CN102091690B - Four-shaft forced synchronization variable linear uniform-thickness vibrating screen and screening method thereof - Google Patents
Four-shaft forced synchronization variable linear uniform-thickness vibrating screen and screening method thereof Download PDFInfo
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- CN102091690B CN102091690B CN 201010530840 CN201010530840A CN102091690B CN 102091690 B CN102091690 B CN 102091690B CN 201010530840 CN201010530840 CN 201010530840 CN 201010530840 A CN201010530840 A CN 201010530840A CN 102091690 B CN102091690 B CN 102091690B
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- 238000012216 screening Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 88
- 230000033001 locomotion Effects 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 239000004744 fabric Substances 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 230000005284 excitation Effects 0.000 abstract description 3
- 239000003245 coal Substances 0.000 abstract description 2
- 238000007873 sieving Methods 0.000 description 4
- 238000013519 translation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- -1 smelting Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 230000010355 oscillation Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
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- 238000009738 saturating Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a four-shaft forced synchronization variable linear uniform-thickness vibrating screen and a screening method thereof which are suitable for size grading and drainage of raw coal, ores and other materials. The vibrating screen comprises a screen box, a screen box support, a spring, a synchronizing gear and a vibration exciter, wherein the vibration exciter comprises motors and transmission shafts with eccentric blocks, and gears are arranged on the transmission shafts which are connected with the motors through shaft couplings; two transmission shafts are arranged on the obliquely upward side of the mass center of the screen box, and the resultant excitation force of the two transmission shafts passes through the mass center of the screen box; and the other two transmission shafts are arranged on the other obliquely upward side of the mass center of the screen box, and the resultant excitation force of the other two transmission shafts does not passes through the mass center of the screen box. The stroke of the generated variable linear track is gradually reduced from a feed end to a discharge end, which changes the motion mode of the traditional translational vibrating screen that which the track and strength of the points on the screen surface are both the same. According to the vibrating screen provided by the invention, at the feed end, the movement speed of the material is fast, the material layer is rapidly thinned and layered, and at the discharge end, the material delivery speed is slowed down, the layering is enhanced and the chance of the material passing through the screen is increased, the characteristic of uniform thickness is showed. The entire vibrating screen has the advantages of simple structure and high screening efficiency.
Description
Technical field:
The present invention relates to a kind of vibratory sieve and method for sieving thereof, especially a kind of four axle forced synchronism for industries such as mine, coal, smelting, building materials, refractory material, light industry, chemical industry, medicine, food straighten line equal-thickness vibrating screen and method for sieving thereof.
Background technology:
In the domestic and international linear vibrating screen that proposes, generally be twin shaft at present, motion mode mostly is translation, and related change track vibrating screen mainly contains: CN01213819.3.This relates to a kind of change ellipse and straightens the line vibration type screen, vibratory sieve is provided with two motors and with the vibrating shaft of eccentric mass, main by changing the eccentric mass square mr of each vibrating shaft, realize becoming oval and straighten the line motion, yet, in the actual installation process, very high to the required precision of the relative position of the centre of force and barycenter, very easily produce the motion wild effect; In addition, the current equal-thickness vibrating screen that proposes mostly adopts the mode that becomes screen angle to realize screening with constant bed thickness, but its compass screen surface segmentation Limited Number, thereby exist on the compass screen surface sudden change of impelling ability, the defective such as excessive, too high the manufacturings difficulty of discontinuous and vibratory sieve volume, occupation of land space are large.
Linear vibrating screen normally is comprised of screen box, base and vibrator (or vibrating motor), and vibrator comprises motor and with the vibrating shaft of eccentric block, the rotation of driven by motor vibrating shaft namely produces centrifugal intertia force, thereby makes vibratory sieve do translation.When the centre of force of centrifugal intertia force overlapped with the whole barycenter of sieve box of vibrating, sieve box of vibrating integral body was done translation, and the movement locus of each point is all identical with the center of mass motion track on the screen box.Movement locus, transporting velocity and the throwing index etc. that are the screen box each point are all identical, and the compass screen surface movement locus is single, and the compass screen surface motion mode is undesirable, thereby screening efficiency is not high; Although the dual-axis vibration sieve is simple in structure, be convenient to installation, yet be limited by the size of oscillation intensity, be unfavorable for that vibratory sieve is to maximization, heavy-duty development.Equal thick screen compass screen surface motion mode can make material keep identical thickness at compass screen surface, reach comparatively desirable compass screen surface motion mode, but equal thick screen sieve nest height is large, and the occupation of land space is larger, and the sieve nest complex structure is difficult for processing simultaneously, and the maintenance capacity during use is also large.
