CN102305203B - Linear motor-driven plunger pump - Google Patents

Linear motor-driven plunger pump Download PDF

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Publication number
CN102305203B
CN102305203B CN201110233902.6A CN201110233902A CN102305203B CN 102305203 B CN102305203 B CN 102305203B CN 201110233902 A CN201110233902 A CN 201110233902A CN 102305203 B CN102305203 B CN 102305203B
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China
Prior art keywords
cylinder
flow
plunger
hole
plunger pump
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CN201110233902.6A
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Chinese (zh)
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CN102305203A (en
Inventor
聂松林
董武涛
李志海
尹方龙
喻国哲
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北京工业大学
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Publication of CN102305203B publication Critical patent/CN102305203B/en

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Abstract

The invention relates to a linear motor-driven plunger pump. The mechanical part of the plunger pump comprises a cylinder body I, a cylinder body II, flow distribution valves, an in-sucking communication pipe, out-pressing communication pipes, compacting flanges, plunger rods, linear motor stators, linear motor rotors and guide rails; and the electric part mainly consists of linear motors, a controller, drivers and a position feedback device. The linear motor-driven plunger pump is characterized in that a group of coil-type stators drive a permanent magnet rotor in a combinational way, thus realizing high thrust output of the linear motors. Each flat-type linear motor drives two plungers at the two ends of one plunger rod, and while the double-action plunger rod reciprocates, one end of the double-action plunger rod sucks water and at the same time the other end of the double-action plunger rod presses water. The two cylinders realizes the effective communication between the water sucking loop and water pressing loop of the plunger pump by means of the in-sucking communication pipe and the two out-pressing communication pipes. Each plunger hole is communicated with a flow distribution valve consisting of an in-sucking valve and an out-pressing valve. The electric part controls the out-of-phase movement of the linear motors, thus ensuring the stable combinational flow output of the pump. The linear motor-driven plunger pump disclosed by the invention has the advantages of less mechanical transmission links and high system efficiency and reliability.

Description

Linear motor-driven plunger pump
Technical field
The present invention relates to a kind of Linear motor-driven plunger pump, belong to pump class, be applicable to sea water and fresh water, mineral wet goods workmanship does in the hydraulic system of medium, in the industries such as deep-sea exploration, petroleum production, food processing, boats and ships naval vessels, have wide practical use.
Technical background
Traditional hydraulic transmission is usingd mineral oil as working medium, but that mineral oil exists is inflammable, leakage and exhaust emission environment, long-term use easily oxidation and rotten, anti-shear ability is poor, viscosity is affected greatly by oil temperature, recycling rate is low, refuse is processed the drawbacks such as difficulty, petering out along with following petroleum resources particularly, mineral oil will become scarce resource, cost can sharply increase, and the development of hydraulic transmission technology will face a severe test.
Water hydraulic drive technology is an environment-friendly and green technology with sustainable development potentiality.The compatibility of 1 environment friendly and product; 2 non-flame propertys and Security; 3 economize on resources with low cost, in addition, near ocean, rivers, lake, open water hydraulic system needn't arrange independent water tank and cooling system, simplied system structure, saving manufacture cost, have very outstanding superiority for ocean environment such as the more nervous submarine of usage space, boats and ships, drilling platforms greatly.
Oil hydraulic pump is the dynamical element of hydraulic system, is the core of whole hydraulic system, and its effect is the mechanical energy of prime mover to be converted to the pressure energy of liquid, to whole hydraulic system, provides power.Domestic have the mesohigh sea water and fresh water plunger pump of certain Research foundation to comprise cam-type axial piston pump, angle type axial piston pump.Axial piston pump has three pairs of crucial friction pair difficult problems to be solved, comprises plunger-cylinder body, cylinder body-thrust plate, swash plate-piston shoes.Just because of failing, resolve this three large friction pair difficult problem, existing water pressure plunger pump volumetric efficiency and reliability are on the low side.
