Hydraulic Pumping Cylinder Variable Displacement for Energy Efficiency
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Solution Overview
Problem
Current hydraulic pumping systems are inefficient and costly, wasting time and energy by moving the output piston at the same rate under both loaded and no-load conditions, and are complex due to the use of many hydraulic components.
Innovation Solution
A hydraulic pumping cylinder system with a frame, pump, rod, housing, piston, and valves that allows for a large volume of fluid movement under low pressure and rapid engagement with a load by adjusting fluid flow based on pressure resistance, featuring a rod and piston with different cross-sectional areas and check valves to manage fluid flow efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the output piston moves at the same rate under both loaded and no-load conditions, then the system structure is simple, but time and energy are wasted
Solution Approach 1:
The patent applies dynamics by making the pump's effective displacement area variable rather than fixed. The system transitions between two operational modes: high-volume low-pressure mode (when no load is present) and low-volume high-pressure mode (when load is encountered). This dynamic adaptation allows the output piston to move rapidly during positioning while conserving energy during load engagement, resolving the contradiction between speed and energy waste.
Solution Approach 2:
The patent changes the parameter of pump displacement area based on operating conditions. By switching between utilizing the full piston area (for rapid positioning) and the reduced rod area (for high-pressure pumping), the system optimizes both speed and energy efficiency. This parameter change enables the system to adapt its performance characteristics to match the actual workload requirements.
2Ease of operation
If many hydraulic components are used to control fluid flow, then fluid flow can be precisely controlled, but the system becomes complex and expensive to manufacture
Solution Approach 1:
The patent extracts and eliminates unnecessary hydraulic components from the system. Instead of using multiple valves and complex flow control mechanisms, the invention utilizes the inherent structural features of the pump itself—the piston and rod areas—to provide flow control. This extraction of essential functions from separate components simplifies the overall system while maintaining precise fluid flow control capabilities.
Solution Approach 2:
The patent makes the pump structure multi-functional by designing it to perform both high-volume positioning and high-pressure pumping functions without requiring separate control systems. The same pump mechanism, by simply changing which area (piston or rod) is effective, provides both rapid positioning and load-lifting capabilities, eliminating the need for multiple specialized components.
3Productivity
If the pump uses the full piston area for fluid displacement, then large volume of fluid is moved rapidly, but high pressure cannot be achieved when load is encountered
Solution Approach 1:
The patent applies dynamics by making the effective pump area variable rather than fixed. The system transitions between two operational modes: high-volume low-pressure mode (when no load is present) and low-volume high-pressure mode (when load is encountered). This dynamic adaptation allows the output piston to move rapidly during positioning while conserving energy during load engagement, resolving the contradiction between speed and energy waste.
Solution Approach 2:
The patent changes the parameter of pump displacement area based on operating conditions. By switching between utilizing the full piston area (for rapid positioning) and the reduced rod area (for high-pressure pumping), the system optimizes both speed and energy efficiency. This parameter change enables the system to adapt its performance characteristics to match the actual workload requirements.
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 efficiently moves a large volume of hydraulic fluid under low pressure and rapidly engages loads, reducing energy waste and manufacturing costs while maintaining reliability.
Implementation Method 1
The piston, the rod and the valves are arranged to provide a first hydraulic fluid flow associated with the cross-sectional area of the piston until a predetermined pressure is reached and a second hydraulic fluid flow associated with the cross-sectional area of the rod after the predetermined pressure is reached
Implementation Method 2
The plurality of valves each are fluidly connected to the rod side chamber and/or the piston side chamber
Data Source
AI summary
A hydraulic jack including a frame and a pump connected to the frame. The pump includes a rod, a housing, a piston and a plurality of valves. The rod has a cross-sectional area. The housing has an end through which the rod slides. The piston is associated with said rod, with the piston establishing a rod side chamber and a piston side chamber within the housing. The piston having a cross-sectional area. The plurality of valves each are fluidly connected to the rod side chamber and/or the piston side chamber. The piston, the rod and the valves are arranged to provide a first hydraulic fluid flow associated with the cross-sectional area of the piston until a predetermined pressure is reached and a second hydraulic fluid flow associated with the cross-sectional area of the rod after the predetermined pressure is reached.