| 摘要 |
PCT No. PCT/DK84/00020 Sec. 371 Date Nov. 20, 1984 Sec. 102(e) Date Nov. 20, 1984 PCT Filed Mar. 20, 1984 PCT Pub. No. WO84/03644 PCT Pub. Date Sep. 27, 1984.A plant for de-icing especially surfaces of aeroplanes, comprising the use of at least two sources (10, 12) of liquid media that are different from each other and capable of being sprayed separately or as a mixture, comprising a number of positive liquid pumps (16, 22) corresponding to the number of media, which pumps all have the same capacity or a predetermined interrelated capacity ratio and terminate in a common spray pipe (24). The connection of the liquid pumps to the sources includes at least one of the sources to at least one of the liquid pumps. In a hydraulic system comprising hydraulic motors (56, 52) for driving the liquid pumps (16, 22) at least two of motors are connected to a common hydraulic pressure pump (32) controlled by way of pressure compensation (33) to work with at least two pressure stages subject to a ratio corresponding to that of the capacity of at least one liquid pump to the total capacity of both liquid pumps. In such a plant the compostion of the spray liquid to be dispensed is determined solely by the capacity of the liquid pumps, thereby eliminating any throttling effects which may cause the de-icing medium to coagulate. |
