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US 9,828,940 B2Granted
Stirling cycle machine
AssigneeNew Power Concepts LLC
InventorsChristopher Charles Langenfeld, Prashant Bhat
Life of this patent
Estimating the term…
Abstract
A rod seal assembly. The rod seal assembly includes a housing between two spaces configured to receive a reciprocating rod, the reciprocating rod disposed within a first space and a second space, a floating bushing configured to move axially and radially within the housing and disposed coaxially around the reciprocating rod, a rod seal configured to seal the outside diameter of the reciprocating rod relative to an inside surface of the floating bushing, and at least one stationary bushing fixed within the housing that may form a seal with the floating bushing to the axial flow of fluid in the presence of a pressure difference between the two spaces.
Claims19
A rod seal assembly comprising:
- a housing between a first space and a second space, the housing including a passage connecting the first space and the second space, the passage defining an axis;
- a reciprocating rod disposed in the passage, the reciprocating rod extending into the first space and the second space;
- a floating bushing able to move axially and radially relative to the passage axis within the housing, the floating bushing disposed coaxially around the reciprocating rod;
- a rod seal sealing the outside diameter of the reciprocating rod relative to an inside surface of the floating bushing;
- and
- a first stationary bushing fixed within the housing;
- and
- a second stationary bushing fixed within the housing, the second stationary bushing axially aligned to the first stationary bushing and defining an annular space between the first and second stationary bushings, wherein the floating bushing extends into the annular space and forms a seal with one of the first and second stationary bushings to an axial flow of fluid in the presence of a pressure difference between the first space and the second space.
5 more elements
A rod seal assembly comprising:
- a housing between a first space and a second space, the first space and second space having a pressure difference, the housing including a passage connecting the first space and the second space, the passage defining an axis;
- a reciprocating rod disposed in the passage, the rod extending into the first space and the second space;
- a floating clearance bushing configured to move axially and radially relative to the passage within the housing and disposed coaxially around the reciprocating rod and forms a clearance seal with the reciprocating rod;
- a first stationary annular element fixed within the housing;
- a second stationary annular element fixed in housing;
- and
- the floating clearance bushing configured to form a face seal with only one of the first and second stationary annular elements.
4 more elements
A rod seal assembly comprising:
- a housing between a first space and a second space, the first space and second space having a pressure difference between them, the housing including a passage connecting the first space and the second space, the passage defining an axis;
- a reciprocating rod disposed in the passage, the reciprocating rod extending into the first space and the second space;
- a floating bushing able to move axially and radially relative to the passage axis within the housing, the floating bushing-disposed coaxially around the reciprocating rod;
- a rod seal sealing the outside diameter of the reciprocating rod relative to an inside surface of the floating bushing;
- and
- a first stationary bushing fixed within the housing, the first stationary bushing configured to form an axial seal with the floating bushing at least part of the time the pressure difference is in a first direction;
- and
- a second stationary bushing fixed within the housing, the second stationary bushing configured to form an axial seal with the floating bushing at least part of the time the pressure difference is in a second direction.
5 more elements
A rod seal assembly comprising:
- a housing between a first space and a second space, the first space and second space having a pressure difference between them, the housing including a passage connecting the first space and the second space, the passage defining an axis;
- a reciprocating rod disposed in the passage, the reciprocating rod extending into the first space and the second space;
- a floating bushing able to move axially and radially relative to the passage axis within the housing, the floating bushing disposed coaxially around the reciprocating rod;
- a rod seal sealing the outside diameter of the reciprocating rod relative to an inside surface of the floating bushing;
- a first stationary bushing fixed within the housing, the first stationary bushing forming a seal with the floating bushing to an axial flow of fluid in the presence at least part of the time the pressure difference between the first space and the second space is in a first direction;
- a second stationary bushing fixed within the housing, the second stationary bushing configured to form an axial seal with the floating bushing at least part of the time the pressure difference is in a second direction;
- a scraper ring disposed coaxially around the reciprocating rod and disposed within the housing between the floating bushing and the first space;
- and
- a magnetic particle trap disposed between the scraper ring and floating bushing.
6 more elements
A rod seal assembly comprising:
- a housing between a first space and a second space, the first space and second space having a pressure difference, the housing including a passage connecting the first space and the second space, the passage defining an axis;
- a reciprocating rod disposed in the passage, the reciprocating rod extending into the first space and the second space;
- a floating clearance bushing configured to move axially and radially relative to the passage within the housing and disposed coaxially around the reciprocating rod and forms a clearance seal with the reciprocating rod;
- a first stationary annular element fixed within the housing, the first stationary annular element configured to form a face seal with the floating clearance bushing at least part of the time the pressure difference is in a first direction;
- a second stationary bushing fixed within the housing, the second stationary bushing configured to form an axial seal with the floating bushing at least part of the time the pressure difference is in a second direction;
- a scraper ring disposed coaxially around the reciprocating rod and disposed within the housing between the floating bushing and the first space;
- and
- a magnetic particle trap disposed between the scraper ring and floating clearance bushing.
5 more elements
Dependencies are inferred from the claim text.