EP3504008A1 - Vorrichtung zum entfernen von partikeln aus einer arbeitsflüssigkeit einer maschine - Google Patents
Vorrichtung zum entfernen von partikeln aus einer arbeitsflüssigkeit einer maschineInfo
- Publication number
- EP3504008A1 EP3504008A1 EP17761179.5A EP17761179A EP3504008A1 EP 3504008 A1 EP3504008 A1 EP 3504008A1 EP 17761179 A EP17761179 A EP 17761179A EP 3504008 A1 EP3504008 A1 EP 3504008A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- working fluid
- scraper
- rotation
- compressed air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
- B04B3/02—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
Definitions
- the invention relates to an apparatus and a method for removing
- Wet blasting machine a vibratory grinding system, or another device in which a working fluid is contaminated with solids.
- Liquids are known, they are referred to as two-phase centrifuges. Such systems usually have a rotatable about a vertical axis rotor, which is enclosed by a housing. The contaminated with solid particles liquid is introduced into the rotating rotor, wherein the solid particles deposit because of their higher density compared to the liquid on the inside of the rotor and form a crust there, which must be removed periodically.
- a device is known, for example, from WO 2011/110432 A2.
- the device should enable a simplified, cost-effective cleaning of the rotor. Among other things, such simplified cleaning can also be automated for devices with low power. Further advantages of the present
- a device for removing particles from a working fluid of a machine comprising: a rotor rotatable about a rotation axis, in particular in the form of a bell; a motor for driving the rotor; an inlet for the particle-contaminated working fluid from the engine i the rotor; an outlet for cleaned working fluid from the rotor; and a scraper movable (for example, pneumatically) parallel to the axis of rotation along the inside of the rotor for removing particles deposited on the inside of the rotor.
- a method for removing particles from a working fluid of a machine, in particular an industrial machine, by means of a device disclosed in this document.
- the method comprises the following steps: rotating the rotor by means of the motor about the axis of rotation; Removal of contaminated working fluid from the machine, in particular from a liquid circuit of the machine; Introducing the contaminated working fluid via the inlet into the rotor, preferably to the lowest area of the inside of the rotating rotor; wherein the working fluid moves along the inside of the rotor to the outlet and the particles meanwhile deposit on the inside of the rotor, whereby a purified working fluid is formed; Discharging the cleaned working fluid via the spout from the rotor; preferably recycling the cleaned working fluid into the machine, in particular in the liquid circuit of the machine; Moving the scraper parallel to the axis of rotation along the inside of the rotor, whereby the deposited on the inside of the rotor particles are removed, in particular scraped.
- the device should be able to operate with minimal maintenance, which is simplified if the removal of the deposited particles from the rotor
- the device is also suitable for cleaning the working fluid of other machines, such as grinding machines (in particular
- Vibratory grinding machines or any other machines which are designed to carry out work processes in which a contamination of a working fluid with solid particles takes place.
- the working liquid is preferably a recirculated liquid and / or a liquid which is repeatedly contaminated with particles in the machine and cleaned by the apparatus disclosed in this document.
- the working fluid may advantageously be water, for example water in its pure form, or water with, the working process affecting, liquid additives.
- the particles to be removed from the working fluid are preferably solid particles, such as, for example, blasting abrasives and / or abrasives and / or abrasive residues and / or workpiece abrasions and / or metal particles (for example steel particles), wherein the particles in the
- Working fluid in total, for example, at least 80, 90 or 95
- Weight percent may consist of one or more of the aforementioned types of particles.
- the device has a rotatable about a rotation axis, in particular bell-shaped rotor with an inner side of the rotor.
- the device For driving the rotor and / or for rotating the rotor about the rotation axis, the device has a motor.
- a scraper engages laterally. In order to generate sufficient torque during the slow rotational movement of the rotor during stripping, but a substantial over-dimensioning of the motor is required. Because in the device proposed in this document, the movement of the scraper is preferably not carried out by means of the described motor and / or the motor is used only for the rotation of the rotor during the operating state of the device, the use of less expensive motors is possible.
- the motor may be designed with variable speed and / or it may be operated at a speed of preferably 2000 to 4000 revolutions per minute. But there are certainly higher or lower speeds possible.
- the motor drives the rotor via a V-belt or a belt.
- a V-belt or a belt.
