Stern tube lubricating and cooling system

Abstract

The utility model relates to the field of ship engineering, and discloses a stern tube lubricating and cooling system which comprises a stern tube, a stern shaft, a front bearing and a rear bearing. The front bearing and the rear bearing are arranged in the stern tube in a spaced mode in the front-back direction and located between the oil inlet and the oil outlet, and the stern shaft penetrates through the stern tube and is connected with the stern tube through the front bearing and the rear bearing. A containing cavity used for containing lubricating oil is formed between the inner circumferential wall of the stern tube and the outer circumferential wall of the stern shaft, blades used for guiding the lubricating oil to flow from front to back are further arranged on the inner circumferential wall of the stern tube in a protruding mode, and the blades are arranged between the front bearing and the rear bearing. Lubricating oil can form forced circulation flow in the stern tube, so that the cooling efficiency of the bearing is improved, the abrasion of the bearing is reduced, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to ship engineering technical field especially, is a kind of stern tube lubrication cooling system. BACKGROUND

[0002] In ship engineering, stern shaft lubrication system is an important component to ensure the normal operation of ship propulsion system. The traditional stern shaft oil lubrication system is usually composed of stern shaft, stern tube, stern tube front bearing, stern tube rear bearing, front sealing device, rear sealing device, lubricating oil, cooling water tank and other components. The main function of this system is to lubricate and cool the stern shaft and its related components through lubricating oil to reduce friction and wear, and prolong the service life of equipment.

[0003] Under normal navigation conditions, the stern tube is filled with lubricating oil, and the stern tube and lubricating oil are cooled by cooling water. The front and rear bearings of the stern tube rely on the flow of lubricating oil for cooling. However, in the prior art, the lubricating oil in the stern tube often lacks effective circulation, resulting in low cooling efficiency of the lubricating oil and local temperature rise, which makes the bearings prone to heat and wear. This situation not only shortens the service life of the bearings, but also may cause the ship to malfunction during navigation, affecting safety and reliability.

[0004] To solve this problem, some ships use electric circulating pumps to force circulation of lubricating oil to improve cooling efficiency. However, the complexity of this system is significantly increased, requiring additional equipment and power support. In addition, in emergency situations, the electric circulating pump needs to be connected to both the main power supply and the emergency power supply to ensure the normal operation of the system, which further increases the design and maintenance difficulty of the system.

[0005] Therefore, the existing stern shaft lubricating oil system has deficiencies in cooling efficiency, equipment complexity and emergency response capability, and needs to be improved and innovated to improve the safety and reliability of ships. SUMMARY

[0006] The utility model aims at: design a kind of stern tube lubrication cooling system that can improve the cooling efficiency of stern shaft lubrication.

[0007] To achieve the above purpose, the utility model provides a kind of stern tube lubrication cooling system, including: stern tube, stern shaft, front bearing and rear bearing,

[0008] The stern tube is provided with an oil inlet and an oil outlet at two ends in the front-rear direction, the front bearing and the rear bearing are arranged in the stern tube in the front-rear direction and located between the oil inlet and the oil outlet, the stern shaft penetrates the stern tube and is connected with the stern tube through the front bearing and the rear bearing, a containing cavity for containing lubricating oil is arranged between the inner circumferential wall of the stern tube and the outer circumferential wall of the stern shaft, and the inner circumferential wall of the stern tube is further provided with a vane for guiding the lubricating oil to flow from front to back, the vane is arranged between the front bearing and the rear bearing.

[0009] Further, the inner circumferential wall of the stern tube is provided with a plurality of vanes, and each vane is arranged in sequence and at intervals in the axial direction of the stern tube.

[0010] Further, the vane comprises at least two sub-pieces, and the at least two sub-pieces are arranged at equal intervals in the circumferential direction of the stern tube.

[0011] Further, the vane is arranged at intervals with the stern shaft.

[0012] Further, the stern tube comprises a first bearing seat, a tube body and a second bearing seat connected in sequence in the front-rear direction, the front bearing is arranged in the first bearing seat, the rear bearing is arranged in the second bearing seat, the oil inlet is arranged at the front end of the first bearing seat, a first sealing assembly is further connected between the front end of the first bearing seat and the stern shaft, the oil outlet is arranged at the rear end of the second bearing seat, a second sealing assembly is further connected between the rear end of the second bearing seat and the stern shaft, and the vane is arranged on the inner circumferential wall of the tube body.

[0013] Further, it further comprises an oil tank, an oil feeding pipeline and an oil return pipeline, the oil tank is communicated with the oil inlet through the oil feeding pipeline, the oil tank is communicated with the oil outlet through the oil return pipeline, and a conveying assembly for making the lubricating oil flow from the oil return pipeline to the oil feeding pipeline is further arranged in the oil tank.

[0014] Further, it further comprises a cooling water tank, the stern tube penetrates the cooling water tank, and cooling liquid is arranged between the outer circumferential wall of the stern tube and the inner circumferential wall of the cooling water tank.

[0015] Further, the oil inlet is located below the stern tube, and the oil outlet is located above the stern tube.

[0016] Further, the vane is a spiral vane, and the spiral direction of the vane matches the rotation direction of the stern shaft.

[0017] Further, the inner circumferential wall of the stern tube is further provided with a flow guide groove for guiding the lubricating oil to flow from front to back.

[0018] Compared with the prior art, the beneficial effects of the stern tube lubrication and cooling system of this utility model embodiment are as follows:

[0019] The stern tube lubrication and cooling system of this utility model has blades on the inner circumferential wall of the stern tube. These blades, in conjunction with the rotation of the stern shaft, guide the lubricating oil to form a forced flow and circulating cooling system within the stern tube from front to back. This improves the cooling efficiency of the lubricating oil on the stern shaft, front bearing, and rear bearing, preventing localized temperature rise, reducing wear on the front and rear bearings, and extending the service life of the stern tube and the front and rear bearings. This utility model has a simple structure, significant effects, requires no additional equipment or electricity, and is easy to manufacture and use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the stern tube lubrication and cooling system according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0022] In the diagram, 1. Stern tube; 10. Receptacle; 11. Oil inlet; 12. Oil outlet; 13. First bearing housing; 14. Tube body; 15. Second bearing housing; 2. Stern shaft; 3. Front bearing; 4. Rear bearing; 5. Blade; 6. First sealing assembly; 7. Second sealing assembly; 8. Oil tank; 81. Oil supply line; 82. Oil return line; 9. Cooling water tank; 90. Coolant. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this invention, terms such as "first" and "second" are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0027] In the description of this utility model, "forward" in the front-back direction refers to the forward direction of the ship while it is sailing, and "backward" refers to the backward direction of the ship while it is sailing.

[0028] Reference Figure 1 and Figure 2 A lubrication and cooling system for a stern tube 1 according to an embodiment of the present invention includes: a stern tube 1, a stern shaft 2, a front bearing 3, and a rear bearing 4.

[0029] The stern tube 1 has an oil inlet 11 and an oil outlet 12 at both ends along the front-to-back direction. The front bearing 3 and the rear bearing 4 are spaced apart in the stern tube 1 along the front-to-back direction and are both located between the oil inlet 11 and the oil outlet 12. The stern shaft 2 passes through the stern tube 1 and is connected to the stern tube 1 through the front bearing 3 and the rear bearing 4 respectively. A receiving cavity 10 for accommodating lubricating oil is provided between the inner peripheral wall of the stern tube 1 and the outer peripheral wall of the stern shaft 2. The inner peripheral wall of the stern tube 1 is also provided with a blade 5 for guiding the lubricating oil to flow from front to back. The blade 5 is located between the front bearing 3 and the rear bearing 4.

[0030] The blades 5 installed on the inner circumferential wall of the stern tube 1 can cooperate with the rotation of the stern shaft 2. By utilizing the adsorption effect of the lubricating oil, the lubricating oil is guided to form a forced circulation flow from front to back in the stern tube 1, which circulates and cools the stern shaft 2, front bearing 3 and rear bearing 4. This improves the cooling efficiency of the lubricating oil on the stern shaft 2, front bearing 3 and rear bearing 4, avoids local temperature rise, reduces the wear of front bearing 3 and rear bearing 4, and extends the service life of stern tube 1 and front and rear bearings 4.

[0031] In some improvements of this application, the inner peripheral wall of the stern tube 1 is provided with a plurality of blades 5, and each blade 5 is arranged sequentially at intervals along the axial direction of the stern tube 1 to ensure that the lubricating oil flows uniformly in the entire front-rear direction of the stern tube 1.

[0032] In some improvements of this application, the blade 5 includes at least two sub-blades, which are equally spaced along the circumference of the stern tube 1 to ensure that the lubricating oil flows uniformly throughout the entire accommodating cavity 10.

[0033] In some improvements of this application, the blade 5 and the stern shaft 2 are spaced apart. This gap between the blade 5 and the stern shaft 2 prevents rubbing between them and facilitates the flow of lubricating oil.

[0034] In some improvements of this application, the stern tube 1 includes a first bearing seat 13, a tube body 14, and a second bearing seat 15 connected sequentially in the front-rear direction. The front bearing 3 is disposed in the first bearing seat 13, and the rear bearing 4 is disposed in the second bearing seat 15. The oil inlet 11 is opened at the front end of the first bearing seat 13, and a first sealing assembly 6 is also connected between the front end of the first bearing seat 13 and the stern shaft 2. The oil outlet 12 is opened at the rear end of the second bearing seat 15, and a second sealing assembly 7 is also connected between the rear end of the second bearing seat 15 and the stern shaft 2. The blade 5 is disposed on the inner peripheral wall of the tube body 14.

[0035] The first sealing component and the second sealing component 7 are used to prevent lubricating oil leakage and seawater infiltration. The first bearing housing 13, the pipe body 14 and the second bearing housing 15 can be connected by welding. The pipe body 14 can be a steel pipe. When the diameter of the steel pipe is large, a seamless steel pipe can be used. Workers can enter the construction site to weld the blade 5. When the diameter of the steel pipe is small, a construction process of rolling the steel plate in half and then welding the blade 5, and then closing the half together can be used to install the blade 5.

