KR20120021681A - Radial shaft seal unit with stairway labyrinth seal - Google Patents

Radial shaft seal unit with stairway labyrinth seal Download PDF

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Publication number
KR20120021681A
KR20120021681A KR1020100078030A KR20100078030A KR20120021681A KR 20120021681 A KR20120021681 A KR 20120021681A KR 1020100078030 A KR1020100078030 A KR 1020100078030A KR 20100078030 A KR20100078030 A KR 20100078030A KR 20120021681 A KR20120021681 A KR 20120021681A
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South Korea
Prior art keywords
seal
radial
rotor
labyrinth seal
stator
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KR1020100078030A
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Korean (ko)
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KR101618375B1 (en
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이상구
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현대중공업 주식회사
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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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/24—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings with radially or tangentially compressed packing
    • 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
    • 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
    • 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
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

PURPOSE: A radial shaft seal device comprising stepped labyrinth seal is provided to enhance the sealing performance of radial seal by reducing inner oil pressure transferred to the radial seal for the first time. CONSTITUTION: A radial shaft seal device comprising stepped labyrinth seal comprises a sleeve(50), a housing(30), and a seal cover. Lubricant is filled in a space between radial seals(10). The labyrinth seal is connected to the sleeve and the housing to be located on the front end of the radial seal and comprises a rotor(21) and a stator(22). The rotor is connected to the sleeve. The stator is connected to the housing. The stator and the rotor comprise a stepped gap(23).

Description

계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치{Radial Shaft Seal Unit With Stairway Labyrinth Seal}Radial Shaft Seal Unit With Stairway Labyrinth Seal}

본 발명은 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치에 관한 것으로, 선박용 조향장치인 스러스터의 회전축 밀봉을 위해 설치되는 레디알 샤프트 씰의 전단에 계단형 래비린스 씰을 추가로 설치하여 내부오일압력을 1차적으로 감압시킬 수 있는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치에 관한 것이다.
The present invention relates to a radial shaft seal device including a stepped labyrinth seal, and further comprising a stepped labyrinth seal at a front end of the radial shaft seal installed for sealing a rotating shaft of a thruster, which is a steering device for ships. The present invention relates to a radial shaft seal device including a stepped labyrinth seal capable of primarily reducing pressure.

일반적으로 상선(컨테이너선, LNG선, 탱커선, 자동차운반선 등) 및 이동식 선박인 FPSO(Floating Production, Storage & Offloading)와 같은 해상부유설비는 선수 또는 선체의 조향을 위하여 스러스터(thruster)가 선체하부에 설치된다. In general, offshore facilities such as commercial ships (container ships, LNG ships, tanker ships, car carriers, etc.) and mobile ships, FPSO (Floating Production, Storage & Offloading), are equipped with thrusters for hull or hull steering. It is installed at the bottom.

이 스러스터의 프로펠러를 구동하기 위하여 모터로부터 동력이 전달되며 축 및 기어로 구성된 동력전달장치는 윤활을 위하여 오일(즉, 윤활제)이 가득 채워진 기어 케이싱 속에 설치되어 있고, 기어 케이싱 내부에는 스러스터의 수면하부 잠김 깊이에 대응하기 위하여 침수압력보다 더 높게 일정한 압력이 작용하도록 한다. Power is transmitted from the motor to drive the propeller of the thruster. A power train consisting of shafts and gears is installed in a gear casing filled with oil (ie lubricant) for lubrication. To cope with the submerged submerged depth, a constant pressure is applied higher than the submerged pressure.

이때, 기어 케이싱으로부터 밖으로 노출된 축에는 축과 하우징(기어 케이싱) 사이에 내부 압력오일이 외부로 누설되지 않도록 축 밀봉장치인 레디알 샤프트 씰이 장착되어 있다. At this time, the shaft exposed outward from the gear casing is equipped with a radial shaft seal, which is a shaft sealing device, so that internal pressure oil does not leak out between the shaft and the housing (gear casing).

이와 같은 스러스터용 레디알 샤프트 씰장치는 스러스터의 내부오일 압력에 따라 2개의 씰이 설치되는데, 1개의 씰은 정상적인 밀봉역할을 하도록 하고 다른 한개의 씰은 예비용으로 확보하게 된다. 도 1 은 종래 스러스터용 레디알 샤프트 씰장치 중 2개의 씰이 설치된 예를 도시한 것이다.The radial shaft seal device for such a thruster is provided with two seals according to the internal oil pressure of the thruster, one seal serves as a normal sealing role and the other seal is reserved for reserve. 1 shows an example in which two seals are installed in a radial shaft seal device for a conventional thruster.

