KR101204635B1 - Fuel injection pump with umbrella plunger guide - Google Patents

Fuel injection pump with umbrella plunger guide Download PDF

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Publication number
KR101204635B1
KR101204635B1 KR1020110095015A KR20110095015A KR101204635B1 KR 101204635 B1 KR101204635 B1 KR 101204635B1 KR 1020110095015 A KR1020110095015 A KR 1020110095015A KR 20110095015 A KR20110095015 A KR 20110095015A KR 101204635 B1 KR101204635 B1 KR 101204635B1
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KR
South Korea
Prior art keywords
plunger
guide
plunger guide
umbrella
pump
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KR1020110095015A
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Korean (ko)
Inventor
박득진
김주태
김승혁
이창하
김명훈
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현대중공업 주식회사
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Priority to KR1020110095015A priority Critical patent/KR101204635B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

PURPOSE: A fuel injection pump with an umbrella plunger guide is provided to prevent lubricants from becoming polluted due to mixed oil as the sections for the lubricants, mixed oil, and fuel are surely divided. CONSTITUTION: A fuel injection pump comprises a pump housing(100) and a pump barrel(130). A fuel suction port(110) and a plunger guide(10) are installed in the pump housing. The pump barrel is inserted into the pump housing. A plunger(120) coupled to the plunger guide is operated according to the pump barrel, and high pressure fuel is injected into an engine. The plunger guide comprises a spring guide(50), a plurality of drain holes, and an umbrella part(30). The plurality of drain holes is formed on the bottom of the plunger guide corresponding to the through hole of the spring guide. The umbrella part protrudes along the circumference, and guides the mixed oil passing through the drain holes.

Description

엄브렐러 플런저가이드가 구비된 연료 분사펌프{Fuel injection pump with umbrella plunger guide}Fuel injection pump with umbrella plunger guide

본 발명은 고압연료를 엔진에 분사하는 연료 분사펌프에 관한 것으로서, 보다 구체적으로는 플런저가이드의 바닥면에 오염된 혼합오일을 배출시킬 수 있는 다수개의 드레인홀을 구비함과 아울러 상기 드레인홀을 통과하는 혼합오일을 안내할 수 있는 엄브렐러부(Umbrella Part)가 설치됨으로써, 오염된 혼합오일을 분리 배출하여 엔진 윤활유의 오염을 방지할 수 있는 엄브렐러 플런저가이드가 구비된 연료 분사펌프에 관한 것이다.
The present invention relates to a fuel injection pump for injecting high-pressure fuel into the engine, and more particularly, has a plurality of drain holes through which the contaminated mixed oil can be discharged on the bottom surface of the plunger guide and passes through the drain holes. By installing an umbrella part (Umbrella Part) capable of guiding the mixed oil, and relates to a fuel injection pump having an umbrella plunger guide that can separate and discharge the contaminated mixed oil to prevent contamination of the engine lubricating oil.

일반적으로 박용엔진에 사용되는 연료 분사펌프는 Shop test, 해상 운전시 및 본 운전시 각기 다른 연료의 점도(Viscosity)인 Bunker-C(HFO:HEAVY FUEL OIL)를 사용하고, 또한 대체 연료로서 MDO(MARINE DIESEL OIL)를 사용하여 엔진 분사를 하기 위한 고압을 형성하게 된다.In general, fuel injection pumps used in marine engines use Bunker-C (HFO: HEAVY FUEL OIL), which is the viscosity of different fuels in shop test, marine operation, and main operation. MARINE DIESEL OIL) is used to create a high pressure for injection.

이때 연료펌프는 고압 분사용 메인연료로서 HFO, MDO를 사용하지만 이를 구동하는 장치나 연동된 기구의 작동을 위하여 별도의 윤활유(Lubricating Oil)를 사용한다. At this time, the fuel pump uses HFO and MDO as the main fuel for high pressure injection, but uses a separate lubricating oil for the operation of the device or the interlocking mechanism for driving the fuel.

보통 윤활유(Lubricating Oil)는 연료 분사펌프의 작동후에 엔진 챔버내로 회수된 후, 필요한 메쉬사이즈를 통해서 재사용 되도록 함으로써, Re-circulation 개념으로 사용되고 있다.Normally, lubricating oil is used in the concept of re-circulation by being recovered into the engine chamber after the operation of the fuel injection pump and reused through the required mesh size.

이하 도 1을 참조하여 종래의 연료 분사펌프를 개략적으로 설명한다.Hereinafter, a conventional fuel injection pump will be described with reference to FIG. 1.

도 1은 종래의 연료 분사펌프의 단면도를 나타낸 것이다.1 is a cross-sectional view of a conventional fuel injection pump.

도시된 바와 같이, 펌프하우징(100)의 상부에는 연료흡입구(110)가 설치되고, 내부에는 펌프배럴(130)이 삽입 설치되며, 하부에는 스프링(140)이 설치된 플런저가이드(150)가 구비된다.As shown, the fuel inlet 110 is installed in the upper portion of the pump housing 100, the pump barrel 130 is inserted therein, the plunger guide 150 is provided with a spring 140 is installed below. .

이때 플런저(120)는 플런저가이드(150)에 결합되어 펌프배럴(130)을 따라 상,하로 슬라이딩 왕복운동 함으로써, 연료흡입구(110)로부터 펌프배럴(130) 내부로 주입된 연료를 연료밸브(인젝터)로 고압 이송시켜 분사하게 되는 것이다.At this time, the plunger 120 is coupled to the plunger guide 150 to reciprocate up and down along the pump barrel 130, thereby injecting fuel injected into the pump barrel 130 from the fuel inlet 110 into the fuel valve (injector). High pressure transfer to the spray will be.

여기서 윤활유는 펌프하우징(100) 하부에 설치된 윤활유주입구(200)를 통해 플런저(120)의 외주면과 펌프배럴(130)의 내주면 사이의 간극에 주입되어 플런저(120)와 펌프배럴(130)의 마찰력을 감소시켜 플런저(120)가 원활하게 기동할 수 있게 하는 것이다.The lubricating oil is injected into the gap between the outer circumferential surface of the plunger 120 and the inner circumferential surface of the pump barrel 130 through the lubricating oil inlet 200 installed at the lower part of the pump housing 100 to provide frictional force between the plunger 120 and the pump barrel 130. By reducing the plunger 120 to be able to start smoothly.

또한 윤활유는 화살표와 같이 플런저가이드(150) 하측에 위치하는 구동부(300)로 이동하여 플런저(120)를 기동시키는 왕복샤프트(310)의 운동 마찰력을 감소시켜 작동이 원할하게 이루어지도록 한 후, 엔진 내에 별도로 설치된 챔버로 회수되는 것이다.In addition, the lubricating oil is moved to the driving unit 300 located below the plunger guide 150 as shown by the arrow to reduce the kinetic friction force of the reciprocating shaft 310 for activating the plunger 120 so that the operation is made smoothly, the engine It is recovered to a chamber installed separately in the chamber.

이때 챔버 내에 회수된 윤활유는 윤활유주입구(200)를 통해 재공급됨과 아울러 엔진 내 여러 작동부로 공급되어 반복적으로 순환하게 되는 것이다.At this time, the lubricating oil recovered in the chamber is re-supplied through the lubricating oil inlet 200 and is supplied to various operating parts in the engine to circulate repeatedly.

그러나 상기와 같은 종래의 연료 분사펌프의 경우에는 펌프하우징(100) 상부에 유입된 연료(HFO) 일부가 플런저(120)와 펌프배럴(130)의 간극을 따라서 하측으로 새어나오게 되고, 이 연료는 펌프배럴(130) 내부의 윤활유와 섞이게 되어 혼합오일(HFO+MDO)을 형성하게 되는 것이다.However, in the case of the conventional fuel injection pump as described above, a portion of the fuel (HFO) introduced into the pump housing 100 is leaked downward along the gap between the plunger 120 and the pump barrel 130, the fuel is The pump barrel 130 is mixed with the lubricating oil to form a mixed oil (HFO + MDO).

이러한 혼합오일이 각 부품의 클리어런스(clearance)나, 동작여부에 따라서 왕복샤프트(310)가 설치된 부분으로 이동하여 윤활유 저장 챔버로 회수된 후 순환하게 되는 것이다.The mixed oil is circulated after being recovered to the lubricating oil storage chamber by moving to the part where the reciprocating shaft 310 is installed according to the clearance or operation of each component.

이와 같이 종래의 연료 분사펌프는 오염된 혼합오일이 대부분의 중속 및 고속엔진에서 시스템오일과 섞여 오염을 일으킴으로써 윤활유(Lubricating Oil)의 교체주기를 단축시킬 뿐 아니라, 각 부품의 원활한 작동을 방해하거나 고착시키는 문제점이 있었다.
Thus, conventional fuel injection pumps not only shorten the replacement cycle of lubricating oil by contaminating the mixed oil with system oil in most medium speed and high speed engines, but also prevent the smooth operation of each component or There was a problem of adhering.

