EP3516234B1 - Screw compressor for a utility vehicle - Google Patents

Screw compressor for a utility vehicle Download PDF

Info

Publication number
EP3516234B1
EP3516234B1 EP17772361.6A EP17772361A EP3516234B1 EP 3516234 B1 EP3516234 B1 EP 3516234B1 EP 17772361 A EP17772361 A EP 17772361A EP 3516234 B1 EP3516234 B1 EP 3516234B1
Authority
EP
European Patent Office
Prior art keywords
oil
housing
seal
screw compressor
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
EP17772361.6A
Other languages
German (de)
French (fr)
Other versions
EP3516234A1 (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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Publication of EP3516234A1 publication Critical patent/EP3516234A1/en
Application granted granted Critical
Publication of EP3516234B1 publication Critical patent/EP3516234B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • 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
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • 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
    • 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
    • F04C29/028—Means for improving or restricting lubricant flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • 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
    • F04C2220/00—Application
    • F04C2220/40—Pumps with means for venting areas other than the working chamber, e.g. bearings, gear chambers, shaft seals
    • 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
    • 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
    • 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 utility vehicle with at least one housing, with at least one housing cover and at least one seal.
  • 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 or another oil can be used as the cooling liquid.
  • 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.
  • a screw compressor with the features of claim 1.
  • a screw compressor for a commercial vehicle is provided with at least one housing with at least one housing cover and with at least one rotor housing and with at least one seal, in the assembled state an oil sump is present in the housing, the seal being arranged between the housing cover and the rotor housing and protruding from the oil sump in relation to the assembled state, the seal being designed as a sealing plate and having several passage openings.
  • 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 cover and a rotor housing.
  • the invention is based on the basic idea that in an oil-filled screw compressor with an oil sump above the oil sump, small oil droplets, oil aerosols or an oil vapor are present and that parts of the oil get into certain areas of the housing as a result.
  • the design of the sealing plate the protrudes from the oil sump, achieves that although oil can still get into all areas of the housing inside the screw compressor, this displacement of oil is limited by small oil droplets, oil vapors or oil aerosols through the seal and the passage openings of the seal.
  • the seal provides a type of oil trap located inside the housing, where oil can only pass through the openings and, moreover, the small oil droplets and oil aerosols can accumulate and deposit on the sealing plate. From there they can then flow back into the oil sump.
  • the seal asymmetrically divides the interior of the housing into at least one first area and at least one second area, the first area being smaller than the second area. In this way, it can be achieved, for example, that certain areas that are to be supplied more strongly with small oil droplets and with oil aerosols or oil vapors are better reached and the first area, which is smaller than the second area, is less with small oil droplets and with 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.
  • 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 rotor housing and the housing cover 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 interior of the housing.
  • 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 simple manufacture and manufacture of the seal. However, any other shape of the passage 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 area 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. A uniform arrangement of the holes in the areas in which the seal is designed as a perforated plate makes it possible to provide a good area of passage openings without weakening the seal as a whole.
  • the seal can also have a baffle passage opening.
  • the baffle plate passage opening is designed in such a way that, in the assembled state, it is located approximately at the level of the surface of the oil sump.
  • the baffle plate and the seal can be arranged essentially perpendicular to one another. The formation of the baffle passage opening enables 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 lower-lying 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 cover and rotor housing are screwed together. This enables a simple, safe and reliable assembly of the seal between the housing cover and the rotor housing.
  • 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 in such a way 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 outlet 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 42 has in the assembled state in the area facing the floor (as also in FIG Fig. 1 shown) the air oil separator 42.
  • the holder 40 for the air oil separator 42 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. A corresponding oil drain opening through which the oil 22 can be drained can be opened via the oil drain screw 59.
  • 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 target 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, via which an excessive 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, for example, be an optical sensor and can be designed and set up in such a way that the sensor signal can be used to identify 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 which 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-fold compression according to 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, passes into 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; the oil 22 is purified here in the air-oil separator 42.
  • the screws 16 and 18 of the screw compressor 10 are driven via 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 in the area of the supply line 32, especially when the compressor starts up, always a low inlet pressure, especially atmospheric pressure, exists. 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 in a perspective, schematic representation 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. It 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 the corresponding screw connections can be passed by means of screw bolts, so that the seal 104, housing cover 20b and rotor housing 20a can be screwed together or are screwed together 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 a plurality of passage 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 rotor housing, housing cover 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 installed state when the screw compressor 10 is oriented essentially horizontally and the oil sump of the oil 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 function of the seal 104 and its passage openings 108 can be described as follows: In operation, the screws 16 and 18 are lubricated by pressurized oil from the oil 22 from the oil sump, so that oil vapors are present above the upper level of the oil sump. Further movements of the oil are forced by the driving movements of the utility vehicle, so that the movement of the oil 22 and the possibilities of movement of the oil 22 are restricted by means of the baffle plate 100 and also the seal 104. At the same time, however, through the passage openings 108 both in the baffle plate 100 as well as in the seal 104 achieves that sufficient oil 22 in the form of oil vapors, oil aerosols or small droplets can reach all areas of the screw compressor 10.
  • the entry of oil 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.

