Dynamic control system and dynamic calculation method for lubricating oil flow of ship engine cylinder

Abstract

The invention relates to the technical field of ship lubricating oil dynamic calculation, in particular to a ship engine air cylinder lubricating oil flow dynamic control system and a ship engine air cylinder lubricating oil flow dynamic calculation method.The system comprises a data acquisition module, a calculation processing module and a flow control module, the calculation processing module is connected with the flow control module, the data acquisition module is a module for acquiring operation parameters of an engine, the acquired operation parameters of the engine are transmitted to the calculation processing module, and the calculation processing module dynamically calculates and processes data to obtain the flow of required lubricating oil. The lubricating oil flow control system has the advantages that the system is simple, the method is simple and convenient, the use amount of the lubricating oil in the air cylinder is accurately controlled, the lubricating efficiency is improved, the operation cost is reduced, the environmental pollution is reduced, and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamic calculation of ship lubricating oil, and in particular to a dynamic control system and a dynamic calculation method for the flow rate of cylinder lubricating oil of a ship engine, which has a simple system, a simple method, and can accurately control the amount of cylinder lubricating oil, improve lubrication efficiency, reduce operating costs, and reduce environmental pollution. Background Art

[0002] As we all know, traditional ship engine cylinder lubrication systems usually use a fixed supply rate or a simple linear adjustment method, which cannot accurately adapt to the lubrication needs of the engine under different operating conditions. This leads to waste or insufficient supply of lubricating oil, affecting engine performance and life, while increasing operating costs and environmental pollution. Therefore, there is an urgent need for a method and system that can dynamically adjust the cylinder lubricating oil supply according to the actual operating conditions of the engine. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a dynamic control system and a dynamic calculation method for the cylinder lubricating oil flow of a ship engine, which has a simple system, a simple method, and can accurately control the amount of cylinder lubricating oil, improve lubrication efficiency, reduce operating costs, and reduce environmental pollution.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A dynamic control system for the lubricating oil flow rate of a ship engine cylinder, characterized in that the system comprises a data acquisition module, a calculation processing module, and a flow control module, wherein the data acquisition module is connected to the calculation processing module, and the calculation processing module is connected to the flow control module, wherein the data acquisition module is a module for collecting engine operating parameters, and the collected engine operating parameters are transmitted to the calculation processing module, and the calculation processing module performs dynamic calculation processing on the data to obtain the required lubricating oil flow rate, and the result of the lubricating oil flow rate obtained by the calculation processing module is transmitted to the flow control module, and the flow control module outputs the lubricating oil flow rate obtained by the calculation processing module.

[0005] The system described in the present invention comprises a display module, which is connected to the calculation and processing module, and is a module for displaying the result of the lubricating oil flow obtained by the calculation module.

[0006] The data collected by the data acquisition module of the present invention include the maximum marked power of the ship engine, the current load of the engine, the sulfur content of the fuel, the ambient temperature, the lubricating oil temperature, the engine running hours, and the ACC (Alpha AdaptiveCylinder oil Control) value.

[0007] The flow control module of the present invention comprises a lubricating oil pump and a regulating flow control valve. The output end of the lubricating oil pump is connected to the regulating flow control valve. The flow regulating control valve controls the opening and thus controls the flow of the lubricating oil output by the lubricating oil pump.

[0008] A dynamic calculation method for lubricating oil flow rate of a ship engine cylinder, characterized in that the steps of the dynamic calculation method are as follows: (1) Collect engine operating parameters; (2) Calculate the dynamic supply rate; (3) Calculate actual power; (4) Calculate the wear factor; (5) Calculate the actual density; (6) Calculate the cylinder lubricating oil flow rate based on the above parameters.

[0009] In step (1) of the present invention, the engine operating parameters are collected: the maximum marked power of the ship engine, the current load of the engine, the sulfur content of the fuel, the ambient temperature, the lubricating oil temperature, the engine running hours, and the ACC (Alpha AdaptiveCylinder oil Control) value.

[0010] The dynamic supply rate is calculated in step (2) of the present invention as follows: dynamic supply rate = max(0.6, ACC × S% × load factor × temperature factor), wherein the value range of ACC (Alpha Adaptive Cylinder oil Control) is 0.2 - 0.4, S% is the percentage of sulfur content in the fuel, load factor = 1 + (current load% -75%) × 0.005, and temperature factor = 1 + (ambient temperature - 25) × 0.002.

