Gas Compressor High-Pressure Supply Hole Design
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Solution Overview
Problem
The existing gas compressors in vehicle air conditioning units face challenges with high manufacturing costs and low workability due to the need for precise deep hole processing to form small diameter high-pressure supply holes, which can lead to excessive oil supply and increased weight, causing chattering issues.
Innovation Solution
A gas compressor design featuring a high-pressure supply hole with a small diameter portion upstream and a larger diameter portion downstream, formed by drilling, which reduces processing costs and improves workability while preventing excessive oil supply and chattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a small diameter high-pressure supply hole is formed by deep hole processing, then excessive oil supply is prevented, but manufacturing cost increases and workability decreases
Solution Approach 1:
The high-pressure supply hole is divided into two segments: an upstream small diameter portion and a downstream large diameter portion. This segmentation allows the hole to serve dual functions - the small upstream portion restricts oil flow to prevent excessive supply, while the large downstream portion facilitates easy drilling and reduces manufacturing difficulty. The segmented structure resolves the contradiction by spatially separating the flow control function from the manufacturing accessibility function.
Solution Approach 2:
Different portions of the high-pressure supply hole have different diameter qualities tailored to their specific functions. The upstream portion has a small diameter optimized for flow restriction, while the downstream portion has a large diameter optimized for drilling accessibility. This local differentiation of geometric quality allows each section to optimize for its primary purpose, resolving the contradiction between flow control and manufacturability.
2Quantity of substance
If a small diameter high-pressure supply hole is formed, then oil supply is restricted, but processing precision requirements increase
Solution Approach 1:
By segmenting the hole into small upstream and large downstream portions, the precision-critical small diameter section is isolated to only the upstream portion where flow restriction is needed. The downstream portion can be drilled with standard precision, reducing overall manufacturing precision requirements while still achieving the oil supply restriction goal through the upstream segment.
Solution Approach 2:
The precision-critical flow control function is extracted and concentrated in the upstream small diameter portion, while the downstream large diameter portion handles the bulk of the manufacturing process with standard precision. This extraction separates the high-precision requirement from the bulk manufacturing, reducing overall precision demands.
3Reliability
If oil supply amount is increased to prevent chattering, then compressor performance improves, but compressor weight increases
Solution Approach 1:
The invention changes the geometric parameters of the oil supply hole - specifically creating a small upstream diameter and a large downstream diameter. This parameter configuration allows the system to maintain adequate oil supply for chattering prevention while restricting the total oil quantity stored in the compressor, thereby preventing weight increase. The parameter optimization resolves the contradiction between reliability and weight.
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 design effectively reduces processing costs and prevents chattering by allowing efficient oil supply with minimal pressure loss, maintaining optimal oil levels and compressor performance.
Implementation Method 1
a high-pressure supply hole through which the oil at a pressure higher than the certain pressure is supplied to the vane grooves
Implementation Method 2
an oil separator to separate, from the discharged high-pressure medium, oil to be used as the back pressure
Implementation Method 3
a gas compressor... to generate high-pressure refrigerant gas by compressing gaseous refrigerant
Data Source
AI summary
A gas compressor comprises a rotor having vane grooves, a cylinder shaped to surround an outer circumference of the rotor, vanes plate-shaped, slidably inserted into the vane grooves, and abuttable at one ends on the inner circumference of the cylinder, upon receiving a back pressure from the vane grooves, two side blocks to enclose both ends of the rotor and the cylinder, respectively, compression chambers supplied with a medium to compress the medium to a high-pressure medium for discharge, an oil separator to separate, from the discharged high-pressure medium, oil to be used as the back pressure, an oil path through which the oil at a certain pressure is supplied to the vane grooves, and a high-pressure supply hole formed in at least one of the side blocks, including a small diameter portion and a large diameter portion integrally formed.