EP0448737B1 - Stülpfilterzentrifuge - Google Patents

Stülpfilterzentrifuge Download PDF

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Publication number
EP0448737B1
EP0448737B1 EP90105624A EP90105624A EP0448737B1 EP 0448737 B1 EP0448737 B1 EP 0448737B1 EP 90105624 A EP90105624 A EP 90105624A EP 90105624 A EP90105624 A EP 90105624A EP 0448737 B1 EP0448737 B1 EP 0448737B1
Authority
EP
European Patent Office
Prior art keywords
drum
speed
screw spindle
nut
hollow shaft
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
EP90105624A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0448737A1 (de
Inventor
Hans Gerteis
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.)
Heinkel Industriezentrifugen GmbH and Co
Original Assignee
Heinkel Industriezentrifugen GmbH and Co
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
Priority to EP90105624A priority Critical patent/EP0448737B1/de
Application filed by Heinkel Industriezentrifugen GmbH and Co filed Critical Heinkel Industriezentrifugen GmbH and Co
Priority to ES90105624T priority patent/ES2063850T3/es
Priority to DK90105624.2T priority patent/DK0448737T3/da
Priority to DE59007695T priority patent/DE59007695D1/de
Priority to AT90105624T priority patent/ATE113866T1/de
Priority to US07/838,815 priority patent/US5286378A/en
Priority to PCT/EP1991/000047 priority patent/WO1991014507A1/de
Priority to KR1019920701278A priority patent/KR0179342B1/ko
Priority to JP50253691A priority patent/JP3281372B2/ja
Priority to SU915053196A priority patent/RU2067501C1/ru
Priority to CN91101700A priority patent/CN1023448C/zh
Publication of EP0448737A1 publication Critical patent/EP0448737A1/de
Application granted granted Critical
Publication of EP0448737B1 publication Critical patent/EP0448737B1/de
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
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
    • B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges
    • B04B3/025—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges with a reversible filtering device
    • 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
    • B04B9/10—Control of the drive; Speed regulating

