CN103706449B - A kind of small negative pressure airflow milling with ellipsoid structure crushing chamber - Google Patents
A kind of small negative pressure airflow milling with ellipsoid structure crushing chamber Download PDFInfo
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- CN103706449B CN103706449B CN201310740411.XA CN201310740411A CN103706449B CN 103706449 B CN103706449 B CN 103706449B CN 201310740411 A CN201310740411 A CN 201310740411A CN 103706449 B CN103706449 B CN 103706449B
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Abstract
The invention discloses a kind of small negative pressure airflow milling with ellipsoid structure crushing chamber, comprise gathering-device, motor, controlling organization, efferent duct, feeding device; Also comprise negative pressure device, airslide disintegrating mill; Output device is communicated with airslide disintegrating mill by efferent duct; Airslide disintegrating mill is provided with the crushing chamber of part ellipsoidal shape, and the transverse two ends of a crushing chamber cross section are provided with air-flow admission passage; Material adds in airslide disintegrating mill by feeding device; Motor connects the classification mechanism of airslide disintegrating mill by belt wheel mechanism; Efferent duct is connected with the top of airslide disintegrating mill; Gathering-device is connected with efferent duct; Under the control of controlling organization, material adds in the crushing chamber of airslide disintegrating mill by feeding device, the air-flow flowed into from air-flow admission passage is pulverized material, negative pressure device makes to produce pressure along material and gas circulating direction in efferent duct, makes the material after pulverizing output to gathering-device through efferent duct.
Description
Technical field
The present invention relates to size reduction machinery, refer to a kind of small negative pressure airflow milling with ellipsoid structure crushing chamber especially.
Background technology
Airflow milling utilizes air-flow to carry out a kind of visual plant of micron-class superfine pulverizing to material, is widely used in the ultra-fine grinding of nonmetallic mineral and industrial chemicals.Airflow milling generally comprises source of the gas, raw material cabin, pulverizing chamber, grading wheel, the structures such as dust cell phone system, its operation principle is that gases at high pressure are accelerated into high velocity air by nozzle, this air-flow injects pulverizing chamber, feed particulate material in pulverizing chamber is clashed into mutually, collision friction, thus by crushing material, simultaneously, after pulverizing, particle enters graded region under the drive of air-flow, under the centrifugal action that the grading wheel of High Rotation Speed produces, carry out thickness grading, the fine grained meeting granularity requirements is discharged outside airflow milling, not yet reach the raw material pulverizing requirement and return continuation pulverizing in pulverizing chamber again.
The airflow milling of prior art, has many-sided shortcoming.
First, the airflow milling of prior art is bulky, and the occasion that being not suitable for laboratory etc. needs miniature air stream to grind uses.Due to such as, in some occasion, laboratory, scientific research institution etc., need to carry out ultra-fine grinding to a small amount of material, in prior art, most airflow milling is due to bulky and can not be suitable for.
Secondly, the airflow milling crushing chamber structure of prior art is asymmetric, causes internal gas flow to flow uneven, thus the pulverized particles size exported is uneven, is difficult to meet the requirement of the projects such as scientific research to particle degree of grinding.
Summary of the invention
In view of this, the object of the invention is to propose a kind of small negative pressure airflow milling with ellipsoid structure crushing chamber.This small negative pressure airflow milling with ellipsoid structure crushing chamber is more suitable for the occasion that laboratory etc. needs a small amount of crushing material.
Based on the above-mentioned purpose small negative pressure airflow milling with ellipsoid structure crushing chamber provided by the invention, comprise gathering-device, motor, controlling organization, efferent duct, feeding device, also comprise negative pressure device, airslide disintegrating mill; Pulverizer; Described gathering-device is communicated with described airslide disintegrating mill by described efferent duct; Described airslide disintegrating mill is provided with the crushing chamber of part ellipsoidal shape, and the transverse two ends of a described crushing chamber cross section are provided with air-flow admission passage; Material adds in described airslide disintegrating mill by described feeding device; Motor connects the classification mechanism of described airslide disintegrating mill by belt wheel mechanism; Described efferent duct is connected with the top of described airslide disintegrating mill; Described gathering-device is connected with described efferent duct; Under the control of described controlling organization, material adds in the crushing chamber of described airslide disintegrating mill by described feeding device, the air-flow flowed into from described air-flow admission passage is pulverized described material, described negative pressure device makes to produce pressure along material and gas circulating direction in described efferent duct, makes the material after described pulverizing output to described gathering-device through described efferent duct.
