JP4866062B2 - Vibration crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reliable vibration crusher, the maintenance of which is easy. <P>SOLUTION: In the vibration crusher, a cylindrical drum 1 charged with a crushing object matter and a frame 2 surrounding the drum are arranged to align the center of gravity, and are joined with springs 3 arranged on the left, right, top and bottom, and at the same time, electromagnetic exciting magnets 4a-4d are arranged on the left, right, top and bottom of the cylindrical drum 1. The springs 3 have the same spring constant individually, and at the same time, are arranged such that the resultant force of the springs are oriented to the center of gravity of the cylindrical drum 1 and the frame 2. The electromagnetic exciting magnets 4a-4d have the same function individually, and at the same time, are arranged such that the vibration direction of the electromagnetic exciting magnet is oriented to the center of gravity of the cylindrical drum 1 and the frame 2. Further, phases of an electric current passing through the electromagnetic exciting magnets 4c and 4d arranged on the top and bottom and an electric current passing through the electromagnetic exiting magnets 4a and 4b arranged on the left and right are displaced by 90&deg; by natural vibration control to produce circular vibration to the cylindrical drum 1. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a pulverizer for pulverizing an object to be pulverized such as a mineral, and more particularly to a vibration pulverizer for pulverizing an object to be pulverized by vibrating a cylindrical drum charged with the object to be pulverized.

  Conventionally, as a pulverizer for pulverizing an object to be pulverized such as a mineral, a vibration pulverizer for pulverizing the object to be pulverized by vibrating a cylindrical drum charged with the object to be pulverized has been widely used. The basic configuration of this vibration pulverizer is to vibrate a cylindrical drum by a vibrating means such as a vibrator as disclosed in Patent Document 1, for example. Conventionally, as this vibration means, for example, as disclosed in Patent Document 2, an eccentric motor is used, or an eccentric weight is rotated by the motor to generate a forced vibration force, and a cylindrical drum is provided. It was the mainstream to grind the material to be ground.

However, in such a vibration means using a motor, a bearing is indispensable to hold the rotating shaft of the motor. Especially when the device becomes large, the heat loss of the bearing increases, and at the same time, lubrication, replacement, etc. Maintenance is also difficult. In addition, since the vibration means using a motor causes vibration several times as much as that during normal operation when the motor is started, this measure also requires a large cost and lacks reliability.
JP 7-299374 A JP-A-7-185377

  The present invention provides a vibration crusher that is easy to maintain and reliable.

  The vibration pulverizer according to the present invention includes a cylindrical drum in which an object to be crushed and a frame surrounding the cylindrical drum are arranged with their respective centers of gravity aligned, and the cylindrical drum and the frame are arranged on the top, bottom, left, and right of the cylindrical drum. And electromagnetic exciting magnets are arranged on the upper, lower, left and right sides of the cylindrical drum. In the vibration crusher of the present invention, the springs that join the cylindrical drum and the frame have the same spring constant, and are arranged so that the resultant force of each spring faces the center of gravity of the cylindrical drum and the frame. In addition, the electromagnetic excitation magnets arranged on the upper, lower, left and right sides of the cylindrical drum have the same performance (the same core and the same winding), and the vibration direction of each electromagnetic excitation magnet is the cylindrical drum. And arranged so as to face the center of gravity of the frame. And, by natural vibration control, circular vibration is generated in the cylindrical drum by shifting the phase of the current flowing through the upper and lower electromagnetic excitation magnets and the phase of the current flowing through the left and right electromagnetic excitation magnets by 90 degrees. Let

  Since the vibration pulverizer of the present invention has the above-described configuration, the vibration pulverizer is operated at the resonance frequency immediately after being activated, and can be operated smoothly at the same time as the normal operation at the time of activation. Further, since no bearing is required, there is no loss due to heat generation, and the energy saving effect is great. In addition, it is not necessary to lubricate or replace the bearing as in the conventional case, and maintenance can be easily performed.

