SU1442382A1 - Protection device for shot-blasting apparatus - Google Patents

Description

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The invention relates to the treatment of products with shot, namely, shot-breaking apparatus.

The purpose of the invention is to increase the reliability of the apparatus.

FIG. 1 shows a shot blasting apparatus; in fig. 2 shows section A-A in FIG. ; in fig. 3 - section BB in FIG. 1; in fig. 4 shows bg in FIG. one; in fig. 5 - times cut YYD in FIG. one; in fig. 6 a section dd in fig. 3

/.1 The buoyant apparatus (Fig. 1) includes a housing 1 inside which an impeller 2 with radially arranged blades 3 is mounted for rotation. The lining of the inner cavity of the housing 1 includes lateral protective plates A, upper plate 5 and end protective 6, protective elements are complete in the form of a set (row). disks 7 with parallel axes 8, installed in steps with overlapping. The pitch (center-to-center) distance T between axes 8 is selected as follows:

.o,

where D is the diameter of the disk;

d axis diameter;

c - required clearance (mm). The axes of the discs 7 are rotatably inserted into the covers 9, which are fixed to the housing 1. At the ends of the axles 8, there are fixed sprockets 10 connected by chain loops 11 with a drive 12 of their rotation.

On the back (reverse) side of the discs 7, sectors 13 are pasted out of the porous material (felt, foam rubber, etc.). Between sectors 13, gaps b (2 + 8 mm) are maintained, forming radial channels 1A.

In the space between the walls of the casing 1 and the rear sides of the discs 7, a closed cavity is formed, which is connected through the oil distributor 15 to the compressed air main line.

Shotblasting machine works in an encouraging manner.

The fraction is fed to the rotating blades 3 of the impeller 2 and, under the action of centrifugal force, ejects with a high velocity in the form of a torch onto the surface to be treated. Part of the ejected fraction in the form of unproductive flow strikes the face zapshtnyh elements 6 of the housing 1. The drive 12 of the chain loop 1 is turned on and rotation through the sprockets 10 is transmitted to the disks 7 (the rotation speed is selected depending on the mode of shot-blasting processing). Simultaneously into the closed cavity between the walls of the body 1 and the rear sides of the discs 7, compressed air begins to be pumped through the oil distributor 15 from the line.

There is a constant rotation of the disks 7 on the axis x 8, which causes the reduction of the impact (contact) of the fraction per unit area (cm) in comparison with the usual (fixed) britseite one. The air containing oil (sprayed oil) leaves at high speed through radial channels 1A, cools the surface of the disks 7, and also discards 7 years of non-productive flow from the working surfaces of the disks. The oil that condenses on the portions 13 of a porous elastic material lubricates and effectively cools the working surfaces of the adjacent disks 7 at the same time. The impact of a flying shot decreases dramatically due to improved slip and heat transfer.

In view of the fact that the axes 8 of the discs 7 are freely mounted in the tongs 9 during the operation, under the action of their own weight, the discs 7 are successively pressed against each other and the upper plate 5 to compensate for the wear of the working surfaces of the discs.

Claims (1)

Invention Formula A protective device for a shot-blasting apparatus containing wear-resistant protective elements placed on axes with a possibility of rotation on the body of the shot-blasting apparatus, characterized in that, in order to increase durability, the protective elements are designed as installed stepwise with overlapping discs, the axis which are kinematically associated with the drive of their rotation introduced into the apparatus, while on the back of each disk there are figs s 8o S-b TGronev.-polygram. pr-e, Uzhgorod, st. Design, Vid