KR102137402B1 - Hydraulic actuation system having efficient installation structure of autoamtic flow compensation valve - Google Patents

Hydraulic actuation system having efficient installation structure of autoamtic flow compensation valve Download PDF

Info

Publication number
KR102137402B1
KR102137402B1 KR1020190011579A KR20190011579A KR102137402B1 KR 102137402 B1 KR102137402 B1 KR 102137402B1 KR 1020190011579 A KR1020190011579 A KR 1020190011579A KR 20190011579 A KR20190011579 A KR 20190011579A KR 102137402 B1 KR102137402 B1 KR 102137402B1
Authority
KR
South Korea
Prior art keywords
hydraulic
compensation valve
hydraulic pump
oil
storage tank
Prior art date
Application number
KR1020190011579A
Other languages
Korean (ko)
Inventor
박성환
Original Assignee
주식회사 에프피씨
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 에프피씨 filed Critical 주식회사 에프피씨
Priority to KR1020190011579A priority Critical patent/KR102137402B1/en
Application granted granted Critical
Publication of KR102137402B1 publication Critical patent/KR102137402B1/en

Links

Images

Classifications

    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil
    • 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
    • F15B2211/2053—Type of pump
    • F15B2211/20561—Type of pump reversible

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The present invention provides a hydraulic actuation system having a structure for a hydraulic fluid to rapidly flow from a storage tank into an automatic flow compensation valve, wherein the automatic flow compensation valve can be protected from an external shock and the whole apparatus can be configured to be compact. The present invention includes: a box shaped storage tank; a hydraulic pump fixated on a side surface of the storage tank; an electric motor coupled to the hydraulic pump to drive the hydraulic pump; and the automatic flow compensation valve connecting the hydraulic pump to the storage tank to control flow of the hydraulic fluid of the storage tank to compensate for a flow difference according to expansion and compression of a hydraulic driver when the hydraulic pump drives the hydraulic driver, wherein the automatic flow compensation valve protrudes inwards to occupy a partial space of the internal space of the storage tank in the state of being fixed on the side surface of the storage tank.

Description

자동유량보상밸브의 효율적 설치구조를 가진 유압작동시스템{HYDRAULIC ACTUATION SYSTEM HAVING EFFICIENT INSTALLATION STRUCTURE OF AUTOAMTIC FLOW COMPENSATION VALVE}HYDRAULIC ACTUATION SYSTEM HAVING EFFICIENT INSTALLATION STRUCTURE OF AUTOAMTIC FLOW COMPENSATION VALVE}

본 발명은 자동유량보상밸브의 효율적 설치구조를 가진 유압작동시스템에 관한 것으로서, 편로드 실린더 등 유압구동기의 작동시 양측 포트에 입출력되는 체적유량의 차이를 자동으로 보상하는 자동유량보상밸브 등을 실제 장치로 구현함에 있어 원활한 작동이 가능하도록 하고 공간적 배치를 효율화시킨 구조의 유압작동시스템에 관한 것이다.The present invention relates to a hydraulic operation system having an efficient installation structure of an automatic flow compensation valve, and an automatic flow compensation valve, etc., which automatically compensates for a difference in volume flow in/out at both ports when operating a hydraulic actuator such as a single rod cylinder It relates to a hydraulic operation system having a structure that enables a smooth operation in implementing the device and efficient spatial arrangement.

유압 작동식 편로드 실린더는 리프트, 성형장치 등의 구동장치에 많이 채용되고 있다.The hydraulically operated single rod cylinder is widely used in driving devices such as lifts and forming devices.

그러한, 편로드 실린더는 피스톤의 일단에만 로드가 설치된 구조적 특성에 기인하여, 양측에서 출입하는 체적유량의 차이가 발생하므로 이에 대한 보상이 절대적으로 필요하다.Such a single-rod cylinder is absolutely necessary to compensate for the difference in the volumetric flow rate entering and exiting the two sides due to the structural characteristics in which the rod is installed only at one end of the piston.

도 1은 종래 유압작동시스템의 회로를 도시하고 있는 것으로서, 한국등록특허공보 제10-1694889호에 기재된 것이다.1 is a circuit diagram of a conventional hydraulic operation system, which is described in Korean Patent Registration No. 10-1694889.

도 1의 (a)를 참조하면, 상기 유압실린더(1)가 확장되는 과정에서, 양방향형 기어펌프(2)의 제1구획영역(2a)을 통해 작동유가 압출되며, 압출된 작동유는 제1공급라인(3a)을 따라 유압실린더(1)의 일측(1a)으로 공급된다.Referring to Figure 1 (a), in the process of the hydraulic cylinder 1 is expanded, the hydraulic fluid is extruded through the first compartment 2a of the bidirectional gear pump 2, the extruded hydraulic oil is the first It is supplied to one side 1a of the hydraulic cylinder 1 along the supply line 3a.

이때, 피스톤(1c)이 타측으로 이동되며, 유압실린더(1)의 타측(1b)의 작동유가 타측(3b)으로 배출된다. 여기서, 피스톤(1c) 로드(1d)의 체적으로 인해, 타측(3b)을 통해 제2구획영역(2b)으로 주입되는 체적유량이 제1공급라인(3a)을 따라 유압실린더(1)의 일측(1a)으로 공급되는 체적유량보다 적으므로 제2구획영역(2b)의 압력이 저하된다. 이때, 작동유가 압출되는 제1구획영역(2a)에는 제2구획영역(2b)에 비해 높은 유압이 형성된다.At this time, the piston 1c is moved to the other side, and the hydraulic oil of the other side 1b of the hydraulic cylinder 1 is discharged to the other side 3b. Here, due to the volume of the piston (1c) rod (1d), the volume flow rate injected into the second compartment (2b) through the other side (3b) along one side of the first supply line (3a) of the hydraulic cylinder (1) Since it is less than the volume flow rate supplied to (1a), the pressure in the second compartment 2b decreases. At this time, a higher hydraulic pressure than the second compartment 2b is formed in the first compartment 2a where the hydraulic oil is extruded.

이에 따라, 제1구획영역(2a)측 제1급유라인(4a)과 연결된 제2파일럿관(5a)의 압력에 의해 자동유량보상밸브(8)의 제2전환밸브부(6b)가 개방되고, 저유탱크(7)의 작동유가 낮은 압력상태의 제2구획영역(2b)으로 흡입될 수 있다.Accordingly, the second switching valve part 6b of the automatic flow compensation valve 8 is opened by the pressure of the second pilot pipe 5a connected to the first refueling line 4a on the side of the first compartment 2a. , The operating oil of the low oil tank 7 can be sucked into the second compartment 2b in a low pressure state.

이에, 유압시스템(1)의 필요 작동유량이 보충되어 안정적으로 작동이 유지될 수 있다.Accordingly, the required operating flow rate of the hydraulic system 1 is replenished so that the operation can be stably maintained.

