CN1746496A

CN1746496A - Magnetic suspension pump

Info

Publication number: CN1746496A
Application number: CN200410051345.6A
Authority: CN
Inventors: 招慧霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-06
Filing date: 2004-09-06
Publication date: 2006-03-15
Also published as: US20070212237A1

Abstract

A magnetic suspension pump comprises a permanent magnet cylinder and a piston formed by a permanent magnet circle. The magnetic pole of the piston's outer wall is same with that of cylinder's inner wall. On the top of the cylinder installs a magnet circle, the magnetic pole of the circle faced to the cylinder is same with that of corresponding piston's circle. This invention is capable of saving energy effectively and working without friction so almost all the energy will be used to the pump. Saved energy is doubled compared to normal pump which is especially remarkable in the situation of tiny power waste. The device can work for a long term without maintain and parts change. It is especially good for medical equipments and those need to work continuously.

Description

Magnetic suspension pump

Affiliated technical field

The present invention relates to a kind of pump, particularly a kind of magnetic suspension pump.

Existing pump all exists operating life short, regularly to change parts easy to wear, because contact must cause wearing and tearing, particularly do not stop work in 24 hours pump life-span of doing is shorter, generally to will change parts in two years, and, and friction arranged or tension force is arranged even adopt best high-abrasive material also can produce wearing and tearing or perforation (diaphragm pump) at last, will produce resistance when high-speed motion (particularly resistance bigger) thus task performance is reduced, the conversion efficiency of promptly working reduces.

Goal of the invention

The object of the present invention is to provide a kind of novel and reasonable structure, can work in the magnetic suspension state that does not have frictional force, energy-efficient, durable reliable magnetic suspension pump.

Summary of the invention

Purpose of the present invention can reach by following measure: a kind of magnetic suspension pump, it is characterized in that: cylinder body is the permanent magnet magnetic cylinder, the piston of being made by permanent-magnetic clamp is positioned at cylinder body, the magnetic pole of piston outer wall is identical with the magnetic pole of inboard wall of cylinder block, in the port of cylinder body one magnet ring is set, its magnetic field polarity to the inboard one side of cylinder body is identical with the obverse polarity of piston ring.

Purpose of the present invention can also reach by following measure: magnet ring can adopt fixed magnet or electromagnet, and is arranged in the cylinder body.Cylinder body adopts upper cylinder body and lower cylinder body structure, the suspended piston that is positioned at upper cylinder body is connected by a vertical links with the suspended piston that is positioned at lower cylinder body, on connecting rod, be provided with two circular permanent magnets, at permanent magnet and two 180 degree places a pair of electromagnet is set, placed coil in the electromagnet, two groups of coils connect into the different name Ending.The place, two ends can be provided with two electromagnet respectively in the cylinder body, and controls by electronic circuit.Electronic circuit comprises the common-mode suppressed circuit, microcomputer control circuit, power amplification circuit, deliver to microcomputer control circuit by the change of magnetic field strength signal that electromagnet produces by the common-mode suppressed circuit, the signal driving power amplification circuit that microcomputer control circuit responds and instructs, the output signal of power amplification circuit is delivered to electromagnet.

The present invention has following advantage compared to existing technology:

1, novel and reasonable structure, energy-efficient, can work in the magnetic suspension state that does not have frictional force, all basically energy all are used on the pump energy, energy-conservation about one times of working efficiency than general pump, this will be very outstanding on little power consumption to being operated in.

2, durable reliable, can move and Maintenance free for a long time, more need not change parts, generally can continuous operation more than 10 years and Maintenance free more need not to change parts.Particularly to the instrument of some Medical Instruments and the successive work of needs, application advantage is particularly outstanding.

Description of drawings

Fig. 1 is a structural principle schematic representation of the present invention;

Fig. 2 adopts the structural representation of twin-tub symmetric type for the present invention;

Structural representation when Fig. 3 adopts electronic circuit control electromagnet mode for the present invention;

Electrical schematic diagram when Fig. 4 adopts electronic circuit control electromagnet mode for the present invention;

Fig. 5 is a magnetic circuit schematic diagram of the present utility model.

Embodiment

The present invention is described in further detail below in conjunction with accompanying drawing (embodiment):

