EP0277114A1 - Machine a refoulement. - Google Patents

Machine a refoulement.

Info

Publication number
EP0277114A1
EP0277114A1 EP86904164A EP86904164A EP0277114A1 EP 0277114 A1 EP0277114 A1 EP 0277114A1 EP 86904164 A EP86904164 A EP 86904164A EP 86904164 A EP86904164 A EP 86904164A EP 0277114 A1 EP0277114 A1 EP 0277114A1
Authority
EP
European Patent Office
Prior art keywords
displacement
recess
sealing
rotor
displacer
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.)
Granted
Application number
EP86904164A
Other languages
German (de)
English (en)
Other versions
EP0277114B1 (fr
Inventor
Wolfhart Willimczik
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT86904164T priority Critical patent/ATE59431T1/de
Publication of EP0277114A1 publication Critical patent/EP0277114A1/fr
Application granted granted Critical
Publication of EP0277114B1 publication Critical patent/EP0277114B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01C3/00—Rotary-piston machines or engines with non-parallel axes of movement of co-operating members
    • F01C3/06—Rotary-piston machines or engines with non-parallel axes of movement of co-operating members the axes being arranged otherwise than at an angle of 90 degrees

Definitions

  • the invention relates to a positive displacement machine in a rotary lobe type, which consists of a housing closed by a cover, which contains a rotor with displacement surfaces with which a seal is in positive engagement and rotates.
  • the displacement surfaces sealingly engage in a recess which forms the working space and is concentric with the axis of rotation of the rotor and which is introduced into the end face of the housing facing the rotor.
  • the end face includes an angle deviating from 90 ° with the axis of rotation of the rotor, so that the cross-sectional area of the rotation changes between a maximum and a minimum value.
  • the seal rotates on the inclined end face of the housing about an axis that is inclined towards the axis of rotation of the rotor and about an axis.
  • Such a displacement machine is e.g. from the
  • DE-PS 29 13 608 known. It can run in both directions of rotation either as a pump or as a motor with any, even highly viscous and / or abrasive media. Four blades are formed on the rotor, the parts of which extend into the recess form the displacement surfaces.
  • Wings of the rotor reach through slots in the seal designed as a disk, so that this slotted sealing disk is taken along when the rotor rotates.
  • a kinematic problem arises because the shaft of the rotor and the axis around which the disc-shaped seal rotates enclose a (small) angle with each other, so that the right angle between successive blades of the rotor is when projected onto the plane in which the seal rotates, i.e. when projected onto the inclined end face of the housing, depending on the respective rotational position between an under 90 ° and a value above 90 ° changes.
  • As is well known, only the angle of 180 ° remains unchanged with a five-angle projection).
  • the invention has for its object to provide a positive displacement machine of the type specified in the introduction, which avoids the above-mentioned problems while maintaining the same working principle and opens up an even larger area of application for the machine.
  • the rotor is a displacement body which fills and covers the recess, with at least one recess corresponding to a section of the displacement body along an axis-parallel surface which intersects the recess, the surface parts of the recess extending into the recess
  • Displacer form the displacement surfaces.
  • the displacer body - as seen from above - has the outline of a polygon, the sides of which form the displacer surfaces.
  • the surface producing the recess is a surface of rotation body, preferably a cylindrical surface.
  • the axis of the generating body of revolution can lie outside, in or within the recess, so that the recess is located on the outer circumference, in the displacer or on its inner circumference.
  • the displacer body then has an outline similar to a sprocket wheel when viewed from above, in the latter case the corresponding outline on the inner circumference, while the recess or the recesses have the shape of holes in the displacer body when the axis of the producing rotating body lies within the recess .
  • the curved, arcuate shape which the recesses have in the former and in the latter case, allows a larger width of the recess in the housing and thus a larger working volume compared to a flat design of the recesses.
  • the recess has the shape of an annular groove of basically any suitable profile.
  • the boring can also extend as far as a shaft that is connected to the displacer body in a rotationally fixed manner, so it then has no inner wall formed by the material of the housing.
  • This embodiment can be further developed in such a way that the recess is in the form of a spherical shell and that the shaft which is connected to the displacement body in a rotationally fixed manner is pivotably mounted in the housing.
  • the displacement machine has a chamber volume which can be changed during operation and which increases with increasing angle between the drive shaft of the displacement body and the axis around which the sealing bodies rotate.
  • the machine can then be used to convert hydraulic and pneumatic quantities, e.g. use to increase pressure or as a hydraulically driven pump or compressor.
  • the drive shaft of the displacement body can be omitted here.
  • a sealing body is arranged in each recess, which is held in a linear contact with the assigned displacement surfaces and rotates with them.
  • the sealing bodies are circular disks or cylinders which rotate at an incline to the shaft of the rotor and rotate slowly as a result of the different frictional forces acting on their inner and outer circumference. This favors the running-in process between those involved
  • the sealing bodies can be held in contact with the displacement surfaces by a common clamping ring, especially if the recesses are provided on the outer circumference of the displacement body.
  • An improvement is that between the clamping ring and the sealing bodies additional resilient elements are arranged, which individually load the sealing body.
