CN107175154A - Convexity not simultaneously coil spring and hybrid density medium dual-drum vibration mill - Google Patents

Convexity not simultaneously coil spring and hybrid density medium dual-drum vibration mill Download PDF

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Publication number
CN107175154A
CN107175154A CN201710533478.4A CN201710533478A CN107175154A CN 107175154 A CN107175154 A CN 107175154A CN 201710533478 A CN201710533478 A CN 201710533478A CN 107175154 A CN107175154 A CN 107175154A
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spring
mill
convexity
doubling
shaft
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杨小兰
王志亮
刘极峰
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Nanjing Institute of Technology
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Nanjing Institute of Technology
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Priority to CN201710533478.4A priority Critical patent/CN107175154A/en
Publication of CN107175154A publication Critical patent/CN107175154A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/14—Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/24—Driving mechanisms

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

The present invention is that simultaneously coil spring is not ground a kind of convexity with hybrid density medium bitubular double-mass vibrating, including main vibrating system and vibrating isolation system, main vibrating system includes motor, exciter shaft is connected with motor outer shaft by shaft coupling, exciter shaft is arranged on support, between the support consolidation and upper cylinder and lower cylinder of exciter shaft, it is connected between upper plastid base by main vibration spring group and spring short guiding column, vibrator is between the connecting plate of mill tube above and below upper plastid, main vibration spring group is made up of several middle convex not doubling-up helical springs, each spring is formed by a steel wire coil around structure, steel wire is wound into convexity type helical structure, middle convex not doubling-up helical spring at least encloses the effective helix angle of the above.The present invention has a particle refinement, powder distribution band narrows, energy consumption is low, mill efficiency is high, capacity usage ratio is high and effective accumulation of energy, energy-conservation, steady running, significantly reduces the features such as noise, vibration isolating effect are good.

