KR100435618B1 - Hydraulic intensifier - Google Patents
Hydraulic intensifier Download PDFInfo
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- KR100435618B1 KR100435618B1 KR10-2001-0072549A KR20010072549A KR100435618B1 KR 100435618 B1 KR100435618 B1 KR 100435618B1 KR 20010072549 A KR20010072549 A KR 20010072549A KR 100435618 B1 KR100435618 B1 KR 100435618B1
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- hydraulic
- booster
- hydraulic pressure
- pressure
- valve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/005—Crushing or disintegrating by reciprocating members hydraulically or pneumatically operated
Abstract
본 발명은 유압식 증압장치에 관한 것으로, 더욱 상세하게는 증압피스톤과 스풀의 단면적비(A2/A1)를 충분히 크게 함으로써 증압효율을 향상시킬 수 있고, 단일유압공급구조로 구성되어 공급유압의 관리가 용이한 유압식 증압장치를 제공함에 그 목적이 있다.The present invention relates to a hydraulic pressure booster, and more particularly, by increasing the cross-sectional ratio (A 2 / A 1 ) of the pressure booster piston and the spool sufficiently, the pressure boosting efficiency can be improved, and the single hydraulic pressure supply structure constitutes a supply hydraulic pressure. Its purpose is to provide a hydraulic pressure booster that is easy to manage.
그리고, 상기한 목적을 달성하기 위하여 본 발명은 유압실린더(121)의 전진쳄버(119)에 유압을 증압 공급하여 피스톤(117)을 전진시키면 로드(118)의 작동절단부재(310)가 고정절단부재(320)상의 피작업물(401)을 가압하여 파쇄 또는 절단하게 되는 유압식 증압장치에 있어서, 유압펌프(101)의 유압을 방향절환밸브(102)에서 절환하여 전진관로(103,p1,a) 또는 후진관로(104,p2)를 통해 상기 유압실린더(121)의 전진쳄버(119) 또는 후진쳄버(120)에 공급하도록 설치하되, 상기 유압펌프(101)의 유압이 전진관로(103)를 통해 증압밸브(105)의 절환에 따라 유압관로(p3,p4)로 공급되면 대경쳄버(v1,v2)에 충전되어 증압피스톤(113)을 좌우이동시키면서 체크밸브(112,114)가 설치된 증압관로(q1,q2)를 거쳐 소경쳄버(v3,v4)에 충전되고 스풀(99,98)의 가압작용에 의해 상기 소경쳄버(v3,v4)내의 유압이 증압되어 체크밸브(111,115)가 설치된 증압공급관로(q3,q4)를 통해 증압배출관로(p5)를 거쳐 상기 전진관로(a)로 공급되도록 설치되는 것을 특징으로 하는 유압식 증압장치를 제공하게 된다.In order to achieve the above object, the present invention provides a hydraulic pressure to the forward chamber 119 of the hydraulic cylinder 121 to advance the piston 117 to advance the piston 117, and the cutting member 310 of the rod 118 is fixedly cut. In the hydraulic pressure booster which presses the workpiece 401 on the member 320 and crushes or cuts it, the hydraulic pressure of the hydraulic pump 101 is switched by the direction change valve 102 to advance the forward passages 103, p1, a. Or to the forward chamber 119 or the reverse chamber 120 of the hydraulic cylinder 121 through the reverse pipe path (104, p2), the hydraulic pressure of the hydraulic pump 101 to the forward pipe path (103) When the pressure supply valve 105 is supplied to the hydraulic pipes p3 and p4 according to the switching of the booster valve 105, the booster pipes q1 are provided with large diameter chambers v1 and v2 and the check valves 112 and 114 are installed while moving the booster piston 113 left and right. The small diameter chambers v3 and v4 are filled in the small diameter chambers v3 and v4 by the pressure acting on the spools 99 and 98 via? q2. The booster is provided to provide a hydraulic pressure booster which is installed to be supplied to the forward pipe line (a) through the booster discharge pipe line (p5) through the booster supply line (q3, q4) is installed check valves (111, 115). .
Description
본 발명은 유압식 증압장치에 관한 것으로, 더욱 상세하게는 저압의 유압원으로부터 공급되는 최초압력을 고압의 최종압력으로 증압하여 절단기의 유압실린더에 공급하게 되는 유압식 증압장치에 관한 것이다.The present invention relates to a hydraulic pressure booster, and more particularly, to a hydraulic pressure booster for supplying a hydraulic cylinder of a cutter by increasing the initial pressure supplied from a low pressure hydraulic source to a high pressure final pressure.
