KR20160062425A - Single acting hydraulic cylinder can control of the pressure of static pressure bearing - Google Patents

Single acting hydraulic cylinder can control of the pressure of static pressure bearing Download PDF

Info

Publication number
KR20160062425A
KR20160062425A KR1020140165123A KR20140165123A KR20160062425A KR 20160062425 A KR20160062425 A KR 20160062425A KR 1020140165123 A KR1020140165123 A KR 1020140165123A KR 20140165123 A KR20140165123 A KR 20140165123A KR 20160062425 A KR20160062425 A KR 20160062425A
Authority
KR
South Korea
Prior art keywords
pressure
piston
hydraulic cylinder
conduit
pockets
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
KR1020140165123A
Other languages
Korean (ko)
Inventor
서호덕
Original Assignee
서호덕
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 서호덕 filed Critical 서호덕
Priority to KR1020140165123A priority Critical patent/KR20160062425A/en
Publication of KR20160062425A publication Critical patent/KR20160062425A/en
Ceased legal-status Critical Current

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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • 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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

The present invention has a purpose to provide a single acting hydraulic cylinder capable of controlling the pressure of a hydrostatic pressure bearing which can uniformly maintain the pressure of a hydrostatic bearing formed at a piston within a single acting hydraulic cylinder. The single acting hydraulic cylinder capable of controlling the pressure of a hydrostatic pressure bearing is divided into a forwarding chamber and a backwarding chamber and comprises a piston having a plurality of pockets on a circumferential surface and valves to uniformly maintain a pressure of working fluid installed in the inside of the piston and supplied to each pocket.

Description

정압베어링의 압력제어가 가능한 단동식 유압실린더 {Single acting hydraulic cylinder can control of the pressure of static pressure bearing}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a single acting hydraulic cylinder capable of controlling the pressure of a hydrostatic bearing,

본 발명은 정압베어링의 압력제어가 가능한 단동식 유압실린더에 관한 것으로 더욱 상세하게는 피스톤 한쪽에만 유압이 작용하여 출력이 한쪽 방향으로만 발생되며, 복귀 작용은 자중이나 스프링 및 외력에 의해서 이루어지는 유압실린더의 피스톤에 형성되는 정압베어링의 제어가 가능한 단동식 유압실린더에 관한 것이다.The present invention relates to a single-acting hydraulic cylinder capable of controlling the pressure of a hydrostatic bearing. More particularly, the present invention relates to a single-acting hydraulic cylinder capable of controlling the pressure of a hydrostatic bearing. More specifically, hydraulic pressure acts on only one side of the piston, The present invention relates to a single-acting hydraulic cylinder capable of controlling a hydrostatic bearing formed on a piston of a hydraulic cylinder.

일반적으로 단동식 유압실린더(single acting hydraulic cylinder)는 피스톤 한쪽에만 유압이 작용하여 출력이 한쪽 방향으로만 발생되며, 복귀 작용은 자중이나 스프링 및 외력에 의해서 이루어지는 실린더를 말한다.Generally, a single acting hydraulic cylinder is a cylinder in which the output is generated only in one direction due to the action of hydraulic pressure on only one side of the piston, and the return action is performed by self weight, spring, and external force.

이러한 단동식 실린더는 왕복운동하는 피스톤의 외주면에 복수개의 포켓을 형성하고 각 포켓에 작동유를 공급하여 정압베어링을 형성함으로써, 피스톤을 항상 유중에 떠있는 상태를 유지하여 기계적 마찰을 방지하게 된다.Such a single acting cylinder forms a plurality of pockets on the outer circumferential surface of the reciprocating piston and supplies hydraulic oil to the respective pockets to form a static pressure bearing, thereby keeping the piston always floating in the oil, thereby preventing mechanical friction.

