KR20020076526A - lubricating device of fuel pump in the LPG vehicles - Google Patents
lubricating device of fuel pump in the LPG vehicles Download PDFInfo
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- KR20020076526A KR20020076526A KR1020010016438A KR20010016438A KR20020076526A KR 20020076526 A KR20020076526 A KR 20020076526A KR 1020010016438 A KR1020010016438 A KR 1020010016438A KR 20010016438 A KR20010016438 A KR 20010016438A KR 20020076526 A KR20020076526 A KR 20020076526A
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- pumping
- fuel pump
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/14—Feeding by means of driven pumps the pumps being combined with other apparatus
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/046—Arrangements for driving diaphragm-type pumps
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
- F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
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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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
- F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Fuel Cell (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
본 발명은 엘피지차량용 연료펌프에 관한 것으로, 보다 상세하게는 모터구동부의 회전구동부와 연동되는 다이어프램 조립체에 의한 연료의 펌핑작업과 동시에 모터부의 회전축과 연동회전되어 펌핑부의 내부에 수납된 윤활유를 모터부의 상측에서 비산시키는 순환스크류를 장착하여 모터구동부의 냉각 및 윤활작용을 실시하도록 한 엘피지차량용 연료펌프의 윤활장치에 관한 것이다.The present invention relates to a fuel pump for an LPI vehicle, and more particularly, a pumping operation of fuel by a diaphragm assembly that is interlocked with a rotation driving unit of a motor driving unit, and lubricating oil that is interlocked with a rotating shaft of the motor unit and stored in the pumping unit. The present invention relates to a lubrication device for an LPG vehicle fuel pump equipped with a circulation screw scattered from the upper side to perform cooling and lubrication of the motor driving unit.
일반적으로 차량용 연료펌프는 연료배관상에 설치되는 인라인 방식의 연료펌프와, 연료탱크 내에 장착되는 인탱크 방식의 연료펌프로 구분되는데 대부분의 연료탱크는 인탱크 방식이 적용되고 있다.In general, a vehicle fuel pump is classified into an in-line fuel pump installed on a fuel pipe and an in-tank fuel pump mounted in a fuel tank. Most fuel tanks are in-tank.
도 1에 도시된 도면은 인탱크형 연료펌프의 대표적인 구조를 보인 것으로, 연료펌프의 구성은 펌핑부(A)와 펌프를 구동하는 모터부(B)로 구분되어 있어 모터 하우징(1)의 내부에 펌핑부(A)는 하우징(1)의 하부인 연료흡입구(2)측에 설치되어 있고, 모터부(B)는 하우징(1)의 상부인 연료배출구(3)측에 위치되어 있다.Figure 1 shows a representative structure of the in-tank fuel pump, the configuration of the fuel pump is divided into a pumping unit (A) and a motor unit (B) for driving the pump inside the motor housing (1) The pumping part A is provided on the fuel inlet 2 side which is the lower part of the housing 1, and the motor part B is located on the fuel outlet 3 side which is the upper part of the housing 1.
펌핑부(A)는 펌프케이스(4)의 내부에 회전축(5)에 장착된 임펠러(5a)가 구비되는 구성이며, 모터부(B)는 회전축(5)에 장착된 전기자(6)와, 이에 대응되도록 하우징(1)의 내주면에 구비된 마그네트(7)로 구성되어 있다. 하우징(1)의 상면에는 릴리프 밸브(8) 및 단자(9)가 설치되어 있고, 연료배출구(3)에는 체크밸브(10)가 설치되어 있다. 부호 F는 연료를 나타낸 것이다.Pumping unit (A) is a configuration in which the impeller (5a) mounted on the rotating shaft (5) inside the pump case (4), the motor portion (B) armature (6) mounted on the rotating shaft (5), Correspondingly, the magnet 7 is provided on the inner circumferential surface of the housing 1. The relief valve 8 and the terminal 9 are provided in the upper surface of the housing 1, and the check valve 10 is provided in the fuel discharge port 3. As shown in FIG. The symbol F represents fuel.
