JP2009034675A - Mill gear for roller mills - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mill gear that can be used for roller mills with a mechanism for turning a crushing roller on a crushing pan, is applicable to any roller mills regardless of their particular sizes and rated capacity, can reduce cost for members and shorten the delivery period, and exerts appropriate load distribution. <P>SOLUTION: A bevel-gear wheel step 10 receives motive energy and then the energy is supplied from one or a plurality of planetary wheel steps 5 to a crushing pan. A driving port of the bevel-gear wheel step 10 is not a single large driving port unit, but is comprised of a plurality of individual driving ports 11 and 12. When rotative power is supplied to the individual driving ports 11 and 12, the rotative power is transmitted to the corresponding bevel-gear pinions 15 and 16. The rotative power of the bevel-gear pinions 15 and 16 is transmitted to the vertical drive shaft 21 via the bevel-gear wheel 20 to be engaged therewith, and then further transmitted to the planetary wheel step(s) 5 via a connector 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mill gear for a roller mill described in the premise of claim 1 of the present application.

  The roller mill is an apparatus that rolls on a crushing pan that rotates a crushing roller that can be elastically pressurized and crushes the mineral crushed material, and is particularly suitable for crushing cement raw materials, cement clinker, coal, ore and the like. Supply of crushing power to the roller mill is normally performed by a single drive mechanism that transmits rotational power generated by a single prime mover to a crushing pan via a single drive port and a set of gears. The crushing roller can be driven by a drive port different from the crushing pan.

  Usually, the drive mechanism for the crushing pan is a combination of a bevel gear and one or more planetary gears, and is often arranged and connected to rotationally drive the crushing pan from below.

  What is eagerly desired for the roller mill is to increase the throughput and efficiency, and to reduce the material cost and the delivery time. In order to increase the throughput, the roller mill can be enlarged, but this requires an increase in the size of the mill gear and an increase in the size and output of the prime mover. Generally, the prime mover that is commercially available cannot meet such demands. If a dedicated prime mover is prepared, the cost of parts and the delivery time will be increased or delayed.

  One of the objects of the present invention is to provide a mill gear that can be used in any size and any rated capacity of a roller mill, can meet the demand for lower cost and shorter delivery time, and has an appropriate load distribution inside. There is.

  This object is achieved by the matters described in the characterizing part of claim 1 of the present application. Other claims, specifications and drawings are preferred and beneficial embodiments of the present invention.

  The roller gear for a roller mill according to the present invention first includes a bevel gear stage for receiving power and one or a plurality of planetary wheel stages for sending power to a crushing pan. The drive port provided in the bevel wheel stage is not a single-type drive port having a scale corresponding to the scale of the apparatus, but the drive mechanism, particularly the drive port, is provided in a plurality of parts. Each drive port (individual drive port) is provided with a bevel tooth pinion, and both the bevel tooth pinions are engaged with the same bevel tooth wheel.

  According to the present invention, a plurality of individual drive ports are used in the umbrella wheel stage instead of a large drive port, and these are appropriately arranged around and inside the umbrella wheel and gear case. It is possible to use a commercial motor with a small output, for example, a small commercial motor, and therefore the cost and delivery time can be considerably reduced and shortened as compared with the prior art.

  In addition, since multiple individual drive ports can be arranged so as to be distributed at equal angular intervals around and inside the same bevel wheel or gear case, some of the multiple individual drive ports and prime movers have malfunctioned. If it is only, the operation | movement of a roller mill can be continued using the remaining separate drive port and motor | power_engine. In a conventional mill gear that employs a configuration in which a large single drive port is provided on a bevel gear stage, if the drive port or prime mover fails, the roller mill shuts down completely and becomes inoperable. Since there are a plurality of ports, even if the individual drive port or the prime mover breaks down, the output to the crushing pan is reduced correspondingly, and the operation of the roller mill itself is not stopped. Moreover, the failed individual drive port or prime mover can be replaced while continuing the operation of the roller mill.

  Moreover, since the plurality of bevel tooth pinions may have the same configuration, the cost can be reduced accordingly. Furthermore, since the receiving power and the number of each individual drive port can be changed, it is possible to provide a mill gear having a capacity suitable for the processing capacity of the roller mill at the mounting destination. Moreover, the motor | power_engine connected to a bevel-tooth wheel stage may be horizontal installation or vertical installation, and it can replace | exchange arbitrarily in any way. In the case of vertical installation, for example, a configuration is adopted in which a spur gear pinion is driven by the prime mover, a spur gear (for example, a cylinder gear) to be engaged is rotated in a horizontal plane, and the vertical drive shaft is rotated by the rotation. That's fine. And the effect of the load distribution by individual drive port arrangement | positioning can be strengthened by mutually synchronizing the driving | operation of the motor | power_engine connected to each individual drive port, for example, an electric motor.

  Hereinafter, the mill gear for a roller mill according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings. First, the mill gear 2 according to this embodiment is a two-stage mill gear for a roller mill, and includes two stages housed in a gear case 4, that is, a planetary wheel stage 5 and a bevel wheel stage 10.

  Among them, the planetary wheel stage 5 includes a sun wheel 6 located at the center, a plurality of planet wheels 7 around the sun wheel 6, and a ring gear 9 surrounding the planet wheels 7. Each planet wheel 7 is individually guided by the planet carrier 8 while being supported by the internal teeth of the ring gear 9 which is an internal gear wheel. Since the planet carrier 8 is connected to the output delivery flange 3 via the driven shaft 19, when the planet carrier 8 rotates, the output delivery flange 3 and thus a crushing pan (not shown) on the output delivery flange 3 rotates.