일반적으로, 절단기는 건축물의 철거 및 고철분리현장 등에서 철근, 철판, 콘크리트 등을 절단 및 파쇄하는데에 사용되는 장비로서, 유압실린더에 공급되는 유압을 이용하여 절단부재 사이에 놓인 작업물을 파쇄 또는 절단하게 되는 장비이다.In general, the cutting machine is a equipment used to cut and crush reinforcing bars, steel plates, concrete, etc. in the demolition and scrap metal separation site of the building, using the hydraulic pressure supplied to the hydraulic cylinder to crush or cut the work placed between the cutting members It's equipment done.
이때, 종래의 절단기에서는 굴삭기에서 토출하는 유압을 별도의 증압과정없이 그대로 유압실린더에 공급하여 사용하기 때문에 유압실린더에서 큰힘을 발생시키기 위하여 피스톤의 단면적을 크게 하거나 절단부와 링크의 레버비를 크게 하는방법을 사용하고 있다.At this time, in the conventional cutter, since the hydraulic pressure discharged from the excavator is supplied to the hydraulic cylinder as it is, without increasing the pressure increase process, the cross-sectional area of the piston is increased or the lever ratio of the cutting part and the link is increased to generate a large force in the hydraulic cylinder. I'm using
그러나, 이러한 종래의 증압방법은 피스톤의 전후진속도가 저하되고(V=Q/A, V는 피스톤속도, Q는 토출유량, A는 피스톤의 단면적), 절단기의 전체길이가 길어진다는 문제가 있다.However, this conventional boosting method has a problem that the forward and backward speed of the piston is lowered (V = Q / A, V is the piston speed, Q is the discharge flow rate, A is the cross-sectional area of the piston), and the overall length of the cutter is long. .
한편, 프레스나 자동화라인 등에서 널리 사용되고 있는 종래의 유압식 증압장치에 있어 도1a에 도시한 바와 같이 1차압력오일이 공급포트(30)로 공급되면 증압피스톤(40)의 작동유로(35)를 통해 좌측대유압실(20)을 충전하게 된다.On the other hand, in the conventional hydraulic pressure booster which is widely used in a press or an automation line, as shown in Figure 1a when the primary pressure oil is supplied to the supply port 30 through the operating flow path 35 of the boost piston (40) The left large hydraulic chamber 20 is charged.
그리고, 증압피스톤(40)과 우측고압플런저(22)가 우측으로 이동되면서 우측1차측포트(33)로 공급되는 유압을 가압하여 우측2차측포트(34)로 증압 공급하게 된다.Then, the pressure increasing piston 40 and the right high pressure plunger 22 are moved to the right to pressurize the hydraulic pressure supplied to the right primary port 33 to supply the pressure to the right secondary port 34.
또한, 도1b에 도시한 바와 같이 1차압력오일이 공급포트(30)로 공급되면서 증압피스톤(40)의 작동유로(35)를 통해 우측대유압실(20)을 충전하게 되면 증압피스톤(40)과 좌측고압플런저(22)가 좌측으로 이동되면서 좌측1차측포트(33)로 공급되는 유압을 가압하여 좌측2차측포트(34)로 증압 공급하게 된다.In addition, as shown in FIG. 1B, when the primary pressure oil is supplied to the supply port 30, the right pressure hydraulic chamber 20 is charged through the operating flow path 35 of the boost piston 40. ) And the left high pressure plunger 22 are moved to the left to pressurize the hydraulic pressure supplied to the left primary port 33 and supply the pressure to the left secondary port 34.
이처럼 파이럿밸브(50)의 연속절환작용에 따라 증압피스톤(40)이 좌우왕복운동을 하면서 1차측포트(33)로 공급되는 유압을 연속적으로 증압시켜 2차측포트(34)로 출력함으로써 저압의 1차공급유압을 고압의 2차공급유압으로 증압할 수 있게 된다.As such, the boosting piston 40 continuously increases and decreases the hydraulic pressure supplied to the primary side port 33 while outputting the secondary side port 34 while reciprocating the left and right according to the continuous switching action of the pilot valve 50. The secondary supply hydraulic pressure can be increased to the secondary supply hydraulic pressure of high pressure.
