HUT59621A - Swivel head for mineral crusher - Google Patents

Abstract

A rotor (1) for a mineral breaker in which has a removable top plate (4) providing in situ access to the interiors of the rotor (1) and wear parts (4), (8) which can be revolved by sector to maximise the use of same.

Description

The subject-matter of the application is a rotary head for a mineral breaker, a drum-like head with a vertical axis, a dispensing aperture formed on its upper surface and at least one outlet aperture formed on its peripheral surface.

71434-6343 SE • ·

- 2 A rotary head formed in a conventional manner for a mineral breaker is described, for example, in U.S. Pat. in U.S. Pat. In the prior art, the rotary head is arranged in a housing. The material to be processed is fed to the rotating head and, at high speed, hits the housing wall (which is covered with chips) and thus crushes the mineral in contact with the mine.

Due to the nature of the equipment, very high mechanical stresses and abrasions are generated during operation which the equipment must be able to withstand. Both the vertical and horizontal surfaces of the swivel head must be made of abrasion resistant design.

U.S. Pat. No. 4,586,663. The patent describes the protection of vertical walls, but similar, if not more serious, problem of protection of horizontal surfaces. There is no known solution to many construction problems. The mode of operation results in the rotor being subjected to extreme wear and tension. Because of the extremely high mechanical forces, known rotary heads are formed as a one-piece drum of high strength material and can only be penetrated inside the drum through its upper opening and through the outlet for replacement of parts. Because of the narrow openings, the protective covers for the upper and lower inner walls must be assembled and secured from segments that pass through the openings. Fitting the protective cover is difficult due to the circumstances and not reliable enough.

The material changes the direction and velocity of the side walls of the rotor, so the wall should be as smooth, seamless and seamless as possible, as any unevenness causes increased wear. In this respect, the use of a protective cover made up of segments is disadvantageous. It is also desirable that the outer surface of the rotor head has a smooth surface without protrusions.

It is an object of the present invention to overcome the above shortcomings by providing a better mounting than the prior art and providing a rotating head with better wear resistance.

In the embodiment of the rotary head according to the invention, the upper surface of the head part is provided with a removable cover plate lying on the side wall defining the peripheral surface, the inner surface of which forms almost the entire upper inner surface of the drum-like head.

Preferably, the sidewalls and base body of the head are made of a material of greater tensile strength than the topsheet.

Preferably, at least the inner surface of the topsheet is made of a wear-resistant material.

Preferably, the upper wall of the sidewall is provided with a shoulder surface and / or a groove on which the removable cover is secured.

Preferably, the shoulder surface and / or groove is fitted with an inner ring having fastening elements suitable for securing the topsheet on a ring that increases tangential and radial forces to increase the strength of the rotary head.

Preferably, the outlet is formed between an inwardly directed baffle and breaker tips.

• · · • · * ·· ·· ····

- 4 At least three angles of fastening are provided around the circumference of the topsheet to allow the topsheet to be secured in at least three angular positions.

Preferably, the base body of the head is covered with a wear-resistant protective sheet.

Preferably, the abrasion-resistant protective plate is secured to the base body by means of a centering disc.

In the embodiment of the present invention, the lower surfaces of the topsheet are made of abrasion-resistant material or coated with abrasion-resistant material.

In the embodiment of the present invention, the upper surface of the shield is made of a wear-resistant material or coated with a wear-resistant material.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in detail with reference to an exemplary embodiment. In the drawing it is

Figure 1 - Top view of rotary head without cover plate, a

Fig. 2 - longitudinal section of the rotor, a

Fig. 2A - sectional view of the cover plate fixing, a

Figure 3 - top view of a shield, a

Fig. 4 is a sectional view of the protective sheet of Fig. 3;

Figure 5 - top view of the insert disc, a

Fig. 6 is a sectional view of the insert disc of Fig. 5.

Figures 1 and 2 show a rotating head according to the invention. The rotary head has a drum-like head 1 with a vertical axis having a circular base body 2, a side wall 3 and a removable cover 4 which is a cover for the side wall 3. ·

- 5 are fixed.

The base body 2 is mounted on a sleeve 5 in which a bearing 6 and a mounting plate 7 are arranged. The mounting plate 7 is secured to the bearing 6 by pins 7A.

The base body 2 is provided with a lower protective plate 8 which is pressed down by a concentric disk 9. The attachment of the shield 8 is also reinforced by the crushing tips 10 and baffles 11 mounted in the sidewall 3, the function of which is described in detail in the prior art.

The rotary head is also provided with 12 rings.

The topsheet 4 is a disc with a central dispenser opening 13 having a stepped rim 14. The top surface 16 of the topsheet 4 has a circumferential recess formed with a conically protruding aperture flange, while a greater portion of its lower surface 17 is an annular horizontal planar surface extending at a smaller radius to a conical surface 18 defining the dispensing aperture 13. The orifices 3A of the rotary head are formed in the sidewall 3 between a baffle plate 11 and the crushing tips 10.

