Oil-Free Compressor Cooling Fan Duct Arrangement
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Solution Overview
Problem
Conventional oil-free screw compressors face issues with noise leakage and increased pressure loss due to the exposure of cooling devices on the back surface, leading to performance deterioration and higher costs, as well as increased noise from pipe vibrations and complex pipe configurations.
Innovation Solution
The design includes air-cooled heat exchangers arranged in a circumferential direction around a cooling fan within a duct, with exhaust ducts connecting them to the package top, reducing noise leakage and pipe length, and utilizing a turbo fan for efficient cooling wind distribution, which shortens pipe lengths and reduces noise and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling devices are arranged on the back surface exposed to outside air, then the cooling capability is improved and cooler size is reduced, but noise leaks easily from the front surface of the cooler part
Solution Approach 1:
A partition wall is introduced as an intermediary structure between the cooler and the external environment. The partition wall extends from the front surface of the cooler to the front surface of the package, creating a physical barrier that blocks noise propagation while preserving the cooler's exposure to ambient air for effective heat dissipation.
Solution Approach 2:
The package is divided into multiple compartments using partition walls. The cooler is placed in a specific compartment that is acoustically isolated from the external environment through the partition structure, while still maintaining access to cooling air flows.
2Ease of manufacture
If air-cooled heat exchangers are arranged isolated from the compressor main body, then the structural layout is simplified, but pipe length increases and pressure loss increases
Solution Approach 1:
The heat exchangers are integrated with the compressor main body structure rather than being completely separate components. The partition walls and package structure are used to create compact arrangements where cooling air flows can directly connect heat exchangers to the compressor, minimizing pipe lengths while maintaining structural simplicity.
3Adaptability or versatility
If pipe length connecting compressor and heat exchangers is increased, then the structural layout is more flexible, but noise from pipe vibration increases and costs increase
Solution Approach 1:
The package is segmented into compartments using partition walls that also serve as structural supports. This segmentation allows for flexible component placement while keeping connection pipes short by positioning heat exchangers in adjacent compartments to the compressor, thereby reducing pipe length and vibration noise.
Solution Approach 2:
Partition walls act as intermediary structures that facilitate compact component arrangement. These walls provide mounting surfaces and structural support that enable flexible layouts without requiring long connecting pipes, thus maintaining adaptability while minimizing vibration noise.
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
This configuration results in a compact, low-noise oil-free screw compressor with improved cooling efficiency and reduced installation area, while minimizing noise and cost by internalizing cooling components and optimizing pipe lengths.
Implementation Method 1
a cooling fan for wind passage through the low-pressure stage air-cooled heat exchanger, the high-pressure stage air-cooled heat exchanger, and the lubricating oil air-cooled heat exchanger
Implementation Method 2
a low-pressure stage air-cooled heat exchanger cooling compressed air discharged from the low-pressure stage compressor; a high-pressure stage air-cooled heat exchanger cooling the compressed air discharged from the high-pressure stage compressor
Data Source
AI summary
An oil free compressor includes a cooling fan, a low-pressure stage air-cooled heat exchanger, a high-pressure stage air-cooled heat exchanger, and a lubricating oil air-cooled heat exchanger. The cooling fan is provided independently from each of the low-pressure stage air-cooled heat exchanger, the high-pressure stage air-cooled heat exchanger, and the lubricating oil air-cooled heat exchanger.