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Patent Searching and Data


Title:
VERTICAL SHAFT PUMP
Document Type and Number:
Japanese Patent JPH10159784
Kind Code:
A
Abstract:

To provide an improved pump of vertical shaft type which does not require to pour in a pressurized lubricating water always from outside into a packing box, as otherwise required according to the conventional technique, to lead to enhancement of the economical efficiency and elimination of corrosion of a water pour-in pipe or its clogging with foreign matter.

A vertical shaft pump is structured so that its shaft is sealed by a gland packing 4 and the pressure in the gland part lies approx. in the middle between a positive and a negative pressure, wherein the gland packing 4 is installed in that position within the gland part which becomes a positive pressure at all times, and thereby the amount of lubricating water leaking at a gland leak pipe 7 installed over the gland packing 4 is sensed, and only when no lubricating water leaks from the gland leak pipe 7, lubricating water is poured in from the gland seal pipe 6 provided under the gland packing 4.


Inventors:
YASUDA OSAMU
SHINPO HIROMITSU
Application Number:
JP31612696A
Publication Date:
June 16, 1998
Filing Date:
November 27, 1996
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F04D15/00; (IPC1-7): F04D15/00
Attorney, Agent or Firm:
Ishikawa Arata