KR101524627B1 - hybrid sealing apparatus of turbine - Google Patents

Abstract

The purpose of the present invention is to provide a hybrid sealing apparatus for a turbine capable of effectively sealing the space between a turbine and a rotor inside the turbine, and improving durability and compatibility of a product. The present invention relates to the hybrid sealing apparatus for a turbine comprising: a sealing part mounted on the inner circumference of a casing to seal flow of a fluid flowing out between a casing of a turbine and a rotor rotating inside the casing; a brush part equipped in the center of the sealing part, and including a plurality of bristols whose one end is fixed to the sealing part and the other end is equipped to have a predetermined first distance from the outer circumference of the rotor; and a guardian part whose one end is inserted and combined with a mounting groove part formed in at least one side between the front and the rear of the sealing part and the other end is equipped to have a predetermined second distance which is less than the first distance from the outer circumference of the rotor. Furthermore, the sealing part includes: a plurality of anti-swirl wing parts protruding at a distance away from each other along the front end to have a guidance angle in the opposite direction of flow of the fluid; and a labyrinth tooth part protruding to be stepped along the front of a shock prevention part to cover the front of the bristol, and the rear of a supporting part to support the rear of the bristol. Moreover, the distance between the rotor and the end of the labyrinth tooth part is set to exceed the second distance.

Description

[0001] The present invention relates to a hybrid sealing apparatus for turbine,

The present invention relates to a hybrid sealing apparatus for a turbine, and more particularly, to a hybrid sealing apparatus for a turbine that effectively seals a space between a turbine and a rotating body inside the turbine, but improves the compatibility and durability of the product.

Generally speaking, a turbine is a machine that converts the energy of a fluid such as water, gas or steam into useful mechanical work. That is, a turbomachine is called a turbine in which a plurality of blades are planted along the circumference of the rotor, and the blades are sprayed with steam or gas and rotated at a high speed. In recent years, turbines such as steam turbines and gas turbines have become increasingly large-sized, high-temperature, and high-pressure due to industrialization and technological advancement.

Since the steam leaking from the turbine to the sealing portion between the rotating body and the fixed casing lowers the efficiency of the turbine and increases the fuel cost, it is very important to design a sealing device for reducing steam leakage.

Here, a stainless steel sealing device used in high temperature and high pressure turbines such as steam or gas turbines increases the energy production efficiency of the generator by preventing an increase or leakage of gas, and plays an important role in preventing vibration of the rotating body due to fluid.

FIG. 1 is a sectional view showing a state where a conventional labyrinth type sealing apparatus is mounted on a turbine, and FIG. 2 is a sectional view showing a conventional labyrinth type sealing apparatus.

As shown in Figs. 1 and 2, the conventional labyrinth type sealing apparatus 5 is provided in the outer ring and the inner ring of the diaphragm 3 mounted on the casing 2. [

The labyrinth type sealing device 5 is widely used as a noncontact type annular sealing device of a turbine and generates a throttling process in the fluid flowing in the turbine with a sharp tooth 6 to reduce the leakage flow rate .

That is, the leakage flow rate of the fluid is reduced by the pressure drop effect generated in the process of arranging the teeth 6 in sequence in the stator according to the flow of the fluid and repeating the throttling and expansion of the fluid.

However, when sealing the space by using the conventional labyrinth type sealing device 5, the efficiency loss due to the fluid leaking into the gap between the rotor portion 1 and the tooth 6 is reduced as a whole turbine efficiency loss Of the total.

At this time, the gap between the tooth 6 and the rotor portion 1 can be narrowed to reduce the fluid leakage loss. However, in order to prevent damage to the expensive rotor portion 1, the tooth 6 provided with a small diameter has a narrow gap So that the sealing action is degraded.

Further, due to the deformation of the tooth 6, the gap between the tooth 6 and the rotor portion 1 becomes uniform, and as the fluid flows into the uneven gap, vibration occurs in the rotor portion 1, And there is a problem that the durability is deteriorated.

3 is a side view of a conventional brush sealing apparatus.

