US2953250A - Centrifuges - Google Patents

Centrifuges Download PDF

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Publication number
US2953250A
US2953250A US622128A US62212856A US2953250A US 2953250 A US2953250 A US 2953250A US 622128 A US622128 A US 622128A US 62212856 A US62212856 A US 62212856A US 2953250 A US2953250 A US 2953250A
Authority
US
United States
Prior art keywords
scraper
shaft
drum
centrifuge
arm
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
US622128A
Other languages
English (en)
Inventor
Jung Erland Viktor
Monteus Sven Hilding
Andersson Nils Vilhelm
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.)
Landsverk AB
Original Assignee
Landsverk 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 Landsverk AB filed Critical Landsverk AB
Application granted granted Critical
Publication of US2953250A publication Critical patent/US2953250A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof

Definitions

  • the present invention has for its object by a suitable construction of the scraper and itsmotion kmechanism to vimprove the modeof operation of fthe scraper and to facilitatecomplete removal yof the remaining material in a manner to spare the strainer 'screen-on ythe inside of the centrifuge
  • Fig. l is a vertical view of the contrivance together with adjacent parts of the centrifuge.
  • Fig. 2 is a cross section Ialong a horizontal plane a-a in Fig. l.
  • Fig. 3 is a vertical view of the scraper proper, and
  • Fig. 4 is a horizontal view of the same.
  • the centrifuge drum 1 is mounted with its shaft 2 and the driving motor 3 in a frame consisting substantially of a girder system 5 arranged on legs 4.
  • the cylindrical jacket of the drum is perforated and provided with a strainer screen 6 on the inside thereof. It is covered by a cap 7, which is provided with an opening for the scraper.
  • the drum is surrounded by a cylindrical mantle 8, which is likewise provided with a cap 9.
  • the caps 7 and 9 are omitted in the plan View shown in Fig. 2.
  • the sugar juice escapes through the strainer screen and the jacket of the drum to a non-illustrated collecting receptacle arranged beside the mantle 8, whereas the remaining solid sugar mass forms a cylindrical body 10 on the inside of the strainer
  • the removal of this material is effected by means of a blade-like scraper 11, which is secured to the lower end of a shaft 13 parallelling the centrifuge shaft.
  • the shaft 13 is ⁇ rotatably and displaceably mounted in a concentric guide sleeve 14, which is secured to the girder system 5 as well as to a bracket 15 extending from the leg 4.
  • the upper end 16 of the shaft 13 is threaded and guided in a sleeve 17.
  • the shaft 13 is adapted to be raised and lowered by means of a motion transmitting contrivance built into a hous- Acal Vportion of the arm 'strainer 16 maybe accurately a vertical edge 30, which is operative during the-:outward swinging movement 'of the scraper toward ithe finside of the centrifuge drum,
  • guide pin l24 Arranged on the'non-threadedportion'of vtheshaft 13is guide pin l24 provided with a roller engaging ya guide slot 25vin zthe sleeve '14, said guide lslot vcomprising -a ⁇ spiral-shaped portion 2.6 and a straight portion connected thereto.
  • the scraper 11 consists of a sheet-metal member having an outwardly flange intended to force the 11 is ypivotally connected to the vertical outer end of the arm 12 ⁇ by means of a leaf spring .27, which is welded on the one -side thereof to '.the lscraper while being secured on the other side thereof to the arm by means of screws 28.
  • the spring normally tends to keep the scraper in the position lshown by full lines in Fig. '4.
  • the working pressure of the scraper will shift the latter -into the position shown by broken vlines inFig.
  • the :motor 19 is yautomatically brought into operation, to commence with at a relatively low number of revolutions, the shaft 13 being screwed downwardly thereat and the scraper performing rst a swinging movement, while the guide pin 24 moves in the guide slot 26 from the position A into the position B, wherein the guide pin is at the upper end of the straight portion of the guide slot.
  • the scraper will then have moved from the position A1 into the position B1 shown by broken lines. During this movement the scraper will have cut out an annular groove in the upper e-nd of the material cylinder 10 and will have removed a corresponding quantity of the material.
  • the circuit of the motor 19 is switched by means of the contact 21, so that the motor will rotate at a considerably higher number of revolutions.
  • the shaft 13 is nguided by means of the pin 24 in the straight portion of the slot 25, the shaft being thus displaced downwardly in its longitudinal direction without being turned.
  • the remaining portion o-f the material cylinder is scraped olf during the movement of the scraper from the position B1 into the bottom position C1, the guide pin 24 having thus reached the position C.
  • the contact 22 is actuated, and the motor circuit is interrupted while a time relay is switched in at the same time.
  • the scraper will thereby be swung about the axis of the shaft 13 over an angle, which is obviously comparatively small, the scraper will be lremoved from the strainer screen, but which is sufficient to move the outer end of the scraper out of contact with the strainer screen, whereby damage of the strainer screen is prevented.
  • This is made possible by the fact ythat the rocking shaft 13 of the'scraper is located in front of the radial plane extending through the axis of rotation of the centrifuge and the contact point of the scraper on 4 the inside of the drum, counted in the rotational direction of the drum.
  • the rocking shaft 13 of the scraper and the swinging axis determined by the leaf spring will thus be located on opposite sides of said radial plane.
  • the rocking shaft 13 is preferably located inside the jacket of the centrifuge drum but may possibly be disposed outside the same, provided that the scraper carrying arm 12 is extended suiciently in the vertical direction.
  • a centrifugal separator comprising a centrifuge drum mounted on a vertical driving shaft, a fixed guide member, a Vertical scraper shaft movable in s'aid guide member, ⁇ a laterally-projecting arm secured to the lower end of the scraper shaft, a blade-like scraper disposed to remove solid material from said drum, said scraper being swingably connected at one end to the outer end of said arm and being ⁇ acted upon by a spring to allow the free end of the scraper to be swung outwards against the action of the spring, a stop member on said arm for limiting the outward swinging motion of the scraper relatively to said arm, a driving mechanism for displacing the scraper shaft longitudinally, and means for rocking the scraper shaft and swinging the scraper to land from the inside of the centrifuge drum ⁇ and for guiding the scraper along the inside of the drum', said scraper shaft and said spring being disposed on opposite sides of the radial plane extending through the yaxis of rotation of