Summary of the invention:
Technical problem: the objective of the invention is to overcome the weak point in the prior art, provide a kind of processing simple in structure, easy, four axle forced synchronism that screening effect is good to straighten line screening with constant bed thickness method and vibratory sieve.
Technical scheme: four axle forced synchronism of the present invention straighten the line equal-thickness vibrating screen, comprise screen box that sieve plate and screen cloth form, supporting screen box bearing, be located at spring on the bearing, be located at power transmission shaft on the sieve plate, be located at eccentric block, motor, shaft coupling on the power transmission shaft, described power transmission shaft is four, the first power transmission shaft is identical with eccentric block structure on the second driving shaft, and the 3rd power transmission shaft is identical with eccentric block structure on the 4th power transmission shaft; Four power transmission shafts are located at respectively the top of the whole barycenter of screen box, and the 3rd power transmission shaft and the 4th power transmission shaft are spaced, and screen cloth is horizontally disposed with, and its axial connecting line is with perpendicular through the position of axle center line mid point and barycenter, and the horizontal sextant angle of position is δ; The first power transmission shaft and second driving shaft are spaced, corresponding with the 3rd power transmission shaft and the 4th power transmission shaft, its axial connecting line is with perpendicular with the position that departs from barycenter through axle center line mid point, the horizontal sextant angle of position is β, the horizontal range that departs from barycenter and barycenter is L, be respectively equipped with intermeshing synchromesh gear on second driving shaft and the 3rd power transmission shaft, four power transmission shafts connect three or four motor through shaft coupling.
Described horizontal sextant angle δ is 5 °~45 °; Horizontal sextant angle β is 45 °~85 °, departs from barycenter and barycenter horizontal range L is 0.1~0.5m; Eccentric block mass-radius product on described four power transmission shafts all equates; The 3rd power transmission shaft in described four power transmission shafts and the eccentric block mass-radius product of the 4th power transmission shaft equate that the eccentric block mass-radius product of the first power transmission shaft and second driving shaft equates.
Four axle forced synchronism of the present invention straighten line screening with constant bed thickness method: in the situation that the eccentric block mass-radius product all equates on four power transmission shafts, three or four motor that startup links to each other with four power transmission shafts, under the effect of synchromesh gear, second driving shaft and the operation of the 3rd power transmission shaft synchronous backward, the 3rd power transmission shaft and the operation of the 4th power transmission shaft synchronous backward, its synthetic exciting force position passes through barycenter, simultaneously, the first power transmission shaft and the operation of second driving shaft synchronous backward, its synthetic exciting line of action of force is by departing from barycenter, at this moment, the movement locus of vibratory sieve is and straightens line tracking, and material is fed from feeding end, and the movement locus that material straightens line along vibratory sieve is forward constantly thoroughly when sieve, be uniform thickness and be distributed on the compass screen surface, move to discharge end gradually.
Beneficial effect: (1) passes through the compass screen surface realization at zero inclination angle to the screening with constant bed thickness of material, has changed tradition and has passed through the form that the change screen angle is realized screening with constant bed thickness, has avoided the complexity of many inclination angles of Design and manufacture compass screen surface; (2) adopt three or four motors and four power transmission shafts, larger excitation intensity can be provided, applicable to the vibratory sieve of large sieving area; (3) can by adjusting separately the eccentric mass-radius product of the first power transmission shaft and second driving shaft, adjust easily vibrating direction angle and the amplitude of material movement on the sieve box of vibrating; Also can by adjusting separately the eccentric mass-radius product of the 3rd power transmission shaft and the 4th power transmission shaft, adjust easily vibrating direction angle and the amplitude of the upper material movement of sieve box of vibrating motion.
Description of drawings:
Fig. 1 is the main TV structure schematic diagram that four axle forced synchronism of the present invention straighten the line equal-thickness vibrating screen.
