A test vessel stern bearing roll-over device and method

Abstract

This invention relates to the field of ship propeller shaft system testing technology, specifically to a test device and method for flipping a ship's stern bearing. It mainly consists of a bearing flipping device base, a bearing flipping device liner, a bearing flipping device handle, and related connecting parts. It is connected to the end faces of the stern bearing at the bow and stern ends, respectively. The stern bearing can be flipped by rotating the bearing flipping device handle, and the upper and lower bearing sleeves of the stern bearing can be lifted using the ring screws on the device. This invention utilizes the principle of relative sliding between the friction pair of a sliding bearing and a supporting shaft to flip the ship's stern bearing on the test platform. It enables rapid flipping of the ship's stern bearing, is easy to operate, and achieves stern bearing flipping without disassembling the test shaft, significantly simplifying the testing process, reducing the lifting work of heavy components, effectively eliminating safety and quality hazards caused by disassembly and assembly, and improving overall testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of ship propeller shaft system testing technology, specifically to a test ship stern bearing overturning device and method. Background Technology

[0002] In traditional ship stern bearing bench tests, the stern bearing needs to be disassembled, measured, and inspected before, during, and after the test. However, there is a lack of specialized tools for flipping and disassembling the stern bearing. Disassembling and flipping the stern bearing is a very complex task in the testing process.

[0003] Existing technologies for testing ship stern bearings on test benches require measuring and inspecting the inside of the stern bearing before reassembling it. This process necessitates disassembling the test bench, and during reassembly, the upper and lower halves of the bushing and slats of the stern bearing must be horizontally inserted into the bearing housing; the stern shaft must be hoisted and horizontally inserted into the stern bearing; the coupling must be reinstalled; loading devices at the bow and stern ends must be installed; and the stern shaft must be readjusted. The entire disassembly and reassembly process is time-consuming and labor-intensive.

[0004] Furthermore, since the bow and stern loading devices, stern shaft, and couplings are all large and complex pieces of equipment, disassembling and hoisting them requires specialized heavy-duty truck cranes and other lifting equipment, which poses significant challenges and risks of impact and damage to the bearing slats. In addition, after reassembling the bearings, the shaft system needs to be realigned, and the entire process from disassembly to reassembly generally takes about five days. Therefore, it is evident that the existing technology for stern bearing testing involves high difficulty, long time commitment, and significant risk. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a test device and method for overturning ship stern bearings, which can simplify the test process of ship stern bearings, shorten the disassembly cycle of stern bearings, improve test efficiency, and improve the safety of the test process, in order to address the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] I. An experimental ship stern bearing overturning device

[0008] This invention provides a test device for reversing a ship stern bearing, used to disassemble the stern bearing to be tested on a ship stern bearing test bench, wherein:

[0009] The ship stern bearing test bench includes a stern loading device 1 and a bow loading device 6. A bearing seat 4 for supporting the stern bearing 5 to be tested is provided between the stern loading device 1 and the bow loading device 6. The stern bearing 5 to be tested is sleeved on the stern shaft 2. The bow end and stern end of the stern shaft 2 pass through the stern loading device 1 and the bow loading device 6 respectively.

[0010] The stern bearing 5 to be tested is composed of an upper bearing sleeve 17 and a lower bearing sleeve 18. The ship stern bearing overturning device is provided in two sets, which are respectively installed at the bow end and stern end of the stern bearing 5 to be tested.

[0011] The ship stern bearing overturning device includes an annular device base 19, an annular device liner 20 is provided on the inner ring of the annular device base 19, the annular device base 19 is formed by connecting an upper half base and a lower half base, the annular device liner 20 is formed by connecting an upper half liner and a lower half liner, device handles 21 are symmetrically provided on both sides of the annular device base 19, and multiple sets of lifting ring devices 25 are provided on the outer ring of the annular device base 19.

[0012] Preferably, the inner wall of the annular device base 19 and the outer wall of the annular device liner 20 are fixedly connected by a first connector 22, and the device handle 21 is fixedly installed at the connection between the upper half base and the lower half base by a third connector 24.

