US20050244276A1 - Pump drive - Google Patents

Pump drive Download PDF

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Publication number
US20050244276A1
US20050244276A1 US11/139,911 US13991105A US2005244276A1 US 20050244276 A1 US20050244276 A1 US 20050244276A1 US 13991105 A US13991105 A US 13991105A US 2005244276 A1 US2005244276 A1 US 2005244276A1
Authority
US
United States
Prior art keywords
rotary
movement
piston
pump drive
pump
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
US11/139,911
Other languages
English (en)
Inventor
Jean-Francois Pfister
Joel Niklaus
Christophe Dexet
Vincent Froidevaux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Industrielle de Sonceboz SA
Original Assignee
Societe Industrielle de Sonceboz SA
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 Societe Industrielle de Sonceboz SA filed Critical Societe Industrielle de Sonceboz SA
Assigned to SOCIETE INDUSTRIELLE DE SONCEBOZ S.A. reassignment SOCIETE INDUSTRIELLE DE SONCEBOZ S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DEXET, CHRISTOPHE, FROIDEVAUX, VINCENT, NIKLAUS, JOEL, PFISTER, JEAN-FRANCOIS
Publication of US20050244276A1 publication Critical patent/US20050244276A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • 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
    • 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

Definitions

  • the present invention concerns a membrane or piston pump drive, with a stepping motor.
  • the stepping motor has the advantage of making it possible, through electronic means, to better control the pumped fluid output, since the stepping motor allows fine control of the speed of rotation of the motor, and makes it possible to know the angular position of the rotor without requiring any external sensor for this purpose.
  • the pumped fluid output can be varied by changing the speed of rotation of the rotor of the motor, which varies the reciprocating frequency of the piston coupled to the rotor through a cam mechanism.
  • the variation in the reciprocating frequency of the piston may have a detrimental influence on the variation in pressure in the pumped fluid, depending on the harmonic frequencies of the hydraulic system in which the pump is placed and the degree of damping of the pulsations or other factors.
  • An object of the invention is to provide a piston or membrane pump drive that can be regulated with precision over an extended operating range.
  • Aims of the invention are achieved by the piston or membrane pump drive according to claim 1 .
  • a membrane or piston pump drive comprises a stepping motor, a step-down device, and a mechanism for converting the rotary movement into a translation (or linear) movement comprising a rotary member and a piston member intended to move a piston or a membrane of the pump, the stepping motor comprising a rotor coupled, through the step-down device, to the rotary member which engages the piston or membrane in order to drive it in an essentially linear reciprocating movement, wherein the stepping motor and the translation device are adapted to perform a reciprocating angular movement of said rotary member over an angle of less than 360°.
  • the rotary-to-linear conversion device can comprise a cam element on the rotary part, engaging a complementary cam on the member with essentially linear movement.
  • the angle of rotation of the rotary cam element defines the magnitude of the linear movement of the piston member.
  • the angle of rotation of the cam is regulated electronically by control of the stepping motor in the same way as the control of speed and acceleration of the motor, without requiring regulation of mechanical members.
  • the output of the pump can thus be varied not only by changing the reciprocating frequency of the piston but also its magnitude by means of an electronic control for the stepping motor, which makes it possible to optimise the functioning of the pump over a wide range of values, that is to say for large and small outputs, by controlling the magnitude and/or the frequency.
  • the transmission of the motor torque through the gearbox means that the rotor of the motor can make several turns before changing direction. This makes it possible to obtain a finer control of the angular movement, in view of the reduction in the movement through the gearbox, and to better control the deceleration and acceleration ramp, in particular when changing the direction of rotation.
  • FIG. 1 is a perspective view of a piston or membrane pump drive according to the invention
  • FIG. 2 a is a plan view of the pump drive showing a first extreme position of the movement of the piston
  • FIG. 2 b is a view similar to FIG. 2 a showing the piston in the second extreme position
  • FIG. 3 is a view of the drive in the direction III in FIG. 2 b , with a support plate in addition;
  • FIG. 4 is a section along the line IV-IV in FIG. 2 a with a support plate in addition.
  • a pump drive 1 comprises a stepping electric motor 2 with a wound stator 3 and a rotor 4 , a step-down device 5 , a device 6 for converting the rotary movement into an essentially linear movement, and a piston member 7 .
  • the gearbox 5 comprises gearwheels 8 , 9 , 10 , 11 effecting a reduction of the transmission ratio between the shaft 12 of the rotor and the output shaft 13 of the gearbox.
