Reciprocating Compressor Frame Cylinder Separation
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Solution Overview
Problem
Reciprocating type compressors face challenges in maintaining the designed gap between the piston and cylinder due to deformation during assembly, leading to wear issues and reduced compression efficiency, and the integrated casting structure increases manufacturing costs and size.
Innovation Solution
The compressor design separates the cylinder and rotational supporting portion, using a frame to align and support the rotational shaft and cylinder, preventing deformation and allowing for precise assembly without direct fixation, which reduces weight and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gap between the piston and the bore of the cylinder is made wider to prevent oil film breaking, then wear reliability is improved, but fluid-tightness is compromised resulting in reduced compression efficiency
Solution Approach 1:
The invention performs preliminary action by precisely controlling the gap dimensions during the manufacturing stage and maintaining this precision through the assembly process. The frame structure is designed with pre-calculated dimensions that ensure the piston-bore gap remains within the optimal range of 0.02-0.05mm, preventing both oil film breaking and fluid leakage before the compressor operates.
2Stability of the object's composition
If the cylinder and rotational supporting portion are manufactured as a single integrated component, then structural stability is improved, but manufacturing cost and compressor weight increase
Solution Approach 1:
The invention applies segmentation by dividing the integrated cylinder-rotational support structure into separate components: the cylinder assembly and the frame with rotational supporting portions. This allows each component to be manufactured independently using optimized processes, reducing overall manufacturing cost and weight while maintaining structural stability through precise mating features and assembly constraints.
3Stability of the object's composition
If the cylinder and rotational supporting portion are manufactured as a single integrated component, then structural stability is improved, but the compressor size becomes larger
Solution Approach 1:
By segmenting the structure into separate cylinder and frame components, the invention enables more efficient spatial arrangement. The frame can be designed with optimized thickness and the cylinder can be positioned precisely, reducing the overall envelope dimensions compared to a bulky integrated casting while maintaining structural integrity through careful design of the separation interfaces.
4Ease of manufacture
If all support points for the rotational shaft are located below the second axis, then manufacturing is simplified, but support reliability is insufficient requiring increased vertical length
Solution Approach 1:
The invention applies asymmetry by distributing the rotational shaft support points asymmetrically relative to the second axis, with some support points above and some below. This asymmetric distribution provides superior support reliability and rotational stability without requiring increased vertical length, as the support points are optimally positioned to balance the forces acting on the rotating assembly.
Data Source
AI summary
A reciprocating type compressor having a structure in which a rotational support of a rotational shaft and a cylinder are manufactured as separate components; a frame provided with the rotational support fixes the cylinder; and a cylinder head is fixed to the frame to cover the cylinder.