EP3721090B1 - Auslasslamellenventil - Google Patents

Auslasslamellenventil Download PDF

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Publication number
EP3721090B1
EP3721090B1 EP18833396.7A EP18833396A EP3721090B1 EP 3721090 B1 EP3721090 B1 EP 3721090B1 EP 18833396 A EP18833396 A EP 18833396A EP 3721090 B1 EP3721090 B1 EP 3721090B1
Authority
EP
European Patent Office
Prior art keywords
lamella
bridge
outlet
opening
openings
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
EP18833396.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3721090A1 (de
Inventor
Frederic VERON
Jörg MELLAR
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
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Publication date
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Publication of EP3721090A1 publication Critical patent/EP3721090A1/de
Application granted granted Critical
Publication of EP3721090B1 publication Critical patent/EP3721090B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves

Definitions

  • the invention relates to an outlet lamellar valve, in particular a lamellar valve for closing and opening an outlet opening in a housing of a compression cylinder of a compressor.
  • Compressors are used, for example, in the braking systems of buses or trucks. Such compressors have one or more compression cylinders and are attached directly to the engine of the vehicle. Reciprocating compressors which have a duty cycle with suction, compression and discharge of air are often used. When the compressor is in operation, energy is consumed via the vehicle engine on the one hand due to compression work and on the other hand due to mechanical losses, such as friction in the piston rings or throttling losses of a reed valve.
  • energy saving is a major challenge.
  • exhaust reed valves which, as in Fig. 1 , Figures 2a and 2b shown, from a lamella 1, which closes and opens outlet openings 4 of a compression cylinder in a housing 9 of the compression cylinder, from a bridge 2, which restricts deformation of the lamella 1 in an open state of the outlet openings 4, and from fastening elements 3.
  • the outlet reed valve blocks the outlet openings 4 in order to prevent pressurized air that has already been expelled from flowing back into the compression cylinder.
  • the lamella 1 is bent away from the outlet opening by the air flow in order to allow air to flow out into an outlet channel.
  • the maximum radius of curvature of the bent-away lamella 1, which is supported on the bridge 2, is in Fig. 2a given with ⁇ . As stated above, part of the energy of the compressed air is used to bend the lamella 1.
  • a valve plate of the housing 9 of the compression cylinder is shown here, which is attached to a cylinder block.
  • a separate valve plate is not absolutely necessary and the function of the separate valve plate can be performed by a section integrated in the housing 9 of the compression cylinder.
  • JPH04105674U discloses a discharge reed valve for a compressor including a bridge for restricting maximum deformation of the fin with two discharge holes.
  • the object on which the invention is based is to provide an outlet lamellar valve which, under given dimensional boundary conditions, reduces a pressure drop at the outlet lamellar valve.
  • an outlet lamellar valve according to claim 1. Further developments of the invention are the subject of the dependent claims.
  • By providing at least one opening for a fastening element in the lamella it is possible to increase a length of the lamella in order to increase a maximum distance from the lamella to an outlet opening of the compression cylinder with at least approximately the same radius of curvature of the lamella.
  • the fastening elements can then attach a bridge, which restricts a maximum deformation of the lamella and thus determines its maximum radius of curvature, at given fastening points inside the lamella, so that no additional space is required for fastening outside the lamella.
  • the at least one opening is advantageously arranged in an outer region of the lamella, it is possible to have the outlet opening with respect to the lamella on one Position where the maximum deformation of the lamella is greatest in order to make an outlet area as large as possible.
  • two openings are provided in the lamella. This makes it possible to securely attach the bridge with two fastening elements.
  • the lamella has an elongated shape, that is to say a shape in which a dimension in a first direction is significantly smaller than a dimension in a second direction perpendicular to the first direction.
  • the openings are arranged in the region of ends in a longitudinal direction, that is to say the direction with the large dimension. This makes it possible to securely fasten the bridge with a large support spacing without the openings in the lamella exposing the outlet openings in a closed position of the lamella.
  • the bridge has at least one outflow hole, which is arranged in an area that essentially coincides with at least one of the openings of the lamella arranged as intended in the bridge, so that air, in addition to lateral outlet surfaces, through the opening (s) in the lamella can flow out through the outflow hole in the bridge.
  • the openings are advantageously open towards the ends in the longitudinal direction. There is the possibility of using the openings with an enlarged cross-sectional area for an improved outflow of air through the outflow hole.
  • the opening is arranged in a central area of the lamella, it is possible to fasten the lamella in the central area.
  • the lamella can bend upwards at several points in its edge area, whereby, compared to the fastenings in the edge area, both several outlet openings or outlet openings with a larger overall cross-section can be released and the effort for fastening the bridge is reduced, since this Fastener is only required in one place.
  • This lamella has an elongated shape so that, when the outlet openings are arranged in the region of the ends in the longitudinal direction, the lever arm for deforming the lamella is large in order to reduce the force for deforming the lamella and thus a pressure drop.