Tradition Variable plunger pump is by regulating swashplate angle or motor speed to realize variable.The servo-control system that linear motor plunger pump consists of linear electric motor, driver, controller, position feedback device etc. regulates motor jig frequency, is easy to realize the output of plunger pump variable-flow.Secondly, axial piston pump and conventional reciprocating pump all adopt common electric rotating machine, by intermediate conversion mechanism, rotatablely moving of motor are converted to straight line motion, then drive plunger to-and-fro motion.Axial piston pump and conventional reciprocating pump structure have determined that its pressure, flow pulsation are large, and vibration noise is serious.Linear motor plunger pump adopts linear motor rotor to be directly connected with plunger, under certain plunger motion planning, can realize in theory multi-cylinder combined flow constant, the vibration noise that slows down pressure, flow pulsation and bring thus.Linear motor-driven plunger pump easily is automated control, tool intelligent fault-tolerance function, even one or two electrical faults by switching straight line motor movement, plan, still can realize plunger pump combined flow stable.
Conventional flat linear electric motor are comprised of a permanent magnet stator, a coil mover, a guide rail and several slide blocks etc., and slide block is connected with mover, and stator drives mover to-and-fro motion on fixed guide.The inertial force that coil mover and slide block etc. consume is larger, and the linear electric motor normal thrust of demand is larger.Linear motor-driven plunger pump, adopts novel flat linear electric motor.
This plunger pump not only meets the new developing direction of hydraulic transmission, and efficiently solves more than the crucial friction pair of existing water pressure plunger pump and a masty difficult problem.On the other hand, this plunger pump both can adopt sea water and fresh water to make working medium, also should adopt mineral oil as driving medium.Linear motor-driven plunger pump easily is automated control, though one or two electrical faults by control system switching straight line motor, plan, still can guarantee that plunger pump output flow is stable, reliability is high, is applicable to frequency control of motor speed pump control system.Can predict, this patent will have broad application prospects in Fluid-transmission and Mechatronic Systems.
Summary of the invention
Tradition plunger pump all passes through intermediate conversion mechanism, rotatablely moving of electric rotating machine is converted to the linear reciprocating motion of plunger, and efficiency is low, structure is numerous and jumbled, and the stroking mechanism of plunger pump is complicated, is difficult for realizing automation and controls.On the other hand, traditional plunger pump structure has determined that plunger pump inevitably exists flow, pressure pulsation, causes system vibration noise large.The 3rd, domestic pure water plunger pump technology, is limited by a multipair crucial friction pair difficult problem and fails to be well solved, and urgently breaks through.For, solve these technical barriers, explore the new of plunger pump, the present invention proposes a kind of Linear motor-driven plunger pump, belong to pump class, adopt sea water and fresh water, mineral wet goods as working medium.
The present invention adopts following technological scheme:
A Linear motor-driven plunger pump, is comprised of mechanical part and electric part.Mechanical part mainly comprises cylinder body I 1, suck connecting tube 2, two extrude connecting tube 3, four plunger bushings 5, four plunger rods 6, four guide rails 7, four groups of slide blocks 8, four movers 9, four groups of stators 11, four supported flanges 13, cylinder body I I15 and eight cover flow-distributing valves 12.Electric part comprises a controller, four drivers, four flat linear electric motor, position feedback device etc., and electric part forms again servo drive control system.Cylinder body I 1 and cylinder body I I15 are distributed in the two ends of Linear motor-driven plunger pump, the suction through hole 17 of cylinder body I 1 communicates through sucking in two cylinder body inner sides with the suction blind hole 23 of cylinder body I I15 connecting tube 2, and the extrusion blind hole 18 of two cylinder bodies extrudes and is connected connecting tube 3 by two.Four linear electric motor are arranged symmetrically with between two, and every linear motor rotor 9 is connected with a plunger rod 6 by supported flange 13, and the embedded plunger bushing in cylinder hole 16 forms plunger hole, the plunger at plunger rod 6 two ends and plunger hole Spielpassung.Eight cover flow-distributing valves 12 embed respectively in corresponding flow-distributing valve mounting hole 22, and flow-distributing valve 12 exterior edge faces are sealed by gland 14, and every group of plunger-cylinder hole is secondary corresponding with a set of flow-distributing valve 12.Its electric part comprises that every linear electric motor are by a corresponding driver drives, controller is exported the control signal of certain phase difference to four drivers, after four drivers amplify control signal, output to respectively more corresponding linear motor stator electric 11, thereby drive the mover 9 of corresponding linear electric motor, mover 9 drives plunger rod 6 with certain motion planning linear reciprocating motion by supported flange 13.
