EP2699355A2 - Centrifuge and method for monitoring a torque - Google Patents
Centrifuge and method for monitoring a torqueInfo
- Publication number
- EP2699355A2 EP2699355A2 EP12715967.1A EP12715967A EP2699355A2 EP 2699355 A2 EP2699355 A2 EP 2699355A2 EP 12715967 A EP12715967 A EP 12715967A EP 2699355 A2 EP2699355 A2 EP 2699355A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifuge
- torque
- input shaft
- transmission input
- overload
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 title claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 33
- 230000008859 change Effects 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 5
- 238000005352 clarification Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
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
- B04B3/04—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 a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
-
- 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
-
- 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
- B04B9/08—Arrangement or disposition of transmission gearing ; Couplings; Brakes
-
- 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
- B04B2001/2025—Driving control or mechanisms; Arrangement of transmission gearing with drive comprising a planetary gear
Definitions
- the invention relates to a centrifuge according to the preamble of claim 1 and a method for monitoring a torque.
- Decanters are known which are used to process drilling mud.
- a decanter When processing such a sludge, also called drilling mud, a decanter is usually operated at a lower load than when processing other products.
- One reason for this is that in the event of a failure due to overloading, a costly disassembly and cleaning of the decanter must take place.
- DE 10 2006 028 804 A1 discloses a generic centrifuge with a drum and a worm, which are driven by a first motor and preferably a second motor, wherein a gear arrangement is arranged between the motors and the drum and the worm, which has a plurality of gear stages, wherein at four shafts torques are introduced into the first and the second gear stage and wherein a first and a second gear stage are driven at least three shafts.
- the arrangement is used inter alia. for generating a differential speed between the drum and screw.
- an unregulated drive is realized in DE 10 2006 028 804 A1, in which a transmission input shaft is held. In this context, the possibility is described to realize a torque overload protection on the fixed shaft.
- DE 94 09 109 U1 discloses a centrifuge with two combined to a superposition gearbox epicyclic gear stages.
- an input of the epicyclic gear stages is held and determined at this input a signal in response to the torque at the screw.
- This signal can be used for monitoring, overload indication and / or attenuation measures
- the FR 81 1 1 786 discloses a solid bowl screw centrifuge with a torque overload protection device having a lever which is held by intermediate elements on a boom of a transmission input shaft. A lever end is held between two rollers, which are connected via a Doppelgelenkarm with a spring support. The lever, if the centrifuge is in operation, presses against one of the two rollers, which is connected to a connected to a meter. This measuring device determines the force exerted by the lever force and outputs when a predetermined limit value is exceeded, a control command to a control device of the centrifuge, which stops the feed of product into the centrifuge. If the overload is too high, the double articulated arm may buckle, releasing the lever from the rollers. Thus, the transmission input shaft of the centrifuge is no longer fixed or released.
- the object of the invention is to provide a centrifuge which makes it possible to process the product drilling mud in a particularly suitable manner.
- the Matterlasthebelarm advantageously serves as a torque arm, which dissolves in the overload case of the transmission input shaft or the rotatably connected part such as an arm or a disc.
- normal operation means that the torque acting on the overload lever arm is less than a predetermined first limit value, and if this first limit value is exceeded, first of all operating parameters are changed in a suitable manner Limit value for the torque is exceeded, the solid bowl centrifuge is turned off and moves to a safe state.
- the Matterlasthebelarm is preferably formed as a cylinder / piston assembly, which is designed in particular a fluidic - pneumatic or hydraulic - telescopically resilient or has a mechanical spring element such as a coil spring.
- the centrifuge has means for determining the instantaneous torque load on the cylinder / piston unit. These means can determine, for example, the change in length of the overload lever arm and / or determines the relative or absolute change in the tilt angle of the piston rod to a starting position. This information can be used to assess which operating state is currently present.
- Torque with the specification of a first and a second limit the percentage of a case of overload occurring can be surprisingly reduced.
- FIG. 1 shows a sectional, schematic representation of a solid bowl screw centrifuge
- Figure 2 is a front view of a solid bowl screw centrifuge;
- Figure 3 is a detail view of a Uberlasthebels of Fig. 2 and
- Figures 1 to 3 show a solid bowl screw centrifuge with a rotatable drum 1 with preferably horizontal axis of rotation D and disposed within the drum 1, also rotatable screw 2, which has a centrifuge drive 3 for rotating drum 1 and screw 2.
