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US20020182072A1 - Seal device - Google Patents

Seal device Download PDF

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Publication number
US20020182072A1
US20020182072A1 US10/158,289 US15828902A US2002182072A1 US 20020182072 A1 US20020182072 A1 US 20020182072A1 US 15828902 A US15828902 A US 15828902A US 2002182072 A1 US2002182072 A1 US 2002182072A1
Authority
US
United States
Prior art keywords
seal device
base member
seal
elastic member
retainer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/158,289
Other languages
English (en)
Inventor
Takayuki Kato
Masahiro Kawaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI reassignment KABUSHIKI KAISHA TOYOTA JIDOSHOKKI ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KATO, TAKAYUKI, KAWAGUCIH, MASAHIRO
Publication of US20020182072A1 publication Critical patent/US20020182072A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1081—Casings, housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3228—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip formed by deforming a flat ring

Definitions

  • the present invention relates to a seal device and more particularly to a lip seal for sealing a gap around a drive shaft of a compressor for use in an air conditioner and a gasket for sealing a joint between housing members
  • Japanese Unexamined Utility Model publication No.5-30637 discloses one of seal devices.
  • the seal device has a base member, or a housing of an oil seal, and an elastic member, or a lip seal made of rubber.
  • the base member is made of a metal plate.
  • the end of the elastic member is fixed to the base member with a reinforcement member and another seal member made of synthetic resin by caulking or by bending the part of base member.
  • the elastic member Since the elastic member is pliant and easily deforms, generally the end of the elastic member fixedly adheres to the base member by means of an adhesive material.
  • a seal device has a base member and an elastic member.
  • the elastic member adheres to the base member so as to cover substantially the entire surface of the base member without any adhesive material.
  • FIG. 1 is a partially schematic view of a lip seal according to a first embodiment of the present invention
  • FIG. 2 is a partially schematic view of a lip seal according to a second embodiment of the present invention.
  • FIG. 3A is a partially cross-sectional view of an annular base according to another embodiment of the present invention.
  • FIG. 3B is a partially cross-sectional view taken along the line I-I in FIG. 3A;
  • FIG. 4A is a partially cross-sectional view of a compressor with a gasket
  • FIG. 4B is a partially enlarged schematic cross-sectional view of the gasket.
  • FIG. 4C is an end view of the gasket.
  • FIG. 1 A first embodiment of the present invention will now be described with reference to FIG. 1.
  • the front side and the rear side correspond to the left side and the right side in FIG. 1, respectively.
  • an annular retainer 12 , a first seal member 13 , a second seal member 14 and a back-up ring 15 constitute a lip seal 11 .
  • the retainer 12 or a base member is made of a metal plate.
  • the first seal member 13 or an elastic member is made of rubber.
  • the second seal member 14 is made of synthetic resin.
  • the back-up ring 15 or a reinforcement member is made of a metal plate.
  • the first seal member 13 is made of synthetic rubber such as acrylonitrile butadiene rubber, and is annular in shape. Besides, the spring hardness Hs of the synthetic rubber is preferably 75 or above based on stability of shape, and is more preferably 80 or above, and is much more preferably 85 or above.
  • the second seal member 14 is made of fluororesin such as polytetrafluoroethylene (PTFE), and is annular in shape.
  • the cross section of the back-up ring 15 is substantially L-shaped, and the back-up ring 15 is constituted of a cylindrical portion 15 A and an extended portion 15 B, which extends from the rear end of the cylindrical portion 15 A toward the central axis of the lip seal 11 .
  • the cross section of the retainer 12 is substantially U-shaped.
  • the retainer 12 includes a cylindrical portion 12 A, an annular front extended portion 12 B and an annular rear extended portion 12 C.
  • the cylindrical portion 12 A includes a cylindrical surface along the direction of the central axis of the retainer 12 .
  • the front extended portion 12 B and the rear extended portion 12 C respectively extend from the front end of the cylindrical portion 12 A and the rear end of the cylindrical portion 12 A toward the central axis of the retainer 12 .
  • Substantially the entire surface of the retainer 12 is formed within the first seal member 13 by insert mold. Strictly, in the retainer 12 , the entire surface of the cylindrical portion 12 A, the entire surface of the rear extended portion 12 C and the front end of the front extended portion 12 B are covered with the elastic member, which constitutes the first seal member 13 . The first seal member 13 adheres to the retainer 12 without any adhesive material.
  • a plurality of through holes 12 D is formed to extend through the retainer 12 in thickness.
  • the elastic member which constitutes the first seal member 13 , occupies the through holes 12 D, and the elastic member on each side of the retainer 12 interconnects through the through holes 12 D.
  • the first seal member 13 includes an annular base 13 A and an annular lip portion 13 B.
  • the base 13 A accommodates the retainer 12 .
  • the lip portion 13 B extends from the base 13 A.
