KR102479231B1 - Mecanical seal, the manufacturing method thereof, and the driving method thereof - Google Patents

Abstract

The present invention provides a more perfect seal despite axial deformation of a ship shaft by a sealing ring made of graphite and fluid pressure by a seawater pump injected into the graphite ring. The present invention relates to a mechanical seal, a manufacturing method thereof, and a driving method thereof.

Description

Mechanical seal, manufacturing method thereof, and driving method thereof {Mecanical seal, the manufacturing method thereof, and the driving method thereof}

The present invention relates to a mechanical seal, a manufacturing method thereof, and a driving method thereof, and specifically, a sealing ring made of graphite and a seawater pump injected into the graphite ring. It is an invention characterized in that it can provide more perfect sealing and watertightness even when the shaft of a ship shaft is deformed by fluid pressure.

Figure 1 is a view showing the appearance of a conventional stern tube seal provided in a ship.

A fan (10) is provided at the stern of the ship (20) to provide propulsion for the movement of the ship (20), and this fan (10) is driven by an engine (40) through a shaft (30). is connected with And, the shaft 30 is exposed to the outside of the ship 20 through the stern tube 50, that is, the stern tube. Therefore, it is necessary to seal the end of the stern tube 50 so that external seawater does not flow into the inside of the ship 20, and the seal serving this role is usually referred to as a stern tube seal. The stern tube seal plays a very important role because it prevents contaminants in the engine room from leaking out and at the same time prevents seawater from entering the engine room.

Figure 2 is a simplified view of Figure 1 in order to explain the problems of the conventional stern tube seal provided in the ship, and Figure 3 is an enlarged view of the 'SA' portion of Figure 2.

The conventional stern tube seal 60 is usually formed of a metal material, and seals the stern tube 50 by providing a bearing 70 and lubricating oil therein. By the way, the shaft 30, the stern tube 50, etc. of the ship 20 are continuously affected by the seawater pressure caused by the external seawater ('OP', hereinafter also referred to as the second fluid), and due to this, the shaft ( 30) is twisted or the axis is changed, and the conventional stern tube seal 60 made of metal cannot reflect and cope with the deformation, resulting in a problem in that sealing performance is reduced. That is, as the shaft 30 rotates in a situation where the pressure of the second fluid OP acts, the shaft of the shaft 30 is twisted or worn as shown in FIG. 3, resulting in deformation of the shaft. Permanent deformation occurs in the conventional stern tube seal 60 provided in the stern tube 50 and/or the stern tube 50 due to friction between steel materials. As a result, the external seawater, that is, the second fluid (OP) flows into the deformed space of the conventional stern tube seal 60, causing the ship 20 to be flooded.
For reference, the following patent document 1 is an invention related to a device for preventing bilge generation for a ship that prevents the generation of bilge generated when seawater flowing into the engine room of a ship is mixed with various contaminants and prevents the packing means from being easily torn. Patent Document 2 below is an invention related to a device for preventing bilge generation for ships that can fundamentally prevent bilge generation by completely blocking the inflow of seawater into the engine room, and Patent Document 3 below relates to a watertight device for a rotating shaft It relates to an invention characterized by preventing wear or damage of mechanical elements of a power transmission system by dispersing the external force intensively applied to the engine side and stably driving the power transmission system.

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Korean Utility Model Registration No. 20-0489797 (2019.08.08., notice) Korean Patent Publication No. 10-2009-0082849 (2009.07.31., notice)

The present invention has been made to solve the above problems, and even if the axis of the shaft 30 is worn or deformed, a mechanical seal capable of maintaining watertightness through the graphite ring 100 that is deformed correspondingly according to the deformation of the shaft, It is intended to provide a manufacturing method thereof and a driving method thereof.

In addition, it is intended to provide a mechanical seal capable of securing stable watertightness and sealing by offsetting the seawater pressure by using the fluid pressure injected by the seawater pump, a manufacturing method thereof, and a driving method thereof.

In addition, it is intended to provide a mechanical seal whose maintenance is easy through a simple structure and configuration, a manufacturing method thereof, and a driving method thereof.

