Working Principle And Application Of Yz-90d Hydraulic Vibratory Pile Driver

For the YZ-90D, effective pile driving requires three actions: (1) match hydraulic power to 350 L/min flow, (2) select single or double clamp per pile type, and (3) adjust frequency up to 1800 RPM to soil resonance. This delivers 920 kN centrifugal force from 26 kg·m eccentric moment, liquefying soil for rapid penetration. The 400 kN line pull enables extraction, serving bridges, marine works, and urban shoring.

Operating Principle

• Opposing eccentric blocks cancel horizontal forces and double vertical excitation. With 32 mm amplitude, the hydraulic vibro hammer（YZ-90D） breaks soil cohesion in clays.

• The 1800 RPM frequency matches natural resonance in granular soils, reducing intergranular friction. The pile penetrates under excavator static pressure, quieter than impact hammers.

• The 920 kN force drives steel and concrete piles up to 800 mm in medium-dense soils.

Specifications

The 500 mm width suits standard excavators. Single clamp for round pipes, double for sheet piles and H-beams.

Power and Control

The vibro hammer with hydraulic power pack needs steady 350 L/min flow with cooling and filtration. Proportional valves adjust frequency from idle to 1800 RPM – lower for clays, higher for sands. Forced lubrication dissipates heat, outperforming fixed-speed electric models in adaptability.

Applications

Driving pipe piles for bridge piers and marine fendering requires consistent force – the 920 kN and 400 kN pull handle these efficiently. For urban retaining walls, the hydraulic vibrating hammer produces low ground vibration; the double clamp grips U-type and Z-type sheets securely near existing structures.

Efficiency and Maintenance

• Penetration rates reach 2–4 m/min in sands and gravels; 32 mm amplitude overcomes skin friction, cutting rig time versus impact hammers.

• The 400 kN line pull extracts casing and sheet piles for reuse, lowering material costs.

• Clean oil and regular filtration prevent valve clogging; monitor cooling below 80°C.

• Inspect bearings and gearbox every 500 hours – amplitude decline signals wear, prompting rebuilds. Forced lubrication extends intervals, yet proactive replacement avoids downtime.

Performance Overview

The YZ-90D produces 920 kN at 1800 RPM from 26 kg·m eccentric moment, with 32 mm amplitude and 400 kN line pull. Its 2800 kg design and clamp options suit bridge, marine, and urban driving; 350 L/min oil flow ensures consistent power for both driving and extraction.

Selection Guidelines

Match eccentric moment and frequency to soil and pile size. The 26 kg·m moment fits medium to large piles; frequency range covers granular and cohesive soils. Ensure the power pack supplies 350 L/min. Choose clamp type accordingly – single for round, double for sheet or H-sections. Geotechnical investigation prevents over-driving or inadequate penetration.

Field trials on representative soils provide optimal frequency and flow settings. Stratigraphy changes often require real-time adjustments beyond factory recommendations.

1. Run test drives at multiple frequency points to identify the most efficient setting for the specific soil profile.

2. Log oil temperature and amplitude readings every two hours during continuous operation to catch wear early.

3. Match clamp selection to pile profile before mobilization – single for round sections, double for sheet and H-beams.

These measures reduce wear, maximize daily output, and turn theoretical capability into reliable field performance. The YZ-90D pairs with the 400P hydraulic power pack for hydraulic piling hammer operations.

Operating Principle

The vibro hammer generates huge vibratory force through the eccentric blocks. The eccentric blocks rotate at a high speed through hydraulic power pack.

And the high-frequency vibration generates the centrifugal force.

This centrifugal force can "liquefy" the soil around the pile so that the pile can fall into the soil under hammer weight or excavator pressure.

Detailed Introduction

Product Features

 EFFICIENCY

Due to the design principle of hydraulic vibro hammer, eccentric blocks of hammer vibrate at a high speed to produce large force. Then vibratory hammer can achieve driving or extracting of piles. It's more efficient and faster than excavator hammer or electric vibro hammer.

 PERFORMANCE

YONGAN hydraulic vibratory hammer uses a special design and production for key components, and provides additional driving and extracting performance on the basis of the world's average pilings.

 LIGHTWEIGHT

Because vibro hammer force comes from power pack, hrdraulic vibro hammer body is very light. For example, YZ-180B uses an embedded motor and its width is only 530mm, weight only 5900kg. It can easily work in a narrow space while max centrifugal force is 2340kN.

 ENVIRONMENTAL

Compared with diesel and automatic hammers, YONGAN hydraulic vibro hammers are green and don't disturb resident. Vibro hammer force directly transfers to pilings. Due to sound-proof design, YONGAN power pack can absorb 75% engine noise and use CAT, Cummins, volvo engine under the national emission standards.

 STABLIZATION

The large capacity cooling system ensures that hydraulic vibro hammer can work efficiently and stably. Even if it keeps working for a long time, there won't be seriously overheated. Besides, gearbox adopts forced lubrication system design, which can not only fully lubricate components but also take away the heat produced by the high-speed operation of the components.

 DURABILITY

YONGAN hammers uses precise workmanship for electric and hydraulic systems including hoses, cables, couplings and other related parts. Thus YONGAN hammers have a long service life with minimal downtime and the whole system is reliable. For wear parts, YONGAN only choose high-quality consumable parts to assure equipments long-term working life to save customers'money. 

Equipment Selection Chart

Key Vibration Technology Data and Formula

Piling Project Example for YZ-90D Hydraulic Vibro Pile Driving & Extracting Hammer