Landscapes

  • Centrifugal Separators (AREA)
  • Treatment Of Fiber Materials (AREA)
US622128A 1956-07-06 1956-11-14 Centrifuges Expired - Lifetime US2953250A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE792217X 1956-07-06

Publications (1)

Publication Number Publication Date
US2953250A true US2953250A (en) 1960-09-20

Family

ID=20339699

Family Applications (1)

Application Number Title Priority Date Filing Date
US622128A Expired - Lifetime US2953250A (en) 1956-07-06 1956-11-14 Centrifuges

Country Status (5)

Country Link
US (1) US2953250A (enrdf_load_stackoverflow)
BE (1) BE549988A (enrdf_load_stackoverflow)
DE (1) DE1075048B (enrdf_load_stackoverflow)
FR (1) FR1155359A (enrdf_load_stackoverflow)
GB (1) GB792217A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156939A (en) * 1960-06-30 1964-11-17 Hepworth Machine Company Inc Composite plow construction
US3309015A (en) * 1963-07-31 1967-03-14 Jung Erland Viktor Centrifuges
US5316685A (en) * 1992-07-30 1994-05-31 Grana, Inc. Method and apparatus for separating solids from liquid containing same
US5460717A (en) * 1992-10-20 1995-10-24 Thomas Broadbent & Sons Limited Particle separation and drying apparatus
US6632166B2 (en) * 2000-08-04 2003-10-14 Robert B. Carr Centrifuge having axially movable scraping assembly for automatic removal of solids
US20140256528A1 (en) * 2011-11-24 2014-09-11 Bma Braunschweigische Maschinenbauanstalt Ag Discontinuous centrifuge with a scraper for scraping a product

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154401B (de) * 1959-05-22 1963-09-12 Joseph Rousselet Zentrifuge mit lotrechter Trommelwelle und Entleerung durch den Trommelboden
SE393936B (sv) * 1976-08-12 1977-05-31 Weibull Nils Ab Ingenjorsfirma Lasanordning for automatskrapa till centrifuger

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1102530A (en) * 1914-01-22 1914-07-07 S S Hepworth Company Centrifugal-machine unloader.
US1431016A (en) * 1919-05-13 1922-10-03 S S Hepworth Company Centrifugal-machine discharger
US2467023A (en) * 1945-07-04 1949-04-12 Fletcher Works Inc Centrifugal drier and plow therefor
US2667974A (en) * 1949-06-14 1954-02-02 Western States Machine Co Heavy cyclical centrifugal machine
US2755991A (en) * 1952-08-08 1956-07-24 American Tool & Machine Compan Discharger shoe apparatus for centrifugal separator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2685968A (en) * 1954-08-10 Hertrich
US1388173A (en) * 1920-08-23 1921-08-23 Daniels Edmund Discharger for sugar-centrifugals
BE349605A (enrdf_load_stackoverflow) * 1927-03-12
US2064766A (en) * 1935-07-22 1936-12-15 Western States Machine Co Centrifugal discharger
NL104374C (enrdf_load_stackoverflow) * 1949-06-14 1900-01-01
BE500833A (enrdf_load_stackoverflow) * 1950-01-26

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1102530A (en) * 1914-01-22 1914-07-07 S S Hepworth Company Centrifugal-machine unloader.
US1431016A (en) * 1919-05-13 1922-10-03 S S Hepworth Company Centrifugal-machine discharger
US2467023A (en) * 1945-07-04 1949-04-12 Fletcher Works Inc Centrifugal drier and plow therefor
US2667974A (en) * 1949-06-14 1954-02-02 Western States Machine Co Heavy cyclical centrifugal machine
US2755991A (en) * 1952-08-08 1956-07-24 American Tool & Machine Compan Discharger shoe apparatus for centrifugal separator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156939A (en) * 1960-06-30 1964-11-17 Hepworth Machine Company Inc Composite plow construction
US3309015A (en) * 1963-07-31 1967-03-14 Jung Erland Viktor Centrifuges
US5316685A (en) * 1992-07-30 1994-05-31 Grana, Inc. Method and apparatus for separating solids from liquid containing same
US5460717A (en) * 1992-10-20 1995-10-24 Thomas Broadbent & Sons Limited Particle separation and drying apparatus
US6632166B2 (en) * 2000-08-04 2003-10-14 Robert B. Carr Centrifuge having axially movable scraping assembly for automatic removal of solids
US20140256528A1 (en) * 2011-11-24 2014-09-11 Bma Braunschweigische Maschinenbauanstalt Ag Discontinuous centrifuge with a scraper for scraping a product
US9764337B2 (en) * 2011-11-24 2017-09-19 Bma Braunschweigische Maschinenbauanstalt Ag Discontinuous centrifuge with a scraper for scraping a product

Also Published As

Publication number Publication date
BE549988A (enrdf_load_stackoverflow)
FR1155359A (fr) 1958-04-25
DE1075048B (de) 1960-02-04
GB792217A (en) 1958-03-19

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