EP0031344B1 - Machine a pistons libres multi-tandem - Google Patents

Machine a pistons libres multi-tandem Download PDF

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Publication number
EP0031344B1
EP0031344B1 EP80901199A EP80901199A EP0031344B1 EP 0031344 B1 EP0031344 B1 EP 0031344B1 EP 80901199 A EP80901199 A EP 80901199A EP 80901199 A EP80901199 A EP 80901199A EP 0031344 B1 EP0031344 B1 EP 0031344B1
Authority
EP
European Patent Office
Prior art keywords
cylinders
machine according
cross
pistons
compressor
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
Application number
EP80901199A
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German (de)
English (en)
French (fr)
Other versions
EP0031344A1 (fr
Inventor
Henry Benaroya
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0031344A1 publication Critical patent/EP0031344A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B71/00—Free-piston engines; Engines without rotary main shaft

Definitions

  • the present invention relates to multi-tandem free piston machines, comprising several pairs of parallel engine cylinders, each cylinder containing two opposite free engine pistons, integral with compressor pistons.
  • the invention more particularly relates to a multi-tandem machine with free pistons comprising a frame, an internal movable assembly comprising a central cross member transverse to an axis of the frame, guided in translation so as to be able to move with an alternating movement the along said axis, carrying, on each side, four internal driving pistons displaceable along the driving cylinders arranged at the apexes of a rectangle and two compressor pistons sliding in internal compressor cylinders whose axes pass outside said rectangle, an external mobile assembly comprising two external crosspieces connected by at least one tie rod, each carrying four external engine pistons displaceable in four of said engine cylinders and two compressor pistons sliding in external compressor cylinders, and means for synchronizing the reciprocating movement of the two crews.
  • the invention aims to provide a multi-tandem machine whose frame has a very high rigidity, ensuring satisfactory guidance of the crews while allowing easy disassembly of the cylinders, and in particular of the cylinders which have a large axial dimension.
  • the invention provides a machine in which the frame comprises a base, an upper base connected by at least one central monobloc structure on which the internal compressor cylinders are fixed.
  • the machine comprises preferably two frames connecting the base and the base, arranged symmetrically with respect to a median plane of the frame and on which the external compressor cylinders are fixed by their face facing the median plane, the opposite faces of said cylinders external compressors which can be connected by plates.
  • each frame can be designed to constitute, with the base, the box spring and a casing which it contains and which delimits a space containing the corresponding external cross-member, a supply manifold for the corresponding external compressor cylinders.
  • the sleepers must be provided with guide means.
  • a first solution consists in providing them with bearings sliding on fixed guide tubes.
  • the machine shown in fig. 1 comprises a frame, an internal mobile assembly and an external mobile assembly, as well as fixed gas circulation pipes.
  • the frame comprises a base 10 and an upper base 11 substantially of the same length, connected by an internal monobloc structure 12 and two frames 13, symmetrically arranged with respect to the median plane III.
  • This constitution supplemented by cruciform structures 14, gives the frame very great rigidity.
  • the frame carries, by means which will be described later, four driving cylinders, two of which, 15a and 15b, appear in FIG. 1, on each side of the median plane III.
  • the axes of the four cylinders 15a, 15b, 15c and 15d are arranged at the corners of a rectangle 16 which, in the illustrated embodiment, is arranged with its large side vertically.
  • Two internal double-acting compressor cylinders 17a and 17b are mounted one on each side of the central monobloc structure 12. The axes of these cylinders 17a and 17b intersect the small median 18 of the rectangle 16.
  • To each frame 13 are fixed two compressor cylinders 18a and 18b also double acting.
  • the axes of the cylinders 18a and 18b intersect the large median 19 of the rectangle 16, outside of the latter.
  • the internal mobile assembly comprises a central cross member 20 (FIG. 3) which, due to the forces to which it is subjected, will generally be machined in a single forged part.
  • the cross member 20 is fixed to an axial guide tube 21, carried by bearings (not shown) spaced from each other by a distance at least equal to three times the diameter of the tube, and fixed to the frame.
  • the cross member has two opposite horizontal arms fixed to the rods 29 of the pistons of the internal compressor cylinders 17a and 17b. Two protrusions of the cross are attached to the rods of the pistons of the internal engine cylinders 15a, 15b, 15c and 15d.
  • the central monobloc structure makes it possible to avoid projections and dispersions. important lubricant.
