KR20030084202A - Energy regenerative system for hydraulic circuit - Google Patents
Energy regenerative system for hydraulic circuit Download PDFInfo
- Publication number
- KR20030084202A KR20030084202A KR1020020022774A KR20020022774A KR20030084202A KR 20030084202 A KR20030084202 A KR 20030084202A KR 1020020022774 A KR1020020022774 A KR 1020020022774A KR 20020022774 A KR20020022774 A KR 20020022774A KR 20030084202 A KR20030084202 A KR 20030084202A
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- South Korea
- Prior art keywords
- accumulator
- hydraulic oil
- power source
- cylinder
- hydraulic
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
본 발명은 축압기를 이용한 유압장치의 재생시스템에 관한 것으로서, 보다 상세하게는 부하상승시의 위치에너지를 회수하기 위해 축압기를 이용한 에너지 재생시스템에 관한 것이다.The present invention relates to a regeneration system of a hydraulic apparatus using an accumulator, and more particularly, to an energy regeneration system using an accumulator to recover the potential energy at the time of load rise.
본 발명에 따른 유압장치의 에너지 재생시스템은 동력원에 연결되고 상기 동력원의 구동력을 전달받아 작동유를 가압하는 펌프와 상기 펌프에서 실린더로 출력되는 상기 작동유의 방향을 조절하는 방향제어밸브수단과 상기 작동유를 저장하는 액체저장수단내에 위치하고 상기 실린더의 다른 일단에 연결되어 작동유의 압력을 저장하는 축압기와 상기 축압기의 하류에 설치되어 작동유의 흐름을 제한하는 방향제한수단으로 구성된다.The energy regeneration system of the hydraulic device according to the present invention is connected to a power source and receives a driving force of the power source pump and pressurized the hydraulic oil and the direction control valve means for adjusting the direction of the hydraulic oil output from the pump to the cylinder and the hydraulic oil It consists of an accumulator positioned in the liquid storage means for storing and connected to the other end of the cylinder to store the pressure of the hydraulic oil and installed downstream of the accumulator to limit the flow of the hydraulic oil.
본 발명은 축압기의 장착을 용이하게 하고 작동유의 누설등으로 인한 위험을 제거하여 안전성을 높임으로 대형, 고압의 축압기가 실제 장비에 적용가능하게 되어 실용화를 용이하게 할 수 있다.The present invention facilitates the installation of the accumulator and by eliminating the risk due to leakage of the working oil to increase the safety can be applied to the actual equipment large, high pressure accumulator can facilitate the practical use.
Description
본 발명은 축압기를 이용한 유압장치의 재생시스템에 관한 것으로서, 보다 상세하게는 부하상승시의 위치에너지를 회수하기 위해 축압기를 이용한 에너지 재생시스템에 관한 것이다.The present invention relates to a regeneration system of a hydraulic apparatus using an accumulator, and more particularly, to an energy regeneration system using an accumulator to recover the potential energy at the time of load rise.
굴삭기를 포함하는 유압 시스템은 펌프에서 토출된 유압 에너지를 토양을 굴삭하거나 이동시키는데 사용한다. 상차 작업과 같이 토양의 위치를 상승시키는 운동에 이용할 경우, 작업장치와 이동되는 토양의 무게에 대한 중력과 상승 높이로 계산되는 위치 에너지가 증가한다. 증가한 위치 에너지를 갖는 상태에서 굴삭 작업을 위해 버켓을 원래의 위치로 이동하는 복귀 작업시에는 상승한 위치에너지는 하강시의 운동 에너지로 변환할 수 있다.Hydraulic systems, including excavators, use hydraulic energy discharged from a pump to excavate or move soil. When used in a movement to elevate the position of the soil, such as on a loading operation, the potential energy calculated by the gravity and lift height relative to the weight of the work tool and the soil being moved increases. In the return operation of moving the bucket to the original position for the excavation operation with the increased potential energy, the elevated potential energy can be converted into the kinetic energy during the descending operation.
상기 버켓의 하강시 적절한 속도 조절을 위해서 배압측 실린더에 오리피스를 설치하게 되고, 이때 위치에너지에서 변환되는 운동에너지는 열에너지로 소실되므로 이를 방지하기 위하여 하강시의 배압측의 압력 에너지를 축압기로 저장하는 기술이 공지되었다.When the bucket is lowered, an orifice is installed in the back pressure cylinder for proper speed control. At this time, the kinetic energy converted from the potential energy is lost as heat energy. The technique to make is known.
또한, 선회 운동시의 증가한 속도 에너지를 감속시 브레이킹 에너지로 소실 시키지 않고 축압기에 저장하는 기술도 공지되었다.In addition, a technique is known in which the increased speed energy at the time of swinging movement is stored in the accumulator without being lost to the braking energy at the time of deceleration.
그러나 종래의 기술에 의해 축압기를 실제 장비에 적용하는 데 있어서, 적절한 대형의 축압기를 설치하기 위한 공간의 확보가 어렵고 고압의 축압기에서 작동유가 누출시 안전성의 문제가 있었다.However, in applying the accumulator to the actual equipment by the conventional technology, it is difficult to secure a space for installing a suitable large accumulator and there is a problem of safety when the hydraulic oil leaks from the high pressure accumulator.
본 발명은 위와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 작동유의 액체저장탱크 내부에 축압기를 설치하여 장착성과 안전성을 높인 유압회로의 에너지 재생시스템을 제공하는 것이다.The present invention has been made to solve the above problems, an object of the present invention is to provide an energy regeneration system of the hydraulic circuit by installing the accumulator in the liquid storage tank of the hydraulic fluid to improve the mounting and safety.
제 1도는 본 발명에 따른 일 실시예로 액체저장탱크안에 축압기가 설치된 유압회로1 is a hydraulic circuit in which an accumulator is installed in a liquid storage tank according to an embodiment of the present invention.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
1:펌프 2:방향제어밸브1: pump 2: directional control valve
3:실린더 4:가변 펌프-모터3: Cylinder 4: Variable Pump Motor
5:축압기 6:액체저장탱크5: accumulator 6: liquid storage tank
7:체크밸브 8:동력원7: Check valve 8: Power source
본 발명에 따른 유압장치의 에너지 재생시스템은 동력원에 연결되고 상기 동력원의 구동력을 전달받아 작동유를 가압하는 펌프와 상기 펌프에서 실린더로 출력되는 상기 작동유의 방향을 조절하는 방향제어밸브수단과 상기 작동유를 저장하는 액체저장수단내에 위치하고 상기 실린더의 다른 일단에 연결되어 작동유의 압력을 저장하는 축압기와 상기 축압기의 하류에 설치되어 작동유의 흐름을 제한하는 방향제한수단으로 구성된다.The energy regeneration system of the hydraulic device according to the present invention is connected to a power source and receives a driving force of the power source pump and pressurized the hydraulic oil and the direction control valve means for adjusting the direction of the hydraulic oil output from the pump to the cylinder and the hydraulic oil It consists of an accumulator positioned in the liquid storage means for storing and connected to the other end of the cylinder to store the pressure of the hydraulic oil and installed downstream of the accumulator to limit the flow of the hydraulic oil.
