DE2009405A1 - Rotor for beater mill - Google Patents

Description

Rotor for beater mill,

The invention relates to beater mills in the essentially consist of a rotor on which, in the course of generating this rotor, striking tools or Striking bars are rigidly attached and relates in particular to the attachment of the striking tools to the rotor.

In known devices, the striking tools attached to the rotor by means of bolts or steering head screws, This type of fastening is not satisfactory, however, because as a result of the stresses caused by the centrifugal force and originate from the impact force occurring during operation, which

«2

009837/1552

_ 2 -

Screws are heavily used and therefore an attentive one Supervision required to avoid accidents is.

In other devices, these are partially dovetailed Longitudinal grooves of the eotor protruding impact tools held in these grooves by wedges. In this In this case, the thrusters are only fastened in their lower area, so that the impacts on it to notch phenomena on the back of the blow molding tool and at the rotor parts provided for their support. In addition, the impact tools must in general or the wedges of which are inserted in the axial direction into the grooves, so that their installation and removal is made more difficult.

The task of the invention is that of the known species the attachment of the striking tools have disadvantages to avoid. According to the invention, this is achieved by that the impact tools on the rotor are carried out on the one hand by means of a wedge that blocks itself under centrifugal force, which the base of the drums in a groove of the Fixed rotor and on the other hand by means of screws or bolts, which have the purpose of the head part of the impact tool against a support surface provided on the rotor to apply considerable pressure, so that a burr or notch

- 3 009837/1552

education is avoided at all costs.

Between the veils and their seat is a radial one Play provided so under the action of centrifugal force the impact tool is blocked with the help of the wedge, even if the screws are not .tightened. iSs Countersunk head screws going through the impact tool can be used or screws whose head is held immovable in a seat, which is milled out of the thickness of the striking tool or in another Way is formed.

In the latter embodiment, which is preferably used for striking tools manufactured in a special casting process, it is advantageous that the screw head is not subject to wear because of its concealed arrangement inside the striking tool. On the other hand, the screws only the purpose of a plant of the impact tools have effect on the rotor to g, while the centrifugal force resulting from the radial stresses are taken up by the grooves located in the wedges. The screws are therefore less stressed than in the known forms of construction and only in their longitudinal direction, which reduces the risk of breakage.

009837/1552

With the concealed arrangement of the screw heads, these be arranged in recesses of the striking tool, which have a T-shaped cross-section, parallel to the Extend the support surface of the striking tool and on it Leak inside surface.

To facilitate installation and removal, the screws can in all cases be radial, outwardly open be arranged slits of the rotor, since they do not have to absorb any radial stress. With this training you can the striking tool and its screws can be inserted into the slots without difficulty.

The following are non-limiting embodiments of the Invention explained in more detail with reference to the drawings, for example.

In the drawings shows;

Fig. 1 shows a cross section through one designed according to the invention Rotor for a beater mill j

2 shows a cross-section, only half illustrated, of a rotor with a modified type of fastening for the striking tools;

009837/1552

11g. 3 shows a perspective view of the rotor according to FIG. 1 with the striking tools removed; .

- cowardly. 4 is a sectioned, perspective partial view of an impact tool from the I ¹ Ig. 1 to explain the assembly of the screws. .

The rotor 10 shown in Figures 1 and 3 has |

cylindrical shape and has two diametrically opposite arranged prismatic grooves 12, which extend over the entire length of the rotor and parallel to 'Generators of the rotor run. In these grooves two hammer tools 14 are arranged, which from in cross section consist of rectangular strips.

One of the side surfaces of the grooves 12 is flat and forms

the support surface for the striking tool. The opposite

lying groove side surface is also flat and forms an angle between 10 ° and 15 °, in such a way that the .Nutenbreite, starting from the groove base, decreases towards the outside.

Each impact tool is held in its groove 12 by a K ^e il 16 whose length corresponds to the rotor and which is arranged between the VordeifLäche or ütoßflache of Schlagwerkzeugea and the inclined side surface of the groove 12th

, 009837/1552

In the roofs of the that are in contact with one another The wedge and the striking tool are each semicircular longitudinal groove provided, wherein the two grooves mentioned are opposite one another, so that a round bar from soft steel can be inserted, which forms an insert spring 18, the impact tool and the wedge connects and keeps them in their right position.

The gravity center punctuates the one from the kei ± and the striking tool The whole formed is located in the center plane of the plane angle formed by the two side surfaces of the groove, so that a better fixation of the striking tool and its easier expansion is achieved.

