US3795362A - Centrifuge bowl having an improved nozzle assembly - Google Patents

Centrifuge bowl having an improved nozzle assembly Download PDF

Info

Publication number
US3795362A
US3795362A US00258797A US3795362DA US3795362A US 3795362 A US3795362 A US 3795362A US 00258797 A US00258797 A US 00258797A US 3795362D A US3795362D A US 3795362DA US 3795362 A US3795362 A US 3795362A
Authority
US
United States
Prior art keywords
holder
sleeve
nozzle
combination
set forth
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 - Lifetime
Application number
US00258797A
Other languages
English (en)
Inventor
J Caldwell
L Shapiro
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.)
Alfa Laval AB
Original Assignee
Pennwalt Corp
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 Pennwalt Corp filed Critical Pennwalt Corp
Application granted granted Critical
Publication of US3795362A publication Critical patent/US3795362A/en
Assigned to ALFA-LAVAL AB, GUSTAVSLUNDSVAGEN-147, ALVIK, STOCKHOLM, SWEDEN, A CORP. OF SWEDEN reassignment ALFA-LAVAL AB, GUSTAVSLUNDSVAGEN-147, ALVIK, STOCKHOLM, SWEDEN, A CORP. OF SWEDEN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PENNWALT CORPORATION, A PA CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B04B1/12—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with continuous discharge

