CN107159401A - Simultaneously coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium - Google Patents
Simultaneously coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium Download PDFInfo
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- CN107159401A CN107159401A CN201710533891.0A CN201710533891A CN107159401A CN 107159401 A CN107159401 A CN 107159401A CN 201710533891 A CN201710533891 A CN 201710533891A CN 107159401 A CN107159401 A CN 107159401A
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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
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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
- B02C17/18—Details
- B02C17/24—Driving mechanisms
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- Crushing And Grinding (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention is that simultaneously coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium, including main vibrating system and vibrating isolation system, the main vibrating system includes being used as the vibrating motor of exciting source, at least one mill tube being connected with the vibrating motor and the balance weight body being connected with mill tube flange by Frequency Converter Control, the vibrating motor, the mill tube and the upper upper plastid of plastid frame composition, one end of lower plastid is connected with main vibration spring group, and the lower plastid is connected by the main vibration spring group with vibrating isolation system；The vibrating isolation system includes the isolation spring being connected with the lower plastid other end, and the isolation spring is connected by base with ground；The main vibration spring group is made up of several pitches not doubling-up helical springs.There is ultramicro powder refinement, de-agglomerated, powder product to be distributed that band narrows, energy consumption is low, mill efficiency is high, capacity usage ratio is high and effective accumulation of energy, energy-conservation, steady running, the features such as noise, vibration isolating effect are good is significantly reduced by the present invention.
Description
Technical field
For material fining powder the milling equipment prepared is vibrated the present invention relates to a kind of, be a kind of there are pitches not simultaneously
Coil spring, medium are the monotubular double-mass vibrating mill that hybrid density is matched, and belong to vibration using the interdisciplinary science with powder technology
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 generally 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 is few.Exciting source is typically using overhead, underlying
Formula, middle and side-mounted, for large-scale, super-huge vibration mill, especially based on side-mounted.
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 vibrating machine is generally used for linear line, for etc. rigidity spiral shell
Spring is revolved, the actual condition of mission nonlinear, such as jigging conveyer, vibrating scalper, vibrating mill is not accounted for, due to motion
The system load moment is all in change under state, therefore the stiffness helix spring such as uses, though there are simple in construction, low cost and other advantages, so
There is low big noise, power consumption height, efficiency, maintenance frequency height, 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, this hair
The introducing of bright variable-pitch spring, the need for 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 overcoming above-mentioned
The new grinding machine with efficient energy-saving of problem is not yet suggested so far.
The content of the invention
The present invention provides a kind of pitches, and simultaneously coil spring, hybrid density medium monotubular double-mass vibrating are not ground, with exciting
Device is the side located structure that vibrating motor is located at mill tube left or right side, and double mass technical characteristic, and main vibration spring is pitches
Not simultaneously coil spring, isolation spring is rubber duck complex spring, and master-isolation spring is variation rigidity；Jie's ball is ground in cylinder to improve
Impact, extruding, shearing in relative motion, the energy of collision, implement hybrid density medium size composition optimal design-aside, and existing wide
The general common single vibration grinding machine system used is compared, with obvious efficiency high, noise is small the features such as, it is intended to effectively solve existing
There is vibromill all the time, pendent noise is big, the low technical bottleneck problem of efficiency.
The novel side-mounted formula double-mass vibrating mill of the present invention takes following technology to realize：
The present invention is that simultaneously the side-mounted double-mass vibrating of coil spring and hybrid density medium is not ground pitches, including main vibrating system and every
Vibrating system, it is characterised in that：
The main vibrating system includes electric as the vibrating motor of exciting source, at least one and the vibration by Frequency Converter Control
The mill tube of machine connection and the balance weight body being connected with mill tube flange, the vibrating motor, the mill tube and the upper plastid frame group
Into upper plastid, one end of lower plastid is connected with main vibration spring group, and the lower plastid passes through the main vibration spring group and vibrating isolation system
It is connected；
The vibrating isolation system includes the isolation spring being connected with the lower plastid other end, and the isolation spring passes through base and ground
Base is connected；
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 described steel wire is wound into variable-pitch screw structure according to design data, and steel wire is wound into variable-pitch screw structure, pitches
Not doubling-up helical spring at least 4 encloses the effective helix angle of the above, and the central diameter of effective helix angle is becomes central diameter spiral, central diameter is from centre
Typically it is distributed to two ends in Rearrangments.
