WO2020235380A1 - シール装置 - Google Patents
シール装置 Download PDFInfo
- Publication number
- WO2020235380A1 WO2020235380A1 PCT/JP2020/018852 JP2020018852W WO2020235380A1 WO 2020235380 A1 WO2020235380 A1 WO 2020235380A1 JP 2020018852 W JP2020018852 W JP 2020018852W WO 2020235380 A1 WO2020235380 A1 WO 2020235380A1
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- WIPO (PCT)
- Prior art keywords
- chamber
- pressure
- lubricating oil
- supplied
- sealing device
- Prior art date
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Classifications
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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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
- F16C33/741—Sealings of sliding-contact bearings by means of a fluid
- F16C33/743—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
-
- 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
-
- 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
- F16J15/004—Sealings comprising at least two sealings in succession forming of recuperation chamber for the leaking fluid
-
- 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
- F16J15/006—Sealings comprising at least two sealings in succession with division of the 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
-
- 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 sealing device that seals a relative rotating portion of a rotating machine applied to a ship propulsion machine, a tidal current generator, or the like.
- a sealing device provided in a rotating machine provided in a ship's propulsion machine, a tidal current generator, or the like is sealed with an annular gap formed at a relative rotating point, so that a fluid to be sealed in the machine such as lubricating oil can be used. Some prevent leakage to the outside and prevent external fluid such as seawater from entering the aircraft.
- the sealing device applied to a ship propulsion machine disclosed in Patent Document 1 is a liner that is held in a housing having a shaft hole through which a rotating shaft for propulsion is inserted and is externally fitted to the rotating shaft.
- Three seal rings that slide in contact with the outer peripheral surface are provided side by side in the axial direction, and air is supplied to the primary annular chamber formed between the pair of seal rings provided on the outside of the ship among these seal rings.
- lubricating oil is supplied to the secondary annular chamber formed between the pair of seal rings provided on the inside of the ship.
- the amount of air supplied to the primary annular chamber is adjusted so that it is maintained at the internal pressure obtained by adding the tightening pressure of the seal ring to the sea water pressure, and the secondary annular chamber is the primary via the seal ring.
- the supply amount of lubricating oil so that the internal pressure required to blow the air supplied to the annular chamber to the outside of the ship is adjusted, the internal pressure of the primary annular chamber and the secondary annular chamber constantly fluctuates in seawater pressure. Since it is adjusted according to the minute, it is highly responsive to fluctuations in seawater pressure and can prevent seawater from entering the ship.
- JP-A-11-304005 (Page 4, Fig. 2)
- the sealing device of Patent Document 1 prevents seawater from entering the ship by blowing air out of the ship from the primary ring chamber by utilizing the internal pressure of the secondary ring chamber to which the lubricating oil is supplied.
- the internal pressure of the secondary annular chamber is always adjusted to be higher than the internal pressure of the primary annular chamber, if a problem occurs with these seal rings, the high-pressure lubricating oil in the secondary annular chamber will release the seal ring. There was a risk that the lubricating oil would leak out of the ship by invading the primary annular chamber and blowing the lubricating oil from the primary annular chamber to the outside of the ship at a low pressure together with air.
- the present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a sealing device capable of surely preventing leakage of the sealed fluid to the outside of the machine.
- the sealing device of the present invention It is provided at a relative rotation point between the first member and the second member that rotates with respect to the first member.
- a first sealing means facing the external fluid and a second sealing means juxtaposed with the first sealing means and facing the fluid to be sealed in the machine are provided.
- intermediate sealing means are arranged side by side with the first sealing means and the second sealing means.
- a gas chamber to which a gas having a pressure higher than that of the external fluid is supplied is formed between the first sealing means and the intermediate sealing means.
- An intermediate chamber is formed between the intermediate sealing means and the second sealing means to which a gas having a lower pressure than the gas supplied to the gas chamber and a lower pressure than the sealed fluid is supplied.
- the second sealing means is a lip seal, and the lip portion may be arranged so as to be pressed against the second member by the fluid to be sealed. According to this, since the pressure of the sealed fluid having a higher pressure than the gas in the intermediate chamber can act as the tightening pressure of the lip seal, it is difficult for the sealed fluid to enter the intermediate chamber.
- the intermediate chamber may be communicated with the collection chamber via a communication passage. According to this, the sealed fluid that has entered the intermediate chamber is collected in the recovery chamber through the communication passage, so that the sealed fluid in the intermediate chamber can be easily discharged to the recovery chamber, which is a separate chamber. Leakage to the outside can be further prevented.
- the communication passage may be provided with a check valve for preventing backflow to the intermediate chamber side. According to this, it is possible to prevent the sealed fluid recovered in the recovery chamber from flowing back to the intermediate chamber through the communication passage.