Preferably, described ellipsoid shape refers to meet formula in cartesian coordinate system:
shape.
Optionally, described airslide disintegrating mill also comprises the adapter cavity be connected with described crushing chamber and the classification chamber be connected with described adapter cavity; Described classification chamber is circular; The cross section that described adapter cavity is connected with described crushing chamber is for oval, and the cross section that described adapter cavity is connected with described classification chamber is for circular.
Optionally, also comprise classification mechanism, described efferent duct is communicated with described airslide disintegrating mill by described classification mechanism.
Optionally, described crushing chamber bottom surface is provided with the lower nozzle that air-flow enters.
Optionally, described air-flow admission passage extends, to the elliptic focus place of respective cross section to crushing chamber inside.
Optionally, described air-flow admission passage is Lavalle gas nozzle.
Optionally, described classification mechanism comprises grading wheel; Described grading wheel has the inner chamber be communicated with described efferent duct.
Optionally, described classification mechanism comprises turbine clasfficiator.
Optionally, the described grading wheel classification part that comprises interconnective wheel shaft and be connected with wheel shaft bottom; Described wheel shaft is hollow tubular, stretches out outside described airslide disintegrating mill, is set in an outer sleeve by two bearings and a bottom bracket axle; Described classification part comprises columniform inner chamber, is arranged in described airslide disintegrating mill; Described wheel shaft one end and described inner space, the other end is communicated with described efferent duct.
Optionally, described classification part comprises circular upper base, circular go to the bottom and one be blade; The circumference that described blade connects described upper base and goes to the bottom, surrounds into cylindrical cavity with described upper base with going to the bottom; Be provided with manhole in the middle part of described upper base, described wheel shaft is communicated with described cavity by this through hole.
Optionally, described a series of blade spaced set.
Optionally, described classification mechanism also comprises lower ball cover, outer sleeve, upper ball cover, caping, belt wheel, ring flange; Described two bearings are arranged at described outer sleeve two ends respectively, and described in described lower ball cover shutoff, outer sleeve is close to one end of described classification part, the outer sleeve other end described in described upper ball cover shutoff, and described bottom bracket axle is arranged between described two bearings; Described caping connects described upper ball cover, is connected with described ring flange flange simultaneously; Described belt wheel is fixed on described wheel shaft, drives described wheel shaft to rotate; Described ring flange is set in described wheel shaft.
Optionally, described ring flange is hubbed clip-on-welding flange, comprises the first flange, neck and the second flange; Described neck is stepped, and ladder bottom is greater than top internal diameter, and its location is connected with described second flange, and its top is connected with described first flange; Outstanding and be connected with described wheel shaft with the interface that described wheel shaft matches to neck interior in the axial direction with the neck sidewall that described first flange is connected; Belt wheel described in the neck side walls enclose that described first flange connects, which is provided with opening, makes at least one conveyer belt connect described belt wheel and described motor through described opening.
Optionally, described opening is provided with two.
Optionally, the angle between described two opening axis is no more than 180 °.
Optionally, the degree of depth of described crushing chamber, namely crushing chamber is 50-90mm along the length in direction, described airslide disintegrating mill axis.Concrete, can be 50-60mm or 60-70mm or 70-80mm or 80-90mm.
Optionally, described efferent duct is equal diameter pipe, and its internal diameter is 5-30mm.
Optionally, described negative pressure device is gas transport pump.Concrete, can be minipump or aspiration pump or gas circulator.
Optionally, described classification chamber internal diameter is 100-200mm.
Optionally, described crushing chamber is oval in the cross section of itself and air-flow admission passage junction, and the minor axis length of this ellipse is more than 1 times of described air-flow admission passage internal diameter.Preferably, can be 1.2-3 times.
Optionally, described air-flow admission passage inwall comprises two sections of conical pipes, and one end that these two sections of conical pipes are less is interconnected, and forms Laval nozzle.
Optionally, coaxially arrange material admission passage in described air-flow admission passage, material is added in crushing chamber by described material admission passage by described feeding device.
Optionally, the outlet of described material admission passage is positioned at the throat of described Laval nozzle.
Optionally, described bearing is rolling bearing.It can be specifically deep groove ball bearing.
