KR20060113652A - Inner gear-wheel pump comprising reinforced channels - Google Patents

Inner gear-wheel pump comprising reinforced channels Download PDF

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Publication number
KR20060113652A
KR20060113652A KR1020067002826A KR20067002826A KR20060113652A KR 20060113652 A KR20060113652 A KR 20060113652A KR 1020067002826 A KR1020067002826 A KR 1020067002826A KR 20067002826 A KR20067002826 A KR 20067002826A KR 20060113652 A KR20060113652 A KR 20060113652A
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KR
South Korea
Prior art keywords
housing
fuel pump
duct
fuel
ribs
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KR1020067002826A
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Korean (ko)
Inventor
홀거 바르트
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지멘스 악티엔게젤샤프트
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Publication of KR20060113652A publication Critical patent/KR20060113652A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Abstract

The invention relates to a gerotor fuel pump (2) comprising ribs (18, 19), which are located in channels (16, 17) that are configured as inlets and outlets and that are situated in housing parts (8, 9). The ribs (18, 19) are positioned transversely to the maximal extension of the cross-sections of the channels (16, 17), producing a high degree of stability in said channels (16, 17). The housing parts (8, 9) are composed of plastic.

Description

보강 채널을 포함하는 내치 기어휠 펌프{INNER GEAR-WHEEL PUMP COMPRISING REINFORCED CHANNELS}Internal gearwheel pump with reinforcement channel {INNER GEAR-WHEEL PUMP COMPRISING REINFORCED CHANNELS}

본 발명은, 연료를 차량의 연료 탱크로부터 공급하는 제로터(gerotor) 연료 펌프로서, 하우징을 구비하고, 두 하우징 부품 사이에 설치되는 로터 쌍을 구비하며, 하우징에 배치되는 긴 입구 덕트 및 출구 덕트를 구비하는 연료 펌프에 관한 것이다.SUMMARY OF THE INVENTION The present invention is a gerotor fuel pump for supplying fuel from a fuel tank of a vehicle, comprising: a long inlet duct and an outlet duct having a housing and having a pair of rotors installed between two housing parts and disposed in the housing. It relates to a fuel pump having a.

이러한 유형의 연료 펌프는 특히 디젤 연료를 차량에 공급하는 데 사용되고 있으며 실제로 공지되어 있다. 제로터 연료 펌프의 로터 쌍은, 외치(external toothing)를 구비한 내측 로터와, 내치(internal toothing)를 구비한 외측 로터를 구비한다. 이때, 외치는 일반적으로 내치에 비해 하나의 치(toothing)를 더 구비한다. 내측 로터의 회전 중심은 외측 로터의 회전 중심에 대해 편위된다. 입구 덕트 및 출구 덕트는 일반적으로 대향 하우징 부품들에 배치된다. 이로써, 유동이 연료 펌프를 통해 축방향으로 유동될 수 있게 된다.Fuel pumps of this type are especially used to supply diesel fuel to vehicles and are known in practice. The rotor pair of the rotor rotor pump has an inner rotor with external toothing and an outer rotor with internal toothing. At this time, the outer tooth generally has one tooth more than the inner tooth. The center of rotation of the inner rotor is biased with respect to the center of rotation of the outer rotor. The inlet duct and the outlet duct are generally arranged in opposing housing parts. This allows the flow to flow axially through the fuel pump.

이러한 공지된 연료 펌프의 단점은, 긴 입구 덕트 및 출구 덕트가 하우징의 안정성에 악영향을 미친다는 점이다. 실제로, 이러한 단점에는, 로터 쌍의 반경 방향 고정을 위해 강재 보강 링을 하우징 부품에 배치시키고 로터 쌍의 축방향 제한 을 위해 2개의 세라믹 판이나 금속 판을 하우징 부품에 배치시킴으로써 대처할 수 있다. 결과적으로, 공지된 연료 펌프는 매우 고가가 된다.A disadvantage of this known fuel pump is that the long inlet and outlet ducts adversely affect the stability of the housing. In practice, this disadvantage can be countered by placing the steel reinforcement ring in the housing part for radial fixation of the rotor pair and placing two ceramic plates or metal plates in the housing part for the axial limitation of the rotor pair. As a result, known fuel pumps become very expensive.

본 발명의 목적은, 아주 간단하면서도 효율적인 비용으로 제조할 수 있는 서두에 언급한 유형의 연료 펌프를 제공하는 것이다.It is an object of the present invention to provide a fuel pump of the type mentioned at the outset which can be manufactured at a very simple and efficient cost.

