CN203627132U - Oppositely-arranged moving coil linear compressor allowing radial magnetizing to be achieved through short coils - Google Patents

Oppositely-arranged moving coil linear compressor allowing radial magnetizing to be achieved through short coils Download PDF

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CN203627132U
CN203627132U CN201320740948.1U CN201320740948U CN203627132U CN 203627132 U CN203627132 U CN 203627132U CN 201320740948 U CN201320740948 U CN 201320740948U CN 203627132 U CN203627132 U CN 203627132U
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left part
yoke
coil
piston
displacement sensor
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党海政
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Shanghai Institute of Technical Physics of CAS
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Shanghai Institute of Technical Physics of CAS
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Abstract

本专利公开了一种采用短线圈径向充磁的对置式动圈直线压缩机，整体结构采用对置式以抵消左右两部分的机械振动，左部及右部除共用机座外，均由各自的气缸衬套、永磁体、上轭铁、下轭铁、载流线圈、线圈骨架、活塞、上板弹簧组、下板弹簧组、上压片结构、下压片结构、上支撑结构、下支撑结构、位移传感器铁芯、位移传感器线圈、位移传感器支撑、机壳组成；永磁体径向充磁，载流线圈采用短线圈；左部及右部的上轭铁、活塞以及载流线圈均需满足各自下轭铁底部的轴向厚度大于各自载流线圈的轴向高度与各自活塞的最大行程之和。本专利结构紧凑、振动低、电机效率高、预期寿命长，对高可靠、长寿命、高效率直线压缩机的发展具有重要意义。

This patent discloses an opposed moving coil linear compressor adopting radial magnetization of short coils. The overall structure adopts the opposed type to offset the mechanical vibration of the left and right parts. Cylinder liner, permanent magnet, upper yoke, lower yoke, current-carrying coil, coil bobbin, piston, upper leaf spring group, lower leaf spring group, upper pressing structure, lower pressing structure, upper supporting structure, lower Supporting structure, displacement sensor core, displacement sensor coil, displacement sensor support, and casing; the permanent magnet is radially magnetized, and the current-carrying coil adopts a short coil; the upper yoke, piston and current-carrying coil on the left and right are all It is required that the axial thickness of the bottom of each lower yoke is greater than the sum of the axial height of each current-carrying coil and the maximum stroke of each piston. The patent has the advantages of compact structure, low vibration, high motor efficiency and long life expectancy, and is of great significance to the development of high reliability, long life and high efficiency linear compressors.

Description

Adopt the opposed type moving-coil linear compressor of short coil radial magnetizing
Technical field
This patent relates to linear compressor, particularly a kind of opposed type moving-coil linear compressor that adopts short coil radial magnetizing.
Background technique
Linear compressor is the one of reciprocating-piston compressor.Traditional reciprocating-piston compressor belongs to rotary compressor mostly, adopts electric rotating machine to drive, realizes to-and-fro motion by the mechanical transmission of connecting rod etc.The technology of rotary compressor is comparatively ripe, but its energy transmission link is many, vibration and noise large, complete machine control complexity, energy conversion efficiency is on the low side, the lateral force particularly because of structural feature, piston being applied, be one of main source producing idle work and mechanical wear, thereby greatly limited its operating life.Linear compressor utilizes linear electric motor driven plunger to do reciprocating linear motion in cylinder, eliminate in theory the radial effect power to piston completely, thereby eliminate mechanical wear and the consequent idle work between piston and cylinder wall, operating life and energy conversion efficiency all improve greatly, so have very important application at the special dimension such as Aeronautics and Astronautics, military affairs that needs long lifetime and efficiency operation.
The core component of linear compressor is linear electric motor.Linear electric motor are mainly divided three classes according to moving element wherein: moving-iron type, moving coil and moving-magnetic type.Moving-iron type linear motor does not use permanent magnet, thereby price is cheaper, but performance is relatively unstable, control more difficult, its application gradually reduce; Moving coil and moving-magnetic type linear motor all comprise three class core components: permanent magnet, yoke and current-carrying coil are that moving coil and moving-magnetic type are divided in current-carrying coil or permanent magnet motion during according to motion.Wherein, moving coil linear compressor has been realized the elimination completely of radial force because of its structural feature, and on current-carrying coil, do not produce axial force and moment of torsion in when open circuit, thereby there is high efficiency, low noise and highly reliable outstanding advantages, thereby become the first-selected power source of the interior space regenerating type low-temperature refrigerator (as pulse tube refrigerating machine and sterlin refrigerator) of international coverage over nearly 30 years.Western developed country take the U.S. as representative is example, and in the space flight pulse tube refrigerating machine and sterlin refrigerator launching between nearly 20 years, the overwhelming majority has adopted moving coil linear compressor.
At present, be applied in the world space industry and need to guarantee that long lifetime, moving coil linear compressor highly reliable, efficiency operation mainly adopt Oxford type and opposed type structural type.So-called Oxford type, it is gained the name and comes from two key technologies of Regius professor---and clearance seal and leaf spring support, and these two technology are oil-free lubrication and key guarantee that can long lifetime running; So-called opposed type structural type, refers to and in agent structure, adopts two motions of equity and supporting structure mechanical vibration that self produce of cancelling out each other completely, this technology is to realize the reliable guarantee of the low vibration of linear compressor.
As previously mentioned, dynamic coil linear motor comprises three class core components: permanent magnet, yoke and current-carrying coil.When work, current-carrying coil is in permanent magnet and the common air gap forming of yoke, and magnetic field force induced effect, becomes reciprocal straight line motion.According to the magnetizing direction of the length of current-carrying coil and permanent magnet, dynamic coil linear motor can be divided into four kinds, Fig. 1 has provided the schematic diagram of these four kinds of forms, and wherein (1) is long loop axial charging form, (2) be short coil axial charging form, (3) be long loop radial magnetizing form, (4) are short coil radial magnetizing form, and wherein 63 is permanent magnet, 64 is upper yoke, 65 is lower yoke, and 66 is current-carrying coil, through hole centered by 67.
The kind of the linear electric motor that moving coil linear compressor adopts according to it, also be correspondingly divided into four kinds of forms, that is: adopted the moving coil linear compressor of the moving coil linear compressor of long loop axial charging, the moving coil linear compressor that adopts short coil axial charging, the moving coil linear compressor that adopts long loop radial magnetizing, employing short coil radial magnetizing.No matter moving coil linear compressor adopts any in above-mentioned four kinds of forms, if guarantee its energy stable operation, all must follow following basic principle: (1) or be in whole piston stroke, guarantee all the time steady magnetic field be in current-carrying coil within (corresponding to long loop form); (2) or be in whole piston stroke, guarantee all the time current-carrying coil (corresponding to short coil form) within stable magnetic field.The moving coil linear compressor of these four kinds of forms development at home is at present all at the early-stage.
Summary of the invention
This patent proposes a kind of opposed type moving-coil linear compressor that adopts short coil radial magnetizing.