Description

Convexity not simultaneously coil spring and hybrid density medium dual-drum vibration mill
Technical field
The present invention relates to milling equipment prepared by a kind of vibration of superfine powder, be it is a kind of have middle convex not simultaneously coil spring, Medium is the dual-drum vibration mill that hybrid density is matched, and belongs to vibration using the interdisciplinary science technology with powder technology.
Background technology
Vibromill is the vibrating mechanical equipment that material fining grinding operation is completed using vibration principle, existing superfine powder In technology of preparing, vibromill is with other preparation methods if any gas phase synthesis method, liquid phase synthesizing method, comminution by gas stream, roller mill method Etc. comparing, with the advantage, existing vibromill branch such as mechanical mass activity is big, purification is convenient, cost is low, simple in construction, efficiency is high Support spring and typically use line style equal pitch helical spring；Its medium generally uses isodensity medium, and such as abrasion-resistant stee, zirconium oxide are single One density medium；Body is commonly elemental body structure.
The elemental body structure of vibromill, shows between the vibration plastid and base that are made up of cylinder and vibrator, is to pass through Spiral compression spring is connected, the vibration that vibration plastid is produced, and ground can be directly acted on by spring pedestal, is produced larger with making an uproar Sound, therefore it is larger to consume energy.In recent years, or the research report that there is double-mass vibrating to grind, but due to double-mass vibrating mill be related to it is main every Vibrating system is designed, and its structure is relative complex, cost is higher, therefore practical application person rarely has news.
In Practical Project, the parameter such as vibrational system quality, exciting force, damping force is mostly change person, such as vibromill Medium, the mill of grinding charge material formation of system in itself are situated between and flowed, and constantly throw, fall in motion process, and actually one Nonlinear change can also occur wherein for the process of individual complicated mass change, damping, and the bias of the inclined block formation of vibrating motor swashs Power of shaking is change with the change of corner non-linear, and vibration grinding system is actually a typical nonlinear system, is One has the strong nonlinear vibration system for determining excitation and uncertain response.
The load character curve for the equal pitch helical spring that existing vibromill is generally used is linear line, to wait stiffness helix Spring, does not account for the actual condition of mission nonlinear, such as jigging conveyer, vibrating scalper, vibrating mill, due to motion shape The system load moment is all in change under state, therefore the stiffness helix spring such as uses, though there is simple in construction, low cost and other advantages, so deposits Noise is big, power consumption is high, efficiency is low, the maintenance frequency is high, equipment life low problem.
Normal spiral spring is linear characteristic wire spring, and its load is linear with deforming；Variable-pitch screw spring is then For nonlinear characteristic wire spring, its load is in non-linear relation with deformation, and with special performance, the load of all of which reaches After to a certain degree, the stress in material section is changed along the length of material.Therefore, the size of material will be according to maximum Stress is determined；The height or length of spring will be determined according to deformation required after stand under load.
Normal linear spring can not realize variation rigidity, then can not realize the vibration coupling with above-mentioned complex vibration system or association Vibration is adjusted, thus efficiency is low, energy consumption is big, noise is big.How so that the change of vibrational system rigidity and elastic force, with its in system The active force that it varies goes to realize vibration coupling, to reach the purpose of efficient energy-saving, be one be worth discussion the problem of.
Recent domestic experts and scholars are inquiring into the solution of above mentioned problem always, though there is non-linear variable-pitch screw The application report of metal spring, but the problem of noise is bigger when still suffering from noise big, doubling-up, used in nonlinear vibration motivation, Easily there is short life, repair the problems such as frequency is high, cost is high.
In summary, while overcoming the new grinding machine with efficient energy-saving of above mentioned problem to be not yet suggested so far.
The content of the invention
The present invention provides a kind of middle convex not simultaneously coil spring, hybrid density medium dual-drum vibration mill, main with technical characteristic The spring that shakes is middle convex not simultaneously coil spring, and be variation rigidity；Be improve impact of the mill Jie's ball in relative motion in cylinder, extruding, Shearing, the energy of collision, implement hybrid density medium size composition optimal design-aside, with existing widely used common double tube mill phase Than, with obvious efficiency high, noise is small the features such as, it is intended to effectively solve existing vibromill all the time, it is pendent to make an uproar Sound is big, the low technical bottleneck problem of efficiency.
The new dual-drum vibration mill of the present invention takes following technology to realize：
The present invention is that simultaneously coil spring is not ground a kind of convexity with hybrid density medium bitubular double-mass vibrating, including main vibrating system And vibrating isolation system,
Main vibrating system is included outside the motor being arranged on electric machine support by Frequency Converter Control, exciter shaft and motor Axle is connected by shaft coupling, and exciter shaft is arranged on support, between the support consolidation and upper cylinder and lower cylinder of exciter shaft, group Into upper plastid, mill tube is arranged on plastid up and down, and main vibration spring group and spring short-range missile are relied between the upper plastid base Post is connected, and vibrator is between the connecting plate of mill tube above and below upper plastid, the exciting source as whole grinding machine,
Main vibration spring group is made up of several middle convex not doubling-up helical springs, and each spring is by a steel wire coil around structure Form, steel wire is wound into convexity type helical structure, and middle convex not doubling-up helical spring at least encloses the effective helix angle of the above, and has The effective pitch for imitating spiral is the spiral of equal pitch, and spiral central diameter is distributed in Rearrangments from the middle to both ends.
Further improvement of the present invention is：Middle convex not doubling-up helical spring hangs down in vibromill along with motor main shaft Nogata is placed several rows along with electric machine main shaft parallel direction to several rows are put, constitutes the uniform state of spring.
Further improvement of the present invention is：The mill is situated between for the medium size composition of two or more different densities.
