CN106423834B - A kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen - Google Patents
A kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen Download PDFInfo
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- CN106423834B CN106423834B CN201610817262.6A CN201610817262A CN106423834B CN 106423834 B CN106423834 B CN 106423834B CN 201610817262 A CN201610817262 A CN 201610817262A CN 106423834 B CN106423834 B CN 106423834B
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- girder
- indeterminate
- floating
- sieve nest
- screen frame
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/286—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens with excentric shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4645—Screening surfaces built up of modular elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4654—Corrugated Screening surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/02—Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces
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- Combined Means For Separation Of Solids (AREA)
Abstract
A kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen, including sieve nest, spring support seat, damping spring, motor, holder, the indeterminate exciting girder being made of Guan Liang and fixed plate, sieve nest is equipped with floating screen frame, sieve nest and floating screen frame are equipped with elastic screen surface, and floating screen frame is installed on the lower part of sieve nest by rubber hinge suspension, and floating screen frame can be such that elastic polyurethane compass screen surface swings up and down under the action of material, accelerate the material speed of service, avoids load concentration；Elastic polyurethane compass screen surface is linked to be by multiple rectangle sieve plates, and the both ends of every piece of sieve plate are separately mounted on the fixed cross beam of sieve nest and the floating crossbeam of floating screen frame.Using rubber hinge suspension connection between floating screen frame and sieve nest, amplitude adjustment spring is installed between the two.Vibrator is arranged in inside side plate and indeterminate girder.Its is compact-sized, and reliability is high, convenient for adjusting flip flop screen forms of motion and working amplitude, is best suited for the dry deep-sizing of coal preparation plant's moist fine particulate coal.
Description
Technical field
The present invention relates to a kind of oscillatory type flip flop screens, especially a kind of indeterminate modularization girder suitable for coal screening
Adjustable amplitude low-frequency vibration flip flop screen, belongs to coal preparation machine technical field.
Background technology
Screening is the important link of Coal dressing.Vibrating screen is obtained in coal preparation plant as coal screening equipment and is answered extensively
With.With the application of raw coal fully mechanized mining automatic technology, raw coal degree of crushing improves, and hydraulic coal mining, underground water spray are dust-proof etc. in addition
The application of measure causes fine fraction component and moisture in raw coal to increase, and often leads to Bed for Fine Coal and bonds agglomerating, the stifled sieve of paste
Face.To this kind of moist fine particulate coal, common Vibration Screen component efficiency is low, it is difficult to carry out effective deep dry screening.
Oscillatory type flip flop screen is a kind of novel screening plant of processing wetted coal fines, compares common vibrating screen, vibration relaxes
It opens sieve to be made of sieve nest and floating screen frame, be flexibly connected between the two.Sieve nest is of reciprocating vibration under vibrator effect, forms master and shakes
Dynamic, according to dynamics subresonance principle, there are Relative Vibrations between floating screen frame and sieve nest, form additional movement.Its compass screen surface is adopted
It is made of polyurethane elastomeric materials, compass screen surface both ends are separately fixed on sieve nest and floating screen frame, in the effect of the two Relative Vibration
Under, compass screen surface slack-taut forms periodic tension and relaxation movement, thus to obtain higher throwing acceleration and larger sieve pore
Deflection prevents solid accumulation, adherency.
At present in oscillatory type flip flop screen design field, circular vibration flip flop screen and straight can be generally divided by forms of motion difference
Linearly coupled flip flop screen.Application No. is 2014108478863,2013200375643 patent documents to disclose a kind of single layer tension and relaxation
Sieve-type screening plant, application No. is 2014108550974,2014208681285 patent documents to disclose a kind of multilayer tension and relaxation
Sieve-type screening plant, structure disclosed in these patent documents is similar to circular shale shaker, and common feature is using single eccentric
Block exciter drives, and vibrator is fixed across side plate, and exciting force acts directly on side plate；Sieve nest makees class circular vibration, and float sieve
Frame is connect with sieve nest using shear-type rubber spring, and opposite sieve nest makees reciprocating translatory.From the point of view of sieving technology angle, the place of circular motion
Reason amount is significantly, simple in structure, but material is conveyed on compass screen surface, layered effect it is poor, when installation, needs certain inclination angle, occupies empty
Between it is excessive.Rubber shear spring rubber after the effect for bearing reciprocating shear for a long time is easy tearing.Meanwhile the work of shearing force
It with making rubber generate heat, hardens and becomes fragile so as to cause rubber, fail, reduce the reliability of vibration flip flop screen.In addition, this kind of shake
Dynamic flip flop screen will realize low frequency（《600r/min）When large amplitude, the rigidity for reducing rubber shear spring is needed, and this can be limited
Floating screen frame bearing capacity, therefore the mutual restriction of the rigidity and floating screen frame bearing capacity by rubber shear spring, often work
Make in upper frequency, and traditional crank-linkage type flip flop screen, according to field experience, working frequency is generally in 600r/min or less
Preferable screening effect can be obtained.
