KR100598766B1 - Hydraulic Piston Pumps & Motors - Google Patents
Hydraulic Piston Pumps & Motors Download PDFInfo
- Publication number
- KR100598766B1 KR100598766B1 KR1020040090507A KR20040090507A KR100598766B1 KR 100598766 B1 KR100598766 B1 KR 100598766B1 KR 1020040090507 A KR1020040090507 A KR 1020040090507A KR 20040090507 A KR20040090507 A KR 20040090507A KR 100598766 B1 KR100598766 B1 KR 100598766B1
- Authority
- KR
- South Korea
- Prior art keywords
- piston
- cylinder block
- motor
- hydraulic
- drive shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
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
- F04B1/122—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
- F04B1/20—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
- F04B1/2064—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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
-
- 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
- F05B2280/00—Materials; Properties thereof
- F05B2280/10—Inorganic materials, e.g. metals
- F05B2280/1072—Copper alloys
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
Abstract
본 발명은 유압 피스톤 펌프·모터에 관한 것으로, 좀 더 상세하게는 중공 피스톤의 내측 일부분에 둥근 형태의 구형 피스톤단부를 형성하여 피스톤 내에 형성된 압력에 따른 탄성 변형을 이용하여 피스톤과 실린더블록 사이의 틈새를 자동 조절되게 함으로써 압력의 변화에 따른 외부 누유량을 저감시켜 성능을 향상시킬 수 있는 유압 피스톤 펌프·모터에 관한 것이다.The present invention relates to a hydraulic piston pump and a motor, and more particularly, to form a spherical piston end portion having a rounded shape in an inner portion of a hollow piston, thereby using a clearance between the piston and the cylinder block using elastic deformation according to the pressure formed in the piston. The present invention relates to a hydraulic piston pump and a motor which can improve the performance by reducing the amount of external leakage caused by a change in pressure by automatically adjusting the pressure.
본 발명에 따른 유압 피스톤 펌프·모터는 베어링이 삽입 설치된 하우징과 흡입포트와 토출포트가 구비된 커버와 상기 하우징 내에서 회전 가능한 구동축과 상기 구동축에 의해 회전되며 소정의 경사각을 갖는 경사판과 상기 경사판에 설치되어 상기 구동축에 의해 회전되는 실린더블록과 상기 실린더블록 내에 형성된 적어도 하나 이상의 중공의 피스톤을 구비함에 따라 상기 구동축 회전시 상기 피스톤이 복동되면서 흡입행정과 토출행정을 교호적으로 수행하는 유압 피스톤 펌프·모터의 중공 피스톤의 내측 일부분에 둥근 형태의 구형 피스톤단부를 형성하는 구성과 상기 실린더 블록과 상기 중공 피스톤과의 흡입 및 토출 행정시 마찰을 줄이기 위해서 상기 실린더 블록 내면에 부시를 더 갖춘 것을 특징으로 한다.The hydraulic piston pump motor according to the present invention includes a housing in which a bearing is inserted, a cover provided with a suction port and a discharge port, a drive shaft rotatable in the housing, and an inclined plate having a predetermined inclination angle and the inclined plate which are rotated by the drive shaft. Hydraulic piston pump and motor which is installed and rotated by the drive shaft and at least one hollow piston formed in the cylinder block to perform the suction stroke and the discharge stroke alternately while the piston is doubled during the rotation of the drive shaft The inner portion of the hollow piston of the rounded spherical piston end portion is configured to form and further comprises a bush on the inner surface of the cylinder block to reduce the friction during the suction and discharge stroke of the cylinder block and the hollow piston.
펌프, 모터, 피스톤단부, 부시, 마찰, 누유, 변형Pump, motor, piston end, bush, friction, oil leakage, deformation
Description
도 1 종래의 유압 피스톤 펌프·모터의 단면도1 is a cross-sectional view of a conventional hydraulic piston pump motor
도 2 본 발명의 바람직한 실시예에 따른 유압 피스톤 펌프·모터의 단면도2 is a cross-sectional view of a hydraulic piston pump motor according to a preferred embodiment of the present invention.
