Sliding Vane Pump Positioning Ring for Uniform Loading

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Solution Overview

Problem

Sliding vane fluid pumps face challenges in maintaining vane contact with the stator periphery due to hydraulic forces, leading to uneven loading and reduced durability, and existing solutions like push rods are difficult to assemble and limited to four vanes.

Innovation Solution

A positioning ring is introduced within the rotor central chamber, radially aligned with the midpoint of each vane, to ensure consistent contact with the stator recess peripheral surface, preventing uneven loading and ensuring smooth operation and long durability, while allowing for any number of vanes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If push rods are used to maintain vane contact with stator periphery, then vane contact is improved, but device complexity increases and assembly difficulty increases

Engineering Contradiction:

Improvevane contact maintenanceVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the essential function of push rods (maintaining vane contact) and implements it through a simplified positioning ring that engages with vanes at their midpoints. This eliminates the need for complex push rod mechanisms while achieving the same contact maintenance goal.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The positioning ring is segmented into multiple engagement points around the rotor circumference, with each segment engaging a specific vane at its midpoint. This segmentation allows the single positioning ring to control multiple vanes independently, reducing overall structural complexity.

Inventive Principle:

Principle #1Segmentation

2Reliability

If push rods are used to maintain vane contact, then vane contact is improved, but ease of manufacture decreases

Engineering Contradiction:

Improvevane contact maintenanceVSAvoidassembly ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent removes the complex push rod assembly mechanism and replaces it with a positioning ring that can be installed as a single component. This extraction of complex functionality simplifies manufacturing and assembly processes while maintaining vane contact reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of manufacture

If control rings are used instead of push rods, then ease of assembly is improved, but manufacturing precision requirements increase leading to uneven loading

Engineering Contradiction:

Improveassembly easeVSAvoidloading uniformity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The positioning ring applies localized contact force at the midpoint of each vane, creating uniform loading conditions. This local quality approach ensures that each vane receives equal force distribution, preventing uneven loading while maintaining assembly simplicity.

Inventive Principle:

Principle #3Local quality

4Reliability

If push rods are used, then vane contact is maintained, but adaptability is limited to four vanes

Engineering Contradiction:

Improvevane contact maintenanceVSAvoidvane number flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The positioning ring is designed with universal applicability, featuring multiple engagement points that can accommodate any number of vanes around the rotor circumference. This multi-functional design allows the same positioning ring mechanism to work with different vane configurations, eliminating the four-vane limitation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 positioning ring effectively maintains vane contact with the stator, preventing uneven loading and ensuring smooth operation and extended durability, and allows for the use of any number of vanes beyond the four-vane limitation of push rod systems.

Implementation Method 1

Centrifugal force provides some force to urge the vanes into contact with the outer periphery of the opening of the stator

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

the vanes must slide within their respective slots to maintain contact with the outer periphery of the opening of the stator

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 3

The rotor and vanes are received within an opening of a stator such that the opening is eccentric the rotor. Due to the eccentric nature of the opening in the stator, the pumping chambers expand and contract as the rotor is rotated.

Methodology Applied

Scientific EffectEccentric mechanism: Eccentric

Data Source

PatentUS11686200B2Sliding vane fluid pump

Publication Date: 2023.06.27 PHINIA JERSEY HOLDINGS LLC

AI summary

A fluid pump includes a rotor which is centered about an axis, the rotor having a rotor central chamber and a plurality of vane slots. A stator has a recess therein within which the rotor is located, the recess having a recess peripheral surface which is eccentric to the axis. Each vane slot includes a vane therein such that the vanes define a plurality of pumping chambers which expand and contract based on rotational position the rotor relative to the stator. A positioning ring is located within the rotor central chamber such that the positioning ring engages each vane and such that the positioning ring urges each vane into contact with the recess peripheral surface. The positioning ring is radially aligned with a midpoint of each vane.