KR100890601B1 - Hydraulic Actuator Bushing - Google Patents

Hydraulic Actuator Bushing Download PDF

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Publication number
KR100890601B1
KR100890601B1 KR1020080020967A KR20080020967A KR100890601B1 KR 100890601 B1 KR100890601 B1 KR 100890601B1 KR 1020080020967 A KR1020080020967 A KR 1020080020967A KR 20080020967 A KR20080020967 A KR 20080020967A KR 100890601 B1 KR100890601 B1 KR 100890601B1
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South Korea
Prior art keywords
hydraulic actuator
bushing
ring
seal
dust seal
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KR1020080020967A
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Korean (ko)
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정환욱
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주식회사 에네스코
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/24—Brasses; Bushes; Linings with different areas of the sliding surface consisting of different materials
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/74—Sealings of sliding-contact bearings
    • F16C33/741—Sealings of sliding-contact bearings by means of a fluid
    • F16C33/743—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/30—Fluoropolymers
    • F16C2208/32—Polytetrafluorethylene [PTFE]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Sealing Devices (AREA)

Abstract

A hydraulic actuator bushing is provided to maintain stable sealing force to low pressure and high pressure by inserting an O-ring seal between a dust seal and a wear detector ring. A dust seal(311) cuts off leakage and foreign material of a piston rod part. A wear detector ring(313) is molded with PTFE powder and Graphite powder in order to offset lateral wheel pressure. A seal(312) is formed between the dust seal and the wear detector ring. The seal surrounds an O-ring, installed at a mounting groove, with fluoro-ethylene resin.

Description

유압엑츄에이터 부싱{.}Hydraulic Actuator Bushing {.}

본 발명은 발전소 터빈밸브 유압엑츄에이터에 사용되는 부싱(Bushing)에 관한 것이다.The present invention relates to bushings used in power plant turbine valve hydraulic actuators.

본 발명에 관한 부싱은 도 1에 도시한 바와 같이, 발전소 터빈밸브 유압엑츄에이터의 한 구성요소로서 속이 빈 원통형상으로 유압엑츄에이터의 체결플렌지와 로드(R) 사이에 장착되어 유압엑츄에이터 동작시 밀봉하는 등의 역할을 하는 부분이다.Bushing according to the present invention, as shown in Figure 1, as a component of the power plant turbine valve hydraulic actuator is a hollow cylindrical shape is mounted between the fastening flange of the hydraulic actuator and the rod (R) to seal during operation, etc. This is the part that plays a role.

한편, 종래의 유압엑츄에이터 부싱은 도 2에 도시한 바와 같이 그 내경에 더스트실(Dust Seal)(311')과 유팩킹실(U-Packing Seal)(312')이 구비되어 피스톤 로드부의 외부누설과 이물질 유입을 차단하며 유팩킹실에 대한 유압에 의하여 외부에 대하여 밀봉하는 기능을 하였다. Meanwhile, the conventional hydraulic actuator bushing is provided with a dust seal 311 'and an u-packing seal 312' at its inner diameter as shown in FIG. It prevents the inflow of foreign substances and seals the outside by hydraulic pressure to the milking room.

그러나 종래의 유압엑츄에이터 부싱은 과도한 운동시 마찰로 인한 실(Seal)이 손상 또는 이탈되는 문제가 빈번히 발생하는 한편, 오존, 열 또는 마찰에 의한 자체손상이 심한 문제점이 있었다. 또한, 유압엑츄에이터의 체결플렌지에 체결시 체결을 위한 마땅한 구성요소의 미비로 작업에 있어 어려움이 있었다. However, the conventional hydraulic actuator bushing frequently causes a problem that the seal is damaged or detached due to friction during excessive movement, and there is a serious problem of self damage due to ozone, heat or friction. In addition, there was a difficulty in working due to the lack of proper components for fastening when fastening to the fastening flange of the hydraulic actuator.

