DE343633C - High-speed mill with a shaft running in ball bearings arranged outside the grinding chamber and a stuffing box arranged between the grinding chamber and the ball bearing located next to it - Google Patents

Description

The invention relates to high-speed mills of the type dar centrifugal and Pin mills with ball bearings arranged outside the grinding chamber Shaft and between the grinding chamber and the ball bearing located next to it arranged stuffing box. The novelty is that the outer race that ball bearing receiving, on the

ίο End wall ^{1 of} the mill housing releasably attached bearing body at the same time forms the pressure ring of the stuffing box, which in turn is independently and detachably and adjustably connected to the bearing body, independently of the MüHengehäuse, while the inner race dbs ball bearing against a ring that is axially displaceable and adjustable on the shaft supports. This support ring is expediently formed by the cord pulley for driving the feeding device. The ring or the cord pulley is in turn supported by an adjusting screw against the drive pulley which is fixed on the shaft. In this way it is achieved on the one hand that the stuffing box can be retightened without disrupting the operation and, furthermore, can easily be repackaged without dismantling the machine. On the other hand, a slight readjustment of the ball bearings, of which the second (outer) is supported in a known manner against a shoulder of the shaft, is made possible, which makes assembly much easier Running the ball bearing is no longer required.

In the drawing an embodiment of the invention is shown schematically, namely show

Fig. Ι a beater mill with exchangeable grinding device in the vertical Axis cut,

Fig. 2 a detail.

Within the grinding chamber α , which is set up in a known manner, the exchangeable beaters c are arranged on the inner end of the shaft b. The shaft b runs in ball bearings d and e arranged outside the grinding chamber, a stuffing box being arranged between the grinding chamber α and the ball bearing d located next to it. The outer race of this ball bearing d is carried by a bearing body f which is releasably fastened to the bearing plate g, which forms an end wall of the mill housing, by means of screws h. A correspondingly designed part of the bearing body / forms the pressure ring / ¹ for the stuffing box i, which is a part of the housing

Front wall and the end shield g forms an independent piece and is connected to the bearing body f by screws k in a detachable and adjustable manner. The gap between the stuffing box i and the end shield g is closed by a sealing washer or a sealing ring s .

The inner race of the ball bearing d is axially displaceable on the shaft b. He ίο is supported against a arranged on the shaft b cord washer I, which is used in a known manner to drive the feeding device, not shown, of the mill. The cord pulley I can also be displaced on the shaft b. In turn, it is supported by means of a screw m against the drive belt pulley c, which is fastened non-rotatably and non-displaceably on the shaft b by a pin screw η. The screw m rests on the one hand in a bore o ^{1 of} the disk 0, on the other hand it is mounted in a radial cutout or slot I ^{1 of} the churning disk / j and therein against rotation by a; Pin secured with ^1. One on the screw m ! arranged SteMmuttsr p is supported against ■ the pulley 0 facing end face j of the cord pulley. In order to prevent the screw m from being thrown out of the slot in the cord pulley, the nut p engages in a recess provided in a lan dar cord disk, the recess and the part of the nut engaging therein being suitably conical. The pulley 0 is provided on the side facing the cord pulley with an axial recess o ² , in which the cord pulley Z finds place when it is axially displaced.

The outer race of the bearing e is arranged in a bearing body r , which is also releasably attached to the double-armed arm g ^{1 of} the bearing plate g in order to facilitate assembly. The inner race of this bearing is directly supported against a shoulder b ^{1 of} the shaft b.

As can be seen, with the help of the screws k it is possible to re-tension the stuffing box without malfunction. It is no longer necessary to disassemble the machine to replace the packing of the stuffing box. It is sufficient for solution of the adjusting nut p the snort m remove and the fixing screws h of the bearing body f to be solved, whereafter the cord pulley / and the Laigerkörper / velvet gland i can overcome shifted so far j in the axis direction so that the stuffing \ socket is freely accessible. After loosening the screws k , the stuffing box can then be opened and a new packing can be provided, whereupon the parts are returned to their previous position.

By means of the screw m and p of the nut, the inner race of the bearing can d easily be switched on or adjusted, whereby "as the other bearing e d in the opposite direction as the Laiger against the shaft · l is based, both bearings evenly and precisely a - and can be adjusted. For this reason, the parts no longer need to be manufactured with the perfect accuracy previously required; rather, any inaccuracies in the axial direction can be compensated for by the adjusting nut p. ⁷ ^

Claims (6)

Patent Claims: i. High-speed mill with a shaft running in ball bearings arranged outside the grinding chamber and a stuffing box arranged between the grinding chamber and the ball bearing located next to it, characterized in that the outer race of the ball bearing (d) is detachable from one on the end wall (g) of the mill housing attached bearing body (/) is received, which at the same time forms the pressure ring (/ *) of the stuffing box (i), which is independent of the mill housing and detachably and adjustably connected to the rotor body (/), while the inner race of the bearing against one the shaft (b) axially displaceable and adjustable ring is supported. 2. A mill according to claim 1, characterized in ¹ that on the shaft (5) axially displaceably and adjustably arranged ring against which 'the inner race of this ball bearing (d) relies formed as a cord pulley (Γ) for driving the feed device is. 3. Mill according to claim 1 and 2, characterized in that the axially displaceable Support ring or the cord pulley (/) cannot be displaced against the on the shaft attached drive belt pulley (0) can be adjusted by means of an adjusting screw (w) supported, which rests expediently in a lateral hole in the pulley. 4. Mill according to claim; 1 to 3, DA * ¹⁰ by in that the support ring or the disc against the cord Riemscheibe supporting screw (m) is removably disposed. 5. Mill according to claim 1 to 4, characterized in that the screw (w ^{) is non-rotatably mounted in a radial slot or cutout (i 1} ) of the ring or the cord washer (I) , one being arranged on the screw manipulated ^lao mother (p) against the one of the belt washer (ο)
facing face of the ring or
the cord disc (Z) into a recess
the same intervening, leaning. the cord disc (Z) at its axial 6. Mill according to claim ι and 2, there, displacement takes place. characterized in that the pulley (o) is provided with an axial recess (o ² ) in which the support ring or For this purpose ι sheet of drawings. li'ERLlN. PRINTED IN THE DEICHSDRUCKEREI.