- a pressure-controlled compressed gas may be supplied to the intermediate chamber. According to this, the differential pressure between the gas supplied to the gas chamber and the sealed fluid can be properly maintained.
- the compressed gas may be compressed air. According to this, it is easy to handle and safety can be ensured.
- the sealed fluid may be controlled at a lower pressure than the external fluid. According to this, the sealed fluid that has entered the intermediate chamber is unlikely to leak to the outside of the machine.
- FIGS. 1 and 2 The sealing device according to the first embodiment will be described with reference to FIGS. 1 and 2.
- a sealing device for a propulsion machine of a ship will be described as an example.
- the left side of the paper surface of FIGS. 1 and 2 will be described as the stern side (outside of the ship) of the sealing device
- the right side of the paper surface of FIGS. 1 and 2 will be described as the bow side (inside of the ship) of the sealing device.
- FIGS. 2 and 4 the hatching of the housing and the like is omitted, and the compressed air and the lubricating oil supplied and stored in each chamber are schematically shown by hatching.
- the sealing device 1 is a shaft sealing device for a propulsion machine of a ship, and is a stern tube 100 through which a propeller shaft 2 having a propeller 3 for propulsion is inserted. It prevents the lubricating oil as a sealed fluid that is attached from the stern side and is supplied into the stern pipe 100 that constitutes the hull for lubrication of the propeller shaft 2 and the bearing (not shown) from leaking to the outside, and also outside. It is used to prevent seawater W as a fluid from entering the ship.
- the sealing device 1 constitutes a stern pipe sealing system by being connected to an air control unit 120, a lubricating oil circulation unit 130 and a recovery unit 140 provided in the ship by pipelines, respectively.
- the sealing device 40 provided in the ship is a shaft sealing device attached to the stern pipe 100 from the bow side to prevent the lubricating oil supplied into the stern pipe 100 from entering the machine room.
- the stern side sealing device 1 will be described, and the bow side sealing device 40 will be omitted.
- the sealing device 1 has a relative rotation position between the housing 10 as the first member and the liner 4 constituting the propeller shaft 2 as the second member that rotates with respect to the housing 10.
- the first lip seal 21 as the first sealing means facing the seawater W outside the ship and the lubrication that fills the oil chamber 33 in the stern pipe 100 and are arranged side by side on the inside of the ship from the first lip seal 21.
- the housing 10 is in a state in which the first divided housing 10a, the second divided housing 10b, the third divided housing 10c, and the fourth divided housing 10d are fitted to each other in the axial direction in order from the stern side. It is formed in a substantially cylindrical shape by being integrally connected by bolts or the like (not shown). The housing 10 is fixed by bolts or the like (not shown) in a state where the flange portion formed in the fourth divided housing 10d on the bow side is in contact with the stern pipe 100 from the stern side.
- the outer diameter portion of the first lip seal 21 is held in a substantially sealed shape between the first divided housing 10a and the second divided housing 10b, and the second divided housing 10b and the third divided housing 10b are held.
- the outer diameter portion of the intermediate lip seal 22 is held substantially sealed between the 10c and the third split housing 10c, and the outer diameter portion of the second lip seal 23 is between the third split housing 10c and the fourth split housing 10d. It is held in a substantially sealed shape.
- a through hole forming a portion is formed, and the second divided housing 10b is formed with a supply port 11a communicating with the first air supply path 11 on the upper side of the inner peripheral surface.
- the third divided housing 10c and the fourth divided housing 10d have through holes forming a part of the second air supply path 12 communicating between the air control unit 120 and the second annular chamber 32 as an intermediate chamber.
- the third divided housing 10c is formed with a supply port 12a communicating with the second air supply path 12 on the upper side of the inner peripheral surface.
- the third division housing 10c and the fourth division housing 10d are formed with through holes forming a part of the communication passage 14 communicating between the second annular chamber 32 and the recovery unit 140, and the third division housing 10c and the fourth division housing 10d are formed.
- the housing 10c is formed with a discharge port 14a communicating with the communication passage 14 on the lower side of the inner peripheral surface.
- these lip seals 21, 22, 23 are formed of an elastic material such as fluororubber or nitrile rubber, which has excellent water resistance and oil resistance. Since each of the lip seals 21, 22, and 23 of this embodiment has a well-known configuration, detailed description thereof will be omitted.
- the lip seals 21, 22, and 23 are arranged side by side in the axial direction with the outer diameter portion held substantially sealed in the housing 10, and extend in the inner diameter side and in the axial direction toward the high pressure side.
- the first lip seal 21 and the intermediate lip seal 22 are separated from each other.
- the first annular chamber 31 is formed, and the second annular chamber 32 is formed between the intermediate lip seal 22 and the second lip seal 23.