Optionally, on the second flange of described upper ball cover, caping and ring flange, corresponding position is provided with screwed hole, and three is connected by threaded fastener.
Optionally, the wheel shaft of described classification part is connected by the interface cooperatively interacted with ring flange neck.
Optionally, lubricating layer is provided with between the interface cooperatively interacted described in.Described lubricating layer can comprise lubricating oil or ball.
As can be seen from above, the small negative pressure airflow milling with ellipsoid structure crushing chamber provided by the invention, has less structure, is applicable to the occasion that laboratory etc. needs a small amount of comminuting matter; Airflow milling provided by the present invention, has the crushing chamber of part ellipsoidal shape, when meeting air-flow and pulverizing material, further reduces the gross space shared by airflow milling simultaneously, makes it more be applicable to the occasion of the needs miniature air stream mills such as laboratory.In addition, the airflow milling of the embodiment of the present invention, its grading wheel is provided with the inner chamber connected with efferent duct, the classification part of grading wheel is arranged in classification chamber, and adopt the inner chamber of pipeline communication classification part and the efferent duct of material, thus the air ventilation passage structure integrated symmetric of airslide disintegrating mill, the circulation of gas and material is more stable, thus the airslide disintegrating mill of the embodiment of the present invention has more stable duty, its service life is corresponding prolongation also.The embodiment of the present invention adopts negative pressure device, in efferent duct, produce pressure along the direction of gas and Flow of Goods and Materials, and the material contributing to reaching pulverizing requirement screens in time from airslide disintegrating mill discharges.
Generally speaking, the small negative pressure airflow milling tool of what the present invention and embodiment provided have ellipsoid structure crushing chamber has the following advantages:
First the volume requirement of laboratory to airflow milling can be met;
Secondly, it has axiolitic crushing chamber, and this crushing chamber and gas flow trace adapt, and can reduce the volume of crushing chamber when not affecting crushing effect;
3rd, its symmetrical configuration, avoids the gas flowing instability caused because structure is asymmetric, makes the pulverized particles of output more even;
4th, the gas inlet passages of its crushing chamber both sides extends to the elliptic focus position in ellipsoid cross section, and the material that a gas inlet passages jet is accelerated just in time can export out accelerated at the gas inlet passages of offside, improves crush efficiency;
5th, be also provided with gas inlet passages on the downside of its crushing chamber, send jet from top to bottom, can assist to push the material after pulverizing and enter classification chamber;
6th, there is negative pressure device, contribute to the output of crushing rear material;
7th, there is the classification mechanism of special construction, the symmetric design of crushing chamber can be realized.
Accompanying drawing explanation
Fig. 1 is the airflow milling overall structure schematic diagram of the embodiment of the present invention;
Fig. 2 A is the airflow milling overall structure schematic diagram of another embodiment of the present invention;
Fig. 2 B is the airflow milling overall structure schematic diagram of the preferred embodiment of the present invention;
Fig. 3 is the airslide disintegrating mill schematic diagram of the embodiment of the present invention;
Fig. 4 A is embodiment of the present invention crushing chamber cross sectional representation;
Fig. 4 B is preferred embodiment of the present invention crushing chamber cross sectional representation;
Fig. 5 is the classification mechanism structural representation of the embodiment of the present invention;
Fig. 6 is the upper ball cover structural representation of the embodiment of the present invention;
Fig. 7 is the flange plate structure schematic diagram of the embodiment of the present invention;
Fig. 8 is the grading wheel structural representation of the embodiment of the present invention;
Fig. 9 is the structural representation in another orientation of ring flange of the embodiment of the present invention;
Figure 10 is the Laval nozzle schematic diagram of the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 is the chamber small negative pressure airflow milling overall structure schematic diagram with the pulverizing of ellipsoid structure of the embodiment of the present invention.Comprise gathering-device 1, negative pressure device 2, feeding device 3, efferent duct 4, support 5, motor 6, controlling organization 7, bearing 8, airslide disintegrating mill 9.Gathering-device 1 is communicated with airslide disintegrating mill 9 by efferent duct 4.Feeding device 3 comprises at least one hopper, and this hopper is connected by the crushing chamber of pipeline with airslide disintegrating mill 9, and described crushing chamber inside is provided with classification mechanism, is connected with air inlet pipe bottom it.Be provided with belt wheel mechanism in support 5, motor 6 connects described classification mechanism by described belt wheel mechanism.Bearing 8 is for supporting whole airflow milling.Controlling organization 7 pairs of motors 6, airslide disintegrating mill 9 control.
