SU1730359A2 - Vibrating hammer - Google Patents

Abstract

The invention relates to construction equipment and can be used for immersing piles and similar structural elements in soils, for wedge destruction of frozen soils, as well as for surface compaction of bulk building materials. The vibrohammer includes an anvil 13 fastened to the base plate, which by means of springs 16 mounted on the pins 15 and the retaining ring 17 is connected to the support legs of the body in the form of hydraulic cylinders 18. In the case are placed a planetary torsional vibration puller, which are offset relative to each other by 90 ° cranks and rods coaxially placed over the anvil of the impactors 11 and 12, alternately interacting with it. By acting on the hydraulic cylinders 18 during operation of the device, it is possible to change the distance of the impactors dropping onto the anvil and thereby changing the force of the shock impulses transmitted to the anvil. 1 il.

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The invention relates to construction equipment and can be used as a universal means of vibro-impact on soils when immersing piles and other structural elements in them, in breaking down strong soils and similar materials, as well as in surface compaction of bulk materials. . St. No. 1481325,

The purpose of the invention is to increase efficiency.

The drawing shows a vibratory hammer.

The vibrohammer consists of the engine 1, whose shaft is connected to the central gear 2 of a planetary torsional oscillator, which also includes satellites 3 diametrically placed on the carrier 4 and equipped with antiphase unbalances 5. The carrier 4 is kinematically connected with the distributor shaft 6, having 90 ° cranks 7 and 8 displaced relative to each other, pivotally connected by connecting rods 9 and 10 with coaxially located strikers 11 and 12, alternately interacting with the anvil 13. Plan A container pulser and a distribution crank shaft 6 are housed in the housing 14, the side walls of which enclose the anvil 13 from its outer side. At the same time, the anvil, fastened with a working body, for example, a sealing plate, is equipped with vertical pins 15 on which springs 16 are put, supported on a stop ring 17, which is connected to housing 14 by means of telescopic struts in the form of hydraulic cylinders 18.

Vibrating hammer works as follows

From the engine 1 through the central gear 2, the rotation is received by the satellites 3, which, due to their antiphase unbalance, create on the driven carrier 4 torsional vibrations transmitted to the shaft b. As a result, the strikers 11 and 12 begin to interact alternately with the anvil 13, which each time will perceive not only the shock impulse, but also the post-force force pressure, stretched in time. Moreover, if the stiffness of the springs 16 is currently greater than the stiffness of the processed medium (i.e., the medium will be more compliant than the springs), further deformation of this medium will occur. If the medium stiffness is greater than the springs, the housing 14 will be released upwards from the anvil 13. A change in the operating mode of the hammer is made in

its operation due to the impact on the stems of the telescopic body struts of hydraulic cylinders 18, which change the distance between the base of each drummer

in its highest position and the anvil. In this case, the greatest impact force will occur if, after the specified distance has passed, the top drummer comes into contact with the anvil in a position where its crank is parallel to the anvil, i.e. when this crank is perpendicular to the drummer. But this will be the case if the mechanical transmission from the driven link of the planetary pulser to the distribution crank shaft does not distort, i.e. does not narrow or grow not in time, the law of motion drove. This will be achieved if the gear ratio of the specified gear is one. Otherwise, in order to achieve the maximum impact in the determination of the mileage of the upper striker up to the anvil, it is necessary to introduce an amendment to the gear ratio of this gear, which is a technical decision

The task has no effect. By decreasing the distance of the upper drummer to the anvil, it is possible to reduce the impact force on it due to the decrease in the speed of the impactor falling at

his contact with the anvil, but at the same time heighten and at the same time stretch the post-impact pressure. It is possible to retract the stems of the hydraulic cylinders 18 to such a limiting position where both strikers will simultaneously contact the anvil. In this case, each of the cranks at their pre-selected relative displacement of 90 ° deviates from the vertical by 45 °, occupies its position in the first and second

quadrants. Under these conditions, the minimum impact force will be transmitted by the anvil itself, but with maximum subsequent force.

Technical and economic dignity

consists in the possibility of changing the operating modes of the device without stopping it, which allows changing the law of the effect on the processed medium over time according to a pre-selected (by preliminary

samples) to the law and thereby increase the efficiency of the device.

Claims (1)

The formula of the invention vibromolot auth. St. No. 1481325, on topics that differ. that, in order to increase efficiency, the hammer body is made with telescopic struts in the form of power cylinders connected to it through a stop ring.