JPH09323045A - Rotor of repulsive pulverizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new rotor for a pulverizer in which impact bars are easily replaced and turned inside out, and the impact bars are rigidly and precisely tightexned in a housing part, and accordingly the impact bars are made of an extremely hard alloy. SOLUTION: A fixing device has two load dispersion bars 28, 30 housed in a housing part 12 on both the sides of each impact bar 14 and extending along the total length of an impact bar 14. One load dispersing bar 28 is combined with a device for positioning the impact bar 14 in the axis line direction and in the radial direction, and the other load dispersing bar 30 has a longitudinal groove 52, and into the longitudinal groove 52, a series of fixed blocks 50 are inserted by sliding to gradually tighten the fixed blocks 50 by a tightening wedge 58 movable in the direction having a component in the radial direction and a component in the tangential direction to the diameter surface of a rotor.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a rebound crusher (rebound
crusher) rotors, in particular a series of discs fixed to a rotating spindle and a longitudinal extension that radially projects with respect to the discs housed in openings aligned in line with the outer circumference of each disc. The present invention relates to a rotor composed of a series of symmetric blow bars and a fixing means for removably holding the impact bar in the housing.

[0002]

2. Description of the Related Art Crushers of this type are widely used, for example, for crushing rocks and recycling waste. The substance to be crushed is supplied to a rotor driven around a rotary spindle, collides with a collision bar to be pulverized, or is thrown onto the screen by the rotor and pulverized. Due to the high impact forces transmitted to the collision bar, the collision bar wears rapidly and must be replaced quite often. In order to reduce the impact bar replacement frequency by half, it is known to use a symmetrically shaped impact bar for turning over when the attack surface is worn.

Patent document AT-B-351,906 describes a rotor with a symmetrical impact bar which can be turned inside out when one of the attack surfaces is worn. This symmetrical impact bar has two symmetrical grooves of round cross section on the front side and the rear side, the rear side is held by a round rod and the front side wedges on the sharp nose forming the outer edge of the housing. It is held by a shoe fixed at. The impact bar is not fixed to the rigid body, but swings around the holding shoe and the round rod, and is stopped at a predetermined position by centrifugal force. Since the impact bar is not rigidly fixed, it must be made of a relatively ductile material such as steel or manganese steel. As a result, wear resistance is sacrificed. Further, since the impact bar can be detached only in the tangential direction from the wedged protrusion, the impact bar must be pulled out from the rotor in the axial direction when the impact bar is turned over, that is, when the impact bar is replaced. This is often an obstacle.

The rotor described in Patent Document DE-A-2,147,920 is fixed by a detachable shoe so that the impact bar can be removed in the radial direction. But,
Since this impact bar is not symmetrical, it has the disadvantage that the impact bar cannot be turned inside out when the attack surface wears. Moreover, since the impact bar is not rigidly fixed, it is not possible to use a material having optimum wear resistance.

Rotors are also known which have a locking device with a single shoe extending along the entire length of the impact bar. Although this fixing device can bring the impact bar into exact contact with the bearing surface, it does not guarantee a complete and even contact along the entire length of the impact bar. It should be remembered that the impact bar is a cast part that has only been rough cut and not machined, and is not necessarily straight, but rather distorted to some extent. Therefore, the impact bar only comes into contact with the bearing surface or the clamping surface at some points and not at other points, which considerably increases the risk of breaking the impact bar.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to easily replace and turn over the impact bar, and yet the impact bar can be rigidly and precisely clamped in the housing, and therefore impacted with an extremely hard alloy. It is to provide a new rotor of a crusher capable of making a bar.

[0007]

In order to achieve the above object, the fixing device for a rotor provided by the present invention has two load distribution bars, and the load distribution bars are provided on both sides of each impact bar in the housing. Is located and extends along the entire length of the impact bar,
One load distribution bar is combined with a device for axial and radial positioning of the impact bar, the other load distribution bar has a flute and a series of fixed blocks are slid into this flute and introduced. The fixed block is characterized in that it is gradually tightened by a tightening wedge in a direction having a radial component and a tangential component with respect to the diametrical surface of the rotor.