3, the conventional brush sealing apparatus includes a brush portion 7 for sealing a gap between the rotor portion 1 as a rotating body and the diaphragm 3 fixed to the casing, and a brush portion 7 for sealing the gap between the rotor portion 1 and the diaphragm 3. [ And a bristle plate (8, 9) supporting the front and rear.

Here, the brush part 7 has a plurality of densely packed bristles, and divides the high-pressure area and the low-pressure area to reduce the flow of the leaked fluid. At this time, since each of the bristles contacts the rotor portion 1 with the lower end portion sealed in the state where the upper end portion is fixed, the leakage of the fluid can be somewhat reduced as compared with the labyrinth type sealing device by sealing the fluid, So that the amount of rotational motion loss is reduced as the outer periphery of the rotor portion 1 is supported.

However, since the conventional bristles 7 are provided so that each bristle is in direct contact with the outer periphery of the rotor portion, there is a problem that abrasion of the bristles is rapidly performed due to friction during high-speed rotation of the rotor portion.

In addition, since bristles are worn differently in each portion of the brush portion due to vibration during rotation of the rotor portion, the amount of leakage of fluid through the worn-out portion is increased, and concentration of the leakage fluid and deflection of the bearing force against the rotor portion There is a problem that the amount of vibration of the rotor portion is increased due to deterioration.

Korean Patent Publication No. 10-2000-0016885

In order to solve the above problems, the present invention provides a hybrid sealing device for a turbine, which effectively seals a space between a turbine and a rotating body inside the turbine, and improves the compatibility and durability of the product.

In order to solve the above problems, the present invention provides a hybrid sealing apparatus for a turbine including a sealing portion mounted on an inner periphery of the casing to seal a flow of fluid flowing between a casing of the turbine and a rotating body rotated inside the casing A brush portion provided at a central portion of the sealing portion and including a plurality of bristles having one end fixed to the sealing portion and the other end having a predetermined first interval from an outer periphery of the rotating body; And a guardian part having one end inserted into and coupled to a mounting groove formed in at least one of a front portion and a rear portion of the sealing portion, the other end of the guardian portion having a predetermined second interval smaller than the first interval from the outer periphery of the rotating body A plurality of anti-swirl vanes protruding from each other along the front end portion so as to have an induction angle in a direction opposite to the flow direction of the fluid; a front portion of the anti-shock portion covering the front of the bristle, Further comprising a labyrinth toothed portion projected in a multi-step along a rear side of a support portion for supporting the rear portion, wherein an end portion of the labyrinth through portion and an interval between the rotating bodies are set to exceed the second interval. Thereby providing a sealing device.

Here, the sealing portion may be made of stainless steel, and the guardian portion may be made of a metal having low hardness.

Preferably, the guardian portion is inserted into the mounting groove portion and caulked to the front and rear edges of the mounting groove portion.

Preferably, an anti-swirl press-in portion is formed on an end surface of the other end portion of the guardian portion so as to connect the front surface and the rear surface in an inclined manner so as to have an induction angle in a direction opposite to the flow of the fluid flowing along the outer periphery of the rotating body.

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Through the above solution, the hybrid sealing apparatus for a turbine of the present invention provides the following effects.

First, since the interval between the other end of the guardian part and the outer periphery of the rotating body is narrower than the interval between the other end of the Bristol and the outer periphery of the rotating body, the guardian part comes into contact with the outer periphery of the rotating body, The direct contact between the bristles and the rotating body is prevented, the abrasion and deformation of the bristles and the deterioration of the sealing performance due to the bristles are minimized, and the durability and sealing performance of the product can be improved.

Second, since the guardian part of the material having the low friction coefficient and the low hardness is disposed closest to the rotating body, the portion protruding from the sealing part such as the labyrinth touching part does not directly contact the rotating body, It can be provided with an economical material having a hardness and a low manufacturing cost, so that the productivity of the product can be improved and the sealing performance of the product can be improved as the structural stability is improved.

