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
  • 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
  • F04B53/001—Noise damping
  • F04B53/003—Noise damping by damping supports
• • 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
  • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
  • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
  • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
  • F04B1/2014—Details or component parts
  • F04B1/2064—Housings
• • 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
  • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
  • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
  • F04B39/121—Casings
• • 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
  • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
  • F04B39/14—Provisions for readily assembling or disassembling
• • 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
  • F04B53/001—Noise damping
• • 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

Definitions

• the present invention relates to a rotating hydraulic machine for a hybrid motor vehicle, and a hybrid vehicle equipped with such a hydraulic machine.
• a known type of hydraulic barrel machine presented in particular by the document US-A-5358388, comprises on the side conventionally called front side, a motorized input shaft which rotates a cylinder having a succession of parallel cylinders or slightly inclined, distributed around the axis of this tree.
• Each cylinder receives a piston bearing axially on the front side on an inclined plate, which is fixed in rotation around the shaft of the machine, by means of a bearing forming an axial stop.
• the inclination of this plate on an axis perpendicular to the shaft of the hydraulic machine can be fixed, or variable to change the displacement of the hydraulic machine.
• a turn of rotation of the barrel gives each piston a movement following a complete cycle comprising a stroke depending on the angle of inclination of the plate, which is adjustable by a tilt control.
• the rear face of the barrel, opposite to the tilting plate, is supported on a fixed circular plate closing the end of the cylinders, held by a cover, which comprises low and high pressure collectors.
• These machines can generally operate as motor or pump.
• the displacement can be fixed, with an inclination angle of the plate which is constant.
• rotating machines usually comprise a casing forming a body containing the cylinders, having a front transverse face of support and attachment to a support, and a rear transverse face receiving the plate having the collectors of the fluid.
• the support receiving the rotating hydraulic machine has holes each receiving a screw engaged in a bore of a crankcase lug, which is tightened by the screw head or by a nut, bearing against this leg.
• This type of fastener is dimensioned to obtain a mechanical strength, and a fatigue resistance during the life of the machine.
• the casing of the machine equipped with this type of attachment comprises vibratory modes that can be activated by the different pulsations during operation of the rotating machine.
• a problem that arises is that it can be obtained according to the speed of rotation and the hydraulic pressure, siren noise emitted by these vibratory modes.
• this type of rotating hydraulic machine generally designed for industrial applications, with an acceptable sound level in this area, may be unsuitable for use in a hydraulic hybrid motor vehicle where the noise constraints are important to ensure the comfort of passengers.
• the present invention is intended to avoid these disadvantages of the prior art.
• a rotating hydraulic machine comprising a housing containing pistons actuated by an input shaft, this housing having a transverse front face provided to bear on a support, and a transverse rear face receiving a rear cover supporting collectors connected to these pistons, the housing comprising lateral fastening tabs each having an axial bore terminating in a rear clamping surface, designed to receive a clamping element of this machine on the support, characterized in that at least one leg forms an axially elongated boss, whose height is greater than half the length of this housing between its front and rear.
• the rotating hydraulic machine according to the invention may further comprise one or more of the following features, which may be combined with one another.
• the bosses comprise the two axial ends which are aligned on the front or rear transverse face of the housing.
• the bosses may comprise a front end recessed relative to the front transverse face.
• the bosses may also include a rear end set back relative to the rear transverse face.
• the rear cover may comprise bosses aligned with those of the housing, the axial clamping means passing through these two aligned bosses.
• the two aligned bosses are supported on one another at the rear transverse face.