도 1 에 예시한 종래 스러스터용 레디알 샤프트 씰장치는, 회전 슬리브의 외주면에 일정간격을 두고 2개의 씰(6,7)을 설치하고 2개의 씰(6,7) 사이에 형성된 공간부에는 그리스 등과 같은 윤활제를 충진시킨 구성으로 되어 있다.The conventional radial shaft seal device for thruster illustrated in FIG. 1 is provided with two seals 6 and 7 at regular intervals on the outer circumferential surface of the rotating sleeve, and grease is formed in the space formed between the two seals 6 and 7. It is a structure filled with a lubricant, such as these.

또한, 내부압력(P1)이 레디알씰이 허용할 수 있는 압력보다 높을 경우, 씰의 수명이 급격히 저하되고, 씰의 밀봉 성능이 파괴되어 밀봉기능을 수행할 수 없게 되는 등 여러가지 문제점이 있었다.
In addition, when the internal pressure (P1) is higher than the pressure allowable by the radial seal, there are various problems, such as the life of the seal is sharply lowered, the sealing performance of the seal is destroyed and the sealing function cannot be performed.

본 발명은 상기와 같은 문제점을 해소하기 위한 것으로, 그 목적은 레디알 씰의 전단에 계단형 래비린스 씰을 설치하여, 레디알씰에 작용하는 압력을 저감시킬 수 있는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치를 제공하는 것이다. The present invention is to solve the above problems, the object is to install a stepped labyrinth seal in front of the radial seal, Radial including a stepped labyrinth seal that can reduce the pressure acting on the radial seal It is to provide a shaft seal device.

본 발명의 또다른 목적은 계단형 래비린스씰의 수평부가 경사도를 구비하도록 하여, 축회전 원심력에 의한 유체의 이동에 의해 래비린스씰의 틈새를 통과한 유체 압력을 강하시킬 수 있는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치를 제공하는 것이다. Still another object of the present invention is to make the horizontal part of the stepped labyrinth seal have an inclination, so that the stepped labyrinth can lower the fluid pressure passing through the gap of the labyrinth seal by the movement of the fluid by the axial rotation centrifugal force. It is to provide a radial shaft seal device including a seal.

본 발명의 또다른 목적은 스러스터 회전축에 조립되는 래비린스씰 내경부에 나선형 홈을 형성하여, 축회전에 따라 내부오일이 레디알씰이 있는 상부로 강제이송되어 씰의 윤활성능 저하를 방지할 수 있는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치를 제공하는 것이다.
Another object of the present invention is to form a spiral groove on the inner diameter of the labyrinth seal to be assembled to the thruster rotating shaft, the inner oil is forced to the upper portion with the radial seal in accordance with the shaft rotation can prevent the degradation of the lubricating performance of the seal To provide a radial shaft seal device comprising a stepped labyrinth seal.

본 발명은 회전축의 외주면에 회전축 슬리브가 설치되고, 상기 회전축 슬리브의 외면에는 씰 하우징와 씰 커버 및 볼트를 통해 2개의 씰이 일정 간격을 두고 다단으로 설치되며, 상기 씰 사이에 형성된 공간부에는 윤활제가 충진된 구성을 갖는 스러스터용 레디알 샤프트 씰장치에 있어서, The present invention is a rotary shaft sleeve is installed on the outer circumferential surface of the rotary shaft, two seals are installed in multiple stages at regular intervals through a seal housing, a seal cover and a bolt on the outer surface of the rotary shaft sleeve, a lubricant is formed in the space portion formed between the seals In the radial shaft seal device for the thruster having a filled configuration,

상기 2개의 씰 전단에 위치하도록 래비린스씰을 회전축 슬리브 및 하우징에 연결하여 설치하되,The labyrinth seal is installed to connect to the rotating shaft sleeve and the housing so as to be located in front of the two seals,

상기 래비린스씰은 회전축 슬리브에 연결설치되는 로우터와, 하우징에 연결설치되는 스테이터와, 상기 로우터와 스테이터는 계단형으로 이루어진 습동부 틈새를 포함하도록 되어 있다. The labyrinth seal is configured to include a rotor connected to the rotating shaft sleeve, a stator connected to the housing, and the rotor and the stator include a sliding part gap formed in a step shape.

