JP2002364755A - Brush sealing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To circularly form thin sealing plates in layers and simply assemble a mounting portion. SOLUTION: This brush sealing device comprises the sealing plates 3 having holding portions 5 on the side face of the mounting portion 4 where the thin plates 7 are in layer and a sealed portion 6 sealed with the sealing plates 3 in contact layer or in proximity layer at their side faces on the inner periphery side. Spaces between the thin plates 7 of the mounting portion 4 corresponding to spaces between the layered thin plates 7 of the sealed portion 6 are held via a holding portion 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to, for example, aircraft,
The present invention relates to a plate-shaped brush seal device for sealing between two components of a rotary shaft such as a gas turbine that move relative to each other. In particular, even if the position of one of the two components fluctuates slightly, the plate-shaped brush seal can be deformed in response to the fluctuation of the other component, and the seals are overlapped without gaps to seal between the two components. The present invention relates to a technical field of a brush seal device.

[0002]

2. Description of the Related Art In the prior art relating to the present invention, there is a brush seal device 100 shown in FIG. FIG. 14 shows a casing 110 through which the rotating shaft 120 passes, and the rotating shaft 1.
FIG. 3 is a cross-sectional view of the brush seal device 100 attached between the brush seal device 100 and the brush seal device 100. The casing 110 is a component of a steam turbine or a gas turbine, and includes a brush seal device 1.
Reference numeral 00 designates a partition between the casing 110 and the rotating shaft 120 to seal fluid pressure.

In FIG. 14, a brush seal device 100 is shown.
Is formed in a ring shape as a whole, and is attached to the groove 112 of the casing 110. The main components of the brush seal device 100 are a brush seal 109 and a back plate 1.
02 and a support plate 103. The annular brush seal 109 has the bristles 101 attached to be inclined with respect to the radial direction, and the tens or hundreds of thousands of bristles 10 are attached.
1 are arranged in a wall shape forming an annular shape along the circumference while being formed into a bundle having a certain thickness. One end of the joined outer periphery forms a mounting portion 104, and the free end surface 105 of the inner periphery of the brush seal 109 is formed on the peripheral surface so as to face the peripheral surface of the rotating shaft 120.

The wire diameter of the bristles 101 is generally 0.2
Those having a thickness of about 5 mm are used. And, in order to seal between the rotating shaft by the bristles 101,
Must be formed in a wall of a certain thickness in the direction of the seal.
For this reason, since tens of thousands of bristles 101 must be bundled and arranged in a large number, it is difficult to arrange the bristles 101 in the manufacture of the brush seal 109, and it is difficult to fix the attachment portion 104. Is a problem.

On the side surface of the brush seal 109, an annular back plate 102 is disposed with the side surface 108 in contact with the brush seal 109, and supports the bristles 101 against the action of the pressure of the fluid to be sealed. . Also, brush seal 10
9, a holding plate 103 is formed as a ring plate, and a mounting portion 10 of a brush seal 109 is formed between the holding plate 103 and the back plate 102.
They are arranged integrally as if nipping the four sides. The holding plate 103 is formed to have a narrow width in the radial direction so as to have a degree of freedom even when the fluid to be sealed acts or when the rotating shaft 120 is in contact with the holding plate 103, exposing the brush seal 109. One end of the back plate 102, the mounting portion 104 of the brush seal 109, and the holding plate 103 are welded to form a connecting portion 106. However, brush seal 10
9 has a problem that it is likely to be scattered because it is composed of a large number of bristles 101, and it is difficult to weld because the wire diameter is small.

In FIG. 14, the state shown by the imaginary line of the shaft 120 indicates a state in which the shaft 120 is normally fitted to the brush seal 109 without swinging during rotation.
In this normal state, the rotating shaft 120 indicated by a virtual line in FIG. 14 is close to or slightly in contact with the free end face of the brush seal 109. Then, when the rotating shaft 120 is eccentrically pressed against the brush seal 109, the brush seal 109 is pressed.
Are considered to be bent in the direction of rotation. For this reason, the bristles 101 are arranged in a state of being inclined with respect to the radial direction of the rotating shaft 120 so that the bristle 101 is easily deformed even when the rotating shaft 120 abuts. For this reason, it is extremely difficult to attach the bristles 101 at the set angle accurately.