Side vibration mill of the present invention, the exciting of grinding machine comes from the direct effect of side-mounted vibrator, Yi Jiyu
The balance weight body of mill tube flange connection, balancing weight compensate for the eccentric structure of mill driving so that the mass centre of sky mill still in
On the axis of grinding cylinder, compared with the homogeneous circular vibration that conventional vibration is ground, vibromill of the present invention produces oval, circular and linear etc.
A variety of vibrations, making the unit power consumption of vibromill reduces about 50%, nearly 1 times of output increased, by kinematics model to grinding cylinder
Motion has carried out quantitative analysis, and the efficiency that side vibration is ground is confirmed by the experiment and detection of testing machine.
Side vibration grinds the mill capsule i.e. mill tube that at least one is supported on vibration component, vibrator part conduct
Oscillation drive is rigidly fixed on this container, and vibrator carries out exciting in one side to mill capsule, i.e., in mill capsule
To its exciting outside gravity axis and center of gravity, wherein, in order to balance one balance mass of vibrator quality settings i.e. balance weight body,
The axle of spring of driving side be located between grinding machine and the gravity axis of vibrator part, drive vibrator part, so as to produce by
The uneven vibration of circular, ellipse and linear combination of vibrations, makes the material particles with certain bandwidth, obtains mill and is situated between
Impact, collision, shearing that group is continually changing etc., to improve mill grinding efficiency.Further improvement of the present invention is：The master
The spring that shakes puts number row, edge and vibrating motor main axis parallel direction placement number in vibromill along with vibrating motor main shaft vertical direction
OK, the uniform state of spring is constituted.
Further improvement of the present invention is：The isolation spring is composite as rubber duck composite is made
Isolation spring.
Further improvement of the present invention is：The mill tube medium is two or more different proportioning.
Double-mass vibrating mill of the present invention is mainly made up of main vibrating system and vibrating isolation system, vibrating motor in main vibrating system
As exciting source, the purpose for becoming exciting force can be reached by Frequency Converter Control, what is be fixed together with vibrating motor is mill tube,
Both constitute upper plastid together with upper plastid frame, and lower plastid one end is connected with main vibration spring group, passes through main vibration spring group and vibration isolation
System is connected；In vibrating isolation system, the other end is connected with isolation spring, and isolation spring is connected by base with ground.After energization, by
Frequency Converter Control vibrating motor, to change exciting force, vibrating motor makees approximate circle vibration with mill tube so that ground in mill tube
The generation that is situated between is mutual to move, so, and cylinder is interior and sticks to mill Jie and the powder on barrel due to shock, friction to reach grinding
Purpose.The double-mass vibrating mill can significantly reduce vibromill master by two groups of springs of main vibration spring group and isolation spring
Oscillation intensity and noise that body is produced to ground, and reached the effect of energy-conservation, isolation spring be installed on lower plastid and base it
Between, base, by bolt group concrete mutually, can prevent moving horizontally for vibrating mill with ground.
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 conducive to preventing the generation of its resonance and flutter；Due to the change of central diameter, in the different pitches of identical steel wire diameter
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, it is considered to the condition of not doubling-up, can be achieved the not doubling-up of grinder system main vibration spring, the noise zero for producing spring doubling-up.
Due to the pitch variation of the helical structure of composition pitches not doubling-up helical spring, 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 pitches not doubling-up helical spring group formula double-mass vibrating mill, spring hangs down in vibromill along 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 constituted, so that vibromill is more preferable
Work.
The spring design of vibrational system, did not almost account for the factor of not doubling-up, both due to traditional design so far
Limitation, it is more and calculate numerous and diverse to there are influence not doubling-up associated technical parameters again, thus not only noise is big for system, and energy consumption
High, efficiency is low.According to the design feature of this spring, the condition of not doubling-up is analyzed and studied in present invention research from working mechanism,
The not doubling-up of main vibration spring in the grinder system course of work can be achieved, the noise zero for producing spring doubling-up
In the present invention, isolation spring can be made of rubber duck composite, and lower plastid passes through isolation spring and base and ground
Base is connected, because isolation spring has hard nonlinear characteristic, and its rigidity has the characteristics of changing with load change, therefore vibration damping is imitated
It is really good, preferable noise reduction can be obtained, the purpose of firm banking is mainly the shifting for preventing vibromill in the horizontal direction in face
It is dynamic.
