Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
pump shaft
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
The pump shaft is defined by its physical configuration as a shaft provided with specific components (impeller, bearings, bushings, sealing elements). Its identity comes from being a particular structural component within a pump assembly, not from a unique function that distinguishes it from other shaft types.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
Loading…
Disjoint with
▸
Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
⚠ not anchored
PowerTransmissionFunction → PowerTransmissionProcess
▼
COPI-Core operation
⚠ Process parent
PlannedProcess reaches no COPI-Core operation, and no gap (out of scope / coverage gap) is recorded.
LLM rationale:
A pump shaft's core function is to transmit rotational mechanical power from the driver (motor) to the impeller(s). This power transmission function is what makes it a functional shaft rather than just a structural rod. The existing PowerTransmissionFunction from the gearbox enrichment is co-extensional with this requirement.
▸
Expert review
2
Genus Proximus
✓ done
MaterialArtifact
▼
Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
The source definition identifies this as a SHAFT, but no enriched Shaft class exists in the ontology. A shaft is a rotating mechanical component that is essentially monolithic (not an assembly of removable subcomponents) and serves as a single maintainable unit within a pump. This places it under MaterialArtifact rather than Assembly. The pump shaft is not an aggregate of distinct objects, so EngineeredSystem does not apply.
▸
Expert review
3
Differentia Specifica
✓ done
∃hasComponentPartAtAllTimes.Impeller ⊓ ∃hasComponentPartAtAllTimes.Bearing ⊓ ∃partOf.Pump
▼
Conditions that distinguish
Pump Shaft
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia captures what makes this specifically a pump shaft rather than any other type of shaft: (1) it is equipped with impellers for fluid energy transfer, (2) it has associated bearings for support, and (3) it is integrated within a pump assembly. The partOf relationship is essential as the shaft's identity is defined by its role within the pump system.
▸
Expert review
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
While the definition mentions that the pump shaft is 'provided with' impeller(s), bearings, bushings, and sealing elements, these are not intrinsic parts of the shaft itself but rather components mounted on or associated with the shaft. The Known Component Terms list is empty, and the source definition uses 'provided with' rather than 'composed of', suggesting these are associated components rather than constituent parts. Without explicit part names in the sources or component terms list, no parts can be formally defined at this level.
▸
Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
∅ → ∅
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
The pump shaft receives rotational mechanical power from a driver (motor, engine, or turbine) and transmits this power to the impeller(s) which then act on the fluid. The transformation is purely mechanical power transmission with potential speed and torque modifications based on the shaft design and coupling arrangements.
▸
Expert review
More
Alternative labels
none
▼
Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
no CFIHOS/DEXPI properties
▼
No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Pump Shaft.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
Source Definitions (1)
PUMP SHAFT — ClassOfInanimatePhysicalObject
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Provenance tiers (1)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
Linked competency questions
- open What is a pump shaft?
- open Is a pump shaft a necessary component of every centrifugal pump?
OWL/Turtle preview
Download .ttl
Numeric
COPI_* IRIs from copi-iri-map.tsv, with the readable name as a trailing comment. Names not yet in the map stay readable.
Loading...
ID 421 · claude-sonnet-4-20250514
Created 2026-05-04 18:27
Updated 2026-09-08 12:26
