CN101839268B - Numerical control hydraulic power unit based on magnetic control shape memory alloy - Google Patents
Numerical control hydraulic power unit based on magnetic control shape memory alloy Download PDFInfo
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- CN101839268B CN101839268B CN2010101852443A CN201010185244A CN101839268B CN 101839268 B CN101839268 B CN 101839268B CN 2010101852443 A CN2010101852443 A CN 2010101852443A CN 201010185244 A CN201010185244 A CN 201010185244A CN 101839268 B CN101839268 B CN 101839268B
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Abstract
The invention relates to a numerical control hydraulic power unit based on magnetic control shape memory alloy, mainly comprising a numerical drive controller (10) and a hydraulic power unit body (11) electrically connected with the numerical drive controller. The numerical control hydraulic power unit is characterized in that the hydraulic power unit body (11) comprises a cylinder body (3); the cylinder body (3) is at least provided with two plunger piston holes (12); plunger pistons (6) are arranged in the plunger piston holes (12); one end of the plunger piston holes (12) is communicated with a high pressure oil outlet and a low pressure oil inlet simultaneously; one end of the plunger pistons (6) is abutted on reset springs (13), and the other end is connected with one end of magnetic control shape memory alloy sticks (2); the other end of the magnetic control shape memory alloy sticks (2) is hinged on a front end cover (9) through hinge shafts (14); the circumference of the plunger piston holes (12) is covered with magnetic field exciting devices (1); and the magnetic field exciting devices (1) are electrically connected with the numerical drive controller (10). The invention directly changes electrical energy into hydraulic energy, and has the advantages of small volume, light weight, variable numerical control, fast response, less friction pair, good sealing performance, low noise, high efficiency, high reliability, and the like.
Description
Technical field
The present invention relates to a kind of hydraulic pressure installation, the especially a kind of hydraulic power unit that can export high pressure oil, specifically a kind of numerical control hydraulic power unit based on magnetic control shape memory alloy.
Background technique
As everyone knows, hydraulic power unit is hydraulic system " heart ", is the crucial component of decision systems performance.Hydraulic power unit mainly is made up of motor (or internal-combustion engine), coupling and oil hydraulic pump at present, and motor is converted into mechanical energy with electric energy, is delivered to oil hydraulic pump through coupling again, and by oil hydraulic pump mechanical energy being converted into hydraulic pressure then can export.Therefore, there is following problem in varying degrees in the conventional hydraulic power unit: (1) volume and weight is bigger; (2) the stroking mechanism low-response, be difficult to realize the numerical control variable; (3) motive sealing effect is relatively poor; (4) noise is big; (5) composition is complicated, efficient is low, reliability is low.
CN1168715A discloses a kind of oil hydraulic pump that uses marmem.This oil hydraulic pump is realized shape memory alloy deformation through the temperature that changes marmem, thereby promotes the suction oil that piston motion realizes piston cavity.But this method is owing to driven by the temperature field, and its response frequency very low (about 1Hz) is difficult to satisfy industrial requirement.
Known magnetic control shape memory alloy (Magnetic Shape Memory Alloy; MSMA) be one type of novel alert and resourceful functional material; Not only have the conventional shape-memory alloy and receive the thermoelasticity shape memory effect of Temperature Field Control; And have the magnetic shape memory effect that receives magnetic field control (Magnet i c ShapeMemory Effect, MSME).Therefore; The overall characteristic of have big recovery strain concurrently, exporting stress, high response frequency and can accurately control greatly; Make it important application arranged, be expected to become piezoelectric constant and magnetostriction materials a new generation's driving and sensing material afterwards in fields such as high-power sonar under water, micro positioner, vibrations and noise control, linear motor, microwave device, robots.At present, the magnetic control shape memory alloy of having found mainly comprises: Ni is an alloy, Ni-Mn-Ga, Ni-Al-Mn, Ni-Co-Al etc.; Co is an alloy, Co-Mn, Co-Ni, Co-Ni-Ga etc.; Fe is an alloy, Fe-Pd, Fe-Mn-Si, Fe-Ni-Co-Ti, Fe-Pt, Fe-C, Fe-Cr-Ni-Mn-Si-Co etc.Wherein, the Ni-Mn-Ga alloy is the MSMA that finds the earliest, its research is also goed deep into the most representative the most, and realized Preliminary Applications.
