In the early 1920s, as the vertical pump motor was created, the pumping industry underwent a revolution of sorts. It let electric motors to get attached on top of a pump, and the impact that it led to was impressive. The process of installation was made simple, and since it needed fewer parts, it was much less expensive than the earlier counterparts. The efficiency of pump motors increased by thirty percent, and the vertical pump motors being purpose-specific, they became more reliable and durable than the horizontal ones. The vertical pump motors usually get classified by the shaft type, either solid or hollow.
The Features Noted In The Construction
Both solid and hollow pumps operate using the vertical turbine pumps, and they usually come with a P-base mount without feet. The construction features of the vertical pump motors influence their maintenance and application needs.
In normal thrust vertical motors, the thrust gets calculated based on the speed and the horsepower of the motor. High thrust usually gets a percentage rating depending on the normal thrust. Thrust rating comes from the thrust bearing in the motor's upper housing.
Vertical solid shaft pump motors stay connected to the pump shafts near the bottom of the motor. The shaft extension usually has a circular keyway for passing on pump thrust and the radial keyway for transmitting torque. The low-end coupling of the pump shaft and pump motor gets usually seen in shallow pumps and tanks, rather than the deep-well operations.
The most obvious difference between these varieties of pump motors is that one comes with a hollow shaft that makes its construction features different from that of a solid shaft. In hollow shaft pump motors, the pump head-shaft stays joined at the crest of the motor and extends through the motor shaft. An adjusting nut is there on the peak of the head-shaft that streamlines the regulation of the pump impeller strength.
A steady bushing usually gets installed for stabilizing and centering the hollow shaft motor in the motor shaft. When started, the motor shaft, pump shaft, and steady bushing rotate simultaneously. It results in mechanical stability similar to a solid shaft motor. Vertical hollow shaft pump motors are the most commonly seen in deep-well pumps, but they are also being selected for the pump operation that needs easy adjustability.
The kind of shaft determines the kind of coupling if it will stay externally mounted or an integrally connected motor-pump system. There are numerous other reputed manufacturers that sell both solid shaft pump motors and hollow shaft motors in all of the most popular high thrust versions.