exported
necessary
impeller
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Impeller
Generated on 2026-04-13
Natural Language Definition
EN
An impeller is an assembly consisting of rotating vanes mounted on a hub that transfers energy to or from fluids through dynamic rotational force within an enclosure.
PT-BR
Um impulsor é um conjunto que consiste em pás rotativas montadas em um cubo que transfere energia para ou de fluidos através de força rotacional dinâmica dentro de um invólucro.
Formal Axioms
Semi-formal (Aristotelian)
Every impeller is an assembly that has rotating vanes and a hub as component parts at all times, participates in rotational motion, and bears an energy transfer function.
First-Order Logic Theory
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▸ Stored override
∀x(Impeller(x) → Assembly(x) ∧ ∃v,h(RotatingVanes(v) ∧ Hub(h) ∧ hasComponentPartAtAllTimes(x,v) ∧ hasComponentPartAtAllTimes(x,h) ∧ ∃m(RotationalMotion(m) ∧ participatesIn(x,m)) ∧ ∃f(EnergyTransferFunction(f) ∧ bearerOf(x,f))))
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix : <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix bfo: <http://purl.obolibrary.org/obo/> .
@prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> .
@prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix apv: <http://inf.ufrgs.br/ontologies/apv#> .
### COPI — Core Ontology for Petroleum Installations
### Class module: Impeller
<https://www.inf.ufrgs.br/ontologies/copi>
rdf:type owl:Ontology ;
dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ;
dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ;
dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ;
skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ;
skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ;
skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ;
skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ;
owl:versionInfo "1.1.0" ;
owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ;
owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ;
dcterms:creator "Nicolau Oyhenard dos Santos"@en ;
dcterms:contributor "Cauã Antunes" ;
dcterms:contributor "Haroldo Rojas" ;
dcterms:contributor "Rafael Petry" ;
dcterms:contributor "Régis Romeu" ;
dcterms:contributor "Mara Abel" ;
dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ;
dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ;
dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
dcterms:created "2026-04-08"^^xsd:date ;
dcterms:modified "2026-10-08"^^xsd:date ;
apv:GlobalMinLanguageCoverage "en pt-br" ;
apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ;
apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" .
iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ;
apv:MinAnnotationLength 20 .
### Identity-giving function
:COPI_0000506 rdf:type owl:Class ; # EnergyTransferFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000507 # EnergyTransferProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000507 # EnergyTransferProcess
] ;
rdfs:label "energy transfer function"@en ;
rdfs:label "função de transferência de energia"@pt-br .
### Process type
:COPI_0000507 rdf:type owl:Class ; # EnergyTransferProcess
rdfs:subClassOf :COPI_0000003 ; # MomentumTransfer
rdfs:label "energy transfer process"@en ;
rdfs:label "processo de transferência de energia"@pt-br .
