US20190338768A1 - Method for Producing a Housing of a Rotary Screw Compressor - Google Patents

Method for Producing a Housing of a Rotary Screw Compressor Download PDF

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Publication number
US20190338768A1
US20190338768A1 US16/333,508 US201716333508A US2019338768A1 US 20190338768 A1 US20190338768 A1 US 20190338768A1 US 201716333508 A US201716333508 A US 201716333508A US 2019338768 A1 US2019338768 A1 US 2019338768A1
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United States
Prior art keywords
housing
housing body
housing cover
screw
bearing
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.)
Abandoned
Application number
US16/333,508
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English (en)
Inventor
Gilles Hebrard
Jean-Baptiste Marescot
Joerg MELLAR
Thomas Weinhold
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Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
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Assigned to KNORR-BREMSE SYSTEME FUER NUTZFAHRZEUGE GMBH reassignment KNORR-BREMSE SYSTEME FUER NUTZFAHRZEUGE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Marescot, Jean-Baptiste, HEBRARD, GILLES, MELLAR, JOERG, WEINHOLD, THOMAS
Publication of US20190338768A1 publication Critical patent/US20190338768A1/en
Abandoned legal-status Critical Current

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    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/02—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C2/06—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents of other than internal-axis type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/009—Stepped drills
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • 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
    • F04C18/086—Carter
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • 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
    • F04C2210/00—Fluid
    • F04C2210/10—Fluid working
    • F04C2210/1005—Air
    • 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
    • F04C2210/00—Fluid
    • F04C2210/22—Fluid gaseous, i.e. compressible
    • F04C2210/221—Air
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/10—Manufacture by removing material
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F04C2230/603—Centering; Aligning
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/52—Bearings for assemblies with supports on both sides
    • 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
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/805—Fastening means, e.g. bolts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/16—Air or water being indistinctly used as working fluid, i.e. the machine can work equally with air or water without any modification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/50—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/60—Shafts

Definitions

  • the present invention relates to a method for producing a housing of a screw compressor, wherein the housing has at least one housing body and at least one housing cover.
  • the present invention furthermore relates to a housing of a screw compressor and to a screw compressor.
  • DD 2003 49 A1 presents a device for forming end walls on screw-type machines having at least two screw rotors, which are arranged parallel and which engage into one another in pairwise fashion, a working chamber which is composed of a casing wall tightly surrounding the screw rotors, and the end walls.
  • DE 37 37 358 A1 discloses a rotor housing for an internally mounted screw spindle pump, and a corresponding production method.
  • receiving bores of the screw spindle are provided in a housing body.
  • disk-like material pieces which have the receiving bores of the screw spindle and which are composed of wear-resistant material are inserted into the housing.
  • the wear-resistant material may in particular be ceramic, and may be arranged axially one behind the other in accordance with the lining length.
  • the invention furthermore comprises a method for producing said housing, according to which the wear-resistant material pieces are cast into the housing body by means of plastic.
  • DE 40 16 841 A1 has disclosed a method for producing a rotor housing of a screw spindle pump.
  • the housing is centrally split, such that a change can be made from internal machining to external machining by means of profile milling or profile grinding.
  • DE 19 48 589 A1 presents a method for producing housings for screw pumps.
  • the production method has multiple steps, wherein the housing is produced in unmachined form with bores larger than the finished dimension, and in each case one relatively small mandrel or core is inserted into each bore. Subsequently, a curing plastic is introduced into the annular space between mandrel and bore wall, and the mandrel is pulled out after the plastic has cured.
  • the screw rotors of a screw compressor are fastened or mounted at both ends by means of rolling bearings in the housing. It is basically necessary for the housing to be formed in two parts owing to manufacturing and assembly requirements.
  • housing body and cover are machined in different manufacturing steps, such that manufacturing accuracy and coaxiality cannot be easily realized.
  • a method for producing a housing of a screw compressor which method produces a housing of a screw compressor, wherein the housing has at least one housing body and at least one housing cover.
