Oil Pump Buffer Chamber Reduces Eddy
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Solution Overview
Problem
Conventional oil pumps experience efficiency reduction due to pressure relief oil impacting against the main flow in the low-pressure oil passage, causing unnecessary eddy.
Innovation Solution
An oil pump design featuring a buffer chamber and barrier wall between the high-pressure and low-pressure oil chambers, which changes the flow direction and speed of pressure relief oil, preventing eddy formation and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure relief oil is released directly into the low-pressure oil passage, then the pressure relief function is achieved, but the pressure relief oil impacts against the main flow causing eddy and reducing pump efficiency
Solution Approach 1:
The low-pressure oil passage is segmented into two separate passages: a first low-pressure oil passage for the main oil flow and a second low-pressure oil passage for the pressure relief oil. This segmentation allows the pressure relief oil to be discharged separately without mixing with the main flow, eliminating the harmful impact and eddy formation while maintaining the pressure relief function.
2Reliability
If pressure relief oil flows directly into the low-pressure oil chamber, then the pressure relief is achieved, but the flow direction changes cause eddy and energy loss
Solution Approach 1:
A guide wall is introduced as an intermediary structure in the second low-pressure oil passage. The guide wall smoothly guides the pressure relief oil from the high-pressure oil chamber into the second passage, controlling the flow direction and preventing sudden changes that would cause eddy and energy loss. This intermediary structure enables pressure relief while minimizing energy dissipation.
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 stabilizes the flow of pressure relief oil, reducing impact force and improving the overall efficiency of the oil pump by preventing unnecessary eddy and ensuring smooth flow.
Implementation Method 1
the flowing direction of the pressure relief oil is changed and the flowing speed thereof is reduced, thus stabilizing the flow of the pressure relief oil
Implementation Method 2
the pressure relief oil may flow along the barrier wall smoothly, thus avoiding the unnecessary eddy
Data Source
AI summary
An oil pump is provided. The oil pump comprises a shell, a rotor mounting part on the shell, and a rotor mechanism disposed on the rotor mounting part. The shell has an inlet and an outlet and defines a low-pressure oil chamber and a high-pressure oil chamber therein. A buffer chamber is defined between the low-pressure oil chamber and the high-pressure oil chamber, and a barrier wall is disposed between the buffer chamber and the low-pressure oil chamber. An engine cover comprising the oil pump and an engine comprising the engine cover are also provided.