| 摘要 |
The invention relates to aviation technology. The technical result is high speed of rearrangement of the fan blades in reverse mode via a feathering, transition by the blades with optimal reverse angles and their return to pre-set angles by a piston (2), coarse pitch chamber (4), fine pitch chamber (5) and stall prevention chamber, and maintenance of balanced frequency of rotation of the propeller fan in reverse mode. This is achieved with the following arrangement: each of the two fan hubs (1) containing the hydraulic mechanism for adjusting the position of the blades (34) with cams (9, 10) in its discharges and with a valve (7) with plunger (8), is provided with an oil pump (20) connected to an additional chamber (21) and to a valve (22), and with slide valves (23, 24, 25, 26). In addition, the regulator connected to the aforementioned hydraulic mechanism by channels (33, 46, 47, 48) and including an oil pump (11), slide valves (12, 14, 15 and 17) and electromagnetic valves (16, 18), is provided with slide valves (30, 31) and an electromagnetic valve (32). The chamber above the valve (22) is connected via a distributor valve (27) to the channel (48) and to the outlet from the slide valve (24) whose inlet is connected to the channel (33) and discharge chamber (6). The channel (46) is connected to the chamber (4) via the slide valve (26), and the channel (47) is connected to the chamber (5) via the slide valves (26, 27) and valve (7). The slide valves (23 and 24) are kinematically connected to the cams (9, 10) whose position on the piston (2) determines, as appropriate, the angle of feathering and support of the transfer of the blades (34). The channel (33) and discharge chamber (6) are connected to the inlet of the slide valve (23) and, via the distributor valve (28), the channel (48) and outlet of the oil pump (20); to the outlet are connected the chambers above the plunger (8) and slide valve (26) and the spring chamber of said slide valve and the chamber above the slide valve (25) are connected to the channel (33), while the spring chamber is connected via the distributor valve (29) to the chamber (48) and outlet of the slide valve (24). The chambers (4, 5) are interconnected via valves (7, 25).
|
