A marine methanol main engine seal oil unit

Abstract

The utility model discloses a kind of methanol main engine sealing oil units for ship, including sealing oil tank, electric oil pump, filter, oil supply valve group, pressure regulating valve group, pressure accumulator valve block and ventilation system;Oil supply valve group is given sealing oil tank oil supplement by electromagnetic valve group on-off electricity;Electric oil pump is connected with sealing oil tank, and it is extracted from sealing oil tank to pressure regulating valve group after hydraulic oil is filtered by filter;Pressure regulating valve group side is connected with pressure accumulator valve block, and the pressure accumulator valve block is used to keep pressure;Pressure regulating valve group other side is connected high-pressure sealing oil path and low-pressure sealing oil path;High-pressure sealing oil path and low-pressure sealing oil path respectively supply methanol injection valve FBIV-M oil pressure seal and window valve ELBI oil pressure seal.The design provides "zero leakage, high stability, low energy consumption" sealing solution for methanol main engine by the combination of precision hydraulic control and intelligent monitoring, and it is called the key technology breakthrough of clean energy ship power system.

Description

Technical Field

[0001] This utility model relates to a marine methanol main engine sealing oil unit, belonging to the technical field of marine main engine equipment. Background Technology

[0002] With increasingly stringent emission requirements from the International Maritime Organization (IMO), methanol is becoming increasingly popular as a clean fuel in marine main engines. Compared to traditional heavy fuel oil, methanol combustion produces only small amounts of carbon dioxide and water, and emits almost no sulfur oxides (SOx) or particulate matter (PM). However, it is highly volatile and toxic, and leaks can endanger crew safety and corrode equipment. Currently, methanol main engine seals rely heavily on conventional hydraulic systems, which suffer from problems such as large pressure fluctuations, easy mixing of sealing oil with methanol leading to decreased combustion efficiency, and nozzle calcification and clogging. Furthermore, traditional systems lack closed-loop control over sealing oil temperature, concentration, and leakage risk, making it difficult to meet the high safety and environmental standards required for methanol main engines. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a marine methanol main engine sealing oil unit, thereby solving the aforementioned technical problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a marine methanol main engine sealing oil unit, comprising a sealing oil tank, an electric oil pump, a filter, an oil supply valve group, a pressure regulating valve group, an accumulator valve block, and a ventilation system; the oil supply valve group supplies oil to the sealing oil tank by switching the power on and off via a solenoid valve group; the electric oil pump is connected to the sealing oil tank, and draws hydraulic oil from the sealing oil tank, filters it through the filter, and then supplies it to the pressure regulating valve group; an accumulator valve block is connected to one side of the pressure regulating valve group, which is used to maintain the pressure; the other side of the pressure regulating valve group is connected to a high-pressure sealing oil circuit and a low-pressure sealing oil circuit; the high-pressure sealing oil circuit and the low-pressure sealing oil circuit respectively supply hydraulic seals to the methanol injection valve FBIV-M and the window valve ELBI.

[0005] Furthermore, the sealed oil tank is equipped with multiple liquid level sensors, which can detect high and low liquid levels. The control system receives the sensor signals and determines whether to perform oil replenishment or oil overflow alarm operations.

[0006] Furthermore, the ventilation system is located above the sealed oil tank and is used to evaporate and vaporize the methanol mixed in the sealing oil and discharge it.

[0007] Furthermore, it also includes a methanol concentration sensor; the methanol concentration sensor is installed in the ventilation system and is used to detect the methanol concentration in real time, and to alarm or switch to fuel mode when the concentration exceeds the limit.

[0008] Furthermore, it also includes a venting circuit, which is located between the sealing oil tank and the pressure regulating valve assembly, and is used to reduce the consumption of sealing oil.

[0009] Furthermore, the pressure regulating valve group is equipped with an electromagnetic reversing valve and a throttle valve, which together with the temperature sensor constitute a constant temperature regulation module. When the temperature sensor detects that the temperature is lower than the set value, the control system controls the electromagnetic reversing valve and the throttle valve to regulate. The sealing oil circulates through the throttle valve. Under the throttling and friction of the throttle valve, the hydraulic oil generates heat and the temperature rises until it reaches the set value.

[0010] The beneficial effects of this utility model are: 1. Dual security protection: By employing independent high-pressure (40 bar) and low-pressure (16 bar) sealing circuits, the sealing requirements of the methanol injection valve (FBIV-M) and window valve (ELBI) are precisely matched, completely blocking methanol leakage paths. The ventilation system integrates a methanol concentration sensor, which automatically triggers an alarm or switches to fuel mode when the concentration exceeds the limit, avoiding toxicity risks.