Application No. is 2014107970494 patent documents to disclose a kind of quickly removal bulk materials oscillatory type tension and relaxation
It sieves, floating screen frame is installed with sieve nest using rubber hinge suspension, and service life and maintainability are substantially carried compared with rubber shear spring
Height, but amplitude adjusts inconvenience, cannot be well adapted for operating mode variation.
Application No. is 2014203021895 patent documents to disclose a kind of flip flop screen using box vibrator, knot
Structure is similar to straight-line oscillation banana screen, and sieve nest makees class linear motion under vibrator effect, there is preferable conveying to make material
With, it can be horizontally disposed, overcome the big defect of circular vibration flip flop screen setting angle.But its box vibrator is fixed on master
Liang Shang, to bear the exciting force of vibrator generation, girder size and weight are larger, and there are larger structure deadweights, and energy consumption is higher,
It is unfavorable for vibrating the enlargement of flip flop screen.
The patent document of application number 2013107281514 proposes a kind of banana tension and relaxation screen without girder, equally uses box
Vibrator alleviates architecture quality because vibrator is directly installed at the top of sieve nest side plate.But due to being concentrfated load, to ensure
The stability of flip flop screen operation, therefore consistency to both sides exciting force and side plate machining accuracy, intensity requirement are higher.
The patent document of application number 200710019307.6 proposes a kind of double-group static-indeterminant mesh-beam exciting-vibration plate board assembling
The super-huge vibrating screen of spandrel girder preferably overcomes the defect of traditional girder using net beam body redundant structure as girder, fits
Enlargement is closed, but its main beam structure form is fixed, and can only realize single linear motion.
Application No. is 2015205282540 patent documents to disclose a kind of flip flop screen segmented walking beam amplitude adjusting dress
It sets, is adjusted to change the scope of activities of floating screen frame by the pretightning force to shear-type rubber spring, is adapted to difference
Working condition requirement is limited by rubber spring intensity, and amplitude adjustable range is little.Application No. is 2015203736591 patent documents
Segmentation amplitude adjustable Banana Type vibration flip flop screen is proposed, floating screen frame is divided into multistage, according to actual needs, passes through dismounting
Or the shear-type rubber spring of each section of replacement, it can be with separately adjustable each section of compass screen surface amplitude, but pass through and change rubber block number destination party
Method carrys out adjusting amplitude, cannot achieve the step-less adjustment of amplitude, if dismounting number is excessive, often influences the carrying energy of floating screen frame
Power.
Existing flip flop screen is primarily present problem and has in summary：1）Thus spring is caused easily to tear using shear-type rubber spring
It splits, send out or enabling capabilities are inadequate；Shear-type rubber spring rigidity, structure and enabling capabilities limit low frequency operation ability 2）Excitation beam of vibration
The complicated manufacturing issue for overcoming the problems, such as insufficient rigidity and being brought using box vibrator is difficult in large span size；3）It is floating
It is inconvenient that dynamic screen frame amplitude is adjusted, and often changes floating screen frame bearing capacity when cannot achieve step-less adjustment, and reconciling.4）Vibration
Compass screen surface service life is short.
Invention content
Technical problem：The purpose of the present invention is overcoming the shortcoming in prior art, provide a kind of simple in structure, reliable
Property it is high, energy consumption is low, is easy to enlargement, the indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen of good operation stability.
