KR100283220B1 - Heavy duty main control valve with pressure loss reduction - Google Patents
Heavy duty main control valve with pressure loss reduction Download PDFInfo
- Publication number
- KR100283220B1 KR100283220B1 KR1019980050824A KR19980050824A KR100283220B1 KR 100283220 B1 KR100283220 B1 KR 100283220B1 KR 1019980050824 A KR1019980050824 A KR 1019980050824A KR 19980050824 A KR19980050824 A KR 19980050824A KR 100283220 B1 KR100283220 B1 KR 100283220B1
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- main control
- control valve
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- 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
- E02F9/2221—Control of flow rate; Load sensing arrangements
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- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
개시된 기술은 굴삭기 등과 같은 건설 장비에 적용되어 부움실린더 등과 같은 유압 엑츄에이터에 유압력 공급시 압력손실을 저감하는 기능을 갖는 메인콘트롤밸브에 관한 것이다.The disclosed technology relates to a main control valve which is applied to construction equipment such as an excavator, and has a function of reducing pressure loss when supplying hydraulic force to a hydraulic actuator such as a boom cylinder.
이 장치는, 유압펌프와 이 유압펌프에 의해 구동되는 유압엑츄에이터 사이에 설치되어 스프울의 이동에 따른 내부 유로의 절환접속에 의해 유압엑츄에이터의 작동을 제어하는 메인콘트롤밸브에 있어서, 내부 유로는 유압펌프와 연결되는 펌프측 유로와, 유압엑츄에이터와 연결되는 공급유로를 구비하고, 펌프측 유로와 공급유로 사이에 트랜지션체크밸브가 설치되며, 펌프측 유로와 공급유로를 트랜지션체크밸브를 거치지 않고 직접 연결하는 보조유로를 구비함으로써, 유압유 공급시 트랜지션체크밸브 통과로 인한 압력손실이 현저히 저감될 수 있다.The apparatus is provided between a hydraulic pump and a hydraulic actuator driven by the hydraulic pump, the main control valve for controlling the operation of the hydraulic actuator by the switching connection of the internal flow path according to the movement of the spring, the internal flow path is hydraulic A pump side flow path connected to the pump and a supply flow path connected to the hydraulic actuator are provided, and a transition check valve is installed between the pump side flow path and the supply flow path, and the pump side flow path and the supply flow path are directly connected without passing through the transition check valve. By providing an auxiliary flow path, the pressure loss due to the passage of the transition check valve during hydraulic oil supply can be significantly reduced.
Description
본 발명은 중장비용 메인콘트롤밸브에 관한 것으로, 특히 굴삭기, 로우더 등과 같은 건설용 중장비에 적용되어 부움실린더 등과 같은 유압 엑츄에이터에 유압력 공급시 압력손실을 저감하는 기능을 갖는 메인콘트롤밸브에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main control valve for heavy equipment, and more particularly, to a main control valve having a function of reducing pressure loss when supplying hydraulic power to a hydraulic actuator such as a boolean cylinder by being applied to construction heavy equipment such as an excavator and a loader.
굴삭기 등과 같은 건설장비의 개략적 구성을 보면, 엔진에 의해 구동되는 유압펌프와, 이 유압펌프의 토출유에 의해 작동되며 장비의 주행, 선회 및 각종 작업장치 구동을 담당하는 유압모터와 유압 실린더 등의 엑츄에이터류 및 유압펌프와 유압 엑츄에이터 사이에 설치되어 유량의 공급과 차단 등을 제어함으로써 유압엑츄에이터의 기동, 정지 및 방향전환 등을 수행하는 콘트롤밸브 등이 구비되어 있다.In the schematic configuration of construction equipment such as an excavator, an hydraulic pump driven by an engine and an actuator such as a hydraulic motor and a hydraulic cylinder which are operated by the discharge oil of the hydraulic pump and are responsible for driving, turning and driving various work devices of the equipment. A control valve is installed between the flow and hydraulic pump and the hydraulic actuator to control the supply and interruption of the flow rate and to start, stop, and change the hydraulic actuator.
