Grinding device for online maintenance of ship stern shaft moving ring

Abstract

The invention relates to the technical field of cutting, and provides a grinding device for online maintenance of a ship stern shaft moving ring, the stern shaft is sleeved with the moving ring, and the moving ring is provided with a to-be-ground surface; the grinding device for online maintenance of the ship stern shaft moving ring comprises a fixed part, a rotating part, a grinding assembly and a driving mechanism, the fixed part is annularly arranged on a stern shaft, and a distance exists between the fixed part and a to-be-ground surface; the rotating piece is rotationally connected to the side, close to the to-be-ground face, of the fixing piece, and the rotating piece can rotate around the axis of the fixing piece; the grinding assembly comprises a grinding head and a driving part, the fixed end of the driving part is connected with the rotating part, and the grinding head makes contact with the to-be-ground surface; the driving end of the driving mechanism is connected with the rotating piece. On-line maintenance can be directly carried out when the ship sails or stops, the moving ring does not need to be disassembled, operation is convenient, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of cutting technology, and in particular to a grinding device for online maintenance of the dynamic ring of a ship stern shaft. Background Art

[0002] As an important tool for water transportation, the safe and stable operation of a ship is crucial. The stern shaft mechanical seal device, as a key component in the ship's power system, undertakes the important task of preventing seawater from entering the hull interior and protecting the stern shaft and bearings from corrosion and wear. However, during long-term navigation, the friction surface of the dynamic ring of the stern shaft (i.e., the dynamic ring of the stern shaft mechanical seal device) is prone to excessive wear or local wear due to continuous friction and abrasion.

[0003] Currently, the maintenance of the ship stern shaft mechanical seal device usually needs to be carried out after the ship docks. Maintenance personnel complete the maintenance work through steps such as disassembling the dynamic ring of the stern shaft, inspecting the wear condition, and replacing or repairing the worn components. However, the maintenance timing is limited and the maintenance cost is high. Summary of the Invention

[0004] The present invention provides a grinding device for online maintenance of the dynamic ring of a ship stern shaft to solve the problems in the prior art that the ship stern shaft mechanical seal device needs to be disassembled and maintained after the ship docks, the maintenance timing is limited, and the maintenance cost is high.

[0005] The present invention provides a grinding device for online maintenance of the dynamic ring of a ship stern shaft. A dynamic ring is sleeved on the stern shaft, and the dynamic ring has a surface to be ground; the grinding device for online maintenance of the dynamic ring of a ship stern shaft includes: a fixing member, which is annularly arranged around the stern shaft and has a spacing from the surface to be ground; a rotating member, which is rotatably connected to one side of the fixing member close to the surface to be ground and can rotate around the axis of the fixing member; a grinding assembly, including a grinding head and a driving member, the fixed end of the driving member is connected to the rotating member, and the grinding head contacts the surface to be ground; a driving mechanism, the driving end of which is connected to the rotating member.

[0006] According to the grinding device for online maintenance of the dynamic ring of a ship stern shaft provided by the present invention, it further includes an elastic pressing member, the grinding assembly is connected to the rotating member through the elastic pressing member and can expand and contract between the grinding assembly and the rotating member.

[0007] According to the grinding device for online maintenance of the dynamic ring of a ship stern shaft provided by the present invention, it further includes an adjusting member, the adjusting member is arranged on the rotating member, one end of the elastic pressing member away from the grinding assembly is connected to the adjusting member, and the adjusting member is used to adjust the position of the grinding assembly in the radial direction of the dynamic ring.

[0008] A grinding device for on-line maintenance of the dynamic ring of a ship's stern shaft provided by the present invention, wherein the adjusting member is slidably connected to the rotating member, and the adjusting member can move between the outer edge of the rotating member and the outer wall surface of the stern shaft.

