Use Of Gears With Pump Drives

The main use of gearing in pump drives is to reduce the speed of the prime mover (a motor or an engine) to the level applicable to the pump. In some cases, however, the gears are employed to step up the speed because the pump must operate at a speed higher than that of the prime mover.

There are other jobs that gear drives must perform with pump units. For instance, a vertical pump may be combined with a prime mover that must operate horizontally (as in the case of a diesel engine). A right-angle gear set (Figures 1 and 4) can be incorporated into the drive of such a combination to transmit the power "around the corner" even if the gears are of a 1:1 ratio and no speed change is involved. See a word of caution concerning even ratio gears, "Minimizing Gear Noise," item 9.

At times, too, a gear drive must combine the power shafts of two prime movers; for example, an electric motor and a diesel engine. This combination is desirable where there is a need for emergency power in cases of electric power failure. The motor is used ordinarily and the diesel is reserved for emergencies. In such an arrangement, the motor may be mounted vertically on top of the gear drive to drive right through the shaft, whereas the diesel is geared at right angles to the motor.

Gear drives are also used to vary the speed of a pump. Change gear arrangements (Figure 2) may be used to vary the gear ratio. Also, numerous types of variable-speed devices, such as variable-speed pulley belts, friction rollers, hydraulic couplings, hydrostatic and hydroviscous drives, eddy-current and electric drives, are often utilized.

Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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