CN109926312A - Eccentric block and vibrator, vibrating screen with clump weight living - Google Patents
Eccentric block and vibrator, vibrating screen with clump weight living Download PDFInfo
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- CN109926312A CN109926312A CN201910308890.5A CN201910308890A CN109926312A CN 109926312 A CN109926312 A CN 109926312A CN 201910308890 A CN201910308890 A CN 201910308890A CN 109926312 A CN109926312 A CN 109926312A
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- clump weight
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The invention discloses a kind of eccentric blocks with clump weight living, including eccentric block chassis, clump weight living and spring, the class involute track of restricted clump weight scope of activities living and offer support force on the eccentric block chassis, clump weight living is arranged in class involute track, clump weight living can move back and forth close to main-shaft core with the position far from main-shaft core along the path of similar involute, eccentric block chassis is equipped with spring fixed seat, spring one end connects clump weight living, spring other end connecting spring fixing seat.The present invention is used for vibrator, vibrating screen, it is smaller to the rigidity and decrement that provide spring, it is compact-sized, vibrating screen resonance amplitude when starting stops passing through resonance region can be made to reduce, reduce dynamic load over the ground, not because cross large amplitude hit surrounding member and to screen(ing) machine ontology caused by adverse effect.
Description
Technical field
The present invention relates to vibrating screen technical field more particularly to vibrating screen eccentric blocks.
Background technique
In the prior art, vibrating screen, by motor, sieve nest, vibrator, support component, main shaft, eccentric block composition, there are also will
The vibrating motor of motor and vibrator unification.Motor drives the main shaft rotation of vibrator, is equipped with eccentric block, main shaft band on main shaft
Dynamic eccentric block rotation, centrifugal force, the inertia force of eccentric block eccentric mass drive screen(ing) machine high vibration, material are sieved by granularity
Divide processing.Eccentric block generates centrifugal force according to its eccentric weight and eccentricity when rotating at high speed, can drive the tens of tons of screen(ing) machines that weigh
Vibration, the amplitude of screen(ing) machine is related to screen(ing) machine weight and eccentric block bias statical moment, can calculate determination.When motor and main shaft work
In rated speed, the amplitude of screen(ing) machine is basicly stable constant, forms stable forced vibration, material it is smaller by influencing.Sieve
Machine ontology is steel construction, there is certain intrinsic frequency.Vibrating screen usually works in the frequency far from intrinsic frequency.If vibrating screen
Nominal vibration frequency work near the intrinsic frequency of screen(ing) machine, screen(ing) machine by generate resonance, amplitude is very big, and the variation shadow of material
Also larger, such title resonance screens are rung, are stablized because vibrating to be difficult to control by market, principal vibration sieve in market belongs to forced vibration
Dynamic type.But when screen(ing) machine starts, eccentric block rotation speed is started from scratch accelerations, can be by screen(ing) machine intrinsic frequency, at this time will generation
Resonant interaction, amplitude will be more than 5 times or more of specified amplitude at this time, and generate very big load over the ground, be also easy to produce foundation structure
Overload, covibration；The violent oscillatory motion of screen(ing) machine may hit periphery fixing component, generate to fixing component and screen(ing) machine ontology
Destruction；Resonance influenced by various aspects, motion profile be it is irregular, torsional movement therein will generate screen(ing) machine structure
Adverse effect；The significantly resonance of screen(ing) machine also will affect the stability that screen(ing) machine couples with motor drive；Shutdown phase passes through intrinsic
Frequency also has same adverse effect.Motor band eccentric block starts, and will need biggish starting torque, generates very big starting electricity
Stream generates adverse effect to motor, automatically controlled, power grid.
Therefore, it is necessary to reduce resonant interaction of the vibrating screen in starting and shutdown.Have in the prior art using vibration damping bottom
The mode of frame or damper reduces the resonance amplitude of screen(ing) machine, but vibration damping chassis cost is high, and damper also has bad shadow to screen(ing) machine
It rings.201520726899.5 provide a kind of eccentric block of swing to change the statical moment of friction speed, but to spring rate, pendulum
Dynamic eccentric block hanging column intensity requirement is high, and in rated speed when a certain range fluctuates, the variation of centrifugal force will lead to swing
The swing of eccentric block easily leads to hanging column and rotates frequently abrasion, swings eccentric block and mutually or with limited post hits；
201820033226.5 providing a kind of structure of dynamic eccentric block.The centrifugal force that dynamic eccentric block is held by spring, can be low in revolving speed
When reduce statical moment, but centrifugal force leans on spring overcoming completely, has very high spring rate and branch to spring and spring fixed column
Column intensity requirement.
