KR20000039081A - Industrial hydraulic pump - Google Patents

Industrial hydraulic pump Download PDF

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Publication number
KR20000039081A
KR20000039081A KR1019980054297A KR19980054297A KR20000039081A KR 20000039081 A KR20000039081 A KR 20000039081A KR 1019980054297 A KR1019980054297 A KR 1019980054297A KR 19980054297 A KR19980054297 A KR 19980054297A KR 20000039081 A KR20000039081 A KR 20000039081A
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South Korea
Prior art keywords
compression chambers
chamber
compression
check valves
chambers
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KR1019980054297A
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Korean (ko)
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KR100284509B1 (en
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주재석
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주재석
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Publication of KR100284509B1 publication Critical patent/KR100284509B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/141—Intermediate liquid piston between the driving piston and the pumped liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/11—Kind or type liquid, i.e. incompressible
    • 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

Abstract

PURPOSE: An industrial hydraulic pump is provided to maximize the operation efficiency of a high pressure pump by discharging a small amount of oil without counterflow of oil. CONSTITUTION: An industrial hydraulic pump includes a pair of first compression chambers(10,12) to be inputted and outputted by plungers(6,8) and a pair of second compression chambers(18,20) to be inputted and outputted by plungers(14,16), wherein the first and second compression chambers are provided at both sides of a central operation chamber(4) of a main body(2) and respectively communicating with the operation chamber and discharge holes(28,30) via different passages mounted with check valves, and the pistons are elastically mounted between the first and second chambers for inputting and outputting into the second compression chambers with bodies(76,78) having a smaller diameter, wherein check valves(40,42) of passages(32,34) connecting the first chambers with the operation chamber are supported by push rods(68,70) inserted in guide holes(64,66) of the discharge holes so that the push rods forcibly block the check valves when high load is applied.

Description

산업용 유압펌프Industrial hydraulic pump

본 발명은 전동기에 의해 작동하는 산업용 유압펌프에 관한 것으로서, 상세하게는 고부하시에도 작동효율을 극대화할 수 있도록 한 것이다.The present invention relates to an industrial hydraulic pump operated by an electric motor, and in particular, to maximize the operating efficiency even at high loads.

산업용 유압펌프는 크게 저압펌프와 고압펌프로 구분되며, 저압펌프는 큰 힘을 필요로 하지 않게 되므로 유압유의 토출량을 증가시켜 고속작동토록 구성되고, 고압펌프는 유압유의 토출량을 감소시켜 저속작동으로 큰 힘을 발휘할 수 있도록 구성된다.Industrial hydraulic pumps are largely divided into low pressure pumps and high pressure pumps. Since low pressure pumps do not require large force, they are configured to increase the discharge amount of hydraulic oil so that they can operate at high speed. It is configured to exert power.

그러나 저압펌프와 고압펌프는 분리 제작하여 사용할 경우 경비가 많이 소요되고 또 운반 및 사용상 많은 번거로움이 따르게 되므로 종래에도 부하에 따라 저압 또는 고압으로 자동전환 되고 또 플랜저의 왕복작동에 의해 펌핑이 이루어질 수 있도록 한 산업용 유압펌프가 널리 이용되고 있었다.However, since the low pressure pump and the high pressure pump are separately manufactured and used, it requires a lot of expense and a lot of trouble in carrying and using them. Therefore, the pump can be pumped by the reciprocating operation of the flanger and also automatically converted to low or high pressure according to the load. An industrial hydraulic pump was widely used.

즉 종래에 산업용 유압펌프는 도4에서와 같이 전동기의 회전축을 사이에 두고 좌우 각각 큰 직경의 플랜저와 작은 직경의 플랜저를 직렬로 연결하고 그 압축실은 각기 별도로 구성하여 부하에 관계없이 큰 직경의 플랜저와 작은 직경의 플랜저가 동시에 작동되게 하되 저부하시에는 큰 직경의 플랜저와 작은 직경의 플랜저에 의해 많은 량의 유압유를 토출시켜 저압펌프로서의 기능을 발휘하도록 하고, 고부하시에는 큰 직경의 플랜저로부터 토출되는 유압유는 릴리프밸브에 의하여 탱크로 역류되게 하여 유압유의 토출량 감소로 고압펌프로서의 기능을 발휘하도록 한 것이다.That is, in the related art, the industrial hydraulic pump connects the large diameter flanger and the small diameter flanger in series with the rotary shaft of the motor in between as shown in FIG. And small diameter flanger are operated at the same time, but at the time of low load, a large amount of hydraulic oil is discharged by a large diameter flanger and a small diameter flanger to function as a low pressure pump. Hydraulic oil is to flow back to the tank by the relief valve to reduce the discharge amount of the hydraulic oil to function as a high pressure pump.