이와 같이 구성되는 차량용 인탱크형 연료펌프는 단자(9)를 통해 전력이 공급되면, 전기자(6)가 회전되어 전기자(6)에 압입고정된 회전축(5)이 회전됨으로써 임펠러의 회전에 의해 연료(F)가 연료흡입구(2)를 통해 흡입되어 연료배출구(7)를 통해 연료공급파이프측으로 공급되는 것이다.In the in-tank fuel pump for a vehicle configured as described above, when electric power is supplied through the terminal 9, the armature 6 is rotated to rotate the rotary shaft 5, which is press-fit and fixed to the armature 6, so that the fuel is rotated by the impeller. (F) is sucked through the fuel inlet (2) is supplied to the fuel supply pipe side through the fuel outlet (7).
이러한 차량용 연료펌프는 모터의 대한 별도의 윤활장치를 없더라도 연료펌프의 내부에 연료가 충진된 상태로 모터부를 통과하면서 연료가 토출되기 때문에 자연적으로 모터에 대한 윤활작용이 실시된다.Such a vehicle fuel pump naturally performs lubrication on the motor because the fuel is discharged while passing through the motor unit while the fuel is filled in the fuel pump even without a separate lubrication device for the motor.
그러나 액화 석유 가스(Liquified Petroleum Gas;이하 LPG라 칭함) 차량용 연료는 특성상 점도가 거의 없기 때문에 펌핑부가 베인식 혹은 임펠러 방식의 적용이 어렵고, 만약 베인식 혹은 임펠러 방식을 적용하게 되면 가솔린에 비해 상당한 공동화(cavitation)현상이 발생되어 국부적으로 압력변동 및 기포가 터지는 과정에서 펌프부가 손상되는 문제가 있다.However, the liquid fuel of Liquified Petroleum Gas (hereinafter referred to as LPG) has almost no viscosity, so it is difficult to apply the vane or impeller method to the pumping part. There is a problem that the pump part is damaged in the process of cavitation phenomenon and the pressure fluctuation and bubble bursting locally.
또한 LPG 연료는 특성상 모터부에서 발생되는 열로 인해 연료탱크 내의 온도가 변화되어 LPG 연료가 기상상태로 변화하게 되는 문제가 있다.In addition, LPG fuel has a problem in that the temperature in the fuel tank is changed due to the heat generated from the motor portion, the LPG fuel is changed to a gaseous state.
아울러 LPG 연료 자체가 윤활성을 갖지 않기 때문에 모터의 구동부가 마모되는 문제가 있다.In addition, since LPG fuel itself does not have lubricity, there is a problem in that the driving part of the motor is worn.
상기한 바와 같은 여러가지 문제점을 감안하여 안출한 본 발명의 목적은 베인식 또는 임펠러 방식을 배제하여 편심되어 회전하는 축에 의해 구동되는 구동부재에 의한 행정변화에 의해 액상의 연료를 펌핑하도록 하려는 것이다.The object of the present invention devised in view of the various problems as described above is to exclude the vane or impeller method to pump the liquid fuel by the stroke change by the drive member driven by the eccentrically rotating shaft.
본 발명의 다른 목적은 연료펌프의 모터부에서 발생되는 열을 냉각하기에 적합하도록 한 것이다.Another object of the present invention is to be suitable for cooling the heat generated in the motor portion of the fuel pump.
본 발명의 또 다른 목적은 모터의 구동부의 마모를 방지하려는 것이다.Another object of the present invention is to prevent wear of the drive portion of the motor.
도 1은 종래 가솔린차량용 연료탱크 내장타입의 연료펌프의 단면도.1 is a cross-sectional view of a fuel pump of a fuel tank built-in type for a conventional gasoline vehicle.