Described Linear motor-driven plunger pump also can contain 2n or 3n platform linear electric motor, n >=1, and every linear electric motor are connected with a double-action plunger bar, between linear electric motor, with certain phase difference drive plunger rod to-and-fro motion in cylinder hole, realize pump function.
If Linear motor-driven plunger pump contains 2n platform linear electric motor, 2n platform linear electric motor drive 2n double-action plunger bar with pyramidal wave, and the 90 ° of phase place operations of staggering respectively, make the velocity composition curve of a plurality of plungers constant, guarantee that pump combined flow keeps stable.If Linear motor-driven plunger pump contains 3n platform linear electric motor, 3n platform linear electric motor drive 3n plunger rod with certain motion planning operation.When n is odd number, between linear electric motor with trapezoidal wave, 120 ° of phase places operation of staggering respectively; When n is even number, between linear electric motor with pyramidal wave, respectively stagger the operation of 90 ° of phase places or with trapezoidal wave, the 120 ° of phase places operations of staggering respectively, guarantee that plunger pump output combined flow reaches constant.
Every flat linear electric motor comprise one group of coil type stator 11, one group of permanent magnet type mover 9, guide rail 7 and two slide blocks 8; Stator 11 and slide block 8 are all installed fixing, and guide rail 7 is connected with mover 9, and 8 pairs of guide rails of slide block, 7 movers 9 play guiding and positioning action, make mover 9 and stator 11 keep certain air gap;
Cylinder body I 1 is asymmetric with cylinder body I I15, cylinder body I 1 axial outer end has plunger pump suction port 19, on the relative face of two cylinder bodies, two row are arranged and are had 4 cylinder holes 16 in two separate ranks, the bi-side of cylinder body I 1 have four flow-distributing valve mounting holes 22, between flow-distributing valve mounting hole 22, have suction passage I20, each cylinder hole 16 flow-distributing valve mounting hole 22 that communicates with a flow-distributing valve mounting hole 22 is communicated with suction passage I20 and crescent I21, suction passage I20 is all communicated with flow-distributing valve suction port 28 and the suction through hole 17 that is positioned at cylinder body I 1 center portion, two of cylinder body I 1 extrude blind hole 18 and are positioned at the both sides up and down that suck through hole 17, extruding blind hole 18 is that flow-distributing valve extrusion mouth 33 is connected with flow-distributing valve mounting hole 22 middle parts, cylinder body I I15 axial outer end has plunger pump and extrudes mouth 27, axially inner side becomes two row two row evenly to open four cylinder holes 16, each cylinder hole 16 communicates with corresponding flow-distributing valve mounting hole 22, between flow-distributing valve mounting hole 22, have suction passage 1125, suction passage 1125 is communicated with flow-distributing valve mounting hole 22 by crescent 1124, the suction passage 1125 of cylinder body I I15 sucks blind hole 23 with flow-distributing valve suction port 28 with the center portion that is positioned at cylinder body I I15 and is all communicated with, two of cylinder body I I15 extrude blind hole 18 and are positioned at the both sides up and down that suck blind hole 23, and be that flow-distributing valve extrusion mouth 33 is connected with flow-distributing valve mounting hole 22 middle parts, the extrusion blind hole 18 of cylinder body I I15 realizes extrusion blind hole 18 by the extrusion duct 26 of vertical direction and communicates with plunger pump extrusion mouth 27, cylinder body I 1, cylinder body I I15 suck connecting tube 2 to be connected connecting tube 3 to realize the suction loop of two cylinder bodies and extrude loop with two extrusion by one and are connected.
The flow-distributing valve 12 being comprised of suction valve 30 and delivery valve 29 adopts integral structure (patent applied for, number of patent application 201110048541.8), flow-distributing valve exterior edge face is sealed by gland 14, suction valve radially duct 32 communicates with suction through hole 17 by suction passage I20, or communicate with suction blind hole 23 by suction passage II25, flow-distributing valve radially duct 31Yu Gang hole 16 is communicated with, flow-distributing valve extrude mouthfuls 33 on flow-distributing valve mounting hole 22 between two opposed and with extrude blind hole 18 and be communicated with.
