KR20170090742A - Flexible sealing assembly includes plurality holder ring split body comprising brush - Google Patents

Flexible sealing assembly includes plurality holder ring split body comprising brush Download PDF

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Publication number
KR20170090742A
KR20170090742A KR1020160011458A KR20160011458A KR20170090742A KR 20170090742 A KR20170090742 A KR 20170090742A KR 1020160011458 A KR1020160011458 A KR 1020160011458A KR 20160011458 A KR20160011458 A KR 20160011458A KR 20170090742 A KR20170090742 A KR 20170090742A
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KR
South Korea
Prior art keywords
holder ring
rotor
rti
wedge
housing
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KR1020160011458A
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Korean (ko)
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KR101884704B1 (en
Inventor
신언탁
Original Assignee
두산중공업 주식회사
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Priority to KR1020160011458A priority Critical patent/KR101884704B1/en
Publication of KR20170090742A publication Critical patent/KR20170090742A/en
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Publication of KR101884704B1 publication Critical patent/KR101884704B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/28—Arrangement of seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/188—Split assemblies

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The present invention relates to a flexible sealing assembly comprising a plurality of holder ring dividers provided with brushes and more particularly to a flexible sealing assembly for a turbine provided between a rotor and a housing surrounding the rotor, The present invention relates to a flexible sealing assembly having a body and a brush to maximize a sealing effect.
There is an effect that the plurality of movable holder divided bodies always tightly come into tight contact with the rotor and perform a sealing function even if wear of the sealing member occurs due to the friction between the brush-shaped sealing member and the rotor.

Description

A flexible sealing assembly comprising a plurality of holder ring seats with brushes. {Flexible sealing assembly includes multiple holder ring split body with brush}

The present invention relates to a flexible sealing assembly comprising a plurality of holder ring dividers provided with brushes and more particularly to a flexible sealing assembly provided between a rotor and a housing surrounding the rotor, To a flexible sealing assembly that maximizes the sealing effect by providing a brush.

Generally, an axial turbine such as a steam turbine or a gas turbine has a fixed nozzle and a rotor. The nozzle receives the working fluid such as steam from the upstream side of the high pressure and expands the working fluid on the downstream side of the low pressure to convert the heat energy into mechanical energy. The rotor is rotated at high speed by the mechanical energy to generate rotational energy, and the generator is driven by its rotational energy to generate electric power.

In the axial flow turbine stage, when the working fluid flows through the flow path of the stage and bypasses the flow path between the nozzle and the moving blade, the working fluid flows out through the gap between the rotating portion and the fixed portion to reduce the efficiency of the axial flow turbine . The outflow loss caused by the outflow of the working fluid through the gap between the rotor and the inner circumference of the inner ring of the nozzle diaphragm is one cause for reducing the efficiency of the axial turbine.

Conventionally, various types of fixed sealing structures have been introduced to reduce the outflow loss caused by the outflow of the working fluid through the gap between the rotor and the inner circumference of the inner ring of the nozzle diaphragm.

However, due to the nature of the sealing member which directly contacts the rotating rotor and performs the sealing function, the wear of the sealing member has been a problem in the sealing of the rotor portion.

Korea Patent No. KR 1195543 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a flexible sealing assembly for a turbine provided between a rotor and a housing surrounding the rotor, To provide a flexible sealing assembly.

This is because, compared with various types of fixed sealing structures, in order to reduce the outflow loss caused by the outflow of working fluid through the gap between the inner circumference of the inner ring of the inner diaphragm and the rotor of the prior art, There is provided a structure in which the brush and the brush attached to the rotor and the holder ring member can always contact with each other.

In order to achieve the above object, according to an embodiment of the present invention, there is provided a flexible sealing assembly for a turbine provided between a rotor and a housing surrounding the rotor, the flexible sealing assembly comprising: And a first brush portion having one end fixed to the holder ring and the other end contacting the rotor to seal the space between the holder ring and the rotor.