In the brush seal device, when the rotating shaft 120 comes into contact with the brush seal 109 due to vibration, eccentricity, or the like, the brush seal 109 is in pressure contact with the rotating shaft 120 and also increases the inclination angle. . On the other hand, the opposite peripheral surface is
Will leave. At this time, since the free end face side of the inner circumference of the brush seal 109 is in a non-contact state with a large gap with the rotating shaft 120, each bristle 101 is pushed by the pressure of the sealed fluid flowing through the gap with the rotating shaft 120. Separation will result in gaps between the bristles, causing leakage of the sealed fluid.

Further, as another conventional technique, Japanese Patent Application Laid-Open No.
196801 exists. In the shaft seal described in this publication, a thin sheet is laminated along the circumferential direction instead of the bristles 101 in FIG. Although the exact technique for stacking the thin plates is unknown, this thin plate is
Since it is formed to have a certain width in the axial direction of 20, a wall having a thickness in the sealing direction (axial direction) is formed by superimposing one by one. However, as shown in FIG. 15, if the thin plates 115 are simply overlapped in the thickness direction, only the thin plates 115 are overlapped in a straight line direction, and it is difficult to form the thin plates 115 in an annular shape. In order to superimpose the thin plates 115 in an annular shape, it is necessary to contact the inner diameter side so as to form an annular shape. The gap that forms a square shape,
One after the other, one must be provided.

[0009] Such a thin plate 1 having a gap between the overlapping surfaces.
When mounting tens or tens of thousands of sheets, the mounting of the 15 becomes extremely difficult. Also, if the thin plates 115 are forcibly overlapped in a ring shape, the last seam surface in the ring shape will not match the first surface and cannot be formed in a ring shape, so that a function as a brush seal cannot be obtained. This is a major problem. Furthermore, since the overlapping step portion at the end of the attachment portion becomes a large step, it becomes difficult to attach and hold the attachment portion to the casing. Similarly, a step portion 117 is formed on the free end side of the seal portion, and the sealing ability is reduced.

[0010]

As described above, the brush seal device provided with the bristles 109 has hundreds of thousands of bristles 1.
It is extremely difficult to manufacture the brush seal 109 by bundling 01, and there is a limit in improving the sealing ability. That is, since the number of the bristles 101 constituting the brush seal 109 is too large, it is difficult to attach the bristles 101 by inclining and to fix the attaching portion 104, and further, to the set sealing ability. The problem of the width of arranging the bristles 101 in the direction of sealing together, and furthermore, when the brush seal 109 is separated from the rotating shaft 120 due to the eccentricity of the rotating shaft, the free end side of the bristle 101 is sealed in the sealing direction by the pressure of the sealed fluid. Therefore, there is a problem that leakage of the sealed fluid increases.

Further, in the brush seal device using a thin plate for solving this problem, the above-mentioned problem of the mounting portion for forming the thin plate 116 into an annular shape cannot be solved. Furthermore, it is more difficult to form a flexible gap between the overlapping surfaces of the thin plates on the seal portion side.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a technical problem to be solved is that when the thin plates are stacked to form an annular shape, the interval on the inner diameter side is reduced. Another object of the present invention is to make it possible to easily manufacture a brush seal having a sparsely spaced outer diameter. Another object of the present invention is to make it easy to fix the mounting portion of the brush seal. Also, in order to improve the sealing ability of the seal part of the brush seal,
An object of the present invention is to enable a space between thin plates to be easily formed by a holding portion of a mounting portion. Still another object of the present invention is to improve the flexibility in the circumferential direction in which the overlapping distances between the thin sealing portions can be easily set.

[0013]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the technical means thereof are configured as follows.

