Podcast
Questions and Answers
What is the purpose of balancing rotating and reciprocating parts?
What is the purpose of balancing rotating and reciprocating parts?
- To bend the shaft and produce vibrations
- To minimize pressure on main bearings and reduce vibrations (correct)
- To increase the loads on bearings
- To set up dynamic forces
Why is it important to balance rotating masses in engines?
Why is it important to balance rotating masses in engines?
- To maximize the loads on bearings
- To increase the effect of centrifugal force
- To produce dangerous vibrations
- To balance out dynamic forces and reduce stresses (correct)
What is the purpose of attaching a second mass to a rotating shaft?
What is the purpose of attaching a second mass to a rotating shaft?
- To amplify the effect of centrifugal force
- To increase vibrations in the shaft
- To bend the shaft further
- To counteract the centrifugal force of the first mass (correct)
What are the consequences of not properly balancing rotating parts?
What are the consequences of not properly balancing rotating parts?
What is meant by balancing of rotating masses?
What is meant by balancing of rotating masses?
How does balancing a single rotating mass by a single mass in the same plane help?
How does balancing a single rotating mass by a single mass in the same plane help?
What does the closing side ae represent as per the polygon law of forces?
What does the closing side ae represent as per the polygon law of forces?
In the context of balancing masses, why is the balancing force equal to the resultant force?
In the context of balancing masses, why is the balancing force equal to the resultant force?
What is the magnitude of the balancing mass required at a radius of rotation of 0.2 m in the given scenario?
What is the magnitude of the balancing mass required at a radius of rotation of 0.2 m in the given scenario?
What is the purpose of balancing reciprocating masses in an engine mechanism?
What is the purpose of balancing reciprocating masses in an engine mechanism?
How are the forces FR and FI related in a reciprocating engine mechanism?
How are the forces FR and FI related in a reciprocating engine mechanism?
Why do reciprocating masses cause objectionable vibrations in engine mechanisms?
Why do reciprocating masses cause objectionable vibrations in engine mechanisms?
What is the purpose of adding appropriate balancing mass in reciprocating mechanisms?
What is the purpose of adding appropriate balancing mass in reciprocating mechanisms?
What is the purpose of balancing the reciprocating masses in an engine mechanism?
What is the purpose of balancing the reciprocating masses in an engine mechanism?
What is the correct relationship between the mass of the reciprocating parts (m), connecting rod length (l), and crank radius (r) in a reciprocating engine mechanism?
What is the correct relationship between the mass of the reciprocating parts (m), connecting rod length (l), and crank radius (r) in a reciprocating engine mechanism?
How is the primary unbalanced force in a reciprocating engine related to centrifugal force?
How is the primary unbalanced force in a reciprocating engine related to centrifugal force?
In locomotives, what is the reason for having cranks placed at right angles to each other?
In locomotives, what is the reason for having cranks placed at right angles to each other?
What is the effect of adding appropriate balancing mass to reciprocating masses in mechanisms?
What is the effect of adding appropriate balancing mass to reciprocating masses in mechanisms?
What is the primary purpose of balancing the reciprocating masses in engines?
What is the primary purpose of balancing the reciprocating masses in engines?
Why are locomotives classified into inside cylinder and outside cylinder types?
Why are locomotives classified into inside cylinder and outside cylinder types?
Which statement best describes the effect of reciprocating parts on engine mechanisms?
Which statement best describes the effect of reciprocating parts on engine mechanisms?
What is the main reason for partially balancing reciprocating masses in engines?
What is the main reason for partially balancing reciprocating masses in engines?
How do locomotives differ based on coupling?
How do locomotives differ based on coupling?
What conditions must be satisfied to achieve a complete secondary balance of an engine?
What conditions must be satisfied to achieve a complete secondary balance of an engine?
What is the method used in balancing radial or V-engines with connecting rods connected to a common crank?
What is the method used in balancing radial or V-engines with connecting rods connected to a common crank?
Which crank is known as the direct crank in a reciprocating engine mechanism?
Which crank is known as the direct crank in a reciprocating engine mechanism?
What happens when the direct crank rotates in a clockwise direction?