[0011] 2. Energy efficiency optimization design: The venting circuit significantly reduces sealing oil consumption and minimizes the risk of nozzle calcification caused by sealing oil mixing into the combustion chamber. The thermostatic module, composed of a throttle valve and a solenoid directional valve, autonomously regulates oil temperature through frictional heat generation, eliminating the need for additional heating devices and achieving energy efficiency.

[0012] 3. Intelligent monitoring: The liquid level sensor is linked with the control system to achieve automatic oil replenishment and oil overflow warning; the temperature sensor ensures stable oil temperature and promotes methanol evaporation and discharge. The modular structure facilitates maintenance, and the accumulator valve block maintains stable pressure, reducing frequent start-stop of the electric oil pump and extending equipment life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the relevant structure of the pressure regulating valve assembly of this utility model.

[0014] In the diagram: 1. Sealed oil tank; 11. Liquid level sensor; 2. Electric oil pump; 3. Filter; 4. Oil supply valve assembly; 5. Pressure regulating valve assembly; 51. High-pressure sealing oil circuit; 52. Low-pressure sealing oil circuit; 53. Solenoid directional valve; 54. Throttle valve; 6. Accumulator valve block; 7. Ventilation system; 71. Methanol concentration sensor; 9. Temperature sensor; 8. Relief circuit; 9. Temperature sensor. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0017] like Figure 1 and Figure 2 As shown, a marine methanol main engine sealing oil unit includes a sealing oil tank 1, an electric oil pump 2, a filter 3, an oil supply valve group 4, a pressure regulating valve group 5, an accumulator valve block 6, and a ventilation system 7. The oil supply valve group 4 supplies oil to the sealing oil tank 1 by switching the power on and off via a solenoid valve group. The electric oil pump 2 is connected to the sealing oil tank 1 and draws hydraulic oil from the sealing oil tank 1, which is filtered by the filter 3 and then supplied to the pressure regulating valve group 5. The pressure regulating valve group 5 is connected to the accumulator valve block 6 on one side, which is used to maintain the pressure. The other side of the pressure regulating valve group 5 is connected to a high-pressure sealing oil circuit 51 and a low-pressure sealing oil circuit 52. The high-pressure sealing oil circuit 51 and the low-pressure sealing oil circuit 52 supply hydraulic seals for the methanol injection valve FBIV-M and the window valve ELBI, respectively.

[0018] In this embodiment, a plurality of liquid level sensors 11 are installed in the sealed oil tank 1. The liquid level sensors 11 can detect high and low liquid levels. The control system receives the sensor signals and determines whether to perform oil replenishment or oil overflow alarm operation.

[0019] In this embodiment, the ventilation system 7 is installed above the sealing oil tank 1, which is used to evaporate and vaporize the methanol mixed in the sealing oil and discharge it.

[0020] In this embodiment, a methanol concentration sensor 71 is also included; the methanol concentration sensor is installed in the ventilation system 7 and is used to detect the methanol concentration in real time, and to alarm or switch to fuel mode when the concentration exceeds the limit.

[0021] In this embodiment, a venting circuit 8 is also included. The venting circuit 8 is disposed between the sealing oil tank 1 and the pressure regulating valve group 5, and is used to reduce the consumption of sealing oil.

[0022] In this embodiment, the pressure regulating valve group 5 is equipped with an electromagnetic reversing valve 53 and a throttle valve 54, which together with the temperature sensor 9 constitute a constant temperature regulation module. When the temperature sensor detects that the temperature is lower than the set value, the control system controls the electromagnetic reversing valve 53 and the throttle valve 54 to regulate. The sealing oil circulates through the throttle valve 54. Under the throttling and friction of the throttle valve 54, the hydraulic oil generates heat and the temperature rises until it reaches the set value.

[0023] Working principle: Sealing oil supply and pressure regulation: Oil replenishment process: The level sensor 11 inside the sealed oil tank 1 monitors the oil level in real time. When the level is lower than the threshold, the control system activates the solenoid valve of the oil supply valve group 4 to replenish low-pressure hydraulic oil to the oil tank.