이러한 목적은, 본 발명에 따르면, 적어도 하나의 덕트가 하우징 보강을 위한 적어도 하나의 리브를 구비함으로써 달성된다.This object is achieved according to the invention by the at least one duct having at least one rib for housing reinforcement.

이러한 구성에 의하면, 덕트가 리브에 의해 보강되어, 하우징이 덕트의 영역에서 굽혀지는 현상을 방지할 수 있게 된다. 그 결과, 하우징은 덕트의 영역에서 아주 높은 안정성을 갖게 된다. 이러한 높은 안정성은, 출구 덕트를 구비한 하우징의 영역에 큰 힘이 작용하기 때문에 출구에서 특히 바람직하다. 결과적으로, 힘에 의해 덕트 영역에서 발생될 수 있는 하우징의 굽힘 현상이 없어지게 된다. 따라서, 하우징은 매우 얇으면서도 효율적인 비용의 소재로 제조될 수 있게 된다. 이와 같이, 본 발명에 따른 연료 펌프에는 별도의 보강 링이 설치될 필요가 없어서, 본 발명에 따른 연료 펌프는 아주 간단하면서도 효율적인 비용으로 제조될 수 있게 된다.According to this configuration, the duct is reinforced by the ribs, thereby preventing the housing from bending in the area of the duct. As a result, the housing has very high stability in the region of the duct. This high stability is particularly desirable at the outlet because a large force acts on the area of the housing with the outlet duct. As a result, the bending of the housing, which can be generated in the duct region by the force, is eliminated. Thus, the housing can be made of a very thin and cost-effective material. As such, the fuel pump according to the present invention does not need to be provided with a separate reinforcing ring, so that the fuel pump according to the present invention can be manufactured at a very simple and efficient cost.

다수의 리브들은 일례로 격자 방식으로 덕트를 덮을 수 있다. 본 발명의 또 다른 바람직한 실시예에 따르면, 적어도 하나의 리브가 덕트 단면의 최장 길이에 대해 교차하여 배치되며 또한 덕트의 크기를 제한하는 하우징의 대향 가장자리들을 서로 연결시키는 경우에, 리브의 수가 아주 적게 유지될 수 있게 된다. 또한, 리브의 크기와 그에 따른 리브의 교축 효과(throttling effect)가 아주 낮게 유지될 수 있게 된다. The multiple ribs can cover the duct in a lattice fashion, for example. According to another preferred embodiment of the invention, the number of ribs is kept very small when at least one rib is intersected with respect to the longest length of the duct cross section and interconnects opposite edges of the housing which limit the size of the duct. It becomes possible. In addition, the size of the ribs and thus the throttling effect of the ribs can be kept very low.

덕트에 인접한 하우징의 영역과 리브가 일체로 제조되면, 본 발명에 따른 연료 펌프의 조립 비용을 추가로 절감시킬 수 있게 된다.If the area of the housing adjacent to the duct and the rib are made integral, it is possible to further reduce the assembly cost of the fuel pump according to the invention.

적어도 하나의 하우징 부품이 플라스틱으로 제조되면, 본 발명에 따른 연료 펌프는 아주 효율적인 비용으로 제조될 수 있게 된다. 공지된 연료 펌프의 세라믹 판에 비해 낮은 플라스틱 하우징 부품의 강도는 덕트의 리브에 의해 보상된다.If at least one housing part is made of plastic, the fuel pump according to the invention can be produced at a very efficient cost. The strength of the plastic housing parts, which is low compared to the ceramic plates of known fuel pumps, is compensated by the ribs in the duct.

본 발명의 또 다른 바람직한 변형 실시예에 따르면, 하우징 부품들이 스크류에 의해 서로 체결되고 하나의 플라스틱 하우징 부품이 금속 너트 수용부를 구비하는 경우에, 하우징 부품이 구조적으로 아주 간단하게 결합될 수 있게 된다. 금속 너트로 인해 본 발명에 따른 연료 펌프의 충분한 안정성이 달성된다.According to another preferred variant of the invention, where the housing parts are fastened to each other by screws and one plastic housing part has a metal nut receiving portion, the housing parts can be joined structurally very simply. Due to the metal nut sufficient stability of the fuel pump according to the invention is achieved.

