Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
  • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
  • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
  • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
  • B60T13/26—Compressed-air systems
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
  • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
  • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
• • 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
  • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
  • F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
• • 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
  • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
  • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
  • F04C28/26—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
• • 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
  • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
  • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston 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
  • 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
  • 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

Definitions

• the present invention relates to a screw compressor system for a commercial vehicle having at least one screw compressor with at least one control and / or regulating unit for drive control and / or regulation of the vehicle
• Screw compressor for commercial vehicles are already known from the prior art. Such screw compressors are used to provide the necessary compressed air for, for example, the braking system of the commercial vehicle.
• Screw compressors provides that for lubrication of the screws
• the oil is separated from the compressed air in an oil separation device and from there e.g. returned to the integrated oil reservoir or screws of the screw compressor.
• Screw compressor stopped (above a certain cut-off pressure).
• Air treatment device has this a minimum pressure valve. During regeneration, there is usually a rapid pressure drop in the
• Air treatment device until the closing pressure of the minimum pressure valve is reached.
• the pressure differential between the screw compressor and the air treatment unit temporarily causes oil from the oil separator to accidentally enter the oil separator
• Air treatment device passes. Another unwanted effect of the rapid pressure reduction is a foaming of the oil contained in the screw compressor, whereby damage can be caused in particular by lack of lubrication on exposed components of the screw compressor such as bearings or screws.
• a generic screw compressor is already known, for example, from DE 10 2004 060417 [34.
• Screw compressor simplified and can be configured reliably.
• Screw compressor system for a commercial vehicle with at least one
• Screw compressor and with at least one control and / or
• Control unit for drive control and / or regulation of the
• Screw compressor is provided, wherein the screw compressor at least one air outlet with at least one minimum pressure valve for controlling the
• Screw compressor for a predetermined period of time is lowered, so that a closing of the minimum pressure valve is made possible.
• the invention is based on the basic idea, the regeneration of downstream pneumatic elements (eg the air treatment device) only after a after a stop of the drive of the screw compressor, so that the pressure in the screw compressor slowly over the
• Relief valve has dropped such that foaming of the oil or leakage of oil through the air outlet is reliably prevented. This is achieved by leaving the relief valve open until the pressure in the
• Screw compressor has dropped so much that the minimum pressure valve due
• Screw compressor oil is introduced from the screw compressor into the air outlet inside and thus leads to contamination of downstream or connected to the screw compressor elements. In addition, it may also come to such an exit to an oil leakage from the commercial vehicle systems in the area, which should be avoided.
• Relief valve is achieved that in any case the pressure in
• Screw compressor may drop below the minimum pressure at which the
• Minimum pressure valve closes. This reliably prevents the escape of oil into the air outlet.
• control and / or regulating unit is part of the screw compressor.
• a compact structure is formed and it is not necessary to have access to external components.
• control and / or regulating unit is part of an air treatment device of the commercial vehicle.
• control and / or regulating unit is part of an air treatment device of the commercial vehicle.
• control and / or regulating unit is part of an air treatment device of the commercial vehicle.
• a corresponding control available, which can be easily shared.
• control and / or regulating unit is part of an engine or vehicle control of the commercial vehicle. Again, it would be possible to access an already existing component of the commercial vehicle. In principle, however, it is also conceivable that the control and / or regulating unit is designed as a separate control and / or regulating unit. This allows, for example, a simple installation and also a simple exchange or
• control and / or regulating unit is part of a drive of the screw compressor. In this case, it would also be possible to rely on the already provided by the drive control and / or
• the predetermined period of time is at least about 10 seconds, in particular at least about 15 seconds. Such a period is sufficient in the conventional vent valves to ensure a safe drop in the
• Minimum pressure valve would open or a pressure level at which the minimum pressure valve transferred from the open position to a closed position.
• the screw compressor system at least one
• the HeilauslassverInstitutventil is part of the screw compressor. Due to the integrated arrangement of the
• Air outlet shut-off valve e.g. In the housing of the screw compressor, a particularly compact design can be realized.
• the LuftauslassverInstitutventil is part of the air treatment device.
• the air outlet valve in the air conditioning device be integrated, which also leads to a particularly compact design and functional integration.
• Air outlet valve as a combined strictlyventil- and / or
• Air outlet valve unit are formed. This achieves a compact design. Overall, space can thus be saved, whereby the screw compressor system can be designed to be smaller overall construction. In addition, it can be provided that the minimum pressure valve below a voltage applied to the minimum pressure valve of about half to three quarters of
• Working pressure of the screw compressor closes. Due to the opening of the minimum pressure valve at half to three quarters of the working pressure, in particular during the initial pressure build-up, the oil can first be pressurized. As a result, first of all, reliable lubrication can take place during the start-up phase of the screw compressor until the minimum pressure valve is opened independently of the pressure of downstream pneumatic elements.
• Fig. 1 is a schematic sectional view through an inventive
