Offset Commutator Manifold Assembly for Hydraulic Flow Control

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Solution Overview

Problem

Conventional hydraulic motor assemblies experience significant flow losses and excessive heat generation due to high angle shifts in fluid flow paths, leading to component wear and inefficiency in gerotor motor systems.

Innovation Solution

A commutator/manifold assembly with an offset commutator design and straight configuration of manifold ports, allowing hydraulic fluid to flow directly through the manifold without directional restrictions, reducing flow losses and wear.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional manifold porting with high angle shifts is used, then proper timing and flow pathways between motor pockets and commutator ports are achieved, but flow losses increase and heat generation becomes excessive

Engineering Contradiction:
Improveproper timing and flow pathwaysVSAvoidflow losses and heat generation
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies asymmetry by configuring the manifold ports with different orientations on opposite sides of the manifold. Specifically, the first port is angled at a first angle relative to the longitudinal axis while the second port is angled at a second angle in the opposite direction. This asymmetric configuration enables straight flow paths through the manifold without requiring high angle shifts, thereby reducing flow losses and heat generation while maintaining proper timing and flow pathways between motor pockets and commutator ports.

Inventive Principle:
Principle #4Asymmetry

2Shape

If tight cornering in flow path is implemented, then directional change in flow is achieved, but flow restriction increases and component wear accelerates

Engineering Contradiction:
Improveflow path directionVSAvoidflow restriction and component wear
Core Design Contradiction:
ShapeVSObject-affected harmful factors

Solution Approach 1:

The patent applies curvature principles by designing smooth, gradual transitions in the flow paths through the manifold. The ports are configured with angled orientations that create smooth flow transitions rather than sharp corners. The flow paths include rounded edges and gradual direction changes that reduce turbulence and flow restriction, thereby minimizing component wear while achieving the necessary directional change in fluid flow from the commutator to the motor pockets.

Inventive Principle:
Principle #14Spheroidality (Curvature)

3Shape

If 90 degree angle shift in flow direction is used, then input and output flows are separated, but flow path restriction becomes highly restrictive

Engineering Contradiction:
Improveflow path configurationVSAvoidflow efficiency
Core Design Contradiction:
ShapeVSProductivity

Solution Approach 1:

The patent applies dimensionality change by utilizing the lateral dimension of the manifold to create separated flow paths. Instead of using a single longitudinal dimension with 90-degree angle shifts, the manifold incorporates ports angled in opposite directions from the longitudinal axis, effectively using the lateral dimension to separate input and output flows. This creates parallel, non-interfering flow paths that maintain high flow efficiency while achieving the necessary separation between input and output flows.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 solution significantly reduces flow losses and wear, enhancing efficiency and extending component lifespan by eliminating high angle restrictions in fluid flow paths.

Implementation Method 1

A commutator/manifold assembly with an offset commutator design and straight configuration of manifold ports, allowing hydraulic fluid to flow directly through the manifold without directional restrictions, reducing flow losses and wear.

Methodology Applied
Scientific EffectHydraulic fluid flow:

Data Source

PatentUS10947848B2Direct port commutator and manifold assembly
Publication Date: 2021.03.16 PARKER INTANGIBLES LLC
  • US10947848B2 patent drawing
  • US10947848B2 patent drawing
  • US10947848B2 patent drawing

AI summary

A commutator/manifold assembly controls a flow of hydraulic fluid in a hydraulic fluid system. The assembly includes a commutator having an offset design including an inner portion eccentrically encompassed within an outer portion, and offset commutator porting to control the hydraulic flow. A manifold includes manifold ports having a straight configuration by which walls defining the manifold ports run substantially along a longitudinal axis through an entirety of the manifold. The commutator is configured to rotate to sequentially align the commutator porting with differing portions of the manifold ports to control the flow. The commutator porting includes inner ports and outer ports that are isolated from each other by a commutator seal. A commutator ring has a guiding surface that guides rotation of the commutator. The rotation of the commutator provides a timed flow through the manifold ports straight through the manifold and without any directional flow restriction.