본 발명에서는 여러 가지 실시예들이 가능하다. 본 발명의 기본 원리를 보다 명확히 파악할 수 있게 하기 위해서, 이하에서는 도면에 도시된 일 실시예를 참고로 하여 본 발명을 상세히 설명한다.Various embodiments are possible in the present invention. In order to more clearly understand the basic principles of the present invention, the following describes the present invention in detail with reference to an embodiment shown in the drawings.

도 1은 본 발명에 따른 연료 펌프를 구비한 공급 유닛의 단면도이다.1 is a cross-sectional view of a supply unit with a fuel pump according to the invention.

도 2는 도 1에 도시된 본 발명에 따른 연료 펌프의 분해도이다.2 is an exploded view of the fuel pump according to the invention shown in FIG. 1.

도 1은 디젤 연료를 차량의 연료 탱크(미도시)로부터 연료 펌프(2)가 전기 모터(1)에 의해 구동되는 내연 기관으로 공급하는 공급 유닛의 단면도를 도시하고 있다. 연료 펌프(2)는, 전기 모터(1)의 샤프트(3)에 연결되고 외측 로터(5)와 함께 로터 쌍(6)을 형성하는 내측 로터(4)를 구비한다. 외측 로터(5)는 환형 부재(7) 내에 반경 방향으로 그리고 하우징(10)의 두 하우징 부품(8, 9) 사이에 축방향으로 설치된다. 커플링(11)이 전기 모터(1)의 샤프트(3) 상에 배치되며 내측 로터(4)와 고정되어 회전가능하게 결합된다. 또한, 샤프트(3)는 전기 모터(1)로부터 이격된 연료 펌프(2)의 하우징 부품(8)에서 부시(12)와의 반경 방향 베어링을 구비한다. 펌프 덮개(13)는 흡기관(14)을 구비한다. 연료 펌프(2)로부터 이격된 공급 유닛의 단부에는 내연 기관으로 연통되는 연료 라인용 연결관(15)이 구비된다. 이로써, 공급된 연료가 공급 유닛을 통해 축방향으로 유동될 수 있게 된다.1 shows a cross-sectional view of a supply unit for supplying diesel fuel from a fuel tank (not shown) of a vehicle to an internal combustion engine driven by an electric motor 1 by a fuel pump 2. The fuel pump 2 has an inner rotor 4 which is connected to the shaft 3 of the electric motor 1 and forms a rotor pair 6 together with the outer rotor 5. The outer rotor 5 is installed radially in the annular member 7 and axially between the two housing parts 8, 9 of the housing 10. A coupling 11 is arranged on the shaft 3 of the electric motor 1 and is fixedly and rotatably coupled to the inner rotor 4. The shaft 3 also has a radial bearing with the bush 12 in the housing part 8 of the fuel pump 2 spaced from the electric motor 1. The pump cover 13 has an intake pipe 14. At the end of the supply unit spaced from the fuel pump 2 is provided a fuel line connecting tube 15 which communicates with the internal combustion engine. This allows the supplied fuel to flow axially through the supply unit.

도 2는 도 1에 도시된 연료 펌프(2)의 분해도로서, 하우징 부품(8, 9) 각각이 긴 덕트(16, 17)를 구비하고 있는 상태를 도시하고 있다. 도 1의 전기 모터(1) 부근에 배치되고 하우징 부품(9)에 배치되는 덕트(17)는 연료 펌프(2)의 출구 역할을 하며, 도 1의 펌프 덮개(13) 부근에 배치되고 하우징 부품(8)에 배치되는 덕트(16)는 연료 펌프(2)의 입구를 형성한다. 하우징 부품은(8, 9)은 각각 리브(18, 19)를 구비하며, 이러한 리브는 덕트(16, 17)의 최장 길이에 대해 교차하여 배치된다. 리브(18, 19)는 각각의 덕트(16, 17)의 크기를 제한하는 하우징 부품(8, 9)의 대향 가장자리들을 연결시킨다. 이러한 리브(18, 19)로 인해 덕트(16, 17)의 영역에서 소정의 안정성이 보장됨으로써, 하우징 부품(8, 9)이 플라스틱으로 제조될 수 있게 된다. 도 2는 또한 하우징 부품(8, 9)이 스크류(20)에 의해 서로 연결되는 상태를 도시하고 있다. 스크류(20)는 한 하우징 부품(8)에 배치되는 강재 너트(21) 내로 체결된다. 하우징 부품(8)은 홈으로서 형성되는 너트(21) 수용부(22)를 구비한다.FIG. 2 is an exploded view of the fuel pump 2 shown in FIG. 1, showing a state in which the housing parts 8, 9 each have an elongated duct 16, 17. The duct 17 disposed near the electric motor 1 of FIG. 1 and disposed on the housing part 9 serves as an outlet of the fuel pump 2, and is arranged near the pump cover 13 of FIG. 1 and the housing part. The duct 16 arranged in 8 forms the inlet of the fuel pump 2. The housing parts 8, 9 have ribs 18, 19, respectively, which ribs are arranged intersecting with respect to the longest length of the ducts 16, 17. The ribs 18, 19 connect the opposite edges of the housing parts 8, 9 which limit the size of the respective ducts 16, 17. These ribs 18, 19 ensure certain stability in the region of the ducts 16, 17, so that the housing parts 8, 9 can be made of plastic. 2 also shows a state in which the housing parts 8, 9 are connected to each other by screws 20. The screw 20 is screwed into a steel nut 21 which is arranged in one housing part 8. The housing part 8 has a nut 21 receiving portion 22 formed as a groove.

