RU2151837C1 - Roll of vibration roller - Google Patents

Abstract

FIELD: road building machinery; compacting of road pavements, bases and ground. SUBSTANCE: roll installed on ballast weight trunnions rests on rollers of upper and lower carriages. Preloaded flexible hydraulic chambers installed between carriages and ballast weight are connected through pipelines and hydraulic distributor with hydraulic pulser. Vibration of roll is provided by expansion compression of flexible hydraulic chambers preloaded by pressure of working liquid which leads to displacement of upper and (or) lower carriages pushing the roll by rollers and making it vibrate relative to ballast weight. EFFECT: increased reliability and enlarged operating capabilities of compacting roller. 3 dwg

Description

 The invention relates to construction equipment, and in particular to machines for compaction of pavements, bases and soil.

 Known drum vibratory roller (ed. St. USSR N 1506009, CL, E 01 C 19/28, 1989), containing a stationary hollow axis, a cylindrical body, in the cavity of which is located an inertial mass vertically movable relative to the body, and a hydraulic vibration exciter.

 The disadvantage of this device is the ability to work only in vertical mode.

 The closest in technical essence to the claimed invention is a self-propelled vibration roller (ed. St. USSR N 1245641, class E 01 C 19/28, E 02 D 3/026, 1986), the roller of which is made with transverse ribs on the inner surface, and vibration exciters of circular vibrations are offset from the axis of rotation of the drum in opposite directions by 0.50 ... 0.75 of the radius of the latter.

 A disadvantage of the known device is the ability to work only in the mode of torsional vibrations.

 An object of the invention is to expand the scope of the compactor: compaction of thin layers of asphalt concrete mix and soil with oscillating (torsional) vibrations and compaction of the soil to a greater depth in cramped conditions with vertical directional vibrations, as well as increasing the reliability of the vibrator design.

 This goal is achieved by the fact that the roller is mounted on the trunnions of the ballast and rests on the rollers of the upper and lower carriages, and between the carriages and the ballast are pre-loaded elastic hydraulic chambers connected by pipelines through the valve with a hydraulic pulsator.

 The proposed vibratory mechanism of the roller has great design reliability due to the absence of friction surfaces and bearing assemblies and allows the vibratory roll to operate in two modes: with oscillating and directional vertical vibrations.

The invention is illustrated by drawings, where:
in FIG. 1 shows a longitudinal section AA of a vibration roller;
in FIG. 2 is a cross section BB of the vibratory roller;
in FIG. 3 is a hydraulic diagram of a vibratory drum.

 The vibration roller of the roller consists of a roller 1 mounted on bearings 2 on hollow trunnions 3, fixed at one end through shock absorbers 4 on ballast 5, and the other on frame 6. Between roller 1 and ballast 5 are installed upper 7 and lower 8 carriages, on axles 9 of which the rollers 10 are mounted rotatably, and between the upper 7, lower 8 carriages and ballast 5, pre-tensioned elastic hydraulic chambers 11, 12, 13 and 14 are installed, muffled by plugs 15 and 16 from one end and through fittings 17 from the other end and 18 connected by pipelines 19 and 20 through a two-position hydraulic distributor 21 with a hydraulic pulsator 22, including a shaft 23 with an eccentric 24 and hydraulic cylinders 25 and 26 with pistons 27 and 28.

 The vibration roller of the roller operates as follows.

 When the roller is moving, roller 1 rolls over the material being compacted. The vibratory mechanism of the roller can operate in two modes: in the directional vertical vibrations mode and in the mode of oscillating (torsional) vibrations.

 When the roller is operating in the direction of vertical oscillations, the spool valve 21 is installed in position A, the eccentric 24 of the hydraulic pulsator 22 rotating on the shaft 23 pushes the working fluid into the pipelines 19 with the piston 27 from the hydraulic cylinder 25, and the pre-compressed elastic chambers 11 and 12 inflate and repel them the upper carriage 1 and through its rollers 10 the roller 1 is up from the ballast 5. After turning the shaft 23 by half a turn, the eccentric 24 pushes the piston 28 into the hydraulic cylinder 26, the fluid pressure in t uboprovode 20 increases, the elastic chambers 13 and 14 are inflated and push the lower carriage 8 and through its rollers 10 roll 1 downwardly from the ballast 5.

 When the vibration roller is operating in the mode of oscillating vibrations, the control valve spool 21 is set to position B, the eccentric 24 pushes the working fluid into the elastic chambers 11 and 13 with the piston 27 from the hydraulic cylinder 25, the upper 7 and lower 8 carriages rotate clockwise relative to the axis of rotation of the roller 1. After turning the shaft 23 by half a turn, the working fluid is supplied to the elastic chambers 12 and 14, the upper 7 and lower 8 of the carriage rotate counterclockwise relative to the axis of rotation of the roller 1.

 The application of the proposed vibratory roller on the rollers will expand the scope of their application, compact asphalt coatings, soils and base material of various thicknesses. The proposed vibratory mechanism of the roller has great design reliability due to the absence of friction surfaces and bearing assemblies.

Claims (1)

 The roller vibrating roller, consisting of a roller mounted on ballast trunnions, characterized in that the roller rests on the rollers of the upper and lower carriages, and preloaded elastic hydraulic chambers are installed between the carriages and the ballast, connected by pipelines through a hydraulic on / off distributor with a hydraulic pulsator.

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