According to a first aspect of the present invention, there is provided a brush seal device in which a fixed portion on an outer periphery is attached to one of the parts which are fitted and relatively moved, and a brush seal is used to seal between the other shaft. A brush seal (2) having a mounting portion (4) on an outer periphery formed by laminating a flexible thin plate (7) in the circumferential direction of the shaft, and the mounting portion (4). A seal plate (3) having a holding portion (5) protruding from a side surface on which the respective thin plates (7) are stacked, and a seal in which the inner peripheral side surface of the seal plate (3) is overlapped or closely contacted to seal And a gap between the thin plates (7) of the mounting portion (4) corresponding to an interval at which the thin plates (7) of the seal portion (6) overlap with each other.
Is held through

In the brush seal device according to the first aspect of the present invention, when the holding portions (5) of the mounting portions (4) of the thin plates (7) are joined and overlapped, each By making the side surfaces of the thin plate (7) contact or approach each other, it is possible to form the annular seal portion (6) along the peripheral surface of the shaft.
Therefore, for example, the gap in which the shaft is fitted into the hole of the casing can be sealed by the seal portion (6). In particular, since the thin plate is formed like a rectangular plate,
When the both sides of the thin plate (7) are supported by the back plate and the holding plate, the brush seal can be easily assembled.

Further, since the holding portion (5) of the thin plate (7) can be fixed by joining the adjacent thin plates (7) one after another, it can be easily attached to the mounting portion of the brush seal device of the casing. be able to. And the seal part (6) can be arrange | positioned by making the thin plate (7) close, and it becomes possible to form in a circular shape. For this reason, it is possible to improve the sealing ability of the sealing portion (6).

The brush seal device of the present invention according to claim 2 has a configuration in which the thin plate (7) is inclined with respect to the radial direction of the shaft.

In the brush seal device according to the second aspect of the present invention, the holding portion (5) may be joined to the adjacent thin plate (7) while the thin plate (7) is tilted. Becomes possible. For this reason, the brush seal (2) made of a thin sheet having flexibility can be flexibly joined even when the shaft is eccentric and abuts.

According to a third aspect of the present invention, in the brush seal device of the present invention, the thin plate (7) has the mounting portion (4) formed in the radial direction of the shaft and is bent from the mounting portion (4). The seal portion (6) is formed in an inclined shape.

In the brush seal device according to the third aspect of the present invention, since the mounting portion (4) may be mounted in the radial direction passing through the shaft core, the mounting is simplified. Moreover, the sealing part (6)
Since the sides are accurately arranged according to the bending angle, the setting of the inclination angle is extremely easy.

According to a fourth aspect of the present invention, in the brush seal device of the present invention, the holding portion (5) is formed as a convex portion (5A) having a shape obtained by drawing the thin plate into an arc shape in cross section.

In the brush seal device of the present invention according to the fourth aspect, since the holding portion (5) is drawn by pressing to form the convex portion (5A), when the thin plates are overlapped, the convex portion is formed. If the (5A) is fitted into and engaged with the concave portion on the rear surface of the opposing convex portion (5A), the mounting can be positioned, and the mounting can be easily performed. Further, since the convex portion (5A) opposed to the concave portion on the back surface of the engaged holding portion (5) is engaged, it is possible to prevent each thin plate (7) from being easily shifted after assembly. And it becomes possible to closely arrange the intervals between the thin plates of the seal portion (6).

According to a fifth aspect of the present invention, in the brush seal device according to the present invention, the holding portion (5) is formed on a branch plate (5B) bent in the side direction on which the thin plates are stacked.

In the brush seal device according to the fifth aspect of the present invention, if the branch plate (5B) is joined, it can be easily assembled. Moreover, the sealing portion (6) is formed by this joint surface.
Can be set freely. Then, if the metal having a low melting point is poured into the bent gap and cooled, the mounting portion can be fixed.