- the device is used to remove particles from a working fluid of a machine.
- the disclosed method provides that contaminated working fluid is removed from the machine, in particular from a fluid circuit of the machine.
- 1, 2, 3, 4 or more machines are disclosed. It can namely be provided that the device is connected instead of only one machine with several machines. In this case, the
- Working fluids of the machine preferably cleaned together through the device.
- a cleaning device is usually required for each blasting machine in order to be able to control the mixing ratio.
- a cleaning device can certainly be used for several vibratory finishing systems.
- the device is designed for a working fluid flow of 200 to 400 liters per hour (in total or per connected machine). But there are also other sizes conceivable.
- the rotor may be fixed to a shaft for driving by the motor.
- the rotor may be connected to the shaft at a first end. Then it is advantageous if the shaft is connected to the motor via the V-belt or belt described above.
- the rotation axis is usefully aligned vertically. This is advantageous both for the normal operation (operating state) and for the cleaning (cleaning state) of the device.
- the mentioned first end of the rotor may in this case be the upper end and the second end may be the lower end of the rotor.
- Contaminated working fluid is directed via the inlet to the inside of the rotor.
- the contaminated working fluid spreads on the inside of the rotor and forms a substantially tubular or annular mass (hereinafter referred to as "liquid ring") Rotation axis facing away from the outside of the liquid ring and the axis of rotation
- the outside of the liquid ring is in contact with the inside of the rotor and thus has their Shape.
- the inside of the liquid ring is circular cylindrical. Due to the constant distance of the inside of the liquid ring from the axis of rotation, the height of the working fluid is defined. Within the liquid ring, there is a flow from the inlet to the outlet. If the rotor is arranged vertically with the inlet at the bottom and the outlet at the upper end of the rotor, the working fluid rises along the inside of the rotor.
- the inlet and the drain are advantageous
- one or more openings for the discharge of the cleaned working fluid are arranged at the first end of the rotor, wherein it is preferred if the rotor has a plurality of such openings, which are arranged at the same distance from the axis of rotation and / or from adjacent openings (eg the corners of an equilateral polygon).
- the arrangement of the openings defines the maximum height of the working fluid in the rotor, i. the closer to the
- the axis of rotation are the openings, the more working fluid can hold the rotor.
- a maximum height of the working fluid of 20 to 40 millimeters makes sense.
- a locking flange is arranged, which prevents the leakage of the working fluid.
- the locking flange is expediently (for example, about 5 millimeters) higher than the maximum height of the working fluid in the rotor.
- the second end of the rotor can be open.
- the rotor can be arranged in a housing, wherein then preferably also the scraper and optionally the annular channel described below are arranged in the housing.
- the housing has an opening for removing the particles from the device.
- the opening may advantageously be arranged on the underside of the housing and / or underneath the rotor, so that the particles removed from the rotor by the wiper can fall through the opening (for example into a collection container located below the device).
- the opening in the housing can be closed by means of a closure (for example in the form of a drawer or a slide), the closure optionally having a drain for discharging working fluid flowing out of the rotor and / or from the rotor into the machine
- the inlet is conveniently located at the second end of the rotor. It can be directed towards the inside of the rotor and / or in Direction of the first end of the rotor to be directed. Preferably both are the case, ie the inlet is directed obliquely on the inside.
- the inlet can be arranged (completely or partially) inside or outside the rotor.
- the amount of liquid that can be processed is related to the size of the rotor.
- the rotor may, for example, have a diameter and / or a length of 200 to 300 millimeters. With a rotor of, for example, 250 mm diameter and 250 mm height can be processed about 300 liters per hour. In such a rotor are permanently in the operating state about 4 liters of working fluid. For larger services it needs a corresponding
- the device has an outlet for cleaned working fluid from the rotor, which is expediently arranged at the first end of the rotor
- the outlet may advantageously comprise 1, 2, 3, 4 or more openings at the first end of the rotor (in particular in the frontal wall) a distance from the inside of the rotor of at least 10, 20 or 30 millimeters and / or at most 60, 50 or 40 millimeters can be arranged.
- the device has a rotor circulating annular channel for purified working fluid, in which the purified working fluid is collected, wherein the annular channel a ring channel outlet for cleaned
- Working fluid which preferably passes the purified working fluid in the optional buffer container described below.
