KR20090111703A - A gear pump - Google Patents

A gear pump Download PDF

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Publication number
KR20090111703A
KR20090111703A KR1020080037435A KR20080037435A KR20090111703A KR 20090111703 A KR20090111703 A KR 20090111703A KR 1020080037435 A KR1020080037435 A KR 1020080037435A KR 20080037435 A KR20080037435 A KR 20080037435A KR 20090111703 A KR20090111703 A KR 20090111703A
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KR
South Korea
Prior art keywords
gear
casing
pump
driven gear
relief valve
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Application number
KR1020080037435A
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Korean (ko)
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KR101007937B1 (en
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김승수
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김승수
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Priority to KR1020080037435A priority Critical patent/KR101007937B1/en
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Publication of KR101007937B1 publication Critical patent/KR101007937B1/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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0049—Equalization of pressure pulses
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C15/064—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • 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
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

PURPOSE: A gear pump is provided to prevent a load exerted on the gear axis when the drive gear and the driven gear engage with each other. CONSTITUTION: A gear pump includes a casing, and a drive gear(122) and a driven gear(132) which are accommodated in the casing to engage with each other. The drive and driven gears have gear teeth(124,134). Clearance part(126,136) are formed on both side surfaces of the gear teeth being in contact with each other. The clearance part is composed of a straight section where the gear teeth of the drive gear and the driven gear contact with each other is formed by the straight line, and arc sections on both sides of the straight section.

Description

기어 펌프{A gear pump}Gear pump

본 발명은 기어 펌프에 관한 것으로, 보다 상세하게는 펌프의 작동 중에 펌프 내부에 밀폐된 공간의 부피가 변하는 폐입현상으로 인한 소음과 진동의 발생 및기어축의 파손을 방지할 수 있도록 하는 기어 펌프에 관한 것이다.The present invention relates to a gear pump, and more particularly, to a gear pump that can prevent the occurrence of noise and vibration and breakage of the gear shaft due to the closing of the volume of the closed space inside the pump during operation of the pump. will be.

일반적으로 기어 펌프란 케이싱의 내측에 서로 맞물려 있는 구동기어와 종동기어가 구비되고, 이 구동기어가 종동기어를 구동시켜 서로 맞물려 회전을 하면서 펌핑작용이 일어나게 된다,In general, the gear pump is provided with a driving gear and a driven gear that are engaged with each other inside the casing, the driving gear is driven by the driven gear to mesh with each other to rotate, the pumping action occurs.

이렇게 펌핑작용, 즉 기어의 기어이가 흡입구 측에서 서로 떨어질 때 기어의 기어이와 기어이의 사이에 흡입실이 형성되게 되고 이 흡입실의 용적이 한개의 이들이 점유한 용적만큼 증대되기 때문에 약간의 진공상태로 되어 기어홈과 케이싱 외주 사이에 끼어 송출구 방향으로 압송하게 된다. This pumping action, that is, when the gears of the gears fall from each other on the suction port side, a suction chamber is formed between the gears of the gears and the gear teeth, and the volume of the suction chamber is increased by the volume occupied by one of them. It is sandwiched between the gear groove and the casing outer circumference to feed the discharge port.

그러나 기어 펌프(21)는 기어의 물림이 1보다 크기 때문에 도 7에 도시된 바와 같이 기어이(26)(27)(28)(29)들이 항상 맞물려 양 기어이(26)(27)(28)(29)들의 사이에 갇힌 유체가 외부와 고립되어 나타나는 폐입현상이 존재하는 구간이 발생하게 되며, 이는 인벌류우트치형의 특성상 불가피한 현상이다.However, since the gear pump 21 has a greater bite than 1, the gears 26, 27, 28 and 29 are always meshed so that the gears 26, 27 and 28 are always engaged as shown in FIG. 29) A section in which a trapped phenomenon occurs in which the fluid trapped between the outside and the isolated phase occurs, is an inevitable phenomenon due to the characteristics of the involute type.

이와 같이 한쌍을 이루는 구동기어(22)와 종동기어(23)가 서로 맞물려 회전을 할 때 양 기어이(26)(27)(28)(29)들이 맞물려 형성되는 폐입공간(30)의 체적이 폐입 개시구간부터 폐입 종료구간까지 이동하는 동안에 변화를 초래하게 되는데, 폐입 개시구간에서의 폐입볼륨(V1)보다 중간에 이르렀을 때의 페입볼륨(V2)이 작으며, 또 폐입 종료 시점의 폐입볼륨(V3)은 중간의 폐입볼륨(V2)보다 크기 때문에 도 8에 도시된 바와 같이 페입구간(30)의 전반부에서 폐입공간(30)에 갇힌 유체의 압축현상이 일어나게 되고, 이 폐입구간(30)의 후반부에서는 팽창 현상이 일어나게 된다.Thus, when the pair of drive gear 22 and the driven gear 23 is rotated in engagement with each other, the volume of the closing space 30 is formed by the two gears 26, 27, 28, 29 are engaged. The change is caused during the movement from the start section to the closing end section, and the volume of the cut-out volume V2 is smaller than the closing volume V1 in the closing start section, and the closing volume at the closing end point ( Since V3) is larger than the intermediate closing volume V2, compression of the fluid trapped in the closing space 30 occurs in the first half of the feeding section 30, as shown in FIG. In the second half of), an expansion phenomenon occurs.