그러나, 상기한 종래의 유압식 증압장치는 증압피스톤(40)의 단면적(A1)에 비해 고압플런저(22)의 단면적(A2)이 매우 작게 형성되어 증압효율이 떨어지는 문제가 있다.However, the aforementioned conventional hydraulic booster device has a problem in cross-sectional area (A 2) is formed in a very small pressure increase poor efficiency of the high-pressure plunger 22 relative to the cross-sectional area (A 1) of the booster piston (40).
또한, 종래의 유압식 증압장치는 공급포트(30)를 통해 공급되는 작동유압으로 증압피스톤(40)을 이동시키면서 파이럿밸브(50)를 절환하도록 작동시키고, 증압할 1차유압을 1차측포트(33)로 별도 공급하는 이중유압공급구조로 되어 있어 공급유압의 관리가 어려운 문제가 있다.In addition, the conventional hydraulic pressure booster operates to switch the pilot valve 50 while moving the boosting piston 40 to the operating pressure supplied through the supply port 30, and the primary side pressure 33 to increase the primary hydraulic pressure to be boosted. There is a problem that it is difficult to manage the supply hydraulic pressure because of the dual hydraulic supply structure to supply separately.
더욱이, 종래의 유압식 증압장치에는 2차측포트(34)를 통해 유압구동장치에 공급된 유압을 드레인할 수 없는 구조로 되어 있어 별도의 유압드레인장치를 설치하여야 하는 등 자칫 복잡한 구조를 가질 수 있는 문제가 있다.In addition, the conventional hydraulic pressure booster has a structure that cannot drain the hydraulic pressure supplied to the hydraulic drive through the secondary side port 34, so that a complicated hydraulic structure such as a separate hydraulic drain device must be installed. There is.
본 발명은 이처럼 종래 유압식 증압장치의 문제를 개선하기 위하여 안출된 것으로, 증압피스톤과 스풀의 단면적비(A2/A1)를 충분히 크게 함으로써 증압효율을 향상시킬 수 있고, 단일유압공급구조로 구성되어 공급유압의 관리가 용이한 유압식 증압장치를 제공함에 그 목적이 있다.The present invention has been devised to improve the problems of the conventional hydraulic pressure booster, and the pressure increase efficiency can be improved by sufficiently increasing the cross-sectional ratio (A 2 / A 1 ) of the pressure increase piston and the spool, and constitute a single hydraulic supply structure. The purpose is to provide a hydraulic pressure booster that is easy to manage the supply hydraulic pressure.
도1a 및 도1b는 종래의 유압식 증압장치를 나타내는 단면도,1A and 1B are cross-sectional views showing a conventional hydraulic pressure booster;
도2는 본 발명에 따른 유압식 증압장치가 장착된 절단기용 유압시스템을 나타내는 구성도,2 is a block diagram showing a hydraulic system for a cutting machine equipped with a hydraulic pressure booster according to the present invention;
도3 및 도4는 본 발명에 따른 유압식 증압장치의 작동상태를 나타내는 상태도이다.3 and 4 is a state diagram showing an operating state of the hydraulic pressure booster according to the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
20: 대유압실 21: 소유압실 22: 고압플런저 30: 공급포트 31: 제1귀환포트 32: 제2귀환포트 33: 1차측포트 34: 2차측포트 40: 증압피스톤 50: 파이럿밸브 101: 유압펌프 102: 방향제어밸브 103: 제1전진관로 104: 제1후진관로 105: 증압밸브 107: 체크밸브 109: 시퀀스밸브 110: 파이럿밸브 111,112,114,115: 체크밸브 113: 증압피스톤 116: 드레인체크밸브 117: 피스톤 118: 로드 119: 전진쳄버 120: 후진쳄버 121: 유압실린더 131: 증압하우징 132: 좌측실린더 133: 우측실린더 300: 절단베이스 310: 작동절단부재 320: 고정절단부재 401: 피작업물20: Large hydraulic chamber 21: Low pressure chamber 22: High pressure plunger 30: Supply port 31: First return port 32: Second return port 33: Primary side port 34: Secondary side port 40: Pressure boost piston 50: Pilot valve 101: Hydraulic pump 102: Directional control valve 103: First forward pipe 104: First reverse pipe 105: Booster valve 107: Check valve 109: Sequence valve 110: Pilot valve 111, 112, 114, 115: Check valve 113: Boost piston 116: Drain check valve 117: Piston 118: Rod 119: Forward chamber 120: Reverse chamber 121: Hydraulic cylinder 131: Pressure housing 132: Left cylinder 133: Right cylinder 300: Cutting base 310: Operating cutting member 320: Fixed cutting member 401: Workpiece
