Motor Assembly Stator Fastening for Reciprocating Compressor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing reciprocating compressors face challenges in stabilizing the motor assembly, leading to deformation and potential breakage due to press-fitted structures, which also complicate assembly and reduce efficiency.
Innovation Solution
A motor assembly design where the stator is coupled to the cylinder block using a fastening member, with a staged cross-sectional structure and a threaded bolt system, ensuring stable support and minimizing gaps and vibrations during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the stator is fixed to the outer circumference of the bearing by press-fitting, then the motor assembly can be installed, but it causes indentation deformation of the cylinder block boss portion to penetrate into the journal bearing area, resulting in deformation and damage
Solution Approach 1:
The patent introduces a separate fixing member as an intermediary component between the stator and the cylinder block. This fixing member has a pressing portion that contacts the stator and a fastening portion that secures it to the cylinder block, thereby eliminating the need for direct press-fitting that causes deformation while maintaining stable motor assembly installation
2Device complexity
If the pressing force with respect to the press-fitted structure is small, then the structure is simpler, but the stator may come loose due to an up and down impact, such as falling
Solution Approach 1:
The fixing member is divided into distinct functional portions: a pressing portion for contacting and positioning the stator, and a fastening portion for securing the assembly to the cylinder block. This segmentation allows the structure to remain simple while providing reliable anti-loosening capability through the integrated fastening features
3Use of energy by moving object
If a structure of fixing the stator fixing member to a compression element member in a state in which a gap between an inner circumference of the rotor and an outer circumference of the stator is set to become equal is used, then motor efficiency is improved, but it is difficult to assemble a reciprocating compressor due to its relatively complicated structure
Solution Approach 1:
The fixing member incorporates an integrated design where the pressing portion and fastening portion work together to automatically maintain the optimal gap between the rotor and stator during assembly. The structure enables the compressor to be assembled in a straightforward sequence without requiring complex alignment procedures or multiple adjustment steps
Data Source
AI summary
A motor assembly for compressing a fluid by causing a rotational shaft to reciprocate by providing a drive force to the rotational shaft, and a reciprocating compressor including a motor assembly are provided. The motor assembly may include a cylinder block in which a bore is formed and which is penetrated by the rotational shaft, a stator coupled to the cylinder block, a rotor installed at an outer circumferential surface of the stator so as to be rotated by the stator and which is coupled to the rotational shaft so as to rotate together with the rotational shaft, and at least one fastening member that fastens the stator and the cylinder block to each other such that the stator is supported by the cylinder block.