Stern tube sealing adjusting structure and stern tube sealing adjusting method

Abstract

The invention relates to the technical field of ship manufacturing, in particular to a stern tube sealing adjusting structure and a stern tube sealing adjusting method. A stern tube sealing adjusting structure applied to the stern tube sealing adjusting method comprises an adjusting ring, a sealing assembly, a stern tube and a propeller shaft, the stern tube is provided with a containing through hole extending in the axial direction, the propeller shaft is in clearance fit with the containing through hole, and a groove spigot extending inwards in the axial direction is formed in the end, close to the outside in the axial direction, of the containing through hole. The sealing assembly is used for sealing the stern tube and the propeller shaft, the inner diameter of the adjusting ring is adjustable, the sealing assembly is provided with a flange spigot, the adjusting ring is clamped between the flange spigot and the groove spigot in the radial direction, the adjusting ring is clamped between the groove spigot and the sealing assembly in the axial direction, and sealing assembly of the stern tube and the propeller shaft is achieved. And the sealing assembly and the propeller shaft are coaxially assembled.

Description

Technical Field

[0001] The invention relates to the technical field of shipbuilding, and in particular to a stern tube sealing adjustment structure and a stern tube sealing adjustment method. Background Art

[0002] In order to prevent the lubricating oil between the propeller shaft and the stern tube from leaking into the external waters or the interior of the engine room, and to prevent the external seawater from entering between the stern tube and the propeller shaft, a stern tube sealing device needs to be provided between the propeller shaft and the stern tube.

[0003] In the related art, the stern tube is bored using a boring bar tool, and then the stern tube bearing is installed inside the stern tube, followed by the propeller shaft being installed on the stern tube bearing, and the stern tube sealing device is installed on the front and rear end faces of the stern column, so that the stopper of the stern tube sealing device extends into the inner hole of the stern tube. In the actual installation process, the matching tolerance between the stern tube and the stern tube sealing device and the matching tolerance between the propeller shaft and the stern tube sealing device often causes eccentricity between the axis of the stern tube sealing device and the axis of the propeller shaft, and the measured eccentricity exceeds the allowable static eccentricity, which greatly affects the service life and safety of the ship. The existing solution requires disassembling the assembled stern tube sealing device, stern tube and propeller shaft, and then processing the outer diameter of the part of the stern tube sealing device that interfaces with the stern tube or the inner diameter of the part of the stern tube structure that interfaces with the stern tube sealing device to achieve coaxial assembly of the stern tube sealing device and the propeller shaft. Performing secondary processing on the stern tube sealing device will not only cause the manufacturer to refuse warranty for the stern tube sealing device, but may also affect the normal use of the stern tube sealing device. The risk is too great. The secondary processing of the stern tube requires disassembling too many parts, which is too difficult to process and time-consuming and labor-intensive.

[0004] Therefore, there is an urgent need to invent a stern tube sealing adjustment structure and a stern tube sealing adjustment method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a stern tube seal adjustment structure and a stern tube seal adjustment method, so as to achieve coaxial adjustment of the seal assembly and the propeller shaft without changing the structure of the seal assembly, with simple operation and high adjustment efficiency.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The stern tube seal adjustment structure comprises:

[0008] The stern tube has an accommodating through hole extending in the axial direction, and a groove stop extending inwardly in the axial direction is provided at one end of the accommodating through hole close to the outside in the axial direction;

[0009] The propeller shaft is clearance-matched with the accommodating through hole;

[0010] a sealing assembly, the sealing assembly being used for sealing the stern tube and the propeller shaft; and

[0011] The inner diameter of the adjusting ring is adjustable, the sealing assembly has a flange stop, the adjusting ring is radially clamped between the flange stop and the groove stop, and the adjusting ring is axially clamped between the groove stop and the sealing assembly.

[0012] As an optional solution, the adjustment ring includes:

[0013] Two semicircular rings are arranged opposite to each other and are detachably mounted on the outer periphery of the flange stop along the radial direction.

[0014] As an optional solution, the sealing assembly includes:

[0015] a sealing body, used for sealing the stern tube and the propeller shaft; and

[0016] A spacing ring is arranged between the sealing body and the stern tube along the axial direction, and the flange stop is arranged at one end of the spacing ring close to the stern tube along the axial direction.

[0017] As an optional solution, the sealing assembly further includes:

[0018] A sealing gasket is provided between the sealing body and the spacing ring and between the spacing ring and the stern tube.

[0019] As an optional solution, the stern tube sealing adjustment structure further includes:

[0020] A protective sleeve is fixed to one end of the stern tube axially close to the sealing assembly, and the protective sleeve is radially covered on the outer periphery of the sealing assembly.

[0021] As an optional solution, the groove stopper and the oil pipeline in the stern tube do not interfere with each other.

[0022] As an optional solution, the inner diameter of the adjustment ring is at least 4 mm larger than the outer diameter of the flange stop.

[0023] As an optional solution, the groove stop and the accommodating through hole are formed at one time.

[0024] As an optional solution, the axial length of the groove stop is not less than the axial length of the flange stop.

[0025] A stern tube seal adjustment method, applied to the stern tube seal adjustment structure as described above, comprises the following steps:

[0026] S1. Opening the accommodating through hole and the groove stop in the stern tube;

[0027] S2. adjusting the inner diameter of the adjusting ring according to the size of the flange stop in the sealing assembly;

[0028] S3. Set the adjustment ring at the groove stop, assemble the stern tube, the adjustment ring, the sealing assembly and the propeller shaft seal together, so that the inner circumferential wall of the adjustment ring abuts against the outer circumferential wall of the flange stop, the outer circumferential wall of the adjustment ring abuts against the inner cavity wall of the groove stop, and the two end faces of the adjustment ring abut against the radial end face of the sealing assembly and the radial end face of the groove stop, respectively.

[0029] Beneficial effects of the present invention:

[0030] The stern tube seal adjustment structure provided by the present invention can prevent the lubricating oil between the propeller shaft and the stern tube from leaking to the external waters or the interior of the engine room while preventing external seawater from entering between the stern tube and the propeller shaft by arranging an adjusting ring with an adjustable inner diameter, a groove stop extending axially inward is provided at one end of the accommodating through hole, and a flange stop is provided on the sealing assembly, and the adjusting ring with an adjustable inner diameter is clamped between the flange stop and the groove stop, and axially clamped between the groove stop and the sealing assembly. When the eccentricity of the propeller shaft and the sealing assembly exceeds a specified amount, the inner diameter of the adjusting ring can be adjusted to change the actual assembly position between the propeller shaft, the sealing assembly and the stern tube, thereby adjusting the eccentricity of the sealing assembly so that the sealing assembly and the propeller shaft are assembled coaxially.

[0031] The present invention also provides a stern tube seal adjustment method. By applying the above-mentioned stern tube seal adjustment device, on the basis of sealing and assembling the stern tube and the propeller shaft, coaxial assembly of the sealing component and the propeller shaft is achieved, thereby further improving the sealing effect between the sealing component and the stern tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a structural schematic diagram of a stern tube sealing structure provided in Embodiment 1 of the present invention;

[0033] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0034] Figure 3 yes Figure 2 A partial enlarged view of point B in the middle;

[0035] Figure 4 is a schematic structural diagram of an adjustment ring provided in Embodiment 1 of the present invention;

[0036] Figure 5 is a first structural schematic diagram of a portion of a stern tube provided in Embodiment 1 of the present invention;

[0037] Figure 6 It is a first structural schematic diagram of a portion of a stern tube, a portion of an adjustment ring, and a portion of a sealing assembly provided in the first embodiment of the present invention when the inner diameter of the adjustment ring is equal to the inner diameter of the accommodating through hole;

[0038] Figure 7 is a second structural schematic diagram of a portion of the stern tube, a portion of the adjustment ring, and a portion of the sealing assembly provided in the first embodiment of the present invention when the inner diameter of the adjustment ring is larger than the inner diameter of the accommodating through hole;

[0039] Figure 8 is a third structural schematic diagram of a portion of the stern tube, a portion of the adjustment ring, and a portion of the sealing assembly provided in the first embodiment of the present invention when the inner diameter of the adjustment ring is smaller than the inner diameter of the accommodating through hole;

[0040] Fig. 9 is a schematic structural diagram of a portion of a sealing assembly provided in Embodiment 1 of the present invention;

[0041] Fig.10 is a second structural schematic diagram of a portion of a stern tube provided in Embodiment 1 of the present invention;

[0042] Fig.11 It is a flow chart of the stern tube sealing adjustment method provided in the second embodiment of the present invention.