또한, 상기 회전축 슬리브에 연결설치되는 래비린스씰의 로우터에는 나선형 홈이 형성되어 있다.
In addition, a spiral groove is formed in the rotor of the labyrinth seal connected to the rotary shaft sleeve.

이와 같이 본 발명은 스러스터 회전축에 설치된 레디알 씰의 선단에 계단형 래비린스씰을 더 설치하여, 레디알씰로 전달되는 내부오일압력을 1차적으로 감압시켜줌으로써, 레디알씰의 밀봉성능을 더욱 향상시키며, 레디알씰의 수명을 연장시킬 수 있다. As described above, the present invention further installs a step-type labyrinth seal at the tip of the radial seal installed on the thruster rotating shaft, thereby primarily reducing the internal oil pressure delivered to the radial seal, thereby further improving the sealing performance of the radial seal. It can extend the life of Radial Seal.

또한, 본 발명은 회전축 슬리브에 설치되는 래비린스씰 내경부에 나선형홈이 형성되어 있어, 축회전에 따라 내부오일이 레디알씰이 있는 상부로 강제이송되므로, 종래 레디알씰의 하부에 형성되던 에어포켓으로 인한 씰의 윤활성능 저하현상을 제거할 수 있다. In addition, the present invention is a spiral groove formed in the inner diameter of the labyrinth seal to be installed in the rotating shaft sleeve, the inner oil is forced to the upper portion with the radial seal in accordance with the axial rotation, the air pocket was formed in the lower portion of the conventional radial seal This can eliminate the lubrication deterioration of the seal.

또한, 본 발명은 로우터와 스테이터 사이에 위치하는 습동부 틈새를 계단형으로 하되, 상기 계단형 습동부 틈새의 수평부에 경사도를 구비하도록 하여, 축회전 원심력에 의해 습동부 틈새에 위치한 유체가 외경부방향으로 밀려나가 래비린스씰의 틈새를 통과한 유체의 압력이 강하되도록 되어 있다. In addition, the present invention is to make the sliding part gap located between the rotor and the stator to a stepped shape, to have a slope in the horizontal portion of the stepped sliding part gap, the fluid located in the sliding part gap by the axial rotation centrifugal force The pressure of the fluid, which is pushed toward the neck and passed through the gap of the labyrinth seal, is reduced.

또한, 본 발명은 습동부 틈새에 위치하도록 로우터 일측에 나선형 돌기를 설치하여, 습동부 틈새 간격을 유지하고, 축회전에 따라 틈새유체를 외경부 방향으로 유도하여, 래비린스씰의 틈새를 통과한 유체의 압력을 강하시킬 수 있는 등 많은 효과가 있다.
In addition, the present invention is to install a spiral protrusion on one side of the rotor to be located in the sliding part gap, to maintain the gap between the sliding part, to guide the gap fluid in the direction of the outer diameter part along the axial rotation, passing through the gap of the labyrinth seal There are many effects such as the pressure drop of the fluid.

도 1 은 종래의 구성을 보인 예시도
도 2 는 본 발명에 따른 구성을 보인 예시도
도 3 은 본 발명에 따른 상세구성을 보인 예시도1 is an exemplary view showing a conventional configuration
2 is an exemplary view showing a configuration according to the present invention
Figure 3 is an exemplary view showing a detailed configuration according to the present invention

도 2 는 본 발명에 따른 구성을 보인 예시도를, 도 3 은 본 발명에 따른 상세구성을 보인 예시도를 도시한 것으로, 2 is an exemplary view showing a configuration according to the present invention, Figure 3 is an exemplary view showing a detailed configuration according to the present invention,

본 발명은 스러스터용 레디알 샤프트 씰장치에 있어서, 레디알씰(10)의 전단에 위치하도록 계단형상의 래비린스씰(20)을 설치하여, 레디알씰(10)에 전달되는 하우징(30,기어 케이싱)의 내부오일압력(P1)을 1차적으로 감압시켜 주어, 레디알씰(10)의 밀봉성능을 향상시키도록 되어 있다.
In the present invention, a radial shaft seal device for a thruster is provided with a stepped labyrinth seal 20 so as to be positioned at the front end of the radial seal 10, and a housing 30 which is transmitted to the radial seal 10 (gear casing). The internal oil pressure (P1) of the () is primarily reduced in pressure to improve the sealing performance of the radial seal (10).