상기한 목적을 달성하기 위하여 본 발명은 유압실린더의 전진쳄버에 유압을 증압 공급하여 피스톤을 전진시키면 로드의 작동절단부재가 고정절단부재상의 피작업물을 가압하여 파쇄 또는 절단하게 되는 유압식 증압장치에 있어서, 유압펌프의 유압을 방향절환밸브에서 절환하여 전진관로 또는 후진관로를 통해 상기 유압실린더의 전진쳄버 또는 후진쳄버에 공급하도록 설치하되, 상기 유압펌프의 유압이 전진관로를 통해 증압밸브의 절환에 따라 유압관로로 공급되면 대경쳄버에 충전되어 증압피스톤을 좌우이동시키면서 체크밸브가 설치된 증압관로를 거쳐 소경쳄버에 충전되고 스풀의 가압작용에 의해 상기 소경쳄버내의 유압이 증압되어 체크밸브가 설치된 증압공급관로를 통해 증압배출관로를 거쳐 상기 전진관로로 공급되도록 설치되는 것을 특징으로 하는 유압식 증압장치를 제공하게 된다.In order to achieve the above object, the present invention provides a hydraulic pressure booster that pressurizes the piston by advancing hydraulic pressure to the forward chamber of the hydraulic cylinder to press the workpiece on the fixed cutting member to crush or cut the workpiece. The hydraulic pressure of the hydraulic pump is switched in the direction switching valve to be supplied to the forward or backward chamber of the hydraulic cylinder through the forward pipe or the reverse pipe, but the hydraulic pressure of the hydraulic pump is switched to the booster valve through the forward pipe. Accordingly, when supplied to the hydraulic pipe, the large diameter chamber is filled to move the boost piston to the left and right, and the pressure is supplied to the small diameter chamber through the booster pipe with the check valve installed, and the pressure in the small diameter chamber is boosted by the pressure action of the spool. It is installed to be supplied to the forward pipe through the booster discharge pipe line through the furnace It is to provide a hydraulic pressure booster characterized in that.
도면을 참조하여 본 발명을 상세히 설명하기로 한다.The present invention will be described in detail with reference to the drawings.
도2는 본 발명에 따른 유압식 증압장치가 장착된 절단기용 유압시스템을 나타내는 구성도이고, 도3 및 도4는 본 발명에 따른 유압식 증압장치의 작동상태를 나타내는 상태도이다.Figure 2 is a block diagram showing a hydraulic system for a cutter equipped with a hydraulic booster according to the present invention, Figures 3 and 4 is a state diagram showing the operating state of the hydraulic booster according to the present invention.
먼저, 본 발명에 따른 유압식 증압장치에 있어 유압펌프(101)에서 펌핑되는 유압은 a1측으로 절환된 방향제어밸브(102)를 통해 제1전진관로(103)로 공급되면 제2전진관로(p1)를 거쳐 체크밸브(107)를 통해 유압실린더(121)의 전진쳄버(119)를 충전시키게 된다.First, in the hydraulic pressure booster according to the present invention, when the hydraulic pressure pumped from the hydraulic pump 101 is supplied to the first forward pipe 103 through the direction control valve 102 switched to the a1 side, the second forward pipe p1 is provided. Through the check valve 107 to charge the forward chamber 119 of the hydraulic cylinder 121.
이때, 전진쳄버(119)에 충전되는 유압에 의해 피스톤(117)이 전진되면 로드(118)의 작동절단부재(310)가 피작업물(401)을 가압하게 되고, 이에 따라 피작업물에 대한 가압력에 비례하여 전진쳄버(119)와 전진유압관로(a)의 유압이 상승된다.At this time, when the piston 117 is advanced by the hydraulic pressure filled in the forward chamber 119, the operation cutting member 310 of the rod 118 presses the workpiece 401, thereby The hydraulic pressure of the forward chamber 119 and the forward hydraulic line a increases in proportion to the pressing force.