In order to achieve the above object, the present invention provides a mechanical seal comprising a graphite ring.

In addition, the mechanical seal further comprises a metal ring having a second sealing face contacting the first sealing face of the graphite ring.

In addition, it provides a mechanical seal characterized in that it further comprises; collar (collar) located on the opposite side of the second sealing face of the metal ring.

In addition, the metal ring and the collar provide a mechanical seal, characterized in that located on the rotor side.

In addition, the metal ring provides a mechanical seal, characterized in that formed of stainless steel (stainless steel).

In addition, the graphite ring provides a mechanical seal characterized in that a fluid inlet through which the first fluid is introduced is formed.

In addition, the first fluid provides a mechanical seal, characterized in that introduced by the sea water pump (pump) of the ship.

In addition, it provides a mechanical seal characterized in that a separation space is formed between the graphite ring and the rotor.

In addition, the mechanical seal is characterized in that the first fluid introduced into the fluid inlet of the graphite ring is discharged through the separation space.

In addition, the rotor provides a mechanical seal, characterized in that the shaft (shaft) of the ship.

In addition, a mechanical seal is provided in which an engine is connected to one side of the shaft and a fan is connected to the other side of the shaft.

In addition, the mechanical seal further comprises a reinforcing bellows connected to the opposite side of the first sealing face of the graphite ring.

In addition, the graphite ring and the reinforcing bellows provide a mechanical seal, characterized in that connected using a first clamp (clamp).

In addition, the reinforcement bellows provides a mechanical seal characterized in that irregularities are formed.

In addition, a bush (bush) connected to the reinforcing bellows; further comprising, wherein the bush provides a mechanical seal characterized in that connected to the side opposite to the side to which the first clamp is connected.

In addition, the reinforcing bellows and the bush provide a mechanical seal, characterized in that connected using a second clamp.

In addition, the bush provides a mechanical seal, characterized in that formed of bronze.

In addition, the bush, the reinforcing bellows, and the graphite ring provide a mechanical seal, characterized in that located on the stator side.

In addition, the stator provides a mechanical seal, characterized in that the stern tube.

In addition, the bush provides a mechanical seal, characterized in that an opening through which the first fluid or the second fluid can move between the inside of the reinforcing bellows and the inside of the stern tube is formed.

In addition, it provides a mechanical seal, characterized in that a tube bearing (tube bearing) for supporting the rotor is provided inside the stern tube.

In addition, it provides a mechanical seal characterized in that the opening is formed in the tube bearing.

In addition, the second fluid provides a mechanical seal, characterized in that generated by the pressure outside the stern tube.

In addition, the present invention includes the steps of injecting the first fluid into the nipple connection pipe of the graphite ring; It provides a driving method for a mechanical seal, characterized in that it includes; rotating the metal ring as the rotor rotates.

In addition, after the step of rotating the metal ring as the rotor rotates, the step of forming a fluid film between the first sealing face of the graphite ring and the second sealing face of the metal ring; mechanical characterized in that it is further included It provides a way to drive the yarn.

In addition, after the step of injecting the first fluid into the nipple connection pipe of the graphite ring, the step of discharging the first fluid through the separation space between the graphite ring and the rotor; mechanical characterized in that it further comprises It provides a way to drive the yarn.

In addition, after the step of discharging the first fluid through the separation space between the graphite ring and the rotor, the step of equalizing the pressure of the first fluid and the pressure of the second fluid; characterized in that it is further included. It provides a driving method for a mechanical seal.

In addition, a collar is positioned on a side opposite to the second sealing face of the metal ring, and the metal ring and the collar are positioned on a side of the rotor.

In addition, it provides a method for driving a mechanical seal, characterized in that the first fluid is introduced by a seawater pump.

In addition, the rotor is a shaft of a ship, an engine is connected to one side of the shaft, and a fan is connected to the other side of the shaft.

In addition, a method of driving a mechanical seal is provided, wherein a reinforcement bellows having irregularities is connected to the opposite side of the first sealing face of the graphite ring using a first clamp.

