| 摘要 |
The invention relates to a hydraulic pump with axial pistons, which can simultaneously deliver three distinct flow-rates which can supply three separate circuits of a hydraulic drive operating with mineral oil. According to the invention, the pump comprises a central body (1) in which nine bushings (2) are axially arranged and equally spaced apart, on a dividing diameter, in each of them there being introduced a tube-shaped piston (3), they sliding under the pressure of some springs (6) driven by a wobbling disc (11) provided with a friction disc (9), by means of some detachable heads (7) and some spherical shoes (8), the drive being performed by a driving shaft (12), where the pistons (3) are provided with some blade-shaped intake valves (4) and the bushings (2) with some blade-shaped delivery valves (5), the oil being sucked into some chambers (a) and then pushed into other chambers (b) which are symmetrically arranged and grouped three by three, corresponding to three separate channels (c, d and e), three distinct oil flow rates being formed thereby at three external orifices cut in a delivery cover (15), said flow rates being adjustable or not between themselves, another cover (13) being attached to the central body (1) by means of some screws and having at the bottom part an intake orifice (f) and at the top part a venting and filling plug (14). |
