WO1996024754A1 - Machine volumetrique a palettes - Google Patents
Machine volumetrique a palettes Download PDFInfo
- Publication number
- WO1996024754A1 WO1996024754A1 PCT/FR1996/000210 FR9600210W WO9624754A1 WO 1996024754 A1 WO1996024754 A1 WO 1996024754A1 FR 9600210 W FR9600210 W FR 9600210W WO 9624754 A1 WO9624754 A1 WO 9624754A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- curvature
- radius
- imposed
- equations
- solutions
- Prior art date
Links
Classifications
-
- 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
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/104—Stators; Members defining the outer boundaries of the working chamber
- F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
Definitions
- the object of the invention is a volumetric machine with mobile sealing elements comprising at least one capsulism essentially comprising a capsule consisting of a cylindrical tubular part with non-circular director and two end flanges, a cylindrical piston of which the directrix is a circle with center O and radius R p , provided with grooves guiding the sealing elements in the piston, this piston being in rotoidal connection with the capsule around its axis, as well as a fluid distribution system allowing its admission and its exhaust.
- the mobile sealing elements are most often pallets but can be rollers.
- the director of the tubular part of the capsule, called the capsule profile is formed, successively and
- n arcs of a circle called arcs of conformity, possibly zero angular opening, center O and radius R p + J, J designating the radial clearance between these arcs and the director of the piston, as well as n geometric arcs called hoops, limiting in the centrifugal direction the movement of the sealing elements in the grooves.
- Each arch has, with the adjacent conforming arcs, two connection points Mj and Mf in which the radii of curvature are respectively equal to R c j and R c f and in which the angles of the tangents, ⁇ i and ⁇ f respectively , differ by ⁇ / 2 from the corresponding polar angles ⁇ i and ⁇ f; each hoop also contains a point M e in which the polar radius is maximum, equal to Rp + J + H, in which the angle of the tangent ⁇ e differs from ⁇ / 2 from the corresponding polar angle ⁇ e and in which the radius of curvature R ce is less than R p .
- the invention presupposes that the following geometric data are imposed a priori: R p , n, H / R p , J, ⁇ i , ⁇ e , ⁇ f , to which we can add at most the radii of curvature R ci , Rc e and R cf.
- the H / R p ratio is imposed as large as possible to reduce the size of the machine; this ratio is however limited by the possibility of materializing the grooves in the piston, which is all the more difficult as the value of n is low, and by the need to obtain a profile which has a radius at each of its points of sufficient curvature, in particular to ensure contact between the sealing element and the capsule with a Hertz pressure as low as possible, and which has a sufficient curvature to prevent the re-entry of the sealing elements in the piston under the combined action of fluid pressure and inertia reactions; - the game J is imposed by technological and economic considerations;
- - ⁇ e can be equal to ( ⁇ j + ⁇ f ) / 2 or deviate from this value, in particular to make asymmetrical the inertia reactions on the arc M i M e and on the arc M i M e , thus allowing, to a certain extent, the regularization of the engine torque; in this perspective, the point M e will most often be brought closer to the point Mj (2 ⁇ e ⁇ ⁇ i + ⁇ f ) when the fluid is on average at lower pressure on the arc MjMe than on the arc MeMf and we will approach most often the point M e of the point Mf (2 ⁇ e ⁇ ⁇ i + ⁇ f ) in the opposite case; it can be observed that the asymmetry of the arcs MjM e and M i M e must be lower the higher the values of n and H / R p ;
- the machines according to the invention have a capsule profile of which an arch has an intrinsic equation, that is to say expressed independently of any reference:
- ⁇ a denote a set of a shape parameters of the arch, ⁇ 1 , ..., ⁇ b a set of b shape parameters of the arch, these shape parameters being sufficiently large so that the developed of the arch in the vicinity of the point M e has, at the accuracy ⁇ near less than or equal to 1 ⁇ m, an angular point D e , which results in the following two conditions:
- the A ⁇ denote a set of a geometric parameters
- the Bp a set of b geometric parameters
- the a + b geometric parameters A ⁇ 1 , ..., A ⁇ a , B ⁇ 1 , ...,
- the designer is in the context of a compromise between the need to have as regular a variation as possible in the curvature on the arcs M i M e and M i M e respectively and the search for a radius of curvature as large as possible, with as little variation as possible, in the vicinity of point M e , over the greatest possible angular opening.
