CN106423834A - Statically indeterminate modular main beam amplitude adjustable low-frequency vibration tension and relaxation screen - Google Patents
Statically indeterminate modular main beam amplitude adjustable low-frequency vibration tension and relaxation screen Download PDFInfo
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- CN106423834A CN106423834A CN201610817262.6A CN201610817262A CN106423834A CN 106423834 A CN106423834 A CN 106423834A CN 201610817262 A CN201610817262 A CN 201610817262A CN 106423834 A CN106423834 A CN 106423834A
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- screen
- girder
- floating
- indeterminate
- plate
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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
The invention discloses a statically indeterminate modular main beam amplitude adjustable low-frequency vibration tension and relaxation screen. The screen comprises a screen body, a spring support base, a vibration reducing spring, a motor, a bracket, and a statically indeterminate excitation main beam consisting of a pipe beam and a fixed plate; a floating screen frame is arranged on the screen body; elastic screen surfaces are arranged on the screen body and the flowing screen frame; the floating screen frame is hung and mounted at the lower part of the screen body through a rubber hinge; the flowing screen frame can enable the polyurethane elastic screen surfaces to swing up and down under the effect of materials to accelerate the operation speed of the materials to prevent the load concentration; the polyurethane elastic screen surfaces are connected by multiple rectangular screen plates; and two ends of each screen plate are respectively mounted on a fixed cross beam of the screen body and a floating cross beam of the floating screen frame. The floating screen frame and the screen body are in hanging connection by the rubber hinge; and an amplitude adjusting spring is mounted between the two. Vibration exciters are arranged in a side plate and the statically indeterminate main beam. The screen is compact in structure, high in reliability, convenient to adjust the motion mode and the working amplitude and suitable for dry deep screening of wet fine-particle coals in coal preparation plants.
Description
Technical field
The present invention relates to a kind of vibration type flip flop screen, especially a kind of indeterminate modularity girder being applied to coal screening
Adjustable amplitude low-frequency vibration flip flop screen, belongs to coal preparation machine technical field.
Background technology
Screening is the important step of Coal dressing.Vibrosieve obtains in coal preparation plant as coal screening equipment extensively should
With.With the application of raw coal fully mechanized mining automatic technology, raw coal degree of crushing improves, and hydraulic coal mining, down-hole water spray are dust-proof etc. in addition
The application of measure, leads to fine fraction component and moisture in raw coal to increase, and it is agglomerating to often lead to Bed for Fine Coal bonding, the stifled sieve of paste
Face.To this kind of moist fine particulate coal, common Vibration Screen component efficiency low it is difficult to carry out effective deep dry screening.
Vibration type flip flop screen is a kind of new screening plant processing wetted coal fines, compares common vibrosieve, and vibration relaxes
Open sieve to be made up 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 kinetics subresonance principle, between floating screen frame and sieve nest, there is Relative Vibration, form additional movement.Its compass screen surface is adopted
Made with polyurethane elastomeric materials, compass screen surface two ends are separately fixed on sieve nest and floating screen frame, in the effect of both Relative Vibrations
Under, compass screen surface slack-taut, form periodic tension and relaxation motion, be derived from higher throwing acceleration and larger sieve aperture
Deflection, prevents solid accumulation, adhesion.
At present in vibration type flip flop screen design field, circular vibration flip flop screen and straight generally can be divided into by forms of motion difference
Linearly coupled flip flop screen.The patent documentation of Application No. 2014108478863,2013200375643 discloses a kind of monolayer tension and relaxation
Sieve-type screening plant, the patent documentation of Application No. 2014108550974,2014208681285 discloses a kind of multilamellar tension and relaxation
Sieve-type screening plant, structure disclosed in these patent documentations is all similar to circular shale shaker, and its common feature is using single bias
Block exciter drives, and vibrator is fixed through side plate, and exciting force acts directly on side plate；Sieve nest makees class circular vibration, and float sieve
Frame is connected using shear-type rubber spring with sieve nest, and sieve nest relatively makees reciprocating translatory.From the point of view of sieving technology angle, the place of circular motion
Significantly, structure simply, but conveys on compass screen surface reason amount to material, layered effect is poor, needs certain inclination angle during installation, takies empty
Between excessive.Rubber shear spring rubber after the effect bearing reciprocating shear for a long time easily tears.Meanwhile, the work of shearing force
With making rubber generate heat, thus lead to rubber to harden becoming fragile, losing efficacy, reducing the reliability of vibration flip flop screen.Additionally, this kind of shake
Dynamic flip flop screen will realize low frequency（《600r/min）During large amplitude, need to reduce the rigidity of rubber shear spring, and this can limit
Floating screen frame bearing capacity, is therefore subject to the rigidity of rubber shear spring and the mutual restriction of floating screen frame bearing capacity, often work
Make in upper frequency, and traditional crank-linkage type flip flop screen, according to field experience, operating frequency is typically in below 600r/min
Preferable screening effect can be obtained.
