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EP4296511B1 - Volumetrische kolbenverdichterstruktur - Google Patents

Volumetrische kolbenverdichterstruktur Download PDF

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Publication number
EP4296511B1
EP4296511B1 EP23181253.8A EP23181253A EP4296511B1 EP 4296511 B1 EP4296511 B1 EP 4296511B1 EP 23181253 A EP23181253 A EP 23181253A EP 4296511 B1 EP4296511 B1 EP 4296511B1
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EP
European Patent Office
Prior art keywords
suction
compressor structure
volumetric compressor
opening
delivery
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Active
Application number
EP23181253.8A
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English (en)
French (fr)
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EP4296511A1 (de
Inventor
Giampaolo Gentilin
Giuseppe Gentilin
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Gentilin Srl
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Gentilin Srl
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Publication of EP4296511A1 publication Critical patent/EP4296511A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0442—Supporting and guiding means for the pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/02—Packing the free space between cylinders and pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/143—Sealing provided on the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • F04B53/146—Piston-rod guiding arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/164—Stoffing boxes

Definitions

  • the present invention relates to a reciprocating volumetric compressor structure, which can be used for a variety of applications, such as powering paint guns or compressed-air tools, performing blowing operations in machine shops, and still more.
  • Such reciprocating volumetric compressors generally comprise:
  • a first aspect to be refined is the fact that the connecting rod, through the first hinge means, acts on the rigid translating body according to directions transverse to the translation axis of the same rigid translating body; this causes the two piston guide and sliding rings near the first hinge means to be heavily stressed in the radial direction, resulting in wear, where such wear causes a progressive lack of tightness between the cylinder and piston and a consequent drop in the performance of the volumetric compressor itself.
  • a second aspect that can be refined relates to the compressor compactness in the direction of the axis of the movement of the pistons, as even in this technical field a reduction in overall dimensions is always sought, as well as a reduction in the number of components to the benefit of simplicity and speed of assembly thereof.
  • the task of the present invention is to develop a reciprocating volumetric compressor structure capable of obviating the aforementioned drawbacks and limitations of the prior art.
  • an object of the invention is to develop a reciprocating volumetric compressor structure capable of maintaining the same high efficiency for longer than similar compressors of the known type.
  • Another object of the invention is to develop a reciprocating volumetric compressor structure with an improved pneumatic sealing.
  • a further object of the invention is to develop a reciprocating volumetric compressor structure more compact than similar volumetric compressors of the known type.
  • a reciprocating volumetric compressor structure according to the invention is indicated as a whole by number 10 .
  • This reciprocating volumetric compressor structure 10 comprises:
  • the peculiarity of the reciprocating volumetric compressor structure 10 according to the invention lies in the fact that at least one of said pistons 11 and 12 comprises at least two guide and sliding rings 32, 32a, preferably three guide and sliding rings 32, 32a, 32b, as clearly shown in Figures 2 to 6 .
  • such a piston comprising at least two guide and sliding rings 32, 32a is the second piston 12, closer to the first hinge means 17.
  • a first piston 11, further away from the first hinge means 17, comprises a single first guide and sliding ring 31, while a second piston 12, closer to the first hinge means 17, comprises four second guide and sliding rings 32, 32a, 32b, 32c placed side by side.
  • these second guide and sliding rings may be two in number, preferably three or more than four.
  • At least one of said second guide and sliding rings 32, 32a, 32b, 32c is positioned so as to surround said first hinge means 17.
  • This last characteristic allows the radial forces transmitted from the connecting rod 16 to the piston 12 to be well distributed at least on the second rings 32, 32a, 32b, making the wear of the individual second rings 32, 32a, 32b, 32c much slower and thus leading to an important extension of the operational life of the volumetric compressor structure 10.
  • the presence of the at least two second guide and sliding rings 32, 32a, 32b, of which at least one is positioned so as to surround said first hinge means 17, determines an equally important improvement in the sealing between cylinder 15 and piston 12, resulting in improved overall efficiency of the reciprocating volumetric compressor structure 10.