Adopt trunk piston set automatic compensator for clearance (patent applied for, number of patent application 200910243654.6) to carry out plunger cavity sealing or directly adopt combined seal ring sealing.
Above-mentioned controller is controlled many described linear electric motor, make plunger I4 and the plunger II10 at double-action plunger bar 6 two ends do periodically to-and-fro motion, four linear electric motor drive eight plungers or two linear electric motor four plungers with pyramidal wave, differ the motion planning operation of 90 ° of phase places, three linear electric motor six plunger pumps can be realized the combined flow of plunger pump stable output with trapezoidal wave, the motion planning operation that differs 120 ° of phase places.
By adjusting linear motor rotor 9 motion plannings, pilot plunger I4 and plunger II10 movement velocity, realize the Flow-rate adjustment of plunger pump; Or adopt switch operating linear electric motor number and linear motor rotor 9 motion plannings to realize Flow-rate adjustment.
Above-mentioned Linear motor-driven plunger pump, when position feedback device detects several linear electric motor and breaks down, the motion planning of control system automatic switchover linear motor rotor 9 has constant combined flow output to guarantee plunger pump, reduces flow pulsation; Described motion planning comprise 2n double-action plunger bar with pyramidal wave, differ 90 ° of phase motion, 3n double-action plunger bar take trapezoidal wave, to differ 120 ° of phase motion n be odd number, 3n double-action plunger bar with trapezoidal wave, differ 120 ° of phase motion or take pyramidal wave, differ 90 ° of phase motion n as even number.
Above-mentioned a kind of Linear motor-driven plunger pump also can adopt plunger pump two cylinder bodies symmetrical, all adopt the structure of cylinder body I 1, two of two cylinder bodies suck through hole 17 inner sides and communicate connecting tube 2 through sucking, two suck through hole 17 outer ends is connected with suction main, the extrusion through hole inner side of two cylinder bodies is connected by extruding connecting tube 3, extrude through hole outer end and be connected with extrusion house steward, realize two cylinder bodies and suck loops and extrude circuit communication.Above-mentioned Linear motor-driven plunger pump, described linear electric motor adopt conventional construction, and flat linear motor rotor is connected with a plurality of slide blocks, and guide rail is fixed, and stator drives mover to-and-fro motion on guide rail.
The working medium of above-mentioned Linear motor-driven plunger pump comprises mineral oil, sea water and fresh water and other low-viscosity flowing mediums.
The present invention can obtain following beneficial effect:
This plunger pump adopts moving-iron type linear motor, effectively overcomes high-pressure liquid resistance, and has reduced the inertial force that conventional coil type mover consumes, and has reduced linear electric motor normal thrust demand.Also can adopt conventional construction: flat linear motor rotor is connected with a plurality of slide blocks, and guide rail is fixed, stator drives mover to-and-fro motion on guide rail.
This plunger pump adopts linear electric motor to adopt double-action plunger bar, and the output flow of plunger pump, at hydraulic fluid, has effectively been improved in cavity another chamber in imbibition that an end plug and cylinder hole form.
This plunger pump cylinder body is simple in structure, the mode only connecting by two cylinder interior open-blind holes, auxiliary hole and connecting tube, two cylinder bodies realizing plunger pump extrude mouthful 27 fluids from plunger pump suction port 19 feed liquors, a plunger pump, just can effectively give many cover piston valvings.
Linear motor-driven plunger pump, adopts valve flow form, and resistance tocrocking strengthens greatly, has effectively reduced crucial friction pair quantity, only exist plunger-cylinder body secondary this to important friction pair, brought new approaches and new way to the development of water pressure plunger pump.
