SU1243835A1 - Pneumatic vibration exciter - Google Patents

Description

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The invention relates to a vibration technique and can be used to compact concrete during the molding process.

The aim of the invention is to improve ease of operation by eliminating the transfer of dynamic loads to the supporting surface.

The drawing shows a diagram of a pneumatic vibration exciter, a longitudinal section. :

The pneumatic vibration exciter comprises a hollow cylindrical body 1 mounted on the support surface 2, a piston 3 in the form of a glass with an opening A in the bottom 5, the cavity of which is connected by channels for supplying 6 and exhausting 7 compressed air with a pressure source (not shown) and atmosphere through the cavity 8 formed between the housing 1 and the piston 3, the shell 9 with the channels 10 for discharging compressed air, telescopically mating with one of the elements of the vibration exciter, for example with the piston 3 using adjusting elements 11. At the end of the housing 1, tanned on the supporting surface 2, the sealing juice 12 is fixed, and the bottom 5 of the glass faces the same end. A cavity 13 is formed between the bottom 5 and the operatic surface, into which air is compressed through the opening 4.

Pneumatic vibration exciter works as follows.

Through the channel 6 compressed air is supplied to the internal cavity of the piston 3, which through the openings 4 of the primer. Compiler N.Vartanova Editor A.Dolynich Tehred L.Oleins Proofreader M.Pojo

Order 3742/10 Circulation 428-Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

. Production and printing company, Uzhgorod, st. Design, 4.

438352

gives into the cavity 13 formed by the bearing surface 14 and the bottom of 5 cups, and then goes out into the atmosphere between the sealing gap -12 and

5 support surface 2, thus forming an air lubricant. At the same time, through the channels 7, compressed air is supplied to the cavity 8 formed between the piston and the housing. Therefore

10, the piston 3 moves relative to the housing 1 upward until the upper end of the housing 1 is below the channels 10 of the shell 9. At the same time, compressed air from the cavity of the piston 3

15 is vented through the channels 10 to the atmosphere, and the pressure in the cavity of the piston 3 and, respectively, into the cavities 13 and 8, the paddle and the piston 3 under the action of the load (P) is lowered. To adjust the oscillation amplitude (stroke of the piston 3) relative to the housing 1, the shell 9 is moved by means of the adjusting elements 11 relative to the piston 3 up or down, respectively, depending on the need to decrease or increase the amplitude of the oscillations. When the piston 3 is lowered all the way down, the el impact of the elastic shock occurs, which

30 is due to the presence of a layer of gas lubricant between the support surface 2 and the exciter. Thus, the said gas layer is an vibration isolator protecting the support surface 2 from dynamic loads, which makes it possible to effectively use this design of the vibration exciter, for example, for vibratory reinforcement of concrete.

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Claims (1)

PNEUMATIC VIBRATOR, containing a hollow cylindrical body mounted on a supporting surface, a piston in the form of a cup with an opening in the bottom, the cavity of which is communicated by channels for supplying and discharging compressed air with a pressure source · and atmosphere, and a shell with channels for discharging compressed air coupled to one of the elements of the vibration exciter, characterized in that, in order to improve ease of use, a sealing girdle is fixed to the end of the housing mounted on the supporting surface , and the bottom of the glass faces the same end. with βΖΖΖΖΖΖΖΖΖΣΖΖΖΖΖΖ. SU 1243835 A1 -t5 g 1 1243835