Two-Stage Pump Layout for Continuous Tire Inflation Pressure
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Solution Overview
Problem
Existing tire inflation systems are inefficient, require high energy input, and are not modular, leading to increased wear and limited compatibility with different wheel types.
Innovation Solution
A two-stage pump design that pressurizes fluid during both forward and backward strokes, utilizing a modular and self-contained structure with a passive or active force mechanism, enabling efficient operation and compatibility with various wheel types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-stage pump design is used, then the device complexity is lower, but the pressure differential capability and energy efficiency deteriorate
Solution Approach 1:
The pump is divided into two independent stages: a first stage that pressurizes fluid from atmospheric pressure to an intermediate pressure, and a second stage that further pressurizes the fluid from intermediate pressure to final high pressure. Each stage has its own piston, cylinder, and valve system, allowing them to operate independently and simultaneously during both forward and backward strokes of the drive mechanism.
2Device complexity
If a single-stage pump design is used, then the device structure is simpler, but the energy efficiency and operational continuity deteriorate
Solution Approach 1:
The pump maintains continuous fluid pressurization throughout the entire drive cycle by having both stages operate simultaneously during both forward and backward strokes. While the first stage compresses fluid during the backward stroke, the second stage continues to pressurize fluid during the forward stroke, ensuring no interruption in the useful work of fluid pressurization.
3Ease of manufacture
If a non-modular pump design is used, then the manufacturing process is simpler, but the adaptability to different wheel types deteriorates
Solution Approach 1:
The pump is designed as a modular assembly of discrete components including the first stage assembly, second stage assembly, drive mechanism, and housing, which can be manufactured separately and assembled together. This modular structure allows different configurations to be produced for various wheel types without redesigning the entire system.
Solution Approach 2:
The pump design incorporates universal mounting interfaces and adjustable components that enable the same basic pump structure to be adapted to different wheel types and applications, making it versatile while maintaining manufacturing efficiency through standardized parts.
4Power
If high energy input is used in existing tire inflation systems, then the pressure differential capability is sufficient, but the energy consumption and operational cost increase
Solution Approach 1:
By segmenting the pressurization process into two stages, each handling a portion of the total pressure differential, the system reduces the energy required per stroke compared to a single-stage system attempting to achieve the same final pressure in one step. The intermediate pressure stage allows for more efficient compression mechanics.
Solution Approach 2:
The continuous operation of both stages throughout the entire drive cycle maximizes energy utilization, ensuring that energy input is consistently converted into useful fluid pressurization work without idle periods, thereby improving overall energy efficiency.
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 two-stage pump design achieves higher pressure differentials with lower energy input, reduces wear, and allows for easy replacement and adaptation to different wheels, enhancing efficiency and versatility.
Implementation Method 1
A two-stage pump design that pressurizes fluid during both forward and backward strokes
Implementation Method 2
achieves higher pressure differentials with lower energy input
Data Source
AI summary
In variants, a two-stage pump can include a piston and a cylinder cooperatively defining a first stage in front of the piston fluidly connected to a second stage behind the piston, wherein a forward stroke of the piston pressurizes working fluid in the first stage and forces pressurized working fluid into the second stage, and a backward stroke of the piston further pressurizes working fluid in the second stage and exhausts pressurized working fluid out a pump exhaust.