Fuel oil return cooling system and engine unit
By introducing control of water sensors and electric valves in the fuel return cooling system, the system failure caused by water in fuel is solved, the engine structure is simplified, and it is suitable for different ships, which improves the competitiveness of the engine.
Patent Information
- Application Number
- CN202422530174.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-19
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-19
AI Technical Summary
The existing fuel return coolers have poor versatility and cannot effectively solve the problem of fuel system failure caused by the mixing of water into the fuel. Different models of ships require different cooler designs, resulting in complex structures and prone to operational problems.
Design a system including a fuel return cooler and storage box, equipped with a water sensor in oil and an electric valve, control the opening of the electric valve through the controller, detect and discharge water in the fuel, simplify the engine structure, and is suitable for different ships.
It realizes self-protection of the fuel system, prevents water from entering the fuel system, simplifies the engine unit structure, and improves the competitiveness and adaptability of the engine.
Smart Images
Figure CN223120064U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine cooling systems, and particularly relates to a fuel oil return cooling system and an engine set. Background Art
[0002] A return oil cooler is a heat exchanger used to cool the fuel oil return to a suitable temperature. The function of the return oil cooler for ships is to ensure that the fuel oil return temperature is within a reasonable range. Different types of ships generally have different installation positions of the fuel tanks of their marine engines, that is, different return oil heights and return oil resistances. Therefore, different types of ships require different fuel oil return coolers.
[0003] In the prior art, the universality of the fuel oil return cooler is poor. Due to the different positions of the fuel tanks designed in the engine room, different fuel oil return cooling technical solutions need to be provided to meet different return oil height requirements, which is time-consuming and laborious, and it is very easy to cause problems in the operation of the engine due to poor fuel oil return. At the same time, the existing fuel oil return coolers cannot solve the problems of fuel system failures caused by water mixed in the fuel. Summary of the Utility Model
[0004] Aiming at the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide a fuel oil return cooling system and an engine set. The fuel oil return cooling system can solve the problems of fuel system failures caused by water mixed in the fuel, and is applicable to different ships. At the same time, the structure of the engine set is simplified, the return oil pipeline outside the engine can be saved, and the competitiveness of the engine can be improved.
[0005] To solve the above technical problems, the utility model provides a fuel oil return cooling system, which includes a fuel oil return cooler and a fuel storage tank. The fuel oil return cooler includes a cooling water inlet, a cooling water outlet, a fuel oil inlet, and a fuel oil cooled channel. The fuel oil return cooler and the fuel storage tank are connected through the fuel oil cooled channel. The fuel storage tank includes a fuel oil outlet and a bottom discharge port. A first water-in-oil sensor and a second water-in-oil sensor are installed in the fuel storage tank. The second water-in-oil sensor is located below the first water-in-oil sensor.
[0006] The fuel oil outlet is connected to a fuel pipeline leading to the engine oil inlet. A first electric valve is arranged on the fuel pipeline. The bottom discharge port is connected to a discharge pipeline. A second electric valve and a one-way valve are arranged on the discharge pipeline.
[0007] The first electric valve, the second electric valve, the first water-in-oil sensor, and the second water-in-oil sensor are electrically connected to a controller.
[0008] Preferably, the water-in-oil sensor II is installed on the side wall of the fuel storage tank and close to the bottom of the fuel storage tank.
[0009] Preferably, an inclined guiding part is arranged at the bottom of the fuel storage tank, and the low end of the inclined guiding part is close to the bottom discharge port.
[0010] Preferably, the fuel pipeline is fixedly connected to the engine fuel inlet.
[0011] Preferably, the discharge pipeline is connected with a dirty oil tank, and the one-way valve is arranged on the discharge pipeline between the second electric valve and the dirty oil tank.
[0012] Preferably, the fuel oil return cooler includes a fuel oil return cooler housing, an internal cooling medium passage is arranged in the fuel oil return cooler housing, and the cooling water inlet and the cooling water outlet are communicated with the internal cooling medium passage.
