Jib Lifting System with Energy Storage Cylinder and Accumulator
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Solution Overview
Problem
Existing lifting systems for the jib of operating machines, such as excavators and cranes, require high energy consumption and inefficiently utilize gravitational potential energy, with previous energy recovery systems being complex and ineffective in quick lifting.
Innovation Solution
A lifting system comprising an energy storage device with an energy storage cylinder and accumulator, which stores gravitational potential energy during jib descent and releases it to lift the jib quickly, using a control cylinder and hydraulic pump to manage the energy storage and release process without additional control valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional lifting systems are used to lift the jib, then the jib can be elevated, but enormous force is required with high energy consumption and relatively low speed
Solution Approach 1:
The system performs preliminary action by storing gravitational potential energy in the accumulator during the jib's descent phase. This stored energy is then released during the subsequent ascent phase, eliminating the need to re-expend the same amount of energy for lifting. The energy recovery process transforms the wasted gravitational energy into useful lifting power, significantly reducing overall energy consumption while maintaining high lifting force capability.
2Loss of energy
If conventional lifting systems are used, then the jib can be elevated, but the gravitational potential energy during descent is wasted and cannot be effectively utilized
Solution Approach 1:
The system converts the harmful waste of gravitational potential energy during descent into a beneficial resource. The accumulator captures the gravitational energy that would otherwise be lost, storing it as pressurized hydraulic fluid. This recovered energy is then deployed during ascent to accelerate the jib's elevation, transforming the previously wasted energy into a performance-enhancing asset that simultaneously reduces energy loss and increases productivity.
3Loss of energy
If energy recovery systems are added to utilize gravitational potential energy, then energy can be recovered, but the system becomes complicated in configuration and inconvenient in operation
Solution Approach 1:
The system merges the energy recovery function with the existing hydraulic control system by integrating the accumulator directly into the hydraulic circuit. The accumulator shares the hydraulic fluid pathway with the control cylinder, eliminating the need for separate energy storage and release systems. This unified configuration reduces the number of independent components and connections, thereby simplifying the overall system structure while maintaining the ability to recover and utilize gravitational potential energy effectively.
4Loss of energy
If energy recovery systems are added, then gravitational potential energy can be recovered, but the recovered energy cannot be effectively released to lift the jib quickly
Solution Approach 1:
The system implements dynamic energy release by controlling the hydraulic fluid flow from the accumulator to the control cylinder based on the jib's operational requirements. The hydraulic distributor dynamically directs the stored energy to the appropriate cylinder chamber, enabling rapid adjustment of lifting speed. This dynamic control mechanism ensures that the recovered energy is released at the optimal rate and timing, maximizing lifting speed when needed while maintaining precise control over the jib's motion.
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 balances the jib's weight, reduces energy consumption, and enhances lifting efficiency by utilizing stored energy, resulting in a simple, reliable, and energy-saving mechanism.
Implementation Method 1
the upper volume of the accumulator is filled with pressurized gas, and the lower volume of the accumulator is filled with pressurized hydraulic oil
Implementation Method 2
the gas in the upper volume of the accumulator is compressed so as to recover the gravitational potential energy of the jib
Implementation Method 3
the compressed gas in the upper volume of the accumulator pushes the hydraulic oil in the lower volume of the accumulator into the lower chamber for energy storage cylinder, and thus the recovered energy is released to push the energy storage piston rod upward for elevating the jib
Implementation Method 4
a hydraulic pump for selectively supplying pressurized hydraulic oil to the upper chamber for control cylinder or the lower chamber for control cylinder through a distributor
Implementation Method 5
when the hydraulic pump supplies the pressurized hydraulic oil to the upper chamber for control cylinder through the distributor, the control piston rod drives the jib to descend
Data Source
AI summary
A lifting system for a jib of an operating machine that includes an energy storage device having an energy storage cylinder and an accumulator, the energy storage cylinder having an upper chamber, a lower chamber, and an energy storage piston rod connected to the jib. The upper part of the accumulator is filled with gas, and the lower part of the accumulator is filled with hydraulic oil and communicates with the lower chamber of the energy storage cylinder. The lifting system also includes a hydraulic pump and a control cylinder for controlling the lifting of the jib, which comprises an upper chamber, a lower chamber, and a control piston rod connected to the jib.