[0013] Preferably, the end face size of the annular device base 19 is adapted to the end face size of the lower bearing sleeve 18, and the end face of the annular device base 19 and the end face of the lower bearing sleeve 18 are fixedly connected by the second connector 23.

[0014] Preferably, the inner diameter of the annular device liner 20 is adapted to the outer diameter of the stern shaft 2, and the annular device liner 20 covers the outer wall of the stern shaft 2 and slides in contact with the stern shaft 2.

[0015] Preferably, the annular device base 19 and device handle 21 are made of Q235B steel, and the annular device liner 20 is made of polytetrafluoroethylene non-metallic material.

[0016] Preferably, the bow end of the stern shaft 2 is sequentially connected to a first coupling 7, a universal coupling 8, a torque meter 9, a first intermediate shaft 11, a second coupling 12, a second intermediate shaft 14, a gearbox 15, and a variable frequency motor 16; a first intermediate bearing 10 is sleeved on the outside of the first intermediate shaft 11, and a second intermediate bearing 13 is sleeved on the outside of the second intermediate shaft 14.

[0017] Preferably, the upper bearing sleeve 17 is provided with a bearing cover 3 at its top.

[0018] II. A method for overturning and disassembling a ship's stern bearing for testing.

[0019] Based on the same inventive concept, the present invention also provides a method for reversing and disassembling a ship stern bearing for testing, employing the ship stern bearing reversing device as described above, specifically including the following steps:

[0020] S1, disassemble and lift out the bearing cover and the upper half bearing sleeve of the stern bearing;

[0021] S2, pass the two sets of ship stern bearing overturning devices through the bow and stern ends of the stern shaft respectively, and fix the corresponding two lower half bases to the bow and stern ends of the lower half bearing sleeve of the stern bearing respectively.

[0022] S3, perform the flipping operation of the lower half bearing sleeve of the stern bearing, so that it flips from the bottom of the stern shaft to the top of the stern shaft;

[0023] S4, disassemble the upper and lower halves of the base and the upper and lower halves of the inner lining of the ship's stern bearing tilting device;

[0024] S5, the lower half of the stern bearing sleeve, the lower half of the base, and the lower half of the inner liner are lifted out together by the lifting ring device on the lower half of the base.

[0025] Furthermore, in step S2, the annular inner linings of the two sets of ship stern bearing overturning devices respectively cover the bow end and stern end of the stern shaft and slide in contact with the outer wall of the stern shaft.

[0026] Furthermore, in step S2, the lower half of the base is fixedly connected to the corresponding lower half of the inner liner by countersunk hexagonal screws.

[0027] Compared with the prior art, the present invention has the following main advantages:

[0028] 1. The test ship stern bearing flipping device of the present invention utilizes the principle of relative sliding between the friction pair of the sliding bearing and the support shaft to flip the ship stern bearing on the test platform. It can achieve rapid flipping of the ship stern bearing, and is easy to operate. It does not require disassembling too many parts, which can shorten the stern bearing disassembly cycle and improve the overall test efficiency.

[0029] 2. The present invention provides a method for reversing and disassembling a test ship stern bearing, which enables the stern bearing to be reversed without removing the test shaft during the test process. This greatly simplifies the test process, reduces the lifting work of heavy components, and effectively eliminates safety and quality hazards caused by disassembly and assembly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the stern bearing test bench in an embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional view of the stern bearing in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the assembly of the stern bearing tilting device in an embodiment of the present invention;

[0033] Figure 4This is a schematic diagram of the base of the ring-shaped device in an embodiment of the present invention;

[0034] Figure 5 for Figure 4 Schematic diagram of section AA;

[0035] Figure 6 This is a schematic diagram of the inner lining of the annular device in an embodiment of the present invention;

[0036] Figure 7 for Figure 6 Schematic diagram of the BB section;

[0037] Figure 8 This is a schematic diagram of the device handle in an embodiment of the present invention;

[0038] Figure 9 This is a cross-sectional view of the stern bearing after the bearing flipping device is installed in an embodiment of the present invention.

