SU940837A1 - Top support of moving crushing cone of cone crusher - Google Patents

Description

The invention relates to coil crushers, namely, the upper bearing assembly of a movable grinding cone.

A top bearing of a movable crushing cone of a cone crusher is known, containing indents and carrying half rings entering the shaft grooves, the latter sitting on the shaft with a gap, which during the operation of the crusher leads to mutual displacement and wear of the shaft sleeve and half rings 1.

By its technical essence, the closest to the proposed support is the upper support of the movable crushing cone. Crushers for large crushing with mechanical adjustment of the discharge gap, containing a split conical sleeve mounted coaxially on the shaft end of the movable cone in the yoke bar 2.

In such crushers, the cone is suspended from the crosshead body and the suspension assembly simultaneously performs the function of adjusting the gap. Using a split cone sleeve, screwed onto the shaft end of the movable cone, it is lifted or ooookanie, which determines the size of the discharge gap between the cones. To do this, the 1-SHAFT cone is raised with a crane, the backup nut is pulled out of the conical connection with the yoke, knocked out a wedge and, turning the nut on, a few turns, lowered the taper into place and blocked the wedge. In this case, the discharge gap varies.

The disadvantage of such a support is the failure of the main shaft, since during the operation of the crusher there is a strong deformation of the thread windings or their partial break due to high strains arising in the thread from the sum of the dead weight of the rolling cone and the vertical component of the crushing, reinforced in a cone-joint and secondarily reinforced in the thread itself, as in a wedge, when crimping the split taper bushing with a yoke. At the same time, the voltage in the turns of the main shaft in contact with the lower turns of the section 20 of the carved taper sleeve is significantly higher than in the remaining turns in contact with it, due to the difference in the tapered part: in the lower part, the sleeve is compressed and deformed considerably more than top. As a result, the sleeve is wedged with deformed turns and cannot be turned, so the sleeve is removed, cutting it into pieces. The broken threads on the main shaft are removed, and the deformed part

thirty

corrected manually. It was only after the atoro that the main shaft was again allowed to work with the new split hub. In the event of a screw failure, an expensive shaft is rejected.

The disadvantages of this support are also the laboriousness of adjusting the discharge gap, due to the fact that the adjustment is performed manually to create the necessary torque through the lever in order to rotate the split sleeve; pitch adjustment equal to the pitch of the main shaft thread, and regulation with a shorter pitch is impossible, since the spindle cannot be rotated on the shaft less than one turn due to mismatch of the key grooves, and an increase in their number weakens the already weak thread; the difficulty in manufacturing consists in the necessity of cutting a resistant thread on the surface of a heavy shaft of large diameter and length.

The aim of the invention is to improve the reliability of the upper support, simplify and provide fine adjustment of the discharge gap, reducing the complexity of the repair.

The goal is achieved by the fact that in the upper support of the mobile crushing cone of a large-size crusher cone crusher with mechanical control of the discharge gap containing a split cone sleeve mounted coaxially on the shank of the movable cone shaft in the cross member cage, the shank of the movable cone has circular grooves and provides en installed in one of the grooves retaining ring, supported on the end of the split cone sleeve.

In FIG. 1 depicts a general view of the top onori; in fig. 2 - installation option stop 1 rings.

The upper support contains a shank of the main shaft 1 belonging to the movable cone, having a series of annular grooves 2, in each of which, depending on the desired slot size, a cut-off plate 3 cut into pieces is installed, which can be made with shoulder 4 and is set up or down with it, Subscribe to the split cone vtuliu 5,

in contact with the yoke 6, supported on the tapered sleeve 7 and the washer 8, the yoke 9.

If necessary, to achieve

maximum precision adjustment of the discharge gap, and between the ends of the bushing 5 and the ring 3 cut into pieces, are spacer gaskets.

To adjust the gap, the shaft 1 is lifted by a crane, the ring 3 cut into pieces is removed, and it is placed into the right of the grooves 2 up or down with a shoulder 4, depending on the required height of raising or lowering the shaft 1 of the movable

cone and then lower it into place.

Replacing the threaded interface with smooth cylindrical surfaces eliminates the failure of matching parts.

and accident rate for this reason.

When making the upper support according to the invention, time and effort for adjusting the gap are not needed, the manual operation reduces only to

installation of the ring cut into pieces.

Claims (2)

1. Muyzemnek Yu. A. Konusna crusher. M., “Engineering, 1970, p. lOil. 2.Donchenko A.S. and others. Operation and repair of crushing equipment, M., “Nedra, 1972, p. 70