Water-lubricated stern bearing supporting device

Abstract

The invention relates to a water-lubricated stern bearing supporting device which comprises a stern bearing support, a water-lubricated stern bearing, a water-lubricated stern bearing, a water-lubricated stern bearing, a water-lubricated stern bearing, a water-lubricated stern bearing, a water-lubricated stern bearing and a water-lubricated stern bearing, the stern bearing is arranged in the stern bearing support and is in interference fit with the stern bearing support, and the upper semicircle of the stern bearing is provided with a radial bearing water inlet hole and a bearing water flowing groove in the length direction; cooling water of a cooling system in the ship body sequentially passes through the vertical water inlet channel, the circumferential water inlet channel, the bearing water inlet hole and the bearing water flowing groove to enter a gap between the stern bearing and the shaft, and lubrication and cooling are achieved. The device is simple and reliable in design and free of environmental pollution, effectively solves the problems that when a ship sails and berths, cooling water of the stern bearing outside the ship body cannot flow, sediment accumulation is easily caused, rotation is caused, and bearing abrasion is accelerated, can greatly prolong the service life and improve the reliability of the stern bearing, and guarantees safe and stable operation of the ship and a propelling system thereof.

Description

Technical Field

[0001] The invention belongs to the field of ship support system design, and in particular relates to a water-lubricated stern bearing support device, which is suitable for various ships with stern bearing support devices arranged outside the hull. Background Art

[0002] In order to meet the requirements of speed, the stern of some ships is narrow, and 1 to 2 pairs of stern bearing support devices need to be installed outside the hull to meet the support requirements of the shaft system. The shaft systems of these ships extend to the outside of the hull after passing through the stern tube of the hull, and then pass through 1 to 2 stern bearing support devices, and finally install the propeller at the end of the shaft system. Water-lubricated stern bearings have the characteristics of simple system and no pollution, and are currently widely used in ship design. In order to ensure the smooth operation of the shaft system, water-lubricated stern bearings are mostly used inside the stern tube and the stern bearing support device.

[0003] Since the bearing in the stern tube is located inside the hull, the filtered cooling water can be directly introduced from the front end of the cabin into the gap between the stern bearing and the shaft system for lubrication and cooling. After the cooling water lubricates and cools the bearing by the pressure of the water pump, it is discharged into the sea from the gap between the rear end of the stern tube bearing and the shaft. Since the stern bearing in the stern bearing support device is located outside the hull, the existing cooling method is to use the inertia of the ship to introduce seawater from the front end of the stern bearing into the gap between the bearing and the shaft system, and discharge it into the sea from the rear end. When the ship is moored, especially in areas with high sediment content such as inland rivers or docks, the bearing cooling water in the stern shaft frame has no power to flow. At the same time, the open structure will have sediment entering the cooling water tank during navigation and mooring, and after a period of time, a large amount of sediment will be deposited in the gap between the stern bearing and the shaft system. When moored for a long time, the gap will even be filled, causing the friction coefficient between the friction surface of the stern bearing and the shaft system to increase, thereby causing the starting torque of the shaft system to increase and accelerate the wear of the stern bearing. Current research mainly focuses on the stern bearing itself, and technical means are used to improve its lubrication performance, but the problems of how to supply treated cooling water to the stern bearing in the stern bearing support device outside the hull, the problem of preventing mud and sand, and the problem of fixing the stern bearing have not yet been solved.

[0004] Therefore, it is urgent to develop a water-lubricated stern bearing support device, which can support and fix the stern bearing while improving the cooling and lubrication conditions of the stern bearing inside the stern bearing support device outside the hull, and solve the cooling water supply problem and the anti-silt problem. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide cooling water that has been filtered and pressurized to the inside of the stern bearing of the stern shaft frame during the navigation and mooring of the ship, so as to ensure the continuous and effective supply of cooling water, improve the lubrication performance, avoid the accumulation of mud and sand that accelerates the wear of the bearing, improve the reliability of the stern bearing, and ensure the normal operation of the propulsion system and the ship.