- the cleaned working fluid can be routed directly from the outlet (preferably via the annular channel) back into the machine. This would be possible, for example, in wet blasting systems and other processing machines. For certain applications, such as when the cleaned working fluid is being rinsed
- the device has a buffer tank into which the cleaned working fluid is passed before it is returned to the machine. This is useful if also during the cleaning state of the device cleaned working fluid must be available for the operation of the machine.
- the buffer tank should therefore at least during the cleaning state of the device of the
- the buffer tank is equipped with a pump which is adapted to promote purified working fluid from the buffer tank back to the machine.
- the device is characterized in that the rotor and / or the shaft are movable transversely to the axis of rotation (for example by at least 1, 2 or 3 millimeters and / or at most 15 or 10 millimeters), wherein the
- Movement by spring elements and / or damping elements is damped to counteract an imbalance.
- the spring elements and / or damping elements counteract the movement transverse to the axis of rotation and thus compensate for an imbalance.
- the inside of the rotor serves to receive the particles which are deposited by the rotation of the rotor and / or by the centrifugation of the contaminated working fluid caused thereby and form a layer on the inside of the rotor. It can be provided that the particles deposited on the inside of the rotor are removed by means of the scraper when the layer thickness (in particular the middle one) is removed
- Layer thickness is at least 2 millimeters and / or at most 10 millimeters. Since the layer thickness of the particles may be uneven along the direction of movement of the scraper when the projections described below are provided, the layer thickness at the thickest point may well be 2 centimeters or more.
- the rotor is coated on the inside. This coating is part of the device (not to be confused with the previously described
- the coating at the ends of the rotor may additionally extend (for example at least 1 or 2 and / or at most 10 or 5 centimeters) in the direction of the axis of rotation and cover, for example, the inside of the described barrier flanges.
- the coating is advantageously softer than said inner side and / or as the rotor wall, said inner side and / or the rotor wall preferably being made of metal (e.g., steel or aluminum).
- the coating consists of a polymer, in particular polyurethane.
- the coating may, for example, have a thickness of at least 0.5 or 1 millimeter and / or at most 5 or 3 millimeters.
- the scraper may be made of a material that is equal to hard or harder than the coating and / or the scraper may be made of metal (eg steel or aluminum) or of a polymer (eg polyamide ) be made.
- the coating simplifies cleaning.
- the device can be produced much cheaper because the scraper and the rotor must be made less accurate.
- the scraper Since the scraper is moved relative to the rotor parallel to the axis of rotation (preferably with or without simultaneous rotation of the scraper about the axis of rotation and / or without simultaneous rotation of the rotor about the axis of rotation), it makes sense, although the parts to be cleaned inside the rotor are aligned parallel to the axis of rotation.
- the rotor and / or its inside can be in cross section
- cylindrical in particular circular cylindrical or prismatic (hexagonal or octagonal, for example) may be formed.
- the inside is mentioned, then preferably the inside of the rotor shell and / or it should be the above, to be cleaned by means of the scraper parts of the inside of the rotor meant.
- at least this inner side is coated as described above.
- the cleaning of the rotor requires only one movement of the scraper relative to the rotor parallel to the axis of rotation (from the starting position to the end position of the scraper and / or from the first end to the second end of the rotor).
- At least 70, 80 or 90 percent of the particles located on the inside of the rotor or deposited there since the last cleaning can be removed by such a movement of the scraper.
- the stripping he has expediently in cross section to the right
- Rotational axis an outer shape (and / or an outer contour and / or an outer diameter), which of the inner shape (and / or the inner contour and / or the inner diameter) of the rotor (in particular the inside of the rotor) equivalent. So if the rotor z. B. is hollow cylindrical, so the scraper in
- Scraper corresponds substantially to the inner diameter of the rotor.
- the scraper is advantageously performed without play in the rotor substantially and / or the distance between the scraper and the inside of the rotor and / or between scraper and coating is less than 1 millimeter.
- openings for the passage of the cleaned working fluid are arranged on the scraper.
- the openings are advantageously positioned at a distance from the inside of the rotor, this distance
- the openings arranged at the first end of the rotor for the discharge of the cleaned working fluid is the openings arranged at the first end of the rotor for the discharge of the cleaned working fluid.
- the scraper is for removing (especially for scraping) on the
- the scraper can also be arranged in the operating state of the device in the rotor, so that it does not have to be first introduced into the rotor to remove the particles.
