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
  • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
  • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
  • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
  • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
  • F01C21/08—Rotary pistons
  • F01C21/0809—Construction of vanes or vane holders
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
  • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
  • F01C21/08—Rotary pistons
  • F01C21/0809—Construction of vanes or vane holders
  • F01C21/089—Construction of vanes or vane holders for synchronised movement of the vanes
• • 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
  • F04C29/06—Silencing
• • 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
  • F04C2270/13—Noise
• • 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
  • F04C2270/14—Pulsations
• • 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
  • F04C2270/15—Resonance

Definitions

• the invention relates to the field of acoustics and vibration for rotary pumps in motor vehicles, such as vane pumps.
• the vane pump allows the transfer of a pumped fluid, thanks to a plurality of pallets, secured to a rotor in rotation around a stator, the pallets sliding radially via a set of springs and under the effect of centrifugal force.
• a pallet pump in a motor vehicle is in the form of:
• an oil pump constituting the lubrication system of a heat engine, permitting the supply of crankshaft oil, as well as the various elements of this engine;
• hydraulic pump constituting a hydraulic machine for a hybrid vehicle equipped with such a machine.
• rotary pumps which can be realized in the form of vane pumps, such as those presented above, but also in the form of radial or axial piston pumps, screw pumps, or gear pumps.
• a problem commonly known rotary pumps lies in the sound of siren emitted by them.
• a pump uniformly distributed blades periodically emits harmonics, because the blades of this pump succeed each other regularly. This results in an acute noise dominating the overall noise of this pump, which can be felt as annoying by the driver and passengers of the vehicle.
• siren noise there are many solutions in the current state of the art.
• the document FR2666124 describes a pump with vanes or internal gears, the rotary elements of which are designed so that for each discharge cell, either a minimum and / or maximum volume value or a different yield.
• Such an embodiment like those of the current technological background, has the sole purpose of reducing the overall noise of rotating pumps and / or limit siren noise.
• the realization of these solutions therefore remains subject to the acoustic specifications of the car manufacturer, and the costs of research induced. As a result, the overall performance of these pumps is therefore limited.
• a first objective is to overcome all the aforementioned drawbacks.
• a second objective is to minimize the siren noise of rotary pumps.
• a third objective is to reduce the overall noise stress imposed on rotary pumps by specifications, and thus allow the realization of rotary pumps at lower costs.
• a fourth objective is to modify the color of the noise of the rotary pumps, and therefore the perception of this noise by the driver and the passengers of a vehicle, in order to alleviate the overall noise constraint imposed during the realization. of these pumps.
• a fifth objective is to provide rotary pumps whose noise color approaching closer to the noise of a heat engine, so as to raise the maximum acceptable overall acceptable noise, and thus improve the performance of these pumps.
• a vane pump comprising a stator, a suction port and a fluid discharge port made through the stator, respectively allowing suction and discharge.
• a fluid through the pump a rotor eccentric relative to the stator and rotating around the latter, each pallet having an angular offset from a theoretical position for which this pallet would present, with all other pallets of the pump, a regular angular distribution by relative to a center, the angular offset of the pallets according to a pseudo-random binary sequence, a "1" or "0" bit of this sequence respectively corresponding to an angular offset of a pallet in a first direction of rotation or in a second direction of rotation opposite to the first direction of rotation, this binary sequence being calculated via a scrambler sequence scrambling method, this method being an additive method applying a pseudo-random binary sequence PRBS.
• the bits "1" and "0" of the binary pseudo-random sequence PRBS delimit a range of angular offset range for the pallets.
• the limit extent of the range of angular offset of the pallets is determined as a function of an unbalance induced by the pallets.
• this vane pump comprises seven pallets, each pallet having an angular offset according to the following binary sequence: 1; 0; 0; 1; 0; 1; 1.
• the extent of the angular offset range of the pallets is at least 5 °.