Material is by the hopper of described feeding device 3, add in the crushing chamber of airslide disintegrating mill 9 through corresponding material admission passage, under the control of controlling organization 7, the gas of Supersonic Flow enters in described crushing chamber to be pulverized described material, forms material powders.Motor 6 drives the classification mechanism in airslide disintegrating mill to carry out classification to described material powders by the described belt wheel mechanism in support 5, is outputted in gathering-device 1 by efferent duct 4.
Negative pressure device 2 is arranged on the receiving flask of gathering-device 1 lower end, is connected by electric wire with between controlling organization 7, carries out opening and closing and provide power supply for it by controlling organization 7.Negative pressure device 2 plays swabbing action, makes in efferent duct 4, produces suction along from airslide disintegrating mill 9 to the direction of gathering-device 1, sucks in airslide disintegrating mill 9 in gathering-device 1 through pulverizing the material particles after also classification.
Negative pressure device 2 is gas transport pump, can be specifically minipump, aspiration pump, gas circulator etc.In the present embodiment, steady and unimpeded in order to ensure that material particles is carried, efferent duct 4 is equal diameter pipe, and its internal diameter is about 5-30mm.
In other embodiments, in order to ensure the unimpeded of mass transport, the turning point of described efferent duct is set to arc-shaped, as shown in Figure 2 A.In other embodiment, described efferent duct can be arc shape pipeline.Airslide disintegrating mill in the ordinary course of things bottom bilateral symmetry position is provided with two air-flow admission passages, as Fig. 2 A.In other embodiments of the invention, an air-flow admission passage can be set in crushing chamber lower central, namely descend nozzle, send jet from bottom to top, as shown in Figure 2 B.
Fig. 3 is airslide disintegrating mill 9 structural representation of the embodiment of the present invention.This airslide disintegrating mill 9 comprises air-flow admission passage 91, crushing chamber 92, adapter cavity 93, classification chamber 94, has classification mechanism 95 part to be arranged in classification chamber 94, and described efferent duct is connected by this classification mechanism and is communicated with described airslide disintegrating mill.Granular material to be comminuted enters the inner chamber of airslide disintegrating mill 9 from the feeding device 3 shown in Fig. 1, falls into crushing chamber 92, and jet flows into from air-flow admission passage 91, described granular material is clashed into mutually and then pulverizes to form material powders.Material powders, under the impetus of described supersonic airstream and the negative-pressure ward effect of described negative pressure device, enters classification chamber 94 and carries out classification by grading plant.As shown in Figure 3, crushing chamber 92 shape is roughly an axiolitic part, and air-flow admission passage 91 is arranged on crushing chamber 92 sidewall, and symmetrical about crushing chamber 92 axis.Preferably, described ellipsoid refers to meet formula in cartesian coordinate system:
shape.In the present embodiment, the degree of depth of crushing chamber 92, namely crushing chamber 92 is 50-90mm along the length in the direction, airslide disintegrating mill axis of the present embodiment, concrete, can be 50-60mm or 60-70mm or 70-80mm or 80-90mm.The degree of depth of adapter cavity 93, namely adapter cavity 93 along the length in the direction, airslide disintegrating mill axis of the present embodiment be the 1.5-2 of crushing chamber 92 doubly.The degree of depth in classification chamber 94, namely classification chamber along the length in the direction, airslide disintegrating mill axis of the present embodiment be the 0.7-1.6 of adapter cavity 93 length doubly, thus when not taking too much space, material compound being pulverized standard is promptly separated in time.In the present embodiment, classification chamber 94 is cylindrical cavity, and its internal diameter is 100-200mm.
