EP0725899B1 - Kolbenverdichter für gasförmige medien - Google Patents
Kolbenverdichter für gasförmige medien Download PDFInfo
- Publication number
- EP0725899B1 EP0725899B1 EP95929102A EP95929102A EP0725899B1 EP 0725899 B1 EP0725899 B1 EP 0725899B1 EP 95929102 A EP95929102 A EP 95929102A EP 95929102 A EP95929102 A EP 95929102A EP 0725899 B1 EP0725899 B1 EP 0725899B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- air
- flywheel
- crankcase
- medium
- 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
Links
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 230000001133 acceleration Effects 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 description 9
- 229920006362 Teflon® Polymers 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/128—Crankcases
Definitions
- the present invention relates to an electrically driven, dry-running piston compressor or piston compressor for gaseous media, preferably for air.
- the object of the present invention is therefore a compressor to provide, which has a high temperature resistance, suitable for continuous operation even under unfavorable circumstances is and has a simple and inexpensive construction. Furthermore, compared to known, simply constructed compressors better efficiency can be achieved so that at lower electrical power consumption a high pressure available becomes.
- the compressor can advantageously be of the type described in DE 36 16 968 Al known design, in which a connecting rod joint is dispensed with and where the piston with the piston rod Piece forms. At the other end is the piston rod on the drive crank articulated.
- the wobbling piston can be similar DE 32 40 475 A1 be provided with sealing lips and has an inner flap valve similar to DE 36 16 168 A1 on.
- This type of compressor is used as a small compressor in the tool kit from automobiles to breakdowns to be available over very short operating times. A continuous operation is not possible with these features alone. Only in the combination with the features described here can permanent use of these known Individual features can be used.
- the flywheel is arranged so cheaply in the crankcase that space can be saved, resulting in a small one Unit leads.
- the flywheel also helps of their surface transverse to the axis as a rotary slide valve and thus ensures stroke-dependent metering of the medium.
- partial surfaces running parallel to the axis are used Flywheel as a medium accelerator.
- the flywheel connected to the piston so that its idle stroke at least partially used to convey cooling air through ducts is bypassed in the cylinder housing and the electric motor and it cools.
- the control of the necessary air supply and Air discharge openings are made by an appropriately trained Flywheel on which the piston rod of the delivery piston is attached eccentrically. By rotating this Flywheel the corresponding air openings are opened and closed.
- the shape of the flywheel and the arrangement the openings must correspond to each other.
- a The opening is used to draw in outside air, the other opening for removing the cooling air. It is a kind of slide valve.
- front surface sections can accelerate the medium in the desired direction.
- the flywheel acts like a second pump in the compressor and moves only those metered for cooling by the same component Proportion of intake. This improves efficiency considerably.
- the piston head also contains, as described above Valve, namely a check valve through which the to be compressed Air from the crankcase during the idle stroke the workspace flows.
- the piston moves upwards during the working stroke. That with him connected valve is closed. It compresses the air in the Cylinder passed through another check valve to the consumer is delivered. Outside air is supplied by the Flywheel opened opening.
- the piston moves down again during the idle stroke. As long as its valve is closed, it compresses itself below air it contains, which is then passed through the is now opened from the flywheel and for cooling the cylinder head and the electric drive the compressor serves, being from the movement of the Flywheel is additionally accelerated. That from the Flywheel works like a valve acting as a rotary valve piston so to speak in synchronism with the air intake and Outlet opening compared to the valve in the piston head. In the working stroke is the valve in the piston head and the inlet valve in essential, i.e. with a certain lead, closed. Vice versa opens after the print run through top dead center the inlet, while initially the valve during the down stroke in the piston head is still closed, only to be on the further Open piston stroke.
- the amount of cooling air thus obtained depends on the pressure the consumer opposes the compressor. With high back pressure the consumer hardly takes any air, which means the compressor takes a lot of power to work against that pressure what leads to increased heating of the compressor. The height Back pressure also ensures that the piston valve is long remains closed and thus a lot of cooling air is conveyed.
