A kind of vertical roll grinder
The present invention relates to a kind of vertical roll grinder, relate to a kind of vertical roll grinder that is applicable to the various material grindings of industry such as slag, slag, cement, metallic ore, nonmetallic ore, metallurgy, chemical industry specifically.
The complex structure of slag is the combination of iron and oxysome thereof and slag, and they mix each other, and very irregular, inhomogeneous.Because the complexity of slag structure needs with slag crushing after certain fineness the enrichment in grinding machine of the iron in the slag; Cause grinding efficiency to reduce; Energy consumption increases, and irregularly shuts down cleaning like Fruit grinder, and the problem of " crossing iron " can take place for crystal in the grinding machine or free iron; Even grinding machine is damaged, this causes grinding machine work continuity poor; The consumable accessory life-span is short, replacing is frequent, and running cost is high.Therefore, how to realize in the slag grinding process that be a world-class difficult problem separating of slag and iron always.
Very ripe at present Raymond mill, its structure is that bull ring is fixed, establishes rotatable main shaft in the middle of the bull ring; Establish quincunx support on the main shaft; Be hung with grinding roller through bearing pin on the support, rotation under the effect of frictional force and material resistance when grinding roller rotates with main shaft, charging aperture is positioned at the grinding machine middle part; Centrifugal force that produces when material is revolved round the sun by grinding roller and spring force acting in conjunction are pulverized down; Material after the pulverizing is brought powder selection device into by air-flow, and fine powder is taken out of outside the machine by air-flow after the classification, and Raymond mill is in a kind of being applicable to, the centrifugal milling equipment of softer material; Be applied to the slag grinding and have following defective: directly contact between (1) grinding roller and the bull ring and make the impulsive force increase, cause bull ring wearing and tearing aggravation; (2) grinding roller is installed in the grinding machine, and dust is bigger, and maintenance is difficulty relatively; (3) grinding power derives from the pressure of centrifugal force and spring, and pressure is inconvenient to regulate, to a lot of materials often grinding power seem not enough; (4) can't realize that slag iron separates, cause iron enrichment in mill, output reduces, and grinding roller and bull ring life-span are very low.
In the existing milling equipment, roller type vertical mill is a kind of more equipment that uses, and uses novel patent 201020262236.X to announce a kind of ultra-fine vertical flour mill; This equipment generally comprises a rotatable charging tray, and several and the grinding roller that the mill bowl cooperates are set above the mill bowl, and hydraulic cylinder links to each other through pull bar with grinding roller; Hydraulic cylinder is exerted pressure to grinding roller through pull bar, and charging aperture is positioned at grinding machine middle part, and material is broken under the extruding of mill bowl and grinding roller; Material after the pulverizing is brought powder selection device into by air-flow, and fine powder is taken out of outside the machine by air-flow after the classification, and this grinding machine efficiently solves the problem of Raymond mill insufficient pressure; But material is interior circulation; Iron particle can not in time be discharged, and the grinding useless power consumption is high, and grinding efficiency is still very low.
Why efficient is low for conventional mill; Key is to select the powder technology in the machine owing to having adopted, and this causes the iron of enrichment in the grinding machine to discharge, and this is the bottleneck of restriction grinding machine development; Therefore grinding machine will adapt to the characteristic of slag; This just requires grinding machine must be open type, outside grinding machine, selects powder and deironing, thereby realizes that slag iron separates.Chinese patent also discloses a kind of vertical roll grinder No. 99233773.9, and its mill bowl is installed in the machine, and is fixed; The mill bowl is inboard to be equipped with grinding roller through floral disc, rocking arm, hinge, and floral disc is contained on the bearing block through main shaft, when main shaft makes the floral disc rotation; Grinding roller rotates synchronously, and under the effect of friction and material resistance autobiography, charging aperture is positioned at grinding machine top; By the grinding roller crushing, the material after the pulverizing is through outside the bottom discharging opening discharge machine under the effect of grinding roller centrifugal force and spring force for material.This grinding machine is a kind of open type mill, has possessed machine and has selected powder, the outer deironing of machine outward, efficiently solves the problem of traditional Vertical Mill and the enrichment of Raymond mill iron particle, has improved grinding roller and the service life of grinding bowl.But also there is following problem in this grinding machine: (1) grinding roller is installed in the grinding machine, and dust is bigger, and work such as oiling and grinding roller positioning are essential shuts down; (2) grinding power derives from the pressure of centrifugal force and spring, and pressure is inconvenient to regulate, to a lot of materials often grinding power seem not enough; (3) material falls into from above, and discharge the bottom, and residence time of material is short, and powder formation rate is lower; (4) structural limitations its increase the possibility of grinding roller size.
