EP2755738A1 - Appareil de filtration - Google Patents

Appareil de filtration

Info

Publication number
EP2755738A1
EP2755738A1 EP12759122.0A EP12759122A EP2755738A1 EP 2755738 A1 EP2755738 A1 EP 2755738A1 EP 12759122 A EP12759122 A EP 12759122A EP 2755738 A1 EP2755738 A1 EP 2755738A1
Authority
EP
European Patent Office
Prior art keywords
space
piston
filter
compensation
chamber
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.)
Withdrawn
Application number
EP12759122.0A
Other languages
German (de)
English (en)
Inventor
Markus Haist
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.)
Mahle Industriefiltration GmbH
Original Assignee
Wolfgang Barth & Co KG GmbH
Mahle International 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 Wolfgang Barth & Co KG GmbH, Mahle International GmbH filed Critical Wolfgang Barth & Co KG GmbH
Publication of EP2755738A1 publication Critical patent/EP2755738A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B01D29/35—Self-supporting filtering elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
    • B01D29/48—Edge filtering elements, i.e. using contiguous impervious surfaces of spirally or helically wound bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B01D29/54—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/665—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps by using pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element

Definitions

  • the present invention relates to a compensation device for a filter device for filtering liquid fuels for internal combustion engines, in particular for large piston engines, such as marine diesel engines or combined heat and power plants, according to the preamble of claim 1.
  • the invention also relates to a filter device equipped with such a compensation device.
  • Such low-grade fuels may contain comparatively coarse impurities and so-called cat fines (catalyst residues having a particle size smaller than 20 ⁇ m) which have to be filtered out by means of a suitable filter device before the fuel reaches the combustion chambers of the respective piston engine.
  • This filter devices of the type mentioned can be used.
  • Such a filter device usually comprises a filter device which has a filter body which separates a raw space from a clean space in a filter chamber. During the filtering operation impurities can accumulate unfiltered on the filter body and gradually clog the filter body.
  • a compensating device can also be provided which, for example, has a compensating piston which is arranged so that it can be adjusted in terms of a compensating cylinder space communicating with the clean space.
  • fuel can pass from the clean side to the raw side, which can lead to a pressure drop on the clean side.
  • the balance piston of the compensation Device pure fuel from the compensation cylinder space in the clean room eject.
  • a filter device for filtering liquid fuels which comprises a filter device, a backwashing device and a compensation device.
  • the filter device has a filter body which separates a raw space from a clean room in a filter chamber.
  • the backwashing device is used for backwashing the filter body with purified fuel.
  • the compensating device has a compensating piston, which is arranged so that it can be adjusted in a compensating cylinder space which communicates with the filter chamber or with the clean room.
  • the compensation piston in the compensation cylinder space separates a dirty space communicating with a dirt channel arranged in the crude space of the back-flushing device from a supply space for purified fuel communicating with the clean room.
  • the compensation device for Hubverstellen of the piston on a screw which has a rotationally driven, the piston in a threaded opening passing through the central threaded spindle and at least one piston in a guide opening passing through eccentric guide rod.
  • an electric motor for driving the threaded spindle requires a comparatively complex electrical control system and a comparatively extensive sensor system in order to be able to control the piston as precisely as possible during the backwashing for emptying the storage space and subsequently during the refilling of the storage space the pressure in the fuel on the clean side changes only insignificantly.
  • Such a complex control and sensor technology is comparatively prone to error and maintenance-intensive.
  • the present invention is concerned with the problem of providing an improved embodiment for a filter device or a compensation device of the type mentioned, which is characterized in particular by the fact that it has a comparatively low susceptibility to failure and shows a low maintenance requirement.
  • the invention is based on the general idea to couple the balance piston via a piston rod with a storage piston, which limits a work space fluidly separated from the reservoir. Further, an accumulator for storing a hydraulic working fluid is provided, the storage space communicating with the working space is connected. Due to this design, it is possible to design the balance piston as a passive piston, so that the compensating piston can strokeverstellen without additional external drive exclusively taking advantage of the internally existing pressure forces in the compensation cylinder space. In other words, by the structure presented here, the filter device comes off in particular without an electric drive for the balance piston, so that it can be dispensed with an associated complex control and sensors. On the one hand, the filter device according to the invention can thereby be realized comparatively inexpensively. On the other hand, operational reliability and reliability are increasing.
  • the accumulator piston may have a smaller outer cross section than the compensating piston.