More suitable mode is needed come resonant interaction when reducing starting and shutting down.
Summary of the invention
In order to reduce the ill-effect resonated when vibrating screen start and stop, the present invention provides a kind of bias with clump weight living
Block, the present invention also provides the vibrating screen for having used this eccentric block with clump weight living, this eccentric block with clump weight living,
Using class involute track, on the one hand the effect of class involute track is to limit the additional movements of clump weight living, on the other hand
It is to provide the support force for overcoming inertia force, it is smaller to the rigidity and decrement that provide spring, it is compact-sized, vibrating screen can be made to open
Resonance amplitude is reduced when dynamic stopping passes through resonance region, reduces dynamic load over the ground, does not hit surrounding member and to sieve because crossing large amplitude
Machine ontology causes adverse effect, and start and stop are steady, and this eccentric block with clump weight living is also applied for vibrating motor.
The technical solution adopted by the present invention is that a kind of eccentric block with clump weight living, including eccentric block chassis, clump weight living
And spring, restricted clump weight scope of activities living and the class involute track of support force is provided on the eccentric block chassis, and work is matched
Pouring weight is arranged in class involute track, and clump weight living can be along the path of similar involute close to main-shaft core and far from main shaft
The position at center moves back and forth, and eccentric block chassis is equipped with spring fixed seat, and spring one end connects clump weight living, the spring other end
Connecting spring fixing seat.Spring is to stretch curved spring, and stretching curved spring has pretightning force, and pretightning force holds clump weight living in the paraxial heart
Position, spring provide the spring force of clump weight return living.When main shaft is static and low speed rotation, clump weight living is in from main core
Close position, in main shaft high speed rotation, clump weight living is in the position remote from main core.
When motor drives main shaft and eccentric block to start, the speed of mainshaft is started from scratch accelerations, first reaches the resonance of screen(ing) machine frequently
Rate, at this point, clump weight living is in close to the position of main-shaft core, the centrifugal force of generation is smaller, and the exciting force provided is smaller.With altogether
It shakes 5 times that amplitude is specified amplitude and calculates, as long as the exciting force of resonance point is the 1/5 of specified exciting force, and resonance amplitude is etc.
In specified amplitude, because resonant frequency is less than work rated frequency, centrifugal force is also much smaller than specified centrifugal force.Centrifugal force F=
Mv^2/r or F=m ψ2R, when resonant frequency is rated frequency half, resonance centrifugal force only has the 1/4 of specified centrifugal force, therefore works as
When the eccentric block mass center statical moment of resonance point is the half of rated static torque, F=m0.25 ψ20.5r=0.125m ψ2R, that is, altogether
The exciting force of vibration point only has the 1/8 of specified exciting force.If resonant frequency is also lower than the half of rated frequency, resonate exciting force
It can also be lower.The statical moment for having served as resonance region is smaller, and required inertia force is smaller, and motor can faster pass through resonance region.
More particularly, the track on eccentric block chassis is class involute.Class involute track couple nearly shaft core position and
Remote shaft core position；Track is to provide a smooth track using class involute, makes clump weight living successfully in the pole of the paraxial heart
The extreme position of extreme position and the distal shaft heart can be moved smoothly；Class involute track can be the involute of standard, be also possible to wrap
The tangent line circular arc of the circle containing two extreme position tracks.Extreme position track is round to match with clump weight living, provides suitable track branch
Support force.
More particularly, class involute track is at least divided into three sections, the semi-circular track including nearly shaft core position, as counterweight living
The nearly heart positioning track of block, the class involute outside track including the moving track as clump weight living, including remote shaft core position
Semi-circular track, the telecentricity positioning track as clump weight living.The effect of track is to limit the scope of activities of clump weight living, limits volume
Outer movement, such as unwanted rotation；Track provides the support force for overcoming clump weight centrifugal force living simultaneously.
Clump weight living moves back and forth along the path of similar involute close to main-shaft core and deep position, can be with
Keep the mass center of clump weight living closer from main-shaft core when slowly running, the centrifugal force generated in resonant frequency is smaller.To make
This clump weight of living is stablized in low speed not to be displaced outwardly in the position close from main shaft, and a spring is needed to hold clump weight living,
Eccentric block chassis is equipped with spring fixed seat, and spring one end connects clump weight living, spring other end connecting spring fixing seat.
