SU459344A1 - Forced Mixer Vibrating Mixer - Google Patents

Description

one

The invention can be used in the building materials industry for the preparation of predominantly aerated concrete mixes.

Vibro-concrete mixers of forced mixing are known, containing a housing mounted on shock absorbers with a vertically positioned central tool and screw-type agitators placed around it, with the drive wheel of the vibration exciter rigidly fixed on the shaft of the central tool.

The purpose of the present invention is to provide the possibility of adjusting during the operation of the frequency of oscillation of the working element and setting the mode of vibration to resonance.

This is achieved by the fact that the driving wheel of the vibration exciter is installed with a gap between the upper and lower electromagnets fixed in the housing, and the gaps between the driving wheel and the electromagnets are made in the form of pneumatic chambers.

FIG. 1 shows schematically the vibrobetonmestel described; in fig. 2 - the same plan view; in fig. 3 is an AA section of FIG. 2

The vibro-concrete mixer contains a vertical cylindrical body 1 mounted on the frame 2 by means of amortisators 3 and

having several loading nozzles and discharge hatch (not shown).

A rigid frame 4 is mounted on the case, to which electromagnets 5 and 6 are fastened, carrying slip guides 7 and 8. In the latter, a central shaft 11 is fixed by means of elastic supports (springs 9) and bearings 10 with the possibility of axial oscillations

(Measles) 12 with a rim 13, a removable working body 14 with a spherical disk 15 and nozzles 16 and 17 of different lengths for the introduction of an aluminum suspension. On the neck of the lower electromagnet is installed with the ability

rolling relative to the axis of rotation of the central working body by means of a pneumatic drive 18, frame 19, contains electric motors 20 and high-speed screws 21. The gap between the wheel and electromagnets is adjusted using nuts 22 and 23. The rim is connected to the main drive 24 by means of a V-belt transmission 25.

Vibration mixer works as follows. Silica component slurry

and the required amount of water is loaded irri rotation, working bodies 14 and 21 in the absence of vibrations. Then include a push-pull electromagnetic vibrator and load into the hoop, 1E. Springs 9 provide

maximum resonance stiffness at minimum oscillation frequency. With increasing frequency, compressed air is supplied to the gaps between the bark 12 and electromagnets 5 and 6. In this case, elastic pneumatic supports with adjustable stiffness are formed by changing the pressure in the gaps. Thus, the system is tuned to a resonant mode in a wide frequency range. Air leakage to the atmosphere is eliminated using an annular labyrinth 26. Object of the invention about tl and h, and yu sh. so that, in order to enable the frequency of oscillations of the working organ to be regulated during operation, and the mode of vibrating to resonance, the drive wheel of the exciter is installed with a gap between the upper and lower electromagnets fixed in the housing, and the gaps between the drive wheel and the electromagnets are made in the form of inevmokamery.

25 21

FIG. one