Abrasion detection method of roll disk type coal mill nozzle ring

Abstract

The invention relates to the technical field of equipment detection, and provides an abrasion detection method of a roll disk type coal mill nozzle ring. The method comprises the following steps of selecting a measurement section, wherein the measurement section is a plane which penetrates through a center shaft of the nozzle ring and intersects with an abrasion surface of a nozzle blade; detecting abrasion quantity of a nozzle step, wherein an intersecting line of an upper surface of the nozzle step and the measurement section is a line segment L1, the difference between an original radial width A of the nozzle step and the line segment 1 is the abrasion quantity of the nozzle step; and detecting the abrasion quantity of each nozzle blade, wherein the intersecting line of the abrasion surface and the measurement section is a curve L2, the distance between the curve L2 and the upper surface of each nozzle blade is the abrasion quantity of the corresponding nozzle blade. By selecting the measurement section, the abrasion detection method of the roll disk type coal mill nozzle ring is convenient to detect; the nozzle ring is prevented from breaking away from an abrasive disk by detecting the abrasion quantity of the nozzle step; and the throat size between the nozzle blades is in the normal use range by detecting the abrasion quantity of the nozzle blades.

Description

technical field [0001] The invention relates to the technical field of equipment detection, in particular to a wear detection method for a nozzle ring of a roller disc coal mill. Background technique [0002] Roller disc coal mill is widely used in thermal power generation, cement, coal and other industrial and mining enterprises due to its advantages of wide adaptability to coal types, high grinding efficiency, low power consumption, safety and reliability. [0003] The nozzle ring is cast in one piece to change the aerodynamic field at the nozzle. It consists of a nozzle step fixed to the grinding disc, a ring body and multiple nozzle blades arranged at intervals on the outer periphery of the ring. The nozzle step is set at one end of the ring body. The lower surface of the nozzle step is connected to the end face of one end of the ring body, and the upper surface is the end face. The nozzle step is provided with a plurality of threaded holes at intervals, and the nozzle s...

AI Technical Summary

Problems solved by technology

After the nozzle blades are worn, the size of the throat between the nozzle blades becomes larger, and the optimum flow area cannot be maintained, which causes the flow velocity of the hot air to change, resulting in excessive discharge of pebble coal and a decrease in the output of the coal mill; after the nozzle steps are worn, resulting in The connection strength between the nozzle ring and the grinding disc is weakened, and there is a risk of the nozzle ring falling off

Images