The conventional shape-memory alloy, like the TiNi base, the Cu base, Fe base etc., though have bigger reversible recovery strain and big restoring force, owing to driven by the temperature field, its response frequency very low (about 1Hz).Compare with marmem, though piezoelectric constant and magnetostriction materials have very high response frequency (about 1000Hz), the maximum strain that can reach also has only 0.2%, has limited material in actual application in engineering.MSMA then has big strain and high response frequency concurrently; The maximum magneto-strain of report MSMA is 9.4% at present; The highest response frequency can reach 5000Hz; In the 150Hz high-frequency alternating magnetic field, still can obtain the large magneto-strain up to 1%, the deficiency that remedied that conventional shape-memory alloy response frequency is slow, piezoelectricity and magnetostriction materials should diminish is a kind of comparatively desirable driving material.
Summary of the invention
The objective of the invention is existing hydraulic power unit and all adopt motoring to have a series of problems such as volume is big, low-response, design that a kind of volume is little, in light weight, numerical control variable, response are fast, good seal, noise is low, efficient is high, reliability the is high numerical control hydraulic power unit based on magnetic control shape memory alloy.
Technological scheme of the present invention is:
A kind of numerical control hydraulic power unit based on magnetic control shape memory alloy; It mainly is made up of digital drive controller 10 and the hydraulic power unit body 11 that is electrically connected with it, it is characterized in that described hydraulic power unit body 11 comprises cylinder body 3 and rear end cover that links to each other with cylinder body 38 and front cover 9, and cylinder body 3 is provided with two plunger holes 12 at least; Plunger 6 is installed in the plunger hole 12; Seal ring 7 is sleeved on the plunger 6, and an end of plunger hole 12 communicates with high pressure oil outlet and low pressure filler opening simultaneously, and in line check valve 4 is installed on the described low pressure filler opening; Oil extraction one-way valve 5 is installed on the described high pressure oil outlet; One end of plunger 6 offsets with the Returnning spring 13 that is installed in the plunger hole 12, and the other end of plunger 6 links to each other with an end of magnetic control shape memory alloy rod 2, and the other end of magnetic control shape memory alloy rod 2 links to each other with hinge 14; Hinge 14 hinges are contained on the front cover 9; 9 all link to each other with cylinder body 3 with rear end cover 8 behind the front end, and around the plunger hole 12, be coated with magnetic field excitation device 1 in the magnetic control shape memory alloy rod 2 whole travel range, magnetic field excitation device 1 is electrically connected with digital drive controller 10.
Described cylinder body 3 is provided with a low pressure oil pocket 15 that communicates with each low pressure filler opening, and this low pressure oil pocket 15 links to each other with the output terminal of oil cylinder or oil hydraulic motor through oil pipe.
Described digital drive controller 10 comprises a control chip, power drive pipe, optical coupling isolation circuit and mu balanced circuit and the auxiliary cicuit corresponding with number of plungers; The break-make of a magnetic field coil power supply of the corresponding control of each power drive pipe; Control chip calculates hydraulic power unit flow, pressure demand according to control command and feedback signal, controls each power drive pipe and takes turns conducting according to certain frequency and make hydraulic power unit export the liquid of required flow, pressure; Direction according to control command and feedback signal control high speed selector valve is switched; Be connected through cable between high speed selector valve, sensor, magnetic field coil lead-in wire and the digital drive controller 10; Control chip, sensor, power drive pipe are by DC electrical source or the power supply of ground AC-DC power supply.
Described digital drive controller is introduced closed loop control with pressure, pressure reduction, displacement, speed, the acceleration signal of system, improves system's control accuracy.
