Hydraulic Pump Alternate Power System
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Solution Overview
Problem
Digger/derrick systems operated by diesel engines generate excessive noise, posing a disturbance and hearing hazard, especially in residential and hospital settings, and lack a reliable alternative power source in case of engine failure.
Innovation Solution
A drive system incorporating a centrifugal clutch and a battery bank system that allows the diesel engine to charge batteries while running, enabling the generator/motor to power the hydraulic pump independently of the engine, reducing noise and providing a hybrid mode with zero fossil fuel emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a diesel engine is used to power the hydraulic pump, then the system has sufficient power and reliability, but the noise level increases and causes disturbance and hearing hazards
Solution Approach 1:
The power transmission system is segmented into two independent paths: a mechanical direct-drive path (engine to pump) and an electrical path (engine to generator to motor to pump). This segmentation allows the system to switch between diesel power and battery power, reducing noise pollution while maintaining operational reliability.
Solution Approach 2:
An electrical intermediary system (generator and motor) is introduced between the diesel engine and hydraulic pump. This intermediary enables energy conversion from mechanical to electrical and back, allowing the system to operate quietly using battery power when conditions permit, while the engine remains available as a backup power source.
2Object-affected harmful factors
If a centrifugal clutch is added to enable alternate power operation, then noise is reduced during battery mode, but the device complexity increases
Solution Approach 1:
The centrifugal clutch is designed to automatically engage and disengage based on engine speed conditions without requiring complex electronic controls or sensors. The clutch's inherent centrifugal mechanism self-regulates the power transmission path, reducing system complexity while enabling noise reduction during battery operation.
3Object-generated harmful factors
If a battery bank system is integrated to power the hydraulic pump independently, then emissions are reduced to zero during battery mode, but the device complexity and initial cost increase
Solution Approach 1:
The generator/motor assembly serves multiple functions: it acts as a generator to charge batteries during engine operation, serves as a motor to drive the pump during battery power mode, and provides an intermediary coupling mechanism. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in system complexity.
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
The system effectively reduces noise pollution, maintains operational performance, and offers a backup power source, ensuring continuous operation without diesel engine noise or emissions, enhancing safety and reducing environmental impact.
Implementation Method 1
A centrifugal clutch is provided having at one or more internal flyweights in rotational engagement with the flywheel of the diesel engine
Implementation Method 2
The generator/motor is coaxially mounted to the adapter ring around the axis of rotation. A hydraulic pump is coaxially mounted to the electrical generator/motor
Implementation Method 3
A battery bank system is charged by electrical power from the electrical generator/motor while the diesel engine is running in a diesel mode
Data Source
AI summary
Provided in this disclosure is a digger/derrick system (or generally any type of machine) having a diesel engine to power a hydraulic system for raising and lowering the digger/derrick and powering other components. The system includes a centrifugal clutch that engages the diesel engine while the engine is running, thereby powering an electrical generator that drives the hydraulic pump while also charging an on-board battery bank system. When the engine is turned off, the centrifugal clutch is decoupled. The battery banks then power the generator, which in turn drives the hydraulic pump. In this manner, the digger/derrick offers the advantages of noise reduction as the hydraulic systems can be operated without running a noisy diesel engine. This noise reduction after enhances safety since operators elevated in the derrick and operators on the ground can more readily communicate to give clear warnings to avoid danger and other undesirable circumstances.