Description

Die vorliegende Erfindung betrifft einen Schraubenkompressor für ein Nutzfahrzeug mit wenigstens einem Gehäuse, mit wenigstens einem Gehäusedeckel und wenigstens einer Dichtung.The present invention relates to a screw compressor for a utility vehicle with at least one housing, with at least one housing cover and at least one seal.

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 or another oil can be used as the cooling liquid.

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 US 4,478,054 ist bereits ein Schraubenkompressor bekannt mit einem verbesserten Ölmanagement.From the U.S. 4,478,054 a screw compressor is already known with improved oil management.

Aus der US 6,237,362 B1 ist weiter ein Kompressor mit einem internen Ölabscheider und einer Ölabscheiderplatte für Kühlschränke bekannt.From the US 6,237,362 B1 a compressor with an internal oil separator and an oil separator plate for refrigerators is also known.

Es ist die Aufgabe der vorliegenden Erfindung, einen Schraubenkompressor für Nutzfahrzeuge der eingangs genannten Art in vorteilhafter Weise weiterzubilden, insbesondere dahingehend, dass das Entfernen von Öl aus der komprimierten Luft verbessert und vereinfacht werden kann.It is the object of the present invention to advantageously develop a screw compressor for commercial vehicles of the type mentioned at the beginning, 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 mit den Merkmalen des Anspruchs 1. Danach ist vorgesehen, dass ein Schraubenkompressor für ein Nutzfahrzeug mit wenigstens einem Gehäuse mit wenigstens einem Gehäusedeckel und mit wenigstens einem Rotorengehäuse 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 Gehäusedeckel und Rotorengehäuse angeordnet ist und aus dem Ölsumpf herausragt, wobei die Dichtung als Dichtplatte ausgebildet ist und mehrere Durchtrittsöffnungen aufweist.This object is achieved according to the invention by a screw compressor with the features of claim 1. According to this, it is provided that a screw compressor for a commercial vehicle is provided with at least one housing with at least one housing cover and with at least one rotor housing and with at least one seal, in the assembled state an oil sump is present in the housing, the seal being arranged between the housing cover and the rotor housing and protruding from the oil sump in relation to the assembled state, the seal being designed as a sealing plate and having several passage openings.

Das Gehäuse kann zweiteilig oder mehrteilig ausgebildet sein. Die Mehrteiligkeit wird insbesondere dadurch hergestellt, dass das Gehäuse aus einem Gehäusedeckel 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 cover and a rotor housing.

Die Erfindung basiert auf dem Grundgedanken, dass bei einem ölgefüllten Schraubenkompressor mit einem Ölsumpf oberhalb des Ölsumpfes kleine Öltröpchen, Öl-Aerosole oder ein Öldampf vorhanden ist und hierdurch Teile des Öls in bestimmte Bereiche des Gehäuses gelangen. Um das Entfernen von Öl aus der komprimierten Luft zu verbessern und zu vereinfachen, wird durch die Ausbildung der Dichtplatte, die aus dem Ölsumpf herausragt, erreicht, dass zwar weiterhin Öl in sämtliche Bereiche des Gehäuses im Inneren des Schraubenkompressors gelangen kann, jedoch diese Verlagerung von Öl durch kleine Öltröpfchen, Öldämpfe oder Öl-Aerosole durch die Dichtung und die Durchtrittsöffnungen der Dichtung begrenzt wird. Mit anderen Worten wird durch die Dichtung eine Art Ölfänger bereitgestellt, der sich im Inneren des Gehäuses befindet, an dem ein Öldurchtritt nur noch durch die Durchtrittsöffnungen ermöglicht ist und sich im Übrigen die kleinen Öltröpfchen und Öl-Aerosole kumulieren und an der Dichtplatte abscheiden können. Von dort können sie dann wieder in den Ölsumpf zurückfließen.The invention is based on the basic idea that in an oil-filled screw compressor with an oil sump above the oil sump, small oil droplets, oil aerosols or an oil vapor are present and that parts of the oil get into certain areas of the housing as a result. In order to improve and simplify the removal of oil from the compressed air, the design of the sealing plate, the protrudes from the oil sump, achieves that although oil can still get into all areas of the housing inside the screw compressor, this displacement of oil is limited by small oil droplets, oil vapors or oil aerosols through the seal and the passage openings of the seal. In other words, the seal provides a type of oil trap located inside the housing, where oil can only pass through the openings and, moreover, the small oil droplets and oil aerosols can accumulate and deposit on the sealing plate. From there they can then flow back into the oil sump.

