EP3516226B1 - Screw-type compressor for a utility vehicle - Google Patents

Screw-type compressor for a utility vehicle Download PDF

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Publication number
EP3516226B1
EP3516226B1 EP17778213.3A EP17778213A EP3516226B1 EP 3516226 B1 EP3516226 B1 EP 3516226B1 EP 17778213 A EP17778213 A EP 17778213A EP 3516226 B1 EP3516226 B1 EP 3516226B1
Authority
EP
European Patent Office
Prior art keywords
oil
seal
screw compressor
housing
air
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.)
Active
Application number
EP17778213.3A
Other languages
German (de)
French (fr)
Other versions
EP3516226A1 (en
Inventor
Gilles Hebrard
Jean-Baptiste Marescot
Jörg MELLAR
Thomas Weinhold
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.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
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Publication date
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Publication of EP3516226A1 publication Critical patent/EP3516226A1/en
Application granted granted Critical
Publication of EP3516226B1 publication Critical patent/EP3516226B1/en
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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
    • F04C18/12—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
    • 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
    • F01C21/007—General arrangements of parts; Frames and supporting elements
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/026—Lubricant separation
    • 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
    • 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
    • F04C2240/80—Other components
    • F04C2240/809—Lubricant sump
    • 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
    • F05B2240/57—Seals
    • 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
    • F05B2260/00—Function
    • F05B2260/98—Lubrication

Definitions

  • the present invention relates to a screw compressor for a commercial vehicle with at least one housing with at least one housing body and with at least one rotor housing, and with at least one baffle plate and with at least one seal, with an oil sump being present in the housing in the assembled state.
  • Screw compressors for commercial vehicles are already known from the prior art. Such screw compressors are used to provide the necessary compressed air for example for the braking system of the commercial vehicle.
  • oil-filled compressors in particular also screw compressors, are known in which the task is to regulate the oil temperature.
  • This is usually achieved by having an external oil cooler that is connected to the oil-filled compressor and the oil circuit via a thermostatic valve.
  • the oil cooler is a heat exchanger which has two separate circuits, the first circuit being provided for the hot liquid, that is to say the compressor oil, and the second being provided for the cooling liquid.
  • air, water mixtures with an antifreeze agent or another oil can be used as the coolant.
  • This oil cooler must then be connected to the compressor oil circuit via pipes or hoses and the oil circuit must be secured against leaks.
  • This external volume must also be filled with oil, so that the total amount of oil is also increased. This increases the system inertia.
  • the oil cooler must be housed and fastened mechanically, either by means of brackets located around it or by a separate bracket, which requires additional fastening means, but also installation space.
  • the compressor can be a screw compressor for a commercial vehicle.
  • the BE 857230 discloses a screw compressor with partition walls arranged in the housing of the screw compressor, so that several compartments are provided inside the screw compressor, but which do not form a seal.
  • the object of the present invention is to advantageously develop a screw compressor for a utility vehicle of the type mentioned at the outset, in particular to the effect that the removal of oil from the compressed air can be improved and simplified.
  • a screw compressor for a commercial vehicle with the features of claim 1.
  • a screw compressor for a commercial vehicle with at least one housing with at least one housing body and with at least one rotor housing, with at least one baffle plate and with at least one Seal is provided, with an oil sump present in the housing in the assembled state, the seal being arranged between the housing body and rotor housing and protruding from the oil sump in relation to the assembled state, the seal at least partially separating the interior of the housing body from the interior of the rotor housing and wherein the baffle is based on the assembled state horizontal alignment of the screw compressor and horizontal alignment of the oil sump is aligned essentially parallel to the upper level of the oil sump.
  • the housing can be designed in two parts or in several parts.
  • the multi-part structure is produced in particular in that the housing is assembled from a housing body and a rotor housing.
  • the invention is based on the basic idea of restricting the movement of the oil within the screw compressor by arranging appropriate elements, such as a seal and the baffle, which allow the oil to partially pass through. This ensures that the oil sump moves “below” the baffle even when the vehicle is in motion and that horizontal sloshing movements can also be prevented by the seal protruding from the oil sump. As a result, the entry of oil into corresponding elements for removing oil from the compressed air, such as an air oil separator or the like, can be reduced.
  • the baffle plate can have at least one, in particular several oil passage openings.
  • oil passage openings can be designed, for example, as elongated, rounded slots. This makes it possible for oil to rise from the oil sump, for example in the form of oil vapor or oil-aerosol, and to distribute itself inside the screw compressor.
  • the baffle plate and the seal subdivide the interior of the screw compressor into several interconnected compartments. This makes it possible to keep the oil in the corresponding compartments inside the screw compressor or to essentially provide oil vapor in certain compartments and to hold the oil sump or liquid oil in certain compartments.
  • the seal asymmetrically divides the housing interior into at least one first area and at least one second area, the first area being smaller than the second area.
  • This can For example, it can be achieved that certain areas that are to be supplied more with small oil droplets, oil aerosols or oil vapors are better reached and the first area, which is smaller than the second area, less with small oil droplets, oil aerosols or . Oil vapors are supplied.
  • the screw compressor can have an air-oil separator and an air-oil separator inlet, the air-oil separator inlet opening into the housing interior of the screw compressor and the passage openings of the seal being arranged in the vicinity of the air-oil separator inlet.
  • This makes it possible to make the air oil separator comparatively smaller.
  • it is possible to limit the entry of oil into the air oil separator through the design and arrangement of the seal. Because the passage openings of the seal are arranged in the vicinity of the air-oil separator inlet, the oil entry into the air-oil separator inlet and thus into the air-oil separator is already reduced.
  • the air-oil separator inlet is formed in the housing cover. This makes it easier to manufacture the air oil separator inlet.
  • the arrangement of the air oil separator inlet and the seal, which is located between the housing cover and the housing body in the assembled state, can also be adjusted in a comparatively simple manner.
  • the air-oil separator inlet opens into the first area of the housing interior.
  • the oil separator inlet opens into the area of the housing interior, which is designed to be smaller than the second area, the first and second areas being separated from one another by the seal.
  • the seal is arranged essentially vertically in relation to the assembled state with an essentially horizontal alignment of the screw compressor and with an essentially horizontal alignment of the oil sump. This makes it possible to simplify the return of the oil caught on the seal to the oil sump. As a result of gravity, this can simply flow back into the oil sump.
  • the passage openings can be designed essentially round, in particular circular. This design of the passage openings enables a simple Manufacture and manufacture of the seal. However, any other shape of the through openings is also possible in this context. This can result in further advantages, for example that the limitation of the displacement of oil by small oil droplets, oil vapors or oil aerosols is improved.
  • the seal is designed as a perforated plate, at least in some areas with the areas located inside the housing in the assembled state. This enables simple manufacture and manufacture of the seal.
  • the stability of the seal can also be influenced and made positive in this way. By a uniform arrangement of the holes in the areas in which the seal is designed as a perforated plate, a good area of passage openings can be provided without weakening the seal as a whole.
  • the seal can also have a baffle through opening.
  • the baffle plate passage opening is designed such that it is located approximately at the level of the surface of the oil sump in the assembled state.
  • the baffle plate and the seal can be arranged essentially perpendicular to one another. The formation of the baffle passage opening allows a simple design and assembly of the seal and baffle plate.
  • baffle makes it possible to keep essential parts of the oil sump in the deeper areas of the screw compressor even when the screw compressor is in operation and especially when the utility vehicle is being driven, and not to have to compensate for the oil sloshing back and forth.
  • the seal can have screw bolt through openings which are provided for the passage of screw bolts, by means of which the seal, housing body and rotor housing are screwed together. This enables simple, secure and reliable assembly of the seal between the housing body and the rotor housing.
  • seal and the baffle are plugged into one another. This facilitates the assembly and manufacture of the screw compressor as well as the seal and the baffle plate.
  • the seal and the baffle plate can be arranged crosswise to one another. This enables a simple and clear definition of compartments and also the corresponding areas inside the screw compressor.
  • the seal and the baffle plate are arranged essentially perpendicular to one another. This arrangement achieves a sensible division in the interior of the screw compressor. In addition, such an arrangement is helpful to use the seal in combination with the baffle plate as a vertical "baffle plate" in order to reliably prevent horizontal surge movements, to create the greatest possible obstacle effect and at the same time to allow drainage along the seal towards the oil sump.
  • Fig. 1 shows a schematic sectional view of a screw compressor 10 in the sense of an exemplary embodiment of the present invention.
  • the screw compressor 10 has a fastening flange 12 for the mechanical fastening of the screw compressor 10 to an electric motor not shown in detail here.
  • the screw 18 meshes with the screw 16 and is driven by this.
  • the screw compressor 10 has a housing 20 in which the essential 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 designed such that an air filter 26 is arranged on it.
  • an air inlet 28 is provided radially on the air inlet connector 24.
  • a spring-loaded valve insert 30 is provided, designed here as an axial seal.
  • This valve insert 30 serves as a check valve.
  • An air supply channel 32 is provided downstream of the valve insert 30 and supplies the air to the two screws 16, 18.
  • an air outlet pipe 34 with a riser 36 is provided on the output side of the two screws 16, 18.
  • a temperature sensor 38 is provided, by means of which the oil temperature can be monitored.
  • a holder 40 for an air oil separator 42 is also provided in the air outlet area.
  • the holder 40 for the air oil separator has in the area facing the floor (as also in FIG Fig. 1 shown) the air oil separator 42.
  • the holder for the air oil separator 40 has an air outlet opening 46 which lead to a check valve 48 and a minimum pressure valve 50.
  • the check valve 48 and the minimum pressure valve 50 can also be formed in a common, combined valve.
  • the air outlet 51 is provided downstream of the check valve 48.
  • the air outlet 51 is usually connected to correspondingly known compressed air consumers.
  • a riser 52 is provided which has a filter and check valve 54 at the exit of the holder 40 for the air oil separator 42 when it passes into the housing 20.
  • a nozzle 56 is provided in a housing bore downstream of the filter and check valve 54.
  • the oil return line 58 leads back approximately to the middle area of the screw 16 or the screw 18 in order to supply oil 22 again.
  • An oil drain plug 59 is provided in the bottom area of the housing 20 in the assembled state. Via the oil drain screw 59, a corresponding oil drain opening are opened through which the oil 22 can be drained.
  • the housing 20 In the lower area of the housing 20 there is also the extension 60 to which the oil filter 62 is attached.
  • the oil 22 is first fed to a thermostatic valve 66 via an oil filter inlet channel 64 which is arranged in the housing 20.
  • thermostat valve 66 a control and / or regulating device can be provided, by means of which the oil temperature of the oil 22 located in the housing 20 can be monitored and adjusted to a setpoint value.
  • a nozzle 72 is also provided, which is provided in the housing 20 in connection with the return line 68.
  • the cooler 74 is connected to the extension 60.
  • a safety valve 76 In the upper area of the housing 20 (in relation to the assembled state) there is a safety valve 76, by means of which excess pressure in the housing 20 can be reduced.
  • a bypass line 78 which leads to a relief valve 80, is located upstream of the minimum pressure valve 50. Air can be fed back into the area of the air inlet 28 via this relief valve 80, which is controlled by means of a connection to the air supply 32.
  • a vent valve (not shown in more detail) and also a nozzle (diameter reduction of the supply line) can be provided in this area.
  • an oil level sensor 82 can be provided approximately at the level of the line 34 in the outer wall of the housing 20.
  • This oil level sensor 82 can be, for example, an optical sensor and can be constructed and set up such that it can be recognized on the basis of the sensor signal whether the oil level is above the oil level sensor 82 during operation or whether the oil level sensor 82 is exposed and the oil level has fallen accordingly as a result.
  • an alarm unit can also be provided that outputs or forwards a corresponding error message or warning message to the user of the system.
  • the function of the in Fig. 1 shown screw compressor 10 is as follows: Air is supplied via the air inlet 28 and reaches the screws 16, 18 via the check valve 30, where the air is compressed. The compressed air-oil mixture, which rises with a factor of between 5 and 16 times compression after the screws 16 and 18 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 guided via the holder 40 into the air-oil separator 42 and, if the corresponding minimum pressure is reached, reaches the air outlet line 51.
  • the oil 22 located 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 switched on.
  • the corresponding connection takes place via the thermostatic valve 68.
  • oil is fed to the screw 18 or the screw 16, but also to the bearing 72, via the line 68.
  • the screw 16 or the screw 18 is supplied with oil 22 via the return line 52, 58; here the oil 22 is purified in the air-oil separator 42.
  • the screws 16 and 18 of the screw compressor 10 are driven by the electric motor, not shown in detail, which transmits its torque via the shaft 14 to the screw 16, which in turn meshes with the shaft 18.
  • the relief valve 80 ensures that in the area of the supply line 32, the high pressure that prevails in the operating state, for example on the outlet side of the screws 16, 18, cannot be locked in, but that especially when the compressor starts up in the area of the supply line 32 there is a low inlet pressure, in particular atmospheric pressure. Otherwise, when the compressor starts up, a very high pressure would initially arise on the output side of the screws 16 and 18, which would overload the drive motor.
  • FIG. 2 shows the screw compressor 10 according to FIG Fig. 1 in a sectional view with a view of the interior of the housing 20 of the screw compressor 10.
  • a baffle plate 100 is arranged in the interior of the housing 20 and is located essentially at the level of the upper level of the oil sump of the oil 22. This is based on the assembled state and a horizontal arrangement of the upper level of the oil sump.
  • the housing 20 has a housing cover 20b and a rotor housing 20a.
  • An air-oil separator inlet 102 which is connected to the air-oil separator 42, is located in the housing cover 20b.
  • a seal 104 is provided between the housing cover 20b and the rotor housing 20a, which is circumferentially guided between the edges of the housing cover 20b and rotor housing 20a in the assembled state and is clamped and screwed sealingly between them.
  • the seal 104 has screw bolt through openings 106 through which corresponding screw connections are passed by means of screw bolts can, so that seal 104, housing cover 20b and rotor housing 20a can be screwed to one another or are screwed to one another in the assembled state.
  • the seal 104 is arranged between the housing cover 20b and the rotor housing 20a and protrudes from the oil sump of the oil 22.
  • the seal 104 is designed as a sealing plate and has several through openings 108.
  • the passage openings 108 are circular and are regularly offset from one another in the manner of a perforated plate in the area of the seal 104 located above the oil sump.
  • the seal 104 divides the interior of the housing asymmetrically into at least one first area B1, which essentially relates to the inner areas of the housing cover 20b, and a second area B2, which essentially relates to the interior of the rest of the housing 20, that is to say the rotor housing 20a.
  • the first area B1 is smaller than the second area B2.
  • the air oil separator inlet 102 opens into the first region B1 and is located in the vicinity of the passage openings 108 of the seal 104.
  • the seal 104 is arranged vertically in relation to the assembled state when the screw compressor 10 is oriented essentially horizontally and the oil sump 22 is oriented essentially horizontally.
  • seal 104 has a passage opening 110 for the baffle 100 at the level of the upper level of the oil sump of the oil 22.
  • the baffle plate 100 has a plurality of oil passage openings, which are designed as elongated slots.
  • the baffle plate 100 and the seal 104 divide the interior of the screw compressor 10 into a plurality of interconnected compartments K1, K2, K3 and K4.
  • the compartments K2 and K3 are the compartments K2 and K3 in which the oil sump of the oil 22 is located.
  • the compartment K1 is located in the area B1 and the compartment K4 is located in the area B2.
  • the seal 104 and the baffle plate 100 are plugged into one another and are arranged in a cross manner to one another.
  • the seal 104 and baffle plate 100 are arranged essentially perpendicular to one another.
  • the function of the seal 104 and its passage openings 108 can be described as follows: During operation, the screws 16 and 18 are lubricated by pressurized oil from the oil 22 from the oil sump, so that oil vapors, small oil droplets or oil aerosols are present above the upper level of the oil sump. Further oil movements are forced by the driving movements of the utility vehicle, so that the movement of the oil 22 and the movement possibilities of the oil 22 are restricted by means of the baffle 100 and also the seal 104. At the same time, however, the through openings 108 both in the baffle plate 100 and in the seal 104 ensure that sufficient oil 22 can reach all areas of the screw compressor 10 in the form of small oil droplets, oil vapors or oil aerosols.
  • the oil entry into the air-oil separator inlet 102 is reduced. This takes place through the passage openings 108 of the seal 104, since less oil 22 can reach the air-oil separator inlet 102 due to the perforated plate-like structure of the seal 104. As a result, the entry of oil into the air oil separator 42 is reduced.
  • the arrangement of the seal 104 and baffle plate 100 also has the function that horizontal surge movements can also be prevented or reduced.
  • Baffle plate 100 and seal 104 thus act as a blockade against horizontal surge movements, in particular in the direction of air-oil separator inlet 102, and thus limit the entry of oil into air-oil separator 42.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
  • Rotary Pumps (AREA)

Description

Die vorliegende Erfindung betrifft einen Schraubenkompressor für ein Nutzfahrzeug mit wenigstens einem Gehäuse mit wenigstens einem Gehäusekorpus und mit wenigstens einem Rotorengehäuse, und mit wenigstens einem Schwallblech und mit wenigstens einer Dichtung, wobei im montiertenZustand im Gehäuse ein Ölsumpf vorhanden ist.The present invention relates to a screw compressor for a commercial vehicle with at least one housing with at least one housing body and with at least one rotor housing, and with at least one baffle plate and with at least one seal, with an oil sump being present in the housing in the assembled state.

Aus dem Stand der Technik sind bereits Schraubenkompressoren für Nutzfahrzeuge bekannt. Derartige Schraubenkompressoren werden verwendet, um die notwendige Druckluft für beispielsweise das Bremssystem des Nutzfahrzeugs bereitzustellen.Screw compressors for commercial vehicles are already known from the prior art. Such screw compressors are used to provide the necessary compressed air for example for the braking system of the commercial vehicle.

In diesem Zusammenhang sind insbesondere Öl befüllte Kompressoren, insbesondere auch Schraubenkompressoren bekannt, bei denen sich als Aufgabe stellt, die Öltemperatur zu regulieren. Dies wird in der Regel dadurch bewerkstelligt, dass ein externer Ölkühler vorhanden ist, der mit dem Öl befüllten Kompressor und dem Ölkreislauf über ein Thermostatventil verbunden ist. Der Ölkühler ist dabei ein Wärmetauscher, der zwei voneinander getrennte Kreisläufe aufweist, wobei der erste Kreislauf für die heiße Flüssigkeit, also das Kompressoröl, vorgesehen ist und der zweite für die Kühlflüssigkeit. Als Kühlflüssigkeit können beispielsweise Luft, Wassergemische mit einem Frostschutzmittel oder einem anderen Öl verwendet werden.In this context, oil-filled compressors, in particular also screw compressors, are known in which the task is to regulate the oil temperature. This is usually achieved by having an external oil cooler that is connected to the oil-filled compressor and the oil circuit via a thermostatic valve. The oil cooler is a heat exchanger which has two separate circuits, the first circuit being provided for the hot liquid, that is to say the compressor oil, and the second being provided for the cooling liquid. For example, air, water mixtures with an antifreeze agent or another oil can be used as the coolant.

Dieser Ölkühler muss sodann mit dem Kompressorölkreislauf über Rohre oder Schläuche verbunden werden und der Ölkreislauf muss gegen Leckagen gesichert werden.This oil cooler must then be connected to the compressor oil circuit via pipes or hoses and the oil circuit must be secured against leaks.

Dieses externe Volumen muss des Weiteren mit Öl befüllt werden, so dass auch die Gesamtmenge an Öl vergrößert wird. Dadurch wird die Systemträgheit vergrößert. Darüber hinaus muss der Ölkühler mechanisch untergebracht und befestigt werden, entweder durch umliegend befindliche Halterungen oder durch eine gesonderte Halterung, was zusätzliche Bestigungsmittel, aber auch Bauraum benötigt.This external volume must also be filled with oil, so that the total amount of oil is also increased. This increases the system inertia. In addition, the oil cooler must be housed and fastened mechanically, either by means of brackets located around it or by a separate bracket, which requires additional fastening means, but also installation space.

Aus der US 4,780,061 ist bereits ein Schraubenkompressor mit einer integrierten Ölkühlung bekannt.From the U.S. 4,780,061 a screw compressor with integrated oil cooling is already known.

Aus der JP 2004-176701 ist bereits ein Dampfabscheider für einen flüssigkeitsgekühlten Kompressor bekannt. Bei dem Kompressor kann es sich um einen Schraubenkompressor für ein Nutzfahrzeug handeln.From the JP 2004-176701 a vapor separator for a liquid-cooled compressor is already known. The compressor can be a screw compressor for a commercial vehicle.

Die BE 857230 offenbart einen Schraubenkompressor mit im Gehäuse des Schraubenkompressors angeordneten Trennwänden, so dass im Inneren des Schraubenkompressors mehrere Kompartimente vorgesehen sind, die jedoch keine Dichtung ausbilden.The BE 857230 discloses a screw compressor with partition walls arranged in the housing of the screw compressor, so that several compartments are provided inside the screw compressor, but which do not form a seal.

Aus der JP 2002-295383 ist weiter ein Schraubenkompressor bekannt mit einem Ölreservoir, wobei das Öl entsprechend im Schraubenkompressorgehäuse zirkulieren soll. Auch hier sind im Gehäuse mehrere Kompartimente durch Trennwände entsprechend ausgebildet.From the JP 2002-295383 a screw compressor is also known with an oil reservoir, the oil to circulate accordingly in the screw compressor housing. Here, too, several compartments are formed accordingly by partition walls in the housing.

Es ist die Aufgabe der vorliegenden Erfindung, einen Schraubenkompressor für ein Nutzfahrzeug der eingangs genannten Art in vorteilhafter Weise weiterzubilden, insbesondere dahingehend, dass das Entfernen von Öl aus der komprimierten Luft verbessert und vereinfacht werden kann.The object of the present invention is to advantageously develop a screw compressor for a utility vehicle of the type mentioned at the outset, in particular to the effect that the removal of oil from the compressed air can be improved and simplified.

Diese Aufgabe wird erfindungsgemäß gelöst durch einen Schraubenkompressor für ein Nutzfahrzeug mit den Merkmalen des Anspruchs 1. Danach ist vorgesehen, dass ein Schraubenkompressor für ein Nutzfahrzeug mit wenigstens einem Gehäuse mit wenigstens einem Gehäusekorpus und mit wenigstens einem Rotorengehäuse, mit wenigstens einem Schwallblech und mit wenigstens einer Dichtung versehen ist, wobei im montierten Zustand im Gehäuse ein Ölsumpf vorhanden ist, wobei bezogen auf den montierten Zustand die Dichtung zwischen Gehäusekorpus und Rotorengehäuse angeordnet ist und aus dem Ölsumpf herausragt, wobei die Dichtung das Innere des Gehäuseskorpus vom Inneren des Rotorengehäuses zumindest teilweise voneinander trennt und wobei das Schwallblech bezogen auf den montierten Zustand bei horizontaler Ausrichtung des Schraubenkompressors und bei horizontaler Ausrichtung des Ölsumpfes im Wesentlichen parallel zum oberen Level des Ölsumpfes ausgerichtet ist.This object is achieved according to the invention by a screw compressor for a commercial vehicle with the features of claim 1. Thereafter, it is provided that a screw compressor for a commercial vehicle with at least one housing with at least one housing body and with at least one rotor housing, with at least one baffle plate and with at least one Seal is provided, with an oil sump present in the housing in the assembled state, the seal being arranged between the housing body and rotor housing and protruding from the oil sump in relation to the assembled state, the seal at least partially separating the interior of the housing body from the interior of the rotor housing and wherein the baffle is based on the assembled state horizontal alignment of the screw compressor and horizontal alignment of the oil sump is aligned essentially parallel to the upper level of the oil sump.

Das Gehäuse kann zweiteilig oder mehrteilig ausgebildet sein. Die Mehrteiligkeit wird insbesondere dadurch hergestellt, dass das Gehäuse aus einem Gehäusekorpus und einem Rotorengehäuse zusammengefügt wird.The housing can be designed in two parts or in several parts. The multi-part structure is produced in particular in that the housing is assembled from a housing body and a rotor housing.

Die Erfindung basiert auf dem Grundgedanken, die Bewegung des Öles innerhalb des Schraubenkompressors einzuschränken durch die Anordnung entsprechender, das Öl teilweise durchlassender Elemente wie einer Dichtung und des Schwallbleches. Hierdurch wird erreicht, dass der Ölsumpf auch im Fahrbetrieb sich « unterhalb » des Schwallbleches bewegt und dass auch horizontale Schwallbewegungen durch die aus dem Ölsumpf herausragende Dichtung unterbunden werden können. Hierdurch kann der Öleintrag in entsprechende Elemente zum Entfernen von Öl aus der komprimierten Luft, wie beispielsweise ein Luftölabscheider oder dergleichen verringert werden.The invention is based on the basic idea of restricting the movement of the oil within the screw compressor by arranging appropriate elements, such as a seal and the baffle, which allow the oil to partially pass through. This ensures that the oil sump moves “below” the baffle even when the vehicle is in motion and that horizontal sloshing movements can also be prevented by the seal protruding from the oil sump. As a result, the entry of oil into corresponding elements for removing oil from the compressed air, such as an air oil separator or the like, can be reduced.

Das Schwallblech kann wenigstens eine, insbesondere mehrere Öldurchtrittsöffnungen aufweisen. Derartige Öldurchtrittsöffnungen können beispielsweise als längliche, abgerundete Schlitze ausgebildet sein. Hierdurch wird es möglich, dass Öl vom Ölsumpf beispielsweise öldampfförmig oder öl-aerosolförmig aufsteigen und sich im Inneren des Schraubenkompressors verteilen kann.The baffle plate can have at least one, in particular several oil passage openings. Such oil passage openings can be designed, for example, as elongated, rounded slots. This makes it possible for oil to rise from the oil sump, for example in the form of oil vapor or oil-aerosol, and to distribute itself inside the screw compressor.

Des Weiteren kann vorgesehen sein, dass das Schwallblech und die Dichtung das Innere des Schraubenkompressors in mehrere miteinander verbundene Kompartimente unterteilen. Hierdurch wird es möglich, dass Öl in den entsprechenden Kompartimenten im Inneren des Schraubenkompressors zu halten bzw. in bestimmten Kompartimenten Öldampf im Wesentlichen vorzusehen und in bestimmten Kompartimenten den Ölsumpf bzw. flüssiges Öl vorzuhalten.Furthermore, it can be provided that the baffle plate and the seal subdivide the interior of the screw compressor into several interconnected compartments. This makes it possible to keep the oil in the corresponding compartments inside the screw compressor or to essentially provide oil vapor in certain compartments and to hold the oil sump or liquid oil in certain compartments.

Des Weiteren kann vorgesehen sein, dass die Dichtung das Gehäuseinnere asymmetrisch in wenigstens einen ersten Bereich und wenigstens einen zweiten Bereich teilt, wobei der erste Bereich kleiner ist als der zweite Bereich. Hierdurch kann beispielsweise erreicht werden, dass bestimmte Bereiche, die stärker mit kleinen Öltröpfchen, Öl-Aerosolen bzw. Öldämpfen versorgt werden sollen, besser erreicht werden und der erste Bereich, der kleiner ausgebildet ist als der zweite Bereich, weniger mit kleinen Öltröpfchen, Öl-Aerosolen bzw. Öldämpfen versorgt wird.Furthermore, it can be provided that the seal asymmetrically divides the housing interior into at least one first area and at least one second area, the first area being smaller than the second area. This can For example, it can be achieved that certain areas that are to be supplied more with small oil droplets, oil aerosols or oil vapors are better reached and the first area, which is smaller than the second area, less with small oil droplets, oil aerosols or . Oil vapors are supplied.

Der Schraubenkompressor kann einen Luftölabscheider aufweisen und einen Luftölabscheiderzulauf, wobei der Luftölabscheiderzulauf in das Gehäuseinnere des Schraubenkompressors mündet und wobei die Durchtrittsöffnungen der Dichtung in der Nähe des Luftölabscheiderzulaufs angeordnet sind. Hierdurch wird es möglich, den Luftölabscheider vergleichsweise kleiner auszubilden. Insbesondere wird es möglich, den Öleintrag in den Luftölabscheider durch die Ausbildung und Anordnung der Dichtung zu begrenzen. Dadurch, dass in der Nähe des Luftölabscheiderzulaufs die Durchtrittsöffnungen der Dichtung angeordnet sind, vermindert sich bereits der Öleintrag in den Luftölabscheiderzulauf und damit in den Luftölabscheider.The screw compressor can have an air-oil separator and an air-oil separator inlet, the air-oil separator inlet opening into the housing interior of the screw compressor and the passage openings of the seal being arranged in the vicinity of the air-oil separator inlet. This makes it possible to make the air oil separator comparatively smaller. In particular, it is possible to limit the entry of oil into the air oil separator through the design and arrangement of the seal. Because the passage openings of the seal are arranged in the vicinity of the air-oil separator inlet, the oil entry into the air-oil separator inlet and thus into the air-oil separator is already reduced.

Darüber hinaus kann vorgesehen sein, dass der Luftölabscheiderzulauf im Gehäusedeckel ausgebildet ist. Dadurch wird es erleichtert, den Luftölabscheiderzulauf zu fertigen. Auch kann hierdurch vergleichsweise einfach die Anordnung von Luftölabscheiderzulauf und Dichtung, die sich im montierten Zustand zwischen Gehäusedeckel und Gehäusekorpus befindet, eingestellt werden.
Insbesondere kann vorgesehen sein, dass der Luftölabscheiderzulauf in den ersten Bereich des Gehäuseinneren mündet. Folglich mündet der Ölabscheiderzulauf in dem Bereich des Gehäuseinneren, der kleiner ausgebildet ist als der zweite Bereich, wobei der erste und der zweite Bereich durch die Dichtung voneinander getrennt werden. Darüber hinaus kann vorgesehen sein, dass bezogen auf den montierten Zustand bei im Wesentlichen horizontaler Ausrichtung des Schraubenkompressors und bei im Wesentlichen horizontaler Ausrichtung des Ölsumpfes die Dichtung im Wesentlichen senkrecht angeordnet ist. Dadurch wird es möglich, die Rückführung des sich an der Dichtung fangenden Öles in den Ölsumpf zu vereinfachen. Infolge der Schwerkraft kann dieses einfach wieder in den Ölsumpf zurückfließen.In addition, it can be provided that the air-oil separator inlet is formed in the housing cover. This makes it easier to manufacture the air oil separator inlet. The arrangement of the air oil separator inlet and the seal, which is located between the housing cover and the housing body in the assembled state, can also be adjusted in a comparatively simple manner.
In particular, it can be provided that the air-oil separator inlet opens into the first area of the housing interior. As a result, the oil separator inlet opens into the area of the housing interior, which is designed to be smaller than the second area, the first and second areas being separated from one another by the seal. In addition, it can be provided that the seal is arranged essentially vertically in relation to the assembled state with an essentially horizontal alignment of the screw compressor and with an essentially horizontal alignment of the oil sump. This makes it possible to simplify the return of the oil caught on the seal to the oil sump. As a result of gravity, this can simply flow back into the oil sump.

Die Durchtrittsöffnungen können im Wesentlichen rund, insbesondere kreisrund ausgebildet sein. Diese Gestaltung der Durchtrittsöffnungen ermöglicht eine einfache Fertigung und Herstellung der Dichtung. Allerdings ist in diesem Zusammenhang auch jede andere Form der Druchtrittsöffnungen möglich. Dadurch können sich weitere Vorteile ergeben, beispielsweise, dass die Begrenzung der Verlagerung von Öl durch kleine Öltröpfchen, Öldämpfe oder Öl-Aerosole verbessert wird.The passage openings can be designed essentially round, in particular circular. This design of the passage openings enables a simple Manufacture and manufacture of the seal. However, any other shape of the through openings is also possible in this context. This can result in further advantages, for example that the limitation of the displacement of oil by small oil droplets, oil vapors or oil aerosols is improved.

Darüber hinaus kann vorgesehen sein, dass die Dichtung zumindest bereichsweise mit dem im montierten Zustand im Gehäuseinneren befindlichen Bereichen als Lochplatte ausgebildet ist. Dies ermöglicht eine einfache Fertigung und Herstellung der Dichtung. Die Stabilität der Dichtung kann hierdurch auch beeinflusst und positiv gestaltet werden. Durch eine gleichmäßige Anordnung der Löcher in den Bereichen, in denen die Dichtung als Lochplatte ausgebildet ist, lässt sich eine gute Fläche an Durchtrittsöffnungen bereitstellen, ohne die Dichtung insgesamt zu schwächen.In addition, it can be provided that the seal is designed as a perforated plate, at least in some areas with the areas located inside the housing in the assembled state. This enables simple manufacture and manufacture of the seal. The stability of the seal can also be influenced and made positive in this way. By a uniform arrangement of the holes in the areas in which the seal is designed as a perforated plate, a good area of passage openings can be provided without weakening the seal as a whole.

Die Dichtung kann weiter eine Schwallblechdurchtrittsöffnung aufweisen. Denkbar ist insbesondere, dass die Schwallblechdurchtrittsöffnung derart ausgebildet ist, dass sie sich im montierten Zustand ungefähr auf der Höhe des Levels der Oberfläche des Ölsumpfes befindet. Das Schwallblech und die Dichtung können im Wesentlichen zueinander senkrecht angeordnet sein. Durch die Ausbildung der Schwallblechdurchtrittsöffnung wird insgesamt eine einfache Gestaltung und Montage von Dichtung und Schwallblech ermöglicht.The seal can also have a baffle through opening. In particular, it is conceivable that the baffle plate passage opening is designed such that it is located approximately at the level of the surface of the oil sump in the assembled state. The baffle plate and the seal can be arranged essentially perpendicular to one another. The formation of the baffle passage opening allows a simple design and assembly of the seal and baffle plate.

Das Vorsehen eines Schwallbleches ermöglicht es, wesentliche Teile des Ölsumpfes auch im Betrieb des Schraubenkompressors und insbesondere im Fahrbetrieb des Nutzfahrzeuges in den tieferliegenden Bereichen des Schraubenkompressors zu behalten und nicht ein Hin- und Herschwappen des Öles ausgleichen zu müssen.The provision of a baffle makes it possible to keep essential parts of the oil sump in the deeper areas of the screw compressor even when the screw compressor is in operation and especially when the utility vehicle is being driven, and not to have to compensate for the oil sloshing back and forth.

