Sealing device, sealing structure, and assembling method of sealing structure

Abstract

The sealing device (640) is assembled between a cylindrical housing (20) and a rotor (30) which is coaxially arranged on the inner side of the housing (20) and rotates around a shaft, and is provided with a first sealing part (650) and a second sealing part (660), the first sealing part (650) is provided with a main body part (51) along the outer diameter part (32a) of the rotor (30), and is provided with a port part (51p) penetrating through the main body part (51) in the radial direction; and a groove portion (654) formed on the outer peripheral surface (51b) of the main body portion (51) so as to surround the periphery of the port portion (51p) when viewed from the outer peripheral surface (51b) side in the radial direction, the groove portion (654) having a pair of inclined surfaces (654b) opening toward the housing (20) side, and the second seal portion (660) is fitted to the groove portion (654), seals between the housing (20) and the first seal portion (50), and is in contact with the pair of inclined surfaces (654b).

Description

Technical Field

[0001] The present invention relates to a sealing device, a sealing structure, and an assembling method of the sealing structure. Background Art

[0002] As a device for switching the flow state of a fluid flowing in a plurality of flow paths provided in a mechanical system, a rotary valve device is known. Figure 1 The thermal management system TM of the electric vehicle shown includes four circulation flow paths CF1 , CF2 , CF3 , and CF4 in which the coolant flows, and a multi-port valve V10 as an example of a rotary valve device.

[0003] Circulation flow path CF1 is provided around battery unit BT. Circulation flow path CF2 is provided around heat exchanger R1 and has pump P1. Circulation flow path CF3 is provided around heat exchanger R2 and capacitor C2 and has tank RT. Circulation flow path CF4 is provided around electronic component ED and axle AX and has pump P2.

[0004] The multi-port valve V10 is provided to be able to join the circulation channels CF1 to 4 with each other. The multi-port valve V10 includes a housing V2, a rotor V3, and a sealing device V4. The housing V2 includes a plurality of port portions V2a connected to the circulation channels CF1 to 4.

[0005] The rotor V3 is provided inside the housing V2 so as to be rotatable around the central axis OV. The rotor V3 includes a plurality of port portions V3a connectable to the port portion V2a and a plurality of flow paths V3b connecting two of the plurality of port portions V3a.

[0006] The sealing device V4 seals between the housing V2 and the rotor V3 in a state where the coolant can flow between the port portion V2a and the port portion V3a.

[0007] By rotating the rotor V3, the multi-port valve V10 switches the interconnected state of the circulation flow paths CF1 to 4 and the flow state of the coolant flowing in the circulation flow paths CF1 to 4. It should be noted that another circulation flow path having an evaporator ER, an accumulator AR, a compressor CP, and a capacitor C1 is provided around the heat exchanger R2 and the capacitor C2.

[0008] As a structure of a rotary valve device, there is known a structure as described in Japanese Patent Gazette No. 2018-96543 (hereinafter referred to as Patent Document 1), which comprises: a valve body (i.e., a shell) of a valve cavity; a valve body (i.e., a rotor) arranged in the valve cavity and rotating via a valve shaft; and a sealing member, which is arranged between the valve body and the valve body and comprises a cylindrical body (i.e., a first sealing portion) and an outer rib (i.e., a second sealing portion). Summary of the invention

[0009] Technical problem to be solved by the invention

[0010] As for the sealing component described in Patent Document 1, the cylindrical body and the outer rib are integrally formed and formed of an elastic material such as synthetic rubber. The outer rib formed by the elastic material has a solid cross-section. When the outer rib is assembled as a valve device, it generates a reaction force corresponding to the fitting force given from the valve body and toward the central axial direction of the cylindrical body, thereby transmitting it to the cylindrical body. The reaction force generated in the outer rib is an elastic force caused by the elastic material. The reaction force based on the outer rib acts on the cylindrical body in the same direction as the fitting force, increasing the axial force based on the inner circumference of the cylindrical body. The inner circumference of the cylindrical body contacts the valve body, so the increase in the force based on the cylindrical body may deteriorate the sliding property of the sealing component to the valve body. In addition, when the force based on the cylindrical body increases, the assembly property of the sealing component in the valve device may deteriorate.

[0011] An object of the present invention is to reduce the radial component of the reaction force transmitted from the second sealing part to the first sealing part during assembly.

[0012] Solutions for solving technical problems

[0013] A first aspect of the present invention is a sealing device assembled between a cylindrical housing and a rotor coaxially arranged inside the housing and rotating around an axis. The sealing device includes a first sealing portion and a second sealing portion.

[0014] The first sealing portion has a main body portion along the outer diameter portion of the rotor, and has:

[0015] a port portion extending radially through the main body portion; and

[0016] a groove portion formed on the outer peripheral surface of the main body portion, having a groove bottom parallel to the outer peripheral surface, and formed to surround the port portion when viewed from the outer peripheral surface side in the radial direction,

[0017] The second sealing portion is mounted in the groove portion so as to contact the groove bottom, seals between the housing and the first sealing portion, and has a bent portion that can be bent during assembly.

[0018] A second aspect of the present invention is a sealing device assembled between a cylindrical housing and a rotor coaxially arranged inside the housing and rotating around an axis. The sealing device includes a first sealing portion and a second sealing portion.

[0019] The first sealing portion has a main body portion along the outer diameter portion of the rotor, and has:

[0020] a port portion extending radially through the main body portion; and

[0021] a groove portion formed on the outer peripheral surface of the main body portion, having a groove bottom parallel to the outer peripheral surface, and formed to surround the port portion when viewed from the outer peripheral surface side in the radial direction,

[0022] The second sealing portion is assembled in the groove portion so as to contact the groove bottom, seals between the housing and the first sealing portion, and has a bent portion that can be bent in a direction intersecting the radial direction during assembly.

[0023] A third aspect of the present invention is a sealing device assembled between a cylindrical housing and a rotor coaxially arranged inside the housing and rotating around an axis. The sealing device includes a first sealing portion and a second sealing portion.

[0024] The first sealing portion has a main body portion along the outer diameter portion of the rotor, and has:

[0025] a port portion extending radially through the main body portion; and

[0026] a groove portion formed on the outer peripheral surface of the main body portion, having a groove bottom parallel to the outer peripheral surface, and formed to surround the port portion when viewed from the outer peripheral surface side in the radial direction,

[0027] The second sealing portion is mounted in the groove portion so as to be in contact with the groove bottom, and seals between the housing and the first sealing portion. The second sealing portion is bendable during assembly.

[0028] A fourth aspect of the present invention is a sealing device assembled between a cylindrical housing and a rotor coaxially arranged inside the housing and rotating around an axis. The sealing device includes a first sealing portion and a second sealing portion.

[0029] The first sealing portion has a main body portion along the outer diameter portion of the rotor, and has:

[0030] a port portion extending radially through the main body portion; and

[0031] a groove portion formed on the outer peripheral surface of the main body portion, having a groove bottom parallel to the outer peripheral surface, and formed to surround the port portion when viewed from the outer peripheral surface side in the radial direction,

[0032] The second sealing portion is assembled in the groove portion so as to contact the groove bottom, and seals between the housing and the first sealing portion. The second sealing portion can be bent in a direction intersecting the radial direction during assembly.