  • the sealing bodies must have hydrostatic relief bores that connect sealed pockets of approximately the same size on opposite large surfaces of the sealing bodies.
  • the independently movable sealing bodies can be connected in the region of their cover-side end face by preferably elastic webs to form a one-piece molded part, since the movements which the individual sealing bodies perform relative to one another at the small oblique angles used in practice of usually less than 10o are very small.
  • the individual seals can also be combined and connected to an external shaft.
  • the displacement machine offers the possibility of contactless drive, in particular in the embodiment with displacement surfaces formed inside the displacement body or on its inner circumference, e.g. by embedding permanent magnets in the area of the outer circumference of the displacement body or by designing it as a short-circuit rotor of an electric motor.
  • the displacement machine proposed here has a very wide range of applications, from pumps and compressors for liquids and gases to compressed air motors,
  • Retarders, flow meters, hydrostatic couplings and positive displacement turbines can be enough. Combinations are also possible, not only of the individual exemplary embodiments with one another, but also with other machines, such as a turbomachine, in such a way that the displacement body is designed on its outer circumference as an impeller of a centrifugal pump or as a turbine wheel.
  • FIG. 1 shows a perspective illustration of a first embodiment with a three-surface displacement body
  • Figures 2a, 2b the first embodiment in section and in supervision
  • Figure 3a, 3b a second embodiment with a four-surface displacement body in section and in top view
  • FIGS. 4a, 4b show a further development of the first embodiment in section and in supervision, which is suitable for particularly high pressures
  • FIGS. 5a, 5b show a further development of the first embodiment in section and in supervision, which is improved with regard to the delivery rate and can be used for high pressures,
  • FIGS. 6a, 6b a three-surface displacement body with straight or concave displacement surfaces
  • FIGS. 7a, 7b show a four-surface displacement body with straight or concave displacement surfaces, a sealing body resting on a displacement surface, FIGS. 8a, 8b a five-surface displacement body with straight or concave displacement surfaces,
  • FIGS. 9a to 9c show a section through three embodiments of the sealing body in FIG. 7b along the line A-A,
  • FIG. 10 shows a top view of an embodiment of an outer clamping ring, for use in connection with a four-surface displacement body
  • 11a, 11b show a third embodiment of the displacement machine with a variable delivery volume in section and in supervision
  • FIGS. 12a, 12b show a fourth embodiment of the displacement machine with a particularly low degree of pulsation in section and in supervision
  • FIG. 13 shows a fifth embodiment in top view, in which the displacement body can be driven electromagnetically (without contact),
  • FIGS. 14a, 14b a sixth embodiment in section and in supervision
  • FIG. 15a shows a section through a sealing body for the sixth embodiment
  • FIG. 15b shows a section through a deviation of the sealing body
  • Figures 16a, 16b a seventh embodiment of the displacement machine in section and in supervision, with two mutually concentric ring grooves.
  • the displacement machine illustrated in FIGS. 1 to 2b consists of a housing 1 closed by a cover 2, in which a shaft 3 is mounted, which is connected in a rotationally fixed manner to a displacement body 4.
  • the displacer 4 which is additionally shown in the right part of Figure 1 in two side views and a top view, runs in a recess 5 of the housing 1, the shape of which can be imagined as being created by the fact that first a running to the bore of the shaft 3 Cone is rotated concentrically to this bore and then this surface is removed obliquely so far that the drawn, the recess 5 containing, inclined Sti'rn Chemistry 6 of the housing 1 is formed.
  • the cover 2 is placed on this end face 6 and screwed to it.
  • the displacer body 4 has the shape of an equilateral triangle when viewed from above, the side faces of which partially dip into the recess 5 and form the displacer surfaces 4a.
  • a sealing body 7 is assigned to each displacement surface 4a.
  • the sealing bodies 7 run with their lower surface area on the end face 6 of the housing 1. Their side surfaces facing the displacement surfaces 4 are chamfered in such a way that there is a space between each displacement surface 4a and the associated sealing body 7 Line contact along the edge 7a at the level of the end face 6 of the housing 1 results.
  • a clamping ring 8 holds the sealing bodies 7, which are approximately circular segment-shaped in plan view, with their straight edges 7a in contact with the respective displacer surfaces of the displacer body 4. In order to keep the tilting moment as small as possible, the clamping ring 8 on the circumference of the circular segment-shaped sealing body 7 is as close as possible to the lower one Large area arranged where the corresponding counterforce acts on the sealing edges 7a.
  • An inlet channel 9 opens into the recess 5
  • Cover 2 contains an outlet channel 10.
  • the recess 5 and the lower large surfaces of the sealing bodies 7 delimit a working space, the cross section of which is a maximum at the circumferential point 11 and a minimum at the circumferential point 12 (zero in the example shown).
  • the outlet channel 10 is arranged on the outside of the cover 2 also results in a certain centrifugal pump effect.
  • the sealing bodies 7 revolve around an axis of rotation 13 which, according to FIG. 2a, forms a small angle ⁇ with the drive shaft 3 of the displacer 4 (namely the angle by which the end face 6 deviates from a plane perpendicular to the shaft 3), the exactly straight sealing edges 7a of the sealing body 7 in every rotational position in contact with the relevant exactly flat displacement surface 4a.