Single chamber flow of linear motor plunger pump and movement velocity and the sectional area of plunger are linear.Linear electric motor drive 3n plunger rod, take trapezoidal wave, respectively stagger 120 ° of phase places (n is odd number) or take pyramidal wave, stagger 90 ° of phase places (n is even number) when operation respectively, the velocity composition curve of a plurality of plungers is constant, thereby plunger pump output combined flow can reach constant in theory; When linear electric motor drive 2n plunger rod with pyramidal wave, and the 90 ° of phase differences that stagger are respectively when move, and it is stable that pump combined flow also can keep in theory.Secondly, this Linear motor-driven plunger pump possesses intelligent fault-tolerance function.Take four Linear motor-driven plunger pumps as example, when four linear electric motor are with pyramidal wave, while differing the work of 90 ° of phase places, if position feedback device detects linear electric motor and breaks down, control system automatic switchover linear electric motor motion planning, make each linear electric motor with trapezoidal wave, differ the operation of 120 ° of phase places; When two linear electric motor being detected and break down, then switch each linear electric motor motion planning to pyramidal wave, differ 90 ° of phase place work, guarantee that the velocity composition curve level of a plurality of plungers is constant, guarantee the combined flow of plunger pump stable output.Conventional axial plunger pump, plunger number is odd number, all has in theory flow pulsation, and actual flow pulsation is larger.This Linear motor-driven plunger pump combines by multi-cylinder, and flow pulsation is zero in theory, and reliability is high, even if break down, also can guarantee that pump has stable combined flow output, reduces flow pulsation.
This plunger pump is easy to realize variable and automation and controls, and by servo-control system, adjusts linear motor rotor motion planning, and pilot plunger movement velocity realizes the Flow-rate adjustment of plunger pump; Or adopt switch operating linear electric motor number and linear motor rotor motion planning to realize Flow-rate adjustment, be applicable to frequency control of motor speed pump control system.
By material, select to finely tune with structure, this plunger pump both can be made working medium by mineral oil again, and also available sea water and fresh water and other low viscosity fluid media are made working medium, and application area is wider.
Accompanying drawing explanation
Accompanying drawing 1 is Linear motor-driven plunger pump plan view of the present invention.
Accompanying drawing 2 is Linear motor-driven plunger pump plan view of the present invention.
Accompanying drawing 3 is Linear motor-driven plunger pump right side view of the present invention.
Accompanying drawing 4 is the main apparent direction Section View of Linear motor-driven plunger pump of the present invention.
Accompanying drawing 5 is Linear motor-driven plunger pump left side view of the present invention.
Accompanying drawing 6 is the plan view of accompanying drawing 4.
Accompanying drawing 7 Linear motor-driven plunger pump cylinder body I of the present invention right side view.
Accompanying drawing 8 Linear motor-driven plunger pump cylinder body I of the present invention plan view.
Accompanying drawing 9 Linear motor-driven plunger pump cylinder body I of the present invention I plan view.
Accompanying drawing 10 Linear motor-driven plunger pump cylinder body I of the present invention I left side view.
The flow-distributing valve assembly right side view of accompanying drawing 11 Linear motor-driven plunger pumps of the present invention.
The flow-distributing valve assembly plan view of accompanying drawing 12 Linear motor-driven plunger pumps of the present invention.
The flow-distributing valve assembly left side view of accompanying drawing 13 Linear motor-driven plunger pumps of the present invention
Accompanying drawing 14 is that Linear motor-driven plunger pump mechanical part and electric part are related to sketch.
In figure: 1, cylinder body I, 2, suck connecting tube, 3, extrude connecting tube, 4, plunger I, 5, plunger bushing, 6, plunger rod, 7, guide rail, 8, slide block, 9, mover, 10, plunger II, 11, stator, 12, flow-distributing valve, 13, supported flange, 14, gland, 15, cylinder body I I, 16, cylinder hole, 17, suck through hole, 18, extrude blind hole, 19, plunger pump suction port, 20, suction passage I, 21, crescent I, 22, flow-distributing valve mounting hole, 23, suck blind hole, 24, crescent II, 25, suction passage II, 26, extrude duct, 27, plunger pump extrudes mouth, 28, flow-distributing valve suction port, 29, delivery valve, 30, suction valve, 31, flow-distributing valve is duct radially, 32, suction valve is duct radially, 33, flow-distributing valve extrudes mouth.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention is further described.
