US20060182642A1 - Protection device for intake pipes of lubricating coolant pumps - Google Patents
Protection device for intake pipes of lubricating coolant pumps Download PDFInfo
- Publication number
- US20060182642A1 US20060182642A1 US11/348,758 US34875806A US2006182642A1 US 20060182642 A1 US20060182642 A1 US 20060182642A1 US 34875806 A US34875806 A US 34875806A US 2006182642 A1 US2006182642 A1 US 2006182642A1
- Authority
- US
- United States
- Prior art keywords
- intake pipe
- protective pot
- lubricating coolant
- intake
- lid
- 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.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Abstract
A protective pot, adapted to be mounted to a mouth of an intake pipe of a lubricating coolant pump for a machine tool, includes a closed bottom, a closed peripheral wall and at least one suction window arranged at a distance above the bottom.
Description
- The present application relates, according to claim 1, to a protective pot which is adapted to be fastened to the mouth of an intake pipe of a lubricating coolant pump for machine tools.
- Such a protective pot is known from DE 1 240 718 C (see suction basket 3 in FIG. 1), but is not described in detail.
- From DE 90 00 713 U1, further, a protection device against intake of dirt particles has become known, which is adapted to be mounted to the mouth of an intake pipe of a lubricating coolant pump for machine tools, wherein a liquid collector pot is shaped to provide a distance between the intake openings and the bottom of the reservoir, so that deposits on the bottom are prevented from being sucked in.
- The construction according to the present claim 1 differs from this in that the pot-shaped protection device has a closed peripheral wall and at least one suction window in a distance above the bottom.
- A protective pot for the mouth of an intake pipe with a partly closed peripheral wall has become known from DE 28 47 607 A1. However, there, the intake openings are arranged directly at the bottom, which involves the risk that deposits are sucked in. A prior art that would be closer to the invention has not been found, and since the cited prior art does not suggest the construction as indicated in claim 1, the grant of a patent can be promised.
- The further claims 2 to 8 are also allowable, an amendment being necessary only in claim 8, as shown in the Annex.
- In the introductory part of the description, the prior art according to the citations will have to be discussed. A reference to DE 198 05 411 C2 is not necessary, because this document does not disclose a protection device according to claimed species.
- Clean copies of the amended sheets will have to be filed. With the present documents, the grant of a patent is not yet possible.
- The invention relates to lubricating coolant pumps for machine tools, comprising an intake pipe that is immersed in a lubricating coolant reservoir.
- In machine tools, the tools and the workpieces are cooled and lubricated during the machining processes by means of a lubricating coolant emulsion or an oil. The emulsion dripping off from the tool and the workpiece is collected, filtered and stored in a lubricating coolant reservoir that is typically arranged in the machine bed and from which the emulsion is sucked by means of the lubricating coolant pump and is conveyed again to the working area of the machine, so that a closed lubricating coolant circuit is formed.
- Since the lubricating coolant emulsion frequently contains abrasive contaminants such as metal chips and the like, lubricating coolant pumps are in many cases configured as centrifugal pumps.
- DE 198 05 411 C2 discloses a lubricating coolant pump for machine tools, comprising a conveyor screw that is arranged in the intake pipe. Because of the very low mechanical strain on the pumped liquid, this pump is particularly suited for modern lubricating coolant emulsions which have a strong foaming tendency.
- In view of an increased technical use of silicon carbide, one is increasingly confronted with the problem to pump lubricating coolant emulsions that are contaminated with particles of silicon carbide. However, because of its high hardness, silicon carbide leads to an increased wear of the lubricating coolant pumps.
- It is therefore an object of the invention to provide a device that permits to establish, e.g., by means of a screw pump, a lubricating coolant circuit that is less sensitive to silicon carbide particles contained in the lubricating coolant emulsion.
- According to the invention, this object is achieved by a protective pot that is adapted to be mounted to the mouth of an intake pipe of a lubricating coolant pump for machine tools. The protective pot has a closed bottom, a closed peripheral wall and at least one suction window arranged in a distance above the bottom. The suction window is for example formed in the peripheral wall.
- The invention further provides an intake pipe for a lubricating coolant pump for machine tools, having such a protective pot mounted to one end of the intake pipe.
- In particular, the invention provides an intake pipe for a lubricating coolant pump for machine tools, having such a protective pot, which is arranged at a lower end of the intake pipe, wherein an opening of the intake pipe is arranged inside of the protective pot. Preferably, the opening of the intake pipe is arranged below the at least one window.
- Another subject of the invention is a lubricating coolant pump for machine tools, having such an intake pipe with protective pot. For example, the intake pipe is immersed with its protective pot in a lubricating coolant reservoir.