The bitubular of the present invention also two be exactly mill tube above and below double mill tubes mainly include with double mass structure, upper plastid, motor, The parts such as vibrator, main vibration spring, base；Wherein mill tube is consolidated on plastid；By master between upper plastid and base Shake spring and spring short guiding column is connected；Base is connected due to ground；Connecting plate of the vibrator mounted in mill tube above and below upper plastid Between, the exciting source as whole grinding machine.During work, the amplitude and acceleration of upper plastid are larger, can improve medium pair in mill tube The impact grinding ability of material；Partial vibration is transmitted to basis by upper plastid by main vibration spring group.
Vibrator rotating shaft is connected with motor outer shaft by shaft coupling in main vibrating system；Its support is consolidated in lower shell Between, plastid on composition, and be connected by main vibration spring with base；, can be sharp to change by inverter control motor after energization Shake power, vibrator makees approximate circle vibration with mill tube so that mill, which is situated between, in mill tube produces mutually motion, so, in cylinder and Stick to mill be situated between and barrel on powder due to mill be situated between and mill be situated between to rub with the shock of material, shearing, stranding and reach grinding Purpose.The vibromill can significantly reduce vibration and make an uproar that vibromill main body produces to ground by main vibration spring group Sound, because base is by bolt group and ground concrete mutually, can prevent moving horizontally for vibrating mill.
The main vibration spring group of grinding machine of the present invention is made up of some middle convex not doubling-up helical springs, wherein each spring Formed by a steel wire coil around structure, described steel wire is wound into middle convex helical structure, middle convex spring according to design data The Parameters variation such as design visible system quality, exciting force be designed.It is more than the middle circle of convex not doubling-up helical spring at least 4 Effective helix angle, and effective helix angle effective pitch be equal pitch spiral, spiral central diameter is general in symmetrical from centre to two ends Successively decrease distribution.
The load envnlope line of the middle convex not doubling-up helical spring is cumulative type non-linear line, and be it is continuous or point Section is continuous, and this is conducive to preventing the generation of its resonance and flutter；Due to the change of central diameter, in identical steel wire diameter same pitch In the case of, decrement during adjacent two steel wires doubling-up, middle convex spring is big compared with common spring.It is special according to the structure of this spring Point, it is considered to the condition of not doubling-up, can be achieved the not doubling-up of grinder system main vibration spring, can return the noise that spring doubling-up is produced Zero.
Due to the central diameter change of the helical structure of convex not doubling-up helical spring in composition, there is the present invention obvious non- Linear and required variation rigidity feature, i.e., the system stiffness that spring of the present invention is constituted has the variation rigidity increased and decreased with loads increasing or decreasing Feature, makes the effective accumulation of energy of system, energy-conservation, steady running, significantly reduces the purpose of noise to reach.
The middle convex not doubling-up helical spring group formula vibromill, middle convex not doubling-up helical spring in vibromill along with Electric machine main shaft vertical direction puts multiple rows of, places some rows along with electric machine main shaft parallel direction, the uniform state of spring is constituted, to shake The preferably work of dynamic mill.
Vibromill is to utilize the vibration for vibrating mill tube generation certain frequency so that the medium such as ball or rod in cylinder produces inertia Power has compact conformation, volume with comminuting matter, the acceleration of mill tube vibration to complete to impact typically up to 6g-12g Small, lightweight, properties of powder performace concentration, process simplification, the advantages of simple to operate, easy to maintenance, liner plate Medium Replacement is easy, can be wide It is general to be used for the industry powder such as metallurgy, building materials, mine, fire resisting, chemical industry, glass, ceramics, graphite.
The medium that existing vibromill technology is used, size can be entered according to different material by experiment or numerical simulation Row is compared, to determine optimum gradation, and its right density is chosen like all single density mediums, typically using forged steel, abrasion-resistant stee, Wear resistant cast iron, high chrome, middle chromium steel etc., its shape can be spherical or round bar shape, but mill tube to be further added by and media impingement thing Acceleration during material, single density medium is almost helpless, and Jie of appropriate two or more different densities of selection Matter is matched, such as wolfram steel, abrasion-resistant stee, in the throwing of grinding process, collision process, because its density of material differs about 2 times, is then led Cause that mill in cylinder is situated between involve, relative velocity and involve, the motion value such as relative acceleration increases severely, and necessarily causes its impact energy That measures greatly improves, as the necessary condition for improving mill efficiency.
The realization of hybrid density media technology main points, can reach generation impact, shearing, extruding etc. in grinding operation a variety of The Practical Project effect of the combining ability effect of power, some work barrier for overcoming vibrating machine solve vibrating machine special It is some key technologies of vibromill or the bottleneck problem of restriction development, such as solves ultramicro powder in vibromill and do not refine, easily roll into a ball Gather, powder product distribution band is big compared with wide and energy consumption, mill efficiency is low, the low problem of capacity usage ratio, and then realize material Ultra-fine or ultramicro grinding, reduction energy consumption, raising efficiency, with significant engineering effort, economic and social benefit, due to high density Medium is using the financial cost for causing grinding machine exciting power slightly to be lifted, compared with the economic benefit that the present invention is produced, for chasing after The target of high-quality powder is asked to can be ignored substantially.
The beneficial effects of the invention are as follows：Main vibration spring of the present invention will not doubling-up under maximum load so that system noise Sound is significantly reduced, and dynamic stability is greatly increased, and overall efficiency is obviously improved；In the feelings of hybrid density medium size composition optimal design-aside Under condition, compared with existing grinder system, from Media density this angle examination, the advantages such as high, the reduction energy consumption of system effectiveness are improved It is even more apparent.
In summary, it is positive, obvious and unique using the effect of the present invention, it has particle refinement, powder distribution Band narrows, energy consumption is low, mill efficiency is high, capacity usage ratio is high and effective accumulation of energy, energy-conservation, steady running, significantly reduce noise, The features such as vibration isolating effect is good.The above-mentioned technology of the present invention, is effectively solving existing vibromill pendent energy consumption all the time Greatly, in the low technical bottleneck problem of efficiency, a step of leap will be realized.
