DE3815986A1 - Magnetic separator - Google Patents

Abstract

In the mounting of a magnetic separator, in particular a superconductor concentrated field magnetic separator, it cannot be avoided that, due to non-uniform loading or temperature influences, transverse forces are transmitted onto the bearings, which transverse forces lead to edge loading in the bearings and thus destroy the bearings after a relatively short period of operation. This is all the more the case as essential bearing parts have hitherto been constructed from electrically non-conductive, relatively soft and, furthermore, temperature-sensitive material. The service life of bearings constructed in such a manner was thus relatively short. According to the invention, however, an eddy-current-free mounting of a magnetic separator, having a very long service life is achieved in a simple manner in that the sliding bearings (1, 2) comprise a bearing housing (5, 6, 7) constructed from a plurality of parts, a bearing ring (8, 9) having a spherically curved outer surface (10, 11), a bearing shell (12, 13) and a bearing sleeve (14, 15), the bearing housing (5, 6, 7), the bearing ring (8, 9) and the bearing shell (12, 13) being constructed from electrically non-conductive material. <IMAGE>

Description

The invention relates to a magnetic separator, ins especially a superconducting magnetic field separator, consisting of a rotatably arranged in plain bearings Neten drum with in the circumferential direction of the drum adjustable magnet system.

So far, one has to store the drum of a magnet Scheiders, especially a superconducting strong field mag netscheiders, very simply trained plain bearings or Ball bearings provided. Of these camps must be in operation of the magnetic separator both in the radial direction acting forces as well as the diagonally to the axis direction of the drive shaft acting transverse forces men and be compensated. Because of this on the stock acting radial and transverse forces are special exposed to high alternating stresses and must therefore be dimensioned particularly strong. Is also due the high alternating loads the service life of the bearings rela tiv low. You have already tried parts of the warehouse made of electrically non-conductive, relatively soft  Form material to avoid eddy current formation the. It has been shown that it is in particular due to the increased temperatures that occur during operation Do not electrically conduct the bearings to deform them the materials come into operation and the warehouse becomes inoperative is set.

The object of the invention is an eddy current free storage of a magnetic separator, especially one To create superconducting strong field magnetic separator all in the operation of the magnetic separator on the bearings acting radial and lateral forces easily absorbed and can be compensated.

This object is achieved in that the plain bearing a multi-part bearing housing, a bearing ring with a spherically curved outer surface, a bearing shell and a bearing bush exist, the Lagerge housing, the bearing ring and the bearing shell made of electrical non-conductive material are formed.

The fact that the slide bearing according to the invention from one Multi-part bearing housing with a bearing ring spherically curved outer surface, a bearing shell and a bearing bush, all will be very advantageous Lateral forces occurring during operation of the magnetic separator evenly over the entire bearing surface of the bearing shell distributed, and thereby edge pressure between the same tendency bearing parts completely avoided. The service life of the In this way, plain bearings are significantly increased.  

The multi-part design of the bearing housing ses the assembly and disassembly of the plain bearing considerably lightened. Furthermore, by the invention Training of the plain bearings as electrically non-conductive Materials for the bearing housing, the bearing ring and the Bearing shell both relatively soft fabrics (e.g. Plastics) as well as very hard materials (e.g. Sinterkera mik) can be used advantageously, thereby eddy currents to avoid in the area of the bearings.

In a further embodiment of the invention, the camp shell of several strip-shaped parts between the bearing ring and the bearing bush at a distance from each other and are evenly distributed over the circumference. The multi-part design of the bearing shell allows a lot also advantageous the use of electrically conductive Materials of metal or the like. Without it significant eddy current formation in the area of the bearings is coming.

According to a further advantageous embodiment of the Erfin is one of the plain bearings for the purpose of adjusting the Magnet system with a worm gear with self-locking mender snail in active connection. That way the magnet system very advantageous from the outside the drum is adjusted and held in this position will.

The respective position of the magnet system in the drum To be able to read exactly from the outside are further exceptions staltung of the invention very advantageous outside on the Lagerge  Housing of the worm gear to limit the Magnet adjustment and a magnet position indicator scale arranged.

Further details, features and advantages of the invention are based on a schematic in the drawing table illustrated embodiment explained in more detail.

It shows:

Fig. 1 a mounted in bearings Stark superconducting gradient magnetic separator in partial longitudinal section according to the invention;

Fig. 2 shows a section along the line AB in FIG. 1.

As shown in Fig. 1, the superconducting magnetic field magnetic separator consists of a drum ( 3 ) rotatably arranged in slide bearings ( 1 , 2 ) with a magnet system ( 4 ) adjustable therein in the circumferential direction of the drum ( 3 ). The plain bearings ( 1 ) and ( 2 ) have, according to the invention, a bearing housing consisting of the parts ( 5 , 6 and ( 7 )) and a bearing ring ( 8 ) or ( 9 ) with a spherically curved outer surface ( 10 ) or ( 11 ), a bearing shell ( 12 ) or ( 13 ) and a bearing bush ( 14 ) or ( 15. ) The bearing bushes ( 14 ) and ( 15 ) are connected to the hollow shaft ( 16 ) and ( 16 ) carrying the magnet system ( 4 ). 17 ) firmly connected, which in turn are mounted in sliding ( 18 , 19 ) rotatably.