  • This can be a pressure translation between pantry and work space realize. For example, this can - depending on the design of the respective accumulator - reduce the space requirement.
  • a pressure intensification is particularly advantageous when the pressure accumulator is designed as a hydro-pneumatic pressure accumulator, preferably membrane or bladder accumulator, which thus operates with a pneumatic accumulator medium in order to be able to store a hydraulic working medium with a pressure.
  • any type of storage is conceivable, although not always useful, eg piston accumulator, spring accumulator, etc.
  • the preferred hydro-pneumatic pressure accumulator exemplified as bladder accumulator, absorbs the displaced working fluid.
  • the compressed gas which is separated from the working fluid by a membrane (storage bubble), is compressed.
  • the hydraulic working fluid can be stored at a high pressure.
  • a partition wall may be provided which separates the working space from the storage space and through which the piston rod extends, in particular dense, therethrough.
  • a component containing the storage cylinder space can be directly attached via said dividing wall to a housing of the filter apparatus which contains the compensation cylinder space. This results in a particularly compact design for the filter device.
  • the compensating piston may be driven to its stroke adjustment in the compensating cylinder space without external energy.
  • the balance piston to its stroke adjustment in the compensation cylinder space preferably exclusively, by the be driven at the two pistons acting pressure differences.
  • an internal drive is realized by acting on the balance piston and the accumulator piston pressure differences, which preferably requires no external, foreign energy-requiring drive.
  • a comparatively small pressure difference prevails on the balance piston, since the dirty space is fluidically coupled through the filter body to the clean side, while the storage space is fluidically connected directly to the clean side.
  • the surface of the compensating piston exposed to the storage space is reduced by the piston rod passing through the storage space, that is to say smaller than the area of the compensating piston exposed to the dirt space.
  • the storage piston separates the working space in the storage cylinder space from a rear space, which is located on a side of the storage piston facing away from the piston rod and which is preferably fluidically connected to an environment of the filter device.
  • a comparatively small pressure in particular the ambient pressure
  • the accumulator pressure of the accumulator is applied to the side facing the working chamber. This results in the accumulator piston a significant pressure difference, which drives the accumulator piston in the direction of the rear space, which increases the working space.
  • the dirty space is fluidically connected to a comparatively pressure-free dirt reservoir, so that, in particular, there is substantially ambient pressure at the side of the balance piston facing the dirty space.
  • the stock space facing side of the balance piston still prevails on the clean side of the filter device prevailing, relatively high pressure at which the fuel of the respective internal combustion engine is supplied.
  • the balance piston now drives a comparatively large pressure difference to the balance piston in the direction of dirty space, whereby the dirt is expelled from the dirty space by the volume of the dirty space is reduced, while the volume of the storage space for filling the pantry is increased accordingly.
  • the accumulator piston is adjusted back via the piston rod in such a way that the accumulator piston increases the rear space and reduces the working space.
  • the storage piston drives the respective working fluid out of the working space and conveys it back into the storage space of the pressure accumulator.
  • the compensation device may have a control block, which is connected on the one hand communicating with the working space and the other with the storage space, in particular such that the storage space is communicatively connected through the control block with the working space.
  • a control block By using such a control block, various hydraulic and / or pneumatic control components can be easily integrated structurally into the filter device.
  • the control block simplifies the installation of the pressure accumulator on the filter unit.
  • control block can have a hydraulic loading path, which contains a loading throttle device for throttling a loading flow that fills the storage space. Additionally or alternatively, the control block may have a hydraulic discharge path which includes a discharge throttle device for throttling a discharge current discharging the storage space.
  • the integration of the throttle devices in the control block results in a compact design. In addition, leakage and leakage problems can be avoided or reduced.
  • the discharge throttle device is expediently designed so that adjusts an actuating speed or stroke speed during the backwashing process for the balance piston, which is dimensioned so that the balance piston expels just as much fuel from the storage room to the clean side, as fuel must emerge on the clean side of the filter chamber In order to ensure the desired supply of the internal combustion engine with fuel at a nearly constant pressure.
  • the loading throttling device is expediently designed such that, after a backwashing process, the filling of the storage space with working medium and the filling of the storage space with fuel can be carried out so slowly that even here on the clean side of the filter device there are no unacceptable pressure fluctuations in the supply of the internal combustion engine Fuel occur.
  • an embodiment is expedient in which the loading throttle device throttles more than the discharge throttle device.
