WO2001025639A1 - Pompe jumelle - Google Patents

Pompe jumelle Download PDF

Info

Publication number
WO2001025639A1
WO2001025639A1 PCT/KR2000/001075 KR0001075W WO0125639A1 WO 2001025639 A1 WO2001025639 A1 WO 2001025639A1 KR 0001075 W KR0001075 W KR 0001075W WO 0125639 A1 WO0125639 A1 WO 0125639A1
Authority
WO
WIPO (PCT)
Prior art keywords
pair
piston
cylinders
head sections
sections
Prior art date
Application number
PCT/KR2000/001075
Other languages
English (en)
Inventor
Phil-Chan Rha
Nam-Sik Joo
Original Assignee
Rha Phil Chan
Joo Nam Sik
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 Rha Phil Chan, Joo Nam Sik filed Critical Rha Phil Chan
Priority to AU76887/00A priority Critical patent/AU7688700A/en
Publication of WO2001025639A1 publication Critical patent/WO2001025639A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/02—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C2/06—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents of other than internal-axis type
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle

Definitions

  • the present invention relates to a twin pump wherein a piston having a pair of head sections is operatively disposed in a casing, and more particularly, the present invention relates to a twin pump which always reliably isolates an intaking part and a discharging part from each other while a piston disposed in a cylinder is operated, thereby preventing backflow of pressure medium.
  • twin pump had been developed in such a way as to perform a function of a rotary pump for force-feeding fluid such as liquid having a high viscosity, or the like, and at the same time of a vacuum pump for force-feeding air, gas or the like.
  • a twin pump disclosed in Korean Patent Publication No. 97-9955 which was filed in the name of the present applicant, will be described as a typical example of twin pumps.
  • FIG. 1 is a cross-sectional view illustrating a construction of a conventional twin pump including a pair of cylinders and a piston.
  • the conventional twin pump includes a casing 100.
  • the casing 100 has an inlet port 101 and an outlet port 102 which are defined on lower and upper surfaces, respectively, of the casing 100.
  • a pair of circular cylinders 103 are defined in the casing 100 in a manner such that they are communicated with each other.
  • a piston 200 In the pair of circular cylinders 103, there is disposed a piston 200.
  • the piston 200 is formed, at both ends thereof, with a pair of head sections 201 which are connected with each other by a linear plate section 202 and are respectively located in the pair of circular cylinders 103.
  • the head sections 201 which are formed at both ends of the piston 200, are mounted, at center portions thereof, to eccentric cams 301, respectively, which are rotated in opposite directions from each other via camshafts 300 by driving means.
  • the eccentric cams 301 which are mounted to the center portions of the pair of head sections 201 constituting the piston 200, are also rotated in the opposite directions from each other.
  • the head sections 201 are symmetrically moved in the circular cylinders 103 along opposite loci from each other, respectively, in a manner such that circumferential outer surfaces of the head sections 201 are brought into close contact with circumferential inner surfaces of the circular cylinders, respectively.
  • the twin pump allows fluid or gas to be repeatedly intaken through the inlet port 101 into the casing 100 and then to be force-fed toward the outlet port 102 of the casing 100.
  • the conventional twin pump constructed as mentioned above suffers from defects in that, as shown in FIG. 1, immediately before one head section 201 which is formed at one end of the piston 200, is brought into close contact with the circumferential inner surface of one cylinder 103, that is, immediately before one eccentric cam 301 which is mounted at the center portion of the one head section 201, reaches a top dead center, due to a momentary closing phenomenon for fluid or gas, fluid or gas which is present in the other cylinder 103, is excessively pressed.
  • an object of the present invention is to provide a twin pump which always reliably isolates an intaking part and a discharging part from each other while a piston disposed in a cylinder is operated, thereby preventing backflow of pressure medium.
  • Another object of the present invention is to provide a twin pump wherein a pair of head sections which are respectively formed at both ends of a piston, are connected with each other by virtue of an intermediate connecting section which is defined at upper and lower surfaces thereof with a pair of recessed portions, respectively, whereby it is possible to enhance pump capacity without increasing a volume of the pump .
  • a twin pump comprising: a casing having an inlet port and an outlet port which are defined at center portions of lower and upper surfaces thereof, the casing further having a pair of cylinders which are defined in a manner such that they are communicated with each other; a piston disposed in the pair of cylinders and formed, at both ends thereof, with a pair of head sections which are symmetrized with each other, each head section being formed, at an inner end and at each of upper and lower regions, with a close-contact section having a rounded convex portion and a rounded concave portion which are consecutively connected with each other, a circumferential inner surface of each of the pair of cylinders being formed in a manner such that a circumferential outer surface of each of the pair of head sections can be brought into close contact therewith while being moved thereon, the casing being formed, between the pair of cylinders and the inlet port and the outlet port, with semi-cir
