JP2003284965A - Centrifugal crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical centrifugal crusher that is not required to have a strengthened structure of a rotating shaft 20 such as an increased shaft diameter to cope with a tensile forth F1 received from a drive source 30. <P>SOLUTION: The centrifugal crusher comprises the rotating shaft 20 rotating a rotor 10, the drive source 30 installed on the side of the rotating shaft 20, and an endless-shaped transmission body spanned between the rotating shaft 20 and a shaft of the drive source 30 to transmit rotation of the drive source 30 to the rotating shaft 20. A countering apparatus 40 countering a tensile strength 50 acting on the rotating shaft 20 from the transmission body 31 is placed on the side of the rotating shaft 20. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a centrifugal crusher for crushing crushing raw materials such as minerals.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional centrifugal crusher of this type has a built-in rotor a which rotates at high speed. Rotational drive of the rotor a supports a rotating shaft b oriented vertically in the center of the lower part of the rotor a via a bearing c, and a belt e is provided between the lower part of the rotating shaft b and a motor d installed outside the machine. Bridging,
Rotation can be imparted to the rotor a, which is integral with the rotation shaft b, via the belt e. The belt e is required to be installed in a sufficiently stretched state in order to reliably transmit the rotational force.

[0003]

The conventional centrifugal crusher described above has the following problems. <A> A biasing force directed toward the approaching direction of the motor e always acts on the rotating shaft c. In order to counter this biasing force, the rotating shaft c must be designed to have a large diameter, and the bearing and the frame supporting the bearing must also be designed to have high strength. <B> As one of the methods to improve the crushing performance, the rotor a
It is known to increase the rotation speed of. A specific means is to use a motor having a high rotation torque performance, but the machine cost becomes very high and the power consumption also becomes large.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and provides a centrifugal crusher capable of reducing energy consumption by reducing the mechanical load on the rotating shaft. With the goal.

[0005]

In order to achieve the above-mentioned object, a centrifugal crusher of the present invention comprises a rotary shaft for rotating a rotor, a drive source installed on the side of the rotary shaft, and An endless transmission body that extends between the rotation shaft and the shaft of the drive source and that transmits the rotation of the drive source to the rotation shaft,
It is characterized in that a canceling device for canceling a tensile force received from the transmission body is arranged on the rotary shaft laterally of the rotary shaft.

Further, the centrifugal crusher according to the present invention is characterized in that, in the above-mentioned centrifugal crusher, a canceling device is arranged so that a canceling force acts on a substantially straight line connecting a drive source and a rotation shaft. Is.

Further, in the centrifugal crusher according to the present invention, in the above-mentioned centrifugal crusher, the canceling device is arranged on the drive source side so that the canceling force acts on a substantially straight line connecting the drive source and the rotating shaft. It is a feature.

[0008]

Embodiment 1 of the present invention will be described below with reference to the drawings.

<B> Overall Configuration As shown in FIG. 1, the centrifugal crusher of the present invention supports a rotating shaft 20 oriented in the vertical direction at the center of the lower part of a rotor 10 through a bearing 21, and the lower part of the rotating shaft 20. A transmission body 31 is laid between the drive source 30 and the drive source 30 installed outside the machine so that the rotor 10 can rotate at high speed. As the transmission member 31, a chain such as a V-belt, a flat belt or the like can be used,
The pulley 32 installed on the rotary shaft 20 and the drive source 30 are wound without slack. The present invention is configured by adding a canceling device 40 to a known crusher. Hereinafter, each part constituting the present invention will be described in detail.

<B> Canceling Device As shown in FIG. 2, the canceling device 40 is a device for canceling the pulling force F1 on the side of the driving source 30 acting on the rotary shaft 20 via the transmission 31, and the driving source 30 It is arranged on a substantially straight line connecting the rotating shaft 20 and on the opposite side of the drive source 30 that sandwiches the rotating shaft 20, and forcibly applies a tension force F2 to the rotating shaft 20.

The counteracting device 40 is provided with an elastic member 41 such as a spring or rubber, and a propagating member 42 extending from the elastic member 41 to the rotary shaft 20 to transmit a force. In addition, the transmission material 42
Is a rod body 44 and a holder 43 connected to one end of the rod body 44.
And. The other end of the rod body 44 penetrates the hole 12 provided in the housing 11 and protrudes to the outside of the housing 11. The protruding rod body 44 is covered with the elastic material 41, and the outer end of the rod body 44 abuts the passive plate 45. Then, the passive plate 45 is inserted and the nut 46 is screwed. By adjusting the tightening force of the nut 46, the tension force F2 with respect to the rotating shaft 21 can be arbitrarily set. The holder 43 is connected via a bearing 45 in a state where the rotation shaft 21 is allowed to rotate. A cover is provided above the rod 44 that traverses the inside of the housing 11 to protect it from crushed rocks.

[0012]

Operation will be described with reference to FIG. 2 showing a plane model of the counteracting device 40. The counteracting device 40 is arranged substantially opposite to the drive source 30 with the rotary shaft 20 sandwiched therebetween.

