KR101110287B1 - A spool for hydraulic servo valve - Google Patents

A spool for hydraulic servo valve Download PDF

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Publication number
KR101110287B1
KR101110287B1 KR1020100101020A KR20100101020A KR101110287B1 KR 101110287 B1 KR101110287 B1 KR 101110287B1 KR 1020100101020 A KR1020100101020 A KR 1020100101020A KR 20100101020 A KR20100101020 A KR 20100101020A KR 101110287 B1 KR101110287 B1 KR 101110287B1
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South Korea
Prior art keywords
spool
port
fluid
flow path
output
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KR1020100101020A
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Korean (ko)
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조재문
김문주
윤주한
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한국도키멕유공압 주식회사
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Priority to KR1020100101020A priority Critical patent/KR101110287B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—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
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Servomotors (AREA)

Abstract

PURPOSE: A spool for a hydraulic servo valve is provided to prevent a fluid force generated and ensure a stable operation because fluid naturally moves along a spiral flow path. CONSTITUTION: A spool(105) for a hydraulic servo valve has a flow path(120) on the outer surface thereof. The flow path includes a forward flow path(123) and a reverse flow path(127). The forward flow path has a forward input groove(121) connected from an input port to a conversion port and a forward output groove(122) connected from the conversion port to an output port. The reverse flow path has a reverse input groove(125) connected from the input port to the conversion port and a reverse output groove(126) connected from the conversion port to the output port.

Description

유압서보밸브용 스풀{A SPOOL FOR HYDRAULIC SERVO VALVE}Spool for Hydraulic Servo Valve {A SPOOL FOR HYDRAULIC SERVO VALVE}

본 발명은 유압서보밸브용 스풀에 관한 것으로서 더욱 상세하게는 유압회로를 형성하여 유체가 이동할 때 유체의 이동에 의하여 발생하는 유체력을 배제하여 스풀로 전도되는 충격을 배제할 수 있도록 한 것이다.The present invention relates to a spool for a hydraulic servo valve, and more particularly, to form a hydraulic circuit to exclude the fluid force generated by the movement of the fluid when the fluid moves to exclude the shock conducted to the spool.

일반적으로, 유압 제어 장치는 무거운 하중의 신속하고 정확한 위치제어를 위하여 사용되며, 전자제어와 유압동력의 이점을 모두 얻을 수 있는 전자와 유압을 결합한 시스템이 널리 이용되고 있다.In general, the hydraulic control device is used for the rapid and accurate position control of heavy loads, and a combination of electronic and hydraulic systems that can take advantage of both electronic control and hydraulic power is widely used.

상기와 같이 유압을 이용하여 속도와 위치를 제어하는 유압실린더 또는 유압모터를 이용하게 되며, 우주항공산업에서부터 일반적인 산업분야에까지 널리 적용되고 있으며, 이와 같이 유압실린더와 유압모터의 속도와 방향 등을 정확하고 정밀하게 제어할 수 있도록 하는 것이 유압서보밸브이다.As described above, a hydraulic cylinder or a hydraulic motor that controls speed and position by using hydraulic pressure is used, and is widely applied to aerospace and general industrial fields. Thus, the speed and direction of the hydraulic cylinder and the hydraulic motor are precisely determined. Hydraulic servovalves allow precise and precise control.

상기와 같은 유압서보밸브는, 유입 및 배출유로를 가지는 밸브바디의 내부에 유체(오일)의 이동 경로를 결정하기 위한 슬리브와 스풀이 내장된다.The hydraulic servo valve as described above includes a sleeve and a spool for determining a moving path of the fluid (oil) in the valve body having the inflow and outflow passages.

상기 스풀은 밸브바디의 일측에 결합 되는 리니어액추에이터에 의하여 좌우 방향(스풀의 축 방향)으로 움직이게 된다.The spool is moved in the left and right directions (axial direction of the spool) by a linear actuator coupled to one side of the valve body.

상기 리니어액추에이터는 요크 내부에 코일을 권선하여 보빈을 삽입한 코일조립체와, 보빈의 내부에는 자력보강을 위한 마그네트링을 개재하고, 마그네트링의 내부 횡 방향으로는 플런저가 삽입되어 입력신호로서 전류가 코일에 인가되면, 아마츄어에 발생하는 자극과 함께 마그네트링의 자력에 의하여 플런저가 축 방향으로 움직이면서 스풀을 작동시키게 된다.The linear actuator has a coil assembly in which a bobbin is inserted by winding a coil in the yoke, and a magnet ring for reinforcing magnetic force is inserted in the bobbin, and a plunger is inserted in the inner transverse direction of the magnet ring so that a current is inputted as an input signal. When applied to the coil, the magnetic force of the magnet ring together with the magnetic pole generated in the armature causes the plunger to move in the axial direction to operate the spool.