- an annular oil chamber 33 is formed between the second lip seal 23 and the lip seal 41 on the stern side of the seal device 40 on the bow side.
- compressed air as a compressed gas adjusted to a higher pressure than seawater W is supplied from the air control unit 120 to the first annular chamber 31 via the first air supply path 11. Further, in the second annular chamber 32, the pressure is lower than the compressed air supplied from the air control unit 120 to the first annular chamber 31 via the second air supply passage 12, and the lubricating oil circulation unit 130 is inside the stern pipe 100. Compressed air as a compressed gas adjusted to a lower pressure than the lubricating oil supplied to the oil chamber 33 is supplied.
- first lip seal 21 provided on the stern side of the first annular chamber 31 is arranged so that the lip portion 21a faces the outside of the ship, and the seawater pressure P W is one of the tightening pressures on the lip portion 21a. It acts as a part.
- the intermediate lip seal 22 provided on the bow side of the first annular chamber 31 and on the stern side of the second annular chamber 32 is arranged so that the lip portion 22a faces the outside of the ship, that is, the first annular chamber 31 side. cage, the air pressure P 1 in the first annular chamber 31 is acting as part of the tightening pressure on the lip portion 22a.
- the second lip seal 23 provided on the bow side of the second annular chamber 32 is arranged so that the lip portion 23a faces the inside of the ship, that is, the stern pipe 100 side, and the oil chamber 33 in the stern pipe 100.
- hydraulic P O is acting as part of the tightening pressure on the lip portion 23a of the.
- the air control unit 120 supplies compressed air, which is supplied from a compressor (not shown) provided in the ship and whose pressure is adjusted by a pressure reducing valve, a flow rate control valve, or the like (not shown), to the first air supply passages 11 and 11.
- the air control unit 120 receives the air pressure P in the first annular chamber 31 according to the seawater pressure P W that presses the lip portion 21a of the first lip seal 21 arranged on the stern side of the first annular chamber 31.
- the seawater pressure P W fluctuates according to the draft of the ship, and the air control unit 120 adjusts the air pressure in accordance with such fluctuations in the sea water pressure P W. Further, a signal corresponding to the seawater pressure P W , that is, a signal corresponding to the air pressure of the first air supply path 11 and the first annular chamber 31, is provided at the branch portion between the first air supply path 11 and the second air supply path 12. A part of the compressed air is output to the pressure reducing valve 122, which is a part of the air control unit 120, and a part of the compressed air is supplied to the first annular chamber 31 based on the output signal when passing through the pressure reducing valve 122.
- the lubricating oil circulation unit 130 supplies lubricating oil into the stern pipe 100 from the lubricating oil tank 131 provided in the ship through the first lubricating oil circulation path 132 using a pump 134, and circulates the second lubricating oil from the inside of the stern pipe 100. It is a unit that circulates lubricating oil by returning it to the lubricating oil tank 131 again through the passage 133.
- a signal corresponding to the seawater pressure P W is output to the pressure reducing valve 123, which is a part of the air control unit 120 provided at the branch portion between the first air supply path 11 and the third air supply path 13, and is compressed.
- the pressure reducing valve 123 when passing through the pressure reducing valve 123, previously set than the high pressure, and the sea water pressure P W than the air pressure P 2 of the compressed air supplied to the second annular chamber 32 on the basis of the signal output
- the pressure is supplied to the lubricating oil tank 131 through the third air supply passage 13. Therefore, the hydraulic pressure P O of the lubricating oil in the lubricating oil tank 131, a compressed air vacuum By thus contacting the oil surface as a boundary surface, and pressure, than the air pressure P 2 of the second annular chamber 32
- the seawater pressure is adjusted to be lower or the same as the PW .
- the recovery unit 140 collects the lubricating oil from the oil chamber 33 in the stern pipe 100 into the recovery chamber 141 provided in the ship through the communication passage 14 when a problem occurs in which the lubricating oil enters the second annular chamber 32. It is a unit to do. Further, a check valve 142 is provided in the communication passage 14, so that the lubricating oil collected in the recovery chamber 141 is prevented from flowing back into the second annular chamber 32.
- the air pressure P is set to be lower than the air pressure P 1 of the compressed air supplied to the first annular chamber 31 through the first air supply path 11. Since the compressed air decompressed to 2 is supplied to the second annular chamber 32 through the second air supply path 12, the lubricating oil in the oil chamber 33 facing the second lip seal 23 passes through the second lip seal 23. Te be trouble occurs entering the second annular chamber 32, be retained lubricating oil that has entered the first second annular chamber 32 of the annular chamber low air pressure P 2 than within 31 adjacent to Funesotogawa This makes it possible to reliably prevent the lubricating air from leaking out of the ship.
