An adaptive water-lubricated stern bearing

Abstract

The invention discloses an adaptive water-lubricated stern bearing, which belongs to the technical field of ship shafting. The bearing includes a stern stop ring, a bushing, a split upper bearing shell, a bow stop ring, a stop device, a split lower bearing shell and an elastic adaptive layer; the split upper bearing shell and the split lower bearing shell are installed in the bushing, and the upper and lower bearing shells are connected into a complete tubular structure through a stop device, and an elastic adaptive layer is arranged between the lower bearing shell and the bushing; the bow stop ring and the stern stop ring are respectively arranged at the bow and stern ends of the bushing to limit the axial stringing of the split bearing shell, and a rubber layer is vulcanized on the pressing surface of the bow stop ring and the stern stop ring; the stop screw is screwed into the bushing from the outside and fixes the stop device. The invention can eliminate the local load-bearing state of the stern bearing shell, so that the stern bearing has good wear and friction characteristics, and at the same time can effectively isolate the excitation vibration during the operation of the shafting system, reduce the transmission of the shafting vibration, and achieve good submarine quiet performance.

Description

Technical Field

[0001] The invention belongs to the technical field of ship shafting, and in particular relates to an adaptive water-lubricated stern bearing. Background Art

[0002] The water-lubricated bearings of the ship's shafting are arranged at the stern of the submarine structure. The typical arrangement is as follows: Figure 1 As shown in the figure, in the traditional shafting arrangement, the stern bearing is installed on the fixed hull structure, supporting the weight of the main shaft and outboard propeller. Due to the heavy weight of the propeller, a weight cantilever effect will be generated, causing the stern bearing to be in an inclined load-bearing state during actual operation. Figure 2 As shown in the figure, after the stern bearing and the shaft system are installed, there is an initial tilt angle α between the main shaft and the stern bearing. At this time, the stern end of the stern bearing is in a local load state of high specific pressure bearing. The load borne locally at the stern end of the stern bearing is too large, resulting in excessive bearing friction during operation. Excessive local bearing friction increases the transitional wear of the bearing shell on the one hand, and easily generates friction noise on the other hand, affecting the acoustic stealth performance of the submarine stern shaft system. Summary of the invention

[0003] In view of this, the present invention provides an adaptive water-lubricated stern bearing, which can eliminate the local load-bearing state of the stern bearing bushing, so that the stern bearing has good wear and friction characteristics. At the same time, it can effectively isolate the excitation vibration during the operation of the shaft system, reduce the transmission of the shaft system vibration, and achieve good submarine quiet performance.

[0004] An adaptive water-lubricated stern bearing comprises a stern stop ring, a bushing, a split upper bearing shell, a bow stop ring, a stop device, a split lower bearing shell and an elastic adaptive layer;

[0005] A split upper bearing and a split lower bearing are installed on the upper and lower sides of the bushing respectively. The split upper bearing and the split lower bearing are connected into a complete tubular structure through a stopping device, and an elastic adaptive layer is arranged between the split lower bearing and the bushing; a bow stop ring and a stern stop ring are respectively arranged at the bow and stern ends of the bushing to limit the axial movement of the split bearing, and a rubber layer is vulcanized on the clamping surfaces of the bow stop ring and the stern stop ring; a screw hole is arranged on the outer side of the bearing bushing, and a stop screw is screwed into the bushing from the outer side to fix the stop device.

[0006] Furthermore, the split lower bearing and the outer elastic adaptive layer are connected together by vulcanization or bonding. When the split lower bearing bears the weight of the shaft system cantilever load, the elastic adaptive layer undergoes adaptive deformation.

[0007] Furthermore, the assembly surfaces of the stopper and the split upper and lower bearings are perpendicular right angles to each other, which ensures the stability of the upper and lower bearings while allowing the split lower bearing to move downward during adaptive deformation.

[0008] Furthermore, the stopping device includes a fixing plate, a clamping plate, a locking block and a locking bolt; the fixing plate is fastened to the inner wall of the bushing by a stopping screw extending from the back of the bushing, and the joining surface between the clamping plate and the fixing plate is an inclined structure. After the clamping plate is adjusted into place, the locking bolt fixes the locking block to the fixing plate and the clamping plate at the same time, forming a stopping device with an integrated structure.

[0009] Furthermore, a matching structure of ridges and grooves is designed on the joint surface of the clamping plate and the fixing plate.

[0010] Beneficial effects:

[0011] 1. An elastic adaptive layer is arranged on the outer side of the split lower bearing shell of the stern bearing of the present invention. When the lower bearing shell bears the weight of the vertical shaft system and is affected by the weight effect of the cantilever load, the elastic adaptive layer at the bottom can deform to adapt to the cantilever inclination angle, so that the main shaft can be well fitted in the entire length direction of the stern bearing, eliminating the local load-bearing state of the stern bearing shell, so that the stern bearing has good wear and friction characteristics. At the same time, the elastic adaptive layer can isolate the excitation vibration during the operation of the shaft system, reduce the transmission of the shaft system vibration, and achieve good submarine quiet performance.

[0012] 2. The compression surfaces of the bow stop ring and the stern stop ring of the present invention are vulcanized with a rubber layer. While providing axial stops to the bearing, the elastic rubber layer can adapt to a small displacement of the split lower bearing during adaptive deformation.

