A marine gas turbine oil seal device

Abstract

The present application belongs to the field of gas turbines, and particularly relates to an oil seal device for a marine gas turbine. It comprises: a vehicle body, an oil tank, a main oil supply line, an overflow line, a circulating oil supply line, an oil seal oil supply line, and an electrical control cabinet. The present application filters the lubricating oil through a filter for multiple cycles, which can effectively improve the cleanliness of the lubricating oil, enhance the quality of the oil seal lubricating oil, and significantly increase the storage time of the engine; an air cooler is arranged on the circulating oil supply line, and at the same time, the length of the resistance wire per unit axial length is increased by reasonably designing the heating resistance wire structure, which can reduce the preparation time for the cooling and heating dehydration processes and improve the overall oil seal efficiency; increasing the oil tank volume can seal the fuel system and the lubricating oil system at the same time, broadening the working capacity of the oil seal device; by reasonably designing the oil outlet, drain port, and return oil port structure of the oil tank, the lubricating oil utilization rate is improved, the oil seal cost is reduced, and the oil tank is completely drained and the cooling effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of gas turbines, and in particular to an oil seal device for a marine gas turbine. Background Art

[0002] As the main power source for ships, gas turbines place high demands on both the quantity and quality of maintenance equipment, such as shipboard gas turbine oil seals. To ensure continuous power, ships typically reserve several non-loaded gas turbines on board or at training bases as backup. These backup gas turbines may not be used for a long time, but prolonged storage in marine environments can easily lead to corrosion in the fuel and lubricating oil systems, significantly reducing the service life of the gas turbines. To prevent corrosion in the fuel and lubricating oil systems and extend the storage life of gas turbines, oil seals are required to seal the internal oil of the backup gas turbines while they are in operation. Therefore, oil seals are crucial to the normal operation and maintenance of shipboard gas turbines.

[0003] At present, there are still many defects in the oil sealing devices in the existing technology. For example, although some oil sealing devices are equipped with lubricating oil filters, the lubricating oil is only filtered once after being circulated and dehydrated at high temperature before being injected into the fuel system. The quality of the lubricating oil is difficult to reach the required accuracy level, and the oil sealing effect will be greatly reduced. After the lubricating oil is dehydrated at high temperature, it needs to be naturally cooled to the oil sealing temperature standard. The natural heat dissipation time is long, the preparation time of the entire oil sealing process is extended, and the oil sealing efficiency is low; the size of the fuel tank is relatively small, and it can only realize the oil sealing of the fuel system of the combustion engine, and the oil sealing capacity is limited. Due to the limitation of the fuel tank volume, the heating resistance wire inside the fuel tank is short, and the power per unit length of the resistance wire is fixed. The total power of the electric heater is very small. The heating time of the lubricating oil from room temperature to the dehydration temperature is long, and the oil sealing efficiency is low; the temperature requirement for the lubricating oil during oil sealing is generally 20℃~60℃. After the lubricating oil is filtered, dehydrated and cooled, the oil sealing operation may not be performed immediately. The oil will naturally cool down after being left idle for a long time, and the oil temperature will not meet the oil seal requirements. Currently, the existing oil seal devices do not have insulation structure or insulation function; there is no effective way to judge whether the filter is blocked. If the filter is blocked, the oil supply pressure loss will increase and cannot meet the oil supply pressure requirements, and the oil supply flow will also be reduced accordingly, the oil sealing time will be increased, and the oil sealing efficiency will be reduced; generally, there is a certain welding distance between the oil outlet of the oil tank and the bottom plate of the oil tank, which leads to the inability to fully utilize the oil at the bottom of the oil tank, the cost of the engine oil seal is increased, and resources are wasted; the gas turbine oil seal device is used in a marine environment (high temperature, high humidity, high salt fog), and the metal materials directly exposed to the outside are prone to accelerated corrosion failure; it is inconvenient to sample the oil during the filtration and heating dehydration process of the lubricating oil; the oil stains or remaining oil after cleaning are not discharged completely, which may affect the secondary oil seal.

