KR20060063166A - Structure for decreasing an inside leakage oil of power steering pump - Google Patents

Structure for decreasing an inside leakage oil of power steering pump Download PDF

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Publication number
KR20060063166A
KR20060063166A KR1020040102264A KR20040102264A KR20060063166A KR 20060063166 A KR20060063166 A KR 20060063166A KR 1020040102264 A KR1020040102264 A KR 1020040102264A KR 20040102264 A KR20040102264 A KR 20040102264A KR 20060063166 A KR20060063166 A KR 20060063166A
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KR
South Korea
Prior art keywords
power steering
steering pump
vane
leakage
vanes
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KR1020040102264A
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Korean (ko)
Inventor
김재형
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현대자동차주식회사
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Priority to KR1020040102264A priority Critical patent/KR20060063166A/en
Publication of KR20060063166A publication Critical patent/KR20060063166A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • F04C14/226Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam by pivoting the cam around an eccentric axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D5/00Power-assisted or power-driven steering
    • B62D5/06Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/062Details, component parts
    • B62D5/063Pump driven by vehicle engine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D5/00Power-assisted or power-driven steering
    • B62D5/06Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/07Supply of pressurised fluid for steering also supplying other consumers ; control thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/40Flow control
    • F15B2211/45Control of bleed-off flow, e.g. control of bypass flow to the return line

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

본 발명은 누설길이가 길어지게 베인의 형상을 변형하여 내부 누설량을 줄이도록 한 파워 스티어링 펌프의 내부 누유 저감 구조에 관한 것으로, 캠 링의 일측부에서 회전하는 로터 및 상기 로터에 상호 등간격으로 형성된 다수의 간극에 베인이 설치된 파워 스티어링 펌프에서, 상기 베인의 외측 종부의 형상이 타원형으로 이루어진다.The present invention relates to an internal leakage reduction structure of a power steering pump in which a vane is deformed to reduce an internal leakage amount, and the rotor is rotated at one side of the cam ring and the rotor is formed at equal intervals. In power steering pumps in which vanes are provided in a plurality of gaps, the outer longitudinal portion of the vanes is elliptical.

파워 스티어링 펌프, 누유, 베인, 누설길이Power Steering Pump, Leakage, Vane, Leak Length

Description

파워 스티어링 펌프의 내부 누유 저감 구조{Structure for decreasing an inside leakage oil of power steering pump}Structure for reducing an inside leakage oil of power steering pump

도 1은 종래 파워 스티어링 펌프를 설명하기 위한 도면,1 is a view for explaining a conventional power steering pump,

도 2는 도 1의 로터(rotor)에 설치된 베인(vain)의 종부 형상을 도시한 도면,FIG. 2 is a view showing a longitudinal shape of a vane installed in the rotor of FIG. 1;

도 3은 도 2의 베인의 박리점을 도시한 도면,3 is a view showing a peeling point of the vane of FIG.

도 4는 본 발명의 실시예에 따른 파워 스티어링 펌프의 내부 누유 저감 구조를 설명하기 위한 도면,4 is a view for explaining an internal leakage reduction structure of a power steering pump according to an embodiment of the present invention;

도 5는 도 4의 베인의 박리점을 도시한 도면이다.5 is a view showing a peeling point of the vane of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 캠 링 12 : 로터10: cam ring 12: rotor

14, 16 : 베인14, 16: vane

본 발명은 파워 스티어링 펌프의 내부 누유 저감 구조에 관한 것으로, 보다 상세하게는 파워 스티어링 펌프내부에서 누설손실되는 오일량을 저감시키도록 한 구조에 관한 것이다.
The present invention relates to a structure for reducing oil leakage inside a power steering pump, and more particularly, to a structure for reducing the amount of oil leaked from the inside of a power steering pump.

종래 파워 스티어링 펌프는 도 1에 도시된 바와 같이 리저버로부터 오일을 빨아 들여서 기어박스에게로 토출해 주는 기능을 담당한다. 그 파워 스티어링 펌프는 캠 링(10)의 일측부에서 회전하는 로터(12)를 구비하고, 그 로터(12)의 외주연에는 내측방향으로 상호 등간격인 다수의 간극이 형성된다. 그리고, 상기 간극에는 도 2에서와 같은 베인(vain)(14)이 설치된다.Conventional power steering pump is responsible for the function to suck the oil from the reservoir as shown in Figure 1 to discharge to the gearbox. The power steering pump includes a rotor 12 that rotates on one side of the cam ring 10, and a plurality of gaps are formed on the outer circumference of the rotor 12 at equal intervals inwardly. In addition, a vane 14 as shown in FIG. 2 is provided in the gap.