Third, an anti-swirl press-in portion having an induction angle in the direction opposite to the flow of the fluid is formed on the end surface on the other end side of the guardian portion, and the fluid that is rotated and vibrated along the rotating direction of the rotating body is rotated in the axial direction It is possible to minimize the resonance phenomenon through the swirl flow and the swirl flow of the fluid due to the switching of the flow direction, and the safety of the product can be improved by preventing the damage of the rotor due to resonance and the overload of the turbine.

1 is a cross-sectional view showing a state where a conventional labyrinth type sealing device is mounted on a turbine.
2 is a side sectional view showing a conventional labyrinth type sealing apparatus.
3 is a side cross-sectional view of a conventional brush seal device;
4 is a cross-sectional view showing a state in which a hybrid sealing apparatus for a turbine according to an embodiment of the present invention is mounted on a turbine.
5 is a side view of a hybrid sealing apparatus for a turbine according to an embodiment of the present invention.
6 is a front view of a hybrid sealing apparatus for a turbine according to an embodiment of the present invention;
7 is a rear view of a hybrid sealing apparatus for a turbine according to an embodiment of the present invention.

Hereinafter, a hybrid sealing apparatus for a turbine according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4 is a cross-sectional view illustrating a state in which a hybrid sealing apparatus for a turbine according to an embodiment of the present invention is mounted on a turbine.

4, the hybrid sealing apparatus 100 for a turbine according to an embodiment of the present invention is mounted to seal the flow of the fluid f leaking between the casing 20 of the turbine and the rotating body 10 .

Here, it is preferable that the rotor 10 includes a rotor portion having a plurality of blades 27a coupled to the outer periphery thereof. At this time, the brush seal apparatus 100 may be provided in a ring shape and disposed between the outer periphery of the rotating body 10 and the inner periphery of the casing 20 along the circumferential direction.

The term sealing the flow of the fluid f means to divide the high pressure area in front of the blade of the rotating body 10 and the low pressure area in the rear of the blade so that the rotation of the rotating body 10 can be smoothly performed, It is preferable to understand that the pressure is reduced and then flowed to the low-pressure region.

Of course, the sealing device 100 may be disposed between the casing 20 and the end of the blade 27a, between the casing 20 and the cylindrical body of the swinging rotor portion to reduce leakage of fluid, And can be installed at any place where sealing is required between the rotating body 20 rotated inside the casing and the casing 10 fixed thereto.

4, the fluid f such as steam or gas introduced into the casing 20 passes through the partition 27 of the diaphragm fixed to the casing 20, Thereby rotating the blade 27a. The fluid (f) is discharged to the outside through the step of rotating the next blade according to the guidance of the partition (27).

Through this process, the generator receives the rotational force through the rotor portion rotated together with each of the blades 27a, and converts the rotational force into electrical energy to generate electric power.

FIG. 5 is a side view showing a hybrid sealing apparatus for a turbine according to an embodiment of the present invention, FIG. 6 is a front view showing a hybrid sealing apparatus for a turbine according to an embodiment of the present invention, and FIG. 1 is a rear view of a hybrid sealing device for a turbine according to an example.

5 to 7, the hybrid sealing apparatus 100 for a turbine includes a sealing part 110, a brush part 130, and a guardian part 120. [

The sealing portion 110 is coupled to the inner circumference of the casing 20 to seal the flow of fluid flowing between the casing 20 of the turbine and the rotating body 10 rotated inside the casing 20 .

In detail, the sealing portion 110 is formed in a ring shape so that it can seal between the outer circumference of the rotating body 10 and the inner circumference of the casing 20 in the circumferential direction.

At this time, the sealing part 110 may be provided in a complete ring shape, but may be formed to be divided at a predetermined angle for convenience of mounting. When assembled, the sealing part 110 is formed into a complete ring shape, It is possible to cover the space between the outer circumference of the housing 10.

A coupling groove 21 for mounting the sealing portion 110 is formed on the inner circumference of the casing 20 and a coupling groove 21 corresponding to the coupling groove 21 is formed on the sealing portion 110. [ The protrusions 111 may be formed.

At this time, it is preferable that an elastic member 140 is provided between the coupling groove 21 and the coupling protrusion 111, and the coupling protrusion 111 of the sealing portion 110 is formed by the elastic member 140 And can be elastically supported radially inward.

Accordingly, the guardian part 120 provided on the sealing part 110 is kept adjacent to the rotary body 10 by the urging force of the elastic member 140, The sealing portion 110 can be moved radially outward by applying a force greater than a pressing force of the elastic member 140 in contact with the guardian portion 120 due to expansion or the like.

Therefore, it is possible to prevent the guardian part 120 from being excessively brought into contact with the surface of the rotating body 10 rotating at a high speed, minimizing the wear of the guardian part 120, The rotational loss of the motor 10 can be minimized.

The brush part 130 is provided at the center of the sealing part 110 and the one end part 131b is fixed to the sealing part 110 while the other end part 131a is fixed to the outer circumference of the rotating body 10. [ And a plurality of bristles 131 provided so as to have a predetermined first interval A from the bristles 131.

Here, each of the bristles 131 may be formed of a flexible material having elasticity and heat resistance, and may be closely packed with adjacent bristles, and one end 131b of each of the bristles 131 may be an electron beam It can be fixed by welding (electric beam welding, EBW) or by a bonding material stable to high temperature.

Each of the bristles 131 may be directly fixed to a brush groove 115 formed at a central portion of the sealing portion 110 and may be fixed to a separate member such as a brush plate 132, 132 are fixed to the brush groove 115 as shown in FIG.

The ends of the bridges 131 of the bristles 131 are connected to the outer circumference of the rotor 10 and the outer circumference of the bridges 131, And a length having a predetermined first interval (A).

One end of the guard portion 120 is inserted into and coupled to the mounting recess 114 formed at at least one of the front portion and the rear portion of the sealing portion 110 and the other end is inserted into the outer circumference of the rotator 10 (B) less than the first interval (A).

The mounting groove 114 may be spaced apart from the brush groove 115 by a predetermined distance and may be provided between the mounting groove 114 and the brush groove 115 in multiple stages.

The mounting groove 114 may be provided only in one of the front portion and the rear portion of the sealing portion 110 and the gap between the sealing portion 110 and the rotating body 10 may be stably maintained It is preferable that they are provided on both sides of the front and rear sides of the sealing part 110. [

At this time, in the guardian part 120, when the sealing part 110 is mounted on the casing 20, the other end of the guardian part 120 is spaced apart from the outer circumference of the rotating body 10 by a predetermined second gap (B).

That is, in a state where the sealing portion 110 is mounted on the casing 20, the other end of the guardian portion 120 is disposed adjacent to the outer periphery of the rotating body than the other ends of the bristles 131 .

The guardian part 120 contacts the outer circumference of the rotary body 10 when the rotary body 10 vibrates or thermally expands to support the rotary body 10 so that the vibration of the rotary body 10 The eccentric motion of the rotating body 10 due to the vibration can be reduced and the loss of rotational force can be reduced.

The guardian part 120 first comes into contact with the rotary body 10 more than the respective bristles 131 when the rotary body 10 vibrates or thermally expands and the sealing part 110 is moved in the radial direction And is moved outwardly.

Accordingly, the other end of each of the bristles 131 can be prevented from being in direct contact with the rotating body 10, and the abrasion damage or the plastic deformation in the rotational direction of each of the bristles 131 can be minimized The durability of the product can be improved.

In addition, sealing performance can be prevented from deteriorating due to abrasion and deformation of the bristles 131, and the sealing performance of the product can be improved.

5 to 7, the sealing part 110 may further include an anti-swirl wing part 112 and a labyrinth sealing part 113.

The anti-swirl wing portions 112 may be provided along the circumference of the sealing portion 110 so as to have an induction angle in a direction opposite to the flow of the fluid, and may be spaced apart from one another in the circumferential direction.

At this time, the anti-swirl vanes 112 are provided in parallel with each other, and a fluid movement passage g corresponding to the induction angle can be formed between the anti-swirl vanes 112.

Specifically, the fluid is rotated in the same direction as the rotating body 10 in response to the rotation of the rotating body 10 when the fluid flows backward from the front of the sealing apparatus 100, The direction of rotation of the rotary body 10 is opposite to the direction of rotation of the rotary body 10.

The fluid flowing from the front to the rear of the sealing portion 110 is vibrated by the swirl phenomenon by rotating along the rotating direction of the rotating body. The vibration of the fluid having the same rotating direction as the rotating body is transmitted to the rotating body 10) and a resonance phenomenon.

At this time, the vibration of the rotating body 10 is increased due to the resonance phenomenon, and the rotating body 10 is damaged by the superimposed vibration or the mechanical load of the turbine is increased due to the increase of the eccentric amount of the rotating body 10.

The fluid f passes through a fluid movement passage g formed at an induction angle opposite to the rotation direction of the rotator 10 so that the flow direction of the fluid f is changed in the direction of rotation . ≪ / RTI >

Accordingly, the resonance phenomenon between the fluid and the rotating body 10 can be minimized, and damage to the rotating body due to the resonance phenomenon can be prevented.

The brush 130 may further include a shock preventing part 132a covering the front of the bristle 131 and a supporting part 132b supporting the back of the bristle 131 . The shock preventing part 132a and the support part 132b may be integrally formed with the brush plate 132 to which the bristles 131 are coupled.

In detail, the shock preventing portion 132a covers the front surface of the bristles 131 to prevent a high-pressure fluid f flowing at a high speed from being in direct contact with the bristles 131, (f) its own speed / pressure and the abrasion damage of the bristles due to foreign matter in the fluid (f).

The support portion 132b supports the rear surface of the bristles 131 and supports the bristles 131 along the flow direction of the fluid f when the fluid f passes between the bristles 131 131 can be prevented from being bent backward.

That is, even if a high-pressure fluid presses the bristles 131, the ends of the bristles 131 do not move away from the outer circumference of the rotary body 10, Can be improved.

Meanwhile, it is preferable that the labyrinth penetration part 113 is formed in a multi-step shape in front of the shock-preventing part 132a and behind the support part 132b.

That is, the labyrinth brush part 113 is disposed between the space between the anti-swirl blade part 112 and the front mounting groove part 114, between the front mounting groove part 114 and the brush groove 115, The space between the rear mounting groove part 115 and the rear mounting groove part, and the rear space of the rear mounting groove part.

In detail, each end of the labyrinth penetration part 113 is formed in a ring shape and protrudes radially inward along the surface facing the rotating body 10 at the sealing part 110, Direction along the flow direction of the fluid.

At this time, the fluid f flowing along the outer periphery of the rotating body 10 is compressed in a narrow space between the ends of the respective labyrinth touching portions 113 and the rotating body 10, 113), and the pressure is reduced through the throttling action.

The gap C1 between the end portion of the labyrinth penetration portion 113 and the rotator 10 is larger than the gap between the other end portion of the guardian portion 120 and the rotator 10, It is preferable to set it to exceed the interval B.

In detail, the guardian part 120 is first brought into contact with the rotary body 10 more than the respective labyrinth touching parts 113 during vibration or thermal expansion of the rotary body 10, And is elastically moved radially outward.

The portion of the sealing portion 110 protruding from the sealing portion 110 such as the labyrinth penetration portion 113 to the rotating body 10 is not in direct contact with the rotating body 10, But is not limited to a low hardness so as to be abraded with a line.

That is, since the guardian part 120 of the material having the low friction coefficient and the low hardness is provided so as to be closest to the rotating body 10, the part protruding from the sealing part such as the labyrinth touching part does not come into direct contact with the rotating body, It can be provided with an economical material having high hardness and low manufacturing cost irrespective of the whole material, and productivity of the product can be improved.

Here, the term "low hardness" means a hardness lower than the hardness of the material constituting the rotating body 10, and it is understood that the guardian part 120 is provided as a material having lower hardness than the rotating body 10 desirable.

In addition, unlike the conventional labyrinth thread portion having a low hardness material, the labyrinth thread portion 113 provided with a high-hardness material can be stably retained without being bent easily even when exposed to a high-pressure fluid Therefore, the sealing performance of the product can be improved.

Here, the labyrinth-through portion formed in the sealing portion 110 and the sealing portion 110 is preferably integrally formed by centrifugal casting.

Accordingly, the sealing portion 110 provided in a ring shape or a divided ring shape can be cast accurately in accordance with the inner shape of the casing 10, and the end portion or the end portion of the labyrinth touch portion 113 The gap between the surface of the sealing part 110 exposed through the gap and the outer circumference of the rotating body 10 can be cast in a uniform and precise shape according to the designed gap.

Here, the sealing part 110 is made of stainless steel, and the guardian part 120 is preferably made of a metal having low hardness and friction coefficient.

That is, since the portion of the sealing portion 110 protruding toward the rotating body is not in direct contact with the rotating body 10 due to the height of the guard ring 120 protruding from the labyrinth touching portion 113, 10, it is not limited to a material having a low hardness and can be provided with a material having high hardness and corrosion resistance.

Accordingly, since the labyrinth touching part 113 protruding from the sealing part 110 to the rotating body 10 is not easily deformed even when pressurized by the high-pressure fluid, deformation of the penetrating part 113 is minimized, Can be improved.

In addition, since the deformation is minimized, the gap between the labyrinth penetration portion 113 and the rotating body can be uniformly maintained, so that vibration of the rotating body due to biased fluid passing through the outer circumference of the rotating body 10 can be minimized, Can be improved.

The labyrinth toothed portion 113 made of a stainless steel material, unlike the conventional labyrinth toothed portion, is made of a low-hardness material, and when the gap between the labyrinth toothed portion 113 and the rotating body is narrow, The gap between the end of the labyrinth penetration portion 113 and the rotary body 10 can be minimized within a range exceeding the second gap.

Accordingly, it is possible to minimize the leakage of the fluid through the clearance between the penetration portion 113 and the rotating body 10 and the efficiency loss of the turbine.

The guardian part 120 may be formed of a brass, copper or copper-based nickel alloy having a low friction coefficient and a low hardness.

Accordingly, even when the rotating body 10 is brought into contact with the rotating body 10, the guardian portion 120 is worn without line wear, thereby making it possible to safely protect the rotating body 10, which is an expensive precision component, The contact resistance with the rotating body 10 is minimized by the coefficient, thereby preventing the loss of the rotational force and improving the efficiency of the product.

The guardian part 120 is inserted into the mounting groove part 114 and is coupled to the caulking part 114a by pressing the front and rear edges of the mounting groove part 114.

In detail, the guardian part 120 is manufactured as a separate part from the sealing part 110. When the part to which the sealing part 110 is to be mounted is determined, when the one end part is inserted into the mounting groove part 114, Can be fixed by pushing the front and rear rims of the mounting groove 114 in a state where the other end is protruded with a height corresponding to the interval between the rotor 110 and the rotating body 10.

Accordingly, if only the depth of insertion of the guardian part 120 of the same size into the inside of the mounting groove 114 is adjusted, it is possible to mount the guardian part 120 with a length suitable for each part of the turbine, so that the compatibility of the product can be improved.

Further, the edge of the mounting groove 114 protruding through the simple process of pressing both sides of the mounting groove 114 is pressed into the surface of the guardian part 120, and the guardian part 120 is firmly fixed The coupling process of the guardian part 120 which is the most protruded part from the surface of the sealing part 110 can be performed by the casting process of the anti-swirl wing part 112, the labyrinth touching part 113, Bonding process and the like, so that the overall process difficulty can be lowered and the productivity of the product can be improved.

On the other end side of the front side guardian part 120, an anti-depressed front and rear surfaces are provided so as to have an induction angle in the direction opposite to the flow of the fluid flowing along the outer periphery of the rotating body 10, The swirl press-in portion 121 is preferably formed.

Here, the term "other end surface" means that the surface of the guardian 120 is opposed to the outer circumferential surface of the rotary body 10, Direction, and the rear surface may mean the opposite side of the front surface.

At this time, it is preferable that the anti-swallow press-in portions 121 are formed in a plurality of spaced apart from each other in the circumferential direction on the end surface of the other end portion of the guardian portion 120.

In detail, the high-pressure fluid in the front side of the sealing device 100 is rotated and vibrated in the same direction as the rotating body 10 in accordance with the rotation of the rotating body 10, Through the fluid transfer passage (g) between the rotor (10) and the rotor (10).

That is, the fluid flows to the side of the labyrinthine tooth portion 113 in a state deviating from the flow direction which is the same as the direction of rotation of the rotating body 10, which may cause the resonance phenomenon, and the fluid passes through the guardian portion 120, (130) and the like.

At this time, another part of the high-pressure fluid on the front side of the sealing apparatus 100 is directly passed through the gap between the anti-swirl vane part 112 and the rotating body 10 without passing through the fluid movement path g. (113) or guardian (120).

Here, the fluid not passing through the fluid transfer passage (g) may rotate and vibrate in the same direction as the rotating body (10) to cause a resonance phenomenon.

At this time, the fluid not passing through the fluid transfer passage (g) flows between the other end of the guardian part (120) and the rotating body (10) Can be switched to a flow in a different direction.

As the fluid to be rotated and vibrated in the rotating direction of the rotating body is straightened in multiple stages by the anti-swirl vane part 112 and the anti-swirl press-in part 121, the resonance phenomenon due to the swirl flow of the fluid can be minimized And the turbine can be stably driven without damaging the rotating body 10 due to the resonance phenomenon.

Also, since the contact area between the guardian part 120 and the rotary body 10 can be minimized by the anti-swirl press-in part 121, the loss of frictional resistance and rotational force can be reduced.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

1: rotor part 2,20: casing
3: Diaphragm 5: Labyrinth type sealing device
6: tooth 7,130: brush part
8,9: Bristol Plate 10: Rotor Whole
21: coupling groove 27: partition
27a: Blade 100: Hybrid sealing device
110: sealing part 111: engaging projection
112: Anti-swirl wing part 113: Labyrinth tweezers
114: mounting groove 115: brush groove
120: Guardian part 121: Anti-swirl press-in part
131: bristle 132: brush plate
132a: shock preventing portion 132b:
140: elastic member

Claims (5)

A hybrid sealing device for a turbine, comprising: a sealing portion mounted on an inner periphery of the casing to seal a flow of fluid flowing between a casing of the turbine and a rotating body rotated inside the casing,
A brush portion provided at a central portion of the sealing portion and including a plurality of bristles having one end fixed to the sealing portion and the other end having a predetermined first interval from an outer periphery of the rotating body; And
And a guarding part having one end inserted into and coupled to a mounting groove formed in at least one of a front portion and a rear portion of the sealing portion so that the other end has a predetermined second spacing less than the first spacing from the outer periphery of the rotating body However,
The sealing portion includes a plurality of anti-swirl wing portions projected to be spaced apart from each other along the front end portion so as to have an induction angle in a direction opposite to the flow direction of the fluid, a front portion of the shock- Further comprising a labyrinth through portion projecting in a multi-stage along the back of the supporting portion,
Wherein an end of the labyrinth through portion and an interval between the rotating bodies are set to exceed the second gap. The method according to claim 1,
Wherein the sealing portion is made of a stainless steel material, and the guardian portion is made of a metal material having a low hardness. The method according to claim 1,
Wherein the guardian portion is inserted into the mounting groove portion, and is caulked when the front and rear edges of the mounting groove portion are pressed. The method according to claim 1,
And an anti-swirl press-in portion formed to be inclined to connect the front surface and the rear surface so as to have an induction angle in the direction opposite to the flow of the fluid flowing along the outer periphery of the rotating body, is formed on the end surface of the other end portion of the guardian portion. Sealing device.
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