EP1957797A1 - Compresseur à vis pourvu d'une chemise de refroidissement - Google Patents

Compresseur à vis pourvu d'une chemise de refroidissement

Info

Publication number
EP1957797A1
EP1957797A1 EP06754260A EP06754260A EP1957797A1 EP 1957797 A1 EP1957797 A1 EP 1957797A1 EP 06754260 A EP06754260 A EP 06754260A EP 06754260 A EP06754260 A EP 06754260A EP 1957797 A1 EP1957797 A1 EP 1957797A1
Authority
EP
European Patent Office
Prior art keywords
cooling
housing
rotor housing
partition
rotor
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
EP06754260A
Other languages
German (de)
English (en)
Other versions
EP1957797B1 (fr
Inventor
Carsten Achtelik
Dieter HÜTTERMANN
Michael Besseling
Norbert Henning
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.)
GHH Rand Schraubenkompressoren GmbH
Original Assignee
GHH Rand Schraubenkompressoren GmbH
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 GHH Rand Schraubenkompressoren GmbH filed Critical GHH Rand Schraubenkompressoren GmbH
Publication of EP1957797A1 publication Critical patent/EP1957797A1/fr
Application granted granted Critical
Publication of EP1957797B1 publication Critical patent/EP1957797B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2220/00—Application
    • F04C2220/40—Pumps with means for venting areas other than the working chamber, e.g. bearings, gear chambers, shaft seals