  • the discharge of the storage space so the backwashing process, take several seconds, while the refilling of the storage space or the storage room can take several minutes.
  • the respective throttle device may also be assigned a correspondingly oriented non-return valve.
  • control block may have a switching valve which blocks in a first switching position connected to the working space first port of the control block and connected to the storage space second port of the control block and in a second switching position connects the two terminals together.
  • a switching valve which blocks in a first switching position connected to the working space first port of the control block and connected to the storage space second port of the control block and in a second switching position connects the two terminals together.
  • the filter device may comprise a housing which contains the filter chamber and the compensation cylinder space in an integral body.
  • This embodiment is based on the general idea to provide a housing of the filter device with an integral body that contains both the filter chamber and the compensation cylinder space.
  • Such a body made in one piece or in one piece unites a housing enclosing the filter chamber and a housing enclosing the compensation cylinder space in a common component that can be produced more cheaply than two separate housing parts.
  • Such a common housing basically only needs to be heated at one point to heat both the filter chamber and the compensation cylinder space. This is especially true when the body is made of metal, whereby heat introduced into the body is distributed by itself throughout the body.
  • a heating of the housing is particularly advantageous if heavy fuel oil is used as the fuel, which has a comparatively high viscosity. At low ambient temperatures, such low-grade fuels can become comparatively tough, endangering the filtration operation.
  • Through the common housing eliminates the required heating a separate cleaning device. By heating the filter chamber and the compensation cylinder space of the filter device on the one hand, a trouble-free operation of the filter device is guaranteed. On the other hand, the filtered fuel stored in the compensation cylinder space can be readily conveyed to equalize the pressure.
  • the storage cylinder space can now be formed in an additional body, which is grown on the outside of the body of the housing.
  • a comparatively easily realizable built construction is favored here as well.
  • control block may be integrated into the additional body or alternatively be attached to this additional body.
  • the balance piston in the compensation cylinder space separates a dirty space from a storage space.
  • the dirty space communicates with the raw space or with a arranged in the crude space dirt channel the backwashing.
  • the storage room communicates with the clean room and serves to store purified fuel.
  • the compensating piston can be used on the one hand to promote fuel from the storage room into the clean room to avoid a pressure drop in the clean room.
  • the balance piston can be used simultaneously to suck out impurities from the raw space or from the dirt channel and to suck it into the dirt space. This gives the balancing piston a double function, whereby, for example, an additional suction device for generating a pressure in the dirt channel or to remove the impurities from the raw space can be omitted.
  • the housing on the body can have a first dirt connection communicating with the raw space or with the dirt channel, wherein in addition a dirt connection communicating with the dirt space is provided.
  • a control valve with three connections can be provided, which connects in a first switching position connected to the first dirt port first port with its connected to the second dirt port second port and locks his connectable to a dirt reservoir third port and in a second Switching position locks the first port and the second port connects to the third port.
  • a backwashing process can be performed.
  • the housing may have on its body a communicating with the raw space connected to the inlet port and communicating with the clean room outlet port.
  • the filter chamber and the cylinder chamber can be arranged so that a longitudinal central axis of the filter chamber extends transversely to the longitudinal center axis of the cylinder chamber.
  • the filter body by means of a drive about its longitudinal central axis to be rotatably driven and rotatably mounted in a housing of the filter device.
  • the backwashing device can work with a stationary suction channel.
  • the filter body may be a cylinder which has a filtering effect, in which case the crude space expediently comprises a cylindrical space.
  • the filter body may comprise an inner cylinder and an outer cylinder, each having a filtering action.
  • the crude space comprises an annular space formed between the cylinders.
  • the clean room can now comprise a cylindrical inner space formed inside the inner cylinder and an annular outer space formed between the outer cylinder and a housing wall.
  • the dirt channel can be arranged in the aforementioned annular space between the two cylinders and cooperate with both cylinders of the filter body for backwashing.
  • the dirt channel may be formed in a suction tube which is arranged in the annular space and has the diametrically opposite suction openings. At least one of these suction openings acts together with the outer cylinder for backwashing, while at least one such suction opening cooperates with the inner cylinder for backwashing.
  • a housing of the filter device may be designed as a metal part.
  • a, in particular metallic, housing of the filter device may have a Schuffeneinlass and a Walkerstoff- outlet.
  • Schuffeneinlass and Schuffenauslass can be communicating with each other via a Schuffenpfad communicating, which in the interior ren of the housing runs.
