Reciprocating Compressor Damper Reduces Friction Noise
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Solution Overview
Problem
Reciprocating compressors experience significant friction noise and mechanical damage due to vibration, with the discharge hose being prone to collision and damage from the compressor shell, especially during operation and transportation.
Innovation Solution
A reciprocating compressor design featuring a damper with a plastic damper base and rubber damping portions integrated through insert-injection molding, which is coupled to the cylinder block to prevent contact with the shell, reducing friction noise and protecting the discharge hose from heat damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid damper base is used to support the cylinder block, then structural strength is improved, but friction noise and mechanical damage occur due to vibration contact with the shell
Solution Approach 1:
The damper base is constructed as a composite structure combining a rigid plastic base material with rubber damping portions. The rigid plastic provides structural strength to support the cylinder block, while the rubber damping portions reduce friction noise by preventing contact between the damper base and compressor shell during vibration.
Solution Approach 2:
Different portions of the damper base have different material properties: the main body uses rigid plastic for structural support, while specific contact portions use rubber material for vibration damping and noise reduction. This local differentiation of material quality resolves the contradiction between strength and noise.
2Volume of moving object
If the discharge hose is positioned close to the shell for compact design, then space utilization is improved, but the discharge hose collides with or is damaged by the shell during vibration
Solution Approach 1:
The damper base acts as an intermediary component between the cylinder block and the compressor shell. It positions the discharge hose in close proximity to the shell for compact design while simultaneously preventing direct contact and collision between the hose and shell during vibration, thus protecting the hose integrity.
Solution Approach 2:
The rubber damping portions are positioned in advance to cushion and prevent contact between vibrating components and the shell. This beforehand cushioning protects the discharge hose from collision and damage during vibration before any contact can occur.
3Strength
If welding is used to assemble the housing shell for structural strength, then joint strength is improved, but the discharge hose is melted by welding heat
Solution Approach 1:
The damper base serves as a protective intermediary between the welding process and the discharge hose. It positions the hose away from the welding zone while maintaining compact overall design, preventing the hose from being exposed to melting temperatures during shell assembly welding.
Solution Approach 2:
The discharge hose is positioned and secured by the damper base before the welding process occurs. This preliminary positioning prevents the hose from being in the path of welding heat, avoiding thermal damage while still allowing welding to proceed for strong joint assembly.
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 effectively reduces friction noise by over 10 dB and prevents mechanical damage to the compressor components, ensuring stable operation and reduced wear during vibrations from operation or transportation.
Implementation Method 1
a rubber damping portion provided on the damper base material to prevent contact between the damper base material and the shell
Implementation Method 2
the rubber damping portion is insert-injection-molded onto the damper base
Data Source
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AI summary
A reciprocating compressor and a method for manufacturing a reciprocating compressor are provided. The reciprocating compressor may include a damper provided at a cylinder block. The damper may include a damper base coupled to the cylinder block and formed of plastic, and a rubber damping portion provided on the damper base to prevent contact between the damper base and the shell, so that friction noise between a base and the shell of the compressor may be reduced.