Multi-Stage Piston Compressor External Cooling Air Guide
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Solution Overview
Problem
Existing multi-stage piston compressors face challenges in efficient cooling, particularly in soundproof enclosures and hot environments, due to thermal insulation properties of soundproofing materials and inadequate cooling air distribution, leading to increased component wear and noise emissions.
Innovation Solution
An external cooling air duct is attached to the compressor unit, redirecting axially directed airflow from an axial fan in a radial direction around the crankcase to efficiently cool the cylinders, especially the high-pressure stage, using a curved air-guiding housing that connects to the cooler unit and features fins to enhance airflow dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If soundproofing materials are used to reduce noise emissions, then noise levels are reduced, but thermal insulation properties prevent adequate cooling of the compressor unit
Solution Approach 1:
The air guide housing is divided into multiple arc-shaped segments that can be attached to different portions of the compressor unit, allowing the cooling system to be implemented in a modular fashion that distributes airflow efficiently throughout the soundproof enclosure without requiring complete redesign of the enclosures
Solution Approach 2:
The air guide housing acts as an intermediary component between the axial fan and the cylinders, redirecting the axially directed airflow into a radial flow pattern that efficiently distributes cooling air around the crankcase and onto the cylinders, thereby maintaining cooling effectiveness within the soundproof enclosure
2Temperature
If cooling air is blown directly onto the cylinders by an axial fan, then cooling is provided, but a large portion of cooling air is lost due to turbulence caused by rebound off the cylinders
Solution Approach 1:
The air guide housing features a curved, arc-shaped design that guides cooling air radially around the crankcase in a smooth, laminar flow pattern. This curvature prevents direct impingement and rebound of cooling air off the cylinders, reducing turbulence and minimizing cooling air loss while maintaining effective cooling
3Temperature
If a radial fan is used to move cooling air transversely across the compressor, then cooling is achieved, but a complex component layout is required for cooling air routing
Solution Approach 1:
The air guide housing serves multiple functions simultaneously: it acts as an airflow guide, a structural support element, and a noise-dampening component within the soundproof enclosure. This multi-functionality eliminates the need for separate complex routing components, simplifying the overall system while maintaining effective cooling
Solution Approach 2:
The air guide housing merges the functions of airflow direction, structural support, and noise reduction into a single integrated component that attaches directly to the compressor unit, thereby simplifying the component layout and eliminating the need for separate cooling air routing mechanisms
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 solution provides effective cooling with reduced noise emissions and extended compressor lifespan by ensuring efficient heat dissipation, even in encapsulated or high-temperature installations, while minimizing component complexity and maintaining operational efficiency.
Implementation Method 1
a cooling unit, driven by and attached to the crankshaft, is arranged on the opposite end face of the compressor unit, the integrated axial fan of which blows the generated cooling air substantially along the outside of the compressor unit
Implementation Method 2
The curvature of the arc-shaped air guide housing deflects the airflow into a laminar flow for the efficient cooling of an air-cooled cylinder
Implementation Method 3
efficient cooling of an air-cooled cylinder of the compressor unit equipped with cooling fins
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a multi-stage piston compressor which comprises a compressor unit (1) having a plurality of air-cooled cylinders (10a-10c), the crankshaft (8) of said compressor unit being housed in a crankcase (6) and driving a motor unit (3) that is flange-mounted on an end face (2) on said compressor. On the opposing end face (4) of the compressor unit (1), a cooler unit (5) is arranged, mounted on said compressor unit and driven by the crankshaft (8), the integrated axial fan wheel (9) of said cooler unit blowing the generated cooling air substantially outwards along the compressor unit (1) and, in order to conduct cooling air externally in the region of said compressor unit (1), at least one air guide housing (7) which extends at least partially radially around the crankcase (6) in a curved manner being mounted on said cooler unit (5) on the air inlet side and being mounted on the compressor unit (1) crankcase (6) on the air outlet side such that the axial air flow which is generated by said axial fan wheel (9) is at least partially taken in by the air guide housing (7) and at least partially guided around the crankcase (6) in the radial direction so as to reach at least one cylinder (10a) arranged on the air outlet side of said air guide housing (7).