EP3516224A1 - Compresseur à vis pour véhicule utilitaire - Google Patents

Compresseur à vis pour véhicule utilitaire

Info

Publication number
EP3516224A1
EP3516224A1 EP17777197.9A EP17777197A EP3516224A1 EP 3516224 A1 EP3516224 A1 EP 3516224A1 EP 17777197 A EP17777197 A EP 17777197A EP 3516224 A1 EP3516224 A1 EP 3516224A1
Authority
EP
European Patent Office
Prior art keywords
oil
housing
screw compressor
magnet
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17777197.9A
Other languages
German (de)
English (en)
Other versions
EP3516224B1 (fr
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 EP3516224A1 publication Critical patent/EP3516224A1/fr
Application granted granted Critical
Publication of EP3516224B1 publication Critical patent/EP3516224B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/026—Lubricant separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • 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
    • 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
    • F04C29/025—Lubrication; Lubricant separation using a lubricant pump
    • 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
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/19—Temperature
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/24—Level of liquid, e.g. lubricant or cooling liquid
    • 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
    • F04C2280/00—Arrangements for preventing or removing deposits or corrosion
    • F04C2280/02—Preventing solid deposits in pumps, e.g. in vacuum pumps with chemical vapour deposition [CVD] processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/12—Magnetic properties

Definitions

  • Screw compressor for a commercial vehicle The present invention relates to a screw compressor for a commercial vehicle.
  • Screw compressors 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.
  • the oil cooler is here
  • Heat exchanger having two separate circuits, wherein the first circuit for the hot liquid, so the compressor oil is provided and the second for the cooling liquid.
  • a coolant for example, air
  • Water mixtures can be used with an antifreeze or other oil.
  • This oil cooler must then be connected to the compressor oil circuit via pipes or hoses and the oil circuit must be secured against leakage.
  • a screw compressor for a commercial vehicle having the features of claim 1. Thereafter, it is provided that a screw compressor for a commercial vehicle provided with a housing, wherein in the ready and assembled state of the screw compressor in the housing an oil sump is provided and in the Oil sump is arranged a magnet.
  • the invention is based on the idea that in the present design mainly magnetic particles contaminate the oil and that such particles must be filtered out by an oil filter. To prevent clogging of an oil filter, it is useful to use an alternative and / or additional possibility of a particle trap. This is achieved by a magnet.
  • the magnet in the oil sump preferably at the lowest point in the oil sump, ensures that the particle number of magnetic particles in the oil is reliably reduced.
  • the oil filter can be made smaller or even eliminated entirely.
  • the screw compressor has no oil filter. As a result, the structure of the screw compressor is simplified because a component is eliminated and, moreover, less oil lines in the housing of the
  • Screw compressor or external oil lines around the screw compressor must be provided around. Also eliminates a wearing part of the screw compressor
  • the housing has a housing body and a housing cover, wherein the magnet is arranged in the housing body.
  • the arrangement in the housing body becomes a simple and reliable
  • Attachment but also allows mounting of the magnet. Even with a maintenance and revision of the screw compressor, the magnet is thus easily accessible and can be easily cleaned or replaced.
  • the housing has a housing body and a housing cover, wherein the magnet is arranged in the housing cover.
  • a baffle plate is arranged in the housing and that the magnet is in the ready and assembled state of
  • Screw compressor is arranged below the baffle plate in the oil
  • the baffle plate By the baffle plate is possible that movement of the screw compressor, especially during operation and when driving the commercial vehicle, the mobility of the oil in the housing limited and the effect of centrifugal forces and inertial forces is reduced.
  • the arrangement of the magnet in the ready and assembled state of the screw compressor below the baffle plate ensures that the magnet is substantially always lapped by the oil and thus can pursue its function as a particle trap.
  • the magnet can be designed as a substantially cylindrical disk. This allows a simple production, but at the same time also a comparatively large surface, on which particles can adhere.
  • the magnet can also have any other shape.
  • the magnet may be fixed in the housing by means of a spacer. This makes it possible that both the front and the back of the magnet can be lapped by the oil.
  • the spacer may have a bolt and / or a spacer.
  • the spacing element can be, for example, a spacer sleeve pushed onto a threaded bolt. The use of bolts and / or a spacer element as a spacer allows easy and reliable attachment of the magnet while ensuring the function that the magnet a certain distance from the housing inner wall or of the
  • Housing cover inner wall should have to ensure a complete flushing of the magnet.
  • Fig. 1 is a schematic sectional view through an inventive
  • Fig. 2 is a detailed perspective view of the housing cover of
  • 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 2 for mechanical attachment of the screw compressor 10 to an electric motor not shown here.
  • 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.
  • 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. Further provided in the interior of the air de-oiling element 42 is a corresponding filter screen or known filter and oil-separating devices 44, which are not specified in detail. In the central upper area, relative to the assembled and ready-to-use state (ie as shown in FIG. 1), the holder for the air de-oiling element 40 has a
  • the check valve 48 and the minimum pressure valve 50 may also be formed in a common, combined valve.
  • 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.
  • Oil drain plug 59 is provided. About the oil drain plug 59, a
  • Regulation means may 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 desired value. Downstream of the thermostatic valve 66 is then the oil inlet of the oil filter 62, the oil 22 via a central return line 68 back to the screw 18 or screw 16, but also to the oil-lubricated bearing 70 of the shaft 14 leads. In the region of the bearing 70, a nozzle 72 is provided, which is provided in the housing 20 in connection with the return line 68.
  • the cooler 74 is connected to the projection 60.
  • a safety valve 76 In the upper region of the housing 20 (relative to the mounted state) there is a safety valve 76, via which an excessive pressure in the housing 20 can be reduced.
  • connection with the air supply 32 is controlled, air can be returned to the region of the air inlet 28.
  • a vent valve not shown in detail and also a nozzle (diameter reduction of the feeding line) may be provided.
  • This oil level sensor 82 may be, for example, an optical sensor and arranged and set up so that it can be detected by the sensor signal, whether the oil level is above the oil level sensor 82 in operation or if the oil level sensor 82 is exposed and thereby the oil level has fallen 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 partly 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 located in the housing 20 is maintained at the operating temperature via the oil filter 62 and possibly via the heat exchanger 74.
  • the heat exchanger 74 is not used and is not switched on.
  • the corresponding connection is made via the thermostatic valve 68.
  • oil is supplied via the line 68 to the screw 18 or the screw 16, but also to the bearing 72.
  • the screw 16 or the screw 18 is supplied via the return line 52, 58 with oil 22, here is the purification of the oil 22 in the air de-oiling 42nd
  • FIG. 2 shows a perspective view of part of the screw compressor 10, namely the housing body 20 a of the housing 20.
  • a corresponding receptacle, the rotors housing 20b for the two screws 16 and 18, is provided in the housing body 20a.
  • Rotors housing 20 b a baffle plate 100 provided with oil passage slots 102. Below the baffle plate 100 is located in the assembled and operational state of the oil sump of the oil 22. At the substantially lowest point of the housing 20 there is provided in the oil sump of the oil 22 in the ready and assembled state, a magnet 104.
  • the magnet 104 is by means of a spacer 106, here from a
  • Bolt 108 and a spacer sleeve 110 is not shown in detail, attached to the housing body 20 a.
  • the screw compressor 10 has no oil filter 62 in the embodiment shown in FIG. This is omitted and is completely replaced by the magnet 104.
  • the magnet 104 is formed as a substantially cylindrical disc.
  • the magnet 104 is further completely surrounded by the oil 22 except for the small area on the housing body 20a where the spacer 106 passes through the magnet 104.
  • the housing cover of the screw compressor 10 is not shown in Fig. 2.
  • the function of the magnet 104 can be described as follows:
  • the floating in the oil 22 magnetic particles for example, by abrasion of intermeshing screws 16 and 18 or the bearings or other moving parts of the screw compressor 10 get into the oil 22, by the magnet 104, which acts here as a particle trap, from the oil 22nd filtered out and dressed.
  • the magnet 104 thus acts as a particle trap and thereby cleans the oil 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne un compresseur à vis (10) pour véhicule utilitaire comprenant un carter (20), un carter d'huile étant situé dans ledit carter (20) lorsque le compresseur à vis (10) est à l'état monté et prêt à fonctionner, et un aimant (104) étant disposé dans le carter d'huile.
EP17777197.9A 2016-09-21 2017-09-19 Compresseur à vis pour véhicule utilitaire Active EP3516224B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016011395.2A DE102016011395A1 (de) 2016-09-21 2016-09-21 Schraubenkompressor für ein Nutzfahrzeug
PCT/EP2017/073551 WO2018054866A1 (fr) 2016-09-21 2017-09-19 Compresseur à vis pour véhicule utilitaire