[0008]

Since the impact bar fixing device of the present invention can rigidly connect the impact bar and the rotor, the impact bar can be made of an extremely hard alloy. Since the present invention tightens each fixed block individually, the impact bar is fully retained and tightened along its entire length. The inner surface of each load distribution bar is preferably covered with a removable wear strip that provides a perfectly flat bearing surface along the entire length of the shock bar for accurate shock reception and transmission. The strip can be replaced when worn and does not require replacement of the load distribution bar.

The axial and radial positioning devices can consist of two cylindrical pegs screwed to both ends of the load distribution bar. Each cylindrical peg extends longitudinally within the corresponding housing of the load distribution bar and the impact bar. Each fixed block has on the outside a runner block with an inverted cross section that engages the longitudinal groove of the bar, and on the inside it has an inclined sliding surface on which the inclination of the clamping wedge is slidably mounted. Preferably, a surface is attached and the opposite side of the clamping wedge is flat, the base of which is slidably engaged with the shoe, which shoe is connected to the fixing block by a clamping screw.

The sliding surface of the fixing block preferably has a dovetail cross section, so that the lateral edge surfaces of the clamping wedge are preferably chamfered. A machined pad having two planes facing each other in the center of each impact bar, each plane abutting the plane of the clamping wedge on one side and the load-balancing bar and its wear strips on the other side; It is preferred to have strips. This thin strip or pad has a completely flat surface on the impact bar side,
It serves to hold the impact bar along its entire length. Other features and advantages of the present invention will become apparent from the following description of embodiments with reference to the accompanying drawings. However, these examples do not limit the present invention at all.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The rotor shown in FIG. 1 comprises a series of discs 10, each disc 10 fixed to a central spindle (not shown). This central spindle is driven by a suitable motor to rotate the entire disk 10. A plurality of recesses, that is, accommodating portions 12 are formed on the outer peripheral edge of each disk 10. Each accommodating portion 12 is vertically aligned with each other,
A shock bar 14 as shown in FIG. 2 is housed in the row of each housing 12. The impact bar 14 collides with the object to be crushed when the rotor rotates.

As can be seen from FIG. 2, each impact bar 14 has a symmetrical shape with respect to the radial plane of the rotor and has two symmetrical attack surfaces 16, 18. When the attack surface 16 of the impact bar 14 is worn, for example, the impact bar 14 can be turned over and the attack surface 18 can be used to continue the crushing operation. The impact bar is formed with two flat sides 20, 22 opposite each other in the middle between these two attack surfaces 16, 18. Attack edges 16, 18 are flanked by these flanks 20, 22
Slightly inclined with respect to, the impact bar has an extended S-shaped cross section.

A machined shaft fulcrum is provided on each of the two side faces 20, 22 of each impact bar 14. This pivot point is
It can be in the form of a discrete pad as shown at 24 or as an elongated strip as shown at 26, or a combination thereof. These pads 24 or strips
26 forms a perfectly flat bearing surface, and it is not necessary to cut the entire surface of the sides 20, 22.

As shown in FIG. 1, the accommodating portion 12 of the impact bar 14 is shown.
It is lined by load distribution bars 28, 30 in the lateral direction. Each load distribution bar 28, 30 extends along the entire length of the rotor and is fixed to the disk 10 by, for example, welding.
The bars 28 and 30 are for distributing the load generated by the tightening force of the impact bar 14 and the impact during operation to the entire disk 10 and the rotor.

The inner bearing surface must be perfectly flat, and in order to avoid having to replace the load-balancing bars 28 and 30 in their entirety when they become worn, The inner surface of 30 is coated with wear strips 32, 34. The wear strips 32, 34 are screwed to the load distribution bar and serve as a bearing surface for the impact bar 14 and its fixing block. The wear strips 32, 34 are subjected to shock and load and transfer it to the load distribution bars 28, 30 so that they can be easily replaced when worn.

One of the load distribution bars (bar 28 in the illustrated embodiment) is associated with means for axial and radial positioning of the impact bar 14. The means comprises a load distribution bar 28 and two cylindrical pegs 36 which engage corresponding half-cylindrical housings on opposite ends of the wear strip 32. Each cylindrical peg 36 has an enlarged head 38,
Are fixed on both sides of the load distribution bar 28 using, for example, screws 40.

