WO2012168157A1 - Dispositif pour le dosage de lubrifiants dans l'usinage par enlèvement de métal - Google Patents

Dispositif pour le dosage de lubrifiants dans l'usinage par enlèvement de métal Download PDF

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Publication number
WO2012168157A1
WO2012168157A1 PCT/EP2012/060398 EP2012060398W WO2012168157A1 WO 2012168157 A1 WO2012168157 A1 WO 2012168157A1 EP 2012060398 W EP2012060398 W EP 2012060398W WO 2012168157 A1 WO2012168157 A1 WO 2012168157A1
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WO
WIPO (PCT)
Prior art keywords
metering
pump
supply channel
channel system
block
Prior art date
Application number
PCT/EP2012/060398
Other languages
German (de)
English (en)
Inventor
Werner Studer
Original Assignee
Werner Studer
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 Werner Studer filed Critical Werner Studer
Priority to EP12725411.8A priority Critical patent/EP2718569A1/fr
Priority to US14/124,160 priority patent/US20140224832A1/en
Publication of WO2012168157A1 publication Critical patent/WO2012168157A1/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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N11/00—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups
    • F16N11/10—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups by pressure of another fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/02—Lubricating-pumps with reciprocating piston

Definitions

  • This invention relates to metering pumps for liquids, particularly lubricants, and to lubricant metering devices for minimal quantity cooling lubrication in metalworking.
  • a combined cooling and lubrication can be achieved for example with conventional emulsion cooling lubrication.
  • the cooling emulsions used for this contain about 3 to 6% by volume of oil-like lubricant in water. Relatively large amounts of cooling emulsion are required, which, moreover, have to be disposed of in a complicated manner due to their composition and may be harmful to health. The amount of lubricant required can be reduced with minimum quantity cooling lubrication.
  • a coaxial metering in which an inner nozzle for the lubricant is disposed within an outer annular nozzle for the compressed air.
  • the lubricant is pneumatically conveyed, with pneumatically actuated metering pumps, which promote specific, small amounts of lubricant at a certain frequency via a delivery line to the nozzle and there in the air flow. In this case, a separate metering pump is used for each metering.
  • Such pneumatic metering pumps are known, for example, from US Pat. No. 3,888,420 and US Pat. No. 4,125,176.
  • a metering piston is displaced by a compressed air pulse in a metering chamber filled with the viscous lubricant to be delivered, whereby a defined amount of liquid is forced through a check valve into a delivery line.
  • the same amount of liquid is correspondingly expelled through a coaxial nozzle into a continuous stream of compressed air, where it is entrained and thereby deflected and reaches the tool.
  • FIG. 1 shows an example of such a metering pump 1 from the prior art.
  • a cylindrical metering chamber 12 is arranged in the direction of the longitudinal axis 1101. This is completed on one side with a check valve 1 31, and connected on the other side with a supply channel system 1 1.
  • the supply channel system 11 serves to supply the liquid 2 1 to be metered, ie the lubricant, into the metering chamber 1.
  • a metering piston 1 3 is displaceably arranged, which can be actuated by a pneumatic actuator device 1 6.
  • This comprises an active with the metering piston 1 4 Aktuatorkolben 1 63, which is slidably disposed in an actuator cylinder 1 62 in the longitudinal direction 1 01.
  • the actuator cylinder 1 62 is connected to a supply channel system 1 7 for the pneumatic medium, usually compressed air. Without pressurization of the actuator, a return spring 1 61 presses the actuator piston in the actuator cylinder in the basic position (in the example shown to the left).
  • the front end 1 41 of the metering piston is in a position in which the lubricant 2 1 from the supply channel 1 1 can flow into the metering chamber 1 2.
  • the dosing piston firstly closes off the dosing chamber from the supply channel 11, and then presses the viscous lubricant contained therein through the check valve 1131 into the pumping channel 13, and the lubricant supply line 45 connected thereto.
  • the pressurization takes place as a short pulse, which is generated by a corresponding pressure pulse generator (not shown). After the end of the pressure pulse, the return element 1 61 moves the metering piston 1 4 again to the left. The check valve 1 31 closes, and liquid 2 1 flows into the chamber 1 2 after.
  • a knob 1 65 is provided, with which the actuator can also actuate manually, by pressing the button.
  • the position of the metering piston with respect to the actuator piston 1 63 can be adjusted and adjusted in the longitudinal direction to a certain extent.
  • the metering piston is extended beyond the Aktuatorkolben and provided with an external thread 1 64.
  • the external thread is screwed into a corresponding continuous internal thread of the actuator piston, and the two elements are connected in a form-fitting manner.
  • the knob 1 65 By turning the knob 1 65, the metering piston rotates in the thread of the Aktuatorkolbens, and moves accordingly in the longitudinal direction 1 01.
  • the basic position and the end position of the actuator piston in the actuator cylinder, and thereby also the stroke of the metering piston, are determined by corresponding stops.
  • the basic position and the end position of the metering piston can now be adjusted, and thus the actual effective stroke within the metering chamber, which determines the volume of lubricant delivered per stroke.
  • the necessary metering pumps are preferably supplied via a common lubricant supply.
  • a particularly compact built device is known, in which the metering pumps are mounted stacked. Dosing pumps for such devices, such as the pump of Figure 1, must be designed accordingly.