이와 같이 코일에 인가되는 전류의 차이에 의하여 플런저의 움직이는 방향이 달라지게 됨으로써, 유압회로를 결정하게 되는 스풀의 위치를 결정하게 되는 것이다.As such, the moving direction of the plunger is changed by the difference in the current applied to the coil, thereby determining the position of the spool which determines the hydraulic circuit.

상기 스풀에는 밸브바디로부터 유입된 유체가 들어오고 나갈 때 밸브바디의 유입 및 배출유로과 유압회로를 구성할 수 있도록 다수개의 유로를 형성하고 있으며, 종래의 유로는 도 6,7에 도시된 바와 같다.In the spool, a plurality of flow paths are formed to configure the inflow and discharge flow paths of the valve body and the hydraulic circuit when the fluid flowing from the valve body enters and exits, and the conventional flow path is shown in FIGS. 6 and 7.

종래기술이 적용되는 유압서보밸브는 슬리브(1)의 중앙에 형성되는 입력포트(P)를 통하여 유체가 입력된 후 스풀(2)의 움직임에 따라 방향을 결정하기 위한 전환포트(A,B)를 거친 후 출력포트(TA, TB)를 통하여 유체가 출력될 수 있도록 한다.Hydraulic servo valve to which the prior art is applied is a switching port (A, B) for determining the direction according to the movement of the spool (2) after the fluid is input through the input port (P) formed in the center of the sleeve (1) After passing through the fluid to be output through the output ports (TA, TB).

상기 출력포트(TA, TB)를 통하여 유체가 출력되는 것을 선택할 수 있도록 스풀(2)에는, 양단과 중앙에는 스풀(2)이 중립위치에 있을 때 입력포트(P), 전환포트(A,B) 및 출력포트(TA, TB) 모두를 차단할 수 있도록 대직경의 차단림(3)을 형성하고, 상기 차단림(3) 사이는 소직경의 유로(5)를 형성하여 구성된다.In the spool 2, at both ends and in the center, the spool 2 is in the neutral position so that the fluid can be output through the output ports TA and TB. ) And a large diameter blocking rim 3 so as to block both the output ports TA and TB, and a small diameter flow path 5 is formed between the blocking rims 3.

상기와 같이 밸브바디와 스풀이 형성하는 유압회로로 유체가 이동할 때 스풀에 형성된 유로가 유체가 흐르는 방향에 대하여 저항을 받을 수 있는 형상으로 구성됨으로서 유체가 유로의 벽면에 부딪칠 때 상당한 충격과 유체력이 발생하게 된다.As described above, when the fluid moves to the hydraulic circuit formed by the valve body and the spool, the flow path formed in the spool is configured to be resistant to the direction in which the fluid flows. Health will develop.

이러한 유체력은 스풀에 좋지 않은 영향을 미치게 되는 데 유압회로로 초기에 유체가 이동할 때 유로의 벽면과 부딪침으로써 스풀을 유체가 흐르는 방향으로 이동시키는 결과를 가져온다.This fluid force adversely affects the spool. When the fluid initially moves into the hydraulic circuit, the fluid force collides with the wall surface of the flow path, resulting in moving the spool in the direction in which the fluid flows.

이와 같이 유체력에 의하여 스풀이 유체가 흐르는 방향으로 이동할 경우에는 원하지 않는 방향으로 유체가 누출되는 현상이 발생하게 되므로 대상체로 유압을 정확하게 공급하는 것이 불가능하게 되므로 정밀한 제어를 어렵게 하는 원인이 된다.As such, when the spool moves in the direction in which the fluid flows due to the fluid force, the fluid leaks in an undesired direction. Therefore, it is impossible to accurately supply the hydraulic pressure to the object, which makes precise control difficult.

상기 유로와 차단림이 경계부위가 직각형태로 구성되어 유체력이 발생하는 것을 완화시킬 수 있도록 유로와 차단림이 만나는 부위에 라운드를 주어 충격을 감소시킬 수 있도록 구성하고 있다.The flow path and the blocking rim are configured to reduce the impact by giving a round to the area where the flow path and the blocking rim meet so that the boundary portion is formed at a right angle to mitigate the occurrence of the fluid force.