따라서, 유체의 압축과정에서 거의 비압축성의 유체가 체적 변화를 일으키게 되어 압축 과정 동안에는 기어축에 큰 하중이 작용하게 되어 구동력의 증대를 초래함으로써 동력 손실을 일으키고, 또한 압축 과정에서 작용하는 고압력에 의해 하우징과의 틈새로 유체가 유출되어 송출 유량의 저하를 가져와 체적 효율의 저하를 유발하는 문제점이 있으며, 다른 한편으로는 팽창 과정에서 유체 중에 혼입된 공기가 유리되어 에어레이션(araeation) 현상을 유발하게 되는 문제점이 있었다.Therefore, the almost incompressible fluid causes volume change during the compression of the fluid, and a large load is applied to the gear shaft during the compression process, resulting in an increase in driving force, causing power loss, and also due to the high pressure acting in the compression process. There is a problem in that the fluid flows out into the gap between the gas and the discharge flow rate, resulting in a decrease in volumetric efficiency, and on the other hand, air mixed in the fluid during the expansion process is released, causing aeration phenomenon. There was this.

이러한 종래의 문제점을 해결하기 위하여 대한민국 특허공개번호 제2002-19149호 " 기어식 오일펌프"가 개시된바 있다.In order to solve this conventional problem, Korean Patent Publication No. 2002-19149 "Gear type oil pump" has been disclosed.

이와 같이 종래의 발명은 종동기어의 잇빨의 사이 홀에 릴리프공간을 형성하고, 이 릴리프공간에 플런저를 구비하여 폐입공간에 폐입현상이 발생하게 되면 이 플런저가 후퇴하면서 유체가 릴리프공간을 통하여 펌프토출단으로 이동되도록 하여 폐입현상이 발생되는 것을 방지하고 있다.As described above, the related art forms a relief space in the hole between the teeth of the driven gear, and if the plunger is formed in the relief space and the closing phenomenon occurs in the closing space, the plunger retreats and the fluid is pumped out through the relief space. It is moved to the stage to prevent the occurrence of closing phenomenon.

이와 같은 종래의 발명은 종동기어에 릴리프공간을 형성하는데 많은 어려움이 발생하게 되고, 또한 릴리프공간을 형성한 후에 이 릴리프공간부에 스프링과 플런저를 설치하는 상당한 기술이 요하는 문제점이 있다.This conventional invention has a lot of difficulties in forming a relief space in the driven gear, and there is also a problem that requires a considerable technique for installing the spring and plunger in the relief space after forming the relief space.

그리고, 종동기어에 릴리프공간을 형성한 후에 이 릴리프공간을 통하여 유체가 펌프토출단으로 이동할 수 있도록 펌프카바에 유로를 형성하되, 이 유로가 릴리프공간과 서로 연계되도록 형성해야 함으로써, 작업공정이 복잡하고, 정밀성이 요하게 되어 릴리프공간과 유로가 서로 맞지 않게 되면 폐입현상을 방지하지 하기 위한 본래의 기능을 수행하지 못하게 되는 문제점이 발생하게 된다. After the relief space is formed in the driven gear, a flow path is formed in the pump cover so that the fluid can move to the pump discharge end through the relief space. If the relief space and the flow path do not match with each other, a problem arises that the original function cannot be performed to prevent the closing phenomenon.

본 발명 상기한 문제점을 해결하기 위하여 안출된 것으로, 구동기어와 종동기어가 서로 맞물리는 기어이의 접촉면적을 한정하고 기어이의 폭 양측면에 경사면을 형성하여 폐입공간에 있는 유체가 경사면을 통하여 유동 됨으로써, 구동기어와 종동기어가 서로 맞물려 회전시에 폐입현상의 발생을 방지하여 기어축으로 가해지는 하중의 발생을 방지하고, 소음 및 진동의 발생을 방지할 수 있도록 하는데 그 목적이 있다.The present invention has been made to solve the above problems, by limiting the contact area of the gear teeth meshed with the drive gear and the driven gear and by forming the inclined surface on both sides of the width of the gear teeth, the fluid in the enclosed space flows through the inclined surface, The purpose of the present invention is to prevent the occurrence of load applied to the gear shaft and to prevent the occurrence of noise and vibration by preventing the occurrence of closing phenomenon during rotation by engaging the drive gear and the driven gear.

