CN204564541U - One straightens line tracking equal thick screen - Google Patents
One straightens line tracking equal thick screen Download PDFInfo
- Publication number
- CN204564541U CN204564541U CN201520087132.2U CN201520087132U CN204564541U CN 204564541 U CN204564541 U CN 204564541U CN 201520087132 U CN201520087132 U CN 201520087132U CN 204564541 U CN204564541 U CN 204564541U
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- China
- Prior art keywords
- spring
- sieve plate
- upper bracket
- screen
- support
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Abstract
One straightens line tracking equal thick screen, cover plate (2) is connected with the sieve plate (1) on its both sides by bolt, screen cloth (6) is bolted with the sieve plate (1) on its both sides, upper bracket (13), upper bracket (14) and sieve plate (1) link together, front bearing (4) and rear support (5) composition elastic support, bearing is installed in the horizontal plane, wherein upper bracket (13) and front bearing (4) are coupled together by spring guide (9) by spring (11), upper bracket (14) and rear support (5) are coupled together by spring guide (10) by spring (12), stay pipe (7) is by linking together with sieve plate (1), excitor is made up of two identical vibrating motors (3) being symmetrically distributed in stay pipe (7) two ends, the stiffness K of spring (11)
1with the stiffness K being greater than spring (12)
2.
Description
Technical field
The utility model relates to vibratory sieve, be particularly applied to the field such as colliery, metallurgy to material carry out classification, de-mediated straighten line tracking equal-thickness vibrating screen.
Background technology
In order to improve screening efficiency, French scientist Burstlein proposes the method for screening with constant bed thickness, and vibratory sieve has different technological parameters along screening length, makes fine fraction flow substantial equalization, along screen length direction bed of material uniform thickness or increase progressively.Screening with constant bed thickness has the following advantages: have reasonable thickness of feed layer, quick flowing that segmentation adopts rational scatter radius, material makes compass screen surface be purified.For making vibratory sieve have good screening effect, usually take two schemes, one adopts remedial measures to existing vibratory sieve, picture multiple spot feed-type, but the method practical operation trouble, control the inconvenience of different grain size distribution material, bad adaptability, another kind is the screening plant adopting new construction, as Double-frequency vibrating screen and equal thick screen, can Double-frequency vibrating screen actuated element many, complex structure, use debugging trouble, oscillation intensity is excessive, and equal thick screen height is large, take larger space.So propose transforming existing equipment, at present conventional a kind of be the position suitably adjusting the vibrating motor centre of gyration and barycenter, change the track of compass screen surface, realize raising screening efficiency.This kind of method difficulty in the transformation of actual factory is comparatively large, and adjustment motor position can affect the bulk strength of sieve nest.
Summary of the invention
The purpose of this utility model is to provide one and straightens line tracking equal thick screen.
The utility model is that one straightens line tracking equal thick screen, sieve plate 1, the screen box that cover plate 2 and screen cloth 6 form, cover plate 2 is connected with the sieve plate 1 on its both sides by bolt, screen cloth 6 is bolted with the sieve plate 1 on its both sides, first upper bracket 13, second upper bracket 14 links together with sieve plate 1, front bearing 4 and rear support 5 form elastic support, bearing is installed in the horizontal plane, wherein the first upper bracket 13 is coupled together with front bearing 4 by the first spring guide 9 by the first spring 11, second upper bracket 14 is coupled together with rear support 5 by the second spring guide 10 by the second spring 12, stay pipe 7 is by linking together with sieve plate 1, excitor is made up of two identical vibrating motors 3 being symmetrically distributed in stay pipe 7 two ends, wherein two vibrating motors are connected with motor gasket 8 by bolt, motor gasket 8 is connected with sieve plate 1, the stiffness K of the first spring 11
1with the stiffness K being greater than the second spring 12
2.
The utility model changes the feature of traditional translation straight line compass screen surface each point orbiting motion model identical, has drawn the change track equal-thickness vibrating screen meeting compass screen surface movement characteristic according to the principle of screening with constant bed thickness.Vibratory sieve feeding end vibration inclination angle is large, and throwing index is high, makes the ability of this vibratory sieve feeding end convey materials stronger, can make feeding end size distribution more widely material have enough energy to travel forward, be conducive to even laminating, it is large that material sieves probability thoroughly; Known as calculated, along on screen length direction, from feeding end to discharge end, material movement speed is decrement states, and the vibration inclination angle of compass screen surface each point is also diminished gradually by high inclination-angle.Can ensure that compass screen surface has rational thickness of feed layer, give full play to the saturating sieve potentiality of material; The throwing index of vibratory sieve is larger, approximately 20% is improve relative to the throwing index of the vibratory sieve translation vibratory sieve of same specification, the effective layering of material that this section thicker can be made, reduce gradually from feeding end to discharge end throwing index, thus ensure that each section of sieve nest has rational throwing index, enhance screening effect.Owing to having larger throwing index and high stream speed at feeding end, make bulk materials quickly through and the fast hierarchical of material, make tiny particle arrive compass screen surface faster, be beneficial to screening.Interlude has throwing index and the stream speed of common vibratory sieve, and make along on compass screen surface direction, material is roughly stable, and tiny material can sieve uniformly thoroughly.Throwing index close to exhaust end is slightly lower than the index of common screening machine with stream speed.Residence time of material is long, fully thoroughly sieve.Therefore the screening efficiency that line tracking equal-thickness vibrating screen effectively raises vibratory sieve is straightened.