The patent documentation of Application No. 2014107970494 discloses a kind of quick removal bulk materials vibration type tension and relaxation
Sieve, floating screen frame and sieve nest adopt rubber hinge to hang and install, and service life and maintainable relatively rubber shear spring significantly carry
Height, but amplitude adjusts inconvenience it is impossible to be well adapted for working conditions change.
The patent documentation of Application No. 2014203021895 discloses a kind of flip flop screen using box vibrator, its knot
Structure makees class linear motion similar to straight-line oscillation banana screen, sieve nest under vibrator effect, has preferable conveying to material and makees
With, 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, for bearing the exciting force of vibrator generation, girder size and weight are larger, there is larger structure deadweight, energy consumption is higher,
It is unfavorable for vibrating the maximization of flip flop screen.
The patent documentation of application number 2013107281514 proposes a kind of banana tension and relaxation screen without girder, equally adopts box
Vibrator, because vibrator is directly installed on sieve nest side plate top, alleviates architecture quality.But due to being concentrfated load, for ensureing
The stability that flip flop screen runs, the therefore concordance to both sides exciting force and side plate machining accuracy, intensity requirement is higher.
The patent documentation of application number 200710019307.6 proposes a kind of double-group static-indeterminant mesh-beam exciting-vibration plate board assembling
The super-huge vibrosieve of spandrel girder, by the use of net beam body redundant structure as girder, preferably overcomes the defect of traditional girder, fits
Close and maximize, but its main beam structure form is fixed, and can only realize single linear motion.
The patent documentation of Application No. 2015205282540 discloses a kind of flip flop screen stagewise walking beam amplitude and adjusts dress
Put, by being adjusted, thus changing the range of activity of floating screen frame, being adapted to difference to the pretightning force of shear-type rubber spring
Working condition requirement, is limited by rubber spring intensity, and amplitude range of accommodation is little.The patent documentation of Application No. 2015203736591
Propose segmentation amplitude adjustable Banana Type vibration flip flop screen, its floating screen frame is divided into multistage, according to actual needs, by dismounting
Or change each section of shear-type rubber spring, can be with the compass screen surface amplitude of each section of independent regulation, but by changing block rubber number destination party
Method carrys out adjusting amplitude it is impossible to realize the step-less adjustment of amplitude, if dismounting number is excessive, often affects the carrying energy of floating screen frame
Power.
Existing flip flop screen is primarily present problem and has in sum：1）Thus result in spring using shear-type rubber spring easily to tear
Split, send out or enabling capabilities inadequate；Shear-type rubber spring rigidity, structure and enabling capabilities limit low frequency operation ability 2）Excitation beam of vibration
It is difficult to the manufacturing issue overcoming insufficient rigidity problem and the complexity brought using box vibrator in large span size；3）Floating
Dynamic screen frame amplitude adjusts inconvenience it is impossible to realize step-less adjustment, and often changes floating screen frame bearing capacity when reconciling.4）Vibration
Compass screen surface service life is short.
Content of the invention
Technical problem：The purpose of the present invention is the weak point overcoming in prior art, provides a kind of structure simple, reliable
Property high, power consumption is low, be easy to maximize, the indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen of good operation stability.
