会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明专利
    • DE1241272B
    • 1967-05-24
    • DEB0075015
    • 1964-01-16
    • BOELKOW GMBH
    • PFLEIDERER DIPL-ING KURT
    • B23Q5/26B23Q39/04B64C27/54B64C27/635B64C27/64G04D1/00G04D3/00
    • 1,090,915. Rotary wing aircraft. BOLKOW G.m.b.H. Jan. 18, 1965 [Jan. 16, 1964], No. 2136/65. Heading B7W. [Also in Division G3] A helicopter rotor blade is mounted for leadlag pivoting and is given an impulse, producing a movement about the lead-lag hinge, at a predetermined angular position to ensure that the pivoting motion is correctly phased. In Fig. 1, the rotor blade 31, pivoted at 60 is connected to the piston 28 of a hydraulic servomotor to which fluid is supplied from a pump 7 and reservoir 6, through a rotary valve having a non-rotating part 5 and a part 5a rotating with the rotor and the rest of the hydraulic system. For 5 degrees in each revolution, the valve is in the position shown allowing fluid to move to the right a shuttle valve 19 and the piston 28. For another 5 degree period, the valve is in a position in which it reverses the connections to the lines 11, 13, and the shuttle valve 19 and piston 28 are moved to the left. These two periods are 180 degrees apart, and at other times the valve part 5 closes the conduits 11, 13 allowing the shuttle valve 19 to centralize and connecting the two ends of the cylinder 2 by a passage 22, which contains a fluid pressure operated valve 25. The rotor blade thus pivots freely on the hinge 60. The lead-lag pivoting may be started and stopped gradually by moving the part 5 of the rotary valve axially to vary the alignment of the passages such as 8 with the conduits such as 11, 10 thus to vary the pressure in the servomotor and to vary the pressure on the valve 25. which when closed, damps the pivoting of the blade. The hydraulic servomotor may be replaced by an electric or pneumatic servomotor.
    • 5. 发明专利
    • Pivot drive for producing the lead lag movement of the rotor blade of rotary wing aircraft
    • GB947683A
    • 1964-01-29
    • GB3205462
    • 1962-08-21
    • LUDWIG BOLKOW
    • MULLER MARTINDERSCHMIDT HANSSCHWARZ ALOIS
    • B64C27/635
    • 947,683. Rotary wing aircraft. L. BOLKOW, [trading as BOLKOW-ENTWICKLUNGEN KOM.-GES. Aug. 21, 1962, No. 32054/62. Headings B7G and B7W. The lead-lag angle of a rotary wing aircraft rotor blade is controlled by an hydraulic transmission. In the Figure, the rotor head comprises a disc 22c, and two parallel spiders 22a, 22b, supporting five blades 25 on drag pivots 24. Each blade is cyclically pivoted about its drag axis by a telemotor system comprising a slave cylinder 29 and a master cylinder 36 connected between disc 22c and the rotary element 42 of a swash plate. Where there is an even number of blades, opposed slave cylinders are hydraulically connected to each other and to a master cylinder, one for each pair of slave cylinders. The rotary member of the swash plate may consist solely of arms, one for each master cylinder, each pivoted to the rotor shaft at one end and having at the other end a roller received in a groove in a non- rotary inclinable ring. The master cylinder can then be secured to the rotor shaft, and communicate with the slave cylinders through bores in the shaft and flexible pipes. The slave cylinders contain longitudinal grooves on their inner walls, or other restricted by-pass ducts, the flow through which tends to cause the piston path to be symmetrically located longitudinally of the cylinder (see Figs. 5-12 (not shown).