[0033] A fifth aspect of the present invention is a sealing structure. The sealing structure has:

[0034] A cylindrical shell;

[0035] A rotor is coaxially arranged inside the housing and rotates around an axis;

[0036] a first sealing portion;

[0037] and a second sealing portion,

[0038] The first sealing portion has a main body portion along the outer diameter portion of the rotor, and has:

[0039] a port portion extending radially through the main body portion; and

[0040] a groove portion formed on the outer peripheral surface of the main body portion, having a groove bottom parallel to the outer peripheral surface, and formed to surround the port portion when viewed from the outer peripheral surface side in the radial direction,

[0041] The second sealing portion is mounted in the groove portion so as to be in contact with the groove bottom, and seals between the housing and the first sealing portion in a bent state.

[0042] The sixth aspect of the present invention is a sealing structure. The sealing structure has:

[0043] A cylindrical shell;

[0044] A rotor is coaxially arranged inside the housing and rotates around an axis;

[0045] a first sealing portion;

[0046] and a second sealing portion,

[0047] The first sealing portion has a main body portion along the outer diameter portion of the rotor, and has:

[0048] a port portion extending radially through the main body portion; and

[0049] a groove portion formed on the outer peripheral surface of the main body portion, having a groove bottom parallel to the outer peripheral surface, and formed to surround the port portion when viewed from the outer peripheral surface side in the radial direction,

[0050] The second sealing portion is mounted in the groove portion so as to be in contact with the groove bottom, and seals between the housing and the first sealing portion in a state of being bent in a direction intersecting the radial direction.

[0051] A seventh aspect of the present invention is a sealing device assembled between a cylindrical housing and a rotor coaxially arranged inside the housing and rotating around an axis. The sealing device includes a first sealing portion and a second sealing portion.

[0052] The first sealing portion has a main body portion along the outer diameter portion of the rotor, and has:

[0053] a port portion extending radially through the main body portion; and

[0054] a groove portion formed on the outer peripheral surface of the main body portion so as to surround the port portion when viewed from the outer peripheral surface side in the radial direction, the groove portion having a pair of inclined surfaces opened toward the housing side,

[0055] The second sealing portion is mounted in the groove portion to seal between the housing and the first sealing portion, and the second sealing portion is in contact with the pair of inclined surfaces.

[0056] An eighth aspect of the present invention is a sealing device assembled between a cylindrical housing and a rotor coaxially arranged inside the housing and rotating around an axis. The sealing device includes a first sealing portion and a second sealing portion.

[0057] The first sealing portion has a main body portion along the outer diameter portion of the rotor, and has:

[0058] a port portion extending radially through the main body portion; and

[0059] a groove portion formed on the outer peripheral surface of the main body portion so as to surround the port portion when viewed from the outer peripheral surface side in the radial direction, the groove portion having a pair of inclined surfaces and a groove depth portion that are linearly inclined in a direction intersecting the radial direction when viewed in cross section,

[0060] The second sealing portion is mounted in the groove portion to seal between the housing and the first sealing portion, and the second sealing portion is in contact with the pair of inclined surfaces.

[0061] The groove deep portion forms a first gap between the groove deep portion and the second sealing portion.

[0062] The second sealing portion can be deformed toward the first gap during assembly.

[0063] In another aspect of the present disclosure, in the sealing device of any one of the first to fourth, seventh and eighth aspects, the second sealing portion may have a hollow circular cross section.

[0064] In another aspect of the present disclosure, in the sealing device of any one of the first to fourth, seventh and eighth aspects, the second sealing portion may have a C-shaped cross section.

[0065] In another form of the present disclosure, based on the sealing device of any one of the first to fourth, seventh and eighth forms, the second sealing portion may have a substantially solid circular cross-section and a slit-shaped opening extending from the periphery of the cross-section of the second sealing portion toward the center of the cross-section.

[0066] In another form of the present disclosure, based on the sealing device of any one of the first to fourth, seventh and eighth forms, the second sealing portion may include an outer end portion in contact with the shell, and the shell may be in contact with the outer end portion along with assembly caused by relative movement relative to the first sealing portion based on an axial direction from a first direction toward a second direction opposite to the first direction.

[0067] Effects of the Invention

[0068] According to the present invention, it is possible to reduce the radial component of the reaction force transmitted from the second sealing portion to the first sealing portion during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 This is a schematic diagram of a cooling system of an electric vehicle equipped with a rotary valve device.

[0070] Figure 2 It is an exploded perspective view of the sealing structure of the first embodiment.

[0071] Figure 3 It is a longitudinal sectional view of the sealing structure of the first embodiment.

[0072] Figure 4 It is a perspective view of the sealing device according to the first embodiment.

[0073] Figure 5 It is an enlarged cross-sectional view of the sealing device according to the first embodiment.

[0074] Figure 6 (a) is an enlarged cross-sectional view showing a state in which only one opening end of the second sealing portion of the first embodiment is in contact with the edge of the housing. Figure 6 (b) is an enlarged cross-sectional view of a state in which the other opening end of the second sealing portion of the first embodiment is in contact with the edge of the housing. Figure 6 (c) is an enlarged cross-sectional view of the sealing structure of the first embodiment when assembly is completed.

[0075] Figure 7 (a) is an enlarged cross-sectional view of a comparative example when the second sealing portion is in non-contact with the housing. Figure 7 (b) is an enlarged cross-sectional view of the sealing structure of the comparative example when assembly is completed.

[0076] Figure 8 : is a graph showing the relationship between the deformation amount of the seal portion and the reaction force during assembly of the seal structure according to the first embodiment.

[0077] Fig. 9 It is an enlarged cross-sectional view of the sealing device according to the second embodiment.

[0078] Fig.10 (a) is an enlarged cross-sectional view when the housing inserted relative to the sealing structure starts to contact the folded-back end of the second sealing portion during assembly of the sealing structure of the second embodiment. Fig.10 (b) is the shell ratio Fig.10 (a) is an enlarged cross-sectional view further relative to the insertion. Fig.10 (c) is an enlarged cross-sectional view of the sealing structure of the second embodiment when assembly is completed.

[0079] Fig.11 It is an enlarged cross-sectional view of a sealing device according to a third embodiment.

[0080] Fig.12 It is an enlarged cross-sectional view of a sealing device according to a fourth embodiment.

[0081] Fig.13 It is an enlarged cross-sectional view of a sealing device according to a fifth embodiment.

[0082] Fig.14 It is an enlarged cross-sectional view of a sealing device according to a sixth embodiment.

[0083] Fig.15 It is an enlarged cross-sectional view of a sealing device according to a seventh embodiment.

[0084] Fig.16 It is an enlarged cross-sectional view of a modified example of the sealing device of the present invention.

[0085] Fig.17 (a) is an enlarged cross-sectional view of another comparative example when the second sealing portion is in non-contact with the housing. Fig.17 (b) is an enlarged cross-sectional view of another comparative example of a sealing structure when assembly is completed.

[0086] Fig.18 It is an enlarged cross-sectional view of a modified example of the sealing device of the present invention.

[0087] Fig.19 (a) is an enlarged cross-sectional view of a case where a second sealing portion included in a modified example of the sealing device of the present invention is in non-contact with the housing. Fig.19 (b) is an enlarged cross-sectional view of a modified example of the sealing device of the present invention when assembly is completed. DETAILED DESCRIPTION

[0088] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0089] The sealing structure 10 of the present invention is a rotary valve device that switches the flow state of a fluid flowing through a plurality of flow paths provided in one mechanical system (not shown).

[0090] (1) First Embodiment

[0091] like Figure 2 and Figure 3 As shown, the sealing structure 10 of the first embodiment includes a housing 20 , a rotor 30 and a sealing device 40 .

