Working Principle Of Yz-110d Hydraulic Vibratory Pile Driver

The YZ-110D vibro hammer uses synchronized eccentric blocks to focus vibration on the pile-driving axis. The horizontal centrifugal forces cancel each other, while the vertical components add together. This force arrangement determines how efficiently hydraulic power becomes pile-driving energy. Eccentric moment, rotational speed, amplitude, centrifugal force, and hydraulic flow must therefore be matched as one system.

How the Eccentric Block System Works

A hydraulic vibratory hammer produces vibration through rotating eccentric masses. Each rotating mass creates centrifugal force according to its mass, rotation radius, and angular velocity.

When two eccentric blocks rotate in synchronization, their force vectors produce the required directional effect:

🔹 Horizontal force components oppose each other and reduce lateral movement.

🔹 Vertical force components act in the same direction and generate axial excitation.

🔹 The combined force transfers vibration through the clamp and pile into the surrounding soil.

This mechanism allows a hydraulic vibro hammer to generate continuous excitation instead of relying on repeated impact.

Main Design Parameters of YZ-110D

The published YZ-110D configuration lists a 32 kgm eccentric moment, maximum frequency of 1,800 rpm, centrifugal force of 1,140 kN, maximum amplitude of 33 mm, and maximum line pull of 600 kN. Its maximum oil flow is listed at 480 L/min.

These parameters should be evaluated together rather than separately. Increasing rotational speed, for example, changes excitation frequency and centrifugal force, while the hydraulic system must provide sufficient flow and pressure to maintain motor performance.

Frequency, Amplitude, and Energy Transfer

A small vibratory hammer needs efficient energy transmission because its available machine mass is limited. Frequency and amplitude directly affect pile-soil interaction.

Three factors require attention

1. Frequency: Higher rotational speed increases the number of vibration cycles per unit time.
2. Amplitude: Greater displacement changes the motion transmitted to the pile.
3. Centrifugal force: Higher dynamic force increases the mechanical excitation available for pile installation or extraction.

The correct combination depends on pile type, soil resistance, clamp performance, and machine operating conditions.

Hydraulic and Mechanical Matching

A vibrohammer is both a hydraulic and mechanical system. Hydraulic flow controls motor speed, while hydraulic pressure affects the torque available under load.

The published 480 L/min maximum oil flow therefore has to be considered when selecting the hydraulic power source. Shaft alignment, bearing condition, lubrication, cooling, and gearbox performance also affect vibration stability.

Poor matching can cause speed loss, excessive heat, mechanical vibration, or reduced pile-driving efficiency.

Practical Design Checks

Before operation, the following checks provide a practical starting point:

1. Verify that centrifugal force is suitable for the pile and expected soil resistance.
2. Check that vibration amplitude remains within the limits of the pile, clamp, and connected structure.
3. Confirm hydraulic flow and pressure match the motor requirements.
4. Check carrier capacity, lifting stability, and clamp holding force.
5. Inspect eccentric shafts, bearings, lubrication, and synchronization before continuous operation.

How Does a Vibro Hammer Drive a Pile?

• Load transfer: The vibrating assembly passes mechanical motion through the clamp into the pile.

• Soil response: Repeated oscillation changes the contact conditions between the pile surface and surrounding soil.

• Installation control: Operating settings can be adjusted according to pile behavior, ground resistance, and equipment response.

• System stability: Consistent rotation and structural alignment support predictable machine behavior during continuous cycles.

• Application flexibility: The same operating concept can be adapted to pile installation, extraction, and different pile configurations.

The product is suitable for use with the 500P Hydraulic Power Pack for Hydraulic Piling Hammer. Matching the hammer with an appropriate hydraulic power source can maintain stable operating conditions and support consistent performance during pile installation or extraction. The hydraulic circuit should be checked for flow, pressure, and connection compatibility before operation.

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.