Fig. 4 A is the crushing chamber cross sectional representation of the embodiment of the present invention, i.e. A-A direction sectional view.As shown in Figure 4, crushing chamber 92 is part ellipsoidal shape, and namely the shape of crushing chamber 92 is a part for ellipsoid, and its cross section is oval, and air-flow admission passage is arranged at the major axis two ends of a crushing chamber cross section ellipse; Preferably, described air-flow admission passage to be arranged in the middle part of crushing chamber and to be positioned at the transverse two ends of crushing chamber cross section.Preferably, described air-flow admission passage extends to crushing chamber inside, at the elliptic focus place of respective cross section.Because supersonic airstream injection track and axiolitic crushing chamber adapt to more, thus compared to existing technology, the part ellipsoidal shape crushing chamber of the present embodiment can adapt to gas flowing, described part ellipsoidal shape better, mainly refers to the shape obtained ellipsoid cutting perpendicular to a certain axis of ellipsoid; In certain embodiments, described part ellipsoidal shape can be semielliptical shape, 1/3rd ellipsoid shapes or 2/3rds ellipsoid shapes.The present embodiment adopts the crushing chamber of part ellipsoidal shape, improves space availability ratio, makes crushing chamber 92 also can meet the demand of equipment to comminuting space when small volume; Cavity inner wall rounding off, be conducive to the circulation of powder and gas, thus material is not easily at the dead angle acumulation of described crushing chamber simultaneously.
In certain embodiments, air-flow admission passage extends to crushing chamber inside, to the elliptic focus place of corresponding crushing chamber cross section, as shown in Figure 4 B.Adopt this design, make the material particles speed difference of shock mutually in crushing chamber larger, thus there is the crush efficiency of better crushing material effect and Geng Gao.
In the present embodiment, crushing chamber 92 is more than 1 times of air-flow admission passage 91 internal diameter in the minor axis length of A-A section, and preferably, described crushing chamber 92 is 1.2-3 times of air-flow admission passage 91 internal diameter in the minor axis length of A-A section.Crushing chamber 92 adopts this design, makes, when not affecting raw material and pulverizing, to decrease the overall dimensions of airslide disintegrating mill.
In the present embodiment, described adapter cavity connects described crushing chamber and described classification chamber, and its lower surface is ellipsoid, coordinates with the upper surface of described crushing chamber; Described adapter cavity upper surface is disc, coordinates with the lower end in described classification chamber.
In the present embodiment, the Nell wall of described air-flow admission passage 91 comprises two sections of conical pipes, and one end that these two sections of conical pipes are less is interconnected, one section of contraction, another section is expanded, and forms Laval nozzle, as shown in Figure 10, make air-flow admission passage 91 first shrink on air current flow direction to expand afterwards.
In other embodiments, can coaxially arrange material admission passage in described air-flow admission passage, material is added in crushing chamber by described material admission passage by described feeding device.
In other embodiments, described crushing chamber bottom can arrange air-flow and enter lower nozzle, this lower nozzle provides a jet upwards, when pulverized material density is comparatively large and negative pressure device suction force is not enough, the supersonic gas that this lower nozzle sprays upwards pushes material, contribute to material to discharge through classification chamber, be collected device and collect.
Fig. 5 is classification mechanism 95 structural representation of the embodiment of the present invention.The classification mechanism of the present embodiment is turbine clasfficiator, and a part is arranged in classification chamber, and another part is arranged at outside described classification chamber; Comprise grading wheel 51, lower ball cover 52, outer sleeve 53, upper ball cover 54, caping 55, belt wheel 56, ring flange 57.The classification part that grading wheel 51 comprises interconnective wheel shaft and is connected with wheel shaft bottom, described wheel shaft is set in an outer sleeve 53 upward, is provided with two bearings, in the present embodiment between described wheel shaft and outer sleeve 53 inwall, these two bearings are rolling bearing, can be specifically deep groove ball bearings.Described wheel shaft is the tubulose of hollow, and its internal diameter is not less than the internal diameter of foregoing efferent duct.Described classification part is cylindric, comprises the identical circular upper base of diameter and goes to the bottom; A series of equally spaced blade shroud, around described upper base and the periphery of going to the bottom, surrounds into the cavity of a cylinder with described upper base with going to the bottom; Be provided with manhole in the middle part of described upper base, this hole size and described wheel shaft internal diameter size adapt, and make described wheel shaft by this through hole and described upper base, to go to the bottom and cavity that a series of blade shroud is coiled into is communicated with.Due to the speed that gas circulates in airslide disintegrating mill, connected the side of the efferent duct of material from crushing chamber, cause the stressed instability of whole device, cause fluctuation of service in prior art, whole airslide disintegrating mill easily damages simultaneously.And classification mechanism of the present invention adopts this design, make air ventilation passage structure integrated symmetric in airslide disintegrating mill, thus gas and material stream passed more stable, the life-span also corresponding prolongation of airslide disintegrating mill.