여기서, 전진쳄버(119)와 제3전진관로(a)의 유압이 제2전진관로(p1)의 유압보다 커지면서 체크밸브(107)가 닫히게 되어 제2전진관로(p1)의 유압이 제3전진관로(a)로 더이상 공급되지 않게 된다.Here, the hydraulic pressure of the forward chamber 119 and the third forward pipe (a) is greater than the hydraulic pressure of the second forward pipe (p1) to close the check valve 107 so that the hydraulic pressure of the second forward pipe (p1) is the third forward pipe. It is no longer fed to the furnace (a).
결국, 제2전진관로(p1)의 유압이 서서히 증대되면서 시퀀스밸브(109)의 설정압력보다 커지게 되면 시퀀스밸브가 절환 개방되고, 이에 따라 제2전진관로(p1)의 유압은 개방된 시퀀스밸브를 통해 유압관로(c2)로 공급된다.As a result, when the hydraulic pressure of the second forward pipe p1 is gradually increased and becomes larger than the set pressure of the sequence valve 109, the sequence valve is switched to open. Accordingly, the hydraulic pressure of the second forward pipe p1 is opened. It is supplied to the hydraulic pipe (c2) through.
이때, 유압관로(c2)를 통해 공급되는 유압은 파이럿압력공급포트(k1)로 공급되어지게 되고, 우측스풀(98)의 외주면에 형성되는 우측스풀홈(k3)이 파이럿압력공급포트(k1)와 우측압력감지홈(k5)을 연결하게 된다.At this time, the hydraulic pressure supplied through the hydraulic pipe (c2) is supplied to the pilot pressure supply port (k1), the right spool groove (k3) formed on the outer circumferential surface of the right spool (98) is the pilot pressure supply port (k1) And the right pressure sensing groove (k5).
따라서, 파이럿압력공급포트(k1)를 통해 공급되는 유압관로(c2)의 유압은 우측스풀홈(k3)을 통해 우측압력감지홈(k5)을 거쳐 우측연결포트(c6)로 공급되고, 다시 파이럿밸브(110)를 g2위치로 절환시키게 된다.Therefore, the hydraulic pressure of the hydraulic line c2 supplied through the pilot pressure supply port k1 is supplied to the right connection port c6 via the right pressure sensing groove k5 through the right spool groove k3, and then again to the pilot. The valve 110 is switched to the g2 position.
동시에, 좌측스풀홈(k2)에 의해 좌측압력감지홈(k4)과 리턴라인홈(k6)이 연결되면서 파이럿밸브(110)의 g1위치에 있던 유압이 좌측연결포트(c5)를 통해 좌측압력감지홈(k4)과 리턴라인홈(k6)을 거쳐 좌측드레인관로(t1)로 배출된다.At the same time, the left pressure sensing groove (k4) and the return line groove (k6) is connected by the left spool groove (k2) while the hydraulic pressure at the g1 position of the pilot valve (110) is detected through the left connection port (c5). It is discharged to the left drain pipe line t1 via the groove k4 and the return line groove k6.
여기서, 제1전진관로(103)의 유압이 유압관로(c1)를 통해 g2위치로 절환된 파이럿밸브(110)를 거쳐 유압관로(c4)로 공급되면서 증압밸브(105)를 b1위치로 절환하게 된다.Here, the hydraulic pressure of the first forward pipe (103) is supplied to the hydraulic pipe (c4) via the pilot valve 110 switched to the g2 position through the hydraulic pipe (c1) to switch the booster valve 105 to the b1 position do.
이처럼, 증압밸브(105)가 b1위치로 절환되면 b2위치의 유압은 유압관로(c3)로 드레인되어 g2위치로 절환된 파이럿밸브(110)를 통해 제2후진관로(p2)로 배출되도록 구성되어 있다.As such, when the booster valve 105 is switched to the b1 position, the hydraulic pressure at the b2 position is drained into the hydraulic line c3 and discharged to the second reverse line p2 through the pilot valve 110 switched to the g2 position. have.
이때, 유압펌프(101)에서 펌핑되는 유압은 제1전진관로(103)를 통해 b1위치로 절환된 증압밸브(105)를 거쳐 좌측유압관로(p3)를 거쳐 좌측대경쳄버(v1)에 충전되면서 좌측스풀(99)의 좌측증압관로(q1)로 공급되어지게 된다.At this time, the hydraulic pressure pumped from the hydraulic pump 101 is filled in the left large diameter chamber (v1) via the left hydraulic pipe (p3) via the booster valve 105 switched to the b1 position through the first forward pipe (103). The left pressure booster (q1) of the left spool 99 is supplied.