[0004] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned deficiencies of the prior art. Summary of the Invention

[0005] The purpose of this application is to provide a marine gas turbine oil seal device to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] A marine gas turbine oil seal device, comprising:

[0008] vehicle body;

[0009] A fuel tank, the fuel tank being fixedly mounted on the vehicle body, having an oil outlet and an oil return port, an electric heater mounted on the fuel tank, and a temperature sensor and a magnetic flap level gauge mounted inside the fuel tank;

[0010] a main oil supply pipeline, wherein a first end of the main oil supply pipeline is connected to the oil outlet, and a gear pump motor, a first pressure sensor, a filter, and a second pressure sensor are sequentially provided from the first end to the second end of the main oil supply pipeline;

[0011] an overflow pipeline, wherein a first end of the overflow pipeline is connected to the main oil supply pipeline, a connection point is located downstream of the gear pump motor, a second end of the overflow pipeline is connected to the oil tank, and an overflow valve is provided on the overflow pipeline;

[0012] a circulating oil supply pipeline, wherein a first end of the circulating oil supply pipeline is connected to a second end of the main oil supply pipeline, and a second end of the circulating oil supply pipeline is connected to the oil return port, and a circulating solenoid switch valve and an air cooler are sequentially provided on the circulating oil supply pipeline from the first end to the second end;

[0013] an oil seal oil supply pipeline, wherein a first end of the oil seal oil supply pipeline is connected to a second end of the main oil supply pipeline, and a second end of the oil seal oil supply pipeline is connected to a fuel and lubricating oil system interface of the gas turbine via an oil supply hose, and an oil supply solenoid switch valve is provided on the oil seal oil supply pipeline;

[0014] An electrical control cabinet is used to control the opening and closing of the electric heater, the gear pump motor, the overflow valve, the circulation solenoid switch valve, the air cooler and the oil supply solenoid switch valve according to the signals of the temperature sensor, the magnetic flap level gauge, the first pressure sensor and the second pressure sensor.

[0015] In at least one embodiment of the present application, wheels and fixed feet are provided at the bottom of the vehicle body.

[0016] In at least one embodiment of the present application, the fuel tank is a rectangular parallelepiped structure with a capacity of 160L, and its bottom plate, side wall plate and top plate are all 3mm thin plates made of 022Cr17Ni12Mo2.

[0017] In at least one embodiment of the present application, the bottom plate of the oil tank is low in the middle and high on both sides, an oil drain interface is opened in the middle of the bottom plate, and a sewage discharge manual valve is provided on the oil drain interface.

[0018] In at least one embodiment of the present application, the oil outlet is located on the side wall plate of the oil tank, and a 90° elbow is installed at the oil outlet, and the 90° elbow is used to shorten the distance between the oil inlet end and the bottom plate.

[0019] In at least one embodiment of the present application, the oil return port is located on the top plate of the oil tank, and a U-shaped elbow is installed at the oil return port.

[0020] In at least one embodiment of the present application, a cleaning hand hole is provided on the side wall panel of the oil tank.

[0021] In at least one embodiment of the present application, an air filter is installed on the fuel tank.

[0022] In at least one embodiment of the present application, the electrical control cabinet is further configured to generate an alarm when the pressure difference between the two pressure sensors exceeds 0.35 MPa.

[0023] In at least one embodiment of the present application, a sampling needle valve is provided on the main oil supply pipeline between the first pressure sensor and the filter.

