CN215410196U - Twin-channel sealing device for stern shaft - Google Patents
Twin-channel sealing device for stern shaft Download PDFInfo
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- CN215410196U CN215410196U CN202121297046.6U CN202121297046U CN215410196U CN 215410196 U CN215410196 U CN 215410196U CN 202121297046 U CN202121297046 U CN 202121297046U CN 215410196 U CN215410196 U CN 215410196U
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- ring
- mounting seat
- flow channel
- stern shaft
- pipe joint
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Abstract
The utility model discloses a stern shaft double-path sealing device, which comprises: the mounting seat is internally provided with a through hole corresponding to a stern shaft, an embedded groove corresponding to the inflatable sealing ring is formed in the through hole, a water inlet flow channel communicated with the water inlet pipe joint and the through hole is formed in the mounting seat, a gas inlet flow channel positioned between the gas inlet pipe joint and the embedded groove is formed in the mounting seat, a submerged flow channel extending to the rear of the water inlet flow channel is formed in the embedded groove, the front surface of the mounting seat is provided with a threaded hole penetrating through the water inlet flow channel and extending to the submerged flow channel, and the double-way switching screw is arranged in the threaded hole. Through the mode, the double-way sealing device for the stern shaft can unscrew the double-way switching screw when an air source fails, and open the water inlet flow channel and the submerged flow channel, so that cooling water enters the inflatable sealing ring through the submerged flow channel, and the inflatable sealing ring expands to form radial water seal.
Description
Technical Field
The utility model relates to the technical field of marine transmission sealing, in particular to a stern shaft double-way sealing device.
Background
In the working process of the stern shaft, radial and axial micro-amplitude movement (+/-3-4 mm) is easy to generate, and difficulty is brought to the sealing of the stern shaft.
The utility model patent with application number 200810024665.0 discloses a ship stern shaft shock-resistant end face sealing device, which ensures the water sealing performance through a cooling water inlet and outlet channel, and when a ship is maintained on water, an inflatable seal tightly holds a stern shaft in an inflated state to form radial water sealing. Therefore, a stable air supply system is needed to play a due role in waterborne maintenance of the ship, but the waterborne maintenance of the ship belongs to an incident, the stability of the air supply system is not high, a stable air source can be provided in the waterborne maintenance of the ship, the inflatable seal cannot hold the stern shaft tightly, the sealing effect is influenced, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model mainly solves the technical problem of providing a twin-way sealing device for a stern shaft, and the twin-way sealing device can improve the reaction capability and the sealing effect of a ship during waterborne maintenance.
In order to solve the technical problems, the utility model adopts a technical scheme that: there is provided a stern shaft two-way sealing device comprising: the mounting seat is internally provided with a through hole corresponding to a stern shaft, an embedded groove corresponding to the inflatable sealing ring is arranged in the through hole, the inflatable sealing ring is arranged in the embedded groove, the water inlet pipe joint is arranged on the mounting seat, a water inlet flow channel communicated with the water inlet pipe joint and the through hole is arranged in the mounting seat, the air inlet pipe joint and the exhaust pipe joint are oppositely arranged on the mounting seat, the mounting seat is internally provided with an air inlet flow channel positioned between the air inlet pipe joint and the embedded groove and an exhaust flow channel positioned between the exhaust pipe joint and the embedded groove, the embedded groove is internally provided with a subsurface flow channel extending to the rear of the water inlet flow channel, the front surface of the mounting seat is provided with a threaded hole penetrating through the water inlet flow channel and extending to the subsurface flow channel, and the double-way switching screw is arranged in the threaded hole, and the lining ring is provided with ports which extend to the outer side of the inflatable sealing ring and correspond to the air inlet flow passage, the exhaust flow passage and the submerged flow passage one by one.
In a preferred embodiment of the utility model, the embedded groove is located at the tail end of the mounting seat, and the tail end of the mounting seat is provided with a cover ring corresponding to the embedded groove.
In a preferred embodiment of the utility model, the mounting seat is provided with a drain pipe joint at the bottom, and a drain flow passage which is communicated with the drain pipe joint and the through hole is arranged in the mounting seat.
In a preferred embodiment of the utility model, the screw rod further comprises a movable ring, a stationary ring, an elastic airtight ring, a stationary ring seat and a movable ring seat, wherein the stationary ring seat is arranged in front of the mounting seat, the elastic airtight ring is arranged between the stationary ring seat and the mounting seat, the stationary ring is arranged on the front surface of the stationary ring seat, the movable ring seat is arranged on the screw shaft and is positioned in front of the stationary ring seat, and the movable ring is arranged on the back surface of the movable ring seat and corresponds to the stationary ring.
