CN108188013B - A vibrating screen with multiple vibration trajectories - Google Patents

Abstract

The invention relates to the field of grading and screening equipment, in particular to a vibrating screen with multiple vibration trajectories. It includes a top frame, a bottom frame and a screen box. On the opposite sides of the top frame and the bottom frame and at the two ends of the screen box, there are respectively provided with first sliding rods, and the first sliding rods are slidingly provided with first sliding bars. The sliders are connected by a second slider between the two first sliders on the top frame and the bottom frame at the same end of the screen box, and the second sliders are respectively slid on the two second sliders. The two ends of the box are fixedly connected with the two second sliders; the screen box is provided with a partition that divides the inner cavity of the screen box into upper and lower chambers, and an excitation device is provided in the lower chamber of the screen box. A sieve plate is arranged in the upper chamber of the sieve box. The invention has multiple vibration trajectories, and is convenient to control and adjust in multiple vibration trajectories to adapt to screening production.

Description

A vibrating screen with multiple vibration trajectories

technical field

The invention relates to the field of grading and screening equipment, in particular to a vibrating screen with multiple vibration trajectories.

Background technique

The vibrating screen works by using the reciprocating rotary vibration generated by the vibration of the vibrator, and the vibrator can generate a periodically changing exciting force, which is an important core component for the vibrating screen to realize its function.

At present, most of the exciters commonly used are in a single motion mode, that is, linear, circular, and elliptical motion modes. As people's requirements for productivity increase day by day, a single-mode vibrator can no longer meet production requirements.

Contents of the invention

The present invention aims to provide a vibrating screen with multiple vibration tracks, which is convenient to control and adjust in multiple vibration tracks to adapt to screening production.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a vibrating screen with multiple vibration trajectories, including a top frame, a bottom frame and a screen box arranged between the top frame and the bottom frame. On the opposite surfaces of the top frame and the bottom frame and located at both ends of the screen box, first slide bars are respectively provided, and first sliders are provided on the first slide bars, and the top frame and the bottom at the same end of the screen box The two first sliders on the frame are connected by a second slider, and the second sliders are respectively slid on the two second sliders, and the first slider and the top machine are located on the first slider. The first springs are sleeved between the racks, and the second springs are respectively sleeved between the second slider and the first slider on the second slide bar. The two ends of the screen box are respectively connected to the two second The slider is fixedly connected; the screen box is provided with a partition that divides the inner cavity of the screen box into upper and lower chambers, and a vibration excitation device is provided in the lower chamber of the screen box. The vibration excitation device includes parallel active The shaft and the driven shaft are respectively fixed with the same first eccentric block on the driving shaft and the driven shaft, and the rotatable second eccentric block is set on the driven shaft; The clutch mechanism includes two identical first gears fixedly arranged on the driving shaft at intervals, a dual gear that is slidably arranged on the driven shaft through a spline structure, a second gear fixedly connected with the second eccentric block, and A shift fork used to move the dual gear to slide on the driven shaft. The dual gear includes a first dual sub-gear and a second dual sub-gear, wherein the first dual sub-gear can be connected with the two first gears When the first double sub-gear is meshed with one of the first gears, the second double sub-gear can be meshed with the second gear; a sieve plate is arranged in the upper chamber of the screen box.

Preferably, support bases for fixing both ends of the first slide bar are respectively provided on the top frame and the bottom frame; one end of the first spring is fixedly connected to the first slide block, and the other end is connected to the support on the corresponding side. The seat is fixedly connected.

Preferably, the first sliding bar is arranged along the horizontal direction, and the second sliding bar is arranged along the vertical direction.

Preferably, the sieve plate is arranged obliquely, and the angle between the sieve plate and the horizontal plane is 10-25°; the partition plate is arranged parallel to the sieve plate.

Preferably, the first gear, the first double sub-gear and the second double sub-gear are all external gears, and the second gear is an internal gear.

Preferably, the middle part of the dual gear is provided with a groove for matching with a shift fork along the circumferential direction.

Preferably, a handle is fixed on the shift fork, and the end of the handle away from the shift fork is arranged outside the screen box through a strip-shaped hole opened on the screen box.

Preferably, one end of the driving shaft is arranged outside the screen box and is connected with a pulley.

Preferably, the second eccentric mass is connected to the driven shaft through a rolling bearing, the inner ring of the rolling bearing is fixed to the driven shaft, and the outer ring is fixed to the second eccentric mass.

Preferably, both the first eccentric mass and the second eccentric mass are semicircular.

