WO2014017285A1 - 船尾管シール装置 - Google Patents
船尾管シール装置 Download PDFInfo
- Publication number
- WO2014017285A1 WO2014017285A1 PCT/JP2013/068653 JP2013068653W WO2014017285A1 WO 2014017285 A1 WO2014017285 A1 WO 2014017285A1 JP 2013068653 W JP2013068653 W JP 2013068653W WO 2014017285 A1 WO2014017285 A1 WO 2014017285A1
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- WO
- WIPO (PCT)
- Prior art keywords
- seal ring
- ring chamber
- seal
- chamber
- fresh water
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/36—Shaft tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/002—Sealings comprising at least two sealings in succession
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/324—Arrangements for lubrication or cooling of the sealing itself
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3448—Pressing means the pressing force resulting from fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3456—Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
- B63H2023/327—Sealings specially adapted for propeller shafts or stern tubes
Definitions
- the present invention relates to a stern tube sealing device that seals the outer periphery of a propeller shaft of a ship.
- FIG. 4 is a diagram showing a schematic configuration of a stern tube sealing device according to a conventional example.
- a first seal ring chamber 411 and a second seal ring chamber 412 are formed in a seal housing 410 through which the propeller shaft 200 is inserted.
- the second seal ring chamber 412 is located inside the ship with respect to the first seal ring chamber 411.
- a first seal ring 421 is disposed in the first seal ring chamber 411.
- a second seal ring 422 is disposed in the second seal ring chamber 412.
- the first seal ring 421 and the second seal ring 422 are fixed to the propeller shaft 200 and rotate together with the propeller shaft 200.
- the first seal ring 421 has a seal surface 421a that is in contact with the inner wall surface of the first seal ring chamber 411 and slides against the wall surface.
- the second seal ring 422 has a seal surface 422a that is in contact with the inner wall surface of the second seal ring chamber 412 and slides relative to the wall surface.
- the first seal ring chamber 411 communicates with the outside of the ship. Further, the first seal ring chamber 411 and the second seal ring chamber 412 communicate with each other through a sliding portion between the wall surface of the first seal ring chamber 411 and the seal surface 421a of the first seal ring 421.
- At least one of the seal surfaces 421 a and 422 a of the first seal ring 421 or the second seal ring 422 is a wall surface inside the ship in the first seal ring chamber 411 or the second seal ring chamber 412. Sealing performance is exhibited by maintaining a close state.
- seawater SW is introduced into the first seal ring chamber 411 and the second seal ring chamber 412 through the first seawater introduction pipe 431 or the second seawater introduction pipe 432, respectively.
- the seal rings 421 and 422 can be cooled by the seawater filled in the seal ring chambers 411 and 412.
- the stern tube seal device is configured such that each seal ring is fixed to the seal housing side in each seal ring chamber and the seal surface of the seal ring slides in contact with the outer peripheral surface of the propeller shaft.
- the slurry may enter the sliding portion between the seal surface of each seal ring and the outer peripheral surface of the propeller shaft.
- there are problems that the sealability is deteriorated due to the accumulation of the slurry on the sliding portion and that the wall surface of the propeller shaft is worn by the slurry.
- the above problems are not limited to the case where seawater is introduced into the seal ring chamber, but in the stern tube sealing device of a ship used in a river or the like, the water in the seal ring chamber (i.e., outside the ship) Even when water is introduced, it can naturally occur if the slurry is mixed in the water of a river or the like.
- a stern tube sealing device for sealing an outer periphery of a propeller shaft of a ship, A seal housing through which the propeller shaft is inserted; A first seal ring that is disposed in a first seal ring chamber formed in the seal housing and has a seal surface that slides against a wall surface of the first seal ring chamber or an outer peripheral surface of the propeller shaft; The seal housing is disposed in a second seal ring chamber formed inside the ship from the first seal ring chamber, and slides on a wall surface of the second seal ring chamber or an outer peripheral surface of the propeller shaft.
- a second seal ring having a sealing surface
- the first seal ring chamber communicates with the outboard;
- the first seal ring chamber and the second seal ring chamber communicate with each other through a sliding portion between the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the first seal ring.
- the first seal ring chamber is filled with outboard water
- the second seal ring chamber is filled with fresh water.
- the second seal ring chamber is filled with fresh water not mixed with slurry. Therefore, it is possible to suppress the accumulation of slurry on the sliding portion between the wall surface of the second seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the second seal ring.