The opposed type moving-coil linear compressor of the employing short coil radial magnetizing of inventing is by sharing support 0, left part cylinder liner 1, left part permanent magnet 2, yoke 3 on left part, left part lower yoke 4, left part current-carrying coil 5, left part coil rack 6, left part piston 7, plate spring groups 8 on left part, plate spring groups 9 under left part, tabletting structure 10 on left part, left part lower sheeting structure 11, left part upper support structure 12, left part lower support structure 13, left part displacement transducer iron core 14, left part displacement transducer coil 15, left part displacement transducer supports 16, left part casing 17 and right part cylinder liner 1 ', right part permanent magnet 2 ', yoke 3 on right part ', right part lower yoke 4 ', right part current-carrying coil 5 ', right part coil rack 6 ', right part piston 7 ', plate spring groups 8 on right part ', plate spring groups 9 under right part ', tabletting structure 10 on right part ', right part lower sheeting structure 11 ', right part upper support structure 12 ', right part lower support structure 13 ', right part displacement transducer iron core 14 ', right part displacement transducer coil 15 ', right part displacement transducer support 16 ', right part casing 17 ' composition jointly, it is characterized in that, the mechanical vibration that overall structure adopts opposed type to produce to offset left and right two-part, take vertical center line 40 as symmetry axis, all parts of left part and structural configuration and right part corresponding part and structural configuration enantiotropy each other, horizontal axis 50 indications are shown axial direction, share support 0 by left part cylinder 41, right part cylinder 41 ' and shared air outlet hole 42 form, left part cylinder liner 1 interference fit is embedded in the inside of left part cylinder 41, right part cylinder liner 1 ' interference fit be embedded in right part cylinder 41 ' inside, left part permanent magnet 2 is cylinder-like structure, and central position is processed with left part magnet inner via hole 43 vertically, on left part, yoke 3 is cylinder-like structure, and its central position is processed with yoke inner via hole 44 on the left part that diameter is d vertically, and on left part, the external diameter of yoke 3 is than little 2.0～3.0 μ m of the diameter of left part magnet inner via hole 43, left part lower yoke 4 is U-shaped structure, the internal diameter of U-shaped body is than large 2.0～3.0 μ m of the external diameter of left part permanent magnet 2, central position in U-shaped body bottom is processed with left part lower yoke inner via hole 45 vertically, and the diameter of left part lower yoke inner via hole 45 is greater than the external diameter of yoke 3 on left part, left part permanent magnet 2 radially magnetizes to saturated, on left part, yoke 3 inserts left part magnet inner via hole 43 inside afterwards, left part lower yoke 4 wraps up yoke 3 on left part permanent magnet 2 and left part wherein, on left part, yoke left side 18 flushes with left part lower yoke left side 19, and on left part, yoke right side 20, left part permanent magnet right side 22 and left part lower yoke right side 27 threes flush, on left part permanent magnet inner ring surface 21 and left part, yoke outer ring surface 67 is close together, and left part magnet outer surface 68 is close together with left part lower yoke inner ring surface 23, yoke 3, the common left part ring-type air gap 46 that forms of left part lower yoke 4 on left part permanent magnet 2, left part, left part current-carrying coil 5 inserts in left part ring-type air gap 46 with one heart, right part permanent magnet 2 ', yoke 3 on right part ', right part lower yoke 4 ' jointly form right part ring-type air gap 46 ', right part current-carrying coil 5 ' insert with one heart right part ring-type air gap 46 ' in, left part current-carrying coil 5 and right part current-carrying coil 5 ' axial height be h, range when left part piston 7 and right part piston 7 ' work is s, left part lower yoke 4 is δ with the axial thickness of right part lower yoke 4 ' bottom, and meets relation: δ > s+h, to guarantee in whole piston stroke, guarantees that current-carrying coil is within stable magnetic field all the time, upper left supports right end face 24 is supported on left part lower yoke left side 19, and the two is by screw fastening, and ring plain 25 is processed in the left side of left part upper support structure 12, lower-left supports right end face 47 is supported in and shares on support left surface 48, and the two welds together, lower-left carries left leading flank 26 is supported on left part lower yoke right side 27, and the two is by screw fastening, and lower ring plain 28 is processed in the side, lower-left of left part lower support structure 13, on left part, plate spring groups 8 is formed by stacking by some single piece plate spring thin slices, form upper left group outer rim 29 in outer rim, form upper left group inner edge 30 at inner edge, being processed with vertically diameter in center portion is the upper left group spring body center hole 31 of d, wherein upper left group outer rim 29 is positioned on the upper ring plain 25 of left part upper support structure 12, and passes through screw fastening, under left part, plate spring groups 9 is formed by stacking by some single piece plate spring thin slices, form lower-left group outer rim 32 in outer rim, form lower-left group inner edge 33 at inner edge, being processed with vertically diameter in center portion is the lower-left group spring body center hole 34 of d, wherein lower-left group outer rim 32 is positioned on the lower ring plain 28 of left part lower support structure 13, and passes through screw fastening, left part piston 7 is made up of left part piston head 35, left part piston middle transition platform 36 and left part piston rod 37, be processed with the left bar thread section 49 of long 1～3mm at the end of left part piston rod 37, the external diameter of left part piston head 35, than little 10～30 μ m of internal diameter of left part cylinder 41, guarantees that the diameter of left part piston rod 37 is less than d simultaneously, left part piston rod 37 runs through yoke inner via hole 44 on lower-left group spring body center hole 34, left part lower yoke inner via hole 45, left part, upper left group spring body center hole 31 successively, on left part, tabletting structure 10 tightens together upper left group inner edge 30 and left part coil rack 6 with left part piston rod 37, left part lower sheeting structure 11 tightens together lower-left group inner edge 33 with left part piston middle transition platform 36, thereby guarantees on left part current-carrying coil 5, left part coil rack 6 and left part piston 7, left part under plate spring groups 8, left part that plate spring groups 9 is connected to the entirety that can simultaneously move, left part displacement transducer iron core 14 inside are processed with the left iron core thread section 51 matching with left bar thread section 49, and left bar thread section 49 screws in left iron core thread section 51 also fastening, outside left part displacement transducer iron core 14, arrange with left part displacement transducer and support the 16 left part displacement transducer coils 15 that tighten together, left part displacement transducer supports 16 and then be supported on left part upper support structure 12 also and tighten together with it, left part casing 17 is welded and fixed by left part casing exterior edge face 61 and support exterior edge face, lower-left 52, thereby form left part airtight cavity, by left part cylinder liner 1, left part permanent magnet 2, yoke 3 on left part, left part lower yoke 4, left part current-carrying coil 5, left part coil rack 6, left part piston 7, plate spring groups 8 on left part, plate spring groups 9 under left part, tabletting structure 10 on left part, left part lower sheeting structure 11, left part upper support structure 12, left part lower support structure 13, left part displacement transducer iron core 14, left part displacement transducer coil 15, left part displacement transducer supports 16, left part casing 17 all covers in wherein, the all parts of right part and structural configuration are left part corresponding part and the structural configuration enantiotropies about vertical center line 40, right part casing 17 ' by right part casing exterior edge face 61 ' with support exterior edge face, bottom right 52 ' be welded and fixed, form right part airtight cavity, by right part cylinder liner 1 ', right part permanent magnet 2 ', yoke 3 on right part ', right part lower yoke 4 ', right part current-carrying coil 5 ', right part coil rack 6 ', right part piston 7 ', plate spring groups 8 on right part ', plate spring groups 9 under right part ', tabletting structure 10 on right part ', right part lower sheeting structure 11 ', right part upper support structure 12 ', right part lower support structure 13 ', right part displacement transducer iron core 14 ', right part displacement transducer coil 15 ', right part displacement transducer support 16 ', right part casing 17 ' all cover in wherein, thereby form a kind of opposed type moving-coil linear compressor that adopts short coil radial magnetizing.
