CN210949863U - Underwater sealing device for stern shaft of ship - Google Patents
Underwater sealing device for stern shaft of ship Download PDFInfo
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- CN210949863U CN210949863U CN201921451046.XU CN201921451046U CN210949863U CN 210949863 U CN210949863 U CN 210949863U CN 201921451046 U CN201921451046 U CN 201921451046U CN 210949863 U CN210949863 U CN 210949863U
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Abstract
The utility model discloses an underwater sealing device for a ship stern shaft, which comprises a cylinder sleeved outside the stern shaft, a tail sealing plate used for sealing the cylinder and a flange used for being connected with a stern tube, wherein the flange is arranged at the end part of the cylinder; the flange is arranged at the end part of the other side of the cylinder, the flange is provided with a connecting bolt hole, and the flange is connected with the stern tube to realize the sealing of the other side of the cylinder, so that the structure is simple and the assembly is convenient. A rubber conical pad used for compressing the stern shaft is arranged in the cylinder, and the rubber conical pad and the stern shaft are elastically compressed, so that the sealing effect is improved; the gap between the cylinder and the stern shaft is filled with lubricating oil to ensure that the internal oil pressure of the cylinder is greater than the external water pressure, the oil is discharged through a stern tube gravity oil tank, so that the inside of the stern tube and the sealing device are filled with the lubricating oil, and the liquid level of the stern tube gravity oil tank is far higher than the water surface, so the oil pressure inside the sealing device is always greater than the external water pressure, and the sealing performance of the sealing device is further ensured.
Description
Technical Field
The utility model relates to a boats and ships technical field, in particular to boats and ships stern axle sealing device under water.
Background
In the ship operation process, periodic dock maintenance is needed, or an accident occurs to carry out dock maintenance, wherein an important project is maintenance of a propulsion shafting. The lower part of the water line of the propulsion shaft system mainly comprises a stern tube, a stern shaft, a propeller and a shaft seal, and because the propulsion shaft system works underwater for a long time, the environment is severe and the working condition is difficult to measure, accidents such as oil leakage of the shaft seal, damage to the propeller and the like frequently occur. Therefore, the dock repair is needed, and when the shaft seal or the propeller is overhauled, the dock repair time is prolonged, so that the overhaul work of other ships entering and exiting the dock is ensured. Depending on the size of the dock, the ship will be fitted in a temporary undocking or fixed-point placement. No matter which mode, the partial part all must seal and guarantee that the shafting does not intake in the stern shaft waterline, guarantees shafting safety. How to quickly and simply realize the sealing of the lower part of the stern shaft waterline is an important problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a boats and ships stern axle sealing device under water that sealing performance is good, simple structure, assembly are simple and convenient.
The utility model discloses an at least one embodiment provides a boats and ships stern axle is sealing device under water, including the suit at the outer drum of stern axle, be used for sealing the tail shrouding of drum, be used for the flange be connected with the stern tube, the flange sets up at the drum tip, tail shrouding and flange with drum welded fastening, the flange is provided with the connecting bolt hole, be provided with the rubber awl pad that is used for compressing tightly the stern axle in the drum, the inside oil pressure of drum is greater than outside water pressure is ensured to the space packing lubricating oil between drum and the stern axle.
Further, the outer wall of the cylinder is provided with a reinforcing ring for reinforcing strength.
Further, the flange is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.
Further, the reinforcing ring is provided with a through hole.
Further, a reinforcing plate is arranged between the cylinder and the flange, and the reinforcing plate is provided with a round hole for hoisting.
The embodiment of the utility model provides an in one or more technical scheme, following beneficial effect has at least: the utility model discloses an underwater sealing device for a ship stern shaft, which comprises a cylinder sleeved outside the stern shaft, a tail sealing plate used for sealing the cylinder and a flange used for being connected with a stern tube, wherein the flange is arranged at the end part of the cylinder; the flange is arranged at the end part of the other side of the cylinder, the flange is provided with a connecting bolt hole, and the flange is connected with the stern tube to realize the sealing of the other side of the cylinder, so that the structure is simple and the assembly is convenient. The rubber conical pad used for compressing the stern shaft is arranged in the cylinder and elastically compressed with the stern shaft, so that the sealing effect is improved, and the stability of the sealing device in water is improved; the gap between the cylinder and the stern shaft is filled with lubricating oil to ensure that the internal oil pressure of the cylinder is greater than the external water pressure, the oil is discharged through a stern tube gravity oil tank, so that the inside of the stern tube and the sealing device are filled with the lubricating oil, and the liquid level of the stern tube gravity oil tank is far higher than the water surface, so the oil pressure inside the sealing device is always greater than the external water pressure, and the sealing performance of the sealing device is further ensured.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples;
fig. 1 is a schematic structural view of an embodiment of the underwater sealing device for the stern shaft of the ship of the present invention;
fig. 2 is a schematic structural view of the embodiment of the underwater sealing device for the stern shaft of the ship of the present invention, which is matched with the stern shaft;
fig. 3 is an enlarged schematic structural view of a portion a in an embodiment of the marine stern shaft underwater sealing device of fig. 1 according to the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Fig. 1, 2 and 3 are schematic structural views of an underwater sealing device for a stern shaft of a ship according to at least one embodiment of the present invention. Referring to fig. 1, 2 and 3, an embodiment of the present invention provides an underwater sealing device for a stern shaft of a ship, including a cylinder 100 sleeved outside the stern shaft, a tail sealing plate 300 for sealing the cylinder 100, and a flange 200 for connecting with a stern tube, wherein the flange 200 is disposed at an end of the cylinder 100, the tail sealing plate 300 and the flange 200 are welded to the cylinder 100, and the tail sealing plate 300 is welded to one end of the cylinder 100 to seal one side of the cylinder 100; the flange 200 is arranged at the end of the other end of the cylinder 100, the flange 200 is provided with a connecting bolt hole 210, a stern shaft is sleeved into the cylinder 100, one end of the cylinder 100 is sealed by a tail sealing plate 300, the other end of the cylinder 100 is connected with a stern tube through the connecting bolt hole 210 on the flange 200, and the stern shaft is sealed in the cylinder 100. A rubber conical pad 110 for compressing the stern shaft is arranged in the cylinder 100, and the rubber conical pad 110 and the stern shaft are elastically compressed, so that the sealing effect is improved, and the stability of the sealing device in water is improved; the gap between the cylinder 100 and the stern shaft is filled with lubricating oil to ensure that the internal oil pressure of the cylinder 100 is greater than the external water pressure, in order to ensure the absolute safety of sealing, the oil is discharged through a stern tube gravity oil tank, so that the stern tube and the sealing device are filled with the lubricating oil, and the liquid level of the stern tube gravity oil tank is far higher than the water level, so the oil pressure in the sealing device is always greater than the external water pressure, and the sealing performance of the sealing device is further ensured.
Further, the outer wall of the cylinder 100 is provided with a reinforcing ring 500 for reinforcing strength. The reinforcing ring 500 is provided to improve the structural strength of the sealing device and the deformation resistance of the sealing device.
Further, the flange 200 is provided with a sealing groove 221, and a sealing ring 220 is arranged in the sealing groove 221. Be provided with sealing washer 220 in the sealed recess 221, sealing washer 220 sets up to have elastic O type sealing washer 220, and sealed recess 221 is fixed sealing washer 220, avoids sealing washer 220 displacement to lead to sealed inefficacy.
Further, the reinforcing ring 500 is provided with a through hole 510. The reinforcing ring 500 is provided with a through hole 510 for hoisting, and the through hole 510 is favorable for hoisting the sealing device for assembling and disassembling, so that the assembling and disassembling simplicity is improved.
Further, a reinforcing plate 400 is arranged between the cylinder 100 and the flange 200, and the reinforcing plate 400 is provided with a circular hole 410 for hoisting. The reinforcing plate 400 can improve the strength of the joint surface of the circular pipe and the flange 200, enhance the deformation resistance of the flange 200 and prolong the service life of the sealing device. The reinforcing plate 400 is provided with a circular hole 410 for hoisting, so that the sealing device can be hoisted for assembly and disassembly, and the assembly and disassembly simplicity is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. The utility model provides a boats and ships stern axle is sealing device under water which characterized in that: the tail sealing plate is used for sealing the cylinder, and the flange is used for being connected with a stern tube, the flange is arranged at the end part of the cylinder, the tail sealing plate and the flange are fixedly welded with the cylinder, the flange is provided with a connecting bolt hole, a rubber conical pad used for compressing the stern shaft is arranged in the cylinder, and lubricating oil is filled in a gap between the cylinder and the stern shaft to ensure that the oil pressure in the cylinder is larger than external water pressure.
2. The underwater sealing device for the stern shaft of the ship according to claim 1, wherein: and a reinforcing ring for reinforcing strength is arranged on the outer wall of the cylinder.
3. The underwater sealing device for the stern shaft of the ship according to claim 1, wherein: the flange is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.
4. The underwater sealing device for the stern shaft of the ship according to claim 2, wherein: the reinforcing ring is provided with a through hole.
5. The underwater sealing device for the stern shaft of the ship according to claim 1, wherein: and a reinforcing plate is arranged between the cylinder and the flange, and the reinforcing plate is provided with a round hole for hoisting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921451046.XU CN210949863U (en) | 2019-09-02 | 2019-09-02 | Underwater sealing device for stern shaft of ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921451046.XU CN210949863U (en) | 2019-09-02 | 2019-09-02 | Underwater sealing device for stern shaft of ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210949863U true CN210949863U (en) | 2020-07-07 |
Family
ID=71377667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921451046.XU Active CN210949863U (en) | 2019-09-02 | 2019-09-02 | Underwater sealing device for stern shaft of ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210949863U (en) |
-
2019
- 2019-09-02 CN CN201921451046.XU patent/CN210949863U/en active Active
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