Hydraulic machine

Patent metadata

Field	Value
Publication number	US-9617968-B2
Application number	US-201214122212-A
Country	US
Kind code	B2
Filing date	Jul 26, 2012
Priority date	Oct 19, 2011
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

The invention relates to a hydraulic machine having an impeller wheel that comprises a plurality of impeller blades; having a spiral housing that encloses the impeller wheel and that is open toward said impeller wheel by a circumferential slit formed by two circumferential edges; having a traverse ring, comprising two traverse ring decks that are connected to one another by tension anchors; wherein the spiral housing is composed of segments that meet in the flow direction and that are welded to each other, the ends of which segments stand on the respective traverse ring deck and are welded to said deck; wherein at the meeting point between two segments that are adjacent to one another and one traverse ring deck a stiffening element is provided that protrudes into the inner space of the spiral housing; and wherein the extension of the stiffening element into the inner space of the spiral housing is so small that the flow is not affected in a significant manner.

First claim

The invention claimed is:

1. A hydraulic machine comprising:
a blade wheel including a plurality of blades;
a spiral housing enclosing the blade wheel and being open towards the blade wheel by a circumferential slit formed by two circumferential edges;
a traverse ring having two traverse ring decks connected to each other by tie rods, wherein the spiral housing is made of segments which abut one another and are welded together, ends of the segments standing on a respective one of the two traverse ring decks and are welded to said deck;
a stiffening element protruding into the spiral housing is provided at an abutment point between two of the segments that are adjacent to one another and the respective one of the two traverse ring decks;
wherein the stiffening element protrudes into the spiral housing without influencing a flow of a medium in the spiral housing, and wherein the stiffening element is formed as a retracted corner.

2. The hydraulic machine according to claim 1 , wherein the retracted corner is formed by flanging radially inner corner regions of each of the segments.

Assignees

• Hyneck Sebastian
• Wengert Gerhard
• Voith Patent Gmbh

Inventors

• Hyneck Sebastian
• Wengert Gerhard

Classifications

• F03B3/02 Primary

  with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines {(rotors per se F03B3/125)} · CPC title

• Y02E10/223

  Cross-Sectional Technologies · mapped topic

• Y02P70/525

  Cross-Sectional Technologies · mapped topic

• F03B11/04

  for diminishing cavitation or vibration, e.g. balancing · CPC title

• F03B3/186

  Spiral or volute casings · CPC title