Described hydraulic power unit body 11 and digital drive controller 10 can integrated designs, also can the split design.
Beneficial effect of the present invention:
The present invention directly with electric energy be converted into hydraulic pressure can, it is little, in light weight to have a volume, numerical control variable, response are fast, friction pair is few, good seal performance, noise are low, efficient is high, the reliability advantages of higher.
The present invention has cancelled the motor (or internal-combustion engine) of conventional hydraulic power unit, and motor (or internal-combustion engine) weight occupies the overwhelming majority of whole hydraulic power unit, and the volume weight of hydraulic power unit of the present invention reduces greatly; The oil hydraulic pump of conventional hydraulic power unit has overhanging pump shaft, and pump shaft is with the prime mover shaft high speed rotating, therefore has the external leaks approach, and hydraulic power unit of the present invention does not rotatablely move, and motive sealing place number is few, good sealing effect; The stroking mechanism of the oil hydraulic pump of conventional hydraulic power unit is complicated, the dynamic characteristic of numerical control variable is relatively poor is difficult to satisfy actual usage requirement; Hydraulic power unit of the present invention adopts the switching frequency control output flow of digital control adjusting power driving tube, and response is fast; Conventional hydraulic power unit prime mover is that rotating machinery, power train friction pair are more and generally have cooling fan, makes that whole power unit noise is very big, and hydraulic power unit of the present invention does not exist to rotatablely move and overcome the big shortcoming of noise from principle; The conventional hydraulic power unit generally needs assisting agency and devices such as coupling, movement conversion mechanism, pump bracket; Many places connect and cooperate the complexity that has reduced energy conversion efficiency and reliability, increased power unit; Hydraulic power unit of the present invention is simple in structure, and efficient is high, reliability is high.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a hydraulic power unit main body structure schematic representation of the present invention.
Fig. 3 is the electric principle schematic of digital drive controller of the present invention.
1 is that magnetic field excitation device 2 is that magnetic control shape memory alloy rod 3 is that plunger 7 for polyimide seal circle 8 for rear end cover 9 for front cover 10 for numerical control drive controller 11 be hydraulic power unit body 12 for plunger hole 13 for Returnning spring 14 for hinge 15 be low pressure oil pocket in line check valve 5 for oil extraction one-way valve 6 for cylinder body 4 among the figure.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Like Fig. 1,2, shown in 3.
A kind of numerical control hydraulic power unit based on magnetic control shape memory alloy; It mainly is made up of digital drive controller 10 and the hydraulic power unit body 11 that is electrically connected with it, and described hydraulic power unit body 11 comprises cylinder body 3, rear end cover 8 and front cover 9, and cylinder body 3 is provided with a low pressure oil pocket 15 that communicates with each low pressure filler opening; This low pressure oil pocket 15 links to each other with the output terminal of oil cylinder or oil hydraulic motor through oil pipe; At least install on each cylinder body 3 and be provided with two above plunger holes 12, described plunger 6 is installed in the plunger hole 12 on the cylinder body 3, and seal ring 7 is sleeved on the plunger 6; One end of plunger hole 12 communicates with high pressure oil outlet and low pressure filler opening simultaneously; In line check valve 4 is installed on the described low pressure filler opening, and oil extraction one-way valve 5 is installed on the described high pressure oil outlet, and an end of plunger 6 offsets with the Returnning spring 13 that is installed in the plunger hole 12; The other end of plunger 6 links to each other with an end of magnetic control shape memory alloy rod 2; The other end of magnetic control shape memory alloy rod 2 links to each other with hinge 14, and hinge 14 cuts with scissors and is contained on the front cover 9, and 9 all link to each other with cylinder body 3 with rear end cover 8 behind the front end; Around the plunger hole 12, be coated with magnetic field excitation device 1 in the magnetic control shape memory alloy rod 2 whole travel range, magnetic field excitation device 1 is electrically connected with digital drive controller 10.Hydraulic power unit body 11 and digital drive controller 10 can integrated designs, also can the split design.