[0011] The actual power is calculated in step (3) of the present invention as follows: actual power = PowerSMCR × current load % × efficiency factor, wherein PowerSMCR is the maximum marked power of the ship engine, current load % reflects the actual operating state of the engine, and efficiency factor = 1 - (engine operating hours / 100000) × 0.05.

[0012] The wear factor calculated in step (4) of the present invention is specifically: wear factor = 1 + (engine running hours / 10000) × 0.05.

[0013] The actual density is calculated in step (5) of the present invention as follows: actual density = 900 × (1 - 0.0007 × (oil temperature - 25)).

[0014] In step (6) of the present invention, the cylinder lubricating oil flow rate is calculated based on the above parameters as follows: flow rate [m³ / h] = (dynamic supply rate × actual power × 1.2 × wear factor) / (1000 × actual density).

[0015] Due to the adoption of the above structure, the present invention has the advantages of simple system, simple method, precise control of cylinder lubricating oil dosage, improved lubrication efficiency, reduced operating cost, reduced environmental pollution, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure numerals: data acquisition module 1, calculation and processing module 2, flow control module 3, display module 4. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings: As shown in the accompanying drawings, a dynamic control system for the lubricating oil flow rate of a ship engine cylinder is characterized in that the system includes a data acquisition module 1, a calculation and processing module 2, and a flow control module 3. The data acquisition module 1 is connected to the calculation and processing module 2, and the calculation and processing module 2 is connected to the flow control module 3. The data acquisition module 1 is a module for collecting engine operating parameters, and the collected engine operating parameters are transmitted to the calculation and processing module 2. The calculation and processing module 2 dynamically calculates and processes the data to obtain the required lubricating oil flow rate, and the result of the lubricating oil flow rate obtained by the calculation and processing module 2 is transmitted to the flow control module 3, and the flow control module 3 outputs the lubricating oil flow rate obtained by the calculation and processing module 2.

[0019] Furthermore, the system includes a display module 4, which is connected to the calculation and processing module 2. The display module 4 is a module for displaying the result of the lubricating oil flow obtained by the calculation module. The display module 4 displays the current lubricating oil flow, engine load, fuel sulfur content, lubricating oil consumption rate, system operating status and alarm information.

[0020] Furthermore, the data collected by the data collection module 1 include the maximum marked power of the ship engine, the current load of the engine, the sulfur content of the fuel, the ambient temperature, the lubricating oil temperature, the engine running hours, and the ACC (Alpha AdaptiveCylinder oil Control) value.

[0021] Furthermore, the flow control module 3 includes a lubricating oil pump and a regulating flow control valve. The output end of the lubricating oil pump is connected to the regulating flow control valve. The flow regulating control valve controls the opening and thus controls the flow of the lubricating oil output by the lubricating oil pump.

[0022] A dynamic calculation method for lubricating oil flow rate of a ship engine cylinder, characterized in that the steps of the dynamic calculation method are as follows: (1) Collect engine operating parameters; (2) Calculate the dynamic supply rate; (3) Calculate actual power; (4) Calculate the wear factor; (5) Calculate the actual density; (6) Calculate the cylinder lubricating oil flow rate based on the above parameters.

[0023] Furthermore, in the step (1), the engine operating parameters are collected: the maximum marked power of the ship engine, the current load of the engine, the sulfur content of the fuel, the ambient temperature, the lubricating oil temperature, the engine running hours, and the ACC (AlphaAdaptive Cylinder oil Control) value.

[0024] Furthermore, the dynamic supply rate is calculated in step (2) as follows: dynamic supply rate = max(0.6, ACC × S% × load factor × temperature factor), wherein the value range of ACC (Alpha Adaptive Cylinder oil Control) is 0.2 - 0.4, S% is the sulfur content percentage in the fuel, load factor = 1 + (current load% -75%) × 0.005, and temperature factor = 1 + (ambient temperature - 25) × 0.002.

