SU968175A1 - Hydraulic vibration hammer - Google Patents

Description

(W) HYDRAULIC VIBROMOLOT

The invention relates to construction, in particular to vibratory hammers, and can be used for loosening soil, for immersing piles, casing pipes, grooves. The invention may also find wide application in the mining and metallurgical industries for the development of soil for the destruction of rocks of average strength. A hydraulic vibratory hammer is known, comprising a housing with upper and lower anvils, a cylinder and a distribution device. A stepped piston is installed in the cylinder, which connects the whole with the drummer. This device belongs to the double-acting vibration hammers with reciprocating postoperative distributors p. The disadvantage of such a vibratory hammer is low reliability due to the complex design of the distribution device and the large number of internal channels and seals. The closest to the invention to the technical essence is a hydraulic vibratory hammer, comprising a housing with a shank and a working cylinder, located in the latter, a piston and a rotary distributor, a working member fixed in the shank 2. A disadvantage of the known device is. This is a low service life, due to the rapid deterioration of the working surfaces of the cylindrical distributor and the loss of tightness. The purpose of the invention is to increase the reliability and durability of the hydraulic vibratory hammer. This goal is achieved by the fact that in a hydraulic vibratory hammer, comprising a housing with a shank and a working cylinder, the piston located in the latter and the rotary distribution

the divider, the working body fixed in the body shank, the working cylinder is provided with a partition horizontally installed in the above-piston cavity with openings dividing the cavity into the inlet and working chambers, and the distributor is made in the form of a screw turbine with a shaped fairing installed in the inlet chamber , supported by a partition and centered with its axis.

FIG. 1 shows a hydraulic vibratory hammer, longitudinal section; in fig. 2 is a section A-A. In FIG. one.

The hydraulic vibratory hammer contains body 1, cylinder 2c having through-holes with a distribution partition 3 dividing the cavity of cylinder 2 into the input chamber A,

which is a screw turbine .4, and working In the camera, in which is located a stepped piston 5 supported on a destructive tool 6, a shank 7 serving to connect the destructive tool to a cylinder 2.

The screw turbine k has spiral vanes 8 of a rectangular cross section with a blind axial mounting hole 8, a profiled fairing.

10 located at the top

: turbines, and supported by its lower end surface on the distributor partition 3. The distribution partition 3 is made with an adjusting finger L. The cylinder 2 has an inlet 12 and a drain 13 hole.

Hydraulic vibrohammer works as follows.

When the hydraulic pump (not shown) is turned on, the fluid from the inlet chamber | PJAJ AJ is additionally accelerated in the annular diffuser formed by the wall of the cylinder 2 and the profiled fairing 10, flows through the spiral blades of the screw turbine 4 and then through the through openings of the distribution partition 3 into the working chamber B of cylinder 2. The screw turbine 4, rotating, periodically closes the through holes of the distribution partition, thereby connecting or separating the inlet A. and the working 8 of the chamber, connecting the piston 5 and the destructive tool 6 with translational motion. In the period of ra. boche move, i.e. when input ka754

Measure A and working chamber B communicate fluid moves piston 5 down and partially (it is drained through a drain. But hole 15- During idling, i.e., when chambers A and B are separated, piston 5 and destructive tool 6 under the influence of resistance forces fracture is returned to its original position, and the liquid from the working chamber B is displaced through the drain hole 13. As the wear surfaces (the end face of the screw turbine and the plane of the distribution partition) wear out under the influence of an unbalanced pressure force The distance between the fixed pin 11 of the distribution partition 3 and the axial installation hole 9 of the screw turbine 4 is possible. The possibility of spontaneous adjustment of the gap between the working parts (the ends of the screw turbine and the distribution partition ) eliminates leakage and extends the service life of the switchgear, thereby significantly increasing debts Fatigue and: reliability of hydraulic vibratory hammer.

Claims (2)

Claims of the invention Hydraulically driven vibratory hammer, comprising a housing with a shank and a working cylinder, a piston and a rotary distributor placed in the latter, a working member mounted in the housing shank, so that, in order to increase reliability, and durability of work, vibro-hammer, its working cylinder is equipped with a partition horizontally installed in the over-piston cavity with an axis and openings dividing the cavity into the input and working chambers, and the distributor is made in the form of a screw. turbines with a profiled fairing installed in the inlet chamber, supported on a re-coring and centered with its axis. Sources of information taken into account during the examination 1. USSR author's certificate No. 642432, cl. E 02 D 7/10, 1979. 2. Graf L. Ye., Kogan D, I. Hydraulic impact machines and tools. M., Nedra, 1972, p. 12-13 (prototype