  • the feed channel system 1 1 for the liquid 2 1 in such a metering pump has two opposing parallel, flat side walls 1 02, 1 02 'an opening 1 1 1, 1 1 1' on. A recess 1 03, 1 03 'around the opening around which serves to receive a sealing element in the form of an O-ring.
  • Several identical individual metering pumps 1, 1 a, 1 b designed as cuboid pump blocks 10 are assembled into a stack, as shown schematically in FIG. 2, in a cross section through the supply channel 11.
  • the openings 1 1 1, 1 1 1 'of the feed channel system are arranged so that when stacking the pump blocks, the openings of adjacent metering pumps are superimposed, with an O-ring 1 04 or other suitable sealant provides a sealing connection.
  • For the pump stack 42 thus results in a continuous supply line, comprising the sealingly connected individual feed channel systems 1 1.
  • the supply line is closed by a closing block 41 4, at the upper end by a connection block 41 5 for the supply line 46, which is connected to a reservoir 43 for the liquid. From the reservoir 43, the liquid flows gravitationally driven to the pump.
  • the delivery into the supply line can be effected by a constant pressurization.
  • the supply channel system 1 7 for the pneumatic medium designed so that when stacking several metering pumps results in a common supply line.
  • several metering pumps can be actuated simultaneously, by a single compressed air pulse.
  • the pump blocks 1 0 of the standardized metering pumps 1, 1 a, 1 b are arranged in the example shown between two clamping plates 41 3, 41 and the nuts 41 1 by means of clamping bolts 41 and the pump blocks 1 crimp along the stack axis non-positively and positively. This allows a cost-effective production of the entire lubricant metering device 4, wherein the number of pumps can be changed as needed.
  • the individual lubricant dosing devices can be efficiently adapted to individual customer requirements. Only the length of the clamping bolt 41 0 must be selected accordingly.
  • the pump stack of such a conventional metering device is easy to assemble. If, however, during operation, a malfunction of a single metering pump, and this must be replaced if necessary for repair, the entire pump stack 42 must be emptied, disassembled and disassembled. This leads to expensive downtime of the affected NEN machine tools. Correspondingly large is also the risk that actually due maintenance cycles will fail, which can later lead to greater disruption.
  • lubricant metering devices should be able to be constructed individually and efficiently.
  • the individual metering pumps of such a lubricant metering device or their faster-wearing parts should be able to be replaced quickly and easily.
  • Another object of the invention is to provide lubricant metering devices and metering pumps for such devices in which shorter downtime due to maintenance work is incurred.
  • Such lubricant metering and metering pumps should also be efficient and inexpensive to produce.
  • a metering pump for metering liquids has at least one pump block, comprising a first feed channel system for the liquid to be conveyed, a pump channel, and a pump device for pumping the liquid from the feed channel system into the pump channel.
  • the pump block has a housing jacket in the form of a cylinder or a truncated cone, wherein the supply channel system opens into at least one opening arranged in the housing jacket.
  • the pumping device of the metering pump has a metering chamber connected to the first supply channel system, a metering piston displaceably arranged in the metering chamber along an axis and an actuator device for moving the metering piston along said axis, wherein the metering piston is adapted to move in one direction along the said axis to pump a certain amount of liquid present in the metering chamber through a check valve in the pumping channel.
  • the actuator device of the metering pump is adapted to operate the metering piston electromagnetically or pneumatically.
  • a particularly advantageous variant of a metering pump according to the invention has a pneumatic actuator device which can be operated by a pneumatic medium, in particular compressed air, and a second supply channel system for the pneumatic medium for operating the pneumatic actuator device.
  • Said second supply channel system opens into at least one opening arranged in the housing jacket.
  • the actuator device may have a return element for the metering piston, for example a return spring.
  • a particularly advantageous embodiment of a metering pump according to the invention has a mounting block with at least one receptacle which is adapted to the shape of the housing shell of the pump block.
  • the pump block can be arranged flush.
  • Such a metering pump may comprise means for fixing the pump block in the receptacle of the mounting block.
  • such a metering pump comprises a recess, in particular a circumferential groove on the housing shell of the pump block, and arranged in a through-threaded hole in the mounting block screw, wherein the groove, the threaded bore, and the screw are configured and arranged such that at a mounted pump block the screw with the groove reversibly engageable and so the pump block in the mounting block in the direction of the longitudinal axis is reversibly positively fixed.
  • the screw is made of a material which has a lower hardness than the casing of the pump block. For example, if the jacket is made of steel or brass, then the screw can be made of a polymer, for example.
  • the assembly block of an advantageous Ausfatunsgform such inventive metering pump has a third supply channel system for the liquid.
  • a first circulating groove which is connected to the third supply channel system.
  • the N ut is arranged such that the at least one opening of the first supply channel system of a pump block arranged in the mounting block overlaps with the first circumferential N ut, so that the first and third supply channel system form a continuous liquid supply channel system.
  • the mounting block of another advantageous Ausfatunsgform such inventive metering pump has a third supply channel system for the liquid, which opens into at least one opening arranged in the wall of the receptacle.