따라서 이러한 구성의 산업용 유압펌프는 저부하시에는 작동효율을 높여줄 수 있으나 고부하시에는 큰 직경의 플랜저로부터 토출되는 유량이 모두 역류함에 따라 작동효율이 떨어지는 치명적인 결점이 있는 것이었다.Therefore, the industrial hydraulic pump of such a configuration can increase the operating efficiency at low loads, but at high loads, the flow rate discharged from the large diameter flanger has a fatal flaw, in which the operating efficiency falls.

이에 본 발명은 상술한 종래에 결점들을 시정하기 위하여 고부하시에도 유압유를 역류시킴 없이 필요로 하는 적은 유량만 토출될 수 있도록 하여 작동효율을 극대화시켜 줄수 있는 산업용 유압펌프를 제공함에 그 목적이 있다.Accordingly, an object of the present invention is to provide an industrial hydraulic pump capable of maximizing operating efficiency by allowing only a small flow rate to be discharged without reflowing hydraulic oil even at high loads in order to correct the above-described drawbacks.

상기한 목적달성을 위하여 본 발명은 작동실 양측에 플랜저가 왕복 작동하는 제1압축실과 제2압축실을 차례로 설치하여 그 사이에 제2압축실 내부를 출몰하는 몸체에 비해 제1압축실쪽의 압축링 직경이 큰 피스톤을 설치하고, 상기 제1, 2 압축실은 각각 체크밸브가 설치된 연통로를 통하여 작동실 및 토출구와 연결하고, 고부하시에는 제1압축실과 작동실을 연결하는 연통로의 체크밸브를 푸시로드가 차단토록 한 것이다.In order to achieve the above object, the present invention sequentially installs the first compression chamber and the second compression chamber in which the flanger reciprocates on both sides of the operation chamber, and the compression ring on the first compression chamber side as compared to the body to shed the inside of the second compression chamber therebetween. A piston having a large diameter is installed, and the first and second compression chambers are connected to the operation chamber and the discharge port through communication paths provided with check valves, respectively, and at high load, a check valve of the communication path connecting the first compression chamber and the operation chamber is installed. Push rods are blocked.

즉 본 발명은 저부하시에는 플랜저의 작동으로 제1압축실의 내부압력 변화로 제1압축실을 통하여 많은 량의 유압유 토출로 저압펌프로서의 기능을 갖도록 하고 고부하시에는 푸시로드가 제1압축실을 밀폐시켜 내부압이 증가하게 되면 몸체 직경이 작은 피스톤의 작동에 의한 제2압축실의 내부압력 변화로 소량의 유압유가 토출되게 하여 고압펌프로서의 기능을 갖도록 한 것이다.That is, the present invention has a function as a low pressure pump with a large amount of hydraulic oil discharge through the first compression chamber by the change of the internal pressure of the first compression chamber by the operation of the flanger at low load, the push rod is the first compression chamber at high load When the internal pressure is increased by sealing, a small amount of hydraulic oil is discharged due to the change in the internal pressure of the second compression chamber by the operation of the piston having a small body diameter, so as to function as a high pressure pump.

도 1 : 본 발명의 단면구성도1 is a cross-sectional view of the present invention

도 2 : 본 발명의 저부하시 동작을 나타낸 단면구성도2 is a cross-sectional view showing the operation at low load of the present invention

도 3 : 본 발명의 고부하시 동작을 나타낸 단면구성도3 is a cross-sectional view showing the operation at high load of the present invention

도 4 : 종래 발명의 회로 구성도4 is a circuit diagram of a conventional invention

＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

(2)--본체 (4)--작동실(2)-body (4)-operating room

(6)(8)--플랜저 (10)(12)-제1압축실(6) (8)-flange (10) (12) -first compression chamber

(14)(16)--피스톤 (18)(20)--제2압축실(14) (16)-piston (18) (20)-second compression chamber

