Direct Impeller Rotor Sleeve Pump Design

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Solution Overview

Problem

Existing fluid pumps for motor vehicles face challenges in reducing installation space and weight while maintaining cost-efficiency and simplicity in production.

Innovation Solution

A fluid pump design where the impeller is directly connected to a rotor receiving sleeve in a rotationally fixed manner, eliminating the need for a metallic axle and allowing for a one-piece or monolithic impeller and cover, which simplifies production and reduces weight by eliminating individual installation steps.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a metallic axle is used to transfer force from rotor to impeller, then torque transmission is reliable, but weight increases and installation space is consumed

Engineering Contradiction:

Improvetorque transmissionVSAvoidpump weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent removes the metallic axle from the system entirely. The rotor receiving sleeve is designed with an integrated torque transmission mechanism where the rotor directly transfers torque to the impeller through the sleeve's internal structure, eliminating the need for a separate metallic axle component.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The rotor receiving sleeve combines multiple functions: it receives the rotor, transmits torque from the rotor to the impeller, and provides structural support. This merging of functions into a single component reduces the number of parts and eliminates the need for a separate metallic axle.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a metallic axle is used to transfer force from rotor to impeller, then torque transmission is reliable, but installation space increases

Engineering Contradiction:

Improvetorque transmissionVSAvoidinstallation space

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The metallic axle is completely removed from the design. The rotor receiving sleeve is engineered to provide direct torque transmission pathways from the rotor to the impeller through its wall structure, eliminating the space requirement for a separate axle component.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The rotor is nested within the rotor receiving sleeve, which itself is integrated with the impeller structure. This nested arrangement allows torque transmission through the walls of the sleeve without requiring additional external components or increased installation space.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Ease of manufacture

If impeller and cover are produced as separate components, then assembly flexibility is maintained, but production complexity and installation time increase

Engineering Contradiction:

Improveproduction simplicityVSAvoidassembly time

Core Design Contradiction:

Ease of manufactureVSLoss of time

Solution Approach 1:

The impeller and cover are merged into a single monolithic component. This integrated design eliminates the need for separate manufacturing and assembly steps for these two parts, reducing production complexity and assembly time while maintaining structural integrity.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of manufacture

If multiple separate components are used in the pump design, then manufacturing flexibility is maintained, but device complexity and weight increase

Engineering Contradiction:

Improvemanufacturing flexibilityVSAvoidpump structure

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The rotor receiving sleeve and impeller are merged into an integrated structure where the sleeve forms part of the impeller assembly. This reduces the total component count and structural complexity while maintaining manufacturing flexibility through modular design of other pump components.

Inventive Principle:

Principle #5Merging (Combining)

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 achieves a compact, lightweight fluid pump with reduced production costs and simplified assembly, enabling efficient fluid conveyance while maintaining effective torque transmission.

Implementation Method 1

the fluid pump has an impeller (13), which conveys the fluid to be conveyed by means of a rotational movement

Methodology Applied

Scientific EffectRotational movement:

Implementation Method 2

an impeller is directly connected to a rotor receiving sleeve in a rotationally fixed manner... direct torque transmission between base body and impeller

Methodology Applied

Scientific EffectDirect torque transmission:

Data Source

PatentUS11028851B2Liquid pump including an impeller connected directly to a rotor receiving sleeve

Publication Date: 2021.06.08 MAHLE INT GMBH

AI summary

A fluid pump for conveying a fluid may include an internal rotor rotatable about an axis of rotation relative to an external stator and an impeller connected to the internal rotor in a rotationally fixed manner configured to convey a fluid. The internal rotor may include a rotor receiving sleeve having a base body. The base body may include a receiving chamber configured to receive an anchor unit. The internal rotor may further include a bearing bushing penetrating the rotor receiving sleeve coaxially to the axis of rotation. The bearing bushing may be configured to receive a rotor shaft. The impeller may be directly connected to the rotor receiving sleeve in a rotationally fixed manner.