CN1276049A - Compressor Piston Assemblies for Stirling Cycle Systems - Google Patents
Compressor Piston Assemblies for Stirling Cycle Systems Download PDFInfo
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- CN1276049A CN1276049A CN 97182465 CN97182465A CN1276049A CN 1276049 A CN1276049 A CN 1276049A CN 97182465 CN97182465 CN 97182465 CN 97182465 A CN97182465 A CN 97182465A CN 1276049 A CN1276049 A CN 1276049A
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Abstract
A displacer assembly for a Stirling cycle system includes a displacer and a synchronous linear electric motor linked so as to drive the displacer. The electric motor features at least one stator assembly having first and second soft-magnetic pole pieces defining therebetween a gap. The width of the gap is oriented perpendicular to an axis of movement of the motor, and the stator assembly is constructed so as to generate a magnetic field aligned primarily parallel to the width of the gap. The motor also includes at least one compound permanent magnet system which has a first section axially displaced from a second section, and magnetized opposite directions.
Description
FIELD OF THE INVENTION and background
The present invention relates to Stirling (stirling) circulator, or rather, relate to the stirling cycle system that the displacer that is driven by the synchronous linear electric motor that has the magnetic spring is arranged.
It is known that stirling cycle system is used for cooling.Stirling cycle system comprises two main movement parts that all move back and forth.A this movement parts is commonly referred to " displacer (displacer) ", and being made generally in can be with the plunger of certain interval along cylinder moving.This is used for shifting along the direction of alternation the gas of certain mass between the two ends of cylinder.Displacer is connected to the compressor that produces fluctuation pressure in gas.By with the frequency identical with compressor, but certain phase difference is arranged between them, drive displacer, this system plays a heat pump, takes heat away from an end of displacer.So, stirling cycle system can be as the basis of a series of refrigerating systems.
In order to keep stirling cycle system to move efficiently, the phase relation between compressor and the displacer must be optimized.This phase relation is the most common to be to keep by means of the mechanically contact between compressor and the displacer.Yet, make a kind of like this contact allow adjust phase relation or amplitude is very difficult.In addition, mechanically contact tends to transmitting vibrations between two parts of system, makes this contact itself or system as a whole unreliable.
Another kind method is to adopt the isolating construction of a kind of use " passive " displacer assembly, and wherein displacer works the piston that floats.By the natural mode shape that displacer assembly is designed to reach correct, displacer is exported in response to compressor, and the phase place that its athletic performance goes out with compressor itself has correct phase difference.Yet the demarcation of passive displacer system and adjustment are difficult to realize.A kind of like this example of system is the United States Patent (USP) № 4862695 of Kushnir, wherein is provided with three complicated spring damping mechanisms so that carry out the adjustment of displacer movement.
In a kind of trial of the control of the improvement of the shortcoming that realizes not having mechanically contact, the United States Patent (USP) № 4397155 of Davey has described the Stirling circulator of a kind of having of " active " displacer assembly, wherein the relation between the motion of displacer and compressor is controlled by calutron independently, and this calutron plays motor in one embodiment.This motor comprises that carried by the displacer plunger and can a move coil in the magnetic field of fixed magnet.
The Davey machine has some advantages.Yet the efficient of this system is subjected to the serious restriction of used electric motor structure.Specifically, motor is painted as the single cylinder coil that axially moves in the cylinder air gap of permanent magnetic circuits.Described electric motor structure provides inefficient and does not have self-centering character.Such system also needs self-cleaning contact, and this is insecure.
In addition, the displacer of Davey machine, same with every other Stirling displacer, need multiple spring element that displacer is reset to its neutral position.This mechanical spring element proposes many design problems, is difficult to adjust, and aggravation mechanical wear, and increase audible noise.
Thereby needing a kind of stirling cycle system that electric motor driven displacer is arranged, this displacer has the magnetic spring effect and does not need mechanical contacts.It also will be favourable that the stirling cycle system that comprises such displacer is arranged.
