| 摘要 |
478,683. Balancing engines. SARAZIN, R. R. R. July 24, 1936, No. 20593. Convention date, June 9. [Class 122 (iii)] Radial-cylinder engines having a connecting- rod system of the master and articulated - rod type and which are subject to vibratory couples, are balanced by mounting in the engine casing masses which are oscillated or rotated to produce in a plane perpendicular to the engine crank-shaft a torque which is zero when the master piston is at its dead centre positions and which has two oppositelydirected maxima for each complete revolution' of the crank-shaft. The counterbalance device 2 is pivoted on the casing 1 on an axis parallel to the engine shaft. The device is oscillated by a link 3 connected to a crank 4 on a shaft 5 which is driven at a speed equal to that of the engine shaft. In the construction shown in Fig. 2, oppositely-disposed masses 8 are arranged on oppositely-rotating shafts 6 on each side of the engine, arranged parallel to the plane of the couple to be balanced. In the construction shown in Fig. 4, oppositelydisposed masses 11 are arranged on axes 9, 10 rotating in the same direction as the main shaft, and at right-angles to the plane of the couple to be balanced. The shafts 9, 10 are preferably driven by the mechanism driving the distribution cam. A toothed wheel on the engine shaft drives intermediate pinions 14 rotating about axes 15 which operate the cam. The pinions 14 operate toothed wheels 18 on the shafts 9, 10. In radial cylinder engines with two groups of cylinders, the shafts 9, 10 can be provided on one or both sides of the engine. |