  As described above, according to the present invention, it is possible to provide a vibration crusher that is easy to maintain and reliable.

  Hereinafter, the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view for explaining the principle of the present invention. As shown in the figure, in the vibration pulverizer according to the present invention, a cylindrical drum 1 in which an object to be crushed is charged and a frame 2 surrounding the cylindrical drum 1 are arranged with their respective centers of gravity aligned. Are joined by springs 3 arranged on the upper, lower, left and right sides of the cylindrical drum 1, and electromagnetic excitation magnets 4 a to 4 d are arranged on the upper, lower, left and right sides of the cylindrical drum 1. The frame 2 is joined to the foundation 6 via a vibration-proof spring 5.

  The springs 3 that join the cylindrical drum 1 and the frame 2 have the same spring constant, and are arranged so that the resultant force of the springs 3 faces the center of gravity of the cylindrical drum 1 and the frame 2. In addition, the electromagnetic excitation magnets 4a to 4d arranged on the upper, lower, left, and right sides of the cylindrical drum 1 have the same electromagnetic excitation characteristics, and the vibration directions of the respective electromagnetic excitation magnets 4a to 4d (for electromagnetic excitation). The magnet is arranged so that the direction of the center line of the magnet faces the center of gravity of the cylindrical drum 1 and the frame 2.

  In such a configuration, in the present invention, the phase of the current flowing through the electromagnetic excitation magnets 4c and 4d arranged above and below and the current flowing through the electromagnetic excitation magnets 4a and 4b arranged right and left are shifted by 90 degrees. Thus, strong circular vibration is generated in the cylindrical drum 1 to pulverize the object to be crushed in the cylindrical drum 1.

The vibration method using the electromagnetic vibration magnets 4a to 4d will be described more specifically with reference to FIG. In FIG. 1, assuming that the center line of the left and right electromagnetic exciting magnets 4a and 4b is XX and the center line of the upper and lower electromagnetic exciting magnets 4c and 4d is YY, first, the electromagnetic of the XX axis The vibration magnet 4a is supplied with a current subjected to natural vibration control between 0 and 180 degrees for the electric phase, no current is supplied between 180 and 360 degrees, and the electromagnetic excitation magnet 4b is 0 to 180 degrees. If the current is not flowed during the time, the current is flowed during the range of 180 to 360 degrees, and the current is controlled in this order, the vibration force Fx generated in the XX direction is expressed by the following equation (1).
Fx = F ₀ sin ωt (F ₀ : vibration force) (1)

On the other hand, in the Y-Y axis electromagnetic excitation magnet 4c, an electric current advanced 90 degrees from the above is applied for 90 to 270 degrees, and no current is supplied for 270 to 450 degrees. If no current is passed through the magnet 4d for 90 to 270 degrees, but a current is passed for 270 to 450 degrees, the vibration force Fy generated in the Y-Y direction is expressed by the following equation (2).
Fy = F ₀ sin (ωt + π / 2) = F ₀ cos ωt (2)

Therefore, the resultant force F of Fx and Fy is as shown in the following equation (3).
F = (Fx ² + Fy ² ) ^1/2 = F ₀ ² (sin ² ωt + cos ² ωt) ^1/2 = F ₀ (3)
That is, the vibration force of F ₀ is rotating at the angular velocity ω. Thereby, strong circular vibration can be generated in the cylindrical drum 1.

  FIG. 2 shows a cross section of a vibration crusher to which the present invention is applied. 3 shows a side view of the vibration pulverizer of FIG. 2, the upper right half shows the aa cross section of FIG. 2, and the upper left half shows the bb cross section of FIG.

  In FIG. 3, reference numeral 7 denotes a wound S core, and an A core 8 is attached to the cylindrical drum 1 by a gap adjusting bolt 9 with a gap g therebetween. The S core 7 and the A core 8 constitute the electromagnetic excitation magnet described in FIG.