In this part, the semi-cylindrical accommodating portion 42 corresponding to the cylindrical peg 36 is formed on each side surface 20, 22 of the impact bar 14 and at both ends.
(See FIG. 2) and a wide semi-cylindrical accommodating portion 44 (see FIG. 3) corresponding to the enlarged head portion 38 of the cylindrical peg 36 are formed. Therefore, the radial position of the impact bar 14 with respect to the load distribution bar 28 is the cylindrical peg 36, the enlarged head 38, and the load distribution bar 28.
And completely defined by the housing of the impact bar 14.
The enlarged head 38 of the cylindrical peg 36 also defines the axial position of the impact bar with respect to the rotor. This radial and axial positioning makes mounting of the impact bar extremely easy and yet provides safety against the risk of disengagement due to centrifugal forces during operation.

A tangential tightening / fixing device (see FIG. 3) is provided on the opposite side of the impact bar 14 from the radial and axial positioning sides. In the illustrated embodiment, the rotor and impact bar rotate clockwise. In other words, the positioning means for the impact bar is at the rear when viewed in the direction of rotation,
The tangential tightening and fastening device is in front of it. The advantage of such an arrangement lies in the fact that the load distribution bar 28 behind the impact bar 14 preferably provides a large surface area for pivot support and shock absorption, but the reverse, i.e. the positioning means in front of the impact bar 14. A tangential tightening / fixing device can also be installed at the rear.

FIG. 4 is a perspective view of an example of a tangential tightening / fixing device. This fixing is performed by a series of fixing blocks 50 (see FIG. 1). The number of blocks 50 can be changed according to the application. The greater the number of fixed blocks, the better the fixing / coupling between the impact bar 14 and the rotor. Conversely, the smaller the number of fixed blocks 50,
The impact bar can be attached and detached quickly.

As can be seen from FIG. 1, each fixed block 50
Are slidably engaged in the flutes 52 of the square cross section of the load distribution bar 30. Therefore, each fixed block 50 has a runner block 54 on the rear surface, which has a cross-sectional shape opposite to that of the vertical groove 52. A sliding surface 56 is formed on the front surface (see FIG. 4) of each fixed block 50. This sliding surface 56 is a fixed block 50
The sliding surface is inclined with respect to the diametrical surface of the rotor so that the sliding surface approaches the impact bar 14 outside the inside of the housing 12 when in the home position.

The sliding surface 56 includes a flat front surface 60 and a rear surface 62 having the same inclination with respect to the plane 60 as the sliding surface 56.
(See FIG. 3) are engaged by a clamping wedge 58. Therefore, when the clamping wedge 58 slides in the sliding surface 56, its front surface 60 moves parallel to the impact bar due to the tangential component.

In order to maintain the connection between the fixing block 50 and the clamping wedge 58, in particular the engagement during installation and removal, in the embodiment shown, the lateral edges 56a of the sliding surface 56,
Inclining 56b and making the sliding surface 56 a dovetail cross section,
Inclined protrusions are provided corresponding to the longitudinal side edges 58a of the tightening wedge 58. It should be noted that a shape other than the above, which prevents the two parts from coming off in the lateral direction, such as a hammer head, may be used.

The base of the tightening wedge 58 is a tightening bolt.
It is engaged in a lateral sliding motion with a shoe 62 connectable to the fixed block 50 by 64, 66. When the two bolts are tightened, the shoe 62 causes the wedge 60 to slide within the sliding surface 56, and the tightening wedge 58 has a component that moves in the tangential direction of the rotor. The shoe must maintain alignment with the fixed block 50 due to the bolts 64, 66, so that the wedge 60 sliding within the fixed block 50 will result in a tightening wedge.
Relative sliding movement occurs between 58 and shoe 62. To facilitate sliding, the base of the clamping wedge 58 and the contact surface of the shoe 62 opposite the sliding surface 56 are sloped so that the relative movement between the clamping wedge 58 and the shoe 62 is relative to this relative movement. It may not be at right angles to the force generated by the movement, that is, the force generated when the bolts 64 and 66 are tightened.