Definitions

  • the invention relates to a screw compressor with a rotor housing in which two screw rotors, which mesh with one another with helical ribs and groove, are rotatably supported in parallel axes, and with a cooling housing which surrounds the rotor housing at a distance and which forms a cooling space together with the rotor housing and at least one inlet opening and has an outlet opening for a coolant flowing through the cooling space.
  • a screw compressor of this type is e.g. B. from DE 201 10 360.5 Ul known as part of a two-stage screw compressor.
  • the invention is particularly applicable to a screw compressor that uses a gaseous medium such.
  • a gaseous medium such.
  • B. air compressed to very high pressures, in the range of 30 to 50 bar, in particular approximately 40 bar, and which can in particular be the high-pressure stage of a two-stage or multi-stage compressor unit.
  • the compression to very high pressures is associated with a strong heating of the gaseous medium, so that particularly effective cooling is desirable.
  • the screw compressor proposed according to the invention to achieve the object is specified in claim 1.
  • the dependent claims relate to further advantageous features of the screw compressor. It is achieved by the invention that the coolant in the cooling space flows around the outer surface of the rotor housing in the circumferential direction over almost 360 °. Furthermore, the coolant is sharply deflected when it flows into the cooling space and before it flows out at the partition wall connecting the rotor housing to the cooling jacket. It was found that a very intensive cooling effect is achieved here, in particular also in the area of the partition wall, which acts like a cooling fin.
  • FIG. 1 shows a perspective, partially sectioned view of the screw compressor according to an embodiment of the invention
  • FIG. 2 shows a cross section of the screw compressor from FIG. 1 approximately along the section line II-II from FIG. 1,
  • FIG. 3 shows a section substantially along the line III-III of FIG. 2.
  • the screw compressor shown in FIG. 1 has a rotor housing 1, shown in section, in which two rotors 3 and 5 are rotatably mounted in parallel axes.
  • the axes of rotation of the rotors 3, 5 lie in a common vertical plane, which is also the sectional plane for the representation of the rotor housing 1.
  • Each rotor has a profile section 7 or 9, which has a profile with helically extending ribs or grooves, the ribs and grooves of the two profile sections 7, 9 meshing and sealingly in a contact-free manner.
  • Shaft journals 7a, 7b, 9a, 9b adjoin the profile sections 7, 9 on both sides, with their peripheral surface cooperating with sealing arrangements 11, 12 in order to seal the rotor in the rotor housing 1.
  • the shaft journals 7a, 7b, 9a, 9b are also rotatably supported in the rotor housing 1 by bearings 13, 15.
  • the upper rotor 3 in FIG. 1 is the main rotor and has an extension 7c of its shaft journal at its left end in FIG.
  • Drive gear (not shown) is determined, which meshes with a corresponding gear of a drive gear (not shown) to drive the rotor 3 for rotation.
  • the two rotors 3, 5 have two meshing gears 17, 19 which form a synchronizing gear which rotates from the upper rotor 3 to the lower rotor 5, which is the secondary rotor, in the desired speed ratio transmits.
  • the screw compressor shown in FIG. 1 When the screw compressor shown in FIG. 1 is operating, its suction chamber 10, which is formed in the rotor housing 1 at the left end of the profile sections 7 and 9 in FIG. 1 and is connected to a suction nozzle (not shown), the gas to be compressed, in particular air , fed.
  • the gas supplied is preferably already pre-compressed by one or more upstream compressor stages (not shown) to an intermediate pressure, for example to a pressure in the range from 10 to 15 bar, preferably approximately 12 bar.
  • This precompressed gas is conveyed to the right by the profile sections 7, 9 of the two rotors 3, 5 in FIG. 1 and is compressed to a final pressure which is preferably in the range from 30 to 50 bar, in particular around 40 bar.
  • the compressed gas leaves the rotor housing 1 at the right end of the profile sections 7, 9 in FIG. 1 through an outlet (not shown).
  • the rotor housing 1 is surrounded by a cooling jacket or cooling housing 21, which is predominantly formed in one piece with the rotor housing 1 and surrounds it at a distance.
  • the cooling housing 21 has large openings at the top and bottom, which are closed by means of a cover plate 23 and a base plate 25 which are fastened by screws. Between the rotor housing 1 and the cooling housing 21, 23, 25 there is a cooling space 27 which surrounds the rotor housing 1 in a ring.
  • FIG. 2 shows schematically and simplified a cross section approximately along the line II - II of Figure 1.
  • the rotor housing 1 for receiving the screw rotors (not shown) is surrounded by the cooling jacket or cooling housing 21, the side walls 21a, 21b of which are preferably in one piece with the rotor housing 1 and which is closed at the top and bottom by the cover wall 23 or base plate 25.
  • the cooling housing 21 forms with the rotor housing 1 a cooling space 27 which surrounds the rotor housing 1 in a substantially completely annular manner and which is interrupted only at one point by a partition wall 29 connecting the rotor housing 1 to the side wall 21b of the cooling housing 21.
  • the partition 29 runs horizontally approximately halfway between the axis centers Ml, M2 of the screw rotors arranged vertically one above the other.
  • the cooling housing 21 has an inlet opening 31 and an outlet opening 33 for cooling liquid, for. B. cooling water or oil.
  • the inlet opening 31 opens into an inlet channel 35 which runs vertically upwards, the upper outlet opening 35 'of which is at a distance from the underside of the partition wall 29.
  • the black arrows in FIG. 2 indicate the flow path of the coolant supplied to the inlet opening 31. This is perpendicular through the inflow channel 35
  • a ventilation opening 41 with a small cross section is formed at a height which corresponds approximately to the upper limit of the outlet opening 33. Air can escape through this ventilation opening 41 when the cooling space 27 is filled with coolant, as indicated by the upper dotted arrows in FIG. 2, so that the cooling space 27 up to the height of the ventilation opening 41, ie up to that indicated by line 43 in FIG. 2 Liquid level, can be filled and the volume of the residual air trapped above the liquid level 43 is very small.
  • a seepage opening 47 of very small cross-section is formed in the wall 45 separating the inflow channel 35 from the cooling space 27 at the lower limit of the inlet opening 31.
  • cooling liquid When the cooling liquid is emptied from the cooling space 27, cooling liquid can drain through the seepage opening 47 and the inlet opening 31 (as indicated by the lower dotted arrows in FIG. 2) until the cooling liquid level in the cooling space 27 has reached the height of the seepage opening 47, ie to has dropped to the level indicated by line 49.
  • the residual amount of cooling liquid remaining below line 49 when the cooling chamber 27 is emptied is therefore very small.
  • FIG. 3 shows further details of the invention which relate to the sealing arrangements 11 shown in FIG. 1 for sealing the pressure-side shaft journals 7b, 9b of the rotors 3, 5 in the rotor housing 1.
  • the sealing arrangement 11 consists of a number of ring seals I Ia, I Ib arranged in a row. In the illustrated embodiment, eight ring seals I Ia, I Ib are arranged one behind the other. The ring seals I Ia, 1 Ib can preferably be lip seals, as such. B. is known from EP 0 993 553.
  • the seal arrangement 11 is surrounded by a first annular relief chamber 51 for collecting leakage gas passing through the seals 11a.
  • the relief space 51 can advantageously be between the first number of five sealing rings 11a seen from the rotor profile 7 and the last three, i. H. outer ring seals are 1 Ib.
  • the relief chamber 51 is connected to the suction chamber 10 of the screw compressor by a connecting channel 53 formed in the rotor housing 1 parallel to the rotor axis.
  • the annular relief chamber 51 is therefore subjected to the suction pressure of the screw compressor prevailing in the suction chamber 10.
  • the air supplied to the suction chamber 10 can already be brought up to a pressure of, for example, upstream by the compressor stages. B. between 10 and 15 bar, in particular about 12 bar, and this is also the pressure prevailing in the relief chamber 51.
  • the high final pressure generated by the rotors e.g. B.
  • the first relief chamber 51 which is charged with the inlet pressure of the compressor, predefines a defined intermediate pressure at a defined point in the seal arrangement, thereby equalizing the pressure drop across the entire seal arrangement I Ia, I Ib, whereby the seals I Ib are mechanically relieved.
  • a second annular relief space 55 is provided, which is connected to the atmosphere in a manner known per se.
  • the purpose of this second relief chamber 55 is to keep the oil system used for lubricating the bearings 15 and the synchronous gear 17, 19 free of pressure and to keep the leakage gas through the seal arrangement 11 to the oil-lubricated areas as small as possible.
  • the connecting channel 53 connecting the relief chamber 51 to the suction chamber 10 in the rotor housing 1 preferably runs in the immediate vicinity of the partition wall 29 connecting the rotor housing 1 to the cooling housing 21, thanks to the intensive cooling of the partition wall 29, which acts like a cooling fin the coolant deflected at it, the connecting channel 53, and thus the leakage gas flowing in it to the suction space 10, is subjected to particularly intensive cooling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Supercharger (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Abstract

Le carter de rotor (1) d'un compresseur à vis est entouré par une enveloppe de refroidissement (21, 23, 25) formant une chambre de refroidissement (27) qui entoure de manière circulaire le carter de rotor (1), laquelle chambre est coupée en un point par une paroi de séparation (29) reliant le carter de rotor (1) à l'enveloppe de refroidissement (21). Un fluide de refroidissement amené vers un orifice d'admission (31) est dirigé à travers un canal d'admission (35), orienté verticalement vers le haut, contre la face inférieure de la paroi de séparation (29), où sa trajectoire est inversée, puis circule tout autour du carter de rotor (1) jusqu'à la face supérieure de la paroi de séparation (29), où sa trajectoire est à nouveau inversée, et est évacué vers l'orifice d'évacuation (33) à travers un canal d'évacuation (37) s'étendant verticalement vers le haut. Un orifice de drainage (47) pratiqué dans la paroi du canal d'admission (35) et un orifice de purge d'air (41) pratiqué dans la paroi du canal d'évacuation (37) permettent de veiller à ce que la chambre de refroidissement (27) ne renferme qu'une très faible quantité d'air résiduel lorqu'elle est remplie de liquide de refroidissement et une très faible quantité de liquide résiduel lorsqu'elle est vidée.
EP06754260.5A 2005-12-08 2006-06-09 Compresseur à vis pourvu d'une chemise de refroidissement Active EP1957797B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005058698 2005-12-08
PCT/EP2006/005557 WO2007065485A1 (fr) 2005-12-08 2006-06-09 Compresseur à vis pourvu d'une chemise de refroidissement

Publications (2)

Publication Number Publication Date
EP1957797A1 true EP1957797A1 (fr) 2008-08-20
EP1957797B1 EP1957797B1 (fr) 2016-09-28

Family

ID=36763690

Family Applications (4)

Application Number Title Priority Date Filing Date
EP06754261.3A Active EP1979618B1 (fr) 2005-12-08 2006-06-09 Groupe de compresseurs à vis à plusieurs étages
EP06754262A Withdrawn EP1957799A1 (fr) 2005-12-08 2006-06-09 Compresseur à vis
EP06762002A Active EP1957798B1 (fr) 2005-12-08 2006-06-09 Compresseur à vis
EP06754260.5A Active EP1957797B1 (fr) 2005-12-08 2006-06-09 Compresseur à vis pourvu d'une chemise de refroidissement

Family Applications Before (3)

Application Number Title Priority Date Filing Date
EP06754261.3A Active EP1979618B1 (fr) 2005-12-08 2006-06-09 Groupe de compresseurs à vis à plusieurs étages
EP06754262A Withdrawn EP1957799A1 (fr) 2005-12-08 2006-06-09 Compresseur à vis
EP06762002A Active EP1957798B1 (fr) 2005-12-08 2006-06-09 Compresseur à vis

Country Status (7)

Country Link
US (4) US7713039B2 (fr)
EP (4) EP1979618B1 (fr)
CN (2) CN101321955A (fr)
AT (1) ATE498071T1 (fr)
DE (1) DE502006008894D1 (fr)
ES (1) ES2359015T3 (fr)
WO (4) WO2007065484A1 (fr)

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Publication number Publication date
WO2007065487A1 (fr) 2007-06-14
US7690901B2 (en) 2010-04-06
ES2359015T3 (es) 2011-05-17
US9091268B2 (en) 2015-07-28
EP1957797B1 (fr) 2016-09-28
US7713039B2 (en) 2010-05-11
CN101321955A (zh) 2008-12-10
CN101321954A (zh) 2008-12-10
HK1127111A1 (en) 2009-09-18
US20080286129A1 (en) 2008-11-20
US20130011285A1 (en) 2013-01-10
EP1979618A1 (fr) 2008-10-15
DE502006008894D1 (de) 2011-03-24
EP1979618B1 (fr) 2016-04-27
CN101321954B (zh) 2012-06-13
ATE498071T1 (de) 2011-02-15
US20080286138A1 (en) 2008-11-20
WO2007065484A1 (fr) 2007-06-14
WO2007065486A1 (fr) 2007-06-14
EP1957798A1 (fr) 2008-08-20
US20090004036A1 (en) 2009-01-01
EP1957798B1 (fr) 2011-02-09
WO2007065485A1 (fr) 2007-06-14
EP1957799A1 (fr) 2008-08-20

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