CN205435873U - Medium speed pulverizer's mill tile - Google Patents

Abstract

The utility model provides a medium speed pulverizer's mill tile, overcomes above -mentioned not enough that current medium speed pulverizer mill tile exists through changing the bodily form made of baked clay form. The utility model discloses in the improvement done mill tile be: strengthen curvature radius to the R5400mm of mill tile recess molded lines, reduce the outer circumferential edge of mill tile along width to 27mm, mill tile increase in thickness to the 125mm of position in the minimum that mill. The utility model discloses an actively the effect is: novel mill tile recess molded lines adopts great curvature radius, because curvature radius is great, the molded lines is milder, reduces the marginal width of mill tile simultaneously, increases the area of effectively milling, makes and drops on the regional raw coal quality relative increment that mills between grinding roller roller shell and the mill tile to improve exerting oneself of coal pulverizer, more be favorable to the stability of equipment operation. Simultaneously, owing to increased the mill thickness at position of mill tile, prolong the life of mill tile, shortened the overhaul of the equipments cycle, be favorable to reducing the maintenance cost of user's repair time, overhaul period and equipment.

Description

A kind of millstone sheet of medium-speed pulverizer

Technical field

This utility model belongs to Work machine, is specifically related to the wheeled coal pulverizer of middling speed.

Background technology

The wheeled coal pulverizer of middling speed is the coal dust that raw coal is milled into certain fineness with mill parts grinding roller and millstone sheet, completes coal dust is dried and is delivered to the equipment outside mill simultaneously.Grinding roller that key component by horizontally disposed mill, is supported by mill, mill rotational power plant, coal dust wind model air supply device.Assemble multistage on mill therein and be connected into the millstone sheet of circumference.Described millstone sheet is fan-like pattern in radially (the horizontal plane projection) of phase countershaft.Millstone sheet bottom surface is plane, upper surface have the milled grooves that the circular arc with covering of the fan concentric moves towards, millstone sheet is in the end profile of direction of rotation, and the bottom land contour line of upside is the camber line that outside is high, inner side is low, being flat line at the bottom of the mill of downside, side-looking overall profile is similar to letter L-shaped.Bottom land contour line (is commonly referred to as in the industry " molded line ").The millstone sheet of the wheeled coal pulverizer of middling speed in the past, molded line is typically designed to distance (the millstone sheet outer circumferential edges width) 65mm of R400, molded line outer end and millstone sheet covering of the fan excircle, millstone sheet thinnest part (molded line minimum point and bottom surface distance) thickness 115mm.In coal pulverizer runs, research finds, molded line radius of curvature is less than normal, and curve is sharper, simultaneously millstone sheet border width, and the area of effectively milling between parts of milling is less, and the coal load quantity in the unit interval is less, and exerting oneself of coal pulverizer is less；Simultaneously as the part thickness easy to wear of millstone sheet is relatively thin, its service life is relatively short, it is relatively frequent to change, and equipment overhaul cycle is short, adds user's expense to plant maintenance.

Summary of the invention

The purpose of this utility model is to provide a kind of medium-speed pulverizer millstone sheet, by changing watt shape, overcomes existing medium-speed pulverizer millstone sheet above shortcomings.

The improvement in this utility model done millstone sheet is: strengthen millstone sheet concave groove type curvature of a curve radius to R5400mm, reduces millstone sheet outer circumferential edges width to 27mm, and millstone sheet position of milling increases to 125mm at the thickness of minimum point.

Good effect of the present utility model is: Novel grinding disc watt groove molded line uses bigger radius of curvature, owing to radius of curvature is bigger, molded line ratio is shallower, reduce millstone sheet border width simultaneously, increase area of effectively milling, the raw coal quality in region of making to mill between grinding roller roller shell and millstone sheet increases relatively, thus improves exerting oneself of coal pulverizer, and what the equipment that is more beneficial for ran stablizes.Mill the thickness at position simultaneously as add millstone sheet, extend the service life of millstone sheet, shorten equipment overhaul cycle, advantageously reduce the maintenance cost of the repair time of user, time between overhauls(TBO) and equipment.

Accompanying drawing explanation.

Fig. 1 is this utility model millstone sheet top view；

Fig. 2 is this utility model millstone sheet end view drawing；

Fig. 3 is the new old-fashioned millstone sheet end face comparison diagram of this practicality；

In figure:hMilling the position thickness in minimum point for this utility model millstone sheet, h1 is that existing millstone sheet is milled the position thickness in minimum point.R is this utility model millstone sheet groove molded line radius of curvature, and R1 is existing millstone sheet groove molded line radius of curvature.B is this utility model millstone sheet covering of the fan excircle and the distance that the distance of molded line end points, b1 are existing millstone sheet covering of the fan excircle and molded line end points.

Detailed description of the invention

Refering to Fig. 1, Fig. 2, on the basis of existing radial direction is the millstone sheet that fan-like pattern, end face are L-shaped, position of being milled by millstone sheet increases to 125mm in the thickness h of minimum point.Concave groove type curvature of a curve radius R is increased to 5400mm, millstone sheet covering of the fan outer circumferential edges width (periphery and the distance of molded line end points) b and is set as 27mm.

Claims (1)

1. a millstone sheet for medium-speed pulverizer, is characterized in that: millstone sheet concave groove type curvature of a curve radius is 5400mm, and millstone sheet outer circumferential edges width is to 27mm, and millstone sheet position of milling is 125mm at the thickness of minimum point.