CN2250808Y

CN2250808Y - Vertical roller mill

Info

Publication number: CN2250808Y
Application number: CN 96234308
Authority: CN
Inventors: 夏纪勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-16
Filing date: 1996-02-16
Publication date: 1997-04-02
Anticipated expiration: 2006-02-16

Abstract

The utility model relates to a vertical roller mill, which is composed of a transmission device, a feeding device, and a working chamber. The vertical roller mill is characterized in that rotor disks in the working chamber are connected with a main shaft driven by the transmission device through keys; a roller shaft is arranged between every two rotor disks through a positioning shaft; the roller sheathed on the roller shaft can roll along the internal wall of the casing of the working chamber, and the roller can drive a cover on the roller shaft to rotate. The utility model reduces the journal friction between the roller and the roller shaft and the end surface friction among the roller and the rotor disks, so the power consumption is greatly reduced, the amplitude is reduced, the mounting and the dismounting are convenient, the positioning is stable and reliable, and the milling efficiency is high.

Description

Vertical roller mill

The utility model relates to a kind of dry method grinding device that is used for the various materials of industry such as chemical industry, building materials, mine, the energy.

Material dry method milling equipment mainly contains ball mill, Raymond mill, impact mill, Vertical Mill etc. at present.The Vertical roller mill operation principle is similar to Raymond mill, and its basic principle is that roller gets rid of to the working chamber inwall under centrifugal action, makes material be pulverized the centrifugal force that its crushing force produces around main axis rotation from roller between roller and working chamber inwall.More domestic in recent years scientific researches, production unit have been developed a kind of ring roller mill, be vertical structure, transmission device is on machine top, make main axis rotation, and main shaft is by the several rotor disks of key connecting, be evenly equipped with the hole that can pass roller axle on the rotor disk, each roller axle runs through all rotor disks from top to bottom, and keeps the assembly relation of matched in clearance with hole on the rotor disk.On roller axle, be with roller, roller axle is an optical axis, when rotor disk during with main axis rotation, the roller that sky is enclosed within on the roller axle gets rid of to the working chamber inwall, under the moment of friction effect roller is relatively rotated on roller axle, the principal character of this grinding machine is that roller axle is fixed on the rotor disk, assembles the latter two with can not relative motion, roller and roller axle during work, rotor disk relatively rotates.But there is following distinct disadvantage: 1. sharply wear and tear with contacted position of roller and roller endoporus owing to the sliding friction that relatively rotates generation between roller and the roller axle makes on the roller axle, even produce gummed, cause roller axle and roller to lose efficacy because of inordinate wear soon; 2. because of roller is directly to be placed on the rotor disk, during work and rotor disk have serious end-face friction, both consumed power influenced grinding effect owing to resistance is difficult to normal rotation more greatly again; 3. because roller axle all has the requirement of cooperation with each rotor disk that it passes, so assembling is extremely inconvenient, simultaneously this assembly relation makes every grade the roller axle radius of gyration all identical and can not pulverize the relevant technologies parameter that requires adjust the most suitable this grade operating mode according to the difference of every stage material, thereby reduces mill efficiency.

The purpose of this utility model is to overcome above-mentioned defective, provides a kind of grinding effect good, and economize on electricity is is significantly installed and removed conveniently the Vertical roller mill of long service life.

The utility model is a kind of Vertical roller mill, by transmission device, charging gear, working chamber is formed, it is characterized in that in the described working chamber, more than 2 or 2 and the rotor disk (4) that is provided with locating hole connect with main shaft (1) by key (8) by the transmission device drive, roller axle parts (3) place between the rotor disk (4) by locating shaft (21) or (31), roller (6) is placed in and overlaps on (23) or (35) and by its picking-up outside the roller axle parts (3), rotor disk (4) is with main shaft (1) rotation, and roller (6) rolls and drives along housing (5) inwall and overlaps (23) or (35) rotation outside the roller axle (3).

In addition, roller axle parts of the present utility model (3) also can be provided with locating shaft (21), eccentric bushing (22) endoporus and its matched in clearance and relatively rotate or swing, and overcoat (23) is by bearing (24) radial location, and the lower end is with end cap (25) axial location.

Cover (35) can be provided with sealing at locating shaft (31) upper bearing (metal) two ends by bearing (34) and end cap (38) location outside the roller axle parts of the present utility model (3), and the motionless locating shaft (31) of overcoat free to rotate (35) and relative rotor disk (4) is concentric.

Rotor disk of the present utility model also can be provided with convex shoulder on (4), and card is established the roller axle locating hole of adjacent two-stage correspondence.

The utility model has thoroughly changed the roller axle structure, makes roller in the ring type mill and the journal friction between the roller axle, and end-face friction reduces to almost nil between roller and rotor disk, and power consumption is reduced significantly, and roller and roller axle life-span improve greatly.Secondly this device has changed the structure and the locate mode thereof of rotor disk, thus make roller level and inter-stage be staggeredly arranged make material grinding evenly and mounting or dismounting make things convenient for, the rotor disk positioning stablity is reliable.The 3rd, the radius of gyration of every grade of roller axle and roll size can be adjusted according to raw meal particle size at the corresponding levels and technological requirement.

Fig. 1 is the utility model working chamber structural front view;

Fig. 2 is the utility model working chamber vertical view;

Fig. 3 is the utility model roller axle modular construction figure;

Fig. 4 is the another kind of form structure figure of the utility model roller axle parts;

Fig. 5 is the utility model rotor disk structure chart.

Below in conjunction with accompanying drawing in detail the utility model course of work is described in detail.