The centrifugal force of clump weight living provides support force by class involute track, but track support force has with clump weight centrifugal force
One angle, track support force and clump weight centrifugal force are synthetically produced the resultant force being displaced outwardly and connect because angle is big at this time
Nearly 180 degree, their resultant force are just smaller.As long as clump weight living is held with a lesser power, not because of gravity and low-speed centrifugal power
It is displaced outwardly.When being initiated through resonance region, clump weight living is in close to the position of main shaft, and the statical moment of generation is than specified static(al)
Square is small, and the centrifugal force of generation is much smaller, and the resonance of generation is also much smaller.When main shaft reaches rated speed fastly, clump weight living will be moved
Centrifugation extreme position is moved, specified exciting force is generated.When shutting down eccentric block deceleration, the centrifugal force of clump weight living reduces, and is drawn
To the position close to main shaft.Smaller than rated static torque by the statical moment generated when resonance region, the centrifugal force of generation is much smaller, produces
Raw resonance is also much smaller.
Because centrifugal force is smaller when resonance region, track support force and clump weight centrifugal force angle living are big, and track supports at this time
The composite force of power and clump weight centrifugal force living is more much smaller than centrifugal force, and required pulling force is smaller, provide the spring of pulling force rigidity and
Decrement can also be smaller, makes compact-sized.
After starting, when the speed of mainshaft exceeds resonant frequency, track support force and the composite force of clump weight centrifugal force living are more than
When the pulling force of spring, spring is just elongated, to make clump weight living be displaced outwardly from close to shaft core position, increasingly with revolving speed
Height, while increasing centrifugal force is generated, track support force and the composite force of clump weight centrifugal force are also increasing, to draw
Spring of moving is increasingly longer, until specified centrifugal force is generated to the centrifugation extreme position of clump weight living, so that work is in rated speed
With specified centrifugal force.Pulling force or pressure of the spring in extreme position should be less than one suitable numerical value of specified centrifugal force, so that
When the speed of mainshaft has the fluctuation of certain amplitude from rated speed, clump weight living will not the centripetal shifting with the small size reduction of centrifugal force
It is dynamic.I.e. the speed of mainshaft can be fluctuated in a certain range, but clump weight living can have been at extreme position.
When the speed of mainshaft has dropped certain amplitude, the state that power-off is shut down actually should be at, the speed of mainshaft declines always, when
When being supplied to the composite force of clump weight track support force living and clump weight centrifugal force living and being less than the pulling force of spring, counterweight BOB(beginning of block) living
It is moved along involute to close to main-shaft core position, reduces statical moment, to generate lesser resonance vibration in resonant frequency
Width.Meanwhile because clump weight mass center living is mobile to main-shaft core, inertia force is accelerating to reduce, and main shaft can be made faster to stall, faster
Pass through resonance region.
Clump weight living can also along the path of similar involute close to main-shaft core position and deep position back and forth
Mobile power is the resultant force of the support force of the centrifugal force of clump weight living, the pulling force of gravity and spring or track.
Preferably, it is symmetrically provided with two class involute tracks on the eccentric block chassis, is set in every class involute track
1 clump weight living is set, one end connecting spring fixing seat of curved spring is stretched in two positions, and the other end connects clump weight living, when counterweight living
When block is moved adjacent to the position in axle center, the centrifugal force that clump weight generates of not only living is few, and two clump weights living are in the horizontal direction
On centrifugal force can cancel out each other.
Preferably, it is additionally provided with straight guide on the eccentric block chassis, a clump weight living, straight guide is also provided in straight guide
Pressing spring is arranged in position far from axle center, and pressing spring squeezes clump weight living.
Preferably, loss of weight processing is carried out to the non-class involute orbital region on eccentric block chassis and non-straight guide rail area, made
Overall weight reduces and reduces the counteracting to counterweight.
Preferably, class involute track includes the internal rail of clump weight living and the outer rail of clump weight living, the internal rail of clump weight living
Match with the motion track of clump weight living.Enable clump weight living in the constraint of the internal rail of clump weight living and the outer rail of clump weight living
Lower movement has a adverse impact without generating additional movement, rotation.
Preferably, slot or the hole for filling counterweight are opened up on clump weight living.Clump weight living can be with additional bob-weight, counterweight living
Additional counterweight can be in the front of clump weight living on block, can also be in the reverse side of clump weight living, or penetrates through clump weight living.Counterweight living
Block of material and additional bob-weight material can be material more heavy than steel.Such as lead can provide larger in lesser volume
Eccentric weight.