Beneficial effect

The invention has simple structure, easy realization and convenient operation. In the vibration device, the driving shaft can be controlled to rotate independently through the clutch mechanism, and the circular track vibration can be realized through the centrifugal force generated by the first eccentric mass on the driving shaft; the driving shaft and the driven shaft can be controlled to rotate together and the second The gear is idling, which can realize the vibration of the straight track; through the clutch mechanism to control the driving shaft and the driven shaft to rotate together and connect the second gear on the driven shaft with the driving shaft, two identical first eccentric blocks and one eccentric The vibration of the block produces an elliptical trajectory, so that the vibration excitation device drives the screen box of the present invention to perform linear reciprocating, circular reciprocating or elliptical reciprocating vibration, which integrates the advantages of multiple vibration trajectory modes, improves production efficiency, and reduces Cost of production. The clutch mechanism is realized by a simple shift fork, which is convenient and simple to operate and easy to popularize.

During work, such as coal mining, when sieving ore, irregular objects are stuck on the screen during vibration, which affects production efficiency. At this time, the variable trajectory exciter can be used to change the trajectory to shake the objects off. Without manual participation, the safety factor is improved. The mass of the eccentric mass of the exciter designed this time is variable, and different masses of the eccentric mass can be obtained, and different excitation forces can be obtained, thereby changing the amplitude. The utilization efficiency of the exciter is improved.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is the left view structural representation of the present invention;

Fig. 3 is the top view sectional structure schematic diagram of screen box part in Fig. 1;

Marks in the figure: 1. Bottom frame, 2. Screen box, 3. Second slider, 4. Second spring, 5. Second slider, 6. First slider, 7. Support base, 8. Top Frame, 9, sieve plate, 10, dividing plate, 11, the first spring, 12, the first slide block, 13, the first eccentric block, 14, the first gear, 15, driving shaft, 16, belt pulley, 17, Rolling bearing, 18, the second eccentric block, 19, the second gear, 20, the bar hole, 21, the handle, 22, the second double sub-gear, 23, the first double sub-gear, 24, shift fork, 25, driven shaft.

Detailed ways

As shown in Fig. 1 to Fig. 3, a vibrating screen with multiple vibration trajectories of the present invention includes a top frame 8, a bottom frame 1 and a screen box arranged between the top frame 8 and the bottom frame 1 2. Both the top frame 8 and the bottom frame 1 are fixedly connected with other auxiliary bases, and the screen box 2 is movably connected between the top frame 8 and the bottom frame 1, and can be excited by the Under the action of the device, it vibrates along three vibration trajectories: straight line, circle and ellipse, so as to complete the screening operation.

On the bottom surface of the top frame 8 toward the bottom frame 1, the two ends of the screen box 2 are respectively provided with first slide bars 6 parallel to each other, and the top surface of the bottom frame 1 toward the top frame 8 is located at the bottom of the screen box 2. Both ends are respectively provided with the first sliding bar 6 parallel to each other, and the first slider 12 is slidably arranged on the four first sliding bars 6, and the top frame 8 and the bottom frame 1 on the same end of the screen box 2 are positioned at the two ends. The two first sliders 12 are connected by the second slider 5, and the second slider 3 is respectively slid on the two second sliders 5, and the first slider 12 and the top are located on the first slider 6. The first springs 11 are respectively sleeved between the frame 8, the second springs 4 are respectively sleeved between the second slider 3 and the first slider 12 on the second slide bar 5, and the two ends of the screen box 2 They are respectively fixedly connected with two second sliders 3 . Four first slide bars 6 wherein are all arranged along the horizontal direction, and two second slide bars 5 are all arranged along the vertical direction, through the first slide bar 6, the first slide block 12, the second slide bar 5 and the second The cooperation of the slide block 3 can make the screen box 2 move horizontally and vertically relative to the top frame 8 and the bottom frame 1 . In this embodiment, the top frame 8 and the bottom frame 1 are respectively provided with support seats 7 for fixing the two ends of the first slide bar 6; one end of the first spring 11 is fixedly connected with the first slider 12, and the other end is connected with the corresponding Side support seat 7 is fixedly connected. Both the first spring 11 and the second spring 4 are in a compressed state, which can avoid the hard impact of the first slider 12 and the second slider 3, and can also store elastic potential energy during the vibration process, so that the amplitude of the vibration decreases during the vibration process. The frequency increases, which is beneficial to the classification and screening of ore or other materials.

The screen box 2 is provided with a partition 10 that divides the inner cavity of the screen box 2 into upper and lower chambers. The angle between the partition 10 and the horizontal plane is 10-25°. The sieve plate 9 arranged parallel to the partition 10 has a plurality of sieve holes spaced apart on the sieve plate 9, and a feed inlet is provided on the top of the screen box 2, and the screen box 2 is located at the lower end of the sieve plate 9 and the lower end of the partition 10. There are outlets on one side respectively. After the material enters the sieve box 2 from the feeding device set on the top frame 8, under the continuous vibration of the sieve box 2, the bulk material stays on the drying plate and passes from the sieve box 2 located at the lower end of the sieve plate 9. The discharge port is discharged, and the small pieces of material falling from the sieve hole are discharged through the discharge port located at the lower end of the partition 10 facing upward.

The vibration of the screen box 2 of the present invention is realized by an excitation device arranged in the lower chamber of the screen box 2 . The excitation device includes a driving shaft 15 and a driven shaft 25 which are parallel to each other and arranged horizontally. One end of the driving shaft 15 is arranged outside the screen box 2 and a belt pulley 16 is installed, which can pass through the motor fixed on the screen box 2. The pulley mechanism drives the drive shaft 15 to rotate.

The driving shaft 15 and the driven shaft 25 are respectively fixed with the same and semicircular first eccentric block 13, and the driven shaft 25 is provided with a rotatable and semicircular second eccentric block 18, The second eccentric block 18 is connected to the driven shaft 25 through a rolling bearing 17 , the inner ring of the rolling bearing 17 is fixed to the driven shaft 25 , and the outer ring is fixed to the second eccentric block 18 . When the driving shaft 15 rotates alone, the centrifugal force generated by the first eccentric block 13 on the driving shaft 15 can drive the screen box 2 to vibrate in a circular track; the driving shaft 15 and the driven shaft 25 rotate simultaneously, and the driven shaft 25 When the second eccentric block 18 on the top is not rotating, the resultant force of the centrifugal force generated by the two first eccentric blocks 13 can drive the screen box 2 to vibrate in a straight line track; the driving shaft 15 and the driven shaft 25 rotate simultaneously, and the driven shaft 15 When the second eccentric block 18 on the shaft 25 rotates coaxially with the driven shaft 25, the resultant centrifugal force of the two first eccentric blocks 13 and one second eccentric block 18 can drive the screen box 2 to vibrate on an elliptical track.

In the present invention, the rotation of the first eccentric mass 13 and the second eccentric mass 18 on the driven shaft 25 is controlled by the clutch mechanism arranged between the driving shaft 15 and the driven shaft 25 . The clutch mechanism includes two identical first gears 14 fixedly arranged on the driving shaft 15 at intervals, a dual gear slidably arranged on the driven shaft 25 through a spline structure, and a second gear fixedly connected to the second eccentric block 18 19 and the shift fork 24 used to move the dual gear to slide on the driven shaft 25, the dual gear includes the first dual sub-gear 23 and the second dual sub-gear 22, the first dual sub-gear 23 wherein It can be engaged with the two first gears 14 respectively, and when the first dual sub-gear 23 is engaged with one of the first gears 14 , the second dual sub-gear 22 can be engaged with the second gear 19 . The first gear 14 , the first double sub-gear 23 and the second double sub-gear 22 are all external gears, and the second gear 19 is an internal gear. The middle part of the duplex gear is provided with a groove for cooperating with the shift fork 24 along the circumferential direction. A handle 21 is fixed on the shift fork 24, and one end of the handle 21 away from the shift fork 24 is arranged outside the screen box 2 through the strip-shaped hole 20 provided on the screen box 2, which is convenient for the operator to control the vibration trajectory of the present invention.

In the vibration process of the straight track, the first double sub-gear 23 is meshed with the first gear 14 on the right side in Fig. Separation, the driving shaft 15 drives the driven shaft 25 to rotate, and the centrifugal force generated by the two first eccentric blocks 13 generates a resultant force during the rotation to drive the screen box 2 to vibrate along a straight track.

During the vibration process of the circular track, the first double sub-gear 23 is neither meshed with the first gear 14 nor meshed with the second gear 19 through the shift fork 24. At this time, only the driving shaft 15 rotates, and the driving The centrifugal force generated by the first eccentric mass 13 on the shaft 15 drives the screen box 2 to vibrate along a circular track.

During the vibration process of the elliptical track, the first dual sub-gear 23 meshes with the first gear 14 on the left side in FIG. , at this time, the driving shaft 15 drives the driven shaft 25 to rotate, and two first eccentric blocks 13 and a second eccentric block 18 all generate centrifugal force, because the centrifugal force generated on the driven shaft 25 is greater than the driving shaft 15, therefore, that is The screen box 2 can be driven to vibrate along an elliptical track by connecting a first eccentric block 13 and a second eccentric block 18 .