이 경우에도 일부 유체력을 저감시킬 수는 있으나 유체력 발생 자체를 배제할 수 없기 때문에 스풀의 미세한 이동이 일어나 원하지 않는 방향으로의 유체 누출로 인한 제어상태가 좋지 않게 되는 등 여러 문제점이 발생하고 있는 실정이다.Even in this case, some fluid force can be reduced, but since the generation of fluid force itself cannot be excluded, there are various problems such as minute movement of the spool, resulting in poor control state due to fluid leakage in an undesired direction. It is true.

이에 본 발명에서는 상기와 같은 문제점들을 해결하기 위하여 발명한 것으로서 스풀에 형성되는 유로를 나선형으로 구성하여 유체가 자연스럽게 흐르면서 이동할 수 있도록 함으로서 유압회로를 통하여 유체 이동시 유체력의 발생을 배제하여 스풀의 작동에 악영향을 미치지 않고 안정된 상태의 작동성을 보장할 수 있도록 하는 특징을 가진다.Accordingly, the present invention is to solve the above problems as a spiral configuration of the flow path formed in the spool to allow the fluid to flow naturally flow by excluding the generation of fluid force during the fluid movement through the hydraulic circuit to the operation of the spool It is characterized by ensuring stable operation without adverse effects.

본 발명은 스풀에 형성되는 유로를 나선형으로 구성하여 유체가 자연스럽게 이동하도록 함으로서 유체력 발생을 배제하여 안정된 상태의 작동성을 보장하여 유압서보밸브의 품질을 높이고 대외적인 경쟁력의 우위에 있을 수 있는 등 다양한 효과를 가지는 발명이다.The present invention is to configure the flow path formed in the spool spirally so that the fluid moves smoothly by eliminating the generation of the fluid force to ensure the stable operation of the state to improve the quality of the hydraulic servo valve and have an advantage of the external competitiveness, etc. The invention has various effects.

도 1은 본 발명의 기술이 적용된 유압서보밸브를 도시한 외관 사시도.
도 2는 본 발명의 기술이 적용된 유압서보밸브를 도시한 단면상태의 구성도.
도 3은 본 발명의 기술이 적용된 유압서보밸브용 스풀을 발췌하여 도시한 사시도.
도 4는 본 발명의 기술이 적용된 유압서보밸브용 스풀의 유압회로가 차단된 상태의 단면도.
도 5는 본 발명의 기술이 적용된 유압서보밸브용 스풀의 유압회로가 개방된 상태의 단면도.
도 6은 종래 기술이 적용된 유압서보밸브용 스풀의 1예를 도시한 단면도.
도 7은 종래 기술이 적용된 유압서보밸브용 스풀에서 유압회로가 개방된 상태도.1 is an external perspective view showing a hydraulic servo valve to which the technique of the present invention is applied.
Figure 2 is a configuration of the cross-sectional view showing a hydraulic servo valve to which the technique of the present invention is applied.
Figure 3 is a perspective view showing an extract of the spool for the hydraulic servo valve to which the technique of the present invention is applied.
Figure 4 is a cross-sectional view of the hydraulic circuit of the spool for the hydraulic servo valve to which the technique of the present invention is applied.
5 is a cross-sectional view of an open hydraulic circuit of the spool for the hydraulic servo valve to which the technique of the present invention is applied.
6 is a cross-sectional view showing one example of a spool for a hydraulic servo valve to which the prior art is applied.
7 is a state in which the hydraulic circuit is opened in the spool for the hydraulic servo valve to which the prior art is applied.

이하 첨부되는 도면과 관련하여 상기 목적을 달성하기 위한 본 발명의 바람직한 구성과 작용에 대하여 설명하면 다음과 같다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 기술이 적용된 유압서보밸브를 도시한 외관 사시도, 도 2는 본 발명의 기술이 적용된 유압서보밸브를 도시한 단면상태의 구성도, 도 3은 본 발명의 기술이 적용된 유압서보밸브용 스풀을 발췌하여 도시한 사시도, 도 4는 본 발명의 기술이 적용된 유압서보밸브용 스풀의 유압회로가 차단된 상태의 단면도, 도 5는 본 발명의 기술이 적용된 유압서보밸브용 스풀의 유압회로가 개방된 상태의 단면도로서 함께 설명한다.1 is an external perspective view showing a hydraulic servo valve to which the technique of the present invention is applied, FIG. 2 is a configuration diagram of a cross-sectional view showing a hydraulic servo valve to which the technique of the present invention is applied, and FIG. 3 is a hydraulic servo to which the technique of the present invention is applied. Figure 4 is a perspective view showing an extract of the valve spool, Figure 4 is a cross-sectional view of the hydraulic circuit of the hydraulic servo valve spool applied to the technique of the present invention, Figure 5 is a hydraulic pressure of the hydraulic servo valve spool to which the technique of the present invention is applied It demonstrates together as sectional drawing of an open state of a circuit.

통상적인 유압서보밸브(100)는 밸브바디(103)의 내부에 유체(오일)의 이동 경로를 결정하기 위한 슬리브(104)와 스풀(105)이 내장되고, 상기 스풀(105)은 밸브바디(103)의 일측에 결합 되는 리니어액추에이터(106)에 의하여 좌우 방향으로 움직이면서 유압회로를 결정하게 된다.Conventional hydraulic servo valve 100 has a sleeve 104 and the spool 105 for determining the movement path of the fluid (oil) inside the valve body 103, the spool 105 is a valve body ( The hydraulic actuator is determined while moving in the left and right direction by the linear actuator 106 coupled to one side of the 103.

상기 리니어액추에이터(106)는 프론트 및 리어코어튜브(107,108) 사이에 요크(109) 내부에 코일(110)을 권선하여 보빈(111)으로 구성되는 코일조립체(112)를 삽입하고, 상기 보빈(111)의 내부에는 자력보강을 위한 마그네트링(113)을 코어캡(114)으로 유지되도록 한다.The linear actuator 106 winds the coil 110 inside the yoke 109 between the front and rear core tubes 107 and 108 to insert a coil assembly 112 composed of bobbins 111 and the bobbin 111. Inside) to maintain the magnet ring 113 for the magnetic reinforcement to the core cap (114).

상기 코어캡(113) 내부에는 횡 방향으로는 플런저(115)를 삽입하여 내측단이 스풀(105)과 연결된 상태에서 입력신호로서 전류가 코일(110)에 인가되면, 코일조립체(112)에 발생하는 자극과 함께 마그네트링(113)의 자력에 의하여 플런저(115)가 축 방향으로 움직이면서 스풀(105)을 작동시켜 유압회로(유로)를 형성하도록 한다.When the current is applied to the coil 110 as an input signal in the state in which the inner end is connected to the spool 105 by inserting the plunger 115 in the horizontal direction inside the core cap 113, the coil assembly 112 is generated. The plunger 115 moves in the axial direction by the magnetic force of the magnet ring 113 together with the magnetic pole to operate the spool 105 to form a hydraulic circuit (euro).

상기 스풀(105)의 외측단에는 리니어액추에이터(106)의 구동에 따른 변위를 자속에 의해 코일 전압으로 변위를 측정하는 LVDT(Linear Variable Differential Transformer,116)를 결합하여 구성된다.The outer end of the spool 105 is configured by combining a linear variable differential transformer (LVDT) 116 that measures the displacement according to the coil voltage by the magnetic flux displacement according to the drive of the linear actuator 106.

상기 슬리브(104)의 중앙에는 입력포트(P)가 형성되어 유체가 입력된 후 스풀(105)의 움직임에 따라 방향을 결정하기 위한 전환포트(A,B) 및 대상체로 유체를 공급하기 위한 출력포트(TA, TB)가 형성되고, 상기 출력포트(TA, TB)를 통하여 유체가 출력되는 것을 선택할 수 있도록 스풀(105)에는 유로(120)를 형성한다.An input port P is formed at the center of the sleeve 104 so that the fluid is input, the switching ports A and B for determining the direction according to the movement of the spool 105 and the output for supplying the fluid to the object. Ports TA and TB are formed, and a flow path 120 is formed in the spool 105 so that the fluid can be selected to be output through the output ports TA and TB.

본 발명에서는 상기 스풀(105)에 형성되는 유로(120)를 개선하여, 슬리브(104)에 형성되는 입력포트(P)와 전환포트(A,B) 및 출력포트(TA, TB)로 유체가 이동할 때 유체력 발생을 배제하여 스풀(105)의 안정성과 더불어 원활한 작동성을 보장할 수 있도록 하는 것을 특징으로 한다.In the present invention, by improving the flow path 120 formed in the spool 105, the fluid flows into the input port (P), the switching port (A, B) and the output port (TA, TB) formed in the sleeve 104 It is characterized in that it is possible to ensure the smooth operation and stability of the spool 105 by excluding the generation of fluid force when moving.

이를 위하여 상기 유로(120)를 스풀(105)의 표면에 일측에서 다른측으로 나선형으로 연결되도록 형성하고, 스풀(105) 표면 전체를 감아 도는 형태보다는 스풀(105)의 반경 범위 내에 형성되도록 하는 것이 바람직할 것이다.To this end, it is preferable that the flow path 120 is formed to be helically connected from one side to the other side of the surface of the spool 105, and to be formed within a radius range of the spool 105 rather than winding the entire surface of the spool 105. something to do.

상기 유로(120)는 스풀(105)의 표면에 요입 되게 형성하고, 입력포트(P)에서 전환포트(A)로 연결되는 정방향입력홈(121)과 전환포트(B)에서 출력포트(TB)를 연결되는 정방향출력홈(122)으로 구성되는 정방향유로(123)와, 입력포트(P)에서 전환포트(B)로 연결되는 역방향입력홈(125)과 전환포트(A)에서 출력포트(TA)로 연결되는 역방향출력홈(126)으로 구성되는 역방향유로(127)로 구성한다.The flow path 120 is formed to be concave on the surface of the spool 105, the forward input groove 121 and the output port TB connected from the input port (P) to the switching port (A). Forward flow path 123 consisting of a forward output groove 122 is connected to the input port (P) from the reverse input groove 125 and the switching port (A) connected to the output port (TA) It consists of a reverse flow path 127 consisting of a reverse output groove 126 is connected to.

상기 정방향유로(123)와 역방향유로(127)는 동일한 위치에 형성하지 않고, 예를 들어 스풀(105)의 정면에 정방향유로(123)를 형성한 경우에는 스풀(105)의 배면에는 역방향유로(127)를 형성하여 유체가 서로 간섭되는 현상이 없도록 함은 당연할 것이다.The forward flow passage 123 and the reverse flow passage 127 are not formed at the same position. For example, when the forward flow passage 123 is formed in front of the spool 105, the reverse flow passage (back) of the spool 105 is formed. It will be apparent that the 127 is formed so that the fluids do not interfere with each other.

상기와 같은 본 발명의 기술이 적용된 유압서보밸브(100)용 스풀(105)이 작동하여 유로를 형성하는 과정을 살펴보면 다음과 같다.Looking at the process of forming the flow path by operating the spool 105 for the hydraulic servo valve 100 to which the technique of the present invention is applied as described above are as follows.

스풀(105)이 중립위치에 있을 경우에는, 정방향유로(123)를 구성하는 정방향입력홈(121)과 역방향유로(127)를 형성하는 역방향입력홈(125)이 입력포트(P)와 연결되지 않은 상태에 있게 되므로 유체가 입력되지 않게 된다.When the spool 105 is in the neutral position, the forward input groove 121 constituting the forward flow passage 123 and the reverse input groove 125 forming the reverse flow passage 127 are not connected to the input port P. It will be in an inactive state, so no fluid will enter.

이 경우에는 정방향출력홈(122)과 역방향출력홈(126)이 전환포트(A, B)와 연결된 상태에 있더라도, 정방향출력홈(122)과 역방향출력홈(126)이 출력포트(TA, TB)와는 연결되지 않은 상태이므로 유체의 출력이 없는 상태가 된다.In this case, even when the forward output groove 122 and the reverse output groove 126 are connected to the switching ports A and B, the forward output groove 122 and the reverse output groove 126 are output ports TA and TB. ) Is not connected, so there is no fluid output.

그리고, 스풀(105)이 리니어액추에이터(106)에 의하여 정방향 또는 역방향으로 움직일 경우에는 입력포트(P)와 정방향입력홈(121) 또는 역방향입력홈(125)이 연결되어 유체가 스풀(105)의 표면을 따라 나선형으로 이동하여 전환포트(A, B)로 이동하고, 다시 전환포트(A, B)를 통하여 정방향출력홈(122)과 역방향출력홈(126)으로 방향으로 전환한 후 해당 출력포트(TA, TB)로 유체를 출력하게 되는 것이다.When the spool 105 moves in the forward or reverse direction by the linear actuator 106, the input port P and the forward input groove 121 or the reverse input groove 125 are connected to each other so that the fluid is connected to the spool 105. Spirally move along the surface to the switching port (A, B), and then switch to the forward output groove 122 and the reverse output groove 126 through the switching port (A, B) in the corresponding output port It will output fluid to (TA, TB).