Preferably, the track distal end of clump weight living can adjust the telecentricity position of clump weight living with mounting and adjusting cushion block.With
So that the specified centrifugal force provided is had different numerical value, different vibrating screen ginseng vibration weight can be matched and vibrating screen is made to generate different vibrations
Width adapts to different parameter of materials, throughput etc..
It is there are multiple working frequencies if it is vibrating screen, then should be considered with lowest operating frequency.So that screen(ing) machine is in most
When near low working frequency, it is still able to maintain the stabilization of clump weight living.
The present invention also provides a kind of vibrating motors, characterized in that the both ends of vibrating motor main shaft are equipped with including the above institute
State the eccentric block with clump weight living.
The present invention also provides a kind of vibrators, including vibrator main shaft and eccentric block, characterized in that vibrator main shaft has one
Root or two, vibrator main shaft both ends are equipped with including the above-mentioned eccentric block with clump weight living.
Preferably, the eccentric block of Double-axle vibrator makees synchronous backward movement, and the matched eccentric block eccentric weight of twin shaft is inconsistent, double
After the synthesis of shaft vibration power, oscillation trajectory is ellipse；The allotment ratio of double-shaft eccentric weight is different, and it is different can to form major and minor axis ratio
Elliptical vibration track.The adjustment of double-shaft eccentric weight is adjusted by the peculiar mode of the present invention.
The present invention also provides a kind of vibrating screens, by motor, sieve nest, vibrator, support component, vibrator main shaft, eccentric block
Composition, characterized in that the eccentric block including above-mentioned clump weight living is equipped on the vibrator main shaft of the vibrating screen.
Beneficial effects of the present invention: a kind of eccentric block with clump weight living is provided, can be used for vibrating screen, vibrating motor.
Movable clump weight is provided on eccentric block, the class of restricted clump weight scope of activities living and offer support force on eccentric block chassis
Involute track, clump weight living can be moved back along the path of similar involute close to main-shaft core and deep position
It is dynamic.On the one hand the effect of class involute track is to limit the additional movements of clump weight living, such as move out, unwanted rotation；
Class involute track provides the support force for overcoming inertia force simultaneously, when the Acceleration of starting stage and shuts down the decelerating phase, clump weight living
There is inertia force forward or backward, the side of track can limit it beyond scope of activities；When clump weight is moved to by paraxial
Heart position, it is also desirable to which track limits its extreme position；Vibrating screen resonance amplitude when starting stops passing through resonance region can be made to reduce,
Reduce dynamic load over the ground, not because cross large amplitude hit surrounding member and to screen(ing) machine ontology caused by adverse effect；And difference can be set
Vibration force, adapt to different host and application occasion；Start and stop can be made steady, make motor, automatically controlled, power grid is small by rush of current.
Detailed description of the invention
Fig. 1 is the static schematic diagram of eccentric block one embodiment with clump weight living of the invention.
Fig. 2 is the rated speed schematic diagram of eccentric block one embodiment with clump weight living of the invention.
Fig. 3 is the static schematic diagram of second embodiment of eccentric block with clump weight living of the invention.
Fig. 4 is the rated speed schematic diagram of second embodiment of eccentric block with clump weight living of the invention.
Fig. 5 is the rated speed schematic diagram of the eccentric block third embodiment with clump weight living of the invention.
Fig. 6 is the force analysis figure of work clump weight of the invention.
Fig. 7 is vibrating motor schematic diagram of the invention.
Fig. 8 is uniaxial vibrator schematic diagram of the invention.
Fig. 9 is Double-axle vibrator schematic diagram of the invention.
Figure 10 is synchronous vibrator schematic diagram of the invention.
Figure 11 is vibration excitor schematic diagram of the invention.
Figure 12 is vibration excited screen oscillating schematic diagram of the invention.
Figure 13 is vibrating motor vibrating screen schematic diagram of the invention.
Figure 14 is elliptical vibration device schematic illustration of the invention.
In figure, 1. eccentric block chassis；2. curved spring；3. clump weight living；4. class involute track；5. straight guide；6. pressing bullet
Spring；7. spring tension；8. clump weight centrifugal force living；9. outside track support force；10. vibrating motor；11. eccentric block；12. single shaft vibration
Dynamic device；13. Double-axle vibrator；14. synchronous vibrator；15. side plate vibration excitor；16. universal joint；17. vibrating screen；41. counterweight living
The internal rail of block；42. the outer rail of clump weight B living；121. uniaxial case；131. twin shaft case；141. synchronous casees；151. bearing block；171.