Technical solution：The indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen of the present invention, including sieve nest, spring
Support base, damping spring, motor, holder, the indeterminate exciting girder being made of Guan Liang and fixed plate, the sieve nest pass through bullet
Spring support base is mounted on damping spring, and the sieve nest is equipped with floating screen frame, and sieve nest and floating screen frame are equipped with elasticity and sieve
Face, floating screen frame are installed on the lower part of sieve nest by rubber hinge suspension, and floating screen frame can make polyurethane under the action of material
Elastic screen surface is swung up and down, and is accelerated the material speed of service, is avoided load concentration；
The sieve nest includes left plate, right plate, rear baffle, more fixed cross beams for connecting left and right side plates and reinforcement
Beam, more fixed cross beams are located at the lower part of sieve nest, and reinforcing beam is located at the top of sieve nest, and the middle part between the left side plate is equipped with
For single group or the indeterminate exciting girder of double groups of eccentric block vibration exciters；
The eccentric block vibration exciter includes transmission shaft and multiple eccentric blocks for being located on transmission shaft, multiple eccentric blocks dispersions
In the fixed plate inside left side plate and indeterminate exciting girder, transmission shaft one end of eccentric block vibration exciter passes through shaft coupling
Device is connected with rack-mount motor；
The floating screen frame includes curb girder, floating crossbeam and spring fastening, and the both ends of floating crossbeam pass through flange and side
Beam connects, and constitutes frame structure；Floating crossbeam and the fixed cross beam of sieve nest lower part alternate arrangement；
The elastic screen surface includes polylith rectangle sieve plate and card slot band, and the both sides of the rectangle sieve plate are equipped with buckle side,
The card slot is equipped with the card slot being interlocked with rectangular mesh screen board button side with both sides, and middle part is equipped at intervals with multiple mounting holes, passes through
Rectangle sieve plate fastening is linked together by card slot band, and each card slot band is separately mounted to fix through backing plate, press strip, bolt and Rust-inhibiting nut
On crossbeam and floating crossbeam.
The curb girder rear and front end of the floating screen frame is equipped with amplitude limit spring.
The rubber hinge connection length can be by individually or simultaneously changing each rubber hinge connection length, adjusting amplitude
Limit spring rigidity or the working amplitude for changing floating screen frame, adapt to different operating modes and are adjusted.
The elastic screen surface is elastic polyurethane compass screen surface.
The height of the floating crossbeam and fixed cross beam in the same plane, or not in same level；
The indeterminate exciting girder is the indeterminate exciting master of circular configuration for installing single group eccentric block vibration exciter
Beam, or the indeterminate exciting girder of regular polygon structure for installing double group eccentric block vibration exciters.
The indeterminate exciting girder of the circular configuration is made of polylith circle fixed plate and Duo Gen A pipe beams, and polylith is round
A concentric circle holes are had in the middle part of fixed plate, more A pipe beams, which circularize to be uniformly distributed, to be fixed in round fixed plate, structure
At circular net girder construction.
The indeterminate exciting girder of the regular polygon structure includes polylith regular polygon fixed plate and Duo Gen B pipe beam structures
At having two concentric circle holes in polylith regular polygon fixed plate, more B pipes beams are fixed at regular polygon is symmetrical
In regular polygon fixed plate, regular polygon net girder construction is constituted.
Advantageous effect：The present invention passes through the rigidity of metal spring before and after change floating screen frame and the company of adjusting rubber hinge
Spreading degree, thus it is possible to vary vibrate the kinetic parameter of flip flop screen, the working amplitude to step-less adjustment floating screen frame with respect to sieve nest.
Since this adjusting does not change the connection relation of floating screen frame and sieve nest, the bearing capacity of floating screen frame will not be reduced.It adjusts
The connection length of section rubber hinge can be such that the floating crossbeam of floating screen frame and the fixed cross beam of sieve nest is on different level, and
Polyurethane sieve plate is separately fixed on fixed cross beam and floating roof crossbeam, thus can change the curved shape of polyurethane sieve plate, different
Curved shape material movement state can be impacted, be conducive to adapt to different material or working condition requirement.The present invention is in sieve nest
Left side plate top is connected using indeterminate exciting girder, and vibrator dispersion is solid mounted on the inside of left side plate and exciting girder
On fixed board, indeterminate exciting girder plays the role of connecting left side plate simultaneously and provides exciting force, reduces structure deadweight.