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 und mit 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 und mit Öl-Aerosolen bzw. Öldämpfen versorgt wird.Furthermore, it can be provided that the seal asymmetrically divides the interior of the housing into at least one first area and at least one second area, the first area being smaller than the second area. In this way, it can be achieved, for example, that certain areas that are to be supplied more strongly with small oil droplets and with oil aerosols or oil vapors are better reached and the first area, which is smaller than the second area, is less with small oil droplets and with 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 becomes 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 Rotorengehäuse und Gehäusedeckel 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 rotor housing and the housing cover in the assembled state, can also be adjusted in a comparatively simple manner. In particular, can it can be provided that the air oil separator inlet opens into the first area of the interior of the housing. 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 Durchtrittsöffnungen 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 simple manufacture and manufacture of the seal. However, any other shape of the passage 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 Bereich 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 area 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. A uniform arrangement of the holes in the areas in which the seal is designed as a perforated plate makes it possible to provide a good area of passage openings 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 passage opening. In particular, it is conceivable that the baffle plate passage opening is designed in such a way that, in the assembled state, it is located approximately at the level of the surface of the oil sump. The baffle plate and the seal can be arranged essentially perpendicular to one another. The formation of the baffle passage opening enables 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 lower-lying 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, Gehäusedeckel und Rotorengehäuse miteinander verschraubt werden. Hierdurch wird eine einfache, sichere und zuverlässige Montage der Dichtung zwischen Gehäusedeckel 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 cover and rotor housing are screwed together. This enables a simple, safe and reliable assembly of the seal between the housing cover and the rotor housing.

Weitere Einzelheiten und Vorteile der Erfindung sollen nun anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher beschrieben werden.Further details and advantages of the invention will now be described in more detail with reference to an 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 housing 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 is transmitted from the electric motor 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 in such a way 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 outlet 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 42 weist im montierten Zustand im dem Boden zugewandten Bereich (wie auch in Fig. 1 gezeigt) den Luftölabscheider 42 auf.The holder 40 for the air oil separator 42 has in the assembled state 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 40 für den Luftölabscheider 42 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 40 for the air oil separator 42 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. A corresponding oil drain opening through which the oil 22 can be drained can be opened via the oil drain screw 59.

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 target 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, via which an excessive 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 Ollevelsensor 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, for example, be an optical sensor and can be designed and set up in such a way that the sensor signal can be used to identify 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 which 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-fold compression according to 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, passes into 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; the oil 22 is purified here 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 via 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 in the area of the supply line 32, especially when the compressor starts up, always a low inlet pressure, especially atmospheric pressure, exists. 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 in a perspective, schematic representation 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. It 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 the corresponding screw connections can be passed by means of screw bolts, so that the seal 104, housing cover 20b and rotor housing 20a can be screwed together or are screwed together 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 a plurality of passage 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 Gehäusedeckel 20b betrifft, und einen zweiten Bereich B2, der im Wesentlichen das Innere des Rotorengehäuses Gehäusedeckel20a 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 rotor housing, housing cover 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 installed state when the screw compressor 10 is oriented essentially horizontally and the oil sump of the oil 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.

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 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 Öldämpfen, Öl-Aerosolen oder kleinen Tröpfchen in sämtliche Bereiche des Schraubenkompressors 10 gelangen kann.The function of the seal 104 and its passage openings 108 can be described as follows:
In operation, the screws 16 and 18 are lubricated by pressurized oil from the oil 22 from the oil sump, so that oil vapors are present above the upper level of the oil sump. Further movements of the oil are forced by the driving movements of the utility vehicle, so that the movement of the oil 22 and the possibilities of movement of the oil 22 are restricted by means of the baffle plate 100 and also the seal 104. At the same time, however, through the passage openings 108 both in the baffle plate 100 as well as in the seal 104 achieves that sufficient oil 22 in the form of oil vapors, oil aerosols or small droplets can reach all areas of the screw compressor 10.

