CN1201873C - Vibrating screen actuated by dual frequencies - Google Patents
Vibrating screen actuated by dual frequencies Download PDFInfo
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- CN1201873C CN1201873C CN 03124558 CN03124558A CN1201873C CN 1201873 C CN1201873 C CN 1201873C CN 03124558 CN03124558 CN 03124558 CN 03124558 A CN03124558 A CN 03124558A CN 1201873 C CN1201873 C CN 1201873C
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- screen box
- vibration
- screen
- vibration exciter
- isolation spring
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Abstract
The present invention relates to a complex frequency excited vibration screen which comprises a screen box, main vibration exciters, a primary isolation spring and a base, wherein the screen box is connected to the base through the primary isolation spring; the main vibration exciters are fixedly connected to both sides of the screen box; an auxiliary vibration exciter is fixedly connected to the central position on the screen box. The present invention has the characteristics that the material casting angle of a screen surface can be changed; obvious complex frequency effect can be generated; screening efficiency is high; high efficiency screen penetration of materials difficultly screened can be realized; the complex frequency excited vibration screen has simple and compact structure, good vibration isolation effect, low cost, small occupied working space, etc. The complex frequency excited vibration screen is suitable for the technical transformation of traditional vibration screens.
Description
Technical field the invention belongs to the material screening Work machine of industries such as metallurgy, building materials, coal, material engineering, fine chemistry industry, is specifically related to a kind of architecture advances of vibratory sieve.
The background technology vibratory sieve has extensive use in the material screening operation of industries such as metallurgy, building materials, coal, material engineering, fine chemistry industry.All there are the low problem of screening efficiency in the linear vibrating screen of present industrial use, circular shale shaker and elliptically vibrating screen, and it is more urgent particularly to improve the requirement of screening efficiency of vibratory sieve for difficult screened material.In order to improve screening efficiency, often on the engineering now adopt probability screen point-score or isopachous sieving, but the shortcoming of these methods is to cause the screen(ing) machine structure complexity, the increase that takes up room, cost are higher more.And, existing various vibratory sieve, because the angle of compass screen surface impelling material is constant substantially in screening material process, it is better to cause compass screen surface only the material of particular category, proportion and granularity to be sieved effect thoroughly, and the material that is unfavorable for other classification, proportion and granularity sieves thoroughly, and the grading effect of screening is poor.
Summary of the invention technical problem to be solved by this invention is to overcome the deficiencies in the prior art, provide a kind of angle of compass screen surface impelling material that can make to change, produce significant multiple effect frequently, the screening efficiency height, can realize that the high efficiency of difficult screened material sieves thoroughly, simple and compact for structure, vibration isolating effect is good, cost is low, takies the little multiple frequency exciting vibratory sieve of working space.
The present invention solves the problems of the technologies described above by the following technical solutions: it comprises screen box, primary vibration exciter, isolation spring and base, screen box is linked on the base by an isolation spring, described primary vibration exciter fixed connection is in the both sides of screen box, and the top center fixed-site of screen box is linked with seconary vibration exciter.
As a further improvement on the present invention, described base connects by two-stage vibration isolation spring and ground.
The corresponding motor speed of described primary vibration exciter and seconary vibration exciter is inequality or identical.
Described primary vibration exciter comprises two vibrating motors that specification is identical, and symmetrical fixed connection is in the both sides of screen box.
Described primary vibration exciter also comprises two eccentric block vibration exciters that specification is identical, and across the both sides of fixed connection in screen box, two eccentric block vibration exciters link to each other with two motors by shaft coupling respectively, and motor is fixedly connected on the motor hold-down support.
A described isolation spring is four groups, is symmetrically fixed on the screen box both sides, and arranges that according to being height before and after the inclination angle of screen box described two-stage vibration isolation spring is four groups with respect to ground, is symmetric arrangement with respect to the central authorities of screen box.
