Flow Control Valve Geometry for Stable Scroll Compressor Lubrication
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Solution Overview
Problem
Existing scroll compressors face challenges in maintaining stable lubrication, particularly at varying rotation speeds, due to inconsistent oil flow, which can lead to inefficiencies and potential damage from inadequate lubrication.
Innovation Solution
A flow control valve with a valve body, passage, and valve element design that adjusts flow area based on distance from the inlet, combined with an elastic member for consistent oil flow, integrated into an oil pump assembly and scroll compressor, ensuring stable lubrication across different rotation speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional oil pump assembly is used in scroll compressors, then the structure is simple, but the oil flow becomes unstable at varying rotation speeds, leading to inadequate lubrication
Solution Approach 1:
The valve element is designed to move dynamically within the passage, adjusting the flow area in real-time based on operating conditions. The elastic member enables the valve element to respond to pressure changes, creating a dynamic flow control system that adapts to varying rotation speeds while maintaining stable oil flow and reliable lubrication.
2Reliability
If the passage cross-sectional area is constant, then the manufacturing is simple, but the oil flow rate varies significantly with rotation speed, compromising lubrication quality
Solution Approach 1:
The passage is designed with varying cross-sectional area along its length, creating different flow characteristics in different sections. The valve element selectively adjusts local flow areas by moving to different positions, enabling precise control of oil flow rate to maintain consistent lubrication quality across varying operating conditions.
3Reliability
If a fixed flow area is used in the oil pump, then the device complexity is low, but the oil flow cannot adapt to varying rotation speeds, leading to lubrication failures
Solution Approach 1:
The valve element automatically adjusts the flow area in response to pressure changes caused by varying rotation speeds, without requiring external control systems. The elastic member provides the restoring force, enabling the system to self-regulate oil flow and ensure adequate lubrication across different operating conditions through autonomous operation.
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 provides stable lubrication to the scroll compressor, maintaining consistent oil flow regardless of rotation speed, thereby enhancing the compressor's performance and extending its operational lifespan.
Implementation Method 1
an elastic member provided in the valve body to apply an elastic force on the valve element so as to move the valve element in a direction toward the inlet
Data Source
AI summary
Embodiments of the present disclosure provide a flow control valve, an oil pump assembly having the flow control valve, and a scroll compressor. The flow control valve includes: a valve body having an inlet configured for a fluid to flow into the valve body and an outlet configured for the fluid to flow out of the valve body; a passage provided between the inlet and the outlet and extending in a predetermined direction, an area of a cross section of the passage perpendicular to the predetermined direction being negatively correlated with a distance from the cross section to the inlet; a valve element slidably provided in the passage, a flow area between the valve element and an inner wall of the passage is negatively correlated with the distance from the valve element to the inlet; and an elastic member provided in the valve body to apply an elastic force on the valve element so as to move the valve element in a direction toward the inlet. Thereby, for example, lubrication of the scroll compressor is improved.