JP2001009317A - Pulverizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pulverizer smoothly discharging a raw material to a pulverizing means. SOLUTION: In a pulverizer, a plurality of liner projection parts formed in a rotor slidingly come in contact with a plurality of liner edges 42 formed to a hole part 28 by rotation of the rotor in the hole part 28 of a housing, 30 a raw material such as chaff or the like is pulverized and discharged from a discharge opening 40. In this case, the edge 42 is formed in a linear state wherein it reaches a peripheral edge part of the discharge opening 40 and does not pass through the center of the discharge opening, an angle made by a central line leaching to one point on the edge 42 from a rotary center (a center of the discharge opening 40) and the edge 42, increases toward the discharge opening 40. Therefore, in the pulverizer, since an extrusion force acting on the chaff by rotation of the rotor is increased toward the discharge opening 40, the chaff compressed toward the discharge opening 40 can be smoothly discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher for crushing a raw material by rotating a rotor in a hole in a housing.

[0002]

2. Description of the Related Art In order to use rice husks and sawdust as biomass, apparatuses for crushing rice husks have been developed. For example, the structure of rice hulls is destroyed by crushing, and the rice husks are regenerated as a material having excellent properties of water absorption, water retention, and air permeability. For example, agriculture, animal husbandry,
It can be used in fields such as industry.

FIGS. 7 and 8 show a conventional example of such a pulverizing apparatus. As shown in FIG. 7, a bell-shaped hole 3 is formed inside a housing 2 constituting the crushing device 1, and a spiral blade 5 is formed on an inner peripheral surface thereof toward a discharge port 4.
And a plurality of concave portions 8 (see FIG. 8) are formed at predetermined intervals. On the other hand, as shown in FIG. 7, the rotor 6 disposed in the hole 3 of the housing 2 has a convex portion 7 and a concave portion 9 which are spirally formed on the outer peripheral surface in a direction opposite to the blade 5 of the housing 2 at a predetermined interval. Are formed. Therefore, in the crushing apparatus 1, the raw material, for example, the rice hull is supplied from the supply path 11 to the hole 3, and the blade 5 of the housing 2 and the projection 7 of the rotor 6 slide with the rotation of the rotor 6, whereby the rice hull is reduced. The crushed rice hulls are guided to the recesses 8 and 9 and crushed, and are discharged to the outside from the outlet 4.

[0004]

The pulverizing apparatus 1
Then, the rice husks are compressed because the cross-sectional area of the hole 3 of the housing 2 decreases as approaching the outlet 4. Therefore, a greater pushing force is required to discharge the crushed rice hulls as the outlet 4 is approached. Here, the pushing force acting on the rice hull is correlated with the angle θ formed between the center line CL crossing the center C of the outlet 4 and one point of the blade 5 and the tangent of the blade 5 in the housing 2 (see FIG. 6A). ). Generally, the greater the angle θ, the greater the pushing force. That is,
The larger the angle θ, the easier the crushed rice hull is to slide along the blade 5, and the greater the force of going out of the discharge port 4.

However, since the blade 5 of the housing 2 is formed spirally toward the discharge port 4 when viewed from the direction of the rotation axis of the rotor 6 (see FIG. 8), the blade 5 of the rotation shaft (discharge port 4) is formed. The angle θ between the center line CL connecting the center C and one point of the blade 5 and the tangent of the blade 5 is substantially constant. As shown in FIG. 6 (A), two points on the blade 5 are taken and their angles θ1 and θ2 are taken.
Are almost unchanged (θ1 す る と θ2). Therefore, in the crushing apparatus 1, the pushing force acting on the rice hull does not greatly change (increase) as approaching the discharge port 4, and the disadvantage that the compressed rice hull cannot be discharged smoothly from the discharge port 4. there were.

The present invention has been made in consideration of the above-described circumstances, and has as its object to provide a pulverizing apparatus capable of smoothly discharging pulverized raw materials.

