CA2020421A1 - Housing seal chamber body - Google Patents
Housing seal chamber bodyInfo
- Publication number
- CA2020421A1 CA2020421A1 CA002020421A CA2020421A CA2020421A1 CA 2020421 A1 CA2020421 A1 CA 2020421A1 CA 002020421 A CA002020421 A CA 002020421A CA 2020421 A CA2020421 A CA 2020421A CA 2020421 A1 CA2020421 A1 CA 2020421A1
- Authority
- CA
- Canada
- Prior art keywords
- opening
- end portion
- seal chamber
- seal
- housing
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/002—Sealings comprising at least two sealings in succession
- F16J15/004—Sealings comprising at least two sealings in succession forming of recuperation chamber for the leaking fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S277/00—Seal for a joint or juncture
- Y10S277/93—Seal including heating or cooling feature
Abstract
ABSTRACT OF THE DISCLOSURE
A seal chamber housing is provided for equipment with rotating shafts and the body includes a stepped conical bore open at the pumping mechanism end said bore defining a seal chamber affording greater volume about the associated mechanical seals and a tapered bushing is optionally sealingly seated in the large diameter end of the stepped conical bore for excluding pump fluid from the seal chamber and/or preventing loss of seal flush liquid from within the seal chamber. In addition, the seal chamber includes upper and lower vent and drain ports primarily for use when the optional bushing is in place and said chamber also includes flushing fluid ports, a closed temperature-controlling external fluid channel and external air cooling features, all of which coact in various operating environments to provide longer and more efficient mechanical seal life.
A seal chamber housing is provided for equipment with rotating shafts and the body includes a stepped conical bore open at the pumping mechanism end said bore defining a seal chamber affording greater volume about the associated mechanical seals and a tapered bushing is optionally sealingly seated in the large diameter end of the stepped conical bore for excluding pump fluid from the seal chamber and/or preventing loss of seal flush liquid from within the seal chamber. In addition, the seal chamber includes upper and lower vent and drain ports primarily for use when the optional bushing is in place and said chamber also includes flushing fluid ports, a closed temperature-controlling external fluid channel and external air cooling features, all of which coact in various operating environments to provide longer and more efficient mechanical seal life.
Description
HOUSING SEAL CHAMBER BODY
This invention relates to a seal chamber housing for a pump shaft and including structure for substantially closing the inner end of the seal chamber against the movement of pumped fluid thereinto. The seal chamber additionally includes structure which provides for additional cha~ber volume about co-actinq stationary and rotating seal components in the outer end o~ the chamber, venting and draining of the seal chamber, flushing of the seal chamber as required, air cooling of the seal chamber body and/or liquid cooling (or heating) of the seal chamber body about the seal chamber, and provisions for monitoring operating temperatures of the cha~ber housing, all of which features are provided to extend the operating life of the stationary and rotary seal components in the outer portion of the seal chamber under various operating conditions.
Various different forms of cooling arrangements, labyrinth fluid seals and forced air cooling of seal chamber bodies heretofore have been provided such as those disclosed in U.SilPatent Nos. 1,873,267, 2,824,759, 2,846,245, 4,471,963 ~ 4,531,746.~ 1~ However, these fl~S 15~ l5l~2 previously known st~uctures do not include the combination of structural and operational features of the instant invention.
The seal chamber housing of the instant invention includes a central opening therethrough for receiving a rotary pump shaft and the opening includes an inner end portion, an outer end portion and an optional intermediate length mid-portion disposed between the .. ~ ~ . - . - .
202~421 inner and outer end portions. The inner portion tapers outwardly and terminates outwardly in an optional radially, inwardly projecting annular shoulder and the mid-portion also tapers outwardly from adjacent the inner periphery of the shoulder and the outer end portion tapers outwardly from the termination of the mid-portion and at a greater angle than the taper of the mid-portion and/or the inner end portion.
An optional tapered annular bushing may be seated within the inner end portion of the opening and the inner periphery thereof may define a labyrinth seal.