Under same exciting force, in such a way that vibrator adopts dispersion installation, the rigidity of structure can be made full use of to avoid concentrfated load, prevented
Only stress raisers.Single vibrator volume can be reduced simultaneously, it is compact-sized, adapt to vibrating screen enlargement requirement.It is super quiet
Determine structure exciting girder and be adapted to wider compass screen surface width, is conducive to the enlargement for vibrating flip flop screen.It can be according to technological requirement
Difference retains Guan Liang, only by replacing the fixed plate of different structure, is assembled into various forms of exciting girders, realizes circular vibration
Exciting or straight-line oscillation exciting, flexibility is strong, cost-effective.
Floating screen frame is suspended on sieve nest lower part using rubber hinge, rubber hinge assigns the reciprocally swinging of floating screen frame,
Large carrying capacity avoids the rubber brought when floating screen frame is embedded in sieve nest by General Oscillation flip flop screen using shear-type rubber spring
The tearing of glue fatigue, the hard crisp phenomenon of fever.The front and back amplitude limit spring installed of floating screen frame can effectively inhibit floating screen frame
Movement on other directions prevents the rubber element in rubber hinge from generating large deformation, enhances the running stability of flip flop screen
With the elastomeric element service life.
It can be by adjusting shaking before and after the length and change floating screen frame of rubber hinge coupling part in actual production
The rigidity of width limit spring adapts to different process demand to the amplitude of flexible modulation floating screen frame.Floating screen frame may be implemented
The step-less adjustment of working amplitude, while not changing its bearing capacity.
In addition, the length for changing rubber hinge coupling part can make the floating crossbeam of floating screen frame and the fixed cross of sieve nest
Beam is on different level, so change Polyurethane sieve curved shape, be conducive to material Polyurethane sieve rolling, touch
It hits, disintegrate, improve screening efficiency.The polyurethane sieve plate is non-uniform thickness structure, including bonding pad, transition region, workspace, no
Different thickness and cross-sectional shape are used with region, between working region and join domain that flip flop screen compass screen surface can be eliminated
Stress concentration phenomenon, improve the intensity of compass screen surface, extend the service life；Both ends are mounted on fixed cross beam and floating using fastening type structure
Simple in structure on crossbeam, reliability is high, convenient for disassembly and assembly, repairing easy to maintain.
Description of the drawings
Fig. 1 is one structural schematic diagram of the embodiment of the present invention；
Fig. 2 is two structural schematic diagram of the embodiment of the present invention；
Fig. 3 is the primary structure axis geodesic structure schematic diagram of Fig. 1；
Fig. 4 is the primary structure axis geodesic structure schematic diagram of Fig. 2；
Fig. 5 is that the primary structure side view of Fig. 1 shows that structure is intended to；
Fig. 6 is that the primary structure side view of Fig. 2 shows that structure is intended to；
Fig. 7 is that the floating screen frame axis of the present invention measures structure intention；
Fig. 8 is the indeterminate modular exciting main beam structure axonometric schematic diagram in Fig. 1；
Fig. 9 is the indeterminate modular exciting main beam structure axonometric schematic diagram in Fig. 2；
Figure 10 is the compass screen surface buckle fixed form schematic diagram of the present invention；
Figure 11 is the compass screen surface and crossbeam fixed form schematic diagram of the present invention；
Figure 12 is the notch schematic diagram of the present invention；
Figure 13 is the compass screen surface schematic diagram of the present invention；
Figure 14 is the compass screen surface side view of the present invention；
Figure 15 is schematic diagram when the floating crossbeam of the present invention and fixed cross beam are in same level；
Figure 16 is schematic diagram when the floating crossbeam of the present invention and fixed cross beam are in different level.