도 3 본 발명의 바람직한 실시예에 따른 부시가 구비된 유압 피스톤 펌프·모터의 단면도3 is a cross-sectional view of a hydraulic piston pump motor with a bush according to a preferred embodiment of the present invention.
도 4 종래의 유압 피스톤 펌프·모터의 피스톤 단면도Piston sectional drawing of the conventional hydraulic piston pump motor
도 5 본 발명의 유압 피스톤 펌프·모터의 피스톤 단면도Fig. 5 Piston sectional view of the hydraulic piston pump motor of the present invention.
도 6 본 발명에 따른 내부 압력 작용시의 유압 피스톤 펌프·모터의 피스톤 단면도Fig. 6 Piston cross-sectional view of a hydraulic piston pump motor at the time of internal pressure action according to the present invention.
도 7 본 발명의 부시가 구비된 유압 피스톤 펌프·모터의 피스톤단부 확대도7 is an enlarged view of the piston end of the hydraulic piston pump motor with a bush of the present invention
도 8 종래의 실린더 블록과 피스톤 조립 단면도8 is a cross-sectional view of a conventional cylinder block and piston assembly
도 9 본 발명에 따른 부시가 구비된 유압 피스톤 펌프·모터의 실린더 블록과 피스톤 조립 단면도9 is a cylinder block and piston assembly cross-sectional view of a hydraulic piston pump motor with a bush according to the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
1 : 하우징 2 : 구동축 3 : 경사판DESCRIPTION OF
4 : 피스톤 슈 5 : 피스톤 6 : 실린더 블록4: piston shoe 5: piston 6: cylinder block
7 : 피스톤단부 8 : 부시 9 : 밸브플레이트7 piston end 8
10 : 커버 11 : 토출포트 12 : 흡입포트10
20 : 변형량20: deformation amount
본 발명은 유압 피스톤 펌프·모터에 관한 것으로, 좀 더 상세하게는 중공 피스톤의 내측 일부분에 둥근 형태의 구형 피스톤단부를 형성하여 피스톤 내에 형성된 압력에 따른 탄성 변형을 이용하여 피스톤과 실린더블록 사이의 틈새를 자동 조절되게 함으로써 압력의 변화에 따른 외부 누유량을 저감시켜 성능을 향상시킬 수 있는 유압 피스톤 펌프·모터에 관한 것이다.The present invention relates to a hydraulic piston pump and a motor, and more particularly, to form a spherical piston end portion having a rounded shape in an inner portion of a hollow piston, thereby using a clearance between the piston and the cylinder block using elastic deformation according to the pressure formed in the piston. The present invention relates to a hydraulic piston pump and a motor which can improve the performance by reducing the amount of external leakage caused by a change in pressure by automatically adjusting the pressure.
일반적으로 유압 피스톤 펌프는 엔진이나 전기모터 등으로부터 구동되어지는 기계에너지를 유체에너지로 변환하는 것이고, 유압 피스톤 모터는 유체에너지를 공급받아서 피스톤을 왕복 운동시키고 이 운동이 구동축을 회전시켜 기계에너지로 변환시키는 구동장치로서 그 출력밀도가 우수하고 출력이 좋아 중장비 등에 널리 사용되고 있다.In general, a hydraulic piston pump converts mechanical energy driven from an engine or an electric motor into fluid energy, and a hydraulic piston motor receives fluid energy and reciprocates a piston, and this movement rotates the drive shaft to convert into mechanical energy. It is a driving device to make it have excellent output density and good output, and is widely used in heavy equipment.
