Multi-layer and multi-ringed seals for preventing permeation and leak-by of fluid

A system comprising:

• a first body;
• a second body comprising a channel recessed within the second body;
• a seal disposed in the channel and to prevent fluid through a first interface between the seal and the first body, the seal comprising
• a first band member defining a first band seal surface on first side of the first band member, the first band member configured to provide a first fluid seal with the first body when compressed to the first body,
• a second band member defining a second band seal surface on a first side of the second band member, the second band member configured to provide a second fluid seal with the first body when compressed to the first body,
• wherein the first band member and the second band member at least partially define a cavity between the first band member and the second band member;
• and
• a bridge member extending through the cavity and connecting the first band member to the second band member,
• wherein
• the seal prevents fluid through a second interface between the first body and the second body,
• the first band member defines a third band seal surface on an opposite side as the first side and configured to provide a third fluid seal with the second body when compressed between the first body and the second body,
• the second band member defines a fourth band seal surface on an opposing side as the second band seal surface and configured to provide a fourth fluid seal with the second body when compressed between the first body and the second body,
• the cavity is between the first body and the second body,
• the first band member and the second band member have open circularly-shaped cross-sections,
• the first band member includes a first inner edge,
• the second band member includes a second inner edge, and
• when the first band member and the second band member are compressed between the first body and the second body, the first inner edge and the second inner edge move closer to the bridge member;
• a pump;
• and
• a controller configured to control the pump to evacuate the cavity, wherein the cavity is located in the channel between the first band member and the second band member.

A system comprising:

• a first body;
• a second body comprising a first channel and a second channel recessed within the second body;
• a first seal disposed in the first channel and to prevent fluid through an interface between the first seal and the first body, the first seal comprising
• a first band member defining a first band seal surface on first side of the first band member, the first band member configured to provide a fluid seal with the first body when compressed to the first body,
• a second band member defining a second band seal surface on a first side of the second band member, the second band member configured to provide another fluid seal with the first body when compressed to the first body,
• wherein the first band member and the second band member at least partially define a cavity between the first band member and the second band member, and a bridge member extending through the cavity and connecting the first band member to the second band member;
• wherein the first seal comprises a core formed of aluminum, and
• one or more layers disposed on an outer surface of the core and configured to define the first band seal surface and the second band seal surface when compressed between the first body and the second body, respectively, and
• at least one of the one or more layers is formed of a perfluoroelastomer;
• a second seal disposed in the second channel;
• a pump;
• and
• a controller configured to control operation of the pump to evacuate fluid from the interface via a plenum and at a location between the first body and the second body and between the first seal and the second seal.

A system comprising:

• a first body;
• a second body comprising a first channel and a second channel recessed within the second body;
• a first seal disposed in the first channel and to prevent fluid through an interface between the first seal and the first body, the first seal comprising a first band member defining a first band seal surface on first side of the first band member, the first band member configured to provide a first fluid seal with the first body when compressed to the first body,
• a second band member defining a second band seal surface on a first side of the second band member, the second band member configured to provide a second fluid seal with the first body when compressed to the first body,
• wherein the first band member and the second band member at least partially define a cavity between the first band member and the second band member, and
• a bridge member extending through the cavity and connecting the first band member to the second band member,
• wherein the first seal comprises a core formed of a polymer, and
• one or more layers disposed on the core and configured to define the first band seal surface and the second band seal surface when compressed between the first body and the second body, respectively;
• and
• at least one of the one or more layers is formed of at least one of aluminum or a perfluoroelastomer;
• a second seal disposed in the second channel;
• a pump;
• and a controller configured to control operation of the pump to evacuate fluid from a gap in the interface, wherein the gap is located between the first body and the second body and between the first seal and the second seal.