Sliding ring seal with conveying sleeve

Patent metadata

Field	Value
Publication number	US-9695941-B2
Application number	US-201515114482-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Feb 25, 2014
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

The present invention relates to a mechanical seal arrangement, comprising a rotating slide ring and a stationary slide ring, which define a sealing gap between them, and a delivery device for delivering a fluid, wherein the delivery device comprises a sleeve-like basic body with first through-openings and second through-openings, wherein the delivery device rotates jointly with the rotating slide ring, wherein the first through-openings each have a first entry region on an outer periphery of the sleeve-like basic body and a first exit region on an inner periphery of the sleeve-like basic body, and wherein the second through-openings each have a second entry region on the inner periphery of the sleeve-like basic body and a second exit region on the outer periphery of the sleeve-like basic body.

First claim

The invention claimed is:

1. Mechanical seal arrangement comprising:
a rotating slide ring and a stationary slide ring, which define a sealing gap between them,
a delivery device for delivering a fluid, wherein the delivery device has a sleeve-like basic body configured to provide a first pump stage through first through-openings and second through-openings, and an additional pump stage at an axial end of the sleeve-like basic body,
wherein the delivery device rotates jointly with the rotating slide ring,
wherein the first through-openings each have a first entry region on an outer periphery of the sleeve-like basic body and a first exit region on an inner periphery of the sleeve-like basic body, and
wherein the second through-openings each have a second entry region on the inner periphery of the sleeve-like basic body and a second exit region on the outer periphery of the sleeve-like basic body.

2. Mechanical seal arrangement as claimed in claim 1 , wherein the first through-openings have a geometrical form different from the second through-openings.

3. Mechanical seal arrangement as claimed in claim 1 , wherein the first through-openings are provided as elongate apertures.

4. Mechanical seal arrangement as claimed in claim 3 , wherein the first through-openings extend in the peripheral direction of the sleeve-like basic body.

5. Mechanical seal arrangement as claimed in claim 1 , wherein the second through-openings are provided as cylindrical bores.

6. Mechanical seal arrangement as claimed in claim 1 , wherein the additional pump stage comprises lugs protruding in an axial direction.

7. Mechanical seal arrangement in claim 1 , wherein the second through-openings are disposed in the radial direction below a discharge channel.

8. Mechanical seal arrangement as claimed in claim 1 , wherein the second through-openings are disposed in the radial direction over the rotating slide ring.

9. Mechanical seal arrangement as claimed in claim 1 , wherein the sleeve-like basic body has a first portion with a first outer diameter and a second portion with a second outer diameter, wherein the first outer diameter is smaller than the second outer diameter and wherein the first through-openings are formed in the first portion and also in the second portion.

10. Mechanical seal arrangement as claimed in claim 9 , wherein the second through-openings are formed exclusively in the second portion.

11. Mechanical seal arrangement as claimed in claim 1 , further comprising a housing, wherein a gap is formed between an outer periphery of the sleeve-like basic body and an inner periphery of the housing, this gap comprising a cross-sectional area which is equal to or smaller than a cross-sectional area of the first through-openings and equal to or smaller than a cross-sectional area of the second through-openings.

Assignees

• Eagleburgmann Germany Gmbh

Inventors

• Fichtner Joseph
• Ledig Stefan
• Skrzidlo Joachim
• Kollinger Rudolf
• Bohm Thomas
• Frohlich Daniel

Classifications

• F16J15/3404 Primary

  and characterised by parts or details relating to lubrication, cooling or venting of the seal · CPC title