그런데 단동식 실린더는 피스톤이 전진하면 피스톤을 후진시키기 위한 스프링이 압축되어 탄성력(외력)으로 인해 피스톤을 전진시키기 위한 작동유의 압력이 지속적으로 상승하게 되어 피스톤 측의 정압베어링 압력이 상승하는 문제점이 발생하였다.However, in the single acting type cylinder, when the piston advances, the spring for moving the piston backward is compressed, so that the pressure of the hydraulic oil for advancing the piston due to the elastic force (external force) is continuously increased, and the pressure of the static pressure bearing on the piston side is raised Respectively.

이로 인해 로드 측의 정압베어링과 피스톤 측의 정압베어링에 힘의 불균형이 발생되어 로드 또는 피스톤에 기계적 마찰이 발생함으로써 로드와 피스톤이 손상되는 치명적인 문제점을 유발하게 되어 이를 극복하기 위한 기술이 필요한 실정이다.As a result, force imbalance occurs between the hydrostatic bearing on the rod side and the hydrostatic bearing on the piston side, causing mechanical damage to the rod or the piston, thereby causing a fatal problem of damage to the rod and the piston. .

대한민국 등록특허 제10-1176924호 (2012.08.20)Korean Registered Patent No. 10-1176924 (August 20, 2012)

본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로 단동식 유압실린더 내의 피스톤에 형성되는 정압베어링의 압력을 일정하게 유지시킬 수 있는 정압베어링의 압력제어가 가능한 단동식 유압실린더를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention provides a single acting hydraulic cylinder capable of controlling the pressure of a static pressure bearing capable of constantly maintaining a pressure of a static pressure bearing formed in a piston in a single acting hydraulic cylinder, .

상술한 본 발명의 목적은 하기에 상세히 설명할 내부를 전진챔버와 후진챔버로 구획하며 외주면에 복수개의 포켓이 형성되는 피스톤을 포함하는 단동식 유압실린더에 있어서, 상기 피스톤의 내부에 설치되어 각각의 포켓들로 공급되는 작동유의 압력을 일정하게 유지시키는 밸브를 포함하여 이루어지는 것을 특징으로 하는 정압베어링의 압력제어가 가능한 단동식 유압실린더에 의해 달성될 수 있다.The above and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: FIG. 1 is a perspective view of a single-acting hydraulic cylinder, And a valve that keeps the pressure of the hydraulic fluid supplied to the pockets constant. The pressure control of the hydrostatic bearing can be achieved by a single acting hydraulic cylinder.

상기한 바와 같이 본 발명에 따르면 다음과 같은 효과를 기대할 수 있을 것이다.As described above, according to the present invention, the following effects can be expected.

편로드 정압 베어링 실린더에서 피스톤 측의 정압베어링은 외력에 의해서 변하는 정압력을 일정하게 유지하여 로드 측의 정압베어링과 힘의 균형을 맞출 수 있는 이점이 있다. 이로 인해 편심하중을 방지하고 편하중으로 인해 발생되는 로드와 피스톤의 손상을 방지하게 됨으로써, 유압실린더의 내구성을 향상시킬 뿐만 아니라, 그 유지보수에 소모되는 비용을 절감할 수 있는 이점이 있다.In the single-rod constant-pressure bearing cylinder, the static-pressure bearing on the piston side has an advantage that the static pressure which is changed by the external force can be kept constant, thereby balancing the force with the static-pressure bearing on the rod side. This prevents the eccentric load and prevents damage to the rod and the piston caused by the offset load, thereby improving the durability of the hydraulic cylinder and reducing the cost of maintenance.

도 1은 본 발명을 종단면도로 나타낸 도면이다.
도 2는 도 1의 A-A 단면을 나타낸 도면이다.
도 3은 본 발명에 따른 밸브의 회로도이다.1 is a longitudinal sectional view showing the present invention.
2 is a view showing an AA cross section in Fig.
3 is a circuit diagram of a valve according to the present invention.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시 예를 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

설명에 앞서 본 발명은 단동식 유압실린더의 피스톤과 로드에 기계적 마찰을 방지하기 위한 정압베어링의 압력을 일정하게 유지시키기 위한 것이며, 더욱 한정되게는 단동식 편 로드 유압실린더에 최적화된 정압베어링의 압력제어에 관한 기술임을 주지하여 이해를 돕고자 한다.Prior to the description, the present invention is intended to maintain the pressure of the static pressure bearing for preventing the mechanical friction between the piston and the rod of the single acting hydraulic cylinder to be constant, and more particularly, to the pressure of the static pressure bearing optimized for the single acting single rod hydraulic cylinder It is important to note that this is a control technology.

