SU613804A1 - Medium-speed roller mill - Google Patents

Description

one

This invention relates to the crushing of various materials, namely to a mid-hoop roller mill.

A known mid-crown roll mill in which the seal of the cover of the body in the places of passage of the roll axis is susceptible by means of the gland IJ,

The disadvantage of the known mill is that when working in a highly dusty environment, the stuffing box wears out quickly.

The closest technical solution to this invention is a mid-annual roll mill, comprising a housing with a lid, inside of which there is a roller, a sealing device in the form of a membrane at the passage of the roll axis through the lid 2,

The disadvantage of this mid-roll mill is that the membrane in the form of a membrane does not work reliably at high ambient temperatures. As a result of leakage, the stranded Iiia starts working with elevated suction cups, which drastically reduces the cost

installation work. This seal is not suitable for the operation of a pressure mill.

The purpose of the invention is to increase the reliability of 5 and the efficiency of the mill by ensuring the sealing of the seal assembly.

The goal is achieved by the fact that in the proposed mid-way roll

10 mill, comprising a housing with a lid, inside of which there is a roll, a sealing device at the point of passage of the axis of the screw; through the cover, sealing. device - made in the form of bellows

LS with corrugations of radii that decrease as they move away from the roll, and the curvature of the corrugations along the perimeter in the lower part is greater than the curvature of the corrugations in the upper part of the bellows.

20 In FIG. 1 schematically shows a mid-roll mill with a compacted unit in paapesej in FIG. 2 - bellows rfa of FIG. 3 - section A-A of FIG. 2

The mill contains bellows 1, mounted

Claims (2)

25 on the sleeve 2, the seal housing 3, the roll 4, the lever 5, the axis of the swing 6 of the lever 5 of your 4, the shaft 7 of the mill housing. During the operation of the mill during grinding, for example, the fuel roll 4 periodically rises and falls, while the roll lever 5 is deflected and rotates around axis 6. When the roll lever 5 is deflected, relative movements of the parts mounted on the roll axis are made. The sylphs 1, whose corrugations are reduced with an increasing radius of the curvature as they move away from the swing axis of the roll lever, squeezing or unclamping in accordance with the deviation of the roll arm, prevent the penetration of the dust-and-blend mixture into the pressure bar and the suction work under vacuum, the perforation of the corrugations along the upper part with a smaller radius of curvature, as compared with the lower one, eliminates the presence of deposits of explosive amount of dust between the sylphus corrugations. The hardening of the mill housing at the point of the roll axis or the oil drain sleeve is the high tightness of the metal bellows, which is not smudged during operation with a sufficiently large relative CMOiRHHii component of the axial and angular directions, as well as long service life metal bellows. Claims of the Srednekhodov Roller Mill, comprising a housing with a lid within which a roll is located, a sealing device at the point of passage of the roll axis through the lid, characterized in that, in order to increase the reliability and economy of the mill by sealing the sealable assembly, the sealing device The design is in the form of a bellows with corrugation radii decreasing as they are removed from the roll, and the curvature of the corrugations along the perimeter in the lower part is greater than the curvature of the corrugations in the upper part of the bellows. Sources of information taken into account in the examination: 1.Ilievich A.P. Equipment of the plants of the silicate industry, Gosstroyizdat, 1959, p. 210-213. 2. Lebedev, A.N., Preparation and Grinding of Fuel at Power Plants, Energie, 1969, p. 405. A - fk 9g.Z