EP0336892B1 - Tauchkolbenkompressor - Google Patents

Tauchkolbenkompressor Download PDF

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Publication number
EP0336892B1
EP0336892B1 EP89810219A EP89810219A EP0336892B1 EP 0336892 B1 EP0336892 B1 EP 0336892B1 EP 89810219 A EP89810219 A EP 89810219A EP 89810219 A EP89810219 A EP 89810219A EP 0336892 B1 EP0336892 B1 EP 0336892B1
Authority
EP
European Patent Office
Prior art keywords
guide part
cylinder
piston
wall
compressor according
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
EP89810219A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0336892A1 (de
Inventor
Eduard Müller
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.)
Burckhardt Compression AG
Original Assignee
Maschinenfabrik Sulzer Burckhardt AG
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 Maschinenfabrik Sulzer Burckhardt AG filed Critical Maschinenfabrik Sulzer Burckhardt AG
Priority to AT89810219T priority Critical patent/ATE72021T1/de
Publication of EP0336892A1 publication Critical patent/EP0336892A1/de
Application granted granted Critical
Publication of EP0336892B1 publication Critical patent/EP0336892B1/de
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
    • 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
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid

Definitions

  • the invention relates to a plunger compressor with at least one piston which can be moved back and forth in a cylinder via a crankshaft and a connecting rod, which piston has a guide part which faces the crank chamber and is guided in a lubricated cylinder section and a working part which is offset therefrom and which interacts with a dry cylinder section and which functions as Dry-running gas sealing part, in particular as a labyrinth piston, is formed and delimits a compression space in the cylinder, oil-wiping means being provided in the movement area of the guide part and in the cylinder, outside the movement area of the working part, a leak discharge opening connected to a low-pressure space for discharging leakage gas emerging from the compression space and is provided from leakage oil emerging from the crankcase.
  • the invention has for its object to provide a submersible piston compressor which is improved in particular in this regard and in which oil particles thrown off from the guide part and from the lubricated cylinder section are reliably detected and reliably kept away from the section of the cylinder surface assigned to the working part.
  • the cover element provided according to the invention enables a compact design of the plunger compressor with a minimal distance between the relevant movement ranges limited by the top dead center position of the guide part and the bottom dead center position of the working part.
  • oil particles are detected and kept away from the dry cylinder section, which due to the maximum deceleration or acceleration occurring during the respective reversal of the piston movement are thrown off in the top dead center position of the piston from the guide part into the cylinder section containing the leakage discharge opening.
  • the plunger compressor according to FIG. 1 has a crankshaft 2, which is mounted in a crankcase 1 and has a crank pin 3, to which a connecting rod 4 is articulated.
  • the other end of the connecting rod 4 is articulated via a piston pin 5 to a piston 6, which is sealingly guided in a cylinder 7 connected to the crankcase 1 and arranged with a horizontal longitudinal axis L.
  • a cylinder 7 connected to the crankcase 1 and arranged with a horizontal longitudinal axis L.
  • two corresponding cylinders for example arranged opposite one another, or a plurality, for example three or four, cylinders 7 arranged in a star shape can also be provided, each containing a corresponding piston 6 which can be driven via the common crankshaft and a connecting rod.
  • the cylinder 7, which is open against the crankcase 1, is closed at its end facing away from the crankcase 1 by an end wall 8 of a cylinder head 10, which contains a suction chamber 11 and a pressure chamber 12.
  • the suction chamber 11 is connected through an inlet opening 13 to a suction line (not shown) for the gas to be compressed, while the pressure chamber 12 is connected through an outlet opening 14 to a pressure line (not shown) for the compressed gas.
  • the piston 6 has a guide part 6a facing the crankcase 1 and a working part 6b connected to the crankcase 1 via a stepped central piston section 6c and facing the cylinder head 10 and which delimits a compression space 15 with the end wall 8.
  • the compression chamber 15 can be connected to the suction chamber 11 via a suction valve 17 arranged in the end wall 8 and a corresponding pressure valve 18 to the pressure chamber 12.
  • the piston 6 can be moved back and forth via the crankshaft 2, which can be driven according to arrow 16, between the "upper" dead center position shown in full lines and the "lower” dead center position 6 'indicated by dash-dotted lines in FIG. 1, the guide part 6a in the corresponding cylinder section 7a guided and lubricated by spray oil supplied from the crankcase 1.
  • the guide part 6a is provided with scraper rings 20, through which most of the oil supplied is returned to the crankcase 1.
  • the oil that accumulates between the scraper rings 20 can be drained into the interior of the guide part 6a through passage openings (not shown) provided in the guide part 6a.
  • the working part 6b is designed as a dry-running gas sealing part in that it is provided on its outer circumference with labyrinth sealing grooves, which form a non-contact seal with the cylinder section 7b surrounding it.
  • a leak discharge space 21 is formed which enlarges the cylinder space and communicates via a leak discharge opening 22 with a space, not shown, in which a lower pressure prevails than in the leak discharge space 21.
  • the leak discharge opening 22 can be connected to the leak discharge opening 22.
  • a discharge line, not shown, may be connected, which is intended for discharging leakage gas emerging from the compression space 15 via the labyrinth seal and leakage oil not detected by the scraper rings 20.
  • the leakage discharge space 21 can also be connected to the crankcase 1 via a pressure compensation line 24 connected to a passage 23 of the cylinder 7, thereby preventing a pressure drop across the scraper rings 20. Accordingly, even at high piston speeds, the wear on the guide part 6a and / or in the cylinder section 7a can be kept low.
  • the piston 6 is provided in a section A adjoining the guide part 6a, which reaches the area of the leakage discharge space 21 when the piston 6 is at the top dead center, with annular groove-like depressions 25, 25a arranged one behind the other in the axial direction of the piston 6 and laterally by rib-like Elevations 26, 26a are limited.
  • the elevations 26, 26a are each provided with a sharp edge 27 running over their circumference.
  • the depressions 25, 25a can be provided with inserts 28 which are intended for the temporary storage of oil particles and which are omitted in FIG. 1 for the purpose of simplifying the illustration.
