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
  • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
  • B02C17/18—Details
  • B02C17/24—Driving mechanisms
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
  • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators

Definitions

• the present invention relates to the field of gearless drives of tube mills. It relates to a stator core for receiving stator windings for a gearless drive a tube mill.
• Tube mills are used for grinding ores, in particular copper ores. Also other ground material such case ⁇ play cement products is ground in tube mills.
• a mill body of a tube mill is aligned with a rotational axis transverse to a gravitational field and is offset by a drive in a rotational movement about the axis of rotation.
• a gearless drive for carrying out the rotary movement is often present in large tube mills.
• a rotor of the gearless drive is mounted directly on the mill body.
• a stator is arranged outside around the rotor.
• the stator which typically has a diameter of 6 to 15 meters, includes a stator core and stator frame ei ⁇ NEN.
• the stator core is divided into stator core pieces, which can also be referred to as stator core parts.
• Typical for a gearless drive are between 2 and 6 stator core pieces.
• the Sta ⁇ torkern accommodates stator windings.
• the stator core is connected to a foundation via the outer stator frame and mechanically fixed in position. For operational safety, the rigidity of the stator must be so be big as possible vibration problems to vermei ⁇ .
• stator core pieces are connected only to the stator frame so that a connection between the stator core pieces takes place only indirectly via the stator frame.
• stator core makes only a small contribution to the rigidity of the stator, since this is divided. In this case, especially the stator frame determines the rigidity of the stator. As a result, an increased cost of materials in the stator frame and consequently also in the stator is necessary.
• Object of the present invention is to provide a stator with sufficient rigidity with reduced material costs for a gearless drive a tube mill available, the stator is a stator core, which is divided into stator core pieces, and ei ⁇ nem radially outside the stator core Sta arranged ⁇ gate frame has.
• Subject of the invention is to connect the stator core in the rotational direction of the tube mill to each other so that a force or a moment directly, that is to say is inde pendent of ⁇ a stator frame, transferable. Due to the resulting increased rigidity of the stator core, it is possible with the same stiffness of the stator to reduce the cost of materials of the stator frame and the materi ⁇ alaufwand of the stator.
• the connection direction is defined by the position of the stator core pieces to ⁇ each other and is not necessarily identical to the direction in which the connection can absorb forces.
• the stator core be ⁇ makes a positive connection between two of the stator core. This means that between the two stator core pieces any form of undercut so that partial contours of the two stator core pieces mesh and occur under load the connection surface pressures on the part contours. As a result, the stator core pieces are subjected to pressure.
• a further advantageous embodiment relates to a bolt, pin or rivet connection such as a screw connection between two of the stator core pieces, so as to allow a release of the connection.
• This also includes using an additional element, such as a tab or clip.
• a further advantageous embodiment relates to a toothing such as a serration between two of the stator core pieces.
• the toothing also includes round partial contours. The teeth allow easy connection.
• a further advantageous embodiment relates to a dovetail connection between two of the stator core pieces.
• a further advantageous embodiment relates to a material-locking connection between two of the stator core such as a welded, soldered or Klebeverbin ⁇ dung. This minimizes the occurrence of notch effects in the connection.
• a further advantageous embodiment relates to a frictionally engaged connection, which may also be referred to as a frictional connection, such as a clamped press connection.
• a frictionally engaged connection such as a clamped press connection.
• overloads of the connection are very well tolerated, as a non-destructive slipping in case of overload is possible.
• a further advantageous embodiment relates to a positive connection between two of the Statorkernstü ⁇ bridge, in which additionally a frictional engagement occurs.
• the ⁇ se combination of positive engagement and frictional engagement has both a high static and dynamic load capacity.
• a further advantageous embodiment relates to a prestressed serration between two of the stator core pieces, which is biased by a traction element such as a rope, a wire or a belt. This connection is very easy to manufacture.
• the invention will be explained in more detail with reference to Patsbei ⁇ play in connection with the figures.
• the figures each show a radial section transverse to a rotation axis of a tube mill through a stator core, the stator core being subdivided into four stator core pieces, which are characterized by:
• Fig. 1 shows a stator core in a radial section.
• the stator core is circular and divided into four stator core pieces 1.
• the stator core is at least partially made of egg ⁇ nem magnetizable material such as steel and adapted to receive the stator windings, which are not shown in FIG. 1.
• the stator core 1 wei ⁇ sen respectively at a first end a notch-shaped deepen Fung and at a second end of a notch-shaped projection.
• the notch-shaped recesses and projections have an identical part contour so that, for a circular arrangement of the stator core pieces 1 each form a recess of a Statorkern fermentes 1 and a projection of an adjacent Statorkern thoroughlyes notch-shaped contact ⁇ levels and forms a serration.
• 3 Radially outside the circular arrangement of the stator core pieces 1 there is a cable 2, which clamps the stator core pieces 1 in tension with each other. The result is a ge ⁇ connected circular ring with high rigidity.
• the circular design of the stator core can be performed alter ⁇ natively by other geometries.
• the only restriction of freedom of design is a quasi-rotationally symmetrical shape of the stator core in order to ermögli ⁇ chen a smooth rotation of a mill body.
• the number of stator core pieces can be varied as desired. It is further also possible Sta ⁇ torkern technicallye with only pits or pre jumps provided at each of both ends of the stator core so that ⁇ piert a respective recess in a protrusion in the circular arrangement of the stator core. It is also possible to use other partial contours for the toothing, in particular with several depressions or projections at one end.
• stator core pieces It is only necessary to ensure that an undercut of the stator core pieces is guaranteed.
• the tensioning of the stator core pieces can also take place in the tangential direction by other tension elements, such as a wire, a belt or screws. These traction elements may also be present in the stator core pieces or radially within the circular arrangement of the stator core pieces.
• Fig. 2 shows stator core pieces 1 with straight ends so that arise in a circular arrangement of the stator core 1 contact surfaces in the radial direction.
• tabs 4 are positioned in the region of the contact surfaces so that the tabs 4 overlap in the tangential direction with the respective stator core pieces 1 of a contact surface and are connected to these stator core pieces 1 by screws 5 in the radial direction.
• stator core pieces with bevelled ends. It is also possible that the stator core pieces do not touch but form a gap. It can be dispensed with a tab if the Sta ⁇ torkern GmbHen themselves overlap with each other or the screwed connection takes place in the tangential direction. The screw connections in the radial and tangential direction can be prestressed and thus lead to an additional frictional engagement.

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Power Engineering (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Crushing And Grinding (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Publications (1)

Family

ID=44148332

Family Applications (2)

Family Applications Before (1)

Country Status (12)

Families Citing this family (2)

Family Cites Families (9)

• 2011
  • 2011-02-10 EP EP11154075A patent/EP2486983A1/fr not_active Withdrawn
• 2012
  • 2012-02-06 PE PE2013001844A patent/PE20141728A1/es not_active Application Discontinuation
  • 2012-02-06 EP EP12703292.8A patent/EP2673091A1/fr not_active Withdrawn
  • 2012-02-06 WO PCT/EP2012/051913 patent/WO2012107374A1/fr active Application Filing
  • 2012-02-06 MX MX2013009213A patent/MX2013009213A/es not_active Application Discontinuation
  • 2012-02-06 BR BR112013020525-3A patent/BR112013020525A2/pt not_active IP Right Cessation
  • 2012-02-06 CA CA2826670A patent/CA2826670A1/fr not_active Abandoned
  • 2012-02-06 AU AU2012215538A patent/AU2012215538A1/en not_active Abandoned
  • 2012-02-06 CN CN2012800085579A patent/CN103347614A/zh active Pending
• 2013
  • 2013-08-08 ZA ZA2013/05991A patent/ZA201305991B/en unknown
  • 2013-08-08 CO CO13188662A patent/CO6781558A2/es not_active Application Discontinuation
  • 2013-08-08 CL CL2013002310A patent/CL2013002310A1/es unknown
  • 2013-08-12 US US13/964,634 patent/US20130328437A1/en not_active Abandoned

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events