- the drum is between see a drive-side and a drive-facing drum bearings 4a, 4b arranged.
- the centrifuge drive 3 has a motor 5 and a gear arrangement arranged between the motor 5 and the drum 1 and the worm 2.
- the gear arrangement comprises, for example, a single gear, a so-called planetary gear 6, with three or more gear stages 7, 8, 9, which are connected downstream of the motor 5, wherein in the embodiment chosen here, the first two gear stages 7, 8 and the third gear stage 9 on the two axial sides of the drive-side drum bearing 4a are arranged.
- Alternative embodiments e.g. with all gear stages 7, 8, 9 inside or outside of the drum bearing 4a (relative to the drum 1) are also feasible.
- the design of the transmission 6 is such that between the rotational speed of the drum 1 and the speed of the screw 2 during operation, a differential speed is adjustable.
- the first gear stage 7 and the second gear stage 8 of the gear 6 are each planetary gear-like formed, wherein the first gear stage 7 forms a kind of precursor and the second gear 8 forms a kind of main stage, both of which are arranged in a common housing 12.
- the first and the second gear stage 7, 8 are designed like a circulating gear, wherein the housing 12 is driven with, which in turn drives the drum 1, which is rotatably connected to the housing 12 preferably via a hollow shaft 13.
- the first gear stage 7 has a sun gear 14 on a sun gear shaft 15, planet wheels 16 on planetary gear shafts 17, which are combined to form a planet carrier 33, and an outer ring gear 18.
- the second gear 8 also has - also within the housing 12 - a sun gear 19 on a transmission input shaft 20, also known as sun gear, planetary gears 21 on Planetenradachsen 22 which are combined to form a planet carrier 40, and an outer ring gear 23.
- the motor 5 drives directly (not shown) or indirectly (via a first belt transmission 24 with a pulley 25 on its motor shaft 26, a belt 27 and a pulley 28, non-rotatably with the housing 12 and the Planetenradachsen 17 of the planet gears 16 of The first gear stage 7 is coupled so that it also forms the planet carrier 33 here), the housing 12 and the planetary gears 16.
- the pulley 28 may also be integrally formed with the housing 12 or formed on the outer circumference.
- the first motor 5 directly or indirectly (for example via a second belt drive 29 with a pulley 30 on its motor shaft 26, a belt 31 and a pulley 32) drives the (hollow) shaft 15 for the sun gear 14 of the first gear stage 7th
- the ring gear 18 is also rotatably coupled via an intermediate piece with a ring gear 23 of the second gear 8 to an intermediate shaft 39 or designed in one piece with this.
- the Planetenradachsen 22 of the planetary gears 21 of the second gear 12 drive via the Planetenradzan 40 an intermediate shaft 41 to the third gear stage 9, which (as a single or turn multiple output gear stage) drives the screw 2 (indicated only schematically here).
- the transmission input shaft 20 is set to zero in the present embodiment. This arrangement may also be referred to as zero point drive.
- the speed of the intermediate shaft 39 is determined by the speed of the sun gear 15 of the sun gear 14 of the first gear 7 and thus is also dependent on the output speed of the (drum) motor 5.
- Both the sun gear 15 and the housing 1 2 have a different speed from zero, wherein the rotational speed of the housing 12 is fixedly coupled to the rotational speed of the sun gear 15. It is also advantageous that the two first gear stages 7, 8 are arranged within the common (rotatable) housing 12, since this is cost-effective and compact.
- the first gear 7 forms a kind of precursor, which acts with the second gear stage 8 as a kind of primary primary gear stage.
- the two first gear stages 7, 8 can also be arranged completely together (possibly with further stages) between the drive-side drum bearing 4a and the drum 1 or be arranged relative to the drum 1 outside the drive-side drum bearing 4a.
- An advantage of the constructions is to mention that the dependence of the differential speed on the slip and the load state of the decanter is low. By changing the belts or pulleys, the predetermined differential speed range can be easily adjusted.
- the differential rotational speed can be preselected by replacing the belt pulley of the belt drive, wherein during operation within the ranges by regulating or controlling the engine 5, the differential speed can be varied within the given bandwidths.
- the transmission input shaft 20 has in FIGS. 1 and 2 a disk 46 at its free end.
- a Matterlasthebelarm 47 is supported outside the axis of rotation D.
- This Matterlasthebelarm 47 may be formed in different ways and prevented in its function as a torque arm rotational movement of the transmission input shaft 20.