When the impact bar 14 is mounted, the rotor is rotated to a predetermined angle position so that the storage portion of the impact bar is at the 9 o'clock position, for example. Next, the positioning peg 36 held by the fixing screw 40 is attached. Then the shock bar
14 is engaged with the receiving portion in the radial direction and abuts on the strip 32. Accurate positioning can be achieved by tightening the screw 40 of the positioning peg. The desired number of fixed blocks 50 are then loosened and slid over the impact bars 14 into the flutes 52 of the load distribution bar 30 and preferably accurately and evenly aligned in the longitudinal direction. Then each fixed block
Tighten the bolts 64 and 66 of 50 and slide the tightening wedge 58 on the sliding surface.
The inside of 56 is slid, and the pad 24 or strip 26 that has been machined is clamped and moved in a tangential direction toward the impact bar 14 direction. When all the fixing blocks 50 are securely tightened, the impact bar 14 is rigidly anchored in the receiving part along the entire length, rigidly and uniformly connected to the rotor.

When removing the impact bar, the same operations as above are performed in the reverse order. However, the bolts 64, 66 of the fixed block 50
After loosening the head, hit the head with a hammer and
You'll need to remove the 58. If the stain is
The bolt between 62 and the fixed block 50 can be cut. It will also be appreciated that the fixed block 50 has the advantage of being easily accessible for tightening or loosening the bolts 64, 66.

[Brief description of drawings]

FIG. 1 is a projection view of a rotor portion in a storage unit with an impact bar removed.

FIG. 2 is a projected view of an impact bar.

FIG. 3 is an axial direction view of the impact bar fixed to the accommodation portion.

FIG. 4 is a perspective view of a fixed block of an impact bar.

[Explanation of symbols]

10 Disc 12 Housing 14 Impact bar 20, 22 Side 24 Cutting pad 26 Strip 28, 30 Load distribution bar 32, 34 Wear strip 36 Peg 50 Fixed block 52 Vertical groove 54 Runner block 56 Sliding surface 58 Wedge 58a Inclined notch 60 Face 64, 66 Tightening screw

Claims (8)

[Claims] 1. A series of discs (10) fixed to a rotary spindle and a storage part (12) opened at the outer periphery of the discs (10) are arranged in a radial direction from the discs (10). Multiple vertically extending symmetrically shaped impact bars (14)
In a rotor of a repulsion crusher having a shock absorber (14) and a fixing device that detachably holds the shock bar (14) in the accommodating part (12), a fixing device is provided on both sides of each impact bar (14). ) And has two load distribution bars (28, 30) extending along the entire length of the impact bar (14), one load distribution bar (28) axially and radially radiating the impact bar (14). Combined with a directional positioning device, the other load distribution bar (30) has a flute (52) into which a series of fixed blocks
(50) is inserted by sliding, and the fixed block is gradually tightened by a tightening wedge (58) movable in a direction having a radial component and a tangential component with respect to the rotor diametral surface. And the rotor. 2. A rotor according to claim 1, wherein the inner surface of each load distribution bar (28, 30) is coated with a removable wear strip (32, 34). 3. The axial and radial positioning device is composed of two cylindrical pegs (36), which are screwed to opposite ends of the load distribution (28) to provide load distribution (28). A rotor according to claim 1, which extends longitudinally into the corresponding housing of the impact bar (14). 4. Each fixed block (50) has a vertical groove (5) on the bar (30).
2) has a runner block (54) with an inverted cross section that engages with 2) on the outside, and has an inclined sliding surface (56) on the inside.
The slanting surface of the tightening wedge (58) is attached to (56), the opposite surface (60) of the tightening wedge (58) is flat, and its base is slidable. A rotor as claimed in claim 1, wherein said rotor engages with a shoe (62), said shoe (62) being connected to a fixed block (50) by means of tightening screws (64, 66). 5. The sliding surface (56) of the fixed block (50) has a dovetail-like cross section, so that the transverse edge (58a) of the clamping wedge (58) is chamfered. Rotor. 6. The impact bar (14) has two planes (20, 22) facing each other at the center thereof, and each plane (20, 22) is a plane (60) of a tightening wedge (58) on one side. ) And a machined pad (24) or strip (26) which abuts the load distribution bar (28) and its wear strip (32) on the opposite side. The described rotor. 7. The rotor according to claim 1, wherein the fixed block (50) is located in front of the impact bar (14) when viewed from the rotational direction. 8. A rotor according to claim 1, wherein the fixed block (50) is rearward in the direction of rotation of the impact bar (14).