The present invention is except that fixed connection primary vibration exciter on screen box, and also fixed connection has seconary vibration exciter in the top center position of screen box.Primary vibration exciter provides exciting force to drive compass screen surface, makes the vibrating deflection of the each impelling material of compass screen surface keep constant; The seconary vibration exciter that is positioned at the top center position provides exciting force to drive compass screen surface, and the direction of its active force changes in 0 °～360 ° scopes, the making a concerted effort of two groups of exciting forces the vibrating deflection of the each impelling material of compass screen surface is changed, and produces significant multiple effect frequently; Do not need to be equipped with the different compass screen surface in multilayer inclination angle like this and can realize that the high efficiency of difficult screened material sieves thoroughly, and simple and compact for structure, cost is low, it is little to take working space.Base of the present invention connects by two-stage vibration isolation spring and ground, has improved vibration isolating effect.
The present invention also is suitable for traditional vibratory sieve is undergone technological transformation very much, for widely used vibratory sieve on the present engineering, a seconary vibration exciter is installed can be obviously improved the saturating screen capacity of material, and its improvement cost is low, remarkable in economical benefits.
Description of drawings
Fig. 1 is the example structure schematic diagram of vibrating motor for primary vibration exciter of the present invention;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is the example structure schematic diagram of eccentric block vibration exciter for primary vibration exciter of the present invention;
Fig. 4 is the right view of Fig. 3;
Fig. 5 is the force diagram of main and auxiliary vibrator to screen box;
When Fig. 6 is 3 times of primary vibration exciter rotating speed for the rotating speed of seconary vibration exciter, act on the changing condition schematic diagram of making a concerted effort of screen box.
Each label is represented among the figure: 1, screen box, 2, primary vibration exciter, 3, seconary vibration exciter, 4, isolation springs, 5, the two-stage vibration isolation spring, 6, base, 7, motor, 8, shaft coupling, 9, the motor hold-down support.
The specific embodiment as shown in Figure 1, 2, the present invention includes screen box 1, primary vibration exciter 2, an isolation spring 4 and a base 6, screen box 1 is linked on the base 6 by four groups of isolation springs 4, one time isolation spring 4 is symmetrically fixed on screen box 1 both sides, and arranges with respect to being height before and after the inclination angle of ground according to screen box 1; Primary vibration exciter 2 comprises two vibrating motors that specification is identical, and symmetrical fixed connection provides exciting force to drive compass screen surface in the both sides of screen box 1, makes the vibrating deflection of the each impelling material of compass screen surface keep constant; The top center fixed-site of screen box 1 is linked with seconary vibration exciter 3, provides exciting force to drive compass screen surface, and the direction of its active force changes in 0 °～360 ° scopes; The corresponding motor speed of primary vibration exciter 2 and seconary vibration exciter 3 can be inequality, also can be identical.The making a concerted effort of two groups of exciting forces the vibrating deflection of the each impelling material of compass screen surface is changed, produce multiple effect frequently, realize that the high efficiency of difficult screened material is sieved thoroughly.Base 6 connects by four groups of two-stage vibration isolation springs 5 and ground, and with buffering vibration, two-stage vibration isolation spring 5 is symmetric arrangement with respect to the central authorities of screen box 1.
Fig. 3,4 show another embodiment of the present invention, its primary vibration exciter 2 comprises two eccentric block vibration exciters that specification is identical, across the both sides of fixed connection in screen box 1, provide exciting force to drive compass screen surface, two eccentric block vibration exciters link to each other with two motors 7 by shaft coupling 8 respectively, motor 7 is fixedly connected on the motor hold-down support 9, the top center fixed-site of screen box 1 is linked with seconary vibration exciter 3, provide exciting force to drive compass screen surface, the direction of its active force changes in 0 °～360 ° scopes, the corresponding motor speed of primary vibration exciter 2 and seconary vibration exciter 3 can be inequality, also can be identical.The making a concerted effort of two groups of exciting forces the vibrating deflection of the each impelling material of compass screen surface is changed, produce multiple effect frequently, realize that the high efficiency of difficult screened material is sieved thoroughly.Base 6 connects by four groups of two-stage vibration isolation springs 5 and ground, with buffering vibration; Two-stage vibration isolation spring 5 is symmetric arrangement with respect to the central authorities of screen box 1.