  • This embodiment of the displacement machine is suitable because of its high tightness as a pump for small and very small flow rates, is safe to run dry when depressurized and has a high suction capacity.
  • the displacement machine can e.g. B. can be used as a pump for windshield washer systems, as a lubricating oil pump or as a vacuum pump. The wearing surfaces all adjust themselves.
  • the displacer body 34 is approximately square when viewed from above, that is to say has four displacer surfaces 34a, with which four correspondingly circular sealing bodies 37 interact in the plan view.
  • a cylindrical recess 35 is provided as the housing-side boundary of the working space.
  • the recess 35 can also be regarded as an annular groove concentric with the drive shaft 33 with an inner diameter equal to zero or with a groove base extending up to the shaft 33.
  • the position of the outlet channel 310 in the cover 32 is basically arbitrary.
  • the sealing bodies 37 held by a common, elastic clamping ring 38 in contact with the displacer body 34 act as check valves.
  • the design of the displacement machine has a lower pulsation than the embodiment according to FIGS. 1 to 2b and, moreover, has approximately the same properties as the first embodiment.
  • the recess has the shape of an annular groove 45 with a semicircular arc profile.
  • annular groove 45 both the inlet channel 49 and the outlet channel 410 open.
  • the displacer body 44 which in turn is triangular in plan, with its Corresponding to the annular groove 45 profiled displacement surfaces 44a cooperates with three sealing bodies 47 which are relieved of hydrostatic stress.
  • the sealing bodies 47 are provided on both large surfaces with a plurality of pockets 47b which are preferably of exactly the same area and which are connected to one another via bores 47c.
  • the remaining parts of the large surfaces of the sealing bodies 47 form sealing webs 47d which seal the pockets 47b against one another in connection with the end face of the housing 41 or the inner surface of the cover 42.
  • the sealing bodies 47 are held with their sealing edges 47a against the displacement surfaces 44a of the displacement body 44 by means of a clamping ring 48 and an O-ring 481 accommodated in a groove in the sealing bodies 47.
  • the delivery pressure does not exert any forces on the clamping ring 43. Only small axial forces act on the displacer.
  • This design of the displacement machine is therefore suitable as a hydraulic pump or hydraulic motor for very high pressures in the range of 1000 bar.
  • FIGS. 5a and 5b Another development of the first embodiment of the displacement machine is shown in FIGS. 5a and 5b.
  • the again triangular displacement body 54 has here, in the plan, circular arc-shaped displacement surfaces 54a, to which the sealing bodies 57 are adapted, which, as in the case of FIGS. 4a and 4b, have hydrostatic relief bores 57c and the corresponding, sealed pockets 57b on both large surfaces.
  • the circular arc-like shape of the displacement surfaces makes it possible to enlarge the working space compared to the embodiment with straight displacement surfaces, the maximum width of which cannot be greater than the difference between the radius of the circumscribed body and the radius of the circle inscribed in the displacer.
  • the approximately lenticular sealing bodies 57 continue to lie along a sealing line 57a on the displacement surface in question.
  • the inaccuracies caused by the curved sealing line are extremely small and disappear after a short running-in period in which a profile of the displacer surface 54a is formed, in which the sealing line 57a is constantly in contact with the displacer surface over its entire length, if such profiling is not already in production was provided.
  • the sealing bodies 57 are held in contact with the displacement body 54 by an elastic clamping ring 581.
  • FIGS. 6a and 6b once again show the difference between a displacer body 67 which is triangular in the top view with straight displacer surfaces 64a or an arcuate displacer surface 64b in the top view.
  • FIGS. 7a and 7b and 8a and 8b illustrate that the straight or curved design of the displacer surfaces is also possible with a displacer body 74 or 84 which is quadrangular, pentagonal or polygonal in the view.
  • FIG. 7b additionally shows one of the then lens-shaped sealing bodies 77, the section of which along the line AA is shown in FIG. 9a.
  • This sealing body has sealed pockets 77b on both large surfaces, which are connected to one another by a bore 77c for hydrostatic relief. While on the upper large area the sealing is achieved by means of webs 77d that have remained, in the edges of the lower large surface sealing strips 77e and 77f embedded, of which the sealing strip 77e simultaneously forms the sealing edge 77a, which rests on the corresponding sealing surface ⁇ es of the displacer 74 (FIG. 7b).
  • Figure 9b shows an improvement of this sealing body. While in the case of FIG. 9a the sealing strips 77e and 77f are preferably supported by O-rings for wear compensation, in the development according to FIG. 9b the sealing strips also of the lower large area are designed as stopping webs, while the sealing body itself consists of two parts 771 and 772, between which a helical compression spring 773 is arranged. An O-ring 774 creates a tight connection between the two parts 771 and 772, but allows the length or thickness change necessary for wear compensation and generated by the spring 773. This enables a very large adjustment range to be achieved. The same axially elastic structure of the sealing body is also possible in all other embodiments.
  • Figure 9c shows a further embodiment of an axially elastic sealing body, which consists of two parts 771 and 772, which are connected to one another via a sleeve-shaped intermediate piece 775 in such a way that the upper part 771 in under the action of a helical compression spring 773 arranged between the two parts is axially displaceable in relation to the lower part 772, the sleeve-shaped intermediate piece maintaining the tight connection between the parts 771 and 772.
  • This embodiment of the sealing body is suitable for highly abrasive media. The hydrostatic pressure compensation remains fully intact.