Brief description of the drawings
Fig. 1 is vibromill structural representation of the present invention.
Fig. 2 is convex not doubling-up helical spring structure schematic diagram in the present invention.
Fig. 3 is convex spring adjacent turn not doubling-up schematic diagram in the present invention.
Wherein：1- supports, 2- exciter supports, 3- main vibration spring groups, 4- connecting tubes, 5- flanges, the upper cylinders of 6-, 7- connections Water pipe in plate, 8- vibrator covers, 9-, 10- enters water swivel, and 11- exciter shafts, 12- feeding mouths, 13- rubber is taken over, 14- suspension ring, Cylinder under 15- shaft couplings, 16- blimps, 17- motor, 18- electric machine supports, 19-, 20- discharging openings, 21- left avertence blocks, 22- right avertence Block.
Embodiment
In order to deepen the understanding of the present invention, present invention work is further retouched in detail below in conjunction with drawings and examples State, the embodiment is only used for explaining the present invention, protection scope of the present invention is not constituted and limited.
As shown in figure 1, material is continuously added to by feeding mouth 12, upper cylinder 6, lower cylinder 19 and each shaft screen are passed through in vibration processes Mesh screen point, finished product is continuously discharged by discharging opening 20, and in the course of work, mill Jie's packing factor of cylinder is 0.65 up and down, and mill Jie is Abrasion-proof steel ball, wolfram steel ball, mill Jie's diameter are set depending on grinding charge material granularity, may generally be 3~30mm, and it is higher that it grinds efficiency, shakes The vibration frequency of dynamic grinding machine is in 750~3000 times/min, and its amplitude is 2~30mm.Vibration frequency and the strong, size of amplitude of shaking, All have a great impact to the crushing effect that mill is situated between.
The outer wall of upper lower shell is formed with annular water flowing layer, and cooling water enters upper shell through water pump to water swivel 10 is entered, in Water pipe 9 flows into lower shell, then flows into tank through delivery port, realizes water circulation.In cyclic process, mill can be situated between by water produces conduction The heat of supreme lower shell is taken away in time, cooling is realized, to ensure the grinding quality of material.
Motor 17 imparts power to exciter shaft 11 on support 1 by shaft coupling 15 in Fig. 1, and vibrator is using sharp Plastid work in the inclined block shaken on device axle vibratory drive produced when rotating.Mill tube makes built with medium and powder, vibration The mill such as steel ball in mill tube, which is situated between, to be produced collision, impact, shearing, extruding and rubbing with the hands to material and grinds, and reaches and material is carried out to crush and thin The purpose of mill.By adjusting the angle of the inclined block of major-minor, the level for changing mill Jie with selecting, implementing the measures such as VFC, it can reach Control the purpose of product granularity and productivity ratio.
Because the structure of the inclined block portion in left and right point is full symmetric on central plane in vibrator, therefore in embodiment Main that left avertence block portion point is stated, embodiment is identical therewith for right avertence block portion point；Due to symmetry, block portion point partially during motion or so Easily realize synchronous, occasionally there is nonsynchronous situation in short-term, because exciter shaft has enough rigidity and intensity, therefore the axial direction produced The moment of couple is completely in system tolerance range.
The present invention's is mainly characterized by exciting force, amplitude, the parameter variation ranges such as frequency, oscillation intensity that shake greatly, passes through frequency conversion Device can control effectively to its size, action time.
The vibrating mill of the present invention, the not only variation rigidity of main vibration spring and not doubling-up can reduce noise, while using having The blimp 16 of good soundproof effect covers whole working machine, effectively noise reduction is can reach further, while playing raising grinding Efficiency, improves the purpose of working environment.
The present invention is from the medium size composition of two kinds of different densities, i.e. wolfram steel, abrasion-resistant stee, in the throwing of grinding process, collides During, because its density of material differs about 2 times, then cause that mill in cylinder is situated between involve, relative velocity and involve, relative acceleration Deng motion value increase severely, due to greatly improving for impact energy, then generate raising mill efficiency, reduction smashing fineness, Reduce the multi-effect of noise.
In Fig. 2, middle convex not doubling-up helical spring by a steel wire coil around constituting, during described steel wire coil is coiled into by design Convex helical structure, the Parameters variation such as design visible system quality, the exciting force of middle convex spring is improved, and middle convex is not simultaneously The effective helix angle that helical spring at least 4 encloses the above is enclosed, and the effective pitch of effective helix angle is the spiral of equal pitch, spiral central diameter From centre to two ends Rearrangments.
The load envnlope line of the spring is cumulative type non-linear line, and is continuous or zonal cooling, and this is conducive to Prevent the generation of its resonance and flutter；The big I of pitch is that different pitches are taken between each is enclosed, or a few circles are one group Take into several different pitches；Pitch can ascending unidirectional array, also can be by bi-directional arrangement broad in the middle small in ends.
The pitch of middle convex not doubling-up helical spring is identical, and spiral central diameter is from centre to two ends Rearrangments.Middle convex is not Doubling-up helical spring plays support framework, with good nonlinear characteristic and damping and amortization, is particularly carried during work in system Lotus increases, is mutated or can played when overloading and occurring doubling-up raising bearing capacity, increase system stiffness and noise reduction, noise reduction, vibration damping Effect.
Fig. 3 is middle convex spring adjacent turn not doubling-up schematic diagram, from the figure 3, it may be seen that convex spring is in axis direction in this Position circle is symmetrical above and below, then middle position loop diameter is maximum and rigidity is minimum, therefore easily doubling-up, if its radius is R, as long as then controlling in theory Spring processed is in maximum axial FmaxUnder effect, spring middle position circle and the cylindrical normal distance Δ d of neighbouring coil springn>0, The not doubling-up of whole motion process can be achieved.If known spring wire diameter d, the rigidity k of spring middle position circlemin, spring axial direction Pitch ta, then rigidity kminIt should meet
taminFor FmaxThe minimum axial direction pitch of the lower middle position spring not doubling-up of effect, if setting Δ dn=0.1d, then have Fmax<kmin (ta-tamin), it is defined as the maximum allowable load of spring not doubling-up.By Tu Ke get (d+ Δs dn)2=(R-R1)2+tamin 2。
Then have
With formula (1) simultaneous, it can obtain
Thus the not doubling-up of grinder system main vibration spring can be realized.

