JPS6125876Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of application) This invention relates to a vertical crusher that has a rotor that rotates at high speed to receive the material to be crushed, a rotating hammer attached to the rotor, and side liners that surround the rotor and are attached to a casing.

(Conventional structure) Such a vertical crusher has a rotary hammer attached radially to a rotor rotating at high speed, and a side liner attached to the inner surface of an outer frame surrounding the rotor and having a vertical crushing surface. The material to be crushed is placed on the rotor and is crushed by impact with the rotating rotary hammer, and is thrown outward by the centrifugal force of the rotary hammer or the rotor to form the side liner. It is made to collide with the crushing surface and be repulsed to cause it to shatter.

In order to improve the crushing capacity of such a crusher, there are ways to increase the rotation speed of the rotor or to reduce the gap between the hammer and the side liner. It is necessary to increase the size of the grinding material, and the impact with the material to be crushed becomes large, resulting in significant wear and troublesome maintenance. Further, reducing the gap between the rotor and the side liner has drawbacks such as design constraints and the need to improve manufacturing and assembly precision.

(Purpose of this proposal) This proposal improves the structure of the side liner, without reducing the gap with the rotor.
The residence time of the material to be crushed in the crushing chamber is increased, and the crushing is repeated to improve the crushing effect.

(Example) This will be explained with reference to an embodiment shown in the drawings.

In the figure, 1 is a base, 2 is an upper casing, and 3 is a lower casing, which are fixed on the base 1. There are multiple numbers 4 and 5 around the upper casing and the lower casing (in this example, there are 4
6 is a support rod that connects the support pieces 4 and 5, 7 is arranged between the upper and lower casings, and is divided into the same number of support rods 6, and supported rotatably by hinge plates 8 and 8. The side plate 9 is engaged with a tightening seat 10 of the side plate 7 using a tightening screw attached to a support rod to hold the side plate in a closed state. 11 is a side liner provided inside the side plate 7;
The upper and lower support protrusions 14 and 15 are inserted and fitted into the notch holes 2 and 13, and the locking plate 16 is fitted into the support protrusion 14 and fixed to the liner support plate 12 with mounting screws 17. Reference numeral 18 denotes an auxiliary liner attached to a support arm 19 fixed to the side plate 7 and provided close to the lower part of the side liner 11, and has an upward slope 18a projecting inward from the inner surface of the side liner 11. 20 is a rotating shaft, 21 is a rotor, and 22 is a rotating hammer that is attached to the upper surface of the rotor 21 in the radial direction, and the protrusion 23 provided on the upper surface of the rotor is fitted into the recessed hole 24 on the lower surface of the rotating hammer, and is secured by tightening with a mounting screw 25. I've let it happen. 2
Reference numeral 6 denotes an auxiliary hammer, which extends downward from the rotor surface so as to face the auxiliary liner 18 on the outer peripheral edge of the rotor 21, and is fixed with a tightening pin 27. 28
29 is a drive motor; 30 is an input port for the material to be crushed;
is a belt, and 31 is a belt cover.

Loosen the tightening screws 9 that fixed the side plate 7, remove it from the tightening seat 10, rotate the side plate 7 outward about the support rod 6 using the hinge plate 8, and remove the liner support plates 12 and 13 inside the side plate. The side liner 11 is attached to the side liner 11, the locking plate 16 is covered and fixed with the mounting screw 17, and the auxiliary liner 18 is attached to the support arm 19. The rotary hammer 22 and the auxiliary hammer 26 are attached to the rotor 21 through the opening of the side plate 7, and the side plate 7 is closed.

The auxiliary liner 18 is formed into an annular shape that is divided and attached to each side plate, and has a chevron-shaped fractured surface on its inner surface like the side liner, and its top is located between the tops of the fractured surfaces of the side liner 11. However, the inner circumferential surface may be formed into a flat annular shape with only an upward slope facing above the rotor, or may be formed integrally with the side liner.

(Operation) When the drive motor 29 rotates the rotating shaft 20 via the belt 30, the rotor 21 rotates at high speed. When a material to be crushed is fed onto the rotor 21 from the input port 28, the material hits the rotating hammer 22 and is crushed by impact and is blown away, or is blown outward onto the rotor 21 by centrifugal force. The pieces collide with the crushing surface of the side liner 11, are bounced back onto the rotor, are crushed repeatedly, and fall downward through the gap between the rotary hammer 22 and the side liner 11.

However, the unpulverized material that is blown downward through the side liner 11 or blown downward from the rotor 21 or the rotary hammer 22 hits the crushing surface of the auxiliary liner 18 and is pulverized. At the same time, it is bounced upward again by the slope 18a and is crushed by the auxiliary hammer 26, or returned onto the rotor 21 and further crushed.

The powder, which has been crushed and whose rebound force due to collision is reduced, falls downward through the gap.

(Effects of the present invention) In this way, the present invention is provided with an auxiliary liner that is provided below the rotor surface of the side liner, protrudes inward from the inner peripheral surface of the side liner, and has an upwardly sloped surface toward the rotor upper surface. Therefore, among the objects to be crushed that try to fall downward from the rotor surface,
The particles that have not yet been sufficiently crushed are bounced upward against the inclined surface of the auxiliary liner and returned to the crushing chamber on the rotor, where they remain for a longer time, resulting in repeated crushing action. It is then finely ground. In addition, if the distance between the auxiliary liner and the rotor is large, more effective pulverization can be achieved by installing an auxiliary hammer that extends below the rotor surface to cause the pulverization to bounce back to the top of the rotor due to the impact. .

Therefore, in this case, even without reducing the gap between the side liner and the rotary hammer, the material to be crushed can be bounced off the slope of the auxiliary liner and the residence time in the crushing chamber can be extended, improving the crushing effect. In addition, since high precision is not required for manufacturing and assembling, assembly can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, and a portion thereof is shown in cross section. FIG. 2 is an enlarged side cross-sectional view of the main part, and FIG. 3 is a partially cutaway top view thereof. 1 is a base, 2 is an upper casing, 3 is a lower casing, 6 is a support rod, 7 is a side plate, 11 is a side liner, 12 and 13 are liner support plates, 18 is an auxiliary liner, 18a is a slope, 19 is a support arm, 20
21 is a rotating shaft, 21 is a rotor, 22 is a rotating hammer, 26 is an auxiliary hammer, and 28 is an input port.

Claims (1)

[Claims for Utility Model Registration] (1) In a vertical crusher in which a rotor and a rotary hammer are provided on the rotating shaft, and a side liner having a crushing surface is attached to the inner periphery of the outer frame surrounding the rotor, the side liner Projects downward from the rotor surface and inward from the inner peripheral surface of the side liner,
A vertical crusher characterized by having an auxiliary liner with an upward slope above the rotor. (2) The vertical crusher according to claim 1, wherein the auxiliary liner has a crushing surface similar to that of the side liner. (3) the rotor extends below a rotor surface;
The vertical crusher according to claim 1 or 2, which is provided with an auxiliary liner and an auxiliary hammer facing the auxiliary liner.