JP3229120B2 - Lubricating device for sealing device of contra-rotating propeller shaft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for a sealing device for a contra-rotating propeller shaft. Rear sealing device).

[0002]

2. Description of the Related Art Conventionally, a lubricating device as shown in FIG. 3 has been proposed as a lubricating device for a stern tube shaft sealing device of a single-shaft ship. That is, in FIG. 3, reference numerals 114 and 115 indicate stern tube bearings mounted on a hull 116 for supporting a propeller shaft 113. Since lubricating oil is used for the stern tube bearings 114 and 115, stern tube shaft sealing devices are provided at two locations on the bow and stern sides of the stern tube bearings 114 and 115 in order to prevent the lubricating oil 117 from flowing out. Can be Reference numeral 114a denotes a stern tube bearing 114 (11
5) shows the lubricating oil chamber.

[0003] The stern tube shaft sealing device includes casings 100 and 109 of a shaft sealing device provided at the front end and the rear end of the stern tube of the hull 116 so as to surround the outer periphery of the propeller shaft 113. It is composed of rubber lip seals 101 to 104 and 110 to 111 which are attached to the circumference and whose inner ends slide in contact with the outer peripheral surfaces of the liners 105 and 112 on the propeller shaft 113. Is lubricated with oil for lubricating the sliding portion.

[0004] Many ships are equipped with an emergency pipe 106 in order to ensure the durability of the lip-type seal of the stern-side shaft sealing device, where replacement of the lip-type seal is relatively difficult. Also, a valve 107 is provided on an oil drain pipe 108 for draining lubricating oil that has lubricated the stern tube bearings 114 and 115. When the valve 107 is normally opened, the lip type seal 1 is opened.
Hydraulic pressure between 03 and 104 is stern tube bearing 11 by piping 106
The lubricating oil chambers 114a and 114a are the same as the lubricating oil chamber 114a, and as a result, the lip-type seal 104 is free and the lip-type seal 103 functions.

In the event of an abnormality such as wear of the lip seal 103, the valve 107 is closed so that the lip seal 103 is closed.
The pressure between the lip seal 104 and the lip seal 104 begins to function.

Next, assuming a case where such a lubricating device for a stern tube shaft sealing device is applied to an inner shaft rear sealing device of a contra-rotating propeller shaft ship, it is as shown in FIGS. It will be. In FIG. 4, reference numeral 1 denotes an inner propeller shaft, and reference numeral 2 denotes an outer propeller shaft.

The outer propeller shaft 2 is rotatably supported by the hull 21 via outer shaft bearings 3 and 4, and the inner propeller shaft 1 is rotatably supported by the inner shaft rear bearing 13. . The inner shaft rear bearing 13 is attached to the inner surface of the front propeller 5 attached to the rear end of the outer propeller shaft 2. A rear propeller (not shown) is attached to a rear end of the inner propeller shaft 1.

Reference numeral 7 denotes an inner shaft rear sealing device. The inner shaft rear sealing device 7 includes a casing 7a provided on the rear end surface of the front propeller 5 so as to surround the outer periphery of the inner shaft propeller shaft 1. Rubber lip seals 9 to 9 which are attached to the inner periphery of the casing 7 a and whose inner end is in sliding contact with the outer peripheral surface of the liner 8 on the inner propeller shaft 1.
The lubricating oil for lubricating the sliding portion is sealed between the lip-type seals.

Reference numeral 19 denotes an outer shaft front sealing device. The outer shaft front sealing device 19 also has a casing 19a attached to the hull 21 and provided so as to surround the outer shaft propeller shaft 2. A rubber lip-type seal that is attached to the inner peripheral surface of the casing 19a and whose inner end is in sliding contact with the outer peripheral surface of the liner 16 on the outer propeller shaft 2.
The lubricating oil for lubricating the sliding portion is sealed between the lip-type seals.

Further, an emergency pipe 14 for supplying oil between the lip type seals 11 and 12 of the inner shaft rear sealing device 7 is laid on the inner surface of the outer shaft propeller shaft 2, and the emergency pipe 14 is provided with an outer shaft. An outlet pipe 25 communicates with the outer shaft bearing 3 via a valve 15 through a front seal device 19.
(4) It is connected to an oil drain pipe 22 opening to the lubricating oil chamber 3a. Reference numeral 6 in FIG. 4 indicates an outer shaft rear sealing device, and the outer shaft rear sealing device 6 is an outer shaft front sealing device 19.
It has the same configuration as. Reference numeral 27 indicates lubricating oil.