[0025] The above ACC (Alpha Adaptive Cylinder oil Control): has a value range of 0.2 - 0.4, and a default value of 0.4. This range is based on the recommendations of MAN Energy Solutions and reflects the optimal control coefficient for different engine designs and operating conditions. S%: The percentage of sulfur content in the fuel. According to the regulations of the International Maritime Organization (IMO), the sulfur content of the fuel is usually between 0.1% and 3.5%. The load factor takes into account the effect of the engine load on the lubrication demand. 75% was selected as the reference point because it is generally considered to be the optimal operating load of the engine. The temperature factor reflects the effect of ambient temperature on the performance of the lubricant. 25°C was selected as the reference temperature because it is a common standard ambient temperature. The minimum value of 0.6 g / kWh in the dynamic supply rate formula is based on the minimum supply rate of the standard model to ensure sufficient lubrication under any circumstances.

[0026] Furthermore, the actual power is calculated in step (3) as follows: actual power = PowerSMCR × current load % × efficiency factor, wherein PowerSMCR is the maximum marked power of the ship engine, current load % reflects the actual operating status of the engine, and efficiency factor = 1 - (engine operating hours / 100000) × 0.05.

[0027] The actual power takes into account the current load and efficiency decay of the engine. PowerSMCR is the power of the engine at the specified maximum continuous power (SMCR), which is the reference power for engine design. The current load % is usually between 20% - 100%. The efficiency factor reflects the trend of engine efficiency decreasing with increasing usage time. 100,000 hours in the efficiency factor formula is selected as the reference value because this is usually close to the overhaul cycle of large ship engines.

[0028] Furthermore, the wear factor calculated in step (4) is specifically: wear factor = 1 + (engine running hours / 10000) × 0.05.

[0029] The wear factor reflects the effect of engine usage time on lubrication requirements. The formula is: the wear factor of a new engine is 1, and the lubrication requirement increases by 5% for every 10,000 hours of operation. This ratio is estimated based on industry experience and engine wear curves. 10,000 hours is selected as a cycle because it generally corresponds to the medium maintenance interval of the engine.

[0030] Furthermore, the actual density is calculated in step (5) as follows: actual density = 900 × (1 - 0.0007 × (oil temperature - 25)).

[0031] The actual density takes into account the effect of temperature on the density of the lubricant. The 900 in the formula is the standard density in kg / m³. 0.0007 is the estimated coefficient of thermal expansion, which is based on the characteristics of typical marine lubricants. 25 is selected as the reference temperature in °C. This formula reflects the characteristic that the density of the lubricant decreases with increasing temperature, which affects the final volume flow rate.

[0032] Furthermore, in step (6), the cylinder lubricating oil flow rate is calculated based on the above parameters as follows: flow rate [m³ / h] = (dynamic supply rate × actual power × 1.2 × wear factor) / (1000 × actual density).

[0033] In the above formula, dynamic supply rate [g / kWh]: calculated by step (2), actual power [kW]: calculated by step (3), wear factor: calculated by step (4), actual density [kg / m³]: calculated by step (5), 1.2 in the formula is a safety factor to ensure that there is sufficient lubricating oil supply under various operating conditions, and 1000 in the formula is used for unit conversion, converting g to kg.

[0034] Workflow: 1. After the system is started, the data acquisition module 1 starts to continuously collect engine operating parameters. 2. The collected data is transmitted to the calculation and processing module 2 in real time. 3. The calculation and processing module 2 calculates the required lubricating oil flow rate according to the preset algorithm. 4. The calculation result is transmitted to the flow control module 3 to adjust the lubricating oil supply. 5. At the same time, the calculation result and system status information are transmitted to the display module 4 for operator monitoring. 6. The system continues to run and adjusts the lubricating oil supply in real time to adapt to the different operating conditions of the engine. This solution can not only achieve precise lubricating oil control, but also improve the reliability and operational convenience of the system, thereby optimizing the operating efficiency and life of the entire engine.

[0035] Compared with the traditional fixed supply rate method, this method can more accurately control the amount of lubricating oil, avoiding waste and pollution caused by excessive lubrication and equipment damage caused by insufficient lubrication, thereby optimizing the operating efficiency and life of the engine. Due to the adoption of the above structure, the present invention has the advantages of simple system, simple method, accurate control of cylinder lubricating oil dosage, improved lubrication efficiency, reduced operating costs, and reduced environmental pollution.