Key of the present invention is:
With the distortion of magnetic control shape memory alloy rod as drive the power source that plunger moves in cylinder body; Thereby change the cavity volume volume and realize suction oil process; A plurality of plungers take turns suction oil and form a hydraulic power unit, and the break-make frequency that power driving controller based on control chip control is controlled the power supply of each magnetic control shape memory alloy magnetic field generator respectively realizes the digital control of hydraulic power unit.The magnetic control shape memory alloy rod is connected through known mode with plunger and is hinged with front cover; One-way valve is embedded in respectively in the imbibition and discharge opeing loop of each plunger in the cylinder body; Magnetic field coil embeds in the cylinder body and covers the whole stroke of magnetic control shape memory alloy rod in deformation process; An one-way valve is installed respectively on the oil suction of each plunger hole and the oil-discharging circuit; Cover plate adopts with cylinder body and is threaded, and known seal element sealing is adopted in the place that need seal everywhere, and the lead-in wire of magnetic field coil is connected with the digital drive controller through cable; The digital drive controller is made up of control chip, power drive pipe, optical coupling isolation circuit, mu balanced circuit and auxiliary cicuit.Thereby the switching frequency that control chip is regulated the power drive pipe that connects each magnetic field coil according to the instruction of accepting is controlled the motion frequency of each plunger, finally controls the output flow of hydraulic power unit.Feedback of status such as the pressure through various sensor senses actuator, pressure reduction, displacement, speed, acceleration are given controller, are easy to realize closed loop control.Power unit body and digital drive controller can integrated designs, also can the split design
As shown in Figure 1; Power unit of the present invention is made up of hydraulic power unit body 11 and digital drive controller 10; Digital drive controller 10 receives control command, calculates power drive pipe switching frequency, controls the magnetic field coil power supply of each power drive pipe according to the magnetic control shape memory alloy of the frequency of resolving out conducting hydraulic power unit successively; The liquid of the required flow pressure of control hydraulic power unit output system is realized hydraulic transmission and control function.
As shown in Figure 2, hydraulic power unit is made up of a plurality of magnetic control shape memory alloy rods and plunger, cylinder body, end cap, one-way valve, sealing, magnetic field coil, iron core etc.The magnetic control shape memory alloy rod is connected through known mode with plunger and is hinged with front cover; One-way valve is embedded in respectively in the imbibition and discharge opeing loop of each plunger in the cylinder body; Magnetic field coil embeds in the cylinder body and covers the whole stroke of magnetic control shape memory alloy rod in deformation process, and the lead-in wire of magnetic field coil is connected with the digital drive controller through cable.
As shown in Figure 2, magnetic control shape memory alloy rod materials used is a Ni-Mn-Ga alloy bar 2, i.e. the marmem rod of nickel manganese gallium alloy rod making.Ni-Mn-Ga alloy bar energy density is big, and electricity-machine coupling factor is high, and ouput force is big, and deformation displacement is big, and its strain surpasses 10%.Ni-Mn-Ga alloy deformation displacement response is fast, is generally less than ms; Frequency response is fast, and stable output is arranged in the 150Hz scope.
As shown in Figure 2, magnetic field excitation device 1 is made up of with unshakable in one's determination magnetic field coil, and the magnetic field coil energising applies magnetic field for magnetic control memory alloy rod through iron core, is connected with adopting known technology between the cylinder body.Adopt 7 sealings of polyimide material seal ring between plunger and the plunger hole, adopt O type circle to seal between end cap 8,9 and the cylinder body 3, each plunger and front cover connect together through hinged, and end cap is connected through screw with cylinder body, and each one-way valve and cylinder body are through being threaded.Each magnetic field coil lead-in wire concentrates in together and adopts connector to link to each other with the digital drive controller.
As shown in Figure 2, number of plungers should preferably adopt odd number more than two, is generally 7 or 9.
The present invention does not relate to all identical with the existing technology existing technology that maybe can adopt of part and realizes.