한편, 도 1의 (b)를 참조하면, 상기 유압실린더(1)가 수축되는 과정에서, 양방향형 기어펌프(2)의 제2구획영역(2b)을 통해 작동유가 압출되며, 압축된 작동유는 타측(3b)을 거쳐 유압실린더(1)의 타측(1b)으로 공급된다.On the other hand, referring to Figure 1 (b), in the process of the hydraulic cylinder 1 is contracted, the hydraulic fluid is extruded through the second compartment 2b of the bidirectional gear pump 2, the compressed hydraulic oil is It is supplied to the other side 1b of the hydraulic cylinder 1 via the other side 3b.

이때, 피스톤(1c)이 일측으로 이동되며, 유압실린더(1) 일측(1a)의 작동유가 제1공급라인(3a)으로 배출된다. 여기서, 피스톤(1c) 로드(1d)의 체적으로 인해, 유압실린더(1)의 타측(1b)으로 공급되는 작동유량보다 유압실린더(1)의 일측(1a)으로부터 배출되는 체적유량이 많고, 작동유가 압출되는 제2구획영역(2b)에는 제1구획영역(2a)에 비해 높은 유압이 형성된다.At this time, the piston (1c) is moved to one side, the hydraulic fluid of the hydraulic cylinder (1) (1a) is discharged to the first supply line (3a). Here, due to the volume of the piston 1c and the rod 1d, the volumetric flow rate discharged from one side 1a of the hydraulic cylinder 1 is larger than the operating flow rate supplied to the other side 1b of the hydraulic cylinder 1, and the operating oil In the second compartment 2b to be extruded, a higher hydraulic pressure is formed than the first compartment 2a.

이에 따라, 제2구획영역(2b)측 제2급유라인(4b)과 연결된 자동유량보상밸브(8)의 제1파일럿관(5b)의 압력에 의해 제1전환밸브부(6a)가 개방되고, 제1공급라인(3a)으로 과량 토출된 작동유가 제1구획영역(2a)에서 제1전환밸브부(6a)를 거쳐 저유탱크(7)로 배출될 수 있다.Accordingly, the first switching valve part 6a is opened by the pressure of the first pilot pipe 5b of the automatic flow compensation valve 8 connected to the second refueling line 4b on the side of the second compartment 2b. , The excess hydraulic fluid discharged to the first supply line 3a may be discharged from the first compartment 2a through the first switching valve part 6a to the low oil tank 7.

결국, 자동유량보상밸브(8)의 설치로 인해, 편로드 유압실린더의 작동에 따른 작동유의 초과분 및 부족분이 정확한 유량으로 신속하게 유압실린더(1)에 공급되거나 저유탱크(7)로 배출될 수 있어 유압시스템(1) 내의 필요 작동유량이 안정적으로 유지될 수 있다.After all, due to the installation of the automatic flow compensation valve (8), the excess and shortage of hydraulic oil according to the operation of the single-load hydraulic cylinder can be quickly supplied to the hydraulic cylinder (1) or discharged to the low oil tank (7) at an accurate flow rate. Therefore, the required operating flow rate in the hydraulic system 1 can be stably maintained.

전술한 종래의 유압작동시스템을 실제 장치로 구현시, 짧은 시간에 작동유의 신속한 보상이 이루어져야 하고, 작동유의 압력에 매우 민감하게 자동유량보상밸브(8)가 반응하도록 유지함으로써, 설정된 작동성능을 기대할 수 있다. When the above-described conventional hydraulic operation system is implemented as an actual device, quick compensation of hydraulic oil should be made in a short time, and the automatic flow compensation valve 8 is very sensitive to the pressure of the hydraulic oil, so that the set operating performance can be expected. Can.

그러한 실제 장치의 구현시 작동유의 출입에 지연이 발생하므로, 원활한 작동을 위해서는 자동유량보상밸브(8)를 통과하는 작동유의 흡입 및 배출이 지연없이 신속하게 이루어질 수 있는 구조가 구현될 필요가 있다.When implementing such an actual device, a delay occurs in the flow of hydraulic oil, so for smooth operation, it is necessary to implement a structure in which suction and discharge of hydraulic oil passing through the automatic flow compensation valve 8 can be made quickly and without delay.

또한, 유압작동시스템이 거친 작업현장에서 사용되는 경우가 많으므로, 자동유량보상밸브(8)의 정밀한 작동성능을 유지하기 위해 외부충격으로부터 보호되어야 하고, 전체적으로 컴팩트(compact)한 구조를 구현하여 타 설치구조와 간섭없는 구조를 가질 필요가 있다.In addition, since the hydraulic operation system is often used in a rough work site, it must be protected from external shock to maintain the precise operation performance of the automatic flow compensation valve (8), and implements a compact structure as a whole. It is necessary to have a structure that does not interfere with the installation structure.

본 발명은 상기와 같은 관점에서 도출된 것으로서, 본 발명의 목적은 저유탱크로부터 작동유가 자동유량보상밸브로 신속하게 유출입될 수 있는 구조를 가짐과 함께, 외부충격에 의해 자동유량보상밸브가 보호될 수 있고, 전체 장치의 구조를 컴팩트(compact)하게 구성할 수 있는 유압작동시스템을 제공하는 것이다.The present invention has been derived in view of the above, the object of the present invention is that the hydraulic oil from the low oil tank has a structure that can be quickly flowed into and out of the automatic flow compensation valve, the automatic flow compensation valve is protected by external shock It is possible to provide a hydraulic operating system capable of compactly configuring the structure of the entire apparatus.

또한, 본 발명의 다른 목적은 다량의 작동유를 필요로 하는 대형의 유압실린더에 대용량의 저유탱크를 일체로 결합시키지 않고 별도로 구성하는 경우에 있어서 자동유량보상밸브의 설치를 효율화하고 전술한 작동유의 신속한 유출입 등이 가능하도록 하는 컴팩트한 구조의 유압작동시스템을 제공하는 것이다.In addition, another object of the present invention is to efficiently install the automatic flow compensation valve in the case of separately configuring a large-capacity low-pressure tank in a large hydraulic cylinder that requires a large amount of hydraulic oil, without integrating it, and to quickly implement the aforementioned hydraulic oil. It is to provide a hydraulic operating system of a compact structure to enable the flow in and out.

전술한 목적을 달성하기 위해 본 발명은, 박스형상의 저유탱크와, 상기 저유탱크의 측면에 고정된 유압펌프와, 상기 유압펌프와 결합되어 상기 유압펌프를 구동시키는 전동모터와, 상기 유압펌프와 상기 저유탱크를 연결하여 상기 유압펌프가 유압구동기를 구동시, 상기 유압구동기의 신축에 따른 유량차를 보상하도록 상기 저유탱크의 작동유의 유동을 제어하는 자동유량보상밸브를 포함하는 유압작동시스템에 있어서, 상기 자동유량보상밸브는, 상기 저유탱크의 측면에 고정된 상태에서 상기 저유탱크의 내부공간 중 일부공간을 차지하도록 내측으로 돌출되어 있는 것을 특징으로 한다.In order to achieve the above object, the present invention, a box-shaped low oil tank, a hydraulic pump fixed to the side of the low oil tank, an electric motor coupled to the hydraulic pump to drive the hydraulic pump, and the hydraulic pump In the hydraulic operation system including an automatic flow rate compensation valve to control the flow of the hydraulic oil of the storage tank by connecting the storage tank to compensate for the flow rate difference according to the expansion and contraction of the hydraulic drive when the hydraulic pump drives the hydraulic actuator , The automatic flow compensation valve is characterized in that it protrudes inward so as to occupy a part of the internal space of the storage tank in a state fixed to the side of the storage tank.

또한, 본 발명에 따른 유압작동시스템은, 상기 자동유량보상밸브가 상기 저유탱크의 하부에 설치되어 상기 저유탱크의 유면의 아래에 위치하는 것을 또 다른 특징으로 한다.In addition, the hydraulic operation system according to the present invention, the automatic flow compensation valve is installed in the lower portion of the low oil tank is further characterized in that located below the oil level of the low oil tank.

또한, 본 발명에 따른 유압작동시스템은, 상기 유압구동기가 편로드 유압실린더이고, 상기 자동유량보상밸브는 상기 저유탱크의 하부에 설치되고, 상기 유압실린더가 최대로 신장된 상태에서 상기 저유탱크에 수용된 작동유의 유면의 높이보다 더 아래에 위치하는 것을 또 다른 특징으로 한다.In addition, the hydraulic operation system according to the present invention, the hydraulic actuator is a single-load hydraulic cylinder, the automatic flow compensation valve is installed in the lower portion of the low oil tank, the hydraulic cylinder to the low oil tank in the state of maximum elongation Another feature is that it is located below the height of the oil level of the received hydraulic oil.

또한, 본 발명에 따른 유압작동시스템은, 상기 유압펌프와 상기 전동모터는 커플링블록에 의해 서로 결합되는 것으로, 상기 커플링블록의 전면에 상기 유압펌프가 고정되고 후면에 상기 전동모터가 고정되며, 상기 커플링블록이 상기 저유탱크의 측면에 고정됨으로써 상기 유압펌프가 상기 저유탱크의 측면에 고정되는 것이고, 상기 커플링블록의 전단부에 상기 유압펌프를 감싸 보호하는 펌프보호커버가 결합되고, 상기 커플링블록에는 전면에 설치되는 것으로서 상기 유압구동기와 연결되어 작동유가 출입하는 제1 및 제2포트와, 내부에 형성되어 상기 제1 및 제2포트를 상기 유압펌프와 각각 연결하는 제1 및 제2내부유로를 포함하며, 상기 유압펌프와 상기 자동유량보상밸브를 연결하여 작동유가 출입하는 연결라인은, 상기 펌프보호커버의 내부공간를 통해 연장되면서 상기 펌프보호커버와 상기 저유탱크가 서로 대향하는 영역에 배치되는 것을 또 다른 특징으로 한다.In addition, in the hydraulic operation system according to the present invention, the hydraulic pump and the electric motor are coupled to each other by a coupling block, wherein the hydraulic pump is fixed to the front side of the coupling block and the electric motor is fixed to the rear side. , The coupling block is fixed to the side of the low oil tank, so that the hydraulic pump is fixed to the side of the low oil tank, and a pump protection cover is provided to wrap and protect the hydraulic pump at the front end of the coupling block, The coupling block, which is installed on the front surface, is connected to the hydraulic actuator, the first and second ports through which hydraulic oil enters, and the first and second ports formed therein to connect the first and second ports with the hydraulic pump, respectively. A connection line including a second internal flow path, through which the hydraulic pump and the automatic flow compensation valve are connected to allow hydraulic oil to enter and exit, extends through the inner space of the pump protection cover so that the pump protection cover and the low oil tank face each other. Another feature is that it is arranged in the region.

본 발명에 따른 유압작동시스템은, 자동유량보상밸브가 저유탱크의 측면에 고정된 상태에서 저유탱크의 내부공간 중 일부공간을 차지하도록 내측으로 돌출되도록 설치됨으로써, 보상유로를 통한 작동유의 신속한 출입이 이루어질 수 있고, 저유탱크의 작동유의 수위를 높여 보상유로로 유입시 매우 신속하고 원활하게 유입될 수 있는 수위압력을 제공한다.The hydraulic operation system according to the present invention is installed so that the automatic flow compensation valve protrudes inward so as to occupy a part of the inner space of the low oil tank in a state fixed to the side of the low oil tank, so that the quick access of the hydraulic oil through the compensation flow It can be made, and increases the level of the working oil in the low oil tank to provide a level pressure that can be introduced very quickly and smoothly when flowing into the compensation channel.

이에 따라, 유압구동기를 작동시키는 유압작동시스템을 실제 장치로 구현시, 짧은 시간에 작동유의 신속한 보상이 이루어질 수 있고, 작동유의 압력에 매우 민감하게 자동유량보상밸브가 반응하도록 유지함으로써, 우수한 작동성능을 기대할 수 있다. Accordingly, when the hydraulic operation system for operating the hydraulic actuator is implemented as a real device, quick compensation of hydraulic oil can be achieved in a short time, and the automatic flow compensation valve is very sensitive to the pressure of the hydraulic oil, thereby maintaining excellent operating performance. Can be expected.

또한, 본 발명에 따른 유압작동시스템은, 자동유량보상밸브와 그것에 연결된 연결라인 등이 저유탱크의 외측에서 외부로의 노출을 최소화하여 컴팩트(compact)한 구성을 이루고 있다.In addition, in the hydraulic operation system according to the present invention, an automatic flow compensation valve and a connection line connected to it have a compact configuration by minimizing exposure from the outside of the low oil tank to the outside.

또한, 저유탱크의 측면에 고정된 커플링블록의 전단부에 유압펌프 및 펌프보호커버가 결합되고, 커플링블록의 후단부에 전동모터가 결합되도록 구성하며, 커플링블록의 내부에서 유로를 형성함으로써, 저유탱크의 측방에서 전체적인 구성이 컴팩트하게 이루어지도록 하고 현장에서의 설치가 용이한 단위모듈로서의 역할을 하게 한다.In addition, the hydraulic pump and the pump protection cover are coupled to the front end of the coupling block fixed to the side of the low oil tank, and the electric motor is coupled to the rear end of the coupling block, forming a flow path inside the coupling block. By doing so, the overall configuration is made compact on the side of the storage tank and serves as a unit module that is easy to install in the field.

