KR102383551B1 - Stern Tube Sealing Device Having Antistatic Structure - Google Patents

Abstract

Disclosed is a stern tube sealing device including an antistatic structure. In accordance with an embodiment of the present invention, the stern tube sealing device, which is mounted at one end of a stern tube attached to the circumference of a shaft of a vessel to form a shaft rotation space therein, includes: a sealing body part formed in a structure inserted by a predetermined depth from one end of the stern tube to be mounted, and extended from the one end of the stern tube by a predetermined length to surround the circumference of the shaft; a static electricity absorption member mounted at one end of the sealing body part, mounted in contact with a part of the outer circumference surface of the shaft, and made of a carbon material; an absorption member mounting part mounted at one end of the sealing body part, fixing a position of the static electricity absorption member in a structure surrounding a part of the outer surface of the static electricity absorption member, and having an elastic member embedded therein to press the static electricity absorption member in a direction vertical to the outer circumference surface of the shaft; and a static electricity ground line mounted on one side of the absorption member mounting part, and removing the static electricity absorbed by the static electricity absorption member to the outside. In accordance with the present invention, since the stern tube sealing device is mounted at the one end of the stern tube in which the propeller shaft of the vessel is mounted to prevent the generation of static electricity in the stern tube, the stern tube sealing device can fundamentally prevent damage to the propeller shaft caused by the static electricity.

Description

Stern Tube Sealing Device Having Antistatic Structure

The present invention relates to a stern tube sealing device, and more particularly, to a stern tube sealing device including a structure capable of preventing static electricity from being generated inside the stern tube on which a propeller shaft of a ship is mounted.

In general, a ship acquires propulsion by transmitting power generated from an engine mounted on the inside of the ship to a screw installed on the outside of the ship. Since one end of the shaft is connected to the engine located inside the ship, and the other end is connected to the screw located outside the ship, the shaft penetrates the hull from the inside of the ship and protrudes to the outside.

Therefore, seawater may flow into the gap formed between the shaft and the stern tube, causing an accident in which the vessel is submerged or seawater contamination.

1 is a cross-sectional view of a conventional oil spillage and seawater inflow prevention device mounted on a ship.

Inside the ship, rotational power is generated from the engine 10 of the engine room, the rotational force is reduced to a required reduction ratio by the reducer 12, and then, through the shaft 16 connected to the coupling 14, the It is transmitted to the screw (22).

At this time, the stern tube 18 is inserted when the hull is manufactured so that the shaft 16 penetrates the ship and protrudes to the outside. And the shaft 16 transmits the power of the engine 10 to the screw 22 while passing through the stern tube 18 . The stern tube 18 protrudes to the outside of the ship through the stern end in the engine room of the ship, and serves to support and protect the shaft 16 and to prevent the nets and various fishing tools from being wound around the shaft 16 .

In order to prevent vibration caused by the rotation of the shaft 16 and to prevent the inflow of seawater or the outflow of oil, a lignam byte 20 made of a strong wood material is inserted into both ends of the stern tube 18 . Then, oil is injected to reduce friction between the lignam byte 20 and the shaft 16 .

However, the shaft 16 vibrates due to engine vibration or water resistance and screw vibration, and if such vibration continues, the shaft 16 may be bent or damaged. And the conventional method of preventing the vibration of the shaft 16 by using the lignam byte 20 made of wood has a limitation. Since the lignam byte 20 is made of wood, it is easily worn due to friction with the shaft 16 formed of stainless steel or the like, and seawater is introduced without performing its original function.

And, in the prior art, in order to replace the worn lignam byte 20, the screw 22 and the shaft 16 are separated from the reducer 12 and the coupling 14, and then the lignam byte 20 is processed and disassembled. Therefore, there was a problem in that the work process was complicated because it had to be replaced and reassembled.

In addition, in the case of the structure according to the prior art, there is a problem in that static electricity is generated by the rotational driving of the shaft 16 to damage the outer peripheral surface of the shaft 16 . In order to solve this problem, a device for grounding static electricity by mounting a separately manufactured carbon member adjacent to the shaft 16 has been developed.

However, in the case of the electrostatic grounding device according to the prior art, there is a problem in that a separately manufactured and operated device must be installed adjacent to the existing shaft. In addition, there is a problem in that it is necessary to install an electrostatic grounding device of a different specification according to the outer diameter of the existing shaft.