  • a first circulating groove is provided, which is connected to the first supply channel system.
  • the N ut is arranged such that the at least one opening of the third supply channel system overlaps with the first circumferential N ut so that the first and third supply channel systems form a continuous liquid supply channel system.
  • Such metering pumps particularly advantageously have sealing elements which are arranged in the receptacle of the mounting block and / or around the housing jacket of the pump block along the circumference.
  • the metering pump mounting block may include a fourth pneumatic medium supply duct system, and a second circumferential groove connected to the fourth supply duct system on the wall of the receptacle.
  • the N ut is arranged such that the at least one opening of the second supply channel system of a pump block arranged in the mounting block overlaps with the second circulating N ut so that the second and fourth supply channel systems form a continuous pneumatic medium supply duct system.
  • the mounting block of the metering pump may comprise a fourth supply channel system for pneumatic medium, which opens into at least one opening arranged in the wall of the receptacle.
  • a fourth supply channel system for pneumatic medium which opens into at least one opening arranged in the wall of the receptacle.
  • a second circumferential groove which is connected to the second supply channel system and which is arranged in such a way that the at least one opening of the fourth supply channel system overlaps with the second circumferential groove.
  • the second and fourth supply channel systems thus form a continuous supply channel system for pneumatic medium.
  • such metering pumps have sealing elements which is arranged in the receptacle of the mounting block and / or around the housing shell of the pump block along the circumference, and which are adapted to the at least one opening of the second supply channel system or fourth supply channel system and the second circumferential groove sealingly connect.
  • the mounting block of a metering pump according to the invention has two parallel, planar walls.
  • Such a metering pump has the advantage that it can be mounted stacked to save space.
  • the mounting block has two parallel, planar walls, and the third supply channel system opens on both walls in an opening.
  • the two openings are arranged such that an opening coincides with a corresponding opening of another identical metering pump, when the two metering pumps are placed with the walls on top of each other.
  • the mounting block may have two parallel, planar walls, and the fourth supply channel system opens into an opening on both walls, wherein the two openings are arranged such that an opening coincides with a corresponding opening of another identical metering pump when the two metering pumps with the Walls are laid one on top of the other.
  • a lubricant metering device has at least one metering pump according to the invention.
  • a lubricant metering device comprises two or more metering pumps according to the invention, these having a mounting block with a receptacle which is adapted to the shape of the housing shell of a pump block of the metering pump, and in which the pump block is arranged flush and fixed.
  • two or more metering pumps are arranged in a stack in such a lubricant metering device according to the invention. in each case two parallel, planar walls of the mounting blocks of two adjacent metering pumps are flush with each other.
  • a lubricant metering device may further comprise a reservoir for the liquid, a common supply channel system of the metering pumps for the liquid and a shut-off valve for reversibly separating the supply channel system from the reservoir.
  • a lubricant metering device in such an embodiment of a lubricant metering device according to the invention, means are provided for releasably connecting the mounting blocks of two adjacent metering pumps.
  • these connecting means comprise clips or clamps which are operatively connected to the assembly blocks to be connected.
  • these clips or brackets are designed such that when you create the effective connection of the clips or brackets with the mounting blocks to be joined, the mounting blocks are braced against each other.
  • Figure 1 shows schematically a longitudinal section through a pneumatic lubricant metering pump, as it is known from the prior art.
  • Figure 2 shows schematically a cross section through lubricant metering devices with a plurality of stacked metering pumps, as known from the prior art.
  • Figure 3 shows schematically an embodiment of a metering pump according to the invention, (a) as a longitudinal section through the pump block alone, (b) as a longitudinal section through the mounting block alone, (c) as a cross section through the mounting block alone along plane AA, and (d) as a longitudinal section through Assembly block and pump block in assembled condition.
  • FIG. 4 shows schematically a cross section through two metering pumps of Figure 3, in a stacked arrangement.
  • FIG. 5 schematically shows a detail of an embodiment of a metering pump according to the invention, with a longitudinal fixing of the pump block in the assembly block.
  • FIG. 6 shows schematically a detail of an embodiment of a metering pump according to the invention, with a lateral fixing of the pump block in the assembly block.
  • Figure 7 shows schematically a variant of a metering pump according to the invention, in which the circumferential grooves of the feed channel systems are arranged on the cylinder jacket 1 5 of the pump block, (a) as a longitudinal section through the mounting block and pump block in the assembled state, and (b) as a longitudinal section through the mounting block alone.
  • Figure 8 shows schematically a longitudinal section (a) by a particularly advantageous variant of a metering pump according to the invention, and (b) by the mounting block alone.
  • Figure 9 shows a side view of the pump block of still another particularly advantageous