• Fig. 2 is a schematic drawing of the screw compressor system according to the present invention.
• Fig. 1 shows a schematic sectional view of a screw compressor 10 in the sense of an embodiment of the present invention.
• the screw compressor 10 has a mounting flange 12 for mechanical attachment of the screw compressor 10 to a drive not shown here in detail in the form of an electric motor. Shown, however, is the input shaft 14, via which the torque from the electric motor to one of the two screws 16 and 18, namely the screw 16 is transmitted.
• 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 housed.
• the housing 20 is filled with oil 22. Air inlet side is on the housing 20 of the screw compressor 10 a
• Inlet port 24 is provided.
• the inlet nozzle 24 is designed such that an air filter 26 is arranged on it.
• an air inlet 28 is provided radially on the air inlet pipe 24.
• a spring-loaded valve core 30 is provided, designed here as an axial seal.
• This valve insert 30 serves as a check valve.
• an air supply channel 32 Downstream of the valve core 30, an air supply channel 32 is provided, which supplies the air to the two screws 16, 18.
• an air outlet pipe 34 is provided with a riser 36.
• a temperature sensor 38 is provided, by means of which the oil temperature can be monitored. Furthermore, a holder 40 for an air de-oiling element 42 is provided in the air outlet area.
• the holder 40 for the air de-oiling element has in the assembled state in the area facing the bottom (as shown in Fig. 1), the air de-oiling element 42.
• the holder for the air de-oiling element 40 has a
• Air outlet opening 46 which lead to a HeilauslassverInstitutventil 48 and a minimum pressure valve 50. According to this embodiment is thus the
• Air outlet valve 48 Part of the screw compressor 10.
• Air treatment device 120 be.
• the air outlet closure valve 48 need not necessarily be part of the screw compressor 10 or the air conditioning device 120. Rather, it is generally conceivable that the screw compressor system 100 is the
• Air outlet closure valve 48 has. Thus, it can be decided depending on the application, where the Heilauslassver gleichventil 48 within the
• Screw compressor system 100 is to be arranged.
• the HeilauslassverInstitutventil 48 and the minimum pressure valve 50 may also be formed in a common, combined valve. Following the Heilauslassver gleichventils 48 of the air outlet 51 is provided.
• the air outlet 51 is connected to correspondingly known compressed air consumers in the rule.
• a riser 52 is provided which has the outlet of the holder 40 for the air de-oiling element 42 when passing into the housing 20 a filter and check valve 54.
• a nozzle 56 Downstream of the filter and check valve 54, a nozzle 56 is provided in a housing bore.
• the oil return line 58 leads back approximately in the middle region of the screw 16 or the screw 18 to supply oil 22 again.
• an oil drain plug 59 is provided within the assembled state of the bottom portion of the housing 20, an oil drain plug 59 is provided. About the oil drain plug 59, a corresponding oil drain opening can be opened, via which the oil 22 can be drained.
• Regulation means may be provided by means of which the ⁇ ttemperatur of the oil 22 located in the housing 22 can be monitored and adjusted to a desired value.
• Relief valve 80 which is controlled by means of a connection to the air supply 32, air can be returned to the region of the air inlet 28.
• an oil level sensor 82 may be provided.
• This oil level sensor 82 may, for example, be an optical sensor and designed and set up so that it can be determined from the sensor signal whether the oil level is above the oil level sensor 82 during operation or if the oil level sensor 82 is free and the oil level has dropped accordingly.
• an alarm unit can also be provided which outputs or forwards an appropriate error message or warning message to the user of the system.
• the function of the screw compressor 10 shown in FIG. 1 is as follows:
• Air is supplied via the air inlet 28 and passes through the check valve 30 to the screws 16, 18, where the air is compressed.
• the compressed air-oil mixture which rises by a factor of between 5 and 16 times compression after the screws 16 and 18 through the outlet conduit 34 via the riser 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 de-oiling element 42 and, provided the corresponding minimum pressure is reached, enters the air outlet line 51.
• the oil 22 in the housing 20 is conveyed via the oil filter 62 and possibly kept at operating temperature via the heat exchanger 74.
• the heat exchanger 74 is not used and is not switched on.
• the relief valve 80 has the task of lowering the pressure exerted on the output side with respect to the screws 16, 18 via the bypass line 78 until the minimum pressure valve 50 (at approximately one half to three quarters of the working pressure ) for sure closes.
• the least! jerk valve (50) serves to control the working pressure at the air outlet (51).
• Air treatment device 120 could arrive.
• Fig. 2 shows a schematic representation of an inventive
• Screw compressor system 100 with the screw compressor 10 shown in FIG. 1, the air outlet 51, a compressed air line 110 connected to the air outlet 51 and an air conditioning device (EAC) 120.
• EAC air conditioning device
• control and regulation unit 130 is provided.
• control and regulation unit 130 is here as part of the
• Screw compressor 10 is formed.
• Control unit 130 part of the drive of the screw compressor 10, part of the air conditioning device 120, part of the engine control of the commercial vehicle, part of the vehicle control of the commercial vehicle or as a separate control and regulation unit 130 is formed
• the screw compressor 10 is turned off by means of the control unit 130 so that opening the relief valve 80 lowers the working pressure within the screw compressor 10 for a predetermined period of time to allow closure of the minimum pressure valve (50).
• This time span is about 15 seconds in the example shown. But it can for example be in a range between 10 and 15 seconds or even more.
• the minimum pressure valve 50 and the Heilauslassver gleichventil 48 as a combined technically horrventil- and
• Air outlet valve unit are formed.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Transportation (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Applications Or Details Of Rotary Compressors (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=59914466

Family Applications (1)

Country Status (7)

Family Cites Families (14)

• 2016
  • 2016-09-21 DE DE102016011439.8A patent/DE102016011439A1/de not_active Ceased
• 2017
  • 2017-09-19 CN CN201780058096.9A patent/CN109790840A/zh active Pending
  • 2017-09-19 JP JP2019536665A patent/JP2019529794A/ja active Pending
  • 2017-09-19 EP EP17769062.5A patent/EP3516232A1/de not_active Withdrawn
  • 2017-09-19 BR BR112019005063A patent/BR112019005063A2/pt not_active IP Right Cessation
  • 2017-09-19 KR KR1020197010170A patent/KR20190044682A/ko not_active Application Discontinuation
  • 2017-09-19 WO PCT/EP2017/073538 patent/WO2018054856A1/de unknown

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