JP4054608B2 - Plate brush seal - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a plate brush seal that seals between a shaft and a relative component that is relatively displaced. More specifically, for example, the present invention relates to an improved technology of a plate brush seal that seals between a rotating shaft and a relative component that is relatively displaced, such as an aircraft or a gas turbine.
[0002]
[Prior art]
  The prior art relating to the present invention includes a brush seal device 10 shown in FIG.0 isExists.
  FIG. 7 is a cross-sectional view of the brush seal device 100 attached to the casing 110 through which the rotary shaft 120 passes. The casing 110 is a fixed component such as a steam turbine or a gas turbine. And the brush seal apparatus 100 isA fluid to be sealed is sealed by being attached to the casing 110 and partitioning the rotary shaft 120.
[0003]
  In FIG. 7, the brush seal device 100 isIt is formed in a ring shape and is attached to the attachment groove 112 of the casing 110. This brush seal device 10ZeroThe main components are a brush seal 109, a back plate 102, and a support plate 103. In the brush seal 109, the bristles 101 are bundled in a certain thickness along the circumference and arranged in a wall shape, and one end portions thereof are joined to form the attachment portion 104. Further, the free end surface 105 of the brush seal 109 is disposed so as to face the rotating shaft 120. The wire diameter of the bristles 101 is generally 0.02 mm to 0.5 mm. And the number will be tens of thousands and hundreds of thousandsIn some cases.
[0004]
  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. The back plate 102 receives the pressure of the sealed fluid and deforms the bristles 101. Support not to.
  A holding plate 103 is formed as a ring plate on the other surface of the brush seal 109 so as to hold the mounting portion 104 side of the brush seal 109 with the back plate 102. The holding plate 103 is narrowed in the radial direction so that the free end side of the brush seal 109 is easily elastically deformed so that the brush seal 109 is exposed to the sealed fluid side.
  The back plate 102, the attachment portion 104 of the brush seal 109, and the holding plate 103 are welded at one end to form a coupling portion 106.
[0005]
  The linear bristles 101 in FIG. 7 are inclined in the rotating direction of the rotating shaft 120 with respect to the radial direction of the rotating shaft 120. In the normal state of the brush seal 109, the rotating shaft 120 is in contact with or close to the free end face 105 as shown by the solid line in FIG.
[0006]
  The brush seals 109 are bundled with a thickness with bristles 101 and arranged along the circumferential direction. The free end surface 105 of the brush seal 109 is precision finished by a wire electric discharge machine or the like so as to be fitted to the rotating shaft. However, since the bristles 101 are easily deformed, this processing is extremely difficult.
[0007]
  Brush seal device 10 configured as described above.0 isWhen the rotating shaft 120 comes into contact with the brush seal 109 due to vibration or swinging, the brush seal 109 is in a pressure contact state with the rotating shaft 120, and the inclination angle inclined in the rotation direction also increases.
  In this state, when the pressure of the fluid to be sealed is high pressure P1, the differential pressure (P1-P2) from the low pressure P2 increases, so that the straight bristles 101 of the brush seal 109 are elastically deformed and bent, A random gap is generated between the bristles 101.
[0008]
  FIG. 8 is a front view of the brush seal 109 of FIG. 7 as viewed from the inner diameter side free end surface 105.
  In FIG. 8, when the sealed fluid enters between the straight bristles 101, the bristles 101 bundled when viewed from the inner peripheral surface side have a gap between the bristles 101 as shown in FIG. Therefore, the sealed fluid leaks from the divided gap.
  Further, when the bristles 101 in an inclined state are divided by pressure, one side of the divided bristles tends to be displaced to be smaller than the set inclination angle, so that the tip of the bristles 101 is rotated. Since the contact state with the shaft 120 is further increased, the pressure contact force is further increased and the shaft 120 is worn.
  When the free end face 105 of the bristles 101 is worn, the sealed fluid leaks from between the worn free end face 105 and the rotating shaft 120.