Lower ball cover 52 is set on outer sleeve 53, contacts with described classification part.A upper ball cover 54 as shown in Figure 6; This upper ball cover 54 is set with on described wheel shaft, is connected with described outer sleeve 53 sidewall by securing members such as bolts.Described two bearings are arranged at two ends inside outer sleeve 53, and lower ball cover 52 and upper ball cover 54 are respectively used to block two described bearings.Upper ball cover 54 as shown in Figure 6 connects in the one side of outer sleeve 53 at it and is provided with two sections of outstanding sidewalls, and the position of these two sidewalls is corresponding with the inner ring of described bearing and position, outer ring respectively in the assembled state.Meanwhile, between described two bearings, be provided with bottom bracket axle, described bearing, bottom bracket axle are all set on the wheel shaft of described grading wheel 51, are between described outer sleeve 53 inwall and described wheel shaft outer wall.Caping 55 and belt wheel 56 is disposed with on upper ball cover 54.In the present embodiment, the structure of ring flange 57 as shown in Figure 7, is hubbed clip-on-welding flange, comprises the first flange 571, neck 572 and the second flange 573.First flange 571, second flange 573 is separately positioned on neck 572 two ends.Neck 572 is stepped, and under assembled state, bottom internal diameter is greater than top internal diameter; Second flange 573 external diameter is substantially equal with the external diameter of caping 55, is connected to the ladder bottom of neck 572; First flange 571 is connected to the ladder top of neck 572.On second flange 573, caping 55 edge, upper ball cover 54, corresponding position is provided with screwed hole, and three is threaded connection.First flange 571 exports transition apparatus by the bindiny mechanism of sealing with efferent duct or other and is connected.In the present embodiment, on ring flange 57, the sidewall being connected to the second flange 573 offers two breach, conveyer belt is through described two breach, belt wheel 56 is connected with motor 6, motor 6 drives described belt wheel 56 to rotate by described conveyer belt, and then grading wheel 51 rotates, and carries out classification to the particle upwards carried from crushing chamber 92.The angle of described two breach axis, preferably no more than 180 °, from being connected with belt wheel, can be connected with adjacent component again relatively securely.
Grading wheel 51 is in the present embodiment by ring flange 57 and described efferent duct conducting, and grading wheel 51 and ring flange 57 joint are provided with the joint cooperatively interacted, as shown in Figure 8, Figure 9.Fig. 8 is the schematic diagram in described another direction of grading wheel, illustrates the interface structure that the present embodiment grading wheel 51 is connected with ring flange 57; Away from one end of described classification part on described wheel shaft, comprise two-layer connected sidewall, lateral wall is given prominence to.Fig. 9 is the schematic diagram in described another direction of ring flange, and the neck sidewall be connected with described first flange 571, along ring flange 57 axis direction, extends within neck, forms an interface matched with grading wheel 51; This interface comprises outstanding inwall 576 and outstanding lateral wall 574, is connected with the parietal layer 575 of indent between inner and outer wall.The outstanding lateral wall of described grading wheel 51 stretches into described ring flange 57 indent parietal layer 575, and the madial wall of described grading wheel 51 coordinates with described inwall 576 and contacts simultaneously.Due in the airflow milling running of the present embodiment, can produce relative rotation between grading wheel 51 and ring flange 57, arrange lubricating layer between the interface that therefore can cooperatively interact at grading wheel 51 and ring flange 57, this lubricating layer can be lubrication wet goods.