  • such at least one of the second guide and sliding rings 32, 32a, 32b, 32c positioned so as to surround the first hinge means 17 is designed to be mounted so that it is at the point of maximum thrust and return angle during the swinging movement of the hinged connecting rod 16.
  • the first hinge means 17 comprise, by way of example, a pin 17a, a needle roller bearing 17b and two opposite annular seals 17c, positioned in a corresponding annular seat 16a defined at one end of the connecting rod 16, where the pin 17a is simultaneously arranged with its ends in corresponding holes 13a defined on the rigid translating body 13.
  • the second piston 12 comprises a fixing head 34, fixed to the rigid translating body 13, to which a cup-shaped cap 35 is in turn fixed.
  • This cup-shaped cap 35 comprises a circular base 35a and a cylindrical wall 36.
  • This cup-shaped cap 35 comprises a cylindrical wall 36 bearing as many annular cavities 37 as there are second guide and sliding rings 32, 32a, 32b, 32c.
  • three second guide and sliding rings 32, 32a and 32b surround, supported by the cup-shaped cap 35, the first hinge means 17.
  • the annular cavities 37 all have the same width in the direction of the axis of the cup-shaped cap 35.
  • the second guide and sliding rings 32, 32a, 32b, 32c have therefore also the same width.
  • the forces that the connecting rod 16 transmits to the second piston 12, causing the friction of the latter against the inner surface of the corresponding cylinder 15, are better distributed among the four second guide and sliding rings 32, 32a, 32b, 32c if compared to known compressors comprising one or two rings, which rings, in known configurations, are also distant from the first hinge means, i.e. they do not surround the pin between the connecting rod and the rigid translating body.
  • the second guide and sliding rings 32, 32a, 32b and 32c are annular and their axis of symmetry is parallel to a translation direction Z of the rigid translating body 13.
  • the rigid translating body 13 has a symmetrical structure, as clearly visible in Figure 2A .
  • Such a rigid translating body 13 has a circular central part with a centre C; a plane of transverse symmetry P1 and a plane of longitudinal symmetry P2 pass through this centre C.
  • the dotted line representing the plane of longitudinal symmetry P2 is the same as that representing the translation direction Z.
  • a first distance A1 between the centre C and a first end of a first piston 11 is substantially the same as a second distance A2 between the centre C and a second end of the second piston 12, as is well schematised in Figure 2B .
  • the translation direction Z is, for example, orthogonal to the rotation axis X2 of said drive shaft 19.
  • the second guide and sliding rings 32, 32a, 32b and 32c are annular and their axis of symmetry is orthogonal to the first rotation axis X1 of the first hinge means 17.
  • This peculiar reciprocating volumetric compressor structure 10 allows the radial forces transmitted from the connecting rod 16 to the piston 12 to be well distributed over at least the three first second rings 32, 32a, 32b, making the wear of the individual second rings 32, 32a, 32b, 32c much slower and thus leading to a significant extension of the service life of the volumetric compressor structure 10.
  • Each of said first 11 and second 12 pistons comprises:
  • a similar perimetral elastic gasket 42 is well shown in the section of Figure 11 ; the perimetral elastic gaskets 41 and 42 are to be understood as equal.
  • the perimetral elastic gasket 41 and 42 comprises:
  • the sealing portion 41b is configured to be in contact with the inner surface of the corresponding suction and compression chamber 26 and 27.
  • the sealing portion 41b and said cover 39 and 40 are configured in such a way that a compression gap 45 is defined between them, as visible in Figure 11 .
  • this compression gap 45 allows air to interpose itself between the sealing portion 41b and the cover 39 and 40, so as to act pushing against the sealing portion 41b in an outward radial direction; thereby, the sealing portion 41b increases its sealing efficiency against the inner surface of the suction and compression chamber 26 and 27.
  • the cover 39 and 40 comprises a pinch relief 40a configured to press the annular base portion 41a against the cover 39 or 40 in a variant embodiment not shown, or against the circular base 35a of the cup-shaped cap 35, as shown in Figure 11 .
  • the pinch relief 40a determines an improved clamping of the annular base portion 41a of the perimetral elastic gasket 41 and 42.
  • Each of said one-way valve means 24 and 25, which are well represented in Figures 7 to 10 , comprises:
  • two second suction openings 54 are defined in the base portion 22a and 23a, each defined by a through-hole.
  • Said at least one second delivery opening 55 consists of an opening having a substantially U-shaped profile with a diverter plane 55b tilted towards the inside of the head 22 and 23.
  • the one-way valve means 24 and 25 also comprise:
  • the first shutter foil 60 consists, for example, of a metal foil shaped to include a fixing portion 60a from which two side-by-side and independent shutter appendages 60b develop.
  • the second shutter foil 61 consists, for example, of a metal foil shaped to include a fixing portion 61a from which two side-by-side and independent shutter appendages 61b develop.
  • Such at least one suction passage 64 is schematised in hatching in Figure 10 and is clearly represented and visible in Figure 10B ; in the embodiment herein shown, the head 22 comprises two suction passages 64, defined by two channels made in the body of the head 22 and communicating with the filtering chamber 63 via a corresponding through opening 64a.
  • Each of the cylinders 14 and 15 comprises a tubular wall 66 wherein at least one suction channel 67 is defined extending in a direction parallel to a translation direction Z of said pistons 11, 12 in the respective compression chamber.
  • the suction channels 67 can be, for example, two for each cylinder 14 and 15.
  • the suction channels 67 are in communication with a corresponding suction passage 64 by means of a corresponding first opening 69 defined on said inner plate 51 and an adjacent second opening 70 defined on said shaped gasket 56.
  • the invention developed a reciprocating volumetric compressor structure capable of maintaining the same high yield for longer than similar compressors of the known type.
  • the invention developed a reciprocating volumetric compressor structure with improved pneumatic sealing.
  • the invention developed a reciprocating volumetric compressor structure more compact than similar volumetric compressors of the known type.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Claims (9)

  1. Volumetrische Kolbenverdichterstruktur (10) umfassend:
    - zwei gegenüberliegende Kolben (11, 12), die am selben starren Translationskörper (13) koaxial zueinander befestigt sind;
    - zwei Zylinder (14, 15), einen für jeden der besagten Kolben (11, 12);
    - eine Verbindungsstange (16), die am besagten starren Translationskörper (13) angelenkt ist, wobei erste Anlenkmittel (17) eine erste Drehachse (X1) definieren;
    - einen Elektromotor (18) mit einer Antriebswelle (19), welche eine zweite Drehachse (X2) aufweist;
    - einen Exzenterkörper (20), der an der besagten Antriebswelle (19) befestigt und an der besagten Verbindungsstange (16) mit zweiten Anlenkmitteln (21), die eine dritte Drehachse (X3) definieren, drehbar fixiert ist;
    - zwei Köpfe (22, 23), die jeweils konfiguriert und positioniert sind, um einen entsprechenden Zylinder (14, 15) zu schließen, wobei jeder Kopf (22, 23) Saug- und Förder-Einwegeventilmittel (24, 25) aufweist;
    - zwei Saug- und Verdichtungskammern (26, 27), die jeweils innerhalb eines Zylinders (14, 15) zwischen einem entsprechenden Kolben (11, 12) und einem zugewandten Kopf (22, 23) definiert sind;
    - mindestens einen Führungs- und Gleitring (31, 32) für jeden Kolben (11, 12), wobei der besagte mindestens eine Führungs- und Gleitring (31, 32) so am jeweiligen Kolben (11, 12) befestigt ist, dass er mit der Innenfläche des entsprechenden Zylinders (14, 15) in Kontakt steht;
    - ein Gehäuse (28), an dem die besagten Zylinder (14, 15) und der besagte Elektromotor (18) befestigt sind, wobei der besagte starre Translationskörper (13), die besagte Verbindungsstange (16) und der besagte Exzenterkörper (20) innerhalb des besagten Gehäuses (28) positioniert sind,
    wobei ein erster Kolben (11), der von den ersten Anlenkmitteln (17) weiter entfernt ist, mindestens einen ersten Führungs- und Gleitring (31) umfasst, und ein zweiter Kolben (12), der näher an den ersten Anlenkmitteln (17) ist, mindestens zwei zweite Führungs- und Gleitringe (32, 32a, 32b, 32c), die nebeneinander angeordnet sind, vorzugsweise drei zweite Führungs- und Gleitringe (32, 32a, 32b, 32c), die nebeneinander angeordnet sind, umfasst, dadurch gekennzeichnet, dass mindestens einer der besagten zweiten Führungs- und Gleitringe (32, 32a, 32b) so positioniert ist, dass er die besagten ersten Anlenkmittel (17) umgibt.