본 발명은 상기와 같은 문제점을 해결하기 위해 안출한 것으로서, 본 발명의 목적은 플런저가이드에 드레인홀을 형성함과 동시에 엄브렐러부를 설치하여 연료와 혼합된 혼합오일이 상기 드레인홀과 엄브렐러부에 의해 외부로 분리 배출되도록 함으로써, 오염된 혼합오일이 엔진 시스템 내부로 유입되는 것을 방지하고, 또한 윤활유의 오염을 최소화하여 윤활유의 교체 주기를 연장시킬 수 있게 하는 것이다.
The present invention has been made to solve the above problems, an object of the present invention is to form a drain hole in the plunger guide and at the same time to install the umbrella portion of the mixed oil mixed with the fuel by the drain hole and the umbrella portion outside In order to prevent the contaminated mixed oil from flowing into the engine system and to minimize the contamination of the lubricant, it is possible to extend the replacement cycle of the lubricant.

상기 목적을 달성하기 위하여 본 발명은 연료흡입구와 플런저가이드가 설치되는 펌프하우징과 상기 펌프하우징에 삽입 설치되는 펌프배럴을 구비하고, 상기 플런저가이드에 결합되는 플런저를 상기 펌프배럴을 따라 기동시켜 고압연료를 엔진에 분사하는 연료 분사펌프에 있어서,In order to achieve the above object, the present invention includes a pump housing having a fuel inlet and a plunger guide installed therein and a pump barrel inserted into the pump housing, and the plunger coupled to the plunger guide is started along the pump barrel to pressurize the high pressure fuel. In the fuel injection pump for injecting the engine,

상기 플런저가이드는 내부가 비어 있고 상부가 개방되며 내측 하부에는 다수개의 관통공이 형성된 스프링가이드를 구비하되, 상기 플런저가이드의 바닥면에는 상기 관통공에 대응되게 다수개의 드레인홀이 형성되고, 외측 하단면에는 상기 드레인홀을 통과하는 혼합오일을 안내할 수 있게 둘레를 따라 하향 돌출된 엄브렐러부가 설치된다.The plunger guide is empty inside and has an open top and a spring guide having a plurality of through holes formed at the inner bottom thereof, wherein a plurality of drain holes are formed at the bottom surface of the plunger guide to correspond to the through holes, and the outer bottom surface thereof. An umbrella portion protruding downward along the circumference is installed to guide the mixed oil passing through the drain hole.

여기서 상기 스프링가이드의 관통공과 상기 플런저가이드의 드레인홀은 스프링가이드와 플런저가이드의 둘레를 따라 다수개가 방사상으로 구비되는 것이 바람직하다.Here, the through hole of the spring guide and the drain hole of the plunger guide are preferably provided radially along the circumference of the spring guide and the plunger guide.

또한 상기 엄브렐러부는 일정 직경의 환형으로 구비될 수 있다.In addition, the umbrella portion may be provided in an annular shape of a predetermined diameter.

또 상기 드레인홀은 하부로 이동할수록 외측 방향으로 일정 각도 경사지게 관통 형성되는 것이 바람직하다.
In addition, the drain hole is preferably formed to penetrate at an angle in an outward direction as it moves downward.

이상에서 설명한 바와 같이, 본 발명은 윤활유와 연료 및 혼합오일의 영역이 확실하게 구분되도록 하여 혼합오일에 의해 윤활유가 오염되는 것을 방지할 수 있게 함으로써, 윤활유의 지속적인 사용이 가능할 뿐 아니라, 윤활유의 교체주기가 증대되어 현저한 비용 절감의 효과가 있고, 또한 오염된 윤활유의 시스템 내부 진입이 차단되어 각 부품의 작동 불량이나 고착화를 방지할 수 있는 효과가 있다.
As described above, the present invention ensures that the areas of the lubricating oil and the fuel and the mixed oil can be reliably separated, thereby preventing contamination of the lubricating oil by the mixed oil, thereby enabling continuous use of the lubricating oil and replacing the lubricating oil. The period is increased, which has a significant cost saving effect, and also prevents contaminant lubricants from entering the system and prevents malfunction or fixation of each component.

도 1은 종래의 연료 분사펌프의 단면도,
도 2는 본 발명의 엄브렐러 플런저가이드가 구비된 연료 분사펌프의 단면도,
도 3은 도 2의 플런저가 상방으로 이동한 상태의 단면도,
도 4는 본 발명에 구비된 플런저가이드의 단면도와 배면도,
도 5는 본 발명의 스프링가이드의 단면도와 배면도,
도 6은 본 발명의 엄브렐러 플런저가이드가 구비된 연료 분사펌프의 윤활유의 흐름도,
도 7은 본 발명의 엄브렐러 플런저가이드가 구비된 연료 분사펌프의 부분 확대도이다.
1 is a cross-sectional view of a conventional fuel injection pump,
2 is a cross-sectional view of a fuel injection pump equipped with an umbrella plunger guide of the present invention;
3 is a cross-sectional view of the plunger of FIG. 2 moved upward;
4 is a cross-sectional view and a rear view of the plunger guide provided in the present invention;
5 is a cross-sectional view and a rear view of the spring guide of the present invention;
Figure 6 is a flow chart of the lubricating oil of the fuel injection pump with umbrella plunger guide of the present invention,
7 is a partially enlarged view of a fuel injection pump equipped with an umbrella plunger guide of the present invention.