On the rotary shaft 20, the drive source 30 is connected to the transmission member 3.
A pulling force F1 for pulling the rotary shaft 20 to the outside via 1;
A tension force F2, which is generated by the repulsive force accumulated in the elastic member 41 of the counteracting device 40 and pulls the rotary shaft 20 outward through the passive plate 45 and the propagating member 42, acts. The tensile force F1 and the tensile force F2 act on the rotary shaft 20 in opposite directions to cancel each other out. As a result, the shaft 20 is not biased, and the posture of the shaft 20 to which no force is applied is retained.

The magnitude of the tension force F2 is set so that the tension amount F1 can be canceled by adjusting the tightening amount of the nut 46. As in this example, tension force F1 is applied to tension force F2
When the acting position of is applied far from the position of the bearing 21 that supports the rotating shaft 20, there is an advantage that the set value of the tension force F2 that opposes the tension force F1 can be reduced.

In addition, even if the magnitude of the pulling force F1 changes, or when a force different from the pulling force F1 reaches the rotating shaft 20, the elastic material 41 expands or shortens to cause these changes. Absorb.

[0016]

Embodiment 2 of the Invention The embodiment shown in FIG.
Tension force f from two directions opposite to the drive source 30 with respect to 0
It exerts a and fb. The cancellation device 40 of the present embodiment
Includes two rods 44a and 44b radially arranged and connected from a holder 43 installed on the rotary shaft 20, and elastic members 41a and 41b installed at the other ends thereof.

The tension forces fa and fb are the elastic materials 41a and 41, respectively.
b) are separately generated, and are collected in the holder 43 through the rods 44a and 44b and applied to the rotary shaft 20. The resultant force F3, which is a combination of these tension forces fa and fb, becomes a force on a substantially straight line connecting the drive source 30 and the rotary shaft 20, acts in the direction opposite to the tensile force F1, and cancels the tensile force F1.

As another form, one rod 44a,
One holder 43 is provided for each 44b, and the rotary shaft 2 is separately provided.
A mechanism for exerting a force on 0 may be used.

[0019]

[Third Embodiment of the Invention] The case where the counteracting device 40 exerts the tension forces F2 and F3 on the rotary shaft 20 has been described above, but this force may be changed to a pressing force to act. Hereinafter, the case will be described in detail.

The basic configuration of the counteracting device 40 of this example is the same as that of the first embodiment described above, and the force generated by exchanging the arrangement permutation of each component of the counteracting device 40 is used as the pressing force, and The arranging position of the counteracting device 40 is on the drive source 30 side on a straight line connecting the rotary shaft 20 and the drive source 30. The order of the constituent parts is such that the free end of the rod body 44 is arranged in the elastic member 41 which is housed inside the housing 11, the receiving plate 45 is brought into contact with the outer end thereof, and the nut 46 is screwed. is there. The pressing force can be adjusted by adjusting the tightening of the nut 46.
It can be set arbitrarily.

The repulsive force generated by the elastic material 41 is applied to the passive plate 4
5, the rod 44 is pressed against the rotary shaft 20 via the nut 46. A tensile force F1 that pulls the rotary shaft 20 outward and a pressing force that pushes the rotary shaft 20 outward are applied to the rotary shaft 20 at different distances from a bearing 21 that supports the rotary shaft 20 from the same direction. . As a result, two forces in opposite directions act on the rotary shaft 20 in an amount that is inversely proportional to their respective distances and cancel each other out.

[0022]

Fourth Embodiment In the above-described embodiments, the force exerted on the rotary shaft 20 is either a tension force or a pressing force, but the canceling device 40 may be provided with those forces at the same time. .

[0023]

Embodiment 5 The force exerted by the counteracting device 40 may be constant. Therefore, in this example, the members constituting the counteracting device 40 of the first embodiment are replaced, and the idler pulley 53, the idler pulley 53, and the rotary shaft 2 that are arranged in parallel are provided.
It is composed of an endless transmission body 51 and the like stretched between 0s (see FIG. 4). Transmission 5 continuous with idler pulley 53
Reference numeral 1 is a belt-shaped body that receives the rotation of the rotary shaft 20 from the pulley 52 and propagates it to the idler pulley 53 supported by the idler 50. Therefore, the transmission body 51 is always strained,
The rotating shaft 20 and the idling body 50 supporting it generate forces that tend to move toward each other. This becomes a force to pull the rotating shaft 20 in the direction of the idling body 50, and the pulling force F in the opposite direction is applied.
Cancel 1. The rotational energy that acts on the idling body 50 is not consumed with a particular purpose.