Embodiment 1
Linear motor-driven plunger pump comprises mechanical part and electric part, and mechanical part and electric part are connected by linear motor rotor.The plunger pump that contains four linear electric motor of take is example, every linear electric motor of Linear motor-driven plunger pump are respectively by a corresponding driver drives, controller is exported the control signal of certain phase difference to four drivers, after four drivers amplify control signal, output to respectively more corresponding linear motor stator electric 11, thereby drive the mover 9 of corresponding linear electric motor, mover 9 drives plunger rod 6 with certain motion planning linear reciprocating motion by supported flange 13.
11 combinations of one group of coil type stator drive permanent magnet type movers 9 to-and-fro motion on fixing slide block 8, permanent magnet mover 9 drives 6 to-and-fro motion of double-action plunger bar by supported flange 13, and the plunger I4 at double-action plunger bar 6 two ends and plunger II10 are respectively in imbibition stroke and hydraulic fluid stroke.Suppose that linear motor rotor 9 is from limit on the left position setting in motion, plunger I4 enters imbibition stroke from the left dead point of plunger cavity of cylinder body I 1.In plunger cavity, form negative pressure, barometric pressure makes fluid through plunger pump suction port 19, suction passage I20, overcomes suction valve 30 spring forces and enters flow-distributing valve 12 intermediate cavity, then flow in plunger cavity.Meanwhile, plunger II10 enters hydraulic fluid stroke from the left dead point of plunger cavity of cylinder body I I15, after plunger cavity inner fluid is compressed, overcome delivery valve 29 spring forces and the fluid back pressure that extrudes blind hole 18 places, flow through and extrude blind hole 18, extrude duct 26 to plunger pump extrusion mouth 27.When linear motor rotor 9 arrives limit on the right-right-hand limit position, liquid is full of the plunger cavity of cylinder body I 1, and suction valve 30 valve plates are because of spring-loaded, and trend is closed; Meanwhile, the plunger cavity inner fluid of cylinder body I I15 is all discharged from, delivery valve 29 valve plate spring-loadeds, and trend is closed.
When position feedback device detects linear motor rotor 9 arrival limit on the right-right-hand limit position, servo-control system is controlled and is driven mover 9 reversing motions by controller, driver, coil type stator 11.Plunger I4 enters hydraulic fluid stroke from the right dead point of plunger cavity of cylinder body I 1, compressed fluid overcomes delivery valve 29 spring forces and extrudes the fluid back pressure at blind hole 18 places, the extrusion blind hole 18 of the extrusion blind hole 18 of the cylinder body I of flowing through 1, extrusion connecting tube 3 and cylinder body I I15, then extrude mouthful 27 outflows through extruding duct 26 to plunger pump.Meanwhile, plunger II10 enters imbibition stroke from the right dead point of plunger cavity of cylinder body I I15.In plunger cavity, form negative pressure, barometric pressure makes fluid through plunger pump suction port 19, suction through hole 17, suction connecting tube 2, suction blind hole 23 and suction passage 1125, overcomes suction valve 30 spring forces and enters flow-distributing valve 12 intermediate cavity, then flow in plunger cavity.When linear motor rotor 9 arrives limit on the left position, liquid is full of the plunger cavity of cylinder body I I15, and suction valve 30 valve plates are because of spring-loaded, and trend is closed; Meanwhile, the plunger cavity inner fluid of cylinder body I 1 is all discharged from, delivery valve 29 valve plate spring-loadeds, and trend is closed.So far, a linear motor rotor 9 is in one-period, and once, the plunger I4 at double-action plunger bar 6 two ends and the equal imbibition of plunger II10, discharge opeing are once in to-and-fro motion.