[0007]

According to the first aspect of the present invention, the mortar-shaped hole is formed as a whole, a discharge port is formed at the bottom of the mortar-shaped hole, and the inner peripheral surface of the mortar-shaped hole is formed. A housing having a plurality of blades formed thereon, and a rotor disposed in a mortar-shaped hole of the housing and having a plurality of protrusions formed on an outer peripheral surface, and supplied between the housing and the rotor. Raw material is crushed by rotation of the rotor, in a crushing device that discharges from the discharge port, the blade of the housing is viewed along the rotation axis direction of the rotor, and reaches the peripheral edge of the discharge port, and It is characterized by being formed in a straight line that does not pass through the center of the outlet.

The operation of the first aspect of the present invention will be described.

Since the blade formed on the housing is formed in a straight line extending along the rotation axis direction of the rotor and reaching the periphery of the outlet and not passing through the center of the outlet, the blade is formed in a straight line. The angle (inclination angle) θ between the center line connecting the (rotation center axis of the rotor) and one point of the blade and the blade increases toward the discharge port (see FIG. 6B). Therefore, the pushing force acting on the raw material by the rotation of the rotor in the hole of the housing increases toward the discharge port. As a result, the raw material compressed toward the outlet can be smoothly discharged from the outlet.

When viewed along the direction of the rotation axis of the rotor,
When the blade is formed linearly toward the center of the discharge port, the inclination angle θ is constant (θ = 0), the pushing force does not increase toward the discharge port, and the compressed raw material is discharged smoothly. Can not do it.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A crushing apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view showing the entire configuration of the crusher, FIG. 2 is a cross-sectional view of a main part of the crusher, FIG. 3 is a cross-sectional view of a main part of a housing, FIG. 4 is a rear view of the housing, FIGS. 5A and 5B are side views of the rotor, and FIGS.
FIG. 5 is an explanatory diagram showing a relationship between a blade and a twist angle or an inclination angle in the embodiment.

As shown in FIG. 1, the crushing apparatus 10 basically comprises a supply means 12 for supplying a raw material and a crushing means 14 for crushing the supplied raw material.

The supply means 12 comprises a conveyor 20 for transporting raw materials, a chute 24 for guiding the upper end of the conveyor 20 to a hopper 22, and a hopper 22 for storing raw materials. At the lower end of the hopper 22, an impeller (not shown) that is rotated by the driving force of the motor 26 is provided.
By changing the rotation amount of the impeller, the crushing means 14 is changed.
Adjust the feed rate of raw materials to the system.

As shown in FIG. 2, the crushing means 14 includes a housing 30 having a bell-shaped (mortar-shaped) hole 28.
And a rotor 32 that rotates in the hole 28.

As shown in FIG. 5, the rotor 32 is formed in a substantially bell-shaped shape, and has a spiral convex portion 46 on its outer peripheral surface.
A plurality of recesses 48 are formed at predetermined intervals. This rotor 32 is, as shown in FIG.
And a screw 36 for discharge is screwed on the opposite side to the shaft 34. Therefore, the rotor 32 and the screw 36
Are integrally rotated by the drive of the motor 26.

The housing 30 has a mortar-shaped hole 28.
A discharge port 40 having a circular cross-section for discharging the pulverized raw material to the outside is formed at the bottom surface position, and a supply hole 38 communicating with the hopper 22 is formed on the side of the discharge port 40 opposite to the rotation axis direction of the rotor 32. ing.

As shown in FIGS. 3 and 4, the hole 28 of the housing 30 has a projection (hereinafter referred to as a blade) 4.
2 and a plurality of concave portions 44 are formed at a predetermined interval.
In FIG. 3, when the hole 28 (inner peripheral surface) of the housing 30 is viewed from the arrow A direction, the blade 42 is formed linearly so as to substantially circumscribe the outer periphery of the outlet 40 from the outer peripheral side (supply side). ing. Accordingly, as shown in FIG. 6B, the center line CL connecting the center C of the discharge port 40 and one point of the blade 42 and the blade 42
Is defined as θ (hereinafter, referred to as the inclination angle θ), the inclination angle θ increases as approaching the discharge port 40 (θ3
<Θ4) Configuration. Here, in general, when the inclination angle θ increases, the pushing force acting on the rice husk increases.