  • a heater can be easily connected to the housing. Due to the internal Schuffenpfad provided via the heater heat can be performed particularly favorable to the points or areas in the housing, which are to be heated during operation and preferably at standstill of the filter device.
  • the filter chamber and the compensating cylinder space can thereby be preferably subjected to heat.
  • a heating means for example, a suitable liquid, such as thermal oil, or a gas, such as water vapor is suitable.
  • the heating medium path may comprise a drain chamber communicating with the heating medium outlet and an inlet chamber communicating with the heating medium inlet, wherein at least one of these chambers is separated from the compensating cylinder space and / or the filter space by a housing wall.
  • the drainage chamber can be separated by a überströmbare and / or underströmbare partition from Zulaufraum.
  • the partition may be formed on a cover inserted into the housing or integrally on the housing.
  • 1 is a side view of a filter device
  • FIG. 2 shows a further, rotated by 90 ° side view of the filter device, corresponding to a viewing direction II in Fig. 1,
  • Fig. 3 is a sectional view of the filter device according to section lines III in
  • Fig. 4 is a sectional view of the filter device according to section lines IV in
  • FIG. 5 is a sectional view of a portion of the filter device in another embodiment
  • FIG. 6 is a sectional view as in Fig. 3, but in the opposite direction,
  • 7 is a simplified, partially sectioned side view of the filter device with balancing device and accumulator
  • 8 is another side view of the balancing device with accumulator
  • Fig. 9 is a circuit diagram-like schematic diagram of the compensation device.
  • a filter device 1 with the aid of which liquid fuels can be filtered, a filter device 2, a backwash device 3, a compensation device 4 and a housing 5.
  • the filter device 1 comes in internal combustion engines, especially in large piston engines or large engines used, as these are often operated with low-quality fuels. For example, an application for marine diesel engines is conceivable. Likewise, a use in generators or combined heat and power plants into consideration.
  • the term internal combustion engine includes all types of piston engines (reciprocating engines and rotary engines) and turbomachinery.
  • the filter device 2 comprises according to FIGS. 3 to 6 at least one filter body 6, which is arranged in a filter chamber 7.
  • the filter body 6 separates in this filter chamber 7 a raw space 8 of a clean room 9.
  • the backwash device 3 is used for backwashing the filter body 6, being used for backwashing purified or filtered fuel or a foreign medium.
  • the backwashing device 3 according to FIG. 4 has a dirt channel 10, which is arranged in the raw space 8.
  • the dirt channel 10 is formed in a suction tube 1 1, which is positioned in the crude space 8 so that it extends along the raw-side surface of the filter body 6.
  • the suction tube 1 1 has at a respective filter body 6 side facing each at least one slot-shaped suction port 12, through which a Schmutzansaugung is feasible.
  • the filter body 6 is cylindrical, in particular circular cylindrical designed. A longitudinal center axis of the filter body 6 is designated in FIGS. 3 and 4 with 13.
  • the suction pipe 1 1 extends over the entire axial height of the filter body 6.
  • the filter body 6 is designed as a double cylinder, so that it has an inner cylinder 14 and an outer cylinder 15th includes. Both cylinders have a filtering effect, so each form a filter body.
  • FIG. 5 an embodiment is possible in which the filter body 6 has only one cylinder.
  • the cylinders 14, 15 are represented by a perforated wall, it is clear that this represents only one exemplary embodiment.
  • the respective cylinder 14, 15 may have any other suitable filter structure.
  • the cylinders 14, 15 may be configured as edge gap filters. Likewise, they can be equipped with a perforated foil, in particular with an edge perforated foil. Likewise, a pleated filter material comes into question.
  • the blanks 8 comprise an annular space 16, which is formed radially between the two cylinders 14, 15.
  • the filter body 6 in the example in the region of this annular space 16 downwardly open, whereby the annular space 16 communicates with the rest of the crude space 8.
  • the clean room 9 comprises a cylindrical inner space 17, which is formed in the interior of the inner cylinder 14, and an annular outer space 18, which is formed radially between the outer cylinder 15 and a housing wall 19.
  • the housing wall 19 surrounds the filter chamber 7 in an annular manner.
  • the inner space 17 communicates through at least one axial opening 20 which, in a disk unit connecting the two cylinders 14, 15 to one another at an axial end of the filter body 6. shaped bottom 21 is formed, with the remaining clean room 9 and derfoundraum 18.
  • a filter body 6 is used, which, unlike the previously described embodiment has only a single cylinder.
  • the clean room 9 surrounds the filter body 6 in an annular manner, while the filter body 6 encloses the raw space 8 in an annular manner.
  • the compensating device 4 comprises a compensating piston 22, which is arranged in a stroke-adjustable manner in a compensating cylinder space 23.
  • the compensation cylinder space 23 communicates with the clean room 9.
  • a corresponding, preferably integrated, connecting channel 24 can be seen in FIGS. 5 and 7.
  • the compensating piston 22 in the compensating cylinder space 23 separates a dirt chamber 25, which is located on the left of the compensating piston 22 in FIG. 5, from a reservoir 26 which is located on the right of the compensating piston 22 in FIG.