Definitions

  • the sleeve is pushed into an opening in the bowl from the interior thereof, and is keyed into place.
  • the holder is pushed into the sleeve from the exterior of the bowl, and is locked into place (by rotation) by a bayonet type connection.
  • a protrusion on the interior of the sleeve serves to stop the rotation of the holder in extreme positions, i.e., a fully locked position and a fully unlocked position.
  • the nozzle is threadably mounted in the outer end of the holder, and is arranged so as to be aligned in a predetermined direction with respect to the bowl when the holder is in its fully locked position.
  • An annular boss is formed on the holder between the bayonet connection and the nozzle, the boss being slidably mounted within the sleeve and serving to guide and support the holder while simultaneously shielding the bayonet connection.
  • a nozzle per se should be constructed from an abrasion resistant material. Often, the nozzle is brazed into a nozzle holder, as opposed to being removably mounted therein by threads, a bayonet type connection, or similar means. Consequently, when the nozzle becomes worn, the entire nozzle holder must be discarded, or the worn nozzle removed and replaced with a new one which involves a rebrazing operation.
  • By removably mounting the nozzle in the nozzle holder it can be readily inserted and removed from the exterior of the nozzle holder without removing the latter from the retainer sleeve, thus facilitating cleaning of the assembly, and nozzle replacement.
  • nozzle holders having removably mounted nozzles mounted therein have been used, these nozzle holders have been held within a retainer sleeve by a second threaded locking sleeve, the retainer sleeve being keyed into the opening formed in the bowl.
  • Use of such a threaded locking sleeve requires considerable time for installation and removal of the nozzle holder, and also requires care in handling the fine threads so as to prevent damage thereto.
  • care must also be exercised so as to keep the threads clean.
  • the nozzle holder have the capability of being quickly installed from exterior of the bowl without using a threaded connection. Where this has been done with a connecting lug and groove arrangement, however, no means has been provided to shield the connecting lug and groove from the surrounding environment so as to prevent the buildup of solid materials on the connecting lug and groove (e.g., see U.S. Pat. No. 2,695,748).
  • a centrifuge bowl having a nozzle assembly wherein the nozzle holder can be mounted within a retainer sleeve from the exterior of the bowl by means of a bayonet type connection, and wherein means are provided for shielding the bayonet connection from foreign materials, and for supporting the nozzle holder within the retainer sleeve.
  • a removably mounted nozzle which can be readily separated from the nozzle holder for cleaning and replacement.
  • the present invention relates to a centrifuge bowl having an improved nozzle assembly mounted therein.
  • the nozzle assembly is comprised of 3 main components, a retainer sleeve, a nozzle holder, and a nozzle.
  • Such a nozzle assembly might be incorporated, for example, into a disc type centrifuge as illustrated in U.S. Pat. No. 3,075,696.
  • the retainer sleeve is pushed into an opening in the centrifuge bowl from the interior of the bowl, and is aligned and held in a predetermined angular position by means of a key and'groove arrangement.
  • a shoulder formed on the outer periphery of the retainer sleeve prevents the latter from being propelled outwardly during rotation of the bowl.
  • a sealing ring is mounted between the centrifuge bowl and retainer sleeve to prevent leakage around the latter.
  • a nozzle holder has a nozzle threadably mounted in the outer end thereof; a sealing ring is mounted between them to prevent leakage around the nozzle.
  • a bayonet type connection is used by forming a lug on the nozzle holder which cooperates with a channel formed in the retainer sleeve after the nozzle holder is pushed into the retainer sleeve to a position permitting rotation between the two.
  • the nozzle holder is dimensioned so as to have a slidable fit with the inner portion of the interior of the retainer sleeve; a sealing ring is mounted between the two to prevent leakage around the nozzle holder.
  • a first protrusion angularly aligns the retainer sleeve within the opening in the centrifuge bowl.
  • a second protrusion on the interior of the retainer sleeve is positioned so as to stop the nozzle holder in two extreme positions, a fully unlocked and a fully locked position.
  • the nozzle holder is also provided with an annular boss which extends around the outer periphery thereof, the annular boss being positioned so that the outer face thereof is flush with the outer end of the retainer sleeve when the nozzle holder has been pushed inwardly to a position where the lug on the nozzle holder can be rotated into the channel in the retainer sleeve.
  • the annular boss is dimensioned so as to have a slidable fit with respect to the outer portion of the interior of the retainer sleeve, thus supporting the nozzle holder, and shielding or sealing the bayonet connection from foreign materials, and from the material being discharged through the nozzle.
  • a tool engaging slot formed on the outer end of the nozzle holder is arranged to visually indicate when the nozzle holder has been rotated to its fully locked position.
  • FIG. 1 illustrates an exploded view of an embodiment of the nozzle assembly.
  • FIG. 2 illustrates a cross-sectional view of an embodiment of the invention taken through the centrifuge bowl and retainer sleeve, showing the nozzle assembly in its mounted condition.
  • FIG. 3 is a cross-sectional view taken through line 3-3 of FIG. 2, showing the key which aligns and holds the retainer sleeve in a predetermined angular position within the opening in the centrifuge bowl, and showing how one end of the lug on the nozzle holder abuts one side of the key when the nozzle holder is in a fullylocked position.
  • FIG. 4 is a cross-sectional view taken through line 4-4 of FIG. 2.
  • FIG. 5 is a cross-sectional view taken through line 5-5 of FIG. 2, showing the nozzle in its mounted condition, and showing the detailed construction of the nozzle.
  • the present invention relates to a centrifuge bowl having an improved nozzle assembly for discharging heavy phase material which has been separated within the separation chamber.
  • the main components of nozzle assembly comprise a retainer sleeve 11, a nozzle holder 12, and a nozzle 14.
  • first element is said to be slidably mounted within a second element, it means that the first element is dimensioned so as to have a slidable fit within the second element; as opposed to threadably mounted, it also means that the first element can be inserted into or withdrawn from the second element by pushing or pulling the first element respectively.
  • Sleeve 11 is slidably mounted with an interference fit within an opening 16 formed in centrifuge bowl 18 by pushing the sleeve into the opening from the inside of the bowl; as can be seen, sleevell will move outwardly until an annular surface 20 of annular shoulder 22 formed on the outer periphery of sleeve 11 abuts annular surface 24 of annular shoulder 26 defined by the opening 16.
  • a sealing ring 28 is mounted between the sleeve and bowl 18.
  • a lug 30 Formed on the interior of sleeve 11 is a lug 30, which together with the annular surface 32 of shoulder 34, defines a channel 36, the latter being sized so as to accept a complementary lug 38 on holder 12 so as to lock the latter into the sleeve.
  • a sealing ring 43 is mounted between sleeve 11 and holder 12.
  • Holder 12 will move inwardly until the inner surface 44 of lug 38 abuts annular surface 32 of shoulder 34. In this position, the holder 12 is rotated as viewed in FIG. 1 so as to rotate lug 38 into channel 36. The holder will rotate until the end 46 of'lug 38 abuts side 48 of key 50, at which point, the holder is in a fully locked position (see FIG. 3 also).
  • holder 12 When it is desired to unlock and remove the holder 12 from sleeve 11, the holder is rotated in the opposite direction, rotating lug 38 out of channel 36 until the other end 52 of lug 38 abuts the other side 54 of key 50, at which point the holder is in a fully unlocked position. At this point, holder 12 can be pulled from sleeve 11.
  • a slot 56 is formed on the outer end thereof for engaging a screwdriver or other tool; the slot is arranged so that it will also provide a visual indication of when the holder is in its fully locked position, the slot having a known alignment when holder 12 is so positioned.
  • I-Iolder 12 is also provided with an annular boss 58 which is slidably mounted within the outer portion 60 of the sleeve, this boss serving to guide and support holder 12 within the sleeve, and also to shield the interior of the sleeve from the material being discharged through nozzle 14.
  • sealing ring 62 is shown mounted between annular boss 58 and retainer sleeve 11, this may be omitted if desired.
  • boss 58 is arranged so that the outer face 64 thereof is flush with the end 66 of sleeve 11 when this position is reached, i.e., when inner surface 44 of lug 38 abuts annular surface 32.
  • nozzle 14 includes an abrasion resistant insert 68 which is secured within an outer casing 70 by an epoxy glue or other means, the casing being threadably mounted in nozzle holder 12.
  • a lateral extension 72 Formed on the outer end of casing 70 is a lateral extension 72 which extends around the periphery thereof.
  • a sealing ring 74 is mounted between the holder 12 and lateral extension 72.
  • each assembly is mounted within the bowl so as to discharge material in a predetermined direction with respect thereto.
  • this predetermined direction is outwardly at an acute angle from a vertical plane which is tangent to the outer periphery of bowl 18 at the centerline of opening 16 (see FIG. 2), and downwardly at an acute angle from a horizontal plane extending through the same centerline (see FIG. 5). It is to be understood that this predetermined direction is not fixed and may be varied if desired.
  • the material is discharged so as to optimize power recovery and minimize contact with the exterior of the bowl and the other nozzle assemblies.
  • material will be discharged from separation chamber 75 via passageway 77 and nozzle outlet 79, the latter being disposed so as to discharge the material in the predetermined direction when the assembly is properly mounted within opening 16.
  • nozzle 14 To mount nozzle assembly 10 within bowl 18 so that nozzle 14 faces in its predetermined direction with respect to the bowl, key 50 is extended completely through retainer sleeve 11 so as to cooperate with a complementary groove 78 (See FIGS. 3 and 4). Thus, sleeve 11 is aligned and held in a predetermined angular position within opening 16.
  • lug 30, lug 38, and key 50 With properly designing and arranging nozzle 14, lug 30, lug 38, and key 50 with respect to each other, nozzle 14 will be disposed in its proper predetermined discharge position with respect to bowl 18 when sleeve 11 is mounted within opening 16 as shown with holder 12 moved to its fully locked position.
  • each of the lugs 30 and 38 extend'approximately 160 around in the present embodiment.
  • abutting shoulders 22 and 26 are the primary means utilized for holding sleeve 11 in a predetermined axial position during rotation of bowl 18, i.e., for preventing the sleeve from being propelled outwardly via centrifugal force. It is noted, however, that key 50 and complementary groove 78 (see FIG. 4) would also prevent sleeve 11 from being propelled outwardly during rotation of bowl 18. Consequently, within the scope of the present invention, shoulders 22 and 26 could be eliminated, and one or more keys and grooves or other means could be utilized for holding sleeve 11 in a predetermined axial position during rotation of bowl 18. It is also within the scope of the present invention to form the nozzle within the nozzle holder by drilling or otherwise forming a suitable opening in the nozzle holder.
  • a centrifuge bowl defining a separation chamber, wherein said bowl is adapted to rotate about an axis of rotation and has an opening extending therethrough for the outward discharge of heavy phase material separated within said chamber, of a nozzle assembly, said assembly comprising a retainer sleeve which is slidably mounted within said opening, means for holding said sleeve in a predetermined angular and axial position within said'opening during rotation of said how], a nozzle holder having a portion of circular cross-section, said holder portion being slidably mounted within the inner portion of the interior of said sleeve, said assembly having means for locking said holder against axial movement with respect to said sleeve by rotating said holder in one direction after said holder portion has been pushed inwardly to a predetermined position within said inner portion, and means for stopping said holder in a fully locked position by stopping said rotation thereof in said first direction at a predetermined point.
  • said nozzle assembly further including means defining a nozzle within said holder outwardly from the outer end of said sleeve, said nozzle, said locking means, and said stopping means each' being disposed with respect to each other so that when said holder is rotated to its fullylocked position, said nozzle will be in a predetermined discharge position with respect to said bowl,
  • said opening defines a first annular shoulder having an annular inwardly facing surface
  • said sleeve has a second annular shoulder having an annular outwardly facing surface formed on the outer periphery of said sleeve, wherein said first and second shoulders abut each other
  • said means for holding said sleeve in said predetermined axial position within said opening comprises said first and second shoulders
  • said nozzle has an abrasion resistant insert secured therein, wherein the outer end of said nozzle has a lateral extension formed around its periphery, and further including a sealing ring mounted between said extension and said holder.
  • said opening defines a first annular shoulder having an annular inwardly facing surface
  • said sleeve has a second annular shoulder having an annular outwardly facing surface formed on the outer periphery of said sleeve, wherein said first and second shoulders abut each other, and wherein said means for holding said sleeve in said predetermined axial position within said opening comprises said first and second shoulders.

Landscapes

  • Centrifugal Separators (AREA)
US00258797A 1972-05-31 1972-05-31 Centrifuge bowl having an improved nozzle assembly Expired - Lifetime US3795362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25879772A 1972-05-31 1972-05-31

Publications (1)

Publication Number Publication Date
US3795362A true US3795362A (en) 1974-03-05

Family

ID=22982162

Family Applications (1)

Application Number Title Priority Date Filing Date
US00258797A Expired - Lifetime US3795362A (en) 1972-05-31 1972-05-31 Centrifuge bowl having an improved nozzle assembly

Country Status (8)

Country Link
US (1) US3795362A (es)
JP (1) JPS4950562A (es)
CA (1) CA959807A (es)
DE (1) DE2322491A1 (es)
FR (1) FR2186297B1 (es)
GB (1) GB1401162A (es)
IT (1) IT984943B (es)
SE (1) SE395227B (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5403486A (en) * 1991-12-31 1995-04-04 Baker Hughes Incorporated Accelerator system in a centrifuge
US5423734A (en) * 1991-11-27 1995-06-13 Baker Hughes Incorporated Feed accelerator system including feed slurry accelerating nozzle apparatus
US6216959B1 (en) * 1997-10-17 2001-04-17 Fluid-Quip, Inc. Nozzle for centrifuge rotors and method of removing same
US20110154678A1 (en) * 2009-12-30 2011-06-30 Daewoo Electronics Corporation Dryer
EP2962762A1 (en) * 2014-07-04 2016-01-06 Andritz Frautech S.r.l. Discharge nozzle for nozzle separator
WO2017186459A1 (de) * 2016-04-29 2017-11-02 Gea Mechanical Equipment Gmbh Auslassdüse für eine zentrifugentrommel, zentrifugentrommel und montagewerkzeug

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5399672U (es) * 1977-01-18 1978-08-12
JP2691867B2 (ja) * 1994-05-17 1997-12-17 進 小坂 門扉装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE605597C (de) * 1934-11-14 Separator Nobel Ab Schleudertrommel zur kontinuierlichen Zerlegung von Fluessigkeitsgemischen, insbesondere solchen, welche Kohlenwasserstoffoele, Saeureharz und Saeure enthalten
US2911139A (en) * 1955-12-20 1959-11-03 Dorr Oliver Inc Centrifuge construction
US3075696A (en) * 1959-05-07 1963-01-29 Sharples Corp Centrifuge nozzle holders

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695748A (en) * 1952-01-22 1954-11-30 Merco Centrifugal Co Centrifuge nozzle construction
DE1008660B (de) * 1952-07-14 1957-05-16 Merco Centrifugal Company Zentrifuge mit einer sieblosen Trommel und Austrittduesen fuer den Ablauf der schweren Bestandteile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE605597C (de) * 1934-11-14 Separator Nobel Ab Schleudertrommel zur kontinuierlichen Zerlegung von Fluessigkeitsgemischen, insbesondere solchen, welche Kohlenwasserstoffoele, Saeureharz und Saeure enthalten
US2911139A (en) * 1955-12-20 1959-11-03 Dorr Oliver Inc Centrifuge construction
US3075696A (en) * 1959-05-07 1963-01-29 Sharples Corp Centrifuge nozzle holders

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5423734A (en) * 1991-11-27 1995-06-13 Baker Hughes Incorporated Feed accelerator system including feed slurry accelerating nozzle apparatus
US5403486A (en) * 1991-12-31 1995-04-04 Baker Hughes Incorporated Accelerator system in a centrifuge
US5527474A (en) * 1991-12-31 1996-06-18 Baker Hughes Incorporated Method for accelerating a liquid in a centrifuge
US6216959B1 (en) * 1997-10-17 2001-04-17 Fluid-Quip, Inc. Nozzle for centrifuge rotors and method of removing same
US20110154678A1 (en) * 2009-12-30 2011-06-30 Daewoo Electronics Corporation Dryer
EP2962762A1 (en) * 2014-07-04 2016-01-06 Andritz Frautech S.r.l. Discharge nozzle for nozzle separator
US20160001303A1 (en) * 2014-07-04 2016-01-07 Andritz Frautech S.R.L. Discharge Nozzle for Nozzle Separator
AU2015203366B2 (en) * 2014-07-04 2019-09-19 Frautech Separators Srl Discharge nozzle for nozzle separator
WO2017186459A1 (de) * 2016-04-29 2017-11-02 Gea Mechanical Equipment Gmbh Auslassdüse für eine zentrifugentrommel, zentrifugentrommel und montagewerkzeug
US11020754B2 (en) * 2016-04-29 2021-06-01 Gea Mechanical Equipment Gmbh Outlet nozzle for a centrifugal drum, centrifugal drum and assembly tool
US20210178407A1 (en) * 2016-04-29 2021-06-17 Gea Mechanical Equipment Gmbh Outlet nozzle for a centrifugal drum, centrifugal drum and assembly tool
US11701669B2 (en) * 2016-04-29 2023-07-18 Gea Mechanical Equipment Gmbh Outlet nozzle for a centrifugal drum, centrifugal drum and assembly tool

Also Published As

Publication number Publication date
JPS4950562A (es) 1974-05-16
CA959807A (en) 1974-12-24
IT984943B (it) 1974-11-20
SE395227B (sv) 1977-08-08
GB1401162A (en) 1975-07-16
FR2186297A1 (es) 1974-01-11
FR2186297B1 (es) 1977-02-11
DE2322491A1 (de) 1973-12-13

Similar Documents

Publication Publication Date Title
US2695748A (en) Centrifuge nozzle construction
US3795362A (en) Centrifuge bowl having an improved nozzle assembly
US4688650A (en) Static separator sub
US2816658A (en) Hydrocyclones
KR920005111B1 (ko) 보우링 및 끌 공구용 공구 손잡이
US3785549A (en) Centrifuge chuck for disposable, snap-in centrifuge rotor
CA1046953A (en) Cyclone and liner
US4006855A (en) Separator worm feed auger and wear plates
US4217226A (en) Pusher centrifuge
GB2057309A (en) Centrifugal separators
US4278534A (en) Method for separation of material mixtures, containing abrasive particles, in a hydrocyclone separator
JP2667224B2 (ja) 遠心分離機
EP0312233B1 (en) Centrifugal separator
US2906449A (en) Flushing of centrifugal separators of the hermetic type
US3079069A (en) Self-opening sludge centrifuge
US3075696A (en) Centrifuge nozzle holders
US5259828A (en) Worm centrifuge
DK142532B (da) Sneglecentrifuge med hel kappe til adskillelse af en faststof-vaeskeblanding
CA1086278A (en) Centrifuge with sludge outlets at rotor periphery
US4564443A (en) Reverse centrifugal cleaning of paper making stock
EP3257587B1 (en) Centrifugal separator with dismountable bowl-hood
US2483342A (en) Cone disk type centrifugal separator bowl
JP6006453B1 (ja) 遠心分離装置
US2911140A (en) Centrifuge construction
US2302168A (en) Centrifugal separator

Legal Events

Date Code Title Description
AS Assignment

Owner name: ALFA-LAVAL AB, GUSTAVSLUNDSVAGEN-147, ALVIK, STOCK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PENNWALT CORPORATION, A PA CORP.;REEL/FRAME:005060/0780

Effective date: 19890130