FI72892B - KROSSNINGSANORDNING. - Google Patents

Description

Crushing plant - 72 8 9 2

Krossningsanordning

The invention relates to a crushing apparatus according to the preamble of claim 1.

In a known crushing plant (cf. H. Schubert: Aufbereitung fester mineralischer Rohstoffe, Bd I, 2.

Auf 1., Leipzig 1968: VEB Deutscher Verlag fiir Grund-stoffIndustrie, p. In this apparatus, the rotor does not have the possibility to deviate to bypass larger non-crushable pieces in the material, such as pieces of stone, iron and wood. However, in the presence of such pieces, there is a risk of clogging, especially with a large supply of material, and even rotor damage and blockages.

The invention is based on the object of providing a crushing apparatus of the above-mentioned type for soft to medium-hard material, in which the through gap between the rotor and the counter-tool can be easily changed and in which larger non-crushing parts can pass without hindrance.

This object is solved by the features mentioned in claim 1. Due to its considerable own weight, the rotor generally hangs substantially below the pivot axis and has a predetermined distance to the counter-tool. In the presence of larger, non-crushing pieces, the pivot frame can move with the rotor, causing the rotor weight to act as a return force and return the rotor to its original position.

In order to prevent the rotor from hitting the counter-tool after the displacement, the crushing equipment is equipped with 2 72892 restricting devices. These limiting devices can be used to adjust the smallest gap between the rotor and the counter tool. This can be done in particular in such a way that the pivot frame rests on the restraining devices outside the lower position.

To avoid unnecessary stresses, the restraint devices are equipped with damping elements. In order to increase the restoring force, the pivot frame of the crushing apparatus is connected to the devices according to claim 2.

Other possibilities for adjusting the gap between the rotor and the counter-tool and thus achieving a certain final gap are obtained by forming a crushing device according to claim 3 and / or 4.

Upon leaving the feed belt, the feed material falls on a counter-tool, where it is subjected to pre-crushing caused by the kinetic energy changed due to the collision. By forming a counter-tool according to claim 5, both a better crushing effect and also a better retraction effect in the area of the rotor are achieved.

Embodiments of the subject of the invention are shown in the drawing and will be described in more detail below. The figures show

Figure 1 is a simplified view of a crushing apparatus comprising a feed roller and a four-arm rotor suspended from a pivot frame;

Fig. 2 is a turning frame in which the rotor is shown in an enlarged cross-section along the line II-II in Fig. 1,

Fig. 3 is a partial section of the pivot frame and the rotor drive apparatus along the line III-III in Fig. 2;

Figure 4 is a side view of the height adjustment device of the pivot axis of the pivot frame, 72892

Fig. 5 is a plan view for changing the position of the pivot axis in the horizontal direction,

Figure 6 is a side view of a feed roller with profiled plates,

Fig. 7 is a feed roller with strips arranged transversely on the surface, and

Figure 8 shows a feed roller with protrusions on its surface.

Below the feed belt 1 there is a feed or crushing space 2 of the crushing apparatus with a feed roller 3 and a rotor 4.

The feed roller 3 is coated on its surface with smooth wear plates 11. It is driven by a motor (not shown) so that its always upward surface is moved in the direction of the rotor 4. On the side away from the rotor, a downcomer 12 is introduced above the roller 3, which prevents the feed material from "escaping" before the rotor. In order to increase the grip, the surface of the roll 3 may be provided with profiled wear plates 13 (Fig. 6), strips 14 extending over the entire width of the roll (Fig. 7) and / or individual projections 15 (Fig. 6).

8).

The rotor 4 is formed in four arms, the arms 16 being formed by individual segment plates 17, between the free ends of which the impact tools 18 are mounted on the sleeves 19 articulated. The sleeves 19 are then at the same distance from the axis of rotation 20 of the rotor 4 and parallel to it (20). In a variant of the described embodiment, the rotor 4 can also be formed as a six-arm, depending on the application.

The entire rotor 4 hangs in a U-shaped pivot frame 5 formed by two laterally supported supports 22 and stiffening plates 23 or 24 arranged horizontally and perpendicularly. , and which bears at both ends the bearing housings 27.