[0009]
  Further, when the rotating shaft 120 swings in such a state, the free end surface 105 of the bristles 101 and the rotating shaft 120 pass through the axial center with respect to the position pressed against the rotating shaft 120 of the brush seal 101. Since the gap C between the gap and the gap C becomes larger, leakage of the sealed fluid occurs from the gap C.
  As described above, there is a problem to be solved in sealing the sealed fluid by the bristles 101.
[0010]
  Furthermore, as another prior art, the brush seal device shown in FIG.WhereExists. In FIG. 9, a thin plate seal 209 is stacked in the circumferential direction of the rotating shaft 120 to seal the high pressure side region P1 and the low pressure side region P2.
  The outer peripheral portion of the plate seal 209 is brazed to be formed on the mounting portion 104, and is attached to the groove portion of the casing 110 through the brazed mounting portion 104. In addition, a back plate 102 is disposed on the side surface of the low pressure side region P2 of the plate seal 209, and a holding plate 103 is disposed on the side surface of the high pressure region side P1. 209 supports both sides of 209.
[0011]
  However, when the rotary shaft 120 is eccentrically pressed against the plate seal 209 formed in this manner, the plate seal 209 that only forms an arc shape is not easily elastically deformed, and therefore, a spring constant corresponding to the elastic deformation. Therefore, the problem that it becomes difficult to follow the eccentricity of the rotating shaft 60 is caused. For this reason, since the space | interval of the free end surface of the plate seal | sticker 209 and the outer peripheral surface of the rotor 120 is taken large, a problem arises in the capability to seal to-be-sealed fluid.
[0012]
  Furthermore, since the plate seal 209 bonded and overlapped in the direction in which the pressure of the sealed fluid acts is only a flat plate, it acts in the direction between the flat plate bonding surfaces.PressureSealed flowBody isA problem arises in the sealing ability that easily flows out from the joining gap between the flat plates and prevents leakage of the sealed fluid. Furthermore, the laminated structure having a configuration in which flexibility is hindered is the free end face of the plate seal 209.(Same surface as 105 in FIG. 7)As a result, they are worn out early.
[0013]
[Problems to be solved by the invention]
  The present invention has been made in view of the above-described problems, and a technical problem thereof is to impart flexibility to the plate brush seal and to improve the sealing ability.
  Furthermore, it is intended to improve the elastic deformation capability of the plate brush seal against the pressing force from the opposing component, improve the sealing capability against the fluid to be sealed, and reduce the wear of the plate brush seal by the opposing component.
  Another object of the present invention is to improve the contact force of the plate brush seal with the facing parts and the followability corresponding to the fluctuation, thereby reducing the energy of the power and improving the sealing ability against the fluctuation.
[0014]
[Means for Solving the Problems]
  The present invention has been made to solve the above-described problems, and technical means for solving the problems are configured as follows.
[0015]
  The plate brush seal of the present invention according to claim 1 has a gap between parts that move relative to each other with a gap.OneOne ofSaidMounted on partsOtherOne ofSaidA plate brush seal that seals between parts,
  Attached to the one partPlate-shaped firstA first plate brush having a base and having the first brush portions of thin beams and first slits alternately arranged on the other component sidesingleFirst brush seal veneer having a portion and the first brush seal veneerPlaced adjacent to and almostFormed in the same shapeHaving a second base joined to the first base,For the first brush partFormable for insertionTheThis2nd slitWhen,For the first slitFormable for insertionTheThis2nd brush partAnd are arranged alternatelySecond plate brushsinglePartWhenA second brush seal veneer having,in frontThe first brush seal veneer and the second brush seal veneerThe brush seal single plate on one end side of the alternately arranged arrangement layersBetween the back plate portion that supports the side surface of the back plate portion and the back plate portionOf the alignment layerSingle brush seal plateSide ofAnd holding the first brush portion into the second slit and inserting the second brush portion into the first slit in the back plate portion and / or the holding plate.MakePress partIt is formed in a convex shape toward the plate brush part side facing from the side surfaceIs.