  • the method includes the steps of:
  • the invention is based on the underlying concept of the bolt insertion openings being formed such that they are manufactured already with the correct alignment of the bearing seats and of the screw bores with the aid of an alignment tool in the housing of the screw compressor. It is furthermore the underlying idea that, on the basis of the provisionally assembled housing body and housing cover which are already correctly aligned with respect to one another by means of the alignment tool, the bolt insertion opening is then formed both in the housing body and in the housing cover by means of a single manufacturing process, such that the bolt insertion opening is already correctly oriented.
  • the design possibilities with regard to the respective arrangement of the bearing seats therein is increased, and secondly, the manufacture thereof is simplified. Accordingly, the outlay in terms of manufacturing for the joint formation of the bearing seats would be considerably greater, because for example the joint clamping and alignment of housing cover and housing body, and/or the manufacturing tool, would be made much more complicated.
  • provision may be made whereby, in conjunction with the provisional assembly of housing body and housing cover, the housing body and housing cover are fastened to one another by means of at least one screw connection. In this way, slippage or a relative movement between housing body and housing cover is prevented. The centering or alignment is ensured by means of the alignment tool.
  • the alignment tool is pushed in from outside through the bearing seat for the screw rotor in the housing cover and through the screw bore and is thus inserted into the bearing seats in the housing body and in the housing cover.
  • Great variability in the mutual alignment of housing cover and housing body is achieved in this way, because the alignment tool can, by means of a very simple installation process, even in the case of an already loosely pre-mounted housing cover, be pushed in through said housing cover into the housing body and inserted into the corresponding bearing seat therein.
  • the alignment tool and the housing cover to firstly be jointly preassembled and only subsequently joined together and aligned with the housing body.
  • the screw connection is tightened only when the two components are already in an aligned state. If the tightening of the screw connection were performed before the housing body and housing cover have actually been aligned, undesired stresses would arise between housing cover, alignment tool and housing body, which should be avoided in any case. Furthermore, under these circumstances, the normally very expensive alignment tool may be damaged and thus rendered unusable for further use.
  • the alignment tool is additionally conceivable for the alignment tool to be of cylindrical and stepped form such that it has at least one first bearing insertion portion with a first diameter and at least one second bearing insertion portion with a second diameter.
  • the screw rotors are mounted by means of circular rolling bearings, imperatively giving rise to the cylindrical design of the bearing seats within the housing body and the housing cover.
  • the shape of the alignment tool should therefore likewise be of cylindrical form, resulting in optimum fit accuracy with the respective bearing seats.
  • the installation thereof can be simplified, because it can firstly, by means of the first, relatively small diameter, be pushed in through the bearing seat of the housing cover into the housing body and correspondingly inserted. Furthermore, by means of the stepped formation, an axial stop is formed, whereby axially defined positioning of the first bearing insertion portion and of the second bearing insertion portion in the bearing seats is ensured.
  • the first bearing insertion portion thereof is inserted in the bearing seat in the housing body and the second bearing insertion portion is inserted in the bearing seat in the housing cover.
  • the alignment of said bearing seats can be realized with high accuracy.
  • the shape and/or position tolerances of the first and second bearing insertion portions may be configured to be more exact than the rest of the shape structures of the alignment tool.
  • the manufacturing direction during the joint manufacturing process of the at least one bolt insertion opening runs from an outer side of the housing cover axially inwardly in the direction of the open end, facing toward the housing cover, of the housing body.
  • This configuration of the joint manufacturing process of the at least one bolt insertion opening permits very easy access, during the production thereof, from an outer side of the housing cover, whereby complex manufacturing steps, which under some circumstances are difficult to control, can be omitted, and the production process is additionally shortened.
  • the use of a cutting manufacturing process for the formation of the at least one bolt insertion opening is particularly advantageously expedient here owing to its widely proven application and the good levels of manufacturing accuracy that can be attained within reasonable times. Since the chip volume associated with the formation of the bolt insertion opening is relatively small, a drilling process is particularly expedient in this regard. Other manufacturing processes that are suitable in this context, such as milling, erosion, reaming or grinding or combinations of these, may likewise be used.
  • the cutting manufacturing process is performed by means of at least one cutting manufacturing tool, in particular a drilling tool, wherein the manufacturing tool is rotated and is of rotationally symmetrical form.
  • the cutting manufacturing process it is particularly advantageous for the cutting manufacturing process to be performed only by means of one cutting manufacturing tool, in particular one drilling tool.
  • the drilling tool may in this case be formed as a spiral drill, as a drilling rod, as a reamer or in some other suitable manner.
  • the drilling tool may furthermore be formed from steel, in particular HSS steel, hard metal, from steel with a hard metal coating, from steel with integrated hard metal cutting plates, or from some other suitable materials or material combinations.
  • housing body and housing cover may be separated from one another for at least one further machining or assembly step.
  • further machining steps such as milling of further working surfaces, cleaning, deburring and/or for example the insertion of the components provided in the housing interior, or the like.
  • a fit bolt is inserted into the at least one bolt insertion opening, which fit bolt is seated both partially in the housing body and partially in the housing cover.
  • the fit bolt it is possible in the assembled state for the alignment of housing body and housing cover relative to one another to be ensured.
  • An additional fastening of housing cover to housing body may be realized by additional fastening means, such as screws.
  • the accuracy of the alignment of housing cover relative to housing body can be improved.
  • the use of more than two bolt insertion openings in the housing body and housing cover may however lead to overdeterminacy and a more difficult assembly process, such that the use of in each case two bolt insertion openings is therefore particularly advantageous.
  • the present invention furthermore relates to a housing of a screw compressor obtained by means of the method described above.
  • the present invention furthermore relates to a screw compressor having a housing obtained by means of the method described above.
  • FIG. 1 shows a schematic sectional illustration of an exemplary embodiment of a screw compressor according to the invention, the housing of which has been produced by means of a production method according to the invention;
  • FIG. 2 shows a sectional illustration through the housing, produced by means of the production method according to the invention, of the screw compressor as per FIG. 1 , as the bolt insertion openings are being formed;
  • FIG. 3 shows a sectional illustration through the housing, produced by means of the production method according to the invention, of the screw compressor as per FIG. 1 , after the bolt insertion openings have been formed;
  • FIG. 4 shows a sectional illustration through the housing, produced by means of the production method according to the invention, of the screw compressor as per FIG. 1 , after assembly of the housing.
  • FIG. 1 shows, in a schematic sectional illustration, a screw compressor 10 in the context of an exemplary embodiment of the present invention, the housing 20 of which screw compressor is produced by means of a production method according to the invention.
  • the screw compressor 10 has a fastening flange 12 for the mechanical fastening of the screw compressor 10 to a drive (not shown in any more detail here) in the form of an electric motor.
  • the screw rotor 18 meshes with the screw motor 16 and is driven by means of the latter.
  • the screw compressor 10 has a housing 20 in which the main components of the screw compressor 10 are accommodated.
  • the housing 20 is filled with oil 22 .
  • an inlet connector 24 is provided on the housing 20 of the screw compressor 10 .
  • the inlet connector 24 is in this case designed such that an air filter 26 is arranged at said inlet connector.
  • an air inlet 28 is provided radially on the air inlet connector 24 .
  • a spring-loaded valve insert 30 which is designed here as an axial seal.
  • This valve insert 30 serves as a check valve.
  • an air feed channel 32 Downstream of the valve insert 30 , there is provided an air feed channel 32 which feeds the air to the two screw rotors 16 , 18 .
  • an air outlet pipe 34 with a riser line 36 .
  • a temperature sensor 38 In the region of the end of the riser line 36 , there is provided a temperature sensor 38 by means of which the oil temperature can be monitored.
  • a holder 40 for an air deoiling element 42 is also provided in the air outlet region.
  • the holder 40 for the air deoiling element has the air deoiling element 42 in the region facing toward the base (as also shown in FIG. 1 ).
  • a corresponding filter screen or known filter and oil separating devices 44 is also provided, in the interior of the air deoiling element 42 , which will not be specified in any more detail.
