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
  • B02C15/003—Shape or construction of discs or rings
• • 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

• the invention relates to a grinding bowl, in particular for vertical mills, with an inner, continuous cavity opening, with at least one substantially horizontal division into a lower base module and an upper ring-shaped grinding bowl module fastened thereon.
• grinding bowls were usually made in one piece from cast material. Due to constant demands for ever larger vertical mills and thus larger grinding bowls for an increase in throughput of the vertical mills, occur in the cement production and usually somewhat remote production sites for cement problems in the production and transport of these ever-increasing grinding bowls. For example, mills are in use, which have a diameter of 7.9 m in the upper part of the grinding bowl and a diameter of 4.8 m at the grinding bowl neck.
• the diameter at the foundation base of larger vertical mills with corresponding grinding bowls are in the meantime in the range of about 14 m to 18 m. Therefore, if the required grinding bowls are made in one piece, it is on the one hand only dependent on a few manufacturing companies for this size of grinding bowls.
• the invention is therefore based on the invention to design such grinding bowls with increasing diameter so that the problems mentioned above can be overcome and in particular to provide greater flexibility in terms of production technology with simultaneously improved transportability and relatively simple installation at the plant location.
• a central idea of the invention is to design and construct the previously one-piece grinding bowl as a multi-part grinding bowl. It should be noted, however, that the high forces and loads to be absorbed by the multi-part grinding bowl can be qualitatively absorbed and transmitted in the same way as in the case of an integrally designed grinding bowl.
• the lower base module is produced as a one-piece annular bowl module. This, in particular, to be able to initiate the grinding forces acting on the grinding bowl during operation over the entire circumference in the output flange of the required transmission.
• the upper grinding bowl module is made from at least two ring segments, which in this case can be referred to as half shells, these ring segments being connected in particular non-positively or positively to a rigid upper ring.
• this upper rigid ring with its lower annular surface on the upper annular surface of the one-piece lower annular shell module.
• the attachment is also here primarily non-positively, which can also also include positive-locking element.
• one and the same material or different materials with the same or similar material characteristic values or - behavior chosen as the material for the parts of the grinding bowl preferably one and the same material or different materials with the same or similar material characteristic values or - behavior chosen as the material for the parts of the grinding bowl.
• an identical casting material can be selected as the material for the parts of the grinding bowl. The load and temperature properties can be better and more accurately tuned.
• the at least two ring segments or shells are provided at their vertical end surfaces with complementary connecting surfaces with the one or more adjacent ring segments.
• these connecting surfaces are substantially perpendicular. However, in certain embodiments, they may also be inclined or stepped to achieve better and safer power transfer in the upper rigid ring itself.
• the connecting surfaces in the outer region are provided on one or both sides radially with projecting connecting flanges, so that at least one frictional attachment of the individual ring segments to the rigid ring can be realized by means of bolted connections through these flanges.
• the connecting surfaces preferably have a T-shaped or tilted by 90 ° H-shape, so that the cantilevered areas can be used as a mounting flange with an adjacent other ring segment.
• connection between the lower, one-piece annular shell module and the upper ring segments is preferably realized non-positively via single or multi-row bolt connections.
• positively locking means in particular guide pins or tongue and groove devices made of metal.
• the positive-locking means can also be used alone, if appropriate.
• the lower annular surface is realized as a planar bearing ring.
• the grinding bowl can also by means of the lower Ring surface on a bearing, such as a plain bearing, stand.
• the drive can be arranged, for example, outside, below and / or inside the grinding bowl.
• Fig. 1 is a front perspective view of an assembled three-piece grinding bowl
• FIG. 2 shows a perspective view of a grinding bowl according to FIG. 1, with two ring segments as intended, with the front ring segment not yet mounted;
• FIG 3 shows a further multi-part grinding bowl in a schematic perspective view from above with three upper ring segments and a lower one-piece base module, wherein a rear ring segment in an assembly phase is shown slightly spaced from the lower base module;