[0092] The shell 20 is a hollow cylindrical shape extending along the central axis CA. The shell 20 has a plurality of (four in the present embodiment) port holes 20p on the cylindrical surface. The plurality of port holes 20p are arranged in a circumferential direction. Each port hole 20p penetrates through the cylindrical surface in a radial direction. The shell 20 has an inner circumferential surface 20b. The shell 20 has a snap-fit ​​mechanism (not shown in the figure). The shell 20 can be snap-fitted with a first snap-fitting portion (not shown in the figure) provided around the sealing structure 10 in a mechanical system (not shown in the figure). By snapping the snap-fitting mechanism with the first snap-fitting portion, the shell 20 is relatively fixed relative to the mechanical system.

[0093] The rotor 30 is substantially cylindrical and is coaxially arranged inside the housing 20. The rotor 30 is rotatable around the central axis CA. The rotor 30 includes a main body 32, a protruding portion 33, and a flow path 34.

[0094] The main body 32 is cylindrical and extends along the central axis CA. The main body 32 has an outer diameter portion 32a and a plurality of (two in this embodiment) port holes 30p. The plurality of port holes 30p are arranged in the circumferential direction on the outer diameter portion 32a.

[0095] The protrusion 33 is cylindrical and extends along the central axis CA. The protrusion 33 protrudes from the end surface 32e of the main body 32. An opening 36a is formed on the end surface of the protrusion 33.

[0096] The flow path portion 34 is formed inside the rotor 30. The flow path portion 34 includes a first flow path 36, a plurality of second flow paths 38, and a converging portion 34a.

[0097] The first flow path 36 extends axially from the opening 36a of the protrusion 33 to the inside of the main body 32. The second flow path 38 extends radially from each of the port holes 30p of the main body 32 to the inside of the main body 32. The plurality of second flow paths 38 correspond to each of the plurality of port holes 30p. The first flow path 36 and the plurality of second flow paths 38 merge at the merging portion 34a.

[0098] It should be noted that the rotor 30 may not have the first flow path 36 and the opening 36a. A plurality of second flow paths 38 may be connected to each other.

[0099] The port holes 30p of the rotor 30 are opposite to any one of the port holes 20p of the housing 20 when the rotatable rotor 30 is in a predetermined phase. At this time, the fluid flowing in the second flow path 38 flows to the port hole 20p of the housing 20 opposite to the port hole 30p via the port portion 51p of the sealing device 40 described later.

[0100] The combination of the port hole 30p of the rotor 30 and the port hole 20p of the housing 20 opposite to the port hole 30p changes according to the phase of the rotor 30. That is, the phase of the rotor 30 changes due to the rotation of the rotor 30, thereby changing the combination of the port hole 30p and the port hole 20p. As a result, the flow state of the fluid flowing in the mechanical system is switched.

[0101] The fluid flowing in the sealing structure 10 is, for example, a liquid such as oil or long-life coolant (LLC).

[0102] <Sealing device 40>

[0103] like Figure 3 As shown, the sealing device 40 is assembled between the housing 20 and the rotor 30. The sealing device 40 has a first sealing portion 50 and a second sealing portion 60.

[0104] <First sealing portion 50>

[0105] The first sealing portion 50 is substantially cylindrical. Figure 3 As shown, the first seal portion 50 is arranged along the outer diameter portion 32a of the rotor 30 during assembly. The first seal portion 50 includes a body portion 51 , a plurality of (four in this embodiment) port portions 51p, and a groove portion 54 .

[0106] like Figure 4 As shown, the main body 51 is a hollow cylindrical shape extending along the central axis CA. The main body 51 has an inner peripheral surface 51a and an outer peripheral surface 51b. The inner peripheral surface 51a of the main body 51 faces the outer diameter portion 32a of the rotor 30 during assembly.

[0107] The main body 51 is formed of a resin material. The main body 51 is preferably formed of a thermoplastic resin material. The main body 51 is preferably formed of a fluororesin such as polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), polychlorotrifluoroethylene (PCTFE), etc. The main body 51 can also be formed of an elastomer such as synthetic rubber. It should be noted that the material forming the main body 51 is preferably more rigid than the material forming the second sealing portion 60 described later. In addition, the surface of the main body 51 preferably has a lower friction coefficient than the surface of the second sealing portion 60.

[0108] The main body 51 has a plurality of engaging portions 52 and a plurality of engaging portions 53. The engaging portion 52 protrudes along the first axial direction from a portion of an edge along the first axial direction of the central axis CA of the main body 51. The engaging portion 53 protrudes along the second axial direction from a portion of an edge of the main body 51 on the side opposite to the first axial direction. The plurality of engaging portions 52, 53 are arranged along the circumferential direction of the main body 51. The engaging portions 52, 53 can respectively engage with a second engaging portion (omitted from the illustration) provided around the sealing structure 10 in the mechanical system (omitted from the illustration). The main body 51 is relatively fixed relative to the mechanical system by engaging the engaging portions 52, 53 with the second engaging portion.

[0109] Each port portion 51p penetrates the main body portion 51 in the radial direction. The plurality of port portions 51p correspond to the port holes 20p of the housing 20.

[0110] The groove portion 54 is formed in a concave shape relative to the outer peripheral surface 51b of the main body portion 51. The groove portion 54 includes an annular groove 55 and a side groove 56. Figure 4 As shown, the annular groove 55 and the side groove 56 are formed to surround each of the plurality of port portions 51p when viewed from the radial outer peripheral surface 51b side. The annular groove 55 surrounds the outer peripheral surface 51b in the circumferential direction. A pair of annular grooves 55 sandwich the plurality of port portions 51p in the axial direction of the main body 51. The side groove 56 is provided between the pair of annular grooves 55. The plurality of side grooves 56 sandwich the plurality of port portions 51p in the circumferential direction of the main body 51.

[0111] The groove bottoms of the annular groove 55 and the side grooves 56 are along the cylindrical surface parallel to the outer peripheral surface 51b. Figure 5 As shown, the groove portion 54 has a groove bottom 54a parallel to the outer peripheral surface 51b. In addition, the groove portion 54 has a groove wall 54b extending from the groove bottom 54a toward the outer peripheral surface 51b.

[0112] The first seal portion 50 has a function of sealing between the inner circumferential surface 51a of the first seal portion 50 and the outer diameter portion 32a of the rotor 30. It should be noted that the sealing function of the first seal portion 50 preferably acts on the area where the inner circumferential surface 51a of the first seal portion 50 and the outer diameter portion 32a of the rotor 30 face each other to suppress the intrusion of foreign matter from the outside of the area. The sealing function of the first seal portion 50 may not act to seal the fluid flowing in the sealing structure 10.

[0113] <Second sealing portion 60>

[0114] like Figure 4As shown, the second sealing portion 60 is arranged along the groove portion 54 of the first sealing portion 50. The second sealing portion 60 is separate from the first sealing portion 50. The second sealing portion 60 has an annular portion 67 and a mounting portion 68. The annular portion 67 corresponds to a pair of annular grooves 55 of the groove portion 54. The mounting portion 68 corresponds to the side grooves 56 of the groove portion 54. The mounting portion 68 is mounted between the pair of annular portions 67. The second sealing portion 60 has a function of sealing between the first sealing portion 50 and the housing 20.

[0115] The second sealing portion 60 is formed of an elastic body such as synthetic rubber. When the fluid flowing through the sealing structure 10 is LLC, the second sealing portion 60 is preferably formed of ethylene propylene diene monomer (EDPM).

