KR0138160Y1 - Piston pump - Google Patents

Piston pump Download PDF

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Publication number
KR0138160Y1
KR0138160Y1 KR2019930012039U KR930012039U KR0138160Y1 KR 0138160 Y1 KR0138160 Y1 KR 0138160Y1 KR 2019930012039 U KR2019930012039 U KR 2019930012039U KR 930012039 U KR930012039 U KR 930012039U KR 0138160 Y1 KR0138160 Y1 KR 0138160Y1
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KR
South Korea
Prior art keywords
discharge
cylinder block
flow path
housing
valve plate
Prior art date
Application number
KR2019930012039U
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Korean (ko)
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KR950004075U (en
Inventor
차순용
Original Assignee
김연수
삼성중공업주식회사
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Priority to KR2019930012039U priority Critical patent/KR0138160Y1/en
Publication of KR950004075U publication Critical patent/KR950004075U/en
Application granted granted Critical
Publication of KR0138160Y1 publication Critical patent/KR0138160Y1/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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/128—Driving means
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2035—Cylinder barrels
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2042—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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2064—Housings
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • 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
    • F04B53/001—Noise damping
    • 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
    • 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
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

본 고안은 다연 피스톤 펌프에 관한 것이며, 더욱 구체적으로는 축과 함께 회전가능한 하우징커버에 지지된 실린더블럭의 피스톤보어에 축방향으로 습동되어 압입하는 다수의 피스톤이 결합된 실린더블럭의 일측에 접촉하여 흡기포트와 토출포트를 형성하고 있는 밸브플레이트를 가진 다연 피스톤 펌프에 있어서, 상기 실린더블럭이 우수개의 실린더실과 각기 다른 동심원상의 3열로 배열된 유로포트를 형성하고 상기 밸브플레이트가 상기 실린더블럭의 유로포트의 어떤것과 연통하는 흡기포트와 하우징에 형성된 토출유로에 연통하는 토출포트를 가지며, 상기 하우징의 토출유로를 통하여 각각 독립된 펌프토출유량을 얻되, 상기 하우징의 토출유로를 통하는 토출유압의 일부가 가변유압조절부에 관계하여 스풀의 하중과 스프링의 탄성력에 따라 경전가능하게 상기 실린더블럭에 결합된 사판에 의해 토출유량의 정마력 제어를 얻도록 형성됨을 특징으로 하여 축방향의 콤팩트화를 달성함과 동시에 각 피스톤 열과 밸브플레이트 및 하우징의 유로가 완전한 연통을 이루어 진동 및 소음이 발생하지 않아 미니굴삭기와 크롤라등 소형중장비에 적용되어 하부주행체 사행을 방지하는데 매우 효과적인 고안이다.The present invention relates to a multiple piston pump, and more particularly, in contact with one side of the cylinder block is coupled to a plurality of pistons axially slid into the piston bore of the cylinder block supported by the housing cover that is rotatable with the shaft. In a multiple piston pump having a valve plate forming an intake port and a discharge port, the cylinder block forms an excellent number of cylinder chambers and flow path ports arranged in three rows of different concentric circles, and the valve plate is a flow path of the cylinder block. An intake port communicating with any of the discharge ports and a discharge port communicating with the discharge flow path formed in the housing, each having an independent pump discharge flow rate through the discharge flow path of the housing, wherein a part of the discharge hydraulic pressure through the discharge flow path of the housing is variable hydraulic pressure; In relation to the adjusting part, It is formed so as to obtain the static horsepower control of the discharge flow rate by the swash plate coupled to the cylinder block so as to achieve compactness in the axial direction, and at the same time, the flow path of each piston row, the valve plate and the housing is in perfect communication. It does not generate vibration and noise, so it is applied to small heavy equipment such as mini excavator and crawler and it is very effective to prevent meandering of undercarriage.

Description

다연 피스톤 펌프Multiple piston pump

제1도는 종래 다연 피스톤 펌프의 단면도.1 is a cross-sectional view of a conventional multiple piston pump.

제2도는 본 고안의 다연 피스톤 펌프의 단면도.2 is a cross-sectional view of the multiple piston pump of the present invention.