The summary of invention
The present invention is a kind of Stirling circulation displacer that is driven by the synchronous linear electric motor that has the magnetic spring, and a kind of stirling cycle system that comprises this displacer.
Provide a kind of displacer assembly that is used for stirling cycle system according to of the present invention teaching, comprising: (a) displacer; And (b) synchronous linear electric motor, be operably connected so that drive this displacer, this motor has an axis of movement, this motor comprises: (i) at least one stator module, this stator module has the 1st and the 2nd soft magnetic pole piece, define an air gap betwixt, the width of this air gap is orientated to perpendicular to this axis, and stator module is so constructed so that be parallel to width of air gap ground substantially and produces consistent magnetic field; And (ii) at least one is positioned at the compound permanent-magnet system within this air gap, this compound permanent-magnet system comprise one along the 1st direction that is parallel to width of air gap magnetized the 1st section and one from the 1st section axially displaced along with magnetized the 2nd section of the 1st section opposite direction, the effect of this motor magnetize spring, when not having electric power to supply to this motor, it resets to predetermined resting position to displacer.
According to another feature of the present invention, this stator module comprises a coil, and the variation that puts on the voltage of this coil causes the respective change of the axial force between this stator module and the compound permanent-magnet system.
Also provide a kind of stirling cycle system according to of the present invention teaching, comprising: (a) compressor; (b) displacer; And (c) synchronous linear electric motor, be operably connected so that drive this displacer, wherein this motor is so constructed, so that a magnetic spring is provided, cause when not having electric power to supply to this motor, displacer resets to predetermined resting position.
According to another feature of the present invention, motor has an axis of movement, this motor comprises: (a) at least one stator module, this stator module has the 1st and the 2nd soft magnetic pole piece, define an air gap betwixt, the width of this air gap is orientated to perpendicular to this axis, and this stator module is so constructed so that be parallel to width of air gap ground substantially and produces consistent magnetic field; And (b) at least one is positioned at the compound permanent-magnet system within the air gap, this compound permanent-magnet system comprise one along the 1st direction that is parallel to width of air gap magnetized the 1st section and one from the 1st section axially displaced along with magnetized the 2nd section of the 1st section opposite direction.
According to another feature of the present invention, compressor comprises at least one synchronous linear electric motor, be called " air compressor motor ", this air compressor motor is so constructed so that a magnetic spring is provided, cause when not having electric power to supply to air compressor motor, compressor resets to predetermined resting position.
According to another feature of the present invention, air compressor motor comprises: (a) at least one stator module, this stator module has the 1st and the 2nd soft magnetic pole piece, define an air gap betwixt, the width of this air gap is orientated to this axis of movement perpendicular to this motor, and stator module is so constructed so that be parallel to width of air gap ground substantially and produces consistent magnetic field; And (b) at least one is positioned at the compound permanent-magnet system within the air gap, this compound permanent-magnet system comprise one along the 1st direction that is parallel to width of air gap magnetized the 1st section and one from the 1st section axially displaced along with magnetized the 2nd section of the 1st section opposite direction.
According to another feature of the present invention, compressor comprises at least one synchronous linear electric motor, be called " air compressor motor ", this system also comprises a voltage source, and displacer motor and air compressor motor are operably connected so that driven by this voltage source.
According to another feature of the present invention, at least one also is set is connected element between this voltage source and one of displacer motor and air compressor motor, in order to adjust the relative phase between compressor and the displacer with variableimpedance.