Fig. 2 is the plan structure schematic diagram that four axle forced synchronism of the present invention straighten the line equal-thickness vibrating screen.
Among the figure: 1,2,3, the 4-power transmission shaft, 5-sieve plate, 6-bearing, 7-motor cabinet, 8-spring, 9-screen cloth, 10-motor, 11-synchromesh gear, 12-shaft coupling.
The specific embodiment:
The invention will be further described below in conjunction with the embodiment in the accompanying drawing:
Four axle forced synchronism of the present invention straighten the line equal-thickness vibrating screen, mainly formed by screen box, screen box support, power transmission shaft, synchromesh gear, vibrator, screen box mainly is comprised of screen cloth 9 and the sieve plate 5 that is fixed on screen cloth 9 both sides, the screen box support mainly is comprised of the bearing 6 and the spring 8 that are located at screen box front and back two-side supporting screen box, spring 8 is located on the bearing 6, screen cloth 9 is horizontally disposed with, screen box top is provided with four power transmission shafts that are fixed on the sieve plate 5, eccentric block, motor 10, shaft coupling 12, power transmission shaft are four, and the eccentric block mass-radius product on four power transmission shafts all equates; Or the eccentric block mass-radius product of the 3rd power transmission shaft 3 in four power transmission shafts and the 4th power transmission shaft 4 equates that the eccentric block mass-radius product of the first power transmission shaft 1 and second driving shaft 2 equates.The first power transmission shaft 1 is identical with eccentric block structure on the second driving shaft 2, and the 3rd power transmission shaft 3 is identical with eccentric block structure on the 4th power transmission shaft 4; Four power transmission shafts are located at respectively the top of the whole barycenter O of screen box, and the three or four power transmission shaft is located at the oblique upper of screen box barycenter, and its synthetic exciting force is by screen box barycenter O; The first second driving shaft is located at screen box barycenter opposite side oblique upper, and its synthetic exciting force is not by the screen box barycenter.The stroke that straightens line tracking that produces diminishes from the feeding end to the discharge end gradually.The 3rd power transmission shaft 3 and the 4th power transmission shaft 4 are spaced, and its axial connecting line is with perpendicular through the position a of axle center line mid point and barycenter O, and the horizontal sextant angle of position a is δ, and horizontal sextant angle δ is 5 °~45 °; Horizontal sextant angle β is 45 °~85 °, departs from barycenter o
1L is 0.1~0.5m with barycenter O horizontal range.The first power transmission shaft 1 and second driving shaft 2 are spaced, and be corresponding with the 3rd power transmission shaft 3 and the 4th power transmission shaft 4, its axial connecting line with through axle center line mid point with depart from barycenter o
1Position b perpendicular, the horizontal sextant angle of position b is β, departs from barycenter o
1With the horizontal range of barycenter O be L, be respectively equipped with 11, four power transmission shafts of intermeshing synchromesh gear on second driving shaft 2 and the 3rd power transmission shaft 3 and connect three or four motor 10 through shaft coupling 12.
Four axle forced synchronism of the present invention straighten line screening with constant bed thickness method: in the situation that the eccentric block mass-radius product all equates on four power transmission shafts, three or four motor 10 that startup links to each other with four power transmission shafts, under the effect of synchromesh gear 11, second driving shaft 2 and the operation of the 3rd power transmission shaft 3 synchronous backwards, the 3rd power transmission shaft 3 and the operation of the 4th power transmission shaft 4 synchronous backwards, its synthetic exciting force position a is by barycenter O, simultaneously, the first power transmission shaft 1 and the operation of second driving shaft 2 synchronous backwards, its synthetic exciting line of action of force b is by departing from barycenter o
1At this moment, the movement locus of vibratory sieve is and straightens line tracking, and material is fed from feeding end, and material is at the vibratory sieve feeding end straightens line fast along oscillating screen movement locus forward constantly thoroughly in the sieve, the rapid attenuation of the bed of material and layering, be uniform thickness and be distributed on the compass screen surface, gradually to discharge end operation, discharge end mass transport speed slows down, layering reinforcement, the saturating screen(ing) machine of material can increase, be the uniform thickness feature, that realizes vibratory sieve straightens the line movement locus.
