KR20010066432A - Device for appraising capability of Oil Seal - Google Patents

Device for appraising capability of Oil Seal Download PDF

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Publication number
KR20010066432A
KR20010066432A KR1019990068149A KR19990068149A KR20010066432A KR 20010066432 A KR20010066432 A KR 20010066432A KR 1019990068149 A KR1019990068149 A KR 1019990068149A KR 19990068149 A KR19990068149 A KR 19990068149A KR 20010066432 A KR20010066432 A KR 20010066432A
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KR
South Korea
Prior art keywords
negative pressure
engine
oil seal
oil
measuring
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KR1019990068149A
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Korean (ko)
Inventor
임환묵
Original Assignee
이계안
현대자동차주식회사
류정열
기아자동차주식회사
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Application filed by 이계안, 현대자동차주식회사, 류정열, 기아자동차주식회사 filed Critical 이계안
Priority to KR1019990068149A priority Critical patent/KR20010066432A/en
Publication of KR20010066432A publication Critical patent/KR20010066432A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00Testing of engines
    • G01M15/04Testing internal-combustion engines
    • G01M15/08Testing internal-combustion engines by monitoring pressure in cylinders
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/18Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance

Abstract

PURPOSE: A device for testing the performance of an oil seal is provided to simply and conveniently measure the sealing performance of an oil seal mounted to an engine for selecting proper oil seals proper for respective engines, thereby preventing the failure of the engine due to the mounting of an oil seal lacking the sealing performance. CONSTITUTION: A device for testing the performance of an oil seal includes a negative pressure generating element such as a vacuum pump(5) for forming a negative pressure in an engine(1), a negative pressure measuring element for measuring an inner negative pressure of the engine formed by the negative pressure element, a negative pressure control element(4) for controlling the negative pressure applied to the engine by the negative pressure element, and a sensing element(3) for sensing the introduction of atmospheric air into the engine via an oil seal(7) mounted to the engine while the negative pressure is formed in the engine by the negative pressure element.

Description

오일 씨일의 성능평가장치{Device for appraising capability of Oil Seal}Device for appraising capability of Oil Seal

본 발명은 차량 등에 사용되는 오일 씨일에 관한 것으로, 특히 엔진의 크랭크 케이스에 작용하는 부압의 상태에 따라 오일 씨일의 밀봉한계를 파악할 수 있도록 하여 각 엔진마다 적절한 오일 씨일 선정하는 데에 도뭉을 줄 수 있는 오일 씨일의 성능평가장치에 관한 것이다.The present invention relates to an oil seal used in a vehicle and the like, and in particular, it is possible to grasp the sealing limit of the oil seal according to the state of the negative pressure acting on the crankcase of the engine, thereby providing a means for selecting an appropriate oil seal for each engine. A performance evaluation device for oil seals.

일반적으로 각종 운동부품에는 운동부품들간의 마찰을 감소시키기 위해 윤활오일이 공급되는 데, 이러한 윤활오일이 적재적소에 유지되도록 하면서 외부로 유출되는 것을 저지하기 위해 오일 씨일이 사용된다.In general, various moving parts are supplied with lubricating oil to reduce friction between the moving parts, and oil seals are used to prevent the lubricating oil from leaking out while keeping the lubricating oil in place.

상기와 같은 오일 씨일은 예컨대 차량의 엔진에도 사용되는 바, 즉 엔진의윤활오일이 외부로 유출되지 않도록 다수의 오일 씨일 사용되고 있다.The oil seal as described above is also used in an engine of a vehicle, that is, a plurality of oil seals are used so that the lubrication oil of the engine does not leak out.

한편, 일반적으로 중.소형 엔진의 경우에 엔진의 압축 행정과 팽창 행정에서 실린더와 피스톤의 간극으로부터 크랭크 케이스로 빠져 나온 가스와 팽창행정에서 발생하는 연소가스의 혼합체인 블로 바이 가스는 엔진 오일을 열화시켜 엔진의 내구성을 저하시키기 때문에 이를 신속히 외부로 유출시킬 필요가 있는 데, 대기오염의 문제로 인해 최근에는 흡기계통의 에어 크리너쪽으로 되돌려 보내어 재연소시키고 있다.On the other hand, in the case of small and medium-sized engines, blow-by gas, which is a mixture of the gas which escapes from the gap between the cylinder and the piston in the crankcase in the compression stroke and the expansion stroke of the engine and the combustion gas generated in the expansion stroke, deteriorates engine oil. Since the durability of the engine is lowered, it needs to be quickly discharged to the outside. Due to the problem of air pollution, it has recently been returned to the air cleaner of the intake cylinder and reburned.

