| 摘要 |
PROBLEM TO BE SOLVED: To cool a lubricating oil of a reciprocating plunger type pump with a simple structure. SOLUTION: A plunger case 8 is so supported as to freely slide on the outer circumference of a plunger 7 reciprocating right and left through an eccentric operation means 6 from an output axis 5 of an internal combustion engine and the inside of the case plunger case 8 is so formed as to store a lubricating oil. On the other hand, cylinder blocks 9a, 9b attached to both right and left sides of the plunger case 8 are provided separately with a water suction route 24 communicating with a high pressure part comprising a first check valve 14 and a second check valve 25 to be highly pressurized by right and left movement of the plunger 7 and a high pressure route 26 communicating with the discharge side of the high pressure part. The water suction routes 24, 24 of the pair of the cylinder blocks 9a, 9b are joined to each other by a water suction pipe 31 and on the other hand, the high pressure routes 26, 26 in the cylinder blocks 9a, 9b are joined to each other by a high pressure pipe 32 and the middle part of the water suction pipe 31 and the high pressure pipe 32 is made to communicate with an oil chamber in the plunger case 8.
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