The manufacture method of the opposed type moving-coil linear compressor below in conjunction with accompanying drawing to invented employing short coil radial magnetizing is described as follows:
Fig. 2 is the section plan of the opposed type moving-coil linear compressor of invented employing short coil radial magnetizing; Take vertical center line 40 as symmetry axis each other all parts of left part of enantiotropy and right part corresponding part need adopt same batch of production part so that the difference between individuality minimize;
Fig. 3 is the three-dimensional cutaway view that shares support 0; Sharing support 0 adopts the titanium alloy material that mechanical strength is high, thermal expansion coefficient is little to make, adopt five-axis machine tool process simultaneously left part cylinder 41 and right part cylinder 41 ', assurance left part cylinder 41 and right part cylinder 41 ' about vertical center line 40 symmetries, and guarantee left part cylinder 41 and right part cylinder 41 ' coaxality be better than 1.0 μ m, guarantee that the endoporus circularity of above-mentioned two cylinders is all better than 0.5 μ m simultaneously; After left part cylinder 41 and right part cylinder 41 ' completion of processing, use same five-axis machine tool to process and share air outlet hole 42, guarantee to share air outlet hole 42 and left part cylinder 41 and right part cylinder 41 ' perpendicularity be all better than 2.0 μ m;
Fig. 4 is the three-dimensional cutaway view (for the left and right parts of enantiotropy each other, generally only provide the detailed maps of left part, and manufacturer's rule together being narrated left part and right part parts in accompanying drawing, lower same) of left part cylinder liner 1; left part cylinder liner 1 and right part cylinder liner 1 ' all adopt hardness is greater than 58 die steel material and uses the method for the silk thread cutting of being careful to be processed into cylindric, guarantee left part cylinder liner 1 and right part cylinder liner 1 ' external diameter respectively than left part cylinder 41 and right part cylinder 41 ' the large 0.5～1.0mm of internal diameter, then adopt interference fit and the mode of expanding with heat and contract with cold be inlaid into respectively left part cylinder 41 and right part cylinder 41 ' in, concrete method for embedding is as follows: it is homogeneous heating 4～6 hours in the heated at constant temperature case of 160 ℃ that shared support 0 entirety is as shown in Figure 3 positioned over to inside temperature, before shared support 0 takes out heated at constant temperature case 5～10 minutes, by left part cylinder liner 1 and right part cylinder liner 1 ' be positioned in liquid nitrogen and soak simultaneously, when shared support 0 takes out from heated at constant temperature case, by left part cylinder liner 1 and right part cylinder liner 1 ' take out from liquid nitrogen, then use mechanical external force by left part cylinder liner 1 and right part cylinder liner 1 ' push respectively left part cylinder 41 and right part cylinder 41 ' inside, thereby guarantee left part cylinder liner 1 and right part cylinder liner 1 ' outer wall respectively with left part cylinder 41 and right part cylinder 41 ' inwall combine closely, then use jig grinding machine to left part cylinder liner 1 and right part cylinder liner 1 ' endoporus carry out fine gtinding, guarantee that its endoporus circularity is all better than 0.5 μ m,
Fig. 5 is the section plan of left part piston 7; Left part piston 7 and right part piston 7 ' all adopt the titanium alloy material that mechanical strength is high, thermal expansion coefficient is little to make, first adopt numerical control machine tool to process blank, then adopt jig grinding machine to carry out fine gtinding, guarantee left part piston head 35 and right part piston head 35 ' circularity be all better than 0.5 μ m, and guarantee the beating lower than 3.0 μ m of left part piston rod 37 and right part piston rod 37 ' vertically, and left part piston rod 37 is better than 1.0 μ m with the perpendicularity of left part piston head 35, right part piston rod 37 ' with right part piston head 35 ' perpendicularity be better than 1.0 μ m; Left part piston rod 37 and right part piston rod 37 ' end use precise numerical control machine process respectively left bar thread section 49 and right bar thread section 49 '; Range when left part piston 7 and right part piston 7 ' work is all designed to s, guarantees that by limit structure stroke accuracy is better than 2.0 μ m;
Fig. 6 is the combination schematic diagram of tabletting structure 10 on plate spring groups 8 and left part on left part, and Fig. 7 is the combination schematic diagram of plate spring groups 9 and left part lower sheeting structure 11 under left part; Tabletting structure 10 on tabletting structure 10, left part lower sheeting structure 11 and right part on left part ', right part lower sheeting structure 11 ' higher by mechanical strength, metallic material that remanent magnetism is lower adopt numerical control machine tool processing and fabricating to form, machining accuracy is all better than 9.0 μ m; Plate spring groups 8 on plate spring groups 9 and right part under plate spring groups 8, left part on left part ', plate spring groups 9 under right part ' by some plate sheet leaf springs stack compositions, the thickness of monolithic thin slice leaf spring and quantity determine by specifically applying needed elastic stiffness, material is beryllium bronze or stainless steel, adopt the method for photoetching accurately to process inner molded line, inner molded line can be spirality, also can be straight-arm shape, that molded line requires is level and smooth, without burr, without knuckle, and exceed 10 by leaf spring vibration tester 8inspection of fatigue more than individual circulation;
The schematic diagram that inner molded line is spiral monolithic thin slice leaf spring as shown in Figure 8, on thin slice, etch spirality molded line 38 with photolithography, thereby self-assembling formation spirality leaf spring arm 39, outside reserves single piece plate spring outer rim 53, and evenly etch somely for the fixing screw hole 54 of screw thereon with photolithography, reserve single piece plate spring inner edge 55 in inner side;
The schematic diagram of the monolithic thin slice leaf spring that inner molded line is straight-arm shape as shown in Figure 9, on thin slice, etch straight-arm template spring arm 56 and movement arm 57 with photolithography, outside reserves single piece plate spring outer rim 58, and evenly etch somely for the fixing screw hole 59 of screw thereon with photolithography, reserve single piece plate spring inner edge 60 in inner side;
Figure 10 and Figure 11 are respectively the section plan of left part upper support structure 12 and left part lower support structure 13; Left part upper support structure 12 and the metallic material that left part lower support structure 13 is higher by mechanical strength, remanent magnetism is lower adopt numerical control machine tool processing and fabricating to form, and machining accuracy is all better than 5.0 μ m; The left side of left part upper support structure 12 is used precise numerical control machine to be processed into ring plain 25; Upper left supports right end face 24 is supported on left part lower yoke left side 19, and the two passes through screw fastening; Lower-left supports right end face 47 is supported in and shares on support left surface 48, the two welds together by electron beam welding technology, lower-left carries left leading flank 26 is supported on left part lower yoke right side 27, the two passes through screw fastening, the side, lower-left of left part lower support structure 13 is used precise numerical control machine to process lower ring plain 28, and the side, upper left of left part lower support structure 13 is used precise numerical control machine to process support exterior edge face, lower-left 52;
Figure 12 be right part lower support structure 13 ' section plan; Right part lower support structure 13 ' higher by mechanical strength, metallic material that remanent magnetism is lower adopt numerical control machine tool processing and fabricating to form, and machining accuracy is better than 5.0 μ m, its side, upper right use precise numerical control machine process support exterior edge face, lower-left 52 ';
Figure 13 is the section plan of left part displacement transducer iron core 14; Left part displacement transducer iron core 14 and right part displacement transducer iron core 14 ' make by pure iron material, inner be processed with respectively with the left iron core thread section 51 of left bar thread section 49 and right bar thread section 49 ' match and right iron core thread section 51 ', left bar thread section 49 and right bar thread section 49 ' screw in respectively left iron core thread section 51 and right iron core thread section 51 ' interior and fastening;
Left part coil rack 6, right part coil rack 6 ', left part displacement transducer supports 16, left part displacement transducer supports 16 ' metallic material higher by mechanical strength, that remanent magnetism is lower and adopts numerical control machine tool processing and fabricating to form, machining accuracy is all better than 9.0 μ m; Left part displacement transducer coil 15 and right part displacement transducer coil 15 ' form by enamel covered wire coiling on corresponding skeleton;