According to a sixth aspect of the present invention, in the brush seal device of the present invention, the holding portion (5) is formed on the spacer portion (5C) by bending the outer peripheral side of the thin plate back.

In the brush seal device according to the sixth aspect of the present invention, if the folded portions of the spacer portion (5C) are joined one after another, it is possible to easily assemble the annular shape.
Further, since the thickness of the holding portion (5) is set according to the bending interval, the thickness can be easily formed. Moreover,
If the spacer portion (5C) is brought into pressure contact at the time of assembling, the distance between the seal portion (6) and each thin plate (7) can be easily adjusted.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a brush seal device according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, the following drawings are not conceptual drawings but design drawings.

A first embodiment of the brush seal device of the present invention is as follows. That is, the present invention is the brush seal device 1 in which the shaft 60 is fitted into the hole of the casing 50 and the fixed portion on the outer periphery is attached to the casing 50 which moves relatively, and the brush seal 2 seals between the shaft 50 and the shaft 60. . The brush seal device includes a brush seal 2 having a mounting portion 4 on an outer periphery formed in a ring shape by laminating a flexible thin plate 7 in a direction surrounding a peripheral surface of a shaft.
Is provided. The following brush seal means that a large number of thin plates protrude in a brush shape from the mounting portion to the free end side.

In the brush seal 2, a holding portion 5 is provided on a side surface of each thin plate 7 on which the mounting portion 4 is overlapped, and a seal plate 3 for maintaining a gap is formed. Further, a seal portion 6 is provided for sealing the fluid to be sealed by overlapping the side surfaces of the thin plates 7 on the inner periphery of the seal plate 3 in contact with or close to each other. Furthermore, the sealing plate 3
Are formed at an interval close to the contact that seals the fluid to be sealed, but the spacer serving as a spacer is arranged so that the interval between the seal plates 3 of the mounting portion 4 corresponding to this interval does not fluctuate. 5 is held.

FIG. 1 is a sectional view of a brush seal device 1 for partitioning a gap between a casing 50 of a gas turbine and a rotor 60 into a high pressure P1 side and a low pressure P2 side. FIG. 2 is a plan view of a part of the brush seal device of FIG. 1 as viewed from the inner diameter side.

1 and 2, reference numeral 1 denotes a brush seal device. The fixed portion 20 on the outer peripheral side of the brush seal device 1 is attached to a groove 51 provided on the inner peripheral surface of the casing 50 which is one of the components. Further, the free end surface 15 on the inner peripheral side of the brush seal device 1 is disposed so as to be in contact with or close to the outer peripheral surface of the shaft 60 which is the other component. Then, the fluid to be sealed on the high pressure P1 side is sealed by the seal portion 6 of the brush seal 2.

FIG. 3 is a plan view showing a half of the brush seal 2. FIG. 4 is an enlarged view of a part of FIG. FIG. 5 is an enlarged side view of the mounting portion of FIG. or,
FIG. 6 is a plan view of the mounting portion of FIG. The brush seal device 1 includes a brush seal 2, a back plate 16, and a holding plate 10.
Is the main configuration. Brush seal 2 of these
As shown in FIG. 3, the sealing plate 3 of a rectangular thin plate 7 is attached to be inclined in the rotation direction of the shaft 60, and is stacked in a laminated state along the circumferential direction so that the whole is annular. Is formed. The outer peripheral side of the seal plate 3 is shown in FIG.
As shown in FIG. 2, the mounting portion 4 is formed by welding.

The mounting portion 4 of the brush seal 2 has a structure shown in FIG.
As shown in FIG. 6, a holding portion 5 which is drawn into a hemispherical shape and protrudes from one side surface of the rectangular thin plate 7 is formed on the convex portion 5A and is provided at three places. The protruding height of the projection 5A is set by the gap H of the seal plate 3 generated in the mounting portion 4. Since the gap H has an outer diameter larger than the inner diameter when the seal portions 6 on the inner diameter side of the seal plate 3 are brought into contact with or close to each other and overlapped annularly along the circumferential surface of the shaft 60, The dimension is close to the maximum interval where a triangular gap is formed between the lamination surfaces of the seal plates 3 by the large diameter. The protrusion 5 has a height corresponding to the size of the gap H.
A height is formed.

