WO2007105292A1

WO2007105292A1 - Centrifugal crusher

Info

Publication number: WO2007105292A1
Application number: PCT/JP2006/304887
Authority: WO
Inventors: Takato Kaya
Original assignee: Kotobuki Engineering & Manufacturing Co., Ltd.
Priority date: 2006-03-13
Filing date: 2006-03-13
Publication date: 2007-09-20
Also published as: JPWO2007105292A1

Abstract

A centrifugal crusher having significantly improved crushing efficiency and energy saving characteristics. Support bodies (17) are projected from a side section of a rotor (10), and hammers (11) are attached to the heads of the support bodies (17). As a result, a penetration space is formed between the inner side of the hammers (11) and the side section of the rotor (10).

Description

Centrifugal crusher

Technical field

[0001] The present invention relates to a centrifugal crusher that crushes crushing raw materials such as rocks, minerals, and concrete glass.

Background art

[0002] Crushing raw material introduced into a rotor that rotates at high speed in one direction around a vertical axis is discharged at high speed from a plurality of discharge ports established in the port using centrifugal force generated by rotation of the port. A centrifugal crusher that collides with a dead bed formed in a crushing chamber around the rotor and crushes it finely is known as disclosed in Patent Document 1.

Further, as shown in FIG. 4, a centrifugal crusher is known from Patent Document 2 in which a hammer 11 is provided on the peripheral surface of the rotor 10 to increase the crushing efficiency.

In this centrifugal crusher, the noma 11 hits and crushes the crushing raw material 30 released from the discharge loci of the mouth 10.

Patent Document 1: Japanese Patent Laid-Open No. 11 28376

Patent Document 2: JP 2000-153169 A

Disclosure of the invention

Problems to be solved by the invention

[0004] The centrifugal crusher described above has the following problems.

(1) As the rotor 10 rotates at a high speed, the hammer 11 performs a blade function. As a result, a unidirectional swirling wind W is generated in the crushing chamber.

Since the swirl wind W is a high speed that is not much different from the rotational speed of the rotor 10, the hammer 11's striking force against the crushing raw material 30 riding on the swirl wind W is mitigated, and the crushing action by the hammer 11 is fully exerted. I can't.

(2) Centrifugal crusher is equipped with a drive source 40 such as an electric motor for rotating the rotor 10.1S It is necessary to install a drive source 40 with large energy consumption to rotate the heavy rotor 10 with a large diameter at high speed. Yes, there is room for economic improvement. [0005] The present invention has been made to solve the above problems, and an object of the present invention is to provide the following centrifugal crusher.

(1) Significantly improve crushing efficiency.

(2) To save energy in the drive source that rotates the rotor.

Means for solving the problem

[0006] A first invention of the present application includes a rotor that rotates around a rotating shaft, and a crusher body that houses the rotor and forms a crushing chamber therein, and a hammer projects around the rotor. A centrifuge crusher provided with a support projecting from the side of the rotor, and a hammer attached to the support to form a transmission space between the inside of the hammer and the side of the rotor. A centrifugal crusher is provided.

The second invention of the present application is characterized in that, in the first invention, a plurality of hammers are provided with a side force of the rotor at a predetermined distance through a plurality of support members protruding from the side of the rotor. A centrifugal crusher is provided.

According to a third invention of the present application, in the first invention, the hammer has an extension part, and the extension part crushes the raw material falling below the raw material drop point of the dead bed provided around the rotor. A centrifugal crusher is provided.

A fourth invention of the present application provides a centrifugal crusher according to the first invention, wherein the hammer has a vertically long striking surface.

The invention's effect

[0007] The present invention can obtain the following excellent effects.

(1) By forming a transmission space not only on the outside of the hammer but also on the inside of the hammer and the side of the rotor, the speed of the swirling air generated in the crushing chamber can be significantly reduced.

(2) Along with the deceleration of the swirling wind, the crushing raw material and the hammer will have a higher impact relative speed, and the crushing raw material will be significantly improved in crushing efficiency.