- the lip portion 22a of the intermediate lip seal 22 provided on the stern side of the second annular chamber 32 is arranged so as to face the first annular chamber 31 side, the lip portion 22a of the intermediate lip seal 22 is the first.
- the air pressure P 1 of the annular chamber 31 is a differential pressure is pressed against the inner diameter side towards the outer peripheral surface of the liner 4 by a seal between the air pressure P 2 of the second annular chamber 32, the lubrication that has entered the second annular chamber 32 It is possible to prevent the oil from entering the first annular chamber 31 and further prevent the lubricating oil from leaking out of the ship.
- the lubricating oil in the oil chamber 33 in the stern pipe 100 invades the second annular chamber 32 through the second lip seal 23, the lubricating oil that has invaded the second annular chamber 32 continues through the passage 14.
- the lubricating oil can be easily discharged from the inside of the second annular chamber 32, so that the leakage of the lubricating oil to the outside of the ship can be further prevented.
- the lubricating oil supplied from the lubricating oil circulation unit 130 to the oil chamber 33 in the stern pipe 100 is depressurized so as to be lower than the seawater pressure P W by a preset differential pressure, and the oil chamber 33. Since than hydraulic P O Gaumi pressure P W of the inner is controlled to be low, even if the lubricating oil enters the second annular chamber 32, hardly leaks to the outboard.
- the compressed air supplied from the air control unit 120 to the second annular chamber 32 is depressurized so as to be lower than the lubricating oil supplied to the oil chamber 33 in the stern pipe 100 by a preset differential pressure.
- the lip portion 23a of the second lip seal 23 is pressed toward the inner diameter side toward the outer peripheral surface of the liner 4 by the differential pressure between the second annular chamber 32 and the oil chamber 33 to be sealed, so that the oil chamber 33 is sealed. It is possible to prevent the lubricating oil supplied to the inside from entering the second annular chamber 32. Further, it is possible to prevent the compressed air supplied to the second annular chamber 32 from entering the oil chamber 33.
- the pressure-adjusted compressed air is supplied to the second annular chamber 32 via the air control unit 120, and the compressed air supplied to the first annular chamber 31 and the lubrication supplied into the oil chamber 33 are supplied. Since the differential pressure with the oil can be appropriately maintained, the load on the intermediate lip seal 22 and the second lip seal 23 constituting the second annular chamber 32 can be maintained substantially constant, and the life can be extended.
- the first lip seal 21 Seawater W is prevented from entering the first annular chamber 31 from between the lip portion 21a and the liner 4. Further, by blown overboard from between the lip portion 21a and the liner 4 of the first lip seal 21 against the air pressure P 1 supplied to the first annular chamber 31 to the sea water pressure P W, air Since the control unit 120 can detect fluctuations in seawater pressure PW , it is not necessary to add other detection tanks or pipes.
- the air pressure P 2 in the second annular chamber 32 by setting lower than the sea water pressure P W, it can be a hydraulic P O in the oil chamber 33 and below the sea water pressure P W, the pressure of the lubricating oil It is not necessary to install the pump equipment and the lubricating oil tank 131 at a high place to raise the pressure, and the entire stern pipe sealing system can be simplified.
- the second annular chamber 32 is provided with pressure control valves such as a pressure reducing valve and a relief valve so that excess pressure can be discharged when high-pressure compressed air invades from the first annular chamber 31. This is preferable, and it is possible to prevent air from entering the oil chamber 33.
- the sealing device 201 in the second embodiment will be described. As shown in FIG. 3, the sealing device 201 is provided at a relative rotation point between the housing 210 as the first member and the liner 4 constituting the propeller shaft 2 as the second member that rotates with respect to the housing 210. , A first lip seal 21, an intermediate lip seal 22, a second lip seal 23, and an auxiliary lip seal 24 juxtaposed on the bow side of the second lip seal 23.
- the housing 210 axially includes the first divided housing 10a, the second divided housing 10b, the third divided housing 10c, the fourth divided housing 210d, and the fifth divided housing 210e in order from the stern side. It is formed into a substantially cylindrical shape by being integrally connected by bolts or the like (not shown) in a state of being fitted to each other.
- the outer diameter portion of the auxiliary lip seal 24 is held in a substantially sealed shape between the fourth divided housing 210d and the fifth divided housing 210e. Further, an annular second oil chamber 34 is formed between the second lip seal 23 and the auxiliary lip seal 24.
- a branch connecting passage 234 that branches from the first lubricating oil circulation path 132 extending from the lubricating oil circulation unit 130 and communicates with the second oil chamber 34.
- a through hole forming a part thereof is formed, and the fourth divided housing 210d is formed with a supply port 234a communicating with the branch passage 234 on the lower side of the inner peripheral surface.
- An on-off valve 235 is provided in the branch passage 234.
- the lubricating oil tank 131 constituting the lubricating oil circulation unit 130 is configured as a pressurized tank in which the pressure of the lubricating oil can be adjusted by the pressure of the compressed air supplied from the air control unit 120 through the third air supply passage 13. ing.
- the second lip seal 23 provided on the stern side of the second oil chamber 34 is arranged so that the lip portion 23a faces the inside of the ship, that is, the second oil chamber 34 side, and is inside the second oil chamber 34.
- hydraulic P O2 is acting as part of the tightening pressure on the lip portion 23a of the.
- the auxiliary lip seal 24 provided on the bow side of the second oil chamber 34 is arranged so that the lip portion 24a faces the inside of the ship, that is, the stern pipe 100 side, and the oil chamber 33 in the stern pipe 100 is arranged.
- the oil pressure PO1 acts as part of the tightening pressure on the lip portion 24a.
- the lip portion 23a of the second lip seal 23 is arranged so as to face the second oil chamber 34 side, the lip portion 23a of the second lip seal 23 is arranged. Due to the differential pressure between the second annular chamber 32 and the second oil chamber 34, the liner 4 is pressed toward the inner diameter side toward the outer peripheral surface and sealed, so that the second annular chamber of the lubricating oil supplied to the second oil chamber 34 is sealed. It is possible to prevent the intrusion into the chamber 32. Further, the lubricating oil supplied from the lubricating oil circulation unit 130 to the second oil chamber 34 through the branch communication passage 234 is sealed by the second lip seal 23, so that the hydraulic PO2 in the second oil chamber 34 becomes oil.
- lubricating oil can flow out into the oil chamber 33 from between the lip portion 24a of the auxiliary lip seal 24 and the liner 4.
- the lubricating oil supplied to the second oil chamber 34 is less likely to enter the second annular chamber 32.
- the lubricating oil that has flowed out from the second oil chamber 34 into the oil chamber 33 returns to the lubricating oil tank 131 through the second lubricating oil circulation passage 133.
- the on-off valve 235 in the branch communication passage 234, for example, when the second lip seal 23 is damaged, the on-off valve 235 is closed to stop the supply of the lubricating oil to the second oil chamber 34. , It is possible to switch so as to seal the lubricating oil mainly by the auxiliary lip seal 24.
- the lubricating oil tank constituting the lubricating oil circulation unit is not limited to the one configured as a pressurized tank in which the pressure of the lubricating oil can be adjusted by the pressure of the compressed air supplied from the air control unit 120.
- the lubricating oil tank 231 constituting the lubricating oil circulation unit 230 is lubricated at a constant pressure by gravity. It may be configured as a gravity tank to supply oil.
- the lubricating oil circulation unit 230 shown in FIG. 5 may be applied to the stern pipe sealing system using the sealing device 1 in the first embodiment.
- the sealing device according to the third embodiment will be described with reference to FIG.
- the same components as those shown in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted.
- a seal device for a center-open type tidal current generator will be described as an example.
- the left side of the paper surface of FIG. 6 will be described as the inner diameter side of the sealing device, and the right side of the paper surface of FIG. 6 will be described as the outer diameter side of the sealing device.
- the center-open type tidal current generator sealing device 301 includes an annular rotor 302 having a plurality of blades 303 on the inner peripheral surface and a coil 306 arranged on the outer diameter side of the rotor 302.
- the lubricating oil supplied to the machine for lubrication of the pair of bearings 304 and 304 provided between the ring-shaped power generation unit 307 and the power generation unit 307 is prevented from leaking to the outside of the machine, and seawater W is prevented from entering the machine. Used to prevent.
- the rotor 302 is provided with a magnet 305 in the circumferential direction of the outer peripheral surface, and power is generated by the rotor 302 receiving the tidal current from the blade 303 rotating relative to the power generation unit 307.
- the sealing device 301 includes a pair of annular housings 310, 310 and housings 310, 310 as first members attached to a pair of annular casings 300, 300 arranged in front of and behind the rotor 302 and the power generation unit 307 from the inner diameter side.
- the housings 310 and 310 are in a state in which the first divided housing 310a, the second divided housing 310b, the third divided housing 310c, and the fourth divided housing 310d are fitted to each other in order from the inner diameter side. It is formed in a substantially cylindrical shape by being integrally connected by bolts or the like (not shown).
- the housings 310 and 310 are fixed by bolts or the like (not shown) in a state where the flanges formed on the first divided housings 310a and 310a on the inner diameter side are fitted to the inner peripheral surfaces of the casings 300 and 300, respectively. ing.