  • the holder for the air deoiling element 42 has an air outlet opening 46 which leads to a check valve 48 and a minimum pressure valve 50 .
  • the check valve 48 and the minimum pressure valve 50 may also be formed in one common combined valve.
  • the air outlet 51 is provided downstream of the check valve 48 .
  • the air outlet 51 is generally connected to correspondingly known compressed-air consumers.
  • a riser line 52 is provided which has a filter and check valve 54 at the outlet of the holder 40 for the air deoiling element 42 at the transition into the housing 20 .
  • a nozzle 56 is provided, downstream of the filter and check valve 54 , in a housing bore.
  • the oil return line 58 leads back into approximately the central region of the screw rotor 16 or of the screw rotor 18 in order to feed oil 22 thereto again.
  • An oil drain screw 59 is provided within the base region, in the assembled state, of the housing 20 .
  • the attachment piece 60 to which the oil filter 62 is fastened. Via an oil filter inlet channel 64 , which is arranged in the housing 20 , the oil 22 is conducted firstly to a thermostat valve 66 .
  • thermostat valve 66 it is also possible for an open-loop and/or closed-loop control device to be provided by means of which the oil temperature of the oil 22 situated in the housing 20 can be monitored and set to a setpoint value.
  • a nozzle 72 which is provided in the housing 20 in conjunction with the return line 68 .
  • the cooler 74 is connected to the attachment piece 60 .
  • a safety valve 76 In the upper region of the housing 20 (in relation to the assembled state), there is situated a safety valve 76 , by means of which an excessively high pressure in the housing 20 can be dissipated.
  • bypass line 78 Upstream of the minimum pressure valve 50 , there is situated a bypass line 78 , which leads to a relief valve 80 .
  • a ventilation valve (not shown in any more detail) and also a nozzle (diameter constriction of the feeding line).
  • an oil level sensor 82 may be provided in the outer wall of the housing 20 .
  • Said oil level sensor 82 may for example be an optical sensor, and may be designed and configured such that, on the basis of the sensor signal, it can be identified whether the oil level during operation is above the oil level sensor 82 or whether the oil level sensor 82 is exposed, and thus the oil level has correspondingly fallen.
  • an alarm unit which outputs or transmits a corresponding error message or fault message to the user of the system.
  • the function of the screw compressor 10 shown in FIG. 1 is as follows.
  • Air is fed via the air inlet 28 and passes via the check valve 30 to the screw rotors 16 , 18 , where the air is compressed.
  • the compressed air-oil mixture which, having been compressed by a factor of between 5 and 16 downstream of the screw rotors 16 and 18 , rises through the outlet line 34 via the riser pipe 36 , is blown directly onto the temperature sensor 38 .
  • the air which still partially carries oil particles, is then conducted via the holder 40 into the air deoiling element 42 and, if the corresponding minimum pressure is attained, passes into the air outlet line 51 .
  • the oil 22 situated in the housing 20 is kept at operating temperature via the oil filter 62 and possibly via the heat exchanger 74 .
  • the heat exchanger 74 is not used and is also not activated.
  • the corresponding activation is performed by means of the thermostat valve 66 .
  • oil is fed via the line 68 of the screw rotor 18 or of the screw rotor 16 , and also to the bearing 70 .
  • the screw rotor 16 or the screw rotor 18 is supplied with oil 22 via the return line 52 , 58 , and the purification of the oil 22 takes place here in the air deoiling element 42 .
  • the electric motor (not shown in any more detail), which transmits its torque via the shaft 14 to the screw rotor 16 , which in turn meshes with the screw rotor 18 , the screw rotors 16 and 18 of the screw compressor 10 are driven.
  • the relief valve 80 (not shown in any more detail), it is ensured that the high pressure that prevails for example at the outlet side of the screw rotors 16 , 18 in the operational state cannot be enclosed in the region of the feed line 32 , and that, instead, in particular during the start-up of the compressor, there is always a low inlet pressure, in particular atmospheric pressure, prevailing in the region of the feed line 32 .
