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CN-119406515-B - Grinding mechanism of vertical roller mill

CN119406515BCN 119406515 BCN119406515 BCN 119406515BCN-119406515-B

Abstract

The invention provides a grinding mechanism of a vertical roller mill, which comprises a driving mechanism and a grinding disc, wherein the driving mechanism is arranged above the grinding disc, a plurality of groups of transmission shafts are arranged on the annular side of the driving mechanism, a grinding unit is assembled on the transmission shafts and comprises grinding rollers, a rotating sleeve rod and a connecting rod, the connecting rod is fixedly connected with the transmission shafts, the rotating sleeve rod is nested on the transmission shafts, the grinding rollers are arranged on the rotating sleeve rod, a transmission rod piece is arranged between the rotating sleeve rod and the connecting rod and connected, and the grinding rollers are suspended above the grinding disc. According to the transmission rod provided by the invention, the transmission rod deforms along with the rotation of the transmission shaft to pull the rotary sleeve rod to change the gap between the grinding roller and the grinding disc, the grading treatment is realized through active change adjustment, the particle diameter of the material is treated step by step, the frequent change of the stress of the grinding roller is reduced, the action effect of the grinding roller and the material is improved, and therefore, the efficiency of the processing process is improved.

Inventors

  • ZHANG DIE
  • XU TAO
  • FU CHAO
  • XIE ZHIYONG
  • ZHOU ZHUJIE
  • YE FAN

Assignees

  • 中建材秦鸿(湖北)新材料有限公司
  • 合肥水泥研究设计院有限公司

Dates

Publication Date
20260512
Application Date
20241209

Claims (8)

  1. 1. A grinding mechanism of a vertical roller mill, comprising: The grinding device comprises a driving mechanism (100) and a grinding disc (300), wherein the driving mechanism (100) is arranged above the grinding disc (300), a plurality of groups of transmission shafts (130) are arranged on the annular side of the driving mechanism (100), and the driving mechanism (100) comprises a driving motor (110); The grinding unit (200) is assembled on the transmission shaft (130), the grinding unit (200) comprises a grinding roller (210), a rotary sleeve rod (220) and a connecting rod (230), the connecting rod (230) is fixedly connected with the transmission shaft (130), the rotary sleeve rod (220) is nested on the transmission shaft (130), and the grinding roller (210) is arranged at one end, far away from the connecting rod (230), of the rotary sleeve rod (220); A transmission rod piece (240) is arranged between the rotary sleeve rod (220) and the connecting rod (230), the transmission rod piece (240) comprises a first connecting rod (241) and a second connecting rod (242), the first connecting rod (241) is hinged on the connecting rod (230), and two ends of the second connecting rod (242) are respectively hinged on the first connecting rod (241) and the rotary sleeve rod (220); The grinding roller (210) is suspended above the grinding disc (300), the transmission rod (240) deforms along with the rotation of the transmission shaft (130) to draw the rotary sleeve rod (220) to change the gap between the grinding roller (210) and the grinding disc (300), the tail end of the transmission shaft (130) far away from the transmission mechanism (120) is also provided with a return spring (140), the return spring (140) is connected with the end surface of the grinding roller (210) far away from the rotary sleeve rod (220), the tail end of a motor shaft (111) of the driving motor (110) is provided with a driving wheel (121), the end of the transmission shaft (130) far away from the return spring (140) is provided with a driven wheel (122), and the first connecting rod (241) is provided with a balancing weight (243); The rotating loop bar (220) comprises a front bar (222), a rear bar (223) and a spring (224), wherein one end of the front bar (222) extends into the rear bar (223), and the spring (224) is nested outside the front bar (222) and the rear bar (223) and is respectively connected with the front bar (222) and the rear bar (223); The front rod (222) is provided with a hinge seat (221), one end, far away from the first connecting rod (241), of the second connecting rod (242) is hinged to the hinge seat (221), and one end, far away from the front rod (222), of the rear rod (223) is connected to the grinding roller (210).
  2. 2. The grinding mechanism of a vertical roller mill according to claim 1, characterized in that the driving mechanism (100) further comprises a transmission mechanism (120), and the transmission shaft (130) extends out of the transmission mechanism (120) from the ring side of the transmission mechanism (120).
  3. 3. A grinding mechanism of a vertical roller mill according to claim 2, characterized in that the transmission shaft (130) is arranged perpendicular to the motor shaft (111) of the drive motor (110), the rotating sleeve (220) is arranged parallel to the rotation plane of the grinding disc (300), and the grinding roller (210) has a truncated cone structure.
  4. 4. A grinding mechanism of a vertical roller mill according to claim 3, characterized in that the rotation axis of the driven wheel (122) is perpendicular to the rotation axis of the driving wheel (121).
  5. 5. A grinding mechanism of a vertical roller mill according to claim 2, characterized in that the transmission shaft (130) is arranged obliquely to the motor shaft (111) of the drive motor (110), the rotating sleeve (220) is arranged obliquely to the plane of rotation of the grinding disc (300), and the grinding roller (210) has a cylindrical structure.
  6. 6. A grinding mechanism of a vertical roller mill according to claim 5, characterized in that the angle between the rotation axis of the driven wheel (122) and the rotation axis of the driving wheel (121) is an obtuse angle.
  7. 7. A grinding mechanism of a vertical roller mill according to claim 1 or 6, characterized in that an end of the first connecting rod (241) remote from the balancing weight (243) is rotatably connected to the connecting rod (230), and the second connecting rod (242) is rotatably connected to a middle section of the first connecting rod (241).
  8. 8. The grinding mechanism of a vertical roller mill according to claim 7, wherein guide holes for receiving the transmission shaft (130) are formed in the rotating sleeve rod (220) and the grinding roller (210), the transmission shaft (130) penetrates through the rotating sleeve rod (220) and the grinding roller (210) through the guide holes, and the rotating sleeve rod (220) is elastically connected with the grinding roller (210).

Description

Grinding mechanism of vertical roller mill Technical Field The invention belongs to the technical field of vertical roller grinders, and particularly relates to a grinding mechanism of a vertical roller grinder. Background The vertical roller mill drives the millstone to rotate through the motor and the speed reducer, materials fall at the center of the millstone from the feed inlet through the air locking feeder, and meanwhile, hot air enters the mill from the air inlet. Along with the rotation of the millstone, the materials move towards the edge of the millstone under the action of centrifugal force, are crushed by the grinding roller when passing through the annular groove on the millstone, the crushed materials are carried up by the high-speed airflow of the air ring at the edge of the millstone, large particles directly fall onto the millstone for re-grinding, when the materials in the airflow pass through the upper separator, under the action of the rotating rotor, coarse powder falls onto the millstone from the cone hopper for re-grinding, and qualified fine powder is taken out of the millstone along with the airflow and is collected by the dust collecting device, so that the product is obtained. The large-particle materials in the vertical roller mill can return to the millstone again for grinding processing under the action of cyclone separation, and the millstone can be changed with the clearance between the millstone in the grinding process by adopting a passive structure in the prior art neutral roller mill. Disclosure of Invention The invention provides a grinding mechanism of a vertical roller mill, and aims to solve the problem that the grinding efficiency is low due to the fact that grinding rollers cannot effectively act on materials when the sizes of particle diameters of materials on grinding disks of the vertical roller mill are different at present and the extrusion stress of the grinding rollers is uneven. The invention is realized in that a grinding mechanism of a vertical roller mill comprises: the device comprises a driving mechanism and a grinding disc, wherein the driving mechanism is arranged above the grinding disc, and a plurality of groups of transmission shafts are arranged on the annular side of the driving mechanism; the grinding unit is assembled on the transmission shaft and comprises a grinding roller, a rotating sleeve rod and a connecting rod, the connecting rod is fixedly connected with the transmission shaft, the rotating sleeve rod is nested on the transmission shaft, and the grinding roller is arranged at one end of the rotating sleeve rod far away from the connecting rod; a transmission rod piece is arranged between the rotating sleeve rod and the connecting rod, the transmission rod piece comprises a first connecting rod and a second connecting rod, the first connecting rod is hinged on the connecting rod, and two ends of the second connecting rod are respectively hinged on the first connecting rod and the rotating sleeve rod; the grinding roller is suspended above the grinding disc, and the transmission rod is deformed along with the rotation of the transmission shaft to pull the rotary sleeve rod to change the gap between the grinding roller and the grinding disc. Preferably, the driving mechanism comprises a driving motor and a transmission mechanism, and the transmission shaft extends out of the transmission mechanism from the ring side of the transmission mechanism; preferably, the transmission shaft is arranged perpendicular to a motor shaft of the driving motor, the rotating sleeve rod is arranged parallel to a rotating plane of the grinding disc, and the grinding roller is in a circular truncated cone structure. Preferably, the tail end of a motor shaft of the driving motor is provided with a driving wheel, one end of the transmission shaft, which is far away from the reset spring, is provided with a driven wheel, and the rotation axis of the driven wheel is perpendicular to the rotation axis of the driving wheel. Preferably, the transmission shaft is arranged obliquely to a motor shaft of the driving motor, the rotating sleeve rod is arranged obliquely to a rotating plane of the grinding disc, and the grinding roller is of a cylindrical structure. Preferably, the end of the motor shaft of the driving motor is provided with a driving wheel, one end of the transmission shaft, which is far away from the reset spring, is provided with a driven wheel, an included angle between the rotation axis of the driven wheel and the rotation axis of the driving wheel is an obtuse angle, the end of the transmission shaft, which is far away from the transmission mechanism, is also provided with a reset spring, and the reset spring is connected with the end face, which is far away from the rotating loop bar, of the grinding roller. Preferably, the first connecting rod is provided with a balancing weight, one end of the first connecting rod, which is far away from the bala