CN206996734U - Simultaneously coil spring bitubular double-mass vibrating is not ground pitches - Google Patents
Simultaneously coil spring bitubular double-mass vibrating is not ground pitches Download PDFInfo
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- CN206996734U CN206996734U CN201720794195.0U CN201720794195U CN206996734U CN 206996734 U CN206996734 U CN 206996734U CN 201720794195 U CN201720794195 U CN 201720794195U CN 206996734 U CN206996734 U CN 206996734U
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Abstract
The utility model is that simultaneously coil spring bitubular double-mass vibrating is not ground pitches, including main vibrating system and vibrating isolation system, main vibrating system includes the motor being arranged on electric machine support by Frequency Converter Control, 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, plastid on composition, upper and lower mill tube is arranged on plastid, vibrator is between upper the plastid up and down connecting plate of mill tube, as the exciting source of whole grinding machine, vibrating isolation system includes the lower plastid being connected with main vibration spring group, the other end of lower plastid is connected with isolation spring, isolation spring is connected by base with ground.The utility model has the characteristics that ultramicro powder refinement, de-agglomerated, powder product distribution, and band narrows, energy consumption is low, mill efficiency is high, capacity usage ratio is high and effective accumulation of energy, energy-conservation, steady running, to significantly reduce noise, vibration isolating effect good.
Description
Technical field
A kind of milling equipment prepared for the vibration of material fining powder is the utility model is related to, is that one kind has pitches
Simultaneously coil spring, medium are not the bitubular double-mass vibrating mill of hybrid density proportioning, belong to vibration and intersect using with powder technology
Science and 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, there is the advantages such as mechanical mass activity is big, purification is convenient, cost is low, simple in construction, efficiency is high, existing vibromill branch
Support spring typically uses 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 mostly elemental body structure.
The elemental body structure of vibromill, show between the vibration plastid and base that are made up of cylinder and vibrator, be to pass through
Spiral compression spring is connected, and is vibrated caused by vibration plastid, ground can be directly acted on by spring pedestal, 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 designs, and its structure is relative complex, cost is higher, therefore practical application person is few.Again may be used according to use occasion difference vibromill
It is divided into the structures such as single, double, triple cylinder, dual-drum vibration mill is used for the occasion that material needs to work continuously.
In Practical Project, the parameter such as vibrational system quality, exciting force, damping force is mostly change person, such as vibromill
The mill that medium, the grinding charge material of system in itself are formed, which is situated between, to flow, and constantly throws, falls in motion process, and actually one
Nonlinear change can also occur wherein for the process of individual complicated mass change, damping, and the bias that the inclined block of vibrating motor is formed swashs
Power of shaking be with the change of corner and change it is non-linear, vibration grinding system be actually a typical nonlinear system, be
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 vibrating machine generally uses for linear line, for etc. rigidity spiral shell
Spring is revolved, does not account for the actual condition of mission nonlinear, such as jigging conveyer, vibrating scalper, vibrating mill, due to motion
The system load moment is all changing under state, therefore the stiffness helix spring such as uses, though there are simple in construction, low cost and other advantages, so
Noise is big, power consumption is high, efficiency is low, the maintenance frequency is high, equipment life is low etc. be present.
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, has 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 determines；The height or length of spring will determine according to deformation required after stand under load.
Normal linear spring can not realize variation rigidity, then can not realize and the vibration coupling of 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 inquire into the problem of, this reality
With the introducing of new variable-pitch spring, the needs of exactly this research.
Recent domestic experts and scholars are inquiring into the solution of above mentioned problem always, due to equal pitch, constant stiffness spiral shell
Rotation metal spring is easily designed, easily manufactured, good economy performance, therefore is widely used for a long time.
In summary, while the new grinding machine with efficient energy-saving of above mentioned problem is overcome not yet to be suggested so far.
The content of the invention
The utility model provides a kind of pitches, and simultaneously coil spring, hybrid density medium bitubular double-mass vibrating are not ground, and are had
Double mass technical characteristic, main vibration spring are pitches not simultaneously coil spring, and isolation spring is rubber duck complex spring, master-vibration isolation
Spring is variation rigidity；It is to improve to grind impact of Jie's ball in relative motion, extruding, shearing, the energy of collision in cylinder, implements mixed
Close density medium ratio optimization to set, compared with existing widely used common bitubular vibrating mill system, there is obvious effect
The features such as rate is high, noise is small, it is intended to effectively solve existing vibromill all the time, the skills such as pendent noise is big, efficiency is low
Art bottleneck problem.
