Compressor Thrust Plate Oil Slit and Chamber Design
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Solution Overview
Problem
Compressors in air conditioning devices face issues with thrust plate damage due to lack of oil supply and complex structures, leading to increased costs and difficulties in extracting cylinder blocks from molds.
Innovation Solution
A compressor design featuring a thrust plate with a PTFE coating and oil grooves to prevent damage, along with a slit system to guide oil between the rotary shaft and thrust plate, and a chamber configuration that allows easy extraction of the cylinder block from molds by varying inner diameters and forming a conical shape for the third chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a coating layer is provided on the thrust plate to reduce friction, then the friction between the rotary shaft and thrust plate is reduced, but the coating layer detaches due to lack of oil supply, causing damage to the thrust plate
Solution Approach 1:
The patent uses oil (hydraulic fluid) supply through the slit to the chamber to lubricate the contact surface between the rotary shaft and thrust plate. The oil supply system ensures continuous lubrication to the coating layer, preventing detachment and damage while maintaining low friction.
2Reliability
If thrust bearings are used to support the rotary shaft, then the rotary shaft is properly supported, but the structure becomes complicated and costs increase
Solution Approach 1:
The patent extracts the essential function of thrust bearings (supporting the rotary shaft axially) and implements it through a simpler structure: a thrust plate with a coating layer in a chamber. The complex multi-component thrust bearing assembly is replaced by a single thrust plate element, reducing structural complexity while maintaining support functionality.
Solution Approach 2:
The patent changes the support mechanism from mechanical thrust bearings to a lubricated sliding contact system. By introducing oil lubrication and using a coating layer on the thrust plate, the friction parameters are optimized to enable simple sliding contact instead of complex bearing structures.
3Reliability
If the chamber is formed in a cylindrical shape to accommodate the thrust plate, then the thrust plate is properly positioned, but it becomes difficult to extract the cylinder block from the mold
Solution Approach 1:
The patent segments the chamber into multiple sections with different inner diameters (first chamber, second chamber, third chamber). This segmentation allows the cylinder block to be extracted from the mold by pulling through the progressively smaller sections, solving the extraction difficulty while maintaining proper thrust plate positioning in the first chamber.
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 prevents thrust plate damage by ensuring consistent oil supply and reduces friction, simplifies the rotary shaft support structure, and facilitates easy extraction of the cylinder block from molds by optimizing chamber dimensions and shapes.
Implementation Method 1
a slit configured to guide oil to the chamber, in which a part of the slit is formed to face a contact portion between the rotary shaft and the thrust plate
Implementation Method 2
A compressor including: a casing; a rotary shaft rotatably mounted in the casing; a compression mechanism configured to compress a refrigerant by operating in conjunction with the rotary shaft; a thrust plate configured to support an end surface of the rotary shaft
Data Source
AI summary
A compressor including: a casing; a rotary shaft rotatably mounted in the casing; a compression mechanism configured to compress a refrigerant by operating in conjunction with the rotary shaft; a thrust plate configured to support an end surface of the rotary shaft; a chamber configured to accommodate the thrust plate; and a slit configured to guide oil to the chamber, in which a part of the slit is formed to face a contact portion between the rotary shaft and the thrust plate, such that it is possible to supply the oil between the rotary shaft and the thrust plate, thereby preventing damage to the thrust plate for supporting the rotary shaft. In addition, an inner diameter of the chamber gradually increases, and the chamber extends to an end surface of a cylinder block, such that the cylinder block may be easily extracted from a mold.