- the first seal ring chamber and the second seal ring are connected to each other through the sliding portion between the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the first seal ring.
- the seal ring chamber is in communication. Therefore, the fresh water filled in the second seal ring chamber enters the sliding portion between the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the first seal ring, and flows out to the first seal ring chamber. To do.
- the sliding between the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the first seal ring It becomes difficult for the slurry to enter the part. Therefore, according to the present invention, it is possible to prevent the slurry from being deposited on the sliding portion between the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the first seal ring.
- the fresh water pressure in the second seal ring chamber may be higher than the water pressure in the first seal ring chamber.
- the fresh water filled in the second seal ring chamber enters the sliding portion between the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the first seal ring, and the first seal It becomes easy to flow out to the ring chamber side. Therefore, the slurry contained in the outboard water filled in the first seal ring chamber is difficult to enter due to the sliding portion between the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the first seal ring. Become. Therefore, it is possible to more effectively suppress the slurry from being deposited on these sliding portions.
- the fresh water pressure in the second seal ring chamber may be lower than the water pressure in the first seal ring chamber.
- the seal surface of the first seal ring is strongly pressed against the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft by the water pressure in the first seal ring chamber. Therefore, the slurry contained in the outboard water filled in the first seal ring chamber is difficult to enter due to the sliding portion between the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the first seal ring. Become. Therefore, it is possible to more effectively suppress the slurry from being deposited on these sliding portions.
- the fresh water filled in the second seal ring chamber is also difficult to enter the sliding portion between the seal surface of the first seal ring and the wall surface of the first seal ring chamber or the outer peripheral surface of the propeller shaft. . That is, it becomes difficult for fresh water to flow out from the second seal ring chamber to the first seal ring chamber. Therefore, it becomes possible to reduce the supply amount of fresh water into the second seal ring chamber.
- the clear water in the second seal ring chamber is difficult to decrease. Therefore, in the above case, a configuration may be adopted in which fresh water is sealed in the second seal ring chamber. According to this, it becomes unnecessary to provide a device for additionally supplying fresh water into the second seal ring chamber and a device for discharging fresh water from the second seal ring chamber. Therefore, the structure of the stern tube sealing device can be further simplified.
- the stern tube sealing device in the stern tube sealing device, it is possible to prevent the slurry contained in the water outside the ship from accumulating on the sliding portion between the wall surface of the seal ring chamber or the outer peripheral surface of the propeller shaft and the seal surface of the seal ring. be able to.
- FIG. 1 is a diagram showing a schematic configuration of a stern tube sealing apparatus according to the present embodiment.
- FIG. 2 is a schematic cross-sectional view of a seal ring provided in the stern tube sealing device according to this embodiment.
- the left side is the outboard side (stern side) and the right side is the inboard side (bow side).
- the stern tube sealing device according to the present embodiment is for a ship used in the ocean. That is, the outboard water is seawater.
- the stern tube sealing device according to the present invention can also be applied to a stern tube sealing device for ships used in rivers and the like.
- the propeller shaft 200 is inserted through the seal housing 110.
- a propeller (not shown) is provided at the tip of the propeller shaft 200 on the outer side of the ship.
- the seal housing 110 is configured by fastening a seal case 110a, a first mating ring 110b, and a second mating ring 110c with bolts or the like.
- An O-ring 113 is interposed between the seal case 110a and the first mating ring 110b, and the space between them is sealed by the O-ring 113.
- an O-ring 114 is interposed between the first mating ring 110b and the second mating ring 110c, and the space between them is sealed by the O-ring 114.
- the inner peripheral surfaces of the seal case 110 a, the first mating ring 110 b, and the second mating ring 110 c are arranged at a position with a predetermined gap from the outer peripheral surface of the propeller shaft 200. That is, a predetermined interval is provided between the inner peripheral surface of the seal housing 110 and the outer peripheral surface of the propeller shaft 200.
- a first seal ring chamber 111 is formed by an annular space surrounded by the wall surface of the recess of the seal case 110a and the wall surface of the first mating ring 110b on the seal case 110a side.
- annular recess along the outer peripheral surface of the propeller shaft 200 is also formed on the second mating ring 110c side on the inner peripheral surface of the first mating ring 110b.
- a second seal ring chamber 112 is formed by an annular space surrounded by the wall surface of the recess of the first mating ring 110b and the wall surface of the second mating ring 110c on the first mating ring 110b side. That is, in the seal housing 110, the second seal ring chamber 112 is located on the inner side of the ship than the first seal ring chamber 111.