[0009] A grinding device for on-line maintenance of the dynamic ring of a ship's stern shaft provided by the present invention further includes a locking member. A through hole is provided on the rotating member, and a limiting ring is provided on the adjusting member. After the adjusting member moves to the target position, the locking member passes through the limiting ring and is inserted into the through hole.

[0010] A grinding device for on-line maintenance of the dynamic ring of a ship's stern shaft provided by the present invention, wherein the rotating member is an annular rotating member.

[0011] A grinding device for on-line maintenance of the dynamic ring of a ship's stern shaft provided by the present invention further includes a locking assembly. The locking assembly includes a locking member that passes through the fixing member. By rotating the locking member, the end face of the locking member abuts against or separates from the outer wall surface of the stern shaft.

[0012] A grinding device for on-line maintenance of the dynamic ring of a ship's stern shaft provided by the present invention, wherein the locking assembly further includes an abutting member provided at the end of the locking member and located inside the fixing member.

[0013] A grinding device for on-line maintenance of the dynamic ring of a ship's stern shaft provided by the present invention, wherein the locking assembly further includes a measuring scale, and the end of the measuring scale is fixed to the abutting member and located outside the fixing member.

[0014] A grinding device for on-line maintenance of the dynamic ring of a ship's stern shaft provided by the present invention, wherein there are multiple locking assemblies, and the multiple locking assemblies are arranged at intervals along the circumferential direction of the fixing member.

[0015] The grinding device for on-line maintenance of the dynamic ring of a ship's stern shaft provided by the present invention ensures the stability of the device during the grinding process by arranging the fixing member around the stern shaft, with the fixing member located on one side of the surface to be ground on the dynamic ring and maintaining a certain distance from the surface to be ground. The driving mechanism is connected to the rotating member, driving the rotating member to drive the grinding assembly to rotate around the axis of the stern shaft, ensuring that the grinding assembly can evenly grind the entire surface to be ground of the dynamic ring during the grinding process, ensuring that the flatness and smoothness of the surface of the dynamic ring meet the target requirements, and reducing the operation risk of the ship. The present invention can directly perform on-line maintenance when the ship is sailing or docked, without disassembling the dynamic ring, which is convenient to operate and reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is the front view of the grinding device provided by the present invention for on-line maintenance of the dynamic seal ring of the ship stern shaft.

[0018] Figure 2 It is the right view of the grinding device provided by the present invention for on-line maintenance of the dynamic seal ring of the ship stern shaft.

[0019] Figure 3 It is the structural schematic diagram of the locking assembly provided by the present invention.

[0020] Reference numerals: 1, stern shaft; 2, dynamic seal ring; 3, fixing member; 4, rotating member; 5, grinding assembly; 51, grinding head; 52, driving member; 6, driving mechanism; 7, elastic pressing member; 8, adjusting member; 9, locking assembly; 91, locking member; 92, abutting member; 93, measuring scale; 94, limiting member. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention with reference to the drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0023] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the embodiments of the present invention and for simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present invention.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0025] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation on the present invention.

[0026] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the applicability of other processes and / or the use of other materials.

[0027] The following will be combined with Figures 1 - 3 to describe a grinding device for on-line maintenance of the dynamic seal ring of a ship's stern shaft according to the present invention.

[0028] A dynamic seal ring 2 is sleeved on a stern shaft 1, and the dynamic seal ring 2 forms a synchronous rotation connection with the stern shaft 1 through fastening elements. In actual navigation conditions, due to the long-term alternating load and seawater corrosion on the stern shaft 1, the surface of the dynamic seal ring 2 is prone to uneven wear after friction. The surface of the dynamic seal ring 2 where uneven wear occurs is the surface to be repaired, that is, the surface to be ground. The dynamic seal ring 2 is made of cemented carbide material, and the roughness requirement of the friction surface is below Ra0.8.

[0029] As Figure 1As shown in the figure, the grinding device for online maintenance of the dynamic ring of a ship's stern shaft provided by an embodiment of the present invention includes: a fixing member 3, a rotating member 4, a grinding assembly 5, and a driving mechanism 6.