Claims (3)

1. convexity not simultaneously coil spring and hybrid density medium dual-drum vibration mill, including main vibrating system and vibrating isolation system, its feature exist In：
The main vibrating system includes the motor (17) being arranged on electric machine support (18) by Frequency Converter Control, exciter shaft (11) it is connected with motor (17) outer shaft by shaft coupling (15), the exciter shaft (11) is arranged on support (1), described The support of exciter shaft (11) is consolidated between upper cylinder (6) and lower cylinder (19), plastid on composition, and mill tube is arranged on plastid up and down On, it is connected between the upper plastid base by main vibration spring group and spring short guiding column, vibrator is above and below upper plastid Between the connecting plate (7) of mill tube, the exciting source as whole grinding machine,
The main vibration spring group (3) is made up of several middle convex not doubling-up helical springs, each spring by a steel wire coil around Structure is formed, and steel wire is wound into convexity type helical structure, and middle convex not doubling-up helical spring at least 4 encloses the effective helix angle of the above, And the effective pitch of effective helix angle is the spiral of equal pitch, spiral central diameter is distributed in Rearrangments from the middle to both ends.
2. convexity not simultaneously coil spring and hybrid density medium dual-drum vibration mill according to claim 1, it is characterised in that：Convexity Type not doubling-up helical spring puts several rows in vibromill along with motor main shaft vertical direction, and edge is put with electric machine main shaft parallel direction Put several rows, constitute the uniform state of spring.
3. convexity not simultaneously coil spring and hybrid density medium dual-drum vibration mill according to claim 1, it is characterised in that：It is described Mill is situated between for the medium size composition of two or more different densities.
CN201710533478.4A 2017-07-03 2017-07-03 Convexity not simultaneously coil spring and hybrid density medium dual-drum vibration mill Pending CN107175154A (en)

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CN201710533478.4A CN107175154A (en) 2017-07-03 2017-07-03 Convexity not simultaneously coil spring and hybrid density medium dual-drum vibration mill

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Application Number Priority Date Filing Date Title
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Application publication date: 20170919