:COPI_0000003 rdf:type owl:Class . # MomentumTransfer
:COPI_0000507 # EnergyTransferProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: Impeller
:COPI_0000302 rdf:type owl:Class ; # Impeller
rdfs:subClassOf iof-core:Assembly ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000506 # EnergyTransferFunction
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000624 # RotatingVanes
] ;
rdfs:label "impeller"@en ;
rdfs:label "impulsor"@pt-br ;
iof-av:naturalLanguageDefinition "An impeller is an assembly consisting of rotating vanes mounted on a hub that transfers energy to or from fluids through dynamic rotational force within an enclosure."@en ;
skos:definition "An impeller is an assembly consisting of rotating vanes mounted on a hub that transfers energy to or from fluids through dynamic rotational force within an enclosure."@en ;
iof-av:naturalLanguageDefinition "Um impulsor é um conjunto que consiste em pás rotativas montadas em um cubo que transfere energia para ou de fluidos através de força rotacional dinâmica dentro de um invólucro."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every impeller is an assembly that has rotating vanes and a hub as component parts at all times, participates in rotational motion, and bears an energy transfer function."@en ;
iof-av:firstOrderLogicAxiom "∀x(Impeller(x) → Assembly(x) ∧ ∃v,h(RotatingVanes(v) ∧ Hub(h) ∧ hasComponentPartAtAllTimes(x,v) ∧ hasComponentPartAtAllTimes(x,h) ∧ ∃m(RotationalMotion(m) ∧ participatesIn(x,m)) ∧ ∃f(EnergyTransferFunction(f) ∧ bearerOf(x,f))))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive classification based on physical mechanism. Under OWA, defining sufficient conditions for the rotating vane assembly could lead to false positives where other rotating equipment with vanes (like turbine rotors or fan assemblies) might be incorrectly classified as impellers when they should remain in their specific equipment categories."@en ;
skos:definition "[ISO 15926-4] An <IMPELLER> is a <MECHANICAL TO MECHANICAL ENERGY CONVERTER> that is an assembly of rotating vanes within an enclosure which is used to impart energy to or derive energy from a fluid through dynamic force"@en ;
skos:definition "[DEXPI] An energy converter component that is an assembly of rotating vanes within an enclosure which is used to impart energy to or derive energy from a fluid through dynamic force (from ``_)."@en ;
skos:definition "[SLB Glossary] In electromagnetics or electrical circuit theory, the ratio of voltage to current when these are represented by phasor quantities in alternating current circuits. (A phasor is a complex number that represents the amplitude and phase of a quantity that varies sinusoidally in time.) Electrical impedance, also symbolized by Z, is a complex number that has the same units (ohms) as resistivity."@en ;
skos:definition "[OnePetro] The rotating pump component that drives the fluid in a centrifugal pump."@en .
:COPI_0000624 rdf:type owl:Class ; # RotatingVanes
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "palhetas rotativo"@pt-br ;
rdfs:label "rotating vanes"@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
EnergyTransferFunction
⊑ DesignedFunction
Realized in
EnergyTransferProcess
⊑ MomentumTransfer
The identity-giving function is the general energy transfer capability - impellers are designed to transfer energy to or from fluids through dynamic force. This is the fundamental function that makes an impeller an impeller, whether in pumps, compressors, mixers, or turbines.
2
Genus Determination
Assembly
bfo:Object (BFO_0000030)
Causally unified material artefact composed of physically connected,
separable MaterialComponent parts. Satisfies
Assembly ⊑ MaterialArtifact ⊑ bfo:Object.
No domain-specific superclass exists in the parent candidates or enriched classes. Impeller is itself a root equipment category with many subtypes (pump impeller, compressor impeller, mixer impeller). It is clearly an assembly of physically connected parts (hub, vanes, potentially shrouds) that form a causally unified whole, making Assembly the appropriate genus.
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| RotatingVanes | MaterialArtifact | hasComponentPartAtAllTimes |
Hub and rotating vanes are universal components across all impeller types. Shrouds, backing plates, and other components vary by specific impeller design (open, closed, semi-open).
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— any phase - liquid, gas, or multiphase
Outputs (O)
PortionOfFluid
— same fluid with altered energy state
Transformation (T)
mechanical energy transfer to/from fluid through dynamic rotational force
Impellers work with any fluid type and transfer mechanical rotational energy to change the fluid's kinetic and/or pressure energy. The transformation is mechanical-to-fluid energy transfer or vice versa.
5
Axiom Mode Decision
Necessary conditions only
— modelled as a primitive universal
(⊑, SubClassOf). Identity is grounded in designed
function and cannot be reduced to a property checklist.
Constructive classification based on physical mechanism. Under OWA, defining sufficient conditions for the rotating vane assembly could lead to false positives where other rotating equipment with vanes (like turbine rotors or fan assemblies) might be incorrectly classified as impellers when they should remain in their specific equipment categories.
Cross-Standard Observations
ISO 15926 and DEXPI provide consistent structural definitions focusing on rotating vanes for energy transfer. SLB Glossary entry appears to be mismatched (describes electrical impedance). OnePetro provides a more specific pump context but aligns with the general rotating component concept.
