CN85105208B - roller mill - Google Patents

Abstract

A roller mill comprising a grinding disc rotatably driven about a substantially vertical axis, the grinding disc being adapted to receive material in a central region around said axis, the grinding disc having a substantially horizontal upper surface with an annular recess radially outwardly of the central region, the underside being curved, and at least one roller having an axis of rotation above the grinding disc and intersecting the axis of the grinding disc, the roller extending into the recess, the cross-sectional profile of the outer peripheral surface of the roller being curved. When the mill is used, the grinding disc and the rollers are rotated and the material is spread into the gap between the peripheral surface of the rollers and the bottom of the trough. The grinding disc has an annular protrusion on its upper surface adjacent the outer periphery of the slot to block the gap space.

Description

Roll grinding machine

The present invention relates to a kind of vertical edge mill, be used for cinder or blast furnace cinder are pulverized into cement raw material.

Fig. 1 has represented a kind of general vertical roll grinding machine, and it is published on " day the disclosure special permission communique " on January 22nd, 1985 60-1215 number.Among Fig. 1, a rotating grinding board 2 has cannelure 4, has only represented 1 among the several rollers 6(figure) be supported on the groove 4, between groove and roller, form a clearance space 8, this space 8 radially outwards narrows down, and stops that the material that pulverized outwards flows, thus make pulverize more effective.

The purpose of this invention is to provide a kind of vertical roll grinding machine, it can make the material that is pulverized remain in the rotating grinding board groove, when material being exerted pressure with convenient roller, the sliding force of in groove, going up in the outer part affact effectively material bed on, and it is fine ground.

Comprise a mill according to roll grinding machine of the present invention.This mill can be driven in rotation on a basic vertical axle, and can receive material in a central area around axle.The upper surface that a basic horizontal is arranged on the mill, the central area of upper surface radially outward located a cannelure, the basal surface of groove is crooked.At least one roller with rotating shaft is stretched in the groove, and the rotating shaft of roller intersects with mill spindle above the upper surface of mill.The cross section of roller periphery surface is crooked.When using edge mill, make the rotation of mill and roller, material is diffused between the basal surface by the periphery surface of roller and groove in the formed clearance space.Mill has an annular outstanding on the upper surface of the neighboring of adjacent grooves, is used for blocking clearance space.

Most preferred embodiment of the present invention, as shown in drawings, wherein:

Fig. 1 is a kind of partial side view of axial cross section of general roll grinding machine.

Fig. 2 to 5 is partial side views of the axial cross section of several embodiment of the present invention.

Fig. 6 is the cross-sectional view at VI along the line-VI place among Fig. 5.

In the accompanying drawings, corresponding part is provided identical reference number.

Among Fig. 2, vertical roll grinding machine includes the rotating grinding board 2a that an antifriction metal (AFM) is made, and this mill is supported on (not shown) on the base, is driven on a vertical axis 10 during work.The upper surface of mill 2a is fixed with the liner 12 of an annular, and liner 12 has cannelure 4a on the surface thereon, and groove 4a generally is circular from the cross section that comprises mill spindle 10.

The material (not shown) that need pulverize is fed to the center of mill 2a, and material radially outward moves by centrifugal action, enters among the groove 4a.

Several rollers 6a is contained in the top of mill 2a.Each roller 6a is an axle journal with an end of rocking arm 14, and the other end of rocking arm rotatably is supported in the vertical plane that comprises mill spindle 10 on the pedestal of pulverizer, but can not leave above-mentioned vertical plane.The outer periphery surface 18 of roller 6a sees it is circular on the cross section that comprises rotating shaft 20.

To lower swing, and when material outwards moved through narrow gap 16 between roller surfaces 18 and the groove 4a, roller 6a just was pressed in above the material each roller 6a and rocking arm 14 by general pressure apparatus (not shown).So material is compressed between roller and groove and pulverizes.

From the sagittal plane 22 of the longitudinal center line of roller 6a along radially inner this side of mill, gap 16 radially outward narrows down along mill 2a, so that material enters the gap easily and pulverized effectively; And on the plane 22 Outboard Sections, gap 16 is constant, so that roll meticulous.