[0036] In some improvements to this application, an oil tank 8, an oil supply line 81, and a return line 82 are also included. The oil tank 8 is connected to the oil inlet 11 via the oil supply line 81, and the oil tank 8 is connected to the oil outlet 12 via the return line 82. The oil tank 8 is also equipped with a conveying assembly for allowing lubricating oil to flow from the return line 82 to the oil supply line 81. The conveying assembly can be an oil pump to further promote the circulation of lubricating oil within the stern tube 1.

[0037] In some improvements of this application, a cooling water tank 9 is also included, through which the stern tube 1 passes and a coolant 90 is provided between the outer peripheral wall of the stern tube 1 and the inner peripheral wall of the cooling water tank 9 for cooling the stern tube 1, the stern shaft 2 and the lubricating oil.

[0038] In some improvements of this application, the oil inlet 11 is located below the stern tube 1, and the oil outlet 12 is located above the stern tube 1, further promoting the uniform circulation of lubricating oil within the stern tube 1.

[0039] In some improvements of this application, the blade 5 is a helical blade 5, and its helical direction matches the rotation direction of the stern shaft 2, thereby enhancing its effect on the circulation of lubricating oil.

[0040] In some improvements of this application, the inner peripheral wall of the stern tube 1 is also provided with a guide groove for guiding the lubricating oil to flow from front to back. The guide groove can be arranged at intervals with the blade 5 to assist the blade 5 in guiding the flow direction of the lubricating oil and further improve the cooling efficiency.

[0041] In summary, this utility model provides a lubrication and cooling system for a stern tube 1, which uses blades 5 installed inside the stern tube 1 to force the lubricating oil to circulate, effectively reducing the temperature of the front bearing 3 and the rear bearing 4, avoiding local temperature rise, improving cooling efficiency, reducing bearing wear, and extending the overall service life. This application has a simple structure, requires no additional equipment or electricity, can reduce maintenance costs, is easy to manufacture and use, and helps to improve the economic benefits of ships.

[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A stern tube lubrication and cooling system, characterized in that, include: Stern tube, stern shaft, front bearing and rear bearing, The stern tube has an oil inlet and an oil outlet at both ends along the front-to-back direction. The front bearing and the rear bearing are spaced apart in the stern tube and are located between the oil inlet and the oil outlet. The stern shaft passes through the stern tube and is connected to the stern tube through the front bearing and the rear bearing, respectively. A receiving cavity for accommodating lubricating oil is provided between the inner peripheral wall of the stern tube and the outer peripheral wall of the stern shaft. The inner peripheral wall of the stern tube also has protruding blades for guiding the lubricating oil to flow from front to back. The blades are located between the front bearing and the rear bearing.

2. The stern tube lubrication and cooling system as described in claim 1, characterized in that, The inner peripheral wall of the stern tube is provided with a plurality of blades, and each blade is arranged sequentially at intervals along the axial direction of the stern tube.

3. The stern tube lubrication and cooling system as described in claim 2, characterized in that, The blade includes at least two sub-blades, which are equally spaced along the circumference of the stern tube.

4. The stern tube lubrication and cooling system as described in claim 1, characterized in that, The blades are spaced apart from the stern shaft.

5. The stern tube lubrication and cooling system as described in claim 1, characterized in that, The stern tube includes a first bearing housing, a tube body, and a second bearing housing connected sequentially in a front-to-back direction. The front bearing is located in the first bearing housing, and the rear bearing is located in the second bearing housing. The oil inlet is located at the front end of the first bearing housing, and a first sealing assembly is connected between the front end of the first bearing housing and the stern shaft. The oil outlet is located at the rear end of the second bearing housing, and a second sealing assembly is connected between the rear end of the second bearing housing and the stern shaft. The blades are located on the inner circumferential wall of the tube body.

6. The stern tube lubrication and cooling system as described in claim 1, characterized in that, It also includes an oil tank, an oil delivery pipeline and an oil return pipeline. The oil tank is connected to the oil inlet through the oil delivery pipeline and to the oil outlet through the oil return pipeline. The oil tank is also equipped with a conveying component for allowing lubricating oil to flow from the oil return pipeline to the oil delivery pipeline.

7. The stern tube lubrication and cooling system as described in claim 1, characterized in that, It also includes a cooling water tank, the stern tube extends through the cooling water tank, and coolant is provided between the outer peripheral wall of the stern tube and the inner peripheral wall of the cooling water tank.

8. The stern tube lubrication and cooling system as described in claim 1, characterized in that, The oil inlet is located below the stern tube, and the oil outlet is located above the stern tube.

9. The stern tube lubrication and cooling system as described in claim 1, characterized in that, The blade is a helical blade, and its helical direction matches the rotation direction of the stern shaft.

10. The stern tube lubrication and cooling system as described in claim 1, characterized in that, The inner circumferential wall of the stern tube is also provided with a guide groove for guiding the lubricating oil to flow from front to back.

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