The upper edge of the side wall 3 of the rotary head is provided with recessed pin holes 15 (Fig. 2a), which fits into the shaft hole with a threaded pin 12A which is screwed into the threaded hole 12B of the bracing ring 12. The pin 12A secures the cover plate 4 to the side wall 3, which also has pin holes 15, but in a larger number than the one formed in the side wall 3. This arrangement allows the cover 4 to be pivoted or rotated. elfordí * · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ···

- fixed in 6 positions, which increases the service life of the wear-resistant cover.

3 and 4 illustrate a possible embodiment of the shield 8. The shield 8 is a ring-shaped disc with a stepped inner opening 19 and a socket 21 formed on its outer peripheral surface 20, corresponding to the breaking tips 10 and the baffles 11. The shield 8 has nine recesses, three more than the number of breaking points 10 and baffles 11, thus allowing the shield 8 to be pivoted relative to the outlets 3A. This is required (similarly to the topsheet 4) because the shield 8 will wear faster than the outlets than at other locations, and by periodically rotating the shield, the wear will be more even, thus extending the life of the base plate. Further, the necessary condition for replacing the shielding plate 8 is that the cover plate 4 can be removed, which is provided in the present invention.

Figures 5 and 6 show the insertion disc 9 for securing the shield 8. The insert disc 9 has a truncated cone shape with a dome-like upper surface and a stepped outer circumference 23. The insert disc 9 has a concentric bore formed with a recess 24, and the lower face of the insert disc 9 also has a stepped, concentric circular portion 25 projecting from the surface. The arrangement of the insert disc 9 in the head part 1 is shown in Figures 1 and 2. The insert disc 9 is secured by 26 screws.

The base body 2, the side wall 3 and the ring 12 are made of tough material, e.g. made of mild steel, the cover plate 4, the insert plate 8 and the baffles 11 made of abrasion-resistant material, e.g. They are made of cast steel, but can also be made of other suitable materials, with a suitable metal layer applied.

The swivel head sidewalls can also be formed from planar surfaces to form a composite surface that facilitates the attachment of the topsheet and provides sufficient rigidity to the walls, but also has edges on the wall that can cause increased wear. Against increased wear, eg. silicone coating.

Although the topsheet and the pad are preferably made of iron-containing material, they are made of synthetic materials, e.g. nylon, thermoplastic materials or ceramics may also be used, particularly for the production of a shield which is predominantly abrasive.

An advantage of the present invention over the prior art is that the inner space of the rotary head is easily accessible from above and consequently

- easy to install and maintain,

- gives greater flexibility in its design,

- One-piece wear surfaces have a longer service life and are easier to assemble compared to known segmented wear surfaces.

Claims (11)

A rotary head for a mineral breaker having a vertical axis drum-like head part (1), a dispensing opening (13) formed on its upper surface and at least one outlet opening (3A) on its peripheral surface, characterized in that the upper surface of the head part (1) ) having a removable cover (4) which is removable, the inner surface of which forms an almost complete upper inner surface (17) of the drum-like head. Rotary head according to Claim 1, characterized in that the side walls (4) and the base body (2) of the head part (1) are made of a material with higher tensile strength than the topsheet (4). Rotary head according to claim 1 or 2, characterized in that at least the inner surface of the topsheet (4) is made of a wear-resistant material. 4. Rotary head according to one of Claims 1 to 3, characterized in that a shoulder surface and / or a groove are formed on the upper part of the inner wall of the side wall (3) to which the removable cover (4) is fixed. Rotary head according to Claim 4, characterized in that an inner ring (12) is fitted to the shoulder surface and / or groove, which comprises tangential and radial force-retaining ring (12) for fastening the cover plate (4). formed. ··· • · · ······ 6. Rotary head according to any one of claims 1 to 3, characterized in that its outlet (3A) is formed between an inwardly directed baffle (11) and crushing tips (10). 7. Rotary head according to any one of claims 1 to 3, characterized in that fastening elements are provided along the circumference of the topsheet (4) to allow the topsheet to be secured in at least three angular positions. 8. Rotary head according to one of Claims 1 to 3, characterized in that the base body (2) of the head part (1) is covered by a wear-resistant protective plate (8). Rotary head according to Claim 8, characterized in that the abrasion-resistant protective plate is secured to the base body by means of a centering disc (9). 10. Cover plate (4) Mineral breaker 2.-9. A rotary head according to any one of claims 1 to 3, characterized in that its lower surfaces are made of abrasion-resistant material or coated with abrasion-resistant material. Protective plate (8) for a rotary head according to Claims 8, 9, characterized in that its upper surface is made of or protected by abrasion-resistant material.