The bearing housing part ( 5 ) of the slide bearing arranged on the left side on the magnetic separator ( 1 ), as shown in particular in FIG. 2, is non-rotatably connected by wedges ( 20 ) to a toothed belt pulley ( 21 ), which in turn is connected to an in the drawing rotary actuator, not shown, is connected. About this toothed belt pulley ( 21 ) the drive of the drum ( 3 ) of the Magnetschei ders, with the parallel keys ( 22 ) and ( 23 ), the bearing housing part ( 6 ), the bearing ring ( 8 ) and the bearing shell ( 12 ) are taken in the direction of rotation . The bearing shell ( 12 ) here, as shown in particular in FIG. 2, very advantageously consists of a plurality of strip-shaped parts ( 24 ) which are arranged between the bearing ring ( 8 ) and the bearing bush ( 14 ) at a distance from one another and evenly distributed over the circumference . These strip-shaped parts ( 24 ) are very advantageously embedded in the bearing ring ( 8 ) and slide during operation of the magnetic separator on the bearing bush ( 14 ) which is fixedly connected to the hollow shaft ( 16 ).

In the case of the slide bearings ( 1 ) and ( 2 ) arranged on both sides of the drum ( 3 ), the bearing housing parts ( 5 , 6 , 7 ), the bearing rings ( 8 , 9 ) and the bearing shells ( 12 , 13 ) are very large according to the invention advantageously made of electrically non-conductive material, such. B. made of plastic or sintered ceramic, whereby eddy current formation in the area of the bearings are avoided. In the drawing shown on the left side of the magnetic separator th slide bearing ( 1 ) are only bearing housing and the bearing shell ( 12 ) made of several one-piece parts ( 5 , 6 ) or ( 24 ), while the one on the right Side of the magnetic separator arranged slide bearing ( 2 ) according to the invention not only the bearing housing ( 7 ), but also the bearing ring ( 9 ) and the bearing bush ( 15 ) very advantageously in two parts, namely formed in the longitudinal direction divided. As a result, all bearing parts can be placed on the hollow shaft ( 17 ) and connected to it from both sides very advantageously. For this purpose, the housing parts ( 7 ) are very conveniently provided with openings ( 25 ) in the outer region, carried out by the corresponding dowel screws and thus both bearing housing parts are firmly screwed together. In addition, shrink rings ( 26 ) and ( 27 ), which hold the housing parts ( 7 ) firmly connected to a flange ( 28 ) of the magnetic drum ( 3 ) together, can also be expediently arranged.

Due to the inventive design of the plain bearings ( 1 ) and ( 2 ), in particular by the arrangement of bearing rings ( 8 , 9 ) with a spherically curved outer surface ( 10 , 11 ), all transverse forces occurring during operation of the magnetic separator between the magnetic drum ( 3rd ) and the magnet system ( 4 ) from the plain bearings ( 1 ) and ( 2 ) are taken up and compensated for, since the bearing rings ( 8 , 9 ), like a ball joint on their curved outer surfaces ( 10 , 11 ), slide movements of the with the magnetic drum ( 3 ) Allow firmly connected bearing housings at an angle to the longitudinal axis of the magnetic separator and avoid edge pressures on the bearing shells ( 12 , 13 ). The plain bearing according to the invention therefore have a significantly longer service life compared to the previously known bearings in magnetic separators, and they are also very easy to assemble or disassemble due to their multi-part design.

In order to accomplish an adjustment of the magnetic system (4) in the magnetic drum (3) in the drum revolution direction or opposite to the drum rotation direction, the sliding bearing shown in the figure 1 on the right side (19) is advantageously provided with a worm gear (29) with self-locking worm ( 30 ), which is in operative connection via the hollow shaft ( 17 ) with the magnet system ( 4 ). Outside of the bearing housing ( 31 ) of the worm gear ( 29 ) are not shown in the drawing te stops for limiting the magnet adjustment and a corresponding magnetic position indicator scale, from which the position of the magnet system ( 4 ) in the magnet drum ( 3 ) is very advantageous at all times. can be determined and read from. In addition, the bearing shells ( 14 , 15 ) can also be provided with longitudinal bores ( 32 ), in which temperature sensors ( 33 ) are arranged to monitor the bearing temperatures.

Claims (6)

1. Magnetic separator, in particular superconducting strong-field magnetic separator, consisting of a drum rotatably arranged in slide bearings with therein adjustable magnet system in the circumferential direction of the drum, characterized in that the slide bearings ( 1 , 2 ) from a multi-part bearing housing ( 5 , 6 , 7 ), a bearing ring ( 8 , 9 ) with a spherically curved outer surface ( 10 , 11 ), a bearing shell ( 12 , 13 ) and a bearing bush ( 14 , 15 ), the bearing housing ( 5 , 6 , 7 ), the Bearing ring ( 8 , 9 ) and the bearing shell ( 12 , 13 ) are made of electrically non-conductive material. 2. Magnetic separator according to claim 1, characterized in that the bearing shell ( 12 , 13 ) consists of several lei-shaped parts ( 24 ) between the bearing ring ( 8 , 9 ) and the bearing bush ( 14 , 15 ) at a distance from one another and are evenly distributed over the circumference. 3. Magnetic separator according to claim 1 or 2, characterized in that between the bearing ring ( 8 , 9 ) and the bearing housing ( 5 , 6 , 7 ) keys ( 22 , 23 ) are arranged. 4. Magnetic separator according to claim 1, 2 or 3, characterized in that the bearing housing ( 7 ), the bearing ring ( 9 ), the bearing shell ( 13 ) and the bearing bush ( 15 ) of the plain bearing ( 2 ) are formed in two parts. 5. Magnetic separator according to one of the preceding claims 1, 2 or 3, characterized in that two further sliding bearings ( 18 , 19 ) are provided for the purpose of adjusting the magnet system ( 4 ), of which one bearing ( 19 ) with a worm gear ( 29 ) is in operative connection with the self-locking screw ( 30 ). 6. Magnetic separator according to claim 5, characterized in that the outside of the bearing housing ( 31 ) of the worm gear ( 29 ) stops for limiting the Magnetver position and a magnetic position indicator scale are arranged.