The inclination angle of the seal plate 3 is determined by the rotational speed of the shaft,
It is determined by the magnitude of the eccentricity of the shaft, and furthermore, by the manner of swinging of the shaft. The brush seal 2 shown in FIG. 3 is an example in which the angle is designed and determined. In this example, the angle of the seal plate 3 is 42
Designed from 45 degrees to 45 degrees. The thin plate 7 itself is formed in a rectangular shape. As an example, the rectangular length of the thin plate 7 is formed in the range of 5 to 80 mm, and the width is formed in the range of 0.8 to 9 mm. The thickness of the thin plate 7 is 0.05 to 0.5 mm,
Preferably, one having a thickness of 0.08 to 0.3 mm was used. This dimension is set according to the size of the brush seal device 1, and the larger the diameter, the thinner the thin plate 7
Is also formed to be large. Further, the higher the pressure of the sealed fluid, the larger the width dimension is formed. The thin plate 7 is made of a material such as a steel plate, a stainless steel plate, a nickel-based alloy plate, and a ceramic plate.

Next, in the brush seal device 1, a ring-shaped back plate portion 16 for supporting the brush seal 2 is provided on the side on which the fluid to be sealed acts. The back plate 16 has a fixing portion 16A for holding the mounting portion 4 of the brush seal 2.
And a support surface 16B for supporting the brush seal 2 not to be extremely bent by the pressure of the sealed fluid. The brush seal 2 is supported by the support surface 16B so as not to be deformed even if it receives the pressure of the sealed fluid. For the back plate 16, a steel plate, a stainless plate, a copper plate, an aluminum plate, or the like is used.

A holding plate 10 is disposed on the opposite side of the back plate 16 supporting the brush seal 2. The holding plate 10 is formed in a ring shape having a width smaller than the radial width of the back plate 16. The holding plate 10 is a back plate 16
In cooperation with the above, the mounting portion 4 of the brush seal 2 is held. The holding plate 10 is also made of the same material as the back plate 16.

The brush seal 2 is integrally joined to the back plate 16 and the holding plate 10 by welding of an electron beam or the like with the mounting portion 4 as a boundary. The combination of the back plate portion 16, the brush seal 2, and the holding plate portion 10 forms a fixed portion 20. In FIG. 1, the holding plate portion 10 has a length that forms the fixing portion 20, but may have a length in the radial direction close to the back plate portion 16. Holding plate portion 10 longer than FIG.
In the case of (1), a space is formed between the brush seal 2 and the holding plate 10 so that the fluid to be sealed can flow.

Although the above-mentioned materials are selected for the back plate 16 and the holding plate 10, it is preferable to select the materials according to the linear expansion coefficient of the casing 50. For example, it may be made of a nickel-based alloy or other non-ferrous metals. Furthermore, various materials are selected depending on the type of fluid to be sealed, the temperature, or the conditions of other application fields.

FIG. 7 shows a second embodiment according to the present invention. FIG. 8 is a front view of FIG. FIG. 7 is substantially the same as the first embodiment except for the configuration of the brush seal 2. In the brush seal 2 of the second embodiment, a hemispherical convex portion 5A is provided on the mounting portion 4 of the seal plate 3 as a holding portion 5 which is drawn deeper than the holding portion 5 shown in FIG. It is formed in three places. The mounting portion 4 is formed to be the same as the radial surface of the shaft 60, and is formed in a shape inclined from the mounting portion 4 toward the seal portion 6.