[0024] The invention has at least the following beneficial technical effects:

[0025] The ship gas turbine oil seal device of the present application can significantly improve the cleanliness of the oil seal lubricating oil, improve the quality of the lubricating oil, and extend the storage time of the engine oil after sealing; the heating power is large, which can reduce the heating and dehydration time, shorten the oil seal preparation time, and improve the oil seal efficiency; through the design of the air cooler, the cooling efficiency of the lubricating oil after heating and dehydration is high, shortening the oil seal preparation time; it has functions such as automatic lubricating oil insulation and automatic filter monitoring, and has a high degree of intelligence; using sampling needle valves and reasonable selection of exposed metal materials, it has high maintainability, security and environmental adaptability; the lubricating oil utilization rate is high, which greatly reduces the cost of oil seals. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a marine gas turbine oil seal device according to one embodiment of the present application;

[0027] Figure 2 This is an angled view of a marine gas turbine oil seal device according to one embodiment of the present application;

[0028] Figure 3 This is another angle view of the marine gas turbine oil seal device according to one embodiment of the present application;

[0029] Figure 4 is a schematic diagram of a fuel tank bottom plate according to one embodiment of the present application;

[0030] Figure 5 This is a schematic diagram of an oil outlet according to an embodiment of the present application;

[0031] Figure 6 This is a schematic diagram of an oil return port according to an embodiment of the present application;

[0032] Figure 7 This is a schematic diagram of an electric heater according to one embodiment of the present application.

[0033] in:

[0034] 1-Vehicle body; 2-Drain hand valve; 3-Fuel tank; 4-Magnetic flap level gauge; 5-Air filter; 6-Gear pump motor; 7-Pressure sensor; 8-Filter; 9-Oil supply solenoid switch valve; 10-Oil supply hose; 11-Circulation solenoid switch valve; 12-Sampling needle valve; 13-Overflow valve; 14-Air cooler; 15-Electric heater; 16-Temperature sensor; 17-Electric control cabinet; 18-Wheel; 19-Fixed foot; 20-Clean hand hole; 21-Oil drain interface; 22-Base plate; 23-90° elbow; 24-U-shaped elbow; 25-Resistance wire. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be understood as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of this application are described in detail below in conjunction with the drawings.

[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as limiting the scope of protection of this application.

[0037] The following is combined with Figures 1 to 7 This application is described in further detail.

[0038] The present application provides a marine gas turbine oil seal device, comprising: a vehicle body 1, an oil tank 3, a main oil supply pipeline, an overflow pipeline, a circulating oil supply pipeline, an oil seal oil supply pipeline, and an electrical control cabinet 17.

[0039] Specifically, such as Figure 2-3 As shown, the bottom of the vehicle body 1 is designed with wheels 18 and fixed feet 19. The fuel tank 3 is fixedly mounted on the vehicle body 1 by welding. The fuel tank 3 is provided with an oil outlet and an oil return port. An electric heater 15 is installed on the fuel tank 3. A temperature sensor 16 and a magnetic flap level gauge 4 are installed inside the fuel tank 3. In this embodiment, three electric heaters 15 are evenly arranged near the bottom of the fuel tank side wall. Through reasonable design, the length of the resistance wire 25 of the electric heater 15 is increased, thereby increasing the power of the electric heater 15 and achieving rapid heating and dehydration. The resistance wire 25 is designed into a spiral structure, which fully increases the length of the resistance wire 25 within the limited axial length space of the fuel tank 3.

[0040] In the preferred embodiment of the present application, the fuel tank 3 is a rectangular parallelepiped structure formed by welding thin plates. Its bottom plate 22, sidewall plates, and top plate are all 3mm thin plates, and the bottom plate 22, sidewall plates, and top plate of the fuel tank 3 are welded together. The impact of the environment on components is fully considered during the design process. In order to ensure long-term stable use in marine environments, the exposed metal parts of the fuel tank 3 are made of corrosion-resistant 022Cr17Ni12Mo2 (316L). Components that do not meet the three-proof requirements are physically isolated from the environment by an electrical control cabinet. Through reasonable design, the effective volume of the fuel tank 3 reaches 160L, which expands the working capacity of the oil seal device, and can not only seal the internal oil of the fuel system but also the lubricating oil system.

