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No shaft can ever be perfectly straight or perfectly balanced. When an element of mass is a distance ' ' from the axis of rotation, centrifugal force, will tend to pull the mass outward. The elastic properties of the shaft will act to restore the "straightness". If the frequency of rotation is equal to one of the resonant frequencies of the shaft, whirling will occur. In order to save the machine from failure, operation at such whirling speeds must be avoided. Whirling is a complex phenomenon that can include harmonics but we are only going to consider synchronous whirl, where the frequency of whirling is the same as the rotational speed.
What else can I help you with?
What is shaft bearing?
A shaft bearing is a low friction support device for a rotating member of a mechanical machine.
What happen in shunt motor speed if the resistance is increased?
Its performance becomes worse. The speed will drop more when a mechanical load is put on the shaft.
What is the application of keys in mechanical engineering?
Keys are used while joining two shafts using couplings. When the shaft rotates at speeds greater than what it is designed for, The key purposefully undergoes failure and thus prevents damage to both the shaft and the coupling.
Shaft revolving in a bearing which pair?
If it is ball bearing, it is of higher pair. since the balls in the bearing have point contact with the surface. if it is a journal bearing, it is of lower pair. since the jounal is having surface contact with the shaft. This question refers to the type of pairs in a mechanical joint...
What is mechanical governor?
Governor is a device used for maintaining a constant speed of rotation of the crank shaft over long periods during which the load on the engine may vary.
Which would provide a greater mechanical advantage -a screwdriver with a 5cm handle and a 1cm shaft or a screwdriver with a 3cm handle and 1cm shaft?
The mechanical advantage of a screwdriver is determined by the ratio of the length of the handle to the length of the shaft. For the 5 cm handle and 1 cm shaft, the mechanical advantage is 5:1, while the 3 cm handle with a 1 cm shaft has a mechanical advantage of 3:1. Therefore, the screwdriver with the 5 cm handle provides a greater mechanical advantage.
What are the standard units used to measure shaft work in mechanical systems?
The standard unit used to measure shaft work in mechanical systems is the Joule (J).
How to connect a mechanical load to a motor?
To connect mechanical load to a motor, you couple it to the shaft of the motor.
What is shaft bearing?
A shaft bearing is a low friction support device for a rotating member of a mechanical machine.
Function of an engine?
Converts chemical potential energy in the fuel to mechanical work at the shaft.
What is balance mechanical seal?
Balance mechanical seal is a arrangement in centrifugal pumps that is provided to prevent leakage and corrosion of pump outer shaft. A cooling arrangement is also provided for mechanical seal.
What are the Features of stepper motor?
it is a mechanical device whereby signal will move a motor shaft degrees
Mechanical advantage of a compound machine?
MA = Revolutions of input shaft / Revolutions of output shaft. (Input torque * MA) * efficiency = Output torque Note 100% efficiency = 1.0
How do generators run?
By help of prime mover which supplies the mechanical energy to the shaft of generator(in case of dc generators).
How generator run?
By help of prime mover which supplies the mechanical energy to the shaft of generator(in case of dc generators).
What device is used to convert electricity in to mechanical energy?
An electric motor is the device that converts electricity into mechanical energy. This conversion is achieved by the interaction of magnetic fields which results in the rotation of a shaft, creating mechanical movement.
What is the difference between pump and a hydraulic motor?
A hydraulic pump will be powered by a mechanical source, such as a combustion engine or electric motor. The input shaft actuates a mechanism which pushes fluid through it, thus converting the mechanical energy into fluid energy. A hydraulic motor is powered by the flow of hydraulic fluid through it, and will use this fluid energy to power a mechanical device - typically, a shaft, thus converting fluid energy to mechanical energy.