  • FIG. 2 shows a sectional illustration through the screw compressor 10 as per FIG. 1 , the housing 20 according to the invention of which is manufactured by means of a production method according to the invention.
  • FIG. 2 also shows the joint manufacturing process during the formation of the bolt insertion openings 104 .
  • the housing 20 is composed of a housing body 20 a and a housing cover 20 b.
  • the housing body 20 a is of substantially pot-shaped form and has an open end 120 and an oppositely situated partially open end 124 .
  • the housing body 20 a is an integral constituent part of the housing 20 of the screw compressor 10 .
  • Two bearing seats 108 are formed within the partially open end 124 of the housing body 20 a.
  • the two bearing seats 108 are formed substantially as cylindrical passage bores in the partially open end 124 of the housing body 20 a.
  • One of the two bearing seats 108 is formed as a stepped passage bore with a first, relatively large diameter as first bearing seat portion.
  • the further portion of the passage bore with the relatively small diameter is formed as a first cylindrical transition bore and extends from the first bearing seat portion to an outer surface of the partially open end 124 of the housing body 20 a.
  • the other screw bearing seat 108 is formed as a non-stepped passage bore with a substantially continuously uniform diameter dimension.
  • the non-stepped passage bore is divided axially into a second bearing seat portion and a second cylindrical transition bore.
  • the second cylindrical transition bore extends from the second bearing seat portion to an outer surface of the partially open end 124 of the housing body 20 a.
  • the open end 120 of the housing body 20 a has a planar surface 126 which is oriented perpendicular to the central axes of the two bearing seats 108 .
  • the housing cover 20 b is arranged by way of a further planar inner surface 128 .
  • the housing body 20 a and the housing cover 20 b have multiple screw connections (not illustrated in FIG. 2 ).
  • the two screw bores 112 , 114 are, in the assembled state of the housing 20 , spatially delimited not only by the pot-like structure of the housing body 20 a but also by the planar inner surface 128 of the housing cover 20 b.
  • the planar inner surface 128 of the housing cover 20 b is likewise oriented substantially perpendicular to the central axes of the bearing seats 108 .
  • Two further bearing seats 110 are formed within the housing cover 20 b.
  • the two further bearing seats 110 are formed substantially as cylindrical countersunk bores within a planar outer surface 130 of the housing cover 20 b.
  • the bearing seats 110 are furthermore connected in each case by means of a cylindrical transition bore within the housing cover 20 b to the screw bores 112 , 114 , which transition bore is arranged in each case between the bearing seats 110 and the screw bores 112 , 114 .
  • the bearing seats 110 of the housing cover 20 b and the two bearing seats 108 of the housing body 108 are, in the assembled state of the housing 20 , aligned substantially coaxially with respect to one another.
  • FIG. 2 in the provisionally assembled state of the housing 20 , two alignment tools 100 , 102 have been inserted into the bearing seats 108 of the housing body 20 a and into the bearing seats 110 of the housing cover 20 b.
  • the alignment tools 100 , 102 are in each case of cylindrical and stepped form.
  • the alignment tools 100 , 102 are consequently composed in each case of a first elongate cylinder and a second cylinder, which is connected integrally and coaxially by means of an end side to an end side of the first elongate cylinder.
  • the diameter of the second cylinder is furthermore larger than the diameter of the first elongate cylinder.
  • the alignment tools 100 , 102 have an axial stop at the transition in each case between the first elongate cylinder and second cylinder.
  • the alignment tools 100 , 102 furthermore each have a first bearing insertion portion 116 with a first diameter.
  • the alignment tools 100 , 102 each have a second bearing insertion portion 118 with a second diameter.
  • the first bearing insertion portion 116 is arranged at the free end portion of the first elongate cylinder.
  • the second bearing insertion portion 118 in turn is arranged at that end portion of the second cylinder which faces toward the first elongate cylinder.
  • the two alignment tools 100 , 102 extend continuously from the bearing seats 110 of the housing cover 20 b through the screw bores 112 , 114 to the bearing seats 108 .
  • the first bearing insertion portion 116 is consequently inserted in each case in the bearing seat 108 in the housing body 20 a , and the second bearing insertion portion 116 is inserted in each case in the bearing seat 110 in the housing cover 20 b.