  • the clamping ring such as 38 in FIGS. 3a and 3b, only has to have a very low elasticity, that is to say it does not need to be dimensionally stable and can consist of metal.
  • Figure 10 shows an embodiment in which the actual clamping ring 108 carries additional inner leaf or bow springs 108a, which ensure the pressure of the respective sealing body on the displacement body and thus also compensate for wear.
  • the excellent embodiment is intended for a four-surface displacement body.
  • FIGS. 11a and 11b show an embodiment of the displacement machine similar to that in FIGS. 1 to 2b, but with a variable delivery volume.
  • the recess 115 must be spherical in shape; the displacer body 114 accordingly has the profile of a spherical cap.
  • the shaft 113 is received in a pivot bearing 50, which is shown only schematically and which can be pivoted in accordance with arrow 51 in accordance with arrow 52.
  • the pivoting movement changes the angle between the shaft 113 and the axis 13 about which the sealing bodies 117 move. This changes the volume of the work area. At an angle of 0o, the delivery is zero.
  • the displacement machine is suitable e.g. as a hydraulic pump with a variable displacement during the run.
  • a clamping ring 118 holds the sealing bodies 117 with their sealing edges 117a against the displacer body 114 via an O-ring 1181.
  • the opening 119 in the recess 115 can e.g. form the inlet duct.
  • Figures 12a and 12b show an embodiment of the displacement machine, which acts as a hydraulic motor with very high torque and very low pulsation.
  • the high torque is achieved solely by the fact that the working space is designed in the form of the annular groove 125 with a relatively large diameter, without increasing the swallowing capacity and thus the performance.
  • the low pulsation is based - independently of this - on the use of a displacer 124 with ten circular-shaped displacer surfaces 124a with which ten sealing bodies 127 interact.
  • the sealing bodies 127 which are designed to be relieved of hydrostatic pressure in the manner already described, have the shape of cylinders and are held in contact with the respective displacement surfaces by a clamping ring 128.
  • the sealing edge 127a is produced by freely rotating the sealing body in its central part. With a suitable choice of material, a slight elasticity of the sealing edge 127a can be achieved; if the displacement surfaces 124a are profiled accordingly, they can also be rigid.
  • the sealing bodies 127 rotate slowly around their axis of symmetry during operation of the displacement machine. This counteracts scoring (eg as a result of a foreign body between the sealing surfaces).
  • the inlet and outlet channels are very close to each other here, corresponding to the distance between successive displacement surfaces 124a. As a hydraulic motor, this displacement machine can also be used for water hydraulics.
  • FIG. 13 A further embodiment of the displacement machine is shown in FIG. 13.
  • the displacement surfaces 134a of the displacement body 134 are also designed in the form of a circular arc, but point inwards and interact with sealing bodies 137, which are similar to the sealing bodies 127 in FIGS. 12a and 12b are formed.
  • An internal clamping ring 138 holds the sealing bodies 137 in contact with the crimping surfaces 134a.
  • the displacer body 134 is driven without contact, so it is not blinded to a drive shaft. Rather, permanent magnets 134 are embedded in its outer circumference, which form part of a magnetic coupling, the other part, not shown, of which is located outside the housing of the displacement machine, not shown here. This design is therefore suitable as a hermetically sealed pump.
  • the displacer can also be designed as a squirrel-cage rotor of an electric motor and therefore also driven without contact.
  • FIGS. 14a and 14b show an embodiment of a displacement body 145, in which it is designed as a circular disk which has six bores 144 'above the annular groove 145 forming the working space, the wall part of each bore lying above and immersing in the annular groove as displacement surface 144a works.
  • a sealing body 157 is seated in each bore, as is shown by way of example in FIG. 15 in section in a pressure-relieved embodiment.
  • This embodiment is also suitable for very high pressures, since only small axial and radial forces act on the displacement body 144.
  • the individual sealing bodies move against each other only slightly at the mostly small oblique angles of less than 10 °. They can therefore be embedded in a common, elastic ring or, in accordance with FIG. 5b, connected integrally to one another via webs 157c, provided that the sealing bodies 157 consist of a suitable elastic material.
  • This version is particularly suitable for simple, cheap pumps. If the sealing bodies are connected to one another in this way via the displacement body, the axial pressure relief holes are made so large that both the inlet and de r outlet channel can be arranged in the cover, so that aas fluid flows from the inlet through the holes and the recess to the outlet channel, so the recess itself no inlet and no outlet opening have needs.
  • Figures 16a and 16b illustrate a further embodiment of the displacement machine which is suitable for converting hydraulic or pneumatic quantities and e.g. can be used to increase pressure or as a hydraulically driven pump or compressor.
  • Arranged in the housing 161 are two mutually concentric annular grooves 165a and 165b, in which the displacement body 164 engages with four displacement surfaces 164a and 164b, respectively.
  • the displacer body has no drive shaft.
  • Displacement surfaces 164b are pressed. Both ring grooves form separate work spaces with separate inlet and outlet channels (shown somewhat offset in the figures).
  • Displacement machine work as a hydraulic motor and the inner one as a hydraulic pump, the pressure being increased in accordance with the ratio of the volumes of the working spaces.
  • Another possibility is to pressurize the inner annular groove with pressurized water so that the inner part forms the drive of the outer part, which can act as a pump or compressor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