- The protective pot according to the invention prevents that the opening of the intake pipe arranged in the protective pot is positioned directly above the bottom of the lubricating coolant reservoir. The bottom of the protective pot is arranged between the opening of the intake pipe and the bottom of the lubricating coolant reservoir. The upwardly projecting closed wall of the protective pot assures that chips, silicon carbide particles or other contaminants that accumulate on the bottom of the lubricating coolant reservoir will not or to a strongly reduced extent enter into the interior of the protective pot and hence into the intake pipe. This helps to significantly reduce the wear of the lubricating coolant pump.
- In a conventional device having an intake pipe or an intake neck of a lubricating coolant pump, it is necessary for minimizing the intake of chips and other contaminants, to arrange the opening of the intake pipe or intake neck in a certain distance, e.g. several centimeters, above the bottom of the lubricating coolant reservoir. The deeper the intake pipe or the intake neck is immersed into the lubricating coolant reservoir, the more likely will chips or other contaminants be sucked in. On the other hand, the larger the distance between the intake opening and the bottom of the lubricating coolant reservoir, the larger is the amount of lubricating coolant emulsion that is necessary for assuring a sufficient fill level of the lubricating coolant reservoir. Thus, it is a complex task to mount the lubricating coolant pump. Moreover, a too little height of the intake pipe above the bottom of the lubricating coolant reservoir will be revealed only by an increased wear of the pump. Then, however, the damage has occurred already.
- These drawbacks are efficiently avoided by the solution according to the invention.
- Useful embodiments of the invention are indicated in the dependent claims.
- Preferably, the wall of the protective pot is essentially cylindrical. It may however also be rounded, for example, in the lower part or may form a half sphere together with the bottom.
- In a preferred embodiment, a lid is arranged above the at least one suction window. When the level of lubricating coolant emulsion in the lubricating coolant reservoir is close above the protective pot, the lid serves to prevent an air funnel from being formed due to the suction action of the pump.
- Preferably, the at least one suction window is arranged in the wall, e.g. in the top part of the wall, and extends up to the lid.
- Preferably, the protective pot has at least one sleeve for attaching the protective pot to the intake pipe. For example, the sleeve has a threading for a fastening screw with which it is fastened to the intake pipe. The protective pot may be fastened by means of the sleeve in the desired height and position, respectively, of the intake pipe and, moreover, is detachable.
- The sleeve is arranged at the lid, for example, in order to connect the protective pot to an intake pipe that passes through the lid.
- As an alternative, for being attached to the mouth of the intake pipe, the protective pot may have a connector neck that extends essentially at a right angle from the peripheral wall. For example, the connector neck is arranged at the peripheral wall at the level of the at least one suction window. The connector neck may for example have a threading for being screw-fastened to the intake pipe.
- Preferred embodiments will be explained in detail in conjunction with the drawings, wherein:
-
FIG. 1 is a perspective view of a protective pot mounted on an intake pipe for a lubricating coolant pump; -
FIG. 2 is a schematic view of a lubricating coolant pump having an intake pipe and a protective pot fastened thereto and immersed in a lubricating coolant reservoir; and -
FIG. 3 is a sectional view of a protective pot having a horizontal connector neck. - The
protective pot 10 shown inFIG. 1 has a closed cylindricalperipheral wall 12 formed in one piece with a closedplane bottom 14. Thewall 12 is connected at its top edge to aplane lid 16. Thebottom 14 and thelid 16 are disk shaped, thelid 16 having a diameter slightly larger than that of thebottom 14 and thecylindrical wall 12. - An
intake pipe 18 of a lubricating coolant pump 20 (FIG. 2 ) is passed centrally through thelid 16. Theintake pipe 18 is beveled at its lower end at an angle of approximately 45 i, whereby anintake opening 22 is formed. The latter is arranged in the lower portion of theprotective pot 10. At its lowest point, theintake pipe 18 almost reaches the bottom 14. - The
wall 12 has in its upper portion fourrectangular suction windows 24 distributed over the periphery of the pot. The lower edges 26 of thesuction windows 24 are located in a height that is still significantly above the highest point of theintake opening 22. Thesuction windows 24 extend upwardly up to thelid 16 which covers thesuction windows 24. - Together with the part of the
wall 12 located below thesuction windows 24, the bottom 14 forms a closed lower part of theprotective pot 10. This closed part assures that liquid can enter into theprotective pot 10 only through thesuction windows 24 which are arranged in a height of several centimeters, for example, above the bottom 14. - The