Accordingly, there is a need for a technique capable of solving the above-mentioned problems according to the prior art.

Korean Patent Publication No. 10-0888391 (Registration date: March 05, 2009)

An object of the present invention is to provide a stern tube sealing device that can fundamentally block damage to the propeller shaft due to static electricity by preventing static electricity from being generated inside the stern tube by being mounted on one end of the stern tube on which the propeller shaft of the ship is mounted. will provide

A stern tube sealing device according to an aspect of the present invention for achieving this object is a stern tube sealing device mounted on one end of the stern tube which is in close contact with the periphery of the shaft of a ship to form a shaft rotation space therein, the stern a sealing body part inserted and mounted from one end of the tube by a predetermined depth, extending from one end of the stern tube by a predetermined length to surround the shaft; an electrostatic absorbing member mounted on one end of the sealing body part, in contact with a portion of an outer circumferential surface of the shaft, and made of a carbon material; An absorbing member having a built-in elastic member mounted on one end of the sealing body, fixing the position of the static absorbing member in a structure that surrounds a part of the outer surface of the static absorbing member, and pressing the static absorbing member in a direction perpendicular to the outer circumferential surface of the shaft mounting part; and an electrostatic grounding line mounted on one side of the absorbing member mounting part and dissipating static electricity absorbed from the electrostatic absorbing member to the outside.

In an embodiment of the present invention, the static absorbing member includes: a body part of the absorbing member having a block structure made of a carbon material; an absorbent member traction part having a structure that is mounted to surround a portion of the outer surface of the absorbent member body part and is mounted on a radial rail formed inside the absorbent member mounting part to change its position; a shaft contact portion formed in an area of a predetermined size at one end of the absorption member body portion and having the same curved structure as an outer circumferential surface of the shaft; and a plurality of contact protrusions formed to protrude from the outer surface of the shaft contact portion by a predetermined height and having a structure continuously extending along the outer circumferential surface of the shaft spaced apart from each other by a predetermined interval.

In this case, the absorbing member mounting portion is mounted on both sides of the absorbing member mounting portion, the mounting fixing portion is bound to one end surface of the sealing body in a detachable structure; and a radial rail formed on the inner surface of the absorbing member mounting part and formed in a direction perpendicular to the outer peripheral surface of the shaft.

In addition, the sealing body portion is formed at one end of the sealing body portion, has a structure that is recessed by a predetermined depth in a form to surround the outer circumferential surface of the shaft, and a circumferential rail for mounting the mounting fixing portion so that the position can be changed along the outer circumferential surface of the shaft It may be a configuration including ;.

In one embodiment of the present invention, the stern tube sealing device, has a structure that enters from one end side of the sealing body toward the center of the sealing body, an oil inlet for injecting sealing oil into the oil ring; a water inlet for injecting water within a specific pressure range between the sealing body and the shaft circumference and having a structure that enters from one end side of the sealing body toward the center of the sealing body; an oil ring mounted inside one end of the sealing body part, having a ring structure sealing between the sealing body part and the shaft circumference, and having an oil delivery hole introduced from the oil inlet; And it is mounted inside one end of the sealing body part, is disposed in close contact with one side and the other side of the oil ring, the lidenaring of a ring structure that seals between the sealing body part and the shaft circumference; may be a configuration comprising a.

In one embodiment of the present invention, the stern tube sealing device is formed at one end of the sealing body, has a structure recessed by a predetermined depth from the inner circumferential surface surrounding the shaft circumference, and extends by a predetermined depth from one end of the sealing body a ring mounting groove with a structure of and a ring fixing plate that is bolted to one end of the sealing body, has a plate-like structure having the same shape as that of one end of the sealing body, and has a through hole wrapped around the shaft in the central portion. The oil ring is mounted, and the redena ring and the oil ring can be fixed by the ring fixing plate.

In one embodiment of the present invention, the sealing body part is formed on the inner circumferential surface of the sealing body part surrounding the shaft circumference, is spaced apart by a predetermined angle about the shaft's axis of rotation, and a plurality of them are arranged, and a predetermined depth from the inner circumferential surface of the sealing body part It has a structure formed in a direction parallel to the extension length of the shaft and is recessed, and a pressure providing groove that provides a predetermined amount of pressure to a space formed between the sealing body and the circumference of the shaft; may be configured to include.