As can be seen from above, the small negative pressure airflow milling with ellipsoid structure crushing chamber provided by the present invention, has less structure, is applicable to the occasion that laboratory etc. needs a small amount of comminuting matter; Airflow milling provided by the present invention, has the crushing chamber of part ellipsoidal shape, when meeting air-flow and pulverizing material, further reduces the gross space shared by airflow milling simultaneously.In addition, the airflow milling of the embodiment of the present invention, the classification part of grading wheel is arranged in classification chamber, and adopt the cavity of pipeline communication classification part and the efferent duct of material, thus the air ventilation passage structure integrated symmetric of airslide disintegrating mill, the circulation of gas and material is more stable, thus the airslide disintegrating mill of the embodiment of the present invention has more stable duty, and its service life is corresponding prolongation also.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. there is a small negative pressure airflow milling for ellipsoid structure crushing chamber, comprise gathering-device, motor, controlling organization, efferent duct, feeding device, it is characterized in that, also comprise negative pressure device, airslide disintegrating mill; Described gathering-device is communicated with described airslide disintegrating mill by described efferent duct; Described airslide disintegrating mill is provided with the crushing chamber of part ellipsoidal shape, and the transverse two ends of a described crushing chamber cross section are provided with air-flow admission passage; Material adds in described airslide disintegrating mill by described feeding device; Motor connects the classification mechanism of described airslide disintegrating mill by belt wheel mechanism; Described efferent duct is connected with the top of described airslide disintegrating mill; Described gathering-device is connected with described efferent duct; Under the control of described controlling organization, material adds in the crushing chamber of described airslide disintegrating mill by described feeding device, the air-flow flowed into from described air-flow admission passage is pulverized described material, described negative pressure device makes to produce pressure along material and gas circulating direction in described efferent duct, makes the material after described pulverizing output to described gathering-device through described efferent duct;
Described airflow milling also comprises classification mechanism, and described efferent duct is communicated with described airslide disintegrating mill by described classification mechanism;
Described crushing chamber bottom surface is provided with the lower nozzle that air-flow enters;
Described air-flow admission passage extends, to the elliptic focus place of respective cross section to crushing chamber inside;
Described classification mechanism comprises grading wheel; Described grading wheel has the inner chamber be communicated with described efferent duct; The classification part that described grading wheel comprises interconnective wheel shaft and is connected with wheel shaft bottom; Described wheel shaft is hollow tubular, stretches out outside described airslide disintegrating mill, is set in an outer sleeve by two bearings and a bottom bracket axle; Described classification part comprises columniform inner chamber, is arranged in described airslide disintegrating mill; Described wheel shaft one end and described inner space, the other end is communicated with described efferent duct.
2. the small negative pressure airflow milling with ellipsoid structure crushing chamber according to claim 1, is characterized in that, described airslide disintegrating mill also comprises the adapter cavity be connected with described crushing chamber and the classification chamber be connected with described adapter cavity; Described classification chamber is circular; The cross section that described adapter cavity is connected with described crushing chamber is for oval, and the cross section that described adapter cavity is connected with described classification chamber is for circular.
3. the small negative pressure airflow milling with ellipsoid structure crushing chamber according to claim 1, is characterized in that, described classification part comprises circular upper base, circular going to the bottom and a series of blade; The circumference that described blade connects described upper base and goes to the bottom, surrounds into cylindrical cavity with described upper base with going to the bottom; Be provided with manhole in the middle part of described upper base, described wheel shaft is communicated with described cavity by this through hole.
4. the small negative pressure airflow milling with ellipsoid structure crushing chamber according to claim 1, it is characterized in that, described classification mechanism also comprises lower ball cover, outer sleeve, upper ball cover, caping, belt wheel, ring flange; Described two bearings are arranged at described outer sleeve two ends respectively, and described in described lower ball cover shutoff, outer sleeve is close to one end of described classification part, the outer sleeve other end described in described upper ball cover shutoff, and described bottom bracket axle is arranged between described two bearings; Described caping connects described upper ball cover, is connected with described ring flange flange simultaneously; Described belt wheel is fixed on described wheel shaft, drives described wheel shaft to rotate; Described ring flange is set in described wheel shaft.
5. the small negative pressure airflow milling with ellipsoid structure crushing chamber according to claim 4, it is characterized in that, described ring flange is hubbed clip-on-welding flange, comprises the first flange, neck and the second flange; Described neck is stepped, and ladder bottom is greater than top internal diameter, and its location is connected with described second flange, and its top is connected with described first flange; Outstanding and be connected with described wheel shaft with the interface that described wheel shaft matches to neck interior in the axial direction with the neck sidewall that described first flange is connected; Belt wheel described in the neck side walls enclose that described first flange connects, which is provided with opening, makes at least one conveyer belt connect described belt wheel and described motor through described opening.
6. the small negative pressure airflow milling with ellipsoid structure crushing chamber according to claim 5, it is characterized in that, described opening is provided with two.
7. the small negative pressure airflow milling with ellipsoid structure crushing chamber according to claim 6, is characterized in that, the angle between described two opening axis is no more than 180 °.
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| CN104001603B (en) * | 2014-05-01 | 2016-02-17 | 铜陵钱谊化工设备有限责任公司 | A kind of two injection tubular type pulverizer |
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