Brief description of drawings
Here only with reference to the accompanying drawings to describe the present invention, in these accompanying drawings by example:
Fig. 1 constitutes and work according to of the present invention teaching, and is used for the cutaway view of the displacer assembly of stirling cycle system;
Fig. 2 passes according to of the present invention teaching and constitutes and work, is used for displacer assembly with Fig. 1 to share and form the sectional view of synchronous two reciprocating-piston compressor equipment of stirling cycle system;
Fig. 3 is the schematic side cutaway view that is illustrated in flux pattern during the equipment work of Fig. 2;
Fig. 4 A is the perspective illustration of iron core of stator module that is used for the equipment of Fig. 2;
Fig. 4 B is the sectional view that passes the stator core of Fig. 4 A;
Fig. 4 C is the end-view of the stator core of Fig. 4 A;
Fig. 5 A is the 1st cross section and perspective of being made by ferrite that substitutes stator core structure;
Fig. 5 B is the 2nd cross section and perspective of being made by ferrite that substitutes stator core structure;
Fig. 6 A is the perspective illustration of piston magnet assemblies that is used for the equipment of Fig. 2, and this assembly comprises a compound permanent-magnet system;
Fig. 6 B is a kind of perspective illustration of instead of piston magnet assemblies that is used for the equipment of Fig. 2;
Fig. 7 A is the schematic side cutaway view that passes the piston magnet assemblies of Fig. 6 A;
Fig. 7 B is scheming with like Fig. 7 category-A of a kind of alternative composite permanent-magnet system structure of expression;
Fig. 8 is the perspective illustration of magnetic compensation mechanism that is used for the equipment of Fig. 2;
Fig. 9 is a kind of sectional view of modification that passes the equipment of Fig. 2;
Figure 10 A is the sectional view that passes a kind of form stator core of the equipment that is used for Fig. 9;
Figure 10 B is the sectional view that passes a kind of alternative form stator core of the equipment that is used for Fig. 9;
Figure 11 A and Figure 11 B are the sectional view of expression by the flux pattern of the generation of the stator form shown in Figure 10 A and Figure 10 B; And
Figure 12 is the schematic diagram of stirling cycle system that comprises the compressor apparatus of the displacer assembly of Fig. 1 and Fig. 2.
The description of most preferred embodiment
The present invention is a kind of Stirling circulation displacer that is driven by the synchronous linear electric motor that has the magnetic spring and the stirling cycle system that comprises this displacer.
Can understand operation principle better with reference to accompanying drawing and related description according to stirling cycle system of the present invention.
Referring now to accompanying drawing, Fig. 1 illustrates according to of the present invention teaching and constitutes and work, is used for stirling cycle system, and total label is 100 displacer assembly.Displacer assembly 100 can be advantageously share so that constitute stirling cycle system with the compressor of any kind.Yet, in most preferred embodiment, use synchronously two reciprocating-piston compressor equipment according to a stirling cycle system of the present invention.A kind of like this compressor, as the whole by reference relevant U.S. Patent application № 08/599206 common co-pending that proposes on February 9th, 1996 that is included in herein, be issued as the object of United States Patent (USP) № 5963991 on December 2nd, 1997, will describe with reference to Fig. 2～Figure 11 below.
In general, displacer assembly 100 comprises that 102, one regenerators 104 of displacer of a hollow cylinder form move along this hollow cylinder.Regenerator 104 has been configured the effect of heat exchanger, for example is drawn as a thin cylinder 106 that comprises a plurality of wire nettings 108 that form the cylinder matrix here.
What be operably connected to displacer 102 via drive rod 110 is a synchronous linear electric motor 112.Motor 112 is characterised in that its structure is designed to provide a magnetic spring, causes when not having electric power to supply to this motor, and displacer 102 resets to a predetermined resting position.
This one the style of writing in be noted that when speaking of the position of " displacer ", this is construed as the movable member that refers to displacer, be regenerator 104 in this occasion, the position.
The present feature of displacer assembly 100 is in more detail described the optimum structure that is used for motor 112 with reference to an axis of movement 114.Preferably, the axis conllinear of axis 114 and displacer 102, but also can alternatively use non-colinear mechanically contact.