New bitubular double-mass vibrating mill of the present utility model takes following technology to realize：
The utility model is that simultaneously coil spring bitubular double-mass vibrating is not ground pitches, including main vibrating system and vibrating isolation system,
Main vibrating system includes the motor being arranged on electric machine support by Frequency Converter Control, and exciter shaft passes through connection with motor outer shaft
Axle device is connected, and exciter shaft is arranged on support, between the support consolidation and upper cylinder and lower cylinder of exciter shaft, matter on composition
Body, upper and lower mill tube are arranged on plastid, and vibrator turns into whole grinding machine between upper the plastid up and down connecting plate of mill tube
Exciting source,
Vibrating isolation system includes the lower plastid being connected with main vibration spring group, and the other end of lower plastid is connected with isolation spring, every
The spring that shakes is connected by base with ground.
The bitubular of the present utility model and double mass structure mainly include upper and lower mill tube, upper plastid, lower plastid and motor,
The parts such as vibrator, main vibration spring, shock-absorbing spring, bottom plate；Wherein mill tube is consolidated on plastid up and down；Upper plastid is with
It is connected between plastid by the spring guide pillar in main vibration spring and upper and lower plastid；Lower plastid is supported on bottom by shock-absorbing spring
On plate；Vibrator turns into the exciting source of whole grinding machine between upper the plastid up and down connecting plate of mill tube.During work, upper and lower matter
Body is vibrated with different amplitudes and acceleration.Obviously, the amplitude of upper plastid and acceleration are larger, can improve in mill tube medium to thing
The impact grinding ability of material；The amplitude and acceleration of lower plastid are smaller, then can be greatly reduced by isolation spring and be transmitted to basis
Dynamic loading.
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 vibrating isolation system；Lower plastid one end is connected with main vibration spring, the other end
It is connected with isolation spring, isolation spring is connected by fixed bottom plate with ground.After energization, by Frequency Converter Control vibrating motor, with
Change exciting force, vibrator makees approximate circle vibration with mill tube so that mill, which is situated between, in mill tube produces mutually motion, so, cylinder
It is interior and be adhered to mill be situated between and barrel on powder due to mill be situated between and mill be situated between with the shock of material, shearing, rub Mo Laida with the hands
To the purpose of grinding.The double-mass vibrating mill passes through two groups of springs of main vibration spring and isolation spring, can significantly reduce and shake
Dynamic mill main body has reached the effect of energy-conservation to oscillation intensity caused by ground and noise.Because isolation spring and ground pass through
Fixed bottom plate is connected, and can prevent moving horizontally for vibrating mill.
The main vibration spring group is made up of several pitches not doubling-up helical springs, each spring by a steel wire coil around
Structure forms, and described steel wire is wound into variable-pitch screw structure according to design data, and steel wire is wound into variable-pitch screw structure, becomes
Pitch not doubling-up helical spring at least 4 enclose the above effective helix angle, and the central diameter of effective helix angle for become central diameter spiral, central diameter from
Centre is typically distributed to both ends in Rearrangments.
Further improvement of the utility model is：The main vibration spring is in vibromill along vertical with vibrating motor main shaft
Direction is put number row, placed several rows along with vibrating motor main axis parallel direction, forms the uniform state of spring.
Further improvement of the utility model is：The isolation spring can be composite, such as compound for rubber duck
Isolation spring made of material.
Further improvement of the utility model is：The mill tube medium is two or more different proportioning.
The load envnlope line of the pitches not doubling-up helical spring is cumulative type non-linear line, and be it is continuous or point
Section is continuous, and this is advantageous to the generation for preventing its resonance and flutter；Due to the change of central diameter, in identical steel wire diameter difference pitch
In the case of, decrement during adjacent two steel wires doubling-up, variable-pitch spring is big compared with common spring.It is special according to the structure of this spring
Point, consider the condition of not doubling-up, the not doubling-up of grinder system main vibration spring can be achieved, noise caused by spring doubling-up is zeroed.