[0006] To achieve the above object, the technical solution of the present invention is: a water-lubricated stern bearing support device, comprising:

[0007] The stern bearing support has its top end welded to the hull outer plate and is provided with a vertical water inlet channel and a circumferential water inlet channel inside;

[0008] The stern bearing is arranged inside the stern bearing support and has an interference fit with the stern bearing support. The upper semicircle of the stern bearing is provided with a radial bearing water inlet hole and a bearing water flow groove along the length direction.

[0009] The cooling water of the internal cooling system of the hull passes through the vertical water inlet channel, the circumferential water inlet channel, the bearing water inlet hole and the bearing water flow groove in turn, and enters the gap between the stern bearing and the shaft to achieve lubrication and cooling.

[0010] Furthermore, the stern bearing support is an "I"-type or "V"-type structure, the top of its vertical water inlet channel is connected to the cooling water pipeline inside the hull, and the bottom is connected to the circumferential water inlet channel.

[0011] Furthermore, the stern bearing is made of isotropic material to improve wear resistance and impact resistance.

[0012] Furthermore, the stern bearing adopts an integral or horizontally split structure.

[0013] Furthermore, the front and rear ends of the stern bearing are respectively fixedly connected to a front limit ring and a rear limit ring, and the front limit ring and the rear limit ring are provided with circumferential limit keys to prevent the stern bearing from rotating.

[0014] Furthermore, the circumferential limit keys of the front limit ring and the rear limit ring cooperate with the front and rear ends of the bearing water flow groove of the stern bearing to limit the circumferential displacement of the stern bearing.

[0015] Furthermore, the gap between the rear limit ring and the shaft is a cooling water discharge channel, through which the heated cooling water is discharged into the sea.

[0016] Furthermore, the front limiting ring is fixedly connected to a deflector for guiding external seawater.

[0017] Furthermore, a sealing strip is provided at the end of the air guide cover to form a dynamic and static friction sealing pair with the shaft.

[0018] Furthermore, when the ship is moored, the cooling water pump is regularly turned on to flush the gap between the stern bearing and the shaft to remove the deposited sand.

[0019] The beneficial effects of the present invention are:

[0020] In the present invention, the internal cooling system of the hull leads the filtered and increased clean cooling water to the top of the vertical water inlet channel of the stern bearing support. The cooling water enters the gap between the stern bearing and the shaft after passing through the vertical water inlet channel of the stern bearing support, the circumferential water inlet channel of the stern bearing support, the bearing water inlet hole, and the bearing water flow groove in sequence, and keeps flowing to play a role in cooling and lubrication. With the continuous supply of cooling water, the heated cooling water flows out from the gap between the rear limit ring and the shaft into the sea.

[0021] When the ship is running, the shaft system keeps running, the cooling water pump keeps running, and cooling water continuously enters the gap between the stern bearing and the shaft system for cooling and lubrication. When the ship is moored, the shaft system does not run, and the cooling water pump is turned on regularly to flush the bearing gap with filtered cooling water to remove mud and other debris deposited in the gap, so as to avoid an increase in the friction coefficient due to excessive debris, thereby avoiding wear of the bearing.

[0022] The present invention realizes the fixation, water supply cooling and lubrication of the stern bearing outside the hull, and introduces the filtered cooling water into the gap between the stern bearing of the stern shaft bracket and the shaft after being pressurized, thereby ensuring the cooling effect of the stern bearing and avoiding the increase of the friction coefficient between the shaft system and the stern bearing due to the deposition of mud and sand in the gap of the stern bearing during navigation and mooring of the ship, thereby avoiding the rotation and unnecessary wear of the stern bearing, improving the service life and reliability of the stern bearing, and ensuring the safe and stable operation of the propulsion system and the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a longitudinal sectional view of a water-lubricated stern bearing support structure in an embodiment of the present invention;