또한 상기 에너지 재생시스템에서, 상기 방향제한수단으로 체크밸브가 쓰여질 수 있으며, 상기 실린더와 상기 축압기 사이에 위치하고, 상기 동력원에 연결되어 상기 동력원의 구동력으로 상기 작동유를 가압하거나 상기 작동유의 유압으로 상기 동력원을 구동시키는 가변 펌프-모터수단이 더 포함되어, 축압기에 저장된 에너지가 실린더를 구동하는데 필요한 양보다 더 작으면 동력원으로부터 회전력을 보조받아 실린더를 구동하고, 축압기에 저장된 에너지가 실린더를 구동하는데 필요한 양보다 더 크면 축압기에서 토출된 에너지가 상기 가변 펌프-모터수단을 통하여 상기 동력원을 구동함으로써 에너지를 재생하게 된다.Also in the energy regeneration system, a check valve may be used as the direction limiting means, located between the cylinder and the accumulator, connected to the power source to pressurize the hydraulic fluid with the driving force of the power source or to provide hydraulic pressure of the hydraulic fluid. A variable pump-motor means for driving the power source is further included, where the energy stored in the accumulator is less than the amount required to drive the cylinder, and is driven by the rotational force from the power source, and the energy stored in the accumulator drives the cylinder. If it is larger than necessary, the energy discharged from the accumulator regenerates energy by driving the power source through the variable pump-motor means.
이하 본 발명을 첨부된 도면에 도시된 일 실시예를 참고로 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.
도 1은 본 발명에 따른 유압장치의 에너지 재생시스템이 도시되어 있다.1 shows an energy regeneration system of a hydraulic apparatus according to the present invention.
도면을 참조하면, 본 발명의 에너지 재생시스템은 동력원(8)과 이에 연결되고 작동유를 가압하는 펌프(1)와, 상기 작동유의 방향을 조절하는 방향제어밸브 (2)와 부하를 구동하는 실린더(3)와, 작동유를 가압하거나 상기 동력원(8)을 구동시키는 가변 펌프-모터수단(4)와, 액체저장수단(6)내에 위치하고 상기 실린더의 다른 일단에 연결되어 작동유의 압력을 저장하는 축압기(5)와, 상기 축압기의 하류에 설치되어 작동유의 흐름을 일방향으로 제한하는 체크밸브(7)를 구비한다.Referring to the drawings, the energy regeneration system of the present invention includes a power source 8, a pump 1 connected to the pump 1 for pressurizing hydraulic oil, a direction control valve 2 for adjusting the direction of the hydraulic oil and a cylinder for driving a load ( 3) a variable pump-motor means 4 for pressurizing hydraulic oil or driving the power source 8, and an accumulator positioned in the liquid storage means 6 and connected to the other end of the cylinder to store the pressure of the hydraulic oil. (5) and a check valve (7) provided downstream of the accumulator to restrict the flow of hydraulic oil in one direction.
유압회로가 초기화되어 실린더의 부하를 상승시킬때는 펌프를 통해 가압된 작동유가 방향제어밸브(2)를 통해 방향이 절환되어 체크밸브(7)를 통과하여 실린더의 큰 면적부(3b)로 입력됨으로써 피스톤로드에 연결된 부하를 상승시키게 된다.When the hydraulic circuit is initialized to increase the load of the cylinder, the hydraulic oil pressurized by the pump is switched in direction through the direction control valve (2), passes through the check valve (7), and enters the large area portion (3b) of the cylinder. This will raise the load connected to the piston rod.
상승된 부하는 무게와 높이에 비례하는 위치에너지를 가지고 있으며 이는 상기 실린더의 큰 면적부내의 작동유의 압력으로 변환된다.The elevated load has a potential energy that is proportional to the weight and height, which translates into the pressure of the hydraulic oil in the large area portion of the cylinder.
부하가 하강시 상기 큰 면적부내(3b)의 작동유는 체크밸브(7)에 의해 방향제어밸브(2)로 이동할 수 없고, 동력원(8)에 직결된 가변 펌프-모터(4)에 의해 축압기(5)에 저장된다. 이때 실린더(3)의 하강속도는 운전자의 조작레버의 양에 따라 가변 펌프-모터(4)의 사판각을 조절하여 제어한다.When the load falls, the hydraulic fluid in the large area portion 3b cannot move to the direction control valve 2 by the check valve 7, and is accumulator by the variable pump-motor 4 directly connected to the power source 8. Stored in (5). At this time, the lowering speed of the cylinder 3 is controlled by adjusting the swash plate angle of the variable pump motor 4 in accordance with the amount of the operating lever of the driver.
