US3014642A - Centrifugal separator - Google Patents

Centrifugal separator Download PDF

Info

Publication number
US3014642A
US3014642A US724183A US72418358A US3014642A US 3014642 A US3014642 A US 3014642A US 724183 A US724183 A US 724183A US 72418358 A US72418358 A US 72418358A US 3014642 A US3014642 A US 3014642A
Authority
US
United States
Prior art keywords
receptacle
rotor
annular
screen
frame
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
US724183A
Other languages
English (en)
Inventor
Lundberg Karl Johan Reinhold
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.)
SENARATOR AB
Original Assignee
SENARATOR AB
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 SENARATOR AB filed Critical SENARATOR AB
Application granted granted Critical
Publication of US3014642A publication Critical patent/US3014642A/en
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B04B7/04—Casings facilitating discharge

Definitions

  • This invention relates to centrifugal separators of the type in which a separated material, discharged through nozzle outlets in a peripheral zone of the centrifugal rotor, is collected in an annularreceptacle surrounding the rotor and located in the separator frame, the recep tacle having an annular slot opening toward the nozzles and having an outlet for the collected material.
  • the receptacle is provided with an annular inner wall extending axially of the rotor and terminating near it at a region located radially inside the nozzle outlets and at one side of the nozzle zone, and with an annular outer wall extending opposite the nozzle outlets and radially inward toward the centrifugal rotor, with which it forms a free annular space at the opposite side of the nozzle zone.
  • Centrifugal separators of this kind are subject to the inconvenience that the outer surfaces of the receptacle and of the centrifugal rotor or bowl, as well as the inner surfaces of the frame, are dirtied by the material which is thrown out through the nozzles and which in most cases contains sludge. If the sludge consists of yeast or resinous substances, the cleaning is both troublesome and costly.
  • the causes of the dirtying are numerous.
  • the receptacle because of its shape, cannot to advantage be made in one piece but is usually made in two pieces, which are then welded together. Consequently, it is both costly and troublesome to make the edges of the annular slot so exact that these edges, after the receptacle has been fitted into a locating recess in the frame, will fit closely and accurately to the centrifugal rotor at opposite sides of the nozzle zone. Any fine-trimming of the receptacle edges after the welding would involve a rather expensive operation.
  • the rotation axis of the centrifuge is variable and, during running of the centrifuge, may assume a position at variance with the edge of the receptacle which was previously trimmed to lie as close as possible to the mantle surface of the centrifugal rotor. Consequently, it has been necessary to make the spacing or slot between the receptacle and the rotor mantle surface greater than desired. This, in turn, has meant that some of the material spouting from the rotor nozzles will splash out through the slot and dirty the outer surfaces of the receptacle and of the centrifugal rotor as well as the inner surfaces of the frame.
  • the principal object of the present invention is to provide a centrifuge construction which overcomes the above-noted difficulties.
  • annular and substantially fiat screen rests against the radially inwardly directed part of the outer annular wall of the receptacle, this screen having its outer edge centered by a surrounding part of the frame.
  • the screen has an annular flange which extends into the receptacle and is in closely surrounding but spaced relation to the centrifugal rotor, this flange overlapping the free edge of the radially inwardly directed part of the outer wall of the receptacle.
  • a cover of the frame presses the screen against the receptacle, and thereby holds the latter against its locating seat on the frame.
  • the screen On its side which is remote from the receptacle, the screen is preferably provided with vanes and with springs which transmit the pressure of the cover to the screen.
  • a packing is preferably secured between the spout of the receptacle and the discharge line of the frame.
  • the new centrifuge has the advantage that the receptacle can be made in a simple and cheap way from two parts, a lower and an upper half, which are welded together.
  • the opening of the receptacle slot may be made relatively wide so that the receptacle interior is readily accessible for cleaning. This is possible because the radially inwardly directed outer wall of the receptacle need not extend as far radially inward toward the rotor as heretofore, since the screen, centered by the frame, rests against the receptacle and extends close to the centrifugal rotor so as to form a slight slot with it.
  • the inner annular wall of the receptacle should, on the other hand, fit closely to the centrifugal rotor, but this presents no diificulty even though the rotor axis during operation takes different positions in the frame, because there is only a very slight change in the axial position of the rotor. It is, of course, much simpler and cheaper to adjust the screen to provide a small slot around the rotor than to adjust the edge of the receptacle for this purpose.
