Novel composite vibration ore separation shaking table

Abstract

The utility model belongs to the technical field of vibration screening, and particularly relates to a novel composite vibration ore separation shaking table which is composed of a table body, a slope adjusting device, a support and a four-axis inertia composite excitation device. According to the Lissajous vibration synthesis principle, the four-axis inertia composite excitation device can synthesize multiple forms of composite vibration modes to drive the bed body to perform composite vibration. On the premise of applying a longitudinal excitation force to the bed body, the four-axis inertia compound excitation device provides a transverse excitation force to the bed body, so that the differential motion of the bed body is increased, the stress of mineral aggregates on the bed surface is more diversified, the active degree of mineral particles on the bed surface can be effectively improved, the loose degree of the mineral particles can be improved, and the service life of the mineral particles is prolonged. Therefore, the sorting accuracy of the shaking table is improved.

Description

Technical Field

[0001] The utility model belongs to the field of vibration screening, and particularly relates to a new type of composite vibration ore dressing shaking table. Background Technique

[0002] The ore dressing shaking table is a commonly used device for separating fine-grained ores. When carrying out ore dressing work, it is necessary to pour the pulp into the ore dressing shaking table for screening. The ore dressing shaking table is a very important and commonly used device in ore dressing work. The existing ore dressing shaking table device drives the table surface to shake by a transverse reciprocating asymmetric vibration method of the transmission mechanism and cooperates with the transverse water flow force to screen the ore materials. The vibration mode of the table body is relatively single, and the combined action of the water flow impact force and the differential movement of the table surface received by the particle group is limited, and the dispersion degree of the ore material group on the table surface is limited. Therefore, there is still room for improvement in the vibration mode of the table body, the looseness of the ore materials, and the sorting accuracy of the shaking table. Content of the Utility Model

[0003] The purpose of the utility model is to provide a new type of composite vibration ore dressing shaking table, aiming to improve the activity degree of mineral particles on the table surface, improve the looseness of mineral particles, and further improve the sorting accuracy of the shaking table.

[0004] The purpose of the utility model is realized by the following technical solutions:

[0005] A new type of composite vibration ore dressing shaking table of the utility model mainly includes four parts: a table body, a slope adjusting device, a support and a four-axis inertial composite vibration exciter.

[0006] Metal bed bars are welded on the table surface of the table body, and the bed bars are lowered from the feeding end to the opposite side and taper out on an oblique line.

[0007] The slope adjusting device is welded to the left side of the table body and is fixedly connected to the support through a support spring. By adjusting the bolts on the device, the height of the left side of the table body can be adjusted to adjust the inclination angle of the table body.

[0008] The right side of the support is bolted to the feeding trough and the water supply trough through a support plate. This structure is not in direct contact with the table body and does not perform composite vibration following the table body, reducing energy consumption.

[0009] The four-axis inertial composite vibration exciter is installed at the bottom of the table body, its center of mass coincides with the center of mass of the table body, and the vibration plane coincides with the bottom surface of the table body. It is composed of a transmission structure, a motor and a vibration exciter box.

[0010] The transmission structure is composed of five shafts connected by gears, including a driving shaft and four driven shafts. The driving shaft has two transmission gears with a large and a small number of teeth in an integer ratio, and each of the four driven shafts has a gear. The four driven shafts are divided into two groups, upper and lower, and left and right. Each group of driven wheel gears meshes with each other and has the same number of teeth. The upper and lower groups of transmission wheel gears mesh with the transmission gear with a large number of teeth on the driving shaft, and the left and right groups of transmission wheel gears mesh with the transmission gear with a small number of teeth on the driving shaft. The two groups of transmission wheel gears are not in the same plane and do not interfere with each other. Each driven shaft is equipped with an eccentric vibrator.

[0011] The four-axis inertial composite excitation device can control the frequency ratio and phase difference of the excitation device by adjusting the gear ratio of the upper and lower driven shafts and the left and right driven shafts and the relative position of the vibrator, forming two mutually perpendicular simple harmonic linear vibrations of different phases, different frequencies and different amplitudes, and then these two simple harmonic linear vibrations are synthesized into vibrations of various complex motion trajectories according to the Lissajous vibration synthesis theory, thereby driving the bed to perform composite vibrations.