그리고, 좌측스풀(99)의 좌측증압관로(q1)로 공급되어지는 유압은 체크밸브(112)를 통해 좌측실린더(132)의 내부에 형성된 좌측소경쳄버(v3)를 충전하게 된다.In addition, the hydraulic pressure supplied to the left pressure booster channel q1 of the left spool 99 fills the left small diameter chamber v3 formed in the left cylinder 132 through the check valve 112.
따라서, 좌측대경쳄버(v1)와 좌측소경쳄버(v3)에 충전되는 유압에 의해 증압피스톤(113)이 우측으로 이동하게 되고, 이에 따라 우측스풀(98)에 의해 우측소경쳄버(v4)의 유압이 가압되면서 증압된다.Therefore, the pressure-increasing piston 113 moves to the right by the hydraulic pressure filled in the left large diameter chamber v1 and the left small diameter chamber v3, and accordingly, the hydraulic pressure of the right small diameter chamber v4 is moved by the right spool 98. It is boosted while it is pressurized.
특히, 좌측대경쳄버(v1)에 유압이 충전되면서 증압피스톤(113)이 우측으로 이동되면 우측대경쳄버(v2)의 유압은 우측유압관로(p4)를 통해 드레인된다.In particular, when the pressure boosting piston 113 is moved to the right while the hydraulic pressure is filled in the left large diameter chamber v1, the hydraulic pressure of the right large diameter chamber v2 is drained through the right hydraulic pipe line p4.
또한, 가압에 의해 증압된 우측소경쳄버(v4)의 유압은 체크밸브(115)를 통해 우측증압공급관로(q4)를 거쳐 증압연결관로(h)로 공급되고, 이어서 증압배출관로(p5)와 연결된 제3전진관로(a)를 통해 유압실린더(121)의 전진쳄버(119)에 공급되어 작동절단부재(310)의 가압력을 증대시키게 된다.In addition, the hydraulic pressure of the right small diameter chamber v4 that is increased by pressurization is supplied to the boosting connection line h through the right booster supply line q4 via the check valve 115, and then to the booster discharge line p5. It is supplied to the forward chamber 119 of the hydraulic cylinder 121 through the third forward pipe (a) connected to increase the pressing force of the operation cutting member (310).
이때, 증압피스톤(113)이 우측으로 완전히 이동되면 좌측스풀홈(k2)에 의해 좌측압력감지홈(k4)과 파이럿압력공급포트(k1)가 연결되면서 파이럿압력공급포트(k1)를 통해 공급되는 유압관로(c2)의 유압은 좌측스풀홈(k2)과좌측압력감지홈(k4)을 거쳐 좌측연결포트(c5)로 공급되고, 다시 파이럿밸브(110)를 g1위치로 절환시키게 된다.At this time, when the boosting piston 113 is completely moved to the right side, the left pressure sensing groove k4 and the pilot pressure supply port k1 are connected by the left spool groove k2 and are supplied through the pilot pressure supply port k1. The hydraulic pressure of the hydraulic pipe (c2) is supplied to the left connection port (c5) through the left spool groove (k2) and the left pressure sensing groove (k4) to switch the pilot valve 110 to the g1 position again.
동시에, 우측스풀홈(k3)에 의해 우측압력감지홈(k5)과 리턴라인홈(k7)이 연결되면서 파이럿밸브(110)의 g2위치에 있던 유압이 우측연결포트(c6)를 통해 우측압력감지홈(k5)과 리턴라인홈(k7)을 거쳐 우측드레인관로(t2)로 배출된다.At the same time, the right pressure sensing groove k5 and the return line groove k7 are connected by the right spool groove k3 and the hydraulic pressure at the g2 position of the pilot valve 110 is sensed through the right connection port c6. It is discharged to the right drain pipe line t2 via the groove k5 and the return line groove k7.