이하 본 발명에 대하여 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the drawings.

도 2는 본 발명의 엄브렐러 플런저가이드가 구비된 연료 분사펌프의 단면도를 나타낸 것이고, 도 3은 도 2의 엄브렐러 플런저가이드가 상방으로 이동한 상태의 연료 분사펌프의 단면도를 나타낸 것이다.2 is a cross-sectional view of a fuel injection pump having an umbrella plunger guide of the present invention, and FIG. 3 is a cross-sectional view of a fuel injection pump in a state in which the umbrella plunger guide of FIG. 2 is moved upward.

도시된 바와 같이, 연료 분사펌프는 펌프하우징(100) 상부에 한 쌍의 연료흡입구(110)가 서로 마주보도록 설치되고, 펌프하우징(100) 내부에는 펌프배럴(130)이 삽입 설치된다.As shown, the fuel injection pump is installed so that a pair of fuel inlet 110 facing each other on the pump housing 100, the pump barrel 130 is inserted into the pump housing 100.

한편 펌프하우징(100) 내측 하부에는 스프링(140)과 플런저가이드(10)가 구비된다.Meanwhile, a spring 140 and a plunger guide 10 are provided at an inner lower portion of the pump housing 100.

이때 플런저(120)는 연료흡입구(110)로부터 유입된 연료(HFO)를 펌프하우징(100) 상부의 연료밸브(인젝터)로 가압 이동시키는 것으로서, 하단부가 플런저가이드(10)의 중앙부에 결합되어 플런저가이드(10)의 상,하 왕복 운동에 따라 펌프배럴(130)의 내측에서 상,하로 슬라이딩 왕복 운동함으로써, 연료흡입구(110)로부터 펌프배럴(130) 내부로 주입된 연료를 연료밸브(인젝터)로 고압 이송시켜 분사하게 되는 것이다.At this time, the plunger 120 is to pressurize and move the fuel (HFO) introduced from the fuel inlet 110 to the fuel valve (injector) in the upper portion of the pump housing 100, the lower end is coupled to the center portion of the plunger guide 10 By sliding reciprocating up and down inside the pump barrel 130 in accordance with the up and down reciprocating motion of the guide 10, the fuel injected into the pump barrel 130 from the fuel inlet 110 to the fuel valve (injector) High pressure transfer is to be injected.

이때 펌프하우징(100) 내측 하부에는 플런저가이드(10)가 상,하 방향으로 슬라이딩 가능하도록 설치되고, 플런저가이드(10) 내부에는 스프링(140)과 스프링가이드(50)가 설치된다. At this time, the plunger guide 10 is installed in the lower part of the pump housing 100 so as to be slidable in the up and down directions, and the spring 140 and the spring guide 50 are installed in the plunger guide 10.

따라서 플런저(120)는 플런저가이드(50)와 함께 상,하 방향으로 왕복 이동하게 되고, 스프링(140)은 도 3에 도시된 바와 같이 압축된 후, 탄성력에 의해 플런저가이드(10)를 원상 복귀시키는 역할을 함으로써, 플런저(120)와 플런저가이드(10)의 상,하 왕복 운동을 지속적으로 반복 가능하도록 하는 것이다.Therefore, the plunger 120 is reciprocated in the up and down direction together with the plunger guide 50, the spring 140 is compressed as shown in Figure 3, after the plunger guide 10 is returned to its original state by the elastic force By doing so, the up and down reciprocating motion of the plunger 120 and the plunger guide 10 is to be continuously repeatable.

한편 플런저가이드(10)의 하측부에는 플런저가이드(10)를 지지함과 동시에 상,하로 왕복 운동시키기 위한 구동부(300)가 설치된다.On the other hand, the lower portion of the plunger guide 10 is provided with a driving unit 300 for supporting the plunger guide 10 and reciprocating up and down.

구동부(300)는 상,하로 왕복 운동 가능한 왕복샤프트(310)가 결합되고, 왕복샤프트(310) 하단에는 캠(350)(도1에 도시함)이 연결되는 것이다.The driving unit 300 is a reciprocating shaft 310 that can be reciprocated up and down is coupled, the cam 350 (shown in Figure 1) is connected to the lower end of the reciprocating shaft 310.