이에 따라, 유압작동시스템의 실제 구현시, 자동유량보상밸브의 정밀한 작동성능을 유지하기 위해 외부충격으로부터 보호될 수 있고, 전체적으로 컴팩트(compact)한 구조를 구현하여 타 설치구조와 간섭없이 현장에서의 용이한 설치가 가능하다.Accordingly, in the actual implementation of the hydraulic operation system, it can be protected from external shock to maintain the precise operation performance of the automatic flow compensation valve, and implements a compact structure as a whole, without interference with other installation structures. Easy installation is possible.

특히, 다량의 작동유를 필요로 하는 대형의 유압실린더에 대용량의 저유탱크를 유압실린더와 일체화할 수 없는 구조에서, 본 발명은 자동유량보상밸브 등의 설치를 효율화하고 전술한 우수한 작동성능을 가짐에 있어 효과적이다.In particular, in a structure in which a large-capacity low-pressure tank cannot be integrated with a hydraulic cylinder in a large-sized hydraulic cylinder requiring a large amount of hydraulic oil, the present invention streamlines the installation of an automatic flow compensation valve, etc. It is effective.

도 1의 (a) 및 (b)는 종래 유압작동시스템의 작동설명도
도 2는 본 발명의 실시예에 따른 유압작동시스템의 전체 구성을 도시하는 구성설명도
도 3은 본 발명의 실시예에 따른 유압작동시스템의 회로 구성을 도시하는 구성설명도
도 4는 본 발명의 실시예에 따른 유압작동시스템의 내부구조를 도시하는 구성설명도
도 5는 본 발명의 실시예에 따른 유압작동시스템의 측방구성을 도시하는 구성설명도
도 6의 (a) 및 (b)는 본 발명의 실시예에 따른 유압작동시스템에서 저유탱크 내부에 자동유량보상밸브가 설치됨에 따른 작동유의 수위변화를 설명하는 설명도Figure 1 (a) and (b) is an operation diagram of a conventional hydraulic operating system
Figure 2 is an explanatory diagram showing the overall configuration of the hydraulic operating system according to an embodiment of the present invention
3 is a configuration explanatory diagram showing a circuit configuration of a hydraulic operation system according to an embodiment of the present invention
Figure 4 is an explanatory diagram showing the internal structure of the hydraulic operating system according to an embodiment of the present invention
5 is a configuration explanatory diagram showing a side configuration of the hydraulic operation system according to an embodiment of the present invention
6 (a) and (b) is an explanatory diagram for explaining the change in the water level of the hydraulic oil as the automatic flow compensation valve is installed inside the low oil tank in the hydraulic operating system according to the embodiment of the present invention.

이하, 도면을 참고하여 본 발명의 실시예를 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

도 2 및 도 3을 참조하면, 본 발명의 실시예에 따른 유압작동시스템은, 박스형상의 저유탱크(10)와, 상기 저유탱크(10)의 측면(12)에 고정된 유압펌프(20)와, 상기 유압펌프(20)와 결합되어 상기 유압펌프(20)를 구동시키는 전동모터(30)와, 상기 유압펌프(20)와 저유탱크(10)를 연결하여 유압펌프(20)가 유압구동기(50)를 구동시, 상기 유압구동기(50)의 신축에 따른 유량차를 보상하도록 저유탱크(10)의 작동유의 유동을 제어하는 자동유량보상밸브(40)를 포함한다.2 and 3, the hydraulic operating system according to an embodiment of the present invention, a box-shaped low oil tank 10 and a hydraulic pump 20 fixed to the side 12 of the low oil tank 10 And, coupled to the hydraulic pump 20 and the electric motor 30 to drive the hydraulic pump 20, and the hydraulic pump 20 and the low oil tank 10 by connecting the hydraulic pump 20 is a hydraulic actuator When driving (50), it includes an automatic flow rate compensation valve (40) for controlling the flow of the working oil of the low oil tank (10) to compensate for the flow rate difference according to the expansion and contraction of the hydraulic actuator (50).

도 3의 유압작동 회로도를 통해, 유압작동시스템의 작용을 살펴보면, 상기 유압구동기(50)가 확장되는 과정에서, 피스톤로드(52)의 체적으로 인해, 제2구획영역(27b)에서 제1구획영역(27a)으로 토출되는 유량에 비해 실린더타측공간(54b)에서 제2구획영역(27b)으로 주입되는 유량이 적고, 작동유가 압출되는 제1구획영역(27a)에는 제2구획영역(27b)에 비해 높은 유압이 형성된다.Looking at the operation of the hydraulic operation system through the hydraulic operation circuit diagram of Figure 3, in the process of the hydraulic actuator 50 is expanded, due to the volume of the piston rod 52, the first compartment in the second compartment (27b) Compared to the flow rate discharged into the area 27a, the flow rate injected into the second compartment area 27b from the cylinder-side space 54b is small, and the second compartment area 27b is provided in the first compartment area 27a where the working oil is extruded. High hydraulic pressure is formed compared to.

이에 따라, 제1구획영역(27a)측 제1연결라인(22)과 연결된 제2파일럿관(46a)의 압력에 의해 자동유량보상밸브(40)의 제2전환밸브부(47b)가 개방되고, 저유탱크(10)의 작동유가 낮은 압력상태의 제2구획영역(27b)으로 흡입될 수 있다.Accordingly, the second switching valve portion 47b of the automatic flow compensation valve 40 is opened by the pressure of the second pilot pipe 46a connected to the first connection line 22 on the first compartment region 27a. , The operating oil of the low oil tank 10 may be sucked into the second compartment 27b in a low pressure state.

상기 유압구동기(50)가 수축되는 과정에서, 피스톤(51)이 일측으로 이동되며, 실린더일측공간(54a)의 작동유가 제1구획영역(27a)으로 배출된다. 여기서, 피스톤로드(52)의 체적으로 인해, 실린더타측공간(54b)으로 공급되는 작동유량보다 실린더일측공간(54a)으로부터 배출되는 체적유량이 많다. 여기서, 작동유가 압출되는 제2구획영역(27b)에는 제1구획영역(27a)에 비해 높은 유압이 형성된다.In the process of the hydraulic actuator 50 contracting, the piston 51 is moved to one side, and the hydraulic fluid in the cylinder one side space 54a is discharged to the first compartment 27a. Here, due to the volume of the piston rod 52, the volume flow rate discharged from the cylinder side space 54a is larger than the operating flow rate supplied to the cylinder side space 54b. Here, a hydraulic pressure higher than that of the first compartment 27a is formed in the second compartment 27b where the working oil is extruded.

이에 따라, 제2구획영역(27b)측 제2연결라인(23)과 연결된 자동유량보상밸브(40)의 제1파일럿관(46b)의 압력에 의해 제1전환밸브부(47a)가 개방되고, 실린더일측공간(54a)에서 제1구획영역(27a)으로 과량 토출된 작동유가 제1구획영역(27a)에서 제1전환밸브부(47a)를 거쳐 저유탱크(10)로 배출될 수 있다.Accordingly, the first switching valve unit 47a is opened by the pressure of the first pilot pipe 46b of the automatic flow compensation valve 40 connected to the second connection line 23 on the second compartment area 27b. , The hydraulic oil excessively discharged from the cylinder side space 54a to the first compartment 27a may be discharged from the first compartment 27a through the first switching valve portion 47a to the low oil tank 10.