The more greatly tapered outer end portion of the opening and the adjacent end of the mid-portion of the opening are adapted to receive co-acting stationary and rotary seals therein and the chamber has vent and drain ports opening thereinto at the major diameter end of the mid-portion of the opening and flushing ports opening thereinto at the minor diameter end of the mid-portion of the opening in outwardly inclined directions. Also, a liquid cooling channel extends about outer side of the chamber body about the inner end portion and mid-portion of the opening and air cooli~g structure i8 provided on the outer side of the chamber body outwardly of the aforementioned channel.
The main object of this invention is to provide a seal chamber for containing co-acting stationary and rotary seal components and designed to greatly extend the operation life of the stationary and rotary seal components.
A further object of this invention is to provide a seal chamber designed specifically to provide appreciably greater chamber volume about the stationary and rotary seal components therein for more effective cooling and cleaning of the seal components.
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, . :
Another object of this invention is to provide a seal chamber housing including external air cooling structure for atmospheric cooling of the chamber housing for applications not requiring the more intensive cooling provided by an external fluid cooling system.
Still another important object of this invention is to provide a seal chamber housing incorporating an external fluid cooling (or heating) channel therein for external fluid cooling (or heating) of the chamber body for applications requiring enhanced cooling or applications requiring heating of the housing and enclosed chamber contents.
Yet another ob;ect of this invention is to provide a seal chamber including structure designed to greatly facilitate flushing of the seal chamber in an area thereof disposed about the stationary and rotary seal components.
Another object of this invention is to provide an optional bushing for substantially closing the inner end of the tapered seal chamber against the entrance of a pumped fluid therein and/or against the loss of seal flush liguid from within the chamber volume.
Another important object of this invention is to provide a seal chamber which may be readily vented and drained when the optional bushing is utilized.
A final object of this invention to be specifically enumerated herein is to provide a seal chamber housing in accordance with the preceding objects and ~which will conform to co m entional forms of manufacture, be of simple construction and dependable in operation 80 as to provide a device that will be economically feasible, long-lasting and relatively trouble free.
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2020~21 These, together with other ob;ects and advantages which will become subsequently apparent, reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout.
Figure 1 is a front elevational view of the preferred form of the seal chamber housing of the instant invention as seen from the outer side thereof;
Figure 2 is an enlarged fragmentary vertical sectional view taking substantially upon the plane indicated by the section line 2-2 of Figure 1: and Figure 3 is a further enlarged fragmentary horizontal sectional view taking substantially upon the plane indicated by the section line 3-3 of Figure 1.
Referring now more specifically to the drawings the numeral 10 generally designates the seal chamber housing of the instant invention.
The body 10 is annular in configuration and defines a central opening 12 extending therethrough including inner and outer end portions 14 and 16 and an intermediate length mid-portion 18.
The outer periphery of the body 10 defines an abutment flange 20 for abutting against and sealed engagement with a pump body casing and the opening 12 receives an associated pump shaft 22 therethrough.
Co-acting rotating and stationary ~eal components 24 and 26 are to be used in forming a seal between the shaft 22 and a gland 28 removable secured to the outer side of the body 10 against an annular gasket 30 disposed between the gland 28 and the body 10.
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'` :- '' . , The inner end portion 14 is outwardly tapered and terminates outwardly at a radially, inwardly projecting abutment shoulder 32 and the mid-length portion 18 also outwardly tapers at substantially the same angle as the inner end portion 14.
An optional tapered bushing 34 may be removably seated within the inner end portion 14 through the utilization of a snap ring 36 and the outer periphery of the minor diameter end of the bushing 34 includes a rabbet 38 in which an O-ring 40 is received forming a fluid tight seal between the bushing 34 and the inner end portion 14 of the opening 10. The seating of the bushing 34 within the outer end portion 14 of the opening 12 enables the O-ring seal 40 to form a proper seal without any chance of the O-ring seal 40 being over compressed.