[0116] The second sealing portion 60 is composed of an elastic substrate having a predetermined cross-sectional shape. Specifically, the second sealing portion 60 has a shape that allows the substrate to extend continuously in a direction intersecting with the cross section of the substrate. That is, the annular portion 67 has a shape that allows the cross section of the substrate to extend continuously in an annular shape. In addition, the mounting portion 68 has a shape that allows the cross section of the substrate to extend continuously along the central axis CA so that the direction intersecting with the cross section of the substrate is consistent with the central axis CA of the first sealing portion 50.

[0117] like Figure 5 As shown, the second sealing portion 60 has a V-shaped cross section. The V-shaped cross section of the second sealing portion 60 has a thickness. When observed in cross section, the second sealing portion 60 is open toward the housing 20 side. That is, the second sealing portion 60 has an opening portion 60a. The opening portion 60a is open toward the housing 20 side. The second sealing portion 60 has two opening ends 64 and a folded end 66 when observed in cross section. In addition, the second sealing portion 60 has a bent portion 62.

[0118] The opening 60a extends continuously along the extending direction of the cross section of the second sealing portion 60. That is, the opening 60a is along the extending direction of the second sealing portion 60. The opening 60a is formed in a concave shape with respect to the outer periphery of the second sealing portion 60 in cross-sectional view.

[0119] like Figure 5 As shown, the opening end 64 is the end of the opening side of the opening portion 60a in cross-sectional view. The two opening ends 64 in the annular portion 67 are arranged along the axial direction of the first sealing portion 50. The two opening ends 64 in the mounting portion 68 are arranged along the circumferential direction of the first sealing portion 50.

[0120] The folded end 66 is an end portion on one side folded back in a V-shape when viewed in cross section.

[0121] The second seal 60 is mounted on the first seal 50 so that the folded end 66 contacts the groove bottom 54a. At this time, a gap S1 is formed between the second seal 60 and the groove wall 54b. In other words, a gap S1 is formed between the curved portion 62 of the second seal 60 and the groove 54.

[0122] When the second seal portion 60 is mounted in the groove portion 54 , the second seal portion 60 applies an axial force to the rotor 30 caused by the inner peripheral surface 51 a of the first seal portion 50 to the first seal portion 50 .

[0123] The second sealing portion 60 assembled in the groove portion 54 makes the opening end 64 protrude radially from the outer peripheral surface 51b of the first sealing portion 50. The second sealing portion 60 assembled in the groove portion 54 makes the opening end 64 contact with the housing 20 in a manner that can be fitted with the inner peripheral surface 20b of the housing 20 during assembly. The opening end 64 is an example of an outer end. At this time, the second sealing portion 60 is pressed against the groove bottom 54a by the housing 20 to seal between the first sealing portion 50 and the housing 20.

[0124] At this time, the second sealing portion 60 surrounds the port portion 51p of the first sealing portion 50 by the annular portion 67 and the bridging portion 68 when viewed from the radial direction. At this time, the annular portion 67 suppresses the axial leakage of the fluid flowing between the port portion 51p of the first sealing portion 50 and the port hole 20p of the housing 20. At this time, the bridging portion 68 suppresses the leakage of the fluid between the adjacent port portions 51p or port holes 20p.

[0125] At this time, the axial force applied from the first seal portion 50 to the rotor 30 increases as the second seal portion 60 is pressed against the groove bottom 54 a by the housing 20 .

[0126] The bent portion 62 is a portion extending from the two opening ends 64 toward the folded-back end 66 in the second seal portion 60. In other words, the bent portion 62 is configured to include the opening ends 64.

[0127] The bent portion 62 is bent in a direction intersecting the radial direction of the first sealing portion 50 when assembled with the housing 20. That is, the bent portion 62 can be bent in a direction intersecting the radial direction of the first sealing portion 50 when assembled. In other words, the second sealing portion 60 can be bent in a direction intersecting the radial direction of the first sealing portion 50 when assembled.

[0128] The second sealing portion 60 has a space 60b sandwiched between two opening ends 64. The space 60b is adjacent to the curved portion 62 in cross-sectional view. The space 60b is located closer to the center of the cross section than the curved portion 62 in cross-sectional view.

[0129] It should be noted that the bending of the curved portion 62 is preferably accompanied by elastic deformation in the axial direction. The bending of the curved portion 62 may also be accompanied by volume compression of the elastic body.

[0130] The structure of the second sealing portion 60 that is bendable when assembled with the housing 20 will be described in detail in the assembling method of the sealing structure 10 to be described later.

[0131] <Assembling method of sealing structure 10>

[0132] Next, an example of a method of assembling the sealing structure 10 will be described.

[0133] First, the first seal portion 50 is assembled to the rotor 30 . Then, the second seal portion 60 is mounted in the groove portion 54 of the first seal portion 50 assembled to the rotor 30 . Thus, the sealing device 40 is assembled to the rotor 30 .

[0134] Then, the housing 20 is assembled by moving the housing 20 from the outside toward the sealing device 40 relative to the sealing device 40 in the axial direction (see Figure 6 ) That is, the sealing device 40 is assembled by relatively moving from the outside to the inside of the housing 20 in the axial direction.

[0135] like Figure 6 As shown in (a), first, the first opening end 64 on the side close to the housing 20 contacts the edge of the housing 20. At this time, in the cross-sectional view, a moment in the moving direction of the housing 20 is applied to the curved portion 62 including the first opening end 64. At this time, a fitting force that acts in a manner of pressing from the housing 20 toward the groove bottom 54a is applied to the second sealing portion 60 assembled in the groove portion 54. At this time, the curved portion 62 including the first opening end 64 is in a state of bending in a direction intersecting with the radial direction of the first sealing portion 50. At this time, the curved portion 62 including the first opening end 64 is bent to close the opening portion 60a.

[0136] Then, if Figure 6 (b) and Figure 6 As shown in (c), the second opening end 64 contacts the housing 20 by further relative movement of the housing 20 with respect to the sealing device 40. At this time, a fitting force from the housing 20 toward the groove bottom 54a is further applied to the second sealing portion 60 assembled in the groove portion 54. At this time, the curved portion 62 including the second opening end 64 is bent in a direction intersecting with the radial direction of the first sealing portion 50.

[0137] Next, the sealing device 40, the sealing structure 10, the assembly method of the sealing structure 10, the function and effect thereof will be described. Figure 7A sealing structure 10H as a comparative example with respect to the first embodiment will be described. In the description of the sealing structure 10H, when the same components as those of the sealing structure 10 of the first embodiment are used, the reference numerals and names of the components are used as they are.

[0138] like Figure 7 As shown, the sealing structure 10H of the comparative example has a sealing device 40H instead of the sealing device 40 in the first embodiment. Figure 7 As shown in FIG. 4 , the sealing device 40H has a second sealing portion 60H instead of the second sealing portion 60. Figure 7 As shown in (a), the second sealing portion 60H has a solid circular cross-section. That is, the second sealing portion 60H of the comparative example does not have an opening portion 60a, a curved portion 62, and an open end 64. In addition, the second sealing portion 60H of the comparative example does not have a structure that can be bent during assembly. The protruding length of the second sealing portion 60H assembled on the first sealing portion 50 from the outer peripheral surface 51b in the radial direction is the same as the protruding length of the second sealing portion 60 of the first embodiment. In addition, the sealing structure 10H of the comparative example is the same structure as the sealing structure 10.

