Axially split pump

Patent metadata

Field	Value
Publication number	US-2016160873-A1
Application number	US-201514946982-A
Country	US
Kind code	A1
Filing date	Nov 20, 2015
Priority date	Dec 5, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

An axially split pump for a fluid includes an axially split housing with a bottom and a cover, a rotatable shaft, and a side cover. The side cover has a first surface for cooperating with a second surface. The second surface extends over the bottom and the cover. The bottom has a first sealing surface and the cover has a second sealing surface. The bottom and the cover can be fastened so that the sealing surfaces are in direct contact. One sealing groove is in one of the sealing surfaces for the reception of a string-like sealing element, the sealing groove extending up to the second surface. A recess surrounding the shaft is in the second surface and a projection surrounding the shaft is in the first surface. The recess and the projection are arranged so that they form a ring-like groove for the reception of a ring-like sealing element.

First claim

1 . An axially split pump for conveying a fluid, comprising:
an axially split housing including a bottom part and a cover; a rotatable shaft determining an axial direction; and at least one side cover configured to close the housing in the axial direction, the at least one side cover having a first contact surface configured to cooperate with a second contact surface disposed at the housing, the second contact surface extending both over the bottom part and the cover, the bottom part having a first sealing surface and the cover having a second sealing surface, the bottom part and the cover being configured to be fastened to one another so that the first and second sealing surfaces are in direct contact with one another, at least one sealing groove is disposed in one of the first and second sealing surfaces for the reception of a string-like sealing element, the sealing groove extending up to the second contact surface of the housing, a recess surrounding the shaft being disposed in the second contact surface and a projection surrounding the shaft being disposed in the first contact surface of the side cover, the recess and the projection being configured and arranged so as to form form a ring-shaped groove for the reception of a ring-shaped sealing element in a mounted state of the side cover.

2 . A pump in accordance with claim 1 , wherein the string-like sealing element is inserted into the sealing groove and the ring-shaped sealing element is inserted into the ring-shaped groove.

3 . A pump in accordance with claim 1 , in which the string-like sealing element has a planar cross-sectional surface at the second contact surface.

4 . A pump in accordance with claim 1 , wherein the sealing groove opens substantially perpendicularly into the ring-shaped groove.

5 . A pump in accordance with claim 1 , wherein the sealing groove is disposed in the bottom part of the housing.

6 . A pump in accordance with claim 1 , wherein the sealing groove extends from the second contact surface up to an end of the pump disposed opposite with respect to the axial direction, the end being configured to receive a second side cover configured to close the housing, and in which the string-like sealing element is inserted into the sealing groove, the sealing element extending over a total longitudinal extent of the sealing groove.

7 . A pump in accordance with claim 1 , wherein the ring-shaped groove is formed by the recess and the projection has a substantially rectangular cross-sectional surface perpendicular to longitudinal extent thereof.

8 . A pump in accordance with claim 1 , wherein the ring-shaped groove has a width (B) in a radial direction that is larger than a width of the string-like sealing element.

9 . A pump in accordance with claim 1 , wherein the ring-like sealing element is inserted into the ring-shaped groove, the ring-like sealing element having a circular or elliptical cross-sectional surface.

10 . A pump in accordance with claim 1 , wherein the ring-like sealing element has a height in a axial direction that is larger than a depth of the ring-shaped groove in the axial direction.

11 . A pump in accordance with claim 1 , wherein the sealing groove has a cut-out at an opening into the second contact surface, the cut-out being arranged lying radially inward with respect to the sealing groove.

12 . A pump in accordance with claim 11 , further comprising an elastic pre-loading element inserted into the cut-out, the pre-loading element exerting a radially outwardly directed pre-load on the string-like sealing element.

13 . A pump in accordance with claim 12 , wherein the preloading element is spring elastic and extends in parallel with the string-like sealing element.

14 . A pump in accordance with claim 1 , wherein the ring-like sealing element and the string-like sealing element are an elastomer.

15 . A pump in accordance with claim 1 , configured as a centrifugal pump having a design pressure of at least 50 bar.

16 . A pump in accordance with claim 13 , wherein the pre-loading element is a spring.

17 . A pump in accordance with claim 1 , wherein the ring-like sealing element and the string-like sealing element are a nitrile rubber.

18 . A pump in accordance with claim 1 , wherein the ring-like sealing element and the string-like sealing element are a nitrile butadiene rubber NBR.

19 . A pump in accordance with claim 1 configured as a centrifugal pump having a design pressure of at least 100 bar.

Assignees

• Sulzer Management Ag

Inventors

• Handloser Willy
• Welschinger Thomas
• Tischler Heike

Classifications

• F04D29/628

  especially adapted for liquid pumps · CPC title

• F04D29/426

  especially adapted for liquid pumps · CPC title

• F04D29/086

  especially adapted for liquid pumps · CPC title

• F04D1/06 Primary

  Multi-stage pumps (F04D1/02, F04D13/10 take precedence) · CPC title

• F04D29/22

  specially for centrifugal pumps · CPC title