In one embodiment of the present invention, the sealing body portion is a structure that is inserted by a predetermined depth inward from one end of the stern tube, has a structure having the same outer diameter as the inner diameter of the stern tube, and the rotation of the structure surrounding the shaft in the center a first insertion portion forming a space; a second insertion part protruding from one end surface of the first insertion part by a predetermined length, having a structure spaced apart from the inner circumferential surface of the stern tube by a predetermined distance, and forming a rotational space of a structure surrounding the shaft at the center; and a cylindrical structure extending laterally by a predetermined length in a structure surrounding one end of the stern tube, and a main body extension part coupled to one end of the stern tube.

In this case, the oil inlet and the water inlet may be formed in the body extension part.

In addition, the first insertion part, a sealing groove formed in a structure recessed by a predetermined depth along the outer circumferential surface of the first insertion part; may include a configuration.

In one embodiment of the present invention, the oil ring has a ring structure having an outer diameter of a predetermined length, a first contact side surface forming one side having a width of a predetermined length; a second contact side surface having a ring structure having an outer diameter equal to that of the first contact side surface and forming the other side surface having a width of a predetermined length; a central connection part in which the first contact side and the second contact side are formed in an integrated structure, the first contact side and the second contact side are spaced apart by a predetermined length, and an oil delivery hole is formed in the central part; a first indentation groove having a structure that is indented by a predetermined depth from the outer circumferential surface of the central connection part; and a second indentation groove having a structure that is depressed by a predetermined depth from the inner circumferential surface of the central connection part.

As described above, according to the stern tube sealing device of the present invention, by providing a sealing body portion, static absorbing member, absorbing member mounting portion and static electricity grounding line of a specific structure, one end of the stern tube on which the propeller shaft of the ship is mounted It is possible to provide a stern tube sealing device that can fundamentally block damage to the propeller shaft due to static electricity by preventing static electricity from being generated inside the stern tube.

In addition, according to the stern tube sealing device of the present invention, by providing the static absorbing member including the absorbing member traction part, the shaft contact part and the contact protrusion of a specific structure, the static electricity generated by the rotation of the propeller shaft of the ship can be effectively absorbed. As a result, it is possible to fundamentally block the damage to the shaft by static electricity, thereby extending the life of the shaft and screw, preventing shaft cutting accidents, and eliminating the need to separately install carbon for safety accident prevention. A stern tube sealing device may be provided.

In addition, according to the stern tube sealing apparatus of the present invention, by forming the first rail and the second rail of a specific structure at a specific position, the quantity and position of the static electricity absorbing member can be arranged in an optimal position according to the intention of the operator, It is possible to change the quantity and position of the absorbing member mounting portion and the static absorbing member according to the outer diameter of the shaft, so that it is possible to provide a sealing device for the stern tube that can be customized according to the specifications of the shaft.

In addition, according to the stern tube sealing device of the present invention, by having a sealing body part, an oil inlet, a water inlet, an oil ring and a redena ring of a specific structure, it is mounted on one end of the stern tube to which the propeller shaft of the ship is mounted and is mounted on the stern It is possible to provide a stern tube sealing device with excellent durability and low repair cost by stably maintaining the sealing state inside the tube and having a structure that is easy to maintain and maintain the stern tube sealing device.

In addition, according to the stern tube sealing device of the present invention, by mounting the oil ring and the redena ring of a specific structure in a double structure, continuous sealing is possible without a packing material, and the shaft abrasion phenomenon and packing exchange operation can be omitted, By composing the material with acetal, it is possible to provide a stern tube sealing device with excellent durability and low repair cost.

In addition, according to the stern tube sealing device of the present invention, by having a ring mounting groove and a ring fixing plate of a specific structure, the bolting state of the ring fixing plate is separated to easily replace the redena ring and the oil ring mounted in the ring mounting groove or It can be managed, and it is possible to provide a sealing device for the stern tube which requires a low repair cost.

In addition, according to the stern tube sealing device of the present invention, by having an oil ring including the first contact side, the second contact side, the central connection part, the first indentation groove and the second indentation groove of a specific structure, continuous without packing material It is possible to seal, it is possible to omit shaft abrasion and packing replacement work, and by composing the material with acetal, it is possible to provide a stern tube sealing device with excellent durability and low repair cost.

