EP3396163A1 - Pompe à vide dotée d'un dispositif de limitation de niveau de lubrifiant - Google Patents

Pompe à vide dotée d'un dispositif de limitation de niveau de lubrifiant Download PDF

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Publication number
EP3396163A1
EP3396163A1 EP17168602.5A EP17168602A EP3396163A1 EP 3396163 A1 EP3396163 A1 EP 3396163A1 EP 17168602 A EP17168602 A EP 17168602A EP 3396163 A1 EP3396163 A1 EP 3396163A1
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EP
European Patent Office
Prior art keywords
chamber
lubricant
vacuum pump
overflow pipe
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17168602.5A
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German (de)
English (en)
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EP3396163B1 (fr
Inventor
Christopher Kobus
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.)
Pfeiffer Vacuum GmbH
Original Assignee
Pfeiffer Vacuum 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 Pfeiffer Vacuum GmbH filed Critical Pfeiffer Vacuum GmbH
Priority to EP17168602.5A priority Critical patent/EP3396163B1/fr
Priority to JP2018082058A priority patent/JP6933602B2/ja
Publication of EP3396163A1 publication Critical patent/EP3396163A1/fr
Application granted granted Critical
Publication of EP3396163B1 publication Critical patent/EP3396163B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/809—Lubricant sump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/24—Level of liquid, e.g. lubricant or cooling liquid

Definitions

  • the present invention relates to a vacuum pump with a chamber in which at least one component of the vacuum pump to be lubricated by means of splash lubrication is arranged.
  • Vacuum pumps may have moving components that need to be lubricated during operation of the vacuum pump. This applies in particular to vacuum pumps which are used in the fore-vacuum region of a vacuum system.
  • Vacuum pumps for the fore-vacuum range are, for example, single-stage or multi-stage Roots pumps, which are also known as Roots pumps or multi-stage Roots pumps, screw pumps, claw pumps, scroll pumps or rotary vane pumps.
  • the components of the vacuum pumps to be lubricated are usually arranged in a chamber in which a lubricant, such as oil, is located.
  • the lubrication of the component of the vacuum pump by means of splash lubrication, in which a portion of the component is immersed in the lubricant, so that the surfaces to be lubricated of the component are wetted, for example, during the rotation with lubricant.
  • a correct level of lubricant be adjusted in the chamber and maintained during operation of the vacuum pump. If the level of the lubricant is too low, there will be insufficient lubrication of the moving component, while if there is an excess of lubricant due to too high a level, for example, rotation of the component will be difficult and thus the operation of the vacuum pump will be impaired. Due to an incorrectly set level of the lubricant in the Chamber can thus shorten the life of the entire vacuum pump, or it can even occur a total failure.
  • a variety of devices are known. For example, piezoelectrically driven vibrating limit switches are used, but they are very expensive.
  • One of the simplest devices is a sight glass, which is arranged in a lateral wall of the lubricant-filled chamber and in which the correct level of the lubricant can be monitored, for example, by means of suitable markings.
  • the surface of the lubricant is not parallel to the bottom of the chamber in which the lubricant is due to gravity. If the sight glass and the component to be lubricated are spaced apart from each other, the actual level of the lubricant in the area of the component deviates from the level indicated in the sight glass due to the inclination of the vacuum pump or chamber. The greater the distance between the component and the sight glass, the greater the deviation between the actual and the displayed level.
  • An object of the invention is to provide a vacuum pump with a low-cost device, with which a lubricant level for a component of the vacuum pump to be lubricated can be adjusted and maintained correctly.
  • a vacuum pump with the features of claim 1 and in particular by the fact that the vacuum pump has a lubricant level-limiting device to limit the level of a lubricant in a chamber in which at least one component of the vacuum pump to be lubricated by splash lubrication is arranged ,
  • the lubricant level-limiting device according to the invention comprises an overflow pipe and a lubricant seal.
