US2993580A - Centrifugal separators - Google Patents

Centrifugal separators Download PDF

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Publication number
US2993580A
US2993580A US689090A US68909057A US2993580A US 2993580 A US2993580 A US 2993580A US 689090 A US689090 A US 689090A US 68909057 A US68909057 A US 68909057A US 2993580 A US2993580 A US 2993580A
Authority
US
United States
Prior art keywords
pump
basket
motor
cover plate
piston
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
US689090A
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English (en)
Inventor
O'conor Frank
Edward A Daubman
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.)
American Machine and Metals Inc
Original Assignee
American Machine and Metals Inc
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 American Machine and Metals Inc filed Critical American Machine and Metals Inc
Priority to US689090A priority Critical patent/US2993580A/en
Priority to DEA30510A priority patent/DE1145557B/de
Priority to GB32268/58A priority patent/GB906268A/en
Application granted granted Critical
Publication of US2993580A publication Critical patent/US2993580A/en
Priority to NL6403675A priority patent/NL6403675A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • 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
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
    • 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
    • B04B7/06—Safety devices ; Regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/06—Fluid drive
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F49/00—Domestic spin-dryers or similar spin-dryers not suitable for industrial use
    • D06F49/003—Doors or covers; Safety arrangements

Definitions

  • a principal object of this invention is to provide a cover interlocking mechanism, effective during the accelerating and decelerating of the rotatable basket of a centrifugal separator that is driven and braked by hydraulic components in a closed hydraulic circuit.
  • Another object of the invention is to provide a cover interlock mechanism for a centrifugal separator that will require manual re-starting of the main motor each time the cover is opened.
  • One aspect of the invention may be to provide a centrifugal separator with a closed circuit hydraulic system embodying an hydraulic pump that is driven by an electric motor and wherein the hydraulic pump supplies liquid under pressure in a closed circuit to an hydraulic motor that is belted or otherwise drivingly connected to the rotatable basket of the separator.
  • a hinged cover plate may provide access to the interior of the separator and a limit switch may be provided that is connected in series with the electric motor that drives the hydraulic pump.
  • the hydraulic pump may be of the variable capacity, positive displacement type that can act as a brake for decelerating the rotatable basket of the separator.
  • An hydraulically actuated piston and cylinder mechanism may be provided for locking the cover plate during the accelerating and decelerating periods of activity of the separator.
  • This piston and cylinder mechanism may be supplied on its one end with pressure liquid through a parallel line arrangement from both sides of the closed circuit for the hydraulic pump and motor; and, on its other end with constant pressure liquid from a separate source such, for example, as from a super charger forming part of the hydraulic pump.
  • Suitable check valves may be provided in the parallel line arrangement leading to the one end of the piston and cylinder mechanism so that when one of the parallel lines is elfective to actuate the hydraulic piston mechanism, the pressure liquid will now flow into the other parallel line, and vice versa.
  • FIGURE 1 is an elevational view of a centrifugal separator to which the principles of the invention have been applied;
  • FIG. 2 is a top plan view of the separator shown in FIG. 1;
  • FIG. 3 is a schematic wiring diagram and hydraulic circuit of certain components of the invention.
  • the separator shown may include a bedplate 10 on which are mounted three equally spaced pedestals 11 that include mechanism for supporting a housing 12 for limited oscillatable movement.
  • the housing 12 may have fixed to its sides, brackets 13 that extend into the pedestals 11 to cooperate with supporting mechanism therein.
  • a basket may be located within the housing 12 and may comprise a perforated cylindrical member 14 for passing liquid therethrough, which liquid is collected within an annular chamber within the housing 12.
  • the bottom of the basket 14 may be provided with discharge passages for gravitating solids therein out through the bottom of the housing 12.
  • the basket 14 may be provided with a multiple V- belt sheave (not shown) on its vertical axis of revolution that is in driving engagement with V-belts 15.
  • the belts 15 also engage another similar sheave (not shown) on the axis of rotation of an hydraulic motor 16.
  • the motor 16 is of the constant displacement type and includes ports 17 and 18.
  • the ports 17 and 18 are connected to ports 19 and 20, respectively, of a variable volume positive displacement hydraulic pump 21 by lines 22 and 23, forming a closed hydraulic circuit.
  • the hydraulic pump 21 by means of a lever control 21' may be adjusted to deliver from zero to maximum volume of liquid to the hydraulic motor 16 and in addition may include a super charging gear pump built into thehousing of the pump 21, and adapted to deliver liquid under a predetermined substantially constant pressure through a line 24 for operating various components of the separator.
  • An electric motor 25 may be provided for driving the pump 21 at a constant speed.
  • the speed of the motor 16 during the unloading operation is 50 rpm.