[0024] Pressurization and Stabilization: Electric oil pump 2 draws oil from the oil tank, purifies it through filter 3, and then delivers it to pressure regulating valve assembly 5. Accumulator valve block 6 absorbs pressure fluctuations to ensure a constant output oil pressure. Pressure regulating valve assembly 5 divides the oil circuit into two lines: a high-pressure line of 40 bar and a low-pressure line of 16 bar, which supply the FBIV-M and ELBI valves respectively.

[0025] Temperature control and methanol emissions: Temperature control mechanism: Temperature sensor 9 detects the oil temperature. If it is lower than the set value, the control system adjusts the solenoid directional valve 53, causing the sealing oil to flow through the throttle valve 54. During the throttling process, the oil generates heat through friction, and the temperature gradually rises to the set range.

[0026] Methanol removal: Methanol mixed with sealing oil is heated and vaporized in the oil tank and discharged through ventilation system 7. Methanol concentration sensor 71 monitors the exhaust concentration in real time, triggering an emergency response when the concentration exceeds the limit.

[0027] Safety and Energy Efficiency Management: Drainage circuit 8: Returns excess sealing oil to the oil tank, reducing system fuel consumption and mitigating the risk of combustion chamber contamination. Fault response: If any abnormal pressure or methanol leakage triggers an alarm, the system can automatically reduce speed or switch to fuel mode to ensure uninterrupted operation of the main unit.

[0028] Technical highlights of this solution: Closed-loop control: The entire process from fuel supply and pressure regulation to emissions is automated, forming a "detection-adjustment-feedback" closed loop. Environmental compatibility: It meets the green emission requirements of methanol fuel while eliminating its toxicity risks through sealing technology, perfectly balancing environmental protection and safety needs.

[0029] This design, through the combination of precision hydraulic control and intelligent monitoring, provides a sealing solution for methanol main engines that features "zero leakage, high stability, and low energy consumption," representing a key technological breakthrough in clean energy ship propulsion systems.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A marine methanol main engine sealing oil unit, characterized in that, The system includes a sealed oil tank (1), an electric oil pump (2), a filter (3), an oil supply valve group (4), a pressure regulating valve group (5), an accumulator valve block (6), and a ventilation system (7). The oil supply valve group (4) supplies oil to the sealed oil tank (1) by switching the power on and off through a solenoid valve group. The electric oil pump (2) is connected to the sealed oil tank (1) and draws hydraulic oil from the sealed oil tank (1), which is filtered by the filter (3) and then sent to the pressure regulating valve group (5). The pressure regulating valve group (5) is connected to an accumulator valve block (6) on one side, which is used to maintain the pressure. The pressure regulating valve group (5) is connected to a high-pressure sealing oil circuit (51) and a low-pressure sealing oil circuit (52) on the other side. The high-pressure sealing oil circuit (51) and the low-pressure sealing oil circuit (52) supply hydraulic seals to the methanol injection valve FBIV-M and the window valve ELBI, respectively.

2. The marine methanol main engine sealing oil unit according to claim 1, characterized in that, The sealed oil tank (1) is equipped with multiple liquid level sensors (11). The liquid level sensors (11) can detect high and low liquid levels. The control system receives the sensor signals and determines whether to perform oil replenishment or oil overflow alarm operation.

3. The marine methanol main engine sealing oil unit according to claim 1, characterized in that, The ventilation system (7) is located above the sealed oil tank (1) and is used to evaporate and vaporize the methanol mixed in the sealing oil and discharge it.

4. A marine methanol main engine sealing oil unit according to claim 1, characterized in that, It also includes a methanol concentration sensor (71); the methanol concentration sensor is installed in the ventilation system (7) and is used to detect the methanol concentration in real time, and to alarm or switch to fuel mode when the concentration exceeds the limit.

5. A marine methanol main engine sealing oil unit according to claim 1, characterized in that, It also includes a venting circuit (8), which is located between the sealing oil tank (1) and the pressure regulating valve assembly (5) to reduce the consumption of sealing oil.

6. A marine methanol main engine sealing oil unit according to claim 1, characterized in that, The pressure regulating valve group (5) is equipped with an electromagnetic reversing valve (53) and a throttle valve (54), which together with the temperature sensor (9) constitute a constant temperature regulation module. When the temperature sensor detects that the temperature is lower than the set value, the control system controls the electromagnetic reversing valve (53) and the throttle valve (54) to regulate. The sealing oil circulates through the throttle valve (54). Under the throttling and friction of the throttle valve (54), the hydraulic oil generates heat and the temperature rises until it reaches the set value.

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