Die Dichtung kann Schraubbolzendurchtrittsöffnungen aufweisen, die für den Durchtritt von Schraubbolzen vorgesehen sind, mittels derer Dichtung, Gehäusekorpus und Rotorengehäuse miteinander verschraubt werden. Hierdurch wird eine einfache, sichere und zuverlässige Montage der Dichtung zwischen Gehäusekorpus und Rotorengehäuse ermöglicht.The seal can have screw bolt through openings which are provided for the passage of screw bolts, by means of which the seal, housing body and rotor housing are screwed together. This enables simple, secure and reliable assembly of the seal between the housing body and the rotor housing.

Außerdem kann vorgesehen sein, dass die Dichtung und das Schwallblech ineinander gesteckt sind. Dies erleichtert die Montage und Fertigung des Schraubenkompressors sowie der Dichtung und des Schwallbleches.In addition, it can be provided that the seal and the baffle are plugged into one another. This facilitates the assembly and manufacture of the screw compressor as well as the seal and the baffle plate.

Die Dichtung und das Schwallblech können kreuzartig zueiander angeordnet sein. Dies ermöglicht eine einfache und klare Definition von Kompartimenten und auch der entsprechenden Bereiche im Inneren des Schraubenkompressors.The seal and the baffle plate can be arranged crosswise to one another. This enables a simple and clear definition of compartments and also the corresponding areas inside the screw compressor.

Darüber hinaus kann vorgesehen sein, dass die Dichtung und das Schwallblech im Wesentlichen senkrecht zueinander angeordnet sind. Durch diese Anordnung wird eine sinnvolle Aufteilung im Rauminneren des Schraubenkompressors erreicht. Darüber hinaus ist eine derartige Anordnung hilfreich, die Dichtung in Kombination mit dem Schwallblech als senkrechte « Schwallplatte » zu nutzen, um horizontale Schwallbewegungen sicher zu unterbinden, hierfür größtmögliche Hinderniswirkung aufzubauen und gleichzeitig ein Ablaufen entlang der Dichtung in Richtung Ölsumpf zu ermöglichen.In addition, it can be provided that the seal and the baffle plate are arranged essentially perpendicular to one another. This arrangement achieves a sensible division in the interior of the screw compressor. In addition, such an arrangement is helpful to use the seal in combination with the baffle plate as a vertical "baffle plate" in order to reliably prevent horizontal surge movements, to create the greatest possible obstacle effect and at the same time to allow drainage along the seal towards the oil sump.

Weitere Einzelheiten und Vorteile der Erfindung sollen nun anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert werden.Further details and advantages of the invention will now be explained in more detail using an exemplary embodiment shown in the drawings.

Es zeigen:

Fig. 1
eine schematische Schnittzeichnung durch einen erfindungsgemäßen Schraubenkompressor; und
Fig. 2
eine perspektivische Schnittdarstellung durch den Schraubenkompressor mit Blick auf das Gehäuseinnere des Schraubenkompressors.
Show it:
Fig. 1
a schematic sectional drawing through a screw compressor according to the invention; and
Fig. 2
a perspective sectional view through the screw compressor with a view of the interior of the screw compressor.

Fig. 1 zeigt in einer schematischen Schnittdarstellung einen Schraubenkompressor 10 im Sinne eines Ausführungsbeispiels für die vorliegende Erfindung. Fig. 1 shows a schematic sectional view of a screw compressor 10 in the sense of an exemplary embodiment of the present invention.

Der Schraubenkompressor 10 weist einen Befestigungsflansch 12 zur mechanischen Befestigung des Schraubenkompressors 10 an einem hier nicht näher gezeigten Elektromotor auf.The screw compressor 10 has a fastening flange 12 for the mechanical fastening of the screw compressor 10 to an electric motor not shown in detail here.

Gezeigt ist jedoch die Eingangswelle 14, über die das Drehmoment vom Elektromotor auf eine der beiden Schrauben 16 und 18, nämlich die Schraube 16 übertragen wird.What is shown, however, is the input shaft 14, via which the torque from the electric motor is transmitted to one of the two screws 16 and 18, namely the screw 16.

Die Schraube 18 kämmt mit der Schraube 16 und wird über diese angetrieben.The screw 18 meshes with the screw 16 and is driven by this.

Der Schraubenkompressor 10 weist ein Gehäuse 20 auf, in dem die wesentlichen Komponenten des Schraubenkompressors 10 untergebracht sind.The screw compressor 10 has a housing 20 in which the essential components of the screw compressor 10 are accommodated.

Das Gehäuse 20 ist mit Öl 22 befüllt.The housing 20 is filled with oil 22.

Lufteingangsseitig ist am Gehäuse 20 des Schraubenkompressors 10 ein Einlassstutzen 24 vorgesehen. Der Einlassstutzen 24 ist dabei derart ausgebildet, dass an ihm ein Luftfilter 26 angeordnet ist. Außerdem ist radial am Lufteinlassstutzen 24 ein Lufteinlass 28 vorgesehen.On the air inlet side, an inlet connector 24 is provided on the housing 20 of the screw compressor 10. The inlet connector 24 is designed such that an air filter 26 is arranged on it. In addition, an air inlet 28 is provided radially on the air inlet connector 24.

Im Bereich zwischen Einlassstutzen 24 und der Stelle, an dem der Einlassstutzen 24 am Gehäuse 20 ansetzt, ist ein federbelasteter Ventileinsatz 30 vorgesehen, hier als Axialdichtung ausgeführt.In the area between the inlet connector 24 and the point at which the inlet connector 24 attaches to the housing 20, a spring-loaded valve insert 30 is provided, designed here as an axial seal.

Dieser Ventileinsatz 30 dient als Rückschlagventil.This valve insert 30 serves as a check valve.

Stromabwärts des Ventileinsatzes 30 ist ein Luftzuführkanal 32 vorgesehen, der die Luft den beiden Schrauben 16, 18 zuführt.An air supply channel 32 is provided downstream of the valve insert 30 and supplies the air to the two screws 16, 18.

Ausgangsseitig der beiden Schrauben 16, 18 ist ein Luftauslassrohr 34 mit einer Steigleitung 36 vorgesehen.On the output side of the two screws 16, 18, an air outlet pipe 34 with a riser 36 is provided.

Im Bereich des Endes der Steigleitung 36 ist ein Temperaturfühler 38 vorgesehen, mittels dessen die Öltemperatur überwachbar ist.In the area of the end of the riser pipe 36, a temperature sensor 38 is provided, by means of which the oil temperature can be monitored.

Weiter vorgesehen ist im Luftauslassbereich ein Halter 40 für einen Luftölabscheider 42.A holder 40 for an air oil separator 42 is also provided in the air outlet area.

Der Halter 40 für den Luftölabscheider weist im montierten Zustand im dem Boden zugewandten Bereich (wie auch in Fig. 1 gezeigt) den Luftölabscheider 42 auf.In the assembled state, the holder 40 for the air oil separator has in the area facing the floor (as also in FIG Fig. 1 shown) the air oil separator 42.

Weiter vorgesehen ist im Inneren des Luftölabscheiders 42 ein entsprechendes Filtersieb bzw. bekannte Filter- und Ölabscheidevorrichtungen 44, die nicht näher im Einzelnen spezifiziert werden.Also provided in the interior of the air oil separator 42 is a corresponding filter screen or known filter and oil separating devices 44, which are not specified in detail.

Im zentralen oberen Bereich, bezogen auf den montierten und betriebsfertigen Zustand (also wie in Fig. 1 gezeigt), weist der Halter für den Luftölabscheider 40 eine Luftausgangsöffnung 46 auf, die zu einem Rückschlagventil 48 und einem Mindestdruckventil 50 führen. Das Rückschlagventil 48 und das Mindestdruckventil 50 können auch in einem gemeinsamen, kombinierten Ventil ausgebildet sein.In the central upper area, based on the assembled and ready-to-use condition (i.e. as in Fig. 1 shown), the holder for the air oil separator 40 has an air outlet opening 46 which lead to a check valve 48 and a minimum pressure valve 50. The check valve 48 and the minimum pressure valve 50 can also be formed in a common, combined valve.

Nachfolgend des Rückschlagventils 48 ist der Luftauslass 51 vorgesehen.The air outlet 51 is provided downstream of the check valve 48.

Der Luftauslass 51 ist mit entsprechend bekannten Druckluftverbrauchern in der Regel verbunden.The air outlet 51 is usually connected to correspondingly known compressed air consumers.

Um das im Luftölabscheider 42 befindliche und abgeschiedene Öl 22 wieder in das Gehäuse 20 zurückzuführen, ist eine Steigleitung 52 vorgesehen, die ausgangs des Halters 40 für den Luftölabscheider 42 beim Übertritt in das Gehäuse 20 ein Filter- und Rückschlagventil 54 aufweist.In order to return the oil 22 located and separated in the air oil separator 42 back into the housing 20, a riser 52 is provided which has a filter and check valve 54 at the exit of the holder 40 for the air oil separator 42 when it passes into the housing 20.