[0016]
  In the plate brush seal according to the first aspect of the present invention, the brush seal plate includes a pair of first and second brush seal single plates, the brush portion and the slit are formed by the pressing portion of the back plate portion and the pressing portion of the holding plate portion. Since the depths of being pressed and meshing with each other toward the free end side become deeper, the gaps on the side surfaces of the brush portions are in close contact with each other, and the sealing ability can be greatly improved. In addition, the plate brush portion has an elastic deformation force since the meshing depth of the laminated base portion is shallow, and effectively prevents wear due to the softening of friction against the contact of the other component.
[0017]
  In this plate brush portion, the sealed fluid is sealed by the back plate portion because the sealed fluid is partitioned by the back plate portion on the laminated base side. For this reason, the deformation | transformation deformation | transformation is provided rather than the sealing capability on the lamination | stacking base | substrate side where the mutual contact depth which each brush part of a plate brush part meshes | shits is shallow. And the free end part side of a plate brush part is deepened in the meshing depth of each brush part, and is improving the sealing capability. As a result, the plate brush seal exhibits flexibility as well as sealing ability, and wear due to contact with the contact parts is effectively prevented.
[0018]
  The plate brush seal of the present invention according to claim 2 is:The pressing portion of the back plate part or / and the holding plate isEach said brush sealsingleThe first plate brush single part and the second plate brush single part of the plateofTo each otherThe depth of engagement in the opposite directionTowards the free endXuDeeplyEngageTo the dimensionsProtrudingIs.
[0019]
  In the plate brush seal of the present invention according to claim 2, since the first plate brush portion and the second plate brush portion are configured to gradually engage with each other toward the free end portion, The free end portion side of the plate brush seal is formed in a brush portion having no gap, thereby improving the sealing ability. And since the meshing depth of each brush part is shallow on the lamination | stacking base part side of a brush part, an elastic deformation force is provided and it contacts softly with respect to contact | abutting with an opposing component, and abrasion is prevented effectively.
[0020]
  The plate brush seal of the present invention according to claim 3 is:eachThe brush sealsingleBoardIs the third of the third brush portion that is next adjacent to the joining surface in the arrangement direction of the second engagement surface of the second brush portion facing the first engagement surface in the arrangement direction of the first brush portion. Engagement surface is arrangedThey are arranged in a staggered pattern in the direction.
[0021]
  In the plate brush seal according to the third aspect of the present invention, when the brush seal plates are laminated, if the gaps between the adjacent brush portions and the slits are laminated so as not to communicate with each other in the lamination direction, the sealing ability is further increased. It becomes possible to improve.
[0022]
  The plate brush seal of the present invention according to claim 4 is the brush seal of the back plate portion and / or the holding plate.singleA solid lubricant is applied to the surface to be joined to the plate.
[0023]
  In the plate brush seal of the present invention according to claim 4, since the solid lubricant is applied to the back plate portion or / and the surface of the holding plate to be joined to the brush seal plate, the brush seal plate is formed of the back plate portion and / or Although it is in pressure contact with the holding plate, the elastic deformation with respect to the contact of the brush portion with the opposing component is facilitated by the effect of the lubricant. For this reason, it can prevent effectively that it is made to wear even if it rubs against an opposing part.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the board brush seal about an embodiment concerning the present invention is explained in full detail based on a drawing. The following drawings are not conceptual diagrams as patent drawings, but are design drawings.
[0025]
  FIG.Showing the first embodiment,Gas turbine caseinIn the inner peripheral surface with step 51The gap between the two parts into which the rotor 60 is fitted is divided into the high pressure P1 side and the low pressure P2 side.Board1 is a half sectional view of a brush seal device 1. FIG.
  FIG. 2 is a half sectional view of the assembled state before being sandwiched between the back plate portion and the holding plate of the plate brush seal shown in FIG.
FIG. 3 is a half sectional view of the plate brush seal 2 showing the first embodiment according to the present invention. FIG. 4 is a half sectional view of a plate brush seal 2 showing a second embodiment according to the present invention. FIG. 5 is a plan view of the plate brush seal 2 according to the third embodiment of the present invention. FIG. 6 is a plan view of the brush seal veneer 4 of the fourth embodiment of the present invention.