  • the rotary-to-linear conversion mechanism 6 comprises a cam element 14 fixed to the output shaft 13 of the step-down device and engaging a complementary cam element 15 , in the form of a free wheel, mounted on the piston member 7 .
  • the piston member 7 is mounted in a bearing 16 of a body or support 17 for the drive in order to guide the piston member in a translation movement along an axis A.
  • the cam member 14 is, in this example, in the form of an essentially flat disc comprising an opening 18 whose periphery 19 , or at least a portion of periphery, has the function of a cam surface engaging the complementary cam element 15 mounted on the piston member 7 for the movement of the latter in a reciprocating manner when the rotary cam member 14 performs an angular reciprocating movement.
  • the profile of the cam surface 20 defined by the angular position of each point on the surface and its radial distance with respect to the rotation axis of the member 14 , defines the axial position of the piston member 7 .
  • the first extreme angular position 20 a of the cam profile corresponds to an extreme axial position of the piston member and the other extreme angular position 20 b of the cam surface corresponds to the extreme axial position of the piston member in the other direction.
  • the movement of the cam member between the extreme angular positions 20 a , 20 b therefore corresponds to the maximum amplitude of the piston member.
  • the opposite surfaces 20 c , 20 d of the cam make it possible to push and pull the piston member without requiring a recoil spring, which reduces the wear by friction and decreases the number of components.
  • the opposite cam surfaces also make it possible to effect high accelerations and decelerations.
  • the output of the pump may advantageously be varied by acting on the number of steps performed by the rotor of the stepping motor before the change in direction, by an electronic control counting the number of steps and controlling the deceleration, the stoppage and the acceleration in the other direction of the rotor of the stepping motor. It is also possible to vary the pumped output by varying the speed of movement of the piston member by electronically controlling the frequency of the steps of the stepping motor.
  • an asymmetric speed profile of the reciprocating movement by controlling, by means of the electronic control, the movement in a rotation direction with a step frequency different from the frequency in the other direction of rotation.
  • An asymmetric movement profile can be very advantageous for optimising the suction and expulsion of the liquid by the piston according to the characteristics of the pump and the hydraulic system, for example in order to avoid cavitation during suction and impacts or vibration during expulsion.
  • a stepping motor has not only the advantage of allowing very reliable and precise electronic control of the amplitude and frequency according to a required speed profile, but also makes it possible to generate a high torque at relatively low rotation speeds.
  • the electronic control of the motor can be effected through a low noise motor driver in order to avoid the known resonances of the stepping motor and also to optimise the efficiency of the motor. It is therefore possible to reduce heating of the drive by varying the current according to the operating state, for example by cutting off the current when the motor is stopped, reducing the current during the suction cycle of the pump in the case of low pressure, and supplying a high or nominal current during the expulsion cycle of the pump in a situation of high hydraulic pressure.
  • the step-down device makes it possible to reduce the bulk of the motor while improving the acceleration and deceleration ramps of the motor, as well as the precision in positioning of the cam member, consequently the amplitude and frequency of movement of the piston member.
  • the step-down device also makes it possible to absorb impacts, in particular during changes in direction.
  • the output shaft 13 of the step-down device is provided with a bearing in the form of a compact needle bearing 21 .
  • the complementary cam element 15 of the piston member 7 is also mounted on a bearing in the form of a needle bearing 22 in order to reduce the friction between the cam surface 20 and this part.
  • the complementary cam element 15 has a diameter slightly less than the radial distance separating the surfaces of the opposite cams 20 c , 20 d , this small clearance preventing rubbing of the complementary cam element against the cam surface opposite to the engaging cam surface.
  • a cam system it is also possible to convert the rotary movement at the output of the step-down device by a connecting rod system, that is to say where the piston member is connected to a disc fixed to the output shaft of the step-down device by an articulation coupled pivotally to the disc and to the piston member.
  • the piston member does not necessarily need to perform a pure translation movement, provided that there is a movement component in a direction perpendicular to the overall plane of the membrane in order to vary the pump volume.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Transmission Devices (AREA)
  • Valve Device For Special Equipments (AREA)
  • Seal Device For Vehicle (AREA)
US11/139,911 2004-04-06 2005-05-27 Pump drive Abandoned US20050244276A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04405346.0 2004-04-06
EP04405346A EP1602826B1 (de) 2004-06-04 2004-06-04 Pumpenantrieb