  • Parts of outer peripheries of the back-up ring 15 and the second seal member 14 are respectively accommodated in front and rear in a space surrounded by the part of first seal member 13 covering the inner surface (the lower surface in FIG. 1) of the cylindrical portion 12 A and the front end surface of the rear extended portion 12 C and also by the front extended portion 12 B of the retainer 12 .
  • a protrusion is formed on the front surface of the rear extended portion 12 C of the first seal member 13 .
  • the second seal member 14 and the back-up ring 15 are fixedly caulked such that the protrusion and the front extended portion 12 B sandwich the second seal member 14 and the back-up ring 15 .
  • the second seal member 14 and the back-up ring 15 are assembled to the retainer 12 and the first seal member 13 without any adhesive material such that the second seal member 14 and the back-up ring 15 can be disassembled from the retainer 12 and the first seal member 13 .
  • a sliding surface 14 A of the second seal member 14 with respect to a rotary shaft 16 provides a spiral groove 14 B, which functions to return lubricant oil to a sealed region A.
  • the lip seal 11 is installed to a compressor such that a protrusion formed on the base 13 A abuts against the inner surface of a seal chamber 18 , which is defined in a housing 17 of the compressor. Also, the lip seal 11 is supported by the housing 17 , and is assembled to the compressor such that the end of the lip portion 13 B of the first seal member 13 and the sliding surface 14 A of the second seal member 14 abut against the outer circumferential surface of the rotary shaft 16 , which is inserted through the seal members 13 , 14 .
  • the protrusions respectively formed on the outer periphery of the base 13 A and on the first seal member 13 covering the front surface of the rear extended portion 12 C ensure relatively high sealing performance. Therefore, no elastic member is interposed between the front end of the cylindrical portion 15 A and the rear surface of the front extended portion 12 B. Nevertheless, sealing performance of the lip seal 11 is not deteriorated.
  • the first seal member 13 adheres to substantially the entire surface of the retainer 12 without any adhesive material. Thereby, the first seal member 13 is easily removed from the retainer 12 . Therefore, the first seal member 13 and the retainer 12 are easily recycled.
  • the retainer 12 is made of metal plate. Therefore, relatively high heat-resistance of the base member is easily ensured. For example, the retainer 12 made of metal plate is inhibited from deforming under conditions of relatively high temperature, as compared with the retainer 12 made of resin. Thereby, the retainer 12 made of metal plate tends to be utilized under conditions of relatively high temperature. In addition, in view of gas permeation performance, the retainer 12 made of metal is more efficient than that made of resin.
  • the first seal member 13 is formed by insert mold. Thereby, the lip seal 11 is easily mass-produced. Namely, manufacturing cost is reduced.
  • the retainer 12 forms the plurality of through holes 12 D, which extends in thickness, and the first seal member 13 formed on each side of the retainer 12 interconnects through the through holes 12 D. Thereby, the first seal member 13 is inhibited from being removed.
  • FIG. 2 A second embodiment of the present invention will now be described with reference to FIG. 2.
  • the front side and the rear side correspond to the left side and the right side in FIG. 2, respectively.
  • the structure of the lip seal in the first embodiment is modified in the second embodiment.
  • the structure other than the lip seal is similar to that in the first embodiment. Therefore, only the structure different from that in the first embodiment will be described.
  • the same reference numerals denote the similar components to those in the first embodiment.
  • An annular case 21 , a first seal member 22 , a second seal member 23 and a back-up ring 24 constitute a lip seal 20 .
  • the annular case 21 is made of metal plate.
  • the first seal member 22 or an elastic member is made of rubber.
  • the second seal member 23 is made of resin.
  • the back-up ring 24 or a reinforcement member is made of metal.
  • the first seal member 22 is made of synthetic rubber such as acrylonitrile butadiene rubber, and is annular in shape.
  • the second seal member 23 is made of fluororesin such as polytetrafluoroethylene PTFE, and is annular in shape.
  • the back-up ring 24 is annular disk-shaped.
  • the cross section of the case 21 is substantially S-shaped.
  • the case 21 includes an outer cylindrical portion 21 A or an outermost outside diameter portion, which includes a cylindrical surface along the direction of the central axis of the case 21 .
  • An annular front extended portion 21 B and an annular rear extended portion 21 C respectively extend from the front end and the rear end of the outer cylindrical portion 21 A.
  • an annular O-ring case 21 D extends frontward from the radially inner end of the front extended portion 21 B.
  • the parts of outer peripheries of the back-up ring 24 , the second seal member 23 and the first seal member 22 are accommodated in order from the front side in a reentrant 21 E, which is formed by the outer cylindrical portion 21 A, the front and the rear extended portions 21 B, 21 C.
  • the first and the second seal members 22 , 23 and the back-up ring 24 are fixedly caulked such that the front and the rear extended portions 21 B, 21 C sandwich the first and the second seal members 22 , 23 and the back-up ring 24 .
  • the first and the second seal members 22 , 23 and the back-up ring 24 are assembled to the case 21 without any adhesive material such that the first and the second seal members 22 , 23 and the back-up ring 24 can be disassembled from the case 21 .
