EP2088284A1 - Verfahren zum Entwerfen von Kolbenrotor - Google Patents

Verfahren zum Entwerfen von Kolbenrotor Download PDF

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Publication number
EP2088284A1
EP2088284A1 EP08151261A EP08151261A EP2088284A1 EP 2088284 A1 EP2088284 A1 EP 2088284A1 EP 08151261 A EP08151261 A EP 08151261A EP 08151261 A EP08151261 A EP 08151261A EP 2088284 A1 EP2088284 A1 EP 2088284A1
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EP
European Patent Office
Prior art keywords
arc
point
center
rotor
radius
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.)
Withdrawn
Application number
EP08151261A
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English (en)
French (fr)
Inventor
Heng-L Lin
Tien-Tung Chung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liung Feng Industrial Co Ltd
Original Assignee
Liung Feng Industrial Co Ltd
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 Liung Feng Industrial Co Ltd filed Critical Liung Feng Industrial Co Ltd
Priority to EP08151261A priority Critical patent/EP2088284A1/de
Priority to KR1020080019703A priority patent/KR100991503B1/ko
Publication of EP2088284A1 publication Critical patent/EP2088284A1/de
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/24—Rotary-piston machines or engines of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/123—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
    • F01C1/123—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type with tooth-like elements, extending generally radially from the rotor body cooperating with recesses in the other rotor, e.g. one tooth
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels

Definitions

  • the present invention relates to a method for designing lobe-type rotors, and particularly to a method for designing lobe-type rotors including a defined rotor and a conjugate rotor having one or multiple lobes intermeshing and conjugating to each other and to provide higher compression ratio and larger discharge capacity, moreover, reduce noise, leakage and vibration.
  • a lobe-type rotor generally includes a defined rotor and a conjugate rotor and is categorized into single-lobe type, double-lobe type, three-lobe type and so on.
  • the lobe-type rotor is applied to machines for operating in periodical expansion and compression by the defined rotor and the conjugate rotor intermeshing with each other.
  • U.S. Pat. Nos. 1,426,820 , 4,138,848 , 4,224,016 , 4,324,538 , 4,406,601 , 4,430,050 and 5,149,256 disclose relevant rotors.
  • the rotors of the prior arts have some defects that profiles of each lobe of the rotors is not formed by curves being continuously and smoothly connected; such defects cause tips of the rotors do not mesh completely with each other during operation. Consequently, in applying to machines needed for operating in periodical expansion and compression, the abnormal situations such as noise and vibration are generated in working chamber enclosed by a defined rotor, conjugate rotor and inner walls of cylinder. Moreover, unevenly intermeshing between the rotors tends to wear the rotors and therefore reduce the durability of the rotors.
  • a primary object of the present invention is to provide a method for designing lobe-type rotors including a defined rotor and a conjugate rotor, each of the defined rotor and the conjugate rotor having one or multiple lobes that can smoothly intermeshing and conjugating to each other in order to provide higher compression ratio and larger discharge capacity and reduce noise, leakage and vibration.
  • the method for designing lobe-type rotors of the present invention is capable of forming a defined rotor and a conjugate rotor, each having at least one lobe including a sharp portion and a base portion, wherein the sharp portion includes a curve E, arc A and arc B, which are produced by following steps:
  • the base portion of the single lobe of the defined rotor includes at least a curve E, an arc F and a straight line Y connecting the arc B, the base portion combining the sharp portion to form the single lobe of the defined rotor, whereby the defined rotor having more than three lobes can be produced by concentrically duplicating a profile of the single lobe to N-1 units then rotating the multiple lobes in succession at an angle of 360/N to (N-1)360/N (N indicates number of the lobes and is bigger than or equal to three), and a profile of the conjugate rotor can be produced by duplicating curves conjugate to the defined rotor's profile.
  • the base portion of the single lobe further includes an arc C, whereby a profile of the single lobe of the defined rotor is generated by connecting the curve E, the arcs A, B, F, C and the straight line Y, next mirror-symmetrically duplicates the profile about the center t1 to form the defined rotor of two lobes, thus a profile of the conjugate rotor is produced by connecting respective conjugate curves of the profile of the defined rotor including curve E, the arcs A, B, F, C and the straight line Y.
  • the profile of the single lobe further includes an arc C' and an arc G, wherein the arc C' is produced by following steps: designate a eighth point P8 located by symmetrically rotating the fourth point P4 about the center t1 to be in alignment with the fourth point P4 and the center t1, defining a center t4 with a radius r C measured from the fourth point P4 over the center t1, then designating a center t4' of the arc C' by symmetrically rotating the center t4 about the center t1, drawing an arc with the radius r C about the center t4' from the eighth point P8 to be tangent to the straight line Y at a sixth point P6, whereby the arc C' is defined as the arc between the points P6 and P8; and the arc G is defined with the radius r F , the center t1 and the fifth point P5 and the eighth point P8, whereby the arc C' smoothly connects the straight line Y
  • the arc F can be produced as well by following steps: take a center of the pitch circle of the conjugate rotor as a center t3, defining a third point P3 located at the horizontal line h1 and spaced the maximum radius R from the center t3, drawing an arc with the radius R at a central angle ⁇ of the center t3 from the third point P3 to end at a fourth point P4, whereby the arc F is defined as the arc between the third point P3 and the fourth point P4; and the arc C is produced by following steps: define a third line h3 by connecting the center t3 and the fourth point P4, designating a center t4 of the arc C located in an extending direction of the third line h3 with a radius r C from the fourth point P4, drawing an arc with the radius r C about the center t4 from the fourth point P4 to end at a fifth point P5 directly under the center t4, whereby the arc C is defined as the arc between the
  • the profile of the single lobe further includes an arc H and arc G, wherein the arc H is produced by following steps: designate a center t5 of the arc H by symmetrically rotating the center t4 about the center t1, the center t5 being in alignment with the center t1 and center t4, designating a sixth point P6 being spaced a distance r C away from and directly over the center t5, drawing an arc from the sixth point P6 with a the radius r C about the center t5 to end at a eighth point P8, the eighth point P8 being in alignment with the center t5 and the center t1, whereby the arc H is defined as the arc between the points P6 and P8; and the arc G is defined from the eighth point P8 to the fifth point P5 with a radius measured from the eighth point P8 to the center t1 , whereby the arc G smoothly connects the arc H and the arc C.
  • Fig. 1 is a schematic view showing a tip conjugate curve produced by a method for designing lobe-type rotors of the present invention
  • Fig. 2 is a schematic view showing a profile of a defined rotor of four lobes designed by the method of the present invention
  • Fig. 3 is a schematic view showing a profile of a conjugate rotor of four lobes designed by the method of the present invention
  • Fig. 4 is a schematic view showing variation of the profile of the four lobes when width D of the defined rotor is 45, 50, 55...80 mm and a central angle ⁇ is 6°;
  • Figs. 5 to 8 are embodiments of five lobes, six lobes, eight lobes and nine lobes of the defined rotor of the present invention
  • Fig. 9A is another embodiment showing a profile of three lobes of the defined rotor designed by the present invention.
  • Figs. 9B and 9C are another embodiments respectively showing a profile of two lobes of the defined rotor designed by the present invention.
  • Figs. 10A and 10B are embodiments respectively showing a profile of one single lobe of the defined rotor designed by the present invention.
  • a profile of the lobes of the defined rotor 1 is defined by following steps:
  • a profile of the conjugate rotor 2 is formed by duplicating the above-described steps through a conjugate curve portions profiled respectively from each arc and curve of the three-lobe of the defined rotor 1.
  • the maximum radius R of the defined rotor 1' is 60 mm
  • the pitch circle radius of the defined rotor 1' is 45 mm
  • width D of the defined rotor 1' is 45, 50, 55, 60 mm, respectively
  • the central angle ⁇ is 6°
  • the profile of the conjugate rotor 2' is subject to change to the profile of the defined rotor 1' such that is when the minimum width D of the defined rotor 1' is being minimum (S1'), the profile of the corresponding conjugate rotor 2' is being maximum.
  • applications can be vary depends on practical situations.
  • a method for designing the defined rotor and the conjugate rotor of more than 4 lobes is same as the method for designing 4 lobes as described in preceding paragraphs, wherein the only difference is that the angle of ⁇ of the arc F is defined by 360/N (N indicates number of the lobes), that is, ⁇ is 90° for 4 lobes, 72° for 5 lobes, 60° for 6 lobes, 45° for 8 lobes and 40° for 9 lobes.
  • the defined rotor and the conjugate rotor designed by the method of the present invention are applied to machines needed for operating in periodical expansion and compression, the defined rotor and the conjugate rotor smoothly intermesh and conjugate to each other and can provide higher compression ratio and secure a smooth operation process to further reduce noise and vibration. Moreover, because of the conjugate curve of the conjugate rotor is a smoothly curve-shape, the leakage can be reduced while working chambers undergoing compression and expansion so that to produce higher compression ratio and larger discharge capacity.
  • a method for designing the curve E, arc A and arc B of the sharp portion of each lobe is same as the method for design the defined rotor of four lobes as described in preceding paragraphs, wherein the differences are that the arc F and the straight line Y and the base portion further includes a arc C, arc C', curve H, and curve G.
  • the arc F and the straight line Y of the three lobes of defined rotor are produced by following steps:
  • the arc F, the arc C and the straight line Y of the defined rotor are produced by following steps:
  • the arc F, the arc C and the straight line Y of the defined rotor are produced by following steps:
  • the arc F, arc C and the straight line Y are designed by the same method as described above.
  • the profile of the lobe of the defined rotor further includes an arc C' and arc G, the arcs C' and G produced by following steps:
  • the arcs F and C and the straight line Y are designed by the same method as described above.
  • the profile of the single lobe of the defined rotor further includes an arc H which is produced by following steps:
EP08151261A 2008-02-11 2008-02-11 Verfahren zum Entwerfen von Kolbenrotor Withdrawn EP2088284A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08151261A EP2088284A1 (de) 2008-02-11 2008-02-11 Verfahren zum Entwerfen von Kolbenrotor
KR1020080019703A KR100991503B1 (ko) 2008-02-11 2008-03-03 로브형 로우터의 설계방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08151261A EP2088284A1 (de) 2008-02-11 2008-02-11 Verfahren zum Entwerfen von Kolbenrotor
KR1020080019703A KR100991503B1 (ko) 2008-02-11 2008-03-03 로브형 로우터의 설계방법

