Oil Pump Partition Wall and Buffer Chamber Design
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Solution Overview
Problem
Conventional oil pumps experience efficiency reduction due to oil leakage from the high-pressure oil chamber into the low-pressure oil chamber, leading to pressure loss.
Innovation Solution
An oil pump design featuring a partition wall between the low-pressure and high-pressure oil chambers, a buffer chamber, and a flow limiting wall to prevent oil leakage and stabilize pressure relief, along with a rotor mechanism for efficient oil pumping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional rotor pump design is used without a partition wall, then the structure is simple, but oil leakage occurs from the high-pressure chamber to the low-pressure chamber causing pressure loss and reduced pumping efficiency
Solution Approach 1:
The pump chamber is segmented into a high-pressure chamber and a low-pressure chamber by a partition wall. This segmentation prevents oil leakage between chambers while maintaining relatively simple individual chamber structures, thereby improving pumping efficiency without excessive complexity
Solution Approach 2:
A buffer chamber is introduced as an intermediary between the high-pressure chamber and low-pressure chamber. The buffer chamber receives pressure relief oil from the high-pressure chamber and controls its flow to the low-pressure chamber, acting as a mediator that stabilizes pressure fluctuations and prevents direct high-pressure oil from causing turbulence in the low-pressure chamber
2Reliability
If no pressure relief mechanism is provided, then the structure is simpler, but high pressure in the high-pressure chamber causes oil to penetrate into the low-pressure chamber leading to pressure loss
Solution Approach 1:
The buffer chamber serves as an intermediary that receives pressure relief oil from the high-pressure chamber through a pressure relief valve. It controls the flow of this oil to the low-pressure chamber, preventing direct high-pressure penetration while maintaining pressure relief functionality
Solution Approach 2:
The buffer chamber provides beforehand cushioning by receiving and stabilizing pressure relief oil before it enters the low-pressure chamber. This cushioning effect prevents sudden pressure fluctuations and turbulence that would otherwise occur when high-pressure oil directly enters the low-pressure chamber
3Power
If high-pressure oil directly enters the low-pressure chamber through pressure relief, then pressure relief is achieved, but oil turbulence occurs reducing pump efficiency
Solution Approach 1:
The buffer chamber provides beforehand cushioning by receiving pressure relief oil from the high-pressure chamber and allowing it to stabilize before flowing into the low-pressure chamber. This cushioning prevents sudden high-pressure injection that would cause turbulence, thereby maintaining pump efficiency while achieving pressure relief
Data Source
Figure 1
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AI summary
An oil pump is provided. The oil pump comprises: a shell (1); a rotor mounting part (11) on the shell (1) and having a rotor supporting structure (111); and a rotor mechanism (2) disposed on the rotor mounting part (11). The shell (1) has an inlet (161) and an outlet (162) and defines a low-pressure oil chamber (12) and a high-pressure oil chamber (13). A partition wall (3) is disposed between the low-pressure oil chamber (12) and the high-pressure oil chamber (13) for partitioning the low-pressure oil chamber (12) and the high-pressure oil chamber (13). An engine cover comprising the oil pump and an engine comprising the engine cover are also provided.