[0026]
  In FIG. 1, 1 is a plate brush seal device.(Also referred to as mechanical seal device in FIG. 1)It is. This plate brush seal device 1 is shown in FIG.Between the casing and the rotor 60MountingWasSay the whole structure. The fixed part 20 of the plate brush seal device 1 is one of the components (casesG)A snap ring 12 is attached to a step 51 provided on the inner peripheral surface. In addition, the fixing part 20shapeThere are various thingsPartsCombinedSteps provided on the inner peripheral surface of one partIt can also be attached to the part 51. Further, the free end portion 5 on the inner peripheral side of the plate brush seal 2 is disposed in contact with or close to the outer peripheral surface of a rotor (hereinafter also referred to as a rotating shaft) 60 which is the other component. Then, the sealed fluid on the high pressure P1 side is sealed by the plate brush seal 2.
[0027]
  In FIG. 1, the plate brush seal 2 has a configuration in which a back plate portion 6 and a holding portion 10 are attached to both sides of the brush seal plate 3 laminated. The back plate portion 6 and the holding portion 10 are auxiliary parts for the plate brush seal 2.
  The plate brush seal 2 generally has a laminated structure of a plurality of brush seal plates 3, but when the pressure of the fluid to be sealed is small according to the seal structure, the seal functions even with a single sheet structure.
[0028]
  The plate brush seal 2 is formed in an annular body having a certain thickness by arranging six pairs of brush seal plates 3 in a laminated state. The inner surface of the brush seal plate 3 that is annular is inclined by a row of thin beams inclined in the rotational direction of the rotor 60.Section 2A is configured. Further, the inner peripheral side of the plate brush seal 2 has a laminated structure of single brush portions 3A described below. Further, the mounting portion 2 of the plate brush seal 2 is formed by laminating the laminated base 3B on the outer periphery of the brush seal plate 3.BConfigure. This mounting part 2BThe outer peripheral surface is integrated by welding or the like.
[0029]
  The following will be described with reference to FIGS.One pairTo beOne of the first brush seal single plates 4 constituting the brush seal plate 3 is a first plate brush.singleIt consists of a part 4A and a first base part 4B. 1st brushsingleThe portion 4A is formed by forming a single thin beam-shaped first brush portion 4A1 between the first slits 4A2 by the first slits 4A2 in which the inner circumferences of the annular thin plates are formed in parallel. The first brush portion 4A1 of the thin beam has a cross section formed in a rectangular shape or a square shape.
  1st brush seal veneer 4The overall shape of the first brush portion 4A1 and the first slit 4A2 isVertical of the board from the first base 4BTo the free end 5 in the directionA large number of first slits 4A2 are formed at substantially equal intervals toward the lateral direction of the plate.One rowSeen from the free end 5UnevenStructureCompletionShiing. The outer periphery is formed in a plate-like first base portion 4B.
[0030]
  Further, the second brush seal single plate 4 is formed in the same manner as the first brush seal single plate 4. The second brush seal single plate 4 also has a second brush portion 4A1 and a second slit 4A2 in the plate direction on the inner peripheral side of the annular thin plate.Seen from the free end 5Second plate brush formed in an uneven shapesinglePart 4A is configured. Second plate brushsingleA second base 4B is formed in a plate shape opposite to the portion 4A.
  The thin beam of the second brush portion 4A1 has a rectangular or square cross section. However, as shown in FIG. 6, the first brush portion 4 </ b> A <b> 1 and the second brush portion 4 </ b> A <b> 1 do not necessarily have the same shape as seen from the plane depending on the ring-shaped size of the brush seal single plate 4. There is a case.
[0031]
  The pair of brush seal plates 3 is formed as a pair by laminating a first brush seal single plate 4 and a second brush seal single plate 4. The lamination of the first brush seal single plate 4 and the second brush seal single plate 4 is the first plate brush.singlePart 4A and second plate brushsingleThe portion 4A is engaged with each other through the second slit 4A2 and the first slit 4A2.
  The plate brush seal 2 is composed of a single layer or a plurality of layers of the brush seal plate 3.
