US3759638A - Sealing devices for rotary piston machines - Google Patents

Sealing devices for rotary piston machines Download PDF

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Publication number
US3759638A
US3759638A US00212176A US3759638DA US3759638A US 3759638 A US3759638 A US 3759638A US 00212176 A US00212176 A US 00212176A US 3759638D A US3759638D A US 3759638DA US 3759638 A US3759638 A US 3759638A
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US
United States
Prior art keywords
segment
lateral
support
radial
assembly
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.)
Expired - Lifetime
Application number
US00212176A
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English (en)
Inventor
M Brille
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.)
Renault SA
Original Assignee
Renault SA
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Filing date
Publication date
Application filed by Renault SA filed Critical Renault SA
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Publication of US3759638A publication Critical patent/US3759638A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids

Definitions

  • radial sealing segments are usually arranged to join up with the stator lobes, each lobe thus forming a combustion or compression chamber according to whether it is a case of an engine or a compressor.
  • These segments are generally completed by radial sealing segments. Lateral sealing shims ensure continuity of sealing between radial segments and lateral segments. All these sealing elements have the advantage of being mounted in the stator and of being fixed.
  • the object of the present invention is to derive the utmost benefit from this advantage with an arrangement which enables quick and easy changing of each segment, this changing being able to take place, if necessary, without stopping the machine, the latter continuing to rotate with the two lobes adjacent to the segment to be changed being put out of operation.
  • Another objectof the invention is to be able to adjust, during operation, the directional setting of the radial segment.
  • the device forming the subject matter of this invention is characterised by a cylindrical support angularly adjustable about its axis and comprising at one end a seating collar for accornodating a lateral sealing shim, whose outer face constitutes a closure bearing face,-and whose opposite face is extended over the full width of the rotor by a cylindrical shaped element truncated longitudinally substantially along a sector of its section and of the same outer diameter as the collar, a slot situated in the axial plane of said shaped element receiving a sealing segment whose contact profile, which is substantially cylindrical, has as pivot axis the same axis as the cylindrical outer bearing surface of the segment support formed by said collar and said shaped element.
  • the assembly formed by the segment support, the lateral shim, the radial segment, their resilient bearing means and the means for the angular setting of the seg ment is fitted into a corresponding cylindrically-walled cavity provided in the stator and a lateral-cheek, said assembly coming into resilient bearing contact against a lateral sealing shim situated in the opposite cheek.
  • An exterior thrust washer supporting the control means for the angular adjustment of the segment-holder assembly ensures that this assembly is maintained in resilient juxtaposition with the segment and with the lateral sealing shims.
  • Another object of the invention is to allow the dismantling of a defective assembly and the putting into position of a new assembly without the machine having to be stopped.
  • the cylindrical portion in the stator and the lateral cheek comprises a longitudinal dovetailed slot with which an equivalent slot in the oscillating support registers in the mean position.
  • the radial segment is kept sunk in at maximum clearance of the space swept by the surface of the rotor in its seating by means of beads of lowrnelting point material, such as wax, which are removed without residues and sunk into drilled holes having their axis on the lateral surface of contact of the segment with the corresponding surface of their seating in the support.
  • FIG. 1 is a view in axial section along the line II (FIG. 3) of a segment holder assembly in accordance with the invention mounted on the machine.
  • FIG. 2 is an end view of the same assembly showing the control members for adjusting the angular setting of the segment holder.
  • FIG. 3 is a section along the line III-III (FIG. 1) of a segment holder assembly in operation
  • FIG. 4 is a section similar to FIG. 3 of a segment holder in the course of being mounted on a machine in operation.
  • the segment holder support 1 is mounted in the seating of a stator 2 in which a rotor 3 rotates.
  • a radial sealing segment 4 bearing in an axial slot against pressure springs 5 (these springs could if necessary be of the same type as those used in french Patent No. 1,431,008 in the Applicants name) and there is also mounted a lateral sealing shim 6 with its pressure springs 7 and its screwed-in support cover 8.
  • a screwed-in plate 9 fitted into the end of the support 1 ensures that the segment 4 is held in position during the mounting operations.
  • the means for adjusting the inclination setting of the segment holder assembly 1 comprise a connecting sembly, after adjustment of the inclination of the segment holder assembly, on a bearing and locking washer 18.
  • This arrangement offers the advantage of an adjusting and locking device which forms a self-contained unit not requiring any special machining to the main components such as the cheek l9 and the stator, except for the threaded holes for fastening the screws 20. It likewise remains simple in production and with minimal space requirements.
  • the segment holder assembly is kept in its seating by the bearing washer 18 fixed on to one check 19 of the machine by screws 20.
  • the changing of worn parts is effected in respect of the lateral shim 23 by dismounting the cover 22.
  • the other parts i.e. the shim 6 and the segment 4 mounted in the support 1 in a self-contained assembly
  • a standard exchange of these assemblies is made for assemblies with new wear-prone parts kept in store.
  • the knurled knob 28 is detached from the threaded rod 25 and this latter is disengaged from the boss 29. This allows the dismounting of the component 10 after the nut 12 and the screw 15 have been removed. The removal of the washer 18 then allows the segment holder assembly to be withdrawn, which can be gripped by the rod 12.
  • the fillet 17 is inserted into the corresponding slot 16 in the stator cavity.
  • the segment 4 is previously kept sunk into its seating by means of plugs or beads 26 (FIG. 4) made of heat-destructible material such as wax which does not leave any deleterious residues, so as to remain temporarily clear of the line 27 bounding the space swept by the rotor 3.
  • the body 1 is then fitted by its corresponding slot 16 into the guide fillet l7 and sunk into the stator cavity.
  • the fillet 17 left projecting beyond the cheek 19 is then withdrawn and the closure washer 18 is replaced with the control means for adjusting the inclination.
  • the segment 4 comes into contact with the rotor surface and a new setting adjustment can be undertaken.
  • a replacement of the complete assembly can likewise be efiected very quickly after stoppage, by dismounting the screws 20, removing the complete assembly and putting into place a new assembly likewise comprising the washer 18 and the adjustment members.
  • the preceding procedure is no longer necessary but involves a stoppage of the machine for a very short time.
  • the segment holder assembly 1 pivots during the adjustments for setting the inclination, the shims 6 and 23, which are of the same diameter as the outer diameter of the segment holder and fit into the same bore of the cheeks 19 and 21, remain fixed because they are held in rotation by the ends of the lateral segments 30 (FIGS. 3 and 4) which are fitted into the shims.
  • the shims 6 and 23 comprise a concentric circular channel 31 which enables them to interlock against the portion 32 of the body 1 which forms the connection between the end seating collar and the truncated cylindrical zone forming the radial segment holder.
  • Sealing device for rotary piston machines of the type having radial segments adjusted in a support within the stator comprising as a detachable unit a segment holder support, a lateral shim and a radial segment, said segment holder support fitting in a cylindrically walled cavity open along axial direction of the rotary piston machine and having an axial slot in which the radial segment is disposed, a part of said holder support extending outside of te stator to form a sealing collar for a screwed-in cover, said lateral shim having approximately the same diameter as said collar and the cylindrically walled cavity for said holder support, and being disposed between said screwed-in cover and the part of the segment holder fitted in the stator, and first resilient spring means between said segment holder and said radial segment, and second resilient spring means between said cover and the lateral shim to press the radial segment and the lateral shim against the piston, in sealing connection.
  • a device as claimed in claim 1 in which temporary guide means are provided to ensure the insertion of the support into its cavity.
  • segment holder assembly comprises means for adjusting the angular setting of the segment holder assembly having the radial segment therein and means for locking the inclination of the segment holder assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Devices (AREA)
  • Rotary Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • General Details Of Gearings (AREA)
US00212176A 1971-01-05 1971-12-27 Sealing devices for rotary piston machines Expired - Lifetime US3759638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7100086A FR2120480A5 (enExample) 1971-01-05 1971-01-05