  • An anti-twist device prevents the lamella from twisting, so that the outlet openings are securely closed when the lamella is in a closed state.
  • the anti-rotation device is provided as an elevation or depression in the lamella and a depression or elevation that is complementary to the elevation or depression in the housing of the compression cylinder.
  • An elevation or depression in the lamella can be easily produced by embossing or a similar manufacturing step.
  • FIG. 11 shows a side sectional view of an exhaust reed valve
  • FIG Figure 3b shows an isometric view of the exhaust reed valve.
  • the outlet lamellar valve is provided, outlet openings ( Fig. 1 : Bzz. 4) in one housing ( Fig. 1 : Bzz. 9) to close and open a compression cylinder of a compressor.
  • FIG. 3a and 3b shows how the prior art according to the Figures 1 , 2a and 2b , also a lamella 1 for closing and opening an outlet opening not shown here ( Fig. 1 : Bzz. 4) on.
  • a single outlet opening can be provided or, alternatively, a plurality of outlet openings, wherein a total cross-sectional area of the outlet openings should be selected as large as possible in order to minimize a pressure loss when the air is expelled.
  • the outlet reed valve also has a bridge 2 in order to restrict deformation of the lamella 1.
  • the lamella 1 is released by a stream of air through the outlet openings ( Fig. 1 : Bzz. 4) bent upwards until the outlet openings ( Fig. 1 : Bzz. 4) rests on a support surface 5 facing the lamella 1.
  • the bridge 2 has in one area a support surface 5 with a predetermined radius of curvature ⁇ which is essentially identical to that in FIG Fig. 2a
  • the radius of curvature shown is ⁇ , so that, on the one hand, the largest possible outlet area is realized, but, on the other hand, an increase in bending stresses does not reduce a service life.
  • the bridge 2 has a depression (not shown here) through which the lamella 1 is guided laterally in order to restrict the lamella 1 from shifting laterally.
  • the bridge 2 also has through holes 8 for fastening elements 3.
  • the fastening elements 3 here each consist of bolts and nuts, but can also be designed in a different form, for example as rivets.
  • Figure 4a shows an isometric view of the lamella 1 and the fastening elements 3.
  • the openings 6 are not here, as in FIG Figure 3b embodiment shown, formed as through holes matched to a dimension of the fastening element 3, but have dimensions described below.
  • Figure 4b shows a plan view of an alternative lamella 1.
  • the openings 6 in this lamella 1 are open towards the ends in the longitudinal direction.
  • the bridge 2 has through outflow holes 7 with predetermined Dimensions on.
  • the outflow holes 7 are each provided in an area which essentially coincides with the openings 6 of the lamella 1 arranged as intended in the bridge 2.
  • the dimensions of the openings 6 are selected such that they essentially correspond to the predetermined dimensions of the associated outflow holes 7.
  • the bridge 2 has the outflow holes 7 in addition to the through holes 8 for the fastening elements 3.
  • Figure 5a Figure 3 is an exploded view of the exhaust reed valve according to an embodiment not forming part of the invention.
  • the lamella 1 does not have the opening 6 in an outer area of the lamella 1, but the opening 6 through which the fastening element 3 penetrates the lamella 1 is arranged in a central area.
  • the lamella 1 is provided for closing and opening the outlet openings 4.
  • the bridge 2 is also provided for limiting the maximum deformation of the lamella 1 in an open state of the outlet openings 4.
  • the bridge 2 also has the support surface 5 facing the lamella 1 here. Since the opening 6 for the fastening element 3 is arranged in the central area of the lamella 1, the bridge 2 and also the lamella 1 are fastened here in their respective central area.
  • Figure 5b a side view of the bridge of the exhaust valve according to the embodiment of FIG Figure 5a , is shown, here too the radius of curvature ⁇ essentially corresponds to that in Fig. 2a and 3a Radii of curvature ⁇ shown, so that here, too, a service life of the lamella 1 is not reduced by an increase in the bending stresses.
  • a rotation lock is provided between the lamella 1 and the housing 9 of the compression cylinder.
  • the anti-rotation device consists of three recesses 10 which are made in the housing 9 of the compression cylinder.
  • embossings 11 complementary to the recesses 10 are provided, which thus protrude downward and can engage in the recesses 10 in order to ensure a position of the lamella 1 in relation to the housing 9.
  • elevations can also be provided in the housing 9, the lamella 1 then having impressions complementary to the elevations.
  • the lamella 1 rests against the outlet opening (s) 4 during an intake stroke of the compressor by adopting its original shape and is sucked onto the housing 9 of the compression cylinder by a negative pressure in the compression cylinder in order to close the outlet opening (s). 4 to close.
  • the lamella 1 is bent away from the outlet opening (s) 4 by the air flowing out due to the pressure in the compression cylinder, so that the air can flow out.
  • the lamella 1 is bent until it rests against the support surface 5 of the bridge 2, a maximum radius of curvature of the lamella 1 being defined. Due to the air flowing out, the lamella 1 lifts from the housing 9 in order to minimize wear on its edges. The air flows out laterally through outflow surfaces.
  • outflow hole 7 or the outflow holes 7 and enlarged openings 6 are provided in the lamella 1, air can also flow out of the outlet openings 4, whereby a more undisturbed flow is usually possible here than through the lateral outflow surfaces, due to the installation space.
  • the air can flow out of the outlet openings 4 in an area that runs approximately around the outlet opening 4, so that the pressure drop is further reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP18833396.7A 2017-12-06 2018-12-03 Auslasslamellenventil Active EP3721090B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017222091.0A DE102017222091A1 (de) 2017-12-06 2017-12-06 Auslasslamellenventil
PCT/EP2018/083316 WO2019110489A1 (de) 2017-12-06 2018-12-03 Auslasslamellenventil