  • the overflow tube has a lower and an upper opening projecting into the chamber and is disposed in an opening in a bottom of the chamber. The bottom of the chamber is in the installation position of the vacuum pump below.
  • the lower opening of the overflow pipe can be closed.
  • the upper opening of the overflow pipe is open and the position of the upper opening defines the level of lubricant in the chamber.
  • the upper opening is arranged adjacent to the component to be lubricated. This means that, for example, the distance between the upper opening of the overflow pipe and the component to be lubricated is less than typical dimensions of the component and the overflow pipe, such as a diameter or circumference of the component or a length of the overflow pipe.
  • the level of the lubricant is defined and held exactly where the component to be lubricated is arranged.
  • the lubricant level is thus set correctly by the lubricant level-limiting device even if the vacuum pump is set up with a certain inclination.
  • a projection of a contour of the overflow pipe and a projection of a contour of the at least one component touch or overlap onto at least one plane running perpendicular to the ground.
  • the outlines of the overflow tube and the at least one component touch or intersect in at least one side view of the chamber, i. under at least one angle. Due to the superposition of the projection of the contours, it is ensured that the upper opening of the overflow pipe actually sets the lubricant level in the region of the component and not removed therefrom and that the lubricant level has a sufficient height so that a defined immersion of the component in the lubricant takes place.
  • the distance between the upper opening of the overflow pipe and the bottom of the chamber is greater than the distance between a lower edge of the at least one component and the bottom of the chamber. Since the lower edge of the at least one component is thus arranged below the upper opening of the overflow pipe, it is ensured that for the splash lubrication required immersion of the at least one component in the lubricant takes place.
  • a depth can further be defined to which the at least one component dips into the lubricant.
  • a central axis of the overflow pipe intersects the at least one component. Since the overflow pipe is arranged below the component due to the splash lubrication, in particular an extrapolation or extension of the overflow pipe and its central axis intersect the component. This ensures that at most a slight lateral offset between the overflow pipe and the at least one component occurs and the upper opening of the overflow pipe defines the lubricant level in such a region in which the at least one component is actually arranged.
  • the overflow pipe is formed substantially straight and in particular aligned at right angles to the bottom of the chamber. This design and orientation of the overflow pipe allows this to be produced in a simple manner and inexpensively. Further, when the overflow pipe is oriented at a right angle with respect to the bottom of the chamber, the distance of the upper opening of the overflow pipe corresponds to the lubricant level in the chamber, which is thus easily fixed.
  • the overflow tube preferably has an upper portion which is disposed in the chamber and which comprises the upper opening.
  • the upper portion has a length which is greater than the distance between a lower edge of the at least one component and the bottom of the chamber.
  • the upper opening of the overflow pipe is thus arranged above the lower edge of the at least one component, so that in turn ensures at least a minor immersion of the at least one component in the lubricant is. Further, by the length of the upper portion of the overflow pipe, the lubricant level in the chamber can be appropriately set.
  • the overflow tube has a thread along a central portion which is adapted for engagement with a thread in the bottom of the chamber.
  • This allows a simple and inexpensive mounting of the lubricant level limiting device in the bottom of the chamber.
  • the position of the overflow pipe, in particular the upper opening of the overflow pipe is adjustable in the chamber.
  • the lubricant level-limiting device is usable in various components of the vacuum pump, which require a different depth immersion in the lubricant.
  • manufacturing tolerances can be compensated by means of adjustability.
  • the overflow tube preferably has a lower portion located outside the chamber which includes a stop. Between the stop and a housing of the chamber may further be arranged a spacer element with which the position of the overflow pipe is adjustable. The stop and the spacer thus determine how far the overflow tube protrudes into the chamber.
  • the opening in the bottom of the chamber, in which the overflow pipe is arranged, is preferably located at a lowest point of the bottom.
  • the opening in the bottom of the chamber thus serves not only for mounting the lubricant level limiting device, but also as an outlet opening for the chamber.
  • the lubricant seal is formed by a threaded member engageable with a thread in the lower opening of the overflow tube.
  • the engagement between the threads of the lubricant seal and the lower opening of the overflow tube allows easy and reliable attachment of the lubricant seal to seal the chamber.
  • two components of the vacuum pump to be lubricated by means of splash lubrication are arranged in the chamber, and the overflow pipe is arranged at least in sections between the two components.
  • This arrangement of the overflow tube between the two components establishes a correct lubricant level for both components, as the upper opening of the overflow tube is also between the two components.
  • the chamber preferably has, in addition to the opening in the bottom, which also serves as an outlet opening, an inlet opening whose longitudinal axis is not aligned with a corresponding longitudinal axis of the outlet opening.
  • the inlet and outlet ports are advantageously not directly above one another as viewed from the bottom of the chamber.
  • one or more obstacles or deflection means may be disposed between the inlet and outlet ports. Both alternatives prevent the lubricant from hitting the upper opening of the overflow pipe when filling the chamber.
  • Regardless of the orientation of the chamber further consists in both alternatives preferably at least parallel to the direction of gravity no direct optical line of sight between the inlet and outlet port and the upper opening of the overflow pipe.
  • a distraction or obstruction of the lubricant flow may be a distraction or obstruction of the lubricant flow, for example, by the one or more components to be lubricated or by one or more additional, for For this purpose provided deflecting be achieved, such as by using baffles or by a mounted on the overflow cover.
  • a cover device may for example be formed by one or more cover elements, which may be offset with respect to the longitudinal axis of the overflow pipe, the upper opening of the overflow pipe at least partially cover and are mounted with respective fasteners on the overflow pipe.
  • the end face of the upper end of the overflow pipe can be positively closed or cohesively, and the lateral surface of the overflow pipe can have one or more openings at the level of a desired lubricant level, which act as an upper opening and thus as an overflow.
  • the overflow pipe may have at the edge of such openings projections which, when filling the chamber, past the lubricant flowing past first at the respective opening.
  • a plurality of such lateral openings and protrusions may be disposed at different levels of desired lubricant in the overflow tube, those openings being blocked by closure means below a respective desired level of lubricant.
  • the closure means need not necessarily close completely tight, as any leakage amounts are discharged during filling with lubricant through the overflow pipe and there is no need for complete sealing of the closure means in subsequent operation.
  • a filling aid for filling the lubricant can be arranged in the inlet opening, which has an outlet arranged eccentrically to the inlet opening inside the chamber, for
  • a filler tube similar to the overflow tube that is bent or angled within the chamber to the inlet opening runs and thus deflects the lubricant to be filled laterally into the chamber.
  • a hopper may be provided as an auxiliary element, the front Tüllen Scheme has a bent or less than 90 ° angled Einyogllrohrende, so that a safe, eccentric filling is made possible by the centric insertion of the funnel into the inlet opening.
  • further openings in the chamber may be formed as an outlet opening for receiving the overflow pipe, for example on lateral walls or an upper wall of the chamber.
  • the inlet opening may be designed so that it can also serve as an outlet opening and for receiving the overflow pipe when the vacuum pump is in the opposite direction.
  • the previous outlet opening corresponding to the inlet opening.
  • lubricant level-limiting device can thus be used advantageously at different points of the chamber, wherein in each case different lengths of the overflow pipe can be provided.
  • one or more permanent magnets which in particular have a ring shape, are fastened to the overflow pipe.
  • the permanent magnets can be pushed onto the overflow pipe, clamped to this or glued or screwed with this.
  • ferromagnetic foreign body in the lubricant for example, abrasion or wear particles, collected and removed from a lubricant circuit of the vacuum pump.
  • a section of the overflow pipe For example, the upper portion, or the entire overflow pipe itself consist of an at least partially magnetized material.
  • material all magnetizable materials and permanent magnet materials can be used, for example steel, rare earth magnets such as samarium cobalt or neodymium-iron-boron or even plastic-bonded magnets with magnetic particles or plastic magnets.