  • the circumferential inner surfaces of the pair of cylinders are formed to each have a U-shaped contour so that the circumferential inner surfaces are symmetrized with each other; and the circumferential outer surfaces of the pair of head sections which are formed at both ends of the piston, are formed to each have a U-shaped contour so that the circumferential outer surfaces are symmetrized with each other.
  • the head sections which are formed at both ends of the piston and the close-contact sections are brought into close contact with the circumferential inner surfaces of the cylinders and inner surfaces of the semi-circular seating parts, simultaneously at two or more places.
  • the pair of head sections which are formed at both ends of the piston are connected with each other by virtue of an intermediate connecting section, the intermediate connecting section being formed, at upper and lower surfaces thereof, with a pair of circularly recessed portions which are recessed inward in a manner such that an intaking volume and a discharging volume can be increased.
  • FIG. 1 is a cross-sectional view illustrating a construction of a conventional twin pump including a pair of cylinders and a piston;
  • FIG. 2 is a cross-sectional view illustrating a construction of another conventional twin pump including a pair of cylinders and a piston;
  • FIG. 3 is a cross-sectional view illustrating a construction of a twin pump including a pair of cylinders and a piston, in accordance with an embodiment of the present invention
  • FIGs. 4a through 4d are cross-sectional views illustrating operations of the twin pump according to the present invention, wherein FIG. 4a shows an initial operating status, FIGs. 4b and 4d show intermediate operating statuses and FIG. 4c shows a final operating status .
  • FIG. 3 is a cross-sectional view illustrating a construction of a twin pump including a pair of cylinders and a piston, in accordance with an embodiment of the present invention.
  • the twin pump according to the present invention includes a casing 1.
  • the casing 1 has an inlet port 11 and an outlet port 12 which are defined at center portions of lower and upper surfaces of the casing 1.
  • the casing 1 further has a pair of cylinders 13 which are defined in a manner such that they are communicated with each other.
  • a piston 2 is disposed in the pair of cylinders 13.
  • the piston 2 is formed, at both ends thereof, with a pair of head sections 21 which are symmetrized with each other.
  • Each head section 21 is formed, at an inner end and at each of upper and lower regions thereof, with a close-contact section 23.
  • Each close contact section 23 has a rounded convex portion 231 and a rounded concave portion 232 which are continuously connected with each other.
  • a circumferential inner surface of each of the pair of cylinders 13 is formed in a manner such that a circumferential outer surface of each of the pair of head sections 21 can be brought into close contact therewith while being moved thereon.
  • the casing 1 is formed, between the pair of cylinders 13 and the inlet port 11 and the outlet port 12, with semi-circular seating parts 132 so that close-contact sections 23 of the piston 2 can be brought into close contact with the semi-circular seating parts 132.
  • a pair of eccentric cams 31 are fitted through center portions of the pair of head sections 21 and rotated in directions opposite to each other via camshafts 3 by means of driving means. At this time, a distance LI between centers a of the camshafts 3 equals to a distance L2 between centers b of the eccentric cams 31 which are fitted through the head sections 21 of the piston 2.
  • the eccentric cams 31 are rotated in the directions opposite to each other by means of the driving means (not shown) , due to the fact that the distance LI between the centers a of the camshafts 3 equals to the distance L2 between the centers b of the eccentric cams 31, the pair of head section 21 which are formed at both ends of the piston 2, can be symmetrically moved along predetermined loci, respectively.
  • the circumferential inner surfaces of the pair of cylinders 13 are formed to each have a U-shaped contour so that the circumferential inner surfaces are symmetrized with each other.
  • the circumferential outer surfaces of the pair of head sections 21 which are formed at both ends of the piston 2 are formed to each have a U-shaped contour so that the circumferential outer surfaces are symmetrized with each other.
  • a distance dl between a middle of the circumferential inner surface of one cylinder 13 and the semi-circular seating parts 132 formed in inner upper and lower portions of the other cylinder 13, is formed in such a way as to be relatively longer than a distance d2 between a middle of the circumferential outer surface of one head section 21 which is formed at one end of the piston 2 and a free end of the close-contact section 23 which is formed at the inner end of the other head section 21.
  • the pair of head sections 21 which are formed at both ends of the piston 2, are connected with each other by virtue of an intermediate connecting section 22.
  • the intermediate connecting section 22 is formed, at upper and lower surfaces thereof, with a pair of circularly recessed portions 221 which are recessed inward in a manner such that an intaking volume and a discharging volume can be increased. By this, without increasing a volume of the twin pump, pump capacity can be enhanced.
  • twin pump According to the present invention, advantages are provided in that, since an intaking part and a discharging part are always isolated from each other in a reliable manner while a piston disposed in a cylinder is operated, backflow of pressure medium is prevented, whereby the twin pump can serve as a high output (high pressure) pump.
  • pump capacity can be enhanced without increasing a volume of the pump, it is possible to obtain an efficiency of a high capacity pump with a reduced volume.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

La pompe jumelle de l'invention comprend un carter pourvu d'un orifice d'entrée et d'un orifice définis dans les zones centrales de ses faces supérieures et inférieures. Elle comprend également une paire de cylindre définis de façon à communiquer entre eux. Un piston disposé dans la paire de cylindres comporte en ses deux extrémités une paire de têtes. Chacune de ces têtes définit une zone à contact étroit partiellement sphériquement convexes et partiellement sphériquement concaves. Chaque cylindre présente une face intérieure cylindrique faite de telle façon que les faces cylindriques extérieures de chaque tête sont mises éventuellement en contact avec elle tout en venant s'y appliquer. Le carter est fait, entre la paire de cylindre et l'orifice d'entrée et l'orifice de sortie, de façon à présenter des sièges semi-circulaires de façon que les parties en contact étroit peuvent être amenées en contact étroit avec les sièges semi-circulaires. Enfin, la pompe comporte deux cames excentriques montées en travers des parties centrales des deux têtes et tournant en sens opposés via des arbres à cames animés par un dispositif d'entraînement. L'écart entre les deux arbres à cames est sensiblement égal à la distance entre les centres des cames excentriques pouvant se monter sur les têtes du piston.
PCT/KR2000/001075 1999-10-07 2000-09-27 Pompe jumelle WO2001025639A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU76887/00A AU7688700A (en) 1999-10-07 2000-09-27 Twin pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1999/21544U 1999-10-07
KR2019990021544U KR200198182Y1 (ko) 1999-10-07 1999-10-07 쌍원통 펌프

Publications (1)

Publication Number Publication Date
WO2001025639A1 true WO2001025639A1 (fr) 2001-04-12

Family

ID=19591347

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2000/001075 WO2001025639A1 (fr) 1999-10-07 2000-09-27 Pompe jumelle

Country Status (3)

Country Link
KR (1) KR200198182Y1 (fr)
AU (1) AU7688700A (fr)
WO (1) WO2001025639A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56118501A (en) * 1980-02-20 1981-09-17 Sankyo Seiki Mfg Co Ltd Rotary cylinder device
KR950033090U (ko) * 1994-05-20 1995-12-16 이한종 음료수 캔
US6059550A (en) * 1996-11-11 2000-05-09 Rha; Phil Chan Twin-cylinder impeller pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56118501A (en) * 1980-02-20 1981-09-17 Sankyo Seiki Mfg Co Ltd Rotary cylinder device
KR950033090U (ko) * 1994-05-20 1995-12-16 이한종 음료수 캔
US6059550A (en) * 1996-11-11 2000-05-09 Rha; Phil Chan Twin-cylinder impeller pump

Also Published As

Publication number Publication date
AU7688700A (en) 2001-05-10
KR200198182Y1 (ko) 2000-10-02

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