- a first seal ring 121 is disposed in the first seal ring chamber 111.
- a second seal ring 122 is disposed in the second seal ring chamber 112.
- the first seal ring 121 and the second seal ring 122 are fixed to the propeller shaft 200 by garter springs 123 and 124, respectively, and rotate together with the propeller shaft 200.
- Each seal ring 121, 122 has lip portions 121b, 122b.
- the lip portion 121b of the first seal ring 121 is in contact with the inner wall surface of the first seal ring chamber 111 (that is, the wall surface of the first mating ring 110b on the seal case 110a side).
- a surface in contact with the wall surface of the first seal ring chamber 111 in the lip 121 b is a seal surface 121 a that slides on the wall surface of the first seal ring chamber 111.
- the lip portion 122b of the second seal ring 122 is in contact with the inner wall surface of the second seal ring chamber 112 (that is, the wall surface on the first mating ring 110b side of the second mating ring 110c).
- a surface in contact with the wall surface of the second seal ring chamber 112 in the lip portion 122 b is a seal surface 121 a that slides on the wall surface of the second seal ring chamber 112.
- first seal ring chamber 111 and the outboard are in communication. Further, the first seal ring chamber 111 and the second seal ring chamber 112 communicate with each other through a sliding portion between the seal surface 121 a of the first seal ring 121 and the wall surface of the first seal ring chamber 111.
- At least one of the seal surfaces 121a and 122a of the first seal ring 121 or the second seal ring 122 is the wall surface of the first seal ring chamber 111 or the second seal ring chamber 112. Sealing performance is exhibited by maintaining a close state.
- Another recess is formed on the inner periphery of the seal case 110a on the outer side of the ship from the recess forming the first seal ring chamber 111.
- An inflatable seal 130 is installed in the recess.
- An air introduction pipe 160 is connected to the inflatable seal 130.
- the air introduction pipe 160 is provided with a valve 161.
- the valve 161 When the valve 161 is opened, compressed air is sent to the inflatable seal 130 through the air introduction pipe 160. When compressed air is fed into the inflatable seal 130, the inflatable seal 130 expands. Then, the swelled inflatable seal 130 is brought into close contact with the outer peripheral surface of the propeller shaft 200, whereby the outer periphery of the propeller shaft 200 is sealed.
- the inflatable seal 130 is mainly used when the seal rings 121 and 122 are inspected.
- a seawater introduction pipe 141 is connected to the first seal ring chamber 111, and a fresh water introduction pipe 142 is connected to the second seal ring chamber 112.
- the seawater SW pumped from the outside of the ship is introduced into the first seal ring chamber 111 through the seawater introduction pipe 141.
- the seawater introduction pipe 141 is provided with a flow rate adjustment valve 143.
- the flow rate adjustment valve 143 adjusts the flow rate of the seawater SW introduced into the first seal ring chamber 111.
- the seawater pressure in the first seal ring chamber 111 can be adjusted by adjusting the flow rate of the seawater SW introduced into the first seal ring chamber 111.
- a drain pipe 151 is connected to the first seal ring chamber 111.
- a drain valve 153 is provided in the drain pipe 151. By opening the drain valve 153, the seawater SW can be discharged from the first seal ring chamber 111 through the drain pipe 151.
- the end of the fresh water introduction pipe 142 opposite to the end connected to the second seal ring chamber 112 is connected to a fresh water tank 145 that is installed in the ship and in which fresh water W is stored. Then, the fresh water W stored in the fresh water tank 145 is introduced into the second seal ring chamber 112 through the fresh water introduction pipe 142.
- the fresh water introduction pipe 142 is provided with a flow rate adjusting valve 144.
- the flow rate of the fresh water W introduced into the second seal ring chamber 112 is adjusted by the flow rate adjusting valve 144.
- the fresh water pressure in the second seal ring chamber 112 can be adjusted by adjusting the flow rate of the fresh water W introduced into the second seal ring chamber 112.
- the method for supplying fresh water is not limited to the above-described fresh water tank. For example, in the case of a ship having a fresh water supply line, fresh water is supplied directly from the fresh water supply line to the second seal chamber via a flow rate adjusting valve. May be.
- a drain pipe 152 is connected to the second seal ring chamber 112.
- a drain valve 154 is provided in the drain pipe 152. By opening the drain valve 154, the fresh water W can be discharged from the second seal ring chamber 112 through the drain pipe 152.
