Exhaust valve control actuation system directly driven by servo oil
An executive system and exhaust valve technology, applied to non-mechanically actuated valves, valve devices, engine components, etc., can solve the problems that the valve stem stroke cannot reach the predetermined value, affect the performance and emission of the diesel engine, and fail, etc., to achieve The effect of reducing pressure drop, increasing service life, and reducing processing and manufacturing costs
Active Publication Date: 2022-07-15
HUDONG HEAVY MACHINERY +1
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Problems solved by technology
Due to different working conditions, errors in processing and assembly, inconsistencies in cylinder oil replenishment and leakage, or accidental conditions of parts during each action, the above-mentioned system will cause the valve stem stroke to fail to reach the predetermined value or even fail, which will seriously affect Diesel Engine Performance and Emissions
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[0026] The exhaust valve control execution system directly driven by servo oil according to the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, but this should not limit the protection scope of the present invention.
[0027] see figure 1 , the figure shows that the exhaust valve control execution system directly driven by the servo oil is installed on the exhaust valve, the exhaust valve includes a valve stem 1, a valve seat 2 and a valve shell 3; the exhaust valve control execution system includes a The high-pressure common rail pipe 14 that delivers the servo oil, the drive execution unit and the air spring assembly 5.
[0028] The air spring assembly 5 is fixed on the top of the valve housing 3 of the exhaust valve, and is connected with the valve stem 1 , and a single damping valve 4 is provided at the lower part of the air spring assembly 5 .
[0029] The drive execution unit is fixed on t...
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An exhaust valve control and execution system directly driven by servo oil is installed on an exhaust valve including a valve stem and a valve housing, and includes a high-pressure common rail pipe, a drive execution unit and an air spring assembly; wherein, the air spring assembly is fixed on the The top of the valve housing is connected with the valve stem; the drive execution unit is fixed on the top of the air spring assembly and directly connected to the high-pressure common rail pipe, including the solenoid valve, drive unit housing, large piston, small piston, mechanical spring assembly and one-way valve , the solenoid valve is connected to the high-pressure common rail pipe, the drive unit housing is provided with an upper orifice and a lower orifice, the one-way valve is connected to the lower orifice and is connected to the high-pressure common rail pipe, a mechanical spring assembly, a large piston The small piston and the small piston are arranged in the drive unit housing, and the small piston is pressed against the upper end of the valve stem; the drive execution unit directly controls and drives the valve stem to move up and down to open and close the exhaust valve by using the high-pressure servo oil in the high-pressure common rail pipe. . The invention adopts direct drive to realize the control of the valve stem, with less error, simple structure, low cost, long service life and small impact.
Description
technical field [0001] The invention relates to an electro-hydraulic drive control system for an exhaust valve of a marine high-power low-speed diesel engine, in particular to an exhaust valve control execution system directly driven by servo oil, and belongs to the technical field of diesel engines. Background technique [0002] The exhaust valve of marine low-speed diesel engine and its control driving system are one of the core components of diesel engine, and its driving characteristics will directly affect the economy and emission performance of the engine. At present, the electro-hydraulic drive control systems for exhaust valves widely used in the market are all based on the principle of indirect drive, that is, the pressurized chamber of the execution unit is filled with servo oil in the form of high pressure or low pressure through the orifice or check valve. When the exhaust valve needs to be opened, the control unit sends a command to control the solenoid valve to...
Claims
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IPC IPC(8): F01L9/10F01L9/40
CPCF01L9/10
Inventor 杨丽文李明张全富张强
Owner HUDONG HEAVY MACHINERY