  • An annular retainer 25 or a base member made of metal plate is covered with the first seal member 22 by insert mold, and is arranged in the first seal member 22 adjacent to the outer periphery.
  • the part of retainer 25 is arranged to receive force due to caulking.
  • a plurality of through holes 25 A is formed to extend through the retainer 25 in thickness (the front and the rear direction in FIG. 2).
  • the elastic member constituting the first seal member 22 occupies the through holes 25 A.
  • the elastic member formed on each side of the retainer 25 interconnects through the through holes 25 A. Therefore, the first seal member 22 adheres to the retainer 25 without any adhesive material.
  • a sliding surface 23 A of the second seal member 23 with respect to the rotary shaft 16 forms a spiral groove 23 B, which functions to return lubricant oil to the sealed region A.
  • An O-ring 26 is fitted in an annular reentrant, which is formed by the front extended portion 21 B and the O-ring case 21 D.
  • the O-ring 26 seals a gap between the wall surface of the seal chamber 18 and the outer periphery of the case 21 , and the end of the first seal member 22 and the sliding surface 23 A of the second seal member 23 close to the outer circumferential surface of the rotary shaft 16 . Thereby, a gap around the rotary shaft 16 is sealed.
  • the part of retainer 25 is arranged to receive force due to caulking.
  • the elastic member of the first seal member 22 on each side of the retainer 25 is relatively thin, pressure applied to the elastic member of the first seal member 22 by caulking tends to be relatively large. Therefore, sealing performance on the elastic member of the first seal member 22 on each side of the retainer 25 improves.
  • the base member or the retainer 12 , 25 forms the through holes 12 D, 25 A, which extend in thickness.
  • the elastic member or the first seal member 13 , 22 formed on each side of the base member interconnects through the through holes 12 D, 25 A.
  • grooves may be recessed such that the elastic members formed on each side of the base member respectively occupy the grooves, as shown in FIGS. 3A, 3B.
  • a plurality of grooves 41 (only one groove on each side of the base member shown in FIG. 3) in place of the through holes 12 D is recessed on each side of a retainer 40 .
  • each groove 41 is wider than the opening, and the cross section of each groove 41 is substantially rectangular in shape, as shown in FIG. 3B.
  • the grooves 41 continuously extend from the radially inner end of the front extended portion 40 A toward the radially inner end of the rear extended portion 40 B on the front extended portion 40 A and the rear extended portion 40 B, respectively. In such a state, even when the elastic member adheres to the surface of the retainer 40 without any adhesive material, the part of elastic member occupies the grooves 41 . Thereby, the elastic member is inhibited from being removed from the retainer 40 .
  • the base member or the retainer 12 , 25 may form the through holes, which extend in thickness, and the grooves, which are occupied by the part of elastic member, on each side of the base member.
  • a through hole 12 D, 25 A formed through the base member or the retainer 12 , 25 may be omitted.
  • the spiral groove 14 B, 23 B formed on the second seal member may be omitted.
  • the elastic member or the first seal member 13 , 22 is formed by insert mold.
  • the elastic member may adhere to the base member or the retainer 12 , 25 by a process other than insert mold.
  • the base members 12 , 25 are made of plate material.
  • the base members may be made of material other than the plate material.
  • a retainer made of a wire rod the cross section of which is rectangular or circular in shape, may be utilized in place of the retainer 25 made of metal plate.
  • the above-mentioned structure of the seal device may be applied to a gasket.
  • the structure is applied to a gasket 33 of a valve plate assembly 32 , which is interposed between a rear housing 31 and a cylinder block 30 in a compressor, as shown in FIG. 4A.
  • the gasket 33 is constituted of a metal plate 34 or a base member and a rubber layer 35 or an elastic member formed on the surface of the metal plate 34 .
  • the rubber layer 35 adheres to the metal plate 34 without any adhesive material.
  • a plurality of through holes 34 A is formed to extend through the metal plate 34 in thickness, and the rubber layer 35 formed on each side of the metal plate 34 interconnects through the through holes 34 A.
  • FIG. 4A the structure is applied to a gasket 33 of a valve plate assembly 32 , which is interposed between a rear housing 31 and a cylinder block 30 in a compressor, as shown in FIG. 4A.
  • the gasket 33 is constituted of a metal plate 34 or a base member and
  • the gasket 33 forms a plurality of holes 37 so as to correspond to suction ports and discharge ports of a valve plate 36 , and also forms a plurality of through holes 38 for bolts.
  • the thickness of the rubber layer 35 is exaggerated, as compared with an actual thickness. According to the structure described above, the rubber layer 35 adheres to the metal plate 34 such that the rubber layer 35 can be easily removed from the metal plate 34 .
  • the base members 12 , 25 , 34 are made of metal.
  • the base members may be made of material other than metal.
  • the base members may be made of resin or fiberglass reinforced plastic (FRP).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressor (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Gasket Seals (AREA)
US10/158,289 2001-06-04 2002-05-30 Seal device Abandoned US20020182072A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-168607 2001-06-04
JP2001168607A JP2002364761A (ja) 2001-06-04 2001-06-04 シール材