Specific implementation mode
The invention will be further described for embodiment in below in conjunction with the accompanying drawings：
Embodiment 1, as shown in Figure 1, the present invention indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen, mainly
By sieve nest 1, elastic screen surface 2, floating screen frame 3, rubber hinge 4, amplitude limit spring 5, spring support seat 6, damping spring 7, connection
Axis device 8, motor 9, holder 10 and indeterminate exciting girder composition.The sieve nest 1 is mounted on damping bullet by spring support seat 6
On spring 7, the sieve nest 1 is equipped with floating screen frame 3, and sieve nest 1 and floating screen frame 3 are equipped with elastic screen surface 2, and floating screen frame 3 is logical
It crosses rubber hinge 4 and hangs the lower part for being installed on sieve nest 1, floating screen frame 3 can make under the action of material on elastic polyurethane compass screen surface 2
Lower swing accelerates the material speed of service, avoids load concentration；The rear and front ends curb girder 3-1 of the floating screen frame 3, which are equipped with, to shake
Width limit spring 5 can replace different-stiffness spring as needed；4 connection length of rubber hinge can be by independent or same
When change 4 connection length of each rubber hinge, 5 rigidity of adjusting amplitude adjustment spring, change floating screen frame working amplitude, adapt to not
It is adjusted with operating mode.The indeterminate exciting girder is the regular polygon structure for installing double group eccentric block vibration exciters 11
Indeterminate exciting girder.The peace of rubber hinge is respectively disposed on 1 left side plate of sieve nest and floating screen frame curb girder corresponding position
Seat 12,13 is filled, floating screen frame 3 is hung on by rubber hinge 4 on sieve nest 1 using mounting base 13.4 coupling part of rubber hinge
Length is adjustable.
Shown in Fig. 3, the sieve nest 1 includes left plate 1-1, right plate 1-5, rear baffle 1-4, connection left and right side plates
More fixed cross beam 1-3 and reinforcing beam 1-6, more fixed cross beam 1-3 are located at the lower part of sieve nest 1, and reinforcing beam 1-6 is located at sieve nest 1
Top, the middle part between the left side plate is equipped with the indeterminate exciting girders for double group eccentric block vibration exciters 11, double groups
Eccentric block vibration exciter, which reversely rotates, can be achieved straight-line oscillation excitation.
Shown in Fig. 3 Fig. 5, the eccentric block vibration exciter 11 includes two transmission shafts and is located at multiple on two transmission shafts
Eccentric block, multiple eccentric blocks are divided into two classes and include the side plate eccentric block 11-1 being mounted on left plate 1-1 and right plate 1-5 and divide
Dissipate the inside eccentric block 11-2 in the fixed plate inside indeterminate exciting girder, the transmission shaft one of eccentric block vibration exciter 11
End is connected by shaft coupling 8 with the motor 9 of installation over the mount 10；
Shown in Fig. 7, the floating screen frame 3 includes curb girder 3-1, floating crossbeam 3-2 and spring fastening 3-3, floating crossbeam
The both ends of 3-2 are connect by flange with curb girder 3-1, and frame structure is constituted；1 lower parts left and right side plate 1-1,1-5 corresponding position of sieve nest
Arrange jagged, the floating crossbeam 3-2 of floating screen frame passes through notch to be alternateed with the fixed cross beam 1-3 for being located at 1 lower part of sieve nest
Arrangement.According to the variation of 4 connection length of rubber hinge, floating crossbeam 3-2 and fixed cross beam 1-3 can be located at difference in height
On horizontal plane.Floating screen frame curb girder rear and front end is equipped with spring fastening 3-3, and spring fastening has been equipped with adjusting amplitude effect
Spring 5, the spring other end are fixed on the spring fastening 1-7 of sieve nest, different according to floating screen frame amplitude requirement, and spring 5 is removable
Unload or replace the spring of different-stiffness.According to actual needs, in addition to the rear and front end of floating screen frame curb girder, spring 5 can also pacify
Between the middle part of floating screen frame curb girder and main sieve nest side plate.The fixed cross beam of flip flop screen and floating crossbeam interlaced arrangement are
Convenient for pan feeding and discharge, make positioned at the feeding end of sieve nest 1 and the crossbeam of discharge end to be fixed cross beam.