[0043] In the figure:

[0044] 100, adjusting ring; 110, semicircular ring;

[0045] 200, sealing assembly; 210, sealing body; 220, spacing ring; 221, flange stop; 230, sealing gasket;

[0046] 300, protective sleeve;

[0047] 2000, stern tube; 2100, groove stop; 2200, oil pipeline;

[0048] 3000. Propeller shaft. DETAILED DESCRIPTION

[0049] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0050] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0052] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0053] Embodiment 1

[0054] In order to prevent the lubricating oil between the propeller shaft and the stern tube from leaking to the external waters or the interior of the engine room, and to prevent the external seawater from entering between the propeller shaft and the stern tube, a stern tube sealing device needs to be installed between the propeller shaft and the stern tube. Specifically, the stern tube needs to be bored using a boring bar tool, and then the stern tube bearing is assembled inside the stern tube, followed by the propeller shaft being installed on the stern tube bearing, and the stern tube sealing device is installed on the front and rear end faces of the stern column at the same time, so that the stop of the stern tube sealing device extends into the inner hole of the stern tube. In the actual installation process, the matching tolerance between the stern tube and the stern tube sealing device and the matching tolerance between the propeller shaft and the stern tube sealing device often results in eccentricity between the axis of the stern tube sealing device and the axis of the propeller shaft, and the measured value of the eccentricity exceeds the allowable static eccentricity, which greatly affects the service life and safety of the ship. The existing solution requires disassembling the assembled stern tube sealing device, stern tube and propeller shaft, and then processing the outer diameter of the part of the stern tube sealing device that interfaces with the stern tube or the inner diameter of the part of the stern tube structure that interfaces with the stern tube sealing device to achieve coaxial assembly of the stern tube sealing device and the propeller shaft. Performing secondary processing on the stern tube sealing device will not only cause the manufacturer to refuse warranty for the stern tube sealing device, but may also affect the normal use of the stern tube sealing device. The risk is too great. The secondary processing of the stern tube requires disassembling too many parts, which is too difficult to process and time-consuming and labor-intensive.

[0055] In order to solve the above problems, Figure 1 to Figure 3 As shown, this embodiment provides a stern tube sealing adjustment structure. The stern tube sealing adjustment structure includes a stern tube 2000, a propeller shaft 3000, a sealing assembly 200 and an adjusting ring 100, wherein the stern tube 2000 has an accommodating through hole extending in the axial direction, and an end of the accommodating through hole close to the outside in the axial direction is provided with a groove stopper 2100 extending inward in the axial direction, the propeller shaft 3000 and the accommodating through hole are in clearance fit, the sealing assembly 200 is used to seal the stern tube 2000 and the propeller shaft 3000, the inner diameter of the adjusting ring 100 is adjustable, the sealing assembly 200 has a flange stopper 221, the adjusting ring 100 is radially clamped between the flange stopper 221 and the groove stopper 2100, and the adjusting ring 100 is axially clamped between the groove stopper 2100 and the sealing assembly 200.

[0056] The stern tube sealing adjustment structure is provided with an axially extending accommodation through hole in the stern tube 2000, so that the sealing assembly 200, the stern tube 2000 and the propeller shaft 3000 are matched and installed with each other, and can prevent the lubricating oil between the propeller shaft 3000 and the stern tube 2000 from leaking to the external waters or the interior of the cabin, and prevent the external seawater from entering between the stern tube 2000 and the propeller shaft 3000. By providing an adjustment ring 100 with an adjustable inner diameter, a groove stop 2100 extending axially inward is provided at one end of the accommodation through hole, and a flange is provided on the sealing assembly 200. The stop 221 clamps the adjusting ring 100 with adjustable inner diameter radially between the flange stop 221 and the groove stop 2100, and axially between the groove stop 2100 and the sealing assembly 200. When the eccentricity between the propeller shaft 3000 and the sealing assembly 200 exceeds a specified amount, the inner diameter of the adjusting ring 100 can be adjusted to change the actual assembly position between the propeller shaft 3000, the sealing assembly 200 and the stern tube 2000, thereby adjusting the eccentricity of the sealing assembly 200 so that the sealing assembly 200 and the propeller shaft 3000 are assembled coaxially.

[0057] In the present embodiment, the sealing assembly 200 includes a sealing body 210 and a spacing ring 220, wherein the sealing body 210 is used to seal the stern tube 2000 and the propeller shaft 3000, the spacing ring 220 is axially arranged between the sealing body 210 and the stern tube 2000, and the spacing ring 220 is axially arranged at one end close to the stern tube 2000 with a flange stop 221. It should be noted that the sealing assembly 200 is purchased on the market. Therefore, in order to ensure the safety of the use of the sealing assembly 200 and to ensure the warranty of the sealing assembly 200, the sealing assembly 200 must not be damaged. The stern tube sealing adjustment structure provided in the present embodiment can realize the coaxial assembly of the sealing assembly 200 and the propeller shaft 3000 without destroying the structure of the sealing assembly 200. The specific structure and working principle of the sealing body 210 and the spacing ring 220 belong to the prior art and will not be repeated here.