[0139] The second seal portion 60H of the comparative example assembled in the groove portion 54 is elastically deformed in a manner compressed by the fitting force from the housing 20 toward the groove bottom 54a during assembly. At this time, the second seal portion 60H assembled in the first seal portion 50 generates a reaction force corresponding to the fitting force. The reaction force generated in the second seal portion 60H is an elastic force caused by the elastic body. The reaction force (elastic force) based on the second seal portion 60H is transmitted radially toward the center axis CA in the same manner as the fitting force relative to the first seal portion 50. When the radial reaction force (elastic force) toward the center axis CA is transmitted to the first seal portion 50, the axial force applied to the rotor 30 from the first seal portion 50 increases. When the force applied to the rotor 30 from the first seal portion 50 increases, the friction force between the first seal portion 50 and the rotor 30 increases. In this case, the sliding property of the first seal portion 50 relative to the rotor 30 deteriorates. In addition, in this case, the assembly property of the sealing structure 10H deteriorates.

[0140] Furthermore, when the reaction force generated in the second seal portion 60H due to the fitting force from the housing 20 is large, the friction force between the second seal portion 60H and the housing 20 increases, so that the assemblability of the seal structure 10H deteriorates.

[0141] On the other hand, the sealing device 40 has a curved portion 62 that can be bent in a direction that intersects with the radial direction of the first sealing portion 50 during assembly. That is, the sealing device 40 has a second sealing portion 60 that can be bent in a direction that intersects with the radial direction of the first sealing portion 50 during assembly. In the second sealing portion 60 assembled to the first sealing portion 50, a part of the fitting force applied from the housing 20 during assembly is used for bending of the curved portion 62. Therefore, the reaction force (elastic force) generated in the second sealing portion 60H corresponding to the fitting force from the housing 20 during assembly of the sealing structure 10 is smaller than that of the sealing structure 10H of the comparative example (refer to FIG. 1 ). Figure 8 ). Thus, since the sealing device 40 includes the second sealing portion 60, the radial component of the reaction force (elastic force) transmitted from the second sealing portion 60 to the first sealing portion 50 during assembly can be reduced.

[0142] The sealing structure 10 having the sealing device 40 has a smaller radial component of the reaction force (elastic force) transmitted from the second sealing portion 60 to the first sealing portion 50, so the friction between the first sealing portion 50 and the rotor 30 is smaller than that of the sealing structure 10H. As a result, the sealing structure 10 can improve the assemblability of the sealing structure 10. In addition, the sealing structure 10 can improve the sliding property of the rotor 30 because the friction between the first sealing portion 50 and the rotor 30 is reduced. That is, after the sealing device 40 is assembled to the rotor 30, when the sealing structure 10 is assembled through the assembly housing 20, the deterioration of the sliding property of the rotor 30 accompanying the assembly can be suppressed.

[0143] In addition, the sealing structure 10 having the sealing device 40 has a smaller reaction force (elastic force) generated in the second sealing portion 60H corresponding to the fitting force from the housing 20, so the friction between the second sealing portion 60H and the housing 20 is smaller than that of the sealing structure 10H. As a result, the sealing structure 10 can further improve the assemblability of the sealing structure 10. That is, the sealing structure 10 can improve the assemblability of the housing 20 when the sealing device 40 is assembled to the rotor 30 and then assembled by assembling the housing 20.

[0144] The bent portion 62 includes an open end 64 that contacts the housing 20 during assembly. Therefore, the bent portion 62 can be bent based on the moment applied during assembly in accordance with the relative movement from the outside to the inside of the housing 20 in the axial direction. Thus, the sealing device 40 can bend the second sealing portion 60 more easily by further applying a fitting force from the housing 20 during assembly.

[0145] The second sealing portion 60 of the sealing device 40 has an opening 60a. In this case, since the section modulus of the second sealing portion 60 is reduced, the second sealing portion 60 is easily bent. Thus, the second sealing portion 60 is easily bent when the sealing device 40 is assembled.

[0146] The bent portion 62 of the sealing device 40 can be bent so as to close the opening 60a during assembly. As a comparative example of the bent portion 62 bent so as to close the opening 60a during assembly, it is conceivable that Fig.17 The sealing device A40 shown. Fig.17 As shown in (a), the sealing device A40 has a second sealing portion A60 instead of the second sealing portion 60 of the sealing device 40. The second sealing portion A60 has a V-shaped cross-section that is axially open toward the first sealing portion 50. The second sealing portion A60 has an opening portion A60a and an opening end A64. During the assembly of the sealing device A40, when the housing 20 is moved from the opening portion A60a side to the second sealing portion A60 for assembly, the opening end A64 on the housing 20 side contacts the housing 20. At this time, as shown in FIG. Fig.17 As shown in (b), the opening end A64 on the housing 20 side is deformed along the moving direction of the housing 20. At this time, the second sealing portion A60 is deformed to expand the opening portion A60a. When the second sealing portion A60 is deformed to expand the opening portion A60a during assembly of the housing 20, the second sealing portion A60 may flip toward the opening portion A60a. When the second sealing portion A60 flips toward the opening portion A60a, the sealing performance of the second sealing portion A60 may be damaged.

[0147] On the other hand, Figure 6 As shown, the second sealing portion 60 is not easily turned over toward the opening 60a side because the bent portion 62 is bent to close the opening 60a during assembly. Thus, the sealing device 40 can suppress the second sealing portion 60 from turning over during assembly.

[0148] The second sealing portion 60 of the sealing device 40 has a V-shaped cross section. At this time, the second sealing portion 60 is easily bent at a portion extending from the opening end 64 to the folded end 66. Thus, the sealing device 40 can easily determine the bent portion during assembly.

[0149] The opening 60a of the second seal 60 is open toward the housing 20. That is, in the second seal 60, two opening ends 64 are in contact with the housing 20. Assuming that the opening of the second seal having a V-shaped cross section is open toward the rotor 30, the second seal is in contact with the housing 20 at one folded end. The more contact points between the second seal and the housing 20, the better the sealing performance between the second seal and the housing 20. Thus, the sealing device 40 can improve the sealing performance between the second seal 60 and the housing 20 compared to the case where the opening is open toward the rotor 30.

[0150] The second sealing portion 60 of the sealing device 40 has opening ends 64 arranged in the axial direction with respect to each other. In the case where the radial positions of the two opening ends are offset, the friction force between one opening end and the housing 20 is greater than the friction force between the other opening end and the housing 20 according to the size of the offset, so the assemblability of the sealing device is deteriorated. On the other hand, in the case where the two opening ends 64 are arranged in the axial direction, the radial position offset of the two opening ends is small. Therefore, the difference in friction force between the various opening ends 64 and the housing 20 generated when the sealing device 40 is assembled becomes smaller. As a result, the assemblability of the sealing device 40 can be improved compared with the case where the radial positions of the two opening ends 64 are offset.

[0151] A gap S1 is formed between the groove portion 54 and the curved portion 62 of the sealing device 40. Therefore, the curved portion 62 can be bent toward the gap S1 when bent in a cross-sectional view. Thus, the sealing device 40 can be bent toward the gap S1 when the second sealing portion 60 is assembled.

[0152] The second sealing portion 60 has a space 60b adjacent to the curved portion 62 in cross-sectional view and provided on the cross-sectional center side of the curved portion 62. Therefore, the curved portion 62 can bend toward the space 60b when it is bent in cross-sectional view. Thus, the sealing device 40 can bend the second sealing portion 60 toward the space 60b when assembled.