- first lip seal 321 is held substantially sealed between the first divided housing 310a and the second divided housing 310b, respectively, and the second divided housing 310b and the third divided housing 310b are held.
- One end of the intermediate lip seal 322 is held substantially sealed between the split housing 310c, and one end of the second lip seal 323 is held between the third split housing 310c and the fourth split housing 310d. It is held in a substantially sealed shape.
- a first annular chamber 331 is formed between the first lip seal 321 and the intermediate lip seal 322, and a second annular chamber 332 is formed between the intermediate lip seal 322 and the second lip seal 323.
- an annular oil chamber 333 is formed between the second lip seal 323 and the bearing 304.
- the second divided housings 310b and 310b a part of the first air supply passages 311, 311 communicating between the air control unit 120 provided in the machine and the first annular chambers 331 and 331 as gas chambers is provided. A through hole is formed.
- the third divided housings 310c and 310c have through holes forming a part of the second air supply passages 312 and 312 communicating between the air control unit 120 and the second annular chambers 332 and 332 as intermediate chambers. It is formed.
- the sealing device 301 of this embodiment so that a lower pressure than the air pressure P 1 of the compressed air through the first air supply passage 311 and 311 is supplied to the first annular chamber 331, air control unit 120 compressed air reduced in pressure to a pneumatic P 2 by the, because through the second air supply passage 312, 312 is supplied to the second annular chamber 332, 332, flight of the oil chamber facing the second lip seal 323 and 323 333 Even if there is a problem that the lubricating oil inside enters the second annular chambers 332 and 332 through the second lip seals 323 and 323, the air pressure P is lower than that inside the first annular chambers 331 and 331 adjacent to the outside of the machine.
- the lubricating oil that has entered the second annular chamber 332 and 332 of No. 2 can be retained, and the leakage of the lubricating air to the outside of the ship can be reliably prevented.
- the sealing device in the above embodiment can recover not only the lubricating oil but also the seawater W that has entered from outside the machine in the second annular chamber as the intermediate chamber.
- the external fluid is not limited to seawater, and may be, for example, fresh water.
- the fluid to be sealed is not limited to the lubricating oil.
- the air control unit 120 has been described as having a configuration in which the compressed air is depressurized by the pressure reducing valves 122 and 123, but the present invention is not limited to this, and various pressure control valves such as a relief valve are used to reduce the pressure of the compressed air. May be used. Further, the compressed gas is not limited to compressed air.
- each sealing means is not limited to that composed of a lip seal.
- the sealing device 301 applied to the center-open type tidal current generator has been described.
- the sealing device having the configuration of the first or second embodiment is used for the turbine type tidal current generator. May be applied.