  • this central structure is constituted by a cage 22, inside which is placed a casing 23 enveloping the span and of sufficient axial dimensions to allow the movement thereof.
  • the casing 23 is obviously provided with seals for the passage of the rods 29 connecting the cross-member to the pistons.
  • This casing or the cage can carry the bearings of the guide tube 21.
  • the external mobile assembly has a symmetrical constitution with respect to the median plane III. It comprises two external crosspieces 24 (FIG. 4), the span of which can be made much smaller than that of the central crosspiece 20, which offers several advantages. On the one hand, there is a tendency to balance the masses of internal and external crews inherently. On the other hand, the stresses undergone by the external crosspieces are significantly reduced, particularly during the driving phase, when forces of opposite signs are transmitted by the rods of the external driving pistons 25a, 25b, 25c and 25d and the tie rods 26a and 26b of connection between the crosspieces 24, placed in line with the rods of the pistons of the compressor cylinders 18a and 18b. This arrangement of the tie rods allows them to pass outside the central cross member 20. It is consequently possible to give them a one-piece construction and to allow relatively easy disassembly of the cross member 20.
  • the cross members 24, like the cross member 20, are enclosed in a casing 27 provided with sliding seals providing passage to the piston rods and the tie rods. They are provided with guide tubes 28 sliding in bearings not shown. These bearings can be carried by the casing 27 or by a cage 30 which surrounds it and reinforces the frame carrying the compressors.
  • This device comprises two toothed wheels 31 (fig. 4 and 5) placed in the median horizontal plane of the machine. Each wheel 31 meshes with two racks 32 and 33.
  • the racks 32 are fixed to the central cross member 20 while the racks 33 are fixed to one of the external cross members 24.
  • the two wheels 31 are placed on the same side of the median vertical plane of the machine so as not to constitute with the tie rods 26 a hyperstatic system and they are mounted on bearings having an elasticity making it possible to absorb shocks.
  • the fixing of the different cylinders is carried out by means which limit the overhangs.
  • the external compressor cylinders 18a and 18b are fixed by their internal face, adjacent to the cross-member. This face is fixed by bolts which can also serve to retain the valve-holder plates, on the corresponding frame 13.
  • This frame, the depth of which is close to the thickness of the cross-member 24, is itself fixed between base 10 and box spring 11. It is reduced in the middle by a cruciform structure which will be described later.
  • the rigidity of the assembly can be increased by connecting the bottoms of the cylinders 18a and 18b by a plate 34 (fig. 1).
  • the fixing of the internal compressor cylinders 17a and 17b poses a problem which is not found in the case of the external compressor cylinders 18a and 18b. Indeed, it is necessary that the access to the injectors of the engines is possible and that one can disassemble the engine cylinders without important preliminary works and preferably in block.
  • the compressor cylinders 17a and 17b are fixed by flanges on lateral parts of the cage 22, provided for this purpose in very thick sheet metal (40 mm for example).
  • the compressor cylinders can have a true symmetry of revolution with regard to the cooling water circuits and the envelope of compressed air which they discharge, which is very favorable for the reduction of thermal stresses. .
  • the driving cylinders 15a to 15d are each placed in one of the dihedrons of the cruciform structure 14. They can be introduced by simple translation and rotation in the horizontal plane. They are thus introduced into their sweeping pants, previously fixed to the one-piece structure.
  • a cradle facilitating fixing is provided around the water envelope of the central ring of each engine cylinder.
  • casings 23 and 27 make it possible to collect the lubricating oil from the bearings, therefore to reduce losses and contamination by the oil.
  • the oil is collected in the bottom of the casings 23 and 27 and it is evacuated by automatic bleeders before being mixed again with the excess oil from the engine cylinders.
  • Such oil outlets 35 and 36 appear in FIGS. 3 and 4.
  • the collectors 43 are provided with refrigerants 45 (FIG. 1) and flow into sweep collectors 46 which in turn supply all the engine cylinders 15a-d.
  • the MP compressor cylinders placed to the right of the median plane, supply a medium pressure manifold (not shown in the figure). A fraction of the air admitted to this manifold MP is sent to an air turbine driving the turbo-blower. The rest of the air is mixed with the exhaust gases coming from the engine cylinders 15a-d and feeds a gas turbine coupled to the load, constituted for example by an alternator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)
EP80901199A 1979-06-25 1981-01-12 Machine a pistons libres multi-tandem Expired EP0031344B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7916295 1979-06-25
FR7916295A FR2459875A1 (fr) 1979-06-25 1979-06-25 Perfectionnements aux machines a pistons libres multi-tandem

