sulzbach / Saar (DE)
PCT Filed May 24, 2022, PCT No. PCT/EP2022/063977
§ 371(c)(1), (2) Date Dec. 4, 2023,
PCT Pub. No. WO2022/258359, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 10 2021 002 971.2 (DE), filed on Jun. 10, 2021.
Prior Publication US 2024/0271639 A1, Aug. 15, 2024
Int. Cl. F15B 1/10 (2006.01); B33Y 80/00 (2015.01); F16J 3/04 (2006.01)
CPC F15B 1/103 (2013.01) [F16J 3/047 (2013.01); B33Y 80/00 (2014.12); F15B 2201/3153 (2013.01); F15B 2201/61 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A hydraulic accumulator, having an accumulator housing and a bellows-shaped separator disposed therein, which separates two media chambers from each other inside the accumulator housing, wherein the separator is produced by a 3D printing process, consisting of one single diaphragm; wherein the diaphragm, when viewed in cross section, is deflected in an arcuate shape to form a multitude of bellows pleats at deflection points, which delimit the bellows pleats on an outside and an inside; wherein to obtain an isotensoid or essentially isotensoid stress profile in the diaphragm, notional extensions of the diaphragm surfaces adjacent to each deflection point form an acute angle (a) with each other at least in an initial state; wherein
the individual diaphragm surface between two adjacent deflection points, which are located on opposite sides of the diaphragm, has an undulating course, wherein the diaphragm material of the diaphragm is reduced in wall thickness between two adjacent deflection points located on any common side of the diaphragm.
 
11. A separator for a bellows accumulator, which separator movably separates a gas media chamber and a fluid media chamber from each other, consisting of one single diaphragm; wherein the diaphragm, when viewed in cross section, is deflected in an arcuate shape to form a multitude of bellows pleats at deflection points, which delimit the bellows pleats on an outside and an inside; wherein to obtain an isotensoid or essentially isotensoid stress profile in the diaphragm, notional extensions of the diaphragm surfaces adjacent to each deflection point form an acute angle with each other at least in an initial state; wherein
the individual diaphragm surface between two adjacent deflection points, which are located on opposite sides of the diaphragm, has an undulating course, wherein the diaphragm material of the diaphragm is reduced in wall thickness between two adjacent deflection points located on any common side of the diaphragm.
 
12. A separator for a bellows accumulator with an accumulator housing for receiving the separator therein, the separator consisting of one single diaphragm; wherein
the diaphragm, when viewed in cross section, is deflected in an arcuate shape to form a multitude of bellows pleats at deflection points, which delimit the bellows pleats on an outside and an inside; wherein
to obtain an isotensoid or essentially isotensoid stress profile in the diaphragm, notional extensions of the diaphragm surfaces adjacent to each deflection point form an acute angle (α) with each other at least in an initial state; wherein
the acute angle (α) is ≤30°; and wherein
the diaphragm material of the diaphragm is reduced in wall thickness between two adjacent deflection points located on any common side of the diaphragm, and the individual diaphragm surface between two adjacent deflection points, which are located on opposite sides of the diaphragm, has an undulating course.
 
15. A separator, which is produced by a 3D printing process, consisting of one single diaphragm; wherein
the diaphragm, when viewed in cross section, is deflected in an arcuate shape to form a multitude of bellows pleats at deflection points, which delimit the bellows pleats on an outside and an inside; wherein
to obtain an isotensoid or essentially isotensoid stress profile in the diaphragm, notional extensions of the diaphragm surfaces adjacent to each deflection point form an acute angle (α) with each other at least in an initial state; wherein
the diaphragm material of the diaphragm is reduced in wall thickness between two adjacent deflection points located on any common side of the diaphragm; and wherein the individual diaphragm surface between two adjacent deflection points, which are located on opposite sides of the diaphragm, has an undulating course.