Stromabwärts des Filter- und Rückschlagventils 54 ist in einer Gehäusebohrung eine Düse 56 vorgesehen. Die Ölrückführleitung 58 führt zurück in etwa den mittleren Bereich der Schraube 16 oder der Schraube 18, um dieser wieder Öl 22 zuzuführen.A nozzle 56 is provided in a housing bore downstream of the filter and check valve 54. The oil return line 58 leads back approximately to the middle area of the screw 16 or the screw 18 in order to supply oil 22 again.

Im im montierten Zustand befindlichen Bodenbereich des Gehäuses 20 ist eine Ölablassschraube 59 vorgesehen. Über die Ölablassschraube 59 kann eine entsprechende Ölablauföffnung geöffnet werden, über die das Öl 22 abgelassen werden kann.An oil drain plug 59 is provided in the bottom area of the housing 20 in the assembled state. Via the oil drain screw 59, a corresponding oil drain opening are opened through which the oil 22 can be drained.

Im unteren Bereich des Gehäuses 20 ist auch der Ansatz 60 vorhanden, an dem der Ölfilter 62 befestigt wird. Über einen Ölfiltereinlasskanal 64, der im Gehäuse 20 angeordnet ist, wird das Öl 22 zunächst zu einem Thermostatventil 66 geleitet.In the lower area of the housing 20 there is also the extension 60 to which the oil filter 62 is attached. The oil 22 is first fed to a thermostatic valve 66 via an oil filter inlet channel 64 which is arranged in the housing 20.

Anstelle des Thermostatventils 66 kann eine Steuerungs- und/oder Regelungseinrichtung vorgesehen sein, mittels derer die Öltemperatur des im Gehäuse 20 befindlichen Öls 22 überwachbar und auf einen Sollwert einstellbar ist.Instead of the thermostat valve 66, a control and / or regulating device can be provided, by means of which the oil temperature of the oil 22 located in the housing 20 can be monitored and adjusted to a setpoint value.

Stromabwärts des Thermostatventils 66 ist sodann der Öleinlass des Ölfilters 62, der über eine zentrale Rückführleitung 68 das Öl 22 wieder zurück zur Schraube 18 oder zur Schraube 16, aber auch zum ölgeschmierten Lager 70 der Welle 14 führt. Im Bereich des Lagers 70 ist auch eine Düse 72 vorgesehen, die im Gehäuse 20 im Zusammenhang mit der Rückführleitung 68 vorgesehen ist.Downstream of the thermostatic valve 66 is the oil inlet of the oil filter 62, which leads the oil 22 back to the screw 18 or to the screw 16, but also to the oil-lubricated bearing 70 of the shaft 14 via a central return line 68. In the area of the bearing 70, a nozzle 72 is also provided, which is provided in the housing 20 in connection with the return line 68.

Der Kühler 74 ist am Ansatz 60 angeschlossen.The cooler 74 is connected to the extension 60.

Im oberen Bereich des Gehäuses 20 (bezogen auf den montierten Zustand) befindet sich ein Sicherheitsventil 76, über das ein zu großer Druck im Gehäuse 20 abgebaut werden kann.In the upper area of the housing 20 (in relation to the assembled state) there is a safety valve 76, by means of which excess pressure in the housing 20 can be reduced.

Vor dem Mindestdruckventil 50 befindet sich eine Bypassleitung 78, die zu einem Entlastungsventil 80 führt. Über dieses Entlastungsventil 80 das mittels einer Verbindung mit der Luftzuführung 32 angesteuert wird kann Luft in den Bereich des Lufteinlasses 28 zurückgeführt werden. In diesem Bereich kann ein nicht näher gezeigtes Entlüftungsventil und auch eine Düse (Durchmesserveringerung der zuführenden Leitung) vorgesehen sein.A bypass line 78, which leads to a relief valve 80, is located upstream of the minimum pressure valve 50. Air can be fed back into the area of the air inlet 28 via this relief valve 80, which is controlled by means of a connection to the air supply 32. A vent valve (not shown in more detail) and also a nozzle (diameter reduction of the supply line) can be provided in this area.

Darüber hinaus kann ungefähr auf Höhe der Leitung 34 in der Außenwand des Gehäuses 20 ein Öllevelsensor 82 vorgesehen sein. Dieser Öllevelsensor 82 kann beispielsweise ein optischer Sensor sein und derart beschaffen und eingerichtet, dass anhand des Sensorsignals erkannt werden kann, ob der Ölstand im Betrieb oberhalb des Öllevelsensors 82 ist oder ob der Öllevelsensor 82 frei liegt und hierdurch der Ölstand entsprechend gefallen ist.In addition, an oil level sensor 82 can be provided approximately at the level of the line 34 in the outer wall of the housing 20. This oil level sensor 82 can be, for example, an optical sensor and can be constructed and set up such that it can be recognized on the basis of the sensor signal whether the oil level is above the oil level sensor 82 during operation or whether the oil level sensor 82 is exposed and the oil level has fallen accordingly as a result.

Im Zusammenhang mit dieser Überwachung kann auch eine Alarmeinheit vorgesehen sein, die eine entsprechende Fehlermeldung oder Warnmeldung an den Nutzer des Systems ausgibt bzw. weiterleitet.In connection with this monitoring, an alarm unit can also be provided that outputs or forwards a corresponding error message or warning message to the user of the system.

Die Funktion des in Fig. 1 gezeigten Schraubenkompressors 10 ist dabei wie folgt:
Luft wird über den Lufteinlass 28 zugeführt und gelangt über das Rückschlagventil 30 zu den Schrauben 16, 18, wo die Luft komprimiert wird. Das komprimierte Luft-Öl-Gemisch, das mit einem Faktor zwischen 5- bis 16facher Komprimierung nach den Schrauben 16 und 18 durch die Auslassleitung 34 über das Steigrohr 36 aufsteigt, wird direkt auf den Temperaturfühler 38 geblasen.The function of the in Fig. 1 shown screw compressor 10 is as follows:
Air is supplied via the air inlet 28 and reaches the screws 16, 18 via the check valve 30, where the air is compressed. The compressed air-oil mixture, which rises with a factor of between 5 and 16 times compression after the screws 16 and 18 through the outlet line 34 via the riser pipe 36, is blown directly onto the temperature sensor 38.

Die Luft, die noch teilweise Ölpartikel trägt, wird sodann über den Halter 40 in den Luftölabscheider 42 geführt und gelangt, sofern der entsprechende Mindestdruck erreicht wird, in die Luftauslassleitung 51.The air, which still partially carries oil particles, is then guided via the holder 40 into the air-oil separator 42 and, if the corresponding minimum pressure is reached, reaches the air outlet line 51.

Das im Gehäuse 20 befindliche Öl 22 wird über den Ölfilter 62 und ggf. über den Wärmetauscher 74 auf Betriebstemperatur gehalten.The oil 22 located in the housing 20 is kept at operating temperature via the oil filter 62 and possibly via the heat exchanger 74.

Sofern keine Kühlung notwendig ist, wird der Wärmetauscher 74 nicht verwendet und ist auch nicht zugeschaltet.If no cooling is necessary, the heat exchanger 74 is not used and is also not switched on.

Die entsprechende Zuschaltung erfolgt über das Thermostatventil 68. Nach der Aufreinigung im Ölfilter 64 wird über die Leitung 68 Öl der Schraube 18 oder der Schraube 16, aber auch dem Lager 72 zugeführt. Die Schraube 16 oder die Schraube 18 wird über die Rückführleitung 52, 58 mit Öl 22 versorgt, hier erfolgt die Aufreinigung des Öls 22 im Luftölabscheider 42.The corresponding connection takes place via the thermostatic valve 68. After the purification in the oil filter 64, oil is fed to the screw 18 or the screw 16, but also to the bearing 72, via the line 68. The screw 16 or the screw 18 is supplied with oil 22 via the return line 52, 58; here the oil 22 is purified in the air-oil separator 42.

Über den nicht näher gezeigten Elektromotor, der sein Drehmoment über die Welle 14 auf die Schraube 16 überträgt, die wiederum mit der Welle 18 kämmt, werden die Schrauben 16 und 18 des Schraubenkompressors 10 angetrieben.The screws 16 and 18 of the screw compressor 10 are driven by the electric motor, not shown in detail, which transmits its torque via the shaft 14 to the screw 16, which in turn meshes with the shaft 18.