- the scraper can rotate according to a variant during the operating state of the device together with the rotor.
- the scraper is movable vertically along the inside of the rotor from the starting position of the scraper at the upper end of the rotor to the end position of the scraper at the lower end of the rotor.
- the rotor has on the inside one, two, three, four or more elevations (preferably in the form of lamellae), wherein it is preferred if the rotor has several such elevations which are equidistant from adjacent elevations (FIG. for example, through the corners of an equilateral polygon with center axis of rotation extending) are arranged.
- the elevations rise above the inside of the rotor and / or run along the inside of the rotor. Conveniently, the elevations run parallel to the trajectory of the
- the elevations may optionally also be coated (as described for the inside of the rotor).
- the elevations stabilize the working fluid in the rotor. This is both when starting the Vorrichtun advantage as well as stopping the rotation and improves the separation of the particles from the working fluid, because the working fluid moves less and thus stirs up fewer particles.
- the elevations may advantageously rise at least 15 millimeters and / or at most 35 millimeters over the inside of the rotor (height of the elevations).
- the elevations may have a height which
- the maximum height of the working fluid in the rotor i.e., the maximum distance of the surface of the working fluid which is the inside of that described above
- Liquid rings corresponds, from the inside of the rotor).
- the elevations may advantageously extend substantially from the starting position of the scraper to the end position of the scraper.
- the scraper moves in its movement from the starting position to the end position along the elevations.
- the scraper can have recesses for receiving the elevations, so that it can be moved over the elevations and / or past the elevations during the removal of the particles deposited on the inside of the rotor.
- the movement of the scraper parallel to the axis of rotation and / or along the inside of the rotor can take place, for example, in the manner of a screw movement, but the movement preferably takes place in the manner of a translation.
- the piston rod may be designed to be movable, for example by means of compressed air, wherein it is preferred if it is provided for this purpose at its, the rotor remote from the end with a sealing element.
- the shaft When the rotor is mounted on a shaft (see above), the shaft may be hollow, thereby allowing the piston rod to be movably mounted in the shaft and relative to the shaft.
- Compressed air inlet be arranged. Compressed air fed into the shaft via the compressed air can in the above-mentioned case the rod and thus the scraper
- the piston rod can also be designed to be movable in the opposite direction by means of compressed air.
- compressed air conducted into the interior of the shaft via a second compressed air inlet can move the piston rod and thus the wiper (in particular from the end position to the starting position) parallel to the axis of rotation.
- the second compressed air inlet can likewise be arranged on the shaft, in particular laterally of the shaft and / or in the region of the end of the shaft facing the rotor.
- Compressed air connection for connecting a compressed air line and between the
- Compressed air connection and the opening in which compressed air is to be given (that is, for example, the end opening of the shaft or a side opening in the shaft), an elastic membrane with a hole.
- the membrane is at a distance (for example, at least 2 millimeters and / or at most 5 millimeters) from the opening before the application of compressed air with compressed air, the membrane is designed to be pressed when exposed to compressed air in the direction of the opening and sealed with cooperate with the edge of the opening, so that over the hole in the membrane, a connection of the compressed air connection with the space to be supplied to the compressed air (ie, for example, the interior of the shaft) is made.
- the opening into which compressed air is to be added may optionally be surrounded by one or more (e.g., annular) ridges, especially when the opening is in a flat device part, as this improves the seal formed by the membrane and the rim of the opening.
- a second compressed air inlet is provided laterally on the shaft in order to be able to move the piston rod in the opposite direction by means of compressed air (see above).
- compressed air is introduced more quickly via the compressed air connection and / or the membrane is subjected to compressed air more quickly than the compressed air can escape via the hole in the membrane, so that the membrane is pressed in the direction of the opening as described.
- the hole in the membrane may be smaller than 3 millimeters in diameter for this purpose.
- Operating state and cleaning state preferably alternate several times.
- the movement of the scraper during the operating state takes place (for this example, an opening could be opened on or adjacent to the inside of the rotor, whereby the working fluid would be removed from the rotor), it is preferred the rotation of the rotor is stopped, the Movement of the scraper parallel to the axis of rotation along the inside of the rotor takes place while the rotor is stationary. In comparison with known systems, this allows a much less expensive construction of the device.