The inner periphery of the annular bushing 34 may be provided with labyrinth grooves 42 which are operative to substantially block the seal chamber 44 defined by the outer end portion and the mid-portion of the opening 12 ; against the entrance of pumped fluid therein and/or against logs of geal flush liquid from within.
The greater taper of the outer end portion 16 of the opening 12 provides for considerably greater chamber volume extending about the interface 46 between the seal components 24 and 26 thereby enabling greater cooling thereof by fluid within the chamber 44.
Upper and lower vent and drain ports 48 and 50 open into the major diameter end portion of the mid-portion 44 of the opening 16 at the upper and lower peripheries, respectively, thereof and may be utilized to drain and/or vent fluids from the chamber 44. The outer portions of the ports 48 and 50 include pipe thread equipped counterbores whereby the ports 48 and 50 may be plugged or have threaded pipe fittings operatively - . . -. :
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engaged therein.
In addition, circulation ports 52 and 54 open into the minor diameter end portion of the mid-portion 18 of the opening 12 in a direction inclined toward the outer end`portion 16 of the opening 12 to provide a spiral flow of flush liquid around interface 46 for optimum cooling, cleaning, and lubricating of seal components 24 and 26. The ports 52 and 54 also include pipe thread equipped outer end large counterbores.
Suitable flushing liquids may be pumped into the chamber 44 via either (or both~ of the ports 52 and 54.
It will be noted from Fig. 1 of the drawings that the pipe-threaded counterbores of ports 52 and 54 are disposed upon a chord of the opening 12. Further, the body 10 may also be mounted in a 180 angularly displaced position such that the ports so and 48 are disposed uppermost and lowermost, respectively, and the ports 52 and 54 will be disposed above the center axis of the opening 12 as opposed to below the center axis of the opening 12. This unique placement of ports 48, 50, 52, and 54 provides for improved accessibility to ports 52 and 54 when required.
The outer side 56 of the body 10 includes an annular outwardly opening cooling channel 58 formed therein and the outer extrememity of the cooling channel 58 is removably closed by a double 0-ring equipped annular closure plate 60 removably secured over the open outer side of the cooling channel 58 by the utilization of a snap ring 62. The closure plate 60 includes fluid circulation ports 64 formed therethrough by which cooling (or heating) fluid may be caused to flow through the chamber 58. Further, from a comparison of Figs. 1 and 2, it may be seen that the outer side 56 of the body 10 is provided with circumferentially spaced outer periphery ..~ .. - .. ...
. .; .
air cooling recesses 68.
Because the mid-portion 18 of the opening 12 is tapered outwardly at a shallow angle and the outer end portion 16 is tapered outwardly at a sharper angle than the taper of the mid-portion or inner end portion, appreciably more volume of the chamber 44 is disposed about the plane of the interface 46 between the seal components 24 and 26. Thus, a greater flushing action of the seal interface area and cooling action thereon is enabled.
The diametrically opposite ports 48 and 50 may be used for venting and draining the chamber 44, when desired and the ports 52 and 54 may be used for flushing the chamber 44 and, in particular, the area of the chamber 44 which is disposed in the plane of the interface 46 between the seal components 24 and 26.
Still further, fluid cooling of the body 10 immediately about the chamber 44 may be effected by passing cooling fluid through the ports 64 and the chamber 58, or such fluid may be used for heating purposes, if desired.
Also, the recesses 68 provide for ambient air cooling of the outer periphery of the body 10.
: It is also pointed out that the stepped conical opening 12, and particularly the mid-portion 18 and outer end portion 16 thereof, supports a discontinuous vortexing action of the liquid within the chamber 44 to promote cooling and to provide for removal or reduction of solids or debris from around the plane of the interface 46 of the seal components 24 and 26. These solids may then be drained via port 50 (or 48) when the optional bushing 34 is in place. When optional bushing 34 i~ not inserted, this said vortexing action is continued and completed along the inner end portion 14 thus removing solids or debris into the pumping mechanism : .:
for removal from the pump via the pump dischar~e.