In addition, a mechanical seal driving method is provided, characterized in that a bush formed of bronze is connected to the opposite side of the reinforcing bellows to which the first clamp is connected using a second clamp.

In addition, the bush, the reinforcing bellows, and the graphite ring are located on the side of the stator, and the stator provides a method of driving a mechanical seal, characterized in that the stern tube.

In addition, the bush provides a method of driving a mechanical seal, characterized in that an opening through which the first fluid and/or the second fluid can move is formed between the inside of the reinforcing bellows and the inside of the stern tube.

In addition, there is provided a method of driving a mechanical seal, characterized in that a tube bearing having an opening is formed inside the stern tube to support the rotor.

In addition, the present invention comprises the steps of manufacturing a graphite ring; Forming a fluid inlet in the graphite ring; provides a method for manufacturing a mechanical seal, characterized in that it is included.

In addition, the graphite ring or the fluid inlet provides a method of manufacturing a mechanical seal, characterized in that manufactured or formed through compression molding.

In addition, the graphite ring provides a method of manufacturing a mechanical seal, characterized in that it is manufactured to have a flat first sealing face in contact with the second sealing face.

In addition, the present invention is a graphite ring (ring); A metal ring having a second sealing face in contact with the first sealing face of the graphite ring, wherein at least one O-ring is provided inside the metal ring. It provides a mechanical thread that does.

In addition, the graphite ring provides a mechanical seal characterized in that a fluid inlet through which the first fluid is introduced is formed.

In addition, a mechanical seal is provided in which a nipple connection pipe is connected to the fluid inlet.

In addition, the present invention includes the steps of injecting the first fluid into the nipple connection pipe of the graphite ring; Rotating a metal ring as the rotor rotates; the metal ring is formed of stainless steel, and one or more O-rings are provided inside the metal ring. do.

In addition, the present invention comprises the steps of manufacturing a graphite ring; Forming a fluid inlet in the graphite ring; and providing a method of manufacturing a mechanical seal, characterized in that a nipple connection pipe is connected to the fluid inlet.

According to the mechanical seal, its manufacturing method, and its driving method according to the present invention, the following effects are obtained.

First, by applying a graphite ring to the sealing face, there is an effect of providing more perfect sealing and watertightness. Therefore, it is possible to completely prevent the inflow of seawater into the ship or the leakage of contaminants such as oil from the engine room to the outside. In addition, it provides excellent heat resistance and corrosion resistance to the present invention, and also has an effect of ensuring that the metal ring rotates lubricated even in a state of close contact.

Second, even if the axis of the shaft is slightly deformed according to the operation of the ship, the graphite ring is worn and deformed according to the axis deformation, so that the watertight ability is continuously maintained.

Third, by introducing the fluid pressure generated by the seawater pump into the graphite ring, the graphite ring is cooled, and at the same time, the seawater pressure introduced through the tube bearing of the stern tube is offset, thereby improving the sealing performance through the graphite ring. can be further improved. That is, watertightness may be maximized by forming a watertight wall between the graphite ring and the shaft as well as a sealing face between the graphite ring and the metal ring.

Fourth, through a simple structure and configuration, maintenance is very easy compared to existing or conventional mechanical seals. That is, since only the graphite ring needs to be replaced when the sealing performance is reduced or the periodic replacement period arrives, the ship operator can directly perform maintenance.

Fifth, the structure is simpler than that of conventional mechanical seals, and thus, there is an effect of being able to manufacture and supply at low cost.