  • Embodiment of a metering pump according to the invention Embodiment of a metering pump according to the invention.
  • FIG. 10 shows a mounting block suitable for the pump block from FIG. 9, (a) in a plan view of the mounting block, (b) in a side view onto the mounting block, (c) in a longitudinal section through the two side walls of the mounting block along plane AA, (FIG. d) in a cross-section through the plane B-B, (e) in a cross-section through the plane CC, and (f) in a cross-section through the plane D-D.
  • FIG. 11 shows an advantageous clip for positive and non-positive connection of two dosing pumps according to the invention, (a) in plan view, and (b) in a section through plane F-F.
  • Figure 1 2 shows another mounting block, matching the pump block of Figure 9, with a
  • FIG. 1 3 shows a cross section through a metering device according to the invention, with a reservoir and a respective metering pump according to the invention from Figure 1 2 and Figure 1 5, in a stacked arrangement.
  • Figure 1 4 shows another possible mounting block, matching the pump block of Figure 9, with two receptacles for pump blocks, (a) in a plan view of the mounting block, (b) in a side view of the mounting block, (c) in a longitudinal section through the both side walls of the mounting block along plane AA, (d) in a cross section through the plane BB, (e) in a cross section through the plane CC, and (f) in a cross section through the plane D-D.
  • Figure 1 5 shows a schematic cross section of yet another advantageous embodiment of a mounting block fitting to the pump block of Figure 9, with receptacles for two pump blocks and with a connection for a reservoir and a stopcock.
  • the metering pump consists of a substantially cylindrical pump block 1 0, which is arranged in a suitably shaped mounting block 30.
  • the pump block 1 0 includes the actual pneumatic pumping device, which corresponds to the pumping device of Figure 1 from the operating principle.
  • a cylindrical metering chamber 1 2 is arranged in the pump body 1 0, which is closed on one side with a check valve 1 31 and connected on the other side to a supply channel system 11.
  • a metering piston 1 4 is slidably disposed along the longitudinal axis, and is actuated by a pneumatic actuator device 1 6.
  • This comprises an active with the metering piston 1 4 Aktuatorkolben 1 63, which is arranged in an actuator cylinder 1 62 slidably in the longitudinal direction.
  • the actuator cylinder 1 62 is connected to a supply channel system 1 7th connected to the pneumatic medium. Without pressurization of the actuator, a return spring 1 61 presses the actuator piston in the actuator cylinder in the home position (as shown).
  • the actuator cylinder 1 62 is pressurized, then the actuator piston 1 63 and the metering piston 1 4 shifts to the right, and the viscous lubricant in the metering chamber 1 2 is through the check valve 1 31 in the pumping channel 1 3 and the lubricant supply line 45 pressed.
  • the lubricant delivery line 45 is sealingly connected to the pump block 10 via a corresponding threaded connection piece 451.
  • the return element 1 61 moves the metering piston 1 4 back to the left back to the basic position.
  • the check valve 1 31 closes, and liquid flows from the supply channel system 1 1 in the chamber 1 2 after.
  • a knob 1 65 is provided, with which the actuator can be actuated manually.
  • the position of the metering piston with respect to the actuator piston 163 can be adjusted longitudinally to accommodate the effective stroke within the metering chamber.
  • the metering piston, which is extended beyond the actuator piston, is provided with an external thread, which is screwed into a corresponding internal thread of the actuator piston.
  • the mounting block 30 has a cuboid outer shape.
  • the dosing pump can therefore be mounted stacked analogous to the one-piece metering pumps according to FIG.
  • a cylindrical cavity is provided in alignment with the longitudinal axis 1 01, which serves as a receptacle 31 for the cylindrical pump block 10.
  • a first longitudinal opening 3 1 2 serves as an insertion opening for the pump block 1 0 in the mounting block 30.
  • a second longitudinal opening 31 3 allows access to the connection for the delivery line 45th
  • the mounting block 30 31 two circumferential grooves 33, 36 are arranged on the inner wall 31 1 of the receptacle. These grooves or grooves are connected to a third 32 and / or fourth supply channel system, which are arranged in the mounting block.
  • the block-shaped mounting block 30 on two opposite walls 302, 303 has two openings of the third supply channel system 32 for the liquid to be pumped.
  • two corresponding openings of the fourth supply channel system 35 are provided for the pneumatic medium.
  • the openings of the third and fourth supply channel system are arranged so that in a stacked arrangement of the same metering pumps according to the invention, the mutually corresponding openings of adjacent metering pumps are superimposed.
  • O-rings 104 or other suitable sealing means are disposed in corresponding circular recesses 103, and provide a sealing connection between the individual metering pumps.
  • the position of the recesses 33, 36 in the lateral surface 3 1 1 of the receptacle 31 is selected in the illustrated embodiment so that in the finished together mounted metering pump 1, the openings 1 1 1, 1 1 1 ', 1 7 1, 1 71' of the first supply channel system 1 1 and the second supply channel system 1 7 on the lateral surface 1 5 of the pump block 1 0 on the corresponding grooves 33, 36 on the inner wall 3 1 1 lie.
  • I n longitudinal direction 1 01 are seen on both sides of the openings 1 1 1, 1 1 1 1 'and 1 71, 1 7 1' circumferentially around the cylinder jacket 1 5 of the pump blocks 1 0 sealing elements 331, 331 'and 361, 361' arranged.
  • these are O-rings, which are arranged in corresponding recesses on the lateral surface 1 5.
  • Said sealing elements ensure a sealing connection between the first 1 1 and third 32 supply channel system and the second 1 7 and fourth 36 supply channel system.