Une machine à refoulement comprend un logement (1) fermé par un couvercle (2) et contenant un rotor avec des surfaces de refoulement crabotées avec un joint d'étanchéité et tournant avec celui-ci. Les surfaces de refoulement engagent de façon étanche un alésage (5) concentrique à l'axe de rotation (3) du rotor, qui forme l'espace de travail et est agencé dans la surface frontale (6) du logement (1) faisant face au rotor. La surface frontale (6) forme avec l'axe de rotation (3) du rotor un angle différent de 90o. Le rotor est un corps de refoulement (4) qui remplit et recouvre l'alésage (5) et comprend au moins un évidement correspondant à une section le long d'une surface plane ou courbe parallèle à l'axe et formant une intersection avec l'alésage (5). Les parties du corps de refoulement (4) qui pénètrent dans l'alésage (5) forment les surfaces de refoulement (4a). Dans chaque évidement est agencé un corps d'étanchéité (7) posé contre les surfaces de refoulement (4a) le long d'une ligne d'étanchéité. Les corps d'étanchéité (7) forment ensemble le joint d'étanchéité qui tourne avec le rotor.
EP86904164A 1986-07-11 1986-07-11 Machine a refoulement Expired - Lifetime EP0277114B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86904164T ATE59431T1 (de) 1986-07-11 1986-07-11 Verdraengermaschine.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1986/000411 WO1988000642A1 (fr) 1986-07-11 1986-07-11 Machine a refoulement