Claims (5)

연료를 차량의 연료 탱크로부터 공급하는 제로터 연료 펌프로서, 하우징을 구비하고, 두 하우징 부품 사이에 설치되는 로터 쌍을 구비하며, 상기 하우징에 배치되는 긴 입구 덕트 및 출구 덕트를 구비하는 연료 펌프에 있어서,A zero rotor fuel pump for supplying fuel from a fuel tank of a vehicle, comprising: a fuel pump having a housing, a rotor pair installed between two housing parts, and an elongated inlet duct and an outlet duct disposed in the housing. In 상기 덕트(16, 17) 중 하나 이상은 하우징(10)을 보강하는 하나 이상의 리브(18, 19)를 구비하는 것을 특징으로 하는 연료 펌프.Fuel pump, characterized in that at least one of the ducts (16, 17) has one or more ribs (18, 19) to reinforce the housing (10). 제1항에 있어서,The method of claim 1, 상기 하나 이상의 리브(18, 19)는, 덕트(16, 17) 단면의 최장 길이에 대해 교차하여 배치되고, 덕트(16, 17)의 크기를 제한하는 하우징(10)의 대향 가장자리들을 서로 연결시키는 것을 특징으로 하는 연료 펌프.The one or more ribs 18, 19 are arranged to intersect with respect to the longest length of the cross section of the ducts 16, 17 and connect the opposite edges of the housing 10 to limit the size of the ducts 16, 17. A fuel pump, characterized in that. 제1항 또는 제2항에 있어서,The method according to claim 1 or 2, 상기 리브(18, 19)는 덕트(16, 17)에 인접한 하우징(10)의 영역과 일체로 형성되는 것을 특징으로 하는 연료 펌프.The rib (18, 19) is a fuel pump, characterized in that formed integrally with the area of the housing (10) adjacent the duct (16, 17). 선행하는 항들 중 어느 한 항에 있어서,The method according to any of the preceding claims, 상기 하우징 부품(8, 9) 중 하나 이상은 플라스틱으로 제조되는 것을 특징으로 하는 연료 펌프.Fuel pump, characterized in that at least one of the housing parts (8, 9) is made of plastic. 선행하는 항들 중 어느 한 항에 있어서,The method according to any of the preceding claims, 상기 하우징 부품(8, 9)은 스크류에 의해 서로 체결되고, 하나의 플라스틱 하우징 부품(8)은 금속 너트(21) 수용부(22)를 구비하는 것을 특징으로 하는 연료 펌프.The fuel pump, characterized in that the housing parts (8, 9) are fastened to each other by screws, and that one plastic housing part (8) has a metal nut (21) receiving portion (22).
KR1020067002826A 2003-09-09 2004-07-30 Inner gear-wheel pump comprising reinforced channels KR20060113652A (en)

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DE10341841A DE10341841A1 (en) 2003-09-09 2003-09-09 According to the gerotor principle working fuel pump
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JP2007504398A (en) 2007-03-01
DE10341841A1 (en) 2005-04-07
EP1664539B1 (en) 2008-06-11
DE502004007363D1 (en) 2008-07-24
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WO2005026552A1 (en) 2005-03-24
EP1664539A1 (en) 2006-06-07

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