Sealing device with copper gasket for ship tail shaft

Abstract

The utility model relates to the technical field of ship industry part manufacturing, and discloses a sealing device with a copper gasket for a ship tail shaft, which comprises a fluororubber sealing base ring, and a buffer annular hollow groove is arranged on the fluororubber sealing base ring close to an inner ring and close to the top surface in a surrounding manner. The fluororubber sealing base ring and the fastening bundle fluororubber edge sleeve are arranged to serve as the end face sealing contact structure and the side edge wrapping structure of the copper gasket respectively, the fastening spring ring is embedded in the position, close to the inner ring, of the fastening bundle fluororubber edge sleeve, and after the sealing ring is buckled to the copper gasket, the outer edge of the outer side of the copper gasket can be buckled and sleeved, and pre-tightening force is provided; the situation that structural fatigue occurs when the fluororubber sealing base ring and the fastening bundle wrapping fluororubber edge sleeve are applied for a long time is avoided, the sealing ring structure is completely and stably buckled and sleeved on the surface of the copper gasket in an all-dimensional mode, the character that the copper gasket is wrapped on the side body to provide pre-tightening force is achieved, and it is better guaranteed that the sealing ring and the copper gasket are tightly attached and are durable and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of ship industry parts manufacturing, in particular to a sealing device with a copper gasket for a ship's stern shaft. Background Art

[0002] The copper gasket on the ship's stern shaft is an important component of the ship's tail shaft system. It is mainly used to seal and support the tail shaft and the stern bearing to prevent seawater from corroding the tail shaft. At the same time, it provides necessary lubrication and reduces friction and wear between the tail shaft and the stern bearing. In addition, the copper gasket can also withstand certain axial and radial loads, playing a supporting and positioning role. The copper gasket on the stern shaft of the ship is made of copper alloy material. The copper alloy material can make the copper gasket on the ship's stern shaft have good corrosion resistance, wear resistance and pressure resistance, and can adapt to the harsh working environment of the ship's stern shaft.

[0003] The sealing device used with a ship's stern shaft copper gasket is a specialized device used to seal the ship's stern shaft (tail shaft). Its core function is to establish an effective seal between the stern shaft and the hull to prevent seawater from entering the hull and prevent stern shaft lubricating oil from leaking into the sea. The performance of this sealing device is directly related to the normal operation of the ship and environmental protection. The sealing device used with a ship's stern shaft copper gasket generally uses a sealing ring as a companion.

[0004] At present, the sealing ring used in conjunction with the copper gasket of the ship's stern shaft is generally made of corrosion-resistant rubber materials such as fluororubber (VITON) to ensure good wear resistance and sealing performance of the sealing structure. However, it is difficult to fully and stably buckle the copper gasket surface in all directions based on the corrosion-resistant rubber used as the sealing component. In particular, it is difficult to wrap the copper gasket sideways and provide pre-tightening force, making it difficult to ensure a tight fit between the sealing ring and the copper gasket. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides a sealing device with a copper gasket for a ship's stern shaft, which solves the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A sealing device with a copper gasket for a ship's stern shaft comprises a fluororubber sealing base ring, wherein a buffer ring hollow groove is provided around the inner ring and near the top surface of the fluororubber sealing base ring, a fluororubber fastening contact convex rubber ring is integrally connected to the top surface of the fluororubber sealing base ring near the inner ring, a fastening bundle fluororubber edge sleeve is integrally connected to the top surface of the fluororubber sealing base ring near the outer edge, an accommodating hollow groove is provided inside the fastening bundle fluororubber edge sleeve near the inner ring, a fixing spring ring is provided inside the accommodating hollow groove, and a prestressed stress release expansion groove is provided on the outer ring of the fastening bundle fluororubber edge sleeve.

[0008] Preferably, a first stress release slope groove is provided on the top edge of the outer ring of the fluororubber sealing base ring, and the first stress release slope groove is provided around the outer ring of the fluororubber sealing base ring.

[0009] Preferably, a second stress release slope groove is provided on the top edge of the outer ring of the fastening bundle wrapped fluororubber along the sleeve, and the second stress release slope groove is provided around the outer ring of the fastening bundle wrapped fluororubber along the sleeve.

[0010] Preferably, the number of the buffer annular grooves and the fluororubber fastening contact convex rubber rings are both two, and the two buffer annular grooves are respectively located below the two fluororubber fastening contact convex rubber rings, and the two fluororubber fastening contact convex rubber rings are distributed as circular ring-shaped buckle sleeves with different diameters.