protective pot 10 is fastened to theintake pipe 18 by means of alower sleeve 28 that is tightened on theintake pipe 18 with afastening screw 30. Thesleeve 28 is arranged under thelid 16 approximately in the height of thesuction windows 24 and is, for example, connected to thelid 16. Above thelid 16, anupper sleeve 32 is also tightened on theintake pipe 18 with afastening screw 30. - The
upper sleeve 32 may for example be mounted on theintake pipe 18 separately of thelid 16, so as to define the mounting position of theprotective pot 10 when the same is detached. Optionally, however, theupper sleeve 32 is rigidly connected to thelid 16. It is also conceivable that the lower part of theprotective pot 10 having the bottom 14 and thewall 12 is rigidly connected to thelower sleeve 28, whereas thelid 16 forms a separate member. -
FIG. 2 shows schematically a lubricatingcoolant pump 20 having theintake pipe 18 and anoutlet pipe 34. For example, the lubricatingcoolant pump 20 is a screw pump. Theprotective pot 10 is mounted on the lower end of theintake pipe 18 as inFIG. 1 . Theintake pipe 18 together with theprotective pot 10 is immersed in a lubricatingcoolant reservoir 36 of a machine tool. - In
FIG. 2 , the lubricatingcoolant reservoir 36 is filled with a lubricatingcoolant emulsion 40 up to a level clearly above theprotective pot 10. This emulsion flows into theprotective pot 10 through thesuction windows 24 and is pumped through theintake opening 22 by thepump 20. - In the lower part of the lubricating coolant reservoir 38, accumulations of metal chips and
silicon carbide particles 42, for example, have been indicated as dashed lines. These chips and particles sink down in the lubricatingcoolant emulsion 40 due to their weight. Although theintake opening 22 is arranged close to the bottom of the lubricatingcoolant reservoir 36, the chips andsilicon carbide particles 42 are not sucked in by thepump 20, however, because the lubricating coolant emulsion is sucked in only through thesuction windows 24 that are arranged at a higher level. In this way, theprotective pot 10 efficiently prevents an excessive wear of the lubricatingcoolant pump 20. - When the level of the lubricating
coolant emulsion 40 in the lubricatingcoolant reservoir 36 decreases to approximately the top edge of theprotective pot 10, thelid 16 serves to prevent the suction action of thepump 20 from creating an air funnel. Optionally, however, thelid 16 may be dispensed with, so that the protective pot will essentially have the form of a pot with an open top, for example, connected to thesleeve 28 by cross bars, for example. -
FIG. 3 shows another embodiment of aprotective pot 10′, and like or similar parts have been designated with like reference numerals as inFIGS. 1 and 2 . - The
protective pot 10′ ofFIG. 3 differs from theprotective pot 10 ofFIGS. 1 and 2 essentially in that an intake pipe of a lubricating coolant pump does not penetrate thelid 16 of theprotective pot 10′, but theprotective pot 10′ has a horizontally directedconnector neck 50 which may for example be screwed with a threading 52 to an intake pipe of the lubricating coolant pump, said intake pipe extending horizontally, at least in an end portion thereof. Thus, theconnector neck 50 prolongs the intake pipe and forms alateral intake opening 22′ inside of theprotective pot 10′. Theconnector neck 50 is arranged in the upper portion of theprotective pot 10, approximately in the height of theintake windows 24. - In this embodiment, the
lid 16 has the same diameter as the bottom 14. Theprotective pot 10′ is formed for example with three angularly distributed, approximatelyrectangular suction windows 24. These extend again upwardly, approximately up to thelid 16. - As the
protective pot 10 ofFIGS. 1 and 2 , theprotective pot 10′, thanks to its closed lower part, assures that liquid can only enter into theprotective pot 10′ through thesuction windows 24 which are arranged in a height of several centimeters, for example, above the bottom 14. In this way, it is again prevented that possible chips or silicon carbide particles which have accumulated in the lower part of a lubricating coolant reservoir, are sucked in by the pump. Thus, theprotective pot 10 according toFIG. 3 prevents an excessive wear of the lubricating coolant pump due to metal chips or silicon carbide particles being sucked in, also for lubricating cooling pumps the intake pipe of which extends horizontally, at least in the vicinity of the lower end thereof.
Claims (10)
1. A protective pot, adapted to be mounted to a mouth of an intake pipe of a lubricating coolant pump for a machine tool, comprising a closed bottom, a closed peripheral wall and at least one suction window arranged in a distance above the bottom.
2. The protective pot according to claim 1 , wherein the peripheral wall is essentially cylindrical.
3. The protective pot according to claim 1 , wherein a lid is arranged above the at least one suction window.
4. The protective pot according to claim 3 , wherein the at least one suction window is arranged in the peripheral wall and extends up to the lid.
5. The protective pot according to claim 1 , comprising at least one sleeve for mounting the protective pot to the intake pipe.