따라서 본 발명은 상기와 같은 종래 유압엑츄에이터 부싱의 제반 문제점을 해결코자 발명된 것으로서, 종래의 부싱보다 안정적인 밀봉력을 유지할 수 있을 뿐 아니라 횡압을 상쇄시켜 손상을 방지할 수 있는 유압엑츄에이터 부싱을 제공하는 것을 그 목적으로 한다.Therefore, the present invention was invented to solve all the problems of the conventional hydraulic actuator bushing as described above, to provide a hydraulic actuator bushing that can not only maintain a stable sealing force than the conventional bushing but also offset the lateral pressure to prevent damage. For that purpose.

또한, 체결플렌지와 체결하기 용이한 유압엑츄에이터 부싱을 제공하는 것을 또 다른 목적으로 한다.It is another object of the present invention to provide a hydraulic actuator bushing that is easy to fasten with a fastening flange.

상기와 같은 목적을 달성하기 위하여, 본 발명에 따른 유압엑츄에이터 부싱은 그 내경에 종래의 더스트실(dust seal), 피티이에프(PTFE)분말과 그라파이트(Graphite)분말로 성형하며 횡압을 상쇄시키는 손상감지링(Wear detector ring)을 구비하며, 상기 더스트실(dust seal)과 손상감지링(Wear detector ring) 사이에는 오링(O-ring)을 불화에틸렌수지로 장착홈에 에둘러 감싼 형태로 조합된 조합실(Seal)을 포함하는 것을 특징으로 한다.In order to achieve the above object, the hydraulic actuator bushing according to the present invention is formed of a conventional dust seal (PTFE) powder and graphite powder in the inner diameter of the damage detection to offset the lateral pressure A combination having a ring detector, wherein the O-ring is surrounded by a ethylene fluoride resin in a mounting groove between the dust seal and the wear detector ring. It characterized in that it comprises a seal (Seal).

또한, 상기 부싱의 상부에 체결플렌지와의 체결을 위한 다수의 탭을 구비하는 것을 특징으로 한다.In addition, a plurality of tabs for fastening with the fastening flange is characterized in that the upper portion of the bushing.

본 발명에 의한 유압엑츄에이터 부싱은, 종래의 부싱보다 안정적인 밀봉력을 유지할 수 있을 뿐 아니라 횡압을 상쇄시켜 손상을 방지할 수 있는 한편, 체결플렌 지와도 체결하기 용이하다.Hydraulic actuator bushing according to the present invention, not only can maintain a more stable sealing force than conventional bushings, but also can prevent the damage by offsetting the lateral pressure, it is easy to fasten with the fastening flange.

이하, 첨부된 도면을 참조하여 본 발명에 의한 유압엑츄에이터 부싱의 바람직한 실시예를 상세하게 설명한다. Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the hydraulic actuator bushing according to the present invention.

도 3은 본 발명의 일실시예에 따른 유압엑츄에이터 부싱의 구성단면도이다. 도 3에 도시한 바와 같이, 본 발명의 일실시예에 따른 유압엑츄에이터 부싱은 그 내경에 피스톤 로드부의 외부누설과 이물질 유입을 차단하는 종래의 더스트실(311), 피티이에프(PTFE)분말과 그라파이트(Graphite)분말로 성형하며 횡압을 상쇄시키는 손상감지링(313)을 구비하며, 상기 더스트실(311)과 손상감지링(313) 사이에는 오링(O-ring)을 불화에틸렌수지로 장착홈에 에둘러 감싼 형태로 조합된 조합실(312)을 포함하여 이루어진다.3 is a cross-sectional view of the hydraulic actuator bushing according to an embodiment of the present invention. As shown in Figure 3, the hydraulic actuator bushing according to an embodiment of the present invention is a conventional dust seal 311, PTFE powder and graphite to block the external leakage and foreign material inflow of the piston rod in its inner diameter (Graphite) is formed into a powder and has a damage detection ring 313 to cancel the lateral pressure, O-ring between the dust chamber 311 and the damage detection ring (313) in the mounting groove with ethylene fluoride resin It comprises a combination chamber 312 combined in the form wrapped around.

