Enclosed Dry-Piston Railway Compressor for Noise and Ice Control
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Solution Overview
Problem
Existing dry piston compressors for the railway sector face challenges in soundproofing and protection from external agents, and they often require additional chassis components that increase weight and size while lacking efficient cooling and ice prevention mechanisms.
Innovation Solution
A self-supporting motor-compressor structure with a closed pressure and soundproofing box, equipped with a fan for cooling and a radiator placement at the air exhaust outlet to prevent ice formation, and 'Y' shaped cylinders for uniform cooling, eliminating the need for a separate chassis and enhancing size and weight efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the compressor is enclosed in a box for soundproofing and protection, then soundproofing and protection from external agents are improved, but weight and size increase
Solution Approach 1:
The patent merges the protective box, soundproofing enclosure, and compressor housing into a single integrated structure. The box serves multiple functions simultaneously: it protects the compressor from external agents, provides soundproofing, and acts as the structural housing, thereby achieving protection without proportionally increasing weight and size
Solution Approach 2:
The enclosed box is designed as a multi-functional component that simultaneously provides mechanical protection from external agents, acoustic insulation for soundproofing, and structural support for the compressor assembly, eliminating the need for separate protective structures
2Strength
If a separate chassis is used to support the compressor, then structural support is improved, but weight and size increase
Solution Approach 1:
The patent eliminates the separate chassis by integrating the support function directly into the enclosed box structure. The box itself is designed to bear and support the compressor assembly, merging the functions of housing and structural support into a single component, thereby reducing overall weight and size while maintaining structural integrity
3Temperature
If the radiator is placed at the air inlet, then cooling is improved, but ice formation occurs at very low temperatures
Solution Approach 1:
The patent inverts the conventional radiator placement by positioning it at the air outlet instead of the air inlet. This reversal allows the radiator to be warmed by the compressed air exiting the cylinders, preventing ice formation from condensate while still providing effective cooling through the reversed thermal exchange mechanism
4Ease of manufacture
If cylinders are arranged in a straight line, then manufacturing is simplified, but uniform cooling of all cylinders is difficult
Solution Approach 1:
The patent employs an asymmetric Y-shaped arrangement of the cylinders instead of a conventional straight-line configuration. This asymmetric layout optimizes the spatial positioning of cylinders relative to the fan and radiator, enabling uniform cooling airflow distribution across all cylinders while maintaining manufacturing feasibility through the symmetrical branching structure of the Y-configuration
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 solution provides improved soundproofing, protection from external agents, reduced weight and size, and effective ice prevention, resulting in an optimal size and weight-to-power ratio for the dry piston compressor.
Implementation Method 1
a fan (2) at the end (air inlet) which has the advantage of sending cold air, unheated by a radiator, onto the cylinders (5) and cylinder heads (6)
Implementation Method 2
The compressor radiator (4) is placed at the air outlet of the box, which results in heated air being blown onto the radiator (4) and thus prevents ice formation at very low temperatures
Data Source
Figure 1
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AI summary
The invention relates to a dry-piston railway compressor comprising an air inlet fan (2) and a self-supporting motor compressor (7). The compressor does not include a chassis and is completely enclosed. The compressor is enclosed in a soundproofing overpressure housing (1). The radiator is placed at the air outlet.