본 발명에 따른 정압베어링의 압력제어가 가능한 단동식 유압실린더를 종단면도로 나타낸 도 1 및 상기 도 1의 A-A 단면을 나타낸 도 2에 도시된 바와 같이, 본 발명은 단동식 유압실린더의 피스톤을 유중에 떠있게 하는 정압베어링의 압력을 일정하게 유지시키기 위한 것으로 유압실린더(100), 피스톤(200) 및 밸브(300)를 포함하여 이루어진다.1 showing the single-acting hydraulic cylinder capable of controlling the pressure of the hydrostatic bearing according to the present invention and FIG. 2 showing the sectional view taken along line AA of FIG. 1, the present invention is characterized in that the piston of the single- A piston 200, and a valve 300 to maintain a constant pressure of the static pressure bearing that floats.

상기 유압실린더(100)는 단동식으로 작동되는 것으로 내부를 전진챔버(110)와 후진챔버(120)로 구획하는 피스톤(200)을 포함하여 이루어진다.The hydraulic cylinder 100 includes a piston 200 that is operated in a single operation and divides the inside of the hydraulic cylinder 100 into an advance chamber 110 and a reverse chamber 120.

자세하게 상기 유압실린더(100)는 로드(도면부호 미도시)가 길이방향으로 유압실린더(100)를 관통하여 설치되되 관통부분을 기밀 가능하게 슬라이딩할 수 있도록 설치된다. 상기 로드 상에는 피스톤(200)이 일체로 구성되어 유압실린더(100)의 내부를 전진챔버(110)와 후진챔버(120)로 구획하게 된다. 상기 로드와 피스톤(200)은 전진챔버(110)로 공급되는 작동유에 의해 전진되며 상기 유압실린더(100)의 외부에는 전진된 로드를 후진시키기 위해 외력을 발생시키는 스프링 등이 설치될 수 있다.In detail, the hydraulic cylinder 100 is installed such that a rod (not shown) penetrates the hydraulic cylinder 100 in the longitudinal direction, but slidably penetrates the penetrating portion. The piston 200 is integrally formed on the rod and divides the inside of the hydraulic cylinder 100 into an advance chamber 110 and a reverse chamber 120. The rod and the piston 200 are advanced by the hydraulic oil supplied to the advance chamber 110 and a spring for generating an external force to reverse the advanced rod may be installed outside the hydraulic cylinder 100.

이와 함께 상기 피스톤(200)의 외주면에는 외주를 따라 복수개의 포켓(250)이 형성되어 상기 전진챔버(110)에서 공급되는 작동유에 의해 정압베어링의 형성을 가능케 한다. 이와 더불어 상기 유압실린더(100)의 로드 관통부분에는 내주를 따라 복수개의 로드포켓(미도시)이 형성되어 유압실린더(100)의 외부에서 공급되는 작동유에 의해 정압베어링의 형성을 가능케 한다.In addition, a plurality of pockets 250 are formed on the outer circumferential surface of the piston 200 along the outer periphery thereof to enable the hydrostatic bearings to be formed by the hydraulic fluid supplied from the advance chamber 110. In addition, a plurality of rod pockets (not shown) are formed along the inner periphery of the rod-penetrating portion of the hydraulic cylinder 100 to enable formation of the hydrostatic bearing by hydraulic oil supplied from the outside of the hydraulic cylinder 100.

이와 같이 구성되는 상기 피스톤(200)의 포켓(250)에 형성되는 정압베어링의 압력제어를 구현하기 위해 상기 피스톤(200)의 내부에는 각각의 포켓(250)들로 공급되는 작동유의 압력을 일정하게 유지시키는 밸브(300)가 설치된다.
In order to realize the pressure control of the static pressure bearing formed on the pockets 250 of the piston 200 constructed as above, the pressure of the hydraulic oil supplied to the respective pockets 250 is constantly maintained in the piston 200 A valve 300 is provided for holding the valve 300.

