SU1216088A1 - Driving vacuum drum - Google Patents

Description

2. Vacuum drum according to claim 1, characterized in that the axial movement mechanism is made in the form of a fixed support with screws fixed to it, connected to

one

This invention relates to conveyor transport and can be used in all industries that operate belt conveyors.

The purpose of the invention is to increase the reliability of the vacuum drum.

FIG. 1 shows a vacuum drum; in fig. 2 shows section A-A in FIG. one.

Driving vacuum drum consists of a shell 1 with longitudinal grooves of the channels 2, mounted on the front disk 3 of the drum mounted on the shaft 4.

The longitudinal channels 2 are connected via radial channels 5 to an air suction collector, which contains two rings inserted into each other and having a mating surface in the form of a truncated cone, the apex of which is directed to the inside of the drum. The inner ring 6 of the collector is installed through the slotted sleeve 7 on rolling bearings 8 mounted on the shaft 4 of the drum. The outer and inner rings of the bearings are fixed by means of the ring 9 and the sleeve 10.

The inner ring 6 of the collector has a vacuum chamber 11 and a purge 12, made in the form of grooves symmetrically located on the outer surface of the ring 6. The length of the groove corresponds to the arc of the circumference of the tape drum. Both chambers are equipped with fittings 13 for connecting respectively to the suction and exhaust piping of the vacuum pump.

The outer ring 14 of the collector is fixed on the shaft 4 of the drum by means of a key and has radial channels 15 extending into the depression chamber 11 of the inner ring 6 of the collector and connected to the radial channels 5 of the drum.

A sealing ring 16 is attached to the outer end surface of the ring 14.

A device for its axial movement, comprising traction screws 17 with nuts 18 and a spring 19 mounted in the slots of the fixed support 20, is connected with the inner collector ring 6.

inner ring collector, and located between the fixed support and the inner ring of the collector spring.

The beer vacuum drum operates as follows.

During the rotation of the drive vacuum bar, the tape overlaps the bottom surface with the longitudinal grooves of the channels 2 located on the arc of the drum girth of the drum. At the same time, using a vacuum pump connected to the collapsing chamber 11, radial channels 5 and associated longitudinal grooves 2 channels located in the zone of action of the vacuum chamber 11 are sucked in air. As a result, a vacuum is created under the belt at the circumference arc and the conveyor belt is pressed against the drum with an overpressure equal to the difference between atmospheric and atmospheric pressure.

residual under the fly, which ensures reliable adhesion of the belt to the drum surface when transmitting high traction forces. At the exit of the radial channels 5 from the arc of the girth, they are connected to the chamber

12, a collector purge connected to the exhaust pipe of the vacuum pump, whereby the channels 5 are cleaned with a jet of compressed air. The installation of the inner ring 6 of the collector on the shaft with the help of the bearing 8 allows

mating the inner 6 and outer 14 collector rings with a guaranteed micro gap, excluding the transfer of force pressure to the mating surface of the rings. The slotted connection of the inner ring 6 of the manifold with the sleeve 7 installed

on support 8, provides the possibility of axial movement of the ring 6 by means of a screw device fixed in the grooves of the fixed support 20. This makes it possible to adjust the guaranteed micro gaps between the conical interfaces of the rings 6 and 14 of the collector and compensate for its increase during friction wear of the ring surfaces. This also provides access to the vacuum chambers and purging the collector for their

preventive cleaning.

A screw 17, rigidly connected to the collector ring 6, prevents the ring 6 from rotating with the drum shaft 4.

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Claims (2)

1. DRIVING VACUUM-DRUM, including a shell mounted on the shaft with end disks with longitudinal and radial channels connected by channels of the outer ring of the collector, fixedly mounted on the shaft, with purging and rarefaction chambers of the inner ring of the collector mounted on the shaft with bearings, and with the possibility contacting the outer ring of the collector with mating surfaces, characterized in that, in order to increase its reliability, the mating surface of the inner and outer rings of the collector is made in the form Braz truncated cone, the vertex of which is directed into the interior of the drum and the vacuum drum is provided with a bushing placed between the bearings and the inner collector ring connected thereto by a splined connection, wherein the reservoir is provided with an inner ring axial displacement mechanism. ^ "G. / 2. Vacuum drum according to π. 1, characterized in that the axial movement mechanism is made in the form of a fixed support with screws fixed to it, connected to the inner ring of the manifold, and a spring located between the fixed support and the inner ring of the collector.