[0058] In addition, the sealing assembly 200 further includes a sealing gasket 230, wherein the sealing gasket 230 is disposed between the sealing body 210 and the spacing ring 220 and between the spacing ring 220 and the stern tube 2000. By disposing the sealing gasket 230 between the sealing body 210 and the spacing ring 220 and between the spacing ring 220 and the stern tube 2000, the sealing gasket 230 can be used to fill the gap between the sealing body 210 and the spacing ring 220 and the gap between the spacing ring 220 and the stern tube 2000, thereby further improving the sealing effect of the sealing assembly 200.

[0059] In an optional solution, the stern tube seal adjustment structure further includes a protective sleeve 300, wherein the protective sleeve 300 is fixed to one end of the stern tube 2000 axially close to the seal assembly 200, and the protective sleeve 300 is radially covered on the outer periphery of the seal assembly 200. By fixing the protective sleeve 300 at one end of the stern tube 2000 axially close to the seal assembly 200 and the protective sleeve 300 being covered on the outer periphery of the seal assembly 200, the protection of the seal assembly 200 can be improved.

[0060] As an alternative, Figure 4 As shown, the adjusting ring 100 includes two semicircular rings 110 arranged opposite to each other, and the two semicircular rings 110 are detachably mounted on the outer periphery of the flange stop 221 in the radial direction. By configuring the adjusting ring 100 as two semicircular rings 110 arranged opposite to each other, when it is necessary to remove the adjusting ring 100 from the flange stop 221, the two semicircular rings 110 can be directly removed from the flange stop 221 in the radial direction respectively, without the need to remove the sealing assembly 200 and the adjusting ring 100 as a whole from the propeller shaft 3000 in the axial direction and then remove the adjusting ring 100 from the flange stop 221 in the sealing assembly 200, thereby simplifying the removal steps of the adjusting ring 100, reducing the difficulty of removing the adjusting ring 100, and greatly improving the work efficiency.

[0061] In this embodiment, the groove stop 2100 and the accommodating through hole are processed and formed at one time. By processing the groove stop 2100 and the accommodating through hole at one time, the processing efficiency of the stern tube 2000 can be improved.

[0062] like Figure 5 As shown, the axial length L of the groove stop 2100 is 10 mm, and the radial depth B of the groove stop 2100 is 10 mm. In other embodiments, the specific value of the axial length L of the groove stop 2100 and the specific value of the radial depth B can also be adjusted according to actual needs, and this embodiment does not make specific limitations.

[0063] In addition, the groove stop 2100 and the oil pipeline 2200 in the stern tube 2000 do not interfere with each other.

[0064] To ensure the normal docking of the adjusting ring 100 and the flange stop 221, Figure 6 to Figure 8As shown, the axial length of the groove stop 2100 is not less than the axial length of the flange stop 221. By ensuring that the axial length of the groove stop 2100 is not less than the axial length of the flange stop 221, when the inner diameter of the adjustment ring 100 is processed radially, it is possible to arbitrarily change the size of the inner diameter of the adjustment ring 100 while ensuring that the flange stop 221 and the groove stop 2100 do not interfere with each other. It should be noted that, in this embodiment, the axial length L of the groove stop 2100 is 10 mm, and the axial length of the flange stop 221 is 8 mm. In other embodiments, the axial length L of the groove stop 2100 and the axial length of the flange stop 221 can also be adjusted according to actual needs, and this embodiment does not make specific limitations.

[0065] As an optional solution, the inner diameter of the adjusting ring 100 is at least 4 mm larger than the outer diameter of the flange stop 221. By making the inner diameter of the adjusting ring 100 at least 4 mm larger than the outer diameter of the flange stop 221, the matching tolerance gap between the stern tube 2000 and the sealing assembly 200 and the matching tolerance gap between the sealing assembly 200 and the propeller shaft 3000 can be fully adapted. Fig. 9 and Fig.10 As shown, the outer diameter of the flange stop 221 is φ1, φ1=100 mm, and the inner diameter of the adjustment ring 100 is φ2, φ2=96 mm. In other embodiments, the specific values ​​of φ1 and φ2 can also be adjusted according to actual needs, and this embodiment does not make specific limitations.

