Linear Electric Piling Hammer for Tilted Pile Striking

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Solution Overview

Problem

Hydraulic piling hammers suffer from low energy efficiency (around 70%), hydraulic oil disposal issues, limited energy transfer, and reduced effectiveness in tilted processing due to gravity direction mismatches.

Innovation Solution

A piling hammer using a linear electric machine with a mover connected to a ram block, controlled by a processor to determine and deliver kinetic energy for striking, incorporating regenerative braking to recover energy, and a design that minimizes eddy currents for improved efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If hydraulic type hammers are used for driving piles, then the hammer can deliver striking force to the pile, but energy efficiency is low (around 70%) and hydraulic oil disposal and pollution problems occur

Engineering Contradiction:

Improveenergy efficiencyVSAvoidhydraulic oil pollution

Core Design Contradiction:

Loss of energyVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the hydraulic system with an electric motor-driven system. The electric motor directly drives the striking hammer through a drive mechanism, eliminating the need for hydraulic oil and associated pollution problems while improving energy efficiency through direct electrical-to-mechanical energy conversion.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent eliminates the hydraulic system entirely in favor of an electric drive system, thereby removing the source of hydraulic oil pollution and improving energy efficiency by avoiding the energy losses inherent in hydraulic fluid transmission.

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Power

If the striking hammer speed is limited to slightly higher than free fall, then the hammer structure remains simple, but the energy transfer capability is limited and very heavy striking hammers are required for large sized piles

Engineering Contradiction:

Improveenergy transfer capabilityVSAvoidstriking hammer weight

Core Design Contradiction:

PowerVSWeight of moving object

Solution Approach 1:

The patent employs a dynamically controlled striking system where the electric motor can vary the speed and acceleration of the striking hammer. This allows optimization of the striking velocity to maximize energy transfer efficiency, enabling lighter hammers to achieve the same effective energy delivery that would require much heavier hammers in free-fall systems.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters of the striking hammer by using an electric motor to control velocity, acceleration, and striking frequency. This enables precise adjustment of kinetic energy delivery, allowing smaller, lighter hammers to achieve high energy transfer efficiency through optimized motion parameters rather than relying solely on mass.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If tilted processing is performed with conventional hammers, then the hammer can reach tilted piles, but the force of gravity does not act in the same direction as the striking hammer moves, reducing effectiveness

Engineering Contradiction:

Improvetilted processing capabilityVSAvoidstriking effectiveness

Core Design Contradiction:

Adaptability or versatilityVSPower

Solution Approach 1:

The patent replaces gravity-dependent free-fall striking with an electric motor-driven system that can actively control the striking direction and force. This allows the hammer to maintain effective striking power on tilted piles by using motor force rather than relying on gravity, which does not align with the striking direction in tilted operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances energy efficiency, reduces environmental impact, and maintains effectiveness in tilted operations by optimizing energy transfer and recycling kinetic energy.

Implementation Method 1

a linear electric machine (100) comprising a mover (101) connected to a ram block (332) for striking a pile

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Implementation Method 2

The support element (111) comprises material whose electrical conductivity, S/m, is less than that of the solid metal of the frame-portion (110)... minimizing eddy currents

Methodology Applied

Scientific EffectEddy currents: Eddy Currents

Data Source

PatentUS12612753B2Piling hammer and method for striking pile

Publication Date: 2026.04.28 JUNTTAN OY

AI summary

There is provided a linear electric machine comprising a mover connected to a ram block for striking a pile, a processor operatively connected to the linear electric machine and configured to determine a total target kinetic energy for striking a pile using a ram block connected to a mover of a linear electric machine of the piling hammer, determine a first portion of the total target kinetic energy for striking the pile at least based on a mass of the ram block, determine a second portion of the total target kinetic energy for striking the pile based on the total target kinetic energy and the first portion of the total target kinetic energy, and control the linear electric machine to accelerate the mover based on the determined second portion of the kinetic energy for striking the pile by the linear electric machine.