즉, 본 발명은 회전축(40)의 외주면에 회전축 슬리브(50)가 설치되고, 상기 회전축 슬리브(50)의 외면에는 하우징(30)과 씰 커버(14) 및 볼트(15)를 통해 2개의 씰(11,12)이 일정 간격을 두고 다단으로 설치되며, 상기 씰 사이에 형성된 공간부(13)에는 윤활제가 충진되는 레디알씰(10)을 구비한 스러스터용 레디알 샤프트 씰장치에 있어서, That is, in the present invention, the rotary shaft sleeve 50 is installed on the outer circumferential surface of the rotary shaft 40, and the two seals are provided on the outer surface of the rotary shaft sleeve 50 through the housing 30, the seal cover 14, and the bolt 15. In the radial shaft seal device for the thruster (11, 12) is provided in multiple stages at regular intervals, and the radial seal (10) filled with a lubricant in the space (13) formed between the seals,

상기 레디알씰(10)의 전단(A)에 위치하도록 래비린스씰(20)을 회전축 슬리브(50) 및 하우징(30)에 연결하여 설치하되,The labyrinth seal 20 is installed to be connected to the rotary shaft sleeve 50 and the housing 30 so as to be located at the front end (A) of the radial seal 10,

상기 래비린스씰(20)은 회전축 슬리브(50)에 연결설치되는 로우터(21,Rotor)와, 하우징(30)에 연결설치되는 스테이터(22,Stator)와, 상기 로우터(21)와 스테이터(22)는 계단형으로 이루어진 습동부 틈새(23)를 포함하도록 되어 있다.
The labyrinth seal 20 is a rotor (21, Rotor) is connected to the rotating shaft sleeve 50, the stator (22, Stator) is connected to the housing 30, the rotor 21 and the stator (22) ) Is configured to include a sliding part gap 23 formed in a stepped shape.

상기 래비린스씰(20)의 로우터(21)는 내경부(21a)가 회전축(40)에 연결설치되고, 스테이터(22)는 외경부(22b)가 하우징(30)에 연결설치되며, 상기 로우터(21)와 스테이터(22)는 NBR(니트릴부타디엔고무) 또는 바이톤(VITON) 등의 고무재질로 적용하여 설치가 간편하고, 마찰로 인한 문제를 방지하도록 되어 있다.
The rotor 21 of the labyrinth seal 20 has an inner diameter portion 21a connected to the rotation shaft 40, and the stator 22 has an outer diameter portion 22b connected to the housing 30. The 21 and the stator 22 are made of a rubber material such as NBR (nitrile butadiene rubber) or Viton, and are easy to install and are designed to prevent problems due to friction.

또한, 상기 래비린스씰의 로우터의 내경부(21a)에는 내부오일을 상부(레디알씰방향)로 강제이송시키기 위한 다수개의 나선형 홈(51)이 형성되어 있으며, 상기 로우터의 내경부(21a)에는 나선형 홈(51)과 연통되는 홀(21c)이 상부 및 하부에 형성되어 있다. In addition, the inner diameter portion 21a of the rotor of the labyrinth seal is formed with a plurality of spiral grooves 51 for forcibly transferring the inner oil to the upper portion (the radial seal direction), and the inner diameter portion 21a of the rotor. Holes 21c communicating with the helical grooves 51 are formed in the upper and lower portions.

즉, 상기 나선형 홈(51)은 회전축의 회전에 따라 내부오일이 홀(21c)를 통해 나선형 홈(51)을 따라 이동되어 레디알씰이 있는 상부로 전달되게 된다. 이러한 나선형 홈의 구성은 레디알씰보다 탱크로 올라가는 배관연결부가 아래에 있어 씰의 하부에 에어포켓이 형성되고 이로 인해 레디알씰의 윤활성능이 저하되는 종래의 문제점을 개선시킨 것이다.
That is, the helical groove 51 is moved along the helical groove 51 through the hole (21c) in accordance with the rotation of the rotary shaft is transferred to the upper portion with the radial seal. The configuration of the spiral groove is to improve the conventional problem that the air connection is formed in the lower portion of the seal lower than the pipe connection to the tank than the radial seal, thereby reducing the lubricating performance of the radial seal.