  2. Volumetrische Kolbenverdichterstruktur nach Patentanspruch 1, dadurch gekennzeichnet, dass der besagte zweite Kolben (12), der näher an den ersten Anlenkmitteln (17) ist, vier zweite Antriebs- und Gleitringe (32, 32a, 32b, 32c), die nebeneinander angeordnet sind, umfasst.
  3. Volumetrische Kolbenverdichterstruktur nach einem oder mehreren der vorhergehenden Patentansprüche, dadurch gekennzeichnet, dass der besagte zweite Kolben (12) Folgendes umfasst: einen Befestigungskopf (34), der am besagten starren Translationskörper (13) befestigt ist, an dem eine becherförmige Kappe (35) befestigt ist, wobei die besagte becherförmige Kappe (35) eine zylindrische Wand (36) umfasst, die so viele ringförmige Hohlräume (37) trägt, wie zweite Führungs- und Gleitringe (32, 32a, 32b, 32c) vorhanden sind.
  4. Volumetrische Kolbenverdichterstruktur nach einem oder mehreren der vorhergehenden Patentansprüche, dadurch gekennzeichnet, dass jeder der besagten ersten (11) und zweiten (12) Kolben Folgendes umfasst:
    - einen Befestigungskopf (34, 38), der am besagten starren Translationskörper (13) befestigt ist;
    - eine Abdeckung (39, 40), die am besagten Befestigungskopf (34, 38) angebracht ist;
    - eine umlaufende elastische Dichtung (41, 42) mit einem im Wesentlichen L-förmigen Querschnitt.
  5. Volumetrische Kolbenverdichterstruktur nach dem vorhergehenden Patenanspruch, dadurch gekennzeichnet, dass die besagte umlaufende elastische Dichtung (41, 42) Folgendes umfasst:
    - einen ringförmigen Basisabschnitt (41a), der konfiguriert ist, um zwischen dem besagten Befestigungskopf (34, 38) und der besagten Abdeckung (39, 40) gedrückt zu werden,
    - und einen Dichtungsabschnitt (41b), der sich vom besagten ringförmigen Basisabschnitt (41a) umlaufend erstreckt,
    wobei der besagte Dichtungsabschnitt (41b) so konfiguriert ist, dass er mit der Innenfläche der entsprechenden Saug- und Verdichtungskammer (26, 27) in Kontakt steht, wobei der besagte Dichtungsabschnitt (41b) und die besagte Abdeckung (39, 40) so konfiguriert sind, dass zwischen ihnen ein Verdichtungsspalt (45) definiert ist.
  6. Volumetrische Kolbenverdichterstruktur nach einem oder mehreren der vorhergehenden Patentansprüche, dadurch gekennzeichnet, dass jedes der besagten Einwegeventilmittel (24, 25) Folgendes umfasst:
    - eine Innenplatte (51) mit mindestens einer ersten Saugöffnung (52) und mindestens einer ersten Förderöffnung (53), wobei die besagte Innenplatte (51) der besagten entsprechenden Saug- und Verdichtungskammer (26, 27) zugewandt ist;
    - einen der besagten Köpfe (22, 23), wobei jeder der besagten Köpfe (22, 23) einen Basisabschnitt (22a, 23a), der der besagten Innenplatte (51) zugewandt ist, umfasst, wobei im besagten Basisabschnitt (22a, 23a) mindestens eine zweite Saugöffnung (54) und mindestens eine zweite Förderöffnung (55) definiert sind;
    - eine geformte Dichtung (56), wobei die besagte geformte Dichtung so positioniert ist, dass sie zwischen der besagten Innenplatte (51) und dem besagten Kopf (22, 23) eingefügt ist, wobei die besagte geformte Dichtung (56) Folgendes umfasst: ein Saugfenster (57), das so positioniert und konfiguriert ist, dass es die besagte erste Saugöffnung (52) und die besagte zweite Saugöffnung (54) in Verbindung bringt, und ein Förderfenster (58), das so positioniert und konfiguriert ist, dass es die besagte erste Förderöffnung (53) und die besagte zweite Förderöffnung (55) in Verbindung bringt;
    - eine erste Verschlussfolie (60) für den einwegigen Verschluss der besagten mindestens einen zweiten Saugöffnung (54), wobei die besagte erste Verschlussfolie (60) zwischen der besagten geformten Dichtung (56) und dem besagten Basisabschnitt (22a, 23a) des besagten Kopfes (22, 23) so befestigt ist, um im besagten Saugfenster (57) freitragend vorzustehen;
    - eine zweite Verschlussfolie (61) für den einwegigen Verschluss der besagten mindestens einen ersten Förderöffnung (53), wobei die besagte zweite Verschlussfolie (61) zwischen der besagten geformten Dichtung (56) und der besagten Innenplatte (51) so befestigt ist, um im besagten Förderfenster (58) freitragend vorzustehen.
  7. Volumetrische Kolbenverdichterstruktur nach dem vorhergehenden Patentanspruch, dadurch gekennzeichnet, dass in jedem der besagten Köpfe (22, 23) Folgendes definiert ist:
    - ein Förderdurchlass (62), der für die Verbindung zwischen einer Fördermündung, die zur Außenseite der volumetrischen Verdichterstruktur offen ist, und der besagten mindestens einen zweiten Förderöffnung (55) konfiguriert ist;
    - eine Filterkammer (63), die mit der besagten mindestens einen zweiten Saugöffnung (54) verbunden ist;
    - mindestens ein Saugdurchlass (64), der konfiguriert ist, um einen umlaufenden Abschnitt des besagten Basisabschnitts (22a, 23a) mit der besagten Filterkammer (63) zu verbinden.
  8. Volumetrische Kolbenverdichterstruktur nach einem oder mehreren der vorhergehenden Patentansprüche, dadurch gekennzeichnet, dass jeder der besagten Zylinder (14, 15) eine rohrförmige Wand (66) umfasst, wobei mindestens ein Saugkanal (67) definiert ist, der sich in einer Richtung parallel zu einer Translationsrichtung (Z) der besagten Kolben (11, 12) in der jeweiligen Verdichtungskammer entwickelt, wobei der besagte mindestens eine Saugkanal (67) mit einem der besagten Saugdurchlässe (64) mittels einer entsprechenden ersten Öffnung (69), die an der besagten Innenplatte (51) definiert ist, und einer benachbarten zweiten Öffnung (70), die an der besagten geformten Dichtung (56) definiert ist, in Verbindung steht.
  9. Volumetrische Kolbenverdichterstruktur nach einem oder mehreren der vorhergehenden Patentansprüche, dadurch gekennzeichnet, dass die besagte Translationsrichtung (Z) orthogonal zur Drehachse (X2) der besagten Antriebswelle (19) ist.
EP23181253.8A 2022-06-24 2023-06-23 Volumetrische kolbenverdichterstruktur Active EP4296511B1 (de)

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EP4296511B1 true EP4296511B1 (de) 2024-12-04

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3789691B2 (ja) * 1999-09-14 2006-06-28 三洋電機株式会社 高圧圧縮機の圧縮装置
ITVI20040051A1 (it) * 2004-03-12 2004-06-12 Gentilin Srl Compressore volumetrico alternativo
ES2700698T3 (es) * 2006-06-08 2019-02-18 Larry Alvin Schuetzle Compresor o bomba de movimiento recíproco
ITPI20070006A1 (it) * 2007-01-22 2008-07-23 Iginio Benedetti Stantuffo per compressori volumetrici alternativi, in particolare per gas idrogeno, e compressori volumetrici relativi
CN108252895A (zh) * 2018-02-07 2018-07-06 泉州市华德机电设备有限公司 一种四缸无油直联空压机

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