• the invention also relates to a hydraulic hybrid vehicle comprising a traction chain equipped with a rotating hydraulic machine, which comprises any of the preceding characteristics.
• FIG. 1 is an axial sectional view of a rotating hydraulic machine according to the prior art
• FIG. 2 is an external view of a rotary machine of this type, according to the prior art
• FIG. 3 is an external view of a rotary machine of this type, according to the invention.
• FIG. 4 is a diagram comparing the acoustic emissions of these two rotating machines.
• FIGS. 5, 6 and 7 are diagrams showing three types of mounting bosses for a rotating machine according to the invention.
• FIG. 1 shows a hydraulic machine that can rotate in both directions of rotation, comprising a generally cylindrical casing 2 closed on the rear side by a cover 4.
• the casing 2 and the cover 4 each support a tapered roller bearing 8 guiding a d 6 input disposed along the axis of this body.
• a barrel 12 rotatably connected to the input shaft 6, comprises nine cylinders 14 parallel to the axis and distributed around this axis.
• Each cylinder 14 contains a piston 16, whose front end is supported by an axial stop 18 on a tilting plate 20 which can pivot about an axis O perpendicular to the input shaft 6, under the effect of a jack hydraulic control 22 and a return spring 26.
• the rear side of the barrel 12 is supported on a transverse circular plate 24 having orifices arranged in front of low and high pressure collectors formed in the cover 4 which holds this plate, to close the rear end of the cylinders 14.
• the casing 2 has a transverse front face 28 intended to bear on a support, and lugs 30 projecting laterally from this front face, comprising a small axial height, and each having an axial bore 32 receiving a clamping screw on this support .
• the casing 2 has an axial length L which is the distance between its front face 28 and the rear face 34 receiving the support of the cover 4.
• Figure 2 shows a hydraulic machine comprising five visible tabs 30, distributed below, on the left side and above the housing 2, to ensure a regular tightening of the front of this machine on a support.
• Each of these legs 30 come cast during molding of the casing 2, has a low height which is calculated to be sufficient to ensure mechanical strength of the machine.
• FIG. 3 shows the same hydraulic machine comprising the two lower tabs and the two upper tabs forming an axially elongate boss, which extends over the entire length L of the casing 2.
• bosses 40 protruding laterally outside the cover 4, the rear support face of these bosses is free to receive the support of an axial clamping means on the support, as the head of a screw inserted into the bore 32 , as well as a screwdriver bit.
• the lug 30 disposed on the left side of the housing 2 does not form an elongated boss, because the volume available behind this lug does not allow the passage of a screwdriver bit.
• FIG. 4 shows, as a function of the speed of rotation of the input shaft, expressed in rpm on the horizontal axis, the level of noise emission expressed in decibels on the vertical axis.
• Curve 50 shows the sound emission for the hydraulic machine according to the prior art shown in FIG. 2, and curve 52 for the modified hydraulic machine according to the invention, shown in FIG. 3. There is a gain of approximately 5 dB in the range. speed between 1000 and 3000trs / min.
• FIG. 5 shows a hydraulic machine comprising two bosses 40 comprising a height H equal to the length L of the casing 2, each traversed by an axial clamping screw 60.
• FIG. 6 shows a hydraulic machine comprising bosses 40 having a front end a little behind the front face 28 of the casing 2, and a rear end also set back from the rear face of this casing.
• the two bosses 40 have a height H greater than half the length L of the housing 2.
• FIG. 7 shows a hydraulic machine comprising two bosses 40 comprising a height H equal to the length L of the casing 2, each extending towards the rear by an aligned complementary boss 62 disposed on the rear cover 4.
• Each clamping screw 60 crosses the two aligned bosses 40, 62, which bear against one another at the rear transverse face 34.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Reciprocating Pumps (AREA)
• Details Of Reciprocating Pumps (AREA)
• Rotary Pumps (AREA)
• Hybrid Electric Vehicles (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=51866276

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (12)

• 2014
  • 2014-10-02 FR FR1459413A patent/FR3026793B1/fr not_active Expired - Fee Related
• 2015
  • 2015-09-09 US US15/513,088 patent/US10344755B2/en not_active Expired - Fee Related
  • 2015-09-09 CN CN201580053043.9A patent/CN106715901B/zh not_active Expired - Fee Related
  • 2015-09-09 JP JP2017516916A patent/JP6673907B2/ja not_active Expired - Fee Related
  • 2015-09-09 EP EP15771193.8A patent/EP3201467B1/de not_active Not-in-force
  • 2015-09-09 WO PCT/FR2015/052393 patent/WO2016051037A1/fr not_active Ceased

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