Shown in Fig. 8, the indeterminate exciting girder of the regular polygon structure includes polylith regular polygon fixed plate 1-2a-2
It is constituted with more B pipe beam 1-2 a-1, polylith regular polygon fixed plate 1-2a-2 is 2-6 blocks, is set according to the width requirement of sieve nest 1
Fixed, the fixed plate of example is 4 pieces in figure.Two perforative concentric circles are had on polylith regular polygon fixed plate 1-2a-2
Hole, more B pipes beam 1-2 a-1 are fixed at regular polygon is symmetrical on polylith regular polygon fixed plate 1-2a-2, are constituted just
Polygon latticed girder construction.All Guan Liang are arranged around eccentric block vibration exciter 11, form clad structure, while playing connection left and right sides
Plate and the effect for transmitting exciting force.
Shown in Figure 10 to Figure 14, the Polyurethane sieve 2 is made of the splicing of multiple polyurethane rectangle sieve plates, every piece of sieve plate
Both ends are separately mounted on the floating crossbeam 3-2 on the fixed cross beam 1-3 and floating screen frame of 1 lower part of sieve nest.Elastic screen surface 2 includes
The both sides of polylith rectangle sieve plate 2-1 and card slot band 2-2, rectangle sieve plate 2-1 are equipped with buckle side, and the both sides card slot band 2-2 are equipped with and square
The card slot that shape sieve plate 2-1 buckle side is interlocked, middle part are equipped at intervals with multiple mounting holes, by card slot band 2-2 by rectangle sieve plate 2-1
Fastening is linked together, and each card slot band 2-2 is separately mounted to fix through backing plate 2-4, press strip 2-3, bolt 2-6 and Rust-inhibiting nut 2-5
On crossbeam 1-3 and floating crossbeam 3-2.The elastic screen surface 2 is elastic polyurethane compass screen surface, and polyurethane rectangle sieve plate is integral
Symmetrical structure, including bonding pad, transition region, workspace, different zones use varying cross-section shape, and bonding pad is located at sieve plate two
End is responsible for compass screen surface with crossbeam being connected, and workspace is the part that sieve pore is provided on sieve plate, realizes screening function, bonding pad thickness
More than workspace thickness, transition region is used to connect between the two.Sieve plate both ends by buckle structure be mounted on fixed cross beam 1-3 and
On floating crossbeam 3-2.
Shown in Figure 15, Figure 16, the height and position of the floating crossbeam 3-2 and fixed cross beam 1-3 can be in same planes
On, it can not also be in the same plane.
Shown in embodiment two, Fig. 2, it is identical with embodiment 1, and something in common is omited.Difference：Described is indeterminate sharp
The girder that shakes is the indeterminate exciting girder of circular configuration for installing single group eccentric block vibration exciter 11, and single group eccentric block vibration exciter can
Realize circular vibration excitation.
Shown in Fig. 4 Fig. 6, the eccentric block vibration exciter 11 includes a transmission shaft and is located at multiple inclined on the transmission shaft
Heart block, multiple eccentric blocks include that the side plate eccentric block 11-1 being mounted on left plate 1-1 and right plate 1-5 and dispersion are mounted on and surpass
Inside eccentric block 11-2 in fixed plate inside static determinacy exciting girder, transmission shaft one end of eccentric block vibration exciter 11 pass through shaft coupling
Device 8 is connected with the motor 9 of installation over the mount 10；Shown in Fig. 9, the indeterminate exciting girder of the circular configuration is by polylith circle
Fixed plate 1-2b-2 and Duo Gen A pipe beams 1-2b-1 is constituted, and polylith circle fixed plate 1-2b-2 is 2-6 blocks, according to the width of babinet 1
It is required that being equipped with, example is in figure, 4 pieces.A concentric circle holes, more A are had in the middle part of polylith circle fixed plate 1-2b-2
Pipe beam 1-2b-1 is circularized to be uniformly distributed and is fixed on round fixed plate 1-2b-2, constitutes circular net girder construction.All Guan Liang enclose
It is arranged around eccentric block vibration exciter 11, forms clad structure.