Sieve nest；172. girder；1411. synchromesh gear；1412. gear.
Specific embodiment
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Fig. 1 is the static schematic diagram of eccentric block one embodiment with clump weight living of the invention.In Fig. 1, eccentric block
Two class involute tracks 4 are symmetrically provided on chassis 1, class involute track 4 is at least divided into three sections, and half including nearly shaft core position
Circular orbit, as the nearly heart positioning track of clump weight 3 living, the class involute outer rail including the moving track as clump weight 3 living
Road, the semi-circular track including remote shaft core position can also include inner orbit as the telecentricity positioning track of clump weight 3 living.Every
1 clump weight 3 living is set in class involute track 4, and eccentric block chassis 1 is equipped with spring fixed seat, one end of two curved springs 2
Connecting spring fixing seat, the other end connect clump weight 3 living, when clump weight 3 living is moved adjacent to the position in axle center, as long as at this time
Curved spring 2 provides lesser pulling force and overcomes 3 whereabouts gravity of clump weight living that can be pulled in two clump weights 3 living close to the pole in axle center
Extreme position.When the speed of mainshaft resonance region and before the slow-speed of revolution when, the centrifugal force that clump weight 3 generates of not only living is less, and two
The centrifugal force of a clump weight living 3 in the horizontal direction and eccentric statical moment can cancel out each other, and externally provide the vibration force of very little.
Fig. 2 is the rated speed schematic diagram of eccentric block one embodiment with clump weight living of the invention.In Fig. 2, two
A clump weight living 3 under the action of the centrifugal force, overcomes the pulling force of curved spring 2, is moved to telecentricity extreme position, generates nominal vibration
Power, driving screen(ing) machine generate specified amplitude.
Fig. 3 is the static schematic diagram of second embodiment of eccentric block of the present invention with clump weight living.It is with aforementioned counterweight living
Block moves the synthesis plus linear movement along class involute.Eccentric block chassis 1 is equipped with class involute track 4 and straight guide 5, directly
Guide rail 5 is adjacent with the limit of sports record position of work clump weight 3 in class involute track 4, and counterweight living is arranged in class involute track 4
Block 3 sets another clump weight 3 of living, 3 connecting bending spring of clump weight, 2 one end living in class involute track 4, curved spring in straight guide 5
2 other end connecting spring fixing seat, spring fixed seat are arranged on eccentric block chassis 1, and straight guide 5 is set far from the position in axle center
Pressing spring 6 is set, pressing spring 6 squeezes the work clump weight 3 in straight guide 5, and a clump weight 3 living is moved along class involute track 4, separately
One clump weight 3 living is moved along straight guide 5.When main shaft be in static or resonance region and before when slowly running, class involute
Clump weight 3 is lived in the extreme position close to axle center in work clump weight 3 and straight guide 5 in track 4, generates lesser vibration force；
After the speed of mainshaft is more than resonance region, centrifugal force will make two clump weights living mobile to telecentricity extreme position.
Fig. 4 is the rated speed schematic diagram of second embodiment of eccentric block with clump weight living of the invention.In Fig. 4, two
A clump weight living 3 under the action of the centrifugal force, overcomes the pulling force of curved spring 2 and the support force of pressing spring 6, is moved to telecentricity limit position
It sets, generates nominal vibration power, driving screen(ing) machine generates specified amplitude.
Fig. 5 is the rated speed schematic diagram of the eccentric block third embodiment with clump weight living of the invention.In this figure
Mainly there is the following on eccentric block chassis 1: reducing the negative counterweight on eccentric block chassis 1 by improvement, the opposite side in weighted areas
To (non-class involute orbital region and non-straight guide rail area), loss of weight processing is carried out, overall weight is made to reduce and reduce to counterweight
Counteracting；Class involute track 4 includes the internal rail 41 of clump weight living and the outer rail 42 of clump weight living, the internal rail 41 of clump weight living with
The motion track of clump weight 3 living matches, and enables clump weight 3 living in the outer rail 42 of the internal rail 41 of clump weight living and clump weight of living
The lower movement of constraint has a adverse impact without generating additional movement, rotation；Also make straight guide 5 and class involute track 2
Both ends are all connected with axle sleeve, increase the rigidity of track；It is provided with filling hole on clump weight 3 living, can be combined with different filling blocks
Different counterweight out generates different vibration forces.