- the invention can be applied according to one of the following seven variants which all have the advantage of a reduction the number of parameters to choose. It is remarkable to note that in these variants, the calculated value of any radius of curvature not imposed at one of the points M i , M e or Mf is automatically that which gives the lowest possible average curvature on the arcs M i M e or M e M f as appropriate, taking into account the other constraints imposed a priori.
- a ⁇ a , B ⁇ 1 , ..., B ⁇ b are solutions of the system made up of the eight equations (II) to (IX).
- a ⁇ a , B ⁇ 1 , ..., B ⁇ b are solutions of the system made up of the seven equations (II) to (VIII);
- R cf is then calculated from equation (I) where we replaced x by ⁇ f .
- equation (I) where we replaced x by ⁇ f .
- the first possibility is preferably used when 2 ⁇ e ⁇ ⁇ i + ⁇ f and the second when 2 ⁇ e ⁇ ⁇ i + ⁇ f .
- the first possibility is preferably used when 2 ⁇ e ⁇ ⁇ i + ⁇ f and the second when 2 ⁇ e ⁇ ⁇ i + ⁇ f .
- the table below specifies, for the different possible combinations of the values of the parameters a and b, if the radii of curvature R ci , Rce and Rcf must be imposed a priori, if they are calculated from equation (I ) or if they are solutions, with the geometric parameters A ⁇ 1 , ..., A ⁇ a , B ⁇ 1 , ..., B ⁇ b , of the system of equations (II) to (VII) possibly supplemented by the equations ( VIII) and (IX).
- the last column of this table indicates the numbers of the equations of this system.
- Figure 1 illustrates by way of example a rotary vane compressor in accordance with the invention.
- Figures 2, 3 and 4 completely or partially show the outline of the capsule corresponding to the compressor illustrated in figure 1.
- Figure 1 shows a cross section in the compressor used as an example.
- the tubular part (1) of the fixed capsule the piston (2), the circular director (20) of its outer surface and the five grooves such as (3) each guiding a pallet such as (4) , the point of piercing O of the axis common to the capsule, to the piston and to their rotoid connection, the two intake ports such as (5), the two exhaust ports such as (6) and their valves such that (7).
- the tubular part of the capsule (1) is internally limited by a cylindrical surface whose non-circular director (10) is the capsule profile.
- the direction of rotation of the piston around its axis is indicated by the arrow.
- a first arch of the capsule profile is limited by the points M i and M f ; the polar radius increases monotonously on this hoop from point M i to point M e and decreases monotonically from point M e to point Mf.
- the distance between point O and point M e is equal to (Rp + J + H).
- the points M i , M e and M f are identified on the arch by the respective angles ⁇ i , ⁇ e and ⁇ f .
- a first conformance arc originates from point M f and ends from point M ' i .
- the second arch extends from point M ' i to point M' f and contains the symmetrical point M ' e from point Me to point O.
- the second conformance arc originates from point M ' f and ends from point M i .
- the capsule profile is to be defined for the following geometric data:
- This profile must therefore be defined by five shape parameters and, since
- the radius of curvature R ci at point Mj is equal to 89.847 mm.
- the radius of curvature R cf at point M f is equal to 47.234 mm.
- the radius of curvature is between 30 mm and 25.990 mm.
- Figure 3 an arch, the two conforming arcs of the capsule profile shown in Figure 2 and the development of this arch on which there is the angular point D e as well as the points Dj and Df, respective centers of curvature of the roll bar at points M e , M i and M f .
- FIG. 4 represents on an enlarged scale part of the developed shown in FIG. 3 as well as its two tangents at the angular point D e which determine an angle of 36 °, equal to the angle ⁇ d - ⁇ m .
- the ratio of these forces to those that the pallet would undergo if the capsule profile were at each of its points replaced by the circle with the same polar radius is equal to 1.18.
- the displacement of the compressor, a cross section of which is represented in FIG. 1, calculated from the chamber of maximum accessible volume, for pallets of thickness equal to 4 mm and a capsule width of 54 mm, is 172 cm. 3 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Reciprocating Pumps (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96903072A EP0808412B1 (fr) | 1995-02-10 | 1996-02-08 | Machine volumetrique a palettes |
DE69600922T DE69600922T2 (de) | 1995-02-10 | 1996-02-08 | FlÜGELZELLENMASCHINE |
US08/875,874 US5888058A (en) | 1995-02-10 | 1996-02-08 | Positive displacement machine having rotating vanes and a non-circular chamber profile |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR95/01557 | 1995-02-10 | ||
FR9501557A FR2730528B1 (fr) | 1995-02-10 | 1995-02-10 | Machine volumetrique a elements mobiles d'etancheite et profil de capsule a variation optimale de courbure |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1996024754A1 true WO1996024754A1 (fr) | 1996-08-15 |
WO1996024754A9 WO1996024754A9 (fr) | 1997-01-16 |
Family
ID=9476031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/000210 WO1996024754A1 (fr) | 1995-02-10 | 1996-02-08 | Machine volumetrique a palettes |
Country Status (5)
Country | Link |
---|---|
US (1) | US5888058A (fr) |
EP (1) | EP0808412B1 (fr) |
DE (1) | DE69600922T2 (fr) |
FR (1) | FR2730528B1 (fr) |
WO (1) | WO1996024754A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050136201A1 (en) * | 2003-12-22 | 2005-06-23 | Pepsico, Inc. | Method of improving the environmental stretch crack resistance of RPET without solid stating |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3231588A1 (de) * | 1981-08-26 | 1983-07-14 | Hitachi, Ltd., Tokyo | Drehschieber-rotationsmaschine |
US4480973A (en) * | 1981-07-13 | 1984-11-06 | Diesel Kiki Co., Ltd. | Vane compressor provided with endless camming surface minimizing torque fluctuations |
US4501537A (en) * | 1981-10-23 | 1985-02-26 | Diesel Kiki Co., Ltd. | Vane compressor having an endless camming surface minimizing torque fluctuations |
DE3800324A1 (de) * | 1987-01-09 | 1988-07-21 | Diesel Kiki Co | Fluegelzellenverdichter |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57108484A (en) * | 1980-12-24 | 1982-07-06 | Mitsubishi Motors Corp | Pulsation-preventing pressure-balancing type vane pump |
JPS61268894A (ja) * | 1985-05-22 | 1986-11-28 | Diesel Kiki Co Ltd | ベ−ン型圧縮機 |
-
1995
- 1995-02-10 FR FR9501557A patent/FR2730528B1/fr not_active Expired - Fee Related
-
1996
- 1996-02-08 DE DE69600922T patent/DE69600922T2/de not_active Expired - Fee Related
- 1996-02-08 WO PCT/FR1996/000210 patent/WO1996024754A1/fr active IP Right Grant
- 1996-02-08 US US08/875,874 patent/US5888058A/en not_active Expired - Fee Related
- 1996-02-08 EP EP96903072A patent/EP0808412B1/fr not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4480973A (en) * | 1981-07-13 | 1984-11-06 | Diesel Kiki Co., Ltd. | Vane compressor provided with endless camming surface minimizing torque fluctuations |
DE3231588A1 (de) * | 1981-08-26 | 1983-07-14 | Hitachi, Ltd., Tokyo | Drehschieber-rotationsmaschine |
US4501537A (en) * | 1981-10-23 | 1985-02-26 | Diesel Kiki Co., Ltd. | Vane compressor having an endless camming surface minimizing torque fluctuations |
DE3800324A1 (de) * | 1987-01-09 | 1988-07-21 | Diesel Kiki Co | Fluegelzellenverdichter |
Also Published As
Publication number | Publication date |
---|---|
FR2730528A1 (fr) | 1996-08-14 |
DE69600922T2 (de) | 1999-07-29 |
EP0808412A1 (fr) | 1997-11-26 |
FR2730528B1 (fr) | 1997-04-30 |
US5888058A (en) | 1999-03-30 |
EP0808412B1 (fr) | 1998-11-04 |
DE69600922D1 (de) | 1998-12-10 |
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