유압모터의 경우에는 도 1에 도시된 바와 같이 흡입포트를 통해 공급되는 유체가 밸브플레이트를 거쳐 실린더블록내의 피스톤에 공급되면 유압에 의해서 피스톤이 전진하게 된다. 이때 피스톤이 전진하면서 피스톤에 조립된 피스톤슈가 경 사판의 낮은 쪽으로 회전하게 되고, 이에 따라 실린더블록은 피스톤의 회전력에 의해서 회전하게 되면서 결국 구동축을 회전시켜 외부에 구동력을 전달하게 된다.In the case of the hydraulic motor, as shown in FIG. 1, when the fluid supplied through the suction port is supplied to the piston in the cylinder block through the valve plate, the piston is advanced by hydraulic pressure. At this time, as the piston moves forward, the piston shoe assembled to the piston rotates to the lower side of the inclined plate. Accordingly, the cylinder block is rotated by the rotational force of the piston and eventually rotates the drive shaft to transmit the driving force to the outside.
또한, 유압펌프의 경우에는 유압모터와는 반대로 도 1에 도시된 바와 같이 구동축을 엔진이나 전기모터에 의해 구동시켜주면 실린더블록이 회전하게 되고 이때 실린더블럭에 내장된 피스톤이 회전하면서 피스톤에 조립된 피스톤슈가 경사판을 따라 회전하게 되어 피스톤이 전진과 후진을 반복하게 된다. 이렇게 피스톤이 전진과 후진을 하면서 변화된 체적만큼 유체가 외부로 토출하게 된다.In addition, in the case of the hydraulic pump, as shown in FIG. 1, when the driving shaft is driven by an engine or an electric motor, as shown in FIG. 1, the cylinder block is rotated. At this time, the piston embedded in the cylinder block rotates and is assembled to the piston. The piston shoe rotates along the inclined plate, causing the piston to move forward and backward. As the piston moves forward and backward, the fluid is discharged to the outside by the changed volume.
이러한 유압 피스톤 펌프·모터의 효율은 기계효율과 용적효율의 곱으로 표시되어지며 기계효율은 상대운동을 하는 고체 간의 마찰에 기인한 것인 반면 용적효율은 실린더블록과 피스톤 사이의 틈새로 새어 나온 누유량에 따라 좌우되는데 일반적으로 누유량은 틈새의 3승에 비례하게 된다.The efficiency of the hydraulic piston pump and motor is expressed as the product of the mechanical efficiency and the volumetric efficiency. The mechanical efficiency is due to the friction between the solids moving in relative motion, while the volumetric efficiency leaks into the gap between the cylinder block and the piston. Depending on the flow rate, the leakage is generally proportional to the third power of the gap.
따라서 유압 피스톤 펌프·모터에 있어서 실린더블록과 피스톤 사이의 틈새를 늘이면 고체 마찰이 감소하지만 누유량이 증가하게 되고 피스톤 사이의 틈새를 줄이면 고체 마찰은 증가하지만 누유량이 감소하게 되는 반비례 관계가 성립하므로 기계효율과 용적효율의 곱으로 표시되는 최대 효율에 한계가 있게 된다.Therefore, in hydraulic piston pumps and motors, increasing the clearance between the cylinder block and the piston reduces the solid friction, but decreasing the leakage between the pistons increases the solid friction, but the inverse relationship between the leakage and the leakage is established. There is a limit to the maximum efficiency, expressed as the product of efficiency and volumetric efficiency.
또한, 실린더블록과 피스톤 사이의 틈새가 적게 되면 조립이 어려워짐은 물론 저압에서 저속으로 회전시킬 경우 마찰에 의한 스틱슬립으로 원활한 회전이 이루어지지 못하는 문제점도 있게 된다.In addition, if the gap between the cylinder block and the piston is less difficult to assemble, as well as when rotating at low pressure low speed there is also a problem that can not be smoothly rotated by the stick slip due to friction.