[0024] Figure 2 is a cross-sectional view of an "I" type water-lubricated stern bearing support structure in an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of a "V" type water-lubricated stern bearing support structure in an embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the front limit ring and the limit key;

[0027] Among them, 1-stern bearing support, 2-vertical water inlet channel, 3-bearing water inlet hole, 4-bearing water flow groove, 5-rear limit ring, 6-front limit ring, 7-guide cover, 8-sealing strip, 9-stern bearing, 10-circumferential water inlet channel, 11-limit key. DETAILED DESCRIPTION

[0028] The following describes the preferred embodiments of the present invention with reference to the drawings in the specification, so that the technical content is clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0029] The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0030] like Figures 1 to 4 As shown, a water-lubricated stern bearing support device proposed in an embodiment of the present invention includes a stern bearing support 1, a vertical water inlet channel 2, a bearing water inlet hole 3, a bearing water flow groove 4, a rear limit ring 5, a front limit ring 6, a guide cover 7, a sealing strip 8, a stern bearing 9, a circumferential water inlet channel 10, and a limit key 11.

[0031] The top of the stern bearing support 1 is welded to the hull outer plate and has an "I" type (see Figure 2 ) and "V" type (see Figure 3 ) two types; a vertical water inlet channel 2 is drilled inside, and a circumferential water inlet channel 10 is bored inside, the top of the vertical water inlet channel 2 is connected to the cooling water pipeline inside the hull, and the bottom is connected to the circumferential water inlet channel 10 of the stern bearing, which is used to introduce the cooling water filtered by the cooling system inside the hull into the bearing water inlet hole 3 of the stern bearing 9. The size of the vertical water inlet channel 2 and the circumferential water inlet channel 10 can be adjusted according to the demand for cooling water.

[0032] The stern bearing 2 is arranged inside the stern bearing support 1, and is an integral type, and has an interference fit with the stern bearing support 1; the stern bearing 2 is made of isotropic and isotropic materials, and the upper semicircle of its body is provided with three radial bearing water inlet holes 3 and three bearing water flow grooves 4 along the length direction, and the top of the bearing water inlet hole 3 is connected with the circumferential water inlet channel 10 of the stern bearing support 1, and the bottom is connected with the bearing water flow groove 4, which is used to introduce cooling water into the gap between the stern bearing 9 and the shaft. The size of the bearing water inlet hole 3 and the bearing water flow groove 4 can be adjusted according to the diameter of the stern bearing.

[0033] The rear limit ring 5 and the front limit ring 6 are arranged at the front and rear ends of the stern bearing, and are fixedly connected to the stern bearing support 1 by bolts to fix the stern bearing 9 to prevent it from moving forward and backward; Figure 4 As shown in (a) and (b), the front limit ring 6 and the rear limit ring 5 are both provided with circumferential limit keys, and the limit keys of the front and rear limit rings respectively cooperate with the front and rear ends of the bearing water flow groove 4 of the stern bearing 9 to prevent the stern bearing 9 from rotating.

[0034] The deflector 7 is fixedly connected to the front limit ring 5 by bolts, which plays a role in guiding the external seawater and reducing resistance; the sealing strip 8 is fixed at the end of the deflector 7 to form a dynamic and static friction sealing pair with the shaft to prevent the external silt-containing seawater from entering the gap between the stern bearing 9 and the shaft.

[0035] When the ship is running, the shaft system keeps running, the cooling water pump keeps running, and the treated cooling water inside the hull is continuously transported to the top of the vertical water inlet channel 2 of the stern bearing support 1. Then the cooling water enters the gap between the stern bearing 9 and the shaft through the vertical water inlet channel 2 of the stern bearing support, the circumferential water inlet channel 10 of the stern bearing support, the bearing water inlet hole 3, and the bearing water flow groove 4 in turn, and keeps flowing, playing a role in cooling and lubrication; with the continuous supply of cooling water, the heated cooling water flows out of the gap between the rear limit ring 5 and the shaft into the sea. The rear limit ring 5 and the front limit ring 6 fix the stern bearing 9 to prevent it from moving forward and backward, and prevent the stern bearing 9 from rotating circumferentially through the limit keys 11 on their end faces. The deflector 7 plays a role in guiding the external seawater to reduce resistance; the sealing strip 8 is fixed at the end of the deflector 7, and forms a dynamic and static friction seal with the shaft to prevent the external silt-containing seawater from entering the gap between the stern bearing 9 and the shaft.