Preferably, motor 112 comprises the stator module unshakable in one's determination 116 that at least one has the iron core that is provided with the 1st and the 2nd pole piece 118 that defines an air gap 120 betwixt.Pole piece 118 is that made by soft magnetic material and such layouts, promptly is equivalent to the size of " width " that be called air gap 120 of two shortest distance lines between the pole piece, is orientated to perpendicular to axis 114.Stator module 116 comprises that also at least one produces the coil 122 in consistent magnetic field with iron core is supporting so that be parallel to the width of air gap 120 substantially.
What be positioned at air gap 120 is at least one compound permanent-magnet system 124.Compound permanent-magnet system 124 comprises along the 1st direction of the width that is parallel to air gap 120 magnetized the 1st section 126 and axially displaced and along magnetized in the opposite direction the 2nd section 128 with the 1st side from the 1st section 126.The the 1st and the 2nd section 126 and 128 direct adjacency just forms a banjo fixing butt jointing betwixt.Otherwise they can axially leave a bit a little.
Electric motor structure described here provides some to surpass the advantage of Davey structure above-mentioned.It should be noted that most that when not applying electric current motor 112 plays the non-contact magnetically spring, displacer is resetted and remain on the resting position of wanting.This one comes from the minimum energy position of the good design of compound permanent-magnet system 124 from the centering effect, and maximum flux closure takes place the soft magnetic material that passes pole piece 118 there.As a result, mechanical spring element and related efficient and integrity problem thereof can omit from the displacer assembly design fully.
Another advantage of described electric motor structure is that the problem of slip electric terminal has been avoided in the fixed coil configuration.The compound magnet motor configurations also provides extra high efficient.
The diagram that should be appreciated that the motor 112 that draws here is schematic.Though can adopt single axial arranged magnet system 124, electric motor structure is not limited to a kind of like this configuration.Other possible realizations include, but are not limited to, the magnet system of the columnar and polygonal cross-section of those that address in the style of writing of compressor arrangement below being similar to.
In order to finish the description of Fig. 1, motor 112 preferably is fixedly mounted in the outside cylinder of displacer 102 by public housing 130.Housing 130 common peculiar linear bearing and dynamic seals around drive rod 110.Realize in order to constitute being connected of stirling cycle system between displacer 102 and the compressor via gas inlet tube 132 and tube connector 134.
As previously mentioned, displacer assembly 100 can advantageously share with any compressor design.Synchronization, amplitude control, and the emulation of various mechanical damping effects can realize by the Electronic Control of oscillating current source and supporting circuit.Preferably, by use public oscillation source to realize having synchronization between compressor and the displacer add ons of suitable resistance or carry out the phase place adjustment for both by other numeral or analogy method by use.
Preferably, displacer assembly 100 is shared those the compressor of character that is similar to above-mentioned motor 112 by its design and is share with one.The different example of this compressor will be described now.
Referring now to the optimal compressor structure, Fig. 2 illustrates a kind of teaching according to the present invention and constitutes and work, and total label is 10 compressor.In general, compressor 10 comprises 12, two identical fixing so that produce the stator module 14 of concentrating the alternation radial magnetic field in zone 16 with respect to cylinder 12 of a cylinder, and pair of pistons magnet assemblies 18.Each piston magnet assemblies 18 comprises a piston 20 that can slide and one group of compound permanent-magnet system 22 that is arranged in zone 16 in the part of cylinder 12.When stator module 14 was encouraged by an alternating current, alternating axis was used on the compound permanent-magnet system 22 to masterpiece, causes piston 20 synchronous backward reciprocating motion in cylinder 12 whereby.The reciprocating motion of piston 20 in cylinder 12 causes oscillation pressure at the center of cylinder 12.
For clarity, be noted that " axially " speech that uses refers to the direction or the size of the central axis that is parallel to cylinder 12 here in specification and claims.In like manner, " radially " speech that uses in specification and claims here refers to direction or the size perpendicular to this axis.
Though the present invention is described as a kind of single air cylinder structure here, it can repack a kind of a plurality of cylinder system at an easy rate into.The synchro system of one group of parallel operation can couple together in its outlet.Otherwise one group of cylinder can be combined into one and have one group of interconnective single device of respectively admitting the cylinder hole of a pair of opposed piston magnet assemblies of circumference.
The present feature of compressor 10 in more detail, cylinder 12 has endoporus, this endoporus by high-precision grinding so that admit piston 20.An outlet 24 is connected to the internal volume near its center of cylinder 12.For the pumping purposes that wherein needs net flow, can add an additional inlet tube and some suitable valve (not shown)s of arranging.
Important being characterised in that of compressor of the present invention, cylinder 12, stator module 14 and piston magnet assemblies 18 be arranged in co-axial alignment accurately.For the ease of the accurate centering of stator module 14 with respect to cylinder 12, compressor 10 is characterised in that the flange that radially extends that integrally forms at the center of cylinder length and cylinder 12.
Refer now to stator module 14, each stator module comprises the iron core that at least one coil 26 and are made up of the stator block 28 of one or more pairs of axis symmetric arrays about cylinder 12.Stator module 14 preferably is set independently so that drive each piston magnet assemblies 18.Each stator module 14 is connected in flange 13.Otherwise stator module 14 can be as following with reference to Fig. 9 explanation, along most of length extension of cylinder 12 so that around the setting area, two ends 16 of cylinder 12.
One of the present invention specifically is characterised in that, stator module 14 produces radially a magnetic field pattern substantially that concentrates within the zone 16.In order to reach this result, stator block 28 general appearance become to pass the closed substantially magnetic circuit of coil 26.Zone 16 is defined by the narrow crack that forms between air-gap surface 30 and 31 in the stator block 28.Be shown in Fig. 3 with the corresponding flux pattern of the view of Fig. 2.
In a most preferred embodiment, the three pairs of stator blocks 28 are arranged by the hexagonal symmetry about the axis of cylinder 12, as shown in Fig. 4 A, 4B and 4C.Stator block 28 preferably is made of one group of lamination that is parallel to flow direction, whereby magnetic loss is reduced to minimum.
Air-gap surface 30 becomes with 31 appearance with the shape of compound permanent-magnet system 22 to match.For example, they are normally crooked so that cooperate the columnar magnet design that will describe with reference to Fig. 6 A below.Otherwise, can adopt parallel plane air-gap surface 30 and 31 so that cooperate the compound permanent-magnet system of polygonized structure, as will be below with reference to as described in Fig. 6 B.
In order coil 26 to be connected to the setting of power supply (not shown) independently with reversible to be connected (not shown) normally favourable.This allows the structure of piston magnet assemblies 18 and does not need unique polarity of determining each used magnet.Can carry out a polarity check program then and whether produce needed opposite piston motion so that determine the configuration of used magnet, and if necessary, can be the pole reversal of a coil 26.This polarity check program will be described below.Also may wish to enable between the parallel connection and serial connection of coil 26 to switch.
As to the substituting of the stator structure of above-mentioned lamination, the iron core of stator module 14 can be made of by mode commonly known in the art ferrite.Ferrite is used for stator module 14 makes additional stator structure become possibility.For example, stator module 14 can constitute the rotary body with any disclosed stator cross section, produces magnetic field whereby in the zone 16 with circular symmetry.For the ease of the assembling of stator module 14, ferrite core is made up of two sections or multistage usually, and these sections are fixed together then.Fig. 5 A illustrates one and wherein adopts three example of structure.Fig. 5 B illustrates a kind of two structures of simplification.
Refer now to the feature of piston magnet assemblies 18, this most clearly is shown in Fig. 6 A and Fig. 7 A.Piston magnet assemblies 18 comprises piston 20 and the compound permanent-magnet system 22 that is connected via air gap 32.
Compound permanent-magnet system 22 is formed by the 1st section 34 and the 2nd sections 36, the 1st section be magnetized into its direction of magnetization with respect to the axis of cylinder 12 for radially, the 2nd section be adjacent to the 1st section and from the 1st section 34 axially displaced, it is opposite with the 1st section 34 the direction of magnetization to be magnetized into its direction of magnetization.Usually make respectively for the 1st and the 2nd section 34 and 36 and couple together by the bonding of any suitable type then.
In a most preferred embodiment, the 1st and the 2nd section 34 and 36 is the cylinder magnet of the diametrical magnetization as shown in Fig. 6 A.Otherwise, can form by one group of plane permanent magnet for every section, these magnet are installed together and form the polygon of a rule, as shown in Fig. 6 B.In both cases, the 1st and the 2nd section 34 and 36 is the enclosed constructions about its axis symmetry, provides accurate centering the needed rigidity of structure whereby.Certainly, the air-gap surface 30 of stator block 28 and 31 appearance become the shape with the compound permanent-magnet system 22 of matched in clearance of about 0.1～1mm between compound permanent-magnet system 22 and each air-gap surface 30 and 31.
Fig. 7 B illustrates a kind of alternative structure of the piston magnet assemblies of Fig. 6 A and Fig. 6 B.In this structure, a magnetic conductive material layer 38 that integrally forms with end cap 32 forms an iron core that compound permanent-magnet system 22 constitutes thereon.Layer 38 also can integrally form with piston 20.Then the 1st section 34 with the 2nd section 36 respectively by suitably permanent magnet magnetized being connected on the surfaces externally and internally of layer 38 forms.
When assemble compressible machine 10, stator module 14 is installed around cylinder 12 with fixing relation, causes it that the zone 16 of one group of symmetric arrays is provided near every end of cylinder 12.Piston magnet assemblies 18 is positioned at every end of cylinder 12, and piston inserts the cylinder hole of cylinder 12 and compound permanent-magnet system 22 inserts zone 16.Be connected in the sliding scale of the internal stop 42 limited piston magnet assemblies 18 of stator block 28, prevent the collision of piston 20 whereby.Compressor 10 common its features also are to provide support housing 44 with rigidity for total.The outer link stopper 45 that is connected in housing 44 prevents that piston magnet assemblies 18 is from the outside overshoot of the normal range (NR) of its service position.Block 42 and 45 is preferably made by the elastic-like material of for example natural rubber or synthetic rubber.
A best features of the present invention is, the gap air gap between air-gap surface 30,31 and the compound permanent-magnet system 22 significantly greater than, want big one or two order of magnitude, the gap air gap between the endoporus of piston 20 and cylinder 12 usually.This feature guarantees that pump action protects the mechanically soft magnetic part of compressor 10 to exempt from unnecessary wearing and tearing simultaneously efficiently.Gap air gap between air-gap surface 30,31 and the compound permanent-magnet system 22 should not strengthen to such an extent that surpass the needed degree of protection protected from wear because the zone 16 of being caused widen the weakening that will cause magnetic field.
Refer now to the work of compressor 10, when coil 26 is encouraged by alternating current, radially the magnetic field substantially of generation alternation in zone 16.Along with the increase along the 1st direction magnetic field, consistent with this magnetic field section 34 that is magnetized into of compound permanent-magnet system 22 is attempted in this magnetic field to center-aligned, and magnetized on the contrary section 36 be ostracised.Making a concerted effort only of these power is pure axial force on each compound permanent-magnet system 22, and this power is delivered to piston 20 via end cap 32.When this FR, this power is reverse, promotes piston 20 whereby in the opposite direction.So the alternating current supply makes compound permanent-magnet system 22, thereby make piston 20, axially reciprocating.
Be noted that compressor 10 need not be the spring of feature without exception in the linear compressor of routine.Because the opposing magnetic pole structure of compound permanent-magnet system 22, piston magnet assemblies 18 will not tend to the resting position of a centering naturally when having electric current in coil 26.
