KR100297251B1 - A cushion plunger of hydraulic cyli-nder - Google Patents
A cushion plunger of hydraulic cyli-nder Download PDFInfo
- Publication number
- KR100297251B1 KR100297251B1 KR1019990015724A KR19990015724A KR100297251B1 KR 100297251 B1 KR100297251 B1 KR 100297251B1 KR 1019990015724 A KR1019990015724 A KR 1019990015724A KR 19990015724 A KR19990015724 A KR 19990015724A KR 100297251 B1 KR100297251 B1 KR 100297251B1
- Authority
- KR
- South Korea
- Prior art keywords
- cushion plunger
- hydraulic cylinder
- cushion
- plunger
- pressure
- 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.)
- Expired - Fee Related
Links
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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
-
- 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
- F15B15/1423—Component parts; Constructional details
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/755—Control of acceleration or deceleration of the output member
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
본 발명은 유압실린더의 쿠션플런저(Cushion Plunger)에 관한 것으로, 특히유압실린더의 쿠션플런저에 있어서, 그 외주면이 15。∼2。의 경사각을 가지면서 후방측으로 갈수록 경사각이 감소되는 다단계의 경사면으로 형성되는 것을 특징으로 하는 유압실린더의 쿠션플런저에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion plunger of a hydraulic cylinder. In particular, in a cushion plunger of a hydraulic cylinder, the outer circumferential surface is formed as a multi-step inclined surface having an inclination angle of 15. It relates to a cushion plunger of the hydraulic cylinder, characterized in that.
Description
본 발명은 유압실린더의 쿠션플런저(Cushion Plunger)에 관한 것으로, 특히 유압실린더의 피스톤 후진시 발생되는 초과압력(Pick Pressure)을 설정압력내에서 제어할 수 있도록 그 외주면이 5단계 각도의 원추형상으로 형성되는 유압실린더의 쿠션플런저(Cushion Plunger)에 관한 것이다.The present invention relates to a cushion plunger (Cushion Plunger) of the hydraulic cylinder, in particular, the outer circumferential surface in the conical shape of the five-step angle to control the excess pressure (Pick Pressure) generated during the piston retraction of the hydraulic cylinder within the set pressure It relates to a cushion plunger (Cushion Plunger) of the hydraulic cylinder to be formed.
일반적으로, 도1에 도시한 바와같이 종래의 쿠션플런저(Cushion Plunger)(1)는 원통형이거나 일정한 각도의 원추형 스풀타입(Spool Type)으로 형성되어 피스톤(2)의 후진시 유로(9)의 내주면을 따라 후진하게 된다.In general, as shown in FIG. 1, the conventional cushion plunger 1 is formed in a cylindrical or conical spool type at a predetermined angle so that the inner peripheral surface of the flow path 9 when the piston 2 is reversed. Will follow along.
그리고, 쿠션공간(4)내의 유압은 후진되는 피스톤(2)에 의해 유로(9)와 쿠션플런저(1) 사이틈을 통해 헤드포트(8)측으로 배출된다.And the hydraulic pressure in the cushion space 4 is discharged to the head port 8 side through the clearance between the flow path 9 and the cushion plunger 1 by the piston 2 which retracts.
이때, 유로(9)와 쿠션플런저(1) 사이틈으로 배출되는 쿠션공간(4)의 유압에는 초과압력(Pick Pressure)이 발생되고, 특히 유압의 초과압력은 쿠션플런저의 외주면 형상에 의해 도2에 도시한 바와같이 순간적으로 유압설정값(Ps) 이상으로 증가되어 유압실린더에 진동을 발생시키게 된다.At this time, pick-up pressure is generated in the hydraulic pressure of the cushion space 4 discharged between the flow path 9 and the cushion plunger 1, and in particular, the excess pressure of the hydraulic pressure is determined by the shape of the outer circumferential surface of the cushion plunger. As shown in FIG. 2, the oil pressure is momentarily increased above the hydraulic pressure setting value P s to generate vibration in the hydraulic cylinder.