Technical scheme：The indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen of the present invention, including sieve nest, spring
Support base, damping spring, motor, support, the indeterminate exciting girder being made up of Guan Liang and fixed plate, described sieve nest passes through bullet
Spring support base is arranged on damping spring, and described sieve nest is provided with floating screen frame, and sieve nest and floating screen frame are provided with elasticity sieve
Face, floating screen frame hangs the bottom being installed on sieve nest by rubber hinge, and floating screen frame can make polyurethane in the presence of material
Elastic screen surface swings up and down, and accelerates the material speed of service, it is to avoid load concentration；
Described sieve nest includes left plate, right plate, backboard, many fixed cross beams connecting left and right sides plate and buttress brace,
Many fixed cross beams are located at the bottom of sieve nest, and buttress brace is located at the top of sieve nest, and the middle part between described left side plate is provided with use
Indeterminate exciting girder in single group or double groups of eccentric block vibration exciters；
Described eccentric block vibration exciter includes power transmission shaft and the multiple eccentric blocks being located on power transmission shaft, and multiple eccentric block dispersions are installed
In fixed plate within left side plate and indeterminate exciting girder, power transmission shaft one end of eccentric block vibration exciter pass through shaft coupling with
Rack-mount motor is connected；
Described floating screen frame includes curb girder, floating crossbeam and spring fastening, and flange is passed through with curb girder even in the two ends of floating crossbeam
Connect, constitute frame structure；Floating crossbeam alternates arrangement with the fixed cross beam of sieve nest bottom；
Described elastic screen surface includes polylith rectangle sieve plate and draw-in groove band, and the both sides of described rectangle sieve plate are provided with buckle side, described
Draw-in groove be provided with, with both sides, the draw-in groove being interlocked with rectangular mesh screen board button side, middle part is interval with multiple fixing holes, by draw-in groove
Rectangle sieve plate is fastened and is connected as a single entity by band, and each draw-in groove band is separately mounted to fixed cross beam through backing plate, press strip, bolt and Rust-inhibiting nut
On floating crossbeam.
The curb girder rear and front end of described floating screen frame is provided with amplitude limit spring.
Described rubber hinge connecting length can be by individually or simultaneously changing each rubber hinge connecting length, adjusting amplitude
Limit spring rigidity or the working amplitude changing floating screen frame, adapt to different operating modes and are adjusted.
Described elastic screen surface is elastic polyurethane compass screen surface.
The height of described floating crossbeam and fixed cross beam at grade, or not in same level；
Described indeterminate exciting girder is for installing the circular configuration of single group eccentric block vibration exciter indeterminate exciting girder, or
For installing the regular polygon structure indeterminate exciting girder of double group eccentric block vibration exciters.
Described circular configuration indeterminate exciting girder is made up of polylith circle fixed plate and Duo Gen A pipe beam, and polylith is circular
The middle part of fixed plate has concentric circle holes, and many A pipe beams circularize to be uniformly distributed and are fixed in circular fixed plate, structure
Circular net girder construction.
Described regular polygon structure indeterminate exciting girder includes polylith regular polygon fixed plate and Duo Gen B pipe beam structure
Become, polylith regular polygon fixed plate has two concentric circle holes, many B pipe beams become that regular polygon is symmetrical to be fixed on
In regular polygon fixed plate, constitute regular polygon net girder construction.
Beneficial effect：The present invention passes through to change the rigidity of metal spring and the company of regulation rubber hinge before and after floating screen frame
Spreading degree, thus it is possible to vary the kinetic parameter of vibration flip flop screen, thus step-less adjustment floating screen frame is relative to the working amplitude of sieve nest.
Because this regulation does not change the annexation of floating screen frame and sieve nest, thus without the bearing capacity reducing floating screen frame.Adjust
The connecting length of section rubber hinge can make the floating crossbeam of floating screen frame and the fixed cross beam of sieve nest be 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 adapting to different material or working condition requirement.The present invention is in sieve nest
Left side plate top adopts indeterminate exciting girder to connect, and vibrator dispersion is arranged on left side plate and the inside of exciting girder is solid
In fixed board, indeterminate exciting girder simultaneously works as the effect connecting left side plate and providing exciting force, reduces structure deadweight.?
Under equal exciting force, by the way of dispersion installation adopted by vibrator, concentrfated load can be avoided, make full use of the rigidity of structure, prevent
Only stress raisers.Single vibrator volume, compact conformation can be reduced simultaneously, adapt to vibrosieve maximization and require.Super quiet
Fixed structure exciting girder is adapted to wider compass screen surface width, is conducive to vibrating the maximization of flip flop screen.Can be according to technological requirement
Difference, retains Guan Liang, only passes through to change the fixed plate of different structure, is assembled into the exciting girder of multi-form, realizes circular vibration
Exciting or straight-line oscillation exciting, motility is strong, cost-effective.