- seawater SW is introduced into the first seal ring chamber 111, and fresh water W is introduced into the second seal ring chamber 112.
- the seal rings 121 and 122 can be cooled by the seawater SW or the fresh water W filled in the seal ring chambers 111 and 112.
- the second seal ring chamber 112 is filled with fresh water not mixed with slurry. Therefore, it is possible to prevent the slurry from being deposited on the sliding portion between the wall surface of the second seal ring chamber 112 and the seal surface 122a of the second seal ring 122.
- the first seal ring chamber 111 and the second seal ring chamber 112 are interposed via sliding portions between the seal surface 121a of the first seal ring 121 and the wall surface of the first seal ring chamber 111.
- the state in which the sliding portion is in communication is an object to be sealed between the seal surface 121a and the wall surface of the first seal ring chamber 111 as long as the sealing performance by the sliding portion is not affected.
- the seal surface 121a and the wall surface of the first seal ring chamber 111 are in contact with each other so that the seawater SW or the fresh water W is allowed to enter.
- the fluid to be sealed is allowed to leak to a certain extent to the sliding portion, and the sealing target fluid is interposed between the seal surface 121a and the wall surface of the first seal ring chamber 111, thereby lubricating the sliding portion.
- the fresh water filled in the second seal ring chamber 112 is configured to enter the sliding portion between the wall surface of the first seal ring chamber 111 and the seal surface 121 a of the first seal ring 121.
- the lubricity of the sliding part between the wall surface of the first seal ring chamber 111 and the seal surface 121a of the first seal ring 121 can be enhanced by fresh water.
- the first seal ring chamber is caused by the flow of fresh water from the second seal ring chamber 112 side to the first seal ring chamber 111 side.
- the slurry is difficult to enter the sliding portion between the wall surface 111 and the seal surface 121 a of the first seal ring 121. Therefore, it is possible to suppress the slurry from being deposited on the sliding portion between the wall surface of the first seal ring chamber 111 and the seal surface 121a of the first seal ring 121.
- the slurry prevents the contact portions of the wall surfaces of the seal ring chambers 111 and 112 (that is, the wall surfaces of the mating rings 110b and 110c) with the seal surfaces 121a and 122a from being worn.
- the fresh water pressure in the second seal ring chamber 112 may be higher than the seawater pressure in the first seal ring chamber 111.
- the fresh water W filled in the second seal ring chamber 112 enters the sliding portion between the wall surface of the first seal ring chamber 111 and the seal surface 121 a of the first seal ring 121, and the first seal ring chamber 111. It tends to flow out to the side. Therefore, the slurry contained in the seawater SW filled in the first seal ring chamber 111 is difficult to enter due to the sliding portion between the wall surface of the first seal ring chamber 111 and the seal surface 121 a of the first seal ring 121. Therefore, it is possible to more effectively suppress the slurry from being deposited on these sliding portions.
- the installation position of the fresh water tank 145 in the ship is set higher than the water line so that the static water in the second seal ring chamber 112 can be maintained.
- the water pressure can be increased.
- the fresh water pressure in the second seal ring chamber 112 may be lower than the seawater pressure in the first seal ring chamber 111.
- the seal surface 121a of the first seal ring 121 is strongly pressed against the wall surface of the first seal ring chamber 111 by seawater pressure in the first seal ring chamber 111. Therefore, the amount of lifting from the wall surface of the first seal ring chamber 111 of the lip portion 121b of the first seal ring 121 is reduced. Therefore, the slurry contained in the seawater SW filled in the first seal ring chamber 111 is difficult to enter due to the sliding portion between the wall surface of the first seal ring chamber 111 and the seal surface 121 a of the first seal ring 121. Therefore, it is possible to more effectively suppress the slurry from being deposited on these sliding portions.
- the fresh water W filled in the second seal ring chamber 112 is difficult to enter the sliding portion between the seal surface 121a of the first seal ring 121 and the wall surface of the first seal ring chamber 111. That is, it becomes difficult for the fresh water W to flow out from the second seal ring chamber 112 to the first seal ring chamber 111. Therefore, the supply amount of fresh water W into the second seal ring chamber 112 can be reduced. Thereby, the consumption of the fresh water W stored in the fresh water tank 145 can be suppressed.
- FIG. 3 is a diagram showing a schematic configuration of a stern tube sealing device according to this modification.