- a compressor 10 according to FIG. 1 consists of a cylindrical motor housing 12, the one in motor vehicles includes the usual DC-powered electric motor, the the electrical energy is supplied via a cable 24. On the motor housing 12 closes a crankcase at right angles 14 on. The whole unit of the compressor 10 is over a mounting plate 22 mountable.
- a cylinder 16 connects to the crankcase 14 is provided on the outside with cooling fins 18 and a casing 20.
- the crankcase has an air inlet opening 26 on the side provided, through which the air to be conveyed 70 is sucked.
- the used air to be conveyed is discharged through a discharge opening 28 dispensed at the upper end of the cylinder head 16.
- Another Outlet opening 30 for a portion of cooling air is on upper free end of the motor housing 12.
- Fig. 2 shows a side section of the compressor 10. Es Here are cooling air ducts for the introduction of cooling air is symbolized by an arrow 80, into the motor housing 12 recognizable. This air flows through the motor housing in axial direction up to arrow 82 and then passes through the Opening 30 out.
- air channels 46 begin behind an opening 54.
- the cylinder and piston arrangement is clearer from Fig. 3.
- a flywheel sits on an axis 32 of the electric motor 34. This is eccentric using a ball bearing 50 a piston rod 36 is arranged.
- the flywheel 34 serves at the same time as a rotary slide piston for dosing and control and additional acceleration of the incoming and outgoing air.
- With a certain caster are alternately in the crankcase 14 opened the air inlet 52 and air outlet 54 and closed.
- the one for control The flywheel 34 used has an approximately semicircular shape Flywheel segment 33 with an opposite approach 35 for the ball bearing 50.
- the openings 52, 54 opened and closed almost simultaneously, but briefly both openings 52, 54 opened, but never both openings 52, 54 are closed at the same time, resulting in an undesirable Pressure build-up would lead below the piston.
- the openings 52 and 54 are opened and closed somewhat trailing to the upper and lower turning points of a piston 58.
- the approach 35 of the flywheel 34 on which the piston rod 36 is attached therefore has an angle of approx. 15 ° to the vertical with respect to the semicircular flywheel segment 33 on. This has lagged the controller proves to be advantageous due to the inertia of the air proven.
- the flywheel 34 has the one shown in the drawing semicircular shape and also serves as a mass balance for the piston 58 driven by it with piston rod 36 and as a rotary slide control for dosing and controlling the and escaping air.
- a cylinder space 38 is located above the piston 58 is closed at the top by a check valve, which consists of a valve support surface provided with openings 59 61, to which a valve spring 66 is used Valve plate 62 is pressed.
- Fig. 3 is a position of the piston shown in the left end position. In the opposite Position is the piston at its lower turning point. From there, the piston 58 moves upward. Doing so the air in the cylinder space 38 above the piston 58 compressed. The air pressure presses the valve plate 62 against the Pressure of valve spring 66 upwards, which is valve 61, 59, 62 opened with it. The air pushed up by piston 58 flows through the openings 59 of the valve plate 62 into one Cylinder head cavity 68 and from there via the air outlet opening 28 to the consumer. During this movement of the piston 58 from bottom to top it is the working stroke of the compressor.
- An upper insert 86 has a rim on its bottom Openings 92 through which in the open state when moving downwards of the piston 58 air can pass through.
- a piston ring 90 made of Teflon encloses the insert 92 with play. Of the Piston ring 90 is on the working stroke of piston 58 his lower stop. The valve is then closed. It no air can pass through the piston head. This is the case when the piston moves up. Is located the piston ring 90 at its upper stop, so the valve open. Air can pass through the piston head. At the downward movement of the piston 58 opens the valve in Piston head as soon as the pressure below the piston head increases is called the pressure above the piston head. The time of Opening the piston head valve depends on the pressure that the consumer the compressor.
- the outer surface of the piston only has one at the upper edge very short cylindrical section with the diameter of the Cylinder and then tapers downward at an angle of approx. 5 ° to the outer surface of the cylinder.
