fluid coupling: meaning, definition, pronunciation and examples
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Quick answer
What does “fluid coupling” mean?
A mechanical device that transmits rotational power between two shafts using a fluid, typically oil, as the coupling medium.
Audio
Pronunciation
Definition
Meaning and Definition
A mechanical device that transmits rotational power between two shafts using a fluid, typically oil, as the coupling medium.
In broader contexts, it can metaphorically refer to any flexible or non-rigid link or connection between systems that allows for smooth, damped transmission of motion or influence.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences; the term is technical and identical. Spelling conventions follow regional norms (e.g., 'behaviour' vs. 'behavior' in surrounding text).
Connotations
Purely technical and neutral in both regions.
Frequency
Equally low-frequency and specialized in both UK and US engineering discourse.
Grammar
How to Use “fluid coupling” in a Sentence
[noun] + has/is equipped with a fluid couplingthe fluid coupling + [verb: transmits, connects, allows]a fluid coupling between [noun] and [noun]Vocabulary
Collocations
Examples
Examples of “fluid coupling” in a Sentence
verb
British English
- The system is designed to fluid-couple the engine to the gearbox, reducing vibration.
- We need to fluid-couple these shafts for smoother operation.
American English
- The new design fluid-couples the motor directly to the pump.
- They decided to fluid-couple the components to avoid shear stress.
adverb
British English
- [Extremely rare; not standard usage]
American English
- [Extremely rare; not standard usage]
adjective
British English
- The fluid-coupling mechanism is essential for marine applications.
- We offer a fluid-coupling solution for heavy machinery.
American English
- Check the fluid-coupling unit for leaks.
- The fluid-coupling design phase is complete.
Usage
Meaning in Context
Business
Rare; might appear in procurement documents for industrial machinery.
Academic
Common in mechanical engineering textbooks and papers on powertrain design.
Everyday
Virtually never used.
Technical
Standard term in automotive, marine, and industrial engineering for a specific component.
Vocabulary
Synonyms of “fluid coupling”
Vocabulary
Antonyms of “fluid coupling”
Watch out
Common Mistakes When Using “fluid coupling”
- Using 'fluid coupling' to describe a pipe fitting (which is a 'coupling' but not fluid-based).
- Confusing it with a 'clutch' (which is a frictional, engageable/disengageable coupling).
FAQ
Frequently Asked Questions
No, a torque converter is a more complex type of fluid coupling that can multiply torque; all torque converters are fluid couplings, but not all fluid couplings are torque converters.
They are used in automotive automatic transmissions, industrial conveyor drives, marine propulsion systems, and anywhere smooth, damped power transmission is needed.
Advantages include smooth engagement, protection against shock loads, vibration damping, and tolerance for misalignment.
No, there is always some slip (speed difference between input and output), which results in energy loss as heat, making it less than 100% efficient.
A mechanical device that transmits rotational power between two shafts using a fluid, typically oil, as the coupling medium.
Fluid coupling is usually technical in register.
Fluid coupling: in British English it is pronounced /ˈfluːɪd ˈkʌplɪŋ/, and in American English it is pronounced /ˈfluːɪd ˈkʌplɪŋ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms for this technical term]”
Learning
Memory Aids
Mnemonic
Think of two fans facing each other in oil: one fan spins and makes the oil move, which then spins the other fan without them touching—this is a FLUID COUPLING.
Conceptual Metaphor
A SLIPPERY HANDSHAKE: a connection that allows some independent movement and absorbs shock.
Practice
Quiz
What is the primary medium inside a fluid coupling?