한편, 위와 같은 구성 중, 유압펌프로 부터 부움실린더 등과 같은 작업장치용 유압 엑츄에이터에 유량이 전달되는 계통을 자세히 살펴보면, 도 1 에 도시된 바와 같이, 트랜지션체크밸브(101)를 통과한 후, 스프울(102)을 거쳐, 로크밸브(103)을 통과하여 엑츄에이터에 전달되는 경로를 가졌다. 트랜지션체크밸브(101)는 엑츄에이터에 걸리는 부하압이 높을 경우 유량이 유압펌프쪽으로 역류되는 것을 방지하기 위해 설치되었고, 로크밸브(103)는 콘크롤밸브 내부의 스프울 틈새로 누유(Leakage)가 발생함으로써 자연침하를 방지하기 위해 설치되었다.On the other hand, in the configuration as described above, if you look at the system in which the flow rate is transmitted from the hydraulic pump to the hydraulic actuator for the working device, such as a pour cylinder in detail, as shown in Figure 1, after passing the transition check valve 101, It had a path through the wool 102, through the lock valve 103, and delivered to the actuator. The transition check valve 101 is installed to prevent the flow rate from flowing back toward the hydraulic pump when the load pressure applied to the actuator is high, and the lock valve 103 is leaked due to the spacing of the inside of the control valve. It was installed to prevent natural settlement.
따라서, 유압펌프로 부터 유압 엑츄에이터에 유량을 공급하는 경우, 2개의 체크밸브, 즉 트랜지션체크밸브와 로크밸브를 모두 통과해야 하기 때문에, 압력손실이 불가피하다는 문제점이 있었다.Therefore, when the flow rate is supplied from the hydraulic pump to the hydraulic actuator, there is a problem that the pressure loss is inevitable because it must pass through both check valves, that is, the transition check valve and the lock valve.
따라서, 본 발명의 목적은, 굴삭기 등과 같은 건설장비에 적용되어, 유압펌프로 부터 부움실린더 등과 같은 작업장치 구동용 유압 엑츄에이터에 유량 공급시 다수의 체크밸브 통과로 인한 압력손실을 최대한 저감할 수 있는 기능을 갖는 메인콘트롤밸브를 제공하는 데에 있다.Accordingly, an object of the present invention is applied to construction equipment, such as excavators, to reduce the pressure loss due to the passage of a plurality of check valves at the time of supplying the flow rate from the hydraulic pump to the hydraulic actuator for driving the work device such as the pour cylinder, etc. It is to provide a main control valve having a function.
도 1은 종래의 중장비용 메인콘트롤밸브 중 일부 섹션을 도시하는 단면도1 is a cross-sectional view showing some sections of a conventional main control valve for heavy equipment
도 2는 본 발명의 일실시예에 따른 중장비용 메인콘트롤밸브 중 일부 섹션을 도시하는 단면도Figure 2 is a cross-sectional view showing some sections of the main control valve for heavy equipment according to an embodiment of the present invention
〈도면의 주요부분에 대한 부호설명〉<Code Description of Main Parts of Drawing>
P: 유압펌프 BOOM: 부움실린더P: Hydraulic pump BOOM: Boolean cylinder
1: 펌프측 유로 2a, 2b: 공급유로1: pump side flow path 2a, 2b: supply flow path
3a, 3b: 배출유로 4: 트랜지션체크밸브3a, 3b: outlet passage 4: transition check valve
5: 로크밸브 6: 보조유로5: lock valve 6: auxiliary flow path
전술한 목적을 달성하기 위한 본 발명의 메인콘트롤밸브는, 유압펌프와 이 유압펌프에 의해 구동되는 유압엑츄에이터 사이에 설치되어 스프울의 이동에 따른 내부 유로의 절환접속에 의해 상기 유압엑츄에이터의 작동을 제어하는 메인콘트롤밸브에 있어서, 상기 내부 유로는 상기 유압펌프와 연결되는 펌프측 유로와, 상기 유압엑츄에이터와 연결되는 공급유로를 포함하고, 상기 펌프측 유로와 상기 공급유로 사이에 설치된 트랜지션체크밸브와, 상기 펌프측 유로와 상기 공급유로를 상기 트랜지션체크밸브를 거치지 않고 직접 연결하는 보조유로를 구비하여 구성된다.Main control valve of the present invention for achieving the above object is installed between the hydraulic pump and the hydraulic actuator driven by the hydraulic pump to operate the hydraulic actuator by the switching connection of the internal flow path according to the movement of the spring. The main control valve for controlling, wherein the internal flow path includes a pump side flow path connected to the hydraulic pump, and a supply flow path connected to the hydraulic actuator, and a transition check valve installed between the pump side flow path and the supply flow path; And an auxiliary flow path directly connecting the pump side flow path and the supply flow path without passing through the transition check valve.
이하, 첨부 도면을 참조하여 본 발명의 바람직한 실시예에 대해 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 2 는 본 발명의 일실시예에 의한 중장비의 메인콘트롤밸브 구성 중 일부 섹션을 도시하고 있다.Figure 2 shows some sections of the main control valve configuration of the heavy equipment according to an embodiment of the present invention.