  • a major advantage of such an embodiment of the inventive metering pump 1 is the fact that the assembly of the pump block in the mounting block with respect to the rotational position about the longitudinal axis 1 01 can be done in any position. Regardless of the rotational orientation of the pump block 10, a continuous connection is ensured via the grooves 33, 36. This facilitates the installation of the pump block 1 of a metering pump 1 according to the invention, which essentially has to be inserted only in the receptacle of the mounting block, up to the longitudinal stop 3 1 4.
  • the housing shell 1 5 of the pump block 1 0 and the receptacle 3 1 of the mounting block 30 advantageously have the least possible clearance.
  • the sealing rings and their mounting grooves can be dimensioned such that the sealing rings are as little plastically deformed at a mounted metering pump and have a correspondingly longer life.
  • the manufacturing tolerance of jacket 1 5 and receptacle 3 1 to 5 microns is advantageous. rometer or less. Such exact dimensioning also requires a careful treatment of the pump block jacket 1 5 during transport and assembly accordingly.
  • FIG. 4 shows a detail of a stack 42 of metering pumps 1, 1 a according to the invention according to FIG. 3, in cross-section through the supply channel system 11 for the lubricant.
  • the pump block 10 in one metering pump 1, the pump block 10 is aligned so that the first supply channel system 1 1 is aligned with the third supply channel system 32.
  • the pump block 1 0a is rotated in comparison to the mounting body 30a.
  • the first supply channel system 11a is connected to the third supply channel system 32a via the circulating groove 33a.
  • the orientation of the pump block 1 0 is not relevant to the function of the metering pump.
  • Such a metering pump according to the invention further makes it possible to swiftly and efficiently exchange that part of the pump which has moving parts and must be appropriately maintained, without having to dismantle a metering device 4 consisting of a plurality of metering pumps stacked in a stack, as in the prior art. It only temporarily interrupted the lubricant and pneumatic supply and the delivery lines are separated. Subsequently, the pump block is removed from the mounting block, and a new pump block with fresh sealing elements used. After connecting the delivery line and opening the supply lines, the dosing device can be put back into operation immediately. The removed pump block can then be separately reconditioned or repaired.
  • the inventive design of the metering pump has the further advantage that existing metering devices can be retrofitted with metering pumps according to the invention if they are designed to be compatible here by the dimensioning of the mounting block and the connection elements.
  • a defective metering pump can be replaced by a metering pump according to the invention. If later this must be revised again, but now no decomposition of the stack is more necessary, but it is only the pump block replaced.
  • the first supply channel system of the pump block could also be designed as a blind hole instead of a through hole.
  • a single opening which is substantially sufficient to ensure the supply of lubricant into the metering chamber.
  • the use of a continuous channel has the advantage that the first time the metering pump filling the vent works better.
  • the pump block 10 is not fixed in the longitudinal direction 110, which is not necessary since no forces occur between pump block and mounting block in the longitudinal direction.
  • the long-side stop 3 1 4 ensures the correct positioning.
  • fixing means 34 can also be provided in order to fix the pump block positively and / or non-positively in the mounting block.
  • a union nut, or a similar means may be provided to block the pump block in the receptacle 3 1.
  • the pump block and mounting block may be provided with a bayonet lock mechanism, or the pump block is secured with a snap ring.
  • Figure 5 shows another possible variant for fixing the pump block 1 0 in the mounting block 30, in a longitudinal section through the rear end of the metering pump.
  • the connecting piece 451 is provided with a continuous external thread, which is screwed at one end into the pump block. Also arranged on the external thread is a nut 452, which is supported on the rear end of the mounting block, and thus fixes the pump block in a form-fitting manner in the receptacle of the mounting block.
  • Figure 6 shows an embodiment of a metering pump 1 according to the invention, in which in a slot 343 in the lateral wall of the mounting block 30, a screw 341 is provided which can engage in a designated circumferential groove 342 in the pump block, so the longitudinal position of the pump block 1 0 to fix positively in the receptacle 31.
  • Figure 6 shows a cross section in the region of the actuator cylinder 1 62, by the circumferential Fix istsnut 342.
  • the groove 342 allows to mount the pump block without exact angular orientation in the mounting block.
  • the fixing screw 341 is advantageously made of a stable plastic or a soft metal. This is sufficient for the positive fixing. At the same time, it is thus avoided that when the pump block is incompletely inserted into the mounting block, the fixing screw 341 pressed into the cylinder jacket and this deformed and damaged. Since a screw 341 of plastic or soft metal has a lower hardness than the cylinder shell of the pump block, the screw is deformed instead.
  • FIG. 1 A variant of a metering pump according to the invention, in which the circumferential grooves are arranged on the cylinder jacket 1 5 of the pump block, is shown schematically in FIG.
  • Such a variant has over the embodiment of Figure 2 has the advantage that the mounting body can be made easier.
  • FIG. 8 shows another advantageous embodiment of a metering pump 1 according to the invention, in which a third 51 and a fourth 52 circumferential groove are arranged on the lateral surface 3 1 1 of the receptacle 31.
  • the third nut 53 is in communication with a pumping channel 1 3 'arranged in the lateral wall of the mounting block 30 for the lubricant to be pumped, which is connected to the delivery line (not shown).
