US 11,754,184 B2
Cryocooler and sealing component
Shuntaro Adachi, Kanagawa (JP)
Assigned to SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Feb. 10, 2021, as Appl. No. 17/172,538.
Claims priority of application No. 2020-022796 (JP), filed on Feb. 13, 2020.
Prior Publication US 2021/0254718 A1, Aug. 19, 2021
Int. Cl. F16J 15/3268 (2016.01); F25B 9/14 (2006.01); F16J 15/00 (2006.01)
CPC F16J 15/3268 (2013.01) [F16J 15/002 (2013.01); F25B 9/145 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A cryocooler comprising:
a displacer;
a connecting rod connected to the displacer; and
a sealing component that supports the connecting rod to allow axial reciprocation thereof, wherein the sealing component includes
a bush through which the connecting rod is inserted and defining a radial clearance functioning as a non-contact seal between the connecting rod and the bush,
a first contact seal held by the bush on a first side thereof away from the displacer with respect to the radial clearance, the first contract seal sealing the radial clearance, and
a second contact seal held by the bush on a second side thereof toward the displacer with respect to the radial clearance, the second contact seal sealing the radial clearance, and
wherein the bush is furnished with at least one of:
a first annular recess formed on a first axial outermost end surface of the bush and accommodating the first contact seal, and
a second annular recess formed on a second axial outermost end surface of the bush and accommodating the second contact seal.