(22)--흡입구 (24)--회전축(22)-Intake (24)-Rotating Shaft

(26)--캠 (28)(30)--토출구(26)-Cam (28) (30)-Outlet

(32)(34)(36)(38)--연통로 (40)(42)(44)(46)--체크밸브(32) (34) (36) (38)-Communication path (40) (42) (44) (46)-Check valve

(48)(50)(52)(54)--연통로 (56)(58)(60)(62)--체크밸브(48) (50) (52) (54)-Communication path (56) (58) (60) (62)-Check valve

(64)(66)--안내공 (68)(70)--푸시로드(64) (66)-Operator (68) (70)-Push Rod

(72)(74)--통로 (76)(78)--몸체(72) (74)-Path (76) (78)-Body

(80)(82)--피스톤링 (84)(86)--유입로(80) (82)-Piston Ring (84) (86)-Inflow

(88)(90)--체크밸브 (92)(94)--스프링(88) (90)-Check Valve (92) (94)-Spring

이하 첨부된 도면에 의거 본 발명의 구체적인 기술구성 및 작용을 설명하기로 한다.Hereinafter, specific technical configurations and operations of the present invention will be described with reference to the accompanying drawings.

도1은 본 발명의 단면구성도로서, 본 발명은 본체(2)중앙의 작동실(4)을 사이에 두고 좌우 각각 플랜저(6)(8)가 출몰작동하는 제1압축실(10)(12)과 피스톤(14)(16)이 출몰작동하는 제2압축실(18)(20)이 차례로 형성된다.1 is a cross-sectional configuration of the present invention, the present invention is the first compression chamber (10) in which the flanger (6) (8) on the left and right sides with the operating chamber (4) in the center of the main body (2) interposed 12 and the second compression chamber 18, 20, in which the pistons 14, 16 are projected, are formed in this order.

상기 작동실(4)에는 흡입구(22)를 통하여 유압유가 흡입되게 하고 그 중앙에는 전동기(도시안됨)에 의해 회전하는 회전축(24)을 굴대 설치하여 상기 회전축(24)의 캠(26)을 통하여 플랜저(6)(8)와 연결하며 상기 회전축(24)의 회전에 의한 플랜저(6)(8)의 왕복 작동으로 펌핑이 이루어지게 한다.The hydraulic chamber is sucked into the operating chamber 4 through the suction port 22 and a mandrel of a rotating shaft 24 rotated by an electric motor (not shown) is provided in the center of the operating chamber 4 through the cam 26 of the rotating shaft 24. It is connected to the flanger (6) (8) and the pumping is made by the reciprocating operation of the flanger (6) (8) by the rotation of the rotary shaft (24).

제1압축실(10)(12)은 작동실(4)및 본체(2)상부의 토출구(28)(30)를 연결하는 연통로(32)(34)(36)(38)를 형성하여 각기 체크밸브(40)(42)(44)(46)에 의해 개폐되게 하고, 제2압축실(18)(20)역시 작동실(2)및 토출구(28)(30)를 연결하는 연통로(48)(50)(52)(54)를 형성하여 각기 체크밸브(56)(58)(60)(62)에 의해 개폐되게 한다.The first compression chambers 10 and 12 form communication paths 32, 34, 36 and 38 that connect the operation chamber 4 and the discharge ports 28 and 30 on the main body 2. Communication paths for opening and closing by check valves 40, 42, 44 and 46, respectively, and connecting the second compression chamber 18 and 20 to the operation chamber 2 and the discharge ports 28 and 30, respectively. 48, 50, 52, 54 are formed to be opened and closed by check valves 56, 58, 60, 62, respectively.

상기에 있어 제1압축실(10)(12)과 작동실(4)을 연결하는 연통로(32)(34)의 체크밸브(40)(42)는 그 스프링을 안내공(64)(66)에 끼워 설치된 푸시로드(68)(70)가 지지토록 하고, 상기 푸시로드(68)(70)의 안내공(64)(66)은 토출구(28)(30)의 통로(72)(74)와 연통되게 하여 토출구(28)(30)로부터 발생되는 고부하시에만 슬라이딩 작동되게 한다.In the above, the check valves 40 and 42 of the communication paths 32 and 34 connecting the first compression chambers 10 and 12 and the operation chamber 4 guide the springs 64 and 66. The push rods 68 and 70 installed on the support rods, and the guide holes 64 and 66 of the push rods 68 and 70 pass through the passages 72 and 74 of the discharge holes 28 and 30, respectively. ) So that the sliding operation is performed only at the high load generated from the discharge holes 28 and 30.