Requirement of the vibrating screen of different model to vibration force is different, therefore, opens up on clump weight 3 living for filling counterweight
Slot or hole, clump weight 3 living, so that the specified centrifugal force provided has different numerical value, can match different vibrations with additional bob-weight
Dynamic sieve joins vibration weight and vibrating screen is made to generate different amplitudes, adapts to different parameter of materials, throughput etc..If it is vibrating screen
It is there are multiple working frequencies, then should be considered with lowest operating frequency.When so that screen(ing) machine being near lowest operating frequency, remain to
Keep the stabilization of clump weight 3 living.Open up slot or the hole for filling counterweight on the clump weight living 3, counterweight block of material living can be with
It is material more heavy than steel.Such as lead can provide biggish eccentric weight in lesser volume.It is attached on clump weight 3 living
The counterweight added can also fill in the front of clump weight living in the reverse side of clump weight living, or in aperture on clump weight of living.
The track distal end of clump weight 3 living can adjust the telecentricity position of clump weight 3 living with mounting and adjusting cushion block.So as to mention
The specified centrifugal force supplied has different numerical value, can match different vibrating screen ginseng vibration weight and vibrating screen is made to generate different amplitudes,
Adapt to different parameter of materials, throughput etc..
Fig. 6 is the force analysis figure of work clump weight of the invention.In eccentric block rotation, power suffered by clump weight 3 living has
Balance weight centrifugal power 8 living, outside track support force 9, spring tension 7.Because track is class involute, outside track support force 9 is matched with work
Will form an angle close to 180 degree between pouring weight centrifugal force 8, their resultant force towards the centrifugation distal end of track, one compared with
Small resultant force, this resultant force+clump weight living gravity are needed in eccentric block rotary rpm before resonance region with spring tension 7
It balances, spring tension 7 provides pretightning force, before resonance region, all holds clump weight 3 living in the paraxial of class gradually shape track
Heart end makes counterweight 3 living provide least eccentric moment；After eccentric block revolving speed has been more than resonance region, outside track support force 9 and work
The resultant force of clump weight centrifugal force 8 is more than spring tension 7 (gravity of clump weight 3 living is comparatively small to be disregarded), and eccentric block living just starts
It is moved along involute track to off-axis heart distal end.Clump weight 3 of living before reaching rated speed should move to reach involute track
Centrifugation distal end.In clump weight moving process living, the pulling force of spring is also increasing, but outer rail is not to be exceeded in the increase of spring tension
The increase of the resultant force of road support force 9 and clump weight centrifugal force 8 living, this just needs the suitable rigidity of spring.
Fig. 7 is vibrating motor schematic diagram of the invention.Vibrating motor 10 is that end cap, both ends are stretched out in the main shaft both ends of motor
Spindle nose respectively hangs one or two eccentric block 11 and provides vibration force when vibrating motor 10 rotates.Its vibration force be it is variable, generally
It is realized by changing the angle of eccentric block.The present invention can be realized by changing the weight of clump weight living.Pass through additional bob-weight
Or change the thickness of clump weight living, and the different material of replacement specific gravity, filling hole etc., the weight of all changeable clump weight living, thus
It realizes and changes entire eccentric block in the vibration force of rated speed.
Fig. 8 is uniaxial vibrator schematic diagram of the invention.There are main shaft, bearing etc. in the uniaxial case 121 of uniaxial vibrator 12,
Main shaft both ends respectively fill one piece of eccentric block 11, are coupled by motor drive and eccentric block 11 is driven to rotate, so that uniaxial vibrator 12 produces
Raw required vibration force, the adjustment of vibration force see above description.The track that this vibration force generates is circle.
Fig. 9 is Double-axle vibrator schematic diagram of the invention.There are twin shaft and bearing in the twin shaft case 131 of Double-axle vibrator 13
Synchronized rotation is driven by two motors respectively Deng, twin shaft, direction of rotation can also be opposite rotation on the contrary, Fig. 9 show opposite direction rotating
Turn.The twin shaft of reverse phase rotation will form pull(ing) effect, and the vibration force in two axis on line directions is cancelled out each other because contrary, with two
The vibration force of axis on line direction vertical direction synthesizes superposition.Motion profile is the linear motion perpendicular to twin shaft on line.It is suitble to close
Level puts sieve, and the higher linear vibrating screen of moisture content uses.