The apparatus shown in FIG. 5 is different from the apparatus shown in FIG. 4 in that a dedicated oil supply device 41 for the inner shaft rear seal device 7 is provided on the surface of the outer shaft propeller shaft 2 on the bow side of the outer shaft front seal device 19. It is the one that was attached. The oil supply device 41 also includes a casing 41a, lip-type seals 42, 43, and a liner 40, and has substantially the same configuration as the outer shaft front seal device 19 in FIG. Reference numeral 44 indicates a hull-side support member of the casing 41a.

As described above, the emergency pipe 14 is laid on the inner surface of the outer propeller shaft 2 to supply oil between the lip type seals 11 and 12 of the inner shaft rear seal device 7. As a connection structure between the emergency pipe 14 and the outlet pipe 25 of the valve 15, in the case of FIG. 4, the space between the lip-type seals 17 and 18 of the outer shaft front seal device 19 is used, and in the case of FIG. Refueling equipment 41
Is provided.

Normally, the valve 15 is "open", and the oil chamber between the lip-type seals 11 and 12 is used for emergency piping.
Due to 14 and the outlet pipe 25, it becomes the same as the vicinity of the outer shaft bearings 3 and 4, and as a result, the lip-type seal 12 is in a free state and the lip-type seal 11 functions. In the event of an abnormality such as the lip seal 11 being worn, the pressure between the lip seals 11 and 12 is reduced by closing the valve 15, and the lip seal 12 starts functioning.

[0014]

By the way, what is shown in FIGS. 4 and 5 has the following problems. (1) Since the shaft chamber near the outer shaft front seal 19 is very narrow, it is difficult to mount the valve 15 and the outlet pipe 25 provided on the oil drain pipe 22 and, in the case of FIG. Additional work is required. (2) Emergency piping 14 laid on the inner surface of the outer shaft propeller shaft 2
In order to connect with the outer shaft front seal device 19, it is necessary to add a lip-type seal 24 or to provide a dedicated lubrication device 41. Required, and the shaft system becomes longer. As a result, it becomes necessary to move the main engine forward, which makes it difficult to dispose the engine room, and increases the cost of an additional refueling device in addition to the extension of the shaft system device.

An object of the present invention is to provide a lubricating device for a contra-rotating propeller shaft sealing device which solves these problems.

[0016]

In order to achieve the above object, a lubricating apparatus for a contra-rotating propeller shaft sealing device according to claim 1 is mounted on a hull of the propeller boat in a contra-rotating propeller boat. An outer propeller shaft rotatably supported by the outer shaft bearing and having a front propeller mounted at a rear end thereof, and an inner shaft mounted inside the outer shaft propeller shaft and mounted on the outer shaft propeller shaft. An inner propeller shaft rotatably supported by a shaft bearing and having a rear propeller mounted at a rear end; and the hull and the outer propeller in front of the front propeller to prevent leakage of lubricating oil from the outer shaft bearing. Between the outer propeller shaft and the inner propeller shaft behind the front propeller so as to prevent leakage of lubricating oil from the inner shaft bearing; Rear part of the inner shaft A casing provided on the front propeller so as to surround the outer periphery of the inner propeller shaft, and an inner diameter end portion attached to the inner peripheral surface of the casing. A plurality of lip-type seals that can slide on the outer peripheral surface of the liner on the inner-shaft propeller shaft, and lubricating oil is sealed between the lip-type seals. A casing provided on the hull so as to surround the outer periphery of the outer propeller shaft; and a plurality of casings attached to the inner periphery of the casing and having an inner diameter end slidably contacting an outer peripheral surface of a liner on the outer propeller shaft. Lip seals, lubricating oil is sealed between the lip seals, an emergency pipe is laid on the inner surface of the outer propeller shaft, and the rear end of the emergency pipe is Shaft rear The front end is connected to a lubrication hole that penetrates the liner of the outer shaft front end seal device in the front-rear direction through a valve and communicates with the lubricating oil chamber of the outer shaft bearing. It is characterized by having.

Further, the lubricating device in the contra-rotating propeller shaft sealing device according to claim 2 is the lubricating device in the contra-rotating propeller shaft sealing device according to claim 1, wherein the valve comprises the outer shaft. It is characterized in that it is mounted on the surface of the propeller shaft.