1 is a cross-sectional schematic view showing an oil spillage and seawater inflow prevention device mounted on a ship according to the prior art.
Figure 2 is a front view showing the stern tube sealing device according to an embodiment of the present invention.
3 is a plan view showing the stern tube sealing device shown in FIG.
4 is a longitudinal cross-sectional view showing the stern tube sealing device shown in FIG.
FIG. 5 is an enlarged view of part “A” of FIG. 4 .
6 is a plan view showing the static absorbing member and the absorbing member mounting portion of the stern tube sealing device shown in FIG. 3 .
7 is a plan view showing a stern tube sealing device according to another embodiment of the present invention.
8 is a longitudinal cross-sectional view showing the stern tube sealing device shown in FIG.
9 is an enlarged view of part “B” of FIG. 8 .
10 is a perspective view showing an oil ring and a redena ring of the stern tube sealing device according to an embodiment of the present invention.
10 is a cross-sectional view taken along line C-C' of FIG. 7 .
11 is a cross-sectional view showing a pressure providing groove of the sealing body of the stern tube sealing device according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, but should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

Throughout this specification, when a member is said to be located "on" another member, this includes not only a case in which a member is in contact with another member but also a case in which another member exists between the two members. Throughout this specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

FIG. 2 is a front view showing the stern tube sealing device according to an embodiment of the present invention, FIG. 3 is a plan view showing the stern tube sealing device shown in FIG. 2, and FIG. 4 is shown in FIG. A longitudinal sectional view showing the stern tube sealing device is shown.

Referring to these drawings, the stern tube sealing device 100 according to the present embodiment includes a sealing body 110 having a specific structure, a static absorbing member 101 , an absorbing member mounting part 102 and an electrostatic grounding line 103 . By providing a stern tube sealing device that can fundamentally block damage to the propeller shaft due to static electricity by preventing static electricity from being generated inside the stern tube by being mounted on one end of the stern tube to which the propeller shaft of the ship is mounted. can

Hereinafter, each configuration constituting the stern tube sealing apparatus 100 according to the present embodiment will be described in detail with reference to the drawings.

FIG. 5 is an enlarged view of part “A” of FIG. 4 , and FIG. 6 is a plan view showing the static absorbing member and the absorbing member mounting portion of the stern tube sealing device shown in FIG. 3 . In addition, FIG. 7 is a plan view showing a stern tube sealing device according to another embodiment of the present invention, and FIG. 8 is a longitudinal sectional view showing the stern tube sealing device shown in FIG. 7 is shown.

Referring to these drawings, the sealing body 110 of the stern tube sealing apparatus 100 according to the present embodiment is a configuration that is inserted and mounted by a predetermined depth from one end of the stern tube, and a predetermined length from one end of the stern tube. It is formed in a structure that extends as much as possible and wraps around the shaft.

The static absorbing member 101 according to the present embodiment is a configuration to be mounted on one end of the sealing body 110, is mounted so as to be in contact with a portion of the outer peripheral surface of the shaft, and is composed of a carbon material.

Specifically, as shown in FIGS. 4 to 6 , the static absorbing member 101 according to the present embodiment includes an absorbing member body part 101a having a specific structure, an absorbing member traction part 101b, and a shaft contact part 101c. ) and a contact protrusion 101d. The absorption member body portion 101a of the static electricity absorption member 101 has a block structure made of a carbon material. The absorbent member traction part 101b is a configuration that is mounted in a structure that surrounds a part of the outer surface of the absorbent member body part 101a, and is mounted on a radial rail 102a formed inside the absorbent member mounting part 102 to change the position. It may be a structure that becomes The shaft contact portion 101c is formed with an area of a predetermined size at one end of the absorption member body portion 101a, and has the same curved structure as the outer circumferential surface of the shaft. In addition, the contact protrusion 101d is configured to protrude by a predetermined height from the outer surface of the shaft contact portion 101c, and a plurality of structures continuously extending along the outer circumferential surface of the shaft may be formed to be spaced apart from each other by a predetermined interval.

