JPH0113561Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a vibrating roll crusher in which two rolls are arranged facing each other and rotated at a constant speed in opposite directions, and raw materials such as minerals are crushed between these rolls. Regarding Siya.

BACKGROUND TECHNOLOGY A conventional roll crusher consists of two rolls arranged opposite to each other, the rolls are rotated at a constant speed in opposite directions, and raw materials such as minerals are supplied from a hopper between the rolls. It is crushed between rolls and discharged downward.

Problems that the invention aims to solve This type of roll crusher crushes the raw material between the rolls by devising the roll surface shape and increasing the frictional resistance between the raw material and the roll surface. It is known that the crushing efficiency is not very good. In fact, materials with a high HGI (Hardness of Fracture Index), such as recarburizers, are difficult to crush and require repeated crushing several times, and the fragments tend to be flat, making it difficult to crush vertically or horizontally long pieces. There was a problem that occurred.

This invention not only crushes the raw material between rolls rotating in opposite directions, but also performs impact crushing to efficiently obtain pulverized material with a uniform particle size. The purpose is to provide an efficient roll crusher.

Means for Solving the Problems To achieve this objective, according to the present invention:
To provide a vibratory roll crusher characterized in that at least one of a pair of rolls rotating in opposite directions is a horizontally vibrating roll (hereinafter referred to as a vibrating roll). The Vibro Roll is equipped with two eccentric weight shafts, upper and lower, that rotate at a constant speed in opposite directions.The vertical forces are canceled by the rotation of the eccentric weight shafts, and the Vibro Roll It only vibrates horizontally.

As the pair of rolls rotate, the raw material is crushed between the rolls, and at the same time, a large impact force is applied to the raw material by the horizontal vibration action of the vibratory roll, making it possible to crush even hard raw materials that are difficult to crush. Fine particles can also be efficiently obtained by single-stage crushing.

To explain the drawings, in Figs. 1 to 3, the mechanical device is provided with a positioning drive roll 1 and a movable driven roll 2 that rotate at a constant speed in opposite directions, and a hopper 3 provided on the rolls feeds the mechanical device. The raw material is continuously crushed between rolls and discharged from below. The machine base 5 has bearing blocks 6, 7, for the positional driving roll and the movable driven roll.
8 and 9 are fitted, and the bearing blocks 8 and 9 for the movable rolls are slidably provided. The bearing blocks 8, 9 for the movable rolls are connected to a roll backup device 11 via rubber springs 10 which act in the compression and tension directions. The backup device 11 has a pressure adjustment spring 12 that prevents damage to the machine from abnormal pressure generated between the rolls, and the pressure adjustment is performed by an adjustment screw 13 screwed into the front column 5' of the machine base 5.
This is done by adjusting the amount of compression of the spring 12. After adjustment, the backup device 11 and adjustment screw 13 are connected to respective lock nuts 15 and 14.
is positioned. Bearings 16 are incorporated in the bearing blocks 6 and 7 for the positioning drive rolls, and bearings 16 are incorporated in the bearing blocks 8 for the movable roll, similar to the bearing block 6.
However, the bearing block 9 on the opposite side does not use a bearing and is of a split type, as shown in detail in FIG. The positioning drive roll 1 has a drum 20 fixed to a boss 18 by welding, and is fixed to the drive shaft 17 by locking the boss 18 with a key 19 to the drive shaft 17 passing through the center. A roll tire 21 is fitted into the drum 20 and attached to the drum by a rotation stopper key 22 and an axial positioning ring 23. A large driving sprocket wheel 24 is keyed to one end of the drive shaft 17, and power is transmitted from a roller chain 25 and a small sprocket wheel 26. A yoke 27 is keyed to the other end of the drive shaft 17, and the friction wheel 4 is fixed to it with bolts. On the other hand, the movable roll 2 is a vibratory roll, and the vibratory roll has a drum 29 welded to a cantilever shaft 28, and power is transmitted by bolting to a yoke 27 keyed to the cantilever shaft 28. This is done by means of a friction foil 4 which is in frictional contact with a friction foil 4 of the drive roll. A roll tire 30 is fitted around the outer periphery of the drum 29. The rotation of the roll tire 30 is prevented by a key 22, and its axial position is determined by a ring 23 fixed to the end surface of the drum 29 and a cantilevered shaft. This is done by clamping the roll tire 30 between the drum flange 31 on the opposite side. A stator 32 is located inside the center of the vibroroll, and a stator arm 33 extends on the opposite side of the cantilever shaft 28 and is fixedly supported by a bearing block 9. Stator 32 has a flange 34 bolted to the opposite side of stator arm 33 thereof, which flange 34 is received in the center of cantilever shaft 28 in a bearing 35. A bearing 36 is also fitted between the drum flange 31 and the stator arm 33, allowing the roll to rotate freely.