[0012] Advantages of the utility model:

[0013] Compared with the existing ore-selecting shaking table, the utility model is a new type of composite vibration ore-selecting shaking table. According to the Lissajous vibration synthesis principle, the four-axis inertial composite excitation device can synthesize various forms of composite vibration modes to drive the bed body to perform composite vibration. The excitation device can provide a lateral excitation force to the bed body on the premise of applying a longitudinal excitation force to the bed body, increase the differential motion of the bed body, make the force of the bed surface mineral material more diversified, effectively improve the activity of the mineral particles on the bed surface, improve the looseness of the mineral particles, and can accurately sort out a variety of mineral products of different qualities, thereby improving the sorting accuracy of the shaking table. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the support and bed structure of the utility model.

[0016] Figure 3 It is a schematic diagram of the four-axis inertial composite excitation device of the utility model.

[0017] Figure 4 It is a schematic diagram of the transmission structure of the four-axis inertial composite excitation device of the utility model.

[0018] Figure 5 This is the principle diagram of the four-axis inertial composite excitation of the utility model.

[0019] Figure 6 The figure is a motion trajectory diagram of the Lissajous vibration mode that can be synthesized by the utility model.

[0020] In the figure: 1. Bed body; 2. Water supply tank; 3. Slope adjusting device; 4. Four-axis composite vibration exciter; 41 Transmission mechanism; 411 - 416 Gears; 42 Motor; 43 Vibration exciter box; Ⅰ. Driving shaft; Ⅱ, Ⅲ, Ⅳ, V. Driven shafts; a1, a2, b1, b2. Eccentric vibrators; 5. Ore feeding tank; 6. Support spring; 7. Support; 8. Support plate. Specific embodiments

[0021] The specific embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0022] As Figure 1-6 shown, a novel composite vibration ore dressing shaking table of the present utility model mainly includes four parts: a bed body 1, a slope adjusting device 3, a support 7, and a four-axis inertial composite vibration exciter 4.

[0023] A baffle 12 is provided at the feeding end of the bed body 1 to prevent ore from falling off from the top. Metal bed bars 13 are welded on the bed surface. The bed bars 13 decrease from the feeding end to the opposite side and taper out on an oblique line.

[0024] The slope adjusting device 3 is welded to the left side of the bed body 1 and is fixedly connected to the support 7 through a support spring 6. By adjusting the bolts on the device, the height of the left side of the bed body 1 can be adjusted to adjust the inclination angle of the bed body 1.

[0025] The right side of the support 7 is bolt-connected to the ore feeding tank 5 and the water supply tank 2 through a support plate 8. This structure is not in direct contact with the bed body 1 and does not perform composite vibration following the bed body 1, reducing energy consumption.

[0026] The four-axis inertial composite vibration exciter 4 is installed at the bottom of the bed body 1. Its center of mass coincides with the center of mass of the bed body, and the vibration plane (HOL plane) coincides with the bottom surface of the bed body 1. It is composed of a transmission structure 41, a motor 42, and a vibration exciter box 43.

[0027] The transmission structure 41 consists of five shafts. Among them, shaft Ⅰ is the driving shaft, and the other four shafts are driven shafts. They are connected and driven by gears. There are two transmission gears 411 and 412 with different numbers of teeth on the driving shaft Ⅰ, and each of the four driven shafts has a gear. Gear 414 and 415 mesh with each other and have the same number of teeth, which can ensure that the rotation speeds of shaft Ⅱ and shaft Ⅳ are the same and the rotation directions are opposite. Gear 413 and 416 mesh with each other and have the same number of teeth, which can ensure that the rotation speeds of shaft Ⅲ and shaft V are the same and the rotation directions are opposite. Gear 414, 415 and gear 413, 416 are not in the same plane, and the two groups do not interfere with each other. Gear 411 and gear 415 mesh with each other, and the transmission ratio is i1 = Z5 / Z1; Gear 412 and gear 413 mesh with each other, and the transmission ratio is i2 = Z3 / Z2. By controlling the ratio of i1 to i2 through the number of teeth of the gears, the rotation speeds of the upper and lower oscillators a1, a2 and the left and right oscillators b1, b2 are controlled. By controlling the rotation speed ratio of the upper and lower shafts Ⅲ, V and the left and right shafts Ⅱ, Ⅳ, the frequency ratio of the eccentric oscillators on the upper and lower shafts Ⅲ, V and the left and right shafts Ⅱ, Ⅳ is further controlled.

[0028] An eccentric oscillator is installed on each driven shaft. Ensure that the four eccentric oscillators a1, a2, b1, and b2 are installed in the same plane. At the same time, the angle of the eccentric oscillator on each shaft can be adjusted. Because the shafts are forced to rotate through gear meshing, the relative positions of the eccentric oscillators on each shaft are always fixed. Thus, two simple harmonic linear vibrations with different phase differences can be synthesized in the X and Y directions, and then synthesized into Figure 6 the Lissajous composite vibration.