[0030] The fixing member 3 can be of an annular structure. The fixing member 3 is arranged around the stern shaft 1, coaxially with the stern shaft 1, on one side of the surface to be ground on the dynamic ring 2, and there is a spacing between it and the surface to be ground. In one embodiment, a keyway is provided on one of the outer wall surfaces of the fixing member 3 and the stern shaft 1, and a key is provided on the other. The fixing member 3 is fixedly connected to the stern shaft 1 by inserting the key. In another embodiment, the fixing member 3 and the outer wall surface of the stern shaft 1 are connected by an interference fit method, and the fixing member 3 is fixed to the stern shaft 1 through pressure; for example, the locking member 91 passes through the fixing member 3 and abuts against the outer wall surface of the stern shaft 1. The locking member 91 can be a bolt, and the bolt abuts against and separates from the outer wall surface of the stern shaft 1 by rotation to achieve fixation and disassembly.

[0031] The rotating member 4 is rotatably connected to the side of the fixing member 3 close to the surface to be ground. The rotating member 4 can rotate around the axis of the fixing member 3, that is, around the axis of the stern shaft 1. In one embodiment, bearings are provided on the fixing member 3. Due to the support and rotation ability of the bearings, the rotating member 4 can rotate around the axis of the fixing member 3. The rolling ability of the bearings reduces the friction force, enabling the rotating member 4 to rotate smoothly relative to the fixing member 3. In another embodiment, a slide rail, a chute, etc. are provided between the fixing member 3 and the rotating member 4, enabling the rotating member 4 to rotate freely under the restriction of the fixing member 3. The rotating member 4 and the fixing member 3 can also be connected by a coupling. The coupling can connect two rotating parts and transmit the driving torque at the same time, enabling the rotating member 4 to rotate relative to the fixing member 3. It should be noted that the rotating member 4 can be an annular rotating member. The annular rotating member is sleeved on the stern shaft 1, and there is a spacing between the inner wall surface of the annular rotating member and the outer wall surface of the stern shaft 1 to prevent the outer wall surface of the stern shaft 1 from being worn during the rotation of the annular rotating member. The rotating member 4 can also be a rectangular, circular, elliptical, special-shaped structural member, etc. The rotating member 4 can be rotatably connected to the fixing member 3 according to the actual structure.

[0032] The grinding assembly 5 is arranged between the surface to be ground and the fixing member 3. The grinding assembly 5 includes a grinding head 51 and a driving member 52. The fixed end of the driving member 52 is connected to the rotating member 4. The grinding head 51 contacts the surface to be ground. When the driving member 52 is started, it drives the grinding head 51 to rotate, grind the surface to be ground, remove the worn or uneven parts on the surface of the dynamic ring 2, and make it meet the target requirements. The driving end of the driving mechanism 6 is connected to the rotating member 4. The driving mechanism 6 drives the rotating member 4 to drive the grinding assembly 5 to rotate around the axis of the fixing member 3 (the axis of the stern shaft 1), ensuring the uniformity and stability during the grinding process, enabling the entire dynamic ring 2 to be comprehensively ground, and improving the grinding efficiency and effect. The fixed end of the driving mechanism 6 can be arranged on the fixing member 3.

[0033] The grinding device for on-line maintenance of the moving ring of a ship's stern shaft provided by the embodiment of the present invention ensures the stability of the device during the grinding process by arranging the fixing member 3 around the stern shaft 1. The fixing member 3 is located on one side of the surface to be ground of the moving ring 2 and maintains a certain distance from the surface to be ground. The driving mechanism 6 is connected to the rotating member 4, and drives the rotating member 4 to drive the grinding assembly 5 to rotate around the axis of the stern shaft 1, ensuring that the grinding assembly 5 can evenly grind the entire surface to be ground of the moving ring 2 during the grinding process, ensuring that the flatness and smoothness of the surface of the moving ring 2 meet the target requirements and reducing the operation risk of the ship. The present invention can directly perform on-line maintenance when the ship is sailing or docked, without disassembling the moving ring 2, which is convenient to operate and reduces the maintenance cost.

[0034] In an alternative embodiment, as Figure 1 shown, the grinding device for on-line maintenance of the moving ring of a ship's stern shaft further includes an elastic pressing member 7. The grinding assembly 5 is connected to the rotating member 4 through the elastic pressing member 7, and the elastic pressing member 7 expands and contracts between the grinding assembly 5 and the rotating member 4, that is, the expansion and contraction direction of the elastic pressing member 7 is consistent with the axial direction of the stern shaft 1. The elastic pressing member 7 adjusts the contact force between the grinding assembly 5 and the surface to be ground, so that the grinding head 51 always maintains contact with the surface to be ground, thereby avoiding looseness or gaps between the grinding head 51 and the surface to be ground. Through this process, the uniformity of the grinding operation can be ensured, and the flatness and precision of the surface of the moving ring 2 on the ship's stern shaft 1 can be ensured.

[0035] Since the surface to be ground of the moving ring 2 on the ship's stern shaft 1 is often uneven, there may be certain protrusions or depressions. The elastic pressing member 7 is characterized in that it can adjust the contact pressure and position between the grinding assembly 5 and the surface to be ground in real time according to the uneven changes of the surface to be ground of the moving ring 2 during the grinding process. When there is a protrusion on the surface to be ground, the elastic pressing member 7 provides additional elastic pressure through compression, so that the grinding head 51 can bend or resist the protrusion, ensuring that the grinding head 51 continues to be in contact with the protruding part. When there is a depression on the surface to be ground, the elastic pressing member 7 will stretch or release the pressure, so that the grinding head 51 can adapt to the depressed part, thereby maintaining contact with the depressed area and performing uniform grinding.

[0036] The elastic pressing member 7 is usually an elastic member made of a spring or a similar elastic material, and its shape can be a helical spring, a rubber pad or other elastic elements.

[0037] In an alternative embodiment, as Figure 1As shown in the figure, the grinding device for online maintenance of the dynamic seal ring of the ship's stern shaft further includes an adjusting member 8. The adjusting member 8 is arranged on the rotating member 4. One end of the elastic pressing member 7 away from the grinding assembly 5 is connected to the adjusting member 8, which is used to adjust the position of the grinding assembly 5 in the radial direction of the dynamic seal ring 2, so as to realize the grinding of the entire dynamic seal ring. In one embodiment, the adjusting member 8 can be a telescopic member, which drives the grinding assembly 5 to expand and contract in the radial direction of the dynamic seal ring 2 under the action of an external force. In another embodiment, the adjusting member 8 can be an adjusting plate. The adjusting member 8 can also slide along the rotating member to adjust the position of the grinding assembly 5 in the radial direction of the dynamic seal ring 2.

[0038] Furthermore, the adjusting member 8 is slidably connected to the rotating member 4, and the adjusting member 8 can move between the outer edge of the rotating member 4 and the outer wall surface of the stern shaft 1 to adjust the positions of the elastic pressing member 7 and the grinding assembly 5, so that the grinding assembly 5 can grind the entire surface to be ground. The operator can adjust the position of the adjusting member 8 between the outer edge of the rotating member 4 and the outer wall surface of the stern shaft 1 manually or automatically. In one embodiment, a slide rail is provided on the rotating member 4, and the slide rail extends along the outer edge of the rotating member 4 towards the end close to the outer wall surface of the stern shaft 1. The adjusting member 8 is slidably connected to the slide rail to adjust the position of the grinding assembly 5. In one embodiment, a driving motor is provided on the adjusting member 8, and the driving end of the driving motor is connected to the adjusting member 8 to drive the adjusting member 8 to move along the outer edge of the rotating member 4 towards the side close to the outer wall surface of the stern shaft 1. The driving motor can be a linear motor, a cylinder or a screw rod mechanism, etc.