In a preferred embodiment of the utility model, clamping rings are arranged on two sides of the elastic airtight ring, and a screw is arranged between the two clamping rings.
In a preferred embodiment of the present invention, an O-shaped sealing strip is disposed in the movable ring.
The utility model has the beneficial effects that: according to the stern shaft double-path sealing device disclosed by the utility model, when the stern shaft normally rotates to work, cooling water is introduced into the through hole through the water inlet pipe connector to perform friction cooling on the moving ring and the static ring, so that the sealing effect is ensured, when the stern shaft stops rotating and is maintained, the air can be filled into the air-filled sealing ring through the air inlet pipe connector, the stern shaft is tightly held to form radial water seal, if an air source fails, the double-path switching screw is loosened to open the water inlet flow passage and the submerged flow passage, so that the cooling water enters the air-filled sealing ring through the submerged flow passage, the air-filled sealing ring is expanded to form the radial water seal, the double-path sealing guarantee is provided, and the use is safer.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic structural view of a preferred embodiment of a stern shaft two-way sealing device of the utility model;
fig. 2 is a sectional view taken along line a-a of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 2, an embodiment of the present invention includes:
the stern shaft two-way sealing device shown in fig. 1 and 2 comprises: the mounting seat 1, the inflatable seal ring 18, the double-circuit switches over screw 14, inlet tube connects 2, air inlet pipe connects 3, blast pipe connects 5, rotating ring 7, quiet ring 9, elasticity airtight circle 12, quiet ring seat 10 and rotating ring seat 4, sets up the through hole that corresponds with the stern axle in the mounting seat 1, and the mounting seat 1 is installed in the cabin, and the stern axle is through the outside extension of through hole.
As shown in fig. 2, an insertion groove corresponding to the inflatable sealing ring 18 is provided in the through hole, the inflatable sealing ring 18 is provided in the insertion groove, in this embodiment, the insertion groove is located at the tail end of the mounting seat 1, the tail end of the mounting seat 1 is provided with a cover ring 19 corresponding to the insertion groove, and the inflatable sealing ring 18 is limited by the cover ring 19, so that the mounting and dismounting are convenient. In addition, the inflatable sealing ring 18 is provided with a lining ring 15, the lining ring 15 can be made of steel materials, and the basic annular structure of the inflatable sealing ring 18 can be maintained.
The water inlet pipe joint 2 is arranged on the mounting seat 1, a water inlet flow passage 17 for communicating the water inlet pipe joint 2 with the through hole is arranged in the mounting seat 1, and cooling water can be injected into the water inlet pipe joint 2 through a water pump. In this embodiment, the bottom of the mounting base 1 is provided with a drain pipe joint 6, the mounting base 1 is provided with a drain flow passage for communicating the drain pipe joint 6 with the through hole, the cooling water is discharged through the drain pipe joint 6, and the flow rate of the drain pipe joint 6 is controlled to maintain the water pressure in the through hole.
In this embodiment, the stationary ring seat 10 is disposed in front of the mounting seat 1, the elastic airtight ring 12 is disposed between the stationary ring seat 10 and the mounting seat 1, the clamping rings 11 are disposed on two sides of the elastic airtight ring 12, the screw 13 is disposed between the two clamping rings 11 for limiting, and the elastic support between the stationary ring seat 10 and the mounting seat 1 is performed through the elastic airtight ring 12.
In this embodiment, the stationary ring 9 is disposed on the front surface of the stationary ring seat 10, the moving ring seat 4 is disposed on the stern shaft and located in front of the stationary ring seat 10, the moving ring 7 is disposed on the back surface of the moving ring seat 4 and corresponds to the stationary ring 9, sealing is performed by friction between the moving ring 7 and the stationary ring 9, the maximum leakage amount after running-in is ensured to be less than or equal to 3.22L/h, and cooling of the friction part is performed by using cooling water. The movable ring seat 4 can adopt two semicircular tile structures, and is installed on the stern shaft in a hoop mode and rotates along with the stern shaft. An O-shaped sealing strip 8 is arranged in the movable ring 7 and is in contact with the stern shaft for sealing.
When the stern shaft stops rotating and is maintained, the inflatable sealing ring 18 is required to expand to tightly hold the stern shaft to form radial water seal. The air inlet pipe joint 3 and the exhaust pipe joint 5 are oppositely arranged on the mounting seat 1, an air inlet flow channel between the air inlet pipe joint 3 and the embedded groove and an air exhaust flow channel between the exhaust pipe joint 5 and the embedded groove are arranged in the mounting seat 1, the air inlet pipe joint 3 is externally connected with a compressed air supply pipeline or an air pump, the air pump starts to inflate the inflating sealing ring 18 when the stern shaft stops rotating and is maintained, and at the moment, the exhaust pipe joint 5 is closed to maintain pressure or open with small flow to stabilize pressure.