Publications (1)

Publication Number Publication Date
EP2088284A1 true EP2088284A1 (de) 2009-08-12

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EP08151261A Withdrawn EP2088284A1 (de) 2008-02-11 2008-02-11 Verfahren zum Entwerfen von Kolbenrotor

Country Status (2)

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EP (1) EP2088284A1 (de)
KR (1) KR100991503B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102536830A (zh) * 2012-02-15 2012-07-04 刘晋浩 自共轭转子
WO2011073674A3 (en) * 2009-12-17 2013-04-18 Epicam Limited A rotary device and a method of designing and making a rotary device
EP2719860A3 (de) * 2012-10-15 2015-12-30 Liung Feng Industrial Co Ltd Vorrichtung mit einem Paar Klauenrotoren mit den gleichen Profilen
EP3159136A3 (de) * 2015-10-21 2017-08-02 Macro Technology Inc. Gezahnter mischabschnitt für extruderschnecke
FR3103849A1 (fr) * 2019-11-29 2021-06-04 Alain Ratineau Convertisseur ou transmetteur d’énergie utilisant la dépression et la compression de fluide produites par deux rotors imbriqués

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1426820A (en) 1921-01-12 1922-08-22 Spokane Irrigation Pump Compan Rotary pump
GB1284552A (en) * 1969-08-08 1972-08-09 Arthur E Brown Improvements in rotary-positive displacement fluid machines
US4138848A (en) 1976-12-27 1979-02-13 Bates Kenneth C Compressor-expander apparatus
US4224016A (en) 1978-09-27 1980-09-23 Brown Arthur E Rotary positive displacement machines
US4324538A (en) 1978-09-27 1982-04-13 Ingersoll-Rand Company Rotary positive displacement machine with specific lobed rotor profiles
GB2113767A (en) * 1982-01-25 1983-08-10 Ingersoll Rand Co Rotary positive-displacement fluid-machines
US4406601A (en) 1981-01-02 1983-09-27 Ingersoll-Rand Company Rotary positive displacement machine
EP0456352A1 (de) * 1990-05-05 1991-11-13 Drum International Limited Umlaufende Verdrängungsmaschine
US6776594B1 (en) * 2003-06-02 2004-08-17 Liung Feng Industrial Co., Ltd. Rotor mechanism
US20070050065A1 (en) * 2005-08-31 2007-03-01 Liung Feng Industrial Co., Ltd. Methods for designing single-lobe rotors
US20070050056A1 (en) * 2005-08-31 2007-03-01 Liung Feng Industrial Co., Ltd. Methods for designing single-lobe and double-lobe rotors
US20070050066A1 (en) * 2005-08-31 2007-03-01 Liung Feng Industrial Co., Ltd. Methods for designing lobe-type rotors
US20070050055A1 (en) * 2005-08-31 2007-03-01 Liung Feng Industrial Co., Ltd. Methods for designing lobe-type rotors

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6041238B2 (ja) 1980-09-26 1985-09-14 株式会社神戸製鋼所 スクリュ−圧縮機のスクリュ−ロ−タ
US6139299A (en) 1998-05-29 2000-10-31 Carrier Corporation Conjugate screw rotor profile

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1426820A (en) 1921-01-12 1922-08-22 Spokane Irrigation Pump Compan Rotary pump
GB1284552A (en) * 1969-08-08 1972-08-09 Arthur E Brown Improvements in rotary-positive displacement fluid machines
US4138848A (en) 1976-12-27 1979-02-13 Bates Kenneth C Compressor-expander apparatus
US4224016A (en) 1978-09-27 1980-09-23 Brown Arthur E Rotary positive displacement machines
US4324538A (en) 1978-09-27 1982-04-13 Ingersoll-Rand Company Rotary positive displacement machine with specific lobed rotor profiles
US4406601A (en) 1981-01-02 1983-09-27 Ingersoll-Rand Company Rotary positive displacement machine
GB2113767A (en) * 1982-01-25 1983-08-10 Ingersoll Rand Co Rotary positive-displacement fluid-machines
US4430050A (en) 1982-01-25 1984-02-07 Ingersoll-Rand Company Rotary, positive-displacement machine
EP0456352A1 (de) * 1990-05-05 1991-11-13 Drum International Limited Umlaufende Verdrängungsmaschine
US5149256A (en) 1990-05-05 1992-09-22 The Drum Engineering Company Limited Rotary, positive displacement machine with specific lobed rotor profile
US6776594B1 (en) * 2003-06-02 2004-08-17 Liung Feng Industrial Co., Ltd. Rotor mechanism
US20070050065A1 (en) * 2005-08-31 2007-03-01 Liung Feng Industrial Co., Ltd. Methods for designing single-lobe rotors
US20070050056A1 (en) * 2005-08-31 2007-03-01 Liung Feng Industrial Co., Ltd. Methods for designing single-lobe and double-lobe rotors
US20070050066A1 (en) * 2005-08-31 2007-03-01 Liung Feng Industrial Co., Ltd. Methods for designing lobe-type rotors
US20070050055A1 (en) * 2005-08-31 2007-03-01 Liung Feng Industrial Co., Ltd. Methods for designing lobe-type rotors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011073674A3 (en) * 2009-12-17 2013-04-18 Epicam Limited A rotary device and a method of designing and making a rotary device
CN102536830A (zh) * 2012-02-15 2012-07-04 刘晋浩 自共轭转子
CN102536830B (zh) * 2012-02-15 2015-01-21 刘晋浩 自共轭转子
EP2719860A3 (de) * 2012-10-15 2015-12-30 Liung Feng Industrial Co Ltd Vorrichtung mit einem Paar Klauenrotoren mit den gleichen Profilen
EP3159136A3 (de) * 2015-10-21 2017-08-02 Macro Technology Inc. Gezahnter mischabschnitt für extruderschnecke
FR3103849A1 (fr) * 2019-11-29 2021-06-04 Alain Ratineau Convertisseur ou transmetteur d’énergie utilisant la dépression et la compression de fluide produites par deux rotors imbriqués

Also Published As

Publication number Publication date
KR100991503B1 (ko) 2010-11-04
KR20090094634A (ko) 2009-09-08

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