따라서, 유압구동기(50)의 신축과정에서 작동유의 초과분 및 부족분이 정확한 유량으로 유압구동기(50) 내지 각 연결라인(22.23)으로 공급되고 저유탱크(10)로 배출될 수 있어, 유압시스템(1) 내의 필요 작동유량이 안정적으로 유지되고 작동을 원활하게 한다.Therefore, during the expansion and contraction of the hydraulic actuator 50, the excess and insufficient parts of the hydraulic oil can be supplied to the hydraulic actuators 50 to each connecting line 22.23 at the correct flow rate and discharged to the low oil tank 10, thereby allowing the hydraulic system 1 ), the required operating flow rate inside is maintained stably and the operation is smooth.

도 2, 도 4 및 도 5는 실제 구현된 유압작동시스템의 구성을 도시하는 것으로서, 유압시스템의 각부의 구체적 결합관계를 설명한다.2, 4 and 5 show the configuration of the actual hydraulic operating system, and describe a specific coupling relationship between parts of the hydraulic system.

상기 저유탱크(10)는 박스형상으로 이루어지고 내부공간에 작동유가 수용됨으로써 자동유량보상밸브(40)를 거쳐 유압펌프(20)로 작동유를 공급하거나 작동유를 공급받을 수 있다.The low oil tank 10 is made of a box shape, and by receiving the working oil in the interior space, the working oil may be supplied to the hydraulic pump 20 through the automatic flow compensation valve 40 or the working oil may be supplied.

저유탱크(10)의 상면에 손실된 작동유를 보충하는 주입구(17)가 설치된다.On the upper surface of the low oil tank (10), an inlet (17) for replenishing the lost hydraulic oil is installed.

상기 유압펌프(20)는 전동모터(30)의 회전력을 전달받아 작동유를 가압하는 부분으로서, 기어펌프가 가장 바람직하다.The hydraulic pump 20 is a portion that receives the rotational force of the electric motor 30 and pressurizes the working oil, and the gear pump is most preferable.

유압펌프(20)는 자동유량보상밸브(40)와 한 쌍의 연결라인(22,23)에 의해 연결되어 자동유량보상밸브(40)를 매개로 저유탱크(10)의 작동유가 출입하도록 연결될 수 있고, 유압구동기(50)와는 커플링블록(60)의 내부에 설치되는 제1 및 제2내부유로(66,67)에 의해 작동유가 출입하도록 연결되어 있다.The hydraulic pump 20 is connected by an automatic flow compensation valve 40 and a pair of connection lines 22 and 23 to be connected to the hydraulic oil of the low oil tank 10 through the automatic flow compensation valve 40. The hydraulic actuator 50 is connected to the hydraulic oil by the first and second internal passages 66 and 67 installed inside the coupling block 60.

유압펌프(20)와 전동모터(30)는 커플링블록(60)에 의해 서로 결합되는 것으로, 커플링블록(60)의 전면(60a)에 유압펌프(20)가 고정되고 후면(60b)에 전동모터(30)가 고정되고, 그들의 중간에 위치하는 커플링블록(60)을 관통하여 전동모터(30)와 유압펌프(20)의 회전축이 서로 연결된다.The hydraulic pump 20 and the electric motor 30 are coupled to each other by a coupling block 60, and the hydraulic pump 20 is fixed to the front surface 60a of the coupling block 60, and to the rear surface 60b. The electric motor 30 is fixed, and the rotating shafts of the electric motor 30 and the hydraulic pump 20 are connected to each other by passing through the coupling block 60 located in the middle of them.

상기 커플링블록(60)은 저유탱크(10)의 측면(12)에 유압펌프(20), 전동모터(30), 펌프보호커버(25)를 고정시키고 서로 결합시키기 위한 지지부재로서의 역할을 한다.The coupling block 60 serves as a support member for fixing and coupling the hydraulic pump 20, the electric motor 30, and the pump protection cover 25 to the side surface 12 of the low oil tank 10. .

커플링블록(60)은 저유탱크(10)의 측면(12)에 브라켓(65)에 의해 고정됨으로써 커플링블록(60)에 결합된 유압펌프(20) 및 전동모터(30)가 저유탱크(10)의 측면(12)에 고정될 수 있도록 한다.The coupling block 60 is fixed to the side 12 of the low oil tank 10 by a bracket 65, so that the hydraulic pump 20 and the electric motor 30 coupled to the coupling block 60 have a low oil tank ( 10) to be fixed to the side (12).

상기 커플링블록(60)에는 유압구동기(50)와 연결되어 작동유가 출입하는 제1 및 제2포트(62,63)가 전면에 설치되고, 커플링블록(60)의 내부에서 제1 및 제2내부유로(66,67)가 제1 및 제2포트(62,63)를 유압펌프(20)와 각각 연결한다.The coupling block 60 is connected to the hydraulic actuator 50, the first and second ports 62 and 63 through which hydraulic oil enters and exits are installed on the front surface, and the first and the first inside the coupling block 60. 2 Internal flow paths 66 and 67 connect the first and second ports 62 and 63 with the hydraulic pump 20, respectively.

제1내부유로(66) 또는 제2내부유로(67)의 압력을 측정하기 위해, 커플링블록(60)의 후면에는 압력센서(71)가 설치된다.In order to measure the pressure of the first internal flow path 66 or the second internal flow path 67, a pressure sensor 71 is installed on the rear surface of the coupling block 60.

커플링블록(60)의 전단부에 유압펌프(20)를 감싸 보호하는 펌프보호커버(25)가 결합됨으로써 커플링블록(60)의 전단부에 결합된 유압펌프(20)를 보호하고 있으며, 펌프보호커버(25)는 커플링블록(60)에 결합된 상태에서 저유탱크(10)의 측면(12)과 나란히 배열됨으로써 내부에 위치하는 유압펌프(20)와, 유압펌프(20)로부터 자동유량보상밸브(40)로 향하는 한 쌍의 연결라인(22,23)를 보호하고 있다.A pump protection cover 25 that wraps and protects the hydraulic pump 20 at the front end of the coupling block 60 is coupled to protect the hydraulic pump 20 coupled to the front end of the coupling block 60, The pump protection cover 25 is automatically arranged from the hydraulic pump 20 and the hydraulic pump 20 located therein by being arranged side by side with the side 12 of the oil storage tank 10 in a state coupled to the coupling block 60. A pair of connection lines 22 and 23 facing the flow compensation valve 40 is protected.

