CA1106238A - High pressure pump with seal ring - Google Patents

High pressure pump with seal ring

Info

Publication number
CA1106238A
CA1106238A CA308,506A CA308506A CA1106238A CA 1106238 A CA1106238 A CA 1106238A CA 308506 A CA308506 A CA 308506A CA 1106238 A CA1106238 A CA 1106238A
Authority
CA
Canada
Prior art keywords
casing
impeller
flange
intake port
outwardly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA308,506A
Other languages
French (fr)
Inventor
Angelo J. Crisafulli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of CA1106238A publication Critical patent/CA1106238A/en
Expired legal-status Critical Current

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Abstract

ABSTRACT OF THE DISCLOSURE
A dual intake port rotary centrifugal portable pump with a special sealing ring provided to increase output pressure and efficiency.
The pump includes a housing having axially opposed intake ports, an impeller means within the housing carried by a shaft extending externally of the intake ports and supported by shaft bearings disposed outwardly of the intake ports. Annular flanges are provided on the housing surrounding both intake ports. Annular flanges are also provided on both sides of the impeller with these flanges being concentric with and overlapping the annular flanges provided on the housing. A two-piece seal is provided on each side of the casing. One piece of the seal is adjustably mounted on the annular flange which is attached to the housing while the other piece of the seal is adjustably attached to the annular flange mounted upon the impeller.

Description

The present invention relates to portable centrifugal pumps. More sp~cifically the present invention relates to improvements in rotary pumps for producing a higher discharge pressure and rendering the pump more efficient.
An object of the present invention is to provide a rotary pump wherein the output pressure is increased by use of a two-part sealing means attached to the casing and the impeller.
Another object of the invention is to provide a two-part sealing means with one part attached to the rotor andone part attached to the casing where each part of the sealing means is adjustable to provide for wear and proper fit of the seals.
Yet another object of the invention is to provide a pump with a seal means which is easily accessible and remov-able in the event that a replacement seal must-be installed.
A further object of the invention is to provide a pump which has a seal between the casing and the impeller thereof where the impeller is accurately positioned by means of a main shaft which is supported and journaled by bearings mounted externally to the casing of the pump.
The above objects are met by the present invention which provides a rotary centrifugal pump comprising a pump casing provided with an intake port and a tangential discharge port, a drive shaft extending outwardly from the pump and rotatably supporting an impeller within the casing, a casing flange of cylindrical configuration extending axially outwardly from the casing and forming the intake port, an impeller flange extending axially outwardly from the impeller for rotation therewith, the casing flange being concentric with and radially outwardly of the impeller flange, a first cylindrical seal mounted radially inwardly on the casing flange and a second 23l~
cylindrical seal mounted radially outwardly on the impeller flange for rotation therewith such that the first and second seals form a sealing relationship with each other which impedes the flow of water outwardly between the impeller and casing, the first and second seals being attached by screw threaded fasteners wherein the seals are replaceable.
Figure 1 is a perspective view of the centrifugal purnp of the invention.
Figure 2 is a sectional view along line 2-2 of Fig. 1.
Referring now to Figs. 1 and 2 of the drawings, the pump of the present invention is generally designated by reference numeral 10, The pump includes a casing generally designated as 11 which includes intake portions 12 and dis-charge portion 13. The pump is supplied with power by virtue of drive shaft 14 which extends through both intake ports 12.
The pump includes impeller 20 which is directly attached to drive shaft 14. This impeller is a dual suction impeller which comprises a generally imperforate central disk 21 formed of a suitable material, such as steel plate, for example, rigidly secured to drive shaft 14 as by welds 22.
A plurality of radially extending impeller vanes 23 are rigidly secured to the imperforate central disk 21 such as by means of welding. The impeller may be similar to that shown in the ~-~
inventor's prior Canadian Patent No. 801,432 of December 17,1968.
The casing includes a large removable annular member 24. This annular member is secured by means of studs and bolts 25 to cover a hole in the central portion of the main casing which is large enough to permit removal of impeller 20.
Bearing members 26 are provided to support and jou~nal main shaft 14. One bearing is provided axially displaced to -each side of pump 10. Each of these bearings is mounted upon a support plate 27, Support plate 27 is firmly held in place at a ~ . , ~.