In this case, according to the present embodiment, by providing the static absorbing member 101 including the absorbing member traction part 101b, the shaft contact part 101c and the contact protrusion part 101d of a specific structure, rotation of the propeller shaft of the ship As it can effectively absorb static electricity generated by static electricity, it is possible to fundamentally block the phenomenon of shaft damage caused by static electricity, thereby extending the life of the shaft and screw, preventing shaft cutting accidents, and preventing safety accidents. It is possible to provide a stern tube sealing device that does not need to separately install carbon for

The absorbing member mounting part 102 according to this embodiment is a configuration to be mounted on one end of the sealing body part 110, and has a structure that surrounds a portion of the outer surface of the static absorbing member 101 to determine the position of the static absorbing member 101 It may have a structure in which the elastic member 104 is fixed and presses the static electricity absorbing member 101 in a direction perpendicular to the outer circumferential surface of the shaft.

Specifically, the absorbing member mounting portion 102 may be configured to include a mounting fixing portion 102b and a radial rail 102a having a specific structure. The mounting fixing portion 102b of the absorbent member mounting portion 102 is a configuration to be mounted on both sides of the absorbent member mounting portion 102, and may be bound to one end surface of the sealing body 110 in a detachable structure. In addition, the radial rail 102a is a configuration formed on the inner surface of the absorption member mounting portion 102, and may be formed in a direction perpendicular to the outer peripheral surface of the shaft.

At this time, as shown in FIGS. 7 and 8 , a circumferential rail 110a having a specific structure may be formed at one end of the sealing body 110 . Specifically, the circumferential rail 110a has a structure that is recessed by a predetermined depth in a shape surrounding the outer circumferential surface of the shaft, and the mounting fixing portion 102b may be mounted so as to be repositionable along the outer circumferential surface of the shaft.

The static electricity grounding line 103 according to the present embodiment may be mounted on one side of the absorbing member mounting unit 102 and may have a structure to dissipate static electricity absorbed from the static absorbing member 101 to the outside.

In this case, according to the present embodiment, by forming the first rail and the second rail of a specific structure at a specific position, the quantity and position of the static electricity absorbing member 101 can be arranged in an optimal position according to the intention of the operator, It is possible to change the quantity and position of the absorbing member mounting portion 102 and the static absorbing member 101 according to the outer diameter of the shaft, so that it is possible to provide a stern tube sealing device that can be customized according to the specifications of the shaft.

2 to 11, according to the present embodiment, the sealing body portion 110, the oil inlet 120, the water inlet 130, the oil ring 140 and the redena ring 150 of a specific structure. ), it is mounted at one end of the stern tube to which the propeller shaft of the ship is mounted, stably maintaining the sealing state inside the stern tube, and at the same time having a structure that makes maintenance of the stern tube sealing device easy, excellent durability and low cost It is possible to provide a stern tube sealing device that requires repair costs.

The sealing body 110 according to the present embodiment is a configuration that is inserted and mounted from one end of the stern tube by a predetermined depth, and extends from one end of the stern tube by a predetermined length to surround the shaft.

The oil inlet 120 has a structure that enters from one side of the sealing body 110 toward the center of the sealing body 110 , and can inject sealing oil into the oil ring 140 .

The water inlet 130 has a structure that enters from one side of the sealing body 110 toward the center of the sealing body 110, and water is injected within a specific pressure range between the sealing body 110 and the shaft circumference. can do.

The oil ring 140 is a component mounted inside one end of the sealing body 110 , and has a ring structure that seals between the sealing body 110 and the shaft circumference, and an oil delivery hole introduced from the oil inlet 120 . (140a) may be formed.

9 and 10 , the oil ring 140 according to this embodiment has a specific structure of the first contact side 141 , the second contact side 142 , the central connection portion 143 , and the first It may be configured to include an indentation groove 144 and a second indentation groove 145 . Specifically, the first contact side surface 141 of the oil ring 140 has a ring structure having an outer diameter of a predetermined length, and forms one side surface having a width of a predetermined length. The second contact side surface 142 has a ring structure having an outer diameter of the same length as that of the first contact side surface 141 , and forms the other side surface having a width of a predetermined length. The central connection part 143 is formed in an integral structure with the first contact side surface 141 and the second contact side surface 142, and the first contact side surface 141 and the second contact side surface 142 are spaced apart by a predetermined length. and an oil delivery hole 140a is formed in the central portion. The first recessed groove 144 has a structure recessed by a predetermined depth from the outer circumferential surface of the central connection part 143 . In addition, the second indentation groove 145 is indented by a predetermined depth from the inner circumferential surface of the central connection part 143 .

