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
  • F04C2/00—Rotary-piston machines or pumps
  • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
  • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
• • 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
  • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
  • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
  • F04C15/0007—Radial sealings for working fluid
  • F04C15/0019—Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
• • 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
  • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
  • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
  • F04C15/0023—Axial sealings for working fluid
  • F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
• • 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
  • F04C2/00—Rotary-piston machines or pumps
  • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
  • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
  • F04C2/084—Toothed wheels
• • 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
  • F04C2/00—Rotary-piston machines or pumps
  • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
  • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
  • F04C2/086—Carter
• • 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
  • F04C2/00—Rotary-piston machines or pumps
  • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
  • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
  • F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members
• • 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
  • F04C2/00—Rotary-piston machines or pumps
  • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
  • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
  • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
  • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
  • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
  • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
  • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
  • B60T8/4031—Pump units characterised by their construction or mounting

Definitions

• the invention relates to an internal gear pump having the features of the preamble of claim 1.
• Such internal gear pumps are used instead of commonly used piston pumps in slip-controlled and / or power vehicle braking systems, and often, although not necessarily aptly referred to as return pumps ,
• Internal gear pumps are known. They have a pinion, that is to say an externally toothed gear wheel, which is arranged eccentrically in an internally toothed ring gear and meshes with the ring gear at one point of the circumference or in a circumferential section.
• the pinion and the ring gear can also be understood as gears of the internal gear pump.
• the internal gear pump has a sickle-shaped clearance between the pinion and the ring gear, which is referred to here as the pump chamber.
• a separator is arranged, which divides the pump room into a suction chamber and a pressure chamber. Due to its typical shape, the separator is also referred to as sickle or sickle piece, another name is filler.
• a typically hollow-round inner side of the separator lies on teeth of teeth of the pinion and a typically curved outward
• the internal gear pump according to the invention with the features of claim 1 has a multi-part separator with an inner part, which abuts tooth tips of teeth of a pinion, and an outer part, which rests on tooth tips of teeth of a ring gear on.
• the inner part and the outer part of the separator are movable against each other in the radial direction.
• “Radial” as well as the term “circumferential direction” used below refers to the internal gear pump and an intended mounting position of the parts. With direction of rotation an intended direction of rotation of the pinion and the ring gear is meant.
• the mobility of the inner part and the outer part in the radial direction of the internal gear pump allows the proposed system of the inner part and the outer part of the tooth tips of the teeth of the gears of the internal gear pump.
• the inner part is pressurized on its outer side so that it is pressed inwardly against the tooth tips of the teeth of the pinion, and the outer part is pressurized on its inner side, so that it is pressed outwards against the tooth tips of the teeth of the ring gear.
• the pressurization takes place in particular in a gap between the inner part and the outer part, which communicates preferably with the pressure chamber of the internal gear pump.
• To seal the pressure chamber from the suction chamber the inner part and the outer part of the separator are sealed at a sealing point against each other.
• the sealing point is the point at which a seal is arranged and / or on which the inner part and the outer part bear directly against each other for sealing.
• the foremost sealing point contrary to the direction of rotation of the internal gear pump, is meant, i. the closest to the suction chamber
• the inner part and the outer part are in the Um- Cushioning direction of the internal gear pump against the direction of rotation of the internal gear pump so far on the sealing over that the inner part and the outer part always, ie at any rotational position of the gears, in front of the sealing point between the inner part and the outer part of at least one tooth tip of a tooth of the gears , Is a tooth of the pinion or the
• Ring gear seen in the circumferential direction at the level of the sealing point are in the direction of rotation in front of the sealing point, the inner part and the outer part of at least one tooth tip of another tooth of the pinion and the ring gear.
• This engagement of the inner part and the outer part of the separator in the direction of rotation of the toothed wheels in front of the sealing point between the inner part and the outer part supports the inner part and the outer part against pivoting in the direction of rotation in front of the sealing point, ie. the inner part to the inside and the outer part to the outside, and in the direction of rotation behind the sealing point to each other, i. away from the tooth tips of the teeth of the gears, off.
• the invention avoids that the inner part and the outer part pivot so that their located behind the sealing point in the direction of rotation, i. the pressure chamber facing ends, to move toward each other and, as a result, stand out from the tooth tips of the gears.
• the dependent claims have advantageous refinements and developments of the invention specified in claim 1 to the subject.
• the subject matter of claim 3 is a pilot control, communicate by the interdental spaces between the teeth of the pinion and / or the ring gear with the pressure chamber.
• the purpose of the pilot control is a circumferentially continuous pressure build-up in the interdental spaces to the pressure chamber to avoid an abrupt increase in pressure when the interdental spaces open during the rotation of the gears to the pressure chamber.
• the feedforward control is typically realized by notches of narrow cross-section, which are located radially at a height between the tooth tips and a tooth base of the teeth of the gears and extend from the pressure space for a greater or lesser length along the separator. These notches are located in sidewalls or thrust washers on end faces of the gears and are open to the teeth of the gears.
