| 摘要 |
An improved hydraulic piston pump of the kind provided with a tilting disk (22) which controls the displacements of the pistons (11). The improved pump has a compact construction and thus a low weight and it is able to operate at a very high rotational speed giving a very high output effect. These objects are achieved by providing the pump house (3) with borings (10) extending therethrough. These borings (10) house each their piston (11) and these pistons (11) are axially displaceable by means of a tilting disk (22). The inlet ends of the piston borings (10) are closed by means of a suction valve (13) of a special construction comprising for instance a washer (14) pressed into the piston boring (10). The other parts of the valve (13) are pressed against this washer (14) by the spring (12) which presses the piston (11) against the tilting disk (22). The rear cover (4) of the pump (1) is slightly conical such that when tightening the rear cover (4) against the pump house (3) there is obtained such an effective sealing that any risk for oil leaking has been eliminated and this in its turn makes it possible to manufacture the rear cover (4) from aluminium.
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