Publications (2)

Publication Number Publication Date
EP3721090A1 EP3721090A1 (de) 2020-10-14
EP3721090B1 true EP3721090B1 (de) 2021-11-03

Family

ID=65013641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18833396.7A Active EP3721090B1 (de) 2017-12-06 2018-12-03 Auslasslamellenventil

Country Status (4)

Country Link
EP (1) EP3721090B1 (zh)
CN (1) CN111433458B (zh)
DE (1) DE102017222091A1 (zh)
WO (1) WO2019110489A1 (zh)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT251178B (de) * 1965-07-02 1966-12-27 Hoerbiger Ventilwerke Ag Ventilsatz für Kolbenverdichter
DE1956259B2 (de) * 1969-11-08 1971-12-09 Westinghouse Bremsen und Apparate bau GmbH, 3000 Hannover Druckventil fuer kompressoren
AT353391B (de) * 1977-01-27 1979-11-12 Hoerbiger & Co Lamellenventil fuer verdichter
JPS53127306U (zh) * 1977-03-17 1978-10-09
GB2004981B (en) * 1977-09-29 1982-01-27 Mitsubishi Electric Corp Discharge valve arrangement for a compressor
JPS63158593U (zh) * 1987-04-07 1988-10-18
JPH04105674U (ja) * 1991-02-25 1992-09-11 三輪精機株式会社 リード弁装置
KR960002111Y1 (ko) * 1991-05-06 1996-03-14 삼성전자 주식회사 압축기의 토출 밸브 장치
US5213125A (en) * 1992-05-28 1993-05-25 Thomas Industries Inc. Valve plate with a recessed valve assembly
US5327932A (en) * 1993-04-19 1994-07-12 Thomas Industries Inc. Valve restraint enhancement
JP2016223398A (ja) * 2015-06-02 2016-12-28 大豊工業株式会社 バキュームポンプ

Also Published As

Publication number Publication date
WO2019110489A1 (de) 2019-06-13
DE102017222091A1 (de) 2019-06-06
CN111433458B (zh) 2022-05-13
EP3721090A1 (de) 2020-10-14
BR112020010273A2 (pt) 2020-10-13
CN111433458A (zh) 2020-07-17

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