Two-Stage High-Pressure Pump Sealing and Force Balance
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Solution Overview
Problem
Existing air pumps fail to meet the increasing demand for higher air pressure and exhibit poor sealing performance, making them inadequate for modern applications.
Innovation Solution
A two-stage high-pressure pump design featuring a motor, noise attenuating filters, a reduction gearbox, and radially offset primary and secondary cylinders and pistons, which apply balanced forces, conserve energy, and enhance sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a single-stage pump design is used, then the structure is simple, but the output air pressure is insufficient
Solution Approach 1:
The pump is divided into two independent compression stages: a first compression cavity with a first piston and a second compression cavity with a second piston. Each stage independently compresses gas, with the first stage achieving intermediate pressure and the second stage achieving final high pressure. This segmentation allows the system to generate sufficient output pressure while maintaining manageable structural complexity through modular design.
2Reliability
If conventional sealing methods are used, then the structure is simple, but the sealing performance is poor
Solution Approach 1:
The patent employs flexible sealing rings made of elastic materials installed in groove structures within the cylinder blocks and piston rods. These flexible sealing elements deform to conform to the mating surfaces, creating effective seals that prevent gas leakage. The flexible membrane approach provides superior sealing performance compared to rigid sealing methods while adding minimal structural complexity.
3Volume of moving object
If the pump size is reduced, then the compactness is improved, but the high-pressure output capability is compromised
Solution Approach 1:
The second compression cavity and second piston are positioned within the space defined by the first compression cavity and first piston assembly. The nested arrangement allows both compression stages to occupy overlapping spatial volumes, significantly reducing the overall pump size while maintaining the dual-stage compression capability necessary for high-pressure output.
4Stability of the object's composition
If the pistons are aligned on the same axis, then the structure is compact, but the force balance is poor causing vibration
Solution Approach 1:
The patent positions the first and second compression cavities and their corresponding pistons at different angular locations around the crankshaft, rather than aligning them on the same axis. This asymmetric arrangement creates opposing force vectors that balance each other during operation, reducing vibration and improving operational stability while adding minimal structural complexity through straightforward spatial distribution.
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 design achieves high-pressure gas output with improved sealing, energy efficiency, and a compact size, addressing the limitations of existing air pumps.
Implementation Method 1
a first filter and a second filter; The first filter is connected to the first cylinder cover; One end of the second filter is connected to the fourth valve body through the fourth pipeline
Implementation Method 2
A reduction gearbox is disposed in front of the motor. An output shaft is disposed in the reduction gearbox
Implementation Method 3
One end of the output shaft is connected to a crank shaft. One end of the crank shaft is connected to a connecting rod. The connecting rod has one end connected to the crank shaft and the other end connected to a primary piston
Implementation Method 4
A primary cylinder is disposed at one end of the primary piston; A secondary piston rod and the primary piston are connected in a sealed manner. The other end of the secondary piston rod is connected to a secondary piston. A secondary cylinder is disposed at one end of the secondary piston
Implementation Method 5
A one-way valve block is disposed between the primary cylinder cover and the primary cylinder; A primary one-way valve is disposed at one end of the primary piston; A secondary one-way valve is disposed inside the secondary piston
Implementation Method 6
The secondary piston rod and the primary piston are connected in a sealed manner
Data Source
AI summary
A two-stage high-pressure pump includes a reduction gearbox disposed in front of a motor, a-crank shaft connected to an output shaft of the reduction gearbox, a connecting rod having one side connected to the crank shaft and the other side connected to a primary piston, a primary one-way valve disposed at one end of the primary piston, and a gas storage chamber provided at the middle of the primary piston. The other end of the primary piston is connected to a secondary piston rod in a highly sealed manner. The secondary piston rod is provided with a vent in the middle, and the other end of the secondary piston is connected to a high-pressure piston. A secondary one-way valve is disposed in the secondary high-pressure piston. A noise attenuating filter and a one-way valve block are disposed at an air inlet of the primary cylinder cover.