The present invention is because seconary vibration exciter 3 is arranged at the top center position of screen box 1, can be effectively and the primary vibration exciter acting in conjunction that is consolidated in screen box 1 both sides, and make its multiple yupin effect remarkable, realize that the high efficiency of difficult screened material is sieved thoroughly.
As shown in Figure 5, the power that seconary vibration exciter 3 is produced is designated as f, and the power that primary vibration exciter 2 is produced is designated as F
0The comprehensive function of primary vibration exciter 2 and 3 pairs of screen boxs 1 of seconary vibration exciter can be reduced to make a concerted effort a F and resultant moment M with respect to screen box 1 barycenter O.
Vibrating deflection when the effect of resultant moment M will change screen box 1 compass screen surface impelling material.Because the exciting force of seconary vibration exciter 3 is less with respect to the moment of screen box 1 barycenter O than the exciting force of primary vibration exciter 2 with respect to the moment of screen box 1 barycenter O, the angular range that its moment changes screen box 1 compass screen surface vibrating deflection is about-10 °～10 °.And the big young pathbreaker of the F that makes a concerted effort determines the amount of force of screen box 1 compass screen surface impelling material, thereby determines materials casting distance by distance on compass screen surface; Vibrating deflection when the direction of F will directly influence screen box 1 compass screen surface impelling material with joint efforts.The angular range that auxiliary exciting force causes resultant direction to change also is about-10 °～10 °.The influence of comprehensive 3 pairs of screen cloth vibrating deflections of seconary vibration exciter, the vibrating deflection excursion that material on the seconary vibration exciter 3 back screen box screen clothes is installed is about 25 °～65 °.(generally, when this seconary vibration exciter 3 not being installed, the vibrating deflection of material is about 45 °.)
When the rotating speed that Fig. 6 shows seconary vibration exciter 3 is 3 times of primary vibration exciter 2 rotating speeds, the situation that size of making a concerted effort and direction cause compass screen surface vibrating deflection and impelling distance to change.When Complex-frequency Vibrating Screen of the present invention is worked, the active force of primary vibration exciter 2 and seconary vibration exciter 3 constantly rotates variation according to rotating speed separately in 0 °～360 ° scopes, but instantaneous at screen box 1 compass screen surface impelling material has deterministic relation between the force direction of primary vibration exciter 2 and seconary vibration exciter 3.According to vibrating machine motor synchronizing The Characteristic Study result, when the rotating speed of seconary vibration exciter 3 is 3 times of rotating speed of primary vibration exciter 2, the exciting force F of the exciting force of seconary vibration exciter 3 and primary vibration exciter 2 during the impelling material
0Contingent active force compound mode has three kinds, and (exciting force of seconary vibration exciter 3 under three kinds of compound modes is designated as f respectively
1, f
2, f
3): (1) F
0With f
1Combination (f
1With F
0Both directions overlap); (2) F
0With f
2Combination (f
2With f
1Angle be 120 °); (3) F
0With f
3Combination (f
3With f
2Angle be 120 °).When seconary vibration exciter 3 not being installed, has only main exciting force F
0Effect, the materials casting track is OA
0Under first kind of compound mode, F
0With f
1Make a concerted effort to be F
1, the materials casting track is OA
1Under second kind of compound mode, F
0With f
2Make a concerted effort to be F
2, the materials casting track is OA
2Under the third compound mode, F
0With f
3Make a concerted effort to be F
3, the materials casting track is OA
3During Complex-frequency Vibrating Screen work, these three kinds of compound modes periodically produce the impelling effect to material, i.e. make a concerted effort to be F1 during impelling for the first time, make a concerted effort to be F2 during impelling for the second time, making a concerted effort during impelling for the third time for F3, is again F1 with joint efforts during the 4th impelling ...., per three times is one-period.As can be seen, behind the employing seconary vibration exciter 3, because materials casting angle and cast periodically change, the probability distribution of the saturating sieve of material also will change on the compass screen surface.Than the vibratory sieve that has only primary vibration exciter 2 effect, originally the material that can not sieve thoroughly under fixing vibrating deflection duty may sieve under new vibrating deflection duty thoroughly, thereby help improving the saturating sieve effect of difficult screened material.In actual applications, can also change the speed ratio relation of seconary vibration exciter 3 and primary vibration exciter 2 according to actual needs, adjust the compound mode at materials casting angle.