  • the outer contour of the overflow pipe has suitable dimensions, so that the overflow pipe can be introduced into the outlet opening.
  • these dimensions are such that the foreign bodies, which adhere to the permanent magnet or the overflow pipe itself, stick to this at a later removal of the overflow pipe and are not stripped on walls or edges of the outlet opening.
  • the chamber or at least the bottom of the chamber in an area around the overflow pipe receiving opening made of a non-magnetic material to better use a overflow pipe with permanent magnet or permanent magnets in the outlet opening and to take out of this and a collection of To ensure ferromagnetic foreign bodies on the overflow pipe and not at the bottom of the chamber.
  • the invention further relates to a method for filling a chamber of a vacuum pump, which in particular has the features described above, with a lubricant. At least one component of the vacuum pump to be lubricated by means of splash lubrication is arranged in the chamber.
  • a lubricant level-limiting device having an overflow tube with upper and lower openings is mounted in an opening in a bottom of the chamber such that the upper one Opening is disposed adjacent to the component to be lubricated. Subsequently, the chamber is filled with lubricant until lubricant runs into the upper opening. Thereafter, a lubricant seal is mounted in the lower opening of the overflow pipe to close the overflow pipe and the chamber.
  • a lubricant level within the chamber is set at a desired position, adjacent to the component to be lubricated.
  • the chamber is therefore filled by means of the method even with an inclined arrangement of the vacuum pump in the region of the component to be lubricated to a desired or required level with lubricant without additional control, for example by means of a sight glass is required.
  • Fig. 1a, 1b and 1c show a portion of a vacuum pump, which is formed in the present example as a Roots pump, according to the prior art in three different mounting positions.
  • the Roots pump is arranged horizontally, that is, that the axis of rotation of its shaft is parallel to the ground.
  • the Roots pump is tilted 3 ° to the left while in Fig. 1c inclined by 3 ° to the right.
  • the illustrated section of the Roots pump comprises a housing 12 with a chamber 11 in which a component of the Roots pump to be lubricated is arranged.
  • This component is in the present example, a gear 13 which is mounted on a shaft 15 of the Roots pump.
  • lubrication of the gear 13 is required because it is in engagement with another gear that in the FIGS. 1a to 1c arranged behind the gear 13 and therefore not shown in the figure.
  • the chamber 11 is a part of the entire Roots pump. Not shown are continuations of the shaft 15 and the housing 12, which extend in the figure to the right. In this part of the Roots pump, not shown, are bearings of the shaft, shaft seals and pump-active components of the Roots pump. In this case, directly adjacent to the chamber 11 storage elements also by a lubricant circuit of the Roots pump, which includes the chamber 11, lubricated become. Depending on the design of the Roots pump, a second chamber 11 may be provided at the other end of the Roots pump to lubricate a further storage and / or transmission unit. This may typically be similar or even nearly identical and mirror-inverted to the chamber shown, but if necessary has an additional aperture in the chamber 11 for coupling at least one drive motor to at least one of the shafts 15.
  • the lubrication of the gear 13 is effected by a splash lubrication, in which a connected to the gear 13 spray plate 17 in a lubricant, such as oil, immersed, with which the chamber 11 is filled to a lubricant level 19.
  • a lubricant such as oil, immersed
  • the lubricant is introduced into the chamber 11 via an inlet opening 21.
  • an outlet opening 23 which is arranged in a bottom 25 of the chamber 11, the lubricant can be discharged from the chamber 11 again.
  • the inlet opening 21 and the outlet opening 23 are closed during operation of the vacuum pump by means of closures 24 and 45, for example oil-sealing screws.
  • the closures 24 and 45 may be of identical or different types.
  • the chamber 11 has a sight glass 27 disposed in a side wall of the chamber 11. If the Roots pump is in a horizontal position, like this one in Fig. 1 a, corresponds to a filling of the chamber 11 with lubricant up to a mark in the sight glass 27, for example in the middle, the correct lubricant level 19, in which an optimal lubrication of the gear 13 takes place.
  • the gear 13 only touches the surface of the lubricant and is wetted mainly by lubricant, which is ejected from the spray disk 17 from the lubricant sump and reaches the gear 13.
  • the chamber 11 is also filled to a mark in the middle of the sight glass 27 with lubricant. Due to the inclination of the Roots pump, however, the lubricant level 19 extends in the region of the gear 13 in Fig. 1b below the gear 13, while the gear 13 in Fig. 1c due to the opposite inclination of the Roots pump immersed in the lubricant, so that the underside of the gear 13 is below the lubricant level 19.
  • Fig. 2 is a section of a vacuum pump according to the invention, in particular Roots pump, shown.
  • the inventive concept can basically be applied to any other devices or pumps / vacuum pumps with splash lubrication.
  • This in turn comprises a chamber 11, in which two components to be lubricated, here also two gears 13, are arranged, which are each attached to a shaft 15 and are engaged with each other.
  • the second gear 13 is in the illustration of Fig. 2 covered by a spray disk 17.
  • the line of sight of the view of Fig. 2 is the line of sight of the views of Fig. 3 and 4 opposite and runs from the imaginary center of the Roots pump in the direction of the inside of the chamber eleventh
  • a lubricant level limiting device 31 is disposed in the Roots pump according to the invention instead of the simple closure 24, the in Fig. 2 in an exploded view and in Fig. 3 to 5 is shown in the assembled state.
  • the lubricant level restricting device 31 includes an overflow pipe 33 having an upper portion 35, a middle portion 37, and a lower portion 39 coaxial with a center axis 40 of the overflow pipe 33.
  • the overflow tube 33 is hollow on the inside and has an upper opening 41 in the upper section 35 and a lower opening 43 in the lower section 39.
  • the lubricant level-limiting device 31 comprises a lubricant closure 45, which may be, for example, a closure screw, as is commonly used for closing the outlet opening 23.
  • the middle portion 37 of the overflow tube 33 and an upper portion of the lubricant seal each have a thread 47, each with a corresponding thread in the bottom 25 of the chamber 11, i. in the outlet port 23, and in the lower portion 39 of the overflow pipe 33 is rotatably engaged to secure the overflow pipe 33 to the housing 12 of the chamber 11 and the lubricant seal 45 at the lower portion 39.
  • a respective seal 49 is arranged, in which it is, for example is an O-ring. Thereby, the discharge port 23 of the chamber 11 is reliably closed after mounting the lubricant level-limiting device 31.
  • the overflow pipe 33 has the largest diameter or cross section, which is greater than the diameter or cross section of the central portion 37, which has the thread 47, and the upper portion 35 of the overflow pipe 33.
  • the lower portion 39 of the overflow tube 33 has a hexagonal shape to facilitate the attachment of the overflow tube 33 in the outlet opening 23.
  • the lower portion 39 of the overflow tube 33 may have a square shape or other complex shape or shape with a textured surface or indentations / elevations.
  • the lower portion 39 of the overflow pipe 33 is also in the assembled state of the lubricant level-limiting device 31, as in Fig. 3 to 5 is shown, arranged outside the chamber 11. Due to the larger diameter or cross-section compared to the upper and middle portions 35, 37 of the overflow pipe 33, the lower portion 39 of the overflow pipe 33 forms a stop on its upper side. This stop determines the distance to which the upper portion 35 of the overflow pipe 33 protrudes into the chamber 11 in the assembled state of the lubricant level-limiting device 31.
  • a spacer for example one or more annular disks, with which the position of the overflow pipe and in particular the position of the upper opening 41 of the overflow pipe 33 is adjustable in the chamber 11 and thus adjustable.
  • the chamber 11 further has in the region of the bottom 25 a lowered portion 51, in which the outlet opening 23 is arranged (see. Fig. 2 ). Thereby, the outlet port 23, in which the overflow pipe 33 and the lubricant level-limiting device 31 are arranged, is at a lowest point of the bottom 25.