In addition, the redena ring 150 is a configuration mounted inside one end of the sealing body part 110, and is disposed in close contact with one side and the other side of the oil ring 140, and the sealing body part 110 and the shaft It may have a ring structure that seals between the perimeters.

In this case, according to this embodiment, the first contact side 141, the second contact side 142, the central connection portion 143, the first indentation groove 144 and the second indentation groove 145 of a specific structure are formed. By providing the oil ring 140 including A sealing device may be provided.

The sealing body part 110 according to the present embodiment may have a configuration including the first inserting part 111 , the second inserting part 112 and the main body extension part 113 having a specific structure.

Specifically, the first insertion part 111 of the sealing body part 110 is a structure that is inserted by a predetermined depth inward from one end of the stern tube, has a structure having the same outer diameter as the inner diameter of the stern tube, and the shaft circumference at the center It is possible to form a rotating space of the enclosing structure. In some cases, as shown in FIG. 2 , a sealing groove 111a may be formed on the outer circumferential surface of the first insertion part 111 to have a structure recessed by a predetermined depth along the outer circumferential surface.

The second insertion part 112 of the sealing body part 110 is configured to protrude by a predetermined length from one end surface of the first insertion part 111, and has a structure spaced apart by a predetermined distance from the inner circumferential surface of the stern tube, and the center It is possible to form a rotational space of the structure surrounding the shaft in the periphery.

The body extension part 113 of the sealing body part 110 has a cylindrical structure extending laterally by a predetermined length to surround one end of the stern tube, and may be bound to one end of the stern tube.

At this time, it is preferable that the oil inlet 120 and the water inlet 130 are formed in the main body extension 113 .

FIG. 9 is an enlarged view of part B of FIG. 8 , and FIG. 10 is a perspective view showing an oil ring and a redena ring of a stern tube sealing device according to an embodiment of the present invention, and FIG. A cross-sectional view along the line C-C' is shown.

8 to 11 , the stern tube sealing apparatus 100 according to the present embodiment may be configured to further include a ring mounting groove 114 and a ring fixing plate 115 having a specific structure.

Specifically, the ring mounting groove 114 according to the present embodiment is a configuration formed at one end of the sealing body part 110, and has a structure recessed by a predetermined depth from the inner peripheral surface surrounding the shaft circumference, and the sealing body part 110 ) may have a structure extending from one end to a predetermined depth.

In addition, the ring fixing plate 115 is a configuration that is bolted to one end of the sealing body part 110, and has a plate-shaped structure having the same shape as the one end surface of the sealing body part 110, and has a through hole surrounding the shaft in the central part. can be formed.

At this time, it is preferable that the redena ring 150 and the oil ring 140 are mounted in the ring mounting groove 114 , and the redena ring 150 and the oil ring 140 are fixed by the ring fixing plate 115 .

In this case, according to the present embodiment, by providing the ring mounting groove 114 and the ring fixing plate 115 of a specific structure, the bolted state of the ring fixing plate 115 is separated and the ring mounted in the ring mounting groove 114 is separated. Since the denaring 150 and the oil ring 140 can be easily replaced or managed, it is possible to provide a stern tube sealing device that requires a low repair cost.

In addition, according to this embodiment, by mounting the oil ring 140 and the redena ring 150 of a specific structure in a double structure, continuous sealing is possible without a packing material, and shaft abrasion phenomenon and packing exchange operation can be omitted. And, by composing the material with acetal, it is possible to provide a stern tube sealing device with excellent durability and low repair cost.

On the other hand, as shown in FIGS. 8 and 11 , the sealing body part 110 may be configured to further include a pressure providing groove 116 having a specific structure.

Specifically, the pressure providing groove 116 according to the present embodiment is a configuration formed on the inner circumferential surface of the sealing body part 110 surrounding the shaft circumference, and is spaced apart by a predetermined angle about the shaft's axis of rotation. . More specifically, the pressure providing groove 116 according to the present embodiment has a structure formed in a direction parallel to the extension length of the shaft by being recessed by a predetermined depth from the inner circumferential surface of the sealing body part 110, and the sealing body part 110 It is possible to provide a predetermined amount of pressure to the space formed between the and shaft circumference.