부하가 상승시에는 축압기(5)에 저장된 작업유가 실린더의 큰 면적부(3b)로 공급된다. 이때 축압기(5)에서 토출된 에너지의 크기가 부하 상승에 필요한 에너지보다 큰 경우 가변 펌프-모터(4)에서 동력원(8)의 회전력을 보조하고, 축압기(5)에서 토출된 에너지의 크기가 부하의 상승에 필요한 에너지보다 작은 경우에는 동력원으로부터 회전력을 보조받아 실린더 큰 면적부(3b)로 공급된다.When the load rises, the working oil stored in the accumulator 5 is supplied to the large area portion 3b of the cylinder. At this time, if the magnitude of the energy discharged from the accumulator 5 is larger than the energy required to increase the load, the variable pump-motor 4 assists the rotational force of the power source 8 and the magnitude of the energy discharged from the accumulator 5. If is smaller than the energy required to increase the load is supplied to the large area portion 3b of the cylinder by receiving the rotational force from the power source.
축압기의 유량이 실린더에서 필요한 유량보다 작게되면 방향제어밸브(2)와 축압기(5)를 거쳐 작동유가 공급된다.When the flow rate of the accumulator is smaller than the flow rate required by the cylinder, the hydraulic oil is supplied through the direction control valve 2 and the accumulator 5.
본 발명은 이러한 에너지 재생장치에 있어서 축압기의 장착 위치를 작동유의 탱크 내부에 설치한 것을 특징으로 하며, 에너지이용 효율을 높이는 이외에 축압기의 장착을 용이하게 하고 작동유의 누설등으로 인한 위험을 제거하여 안전성을 높였다. 따라서 본 발명은 대형, 고압의 축압기가 실제 장비에 적용가능하게 함으로써 재생시스템의 실용화를 용이하게 한다.The present invention is characterized in that the mounting position of the accumulator in the energy regeneration device is installed in the tank of the hydraulic oil, and in addition to improving the energy use efficiency, it is easy to install the accumulator and eliminates the risk of leakage of the hydraulic oil. To increase safety. Therefore, the present invention facilitates the practical use of the regeneration system by making a large, high pressure accumulator applicable to practical equipment.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020020022774A KR100641388B1 (en) | 2002-04-25 | 2002-04-25 | Energy regenerative system for hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020020022774A KR100641388B1 (en) | 2002-04-25 | 2002-04-25 | Energy regenerative system for hydraulic circuit |
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| Publication Number | Publication Date |
|---|---|
| KR20030084202A true KR20030084202A (en) | 2003-11-01 |
| KR100641388B1 KR100641388B1 (en) | 2006-10-31 |
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| KR1020020022774A KR100641388B1 (en) | 2002-04-25 | 2002-04-25 | Energy regenerative system for hydraulic circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105008728A (en) * | 2013-02-19 | 2015-10-28 | 卡特彼勒公司 | Energy recovery system for hydraulic machine |
| CN108466983A (en) * | 2018-06-05 | 2018-08-31 | 安徽合力股份有限公司 | It is a kind of to decline the recyclable forklift hydraulic system of energy |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9279236B2 (en) * | 2012-06-04 | 2016-03-08 | Caterpillar Inc. | Electro-hydraulic system for recovering and reusing potential energy |
| US9290912B2 (en) | 2012-10-31 | 2016-03-22 | Caterpillar Inc. | Energy recovery system having integrated boom/swing circuits |
-
2002
- 2002-04-25 KR KR1020020022774A patent/KR100641388B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105008728A (en) * | 2013-02-19 | 2015-10-28 | 卡特彼勒公司 | Energy recovery system for hydraulic machine |
| CN108466983A (en) * | 2018-06-05 | 2018-08-31 | 安徽合力股份有限公司 | It is a kind of to decline the recyclable forklift hydraulic system of energy |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100641388B1 (en) | 2006-10-31 |
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