• the gaps between the teeth in the region of the separator communicate with the pressure chamber through the notches, with the cross-section of the notches being so small that a throttling effect is produced which reduces the pressure in the interdental spaces in the circumferential direction continuously and not abruptly rise.
• the notches can also have bottlenecks as throttles.
• a different precontrol than with the explained notches is not excluded from the invention.
• According to the pilot control ends in the direction of rotation of the gears at or behind the sealing point of the inner part with the outer part of the separator, so that in the interdental spaces a pressure in the circumferential direction is built only at or behind the sealing point. This embodiment of the invention prevents the prevailing pressure in the interdental spaces pushes the inner part of the separator outward and / or the outer part inwards and lifts off from the tooth tips of the teeth of the gears.
• the internal gear pump according to the invention is provided in particular as a hydraulic pump for a hydraulic, slip-controlled and / or external power vehicle brake system.
• hydraulic pumps are also referred to as return pumps and today are predominantly designed as piston pumps.
• the single FIGURE shows an internal gear pump according to the invention in front view.
• inventive internal gear pump 1 is drawn without a pump housing. It has an externally toothed, here referred to as pinion gear 2 and an internally toothed, here referred to as ring gear 3 gear.
• the pinion 2 is arranged axially parallel and eccentrically in the ring gear 3, that the pinion 2 meshes with the ring gear 3.
• the pinion 2 is non-rotatably mounted on a pump shaft 4, with which the pinion 2 and the pinion 2, the intermeshing with him ring gear 3 are rotationally driven.
• One direction of rotation is indicated by arrows P.
• a peripheral portion opposite, in which the pinion 2 meshes with the ring gear 3, the internal gear pump 1 has a crescent-shaped clearance, the is referred to here as the pump chamber 6.
• a sickle or semi-crescent-shaped, multi-part separator 7 is arranged, which divides the pump chamber 6 in a suction chamber 8 and a pressure chamber 9.
• the suction chamber 8 communicates with a pump inlet 10, which is designed as a bore and transversely, ie axially parallel to the internal gear pump 1 from one side into the
• Suction chamber 8 of the pump chamber 6 opens.
• the pressure chamber 9 communicates with a pump outlet 11, which is designed in the embodiment as an arcuate slot and opens from one side into the pressure chamber 9 of the pump chamber 6.
• the arcuate pump outlet 1 1 is partially overlapped by the separator 7 and is in the circumferential direction a piece far over a pressure-side end of the separator 7 in the pressure chamber 9 of the pump chamber 6 via.
• the multi-part separator 7 has an arcuate inner part 12 and a likewise bow-shaped and bow-shaped outer part 13. A concave and zy-cylindrical inside of the inner part 12 is located on tooth tips of teeth of the
• Pinion 2 and the ring gear 3 fluid from the suction chamber 8 to the pressure chamber 9 is promoted.
• the pumped fluid is brake fluid.
• the outer part 13 has on its inside a recess in which the inner part 12 rests. At one in the direction of rotation P of the gears 2, 3 rear, ie the pressure chamber 9 facing the end, the outer part 13 of the separator 7 an inwardly directed angled portion 14, the P in the direction of rotation P rear end of the inner part 12 and engages behind.
• a step 15 Seen in the circumferential direction between a longitudinal center and a front in the direction of rotation P, ie the suction chamber 8 facing the outer end 13 in the recess in which the inner part 12 rests, a step 15, at which the recess of a tangential section in a outwardly extending radial section and then merges into a concavely curved, circumferentially extending section which leads to the rear end of the outer part 13. running.
• the inner part 12 bears against a counter-step 16.
• Both the bend 14 and the step 15 of the outer part 13 of the separator 7 extend radially to the réelle leopard- wheel pump 1, ie, a gap between the bend 14 and the step 15 decreases inwards.
• the inner part 12 can not be removed radially from the recess of the outer part 13.
• the angled portion 14 and the step 15 engage behind the rear end in the direction of rotation P and the counter-step 16 of the inner part 12. The play enables the inner part and the outer part 13 to move relative to one another in the radial direction of the internal gear pump 1.
• a leaf spring 17 is arranged, the inner part 12 and the outer part 13 apart and thereby the inner part 12 inwardly against the tooth tips of the teeth of the pinion and the outer part 13 outwardly against the tooth tips of the teeth of the ring gear 3 presses.
• the leaf spring 17 provides in particular at no pressure, for example, standing
• an elastic sealing element 18 between see in the circumferential direction surfaces of the inner part 12 and the outer part 13 a.
• the sealing element 18 seals between the inner part 12 and the outer part 13 of the separator 7, so that the pressure chamber 9 is sealed from the suction chamber 8.
• the abutting step 15 of the outer part 13 and counter 16 of the inner part 12 seal by their direct abutment from each other.
• This seal by direct contact can also be understood as a metallic seal, provided the inner part 12 and the Outer part 13 are made of metal.