In the case of the second embodiment, the tips of the convex portions 5A are engaged with the concave portions on the back surface of the adjacent convex portions 5A so as to be overlapped. At the same time, since the mounting portion 4 is formed in the radial direction with respect to the axis, if the mounting portion 4 is arranged along the outer peripheral surface of the back plate portion 16, the assembly is easily completed. In addition, the holding portion 5 is connected to the projection 5A of the seal plate 3 with the tip of the projection 5A facing.
When the seal plates 3 are engaged with the concave portions on the back surface in A, the respective seal plates 3 can be easily positioned, and the seal plates 3 do not slip on each other.

FIG. 9 shows a brush seal device 1 according to a third embodiment of the present invention. FIG. 10 is a perspective view of FIG. This brush seal device 1 is almost the same as the brush seal device 1 of the first embodiment except for the seal plate 3.

The seal plate 3 of FIG. 9 has the same configuration as the seal plate of FIG. 7 except that the mounting portion 4 is formed in the radial direction and that the mounting plate 4 is inclined from the mounting portion 4 toward the seal portion 6. is there. In the holding portion 5 of the third embodiment, three branch plates 5B are bent in the direction in which the seal plate 3 overlaps and the holding portion 5 is bent.
Is formed. Two branch plates 5B are bent in the same direction and one is bent to the opposite side. Then, twice the bending dimension is set to the dimension of the gap H. One of the bent branch plates 5B is joined to each other, and two other branch plates 5B are joined to each other. The attachment portion 4 can be fixed by welding, but can also be joined by pouring a metal having a low melting point.

FIG. 11 shows a brush seal device 1 according to a fourth embodiment of the present invention. The configuration of the brush seal device 1 of the fourth embodiment is almost the same as the brush seal device 1 of the first embodiment except for the brush seal 2.

FIG. 11 is a side view of a part of the brush seal 2. This brush seal 2 is U-shaped from the outer peripheral end of the mounting portion 4.
The holding portion 5 is a portion formed by bending into a letter shape and forming the spacer portion 5C. The interval H at which the seal plates 3 are overlapped with each other can be set according to the size of the bending radius at which the seal portion 3 is bent back from the mounting portion 4. Then, if the spacer portion 5 is joined, the annular brush seal 2 can be easily formed.

FIG. 12 is a front view showing a state in which the brush seal device 1 is attached to the shaft 60. The mounting state of the brush seal device 1 in FIG. 12 is such that the free end face 15 is 0.02 mm over the entire circumference at the position indicated by the dotted line indicating the shaft 60 in FIG.
They are fitted at the intervals of the order. The sealed fluid is effectively sealed by the brush seal 2.
This brush seal device 1 uses the seal plate 3 made of a thin plate as a brush. Since it is strong in the direction in which the pressure of the sealed fluid acts and is arranged in a direction having flexibility with respect to the eccentricity of the shaft 60, it is flexible with respect to the eccentricity of the shaft 60 together with the sealing ability. Therefore, it can be expected that wear caused by sliding can be effectively prevented.

FIG. 13 is a front view showing a state in which the shaft 60 is eccentrically pressed to curve the free end face 15 of the brush seal 2. This state is a state of the shaft 60 indicated by a solid line in FIG. 1 when viewed from the front in the rotation direction of the shaft 60.

When the shaft 60 is eccentric or vibrates, the brush seal 2
When pressed against the seal plate 3, the seal plate 3 is configured to have flexibility in the direction in which the pressure is received, so that the sliding resistance can be reduced flexibly. As a result, even if the shaft 60 has a large eccentricity, the shaft 60 can be sealed without being worn. Further, since the seal plate 3 is formed to be wide in the direction in which the pressure of the sealed fluid is received, the seal plate 3 is resistant to deformation. Therefore, the mounting portion 4 can be firmly held without tilting. Then, the sealed fluid can be reliably sealed.

[0048]

According to the brush seal device of the present invention, the holding portion can be formed on the seal plate by processing a thin plate, so that no special means is required for the back plate portion and the holding plate portion. The seal plate can be easily assembled. If the holding portions of the seal plate are joined in order, the seal portion of the brush seal is formed in an annular shape in a joined or close state, so that it can be expected that the sealing ability is exhibited. In addition, since the fluid to be sealed is sealed in the width direction of the seal plate, it has a strength against the pressure of the fluid to be sealed, and the sealing effect is exerted without the free end surface being inclined and being pressed against the shaft.