  • the vanes on the screen have the advantage that when the rotor works as a pump and entrains air, this air is caught by the vanes which dam up the air at the slot and thereby counteract sucking action through the slot.
  • the packing in the space between the spout and the discharge line prevents sludge from passing through this space either by splashing or by sucking action.
  • FIG. 1 is a vertical sectional view of part of a centrifuge embodying the invention, the rotor being shown in elevation, and
  • FIG. 2 is a plan view of part of the screen, showing some of the vanes and one of the springs.
  • the separator there shown comprises a hollow rotor body of centrifugal bowl 1 having an axial spindle 2 mounted for rotation in a frame 3, the spindle being driven by a suitable motor (not shown).
  • the rotor 1 has peripheral nozzles 4 which, during operation, spout a liquid (generally mixed with sludge) at a high velocity into an annular stationary receptacle 5 which surrounds the rotor and is provided with a discharge spout 6.
  • the receptacle has a bottom '7, an annular inner wall 8, and an annular outer wall 9.
  • the inner wall 8 extends axially (upward) toward the rotor body 1 and terminates at its upper edge in the immediate vicinity of the rotor and at a distance radially inward from the nozzles 4.
  • the outer wall 9 extends first a distance axially upward past the nozzles and then a distance radially inward toward the rotor body above the nozzles 4.
  • the inner annular wall 8 and the radially inwardly directed part of the wall 9 form between their terminal edges an annular open slot 10, into which the rotor body with its nozzles 4 extends at least partly in order to enable the receptacle 5 to catch the jets of mate rial from the nozzles and lead this material off through the spout 6.
  • the bottom of the receptacle 7 is provided with a depending annular flange 11 having a shoulder resting on the frame 3 adjacent an annular recess 12 in the frame.
  • the flange 11 supports the receptacle on a seat 12a of the-frame in concentric relation to the rotor spindle 2.
  • this intervening space or slot is made considerably larger than would be suitable to prevent such escape, and the latter is prevented by a substantially plane annular screen 13 placed on the radially inwardly directed part of the wall 9 of the receptacle.
  • the outer periphery of the screen 13 is formed as a circle so that, by lying in contact :ith the surrounding inner annular surface of the frame 3, it is centered by this surface.
  • the inner edge of thescrcen 13 is provided with an annular downwardly directed flange 14- which overlaps the free inner edge of the wall 9 and extends to the immediate vicinity of the rotor body with which it forms the desired narrow slot.
  • This construction is simpler and cheaper than making the wall 9 in such a way that its free inner edge fits accurately and closely along the rotor body but still does not touch it.
  • the annular slot of the receptacle may be made large enough so that, with the centrifugal bowl 1 and the screen 13 removed, it is easy to insert one hand into the receptacle for cleaning its interior.
  • the vanes 15 are spaced around the screen, and each vane extends at an angle to an intersecting radius of the screen (FIG. 2).
  • a cover 17 with a flange l8 closes the upper part of the frame 3 and is held tightly to it by means of bolts (not shown).
  • the flange 13 of the cover thus presses downward against the leaf springs 16, which are also spaced around the screen and welded to it. Accordingly, through the springs 16, the screen is pressed downward against receptacle 5 so that its bottom flange 11 is held down against the frame 3. In this way, the receptacle 5 is firmly held in position but can be readily detached from the frame.
  • the frame is provided with a discharge line 19 which is firmly connected to the frame.
  • the spout 6 of the receptacle extends down into the discharge line 19 without being secured to it. The reason for this is that it is desired that, after removing the centrifugal bowl 1, the receptacle be easily detach able from the frame for cleaning the receptacle and also for cleaning the frame internally.
  • a packing 20 is provided between the spout 6 and the discharge line 19.
  • dirtying of the rotor body 1 as well as the frame 3 is prevented because the slot or space between the screen 13 and the rotor body can be made very small.
  • the dirtying is further prevented because the screen is provided with vanes 15 which darn up air in the slot.
  • the dammed-up air thus forms a barrier to sucking action through the slot between the screen and the rotor body.
  • the screen 13 cuts off the chamber 21 from sucking action from the rotor body, which works as a pump, and the packing 20 prevents entry of material from the discharge line 19 into the chamber 21.
  • a centrifugal separator having a frame and a hollow rotor rotatably mounted in the frame, the rotor being provided at its periphery with nozzle outlets for discharging a separated material from the rotor
  • the frame having a seat on which the receptacle is mounted, a substantially'flat annular screen resting on said annular outer wall of the receptacle and having an inner edge portion overlapping said free inner edge of said outer wall and forming with the rotor

