Rotary kinetic fluid motors or pumps – Including shaft transmission train – brake – clutch – or...
Reexamination Certificate
1999-12-08
2001-08-28
Lopez, F. Daniel (Department: 3745)
Rotary kinetic fluid motors or pumps
Including shaft transmission train, brake, clutch, or...
C415S213100, C417S423600
Reexamination Certificate
active
06280138
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a vertical axis pump for achieving the reduction in height of installation.
BACKGROUND OF THE INVENTION
FIG. 7
shows the structural drawing of the pump station wherein a conventional vertical axis pump is installed. The discharge elbow
12
is mounted onto the 1st floor level
10
, and column pipe
16
, impeller casing
18
as well as the suction bell
20
are suspended vertically as a single body from the discharge elbow
12
into the suction water tank
14
, provided below the 1st floor level
10
. The reduction gearbox
24
, and the driver
26
coupled to it are mounted onto the 2nd floor level
22
provided above the 1st floor level
10
, and the pump shaft
28
coming out of the outer wall of the discharge elbow
12
in the vertical direction is coupled by use of a suitable coupling to the output shaft of the reduction gearbox
24
. Based on drive from the driver
26
, the corresponding rotational speed(RPM) being reduced by the reduction gearbox
24
, the pump shaft
28
is driven by this reduced rotational speed, resulting in water being pumped up by the vertical axis pump.
Regarding the installation construction of conventional vertical axis pump, a pump room of two floor construction is required wherein the discharge elbow is mounted onto the 1st floor level
10
, and the reduction gearbox
24
, as well as the driver
26
are mounted onto the 2nd floor level
22
provided above the 1st floor level
10
. Hence, the construction cost of such a pump room was high. In addition, as the installation height of the vertical axis pump is very high, a crane of high lift was necessary for assembly work, which in itself made assembly work very troublesome. Furthermore, optional equipment such as cooling arrangement for cooling of lubricating oil of reduction gearbox
24
was also required.
DISCLOSURE OF THE INVENTION
It is the object of the present invention to supply a vertical axis pump of low installation height, and thereby eliminate all the problem areas faced for installation of above-mentioned conventional vertical axis pump.
In order to achieve the above-mentioned object, a reduction gearbox is mounted onto the outer wall of the discharge elbow, and the pump shaft coming out through the outer wall of said discharge elbow is coupled to the said reduction gearbox. Further, the said reduction gearbox is mounted onto the outer wall of the said discharge elbow in a one-piece construction.
According to a further feature of the invention, the input shaft of the said reduction gearbox is made to come out in the horizontal direction, the driver is then coupled to it, and this driver may be installed onto the same floor level as that of the said discharge elbow.
According to a further feature of the invention, the said pump shaft penetrated out through the separate wall provided above the outer wall of said discharge elbow, forming an air space between the said separate wall and the outer wall of the said discharge elbow, and also forming a casing for the said reduction gearbox including the said separate wall. The air space is accessible from the surrounding on its either opposite side.
According to a further feature of the invention, including the outer wall of the said discharge elbow, a casing for said reduction gearbox is formed such that the lubricating oil of said reduction gearbox can flow down along the outer wall of said discharge elbow and collect within this casing.
According to another constructional aspect of the invention, air passages with both ends open to the atmosphere and passing through within the casing are provided, a fan is mounted onto the input shaft of said reduction gearbox, and the air draft created by this fan causes the air to flow through these air passages from one open end to the other open end.
According to another constructional aspect of the invention, the output stage gear of the gear train of said reduction gearbox may be mounted onto the pump shaft that comes out through the outer wall of the said discharge elbow.
According to a further preferred feature of the invention, wherein the output stage gear of the gear train of said reduction gearbox is mounted on to a hollow shaft is then inserted into the pump shaft coming out through the outer wall of the said discharge elbow and fixed.
Furthermore, it is also possible such that the pump shaft penetrates out through the separate wall provided above the outer wall of said discharge elbow, and the casing of said reduction gearbox is formed including this separate wall , and also forming a clearance gap co-axial with said pump shaft between the lower end of the hollow shaft and said pump shaft, and fixing as a tight seal , this lower end part to the said separate wall by free insertion of a hollow body co-axial to said pump shaft into this clearance gap.
REFERENCES:
patent: 4145008 (1979-03-01), Wolford
Inagi Kiryo et al., Jul. 21, 1999, Abstract for “Vertical Axis Pump,” Publication No. 11193799.
Inagi Kiyoshi
Satoh Hiroshi
Yoshino Makoto
Director-General Chubu Regional Construction Bureau, Minstry of
Lopez F. Daniel
McAleenan James M
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