  • Two bolt insertion openings 104 are provided in the housing body 20 a.
  • the two bolt insertion openings 104 are formed as countersunk bores or blind bores in an outer circumferential region of the planar surface 126 of the open end 120 of the housing body 20 a by means of a drilling tool 122 .
  • the two bolt insertion openings 104 are formed as passage bores in an outer circumferential region of the planar inner surface 128 of the housing cover by means of a drilling tool 122 .
  • the two bolt insertion openings 104 of the housing body 20 a and of the housing cover 20 b may be aligned at an alignment angle of 180° with respect to one another.
  • FIG. 3 shows a sectional illustration through the housing 20 , produced by means of the production method according to the invention, as per FIG. 2 , after the bolt insertion openings 104 have been formed.
  • the two bolt insertion openings 104 formed both in the housing body 20 a and in the housing cover 20 b , are aligned so as to be coaxially flush with one another.
  • FIG. 4 shows a sectional illustration through the housing 20 , produced by means of the production method according to the invention, as per FIG. 2 , after assembly of the housing 20 .
  • the two fit bolts 106 are inserted both partially in the housing body 20 a and partially in the housing cover 20 b.
  • bearing seats 108 , 110 for the screw rotors 16 , 18 of the screw compressor 10 are formed in the housing body 20 a and in the housing cover 20 b.
  • the formation of the bearing seats 108 , 110 for the two screw rotors 16 , 18 of the screw compressor 10 in the housing body 20 a and in the housing cover 20 b is however performed in separate manufacturing processes.
  • the formation of the cylindrical transition bores into housing body 20 a and housing cover 20 b is performed in a joint manufacturing process with the bearing seats 108 , 110 .
  • housing body 20 a and housing cover 20 b may also be performed in a separate manufacturing process in relation to the bearing seats 108 , 110 .
  • the two screw bores 112 , 114 for the screw rotors 16 , 18 of the screw compressor 10 are formed in the housing body 20 a.
  • the formation of the screw bores 112 , 114 and of the bearing seats 108 in the housing body 20 a may also be performed in a joint manufacturing process.
  • the formation of the two screw bores 112 , 114 for the screw rotors 16 , 18 of the screw compressor 10 in the housing body 20 a is performed by means of a milling process.
  • Provisional assembly of housing body 20 a and housing cover 20 b is then performed using the alignment tools 100 , 102 in order to ensure the alignment of the screw rotor central axes with the central axes of the bearing seats 108 , 110 and of the screw bores 112 , 114 .
  • the alignment tools 100 , 102 are pushed in from the outside in each case through the bearing seats 110 for the screw rotors 16 , 18 in the housing cover 20 b and through the screw bores 112 , 114 .
  • alignment tools 100 , 102 are inserted into the two bearing seats 108 , 110 in the housing body 20 a and in the housing cover 20 b.
  • the multiple screw connections are tightened only after the insertion of the alignment tools 100 , 102 into the two bearing seats 108 , 110 in the housing body 20 a and in the housing cover 20 b.
  • the manufacturing direction during the joint drilling process of the two bolt insertion openings 104 runs from an outer side of the housing cover 20 b axially inwardly in the direction of the open end 120 , facing toward the housing cover 20 b , of the housing body 20 a.
  • the joint drilling process is performed with an adjustable feed in a manufacturing direction.
  • the drilling tool 122 is firstly set in rotation and moved into the vicinity of the outer surface of the housing cover 20 b at the position in which the bolt insertion openings 104 are to be drilled.
  • the drilling tool 122 is, already at the start of the joint drilling process, aligned perpendicular to the planar inner surface 128 of the housing cover 20 b.
  • the bolt insertion opening 104 is drilled by the drilling tool 122 as a passage bore into the housing cover 20 b in the manufacturing direction.
  • the bolt insertion opening 104 thus formed is therefore formed as a countersunk bore or blind bore into the housing body.