따라서 왕복샤프트(310)는 캠(350)의 회전에 의해 상,하로 왕복 운동하여 플런저가이드(10)와 플런저(120)를 상,하로 왕복 운동시킴으로써 지속적인 연료의 고압 송출이 가능하도록 하는 것이다.Therefore, the reciprocating shaft 310 reciprocates up and down by the rotation of the cam 350 to reciprocate the plunger guide 10 and the plunger 120 up and down to enable continuous high pressure delivery of fuel.

이때 플런저(120)와 플런저가이드(10)는 펌프배럴(130)과 펌프하우징(100) 내에서 슬라이딩 왕복 운동을 하기 때문에 각각의 접촉면에서 마찰이 발생하게 되고, 이러한 마찰을 방지함과 동시에 원활한 슬라이딩 운동이 가능하도록 윤활유(LO:Lubrication Oil)가 주입된다.At this time, since the plunger 120 and the plunger guide 10 slide and reciprocate in the pump barrel 130 and the pump housing 100, friction occurs at each contact surface, and at the same time prevents such friction and smooth sliding. Lubrication oil (LO) is injected to allow movement.

윤활유는 펌프하우징(100)의 하부에 설치되는 윤활유주입구(200)를 통해 주입된다.Lubricating oil is injected through the lubricating oil inlet 200 is installed in the lower portion of the pump housing (100).

따라서 윤활유는 펌프하우징(100) 내부에 설치되는 윤활유공급라인(도시하지 않음)을 통해 플런저가이드(10)의 작동부, 플런저(120)의 외주면과 펌프배럴(130)의 내주면 사이의 간극에 주입되어 플런저(120)의 마찰력을 감소시켜 플런저(120)가 원활하게 기동할 수 있게 하는 것이다.Therefore, the lubricating oil is injected into the gap between the operating part of the plunger guide 10, the outer circumferential surface of the plunger 120 and the inner circumferential surface of the pump barrel 130 through a lubricating oil supply line (not shown) installed inside the pump housing 100. By reducing the friction force of the plunger 120 is to enable the plunger 120 to smoothly start.

또한 구동부(300)의 왕복샤프트(310)의 슬라이딩 운동부에도 별도로 설치되는 윤활유주입구(도시하지 않음)를 통해 윤활유가 주입된 후 저장 챔버로 회수되어 순환하게 된다.In addition, after lubricating oil is injected through a lubricating oil inlet (not shown) that is separately installed in the sliding motion of the reciprocating shaft 310 of the driving unit 300, the lubricating oil is recovered and circulated.

그러나 연료(HFO)는 플런저(120)의 운동에 따라 플런저(120)와 펌프배러(130) 사이의 간극을 통해 소량이 하측으로 이동하여 윤활유와 섞이게 되고, 이러한 오염된 혼합오일은 플런저가이드(10)의 운동에 따라 하방으로 이동하여 왕복샤프트(310)의 습동면(360)을 따라 Re-circulation Area로 이동하여 구동부(300)의 윤활유도 오염시키게 되는 것이다.However, a small amount of fuel (HFO) is moved to the lower side through the gap between the plunger 120 and the pump barrel 130 and mixed with the lubricating oil according to the movement of the plunger 120, this contaminated mixed oil is plunger guide (10) In accordance with the movement of the) to move downward along the sliding surface 360 of the reciprocating shaft 310 to the re-circulation area to contaminate the lubricating oil of the drive unit 300.

따라서 이를 방지하기 위하여 플런저가이드(10)의 외측 하단면에 설치된 엄브렐러부(Umbrella Part)(30)가 펌프하우징(100)의 윤활구역과 구동부(300)의 윤활구역을 분리시키고, 혼합오일이 펌프하우징(100) 하부에 설치된 배출구(250)를 통해 외부로 배출되도록 함으로써, 혼합오일이 구동부(300)로 이동하는 것을 차단하게 되는 것이다.Therefore, in order to prevent this, the umbrella part (Umbrella Part) 30 installed on the outer bottom surface of the plunger guide 10 separates the lubrication zone of the pump housing 100 and the lubrication zone of the driving unit 300, and the mixed oil pumps By discharging to the outside through the discharge port 250 installed in the lower housing 100, it is to block the movement of the mixed oil to the drive unit (300).

이하 도 4,5를 참조하여 본 발명의 엄브렐러부가 구비된 플런저가이드를 상세히 설명한다.Hereinafter, the plunger guide provided with the umbrella portion of the present invention will be described in detail with reference to FIGS. 4 and 5.