Figure 1 is a view showing the appearance of a conventional stern tube seal provided in a ship.
Figure 2 is a schematic diagram of Figure 1 in order to explain the problems of the conventional stern tube seal provided in the ship.
Figure 3 is an enlarged view of the 'SA' portion of Figure 2.
Figure 4 is a simplified diagram for explaining the concept of a mechanical seal according to the present invention.
Figure 5 is an enlarged view showing the 'SB' part of Figure 4.
Figure 6 is a view showing the overall appearance of the mechanical seal according to the present invention.
7 is a view showing the mechanical seal according to the present invention viewed from the side.
8 is an enlarged view of a color among components of a mechanical seal according to the present invention.
9 is an enlarged view of a metal ring among components of a mechanical seal according to the present invention.
Figure 10 is an enlarged view showing a graphite ring among components of a mechanical seal according to the present invention.
Figure 11 is a view showing a state in which a nipple connection pipe is installed in the fluid inlet of the graphite ring, which is a component of the present invention.
Figure 12 is an enlarged view of isotropic graphite applied to the graphite ring of the present invention.
Figure 13 is an enlarged view of anisotropic graphite in contrast to isotropic graphite.
Figure 14 is an enlarged view showing the appearance of the reinforcing bellows, which is a component of the present invention.
Figure 15 is a view showing an enlarged view of a bush, which is a component of the present invention.
Figure 16 is a view showing an enlarged view of a clamp, which is a component of the present invention.
Figure 17 is a cross-sectional view showing a portion to which a mechanical seal according to the present invention is applied.
Figure 18 is an enlarged view of a portion where the graphite ring is located in Figure 17.
Figure 19 is a more enlarged view of a portion of the graphite ring in Figure 18.
Figure 20 is a diagram briefly showing the flow of fluid inside the stern tube to which the present invention is applied.
Figure 21 is an enlarged view of the tube bearing part at the end of the stern tube.
22 is a flowchart showing a method of driving a mechanical seal according to the present invention.
Figure 23 is a flow chart showing a method of manufacturing a mechanical seal according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the present invention can have various changes and various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, it should be understood that this is not intended to limit the present invention to the specific disclosed form, and includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Also, in the description of the present invention, terms such as “first” and “second” are used only for the purpose of distinguishing one component from another component, and are not used to limit any meaning. In addition, singular expressions include plural expressions unless the context clearly indicates otherwise, and terms such as “include” or “have” refer to features, numbers, steps, operations, components, parts, or the like described in the specification. It is intended to specify that a combination thereof exists, but it should be understood that it does not preclude the possibility of existence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Figure 4 is a simplified diagram for explaining the concept of a mechanical seal according to the present invention.

As described above, since most of the components of the conventional stern tube seal 60 are formed of a metal material, even if permanent deformation occurs due to deformation of the shaft 30 due to wear, twist, etc. of the sealing member However, the mechanical seal 1000 according to the present invention adopts the graphite ring 100 as its component, so that its watertightness can be continuously maintained despite such deformation. . In addition, in response to the second fluid OP flowing in from the outside, the first fluid PP is introduced into the mechanical seal 1000 using a seawater pump to maintain improved watertightness by forming a watertight wall through pressure equalization. can

Figure 5 is an enlarged view showing the 'SB' part of Figure 4.

The shaft of the shaft 30 in the stern tube 50 is worn or twisted by the pressure of the first fluid OP, that is, the seawater pressure, so that the shaft may be deformed. In addition, since the graphite ring 100 of the mechanical seal 1000 according to the present invention is worn in response to the deformation of the shaft 30, the sealing performance is maintained. In addition, a watertight wall is formed between the shaft 30 and the graphite ring 100 by injecting a second fluid by a seawater pump to offset the pressure of the first fluid, thereby further improving waterproof performance.

Hereinafter, a mechanical seal according to the present invention that achieves these functions, a manufacturing method thereof, and a driving method thereof will be confirmed in detail through drawings.

Figure 6 is a view showing the overall appearance of the mechanical seal according to the present invention.

The mechanical seal 1000 according to the present invention may include a graphite ring 100, a metal ring 200, a collar 300, a reinforcing bellows 400, and a bush 500. In addition, a first clamp 610 for firmly fixing and connecting the graphite ring 100 and the reinforcing bellows 400, and a second clamp for fixing between the reinforcing bellows 400 and the bush 500 ( 620) may be further included. In addition, a nipple connection pipe 700 for introducing a first fluid into the graphite ring 100 may be further included.

7 is a view showing the mechanical seal according to the present invention viewed from the side.

In the mechanical seal 1000 according to the present invention, the collar 300 and the metal ring 200 are located on the rotor side RS, and the graphite ring 100, the reinforcing bellows 400, the bush 500 and these The first clamp 610 and the second clamp 620, which are connected and fixed therebetween, are located on the stator side (PS). Here, the rotor may be the shaft 30 and the stator may be the stern tube 50. Therefore, a sealing face is located between the metal ring 200 and the graphite ring 100 along with a watertight wall formed between the graphite ring 100 and the shaft 30 according to the first fluid injection of the seawater pump. will do For reference, in the description of the present invention, watertight wall, sealing face, sliding surface, etc. are used as the same meaning, and watertightness, watertight ability, sealing, sealability, waterproofness, sealing performance, etc. are also used as the same meaning.

The mechanical seal according to the present invention can ensure more perfect sealing performance through this configuration, so that the second fluid, which is seawater, flows into the ship or the outflow of contaminants such as oil from the engine room to the outside. There is a preventive effect.

Hereinafter, each of the components of the present invention will be described in detail one by one.

First, FIG. 8 is an enlarged view of a collar among components of a mechanical seal according to the present invention, and FIG. 9 is an enlarged view of a metal ring among components of a mechanical seal according to the present invention.

The collar 300 and the metal ring 200 are located on the side of the rotor and can rotate together as the shaft 30 rotates. Among them, the collar 300 serves to firmly support the metal ring 200 so that the graphite ring 100 and the metal ring 200 maintain close contact with each other, and serves as a first sealing of the graphite ring 100. The metal ring 200 having the second sealing face 210 in contact with the face 110 maintains watertightness between the graphite ring 100 and the metal ring 200 despite the rotation of the shaft 30. play a role in maintaining In addition, the metal ring 200 may have one or more O-rings 220 formed of a rubber material therein to provide more stable watertightness and sealing performance.

Next, components located in the stern tube 50 on the stator side will be reviewed.

Figure 10 is an enlarged view of a graphite ring among the components of the mechanical seal according to the present invention, and Figure 11 is a view showing a state in which a nipple connection pipe is installed in the fluid inlet of the graphite ring, which is a component of the present invention.

In the mechanical seal 1000 according to the present invention, the graphite ring 100 is a component that plays a very important role in securing the watertight performance required by the present invention, and is made of graphite as the term itself indicates.

The graphite ring 100 has a first sealing face 110 in contact with the second sealing face 210 of a metal ring 200 that can be made of stainless steel, and the graphite ring 100 A fluid inlet 120 is formed to introduce a first fluid into the inside. In addition, a nipple connection pipe 700 may be installed in the fluid inlet 120 as shown in FIG. 11 so that the first fluid PP introduced by the seawater pump can be better introduced.

In the present invention, by employing the graphite ring 100 as a component, it is possible to secure excellent heat resistance and corrosion resistance, and it is possible to ensure that the metal ring 200 rotates lubricatingly even in a state of close contact.

To this end, the graphite ring 100 applied to the present invention may be manufactured using isotropic graphite.

FIG. 12 is an enlarged view of isotropic graphite applied to the graphite ring of the present invention, and FIG. 13 is an enlarged view of anisotropic graphite in contrast to isotropic graphite.

As can be seen from the drawing, in contrast to anisotropic graphite, isotropic graphite has a fine particle structure, uniform quality, and high strength. In particular, it is superior in terms of corrosion resistance, heat resistance, fire resistance, and electrical conductivity.

By selecting the graphite ring 100 made of isotropic graphite, the mechanical yarn 1000 according to the present invention can provide a lightweight mechanical yarn having a smaller bulk density than conventional mechanical yarns made of metal. For reference, although using isotropic graphite is an optimal example, it should be noted that the present invention is not intended to limit the use of anisotropic graphite. In addition, various types of graphite powder such as graphite, carbon graphite, and resin-impregnated lacquer may be used as graphite powder used when manufacturing the graphite ring 100.

A process in which the first fluid is introduced into the graphite ring 100 through the nipple connection pipe 700 and a watertight wall is created will be described in more detail through the following drawings.