With reference to Fig. 1, Fig. 5, the present invention mainly comprises the cylinder body 1 that is made of the permanent magnet magnetic cylinder, by the piston 2 that permanent-magnetic clamp is made, places the magnet ring 3 of cylinder body 1 port.The magnetcisuspension buoyancy aid is the piston 2 of pump, this piston 2 can move up and down in cylinder body 1, thereby realize that compression and absorption come work, balanced (the magnetic field i.e. magnetic force of 360 degree equates) on the wall cloth in cylinder body 1, actual cylinder body 1 is a permanent magnet, on the frame inwall, produce the magnetic field of an equilibrium, and piston 2 also is a permanent magnet, the magnetic pole of these circular piston 2 outer walls is identical with the magnetic pole of cylinder body 1 inwall, make this two permanent magnetism produce a repulsive force (same sex is repelled each other), owing to be the magnetic intensity equalization of circumference 360 degree,, it is pushed to the center so outer wall 360 degree of piston 2 all exist a repulsive force, can not contact with the cylindrical shape casing wall forever, motion gets up also can not be in contact with one another (piston 2 and cylinder body 1) like this, equates as long as guarantee the wall magnetic intensity of cylinder body 360 degree, just can realize this mechanism.Need only in the practical operation and select the suitable equilibrium that magnetic direction just is easy to realize 360 degree magnetic fields of dashing, and above-below direction can not need magnetic intensity to equate.So just can guarantee that piston 2 suspends at cylinder body 1 inwall, its movable direction can only be done up and down, as long as place another magnetic field in port direction, make its magnetic field polarity and the identical polarity of piston 2 corresponding surfaces, like this, this piston 2 just is limited to move within the specific limits, can limit the stroke of its acting, the simplest method is to place another fixed magnet ring 3 in the two ends of circular magnetic cylinder, but as long as magnet ring 3 is identical with piston 2 obverse polarity, just produce a repulsive force naturally, this repulsion guarantees that piston 2 can overshoot, can only be movable in the stroke that designs.All there is magnetic force in all directions around the piston 2 like this, make this pistons work in magnetic suspension state, as long as to the slight thrust of piston, the acting of will moving up or down, can also on both ends of the surface, add an alternating magnetic field, make piston move up and down and do work (promptly coming suction/repulsive force that permanent magnetic piston is moved up and down) by the polarity of converts magnetic field.

Adopt fixed magnetic field to come the stroke of limited piston, adopt the twin-tub symmetrical structure, lay a fixing magnet ring 3 in the bottom of upper cylinder body 4, and the magnetic pole of this magnet ring face is extremely identical with the corresponding surface magnet ring of piston 2 as Fig. 2.Can guarantee that piston magnetcisuspension buoyancy aid 6 can not collide with fixed magnet 3, because of magnetic field big more with the more little repulsion of die opening, particularly repulsion is very big during microspur, and the dynamics that two magnetic same polarities are repelled each other becomes how much level increases with distance, so can very effectively guarantee the piston stroke of upper cylinder body 1.And the other end lower cylinder body 5 also is to adopt upper cylinder body 4 same structures, has guaranteed that suspended piston 7 can not collide with fixing magnet ring 3.Because suspended piston 6 is to link to each other by a vertical links 8 to tighten up with suspended piston 7, be that upper cylinder body 4 is when upwards compressing, lower cylinder body 5 is to work in adsorbed state, because the existence of fixed magnet 3 is arranged, suspended piston 7 can be subjected to spacingly can not breaking through fixed magnet 3 these points, also can limit suspended piston 6, can not the overshoot upper top and the unidirectional mouthful bottle cap of leading collide.In like manner, lower cylinder body 5 works in compressive state when moving downward, and upper cylinder body 4 works in adsorbed state.Suspended piston 6 also can not collided with fixed magnet 3, that is guaranteed that suspended piston 7 can not collide with the unidirectional mouthful bottle cap of leading, even if high-speed motion gets up like this, also can not produce the Mechanical Contact noise, so the existing any pump of the pump operation noise ratio of this structure is all quiet.By above analysis, owing to there is not Mechanical Contact, just there is not mechanical wear, so the pump of this structure is to need to change parts never theoretically, working life is very long, during actual fabrication, as long as guarantee the magnetic suspension piston external diameter and fixedly the magnetic cylinder internal diameter be complementary, produced in the time of just guaranteeing acting pressure greatly (moment leaks gas little) as long as the cylinder that matches is constant, the pressure of its acting is also constant.If because other problem makes to wearing and tearing, after air gap increased, relative pressure will reduce.So the selection of this pump work of design air-gap separation under what pressure just seems very important, promptly the good airproof performance gap is little, the precision height, kiting is also high, and air gap is bigger, and pressure is little, precision is low, also low (the certain size of pressure that is decided by outside Driving force with the size of power of kiting.Say that just identical power seal performance has also played another part effect).And outside acting is to provide thrust by the bar 8 that cylinder links to each other outward, the generation of this thrust is to provide kinetic energy by two circular permanent magnets 9 and 10 magnetic fields that produce in the middle of electromagnet, and back and forth move up and down, because permanent magnet 9 and 10 both sides, 180 degree are placed a pair of electromagnet 11 and 12, coil 13 and 14 have been placed in the electromagnet 11 and 12, and twisted pair line circle 13, the 14th, connect into the different name Ending (promptly after the energising, the electromagnet that 180 degree are placed can produce identical magnetic pole) such magnet stress balance, the effect height, as long as the ac power supply of connecting, magnet can move up and down, and other this two magnet is limited by the external dimension of electromagnet can overshoot.Be that integral body all is suspended motion, do not contact, promptly can not be subjected to the existence of mechanical wear, thereby realize real magnetic suspension pump with any supporting mass.