도 2는 일반적인 엘피지차량용 연료펌프의 연료공급 구성도.Figure 2 is a fuel supply configuration of a typical LPG vehicle fuel pump.
도 3은 본 발명 장치의 일실시예가 적용된 엘피지차량용 연료펌프의 단면도.Figure 3 is a cross-sectional view of the fuel pump for an LLP vehicle to which an embodiment of the present invention is applied.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
21 ; 펌프 케이스 22 ; 모터 케이스21; Pump case 22; Motor case
23 ; 연료배출구 27 ; 다이어프램 조립체23; Fuel outlet 27; Diaphragm assembly
31 ; 모터하우징 32 ; 회전축31; Motor housing 32; Axis of rotation
33 ; 스테이터 34 ; 로터33; Stator 34; Rotor
37 ; 순환스크류 39 ; 코일스프링37; Circulating screw 39; Coil spring
40 ; 윤활유통로40; Lubrication channel
A ; 모터부 B ; 펌핑부A; Motor part B; Pumping part
F ; LPG 연료 O ; 윤활유F; LPG fuel O; lubricant
상기의 목적을 달성하기 위한 본 발명은 케이스의 내측에 회전축이 결합된 로터와, 로터에 회전력을 부여하는 스테이터로 구성되는 모터부와; 상기 모터부의 회전운동을 직선운동으로 전환하여 LPG 연료를 공급하기 위해 다이프램조립체를 구비한 펌핑부를 포함하며; 상기 펌핑부는 다이어프램조립체를 가로막으로 하여 LPG 연료실과 윤활유실로 구획되고, 상기 모터부에는 상기 회전축과 연동회전되어 상기 펌핑부의 내부에 수납된 윤활유를 모터부의 상측으로 비산시키는 순환스크류를 회전축에 장착하며, 상기 순환스크류의 상부에는 상기 회전축과 연동회전되도록 순환스크류를 탄력지지하는 탄성부재를 설치하는 것을 특징으로 한다.The present invention for achieving the above object is a rotor coupled to the rotating shaft inside the case, and a motor unit consisting of a stator for applying a rotational force to the rotor; A pumping part having a diaphragm assembly for supplying LPG fuel by converting the rotational motion of the motor part into a linear motion; The pumping part is partitioned into an LPG fuel chamber and a lubricating oil chamber with the diaphragm assembly as a diaphragm, and the motor part is equipped with a circulating screw on the rotating shaft for interlocking with the rotating shaft to scatter the lubricant contained in the pumping part to the upper side of the motor part. An upper portion of the circulation screw is characterized in that to install an elastic member for elastically supporting the circulation screw so as to interlock with the rotary shaft.
바람직하기로는 상기 케이스에는 비산되는 윤활유가 하강시 상기 펌핑부로 회수되어 순환가능하도록 복수개의 윤활유통로가 형성되어 있다.Preferably, the case is provided with a plurality of lubrication flow paths so that the lubricating oil that is scattered can be recovered to the pumping part and circulated when descending.
이와 같은 본 발명의 바람직한 실시예를 첨부도면에 의거하여 보다 상세하게 설명한다.This preferred embodiment of the present invention will be described in more detail based on the accompanying drawings.
첨부도면 도 2는 액상 LPG 연료분사방식을 적용하는 엘피지차량용 연료펌프의 연료공급 구성도이고, 도 3은 본 발명 장치의 일실시예가 적용된 엘피지차량용연료펌프의 단면도이다.2 is a fuel supply configuration diagram of an LPG vehicle fuel pump applying a liquid LPG fuel injection method, and FIG. 3 is a cross-sectional view of an LPG vehicle fuel pump to which an embodiment of the present invention is applied.