  • the dirt chamber 25 is located on the right of the balance piston 22, while the reservoir 26 is located to the left thereof.
  • the storage space 26 is used for storing purified fuel and communicates, for example via the connecting channel 24, with the clean room 9 of the filter device 2.
  • the dirty space 25, however, can be communicatively connected to the dirt channel 10, which will be explained in more detail below.
  • the housing 5 has in particular a body 27, which is designed integrally, that is made in one piece or is made of one piece.
  • the body 27 is an integrally molded casting.
  • the body 27 is made of metal.
  • the body 27 contains both the filter chamber 7 and the compensation cylinder space 23. pus 27 for accommodating both components of the filter device 2 and components of the compensating device 4.
  • the filter body 6 and the balance piston 22 are housed in the body 27. This results in a particularly compact design for the filter device. 1 At least in the axial direction, that is parallel to the longitudinal direction of the filter body 6, the body 27 and thus the filter device 1 build comparatively short.
  • the connecting channel 24 is formed integrally in the body 27, which z. B. Figs. 5 and 7 can be removed.
  • the body 27 or the housing 2 has a raw-side fuel inlet 28 and a clean-side fuel outlet 29.
  • the fuel inlet 28 is equipped with an inlet flange 30.
  • the fuel outlet 29 is provided with a corresponding outlet flange 31.
  • the flanges 30, 31 are either attached to the body 27 or made integral therewith. Other types of connection, such as Threaded connections or clamp closures are possible.
  • the housing 5 or the body 27 has a first dirt connection
  • the first dirt port 32 is integrally formed on the body 27.
  • the second dirt port 33 is formed on a cover 34, with which the compensation cylinder space 23 is axially closed on a side facing the dirt chamber 25.
  • said cover 34 is screwed to the body 27.
  • such a cover 34 may also be omitted, if in its place a bottom is formed integrally on the housing 5 or on the body 27.
  • the two dirt ports 32, 33 are controlled by a control valve 35.
  • an adjusting device 36 is provided for actuating the control valve 35.
  • the control valve 35 has three connections, namely a first connection 37 connected to the first dirt connection 32, a second connection 38 connected to the second dirt connection 33, and a third connection 39 to which a corresponding connection line (not shown here) likewise not shown Dirt reservoir for collecting cleaned impurities can be connected.
  • a first connection line 40 connects the first connection 37 to the first dirt connection 32.
  • a second connection line 41 connects the second connection 38 to the second dirt connection 33.
  • the control valve 35 connects the first connection 37 to the second connection 38 and blocks the first connection third terminal 39. In the first switching position thus the two dirt ports 32, 33 communicating with each other.
  • the control valve 35 locks the first port 37 and connects the second port 38 with the third port 39. In the second switching position thus the second dirt port 33 and said dirt reservoir are communicatively connected to each other.
  • the compensation device 4 also comprises a storage piston 42, which is fixedly connected to the compensation piston 22 via a piston rod 43.
  • the accumulator piston 42 is arranged in a memory cylinder space 44 hubver plausible.
  • This storage cylinder space 44 is missing in the illustrations of FIGS. 1 to 6.
  • the storage piston 42 delimits a working space 45 which is fluidically separated from the storage space 26.
  • the piston rod 43 passes through a partition wall 46 which separates the working chamber 45 from the reservoir 26.
  • the piston rod 43 is passed tightly through the partition wall 46.
  • corresponding sealing means are not shown here.
  • the working space 45 from a back space 47, which is fluidly connected, for example, with an environment 48 of the filter device 1.
  • the compensating device 4 here also has a pressure accumulator 49, which contains a storage space 50.
  • This pressure accumulator 49 is not shown in FIGS. 1 to 6.
  • the storage space 50 is now fluidly connected to the working space 45, so that a liquid working medium between the storage space 50 and the working space 45 is displaceable.
  • the accumulator piston 42 has an outer cross section 72 which is smaller than an outer cross section 73 of the compensating piston 22.
  • the compensation device 4 shown here operates without external energy, so it comes without external drive, the energy needed.
  • the stroke adjustments of the balance piston 22 are made possible only by the internally acting pressure forces. In doing so, the pressure difference between the pressures in the reservoir 26 and in the dirt chamber 25 acts on the balance piston 22.
  • the pressure in the dirt chamber 25 is approximately as large as in the reservoir 26.
  • the pressure difference on the accumulator piston 42 is comparatively large, since the pressure in the working chamber 45 corresponds to the accumulator pressure of the accumulator 49, while in the rear chamber 47 there is preferably ambient pressure.
  • the compensating piston 42 can be transferred from a starting position indicated in Fig. 9 right with a broken line in the left end position shown in Fig. 9 with a solid line.
  • the dirt chamber 25 After completion of the backwashing the dirt chamber 25 is connected to the dirt reservoir, so that the balancing piston 22, a large pressure difference prevails, which founded upon the balancing piston 22 and thus also connected via the piston rod 43 accumulator piston 42 in the starting position.
  • the accumulator piston 42 drives the working medium out of the working raum 45 and shifts it back into the storage space 50.
  • the storage space 26 is again filled with fuel.