(3) With the reduction of the rotor diameter, energy can be saved in the drive source that rotates the rotor.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

[0009] (1) Outline of centrifugal crusher

Fig. 1 shows a longitudinal sectional view of a centrifugal crusher according to the present invention, and Fig. 2 shows a horizontal sectional view thereof. The basic configuration of a centrifugal crusher is the same as that of the conventional centrifugal crusher described above. A rotor 10 that rotates in one direction around the rotating shaft 12 and a crusher body 20 that rotatably accommodates the rotor 10 are configured.

In the centrifugal crusher according to the present invention, the hammer 11 is provided with a side force of the rotor 20 at a predetermined distance, and a permeation space is also formed between the inside of the hammer 11 and the side of the rotor 10. It is.

Hereinafter, main components will be described in detail.

[0010] (2) Rotor

The rotor 10 includes a top plate 13 and a bottom plate 14 that are arranged to face each other up and down at a predetermined interval.

Between the plates 13 and 14, a plurality of open outlets 15 for discharging the crushed raw material are formed. The top plate 13 may be omitted.

In this example, the explanation will be given on the case where three discharge ports 15 are formed on the circumferential surface of the rotor 10 at equal intervals. For example, the number of the discharge ports 15 formed may be two or four or more. A number shall be selected.

A tip end 16 made of a hard material is provided at the discharge end portion of each discharge port 15 to protect the discharge end portion from the collision force of the crushing raw material 30.

In this figure, the deadrest 32 shown in the rotor 10 is shown as a force. Instead of the deadrest 32, the rotor 10 may be composed of a wear-resistant material provided radially, and the tip 16 may be omitted. is there.

An opening through which the crushing raw material 30 can be supplied is formed at the center of the top plate 13.

A rotating shaft 12 is provided at the center of the bottom surface of the bottom plate 14 so that the rotor 10 can be rotated in one direction by receiving rotational driving of a driving source 40 such as a motor.

[0012] (3) Hammer Support members 17 are horizontally projected at a plurality of locations on the peripheral surface of the rotor 10, and a hammer 11 oriented vertically is fixed to the end of each of the support members 17.

Here, the reason why the hammer 11 is separated from the rotor 10 will be described.

First, in a conventional centrifugal crusher with a rotor 11 protruding directly around the rotor 10, a method of increasing the rotation speed V of the hammer 11 by increasing the protrusion length of the hammer 11 in order to increase the crushing efficiency of the hammer 11 Can be considered.

2

If the hammer 11 having a large projecting length is attached while the force is applied, the hammer 11 functions as a blade member for stirring the air, so that a high-speed swirling air is generated in the crushing chamber.

For this reason, the protrusion length of the hammer 11 is increased to increase the outermost rotation speed V of the hammer 11.

2 Even when the high-speed swirling air is generated in the crushing chamber, the hammering force of the hammer 11 against the crushing raw material 30 is mitigated, and the crushing action of the hammer 11 cannot be fully exhibited.

On the other hand, the present invention provides a hammer 11 at a predetermined distance from the rotor 10 on the side of the rotor 10 in which the discharge port 15 that eliminates the above-described adverse effects is formed. By forming a permeation space between the inside of 11 and the side of the rotor 10, the swirling air generated in the crushing chamber 21 can be greatly reduced.

Accordingly, the present invention is capable of hitting and destroying the crushed raw material with the rotational speed V of the outermost circumference of the hammer 11 under the environment, while being hardly affected by the swirling wind.

2

[0015] Therefore, the size of the hammer 11 that crushes by crushing the crushing raw material 30 existing in the crushing chamber 21 does not significantly impair the hitting and breaking function of the crushing raw material 30 and generates swirling air in the crushing chamber 21. To a size that can suppress

The shape of the striking surface of the hammer 11 may be a polygonal shape, a circular shape or the like in addition to a vertically long rectangular shape as shown in the figure.

[0016] The support 17 has a strength that can withstand the hammering reaction force of the hammer 11, and appropriately selects a size and shape that can suppress the generation of swirling air in the crushing chamber.

In addition to the form of the bar as shown in the drawing, the support 17 may be a plate having a streamlined cross-sectional shape or an open-hole structure capable of transmitting air.

[0017] The number of hammers 11 installed through the support 17 is one or more. When a plurality of hammers 11 are installed on the rotor 10, the rotor 10 as a whole may be arranged at unequal intervals, in addition to being arranged at equal intervals on the side of the rotor 10.

In addition, there are cases where a plurality of hammers 11 are arranged between the adjacent discharge ports 15 at different positions before and after the rotation direction of the port 10.

Further, the protrusion length of the support member 17 (the separation length of the sleeve 11) may be made uniform or non-uniform.

Also, the hammer 11 is not limited to a single continuous member, but the hammer 11 may be divided in the horizontal direction and the divided hammers may be provided in multiple stages.

When the hammer 11 is divided and provided, the plurality of divided hammers may be provided on the same vertical line, or the plurality of divided hammers may be provided spirally on the circumferential surface of the rotor 10. In either case, a plurality of hammers divided with respect to the rotor 10 are provided in multiple stages. As described above, the hammer 11 is installed according to the type of the crushing material and the rotation speed of the rotor 10 so that the crushing material released from the rotor 10 can be efficiently crushed by the hammer 11. In consideration of the crushing efficiency by YAMANO 11 and NAMOMA 11, the most suitable form is selected from the above.

[0018] (4) Crusher body

As shown in FIG. 1, an annular crushing chamber 21 is formed inside the crusher main body 20 that accommodates the rotor 10 so as to surround the rotor 10.

On the inner periphery of the crusher main body 20 facing the crushing chamber 21, the crushing raw material 30 discharged from the rotor 10 is deposited to form a dead bed 31.

[0019] (5) Crushing method

Next, a crushing method using the centrifugal crusher described above will be described.

As shown in FIG. 1, the centrifugal crusher 10 according to the present invention uses a crushing raw material 30 such as mineral introduced into the central portion of the rotating rotor 10 through the inlet 22 of the crusher main body 20 to centrifuge force. After rolling along the deadrest 32 in the rotor 10 by crushing, the crushing by the tip 16 that also serves as a bit, and the crushing by discharging from each discharge port 15 and colliding with the surrounding dead bed 31 The basic crushing principle is the same as before.

Note that the crushing raw material 30 is discharged through a deadrest 32 formed in the rotor 10. In addition to the case of releasing from 5, it is also possible to release directly from the outlet 15 without going through the dead rest 32.

[0020] As described above, the centrifugal crusher according to the present invention has the hammer 11 provided at a predetermined distance from the rotor 20, and a transmission space is provided between the inside of the hammer 11 and the side of the rotor 10. Is formed.

Therefore, even if the hammer 11 rotates together with the rotor 10, the fan action by the rotor 11 is small.

As a result, the movement of the air in the crushing chamber 21 is reduced, so that a high-speed swirling wind is not generated, equivalent to the rotational speed of the rotor 10 as in the conventional case.

[0021] Even if the rotational speed V of the outermost periphery of the hammer 11 is increased to the same speed as the conventional centrifugal crusher, the present invention

2

Then, the swirl wind generated in the crushing chamber 21 is greatly decelerated.

Accordingly, the impact relative speed between the crushing raw material 30 and the hammer 11 existing in the crushing chamber 21 is increased, so that the hammer 11 collides with the hammer 11 rotating at a high speed and is crushed. In other words, the hammering force of the hammer 11 is not easily relaxed by the swirling wind, so that the crushing raw material can be effectively crushed.

More specifically, the rotational speed of the hammer 11 of the rotor 10 V force is released from each discharge port 15 of the rotor 10.

2

Since the release speed of the crushed material 30 is excellent, the crushed raw material 30 is hit by the hammer 11 and crushed due to this speed difference.