[0036] The steps of the dynamic calculation method are as follows: Example 1: Calculation under standard conditions (1) Collect engine operating parameters; the ship's main engine parameters are as follows: PowerSMCR = 20,000 kW, current load = 80%, fuel sulfur content = 0.5%, ambient temperature = 30°C, oil temperature = 40°C, engine operating time = 5000 hours, ACC = 0.3; (2) Calculate the dynamic supply rate; load factor = 1 + (80% - 75%) × 0.005 = 1.025, temperature factor = 1 + (30 - 25) × 0.002 = 1.01, dynamic supply rate = max(0.6, 0.3 × 0.5% × 1.025× 1.01) = 0.6 g / kWh; (3) Calculate the actual power; efficiency factor = 1 - (5000 / 100000) × 0.05 = 0.9975, actual power = 20,000 × 80% × 0.9975 = 15,960 kW; (4) Calculate the wear factor; wear factor = 1 + (5000 / 10000) × 0.05 = 1.025; (5) Calculate the actual density; Actual density = 900 × (1 - 0.0007 × (40 - 25)) = 889.425 kg / m³ (6) Calculate the cylinder lubricating oil flow rate based on the above parameters: flow rate = (0.6 × 15,960 × 1.2 ×1.025) / (1000 × 889.425) = 0.013953 m³ / h = 13.953 L / h.

[0037] Example 2: Calculation under extreme conditions (1) Collecting engine operating parameters, the same engine as in Example 1 is operated under the following extreme conditions: the main engine parameters of the ship are as follows: PowerSMCR = 20,000 kW, current load = 100%, fuel sulfur content = 3.5%, ambient temperature = 45°C, oil temperature = 60°C, engine operating time = 50,000 hours, ACC = 0.3 (consistent with Example 1); (2) Calculate the dynamic supply rate; load factor = 1 + (100% - 75%) × 0.005 = 1.125, temperature factor = 1 + (45 - 25) × 0.002 = 1.04, dynamic supply rate = max(0.6, 0.3 × 3.5% × 1.125× 1.04) = 1.3860 g / kWh; (3) Calculate the actual power; efficiency factor = 1 - (50000 / 100000) × 0.05 = 0.975, actual power = 20,000 × 100% × 0.975 = 19,500 kW; (4) Calculate the wear factor; wear factor = 1 + (50000 / 10000) × 0.05 = 1.25, (5) Calculate the actual density; actual density = 900 × (1 - 0.0007 × (60 - 25)) = 882.675 kg / m³; (6) Calculate the cylinder lubricating oil flow rate based on the above parameters: Flow rate = (1.3860 × 19,500 × 1.2 ×1.25) / (1000 × 882.675) = 0.046165 m³ / h = 46.165 L / h.

[0038] Result analysis: 1. Under standard working conditions (Example 1), the consumption of cylinder lubricating oil is 13.953 L / h.

[0039] 2. Under extreme working conditions (Example 2), the consumption of cylinder lubricating oil increases to 46.165 L / h.

[0040] These two examples clearly demonstrate the adaptability and dynamics of the method of the present invention: 1. Effect of fuel sulfur content: In Example 2, the fuel sulfur content was significantly increased (from 0.5% to 3.5%), resulting in a significant increase in the dynamic supply rate, which reflects the higher demand for cylinder lubrication by high sulfur fuel.

[0041] 2. Influence of load: In Example 2, the engine is operated at full load, which not only directly increases the actual power but also improves the dynamic supply rate through the load factor.

[0042] 3. Effect of temperature: In Example 2, higher ambient temperature and oil temperature affect the dynamic supply rate and actual density, but the impact is relatively small.

[0043] 4. Effect of Engine Running Time: In Example 2, long-term operation (50,000 hours) resulted in a decrease in the efficiency factor and an increase in the wear factor, which reflects the effect of engine aging on lubrication requirements.

[0044] 5. Dynamic adjustment capability: This method can automatically adjust the lubricating oil supply according to the changes in various parameters. Under extreme working conditions (Example 2), the supply amount is increased by about 3.3 times, ensuring sufficient lubrication.

[0045] 6. Precise control: Even under standard operating conditions, the method can accurately calculate the required flow rate according to the actual situation to avoid over-lubrication or under-lubrication. The two embodiments prove that the method of the present invention can effectively cope with different operating conditions and optimize the use of cylinder lubricating oil, which can ensure that the engine is fully protected under extreme conditions and avoid unnecessary waste under normal conditions, thereby improving the operating efficiency and life of the engine, while reducing operating costs and environmental impact.