Publications (1)

Publication Number Publication Date
US20050244276A1 true US20050244276A1 (en) 2005-11-03

Family

ID=34932133

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/139,911 Abandoned US20050244276A1 (en) 2004-04-06 2005-05-27 Pump drive

Country Status (4)

Country Link
US (1) US20050244276A1 (de)
EP (1) EP1602826B1 (de)
AT (1) ATE365868T1 (de)
DE (1) DE602004007247T2 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1954946A2 (de) * 2005-11-21 2008-08-13 Entegris, Inc. System und verfahren zur positionssteuerung eines mechanischen kolbens in einer pumpe
US20100308670A1 (en) * 2010-02-18 2010-12-09 Oscilla Power Inc. Electrical generator that utilizes rotational to linear motion conversion
US8029247B2 (en) 2005-12-02 2011-10-04 Entegris, Inc. System and method for pressure compensation in a pump
US8083498B2 (en) 2005-12-02 2011-12-27 Entegris, Inc. System and method for position control of a mechanical piston in a pump
US8087429B2 (en) 2005-11-21 2012-01-03 Entegris, Inc. System and method for a pump with reduced form factor
US8172546B2 (en) 1998-11-23 2012-05-08 Entegris, Inc. System and method for correcting for pressure variations using a motor
US8292598B2 (en) 2004-11-23 2012-10-23 Entegris, Inc. System and method for a variable home position dispense system
US8382444B2 (en) 2005-12-02 2013-02-26 Entegris, Inc. System and method for monitoring operation of a pump
US8753097B2 (en) 2005-11-21 2014-06-17 Entegris, Inc. Method and system for high viscosity pump
US9631611B2 (en) 2006-11-30 2017-04-25 Entegris, Inc. System and method for operation of a pump
CN110285052A (zh) * 2019-08-07 2019-09-27 东莞吉研达自动化设备科技有限公司 一种智能变量泵
US20200094803A1 (en) * 2018-09-26 2020-03-26 Acer Incorporated Brake system
US11698059B2 (en) * 2018-12-29 2023-07-11 Biosense Webster (Israel) Ltd. Disposable dual-action reciprocating pump assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113562385B (zh) * 2020-04-29 2023-06-13 亚泰半导体设备股份有限公司 抽液***

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326837A (en) * 1978-12-15 1982-04-27 Gilson Medical Electronics Pumping apparatus using a stepping motor
US4566868A (en) * 1980-09-17 1986-01-28 Geotechnical Digital Systems Limited Pressure source
US4643649A (en) * 1984-07-20 1987-02-17 The Perkin-Elmer Corporation Digital control for rapid refill of a liquid chromatograph pump
US4925371A (en) * 1987-12-17 1990-05-15 Dosapro Milton Roy Flow rate control for a variable stroke pump
US4930991A (en) * 1988-02-10 1990-06-05 Gilson Medical Electronics (France) Piston pump for high performance liquid chromatography
US6555985B1 (en) * 1998-11-12 2003-04-29 Matsushita Electric Industrial Co., Ltd. Stepping motor control device
US6742441B1 (en) * 2002-12-05 2004-06-01 Halliburton Energy Services, Inc. Continuously variable displacement pump with predefined unswept volume

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19849785C1 (de) * 1998-10-28 2000-03-16 Ott Kg Lewa Verfahren und Vorrichtung zur Förderstromeinstellung bei oszillierenden Verdrängerpumpen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326837A (en) * 1978-12-15 1982-04-27 Gilson Medical Electronics Pumping apparatus using a stepping motor
US4566868A (en) * 1980-09-17 1986-01-28 Geotechnical Digital Systems Limited Pressure source
US4643649A (en) * 1984-07-20 1987-02-17 The Perkin-Elmer Corporation Digital control for rapid refill of a liquid chromatograph pump
US4925371A (en) * 1987-12-17 1990-05-15 Dosapro Milton Roy Flow rate control for a variable stroke pump
US4930991A (en) * 1988-02-10 1990-06-05 Gilson Medical Electronics (France) Piston pump for high performance liquid chromatography
US6555985B1 (en) * 1998-11-12 2003-04-29 Matsushita Electric Industrial Co., Ltd. Stepping motor control device
US6742441B1 (en) * 2002-12-05 2004-06-01 Halliburton Energy Services, Inc. Continuously variable displacement pump with predefined unswept volume