또한, 상기 부싱의 상부(u)에는 체결플렌지와의 체결을 위한 다수의 탭(t)을 더 구비하는 것이 바람직하다.In addition, the upper portion (u) of the bushing is preferably provided with a plurality of tabs (t) for fastening with the fastening flange.

도 4는 본 발명의 일실시예에 따른 유압엑츄에이터 부싱을 설명하기 위한 참고도이다. 도 4에 도시한 바와 같이, 본 발명의 일실시예에 따른 유압엑츄에이터 부싱(300)은, 유압엑츄에이터의 작동을 위해 유압(P)이 작용하면, 부싱(300)과 로드(R) 사이에 형성되는 유로를 따라 기름(Oil)(O)이 손상감지링(313)을 거처 조합실(312)에 도달하게 되고, 도달된 기름은 조합실(312) 측면을 통해 조합실의 오링(O-Ring)에 압력(P)을 작용하게 되는데, 이때 압력(P) 방향으로 상기 오링에 작 용되는 힘은 조합실의 수직방향으로 팽창력(p)을 발생시켜 조합실이 수직방향으로 팽창하게 된다.Figure 4 is a reference diagram for explaining the hydraulic actuator bushing according to an embodiment of the present invention. As shown in Figure 4, the hydraulic actuator bushing 300 according to an embodiment of the present invention, when the hydraulic pressure (P) acts for the operation of the hydraulic actuator, is formed between the bushing 300 and the rod (R) The oil (O) passes through the damage detection ring 313 to reach the combination chamber 312 along the flow path, and the oil reaches the O-ring of the combination chamber through the side of the combination chamber 312. In this case, the pressure P acts on the O-ring in the direction of the pressure P to generate the expansion force p in the vertical direction of the combination chamber, thereby expanding the combination chamber in the vertical direction.

따라서, 수직방향으로 팽창하게 되는 조합실(312)은 오링(O-Ring)에 작용하는 압력(P)에 비례하여 로드(R)와 밀착하게 되어 저압 뿐 아니라 고압에서도 안정적인 밀봉력을 유지할 수 있다.Therefore, the combination chamber 312 expanded in the vertical direction is in close contact with the rod R in proportion to the pressure P acting on the O-ring, thereby maintaining a stable sealing force at high pressure as well as low pressure. .

또한, 본 발명의 일실시예에 따른 유압엑츄에이터 부싱(300)은, 피티이에프분말과 그라파이트 분말로 고온 압축하여 성형된 손상감지링(313)을 구비하여 상기 손상감지링(313)이 고부하 베어링 역할을 하게 함으로써 횡압을 상쇄시킬 수 있도록 한다.In addition, the hydraulic actuator bushing 300 according to an embodiment of the present invention is provided with a damage detection ring 313 formed by high-temperature compression of PFT powder and graphite powder, and the damage detection ring 313 serves as a high load bearing. By doing so, the lateral pressure can be canceled out.

상기한 바와 같은 구성 및 작용은 하나의 실시예로서 본 발명의 청구범위를 제한하는 것은 아니며, 본 발명의 기술적 사상을 변경하지 아니하는 범위 내에서 다양한 변경과 수정이 가능함은 본 발명이 속하는 분야에 종사하는 자에게는 자명한 것이다.The configuration and operation as described above are not limited to the claims of the present invention as an embodiment, and various changes and modifications are possible within the scope of not changing the technical spirit of the present invention. It is obvious to those who are engaged.

