Multi-Stage Electric Gas Pump Eccentric Shaft Design
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Solution Overview
Problem
Conventional electric gas pumps are large, heavy, and inefficient, requiring high energy consumption and having poor start-up performance, making them unsuitable for fields requiring small to medium gas flows and high pressure.
Innovation Solution
A multi-stage electric gas pump with an eccentric shaft and interconnected cylinders, where the eccentric shaft drives piston rods in the cylinders to create a multi-stage pressurization system, optimizing size, integration, start-up speed, and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a conventional electric gas pump is used to provide high pressure gas source, then the gas pressure can be achieved, but the pump becomes large in size and heavy
Solution Approach 1:
The gas pump is divided into multiple compression stages (first compression stage, second compression stage, third compression stage), each handling a portion of the pressure increase. This segmentation allows the system to achieve high pressure output while keeping each individual stage compact, thereby reducing the overall pump size compared to a single-stage design.
Solution Approach 2:
The patent employs a nested arrangement where the second cylinder is positioned within or alongside the first cylinder, and the third cylinder is positioned within or alongside the second cylinder. This nesting of cylinders and compression stages allows multiple functional components to occupy overlapping or adjacent spatial volumes, significantly reducing the external dimensions and overall size of the pump while maintaining high pressure capability.
2Stress or pressure
If a conventional electric gas pump is used to provide high pressure gas source, then the gas pressure can be achieved, but the pump becomes heavy
Solution Approach 1:
By dividing the compression process into multiple stages with separate cylinders and piston rods, the mass of individual moving components is reduced compared to a single large piston. This segmentation distributes the mechanical load and reduces the weight of each moving part, thereby reducing the overall pump weight while achieving the same high pressure output.
Solution Approach 2:
The nested arrangement of cylinders allows the system to achieve high pressure capability without proportionally increasing weight. By nesting the second and third cylinders within or alongside the first and second cylinders respectively, the patent minimizes the total material volume and structural mass required, thereby reducing overall pump weight while maintaining high pressure performance.
3Stress or pressure
If a conventional electric gas pump is used in fields requiring small to medium gas flows and high pressure, then high pressure can be achieved, but the energy consumption becomes relatively large
Solution Approach 1:
The multi-stage compression process divides the total pressure increase into smaller incremental steps across three stages. This segmentation allows each stage to operate at lower pressure differentials, improving the efficiency of each compression step and reducing the total energy consumption compared to a single-stage compression that would require high energy input to achieve the same final pressure.
Solution Approach 2:
The patent employs multiple cylinders operating in sequence or parallel to provide continuous compression action. This continuous multi-stage compression process maintains efficient energy transfer throughout the compression cycle, reducing energy losses and improving overall energy efficiency for achieving high pressure at small to medium gas flows.
4Stress or pressure
If a conventional electric gas pump is used in fields requiring small to medium gas flows and high pressure, then high pressure can be achieved, but the start-up performance becomes poor
Solution Approach 1:
The multi-stage compression system allows the pump to build pressure in incremental steps rather than requiring a single large pressure jump at start-up. This segmented approach improves start-up performance by reducing the initial torque requirement and allowing the motor to accelerate the system more quickly through manageable pressure stages, thereby improving overall start-up speed and performance.
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 multi-stage electric gas pump is compact, highly integrated, fast to start, and low in energy consumption, providing a high-pressure gas source suitable for specific fields, including portable high-pressure calibration devices.
Implementation Method 1
an eccentric shaft comprising a main body having a longitudinal axis, a first eccentric portion, and a second eccentric portion... The eccentric shaft is driven by the driving mechanism to produce a first circular movement of the first eccentric portion performed around the longitudinal axis and a second circular movement of the second eccentric portion performed around the longitudinal axis
Implementation Method 2
The first piston rod is connected to the first eccentric portion and is configured to reciprocate in response to the first circular movement of the first eccentric portion of the eccentric shaft so as to periodically pressurize gas drawn into the first chamber
Data Source
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AI summary
A multi-stage electric gas pump includes an eccentric shaft including a main body having a longitudinal axis, a first eccentric portion, and a second eccentric portion, wherein the first eccentric portion and the second eccentric portion are fixed on the main body. The eccentric shaft is driven by a driving mechanism to produce a first circular movement of the first eccentric portion around the longitudinal axis and a second circular movement of the second eccentric portion around the longitudinal axis, wherein the second circular movement is synchronized with the first circular movement. The multi-stage electric gas pump further includes a first cylinder, a second cylinder, and a third cylinder. The cylinders in three stages are driven by the eccentric shaft so as to achieve three-stage pressurization of gas.