  • Fig. 3 is a front view of the chamber 11 is shown with mounted lubricant level limiting device 31, wherein the housing 12 of the chamber 11 is closed. Therefore, the two gears 13, the shafts 15, the spray disk 17 and the inner contour of the chamber 11 are shown in dashed lines. Only a very small section of the interior of the chamber 11 is visible through the sight glass 27. It can be seen that in a horizontal orientation of the Roots pump according to the invention, the upper opening 41 of the overflow pipe 33 and the center of the sight glass 27 relative to the bottom 25 of the chamber 11 are at the same height.
  • Fig. 4 shows a schematic diagram of the in Fig. 2 illustrated portion of the Roots pump in the assembled state.
  • Fig. 3 only the outer contour of the housing 12, two shafts 15 with respective gears 13 and the spray disk 17 and the lubricant-limiting device 31 are shown. It can be seen that the upper opening 41 of the overflow tube 33 of the lubricant restriction device 31 is disposed adjacent to both gears 13 and is located between the two gears 13.
  • Fig. 5 shows a further sectional view of the chamber 11, which runs along the line in Fig. 3 denoted by 5-5.
  • the upper portion 35 of the overflow pipe 33 to the lower edge of the gear 13 in the Chamber 11 protrudes.
  • the distance between the upper opening 35 of the overflow pipe 33 and the bottom 25 of the chamber 11 is greater than the distance between the lower edge of the spray plate 17 and the bottom 25 of the chamber 11.
  • the central axis 40 of the overflow pipe 33 intersects the contour of the gear 13 in extension, that is, in the illustration of Fig. 5 at most a small lateral offset between the lubricant level limiting device 31 and the gear 13 is present.
  • the overflow pipe 33 is in other words in the illustration of Fig. 5 arranged immediately below the gear 13.
  • a lubricant is introduced through the inlet opening 21 into the chamber 11.
  • the lubricant level-limiting device 31 in the region of the lower portion 39 of the overflow pipe 33 is open, that is, that the lubricant seal 45 is initially not disposed in the lower opening 43 of the overflow pipe 33.
  • the chamber 11 is filled with lubricant until the lubricant runs into the upper opening 41 of the overflow pipe 33. If this is the case, the desired lubricant level 19 (cf. Fig. 1 a and 6a), which is required for the lubrication of the two gears 13.
  • the lubricant shutter 45 is mounted in the lower opening 43 of the overflow pipe 33 to close the overflow pipe 33 and the chamber 11.
  • the sight glass 27 serves for additional visual control of the lubricant level 19 and its temporal change and for the assessment of the lubricant turbidity or coloration.
  • Fig. 6a, 6b and 6c show the lubricant-filled chamber 11 in a sectional view, the sectional view of Fig. 5 equivalent. Further, the respective orientations of the chamber 11 correspond to FIG Fig. 6a, 6b and 6c the three different mounting positions of the Roots pump, which for the Roots pump according to the prior art in Fig. 1a, 1b and 1c are shown.
  • Fig. 6a is the Roots pump consequently as well as in Fig. 1 a arranged horizontally while in Fig. 6b like in Fig. 1b 3 ° to the left and in Fig. 6c like in Fig. 1c inclined by 3 ° to the right.
  • the level of lubricant 19 is determined within the chamber 11 through the upper opening 41 of the overflow pipe 33 and is therefore at the same height as the lower edge of the gear 13.
  • the gear 13 immersed at most slightly into the surface of the lubricant.
  • the lubricant level 19 is at an inclination of the chamber 11 to the left above the center of the sight glass 27, while the lubricant level 19 is at an inclination of the chamber 11 to the right below the center of the lubricant level 19. This means that when tilted to the left (cf. Fig. 6b ) in the sight glass 27 a too high lubricant level 19 would be read. Conversely, the chamber 11 would then, if this filled only by monitoring using the sight glass 27 with lubricant would be filled only to a low lubricant level 19, as shown in Fig. 1b is shown.