Publications (1)

Publication Number Publication Date
US3759638A true US3759638A (en) 1973-09-18

Family

ID=9069816

Family Applications (1)

Application Number Title Priority Date Filing Date
US00212176A Expired - Lifetime US3759638A (en) 1971-01-05 1971-12-27 Sealing devices for rotary piston machines

Country Status (4)

Country Link
US (1) US3759638A (enExample)
DE (1) DE2200248B2 (enExample)
FR (1) FR2120480A5 (enExample)
GB (1) GB1380050A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102297263A (zh) * 2011-06-30 2011-12-28 江苏科行环境工程技术有限公司 卧辊磨料床密封装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB997814A (en) * 1961-05-16 1965-07-07 Renault Improvements in or relating to rotary-piston engines
US3326455A (en) * 1965-05-14 1967-06-20 Gen Motors Corp Sealing means for rotary mechanisms
US3369739A (en) * 1966-04-30 1968-02-20 Kloeckner Humboldt Deutz Ag Rotary piston internal combustion engine, especially circular piston internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB997814A (en) * 1961-05-16 1965-07-07 Renault Improvements in or relating to rotary-piston engines
US3326455A (en) * 1965-05-14 1967-06-20 Gen Motors Corp Sealing means for rotary mechanisms
US3369739A (en) * 1966-04-30 1968-02-20 Kloeckner Humboldt Deutz Ag Rotary piston internal combustion engine, especially circular piston internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102297263A (zh) * 2011-06-30 2011-12-28 江苏科行环境工程技术有限公司 卧辊磨料床密封装置

Also Published As

Publication number Publication date
DE2200248A1 (de) 1972-08-10
FR2120480A5 (enExample) 1972-08-18
GB1380050A (en) 1975-01-08
DE2200248B2 (de) 1975-06-12

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