[0153] It should be noted that the sealing structure 10 can also be assembled by assembling the rotor 30 to the inner peripheral surface 51a of the sealing device 40 after the sealing device 40 is assembled to the housing 20. In this case, the radial component of the reaction force (elastic force) transmitted from the second sealing portion 60 to the first sealing portion 50 is small, so the increase in the axial force generated by the first sealing portion 50 accompanying the assembly of the housing 20 is smaller than that of the sealing structure 10H of the comparative example. That is, in this case, the friction force between the first sealing portion 50 and the rotor 30 generated accompanying the assembly with the rotor 30 is smaller than that of the sealing structure 10H of the comparative example. Therefore, the sealing structure 10 can improve the assembly performance of the rotor 30 when the rotor 30 is assembled to the inner peripheral surface 51a of the sealing device 40 after the sealing device 40 is assembled to the housing 20.

[0154] (2) Second Embodiment

[0155] Next, the sealing structure 210 of the second embodiment is described with reference to the accompanying drawings. It should be noted that in this description, when the same components as those used in the above-mentioned embodiment are used, the reference numerals and names of the components are directly used for description. In the following description, repeated descriptions of the same structures as those in the above-mentioned embodiment are omitted.

[0156] like Fig. 9As shown, the sealing structure 210 has a sealing device 240 instead of the sealing device 40 in the first embodiment.

[0157] The sealing device 240 includes a second sealing portion 260 instead of the second sealing portion 60 in the first embodiment.

[0158] <Second sealing portion 260>

[0159] like Fig. 9 As shown, the second sealing portion 260 has a V-shaped cross section. The V-shaped cross section of the second sealing portion 260 has a thickness. The cross section of the second sealing portion 260 is open toward the rotor 30 side. That is, the second sealing portion 260 has an opening portion 260a. The opening portion 260a is open toward the rotor 30 side. The second sealing portion 260 has two opening ends 264 and a folded end 266 when viewed in cross section. In addition, the second sealing portion 260 has a bent portion 262.

[0160] The second seal 260 is mounted on the first seal 50 so that the two opening ends 264 are in contact with the groove bottom 54a of the groove 54. At this time, a gap S2 is formed between the second seal 260 and the groove wall 54b. In other words, a gap S2 is formed between the curved portion 262 and the groove 54.

[0161] In the second seal portion 260 mounted in the groove portion 54, the folded end 266 is brought into contact with the housing 20. The folded end 266 is an example of an outer end portion. The bent portion 262 is configured to include the folded end 266.

[0162] The second sealing portion 260 has a space 260b sandwiched between two open ends 264. The space 260b is adjacent to the curved portion 262 in cross-sectional view. The space 260b is located closer to the center of the cross section than the curved portion 262 in cross-sectional view.

[0163] <Assembly Method of Sealing Structure 210>

[0164] Next, an example of a method of assembling the sealing structure 210 will be described.

[0165] First, the first seal portion 50 is assembled to the rotor 30. Then, the second seal portion 260 is fitted to the groove portion 54 of the first seal portion 50 assembled to the rotor 30. That is, the sealing device 240 is assembled to the rotor 30.

[0166] Then, the housing 20 is assembled by moving the housing 20 relative to the sealing device 240 from the outside in the axial direction toward the sealing device 240 (see Fig.10 ).

[0167] like Fig.10As shown in (a), first, the folded end 266 contacts the edge of the housing 20. At this time, in the cross-sectional view, a moment in the moving direction of the housing 20 is applied to the bent portion 262 including the folded end 266. At this time, a fitting force from the housing 20 toward the groove bottom 54a is applied to the second sealing portion 260 assembled in the groove portion 54. At this time, the first bent portion 262, which is located on the housing 20 side relative to the second sealing portion 260 in the axial direction, is in a bent state.

[0168] Then, if Fig.10 (b) and Fig.10 As shown in (c), the fitting force applied to the second sealing portion 260 is further increased by further relative movement of the housing 20 with respect to the sealing device 240. At this time, the curved portion 262 on the opposite side to the first curved portion 262 sandwiching the opening 260a is in a curved state.

[0169] Except for the above aspects, the sealing structure 210 is the same structure as the sealing structure 10 .

[0170] Next, the operation and effects of the second embodiment will be described.

[0171] The opening 260a of the second seal 260 is open toward the rotor 30. That is, in the second seal 260, one folded end 266 is in contact with the housing 20. Therefore, the friction force generated between the second seal 260 and the housing 20 during assembly is smaller than when the opening is opened toward the housing 20. Thus, the sealing device 240 can be more easily assembled than when the opening is opened toward the housing 20.

[0172] (3) Third Embodiment

[0173] Next, the sealing structure 310 of the third embodiment is described with reference to the accompanying drawings. It should be noted that in this description, when the same components as those used in the above-mentioned embodiment are used, the reference numerals and names of the components are directly used for description. In the following description, repeated descriptions of the same structures as those in the above-mentioned embodiment are omitted.

[0174] like Fig.11 As shown, the sealing structure 310 has a sealing device 340 instead of the sealing device 40 in the first embodiment.

[0175] The sealing device 340 includes a second sealing portion 360 instead of the second sealing portion 60 in the first embodiment.

[0176] <Second sealing portion 360>

[0177] like Fig.11As shown, the second sealing portion 360 has a hollow annular cross section. The annular cross section of the second sealing portion 360 has a thickness. The second sealing portion 360 has an outer edge. In addition, the second sealing portion 360 has a curved portion 362. It should be noted that the second sealing portion 360 does not have an opening when observed in cross section. The second sealing portion 360 has a space 360b on the inner side of the annular cross section. The space 360b is adjacent to the curved portion 362 when observed in cross section. The space 360b is located at a position closer to the center of the cross section than the curved portion 362 when observed in cross section.

[0178] Except for the above aspects, the sealing structure 310 is the same structure as the sealing structure 10 .

[0179] The sealing structure 310 and the sealing device 340 have the same effects as the sealing structure 10 and the sealing device 40 except for the effects caused by the openings.

[0180] (4) Fourth Embodiment

[0181] Next, the sealing structure 410 of the fourth embodiment is described with reference to the accompanying drawings. It should be noted that in this description, when the same components as those used in the above-mentioned embodiments are used, the reference numerals and names of the components are directly used for description. In the following description, repeated descriptions of the same structures as those in the above-mentioned embodiments are omitted.

[0182] like Fig.12 As shown, the sealing structure 410 has a sealing device 440 instead of the sealing device 40 in the first embodiment.

[0183] The sealing device 440 includes a second sealing portion 460 instead of the second sealing portion 60 in the first embodiment.

[0184] <Second sealing portion 460>

[0185] like Fig.12 As shown, the second sealing portion 460 has a C-shaped cross section. The C-shaped cross section of the second sealing portion 460 has a thickness. The second sealing portion 460 has an opening portion 460a. The opening portion 460a opens toward the groove wall 54b when viewed in cross section. The second sealing portion 460 has two opening ends 464 when viewed in cross section. In addition, the second sealing portion 460 has a curved portion 462. The second sealing portion 460 has an outer edge end. The second sealing portion 460 has a space 460b on the inner side of the C-shaped cross section. The space 460b is adjacent to the curved portion 462 when viewed in cross section. The space 460b is located closer to the center of the cross section than the curved portion 462 when viewed in cross section.

[0186] Except for the above aspects, the sealing structure 410 is the same structure as the sealing structure 10 .

[0187] The sealing structure 410 and the sealing device 440 perform the same effects as the sealing structure 210 and the sealing device 240 .

[0188] (5) Fifth Embodiment

[0189] Next, the sealing structure 510 of the fifth embodiment is described with reference to the accompanying drawings. It should be noted that in this description, when the same components as those used in the above-mentioned embodiments are used, the reference numerals and names of the components are directly used for description. In the following description, repeated descriptions of the same structures as those in the above-mentioned embodiments are omitted.

