| 摘要 |
<p>A hydraulic aggregate for supply and control of smaller hydraulic consumers, particularly cylinders (551, 552), for the control of a brake and a clutch in a forestry winch (99) comprises at least a hydraulic medium tank (510), a pump (500) to assure a required pressure of the hydraulic medium and a control assembly (550) consisting of at least one control valve (555) and at least one cylinder (551, 552). It is foreseen according to the invention that a piston pump (500) is included into the hydraulic aggregate (50) circuit, and is connected with the control assembly (550) and the hydraulic medium tank (510) via a non-return valve (540) transmitting hydraulic medium in the direction away form the pump (500) but not in the direction towards the pump (500) on the one hand, and on the other hand, is connected in series to the hydraulic circuit together with a pressure accumulator (520) and the previously mentioned non-return valve (540) either via a switchover valve (530) comprising a non-return valve (335) transmitting hydraulic medium in the direction towards the pump (500) but not in the opposite direction, or, in the case of exceeding the set-in-advance pressure due to automatic rerouting of the switchover valve (530), to the hydraulic circuit comprising the mentioned pump (500), the switchover valve (530), the control assembly (550) and the mentioned non-return valve (540) in the series connection. The hydraulic aggregate excels in small dimensions, exceptionally low quantity of applied hydraulic medium and low hydraulic losses.</p> |