여기에서 상기한 도면들과 본 발명에 따른 밸브의 회로도를 나타낸 도 3을 참조하여 상기 피스톤(200)의 내부구조와 밸브(300)를 상세히 설명하면 다음과 같다.Hereinafter, the internal structure of the piston 200 and the valve 300 will be described in detail with reference to FIG. 3 showing a circuit diagram of the valve according to the present invention.

상기 피스톤(200)의 내부에는 전측챔버(110)와 연통되는 제1 관로(210)와 상기 각각의 포켓(250)과 연통되는 제2 관로(220) 및 상기 후측챔버(120)와 연통되는 제3 관로(230)가 형성된다.The piston 200 includes a first conduit 210 communicating with the front chamber 110 and a second conduit 220 communicating with the respective pockets 250. The second conduit 220 communicates with the rear chamber 120, A third channel 230 is formed.

이와 함께 상기 밸브(300)는 제1 관로(210)와 제2 관로(220)를 연결시키되, 상기 제2 관로(220)의 유압이 일정압력 이상으로 상승하게 되면 절환되어 상기 제1 관로(210)와 제2 관로(220)를 차단시켜 각각의 포켓(250)에 형성되는 정압베어링의 압력을 일정하게 유지시킬 수 있게 된다. 또한 상기 밸브(300)는 제1 관로(210)와 제2 관로(220)를 연결시키되, 각각의 포켓(250)의 유압이 일정압력 이상으로 상승하게 되면 절환되어 제1 관로(210)와 제3 관로(230)를 연결시켜 각각의 포켓(250)에 형성되는 정압베어링의 압력을 일정하게 유지시킬 수 있게 된다.The valve 300 is connected to the first conduit 210 and the second conduit 220. When the hydraulic pressure of the second conduit 220 rises above a predetermined pressure, And the second conduit 220 are shut off, the pressure of the static pressure bearing formed in each of the pockets 250 can be kept constant. The valve 300 is connected to the first conduit 210 and the second conduit 220. When the hydraulic pressure of each of the pockets 250 rises above a predetermined pressure, The pressure of the static pressure bearings formed in the respective pockets 250 can be maintained constant by connecting the three pipes 230.

자세하게 상기 밸브(300)에는 제1 관로(210)와 연결되는 제1 포트(310)와 상기 제2 관로(220)와 연결되는 제2 포트(320) 및 상기 제3 관로(230)와 연결되는 제3 포트(330)가 구성되어 상기 밸브(300)는 상기 제2 관로(220) 상의 압력이 일정압력 미만의 범위 즉 밸브의 설정압력 미만의 범위내에 해당되면 상기 제1 포트(310)와 제2 포트(320)를 연결시켜 각각의 포켓(250)으로 작동유를 공급하여 정압베어링의 형성을 가능케 하고, 상기 전진챔버(110)의 압력이 상승하여 제2 관로(220)로 유입되는 작동유의 압력이 커져 상기 제2 관로(220) 상의 압력이 밸브(300)의 설정 압력 이상으로 더 커지게 되면 상기 밸브(220)는 제1 포트(310)와 제2 포트(320)를 차단하여 제2 관로(220) 상의 압력이 밸브의 설정압력 미만의 범위에서 일정하게 유지되도록 한다.The valve 300 includes a first port 310 connected to the first conduit 210, a second port 320 connected to the second conduit 220, and a second port 320 connected to the third conduit 230. The third port 330 may be formed so that the valve 300 is closed when the pressure on the second conduit 220 falls within a range below a predetermined pressure, 2 ports 320 are connected to supply hydraulic oil to each of the pockets 250 to enable the formation of a hydrostatic bearing and the pressure of the hydraulic oil flowing into the second conduit 220 due to the rise of the pressure of the advance chamber 110 The valve 220 closes the first port 310 and the second port 320 and the second port 320 is closed by the second channel 320. When the pressure on the second channel 220 becomes greater than the set pressure of the valve 300, (220) to remain constant in a range below the set pressure of the valve.

또한 상기 밸브(300)는 각각의 포켓(250)의 압력이 밸브의 설정압력 미만의 범위내에 해당되면 상기 제1 포트(310)와 제2 포트(320)를 연결시켜 각각의 포켓(250)으로 작동유를 공급하여 정압베어링의 형성을 가능케 하고, 각각의 포켓(250)의 압력이 외력에 의해서 자칫 편심하중이 발생하게 되어 각각의 포켓(250)에 정압베어링의 압력이 불균형하거나 상승하게 되어 밸브의 설정압력 이상으로 더 커지게 되면 상기 밸브(220)는 제2 포트(320)를 제3 포트(330)와 연결시켜 각각의 포켓(250)의 작동유를 후측챔버로 배출시키게 된다.The valve 300 also connects the first port 310 and the second port 320 to each of the pockets 250 when the pressure of the respective pockets 250 falls within a range of less than a set pressure of the valve. The pressure of the static pressure bearings is unbalanced or raised in each of the pockets 250 by the external force so that the pressure of each of the pockets 250 is unbalanced or raised, The valve 220 connects the second port 320 to the third port 330 and discharges the operating fluid of each of the pockets 250 to the rear chamber.

이와 함께 각각의 포켓(250)의 입구에는 오리피스(oriffice)가 구비되어 각각의 포켓(250)에 구비되는 작동유의 유량 및 압력 조절을 용이하게 할 수도 있으며, 상기 각각의 포켓의 인근에는 오일 그루브(oil groove)와 복수의 틈으로 구성되는 래비린스씰부(labyrinth seal)가 형성되어 각각의 포켓(250)에서 누설되는 작동유를 회수하고 누설되는 유체를 이용하여 윤활작용을 높이게 된다.
In addition, an orifice is provided at the entrance of each of the pockets 250 to facilitate adjustment of the flow rate and pressure of the hydraulic fluid provided in each of the pockets 250, and oil grooves a labyrinth seal formed of a plurality of oil grooves and a plurality of gaps is formed to recover hydraulic fluid leaking from each of the pockets 250 and to enhance the lubricating action by using the fluid to be leaked.

이상과 같이 본 발명의 기본적인 기술적 사상은 단동식 유압실린더 내의 피스톤에 형성되는 정압베어링의 압력을 일정하게 유지시킬 수 있는 정압베어링의 압력제어가 가능한 단동식 유압실린더를 제공하는 것임을 알 수 있다.As described above, it is understood that the basic technical idea of the present invention is to provide a single-acting hydraulic cylinder capable of controlling the pressure of the hydrostatic bearing capable of constantly maintaining the pressure of the hydrostatic bearing formed in the piston in the single acting hydraulic cylinder.

이러한 본 발명의 기본적인 기술적 사상의 범주내에서 당업계의 통상적인 지식을 가진 자에 의해 다양한 변형이 가능함은 물론이다. 그러므로 본 발명의 범주는 다양한 변형 예들을 포함하도록 작성된 특허청구범위 내에서 해석되어야 할 것이다.It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the scope of the present invention should be construed within the scope of the appended claims to cover various modifications.

100: 유압실린더 110: 전진챔버
120: 후진챔버
200: 피스톤 210: 제1 관로
220: 제2 관로 230: 제3 관로
250: 포켓
300: 밸브 310: 제1 포트
320: 제2 포트 330: 제3 포트100: Hydraulic cylinder 110: Forward chamber
120: Reverse chamber
200: piston 210: first conduit
220: second conduit 230: third conduit
250: Pocket
300: valve 310: first port
320: second port 330: third port

Claims (4)