또한, 기어 펌프의 케이싱 내측과 연통되는 유로를 형성하고, 이 유로에 릴리프밸브를 구비하여 유압을 적정한 상태로 조정하게 되어 기어 펌프의 구성요소를 보호하여 파손되는 것을 방지할 수 있도록 하는데 그 목적이 있다.In addition, a flow path is formed in communication with the casing of the gear pump, and the relief valve is provided in this flow path to adjust the hydraulic pressure in an appropriate state to protect the components of the gear pump to prevent damage. have.

상기한 목적을 달성하기 위한 본 발명은 케이싱이 구비되고, 이 케이싱의 내측에 수용된 구동기어와 종동기어가 서로 맞물려 회전하면서 유체를 펌핑하는 기어 펌프에 있어서, 상기 구동기어 및 종동기어의 기어이가 서로 맞닿는 면의 양측면부에 이격부가 형성된 것을 특징으로 한다.The present invention for achieving the above object is provided with a casing, a gear pump for pumping a fluid while the drive gear and the driven gear accommodated inside the casing rotates with each other, the gears of the drive gear and the driven gear are mutually Spacers are formed on both side surfaces of the contact surface.

여기서, 상기 이격부는 상기 구동기어 및 종동기어의 기어이가 맞닿는 면은 직선으로 형성되고, 이 직선의 양측 끝단은 원호로 형성된 것을 특징으로 한다.In this case, the spacer is in contact with the gears of the drive gear and the driven gear is formed in a straight line, both ends of the straight line is characterized in that formed by an arc.

나아가, 상기 구동기어 및 종동기어의 기어이에는 길이 방향의 양측면에 내 측을 향하도록 서로 대응되는 경사각이 형성된 것을 특징으로 한다.In addition, the gears of the drive gear and the driven gear is characterized in that the inclination angle corresponding to each other is formed on both sides in the longitudinal direction to face inward.

아울러, 상기 경사각은 0.002°인 것을 특징으로 한다.In addition, the inclination angle is characterized in that 0.002 °.

그리고, 상기 케이싱에는 구동기어와 종동기어의 회전력에 의한 쇼크발생을 방지하는 릴리프밸브가 더 구비된 것을 특징으로 한다.The casing may further include a relief valve for preventing shock caused by the rotational force of the drive gear and the driven gear.

여기서, 상기 릴리프밸브에는 압력에 의해 동작을 하는 작동부가 더 구비된 것을 특징으로 한다.Here, the relief valve is characterized in that it is further provided with an operating unit for operating by pressure.

나아가, 상기 케이싱의 양측을 커버하는 제1,2커버부재가 구비되고, 상기 양측 중 어느 일측의 커버부재에는 상기 케이싱의 내측부와 연계되어 타측부에 단턱지게 형성되어 릴리프밸브가 나사 결합되어 릴리프밸브의 작동부에 의해 개폐되는 유로가 형성되며, 상기 유로와 연계되어 릴리프밸브의 동작에 의해 개폐되는 배출공이 형성된 것을 특징으로 한다.Furthermore, first and second cover members are provided to cover both sides of the casing, and the cover member on either side of the casing is formed to be stepped on the other side in connection with the inner part of the casing, and the relief valve is screwed to the relief valve. A flow path that is opened and closed by an operation unit of the is formed, characterized in that the discharge hole is opened and closed by the operation of the relief valve in connection with the flow path.

아울러, 상기 제1,2커버부재에는 구동기어와 일체로 형성된 제1기어축과 종동기어와 일체로 형성된 제2기어축의 양측부가 각각에 장착되되, 상기 제1기어축의 일측부가 상기 제1커버부재의 외측으로 돌출되게 장착되고, 상기 제2커버부재에는 상기 유로와 배출공이 형성된 것을 특징으로 한다.In addition, both side portions of the first gear shaft integrally formed with the driving gear and the second gear shaft integrally formed with the driven gear are mounted on the first and second cover members, respectively, and one side of the first gear shaft has the first cover member. It is mounted to protrude outward of the, the second cover member is characterized in that the flow path and the discharge hole is formed.

이와 같이 구성된 본 발명은 상기한 문제점을 해결하기 위하여 안출된 것으로, 구동기어와 종동기어가 서로 맞물리는 기어이의 접촉면적을 한정하고 기어이의 폭 양측면에 경사면을 형성하여 폐입공간에 있는 유체가 경사면을 통하여 유동 됨 으로써, 구동기어와 종동기어가 서로 맞물려 회전시에 폐입현상의 발생을 방지하여 기어축으로 가해지는 하중의 발생을 방지하고, 소음 및 진동의 발생을 방지할 수 있는 효과가 있다.The present invention constructed as described above has been devised to solve the above problems, and defines the contact area of the gear teeth in which the drive gear and the driven gear mesh with each other and forms an inclined surface on both sides of the width of the gear teeth to form an inclined surface of the fluid in the enclosed space. By being flowed through, the driving gear and the driven gear are meshed with each other to prevent the occurrence of closing phenomenon during rotation, thereby preventing the occurrence of load applied to the gear shaft and preventing the occurrence of noise and vibration.

또한, 기어 펌프의 케이싱 내측과 연통되는 유로를 형성하고, 이 유로에 릴리프밸브를 구비하여 유압을 적정한 상태로 조정하게 되어 기어 펌프의 구성요소를 보호하여 파손되는 것을 방지할 수 있는 효과가 있다.In addition, a flow path communicating with an inner casing of the gear pump is formed, and a relief valve is provided in the flow path to adjust the hydraulic pressure in an appropriate state, thereby protecting the components of the gear pump and preventing damage.

이하, 본 발명에 따른 기어 펌프에 대하여 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, the gear pump according to the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 기어 펌프를 보인 단면도이고, 도 2는 본 발명의 기어를 보인 요부 확대 사시도이고, 도 3은 본 발명의 기어를 보인 확대 단면도이고, 도 4는 본 발명의 구동기어와 종동기어가 서로 맞물린 상태의 기어이를 보인 단면도이다.1 is a cross-sectional view showing a gear pump according to the present invention, Figure 2 is an enlarged perspective view showing the main portion of the gear of the present invention, Figure 3 is an enlarged cross-sectional view showing the gear of the present invention, Figure 4 is a drive gear of the present invention Sectional view showing gear teeth with driven gears engaged.

도 1 내지 도 4에 도시된 바와 같이 본 발명의 기어 펌프(100)는 내측에 공간부(111)가 형성되고, 전,후부에 이 공간부(111)와 연통되는 흡입구와 송출구로 이루어진 케이싱(110)이 구비되고, 이 케이싱(110)의 양측부를 커버하는 제1,2커버부재(112)(114)로 이루어진다.1 to 4, the gear pump 100 of the present invention has a space 111 is formed inside, the casing consisting of the suction port and the discharge port communicated with the space 111 in the front and rear ( 110 is provided, and consists of first and second cover members 112 and 114 covering both sides of the casing 110.

그리고, 상기 케이싱(110)의 공간부(111)에 서로 맞물려 회전하면서 흡입구를 통하여 유체를 흡입하여 송출구를 통해 외부로 배출시키는 구동기어(122)와 종 동기어(132)가 구비되고, 이 구동기어(122)와 종동기어(132)가 각각에 일체로 형성되어 제1,2커버부재(112)(114)에 체결고정되는 제1,2기어축(120)(130)이 구비된다.In addition, a driving gear 122 and a longitudinal synchronizing gear 132 are provided, which engage with each other in the space 111 of the casing 110 and rotate to suck the fluid through the suction port and discharge the fluid to the outside through the discharge port. The drive gear 122 and the driven gear 132 are formed integrally with each of the first and second gear shafts 120 and 130 are fastened and fastened to the first and second cover members 112 and 114.

즉, 상기 제1기어축(120)에는 구동기어(122)가 일체로 또는 체결 고정되고, 제2기어축(130)에는 종동기어(132)가 일체 또는 체결 고정된다.That is, the driving gear 122 is integrally or fastened to the first gear shaft 120, and the driven gear 132 is integrally or fastened to the second gear shaft 130.

이때, 상기 구동기어(122)가 일체로 형성된 제1기어축(120)의 일측부는 외부의 동력을 전달받아 동작하도록 상기 제1커버부재(112)의 외측으로 돌출되게 설치된다.At this time, one side of the first gear shaft 120 is formed integrally with the drive gear 122 is installed to protrude to the outside of the first cover member 112 to operate by receiving external power.

여기서, 상기 구동기어(122)와 종동기어(132)가 서로 맞물러 회전할 때 기어이(124)(134)가 접촉되는 접촉면(a) 양측에 이격부(126)(136)가 형성된다 Here, the spaced parts 126 and 136 are formed at both sides of the contact surface (a) where the gears 124 and 134 contact when the driving gear 122 and the driven gear 132 rotate in engagement with each other.

나아가, 상기 이격부(126)(136)는 상기 구동기어(122)와 종동기어(132)의 각각 기어이(124)(134)가 서로 맞물려 접촉되는 표면, 즉 서로 기어이(124)(134)가 맞물리는 기어이 나비(d)의 중앙부를 평면이 되도록 접촉면(a)을 형성하고, 이 접촉면(a)의 양측은 원호 형상으로 형성된 이격부(126)(136)가 형성되어 상기 구동기어(122)와 종동기어(132)의 기어이(124)(134)가 서로 맞물릴 때 접촉면(a)이 접촉되는 양측부에 미세한 공간이 형성되게 된다.Further, the spacers 126 and 136 have a surface where the gears 124 and 134 of the drive gear 122 and the driven gear 132 are in contact with each other, that is, the gears 124 and 134 are in contact with each other. The engaging gear forms a contact surface (a) such that the center portion of the butterfly (d) is planar, and both sides of the contact surface (a) are formed with spaced apart portions (126, 136) formed in an arc shape to form the driving gear (122). When the gears 124 and 134 of the and the driven gear 132 are engaged with each other, fine spaces are formed at both sides of the contact surface a.

또한, 상기 구동기어(122)와 종동기어(132)의 양측면에는 기어이(124)(134)에 경사각(θ)이 형성된다.In addition, inclination angles θ are formed on the gears 124 and 134 on both side surfaces of the driving gear 122 and the driven gear 132.

여기서, 상기 경사각(θ)은 기어이(124)(134)의 외측 기어이나비(d)가 좁아지도록 기어이(124)(134)에 경사각(θ)이 형성되고, 이 경사각(θ)의 각도는 0.002°의 경사면을 가지는 것이 바람직하다.  Here, the inclination angle θ is formed in the gears 124 and 134 so that the outer gear ratio d of the gears 124 and 134 is narrow, the angle of the inclination angle (θ) is 0.002 It is preferable to have an inclined surface of °.

이는 상기 구동기어(122)와 종동기어(132)의 기어이(124)(134)가 0.002°의 이하로 경사각(θ)이 형성되게 되면 구동기어(122)와 종동기어(132)가 서로 맞물려 회전하면서 펌핑 작업을 수행할 때 폐입현상이 발생하게 되더라도 유체가 원활하게 유동하지 못하게 되어 제1,2기어축(120)(130)에 압력이 가해지게 되어 파손되는 문제가 발생하게 되고, 또한 경사각(θ)을 0.002°이상으로 형성되게 되면 많은 양의 유체가 경사각을 통하여 유동하게 되어 펌핑력이 소실됨으로 펌프의 기능이 저하되게 된다.This is because when the gears 124 and 134 of the drive gear 122 and the driven gear 132 are formed with an inclination angle θ of less than 0.002 °, the drive gear 122 and the driven gear 132 mesh with each other to rotate. When the pumping operation is performed while the closing phenomenon occurs, the fluid does not flow smoothly, and the pressure is applied to the first and second gear shafts 120 and 130, resulting in a problem of breakage, and an inclination angle ( When θ) is formed at 0.002 ° or more, a large amount of fluid flows through the inclination angle, and the pumping force is lost, thereby degrading the function of the pump.

이와 같이 구성된 기어 펌프에 대한 작용관계를 설명하면 다음과 같다.Referring to the operation relationship for the gear pump configured as described above is as follows.

먼저, 외부의 동력을 이용하여 상기 제1기어축(120)을 회전시키게 되면 상기 제1기어축(120)에 일체로 형성된 구동기어(122)와 상기 종동기어(132)의 기어이(124)(134)와 서로 맞물려 회전하는 사이에 위치하는 유체를 송출구 방향으로 이동시켜 배출시키게 된다.First, when the first gear shaft 120 is rotated by using external power, the gear 124 of the driving gear 122 and the driven gear 132 integrally formed on the first gear shaft 120 are rotated. 134) and the fluid located between the rotation and the discharge to the discharge port direction.

이렇게, 상기 기어이(124)(134)가 서로 맞물리면서 유체를 가두어 이송하는 폐입 초기 단계로부터 중간단계로 진행되면 종래기술에서 설명한 것과 같이 폐입공간의 볼륨이 감소하므로 유체의 압축현상이 일어나게 된다.As such, when the gears 124 and 134 are engaged with each other and proceed from the initial closing step of confining and transporting the fluid to the intermediate step, the volume of the closing space decreases as described in the related art, and thus compression of the fluid occurs.

이때, 폐입공간에 작용하는 압축력에 의해 유체는 구동기어(122) 및 종동기어(132)의 이격부(126)(136)와 양측부에 형성된 경사각(θ)을 통하여 흡입구 또는 송출구로 이동하게 되어 폐입공간에 줄어든 볼륨을 확장시키게 된다.At this time, the fluid is moved to the inlet or outlet through the inclination angle (θ) formed on both sides of the drive gear 122 and the driven gear 132 and the spaced portion 126, 136 of the driven gear 132 by the compression force acting on the closing space. It will expand the reduced volume in the enclosed space.

이와 같은 반복적인 동작에 의해 유체를 흡입구를 통하여 송출구로 배출시키 게 되고, 이때 폐입공간에 압축력이 발생되어 제1,2기어축(120)(130)이 파손되는 것을 방지할 수 있게 된다.The fluid is discharged to the outlet through the inlet through such a repetitive operation. At this time, a compressive force is generated in the closing space to prevent the first and second gear shafts 120 and 130 from being damaged.

도 5는 본 발명에 따른 기어 펌프의 다른 실시예를 보인 단면도이다.5 is a cross-sectional view showing another embodiment of a gear pump according to the present invention.

이에 도시된 바와 같이 본 발명은 상기 케이싱(110)의 양측부에 구비된 제1,2커버부재(112)(114) 중 어느 일측부에는 구동기어(122)와 종동기어(132)가 서로 맞물려 회전하면서 유체를 흡입구를 통하여 흡입하여 송출구로 배출시킬 때 구동기어(122)와 종동기어(132)의 회전력에 의한 쇼크 발생을 방지하는 릴리프밸브(140)가 더 구비된다.As shown in the present invention, the driving gear 122 and the driven gear 132 are engaged with one side of the first and second cover members 112 and 114 provided at both sides of the casing 110. Relief valve 140 is further provided to prevent a shock caused by the rotational force of the drive gear 122 and the driven gear 132 when the fluid is sucked through the suction port and discharged to the discharge port while rotating.

여기서, 상기 릴리프밸브(140)는 상기 제1,2커버부재(112)(114) 중 상기 구동기어(122)가 일체로 형성된 제1기어축(120)이 관통하여 외측으로 돌출된 반대 방향에 위치한 제2커버부재(114)에 형성되는 것이 바람직하다.Here, the relief valve 140 is in the opposite direction in which the first gear shaft 120, in which the driving gear 122 is integrally formed, of the first and second cover members 112 and 114 penetrates and protrudes outward. It is preferably formed in the second cover member 114 located.

나아가, 상기 제2커버부재(114)에는 상기 케이싱(110)의 내측과 연계되는 유로(116)가 형성되고, 상기 케이싱(110)의 내측과 연계되는 타측부의 유로(116) 내측부에 단턱(116a)이 형성되어 나사산(116b)이 형성되며, 이 나사산(116b)에 릴리프밸브(140)가 나사 결합되되, 유로(116)의 단턱(116a)에 밀착되어 압력에 의해 동작하는 작동부(142)가 더 구비되게 된다.Further, the second cover member 114 is formed with a flow path 116 associated with the inner side of the casing 110, and the stepped portion inside the flow path 116 of the other side associated with the inner side of the casing 110. 116a is formed to form a thread 116b, and a relief valve 140 is screwed to the thread 116b, but is in close contact with the step 116a of the flow path 116 to operate by pressure. ) Is further provided.

아울러, 상기 제2커버부재(114)에는 상기 유로(116)와 연계되는 배출공(118)이 형성되되, 상기 배출공(118)은 상기 릴리프밸브(140)의 동작에 의해 개폐되는 유로(116)를 통하여 이동하는 유체를 외부로 배출하게 된다. In addition, the second cover member 114 is formed with a discharge hole 118 associated with the flow path 116, the discharge hole 118 is a flow path 116 that is opened and closed by the operation of the relief valve 140. The fluid moving through) is discharged to the outside.

이와 같이 구성된 본 발명에 따른 기어 펌프의 작용관계는 전자에서 설명한 동일한 방법에 의해 동작하는 것으로 여기에서는 작용관계에 대한 설명은 생략하기로 한다.The working relationship of the gear pump according to the present invention configured as described above is operated by the same method as described above, and the description of the working relationship will be omitted here.

다만, 상기 구동기어(122)와 종동기어(142)가 서로 맞물려 회전하면서 흡입구로 유체를 흡입한 후 송출구를 통하여 유체를 배출시키는 것으로, 구동기어(122)와 종동기어(132)가 서로 맞물려 회전할 때 케이싱(110)의 공간부(111)에 압력 등 쇼크가 발생하게 되면 케이싱(110)의 공간부(111)에 있는 유체는 유로(116)를 통하여 이동하게 되고, 이때 케이싱(110)의 내측 압력에 의해 상기 릴리프밸브(140)의 작동부(142)가 밀리면서 유로(116)의 단턱(116a)으로부터 떨어지게 되어 상기 유로(116)가 개방되게 된다.However, the driving gear 122 and the driven gear 142 are engaged with each other to rotate and suck the fluid through the suction port, and then discharge the fluid through the discharge port, the drive gear 122 and the driven gear 132 is engaged with each other When a shock or the like occurs in the space 111 of the casing 110 when rotating, the fluid in the space 111 of the casing 110 moves through the flow path 116, and at this time, the casing 110 Due to the internal pressure of the operation part 142 of the relief valve 140 is pushed away from the step 116a of the flow path 116, the flow path 116 is opened.

이렇게 유로(116)가 개방되게 되면 유체는 상기 배출공(118)을 통하여 외부로 배출되게 되어 케이싱(110)의 내측에 쇼크가 발생되는 것을 방지할 수 있게 있게 된다.When the flow path 116 is opened in this way, the fluid is discharged to the outside through the discharge hole 118 to prevent the shock from occurring inside the casing 110.

그리고, 상기 유로(116)에는 항상 유체가 충만되어 있으나 상기 릴리프밸브(140)는 기어 펌프(100)의 설정 압력 이하에서는 동작하지 않기 때문에 유로(116)를 밀폐한 상태를 유지하게 된다.In addition, although the fluid is always filled in the flow path 116, the relief valve 140 does not operate below the set pressure of the gear pump 100, so that the flow path 116 is kept closed.

또한, 상기 케이싱(110) 내부 압력으로 인하여 후퇴된 릴리프밸브(140)의 작동부(142)는 케이싱(110) 내부의 압력이 정상화되면 자동으로 전진하게 되어 상기 유로(116)의 단턱(116a)에 밀착되어 유로(116)를 폐쇄하게 된다.In addition, the operation part 142 of the relief valve 140 retracted due to the internal pressure of the casing 110 is automatically advanced when the pressure inside the casing 110 is normalized, so that the step 116a of the flow path 116 is provided. In close contact with each other, the flow path 116 is closed.

즉, 상기 릴리프밸브(140)의 작동에 의해 유체가 배출공(118)을 통하여 배출 된 후에 기어 펌프(100)의 설정 압력 이하가 되면 상기 작동부(142)를 밀어내는 압력이 떨어지게 되어 자연적으로 유로(116)를 작동부(142)가 차단하게 된다.That is, after the fluid is discharged through the discharge hole 118 by the operation of the relief valve 140, if the pressure is less than the set pressure of the gear pump 100, the pressure for pushing the operating portion 142 falls naturally The operation part 142 blocks the flow path 116.

따라서, 상기 기어펌프(100)의 제2커버부재(114)에 릴리프밸브(140)를 설치함으로써, 기어펌프(100)의 자체적으로 압력세팅이 가능하여 적용성과 효율성이 좋으며 , 항상 일정한 압력을 유지할 수 있고, 소음을 저감시킬 수 있게 된다.Therefore, by installing the relief valve 140 on the second cover member 114 of the gear pump 100, the gear pump 100 can be pressure setting itself, the applicability and efficiency is good, and always maintain a constant pressure And noise can be reduced.

상기에서는 본 발명에 따른 기어 펌프에 대한 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고, 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고, 이 또한 본 발명에 속한다.In the above, a preferred embodiment of the gear pump according to the present invention has been described, but the present invention is not limited thereto, and the present invention is not limited thereto. It is possible and this also belongs to the present invention.

본 발명은 기어 펌프에 관한 것으로, 보다 상세하게는 펌프의 작동 중에 펌프 내부에 밀폐된 공간의 부피가 변하는 폐입현상으로 인한 소음과 진동의 발생 및기어축의 파손을 방지할 수 있도록 하는 기어 펌프에 관한 것이다.The present invention relates to a gear pump, and more particularly, to a gear pump that can prevent the occurrence of noise and vibration and breakage of the gear shaft due to the closing of the volume of the closed space inside the pump during operation of the pump. will be.

도 1은 본 발명에 따른 기어 펌프를 보인 단면도.1 is a cross-sectional view showing a gear pump according to the present invention.

도 2는 본 발명의 기어를 보인 요부 확대 사시도.Figure 2 is an enlarged perspective view of the main portion showing the gear of the present invention.

도 3은 본 발명의 기어를 보인 확대 단면도.Figure 3 is an enlarged cross-sectional view showing a gear of the present invention.

도 4는 본 발명의 구동기어와 종동기어가 서로 맞물린 상태의 기어이를 보인 단면도.Figure 4 is a cross-sectional view showing a gear teeth in a state in which the drive gear and the driven gear of the present invention is engaged with each other.

도 5는 본 발명에 따른 기어 펌프의 다른 실시예를 보인 단면도.5 is a cross-sectional view showing another embodiment of a gear pump according to the present invention.

도 6은 본 발명에 따른 실시예의 작용관계를 보인 단면도.Figure 6 is a cross-sectional view showing the working relationship of the embodiment according to the present invention.

도 7은 종래의 기어펌프를 보인 도면.7 is a view showing a conventional gear pump.

도 8은 종래의 폐입용적의 변화를 보인 도면.8 is a view showing a change in the conventional closing volume.

[도면의 주요 부분에 대한 부호의 설명][Description of Symbols for Main Parts of Drawing]

100 : 기어 펌프 110 : 케이싱100 gear pump 110 casing

112, 114 : 제1,2커버부재 116 : 유로112 and 114: first and second cover members 116: flow path

118 : 배출구 120, 130 : 제1,2기어축118: outlet 120, 130: first and second gear shaft

122 : 구동기어 132 : 종동기어122: drive gear 132: driven gear

140 : 릴리프밸브 142 : 작동부 140: relief valve 142: operating part

Claims (8)