--1.1~'i6,~3~
distance from casing 11 by means of four support bars 28-~ach support plate 27 is of a generally rectangular shape having one of the support bars 2~ at each corner of the rectangle.
On each side of the casing there are provided annular casing flanges 29. These casing flanges extend outward from the casing and surround inlets 12. Attached to and coextensive with flanges 29 are annular seal members 30 which comprise the outer portion of seal 31~ Attached to and extending laterally outward from each side of impeller 20 are impeller flanges 33.
These flanges are attached to opposite sides of the impeller blades 23 and serve to define the intake ports 12. These flanges are concentric with casing flanges 29 and outer seal 30.
Attached to the outer portion of impeller flanges 33 are annular seal members 32. These seal members comprise the inner portion of seal 31, The outer and inner portions of seal 31 form a sealing enga~ement with each other which impedes the flow of water from high pressure outlet 13 to low pressure inlet 12.
Each of the outer seal members 30 and inner seal members 32 is formed in a continuous band out of a suitable material, such as Teflon*, however, any other suitable material may be used.
Inner seal members 32 are preferably attached to impeller flanse 33 by means of studs 34 which are imbedded in the seal members and extend radially inward from the seal members through holes drilled in the *Trademark ` ~ d/~ 2A~

623~

impeller flanges and secured by means of nuts 35. In like manner, the outer seal members 30 are attached to casing flanges 29 by means of studs 15 extending radially outward from the seal members and nuts 16 secured on the studs. This manner of securing the seals onto the flanges is advantageous in that by loosening or tightening the nuts, the pressure of engagement between the two parts of the seal 31 can be varied. This also provides the user with easy accessibility to the seals themselves in the event that they wear out and should be changed.
In operation, it can be seen that the seals 31 are provided to impede the passage of water which has been placed under pressure by impellers 23 when it tries to return to the source through openings 36 between the impeller blades and the pump casing. Without the seals as described in `
this invention, water would be allowed to freely return to its source, thus reducing the pressure produced by the pump at outlet 13. Thus it can be seen that these seals provide for more efficient operation of pump 10.
. ~, . .. .

Claims (2)

The embodiments of the invention, in which an exclusive property or privilege is claimed, are defined as follows:
1. A rotary centrifugal pump comprising a pump casing provided with an intake port and a tangential discharge port, a drive shaft extending outwardly from said pump and rotatably supporting an impeller within said casing, a casing flange of cylindrical configuration extending axially outwardly from said casing and forming said intake port, an impeller flange extending axially outwardly from said impeller for rotation therewith, said casing flange being concentric with and radially outwardly of said impeller flange, a first cylindrical seal mounted radially inwardly on said casing flange and a second cylindrical seal mounted radially outwardly on said impeller flange for rotation therewith such that said first and second seals form a sealing relationship with each other which impedes the flow of water outwardly between the impeller and casing, said first and second seals being attached by screw threaded fasteners wherein said seals are replaceable.
2. A centrifugal pump as claimed in claim 1 and further wherein said pump casing is a dual suction intake port pump casing with a second intake port axially opposed to the first mentioned intake port and wherein said drive shaft additionally extends outward from said second intake port and said impeller is a dual suction intake port impeller, said pump casing additionally including a second casing flange of cylindrical configuration extending axially outwardly from said casing and axially opposed to the first mentioned casing flange to form the second intake port and a second impeller flange extending axially outwardly from said impeller for rotation therewith and axially opposed to the first mentioned impeller flange, said second casing flange being concentric with and radially outwardly of said second impeller flange, a third cylindrical seal mounted radially inwardly on said second casing flange, a fourth cylindrical seal mounted radially outwardly on said second impeller flange for rotation therewith such that said third and fourth seals form a sealing relationship with each other which impedes the flow of water outwardly between the impeller and casing at the intake port, said drive shaft being supported and journaled axially outwardly on each side of said casing by means of a first and a second bearing means mounted external-ly to said casing, each of said bearing means being securely attached to a bearing support plate and said bearing support plates being firmly attached to the exterior of said casing by means of a plurality of rigid bars extending between each of said plates and said casing, each of said third and fourth seals being removably attached to their respective flanges.
CA308,506A 1978-05-09 1978-07-31 High pressure pump with seal ring Expired CA1106238A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90433378A 1978-05-09 1978-05-09
US904,333 1978-05-09

Publications (1)

Publication Number Publication Date
CA1106238A true CA1106238A (en) 1981-08-04

Family

ID=25418959

Family Applications (1)

Application Number Title Priority Date Filing Date
CA308,506A Expired CA1106238A (en) 1978-05-09 1978-07-31 High pressure pump with seal ring

Country Status (1)

Country Link
CA (1) CA1106238A (en)

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