상기 베인(14)의 끝 모양은 도 2 및 도 3에서와 같이 원형이고, 원형의 베인(14)은 누설 길이가 짧아 내부 누설을 막는데 비효과적이다. 또한, 상기 베인(14)의 박리점은 도 3에서와 같이 위치하므로, 내부 누설량이 많다. The vane 14 has a circular shape as shown in FIGS. 2 and 3, and the circular vanes 14 have a short leakage length, which is ineffective for preventing internal leakage. In addition, since the peeling point of the vane 14 is located as shown in Fig. 3, the amount of internal leakage is large.

이와 같이 종래 파워 스티어링 펌프는 누설 손실이 발생하게 되는데, 그 누설 손실로 인해 펌프의 효율이 떨어지며 연비에까지 영향을 미친다.As such, the conventional power steering pump has a leakage loss, and the leakage loss decreases the efficiency of the pump and affects fuel economy.

상기 누설 손실에 영향을 주는 인자로는 다음의 식Factors affecting the leakage loss are as follows.

Qs = (1/12)·(ΔP·b·h3/μl)을 보면 알 수 있다. 여기서, h는 누설 간극이고, l은 누설 통로의 길이이며, b는 통로의 폭이고, μ는 오일의 점성계수이다. This can be seen from Qs = (1/12) · (ΔP · b · h 3 / μl). Where h is the leakage gap, l is the length of the leak passage, b is the width of the passage, and μ is the viscosity coefficient of the oil.

즉, 누설 손실량(Qs)은 압력차(ΔP), 통로의 폭(b), 간극(h)의 3승에 비례하고, 통로의 길이(l)에 반비례한다. In other words, the leakage loss amount Qs is proportional to the square of the pressure difference ΔP, the width b of the passage, and the gap h, and is inversely proportional to the length l of the passage.

따라서, 누설 손실을 줄이기 위해서는 간극의 크기를 줄이는 것이 가장 효과적이겠으나, 간극의 크기가 너무 작으면 마찰이 심해져서 온도상승을 유발시킨다. 그로 인해 시스템 성능에 악영향을 끼친다.Therefore, in order to reduce the leakage loss, it is most effective to reduce the size of the gap, but if the size of the gap is too small, the friction is severe, causing the temperature rise. This adversely affects system performance.

본 발명은 상기한 종래의 문제점을 해결하기 위해 제안된 것으로, 본 발명의 목적은 누설길이가 길어지게 베인의 형상을 변형하여 내부 누설량을 줄이도록 한 파워 스티어링 펌프의 내부 누유 저감 구조를 제공함에 있다.The present invention has been proposed to solve the above problems, and an object of the present invention is to provide an internal leakage reduction structure of the power steering pump to reduce the internal leakage by modifying the shape of the vanes to increase the leakage length. .

상기와 같은 목적을 달성하기 위하여 본 발명의 바람직한 실시예에 따른 파워 스티어링 펌프의 내부 누유 저감 구조는, 캠 링의 일측부에서 회전하는 로터 및 상기 로터에 상호 등간격으로 형성된 다수의 간극에 베인이 설치된 파워 스티어링 펌프에 있어서,In order to achieve the above object, the internal oil leakage reduction structure of the power steering pump according to the preferred embodiment of the present invention includes a rotor rotating at one side of the cam ring and a plurality of vanes formed at equal intervals between the rotors. In the installed power steering pump,

상기 베인의 외측 종부의 형상이 타원형으로 이루어진 것을 특징으로 한다.
The shape of the outer longitudinal portion of the vane is characterized in that made of an oval.

이하, 첨부된 도면을 참조하여 본 발명의 실시예에 따른 파워 스티어링 펌프의 내부 누유 저감 구조에 대하여 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings will be described with respect to the internal leakage reduction structure of the power steering pump according to an embodiment of the present invention.

도 4는 본 발명의 실시예에 따른 파워 스티어링 펌프의 내부 누유 저감 구조를 설명하기 위한 도면이다. 도 4에서, 베인(16)은 상술한 바와 같이 캠 링(10)의 일측부에서 회전하는 로터(12)에 형성된 간극에 끼워지게 되는데, 그 베인(16)의 일측부(L)는 해당 간극의 내측에 위치하며, 베인(16)의 타측부(K)는 해당 간극에서 외측으로 돌출된다.4 is a view for explaining the internal leakage reduction structure of the power steering pump according to an embodiment of the present invention. In FIG. 4, the vanes 16 are fitted in the gaps formed in the rotor 12 rotating on one side of the cam ring 10 as described above, and one side L of the vanes 16 is the corresponding gap. Located on the inside of the vane 16, the other side (K) protrudes outward from the gap.

