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US 2021/0156472 A1Published application
Bellows seal assembly
AssigneeEaton Intelligent Power Limited
InventorsSteven Bender, Jeffrey Lavin
Life of this patent
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Abstract
The present disclosure provides an improved bellows type seal. In the present disclosure, the bellows of the seal dampen resulting in the seal having a longer useful life and can withstand higher loads. The seal includes a damper assembly that includes a spring and a band that are engaged on the exterior of a bellows for dampening vibrations.
Claims20
A bellows seal assembly comprising:
- a cylindrical main housing including a first end and a second end;
- a cylindrical bellows including a first end and a second end, the first end of the cylindrical bellows connected to the inside of the cylindrical main housing at the first end of the cylindrical main housing;
- a ring seal coaxially arranged with the bellows and connected to the second end of the bellows;
- and
- a damper assembly, the damper assembly includes:
- a band that wraps around an exterior portion of the cylindrical bellows;
- and
- a circumferential spring that biases the band radially against the exterior portion of the bellows.
5 more elements
A face type bellows seal assembly comprising:
- a metal cylindrical main housing including a first end and a second end;
- a metal cylindrical welded bellows including a first end and a second end, the first end of the cylindrical welded bellows is connected to an inwardly extending radial flange of the main cylindrical housing at the first end of the cylindrical main housing;
- a metal annular ring seal housing including an L-shaped cross-section with a radial extending ring portion and an axial extending ring portion, the axial extending ring portion being connected to the second end of the cylindrical welded bellows;
- a carbon graphite insert pressed into the axial extending ring portion of the annular ring seal housing;
- and
- a damper assembly positioned around a portion of the cylindrical welded bellows, wherein the circumferential damper assembly includes:
- a band, the band including at least two wide portions separated by narrow portions, the narrow portions having a width of between 3 millimeters to 10 millimeters and the wide portions having a width of between 10 millimeters to 35 millimeters;
- a first metal circumferential coil spring that biases the band radially against an exterior of the cylindrical welded bellows, the first circumferential spring engaged with the axial spring retainers on the exterior of the band;
- and
- a second circumferential metal coil spring that engages with the axial spring retainers on the exterior of the band, the first and the second circumferential spring being offset axially and positioned parallel to each other.
7 more elements
Dependencies are inferred from the claim text.