[0066] Embodiment 2

[0067] This embodiment provides a stern tube sealing adjustment method. The stern tube sealing adjustment method is applied to the stern tube sealing adjustment structure provided in the above-mentioned embodiment 1. Specifically, Fig.11 As shown, the stern tube seal adjustment method comprises the following steps:

[0068] S1. Opening a receiving through hole and a groove stop 2100 in the stern tube 2000;

[0069] S2, adjusting the inner diameter of the adjusting ring 100 according to the size of the inner flange stop 221 of the sealing assembly 200;

[0070] S3. Set the adjustment ring 100 at the groove stop 2100, and seal and assemble the stern tube 2000, the adjustment ring 100, the sealing assembly 200 and the propeller shaft 3000 together, so that the inner circumferential wall of the adjustment ring 100 abuts against the outer circumferential wall of the flange stop 221, the outer circumferential wall of the adjustment ring 100 abuts against the inner cavity wall of the groove stop 2100, and the two end faces of the adjustment ring 100 abut against the radial end face of the sealing assembly 200 and the radial end face of the groove stop 2100 respectively.

[0071] The stern tube sealing adjustment method realizes the coaxial assembly of the sealing assembly 200 and the propeller shaft 3000 on the basis of sealing and assembling the stern tube 2000 and the propeller shaft 3000 by applying the above-mentioned stern tube sealing adjustment device, thereby further improving the sealing effect between the sealing assembly 200 and the stern tube 2000.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The stern tube sealing adjustment structure is characterized by: include: The stern tube (2000) has an accommodating through hole extending in the axial direction, and one end of the accommodating through hole close to the outside in the axial direction is provided with a groove stop (2100) extending inwardly in the axial direction; The propeller shaft (3000) is clearance-matched with the accommodating through hole; a sealing assembly (200), the sealing assembly (200) being used to seal the stern tube (2000) and the propeller shaft (3000); and An adjusting ring (100) having an adjustable inner diameter, the sealing assembly (200) having a flange stop (221), the adjusting ring (100) being radially clamped between the flange stop (221) and the groove stop (2100), and the adjusting ring (100) being axially clamped between the groove stop (2100) and the sealing assembly (200).

2. The stern tube sealing adjustment structure according to claim 1, characterized in that: The adjusting ring (100) comprises: Two semicircular rings (110) are arranged opposite to each other, and the two semicircular rings (110) are detachably mounted on the outer periphery of the flange stop (221) along the radial direction.

3. The stern tube sealing adjustment structure according to claim 1, characterized in that: The sealing assembly (200) comprises: a sealing body (210) for sealing the stern tube (2000) and the propeller shaft (3000); and A spacing ring (220) is arranged between the sealing body (210) and the stern tube (2000) along the axial direction, and the flange stop (221) is arranged at one end of the spacing ring (220) close to the stern tube (2000) along the axial direction.

4. The stern tube sealing adjustment structure according to claim 3, characterized in that: The sealing assembly (200) further comprises: A sealing gasket (230) is provided between the sealing body (210) and the spacing ring (220), and between the spacing ring (220) and the stern tube (2000).

5. The stern tube sealing adjustment structure according to claim 1, characterized in that: The stern tube sealing adjustment structure also includes: A protective sleeve (300) is fixed to one end of the stern tube (2000) axially close to the sealing assembly (200), and the protective sleeve (300) is radially covered on the outer periphery of the sealing assembly (200).

6. The stern tube sealing adjustment structure according to claim 1, characterized in that: The groove stop (2100) and the oil pipeline (2200) in the stern tube (2000) do not interfere with each other.

7. The stern tube sealing adjustment structure according to claim 1, characterized in that: The inner diameter of the adjustment ring (100) is at least 4 mm greater than the outer diameter of the flange stop (221).

8. The stern tube sealing adjustment structure according to claim 1, characterized in that: The groove stop (2100) and the accommodating through hole are formed in one process.

9. The stern tube sealing adjustment structure according to claim 1, characterized in that: The axial length of the groove stop (2100) is not less than the axial length of the flange stop (221).

10. A stern tube seal adjustment method, characterized in that: The stern tube sealing adjustment structure as claimed in any one of claims 1 to 9 comprises the following steps: S1, opening the accommodating through hole and the groove stop (2100) in the stern tube (2000); S2, adjusting the inner diameter of the adjustment ring (100) according to the size of the flange stop (221) in the sealing assembly (200); S3. The adjusting ring (100) is arranged at the groove stop (2100), and the stern tube (2000), the adjusting ring (100), the sealing assembly (200) and the propeller shaft (3000) are sealed and assembled together, so that the inner peripheral wall of the adjusting ring (100) abuts against the outer peripheral wall of the flange stop (221), the outer peripheral wall of the adjusting ring (100) abuts against the inner cavity wall of the groove stop (2100), and the two end faces of the adjusting ring (100) abut against the radial end face of the sealing assembly (200) and the radial end face of the groove stop (2100), respectively.

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