제3도는 (a)는 제2도의 A-A선에 따른 밸브플레이트의 단면도.3 is a cross-sectional view of the valve plate taken along the line A-A of FIG.

(b)는 제2도의 B-B선에 따른 실린더블럭의 단면도이다.(b) is sectional drawing of the cylinder block along the B-B line | wire of FIG.

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

1 : 사판각도 조절장치 2 : 실린더블럭1: swash plate angle adjusting device 2: cylinder block

3 : 축 4 : 피스톤보어3: shaft 4: piston bore

5 : 피스톤 6 : 밸브플레이트5: Piston 6: Valve Plate

7 : 유로포트 8 : 흡기포트7: Euro port 8: Intake port

9 : 토출포트 10 : 사구9: discharge port 10: dune

11 : 커넥터 12 : 하우징커버11 connector 12 housing cover

13 : 스프링 14 : 누름편13: spring 14: pressing piece

15 : 가변유압 조절부 16 : 하우징15: variable hydraulic pressure control unit 16: housing

17 : 흡입유로 18 : 토출유로17: suction flow path 18: discharge flow path

19 : 피이드백 유로 20 : 스풀19: feedback euro 20: spool

21 : 실린더실 22 : 사판21: cylinder chamber 22: swash plate

23 : 로드 24 : 노치23: Load 24: Notch

본 고안은 다연 피스톤 펌프에 관한 것이며, 더욱 상세하게는 1개의 유압출구와 연결된 우수개의 실린더를 가진 실린더블럭에 사판각도 조절장치에 결합되는 우수개의 피스톤을 삽설하고 2개의 유압토출구를 통하여 정마력의 토출유압을 얻도록 형성된 것에 관한 것이다.The present invention relates to a multiple piston pump, and more particularly, inserts an excellent piston coupled to the swash plate angle adjusting device to a cylinder block having an even cylinder connected to one hydraulic outlet, and provides a positive horsepower through two hydraulic outlets. It is related to being formed to obtain the discharge hydraulic pressure.

일반적으로 다연 피스톤 펌프는 펌프로 유입되는 유량을 동일한 복수의 정마력으로 토출시킴으로서 굴삭기나 휠로다등의 중장비 하부추진체의 주행장치에 주로 이용되고 있다.In general, the multiple piston pump is mainly used in the traveling device of heavy machinery lower propulsion bodies such as excavators and wheel loaders by discharging the flow rate flowing into the pump with the same plural horsepower.

이러한 종래 다연 피스톤 펌프는 제1도에 도시된 바와같이 사판각도 조절장치(1)와 실린더블럭(2)으로 이루어진 복수개의 펌프를 축(3)의 방향으로 직렬로 연설하여 사용하거나 또는 축(3)을 기어로 연설하여 정마력의 토출유압을 얻도록 사용되고 있다.The conventional multiple piston pump uses a plurality of pumps composed of the swash plate angle adjusting device 1 and the cylinder block 2 as shown in FIG. 1 in series in the direction of the shaft 3, or the shaft 3 It is used to obtain the discharge hydraulic pressure of horsepower by speaking with gears.

그러나, 상기와 같은 종래의 다연 피스톤 펌프는 실제 소형중장비의 주행장치에 적용될 경우 축(3)방향으로 2배에 근사한 치수의 스페이스를 차지하므로서 장비의 콤팩트(compact)화에 어려움이 있었으며, 이 문제를 해결하기 위해 배분밸브를 사용하여 1개의 펌프토출포트에 연결된 유로를 분지하고 있으나 엔진의 부하압력에 따른 유량변동이 발생하는 문제가 있었다.However, the conventional multi-ply piston pump as described above has difficulty in compacting the equipment because it occupies a space of approximately two times the dimension in the axial direction when applied to a traveling device of a small heavy equipment. In order to solve the problem, the flow path connected to one pump discharge port is branched by using a distribution valve, but there is a problem that a flow rate fluctuation occurs according to the load pressure of the engine.