Claims (2)
1. an axle forced synchronism straightens the line equal-thickness vibrating screen, comprise the screen box that is formed by sieve plate (5) and screen cloth (9), the bearing (6) of supporting screen box, be located at the spring (8) on the bearing (6), be located at the power transmission shaft on the sieve plate (5), be located at the eccentric block on the power transmission shaft, motor (10), shaft coupling (12), described power transmission shaft is four, the first power transmission shaft (1) is identical with eccentric block structure on the second driving shaft (2), and the 3rd power transmission shaft (3) is identical with eccentric block structure on the 4th power transmission shaft (4); It is characterized in that: screen cloth (9) is horizontally disposed with, four power transmission shafts are located at respectively the top of the whole barycenter of screen box (O), the 3rd power transmission shaft (3) and the 4th power transmission shaft (4) are spaced, the axial connecting line of the 3rd power transmission shaft (3) and the 4th power transmission shaft (4) is with perpendicular through first position (a) of axle center line mid point and barycenter (O), and the horizontal sextant angle of the first position (a) is δ; The first power transmission shaft (1) and second driving shaft (2) are spaced, corresponding with the 3rd power transmission shaft (3) and the 4th power transmission shaft (4), the axial connecting line of the first power transmission shaft (1) and second driving shaft (2) with through axle center line mid point with depart from barycenter (o
1) the second position (b) perpendicular, the horizontal sextant angle of the second position (b) is β, departs from barycenter (o
1) with the horizontal range of barycenter (O) be L, be respectively equipped with intermeshing synchromesh gear (11) on second driving shaft (2) and the 3rd power transmission shaft (3), four power transmission shafts connect three or four motor (10) through shaft coupling (12);
Described horizontal sextant angle δ is 5 °~45 °; Horizontal sextant angle β is 45 °~85 °, departs from barycenter (o
1) with barycenter (O) horizontal range L be 0.1~0.5m.
One kind as claimed in claim 1 four axle forced synchronism of vibratory sieve straighten line screening with constant bed thickness method, it is characterized in that: screen cloth (9) is horizontally disposed with, in the situation that the eccentric block mass-radius product all equates on four power transmission shafts, three or four motor (10) that startup links to each other with four power transmission shafts, under the effect of synchromesh gear (11), second driving shaft (2) and the operation of the 3rd power transmission shaft (3) synchronous backward, the 3rd power transmission shaft (3) and the operation of the 4th power transmission shaft (4) synchronous backward, first position (a) of the synthetic exciting force of the 3rd power transmission shaft (3) and the 4th power transmission shaft (4) is by barycenter (O), simultaneously, the first power transmission shaft (1) and the operation of second driving shaft (2) synchronous backward, second position (b) of the synthetic exciting force of the first power transmission shaft (1) and second driving shaft (2) is by departing from barycenter (o
1), at this moment, the movement locus of vibratory sieve is and straightens line tracking, and material is fed from feeding end, and the movement locus that material straightens line along vibratory sieve constantly thoroughly when sieve, is uniform thickness and is distributed on the compass screen surface forward, moves to discharge end gradually.
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CN 201010530840 CN102091690B (en) | 2010-10-30 | 2010-10-30 | Four-shaft forced synchronization variable linear uniform-thickness vibrating screen and screening method thereof |
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CN 201010530840 CN102091690B (en) | 2010-10-30 | 2010-10-30 | Four-shaft forced synchronization variable linear uniform-thickness vibrating screen and screening method thereof |
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CN102091690B true CN102091690B (en) | 2013-10-30 |
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Families Citing this family (4)
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CN108744664A (en) * | 2018-06-19 | 2018-11-06 | 三川德青工程机械有限公司 | A kind of slurry balance shield slurry dewatering vibrating screen |
CN109530216A (en) * | 2019-01-11 | 2019-03-29 | 中国矿业大学 | A kind of four axis change linear uniform-thickness vibrating screen and method for oscillating of intelligent control |
CN111842125A (en) * | 2020-08-08 | 2020-10-30 | 鞍山重型矿山机器股份有限公司 | Large screening machine with self-synchronous synthetic linear track of single-shaft vibration exciter |
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 |
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CN2465821Y (en) * | 2001-01-03 | 2001-12-19 | 西南石油学院 | Changeable ellipse and changeable straight line vibration type vibration screen |
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