  • the pump channel 1 3 in the pump body opens on two sides against the N ut 51st
  • Such an embodiment of the metering pump 1 makes it possible to attach the connection for the delivery line to the mounting block 30, instead of the pump block 1 0. Accordingly, in a replacement of the pump block 1 0, the delivery line 45 can not be separated, which further simplifies the exchange.
  • the fourth nut 52 in turn communicates with a vent channel 53 in the lateral wall of the mounting block 30, which is open towards the outside environment.
  • the pump block 10 has one or more bores 54, which open on the lateral surface 15 against this fourth groove 53, and with which the pressure side of the cylinder 1 62 is opposed to the volume.
  • This has the advantage that the Aktuatorkolben 1 63 always works against external pressure, so that no relevant back pressure arises during the movement of the piston, and no heating takes place.
  • the groove 53 can simultaneously serve as a fixing groove 342 for a fixing screw 341 as shown in FIG.
  • FIG. 9 shows the pump block 110 of a further advantageous embodiment of a metering pump 1 according to the invention, which is constructed similarly to the metering pump from FIG.
  • the openings of the supply channel 1 1 for the liquid, the supply channel 1 7 for the compressed air, the venting channel 54 and the pumping channel 1 3 are arranged in a line.
  • the individual sealing elements are not shown, so that the corresponding grooves in the jacket 15 of the pump block 362, 362 ', 522, 51 2 become visible.
  • the pump block 10 shown can be installed, for example, in a mounting block 30 according to FIG. In this example, the venting channel 53 and the pumping channel 1 3 'open towards a first side wall 301 of the mounting block.
  • the supply channel 35 for the compressed air is arranged parallel to the supply channel 32 for the lubricant, but does not extend through the longitudinal axis 1 01, but intersects tangentially with the N ut 36.
  • a supply line of a compressed air pulse generator can be connected to a second side wall 301 'of the mounting block 30 towards a branch.
  • the corresponding compressed air pulse can thus be forwarded via the supply channel 35 to the adjacent metering pumps. If the connection 35 'is not required, for example because the compressed-air pulse is being delivered by another metering pump, then the opening 35' can be sealed off by a suitable closing element (not shown).
  • FIG. 1 Another advantage of the mounting block 30 shown is an advantageous, novel connection 41 of the individual metering pumps to a stack.
  • two T-shaped recesses 41 6 are provided for a clip 41 2 on both side walls.
  • the corresponding clip 41 2 is shown in Figure 1 1.
  • the clip 41 2 is screwed to both mounting blocks 30.
  • the clip is advantageously dimensioned so that when screwing a force in the longitudinal direction of the clip is formed, which braces the two mounting blocks against each other.
  • FIG. 1 A special variant of such a mounting block 30 is shown in FIG. This mounting block has on the upper wall 302 a connection 43 1 for a corresponding connection element (not shown) of a lubricant supply unit.
  • connection 431 is connected to a supply channel arranged tangentially to the groove 36, wherein this connection can be interrupted reversibly with a shut-off valve in the form of a stopcock 44.
  • a metering device 4 according to the invention with a lubricant supply unit with storage container 43 and one metering pump 1, 1a according to the invention from FIG. 11 and FIG. 15 in a stacked arrangement is shown in FIG.
  • the reservoir 43 is essentially a known from the prior art reservoir for the minimum quantity cooling lubrication, with appropriate ventilation and filtering devices, etc., which will not be discussed here in detail.
  • a supply line 46 opens into a connection piece 432, which is screwed into the corresponding connection opening 43 1 of a metering pump 1 according to FIG.
  • a second metering pump 1a according to FIG. 1 2 is connected to the first metering pump 1 by means of two clips 41 2. On its lower wall 303, in turn, this second metering pump 1a is closed by a closing block 414. In the example shown, this end block is screwed into corresponding bores 3 1 4 of the metering pump 1 a. Alternatively, clips could be used.
  • shut-off valve 44 is permanently open. If a pump block is now to be exchanged, shut-off valve 44 is closed after switching off the pressure pulse generators (not shown). The pump block can be removed without having to drain the lubricant supply channel system 32. After inserting the new pump block only the valve 44 must be opened again, and the inventive metering device 4 is ready for use again.
  • the mounting block 30 has two receptacles 31, 31 a for two Pump blocks.
  • Each of the two receptacles 3 1, 31 a has its own connection 35 'for the compressed air supply.
  • the compressed air can be done via one of these two statements, the other is closed. It is also possible to close both connections so that the compressed air supply takes place from an adjacent assembly block via the supply channel system 35.
  • such a mounting block 30 can also be realized with a connection 431 for the supply of lubricant, as shown in FIG.
  • a special connection block for the lubricant supply is provided, in which a connection opening 43 1 is provided for a supply channel system 32, closable by a shut-off valve 44.
  • the supply channel system can analogously to the assembly blocks discussed above with the supply channel system of other assembly blocks connected become.
  • Such an advantageous connection block accordingly offers particular advantages not only for metering devices with metering pumps according to the invention, but also for metering devices with cuboid metering pumps according to FIG. 2. In both cases, such a connection block according to the invention makes it possible to replace metering pumps without the lubricant container having to be removed by the supply with the shut-off valve 44 is disconnected.
  • sealing element sealing ring