• the pallets are angularly offset in a pseudo-random binary sequence PRBS 2 3 , this sequence comprising respectively the same number of bits as pallets.
• this vane pump comprises pallets, with a> 8
• the pallets are angularly offset in a pseudo-random binary sequence PRBS 2 k , with 2 k " + 1 ⁇ n ⁇ 2 k and an integer k> 3, the pseudo-random bit sequence comprising respectively the same number of bits as pallets.
• the vane pump is an oil pump constituting a lubrication system.
• FIG. 1 is a perspective view of a vane pump
• Figure 2 is a sectional view of the same vane pump
• Figure 3 is a sectional view of a vane pump according to one embodiment.
• FIG. 1 a pump 100 with vane 1.
• the pump 100 vane 1 allows the transport of a fluid, such as oil. However, any other fluid can be transported via such a pump, for example water or fuel.
• the vane pump 100 is formed from the following elements:
• stator 2 fixed in the body of the pump 100 the body of the pump is, for example, a cast iron body;
• the movable elements for such a pump 100 are here pallets 1 (or blades) integral with the rotor 5, these pallets 1 sliding radially in grooves 6 of the rotor 5.
• the pallets 1 are of rectangular or trapezoidal shape, of small thickness, and slide in the grooves 6 of the rotor 5 via a set of springs.
• each spacing between two successive pallets 1 forms a cell 7 for the transport of a fluid.
• each cell 7 may or may not be sealed.
• the eccentricity of the rotor 5 relative to the stator 2 allows the creation of a circular ring in the pump 100, the volume of this ring being distributed between the different cells 7.
• each cell 7 relates to a different volume depending on the angular position of the pallets 1 delimiting it.
• the longitudinal axes of the pallets 1 of the rotor 5 are regularly arranged and aligned with respect to the center Cr of the rotor 5, thus having regular angular distributions.
• Such an even distribution of the pallets 1 then induces a predominant siren noise in the pump 100.
• each pallet 1 of the pump 100, and its respective groove 6, has an angular offset with respect to a theoretical position for which this pallet 1 would present, with the all other pallets 1 of the pump 100, a regular angular distribution with respect to a center.
• This theoretical angular distribution is, for example, carried out with respect to the center Cr of the rotor 5, with respect to the center Cs of the stator 2, or relative to any other predetermined point.
• FIG. 3 An exemplary embodiment for a pump 100 to seven pallets 1 is illustrated in Figure 3.
• the pallets 1, and their groove 6, have an angular offset from the center Cr of the rotor 5. It can be seen from this figure, by comparison with FIG. 2, that the pallets 1 are offset angularly with respect to an equiangular pallet configuration 1 (without angular displacement).
• the sequence scrambling method commonly known as the Scrambler method (denomination used hereinafter) is implemented to determine the angular offset of each pallet 1, according to a binary sequence. pseudo-random generated via this method.
• the angular offset of the pallets 1 according to a binary sequence generated via the Scrambler method allows, from an acoustic point of view, the vane pump 100 1: to approach as closely as possible the noise coloration of a combustion engine of a motor vehicle;
• the scrambler sequence scrambling method makes it possible to eliminate the dependence of the acoustic power spectrum of the pump 100 on the original signal, here the harmonics of the vane pump 100, making this spectrum more dispersed, and spreading the maximum acoustic energy, which remains constant, over a wider frequency band.
• the additive Scrambler method has been identified here as presenting the best results for approaching the noise coloration of an automotive heat engine. This method was therefore used to determine the angular offset specific to each pallet 1 of the pump
• the pump 100 to seven pallets 1 of Figure 3 has angular shifts of pallets 1, determined according to the additive Scrambler method, via the application of a binary pseudo-random sequence PRBS.
• the term "pseudo-random" means, here, that each bit of the binary sequence is independent of the others, but that this sequence is periodic, therefore deterministic.
• the angular position of a pallet 1 corresponds respectively to a single bit of the sequence PRBS 2 3 .
• a bit sequence is chosen that comprises the same number of bits as pallets 1.
• the binary sequence with seven values 1 is used; 0; 0; 1; 0; 1; 1.
• the angular position of each pallet 1 is then a function of this pseudo-random sequence of bits. More precisely, each bit of this sequence corresponds respectively to an angular offset of a pallet 1.
• This angular offset is defined with respect to a theoretical position for which this pallet 1 would present, with all the other pallets 1 of the pump 100. , a regular angular distribution with respect to a center. This center is, for example, the center Cr of the rotor 5, the center Cs of the stator 2, or any other predefined point.
• each bit "1" at an angular offset of a pallet 1 in a first direction for example the direction R of rotation of the rotor 5;