- This obliquely tapered shape of the outer edge of the Teflon ring 90 a clean seal even when the piston 58 is tilted guaranteed.
- the piston should run in a cylinder made of anodized aluminum or a similar metal alloy without lubricant.
- Teflon is preferably chosen as the material for the running surfaces of the piston.
- the piston jacket made of Teflon has an annular groove on its top near the side wall.
- a metal ring 94 for example made of steel or aluminum, is attached, which is secured at the top by a pressed-in coil spring 96.
- the Teflon ring 90 also has a radially inward offset, a further, open, downwardly open, annular undercut 98.
- This undercut allows the inner part of the Teflon head to expand or contract as desired via the temperature, without the diameter of the metal ring 94 being influenced from the inside by pressure or tension.
- the outer diameter of the Teflon piston head changes with the coefficient of expansion of the metal of which the cylinder is made when the metal ring 94 is made of the same metal. This ensures a constant temperature fit between the Teflon (R) piston head and the metal cylinder and thus a corresponding tightness.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Description
Claims (7)
- Elektrisch angetriebener, trockenlaufender Kolbenkompressor (10) für gasförmige Medien, insbesondere Luft, wobei diese Medium zur Innenkühlung über ein Kurbelgehäuse (14) angesaugt wird,
dadurch gekennzeichnet,
daß im Kurbelgehäuse (14) eine Kolbenstange (36) nur einseitig beweglich auf einer Schwungscheibe (34) gelagert ist, die zugleich als Drehschieberorgan zur Dosierung, Steuerung und Beschleunigung des angesaugten Mediums ausgebildet ist. - Kolbenkompressor nach Anspruch 1,
dadurch gekennzeichnet,
daß die Kolbenstange (36) fest mit einem Kolben (58) verbunden ist, der mit einem inneren Ventil versehen ist, welches während des Arbeitshubes im wesentlichen geschlossen und während des Leerhubes im wesentlichen offen ist. - Kolbenkompressor nach Anspruch 1,
dadurch gekennzeichnet,
daß die Schwungscheibe (34) beim Arbeitshub eine Öffnung (52) freigibt, durch die das Medium von außen angesaugt wird und beim Leerhub des Kolbens (38) diese Öffnung (52) wieder verschließt und dafür eine zweite Öffnung (54) freigibt, durch die das beim Leerhub verdichtete Medium über Kanäle (46, 48) im Kurbelgehäuse (14) und am Zylinderkopf (16, 18) sowie am elektrischen Antrieb (12) vorbei nach außen (30, 82) geleitet und beschleunigt wird. - Kolbenkompressor nach Anspruch 1,
dadurch gekennzeichnet,
daß die Schwungscheibe (34) so ausgebildet ist, daß das wechselseitige Öffnen und Schließen der Öffnungen (52, 54) zeitlich nach hinten versetzt zu den oberen und unteren Umkehrpunkten des Kolbens (58) erfolgt. - Kolbenkompressor nach Anspruch 3 oder den Ansprüchen 3 und 4,
dadurch gekennzeichnet,
daß die beiden Öffnungen für den Luftein- und Luftaustritt (52, 54) einander direkt gegenüber liegen. - Kolbenkompressor nach den Ansprüchen 3 bis 5,
dadurch gekennzeichnet,
daß die Schwungscheibe (34) aus einem halbkreisförmigen Segment (33) besteht, das einen über den Drehpunkt (32) hinausragenden Ansatz (35) aufweist, an dem exzentrisch die Kolbenstange (36) angelenkt ist und in Drehrichtung Flächenabschnitte zur zusätzlichen Luftbeschleunigung aufweist. - Kolbenkompressor nach Anspruch 6,
dadurch gekennzeichnet,