Definitions

  • the invention relates to an inverting filter centrifuge with a drum rotatably mounted in a housing, having radial filtrate passages, with a reversible filter cloth covering the filtrate passages, with a cover closing the end face of the drum, with a filling opening provided on the cover for suspension to be filtered, with a the filling tube penetrating the filling pipe, and with a safety device which prevents the drum from opening by detaching the cover from it as long as the drum rotates at a speed greater than a critical speed above which opening the drum would be associated with danger, drum and cover are axially displaceable relative to each other by means of a rotatably driven hollow shaft and a telescoping carrier shaft therein, in order to turn the filter cloth inside out.
  • a centrifugal governor is provided in the known centrifuge, which ensures that that the opening movement of the drum can only be initiated below a certain drum speed.
  • a centrifugal governor is a complicated and fault-prone machine part, which as such also makes the entire inverting filter centrifuge prone to failure.
  • a screw spindle is arranged on the carrier shaft and a nut engaged with this screw spindle is provided, and that either the screw spindle or the nut can be driven in rotation by a motor, so that depending on the speed of the screw spindle or nut relative to the speed of the hollow shaft and drum, the carrier shaft back and forth telescoped in the hollow shaft, the drum opening when the speed of the screw spindle or nut driven by the electric motor is greater than the speed of the hollow shaft, and closing when the Speed of the screw spindle or nut is less than the speed of the hollow shaft, and that the maximum speed of the motor is selected so that the maximum speed given by it to the screw spindle or nut is less than the critical speed of the drum, so that the drum only opens when it rotates at a speed less than d The critical speed rotates.
  • a filter centrifuge of a different type and with a different task is known.
  • an inner housing enclosing the filter drum 6 can be moved up and down coaxially to the drum for the purpose of sediment discharge within a stationary outer housing 1, but is nonetheless held non-rotatably.
  • the up and down movement takes place by means of a threaded section 16 of a drive shaft 5 which drives the drum via a clutch 18 which can be overrun.
  • the drive shaft provided with the threaded section is stopped, the drum rotates relative to the stationary drive shaft due to its inertia due to the overrunable coupling.
  • the inverting filter centrifuge shown in the drawing comprises a schematically indicated housing 1 which tightly encloses the entire machine, in which a hollow shaft 3 is rotatably mounted in bearings 4, 5 on a stationary machine frame 2. With the end of the hollow shaft 3 protruding beyond the bearing 5, a drive wheel 6 is connected in a rotationally fixed manner, via which the hollow shaft 3 can be put into rapid rotation by an electric or other motor 7 by means of a V-belt.
  • the hollow shaft 3, which is rigidly continuous between the bearings 4, 5, has an axially running keyway, indicated in dashed lines, in which a wedge piece 8 is axially displaceable.
  • This Wedge piece 8 is rigidly connected to a carrier shaft 9 which is displaceable inside the hollow shaft 3.
  • the carrier shaft 9 therefore rotates together with the hollow shaft 3, but is axially displaceable in the latter.
  • the closed bottom of a pot-shaped centrifugal drum 11 is flange-mounted on the end of the hollow shaft 3, which is on the left in FIGS. 1 and 2 and projects beyond the bearing 4.
  • the drum 11 has radially extending through openings 12 on its cylindrical jacket.
  • the drum 11 is open on its end face opposite the floor.
  • On the flange-like opening edge 13 surrounding this open end face the edge of an essentially circular-cylindrical filter cloth 15 is tightly clamped by means of a retaining ring 14.
  • the other edge of the filter cloth 15 is in a corresponding manner tightly connected to a base piece 16 which is rigidly connected to the displaceable, displaceable carrier shaft 9 which freely penetrates the bottom of the centrifugal drum 11.
  • a centrifugal chamber cover 18 is rigidly fastened to the base piece 16 by means of stud bolts 17, leaving a space free, which tightly closes the centrifugal space of the drum 11 by resting on its opening edge in FIG. 1 and in FIG. 2 together with the base part 16 by axially pushing out the carrier shaft 9 the hollow shaft 3 is lifted freely from the drum 11.
  • a filling tube 19 is arranged on the left side of the inverting filter centrifuge in FIGS. 1 and 2, which serves to supply a suspension to be broken down into its solid and liquid components into the centrifugal chamber of the drum 11 (FIG. 1) and in the operating state shown in FIG. 2 in a bore 21 of the displaceable carrier shaft 9 penetrates.
  • the drive device which mediates the displacement of the carrier shaft 9 in the hollow shaft 3 and thus the opening and closing of the centrifugal drum and thus the transition between the two operating states shown in FIGS. 1 and 2 will be described in detail later.
  • the inverting filter centrifuge initially assumes the position shown in FIG. 1.
  • the displaceable carrier shaft 9 is retracted into the hollow shaft 3, as a result of which the bottom piece 16 connected to the carrier shaft 9 lies in the vicinity of the bottom of the centrifugal drum 11.
  • the centrifugal chamber cover 16 has placed itself tightly on the opening edge of the drum 11.
  • suspension to be filtered is introduced via the filling tube 19.
  • the liquid constituents of the suspension pass through the openings 12 of the drum in the direction of the arrows 22 and are passed from a baffle plate 23 into a discharge line 24.
  • the solid particles of the suspension are stopped by the filter cloth 15.
  • the carrier shaft 9 With the centrifugal drum 11 still rotating, the carrier shaft 9 is now shifted (to the left) according to FIG. 2, as a result of which the filter cloth 15 is turned inside out and the solid particles adhering to it are thrown outwards in the direction of the arrows 25 into the housing 1. From there they can be easily removed.
  • the filling tube 19 In the position according to FIG. 2, the filling tube 19 has penetrated into the bore 21 of the carrier shaft 9 through corresponding openings in the cover 18 and in the base piece 16.
  • a bushing 31 which has an axially extending slot 32, is flanged rigidly and non-rotatably to the end of the hollow shaft 3 supported by the bearing 5.
  • a nut 33 With the rear end of the support shaft 9, a nut 33 is rigidly connected to a radially projecting wedge piece 30 which engages in the keyway 32, so that the wedge piece 30 provides a rotationally fixed connection between the nut 33 and the support shaft 9 on the one hand and the bushing 31 and the hollow shaft 3 on the other hand, however, the nut 33 and thus the carrier shaft 9 are axially displaceable in the bush 31.