The utility model mainly is made up of transmission device, charging gear, working chamber three parts.Feed part and transmission device are prior art, and not expression all is positioned at working chamber top among the figure, and transmission device also can place the working chamber bottom.As shown in Figure 1, the Vertical roller mill working chamber is mainly by main shaft 1, transmission feed part connecting plate 2, compositions such as roller axle 3, rotor disk 4, housing 5, roller 6.Rotor disk 4 is used for fixing roller axle 3 and material is distributed equally, and is connected in main shaft 1 by key 8, makes axial location by roller axle 3, and the orlop rotor disk is by limit screw 7 lockings; Roller 6 is the annulus of wear and shock-resistant, is one of main powder grinding medium; Housing 5 inwalls adopt high-abrasive material, outer wall to have to add a layer water jacket, make the machine cooling in order to water flowing.Roller axle 3 is evenly equipped with array at every grade, and the locating shaft of assembling back roller axle is relative with rotor disk motionless, and its overcoat can rotate relative to rotor disk 4.When main shaft drives rotor disk 4 rotations, but be placed in not only rotation but also can revolve round the sun and fricton-tight friction of its outer roller that puts 6, their the cylindricals by its locating shaft two ends and the shaft shoulder are in 4 location of rotor disk.

As seen from Figure 2, transmission device makes main shaft 1 rotation, and main shaft drives rotor disk and rotates synchronously, and angular speed is W ₀Roller gets rid of to inner walls under centrifugal action, and under moment of friction and material drag effect, with the angular speed rotation of W ', the roller of rotation drives the roller axle overcoat again and rotates with angular speed W.After material enters working chamber from material inlet A, on the rotor disk 4 of first order upper end, got rid of to housing 5 inwalls by centrifugal action, crushed by roller 6 or grind, in dropping process, rolled repeatedly subsequently, material can directly use or send the grader classification after B gets rid of.

Fig. 3 is a kind of structural shape of the utility model roller axle parts.Its structure is for having eccentric overcoat, locating shaft 21 transferring power and motion, be circular multidiameter, circle is located on rotor disk 4 with the shaft shoulder outside the two ends, and eccentric bushing 22 endoporus and its matched in clearance can be done relative swing with locating shaft 21, still can keep bigger crushing force after making housing 5 inwalls and roller 6 wearing and tearing, the main effect of overcoat 23 is that roller 6 is overlapped thereon with its picking-up, when roller 6 rotations, and 21 rotations of their relative positioning axles.Establish bearing 24 between overcoat 23 and the eccentric bushing 22, make axial location and with

seal

28,29 sealing with end cap 25, wear washer 212 places between locating shaft 21 and the eccentric bushing 22 corresponding seams, rise and support whole rotatable parts weight, reduce the effect of rotary resistance between the two, seal 210,211 enters between locating shaft 21 and the eccentric bushing 22 in order to prevent dust.Roller 6 endoporus and roller axle 3 cylindrical gaps are less when adopting this structure, therefore beat and impact also little.

Fig. 4 is the another kind of pattern of roller axle, its structure is not established eccentric bushing, all rotary parts are all concentric with locating shaft 31, labyrinth bush 32 endoporus and locating shaft 31 adopt interference fits, maze trough has been cut on top, the sealing of corresponding formation with overcoat 35 grooves enters bearing 34 to stop dust from the top, 35 the seal 33 main effects of inserting are dustproof and prevent that lubricating grease from leaking.Overcoat 35 effect is identical with axle sleeve 23 effects, and end cap 38 is used for making bearing 34 to make axial location, inserts that seal 36 backs are dustproof to be entered bearing 34 and prevent the lubricating grease leakage from the below.

Know that by Fig. 5 rotor disk 4 upper ends are provided with convex shoulder, are connected (not drawing among the figure) with flange.The utility model adopts multilevel grinding, and pack into roller group and roller axle of two 4 of rotor disks just forms the one-level operating room.Therefore rotor disk 4 hole counts in the middle of placing are adjacent secondary roller axle number sum, make roller 6 interlaced arrangement can increase grinding effect like this, make roller axle not at the same level that the different radius of gyration can be arranged, according to different adjustable roller of every stage material granularity 6 sizes, also be convenient to the dismounting of roller axle 3 simultaneously.

Claims

1. Vertical roller mill, by transmission device, charging gear, working chamber is formed, it is characterized in that in the described working chamber, more than 2 or 2 and the rotor disk (4) that is provided with locating hole connect with main shaft (1) by key (8) by the transmission device drive, roller axle parts (3) place between the rotor disk (4) by locating shaft (21) or (31), roller (6) is placed in and overlaps on (23) or (35) and by its picking-up outside the roller axle parts (3), rotor disk (4) is with main shaft (1) rotation, and roller (6) rolls and drives along housing (5) inwall and overlaps (23) or (35) rotation outside the roller axle (3).

2. Vertical roller mill according to claim 1, it is characterized in that roller axle parts (3) establish locating shaft (21), eccentric bushing (22) endoporus and its matched in clearance and relatively rotate or swing, overcoat (23) be by bearing (24) radial location, and the lower end is with end cap (25) axial location.

3. Vertical roller mill according to claim 1, it is characterized in that cover (35) is by bearing (34) and end cap (38) location outside the roller axle parts (3), be provided with sealing at locating shaft (31) upper bearing (metal) two ends, the motionless locating shaft (31) of overcoat free to rotate (35) and relative rotor disk (4) is concentric.

4. Vertical roller mill according to claim 1 is characterized in that establishing convex shoulder on the rotor disk (4), and card is established the roller axle locating hole of adjacent two-stage correspondence.