Due to the pitch variation of the helical structure of composition pitches not doubling-up helical spring, there is the utility model obvious
Non-linear and required variation rigidity feature, i.e., the utility model spring form system stiffness have increases and decreases with loads increasing or decreasing
Variation rigidity feature, make the effective accumulation of energy of system, energy-conservation, steady running, the purpose for significantly reducing noise to reach.
The pitches not doubling-up helical spring group formula double-mass vibrating mill, spring edge in vibromill are hung down with electric machine main shaft
Nogata is multiple rows of to putting, and places some rows along with electric machine main shaft parallel direction, the uniform state of spring is formed, so that vibromill is more preferable
Work.
The spring design of vibrational system so far, the factor of not doubling-up was not almost accounted for, both due to traditional design
Limitation, existing again influences that not doubling-up associated technical parameters are more and calculate numerous and diverse, thus not only noise is big for system, and energy consumption
Height, efficiency are low.According to the design feature of this spring, the bar of not doubling-up is analyzed and studied in the utility model research from working mechanism
Part, the not doubling-up of main vibration spring in the grinder system course of work can be achieved, noise caused by spring doubling-up is zeroed.
In the utility model, isolation spring can use composite to make, as rubber duck composite is made, lower plastid
It is connected by isolation spring and base with ground, because isolation spring has hard nonlinear characteristic, its rigidity has to be become with load
The characteristics of changing and changing, therefore good damping result, can obtain preferable noise reduction, and the purpose of firm banking mainly prevents from shaking
The dynamic mill movement in face in the horizontal direction.
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-sized, volume with comminuting matter, the acceleration of mill tube vibration to complete to impact typically up to 6g-12g
Small, in light weight, properties of powder performace concentration, process simplification, it is simple to operate, easy to maintenance, liner plate Medium Replacement is easy the advantages that, 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 uses, size can pass through experiment or numerical simulation according to different material
It is compared, to determine optimum gradation, it is substantially single density medium that its right density, which is chosen, typically using forged steel, wear-resisting
Steel, wear resistant cast iron, high chrome, middle chromium steel, zirconium oxide etc., its shape can be spherical or round bar shape, but mill tube to be further added by and
Acceleration during media impingement material, single density medium is almost helpless, and appropriate selection two or more not
With the medium size composition of density, such as wolfram steel, abrasion-resistant stee, in throwing, in collision process for grinding process, because its density of material differs
About 2 times, then cause that mill in cylinder is situated between involve, relative velocity and involve, the motion value such as relative acceleration increases severely, necessarily cause it
Impact energy greatly improves, and turns into the necessary condition for improving mill efficiency.
The realization of hybrid density media technology main points, it is a variety of to can reach generation impact, shearing, extruding etc. in grinding operation
The Practical Project effect of the combining ability effect of power, some work barrier for overcoming vibrating machine, it is special to solve vibrating machine
It is some key technologies of vibromill or restricts the bottleneck problem developed, does not refine, easily rolls into a ball as solved ultramicro powder in vibromill
Poly-, powder product is distributed the problems such as band is big compared with wide and energy consumption, mill efficiency is low, capacity usage ratio is low, and then realizes material
Ultra-fine or ultramicro grinding, reduce energy consumption, improve efficiency, there is significant engineering effort, economic and social benefit, due to high density
Medium, which uses, causes the financial cost that grinding machine exciting power is slightly lifted, right compared with economic benefit caused by the utility model
It can be ignored substantially in the target for pursuing high-quality powder.
The beneficial effects of the utility model are：Vibrating mill described in the utility model compared with common elemental body grinding machine, by
In with main vibrating isolation system, bigger exciting force on the one hand can be born, on the other hand can effectively reduce vibrating mill to ground
Vibration effect, reach good energy-saving effect；The rigidity of the variable-pitch spring and rubber spring can be maximum with grinder system
The change of load and change, can not only have accumulation of energy, the effect of energy-conservation, and provide necessary bar for the coupled vibrations of main vibration isolation
Part, not doubling-up of the main vibration spring under possible maximum load so that system noise significantly reduces and dynamic stability greatly increases,
Overall efficiency is obviously improved；In the case of hybrid density medium size composition optimal design-aside, compared with existing grinder system, from medium
Density this angle examination, it is even more apparent to improve the advantages such as high, the reduction energy consumption of system effectiveness.