[0022] The driving source 40 such as a motor that rotationally drives the rotor 10 of the centrifugal crusher is compared with the conventional case assuming that the maximum diameter of the hammer 11 is designed to be the same.

In the present invention, the diameter of the rotor 10 can be designed to be smaller than that of the conventional one, so that the rotational torque of the rotor 10 is reduced and the energy consumption is reduced. Can handle with small ability.

In addition, if the diameter of the rotor 10 is reduced, the rotational speed V of the rotor 10 is reduced, so that the rotor

1

The force at which the release speed of the crushed raw material 30 released from 10 decreases. Even if the rotation speed V of the hammer 11 is increased to compensate for this decrease in the release speed, it will remain under the reduced swirl environment

2

Thus, the hammer 11 can be sufficiently compensated for by the damage of the hammer 11, so that the overall performance of the centrifugal crusher can be prevented while reducing the energy consumption of the drive source 40. [0023] (6) Other embodiments

Other embodiments will be described below. In the description, the same parts as those of the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 3 shows another embodiment in which the lower portion of the hammer 11 is extended downward to integrally form the extension portion 11a.

In this example, the extension 11a of the hammer 11 is formed to extend downward from the raw material dropping point P of the dead bed 31 provided around the rotor 10.

The case where the extension 11a is formed by extending the length reaching the bottom of the bottom plate 14 constituting the falling is shown.

In this example, the hitting time of the crushing raw material becomes longer by the extension of the extension 1 la to the hammer 11. In other words, since the extension 11a of the hammer 11 can crush the raw material falling below the raw material dropping point of the dead bed 31, the crushing efficiency is improved as compared with the nonma without the extension 1 la.

[0025] As shown in the figure, when a stationary ring bit 23 is provided on the side of the crusher body 20 around the rotor 10 so as to face the hammer 11, the crushing material collides with the ring bit 23 and is crushed. Therefore, the friability is further improved.

In this example as well, the hammer 11 is provided at a predetermined distance from the rotor 20 to suppress the generation of swirling air in the crushing chamber 21 as in the above-described embodiment.

[0026] Although not shown in the drawings, the present invention can be applied to various known centrifugal crushers as long as it is a crusher having a rotor that rotates about a vertical axis.

As described above, the rotational speed V of the rotor 10 and the rotational speed V of the hammer 11 can be selected as appropriate.

1 2

As described above, for example, the rotational speed V of the rotor 10 of the present invention is set at the mouth of a conventional centrifugal crusher.

1

The rotation speed V of the hammer 11 is approximately equal to the rotation speed of the motor.

2

It may be set larger than the rotation speed of the hammer 11 of the crusher.

Brief Description of Drawings

[0027] FIG. 1 is a longitudinal sectional view of a centrifugal crusher according to the present invention.

[Figure 2] II II cross section in Figure 1

[Fig.3] Enlarged sectional view of a part of another centrifugal crusher with the hammer extended downward 圆 4] Model diagram of conventional centrifugal crusher premised on the present invention Description of symbols

10 Rotor

11 Hammer

15 Outlet

17 ····· Support

20 Crusher body

21 Crushing chamber

26 Outlet

30 Crushed raw material

31 hotbed, bed,

Claims

The scope of the claims

[1] A centrifugal crusher that includes a rotor that rotates about a rotating shaft, and a crusher body that accommodates the rotor and that has a crushing chamber formed therein, and has a hammer projecting around the rotor. A support projecting from the side of the rotor,

A hammer is attached to the support, and a transmission space is formed between the inside of the hammer and the side of the rotor.

Centrifugal crusher.

[2] The centrifugal crusher according to claim 1, wherein a plurality of hammers are attached via a plurality of support members protruding from a side portion of the rotor.

[3] The invention according to claim 1, wherein the hammer has an extension part, and the extension part crushes the raw material falling below the raw material drop point of the dead bed provided around the rotor.

, Centrifugal crusher.

[4] The centrifugal crusher according to claim 1, wherein the hammer has a vertically long striking surface.