Further, it is preferable that the holder rings each have the same size and are divided into at least two holder rings.

It is also possible to further include wedge-shaped gaps each provided in a gap between the holder ring divided bodies each having the same size and having at least two or more same sizes.

In addition, the wedge-shaped gaps may have a ring shape cut at a predetermined angle of circumferential angle, and the length of the inner circumferential side arc is shorter than the length of the outer circumferential side arc, and when the holder ring divided bodies are close to each other, , And when the holder ring divided bodies are moved away from each other, they are preferably led into the inner peripheral side.

The wedge-shaped gap body may have a second brush portion contacting the rotor and performing a sealing function.

The wedge-shaped gap body includes projections provided on both side surfaces of the wedge-shaped gap body in contact with the holder ring divided body. The stationary sealing divided body has the fixed sealing division And a groove portion provided on the contact surface.

The holder ring dividing members are provided at respective gaps between the holder ring dividing members each having the same size and having at least two or more same sizes, and include at least one bending section. When the holder ring dividing members are spaced apart or close to each other, It is possible to further include a snap member that serves as a stopper.

Further, it is preferable that a spring member is provided between the housing and the holder ring, one side of which is in contact with the inner side surface of the housing and the other side is in contact with the holder ring and is installed toward the center of the circular holder ring Do.

In addition, it is possible to further comprise an arcuate spring damper provided in each clearance between the stationary sealing division bodies each having the same size and having at least two or more equal sizes divided.

The present invention provides a flexible sealing assembly for a turbine provided between a rotor and a housing surrounding the rotor, the flexible sealing assembly having a plurality of movable holder dividers and brushes, thereby maximizing the sealing effect.

There is an effect that the plurality of movable holder divided bodies always tightly come into tight contact with the rotor and perform a sealing function even if wear of the sealing member occurs due to the friction between the brush-shaped sealing member and the rotor.

1 is a sectional view of a flexible sealing assembly provided with a holder ring division member and a rotor according to an embodiment of the present invention.
2 is a cross-sectional view of a flexible sealing assembly having a housing and a holder ring divider to illustrate an embodiment of the present invention.
3 is a front view of a holder ring divided body and a spring showing one embodiment of the present invention.
4 is a partially enlarged view of a holder ring divided body and a shim member showing one embodiment of the present invention.
5 is a front view of a holder ring divided body and a spring showing one embodiment of the present invention.
6 is a perspective view of a holder ring divided body and a wedge-shaped gap body according to an embodiment of the present invention.
7 is a front view of a wedge-shaped gap member and a second brush unit according to an embodiment of the present invention.
8 is a perspective view of a holder ring dividing member and an arch spring damper showing one embodiment of the present invention.
9 is a front view of an arch spring damper showing an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

1 is a sectional view of a flexible sealing assembly provided with a holder ring division member and a rotor according to an embodiment of the present invention.

1, a flexible sealing assembly 1 for a turbine is provided between a rotor 2 and a housing 3 surrounding the rotor 2. The flexible sealing assembly 1 comprises a housing 3, It is possible to provide the holder ring 11 in the form of a ring.

The holder ring 11, which is provided in the form of a ring composed of a plurality of divided bodies inside the housing 3, has one end fixed to the inside of the holder ring, a first brush portion 111 extended from the center of the holder ring May be provided.

The first brush part 111 seals a space provided between the rotor 2 and the housing 3 surrounding the rotor.

More specifically, the holder ring, which is provided in the form of a ring composed of a plurality of divided bodies inside the housing, can be fixed to the holder ring at one end, and the other end is in contact with the rotor, It is possible to provide a flexible sealing assembly 1 for a turbine that includes a first brush portion 111 that seals a turbine.

Further, the holder rings 11 are each of the same size and can be divided into at least two or more holding ring dividers 112.

2 is a cross-sectional view of a flexible sealing assembly having a housing and a holder ring divider to illustrate an embodiment of the present invention.

