Gear Pump Stator Grooves for Adhesive Injection
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Solution Overview
Problem
The assembly of gear pumps, particularly the fixation of a tubular bush on a stator unit, is complicated and expensive due to mechanical play issues that hinder adhesive penetration, requiring costly machinery for injection.
Innovation Solution
Incorporating longitudinal grooves on the polar heads of the stator unit to facilitate the flow and distribution of adhesive for permanent fixation of the tubular bush, simplifying and speeding up the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is injected into the interstitial space between the bush and stator unit, then the bush is fixed immovably on the stator unit, but the mechanical play reduces adhesive penetration making the process complicated and expensive
Solution Approach 1:
The invention divides the interstitial space into multiple segments by creating grooves on the polar heads of the stator unit. These grooves segment the adhesive injection process into multiple channels, allowing adhesive to penetrate more effectively through the mechanical play and reach the bonding interface between the bush and stator unit, thereby maintaining fixation reliability while reducing assembly complexity
Solution Approach 2:
The grooves act as intermediary channels that facilitate adhesive flow from the injection point to the bonding interface. By providing these intermediate pathways, the adhesive can overcome the mechanical play barrier and achieve proper penetration without requiring complex injection machinery
2Reliability
If adhesive is injected into the interstitial space between the bush and stator unit, then the bush is fixed immovably on the stator unit, but the process requires particularly complicated and expensive machinery
Solution Approach 1:
The grooves segment the adhesive delivery system into multiple simple channels that can be served by conventional injection equipment. This segmentation allows standard machinery to achieve the penetration that would otherwise require complex specialized equipment, thereby improving manufacturing ease while maintaining fixation reliability
Solution Approach 2:
The grooves are simple structural features that can be incorporated into the stator unit design without adding significant cost. They enable the use of simpler, more economical injection machinery while achieving the same fixation result, making the overall manufacturing process more cost-effective
3Ease of operation
If mechanical play is present between the bush and stator unit, then the bush can be inserted easily, but adhesive penetration becomes extremely difficult
Solution Approach 1:
The grooves serve as intermediary pathways that bridge the gap created by mechanical play. They provide a controlled route for adhesive to travel from the injection point to the bonding interface, ensuring precise adhesive placement despite the presence of mechanical play that facilitates easy insertion
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 grooves enable quicker and more homogeneous adhesive injection, reducing production costs and complexity by ensuring secure fixation of the bush, thus streamlining the assembly process.
Implementation Method 1
an annular stator unit capable of generating a rotating magnetic field; a ring gear with inner toothing, which is inserted/fitted in an axially rotatable manner on the inside of the stator unit
Data Source
Figure 1
Figure 2
AI summary
Gear pump (1) for pumping liquids, of the type comprising: a stator unit (2), which is equipped with a substantially cylindrical cavity (3) and is designed to generate a magnetic field rotating on the inside of said cavity (3); a substantially tubular, cylindrical bush (4), which is keyed on the inside of the cavity (3) of the stator unit (2); and at least one pumping gear (5, 6) housed in an axially rotatable manner on the inside of the bush (4); one or more longitudinal grooves (12) being present in the zone of contact between the stator unit (2) and the bush (4), said longitudinal grooves extending in the interstitial space between the bush (4) and the stator unit (2) and being designed to conduct an adhesive inside the interstitial space between the bush (4) and the stator unit (2).