따라서, 본 고안은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 축방향으로 차지하는 펌프의 크기를 단축화함과 동시에 피스톤 열이 완전한 연통을 이루어 진동 및 소음이 적고 분배밸브등을 필요로 하지 않는 다연 피스톤 펌프를 제공함에 그 목적이 있다.Therefore, the present invention was devised to solve the above problems, while reducing the size of the pump occupying in the axial direction, and at the same time, the piston column is in perfect communication, thus reducing vibration and noise, and eliminating the need for a distribution valve. The purpose is to provide a piston pump.

상기 목적을 달성하기 위한 본 고안의 특징은 축과 함께 회전가능한 하우징커버에 지지된 실린더블럭의 피스톤보어에 축방향으로 습동되어 압입하는 다수의 피스톤이 결합된 실린더블럭의 일측에 접촉하여 흡기포트와 토출포트를 형성하고 있는 밸브플레이트를 가진 다연 피스톤펌프에 있어서, 상기 실린더블럭이 우수개의 실린더실과 각기 다른 동심원상의 3열로 배열된 유로포트를 형성하고, 상기 밸브플레이트가 상기 실린더블럭의 유로포트의 어떤 것과 연통하는 흡기포트와, 하우징에 형성된 토출유로에 연통하는 토출포트를 가지며 상기 하우징의 토출유로를 통하여 각각 독립된 펌프토출유량을 얻되, 상기 하우징의 토출유로를 통하는 토출유압의 일부가 가변유압조절부에 관계하여 스풀의 하중과 스프링의 탄성력에 따라 경전가능하게 상기 실린더블럭에 결합된 사판에 의해 토출유량의 정마력 제어를 얻도록 형성된 것에 있다.Features of the present invention for achieving the above object is in contact with the intake port in contact with one side of the cylinder block is coupled to the piston bore axially slid into the piston bore of the cylinder block supported by the rotatable housing cover In a multiple piston pump having a valve plate forming a discharge port, the cylinder block forms an excellent number of cylinder chambers and flow path ports arranged in three rows in different concentric circles, and the valve plate is formed by a certain number of the flow path ports of the cylinder block. And an intake port in communication with the discharge passage formed in the housing, and a discharge port communicating with the discharge passage formed in the housing, respectively, to obtain an independent pump discharge flow rate through the discharge passage of the housing, wherein a part of the discharge hydraulic pressure through the discharge passage of the housing is a variable hydraulic pressure control unit. In relation to the load of the spool and the elastic force of the spring It is formed to obtain the static horsepower control of the discharge flow rate by the swash plate coupled to the cylinder block.

이하, 첨부된 도면을 참조하여 본 고안을 좀더 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

제2도는 본 고안의 다연 피스톤 펌프의 단면도이며, 제3도의 (a)는 제2도의 A-A선에 따른 밸브플레이트의 단면도이고, (b)는 제2도의 B-B선에 따른 실린더 블럭의 단면도이다.2 is a cross-sectional view of the multiple piston pump of the present invention, (a) is a cross-sectional view of the valve plate along the line A-A of FIG. 2, (b) is a cross-sectional view of the cylinder block along the line B-B of FIG.

상기 도면에 나타나 있는 바와 같이 본 고안의 다연 피스톤에 있어서, 실린더블럭(2)은 일측에서 사판각도 조절장치(1)와 결합된 피스톤보어(4)를 가진 우수개의 피스톤(5)이 축(3)방향으로 습동하도록 인입되어 있으며, 밸브플레이트(6)와 연통하도록 접촉하고 있는 타측에서 다른 동심원상에 배열된 3열의 유로포트(7)를 형성하고 있다.As shown in the figure, in the multiple piston of the present invention, the cylinder block 2 has an excellent piston 5 having a piston bore 4 coupled to the swash plate angle adjusting device 1 at one side thereof. It is drawn so as to slide in the direction of) and forms three rows of flow path ports 7 arranged on the other concentric circle on the other side in contact with the valve plate 6 so as to communicate with it.