본 발명은 상기와 같은 문제를 해결하고자 발명된 것으로서, 베어링이 삽입 설치된 하우징과 흡입포트와 토출포트가 구비된 커버와 상기 하우징 내에서 회전 가능한 구동축과 상기 구동축에 의해 회전되며 소정의 경사각을 갖는 경사판과 상기 경사판에 설치되어 상기 구동축에 의해 회전되는 실린더블록과 상기 실린더블록 내에 형성된 적어도 하나 이상의 중공 피스톤을 구비함에 따라 상기 피스톤이 복동되면서 흡입행정과 토출행정을 교호적으로 수행하는 중공 피스톤의 내측 일부분에 둥근 형태의 구형 피스톤단부를 형성하여 고압에 의한 피스톤단부에 탄성 변형이 발생되게 함으로써 초기 틈새에 의한 용이한 조립과 저압 저속에서의 스틱슬립에 의한 마찰 최소화를 통한 원활한 회전과 고압에서의 탄성변형에 의한 피스톤과 실린더블록의 틈새를 좁혀 누유량을 최소화함으로써 효율을 증대 시킬 수 있는 유체 피스톤 펌프·모터를 제공함에 목적으로 한다.The present invention has been invented to solve the above problems, a housing in which a bearing is inserted, a cover provided with a suction port and a discharge port, and an inclined plate rotated by the drive shaft rotatable in the housing and the drive shaft and having a predetermined inclination angle. And a cylinder block installed on the inclined plate and at least one hollow piston formed in the cylinder block, the piston being double-actuated to the inner portion of the hollow piston alternately performing suction stroke and discharge stroke. By forming a spherical piston end of round shape, elastic deformation occurs at the piston end by high pressure, so that it is easy to assemble by the initial gap and minimizes friction by stick slip at low pressure and low speed. Between piston and cylinder block A narrow and the press efficiency by minimizing the flow rate in order to provide a fluid piston pump, the motor can be increased.
또한, 실린더블록 내면에 부시를 더 갖추어 실린더블록과 피스톤 사이의 마찰을 줄이는 유체 피스톤 펌프·모터를 제공함을 목적으로 한다
In addition, an object of the present invention is to provide a fluid piston pump and motor which further includes a bush on the inner surface of the cylinder block to reduce friction between the cylinder block and the piston.
본 발명은 상기와 같은 목적을 달성하기 위한 유체 피스톤 펌프·모터를 제공하기 위하여 창출한 것으로, 베어링이 삽입 설치된 하우징과 흡입포트 및 토출포트가 구비된 커버와 하우징 내에서 회전 가능한 구동축과 소정의 경사각을 갖는 경사판과 경사판에 설치되어 회전되는 실린더블록과 실린더블록 내에 형성된 적어도 하나 이상의 중공 피스톤을 구비함에 따라 피스톤이 복동되면서 흡입행정과 토출행정을 교호적으로 수행하는 유압 피스톤 펌프·모터의 중공 피스톤의 내측 일부분에 둥근 형태의 구형 피스톤단부를 형성하는 구성과 실린더 블록과 피스톤과의 마찰을 줄이기 위해서 실린더블록 내면에 부시를 더 갖춘 것을 특징으로 한다.The present invention has been made to provide a fluid piston pump and motor for achieving the above object, and includes a housing in which a bearing is inserted, a cover provided with a suction port and a discharge port, and a drive shaft rotatable within the housing and a predetermined inclination angle. The inner side of the hollow piston of the hydraulic piston pump motor to alternately perform the suction stroke and the discharge stroke as the piston is double-actuated by having a cylinder block and at least one hollow piston formed in the cylinder block is rotated installed on the inclined plate and It is characterized by further comprising a bush on the inner surface of the cylinder block to reduce the friction between the cylinder block and the piston and the configuration to form a spherical piston end of a round shape.
이에 따라 본 발명에 따른 유체 피스톤 펌프·모터는 초기 실린더블록과 피스톤 사이에 틈새가 충분하여 원활한 조립과 저압 저속시의 스틱슬립에 의한 마찰을 최소화할 수 있고 고압시 피스톤단부의 탄성변형에 의한 실린더블록과 피스톤 사이의 틈새가 좁아져 누유량이 줄어 효율을 증대시킬 수 있다.Accordingly, the fluid piston pump motor according to the present invention has a sufficient gap between the initial cylinder block and the piston to minimize friction due to smooth assembly and stick slip at low pressure and low pressure, and the cylinder by elastic deformation of the piston end at high pressure. The gap between the block and the piston is narrowed to reduce the leakage and increase the efficiency.