Figure 14 is the section plan of left part permanent magnet 2; Left part permanent magnet 2 and right part permanent magnet 2 ' all adopt the rare earth permanent-magnetic material that magnetic energy product is higher to make, use the mode machine shaping of laser beam machining; Left part permanent magnet 2 and right part permanent magnet 2 ' all use pulsed magnetizer radially to magnetize to saturated;
Figure 15 is the section plan of yoke 3 on left part; Yoke 3 on yoke 3 and right part on left part ' all adopt the pure iron material that permeability is higher, uses precise numerical control machine to process, and machining accuracy is all better than 8.0 μ m;
Figure 16 is the section plan of left part lower yoke 4; Left part lower yoke 4 and right part lower yoke 4 ' all adopt the pure iron material that permeability is higher, use precise numerical control machine to process, the axial thickness of left part lower yoke 4 and right part lower yoke 4 ' bottom is δ, and machining accuracy is all better than 2.0 μ m;
Figure 17 is the schematic diagram of left part current-carrying coil 5; Left part current-carrying coil 5 and right part current-carrying coil 5 ' all adopt enamel covered wire coiling in solid support to form, the motor force that the diameter of enamel covered wire and thickness are provided by needs determines; Left part current-carrying coil 5 and right part current-carrying coil 5 ' axial height be h, when making, guarantee that by machine tool accuracy and technique for coiling the precision of h is better than 2.0 μ m;
Figure 18 is the combined planar sectional view of yoke 3 on left part permanent magnet 2, left part, left part lower yoke 4 and left part current-carrying coil 5; Left part lower yoke 4 wraps up yoke 3 on left part permanent magnet 2 and left part wherein, jointly forms left part ring-type air gap 46, and left part current-carrying coil 5 inserts in left part ring-type air gap 46 with one heart; Left part lower yoke 4 ' by left part permanent magnet 2 ' and left part on yoke 3 ' parcel wherein, jointly form right part ring-type air gap 46 ', right part current-carrying coil 5 ' insert with one heart right part ring-type air gap 46 ' in; Yoke 3 on yoke 3, left part current-carrying coil 5, left part piston 7 and right part on left part ' with right part current-carrying coil 5 ', right part piston 7 ' all need in the time making guarantees to meet the axial thickness of lower yoke bottom separately and is greater than the axial height of current-carrying coil separately and the range sum of piston separately, that is: δ > s+h, to guarantee in whole piston stroke, guarantee that all the time current-carrying coil is within stable magnetic field;
Figure 19 and Figure 20 be respectively left part casing 17 and right part casing 17 ' section plan; Left part casing 17 and right part casing 17 ' high by mechanical strength, compact structure, the metallic material that remanent magnetism is lower use precise numerical control machine processing and fabricating to be shaped; Left part casing exterior edge face 61 is used electron beam technology to weld together with support exterior edge face, lower-left 52, forms left side airtight cavity; Right part casing exterior edge face 61 ' weld together with support exterior edge face, bottom right 52 ' use electron beam technology, form right part airtight cavity, above-mentioned two complete airtight cavities of welding are all filled with to high-purity helium check, and compressive strength all need be higher than 5.0MPa, and helium leak-down rate all need be lower than 3.0 × 10 -8pam 3/ s.
The advantage of this patent is: stable, the reliable and continuous operation of having realized moving-coil linear compressor in the mode of short coil and radial magnetizing, there is compact structure, vibrate outstanding advantages low, that electric efficiency is high, expected life is long, significant to the development of highly reliable, long lifetime, high efficiency linear compressor.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of four kinds of forms of dynamic coil linear motor, and wherein (1) is long loop axial charging form, and (2) are short coil axial charging form, and (3) are long loop radial magnetizing form, and (4) are short coil radial magnetizing form.Wherein 63 is permanent magnet, and 64 is upper yoke, and 65 is lower yoke, and 66 is current-carrying coil, through hole centered by 67;
Fig. 2 is the section plan of the opposed type moving-coil linear compressor of invented employing short coil radial magnetizing, wherein: 0 for sharing support, 1 is left part cylinder liner, 2 is left part permanent magnet, 3 is yoke on left part, 4 is left part lower yoke, 5 is left part current-carrying coil, 6 is left part coil rack, 7 is left part piston, 8 is plate spring groups on left part, 9 is plate spring groups under left part, 10 is tabletting structure on left part, 11 is left part lower sheeting structure, 12 is left part upper support structure, 13 is left part lower support structure, 14 is left part displacement transducer iron core, 15 is left part displacement transducer coil, 16 is the support of left part displacement transducer, 17 is left part casing, 1 ' be right part cylinder liner, 2 ' be right part permanent magnet, 3 ' be yoke on right part, 4 ' be right part lower yoke, 5 ' be right part current-carrying coil, 6 ' be right part coil rack, 7 ' be right part piston, 8 ' be plate spring groups on right part, 9 ' be plate spring groups under right part, 10 ' be tabletting structure on right part, 11 ' be right part lower sheeting structure, 12 ' be right part upper support structure, 13 ' be right part lower support structure, 14 ' be right part displacement transducer iron core, 15 ' be right part displacement transducer coil, 16 ' be the support of right part displacement transducer, 17 ' be right part casing,
Fig. 3 is the three-dimensional cutaway view that shares support 0, and wherein 41 is left part cylinder, 41 ' be right part cylinder, 42 for sharing air outlet hole, and 48 for sharing support left surface;
Fig. 4 is the three-dimensional cutaway view of left part cylinder liner 1;
Fig. 5 is the section plan of left part piston 7, and wherein 35 is left part piston head, and 36 is left part piston middle transition platform, and 37 is left part piston rod, and 49 is left bar thread section;
Fig. 6 is the combination schematic diagram of tabletting structure 10 on plate spring groups 8 and left part on left part, and wherein 29 is upper left group outer rim, and 30 is upper left group inner edge, upper left group spring body center hole 31;
Fig. 7 is the combination schematic diagram of plate spring groups 9 and left part lower sheeting structure 11 under left part, and wherein 32 is lower-left group outer rim, and 33 is lower-left group inner edge, and 34 is lower-left group spring body center hole;
Fig. 8 is that inner molded line is the schematic diagram of spiral monolithic thin slice leaf spring, and wherein 38 is spirality molded line, and 39 is spirality leaf spring arm, and 53 is single piece plate spring outer rim, and 54 is screw hole, and 55 is single piece plate spring inner edge;
Fig. 9 is that inner molded line is the schematic diagram of the monolithic thin slice leaf spring of straight-arm shape, and wherein 56 is straight-arm template spring arm, and 57 is movement arm, and 58 is single piece plate spring outer rim, and 59 is screw hole, and 60 is single piece plate spring inner edge;
Figure 10 is the section plan of left part upper support structure 12, and wherein 24 is upper left supports right end face, and 25 is upper ring plain;
Figure 11 is the section plan of left part lower support structure 13, and wherein 26 is lower-left carries left leading flank, and 28 is lower ring plain, and 47 is lower-left supports right end face, and 52 is support exterior edge face, lower-left;
Figure 12 be right part lower support structure 13 ' section plan, wherein 52 ' be support exterior edge face, bottom right;
Figure 13 is the section plan of left part displacement transducer iron core 14, and wherein 51 is left iron core thread section;
Figure 14 is the section plan of left part permanent magnet 2, and wherein 21 is left part magnet inner ring surface; 22 is left part permanent magnet right side; 43 is left part magnet inner via hole, and 68 is left part magnet outer ring surface;
Figure 15 is the section plan of yoke 3 on left part, and wherein 18 is yoke left side on left part; 20 is yoke right side on left part; 44 is yoke inner via hole on left part, and 67 is yoke outer ring surface on left part;
Figure 16 is the section plan of left part lower yoke 4, and wherein 19 is left part lower yoke left side; 23 is left part lower yoke inner ring surface, and 27 is left part lower yoke right side; 45 is left part lower yoke inner via hole;
Figure 17 is the schematic diagram of left part current-carrying coil 5;
Figure 18 is the combined planar sectional view of yoke 3 on left part permanent magnet 2, left part, left part lower yoke 4 and left part current-carrying coil 5, and wherein 46 is left part ring-type air gap;
Figure 19 is the section plan of left part casing 17, and wherein 61 is left part casing exterior edge face, and 62 is left part engine housing;
Figure 20 be right part casing 17 ' section plan, wherein 61 ' be right part casing exterior edge face, 62 ' be right part engine housing.