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 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 the throwing of grinding process, collision process, due to its density of material difference
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, and necessarily causes it
Impact energy is greatly improved, 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：Vibrating mill of the present invention compared with common other non-side-mounted grinding machines, due to
The exciting of grinding machine comes from the direct effect of side-mounted vibrator, can produce grinding machine and be vibrated by circular, ellipse and linear
The uneven vibration combined, the material particles with certain bandwidth, can obtain grind group Jie be continually changing impact, touch
The effect such as hit, shear, to improve mill grinding efficiency；Vibrating mill of the present invention compared with common elemental body grinding machine, due to
With main vibrating isolation system, bigger exciting force on the one hand can be born, on the other hand can effectively reduce vibrating mill shakes to ground
Dynamic influence, reaches good energy-saving effect；The rigidity of the variable-pitch spring and rubber spring can be carried with grinder system maximum
The change of lotus and change, can not only have accumulation of energy, the effect of energy-conservation, and provide necessary condition for the coupled vibrations of main vibration isolation,
Not doubling-up of the main vibration spring under possible maximum load so that system noise is significantly reduced and dynamic stability is greatly increased, whole
Engine efficiency is obviously improved；It is close from medium compared with existing grinder system in the case of hybrid density medium size composition optimal design-aside
The examination of this angle is spent, it is even more apparent to improve the advantages such as high, the reduction energy consumption of system effectiveness.
The effect of the present invention is positive, obvious and unique, and it has ultramicro powder refinement, de-agglomerated, powder product point
Strap 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 and makes an uproar
The features such as sound, vibration isolating effect are good.The above-mentioned technology of the present invention, is effectively solving existing vibromill pendent energy all the time
Consume in big, the low technical bottleneck problem of efficiency, the step crossed over will be realized.
Brief description of the drawings
Fig. 1 is vibromill structural representation of the embodiment of the present invention.
Fig. 2 is the moulding figure of main vibration spring of the embodiment of the present invention.
Fig. 3 is that two spring characteristic curves compare before and after amendment of the embodiment of the present invention.
Fig. 4 is main vibration spring of embodiment of the present invention rigidity and load matched curve figure.
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.
It is vibration milling machine structure sketch of the present invention shown in Fig. 1, grinding machine mainly has isolation spring 1, lower plastid 2, main vibration spring
3, spring guide pillar 4, balance weight body 5, mill tube 6, vibrating motor 7, upper plastid frame 8, base 9 is constituted.Jie's packing factor is ground in cylinder
65% is set to, mill tube medium is abrasion-proof steel ball, wolfram steel ball, and two kinds of mill betweenness amount ratios are 6:4, a diameter of 2 mm of mill Jie, 3.5 mm, 5
Mm, 6.5mm, material are superhard fine powder body, and grinding machine vibration frequency is 1450 rpm, surveys amplitude<22mm, shakes strong<20.
As shown in figure 1, the vibration produced by the vibrating motor on the right side of cylinder, plastid and mill tube in direct drive,
Mill tube is built with medium ball and powder, and vibration makes the mill such as steel ball in mill tube be situated between to material generation collision, impact, shearing, extruding
With rub mill with the hands, reach material is crushed and fine grinding purpose, it is of the invention to be mainly characterized by exciting force, amplitude, frequency, shake by force
It is big Deng parameter variation range, its size, action time can be control effectively by frequency converter.
As shown in figure 1, the upper plastid of vibration direct drive and mill tube produced during vibrating motor rotation, mill tube is built with Jie
Matter and powder, vibration make the mill such as steel ball in mill tube be situated between to produce material collision, impact, shearing, extruding and rubbing with the hands and grind, reach to thing
Material progress crushing and the purpose of fine grinding, the level that Jie is ground by adjusting the angle of the inclined block of major-minor, change match somebody with somebody selection, implementation VFC
Deng measure, certain frequency high amplitude, Gao Zhenqiang vibration crushing effect needed for can producing.
Plastid is main on grinding machine of the present invention is made up of upper plastid frame, vibrating motor, mill tube, balance weight body consolidation, cylinder built with
Mill is situated between and powder, is connected up and down between plastid with main vibration spring, and main vibration spring upper and lower side is equipped with spring short guiding column, with guarantee
The stability that plastid vibrates in vertical；Lower to be connected between plastid and base with isolation spring, base is with ground with bolt
Concrete mutually.Under working condition, it can be changed exciting force by Frequency Converter Control vibrating motor by changing transient state rotational frequency, entered
And change amplitude, shake strong change curve, reaches the purpose of efficient grinding.