[0032]
  FIG. 2 shows the assembled state of the previous step for forming the plate brush seal 2. In this embodiment, the brush seal plate 3 is formed into six layers and sandwiched between the back plate portion 6 and the holding plate 10 that form a ring shape from both sides, thereby forming the plate brush seal 2 of FIG.
  In FIG. 2, the back plate 6Side 6BAnd holding plate 10Side 10BOn the inner ring sideOf the shape inclined toward the protruding directionPressing portions 6A and 10A are formed. When the back plate portion 6 and the holding plate 10 are opposed to each other from both sides with the outer peripheral surface of the brush seal plate 3 being substantially the same, the pressing portions 6A and 10A of the back plate portion 6 and the holding plate 10 are the first plate. The brush single part 4A and the second plate brush single part 4A are engaged through the second and first slits 4A2 and 4A2.
  The pressing portions 6A and 10A are provided on the inner peripheral side of the back plate portion 6 and the holding plate 10.ConvexlyThus, when the brush seal plate 3 is sandwiched between the back plate portion 6 and the holding plate 10, the first plate brush single portion 4A and the second plate brush single portion 4A are the second slit 4A2 and the first slit 4A2. The inner circumference side is deeply meshed through.
[0033]
  The axial dimension of the free end portion 5 of the plate brush seal 2 is such that the plate brush seal 2Mounting part 2BAre joined to half the length in the same direction. The free end portion 5 side of the plate brush seal 2 is completely meshed until the meshing depth of the brush portions 4A1 and 4A1 becomes a single plate, so that there is a gap between the joint surfaces of the brush portions 4A1 and 4A1. Less. Further, the attachment portion 2B side of the brush portion 2A is in a state of being hardly engaged by the laminated base portion 3B. For this reason, the brush portion 2AoverallThe cross-sectional shape is trapezoidal.
  As a result, in the brush portion 2A, since the joining state of the brush portion 4A1 becomes dense on the free end portion 5 side, the sealing ability for partitioning the sealed fluid is improved. On the contrary, since the joining state of the brush part 4A1 is sparse on the laminated base 2B side of the brush part 2A, an elastic deformation ability is imparted. For this reason, the sealing ability of the portion to be sealed by the brush portion 2A is improved, and the laminated base portion 2B side that holds the portion to be sealed on the free end portion 5 side is provided with an elastic deformation ability to exhibit flexibility. Is done.
[0034]
  The plate brush seal 2 shown in FIG. 3 is formed into an annular body by laminating a plurality of sheets like the brush seal plate 3 shown in FIG. The brush seal plate 3 is sandwiched as shown in FIG. The back plate portion 6 and the holding plate 10 are different from those shown in FIG.Side 6BAnd the holding plate 10With side 10B (see FIG. 2)It is formed in a convex shape at the inner peripheral end. When the brush seal plate 3 is sandwiched and combined by the back plate portion 6 and the holding plate 10, the configuration is the same as the plate brush seal 2 shown in FIG. The other structure of the plate brush seal 2 of FIG. 3 is the same as that described in FIG.
[0035]
  The plate brush seal 2 shown in FIG. 4 is formed so that the outer diameter and inner diameter of the back plate portion 6 and the holding plate 10 are substantially the same. And the side surface of the holding plate 1010B (see Figure 2)In the middle, the pressing part 10AConvexlyIs formed.Further, a convex pressing portion 6A is formed at the inner peripheral end of the side surface 6B of the back plate 6.The other structure is substantially the same as the plate brush seal 2 of FIG.
[0036]
  Solid lubricant is coated on the side surfaces 6B and 10B (see FIG. 2) of the back plate portion 6 and the holding plate 10 that are joined to the brush seal plate 3. For this reason, the plate brush seal 2 shown in FIG. 1 exhibits the flexibility of the brush seal plate 3 even when the brush seal plate 3 is sandwiched between the back plate portion 6 and the holding plate 10.
