Variable Oil Injection Orifice for Compressor Lubrication
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Solution Overview
Problem
Existing compressor systems, particularly oil-flooded compressors, face challenges in suitably injecting oil across various operating regimes due to fixed orifice limitations, leading to suboptimal lubrication conditions and increased noise during transitions between on-load and off-load modes.
Innovation Solution
A compressor system featuring a continuously variable oil injection orifice that regulates oil flow from an oil reservoir to the compressor, utilizing a valve member and biasing member to adjust the flow area in response to pressure, ensuring optimal oil supply across different operating pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed orifice is used for oil injection, then the device complexity is reduced, but the lubrication performance deteriorates at intermediate pressures
Solution Approach 1:
The patent applies the dynamics principle by implementing a variable orifice that automatically adjusts its flow area in response to changing oil pressures. The orifice transitions from a fixed structure to a dynamic one that adapts to different operating conditions, ensuring optimal lubrication performance across the full pressure range without requiring multiple discrete orifices.
Solution Approach 2:
The patent employs parameter changes by modifying the flow area parameter of the orifice based on oil pressure conditions. The variable orifice mechanism changes the effective flow area parameter dynamically, allowing the system to maintain optimal lubrication parameters across varying operating pressures rather than being constrained to a single fixed parameter value.
2Reliability
If multiple orifices are used for different pressure ranges, then the lubrication performance is improved across all regimes, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a single variable orifice structure that performs multiple functions across different pressure ranges. This universal orifice replaces multiple specialized orifices, maintaining optimal lubrication performance for low-pressure, intermediate-pressure, and high-pressure operations through one integrated mechanism rather than requiring separate components for each regime.
Solution Approach 2:
The patent merges the functionality of multiple discrete orifices into a single variable orifice structure. By combining what would have been separate low-pressure and high-pressure orifices into one adaptive component, the system achieves comprehensive lubrication coverage while reducing the total number of parts and simplifying the overall injection system architecture.
3Reliability
If a variable orifice is used to optimize oil flow at intermediate pressures, then the lubrication performance is improved, but the device complexity increases
Solution Approach 1:
The patent applies self-service by designing a variable orifice mechanism that automatically adjusts its own flow area in response to oil pressure changes without requiring external control systems. The orifice serves itself by using the oil pressure differential as the actuating force, eliminating the need for additional actuators, sensors, or control electronics that would otherwise increase device complexity.
4Reliability
If oil injection is optimized for on-load and off-load modes, then the lubrication performance is improved at extreme pressures, but the performance at intermediate pressures deteriorates
Solution Approach 1:
The patent applies dynamics by creating an orifice system that continuously adapts its flow characteristics across the entire pressure spectrum. Rather than being optimized for discrete operating modes (on-load or off-load), the variable orifice dynamically adjusts to provide optimal performance across the continuous range of intermediate pressures that occur during transitional operating conditions.
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 continuously variable oil injection orifice provides consistent and optimal oil lubrication across varying operating pressures, reducing noise and improving compressor performance by ensuring the right flow rate at intermediate pressures, eliminating the need for multiple orifices and enhancing operational efficiency.
Implementation Method 1
a first valve member (30) structured to displace in response to oil pressure
Implementation Method 2
a biasing member (34) structured to urge the first valve member (30) away from the second valve member (32)
Data Source
Figure 1
Figure 2~3
AI summary
A compressor system with a continuously variable oil injection orifice is structured to regulate a flow of oil from an oil reservoir into a compressor. The orifice includes a first valve member movable in response to oil pressure toward a second valve member to define a continuously variable flow area. A biasing member urges the first valve member away from the second valve member.