Publications (1)

Publication Number Publication Date
US20020182072A1 true US20020182072A1 (en) 2002-12-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/158,289 Abandoned US20020182072A1 (en) 2001-06-04 2002-05-30 Seal device

Country Status (3)

Country Link
US (1) US20020182072A1 (de)
JP (1) JP2002364761A (de)
DE (1) DE10224175A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060269407A1 (en) * 2005-05-25 2006-11-30 Ab Skf Seal
US20070284831A1 (en) * 2006-06-09 2007-12-13 Ab Skf Compressor Shaft Seal
US20100170632A1 (en) * 2008-12-31 2010-07-08 Saint-Gobain Performance Plastics Corporation Multilayer polymeric articles and methods for making same
CN101809344A (zh) * 2008-05-15 2010-08-18 伊格尔工业股份有限公司 唇式密封件
CN102818031A (zh) * 2012-09-05 2012-12-12 重庆市嘉龙密封件制造有限公司 矿用无油自润滑油封
US9297457B2 (en) 2013-01-29 2016-03-29 Eagle Industry Co., Ltd. Sealing device
CN110397742A (zh) * 2012-08-23 2019-11-01 伊格尔工业股份有限公司 密封装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5016423B2 (ja) * 2007-09-14 2012-09-05 イーグル工業株式会社 リップタイプシール
JP4875597B2 (ja) * 2007-11-28 2012-02-15 イーグル工業株式会社 リップタイプシール

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838862A (en) * 1968-10-31 1974-10-01 Dowty Seals Ltd Seals for use between two relatively-rotating surfaces
US4614371A (en) * 1983-08-03 1986-09-30 Firma Carl Freudenberg Ring
US5055015A (en) * 1988-05-23 1991-10-08 Atsugi Motor Parts Company, Limited Seal structure for rotary body and vane-type rotary compressor employing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838862A (en) * 1968-10-31 1974-10-01 Dowty Seals Ltd Seals for use between two relatively-rotating surfaces
US4614371A (en) * 1983-08-03 1986-09-30 Firma Carl Freudenberg Ring
US5055015A (en) * 1988-05-23 1991-10-08 Atsugi Motor Parts Company, Limited Seal structure for rotary body and vane-type rotary compressor employing the same

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7670111B2 (en) * 2005-05-25 2010-03-02 Ab Skf Seal
US20060269407A1 (en) * 2005-05-25 2006-11-30 Ab Skf Seal
US8322726B2 (en) * 2006-06-09 2012-12-04 Ab Skf Compressor shaft seal
US20070284831A1 (en) * 2006-06-09 2007-12-13 Ab Skf Compressor Shaft Seal
US9163731B2 (en) 2008-05-15 2015-10-20 Eagle Industry Co., Ltd. Lip type seal
US20100244389A1 (en) * 2008-05-15 2010-09-30 Eagle Industry Co., Ltd. Lip type seal
CN101809344A (zh) * 2008-05-15 2010-08-18 伊格尔工业股份有限公司 唇式密封件
CN105782453A (zh) * 2008-05-15 2016-07-20 伊格尔工业股份有限公司 唇式密封件
US20140083604A1 (en) * 2008-12-31 2014-03-27 Saint-Gobain Performance Plastics Corporation Multilayer polymeric articles and methods for making same
US20100170632A1 (en) * 2008-12-31 2010-07-08 Saint-Gobain Performance Plastics Corporation Multilayer polymeric articles and methods for making same
CN110397742A (zh) * 2012-08-23 2019-11-01 伊格尔工业股份有限公司 密封装置
CN102818031A (zh) * 2012-09-05 2012-12-12 重庆市嘉龙密封件制造有限公司 矿用无油自润滑油封
US9297457B2 (en) 2013-01-29 2016-03-29 Eagle Industry Co., Ltd. Sealing device

Also Published As

Publication number Publication date
DE10224175A1 (de) 2003-04-30
JP2002364761A (ja) 2002-12-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KATO, TAKAYUKI;KAWAGUCIH, MASAHIRO;REEL/FRAME:013080/0494

Effective date: 20020528

STCB Information on status: application discontinuation

Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION