RU2716343C1 - Compacting roller - Google Patents

Abstract

FIELD: machine building.SUBSTANCE: invention relates to machine building, particularly, to compacting of soil and pavement. Represents a strong housing, in which there is an electrohydraulic chamber with electrodes, hydraulic accumulator, pistons with rods and in one of the pistons there are valves for interaction of hydraulic accumulator with electrohydraulic chamber. Working element is made in form of rollers or impact plate. In upper part of device there are two levers interacting with rods of pistons and working element. Device can operate both in static controlled mode and in vibrator mode.EFFECT: broader functional capabilities and higher efficiency.2 cl, 2 dwg

Description

The invention relates to mechanical engineering, in particular to machines for compacting soil, pavement, building materials.

Known tamper (p. 2114954 C1) for soil compaction, road surface, containing a working body in the form of a tamper plate, a housing with a hydraulic cylinder, a hydraulic pulsator.

The device is material intensive.

The device only works in vibration mode.

A device is known (patent for method No. 2157893 C2, Fig. 1, p. 2-3), comprising a cylinder-shaped body, an electro-hydraulic chamber with electrodes, a piston-type actuator with a rod, and an operating element in the form of an inertioid.

The specified device has a simpler design, but can also only work in vibration mode.

All these devices have a low efficiency, since they use the pressure of electro-hydraulic shock not fully from both its sides.

The objective of the invention is the expansion of functionality and increase the efficiency.

The technical result is achieved in that the device comprising a steel case with an electro-hydraulic chamber with electrodes, a drive in the form of pistons with rods, is equipped with a hydraulic accumulator with hydraulic valves, levers made in the upper part of the body and acting on the working body through the rods or stops that the device comprising a steel casing with an electro-hydraulic chamber with electrodes, a piston drive with rods, equipped with levers made in the upper part of the piston and acting on the working body cut stems.

In FIG. 1 - skating rink with a cut.

In FIG. 2 - tamper.

The device, like a roller, consists of a frame 1, in the upper part of which on the axes 2 there are levers 3 and 4, stops 5, 6 with springs 7, 8. The frame 1 is supported on the axis of the rollers 9. Between the lower and upper bases of the frame 1 is made electro-hydraulic a chamber 10 formed by the walls of the housing 11, pistons 12, 13 with rods 14, 15. The chamber 10 is provided with electrodes 16, 17 connected to a current pulse generator (not shown). A check valve 18 and a reduction controlled hydraulic valve 19 are made in the piston, which connect the chamber 10 to the hydraulic accumulator 20. The chamber 10 is equipped with an electromagnetic valve (crane) 21 connecting it through the labyrinth brake channel 22 to the reservoir 23. The upper part of the frame 1 together with levers 3, 4 covered by a casing 24.

The device as a tamper (Fig. 2) is additionally equipped, instead of the stops 5, 6 with rods 25, 26 with springs 27, 28, a working body, an impact plate 29.

The device operates as follows.

Like a roller, the device can operate with drum vibration without vibration in static mode. In vibration mode, voltage and current pulses are supplied to the electrodes 16, 17 from a current pulse generator. In this case, between the electrodes 16, 17 there is a spark in the liquid and electro-hydraulic shock. A cavitation cavity is formed, a shock wave directed mainly to the pistons 12, 13. The piston 12 through 14, the levers 3, 4, the stops 5, 6 transmit the force to the frame 1, which transfers the force, pressure to the rollers 9 through their axes.

When a current pulse is removed, the cavitation cavity collapses and a repeated water hammer in the liquid. The pressure in the chamber 10 drops. The pistons 12, 13 are brought to their initial position by springs 7, 8. Next, a new supply of current and voltage pulses, a new cycle.

The frequency of the cycles, the force and the amplitude of the pressure on the pistons 12, 13 are regulated and determined by the frequency and amplitude of the current pulse, pre-set stiffness of the springs 7, 8, stops 5, 6.

When current pulses are applied to the electrodes 16, 17, the pressure in the chamber 10 rises, the hydraulic valve 18 in the piston 13 opens and the liquid from the chamber 10 enters the hydraulic accumulator 20, feeding it. Upon reaching the accumulator 20, comparable with the maximum pressure in the chamber 10, the hydraulic valve 18 closes. In operating mode of the roller with vibration, valve 21 is open. Labyrinth channel 22 dampens shock waves. The excess gas in the chamber 10 is removed through the channel 22, cools the liquid of the chamber 10, condenses in the channel 22 and the reservoir 23, and the gases leave the reservoir 23 through the channel 22 and the reservoir 23 is fed with liquid of the chamber 10.

In the static mode of operation of the rink, current and voltage pulses are not supplied to the electrodes 16, 17. The pressure reducing valve 19 opens and is set to a specific pressure in the chamber 10. The valve 21 is closed. The pressure in the chamber 10, the pressure exerted on the pistons 12, 13, and ultimately on the rollers 9, is set and regulated by a pressure-controlled, controlled by a hydraulic valve 19. If necessary, the pressure in the hydraulic accumulator 20 is maintained by briefly activating the vibration mode.

In the operation mode of the device, such as tamping, current and voltage pulses are supplied to the electrodes 16, 17. By adjusting the frequency and amplitude of the current and voltage pulses, the force and nature of the impact on the shock plate 29 are changed by rods 15, 25, 26.

When the impact plate 29 moves downward, the springs 27, 28 are compressed, which, after the action on the plate 29 disappears, return the pistons 12, 13, rods 15, 25, 26 and the plate 29 to their original position. This is followed by new cycles.

The device, with its simplicity and low material consumption, allows you to compact groups, road surfaces with adjustable exposure of the working body to the object in both static and vibration modes of compaction with maximum use of the energy of shock waves and the movement of fluid from opposite directions, which increases the efficiency. In the static mode of operation of the roller, when changing the effect on the soil, it is not necessary to increase the mass and force of the roller by, for example, moving or removing ballast. The device can be used additionally as a press, pump, engine and in various drives of machines.

Claims (2)

1. A roller containing a steel casing with an electro-hydraulic chamber with electrodes, a piston drive with a rod, a working body, characterized in that the device is equipped with a hydraulic accumulator, levers made in the casing and acting through the rods on the working body, valves are made in the piston. 2. A rammer comprising a steel casing with an electro-hydraulic chamber with electrodes, a piston drive with a rod, a working body, characterized in that the device is equipped with levers made in the upper part of the housing, interacting with the working body, the shock plate through two rods.

Images