  • the capacity of pump 21 may be adjusted to cause the motor 16 to rotate basket 14 at a loading speed that is substantially faster than the unloading speed; and, the pump 21 may be adjusted to cause the motor 16 to rotate basket 14 at an extracting speed that is very much faster than the unloading speed. Since the electric motor 25 rotates at a constant speed and the pump 21 cannot be reversely driven, sudden adjustment of pump 21 from an extracting speed to any lower speed will cause the motor 16 to act as a pump tending to drive the pump 21 as a motor. However, since pump 21 cannot be driven by the motor 16 acting as a pump, a braking action on the rotation of basket 14 is provided.
  • the top of the housing 12 is adapted to be covered by a top plate 26 and, a cover plate 27 of semicircular form mounted on a hinge pin 27 may cover a correspondingly shaped opening in the top plate 26 to provide access to the interior of the basket 14.
  • a normallyclosed limit switch 28 adapted to be operated by a cam 28' on the cover hinge pin 27' may be arranged so that it opens when the cover plate 27 is opened, thus preventing the starting of motor 25 when cover plate 27 is open.
  • the circuitry for the limit switch 28 will be described later.
  • an hydraulic interlock may comprise a cylinder 29 mounted on the top plate 26 of the housing 12 and may include a piston 30 having a rod 31 (FIGS. 1 and 3) extending outwardly from one end of the cylinder 29.
  • Aport 32 of the cylinder 29 may be connected by a line 33 to the line 24 that is supplied with liquid under substantially constant pressure at about p.s.i. from the built-in supercharging gear pump within pump 21.
  • the other port 34 of cylinder 29 may be connected by parallel lines 35 and 36 to lines 22 and 23, respectively.
  • the line 36 includes a check valve 37 permitting liquid flow fromline 23 to port 34 but preventing flow in the opposite direction.
  • Line 35 includes a check valve 38 that permits liquid flow from line 22 to port 34 but prevents flow in the opposite direction.
  • a needle valve 39 is provided in a line 40 leading from lines 36, 35 and port 34 to a sump 41.
  • closing start push-button switch 42 energizes relay coil 43 which closes switches 44 in lines L L and L thereby energizing motor 25, and closes a normally open holding switch 45, to hold the circuit for relay coil 43 when switch 42 is released.
  • Energization of the motor causes rotation of the pump 21.
  • the pressure in line 36 will be less than 145 psi.
  • the super charging gear pump within pump 21 causes pressure liquid to flow through lines 24 and 33 to port 32 at approximately 175 p.s.i., forcing piston leftwardly (FIG. 3) so that rod 31 is retracted from cover plate 27.
  • the cover plate 27 may be opened at will, however, so opening it opens cover limit switch 28, thereby de-energizing relay coil 43, thus causing de-energization of motor 25.
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed circuit including an hydraulic pump and motor means for rotating said basket at a plurality of different speeds; means for adjusting said pump and motor means to vary the speed at which said basket is rotated; a cover plate adapted to provide access to the interior of said separator; and interlocking means ineluding means responsive to the pressures developed on each side of the hydraulic pump and motor means for preventing the opening of said cover plate when said pump and motor means is effective to rotate said basket, as well as during periods of acceleration and deceleration; and means for exerting a substantially constant force in opposition to said pressure responsive means.
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed hydraulic circuit including an hydraulic pump and motor means for rotating as well as stopping the rotation of said basket; an electric motor for operating said pump and motor means; a cover plate adapted to provide accms to the interior of said separator; means associated with said cover plate for preventing the energizing of said electric motor when said cover plate is open; and interlocking means including means responsive to the pressures developed on each side of the hydraulic pump and motor means for preventing the opening of said cover plate when said pump and motor means is effective to rotate said basket, as well as during periods of acceleration and deceleration.
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed circuit including an hydraulic pump and motor means for rotating said basket at a plurality of different speeds; means for adjusting said pump and motor means to vary the speed at which said basket is rotated; acover plate adapted to provide access to the interior of said separator; and interlocking means including means responsive to the pressures developed on each side of the hydraulic pump and motor means for preventing the opening of said cover plate when said pump and motor means is eifective to rotate said basket,
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed circuit including an hydraulic pump and motor means for rotating said basket at a plurality of different speeds; means for adjusting said pump and motor means to vary the speed at which said basket is rotated; a cover plate adapted to provide access to the interior of said separator; interlocking means including means responsive to the pressures developed on each side of the hydraulic pump and motor means for preventing the opening of said cover plate; means for rendering said interlocking means ineflFective when said adjusting means has been operated to cause said pump and motor means to stop the rotation of said basket; and means for rendering said interlocking means efiective when said adjusting means is operated to cause said pump and motor means to rotate said basket.