  • a screw spindle 34 with a corresponding external thread engages in the internal thread of the nut 33 and is connected to a sleeve 36 in a rotationally fixed but axially displaceable manner via a conventional parallel key connection 35.
  • the sleeve 36 is in turn rotatably supported by means of bearings 37, 38 in an end piece 45 fixedly flanged to the bushing 31.
  • a washer 41 is held on the rear end of the screw spindle 34 projecting beyond the sleeve 36 by means of a nut 39.
  • a plate spring 42 or the like is arranged, which the screw spindle 34 relative to the sleeve 36 (in 3 biases to the right), wherein the aforementioned key connection 35 between the screw spindle 34 and the sleeve 36 enables a slight axial movement between the screw spindle 34 and the sleeve 36.
  • the plate spring 42 which prestresses the screw spindle 34 and thus also the carrier shaft 9 (to the right in FIG. 3) via the nut 33, has the purpose, in the working phase of centrifuging (FIG. 1), of the cover 18 against hydraulic pressure occurring inside the drum to hold fixed system at the opening edge of the centrifugal drum 11.
  • the screw spindle 34 could also be rotatably mounted directly in the bearings 37 and 38, ie without the interposition of the sleeve 36. In this case, the pulley 43 would sit directly on the screw spindle 34 and the plate spring 42 used for the purpose mentioned would be omitted.
  • the bush 31 is rotatably supported by means of the end piece 45 flanged to it in its own rotary bearing 46, which in turn is supported by a stand 47 on the machine frame 2, so that the drive forces exerted by the pulley 43 and the motor 44 in the vicinity of the bearing 46 can be collected.
  • the relative speed of these parts, in particular the carrier shaft 9, and the screw spindle 34 and, above all, whether the screw spindle 34 is driven at a lower or greater speed than the carrier shaft 9 is important.
  • carrier shaft 9 and screw spindle 34 there is no axial displacement of the carrier shaft 9 in the hollow shaft 3.
  • the carrier shaft 9 and screw spindle 34 rotate simultaneously and in the same direction in the embodiment shown, and when an axial displacement of the carrier shaft 9 in the hollow shaft 3 is triggered, only the difference in speed between these parts 9 and 34 in a positive and negative sense is important, even with a relatively large one absolute speed of the screw spindle 34 causes only a relatively small axial stroke of the carrier shaft 9.
  • the screw spindle 34 behaves like a screw with a very small pitch (fine thread), which in turn means that only small forces are required to drive it, and thus the motor 44 driving the screw spindle 34 can be designed to be relatively weak, and indeed also when the carrier shaft 9 and screw spindle 34 are driven in opposite directions.
  • the screw spindle closure arrangement described thus acts like a screw screw (provided with a fine thread) with self-locking, which does not require an additional radial locking.
  • FIG. 3 shows the opening state of the centrifugal drum corresponding to FIG. 2, in which case the carrier shaft 9 is displaced completely to the left by the screw spindle 34 in FIG.
  • the carrier shaft 9 has a cavity 48 in front of the nut 3 connected to it, into which the screw spindle 34 enters when the carrier shaft (to the right in FIG. 3) is retrieved during the closing movement of the centrifugal drum, the nut 33 in which a rearward extension of the hollow shaft 3 forming socket 31 moves accordingly.
  • the screw spindle can be a spindle without self-locking, which can be realized, for example, by a conventional ball screw.
  • the locking force required for the safe locking of the centrifugal drum 11 is applied by the constantly switched on motor 44, which drives the screw spindle 34 at a lower speed than the electric motor 7, the hollow shaft 3 and thus the carrier shaft 9.
  • FIG. 4 shows a further modified embodiment of the invention.
  • parts which correspond to one another are designated by the same reference symbols as in FIGS. 1 to 3.
  • the screw spindle 34 is driven in rotation via the pulley 43 and the motor 44 in order to displace the carrier shaft 9 in the hollow shaft 3
  • the screw spindle 34 is connected to the carrier shaft 9 in a rotationally fixed manner, and the sleeve 36 designed as a nut has an internal thread that engages with the external thread of the screw spindle 34.
  • the sleeve 36 is axially immovable in the end piece 45 and is rotated via the pulley 43 and the motor 44, so that the screw 34 and with it the carrier shaft 9 are pushed axially back and forth, whereby the centrifugal chamber cover 18 is already in the opens or closes as described.
  • the screw 34 is axially slidably mounted in a part 33 via a key 35, which in turn is firmly connected to the carrier shaft 9.
  • the screw spindle 34 is connected in a rotationally fixed manner to the carrier shaft 9, but can move axially relative to it over a limited distance.
  • the washer 41 is held by the nut 39, on which one end of the plate spring 42 is supported.
  • the other end of the plate spring 42 lies in the cavity 48 of the carrier shaft 9 on an inner shoulder 49 or the like, so that the plate spring 42, just as in the embodiment according to FIG. 3, strives to pretension the carrier shaft 9 in such a way that in the working phase of centrifuging ( Figure 1) the centrifugal chamber cover 18 is held in fixed contact with the opening edge of the centrifugal drum 11.
  • FIG. 4 represents, as it were, a "kinematic reversal" compared to the embodiment according to FIG. 3. With regard to their function and advantages, both versions correspond to one another.
  • the screw spindle 34 driving motor is designed so that it has a fixed, maximum speed, which can never be exceeded.
  • Such motors are known per se.
  • This maximum speed of the motor 44 in particular the electric motor 44, is chosen so that - taking into account a gear (pulley 43) provided between the motor 44 and the screw spindle 34 or sleeve 36 with a corresponding step-up or step-down - the speed of the screw spindle 34 is always less than is a critical speed of the drum 11, above which the drum must not be opened, because otherwise the inverting filter centrifuge could be destroyed.
  • the motor 44 is preferably designed such that its rotational speed can be regulated in the region below its maximum speed. The opening and closing speed of the drum 11 can thus be increased or decreased.
  • a controllable manual transmission can be arranged between the electric motor 44 and the screw spindle 34 in a manner known per se in order to control the rotational speed of the motor 44 below its maximum speed and thus the rotational speed of the screw spindle 34 accordingly.
  • lower speed used here than the critical speed of the drum 11 also means a speed that is negative, that is to say opposite to the direction of rotation of the drum 11.

