KR0157275B1 - Swing energy accumulation device for excavator - Google Patents
Swing energy accumulation device for excavatorInfo
- Publication number
- KR0157275B1 KR0157275B1 KR1019950034478A KR19950034478A KR0157275B1 KR 0157275 B1 KR0157275 B1 KR 0157275B1 KR 1019950034478 A KR1019950034478 A KR 1019950034478A KR 19950034478 A KR19950034478 A KR 19950034478A KR 0157275 B1 KR0157275 B1 KR 0157275B1
- Authority
- KR
- South Korea
- Prior art keywords
- valve
- accumulator
- turning
- excavator
- pump
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
- E02F9/12—Slewing or traversing gears
- E02F9/121—Turntables, i.e. structure rotatable about 360°
- E02F9/123—Drives or control devices specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2285—Pilot-operated systems
Abstract
본 발명은 굴삭기의 상부 선회체가 회전될때 발생되는 선회에너지를 축적하기 위한 장치에 관한 것으로, 종래 선회모터에 의한 굴삭기는 상부 선회체가 기동 및 정지에서 에너지가 대량으로 소모되어 열이나 소음으로 방출되서 효율이 현저히 저하되었다. 즉, 상부 선회체는 펌프에 의해 회전되는 선회모터에 의해 구동되므로 기동에는 선회저항이 크게되어 펌프의 토출 압력이 대량으로 릴리프 밸브를 통해서 리턴되며 정지시에는 상부 선회체의 관성에 의한 선회에 의해 선회모터는 펌프작용을 하게 되는 문제점이 있었으나, 본 발명에서는 기동 및 정지시의 압유를 어큐물레이터에 축압시켜 필요시에는 상기 어큐물레이터와 다른 액츄에이터 사이에 연결된 파이롯트 밸브를 조작하여 축압된 어큐물레이터의 압유만에 의해서도 다른 액츄에이터 등을 이용할 수 있도록 하여 선회에너지를 재이용하고 부드러운 기동 및 정지시의 쇼크감소가 이루어지도록 하였다.The present invention relates to an apparatus for accumulating turning energy generated when an upper swinging body of an excavator is rotated, and an excavator by a conventional swinging motor is efficiently discharged as heat or noise due to a large amount of energy being consumed in starting and stopping the upper rotating body. This was significantly lowered. That is, since the upper swinging body is driven by the swinging motor rotated by the pump, the turning resistance becomes large at the start, and the discharge pressure of the pump is returned through the relief valve in a large amount, and when it is stopped by the turning by the inertia of the upper swinging body The swing motor has a problem in that the pump acts, but in the present invention, the accumulator accumulates pressure in the accumulators at start and stop, and if necessary, operates a pilot valve connected between the accumulator and the other actuators. Other actuators and the like can be used only by the oil pressure of the radar, so that the turning energy is reused and the shock is reduced at the start and stop.
Description
제1도는 본 발명에 의한 선회에너지 축적장치가 구비된 선회모터에 대한 유압회로도.1 is a hydraulic circuit diagram of a swing motor provided with a swing energy storage device according to the present invention.
제2도는 종래 기술에 의한 선회모터의 유압회로도이다.2 is a hydraulic circuit diagram of a swing motor according to the prior art.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 펌프 2 : 공급라인1: Pump 2: Supply Line
3 : 액츄에이터 조작밸트 4 : 선회모터 조작밸브3: Actuator operating belt 4: Slewing motor operating valve
5 : 선회모터 6 : 셔틀밸브5: Swing motor 6: Shuttle valve
7 : 어큐물레이터 8 : 파일롯트 밸브7: Accumulator 8: Pilot Valve
9 : 체크밸브 10 : 릴리프밸브9: check valve 10: relief valve
본 발명은 굴삭기의 상부 선회체가 회전될때 발생되는 선회에너지를 축적하기 위한 장치에 관한 것으로, 특히 상부 선회체의 기동 및 정지시 공급라인 내부의 압유를 어큐물레이터에서 축압되도록 하여 필요시에는 상기 어큐물레이터와 다른 액튜에이터 사이에 연결된 파일롯트 밸브를 조작해서 축압된 어큐물레이터의 압유만에 의해서도 다른 액츄에이터를 작용할 수 있게 되는 굴삭기의 선회에너지 축적장치에 관한 것이다.The present invention relates to a device for accumulating the turning energy generated when the upper swing of the excavator is rotated, in particular the pressure oil inside the supply line during the start and stop of the upper swing to accumulate in the accumulator, if necessary The present invention relates to an excavator's turning energy accumulator which can operate another actuator only by the pressure oil of the accumulator accumulating by operating a pilot valve connected between the cumulator and the other actuator.
