US3326454A - Sealing segments for rotary engines - Google Patents

Sealing segments for rotary engines Download PDF

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Publication number
US3326454A
US3326454A US452468A US45246865A US3326454A US 3326454 A US3326454 A US 3326454A US 452468 A US452468 A US 452468A US 45246865 A US45246865 A US 45246865A US 3326454 A US3326454 A US 3326454A
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United States
Prior art keywords
groove
segment
valve member
flanges
members
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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 - Lifetime
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US452468A
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English (en)
Inventor
Castelet Gaetan De Coye De
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Renault SAS
Regie Nationale des Usines Renault
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Renault SAS
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Publication date
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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
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/10—Sealings for working fluids between radially and axially movable parts
    • 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
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/02—Radially-movable sealings for working fluids

Definitions

  • This invention relates to rotary engines of the type wherein a rotor performs within a stationary stator a simple or complex rotary motion and more particularly to improvements in segments, packings or like means for sealing the radial joints between said rotor and stator.
  • variable-volume working chambers are provided which are bounded by the inner contour of the stator, on the one haid, and by the outer contour of the rotor, on the other hand.
  • the radial tightness that is, the separation of two adjacent working chambers, is obtained by means of segments or strips fitted in grooves formed either in the stator at the junction of two adjacent lobes or in the rotor along each ridge, according to the type of engine considered, these segments or strips engaging the conjugate contour of the rotor or stator along a generatrix.
  • the segments or strips are urged against the opposite member by springs or any other suitable means exerting their force on the segment edge opposite to their bearing surface, and also by the pressure of the gas acting on said surface.
  • This gas pressure also causes the segment to be urged against the lateral wall of the groove which is opposite to the side face of the segment which is acted upon by said gas, thus providing, at least theoretically, a perfect fluid tightness.
  • the two contacking surfaces are not geometrically plane as they are marked by machining operations and subjected to distortion, notably under the influence of heat.
  • This member may be solid or not with the segment and may be embodied in different manners as will be explained hereinafter with reference to the accompanying drawing, in which:
  • FIGURE 1 shows the conventional segment mounting
  • FIGURE 2 shows a first arrangement according to this invention wherein the segment is provided with a metal valve-forming member having the shape of an inverted U.
  • FIGURE 3 shows the same valve as in the preceding form of embodiment but in its unstressed condition
  • FIGURE 4 shows another arrangement according to this invention wherein a segment is provided with a valve member similar to the preceding one but made from suitable plastic material, and
  • FIGURE 5 shows a third alternate form of embodiment of this invention wherein the side faces of the segment have valve-forming metal blade-like extensions.
  • FIGURE 1 showing a conventional segment mounting the segment 1 fitted in a groove 2 of member 3 (the latter being the stator or the rotor, according to the type of engine contemplated) is urged against the other member 4 (rotor or stator) by springs 5 (or any other suitable return means).
  • the segment If the gas pressure is exerted on the left-hand side of the segment as shown by the arrow p, the segment is pressed against the right-hand lateral wall of its groove and the small gap 1' thus left between the left-hand side of the segment and the left-hand wall of the groove permits the ingress of gas to the bottom of this groove, the action of this gas adding itself to that of the springs 5 to urge the segment against the rotor (or stator) surface.
  • FIGURE 2 illustrates a first arrangement according to this invention.
  • FIGURE 1 designate the segment 1 in its groove 2, the stator (or rotor) 3, the rotor (or stator) 4, and the springs or like means 5.
  • valve member 6 having substantially the shape of an inverted U is interposed.
  • This valve member as shown in FIGURE 3, is cut and pressed from spring-grade strip-steel, the width L of the U-shaped member as measured across the outer edges of its side flanges being greater in the free state than the width l of the groove 2, whereby the two flanges of the U-shaped member are urged against the groove walls when fitted therein.
  • the valve member may be either secured to the segment along its base de through any known means or left independent thereof.
  • FIGURE 4 illustrates a construction similar to the one shown in FIGURE 2, wherein instead of a metal valve member a plastic valve member made from an elastic material adapted to withstand the action of gases and hydrocarbons is used.
  • valve member 7 has the same general configuration as valve member 6, the only difference lying in the thicknesses which are consistent with the type of material utilized in its manufacture.
  • FIGURE 5 illustrates a third form of embodiment wherein the metal valve member of FIGURE 2 is replaced with two separate blades constituting the extensions of the side faces of the segment.
  • These blades 8, 9 consist of spring-grade strip steel.
  • each lateral groove and the inner edge of the segment the thickness of the segment is reduced, so that the outer face of each blade in its operative position be coplanar with the corresponding side face of the segment.
  • a rotary engine having a rotor and a stator moving relative to each other wherein the improvement comprises at least one groove formed in one of said members, at least one sealing segment adapted to seal the radial joint between said members to form at least two chambers, said segments each being fitted in a corresponding groove with a clearance defined between one wall of the groove and said segment, resilient means disposed in the bottom of said groove for urging said segment against the other of said members and permitting slight reciprocal movement of said segment within said groove, and a valve member disposed between each segment and its'corresponding resilient means in the bottom of said groove, said valve member having two flanges of a resilient material extending towards the bottom of said groove, the distance between the free ends of said flanges being greater in the free state than the width of said groove so that said flanges are normally urged against the corresponding wall of said groove so that said valve member acts as a one-way check valve permitting flow of gas from a chamber into the bottom portion of said groove but preventing flow from the bottom portion of said groove to said chamber.
  • valve member is U-shaped.
  • valve member is made from strip-steel.
  • valve member is adapted to withstand the action of gases and hydrocarbons.
  • a rotary engine having a rotor and a stator moving relative to each other wherein the improvement comprises 30 at least one groove formed in one of said members, at least one sealing segment adapted to seal the radial joint between said members to form two chambers, said segments each being fitted in a corresponding groove with a clearance defined between one wall of the groove and said segment, resilient means disposed in the bottom of said groove for urging said segment against the other of said members and permitting slight reciprocal movement of said segment within said groove, and two valve members each having a flange of a resilient material extending towards the bottom of said groove and each having a ledge engaging a corresponding groove formed in said segments, the distance between the :free ends of said flanges being greater in the free state than the width of said groove so that said flanges are normally urged against the corresponding wall of said groove so that said valve members act as a one-way check valve permitting fiow of gas from a chamber into the bottom portion of said groove but preventing flow from the bottom portion of said groove to said chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)
US452468A 1964-05-09 1965-05-03 Sealing segments for rotary engines Expired - Lifetime US3326454A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR973897A FR1403098A (fr) 1964-05-09 1964-05-09 Perfectionnements aux segments d'étanchéité pour moteurs rotatifs