[0039] In the diagram: 1. Stern loading device; 2. Stern shaft; 3. Bearing cover; 4. Bearing housing; 5. Stern bearing to be tested; 6. Bow loading device; 7. First coupling; 8. Universal coupling; 9. Torque meter; 10. First intermediate bearing; 11. First intermediate shaft; 12. Second coupling; 13. Second intermediate bearing; 14. Second intermediate shaft; 15. Gearbox; 16. Variable frequency motor; 17. Upper bearing sleeve; 18. Lower bearing sleeve; 19. Annular device base; 20. Annular device liner; 21. Device handle; 22. First connecting piece; 23. Second connecting piece; 24. Third connecting piece; 25. Lifting ring device. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0041] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0042] Example 1: This example provides a test ship stern bearing flipping device for disassembling the stern bearing to be tested on the ship stern bearing test bench.

[0043] like Figure 1As shown, the ship stern bearing test bench mainly consists of a stern loading device 1, a bearing housing 4, a bow loading device 6, a first coupling 7, a universal joint 8, a torque meter 9, a first intermediate bearing 10, a first intermediate shaft 11, a second coupling 12, a second intermediate bearing 13, a second intermediate shaft 14, a gearbox 15, and a variable frequency motor 16.

[0044] Specifically, the ship stern bearing test bench includes a stern loading device 1 and a bow loading device 6. A bearing seat 4 for supporting the stern bearing 5 to be tested is provided between the stern loading device 1 and the bow loading device 6. The stern bearing 5 to be tested is sleeved on the stern shaft 2. The bow end and stern end of the stern shaft 2 pass through the stern loading device 1 and the bow loading device 6 respectively.

[0045] The bow end of the stern shaft 2 is sequentially connected to a first coupling 7, a universal coupling 8, a torque meter 9, a first intermediate shaft 11, a second coupling 12, a second intermediate shaft 14, a gearbox 15, and a variable frequency motor 16; a first intermediate bearing 10 is sleeved on the outside of the first intermediate shaft 11, and a second intermediate bearing 13 is sleeved on the outside of the second intermediate shaft 14.

[0046] like Figure 2 As shown, the stern bearing 5 to be tested is sleeved on the stern shaft 2, and is specifically composed of a bearing cover 3, an upper half bearing sleeve 17 and a lower half bearing sleeve 18.

[0047] Specifically, the upper bearing sleeve 17 is provided with a bearing cover 3 on its top, and the ship stern bearing overturning device is provided in two sets, which are respectively installed at the bow end and stern end of the stern bearing 5 to be tested.

[0048] like Figures 3-9 As shown, the ship stern bearing overturning device mainly consists of a bearing overturning device base 19, a bearing overturning device liner 20, a bearing overturning device handle 21, a first connecting part 22 (M10×30 socket head cap screw), a second connecting part 23 (M16×60 socket head cap screw), a third connecting part 24 (M16×55 socket head cap screw), and a lifting ring device 25 (M20×30 ring screw).

[0049] Specifically, the ship stern bearing overturning device includes an annular device base 19, an annular device liner 20 is provided on the inner ring of the annular device base 19, the annular device base 19 is formed by connecting an upper half base and a lower half base, the annular device liner 20 is formed by connecting an upper half liner and a lower half liner, device handles 21 are symmetrically provided on both sides of the annular device base 19, and multiple sets of lifting ring devices 25 are provided on the outer ring of the annular device base 19.

[0050] Furthermore, the inner wall of the annular device base 19 is fixedly connected to the outer wall of the annular device liner 20 via a first connector 22, and the device handle 21 is fixedly installed at the connection between the upper and lower half-bases via a third connector 24.

[0051] Furthermore, the end face size of the annular device base 19 is adapted to the end face size of the lower bearing sleeve 18, and the end face of the annular device base 19 and the end face of the lower bearing sleeve 18 are fixedly connected by the second connector 23.