What happens when the direct crank rotates in a clockwise direction?
How is the primary force due to the mass of reciprocating parts affected when the mass is divided into two parts?
How is the primary force due to the mass of reciprocating parts affected when the mass is divided into two parts?
Where are the two masses (each m/2) placed for the secondary effects when replacing the mass of reciprocating parts?
Where are the two masses (each m/2) placed for the secondary effects when replacing the mass of reciprocating parts?
What is the condition for static balance when the plane of the disturbing mass lies on one end of the planes of the balancing masses?
What is the condition for static balance when the plane of the disturbing mass lies on one end of the planes of the balancing masses?
How can the magnitude and direction of the balancing mass be obtained analytically?
How can the magnitude and direction of the balancing mass be obtained analytically?
What must be done to balance a system with multiple masses rotating in the same plane?
What must be done to balance a system with multiple masses rotating in the same plane?
In terms of balancing force, what does equation (i) represent?
In terms of balancing force, what does equation (i) represent?
What is required to find out the balancing force in plane L or the dynamic force at bearing Q?
What is required to find out the balancing force in plane L or the dynamic force at bearing Q?
What is essential to balance several masses rotating in the same plane?
What is essential to balance several masses rotating in the same plane?
How can one obtain the magnitude and position of the balancing mass graphically?
How can one obtain the magnitude and position of the balancing mass graphically?
What is represented by tanθ = SV / SH in finding the balancing force?
What is represented by tanθ = SV / SH in finding the balancing force?
'Balancing of Several Masses Rotating in the Same Plane' requires finding what quantity analytically or graphically?
'Balancing of Several Masses Rotating in the Same Plane' requires finding what quantity analytically or graphically?
What is the purpose of introducing two balancing masses rotating in different planes?
What is the purpose of introducing two balancing masses rotating in different planes?
What is the main purpose of balancing a single rotating mass with two masses rotating in different planes?
What is the main purpose of balancing a single rotating mass with two masses rotating in different planes?
What are the conditions that must be satisfied for dynamic balancing when using two balancing masses in different planes?
What are the conditions that must be satisfied for dynamic balancing when using two balancing masses in different planes?
In what scenario would the plane of the disturbing mass lie between the planes of the two balancing masses?
In what scenario would the plane of the disturbing mass lie between the planes of the two balancing masses?
What is essential for static balancing when using two balancing masses in different planes?
What is essential for static balancing when using two balancing masses in different planes?
Which arrangement helps in reducing any tendency for the shaft to rock in its bearings?
Which arrangement helps in reducing any tendency for the shaft to rock in its bearings?
Why is it important for the net dynamic force acting on the shaft to be zero?
Why is it important for the net dynamic force acting on the shaft to be zero?
How does introducing two balancing masses in different planes contribute to dynamic balancing?
How does introducing two balancing masses in different planes contribute to dynamic balancing?
What is the effect of an unbalanced primary force along the line of stroke due to partial balancing of reciprocating parts?
What is the effect of an unbalanced primary force along the line of stroke due to partial balancing of reciprocating parts?
What is the maximum magnitude of the unbalanced force perpendicular to the line of stroke known as?
What is the maximum magnitude of the unbalanced force perpendicular to the line of stroke known as?
In a multi-cylinder in-line engine, what condition must be satisfied to achieve primary balance?
In a multi-cylinder in-line engine, what condition must be satisfied to achieve primary balance?
What is treated as one of revolving masses when achieving primary balance in a multi-cylinder engine?
What is treated as one of revolving masses when achieving primary balance in a multi-cylinder engine?
What angle should (cos - sin) be for the tractive force to be maximum or minimum in two-cylinder locomotives?
What angle should (cos - sin) be for the tractive force to be maximum or minimum in two-cylinder locomotives?
What must be done in multi-cylinder in-line engines when balancing secondary forces due to reciprocating masses?
What must be done in multi-cylinder in-line engines when balancing secondary forces due to reciprocating masses?
What does it mean for the primary force polygon in a multi-cylinder engine to 'close'?
What does it mean for the primary force polygon in a multi-cylinder engine to 'close'?