[0041] Advantageously, in this embodiment, Figure 4 As shown, the bottom plate 22 of the oil tank 3 is low in the middle and high on both sides. An oil drain port 21 is provided in the middle of the bottom plate 22. A drain valve 2 is provided on the drain port 21. The oil is drained through the drain valve 2 in the middle of the bottom plate 22, thereby achieving a clean and complete discharge of the oil from the oil tank 3. Figure 5As shown, the oil outlet is located on the side wall of the oil tank 3. In order to improve the utilization rate of the lubricating oil in the oil tank 3 during oil sealing, a 90° elbow 23 is installed at the oil outlet. The 90° elbow 23 is used to shorten the distance between the oil inlet end and the bottom plate 22, ensuring that the lubricating oil at the bottom of the oil tank 3 can also be fully utilized. Figure 6 As shown, the oil return port is located on the top plate of the oil tank 3, and a U-shaped elbow 24 is installed at the oil return port. When the lubricating oil returns, it will form a fountain-like effect, increasing the heat exchange area with the air and achieving rapid cooling.

[0042] Advantageously, in this embodiment, a hand cleaning hole 20 is provided on the side wall of the fuel tank 3 , and an air filter 5 is designed above the fuel tank 3 .

[0043] In the marine gas turbine oil seal device of this application, the first end of the main oil supply pipeline is connected to the oil outlet. A gear pump motor 6, a first pressure sensor, a filter 8, and a second pressure sensor are sequentially provided along the main oil supply pipeline from the first end to the second end. The arrangement of filter 8 filters the lubricating oil, improving its quality and ensuring the effectiveness of the oil seal.

[0044] The ship gas turbine oil seal device of the present application has a first end of the overflow pipeline connected to the main oil supply pipeline, the access point is located downstream of the gear pump motor 6, the second end of the overflow pipeline is connected to the oil tank 3, and an overflow valve 13 is provided on the overflow pipeline.

[0045] The marine gas turbine oil seal device of the present application has a circulating oil supply line with a first end connected to a main oil supply line with a second end connected to an oil return port. A circulating solenoid on-off valve 11 and an air cooler 14 are sequentially provided on the circulating oil supply line from the first end to the second end. The air cooler 14 utilizes forced convection heat transfer to rapidly cool the lubricating oil after high-temperature dehydration. The fin structure increases the convection heat transfer area between the lubricating oil and the air, achieving rapid cooling of the lubricating oil.

[0046] The ship gas turbine oil seal device of the present application has a first end of the oil seal oil supply pipeline connected to the second end of the main oil supply pipeline, and the second end of the oil seal oil supply pipeline is connected to the fuel and lubricating oil system interface of the gas turbine through an oil supply hose 10, and an oil supply solenoid switch valve 9 is provided on the oil seal oil supply pipeline.

[0047] In the marine gas turbine oil seal device of the present application, the electrical control cabinet 17 is used to control the opening and closing of the electric heater 15, the gear pump motor 6, the relief valve 13, the circulation electromagnetic on-off valve 11, the air cooler 14, and the oil supply electromagnetic on-off valve 9 based on signals from the temperature sensor 16, the magnetic flap level gauge 4, the first pressure sensor, and the second pressure sensor. The electrical control cabinet 17 implements the automatic heat preservation function of the oil tank 3 through PLC control. The temperature sensor 16 inside the oil tank 3 collects temperature signals. Based on the set temperature range, the electrical control cabinet 17 turns on the electric heater 15 when the lubricating oil temperature monitored by the temperature sensor 16 is lower than the set temperature, and turns off the electric heater 15 when the monitored temperature is higher than the set temperature range, ensuring that the lubricating oil temperature in the oil tank 3 always remains within the set temperature range. Advantageously, in this embodiment, the electrical control cabinet 17 is also used to alarm when the pressure difference between the two pressure sensors 7 exceeds 0.35 MPa, and the filter 8 realizes a blockage alarm function. When the front and rear pressure difference exceeds 0.35 MPa, it proves that the filter 8 is blocked and needs to be cleaned or replaced.