이에 따라 상당한 부압이 작용하는 흡기계통으로 블로바이 가스를 재순환시킴으로 인해 크랭크 케이스 등의 엔진 내부에는 부압이 작용하게 되는 데, 이러한 상태에서 에어 크리너 등의 오염으로 인해 흡기 부압이 증가하게 되면 엔진에 장착된 리어 오일 씨일이나 프론트 오일 씨일 등의 각종 씨일로 외기가 엔진의 내부로 유입되게 된다.As a result, by recirculating the blow-by gas into the intake cylinder with a significant negative pressure, negative pressure acts inside the engine such as the crankcase.In this state, if the intake negative pressure increases due to contamination of the air cleaner, the engine is mounted on the engine. Outside air is introduced into the engine through various seals such as the rear oil seal and the front oil seal.

상기와 같이 외기가 엔진의 내부로 유입되게 되면 엔진으로 재순환되는 가스의 순환량이 증가하게 되고, 이러한 가스의 증가는 오일의 소모를 증대시키며, 심할 경우에는 실린더헤드에 공급된 오일이 크랭크 케이스로 드레인되지 못하여 발생하는 블로 오버현상(많은 오일이 연소실로 유입되어 디젤링이나 오버 러닝이 발생해서 엔진의 고장을 야기시킴)이 발생하게 된다.As described above, when the outside air is introduced into the engine, the circulation amount of the gas recycled to the engine increases, and the increase of the gas increases the consumption of oil, and in severe cases, the oil supplied to the cylinder head drains into the crankcase. Blow over phenomena (large amounts of oil enter the combustion chamber, causing diesel or overrunning, which can lead to engine failure).

그런데, 종래에는 크랭크 케이스에 작용하는 부압의 상태에 따른 오일 씨일의 적절한 평가방법이 없었기 때문에 오일 씨일의 밀봉한계를 파악할 수 없어고,이 때문에 각종 엔진에 적합한 오일 씨일을 선정하기가 어려워서 대략적인 기준으로 오일 씨일을 장착하고 있었다.However, since there is no proper method of evaluating the oil seal according to the negative pressure acting on the crankcase in the related art, it is not possible to grasp the sealing limit of the oil seal, which makes it difficult to select an oil seal suitable for various engines. Was equipped with oil seal.

이에 본 발명은 상기와 같은 사정을 감안하여 안출된 것으로, 엔진에 장착된 각종 씨일의 밀봉한계를 적절히 평가할 수 있도록 하여 오일 씨일의 장착시에 적절한 기준을 제공하여 오일 씨일을 통한 외기의 유입을 예방할 수 있도록 하는 데에 도움을 줄 수 있는 오일 씨일의 성능평가장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made in view of the above circumstances, and it is possible to appropriately evaluate the sealing limits of various seals mounted on the engine to provide appropriate criteria when installing oil seals to prevent inflow of outside air through oil seals. Its purpose is to provide an oil seal performance evaluation device that can help to ensure this.

상기와 같은 목적을 달성하기 위한 본 발명은, 엔진에 부압을 형성시키기 위한 부압수단과, 이 부압수단을 통해 형성되는 엔진의 내부 부압을 측정하기 위한 부압측정수단, 상기 부압수단에 의해 엔진에 작용하는 부압을 조절하기 위한 부압조절수단 및, 상기 부압수단으로 엔진에 부압을 형성시키는 과정에 엔진에 장착된 오일 씨일을 통해 외기가 엔진 내부로 유입되는 것을 감지하기 위한 감지수단을 갖춘 구조로 되어 있다.The present invention for achieving the above object, the negative pressure means for forming a negative pressure in the engine, the negative pressure measuring means for measuring the internal negative pressure of the engine formed through the negative pressure means, acting on the engine by the negative pressure means Negative pressure adjusting means for adjusting the negative pressure, and the sensing means for detecting that the outside air flows into the engine through the oil seal mounted to the engine in the process of forming the negative pressure to the negative pressure means. .