[0013] 3. The split adaptive lower bearing of the present invention can achieve a load-balancing effect in the cantilever load state of the shaft system, reduce the local load-bearing specific pressure at the stern end of the stern bearing, reduce the amount of bearing wear and the friction excitation noise during bearing operation, improve the friction performance of the stern bearing bearing, and increase the operating life of the stern bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the layout of a typical water-lubricated stern bearing;

[0015] Figure 2 This is a schematic diagram of the load-bearing state of the stern bearing;

[0016] Figure 3 It is a schematic diagram of the overall structure of the adaptive water-lubricated stern bearing of the present invention;

[0017] Figure 4 A schematic diagram of the structure of the stop device;

[0018] Figure 5 for Figure 4 AA section view.

[0019] Among them, 1-stern stop ring, 2-bushing, 3-split upper bearing, 4-bow stop ring, 5-stop device, 6-split lower bearing, 7-elastic adaptive layer, 8-fixing plate, 9-pressure plate, 10-locking block, 11-locking bolt. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0021] The present invention provides an adaptive water-lubricated stern bearing, as shown in the attached Figure 3 As shown, the bearing includes a stern bearing stern stop ring 1, a stern bearing bushing 2, a split upper bearing shell 3, a bow stop ring 4, a stopping device 5, a split lower bearing shell 6, and an elastic adaptive layer 7, wherein the stopping device assembly includes a fixing plate 8, a clamping plate 9, a locking plate 10 and a locking bolt 11.

[0022] The bushing 2 is a supporting structure of the stern bearing, supporting the internal split upper bearing 3, split lower bearing 6 and elastic adaptive layer 7. The bow and stern ends of the bushing 2 are respectively provided with a bow stop ring 4 and a stern stop ring 1 to prevent axial movement of the bearing in the bushing 2. The back of the bushing 2 is fixed with a stop device 5 by a fastening screw.

[0023] The bow stop ring 4 and the stern stop ring 1 are fastened to the bushing 2 through the mounting bolt holes, and a rubber layer is vulcanized on the inner compression surface thereof. While providing axial stops for the bearing, the elastic rubber layer can adapt to a small displacement of the split lower bearing 6 during adaptive deformation.

[0024] The stern bearing bushing is composed of a split upper bushing 3 and a split lower bushing 6. The split upper bushing is a single-layer structure and is fixed in the stern bearing sleeve 2. The split lower bushing is made of the same material as the upper bushing and is a friction pair that contacts the main shaft. An elastic adaptive layer 7 is provided on the outside. The double-layer structure composed of the split lower bushing 6 and the elastic adaptive layer 7 is fixed in the stern bearing sleeve 2.

[0025] As attached Figure 4 As shown, in the stopper 5, the fixing plate 8 is fastened to the inner wall of the bushing 2 by the fixing screws extending into the back of the bushing, and the joint surface of the clamping plate 9 and the fixing plate 8 is a slope structure. The convex ridge and groove structure designed on the joint surface ensures the guiding property of the clamping process. Figure 5 As shown, the structure adjusts the gap between the stern bearing bushing and the bushing by adjusting the relative positions of the clamping plate 9 and the fixing plate 8.

[0026] When the clamping plate 9 is installed in place, the locking bolt 11 fixes the locking block 10 on the fixing plate 8 and the clamping plate 9 at the same time, forming an integrated stopping device 5. The stopping device and the bearing assembly surface are perpendicular right-angled sides to each other, which ensures the stability of the upper and lower bearings while allowing the lower bearing to move downward during adaptive deformation.

[0027] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive water-lubricated stern bearing, characterized in that: It includes a stern stop ring, a bushing, a split upper bearing, a bow stop ring, a stop device, a split lower bearing and an elastic adaptive layer; A split upper bearing and a split lower bearing are installed on the upper and lower sides of the bushing, respectively. The split upper bearing and the split lower bearing are connected into a complete tubular structure through a stop device. An elastic adaptive layer is arranged between the split lower bearing and the bushing; a bow stop ring and a stern stop ring are arranged at the bow and stern ends of the bushing to limit the axial stringing of the split bearing, and a rubber layer is vulcanized on the pressing surface of the bow stop ring and the stern stop ring; a screw hole is arranged on the outer side of the bearing bushing, and a stop screw is screwed into and fixed by the stop device from the outer side of the bushing; the assembly surfaces of the stop device and the split upper bearing and the split lower bearing are mutually perpendicular right-angled sides, which can allow the split lower bearing to move downward during adaptive deformation while ensuring the stability of the upper and lower bearings; The stopping device includes a fixing plate, a clamping plate, a locking block and a locking bolt; the fixing plate is fastened to the inner wall of the bushing by a stopping screw extending from the back of the bushing, and the joining surface of the clamping plate and the fixing plate is an inclined structure. After the clamping plate is adjusted into place, the locking bolt fixes the locking block to the fixing plate and the clamping plate at the same time, forming a stopping device with an integrated structure.

2. The adaptive water-lubricated stern bearing according to claim 1, characterized in that: The split lower bearing shell and the outer elastic adaptive layer are connected together by vulcanization or bonding. When the split lower bearing shell bears the weight of the shaft system cantilever load, the elastic adaptive layer undergoes adaptive deformation.

3. An adaptive water-lubricated stern bearing according to claim 2, characterized in that: The joint surfaces of the pressing plate and the fixing plate are designed with a matching structure of ridges and grooves.

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