A chamber having a single surface with, for example, a constant taper would generally form a continuous vortex resulting in higher fluid velocities causing abrasive particles in the fluid to spin at these higher velocities against the OD wall of the chamber causing premature wear. In addition, one continuous vortex would generally create a higher vacuum situation at the vortex center resulting in poor lubrication and dry running of the seal faces because of the naturally occurring pressure depression at the center.
The present invention with stepped surfaces and changing tapers, on the other hand, results in a discontinuous vortex or multiple vortices which force the entrained particles away from the seal faces to the outer wall of the chamber, but at lower velocities resulting in less wear.
In addition, a discontinuous vortex or multiple vortices result in a less intense vacuum situation in the vicinity of the seal faces reducing the possibility of dry running.
Also, as previously herein before set forth, the stepped conical opening 12 insures maximum liquid volume around the mating faces of the seal components 24 and 26, thus providing a proper heat sink for cooling of the mechanical seal faces and the provision of the chamber 58 and the cover plate 60 enable positive and precisely controlled cooling (or heating) of the area of the body 10 defining chamber 44.
The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown - . . -. .
.
:' ~`' . .
, 2020~21 and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.
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This invention relates to a seal chamber housing for a pump shaft and including structure for substantially closing the inner end of the seal chamber against the movement of pumped fluid thereinto. The seal chamber additionally includes structure which provides for additional cha~ber volume about co-actinq stationary and rotating seal components in the outer end o~ the chamber, venting and draining of the seal chamber, flushing of the seal chamber as required, air cooling of the seal chamber body and/or liquid cooling (or heating) of the seal chamber body about the seal chamber, and provisions for monitoring operating temperatures of the cha~ber housing, all of which features are provided to extend the operating life of the stationary and rotary seal components in the outer portion of the seal chamber under various operating conditions.
Various different forms of cooling arrangements, labyrinth fluid seals and forced air cooling of seal chamber bodies heretofore have been provided such as those disclosed in U.SilPatent Nos. 1,873,267, 2,824,759, 2,846,245, 4,471,963 ~ 4,531,746.~ 1~ However, these fl~S 15~ l5l~2 previously known st~uctures do not include the combination of structural and operational features of the instant invention.
The seal chamber housing of the instant invention includes a central opening therethrough for receiving a rotary pump shaft and the opening includes an inner end portion, an outer end portion and an optional intermediate length mid-portion disposed between the .. ~ ~ . - . - .
202~421 inner and outer end portions. The inner portion tapers outwardly and terminates outwardly in an optional radially, inwardly projecting annular shoulder and the mid-portion also tapers outwardly from adjacent the inner periphery of the shoulder and the outer end portion tapers outwardly from the termination of the mid-portion and at a greater angle than the taper of the mid-portion and/or the inner end portion.
An optional tapered annular bushing may be seated within the inner end portion of the opening and the inner periphery thereof may define a labyrinth seal.
The more greatly tapered outer end portion of the opening and the adjacent end of the mid-portion of the opening are adapted to receive co-acting stationary and rotary seals therein and the chamber has vent and drain ports opening thereinto at the major diameter end of the mid-portion of the opening and flushing ports opening thereinto at the minor diameter end of the mid-portion of the opening in outwardly inclined directions. Also, a liquid cooling channel extends about outer side of the chamber body about the inner end portion and mid-portion of the opening and air cooli~g structure i8 provided on the outer side of the chamber body outwardly of the aforementioned channel.
The main object of this invention is to provide a seal chamber for containing co-acting stationary and rotary seal components and designed to greatly extend the operation life of the stationary and rotary seal components.
A further object of this invention is to provide a seal chamber designed specifically to provide appreciably greater chamber volume about the stationary and rotary seal components therein for more effective cooling and cleaning of the seal components.
' ' .. ' , '~
, . :
Another object of this invention is to provide a seal chamber housing including external air cooling structure for atmospheric cooling of the chamber housing for applications not requiring the more intensive cooling provided by an external fluid cooling system.