Publications (2)

Publication Number Publication Date
EP0031344A1 EP0031344A1 (fr) 1981-07-08
EP0031344B1 true EP0031344B1 (fr) 1982-12-22

Family

ID=9227056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80901199A Expired EP0031344B1 (fr) 1979-06-25 1981-01-12 Machine a pistons libres multi-tandem

Country Status (12)

Country Link
US (1) US4678407A (ja)
EP (1) EP0031344B1 (ja)
JP (1) JPS56500724A (ja)
BE (1) BE884002A (ja)
CA (1) CA1132458A (ja)
DE (1) DE3061420D1 (ja)
DK (1) DK80181A (ja)
FR (1) FR2459875A1 (ja)
IT (1) IT1131350B (ja)
NO (1) NO153541C (ja)
SU (1) SU948297A3 (ja)
WO (1) WO1981000019A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564350A (en) * 1982-06-10 1986-01-14 Thomas R. Vigil Plastic extruder assembly
CA2607069A1 (en) * 2005-04-29 2006-11-09 Tendix Development, Llc Radial impulse engine, pump, and compressor systems, and associated methods of operation
US20100242891A1 (en) * 2008-10-30 2010-09-30 Timber Dick Radial impulse engine, pump, and compressor systems, and associated methods of operation
CN101555829B (zh) * 2008-11-21 2013-02-20 靳北彪 自由活塞式负荷响应发动机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347215A (en) * 1967-10-17 Free piston engines
GB771966A (en) * 1954-07-30 1957-04-10 Hans Petersen Combined free piston internal combustion engine and air compressor assembly
US2812894A (en) * 1955-08-05 1957-11-12 Paul H Schweitzer Tandem engine compressor
US2945618A (en) * 1956-12-15 1960-07-19 Messerschmitt Ag Free-piston compressors
FR1272108A (fr) * 1960-08-09 1961-09-22 Engins Pistons Libres Epl Perfectionnements aux machines à pistons libres, notamment aux auto-compresseurs ou aux générateurs de gaz
FR1601540A (ja) * 1968-12-27 1970-08-24
FR2423637A1 (fr) * 1978-04-21 1979-11-16 Braun Anton Moteur a pistons libres et cylindres opposes
FR2432089A1 (fr) * 1978-07-26 1980-02-22 Benaroya Henry Installation de production d'energie a generateur a pistons libres

Also Published As

Publication number Publication date
DE3061420D1 (en) 1983-01-27
NO153541B (no) 1985-12-30
JPS56500724A (ja) 1981-05-28
NO810579L (no) 1981-02-19
IT1131350B (it) 1986-06-18
CA1132458A (fr) 1982-09-28
FR2459875A1 (fr) 1981-01-16
EP0031344A1 (fr) 1981-07-08
WO1981000019A1 (fr) 1981-01-08
BE884002A (fr) 1980-12-29
NO153541C (no) 1986-04-09
SU948297A3 (ru) 1982-07-30
US4678407A (en) 1987-07-07
DK80181A (da) 1981-02-23
IT8022859A0 (it) 1980-06-18

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