With reference to figure 3, Fig. 4, entire pump has only a clutch release slave cylinder, the structure of cylinder body 1 all is the same, what only place in circular magnetic cylinder two ends is not fixed magnet, but

electromagnet

15 and 16, difference along with current direction, suction/row's the force direction that produces also changes thereupon, but this structure is complicated, controlled by electronic circuit, to on the stroke of circle tube cylinder 1 two port, place two magnetometric sensors, also

available electromagnet

15 and 16 comes with (being that electromagnet is done magnetic field and produced device simultaneously again when using as sensor as sensor, see accompanying drawing 4), want test permanent magnetic piston 2 working positions, thereby control current direction, its working principle is as follows: when connecting power supply, because of microcomputer control circuit 18 produces an oscillator signal, do not know during because of the period 1 where suspended piston 2 initial states are, suspended piston 2 moves up and down, when suspended piston 2 during near port, this port magnetic intensity also changes, this variation makes and is put near the sensor generation signal of port, this signal is faced upward system circuit 17 by common mode and is delivered to microcomputer control circuit 18, make its instruction that responds give power amplification circuit 19, make electric current in the other direction, magnetic field changes thereupon, pump becomes absorption work by original compression, and vice versa.Magnetic suspension piston 2 is moved up and down to do work, because

electromagnet

15 and 16 is the two-port places that are placed in cylinder body 1, polarity is opposite, and (promptly one produces suction, another produces thrust, and during the reverse current direction, just producing active force exchanges), so just very effective work, and precision is very high, working pressure or suction are constant, be that it is not to change by the time but judge when return motion by the volume of acting, promptly to inhale the merit volume the same with being fully loaded with the row who is done to unloaded, and the pressure/suction that produces in whole stroke is constant all the time, can be not suddenly big or suddenly small, this occasion to a lot of high-precision requirement is very useful, and promptly each process container equalization of arranging or inhaling can not be subjected to drag effects (as it is just very important to be used in medical aspect).This structure pump mechanical structure is very simple, the efficient height, and constant pressure, control is flexible, the precision height.

In addition this magnetic suspension pump can be operated in air pump aspect or fluid aspect can because this pump does not have lubricant oil, rubber is arranged, wearing and tearing etc. are arranged, so can be used on the different field.As be used in the occasion of etchant gas, because of there is not chemical reaction in permanent magnet, so be well suited for on-line operation in this occasion.As just passable in the corrosion-resistant body of permanent magnet outsourcing one deck when being operated in the fluid of corrosion, such as injection moulding one deck Nylon, be exactly a fine resistant material, molecular structure stabilized, nontoxic, self lubricity is good.Certainly modern material is a lot, and the workplace requires different, and the material of die casting is also inequality.

Claims

1, a kind of magnetic suspension pump, it is characterized in that: cylinder body (1) is the permanent magnet magnetic cylinder, the piston of being made by permanent-magnetic clamp (2) is positioned at cylinder body (1), the magnetic pole of piston (2) outer wall is identical with the magnetic pole of cylinder body (1) inwall, in the port of cylinder body (1) magnet ring (3) is set, its magnetic field polarity to the inboard one side of cylinder body is identical with the polarity of the corresponding anchor ring of piston (2).

2, pump according to claim 1 is characterized in that: magnet (3) can adopt fixed magnet ring or electromagnet, and is arranged in the cylinder body (1).

3, pump according to claim 1, it is characterized in that: cylinder body (1) adopts upper cylinder body (4) and lower cylinder body (5) structure, the suspended piston (6) that is positioned at upper cylinder body (4) is connected by a vertical links (8) with the suspended piston that is positioned at lower cylinder body (5) (7), on connecting rod (8), be provided with two circular permanent magnets (9) and (10), at permanent magnet (9) and (10) two 180 degree places a pair of electromagnet (11) and (12) are set, placed coil (13) and (14) in electromagnet (11) and (12), two groups of coils (13) and (14) connect into the different name Ending.

4, pump according to claim 1 is characterized in that: place, the interior two ends of cylinder body (1) can be provided with two electromagnet (15) and (16) respectively, and controls by electronic circuit.

5, according to claim 1 or 4 described pumps, it is characterized in that: electronic circuit comprises common-mode suppressed circuit (17), microcomputer control circuit (18), power amplification circuit (19), deliver to microcomputer control circuit (18) by the change of magnetic field strength signal that electromagnet (15) and (16) produce by common-mode suppressed circuit (17), the signal driving power amplification circuit (19) that microcomputer control circuit (18) responds and instructs, the output signal of power amplification circuit (19) are delivered to electromagnet (15) and (16).