Speed Reduction Gearbox
REDUCTION GEARBOX DESIGN
PROJECT DESCRIPTION You are the designer and you have been asked to design a speed reducer that will take power from the shaft of an electric motor rotating at 1500 rpm and deliver it to a machine that is to operate at approximately 750 rpm. Assume that you have decided to use spur gears to transmit the power and you are proposing to use a single-reduction speed reducer.
The power to be transmitted by the shaft is 20 KW and the input shaft is coupled to the motor shaft. Each of the shafts is supported by two ball or roller bearings that need to be specified by you with an overall reliability of 95% and a design life of 20 000 hours are desired.
The following list gives some of the important parameters for each gear: * The number of teeth, N * The form of the teeth (involute tooth profile) * The size of the teeth as indicated by the module, m [mm] * The face width of the teeth, F [mm] * The pith diameter (dp) for each of the gears, [mm] * The means of attaching the gear to its shaft (such as : keys and keyways) * The means of locating the gear axially on the shaft (collars, retaining rings, etc.) * The degree of precision of the gear teeth (you will need to decide on Qv based on the pitch line velocity V of the pair * Other geometry related to spur gears
INTRODUCTION
Reduction gearboxes are used in all industries where power transmission occurs; they reduce speed and increase torque. They can be found between the prime mover (electric motor, gas, diesel or steam engine, etc.) and the driven equipment (conveyors, mills, paper machines, elevators, screws, agitators, etc.). An industrial gearbox is defined as a machine for the majority of drives requiring a reliable life and factor of safety.
This project focuses on the design of a reduction gearbox that will take power from the shaft of an electric motor rotating at 1500 rpm and deliver it to a machine that is to
PROJECT DESCRIPTION You are the designer and you have been asked to design a speed reducer that will take power from the shaft of an electric motor rotating at 1500 rpm and deliver it to a machine that is to operate at approximately 750 rpm. Assume that you have decided to use spur gears to transmit the power and you are proposing to use a single-reduction speed reducer.
The power to be transmitted by the shaft is 20 KW and the input shaft is coupled to the motor shaft. Each of the shafts is supported by two ball or roller bearings that need to be specified by you with an overall reliability of 95% and a design life of 20 000 hours are desired.
The following list gives some of the important parameters for each gear: * The number of teeth, N * The form of the teeth (involute tooth profile) * The size of the teeth as indicated by the module, m [mm] * The face width of the teeth, F [mm] * The pith diameter (dp) for each of the gears, [mm] * The means of attaching the gear to its shaft (such as : keys and keyways) * The means of locating the gear axially on the shaft (collars, retaining rings, etc.) * The degree of precision of the gear teeth (you will need to decide on Qv based on the pitch line velocity V of the pair * Other geometry related to spur gears
INTRODUCTION
Reduction gearboxes are used in all industries where power transmission occurs; they reduce speed and increase torque. They can be found between the prime mover (electric motor, gas, diesel or steam engine, etc.) and the driven equipment (conveyors, mills, paper machines, elevators, screws, agitators, etc.). An industrial gearbox is defined as a machine for the majority of drives requiring a reliable life and factor of safety.
This project focuses on the design of a reduction gearbox that will take power from the shaft of an electric motor rotating at 1500 rpm and deliver it to a machine that is to
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