종래 선회모터에 의한 굴삭기는 상부 선회체가 기동 및 정지에서 에너지가 대량으로 소모되어 열이나 소음으로 방출되서 효율이 현저히 저하되었다. 즉, 상부 선회체는 펌프에 의해 회전되는 선회모터에 의해 구동되므로 기동에는 선회저항이 크게되어 펌프의 토출 압력이 대량으로 릴리프 밸브를 통해서 리턴되며 정지시에는 상부 선회체의 관성에 의한 선회에 의해 선회모터는 펌프작용을 하게되는 문제점이 있었다.Excavator using a conventional swing motor has a large amount of energy consumed at the start and stop of the upper swing structure and is released as heat or noise, resulting in a significant decrease in efficiency. That is, since the upper swinging body is driven by the swinging motor rotated by the pump, the turning resistance becomes large at the start, and the discharge pressure of the pump is returned through the relief valve in a large amount, and when it is stopped by the turning by the inertia of the upper swinging body The swing motor had a problem that the pump acts.
본 발명은 상기와 같은 문제점을 해결하기 위해 기동 및 정지시의 압유를 어큐물레이터에 축압시켜 필요시에는 상기 어큐물레이터와 다른 액츄에이터 사이에 연결된 파이롯트 밸브를 조작하여 축압된 어큐물레이터의 압유만에 의해서도 다른 액츄에이터 등을 이용할 수 있도록 하여 선회에너지를 재이용하고 부드러운 기동 및 정지시의 쇼크감소가 이루어지도록 하는데에 그 목적이 있는 것이다.The present invention is to accumulate the pressure oil at start and stop to the accumulator in order to solve the above problems, and if necessary, only the pressure accumulator of the accumulator accumulating by operating a pilot valve connected between the accumulator and the other actuator The purpose of this is to allow other actuators to be used, so that the turning energy can be reused and the shock can be reduced smoothly during start and stop.
첨부도면에 의해 본 발명의 내용을 상세히 설명하면 다음과 같다.The content of the present invention by the accompanying drawings in detail as follows.
제1도에서 보면, 펌프(1) 및 액츄에이터 조작밸브(3)와 연결된 선회모터 조작밸브(4)와 선회모터(5) 사이에 병렬로 셔틀밸브(6)가 연결되고, 상기 셔틀밸브(6)의 토출단은 체크밸브(9)를 거쳐 어큐물레이터(7)와 조작단이 액츄에이터 조작밸브(3)의 조작단과 함께 작동토록 연결된 파이롯트 밸브(8)의 유입단에 분기 연결되며, 상기 파이롯트 밸브(8)의 토출단은 상기 액츄에이터 조작밸브(3)의 유입단에 연결된다.In FIG. 1, the shuttle valve 6 is connected in parallel between the swing motor operating valve 4 and the swing motor 5 connected to the pump 1 and the actuator operating valve 3, and the shuttle valve 6 The discharge end of) is branched to the inlet end of the pilot valve 8 which is connected to the accumulator 7 and the operating end together with the operating end of the actuator operating valve 3 via the check valve 9, and the pilot The discharge end of the valve 8 is connected to the inlet end of the actuator operating valve 3.
또한, 상기 선회모터(5) 내부로는 유입되는 압유의 급격한 압력에 의해 선회모터가 손상되지 않도록 하기 위해 릴리프 밸브(10)가 일정한 압력 이상에서 탱크로 압유를 드레인시키도록 연결되어 있다.In addition, the relief valve 10 is connected to drain the hydraulic oil to the tank at a predetermined pressure or higher in order to prevent the swinging motor from being damaged by the sudden pressure of the hydraulic oil flowing into the swinging motor 5.
이상과 같이 구성되는 본 발명 장치의 작용은 다음과 같다.The operation of the apparatus of the present invention configured as described above is as follows.
먼저 액츄에이터 조작밸브(3)를 중심으로 하고 선회모터 조작밸브(4)를 조작하여 선회모터(5) 내에 압유를 공급되도록 하면, 대부분의 압유는 선회모터(5) 내로 공급되어 상부 선회체가 선회되도록 작용하지만, 순간적으로 압력이 급증된 압유의 일부는 셔틀밸브(6)의 일측 유입단을 통해 유입되어 체크밸브(9)를 통해 어큐물레이터(7)에 축적된다.First, when the actuator operating valve (3) is centered and the swing motor operating valve (4) is operated to supply pressure oil into the swing motor (5), most of the pressure oil is supplied into the swing motor (5) so that the upper swing body is pivoted. Although a part of the pressurized oil in which the pressure suddenly increases is introduced through one inlet end of the shuttle valve 6, it accumulates in the accumulator 7 through the check valve 9.
