Rotary Pump Vane Truss Structure for Oil Drainage

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Solution Overview

Problem

Rotor pumps with vanes are prone to liquid accumulation, particularly lubricating oil, due to their complex framework structure, which complicates production and maintenance.

Innovation Solution

The vane design features a truss structure with a longitudinal axis parallel to the wing axis, incorporating internal compartment walls at angles to external walls for optimal force support and easy assembly, with injection-molded or extruded wing bodies and hollow insertion pins for secure, weight-reduced attachment of the wing tip, allowing for efficient drainage of lubricating oil.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a complex framework structure is used in the vane, then structural strength is improved, but liquid accumulation occurs and production complexity increases

Engineering Contradiction:

Improvestructural strengthVSAvoidproduction complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The framework structure is divided into multiple truss chambers separated by internal compartment walls, creating a segmented structure that maintains strength while facilitating liquid drainage and simplifying production

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The harmful function of liquid accumulation is eliminated by adding drainage functionality through the longitudinal truss chamber design, allowing liquid to be extracted and drained away from the framework structure

Inventive Principle:

Principle #2Taking out (Extraction)

2Strength

If a complex framework structure is used in the vane, then structural strength is improved, but liquid accumulation occurs

Engineering Contradiction:

Improvestructural strengthVSAvoidliquid accumulation

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The framework is segmented into multiple truss chambers that facilitate liquid drainage pathways, preventing accumulation while maintaining structural integrity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The longitudinal truss chambers convert the harmful liquid accumulation into a beneficial drainage system, where liquid flows along the chambers and exits through drain openings, transforming a problem into a solution

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Manufacturing precision

If the vane body is made as a continuously cast part, then manufacturing precision is improved, but weight increases

Engineering Contradiction:

Improvemanufacturing precisionVSAvoidvane weight

Core Design Contradiction:

Manufacturing precisionVSWeight of moving object

Solution Approach 1:

The vane is divided into separate components (wing body and wing tip) that can be manufactured with high precision using extrusion, while the hollow insertion pins reduce overall weight through material removal

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Hollow insertion pins are used instead of solid pins, creating thin-walled structures that maintain structural function while significantly reducing weight

Inventive Principle:

Principle #30Flexible shells and thin films

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 prevents liquid accumulation, simplifies production and maintenance, and reduces weight while ensuring secure attachment of the wing tip, enhancing the rotor pump's operational efficiency and ease of use.

Implementation Method 1

To reduce weight, it is provided that the insertion pin or pins are hollow

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

the journal can be provided with one or more drain openings through which accumulating lubricating oil drains

Methodology Applied

Scientific EffectGravity: Gravitation

Implementation Method 3

the area opposite the depression or recess when the pin is inserted can be deformed into the depression or recess. After the wing tip has been mounted on the wing body and the pin is located in the framework chamber, the area opposite the depression or recess is deformed, for example by means of a pressing tool

Methodology Applied

Scientific EffectPlastic deformation: Plasticity

Data Source

PatentEP2002084B1Rotary pump and vane for a rotary pump

Publication Date: 2012.01.04 JOMA POLYTEC GMBH

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AI summary

The invention relates to a vane for a rotary pump comprising a pump housing and a rotor, mounted to rotate therein, the vane being mounted to be displaceable in the rotor and resting with its vane tip that protrudes from the rotor against an inner circumferential surface of the pump housing. The vane tip is a separate component and extends the tip base in the longitudinal direction thereof, the vane base having a framework structure at an angle to its longitudinal direction. The invention also relates to a rotary pump comprising said vane.