Landscapes

  • Centrifugal Separators (AREA)
EP90105624A 1990-03-24 1990-03-24 Stülpfilterzentrifuge Expired - Lifetime EP0448737B1 (de)

Priority Applications (11)

Application Number Priority Date Filing Date Title
ES90105624T ES2063850T3 (es) 1990-03-24 1990-03-24 Centrifugadora filtrante reversible.
DK90105624.2T DK0448737T3 (da) 1990-03-24 1990-03-24 Reversibel centrifuge med filter
DE59007695T DE59007695D1 (de) 1990-03-24 1990-03-24 Stülpfilterzentrifuge.
AT90105624T ATE113866T1 (de) 1990-03-24 1990-03-24 Stülpfilterzentrifuge.
EP90105624A EP0448737B1 (de) 1990-03-24 1990-03-24 Stülpfilterzentrifuge
PCT/EP1991/000047 WO1991014507A1 (de) 1990-03-24 1991-01-15 Stülpfilterzentrifuge
US07/838,815 US5286378A (en) 1990-03-24 1991-01-15 Sleeve filter centrifuge
KR1019920701278A KR0179342B1 (ko) 1990-03-24 1991-01-15 슬리브 필터 원심 분리기
JP50253691A JP3281372B2 (ja) 1990-03-24 1991-01-15 フィルタ反転式遠心分離機
SU915053196A RU2067501C1 (ru) 1990-03-24 1991-01-15 Фильтрующая центрифуга с выворачиваемым фильтром
CN91101700A CN1023448C (zh) 1990-03-24 1991-03-20 翻口过滤器式离心机