따라서, 제1전진관로(103)의 유압이 유압관로(c1)를 통해 g1위치로 절환된 파이럿밸브(110)를 거쳐 유압관로(c3)로 공급되면서 증압밸브(105)를 b2위치로 절환하게 된다.Therefore, the hydraulic pressure of the first forward pipe line 103 is supplied to the hydraulic pipe line c3 via the pilot valve 110 switched to the g1 position through the hydraulic pipe line c1 to switch the booster valve 105 to the b2 position. do.
이처럼, 증압밸브(105)가 b2위치로 절환되면 b1위치의 유압은 유압관로(c4)로 드레인되어 g1위치로 절환된 파이럿밸브(110)를 통해 제2후진관로(p2)로 배출되도록 구성되어 있다.As such, when the booster valve 105 is switched to the b2 position, the hydraulic pressure at the b1 position is drained to the hydraulic line c4 and discharged to the second reverse line p2 through the pilot valve 110 switched to the g1 position. have.
여기서, 유압펌프(101)에서 펌핑되는 유압은 제1전진관로(103)를 통해 b2위치로 절환된 증압밸브(105)를 거쳐 우측유압관로(p4)를 거쳐 우측대경쳄버(v2)에충전되면서 우측스풀(98)의 우측증압관로(q2)로 공급되어지게 된다.Here, the hydraulic pressure pumped from the hydraulic pump 101 is charged to the right large diameter chamber (v2) via the right hydraulic pipe line (p4) via the booster valve 105 switched to the b2 position through the first forward pipe (103). The right booster (q2) of the right spool (98) is supplied.
그리고, 우측스풀(98)의 우측증압관로(q2)로 공급되어지는 유압은 체크밸브(114)를 통해 우측실린더(133)의 내부에 형성된 우측소경쳄버(v4)를 충전하게 된다.In addition, the hydraulic pressure supplied to the right pressure booster channel q2 of the right spool 98 fills the right small diameter chamber v4 formed in the right cylinder 133 through the check valve 114.
따라서, 우측대경쳄버(v2)와 우측소경쳄버(v4)에 충전되는 유압에 의해 증압피스톤(113)이 좌측으로 이동하게 되고, 이에 따라 좌측스풀(99)에 의해 좌측소경쳄버(v3)의 유압이 가압되면서 증압된다.Therefore, the pressure-increasing piston 113 moves to the left side by the hydraulic pressure filled in the right large diameter chamber v2 and the right small diameter chamber v4, and thus the hydraulic pressure of the left small diameter chamber v3 is moved by the left spool 99. The pressure is increased while being pressurized.
특히, 우측대경쳄버(v2)에 유압이 충전되면서 증압피스톤(113)이 좌측으로 이동되면 좌측대경쳄버(v1)의 유압은 좌측유압관로(p3)를 통해 드레인된다.In particular, when the pressure boosting piston 113 is moved to the left while the hydraulic pressure is filled in the right large diameter chamber v2, the hydraulic pressure of the left large diameter chamber v1 is drained through the left hydraulic pipe line p3.
또한, 가압에 의해 증압된 좌측소경쳄버(v3)의 유압은 체크밸브(111)를 통해 좌측증압공급관로(q3)를 거쳐 증압연결관로(h)로 공급되고, 이어서 증압배출관로(p5)와 연결된 제3전진관로(a)를 통해 유압실린더(121)의 전진쳄버(119)에 공급되어 작동절단부재(310)의 가압력을 증대시키게 된다.In addition, the hydraulic pressure of the left small diameter chamber v3, which is increased by pressurization, is supplied to the boosting connection line h through the left boosting supply line q3 through the check valve 111, and then to the boosting discharge line p5. It is supplied to the forward chamber 119 of the hydraulic cylinder 121 through the third forward pipe (a) connected to increase the pressing force of the operation cutting member (310).
이처럼, 증압피스톤(113)의 좌우측이동에 의해 증압된 유압이 연속적으로 증압배출관로(p5)를 통해 전진쳄버(119)에 공급되어 작동절단부재(310)의 가압력을 증가시키게 된다.Thus, the hydraulic pressure boosted by the left and right movement of the pressure-increasing piston 113 is continuously supplied to the forward chamber 119 through the pressure-increasing discharge line (p5) to increase the pressing force of the operating cutting member (310).