[0048] Advantageously, in this embodiment, a sampling needle valve 12 is provided on the main oil supply line between the first pressure sensor and the filter 8 to facilitate oil sampling. The sampling needle valve 12 is designed at a suitable location on the main oil supply line. After the circulating filtration and heating and dehydration processes are completed, the sampling needle valve 12 is opened to take a sample for testing.

[0049] The marine gas turbine oil seal device of this application can inject lubricating oil and its rust inhibitor, meeting certain pressure, temperature, and cleanliness requirements, into the gas turbine fuel and lubricating oil systems through the oil supply hose 10 during cold operation, achieving oil sealing. This device primarily includes four operating modes: circulating filtration, heating and dehydration, cooling and insulation, and oil sealing. The details are as follows:

[0050] a) Circulation filtration: Adjust the relief valve 13 to the maximum opening, close the oil supply electromagnetic switch valve 9, close the circulation electromagnetic switch valve 11, start the gear pump motor 6, and gradually reduce the opening of the relief valve 13 until the pressure sensor 7 upstream of the filter 8 reaches the relief valve working pressure. Open the circulation electromagnetic switch valve 11, and the lubricating oil in the oil tank 3 begins to circulate and filter. During the filtration process, take oil from the sampling needle valve 12 for testing. If the lubricating oil cleanliness meets the requirements, the filtration is complete;

[0051] b) Heating and dehydrating: The electric heater 15 is started to heat the lubricating oil in a circulating manner. The temperature sensor 16 monitors the lubricating oil temperature in the oil tank 3 and automatically controls the start and stop of the electric heater 15 to keep the lubricating oil temperature within the range of 105-110°C. The lubricating oil is dehydrated within this temperature range. When the lubricating oil no longer generates bubbles, the dehydration process is completed.

[0052] c) Cooling and heat preservation: The air cooler 14 is started. When the lubricating oil temperature drops to 60°C, the air cooler 14 is shut down. During the heat preservation process, the electrical control cabinet 17 automatically controls the start and stop of the electric heater 15 based on the feedback signal from the temperature sensor 16, so that the lubricating oil temperature is always maintained within the range of 50-60°C, thus achieving the lubricating oil heat preservation function.

[0053] d) Oil sealing: Connect the oil seal interface of the gas turbine fuel and lubricating oil system through the oil supply hose 10, open the oil supply electromagnetic switch valve 9, close the circulation electromagnetic switch valve 11, and the gas turbine begins oil sealing; during the oil sealing process, the temperature sensor 16 monitors the lubricating oil temperature in real time, and the electrical control cabinet 17 automatically controls the start and stop of the electric heater 15 to keep the lubricating oil temperature always within the range of 20-60°C, completing the oil sealing of the gas turbine.

[0054] The ship gas turbine oil seal device of the present application arranges a glass fiber filter 8, and the lubricating oil undergoes multiple circulation filtrations, which can effectively improve the cleanliness of the lubricating oil, enhance the quality of the oil seal lubricating oil, and significantly increase the storage time of the engine; an air cooler 14 is arranged on the circulating oil supply pipeline, and at the same time, the length of the resistance wire 25 per unit axial length is increased by reasonably designing the structure of the heating resistance wire 25, which can reduce the preparation time for the cooling and heating dehydration processes and improve the overall oil seal efficiency; increasing the volume of the oil tank 3 can simultaneously seal the fuel system and the lubricating oil system, widening the The working capacity of the oil seal device; through the reasonable design of the oil tank oil outlet, oil drain port and oil return port structure, the lubricating oil utilization rate is improved, the oil seal cost is reduced, and the oil tank is completely drained and the cooling effect is guaranteed; pressure transmitters are designed at both ends of the filter 8 to monitor whether the filter is blocked; reasonable material selection is made for metal structures exposed to the marine environment to avoid corrosion and extend the service life of the oil seal device; a needle valve is designed to facilitate oil sampling; the temperature sensor 16 and the electric heater 15 are reasonably controlled by PLC to achieve the insulation function and achieve the purpose of weight reduction.