Operation principle：For when installing double group eccentric block vibration exciters, motor 9 is located at by yielding coupling drive
Eccentric block vibration exciter rotation inside 1 side plate of sieve nest and indeterminate exciting girder in fixed plate, generates linear reciprocation exciting force.Make
The sieve nest opposing bottom surface of vibration flip flop screen makees the reciprocating motion of near linear.Due to floating screen frame and sieve nest by rubber hinge and
Amplitude adjustment spring elastic connection, according to principle of dynamics, under inertia force and elastic force, moment loading, floating screen frame 3 is with rubber
The reciprocally swinging of glue hinge makees periodic relative motion with main sieve nest, to make the floating crossbeam being mounted on floating screen frame and sieve
The fixed cross beam of body 1 periodically " close "-" separate "-" close ".Since 2 both ends of elastic sieve plate of polyurethane are separately fixed at
On fixed cross beam 1-3 and floating crossbeam 3-2, therefore entire compass screen surface each property regional cycle relaxation-tensioning-under the drive of crossbeam
Relaxation generates higher throwing acceleration and larger sieve pore deflection, prevents fine moist material to realize that tension and relaxation moves
Accumulation, adherency.
Claims (8)
1. a kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen, including sieve nest (1), spring support seat (6), subtract
Shake spring (7), motor（9）, holder（10）, the indeterminate exciting girder being made of Guan Liang and fixed plate, the sieve nest（1）It is logical
Spring support seat (6) is crossed on damping spring (7), it is characterised in that：The sieve nest (1) is equipped with floating screen frame (3),
Sieve nest (1) and floating screen frame (3) are equipped with elastic screen surface (2), and floating screen frame (3) passes through rubber hinge（4）Suspension is installed on sieve
Body（1）Lower part, under the action of material elastic polyurethane compass screen surface (2) can swing up and down floating screen frame (3), accelerate material fortune
Scanning frequency degree, avoids load concentration；
The sieve nest（1）Including left plate (1-1), right plate (1-5), rear baffle (1-4), connect more of left and right side plates
Fixed cross beam (1-3) and reinforcing beam (1-6), more fixed cross beams (1-3) are located at sieve nest（1）Lower part, reinforcing beam (1-6) is located at
Sieve nest（1）Top, the middle part between the left side plate, which is equipped with, is used for single group or double groups of eccentric block vibration exciters（11）It is super quiet
Determine exciting girder；
The eccentric block vibration exciter（11）Including transmission shaft and the multiple eccentric blocks being located on transmission shaft, multiple eccentric block dispersions
In the fixed plate inside left side plate and indeterminate exciting girder, eccentric block vibration exciter（11）Transmission shaft one end pass through
Shaft coupling（8）With mounted on holder（10）On motor（9）It is connected；
The floating screen frame（3）Including curb girder（3-1）, floating crossbeam（3-2）And spring fastening（3-3）, floating crossbeam（3-2）
Both ends pass through flange and curb girder（3-1）Connection constitutes frame structure；Floating crossbeam（3-2）With sieve nest（1）The fixed cross of lower part
Beam（1-3）Alternate arrangement；
The elastic screen surface（2）Including polylith rectangle sieve plate（2-1）With card slot band（2-2）, the rectangle sieve plate（2-1）Two
Side is equipped with buckle side, the card slot band（2-2）Both sides are equipped with and rectangle sieve plate（2-1）The card slot that buckle side is interlocked, middle part
Multiple mounting holes are equipped at intervals with, card slot band is passed through（2-2）By rectangle sieve plate（2-1）Fastening is linked together, each card slot band（2-2）Through
Backing plate（2-4）, press strip（2-3）, bolt（2-6）And Rust-inhibiting nut（2-5）It is separately mounted to fixed cross beam (1-3) and floating crossbeam
On (3-2).
2. a kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, feature exist
In：The floating screen frame（3）Curb girder（3-1）Rear and front end is equipped with amplitude and adjusts limit spring（5）.
3. a kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, feature exist
In：The rubber hinge（4）Connection length can be by individually or simultaneously changing each rubber hinge（4）Connection length, adjusting are shaken
Width adjustment spring（5）Rigidity or the working amplitude for changing floating screen frame, adapt to different operating modes and are adjusted.
4. a kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, feature exist
In：The elastic screen surface（2）For elastic polyurethane compass screen surface.
5. a kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, feature exist
In：The floating crossbeam（3-2）And fixed cross beam（1-3）Height in the same plane, or not in same level.
6. a kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, feature exist
In：The indeterminate exciting girder is for installing single group eccentric block vibration exciter（11）The indeterminate exciting master of circular configuration
Beam, or for installing double group eccentric block vibration exciters（11）The indeterminate exciting girder of regular polygon structure.