피스톤(14)(16)은 제1압축실(10)(12)과 제2압축실(18)(20)사이에 설치하여 제2압축실(18)(20)내부로 출몰작동하는 몸체(76)(78)에 비해 제1압축실(10)(12)쪽에 위치한 피스톤링(80)(82)의 직경을 크게 형성하고, 그 중앙에는 유입로(84)(86)를 관통 형성하여 제1압축실(10)(12)쪽으로부터 체크밸브(88)(90)가 차단토록 하며, 제1압축실(10)(12)과 토출구(28)(30)사이의 체크밸브(44)(46)의 크래킹압력보다 큰 탄발력의 스프링(92)(94)이 내측으로 탄력 지지토록 하여 고압에서만 작동되게 한다.The pistons 14 and 16 are installed between the first compression chambers 10 and 12 and the second compression chambers 18 and 20 so as to be indented and operated inside the second compression chambers 18 and 20. Compared with 76 and 78, the diameters of the piston rings 80 and 82 located on the side of the first compression chamber 10 and 12 are made larger, and through the inflow paths 84 and 86 are formed in the center thereof. The check valves 88 and 90 are shut off from the first compression chamber 10 and 12 side, and the check valve 44 between the first compression chambers 10 and 12 and the discharge ports 28 and 30 ( A spring 92, 94 of elasticity greater than the cracking pressure of 46) is elastically supported inward to operate only at high pressure.

본 발명은 작동실(4)의 흡입구(22)에 유압공급호스를 연결하고, 토출구(28)(30)는 각종 유압기기(도시안됨)와 연결한 뒤 전동기를 구동시켜 주게 되면 플랜저(6)(8)의 왕복작동으로 유압유가 토출구로 토출되면서 유압기기를 동작시켜 주게 되므로 유압펌프로서의 기능을 하게 된다.The present invention connects the hydraulic supply hose to the suction port 22 of the operation chamber 4, the discharge port 28, 30 is connected to a variety of hydraulic equipment (not shown) to drive the motor and then the flanger (6) The hydraulic oil is discharged to the discharge port by the reciprocating operation of (8) to operate the hydraulic device, thus functioning as a hydraulic pump.

이러한 플랜저(6)(8)의 펌핑 작동시 유압기기로부터 저부하가 발생되면 도2에서와 같이 강한 탄발력의 스프링(92)(94)이 지지하고 있는 피스톤(14)(16)은 동작하지 않고, 제1압축실(10)(12)과 작동실(4)을 연결하는 연통로(32)(34)의 체크밸브(40)(42)가 개폐되어 많은 량의 유압유가 제1압축실(10)(12)내에 유입되며 유입된 유압유는 토출구(28)(30)를 연결하는 연통로(36)(38)의 체크밸브(44)(46)개방으로 곧바로 토출구(28)(30)로 토출되는 작동을 반복하게 된다.When a low load is generated from the hydraulic device during the pumping operation of the flanger 6 and 8, the pistons 14 and 16 supported by the springs 92 and 94 having strong elasticity as shown in FIG. 2 do not operate. Instead, the check valves 40 and 42 of the communication paths 32 and 34 connecting the first compression chambers 10 and 12 to the operation chamber 4 are opened and closed, so that a large amount of hydraulic oil flows in the first compression chamber. The hydraulic oil introduced into (10) and (12) flows straight into the check valves (44) and (46) of the communication passages (36) and (38) connecting the discharge ports (28) and (30). The operation discharged to is repeated.

그리고 유압기기로부터 고부하가 발생되면 푸시로드(68)(70)는 토출구(28)(30)의 통로(72)(74)로부터 작용하는 고압에 밀려 그 단부가 제1압축실(10)(12)과 작동실(4)의 연통로(32)(34)에 설치된 체크밸브(40)(42)를 차단하게 되고, 토출구(28)(30)와의 사이에 설치된 체크밸브(44)(46)는 통로(72)(74)에서 발생되는 고압에 의해 차단된다.When a high load is generated from the hydraulic device, the push rods 68 and 70 are pushed by the high pressure acting from the passages 72 and 74 of the discharge ports 28 and 30 so that the ends thereof are the first compression chambers 10 and 12. ) And the check valves 40 and 42 installed in the communication paths 32 and 34 of the operation chamber 4 are blocked, and the check valves 44 and 46 provided between the discharge ports 28 and 30. Is blocked by the high pressure generated in the passages 72, 74.