daß der Ansatz (35) der Schwungscheibe (34) einen Winkel von ca. 15° zur Senkrechten auf das halbkreisförmige Schwungscheibensegment (33) einnimmt.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4429098 | 1994-08-17 | ||
| DE4429098A DE4429098A1 (de) | 1994-08-17 | 1994-08-17 | Kolbenverdichter für gasförmige Medien |
| PCT/EP1995/003194 WO1996005431A1 (de) | 1994-08-17 | 1995-08-11 | Kolbenverdichter für gasförmige medien |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0725899A1 EP0725899A1 (de) | 1996-08-14 |
| EP0725899B1 true EP0725899B1 (de) | 1998-02-25 |
Family
ID=6525864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95929102A Expired - Lifetime EP0725899B1 (de) | 1994-08-17 | 1995-08-11 | Kolbenverdichter für gasförmige medien |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0725899B1 (de) |
| AT (1) | ATE163462T1 (de) |
| DE (2) | DE4429098A1 (de) |
| ES (1) | ES2112653T3 (de) |
| WO (1) | WO1996005431A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19726943C2 (de) * | 1997-06-25 | 2000-03-23 | Bitzer Kuehlmaschinenbau Gmbh | Kältemittelkompressor |
| DE10047087A1 (de) * | 2000-09-22 | 2002-04-11 | Boge Kompressoren | Kolbenkompressor |
| DE10057383B4 (de) * | 2000-11-18 | 2005-10-06 | Continental Aktiengesellschaft | Mehrstufiger Kolbenverdichter und Verfahren zur Kühlung eines elektrischen Motors für einen mehrstufigen Kolbenverdichter |
| DE10058923A1 (de) * | 2000-11-28 | 2002-06-13 | Knorr Bremse Systeme | Anordnung eines trockenlaufenden Kompressors an einem Fahrzeug |
| JP5381891B2 (ja) * | 2010-05-11 | 2014-01-08 | マックス株式会社 | ロッキングピストンのシール構造 |
| CN111188750A (zh) | 2020-02-21 | 2020-05-22 | 广州市安途电器有限公司 | 一种汽车充气泵 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE487669C (de) * | 1926-12-25 | 1929-12-11 | Westinghouse Brake & Signal | Kolbenkompressor |
| DE949250C (de) * | 1949-05-28 | 1956-11-08 | Tecalemit Ges M B H Deutsche | Luftgekuehlter Kompressor |
| FR1463769A (fr) * | 1963-05-29 | 1966-07-22 | Compresseur à piston et ses procédé et dispositif de refroidissement et ses dispositifs de montage | |
| DE2915848A1 (de) * | 1979-04-19 | 1980-11-06 | Helmut Thurner | Verdichter- und sauggeraet und kolben fuer dieses geraet |
| JPS58131469A (ja) * | 1982-01-29 | 1983-08-05 | Honda Motor Co Ltd | シ−ル装置 |
| DE3616968A1 (de) * | 1986-05-20 | 1987-11-26 | Bosch Gmbh Robert | Taumelkolben-kompressor |
| FR2637653B1 (fr) * | 1988-10-11 | 1994-04-08 | Barlier Claude | Ensemble de compression dite inverse |
| DE4110912A1 (de) * | 1990-04-18 | 1991-10-24 | Bauer Kompressoren | Trockenlaufender hubkolben-kompressor |
-
1994
- 1994-08-17 DE DE4429098A patent/DE4429098A1/de not_active Withdrawn
-
1995
- 1995-08-11 WO PCT/EP1995/003194 patent/WO1996005431A1/de not_active Ceased
- 1995-08-11 AT AT95929102T patent/ATE163462T1/de not_active IP Right Cessation
- 1995-08-11 DE DE59501497T patent/DE59501497D1/de not_active Expired - Fee Related
- 1995-08-11 EP EP95929102A patent/EP0725899B1/de not_active Expired - Lifetime
- 1995-08-11 ES ES95929102T patent/ES2112653T3/es not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE4429098A1 (de) | 1996-02-22 |
| DE59501497D1 (de) | 1998-04-02 |
| EP0725899A1 (de) | 1996-08-14 |
| ATE163462T1 (de) | 1998-03-15 |
| WO1996005431A1 (de) | 1996-02-22 |
| ES2112653T3 (es) | 1998-04-01 |
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