Landscapes

  • Centrifugal Separators (AREA)
US724183A 1957-04-03 1958-03-26 Centrifugal separator Expired - Lifetime US3014642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE860797X 1957-04-03

Publications (1)

Publication Number Publication Date
US3014642A true US3014642A (en) 1961-12-26

Family

ID=20366814

Family Applications (1)

Application Number Title Priority Date Filing Date
US724183A Expired - Lifetime US3014642A (en) 1957-04-03 1958-03-26 Centrifugal separator

Country Status (3)

Country Link
US (1) US3014642A (de)
DE (1) DE1093732B (de)
GB (1) GB860797A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105045A (en) * 1962-01-04 1963-09-24 Sharples Corp Centrifuge discharge means
US4087924A (en) * 1976-05-08 1978-05-09 Nippon Electric Co., Ltd. Rotary-type slice dryer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US439173A (en) * 1890-10-28 Dore james vautin
US1846076A (en) * 1930-03-05 1932-02-23 Laval Separator Co De Process and apparatus for separating liquids from solids
US2047025A (en) * 1931-10-24 1936-07-07 Gilbert Co A C Humidifier
US2077813A (en) * 1934-08-14 1937-04-20 Laval Separator Co De Collecting chamber for liquids discharged from centrifugal bowls
US2690900A (en) * 1949-06-21 1954-10-05 Separator Ab Method and arrangement for homogenization of liquids
US2883054A (en) * 1955-02-04 1959-04-21 Federico G Sanchez Centrifugal separator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE511300C (de) * 1927-08-20 1930-10-29 Ludwig Altpeter Vorrichtung zum Abziehen der Fluessigkeit aus nassem, feinkoernigem Gut
FR680312A (fr) * 1928-08-21 1930-04-28 Separator Ab Perfectionnement aux séparateurs centrifuges
DE611551C (de) * 1932-11-01 1935-03-28 Ramesohl & Schmidt Akt Ges Die Schleudertrommel umschliessendes, aufklappbares Fanggehaeuse mit Stutzen fuer die anzuschliessenden Zu- und Ablaufrohrleitungen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US439173A (en) * 1890-10-28 Dore james vautin
US1846076A (en) * 1930-03-05 1932-02-23 Laval Separator Co De Process and apparatus for separating liquids from solids
US2047025A (en) * 1931-10-24 1936-07-07 Gilbert Co A C Humidifier
US2077813A (en) * 1934-08-14 1937-04-20 Laval Separator Co De Collecting chamber for liquids discharged from centrifugal bowls
US2690900A (en) * 1949-06-21 1954-10-05 Separator Ab Method and arrangement for homogenization of liquids
US2883054A (en) * 1955-02-04 1959-04-21 Federico G Sanchez Centrifugal separator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105045A (en) * 1962-01-04 1963-09-24 Sharples Corp Centrifuge discharge means
US4087924A (en) * 1976-05-08 1978-05-09 Nippon Electric Co., Ltd. Rotary-type slice dryer

Also Published As

Publication number Publication date
DE1093732B (de) 1960-11-24
GB860797A (en) 1961-02-08

Similar Documents

Publication Publication Date Title
US4623366A (en) Grid element for lid of a cannister type vacuum cleaner
US4473002A (en) Electric coffee machine with a centrifugal filter
US5784954A (en) Juice extractor
US3310243A (en) Dishwashing machine
US3319897A (en) Waste disposal unit
US3014642A (en) Centrifugal separator
US5074202A (en) Centrifuge
US20230415170A1 (en) Separator having a removable centrifuge container
US2910184A (en) Centrifugal separator
US2228822A (en) Juice extractor
US3371858A (en) Centrifuge discharge means
US2289958A (en) Juice extracting device
US2264831A (en) Washing machine
US2294468A (en) Centrifugal separator
JP3043078B2 (ja) ジューサ
US2195710A (en) Centrifugal separator
CN210697140U (zh) 一种便捷吸食果汁机
GB1602918A (en) Apparatus for cleaning floors carpets and the like
JP7357755B2 (ja) 食品加工機
GB856183A (en) A centrifuge for dewatering fine-grained material
JPS5833925Y2 (ja) ジユ−サ
JPS5823353Y2 (ja) 脱水洗濯機の糸屑除去装置
JPS628199B2 (de)
JPS596731Y2 (ja) 自動洗浄形ジユ−サ
JPS60870Y2 (ja) 洗濯機の糸屑除去装置