케이싱이 구비되고, 이 케이싱의 내측에 수용된 구동기어와 종동기어가 서로 맞물려 회전하면서 유체를 펌핑하는 기어 펌프에 있어서,In a gear pump provided with a casing, the drive gear and the driven gear accommodated inside the casing mesh with each other and rotate to pump a fluid. 상기 구동기어 및 종동기어의 기어이가 서로 맞닿는 면의 양측면부에 이격부가 형성된 것을 특징으로 하는 기어 펌프.The gear pump of the drive gear and the driven gear, characterized in that the separation portion is formed on both side surfaces of the surface in contact with each other. 제 1 항에 있어서,The method of claim 1, 상기 이격부는 상기 구동기어 및 종동기어의 기어이가 맞닿는 면은 직선으로 형성되고, 이 직선의 양측 끝단은 원호로 형성된 것을 특징으로 하는 기어 펌프.The separation unit is a gear pump, characterized in that the contact surface of the gear gears of the drive gear and the driven gear is formed in a straight line, both ends of the straight line is formed in an arc. 제 1 항에 있어서,The method of claim 1, 상기 구동기어 및 종동기어의 기어이에는 길이 방향의 양측면에 내측을 향하도록 서로 대응되는 경사각이 형성된 것을 특징으로 하는 기어 펌프.The gear pump of the drive gear and the driven gear is characterized in that the inclination angle corresponding to each other is formed on both sides of the longitudinal direction inward. 제 3 항에 있어서,The method of claim 3, wherein 상기 경사각은 0.002°인 것을 특징으로 하는 기어 펌프.The inclination angle of the gear pump, characterized in that 0.002 °. 제 1 항에 있어서,The method of claim 1, 상기 케이싱에는 구동기어와 종동기어의 회전력에 의한 쇼크발생을 방지하는 릴리프밸브가 더 구비된 것을 특징으로 하는 기어 펌프.The casing further includes a relief valve for preventing shock caused by the rotational force of the drive gear and the driven gear. 제 5 항에 있어서,The method of claim 5, wherein 상기 릴리프밸브에는 압력에 의해 동작을 하는 작동부가 더 구비된 것을 특징으로 하는 기어 펌프.The relief valve is a gear pump, characterized in that further provided with an operating part for operating by pressure. 제 6 항에 있어서,The method of claim 6, 상기 케이싱의 양측을 커버하는 제1,2커버부재가 구비되고,First and second cover members are provided to cover both sides of the casing, 상기 양측 중 어느 일측의 커버부재에는 상기 케이싱의 내측부와 연계되어 타측부에 단턱지게 형성되어 릴리프밸브가 나사 결합되어 릴리프밸브의 작동부에 의해 개폐되는 유로가 형성되며,The cover member of either side of the both sides is formed in step with the inner side of the casing is stepped on the other side is formed with a relief valve is screwed coupled to the opening and closing by the operating portion of the relief valve, 상기 유로와 연계되어 릴리프밸브의 동작에 의해 개폐되는 배출공이 형성된 것을 특징으로 하는 기어 펌프.Gear pump characterized in that the discharge hole is opened and closed by the operation of the relief valve in conjunction with the flow path. 제 7 항에 있어서,The method of claim 7, wherein 상기 제1,2커버부재에는 구동기어와 일체로 형성된 제1기어축과 종동기어와 일체로 형성된 제2기어축의 양측부가 각각에 장착되되, 상기 제1기어축의 일측부가 상기 제1커버부재의 외측으로 돌출되게 장착되고,Both side portions of the first gear shaft integrally formed with the driving gear and the second gear shaft integrally formed with the driven gear are mounted on the first and second cover members, respectively, and one side portion of the first gear shaft is disposed outside the first cover member. Mounted protrudingly, 상기 제2커버부재에는 상기 유로와 배출공이 형성된 것을 특징으로 하는 기어 펌프. The second cover member is a gear pump, characterized in that the flow path and the discharge hole is formed.
KR1020080037435A 2008-04-22 2008-04-22 A gear pump KR101007937B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108087266A (en) * 2018-01-09 2018-05-29 大晃机械（青岛）有限公司 A kind of gear pump
CN109209861A (en) * 2018-10-09 2019-01-15 宿迁学院 A kind of composite structure for gear pump high speed pocketed oil off-load
CN109356846A (en) * 2018-10-09 2019-02-19 宿迁学院 A kind of combination unloading-structure for pocketed oil
CN111173736A (en) * 2019-08-30 2020-05-19 重庆红宇精密工业有限责任公司 Gear pump with axial clearance compensation device
KR20200140538A (en) * 2019-06-07 2020-12-16 신영석 valve on-off device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130006A (en) * 1976-04-23 1977-11-01 Hitachi Ltd Gear pump
JPH04187883A (en) * 1990-11-21 1992-07-06 Nippondenso Co Ltd Trochoid gear pump
JP2004176633A (en) * 2002-11-27 2004-06-24 Toyoda Mach Works Ltd Gear pump
JP2006097589A (en) * 2004-09-29 2006-04-13 Favess Co Ltd Gear pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108087266A (en) * 2018-01-09 2018-05-29 大晃机械（青岛）有限公司 A kind of gear pump
CN109209861A (en) * 2018-10-09 2019-01-15 宿迁学院 A kind of composite structure for gear pump high speed pocketed oil off-load
CN109356846A (en) * 2018-10-09 2019-02-19 宿迁学院 A kind of combination unloading-structure for pocketed oil
CN109356846B (en) * 2018-10-09 2023-08-29 宿迁学院 Combined unloading structure for trapped oil
KR20200140538A (en) * 2019-06-07 2020-12-16 신영석 valve on-off device
CN111173736A (en) * 2019-08-30 2020-05-19 重庆红宇精密工业有限责任公司 Gear pump with axial clearance compensation device

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