- the Kochlasthebelarm 47 in a preferred embodiment as a cylinder / piston unit or as a compression spring with a cylinder housing 49 and a linearly movable piston rod 50th educated.
- a force is exerted in the manner of a restoring force, in particular a spring force or a pressure by a fluid, such. a gas or a liquid. Acts a force on the piston rod 50, so this moves relative to the cylinder housing 49th
- the overload lever arm is, for example, a pneumatic cylinder which opposes a restoring force by a gas pressure to the force which transmits the worm via the disc to the pneumatic lever.
- the Matterlasthebelarm exercises during operation of the centrifuge a restoring force against the rotational direction R of the drum 1 and the screw 2 and holds the transmission input shaft 20 at rest with this force.
- the force acting on the Matterlasthebelarm by the transmission input shaft measured by a load cell 51, which is set on Studentslasthebelarm 47.
- the measurement can be carried out in various ways, such as by measuring the change in length of the mutually movable elements of Matterlasthebelarmes or by measuring the angle of the lever arm to the ground or frame to which it is fixed.
- a pneumatic cylinder gas spring
- various control commands can be issued.
- the feed of product into the centrifuge can be throttled or completely stopped.
- the load cell 51 outputs a signal, which is passed on to a computing unit 52 and is adjusted with a limit value or limit value.
- the load cell 51 is arranged in the present example in a compact manner directly on Automated Device 47 or integrated into this.
- the overload lever arm 47 has a receptacle 53, here for example a metal clip, which presses against a coupling means 54, preferably a bolt of the disk 46 and thus keeps the transmission input shaft 20 at a standstill.
- a coupling means 54 preferably a bolt of the disk 46
- the force is measured which acts on the overload lever arm and determines the torque therefrom. If the solid bowl screw centrifuge is in normal operation, the drilling mud is clarified. This clarification is carried out by supplying drilling mud into the centrifuge. In the centrifuge field of the centrifuge, the drilling mud is converted into liquid phase and a solid phase, which are removed by various processes from the centrifuge.
- the overload lever arm remains in its original position, although operating parameters are changed.
- the inlet is switched off and thus creates a safe state.
- the piston rod 50 has at its end a receptacle 53 which is rigidly connected to the piston rod 50 or end formed on the piston rod 50.
- the receptacle may preferably be formed in the form of a groove 58 with a shoulder 59 for guiding the bolt 54.
- the pin 54 of the disc 46 is located in the groove 58 of the receptacle 53.
- the disc 46 exerts a force in the direction of rotation R of the drum 2 on the pin 54 during operation of the centrifuge.
- the disc 46 is decoupled from the Gölasthebelarm 47 and moves in the direction of rotation R.
- the bolt 54 dissolves during the rotational movement of the coving 58 of the receptacle 53, which for decoupling the disc 46 and the associated screw 2 leads.
- the Matterlasthebelarm is pivotally mounted about the pivot pin 55 of a tilting joint 61. By decoupling the transmission input shaft 20 is free and rotates with.
- the present invention has the advantage that only when reaching the third limit, so in case of failure, an emergency stop and thus cleaning the screw and a renewed decoupled Matterlasthebelarms is necessary.
- the force measurement or the determination of the torque and the matched operating parameters, such as. the drive power of the engine 6 reaches an optimal utilization of the centrifuge.
- vibrations or resonant vibrations may occur. These can be damped by damping feet 56 and damping plates 57, so that the centrifuge transmits no vibrations to a machine frame 60 or the ground.
- the operation of the centrifuge may additionally be adjusted and monitored by means for detecting vibrations 62, for example a vibration sensor.