[0024]

Since the present invention has been described above, the following effects can be obtained. <A> The centrifugal crusher of the present invention is provided with a canceling device for canceling the biasing force received from the drive source. Therefore, it is economical because it is not necessary to design the rotating shaft to have a large diameter and to make the bearing and the frame supporting the bearing have high strength. In addition, stress is rarely concentrated on one location of the rotating shaft, and there is little concern about performance deterioration and fatigue fracture. <B> Furthermore, since the centrifugal crusher of the present invention reduces the load on the drive source, the performance of the drive source can be sufficiently exhibited. Therefore, the power consumption is the same as before, regardless of the machine cost. <C> Further, since the centrifugal crusher of the present invention has a simple structure, it can be easily assembled and replaced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of a centrifugal crusher of the present invention.

FIG. 2 is a detailed sectional view of II-II in FIG.

FIG. 3 is an explanatory plan view of the second embodiment.

FIG. 4 is a side view for explaining the fourth embodiment.

FIG. 5 is a schematic explanatory view of a conventional centrifugal crusher.

[Explanation of symbols]

10 ... Rotor 20 ... Rotating axis 30 ... Drive source 31 ... Transmission body 40..Negative device F1 ... Tensile force F2 ... tension

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[Procedure amendment]

[Submission date] April 10, 2002 (2002.4.1)
0)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

[0003]

The conventional centrifugal crusher described above has the following problems. <A> A biasing force directed toward the approaching direction of the motor d always acts on the rotating shaft b . Or designing a rotary shaft b larger in diameter to combat this biasing force, it must also be designed for high strength frame for supporting the bearings c and bearings c. <B> As one of methods for improving the crushing performance, it is known to increase the rotation speed of the rotor a. A specific means is to use a motor d having a high rotation torque performance, but the machine cost becomes very high and the power consumption also becomes large.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

The counteracting device 40 is provided with an elastic member 41 such as a spring or rubber, and a propagating member 42 extending from the elastic member 41 to the rotary shaft 20 to transmit a force. In addition, the transmission material 42
Is a rod body 44 and a holder 43 connected to one end of the rod body 44.
And. The other end of the rod body 44 penetrates the hole 12 provided in the housing 11 and protrudes to the outside of the housing 11. The protruding rod body 44 is covered with the elastic material 41, and the outer end of the rod body 44 abuts the passive plate 45. It is, screwing the nut 46 inserted through the receiving work plate 45. By adjusting the tightening force of the nut 46, the tension force F2 with respect to the rotating shaft 20 can be arbitrarily set. The holder 43 is connected via the bearing 45 in a state where the rotation shaft 20 is allowed to rotate. A cover is provided above the rod 44 that traverses the inside of the housing 11 to protect it from crushed rocks.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

The repulsive force generated by the elastic material 41 is applied to the passive plate 4
5, the rod 44 is pressed against the rotary shaft 20 via the nut 46. The rotating shaft 20 has a different distance from a bearing 21 that supports the rotating shaft 20 in the same direction, a tensile force F1 that pulls the rotating shaft 20 to the outside, and the rotating shaft 20 to the inside.
And the pressing force to return push towards is applied. As a result, two forces in opposite directions act on the rotary shaft 20 in an amount that is inversely proportional to their respective distances and cancel each other out.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of a centrifugal crusher of the present invention.

FIG. 2 is a detailed sectional view of II-II in FIG.

FIG. 3 is an explanatory plan view of the second embodiment.

FIG. 4 is an explanatory side view of the fifth embodiment.

FIG. 5 is a schematic explanatory view of a conventional centrifugal crusher.
─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 10, 2002 (2002.4.1)
0)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

The counteracting device 40 is provided with an elastic member 41 such as a spring or rubber, and a propagating member 42 extending from the elastic member 41 to the rotary shaft 20 to transmit a force. In addition, the transmission material 42
Is a rod body 44 and a holder 43 connected to one end of the rod body 44.
And. The other end of the rod body 44 penetrates the hole 12 provided in the housing 11 and protrudes to the outside of the housing 11. The protruding rod body 44 is covered with the elastic material 41, and the outer end of the rod body 44 abuts the passive plate 45. Then, the receiving plate 45 is inserted and the nut 46 is screwed. By adjusting the tightening force of the nut 46, the tension force F2 with respect to the rotating shaft 20 can be arbitrarily set. The holder 43 is connected via a bearing 47 while allowing the rotation of the rotary shaft 20. A cover is provided above the rod 44 that traverses the inside of the housing 11 to protect it from crushed rocks.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (3)

[Claims] 1. A rotation shaft for rotating a rotor, a drive source installed on a side of the rotation shaft, and a rotation source and a shaft of the drive source, and the rotation of the drive source is rotated by the rotation shaft. In a centrifugal crusher equipped with an endless power transmission body that is transmitted to a shaft, a canceling device that cancels a tensile force received from the power transmission member to the rotary shaft is arranged laterally of the rotary shaft, Crushing machine. 2. The centrifugal crusher according to claim 1,
A centrifugal crusher characterized in that a canceling device is arranged so that a canceling force acts on a substantially straight line connecting a drive source and a rotating shaft. 3. The centrifugal crusher according to claim 1,
A centrifugal crusher characterized in that a canceling device is arranged on the drive source side so that the canceling force acts on a substantially straight line connecting the drive source and the rotation axis.