  • the compensation device 4 here has a control block 74, which has a first connection 75 communicating with the working space 45 and a second connection 76 communicating with the storage space 50.
  • the control block 74 is communicatively connected on the one hand to the working space 45 and on the other hand to the storage space 50.
  • the storage space 50 is fluidically connected through the control block 74 to the working space 45.
  • the control block 74 includes a hydraulic loading path 77 that includes a load throttle 78 and a load check valve 79. With the help of the loading throttle device 78, a load flow can be throttled, which leads to the filling of the storage space 50.
  • the control block 74 includes a hydraulic discharge path 80 including a discharge throttle 81 and a discharge check valve 82. Via the discharge path 80, a discharge current can be throttled, which empties the storage space 50 in the working space 45. By way of the throttle action of the discharge throttle device 81, the actuating speed of the pistons 22 and 42 can again be predetermined.
  • the adjusting movement of the balancing piston 22 can be specifically predetermined in terms of their speed, on the one hand an effective backwashing can be realized, while keeping pressure fluctuations on the clean side or in the clean room 9 as small as possible.
  • the two throttle devices 78 and 81 suitably have different throttle effects.
  • the charge throttle 78 is provided with a stronger throttle effect than the discharge throttle 81.
  • the discharge of the accumulator 50 is much faster than its charge.
  • control block 74 also includes a switching valve 83 which is adjustable between a first switching position shown in Fig. 9 or blocking position and a second switching position or passage position or connecting position. In the first switching position, the switching valve 83 blocks the first port 75 and the second port 76. In the second switching position, the switching valve 83 connects the two ports 75, 76 with each other.
  • a pressure relief valve 84, a check valve 85 and a accumulator pressure gauge 86 are also provided. Furthermore, a working space pressure gauge 87 is shown.
  • the storage cylinder space 44 can be formed in an additional carcass 88, which is expediently mounted on the outside of the carcass 27 of the housing 5.
  • the additional body 88 is flanged to the body 27.
  • control block 74 is attached to the additional carcass 88 in the example shown. In another embodiment, the control block 74 may be integrated with the auxiliary body 88.
  • the backwashing device 3 expediently acts together only with a circumferential segment delimited in the peripheral direction of the filter body 6 in order to disturb the filtration operation as little as possible. So that the surface of the filter body. 6 or the surfaces of the cylinders 14, 15 can be backwashed along its entire circumference, a relative movement between the suction pipe 1 1 and the filter body 6 is required.
  • a drive 51 is provided for this purpose, with the aid of which the filter body 6 in the housing 5 about the longitudinal center axis 13 of the filter body 6 is rotatably driven.
  • the filter body 6 is rotatably mounted on the body 27.
  • a corresponding rotary bearing is designated 52 in FIG.
  • the rotary drive 51 includes, for example, an electric motor 53 and a gear 54, which drives the filter body 6 via a drive shaft 55.
  • the suction tube 1 1 is fixedly mounted in the body 27, so that the entire raw-side surface of the filter body 6 and the cylinder 14, 15 passes through the suction openings 12 by the rotation of the filter body 6.
  • the dirt channel 10 with two cylinders 14, 15 cooperate for backwashing.
  • a heating medium outlet 56 and a heating medium inlet 57 are formed on the body 27 and on the housing 5, respectively.
  • the Schuffenauslass 56 and the Schuffeneinlass 57 are communicatively connected by a Schuffenpfad 58 with each other, which is indicated in Fig. 6 by an arrow and extends inside the housing 5.
  • a Wienstoffpfad 58 includes the housing 5 and contains the body 27 on a side facing away from the filter chamber 7 side a cavity 59 which is closed by a cover inserted into the body 27 60.
  • a partition wall 61 which protrudes from the cover 60 and protrudes into the cavity 59, is attached to this cover 60.
  • the Partition 61 may also be formed integrally on the body 27.
  • the partition wall 61 is dimensioned such that a distance 63 remains between the dividing wall 61 and a wall 60 opposite the cover 60, as a result of which the dividing wall 61 can be overflowed or flowed around at its end remote from the cover 60.
  • the heating medium path 58 passes around the partition wall 61.
  • the heating medium path 58 includes a drain space 64 communicated with the heating medium outlet 56 and an inlet space 65 communicated with the heating medium inlet 57.
  • the drainage space 64 is separated from the compensation cylinder space 23 by a housing wall 66 integrally formed on the body 27.
  • the compensation cylinder space 23 is closed axially on a side facing the storage space 26 by a further cover or bottom 67, which is screwed to the body 27.
  • the floor 67 may be the
  • Form partition 46 The body 27 or the housing 5 is axially closed on a side facing away from the compensating device 4 by means of a cover 68 which carries the drive 51, is penetrated by the drive shaft 55 and which is screwed to the body 27 in the example.
  • the body 27 is equipped with a corresponding flange 69.
  • running opening 70 can be seen, which is controllable with an idling valve 71, which is shown in Fig. 1.
  • the filter device 1 presented here operates as follows:
  • Uncleaned liquid fuel enters the crude space 8 via the fuel inlet 28. In order to reach the clean room 9, it must flow through the filter body 6 or its cylinder 14, 15. From the clean room 9, the purified fuel passes into the storage space 26 on the one hand and, on the other hand, it exits the housing 5 through the fuel outlet 29. To realize a backwashing of the filter body 6 or the cylinders 14, 15, a negative pressure is generated in the dirt channel 10 relative to the clean room 9. This negative pressure is realized in the embodiment shown here by an axial adjustment of the balance piston 22. In this case, the compensating piston 22 begins at the initial position shown in Fig. 5, which is characterized by a minimal volume in the dirt chamber 25 and a maximum volume in the reservoir 26.
  • the volume increases in the dirt chamber 25, thereby reducing the pressure therein.
  • the adjusted in its first switching position control valve 35 causes this pressure difference is transmitted to the dirt channel 10. Accordingly, dirt is suctioned off from the surfaces of the cylinders 14, 15 via the suction openings 12 on the raw side.
  • pure-side fuel flows counter to the filtering direction, ie from the clean side to the raw side, whereby the desired backwashing is realized.
  • the backwashed impurities are sucked via the dirt channel 10 in the dirt chamber 25.
  • the stroke adjustment of the balance piston 22 simultaneously reduces the volume of the storage space 26, whereby filtered fuel contained therein passes through the connecting channel 24 into the clean room 9.
  • both the compensation device 4 and the filter device 2 can be sufficiently heated to even with tough fuels and especially with tough filtered out of the fuel impurities such as tar ensure sufficient temperature, which makes it possible to operate the filter device 1 properly and in particular to expel tough impurities.
  • the balance piston 22 is in the position shown on the right with a broken line.
  • the volumes of the dirty space 25 and the working space 45 are minimized, while the storage space 26 and the storage space 50 are filled to the maximum, one with fuel and the other with a basically arbitrary hydraulic working means, in which it In principle, however, can also act on fuel.
  • the dirt chamber 25 is connected to the dirt channel 10. This is done by a corresponding switching operation of the aforementioned control valve 35. As a result, contaminants can be sucked off the filter body 6 on the raw side.
  • the balance piston 22 has to move in the direction of the reservoir 26 in order, on the one hand, to suck the contaminants into the dirty space 25 and, on the other hand, to push out fuel from the reservoir 26 to the clean room 9 to reduce or avoid pressure fluctuations.
  • the compensating piston 22 is in this case driven predominantly by the accumulator pressure in the working chamber 45 or on the accumulator piston 42. If the switching valve 83 is present, this is for this purpose switched to its second switching position, in which it connects the two ports 75, 76 with each other, so that the storage space 50 communicates with the working space 45. At the end of the backwashing process, the compensating piston 22 reaches the end position shown in FIG. 9 with a solid line.
  • the storage space 26 and the storage space 50 are largely emptied.
  • the dirt space 25 is connected to the dirt reservoir, which is again achieved by a corresponding switching operation of the abovementioned control valve 35.
  • the high pressure in the reservoir 26 drives the balance piston 22 in the direction of dirt chamber 25, whereby the dirt is expelled into the dirt reservoir.
  • the compensating piston 22 pulls the accumulator piston 42 into the working chamber 45 against the accumulator pressure of the accumulator 49 via the piston rod 43.
  • the working fluid is expelled from the working space 45 and returned to the storage space 50.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Filtration Of Liquid (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un appareil de filtration (1) destiné à filtrer des carburants liquides pour moteurs à combustion interne, en particulier pour des moteurs à pistons volumineux, tels que des moteurs diesel de marine. Ledit appareil comprend un dispositif de filtration qui comporte au moins un corps filtrant séparant, dans une chambre de filtration, un espace à carburant brut d'un espace à carburant purifié, un dispositif de lavage à contre-courant pour le lavage à contre-courant du corps filtrant avec du carburant purifié ou un milieu étranger, et un dispositif de compensation (4) comportant un piston de compensation (22) qui est placé dans un espace de cylindre de compensation (23) communiquant avec l'espace à carburant purifié et qui peut y effectuer une course de déplacement, le piston de compensation (22) séparant, dans l'espace de cylindre de compensation (23), un espace pour impuretés (25) communiquant avec l'espace à carburant brut d'un espace de stockage (26) pour le carburant purifié communiquant avec l'espace à carburant purifié. Une sécurité de fonctionnement accrue est obtenue lorsque le dispositif de compensation (4) présente un piston accumulateur (42) qui est relié de manière fixe au piston de compensation (22) par l'intermédiaire d'une tige de piston (43), qui est placé dans un espace de cylindre accumulateur (44) de manière à pouvoir y effectuer une course de déplacement, et qui délimite, dans l'espace du cylindre accumulateur (44), un espace de traitement (45) séparé fluidiquement de l'espace de stockage (26), le dispositif de compensation (4) présentant un accumulateur de pression (49) dont l'espace d'accumulation (50) communique avec l'espace de traitement (45).
EP12759122.0A 2011-09-14 2012-09-13 Appareil de filtration Withdrawn EP2755738A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110082695 DE102011082695A1 (de) 2011-09-14 2011-09-14 Filtergerät
PCT/EP2012/067983 WO2013037906A1 (fr) 2011-09-14 2012-09-13 Appareil de filtration