Über das nicht näher gezeigte Entlastungsventil 80 wird sichergestellt, dass im Bereich der Zuleitung 32 nicht der hohe Druck, der im Betriebszustand beispielsweise ausgangsseitig der Schrauben 16, 18 herrscht, eingesperrt werden kann, sondern dass insbesondere beim Anlaufen des Kompressors im Bereich der Zuleitung 32 stets ein niedriger Eingangsdruck, insbesondere Atmosphärendruck, besteht. Andernfalls würde mit einem Anlaufen des Kompressors zunächst ein sehr hoher Druck ausgangsseitig der Schrauben 16 und 18 entstehen, der den Antriebsmotor überlasten würde.The relief valve 80, not shown in detail, ensures that in the area of the supply line 32, the high pressure that prevails in the operating state, for example on the outlet side of the screws 16, 18, cannot be locked in, but that especially when the compressor starts up in the area of the supply line 32 there is a low inlet pressure, in particular atmospheric pressure. Otherwise, when the compressor starts up, a very high pressure would initially arise on the output side of the screws 16 and 18, which would overload the drive motor.

Fig. 2 zeigt in perspektivischer, schematischer Darstellung den Schraubenkompressor 10 gemäß Fig. 1 in einer Schnittdarstellung mit Blick auf das Innere des Gehäuses 20 des Schraubenkompressors 10. Fig. 2 shows the screw compressor 10 according to FIG Fig. 1 in a sectional view with a view of the interior of the housing 20 of the screw compressor 10.

Im Inneren des Gehäuses 20 ist ein Schwallblech 100 angeordnet, das im Wesentlichen auf der Höhe des oberen Levels des Ölsumpfes des Öles 22 befindlich ist. Dabei wird vom montierten Zustand und einer horizontalen Anordnung des oberen Levels des Ölsumpfes ausgegangen.A baffle plate 100 is arranged in the interior of the housing 20 and is located essentially at the level of the upper level of the oil sump of the oil 22. This is based on the assembled state and a horizontal arrangement of the upper level of the oil sump.

Das Gehäuse 20 weist einen Gehäusedeckel 20b und ein Rotorengehäuse 20a auf.The housing 20 has a housing cover 20b and a rotor housing 20a.

Im Gehäusedeckel 20b befindet sich ein Luftölabscheiderzulauf 102, der mit dem Luftölabscheider 42 verbunden ist.An air-oil separator inlet 102, which is connected to the air-oil separator 42, is located in the housing cover 20b.

Zwischen dem Gehäusedeckel 20b und dem Rotorengehäuse 20a ist eine Dichtung 104 vorgesehen, die umlaufend zwischen den Rändern vom Gehäusedeckel 20b und Rotorengehäuse 20a im montierten Zustand geführt und dichtend zwischen diesen eingespannt und verschraubt ist.A seal 104 is provided between the housing cover 20b and the rotor housing 20a, which is circumferentially guided between the edges of the housing cover 20b and rotor housing 20a in the assembled state and is clamped and screwed sealingly between them.

Hierzu weist die Dichtung 104 Schraubbolzendurchtrittsöffnungen 106 auf, durch die entsprechende Verschraubungen mittels Schraubbolzen hindurchgeführt werden können, so dass Dichtung 104, Gehäusedeckel 20b und Rotorengehäuse 20a miteinander verschraubt werden können bzw. im montierten Zustand miteinander verschraubt sind.For this purpose, the seal 104 has screw bolt through openings 106 through which corresponding screw connections are passed by means of screw bolts can, so that seal 104, housing cover 20b and rotor housing 20a can be screwed to one another or are screwed to one another in the assembled state.

Bezogen auf den montierten Zustand des Schraubenkompressors 10 ist die Dichtung 104 zwischen Gehäusedeckel 20b und Rotorengehäuse 20a angeordnet und ragt aus dem Ölsumpf des Öles 22 hervor.In relation to the assembled state of the screw compressor 10, the seal 104 is arranged between the housing cover 20b and the rotor housing 20a and protrudes from the oil sump of the oil 22.

Die Dichtung 104 ist als Dichtplatte ausgebildet und weist mehrere Durchtrittsöffnungen 108 auf.The seal 104 is designed as a sealing plate and has several through openings 108.

Die Durchtrittsöffnungen 108 sind kreisrund ausgebildet und regelmäßig versetzt zueinander nach Art eines Lochbleches im oberhalb des Ölsumpfes befindlichen Bereiches der Dichtung 104 angeordnet.The passage openings 108 are circular and are regularly offset from one another in the manner of a perforated plate in the area of the seal 104 located above the oil sump.

Die Dichtung 104 teilt das Gehäuseinnere asymmetrisch in wenigstens einen ersten Bereich B1, der im Wesentlichen die inneren Bereiche des Gehäusedeckels 20b betrifft, und einen zweiten Bereich B2, der im Wesentlichen das Innere des übrigen Gehäuses 20, also des Rotorengehäuses 20a betrifft. Der erste Bereich B1 ist dabei kleiner als der zweite Bereich B2.The seal 104 divides the interior of the housing asymmetrically into at least one first area B1, which essentially relates to the inner areas of the housing cover 20b, and a second area B2, which essentially relates to the interior of the rest of the housing 20, that is to say the rotor housing 20a. The first area B1 is smaller than the second area B2.

Der Luftölabscheiderzulauf 102 mündet in den ersten Bereich B1 und befindet sich in der Nähe der Durchtrittsöffnungen 108 der Dichtung 104.The air oil separator inlet 102 opens into the first region B1 and is located in the vicinity of the passage openings 108 of the seal 104.

Wie weiter aus Fig. 2 ersichtlich ist, ist die Dichtung 104 bezogen auf den montierten Zustand bei im Wesentlichen horizontaler Ausrichtung des Schraubenkompressors 10 und bei im Wesentlichen horizontaler Ausrichtung des Ölsumpfes des Öles 22 senkrecht angeordnet.How further from Fig. 2 As can be seen, the seal 104 is arranged vertically in relation to the assembled state when the screw compressor 10 is oriented essentially horizontally and the oil sump 22 is oriented essentially horizontally.

Darüber hinaus weist die Dichtung 104 auf Höhe des oberen Levels des Ölsumpfes des Öles 22 eine Durchtrittsöffnung 110 für das Schwallblech 100 auf.In addition, the seal 104 has a passage opening 110 for the baffle 100 at the level of the upper level of the oil sump of the oil 22.

Im in Fig. 2 gezeigten Ausführungsbeispiel weist das Schwallblech 100 mehrere Öldurchtrittsöffnungen auf, die als längliche Schlitze ausgebildet sind.Im in Fig. 2 The embodiment shown, the baffle plate 100 has a plurality of oil passage openings, which are designed as elongated slots.

Das Schwallblech 100 und die Dichtung 104 unterteilen das Innere des Schraubenkompressors 10 in mehrere miteinander verbundene Kompartimente K1, K2, K3 und K4.The baffle plate 100 and the seal 104 divide the interior of the screw compressor 10 into a plurality of interconnected compartments K1, K2, K3 and K4.

Dabei sind die Kompartimente K2 und K3 die Kompartimente K2 und K3, in denen sich der Ölsumpf des Öles 22 befindet. Das Kompartiment K1 befindet sich im Bereich B1 und das Kompartiment K4 befindet sich im Bereich B2.The compartments K2 and K3 are the compartments K2 and K3 in which the oil sump of the oil 22 is located. The compartment K1 is located in the area B1 and the compartment K4 is located in the area B2.

Die Dichtung 104 und das Schwallblech 100 sind ineinander gesteckt und kreuzartig zueinander angeordnet. Dabei sind Dichtung 104 und Schwallblech 100 im Wesentlichen senkrecht zueinander angeordnet.The seal 104 and the baffle plate 100 are plugged into one another and are arranged in a cross manner to one another. The seal 104 and baffle plate 100 are arranged essentially perpendicular to one another.

Die Funktion der Dichtung 104 und ihrer Durchtrittsöffnungen 108 lässt sich wie folgt beschreiben :
Im Betrieb werden die Schrauben 16 und 18 von Drucköl des Öles 22 aus dem Ölsumpf geschmiert, so dass oberhalb des oberen Levels des Ölsumpfes Öldämpfe, kleine Öltröpfchen oder Öl-Aerosole vorhanden sind. Weitere Ölbewegungen werden durch die Fahrbewegungen des Nutzfahrzeuges erzwungen, so dass mittels des Schwallbleches 100 und auch der Dichtung 104 die Bewegung des Öles 22 und die Bewegungsmöglichkeiten des Öles 22 eingeschränkt werden. Zugleich wird aber durch die Durchtrittsöffnungen 108 sowohl im Schwallblech 100 als auch in der Dichtung 104 erreicht, dass ausreichend Öl 22 in Form von kleinen Öltröpfchen, Öldämpfen oder Öl-Aerosolen in sämtliche Bereiche des Schraubenkompressors 10 gelangen kann.The function of the seal 104 and its passage openings 108 can be described as follows:
During operation, the screws 16 and 18 are lubricated by pressurized oil from the oil 22 from the oil sump, so that oil vapors, small oil droplets or oil aerosols are present above the upper level of the oil sump. Further oil movements are forced by the driving movements of the utility vehicle, so that the movement of the oil 22 and the movement possibilities of the oil 22 are restricted by means of the baffle 100 and also the seal 104. At the same time, however, the through openings 108 both in the baffle plate 100 and in the seal 104 ensure that sufficient oil 22 can reach all areas of the screw compressor 10 in the form of small oil droplets, oil vapors or oil aerosols.

Um den Öleintrag in den Luftölabscheider 42 zu verringern, wird der Öleintrag in den Luftölabscheiderzulauf 102 reduziert. Dies erfolgt durch die Durchtrittsöffnungen 108 der Dichtung 104, da aufgrund der lochplattenartigen Struktur der Dichtung 104 weniger Öl 22 zum Luftölabscheiderzulauf 102 gelangen kann. Dadurch wird der Öleintrag in den Luftölabscheider 42 verringert.In order to reduce the oil entry into the air-oil separator 42, the oil entry into the air-oil separator inlet 102 is reduced. This takes place through the passage openings 108 of the seal 104, since less oil 22 can reach the air-oil separator inlet 102 due to the perforated plate-like structure of the seal 104. As a result, the entry of oil into the air oil separator 42 is reduced.

Dies hat den Effekt, dass der Luftölabscheider 42 auf geringere Ölmengen ausgelegt werden kann, da bereits durch die Gestaltung der Dichtung 104 erhebliche Ölmengen zurückgehalten werden können und sich an den Rändern der Durchtrittsöffnungen 108 fangen und dort dann an der Wandung der Dichtung 104 wieder zurück in den Ölsumpf des Öles 22 fließen.This has the effect that the air-oil separator 42 can be designed for smaller oil quantities, since the design of the seal 104 can hold back considerable quantities of oil and catch on the edges of the passage openings 108 and then back into the wall of the seal 104 the oil sump of the oil 22 flow.

Die Anordnung von Dichtung 104 und Schwallblech 100 hat weiter die Funktion, dass auch horizontale Schwallbewegungen unterbunden werden können bzw. reduziert werden können.The arrangement of the seal 104 and baffle plate 100 also has the function that horizontal surge movements can also be prevented or reduced.

Schwallblech 100 und Dichtung 104 wirken somit als Blockade gegen horizontale Schwallbewegungen, insbesondere in Richtung des Luftölabscheiderzulaufs 102 und begrenzen damit den Öleintrag in den Luftölabscheider 42.Baffle plate 100 and seal 104 thus act as a blockade against horizontal surge movements, in particular in the direction of air-oil separator inlet 102, and thus limit the entry of oil into air-oil separator 42.

BEZUGSZEICHENLISTEREFERENCE LIST

1010
SchraubenkompressorScrew compressor
1212
BefestigungsflanschMounting flange
1414th
EingangswelleInput shaft
1616
SchraubenScrews
1818th
SchraubenScrews
2020th
Gehäusecasing
20a20a
Gehäusekorpus/RotorengehäuseHousing body / rotor housing
20b20b
GehäusedeckelHousing cover
2222nd
Öloil
2424
EinlassstutzenInlet port
2626th
LuftfilterAir filter
2828
LufteinlassAir inlet
3030th
VentileinsatzValve insert
3232
LuftzuführkanalAir supply duct
3434
LuftauslassrohrAir outlet pipe
3636
SteigleitungRiser
3838
TemperaturfühlerTemperature sensor
4040
Halter für einen LuftölabscheiderHolder for an air oil separator
4242
LuftölabscheiderAir oil separator
4444
Filtersieb bzw. bekannte Filter- bzw. ÖlabscheidevorrichtungenFilter sieve or known filter or oil separating devices
4646
LuftausgangsöffnungAir outlet opening
4848
Rückschlagventilcheck valve
5050
MindestdruckventilMinimum pressure valve
5151
LuftauslassAir outlet
5252
SteigleitungRiser
5454
Filter- und RückschlagventilFilter and check valve
5656
Düsejet
5858
ÖlrückführleitungOil return line
5959
ÖlablassschraubeOil drain plug
6060
Ansatzapproach
6262
ÖlfilterOil filter
6464
ÖlfiltereinlasskanalOil filter inlet duct
6666
ThermostatventilThermostatic valve
6868
RückführleitungReturn line
7070
Lagercamp
7272
Düsejet
7474
Kühler, WärmetauscherCooler, heat exchanger
7676
SicherheitsventilSafety valve
7878
BypassleitungBypass line
8080
EntlastungsventilRelief valve
8282
ÖllevelsensorOil level sensor
100100
SchwallblechBaffle plate
102102
LuftölabscheiderzulaufAir oil separator inlet
104104
Dichtungpoetry
106106
SchraubbolzendurchtrittsöffnungBolt through hole
108108
DurchtrittsöffnungenPassage openings
110110
DurchtrittsöffnungPassage opening
B1B1
erster Bereichfirst area
B2B2
zweiter Bereichsecond area
K1K1
KompartimentCompartment
K2K2
KompartimentCompartment
K3K3
KompartimentCompartment
K4K4
KompartimentCompartment

Claims (14)

  1. Screw-type compressor (10) for a utility vehicle having at least one housing (20) with at least a housing cover (20b) and with at least a rotor housing (20a), at least one baffle plate (100) and with at least one seal (104), wherein, in the assembled condition, an oil sump is present in the housing (20), wherein, again in the assembled condition, the seal (104) is arranged between the housing cover (20b) and the rotor housing (20a), and wherein, in the assembled condition, when the screw compressor (10) is orientated horizontally and the oil sump is orientated horizontally the baffle plate (100) is substantially parallel to the upper level of the oil sump, characterised in that the seal projects out of the oil sump and the seal at least partially separates the inside of the housing cover (20b) from the inside of the rotor housing (20a).
  2. Screw compressor (10) according to Claim 1,
    characterised in that
    the baffle plate (100) has at least one, in particular a plurality of oil passage openings.
  3. Screw compressor (10) according to Claims 1 or 2,
    characterised in that
    the baffle plate (100) and the seal (104) divide the inside of the screw compressor (10) into a number of interconnected compartments (K1, K2, K3, K4).
  4. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the seal (104) divides the inside of the housing asymmetrically into at least a first area (B1) and at least a second area (B2), such that the first area (B1) is smaller than the second area (B2).
  5. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the screw compressor (10) has an air-oil separator (42) and an air-oil separator inlet (102), wherein the air-oil separator inlet (102) opens into the inside of the housing of the screw compressor (10) and wherein passage openings of the seal (104) are arranged close to the air-oil separator inlet (102).
  6. Screw compressor (10) according to Claim 5.
    characterised in that
    the air-oil separator inlet (102) is formed in the housing cover (20b).
  7. Screw compressor (10) according to Claim 4 and one of Claims 5 or 6,
    characterised in that
    the air-oil separator inlet (102) opens into the first area of the inside of the housing.
  8. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    referring to the assembled condition, when the screw compressor (10) is orientated horizontally and the oil sump is orientated horizontally, the seal (104) is arranged vertically.
  9. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the passage openings are round, in particular circular.
  10. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    with the areas in the inside of the housing in the assembled condition, the seal (104) is in the form of a perforated plate, at least in part.
  11. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the seal (104) has a baffle plate passage opening.
  12. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the seal (104) and the baffle plate (100) are plugged into one another.
  13. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the seal (104) and the baffle plate (100) are arranged relative to one another to form a cross.
  14. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the seal (104) and the baffle plate (100) are arranged perpendicularly to one another.
EP17778213.3A 2016-09-21 2017-09-19 Screw-type compressor for a utility vehicle Active EP3516226B1 (en)

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DE102016011393.6A DE102016011393A1 (en) 2016-09-21 2016-09-21 Screw compressor for a commercial vehicle
PCT/EP2017/073550 WO2018054865A1 (en) 2016-09-21 2017-09-19 Screw-type compressor for a utility vehicle

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EP (1) EP3516226B1 (en)
JP (1) JP6733057B2 (en)
KR (1) KR102271219B1 (en)
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KR20030034807A (en) * 2001-10-27 2003-05-09 엘지전선 주식회사 An oil seperator of screw compressor

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JP6733057B2 (en) 2020-07-29
BR112019005072A2 (en) 2019-06-04
KR20190045945A (en) 2019-05-03
JP2019529800A (en) 2019-10-17
CN109906316B (en) 2020-09-15
EP3516226A1 (en) 2019-07-31
US11268513B2 (en) 2022-03-08
US20210010475A1 (en) 2021-01-14
KR102271219B1 (en) 2021-06-30
DE102016011393A1 (en) 2018-03-22
WO2018054865A1 (en) 2018-03-29
CN109906316A (en) 2019-06-18

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