또한, 액츄에이터 조작밸브(3)를 중립으로 하고 선회모터 조작밸브(4)를 조작하여 선회모터(5) 내에 압유공급을 중단할 경우에도 선회모터(5)의 관성력에 의해 선회모터(5)의 토출단측에 압력이 순간적으로 증가되므로 상기 경우와 마찬가지로 어큐물레이터(7)에 압유가 축적되는 것이다.In addition, when the actuator operating valve 3 is set to neutral and the swing motor operating valve 4 is operated to stop the supply of hydraulic oil into the swing motor 5, the turning motor 5 is driven by the inertia force of the swing motor 5. Since the pressure is momentarily increased on the discharge end side, the pressurized oil accumulates in the accumulator 7 as in the above case.
이 상태에서 별도의 조작수단(미도시함)에 의해 액츄에이터 조작밸브(3)의 조작단 및 파이롯트 밸브(8)의 조작단에 통전하여 각각 작동되도록 하면 상기 어큐물레이터(7)의 압유가 파이롯트 밸브(8)를 통해 액츄에이터 조작밸브(3)에 공급되게 되어, 상기 액츄에이터 조작밸브(3)를 통해 다른 액츄에이터에 펌프압과 함께 어큐물레이터(7)의 압유가 공급되므로 어큐물레이터(7)에 축압된 선회모터의 선회에너지를 이용할 수 있게 되는 것이다.In this state, if the operating end of the actuator operating valve 3 and the operating end of the pilot valve 8 are energized and operated by separate operating means (not shown), the hydraulic oil of the accumulator 7 is piloted. It is supplied to the actuator operating valve (3) through the valve (8), the pressure oil of the accumulator (7) together with the pump pressure is supplied to the other actuator through the actuator operating valve (3) accumulator (7) It is possible to use the turning energy of the turning motor accumulated in the motor.
이와 같이 본 발명장치는 선회모터(5)의 기동 및 정지시의 압유를 어큐물레이터(7)에 축압시켜 필요시에는 상기 어큐물레이터(7)와 다른 액츄에이터 사이에 연결된 파이롯트 밸브(8)를 조작하여 축압된 어큐물레이터의 압유만에 의해서도 다른 액츄에이터 등을 이용할 수 있도록 하여 선회에너지를 재이용하고 부드러운 기동 및 정지시의 쇼크 감소가 이루어지도록 한 유용한 발명이다.In this way, the present invention accumulates the pressure oil at the start and stop of the swing motor 5 to the accumulator 7, and if necessary, the pilot valve 8 connected between the accumulator 7 and another actuator is provided. It is a useful invention that other actuators and the like can be used only by the pressure oil of the accumulator that is operated and accumulated, so that the turning energy is reused and the shock is reduced during smooth starting and stopping.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950034478A KR0157275B1 (en) | 1995-10-09 | 1995-10-09 | Swing energy accumulation device for excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950034478A KR0157275B1 (en) | 1995-10-09 | 1995-10-09 | Swing energy accumulation device for excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970021543A KR970021543A (en) | 1997-05-28 |
| KR0157275B1 true KR0157275B1 (en) | 1998-11-16 |
Family
ID=19429575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950034478A KR0157275B1 (en) | 1995-10-09 | 1995-10-09 | Swing energy accumulation device for excavator |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0157275B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013090152A1 (en) * | 2011-12-16 | 2013-06-20 | Caterpillar Inc. | Hydraulic system having energy recovery |
| KR101324894B1 (en) * | 2006-11-20 | 2013-11-04 | 두산인프라코어 주식회사 | Swing device for excavator |
| WO2014123253A1 (en) * | 2013-02-06 | 2014-08-14 | Volvo Construction Equipment Ab | Swing control system for construction machines |
| WO2018194357A1 (en) * | 2017-04-18 | 2018-10-25 | 두산인프라코어 주식회사 | Construction machine |
-
1995
- 1995-10-09 KR KR1019950034478A patent/KR0157275B1/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101324894B1 (en) * | 2006-11-20 | 2013-11-04 | 두산인프라코어 주식회사 | Swing device for excavator |
| WO2013090152A1 (en) * | 2011-12-16 | 2013-06-20 | Caterpillar Inc. | Hydraulic system having energy recovery |
| WO2014123253A1 (en) * | 2013-02-06 | 2014-08-14 | Volvo Construction Equipment Ab | Swing control system for construction machines |
| US9540789B2 (en) | 2013-02-06 | 2017-01-10 | Volvo Construction Equipment Ab | Swing control system for construction machines |
| WO2018194357A1 (en) * | 2017-04-18 | 2018-10-25 | 두산인프라코어 주식회사 | Construction machine |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970021543A (en) | 1997-05-28 |
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