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed circuit including an hydraulic pump and motor means for rotating said basket at a plurality of difierent speeds; means for adjusting said pump and motor means to vary the speed at which said basket is rotated; a cover plate adapted to provide access to the interior of said separator; an interlocking element; a piston and cylinder device mounted on the top of said housing and adapted to cause said interlocking element to be moved into and out of interlocking relation with said cover plate; means for connecting both sides of said hydraulic pump and motor means to the one end of said cylinder and piston means; and means for connecting a source of fluid at substantially a constant pressure to the other side of said piston and cylinder means.
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed circuit including an hydraulic pump and motor means for rotating said basket at a plurality of different speeds; means for adjusting said pump and motor means to vary the speed at which said basket is rotated; a cover plate adapted to provide access to the interior of said separator; an interlocking element; a piston and cylinder device mounted on the top of said housing and adapted to cause said interlocking element to be moved into and out of interlocking relation with said cover plate; means for connecting both sides of said hydraulic pump and motor means to the one end of said cylinder and piston means; means for connecting a source of fluid at substantially a constant pressure to the other side of said piston and cylinder means; and a check valve connected to each side of said pump and motor means and arranged to pass high pressure fluid away from the pump and motor means and to prevent the passage of high pressure fluid toward said pump and motor means.
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed circuit including an hydraulic pump and motor means for rotating said basket at a plurality of different speeds; means for adjusting said pump and motor means to vary the speed at which said basket is rotated; a cover plate adapted to provide access to the interior of said separator; an interlocking element; a piston and cylinder device mounted on the top of said housing and adapted to cause said interlocking element to be moved into and out of interlocking relation with said cover plate; means for connecting both sides of said hydraulic pump and motor means to the one end of said cylinder and piston means; means for connecting a source of fluid at substantially a constant pressure to the other side of said piston and cylinder means; a check valve connected to each side of said pump and motor means and arranged to pass high pressure fluid away from the pump and motor means and to prevent the passage of high pressure fluid toward said pump and motor means; and an adjustable needle valve within a line leading to a sump from the end of said piston and cylinder
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed hydraulic circuit including an hydraulic pump and motor means for rotating as well as stopping the rotation of said basket; an electric motor for operating said pump and motor means; a cover plate adapted to provide access to the interior of said separator; switch means Within the circuit for said electric motor for preventing its energizafion when said cover plate is open; and interlocking means responsive to the pressure developed on each side of the hydraulic pump and motor means for preventing the opening of said cover plate when said pump and motor means is eflective to rotate said basket, as well as during periods of acceleration and deceleration.
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed hydraulic circuit including an hydraulic pump and motor means for rotating as Well as stopping the rotation of said basket; an electric motor for operating said pump and motor means; a cover plate adapted to provide access to the interior of said separator; switch means within the circuit for said electric motor for de-energizing said electric motor when said cover plate is opened; an interlocking element; a piston and cylinder device mounted on the top of said housing and adapted to cause said interlocking element to be moved into and out of interlocking relation with said cover plate; means for connecting both sides of said hydraulic pump and motor means to the one end of said piston and cylinder means; and means for connecting a source of fluid at substantially a constant pressure to the other side of said piston and cylinder means.
  • a centrifugal separator having a substantially stationary housing within which a rotatable basket is mounted, a closed hydraulic circuit including an hydraulic pump and motor means for rotating as well as stopping the rotation of said basket; an electric motor for operating said pump and motor means; a cover plate adapted to provide access to the interior of said separator; switch means Within the circuit for said electric motor for deenergizing said electric motor when said cover plate is opened; an interlocking element; a piston and cylinder device mounted on the top of said housing and adapted to cause said interlocking element to be moved into and out of interlocking relation with said cover plate; means for connecting both sides of said hydraulic pump and motor means to the one end of said piston and cylinder means; means for connecting a source of fluid at substantially a constant pressure to the other side of said piston and cylinder means; a check valve connected to each side of said pump and motor means and arranged to pass high pressure fluid away from the pump and motor means and to prevent the passage of high pressure fluid toward said pump and motor means; and an adjustable needle valve within a line

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)
US689090A 1957-10-09 1957-10-09 Centrifugal separators Expired - Lifetime US2993580A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US689090A US2993580A (en) 1957-10-09 1957-10-09 Centrifugal separators
DEA30510A DE1145557B (de) 1957-10-09 1958-10-09 Vorrichtung zum selbsttaetigen Ausraeumen von Schleudertrommeln
GB32268/58A GB906268A (en) 1957-10-09 1958-10-09 Improvements relating to centrifugal separators
NL6403675A NL6403675A (OSRAM) 1957-10-09 1964-04-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US689090A US2993580A (en) 1957-10-09 1957-10-09 Centrifugal separators

Publications (1)

Publication Number Publication Date
US2993580A true US2993580A (en) 1961-07-25

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ID=24767001

Family Applications (1)

Application Number Title Priority Date Filing Date
US689090A Expired - Lifetime US2993580A (en) 1957-10-09 1957-10-09 Centrifugal separators

Country Status (4)

Country Link
US (1) US2993580A (OSRAM)
DE (1) DE1145557B (OSRAM)
GB (1) GB906268A (OSRAM)
NL (1) NL6403675A (OSRAM)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092576A (en) * 1959-02-18 1963-06-04 Ametek Inc Centrifugal separators
DE1295495B (de) * 1962-05-21 1969-05-14 Western States Machine Co Hydraulische Antriebsvorrichtung fuer eine Zentrifuge
US3738490A (en) * 1971-06-04 1973-06-12 Globe Union Inc Industrial-type variable-speed centrifuge
CN106076666A (zh) * 2016-06-06 2016-11-09 淮南市鸿裕工业产品设计有限公司 电动离心机安全防护组件

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE246563C (OSRAM) *
US1111001A (en) * 1913-02-20 1914-09-22 Troy Laundry Machinery Co Ltd Pneumatic-controlled lock for centrifugal-extractor covers.
DE336851C (de) * 1919-11-30 1921-05-13 Eisengiesserei Schutzvorrichtung fuer Schleudermaschinen
US1501642A (en) * 1920-07-26 1924-07-15 Henrietta C Benjamin Centrifugal extractor
US2004064A (en) * 1935-06-04 Clothes spinner
GB567515A (en) * 1943-10-18 1945-02-16 Edmund Struckman Automatic safety lock for use in connection with hydro-extractors and other machines
US2592596A (en) * 1945-08-24 1952-04-15 Wilbert L Pengelly Jet action washing machine
DE942919C (de) * 1951-03-22 1956-05-09 Fleissner & Sohn Maschinenfabr Schleuder, insbesondere Waescheschleuder
US2821840A (en) * 1952-06-17 1958-02-04 Hays David Washing machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE891980C (de) * 1953-08-20 Maschinenfabrik Buckau R. Wolf Aktiengesellschaft, Grevenbroich Selbsttätiger Ausräumer für Zentrifugen, insbesondere Zuckerzentrifugen
DE606838C (de) * 1932-06-21 1934-12-12 C G Haubold A G Grossleistungsschleuder mit Fluessigkeitssteuerung fuer den das abgeschleuderte Trockengut austragenden Schaelloeffel
DE670512C (de) * 1935-10-24 1939-01-20 Siemens Schuckertwerke Akt Ges Steuereinrichtung fuer elektrisch betriebene Schleudern, insbesondere Zuckerschleudern, mit selbsttaetiger Untenleerung
DE891080C (de) * 1950-07-23 1953-09-24 Western States Machine Co Verfahren zum satzweisen Betrieb einer Schleuder und Vorrichtung zur Durchfuehrung desselben
DE853727C (de) * 1951-01-09 1952-10-27 Eisenhuetten Entleerungsvorrichtung fuer Zentrifugen u. dgl.
DE1741191U (de) * 1956-12-07 1957-03-07 Calor Emag Elektrizitaets Ag Steuereinrichtung fuer zentrifugen.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE246563C (OSRAM) *
US2004064A (en) * 1935-06-04 Clothes spinner
US1111001A (en) * 1913-02-20 1914-09-22 Troy Laundry Machinery Co Ltd Pneumatic-controlled lock for centrifugal-extractor covers.
DE336851C (de) * 1919-11-30 1921-05-13 Eisengiesserei Schutzvorrichtung fuer Schleudermaschinen
US1501642A (en) * 1920-07-26 1924-07-15 Henrietta C Benjamin Centrifugal extractor
GB567515A (en) * 1943-10-18 1945-02-16 Edmund Struckman Automatic safety lock for use in connection with hydro-extractors and other machines
US2592596A (en) * 1945-08-24 1952-04-15 Wilbert L Pengelly Jet action washing machine
DE942919C (de) * 1951-03-22 1956-05-09 Fleissner & Sohn Maschinenfabr Schleuder, insbesondere Waescheschleuder
US2821840A (en) * 1952-06-17 1958-02-04 Hays David Washing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092576A (en) * 1959-02-18 1963-06-04 Ametek Inc Centrifugal separators
DE1295495B (de) * 1962-05-21 1969-05-14 Western States Machine Co Hydraulische Antriebsvorrichtung fuer eine Zentrifuge
US3738490A (en) * 1971-06-04 1973-06-12 Globe Union Inc Industrial-type variable-speed centrifuge
CN106076666A (zh) * 2016-06-06 2016-11-09 淮南市鸿裕工业产品设计有限公司 电动离心机安全防护组件

Also Published As

Publication number Publication date
GB906268A (en) 1962-09-19
DE1145557B (de) 1963-03-14
NL6403675A (OSRAM) 1964-06-10

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