도 4(a),(b)는 본 발명에 구비된 플런저가이드(10)의 단면도와 배면도를 각각 나타낸 것이고, 도 5(a),(b)는 스프링가이드(50)의 단면도와 배면도를 각각 나타낸 것이다.Figure 4 (a), (b) is a cross-sectional view and a rear view of the plunger guide 10 provided in the present invention, respectively, Figure 5 (a), (b) is a cross-sectional view and a rear view of the spring guide 50. Are shown respectively.

플런저가이드(10)는 도 4에 도시된 바와 같이, 내부가 비어 있고 상부가 개방된 일정 깊이의 하우징 형상으로 구비된다.As shown in FIG. 4, the plunger guide 10 is provided in a shape of a housing having a predetermined depth with an empty inside and an open top.

이때 플런저가이드(10)의 바닥면 둘레에는 다수개의 드레인홀(15)이 방사상으로 일정 간격 이격되도록 관통 설치된다.At this time, a plurality of drain holes 15 are installed through the bottom surface of the plunger guide 10 so as to be radially spaced apart from each other.

드레인홀(15)은 혼합오일이 통과하는 부분으로서, 하부로 갈수록 외측 방향으로 일정 각도 경사지도록 설치되어 혼합오일이 외측 방향으로 흘러가도록 유도하는 것이다.The drain hole 15 is a portion through which the mixed oil passes. The drain hole 15 is installed to be inclined at an angle toward the outer side toward the lower portion to induce the mixed oil to flow outward.

한편 플런저가이드(10)의 외측 하단면에는 엄브렐러부(30)가 일정 높이로 하향 돌출 형성된다.On the other hand, the umbrella portion 30 is protruded downward to a certain height on the outer bottom surface of the plunger guide (10).

엄브렐러부(30)는 플런저가이드(10)의 하단면 둘레를 따라 환형(環形)으로 돌출 형성되며, 드레인홀(15)을 통과하는 혼합오일이 왕복샤프트(310)의 습동면으로 이동하지 않고, 배출구(250)로 이동하여 외부로 배출될 수 있도록 안내하는 역할을 하는 것이다.Umbrella portion 30 is formed to protrude in an annular shape around the bottom surface of the plunger guide 10, the mixed oil passing through the drain hole 15 does not move to the sliding surface of the reciprocating shaft 310, It is to serve to guide the discharge port 250 to be discharged to the outside.

이때 드레인홀(15)은 엄블렐러부(30)의 외측면에 인접되도록 적정 간격으로 설치되는 것이다.In this case, the drain holes 15 are installed at appropriate intervals so as to be adjacent to the outer surface of the umbrella portion 30.

여기서 엄브렐러부(30)는 플런저가이드(10)의 이동거리 등을 고려하여 적절한 높이로 형성될 수 있을 것이다.Here, the umbrella portion 30 may be formed at an appropriate height in consideration of the moving distance of the plunger guide 10 and the like.

한편 스프링가이드(50)는 도 2,3에 도시된 바와 같이, 플런저가이드(10)의 내측 바닥면에 고정 결합되어 스프링(140)을 지지하게 된다.Meanwhile, as shown in FIGS. 2 and 3, the spring guide 50 is fixedly coupled to the inner bottom surface of the plunger guide 10 to support the spring 140.

스프링가이드(50)에는 플런저가이드(10)의 드레인홀(15)에 대응되게 다수개의 관통홈(55)이 형성되고, 일측에는 플런저결합홈(52)이 형성된다.A plurality of through grooves 55 are formed in the spring guide 50 to correspond to the drain holes 15 of the plunger guide 10, and a plunger coupling groove 52 is formed at one side thereof.

따라서 스프링가이드(50)가 플런저가이드(10)에 결합되면 관통홈(55)과 드레인홀(15)은 동일 선상에 위치하게 됨으로써, 혼합오일은 관통홈(55)과 드레인홀(15)을 경유하여 하향 이동하게 되는 것이다.Therefore, when the spring guide 50 is coupled to the plunger guide 10, the through groove 55 and the drain hole 15 are located on the same line, so that the mixed oil passes through the through groove 55 and the drain hole 15. Will be moved downward.

이하 도 6과 도 7을 참조하여 본 발명의 엄브렐러 플런저가이드가 구비된 연료 분사펌프의 작동 과정을 설명한다.Hereinafter, an operation process of the fuel injection pump equipped with the umbrella plunger guide of the present invention will be described with reference to FIGS. 6 and 7.

먼저 연료(HFO)는 도 6에 도시된 바와 같이, 연료흡입구(110)를 통해 플러저(120) 상부에 주입되며, 윤활유(LO)는 펌프하우징(100)에 설치된 연료주입구(200)와 구동부(300)에 설치된 연료주입구(도시하지 않음)를 통해 펌프하우징(100)과 왕복샤프트(310) 주변에 주입된다.First, as shown in FIG. 6, the fuel HFO is injected into the upper portion of the flusher 120 through the fuel inlet 110, and the lubricating oil LO is installed at the fuel inlet 200 and the driving unit installed in the pump housing 100. It is injected around the pump housing 100 and the reciprocating shaft 310 through a fuel inlet (not shown) installed at 300.