[0013] An engine set includes the above fuel oil return cooling system.
[0014] Preferably, the engine set includes an engine, an internal oil return passage is arranged inside the engine, and the fuel inlet is connected with the internal oil return passage.
[0015] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:
[0016] The fuel oil return cooling system of the present utility model detects whether there is water in the return oil through the water-in-oil sensor I and the water-in-oil sensor II. The above two sensors send signals to the controller according to the detection situation. The controller receives the corresponding signals and issues corresponding control commands to control the different opening degrees or closures of the first electric valve and the second electric valve, so as to discharge the water entering the fuel system. It avoids water entering the fuel system due to problems with the fuel oil return cooler. At the same time, the engine only needs to design one engine fuel inlet, and there is no need to design an external oil return interface for the engine. After the fuel oil return flows through this fuel oil return cooling system, it can directly enter the engine, saving the oil return pipeline outside the engine, simplifying the structure of the engine set, and enhancing the competitiveness of the engine. The fuel oil return cooling system of the present utility model can be applied to different ships. Description of the Drawings
[0017] Figure 1 is a schematic diagram of the fuel oil return cooling system of the present utility model;
[0018] In the figure: 1, cooling water inlet; 2, cooling water outlet; 3, fuel return oil cooler; 5, fuel storage tank; 500, inclined guiding part; 501, bottom discharge port; 6, fuel outlet; 7, first electric valve; 8, controller; 9, first water-in-oil sensor; 10, second water-in-oil sensor; 11, fuel passage after cooling; 12, fuel inlet; 13, second electric valve; 14, check valve; 15, dirty oil tank. Specific embodiments
[0019] The technical solution of the present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and efficacy of the present utility model, but it is not intended to limit the protection scope of the appended claims of the present utility model.
[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "row", "column", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0021] In addition, although terms such as first, second, and third can be used in the text to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms can only be used to distinguish one element, component, region, layer, or segment from another region, layer, or segment. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms do not imply an order or sequence when used in the text. Therefore, the first element, component, region, layer, or segment discussed below can be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.
[0022] An embodiment of the present utility model provides a Figure 1 fuel return oil cooling system as shown, including a fuel return oil cooler 3 and a fuel storage tank 5. The fuel return oil cooler 3 includes a cooling water inlet 1, a cooling water outlet 2, a fuel inlet 12, and a fuel passage 11 after cooling. The fuel return oil cooler 3 and the fuel storage tank 5 are connected through the fuel passage 11 after cooling. The fuel storage tank 5 includes a fuel outlet 6 and a bottom discharge port 501. A first water-in-oil sensor 9 and a second water-in-oil sensor 10 are installed in the fuel storage tank 5, and the second water-in-oil sensor 10 is located below the first water-in-oil sensor 9.
[0023] The fuel outlet 6 is connected to a fuel pipeline leading to the engine fuel inlet, and a first electric valve 7 is provided on the fuel pipeline. The bottom discharge port 501 is connected to a discharge pipeline, and a second electric valve 13 and a one-way valve 14 are provided on the discharge pipeline.
[0024] The first electric valve 7, the second electric valve 13, the first water-in-oil sensor 9 and the second water-in-oil sensor 10 are electrically connected to the controller.
[0025] The second water-in-oil sensor 10 is installed on the side wall of the fuel storage tank 5 and close to the bottom of the fuel storage tank 5. When water enters the fuel storage tank 5 and the first water-in-oil sensor 9 and the second water-in-oil sensor 10 detect that water is mixed into the fuel in the fuel storage tank 5, a signal is transmitted to the controller 8.
[0026] The bottom of the fuel storage tank 5 is provided with an inclined guiding part 500, with one end of the inclined guiding part 500 being high and the other end being low. This setting facilitates the flow of liquid towards the bottom discharge port 501. When water is mixed into the fuel in the fuel storage tank 5, the water needs to be discharged from the bottom discharge port 501. Therefore, the inclined guiding part 500 discharges the water or water-oil mixture from the bottom discharge port 501. As Figure 1 shown, the left end of the inclined guiding part 500 is high and the right end is low, and the low end of the inclined guiding part 500 is close to the bottom discharge port 501.