[0052] Furthermore, the inner diameter of the annular device liner 20 is adapted to the outer diameter of the stern shaft 2, and the annular device liner 20 covers the outer wall of the stern shaft 2 and slides in contact with the stern shaft 2.

[0053] The bearing tilting device base 19 and the bearing tilting device handle 21 are made of Q235B steel to meet the rigidity and strength requirements of the components under the bearing tilting condition; the bearing tilting device liner 20 is made of polytetrafluoroethylene non-metallic material with low friction coefficient, low hardness and self-lubricating function to meet the good friction performance requirements of the friction surface under the bearing tilting condition, so as to ensure that the stern shaft is not damaged.

[0054] Example 2: This example provides a test ship stern bearing overturning device, which mainly consists of a bearing overturning device base, a bearing overturning device liner, a bearing overturning device handle, and related connecting parts. It is connected to the end face of the stern bearing at the bow and stern ends, respectively. The stern bearing can be overturned by rotating the bearing overturning device handle, and the upper and lower bearing sleeves of the stern bearing can be lifted by the ring lifting screw on the device.

[0055] The ship's stern bearing overturning device shown has two sets, which are used in pairs. One set is arranged at the bow and the other at the stern, and is connected to the stern bearing sandwiched between them by lateral threads. At the same time, the stern bearing overturning device also wraps around the stern shaft, so that the inner lining of the bearing overturning device and the stern shaft form a new sliding friction pair.

[0056] During the flipping process, the weight of the lower half of the stern bearing sleeve is transferred to the inner liner of the bearing flipping device through the connecting thread. By rotating the handle of the bearing flipping device, the lower half of the stern bearing sleeve can be rotated from the bottom to the top through the sliding friction pair. Then, the lower half of the stern bearing sleeve is hoisted to the designated location through the ring lifting screw on the device.

[0057] Example 3, based on the same inventive concept, also provides a method for overturning and disassembling a test ship stern bearing, using the ship stern bearing overturning device described above, specifically including the following steps:

[0058] S1, disassemble and lift away the bearing cover 3 and the upper half bearing sleeve 17 of the stern bearing;

[0059] S2, raise the stern shaft 2 to a preset height, and install a bearing flipping device at each of the bow and stern ends of the lower half bearing sleeve 18 of the stern bearing. The bearing flipping device base 19 is connected to the lower half bearing sleeve 18 of the stern bearing through the second connector 23. At the same time, the inner surface of the bearing flipping device liner 20 surrounds the outer surface of the stern shaft 2 to form a rotary sliding friction pair.

[0060] S3, apply a rotational torque to the bearing flipping device handle 21 of the stern bearing flipping device, so that the lower half bearing sleeve 18 of the stern bearing flips from the bottom of the stern shaft to the top of the stern shaft, loosen the upper half bearing of the bearing flipping device, and lift the lower half bearing sleeve 18 of the stern bearing flipping device out through the ring lifting screw on the stern bearing flipping device.

[0061] Furthermore, when reinstalling a ship's stern bearing, the principle of flipping the lower half of the stern bearing sleeve from the top of the stern shaft to the bottom of the stern shaft is the same as the principle of flipping and removing the lower half of the stern bearing sleeve, but the steps are reversed.

[0062] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0063] In summary:

[0064] 1. The test ship stern bearing flipping device of the present invention utilizes the principle of relative sliding between the friction pair of the sliding bearing and the support shaft to flip the ship stern bearing on the test platform. It can achieve rapid flipping of the ship stern bearing, and is easy to operate. It does not require disassembling and assembling too many parts, which can shorten the disassembly and assembly cycle of the stern bearing and improve the overall test efficiency.

[0065] 2. The present invention provides a method for reversing and disassembling a test ship stern bearing, which enables the stern bearing to be reversed without removing the test shaft during the test process. This greatly simplifies the test process, reduces the lifting work of heavy components, and effectively eliminates safety and quality hazards caused by disassembly and assembly.