유압펌프(20)와 자동유량보상밸브(40)를 연결하여 작동유가 출입하는 연결라인(22,23)은, 상기 펌프보호커버(25)의 내부공간를 통해 연장되면서, 펌프보호커버(25)와 저유탱크(10)가 서로 대향하는 영역을 지나 자동유량보상밸브(40)까지 연장된다.The hydraulic pump 20 and the automatic flow compensation valve 40 are connected to the connecting lines 22 and 23 through which the hydraulic oil enters and exits, extending through the inner space of the pump protection cover 25, and the pump protection cover 25. The storage tank 10 extends to the automatic flow compensation valve 40 after passing through the regions facing each other.

펌프보호커버(25)와 저유탱크(10)가 서로 대향하는 영역을 통해 연결라인(22,23)이 연결됨으로써 연결라인(22,23)의 외부노출을 최소화하고 펌프보호커버(25)와 저유탱크(10) 사이의 공간이 좁아 외부물체의 충격으로부터 보호되도록 할 수 있다.The connection lines 22 and 23 are connected through an area where the pump protection cover 25 and the storage tank 10 face each other to minimize external exposure of the connection lines 22 and 23, and the pump protection cover 25 and storage oil Since the space between the tanks 10 is narrow, it can be protected from the impact of external objects.

상기 자동유량보상밸브(40)는 연결라인(22,23)에 의해 유압펌프(20)와 연결되고 저유탱크(10)의 작동유를 흡입 및 배출함으로써, 유압구동기(50)의 신축에 따른 유량차를 보상하도록 저유탱크(10)의 작동유의 유동을 제어한다.The automatic flow compensation valve 40 is connected to the hydraulic pump 20 by connection lines 22 and 23 and sucks and discharges the working oil of the low oil tank 10, and thus the flow rate difference according to the expansion and contraction of the hydraulic actuator 50 Control the flow of the hydraulic oil of the storage tank 10 to compensate.

자동유량보상밸브(40)는 저유탱크(10)의 측면(12)에 고정된 상태에서 저유탱크(10)의 내부공간 중 일부공간을 차지하도록 내측으로 돌출되어 있다.The automatic flow compensation valve 40 protrudes inward so as to occupy a part of the inner space of the low oil tank 10 in a state fixed to the side 12 of the low oil tank 10.

이는 자동유량보상밸브(40)가 저유탱크(10)에 의해 보호될 수 있도록 저유탱크(10)의 내부에서 작동유에 둘러싸인 상태로 설치되는 것이고, 일부분만 저유탱크(10)의 측면(12)에 고정되어 연결라인(22,23)과 연결이 이루어지도록 한다.This is the automatic flow compensation valve 40 is installed in a state surrounded by the working oil in the interior of the storage tank 10 so that it can be protected by the storage tank 10, only partially on the side 12 of the storage tank 10 It is fixed to be connected to the connection lines (22,23).

자동유량보상밸브(40)가 저유탱크(10)의 내부에 설치되는 것은 저유탱크(10)에 의해 보호받을 수 있도록 구성한 이유외에도, 자동유량보상밸브(40)로의 작동유의 신속한 출입이 가능하도록 하기 위함이다.In addition to the reason that the automatic flow compensation valve 40 is installed inside the storage tank 10 to be protected by the storage tank 10, to allow rapid entry and exit of hydraulic oil to the automatic flow compensation valve 40 It is for sake.

즉, 자동유량보상밸브(40)에서 저유탱크(10)의 작동유를 흡입하는 보상유로(41)를 짧게 형성할 수 있어, 유로의 저항이 미미하여 자동유량보상밸브(40) 내부로 작동유가 신속히 이동하도록 할 수 있고, 저유탱크(10)의 작동유의 높이를 높여 수위차에 의한 압력으로 자동유량보상밸브(40)가 작동유를 흡입시 신속히 자동유량보상밸브(40)의 내부로 유입되도록 한다.That is, since the compensation flow path 41 for sucking the working oil of the low oil tank 10 from the automatic flow compensation valve 40 can be shortly formed, the resistance of the flow path is insignificant and the working oil quickly moves into the automatic flow compensation valve 40. It is possible to increase the height of the working oil of the low oil tank 10 so that the automatic flow compensation valve 40 is rapidly introduced into the interior of the automatic flow compensation valve 40 when the hydraulic oil is sucked by pressure due to a water level difference.

도 6의 (a)는 자동유량보상밸브(40)가 저유탱크(10)의 내부공간에서 일부 공간을 차지한 상태에서 작동유의 저장높이를 나타내고, 도 6의 (b)는 자동유량보상밸브(40)가 저유탱크(10)의 외부에 설치된 경우의 작동유의 저장높이를 나타내고 있다.FIG. 6(a) shows the storage height of the hydraulic oil when the automatic flow compensation valve 40 occupies some space in the internal space of the storage tank 10, and FIG. 6(b) shows the automatic flow compensation valve 40 ) Denotes the storage height of the hydraulic oil when installed outside the low oil tank 10.

도 6의 (a)는 자동유량보상밸브(40)가 저유탱크(10)의 내부공간에서 작동유가 채워져야 할 일부 공간을 차지함으로써 작동유의 유면의 높이(h1)를 높이게 된 것이다.6(a), the automatic flow compensation valve 40 increases the height h1 of the oil level of the hydraulic oil by occupying some space to be filled with the hydraulic oil in the inner space of the storage tank 10.

자동유량보상밸브(40)가 작동유를 흡입시 보상유로(41)를 통해 유입되는 작동유는 도 6의 (a)가 도 6의 (b)보다 높은 유면으로 인한 수위차(h1-h2)로 보상유로(41)의 위치에서 상대적으로 큰 유입압력이 작용하므로, 보상유로(41)를 통해 신속히 유입이 이루어질 수 있다.When the automatic flow compensation valve 40 sucks the working oil, the working oil flowing through the compensation flow path 41 is compensated for by the water level difference (h1-h2) due to the higher oil level in Fig. 6(a) than in Fig. 6(b). Since a relatively large inflow pressure acts at the position of the flow path 41, it can be quickly flowed through the compensation flow path 41.

이러한 작용효과를 높이기 위해, 자동유량보상밸브(40)는 저유탱크(10)의 하부에 설치되어 저유탱크(10)의 유면의 아래에 위치하도록 하는 것이 바람직하다.In order to increase this effect, it is preferable that the automatic flow compensation valve 40 is installed below the oil storage tank 10 and positioned below the oil level of the oil storage tank 10.

더욱 바람직하기는, 편로드 유압실린더인 유압구동기(50)가 최대로 신장된 상태에서 저유탱크(10)에 수용된 작동유의 유면의 높이보다 더 아래에 위치하도록 하는 것이다.More preferably, the hydraulic actuator 50, which is a single-load hydraulic cylinder, is positioned to be located below the height of the oil level of the hydraulic oil accommodated in the low oil tank 10 in a state in which it is fully extended.