Hereinafter, the remaining components constituting the present invention will be continuously described.

Figure 14 is an enlarged view of a reinforcing bellows, which is a component of the present invention, and Figure 15 is an enlarged view of a bush, which is a component of the present invention, and Figure 16 is a view of a clamp, which is a component of the present invention. This is an enlarged drawing.

The reinforcing bellows 400 constituting the present invention applies force to the graphite ring 100 in the direction of the metal ring 200 to maintain a continuous close contact between the graphite ring 100 and the metal ring 200. It is a configuration that performs To this end, the reinforcing bellows 400 is connected to the opposite side of the graphite ring 100 to the first sealing face 110 by using a first clamp 610, and the concavo-convex 410 is formed to provide elasticity. can

Finally, the bush 500 is connected to the reinforcing bellows 400, and specifically, to the reinforcing bellows 400 on the opposite side to the side to which the first clamp 610 is connected using a second clamp 620. Can be connected. The bush 500 has an opening H through which the first fluid PP or the second fluid OP can move between the inside of the reinforcing bellows 400 and the inside of the stern tube 50, and can be made of bronze. there is. Additionally, the first clamp 610 and the second clamp 620 firmly fix the coupling between the respective components and serve to seal between them.

The mechanical seal 1000 according to the present invention can provide more improved sealing ability than the conventional stern tube seal 60 through this configuration.

Figure 17 is a cross-sectional view showing a portion to which a mechanical seal according to the present invention is applied, and Figure 18 is an enlarged view showing a portion where a graphite ring is located in Figure 17.

A perturbation surface, a sealing face SF, is located between the rotating metal ring 200 and the fixed graphite ring 100, and maintaining good sealing performance of this part is essential to maintaining good overall sealing performance. It affects a lot.

In the present invention, since the sealing member in contact with the metal ring 200 made of stainless steel is manufactured using graphite, even if a slight inclination occurs in the metal ring 200 due to deformation of the axis of the shaft 30, graphite Since the ring 100 is correspondingly worn, it is possible to continuously maintain the watertightness of the sealing face. In addition, this fitting deformation may also be made between the graphite ring 100 and the shaft 30 .

Referring to FIG. 18, it can be seen that a separation space DS is formed between the graphite ring 100 and the shaft 30 as a rotor. The separation space DS may be basically formed when the graphite ring 100 is manufactured, or may be naturally formed as the graphite ring 100 is worn as the shaft 30 rotates. Therefore, the conventional stern tube seal 60 made of steel has reduced seal performance due to permanent deformation of the components during axial deformation, but the mechanical seal 1000 according to the present invention has a graphite ring 100 deformed As it is worn according to the section, the sealing performance is continuously guaranteed. In addition, the watertightness is also ensured by the first fluid PP injected into the graphite ring 100, and this part will be described in detail through the following drawings.

Figure 19 is a more enlarged view of a portion of the graphite ring in Figure 18.

A fluid inlet 120 is formed in the graphite ring 100 of the mechanical seal 1000 according to the present invention, and a nipple connection pipe 700 may be installed in the fluid inlet 120. Through the nipple connection pipe 700, the first fluid (PP) delivered by the seawater pump is introduced, and the first fluid (PP) introduced in this way cools the heat generated in the graphite ring 100 and is watertight. A wall may be formed to further enhance the sealing performance of the mechanical seal 1000 according to the present invention. Specifically, the introduced first fluid PP is introduced between the graphite ring 100 and the shaft 30 to form a watertight wall that offsets the second fluid OP introduced from the outside of the ship 20 . In addition, the first fluid PP introduced between the first sealing face 110 of the graphite ring 100 and the second sealing face 210 of the metal ring 200 also forms a watertight wall and sealing face therebetween. will do

Figure 20 is a view briefly showing the flow of fluid inside the stern tube to which the present invention is applied, and Figure 21 is an enlarged view showing the tube bearing portion at the end of the stern tube.