[0190] like Fig.13 As shown, the sealing structure 510 has a sealing device 540 instead of the sealing device 40 in the first embodiment.

[0191] The sealing device 540 includes a second sealing portion 560 instead of the second sealing portion 60 in the first embodiment.

[0192] <Second sealing portion 560>

[0193] like Fig.13 As shown, the second sealing portion 560 has a substantially solid circular cross section. The second sealing portion 560 has an opening portion 560a that is formed in a concave shape relative to the outer periphery of the second sealing portion 560 when viewed in cross section. The opening portion 560a is formed in a slit shape extending from the outer periphery of the cross section of the second sealing portion 560 toward the center of the cross section. The opening portion 560a opens toward the groove wall 54b when viewed in cross section. The second sealing portion 560 has two opening ends 564 when viewed in cross section. In addition, the second sealing portion 560 has a bent portion 562. The bent portion 562 is included in a portion where the distance between the inner portion of the opening portion 560a and the outer periphery of the second sealing portion 560 is the shortest when viewed in cross section. The second sealing portion 560 has an outer edge end.

[0194] Except for the above aspects, the sealing structure 510 is the same structure as the sealing structure 10 .

[0195] The sealing structure 510 and the sealing device 540 perform the same effects as the sealing structure 210 and the sealing device 240 .

[0196] (6) Sixth Embodiment

[0197] Next, the sealing structure 610 of the sixth embodiment of the present invention is described with reference to the accompanying drawings. It should be noted that in this description, when the same components as those used in the above-mentioned embodiments are used, the reference numerals and names of the components are directly used for description. In the following description, repeated descriptions of the same structures as those in the above-mentioned embodiments are omitted.

[0198] like Fig.14 As shown, the sealing structure 610 has a sealing device 640 instead of the sealing device 40 in the first embodiment.

[0199] The sealing device 640 has a first sealing portion 650 and a second sealing portion 660 .

[0200] <First sealing portion 650>

[0201] The first sealing portion 650 has a groove portion 654 instead of the groove portion 54 in the first embodiment. Fig.14 As shown, the groove portion 654 is formed into a V-shape when viewed in section. The groove portion 654 has an inner end portion 654a and a pair of inclined surfaces 654b. The inner end portion 654a is an end portion on one side that is curved in a V-shape when viewed in section. The pair of inclined surfaces 654b are open toward the housing 20 side. Each inclined surface 654b is linearly inclined in a direction intersecting with the radial direction when viewed in section. The pair of inclined surfaces 654b has radial symmetry with respect to the first sealing portion 650.

[0202] <Second sealing portion 660>

[0203] like Fig.14 As shown, the second sealing portion 660 has a substantially solid circular cross section. That is, the second sealing portion 660 does not have an opening, a curved portion, and an open end. In addition, the second sealing portion 660 does not have a structure that can be bent during assembly. The second sealing portion 660 is assembled to the first sealing portion 650 while contacting a pair of inclined surfaces 654b of the groove portion 654.

[0204] When the second sealing portion 660 is assembled to the first sealing portion 650 and is not assembled to the housing 20 , a gap S6 is formed between the second sealing portion 660 and the inner end portion 654 a .

[0205] Except for the above aspects, the sealing structure 610 is the same structure as the sealing structure 10 .

[0206] The second sealing portion 660 assembled on the first sealing portion 650 generates a reaction force (elastic force) corresponding to the fitting force given from the housing 20 during assembly. At this time, the second sealing portion 660 contacts a pair of inclined surfaces 654b. Therefore, the reaction force (elastic force) generated in the second sealing portion 660 acts on the first sealing portion 650 via the groove portion 654 in a direction opposite to the normal direction of each of the pair of inclined surfaces 654b. Thus, the radial component of the reaction force (elastic force) of the first sealing portion 650 transmitted from the second sealing portion 660 to the sealing structure 610 during assembly is smaller than that of the sealing structure 10H of the comparative example. Thus, the sealing device 640, due to the groove portion 654, can reduce the radial component of the reaction force (elastic force) transmitted from the second sealing portion 660 to the first sealing portion 650 during assembly.

[0207] In addition, the sealing structure 610 equipped with the sealing device 640 can achieve the same effect as the sealing structure 10 .

[0208] When not assembled, a gap S6 is formed between the inner end portion 654a and the second sealing portion 660. At this time, the second sealing portion 660 is deformed toward the gap S6 in a smaller manner than when the area of ​​the gap S6 is not pressed by the housing 20 during assembly, while showing a behavior unique to the elastomer. That is, the second sealing portion 660 can be deformed toward the gap S6 during assembly. In this way, in the second sealing portion 60 assembled to the first sealing portion 650, a part of the fitting force applied from the housing 20 during assembly is used for deformation toward the gap S6 of the second sealing portion 60. Thus, since the sealing device 640 has the gap S6, it is possible to reduce the reaction force (elastic force) generated in the second sealing portion 60 due to the pressing force from the housing 20 during assembly.

[0209] The pair of inclined surfaces 654b are symmetrical in the radial direction of the first sealing portion 650. At this time, the forces generated between the pair of inclined surfaces 654b and the second sealing portion 660 during assembly cancel each other in the axial direction. Therefore, the second sealing portion 660 is not easily offset from the groove portion 654 in the axial direction during assembly. As a result, the sealing device 640 can improve assembly performance.

[0210] (6) Seventh Embodiment

[0211] Next, the sealing structure 710 of the seventh embodiment of the present invention is described with reference to the accompanying drawings. It should be noted that in this description, when the same components as those used in the above-mentioned embodiments are used, the reference numerals and names of the components are directly used for description. In the following description, repeated descriptions of the same structures as those in the above-mentioned embodiments are omitted.

[0212] like Fig.15As shown, the sealing structure 710 has a sealing device 740 instead of the sealing device 40 in the first embodiment.

[0213] The sealing device 740 has a first sealing portion 750 instead of the first sealing portion 50 in the first embodiment. It should be noted that the sealing device 740 has a second sealing portion 60 in the first embodiment. That is, the second sealing portion 60 of the sealing device 740 has a bending portion 62 that can be bent during assembly. In addition, the second sealing portion 60 of the sealing device 740 has a folded end 66.

[0214] The sealing device 740 may include any one of the second sealing portions 260 , 360 , 460 , and 560 instead of the second sealing portion 60 .

[0215] <First sealing portion 750>

[0216] The first sealing portion 750 has a groove portion 754 instead of the groove portion 54 in the first embodiment. The groove portion 754 is the same as the groove portion 654 in the sixth embodiment. Fig.15 As shown, the groove portion 754 is formed into a V-shape when viewed in cross section. The groove portion 754 has an inner end portion 754a and a pair of inclined surfaces 754b. The pair of inclined surfaces 754b are open toward the housing 20 side. Each inclined surface 754b is linearly inclined in a direction intersecting with the radial direction when viewed in cross section. The pair of inclined surfaces 754b has radial symmetry with respect to the first sealing portion 750.

[0217] The second seal portion 60 is mounted on the first seal portion 750 while being in contact with the pair of inclined surfaces 754 b of the groove portion 754 .

[0218] The second seal portion 60 is attached to the first seal portion 750 so that the folded end 66 contacts the pair of inclined surfaces 754b. At this time, a gap S7 is formed between the bent portion 62 and the pair of inclined surfaces 754b.

[0219] When the second sealing part 60 is assembled to the first sealing part 750 and not assembled to the housing 20, a gap S7a is formed between the second sealing part 60 and the inner end 754a. That is, when not assembled, a gap S7a is formed between the inner end 754a and the second sealing part 760.