도1은 본 발명에 따른 오일 씨일의 성능평가장치의 개략적인 구성도이다.1 is a schematic configuration diagram of an apparatus for evaluating the performance of an oil seal according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1 : 엔진 2 : 호스1: engine 2: hose

3 : 공기유량계 4 : 조절밸브3: air flow meter 4: control valve

5 : 진공펌프 6 : 부압측정계5: vacuum pump 6: negative pressure measuring instrument

이하, 본 발명의 실시예를 첨부된 도면을 참조하면서 상세히 설명한다.Hereinafter, with reference to the accompanying drawings an embodiment of the present invention will be described in detail.

도1은 본 발명에 따른 오일 씨일 성능평가장치의 개략적인 구성도인 바, 엔진(1) 내부에 부압을 공급하기 위한 호스(2)의 일단이 연결되고, 이 호스(2)의 타단은 공기의 흐름을 측정할 수 있는 공기유량계(3)의 일측에 연결되며, 상기 공기유량계(3)에는 상기 호스를 통해 공급되는 부압을 수동으로 단속할 수 조절밸브(4)가 연결되어 있다.Figure 1 is a schematic configuration diagram of the oil seal performance evaluation apparatus according to the present invention, one end of the hose (2) for supplying the negative pressure inside the engine (1) is connected, the other end of the hose (2) is air It is connected to one side of the air flow meter (3) capable of measuring the flow of, the air flow meter (3) is connected to the control valve (4) to manually control the negative pressure supplied through the hose.

또, 상기 조절밸브(4)에는 공기를 빨아들여서 부압을 발생시키는진공펌프(5)가 연결되는 데, 이 진공펌프(5)는 흔히 가정용으로 사용되고 있는 진공청소기 정도이면 족하다.In addition, the control valve (4) is connected to a vacuum pump (5) for sucking air to generate a negative pressure, the vacuum pump (5) is enough to be a vacuum cleaner often used for home use.

그리고, 상기 엔진의 크랭크 케이스측 하부에는 엔진 내부의 부압을 측정하기 위한 부압측정계가 (6)가 연결되어 있고, 상기 엔진의 전방에는 프론트 오일 씨일(7)이 설치되어 있다.A negative pressure gauge (6) is connected to the lower part of the crankcase side of the engine, and a front oil seal (7) is provided at the front of the engine.

이에 따라 상기 프론트 오일 씨일(7)의 밀봉성을 평가하기 위해 먼저 상기 조절밸브(4)를 완전히 잠근 다음에 상기 진공펌프(5)를 작동시킨다.Accordingly, in order to evaluate the sealability of the front oil seal 7, the control valve 4 is completely closed first, and then the vacuum pump 5 is operated.

상기 진공펌프(5)의 작동으로 진공펌프에 의해 부압이 형성되면, 이 부압을 엔진내부에 작용시키기 위해 상기 조절밸브(4)를 조금씩 개방시킨다. 그러면, 진공펌프(5)의 부압이 조절밸브(4)를 통해 호스를 매개로 정지상태에 있는 엔진 내부에 작용하여 엔진 내부의 공기를 흡입함에 따라 엔진 내부에 부압이 형성되게 된다.When the negative pressure is generated by the vacuum pump by the operation of the vacuum pump 5, the control valve 4 is opened little by little to operate this negative pressure inside the engine. Then, the negative pressure of the vacuum pump 5 acts on the engine in the stationary state through the hose via the control valve 4 to suck the air in the engine, so that the negative pressure is formed in the engine.

상기와 같이 엔진 내부에 부압을 형성시키는 과정에 상기 공기유량계를 매개로 호스를 통해 공기의 흐름이 있는 지를 파악한다.As described above, in the process of forming a negative pressure inside the engine, it is determined whether there is a flow of air through the hose through the air flow meter.

이 경우에 엔진의 내부가 완전히 밀봉되어 있다면, 일정 시간이 경과한 후에 공기유량계를 통한 공기의 흐름이 없게 되므로, 공기유량계의 값은 제로가 될 것이다.In this case, if the inside of the engine is completely sealed, there will be no flow of air through the air flowmeter after a certain time, so the value of the air flowmeter will be zero.

상기와 같은 과정에 진공펌프를 계속 가동해서 부압을 높이게 되면, 엔진 내부의 부압이 상기 오일 씨일에 작용하게 되는 바, 엔진 내부의 부압이 소정 값 이상으로 상승하게 하면 오일 씨일을 통해 외기가 엔진 내부로 유입되게 되고, 이렇게 유입된 외기는 다시 호스와 공기유량계를 통해 진공펌프로 흡입되게 된다.If the vacuum pump is continuously operated in the above process to increase the negative pressure, the negative pressure inside the engine acts on the oil seal, and when the negative pressure inside the engine rises above a predetermined value, the outside air inside the engine is sealed through the oil seal. The outside air is introduced into the vacuum pump through the hose and the air flow meter.