The tube bearing 800, also called a goku board, serves to support the shaft 30 within the stern tube 50, and an opening H is formed in the tube bearing 800. Then, the second fluid OP outside the vessel 20 is introduced through the opening H. The seawater outside the ship 20, that is, the second fluid OP, affects the shaft 30, the stern tube 50, etc. by sea pressure, and the tube bearing 800 installed at the end of the stern tube 50 It is introduced into the inside of the stern tube 50 through the opening H of the , and may affect the sealing area.

The mechanical seal 1000 according to the present invention offsets the influence of the second fluid OP through the first fluid PP introduced by the seawater pump. That is, since the watertight walls formed by the first fluid introduced into the graphite ring 100 through the nipple connection pipe 700 remove the pressure of the second fluid OP introduced from the outside, the shaft 30 Even during the rotation process, the sealing state is stably maintained between the graphite ring 100 and the metal ring 200 and between the graphite ring 100 and the shaft 30 .

Therefore, the mechanical seal 1000 according to the present invention can secure high sealing performance even through such a simple structure, and can be supplied at a relatively low cost compared to existing sealing members for ships due to its simple structure. .

Figure 22 is a flow chart showing a method of driving a mechanical seal according to the present invention.

First, the method of driving the mechanical seal according to the present invention may be performed from the process of injecting the first fluid into the nipple connection pipe 700 of the graphite ring 100 by operating the seawater pump (S1-1). Next, the injected first fluid PP may be discharged into the separation space formed between the graphite ring 100 and the shaft 30 (S1-2). Alternatively, it may be discharged into the stern tube 50 through the separation space. Through this process, a watertight wall, which is a sealing face, may be formed between the graphite ring 100 and the shaft 30 by offsetting the pressure of the second fluid OP introduced from the outside. In addition, as the shaft 30 rotates simultaneously or simultaneously with the injection of the first fluid, the metal ring 200 may rotate together (S1-4), and according to this rotation, the second part of the metal ring 200 A fluid film is also formed between the sealing face 210 and the first sealing face 110 of the graphite ring 100 to maintain sealing of the mechanical seal 1000 according to the present invention.

Through this drive, the present invention has the effect of ensuring more perfect watertightness compared to the existing sealing member for ships.

Figure 23 is a flow chart showing a method of manufacturing a mechanical seal according to the present invention.

In order to manufacture the graphite ring 100, which is an essential component of the mechanical yarn 1000 according to the present invention, a process of manufacturing the graphite ring 100 by compression molding kneaded graphite using a mold may be performed first ( S2-1). Here, in the compression molding, a cold isoslateric pressure (CIP) molding method may be used so that the manufactured graphite ring 100 has uniform physical properties. After the graphite ring 100 is manufactured, a process of forming the fluid inlet 120 through which the first fluid is introduced may proceed (S2-2). For reference, the graphite ring 100 has a fluid inlet ( 120) may be formed after the graphite ring 100 is manufactured, but may also be formed simultaneously during compression molding.

In the present invention, by using the graphite ring 100 manufactured in this way, even when the sealing property is reduced, only the graphite ring 100 needs to be replaced, so that the maintenance is very simple, and even a ship operator without professional knowledge can directly maintain There is an effect that can be repaired.

As described above, although it has been described with reference to the preferred embodiments of the present invention, those skilled in the art will variously modify the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. And it will be understood that it can be changed.

10 : fan
20: ship
30: shaft
40: engine
50: stern tube
60: conventional stern tube seal
70: bearing
100: graphite ring
110: first sealing face
120: fluid inlet
200: metal ring
210: second sealing face
220: O-ring
300: color
400: reinforced bellows
410: uneven
500: Bush
610: first clamp
620: second clamp
700: nipple connector
800: tube bearing
1000: mechanical seal according to the present invention