- the stern tube sealing device 300 according to this modification is different from the stern tube sealing device 100 according to the above embodiment in that fresh water W is enclosed in the second seal ring chamber 112.
- the fresh water pressure in the second seal ring chamber 112 is lower than the seawater pressure in the first seal ring chamber 111. Accordingly, as in [Example 2 of water pressure in the seal ring chamber] in the above embodiment, the fresh water W is unlikely to flow out from the second seal ring chamber 112 to the first seal ring chamber 111. The decrease of the fresh water W enclosed in the chamber 112 is suppressed. Further, the slurry contained in the seawater SW filled in the first seal ring chamber 111 is difficult to enter due to the sliding portion between the wall surface of the first seal ring chamber 111 and the seal surface 121 a of the first seal ring 121.
- a device for introducing fresh water W into the second seal ring chamber 112 that is, the fresh water introduction pipe 142, the flow rate adjustment valve 144, and the fresh water tank 145 in FIG. 1 and the second It is not necessary to provide a device for discharging the fresh water W from the seal ring chamber 112 (that is, the drain pipe 152 and the drain valve 154 in FIG. 1). Therefore, the structure of the stern tube sealing device 300 can be simplified.
- the seal rings 121 and 122 are fixed to the propeller shaft 200 side, and the seal surfaces 121a and 122a slide on the wall surfaces of the seal ring chambers 111 and 112, respectively. It was configured to move.
- the present invention can also be applied to a stern tube sealing device in which each seal ring is fixed to the seal housing side in each seal ring chamber and the seal surface slides with respect to the outer peripheral surface of the propeller shaft. it can.
- seawater may be filled in the seal ring chamber on the outside of the boat, and fresh water may be filled in the seal ring chamber on the inside of the boat. According to this, the slurry contained in the seawater hardly enters the sliding portion between the outer peripheral surface of the propeller shaft and the seal surface of each seal ring. Therefore, it is possible to suppress the accumulation of slurry on these sliding portions.
- the fresh water pressure in the seal ring chamber on the inside of the ship may be made higher than the seawater pressure in the seal ring chamber on the outside of the ship as in the case of the above embodiment. According to this, the same effect as [Example 1 of water pressure in the seal ring chamber] in the above embodiment can be obtained. Further, the fresh water pressure in the seal ring chamber inside the ship may be set lower than the seawater pressure in the seal ring chamber outside the ship. According to this, the same effect as [Example 2 of water pressure in the seal ring chamber] in the above embodiment can be obtained.
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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Abstract
Description
前記プロペラ軸が挿通されたシールハウジングと、
前記シールハウジングに形成された第一シールリングチャンバ内に配設され、前記第一シールリングチャンバの壁面又は前記プロペラ軸の外周面に対して摺動するシール面を有する第一シールリングと、
前記シールハウジングにおける前記第一シールリングチャンバよりも船内側に形成された第二シールリングチャンバ内に配設され、前記第二シールリングチャンバの壁面又は前記プロペラ軸の外周面に対して摺動するシール面を有する第二シールリングと、を備え、
前記第一シールリングチャンバと船外とが連通しており、