[0018]

In the lubricating device for the contra-rotating propeller shaft sealing device of the present invention described above, the valve provided on the surface of the outer shaft propeller shaft is normally opened when the lip of the inner shaft rear sealing device is opened. The pressure between the mold seals becomes the same as that near the outer shaft bearing, the inner lip seal functions, and the outer lip seal is free. In the event of any abnormality, by closing the valve, the pressure between the lip-type seals is reduced, and the lip-type seal that has been in a free state functions.

The emergency piping is connected to the lubricating oil chamber of the outer shaft bearing through an oil supply hole which penetrates the liner of the outer shaft front seal device in the front-rear direction. The number of valves can be reduced, and in addition to mounting the valve on the outer propeller shaft, simplification in the vicinity of the outer shaft front seal device can be achieved.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a lubricating device of a contra-rotating propeller shaft sealing device according to an embodiment of the present invention. FIG. 2 (a) and FIG. It is a sectional side view which shows the modification of. It should be noted that FIG.
The same reference numerals as 5 denote substantially the same members.

In this embodiment, the outer propeller shaft 2 is rotatably supported by outer shaft bearings 3 and 4 mounted on the hull 21.
A front propeller 5 is attached to the rear end of the outer shaft 2. Further, an inner shaft rear bearing 13 is attached to the inner surface of the front propeller 5, and the inner shaft propeller shaft 1 is rotatably supported by the inner shaft rear bearing 13 and is disposed concentrically with the outer shaft propeller shaft 2. . A rear propeller (not shown) is attached to a rear end (left end in FIG. 1) of the inner propeller shaft 1.

Further, an inner shaft rear sealing device 7 is attached to the rear end face of the front propeller 5 as in the case of FIGS. Reference numerals 9 to 12 denote rubber lip-type seals whose upper ends are attached to the inner peripheral surface of the casing 7a of the inner shaft rear sealing device 7, and their inner diameter ends are attached to the inner shaft propeller shaft 1. The outer peripheral surface of the liner 8 is slidably contacted. The inner shaft rear sealing device 7 has the same configuration as the inner shaft rear sealing device 7 in FIGS.

Reference numeral 6 denotes an outer shaft rear seal device, and reference numeral 19 denotes an outer shaft front seal device. These are all the outer shaft rear seal device 6 and the outer shaft front seal device in FIGS. An emergency pipe 14 is laid on the inner surface of the outer propeller shaft 2 having the same configuration as the outer seal device 19,
The rear end of the emergency pipe 14 is connected between the lip-type seals 11 and 12 of the inner shaft rear seal device 7, and the front end is connected via a valve 15 to the liner 16 of the outer shaft front seal device (this liner
16 is attached to the outer propeller shaft 2), and is connected to a front end of a lubrication hole 20 penetrating in the front-rear direction.

The rear end of the oil supply hole 20 opens to the lubricating oil chamber 3a of the outer shaft bearing 3 (4), and an oil drain pipe 22 is connected to the lubricating oil chamber 3a. Although a normal stop valve may be used as the valve 15,
As shown in FIGS. 2 (a) and 2 (b), a bolt 31 is screwed into a sleeve 30 mounted on the outer propeller shaft 2, and by rotating the bolt 31, the bolt 31 is tightened or pulled up. FIG.
It is preferable that the structure is such that switching between the "open" state of FIG. 2A and the "closed" state of FIG. 2B is performed.

In the above configuration, when the valve 15 is normally opened, the pressure between the lip-type seals 11 and 12 of the inner shaft rear sealing device 7 is changed to the lubricating oil of the outer shaft bearings 3 and 4. It becomes the same as the chamber 3a, the lip seal 11 functions, and the lip seal 12 is in a free state. In case of any abnormality, the lip seals 11 and 12 can be closed by closing the valve 15.
And the pressure between them decreases, and the lip-type seal 12, which has been in the free state, functions.

In this embodiment, the oil drain pipe is not provided with the valve 15 as in the apparatus shown in FIGS. 4 and 5, and the outlet pipe 25 in the apparatus shown in FIGS. The inconvenience of mounting the valve 15 on the oil drain pipe 22 and attaching the outlet pipe 25 in the devices 4 and 5 can be eliminated.

Further, the number of lip-type seals to be installed in the outer shaft front seal device 19 can be reduced, and the exclusive oil supply device 41 as shown in FIG. 5 is not required.
There are advantages that the production cost and the installation cost of the lubrication device are not required, and that the increase in the shaft length due to the installation of the lubrication device can be suppressed. Valve 15 is connected to outer propeller shaft 2
, The vicinity of the outer shaft front sealing device 19 can be simplified.

