Seal of a vertical pump
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United States of America Patent
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-
Feb 15, 2005
Grant Date -
Apr 15, 2004
app pub date -
Oct 10, 2002
filing date -
Oct 10, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A seal of a vertical pump with a front casing disposed on a main casing which has a motor disposed therein. A volute chamber is disposed inside the front casing to receive a centrifugal impeller. A suction inlet is disposed axially on the front casing opposite the motor. A water outlet is disposed thereon opposite the lateral side of the impeller to engage with a discharge pipe. The suction inlet and outlet are in communication with a volute chamber. The pump has a non-contact seal disposed on the impeller. The seal can jam when a liquid crystallizes. Therefore, if no heat is generated due to the friction of the seal, the pump operates better. Furthermore, it prevents a back impeller vane from stirring the air and ejecting the liquid with a lot of air bubbles when the pump operates. Therefore, it eliminates the air bubbles from causing problems during the manufacturing process of a printed circuit board.
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