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un dispositif pour le dosage de lubrifiants dans l'usinage par enlèvement de métal. Le bloc de pompage (10) d'une pompe de dosage (1) servant à doser des liquides (21) comprend un premier système de canal d'amenée (11) pour le liquide à transporter ; une chambre de dosage (12) reliée audit système de canal d'amenée ; un canal (13) de pompe ; un piston de dosage (14) qui est disposé dans la chambre de dosage de manière déplaçable le long d'un axe (142) et qui est conçu pour pomper dans le canal de pompe à travers un clapet antiretour (131) une quantité déterminée de liquide présent dans la chambre de dosage lors d'un déplacement dans une direction le long dudit axe (142) ; et un dispositif actionneur (16) pour mouvoir le piston de dosage le long dudit axe (142). Le bloc de pompage comporte une enveloppe extérieure (15) ayant la forme d'un cylindre ou d'un cône tronqué, le système de canal d'amenée (11) débouchant dans au moins une ouverture (111, 111') disposée dans l'enveloppe extérieure.
PCT/EP2012/060398 2011-06-08 2012-06-01 Dispositif pour le dosage de lubrifiants dans l'usinage par enlèvement de métal WO2012168157A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12725411.8A EP2718569A1 (fr) 2011-06-08 2012-06-01 Dispositif pour le dosage de lubrifiants dans l'usinage par enlèvement de métal
US14/124,160 US20140224832A1 (en) 2011-06-08 2012-06-01 Device for metering lubricants in metal cutting