도시한 바와 같이, 통상의 LPG 차량용 연료탱크가 적용되는 연료공급장치는 연료탱크(11)에 장착되어 있는 펌프(12)에 의해 LPG 연료가 압송됨으로써 액상으로 유지되어 레귤레이터 유닛(13)의 차단밸브(14)를 거쳐 엔진(15)의 인젝터(16)로 공급된다. 인젝터(16)에서는 엔진의 운전조건 및 연료의 조건에 따라 적절한 연료를 분사하게 되며, 분사되고 남는 연료는 레귤레이터 유닛(13)의 압력센서(17)와 압력 레귤레이터(18)를 통해 연료탱크(11)로 회수된다.As shown, a fuel supply device to which a conventional LPG vehicle fuel tank is applied is maintained in a liquid state by LPG fuel being pumped by the pump 12 mounted on the fuel tank 11 to shut off the regulator unit 13. It is supplied to the injector 16 of the engine 15 via 14. The injector 16 injects the appropriate fuel in accordance with the operating conditions of the engine and the fuel conditions, and the injected and remaining fuel is fuel tank 11 through the pressure sensor 17 and the pressure regulator 18 of the regulator unit 13. ) Is recovered.
본 발명에 일실시예에 의한 연료펌프는 도 3에 도시한 바와 같이, 펌프의 구성이 모터부(A)와 펌핑부(B)로 구획되어 있어 펌프 케이스(21)의 내부 하부 연료흡입구(22)측에는 펌핑부(B)가 형성되어 있고, 모터 케이스(22)의 내부 상부 연료배출구(23)측에는 모터부(A)가 형성되어 있다.In the fuel pump according to the embodiment of the present invention, as shown in FIG. 3, the configuration of the pump is divided into the motor part A and the pumping part B, so that the lower fuel intake port 22 inside the pump case 21 is provided. The pumping part B is formed in the side of the motor, and the motor part A is formed in the inner upper fuel discharge port 23 side of the motor case 22.
모터 케이스(22)의 내부에는 모터 하우징(31)의 중앙에는 회전축(32)이 압입고정되어 있고, 회전축(32)의 외주면에는 스테이터(33)가 설치되어 있고, 하우징(31)의 내주면에는 로터(34)가 부착고정되어 있으며, 회전축(32)과 연동되어 있다.The rotating shaft 32 is press-fitted and fixed in the center of the motor housing 31 inside the motor case 22. The stator 33 is provided on the outer peripheral surface of the rotating shaft 32, and the rotor is provided on the inner peripheral surface of the housing 31. 34 is attached and fixed, and is interlocked with the rotating shaft 32.
모터 케이스(22)는 플라스틱과 같은 열전달이 작은 재질로 형성되어 있기 때문에 최대한 탱크 내부로 열발산을 차단하게 된다.Since the motor case 22 is formed of a small heat transfer material such as plastic, heat dissipation is blocked as much as possible into the tank.
회전축(32)의 하단부에는 편심캠(24)이 장착되어 있으며, 편심캠(24)의 외주부에는 편심캠(24)에 의해 연동되어 직선운동하는 로드(25)가 스프링(26)에 의해 탄력지지된 다이어프램 조립체(27)에 의해 지지된 상태로 설치되어 있다.An eccentric cam 24 is mounted at the lower end of the rotating shaft 32, and a rod 25 that is linearly interlocked by the eccentric cam 24 is elastically supported by the spring 26 at the outer circumference of the eccentric cam 24. It is installed in a state supported by the diaphragm assembly 27.
연료흡입구(22)는 펌프 케이스(21) 및 모터 케이스(22)의 외벽을 관통하여 형성된 연료통로(28)에 의해 연료배출구(23)와 연결되어 있으며, 연료흡입구(22)는 체크밸브(29)가 구비되어 있어 연료흡입구(22)로 유입되는 LPG 연료는 다이어프램 조립체(27)의 외측에 충진된 상태가 되어 연료통로(28)를 거쳐서 연료배출구(23)측으로 배출되도록 구성되어 있다.The fuel inlet 22 is connected to the fuel outlet 23 by a fuel passage 28 formed through the outer wall of the pump case 21 and the motor case 22, and the fuel inlet 22 is a check valve 29 LPG fuel flowing into the fuel inlet 22 is filled in the outer side of the diaphragm assembly 27 and is discharged to the fuel outlet port 23 through the fuel passage 28.