Effect of the present utility model is positive, obvious and unique, and it has ultramicro powder refinement, de-agglomerated, powder production
Band narrows, energy consumption is low, mill efficiency is high, capacity usage ratio is high and effective accumulation of energy, energy-conservation, significantly steady running, drop for product distribution
The features such as low noise, vibration isolating effect are good.Above-mentioned technology of the present utility model, effectively solve existing vibromill all the time hang and
In the technical bottleneck problems such as pending energy consumption is big, efficiency is low, a step of leap will be realized.
Brief description of the drawings
Fig. 1 is the utility model embodiment vibromill structural representation.
Fig. 2 is the utility model embodiment main vibration spring sketch.
Fig. 3 is that two spring characteristic curves compare before and after the utility model embodiment amendment.
Fig. 4 is the utility model embodiment main vibration spring rigidity and load matched curve figure.
Wherein：1- supports, plastid under 2-, 3- main vibration spring groups, 4- connecting tubes, 5- flanges, the upper cylinders of 6-, 7- connecting plates, 8-
Inclined block cover, water pipe in 9-, 10- enter water swivel, 11- exciter shafts, 12- feeding mouths, the adapter of 13- rubber, 14- suspension ring, 15- shaft couplings
Device, 16- blimps, 17- motor, 18- electric machine supports, cylinder under 19-, 20- discharging openings, 21- left avertence blocks, 22- right avertence blocks, 23-
Isolation spring, 24- bases.
Embodiment
In order to deepen to understanding of the present utility model, the utility model is made below in conjunction with drawings and examples further
It is described in detail, the embodiment is only used for explaining the utility model, and the scope of protection of the utility model is not formed 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.In the course of work, mill Jie's packing factor of upper and lower cylinder is 0.65, 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, it is higher that it grinds efficiency.Shake
For the vibration frequency of dynamic grinding machine in 750~3000 times/min, its amplitude is 2~30mm.Vibration frequency and the strong, size of amplitude of shaking,
The crushing effect being all situated between to mill has a great impact.
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 caused vibratory drive when the inclined block to shake on device axle rotates.Mill tube makes built with medium and powder, vibration
The mills such as the steel ball in mill tube be situated between collision is produced to material, impact, shearing, extruding and rubbing with the hands are ground, reach and material crush and thin
The purpose of mill, by adjusting the angle of the inclined block of major-minor, changing and grind the measures such as the grading being situated between selection, implementation 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
Mainly to left avertence block portion point statement, 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 caused axial direction
The moment of couple is completely in system tolerance range.
Exciting force, amplitude, the parameter variation ranges such as frequency, oscillation intensity that shake of the present utility model of being mainly characterized by is big, passes through
Frequency converter can control effectively to its size, action time.
During vibrating mill work operating, grind that shock, the abrasive action of Jie are levigate by material, and this process is mainly due to cylinder
The repeated stock that interior mill is situated between with abrasive material causes particle to crack, and when powder deforms, new surface is just with these crackles
Based on gradually grow up, after unloading, in the presence of molecular force, they " heal " again, when ground most weak individually
When side i.e. the place of defect maximum are undergone mutation, solid will produce the destruction of macroscopic view, and mill is situated between to abrasive material in vibromill
Percussion, these microfissues is had little time " to heal " just and continuously impacted, expand microscopic checks rapidly, split
The continuous extension of line is vibrated with this, collided, impacted to carry out the fine grinding of solid material be effective so that crush.
Because vibration milling machine structure size is larger, work is continuous, and the influence of random maximum load be present, therefore caused make an uproar
Sound is larger, if not taking appropriate vibration isolation measure, dynamic loading that will be very big is transmitted to basis, ground and building is produced and is harmful to
Vibration, not only produce noise pollution environment, under serious situation, machine breakdown can be made and stopped production, and long-continued operation,
Not only the machine life-span is greatly shortened, and also peripheral equipment and building can be had an impact.
Therefore, the utility model is designed as double-mass vibrating grinding machine, only not main vibrating system, and has vibrating isolation system；Master shakes
System uses suitable vibration frequency, to meet the vibrational state needed for system work；Vibration isolation is used with nonlinear characteristic
Rubber spring, can reduce exciting source to basis exciting force, oscillation intensity to basis transmission, play effectively absorbing effect,
The dynamic loading for being transmitted to basis is reduced, greatly reduces noise caused by system；Simultaneously using the sound insulation with good soundproof effect
Cover 16 covers whole working machine, can reach further effective noise reduction, while plays raising mill efficiency, improves working environment
Purpose.