  Further, the plate brush seal 2 shown in FIGS. 3 and 4 includes a back plate portion 6 and a holding plate 10.Provided on each side 6B, 10BSince the pressing portions 6A and 10A protrude in a convex shape, the contact area with the brush seal plate 3 is reduced, and the elastic deformation capability of the brush portion 2A is improved. For this purpose, the plate brush seal 2 is the other part.60Even if it abuts, the wear is reduced.
[0037]
  FIG. 5 is a plan view in which the plate brush seal 2 is attached to the rotor 60. The cross-sectional view is as shown in FIG.
  This brush seal veneer 4 isAnnular plateDivided into plate brush seal divided pieces 4CBoth endsThey are connected via the engaging portion 12 and connected to the annular plate. The brush seal single plate 4 is laminated in the axial direction. In this laminated state, the first brush portion 4A1 and the second brush portion 4A1 of the pair of first and second brush seal single plates 4 are formed by the pressing portions 6A and 10A of the back plate portion 6 and the holding plate 10 as shown in FIG. Similar to the brush seal plate 3, they are assembled in a pair while engaging with each other toward the free end 5 and increasing the depth of engagement.
  Since this plate brush seal division | segmentation piece 4C is a division | segmentation piece, many can be manufactured from a thin plate. For this reason, even if it is a large-diameter plate brush seal 2,MaterialIn order to improve yield,eachAdopted as a brush seal single plate 4.
  Other configurations are the same as those in FIG. The plate brush seal 2 has a large diameter.In the case ofAdopted. The plate brush seal segment 4C can be easily manufactured from a thin plate by fine processing such as etching, wire electric discharge processing, laser processing, and electron beam processing.CanThe
[0038]
  FIG. 6 is a plan view of one first brush seal single plate 4 of the brush seal plate 3. The first brush seal single plate 4 is manufactured from a thin plate to a ring plate by fine processing such as etching processing, wire electric discharge processing, laser processing, and electron beam processing.
  The second brush seal single plate 4 is formed in substantially the same manner as the first brush seal single plate 4. The first brush seal single plate 4 and the second brush seal single plate 4 are combined in a pair to constitute the brush seal plate 3. Further, when the brush seal plate 3 is combined in a laminated state and sandwiched between the back plate portion 6 and the holding plate 10 from both sides as shown in FIG. 2, the first and second brush portions 4A1, 4A1 are engaged with each other, as shown in FIG. It is comprised in the plate brush seal 2 as shown in FIG. In FIGS. 5 and 6, the second brush portion 4A1 is formed in a planar shape that fits with the trapezoidal first slit 4A2 when stacked on the brush seal plate 3 as viewed from above.
[0039]
  The laminated thickness of the brush seal single plate 4 of the embodiment described above is in the range of 0.5 to 5 mm, and this laminated thickness is determined by the pressure of the fluid to be sealed. Further, the material of the plate brush seal single plate 3 is steel, stainless steel, nickel-based alloy, ceramic material, or the like.
[0040]
【The invention's effect】
  According to the plate brush seal of the present invention, the brush seal plate is pressed against the pair of first and second brush seal single plates by the brush portion and the slit by the pressing portion of the back plate portion and the pressing portion of the holding plate portion. Because they mesh with each otherFirstBrush part andSecondThe brush portions mesh with each other toward the free end side. For this reason, the gaps between the joining surfaces of the brush portions are close to each other, and the sealing ability can be dramatically improved. In addition, the plate brush portion exerts an elastic deformation capability since the depth of engagement on the laminated base side is shallow, and effectively prevents friction due to the contact of the other part and wear.
[0041]
  This plate brush part is a fluid to be sealed by the back plate part on the laminated base side.Shut offTherefore, the fluid to be sealed by the back plateButSealed. For this reason, the deformation | transformation deformation | transformation is provided rather than the sealing capability on the lamination | stacking base | substrate side where the mutual contact depth which each brush part of a plate brush part meshes | shits is shallow.
  And the free end side of the brush part can arbitrarily set the depth at which each brush part meshes with the protruding height of the pressing part of the back plate part and the holding plate, and can improve the sealing ability as required it can. In particular, the sealing effect is further improved by increasing the meshing depth of the brush part toward the free end. As a result, the plate brush seal exhibits flexibility as well as sealing ability and abuts.The otherWear due to contact with parts is effectively prevented.