Mill 2a has a ring-type outstanding 24 to be fixed on the outer circumference of its upper surface adjacent grooves 4a, and protrusion 24 has the medial surface 26 of a circular arc, and medial surface hides and also blocks gap 16, flows out from gap 16 or misses to stop material effectively.Like this, just make that the material in space 16 keeps the long time in the outside on said plane 22, fine ground fully up to its quilt.

The embodiment of Fig. 3, its structure and Fig. 2 are similar.

Among Fig. 3, the cross section of the periphery surface of roller 6b is circular, has the radius of curvature 28 and the center of curvature 30, and the center of curvature 30 is positioned on the sagittal plane 22b of roller longitudinal center line.

Mill liner 12b has cannelure 4b on its upper surface, the cross section of groove 4b is circular, has the radius of curvature 32 and the center of curvature 34, and the center of curvature 34 also is positioned on the 22b of plane, and departs from the center of curvature 30 in the direction of leaving groove 4b.

In the side along mill 2b radial centripetal of plane 22b, the space between roller 6b and the groove 4b has formed first gap 36, and gap 36 narrows down gradually along the direction radially outward of mill 2b.

Formed second gap 38 between the roller 6b of the opposite side of plane 22b and groove 4b, it radially outward broadens gradually along mill 2b.Mill liner 12b has an annular projection 24b in the outer circumference of its upper surface adjacent grooves 4b.This projection 24b has an arc inner conical surface 26b, hides second gap 38, thereby has stopped that effectively material outflows from second gap 38 or misses.

The dilation 39 that second gap 38 forms, its two ends are all getting clogged.This dilation 39 has been full of a thick layer of material that has been pulverized.This effect of pulverizing certainly that has just improved material is so that roll meticulous.

Structure and Fig. 3 of the embodiment of Fig. 4 are similar.

Among Fig. 4, the cross section of the periphery surface 18c of roller 6c is circular, has radius of curvature 28c and center of curvature 30c, and center of curvature 30c is positioned on the sagittal plane 22c of longitudinal center line of roller.

Mill liner 12c has cannelure 4c on its upper surface, in the main region except that periphery area, its slot cross-section is circular, has radius of curvature 32c and center of curvature 34c, center of curvature 34c also is positioned on the 22c of plane, but departs from center of curvature 30c in the direction of leaving groove 4c.

At periphery area, the cross section of groove 4c has the radius of curvature 40 and the center of curvature 42.Radius of curvature 40 is less than the radius 28c of roller 6c.The center of curvature 42 is positioned in outer half one of axial direction of roller.So just formed the interior ring surface 26c of a circular arc, it is crooked and hide external series gap 38c between roller and the groove 4c to roller 6c.

In the embodiment of Fig. 5 and Fig. 6, edge mill comprises a rotating grinding board 2a, at its upper surface a cannelure 4d is arranged.

Mill 2d is equipped with several curved baffles or projecting block 24d in the outer circumference of adjacent grooves 4d, and as shown in Figure 6, every baffle plate 24d is installed in the upper surface of mill 2d, and can radially slides by by dovetail joint 44.

An arm of baffle plate 24d and bell crank lever 46 is connected, and on mill 2d, another arm of bell crank lever 46 is connected by an arm of a connecting rod 48 and another bell crank lever 50 bell crank lever 46 by pivotal support.This bell crank lever also is supported on the mill 2d.Another arm of bell crank lever 50 is connected with hydraulic pressure or electric drive 52 on being installed in mill 2d.Device 52 moves radially baffle plate 24d so that change the covering amount on the groove 4d.

Claims (1)

1, a kind of roll grinding machine that is used to pulverize material, form by a mill and at least one roller, said mill can be driven in rotation on this vertical axle of a foundation, and said mill can receive material in a central area round said axle, said mill has the upper surface of a basic horizontal, a cannelure has radially outward been located in said central area on said upper surface, this groove has the bottom surface of a bending, said roller has a rotating shaft, this rotating shaft intersects basically with said vertical axis above said upper surface, said roller extend in the said groove, the cross section of its outer periphery surface is crooked, when using said edge mill, make said mill and said roller turn, material just is diffused into by in the formed clearance space of said periphery surface and said bottom surface, and feature of the present invention is that the said upper surface of said mill in the neighboring of contiguous said groove has an annular outstanding, to block said clearance space.

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