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161494735P 2011-06-08 2011-06-08
US61/494,735 2011-06-08

Publications (1)

Publication Number Publication Date
WO2012168157A1 true WO2012168157A1 (fr) 2012-12-13

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PCT/EP2012/060398 WO2012168157A1 (fr) 2011-06-08 2012-06-01 Dispositif pour le dosage de lubrifiants dans l'usinage par enlèvement de métal

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US (1) US20140224832A1 (fr)
EP (1) EP2718569A1 (fr)
WO (1) WO2012168157A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4018118A1 (fr) * 2019-08-19 2022-06-29 Castrol Limited Tubes, systèmes de lubrification et procédés

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB775601A (en) * 1954-02-16 1957-05-29 Emmerich Satzger Oil lubricating pump
GB1291035A (en) * 1971-05-01 1972-09-27 Frank Davison Chainsaw oil pump
US3888420A (en) 1973-11-16 1975-06-10 Uni Mist Positive-displacement mist lubricator
US4125176A (en) 1977-07-21 1978-11-14 Master Pneumatic-Detroit, Inc. Injection type lubricating apparatus
US5725071A (en) 1997-01-28 1998-03-10 Master Pneumatic-Detroit, Inc. Machine cutting tool selective lubricator with air blow-off
DE19844650A1 (de) * 1997-09-29 1999-04-22 Nsk Ltd Öl-Luft-Schmiervorrichtung
US20020144865A1 (en) * 2001-04-10 2002-10-10 Lincoln Industrial Corporation Modular lubricating system and injector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB738316A (en) * 1953-02-12 1955-10-12 Dewandre Co Ltd C Improvements in or relating to lubricating devices
US5876189A (en) * 1997-12-09 1999-03-02 Lube Devices, Inc. Pumped fluid metering device for the precise feeding of a fluid

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB775601A (en) * 1954-02-16 1957-05-29 Emmerich Satzger Oil lubricating pump
GB1291035A (en) * 1971-05-01 1972-09-27 Frank Davison Chainsaw oil pump
US3888420A (en) 1973-11-16 1975-06-10 Uni Mist Positive-displacement mist lubricator
US4125176A (en) 1977-07-21 1978-11-14 Master Pneumatic-Detroit, Inc. Injection type lubricating apparatus
US5725071A (en) 1997-01-28 1998-03-10 Master Pneumatic-Detroit, Inc. Machine cutting tool selective lubricator with air blow-off
DE19844650A1 (de) * 1997-09-29 1999-04-22 Nsk Ltd Öl-Luft-Schmiervorrichtung
US20020144865A1 (en) * 2001-04-10 2002-10-10 Lincoln Industrial Corporation Modular lubricating system and injector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2718569A1

Also Published As

Publication number Publication date
US20140224832A1 (en) 2014-08-14
EP2718569A1 (fr) 2014-04-16

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