본 발명은 유압실린더의 피스톤 후진시 발생되는 유압의 초과압력(Pick Pressure)을 설정압력내에서 제어할 수 있도록 그 외주면이 5단계의 경사각도를 갖는 원추형상으로 형성되는 유압실린더의 쿠션플런저(Cushion Plunger)를 제공함에 그 목적을 있다.The present invention provides a cushion plunger (Cushion) of a hydraulic cylinder in which the outer circumferential surface is formed in a conical shape having an inclination angle of five stages so that the hydraulic pressure generated during the piston retraction of the hydraulic cylinder can be controlled within a set pressure. Plunger) is to provide that purpose.
도1은 종래의 쿠션플런저가 부착된 유압실린더를 나타내는 단면도,1 is a cross-sectional view showing a conventional hydraulic cylinder with a cushion plunger;
도2는 종래의 유압실린더내에서 발생되는 시간에 따른 유압의 파형을 나타내는 그래프,2 is a graph showing a waveform of hydraulic pressure according to time generated in a conventional hydraulic cylinder;
도3은 본 발명에 따른 쿠션플런저가 부착된 유압실린더를 나타내는 단면도,3 is a cross-sectional view showing a hydraulic cylinder with a cushion plunger according to the present invention;
도4는 본 발명에 따른 쿠션플런저가 부착된 유압실린더내에서 발생되는 시간에 따른 유압의 파형을 나타내는 그래프이다.Figure 4 is a graph showing the waveform of the hydraulic pressure with time generated in the hydraulic cylinder with a cushion plunger according to the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
1: 쿠션플런저 2: 피스톤 3: 튜브 4: 쿠션영역 5: 체크밸브 8: 공급포트 9: 유로 10: 쿠션플런저 Ps: 설정압력1: cushion plunger 2: piston 3: tube 4: cushion area 5: check valve 8: supply port 9: flow path 10: cushion plunger Ps: set pressure
상기한 목적을 달성하기 위하여 본 발명은 유압실린더의 쿠션플런저에 있어서, 그 외주면이 전방측에서 후방측으로 갈수록 경사각도가 감소되는 다단계의 경사면으로 형성되는 것을 특징으로 하는 유압실린더의 쿠션플런저를 제공한다.In order to achieve the above object, the present invention provides a cushion plunger of a hydraulic cylinder, characterized in that the outer circumferential surface is formed of a multi-step inclined surface in which the inclination angle is reduced from the front side to the rear side. .
도면을 참조하여 본 발명을 설명한다.The present invention will be described with reference to the drawings.
도3은 본 발명에 따른 쿠션플런저가 부착된 유압실린더를 나타내는 단면도이고, 도4는 본 발명에 따른 쿠션플런저가 부착된 유압실린더내에서 발생되는 시간에 따른 유압의 파형을 나타내는 그래프이다.Figure 3 is a cross-sectional view showing a hydraulic cylinder with a cushion plunger according to the present invention, Figure 4 is a graph showing the waveform of the hydraulic pressure over time generated in the hydraulic cylinder with a cushion plunger according to the present invention.
본 발명에 따른 유압실린더의 쿠션플런저(Cushion Plunger)(10)는 유로(9)내에 삽입되는 그 외주면이 5단계의 각도로 형성되어 있다.In the cushion plunger 10 of the hydraulic cylinder according to the present invention, the outer circumferential surface to be inserted into the flow path 9 is formed at an angle of five steps.
즉, 쿠션플런저(10)의 외주면은 최전방측의 경사각이 15。이고, 점차 그 후방측으로 갈수록 그 경사각도가 작아지면서 최후방측의 경사각이 2。를 이루도록 제작되어 있다.That is, the outer circumferential surface of the cushion plunger 10 is manufactured so that the inclination angle of the foremost side is 15 DEG, and the inclination angle of the rearmost side is 2 DEG gradually as the rear side gradually decreases.
따라서, 본 발명에 따른 유압실린더의 쿠션플런저(Cushion Plunger)(10)는 후진되면서 유로(9)의 내주면 선단측과의 간격을 점차적으로 줄임으로써 쿠션공간(4)으로부터 유로(9)로 배출되는 유압의 충격을 서서히 제거할 수 있게 된다.Therefore, the cushion plunger 10 of the hydraulic cylinder according to the present invention is discharged from the cushion space 4 to the flow path 9 by gradually reducing the distance from the front end side of the inner circumferential surface of the flow path 9 while being reversed. The hydraulic shock can be gradually eliminated.
다시말하면, 유로(9)와 쿠션플런저(10) 사이틈으로 배출되는 쿠션공간(4)의 초기순간유압은 도4에 도시한 바와같이 쿠션플런저의 15。 경사면과 유로의 선단 사이에 형성되는 충분한 공간을 통해 배출됨으로써 초과압력(Pick Pressure)이 설정압력의 이하로 제어된다.In other words, the initial instantaneous hydraulic pressure of the cushion space 4 discharged into the gap between the flow path 9 and the cushion plunger 10 is sufficient to be formed between the 15 ° slope of the cushion plunger and the tip of the flow path as shown in FIG. By discharging through the space, the Pick Pressure is controlled below the set pressure.
그리고, 피스톤(2)의 후진이 진행되면서 쿠션플런저(10)와 유로(9)의 선단 사이에 형성되는 틈이 점차 줄어들지만 쿠션영역(4)에서 유로로 빠져나가는 유량 또한 감소되면서 그 유압도 설정압력내에서 관리가 가능하게 된다.In addition, as the piston 2 moves backward, a gap formed between the tip of the cushion plunger 10 and the flow path 9 gradually decreases, but the flow rate exiting the flow path from the cushion area 4 also decreases, thereby setting the hydraulic pressure. Management in pressure is possible.
따라서, 유로(9)와 쿠션플런저(10) 사이틈으로 배출되는 쿠션공간(4)의 유압은 이상적인 범위내에서 압력파형을 그리면서 감쇄되고, 이로써 유압실린더내의 진동이 현저히 감소하게 된다.Accordingly, the hydraulic pressure of the cushion space 4 discharged into the gap between the flow path 9 and the cushion plunger 10 is attenuated by drawing a pressure waveform within an ideal range, thereby significantly reducing the vibration in the hydraulic cylinder.
본 발명은 유압실린더의 피스톤 후진시 발생되는 유압의 초과압력(Pick Pressure)을 이상적인 범위내에서 제어할 수 있어 유압실린더내의 진동을 방지할 수 있는 효과를 제공하게 된다.The present invention can control the hydraulic pressure (Pick Pressure) generated during the piston back of the hydraulic cylinder within an ideal range to provide an effect that can prevent the vibration in the hydraulic cylinder.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990015724A KR100297251B1 (en) | 1999-04-30 | 1999-04-30 | A cushion plunger of hydraulic cyli-nder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990015724A KR100297251B1 (en) | 1999-04-30 | 1999-04-30 | A cushion plunger of hydraulic cyli-nder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000067711A KR20000067711A (en) | 2000-11-25 |
| KR100297251B1 true KR100297251B1 (en) | 2001-09-13 |
Family
ID=19583328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990015724A Expired - Fee Related KR100297251B1 (en) | 1999-04-30 | 1999-04-30 | A cushion plunger of hydraulic cyli-nder |
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| Country | Link |
|---|---|
| KR (1) | KR100297251B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6403073B2 (en) * | 2015-06-11 | 2018-10-10 | Smc株式会社 | Fluid pressure cylinder |
| CN216642638U (en) * | 2021-12-20 | 2022-05-31 | 娄底市中兴液压件有限公司 | Hydraulic cylinder, hydraulic system and working machine |
-
1999
- 1999-04-30 KR KR1019990015724A patent/KR100297251B1/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| KR20000067711A (en) | 2000-11-25 |
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