The bearing housings 27 are each between two vertical guides 28 and their height determines and holds the arch support 29.

The arch supports 29 have two arc portions 30, 31 which are held together by connecting portions 32. The actual arcs of the arc portions 30, 31 are straight and run obliquely. They are provided with wear strips 33. The lower curved part 31 has a cross-sectional extension 34 for moving the auxiliary frame 6 horizontally. In addition, a wear strip 35 and holders 36 attached to the auxiliary frame 6 are provided to guide the arch bracket 29. The bearing bracket 27 has vertical outer surfaces 37 on which it rests on guides 28 and oblique outer surfaces 38 on the top and bottom sides to slide along the wear strips 33.

To move the arch brackets 29 horizontally, there is a hydraulic cylinder 40 on each side, which is hinged to the arch bracket 29 with its piston rod 41 and to a support 42 attached to the subframe 6 by its cylinder housing. By changing the height position of the pivot shaft 26, it is possible to change the distance α between the roller 3 and the rotor 4.

The subframe 6 has four rollers 43 by means of which it can be driven longitudinally on rails 44 arranged on each side.

The subframe 6 also has at its other end a cross beam 5 72892 ki 50 with a limiting member 51 consisting of two clamping parts 53a, 53b and a support 54, whereby the clamping parts 53a, 53b can be loosened and tightened by means of a screw connection 55. The support 54 of the limiting device 51 functions to limit the left position of the pivot frame 5, i.e. the position in the direction of the feed roller 3. To avoid severe impacts, the support 53 is provided at its end on the side 22 with a damping element, e.g. a rubber buffer 56.

In order to achieve a uniform load, special limiting devices 51 and 52 are provided for each side 22 of the pivot frame 5. Unlike the described embodiment, the limiting devices can also be provided with hydraulic shock absorbers.

A hydraulic cylinder 57 is arranged between each side 22 of the subframe 6 and the pivot body 5. In this case, the piston rod 58 of each hydraulic cylinder 57 is hinged to the side 22 and the cylinder 57 housing to the auxiliary frame 6 support 59. chamber volume. Thus, a substantially constant horizontal force is applied to the pivot frame 5, somewhat independently of its respective pivot position, in the direction of the feed roller 3.

To drive the rotor 4, an electric motor 61 (not shown in detail) is provided with a hydraulic clutch. The motor 61 drives a pulley 64a of a pair of pulleys with its pulley 62 and the first belt 63, the second pulley 64b of the pair driving a pulley 66 mounted on the shaft of the rotor 4 by means of a second belt 65. attached to the subframe 6

Claims (5)

The 72892 torsion arm spring 68 is pressed through the lever 69 against the lower leg of the belt 63. The speed of the motor 61 and the transmission ratios of the belt drive must be selected so that the speed of the rotor 4 is a multiple of the speed of the roller 3. A crushing apparatus having a rotor (4) provided with pivotally mounted percussion tools (18) and a cylindrical feed roller (3) arranged axially with respect to the rotor as a counter-tool, the rotor and the feed roller being rotated diagonally (diagonally downwards) between them in the conveying direction of the material and one of these rotating device parts is mounted on a pivot frame (22) pivotally suspended on a pivot axis (26) parallel to the rotor-axial axis of the rotor so that this pivot part is pivotally movable to enlarge that the pivot frame (5) is suspended oscillatingly on a pivot axis (26) running vertically above the rotor axis (20) of the rotor so that the rotor (4) is located below the pivot axis (26) but diagonally above the feed roller (3), and the position of the pivot axis (26) is unalterably and that the end positions of the pivot frame (5) in the oscillation can be determined by adjustable limiting devices (51, 52) provided in each case with a damping element (56). Crushing plant according to Claim 1, characterized in that the pivot frame (5) is connected to a device (57, 60) which provides a substantially constant return force in the direction of the counter-tool (3). 7 72892 Crushing plant according to Claim 1 or 2, characterized in that the pivot shaft (26) is height-adjustable. Crushing plant according to one of Claims 1 to 3, characterized in that the pivot axis (26) is horizontally adjustable in the longitudinal direction. Crushing plant according to one of Claims 1 to 4, characterized in that the roller (3) has a surface different from the smooth cylindrical shape. claim;