상기와 같이 윤활유가 주입된 상태에서 왕복샤프트(310)와 플런저가이드(10)가 상,하로 슬라이딩 왕복 운동하게 되면, 이에 연동되어 플런저(120)도 슬라이딩 운동하면서 주입된 연료를 펌프하우징(100) 상부의 연료밸브로 송출하게 되는 것이다.When the reciprocating shaft 310 and the plunger guide 10 slide reciprocally up and down in the state in which the lubricating oil is injected as described above, the plunger 120 also slides in conjunction with the plunger 120 to pump the injected fuel. It will be sent to the upper fuel valve.

이때 연료(HFO)는 플런저(120)의 운동에 따라 펌프하우징(100) 하부의 윤활유(LO)와 섞이게 되고, 이러한 오염된 혼합오일(LO+HFO)은 구동부(300)의 왕복샤프트(310)의 습동면(360)으로 이동하지 않고, 화살표(270)와 같이, 스프링가이드(50)의 관통홈(55)과 플런저가이드(10)의 드레인홀(15)을 통과하여 엄브렐러부(30)의 외측면을 따라 흘러내린 후 펌프하우징(100) 하단에 설치된 배출구(250)를 통해 배출되는 것이다.At this time, the fuel (HFO) is mixed with the lubricating oil (LO) of the lower part of the pump housing 100 in accordance with the movement of the plunger 120, this contaminated mixed oil (LO + HFO) is the reciprocating shaft 310 of the drive unit 300 Rather than moving to the sliding surface 360, as shown by the arrow 270, the through-hole 55 of the spring guide 50 and the drain hole 15 of the plunger guide 10 pass through the umbrella portion 30. After flowing down along the outer surface is to be discharged through the discharge port 250 installed at the bottom of the pump housing (100).

한편 구동부(300) 내부에 주입된 연료는 혼합오일과 섞이지 않고, 청정한 상태를 유지한 상태로 저장 챔버로 이동한 후 반복적인 순환 과정을 거치게 되는 것이다.On the other hand, the fuel injected into the driving unit 300 is not mixed with the mixed oil, is moved to the storage chamber in a clean state and undergoes an iterative circulation process.

이때 플런저가이드(10)의 드레인홀(15)과 엄브렐러부(30)는 플런저가이드(10)의 작동 과정에서 혼합오일이 구동부(300)로 이동하지 못하고 배출구(250) 방향으로 안내되도록 함으로써, 혼합오일이 왕복샤프트(310)의 습동면(360)으로 이동하는 것을 차단하게 되는 것이다.At this time, the drain hole 15 and the umbrella portion 30 of the plunger guide 10 are mixed by allowing the mixed oil to be guided in the direction of the outlet 250 without moving to the driving unit 300 during the operation of the plunger guide 10. The oil is to block the movement to the sliding surface 360 of the reciprocating shaft (310).

따라서 본 발명은 플런저가이드(10)가 펌프하우징(100)의 윤활구역과 구동부(300)의 윤활구역을 분리시킴으로써, 플런저(120)의 작동 과정에서 연료(HFO)와 혼합된 혼합오일(LO+HFO)이 구동부(300)를 경유하여 엔진 시스템 내부로 유입되는 것을 방지하게 되어 엔진 시스템 보호는 물론 윤활유(LO)의 교체 주기를 연장할 수 있게 하는 것이다.Therefore, in the present invention, the plunger guide 10 separates the lubrication zone of the pump housing 100 and the lubrication zone of the driving unit 300, thereby mixing oil (LO +) mixed with fuel (HFO) during the operation of the plunger 120. The HFO is prevented from being introduced into the engine system via the driving unit 300, thereby protecting the engine system and extending the replacement cycle of the lubricant LO.

이상, 상기의 실시 예는 단지 설명의 편의를 위해 예시로서 설명한 것에 불과하므로 특허청구범위를 한정하는 것은 아니며, 본 발명의 기술 범주 내에서 다양한 변형이 가능할 것이다.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities.

* 도면의 주요 부분에 대한 부호의 설명 *
10,150 : 플런저가이드
15 : 드레인홀
30 : 엄브렐러부 50 : 스프링가이드
52 : 플런저결합홈 55 : 드레인홀
100 : 펌프하우징 110 : 연료흡입구
120 : 플런저 130 : 펌프배럴
140 : 스프링 200 : 윤활유주입구
250 : 배출구 300 : 구동부
310 : 왕복샤프트 350 : 캠
360 : 습동면Description of the Related Art [0002]
10,150: Plunger Guide
15: drain hole
30: umbrella portion 50: spring guide
52: plunger coupling groove 55: drain hole
100: pump housing 110: fuel inlet
120: plunger 130: pump barrel
140: spring 200: lubricating oil inlet
250: outlet 300: drive unit
310: reciprocating shaft 350: cam
360: sliding surface

Claims (4)

연료흡입구와 플런저가이드가 설치되는 펌프하우징과 상기 펌프하우징에 삽입 설치되는 펌프배럴을 구비하고, 상기 플런저가이드에 결합되는 플런저를 상기 펌프배럴을 따라 기동시켜 고압연료를 엔진에 분사하는 연료 분사펌프에 있어서,
상기 플런저가이드는 내부가 비어 있고 상부가 개방되며 내측 하부에는 다수개의 관통공이 형성된 스프링가이드를 구비하되,
상기 플런저가이드의 바닥면에는 상기 관통공에 대응되게 다수개의 드레인홀이 형성되고, 외측 하단면에는 상기 드레인홀을 통과하는 혼합오일을 안내할 수 있게 둘레를 따라 하향 돌출된 엄브렐러부가 설치되는 엄브렐러 플런저가이드가 구비된 연료 분사펌프.A pump housing having a fuel inlet and a plunger guide installed therein and a pump barrel inserted into the pump housing, and starting the plunger coupled to the plunger guide along the pump barrel to a fuel injection pump for injecting high pressure fuel into the engine. In
The plunger guide is empty inside and has an open top and a spring guide having a plurality of through-holes formed in the lower part of the inner side,
A plurality of drain holes are formed on the bottom surface of the plunger guide to correspond to the through holes, and an umbrella plunger having an umbrella part protruding downward along the circumference thereof to guide the mixed oil passing through the drain hole on the outer bottom surface thereof. Guided fuel injection pump. 제1항에 있어서,
상기 스프링가이드의 관통공과 상기 플런저가이드의 드레인홀은 스프링가이드와 플런저가이드의 둘레를 따라 다수개가 방사상으로 구비되는 것을 특징으로 하는 엄브렐러 플런저가이드가 구비된 연료 분사펌프.The method of claim 1,
The through hole of the spring guide and the drain hole of the plunger guide is a fuel injection pump having an umbrella plunger guide, characterized in that a plurality of radially provided along the circumference of the spring guide and the plunger guide. 제2항에 있어서,
상기 엄브렐러부는 일정 직경의 환형으로 구비되는 것을 특징으로 하는 엄브렐러 플런저가이드가 구비된 연료 분사펌프.The method of claim 2,
The umbrella portion is a fuel injection pump having an umbrella plunger guide, characterized in that the annular of a predetermined diameter. 제1항 내지 제3항 중 어느 한 항에 있어서,
상기 드레인홀은 하부로 이동할수록 외측 방향으로 일정 각도 경사지게 관통 형성되는 것을 특징으로 하는 엄브렐러 플런저가이드가 구비된 연료 분사펌프.4. The method according to any one of claims 1 to 3,
The drain hole is a fuel injection pump provided with an umbrella plunger guide, characterized in that the penetrating is formed to be inclined at an angle in the outward direction as it moves downward.
KR1020110095015A 2011-09-21 2011-09-21 Fuel injection pump with umbrella plunger guide KR101204635B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101365900B1 (en) 2012-11-14 2014-02-25 현대중공업 주식회사 Fuel injection pump with umbrella plunger guide

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01136640A (en) 1987-11-24 1989-05-29 Matsushita Electric Ind Co Ltd Ultrasonic probe
JP2007303313A (en) 2006-05-09 2007-11-22 Yanmar Co Ltd Fuel injection pump
JP2009097517A (en) 2007-10-18 2009-05-07 Delphi Technologies Inc Pump assembly and tappet for the same
JP2011518271A (en) 2008-03-26 2011-06-23 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Pumps, especially fuel high-pressure pumps

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01136640A (en) 1987-11-24 1989-05-29 Matsushita Electric Ind Co Ltd Ultrasonic probe
JP2007303313A (en) 2006-05-09 2007-11-22 Yanmar Co Ltd Fuel injection pump
JP2009097517A (en) 2007-10-18 2009-05-07 Delphi Technologies Inc Pump assembly and tappet for the same
JP2011518271A (en) 2008-03-26 2011-06-23 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Pumps, especially fuel high-pressure pumps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101365900B1 (en) 2012-11-14 2014-02-25 현대중공업 주식회사 Fuel injection pump with umbrella plunger guide

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