The brush seal is formed so that the mounting portion is formed in the radial direction of the shaft and the seal portion side is inclined, so that the mounting portion may be arranged in the radial direction, so that assembly is extremely easy. Become. In addition, if the mounting portion is mounted in the radial direction, the inclination angle on the seal portion side is inevitably determined, so that there is an effect that the inclination angles can be accurately arranged.

When the holding portion of the seal plate is formed into a drawn convex portion, the positioning can be easily performed by engaging the convex portion of the holding portion with the concave portion on the back surface of the convex portion of the seal plate facing the sealing portion. The plates can be easily stacked and assembled. In addition, since there is no slippage due to the engagement of the unevenness, the mounting becomes strong,
This has the effect of holding the seal portion.

[Brief description of the drawings]

FIG. 1 is an axial half-sectional view of a brush seal device.

FIG. 2 is a plan view of a part viewed from the inner diameter side of FIG. 1;

FIG. 3 is a half plan view of a brush seal according to the present invention.

FIG. 4 is a partially enlarged view of FIG. 3;

FIG. 5 is a partial side view of a mounting portion in the first embodiment according to the present invention.

FIG. 6 is a plan view of the seal plate of FIG. 5;

FIG. 7 is a partial side view of a mounting portion according to a second embodiment of the present invention.

FIG. 8 is a plan view of the seal plate of FIG. 7;

FIG. 9 is a partial side view of a mounting portion according to a third embodiment of the present invention.

FIG. 10 is a perspective view of the seal plate of FIG. 9;

FIG. 11 is a partial side view of a mounting portion according to a fourth embodiment of the present invention.

FIG. 12 is a front view of a normal arrangement relationship between the brush seal device of FIG. 1 and a shaft.

FIG. 13 is a front view showing a state where the shaft is eccentrically pressed against the brush seal device in FIG. 12;

FIG. 14 is a sectional view of a conventional brush seal device.

FIG. 15 is a side view of a reference example in which conventional brush seals are arranged in an overlapping manner.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 brush seal device 2 brush seal 3 seal plate 4 mounting portion 5 holding portion 5A convex portion 5B branch plate 5C spacer portion 6 seal portion 7 thin plate 10 holding plate portion 15 free end surface 16 back plate portion 16A fixing portion 16B support surface 20 Fixed part 50 Casing 60 Shaft

Claims (6)

[Claims] 1. A brush seal device in which a fixed part on an outer periphery is attached to one part which is fitted and relatively moved, and a seal part on an inner periphery is sealed between the other part and a brush. A brush seal having a mounting portion on an outer periphery formed by laminating thin plates in the circumferential direction of the shaft and having an annular shape, a seal plate having a holding portion protruding from a side surface on which the thin plates of the mounting portion are stacked, and the seal plate A sealing portion for sealing the inner peripheral side surface of the mounting portion so as to be in contact with or close to the sealing portion, and the gap between the thin plates of the mounting portion corresponding to the interval in which the thin plates of the sealing portion are overlapped is the holding portion. A brush seal device, wherein the brush seal device is held through the brush seal device. 2. The brush seal device according to claim 1, wherein the thin plate is inclined with respect to a radial direction of the shaft. 3. The thin plate, wherein the mounting portion is formed in a radial direction of the shaft, and is bent from the mounting portion so as to be inclined toward the seal portion. 2. The brush seal device according to 1. 4. The brush seal according to claim 1, wherein the holding portion is formed as a convex portion formed by drawing the thin plate into an arc shape in cross section. apparatus. 5. The brush seal device according to claim 1, wherein the holding portion is formed on a branch plate bent in a side direction on which the thin plates are stacked. 6. The brush seal device according to claim 1, wherein the holding portion is formed in a spacer portion which is bent around an outer peripheral side of the thin plate.