Claims (38)

graphite rings;
a reinforcing bellows connected to the opposite side of the first sealing face of the graphite ring;
It includes; a bush connected to the reinforcing bellows,
The graphite ring and the reinforcing bellows are connected using a first clamp,
The bush is connected to the side opposite to the side to which the first clamp is connected,
The bush, the reinforcing bellows, and the graphite ring are located on the side of the stator,
The stator is a mechanical seal, characterized in that the stern tube.
According to claim 1,
and a metal ring having a second sealing face contacting the first sealing face of the graphite ring.
According to claim 2,
The mechanical seal, characterized in that it further comprises; a collar (collar) located on the opposite side of the second sealing face of the metal ring.
According to claim 3,
The mechanical seal, characterized in that the metal ring and the collar are located on the rotor side.
According to claim 2,
The mechanical seal, characterized in that the metal ring is formed of stainless steel (stainless steel).
According to claim 1,
The mechanical seal, characterized in that the graphite ring is formed with a fluid inlet through which the first fluid is introduced.
According to claim 6,
The mechanical seal, characterized in that the first fluid is introduced by the sea water pump (pump) of the ship.
According to claim 1,
A mechanical seal, characterized in that a separation space is formed between the graphite ring and the rotor.
According to claim 8,
The mechanical seal, characterized in that the first fluid introduced into the fluid inlet of the graphite ring is discharged through the separation space.
According to claim 4 or 8,
The rotor is a mechanical seal, characterized in that the shaft (shaft) of the ship.
According to claim 10,
An engine is connected to one side of the shaft,
A mechanical seal, characterized in that a fan is connected to the other side of the shaft.
According to claim 1,
Mechanical seal, characterized in that the reinforcement bellows is formed with irregularities.
According to claim 1,
The mechanical seal, characterized in that the reinforcing bellows and the bush are connected using a second clamp.
According to claim 1,
The mechanical seal, characterized in that the bush is formed of bronze.
According to claim 1,
The mechanical seal, characterized in that the bush is formed with an opening through which the first fluid or the second fluid can move between the inside of the reinforcing bellows and the inside of the stern tube.
According to claim 1,
Mechanical seal, characterized in that the inside of the stern tube is provided with a tube bearing (tube bearing) for supporting the rotor.
According to claim 16,
Mechanical seal, characterized in that the opening is formed in the tube bearing.
According to claim 15,
The mechanical seal, characterized in that the second fluid is generated by the pressure outside the stern tube.
injecting a first fluid into the nipple connector of the graphite ring;
Rotating the metal ring as the rotor rotates; includes,
A reinforced bellows having irregularities is connected to the opposite side of the first sealing face of the graphite ring using a first clamp,
A bush is connected using a second clamp to the opposite side of the reinforcing bellows to which the first clamp is connected,
The method of driving a mechanical seal, characterized in that the bush, the reinforcing bellows, and the graphite ring are located on a side of a stator, and the stator is a stern tube.
According to claim 19,
After the step in which the metal ring rotates as the rotor rotates,
and forming a fluid film between the first sealing face of the graphite ring and the second sealing face of the metal ring.
According to claim 19,
After the step of injecting the first fluid into the nipple fitting of the graphite ring,
and discharging the first fluid through a separation space between the graphite ring and the rotor.
According to claim 19,
After the step of discharging the first fluid through the separation space between the graphite ring and the rotor,
The method of driving a mechanical seal, characterized in that it further comprises; the step of equalizing the pressure of the first fluid and the pressure of the second fluid.
According to claim 19,
A collar is located on the opposite side of the second sealing face of the metal ring,
The method of driving a mechanical seal, characterized in that the metal ring and the collar are located on the side of the rotor.
According to claim 19,
The method of driving a mechanical seal, characterized in that the first fluid is introduced by a sea water pump.
According to claim 19,
The rotor is a shaft of a ship,
An engine is connected to one side of the shaft,
A method of driving a mechanical seal, characterized in that a fan is connected to the other side of the shaft.
According to claim 19,
The method of driving a mechanical seal, characterized in that an opening through which the first fluid or the second fluid can move between the inside of the reinforcing bellows and the inside of the stern tube is formed in the bush.
According to claim 19,
The method of driving a mechanical seal, characterized in that an opening through which the first fluid and the second fluid can move between the inside of the reinforcing bellows and the inside of the stern tube is formed in the bush.
According to claim 19,
A method of driving a mechanical seal, characterized in that a tube bearing having an opening is formed inside the stern tube to support the rotor.
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