Chinese patent 200720062976.7 discloses a kind of mortar flour mill that revolves, and Chinese patent 200720062500.3 discloses a kind of many wheel flour mills, and these two kinds of mill structure forms are consistent; All comprise a rotatable charging tray, several and the grinding roller that the mill bowl cooperates are set above the mill bowl, the uniform cloth of the grinding roller of rotation is in being fixed in the charging tray working chamber during work; The grinding roller bearing block is installed in top cover top, and the upper end of bearing block is connected with leading screw through bearing pin, and the adjustment nut of pressing spring and spring pressure adjustment nut and grinding roller is contained on the screw mandrel; Scraper plate is equipped with in charging tray bottom, during the slit of material between overground bowl and grinding roller, is rolled and is pulverized; This grinding machine has solved the problem of iron particle enrichment in the slag; It is little to have volume, and noise is little, advantages such as reduced investment.But there is following problem in this grinding machine: (1) its structural limitations the possibility of equipment enlarging; (2) grinding power derives from the pressure of spring, and the ore that suitable hardness is lower carries out grinding to slag, and it is not enough that grinding power seems; (3) bearing block of grinding roller is installed in the rocking arm cover at top, and bearing bears than macrobending stress, and bearing is prone to heating, and bearing is very short service life.
Summary of the invention
The present invention is in order to remedy the deficiency of prior art; Provide a kind of reliable installation that turns round, for ease of maintenaince, oiling is convenient, output is high, energy consumption is low a kind of large-scale vertical roll grinder; This grinding machine has that disposal ability is big, efficient is high, good seal performance, grinding power is adjustable, be easy to advantage such as maintenance, thoroughly solves technical barriers such as the enrichment of slag iron particle, grinding machine wearing and tearing height, overhaul of the equipments difficulty.
The present invention realizes through following technical scheme:
Vertical roll grinder of the present invention, its special character is: comprise the vertical main shaft that is installed on the body, the main shaft lower end connects reductor and motor successively; The mill bowl is installed in the main shaft upper end, several grinding rollers of mill bowl inside upper part contact, and grinding roller is installed on the grinding roller axle through bearing; The grinding roller axle is connected rocking arm one end; the rocking arm middle part is hinged on the body, the hinged hydraulic cylinder of rocking arm other end upper end, and the hydraulic cylinder lower end is installed on the body; the central feed tube of downward aligning mill bowl is arranged at the body top, is positioned at mill bowl below on the body and is provided with discharging opening.
The bus of grinding roller is parallel with the bus of mill bowl.
Body links to each other with base through bolt, and base is fixed on the concrete pedestal through foundation bolt.
The rubbing surface of grinding roller excircle is that upper base is big, the little conical surface of going to the bottom.
The contact position of mill bowl inwall and grinding roller is equipped with dismountable abrasion-proof backing block, and abrasion-proof backing block is fixed on the mill bowl through the liner plate pressing plate.
The bus of mill bowl and the angle of main shaft are 20～30 °, and the angle of abrasion-proof backing block and main shaft is 20～30 °.
Mill bowl inwall bottom is equipped with drapery panel, and the main shaft upper end that is positioned at the mill bowl is equipped with material distributing cone.
Mill bowl lower exterior has the material scraping plate that is installed on the body.
Oiling pipeline to the bearing oiling between grinding roller and the grinding roller axle is arranged in the grinding roller axle.
The present invention has the following advantages:
1. have very high adaptive capacity, the various materials below can the grinding tens of millimeters, grinding roller pressure adopts Driven by Hydraulic Cylinder, can carry out inorganic adjusting to grinding power.
2. motor adopts variable-frequency motor, can be through regulating the rotating speed of mill bowl, and the movement velocity of strict control material and the number of times that material is rolled control to optimum state to powder formation rate.
3. the bus of mill bowl and the angle of main shaft are 20～30 °, and this angle has guaranteed the time of staying of slag in grinding machine, has guaranteed best mill efficiency, prevents the idle work of slag process, the grinding phenomenon occurs.
4. grinding roller adopts oil sump lubricated, and grinding roller axle top has oil filler point, can under non-stop-machine state, carry out oiling work.
5. central feeding has avoided the side charging to produce the even phenomenon of bed of material became uneven, has improved the stability of grinding machine.
6. main shaft top is equipped with material distributing cone, and drapery panel is equipped with in mill bowl inside, and said structure makes that the bed of material on the mill bowl is even, has reduced the vibration that uneven inertia impact causes, has improved one-tenth powder efficient.
7. the abrasion-proof backing block of installing in the mill bowl adopts pressing plate to push down, and is for convenience detach.
8. through increase and decrease grinding roller number and grinding roller diameter, regulate different hydraulic couplings, this grinding machine can be designed to the grinding machine of different output as requested, can realize the maximization of grinding machine fully.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1, variable-frequency motor, 2, reductor, 3, shaft coupling, 4, main shaft, 5, the main shaft bearing block, 6, discharging opening; 7, base, 8, body, 9, hydraulic cylinder, 10, rocking arm, 11, breathe out Fu Gai, 12, the rocking arm cover; 13, central feed tube, 14, grinding roller, 15, the grinding roller axle, 16, material distributing cone, 17, drapery panel; 18, liner plate pressing plate, 19, abrasion-proof backing block, 20, the mill bowl, 21, material scraping plate, 22, concrete pedestal.
The specific embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
Vertical roll grinder of the present invention comprises the vertical main shaft 4 that is installed on the body, and the main shaft lower end connects reductor 2 and motor 1 successively; Mill bowl 20 is installed in the main shaft upper end, several grinding rollers 14 of mill bowl inside upper part contact, and grinding roller is installed on the grinding roller axle 15 through bearing; The grinding roller axle is connected rocking arm 10 1 ends; the rocking arm middle part is hinged on the body 8, the hinged hydraulic cylinder of the rocking arm other end 9 upper ends, and the hydraulic cylinder lower end is installed on the body; the central feed tube 13 of downward aligning mill bowl 20 is arranged at the body top, is positioned at mill bowl below on the body and is provided with discharging opening 6.
Body 8 connects into integral body through bolt and with base 7, and base 7 is installed on the concrete pedestal 22 through foundation bolt, and main shaft bearing block 5 is installed in organism bottom.Motor 1 is interconnected to drive unit with reductor 2, drives 4 rotations of grinding machine main shaft through yielding coupling 3; Main shaft 4 is installed on the main shaft bearing block 5, and main shaft bearing block 5 is installed on the base 7, and mill bowl 20 is installed on the main shaft 4; There are several grinding rollers with conical surface 14 mill bowl 20 tops, and conical surface upper base is big, it is little to go to the bottom, and the hydraulic cylinder 9 of the pressue device of each grinding roller 14 is installed on the body; Evenly cover 11 on the body 8 and be set with some rocking arms 10 with the Kazakhstan volt; Because adopted and breathed out volt and cover 11 fixing modes, rocking arm 10 is easy in grinding machine, to take out with grinding roller 14, the convenient maintenance; Every hinged hydraulic cylinder 9 of rocking arm 10 1 ends, the other end connects grinding roller 14, and the bus of grinding roller 14 is parallel with the bus of mill bowl 20; Place the grinding machine top in the central feed tube 13; Rocking arm cover 12 is fixing with grinding roller axle 15 through alignment pin; Grinding roller axle 15 is connected with grinding roller 14 through bearing, and in the grinding machine motion process, grinding roller axle 15 does not change; Grinding roller 14 rotations; Advantage is that the bending stress that receives of rocking arm and grinding roller bearing is little, and the bearing long service life between grinding roller and the grinding roller axle is superior to bearing is installed to the structure of rocking arm cover the inside.
Be positioned at mill bowl below on the body and be provided with discharging opening, discharging opening 6 links together through bolt and the main shaft bearing block 5 that is fixed on the body; Contact position with grinding roller in the mill bowl is equipped with dismountable abrasion-proof backing block; Abrasion-proof backing block 19 is tile-shaped; Through liner plate pressing plate 18 abrasion-proof backing block 19 is fixed to the inwall that grinds bowl 20, the bus of mill bowl and the angle of main shaft are 20～30 °, and abrasion-proof backing block 19 is 20～30 ° with the angle of main shaft.Mill bowl 20 inside bottom are equipped with removable drapery panel 17; Main shaft 4 tops that are positioned at the mill bowl are equipped with material distributing cone 16; Fall material distributing cone 16 from the material that central feed tube 13 is come in, be slipped to mill bowl 20 bottoms, evenly dished out by drapery panel 17; Grind in the slit that makes material evenly get between mill bowl 20 and the grinding roller 14, has guaranteed the stability of grinding machine.The mill bowl is installed in dismountable material scraping plate 21 on the body below 20 outsides, and the assurance material is discharged grinding machine smoothly.
Have the oiling pipeline in the middle of on the grinding roller axle 15, give the bearing oiling between grinding roller and the grinding roller axle, can carry out oiling, and bearing is dipped in the oil sump, improved the working environment of bearing, improved the lubricant effect of bearing greatly in stopped status not.
Of the present invention should example slag (being not limited to slag) micro mist special vertical roller mill;, domestic and international various grinding machines (Vertical Mill, many disc sharpeners, broad sense mill, ball mill, roller mill for sleeping in, Raymond mill) develop after being investigated; This mill is the special-purpose grinding machine of a kind of slag to the characteristics exploitation of the difficult mill of slag; Same this grinding machine also is highly suitable for the various materials of industries such as metallic ore, nonmetallic ore, metallurgy, slag, chemical industry; This grinding machine to the powder formation rate of finished product 400 purpose slag micro powders up to 20%, ton power consumption less than 40 degree/tons, this example slag micro powder special vertical roller mill is tried out; The proving effect highly significant is a first-selected product of producing slag micro powder.