본 발명은 첨부된 도면을 참조하여 후술하는 바람직한 실시예를 통하여 더욱 명백해질 것이다. 이하에서는 본 발명을 이러한 실시예를 통해 당업자가 용이하게 이해하고 재현할 수 있도록 유압 피스톤 펌프를 예로 들어 상세히 설명하기로 한다.The invention will become more apparent through the preferred embodiments described below with reference to the accompanying drawings. Hereinafter, the hydraulic piston pump will be described in detail by way of example so that those skilled in the art can easily understand and reproduce the present invention through these embodiments.
도 2와 도3에 도시된 바와같이, 본 발명에 따른 유압 피스톤 펌프는 베어링이 삽입 설치된 하우징(1)과 흡입포트(12) 및 토출포트(11)가 구비된 커버(10)와 상기 하우징 내에서 회전 가능한 구동축(2)과 상기 구동축에 의해 회전되며 소정의 경사각을 갖는 경사판(3)과 상기 경사판에 설치되어 상기 구동축에 의해 회전되는 실린더블록(6)과 상기 실린더블록 내에 형성된 적어도 하나 이상의 중공 피스톤(5)을 구비함에 따라 상기 구동축 회전시 상기 피스톤이 복동되면서 흡입행정과 토출행정을 교호적으로 수행하는 유압 피스톤 펌프의 중공 피스톤(5)의 내측 일부분에 둥근 형태의 구형 피스톤단부(7)로 구성된다.As shown in Figures 2 and 3, the hydraulic piston pump according to the present invention has a housing (1) with a bearing inserted therein, a cover (10) provided with a suction port (12) and a discharge port (11) and in the housing. At least one hollow formed in the cylinder block and the cylinder block (6) rotated by the drive shaft and the inclined plate (3) having a predetermined inclination angle and is installed on the inclined plate and rotated by the drive shaft The
즉, 본 발명의 유체 피스톤 펌프는 저압 저속시에는 실린더블록(6)과 피스톤 (5) 사이에 틈새가 충분하여 원활한 조립과 스틱슬립에 의한 마찰을 최소화할 수 있고 고압시 피스톤단부(7)의 탄성변형에 의한 상기 실린더블록과 상기 피스톤 사이의 틈새가 좁아지도록 하는 것이다.That is, the fluid piston pump of the present invention has a sufficient gap between the
또한, 실린더 블록과 피스톤과의 마찰을 줄이기 위해서 실린더블록 내면에 부시(8)를 더 구비한다.In addition, a
좀더 구체적으로 설명하면, 도 4 내지 도7에 도시된 바와 같이 종래의 피스톤(5)은 일정한 두께를 갖는 중공 피스톤(5)으로 고압이 발생하여도 지름방향으로 변형이 일어나지 않으므로 최초에 설계된 실린더블록(6)과 피스톤(5) 사이의 틈새를 유지하게 된다. 최초 설계시 넓은 틈새를 두게 되면 조립이 용이하며 저속 저압시 스틱슬립에 의한 마찰을 최소화 할 수 있으며 고압시에도 마찰이 적어 기계효율은 좋으나 틈새의 3승에 비례하는 누유량에 따른 용적효율이 나쁘게되어 전체 효율이 나쁘게 된다. 반면 최초 설계시 좁은 틈새를 두면 누유량은 감소하여 용적효율은 좋으나 조립이 어려우며 마찰이 증가하여 기계효율이 떨어져 전체적으로 효율이 나쁘게 된다.More specifically, as shown in FIGS. 4 to 7, the
본 발명에 따른 유체 피스톤 펌프는 피스톤(5)의 끝단으로부터 임의의 지점에 일정한 폭과 반경을 갖는 둥근 형태의 구형 피스톤단부(7)을 두어 고압 발생시에 상기 피스톤단부를 제외한 피스톤은 지름방향의 변형이 없는 반면 상기 피스톤단부에는 지름방향으로 탄성변형이 일어나도록 함으로써 저압 저속시에는 실린더블록(6)과 피스톤(5) 사이에 최초 설계된 충분한 틈새로 인하여 원활한 조립과 스틱슬립에 의한 마찰을 최소화할 수 있도록 하고 고압시에는 피스톤단부(7)의 탄성변형에 의한 상기 실린더블록과 상기 피스톤 사이의 틈새가 좁아지도록 하여 틈새로 인한 누유량을 줄여 기계효율과 용적효율을 증대시킴으로써 유체 피스톤 펌프의 효율을 증대시킬 수 있다.The fluid piston pump according to the present invention has a rounded
또한, 도 7에 도시된 바와 같이 상기 실린더단부의 가공시 일정한 지름을 갖는 구형의 형상을 갖게함으로써 탄성변형시 실린더단부가 구형으로 변형되어 실린더의 전진 및 후진운동에서 실린더블록과 실린더 사이에 일정한 압이 형성되어 윤활특성이 우수하게 되어 마찰이 감소하게 된다. In addition, as shown in FIG. 7, the cylinder end is deformed into a spherical shape during elastic deformation by having a spherical shape having a constant diameter during machining of the cylinder end, so that the pressure between the cylinder block and the cylinder in the forward and backward movements of the cylinder is constant. This is formed so that the lubrication characteristics are excellent, the friction is reduced.
또한, 상기 실린더블록 내면에 마찰 특성이 우수한 황동계열의 부시를 삽입함으로써 마찰력 감소에 따른 기계효율을 증대시킬 수 있어 유체 피스톤 펌프의 효율을 더 증대시킬 수 있다.In addition, by inserting a brass series bush having excellent friction characteristics on the inner surface of the cylinder block can increase the mechanical efficiency according to the frictional force can be further increased the efficiency of the fluid piston pump.
상술한 바와 같이 본 발명에 따른 유체 피스톤 펌프·모터는 중공의 피스톤의 내면에 둥근 형태의 구형 피스톤단부를 만들어 압력에 따른 탄성변형이 일어나도록 하여 상기 피스톤과 실린더블록 사이의 틈새가 압력에 따라 변화되게 함으로써, 저압 저속시에는 실린더블록과 피스톤 사이에 최초의 설계된 충분한 틈새를 두어 원활한 조립과 스틱슬립에 의한 마찰을 최소화할 수 있도록 하고 고압시에는 피스톤단부의 탄성변형에 의한 상기 실린더블록과 상기 피스톤 사이의 틈새가 좁아져 누유량을 저감시켜 저압 저속에서의 원활한 회전 및 기계효율 향상과 고압에서의 용적효율 향상을 통한 고효율을 기대할 수 있는 효과가 있다.As described above, the fluid piston pump and the motor according to the present invention make a spherical piston end of a round shape on the inner surface of the hollow piston so that elastic deformation occurs according to pressure, so that the gap between the piston and the cylinder block changes with pressure. In the low pressure low speed, the cylinder block and the piston are first designed with sufficient clearance to minimize the friction due to smooth assembly and stick slip, and the cylinder block and the piston due to elastic deformation of the piston end at high pressure. The gap between them is narrowed to reduce the amount of oil leakage, and it is effective to expect high efficiency through smooth rotation and mechanical efficiency improvement at low pressure and low speed, and volumetric efficiency at high pressure.
