WATER PUMP FOR INTERNAL COMBUSTION ENGINE
PURPOSE:To prevent a drain hole provided below a water pump from being blocked by deposition caused by evaporation of cooling water. CONSTITUTION:A chain case rear 4 for forming a chain chamber 6 is provided on the front surface of a cylinder block 2, and a pump housing 3 is fixed to the chain case...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE:To prevent a drain hole provided below a water pump from being blocked by deposition caused by evaporation of cooling water. CONSTITUTION:A chain case rear 4 for forming a chain chamber 6 is provided on the front surface of a cylinder block 2, and a pump housing 3 is fixed to the chain case rear 4. Drain holes 45, 46 are penetrating-formed in the pump housing 39 to discharge cooling water and steam which are passed in a mechanical seal 44, and opened toward the atmosphere through the communicating hole 47 of the chain case rear 4. The drain hole 46 provided downward is formed in a taper shape, and an annular groove 54 is formed so as to enclose an opening rim 46a. Therefore, the opening rim 46a is formed in an acute angle shape, in its cross section and water drop is enlarged to the annular groove 54 by surface tension. |
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