상기 밸브 플레이트(6)는 하우징(16)에 형성된 흡입유로(17)와 연통됨과 동시에 상기 실린더블럭(2)에 형성되어 있는 3열의 유로포트(7)와 연통하는 1개의 원호형상의 흡기포트(8)를 가지며, 상기 3열의 유로포트(7)와 선택적으로 어떤 방향에서 연통하는 서로 다른 동심원상에 배치된 원호형상의 토출포트(9)를 가지고 있다.The valve plate 6 communicates with the suction flow path 17 formed in the housing 16 and at the same time has one arc-shaped intake port communicating with the three rows of flow path ports 7 formed in the cylinder block 2. 8) and an arc-shaped discharge port 9 arranged on different concentric circles communicating with the three rows of flow ports 7 and optionally in a certain direction.

상기 사판각도 조절장치(1)는 상기 축(3)의 외주면에 사구(10)로 접촉되어 장착됨과 동시에 타측의 일단부에서 상기 하우징커버(12)를 지점으로 스프링(13)으로 탄발하는 누름편(14)이 설치되어 있다.The swash plate angle adjusting device 1 is mounted on the outer circumferential surface of the shaft 3 in contact with the sand dunes 10 and at the same time, the pressing piece which springs the housing cover 12 with the spring 13 at one end of the other side. (14) is provided.

한편, 상기 사판각도 조절장치(1)에 로드(23)로서 접촉하고 있는 가변유압 조절부(15)는 상기 하우징(16)에 구비된 2열 토출유로(18)의 유압에 따라 관계하는 2열의 피이드백 유로(19)가 형성되어 있으며, 상기 2열의 유로(19)내에서 각각의 유압에 따라 상기 로드(23)를 역동시키는 스풀(20)이 각각 장착되어 있다.On the other hand, the variable hydraulic pressure adjusting unit 15 which is in contact with the swash plate angle adjusting device 1 as the rod 23 has two rows in relation to the hydraulic pressure of the two-row discharge passage 18 provided in the housing 16. The feedback flow path 19 is formed, and the spools 20 for rotating the rod 23 in accordance with the respective hydraulic pressures are mounted in the two rows of flow paths 19, respectively.

상기와 같이 구성된 본 고안의 다연 피스톤 펌프의 작용 및 효과를 설명하면 다음과 같다.Referring to the operation and effects of the multiple piston pump of the present invention configured as described above are as follows.

흡입공정에서 상기 축(3)의 회전구동에 의해 이에 결합된 상기 실린더블럭(2)의 피스톤보어(4)와 결합된 사판각도 조절장치(1)가 회전함에 따라 상기 흡입유로(17)로 유입한 작동유가 상기 밸브플레이트(6)의 흡기포트(8)의 원호형상을 통하여 상기 실린더블럭(2)의 3열 유로포트(7)를 통과 실린더블럭(2)의 실린더실(21)내로 흡입된다. 토출공정에서는 상기 축(3)이 더 회전구동하여 이에 연결장착된 상기 사판각도조절장치(1)가 더 회전하여 자체의 소정각도만큼 상기 실린더실(21)로 흡입된 작동유가 펌핑되며, 이때 상기 실린더블럭(2)의 실린더실(21) 내의 작동유를 3열 포트(7)의 어떤 한 방향과 연통하는 밸브플레이트의 다른 동심원상의 각 토출포트(9)를 통하여 상기 하우징(16)에 형성된 독립된 2열의 토출유로(18)를 통하여 작동유를 토출한다.The swash plate angle adjusting device 1 coupled to the piston bore 4 of the cylinder block 2 coupled thereto by the rotational driving of the shaft 3 in the suction process flows into the suction flow path 17. One hydraulic fluid is sucked into the cylinder chamber 21 of the cylinder block 2 through the three-row flow path port 7 of the cylinder block 2 through the arc shape of the intake port 8 of the valve plate 6. . In the discharging process, the shaft 3 is further driven to rotate, and the swash plate angle adjusting device 1 connected thereto is further rotated to pump the hydraulic oil sucked into the cylinder chamber 21 by a predetermined angle thereof. Independent 2 formed in the housing 16 via each discharge port 9 on the other concentric circle of the valve plate communicating hydraulic oil in the cylinder chamber 21 of the cylinder block 2 with any one direction of the three-row port 7. The hydraulic oil is discharged through the heat discharge passage 18.