[0046] 7. Industrial Applicability: The present invention can be widely used in lubrication systems of various types of ship engines, especially large ocean-going ships and ships that frequently change routes. By integrating with the existing engine control system, automatic control can be achieved to improve the overall operational efficiency of the ship. Therefore, the present invention provides a dynamic control system and dynamic calculation method for the flow rate of lubricating oil in the cylinder of a ship engine that comprehensively considers various influencing factors, which can significantly improve the lubrication efficiency and reliability of the ship engine, and has important economic value and environmental benefits.

Claims

1. A dynamic control system for the flow rate of lubricating oil in the cylinder of a ship engine, characterized in that The system includes a data acquisition module, a calculation and processing module, and a flow control module. The data acquisition module is connected to the calculation and processing module, and the calculation and processing module is connected to the flow control module. The data acquisition module is a module for collecting engine operating parameters. The collected engine operating parameters are transmitted to the calculation and processing module. The calculation and processing module dynamically calculates and processes the data to obtain the required lubricating oil flow. The result of the lubricating oil flow obtained by the calculation and processing module is transmitted to the flow control module, and the flow control module outputs the lubricating oil flow obtained by the calculation and processing module.

2. A dynamic control system for lubricating oil flow rate of a ship engine cylinder according to claim 1, characterized in that The data collected by the data acquisition module include the maximum marked power of the ship engine, the current load of the engine, the sulfur content of the fuel, the ambient temperature, the lubricating oil temperature, the engine running hours, and the ACC value.

3. A dynamic control system for lubricating oil flow rate of a ship engine cylinder according to claim 1, characterized in that The flow control module comprises a lubricating oil pump and a regulating flow control valve. The output end of the lubricating oil pump is connected to the regulating flow control valve. The flow regulating control valve controls the opening degree and thus controls the flow of the lubricating oil output by the lubricating oil pump.

4. A dynamic calculation method for the lubricating oil flow rate of a ship engine cylinder, characterized in that The steps of the dynamic calculation method are as follows: (1) Collect engine operating parameters; (2) Calculate the dynamic supply rate; (3) Calculate actual power; (4) Calculate the wear factor; (5) Calculate the actual density; (6) Calculate the cylinder lubricating oil flow rate based on the above parameters.

5. A method for dynamically calculating the flow rate of lubricating oil in a ship engine cylinder according to claim 4, characterized in that In the step (1), the engine operating parameters are collected: the maximum marked power of the ship engine, the current load of the engine, the sulfur content of the fuel, the ambient temperature, the lubricating oil temperature, the engine running hours, and the ACC value.

6. A method for dynamically calculating the flow rate of lubricating oil in a ship engine cylinder according to claim 4, characterized in that The dynamic supply rate is calculated in step (2) as follows: dynamic supply rate = max(0.6, ACC × S% × load factor × temperature factor), where ACC is in the range of 0.2 - 0.4, S% is the sulfur content in the fuel, load factor = 1 + (current load% - 75%) × 0.005, and temperature factor = 1 + (ambient temperature - 25) × 0.

002.

7. A method for dynamically calculating the flow rate of lubricating oil in a ship engine cylinder according to claim 4, characterized in that The actual power is calculated in step (3) as follows: actual power = PowerSMCR × current load % × efficiency factor, where PowerSMCR is the maximum marked power of the ship engine, current load % reflects the actual operating status of the engine, and efficiency factor = 1 - (engine operating hours / 100000) × 0.

05.

8. A method for dynamically calculating the flow rate of lubricating oil in a ship engine cylinder according to claim 4, characterized in that The wear factor calculated in step (4) is specifically: wear factor = 1 + (engine running hours / 10000) × 0.

05.

9. A method for dynamically calculating the flow rate of lubricating oil in a ship engine cylinder according to claim 4, characterized in that The actual density is calculated in step (5) as follows: actual density = 900 × (1 - 0.0007 × (oil temperature - 25)).

10. A method for dynamically calculating the flow rate of lubricating oil in a ship engine cylinder according to claim 4, characterized in that In step (6), the cylinder lubricating oil flow rate is calculated based on the above parameters as follows: flow rate [m³ / h] = (dynamic supply rate × actual power × 1.2 × wear factor) / (1000 × actual density).

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