KR20010000690A - Hydrostatic bearing of piston - Google Patents
Hydrostatic bearing of piston Download PDFInfo
- Publication number
- KR20010000690A KR20010000690A KR1020000060240A KR20000060240A KR20010000690A KR 20010000690 A KR20010000690 A KR 20010000690A KR 1020000060240 A KR1020000060240 A KR 1020000060240A KR 20000060240 A KR20000060240 A KR 20000060240A KR 20010000690 A KR20010000690 A KR 20010000690A
- Authority
- KR
- South Korea
- Prior art keywords
- piston
- hydraulic
- distribution chamber
- supplied
- balance
- Prior art date
Links
Classifications
-
- 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
- F16C32/0629—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 supported by a liquid cushion, e.g. oil cushion
- F16C32/064—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 supported by a liquid cushion, e.g. oil cushion the liquid being supplied under pressure
- F16C32/0644—Details of devices to control the supply of liquids to the bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
-
- 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
- F16C32/0629—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 supported by a liquid cushion, e.g. oil cushion
- F16C32/064—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 supported by a liquid cushion, e.g. oil cushion the liquid being supplied under pressure
- F16C32/0651—Details of the bearing area per se
- F16C32/0659—Details of the bearing area per se of pockets or grooves
Abstract
Description
본 발명은 피스톤의 정압베어링에 관한 것으로, 특히 피스톤의 외주면을 따라 원주방향으로 형성된 다수의 포켓에 가압유체를 공급하여 직선왕복운동을 하는 피스톤을 균형있게 지지케하는 피스톤의 정압베어링에 관한 것이다.The present invention relates to a hydrostatic bearing of a piston, and more particularly, to a hydrostatic bearing of a piston for supplying pressurized fluid to a plurality of pockets formed in the circumferential direction along the outer circumferential surface of the piston to balance the piston in a linear reciprocating motion.
일반적으로, 실린더에는 도1에 도시한 바와 같이 피스톤로드(3)의 작동에 따라 피스톤(2)이 실린더튜브(1)의 내벽을 따라 직선 왕복운동을 하게 된다.In general, as shown in FIG. 1, the cylinder 2 linearly reciprocates along the inner wall of the cylinder tube 1 in accordance with the operation of the piston rod 3.
이때, 실린더튜브(1)내에 공급되는 윤활유는 피스톤(2)의 왕복에 따라 실린더튜브(1)의 내벽과 피스톤(2)의 메탈실(Metal Seal) 사이에 유막을 형성하게 되고, 이 유막은 실린더튜브(1)의 내벽과 피스톤(2)의 메탈실(Metal Seal) 사이에발생되는 접촉에 의한 마찰을 방지하게 된다.At this time, the lubricating oil supplied in the cylinder tube 1 forms an oil film between the inner wall of the cylinder tube 1 and the metal seal of the piston 2 as the piston reciprocates. The friction caused by the contact generated between the inner wall of the cylinder tube 1 and the metal seal of the piston 2 is prevented.
여기서, 피스톤(2)의 왕복에 따라 실린더튜브(1)의 내벽과 피스톤(2)의 메탈실(Metal Seal) 사이에 형성되는 유막은 클리어런스(Clealance)가 가장 좁아지는 곳에 윤활유의 유압이 발생되고, 이 유압에 의해서 피스톤을 지지하게 되는 일종의 동압베어링이다.Here, the oil film formed between the inner wall of the cylinder tube (1) and the metal seal of the piston (2) in accordance with the reciprocation of the piston (2), the hydraulic pressure of the lubricating oil is generated where the clearance (Clealance) is the narrowest This is a kind of dynamic pressure bearing which supports the piston by this hydraulic pressure.
그러나, 종래의 실린더에 있어서 실린더튜브(1)의 내벽과 피스톤(2)의 메탈실(Metal Seal) 사이에 형성되는 유막은 그 유압의 차이에 따라 피스톤의 편심을 유발시키게 되고, 이로 인해 피스톤의 정속주행을 방해하게 된다.However, in the conventional cylinder, an oil film formed between the inner wall of the cylinder tube 1 and the metal seal of the piston 2 causes an eccentricity of the piston according to the hydraulic pressure difference, which causes the piston to Interfere with cruise.
본 발명은 피스톤의 외주면을 따라 원주방향으로 형성된 다수의 포켓에 가압유체를 공급하여 직선왕복운동을 하는 피스톤을 균형있게 지지케함으로써 피스톤의 편심주행을 방지할 수 있는 피스톤의 정압베어링을 제공함에 그 목적이 있다.The present invention provides a positive pressure bearing of the piston that can prevent the eccentric driving of the piston by supplying a pressurized fluid to a plurality of pockets formed in the circumferential direction along the outer circumferential surface of the piston to balance the piston reciprocating linearly. There is a purpose.
