Seal assembly for sealing a space between a housing and a component against entry of a liquid medium

Patent metadata

Field	Value
Publication number	US-10458549-B2
Application number	US-201615159999-A
Country	US
Kind code	B2
Filing date	May 20, 2016
Priority date	May 22, 2015
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A seal assembly for sealing a space between a housing and a component against a liquid medium includes a seal element fixedly connectable to the housing, the seal element including a seal lip that is movable at least in a radial direction, the seal lip being disposed at an angle with respect to the radial direction and a support element in abutment with the seal lip. The support element and the seal element are configured such that a pressure exerted on the seal lip by the liquid medium is transmittable in the radial direction to the support element, and the seal assembly also includes a further seal assembly on a side of the support element axially opposite the seal element, the further seal assembly including a first seal having a first seal body and a second seal having a second seal body.

First claim

What is claimed is:

1. A seal assembly for sealing a space between a housing and a component against a liquid medium, comprising:
a first seal element fixedly connectable to the housing, the first seal element including a first body structure located on the housing, a first seal lip is disposed on the first body structure, the first seal lip is movable at least in a radial direction, the first seal lip being disposed at a first angle with respect to the radial direction such that one elongated side of the first seal lip faces the component;
a second seal element fixedly connectable to the housing, the second seal element including a second body structure located on the housing, a second seal lip is disposed on the second body structure, the second seal lip is movable at least in the radial direction, the second seal lip being disposed at a second angle with respect to the radial direction;
a support element is disposed between and in contact with the first support body and the second support body, the support element overlying a portion of the one elongated side of the first seal lip, the support element having an axially extending section that overlies a portion of the second support structure without contacting the second seal lip, wherein the support element and the first seal element and the second seal element are configured such that a pressure exerted on the first seal lip by the liquid medium is transmittable in the radial direction to the first support element and such that a second pressure exerted on the second seal lip by the liquid medium is transmittable in the radial direction to the second support element, the first and second seal lips being free of any spring pressing the first and second seal lips against the component;
the component or the support element and the housing defining a bore positioned axially over the support element or the component, respectively, the bore being axially spaced from each of the first and second seal lips;
a third seal element fixedly connectable to the housing, the third seal element including a third body structure located on the housing, a third seal lip is disposed on the third body structure, the third seal lip is movable at least in the radial direction, the third seal lip being disposed at a third angle with respect to the radial direction, the third body structure being adjacent to and abutting the second body structure;
the second seal lip and the third seal lip face in axially opposite direction from each other; and
an axial extension of the third body structure or the second body structure is different than an axial extension of the first body structure.

2. The seal assembly according to claim 1 , wherein the support element has a greater rigidity than a rigidity of the first and second seal elements.

3. The seal assembly according to claim 1 , wherein the support element is formed one-piece with the housing.

4. The seal assembly according to claim 1 , wherein the first and second seal lips each project radially beyond the support element.

5. The seal assembly according to claim 1 , wherein the seal assembly delimits a volume accessible via, the bore which is configured to discharge a medium located in the volume.

6. The seal assembly according to claim 5 , wherein the bore extends through the support element and the housing and positioned axially over the component.

7. The seal assembly according to claim 1 , wherein the housing includes a radially extending support surface including an undercut for producing a friction-fit connection to the first body structure of the first seal element.

8. A turbine hub, comprising:
a seal assembly according to claim 1 ;
wherein the component is a shaft configured to pivotably support a turbine blade with respect to the turbine hub; and
wherein the seal assembly seals against the shaft using the first and second seal lips.

9. The seal assembly accordingly to claim 1 , wherein the support element is formed of metal.

Assignees

• Baumann Michael
• Kogler Christian
• Skf Ab

Inventors

• Baumann Michael
• Kogler Christian

Classifications

• F16J15/3204 Primary

  with at least one lip · CPC title

• F16J15/3232 Primary

  having two or more lips · CPC title

• F03B11/006

  Sealing arrangements (F03B3/14, F03B3/183, F03B13/083 takes precedence; sealings in general F16J) · CPC title

• F16J15/322

  supported in a direction perpendicular to the surfaces · CPC title

• F16J15/3248

  provided with casings or supports · CPC title