前記第一シールリングチャンバの壁面又は前記プロペラ軸の外周面と前記第一シールリングのシール面との摺動部を介して前記第一シールリングチャンバと前記第二シールリングチャンバとが連通している船尾管シール装置において、
前記第一シールリングチャンバ内に船外の水が充填され、
前記第二シールリングチャンバ内に清水が充填されている。
本発明の実施例に係る船尾管シール装置について図1,2を参照して説明する。図1は、本実施例に係る船尾管シール装置の概略構成を示す図である。図2は、本実施例に係る船尾管シール装置に設けられたシールリングの模式的断面図である。尚、図1においては、左側が船外側(船尾側)であり、右側が船内側(船首側)である。
本実施例に係る構成では、第一シールリングチャンバ111内には海水SWが導入され、第二シールリングチャンバ112内には清水Wが導入される。これにより、各シールリングチャンバ111,112内に充填された海水SW又は清水Wによって、シールリング121,122を冷却することができる。
本実施例に係る船尾管シール装置100においては、第二シールリングチャンバ112内の清水圧を第一シールリングチャンバ111内の海水圧よりも高くしてもよい。
本実施例に係る船尾管シール装置100においては、第二シールリングチャンバ112内の清水圧を第一シールリングチャンバ111内の海水圧よりも低くしてもよい。
本実施例の変形例に係る船尾管シール装置について図3を参照して説明する。図3は、本変形例に係る船尾管シール装置の概略構成を示す図である。
上記実施例に係る船尾管シール装置100,300は、各シールリング121,122がプロペラ軸200側に固定され、それらのシール面121a,122aが各シールリングチャンバ111,112の壁面に対して摺動する構成とした。しかしながら、各シールリングが各シールリングチャンバ内においてシールハウジング側に固定され、それらのシール面がプロペラ軸の外周面に対して摺動する構成の船尾管シール装置にも本発明を適用することができる。
110・・シールハウジング
110a・・シールケース
110b・・第一メイティングリング
110c・・第二メイティングリング
111・・第一シールリングチャンバ
112・・第二シールリングチャンバ
121・・第一シールリング
122・・第二シールリング
121a,122a・・シール面
122b,122b・・リップ部
141・・海水導入管
142・・清水導入管
143,144・・流量調整バルブ
145・・清水タンク
Claims (4)
- 船舶のプロペラ軸の外周を封止する船尾管シール装置であって、
前記プロペラ軸が挿通されたシールハウジングと、
前記シールハウジングに形成された第一シールリングチャンバ内に配設され、前記第一シールリングチャンバの壁面又は前記プロペラ軸の外周面に対して摺動するシール面を有する第一シールリングと、
前記シールハウジングにおける前記第一シールリングチャンバよりも船内側に形成された第二シールリングチャンバ内に配設され、前記第二シールリングチャンバの壁面又は前記プロペラ軸の外周面に対して摺動するシール面を有する第二シールリングと、を備え、
前記第一シールリングチャンバと船外とが連通しており、
前記第一シールリングチャンバの壁面又は前記プロペラ軸の外周面と前記第一シールリングのシール面との摺動部を介して前記第一シールリングチャンバと前記第二シールリングチャンバとが連通している船尾管シール装置において、
前記第一シールリングチャンバ内に船外の水が充填され、
前記第二シールリングチャンバ内に清水が充填された船尾管シール装置。 - 前記第二シールリングチャンバ内の清水圧が前記第一シールリングチャンバ内の水圧よりも高い請求項1に記載の船尾管シール装置。
- 前記第二シールリングチャンバ内の清水圧が前記第一シールリングチャンバ内の水圧よりも低い請求項1に記載の船尾管シール装置。
- 前記第二シールリングチャンバ内に清水が封入されている請求項3に記載の船尾管シール装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2014526844A JP6199290B2 (ja) | 2012-07-27 | 2013-07-08 | 船尾管シール装置 |
EP13822252.6A EP2878865B1 (en) | 2012-07-27 | 2013-07-08 | Stern tube sealing device |
CN201380006538.7A CN104067037B (zh) | 2012-07-27 | 2013-07-08 | 艉管密封装置 |
US14/375,563 US9868502B2 (en) | 2012-07-27 | 2013-07-08 | Stern tube sealing device |
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JP2012167520 | 2012-07-27 | ||
JP2012-167520 | 2012-07-27 |
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WO2014017285A1 true WO2014017285A1 (ja) | 2014-01-30 |
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PCT/JP2013/068653 WO2014017285A1 (ja) | 2012-07-27 | 2013-07-08 | 船尾管シール装置 |
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US (1) | US9868502B2 (ja) |
EP (1) | EP2878865B1 (ja) |
JP (1) | JP6199290B2 (ja) |
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CN106628092A (zh) * | 2017-03-07 | 2017-05-10 | 合肥倍豪海洋装备技术有限公司 | 一种全回转式舵桨用密封系统 |
CN112594099B (zh) * | 2020-11-26 | 2022-10-28 | 中国船舶重工集团公司第七0五研究所 | 一种多航态航行器进气管 |
EP4321778A1 (en) * | 2021-04-08 | 2024-02-14 | EagleBurgmann Japan Co., Ltd. | Shaft sealing device |
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Also Published As
Publication number | Publication date |
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CN104067037A (zh) | 2014-09-24 |
CN104067037B (zh) | 2016-10-26 |
EP2878865A4 (en) | 2016-03-09 |
EP2878865A1 (en) | 2015-06-03 |
JPWO2014017285A1 (ja) | 2016-07-07 |
US9868502B2 (en) | 2018-01-16 |
JP6199290B2 (ja) | 2017-09-20 |
EP2878865B1 (en) | 2018-03-21 |
US20150137458A1 (en) | 2015-05-21 |
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