Inside the stator 32, two eccentric weight shafts 37 and 38 for generating vibrations are arranged vertically and supported by bearings 39 and 40, respectively. Eccentric weight shaft 3
The rotational power of 7 and 38 is from the external motor 42.
The drive gear 47 is transmitted to the V pulley 45 of the shaft 46 via the pulley 43 and the V belt 44, and is fixed to the V pulley 45 through the shaft 46, and the gear 48 that meshes with the drive gear 47.
The signal is then transmitted to one of the eccentric weight shafts 37, and the eccentric weight shafts 37 and 38 rotate at a constant high speed by means of a timing gear 41 which is fixed to these shafts and meshed with each other. Since the eccentric weight shafts 37 and 38 are disposed vertically symmetrically with respect to the center line of the roll axis, the forces in the vertical direction cancel each other out and vibrate only in the horizontal direction.

As shown in FIG. 4, by adjusting the vibration angle of the stator, it is possible to set the vibration direction suitable for the raw material. For this purpose, the roll bearing block 9 has a crack in its upper part, and after setting the vibration direction, the stator arm 33 is fixed to the block 9 with a tightening bolt 49. The vibration angle is set by aligning the zero point of the stator arm 33 with the scale 59 of the bearing block (see FIG. 4).

In FIG. 2 and FIGS. 5 to 7, an adjustment stand 50 is bolted to the center of the window of the machine stand 5, and the clearance between the fixed roll 1 and the movable roll 2 is built into the adjustment stand 50. da gear nut 5
1 is rotated by operating the adjustment worm 54 meshed with this, and a buffer pad 53 is attached to the tip.
Adjustment is made by moving the adjusting bolt 52 attached thereto into and out of the gear nut 51 to displace the bearing blocks 8 and 9. The gear nut 51 is supported by a thrust bearing 55 so that it can be easily operated against axial loads. An intermediate shaft 56 with the aforementioned small sprocket wheel 26 attached to one end is supported on both sides by plummer blocks 57 and has a V-pulley 58 at the other end, which is driven by a main motor (not shown) via a V-belt. It is rotated by The roll 1 is rotated by a sprocket wheel 26, a roller chain 25, and a sprocket wheel 24, and the roll 2 is rotated by friction wheels 4, 4' which have elastic force so as not to interfere with the drive even when there is vibration. It rotates at a constant speed in the opposite direction to the roll 1 due to the frictional contact between the roll 1 and the roll 1. In the above example, one of the pair of rolls was explained as a vibrator roll, but both rolls can also be vibrated.

As mentioned earlier, when the eccentric weight shafts 37 and 38 rotate in the rotating vibratory roll 2, the vibratory roll 2 vibrates in the horizontal direction, and the vibration from the hopper 3 is generated between the rolls 1 and 2. While crushing the raw material, a large impact force is applied to the raw material to crush even hard raw materials that are difficult to crush.

Effects of the invention According to the invention, as a result of the rolls vibrating in the horizontal direction (the vibration direction can be adjusted), the vibrations are transmitted from the rolls to the raw material, and the raw materials are smoothly supplied between the rolls. The apparent density of the raw material directly above the roll increases due to vibration, and at a constant circumferential speed, the processing capacity of the raw material by the roll increases. It is possible to crush hard raw materials that are difficult to crush, and it is also possible to apply vibrations to the rolls at a frequency that is several steps faster than the rotational speed of the rolls. A powder with a uniform particle size can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a vibratory roll crusher according to the present invention. FIG. 2 is a cross-sectional view thereof. FIG. 3 is a sectional view taken along the - line in FIG. 1. FIG. 4 is a side view of one of the roll bearing blocks. FIG. 5 is a front view of the roll clearance adjustment mechanism. FIG. 6 is a sectional view taken along the - line in FIG. 5. FIG. 7 is a sectional view taken along the - line in FIG. 6. 1... Orientation drive roll, 2... Movable driven roll.

Claims (1)

[Scope of utility model registration request] Two upper and lower eccentric weight shafts that rotate at a constant speed in opposite directions are provided inside at least one of a pair of rolls that rotate in opposite directions, and the rotational action of the eccentric weight shafts is A vibratory roll crusher, characterized in that the roll is vibrated in the horizontal direction by: