A water pump of a cooling system for water-cooL
In order to clarify the task of the present invention, a conventional centrifugal pump disclosed in Japanese Utility Model First Provisional Publication 61-147398 will be briefly described in the following.MUD VALVES The pump is described to be used as a water pump of a cooling system of an internal combustion engine.
The centrifugal pump generally comprises a pump casing having a spiral chamber defined therein, an impeller rotatably disposed in the spiral chamber, and a guide ridge formed on a bottom surface of the spiral chamber for guiding driven water toward a discharge port. The guide ridge is located in close vicinity of the periphery of the impeller. That is, the guide ridge is arranged between the spiral chamber and the discharge port for the purpose of moderating a pressure drop generated therebetween.
Forged Steel ValvesHowever, due to its inherent construction, the pump has failed to exhibit a satisfied pumping work. This is because of the arrangement wherein the guide ridge projects perpendicular from the bottom surface of the spiral chamber. Water Control valvesIn fact, such arrangement tends to cause generation of not a small pressure drop between the spiral chamber and the discharge port, that is, not a small cavitation therebetween. The cavitation causes erosion of the guide ridge and the impeller.
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2011-12-12