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.
As shown in Fig. 2 pitches not doubling-up helical spring by a steel wire coil around constituting, described steel wire coil by design around
Into variable-pitch screw structure, the Parameters variation such as design visible system quality, exciting force of variable-pitch spring is improved, pitches
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 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：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 pitches not doubling-up helical spring is identical, and spiral central diameter is from centre to two ends Rearrangments.Pitches are 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.
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 determined by system can must be
Single spring institute is loaded during system static load is
N
During system motion, maximum dynamic loading is suffered by single spring
N （2）
Above formula will consider at 2 points：
(1) minimum load situation is static load scenario, and now single spring stress is。
(2) additional load caused by each spring Dynamic And Static Loads and its uneven effect, takes each spring stand under load nonuniformity coefficient
For 1.4, the experimental test situation of the not doubling-up of Dynamic And Static Loads consideration vibromill minimum rigidity coil spring, selectionMost
Big dead load, adds vibrating motor exciting and causes maximum inertia force, it is used 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, spring design manual is looked into, according to curling up ratio, curvature correction factor K is taken, then calculating can
Obtain spring and respectively enclose rigidity, spring rate before and after each circle doubling-up、, load during each circle doubling-up, pitchDeng calculating
As a result.Calculating process is carried out MATLAB programing operations, by changing mean diameter of coilDAnd spring filament diameterd, different bullets can be obtained
Spring natural length H, spring-mass and displacement, it is ensured that spring not doubling-up, the reasonability of assay under maximum load effect.
From the foregoing, because pitch from two ends to centre be two-way incremental arrangement, therefore the 2nd, 6 enclose 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
The two spring non-linear hard characteristic wire spring load and deformation curve before and after correcting can be made, as shown in figure 3, as can be seen from Figure,
Revised curve has more preferable variation rigidity characteristic.Wherein, curve 1 is curve after amendment, and curve 2 is curve before amendment.
Analyzed from Fig. 3, 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 is linear change with load, thenωIt is still a constant, because the system is
Worked under Near resonance oscillating situation, and its amplitude near Near resonance oscillating area, by (4), formula is knownIt is substantially constant, rTo be
The damped coefficient of system, changes also little, if now exciting forceFIt is substantially constant,ThenFor constant, therefore amplitude under Near resonance oscillating state
Substantially constant, 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 two grades of inclined block systems
The Spline smoothing reaction of lotus is unstable；Pitch variation presses 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 two grades of inclined block systems；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 crate tire, 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 (4)
- Simultaneously 1. coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium, including main vibrating system and vibration isolation system System, it is characterised in that：The main vibrating system includes electric as the vibrating motor of exciting source, at least one and the vibration by Frequency Converter Control The mill tube of machine connection and the balance weight body being connected with mill tube flange, the vibrating motor, the mill tube and the upper plastid frame group Into upper plastid, one end of lower plastid is connected with main vibration spring group, and the lower plastid passes through the main vibration spring group and vibrating isolation system It is connected；The vibrating isolation system includes the isolation spring being connected with the lower plastid other end, and the isolation spring passes through base and ground Base is connected；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 described steel wire is wound into variable-pitch screw structure according to design data, and steel wire is wound into variable-pitch screw structure, pitches Not doubling-up helical spring at least 4 encloses the effective helix angle of the above, and the central diameter of effective helix angle is becomes central diameter spiral, central diameter is from centre Typically it is distributed to two ends in Rearrangments.
- 2. simultaneously coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium according to claim 1, it is special Levy and be：The main vibration spring puts number row, edge and vibrating motor main shaft in vibromill along with vibrating motor main shaft vertical direction Parallel direction is placed several rows, constitutes the uniform state of spring.
- 3. simultaneously coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium according to claim 1, it is special Levy and be：The isolation spring is the isolation spring that composite is made.
- 4. simultaneously coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium according to claim 1, it is special Levy and be：The mill tube medium is two or more different proportioning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710533891.0A CN107159401A (en) | 2017-07-03 | 2017-07-03 | Simultaneously coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium |
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| CN201710533891.0A CN107159401A (en) | 2017-07-03 | 2017-07-03 | Simultaneously coil spring is not ground pitches with the side-mounted double-mass vibrating of hybrid density medium |
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|---|---|
| CN (1) | CN107159401A (en) |
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Application publication date: 20170915 |