본 발명은 첨부된 도면을 참조하여 바람직한 실시예를 중심으로 기술되었지만 당업자라면 이러한 기재로부터 본 발명의 범주를 벗어남이 없이 많은 다양한 자명한 변형이 가능하다는 것은 명백하다. 따라서 본 발명의 범주는 이러한 많은 변형예를 포함하도록 기술된 특허청구범위에 의해서 해석되어져야 한다.While the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include many such variations.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040090507A KR100598766B1 (en) | 2004-11-08 | 2004-11-08 | Hydraulic Piston Pumps & Motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040090507A KR100598766B1 (en) | 2004-11-08 | 2004-11-08 | Hydraulic Piston Pumps & Motors |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR20-2004-0031560U Division KR200373965Y1 (en) | 2004-11-08 | 2004-11-08 | Hydraulic piston pump and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20060041425A KR20060041425A (en) | 2006-05-12 |
| KR100598766B1 true KR100598766B1 (en) | 2006-07-13 |
Family
ID=37147981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020040090507A Expired - Lifetime KR100598766B1 (en) | 2004-11-08 | 2004-11-08 | Hydraulic Piston Pumps & Motors |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100598766B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101158109B1 (en) * | 2010-03-10 | 2012-06-22 | 한국기계연구원 | Servo motor in oil driven all-in-one shaft type power pack |
| CN105715448A (en) * | 2016-05-04 | 2016-06-29 | 青岛力克川液压机械有限公司 | Oval plunger body structure based on dynamic pressure balance |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102435132B1 (en) | 2020-10-13 | 2022-08-23 | 전인준 | Hydraulic supply device with air emission structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1061551A (en) | 1996-08-21 | 1998-03-03 | Anest Iwata Corp | Piston in oil free reciprocating compressor |
| KR19980068481U (en) * | 1997-05-31 | 1998-12-05 | 토니헬샴 | Hydraulic piston pump / motor with hydraulically actuated piston ring |
| JP2002168172A (en) | 2000-12-01 | 2002-06-14 | Ebara Corp | Axial piston type hydraulic machine |
| KR20040031433A (en) * | 2002-10-07 | 2004-04-13 | 한국기계연구원 | an integrated power generator having an electric motor with an hydraulic pump |
-
2004
- 2004-11-08 KR KR1020040090507A patent/KR100598766B1/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1061551A (en) | 1996-08-21 | 1998-03-03 | Anest Iwata Corp | Piston in oil free reciprocating compressor |
| KR19980068481U (en) * | 1997-05-31 | 1998-12-05 | 토니헬샴 | Hydraulic piston pump / motor with hydraulically actuated piston ring |
| JP2002168172A (en) | 2000-12-01 | 2002-06-14 | Ebara Corp | Axial piston type hydraulic machine |
| KR20040031433A (en) * | 2002-10-07 | 2004-04-13 | 한국기계연구원 | an integrated power generator having an electric motor with an hydraulic pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101158109B1 (en) * | 2010-03-10 | 2012-06-22 | 한국기계연구원 | Servo motor in oil driven all-in-one shaft type power pack |
| CN105715448A (en) * | 2016-05-04 | 2016-06-29 | 青岛力克川液压机械有限公司 | Oval plunger body structure based on dynamic pressure balance |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060041425A (en) | 2006-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3319575A (en) | Piston | |
| EA013630B1 (en) | Vane machine with stationary and rotating cylinder parts | |
| JP5611221B2 (en) | Sliding vane pump | |
| US4673337A (en) | Hydraulic radial piston pump intake porting arrangement | |
| JP2003113776A (en) | Variable capacity swash plate type axial piston unit | |
| JPH01253584A (en) | Rotary waveform motion type air compressor | |
| KR100598766B1 (en) | Hydraulic Piston Pumps & Motors | |
| US6135742A (en) | Eccentric-type vane pump | |
| KR100552597B1 (en) | Rotary displacement pump | |
| KR200373965Y1 (en) | Hydraulic piston pump and motor | |
| KR100962750B1 (en) | Rotary piston machine | |
| US4392795A (en) | Wear resistant rotor slots for vane-type pumps or motors | |