Using rubber hinge, floating screen frame is suspended on sieve nest bottom, rubber hinge gives the reciprocally swinging of floating screen frame,
Large carrying capacity, it is to avoid floating screen frame is embedded in the rubber bringing during sieve nest using shear-type rubber spring by General Oscillation flip flop screen
Glue fatigue tear, firmly crisp phenomenon of generating heat.The amplitude limit spring installed before and after floating screen frame can effectively suppress floating screen frame
Motion on other directions, prevents the rubber element in rubber hinge from producing large deformation, enhances the running stability of flip flop screen
With the elastomeric element life-span.
Can be by shaking before and after adjusting the length of rubber hinge coupling part and changing floating screen frame in actual production
The rigidity of width limit spring, thus the amplitude of flexible floating screen frame, adapts to different process demand.Floating screen frame can be realized
The step-less adjustment of working amplitude, does not change its bearing capacity simultaneously.
Additionally, the length changing rubber hinge coupling part can make the floating crossbeam of floating screen frame and the fixing horizontal of sieve nest
Beam is on different level, and then changes the curved shape of Polyurethane sieve, is conducive to material in Polyurethane sieve rolling, touches
Hit, disintegrate, improve screening efficiency.Described polyurethane sieve plate is non-to wait thick structure, including bonding pad, transition region, working area, no
Adopt different thickness and shape of cross section with region, can eliminate between working region and the join domain of flip flop screen compass screen surface
Stress concentration phenomenon, improve compass screen surface intensity, extend the life-span；Two ends are arranged on fixed cross beam and floating using fastening type structure
On crossbeam, structure is simple, and reliability is high, and easy accessibility is it is easy to maintenance and repair.
Brief description
Fig. 1 is embodiments of the invention one structural representation；
Fig. 2 is embodiments of the invention two structural representation；
Fig. 3 is the primary structure axle geodesic structure schematic diagram of Fig. 1；
Fig. 4 is the primary structure axle geodesic structure schematic diagram of Fig. 2；
Fig. 5 is that the primary structure side-looking of Fig. 1 shows that structure is intended to；
Fig. 6 is that the primary structure side-looking of Fig. 2 shows that structure is intended to；
Fig. 7 is that the floating screen frame axle 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 compass screen surface and the 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 that the floating crossbeam of the present invention is in schematic diagram during same level with fixed cross beam；
Figure 16 is that the floating crossbeam of the present invention is in schematic diagram during different level with fixed cross beam.
Specific embodiment
The invention will be further described for embodiment in below in conjunction with the accompanying drawings：
Embodiment 1 as shown in figure 1, the indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen of the present invention, mainly by sieving
Body 1, elastic screen surface 2, floating screen frame 3, rubber hinge 4, amplitude limit spring 5, spring support seat 6, damping spring 7, shaft coupling
8th, motor 9, support 10 and indeterminate exciting girder composition.Described sieve nest 1 is arranged on damping spring 7 by spring support seat 6
On, described sieve nest 1 is provided with floating screen frame 3, and sieve nest 1 and floating screen frame 3 are provided with elastic screen surface 2, and floating screen frame 3 passes through rubber
Glue hinge 4 hangs the bottom being installed on sieve nest 1, and floating screen frame 3 can make the bottom on elastic polyurethane compass screen surface 2 in the presence of material
Dynamic, accelerate the material speed of service, it is to avoid load concentration；The curb girder 3-1 rear and front end of described floating screen frame 3 is provided with amplitude limit
Position spring 5, can change different-stiffness spring as needed；Described rubber hinge 4 connecting length can be by individually or simultaneously changing
Become each rubber hinge 4 connecting length, adjusting amplitude adjusts spring 5 rigidity, change the working amplitude of floating screen frame, adapt to different works
Condition is adjusted.Described indeterminate exciting girder is super quiet for installing the regular polygon structure of double group eccentric block vibration exciters 11
Determine exciting girder.The mounting seat of rubber hinge is respectively disposed with sieve nest 1 left side plate and floating screen frame curb girder correspondence position
12nd, 13, floating screen frame 3 is hung on sieve nest 1 by rubber hinge 4 using mounting seat 13.The length of rubber hinge 4 coupling part
Adjustable.