Accompanying drawing explanation
The schematic diagram of Fig. 1 main TV structure of the present utility model, Fig. 2 is the schematic diagram of left TV structure, and Fig. 3 is screen box mechanical model schematic diagram, and Fig. 4 is kinematic parameter figure, Fig. 5 is material speed figure.
Detailed description of the invention
Below in conjunction with the example in accompanying drawing, the invention will be further described:,
Shown in Fig. 1, Fig. 2, the utility model straightens line tracking equal thick screen, mainly contains screen box, elastic support, excitor, motor gasket composition.Screen box is by sieve plate 1, cover plate 2 and screen cloth 6 form, cover plate 2 is connected with the sieve plate 1 on its both sides by bolt, screen cloth 6 is also bolted with the sieve plate 1 on its both sides, elastic support is made up of front bearing 4 and rear support 5, bearing is installed in the horizontal plane, front bearing 4 is provided with spring 11, spring guide 9 and upper bracket 13, wherein upper bracket 13 is welded on sieve plate 1, spring 11 is coupled together front bearing 4 and upper bracket 13 by spring guide 9, rear support 5 is provided with spring 12, spring guide 10 and upper bracket 14, wherein upper bracket 14 is welded on sieve plate, same spring 12 is coupled together rear support 5 and upper bracket 14 by spring guide, stay pipe 7 is linked together by welding and sieve plate 1, excitor is made up of two identical vibrating motors 3 being symmetrically distributed in stay pipe 7 two ends, wherein two vibrating motors are connected with motor gasket 8 by bolt.Motor gasket 8 is also connected with sieve plate 1 by bolt.Wherein on front and back support, spring rate is different, and namely the rigidity of the ratio of rigidity spring 12 of spring 11 is large.Vibratory sieve is integrally realized vibrating by vibrating motor and its.
According to above-described change track equal thick screen, as shown in Figure 3, the stiffness K of the first spring 11
1with the stiffness K of the second spring 12
2relation determined by following formula:
Wherein:
，
，
In formula: σ is operating frequency and intrinsic frequency ratio,
M, m
1, m
2vibratory sieve quality, two eccentric block qualities, and m
1=m
2=m(kg);
The displacement (m) in x, y-x, y direction; The speed (m/s) in x', y'-x, y direction;
The acceleration (m/s2) in x ", y "-x, y direction;
β-exciting force position and horizontal plane angle (°);
θ
1the position, angle (rad) of-swing;
K
y1, k
y2---support spring is in the rigidity (N/m) in discharge end and feeding end y direction;
K
x1, k
x2-support spring is in the rigidity (N/m) of front and back bearing in x direction;
k
x=k
x1+k
x2；k
y=k
y1+k
y2；
A
o-amplitude of exciting force, A
o=me ω
2(N), e-eccentricity (m), ω-exciting angular frequency (rad/s);
L
1-discharge end support spring is from the horizontal range (m) of barycenter;
L
2-feed end support spring is from the horizontal range (m) of barycenter;
L
oy-support spring is to the vertical range (m) of barycenter.
As shown in Fig. 3, O is the barycenter of screen box, M mass of vibration, J, J
1, J
2for M, m
1, m
2to the rotary inertia of barycenter O, A
ofor exciting force amplitude, K
1for the rigidity of front seat supports spring, K
2for the rigidity of rear support support spring, l
1for front bearing support spring is from the horizontal range of barycenter, l
2for rear support support spring is from the horizontal range (m) of barycenter, l
oyfor support spring is to the vertical range (m) of barycenter.β is exciting force position and horizontal plane angle, 5 the special points chosen on compass screen surface from feeding end to discharge end.
As shown in Figure 3, any point on screen box can be obtained by the kinematics analysis of vibratory sieve
, when the center-of-mass coordinate of vibratory sieve is (x, y), on sieve nest, the equation of motion of any point is:
(2)
On compass screen surface, the rate equation of any point is:
，
(3)
Any point movement locus is in the Y direction sine curve, and amplitude is
, Y is negative value, if θ 1 be on the occasion of,
Known from feeding end to discharge end, each point abscissa increases progressively, and so in Y-direction, amplitude is successively decreased gradually, and throwing index also successively decreases gradually, and on compass screen surface, the movement locus of each point is different.