이때, 증압된 유압이 전진쳄버(119)에 충전되면서 피스톤(117)이 전진되고, 이에 따라 후진쳄버(120)의 유압은 제2후진관로(p2)를 통해 제1후진관로(104)를 거쳐 유압탱크로 배출된다.At this time, the piston 117 is advanced while the pressure-increased hydraulic pressure is filled in the forward chamber 119, and thus the hydraulic pressure of the reverse chamber 120 passes through the first reverse pipe line 104 through the second reverse pipe line p2. Drained into the hydraulic tank.
한편, 피작업물(401)에 대한 절단 또는 파쇄작업이 완료되면 피스톤(117)을후진시켜 작동절단부재(310)를 원위치시키도록 유압실린더(121)를 작동시키게 된다.On the other hand, when the cutting or shredding work for the workpiece 401 is completed, the hydraulic cylinder 121 is operated to retract the piston 117 to return the operation cutting member 310 to its original position.
여기서, 방향제어밸브(102)를 a2위치로 절환하게 되면 유압펌프(101)에서 펌핑되는 유압은 제1후진관로(104) 및 제2후진관로(p2)를 통해 유압실린더(121)의 후진쳄버(120)에 충전된다.Here, when the directional control valve 102 is switched to the a2 position, the hydraulic pressure pumped by the hydraulic pump 101 is reversed by the reverse cylinder of the hydraulic cylinder 121 through the first reverse pipe 104 and the second reverse pipe p2. 120 is charged.
이때, 제1후진관로(104)를 통해 공급되는 유압펌프(101)의 유압이 밸브가압관로(p6)로 공급되어 체크밸브(107)를 개방하게 된다.At this time, the hydraulic pressure of the hydraulic pump 101 supplied through the first reverse pipe 104 is supplied to the valve pressure pipe line p6 to open the check valve 107.
이에 따라, 피스톤(117)이 후진되면서 전진쳄버(119)의 유압을 가압하게 되고, 전진쳄버내의 유압은 제3전진관로(a)를 통해 배출되면서 밸브가압관로(p6)의 유압에 의해 개방된 체크밸브(107)를 통해 제2전진관로(p1)로 배출되어 제1전진관로(103)를 거쳐 유압탱크로 드레인된다.Accordingly, the piston 117 is reversed to pressurize the hydraulic pressure of the forward chamber 119, the hydraulic pressure in the forward chamber is discharged through the third forward pipe (a) while being opened by the hydraulic pressure of the valve pressure pipe (p6). The check valve 107 is discharged to the second forward pipe line p1 and drained to the hydraulic tank via the first forward pipe line 103.
본 발명은 증압피스톤과 스풀의 단면적비(A2/A1)를 충분히 크게 함으로써 증압효율을 향상시킬 수 있고, 단일유압공급구조로 구성되어 공급유압의 관리가 용이하며, 공급된 유압을 다시 드레인할 수 있어 그 구조가 간단하면서 콤팩트한 효과를 제공하게 된다.The present invention can improve the boosting efficiency by sufficiently increasing the cross sectional area ratio (A 2 / A 1 ) of the boosting piston and the spool, and is composed of a single hydraulic supply structure to easily manage the supply hydraulic pressure and drain the supplied hydraulic pressure again. The structure is simple and provides a compact effect.
Claims (5)
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| JPH05340111A (en) * | 1992-06-05 | 1993-12-21 | Sango Juki Kk | Crusher |
| KR19980011412U (en) * | 1996-08-20 | 1998-05-25 | 정재송 | Check Valve Structure of Ultra High Pressure Cylinder for Intensifier |
| KR20000021954A (en) * | 1998-09-30 | 2000-04-25 | 토니헬샴 | Hydraulic pressure control valve for heavy equipments |
| KR20000033693A (en) * | 1998-11-25 | 2000-06-15 | 추호석 | Valve of speed increase for crusher |
| KR20030012255A (en) * | 2001-07-31 | 2003-02-12 | 현대자동차주식회사 | Intensifying cylinder for drawing mold core |
| KR200261893Y1 (en) * | 2001-08-17 | 2002-01-26 | 대모 엔지니어링 주식회사 | Oil pressure device for crusher and shear |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180057162A (en) * | 2016-11-22 | 2018-05-30 | 맥스엔지니어링(주) | Linear fluid pump with differential area piston and built-in valve |
| KR20190065204A (en) | 2019-05-23 | 2019-06-11 | 맥스엔지니어링(주) | Linear fluid pump with differential area piston and built-in valve |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010110278A (en) | 2001-12-12 |
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