[0029] By changing the initial positions of the eccentric oscillators on the four shafts, the phase difference of the simple harmonic linear vibrations in the X direction and the Y direction can be generated accordingly.

[0030] When the novel composite vibration ore dressing shaking table of the present utility model is sorted, its composite vibration synthesis mechanism is as follows: As Figure 5 shown, after the motor is powered on, the exciting forces of the left and right group of eccentric oscillators in the X direction cancel each other out, synthesizing a simple harmonic linear vibration in the Y direction. The exciting forces of the upper and lower group of eccentric oscillators in the Y direction cancel each other out, synthesizing a simple harmonic linear vibration in the X direction. The two simple harmonic vibrations are synthesized in the vibration plane Figure 6 into the composite vibration, ensuring that the vibration plane coincides with the bottom surface of the bed body. The bed body vibrates according to the composite vibration curve, and combined with the action of the transverse water flow, the upper light minerals are subjected to greater water flow fluctuations and move more along the transverse direction of the bed surface, and finally are discharged from the tailings side. The heavy mineral particles located at the bottom of the bed layer directly undergo composite vibration under the differential movement of the bed surface and are discharged from the concentrate end.

[0031] The present utility model can synthesize a variety of composite vibration curves by adjusting the gear tooth ratio in the four-axis composite excitation device 4 and the relative positions of the oscillators. The frequency ratios corresponding to different composite vibration curves and the relative positions of the eccentric rotors are as Figure 6as shown

[0032] Compared with the traditional ore dressing shaking table, the superiority of the present utility model is reflected in that: the traditional ore dressing shaking table is only subjected to the acting force of the transverse water flow and the longitudinal vibration of the table surface. On this premise, the present invention further provides a transverse exciting force for the bed body, increases the differential movement of the bed body, increases the relative movement between ore particles, a shear velocity difference appears between the material layers, increases the looseness of the bed layer, and improves the precise separation performance of the shaking table.

Claims

1. A novel composite vibrating ore dressing shaking table, characterized in that, It includes four parts: a bed body (1), a slope adjustment device (3), a support (7), and a four-axis inertial compound vibration exciter (4); the four-axis inertial compound vibration exciter (4) is installed at the bottom of the bed body (1), and its center of mass coincides with the center of mass of the bed body (1). It is composed of a transmission structure (41), a motor (42), and a vibration exciter box (43), and the vibration plane of the transmission structure (41) coincides with the bottom surface of the bed body (1); the transmission structure (41) consists of five shafts connected by gears, including a driving shaft and four driven shafts; there are two transmission gears with integer ratio of tooth numbers on the driving shaft, and one transmission gear on each of the four driven shafts; among them, the four driven shaft transmission gears are divided into two groups, upper and lower, left and right; the driven shaft transmission gears in the upper and lower group have the same number of teeth, mesh with each other, and mesh with the large-tooth-number transmission gear on the driving shaft; the driven shaft transmission gears in the left and right group have the same number of teeth, mesh with each other, and mesh with the small-tooth-number transmission gear on the driving shaft; the driven shaft transmission gears in the upper and lower, left and right groups are not in the same plane and do not interfere with each other; an eccentric vibrator is installed on each driven shaft, and the four eccentric vibrators are installed in the same plane.

2. The novel composite vibrating ore dressing shaking table according to claim 1, wherein For the four-axis inertial compound vibration exciter (4), by adjusting the gear tooth number ratio of the upper and lower driven shafts and the left and right driven shafts and the relative positions of the eccentric vibrators, the frequency ratio and phase difference of the vibration exciter can be controlled to form two simple harmonic linear vibrations that are perpendicular to each other, have different phases, different frequencies, and different amplitudes. Then, these two simple harmonic linear vibrations are synthesized into vibrations with various complex motion trajectories according to the Lissajous vibration synthesis theory, driving the bed body (1) to perform compound vibration.

3. A novel composite vibrating ore dressing shaking table according to claim 1, characterized in that, The slope adjustment device (3) is welded to the left side of the bed body (1) and is fixedly connected to the support (7) through a support spring (6). By adjusting the bolts on this device, the height of the left side of the bed body (1) can be adjusted, thereby realizing the adjustment of the tilt angle of the bed body (1).

4. A novel composite vibrating ore dressing shaking table according to claim 1, characterized in that, The right side of the support (7) is bolted to the ore feeding trough (5) and the water feeding trough (2) through a support plate (8).

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