- the working fluid contained in the rotor is removed before the particles are removed by means of the scraper ers from the inside of the rotor. The easiest way to do this is by stopping the rotation of the rotor, with the liquid ring falling out of the rotor.
- the rotation of the rotor is stopped, wherein the working fluid contained in the rotor (preferably without further purification) is fed back into the liquid circuit of the machine and wherein then the stripping it is moved parallel to the axis of rotation along the inside of the rotor and so on of the
- the apparatus may include a buffer container described above, from which the working fluid can be supplied to the machine when the apparatus is being cleaned.
- the buffer tank may be provided with cleaned working fluid with a level probe which can signal a possible malfunction to ensure uninterrupted supply of the machine.
- Actions disclosed in the form of aptitudes, capabilities, characteristics or functions of the device (or parts thereof) described in this document are also disclosed (independently and in any combination) as method steps of the method, depending and independent of the corresponding one Device or the corresponding device part.
- the disclosed apparatus or device parts may include means that may include one or more of those disclosed in connection with U.S. Pat
- FIG. 1 shows a device in the operating state in longitudinal section from the side.
- Fig. 2 shows the device of Fig.l when changing between operating state
- FIG. 3 shows the device from FIG. 1 in the cleaning state
- FIG. 4 shows a detail of FIG. 1 (rotating group) with the scraper in the
- FIG. 6 shows the rotor of the device from Fig.l in cross-section from below.
- FIG. 7 shows the device from Fig.l in longitudinal section from the front.
- Fig. 8 shows a variant of the device according to Fig.l with additional lateral
- FIG. 9 shows two sections from FIG. 8 (second compressed air inlet).
- the device is inter alia for removing particles from a
- wet blasting or a vibratory finishing suitable In a wet blast machine, the cleaned working fluid is used primarily for rinsing the blasted workpieces, and in the case of a vibratory grinding machine, it is process water that flows continuously into the work process and exits with a load of particles. For blasting machines, this must be
- the device has a rotor 5, which is fastened to a shaft 6 at a first, upper end and is mounted rotatably about a rotation axis 37.
- the rotor 5 is driven by means of a motor 8, which is coupled via a V-belt 24 with the shaft 6.
- a scraper 21 is provided, which is axially movable along the rotor 5 for removing particles deposited in the rotor.
- the means of the engine 8 driven rotor 5 forms part of a centrifuge and the separation of the particles 39 from the working fluid 38 by centrifugation is as follows:
- Fig. 1 illustrates the operating state of the device.
- the deflecting 2 is driven by an air cylinder 11 under the rotor 5 and thus serves as a backup that can not be accessed from below into the danger area.
- the valve 12 for the supply of contaminated working fluid 38 is open and via the connecting hose 14, the working fluid flows to the inlet 13, which as
- Injection nozzle 13 is formed, and from there into the rotor 5.
- the delivery of the contaminated working fluid is done externally, either via the system pressure of the connected machine (for example, a wet jet system) or by a pump (for example, in a vibratory finishing or older blasting equipment).
- the motor 8 is turned on, whereby the rotating group (rotor 5, scraper 21, shaft 6) is in rotation.
- the rotor 5 is filled up to the arranged at the upper end of the rotor 5, a discharge for the purified working fluid forming openings 40.
- contaminated working fluid 38 flows, it flows up in purified form from the rotor 5 and in the annular channel 42, which surrounds the rotor 5, collected.
- the purified working fluid 38 flows into the container 4, which serves as a buffer.
- the cleaned working tsflü ssigkei 1 38 either continuously or intermittently from the container 4 back into the fluid circuit of the connected machine.
- the flow through the rotor 5 is preferably constant (for example, controllable by the pressure of the working fluid or the nozzle bore at the inlet 13 or through an orifice plate) and may advantageously be higher than the mean flow from the device back into the engine.
- the container 4 can be filled during the operating state for the cleaning operation.
- the container 4 is provided with an overflow 43. Unused purified working fluid can be returned, for example, in the liquid circuit of the machine.
- Cleaning state depends on the degree of contamination of the contaminated working fluid. This can usually be one or more hours.
- the scraper 21 used for the removal of the particles 39 is in its
- the scraper 21 is formed in this example by a substantially circular disk-shaped plate, it has openings 41 through which the working fluid to the outlet, ie reach the openings 40 in the rotor can.