3 is a front view of a holder ring divided body and a spring showing one embodiment of the present invention.

5 is a front view of a holder ring divided body and a spring showing one embodiment of the present invention.

2, 3 and 5, one end of the opposite end contacts the inner side surface of the housing 3 and the other end contacts the holder ring 11 between the housing 3 and the holder ring 11. [ And a spring member provided in the gap 16 between the circular holder ring 11 and the housing 3.

More specifically, it is possible to provide a housing 3 that surrounds the rotor 2 from outside and performs a role of fixing the holder ring divided body 112 including the sealing member.

The housing 3 may be provided in a donut shape provided with a space inside and a ring shaped holder ring divided body 112 may be provided in a space provided inside the housing 3 to be partially fixed.

The structure in which the ring-shaped holder ring divided body 112 is provided and partially fixed in the space provided inside the housing 3 is a structure in which the fluidity between the inner wall of the housing 3 and the ring- It is preferable that a clearance 16 should be provided.

In addition, it is possible to provide a spring member, which is a means for achieving an object of the present invention, in the space of the clearance 16.

The spring member is preferably comprised of a plate spring member 14, a curved spring member 14 'and a spring spring member 14'.

The above-mentioned spring member may be formed in such a manner that the holder ring divided body is held in contact with the holder ring divided body so that the brush attached to the rotor and the holder ring divided body can always come into contact while maintaining fluidity between the inner wall of the housing and the ring- It is possible to perform the function of pushing from the inner wall of the housing toward the central axis of the rotor.

Specifically, in the case of the plate spring member 14 and the curved spring member 14 ', one end is inserted into a groove provided outside the holder ring divided body 112 and the other end is provided on the inner wall of the housing, It is preferable to push the holder ring divided body from the inner wall of the housing toward the central axis of the rotor so that the rotor and the brush part attached to the holder ring divided body can always come into contact with each other by the tension of itself .

In addition, in the case of the spring spring member 14 '', by virtue of the elasticity of the spring itself, the holder ring member 14 '' can be made to contact the first brush portion 111 attached to the rotor and the holder ring member at all times It is preferable to perform the function of pushing from the inner wall of the housing toward the central axis of the rotor.

The specific spring spring member 14 "is installed such that a part of the upper side of the spring spring member 14 " is inserted into the housing 3 capable of being divided into two or more pieces for fixing the holder ring divided body 112 It is possible to provide a through hole through the housing 3 which can be divided into two or more pieces on the side surface of the second insertion hole.

In this case, the position of the through hole of the housing 3 is made to coincide with the first insertion hole provided so that a part of the lower portion of the spring spring member 14 "

Thereafter, a spring is inserted into the through hole, and the housing 3 is rotated at a predetermined angle, and a part of the upper part of the spring spring member 14 "is inserted into the second insertion hole provided in the housing 3 to be fixed It is possible to do.

4 is a partially enlarged view of a holder ring divided body and a shim member showing one embodiment of the present invention.

4 (a) and 4 (b), it is necessary to confirm a fitting member provided at each clearance between the holder ring divided bodies 112 having the same size and having at least two or more equal sizes to be divided It is possible.

The shim member includes at least one bent portion 131 and is capable of serving as a guide when the holder ring divided bodies 112 are spaced apart from or close to each other.

More specifically, FIG. 4 (a) shows a state in which a gap between the holder ring divided bodies 112 having at least two identical sizes is open. In this case, It is possible to confirm that the fitting members provided in the respective gaps connect the two holder ring bodies 112.

(b) shows a state in which a gap between the holder ring divided bodies 112 having at least two identical sizes is narrowed. In this case, It is possible to confirm that the two holder dividing members 112 are connected to each other along the guide grooves 112 and are correctly guided to form one arc.

