Vane Pump Flow Guide Device for Cold-Start Performance
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Solution Overview
Problem
Vane-type pumps face inefficiencies and poor cold-start performance due to the use of cold-start plates, which introduce additional pressure differentials and increased power consumption.
Innovation Solution
A flow guide device is introduced between the pressure plate and the housing, directing the working medium from pressure passage holes through under-vane passage holes to the pressure outlet, optimizing the fluid path and enhancing cold-start performance without the disadvantages of a cold-start plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cold-start plate is used to improve cold-start performance, then the pump can start in cold conditions, but additional pressure differential and increased power consumption occur
Solution Approach 1:
The invention removes the cold-start plate component entirely and replaces it with a flow guide device that integrates the cold-start function into the existing fluid path structure. The flow guide device directs fluid flow to provide necessary lubrication and cooling during cold start without requiring an additional pressure differential, thereby eliminating the extra power consumption associated with cold-start plates while maintaining reliable cold-start performance
2Reliability
If a cold-start plate is used to separate pressure areas, then cold-start performance is improved, but device complexity increases
Solution Approach 1:
The invention merges the cold-start function with the flow guide structure by integrating the flow guide device into the existing fluid path between the pressure plate and housing. This consolidation eliminates the need for separate cold-start plate components and their associated mounting structures, reducing device complexity while maintaining the ability to direct fluid flow for proper cold-start 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 flow guide device improves cold-start performance by directing the fluid medium efficiently from pressure passage holes to under-vane areas and subsequently to the pressure outlet, reducing power consumption and enhancing overall pump efficiency.
Implementation Method 1
The flow guide device causes a working medium, in particular a hydraulic medium, such as oil, to be directed along a desired path from the pressure passage hole first to the under-vane passage hole, and only subsequently to the pressure outlet of the pump
Data Source
AI summary
A pump, particularly a vane-type pump, including a rotor guiding at least one vane and resting against at least one pressure plate, which has at least one pressure through-hole and at least one under-vane through-hole, the holes being connected to a pressure outlet provided in a housing of the pump or in a transmission housing. In between the pressure plate and the housing a flow guide device is arranged, which delimits a fluid path from the pressure through-hole past the under-vane through-hole to the pressure outlet.