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 entry of oil into the air-oil separator 42, the entry of oil 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.

BEZUGSZEICHENLISTEREFERENCE LIST

1010
SchraubenkompressorScrew compressor
1212th
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 separation 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
Lagerwarehouse
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

Claims (10)

  1. Screw compressor (10) for a utility vehicle, having at least one housing (20) with at least one housing cover (20b) and with at least one rotor housing (20a) and with at least one seal (104), wherein in the assembled condition an oil sump is present in the housing (20) and wherein, referring to the assembled condition, the seal (104) is arranged between the housing cover (20b) and the rotor housing (20a) and projects out of the oil sump,
    characterised in that
    the seal (104) is in the form of a sealing plate and has a plurality of through-going openings (108, 110), wherein the seal (104) is configured in such manner that it provides a kind of oil catcher located inside the housing, at which oil can only pass through the said through-going openings and oil droplets and oil aerosols accumulate and can precipitate onto the sealing plate.
  2. Screw compressor (10) according to Claim 1,
    characterised in that
    the seal (104) divides the inside of the housing asymmetrically into at least one first part (B1) and at least one second part (B2), the first part (B1) being smaller than the second part (B2).
  3. Screw compressor (10) according to Claims 1 or 2,
    characterised in that
    the screw compressor (10) comprises 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 the through-going openings (108, 110) of the seal (104) are arranged close to the air/oil separator inlet (102).
  4. Screw compressor (10) according to Claim 3,
    characterised in that
    the air/oil separator inlet (102) is formed in the housing cover (20b).
  5. Screw compressor (10) according to Claim 2 and either of Claims 3 or 4,
    characterised in that
    the air/oil separator inlet (102) opens into the first part (B1) of the inside of the housing.
  6. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    referring to the assembled condition, if the screw compressor (10) is orientated essentially horizontally and the oil sump is orientated essentially horizontally, the seal (104) is positioned essentially vertically.
  7. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the through-going openings (108) are essentially round, in particular circular.
  8. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the seal (104) is in the form of a perforated plate, at least in that part of it which is inside the interior of the housing in the assembled condition.
  9. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the seal (104) has a baffle plate passage opening.
  10. Screw compressor (10) according to any of the preceding claims,
    characterised in that
    the seal (104) has screw-bolt passage openings (106) which are provided for the passage of screw-bolts by means of which the seal (104), the housing cover (20b) and the rotor housing (20a) are screwed to one another.
EP17772361.6A 2016-09-21 2017-09-19 Screw compressor for a utility vehicle Active EP3516234B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016011394.4A DE102016011394A1 (en) 2016-09-21 2016-09-21 Screw compressor for a commercial vehicle
PCT/EP2017/073546 WO2018054862A1 (en) 2016-09-21 2017-09-19 Screw compressor for a utility vehicle

Publications (2)

Publication Number Publication Date
EP3516234A1 EP3516234A1 (en) 2019-07-31
EP3516234B1 true EP3516234B1 (en) 2021-07-07

Family

ID=59966726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17772361.6A Active EP3516234B1 (en) 2016-09-21 2017-09-19 Screw compressor for a utility vehicle

Country Status (8)

Country Link
US (1) US11359630B2 (en)
EP (1) EP3516234B1 (en)
JP (1) JP6738494B2 (en)
KR (1) KR102228032B1 (en)
CN (1) CN109906317B (en)
BR (1) BR112019005068A2 (en)
DE (1) DE102016011394A1 (en)
WO (1) WO2018054862A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11085448B2 (en) * 2017-04-21 2021-08-10 Atlas Copco Airpower, Naamloze Vennootschap Oil circuit, oil-free compressor provided with such oil circuit and a method to control lubrication and/or cooling of such oil-free compressor via such oil circuit
BE1026195B1 (en) 2018-04-11 2019-11-12 Atlas Copco Airpower Naamloze Vennootschap Liquid injected compressor device
US11767837B2 (en) * 2019-11-14 2023-09-26 Vanair Manufacturing, Inc. Compressor control systems and air compressor systems and vehicles equipped therewith

