CN206652700U - Vibrate flip-flow screening machine - Google Patents
Vibrate flip-flow screening machine Download PDFInfo
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- CN206652700U CN206652700U CN201720238047.0U CN201720238047U CN206652700U CN 206652700 U CN206652700 U CN 206652700U CN 201720238047 U CN201720238047 U CN 201720238047U CN 206652700 U CN206652700 U CN 206652700U
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Abstract
Coal washing cleaning unit is the utility model is related to, specially vibrates flip-flow screening machine, solves the problems, such as that existing vibratory sieve easily occurs that sieve aperture paste is viscous, blocks, scheme when screening high high viscosity, table water, fine-grained material：Including two blocks of vertical main screen frame side plates, main screen frame side sheet room is fixed with fixed beam, is further fixed on circular vibration vibrator；Long waist-shaped hole is provided between fixed beam, walking beam is installed with long waist-shaped hole, floating screen frame side plate is fixed between the termination of walking beam, floating screen frame side plate is connected by shear spring with main screen frame side plate, and Flexible sieve is fixed between walking beam and fixed beam.Advantage：1st, relaxation motion is done in elastic polyurethane screen cloth face, can prevent the viscous glutinous plug-hole of glutinous wet stock；2nd, flip-flow screening machine can effectively be sieved to power raw coal, directly obtain the smalls product of golf calorific value, simplify steam coal separation technique, reduce processing cost；3rd, screen(ing) machine bears load and substantially reduced, service life length.
Description
Technical field
Coal washing cleaning unit is the utility model is related to, specially vibrates flip-flow screening machine.
Background technology
In field of coal mining, vibratory sieve is commonly used, existing vibratory sieve includes two blocks of screen frame side plates being vertically supported,
It is parallel between the screen frame side plate to be fixed with more fixed beams, rigid sieve plate, the fixed beam are fixed with the fixed beam
With the compass screen surface of sieve plate formation diagonally downward；Vibrator driven is additionally provided with the screen frame side plate.Existing vibratory sieve according to
By vibrator driving screen frame side plate motion, the coal in the fixed beam fixed with screen frame side plate and rigid sieve plate vibrating screen surface is transported
It is dynamic.In the washing process of coal, we are frequently encountered the material of the difficult screening of comparison such as：High viscosity, table water are high, fine-grained
Material.The particularity of these materials often triggers phenomena such as viscous sieve aperture paste of existing vibratory sieve, sieve pore blockade, causes screening efficiency
Reduce, moisture increase, granule measurement increase.Thus material can not be effectively classified.Therefore, designing one kind can be high
Effect screening high viscosity, table water are high, the vibratory sieve of fine granularity material is extremely necessary.
The content of the invention
The utility model solves existing vibratory sieve and sieve aperture easily occurs when screening high high viscosity, table water, fine-grained material
The problem of paste is viscous, blocking, there is provided one kind vibration flip-flow screening machine.
The utility model is achieved through the following technical solutions：Vibrate flip-flow screening machine, including two pieces of masters being vertically supported
Screen frame side plate, it is parallel between the main screen frame side plate to be fixed with more fixed beams, circle is further fixed on the main screen frame side plate and is shaken
Dynamic vibrator；Long waist-shaped hole is provided between the fixed beam at equal intervals, walking beam, the walking beam are installed with the long waist-shaped hole
Both ends main screen frame side plate both ends of the surface are passed by long waist-shaped hole, be fixed between the same side termination of the walking beam floating sieve
Frame side plate, the floating screen frame side plate are connected by shear spring with main screen frame side plate outer surface, the walking beam and fixed beam
Between be fixed with elastic polyurethane screen cloth.Long waist-shaped hole is provided with main screen frame side plate, walking beam both ends are passed by long waist-shaped hole
Main screen frame side plate, and be connected with floating screen frame side plate with main screen frame side plate by shear spring.When circular vibration vibrator excites
When main screen frame side plate and fixed beam vibration, vibration is passed to floating screen frame side plate and walking beam by shear spring.Fixed beam with
With the two distance change between walking beam, drawing Flexible sieve does relaxation motion, so as to throw the material connect on Flexible sieve.