내부를 전진챔버(110)와 후진챔버(120)로 구획하며 외주면에 복수개의 포켓(250)이 형성되는 피스톤(200)을 포함하는 단동식 유압실린더에 있어서,
상기 피스톤(200)의 내부에 설치되어 각각의 포켓(250)들로 공급되는 작동유의 압력을 일정하게 유지시키는 밸브(300)를 포함하여 이루어지는 것을 특징으로 하는 정압베어링의 압력제어가 가능한 단동식 유압실린더.1. A single acting hydraulic cylinder comprising a piston (200) defining an inside of an advance chamber (110) and a back chamber (120) and having a plurality of pockets (250)
And a valve (300) installed inside the piston (200) to keep the pressure of the hydraulic fluid supplied to each of the pockets (250) constant. The single - acting hydraulic pressure cylinder. 제1항에 있어서,
상기 피스톤(200)의 내부에는,
상기 전측챔버(110)와 연통되는 제1 관로(210),
상기 각각의 포켓(250)과 연통되는 제2 관로(220) 및,
상기 후측챔버(120)를 연통되는 제3 관로(230)가 형성되는 것을 특징으로 하는 정압베어링의 압력제어가 가능한 단동식 유압실린더.The method according to claim 1,
Inside the piston 200,
A first conduit 210 communicating with the front chamber 110,
A second conduit 220 communicating with the respective pockets 250,
And a third conduit (230) communicating with the rear chamber (120) is formed in the rear chamber (120). 제2항에 있어서,
상기 밸브(300)는,
상기 제1 관로(210)와 제2 관로(220)를 연결시키되, 상기 제2 관로(220)의 유압이 일정압력 이상으로 상승하게 되면 절환되어 상기 제1 관로(210)와 제2 관로(220)를 차단시키는 것을 특징으로 하는 정압베어링의 압력제어가 가능한 단동식 유압실린더.3. The method of claim 2,
The valve (300)
When the hydraulic pressure of the second conduit 220 rises above a predetermined pressure, the first conduit 210 and the second conduit 220 are connected to each other, ) Of the hydrostatic bearing is cut off. 제2항 또는 제3항에 있어서,
상기 밸브(300)는,
상기 제1 관로(210)와 제2 관로(220)를 연결시키되, 각각의 포켓(250)의 유압이 일정압력 이상으로 상승하게 되면 절환되어 제1 관로(210)와 제3 관로(230)를 연결시키는 것을 특징으로 하는 정압베어링의 압력제어가 가능한 단동식 유압실린더.The method according to claim 2 or 3,
The valve (300)
When the hydraulic pressure of each of the pockets 250 rises above a predetermined pressure, the first and second pipes 210 and 230 are connected to each other so that the first pipe 210 and the second pipe 220 are connected to each other. Wherein the first and second hydraulic cylinders are connected to each other.
KR1020140165123A 2014-11-25 2014-11-25 Single acting hydraulic cylinder can control of the pressure of static pressure bearing Ceased KR20160062425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140165123A KR20160062425A (en) 2014-11-25 2014-11-25 Single acting hydraulic cylinder can control of the pressure of static pressure bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140165123A KR20160062425A (en) 2014-11-25 2014-11-25 Single acting hydraulic cylinder can control of the pressure of static pressure bearing

Publications (1)

Publication Number Publication Date
KR20160062425A true KR20160062425A (en) 2016-06-02

Family

ID=56135579

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140165123A Ceased KR20160062425A (en) 2014-11-25 2014-11-25 Single acting hydraulic cylinder can control of the pressure of static pressure bearing

Country Status (1)

Country Link
KR (1) KR20160062425A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101951153B1 (en) * 2018-08-13 2019-02-21 동의대학교 산학협력단 Vapor turbine governor
CN110307206A (en) * 2019-06-21 2019-10-08 同济大学 A Low Internal Leakage Anti-offset Load Hydraulic Cylinder System
EP3866550A1 (en) 2015-10-20 2021-08-18 Wilus Institute of Standards and Technology Inc. Wireless communication method and wireless communication terminal in high-density environment including overlapped basic service set
CN116972043A (en) * 2023-08-29 2023-10-31 哈尔滨工业大学 A frictionless balanced cylinder combined with surface throttling and slit throttling and its working method
KR20250176243A (en) 2024-06-12 2025-12-19 오명선 single acting hydraulic cylinder minimizing leakage from hydrostatic bearing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101176924B1 (en) 2012-04-18 2012-08-30 서호덕 Piston's hydrostatic bearing of single rod cylinder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101176924B1 (en) 2012-04-18 2012-08-30 서호덕 Piston's hydrostatic bearing of single rod cylinder

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3866550A1 (en) 2015-10-20 2021-08-18 Wilus Institute of Standards and Technology Inc. Wireless communication method and wireless communication terminal in high-density environment including overlapped basic service set
EP4576864A2 (en) 2015-10-20 2025-06-25 Wilus Institute of Standards and Technology Inc. Wireless communication method and wireless communication terminal in high-density environment including overlapped basic service set
KR101951153B1 (en) * 2018-08-13 2019-02-21 동의대학교 산학협력단 Vapor turbine governor
CN110307206A (en) * 2019-06-21 2019-10-08 同济大学 A Low Internal Leakage Anti-offset Load Hydraulic Cylinder System
CN116972043A (en) * 2023-08-29 2023-10-31 哈尔滨工业大学 A frictionless balanced cylinder combined with surface throttling and slit throttling and its working method
KR20250176243A (en) 2024-06-12 2025-12-19 오명선 single acting hydraulic cylinder minimizing leakage from hydrostatic bearing

Similar Documents

Publication Publication Date Title
KR20160062425A (en) Single acting hydraulic cylinder can control of the pressure of static pressure bearing
AU2014290908B2 (en) Shaft seal and a method of operating such a shaft seal
JP6553969B2 (en) Reciprocating compressor
US11719595B2 (en) Testing device and testing system for high-pressure and large-scale gap dynamic sealing performance
MX336049B (en) Cutter assembly for tunnel boring machine with pressure compensation.
MX2020014007A (en) Double seal lubricated packing gland and rotating sleeve.
BR112018005846A2 (en) hydraulic circuit for use in cvt vehicle
NO329730B1 (en) Piston Pump
MX380554B (en) FLUID PUMP FOR A LINEAR ACTUATOR.
KR101176924B1 (en) Piston's hydrostatic bearing of single rod cylinder
CN103511385B (en) High frequency loads servo vibration hydraulic cylinder
ES2178431T3 (en) SUPPLY OF REFRIGERANT FLUID TO HYDRAULICALLY OPERATED ROLLERS IN CONTINUOUSLY VARIABLE RELATIONSHIP TRANSMISSIONS.
RU2009121639A (en) PISTON CHANNEL DEFORMATION COMPENSATION IN WELL BUTT-OFF VALVES
GB1049074A (en) Piston seal in gas compressor
SE0400611D0 (en) Hydraulic pressure accumulator
BR112023014182A2 (en) HYDRAULIC PISTON CONFIGURATION INSENSITIVE TO WELLBORE PRESSURE
RU169276U1 (en) Sealing device for cylindrical pairs of hydropneumatic machines
CN201382042Y (en) Segmental-type piston double-action short-stroke hydraulic cylinder device
NO172510B (en) REVERSE CASE SEALING DEVICE FOR A SHIELD COMPRESSOR
FI130288B (en) Electro-hydraulic actuator
CN204025691U (en) Seal arrangement between the two articles that a kind of work does relatively reciprocating motion
JP5767990B2 (en) Fluid pressure cylinder
GB2505704A (en) Passive lubricant pressure control for cylinder seal
CN204253953U (en) Safety check
WO2017178249A3 (en) Hydraulic cylinder

Legal Events

Date Code Title Description
A201 Request for examination
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 20141125

PA0201 Request for examination
E902 Notification of reason for refusal
PE0902 Notice of grounds for rejection

Comment text: Notification of reason for refusal

Patent event date: 20160419

Patent event code: PE09021S01D

PG1501 Laying open of application
E601 Decision to refuse application
PE0601 Decision on rejection of patent

Patent event date: 20160927

Comment text: Decision to Refuse Application

Patent event code: PE06012S01D

Patent event date: 20160419

Comment text: Notification of reason for refusal

Patent event code: PE06011S01I