도 2 의 섹션은, 중장비의 메인콘트롤밸브(MCV) 구성 중, 펌프(P)로 부터 부움실린더(BOOM)에 공급되는 유량을 제어하기 위한 부움실린더 섹션에 해당된다.The section of FIG. 2 corresponds to a boom cylinder section for controlling the flow rate supplied to the boom cylinder BOOM from the pump P during the construction of the main control valve MCV of the heavy equipment.
도 2 의 섹션 중, 1은 펌프측 유로를 나타내며, 2a, 2b는 부움실린더측으로의 공급유로를 나타낸다. 즉, 2a는 부움실린더의 라지챔버에 유량을 공급하기 위한 유로이고, 2b는 부움실린더의 스몰챔버에 유량을 공급하기 위한 유로이다. 3a, 3b는 부움실린더의 라지챔버와 스몰챔버로 부터 각각 탱크쪽으로 유량을 배출하기 위한 배출유로이다. 펌프측 유로(1)과 공급유로(2a, 2b)사이에는 상술한 바와 같은 트랜지션체크밸브(4)가 설치되어 있고, 공급유로(2a, 2b)와 부움실린더(BOOM)의 라지챔버 사이에는 로크밸브(5)가 설치되어 있다.In the section of FIG. 2, 1 represents a pump side flow path, and 2a and 2b represent a supply flow path to the pour cylinder side. That is, 2a is a flow path for supplying a flow rate to the large chamber of the boom cylinder, and 2b is a flow path for supplying the flow rate to the small chamber of the boom cylinder. 3a and 3b are discharge flow paths for discharging the flow from the large chamber and the small chamber of the boom cylinder to the tank, respectively. The above-described transition check valve 4 is provided between the pump side flow path 1 and the supply flow paths 2a and 2b, and the lock is provided between the supply flow paths 2a and 2b and the large chamber of the boom cylinder BOOM. The valve 5 is provided.
부움업(BOOM-UP)작동을 위해 부움실린더(BOOM)의 라지챔버에 유량이 공급되는 경우, 펌프 토출유량이 트랜지션체크밸브(4)를 개방하고 펌프측 유로(1)와 공급유로(2a)를 통과한 후, 로크밸브(5)를 거쳐 라지챔버에 공급된다.When the flow rate is supplied to the large chamber of the boom cylinder for the boom-up operation, the pump discharge flow rate opens the transition check valve 4 and the pump side flow path 1 and the supply flow path 2a. After passing through, it is supplied to the large chamber via the lock valve (5).
본 실시예의 경우, 공급유로(1)로 부터 트랜지션체크밸브(4)를 통과하지 않고 직접 공급유로(2a)로 연결되는 보조유로(6)를 더 구비하고 있다.In the present embodiment, the auxiliary passage 6 is further provided from the supply passage 1 directly to the supply passage 2a without passing through the transition check valve 4.
본 실시예에 의하면, 부움업(BOOM-UP)작동을 위해 부움실린더(BOOM)의 라지챔버에 유량이 공급되는 경우, 펌프 토출유량이 펌프측 유로(1)와 보조유로(6)를 통해 공급유로(2a)에 공급되고, 그 후, 로크밸브(5)를 거쳐 라지챔버에 공급된다. 따라서, 유량 공급시 트랜지션체크밸브(4)를 통과하지 않게 되므로, 압력손실이 저감되는 효과가 있다.According to this embodiment, when the flow rate is supplied to the large chamber of the boom cylinder (BOOM-UP) for operation, the pump discharge flow rate is supplied through the pump side flow path (1) and the auxiliary flow path (6) It is supplied to the flow path 2a, and is then supplied to the large chamber via the lock valve 5. Therefore, the flow rate supply valve does not pass through the transition check valve 4, thereby reducing the pressure loss.
본 발명에 의하면, 중장비에 있어서, 유압펌프로 부터 작업용 엑츄에이터로의 유량 공급시 트랜지션체크밸브를 통과하지 않고 보조유로를 통해 공급측 유로에 직접 전달됨으로써, 트랜지션체크밸브 통과로 인한 압력손실이 최대한 저감될 수 있다.According to the present invention, in the heavy equipment, when the flow rate is supplied from the hydraulic pump to the working actuator, the pressure loss due to the passage of the transition check valve can be reduced as much as it is directly transmitted to the supply side flow path through the auxiliary flow path without passing through the transition check valve. Can be.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980050824A KR100283220B1 (en) | 1998-11-25 | 1998-11-25 | Heavy duty main control valve with pressure loss reduction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980050824A KR100283220B1 (en) | 1998-11-25 | 1998-11-25 | Heavy duty main control valve with pressure loss reduction |
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| KR20000033802A KR20000033802A (en) | 2000-06-15 |
| KR100283220B1 true KR100283220B1 (en) | 2001-04-02 |
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