이는 저유탱크(10)에 수용된 작동유의 최저치에서도 자동유량보상밸브(40)가 유면의 상측으로 드러나지 않고 유면의 아래에 위치하여 자동유량보상밸브(40)의 전체 부피가 유면을 높이도록 항상 유지함으로써, 보상유로(41)로 흡입시 유입압력을 항상 최대치로 유지할 수 있는 것이다.This is because the automatic flow rate compensation valve 40 is located at the lower side of the oil level without being exposed to the upper side of the oil level even at the lowest value of the working oil accommodated in the low oil tank 10 so that the entire volume of the automatic flow rate compensation valve 40 increases the oil level. , It is possible to always maintain the maximum inlet pressure when inhaling with the compensation flow path (41).

전술한 본 실시예의 유압작동시스템은, 자동유량보상밸브(40)와 그것에 연결된 연결라인(22,23) 등이 저유탱크(10)의 외측에서 외부로의 노출을 최소화하여 컴팩트(compact)한 구성을 이루고 있다.The hydraulic operation system of the present embodiment described above, the automatic flow compensation valve 40 and the connection lines 22 and 23 connected thereto are configured to be compact by minimizing exposure from the outside of the low oil tank 10 to the outside. Is fulfilling.

또한, 저유탱크(10)의 측면(12)에 고정된 커플링블록(60)의 전단부에 유압펌프(20) 및 펌프보호커버(25)가 결합되고, 커플링블록(60)의 후단부에 전동모터(30)가 결합되도록 구성하며, 커플링블록(60)의 내부에서 유로를 형성함으로써, 저유탱크(10)의 측방에서 전체적인 구성이 컴팩트하게 이루어지도록 하고 현장에서 설치가 용이한 단위모듈로서의 역할을 하게 한다.In addition, the hydraulic pump 20 and the pump protection cover 25 are coupled to the front end of the coupling block 60 fixed to the side 12 of the low oil tank 10, and the rear end of the coupling block 60 The electric motor 30 is configured to be coupled to, and by forming a flow path inside the coupling block 60, the entire configuration is made compactly on the side of the low oil tank 10 and the unit module is easy to install in the field. It serves as a role.

또한, 자동유량보상밸브(40)가 저유탱크(10)의 내부공간 중 일부공간을 차지하도록 내측으로 돌출되도록 설치함으로써, 보상유로(41)를 통한 작동유의 신속한 출입이 이루어질 수 있도록 하고, 저유탱크(10)의 작동유의 수위를 높여 보상유로(41)로 유입시 매우 신속하고 원활하게 유입될 수 있는 수위압력을 제공할 수 있다.In addition, by installing the automatic flow compensation valve 40 so as to protrude inward so as to occupy a part of the internal space of the oil storage tank 10, it is possible to quickly enter and exit the working oil through the compensation flow path 41, and the oil storage tank By increasing the level of the working oil of (10) it can provide a water level pressure that can be introduced very quickly and smoothly when flowing into the compensation flow path (41).

이상에서 본 발명의 바람직한 실시예를 설명하였으나, 상기의 실시예는 본 발명의 기술적 사상의 범위 내에 있는 일 실시예에 불과하며, 동업계의 통상의 기술자에 있어서는, 본 발명의 기술적인 사상 내에서 다른 변형된 실시가 가능함은 물론이다.Although the preferred embodiments of the present invention have been described above, the above embodiments are only one embodiment within the scope of the technical spirit of the present invention, and those skilled in the art within the technical spirit of the present invention. Of course, other modified implementations are possible.

10; 저유탱크 17; 주입구
20; 유압펌프 22,23; 연결라인
25; 펌프보호커버 27a; 제1구획영역
27b; 제2구획영역 30; 전동모터
40; 자동유량보상밸브 41; 보상유로
46a; 제2파일럿관 46b; 제1파일럿관
47a; 제1전환밸브부 47b; 제2전환밸브부
50; 유압구동기 51; 피스톤
52; 피스톤로드 54a; 실린더일측공간
54b; 실린더타측공간 60; 커플링블록
60a; 전면 60b; 후면
62,63; 제1 및 제2포트 65; 브라켓
66,67; 제1 및 제2내부유로10; Storage tank 17; Inlet
20; Hydraulic pump 22,23; Connection line
25; Pump protective cover 27a; Area 1
27b; Second compartment 30; Electric motor
40; Automatic flow compensation valve 41; Compensation
46a; Second pilot tube 46b; Pilot tube 1
47a; A first switching valve unit 47b; Second switching valve
50; Hydraulic actuator 51; piston
52; Piston rod 54a; Cylinder side space
54b; Cylinder side space 60; Coupling block
60a; Front 60b; back side
62,63; First and second ports 65; Brackets
66,67; First and second internal flow paths

Claims (4)