[0220] Except for the above aspects, the sealing structure 610 is the same structure as the sealing structure 10 .

[0221] The second sealing portion 60 of the sealing device 740 has a bent portion 62 that can be bent during assembly. Thus, the sealing device 740 can further reduce the amount of deformation of the first sealing portion 750 during assembly.

[0222] A gap S7 is formed between the groove portion 754 of the sealing device 740 and the curved portion 62. Therefore, the curved portion 62 can be bent toward the gap S7. Thus, when the second sealing portion 60 is assembled in the groove portion 754 having the pair of inclined surfaces 754b, the sealing device 740 can be bent toward the gap S7 during assembly.

[0223] As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above-described embodiments, and various modifications, changes, and improvements can be made within the scope of the technical concept of the present invention.

[0224] For example, Figure 5 , Figure 6 , Fig. 9 , Fig.10 , Fig.12 , Fig.13 , Fig.15 As shown, the opening of the second sealing portion opens in a radial or axial direction along the first sealing portion. However, the opening of the second sealing portion of the present invention may also open in a direction inclined relative to the radial and / or axial direction of the first sealing portion.

[0225] The grooves 654 and 754 of the sixth and seventh embodiments are formed in a V-shape in cross-sectional view. However, the groove having a pair of inclined surfaces of the present invention has a groove bottom sandwiched by a pair of inclined surfaces, and may further have a groove bottom parallel to the outer peripheral surface of the first sealing portion.

[0226] The first sealing portion 50 of the first embodiment extends from the cylindrical outer peripheral surface 51b along the groove wall 54b. However, the first sealing portion 50 may also be Fig.16 The present invention has a protrusion 57 around the groove 54. The protrusion 57 is formed in a rib shape along the groove 54. That is, the first sealing portion of the present invention may have a rib-shaped protrusion around the groove.

[0227] The second sealing portion 60 of the first embodiment is bent in a manner to close the opening 60a. However, the second sealing portion of the sealing device of the present invention may be bent in a manner to open the opening. Specifically, the sealing device of the present invention may be, for example, the sealing device A40 (see Fig.17 ).

[0228] like Fig.18 As shown, the second sealing portion of the present invention may be a second sealing portion 860 having a spiral cross-sectional shape. The second sealing portion 860 has a buckling portion 862, a space 860a, and an opening 860b.

[0229] The second sealing portion 60 of the first embodiment may also be Fig.19Specifically, the second sealing portion 60 may be configured as follows: Fig.19 As shown in (a), when viewed in cross section, a portion of the space 60b side at the portion extending from the folded end 66 to the open end 64 has a cutout 69. It should be noted that the second sealing portion 60 may also have a fold instead of the cutout 69. The cutout 69 or the fold preferably extends in the direction in which the cross section of the second sealing portion 60 extends. The cutout 69 or the fold may also extend in a straight line in a manner intersecting with the direction in which the cross section of the second sealing portion 60 extends.

[0230] Description of Reference Numerals

[0231] CA: Central Axis

[0232] 10: Sealed structure

[0233] 20: Shell

[0234] 20b: Inner circumference

[0235] 30: Rotor

[0236] 40: Sealing device

[0237] 50: First sealing part

[0238] 51: Main body

[0239] 51p: Port

[0240] 51b: Outer surface

[0241] 51a: Inner circumference

[0242] 54: Groove

[0243] 54a: Groove bottom

[0244] 60: Second sealing part

[0245] 60a: Opening

[0246] 62: Bend

[0247] 64: Open end

[0248] S1: Gap

[0249] 210: Sealed structure

[0250] 240: Sealing device

[0251] 260: Second sealing part

[0252] 260a: Opening

[0253] 262: Bend

[0254] 264: Open end

[0255] S2: Gap

[0256] 310: Sealed structure

[0257] 340: Sealing device

[0258] 360: Second sealing part

[0259] 362: Bend

[0260] 410: Sealed structure

[0261] 440: Sealing device

[0262] 460: Second sealing part

[0263] 460a: Opening

[0264] 462: Bend

[0265] 464: Open end

[0266] 510: Sealed structure

[0267] 540: Sealing device

[0268] 560: Second sealing part

[0269] 560a: Opening

[0270] 562: Bend

[0271] 564: Open end

[0272] 610: Sealed structure

[0273] 640: Sealing device

[0274] 650: First sealing part

[0275] 654: Groove

[0276] 654a: Groove depth

[0277] 654b: Inclined surface

[0278] 660: Second sealing part

[0279] S6: Clearance

[0280] 710: Sealed structure

[0281] 740: Sealing device

[0282] 760: Second sealing part

[0283] 760a: Opening

[0284] 762: Bend

[0285] 764: Open end

[0286] S7: Gap

[0287] S7a: Gap

Claims

1. A sealing device assembled between a cylindrical housing and a rotor coaxially arranged inside the housing and rotating around an axis, wherein: The sealing device comprises a first sealing portion and a second sealing portion, The second sealing portion has a main body portion along the outer diameter portion of the rotor, and has: A port portion radially penetrating through the main body portion; and a groove portion formed on the outer peripheral surface of the main body portion so as to surround the port portion when viewed from the radial outer peripheral surface side, the groove portion having a pair of inclined surfaces opened toward the housing side, The second sealing portion is mounted in the groove portion to seal between the housing and the second sealing portion, and the second sealing portion is in contact with the pair of inclined surfaces.

2. The sealing device according to claim 1, wherein: The groove portion has a groove depth, A first gap is formed between the groove deep portion and the second sealing portion, The second sealing portion can be deformed toward the first gap during assembly.

3. The sealing device according to claim 2, wherein: The second sealing portion is formed of an elastomer.

4. The sealing device according to claim 1 or 2, wherein: The pair of inclined surfaces has symmetry in the radial direction of the second sealing portion.

5. The sealing device according to any one of claims 1 to 3, wherein: The second sealing portion has a buckling portion that can be buckled during assembly.

6. The sealing device according to claim 5, wherein: A second gap is formed between the pair of inclined surfaces and the buckling portion.

7. A sealing device assembled between a cylindrical housing and a rotor coaxially arranged inside the housing and rotating around an axis, wherein: The sealing device comprises a first sealing portion and a second sealing portion, The second sealing portion has a main body portion along the outer diameter portion of the rotor, and has: A port portion radially penetrating through the main body portion; A groove portion is formed on the outer peripheral surface of the main body portion in a manner surrounding the port portion when viewed from the outer peripheral surface side of the radial direction, the groove portion having a pair of inclined surfaces and a groove depth portion, the pair of inclined surfaces being linearly inclined in a direction intersecting with the radial direction when viewed in cross section, The second sealing portion is mounted in the groove portion to seal between the housing and the first sealing portion, and the second sealing portion is in contact with the pair of inclined surfaces. The groove deep portion forms a first gap between the groove deep portion and the second sealing portion. The second sealing portion is deformable toward the first gap during assembly.

8. A sealing structure, wherein: have: A cylindrical shell; a rotor coaxially arranged inside the housing and rotating around an axis; and The sealing device according to any one of claims 1 to 7.

9. A method for assembling a sealing structure, wherein: The sealing device according to any one of claims 1 to 7 is assembled into a cylindrical housing, A rotor is assembled to an inner peripheral surface on the opposite side of the outer peripheral surface of the sealing device assembled to the housing.

10. A method for assembling a sealing structure, wherein: The sealing device according to any one of claims 1 to 7 is assembled to a rotor, A cylindrical housing is assembled in the sealing device assembled to the rotor.

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