Landscapes
- Centrifugal Separators (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011002126A DE102011002126A1 (en) | 2011-04-18 | 2011-04-18 | Centrifuge and method for monitoring torque |
PCT/EP2012/056976 WO2012143342A2 (en) | 2011-04-18 | 2012-04-17 | Centrifuge and method for monitoring a torque |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2699355A2 true EP2699355A2 (en) | 2014-02-26 |
EP2699355B1 EP2699355B1 (en) | 2020-03-18 |
Family
ID=45998334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12715967.1A Active EP2699355B1 (en) | 2011-04-18 | 2012-04-17 | Centrifuge and method for monitoring a torque |
Country Status (8)
Country | Link |
---|---|
US (1) | US9855565B2 (en) |
EP (1) | EP2699355B1 (en) |
BR (1) | BR112013026647B1 (en) |
CA (1) | CA2833426C (en) |
DE (1) | DE102011002126A1 (en) |
MX (1) | MX338692B (en) |
RU (1) | RU2581372C2 (en) |
WO (1) | WO2012143342A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011002126A1 (en) * | 2011-04-18 | 2012-10-18 | Gea Mechanical Equipment Gmbh | Centrifuge and method for monitoring torque |
CN103801463B (en) * | 2013-12-30 | 2016-06-29 | 山东联重机械有限公司 | A kind of horizontal screen sedimentation centrifuge |
CN105013628A (en) * | 2015-06-25 | 2015-11-04 | 王海燕 | Drilling mud sand-gravel separator |
USD893741S1 (en) * | 2017-08-30 | 2020-08-18 | Gea Mechanical Equipment Gmbh | Housing for a centrifuge |
RU2756225C1 (en) * | 2020-07-16 | 2021-09-28 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Красноярский государственный аграрный университет" | Scroll centrifuge drive |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU902835A1 (en) * | 1980-06-27 | 1982-02-07 | Научно-производственное объединение по крахмалопродуктам | Sedimentation-type centrifugal apparatus |
US4334647A (en) * | 1980-12-03 | 1982-06-15 | Bird Machine Company, Inc. | Centrifuges |
FR2507798B1 (en) | 1981-06-11 | 1985-05-31 | Robatel Slpi | TORQUE LIMITING DEVICE FOR A ROTARY TANK MACHINE AND AN INTERNAL CONVEYOR SCREW |
DK0376919T3 (en) * | 1988-12-30 | 1997-04-28 | Flottweg Gmbh | Decanter centrifuge with anti-vibration component |
DE9409109U1 (en) | 1994-06-03 | 1995-09-28 | Flottweg Gmbh, 84137 Vilsbiburg | Centrifuge with stepless control of the differential speed between the drum and broaching tool |
WO1997020634A1 (en) * | 1995-12-01 | 1997-06-12 | Baker Hughes Incorporated | Method and apparatus for controlling and monitoring continuous feed centrifuge |
US8172740B2 (en) * | 2002-11-06 | 2012-05-08 | National Oilwell Varco L.P. | Controlled centrifuge systems |
DE102006028804A1 (en) | 2006-06-23 | 2007-12-27 | Westfalia Separator Ag | Slug centrifuge with drive device |
DE102009023555A1 (en) * | 2009-05-30 | 2010-12-02 | Gea Westfalia Separator Gmbh | Method for determining the torque of a worm of a decanter |
DE102011002126A1 (en) * | 2011-04-18 | 2012-10-18 | Gea Mechanical Equipment Gmbh | Centrifuge and method for monitoring torque |
US20140235420A1 (en) * | 2014-04-28 | 2014-08-21 | HilFlo, LLC | Control system for a decanter centrifuge |
-
2011
- 2011-04-18 DE DE102011002126A patent/DE102011002126A1/en not_active Withdrawn
-
2012
- 2012-04-17 US US14/112,286 patent/US9855565B2/en active Active
- 2012-04-17 CA CA2833426A patent/CA2833426C/en active Active
- 2012-04-17 BR BR112013026647-3A patent/BR112013026647B1/en active IP Right Grant
- 2012-04-17 WO PCT/EP2012/056976 patent/WO2012143342A2/en active Application Filing
- 2012-04-17 MX MX2013012109A patent/MX338692B/en active IP Right Grant
- 2012-04-17 RU RU2013150334/05A patent/RU2581372C2/en active
- 2012-04-17 EP EP12715967.1A patent/EP2699355B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012143342A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012143342A3 (en) | 2012-12-20 |
RU2013150334A (en) | 2015-05-27 |
DE102011002126A1 (en) | 2012-10-18 |
BR112013026647B1 (en) | 2020-10-27 |
RU2581372C2 (en) | 2016-04-20 |
US9855565B2 (en) | 2018-01-02 |
BR112013026647A2 (en) | 2016-12-27 |
WO2012143342A2 (en) | 2012-10-26 |
US20140315706A1 (en) | 2014-10-23 |
CA2833426A1 (en) | 2012-10-26 |
MX338692B (en) | 2016-04-27 |
EP2699355B1 (en) | 2020-03-18 |
CA2833426C (en) | 2019-01-15 |
MX2013012109A (en) | 2014-01-24 |
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