Claims (8)

1. A vibrating screen having a plurality of vibration trajectories, characterized in that: including top frame (8), bottom frame (1) and set up sieve case (2) between top frame (8) and bottom frame (1), and be located on the opposite face of top frame (8) and bottom frame (1) and be equipped with first slide bar (6) respectively at the both ends of sieve case (2), all slide on first slide bar (6) and be equipped with first slider (12), be located between two first sliders (12) on top frame (8) and bottom frame (1) of sieve case (2) same end and be connected through second slide bar (5), slide respectively on two second slide bars (5) and be equipped with second slider (3), be located respectively between first slider (12) and top frame (8) on first slide bar (6) and overlap respectively and be equipped with first spring (11), be located between second slider (3) and first slider (12) on second slide bar (5) respectively be equipped with second spring (4), the both ends of sieve case (2) respectively with two second slider (3) fixed connection, through first slider (6), first slider (12), the second slide bar (5) and the second slide block (3) are matched to enable the screen box (2) to move horizontally and vertically relative to the top frame (8) and the bottom frame (1); the screen box (2) is internally provided with a baffle plate (10) for dividing the inner cavity of the screen box (2) into an upper cavity and a lower cavity, the lower cavity of the screen box (2) is internally provided with an excitation device, the screen box (2) can be driven to perform reciprocating vibration of a linear track, a circular track or an elliptical track through the excitation device, the excitation device comprises a driving shaft (15) and a driven shaft (25) which are parallel to each other, the driving shaft (15) and the driven shaft (25) are respectively fixedly provided with the same first eccentric block (13), and the driven shaft (25) is provided with a rotatable second eccentric block (18); a clutch mechanism is arranged between the driving shaft (15) and the driven shaft (25), the clutch mechanism comprises two identical first gears (14) fixedly arranged on the driving shaft (15) at intervals, a duplex gear arranged on the driven shaft (25) in a sliding manner through a spline structure, a second gear (19) fixedly connected with a second eccentric block (18) and a shifting fork (24) for shifting the duplex gear to slide on the driven shaft (25), the duplex gear comprises a first duplex sub-gear (23) and a second duplex sub-gear (22), the first duplex sub-gear (23) can be respectively connected with the two first gears (14) in a meshing manner, and when the first duplex sub-gear (23) is connected with one of the first gears (14) in a meshing manner, the second duplex sub-gear (22) can be connected with the second gear (19) in a meshing manner; a sieve plate (9) is arranged in the upper chamber of the sieve box (2);

in the reciprocating vibration of the circular track, the shifting fork (24) is used for enabling the first duplex sub-gear (23) to be meshed with neither the first gear (14) nor the second gear (19);

the sieve plate (9) is obliquely arranged, and the included angle between the sieve plate (9) and the horizontal plane is 10-25 degrees; the baffle plate (10) is arranged parallel to the screen plate (9);

the first eccentric block (13) and the second eccentric block (18) are semicircular.

2. A vibrating screen having a plurality of vibration trajectories according to claim 1, wherein: supporting seats (7) for fixing two ends of the first sliding rod (6) are respectively arranged on the top frame (8) and the bottom frame (1); one end of the first spring (11) is fixedly connected with the first sliding block (12), and the other end of the first spring is fixedly connected with the supporting seat (7) at the corresponding side.

3. A vibrating screen having a plurality of vibration trajectories according to claim 1, wherein: the first sliding rod (6) is arranged along the horizontal direction, and the second sliding rod (5) is arranged along the vertical direction.

4. A vibrating screen having a plurality of vibration trajectories according to claim 1, wherein: the first gear (14), the first duplex sub-gear (23) and the second duplex sub-gear (22) are all external gears, and the second gear (19) is an internal gear.

5. A vibrating screen having a plurality of vibration trajectories according to claim 1, wherein: the middle part of duplex gear is equipped with along circumference and is used for with shift fork (24) complex recess.

6. A vibrating screen having a plurality of vibration trajectories according to claim 1, wherein: the shifting fork (24) is fixedly provided with a handle (21), and one end, far away from the shifting fork (24), of the handle (21) is arranged outside the screen box (2) through a strip-shaped hole (20) formed in the screen box (2).

7. A vibrating screen having a plurality of vibration trajectories according to claim 1, wherein: one end of the driving shaft (15) is arranged outside the screen box (2) and is connected with a belt pulley (16).

8. A vibrating screen having a plurality of vibration trajectories according to claim 1, wherein: the second eccentric block (18) is connected with the driven shaft (25) through a rolling bearing (17), the inner ring of the rolling bearing (17) is fixed with the driven shaft (25), and the outer ring of the rolling bearing is fixed with the second eccentric block (18).