[0011] Preferably, the prestress release expansion groove is opened longitudinally through the fastening bundle package fluororubber sleeve, and the opening position of the prestress release expansion groove coincides with the opening position of the second stress release slope groove.

[0012] Preferably, the opening width of the prestressed release expansion groove close to the outer ring of the fastening bundle package fluororubber along the sleeve is greater than the groove width close to the inner side of the fastening bundle package fluororubber along the sleeve, and the number of the prestressed release expansion grooves is multiple, and the multiple prestressed release expansion grooves are equidistantly distributed around the fastening bundle package fluororubber along the sleeve.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The sealing device with a copper gasket for a ship's stern shaft is characterized by arranging a fluororubber sealing base ring and a fastening bundled fluororubber sleeve as an end face sealing contact structure and a side edge wrapping structure of the copper gasket respectively, and embedding a fastening spring ring near the inner ring of the fastening bundled fluororubber sleeve. After the sealing ring is fastened to the copper gasket, the outer edge of the copper gasket can be fastened and a pre-tightening force can be provided to avoid structural fatigue of the fluororubber sealing base ring and the fastening bundled fluororubber sleeve during long-term use, so that the sealing ring structure can be fastened and stably fitted on the surface of the copper gasket in all directions, achieving the characteristic of wrapping the copper gasket sideways to provide pre-tightening force, and better ensuring a tight fit and long-term stability between the sealing ring and the copper gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional view of the structure of the utility model;

[0016] Figure 2 This is an enlarged three-dimensional view of the partial structure of the utility model;

[0017] Figure 3 This is an enlarged three-dimensional view of another partial structure of the utility model;

[0018] Figure 4 This is another three-dimensional view of the structure of the utility model.

[0019] In the figure: 1. Fluororubber sealing base ring; 2. First stress release ramp groove; 3. Buffer ring empty groove; 4. Fluororubber fastening contact convex rubber ring; 5. Fastening bundle fluororubber sleeve; 6. Second stress release ramp groove; 7. Prestressed release expansion groove; 8. Accommodating empty groove; 9. Fastening spring ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Reference Figure 1-4 A sealing device with a copper gasket for a ship's stern shaft comprises a fluororubber sealing base ring 1. A buffer ring groove 3 is provided around the fluororubber sealing base ring 1 near the inner ring and near the top surface. A fluororubber fastening contact convex rubber ring 4 is integrally connected to the top surface of the fluororubber sealing base ring 1 near the inner ring. A fastening bundle fluororubber edge sleeve 5 is integrally connected to the top surface of the fluororubber sealing base ring 1 near the outer edge. An accommodating groove 8 is provided inside the fastening bundle fluororubber edge sleeve 5 near the inner ring. A fastening spring ring 9 is provided inside the accommodating groove 8. A prestressed release expansion groove 7 is provided on the outer ring of the fastening bundle fluororubber edge sleeve 5.

[0022] In the present invention, a first stress release slope groove 2 is provided on the top edge of the outer ring of the fluororubber sealing base ring 1. The first stress release slope groove 2 is provided around the outer ring of the fluororubber sealing base ring 1.

[0023] More specifically, by setting a first stress release ramp groove 2 around the outer ring of the fluororubber sealing base ring 1, the outer ring thickness of the fluororubber sealing base ring 1 is smaller than the main body thickness, which can provide better stress release and adaptive deformation during installation.

[0024] In the present invention, a second stress release slope groove 6 is provided on the top edge of the outer ring of the fastening bundle wrapped fluororubber sleeve 5, and the second stress release slope groove 6 is provided around the outer ring of the fastening bundle wrapped fluororubber sleeve 5;

[0025] More specifically, by setting a second stress release slope groove 6 around the outer ring of the fastening bundle wrapped fluororubber sleeve 5, the fastening bundle wrapped fluororubber sleeve 5 can be adaptively deformed when it is buckled to the outer edge of the copper alloy gasket, thereby avoiding fatigue of the structure during long-term use.

[0026] In the present invention, the number of the buffer annular groove 3 and the fluororubber fastening contact convex rubber ring 4 is two, and the two buffer annular grooves 3 are respectively located below the two fluororubber fastening contact convex rubber rings 4, and the two fluororubber fastening contact convex rubber rings 4 are circular ring-shaped structure buckle sleeves with different circular diameters;

[0027] More specifically, by setting two buffer annular grooves 3 respectively below the two fluororubber fastening contact convex rubber rings 4, the two fluororubber fastening contact convex rubber rings 4 can better buffer the depression when contacting the end face of the copper alloy gasket, making the fit tighter.