In the above detailed description of the present invention, only specific embodiments thereof have been described. However, it is to be understood that the present invention is not limited to the particular form recited in the detailed description, but rather, it is to be understood to cover all modifications and equivalents and substitutions falling within the spirit and scope of the present invention as defined by the appended claims. should be

That is, the present invention is not limited to the specific embodiments and descriptions described above, and any person skilled in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims can implement various modifications are possible, and such modifications shall fall within the protection scope of the present invention.

10: Stern Hall
20: shaft
100: stern tube sealing device
101: static absorbing member
101a: absorption member body portion
101b: absorbent member traction part
101c: shaft contact
101d: contact protrusion
102: absorbent member mounting portion
102a: radial rail
102b: mounting fixture
103: electrostatic grounding line
104: elastic member
110: sealing body part
110a: circumferential rail
111: first insertion part
111a: sealing groove
112: second insertion part
113: body extension
114: ring mounting groove
115: ring fixing plate
115a: bolting fastening member
116: pressure providing groove
120: oil inlet
130: water inlet
140: oil ring
140a: oil delivery hole
141: first contact side
142: second contact side
143: central connection
144: first manipulating home
145: 2nd manipulating home
150: redena ring

Claims (5)

As a stern tube sealing device 100 mounted on one end of the stern tube which is in close contact with the periphery of the shaft of the ship to form a shaft rotation space therein,
a sealing body 110 inserted and mounted from one end of the stern tube by a predetermined depth, extending from one end of the stern tube by a predetermined length to surround the shaft;
a static absorbing member 101 mounted on one end of the sealing body 110, mounted to come into contact with a portion of an outer circumferential surface of the shaft, and made of a carbon material;
It is mounted on one end of the sealing body 110, and fixes the position of the static absorbing member 101 in a structure that surrounds a portion of the outer surface of the static absorbing member 101, and the static absorbing member 101 is connected to the outer circumferential surface of the shaft Absorbent member mounting portion 102 with a built-in elastic member 104 for pressing in the vertical direction; and
an electrostatic grounding line 103 mounted on one side of the absorbing member mounting part 102 and dissipating the static electricity absorbed from the static absorbing member 101 to the outside;
including,
The static absorbing member 101,
Absorbing member body portion (101a) of a block structure composed of a carbon material;
The absorbent member traction part 101b of a structure that is mounted to surround a part of the outer surface of the absorbent member body 101a and is mounted on the radial rail 102a formed inside the absorbent member mounting part 102 to change the position. ;
a shaft contact portion 101c formed with an area of a predetermined size at one end of the absorbing member body portion 101a and having the same curved structure as an outer circumferential surface of the shaft; and
a plurality of contact protrusions 101d protruding from the outer surface of the shaft contact portion 101c by a predetermined height and having a structure continuously extending along the outer circumferential surface of the shaft and spaced apart from each other by a predetermined interval;
Stern tube sealing device comprising a.
delete According to claim 1,
The absorbent member mounting portion 102,
a mounting and fixing part (102b) mounted on both sides of the absorption member mounting part (102) and coupled to one end surface of the sealing body part (110) in a detachable structure; and
a radial rail (102a) formed on the inner surface of the absorbing member mounting part (102) and formed in a direction perpendicular to the outer circumferential surface of the shaft;
Stern tube sealing device comprising a.
4. The method of claim 3,
The sealing body part 110,
It is formed at one end of the sealing body 110, has a structure that is recessed by a predetermined depth in a form that surrounds the outer circumferential surface of the shaft, and the circumferential rail for mounting the mounting fixing part 102b so as to be able to change the position along the outer circumferential surface of the shaft (110a);
Stern tube sealing device comprising a.
According to claim 1,
The stern tube sealing device,
An oil inlet 120 having a structure that enters from one side of the sealing body 110 toward the center of the sealing body 110 and injecting sealing oil into the oil ring 140;
A water inlet 130 for injecting water within a specific pressure range between the sealing body 110 and the shaft circumference and has a structure that enters from one side of the sealing body 110 toward the center of the sealing body 110 from the side. ;
An oil ring ( 140); and
Mounted inside one end of the sealing body part 110, it is disposed in close contact with one side and the other side of the oil ring 140, and has a ring structure that seals between the sealing body part 110 and the shaft circumference. (150);
Stern tube sealing device comprising a.

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