The hammer tools are still on the rotor through several Bolts 20 attached, the heads of which are held against rotation by seats formed in the striking tools -are. These seats consist of transverse grooves 22 with a T-shaped cross-section, which extend parallel to the large surfaces of the impact tool and at the inward facing surface of the blow molding tool, as illustrated in FIGS. 1 and 4. The screws are located in radial slots 25, which for Outside of the rotor are open. At the back of the slots are seats or recesses for the nuts of the screws intended,

009837/1552

The screws are used to pre-tension the striking tools exercised by which this against the Auilagefläche of the rotor are so strongly pressed that the contact pressure the impact tool does not drop to a value of 0 under any of the stresses occurring during operation. ·

To attach a striking tool, the wedge 16 and the insert spring 18 are first inserted at the base of the groove 12, whereupon after the screws have been inserted into the striking tool, the latter is inserted into the groove by ooen, the screws sliding through the slots 23. Then the insert spring and the wedge 16 are brought into the correct position and held in this position by wedges used as an alternative, which are introduced from both ends and uαϊerreifen the striking tool. After the nuts of the screws have been screwed 20 without Krauftausübung, allowed to start the rotor, said wedged under the action of centrifugal force, consisting of the wedge and the impact tool üesamtheit in the groove, after which λ the nuts of the bolts are tightened.

Instead of slots for fastening the screws to the rotor, holes can also be provided can be oval so that the insertion of the screws is facilitated.

009837/1552

In this training orm is the assembly of the striking tools a little more difficult, because the screws on the rotor have to be inserted first, after which the hammering tool in its seat is inserted with the screw heads in the Slide in recesses 22.

For the purpose of fastening the striking tool on the rotor can also Use screws 20 'with countersunk heads (Jig. 2). In this form of training, the screw holes are from the Wedge ± 6 'protected, which prevents too rapid wear.

In the fastening type according to the invention, the screws take no shear forces, as the radial loads caused by the centrifugal force are transferred from the wedges ± 6 will. The screws therefore only serve to prevent notches from appearing on the rear of the striking tool and to prevent the contact surface of the rotor. The nuts are used to replace a used striking tool of the screws 2U loosened, the whole consisting of the striking tool and the wedge from their freed wedged position, after which the insert spring 18 is pulled out and the impact tool is removed radially.

It is clear that the bolts provided with nuts can also be replaced by those that are in the thread do Irungen Impact tools are screwed in. Furthermore, you can

009837/1552

Striking tool and the wedge also by means other than be connected by an insert spring. Finally is also suitable for hoists with more than two striking tools applicable as well as for such impact tools and wedges with other shapes.

All mentioned modified embodiments as well as those, which can be achieved by replacing the means described with | technically equivalent means should be covered under the protection regulations of the present invention.

0 09837/1552

Claims (1)

June 26, 1970 File; PGm 6öO4 Patent claims XjL) rotor for beater mill with several beating tools, which are formed in SOrm of strips and are arranged on the rotor along the length of its enveloping surface, characterized in that each beating tool (14) on the one hand by a substantially the same length and its part facing the Kotor axis in a longitudinal groove (12) of the rotor (lu) fixing wedge (16, 16 ^f ) prismatic cross section and on the other hand by several screws (20, 2ü ^f ) that brace the rear face of the striking tool against a bearing surface of the rotor . Rotor according to claim 1, characterized in that the The heads of the screws (20) are arranged in recesses (22) of the striking tool (14) which are T-shaped Have cross-section, extend parallel to the support pool of the bearing tool and on the rotor axis run out adjacent inner surface of the striking tool. - II - 009837/1552 3.) Rotor after. Claim 1, characterized in that the screws (20 ¹ ) extend through through bores of the hammer tools (14) and that the copies of the screws are sunk in the hammer tools and are at least partially covered by the wedge (16 ^f ). 4 ») rotor after. Claim 1, 2 or 3, characterized marked j net that the screws (20, 2.0 ') through the rotor (lu) arranged, radial and outwardly open slots (2j $) extend. 5.) Rotor according to one of claims 1 - 4, characterized in that that the front surface to the rear roof of the striking tool (14) runs parallel that the wedge (16, 16 ·) between the front surface and a inclined side surface of the j) iut (12) receiving the impact tool and that the wedge and § the striking tool is held together by a spring (barrel wedge) (18) are. 6.) Rotor according to claim 5, characterized in that the Center of gravity line of the assembly consisting of the wedge (16) and the striking tool (14) on a Plane that passes through the intersection of two each - III - 009837/1552 one of the two side surfaces of the longitudinal groove (12) of the Hotors (lü) containing levels goes and those of these planar included angle halved. 009837/1552 L e eτ s e i t e