The utility model is from the medium size composition of two kinds of different densities, i.e. wolfram steel, abrasion-resistant stee, the throwing of grinding process,
In collision process, because its density of material differs about 2 times, then cause that mill in cylinder is situated between involve, relative velocity and involve, it is relative plus
Speed etc. is moved value and increased severely, and due to greatly improving for impact energy, then generates and improves mill efficiency, reduces crushing carefully
Degree, the multi-effect for reducing noise.
As shown in Fig. 2 pitches not doubling-up helical spring by a steel wire coil around forming, described steel wire coil by design around
Into variable-pitch screw structure, the Parameters variation such as the design visible system quality of variable-pitch spring, exciting force is improved.Pitches
Not doubling-up helical spring at least 4 enclose the above effective helix angle, and the effective pitch of effective helix angle be equal pitch spiral, spiral
Central diameter is from centre to both ends Rearrangments.
The load envnlope line of the spring is cumulative type non-linear line, and is continuous or zonal cooling, and this is advantageous to
Prevent the generation of its resonance and flutter；The big I of pitch takes different pitches between each circle, 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 pitches not doubling-up helical spring is identical, and spiral central diameter is from centre to both ends Rearrangments.Pitches are not
Doubling-up helical spring plays support framework, has good nonlinear characteristic and a damping and amortization, is particularly carried in system during work
Lotus increase, it is mutated or can be played when overloading and doubling-up occurs and improve bearing capacity, increase system stiffness and noise reduction, noise reduction, vibration damping
Effect.
Set in embodiment the nonlinear characteristic line equation of main vibration spring as：
(1)
In formula：A system transient load in office and corresponding deformation,For undetermined coefficient.
According to system loading conditions, if the number of main vibration spring is n, the static load plastid quality that is determined by system can must be
Single spring institute is loaded during static load of uniting is
N
During system motion, maximum dynamic loading is suffered by single spring
N （2）
Above formula will consider at 2 points：
A. minimum load situation is static load scenario, and now single spring stress is。
B. additional load caused by each spring Dynamic And Static Loads and its uneven effect, takes each spring stand under load nonuniformity coefficient to be
1.4, Dynamic And Static Loads consider the experimental test situation of the not doubling-up of vibromill minimum rigidity coil spring, chooseMaximum
Dead load, cause maximum inertia force plus vibrating motor exciting, as maximum dynamic loading.
Three point coordinates of nonlinear characteristic line can be obtained accordingly, and then determine constant, obtain nonlinear characteristic line bullet
Spring deformation under load equation.According to vibrating mill engineering site situation and design experiences, shear modulus is takenG, allowable shear stress can be obtained, mean diameter of coil D, spring filament diameter d are chosen, looks into spring design manual, according to curling up ratio, curvature correction factor K is taken, then is calculated
Spring can be obtained and respectively enclose rigidity, spring rate before and after each circle doubling-up、, respectively enclose load during doubling-up, pitchDeng calculating knot
Fruit.Calculating process is carried out MATLAB programing operations, by changing mean diameter of coilDAnd spring filament diameterd, different springs can be obtained
Natural length H, spring-mass and displacement, it is ensured that spring not doubling-up under maximum load effect, the reasonability of assay.
From the foregoing, because pitch from both ends to centre is two-way incremental arrangement, therefore the 2nd, 6 circles have met maximum functional
Not doubling-up requirement under load, to ensure with certain safe clearance and pitches requirement, the spacing value ratio of the 3rd, 4,5 three circle
2nd, 6 circles are big, each circle deformation of springThere is following relation with the spacing of each circle：
（3）
Data above is substituted into the formula (1) for having determined that undetermined coefficient, revised spring load deformation characteristic equation can be obtained,
Thus two front and rear spring non-linear hard characteristic wire spring load of amendment and deformation curve can be made, as shown in Fig. 2 can by Fig. 2
Find out, revised curve has more preferable variation rigidity characteristic.Wherein, curve 1 is curve after amendment, and curve 2 is bent before amendment
Line.
