Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
  • B02C15/006—Ring or disc drive gear arrangement

Definitions

• Known mill drive systems comprise one or more Ge ⁇ gear stages to the drive power conversion of an electric motor. Gear stages and electric motor thereby form a closely related to a processing process within eg a bowl ⁇ mill, a mixing drum, a crusher, a tube mill or a rotary kiln drive train, which is exposed to considerable repercussions of the processing process.
• bevel gear stages are used to connect the electric motor to the drive train.
• a drive device for a vertical crusher which is driven either via a sprocket on a rotatable bottom disc or a multi-stage bevel gear. Due to a lack ⁇ adjustability at an output stage of the drive Device shock loads are transferred from the processing process in the drive device, in particular in the toothing.
• WO 2008/031694 A1 discloses a mill drive system with a gear which can be arranged below a grinding plate.
• the transmission comprises at least one planetary stage and has a vertical shaft position.
• an electric motor is integrated, which is connected to a lubricant supply circuit of the transmission, whose rotor and stator have vertically extending axes and whose cooling is carried out by means of circulating through the gear lubricant.
• a spur gear with one or more gear stages to drive a space enclosed by a ring gear work machine which comprises a transmission stage receiving the gear housing and a valve disposed on an output shaft of an output stage, einstellbe ⁇ of movable pinion which meshes with the ring gear
• the gear housing consists of a first rigid Ge ⁇ housing part and a second rigid housing part.
• the ERS ⁇ te casing part encloses the output stage with the output drive shaft and the einstellbeweglichen ⁇ pinion and the transmission has superior side walls which rest on the foundation.
• the second housing part is out of contact with the foundation at one end face on the first housing part BE ⁇ solidifies.
• a mill drive system with an integrated motor-gear unit which has a lichensa ⁇ men cooling circuit.
• the motor-gear unit is supported on a bottom plate of a housing comprising the motor-gear unit.
• a mill drive system is described having a grinding plate which can be arranged below a transmission with at least a ⁇ planetary and / or spur gear and a built in a housing of the transmission electric motor.
• the mill drive system comprises a converter with an associated control device for non-interlocking speed control of the motor.
• the present invention is therefore an object of the invention to provide a geared motor for a mill drive system, on the one hand to avoid transmission damage caused by short breaks in the drive train and on the other hand, a reduction of bending forces from a grinding process.
• the geared motor according to the invention comprises a Ge ⁇ gear can be arranged below a Mahltellers or laterally of a grinding drum with at least one planetary gear, which has a verti ⁇ kale or horizontal shaft position.
• an electric motor is integrated in a housing of the transmission, which is connected to a lubricant supply circuit of the transmission.
• Rotor and stator of the motor have axes extending parallel to the shaft position of the gearbox.
• a cooling of the engine by means of circulating through the Ge ⁇ gear lubricant.
• a lubricating oil-tight casing for rotor or stator windings of the motor to seal against within the housing provided circulating lubricant.
• the mill drive system comprises a converter with an associated control device for the non-interlocking speed control of the motor.
• a ring gear of the at least one planetary gear is radially surrounded by both the rotor and the stator. Rotor and stator are preferably arranged concentrically to the ring gear.
• the engine may be designed, for example, as an external rotor.
• the ring gear forms a stator.
• Entspre ⁇ accordingly a further embodiment of the present invention is a sun gear, at least one planet gear stage is connected with a rotor carrier.
• the rotor carrier In the rotor carrier, at least one axially extending opening for a
• Lubricant drain from the gearbox be provided in a lubricant collection area or container.
• the motor can also be designed as an internal rotor.
• the ring gear is preferably rotationally fixedly connected to the rotor before ⁇ .
• seals are provided only on a driven plate, on lubricant supply lines, on electrical power supply leads and on at least one feed for a measuring device. This allows a further reduction of mechanical components and thus contributes to increased reliability.
• the motor is a permanently excited synchronous machine whose rotor magnet system is enclosed in a stainless steel jacket. Since the rotor does not thermi ⁇ rule losses in this way, no rotor cooling is required.