Figure 10 is synchronous vibrator schematic diagram of the invention.There are three axis, two side axles in the synchronization case 141 of synchronous vibrator 14
For wobbler shaft, jackshaft is gear shaft；Synchromesh gear 1411 shown in Figure 10 is mounted on outside synchronous case 141 with gear 1412,
Mountable to synchronize in case 141, lubricating condition is more preferable；The axis of gear shaft is not necessarily intended in the on line of wobbler shaft, is not existed
In wobbler shaft on line, volume can be reduced.By the transmission of intermediate gear shaft, two eccentric shafts formed it is in the same direction move synchronously,
Vibration force is superimposed, and biggish vibration force can be provided, and bearing designation is smaller, and box height is smaller.It is suitble to large-scale vibration
Dynamic sieve uses.
Figure 11 is side plate vibration excitor schematic diagram of the invention.Main shaft is installed in the bearing block 151 of side plate vibration excitor 15, it is main
The bearing block 151 of axis two sides setting-up eccentricity block 11, side plate vibration excitor 15 can be mounted on the macropore of side plate, and side plate vibration excitor 15 is straight
It connects in transmitting vibration force to side plate, vibrating screen is made to generate vibration.
Figure 12 is vibration excited screen oscillating schematic diagram of the invention.The bearing block 151 of side plate vibration excitor 15 is mounted on vibrating screen
On the macropore of 17 side plate 171, is coupled between both side plate vibration excitor 15 by universal joint 16, the vibration force of in-phase synchronization is provided,
Vibrating screen 17 generates synchronous vibration.Two sets of vibration excitors can also be installed, movement synthesizes linear motion, referred to as straight-line oscillation
Sieve.
Figure 13 is vibrating motor vibrating screen schematic diagram of the invention.Vibrating motor 10 or uniaxial vibrator 12, dual-axis vibration
Device 13,1 synchronous vibrator 4 are both needed to be mounted on the girder 172 of vibrating screen 17, and the vibration force that vibrator generates passes through girder 172
It is transmitted on whole vibrating screen 17, driving sieves 17 generation vibrations.
Figure 14 is elliptical vibration device schematic illustration of the invention.Double-axle vibrator shown in Fig. 9 is matched on general twin shaft partially
Heart block vibration force is identical, but matched eccentric block vibration force is difference on elliptical vibration device twin shaft, and different size is usually used
Eccentric block or different clump weight or eccentric block difference angle are realized.The eccentric block of Double-axle vibrator makees synchronous backward movement, double
The matched eccentric block eccentric weight of axis is inconsistent, and after the synthesis of dual-axis vibration power, oscillation trajectory is ellipse；The allotment ratio of double-shaft eccentric weight
Example is different, can form the different elliptical vibration track of major and minor axis ratio.The present invention is in not existing bias using above-mentioned clump weight living
Square realizes that providing different vibration forces can be used on elliptically vibrating screen to form elliptical vibration device.Equipped with bias in diagram
When the twin shaft of power W1 and W2 are in a-b-c-d out of phase, the result that W1 and W2 is synthesized is different, or is added or offsets, final to close
At vibration force be size be an ellipse, the ellipse of the vibrating screen generation a '-b '-s '-d ' of ginseng vibration weight W can be made
Movement.
Vibrating screen shown in figure 12 above, Figure 13 can be in the start and stop stage with the eccentric block with clump weight living of the invention
Resonance is reduced, and different vibration forces can be set, adapts to different host and application occasion.Start and stop can be made steady, make motor, electricity
Control, power grid are small by rush of current.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of eccentric block with clump weight living, including eccentric block chassis, clump weight living and spring, it is characterized in that: the bias
The class involute track of restricted clump weight scope of activities living and offer support force on block chassis, clump weight setting living are gradually opened in class
In trajectory, clump weight living can be moved back along the path of similar involute close to the position of main-shaft core and separate main-shaft core
Dynamic, spring is to stretch curved spring, and eccentric block chassis is equipped with spring fixed seat, and spring one end connects clump weight living, and spring is another
Hold connecting spring fixing seat.
2. the eccentric block according to claim 1 with clump weight living, characterized in that be symmetrically provided on the eccentric block chassis
1 clump weight living is arranged in every class involute track for two class involute tracks, and two stretch one end connection bullet of curved springs
Spring fixing seat, the other end connect clump weight living.
3. the eccentric block according to claim 1 with clump weight living, characterized in that the class involute track is at least divided into
Three sections, the semi-circular track including nearly shaft core position, as the nearly heart positioning track of clump weight living, including the shifting as clump weight living
The class involute outside track in dynamic rail road, the semi-circular track including remote shaft core position, the telecentricity positioning track as clump weight living.