[0039] In one embodiment, the grinding device for online maintenance of the dynamic seal ring of the ship's stern shaft further includes a locking member. The rotating member 4 is provided with through holes, and there can be multiple through holes, which are arranged at intervals along the outer edge of the rotating member 4 towards the side close to the outer wall surface of the stern shaft 1. It should be noted that the positions of the through holes are set in advance according to requirements. A limiting ring is provided on the adjusting member 8, and the limiting ring can be arranged on the outer side wall of the adjusting member 8. It should be noted that this outer side wall does not include the outer wall surface close to the outer wall surface of the stern shaft 1, so that the adjusting member 8 can be in direct contact with the outer wall surface of the stern shaft 1 to realize the grinding of the entire surface to be ground. After the adjusting member 8 moves to the target position, the locking member passes through the limiting ring and is inserted into the corresponding through hole to limit the position of the adjusting member 8 and prevent the adjusting member 8 from moving.

[0040] In an alternative embodiment, as Figure 1 and Figure 2 shown, the grinding device for online maintenance of the dynamic seal ring of the ship's stern shaft further includes a locking assembly 9, which is used to fix the fixing member 3 and the stern shaft 1 to prevent the fixing member 3 from moving relative to the stern shaft 1 during the maintenance process, effectively enhancing the stability and accuracy during the maintenance process.

[0041] As Figure 3As shown, the locking assembly 9 includes a locking member 91. The locking member 91 passes through the fixing member 3. By rotating the locking member 91, the end face of the locking member 91 abuts against or separates from the outer wall surface of the stern shaft 1. In one embodiment, a threaded hole is provided on the outer wall surface of the fixing member 3, and the locking member 91 is a bolt that is threadedly connected to the threaded hole. When it is necessary to fix the fixing member 3 to the stern shaft 1, rotate the bolt to gradually bring the bolt closer to the outer wall surface of the stern shaft 1 until it abuts against the outer wall surface of the stern shaft 1, thereby stably fixing the fixing member 3 on the stern shaft 1. After grinding is completed, rotate the bolt in the reverse direction, and the end face of the bolt gradually separates from the outer wall surface of the stern shaft 1, so that the entire device can be easily removed from the stern shaft 1.

[0042] As Figure 3 shown, the locking assembly 9 further includes an abutting member 92. The abutting member 92 is provided at the end of the locking member 91 and is located inside the fixing member 3. Specifically, the abutting member 92 is fixed to the end of the locking member 91 and can be connected by welding, threaded connection, etc. The abutting member 92 is located between the inner side of the fixing member 3 and the outer wall surface of the stern shaft 1. When the locking member 91 is rotated to achieve fixation, the abutting member 92 abuts against the outer wall surface of the stern shaft 1. Since the area of the abutting member 92 is large, the contact area with the stern shaft 1 can be increased, thereby improving the stability of the connection between the fixing member 3 and the stern shaft 1. At the same time, the abutting member 92 can also protect the outer wall surface of the stern shaft 1 from being damaged. In one embodiment, the abutting member 92 is a rectangular member. In another embodiment, the abutting member 92 can be an arc-shaped abutting member 92 that matches the outer wall surface of the stern shaft 1, with good fit, thereby providing a better contact effect and stability.

[0043] In order to accurately calculate the moving distance of the locking member 91, the locking assembly 9 in the embodiment of the present invention further includes a measuring scale 93. The end of the measuring scale 93 is fixed to the abutting member 92, that is, the end of the measuring scale 93 is flush with the end of the locking member 91 and is located outside the fixing member 3 for easy viewing by the operator. By rotating the locking member 91, the abutting member 92 drives the measuring scale 93 to move with the movement of the locking member 91. The operator can judge the moving distance of the locking member 91 through the scale of the measuring scale 93, so as to confirm whether the abutting member 92 contacts the outer wall surface of the stern shaft 1.

[0044] Furthermore, a limiting member 94 is further provided on the outer wall surface of the fixing member 3. A limiting hole is provided on the limiting member 94, and the measuring scale 93 passes through the limiting hole and is connected to the abutting member 92. The limiting member 94 can limit the position of the measuring scale 93 to prevent the measuring scale 93 from tilting or shifting during the movement process, thereby improving the measurement accuracy and ensuring the stability and reliability of the entire process.

[0045] In the embodiments of the present invention, there are multiple locking components 9. The multiple locking components 9 are arranged at intervals along the circumferential direction of the fixing member 3, which improves the connection stability between the fixing member 3 and the stern shaft 1. The number of the locking components 9 can be 2, 3, 4, 6, etc. The specific number is set according to actual requirements. To improve the stability, the multiple locking components 9 can be evenly distributed on the fixing member 3 to ensure an even locking effect, such as Figure 2 and Figure 3 shown.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An abrasive device for on-line maintenance of the moving ring of a ship's stern shaft, characterized in that, The stern shaft is provided with a moving ring, and the moving ring has a surface to be ground; the grinding device for online maintenance of the moving ring of the ship's stern shaft includes: A fixing member, which is annularly arranged around the stern shaft and has a spacing from the surface to be ground; A rotating member, which is rotatably connected to one side of the fixing member close to the surface to be ground, and the rotating member can rotate around the axis of the fixing member; A grinding assembly, including a grinding head and a driving member, the fixed end of the driving member is connected to the rotating member, and the grinding head is in contact with the surface to be ground; A driving mechanism, the driving end of the driving mechanism is connected to the rotating member.

2. The lapping device for on-line maintenance of the moving ring of a ship stern shaft according to claim 1, characterized in that, It further includes an elastic pressing member, the grinding assembly is connected to the rotating member through the elastic pressing member and can expand and contract between the grinding assembly and the rotating member.

3. The lapping device for on-line maintenance of the dynamic ring of the ship stern shaft according to claim 2, wherein, It further includes an adjusting member, the adjusting member is arranged on the rotating member, one end of the elastic pressing member away from the grinding assembly is connected to the adjusting member, and the adjusting member is used to adjust the position of the grinding assembly in the radial direction of the moving ring.

4. The lapping device for on-line maintenance of the moving ring of a ship stern shaft according to claim 3, wherein, The adjusting member is slidably connected to the rotating member, and the adjusting member can move between the outer edge of the rotating member and the outer wall surface of the stern shaft.

5. The lapping device for online repair of the dynamic ring of a ship's stern shaft according to claim 4, characterized in that, It further includes a locking member, a through hole is provided on the rotating member, a limiting ring is provided on the adjusting member, and after the adjusting member moves to the target position, the locking member passes through the limiting ring and is inserted into the through hole.

6. The lapping device for on-line maintenance of the dynamic ring of a ship stern shaft according to any one of claims 1 to 5, characterized in that, The rotating member is an annular rotating member.

7. The lapping device for online maintenance of the dynamic ring of a ship's stern shaft according to claim 1, characterized in that, It further includes a locking assembly, the locking assembly includes a locking member, the locking member passes through the fixing member, and by rotating the locking member, the end face of the locking member abuts against or separates from the outer wall surface of the stern shaft.

8. The lapping device for online maintenance of the dynamic ring of a ship's stern shaft according to claim 7, characterized in that, The locking assembly further includes an abutting member, the abutting member is arranged at the end of the locking member and is located inside the fixing member.

9. The lapping device for online maintenance of the dynamic ring of a ship stern shaft according to claim 8, characterized in that, The locking assembly further includes a measuring scale, the end of the measuring scale is fixed to the abutting member and is located outside the fixing member.

10. The lapping device for online maintenance of the dynamic ring of a ship's stern shaft according to claim 7, characterized in that, There are multiple locking assemblies, and the multiple locking assemblies are arranged at intervals along the circumferential direction of the fixing member.

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