In like manner, other several linear motor rotors 9 also drive plunger rod 6 to-and-fro motion, and each linear motor rotor 9 under pyramidal wave or trapezoidal wave motion planning with the motion of certain phase difference, realize plunger pump imbibition and discharge opeing.Single chamber flow of linear motor plunger pump and movement velocity and the sectional area of plunger are linear.Linear electric motor drive 3n plunger rod with certain motion planning operation, when n is odd number, between linear electric motor with trapezoidal wave, the 120 ° of phase places that stagger are moved respectively; When n is even number, between linear electric motor with pyramidal wave, respectively stagger the operation of 90 ° of phase places or with trapezoidal wave, the 120 ° of phase places operations of staggering respectively, guarantee that plunger pump output combined flow reaches constant.Many linear electric motor drive 2n plunger rod with pyramidal wave, and the 90 ° of phase differences that stagger are respectively when move, and it is stable that pump combined flow also can keep in theory.Suppose four linear electric motor with pyramidal wave, differ 90 ° of phase place work.When position feedback device detects linear electric motor and breaks down, control system automatic switchover linear electric motor motion planning, make each linear electric motor with trapezoidal wave, differ 120 ° of phase place work; When two linear electric motor being detected and break down, control system automatic switchover linear electric motor motion planning, make each linear electric motor with trapezoidal wave, differ 90 ° of phase place work, guarantee the combined flow of plunger pump stable output.
By adjusting linear motor rotor 9 motion plannings, can pilot plunger movement velocity, realize the Flow-rate adjustment of plunger pump; Or adopt switch operating linear electric motor number and linear motor rotor 9 motion plannings to realize Flow-rate adjustment.
Embodiment 2
Two cylinder bodies of plunger pump are symmetrical, all adopt the structure of cylinder body I, two of two cylinder bodies suck through hole inner side and communicate connecting tube through sucking, two suck through hole outer end is connected with suction main, the extrusion through hole inner side of two cylinder bodies is connected by extruding connecting tube, extrude through hole outer end and be connected with extrusion house steward, realize two cylinder bodies and suck loops and extrude circuit communication.The beneficial effect of this housing structure is the on-the-spot applied environment that adapts to plunger pump, can be from one end imbibition of plunger pump and the other end hydraulic fluid or from the imbibition of same one end and the hydraulic fluid of plunger pump.
By material, select to finely tune with structure, this plunger pump both can be made working medium by mineral oil again, and also available sea water and fresh water and other low viscosity fluid media are made working medium.

Claims (3)

1. a Linear motor-driven plunger pump, is characterized in that: mechanical part and electric part, consist of; Mechanical part mainly comprises cylinder body I (1), suction connecting tube (2), two extrusion connecting tube (3), four plunger bushings (5), four double-action plunger bars (6), four supported flanges (13), cylinder body II (15) and eight cover flow-distributing valves (12); Electric part comprises a controller, four drivers, four flat linear electric motor, position feedback device, and electric part forms servo drive control system; Cylinder body I (1) and cylinder body II (15) are distributed in the two ends of Linear motor-driven plunger pump, the suction through hole (17) of cylinder body I (1) communicates through sucking connecting tube (2) in two cylinder body inner sides with the suction blind hole (23) of cylinder body II (15), and the extrusion blind hole (18) of two cylinder bodies extrudes and is connected connecting tube (3) by two; Four linear electric motor are arranged symmetrically with between two, every linear motor rotor (9) is connected with a double-action plunger bar (6) by supported flange (13), the embedded plunger bushing in cylinder hole (16) forms plunger hole, plunger and the plunger hole Spielpassung at double-action plunger bar (6) two ends; Eight cover flow-distributing valves (12) embed respectively in corresponding flow-distributing valve mounting hole (22), and flow-distributing valve (12) exterior edge face is by gland (14) sealing, and every group of plunger-cylinder hole is secondary corresponding with a set of flow-distributing valve (12);
Every flat linear electric motor comprise one group of coil type stator (11), one group of permanent magnet type mover (9), a guide rail (7) and two slide blocks (8); Stator (11) and slide block (8) are all installed fixing, guide rail (7) is connected with mover (9), slide block (8) plays guiding and positioning action to guide rail (7), mover (9), makes mover (9) and stator (11) keep certain air gap;