7. a kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen according to claim 6, feature exist
In：The indeterminate exciting girder of the circular configuration is by polylith circle fixed plate（1-2b-2）With more A pipe beams（1-2b-1）Structure
At polylith circle fixed plate（1-2b-2）Middle part have a concentric circle holes, more A pipe beams（1-2b-1）It circularizes
Even distribution is fixed on round fixed plate（1-2b-2）On, constitute circular net girder construction.
8. a kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen according to claim 6, feature exist
In：The indeterminate exciting girder of the regular polygon structure includes polylith regular polygon fixed plate（1-2a-2）With more B pipe beams
（1-2 a-1）It constitutes, polylith regular polygon fixed plate（1-2a-2）On have two concentric circle holes, more B pipe beams（1-2
a-1）It is fixed on regular polygon fixed plate at regular polygon is symmetrical（1-2a-2）On, constitute regular polygon net girder construction.
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| CN201610817262.6A CN106423834B (en) | 2016-09-12 | 2016-09-12 | A kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen |
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| CN201610817262.6A CN106423834B (en) | 2016-09-12 | 2016-09-12 | A kind of indeterminate modularization girder adjustable amplitude low-frequency vibration flip flop screen |
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| CN106423834B true CN106423834B (en) | 2018-08-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107876378B (en) * | 2017-10-30 | 2020-07-24 | 中国矿业大学 | Equal-thickness flip-flow screen with small occupied space |
| CN108816741A (en) * | 2018-08-03 | 2018-11-16 | 鞍山重型矿山机器股份有限公司 | Exciting force is oriented parallel to the flip flop screen of compass screen surface |
| CN110064583B (en) * | 2019-04-26 | 2020-08-04 | 中国矿业大学(北京) | Nonlinear vibration relaxation sieve |
| CN112474289A (en) * | 2020-11-23 | 2021-03-12 | 临沂大学 | Linear vibrating screen with adjustable amplitude and vibration direction angle |
| CN113182176A (en) * | 2021-06-16 | 2021-07-30 | 临沂大学 | Double-shaft forced synchronous circular vibrating screen |
| CN113385412A (en) * | 2021-07-21 | 2021-09-14 | 山东理工大学 | Circular vibration relaxation sieve with online adjustable exciting force and exciting force adjusting method |
| CN114273219B (en) * | 2021-12-21 | 2023-02-24 | 马鞍山市天工科技股份有限公司 | Nonlinear vibration relaxation sieve amplitude online stepless adjusting device and using method |
| CN114323523B (en) * | 2021-12-30 | 2023-02-24 | 天津大学 | Vibrating screen crossbeam fatigue testing machine |
| CN114570637A (en) * | 2022-03-02 | 2022-06-03 | 上海交通大学 | Vibrating screen box and vibrating screen for screening ores |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3834534A (en) * | 1971-12-20 | 1974-09-10 | Kennecott Copper Corp | Variable mode vibratory screen |
| CN1186132C (en) * | 2002-03-25 | 2005-01-26 | 中国矿业大学 | Large-scale vibrating screen of redundancy meshwork beams excitation |
| CN2832329Y (en) * | 2005-08-26 | 2006-11-01 | 李卫东 | Amplitude, frequency adjustable shaker screen |
| CN100438994C (en) * | 2007-01-15 | 2008-12-03 | 中国矿业大学 | Double-group static-indeterminant mesh-beam exciting-vibration Plate type combination bearing beam oversize vibration screen |
| CN101497073A (en) * | 2009-02-19 | 2009-08-05 | 吴兆忠 | Bridge type vibrating screen device with adjustable amplitude |
| CN103240222B (en) * | 2013-04-28 | 2015-04-08 | 中国矿业大学 | Large synchronous hyperstatic net-beam vibrating screen |
| CN104438053A (en) * | 2014-11-26 | 2015-03-25 | 毛国武 | Energy saver of large amplitude-adjustable vibrating screen |
| CN104550011B (en) * | 2015-01-09 | 2017-02-22 | 天地（唐山）矿业科技有限公司 | Large vibration screen for grading coal carbon |
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