As described above, since the housing 30 and the rotor 32 are configured, the rotation of the rotor 32 causes the rotor 32 to rotate with respect to the blade 42 of the housing 30.
The protrusion 46 slides, and crushes the raw material supplied to the hole 28.

The operation of the crushing apparatus 10 having the above-described structure will be described.

In the pulverizer 10, raw materials having a moisture content of about 10 to 13% dried at the lower end portion of the conveyor 20 are loaded with, for example, rice hulls.
0 is supplied to the hopper 22 through the chute 24 from the upper end, and the supply amount is adjusted by the impeller.
4 is supplied.

The rice hull supplied from the supply hole 38 to the hole 28 by the crushing means 14 is crushed by the protrusion 46 of the rotor 32 rotating together with the shaft 34 sliding on the blade 42 of the housing 30. Then, it is guided by the concave portion 44 of the housing 30 and the concave portion 48 of the rotor 32 and moves toward the discharge port 40. The crushed chaff that has reached the discharge port 40 is discharged to the outside by the screw 36.

At this time, since the cross-sectional area of the mortar-shaped hole 28 decreases toward the discharge port 40, the rice hulls are compressed, and the crushed rice hulls are discharged as approaching the discharge port 40. Requires a large extrusion force. here,
The blade 42 formed in the housing 30 is formed in a straight line that reaches the peripheral portion of the outlet 40 and does not pass through the center of the outlet 40 when viewed from the rotation axis direction. Increase towards. Therefore, the outlet 40
As it approaches, the pushing force acting on the rice husk increases,
The compressed chaff can be smoothly discharged from the discharge port 40.

[0023]

According to the present invention, the blade of the housing is formed in a straight line extending along the rotation axis of the rotor to reach the periphery of the outlet and not passing through the center of the outlet. The angle between the blade and the center line intersecting one point of the blade increases toward the outlet. Therefore, the pushing force acting on the raw material increases with the rotation of the rotor toward the discharge port, and the compressed raw material can be discharged smoothly.

Further, since the blade of the housing is formed in a linear shape when viewed along the rotation axis direction, the structure of the housing is simplified, and the manufacturing cost is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a crusher according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of a crusher according to one embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a main part of the housing according to the embodiment.

FIG. 4 is a rear view of the housing according to the embodiment.

FIG. 5 is a side view of the rotor according to the present embodiment.

FIG. 6A is an explanatory diagram showing a relationship between a shape of a blade and a torsion angle as viewed from a rotation axis direction in a conventional example, and FIG.
FIG. 4 is an explanatory diagram showing a relationship between a blade shape and a tilt angle as viewed from a rotation axis direction in the present embodiment.

FIG. 7 is a longitudinal sectional view of a main part of a crusher according to a conventional example.

FIG. 8 is a rear view of a housing according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Crusher 28 Hole part (mortar-shaped hole part) 30 Housing 32 Rotor 40 Discharge port 42 Blade 46 Convex part

Claims (1)

[Claims] A housing having a mortar shape as a whole, a discharge port formed on a bottom surface of the mortar-shaped hole portion, and a plurality of blades formed on an inner peripheral surface of the mortar-shaped hole portion; A rotor disposed in a mortar-shaped hole portion of the housing and having a plurality of convex portions formed on an outer peripheral surface thereof, comprising: a raw material supplied between the housing and the rotor;
A crusher that crushes by rotating the rotor and discharges from the discharge port, wherein the blade of the housing is viewed along the rotation axis direction of the rotor, reaches a peripheral portion of the discharge port, and the discharge port A crusher formed in a straight line that does not pass through the center of the crusher.