Fixed elastic polyurethane screen cloth is tilted down setting between the fixed beam and walking beam.The main screen frame side
Plate is supported by shock-absorbing spring and set.
Vibrate the Vibrations of flip flop screen
The displacement and exciting force for vibrating flip flop screen can be in the x-direction elastic polyurethane screen cloth with y Directional Decompositions, x directions
Parallel direction, y directions are the vertical direction of elastic polyurethane screen cloth.Vibrate flip flop screen inertial excitation power phase as shown in Fig. 2
Wherein,It is the exciting force for vibrating flip-flow screening machine, its component in x directions isCos ω t, the component in y directions aresin(ωt
+π)。
First, the analysis of x directions vibration characteristics
xThe mechanical model in direction is established
The mechanical model of vibration flip flop screen horizontal direction is established with concentrated quality method, as shown in Figure 3.This system belongs to two certainly
By spending the Forced Oscillation in Nonlinear System system with damping.Contain 2 plastids in systemm 1 Withm 2, main screen frame and floating are represented respectively
Screen frame.Exciting force acts onm 1On, pass through shear springk x2With elastic polyurethane screen clothk x3Withk x4Drivem 2Vibration.
Just exist when elastic polyurethane screen cloth produces relative motion only between fixed beam and walking beam, screen cloth is tightened up
Elastic force, therefore screen cloth functions as gap spring.Screen cloth is according to the difference that direction of pull is produced to floating beam, Ke Yifen
For two groups：The pulling force of one group of generation forward；The pulling force of another group of generation backward.The quantity of two groups of screen clothes is often equal, or difference
One quantity, it can thus be assumed thatk x3It is equal tok x4,c x3It is equal toc x4.The gap of gap springeBetween 0 ~ δ mm, δ sieves to float
The maximum relative displacement of frame and main screen frame.According to the difference of screen cloth hardness,kx 3Account fork x20% ~ 40%.Therefore, screen cloth etc.
Too much influence will not be caused in general spring to result of calculation by imitating, after equivalentk x3′≈ξk x3, 0≤ξ≤1, wheneIt is smaller
When, ξ takes large values, wheneWhen larger, ξ gets the small value.
In view of latex spring deformation in the range of linearity, and very little is damped, therefore damped negligible.So
xThe mechanical model in direction is reduced to the mechanical model shown in Fig. 4, whereink x3' for the coefficient of elasticity in the flip-flow screening machine face after equivalent.
The vibration of x directions solves
Undamped forced vibration kinetic model according to Fig. 4, establish the mechanical equation group of system
（1）
In formula：Exist for main screen framexAcceleration on direction, m/s2；Floating screen frame existsxAcceleration on direction,
m/s2；For angular speed, rad/s；tFor time, s.
For convenience of calculation, if
And bring formula into（1）
(2)
This is a second-order linearity constant coefficient non-homogeneous differential equation, and its general solution is made up of two parts：One corresponds to together
The solution of equation of n th order n group, i.e. free vibration, when system, which exists, to be damped, this free vibration through just gradually declining after a period of time
Subtract；Two correspond to a particular solution of above-mentioned nonhomogeneous equation group, and it is the forced vibration as caused by exciting force, i.e., system is steady
State is vibrated.Steady-state vibration is only studied herein, therefore formula (2) differential equation group has the particular solution of simple harmonic oscillation, i.e.,
(3)
In formula：A 1For the amplitude of main screen frame, m；A 2For the amplitude of floating screen frame, m；A 1、A 2In equation group be treat it is permanent
Number.
Ask second order to lead formula (3), obtain
(4)
Formula (3), (4) are substituted into formula (2), obtained
(5)
Solve
(6)
Substitute intom 1、m 2、k x1、k x2、 DengNumerical value, and using angular velocity omega as abscissa, amplitudeAFor ordinate, drawx
The amplitude-versus-frequency curve in direction, as shown in Figure 5.