  • the inserts 28 each consist of a material suitable for collecting the oil particles, for example steel wool, which enables the oil particles to be combined to form separable oil drops and which at the same time is sufficient is permeable in order to allow oil which flows into the recesses 25, 25a from above or from the side to flow downward by gravitation.
  • annular cover element 31 surrounding the piston 6 is fastened in the cylinder 7.
  • the cover element 31 is designed as a catch shell which is open towards the guide part 6a and which has a central opening 29 surrounding the piston section 6c, an inner wall 36 delimiting the latter and a baffle wall 32 arranged transversely to the stroke direction of the piston 6, and a baffle wall running from the latter against the guide part 6a ,
  • the inner wall 36 has an outwardly projecting part facing the guide part 6a Edge section 43 which, together with the baffle wall 32, forms a channel-like shield surrounding the piston section 6c, which in particular collects the leakage oil drops thrown off by the elevations 26, 26a in the upper half of the cylinder 7 and leads them downward. This prevents these leakage oil drops from falling onto the piston section 6c, from which they could wet the cylinder section 7b and / or the working part 6b over time.
  • the inner wall 36 can be designed in the manner of a crimping of the inner edge of the baffle wall 32. An embodiment is also possible in which the inner wall 36 extends only over a part, for example the upper half, of the opening 29.
  • the cover element 31 which can be formed in one or more parts, shields the cylinder section 7b to be kept dry from the leakage oil escaping between the guide part 6a and the lubricated cylinder section 7a or possibly thrown off by the elevations 26, 26a. Accordingly, even in the event of a defect on the oil scraper rings 20, carryover of oil particles into the cylinder section 7b is reliably avoided.
  • the working part 6b is made with a larger diameter than the guide part 6a.
  • the working part 6b is formed by a cup-shaped head piece open towards the guide part 6a, which has an end wall 37 and a side wall 38 and which is connected to the piston section 6c by screws 40.
  • an annular space 42 which is open towards the working part 6b and has a depth T, is formed, which extends inwards through a sleeve-shaped cylinder extension 41 projecting towards the working part 6b, and outwards is limited by the end portion of the cylinder section 7b facing the guide part 7a.
  • the annular space 42 is provided with the leakage discharge opening 22 and is designed such that it can accommodate an end section of the wall section 38 of the working part 6b in the bottom dead center position 6 'of the piston 6, the movement ranges of the guide part 6a and the working part 6b being in a corresponding length section C of cylinder 7 overlap.
  • the piston 6 and the cylinder 7 according to FIG. 3 can therefore, compared to the embodiment according to FIG. 1, each be designed with a correspondingly shorter overall length.
  • the outer wall 33 of the cover element 31 is designed with an essentially cylindrical wall part, the outer diameter of which is smaller than the inner diameter of the wall part 38 of the working part 6b.
  • the outer wall 33 extends as an inner shield of the cylinder section 7b into the annular space 42 and against the leak discharge opening 22.
  • the outer wall 33 in the area of the leak discharge opening 22 can be provided with an edge portion 35 projecting over its circumference, the outer diameter of which is larger than the diameter of the cylinder section 7b, so that wetting of this cylinder section 7b is reliably prevented.
  • the cover element 31 can, as indicated in FIG. 3, be fastened to corresponding end faces of the cylinder 7 by screws 39 and / or a corresponding holder 44 which is permeable to the leak oil, distributed over the edge part 35 in the circumferential direction.
  • the holder 44 can also be formed by screws or corresponding spacers offset in the circumferential direction, or, as shown, by a cylindrical sieve part 45 surrounding the piston 6.
  • the working part 6b is designed with a smaller diameter than the guide part 6a.
  • the end section of the guide part 6a facing the working part 6b can, as shown, be designed with an annular recess 50 which is open towards the working part 6b and which extends outwards through an annular piston section 51 of the guide part 6a and inwards through the piston section connecting the guide part 6a to the working part 6b 6c is limited.
  • the cylinder area surrounding the dry cylinder section 7b is designed with an annular space 52 which is open towards the guide part 6a and adjoins the leakage discharge space 21 and is delimited by an outer wall part 53 and a sleeve-like inner cylinder part 54, on which a part of the part with the working part 6b cooperating cylindrical surface is formed.
  • the recess 50 and the annular space 52 are each designed with such a depth T 1 or T 2 that they can each receive an end portion of the cylinder section 54 or the piston section 51 in the top dead center position of the piston 6 shown in FIG. 4, the Overlap ranges of movement of the guide part 6a and the working part 6b in a corresponding length section E.
  • the piston 6 and the cylinder 7 can thus be made with a shorter overall length than in the embodiment according to FIG.
  • a cover element 31a is arranged in the annular space 52, which is designed with a substantially cylindrical inner wall 36a, which surrounds the end section of the cylinder section 54 as an outer shield and which is in the top dead center position of the piston 6 as an inner shield the piston section 51 extends into the recess 50 of the guide part 6a. Accordingly, the dry cylinder section 7b against that of the piston section 51 in the top dead center position Guided part 6a is shielded from leaking oil, which is collected in particular in the upper part of the cylinder 7, which is not visible in FIG. 4, through the inner wall 36a and the baffle wall 32, drained downward and discharged via the outer wall 33a against the leakage discharge opening 22.
  • the outer wall 33a can also be cylindrical or, as shown in FIG.
  • the cover element 31a can be placed with the inner wall 36a directly or, for example, via a support ring (not shown) on the cylinder part 54 or, as shown, can be fastened thereon by means of rib-like spacers 55, a leakage gas emerging from the cylinder section 7b being released between the cylinder part 54 and the inner wall 36a flowable annular gap is formed.
  • the cover element 31a can also, similarly to the embodiment according to FIG. 3, be fastened in the annular space 52 by means of corresponding screws 39 or holding parts, which are not shown on the end face.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP89810219A 1988-04-08 1989-03-21 Tauchkolbenkompressor Expired - Lifetime EP0336892B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810219T ATE72021T1 (de) 1988-04-08 1989-03-21 Tauchkolbenkompressor.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1312/88 1988-04-08
CH1312/88A CH674664A5 (enrdf_load_stackoverflow) 1988-04-08 1988-04-08