  The sun wheel 6 of the planetary wheel stage 5 is driven by the umbrella wheel stage 10 upstream of the sun wheel 6 via a vertical drive shaft (axle) 21 and a gear-type coupler 22. When the sun wheel 6 is driven, the planet wheel 7 meshing with it rotates, and the planet carrier 8 meshing with it rotates, and the output delivery flange 3 and thus the crushing pan rotate.

  In this embodiment, a plurality of individual drive ports are provided instead of a single main drive port in order to optimize power propagation around the umbrella wheel stage 10. In the drawing, only two individual drive ports (11, 12) are shown, but three or more individual drive ports may be used.

  That is, in the illustrated example, the two individual drive ports 11 and 12 are arranged opposite to each other. However, as can be understood, an individual drive port can be added in addition to the two. In that case, it is desirable to arrange the individual drive ports so that the distance between the individual drive ports around the same bevel wheel 20 or inside or around the gear case 4 is an equal angle. Therefore, two individual drive ports may be provided by adding two to the illustrated example, or more individual drive ports may be provided. For example, the same number of individual drive ports as the crushing rollers that roll on the crushing pan may be provided.

  The individual drive ports 11 and 12 have separate bevel tooth pinions 15 and 16, and the individual bevel tooth pinions 15 and 16 are further connected to separate drive shafts 13 and 14, respectively. The shafts 13 and 14 extend in the lateral direction and are connected to separate prime movers such as an electric motor (not shown).

  Since the individual bevel tooth pinions 15 and 16 are engaged with the same bevel tooth wheel 20 on the other side, the vertical drive shaft 21 is rotated when the bevel tooth pinions 15 and 16 are rotated by the corresponding individual prime movers. The planetary wheel stage 5 and thus the driven shaft (output shaft) 19 are driven by the rotation of the vertical drive shaft 21, and the crushing pan thereon rotates.

  Thus, according to the mill gear 2 of the present embodiment, the load distribution can be optimized not only for the planetary wheel stage 5 but also for the bevel wheel stage 10 positioned below the planetary wheel stage 5. Although the mill gear 2 in the illustrated example has a two-stage configuration, the present invention is not limited to two stages.

  In addition, since the drive ports are individualized to be plural, each prime mover can be made smaller or smaller in output than in the past. Therefore, since a commercially available component such as a commercially available electric motor can be used as a prime mover, it is not necessary to use an expensive custom-made product, which is advantageous in terms of both cost and delivery time.

  The prime mover that can be downsized by individualizing the drive ports can be placed horizontally or vertically, although not shown. These motors, for example, electric motors, can be attached to and detached from the individual drive ports with respect to the vertical drive shaft 21 by appropriately designing a connecting portion between the motor and the individual drive ports (not shown). That is, the replacement can be performed at any time and quickly.

It is a typical longitudinal section showing an outline of a mill gear for roller mills concerning one embodiment of the present invention.

Explanation of symbols

  2 mil gear, 3 output delivery flange, 4 gear case, 5 planetary wheel stage, 6 sun wheel, 7 planet wheel, 8 planet carrier, 9 ring gear, 10 bevel wheel stage, 11, 12 individual drive port, 13, 14 individually Drive shaft, 15, 16 Individual bevel pinion, 19 Drive shaft, 20 Bevel wheel, 21 Vertical drive shaft, 22 Gear type coupler.

Claims (7)

A mill gear comprising a bevel wheel stage (10) for receiving power and one or more planetary wheel stages (5) for sending power to the crushing pan for use in a roller mill that rolls the crushing roller on the crushing pan. The umbrella wheel stage (10) includes a bevel tooth wheel (20) having teeth and a vertical drive shaft (21) connected to the planetary wheel stage (5) via a coupler (22). In mill gear having
The umbrella wheel stage (10) is provided with a plurality of individual drive ports (11, 12) corresponding to the individual drive ports (11, 12) and is engaged with the umbrella wheel (20). (15, 16)
A mill gear characterized by eliminating the need for a single large drive port.   2. The mill gear according to claim 1, wherein the plurality of individual drive ports (11, 12) are connected to different prime movers, for example, electric motors, via separate drive shafts (13, 14), and the prime movers are synchronized with each other. Mill gear characterized by operating.   The mill gear according to claim 1 or 2, wherein the receiving power for each individual drive port (11, 12), the number of individual drive ports (11, 12) or both are set according to the processing capability required for the roller mill. Mill gear characterized by being.   The mill gear according to any one of claims 1 to 3, wherein the plurality of individual drive ports are distributed at equal angular intervals around or inside the same bevel wheel (20) or gear case (4). (11, 12) is a mill gear characterized by being arranged.   5. The mill gear according to claim 1, wherein at least one of the individual drive ports (11, 12) has a drive shaft (13, 14) -to-prime motor coupling portion that attaches or detaches a horizontally placed prime mover. 6. A mill gear characterized in that it can be configured.   6. The mill gear according to claim 1, wherein the individual individual drive ports (11, 12) or the individual individual drive ports (11, 12) or the individual individual drive ports (11) so that the operation of the roller mill is continued even if a malfunction occurs in the prime mover. , 12) is configured.   7. The mill gear according to claim 1, wherein the plurality of individual drive ports (11, 12) are driven by a vertically installed prime mover, and the spur teeth And a spur gear that meshes with the gear and rotates in a substantially horizontal plane.

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