[0027] In some embodiments, the fuel pipeline is fixedly connected to the engine fuel inlet.
[0028] In some embodiments, the discharge pipeline is connected to a waste oil tank 15, and the one-way valve 14 is located on the discharge pipeline between the second electric valve 13 and the waste oil tank 15.
[0029] The fuel return cooler 3 includes a fuel return cooler 3 housing, and an internal cooling medium passage is provided in the fuel return cooler 3 housing. The cooling water inlet 1 and the cooling water outlet 2 are communicated with the internal cooling medium passage.
[0030] In some embodiments, the engine set includes a fuel return cooling system. The engine set also includes an engine, and there is an internal return oil passage inside the engine. The fuel inlet 12 is connected to the internal return oil passage. There is no need to design an external engine return oil interface on the engine, saving the return oil pipeline outside the engine and avoiding engine failures caused by return oil problems.
[0031] The fuel oil return cooling system of the utility model does not need to consider the location of the oil tanks of different ships, nor does it need to consider the differences in oil return height and oil return resistance, and can be applied to different ships. The fuel oil return cooling system of the utility model can omit the external oil return interface of the engine, and the engine only needs to be designed with one engine oil inlet, which improves the competitiveness of the engine. At the same time, the fuel oil return cooling system of the utility model can discharge water mixed into the fuel storage tank due to problems with the fuel oil return cooler, thereby avoiding water from entering the fuel system due to problems with the fuel oil return cooler, thereby avoiding failure of the fuel system and damage to the engine.
[0032] During the operation of the engine, cooling water enters the fuel return cooler 3 through the cooling water inlet 1, and the cooling water exchanges heat with the fuel. After the cooling water cools the fuel, it flows out from the cooling water outlet 2. The fuel to be cooled enters the fuel return cooler 3 through the fuel inlet 12, and after being cooled, the fuel enters the fuel storage tank 5 through the fuel cooling channel 11.
[0033] When the fuel return cooler 3 and the fuel storage tank 5 work normally, the valve of the first electric valve 7 is in the open state, and the cooled fuel in the fuel storage tank 5 flows into the engine oil inlet through the fuel outlet 6 and the first electric valve 7, and enters the engine fuel system together with the engine oil inlet. At this time, the cross-sectional area of the fuel outlet 6, the open cross-sectional area of the first electric valve 7, and the cross-sectional area of the fuel cooling passage 11 are the same, and the opening degree of the first electric valve 7 at this time is assumed to be state one.
[0034] When the cooling water flows into the fuel due to the poor sealing of the fuel return cooler 3 or the rupture of the pipeline, if a small amount of water enters the fuel storage tank 5, the second water in oil sensor 10 sends a signal, and the controller 8 receives the signal sent by the second water in oil sensor 10, and the controller 8 controls the alarm to sound an alarm. At the same time, the controller 8 controls the first electric valve 7 to reduce the valve opening, and the opening of the first electric valve 7 is set to state 2 at this time. At the same time, the controller 8 controls the valve of the second electric valve 13 to open, and the opening of the second electric valve 13 is set to state 1 at this time, and the water in the oil in the fuel storage tank 5 is released, and the water in the oil flows to the dirty oil tank 15 after passing through the discharge pipeline and the second electric valve 13 and the one-way valve 14.
[0035] When the water in the fuel tank 5 is drained, the second water in the fuel sensor 10 detects that there is no water in the fuel and sends a signal to the controller 8, and the controller 8 controls the alarm to stop sounding. At the same time, the controller 8 controls the valve state of the first electric valve 7 to change the opening of the first electric valve 7 to state 1. At the same time, the controller 8 controls the valve of the second electric valve 13 to close.