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90105624A EP0448737B1 (de) 1990-03-24 1990-03-24 Stülpfilterzentrifuge

Publications (2)

Publication Number Publication Date
EP0448737A1 EP0448737A1 (de) 1991-10-02
EP0448737B1 true EP0448737B1 (de) 1994-11-09

Family

ID=8203808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105624A Expired - Lifetime EP0448737B1 (de) 1990-03-24 1990-03-24 Stülpfilterzentrifuge

Country Status (11)

Country Link
US (1) US5286378A (da)
EP (1) EP0448737B1 (da)
JP (1) JP3281372B2 (da)
KR (1) KR0179342B1 (da)
CN (1) CN1023448C (da)
AT (1) ATE113866T1 (da)
DE (1) DE59007695D1 (da)
DK (1) DK0448737T3 (da)
ES (1) ES2063850T3 (da)
RU (1) RU2067501C1 (da)
WO (1) WO1991014507A1 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105327787A (zh) * 2015-10-21 2016-02-17 苏州盛天力离心机制造有限公司 上部卸料离心机的自动出料装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992019381A1 (de) * 1991-05-04 1992-11-12 Heinkel Industriezentrifugen Gmbh & Co. Stülpfilter-zentrifuge
DE4337620C1 (de) * 1993-11-04 1995-03-09 Krauss Maffei Ag Stülpfilterzentrifuge (Trommeldeckel-Verriegelung)
DE10115381A1 (de) * 2001-03-28 2002-10-24 Heinkel Ag Stülpfilterzentrifuge
US7063371B2 (en) * 2004-03-12 2006-06-20 Asc Incorporated Convertible hardtop roof
US9816282B2 (en) * 2013-08-16 2017-11-14 Robert Stanley Chick Self cleaning swimming pool filter
CN105107646B (zh) * 2015-09-15 2017-12-22 张家港市中南化工机械有限公司 一种翻袋离心机
AU2018224318B2 (en) 2017-02-27 2024-06-20 Translate Bio, Inc. Methods for purification of messenger RNA
WO2022072836A2 (en) 2020-10-01 2022-04-07 Translate Bio, Inc. Methods for purification of messenger rna
CN114873897B (zh) * 2022-05-25 2024-04-12 邓瑞亮 污水处理用防止污泥堵塞的分离设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2709894C3 (de) * 1977-03-08 1982-01-07 Heinkel Industriezentrifugen GmbH & Co, 7120 Bietigheim-Bissingen Diskontinuierliche Filterzentrifuge
DE2710624C2 (de) * 1977-03-11 1985-09-19 Heinkel Industriezentrifugen GmbH + Co, 7120 Bietigheim-Bissingen Stülpfilterzentrifuge
DE3315898A1 (de) * 1983-05-02 1984-11-08 Seitz Enzinger Noll Maschinenbau Ag, 6800 Mannheim Anschwemmfiltrationsgeraet
DE3520134C2 (de) * 1985-06-05 1994-02-24 Heinkel Ind Zentrifugen Stülpfilter-Zentrifuge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105327787A (zh) * 2015-10-21 2016-02-17 苏州盛天力离心机制造有限公司 上部卸料离心机的自动出料装置

Also Published As

Publication number Publication date
WO1991014507A1 (de) 1991-10-03
KR0179342B1 (ko) 1999-03-20
EP0448737A1 (de) 1991-10-02
DE59007695D1 (de) 1994-12-15
CN1055128A (zh) 1991-10-09
DK0448737T3 (da) 1994-12-12
CN1023448C (zh) 1994-01-12
ATE113866T1 (de) 1994-11-15
JPH05504909A (ja) 1993-07-29
KR920703209A (ko) 1992-12-17
US5286378A (en) 1994-02-15
ES2063850T3 (es) 1995-01-16
RU2067501C1 (ru) 1996-10-10
JP3281372B2 (ja) 2002-05-13

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