도1은 종래 실린더의 구조를 나타내는 단면도,1 is a cross-sectional view showing the structure of a conventional cylinder;
도2는 본 발명에 따른 정압베어링이 형성되는 실린더의 구조를 나타내는 단면도,2 is a cross-sectional view showing a structure of a cylinder in which a static pressure bearing according to the present invention is formed;
도3은 본 발명에 따른 피스톤의 정압베어링의 작용상태를 나타내는 모식도이다.Figure 3 is a schematic diagram showing the operating state of the hydrostatic bearing of the piston according to the present invention.
〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>
1: 실린더튜브 2: 피스톤 3: 피스톤로드 4: 메탈실 7: 유압포켓 8: 유압공급관 9: 유압분배쳄버 10: 유압통로 12: 피스톤 13: 피스톤로드DESCRIPTION OF SYMBOLS 1: Cylinder tube 2: Piston 3: Piston rod 4: Metal seal 7: Hydraulic pocket 8: Hydraulic supply line 9: Hydraulic distribution chamber 10: Hydraulic passage 12: Piston 13: Piston rod
상기한 목적을 달성하기 위하여 본 발명은 피스톤의 중심부에 형성되어 유압이 충전되는 유압분배쳄버와; 피스톤로드의 중심축을 따라 형성되면서 외부로부터 공급되는 유압을 상기 유압분배쳄버에 공급하도록 설치되는 유압통로와; 상기 피스톤의 외주면을 따라 서로 일정각도를 이루도록 형성되면서 각 유압공급관을 통해 공급되는 상기 유압분배쳄버의 유압을 이용하여 상기 피스톤을 균형적으로 지지하게 되는 유압포켓으로 구성되는 것을 특징으로 하는 피스톤의 정압베어링을 제공한다.The present invention is formed in the center of the piston to achieve the above object and the hydraulic distribution chamber is filled with hydraulic pressure; A hydraulic passage formed along a central axis of the piston rod and installed to supply the hydraulic pressure supplied from the outside to the hydraulic distribution chamber; The positive pressure of the piston, characterized in that it is formed to form a predetermined angle with each other along the outer circumferential surface of the piston is configured by a hydraulic pocket to support the piston in a balanced manner by using the hydraulic pressure of the hydraulic distribution chamber supplied through each hydraulic supply pipe Provide bearings.
도면을 참조하여 본 발명을 설명한다.The present invention will be described with reference to the drawings.
도2는 본 발명에 따른 정압베어링이 형성되는 실린더의 구조를 나타내는 단면도이고, 도3은 본 발명에 따른 피스톤의 정압베어링의 작용상태를 나타내는 모식도이다.2 is a cross-sectional view showing the structure of a cylinder in which a hydrostatic bearing is formed according to the present invention, and FIG.
본 발명에서는 피스톤로드(13)의 중심축을 따라 유압통로(10)가 형성되어 있고, 이 유압통로를 통해 실린더튜브(1)의 외부에서 정압의 유체를 공급하도록 설계되어 있다.In the present invention, the hydraulic passage 10 is formed along the central axis of the piston rod 13, it is designed to supply a constant pressure fluid from the outside of the cylinder tube (1) through the hydraulic passage.
그리고, 본 발명에 따른 피스톤(12)에는 그 중심부에 유압분배쳄버(9)가 형성되어 있고, 이 유압분배쳄버(9)는 피스톤까지 연장 형성되는 유체통로(10)로부터 유압이 공급되도록 설치되어 있다.In the piston 12 according to the present invention, a hydraulic distribution chamber 9 is formed at a central portion thereof, and the hydraulic distribution chamber 9 is installed to supply hydraulic pressure from the fluid passage 10 extending to the piston. have.
또한, 본 발명의 피스톤(12)에는 그 외주면을 따라 다수의 유압포켓(7)이 원주방향으로 이격되도록 형성되어 있고, 이 유압포켓(7)은 유압공급관(8)에 의해 유압분배쳄버(9)와 연결되어 있다.In addition, a plurality of hydraulic pockets 7 are formed in the piston 12 of the present invention so as to be spaced apart in the circumferential direction along the outer circumferential surface, and the hydraulic pockets 7 are hydraulic distribution chambers 9 by a hydraulic supply pipe 8. )
특히, 유압포켓(7)은 3개가 설치될 경우 서로 120°각을 이루며, 4개가 설치될 경우 90°각을 이루고, 5개가 설치될 경우 72°각을 이루도록 설계되어 피스톤(12)의 밸런스를 유지시키게 된다.In particular, the hydraulic pockets 7 are designed to form a 120 ° angle to each other when three are installed, to form a 90 ° angle when four are installed, and to form a 72 ° angle when five are installed to balance the piston 12. Will be maintained.