이와 같이 유체가 입력된 후 출력되는 과정에서 스풀(105)의 표면에 나선형으로 형성된 유로(120)를 따라 자연스럽게 이동하는 형태가 되므로, 유체의 압력이 유로(120)에 과격하게 전달되는 것이 방지되므로 스풀(105)이 의도하지 않게 이동하여 유체가 누출되는 등의 현상이 없게 되는 것이다.In this way, since the fluid is naturally input along the flow path 120 spirally formed on the surface of the spool 105 in the process of being inputted and outputted, the pressure of the fluid is prevented from being transmitted to the flow path 120 radically. The spool 105 is moved inadvertently so that there is no phenomenon such as leakage of the fluid.

100; 유압서보밸브
104; 슬리브
105; 스풀
115; 플런저
120; 유로
123; 정방향유로
127; 역방향유로
P; 입력포트
A, B; 전환포트
TA, TB; 출력포트100; Hydraulic Servo Valve
104; sleeve
105; spool
115; plunger
120; Euro
123; Forward Euro
127; Reverse flow path
P; Input port
A, B; Conversion port
TA, TB; Output port

Claims (3)

유압서보밸브(100)의 슬리브(104)에는 유체가 입력되도록 형성하는 입력포트(P)와, 입력포트(P)로 입력된 유체의 출력방향을 결정하기 위한 전환포트(A,B)와, 대상체로 유체를 공급하기 위한 출력포트(TA, TB)가 형성되고;
상기 입력포트(P)로 입력된 유체가 전환포트(A, B)를 통하여 방향을 전환한 후 출력포트(TA, TB)를 통하여 유체가 출력되는 것을 선택할 수 있도록 유로(120)를 형성하고;
상기 유로(120)는 스풀(105)의 표면에 요입되게 형성하고, 일측에서 다른측으로 나선형으로 연결하여 입력포트(P)와 전환포트(A,B) 및 출력포트(TA, TB)로 유체가 이동할 때 유체력 발생을 배제하여 스풀(105)의 안정성과 더불어 원활한 작동성을 확보할 수 있도록 하는 유압서보밸브용 스풀에 있어서;
상기 유로(120)는 입력포트(P)에서 전환포트(A)로 연결되는 정방향입력홈(121)과, 전환포트(B)에서 출력포트(TB)를 연결되는 정방향출력홈(122)을 포함하는 정방향유로(123)와;
입력포트(P)에서 전환포트(B)로 연결되는 역방향입력홈(125)과, 전환포트(A)에서 출력포트(TA)로 연결되는 역방향출력홈(126)을 포함하는 역방향유로(127)로 구성하는 것을 특징으로 하는 유압서보밸브용 스풀.The sleeve 104 of the hydraulic servo valve 100 includes an input port P for forming a fluid, switching ports A and B for determining an output direction of the fluid input through the input port P, Output ports TA and TB for supplying a fluid to the object are formed;
Forming a flow path (120) so that the fluid inputted through the input port (P) is switched through the switching ports (A, B) and then the fluid is output through the output ports (TA, TB);
The flow path 120 is formed to be concave on the surface of the spool 105, the fluid is connected to the input port (P), the switching port (A, B) and the output port (TA, TB) by connecting spirally from one side to the other side In the spool for hydraulic servo valve to exclude the generation of fluid force when moving to ensure the stability and smooth operation of the spool 105;
The flow path 120 includes a forward input groove 121 connected from the input port P to the switching port A, and a forward output groove 122 connected from the switching port B to the output port TB. Forward flow path 123 and;
Reverse flow path 127 including a reverse input groove 125 connected from the input port (P) to the switching port (B), and a reverse output groove (126) connected from the switching port (A) to the output port (TA). Hydraulic servo valve spool, characterized in that consisting of. 삭제delete 제 1 항에 있어서;
상기 정방향유로(123)와 역방향유로(127)는 동일한 위치에 형성하지 않고 간섭현상이 없도록 상반된 위치에 형성하는 것을 특징으로 하는 유압서보밸브용 스풀.The method of claim 1;
The forward flow passage 123 and the reverse flow passage 127 are not formed in the same position, the hydraulic servo valve spool, characterized in that formed in the opposite position so that there is no interference phenomenon.
KR1020100101020A 2010-10-15 2010-10-15 A spool for hydraulic servo valve KR101110287B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100665350B1 (en) * 2005-11-17 2007-01-04 (주)티원엔지니어링 Directional selecting valve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100665350B1 (en) * 2005-11-17 2007-01-04 (주)티원엔지니어링 Directional selecting valve

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