• Fig. 4 is a perspective view of the grinding bowl of FIG. 3 from below, wherein a continuous cavity opening can be seen.
• the grinding bowl 1 shown in Figures 1 and 2 will be described below with reference to both figures.
• the grinding bowl 1 according to FIG. 1 connected to a unit essentially has an approximately frustoconical outer structure with an inner cavity opening 5.
• the smallest outer diameter is therefore present with a planar bearing ring 13, while the upper ring segments 3, 4 with the grinding path 6 have the largest outer diameter.
• the multi-part grinding bowl 1 according to Figures 1 and 2 in this example consists of a one-piece base module 2 and two upper, formed as half-shells ring segments 3 and 4, which is placed as upper Mahlschüsselmodul 10 on an annular horizontal connecting surface 8 with the one-piece base module 2 and firmly connected are.
• the horizontal connecting surface 8 of FIG. 2 has a number of outer studs 18. Furthermore, a series of inner connecting pins 19 for improving the attachment of the two upper ring segments 3, 4 is provided.
• the illustrated ring segment 3, which extends over 180 °, has at its end faces vertical connecting surfaces 1 1 and 12. These connecting surfaces 1 1, 12 have approximately a T or a tilted by 90 ° H-shape, wherein at the projecting portions edge flanges for connection of the two ring segments 3, 4 are provided together and the resulting rigid ring 10 as the upper grinding bowl module 10th can be produced.
• the upper, consisting of the two ring segments 3, 4 Mahlschüsselmodul 10 on the lower one-piece base module 2 are particularly strongly attached, so that during operation of the grinding bowl 1 occurring torques and grinding forces in comparable How can be recorded as one-piece grinding bowls.
• an outer foot flange 14 and an inner foot flange 15 for fastening purposes with the bolts 18, 19 are provided in the lower region of the ring segments 3, 4.
• an outer mounting flange 16 and an inner, vertical edge flange 17 on the connecting surfaces 1 1, 12 for attachment of the two Ringsegemente 3, 4 are provided together.
• the so three-part grinding bowl 1 is designed due to the provided Stefansbefest Trenten in a comparable manner as a one-piece grinding bowl for receiving torsional and vertical forces. On the other hand, however, cheaper production costs and considerable improvements in the transport of the smaller assemblies and parts are achieved with this multi-piece grinding bowl.
• FIGS. 3 and 4 schematically show a grinding bowl 20 consisting of four subassemblies, wherein the same reference numerals as with FIGS. 1 and 2 also refer to the same parts and regions.
• Fig. 3 two upper bowl segments 22, 23 are shown as attached to the corresponding base module 2 and mounted assemblies.
• the further bowl segment 21 with a partial annular contour over about 120 ° is placed so to speak straight on an upper annular surface of the lower one-piece base module 2.
• the bowl segment 21 On the front side, the bowl segment 21 has vertically extending connecting surfaces 31 which, for example, come as a precisely fitting surfaces in a kind of T-shape against the vertical connecting surfaces 32 with the respective adjacent bowl segment 22 and 23 for conditioning and attachment.
• FIG. 4 The perspective view of the grinding bowl 20 of FIG. 3 is shown in Fig. 4 with a view from below.
• This grinding bowl 20 can be described roughly as a truncated cone contour which has a cavity opening 5 passing through from top to bottom in the interior.
• the outer contour of the grinding bowl 20 can be regarded as a contour widening from the bottom to the top of ring-like areas.
• the bowl segments 22, 23 shown in Fig. 4 have in the region of the vertical connecting surfaces 31 radially outwardly projecting connecting flanges 38, 39 which are intended for annular attachment of the bowl segments 22, 23, for example via bolt connections.
• a bottom surface 26 of the ring segment 21 is in the final assembly at least non-positively on an upper annular surface 25 of the base module 2, for example by means of rows of bolts as shown in Fig. 2, attached.

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Crushing And Grinding (AREA)
• Grinding Of Cylindrical And Plane Surfaces (AREA)
• Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
• Crushing And Pulverization Processes (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52003604

Family Applications (1)

Country Status (6)

Cited By (3)

Citations (6)

Family Cites Families (3)

• 2014
  • 2014-11-27 DK DK14195224.2T patent/DK3025784T3/en active
  • 2014-11-27 EP EP14195224.2A patent/EP3025784B1/de active Active
  • 2014-11-27 ES ES14195224.2T patent/ES2639816T3/es active Active
• 2015
  • 2015-10-27 JP JP2016547145A patent/JP6621751B2/ja active Active
  • 2015-10-27 WO PCT/EP2015/074787 patent/WO2016083045A1/de active Application Filing
  • 2015-10-27 CN CN201580006305.6A patent/CN106999941B/zh not_active Expired - Fee Related

Patent Citations (6)

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