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8172546B2 (en) 1998-11-23 2012-05-08 Entegris, Inc. System and method for correcting for pressure variations using a motor
US8814536B2 (en) 2004-11-23 2014-08-26 Entegris, Inc. System and method for a variable home position dispense system
US9617988B2 (en) 2004-11-23 2017-04-11 Entegris, Inc. System and method for variable dispense position
US8292598B2 (en) 2004-11-23 2012-10-23 Entegris, Inc. System and method for a variable home position dispense system
EP1954946B1 (de) * 2005-11-21 2014-11-05 Entegris, Inc. System und verfahren zur positionssteuerung eines mechanischen kolbens in einer pumpe
US8753097B2 (en) 2005-11-21 2014-06-17 Entegris, Inc. Method and system for high viscosity pump
US8087429B2 (en) 2005-11-21 2012-01-03 Entegris, Inc. System and method for a pump with reduced form factor
EP1954946A2 (de) * 2005-11-21 2008-08-13 Entegris, Inc. System und verfahren zur positionssteuerung eines mechanischen kolbens in einer pumpe
US9399989B2 (en) 2005-11-21 2016-07-26 Entegris, Inc. System and method for a pump with onboard electronics
TWI493107B (zh) * 2005-11-21 2015-07-21 Entegris Inc 用於在一幫浦中一機械活塞之位置控制之系統及方法
US8651823B2 (en) 2005-11-21 2014-02-18 Entegris, Inc. System and method for a pump with reduced form factor
US8870548B2 (en) 2005-12-02 2014-10-28 Entegris, Inc. System and method for pressure compensation in a pump
US8678775B2 (en) 2005-12-02 2014-03-25 Entegris, Inc. System and method for position control of a mechanical piston in a pump
US8083498B2 (en) 2005-12-02 2011-12-27 Entegris, Inc. System and method for position control of a mechanical piston in a pump
US9816502B2 (en) 2005-12-02 2017-11-14 Entegris, Inc. System and method for pressure compensation in a pump
US8662859B2 (en) 2005-12-02 2014-03-04 Entegris, Inc. System and method for monitoring operation of a pump
US8382444B2 (en) 2005-12-02 2013-02-26 Entegris, Inc. System and method for monitoring operation of a pump
US9309872B2 (en) 2005-12-02 2016-04-12 Entegris, Inc. System and method for position control of a mechanical piston in a pump
US8029247B2 (en) 2005-12-02 2011-10-04 Entegris, Inc. System and method for pressure compensation in a pump
US9631611B2 (en) 2006-11-30 2017-04-25 Entegris, Inc. System and method for operation of a pump
CN102933843A (zh) * 2010-02-18 2013-02-13 奥斯莉卡力量有限公司 利用旋转运动向线性运动的转换的发电机
US20100308670A1 (en) * 2010-02-18 2010-12-09 Oscilla Power Inc. Electrical generator that utilizes rotational to linear motion conversion
US8097990B2 (en) * 2010-02-18 2012-01-17 Oscilla Power Inc. Electrical generator that utilizes rotational to linear motion conversion
US20200094803A1 (en) * 2018-09-26 2020-03-26 Acer Incorporated Brake system
US10787158B2 (en) * 2018-09-26 2020-09-29 Acer Incorporated Brake system
US20230296089A1 (en) * 2018-12-29 2023-09-21 Biosense Webster (Israel) Ltd. Disposable Dual-Action Reciprocating Pump Assembly
US11698059B2 (en) * 2018-12-29 2023-07-11 Biosense Webster (Israel) Ltd. Disposable dual-action reciprocating pump assembly
CN110285052A (zh) * 2019-08-07 2019-09-27 东莞吉研达自动化设备科技有限公司 一种智能变量泵

Also Published As

Publication number Publication date
EP1602826B1 (de) 2007-06-27
EP1602826A1 (de) 2005-12-07
ATE365868T1 (de) 2007-07-15
DE602004007247D1 (de) 2007-08-09
DE602004007247T2 (de) 2008-02-28

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Date Code Title Description
AS Assignment

Owner name: SOCIETE INDUSTRIELLE DE SONCEBOZ S.A., SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PFISTER, JEAN-FRANCOIS;NIKLAUS, JOEL;DEXET, CHRISTOPHE;AND OTHERS;REEL/FRAME:016785/0004

Effective date: 20050527

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION