Luoyang Laojian Heavy Machinery Co., Ltd.

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Structural Features of Vibratory Rollers

2023-01-12 14:59

【文章概要】Various types of vibratory rollers are equipped with excitation devices within the compaction unit. When the vibratory roller is in operation, the exciter is energized, generating a vibrational force. Under the action of this force, the vibrating drum produces a specific amplitude and frequency of vibration, which, together with its stroke, exerts compactive pressure on the material being compacted. Static rollers and tire rollers, by contrast, do not rely on mechanical pressure; instead, they achieve compaction through negative pressure generated by their structural design. Because vibratory rollers incorporate an internal vibration source, their compaction mechanism differs fundamentally from that of static rollers. Typically, the vibrator of a vibratory roller consists of a vibration shaft and a set of eccentric weights mounted on it, with adjustable shaft mass and eccentricity. During operation, the vibration shaft drives the eccentric weights to rotate, and the centripetal force produced by these weights generates a vibrational force that acts on the road‑rolling system. Under this vibrational force, the drum undergoes forced vibrations at a frequency equal to the number of cycles of the applied force. Throughout the period of forced vibration, the resulting vibrational pressure waves propagate rapidly through the soil layers, causing both the material and the drum to vibrate in unison, thereby forming a “rolling-body” vibration system.

Various types of vibratory rollers are equipped with excitation devices within the compaction unit. When the vibratory roller is in operation, the exciter is energized, generating a vibrational force. Under the action of this force, the vibrating drum produces a specific amplitude and frequency of vibration, which, together with its stroke, exerts compactive pressure on the material being compacted. Static rollers and tire rollers, by contrast, do not rely on mechanical pressure; instead, they achieve compaction through negative pressure generated by their structural design. Because vibratory rollers incorporate an internal vibration source, their compaction mechanism differs fundamentally from that of static rollers. Typically, the vibrator of a vibratory roller consists of a vibration shaft and a set of eccentric weights mounted on it, with adjustable shaft mass and eccentricity. During operation, the vibration shaft drives the eccentric weights to rotate, and the centripetal force produced by these weights generates the vibrational force acting on the road‑rolling system. Under this force, the vibrating drum induces forced vibrations, with a frequency equal to the number of cycles of the applied force. During each cycle of forced vibration, the resulting vibrational pressure waves propagate rapidly through the soil layers, causing both the material and the drum to vibrate in unison—thus forming a “rolling-body” vibration system.

What preparations must be made when operating a vibratory roller?

1. Inspect the fastened components at all connection points to determine whether any are loose.

2. For water-cooled diesel engines, verify that the cooling system is fully filled with coolant and check for any leaks at the quick‑connect hose fittings. For air‑cooled diesel engines, ensure that the engine drive belt is not loose.

3. Check the oil and fuel levels of the diesel engine to ensure that it has sufficient engine oil and diesel fuel for operation.

4. Inspect the battery.

5. Check the oil level in the hydraulic oil filter element to ensure that the gear oil level is at the position indicated on the oil level gauge.

6. Inspect the grease in gear‑driven components such as the transmission, transfer case, and drive axles, and if necessary, drain the old lubricant and refill with the specified grade of oil.

7. Inspect the sealing condition of the three-way fittings in the diesel engine’s fuel and lubrication systems, as well as in all hydraulic systems; any areas exhibiting oil leakage must be promptly repaired.

8. Check the stability of the braking system and ensure the tire pressure meets the specified standard (if the rear tires are drive wheels).

9. If a vibratory roller is left idle for an extended period, before restarting it, inspect the grease, gear oil, and diesel engine oil to ensure they have not deteriorated. If any of these lubricants have degraded, thoroughly clean all relevant components of the equipment, replace the old oils with fresh ones, and replenish the lubrication system with new grease or oil according to the lubrication schedule.

10. Inspect the electrical equipment system, dashboard, lighting effects, and other components.

11. Adjust the driver’s seat to ensure easy and convenient operation of all control levers during work.

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Precautions for Operating Small Vibratory Rollers

Vibratory rollers offer the following advantages:

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