WO2002081094B1 - A gearbox for a centrifuge, such as a decanter centrifuge - Google Patents

A gearbox for a centrifuge, such as a decanter centrifuge

Info

Publication number
WO2002081094B1
WO2002081094B1 PCT/DK2002/000224 DK0200224W WO02081094B1 WO 2002081094 B1 WO2002081094 B1 WO 2002081094B1 DK 0200224 W DK0200224 W DK 0200224W WO 02081094 B1 WO02081094 B1 WO 02081094B1
Authority
WO
WIPO (PCT)
Prior art keywords
gearbox
gear
housing
meshing
planet
Prior art date
Application number
PCT/DK2002/000224
Other languages
French (fr)
Other versions
WO2002081094A1 (en
Inventor
Jan Michelsen
Raymond John Hicks
Original Assignee
Centriquip Ltd
Jan Michelsen
Raymond John Hicks
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 Centriquip Ltd, Jan Michelsen, Raymond John Hicks filed Critical Centriquip Ltd
Publication of WO2002081094A1 publication Critical patent/WO2002081094A1/en
Publication of WO2002081094B1 publication Critical patent/WO2002081094B1/en

Links

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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B1/2016—Driving control or mechanisms; Arrangement of transmission gearing
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/72—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously
    • F16H3/724—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously using external powered electric machines

Abstract

A gearbox for a centrifuge, such as a decanter centrifuge with a rotatable bowl (1) connected to a housing (31) of the gearbox, is driven at a first speed by a first external driving means (11) and a helical conveyer (2) coaxially arranged for rotating therein at a second rotational speed. Said gearbox is comprising a three-stage epicycloidal gear train. The relative speed difference between the bowl and the conveyer is by means of the gearbox according to the invention achieved with smaller internal and external losses than hitherto known. Just by reversing the direction of the conveyer sun wheel the bowl can be brought to run faster or slower than the conveyer.

Claims

AMENDED CLAIMS[received by the International Bureau on 27 September 2002 (27.09.02); original claims 1-11 replaced by new claims 1-10 (3 pages)]
1. A gearbox for a centrifuge, such as a decanter centrifuge with a rotatable bowl (1) connected to a housing (31) of the gearbox driven at a first speed by a first external driving means (11) and a helical conveyer (2) coaxially arranged for rotating therein at a second rotational speed, wherein the gearbox is comprising a three stage epicyclic gear train, wherein two of the stages are combined to act as a double differential transmission (33) input step, the input shaft of which (15) is connected to a second external driving means (10) , the reference shaft of which (14) being connected to an external reaction member, and the output shaft of which (36; 56) being connected to the input shaft (26) of the third gearbox stage (25;55), the output reference member of the differential stage (42) being connected to the housing (31), and the input shaft (15) being connected to a first sun gear (37) meshing with a first number of planet gears (41) mounted on a first carrier (43) upon which also is mounted a second number of planet gears (42) meshing with a first ring gear (28a) fast to the housing (31) and with a second sun gear (44) on a differential reference shaft (14) .
2. A gearbox according to claim 1, wherein the gearbox is having an output stage comprising at least one planetary gear transmission (25) connected to the conveyer (2) and having a third number of planet gears (39; 40) mounted on a second joint carrier (26) with a ring gear (36) meshing with the first number of planet gears (41) mounted on the first carrier (43).
3. A gearbox according to claim 2 , wherein the third number of planet gears consists of at least one first planet gear
(39) having a first number of teeth and at least one second planet gear (40) , which has a different second number of
20 teeth and is mounted on a joint axle on the second joint carrier (26) , the first planet gear (39) meshing with a ring gear (32) fast to an output shaft (23) connected to the conveyer (2), and the second planet gear meshing with a ring gear (28b) fast to the housing (31) .
4. A gearbox according to claim 3, wherein the first numbers of teeth on the first planet gear (39) is lesser than the second number of teeth on the second planet gear (40) .
5. A gearbox according to claim 1, wherein the gearbox is having an output stage comprising a planetary gear transmission (55) having a third number of planet gears (59) mounted on a second carrier (50) fast with an output shaft (23) connected to the conveyer (2), the third number of planet gears (59) meshing with a ring gear (52) fast to the housing (31) and with a sun gear (51) fast to a ring gear (56) meshing with the first number of planet gears (41) mounted on the first carrier (43).
6. A gearbox according to each of the claims 1 - 5, wherein a centripetal pump (38) is arranged in relation to a stationary part of the decanter centrifuge inside the gear housing (319, the housing providing holding space for the lubricant in such a way as to keep the gear mesh free of the relative oil level inside the housing when the housing is rotating at its operating speed.
7. A gearbox according to claim 6, wherein the centripetal pump is able to pump oil regardless of the direction of rotation of the housing.
8. A gearbox according to each of the claims 1 - 7, wherein the differential reference shaft (14) is driven by a constant speed electric motor, said motor having at least one set of poles.
9. A gearbox according to each of the claims 1 - 7, wherein the differential reference shaft (14) is driven by an inverter controlled electric motor, said control consisting of a torque feedback circuit to enable constant filling with sediment in the centrifuge.
10. A gearbox according to each of the claims 1 - 7, wherein the differential reference shaft (14) is driven by an inverter controlled electric motor, said torque feedback being provided by a torque arm measurement on the stationary reaction member.
22
PCT/DK2002/000224 2001-04-04 2002-04-04 A gearbox for a centrifuge, such as a decanter centrifuge WO2002081094A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200100559 2001-04-04
DKPA200100559 2001-04-04

