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In a hydrodynamic journal bearing, there
- a)a very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing
- b)a thick film of lubricant between the journal and the bearing
- c)no lubricant between the journal and the bearing
- d)a forced lubricant between the journal and the bearing
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
In a hydrodynamic journal bearing, therea) a very thin film of lubric...
In the running condition, there is always a thick film of lubricant between journal and bearing.
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In a hydrodynamic journal bearing, therea) a very thin film of lubric...
Hydrodynamic Journal Bearing
In a hydrodynamic journal bearing, there is a thin film of lubricant between the journal and the bearing. This lubricant film is responsible for reducing the friction and wear between the two surfaces, allowing for smooth operation of the bearing. The correct answer is option 'B', which states that there is a thick film of lubricant between the journal and the bearing.
Explanation
A hydrodynamic journal bearing operates on the principle of fluid film lubrication. This means that the lubricant film between the journal and the bearing is thick enough to separate the two surfaces and prevent direct contact. The lubricant film is formed by the relative motion between the journal and the bearing, which creates a pressure gradient in the lubricant.
Benefits of a Thick Film of Lubricant
1. Reduced Friction: The thick film of lubricant helps to reduce the friction between the journal and the bearing. This results in lower energy consumption and improved efficiency of the bearing.
2. Improved Load Capacity: The presence of a thick film of lubricant enhances the load-carrying capacity of the bearing. This allows the bearing to support higher loads without excessive wear or damage.
3. Enhanced Vibration Damping: The thick film of lubricant helps to dampen vibrations and reduce noise levels. This is particularly important in high-speed applications where vibrations can lead to premature failure of the bearing.
4. Temperature Reduction: The presence of a thick film of lubricant helps to dissipate heat generated by friction. This prevents excessive heating of the bearing and prolongs its service life.
5. Protection Against Wear: The thick film of lubricant provides a protective barrier between the journal and the bearing, preventing direct metal-to-metal contact. This reduces wear and extends the lifespan of the bearing.
Conclusion
In a hydrodynamic journal bearing, the presence of a thick film of lubricant between the journal and the bearing is crucial for its smooth operation. This lubricant film provides numerous benefits, including reduced friction, improved load capacity, enhanced vibration damping, temperature reduction, and protection against wear.
In a hydrodynamic journal bearing, there is a thin film of lubricant between the journal and the bearing. This lubricant film is responsible for reducing the friction and wear between the two surfaces, allowing for smooth operation of the bearing. The correct answer is option 'B', which states that there is a thick film of lubricant between the journal and the bearing.
Explanation
A hydrodynamic journal bearing operates on the principle of fluid film lubrication. This means that the lubricant film between the journal and the bearing is thick enough to separate the two surfaces and prevent direct contact. The lubricant film is formed by the relative motion between the journal and the bearing, which creates a pressure gradient in the lubricant.
Benefits of a Thick Film of Lubricant
1. Reduced Friction: The thick film of lubricant helps to reduce the friction between the journal and the bearing. This results in lower energy consumption and improved efficiency of the bearing.
2. Improved Load Capacity: The presence of a thick film of lubricant enhances the load-carrying capacity of the bearing. This allows the bearing to support higher loads without excessive wear or damage.
3. Enhanced Vibration Damping: The thick film of lubricant helps to dampen vibrations and reduce noise levels. This is particularly important in high-speed applications where vibrations can lead to premature failure of the bearing.
4. Temperature Reduction: The presence of a thick film of lubricant helps to dissipate heat generated by friction. This prevents excessive heating of the bearing and prolongs its service life.
5. Protection Against Wear: The thick film of lubricant provides a protective barrier between the journal and the bearing, preventing direct metal-to-metal contact. This reduces wear and extends the lifespan of the bearing.
Conclusion
In a hydrodynamic journal bearing, the presence of a thick film of lubricant between the journal and the bearing is crucial for its smooth operation. This lubricant film provides numerous benefits, including reduced friction, improved load capacity, enhanced vibration damping, temperature reduction, and protection against wear.
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In a hydrodynamic journal bearing, therea) a very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearingb) a thick film of lubricant between the journal and the bearingc) no lubricant between the journal and the bearingd) a forced lubricant between the journal and the bearingCorrect answer is option 'B'. Can you explain this answer?
Question Description
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In a hydrodynamic journal bearing, therea) a very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearingb) a thick film of lubricant between the journal and the bearingc) no lubricant between the journal and the bearingd) a forced lubricant between the journal and the bearingCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about In a hydrodynamic journal bearing, therea) a very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearingb) a thick film of lubricant between the journal and the bearingc) no lubricant between the journal and the bearingd) a forced lubricant between the journal and the bearingCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a hydrodynamic journal bearing, therea) a very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearingb) a thick film of lubricant between the journal and the bearingc) no lubricant between the journal and the bearingd) a forced lubricant between the journal and the bearingCorrect answer is option 'B'. Can you explain this answer?.
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