Publications (2)

Publication Number Publication Date
EP0277114A1 true EP0277114A1 (fr) 1988-08-10
EP0277114B1 EP0277114B1 (fr) 1990-12-27

Family

ID=8165126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86904164A Expired - Lifetime EP0277114B1 (fr) 1986-07-11 1986-07-11 Machine a refoulement

Country Status (5)

Country Link
US (1) US4884957A (fr)
EP (1) EP0277114B1 (fr)
JP (1) JPH01500208A (fr)
DE (1) DE3676711D1 (fr)
WO (1) WO1988000642A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3034417B2 (ja) * 1994-02-18 2000-04-17 株式会社東芝 軸流タービンの動翼制振装置
SI2137378T1 (en) * 2007-03-13 2018-02-28 Robert Bosch Gmbh Pump or engine
JP2009174520A (ja) * 2007-12-26 2009-08-06 Daikin Ind Ltd ゲートロータおよびスクリュー圧縮機
US8379376B2 (en) * 2010-08-18 2013-02-19 General Electric Company Heat management and reduction of high temperatures exposure to components inside energy meter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2913608C2 (de) * 1979-04-02 1982-10-14 Wolfhart Dipl.-Phys. 8037 Olching Willimczik Drehkolbenartige Rotationskolbenmaschine
DE2946304C2 (de) * 1979-11-16 1983-02-03 Wolfhart Dipl.-Phys. 8037 Olching Willimczik Drehkolbenartige Rotationskolbenmaschine
GB2133473B (en) * 1983-01-10 1987-07-08 George Anthony Fairbairn Rotary positive displacement
DE3308434A1 (de) * 1983-03-10 1984-09-13 Wolfhart Dipl.-Phys. 8037 Olching Willimczik Drehkolbenmaschine
DE3513073A1 (de) * 1985-04-12 1986-11-13 Wolfhart Dipl.-Phys. 8037 Olching Willimczik Starrfluegelverdraengermaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8800642A1 *

Also Published As

Publication number Publication date
JPH01500208A (ja) 1989-01-26
EP0277114B1 (fr) 1990-12-27
WO1988000642A1 (fr) 1988-01-28
DE3676711D1 (de) 1991-02-07
US4884957A (en) 1989-12-05

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