Publications (1)

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US3326454A true US3326454A (en) 1967-06-20

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US452468A Expired - Lifetime US3326454A (en) 1964-05-09 1965-05-03 Sealing segments for rotary engines

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US (1) US3326454A (fr)
FR (1) FR1403098A (fr)
OA (1) OA01721A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447477A (en) * 1967-06-22 1969-06-03 Sperry Rand Corp Power transmission
US3730655A (en) * 1970-11-14 1973-05-01 Daimler Benz Ag Sealing bar for a rotary piston internal combustion engine
US3881848A (en) * 1971-08-04 1975-05-06 Dornier System Gmbh Packing strip arrangement for highly superheated gases in engines and other working machines
US3894519A (en) * 1973-05-31 1975-07-15 George W Moran Rotary internal combustion engine
US4008986A (en) * 1975-12-22 1977-02-22 Caterpillar Tractor Co. Corner seal for rotary mechanisms

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US674258A (en) * 1900-03-16 1901-05-14 Thomas Croston Rotary engine.
US723656A (en) * 1899-07-14 1903-03-24 Hugh Thomas Dunn Rotary engine.
US2189976A (en) * 1937-01-27 1940-02-13 Lavaud Dimitrl Sensaud De Rotary engine
US2880045A (en) * 1957-04-24 1959-03-31 Nsu Werke Ag Seals for working spaces of rotary piston machines
US3033180A (en) * 1960-01-29 1962-05-08 Curtiss Wright Corp Rotating combustion engine seal construction
US3140902A (en) * 1958-06-17 1964-07-14 John A Herbst Hydraulic actuator shaft, bearing and seal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US723656A (en) * 1899-07-14 1903-03-24 Hugh Thomas Dunn Rotary engine.
US674258A (en) * 1900-03-16 1901-05-14 Thomas Croston Rotary engine.
US2189976A (en) * 1937-01-27 1940-02-13 Lavaud Dimitrl Sensaud De Rotary engine
US2880045A (en) * 1957-04-24 1959-03-31 Nsu Werke Ag Seals for working spaces of rotary piston machines
US3140902A (en) * 1958-06-17 1964-07-14 John A Herbst Hydraulic actuator shaft, bearing and seal
US3033180A (en) * 1960-01-29 1962-05-08 Curtiss Wright Corp Rotating combustion engine seal construction

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447477A (en) * 1967-06-22 1969-06-03 Sperry Rand Corp Power transmission
US3730655A (en) * 1970-11-14 1973-05-01 Daimler Benz Ag Sealing bar for a rotary piston internal combustion engine
US3881848A (en) * 1971-08-04 1975-05-06 Dornier System Gmbh Packing strip arrangement for highly superheated gases in engines and other working machines
US3894519A (en) * 1973-05-31 1975-07-15 George W Moran Rotary internal combustion engine
US4008986A (en) * 1975-12-22 1977-02-22 Caterpillar Tractor Co. Corner seal for rotary mechanisms

Also Published As

Publication number Publication date
OA01721A (fr) 1969-12-15
FR1403098A (fr) 1965-06-18

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