상기 습동부 틈새(23)는 래비린스씰의 로우터(21)와 스테이터(22) 사이의 틈새로, 폭(W) 0.2?2㎜ 범위내에서 축의 직경에 따라 설정된다. The sliding part clearance 23 is a clearance between the rotor 21 and the stator 22 of the labyrinth seal, and is set according to the diameter of the shaft within the width W of 0.2 to 2 mm.

상기 습동부 틈새(23)는 로우터(21) 및 스테이터(22)의 외경부(21b,22b)에서 레디알씰(10)이 위치한 방향(내경부방향)으로 형성되어 있으며, 0?15ㅀ 경사도(θ)를 구비하는 수평부(23a)와, 상기 수평부(23a)와 연결되는 수직부(23b)에 의해 계단형으로 형성되어 있다.
The sliding part gap 23 is formed in the direction in which the radial seal 10 is positioned (inner diameter direction) at the outer diameter portions 21b and 22b of the rotor 21 and the stator 22, and has an inclination of 0 to 15 ㅀ. It is formed stepwise by the horizontal part 23a provided with (theta), and the vertical part 23b connected with the said horizontal part 23a.

또한, 상기 습동부 틈새(23)에 위치하는 로우터의 외경 일부에는 다수개의 나선형 날개(24)가 돌출형성되어 있으며, 상기 나선형 날개(24)의 돌출높이는 습동부 틈새 폭(Ｗ)과 동일하도록 되어 있어, 로우터(21)와 스테이터(22) 간의 틈새를 유지할 수 있도록 되어 있다. In addition, a plurality of spiral blades 24 protrude from a portion of the outer diameter of the rotor positioned in the sliding part gap 23, and the protruding height of the spiral blade 24 is equal to the width of the sliding part gap. The gap between the rotor 21 and the stator 22 can be maintained.

상기와 같은 구성된 나선형 날개(24)는 2?20개까지 적용될 수 있으며, 회전축의 회전에 따라 습동부 틈새(23)에 위치한 틈새유체를 외경부 방향으로 유도하게 된다. 이와 같은 나선형 날개(24)의 날개수 및 나선각도는 축 회전수, 설치부 직경 및 압력강하 목표치를 고려하여 결정한다.
The spiral blades 24 configured as described above may be applied to 2 to 20 pieces, and guide the gap fluid located in the sliding part gap 23 according to the rotation of the rotating shaft in the direction of the outer diameter part. The number of blades and the spiral angle of the spiral blade 24 are determined in consideration of the shaft rotation speed, the installation diameter, and the pressure drop target value.

이와 같이 구성된 본 발명은 씰의 수명과 밀봉성능을 고려하여 레디알씰에 작용하는 압력(P2)을 결정하고, 래비린스씰의 형상 및 습동부 틈새의 간극을 설계한다.
The present invention configured as described above determines the pressure (P2) acting on the radial seal in consideration of the life and sealing performance of the seal, and design the gap between the shape of the labyrinth seal and the sliding part gap.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위내에 있게 된다.
The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

(10) : 레디알씰 (11,12) : 씰
(13) : 공간부 (14) : 씰커버
(15) : 볼트 (20) : 래비린스씰
(21) : 로우터 (21a) : 내경부
(21b) : 외경부 (21c) : 홀
(22) : 스테이터 (22b) : 외경부
(23) : 습동부 틈새 (24) : 나선형 날개
(30) : 하우징 (40) : 회전축
(50) : 회전축 슬리브 (51) : 나선형 홈
(60) : 오일배관(탱크)(10): radial seal (11, 12): seal
(13): space part (14): seal cover
(15): Bolt (20): labyrinth seal
21: rotor 21a: inner diameter
21b: outer diameter part 21c: hole
(22): Stator (22b): outer diameter part
23: sliding part crevice 24: spiral wing
30: housing 40: rotating shaft
50: rotating shaft sleeve 51: spiral groove
(60): oil piping (tank)

Claims (5)

회전축의 외주면에 회전축 슬리브가 설치되고, 상기 회전축 슬리브의 외면에는 하우징과 씰 커버 및 볼트를 통해 2개의 씰이 일정 간격을 두고 다단으로 설치되며, 상기 씰 사이에 형성된 공간부에는 윤활제가 충진되는 레디알씰을 구비한 스러스터용 레디알 샤프트 씰장치에 있어서,
상기 레디알씰의 전단(A)에 위치하도록 래비린스씰을 회전축 슬리브 및 하우징에 연결하여 설치하되,
상기 래비린스씰은 회전축 슬리브에 연결설치되는 로우터와, 하우징에 연결설치되는 스테이터와, 상기 로우터와 스테이터는 계단형으로 이루어진 습동부 틈새를 포함하는 것을 특징으로 하는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치.
A rotary shaft sleeve is installed on an outer circumferential surface of the rotary shaft, and two seals are installed in multiple stages at regular intervals through a housing, a seal cover, and a bolt on the outer surface of the rotary shaft sleeve, and a radial portion filled with lubricant is provided in the space formed between the seals. In the radial shaft seal device for thrusters provided with a seal,
The labyrinth seal is installed to connect to the rotating shaft sleeve and the housing so as to be located at the front end (A) of the radial seal,
The labyrinth seal includes a rotor connected to the rotating shaft sleeve, a stator connected to the housing, and the rotor and the stator include a stepped labyrinth seal, characterized in that it comprises a sliding part gap formed in a step shape. Shaft seal device.
청구항 1 에 있어서;
상기 회전축 슬리브에 연결설치되는 래비린스씰의 로우터에는 내부오일을 상부(레디알씰방향)로 강제이송시키기 위한 다수개의 나선형 홈이 형성되어 있는 것을 특징으로 하는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치.
The method of claim 1,
Radial shaft seal comprising a stepped labyrinth seal, characterized in that the rotor of the labyrinth seal connected to the rotary shaft sleeve is formed with a plurality of spiral grooves for forcibly transferring the inner oil to the upper (radial seal direction). Device.
청구항 1 에 있어서;
상기 습동부 틈새는 로우터 및 스테이터의 외경부에서 레디알씰이 위치한 방향(내경부방향)으로 형성되어 있으며, 0?15ㅀ 경사도(θ)를 구비하는 수평부와, 상기 수평부와 연결되는 수직부에 의해 계단형으로 형성되어 있는 것을 특징으로 하는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치.
The method of claim 1,
The sliding part clearance is formed in the direction of the radial seal in the outer diameter portion of the rotor and the stator (inner diameter direction), and has a horizontal portion having a 0 ~ 15 ㅀ inclination (θ), and a vertical portion connected to the horizontal portion Radial shaft seal device comprising a step-shaped labyrinth seal, characterized in that the step is formed by a step.
청구항 1 또는 청구항 3 에 있어서;
상기 습동부 틈새는 폭(W) 0.2?2㎜ 으로 설정된 것을 특징으로 하는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치.
The method according to claim 1 or 3;
Radial shaft seal device comprising a stepped labyrinth seal, characterized in that the sliding portion gap is set to a width (W) 0.2 ~ 2㎜.
청구항 1 에 있어서;
상기 습동부 틈새에 위치하는 로우터의 외경 일부에는 다수개의 나선형 날개가 돌출형성되어 있으며, 상기 나선형 날개의 돌출높이는 습동부 틈새 폭(Ｗ)과 동일하도록 구성된 것을 특징으로 하는 계단형 래비린스 씰을 포함하는 레디알 샤프트 씰장치.The method of claim 1,
A portion of the outer diameter of the rotor located in the sliding portion gap is formed with a plurality of spiral wings protruding, the protrusion height of the spiral wing comprises a stepped labyrinth seal, characterized in that configured to be equal to the width of the sliding portion gap (Ｗ). Radial shaft seal device.
KR1020100078030A 2010-08-13 2010-08-13 Radial Shaft Seal Unit With Stairway Labyrinth Seal KR101618375B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9115810B2 (en) 2012-10-31 2015-08-25 General Electric Company Pressure actuated film riding seals for turbo machinery
US10161259B2 (en) 2014-10-28 2018-12-25 General Electric Company Flexible film-riding seal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102050892B1 (en) 2018-09-21 2019-12-02 주식회사 케이티이 Multistage sealing type radial shaft seal unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9115810B2 (en) 2012-10-31 2015-08-25 General Electric Company Pressure actuated film riding seals for turbo machinery
US10161259B2 (en) 2014-10-28 2018-12-25 General Electric Company Flexible film-riding seal

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