In Figure 5, ω1、ω22 resonant frequencies of system are represented respectively, as ω=ω1Or ω=ω2When, system will produce
Raw resonance.ω0To vibrate the working frequency of flip flop screen, in antiresonance point and resonant frequency ω2Between.It is special by above x reversals of vibrations
Property analysis understand：In this region, system can obtain larger amplitude with less exciting force, so that Polyurethane sieve produces
Raw larger oscillation intensity and throwing damage number, can reduce the load that screen(ing) machine is born, significantly on the premise of screening quality is ensured
Extend the life-span of screen(ing) machine.
2nd, the analysis of y directions vibration characteristics
The foundation of y directions mechanical model
Similarly, the mechanical model in vibration flip flop screen y directions is established, as shown in Figure 6.In y directions, 2 plastids are not by compass screen surface
The constraint of elastic force, only by the resilient force of shock-absorbing spring and shear spring.
Equally, after ignoring damping, mechanical model can be reduced to as shown in Figure 7.
The vibration of y directions solves
Mechanical equation group is established according to Fig. 7 mechanical model
（7）
In formula：Exist for main screen frameyAcceleration on direction, m/s2；Exist for floating screen frameyAcceleration on direction,
m/s2。
Method for solving is identical with 2.1.2, omits herein.Drawn with its solutionyThe amplitude-versus-frequency curve in direction, such as Fig. 7 institutes
Show.
As shown in Figure 8, working frequency ω0In resonant frequency ω3Between antiresonance point, less than the frequency of antiresonance point.
Near working frequency, the amplitude of 2 plastids is all more stable, is influenceed by working environments such as temperature smaller.
Summarize：There is above analysis to understand, vibration flip flop screen relies on its unique structure, is driven with a less exciting force
2 mass vibratings, and produce larger amplitude and drive compass screen surface to do tension and relaxation motion.While solving material plug-hole, machine is reduced
The load that body is born, it is significant to the reliability for improving screen(ing) machine and the service life for extending screen(ing) machine, it is that one kind efficiently may be used
The coal deep screening equipment leaned on.
The utility model has advantages below：1st, relaxation motion is done in elastic polyurethane screen cloth face, can prevent glutinous wet stock
Viscous glutinous plug-hole；2nd, flip-flow screening machine can effectively be sieved to power raw coal, directly obtain the smalls product of golf calorific value, be simplified dynamic
Power coal sorting process, reduce processing cost；3rd, screen(ing) machine bears load and substantially reduced, service life length.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is the phase analysis figure of the utility model circular vibration inertial excitation power；
Fig. 3 is the utility model x directions Analysis on Mechanics Model figure；
Fig. 4 is the Analysis on Mechanics Model figure after the utility model x directions simplify；
Fig. 5 is the amplitude-versus-frequency curve figure in the utility model x directions；
Fig. 6 is the utility model y directions Analysis on Mechanics Model figure；
Fig. 7 is the Analysis on Mechanics Model figure after the utility model y directions simplify；
Fig. 8 is the amplitude-versus-frequency curve figure in the utility model y directions；
In figure：The main screen frame side plates of 1-, 2- fixed beams, 3- circular vibration vibrators, 4- walking beams, 5- floating screen frame side plates, 6-
Shear spring, 7- elastic polyurethane screen clothes, 8- damping springs.
Embodiment
Vibrate flip-flow screening machine, including two blocks of main screen frame side plates 1 being vertically supported are parallel solid between the main screen frame side plate 1
Surely there are more fixed beams 2, circular vibration vibrator 3 is further fixed on the main screen frame side plate 1；Between the fixed beam 2 at equal intervals
Long waist-shaped hole is provided with, walking beam 4 is installed with the long waist-shaped hole, the both ends of the walking beam 4 pass main sieve by long waist-shaped hole
The both ends of the surface of frame side plate 1, floating screen frame side plate 5, the floating screen frame side plate are fixed between the same side termination of the walking beam 4
5 are connected by shear spring 6 with the main outer surface of screen frame side plate 1, and polyurethane bullet is fixed between the walking beam 4 and fixed beam 2
Property screen cloth 7.
When it is implemented, elastic polyurethane screen cloth 7 fixed between the fixed beam 2 and walking beam 4 is tilted down and set
Put.The main screen frame side plate 1 is supported by shock-absorbing spring 8 and set.
In use, circular vibration vibrator 3 drives main screen frame side plate 1 to do circular vibration, long waist type is provided with main screen frame side plate 1
Hole, the both ends of walking beam 4 pass main screen frame side plate 1 by long waist-shaped hole, and logical with floating screen frame side plate 5 and main screen frame side plate 1
Shear spring 6 is crossed to connect.When circular vibration vibrator 3 excites main screen frame side plate 1 and fixed beam 2 is vibrated, shear spring 6 will shake
It is dynamic to pass to floating screen frame side plate 5 and walking beam 4.With the two distance change, drawing elasticity between fixed beam 2 and walking beam 4
Screen cloth does relaxation motion, so as to throw the material connect on Flexible sieve, produces dual-vibration, screening materials carrying can be made to produce close to 50
G oscillation intensity, much larger than common 5 g of vibratory sieve oscillation intensity.So as to greatly improve material screening efficiency, and can handle
Glutinous wet difficult screened material, is not easily blocked sieve aperture.Main screen frame side plate 1 is supported by damping spring 8, when can substantially reduce equipment operation
Caused noise, and buffer portion service load, mitigate impact, improve service life of equipment.
Claims (3)
1. one kind vibration flip-flow screening machine, it is characterised in that：Including two blocks of main screen frame side plates being vertically supported（1）, the main screen frame
Side plate（1）Between parallel be fixed with more fixed beams（2）, the main screen frame side plate（1）On be further fixed on circular vibration vibrator
（3）；The fixed beam（2）Between be provided with long waist-shaped hole at equal intervals, be installed with walking beam in the long waist-shaped hole（4）, the activity
Beam（4）Both ends main screen frame side plate is passed by long waist-shaped hole（1）Both ends of the surface, the walking beam（4）The same side termination between
It is fixed with floating screen frame side plate（5）, the floating screen frame side plate（5）Pass through shear spring（6）With main screen frame side plate（1）Outer surface
Connection, the walking beam（4）With fixed beam（2）Between be fixed with elastic polyurethane screen cloth（7）.
2. vibration flip-flow screening machine according to claim 1, it is characterised in that：The fixed beam（2）With walking beam（4）Between it is solid
Fixed elastic polyurethane screen cloth（7）Be tilted down setting.
3. vibration flip-flow screening machine according to claim 1 or 2, it is characterised in that：The main screen frame side plate（1）By shock-absorbing spring
（8）Support is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720238047.0U CN206652700U (en) | 2017-03-13 | 2017-03-13 | Vibrate flip-flow screening machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720238047.0U CN206652700U (en) | 2017-03-13 | 2017-03-13 | Vibrate flip-flow screening machine |
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| Publication Number | Publication Date |
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| CN206652700U true CN206652700U (en) | 2017-11-21 |
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ID=60315853
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883898A (en) * | 2019-03-21 | 2019-06-14 | 中国矿业大学(北京) | Kinetic characteristic and kinetic characteristics experimental rig and pilot system |
| CN110064486A (en) * | 2019-04-30 | 2019-07-30 | 福建南方路面机械有限公司 | A kind of decoration garbage recovery process |
| CN114042623A (en) * | 2021-11-08 | 2022-02-15 | 中国矿业大学 | Combined driving type circular vibration multilayer flip-flow screen |
-
2017
- 2017-03-13 CN CN201720238047.0U patent/CN206652700U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883898A (en) * | 2019-03-21 | 2019-06-14 | 中国矿业大学(北京) | Kinetic characteristic and kinetic characteristics experimental rig and pilot system |
| CN110064486A (en) * | 2019-04-30 | 2019-07-30 | 福建南方路面机械有限公司 | A kind of decoration garbage recovery process |
| CN110064486B (en) * | 2019-04-30 | 2021-03-02 | 福建南方路面机械股份有限公司 | Decoration garbage recycling process |
| CN114042623A (en) * | 2021-11-08 | 2022-02-15 | 中国矿业大学 | Combined driving type circular vibration multilayer flip-flow screen |
| CN114042623B (en) * | 2021-11-08 | 2023-02-28 | 中国矿业大学 | Combined driving type circular vibration multilayer flip-flow screen |
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