| CN117052653A (en) | Rotor blade assembly and vane pump using same | |
| KR100598767B1 (en) | Cylinder block with static pressure bearing of hydraulic piston pump and motor | |
| CN211598917U (en) | Rotary flow distribution motor | |
| JP4115401B2 (en) | Swash plate type fluid pressure equipment | |
| CN117662460A (en) | Compression mechanism and rotary refrigerant pump | |
| KR200375110Y1 (en) | Cylinder block with hydrostatic bearing of hydraulic piston pump·motor | |
| KR101451660B1 (en) | Friction reduce device for hermetic compressor | |
| KR100674656B1 (en) | Slope plate structure of hydraulic pump | |
| CN1683789A (en) | Double acting radial piston pump | |
| CN111120238A (en) | Floating transmission mechanism and micropump | |
| CN220285955U (en) | Plunger pump | |
| CN222558766U (en) | Compressor cylinder and rotor compressor | |
| JP7186606B2 (en) | Swash plate hydraulic rotary machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 20041108 |
|
| PA0201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 20060327 Patent event code: PE09021S01D |
|
| PG1501 | Laying open of application | ||
| E701 | Decision to grant or registration of patent right | ||
| PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 20060616 |
|
| GRNT | Written decision to grant | ||
| PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 20060703 Patent event code: PR07011E01D |
|
| PR1002 | Payment of registration fee |
Payment date: 20060704 End annual number: 3 Start annual number: 1 |
|
| PG1601 | Publication of registration | ||
| PR1001 | Payment of annual fee |
Payment date: 20090626 Start annual number: 4 End annual number: 4 |
|
| PR1001 | Payment of annual fee |
Payment date: 20100413 Start annual number: 5 End annual number: 5 |
|
| PR1001 | Payment of annual fee |
Payment date: 20110418 Start annual number: 6 End annual number: 6 |
|
| PR1001 | Payment of annual fee |
Payment date: 20120604 Start annual number: 7 End annual number: 7 |
|
| FPAY | Annual fee payment |
Payment date: 20130430 Year of fee payment: 8 |
|
| PR1001 | Payment of annual fee |
Payment date: 20130430 Start annual number: 8 End annual number: 8 |
|
| FPAY | Annual fee payment |
Payment date: 20140602 Year of fee payment: 9 |
|
| PR1001 | Payment of annual fee |
Payment date: 20140602 Start annual number: 9 End annual number: 9 |
|
| FPAY | Annual fee payment |
Payment date: 20150608 Year of fee payment: 10 |
|
| PR1001 | Payment of annual fee |
Payment date: 20150608 Start annual number: 10 End annual number: 10 |
|
| FPAY | Annual fee payment |
Payment date: 20160513 Year of fee payment: 11 |
|
| PR1001 | Payment of annual fee |
Payment date: 20160513 Start annual number: 11 End annual number: 11 |
|
| FPAY | Annual fee payment |
Payment date: 20170512 Year of fee payment: 12 |
|
| PR1001 | Payment of annual fee |
Payment date: 20170512 Start annual number: 12 End annual number: 12 |
|
| FPAY | Annual fee payment |
Payment date: 20180504 Year of fee payment: 13 |
|
| PR1001 | Payment of annual fee |
Payment date: 20180504 Start annual number: 13 End annual number: 13 |
|
| FPAY | Annual fee payment |
Payment date: 20190703 Year of fee payment: 14 |
|
| PR1001 | Payment of annual fee |
Payment date: 20190703 Start annual number: 14 End annual number: 14 |
|
| PR1001 | Payment of annual fee |
Payment date: 20210428 Start annual number: 16 End annual number: 16 |
|
| PR1001 | Payment of annual fee |
Payment date: 20220504 Start annual number: 17 End annual number: 17 |
|
| PR1001 | Payment of annual fee |
Payment date: 20230508 Start annual number: 18 End annual number: 18 |
|
| PR1001 | Payment of annual fee |
Payment date: 20240626 Start annual number: 19 End annual number: 19 |
|
| PC1801 | Expiration of term |
Termination date: 20250508 Termination category: Expiration of duration |