  • the joint drilling process is jointly ended, which involves the drilling tool 122 being fully retracted out of the housing body 20 a and the housing cover 20 b counter to the manufacturing direction.
  • the drilling tool 122 may be rotated during the full retraction.
  • housing body 20 a and housing cover 20 b are fastened to one another by means of multiple screw connections.
  • housing body 20 a and housing cover 20 b After the provisional assembly of housing body 20 a and housing cover 20 b , these are separated from one another again.
  • housing body 20 a and housing cover 20 b are separated for at least one further machining or assembly step.
  • a further machining step may for example be the cutting machining in the inner regions of the housing body 20 a or of the housing cover 20 b.
  • a further machining step may constitute the cleaning and/or the deburring of the bolt insertion openings 104 .
  • Further assembly steps may for example be the insertion of all components in the housing interior and relevant for the functional fulfilment by the screw compressor 10 and the final assembly of the housing 20 .
  • housing body 20 a and housing cover 20 b During the assembly of housing body 20 a and housing cover 20 b , in each case one fit bolt 106 is then inserted into the bolt insertion openings 104 , which fit bolt is seated both in the housing body 20 a and in the housing cover 20 b.
  • the fit bolt serves for correspondingly safeguarding and fixing the positioning of housing cover 20 b relative to the housing body 20 a.
  • the non-positively locking fastening itself may be realized for example by means of screw connections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rolling Contact Bearings (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Milling Processes (AREA)
US16/333,508 2016-09-21 2017-09-19 Method for Producing a Housing of a Rotary Screw Compressor Abandoned US20190338768A1 (en)

Applications Claiming Priority (5)

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DE102016011433.9 2016-09-21
DE102016011433 2016-09-21
DE102017100537.4 2017-01-12
DE102017100537.4A DE102017100537A1 (de) 2016-09-21 2017-01-12 Verfahren zum Herstellen eines Gehäuses eines Schraubenkompressors
PCT/EP2017/073595 WO2018054886A1 (de) 2016-09-21 2017-09-19 Verfahren zum herstellen eines gehäuses eines schraubenkompressors

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US16/333,334 Abandoned US20190338770A1 (en) 2016-09-21 2017-09-19 Method for Producing a Housing of a Screw Compressor
US16/333,508 Abandoned US20190338768A1 (en) 2016-09-21 2017-09-19 Method for Producing a Housing of a Rotary Screw Compressor
US16/355,083 Abandoned US20190211825A1 (en) 2016-09-21 2019-03-15 Screw Compressor System for a Utility Vehicle

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US16/355,083 Abandoned US20190211825A1 (en) 2016-09-21 2019-03-15 Screw Compressor System for a Utility Vehicle

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EP (3) EP3516219A1 (de)
JP (3) JP2019529807A (de)
KR (3) KR20190045936A (de)
CN (4) CN109715952A (de)
BR (3) BR112019005099A2 (de)
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JP2019532224A (ja) 2019-11-07
CN116398434A (zh) 2023-07-07
US20190211825A1 (en) 2019-07-11
JP2019529807A (ja) 2019-10-17
BR112019005055A2 (pt) 2019-06-18
CN109937286A (zh) 2019-06-25
KR20190045352A (ko) 2019-05-02
US20190338770A1 (en) 2019-11-07
EP3516221A1 (de) 2019-07-31
WO2018054860A1 (de) 2018-03-29
DE102017104087A1 (de) 2018-03-22
KR20190045936A (ko) 2019-05-03
WO2018054886A1 (de) 2018-03-29
WO2018054887A1 (de) 2018-03-29
EP3516219A1 (de) 2019-07-31
EP3516221B1 (de) 2022-04-20
BR112019005099A2 (pt) 2019-06-04
KR20190045351A (ko) 2019-05-02
DE102017100537A1 (de) 2018-03-22
CN109715952A (zh) 2019-05-03
BR112019005102A2 (pt) 2019-06-04
JP2019529797A (ja) 2019-10-17
WO2018054886A8 (de) 2019-05-23
CN109952438A (zh) 2019-06-28
EP3516173A1 (de) 2019-07-31

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