6. The protective pot according to claim 1 , comprising a connector neck to be mounted to the mouth of the intake pipe, said connector neck projecting from the peripheral wall essentially at a right angle.
7. An intake pipe for a lubricating coolant pump for machine tools, wherein a protective pot according to any of the preceding claims is arranged at one end of the intake pipe.
8. The intake pipe according to claim 7 , wherein the protective pot is arranged at a lower end of the intake pipe, and an intake opening (22) of the intake pipe is arranged inside of the protective pot.
9. The intake pipe according to claim 8 , wherein the intake opening is arranged below said at least one window.
10. A lubricating coolant pump for machine tools, comprising an intake pipe according to any of the claims 7 to 9 .
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005006461.2 | 2005-02-12 | ||
DE200510006461 DE102005006461B3 (en) | 2005-02-12 | 2005-02-12 | Protection device for suction tubes of slurry pumps has closed bottom, closed the circumferential wall and at least one suction window above bottom |
DE200520013761 DE202005013761U1 (en) | 2005-08-31 | 2005-08-31 | Protective pot for fixing to the opening of a suction tube of a lubricant pump for machine tools comprises a closed base, a closed peripheral wall and a suction window arranged at a distance from the base |
DE202005013761.8 | 2005-08-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060182642A1 true US20060182642A1 (en) | 2006-08-17 |
Family
ID=36815835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/348,758 Abandoned US20060182642A1 (en) | 2005-02-12 | 2006-02-07 | Protection device for intake pipes of lubricating coolant pumps |
Country Status (1)
Country | Link |
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US (1) | US20060182642A1 (en) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841488A (en) * | 1973-08-17 | 1974-10-15 | H Yessaian | Agitating strainer for machine tool coolant systems |
US4406590A (en) * | 1980-06-11 | 1983-09-27 | Tecumseh Products Company | Hermetic compressor |
US5030346A (en) * | 1988-01-15 | 1991-07-09 | Henry Filters, Inc. | Pump for filtration system |
US5599457A (en) * | 1993-09-03 | 1997-02-04 | Advanced Waste Reduction | Machine coolant treatment method |
US5601705A (en) * | 1995-06-06 | 1997-02-11 | Glasgow; James A. | Skimmer/coalescher system for removing and separating tramp oil from an aquaeous coolant |
US5814213A (en) * | 1997-11-10 | 1998-09-29 | Glasgow; James A. | Skimming apparatus |
US5842420A (en) * | 1992-09-07 | 1998-12-01 | Khoo; Chew Thong | Crankshaft lubrication system |
US5948274A (en) * | 1996-10-10 | 1999-09-07 | Aircom Manufacturing, Inc. | Coolant reconditioning system |
US6171077B1 (en) * | 1998-03-11 | 2001-01-09 | Tecumseh Products Company | Suspension spring support for hermetic compressors |
US6179558B1 (en) * | 1999-09-08 | 2001-01-30 | The Game Tracker, Inc. | Filtering pump assembly |
-
2006
- 2006-02-07 US US11/348,758 patent/US20060182642A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841488A (en) * | 1973-08-17 | 1974-10-15 | H Yessaian | Agitating strainer for machine tool coolant systems |
US4406590A (en) * | 1980-06-11 | 1983-09-27 | Tecumseh Products Company | Hermetic compressor |
US4406590B1 (en) * | 1980-06-11 | 1985-11-12 | ||
US5030346A (en) * | 1988-01-15 | 1991-07-09 | Henry Filters, Inc. | Pump for filtration system |
US5842420A (en) * | 1992-09-07 | 1998-12-01 | Khoo; Chew Thong | Crankshaft lubrication system |
US5599457A (en) * | 1993-09-03 | 1997-02-04 | Advanced Waste Reduction | Machine coolant treatment method |
US5601705A (en) * | 1995-06-06 | 1997-02-11 | Glasgow; James A. | Skimmer/coalescher system for removing and separating tramp oil from an aquaeous coolant |
US5948274A (en) * | 1996-10-10 | 1999-09-07 | Aircom Manufacturing, Inc. | Coolant reconditioning system |
US5814213A (en) * | 1997-11-10 | 1998-09-29 | Glasgow; James A. | Skimming apparatus |
US6171077B1 (en) * | 1998-03-11 | 2001-01-09 | Tecumseh Products Company | Suspension spring support for hermetic compressors |
US6179558B1 (en) * | 1999-09-08 | 2001-01-30 | The Game Tracker, Inc. | Filtering pump assembly |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BRINKMANN PUMPEN K.H. BRINKMANN GMBH & CO. KG, GER Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WAGNER, PETER;REEL/FRAME:017179/0712 Effective date: 20060201 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |