Bead gasket

Patent metadata

Field	Value
Publication number	US-12467443-B2
Application number	US-202016951488-A
Country	US
Kind code	B2
Filing date	Nov 18, 2020
Priority date	Dec 2, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A bead gasket for sealing off an axial joint between a first component and a second component, the bead gasket including a first bead loop surrounds a first inner region in an axial view and includes a bead end face for an axial contact with one of the components; a passage for fluid which is located in the first inner region, wherein the first bead loop is a smallest bead loop surrounding the passage; and a first rigidifying structure which extends from the first bead loop into the first inner region in the axial view in order to rigidify the first bead loop.

First claim

The invention claimed is:

1 . A rotary pump for applying a pressure liquid to an assembly, the pump comprising:
(a) a pump housing featuring: a circumferential wall, which surrounds a delivery chamber of the pump; and a first end-face wall and second end-face wall which axially delineate the delivery chamber on its two end-face sides; (b) an inlet for the liquid on a low-pressure side of the pump housing and an outlet through which liquid on a high-pressure side of the pump housing can be delivered out of the delivery chamber; (c) a delivery member comprising a rotor, which can be rotationally moved in the delivery chamber, for delivering the liquid from the low-pressure side to the high-pressure side and through an outlet of the pump; and (d) a metal bead gasket comprising (i) a first bead loop which surrounds a first inner region of the bead gasket, through which the liquid can axially flow, and follows a contour of the outlet in an axial contact on the end-face side with respect to the first bead loop, in order to seal it off, in an axial view onto the bead gasket, (ii) a second bead loop which surrounds a second inner region located next to the first inner region in the axial view and comprises a bead end face for an axial contact with the first end-face wall, and (iii) a passage for liquid which is located in the second inner region, (e) wherein the outlet emerges on an outer end-face side of the first end-face wall which faces away from the delivery chamber, and the bead gasket is held on the pump housing such that it axially faces the outer end-face side of the first end-face wall, to seal off the outlet.

2 . The pump according to claim 1 , wherein
the bead gasket comprises a third bead loop which surrounds a third inner region of the bead gasket, through which the liquid can flow, in the axial view, wherein the first inner region and the third inner region overlap in the axial view, and an outer bead end face of the first bead loop which surrounds the outlet axially faces the pump housing and faces axially away from an outer bead end face of the third bead loop.

3 . The pump according to claim 1 , wherein the pump is arranged on an accommodating device, the accommodating device comprises an end-face wall, which lies axially opposite the outlet and comprises a pressure port, and a third bead loop surrounds the pressure port in axial contact with the end-face wall of the accommodating device, such that the outlet is connected to the pressure port in a liquid seal.

4 . The pump according to claim 1 , wherein when the pump is assembled, the bead gasket exerts an axial spring force on the pump housing via the first bead loop either in an indirect line of force to a spring device or in a direct line of force.

5 . The pump according to claim 1 , wherein the pump is a gear pump and/or a lubricant pump and/or coolant pump or a vacuum pump for a motor vehicle or a gear pump for a device for generating energy, for example a wind turbine.

6 . The pump according to claim 1 , wherein the bead gasket is held on the pump housing such that it abuts the outer end-face side of the first end-face wall in axial contact, to seal off the outlet.

7 . The pump according to claim 1 , wherein the bead gasket comprises a passage for liquid which is located in the first inner region, and wherein the first bead loop is a smallest bead loop surrounding the passage.

8 . The pump according to claim 1 , wherein the bead gasket comprises a first rigidifying structure which extends from the first bead loop into the first inner region in the axial view in order to rigidify the first bead loop.

9 . The pump according to claim 8 , wherein the first rigidifying structure is disc-shaped or bowl-shaped.

10 . The pump according to claim 8 , wherein the first rigidifying structure comprises multiple passages, which are separated from each other and jointly surrounded by the assigned bead loop, next to each other in an axial plan view.

11 . The pump according to claim 8 , wherein the first rigidifying structure extends over at least the majority of the inner circumference of the corresponding bead loop over a breadth, being a radial breadth in the axial view, which corresponds at least to the radial breadth of the corresponding bead loop.

12 . The pump according claim 1 , further comprising a second rigidifying structure which extends from the second bead loop into the second inner region in order to rigidify the second bead loop.

13 . The pump according to claim 12 , wherein the second rigidifying structure is disc-shaped or bowl-shaped and/or wherein the second rigidifying structure comprises multiple passages, which are separated from each other and jointly surrounded by the assigned bead loop, next to each other in an axial plan view.

14 . The pump according to claim 1 , the bead gasket comprising a third bead loop which surrounds a third inner region comprising a passage for the liquid in the axial view and comprises a bead end face for an axial contact with an end-face wall of an accommodating device, wherein
the first bead loop and the third bead loop are arranged axially one above the other, the first inner region and the third inner region overlap in the axial view, and the bead end face of the first bead loop faces axially away from the bead end face of the third bead loop.

15 . The pump according to claim 14 , the bead gasket comprising a third rigidifying structure which extends from the third bead loop into the third inner region in order to rigidify the third bead loop.

16 . The pump according to claim 15 , wherein the third rigidifying structure is disc-shaped or bowl-shaped and/or wherein the third rigidifying structure comprises multiple passages, which are separated from each other and jointly surrounded by the assigned bead loop, next to each other in an axial plan view.

17 . The pump according to claim 14 , wherein the first bead loop and the third bead loop splay axially away from each other towards the respective first inner region or third inner region and a respective bead end face of the first bead loop or the third bead loop, such that an elongated axial spring displacement is obtained between these bead end faces.

18 . The pump according to claim 1 , the bead gasket comprising:
a first gasket layer which comprises the first bead loop and the first inner region; and a second gasket layer comprising a third bead loop which surrounds a third inner region in which a passage for the liquid is located, wherein the first gasket layer and the second gasket layer lie axially one above the other, the third bead loop comprises a bead end face for an axial contact with an end-face wall of an accommodating device, wherein said bead end face faces axially away from the bead end face of the first bead loop, and the first inner region and the third inner region overlap in the axial view.

19 . The pump according to claim 1 , the bead gasket comprising:
a first gasket layer which comprises the first bead loop and the first inner region; and a second gasket layer comprising a third bead loop which surrounds a third inner region in which a passage for the liquid is located, wherein the first gasket layer and the second gasket layer lie axially one above the other, the third bead loop comprises a bead end face for an axial contact with an end-face wall of an accommodating device, wherein said bead end face faces axially away from the bead end face of the first bead loop, and the first inner region and the thi

Assignees

• Shw Automotive Gmbh

Inventors

• Baur Dominik
• Welte Claus
• Frey Jochen

Classifications

• F04B2205/08

  Pressure difference over a throttle · CPC title

• F04B53/16

  Casings; Cylinders; Cylinder liners or heads; Fluid connections · CPC title

• F16J15/0831

  with mounting aids · CPC title

• F16J15/0825

  laminated · CPC title

• F04D29/086

  especially adapted for liquid pumps · CPC title