한편, 상기 2열의 토출유로(18)으로 유출하는 작동유는 상기 가변유압 조절부(15)의 2열유로(19)에 연결되어 항상 일정한 피이드백 유압을 발생시키며, 이 경우 상기 하우징(16)의 독립된 2개의 토출유압이 성함과 동시에 각 피스톤 열과 밸브플레이트 및 하우징의 유로가 완전한 연통을 이루어 진동 및 소음이 발생하지 않아 미니굴삭기나 크롤라등 소형중장비에 적용되어 하부주행체 사행을 방지하는데 매우 효과적인 고안이다.On the other hand, the hydraulic oil flowing out of the two rows of the discharge flow path 18 is connected to the second row of flow paths 19 of the variable hydraulic pressure control unit 15 to generate a constant feedback hydraulic pressure, in this case, of the housing 16 As two independent discharge hydraulic pressures are established, each piston row, valve plate and housing flow path are in perfect communication, and vibration and noise are not generated.It is applied to small heavy equipment such as mini excavators or crawlers, which is very effective in preventing the lowered vehicle from meandering. It is devised.

Claims (1)

축(3)과 함께 회전가능한 하우징커버(12)에 지지된 실린더블럭(2)의 피스톤보어(4)에 축방향으로 습동되어 압입하는 다수의 피스통(5)이 결합된 실린더블럭(2)의 일측에 접촉하여 흡기포트(8)와 토출포트(9)를 형성하고 있는 밸브플레이트(6)를 가진 다연 피스톤펌프에 있어서, 상기 실린더블럭(2)이 우수개의 실린더실(21)과 각기 다른 동심원상의 3열로 배열된 유로포트(7)를 형성하고, 상기 밸브플레이트(6)가 상기 실린더블럭(2)의 유로포트(7)의 어떤 것과 연통하는 흡기포트(8)와 하우징(16)에 형성된 토출유로(18)에 연통하는 토출포트(9)를 가지며, 상기 하우징(16)의 토출유로(18)를 통하여 각각 독립된 펌프토출유량을 얻되, 상기 하우징(16)의 토출유로(18)를 통하는 토출유압의 일부가 가변유압조절부(15)에 관계하여 스풀(20)의 하중과 스프링(13)의 탄성력에 따라 경전가능하게 상기 실린더블럭(2)에 결합된 사판(22)에 의해 토출유량의 정마력 제어를 얻도록 형성됨을 특징으로 하는 다연 피스톤 펌프.Cylinder block (2) coupled with a plurality of piece cylinders (5) slidably axially pushed into the piston bore (4) of the cylinder block (2) supported by the rotatable housing cover (12) together with the shaft (3). In a multiple piston pump having a valve plate (6) in contact with one side of the inlet port (8) and the outlet port (9), the cylinder block (2) is different from the superior cylinder chamber (21). The inlet port 8 and the housing 16 which form a concentric three-row flow path port 7 and the valve plate 6 communicates with any of the flow path ports 7 of the cylinder block 2. A discharge port 9 communicating with the discharge passage 18 formed therein, and each pump discharge flow rate is obtained through the discharge passage 18 of the housing 16, and the discharge passage 18 of the housing 16 is Part of the discharge hydraulic pressure passing through depends on the load of the spool 20 and the elastic force of the spring 13 in relation to the variable hydraulic pressure control unit 15. Synchro piston pump, characterized by formed so as to obtain a constant-horsepower control of the discharge flow rate by enabling Scriptures the swash plate 22 coupled to the cylinder block (2).
KR2019930012039U 1993-07-01 1993-07-01 Piston pump KR0138160Y1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130066272A (en) * 2011-12-12 2013-06-20 현대중공업 주식회사 Shaft connecting structure of swashplate type hydraulic pump
WO2020151107A1 (en) * 2019-01-24 2020-07-30 姚挽荣 Swing bearing-driven plunger booster pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10968741B2 (en) * 2019-02-08 2021-04-06 Volvo Car Corporation Variable pre and de-compression control mechanism and method for hydraulic displacement pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130066272A (en) * 2011-12-12 2013-06-20 현대중공업 주식회사 Shaft connecting structure of swashplate type hydraulic pump
WO2020151107A1 (en) * 2019-01-24 2020-07-30 姚挽荣 Swing bearing-driven plunger booster pump

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