Grinding roller device of medium-speed mill

Abstract

The invention discloses a grinding roller device of a medium-speed mill. The grinding roller device comprises a hinge shaft seat fixing piece, a roller frame, a shaft sleeve, a roller core, a right pressing plate, a roller shaft, a non-return sealing air short pipe and a transparent cover. According to the invention, damage to a mill hinge shaft seat during disassembly of a grinding roller is reduced through the hinge shaft seat fixing piece; the roller frame is provided with a sealing opening and the non-return sealing air short pipe is added, so that uniform distribution of air pressure of sealing air is promoted, and the dust prevention efficiency of the sealing air is improved; the right pressing plate, the roller shaft, an axis air pipe, the right pressing plate and the shaft sleeve form an oil injection and ash removal cavity, so that oil injection and ash removal operation on the grinding roller is facilitated; the shaft sleeve and the transparent cover form a group of labyrinth sealing structures, so that sealing performance of a root part of the grinding roller is enhanced; and a boss is arranged on one side of a large end of the roller core, so that the roller sleeve can be conveniently positioned during installation, an overhaul process of the grinding roller of a mill is simplified, an abrasion speed of a grinding roller bearing is reduced, disassembly and overhaul frequency of the mill is reduced, a daily maintenance period is shortened, and fault-free service time of a medium-speed mill is further prolonged.

Description

technical field [0001] The invention relates to a medium-speed coal mill grinding roller device, in particular to a semi-industrial roller vertical mill system suitable for the crushing and grading process of mineral materials. [0002] technical background [0003] By 2050, primary energy consumption still accounts for 66.3% of the world's energy structure, while coal accounts for 24.7% of total primary energy consumption, most of which are used for power generation. At the same time, coal consumption and consumption proportion have been at a high level for a long time, and the steady increase in the capacity of thermal power generators for 12 consecutive years also indicates that thermal power as the main power generation mode will not change for a long time. Inhalable particulate matter, sulfur oxides, and nitrogen oxides produced by coal combustion are one of the main causes of air pollution. How to achieve efficient coal utilization and energy conservation and environme...

AI Technical Summary

Problems solved by technology

The currently used grinding rollers of coal mills have the following deficiencies: First, because the sealing air enters from the top of the roller shaft, the shielding of the roller shaft leads to uneven distribution of the sealing air and poor blowback effect, which cannot ensure the sealing of the root of the grinding roller. The fine-grained material enters the grinding roller bearing cavity through the root of the grinding roller, causing rapid wear of the bearing and grinding roller jamming, increasing the frequency of mill jamming failures, increasing the frequency of shutdown maintenance and equipment maintenance costs

Secondly, the oil seal is a vulnerable part, and the oil seal is directly connected to the bearing cavity, so that the damaged oil seal can easily enter the bearing cavity and affect the bearing.

Thirdly, the installation and positioning of the roller sleeve is not accurate, and it is easy to be installed incorrectly; the thread of the shaft seat is easy to be worn due to the collision of the grinding roller when the grinding roller is disassembled, and it cannot be reinstalled, which requires a lot of man-hours to process

Finally, due to the compact structure and small size of the semi-industrial mill, the mill separator must be hoisted and disassembled for oil filling and maintenance of the grinding roller bearing cavity, which greatly increases the maintenance workload and difficulty

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