As mentioned above, coil 26 preferably is provided with and has independently being electrically connected of switchable polarity.This feature allows the formation of piston magnet assemblies 18 and does not need unique polarity of determining each used magnet.So, before using compressor 10, carry out a polarity check program.This polarity check program needs cranked coil to apply non-alternation (direct current) voltage and observes the direction of displacement of two piston magnet assemblies.If both inwardly draw towards cylinder 12, perhaps otherwise both leave cylinder and outwards move, then obviously the connection of coil is correct for the polarity of magnet.On the other hand, if inwardly motion and another the outside motion of piston magnet assemblies, then conversely the polarity of a coil 26.
With reference to Fig. 8, the additional best features that is used for the compensating field deformity of compressor 10 is described now.As mentioned above, be used for making compressor 10 parts material intrinsic variation and the franchise when producing them, may cause symmetric deformity in the magnetic field of the 16 li generations in zone.This deformity may cause slight uncompensated radial load, this radial load may cause additional friction energy loss, and the wearing and tearing to piston 20 that increased.
Thereby a best features of the present invention is, compressor 10 peculiar one be used for revising the magnetic compensation mechanism in magnetic field so that the frictional power loss of duration of work compressor 10 and vibration are reduced to minimum.
Fig. 8 illustrates one of magnetic compensation mechanism example, and total label is 46, is used for magnetic field in the modification region 16.Mechanism 16 comprises that one is made the recess 50 that has the part (seen in Fig. 4 A) that is used for meshing stator module 14 and the annulus 48 of screw thread radial hole 52.One group of plug-in unit 54 of being made by soft magnetic material is made the threaded that cooperates radial hole 52.One of the material example that is suitable for making plug-in unit 54 is the material that can buy by trade name Carpenter 49.
When annulus 48 is positioned stator block 28 and plug-in unit 54 when putting radial hole 52 into, the end of each plug-in unit 54 remains close to two compound permanent-magnet systems 22.On this position, plug-in unit 54 causes the adjustment of the radial position of plug-in unit 54 with respect to the turn of the screw thread of radial hole 52, thereby causes it and the adjustment of zone 16 distance.So the soft magnetic material of plug-in unit 54 can be used for the magnetic field pattern in the modification region 16 when compressor 10 is being worked to the variable vicinity of compound permanent-magnet system 22, friction loss in compressor 10 and vibration reduce to minimum.
In fact, a kind of effective method of optimizing the performance of compressor 10 with magnetic compensation mechanism 46 is to realize the minimal power loss by adjusting plug-in unit 56.It is by encouraging compressor 10 with given alternating voltage and monitoring absorption current.Then simultaneously or adjust plug-in unit 56 in turn up to electric current minimum generally.
As substituting with reference to a kind of of the described magnetic compensation of Fig. 8 mechanism, can arrange additional winding (not shown) and supply direct current selectively around each stator block 28 to top.Change the electric current of the additional winding of one or more stator blocks 28 of flowing through with rheostat or other current control devices.This has the effect that is similar to adjustment plug-in unit 56 in magnetic compensation mechanism 46, and ground similar to the above balance radial load.
With reference to Fig. 9, will describe now according to according to the present invention teaching and constitute and total label of work is a kind of modification of 56 compressor.Compressor 56 is substantially similar to compressor 10, and the element of equivalence has identical label.In this occasion, stator module 14 is lengthened out, so that provide required magnetic field in the two ends of cylinder 12 are in zone 16.Figure 10 A and Figure 10 B are illustrated in two kinds of possible forms of stator block 28 among this embodiment.Figure 11 A and Figure 11 B illustrate respectively the corresponding flux pattern of form with Figure 10 A and Figure 10 B.
Should also be noted that and comprise the linear bearing 40 that does not have in the compressor 10 in the compressor 56.Linear bearing 40 helps to keep needed high accuracy centering between piston magnet assemblies 18 and the cylinder 12.Linear bearing 40 can be directly connected on the cylinder 12, perhaps via connector it is fixed in stator block 28 to normal incidence or is fixed in another part fixing with respect to cylinder 12 of compressor 10.
At last, with reference to Figure 12, the schematic diagram of teaching a kind of stirling cycle system that constitutes and work according to of the present invention is shown.This system utilizes displacer assembly 100 together with compressor 10.For example, in order to guarantee the synchronism of two elements, a control system 60 is set.In the simplest a kind of realization, control system 60 comprises an alternating-current voltage source 62 and a phase change device 64.An element is a compressor 10 in this occasion, is directly connected to this voltage source 62, and another element is a displacer assembly 100 in this occasion simultaneously, is connected to this voltage source via phase change device 64.Because but two outputs that provided by control system 60 are synchronously phase shifting, thus guaranteed air compressor motor and displacer motor required synchronously.
As previously mentioned, phase change device 64 can have the add ons of suitably impedance or carry out the phase place adjustment by other numeral or analogy method by employing.In addition, can comprise various elements so that the equivalent of viscous friction retardance or other mechanical effects is provided.Obviously, voltage source 62 and phase change device 64 can be used as the device that separates that is generically and collectively referred to as control system and realize, perhaps can be combined into single control device.
Should be appreciated that foregoing description only as example, and many within the spirit and scope of the present invention other embodiment are possible.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB971824657A CN1142399C (en) | 1997-12-01 | 1997-12-01 | Displacer assembly for stirling cycle system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB971824657A CN1142399C (en) | 1997-12-01 | 1997-12-01 | Displacer assembly for stirling cycle system |
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| CN1276049A true CN1276049A (en) | 2000-12-06 |
| CN1142399C CN1142399C (en) | 2004-03-17 |
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| CNB971824657A Expired - Fee Related CN1142399C (en) | 1997-12-01 | 1997-12-01 | Displacer assembly for stirling cycle system |
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| CN110107476A (en) * | 2019-04-19 | 2019-08-09 | 上海理工大学 | The error-correction structure of sterlin refrigerator linear compressor piston biasing |
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1997
- 1997-12-01 CN CNB971824657A patent/CN1142399C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101621239B (en) * | 2008-06-30 | 2012-07-04 | 中科力函(深圳)热声技术有限公司 | Piston-type acoustoelectric electroacoustic transduction motor |
| CN102985692A (en) * | 2010-08-05 | 2013-03-20 | Lg电子株式会社 | Linear compressor |
| US9261088B2 (en) | 2010-08-05 | 2016-02-16 | Lg Electronics Inc. | Linear compressor |
| CN102985692B (en) * | 2010-08-05 | 2016-05-04 | Lg电子株式会社 | linear compressor |
| CN111765664A (en) * | 2013-08-02 | 2020-10-13 | 查特股份有限公司 | Cryogenic refrigerator with magnetically reciprocating piston |
| CN105556813A (en) * | 2013-08-02 | 2016-05-04 | 查特股份有限公司 | Cryogenic refrigerator with magnetic reciprocating piston |
| CN111765664B (en) * | 2013-08-02 | 2022-04-05 | 查特股份有限公司 | Cryogenic refrigerator with magnetically reciprocating piston |
| CN104048436A (en) * | 2014-06-13 | 2014-09-17 | 中国电子科技集团公司第十六研究所 | Linear integral stirling cryocooler |
| CN104048436B (en) * | 2014-06-13 | 2016-03-09 | 中国电子科技集团公司第十六研究所 | A kind of linear integral-type Stirling refrigerator |
| CN104406320A (en) * | 2014-08-14 | 2015-03-11 | 宁波华斯特林电机制造有限公司 | Magnet supporting structure of Stirling cycle machine |
| CN111490661A (en) * | 2019-01-29 | 2020-08-04 | Lg电子株式会社 | Compressor provided with motor |
| US11482896B2 (en) | 2019-01-29 | 2022-10-25 | Lg Electronics Inc. | Compressor provided with a motor |
| CN110107476A (en) * | 2019-04-19 | 2019-08-09 | 上海理工大学 | The error-correction structure of sterlin refrigerator linear compressor piston biasing |
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