Publications (2)

Publication Number Publication Date
WO2002081094A1 WO2002081094A1 (en) 2002-10-17
WO2002081094B1 true WO2002081094B1 (en) 2002-12-12

Family

ID=8160422

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2002/000224 WO2002081094A1 (en) 2001-04-04 2002-04-04 A gearbox for a centrifuge, such as a decanter centrifuge

Country Status (1)

Country Link
WO (1) WO2002081094A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040176234A1 (en) * 2003-03-07 2004-09-09 Baker Hughes Incorporated Method for improving separation operation of centrifuges and associated improved separation designs
WO2004097255A2 (en) * 2003-05-02 2004-11-11 Incentra Limited Gearbox, and centrifuge incorporating same
DE102006028804A1 (en) * 2006-06-23 2007-12-27 Westfalia Separator Ag Slug centrifuge with drive device
JP5147726B2 (en) * 2006-12-26 2013-02-20 巴工業株式会社 Gear box for centrifuge
DE102008015134A1 (en) * 2008-03-20 2009-10-01 Gea Westfalia Separator Gmbh Gear arrangement for a centrifuge
JP5858546B2 (en) * 2010-09-13 2016-02-10 ヒラー・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Screw centrifuge drive device
DE102011108008A1 (en) * 2011-07-19 2013-01-24 Harry Gaus decanter centrifuge
CN104888974B (en) * 2015-06-19 2019-04-30 宁波榕大环保装备有限公司 Vertical continuous discharge sedimentation centrifuge
WO2022261327A1 (en) * 2021-06-11 2022-12-15 Irwin Robert Willard Variable electric transmission system and method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343786A (en) * 1964-02-21 1967-09-26 Pennsalt Chemicals Corp Centrifuge having plural conveying means for solids
DK503384A (en) 1984-10-22 1986-03-24 Alfa Laval Separation As DECANTER CENTER WITH MECHANICAL GEAR BETWEEN DRUM AND TRANSPORT SEAL
JPS61197062A (en) * 1985-02-28 1986-09-01 Takashi Takahashi Differential speed increasing gear of centrifugal separator
GB2239924B (en) 1990-01-08 1993-06-30 Alfa Laval Sharples Ltd Centrifuge gearboxes
US5203762A (en) 1990-12-20 1993-04-20 Alfa-Laval Separation, Inc. Variable frequency centrifuge control
DE4310158C1 (en) * 1993-03-29 1994-12-22 Braren Cyclo Getriebe Orbital gearbox with two output shafts
DE9409109U1 (en) * 1994-06-03 1995-09-28 Flottweg Gmbh Centrifuge with stepless control of the differential speed between the drum and broaching tool
FR2746675B1 (en) * 1996-03-29 1998-05-07 Guinard Centrifugation REDEX MODULE CENTRIFUGAL DECANTER

Also Published As

Publication number Publication date
WO2002081094A1 (en) 2002-10-17

Similar Documents

Publication Publication Date Title
KR900001637B1 (en) Continuously-variable transmission
IL158583A0 (en) Differential electric engine with variable torque conversion
US6059685A (en) Coaxial traction drive automatic transmission for automotive vehicles
US5692989A (en) Self aligning planetary gear transmission & speed reducer
RU2005133449A (en) TRANSMISSION SYSTEM WITH DIVISION OF POWER FLOW WITH FOUR TAPES
SE9403711D0 (en) Reversible power wrench
CN107580662B (en) Transmission for a motor vehicle and hybrid drive train having such a transmission
CA2198582A1 (en) Variable speed power transmission apparatus
EP1541895A3 (en) Variable ratio drive system
CN110730879A (en) Drive device for a motor vehicle
US20210231199A1 (en) Multi-speed planetary transmission for a vehicle with at least one electric machine
WO2002081094B1 (en) A gearbox for a centrifuge, such as a decanter centrifuge
CN113561748A (en) Electric drive axle system
AU2001229008A1 (en) Range gearbox
CN215826461U (en) Double-motor external electric drive bridge structure
GB2239924A (en) Double epicyclic gear transmission
RU2311573C2 (en) Planetary reduction gear
US3763718A (en) Hydromechanical transmission
RU2168080C2 (en) Speed gear-box
KR100240691B1 (en) Method for setting a spiral direction of the planetary type transmission of an Electric Vehicle
KR910000176B1 (en) Variable-speed drive
US20030232679A1 (en) Bi-powered clutchless variable speed transmission
CN115264011A (en) Power transmission device and automobile comprising same
CN114060479A (en) Transmission mechanism
RU2104428C1 (en) Power gear train

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ CZ DE DE DK DK DM DZ EC EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: B1

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ CZ DE DE DK DK DM DZ EC EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: B1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP