US20170146008A1 - Pump for supplying an application system of a liquid covering product - Google Patents

Pump for supplying an application system of a liquid covering product Download PDF

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Publication number
US20170146008A1
US20170146008A1 US15/356,689 US201615356689A US2017146008A1 US 20170146008 A1 US20170146008 A1 US 20170146008A1 US 201615356689 A US201615356689 A US 201615356689A US 2017146008 A1 US2017146008 A1 US 2017146008A1
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US
United States
Prior art keywords
pistons
drum
cam profile
pump
pump according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/356,689
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English (en)
Inventor
Philippe De Talhouet
Romain Gaillet
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Exel Industries SA
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Exel Industries SA
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Assigned to EXEL INDUSTRIES reassignment EXEL INDUSTRIES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DE TALHOUET, PHILIPPE, Gaillet, Romain
Publication of US20170146008A1 publication Critical patent/US20170146008A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
    • 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
    • F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
    • 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
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • 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
    • F04B1/128—Driving means
    • 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
    • F04B1/14—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 stationary cylinders
    • 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
    • F04B1/14—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 stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/146—Swash plates; Actuating elements
    • 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
    • F04B1/14—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 stationary cylinders
    • F04B1/16—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 stationary cylinders having two or more sets of cylinders or pistons
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0058—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0058—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control
    • F04B11/0066—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control with special shape of the actuating element
    • 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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • F04B53/146—Piston-rod guiding arrangements
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/047—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being pin-and-slot mechanisms

Definitions

  • the invention relates to a pump for supplying an application system of a liquid covering product.
  • Electric pump for supplying application systems for liquid covering products such as paints are generally made up of an electric or pneumatic motor, a hydraulic pump and a coupling means connecting the motor to the pump.
  • Electric pump will refer to a supply pump having an electric motor and pneumatic pump, a pump having a pneumatic motor.
  • Electric pumps are preferably used due to their better performance and lower usage cost. The issue lies in converting the movement between the electric motor, which has a rotating movement, and the hydraulic pump, which has an alternating linear movement. When its movement direction is inverted, the piston of the hydraulic pump reaches a zero speed, which causes a drop in the pressure at the outlet of the pump. Electric pumps must therefore be provided to offset these inversions.
  • Pumps comprising a single piston actuated by a connecting rod-crank system are known. In these pumps, the rotation speed of the electric motor is controlled to obtain a constant flow rate. Pumps comprising a single piston actuated by a rack are known from US-A-2015/219819. The inversions are done on different teeth of the rack to reduce its wear. None of these systems make it possible to avoid a pressure drop at the outlet of the pump.
  • the invention aims to resolve these drawbacks by proposing a new pump for supplying an application system of a liquid covering product, allowing more effective compensation of the inversions of the pistons of the pump.
  • the invention relates to a pump for supplying an application system of a liquid covering product, comprising a motor actuating at least two pistons.
  • This pump is characterized in that it comprises a drum rotated by the motor, the drum comprising an outer cylindrical surface having a cam profile, in that each of the pistons is secured to a rod on which a roller is fastened rolling over the cam profile such that the roller connected to each of the pistons via one of the rods is translated along the translation axis of the corresponding piston under the action of the rotation of the drum, in that each of the rollers is in contact with the cam profile in an angularly offset position relative to the position of the other rollers such that one of the pistons is moving when the other piston reaches an inversion point of the movement direction, and in that it comprises compensating means suitable for accelerating one of the pistons when another piston reaches an inversion point of its movement direction.
  • the acceleration of one of the pistons during the inversion of another piston allows an effective compensation of the pressure drop.
  • the pressure obtained at the outlet of the pump is globally constant.
  • such a pump may incorporate one or more of the following features, considered in any technically allowable combination:
  • the compensating means comprise means for accelerating the rotation speed of the drum during a predetermined length of time before and after the passage of one of the pistons by its inversion point: in this embodiment, at the time of the inversions, the rotation speed of the motor increases, while the torque decreases, such that the power requested from the motor remains constant.
  • the acceleration means comprise a control unit of the motor.
  • the compensating means comprise a pressure sensor placed downstream from the pistons, and the acceleration means are suitable for increasing the rotation speed of the drum as a function of a pressure value measured by the pressure sensor.
  • the compensating means are formed by two angular sectors of the cam profile having an incline angle, relative to a plane perpendicular to the rotation axis of the drum, larger than an incline angle of a remaining angular sector of the cam profile.
  • the compensation is done while retaining a constant speed and motor torque.
  • the incline angle of the angular sectors of the cam profile forming the compensating means is twice the incline angle of the remaining angular sector of the cam profile.
  • the pump comprises two pistons angularly offset by 90°.
  • the cam profile comprises two helical slots each extending over half the circumference of the drum, and symmetrical relative to a plane passing through the rotation axis of the drum.
  • rollers are angularly offset by an angle comprised between 70° and 100°.
  • the offset angle of the rollers is 90°.
  • FIG. 1 is a perspective view of a pump according to a first embodiment of the invention
  • FIG. 2 is an enlarged view of detail II in FIG. 1 ;
  • FIG. 3 is a top view of the pump of FIGS. 1 and 2 ;
  • FIG. 4 is a sectional view along plane IV-IV in FIG. 3 ;
  • FIG. 5 is a curve showing the variation of the rotational speed as a function of the annular position of a motor of the pump of FIGS. 1-4 ;
  • FIG. 6 is a view similar to that of FIG. 4 and enlarged of a pump according to a second embodiment of the invention, in which only a drum and rollers of the pump are shown;
  • FIG. 7 is a view similar to FIG. 1 of a pump according to a third embodiment of the invention.
  • FIGS. 1-5 show a pump 1 for supplying an application system of a liquid covering product, not shown.
  • the pump 1 comprises an electric motor 3 with rotation axis X-X′.
  • the motor actuates two pistons 5 and 6 each mounted in a chamber 8 with the possibility of sliding along respective axes X 5 and X 6 parallel to the axis X-X′.
  • the movement of the pistons 5 and 6 in the chambers 8 makes it possible to deliver a pressurized liquid covering product, such as a paint.
  • the motor 3 actuates the pistons 5 and 6 via a transmission system comprising a drum 9 rotated by the motor 3 around the axis X-X′.
  • the transmission of the rotation from the motor 3 to the drum 9 can be direct or indirect, via a gear reduction system, not shown.
  • the drum 9 comprises an outer cylindrical surface 90 centered on the axis X-X′.
  • the outer surface 90 has a cam profile 92 .
  • Each of the pistons 5 and 6 is respectively secured to a first rod 51 and a second rod 61 on which a first roller 53 and a second roller 63 are fastened, each of the rollers 53 and 63 rolling over the cam profile 92 such that each of the rollers 53 and 63 connected to each of the pistons 5 and 6 via the rod 51 and 61 is translated parallel to the axis X-X′ under the action of the rotation of the drum 9 .
  • the cam profile 92 is formed by a continuous slot comprising two helical slots 94 and 95 each extending over half the circumference of the drum 9 , and symmetrical relative to a plane P 1 passing through the rotation axis X-X′ of the drum.
  • the slots 94 and 95 each comprise a respective cylindrical bottom 94 a and 95 a, upper helical walls 94 b and 95 b and lower helical walls 94 c and 95 c.
  • the rollers 53 and 63 are selectively in contact with one of the upper 94 b and 95 b or lower 94 c and 95 c helical walls, along contact lines perpendicular to the axis X-X′.
  • the motor 3 , the drum 9 and the rollers 53 and 63 appear twice due to the geometry of the cutting plane IV-IV.
  • the drum 9 rotates on itself around the axis X-X′
  • the contact between the helical walls 94 b, 95 b, 94 c, 95 c and the rollers 53 and 63 causes the translation of the rods 51 and 61 , which is transmitted to the pistons 5 and 6 , which makes it possible to alternately obtain the aspiration of the covering product, then its pressurized expulsion at the outlet of the pump 1 .
  • Each of the pistons 5 and 6 has a top dead center and a bottom dead center corresponding to the inversion points of its translational movement direction. During these inversions, the linear speed of the pistons 5 and 6 decreases, then passes by a zero value, which causes a cut in the pressure at the outlet of the pump. It is therefore necessary to offset the slowing of the speed of one of the pistons 5 and 6 when it reaches its inversion point with the movement of the other piston.
  • the contact point of one of the rollers 53 and 63 with the cam profile 92 is in an angularly offset position relative to the position of the contact point of the other rollers such that one of the pistons 5 and 6 is moving when the other piston is at an inversion point of its movement direction.
  • the respective positioning of the rollers 53 and 63 makes it possible, as shown in FIG. 4 , for the roller 53 to reach its top inversion point while the roller 63 is approximately midway through its upward movement. This makes it possible to partially offset the pressure drop due to the inversion of a piston.
  • the offset angle A of the rollers 53 and 63 is preferably comprised between 70° and 100°.
  • the offset angle A of the rollers is 90°.
  • This angle A is also the angle formed by the axes X 5 and X 6 relative to the axis X-X′.
  • the offset may not be 180°, since the pistons 5 and 6 would reach their inversion point at the same time and could not offset one another.
  • the rollers 53 and 63 are offset by a quarter revolution of the drum 9 , which means that the roller 53 reaches the boundary between the slots 94 and 95 while the roller 63 reaches the central part of the slot 95 , which corresponds to half of the travel of the piston 6 .
  • the pump 1 comprises compensating means suitable for accelerating one of the pistons 5 and 6 while the other piston reaches its inversion point.
  • the compensating means comprise means for accelerating the rotation speed of the drum 9 formed by a control unit 10 shown diagrammatically in FIG. 1 , during a predetermined length of time before and after the passage of one of the pistons 5 and 6 by its inversion point.
  • a control unit 10 shown diagrammatically in FIG. 1
  • the rotation speed of the drum 9 is accelerated by the control unit 10 so that the translation speed of the other piston is also accelerated, so as to allow the compensation of the slowing of the first piston.
  • This method is shown by the curve illustrated in FIG. 5 , which shows the evolution of the rotation speed V of the drum 9 as a function of the angular position of the drum 9 .
  • the speed profile is transmitted to the motor 3 by the control unit 10 in the form of an electrical signal S 10 .
  • an inversion of a piston 5 or 6 occurs, which leads to a compensation by the increase of the speed V around this angular position.
  • the rotation speed of the drum 9 can be increased from 5 to 10 revolutions per minute.
  • the control unit 10 is preferably an electronic unit performing an enslaved control of the rotation speed of the motor 3 .
  • the angle interval before and after the passage of the piston by the inversion point during which the speed of the drum 9 is increased may be comprised between 0.14 and 0.28 radians.
  • FIG. 6 A second embodiment of the invention is shown in FIG. 6 .
  • the elements shared with the first embodiment bear the same references and operate in the same manner. Only the differences with respect to the first embodiment are outlined below.
  • FIG. 6 only the drum 9 , in its two positions of the sectional view of FIG. 4 , and the rollers 53 and 63 are shown out of a concern for clarity.
  • the compensating means may comprise, to replace the means for accelerating the rotation speed of the drum 6 or concomitantly, two angular sectors 97 of the cam profile 92 whereof the incline angle A 97 , measured relative to a plane P 2 perpendicular to the rotation axis X-X′, is larger than the incline angle A 92 , called nominal, of a remaining angular sector of the cam profile 92 .
  • the remaining angular sector is defined as the portion of the cam profile 92 extending outside the angular sectors 97 .
  • An angular sector 97 with an accentuated incline is arranged on a central part of each of the slots 94 and 95 .
  • the rollers 53 and 63 being offset by 90°, the roller 53 reaches an inversion point, as shown on the left in FIG. 6 , while the roller 63 is in contact with the angular sector 97 , as shown on the right in FIG. 6 .
  • the translation speed along the axis X-X′ of the roller 63 is therefore increased owing to the increase in the slope of the walls 94 b, 95 b, 94 c and 95 c.
  • the acceleration of the piston 6 secured to the roller 63 therefore offsets the slowing and passage by the zero speed of the piston 5 . This makes it possible for the fact that one of the pistons 5 and 6 has reached its inversion point to cause only a relatively small variation in the output pressure of the pump 1 .
  • the value of the incline angle A 97 is preferably twice the value of the incline angle A 92 .
  • the position of the angular sectors 97 at the center of the slots 94 to 95 is related to the orientation of the rollers 53 and 63 at 90°.
  • the pump 1 may also comprise a pressure sensor 100 situated downstream from two hydraulic outlet conduits C 1 and C 2 of the pistons 5 and 6 , making it possible to measure the pressure at the outlet of the pump 1 and to measure the pressure drop following the approach of one of the pistons to an inversion point.
  • the pressure sensor 100 which is comprised in the compensating means, is connected to the control unit 10 , or to any other means suitable for increasing the rotation speed of the drum 9 as a function of the pressure value, measured by the pressure sensor 10 and sent to the control unit 10 in the form of an electrical signal SP.
  • the triggering of the acceleration of the speed of the drum 9 may be subject to the passage, by the value of the outlet pressure, below a threshold value, for example equal to 15 bars.
  • the pump 1 may comprise more than two pistons.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US15/356,689 2015-11-25 2016-11-21 Pump for supplying an application system of a liquid covering product Abandoned US20170146008A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1561346A FR3044052B1 (fr) 2015-11-25 2015-11-25 Pompe d'alimentation d'un systeme d'application d'un produit de revetement liquide
FR1561346 2015-11-25

Publications (1)

Publication Number Publication Date
US20170146008A1 true US20170146008A1 (en) 2017-05-25

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US15/356,689 Abandoned US20170146008A1 (en) 2015-11-25 2016-11-21 Pump for supplying an application system of a liquid covering product

Country Status (6)

Country Link
US (1) US20170146008A1 (fr)
EP (1) EP3173621B1 (fr)
JP (1) JP2017110638A (fr)
KR (1) KR20170061090A (fr)
CN (1) CN107051832B (fr)
FR (1) FR3044052B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190128245A1 (en) * 2016-05-06 2019-05-02 Active Tools International (Hk) Ltd. Compressor
CN112879261A (zh) * 2021-03-01 2021-06-01 胡兵 一种超高扬程的混凝土输送泵
CN113841292A (zh) * 2019-10-09 2021-12-24 长野自动机械株式会社 供给液体的装置
US20230106780A1 (en) * 2021-10-01 2023-04-06 Board Of Regents, The University Of Texas System Reciprocating Pump

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019123734A1 (de) * 2019-09-04 2021-03-04 Henke-Sass, Wolf Gmbh Vorrichtung zum Applizieren eines Fluids
WO2023077492A1 (fr) * 2021-11-07 2023-05-11 Oms Investments, Inc. Pompe à fluide
CN115013283A (zh) * 2022-07-06 2022-09-06 浙江千机智能科技有限公司 动力设备

Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN113841292A (zh) * 2019-10-09 2021-12-24 长野自动机械株式会社 供给液体的装置
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CN112879261A (zh) * 2021-03-01 2021-06-01 胡兵 一种超高扬程的混凝土输送泵
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FR3044052B1 (fr) 2019-09-13
EP3173621B1 (fr) 2019-03-06
FR3044052A1 (fr) 2017-05-26
KR20170061090A (ko) 2017-06-02
CN107051832A (zh) 2017-08-18
JP2017110638A (ja) 2017-06-22
CN107051832B (zh) 2021-03-12
EP3173621A1 (fr) 2017-05-31

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