[0036] When the ship is moored, the shaft system does not operate. The cooling water pump is turned on regularly to flush the clearance between the stern bearing and the shaft with filtered cooling water to remove mud and other debris deposited in the clearance, thereby avoiding an increase in the friction coefficient due to excessive debris and thus avoiding bearing wear.

[0037] The present invention provides a water-lubricated stern bearing support device, the core innovations of which are as follows:

[0038] (1) Cooling water supply system: Cooling water inside the hull is introduced into the stern bearing clearance through vertical and circumferential water inlet channels to ensure continuous lubrication and reduce friction during navigation and mooring;

[0039] (2) Anti-sediment design: The sealing strip and the deflector cover work together to prevent sediment from entering; the gaps are regularly flushed when moored to avoid sediment accumulation;

[0040] (3) Limiting structure: The front and rear limiting rings limit the displacement of the stern bearing through the limiting keys, thereby enhancing the stability of the stern bearing and extending its service life.

[0041] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A water-lubricated stern bearing support device, characterized in that: include: The stern bearing support has its top end welded to the hull outer plate and is provided with a vertical water inlet channel and a circumferential water inlet channel inside; The stern bearing is arranged inside the stern bearing support and has an interference fit with the stern bearing support. The upper semicircle of the stern bearing is provided with a radial bearing water inlet hole and a bearing water flow groove along the length direction. The cooling water of the internal cooling system of the hull passes through the vertical water inlet channel, the circumferential water inlet channel, the bearing water inlet hole and the bearing water flow groove in turn, and enters the gap between the stern bearing and the shaft to achieve lubrication and cooling.

2. The water-lubricated stern bearing support device according to claim 1, characterized in that: The stern bearing support is an "I" type or "V" type structure, the top of its vertical water inlet channel is connected to the cooling water pipeline inside the hull, and the bottom is connected to the circumferential water inlet channel.

3. The water-lubricated stern bearing support device according to claim 1, characterized in that: The stern bearing is made of isotropic material to improve wear resistance and impact resistance.

4. The water-lubricated stern bearing support device according to claim 1, characterized in that: The stern bearing adopts an integral structure or a horizontally split structure.

5. The water-lubricated stern bearing support device according to claim 1, characterized in that: The front and rear ends of the stern bearing are respectively fixedly connected to a front limit ring and a rear limit ring, and the front limit ring and the rear limit ring are provided with circumferential limit keys to prevent the stern bearing from rotating.

6. The water-lubricated stern bearing support device according to claim 5, characterized in that: The circumferential limit keys of the front limit ring and the rear limit ring cooperate with the front and rear ends of the bearing water flow groove of the stern bearing to limit the circumferential displacement of the stern bearing.

7. The water-lubricated stern bearing support device according to claim 5, characterized in that: The gap between the rear limit ring and the shaft is a cooling water discharge channel, through which the heated cooling water is discharged into the sea.

8. The water-lubricated stern bearing support device according to claim 5, characterized in that: The front limiting ring is fixedly connected with a deflector cover for guiding external seawater.

9. The water-lubricated stern bearing support device according to claim 8, characterized in that: A sealing strip is arranged at the end of the air guide cover to form a dynamic and static friction sealing pair with the shaft.

10. The water-lubricated stern bearing support device according to claim 1, characterized in that: When the ship is moored, the cooling water pump is opened regularly to flush the gap between the stern bearing and the shaft to remove the deposited sand.

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