Every flat linear electric motor are by a corresponding driver drives, controller is exported the control signal of certain phase difference to four drivers, after four drivers amplify control signal, output to respectively more corresponding linear motor stator electric (11), thereby drive the mover (9) of corresponding linear electric motor, mover (9) drives double-action plunger bar (6) with certain motion planning linear reciprocating motion by supported flange (13);
Cylinder body I (1) is asymmetric with cylinder body II (15), cylinder body I (1) axial outer end has plunger pump suction port (19), on the relative face of two cylinder bodies, two row are arranged and are had 4 the first cylinder holes in two separate ranks, the bi-side of cylinder body I (1) are symmetrical, respectively have two flow-distributing valve mounting holes, between the flow-distributing valve mounting hole of cylinder body I, have suction passage I (20), each first cylinder hole (16) communicates with the flow-distributing valve mounting hole of a cylinder body I, the flow-distributing valve mounting hole of cylinder body I is communicated with suction passage I (20) and crescent I (21), suction passage I (20) is all communicated with the suction through hole (17) that is positioned at cylinder body I (1) center portion with the flow-distributing valve suction port of cylinder body I, two of cylinder body I (1) extrude blind hole and are positioned at the both sides up and down that suck through hole (17), extruding blind hole (18) is that flow-distributing valve extrusion mouthful is connected with the flow-distributing valve mounting hole middle part of cylinder body I,
Cylinder body II (15) axial outer end has plunger pump and extrudes mouthful (27), axially inner side becomes two row two row evenly to open four the second cylinder holes, the bi-side of this cylinder body II (15) are symmetrical, respectively have the flow-distributing valve mounting hole of two cylinder body II, each second cylinder hole (16) communicates with the flow-distributing valve mounting hole of corresponding cylinder body II, between the flow-distributing valve mounting hole of cylinder body II, have suction passage II (25), suction passage II (25) is communicated with the flow-distributing valve mounting hole of cylinder body II by crescent II (24), the suction passage II (25) of cylinder body II (15) sucks blind hole (23) with the flow-distributing valve suction port of cylinder body II with the center portion that is positioned at cylinder body II (15) and is all communicated with, two of cylinder body II (15) extrude the both sides up and down that blind hole is positioned at the suction blind hole of cylinder body II, and be that flow-distributing valve extrusion mouthful is connected with the flow-distributing valve mounting hole middle part of cylinder body II, the extrusion blind hole of cylinder body II (15) realizes extrusion blind hole by the extrusion duct (26) of vertical direction and communicates with plunger pump extrusion mouthful (27).
2. a kind of Linear motor-driven plunger pump according to claim 1, is characterized in that: adopt switch operating linear electric motor number and linear motor rotor (9) motion planning to realize Flow-rate adjustment.
3. a kind of Linear motor-driven plunger pump according to claim 1 and 2, is characterized in that: the working medium of described plunger pump comprises mineral oil, sea water and fresh water and other low-viscosity flowing mediums.
CN201110233902.6A 2011-08-16 2011-08-16 Linear motor-driven plunger pump CN102305203B (en)

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Application Number Priority Date Filing Date Title
CN201110233902.6A CN102305203B (en) 2011-08-16 2011-08-16 Linear motor-driven plunger pump

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CN102305203A CN102305203A (en) 2012-01-04
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CN103208903A (en) * 2013-03-06 2013-07-17 北京工业大学 Linear motor for pump
CN103343737A (en) * 2013-07-17 2013-10-09 四川金星压缩机制造有限公司 Linear motor reciprocating piston type compressor
CN103557135B (en) * 2013-10-15 2015-10-28 华中科技大学 Double-working-condition self adaption straight line Electric-motor driven pumps and realize the method for constant current output
CN103670999B (en) * 2013-12-31 2016-04-20 大连海事大学 A kind of piston valving double-action linear electric motor drive reciprocating pump
CN104500507B (en) * 2014-12-17 2016-08-17 北京航空航天大学 Invert the servopump of spool valve pocket Flat valve
CN106286197B (en) * 2016-11-09 2019-04-30 北京工业大学 One kind is done more physical exercises unit straight line motor drive type plunger pump
CN107070351A (en) * 2016-12-25 2017-08-18 北京工业大学 A kind of Linear motor-driven plunger pump constant flow motion planning and control method
CN107559166B (en) * 2017-10-12 2018-12-11 中国矿业大学 A kind of medical reciprocal transportation pump
WO2021035521A1 (en) * 2019-08-27 2021-03-04 烟台杰瑞石油装备技术有限公司 Linear electric motor-driven plunger pump
WO2021035522A1 (en) * 2019-08-27 2021-03-04 烟台杰瑞石油装备技术有限公司 Linear motor plunger pump

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