Analyzed from Fig. 2, system variant increases and increased with system load under varions type load；Increase when load is mutated
During to certain value, always due to not reaching maximum dynamic loading, therefore spring will not doubling-up, now system variant increase and several with load
It is unchanged, obvious hardware features nonlinear characteristic is presented, this is beneficial to increase amplitude stability.
Rigidity before each circle doubling-up is plotted into curve as shown in Figure 4 with the rule of load change, as can be seen from Figure：It is single
Spring load from minimum load to maximum load in the range of the rigidity curve of load be approximately a straight line, i.e., now system stiffness with
Load is substantially linear.
Accordingly, the stability of hardware features nonlinear system amplitude can be further illustrated.By the natural frequency of vibration of spring
(4)
Analysis is understood, in variable mass system, when rigidity and load are linear change, thenωIt is still a constant, because this is
System is worked under Near resonance oscillating situation, and its amplitude near Near resonance oscillating area, known by (4) formulaIt is substantially constant,rFor the damped coefficient of system, change is also little, if now exciting forceFIt is substantially constant,ThenFor constant, therefore Near resonance oscillating state
Lower amplitude is substantially constant, and this just illustrates now system amplitude stability, and working condition is steady.
From the experiment of prototype design, under the high vibration intensity effect that system occurs, irregular pitch helical spring
Pitch variation by it is ascending be incremented by unidirectional array when, and the number of turns is more and noise is larger, and causes load to the inclined block system of two level
The Spline smoothing reaction of lotus is unstable；Pitch variation is by two-way incremental arrangement broad in the middle small in ends, and without the simultaneously number of turns, doubling-up is made an uproar
Sound is zero, and causes the Spline smoothing of load to react relatively stable to the inclined block system of two level；In view of the influence of high vibration intensity
And the stability of system vibration, therefore the design uses the latter.
Non-linear variable-pitch spring makes system stiffness change with load change, not only the feature with efficient energy-saving, together
When system amplitude can be made basicly stable.Therefore it is changed to fit as the normal spiral compression spring of main vibration spring during conventional vibration is ground
Suitable non-linear variable-pitch screw compression spring, can reach systems stabilisation amplitude, realizes the purpose of system high efficiency energy-conservation.
Isolation spring the present embodiment select rubber duck composite blocks, experiment prove with General Purpose Rubber spring,
Metal spring is compared, and its vibration isolating effect is considerably better, and not only vibration absorbing performance is good, noise is low, and simple in construction, good economy performance, tool
There is very high cost performance.
Claims (2)
- Simultaneously 1. coil spring bitubular double-mass vibrating is not ground pitches, including main vibrating system and vibrating isolation system, it is characterised in that：The main vibrating system includes being arranged on electric machine support by Frequency Converter Control（18）On motor（17）, exciter shaft （11）With motor（17）Outer shaft passes through shaft coupling（15）It is connected, the exciter shaft（11）It is arranged on support（1）On, it is described Exciter shaft（11）Support consolidation with upper cylinder（6）With lower cylinder（19）Between, plastid on composition, upper and lower mill tube is arranged on plastid On, connecting plate of the vibrator mounted in mill tube above and below upper plastid（7）Between, turn into the exciting source of whole grinding machine,The vibrating isolation system includes and main vibration spring group（3）The lower plastid of connection, the other end and isolation spring of the lower plastid （23）It is connected, the isolation spring（23）Pass through base（24）It is connected with ground；The main vibration spring group is made up of several pitches not doubling-up helical springs, each spring by a steel wire coil around structure and Into steel wire is wound into variable-pitch screw structure, and pitches not doubling-up helical spring at least 4 encloses the effective helix angle of the above, and has The central diameter of spiral is imitated to become central diameter spiral, central diameter is distributed in Rearrangments from the middle to both ends；The main vibration spring puts number row, edge and vibrating motor main axis parallel in vibromill along with vibrating motor main shaft vertical direction Direction is placed several rows, forms the uniform state of spring；The isolation spring（23）It is that isolation spring is made using composite（23）.
- 2. simultaneously coil spring bitubular double-mass vibrating is not ground pitches according to claim 1, it is characterised in that：The mill tube is situated between Matter is the medium size composition of two or more different densities.
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| CN113219843A (en) * | 2021-06-11 | 2021-08-06 | 武汉科技大学 | Self-adaptive control system and method for dynamic load of screen surface of vibrating screen |
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