The above-mentioned shim member is not necessarily limited to the L-shaped structure as shown in the drawing, and two holder dividing members 112 are connected along the shim member provided in the clearance between the holder ring dividing members 112 , And it can be seen as a shim member of the present invention if it is a structure that can be properly guided to form a single arc.

6 is a perspective view of a holder ring divided body and a wedge-shaped gap body according to an embodiment of the present invention.

7 is a front view of a wedge-shaped gap member and a second brush unit according to an embodiment of the present invention.

6 and 7, wedge-shaped gaps 113 are provided in the respective gaps between the holder ring divided bodies 112 having the same size and having at least two or more identical sizes It is possible.

In this case, the wedge-shaped gap body 113 has a ring shape cut at a circumferential angle of a certain acute angle, and the length of the inner circumferential side arc is shorter than the length of the outer circumferential side arc, When the holder ring divided bodies 112 are separated from each other, it is possible to enter the inner peripheral side.

The wedge-shaped gap body 113 is preferably provided at its lower end with a second brush portion 113b that contacts the rotor 2 and performs a sealing function.

When the wedge-shaped gap body 113 is provided between the holder ring divided bodies 112, the second brush unit is connected to the first brush unit, and the first brush unit and the second brush unit are connected to each other It is possible to perform sealing.

Also, in case the second brush portion is worn out due to friction with the rotor and the sealing function is deteriorated, the wedge-shaped gap body 113 has a ring shape cut at a predetermined acute angle, The length of the inner circumferential side arc is shorter than the length of the outer circumferential side arc so that when the holder ring divided bodies 112 are close to each other, they are pushed to the outer circumferential side and when the holder ring divided bodies 112 are separated from each other, It is possible.

This is because the wedge-shaped gap body 113 is pushed outward or inward to the outer periphery side by the self-tension of a plurality of spring members provided in the gap between the outer wall of the holder ring partition member 112 and the inner wall side of the housing It is possible.

The wedge-shaped gap body 113 includes protruding portions 113a provided on both side surfaces of the wedge-shaped gap body 113 in contact with the holder ring divided body 112, and the holder ring divided body 112 may include a groove portion 112a provided on a contact surface of the holder ring divided body 112 in contact with the wedge-shaped gap body 113. [

The wedge-shaped gaps 113 are pushed toward the outer circumference when the holder ring divided bodies 112 are close to each other, and when the holder ring divided bodies 112 are separated from each other, It is preferable that the wedge-shaped gap body 113 includes a protrusion that can guide the wedge-shaped gap body 113 itself, and the groove portion 112a may be provided on the contact surface of the holder ring divided body 112 corresponding thereto.

The shape of the projecting portion and the groove portion is not necessarily limited to a rectangular shape. The wedge-shaped gap body 113 is pushed outwardly when the holder ring divided bodies 112 are close to each other, And a shape of the slide structure to be able to enter the inner circumferential side when the grooves 112 are separated from each other.

8 is a perspective view of a holder ring dividing member and an arch spring damper showing one embodiment of the present invention.

9 is a front view of an arch spring damper showing an embodiment of the present invention.

8 and 9, the flexible sealing assembly includes an arcuate spring damper 15 provided at each clearance between the holder ring divided bodies 112 having the same size and having at least two or more equal sizes to be divided, As shown in FIG.

Specifically, the arcuate spring damper 15 performs a function similar to that of the wedge-shaped gap element, and can be selectively installed.

Therefore, the arch-shaped spring damper 15 is provided in each clearance between the holder ring divided bodies 112 to absorb the impact received by each of the holder ring divided bodies 112 and has a constant tension, It is possible to guide the process of narrowing the space between the body 112 and the body 112.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: Flexible sealing assembly
2: Rotor
3: Housing
11: Holder ring
13:
14: Plate-shaped spring member
14 ': Curved spring member
14 ": spring spring member
15: Spring damper
16: Clearance
111: first brush portion
112:
112a:
113: wedge type gap element
113a:
113b: second brush portion
131:

Claims (9)

A flexible sealing assembly for a turbine provided between a rotor and a housing surrounding the rotor,
A holder ring (11) provided in the form of a ring made up of a plurality of divided bodies (112) inside the housing (3); And
A first brush portion 111 having one end fixed to the holder ring 11 and the other end contacting with the rotor 2 to seal a space between the holder ring 11 and the rotor 2;
(1) for a turbine.
The method according to claim 1,
The holder ring (11)
At least two holding ring members (112) having the same size, respectively;
(1). ≪ RTI ID = 0.0 > 1 < / RTI >
3. The method of claim 2,
A wedge-shaped gap body 113 provided at a gap between the holder ring divided bodies 112 having the same size and having at least two or more equal sizes to be divided;
(1). ≪ / RTI >
The method of claim 3,
The wedge-shaped gaps (113)
And the length of the inner circumferential side arc is shorter than the length of the outer circumferential side arc so that the holder ring divided bodies 112 are pushed toward the outer circumferential side when the holder ring divided bodies 112 are close to each other, (112) are spaced apart from one another and are drawn into the inner periphery side.
The method of claim 3,
A second brush portion 113b provided at a lower end of the wedge-shaped gap body 113 to contact the rotor 2 and perform a sealing function;
(1). ≪ RTI ID = 0.0 > 1 < / RTI >
The method of claim 3,
The wedge-shaped gaps (113)
A protrusion 113a provided on both side surfaces of the wedge-shaped gap body 113 in contact with the holder ring divided body 112; / RTI >
The holder ring divided body (112) has a groove portion (112a) provided on a contact surface of the holder ring divided body (112) in contact with the wedge shaped gap body (113);
(1). ≪ / RTI >
3. The method of claim 2,
The holder ring division body (112) includes at least one bending section (131) provided in each of the gaps between the holder ring division bodies (112) having the same size and having at least two or more same sizes, (13) serving as a guide when they are spaced apart from or close to each other;
(1). ≪ / RTI >
3. The method of claim 2,
Between the housing 3 and the holder ring 11,
The other end of which is in contact with the inner surface of the housing 3 and the other of which is in contact with the holder ring 11 and which is provided in the gap 16 between the circular holder ring 11 and the housing 3, ;
(1). ≪ / RTI >
3. The method of claim 2,
An arcuate spring damper (15) provided at each clearance between the holder ring divided bodies (112) having the same size and having at least two or more equal sizes divided;
(1). ≪ / RTI >
KR1020160011458A 2016-01-29 2016-01-29 Flexible sealing assembly includes plurality holder ring split body comprising brush KR101884704B1 (en)

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Application Number Priority Date Filing Date Title
KR1020160011458A KR101884704B1 (en) 2016-01-29 2016-01-29 Flexible sealing assembly includes plurality holder ring split body comprising brush

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KR20170090742A true KR20170090742A (en) 2017-08-08
KR101884704B1 KR101884704B1 (en) 2018-08-02

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004068965A (en) * 2002-08-08 2004-03-04 Toshiba Corp Contact type sealing device
KR200389039Y1 (en) * 2005-04-07 2005-07-07 한국중부발전(주) Retractable Packing Ring for Steam Turbine
KR101195543B1 (en) 2005-02-07 2012-10-29 보르그워너 인코퍼레이티드 Turbomachine and rotor-shaft seal
KR101572907B1 (en) * 2015-05-27 2015-12-11 조정봉 Flexible packing ring for turbine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004068965A (en) * 2002-08-08 2004-03-04 Toshiba Corp Contact type sealing device
KR101195543B1 (en) 2005-02-07 2012-10-29 보르그워너 인코퍼레이티드 Turbomachine and rotor-shaft seal
KR200389039Y1 (en) * 2005-04-07 2005-07-07 한국중부발전(주) Retractable Packing Ring for Steam Turbine
KR101572907B1 (en) * 2015-05-27 2015-12-11 조정봉 Flexible packing ring for turbine

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