[0028]

As described in detail above, according to the lubricating device for the contra-rotating propeller shaft sealing device of the present invention, the following effects and advantages can be obtained. (1) Because the oil drain pipe is not equipped with a valve, the addition of a lip-type seal for the outer shaft front seal device is unnecessary, and the installation of a dedicated lubrication device is not required, the layout for the inner shaft rear seal device is easy. Emergency piping can be laid. (2) It is possible to suppress the cost of the dedicated lubricating device main body, its mounting cost, and the cost increase due to the increase of the shaft length, which is advantageous in terms of cost. (3) By mounting the valve on the outer shaft propeller shaft, the vicinity of the outer shaft front sealing device can be simplified.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a lubricating device in a sealing device for a contra-rotating propeller shaft as one embodiment of the present invention.

FIG. 2 (a) is a sectional side view showing an “open” state of a modified example of the valve. (b) Side sectional view showing the “closed” state.

FIG. 3 is a sectional side view of a lubricating device in a conventional sealing device for a single-axis ship.

FIG. 4 is a side sectional view of a lubricating device in a sealing device when the conventional technique is applied to a contra-rotating propeller shaft ship.

FIG. 5 is a side sectional view when the exclusive lubrication device is provided.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner shaft propeller shaft 2 Outer shaft propeller shaft 3,4 Outer shaft bearing 3a Lubricating oil chamber 5 Front propeller 6 Outer shaft rear sealing device 7 Inner shaft rear sealing device 8,16 Liner 9,10,11,12,17,18 Lip type seal 13 Inner shaft bearing 14 Emergency piping 15 Valve 19 Outer shaft front sealing device 20 Oil supply hole 21 Hull 22 Drain pipe 27 Lubricating oil

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiro Tanaka 1-1, Akunouramachi, Nagasaki-shi Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Masami Akazu 1500 Katayanagi, Oaza, Sakado-shi, Saitama Eagle Industry Co., Ltd. (72) Inventor Kiyoshi Uchiyama 1500 Katayanagi, Oaza, Sakado-shi, Saitama Prefecture (56) References Japanese Utility Model 4-5595 (JP, U) Japanese Utility Model 3-72099 (JP, U) 58) Field surveyed (Int.Cl. ⁷ , DB name) B63H 5/10 B63H 23/36

Claims (2)

(57) [Claims] 1. A contra-rotating propeller ship, comprising: an outer propeller shaft rotatably supported by an outer shaft bearing mounted on a hull of the propeller ship and having a front propeller mounted at a rear end; An inner propeller shaft disposed inside the shaft and rotatably supported by an inner shaft bearing mounted on the outer shaft propeller shaft and having a rear propeller mounted on a rear end thereof; and a lubricating oil for the outer shaft bearing. An outer shaft front seal device interposed between the hull and the outer shaft propeller shaft in front of the front propeller to prevent leakage of the front propeller, and the outer shaft front seal device for preventing leakage of lubricating oil of the inner shaft bearing. An inner shaft rear seal device interposed between the outer shaft propeller shaft and the inner shaft propeller shaft behind the front propeller, the inner shaft rear seal device surrounding the outer periphery of the inner shaft propeller shaft. To the front propeller And a plurality of lip-type seals attached to the inner peripheral surface of the casing and having inner diameter ends slidably in contact with the outer peripheral surface of the liner on the inner propeller shaft. Lubricating oil is sealed between the seals, and the outer shaft front sealing device is provided on the hull so as to surround the outer periphery of the outer shaft propeller shaft; and
A plurality of lip-type seals which are attached to the inner periphery of the casing and whose inner end is slidable on the outer peripheral surface of the liner on the outer-shaft propeller shaft are formed. Emergency piping is laid on the inner surface of the outer shaft propeller shaft, the rear end of the emergency piping is connected between the lip-type seals of the inner shaft rear sealing device, and the front end is connected via a valve. Lubricating in a seal device for a contra-rotating propeller shaft, characterized in that it is connected to a lubrication hole which penetrates the liner of the outer shaft front sealing device in the front-rear direction and communicates with a lubricating oil chamber of the outer shaft bearing. apparatus. 2. The contra-rotating propeller according to claim 1, wherein the valve is mounted on the surface of the outer propeller shaft. Lubrication device for shaft seal device.