Embodiment
Below in conjunction with drawings and Examples, the embodiment of this patent is described in further detail:
The opposed type moving-coil linear compressor of the employing short coil radial magnetizing of inventing is by sharing support 0, left part cylinder liner 1, left part permanent magnet 2, yoke 3 on left part, left part lower yoke 4, left part current-carrying coil 5, left part coil rack 6, left part piston 7, plate spring groups 8 on left part, plate spring groups 9 under left part, tabletting structure 10 on left part, left part lower sheeting structure 11, left part upper support structure 12, left part lower support structure 13, left part displacement transducer iron core 14, left part displacement transducer coil 15, left part displacement transducer supports 16, left part casing 17 and right part cylinder liner 1 ', right part permanent magnet 2 ', yoke 3 on right part ', right part lower yoke 4 ', right part current-carrying coil 5 ', right part coil rack 6 ', right part piston 7 ', plate spring groups 8 on right part ', plate spring groups 9 under right part ', tabletting structure 10 on right part ', right part lower sheeting structure 11 ', right part upper support structure 12 ', right part lower support structure 13 ', right part displacement transducer iron core 14 ', right part displacement transducer coil 15 ', right part displacement transducer support 16 ', right part casing 17 ' composition jointly, it is characterized in that, the mechanical vibration that overall structure adopts opposed type to produce to offset left and right two-part, take vertical center line 40 as symmetry axis, all parts of left part and structural configuration and right part corresponding part and structural configuration enantiotropy each other, horizontal axis 50 indications are shown axial direction, share support 0 by left part cylinder 41, right part cylinder 41 ' and shared air outlet hole 42 form, left part cylinder liner 1 interference fit is embedded in the inside of left part cylinder 41, right part cylinder liner 1 ' interference fit be embedded in right part cylinder 41 ' inside, left part permanent magnet 2 is cylinder-like structure, and central position is processed with left part magnet inner via hole 43 vertically, on left part, yoke 3 is cylinder-like structure, and its central position is processed with yoke inner via hole 44 on the left part that diameter is d vertically, and on left part, the external diameter of yoke 3 is than little 2.0～3.0 μ m of the diameter of left part magnet inner via hole 43, left part lower yoke 4 is U-shaped structure, the internal diameter of U-shaped body is than large 2.0～3.0 μ m of the external diameter of left part permanent magnet 2, central position in U-shaped body bottom is processed with left part lower yoke inner via hole 45 vertically, and the diameter of left part lower yoke inner via hole 45 is greater than the external diameter of yoke 3 on left part, left part permanent magnet 2 radially magnetizes to saturated, on left part, yoke 3 inserts left part magnet inner via hole 43 inside afterwards, left part lower yoke 4 wraps up yoke 3 on left part permanent magnet 2 and left part wherein, on left part, yoke left side 18 flushes with left part lower yoke left side 19, and on left part, yoke right side 20, left part permanent magnet right side 22 and left part lower yoke right side 27 threes flush, on left part permanent magnet inner ring surface 21 and left part, yoke outer ring surface 67 is close together, and left part magnet outer surface 68 is close together with left part lower yoke inner ring surface 23, yoke 3, the common left part ring-type air gap 46 that forms of left part lower yoke 4 on left part permanent magnet 2, left part, left part current-carrying coil 5 inserts in left part ring-type air gap 46 with one heart, right part permanent magnet 2 ', yoke 3 on right part ', right part lower yoke 4 ' jointly form right part ring-type air gap 46 ', right part current-carrying coil 5 ' insert with one heart right part ring-type air gap 46 ' in, left part current-carrying coil 5 and right part current-carrying coil 5 ' axial height be h, range when left part piston 7 and right part piston 7 ' work is s, left part lower yoke 4 is δ with the axial thickness of right part lower yoke 4 ' bottom, and meets relation: δ > s+h, to guarantee in whole piston stroke, guarantees that current-carrying coil is within stable magnetic field all the time, upper left supports right end face 24 is supported on left part lower yoke left side 19, and the two is by screw fastening, and ring plain 25 is processed in the left side of left part upper support structure 12, lower-left supports right end face 47 is supported in and shares on support left surface 48, and the two welds together, lower-left carries left leading flank 26 is supported on left part lower yoke right side 27, and the two is by screw fastening, and lower ring plain 28 is processed in the side, lower-left of left part lower support structure 13, on left part, plate spring groups 8 is formed by stacking by some single piece plate spring thin slices, form upper left group outer rim 29 in outer rim, form upper left group inner edge 30 at inner edge, being processed with vertically diameter in center portion is the upper left group spring body center hole 31 of d, wherein upper left group outer rim 29 is positioned on the upper ring plain 25 of left part upper support structure 12, and passes through screw fastening, under left part, plate spring groups 9 is formed by stacking by some single piece plate spring thin slices, form lower-left group outer rim 32 in outer rim, form lower-left group inner edge 33 at inner edge, being processed with vertically diameter in center portion is the lower-left group spring body center hole 34 of d, wherein lower-left group outer rim 32 is positioned on the lower ring plain 28 of left part lower support structure 13, and passes through screw fastening, left part piston 7 is made up of left part piston head 35, left part piston middle transition platform 36 and left part piston rod 37, be processed with the left bar thread section 49 of long 1～3mm at the end of left part piston rod 37, the external diameter of left part piston head 35, than little 10～30 μ m of internal diameter of left part cylinder 41, guarantees that the diameter of left part piston rod 37 is less than d simultaneously, left part piston rod 37 runs through yoke inner via hole 44 on lower-left group spring body center hole 34, left part lower yoke inner via hole 45, left part, upper left group spring body center hole 31 successively, on left part, tabletting structure 10 tightens together upper left group inner edge 30 and left part coil rack 6 with left part piston rod 37, left part lower sheeting structure 11 tightens together lower-left group inner edge 33 with left part piston middle transition platform 36, thereby guarantees on left part current-carrying coil 5, left part coil rack 6 and left part piston 7, left part under plate spring groups 8, left part that plate spring groups 9 is connected to the entirety that can simultaneously move, left part displacement transducer iron core 14 inside are processed with the left iron core thread section 51 matching with left bar thread section 49, and left bar thread section 49 screws in left iron core thread section 51 also fastening, outside left part displacement transducer iron core 14, arrange with left part displacement transducer and support the 16 left part displacement transducer coils 15 that tighten together, left part displacement transducer supports 16 and then be supported on left part upper support structure 12 also and tighten together with it, left part casing 17 is welded and fixed by left part casing exterior edge face 61 and support exterior edge face, lower-left 52, thereby form left part airtight cavity, by left part cylinder liner 1, left part permanent magnet 2, yoke 3 on left part, left part lower yoke 4, left part current-carrying coil 5, left part coil rack 6, left part piston 7, plate spring groups 8 on left part, plate spring groups 9 under left part, tabletting structure 10 on left part, left part lower sheeting structure 11, left part upper support structure 12, left part lower support structure 13, left part displacement transducer iron core 14, left part displacement transducer coil 15, left part displacement transducer supports 16, left part casing 17 all covers in wherein, the all parts of right part and structural configuration are left part corresponding part and the structural configuration enantiotropies about vertical center line 40, right part casing 17 ' by right part casing exterior edge face 61 ' with support exterior edge face, bottom right 52 ' be welded and fixed, form right part airtight cavity, by right part cylinder liner 1 ', right part permanent magnet 2 ', yoke 3 on right part ', right part lower yoke 4 ', right part current-carrying coil 5 ', right part coil rack 6 ', right part piston 7 ', plate spring groups 8 on right part ', plate spring groups 9 under right part ', tabletting structure 10 on right part ', right part lower sheeting structure 11 ', right part upper support structure 12 ', right part lower support structure 13 ', right part displacement transducer iron core 14 ', right part displacement transducer coil 15 ', right part displacement transducer support 16 ', right part casing 17 ' all cover in wherein, thereby form a kind of opposed type moving-coil linear compressor that adopts short coil radial magnetizing.