Publications (2)

Publication Number Publication Date
EP0336892A1 EP0336892A1 (de) 1989-10-11
EP0336892B1 true EP0336892B1 (de) 1992-01-22

Family

ID=4207500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810219A Expired - Lifetime EP0336892B1 (de) 1988-04-08 1989-03-21 Tauchkolbenkompressor

Country Status (7)

Country Link
EP (1) EP0336892B1 (enrdf_load_stackoverflow)
JP (1) JPH01285679A (enrdf_load_stackoverflow)
AR (1) AR242291A1 (enrdf_load_stackoverflow)
AT (1) ATE72021T1 (enrdf_load_stackoverflow)
BR (1) BR8901661A (enrdf_load_stackoverflow)
CH (1) CH674664A5 (enrdf_load_stackoverflow)
DE (1) DE58900742D1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3232544B2 (ja) * 1993-11-24 2001-11-26 株式会社豊田自動織機 車両空調用圧縮機の堰構造
CN104879289A (zh) * 2015-05-22 2015-09-02 蚌埠高科能源装备有限公司 一种活塞式压缩机机体回油结构
CN113229974B (zh) * 2021-04-30 2022-09-30 深圳素士科技股份有限公司 泵壳、泵组件及口腔护理装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1408638A (en) * 1920-06-03 1922-03-07 Ingersoll Rand Co Compressor
GB771334A (en) * 1954-12-22 1957-03-27 Friedrich Hagans Improvements in single acting piston machines

Also Published As

Publication number Publication date
AR242291A1 (es) 1993-03-31
EP0336892A1 (de) 1989-10-11
JPH01285679A (ja) 1989-11-16
BR8901661A (pt) 1989-11-21
DE58900742D1 (de) 1992-03-05
CH674664A5 (enrdf_load_stackoverflow) 1990-06-29
ATE72021T1 (de) 1992-02-15

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