따라서 제1압축실(10)(12)은 유압유의 유입 및 토출이 전혀 이루어지지 않은 채 내부압만 증가하게 되므로 피스톤(14)(16)이 작동하게 되고, 상기 피스톤(14) (16)의 작동시 그 몸체(76)(78)단부가 제2압축실(18)(20)내부로 일부 돌출함에 따라 2차압축실(18)(20)의 내부압이 증가하게 되고 이러한 내부압 증가시 제2압축실의 일부 유압유가 토출구(28)(30)와의 연통로(52)(54)에 설치된 체크밸브(60)(62)의 개폐로 토출구(28)(30)로 토출된다.Therefore, the first compression chamber (10) (12) is to increase the internal pressure without the inflow and discharge of the hydraulic oil at all, so that the piston (14) (16) is operated, the piston (14) In operation, the internal pressure of the secondary compression chambers 18 and 20 increases as the ends of the body 76 and 78 partially protrude into the second compression chambers 18 and 20. Part of the hydraulic oil in the second compression chamber is discharged to the discharge ports 28 and 30 by opening and closing the check valves 60 and 62 provided in the communication paths 52 and 54 with the discharge ports 28 and 30.

이때 제2압축실(18)(20)을 통한 유압유의 토출량은 제1압축실(10)(12)을 통하여 작용하는 피스톤(14)(16)의 피스톤링(80)(82)직경과 제2압축실(18)(20)로 돌출되는 몸체(76)(78)의 직경 차이에 의해 적은 량만 토출된다.At this time, the discharge amount of the hydraulic oil through the second compression chamber (18) (20) is the diameter of the piston ring (80) (82) and the piston ring of the piston (14) (16) acting through the first compression chamber (10) (12) Only a small amount is discharged by the difference in the diameters of the bodies 76 and 78 protruding into the two compression chambers 18 and 20.

유압유의 토출후에는 플랜저(6)(8)의 후퇴작동으로 제1압축실(10)(12)의 내부에 압력이 낮아지게 되면 피스톤(14)(16)은 그 압력차이 및 스프링(92)(94)의 반발력으로 후퇴하게 되고, 상기 피스톤(14)(16)의 후퇴시 토출구(28)(30)를 연결하는 체크밸브(60)(62)는 차단되고, 작동실(4)을 연결하는 연통로(48)(50)의 체크밸브(56)(58)는 개폐 작동을 하여 토출된 량만큼의 유압유가 제2압축실(18)(20)내에 유입되게 하는 작동을 반복하게 된다.After the discharge of the hydraulic oil, when the pressure inside the first compression chambers 10 and 12 is lowered due to the retraction operation of the flanger 6 and 8, the pistons 14 and 16 are connected to the pressure difference and the spring 92. Retracted by the repulsive force of 94, the check valves 60, 62 connecting the discharge ports 28, 30 at the time of retraction of the piston 14, 16 is blocked, and the operating chamber 4 is connected The check valves 56 and 58 of the communication paths 48 and 50 are opened and closed to repeat the operation of allowing the hydraulic oil to flow into the second compression chambers 18 and 20 by the amount discharged.

이러한 펌핑작동시 제1압축실(10)(12)내에 진공압이 발생되면 피스톤(14) (16)의 유입로(84)(86)에 설치된 체크밸브(88)(90)의 개폐로 제2압축실(18)(20)로부터 제1압축실(10)(12)내에 유압유가 보충되므로 오작동이 거의 없고 또 상시 적정압력을 유지해 주게 된다.When a vacuum pressure is generated in the first compression chambers 10 and 12 during the pumping operation, the opening and closing of the check valves 88 and 90 provided in the inflow paths 84 and 86 of the pistons 14 and 16 are removed. Since hydraulic oil is replenished in the first compression chambers 10 and 12 from the two compression chambers 18 and 20, there is almost no malfunction and maintains a proper pressure at all times.