Fig. 2 is the section plan of the opposed type moving-coil linear compressor of invented employing short coil radial magnetizing; Take vertical center line 40 as symmetry axis each other all parts of left part of enantiotropy and right part corresponding part need adopt same batch of production part so that the difference between individuality minimize;
Fig. 3 is the three-dimensional cutaway view that shares support 0; Sharing support 0 adopts the titanium alloy material that mechanical strength is high, thermal expansion coefficient is little to make, adopt five-axis machine tool process simultaneously left part cylinder 41 and right part cylinder 41 ', assurance left part cylinder 41 and right part cylinder 41 ' about vertical center line 40 symmetries, and guarantee left part cylinder 41 and right part cylinder 41 ' coaxality be better than 1.0 μ m, guarantee that the endoporus circularity of above-mentioned two cylinders is all better than 0.5 μ m simultaneously; After left part cylinder 41 and right part cylinder 41 ' completion of processing, use same five-axis machine tool to process and share air outlet hole 42, guarantee to share air outlet hole 42 and left part cylinder 41 and right part cylinder 41 ' perpendicularity be all better than 2.0 μ m;
Fig. 4 is the three-dimensional cutaway view (for the left and right parts of enantiotropy each other, generally only provide the detailed maps of left part, and manufacturer's rule together being narrated left part and right part parts in accompanying drawing, lower same) of left part cylinder liner 1; left part cylinder liner 1 and right part cylinder liner 1 ' all adopt hardness is greater than 58 die steel material and uses the method for the silk thread cutting of being careful to be processed into cylindric, guarantee left part cylinder liner 1 and right part cylinder liner 1 ' external diameter respectively than left part cylinder 41 and right part cylinder 41 ' the large 0.5～1.0mm of internal diameter, then adopt interference fit and the mode of expanding with heat and contract with cold be inlaid into respectively left part cylinder 41 and right part cylinder 41 ' in, concrete method for embedding is as follows: it is homogeneous heating 5 hours in the heated at constant temperature case of 160 ℃ that shared support 0 entirety is as shown in Figure 3 positioned over to inside temperature, take out heated at constant temperature case first 6 minutes at shared support 0, by left part cylinder liner 1 and right part cylinder liner 1 ' be positioned in liquid nitrogen and soak simultaneously, when shared support 0 takes out from heated at constant temperature case, by left part cylinder liner 1 and right part cylinder liner 1 ' take out from liquid nitrogen, then use mechanical external force by left part cylinder liner 1 and right part cylinder liner 1 ' push respectively left part cylinder 41 and right part cylinder 41 ' inside, thereby guarantee left part cylinder liner 1 and right part cylinder liner 1 ' outer wall respectively with left part cylinder 41 and right part cylinder 41 ' inwall combine closely, then use jig grinding machine to left part cylinder liner 1 and right part cylinder liner 1 ' endoporus carry out fine gtinding, guarantee that its endoporus circularity is all better than 0.5 μ m,
Fig. 5 is the section plan of left part piston 7; Left part piston 7 and right part piston 7 ' all adopt the titanium alloy material that mechanical strength is high, thermal expansion coefficient is little to make, first adopt numerical control machine tool to process blank, then adopt jig grinding machine to carry out fine gtinding, guarantee left part piston head 35 and right part piston head 35 ' circularity be all better than 0.5 μ m, and guarantee the beating lower than 3.0 μ m of left part piston rod 37 and right part piston rod 37 ' vertically, and left part piston rod 37 is better than 1.0 μ m with the perpendicularity of left part piston head 35, right part piston rod 37 ' with right part piston head 35 ' perpendicularity be better than 1.0 μ m; Left part piston rod 37 and right part piston rod 37 ' end use precise numerical control machine process respectively left bar thread section 49 and right bar thread section 49 '; Range when left part piston 7 and right part piston 7 ' work is all designed to s, guarantees that by limit structure stroke accuracy is better than 2.0 μ m;
Fig. 6 is the combination schematic diagram of tabletting structure 10 on plate spring groups 8 and left part on left part, and Fig. 7 is the combination schematic diagram of plate spring groups 9 and left part lower sheeting structure 11 under left part; Tabletting structure 10 on tabletting structure 10, left part lower sheeting structure 11 and right part on left part ', right part lower sheeting structure 11 ' higher by mechanical strength, metallic material that remanent magnetism is lower adopt numerical control machine tool processing and fabricating to form, machining accuracy is all better than 9.0 μ m; Plate spring groups 8 on plate spring groups 9 and right part under plate spring groups 8, left part on left part ', plate spring groups 9 under right part ' by some plate sheet leaf springs stack compositions, the thickness of monolithic thin slice leaf spring and quantity determine by specifically applying needed elastic stiffness, material is beryllium bronze or stainless steel, adopt the method for photoetching accurately to process inner molded line, inner molded line can be spirality, also can be straight-arm shape, that molded line requires is level and smooth, without burr, without knuckle, and exceed 10 by leaf spring vibration tester 8inspection of fatigue more than individual circulation;
The schematic diagram that inner molded line is spiral monolithic thin slice leaf spring as shown in Figure 8, on thin slice, etch spirality molded line 38 with photolithography, thereby self-assembling formation spirality leaf spring arm 39, outside reserves single piece plate spring outer rim 53, and evenly etch somely for the fixing screw hole 54 of screw thereon with photolithography, reserve single piece plate spring inner edge 55 in inner side;
The schematic diagram of the monolithic thin slice leaf spring that inner molded line is straight-arm shape as shown in Figure 9, on thin slice, etch straight-arm template spring arm 56 and movement arm 57 with photolithography, outside reserves single piece plate spring outer rim 58, and evenly etch somely for the fixing screw hole 59 of screw thereon with photolithography, reserve single piece plate spring inner edge 60 in inner side;