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776668A (en) 1972-02-18 1973-12-04 Borg Warner Oil separator for refrigeration compressor
US4478054A (en) 1983-07-12 1984-10-23 Dunham-Bush, Inc. Helical screw rotary compressor for air conditioning system having improved oil management
US4780061A (en) 1987-08-06 1988-10-25 American Standard Inc. Screw compressor with integral oil cooling
JPH04279786A (en) 1991-03-06 1992-10-05 Toyota Autom Loom Works Ltd Scroll type compressor
US5246357A (en) 1992-07-27 1993-09-21 Westinghouse Electric Corp. Screw compressor with oil-gas separation means
IT1309299B1 (en) * 1999-06-23 2002-01-22 Samputensili Spa SCREW ROTARY COMPRESSOR FOR REFRIGERANT GAS TO BE USED IN A SMALL POWER CONDITIONING OR REFRIGERATION SYSTEM.
DE19963172A1 (en) 1999-12-27 2001-06-28 Leybold Vakuum Gmbh Screw-type vacuum pump has shaft-mounted rotors each with central hollow chamber in which are located built-in components rotating with rotor and forming relatively narrow annular gap through which flows cooling medium
KR100318418B1 (en) 1999-12-30 2001-12-22 신영주 Oil separator embeded in compressor
JP2003269356A (en) 2002-03-18 2003-09-25 Sanyo Electric Co Ltd Horizontal type rotary compressor
US7234926B2 (en) * 2004-10-15 2007-06-26 Ingersoll-Rand Company Air compressor assembly
US7891955B2 (en) * 2007-02-22 2011-02-22 Vilter Manufacturing Llc Compressor having a dual slide valve assembly
EP2538118B1 (en) 2011-06-20 2015-02-25 Turner Powertrain Systems Limited Gearbox split sump and lubricant flow control method
CN103410729B (en) 2013-08-26 2015-07-01 天津商业大学 Horizontal fully-closed two-stage screw refrigeration compressor
CN105443742B (en) 2016-01-26 2017-09-05 安徽江淮汽车集团股份有限公司 A kind of longitudinal speed changer

Also Published As

Publication number Publication date
JP2019529799A (en) 2019-10-17
US11359630B2 (en) 2022-06-14
JP6738494B2 (en) 2020-08-12
BR112019005068A2 (en) 2019-06-04
CN109906317A (en) 2019-06-18
EP3516234A1 (en) 2019-07-31
KR102228032B1 (en) 2021-03-15
WO2018054862A1 (en) 2018-03-29
US20190390673A1 (en) 2019-12-26
CN109906317B (en) 2020-12-08
DE102016011394A1 (en) 2018-03-22
KR20190045937A (en) 2019-05-03

Similar Documents

Publication Publication Date Title
EP3516234B1 (en) Screw compressor for a utility vehicle
EP3516221B1 (en) Screw compressor system for a utility vehicle
EP3516172B1 (en) Assembly of screws for a screw compressor for a utility vehicle
DE102016011507A1 (en) Screw compressor system for a commercial vehicle
DE102016011503A1 (en) System for a commercial vehicle comprising a screw compressor and an electric motor
EP3516224B1 (en) Screw compressor for a utility vehicle
EP3516226B1 (en) Screw-type compressor for a utility vehicle
EP3516227A1 (en) System for an utility vehicle comprising a screw compressor and an electric motor
EP3516171A1 (en) Screw compressor for a utility vehicle
EP3516231B1 (en) Screw compressor for a utility vehicle
EP3516236B1 (en) System for a utility vehicle comprising a compressor and an electric motor
WO2018054883A1 (en) Screw compressor for a utility vehicle
DE102016011508A1 (en) Screw compressor system for a commercial vehicle
EP3516222A1 (en) Screw compressor for a utility vehicle
EP3516220A1 (en) Arrangement for a screw compressor of a utility vehicle
EP3516229B1 (en) Screw compressor for a utility vehicle
DE102016011506A1 (en) Screw compressor for a commercial vehicle
WO2023213558A1 (en) Liquid separation device for a compressor system and compressor system having such a liquid separation device
EP3516232A1 (en) Screw compressor system for a utility vehicle

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190423

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20210216

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1408838

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210715

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502017010867

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20210707

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211108

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211007

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211007

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20211008

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502017010867

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

26N No opposition filed

Effective date: 20220408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210919

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210919

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210930

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230508

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210707

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20170919

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230921

Year of fee payment: 7

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1408838

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220919

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20230921

Year of fee payment: 7

Ref country code: FR

Payment date: 20230918

Year of fee payment: 7

Ref country code: DE

Payment date: 20230919

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220919