박스형상의 저유탱크(10)와,
상기 저유탱크(10)에 고정된 유압펌프(20)와,
상기 유압펌프(20)와 결합되어 상기 유압펌프(20)를 구동시키는 전동모터(30)와,
상기 유압펌프(20)와 상기 저유탱크(10)를 연결하여 상기 유압펌프(20)가 유압구동기(50)를 구동시, 상기 유압구동기(50)의 신축에 따른 유량차를 보상하도록 상기 저유탱크(10)의 작동유의 유동을 제어하는 자동유량보상밸브(40)를 포함하는 유압작동시스템에 있어서,
상기 자동유량보상밸브(40)는,
상기 저유탱크(10)에 고정된 상태에서 상기 저유탱크(10)의 내부공간 중 일부공간을 차지하도록 내측으로 돌출되고,
상기 유압펌프(20)와 상기 전동모터(30)는 커플링블록(60)에 의해 서로 결합되는 것으로, 상기 커플링블록(60)의 전면(60a)에 상기 유압펌프(20)가 고정되고 후면(60b)에 상기 전동모터(30)가 고정되며,
상기 커플링블록(60)이 상기 저유탱크(10)의 측면(12)에 고정됨으로써 상기 유압펌프(20)가 상기 저유탱크(10)의 측면(12)에 고정되는 것이고,
상기 커플링블록(60)에 상기 유압펌프(20)를 감싸 보호하는 펌프보호커버(25)가 결합되고,
상기 커플링블록(60)에는
상기 유압구동기(50)와 연결되어 작동유가 출입하는 제1 및 제2포트(62,63)와,
내부에 형성되어 상기 제1 및 제2포트(62,63)를 상기 유압펌프(20)와 각각 연결하는 제1 및 제2내부유로(66,67)를 포함하며,
상기 유압펌프(20)와 상기 자동유량보상밸브(40)를 연결하여 작동유가 출입하는 연결라인(22,23)은, 상기 펌프보호커버(25)의 내부공간를 통해 연장되면서 상기 펌프보호커버(25)와 상기 저유탱크(10)가 서로 대향하는 영역에 배치되는 것을 특징으로 하는 유압작동시스템Box-shaped low oil tank (10),
The hydraulic pump 20 fixed to the low oil tank (10),
An electric motor 30 coupled to the hydraulic pump 20 to drive the hydraulic pump 20,
When the hydraulic pump 20 drives the hydraulic actuator 50 by connecting the hydraulic pump 20 and the low oil tank 10, the low oil tank so as to compensate for a difference in flow rate due to the expansion and contraction of the hydraulic actuator 50. In the hydraulic operating system including an automatic flow compensation valve 40 for controlling the flow of the hydraulic oil of (10),
The automatic flow compensation valve 40,
While being fixed to the oil storage tank 10, protrudes inward to occupy a part of the internal space of the oil storage tank 10,
The hydraulic pump 20 and the electric motor 30 are coupled to each other by a coupling block 60, the hydraulic pump 20 is fixed to the front 60a of the coupling block 60 and the rear The electric motor 30 is fixed to (60b),
The coupling block 60 is fixed to the side 12 of the low oil tank 10 so that the hydraulic pump 20 is fixed to the side 12 of the low oil tank 10,
A pump protection cover 25 that wraps and protects the hydraulic pump 20 is coupled to the coupling block 60,
The coupling block 60 is
First and second ports (62, 63) connected to the hydraulic actuator (50) to access hydraulic oil,
It is formed inside and includes first and second internal flow passages 66 and 67 connecting the first and second ports 62 and 63 with the hydraulic pump 20, respectively.
The hydraulic pump 20 and the automatic flow compensation valve 40 to connect the hydraulic oil is connected to the connecting line (22,23), the pump protection cover 25 while extending through the inner space of the pump protection cover (25) ) And the low oil tank (10) is a hydraulic operation system, characterized in that arranged in the area facing each other 제1항에 있어서,
상기 자동유량보상밸브(40)는 상기 저유탱크(10)의 하부에 설치되어 상기 저유탱크(10)의 유면의 아래에 위치하는 것을 특징으로 하는 유압작동시스템According to claim 1,
The automatic flow compensation valve 40 is installed in the lower portion of the low oil tank (10), the hydraulic operating system, characterized in that located below the oil level of the low oil tank (10) 제1항 또는 제2항에 있어서,
상기 유압구동기(50)는 편로드 유압실린더이고,
상기 자동유량보상밸브(40)는, 상기 저유탱크(10)의 하부에 설치되어 상기 유압실린더가 최대로 신장된 상태에서 상기 저유탱크(10)에 수용된 작동유의 유면의 높이보다 더 아래에 위치하는 것을 특징으로 하는 유압작동시스템The method according to claim 1 or 2,
The hydraulic actuator 50 is a single rod hydraulic cylinder,
The automatic flow compensation valve 40 is installed below the storage tank 10 and is located below the height of the oil level of the working oil accommodated in the storage tank 10 in a state where the hydraulic cylinder is extended to the maximum. Hydraulic operating system, characterized in that 삭제delete
KR1020190011579A 2019-01-30 2019-01-30 Hydraulic actuation system having efficient installation structure of autoamtic flow compensation valve KR102137402B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020190011579A KR102137402B1 (en) 2019-01-30 2019-01-30 Hydraulic actuation system having efficient installation structure of autoamtic flow compensation valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020190011579A KR102137402B1 (en) 2019-01-30 2019-01-30 Hydraulic actuation system having efficient installation structure of autoamtic flow compensation valve

Publications (1)

Publication Number Publication Date
KR102137402B1 true KR102137402B1 (en) 2020-07-24

Family

ID=71892534

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020190011579A KR102137402B1 (en) 2019-01-30 2019-01-30 Hydraulic actuation system having efficient installation structure of autoamtic flow compensation valve

Country Status (1)

Country Link
KR (1) KR102137402B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950025278A (en) * 1994-02-08 1995-09-15 여주성 Hydraulic generator with hydraulic control valve
KR20060084364A (en) * 2005-01-19 2006-07-24 카야바 고교 가부시기가이샤 Hydraulic controller and hydraulic drive unit provided with said hydraulic controller
KR101577744B1 (en) * 2015-05-12 2015-12-15 주식회사 에프피씨 Electro hydrostatic actuator system with unpressurized variable volume closed reservoir
KR101694889B1 (en) * 2016-06-30 2017-01-10 박성환 hydraulic circuit system of electro hydrostatic actuator using bidirectional gear pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950025278A (en) * 1994-02-08 1995-09-15 여주성 Hydraulic generator with hydraulic control valve
KR20060084364A (en) * 2005-01-19 2006-07-24 카야바 고교 가부시기가이샤 Hydraulic controller and hydraulic drive unit provided with said hydraulic controller
KR101577744B1 (en) * 2015-05-12 2015-12-15 주식회사 에프피씨 Electro hydrostatic actuator system with unpressurized variable volume closed reservoir
KR101694889B1 (en) * 2016-06-30 2017-01-10 박성환 hydraulic circuit system of electro hydrostatic actuator using bidirectional gear pump

Similar Documents

Publication Publication Date Title
JP6053828B2 (en) Hydraulic system of work machine
CA2313943C (en) Hydraulic system, manifold and volumetric compensator
US7788918B2 (en) Hydraulic circuit for actuation of a hydraulic working cylinder
KR100597531B1 (en) Telescoping system with multi-stage telescopic cylinder
US20110088798A1 (en) Stack valve having bucket parallel movement function
EP3255284A1 (en) Flow control valve for construction machine
KR102137402B1 (en) Hydraulic actuation system having efficient installation structure of autoamtic flow compensation valve
US5107875A (en) Apparatus for flushing of hydraulic pipe systems or the like
US6868672B2 (en) Method of controlling a swinging boom and apparatus for controlling the same
KR101694889B1 (en) hydraulic circuit system of electro hydrostatic actuator using bidirectional gear pump
WO2014057746A1 (en) Cylinder driving device
EP3795752B1 (en) Hydraulic breaker provided with automatic lubricant supply structure
US7017470B2 (en) Flow control apparatus for construction heavy equipment
US20100065135A1 (en) Controlling device for hydraulic consumers
JP2009228706A (en) Impact pressure absorbing device of hydraulic control device, injection control circuit of injection device including the impact pressure absorbing device, and clamping control circuit of clamping device including the impact pressure absorbing device
KR102157152B1 (en) Booster pump with immersion water shield
JP2017150655A (en) Hydraulic system
US20110072962A1 (en) Self-bleeding double action hydraulic cylinder
CN111492146A (en) Fluid pressure driving device
JP6247573B2 (en) Hydraulic actuator
KR100470801B1 (en) Attachments for hydraulic excavators and hydraulic units used therein
JP4672162B2 (en) Hydraulic unit
JP4823197B2 (en) Power unit and lifting platform lifting device
JP7041419B2 (en) Time delay valve and flow controller
JP2021075080A (en) Washer tank device

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant