Turbo-type fluid machine and a stepped seal apparatus to be...

Details Turbo-type fluid machine and a stepped seal apparatus to be... Turbo-type fluid machine and a stepped seal apparatus to be...

2008-03-04

2008-03-04

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade supported radial tip ring and static part

C415S171100, C415S174400, C415S174500

Reexamination Certificate

active

11174501

ABSTRACT:
A turbo-type fluid machine comprises a mouth ring part provided between a shroud of an impeller and a pump casing and having a seal function. The mouth ring part comprises an impeller ring on a side of the shroud of the impeller and a casing ring provided on a side of a non-rotating body wall surface of the casing. The impeller ring is structured to have a stepped portion that is in the form of a staircase with at least two steps to be small in diameter toward a suction side of the impeller and large in diameter toward an outlet of the impeller. The casing ring is labyrinth-shaped to comprise a projection and a recess. A narrow clearance part having a narrow radial clearance is formed between the projection and the impeller ring. A flow passage spatial portion defining an enlarged portion of the narrow radial clearance is formed by the recess and the stepped portion of the impeller ring.

REFERENCES:
patent: 1020699 (1912-03-01), Kieser
patent: 3231285 (1966-01-01), Weltmer et al.
patent: 3516757 (1970-06-01), Baumann
patent: 4286919 (1981-09-01), Yamaguchi
patent: 5639095 (1997-06-01), Rhode
patent: A-11-343996 (1999-12-01), None

Affiliated with

Also associated with

Rating

Turbo-type fluid machine and a stepped seal apparatus to be... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Turbo-type fluid machine and a stepped seal apparatus to be..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Turbo-type fluid machine and a stepped seal apparatus to be... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3922410