[0055] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A marine gas turbine oil seal device, characterized in that: include: Vehicle body (1); A fuel tank (3), the fuel tank (3) is fixedly mounted on the vehicle body (1), an oil outlet and an oil return port are provided on the fuel tank (3), an electric heater (15) is installed on the fuel tank (3), and a temperature sensor (16) and a magnetic flap level gauge (4) are installed inside the fuel tank (3); a main oil supply pipeline, wherein a first end of the main oil supply pipeline is connected to the oil outlet, and a gear pump motor (6), a first pressure sensor, a filter (8), and a second pressure sensor are sequentially provided on the main oil supply pipeline from the first end to the second end; an overflow pipeline, wherein a first end of the overflow pipeline is connected to the main oil supply pipeline, a connection point is located downstream of the gear pump motor (6), a second end of the overflow pipeline is connected to the oil tank (3), and an overflow valve (13) is provided on the overflow pipeline; a circulating oil supply pipeline, wherein the first end of the circulating oil supply pipeline is connected to the second end of the main oil supply pipeline, the second end of the circulating oil supply pipeline is connected to the oil return port, and a circulating electromagnetic switch valve (11) and an air cooler (14) are sequentially provided on the circulating oil supply pipeline from the first end to the second end; An oil seal oil supply pipeline, wherein a first end of the oil seal oil supply pipeline is connected to a second end of the main oil supply pipeline, and a second end of the oil seal oil supply pipeline is connected to a fuel and lubricating oil system interface of a gas turbine via an oil supply hose (10), and an oil supply electromagnetic switch valve (9) is provided on the oil seal oil supply pipeline; an electrical control cabinet (17), the electrical control cabinet (17) being used for controlling the opening and closing of the electric heater (15), the gear pump motor (6), the overflow valve (13), the circulation electromagnetic switch valve (11), the air cooler (14), and the oil supply electromagnetic switch valve (9) according to signals from the temperature sensor (16), the magnetic flap level gauge (4), the first pressure sensor, and the second pressure sensor; The oil outlet is located on the side wall of the oil tank (3), and a 90° elbow (23) is installed at the oil outlet. The 90° elbow (23) is used to shorten the distance between the oil inlet end and the bottom plate (22); The oil return port is located on the top plate of the oil tank (3), and a U-shaped elbow (24) is installed at the oil return port; The electrical control cabinet (17) is also used to generate an alarm when the pressure difference between the two pressure sensors (7) exceeds 0.35 MPa.

2. The marine gas turbine oil seal device according to claim 1, characterized in that: The bottom of the vehicle body (1) is provided with wheels (18) and fixed feet (19).

3. The marine gas turbine oil seal device according to claim 1, characterized in that: The oil tank (3) is a rectangular parallelepiped structure with a capacity of 160L, and its bottom plate (22), side wall plate and top plate are all 3mm thin plates made of 022Cr17Ni12Mo2.

4. The marine gas turbine oil seal device according to claim 3, characterized in that: The bottom plate (22) of the oil tank (3) is low in the middle and high on both sides. An oil discharge interface (21) is provided in the middle of the bottom plate (22), and a sewage discharge manual valve (2) is provided on the oil discharge interface (21).

5. The marine gas turbine oil seal device according to claim 4, characterized in that: A hand cleaning hole (20) is provided on the side wall plate of the oil tank (3).

6. The marine gas turbine oil seal device according to claim 5, characterized in that: An air filter (5) is installed on the oil tank (3).

7. The marine gas turbine oil seal device according to claim 6, characterized in that: A sampling needle valve (12) is provided on the main oil supply pipeline between the first pressure sensor and the filter (8).

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