Claims (2)
1. numerical control hydraulic power unit based on magnetic control shape memory alloy; It mainly is made up of digital drive controller (10) and the hydraulic power unit body (11) that is electrically connected with it; It is characterized in that described hydraulic power unit body (11) comprises cylinder body (3) and rear end cover (8) that links to each other with cylinder body (3) and front cover (9), cylinder body (3) is provided with two plunger holes (12) at least, and plunger (6) is installed in the plunger hole (12); Seal ring (7) is sleeved on the plunger (6); One end of plunger hole (12) communicates with high pressure oil outlet and low pressure filler opening simultaneously, and in line check valve (4) is installed on the described low pressure filler opening, and oil extraction one-way valve (5) is installed on the described high pressure oil outlet; One end of plunger (6) offsets with the Returnning spring (13) that is installed in the plunger hole (12); The other end of plunger (6) links to each other with an end of magnetic control shape memory alloy rod (2), and the other end of magnetic control shape memory alloy rod (2) links to each other with hinge (14), and hinge (14) hinge is contained on the front cover (9); Around the plunger hole (12), be coated with magnetic field excitation device (1) in magnetic control shape memory alloy rod (2) whole travel range, magnetic field excitation device (1) is electrically connected with digital drive controller (10).
2. the numerical control hydraulic power unit based on magnetic control shape memory alloy according to claim 1; It is characterized in that described cylinder body (3) is provided with a low pressure oil pocket (15) that communicates with each low pressure filler opening, this low pressure oil pocket (15) links to each other with the output terminal of oil cylinder or oil hydraulic motor through oil pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101852443A CN101839268B (en) | 2010-05-27 | 2010-05-27 | Numerical control hydraulic power unit based on magnetic control shape memory alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101852443A CN101839268B (en) | 2010-05-27 | 2010-05-27 | Numerical control hydraulic power unit based on magnetic control shape memory alloy |
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| CN101839268A CN101839268A (en) | 2010-09-22 |
| CN101839268B true CN101839268B (en) | 2012-09-05 |
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| DE102015116783A1 (en) | 2015-10-02 | 2017-04-06 | Eberspächer Climate Control Systems GmbH & Co. KG | Metering pump, in particular fuel metering pump for a vehicle heater |
| JP2018161010A (en) * | 2017-03-23 | 2018-10-11 | 株式会社デンソー | Movable device, manufacturing method of movable device, and control method of movable device |
| CN107808804B (en) * | 2017-12-05 | 2019-04-12 | 中国石油大学(华东) | Magnetic shape memory alloy breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4955196A (en) * | 1988-10-17 | 1990-09-11 | Zhichun Lin | Internal energy engine (IEE) |
| CN1168715A (en) * | 1994-10-31 | 1997-12-24 | 大宇电子株式会社 | Hydrolic pump using shape memory alloys |
| CN201679801U (en) * | 2010-05-27 | 2010-12-22 | 南京晨光集团有限责任公司 | Numerical control hydraulic power unit based on magnetically controlled shape memory (MSM) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003081107A (en) * | 2001-09-10 | 2003-03-19 | Unisia Jkc Steering System Co Ltd | Steering damper |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4955196A (en) * | 1988-10-17 | 1990-09-11 | Zhichun Lin | Internal energy engine (IEE) |
| CN1168715A (en) * | 1994-10-31 | 1997-12-24 | 大宇电子株式会社 | Hydrolic pump using shape memory alloys |
| CN201679801U (en) * | 2010-05-27 | 2010-12-22 | 南京晨光集团有限责任公司 | Numerical control hydraulic power unit based on magnetically controlled shape memory (MSM) |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2003-81107A 2003.03.19 |
| 张庆新.磁控形状记忆合金执行器及其控制系统的研究.《电机与控制学报》.2004,第8卷(第3期), * |
| 王凤翔.磁控形状记忆合金蠕动型直线电机研究.《中国电机工程学报》.2004,第24卷(第7期), * |
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