- Sealing device 2 Propeller shaft (second member) 4 Liner 10 Housing (1st member) 11 1st air supply path 12 2nd air supply path 13 3rd air supply path 14 consecutive passage 21 1st lip seal (1st sealing means) 22 Intermediate lip seal (intermediate seal means) 23 Second lip seal (second seal means) 24 Auxiliary lip seal 31 First ring chamber (gas chamber) 32 Second ring room (intermediate room) 33 Oil chamber 34 Second oil chamber 100 Stern pipe 120 Air control unit 122, 123 Pressure reducing valve 130 Lubricating oil circulation unit 131 Lubricating oil tank 132 First lubricating oil circulation passage 133 Second lubricating oil circulation passage 134 Pump 140 Recovery unit 141 Recovery Chamber 142 Check valve 201 Sealing device 210 Housing (first member) 230 Lubricating oil circulation unit 231 Lubricating oil tank 234 Branching passage 300 Casing 301 Sealing device 302 Rotor (second member) 307 Power generation unit 310 housing (first member) 311 1st air supply path 312 2nd air supply path 321 1s
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Description
第1部材と該第1部材に対して回転する第2部材との相対回転箇所に設けられ、
外部流体に面する第1シール手段と、該第1シール手段に並設され、機内の被密封流体に面する第2シール手段と、を備え、
外部流体の侵入および被密封流体の漏出を防止するシール装置であって、
前記第1シール手段と前記第2シール手段との間には、これら前記第1シール手段および前記第2シール手段に中間シール手段が並設され、
前記第1シール手段と前記中間シール手段との間には、外部流体よりも高圧の気体が供給される気体室が形成され、
前記中間シール手段と前記第2シール手段との間には、前記気体室に供給される気体よりも低圧かつ被密封流体よりも低圧の気体が供給される中間室が形成されている。
これによれば、第2シール手段に面した被密封流体が、この第2シール手段を介して中間室に侵入する不具合が生じても、機外側に隣接する気体室よりも圧力の低い中間室にこの被密封流体を滞留させることができるため、被密封流体の機外への漏出を確実に防止することができる。
これによれば、中間室の気体よりも高圧の被密封流体の圧力を、リップシールの締付圧力として作用させることができるため、被密封流体が中間室に侵入し難い。
これによれば、中間室に侵入した被密封流体が連通路を通して回収室に回収されることにより、中間室内の被密封流体を別室である回収室に排出し易くなるため、被密封流体の機外への漏出をより防止することができる。
これによれば、回収室に回収された被密封流体が連通路を通して中間室に逆流することを防止することができる。
これによれば、気体室に供給される気体や被密封流体との差圧を適正に維持することができる。
これによれば、取扱いが容易で且つ安全性を確保できる。
これによれば、中間室に侵入した被密封流体が機外へ漏出し難い。
詳しくは、空気制御ユニット120は、第1環状室31の船尾側に配置される第1リップシール21のリップ部21aを押圧する海水圧PWに応じて、第1環状室31内の空気圧P1を常に海水圧PWを超えるように調整する。
尚、海水圧PWは、船舶の喫水に応じて変動するものであり、空気制御ユニット120は、このような海水圧PWの変動に追従して空気圧を調整する。また、海水圧PWに応じた信号、すなわち第1空気供給路11および第1環状室31の空気圧に応じた信号は第1空気供給路11と第2空気供給路12との分岐部分に設けられる空気制御ユニット120の一部である減圧弁122に出力されており、圧縮空気の一部は、減圧弁122を通過する際に、当該出力された信号に基づいて第1環状室31に供給される圧縮空気の空気圧P1よりも低圧、かつ船尾管100内の油室33に供給される潤滑油の油圧POよりも予め設定されている差圧分低くなるように減圧された空気圧P2の圧縮空気として、第2空気供給路12を通して第2環状室32に供給される。
2 プロペラ軸(第2部材)
4 ライナー
10 ハウジング(第1部材)
11 第1空気供給路
12 第2空気供給路
13 第3空気供給路
14 連通路
21 第1リップシール(第1シール手段)
22 中間リップシール(中間シール手段)
23 第2リップシール(第2シール手段)
24 補助リップシール
31 第1環状室(気体室)
32 第2環状室(中間室)
33 油室
34 第2油室
100 船尾管
120 空気制御ユニット
122,123 減圧弁
130 潤滑油循環ユニット
131 潤滑油タンク
132 第1潤滑油循環路
133 第2潤滑油循環路
134 ポンプ
140 回収ユニット
141 回収室
142 逆止弁
201 シール装置
210 ハウジング(第1部材)
230 潤滑油循環ユニット
231 潤滑油タンク
234 分岐連通路
300 ケーシング
301 シール装置
302 ロータ(第2部材)
307 発電ユニット
310 ハウジング(第1部材)
311 第1空気供給路
312 第2空気供給路
321 第1リップシール(第1シール手段)
322 中間リップシール(中間シール手段)
323 第2リップシール(第2シール手段)
331 第1環状室(気体室)
332 第2環状室(中間室)
333 油室
Claims (7)
- 第1部材と該第1部材に対して回転する第2部材との相対回転箇所に設けられ、
外部流体に面する第1シール手段と、該第1シール手段に並設され、機内の被密封流体に面する第2シール手段と、を備え、
外部流体の侵入および被密封流体の漏出を防止するシール装置であって、
前記第1シール手段と前記第2シール手段との間には、これら前記第1シール手段および前記第2シール手段に中間シール手段が並設され、
前記第1シール手段と前記中間シール手段との間には、外部流体よりも高圧の気体が供給される気体室が形成され、
前記中間シール手段と前記第2シール手段との間には、前記気体室に供給される気体よりも低圧かつ被密封流体よりも低圧の気体が供給される中間室が形成されているシール装置。 - 前記第2シール手段は、リップシールであり、そのリップ部が被密封流体により前記第2部材に押し付けられるように配置されている請求項1に記載のシール装置。
- 前記中間室は、連通路を介して回収室に連通されている請求項1または2に記載のシール装置。
- 前記連通路には、前記中間室側への逆流を防止する逆止弁が設けられている請求項3に記載のシール装置。
- 前記中間室には、圧力制御された圧縮気体が供給されている請求項1ないし4のいずれかに記載のシール装置。
- 前記圧縮気体は、圧縮空気である請求項5に記載のシール装置。
- 被密封流体は、外部流体よりも低圧に制御されている請求項1ないし6のいずれかに記載のシール装置。
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JP2021520713A JPWO2020235380A1 (ja) | 2019-05-17 | 2020-05-11 | |