[0066] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A test device for reversing a ship's stern bearing, used to disassemble the stern bearing to be tested on a ship's stern bearing test bench, characterized in that, The ship stern bearing test bench includes a stern loading device (1) and a bow loading device (6). A bearing seat (4) for supporting the stern bearing (5) to be tested is provided between the stern loading device (1) and the bow loading device (6). The stern bearing (5) to be tested is sleeved on the stern shaft (2). The bow end and stern end of the stern shaft (2) pass through the stern loading device (1) and the bow loading device (6) respectively. The stern bearing (5) to be tested is composed of an upper bearing sleeve (17) and a lower bearing sleeve (18). The ship stern bearing overturning device is provided in two sets, which are respectively installed at the bow end and stern end of the stern bearing (5) to be tested. The ship stern bearing overturning device includes an annular device base (19), the inner ring of the annular device base (19) is provided with an annular device liner (20), the annular device base (19) is formed by connecting an upper half base and a lower half base, the annular device liner (20) is formed by connecting an upper half liner and a lower half liner, the annular device base (19) is symmetrically provided with device handles (21) on both sides, and the outer ring of the annular device base (19) is provided with multiple sets of lifting ring devices (25). The inner wall of the annular device base (19) is fixedly connected to the outer wall of the annular device liner (20) by a first connector (22), and the device handle (21) is fixedly installed at the connection between the upper half base and the lower half base by a third connector (24). The end face size of the annular device base (19) is adapted to the end face size of the lower half bearing sleeve (18), and the end face of the annular device base (19) and the end face of the lower half bearing sleeve (18) are fixedly connected by the second connector (23). The inner diameter of the annular device liner (20) is adapted to the outer diameter of the stern shaft (2), and the annular device liner (20) covers the outer wall of the stern shaft (2) and slides in contact with the stern shaft (2).

2. The experimental ship stern bearing overturning device according to claim 1, characterized in that, The base (19) and handle (21) of the annular device are made of Q235B steel, and the liner (20) of the annular device is made of polytetrafluoroethylene non-metallic material.

3. The experimental ship stern bearing overturning device according to claim 1, characterized in that, The bow end of the stern shaft (2) is sequentially connected to a first coupling (7), a universal coupling (8), a torque meter (9), a first intermediate shaft (11), a second coupling (12), a second intermediate shaft (14), a gearbox (15), and a variable frequency motor (16); the first intermediate shaft (11) is fitted with a first intermediate bearing (10), and the second intermediate shaft (14) is fitted with a second intermediate bearing (13).

4. The experimental ship stern bearing overturning device according to claim 1, characterized in that, The upper bearing sleeve (17) is provided with a bearing cap (3) on top.

5. A method for reversing and disassembling a test ship stern bearing, employing the ship stern bearing reversing device as described in any one of claims 1 to 4, characterized in that, Includes the following steps: S1, disassemble and lift out the bearing cover and the upper half bearing sleeve of the stern bearing; S2, pass the two sets of ship stern bearing overturning devices through the bow and stern ends of the stern shaft respectively, and fix the corresponding two lower half bases to the bow and stern ends of the lower half bearing sleeve of the stern bearing respectively. S3, perform the flipping operation of the lower half bearing sleeve of the stern bearing, so that it flips from the bottom of the stern shaft to the top of the stern shaft; S4, disassemble the upper and lower halves of the base and the upper and lower halves of the inner lining of the ship's stern bearing tilting device; S5, the lower half of the stern bearing sleeve, the lower half of the base, and the lower half of the inner liner are lifted out together by the lifting ring device on the lower half of the base.

6. A method for overturning and disassembling a test ship stern bearing according to claim 5, characterized in that... In step S2, the annular inner linings of the two sets of ship stern bearing overturning devices respectively cover the bow end and stern end of the stern shaft and slide in contact with the outer wall of the stern shaft.

7. A method for overturning and disassembling a test ship stern bearing according to claim 5, characterized in that... In step S2, the lower half of the base is fixedly connected to the corresponding lower half of the inner liner by countersunk hexagonal screws.

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