US 12,286,965 B2
Radial piston compressor with transmission element and piston guide ring
Ulf Mueller, Chemnitz (DE); Uwe Dietel, Lichtentanne (DE); Sebastian Krause, Magdeburg (DE); and Robert Reichelt, Niederwiesa (DE)
Assigned to thyssenkrupp Dynamic Components GmbH, Ilsenburg (DE); and thyssenkrupp AG, Essen (DE)
Appl. No. 18/026,957
Filed by thyssenkrupp Dynamic Components GmbH, Ilsenburg (DE); and thyssenkrupp AG, Essen (DE)
PCT Filed Sep. 14, 2021, PCT No. PCT/EP2021/075257
§ 371(c)(1), (2) Date Mar. 17, 2023,
PCT Pub. No. WO2022/058321, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 10 2020 211 680.6 (DE), filed on Sep. 17, 2020.
Prior Publication US 2024/0011475 A1, Jan. 11, 2024
Int. Cl. F04B 27/04 (2006.01); F04B 9/04 (2006.01); F04B 27/053 (2006.01)
CPC F04B 27/0414 (2013.01) [F04B 9/04 (2013.01); F04B 27/053 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A piston-cylinder assembly for a radial piston compressor, comprising:
a piston;
a cylinder bore, in which the piston is arranged displaceably along a center line of the cylinder bore;
a drive shaft with an axis of rotation and with a cylindrical eccentric, a center point of which is spaced apart from the axis of rotation of the drive shaft, wherein, during rotational movement of the drive shaft, the piston is movable by the cylindrical eccentric in the cylinder bore in a manner directed outward in a radial direction away from the drive shaft as far as a top dead center; and
a transmission element, which transmits movement of the cylindrical eccentric to the piston for generating movement of the piston outward in the cylinder bore in a manner directed away from the drive shaft, wherein the transmission element has a first supporting surface with which the transmission element is supported on a cylinder surface of the cylindrical eccentric;
wherein the piston has a concavely shaped, first operative surface facing the transmission element, and the transmission element has a convexly shaped, second supporting surface facing the first operative surface, wherein the first operative surface and the second supporting surface form a form-fitting connection which is effective in a circumferential direction of the cylindrical eccentric, and wherein a cylindrical piston guide ring is provided, through which the piston is movable in the cylinder bore in a manner directed inward toward the drive shaft in the radial direction from the top dead center (TDC) as far as a bottom dead center (BDC), wherein the piston has a convexly shaped, second operative surface which faces an inner shell surface of the piston guide ring and which, together with the inner shell surface of the piston guide ring, forms a form-fitting connection which is effective in a direction of the center line of the cylinder bore;
wherein the second operative surface of the piston is a cylinder shell section with a second operative surface radius, wherein a radius of the second supporting surface and the second operative surface radius have the same center point, wherein the center point is on a cylindrical surface of the cylindrical eccentric and is the point at which the center line of the cylinder bore penetrates the cylindrical surface of the cylindrical eccentric, and wherein the sum of a radius of the cylindrical surface of the cylindrical eccentric and the second operative surface radius of the piston corresponds to a radius of the inner shell surface of the piston guide ring.