- the openings 40 and 41 may be arranged at substantially the same distance from the inside of the rotor and / or from the axis of rotation 37.
- Fig. 2 explains the change between the operating state and the cleaning state, i. the initiation of the cleaning process.
- the dirty working fluid supply valve 12 is closed and the rotor 5 rotates e.g. for about 1 min. Without further supply of working fluid 38 into the rotor 5.
- the solidification of the particles 39 is favored to a particle layer and minimizes the amount of particles in the still located in the rotor 5 working fluid 38.
- the motor 8 is turned off.
- the working fluid 38 remaining in the rotor 5 falls from the rotor 5 into the deflector 2 arranged underneath (i.e., in a closed position) and is guided by the latter into a lowered area of the device base 1. From here, this working fluid, which has not been completely cleaned, returns via an outlet 16 back into the liquid circuit of the machine (i.e., for example, a wet blasting machine or into the water jet)
- Deflection shell 2 is moved to the left-hand position (open position) and thus releases the opening under the rotor 5 for the next step.
- Fig. 3 shows the actual cleaning process, i. the device in the
- the rod 28 is formed by compressed air along the axis of rotation 37 movable, which is why a piston seal 30 a of the rod 28 is provided.
- the compressed air supply into the shaft 6 preferably takes place via a special compressed air inlet 32 (cf., in particular, also FIG.
- Connection 44 for a compressed air line and an elastic membrane 35 (for example made of rubber) having a hole 45 has.
- the membrane 35 may be received between, for example, a perforated base 33 and a retaining ring 34.
- the holder of the membrane 35 can also be designed in another way.
- the upper and lower layers i. the starting position and the end position of the scraper 21 are controlled.
- the process can also be controlled in time or in another way.
- the scraper 21 moves from the home position at the first end of the rotor 5 to the end position at the opposite second end of the rotor 5, it scraps off the particulates 39 deposited on the inside of the rotor 5 during the operating state of the device. Because of the deflection shell 2 located in the open position, the scraped-off particles 39 can fall directly from the rotor 5 into the collecting container 3. After reaching the
- the Fig.4 shows above all details of storage, which serves to ensure that the system adjusts itself and any imbalance is compensated.
- the shaft 6 is installed with play in the sleeve of the bearing 7.
- the tubular shaft 6 is centered on the one hand by rubber elements 25 and axially fixed by clamping rings 31. The weight of the rotating group is thereby absorbed by the upper rubber element 25.
- a washer 48 preferably made of plastic may be provided between the rotor 5 and the resilient elements 27. It has a central opening which, for example, has a diameter which is 6 to 8 millimeters larger than the shaft 6. The disk 48 permits the compensation of minor disturbances in the balance of the system because of the somewhat larger opening. It does not serve in the sense of
- FIG. 5 shows above all details and function of the compressed air supply, which have already been described in connection with Figure 3.
- Position "A” prevails in the operating state of the device Between the rotating shaft 6 and the diaphragm 35 there is an air gap of, for example, about 3 to 5 millimeters, which is sufficiently narrow to be bridged by the membrane 35 which expands when exposed to air In the state of contact when the rotor 5 rotates, the diaphragm 35 thus does not touch the shaft 6.
- Position "B” prevails in the cleaning state of the device when the rotor 5 stops. The membrane is then placed sealingly on the end face of the shaft 6. It is a very simple, reliable and wear-free method to supply the compressed air into the shaft 6 during the cleaning process.
- Fig. 6 shows a cross section through the rotor 5, with a view from bottom to top of the scraper 21.
- the arranged flush with the inside of the rotor 5 slats 36 are visible.
- These are special in that their use would not be possible with today's cleaning systems. They serve to stabilize the working fluid 38 in the rotor 5 and thus allow a simpler start-up of the rotor and less imbalance when braking the rotor.
- the inner surface of the working fluid ring has, for example
- the scraper 21 can be inserted into the rotor 5, it may be divided in the middle or matching recesses on the edge for receiving the slats 36th exhibit.
- the illustrated ring of working fluid is about 25 millimeters thick. Its thickness can be determined on the one hand by the height of the locking flange or the diameter of the opening at the lower end of the rotor 5 and on the other by the position of the openings 41 in the scraper 21 and the openings 40 not shown in Figure 6 at the upper end of the rotor 5, which form the outlet.