Shown in Fig. 3, described sieve nest 1 includes left plate 1-1, right plate 1-5, backboard 1-4, connects left and right sides plate
Many fixed cross beam 1-3 and buttress brace 1-6, many fixed cross beam 1-3 are located at the bottom of sieve nest 1, and buttress brace 1-6 is located at sieve nest 1
Top, the middle part between described left side plate is provided with the indeterminate exciting girder for double groups of eccentric block vibration exciters 11, double groups
Eccentric block vibration exciter reversely rotates and can achieve straight-line oscillation excitation.
Shown in Fig. 3 Fig. 5, described eccentric block vibration exciter 11 includes two power transmission shafts and is located at multiple on two power transmission shafts
Eccentric block, multiple eccentric blocks be divided into the side plate eccentric block 11-1 that two classes include being arranged on left plate 1-1 and right plate 1-5 and point
Dissipate the inside eccentric block 11-2 in the fixed plate being arranged within indeterminate exciting girder, the power transmission shaft one of eccentric block vibration exciter 11
End is connected with the motor 9 installed over the mount 10 by shaft coupling 8；
Shown in Fig. 7, described floating screen frame 3 includes curb girder 3-1, floating crossbeam 3-2 and spring fastening 3-3, floating crossbeam 3-2's
Two ends are connected with curb girder 3-1 by flange, constitute frame structure；Sieve nest 1 left and right side plate 1-1,1-5 bottom correspondence position arrangement
Jagged, the floating crossbeam 3-2 of floating screen frame passes through breach and alternates arrangement positioned at the fixed cross beam 1-3 of sieve nest 1 bottom.
According to the change of rubber hinge 4 connecting length, floating crossbeam 3-2 and fixed cross beam 1-3 may be located at varying level in height
On face.Floating screen frame curb girder rear and front end is provided with spring fastening 3-3, and spring fastening has been provided with the spring of adjusting amplitude effect
5, the spring other end is fixed on the spring fastening 1-7 of sieve nest, different according to floating screen frame amplitude requirement, spring 5 detachable or
Change 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 be arranged on
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, for ease of
Pan feeding and discharge, make to be fixed cross beam positioned at the feeding end of sieve nest 1 and the crossbeam of discharge end.
Shown in Fig. 8, described regular polygon structure indeterminate exciting girder includes polylith regular polygon fixed plate 1-2a-2
Constitute with many B pipe beam 1-2 a-1, polylith regular polygon fixed plate 1-2a-2 is 2-6 block, is set according to the width requirement of sieve nest 1
Fixed, the fixed plate of in figure example is 4 pieces.Two concentric circulars running through are had on polylith regular polygon fixed plate 1-2a-2
Hole, many B pipe beam 1-2 a-1 become that regular polygon is symmetrical to be fixed in polylith regular polygon fixed plate 1-2a-2, just constitute
Polygon latticed girder construction.All Guan Liang arrange around eccentric block vibration exciter 11, form clad structure, simultaneously work as connecting left and right sides
Plate and the effect of transmission exciting force.
Shown in Figure 10 to Figure 14, described Polyurethane sieve 2 is made up of the splicing of multiple polyurethane rectangle sieve plates, every piece of sieve plate
Two ends are separately mounted on the floating crossbeam 3-2 on the fixed cross beam 1-3 and floating screen frame of sieve nest 1 bottom.Elastic screen surface 2 includes
The both sides of polylith rectangle sieve plate 2-1 and draw-in groove band 2-2, rectangle sieve plate 2-1 are provided with buckle side, and draw-in groove band 2-2 both sides are provided with and square
The draw-in groove that shape sieve plate 2-1 buckle side is interlocked, middle part is interval with multiple fixing holes, by draw-in groove band 2-2 by rectangle sieve plate 2-1
Fastening is connected as a single entity, and each draw-in groove 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.Described elastic screen surface 2 is elastic polyurethane compass screen surface, and polyurethane rectangle sieve plate is an entirety
Symmetrical structure, including bonding pad, transition region, working area, zones of different adopts varying cross-section shape, and bonding pad is located at sieve plate two
End, is responsible for compass screen surface is connected with crossbeam, and working area is the part having sieve aperture on sieve plate, realizes screening function, bonding pad thickness
More than working area thickness, transition region is adopted to connect between the two.Sieve plate two ends by buckle structure be arranged on fixed cross beam 1-3 and
On floating crossbeam 3-2.