이때, 유압분배쳄버(9)의 유압은 유압공급관(8)을 통해 유압포켓(7)에 동시에 일정압으로 공급되도록 설계되어 있다.At this time, the hydraulic pressure of the hydraulic distribution chamber 9 is designed to be supplied at a constant pressure to the hydraulic pocket 7 at the same time through the hydraulic supply pipe (8).
한편, 외부에서 유압통로(10)를 통해 일정압으로 공급되는 유압은 일단 유압분배쳄버(9)에 충전된 후, 다시 각 유압공급관(8)을 통해 유압포켓(7)에 공급된다.On the other hand, the hydraulic pressure supplied at a constant pressure from the outside through the hydraulic passage (10) is once filled in the hydraulic distribution chamber (9), and then again supplied to the hydraulic pocket (7) through each hydraulic supply pipe (8).
여기서, 유압포켓(7)의 유압은 실린더튜브(1)의 내벽을 따라 직진 왕복운동을 하는 피스톤(12)을 일정압으로 지지하는 정압베어링을 형성하게 된다.Here, the hydraulic pressure of the hydraulic pocket (7) forms a positive pressure bearing for supporting the piston 12 in a constant pressure in a straight reciprocating motion along the inner wall of the cylinder tube (1).
따라서, 일정압력을 유지하는 유압포켓(7)의 유압은 피스톤(12)을 등각분할된 다수의 방향에서 균형있게 지지함으로써 편심운동을 방지하게 된다.Therefore, the hydraulic pressure of the hydraulic pocket 7 which maintains a constant pressure prevents the eccentric motion by supporting the piston 12 in a balanced manner in a plurality of equally divided directions.
본 발명은 피스톤의 외주면을 따라 원주방향으로 형성된 다수의 포켓에 가압유체를 공급하여 직진운동을 하는 피스톤을 균형적으로 지지함으로써 피스톤의 편심주행을 방지할 수 있는 효과를 제공하게 된다.The present invention provides an effect that can prevent the eccentric driving of the piston by supplying a pressurized fluid to a plurality of pockets formed in the circumferential direction along the outer circumferential surface of the piston in a balanced manner.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020000060240A KR20010000690A (en) | 2000-10-13 | 2000-10-13 | Hydrostatic bearing of piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020000060240A KR20010000690A (en) | 2000-10-13 | 2000-10-13 | Hydrostatic bearing of piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20010000690A true KR20010000690A (en) | 2001-01-05 |
Family
ID=19693300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020000060240A KR20010000690A (en) | 2000-10-13 | 2000-10-13 | Hydrostatic bearing of piston |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20010000690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777496A (en) * | 2012-08-09 | 2012-11-14 | 华锐风电科技(集团)股份有限公司 | Thickness automatically-compensating device for multi-oil-chamber static pressure oil film, and system thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143902U (en) * | 1984-03-06 | 1985-09-24 | 太陽鉄工株式会社 | Low friction type fluid pressure cylinder |
| JPS63255589A (en) * | 1987-04-10 | 1988-10-21 | Matsushita Electric Ind Co Ltd | Rolling piston type compressor |
| JPH07224807A (en) * | 1994-02-10 | 1995-08-22 | Nippondenso Co Ltd | Cylinder device |
| JPH11125252A (en) * | 1997-10-23 | 1999-05-11 | Koyo Seiko Co Ltd | Static pressure bearing |
-
2000
- 2000-10-13 KR KR1020000060240A patent/KR20010000690A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143902U (en) * | 1984-03-06 | 1985-09-24 | 太陽鉄工株式会社 | Low friction type fluid pressure cylinder |
| JPS63255589A (en) * | 1987-04-10 | 1988-10-21 | Matsushita Electric Ind Co Ltd | Rolling piston type compressor |
| JPH07224807A (en) * | 1994-02-10 | 1995-08-22 | Nippondenso Co Ltd | Cylinder device |
| JPH11125252A (en) * | 1997-10-23 | 1999-05-11 | Koyo Seiko Co Ltd | Static pressure bearing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777496A (en) * | 2012-08-09 | 2012-11-14 | 华锐风电科技(集团)股份有限公司 | Thickness automatically-compensating device for multi-oil-chamber static pressure oil film, and system thereof |
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