이상에서와 같이 본 발명은 저부하시에는 플랜저(6)(8)의 왕복작동으로 많은 량의 유압유가 제1압축실(10)(12)내에 유입되어 전량 토출구(28)(30)로 토출시켜 저압펌프로서의 기능을 갖도록 하고, 고부하시에는 플랜저(6)(8)의 왕복작동시 제1압축실(10)(12)의 내부압증가로 피스톤(14)(16)이 작동되게 되면 상기 피스톤(14)(16)의 피스톤링(80)(82)과 몸체(76)(78)의 직경차이에 의해 제2압축실(18)(20)의 유압유가 소량 토출구(28)(30)로 토출되게 하여 고압 펌프로서의 기능을 갖도록 하므로서 고부하시에도 작동효율을 극대화시켜 줄 수 있는 유용한 발명인 것이다.As described above, according to the present invention, a large amount of hydraulic oil flows into the first compression chambers 10 and 12 by the reciprocating operation of the flanger 6 and 8 at the time of low load, thereby discharging all of the hydraulic oil into the discharge ports 28 and 30. When the piston 14, 16 is operated by the internal pressure increase of the first compression chamber 10, 12 during the reciprocating operation of the flanger (6) (8) at the time of high load, the piston (14) The hydraulic oil in the second compression chamber (18) (20) is discharged to the outlet (28) (30) by the diameter difference between the piston rings (80) (82) and the bodies (76) (78). It is a useful invention that can maximize the operating efficiency even at high loads by having a function as a high pressure pump to be discharged.

Claims (1)

본체(2)중앙의 작동실(4)을 사이에 두고 플랜저(6)(8)가 출몰 작동하는 제1압축실(10)(12)과 피스톤(14)(16)이 출몰 작동하는 제2압축실(18)(20)을 차례로 설치하되 상기 피스톤(14)(16)은 제1,2압축실(10)(12)(18)(20)사이에 탄력 설치하여 직경이 작은 몸체(76)(78)가 제2압축실(18)(20)내부로 출몰 작동되게 하고, 제1,2압축실(10)(12)(18)(20)은 체크밸브가 설치된 각기 다른 연통로를 통하여 작동실(4)및 토출구(28)(30)와 연통되게 하고, 제1압축실(10)(12)과 작동실(4)을 연결하는 연통로(32)(34)의 체크밸브(40)(42)는 토출구(28)(30)의 안내공(64)(66)에 끼워 설치된 푸시로드(68)(70)가 지지토록 하여 고부하시 상기 푸시로드(68)(70)가 체크밸브(40)(42)를 강제 차단토록 하여서 됨을 특징으로 하는 산업용 유압펌프.The first compression chambers 10 and 12 and the pistons 14 and 16, which are operated by the flanger 6 and 8, with the operation chamber 4 in the center of the main body 2 interposed therebetween Compression chambers 18 and 20 are sequentially installed, but the pistons 14 and 16 are elastically installed between the first and second compression chambers 10, 12, 18, and 20 so that a small diameter body 76 (78) is in and out of the second compression chamber (18) 20, and the first and second compression chambers (10) (12) (18, 20) are connected to different communication paths with check valves The check valve of the communication passages 32 and 34 which communicates with the operating chamber 4 and the discharge ports 28 and 30 and connects the first compression chamber 10 and 12 with the operating chamber 4. 40 and 42 are supported by the push rods 68 and 70 installed in the guide holes 64 and 66 of the discharge holes 28 and 30 so that the push rods 68 and 70 are checked at high load. Industrial hydraulic pump, characterized in that to force shut off the valve (40) (42).
KR1019980054297A 1998-12-09 1998-12-09 Industrial hydraulic pump KR100284509B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100712948B1 (en) * 2005-11-24 2007-04-30 김가나 A oil pressure pump
KR100739504B1 (en) * 2007-03-13 2007-07-13 (주) 대진유압기계 Portable automatic pump
KR20180063913A (en) * 2016-11-30 2018-06-14 주식회사 영동테크 Spring combination structure of pusher for supporting pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100712948B1 (en) * 2005-11-24 2007-04-30 김가나 A oil pressure pump
KR100739504B1 (en) * 2007-03-13 2007-07-13 (주) 대진유압기계 Portable automatic pump
KR20180063913A (en) * 2016-11-30 2018-06-14 주식회사 영동테크 Spring combination structure of pusher for supporting pump

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