Shown in Figure 15, Figure 16, the height and position of described floating crossbeam 3-2 and fixed cross beam 1-3 can be in same plane
Upper it is also possible to not at grade.
Shown in embodiment two, Fig. 2, it is identical with embodiment 1, and something in common is slightly.Difference：Described is indeterminate sharp
The girder that shakes is that single group eccentric block vibration exciter can for installing the circular configuration of single group eccentric block vibration exciter 11 indeterminate exciting girder
Realize circular vibration excitation.
Shown in Fig. 4 Fig. 6, described eccentric block vibration exciter 11 includes a power transmission shaft and is located at multiple inclined on this power transmission shaft
Heart block, multiple eccentric blocks include the side plate eccentric block 11-1 being arranged on left plate 1-1 and right plate 1-5 and dispersion be arranged on super
Inside eccentric block 11-2 in fixed plate within static determinacy exciting girder, shaft coupling is passed through in power transmission shaft one end of eccentric block vibration exciter 11
Device 8 is connected with the motor 9 installed over the mount 10；Shown in Fig. 9, described circular configuration indeterminate exciting girder is circular by polylith
Fixed plate 1-2b-2 and Duo Gen A pipe beam 1-2b-1 are constituted, and polylith circle fixed plate 1-2b-2 is 2-6 block, according to the width of casing 1
Requirement is provided with, and in figure example is, 4 pieces.The middle part of polylith circle fixed plate 1-2b-2 has concentric circle holes, many A
Pipe beam 1-2b-1 circularizes to be uniformly distributed and is fixed in circular fixed plate 1-2b-2, constitutes circular net girder construction.All Guan Liang enclose
Arrange around eccentric block vibration exciter 11, form clad structure.
Operation principle：As a example when installing double group eccentric block vibration exciter, motor 9 is driven by yielding coupling and is located at respectively
Eccentric block vibration exciter rotation on sieve nest 1 side plate and the internal fixed plate of indeterminate exciting girder, produces 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 pass through rubber hinge and
Amplitude adjusts spring and connects, and 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 and main sieve nest make periodic relative motion, so that the floating crossbeam being arranged on floating screen frame and sieve
The fixed cross beam of body 1 periodically " close " " away from " " close ".Elastic sieve plate 2 two ends due to polyurethane are separately fixed at
On fixed cross beam 1-3 and floating crossbeam 3-2, the therefore entirely lax tensioning of compass screen surface each property regional cycle under the drive of crossbeam
Lax, thus realizing tension and relaxation motion, producing higher throwing acceleration and larger sieve aperture deflection, preventing fine moist material
Pile up, adhere to.
Claims (8)
1. a kind of indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen, including sieve nest (1), spring support seat (6), subtracts
Shake spring (7), motor（9）, support（10）, the indeterminate exciting girder that is made up of Guan Liang and fixed plate, described sieve nest（1）Logical
Cross spring support seat (6) be arranged on damping spring (7) upper it is characterised in that：Described sieve nest (1) is provided with floating screen frame (3),
Sieve nest (1) and floating screen frame (3) are provided with elastic screen surface (2), and floating screen frame (3) passes through rubber hinge（4）Suspension is installed on sieve
Body（1）Bottom, floating screen frame (3) can make elastic polyurethane compass screen surface (2) swing up and down in the presence of material, accelerate material fortune
Scanning frequency degree, it is to avoid load concentration；
Described sieve nest（1）Including left plate (1-1), right plate (1-5), backboard (1-4), connect many of left and right sides plate
Fixed cross beam (1-3) and buttress brace (1-6), many fixed cross beams (1-3) are located at sieve nest（1）Bottom, buttress brace (1-6) is located at
Sieve nest（1）Top, the middle part between described left side plate is provided with for single group or double groups of eccentric block vibration exciters（11）Super quiet
Determine exciting girder；
Described eccentric block vibration exciter（11）Including power transmission shaft and the multiple eccentric blocks being located on power transmission shaft, multiple eccentric blocks dispersions
It is arranged in the fixed plate within left side plate and indeterminate exciting girder, eccentric block vibration exciter（11）Power transmission shaft one end pass through
Shaft coupling（8）Be arranged on support（10）On motor（9）It is connected；
Described floating screen frame（3）Including curb girder（3-1）, floating crossbeam（3-2）And spring fastening（3-3）, floating crossbeam（3-2）
Two ends pass through flange and curb girder（3-1）Connect, constitute frame structure；Floating crossbeam（3-2）With sieve nest（1）The fixing horizontal stroke of bottom
Beam（1-3）Alternate arrangement；
Described elastic screen surface（2）Including polylith rectangle sieve plate（2-1）With draw-in groove band（2-2）, described rectangle sieve plate（2-1）Two
Side is provided with buckle side, described draw-in groove band（2-2）Both sides are provided with and rectangle sieve plate（2-1）The draw-in groove that buckle side is interlocked, middle part
It is interval with multiple fixing holes, by draw-in groove band（2-2）By rectangle sieve plate（2-1）Fastening is connected as a single entity, each draw-in groove band（2-2）Warp
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
(3-2) on.
