KR890008430A - Closed movement control method of hydraulically operated exhaust valve of marine diesel engine and exhaust valve used in the method - Google Patents

Abstract

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Description

Closed movement control method of hydraulically operated exhaust valve of marine diesel engine and exhaust valve used in the method

Since this is an open matter, no full text was included.

Fig. 1 is a schematic partial through cross-sectional view of a hydraulically actuated exhaust valve according to the present invention with an actuating device coupled to it.

2 is an enlarged cross-sectional view of the upper part of the exhaust valve of FIG.

3 is a diagram of an opening characteristic of the exhaust valve shown in FIG.

Claims (5)

In combustion engines, in particular in two-stroke uniflow exhaust diesel engines for ships, an actuator plunger accommodated in the oil cylinder 4 to interact with the valve member 5 and openly open it in the pressurized hydraulic oil supply. A closed movement control method of a hydraulically actuated exhaust valve (1) comprising (10) and wherein the plunger forms an operating chamber of hydraulic oil, wherein the volume flow rate of oil discharged from the operating chamber of the exhaust valve is controlled by the actuator plunger (10). And at least one mechanically defined stop throttle end between the cylinder and the cylinder (4) or by an adjustable throttle member, characterized in that it is varied according to the load condition of the engine. An actuator plunger 10 which interacts with the exhaust valve member 5 to openly move the member upon supply of pressurized pressure oil contained in the oil cylinder 4, the plunger being the operating chamber 21 of the hydraulic oil. Throttle edges (25, 26) in which the part of the cylinder (4) forming the working chamber is separated in two axial directions, in the exhaust valve used in the method according to claim 1, in the form of (27, 35). And the side of the actuator plunger 10 forming the operating chamber is terminated with axially separated depotling portions 16, 17, 18 interacting with the throttle edges 25, 26 of the cylinder 4. In the form of an axially extending stud 15 of varying diameter in the direction, the throttle edges 25, 26 of the cylinder 4 and the throttling portions 16, 17, 18 of the actuator plunger 10. The actuator plunger 10 if the position occupies a position corresponding to a sufficiently open exhaust valve. Of the cylinder 4 when the main throttling portion 16 remote from it interacts with the main throttle edge 25 of the cylinder 4 and the actuator plunger 10 occupies a position corresponding to the closed exhaust valve. Part of the operating chamber 27 which is adapted to interact with the secondary throttling portion 18 and is remote from the actuator plunger 10 and formed by the interaction between the main throttling portion 16 and the main throttle edge 25. Directly connected to this oil outlet 23, the portion of the operating chamber 27 located between the main throttle edge 25 and the sub throttle edge 26 of the cylinder is a duct 28 comprising an adjustable throttle valve 29. Exhaust valve, characterized in that connected to the oil outlet (23). An actuator plunger 50 which interacts with the exhaust valve member 5 to openly move the member upon supply of pressurized hydraulic oil contained in the oil cylinder 4, the plunger being the operating chamber 51 of the hydraulic oil. 52, and in an exhaust valve for use in the method according to claim 1, the actuator plunger 50 is provided with an axial cavity 51 constituting one bar of the operating chamber on the side forming the operating chamber. The cylinder 4 is provided with a cylindrical stud 56 which engages closely with the cavity 51 during the predetermined partial movement of the actuator plunger 50, the stud 56 having an adjustable throttle valve 58. Having a throttle duct 57, wherein the throttle duct 57 reaches an end face of the stud toward the actuator plunger at one side of the throttle valve 58, the throttle duct 57 being the throttle valve 58. End of the stud on the other side of the An opening 60 is reached in the cylindrical surface of the stud 56 at a predetermined axial distance from the face, the axial distance being exhausted with the opening 60 of the throttle duct 57 in the cylindrical surface of the stud 56 closed. An exhaust valve, characterized in that it is adapted to the movement of the actuator plunger 50 to be sealed by a plunger 50 occupying a position corresponding to the valve. 4. The actuator plunger according to claim 3, wherein the distance between the opening 60 of the throttle duct 57 of the cylindrical surface of the stud and the end face of the stud is such that the opening is not blocked by the plunger at any time during the movement of the actuator plunger 50. An exhaust valve, which is adapted to movement of 50. 5. The plunger 50 according to claim 3 or 4 only closely engages the stud 56 with an annular portion 52 positioned adjacent the orifice of the hole 51 and having a smaller diameter than the hole 51 itself. Exhaust valve characterized in that it is configured to. ※ Note: The disclosure is based on the initial application.