[0042]
  Furthermore, the plate brush seal can be formed in a staggered shape in the direction of action of the fluid to be sealed since the surfaces where the brush portions of the brush portion are joined can improve the sealing effect of the fluid to be sealed.
  In addition, by coating the surface of the back plate or / and the holding plate with the brush seal plate that is in contact with the solid lubricant, the brush seal plate is elastically deformed even if it comes into contact with the other part, and further, the response to contact It becomes possible to improve. For this reason, abrasion of a brush part can be prevented effectively.
[Brief description of the drawings]
FIG. 1 is a half sectional view of a plate brush seal device showing a first embodiment according to the present invention.
FIG. 2 is a half cross-sectional view of the assembled state in the pre-process of the plate brush seal shown in FIG. 1;
FIG. 3 is a half sectional view of a plate brush seal showing a first embodiment according to the present invention.
FIG. 4 is a half sectional view of a plate brush seal showing a second embodiment according to the present invention.
FIG. 5 is a plan view of a plate brush seal showing a third embodiment according to the present invention.
FIG. 6 is a plan view of a brush seal single plate showing a fourth embodiment according to the present invention.
FIG. 7 is a half sectional view of a conventional brush seal device.
8 is a plan view of the brush seal as seen from the inner periphery in a state where a sealed fluid is applied to the brush seal device shown in FIG. 7;
FIG. 9 is a perspective view of another conventional brush seal device.
[Explanation of symbols]
          1 Plate brush seal device(Mechanical seal device)
          2 Plate brush seal
          2A Brush part
          2B Mounting part
          3 Brush seal plate
          3A Brush single part
          3B Laminate base
          4 1st and 2nd brush seal veneer
          4A 1st and 2nd plate brushsinglePart
          4A1 first and second brush parts
          4A2 1st and 2nd slits
          4B first and second base
          4C plate brush seal split piece
          5 Free end
          6 Back plate
          6A, 10A pressing part
          10 Holding part
          12 Engagement part
          20 Fixed part
          51 One partStep provided on the inner peripheral surface of
          60 The other part (rotor)

Claims (4)

Attached to the part of the hand between the parts which move relative with a gap a brush seal for sealing between the other hand the parts,
A first brush having a plate-like first base portion attached to the one component and having a first plate brush portion in which first brush portions of thin beams and first slits are alternately arranged on the other component side. A single veneer,
The second brush seal is disposed adjacent to the first plate , has a second base part that is formed in substantially the same shape and is joined to the first base part, and is formed so as to be insertable into the first brush part. a second brush seal unit plate and a second plate brush portion and the second slit, and insertably formed Ru second brush portion to said first slits are arranged alternately that,
A back plate portion for supporting one end the brush seal unit plate side of the front Symbol first brush seal unit plate and the second brush seal veneer and alignment layers arranged alternately, between the back plate portion And a holding plate that sandwiches the side surface of the brush seal single plate of the array layer ,
In the back plate part and / or the holding plate, a pressing part for inserting the first brush part into the second slit and inserting the second brush part into the first slit protrudes from the side face toward the plate brush part side. A plate brush seal characterized by being formed into a shape . The pressing portion of the back plate portion and / or the retaining plate free depth to engage the opposing direction of the first plate brush single portion and the second plate brush single portion of each said brush seal unit plate brush seal according to claim 1, characterized in that protrudes deeply engaged thereby Ru dimension gradually toward the end portion s. Each brush seal single plate is next adjacent to the joining surface in the arrangement direction of the second engagement surface of the second brush portion facing the first engagement surface in the arrangement direction of the first brush portion. 3. The plate brush seal according to claim 1 , wherein the third engagement surfaces of the three brush portions are arranged in a staggered pattern in the arrangement direction. 4. The plate brush according to claim 1, wherein a solid lubricant is applied to a surface of the back plate or / and the holding plate to be bonded to the brush seal single plate. 5. sticker.

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