Multiflow Pump One-Piece Piston for Lubricant Metering
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Solution Overview
Problem
Multiflow pumps used for lubricant supply have lower metering accuracy and reliability compared to those used for fuel injection, making them less effective despite being cost-effective.
Innovation Solution
A multiflow pump design incorporating a one-piece displacement piston unit with a bearing journal and elastomer seals, a cost-effective pump head made from plastic with integrated outlet valve devices, and an electromagnetic translatory drive for precise metering and reduced production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional multiflow pumps are used for lubricant supply, then production costs are reduced, but metering accuracy and reliability deteriorate
Solution Approach 1:
The displacement piston unit is configured as a one-piece component integrating the bearing journal, spring receptacle, carrier plate, and multiple pump pistons. This merging of components simplifies the overall structure, reduces assembly complexity, and enables cost-effective manufacturing while achieving high metering accuracy through integrated design and precise positioning features.
2Ease of manufacture
If conventional multiflow pumps are used for lubricant supply, then production costs are reduced, but reliability deteriorates
Solution Approach 1:
The one-piece displacement piston unit eliminates multiple assembly interfaces and potential failure points associated with separate components. The integrated design ensures consistent positioning and operation of all pump pistons, thereby enhancing reliability while maintaining cost-effectiveness through reduced assembly steps and fewer individual parts.
3Manufacturing precision
If the displacement piston unit is configured in one piece, then metering accuracy is improved, but device complexity increases
Solution Approach 1:
The one-piece configuration integrates multiple functional elements (bearing journal, spring receptacle, carrier plate, pump pistons) into a single monolithic component. This merging approach actually reduces overall device complexity by eliminating the need for multiple separate parts, fasteners, and assembly steps, while simultaneously achieving high metering accuracy through integrated precision features.
4Ease of manufacture
If the pump head is produced from plastic by injection-moulding, then production costs are reduced, but strength and durability may deteriorate
Solution Approach 1:
The pump head is produced from plastic material using injection-moulding with optimized process parameters and material selection. This manufacturing approach achieves cost-effective production while maintaining sufficient strength and durability for lubricant supply applications through appropriate material properties and design considerations for the specific service conditions.
5Ease of manufacture
If the sleeves are connected to the pump head by injection, then assembly costs are reduced, but manufacturing complexity increases
Solution Approach 1:
The sleeves of the outlet valve devices are connected to the pump head by injection-moulding in an integrated manufacturing process. This merging of components during production eliminates subsequent assembly steps, reduces assembly costs, and simplifies the overall manufacturing process despite the specialized injection-moulding technique required.
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 design enhances metering accuracy and reliability while maintaining low costs, allowing for a compact and efficient lubricant supply system with reduced assembly stresses and production costs.
Implementation Method 1
The pump pistons are provided with elastomer seals which bear against axial surfaces of the pump pistons during the working stroke of the displacement piston unit, wherein sealing of the pump pistons with respect to the cylinder bores is achieved, and the elastomer seals lift off the axial surfaces of the pump pistons during the return stroke
Implementation Method 2
The multiflow pump for fluids has an electromagnetic translatory drive (2), a displacement piston unit (3), a pump head (4) and at least one outlet valve device (10)
Data Source
AI summary
A multiflow pump for fluids, having an electromagnetic translator drive, a displacement piston unit, a pump head, and at least one outlet valve device. The displacement piston contains a bearing journal with a spring receptacle, a carrier plate, and a plurality of pump pistons, wherein the displacement piston unit is configured in one piece.