Claims (6)
1, a kind of multiple sieve of excited vibration frequently, comprise screen box (1), primary vibration exciter (2), an isolation spring (4) and base (6), screen box (1) is linked on the base (6) by an isolation spring (4), it is characterized in that described primary vibration exciter (2) fixed connection in the both sides of screen box (1), the top center fixed-site of screen box (1) is linked with seconary vibration exciter (3).
2, the multiple sieve of excited vibration frequently according to claim 1 is characterized in that described base (6) connects by two-stage vibration isolation spring (5) and ground.
3, the multiple sieve of excited vibration frequently according to claim 1 and 2 is characterized in that described primary vibration exciter (2) comprises two vibrating motors that specification is identical, and symmetrical fixed connection is in the both sides of screen box (1).
4, the multiple sieve of excited vibration frequently according to claim 1 and 2, it is characterized in that described primary vibration exciter (2) comprises two eccentric block vibration exciters that specification is identical, across the both sides of fixed connection in screen box (1), two eccentric block vibration exciters link to each other with two motors (7) by shaft coupling (8) respectively, and motor (7) is fixedly connected on the motor hold-down support (9).
5, the multiple sieve of excited vibration frequently according to claim 3, it is characterized in that a described isolation spring (4) is four groups, be symmetrically fixed on screen box (1) both sides, and with respect to being the height layout before and after the inclination angle of ground according to screen box (1), described two-stage vibration isolation spring (5) is four groups, is symmetric arrangement with respect to the central authorities of screen box (1).
6, the multiple sieve of excited vibration frequently according to claim 4, it is characterized in that a described isolation spring (4) is four groups, be symmetrically fixed on screen box (1) both sides, and with respect to being the height layout before and after the inclination angle of ground according to screen box (1), described two-stage vibration isolation spring (5) is four groups, is symmetric arrangement with respect to the central authorities of screen box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03124558 CN1201873C (en) | 2003-06-18 | 2003-06-18 | Vibrating screen actuated by dual frequencies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03124558 CN1201873C (en) | 2003-06-18 | 2003-06-18 | Vibrating screen actuated by dual frequencies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1462655A CN1462655A (en) | 2003-12-24 |
| CN1201873C true CN1201873C (en) | 2005-05-18 |
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ID=29748378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03124558 Expired - Fee Related CN1201873C (en) | 2003-06-18 | 2003-06-18 | Vibrating screen actuated by dual frequencies |
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| Country | Link |
|---|---|
| CN (1) | CN1201873C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091690B (en) * | 2010-10-30 | 2013-10-30 | 中国矿业大学 | Four-shaft forced synchronization variable linear uniform-thickness vibrating screen and screening method thereof |
| CN103831233A (en) * | 2014-03-10 | 2014-06-04 | 山东大通机械科技有限公司 | High-efficiency energy-saving circular vibrating screen classifier |
| CN115780242B (en) * | 2022-12-08 | 2023-08-04 | 中国矿业大学(北京) | Combined multidimensional movement relaxation sieve |
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2003
- 2003-06-18 CN CN 03124558 patent/CN1201873C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1462655A (en) | 2003-12-24 |
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