4. the eccentric block according to claim 1 with clump weight living, characterized in that be additionally provided on the eccentric block chassis straight
Guide rail is also provided with a clump weight living in straight guide, and pressing spring is arranged far from the position in axle center in straight guide, and pressing spring squeezes work and matches
Pouring weight.
5. the eccentric block according to claim 1 with clump weight living, characterized in that the non-class involute on eccentric block chassis
Orbital region and non-straight guide rail area carry out loss of weight processing.
6. the eccentric block according to claim 1 with clump weight living, characterized in that class involute track includes clump weight living
Internal rail and clump weight living outer rail, the internal rail of clump weight living and the motion track for clump weight of living match.
7. a kind of vibrating motor, characterized in that the both ends of vibrating motor main shaft are equipped with as claimed in any one of claims 1 to 6
Eccentric block with clump weight living.
8. a kind of vibrator, including vibrator main shaft and eccentric block, characterized in that vibrator main shaft has one or two, vibration
Device main shaft both ends are equipped with the eccentric block as claimed in any one of claims 1 to 6 with clump weight living.
9. vibrator according to claim 8, characterized in that the eccentric block of Double-axle vibrator makees synchronous backward movement, double
The matched eccentric block eccentric weight of axis is inconsistent, and after the synthesis of dual-axis vibration power, oscillation trajectory is ellipse；The allotment ratio of double-shaft eccentric weight
Example is different, can form the different elliptical vibration track of major and minor axis ratio.
10. a kind of vibrating screen, by motor, sieve nest, vibrator, support component, vibrator main shaft, eccentric block composition, characterized in that
Eccentric block with clump weight living described in claim 1-7 any one is installed on the vibrator main shaft of the vibrating screen.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308890.5A CN109926312B (en) | 2019-04-17 | 2019-04-17 | Eccentric block with movable balancing weight, vibrator and vibrating screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308890.5A CN109926312B (en) | 2019-04-17 | 2019-04-17 | Eccentric block with movable balancing weight, vibrator and vibrating screen |
Publications (2)
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| CN109926312A true CN109926312A (en) | 2019-06-25 |
| CN109926312B CN109926312B (en) | 2023-06-16 |
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| CN201910308890.5A Active CN109926312B (en) | 2019-04-17 | 2019-04-17 | Eccentric block with movable balancing weight, vibrator and vibrating screen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114146902A (en) * | 2021-11-24 | 2022-03-08 | 南昌矿机集团股份有限公司 | Vibration sieve vibration reduction resonance eccentric block and vibration motor |
| CN115055248A (en) * | 2022-07-25 | 2022-09-16 | 长沙米淇仪器设备有限公司 | Vibration grinding machine convenient to adjust |
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| CN103623997A (en) * | 2013-11-30 | 2014-03-12 | 信宜市恒大机械设备厂 | Vibrating screen |
| CN206334832U (en) * | 2016-12-20 | 2017-07-18 | 中煤科工集团唐山研究院有限公司 | A kind of box vibrator that the oval exciting force of forced synchronism is provided |
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| US4480754A (en) * | 1981-12-14 | 1984-11-06 | Damas Maskinfabrik A/S | Screening apparatus for grains, seeds or the like crops |
| CN1501845A (en) * | 2000-08-09 | 2004-06-02 | ·��άϣ��ʯ�����豸����˾ | Exciter apparatus |
| WO2013167133A1 (en) * | 2012-05-11 | 2013-11-14 | Alvibra A/S | Industrial sieve for separation of materials |
| CN103623997A (en) * | 2013-11-30 | 2014-03-12 | 信宜市恒大机械设备厂 | Vibrating screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114146902A (en) * | 2021-11-24 | 2022-03-08 | 南昌矿机集团股份有限公司 | Vibration sieve vibration reduction resonance eccentric block and vibration motor |
| CN115055248A (en) * | 2022-07-25 | 2022-09-16 | 长沙米淇仪器设备有限公司 | Vibration grinding machine convenient to adjust |
| CN115055248B (en) * | 2022-07-25 | 2023-10-20 | 长沙米淇仪器设备有限公司 | Vibration grinding machine convenient to adjust |
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| Publication number | Publication date |
|---|---|
| CN109926312B (en) | 2023-06-16 |
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Address after: 330004 No. 300, Hongwan Avenue, Wanli District, Nanchang City, Jiangxi Province Applicant after: Nanchang Mining Machinery Group Co.,Ltd. Address before: 330004 No. 300, Hongwan Avenue, Wanli District, Nanchang City, Jiangxi Province Applicant before: NANCHANG MINERAL SYSTEMS Co.,Ltd. |
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