  • the opening 19 defining the level 19 is arranged in spatial proximity to the components to be wetted with lubricant 13, 17 is thus independent of the installation position or inclination of the Roots pump a correct lubricant level 19 for the Gears 13 set.
  • a sufficient lubrication of the gears 13 is always ensured while excessive lubrication of the gears 13 is avoided due to a too deep immersion in the lubricant. Due to the always correct lubricant level 19 thus the life of the gears 13 and shafts 15 and the Roots pump is prolonged overall.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP17168602.5A 2017-04-28 2017-04-28 Pompe à vide dotée d'un dispositif de limitation de niveau de lubrifiant Active EP3396163B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17168602.5A EP3396163B1 (fr) 2017-04-28 2017-04-28 Pompe à vide dotée d'un dispositif de limitation de niveau de lubrifiant
JP2018082058A JP6933602B2 (ja) 2017-04-28 2018-04-23 潤滑剤水位制限装置を有する真空ポンプ

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Application Number Priority Date Filing Date Title
EP17168602.5A EP3396163B1 (fr) 2017-04-28 2017-04-28 Pompe à vide dotée d'un dispositif de limitation de niveau de lubrifiant

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EP3396163A1 true EP3396163A1 (fr) 2018-10-31
EP3396163B1 EP3396163B1 (fr) 2022-02-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019122942A1 (de) * 2019-08-27 2021-03-04 Volkswagen Aktiengesellschaft Kraftstoffversorgungssystem mit mindestens einer Magnetvorrichtung zur Detektion und Rückhaltung magnetischer Partikel zum Schutz des Systems und seiner Komponenten

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1123076B (de) * 1959-04-18 1962-02-01 Leybolds Nachfolger E Rotierende mechanische Vakuumpumpe
US3785169A (en) * 1972-06-19 1974-01-15 Westinghouse Electric Corp Multiple compressor refrigeration system
US20080008614A1 (en) * 2006-07-07 2008-01-10 Takao Mizuno Horizontal type scroll compressor
EP2952678A1 (fr) * 2014-06-02 2015-12-09 Pfeiffer Vacuum GmbH Pompe à vide avec des ailerons

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5967593U (ja) * 1982-10-27 1984-05-08 三洋電機株式会社 圧縮機のオイル給排装置
JPH03117150U (fr) * 1990-03-14 1991-12-04
JP2002122089A (ja) * 2000-10-17 2002-04-26 Toyota Industries Corp 流体機械における潤滑構造
JP2005226542A (ja) * 2004-02-13 2005-08-25 Toyota Motor Corp 液体排出構造及び液体容器
JP2014152811A (ja) * 2013-02-05 2014-08-25 Toyota Motor Corp 車両のオイル貯留量調整装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1123076B (de) * 1959-04-18 1962-02-01 Leybolds Nachfolger E Rotierende mechanische Vakuumpumpe
US3785169A (en) * 1972-06-19 1974-01-15 Westinghouse Electric Corp Multiple compressor refrigeration system
US20080008614A1 (en) * 2006-07-07 2008-01-10 Takao Mizuno Horizontal type scroll compressor
EP2952678A1 (fr) * 2014-06-02 2015-12-09 Pfeiffer Vacuum GmbH Pompe à vide avec des ailerons

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019122942A1 (de) * 2019-08-27 2021-03-04 Volkswagen Aktiengesellschaft Kraftstoffversorgungssystem mit mindestens einer Magnetvorrichtung zur Detektion und Rückhaltung magnetischer Partikel zum Schutz des Systems und seiner Komponenten
DE102019122942B4 (de) 2019-08-27 2022-12-08 Volkswagen Aktiengesellschaft Kraftstoffversorgungssystem mit mindestens einer Magnetvorrichtung zur Detektion und Rückhaltung magnetischer Partikel zum Schutz des Systems und seiner Komponenten

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JP2018189086A (ja) 2018-11-29
JP6933602B2 (ja) 2021-09-08

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