  The S core 7 is attached to the channel 10, and a total of 16 springs 3 are attached to the spring attachment seat 11 in this embodiment. The spring 3 is compressed and attached in elastic contact with the cylindrical drum 1. Reference numeral 12 denotes a terminal box in which the windings of the S core 7 are collected here, and electric power is supplied from the outside by natural vibration control.

  And as demonstrated in FIG. 1, by controlling the electric current sent through each electromagnetic exciting magnet (winding of S core 7), the cylindrical drum 1 and the frame 2 vibrate greatly in opposite directions, A strong circular vibration is generated to pulverize the object to be crushed in the cylindrical drum 1.

  As described above, in the vibration crusher of the present invention based on the natural vibration control, only the power consumed in the cylindrical drum is related to the suction force of the electromagnetic exciting magnet, and the plate thickness is increased to increase the durability of the cylindrical drum. Even if it is thickened and reinforced, it is only necessary to increase the resonance spring by that amount regardless of the power consumption and the attractive force.

  In addition, the vibration pulverizer of the present invention does not have a bearing, and there is no need to replace the bearing as in the conventional vibration pulverizer, and maintenance is easy. In addition, since the conventional resonance-type vibration crusher is operated at a frequency 10% to 15% higher than the resonance frequency for operational stability, if even one of the resonance springs breaks, it becomes closer to the resonance point so that the amplitude becomes larger. However, the vibration crusher using the natural vibration control according to the present invention is broken because the vibration amplitude is constant and does not change even if a few springs are broken. There is no worry about it. Furthermore, since the conventional one vibrates several times larger than the amplitude during normal operation at the time of starting or stopping, it is difficult to take countermeasures, and the vibration-proof spring is very expensive. On the other hand, since the vibration crusher of the present invention performs natural vibration control, the amplitude at the time of starting or stopping is the same as the amplitude at the time of normal operation, and the vibration isolation spring is small and inexpensive.

  Further, in the conventional vibration pulverizer, the bearing is the most problematic and expensive when scaling up, but in the vibration pulverizer of the present invention, it is only necessary to increase the resonance spring. Unlike big tel springs, springs are standard specifications, so they can be obtained at low cost, and large-scale vibration crushers can be provided at low cost.

It is sectional drawing for demonstrating the principle of this invention. The cross section of the vibration crusher to which this invention is applied is shown. FIG. 2 shows a side view of the vibration pulverizer of FIG. 2, and the upper right half shows the aa cross section of FIG. 2, and the upper left half shows the bb cross section of FIG. 2.

Explanation of symbols

1: Cylindrical drum 2: Frame 3: Spring 4: Electromagnetic excitation magnet 5: Anti-vibration spring 6: Foundation 7: S core 8: A core 9: Adjustment bolt 10: Channel 11: Spring mounting seat 12: Terminal box

Claims (1)

A cylindrical drum for charging the material to be crushed and a frame surrounding the cylindrical drum are arranged with their respective centers of gravity aligned, and the cylindrical drum and the frame are joined by springs arranged at the top, bottom, left and right of the cylindrical drum. Electromagnetic excitation magnets are arranged on the top, bottom, left and right,
The springs that join the cylindrical drum and the frame have the same spring constant, and are arranged so that the resultant force of each spring faces the center of gravity of the cylindrical drum and the frame,
The electromagnetic excitation magnets arranged on the upper, lower, left and right sides of the cylindrical drum have the same performance, and are arranged so that the vibration direction of each electromagnetic excitation magnet faces the center of gravity of the cylindrical drum and the frame,
Further, by the natural vibration control, circular vibration is applied to the cylindrical drum by shifting the phase of the current flowing through the electromagnetic excitation magnets arranged above and below and the current flowing through the electromagnetic excitation magnets arranged right and left by 90 degrees. Vibration crusher to generate.

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