Publications (1)

Publication Number Publication Date
EP2755738A1 true EP2755738A1 (fr) 2014-07-23

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ID=46851490

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Application Number Title Priority Date Filing Date
EP12759122.0A Withdrawn EP2755738A1 (fr) 2011-09-14 2012-09-13 Appareil de filtration

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EP (1) EP2755738A1 (fr)
KR (1) KR20140097126A (fr)
DE (1) DE102011082695A1 (fr)
WO (1) WO2013037906A1 (fr)

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Publication number Priority date Publication date Assignee Title
IT201600094356A1 (it) * 2016-09-20 2018-03-20 Sacmi Dispositivo di filtrazione per olio idraulico
CN106823520B (zh) * 2017-02-14 2023-03-24 南京莫尼亚离心机科技发展有限公司 自动活塞式行走过滤设备
CN108325255A (zh) * 2018-03-15 2018-07-27 深圳职业技术学院 自动过滤装置
CN111821744B (zh) * 2019-04-23 2022-05-17 西门子(深圳)磁共振有限公司 用于磁共振装置的水冷却设备

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Publication number Priority date Publication date Assignee Title
GB413677A (en) * 1933-01-14 1934-07-16 Brassert & Co Improvements in and relating to fluid filtering, screening and like apparatus
FR83147E (fr) * 1961-05-12 1964-06-19 Procédé et dispositifs de décolmatage de filtres disposés dans des circuits de fluides fonctionnant sous pression ou sous vide
DE3309787A1 (de) * 1983-03-18 1984-09-20 Maschinenfabrik Karl Brieden & Co, 4630 Bochum Fluessigkeitsfilter
DE8605227U1 (de) * 1986-02-27 1986-07-03 Friedrichs, Dieter, 5143 Wassenberg Rückspülfilter
DE3832679A1 (de) * 1988-09-27 1990-03-29 Boll & Kirch Filter Rueckspuelfilter
AT392217B (de) * 1989-07-18 1991-02-25 Chemiefaser Lenzing Ag Filterapparat zur abtrennung von fest- und schwebstoffen aus fluessigkeiten
DE3934947C2 (de) * 1989-10-20 1996-03-21 Dieter Friedrichs Rückspülfilter
DE19956859A1 (de) * 1999-11-25 2001-06-07 Hydac Filtertechnik Gmbh Rückspülfiltervorrichtung
DE10325525B4 (de) * 2003-06-04 2013-10-24 Boll & Kirch Filterbau Gmbh Rückspülfilter
CN100400895C (zh) * 2005-12-16 2008-07-09 曾祥炜 工作缸的速度控制装置
DE102009009495A1 (de) 2009-02-18 2010-08-19 Mahle International Gmbh Filtergerät

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Title
See references of WO2013037906A1 *

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Publication number Publication date
KR20140097126A (ko) 2014-08-06
DE102011082695A1 (de) 2013-03-14
WO2013037906A1 (fr) 2013-03-21

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