Therefore by changing the rigidity of front and back support spring, can realize each point on compass screen surface is different movement locus, therefore reaches rational migration velocity and throwing intensity, improves screening efficiency.
Such as: selected parameter: M=720.78 kg, m
1=m
2=m=82kg, ω=105 rad/s; l
1=1063mm l
2=937mm, l
oy=82.3, A
o=1*104 N, when getting 2,4.65 respectively to σ, namely meets the requirements, can be calculated X=-2.18*10-3, Y=-1.27*10-3, θ
1=5.5*10-4.
Therefore by the rigidity of support spring before and after adjustment, the movement locus of each point that just can realize on compass screen surface straightens line, reaches rational material speed and throwing intensity thus, improves screening efficiency.Choose 5 special points along compass screen surface direction, choose design parameter as above, to draw on compass screen surface the motion conditions of each point from feeding end to discharge end compass screen surface, the kinematic parameter of each point and material speed are as shown in Figure 4,5.
Vibrating shaft of the present invention is twin shaft, and motor adopts vibrating motor, and vibrating motor is made up of upper and lower two pieces of identical eccentric blocks and ten thousand shaft couplings, and the symmetrical vibrating motor in two ends makes to cancel out each other along the component of stay pipe, only produce along screen box barycenter with joint efforts.Because vibrating motor is directly connected with screen box, the transmission of power is directly by side plate, and stress condition is more favourable.
Claims (2)
1. one kind straightens line tracking equal thick screen, sieve plate (1), the screen box that cover plate (2) and screen cloth (6) form, it is characterized in that: cover plate (2) is connected with the sieve plate (1) on its both sides by bolt, screen cloth (6) is bolted with the sieve plate (1) on its both sides, first upper bracket (13), second upper bracket (14) and sieve plate (1) link together, front bearing (4) and rear support (5) composition elastic support, bearing is installed in the horizontal plane, wherein the first upper bracket (13) and front bearing (4) are coupled together by the first spring guide (9) by the first spring (11), second upper bracket (14) and rear support (5) are coupled together by the second spring guide (10) by the second spring (12), stay pipe (7) is by linking together with sieve plate (1), excitor is made up of two identical vibrating motors (3) being symmetrically distributed in stay pipe (7) two ends, wherein two vibrating motors are connected with motor gasket (8) by bolt, motor gasket (8) is connected with sieve plate (1), the stiffness K of the first spring (11)
1with the stiffness K being greater than the second spring (12)
2.
2. according to claims 1, straighten line tracking equal thick screen, it is characterized in that: the stiffness K of the first spring (11)
1with the stiffness K of the second spring (12)
2relation determined by following formula:
Wherein:
，
，
In formula: σ is operating frequency and intrinsic frequency ratio,
M, m
1, m
2vibratory sieve quality, two eccentric block qualities, and m
1=m
2=m(kg);
J, J1, J2 are M, m1, m2 rotary inertia to barycenter (O);
The displacement (m) in x, y-x, y direction;
β-exciting force position and horizontal plane angle (°);
θ
1the position, angle (rad) of-swing;
K
y1, k
y2---support spring is in the rigidity (N/m) in discharge end and feeding end y direction;
K
x1, k
x2-support spring is in the rigidity (N/m) of front and back bearing in x direction;
k
x=k
x1+k
x2；k
y=k
y1+k
y2；
A
o-amplitude of exciting force, A
o=me ω
2(N), e-eccentricity (m), ω-exciting angular frequency (rad/s);
L
1-discharge end support spring is from the horizontal range (m) of barycenter;
L
2-feed end support spring is from the horizontal range (m) of barycenter;
L
oy-support spring is to the vertical range (m) of barycenter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520087132.2U CN204564541U (en) | 2015-02-09 | 2015-02-09 | One straightens line tracking equal thick screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520087132.2U CN204564541U (en) | 2015-02-09 | 2015-02-09 | One straightens line tracking equal thick screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204564541U true CN204564541U (en) | 2015-08-19 |
Family
ID=53857234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520087132.2U Expired - Fee Related CN204564541U (en) | 2015-02-09 | 2015-02-09 | One straightens line tracking equal thick screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204564541U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110074676A (en) * | 2019-03-27 | 2019-08-02 | 童·林约翰 | Powder Yao Jun mechanism, coffee automatic coffee making device and method for pouring using it |
-
2015
- 2015-02-09 CN CN201520087132.2U patent/CN204564541U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110074676A (en) * | 2019-03-27 | 2019-08-02 | 童·林约翰 | Powder Yao Jun mechanism, coffee automatic coffee making device and method for pouring using it |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160209 |