Double-driving roller type vertical mill

Abstract

The invention provides a double-driving roller type vertical mill, which comprises a vertical mill barrel body, wherein a powder selection machine, an inner ash hopper and an abrasive disk are arranged in sequence from top to bottom in the inner cavity of the vertical mill barrel body; the bottom of the abrasive disk is installed and fixed on the output supporting connection disk of a weight carrying supporting barrel body; one end of each transmission grinding roller mechanism is positioned in the vertical mill barrel body and is evenly distributed above the circumference of the abrasive disk; the outer surface of the output supporting connection disk is provided with a connecting flange; a connecting flange is locked and connected with a large tooth ring through a plurality of bolts; thelarge tooth ring drives the output supporting connection disk to rotate through a plurality of vertical heavy load speed reduction device; each transmission grinding roller mechanism comprises a loading hydraulic oil cylinder, a supporting seat, a rocker arm and a grinding roller component; and the vertical mill barrel body is provided with an annular air duct hole which communicates with a material discharging annular channel. By use of the double-driving roller type vertical mill disclosed by the invention, materials enter a powder grinding gap in a uniform way, powder grinding efficiency is improved, and operation stability is high.

Description

technical field [0001] The invention relates to the field of roller vertical mill equipment, in particular to a double-drive roller vertical mill. Background technique [0002] The roller vertical mills in the current technology are all driven by the transmission system to drive the grinding disc, and the fed materials fall into the center of the grinding disc, and are crushed by multiple groups of grinding rollers during the process of rotating with the grinding disc and performing centrifugal motion, and are passed through the friction force of the crushed material. Drive each group of grinding rollers to rotate. Due to the rotation of the grinding table and the passive rotation of the grinding roller, the material on the material layer will not be pulled into the rolling area well, but will form a piled extrusion state, the material bed will be unstable and the rolling efficiency will decrease. In addition, because the reducer of the roller vertical mill needs to transmi...

AI Technical Summary

Problems solved by technology

Due to the rotation of the grinding table and the passive rotation of the grinding roller, the material on the material layer will not be pulled into the rolling area well, but will form a piled extrusion state, the material bed will be unstable and the rolling efficiency will decrease

In addition, because the reducer of the roller vertical mill needs to transmit power and bear the heavy load of the grinding pressure, a special roller mill reducer must be designed, and the production cost is several times that of the ordinary reducer, especially due to the modern design concept and energy saving Grinding requires large-scale production, the size of the grinding disc increases, and the number of grinding rollers on the grinding disc has tended to be four or six. One grinding disc drives multiple grinding rollers to rotate by themselves through friction, so the special reducer and motor power required are large and Difficult to manufacture and high cost, becoming the bottleneck of large-scale roller mills

[0003] Because the traditional roller vertical mill uses a single motor to drive the grinding disc to rotate through a vertical reducer, the power of the single motor is relatively large, especially after the vertical mill is enlarged. Change the rotation speed of the grinding disc to achieve adjustable grinding disc speed. Due to the high power of the motor, it is difficult to find a suitable frequency conversion device. Even if it can be found, the purchase cost is high and it is difficult to promote it.

[0004] Although the traditional roller vertical mill has been widely used, if you look at the higher requirements, you will find many problems, and more technological progress and development are needed

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