SU891902A1 - Hydro-percussive device - Google Patents

Description

(54) HYDRAULIC DEVICE

I

The invention relates to the mining industry, building and road engineering, in particular, to devices for the development of soils by pulsed loads.

A hydraulic shock device is known, which includes a housing with a striker placed in it, connected to a piston and a rod, a distribution unit located between periodically communicating cocking and overflow chambers t.

Its disadvantage is the complexity of the design.

The closest solution to the technical essence and the achieved result is a hydraulic shock device, comprising a housing with a striker placed in it, connected to a piston and a rod, a distribution unit made in the form of a cylindrical elastic locking element and located between periodically communicating platoon and overflow chambers cylinder hydropneumaccumor torus GS piston 2.

The disadvantage of this device is the presence of gas leaks from the hydropneumoaccumulator due to the rapid deterioration of the seals of the gas joint, which degrades the performance characteristics of the hydraulic adjoining device.

The purpose of the invention is to improve the operational characteristics, i.e., to maintain a predetermined impact energy by eliminating gas leaks from the hydropneumatic accumulator.

To achieve this goal, an additional cylindrical elastic element and an outer cylinder are mounted on the cylinder of the hydropneumoaccumulator;

10, a gas chamber is placed between the above-mentioned elastic element and the inner surface of the outer cylinder, and the space above the piston of the hydro-pneumatic accumulator is filled with a working fluid, and through-holes are made in the walls of the cylinder of the hydro-pneumatic accumulator.

The drawing shows a water hammer device, a slit.

The hydropercussion device includes a housing 1 in se20 b, in which a rod 2 and a piston 3 are placed. Located on the housing 1, the cylindrical elastic locking and regulating element 4, which is a distribution unit, has the possibility of radial deformation and is connected through through holes 5 and 6 7 and overflow 8 cameras. A cup 9 and an inner cylinder 10 in which the piston of the hydropneumatic accumulator 11 is located is connected to the housing 1. Above the element 4 there is an annular control cavity 12 connected by channels 13 and 14 and a groove 15 with a charging chamber 7 and a drain line 16. In the piston hydro-pneumatic accumulator 11 has a groove 17. A choke 18 is located in the channel 13. On the outer surface of the inner cylinder 10 having through channels 19, there is an additional cylindrical elastic element 20 having the possibility of radial deformation. The cylindrical elastic element 20 is fixed at the ends on the outer surface of the inner cylinder 10 by means of the outer cylinder 21. The gas chamber 22 is closed, filled with compressed gas, and is formed by the inner surface of the outer cylinder 21 and the cylindrical corner element 20. In the upper part of the inner cylinder there is a chamber 23, filled with working fluid.

Hydraulic shock device works as follows.

Under the action of the treated medium, by means of the rod 2, the piston of the hydropneumatic accumulator 11 moves overlapping the drain channel 14. In this case, the cylindrical elastic shut-off and regulating element 4 blocks the openings 5 and 6 of the charging 7 and overflow 8 chambers. Part of the liquid from the chamber 23 through the piston of the hydropneumoaccumulator 11 through the channels 19 flows under the cylindrical elastic element 20, causing it to deform and compress the gas in the gas chamber 22. The percussion device is charged. At the end of the platoon, the piston of the hydropneumatic accumulator 11 through the bore 17 connects the control cavity 12 to the drain line 16, the pressure above the cylindrical elastic locking element 4 drops and the holes 5 and 6 are interconnected. Under the action of the compressed gas of the chamber 22, the cylindrical elastic element 20 pushes the liquid underneath it into the chamber 23 through the channels 19. As a result, the hydropneumatic accumulator 11 causes a working stroke, forces the liquid from the charging chamber 7 into the overflow chamber 8 through the channels 5 and b and the space under the cylindrical elastic shut-off and regulating element 4. The pressure build-up in the control cavity 12 is restrained by the throttle 18. Liquid from the overflow chamber 8 is drained during the charging period of the percussion device. Further, the duty cycle is repeated.

The use of a cylindrical elastic element will eliminate the loss of compressed gas in the hydro-pneumatic accumulator of a hydropercussion device, resulting in stabilization of a given impact energy, elimination of devices for replenishing the gas, reducing the likelihood of seizure of the hydro-pneumatic accumulator, and increasing the service life of the hydropercussion device without disassembling due to lack of wear. seals.

Claims (2)

1. USSR Author's Certificate No. 397598, cl. E 21 C 3/20, 1970. 2. USSR author's certificate number 685819, cl. E 21 C 3/20, 1976. (prototype). //