• the motor can also be designed as a squirrel cage machine. The present invention will be explained in more detail below on a ⁇ exporting approximately example with reference to the drawing. The figure shows a mill drive system with a geared motor according to the invention in a sectional view.
• the mill drive system shown in the figure comprises a arranged below a Mahltellers gear 1 with two planetary stages. Both the drive-side planetary stage and the output-side planetary stage have a vertical Wel ⁇ lenlage. Both planetary stages each include a ring gear, a planetary carrier with planetary gears mounted therein, and a sun gear. The ring gears of the planetary stages are fixedly connected to a transmission housing 11. The planet carrier of the driven-side planetary stage can be connected to the grinding table and mounted by means of a thrust bearing 13. The sun gear of the drive-side planetary stage is connected to a rotor shaft 28 of an electric motor 2 integrated into the transmission housing 11, which rotor comprises a rotor 21 and a stator 22 surrounding it radially. Rotor 21 and stator 22 have vertically extending axes.
• the ring gear 14 of the drive-side planetary gear stage is surrounded both radially by the rotor 21 and by the stator 22. Rotor 21 and stator 22 are arranged concentrically to the ring gear 14 of the input-side planetary gear.
• the motor 2 is implemented as outer ⁇ runner.
• the ring gear 14 of the drive-side planetary wheel stage forms a stator carrier.
• the rotor shaft 28 or a sun gear shaft of the drive-side planetary gear stage is connected to a rotor carrier 27 on which the rotor 21 is supported.
• the motor 2 could in principle also be designed as an internal rotor.
• the ring gear 14 of the drive-side planetary gear can be rotatably connected to the rotor 21.
• the rotor shaft 28 is supported by a arranged between the engine 2 and Ge ⁇ gear 1 Radial bearing 24, one below the motor 2 arranged in a lubricant sump 12 radial bearing 25 as well as of a likewise below the motor 2 angeord ⁇ Neten thrust bearing 26th In this way, with a relatively short rotor shaft 28, a very good centering of the rotor 21 is possible.
• Rotor shaft 28 and sun gear of the drive ⁇ side planetary stage are preferably connected via a below or above the motor 2 arranged coupling.
• the planet carrier of the drive-side planetary stage and the sun gear of the output-side planetary stage are interconnected.
• the engine 2 is connected to a lubricant supply circuit of the transmission 1, wherein the lubricant from the
• Lubricant sump 12 is pumped to lubrication points in the transmission 1 and runs from there via the engine 2 in the lubricant sump 12. In this way, a cooling of the
• a lubricating oil-tight Ummante ⁇ development of a stator lamination packet which includes windings of the stator 22.
• a significant increase of the air gap of the Mo ⁇ tors 2 is not required since it only runs ER- low magnification by the oil ⁇ tight sheaths.
• the motor 2 is in the present embodiment, a permanent-magnet synchronous machine whose rotor magnet system is welded in a stainless steel sheath. This allows particularly low electrical losses.
• the mill drive system shown in the figure further comprises a converter 23 with an associated control device for non-interlocking speed control of the motor 2, so that there is no play between the tooth flanks of the transmission 1 in the direction of rotation.
• Mechanical natural frequencies of a mill gearbox motor system become uncritical when using the inverter 23 due to system component decoupling. Tooth flanks of the transmission 1 are held by connecting a minimum torque under constant force ⁇ circuit. As a result, direction-changing loads on the tooth flanks are largely prevented.

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• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Retarders (AREA)
• General Details Of Gearings (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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Citations (5)

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• 2010
  • 2010-11-29 ES ES10015077.0T patent/ES2444437T3/es active Active
  • 2010-11-29 DK DK10015077.0T patent/DK2457663T3/en active
  • 2010-11-29 PL PL10015077T patent/PL2457663T3/pl unknown
  • 2010-11-29 EP EP10015077.0A patent/EP2457663B1/de active Active
• 2011
  • 2011-10-31 BR BR112013013077A patent/BR112013013077A2/pt not_active IP Right Cessation
  • 2011-10-31 WO PCT/EP2011/069091 patent/WO2012072351A1/de active Application Filing
  • 2011-10-31 RU RU2013129755/13A patent/RU2538394C1/ru not_active IP Right Cessation
  • 2011-11-28 CN CN201120480952XU patent/CN202634175U/zh not_active Expired - Lifetime

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