| 摘要 |
This invention relates to a ram-type mud pump comprising a pump body, a cam plate driving shaft in the said pump body, a swash plate supported on the driving shaft via a ball coupling and swayable with the rotation of the cam, at least seven rams each of which articulated with the swash plate via one of the balls of the two-ball levers and reciprocating in the corresponding cylinders, and at least seven pump ends incorporated with pump valves. It characterizes in that said ram comprises a ram body and a rubber piston at its front end, said rubber piston can slide on the ram body, a void is provided between the adjacent ram body and the rubber piston to reserve lubricating oil. A lubricating oil path is provided in the center of each body of two-ball lever and a one-way valve is provided on the oil path to prevent the lubricating oil from flowing back. |