본 발명은 각각의 간극에서 외측으로 돌출된 베인(16)의 형상을 변형시킨 것으로서, 상기 베인(16)의 돌출 부위(K)가 싸이클용 헬멧과 같이 타원형으로 형성된다. The present invention is a modification of the shape of the vanes 16 protruding outward in each gap, the projecting portion (K) of the vanes 16 is formed in an elliptical like a helmet for the cycle.

이와 같이 상기 베인(16)의 돌출 부위(K)를 타원형으로 함으로써, 종래의 베인(14) 보다 누설 길이가 길게 되어 누설량이 적게 된다.Thus, by making elliptical protrusion part K of the said vane 16, a leak length becomes longer than the conventional vane 14, and a leakage amount becomes small.

그리고, 돌출 부위(K)가 타원형으로 된 본 발명의 베인(16)은 도 5에서와 같이 박리점이 후방에 위치하게 되므로, 유체속에서 운동시 저항을 최소화할 수 있으며 와류 방지에도 효과적이다.
In addition, since the vane 16 of the present invention having the protruding portion K has an elliptical shape, the peeling point is located at the rear side as shown in FIG.

한편, 본 발명은 상술한 실시예로만 한정되는 것이 아니라 본 발명의 요지를 벗어나지 않는 범위내에서 수정 및 변형하여 실시할 수 있고, 그러한 수정 및 변형이 가해진 기술사상 역시 이하의 특허청구범위에 속하는 것으로 보아야 한다.On the other hand, the present invention is not limited only to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, the technical idea to which such modifications and variations are also applied to the claims Must see

이상 상세히 설명한 바와 같이 본 발명에 따르면, 베인의 끝부의 형상을 싸이클용 헬멧과 같이 타원형으로 함으로써 종래의 베인보다 누설길이가 길게 되어 누설량이 적게 되고, 유체속에서 운동시 저항을 최소화하며 와류방지에도 효과적이다. As described in detail above, according to the present invention, the tip of the vane has an elliptical shape, such as a cycle helmet, so that the length of the leak is longer than that of the conventional vane, so that the amount of leakage is reduced, and the resistance during the movement in the fluid is minimized. effective.

Claims (1)

캠 링의 일측부에서 회전하는 로터 및 상기 로터에 상호 등간격으로 형성된 다수의 간극에 베인이 설치된 파워 스티어링 펌프에 있어서,A power steering pump provided with vanes in a plurality of gaps formed at equal intervals between a rotor rotating at one side of a cam ring and the rotor, 상기 베인의 외측 종부의 형상이 타원형으로 이루어진 것을 특징으로 하는 파워 스티어링 펌프의 내부 누유 저감 구조.An internal oil leakage reduction structure of the power steering pump, characterized in that the outer end of the vane is made of an elliptical shape.
KR1020040102264A 2004-12-07 2004-12-07 Structure for decreasing an inside leakage oil of power steering pump KR20060063166A (en)

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KR1020040102264A KR20060063166A (en) 2004-12-07 2004-12-07 Structure for decreasing an inside leakage oil of power steering pump

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56110591A (en) * 1980-02-06 1981-09-01 Matsushita Electric Ind Co Ltd Rotary type fluid machine
JPH109153A (en) * 1996-04-22 1998-01-13 Hitachi Metals Ltd Vane and manufacture thereof
JP2003307185A (en) * 2002-04-12 2003-10-31 Mitsubishi Motors Corp Vane pump
JP2004052711A (en) * 2002-07-23 2004-02-19 Kayaba Ind Co Ltd Vane pump
KR100471992B1 (en) * 2001-11-20 2005-03-08 기아자동차주식회사 assembly having a rotor in a vehicles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56110591A (en) * 1980-02-06 1981-09-01 Matsushita Electric Ind Co Ltd Rotary type fluid machine
JPH109153A (en) * 1996-04-22 1998-01-13 Hitachi Metals Ltd Vane and manufacture thereof
KR100471992B1 (en) * 2001-11-20 2005-03-08 기아자동차주식회사 assembly having a rotor in a vehicles
JP2003307185A (en) * 2002-04-12 2003-10-31 Mitsubishi Motors Corp Vane pump
JP2004052711A (en) * 2002-07-23 2004-02-19 Kayaba Ind Co Ltd Vane pump

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