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Valve rotating mechanism for exhaust valves, especially for marine diesel engines

A technology for marine engines and rotating devices, applied in valve devices, engine components, machines/engines, etc., can solve the problems of wear and tear of ball grooves, and achieve the effects of low temperature, long service life, and good heat conduction

Inactive Publication Date: 2010-12-29
MARKISCHES WERK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the known device it is possible to achieve relatively high valve stem speeds during the closing process; however, a certain amount of wear of the ball grooves should be expected at the same time, which means that regular replacement of the relevant cylinder section must be taken into account

Method used

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  • Valve rotating mechanism for exhaust valves, especially for marine diesel engines
  • Valve rotating mechanism for exhaust valves, especially for marine diesel engines
  • Valve rotating mechanism for exhaust valves, especially for marine diesel engines

Examples

Experimental program
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Embodiment Construction

[0029] figure 1 Shows the (gas) valve housing of a two-stroke diesel engine for marine propulsion and the valve stem 1 housed in it in its closed position. The rod 3 of the valve stem 1 is mounted rotatably inside the bushing 4 in the valve housing 2 , and the compressed air cylinder 5 is located on the valve housing 1 and the hydraulic cylinder 6 is located on the compressed air cylinder. The hydraulic cylinder 6 is separately shown in the same cutaway diagram figure 2 middle. On the underside of the valve housing 2 , a housing-side valve seat ring 7 is inserted into the valve housing and fixed there by means of screws 8 . The seat ring 7 forms, with its open end, the seat surface on the housing side, which is formed by a material section 9 that has been pretreated, for example hardened, or welded as hard metal, and which corresponds to the upper side of the valve disk 11. The valve mating surface 10 (valve taper fit) of the valve works together.

[0030] In an annular g...

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PUM

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Abstract

The invention relates to a valve rotating mechanism for exhaust valves, especially for marine diesel engines, which is supported in a valve housing for the valve stem between an upper and a lower drive element. Said valve rotating mechanism is linked with the lower drive element via a free-wheel device that transmits a rotation of the valve stem during the closing movement. The mechanism is also supported in relation to the upper drive element via a rotation cylinder which, when engaged with a stationary support cylinder, brings about the rotation of the valve stem. The rotation cylinder and the support cylinder engage with each other by means of a helical gearing, the rotation cylinder being linked with the valve stemvia the free-wheel device and the support cylinder being fastened on the housing.

Description

technical field [0001] The invention relates to a valve rotation device for an exhaust valve of a marine engine, which is supported in a valve housing for a valve stem between an upper and a lower drive member, where it is connected to the valve via a free wheel arrangement The lower drive is connected, the free wheel device transmits the rotation of the valve stem during the closing movement of the valve stem, moreover, said valve rotation device is supported on the upper drive by a rotating cylinder, which is connected to a fixed support Cylinder engagement causes the stem to rotate. Background technique [0002] Such a valve rotation device is described in German patent document 3113944. This known device comprises two cylinder sections that are arranged concentrically with each other, some balls are guided between them with rotational movement in such a way, that is, the balls engage respectively in the ball sockets of one of the cylinder sections and the other. Inside...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/32F01L9/02F01L3/08F01L3/10F01L9/10
CPCF01L9/02F01L1/32F01L9/10
Inventor 霍尔格·费尔曼
Owner MARKISCHES WERK