[0036] When a large amount of water enters the fuel storage tank 5, the water-in-first-oil sensor 9 sends a signal. The controller 8 receives the signal sent by the water-in-first-oil sensor 9, and the controller 8 controls the alarm to give an alarm. At the same time, the controller 8 controls the valve of the first electric valve 7 to close. Meanwhile, the controller 8 controls the valve of the second electric valve 13 to open. Suppose the opening degree of the second electric valve 13 at this time is state two. The oil-water mixture is discharged from the bottom discharge port 501 of the fuel storage tank 5. The oil-water mixture flows through the discharge pipeline, the second electric valve 13 and the check valve 14 and then flows to the waste oil tank 15.
[0037] Among them, the flow rate of the first electric valve 7 when its opening degree is in state one is larger than that when its opening degree is in state two, and the flow rate of the second electric valve 13 when its opening degree is in state two is larger than that when its opening degree is in state one.
[0038] The check valve 14 ensures that the oil-water mixture can only flow to the waste oil tank and cannot flow back from the waste oil tank 15.
[0039] The fuel return oil cooling system of the present utility model detects whether there is water in the return oil through the water-in-first-oil sensor and the water-in-second-oil sensor. The above two sensors can send signals to the controller. The controller receives the corresponding signals and issues corresponding control commands to control the different opening degrees or closures of the first electric valve and the second electric valve. It prevents water from entering the fuel system due to problems with the fuel return oil cooler. At the same time, after the fuel return oil flows through this fuel return oil cooling system, it can directly enter the engine without designing an external return oil interface for the engine, saving the return oil pipeline outside the engine and avoiding engine failures caused by return oil problems.
[0040] The present utility model is not limited to the above embodiments. All improvements made based on the concept, principle, structure and method of the present utility model are within the protection scope of the present utility model.
Claims
1. A fuel return cooling system, comprising a fuel return cooler and a fuel storage tank, characterized in that: The fuel return cooler includes a cooling water inlet, a cooling water outlet, a fuel inlet, and a fuel post-cooling channel. The fuel return cooler and the fuel storage tank are connected through the fuel post-cooling channel. The fuel storage tank includes a fuel outlet and a bottom discharge port. A first water-in-oil sensor and a second water-in-oil sensor are installed in the fuel storage tank. The second water-in-oil sensor is located below the first water-in-oil sensor. The fuel outlet is connected to a fuel pipeline leading to the engine inlet. A first electric valve is provided on the fuel pipeline. The bottom discharge port is connected to a discharge pipeline. A second electric valve and a check valve are provided on the discharge pipeline. The first electric valve, the second electric valve, the first water-in-oil sensor, and the second water-in-oil sensor are electrically connected to a controller.
2. The fuel return oil cooling system according to claim 1, wherein: The second water-in-oil sensor is installed on the side wall of the fuel storage tank and close to the bottom of the fuel storage tank.
3. The fuel return cooling system according to claim 2, wherein: An inclined guiding portion is provided at the bottom of the fuel storage tank. The low end of the inclined guiding portion is close to the bottom discharge port.
4. The fuel return oil cooling system according to claim 1, wherein: The fuel pipeline is fixedly connected to the engine inlet.
5. The fuel return oil cooling system according to claim 1, characterized in that: The discharge pipeline is connected to a waste oil tank. The check valve is located on the discharge pipeline between the second electric valve and the waste oil tank.
6. The fuel return oil cooling system according to claim 1, wherein: The fuel return cooler includes a fuel return cooler housing. An internal cooling medium passing cavity is provided in the fuel return cooler housing. The cooling water inlet and the cooling water outlet are connected to the internal cooling medium passing cavity.
7. An engine set, characterized in that: Including the fuel return cooling system according to any one of claims 1 to 6.
8. The engine set according to claim 7, characterized in that: Including an engine, an internal return oil channel is provided inside the engine, and the fuel inlet is connected to the internal return oil channel.