• the angular offsets of the pallets 1, symbolized by curved arrows follow. the binary sequence with seven values 1; 0; 0; 1; 0; 1; 1 of the pseudo-random binary sequence PRBS 2 3 .
• each pallet 1 is located at each end at an end of an angular offset range delimited by the angular offset values associated with the bits "0", "1" of the pseudo-random binary sequence PRBS. .
• the values setting the total extent of this range of angular offset are chosen according to a maximum unbalance allowed by the pump 100. This unbalance can, for example, be determined theoretically, or experimentally, according to the different possibilities of combinations of angular offsets of pallets 1.
• the greater the allowed angular offsets the greater the angular distribution of the pallets 1 is effective on the attenuation of the siren noise.
• the bits "1", "0" of the bit sequence are assigned an angular offset value to be applied to the pallets 1, these values being chosen according to the feasible / allowed extent of the offset range.
• the pump 100 with seven pallets 1 of FIG. 3 it is possible to choose the following ranges of angular ranges:
• a range of angular offset range of 4 ° for example by replacing the bits “0" and “1” of the binary sequence PRBS by the values of angular offsets "-2 ° and 2 °", “-1 ° and 3 ° ",” 0 ° and 4 ° “or” -3 ° and 1 0 ";
• a range of angular offset range of 5 ° for example by replacing the bits “0" and “1” of the binary sequence PRBS by the values of angular offsets "-2.5 ° and 2.5 °", “-2 ° and 3” ° ",” 0 ° and 5 ° “or” -3 ° and 2 ° ";
• PRBS 2 3 pseudo-random binary sequences PRBS 2 3 of one to eight values (sequences previously highlighted) for pumps 100 with pallets 1 comprising respectively one to eight pallets 1 is favored. from the eighth value of the sequence PRBS 23 , a "repetition" of bits related to its periodicity.
• PRBS 23 a "repetition" of bits related to its periodicity.
• the angular offset of the pallets 1 of the pump 100 according to a sequence of the scrambler additive scrambler sequence applying a pseudo-random binary sequence PRBS is applicable to a number n. any pallets 1.
• the angular offset of the pallets 1 respectively follows a pseudo-random binary sequence PRBS
• the angular offset of the pallets 1 preferably follows a pseudo-random binary sequence PRBS 25 in order to obtain optimal results.
• PRBS May 2 are highlighted below Preferred sequences for a pump 100 comprising seventeen to twenty respectively pallets 1.
• other sequences may also be used, but present less good results to approximate the motor staining,
• the embodiments described above refer to a pump 100 with vane 1. Nevertheless, the siren noise rotary pumps is known to result, more generally, movable elements integral with the rotor 5 when these elements have a constant angular distribution. Thus, to reduce this noise, the embodiments described above are applicable not only to the vane pumps 1, but also to pumps having similar structures, namely radial movable elements integral with the rotor 5.
• the angular offset of mobile elements of a rotor 5, according to the scrambler sequence scrambling method, via the application of a pseudo-random binary sequence PRBS, is particularly applicable to the following rotary pumps: radial piston pumps, by applying the shift method angular proposed to the pistons of these pumps;
• centrifugal pumps by applying the proposed angular offset method to the vanes of these pumps;
• the angular disposition of pallets 1 proposed below is applicable to any pump 100 with pallets 1 embedded in a motor vehicle.
• the pump 100 to pallets 1 previously described is a:
• Oil pump constituting the lubrication system of a heat engine, allowing the oil supply of the crankshaft, as well as the various elements of the engine;
• the embodiments proposed above make it possible both to reduce the siren noise of the rotary pumps and to approach the coloration of the engine noise of a vehicle, such as a heat engine.
• a vehicle such as a heat engine.
• the noise of a pump 100 with pallets 1 merges with the noise of the engine.
• the embodiments described above allow car manufacturers, to reduce the constraints of acoustic criteria rotary pumps with mobile radial elements, thus allowing suppliers of this type of pumps to optimize their performance, as well as the associated achievement costs.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Details And Applications Of Rotary Liquid Pumps (AREA)
• Rotary Pumps (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=52808061

Family Applications (1)

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Family Cites Families (12)

• 2015
  • 2015-03-02 FR FR1551727A patent/FR3033370B1/fr active Active
• 2016
  • 2016-02-16 CN CN201680012956.0A patent/CN107438699B/zh not_active Expired - Fee Related
  • 2016-02-16 WO PCT/FR2016/050350 patent/WO2016139400A2/fr not_active Ceased
  • 2016-02-16 EP EP16707923.5A patent/EP3265652A2/de not_active Withdrawn

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