[0028] In the present invention, the prestress release expansion groove 7 is longitudinally opened through the fastening bundle package fluororubber sleeve 5, and the opening position of the prestress release expansion groove 7 coincides with the opening position of the second stress release ramp groove 6;

[0029] More specifically, by arranging the opening position of the prestress release expansion groove 7 to coincide with the opening position of the second stress release ramp groove 6 and centrally arranging them on the outer ring, the instability of the inner ring of the structure is avoided.

[0030] In the present invention, the opening width of the prestressed release expansion groove 7 near the outer ring of the fastening bundle package fluororubber sleeve 5 is greater than the groove width near the inner side of the fastening bundle package fluororubber sleeve 5, the number of prestressed release expansion grooves 7 is multiple, and the multiple prestressed release expansion grooves 7 are equidistantly distributed around the fastening bundle package fluororubber sleeve 5;

[0031] More specifically, by setting a plurality of prestressed release expansion grooves 7 and distributing them equidistantly along the sleeve 5 around the fastening bundle of fluororubber, the fastening spring ring 9 provides a pre-tightening force, ensuring that when the copper alloy gasket and the sealing ring are tightly fitted, they can better deform and expand according to the deformation of the fastening spring ring 9.

[0032] Working principle:

[0033] In application, the copper gasket is buckled into the fastening bundle of fluororubber sleeve 5, and is fastened by the fastening spring ring 9 close to the inner ring inside the fastening bundle of fluororubber sleeve 5 to provide pre-tightening force, and the end face of the copper gasket contacts the fluororubber sealing base ring to provide a sealed end face structure, and the opening of the buffer annular groove 3 and the fluororubber fastening contact convex rubber ring 4 can make the fluororubber fastening contact convex rubber ring 4 collapse and deform after contacting the copper gasket, thereby pressing it more tightly to its end face.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing device with a copper gasket for a ship's stern shaft, comprising a fluororubber sealing base ring (1), characterized in that: The fluororubber sealing base ring (1) is provided with a buffer ring hollow groove (3) near the inner ring and near the top surface, the top surface of the fluororubber sealing base ring (1) is integrally connected with a fluororubber fastening contact convex rubber ring (4) near the inner ring, the top surface of the fluororubber sealing base ring (1) is integrally connected with a fastening bundle fluororubber edge sleeve (5) near the outer edge, the inside of the fastening bundle fluororubber edge sleeve (5) is provided with an accommodating hollow groove (8) near the inner ring, the inside of the accommodating hollow groove (8) is provided with a fastening spring ring (9), and the outer ring of the fastening bundle fluororubber edge sleeve (5) is provided with a prestressed release expansion groove (7).

2. A sealing device with a copper gasket for a ship's stern shaft according to claim 1, characterized in that: A first stress release slope groove (2) is provided on the top edge of the outer ring of the fluororubber sealing base ring (1), and the first stress release slope groove (2) is provided around the outer ring of the fluororubber sealing base ring (1).

3. A sealing device with a copper gasket for a ship's stern shaft according to claim 1, characterized in that: A second stress release slope groove (6) is provided on the top edge of the outer ring of the fastening bundle fluororubber sleeve (5), and the second stress release slope groove (6) is provided around the outer ring of the fastening bundle fluororubber sleeve (5).

4. A sealing device with a copper gasket for a ship's stern shaft according to claim 1, characterized in that: The number of the buffer annular groove (3) and the number of the fluororubber fastening contact convex rubber ring (4) are both two, and the two buffer annular grooves (3) are respectively located below the two fluororubber fastening contact convex rubber rings (4), and the two fluororubber fastening contact convex rubber rings (4) are arranged in annular structures with different diameters.

5. The sealing device with copper gasket for a ship's stern shaft according to claim 3, characterized in that: The prestress release expansion groove (7) is longitudinally penetrated through the fastening bundle fluororubber sleeve (5) and is opened, and the opening position of the prestress release expansion groove (7) coincides with the opening position of the second stress release ramp groove (6).

6. A sealing device with a copper gasket for a ship's stern shaft according to claim 1, characterized in that: The opening width of the prestressed release expansion groove (7) close to the outer ring of the fastening bundle package fluororubber sleeve (5) is greater than the groove width close to the inner side of the fastening bundle package fluororubber sleeve (5), and the number of the prestressed release expansion grooves (7) is multiple, and the multiple prestressed release expansion grooves (7) are equidistantly distributed around the fastening bundle package fluororubber sleeve (5).

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