Publications (2)

Publication Number Publication Date
EP3516224A1 true EP3516224A1 (fr) 2019-07-31
EP3516224B1 EP3516224B1 (fr) 2020-08-19

Family

ID=59982347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17777197.9A Active EP3516224B1 (fr) 2016-09-21 2017-09-19 Compresseur à vis pour véhicule utilitaire

Country Status (7)

Country Link
US (1) US11994129B2 (fr)
EP (1) EP3516224B1 (fr)
JP (1) JP2019529801A (fr)
KR (1) KR20190049845A (fr)
CN (1) CN109937301B (fr)
DE (1) DE102016011395A1 (fr)
WO (1) WO2018054866A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3623630B1 (fr) * 2018-09-13 2020-07-29 Pfeiffer Vacuum Gmbh Pompe à vide

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Also Published As

Publication number Publication date
WO2018054866A1 (fr) 2018-03-29
US11994129B2 (en) 2024-05-28
CN109937301B (zh) 2021-05-28
EP3516224B1 (fr) 2020-08-19
DE102016011395A1 (de) 2018-03-22
BR112019005059A2 (pt) 2019-06-18
JP2019529801A (ja) 2019-10-17
KR20190049845A (ko) 2019-05-09
CN109937301A (zh) 2019-06-25
US20190211826A1 (en) 2019-07-11

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