- Fig. 7 shows above all the support of the compressed air inlet 32 (here on the
- Base plate 33 on the plate 26 which carries the motor 8 and the bearing 7.
- FIGS 8 and 9 show an optional part of the device (second compressed air inlet 32).
- the spring 29 serves, as described, for moving the scraper 21 out of its
- the spring 29 may have the function of keeping the Abs 21 in the upper position (ie in the starting position) during the operating state of the device, although this would of course be otherwise solvable, for example by means of a holder for the scraper, it snaps.
- the optional part of the device shown for the first time in FIGS. 8 and 9 can replace or support the return of the wiper 21 by means of the spring 29.
- the operating principle is the same as in the first shown in the other figures
- Compressed air inlet 32 which is why the same for the second compressed air inlet 32
- An elastic membrane 35 here in the form of a supported hose, surrounds the shaft 6 at a distance, so that the shaft 6 can oscillate freely in operation with the rotor 5 mounted thereon to a possible
- the membrane 35 may be, for example, a thin-walled
- the membrane 35 at the second compressed air inlet 32 is again clamped between two rigid parts, here in the form of a base ring 33 and two retaining rings 34.
- the compressed air connection 44 can be attached to the rigid parts.
- the base ring 33 may be, for example, a steel tube with a tube welded thereto as a compressed air connection 44 for the air supply. With this pipe connection, the compressed air inlet 32 can also be held in the correct position. At the two ends of the steel tube becomes the tubular
- the retaining rings 34 used for the mounting and sealing can be, for example, commercially available hose clamps as shown.
- the membrane 35 provided with a hole 45 can be acted upon with compressed air, expands in the direction of the shaft 6, comes into contact with the shaft 6 and cooperates sealingly therewith.
- the shaft 6 has two sealing elements in the form of O-rings 47 which are arranged laterally of the opening 46 leading into the interior of the shaft 6. Through the annulus, which is formed by the two O-rings 47 and the air-tight fitting diaphragm 35, the air reaches the opening 46 in the shaft 6.
- the drawn lateral opening 46 of the tubular shaft 6 serves in this example, the escape of Air below the piston seal 30 during the movement of the rod 28 during the
- two three-way valves may advantageously be provided, since in the operating state both the membrane 35 of the upper compressed air inlet 32 and the tubular membrane 35 of the lateral compressed air inlet 32 should be depressurized.
- a four-way valve could alternatively supply one of the compressed air inlets 32 with compressed air.
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Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01095/16A CH712836A1 (de) | 2016-08-26 | 2016-08-26 | Vorrichtung zum Entfernen von Partikeln aus einer Arbeitsflüssigkeit einer Maschine. |
CH512017 | 2017-01-16 | ||
PCT/CH2017/000078 WO2018035620A1 (de) | 2016-08-26 | 2017-08-25 | Vorrichtung zum entfernen von partikeln aus einer arbeitsflüssigkeit einer maschine |
Publications (1)
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EP3504008A1 true EP3504008A1 (de) | 2019-07-03 |
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EP17761179.5A Withdrawn EP3504008A1 (de) | 2016-08-26 | 2017-08-25 | Vorrichtung zum entfernen von partikeln aus einer arbeitsflüssigkeit einer maschine |
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WO (1) | WO2018035620A1 (de) |
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JP7132899B2 (ja) * | 2019-09-19 | 2022-09-07 | パナソニックホールディングス株式会社 | 使用済み紙おむつ処理装置 |
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US1944391A (en) * | 1930-06-05 | 1934-01-23 | Altpeter Ludwig | Centrifugal |
GB2478578A (en) | 2010-03-11 | 2011-09-14 | Mann & Hummel Gmbh | Centrifugal separator with protected bearing |
JP5127908B2 (ja) * | 2010-11-17 | 2013-01-23 | 株式会社松本機械製作所 | 遠心分離機 |
ES2424272B1 (es) * | 2013-07-23 | 2014-01-29 | Riera Nadeu, S.A. | Supercentrífuga con dispositivo no intrusivo de extracción de sólido y procedimiento de extracción del mismo |
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2017
- 2017-08-25 EP EP17761179.5A patent/EP3504008A1/de not_active Withdrawn
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WO2018035620A1 (de) | 2018-03-01 |
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