즉, 오일 씨일과 그 장착방법에 따라서 오일 씨일에 의한 한계 밀봉성을 부압측정계를 통해 용이하게 파악할 수 있게 되고, 엔진에 따라서 적절히 요구되는 오일 씨일을 용이하게 선정하여 장착함으로써, 엔진의 밀봉성을 향상시킬 수 있게 된다.That is, according to the oil seal and the mounting method thereof, the limit sealability of the oil seal can be easily understood through the negative pressure gauge, and the sealability of the engine can be easily selected by installing the oil seal appropriately required according to the engine. It can be improved.

이상 설명한 바와 같이, 본 발명에 따른 오일 씨일의 성능평가장치에 의하면, 엔진에 장착되는 오일 씨일의 밀봉성을 간단하면서도 용이하게 측정할 수 있으므로, 각 엔진마다 요구되는 밀봉성에 적합한 오일 씨일을 선정하여 적절히 엔진에 장착함으로써, 엔진의 밀봉성을 향상시킬 수 있을 뿐만 아니라 밀봉성능이 부족한 오일 씨일 장착함으로 인한 엔진의 고장발생을 예방하는 데에 도움을 줄 수 있는 효과가 있다.As described above, according to the oil seal performance evaluation apparatus according to the present invention, since the sealability of the oil seal mounted on the engine can be easily and easily measured, an oil seal suitable for the sealability required for each engine is selected. By properly mounting the engine, it is possible not only to improve the sealability of the engine, but also to help prevent the occurrence of engine failure due to the oil seal installation lacking the sealing performance.

Claims (3)

엔진에 부압을 형성시키기 위한 부압수단과, 이 부압수단을 통해 형성되는 엔진의 내부 부압을 측정하기 위한 부압측정수단, 상기 부압수단에 의해 엔진에 작용하는 부압을 조절하기 위한 부압조절수단 및, 상기 부압수단으로 엔진에 부압을 형성시키는 과정에 엔진에 장착된 오일 씨일을 통해 외기가 엔진 내부로 유입되는 것을 감지하기 위한 감지수단을 갖춘 오일 씨일의 성능평가장치.Negative pressure means for forming a negative pressure in the engine, negative pressure measuring means for measuring the internal negative pressure of the engine formed through the negative pressure means, negative pressure adjusting means for adjusting the negative pressure acting on the engine by the negative pressure means, and An oil seal performance evaluation apparatus having a sensing means for detecting the inflow of outside air into the engine through the oil seal mounted on the engine in the process of forming a negative pressure in the engine by the negative pressure means. 제1항에 있어서,The method of claim 1, 상기 부압발생수단이 진공펌프로 이루어진 것을 특징으로 하는 오일 씨일의 성능평가장치.Oil seal performance evaluation device, characterized in that the negative pressure generating means is made of a vacuum pump. 제1항에 있어서,The method of claim 1, 상기 감지수단이 상기 부압수단에 의한 부압으로 오일씨일을 통해 유입된 경우에 외기의 유동을 감지하는 공기유량계를 갖춘 것을 특징으로 하는 오일 씨일의 성능평가장치.And an air flow meter for detecting the flow of outside air when the detecting means is introduced through the oil seal at the negative pressure by the negative pressure means.
KR1019990068149A 1999-12-31 1999-12-31 Device for appraising capability of Oil Seal KR20010066432A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581628B (en) * 2009-07-03 2011-01-05 成都盛帮密封件有限公司 Engine valve oil seal test stand
CN117168704A (en) * 2023-11-02 2023-12-05 固仕(辽阳)材料科技有限公司 Sealing grease water pressure resistance tightness testing device for shield tunneling machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101581628B (en) * 2009-07-03 2011-01-05 成都盛帮密封件有限公司 Engine valve oil seal test stand
CN117168704A (en) * 2023-11-02 2023-12-05 固仕(辽阳)材料科技有限公司 Sealing grease water pressure resistance tightness testing device for shield tunneling machine
CN117168704B (en) * 2023-11-02 2024-01-12 固仕(辽阳)材料科技有限公司 Sealing grease water pressure resistance tightness testing device for shield tunneling machine

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