다이어프램 조립체(27)의 내측에는 윤활유(O)가 충진된 상태이고, 회전축(32)에는 최하단의 장착된 편심캠(24)의 상측에 롤베어링(36)이 장착되어 있고, 롤베어링(36)의 상측에 윤활유(O)를 모터부(A)의 상측으로 비산시켜 모터부(A)의 윤활 및 냉각작용을 실시하는 순환스크류(37)가 장착되어 있으며, 회전축(32)의 상단부에는 볼베어링(38)이 장착되어 있고, 순환스크류(37)와 볼베어링(38) 사이에는 코일스프링(39)이 개재되어 있다. 또한, 펌프 케이스(21)의 내부에는 다수의 윤활유통로(40)가 형성되어 있으며, 부호 41은 벤트홀이다.The inside of the diaphragm assembly 27 is filled with lubricating oil (O), the roll shaft (36) is mounted on the rotary shaft (32) above the lowermost mounted eccentric cam (24), and the roll bearing (36). At the upper side of the rotating oil (37) to the upper side of the motor portion (A), the circulating screw (37) for lubricating and cooling the motor (A) is mounted, and the upper end of the rotating shaft (32) has a ball bearing ( 38) is mounted, and the coil spring 39 is interposed between the circulation screw 37 and the ball bearing 38. In addition, a plurality of lubricating oil passages 40 are formed in the pump case 21, and reference numeral 41 denotes a vent hole.
이와 같이 구성되어 있는 본 발명에 의한 LPG 차량용 연료펌프의 윤활 및 냉각 작용을 설명한다.The lubrication and cooling action of the LPG vehicle fuel pump according to the present invention configured as described above will be described.
본 발명의 실시예에서 구체적으로 적용하고 있는 모터부(A)는 장시간 사용시에도 카본이 LPG 연료에서 융해되는 문제점을 갖지 않는 브러쉬리스 DC 모터가 적용되며, 내연기관의 속도에 따라 가변제어되고, 불필요한 모터구동부하를 제거한다.The motor unit A, which is specifically applied in the embodiment of the present invention, is applied to a brushless DC motor which does not have a problem in that carbon melts in LPG fuel even when used for a long time, and is variably controlled according to the speed of the internal combustion engine and is unnecessary. Remove the motor drive load.
연료펌프에서 열이 발생되는 부분은 모터의 코일이 권선된 부분과,회전축(32)부분 및 지속적으로 스트로크가 변동되는 다이어프램 조립체(27)부분이며, 장시간 구동시에는 축(32)을 지지하는 베어링 부분에 마모가 발생되는 문제가 있으므로, 본 발명에서는 상술한 바와 같이 열이 발생되는 부분의 냉각작용 및 베어링부의 윤활작용을 동시에 구현하기 위하여 모터의 내측 공간 및 LPG 연료(F)가 충진되어 있지 않은 다이어프램(26)의 내측 공간에서 윤활유(O)를 순환시키고자 하는 것이다.The heat generating portion of the fuel pump is a portion in which the coil of the motor is wound, the rotation shaft 32 portion, and the diaphragm assembly 27 portion in which the stroke is continuously changed, and a bearing supporting the shaft 32 when driven for a long time. Since there is a problem that wear occurs in the portion, in the present invention, in order to simultaneously realize the cooling action of the heat-generating portion and the lubrication of the bearing portion as described above, the inner space of the motor and the LPG fuel (F) are not filled. This is to circulate the lubricant O in the inner space of the diaphragm 26.
모터부(A)에 전기적인 신호가 인가되면 로터(34)가 회전되면서 회전축(32)이 회전하게 되어 회전축(32)의 하단에 장착된 편심캠(24)의 편심된 원운동이 로드(25)의 직선왕복운동으로 전환되면서 다이어프램 조립체(27)가 전후진 펌핑동작을 반복하게 된다. 이러한 다이어프램 조립체(27)의 펌핑동작에 의해 연료(F)가 연료통로(28)를 따라서 상측으로 상승되어 연료배출구(23)를 통해 엔진으로 공급된다.When an electric signal is applied to the motor unit A, the rotor 34 is rotated and the rotating shaft 32 is rotated so that the eccentric circular motion of the eccentric cam 24 mounted at the lower end of the rotating shaft 32 is loaded (25). The diaphragm assembly 27 repeats the forward and backward pumping operation as it is converted into a linear reciprocating motion. By the pumping operation of the diaphragm assembly 27, the fuel F is raised upward along the fuel passage 28 and supplied to the engine through the fuel outlet 23.
회전축(32)의 회전시 코일스프링(39)에 의해 하방향으로 탄성지지된 상태인 순환스크류(37)가 연동회전되며, 이러한 순환스크류(37)의 회전에 의해 스크류의 나선방향으로 윤활유(0)가 상승하게 되며, 순환스크류(37)와 연접되어 회전축(32)에 장착된 코일스프링(39)에 의해 계속해서 상측으로 상승됨으로써 모터부(A)의 상측에서 도면에서와 같이 비산되는 것으로서 케이스(21)의 내벽과 회전축(32) 사이의 공간을 통해 모터부(A)의 상측으로 상승되어 모터부(A)의 상부에서 비산된다.When the rotating shaft 32 rotates, the circulating screw 37 which is elastically supported in the downward direction by the coil spring 39 is interlockedly rotated, and the lubricating oil in the spiral direction of the screw is rotated by the rotation of the circulating screw 37. ) Ascends and is continuously lifted upward by the coil spring 39 mounted on the rotating shaft 32 in contact with the circulation screw 37 so as to be scattered as shown in the figure above the motor part A. It rises above the motor part A through the space between the inner wall of the 21 and the rotating shaft 32, and is scattered on the upper part of the motor part A. As shown in FIG.
이처럼 상승되는 윤활유(O)는 회전축(32) 및 베어링부(36)(38)를 통과하게 되고, 비산되어 하강되는 윤활유(O)는 모터의 내측 스테이터(33)의 외주면을 타고흐르게 된다. 따라서 윤활유는 모터부(A)의 각 부품을 통과하는 과정에서 냉각 및 윤활작용을 실시하게 되는 것이며, 윤활유(O)는 비산 또는 하강시 윤활유통로(40)를 통과하게 된다. 한편, 이러한 윤활유(O)의 냉각은 다이어프램 조립체(27)의 상대측에서 펌핑되는 액상의 연료(F)에 의해 이루어지게 된다.The lubricating oil O thus raised passes through the rotating shaft 32 and the bearing parts 36 and 38, and the lubricating oil O scattered and lowered flows on the outer circumferential surface of the inner stator 33 of the motor. Therefore, the lubricating oil is to perform the cooling and lubricating action in the course of passing through each component of the motor portion (A), the lubricating oil (O) is passed through the lubricating oil passage 40 during the scattering or falling. On the other hand, the cooling of the lubricating oil (O) is made by the liquid fuel (F) pumped on the opposite side of the diaphragm assembly (27).
모터 케이스(22)의 상단에 천공되어 있는 벤트홀(41)을 통해서는 윤활유실의 압력이 기상압력(=액상압력)과 동일한 압력을 유지하도록 함으로써 다이어프램 조립(27)에 과부하를 방지하여 순수한 모터부(A)의 구동에 의해 펌핑압이 발생되는 것이다.Through the vent hole 41 drilled on the upper end of the motor case 22, the pressure of the lubricating oil chamber is maintained at the same pressure as the gas phase pressure (= liquid pressure), thereby preventing the overload on the diaphragm assembly 27, thereby providing a pure motor. The pumping pressure is generated by the driving of the unit (A).
이상에서 설명한 바와 같이, 본 발명에 의한 엘피지차량용 연료펌프의 윤활장치에 의하면, LPG 연료펌프의 내부를 연료실과 윤활유실로 구획한 상태에서 펌핑 구동시 모터부의 회전축에 의해 윤활유를 모터부의 상부측에 비산시킴으로써 모터의 회전축 및 베어링, 코일권선부 및 다이어프램 조립체 등의 냉각이 실시됨과 아울러 베어링부의 윤활 작용을 실시하여 부품 수명을 연장시키고, 제품의 성능을 향상시키는 효과가 있다.As described above, according to the lubrication apparatus of the LPG vehicle fuel pump according to the present invention, in the state where the LPG fuel pump is divided into the fuel chamber and the lubricating oil chamber, the lubricating oil is scattered on the upper side of the motor part by the rotating shaft of the motor during pumping operation. By doing so, cooling of the rotating shaft of the motor and the bearing, the coil winding part and the diaphragm assembly, etc. are performed, and the bearing part is lubricated to prolong the life of the parts and improve the performance of the product.
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Cited By (6)
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WO2009025505A1 (en) * | 2007-08-21 | 2009-02-26 | Korea Institute Of Machinery & Materials | Non-contact positive displacement fuel pump for lpg vehicle |
KR200446495Y1 (en) * | 2007-12-05 | 2009-11-04 | (주)모토닉 | Liquefied petroleum injection fuel pump |
KR100936724B1 (en) * | 2008-01-16 | 2010-01-14 | (주)모토닉 | In-tank type pump |
KR101022736B1 (en) * | 2009-04-27 | 2011-03-22 | (주)모토닉 | Fuel Pump having Guide Ring |
CN101994603A (en) * | 2009-08-26 | 2011-03-30 | 现代自动车株式会社 | Fuel supplying system of LPI engine |
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KR100756528B1 (en) | 2007-03-23 | 2007-09-10 | (주)한엑스 | Lubrication and cooling apparatus of fuel pump for lpg vehicles |
KR100756529B1 (en) | 2007-03-23 | 2007-09-10 | (주)한엑스 | Lubrication and cooling apparatus of fuel pump for lpg vehicles |
KR100992012B1 (en) | 2008-12-01 | 2010-11-04 | (주)모토닉 | In-tank pump of an lpi system |
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JPH0756270B2 (en) * | 1990-05-09 | 1995-06-14 | 株式会社京浜精機製作所 | Electric pump |
JPH0579462A (en) * | 1991-04-10 | 1993-03-30 | Mitsuba Electric Mfg Co Ltd | Scroll pump |
US5375975A (en) * | 1993-12-27 | 1994-12-27 | Ford Motor Company | Fuel pump pre-swirl inlet channel |
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WO2009025505A1 (en) * | 2007-08-21 | 2009-02-26 | Korea Institute Of Machinery & Materials | Non-contact positive displacement fuel pump for lpg vehicle |
KR200446495Y1 (en) * | 2007-12-05 | 2009-11-04 | (주)모토닉 | Liquefied petroleum injection fuel pump |
KR100936724B1 (en) * | 2008-01-16 | 2010-01-14 | (주)모토닉 | In-tank type pump |
KR101022736B1 (en) * | 2009-04-27 | 2011-03-22 | (주)모토닉 | Fuel Pump having Guide Ring |
CN101994603A (en) * | 2009-08-26 | 2011-03-30 | 现代自动车株式会社 | Fuel supplying system of LPI engine |
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NL2010861C2 (en) * | 2013-05-24 | 2014-12-01 | Vialle Alternative Fuel Systems Bv | Liquefied petrol gas pump for displacing liquid lpg, housing for a pump chamber and fuel system comprising a lpg pump. |
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