| 摘要 |
The invention concerns a radial-piston hydraulic motor (10), which comprises one or several cylinder groups (1) placed in a stationary position, which cylinder groups contain piston mechanisms (16a1, 16a2,; 17a1, 17a2...) moving radially back and forth. The piston mechanisms (l6a1, 16a2; 17a1, 17a2...) comprise a piston (16a1, 16a2) and a press wheel (17a1, 17a2...). A hydraulic fluid is passed into the cylinder spaces (p1, p2...) of the piston mechanisms so that the press wheels (17a1, 17a2...) of the pistons (16a1, 16a2...) that are at a power stage are pressed with force against the wave-shaped face (12a) of the cam ring (12) and bring the cam ring (12) into a revolving movement. The cam ring (12) is connected with a box frame (11) and the box frame (11) with a distributor valve (13), which controls the pressurized fluid flow at the correct time into the cylinder spaces (p1, p2...) of the pistons (16a,, 16a2...) that are at the power stage, and that, at the same time, the distributor valve (13) connects the cylinder spaces (p1, p2) of the pistons (16a1, 16a2...) that start their return movement to a lower pressure. In the equipment, the sense of rotation of the motor can be reversed by reversing the direction of flow of the fluid through the distributor valve (13). The fluid is passed to the distributor valve (13) through the sets of ducts (e1, e2) in the shaft (14) which is placed in a stationary position together with the cylinder frame(s) (15) of one or several cylinder groups (1). In the distributor (13) in accordance with the invention, there is a duct (31), which communicates with the power pressure and which is opened on the side face (13a) of the distributor (13). In this connection the force is applied, through the fluid at the power pressure, to the side face (13a) of the distributor (13).
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