The embedded groove is internally provided with a submerged flow channel 16 extending to the rear part of the water inlet flow channel 17, the front surface of the mounting seat 1 is provided with a threaded hole penetrating through the water inlet flow channel 17 and extending to the submerged flow channel 16, the two-way switching screw 14 is arranged in the threaded hole, and under the normal condition, the two-way switching screw 14 extends to the submerged flow channel 16, so that water in the water inlet flow channel 17 is prevented from entering the submerged flow channel 16. In the present embodiment, the liner ring 15 is provided with ports extending to the outside of the pneumatic seal ring 18 and corresponding to the intake runner, the exhaust runner, and the submerged runner 16 one by one, thereby forming a double circuit.
If the air source is in failure, the double-way switching screw 14 is unscrewed, the water inlet flow channel 17 and the submerged flow channel 16 are communicated, cooling water enters the inflatable sealing ring 18 through the submerged flow channel 16, the inflatable sealing ring 18 is expanded to form radial water sealing temporarily, double-way sealing guarantee is provided, and the use is safer.
In conclusion, the twin-path sealing device for the stern shaft can utilize the water path or the gas path to expand the inflatable sealing ring, so that the sealing effect of the stern shaft during the stop and maintenance is ensured, the switching operation of the water path and the gas path is simple and convenient, and the reaction is rapid.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, or direct or indirect applications in other related fields, which are made by the contents of the present specification, are included in the scope of the present invention.
Claims (6)
1. A stern shaft double-way sealing device for sealing a stern shaft is characterized by comprising: the mounting seat is internally provided with a through hole corresponding to a stern shaft, an embedded groove corresponding to the inflatable sealing ring is arranged in the through hole, the inflatable sealing ring is arranged in the embedded groove, the water inlet pipe joint is arranged on the mounting seat, a water inlet flow channel communicated with the water inlet pipe joint and the through hole is arranged in the mounting seat, the air inlet pipe joint and the exhaust pipe joint are oppositely arranged on the mounting seat, the mounting seat is internally provided with an air inlet flow channel positioned between the air inlet pipe joint and the embedded groove and an exhaust flow channel positioned between the exhaust pipe joint and the embedded groove, the embedded groove is internally provided with a subsurface flow channel extending to the rear of the water inlet flow channel, the front surface of the mounting seat is provided with a threaded hole penetrating through the water inlet flow channel and extending to the subsurface flow channel, and the double-way switching screw is arranged in the threaded hole, and the lining ring is provided with ports which extend to the outer side of the inflatable sealing ring and correspond to the air inlet flow passage, the exhaust flow passage and the submerged flow passage one by one.
2. The stern shaft two-way sealing device as claimed in claim 1, wherein the embedded groove is located at the tail end of the mounting seat, and the tail end of the mounting seat is provided with a cover ring corresponding to the embedded groove.
3. The stern shaft two-way sealing device as claimed in claim 1, wherein the bottom of the mounting seat is provided with a drain pipe joint, and the mounting seat is provided with a drain flow passage which is communicated with the drain pipe joint and the through hole.
4. The twin sealing device for the stern shaft according to claim 1, further comprising a moving ring, a stationary ring, an elastic airtight ring, a stationary ring seat and a moving ring seat, wherein the stationary ring seat is arranged in front of the mounting seat, the elastic airtight ring is arranged between the stationary ring seat and the mounting seat, the stationary ring is arranged on the front of the stationary ring seat, the moving ring seat is arranged on the stern shaft and in front of the stationary ring seat, and the moving ring is arranged on the back of the moving ring seat and corresponds to the stationary ring.
5. The stern shaft two-way sealing device as claimed in claim 4, wherein the elastic airtight ring is provided with clamping rings at two sides, and a screw is arranged between the two clamping rings.
6. The stern shaft double-way sealing device as claimed in claim 4, wherein an O-shaped sealing strip is arranged in the movable ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121297046.6U CN215410196U (en) | 2021-06-10 | 2021-06-10 | Twin-channel sealing device for stern shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121297046.6U CN215410196U (en) | 2021-06-10 | 2021-06-10 | Twin-channel sealing device for stern shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215410196U true CN215410196U (en) | 2022-01-04 |
Family
ID=79638295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121297046.6U Active CN215410196U (en) | 2021-06-10 | 2021-06-10 | Twin-channel sealing device for stern shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215410196U (en) |
-
2021
- 2021-06-10 CN CN202121297046.6U patent/CN215410196U/en active Active
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