Figure 10 and Figure 11 are respectively the section plan of left part upper support structure 12 and left part lower support structure 13; Left part upper support structure 12 and the metallic material that left part lower support structure 13 is higher by mechanical strength, remanent magnetism is lower adopt numerical control machine tool processing and fabricating to form, and machining accuracy is all better than 5.0 μ m; The left side of left part upper support structure 12 is used precise numerical control machine to be processed into ring plain 25; Upper left supports right end face 24 is supported on left part lower yoke left side 19, and the two passes through screw fastening; Lower-left supports right end face 47 is supported in and shares on support left surface 48, the two welds together by electron beam welding technology, lower-left carries left leading flank 26 is supported on left part lower yoke right side 27, the two passes through screw fastening, the side, lower-left of left part lower support structure 13 is used precise numerical control machine to process lower ring plain 28, and the side, upper left of left part lower support structure 13 is used precise numerical control machine to process support exterior edge face, lower-left 52;
Figure 12 be right part lower support structure 13 ' section plan; Right part lower support structure 13 ' higher by mechanical strength, metallic material that remanent magnetism is lower adopt numerical control machine tool processing and fabricating to form, and machining accuracy is better than 5.0 μ m, its side, upper right use precise numerical control machine process support exterior edge face, lower-left 52 ';
Figure 13 is the section plan of left part displacement transducer iron core 14; Left part displacement transducer iron core 14 and right part displacement transducer iron core 14 ' make by pure iron material, inner be processed with respectively with the left iron core thread section 51 of left bar thread section 49 and right bar thread section 49 ' match and right iron core thread section 51 ', left bar thread section 49 and right bar thread section 49 ' screw in respectively left iron core thread section 51 and right iron core thread section 51 ' interior and fastening;
Left part coil rack 6, right part coil rack 6 ', left part displacement transducer supports 16, left part displacement transducer supports 16 ' metallic material higher by mechanical strength, that remanent magnetism is lower and adopts numerical control machine tool processing and fabricating to form, machining accuracy is all better than 9.0 μ m; Left part displacement transducer coil 15 and right part displacement transducer coil 15 ' form by enamel covered wire coiling on corresponding skeleton;
Figure 14 is the section plan of left part permanent magnet 2; Left part permanent magnet 2 and right part permanent magnet 2 ' all adopt the rare earth permanent-magnetic material that magnetic energy product is higher to make, use the mode machine shaping of laser beam machining; Left part permanent magnet 2 and right part permanent magnet 2 ' all use pulsed magnetizer radially to magnetize to saturated;
Figure 15 is the section plan of yoke 3 on left part; Yoke 3 on yoke 3 and right part on left part ' all adopt the pure iron material that permeability is higher, uses precise numerical control machine to process, and machining accuracy is all better than 8.0 μ m;
Figure 16 is the section plan of left part lower yoke 4; Left part lower yoke 4 and right part lower yoke 4 ' all adopt the pure iron material that permeability is higher, use precise numerical control machine to process, the axial thickness of left part lower yoke 4 and right part lower yoke 4 ' bottom is δ, and machining accuracy is all better than 2.0 μ m;
Figure 17 is the schematic diagram of left part current-carrying coil 5; Left part current-carrying coil 5 and right part current-carrying coil 5 ' all adopt enamel covered wire coiling in solid support to form, the motor force that the diameter of enamel covered wire and thickness are provided by needs determines; Left part current-carrying coil 5 and right part current-carrying coil 5 ' axial height be h, when making, guarantee that by machine tool accuracy and technique for coiling the precision of h is better than 2.0 μ m;
Figure 18 is the combined planar sectional view of yoke 3 on left part permanent magnet 2, left part, left part lower yoke 4 and left part current-carrying coil 5; Left part lower yoke 4 wraps up yoke 3 on left part permanent magnet 2 and left part wherein, jointly forms left part ring-type air gap 46, and left part current-carrying coil 5 inserts in left part ring-type air gap 46 with one heart; Left part lower yoke 4 ' by left part permanent magnet 2 ' and left part on yoke 3 ' parcel wherein, jointly form right part ring-type air gap 46 ', right part current-carrying coil 5 ' insert with one heart right part ring-type air gap 46 ' in; Yoke 3 on yoke 3, left part current-carrying coil 5, left part piston 7 and right part on left part ' with right part current-carrying coil 5 ', right part piston 7 ' all need in the time making guarantees to meet the axial thickness of lower yoke bottom separately and is greater than the axial height of current-carrying coil separately and the range sum of piston separately, that is: δ > s+h, to guarantee in whole piston stroke, guarantee that all the time current-carrying coil is within stable magnetic field;
Figure 19 and Figure 20 be respectively left part casing 17 and right part casing 17 ' section plan; Left part casing 17 and right part casing 17 ' high by mechanical strength, compact structure, the metallic material that remanent magnetism is lower use precise numerical control machine processing and fabricating to be shaped; Left part casing exterior edge face 61 is used electron beam technology to weld together with support exterior edge face, lower-left 52, forms left side airtight cavity; Right part casing exterior edge face 61 ' weld together with support exterior edge face, bottom right 52 ' use electron beam technology, form right part airtight cavity, above-mentioned two complete airtight cavities of welding are all filled with to high-purity helium check, and compressive strength all need be higher than 5.0MPa, and helium leak-down rate all need be lower than 3.0 × 10 -8pam 3/ s.

Claims (1)

1.一种采用短线圈径向充磁的对置式动圈直线压缩机，由共用机座（0）、左部气缸衬套（1）、左部永磁体（2）、左部上轭铁（3）、左部下轭铁（4）、左部载流线圈（5）、左部线圈骨架（6）、左部活塞（7）、左部上板弹簧组（8）、左部下板弹簧组（9）、左部上压片结构（10）、左部下压片结构（11）、左部上支撑结构（12）、左部下支撑结构（13）、左部位移传感器铁芯（14）、左部位移传感器线圈（15）、左部位移传感器支撑（16）、左部机壳（17）以及右部气缸衬套（1′）、右部永磁体（2′）、右部上轭铁（3′）、右部下轭铁（4′）、右部载流线圈（5′）、右部线圈骨架（6′）、右部活塞（7′）、右部上板弹簧组（8′）、右部下板弹簧组（9′）、右部上压片结构（10′）、右部下压片结构（11′）、右部上支撑结构（12′）、右部下支撑结构（13′）、右部位移传感器铁芯（14′）、右部位移传感器线圈（15′）、右部位移传感器支撑（16′）和右部机壳（17′）组成，其特征在于，整体结构采用对置式以抵消左右两部分产生的机械振动，即以垂直中心线（40）为对称轴，左部所有部件及结构布置与右部相应部件及结构布置互为镜像体；水平轴线（50）所指示为轴向方向；共用机座（0）由左部气缸（41）、右部气缸（41′）以及共用出气孔（42）组成；左部气缸衬套（1）过盈配合镶嵌于左部气缸（41）的内部，右部气缸衬套（1′）过盈配合镶嵌于右部气缸（41′）的内部；左部永磁体（2）为圆筒状结构，中心位置沿轴向加工有左部磁体内通孔（43）；左部上轭铁（3）为圆筒状结构，其中心位置沿轴向加工有直径为d的左部上轭铁内通孔（44），左部上轭铁（3）的外径比左部磁体内通孔（43）的直径小2.0～3.0μm；左部下轭铁（4）为U型结构，U形体的内径比左部永磁体（2）的外径大2.0～3.0μm，在U形体底部的中心位置沿轴向加工有左部下轭铁内通孔（45），左部下轭铁内通孔（45）的直径大于左部上轭铁（3）的外径；左部永磁体（2）沿径向充磁至饱和，之后左部上轭铁（3）插入左部磁体内通孔（43）内部，左部下轭铁（4）将左部永磁体（2）及左部上轭铁（3）包裹其中，左部上轭铁左端面（18）与左部下轭铁左端面（19）齐平，左部上轭铁右端面（20）、左部永磁体右端面（22）以及左部下轭铁右端面（27）三者齐平；左部永磁体内环面（21）与左部上轭铁外环面（67）紧贴在一起，左部磁体环表面（68）与左部下轭铁内环面（23）紧贴在一起；左部永磁体（2）、左部上轭铁（3）、左部下轭铁（4）共同形成左部环状气隙（46），左部载流线圈（5）同心地插入左部环状气隙（46）内，右部永磁体（2′）、右部上轭铁（3′）、右部下轭铁（4′）共同形成右部环状气隙（46′），右部载流线圈（5′）同心地插入右部环状气隙（46′）内；左部载流线圈（5）与右部载流线圈（5′）的轴向高度均为h；左部活塞（7）与右部活