Still another important object of this invention is to provide a seal chamber housing incorporating an external fluid cooling (or heating) channel therein for external fluid cooling (or heating) of the chamber body for applications requiring enhanced cooling or applications requiring heating of the housing and enclosed chamber contents.
Yet another ob;ect of this invention is to provide a seal chamber including structure designed to greatly facilitate flushing of the seal chamber in an area thereof disposed about the stationary and rotary seal components.
Another object of this invention is to provide an optional bushing for substantially closing the inner end of the tapered seal chamber against the entrance of a pumped fluid therein and/or against the loss of seal flush liguid from within the chamber volume.
Another important object of this invention is to provide a seal chamber which may be readily vented and drained when the optional bushing is utilized.
A final object of this invention to be specifically enumerated herein is to provide a seal chamber housing in accordance with the preceding objects and ~which will conform to co m entional forms of manufacture, be of simple construction and dependable in operation 80 as to provide a device that will be economically feasible, long-lasting and relatively trouble free.
.. . .
, . ~ . . - .
.; . . - .. - .
- . ~ ..
- , .~- . . ..
2020~21 These, together with other ob;ects and advantages which will become subsequently apparent, reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout.
Figure 1 is a front elevational view of the preferred form of the seal chamber housing of the instant invention as seen from the outer side thereof;
Figure 2 is an enlarged fragmentary vertical sectional view taking substantially upon the plane indicated by the section line 2-2 of Figure 1: and Figure 3 is a further enlarged fragmentary horizontal sectional view taking substantially upon the plane indicated by the section line 3-3 of Figure 1.
Referring now more specifically to the drawings the numeral 10 generally designates the seal chamber housing of the instant invention.
The body 10 is annular in configuration and defines a central opening 12 extending therethrough including inner and outer end portions 14 and 16 and an intermediate length mid-portion 18.
The outer periphery of the body 10 defines an abutment flange 20 for abutting against and sealed engagement with a pump body casing and the opening 12 receives an associated pump shaft 22 therethrough.
Co-acting rotating and stationary ~eal components 24 and 26 are to be used in forming a seal between the shaft 22 and a gland 28 removable secured to the outer side of the body 10 against an annular gasket 30 disposed between the gland 28 and the body 10.
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'` :- '' . , The inner end portion 14 is outwardly tapered and terminates outwardly at a radially, inwardly projecting abutment shoulder 32 and the mid-length portion 18 also outwardly tapers at substantially the same angle as the inner end portion 14.
An optional tapered bushing 34 may be removably seated within the inner end portion 14 through the utilization of a snap ring 36 and the outer periphery of the minor diameter end of the bushing 34 includes a rabbet 38 in which an O-ring 40 is received forming a fluid tight seal between the bushing 34 and the inner end portion 14 of the opening 10. The seating of the bushing 34 within the outer end portion 14 of the opening 12 enables the O-ring seal 40 to form a proper seal without any chance of the O-ring seal 40 being over compressed.
The inner periphery of the annular bushing 34 may be provided with labyrinth grooves 42 which are operative to substantially block the seal chamber 44 defined by the outer end portion and the mid-portion of the opening 12 ; against the entrance of pumped fluid therein and/or against logs of geal flush liquid from within.
The greater taper of the outer end portion 16 of the opening 12 provides for considerably greater chamber volume extending about the interface 46 between the seal components 24 and 26 thereby enabling greater cooling thereof by fluid within the chamber 44.
Upper and lower vent and drain ports 48 and 50 open into the major diameter end portion of the mid-portion 44 of the opening 16 at the upper and lower peripheries, respectively, thereof and may be utilized to drain and/or vent fluids from the chamber 44. The outer portions of the ports 48 and 50 include pipe thread equipped counterbores whereby the ports 48 and 50 may be plugged or have threaded pipe fittings operatively - . . -. :
".
' - ' . : ~ ' . :
engaged therein.