US17/610,370 US11821519B2 (en) | 2019-05-17 | 2020-05-11 | Seal device |
CN202080035477.7A CN113825921B (zh) | 2019-05-17 | 2020-05-11 | 密封装置 |
KR1020217037548A KR102664812B1 (ko) | 2019-05-17 | 2020-05-11 | 시일 장치 |
EP20810157.6A EP3971432A4 (en) | 2019-05-17 | 2020-05-11 | SEALING DEVICE |
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EP (1) | EP3971432A4 (ja) |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57179471A (en) * | 1981-04-13 | 1982-11-05 | Howaldtswerke Deutsche Werft | Shaft sealing system for stern tube seal shaft sealing device |
JPS5832099U (ja) * | 1981-08-28 | 1983-03-02 | 日本ド−バ−株式会社 | 船尾管シ−ル |
JPH01148171U (ja) * | 1988-03-31 | 1989-10-13 | ||
JPH07242197A (ja) * | 1994-03-04 | 1995-09-19 | Nippon Marine Techno Kk | 船尾管シール装置 |
JPH11304005A (ja) | 1998-04-22 | 1999-11-05 | Cobelco Marine Engineering:Kk | 船舶用推進軸の軸封装置 |
JP2000238694A (ja) * | 1999-02-23 | 2000-09-05 | Nippon Marine Techno Kk | 船尾管シール装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL191701C (nl) | 1981-04-13 | 1996-04-02 | Blohm Voss Ag | Afdichtstelsel voor een lekveilige afdichting van een schroefaskoker. |
JPS5832099A (ja) | 1981-08-21 | 1983-02-24 | Hitachi Metals Ltd | 単結晶の製造方法 |
JPS59145499U (ja) * | 1983-03-18 | 1984-09-28 | イ−グル工業株式会社 | 船尾管軸封装置 |
JPH01148171A (ja) | 1987-12-07 | 1989-06-09 | Sekine:Kk | おろしわさびの製造法 |
JPH0972427A (ja) * | 1995-09-04 | 1997-03-18 | Nippon Marine Techno Kk | 船尾管シール装置 |
JP2005041348A (ja) * | 2003-07-22 | 2005-02-17 | Kobelco Eagle Marine Engineering Co Ltd | 船舶用推進軸の軸封装置及び軸封方法 |
JP4755428B2 (ja) * | 2005-02-25 | 2011-08-24 | バルチラジャパン株式会社 | 船舶用推進軸の軸封装置 |
AT503578B1 (de) | 2006-04-28 | 2007-11-15 | Andritz Ag Maschf | Dichtanordnung |
JP2010196838A (ja) * | 2009-02-26 | 2010-09-09 | Toyota Motor Corp | 摩擦係合装置 |
JP4673452B1 (ja) * | 2010-06-10 | 2011-04-20 | バルチラジャパン株式会社 | シールリングおよび船尾管シール装置 |
DE102014217223B4 (de) * | 2014-08-28 | 2016-09-15 | Skf Blohm + Voss Industries Gmbh | Abdichtungssystem, Verfahren und Wasserfahrzeug |
JP6105803B1 (ja) * | 2016-01-15 | 2017-03-29 | バルチラジャパン株式会社 | 船尾管シールシステム、船尾管シール装置、及び船舶 |
FR3068757B1 (fr) * | 2017-07-05 | 2020-06-26 | Ge Energy Power Conversion Technology Limited | Dispositif d'etancheite pour arbre de propulsion d'une unite de propulsion de vehicule marin |
-
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- 2020-05-11 CN CN202080035477.7A patent/CN113825921B/zh active Active
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57179471A (en) * | 1981-04-13 | 1982-11-05 | Howaldtswerke Deutsche Werft | Shaft sealing system for stern tube seal shaft sealing device |
JPS5832099U (ja) * | 1981-08-28 | 1983-03-02 | 日本ド−バ−株式会社 | 船尾管シ−ル |
JPH01148171U (ja) * | 1988-03-31 | 1989-10-13 | ||
JPH07242197A (ja) * | 1994-03-04 | 1995-09-19 | Nippon Marine Techno Kk | 船尾管シール装置 |
JPH11304005A (ja) | 1998-04-22 | 1999-11-05 | Cobelco Marine Engineering:Kk | 船舶用推進軸の軸封装置 |
JP2000238694A (ja) * | 1999-02-23 | 2000-09-05 | Nippon Marine Techno Kk | 船尾管シール装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3971432A4 |
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EP3971432A1 (en) | 2022-03-23 |
EP3971432A4 (en) | 2023-01-18 |
CN113825921A (zh) | 2021-12-21 |
KR20210150570A (ko) | 2021-12-10 |
JPWO2020235380A1 (ja) | 2020-11-26 |
US11821519B2 (en) | 2023-11-21 |
KR102664812B1 (ko) | 2024-05-17 |
US20220221059A1 (en) | 2022-07-14 |
CN113825921B (zh) | 2023-12-12 |
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