2. a kind of indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, its feature exists
In：Described floating screen frame（3）Curb girder（3-1）Rear and front end is provided with amplitude and adjusts limit spring（5）.
3. a kind of indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, its feature exists
In：Described rubber hinge（4）Connecting length can be by individually or simultaneously changing each rubber hinge（4）Connecting length, regulation are shaken
Width adjusts spring（5）Rigidity or the working amplitude changing floating screen frame, adapt to different operating modes and are adjusted.
4. a kind of indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, its feature exists
In：Described elastic screen surface（2）For elastic polyurethane compass screen surface.
5. a kind of indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, its feature exists
In：Described floating crossbeam（3-2）And fixed cross beam（1-3）Height at grade, or not in same level.
6. a kind of indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen according to claim 1, its feature exists
In：Described indeterminate exciting girder is for installing single group eccentric block vibration exciter（11）Circular configuration indeterminate exciting master
Beam, or be used for double group eccentric block vibration exciters are installed（11）Regular polygon structure indeterminate exciting girder.
7. a kind of indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen according to claim 5, its feature exists
In：Described circular configuration indeterminate exciting girder is by polylith circle fixed plate（1-2b-2）With many A pipe beams（1-2b-1）Structure
Become, polylith circle fixed plate（1-2b-2）Middle part have concentric circle holes, many A pipe beams（1-2b-1）Circularize all
Even distribution is fixed on circular fixed plate（1-2b-2）On, constitute circular net girder construction.
8. a kind of indeterminate modularity girder adjustable amplitude low-frequency vibration flip flop screen according to claim 5, its feature exists
In：Described regular polygon structure indeterminate exciting girder includes polylith regular polygon fixed plate（1-2a-2）With many B pipe beams
（1-2 a-1）Constitute, polylith regular polygon fixed plate（1-2a-2）On have two concentric circle holes, many B pipe beams（1-2
a-1）Become that regular polygon is symmetrical is fixed on regular polygon fixed plate（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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| CN107876378A (en) * | 2017-10-30 | 2018-04-06 | 中国矿业大学 | A kind of uniform thickness flip flop screen to occupy little 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 |
| CN110064583A (en) * | 2019-04-26 | 2019-07-30 | 中国矿业大学(北京) | A kind of Non-Linear Vibration flip flop screen |
| 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 |
| CN114273219A (en) * | 2021-12-21 | 2022-04-05 | 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 |
| CN114323523A (en) * | 2021-12-30 | 2022-04-12 | 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 |
| CN116060288A (en) * | 2022-12-16 | 2023-05-05 | 内蒙古双欣矿业有限公司 | Coal slime reduction device for coal preparation plant |
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| CN1446642A (en) * | 2002-03-25 | 2003-10-08 | 中国矿业大学 | Large-scale shale shaker of hyperstatic net roof beam excitation |
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| 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 |
| CN114273219A (en) * | 2021-12-21 | 2022-04-05 | 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 |
| 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 |
| CN114323523A (en) * | 2021-12-30 | 2022-04-12 | 天津大学 | Vibrating screen crossbeam fatigue testing machine |
| 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 |
| CN116060288A (en) * | 2022-12-16 | 2023-05-05 | 内蒙古双欣矿业有限公司 | Coal slime reduction device for coal preparation plant |
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