도 1은 발전소 터빈밸브 유압엑츄에이터의 절단구성 및 분해사시도1 is an exploded perspective view and a cutting configuration of a power plant turbine valve hydraulic actuator

도 2는 종래의 유압엑츄에이터 부싱의 구성단면도2 is a cross-sectional view of a conventional hydraulic actuator bushing

도 3은 본 발명의 일실시예에 따른 유압엑츄에이터 부싱의 구성단면도3 is a cross-sectional view of a hydraulic actuator bushing according to an embodiment of the present invention;

도 4는 본 발명의 일실시예에 따른 유압엑츄에이터 부싱을 설명하기 위한 참고도Figure 4 is a reference diagram for explaining the hydraulic actuator bushing according to an embodiment of the present invention

** 도면의 주요 부분에 대한 부호의 설명 **** Description of symbols for the main parts of the drawing **

300 : 부싱(Bushing) 311, 311' : 더스트실(Dust Seal)300: Bushing 311, 311 ': Dust Seal

312 : 조합실(Seal) 312' : 유팩킹실(U-Packing Seal)312: Seal 312 ': U-Packing Seal

313 : 손상감지링(Wear detector ring)313: wear detector ring

R : 로드(Rod) O : 기름(Oil)R: Rod O: Oil

Claims (2)

발전소 터빈밸브 유압엑츄에이터의 부싱에 있어서, In the bushing of the power plant turbine valve hydraulic actuator, 그 내경에 피스톤 로드부의 외부누설과 이물질 유입을 차단하는 더스트실(dust seal), 피티이에프(PTFE)분말과 그라파이트(Graphite)분말로 성형하며 횡압을 상쇄시키는 손상감지링(Wear detector ring)을 구비하며, 상기 더스트실(dust seal)과 손상감지링(Wear detector ring) 사이에는 오링(O-ring)을 불화에틸렌수지로 장착홈에 에둘러 감싼 형태로 조합된 조합실(Seal)을 포함하여 이루어지는 것을 특징으로 하는 유압엑츄에이터 부싱Its inner diameter is formed of dust seal, PTFE powder and graphite powder to block external leakage and foreign material inflow, and is equipped with a wear detector ring to offset lateral pressure. And a combination chamber formed between the dust seal and the damage detector ring in a form in which an O-ring is wrapped around the mounting groove with ethylene fluoride resin. Hydraulic actuator bushing, characterized in that 제 1항에 있어서,The method of claim 1, 상기 부싱의 상부(u)에 체결플렌지와의 체결을 위한 다수의 탭(t)을 더 구비하는 것을 특징으로 하는 유압엑츄에이터 부싱Hydraulic actuator bushing further comprises a plurality of tabs (t) for fastening with the fastening flange on the upper portion (u) of the bushing.
KR1020080020967A 2008-03-06 2008-03-06 Hydraulic Actuator Bushing KR100890601B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457786B1 (en) 2000-04-20 2002-10-01 Caterpillar Inc. Roller assembly of an undercarriage assembly having an integrated retainer and thrust bushing and method for making the same
KR20040013552A (en) * 2002-08-07 2004-02-14 김창용 O-Ring having cover sheet
KR20050071573A (en) * 2002-10-14 2005-07-07 생―고뱅 퍼포먼스 플라스틱스 팜푸스 게엠베하 Slidiing bearing material
KR20060019550A (en) * 2003-06-10 2006-03-03 엔티엔 가부시키가이샤 Sliding bearing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457786B1 (en) 2000-04-20 2002-10-01 Caterpillar Inc. Roller assembly of an undercarriage assembly having an integrated retainer and thrust bushing and method for making the same
KR20040013552A (en) * 2002-08-07 2004-02-14 김창용 O-Ring having cover sheet
KR20050071573A (en) * 2002-10-14 2005-07-07 생―고뱅 퍼포먼스 플라스틱스 팜푸스 게엠베하 Slidiing bearing material
KR20060019550A (en) * 2003-06-10 2006-03-03 엔티엔 가부시키가이샤 Sliding bearing

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