Vane Pump Insert Housing Integration
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Solution Overview
Problem
Pump inserts in vane-type pumps used in transmission housings are costly, space-consuming, and complex due to the need for additional housing parts and expensive fastening means like screws.
Innovation Solution
A vane-type pump insert without its own housing, secured axially in a transmission housing by a retaining ring, utilizing a pressure field between a first pressure plate, a contour ring, and a second pressure plate to minimize leakage and eliminate the need for a second housing part or expensive fastening means, with a combination seal acting as both a sealing and supporting element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional housing parts and expensive fastening means (screws, covers) are used to secure the pump insert, then the pump insert is reliably fixed in position, but the device complexity and cost increase
Solution Approach 1:
The pump insert merges the functions of housing and pump body into a single integrated component. The first pressure plate serves both as a structural support element and as part of the sealing system, eliminating the need for separate housing parts and fastening means while maintaining reliable fixation through the retaining ring and pressure field mechanism
Solution Approach 2:
The first pressure plate performs multiple functions simultaneously: it provides structural support, creates the pressure field for sealing, and works with the retaining ring to secure the pump insert axially. This multi-functionality reduces the number of components needed while maintaining reliability
2Reliability
If additional housing parts and expensive fastening means are used, then the pump insert is securely fastened, but the manufacturing cost increases
Solution Approach 1:
By integrating the housing and pump body functions into a single component, the manufacturing process is simplified and costs are reduced. The retained ring and pressure field mechanism provide secure fastening without requiring expensive screws or multiple housing parts, making the pump insert more cost-effective to manufacture
3Device complexity
If a retaining ring is used to secure the pump insert axially, then fastening complexity is reduced, but axial forces may cause deformation and misalignment
Solution Approach 1:
The second pressure plate features a locally optimized geometry with an inclined retaining ring groove and self-restraining contact surface. This local structural enhancement provides axial support while preventing deformation and misalignment through the self-restraining mechanism, maintaining stability without increasing overall device complexity
Solution Approach 2:
The pump insert design incorporates preliminary alignment features during manufacturing, including the self-restraining contact surface and inclined retaining ring groove, which pre-establish proper alignment before operation. This preliminary action prevents misalignment and deformation under axial loads
4Reliability
If the first pressure plate is pressed by a pressure field, then sealing performance improves, but the structural load increases
Solution Approach 1:
The pressure field is concentrated locally on the first pressure plate, creating high contact pressures that ensure effective sealing. This localized pressure distribution maintains strong sealing action while the overall structural load is managed through the distributed support provided by the retaining ring and second pressure plate geometry
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
This design reduces the risk of deformation and misalignment, minimizes leakage, and simplifies the structural design by eliminating the need for additional housing components, while ensuring secure sealing and efficient operation.
Implementation Method 1
the first pressure plate is axially pressed by a pressure field against the contour ring, and against the second pressure plate and the retaining ring
Implementation Method 2
the axial seal is designed as a combination seal that is composed of a sealing and a supporting element
Data Source
AI summary
A pump insert of a vane-type pump having no dedicated housing, the insert being inserted in a gear housing.