In addition, circulation ports 52 and 54 open into the minor diameter end portion of the mid-portion 18 of the opening 12 in a direction inclined toward the outer end`portion 16 of the opening 12 to provide a spiral flow of flush liquid around interface 46 for optimum cooling, cleaning, and lubricating of seal components 24 and 26. The ports 52 and 54 also include pipe thread equipped outer end large counterbores.
Suitable flushing liquids may be pumped into the chamber 44 via either (or both~ of the ports 52 and 54.
It will be noted from Fig. 1 of the drawings that the pipe-threaded counterbores of ports 52 and 54 are disposed upon a chord of the opening 12. Further, the body 10 may also be mounted in a 180 angularly displaced position such that the ports so and 48 are disposed uppermost and lowermost, respectively, and the ports 52 and 54 will be disposed above the center axis of the opening 12 as opposed to below the center axis of the opening 12. This unique placement of ports 48, 50, 52, and 54 provides for improved accessibility to ports 52 and 54 when required.
The outer side 56 of the body 10 includes an annular outwardly opening cooling channel 58 formed therein and the outer extrememity of the cooling channel 58 is removably closed by a double 0-ring equipped annular closure plate 60 removably secured over the open outer side of the cooling channel 58 by the utilization of a snap ring 62. The closure plate 60 includes fluid circulation ports 64 formed therethrough by which cooling (or heating) fluid may be caused to flow through the chamber 58. Further, from a comparison of Figs. 1 and 2, it may be seen that the outer side 56 of the body 10 is provided with circumferentially spaced outer periphery ..~ .. - .. ...
. .; .
air cooling recesses 68.
Because the mid-portion 18 of the opening 12 is tapered outwardly at a shallow angle and the outer end portion 16 is tapered outwardly at a sharper angle than the taper of the mid-portion or inner end portion, appreciably more volume of the chamber 44 is disposed about the plane of the interface 46 between the seal components 24 and 26. Thus, a greater flushing action of the seal interface area and cooling action thereon is enabled.
The diametrically opposite ports 48 and 50 may be used for venting and draining the chamber 44, when desired and the ports 52 and 54 may be used for flushing the chamber 44 and, in particular, the area of the chamber 44 which is disposed in the plane of the interface 46 between the seal components 24 and 26.
Still further, fluid cooling of the body 10 immediately about the chamber 44 may be effected by passing cooling fluid through the ports 64 and the chamber 58, or such fluid may be used for heating purposes, if desired.
Also, the recesses 68 provide for ambient air cooling of the outer periphery of the body 10.
: It is also pointed out that the stepped conical opening 12, and particularly the mid-portion 18 and outer end portion 16 thereof, supports a discontinuous vortexing action of the liquid within the chamber 44 to promote cooling and to provide for removal or reduction of solids or debris from around the plane of the interface 46 of the seal components 24 and 26. These solids may then be drained via port 50 (or 48) when the optional bushing 34 is in place. When optional bushing 34 i~ not inserted, this said vortexing action is continued and completed along the inner end portion 14 thus removing solids or debris into the pumping mechanism : .:
for removal from the pump via the pump dischar~e.
A chamber having a single surface with, for example, a constant taper would generally form a continuous vortex resulting in higher fluid velocities causing abrasive particles in the fluid to spin at these higher velocities against the OD wall of the chamber causing premature wear. In addition, one continuous vortex would generally create a higher vacuum situation at the vortex center resulting in poor lubrication and dry running of the seal faces because of the naturally occurring pressure depression at the center.
The present invention with stepped surfaces and changing tapers, on the other hand, results in a discontinuous vortex or multiple vortices which force the entrained particles away from the seal faces to the outer wall of the chamber, but at lower velocities resulting in less wear.
In addition, a discontinuous vortex or multiple vortices result in a less intense vacuum situation in the vicinity of the seal faces reducing the possibility of dry running.
Also, as previously herein before set forth, the stepped conical opening 12 insures maximum liquid volume around the mating faces of the seal components 24 and 26, thus providing a proper heat sink for cooling of the mechanical seal faces and the provision of the chamber 58 and the cover plate 60 enable positive and precisely controlled cooling (or heating) of the area of the body 10 defining chamber 44.
The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown - . . -. .
.
:' ~`' . .
, 2020~21 and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.
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Claims (9)
1. A seal chamber housing including inboard and outboard sides and a central annular body defining a central opening extending therethrough for receiving a rotary shaft, said opening including an inner end portion and an outer end portion, said inner end portion tapering outwardly of the opening, said outer end portion tapering outwardly at a greater taper angle than that of said inner end portion, said outer end portion and said inner end portion being adapted to have co-acting stationary and rotary seal components operatively associated with said shaft disposed therein.
2. The seal chamber housing of claim including a tapered annular bushing removably seated within said inner end portion, annular seal means operatively associated with said bushing and inner end portion forming a fluid tight seal therebetween, said housing including upper and lower vent and drain ports formed therethrough including inner ends thereof opening into the largest diameter of said inner end portion at the upper and lower peripheries thereof closely inward of the minimum diameter end of said bushing, said ports including outer ends thereof opening outwardly through the outer side of said housing.
3. The seal chamber housing of claim 1 including an outwardly opening annular channel formed in the outer side of said housing and of a diameter larger than the diameter of said inner end portion, an annular closure plate removably closable over said channel and including fluid inlet and fluid outlet openings formed therethrough opening into said channel from the outer side of said body and through which temperature controlled fluid may be admitted into and discharged from said channel.
4. The seal chamber housing of claim 2 including an outwardly opening annular channel formed in the outer side of said housing and of a diameter larger than the diameter of said inner end portion, an annular closure plate removably closable over said channel and including fluid inlet and fluid outlet openings formed therethrough opening into said channel from the outer side of said body and through which temperature controlled fluid may be admitted into and discharged from said channel.
5. The seal chamber housing of claim 1 wherein said housing includes flushing ports formed therethrough having selectively openable and closable outer ends opening outwardly through said outer side and inner ends opening into the minor diameter portion of said inner portion at an angle inclined toward said outer end portion, said flushing ports having their inner ends opening into said inner portion at opposite ends of and inwardly along a chord of said opening.
6. The seal chamber housing of claim 2 wherein said housing includes flushing ports formed therethrough having selectively openable and closable outer ends opening outwardly through said outer side and inner ends opening into the minor diameter portion of said inner portion at an angle inclined toward said outer end portion, said flushing ports have their inner ends opening into said inner portion at opposite ends of and inwardly along a chord of said opening.
7. The seal chamber housing of claim 3 wherein said housing includes flushing ports formed therethrough having selectively openable and closable outer ends opening outwardly through said outer side and inner ends opening into the minor diameter portion of said inner portion at an angle inclined toward said outer end portion, said flushing ports having their inner ends opening into said inner portion at opposite ends of and inwardly along a chord of said opening.
8. The seal chamber housing of claim 4 wherein said housing includes flushing ports formed therethrough having selectively openable and closable outer ends opening outwardly through said outer side and inner ends opening into the minor diameter portion of said inner portion at an angle inclined toward said outer end portion, said flushing ports having their inner ends opening into said inner portion at opposite ends of and inwardly along a chord of said opening.
9. The seal chamber housing of claim 2 wherein said inner end portion includes an outer portion thereof defining an intermediate portion of said opening, the inner extremity of said intermediate portion terminating at a radially outwardly projecting annular shoulder against which the minor diameter end of said annular bushing is seated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/513,889 US5035436A (en) | 1990-04-24 | 1990-04-24 | Housing seal chamber body |
| US513,889 | 1990-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2020421A1 true CA2020421A1 (en) | 1991-10-25 |
Family
ID=24045013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002020421A Abandoned CA2020421A1 (en) | 1990-04-24 | 1990-07-04 | Housing seal chamber body |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5035436A (en) |
| CA (1) | CA2020421A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5921552A (en) * | 1994-02-08 | 1999-07-13 | A & A Environmental Seals, Inc. | Emission containment and alignment apparatus and method for fluid systems |
| DE4407416C2 (en) * | 1994-03-05 | 1996-02-01 | Flender Himmelwerk Gmbh | Safety device against the fall of objects that can be moved up and down by motor |
| US5553868A (en) * | 1994-11-03 | 1996-09-10 | Dunford; Joseph R. | Seal cavity throat bushing |
| US5636848A (en) * | 1995-02-22 | 1997-06-10 | Alliedsignal Inc. | Oil seal for a high speed rotating shaft |
| US5873575A (en) * | 1997-04-21 | 1999-02-23 | Delaware Capital Formation, Inc. | Fluid cooled packing case member for compressors and other machinery |
| US20040070152A1 (en) * | 2002-08-05 | 2004-04-15 | Oehman Robert E. | Ventilated pump shaft seal |
| US7555658B2 (en) * | 2004-09-30 | 2009-06-30 | Regents Of The University Of California | Embedded electronics building blocks for user-configurable monitor/control networks |
| EP1996817A4 (en) * | 2005-11-28 | 2011-07-06 | Cadtech Innovations | Bushing and lantern ring for rotary fluid pumping equipment |
| CN101349265B (en) * | 2008-08-20 | 2010-06-16 | 泰安市前进机械制造有限公司 | Concrete delivery pump adjustable double-layer seal assembly |
| EP2672152B1 (en) * | 2011-02-03 | 2017-10-11 | Eagle Industry Co., Ltd. | Magnetic fluid seal |
| JP6013230B2 (en) * | 2013-02-27 | 2016-10-25 | 株式会社小松製作所 | Oil seal |
| CN106050728B (en) * | 2016-07-12 | 2018-11-13 | 浙江工业大学 | A kind of inner wall imitates the seal cavity of cyclone spiral grooves composite construction |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1876515A (en) * | 1932-09-06 | Shaft packing | ||
| US1873267A (en) * | 1928-04-24 | 1932-08-23 | Pacific Pump Works | Cooling arrangement for packing boxes |
| US2846245A (en) * | 1954-07-09 | 1958-08-05 | Gen Electric | Oil deflector for shaft seal with forced ventilation |
| US2912264A (en) * | 1954-12-13 | 1959-11-10 | William H Peck Jr | Journal bearings |
| US2852284A (en) * | 1955-07-08 | 1958-09-16 | Roy E Bryson | Liquid seal for rotating shafts |
| US2824759A (en) * | 1955-10-31 | 1958-02-25 | Borg Warner | Liquid cooled seal |
| US2983529A (en) * | 1958-04-10 | 1961-05-09 | Link Belt Co | Bearing seals |
| DE1914961A1 (en) * | 1968-03-27 | 1969-10-09 | English Electric Co Ltd | Shaft seal |
| US3854732A (en) * | 1971-01-12 | 1974-12-17 | Freudenberg C Kg | Sealing arrangement |
| US4190538A (en) * | 1978-09-22 | 1980-02-26 | E. I. Du Pont De Nemours And Company | Pump seal flush |
| JPS58128567A (en) * | 1982-01-25 | 1983-08-01 | Eagle Ind Co Ltd | Mechanical seal |
| US4402515A (en) * | 1982-03-17 | 1983-09-06 | General Motors Corp. | Labyrinth seal with contamination trap |
| BR8208102A (en) * | 1982-12-10 | 1984-11-27 | Caterpillar Tractor Co | FLUID SEALING DEVICE |
| US4471963A (en) * | 1984-01-09 | 1984-09-18 | Luwa Corporation | Sealing member for rotating shaft and method of sealing therewith |
-
1990
- 1990-04-24 US US07/513,889 patent/US5035436A/en not_active Expired - Lifetime
- 1990-07-04 CA CA002020421A patent/CA2020421A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US5035436A (en) | 1991-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19980501 |