• the location at which the sealing element 18 is located or the point at which the counter-stage 16 of the inner part 12 rests against the step 15 of the outer part 13 can also be regarded as a sealing point 19 at which the
• the elastic sealing member 18 pushes the inner part 12 and the outer part 13 apart and thus the inner part 12 inwardly against the tooth tips of the teeth of the pinion 2 and the outer part 13 outwardly against the tooth tips of the teeth of the ring gear 3.
• the Leaf spring 17 may be omitted.
• the separator 7 with the inner part 12, the outer part 13, the leaf spring 17 and the sealing element 18 form an assembly that is pre-assembled and used as a whole in the pump chamber 6 between the gears 2, 3 of the internal gear pump 1.
• Step 15 of the outer part 13 presses, holds the inner part 12, the outer part 13, the leaf spring 17 itself and the sealing element 18, which form the assembly, as which the separator 7 is formed together and counteracts a falling apart of the parts, as long as the separator 7 is not yet used in the pump chamber 6 of the internal gear pump 1.
• Contrary to the direction of rotation P, ie in the direction of the suction chamber 8 are the inner part 12 and the outer part 13 of the separator 7 via the sealing point 19 via, in each case by more than a tooth pitch of the teeth of the pinion 2 and the ring gear 3.
• the inner part 12 and the outer part 13 are by their supernatant counter to the direction of rotation P on the sealing point 19 in the direction of rotation behind the sealing point 19 in contact with the tooth tips of
• Teeth of the pinion 2 and the ring gear 3 is held.
• the internal gear pump 1 has pilot notches 20 through which tooth spaces between the teeth of the pinion 2 and the ring gear 3 communicate with the pressure chamber 9.
• the pilot notches 20 are in cross-section triangular-shaped grooves with a small cross-sectional area, which are mounted in side walls or thrust washers on which the pinion 2, the ring gear 3 and the separator 7 abut laterally.
• Other cross-sectional shapes of the pilot notches 20 are possible, for example rounded, square or rectangular, trapezoidal. Seen in the radial direction, the pilot notches 20 are located between the tooth tips and tooth roots of the teeth of the pinion 2 and the ring gear 3 and extend from the pressure chamber 9 a little way in the circumferential direction counter to the direction of rotation P of the gear wheels 2, 3.
• the pilot notches 20 taper in the opposite direction of rotation P and terminate in the direction of rotation P behind the sealing point 19.
• a cross section of the pilot notches 20 is so small that they act as throttles and restrict fluid flow from the pressure chamber 9 in the interdental spaces.
• a pressure in the interdental spaces in the direction of rotation P after the sealing point 19 increases continuously from the pressure of the suction chamber 8 to the outlet pressure in the pressure chamber 9.
• pilot-control notches 20 start in the direction of rotation P only behind the sealing point 19, a pressurization of the inner part 12 from the inside and the outer part 13 from the outside in the direction of rotation P in front of the sealing point 19 and thus a compression of the inner part 12 and the outer part 13 and lifting of the tooth tips of the teeth of the pinion 2 and the ring gear 3 to the front, the suction chamber 8 facing ends avoided.
• the pilot control notches 20 can generally also be understood as pilot control of the internal gear pump 1.
• the outer part 13 of the separator 7 is supported on a bolt which is arranged at the front end of the outer part 13 and the pump chamber 6 passes through transversely.
• the bolt which has a flattening for the abutment of the front end of the outer part 13 is referred to here as an abutment 21.
• the inner part 12 is supported with its counter stage 16 on the step 15 of the outer part 13 counter to the direction of rotation P against the pressurization in the pressure chamber 9 from. In the direction of rotation P, the inner part 12 is secured by the bend 14 of the outer part 13.
• the internal gear pump 1 is provided as a hydraulic pump of a hydraulic, slip-controlled and / or foreign-vehicle brake system, where it serves for slip control systems such as Bremsblockierschutz-, traction and / or vehicle dynamics controls and / or in hydraulic power-vehicle braking systems to brake pressure generation.
• slip control systems such as Bremsblockierschutz-, traction and / or vehicle dynamics controls and / or in hydraulic power-vehicle braking systems to brake pressure generation.
• Such hydraulic pumps are also referred to as recirculation pumps, although not necessarily true.
• ABS, ASR, FDR and ESP are common for the mentioned slip regulations.
• Vehicle dynamics regulations are colloquially referred to as anti-skid regulations.

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• 2013
  • 2013-04-19 DE DE102013207103.5A patent/DE102013207103A1/de not_active Withdrawn
• 2014
  • 2014-03-19 EP EP14711251.0A patent/EP2986478A1/de not_active Withdrawn
  • 2014-03-19 US US14/785,517 patent/US9470227B2/en active Active
  • 2014-03-19 WO PCT/EP2014/055534 patent/WO2014170083A1/de active Application Filing
  • 2014-03-19 JP JP2016508062A patent/JP6173561B2/ja active Active

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