塞（7′）工作时的最大行程均为s；左部下轭铁（4）与右部下轭铁（4′）底部的轴向厚度均为δ,并满足关系：δ＞s＋h，以保证在整个活塞行程中，始终确保载流线圈处于稳定的磁场之内；左上支撑右端面（24）支撑于左部下轭铁左端面（19）之上，二者通过螺钉紧固，左部上支撑结构（12）的左侧加工成上环状平面（25）；左下支撑右端面（47）支撑于共用机座左侧面（48）之上，二者焊接在一起；左下支撑左前侧面（26）支撑于左部下轭铁右端面（27）之上，二者通过螺钉紧固，左部下支撑结构（13）的左下侧面加工成下环状平面（28）；左部上板弹簧组（8）由若干单片板弹簧薄片叠加而成，在外缘形成左上组外缘（29），在内缘形成左上组内缘（30），在中心部位沿轴向加工有直径为d的左上组簧体中心孔（31），其中左上组外缘（29）放置于左部上支撑结构（12）的上环状平面（25）之上，并通过螺钉紧固；左部下板弹簧组9由若干单片板弹簧薄片叠加而成，在外缘形成左下组外缘（32），在内缘形成左下组内缘（33），在中心部位沿轴向加工有直径为d的左下组簧体中心孔（34），其中左下组外缘（32）放置于左部下支撑结构（13）的下环状平面（28）之上，并通过螺钉紧固；左部活塞（7）由左部活塞头（35）、左部活塞中间过渡台（36）以及左部活塞杆（37）组成，在左部活塞杆（37）的末端加工有长1～3mm的左杆螺纹段（49），左部活塞头（35）的外径较之左部气缸（41）的内径小10～30μm，同时保证左部活塞杆（37）的直径小于d；左部活塞杆（37）依次贯穿左下组簧体中心孔（34）、左部下轭铁内通孔（45）、左部上轭铁内通孔（44）、左上组簧体中心孔（31）；左部上压片结构（10）将左上组内缘（30）以及左部线圈骨架（6）与左部活塞杆（37）紧固在一起，左部下压片结构（11）将左下组内缘（33）与左部活塞中间过渡台（36）紧固在一起，从而保证左部载流线圈（5）、左部线圈骨架（6）与左部活塞（7）、左部上板弹簧组（8）、左部下板弹簧组（9）连接为一个可同时运动的整体；左部位移传感器铁芯（14）内部加工有与左杆螺纹段（49）相配合的左铁芯螺纹段（51），左杆螺纹段（49）旋入左铁芯螺纹段（51）内并紧固；在左部位移传感器铁芯（14）之外设置与左部位移传感器支撑（16）紧固在一起的左部位移传感器线圈（15），左部位移传感器支撑（16）进而支撑于左部上支撑结构（12）之上并与之紧固在一起；左部机壳（17）通过左部机壳外端面（61）与左下支撑外端面（52）焊接固定，从而形成左部密闭腔体，将左部气缸衬套（1）、左部永磁体（2）、左部上轭铁（3）、左部下轭铁（4）、左部载流线圈（5）、左部线圈骨架（6）、左部活塞（7）、左部上板弹簧组（8）、左部下板弹簧组（9）、左部上压片结构（10）、左部下压片结构（11）、左部上支撑结构（12）、左部下支撑结构（13）、左部位移传感器铁芯（14）、左部位移传感器线圈（15）、左部位移传感器支撑（16）、左部机壳（17）全部罩于其中；右部所有部件及结构布置是左部相应部件及结构布置关于垂直中心线（40）的镜像体，右部机壳（17′）通过右部机壳外端面（61′）与右下支撑外端面（52′）焊接固定，形成右部密闭腔体，将右部气缸衬套（1′）、右部永磁体（2′）、右部上轭铁（3′）、右部下轭铁（4′）、右部载流线圈（5′）、右部线圈骨架（6′）、右部活塞（7′）、右部上板弹簧组（8′）、右部下板弹簧组（9′）、右部上压片结构（10′）、右部下压片结构（11′）、右部上支撑结构（12′）、右部下支撑结构（13′）、右部位移传感器铁芯（14′）、右部位移传感器线圈（15′）、右部位移传感器支撑（16′）、右部机壳（17′）全部罩于其中，从而形成一种采用短线圈径向充磁的对置式动圈直线压缩机。1. An opposed moving coil linear compressor adopting radial magnetization of short coils, which consists of a common machine base (0), a left cylinder liner (1), a left permanent magnet (2), and a left upper yoke (3), left lower yoke (4), left current-carrying coil (5), left coil bobbin (6), left piston (7), left upper plate spring group (8), left lower plate spring Group (9), left upper pressing structure (10), left lower pressing structure (11), left upper supporting structure (12), left lower supporting structure (13), left displacement sensor core (14) , Left displacement sensor coil (15), left displacement sensor support (16), left casing (17) and right cylinder liner (1′), right permanent magnet (2′), right upper yoke Iron (3′), right lower yoke (4′), right current-carrying coil (5′), right coil bobbin (6′), right piston (7′), right upper plate spring group (8 ′), the right lower plate spring group (9’), the right upper plate structure (10’), the right lower plate structure (11’), the right upper support structure (12’), the right lower support structure (13 '), the right displacement sensor core (14'), the right displacement sensor coil (15'), the right displacement sensor support (16') and the right casing (17'), characterized in that the overall structure The opposite type is used to offset the mechanical vibration generated by the left and right parts, that is, with the vertical centerline (40) as the axis of symmetry, all components and structural arrangements on the left and the corresponding components and structural arrangements on the right are mirror images of each other; the horizontal axis (50) The direction indicated is the axial direction; the common base (0) is composed of the left cylinder (41), the right cylinder (41′) and the common air outlet (42); the left cylinder bushing (1) is embedded in the interference fit Inside the left cylinder (41), the right cylinder bushing (1′) is embedded in the inside of the right cylinder (41′) with an interference fit; the left permanent magnet (2) is a cylindrical structure, and the center position is along the shaft The inner through hole (43) of the left magnet is processed in the direction; the left upper yoke (3) is a cylindrical structure, and the inner through hole (44) of the left upper yoke (3) with a diameter of d is machined in its center along the axial direction , the outer diameter of the left upper yoke (3) is 2.0-3.0 μm smaller than the diameter of the left magnet inner through hole (43); The outer diameter of the magnet (2) is 2.0-3.0 μm larger, and the inner through hole (45) of the left lower yoke is processed axially at the center of the bottom of the U-shaped body, and the diameter of the inner through hole (45) of the left lower yoke is larger than that of the left The outer diameter of the upper yoke (3); the left permanent magnet (2) is radially magnetized to saturation, and then the left upper yoke (3) is inserted into the inner through hole (43) of the left magnet, and the left lower yoke The iron (4) wraps the left permanent magnet (2) and the left upper yoke (3), the left end face (18) of the left upper yoke is flush with the left end face (19) of the left lower yoke, and the left upper yoke The right end face of the yoke (20), the right end face of the left permanent magnet (22) and the right end face (27) of the left lower yoke are flush; Iron outer ring surface (67) is close together, left part magnet ring surface (68) and left part lower yoke inner ring face (23) are close together; left part permanent magnet (2), left part upper yoke iron ( 3), the left lower yoke (4) together form the left annular air gap (46), the left current-carrying coil (5) is concentrically inserted into the left annular air gap (46), and the right permanent magnet (2 ′), the right upper yoke (3′), and the right lower yoke (4′) together form the right annular air gap (46′), and the right current-carrying coil (5′) is concentrically inserted into the right annular Inside the air gap (46'); the axial heights of the left current-carrying coil (5) and the right current-carrying coil (5') are both h; when the left piston (7) and the right piston (7') are working The maximum stroke is s; the axial thickness of the bottom of the left lower yoke (4) and the right lower yoke (4′) are both δ, and satisfy the relationship: δ>s+h, to ensure that in the entire piston stroke, always ensure The current-carrying coil is in a stable magnetic field; the upper left support and the right end surface (24) are supported on the left end surface (19) of the left lower yoke iron, the two are fastened by screws, and the left side of the left upper support structure (12) is processed Form an upper annular plane (25); the lower left support right end face (47) is supported on the left side of the common base (48), and the two are welded together; the left lower support left front side (26) is supported on the right end of the left lower yoke On the surface (27), the two are fastened by screws, and the left lower side of the left lower support structure (13) is processed into a lower annular plane (28); the left upper leaf spring group (8) is composed of several single leaf spring sheets superimposed, forming the upper left group outer edge (29) on the outer edge, forming the left upper group inner edge (30) on the inner edge, and processing the left upper group spring body center hole (31) with a diameter d along the axial direction at the central part, wherein The outer edge (29) of the upper left group is placed on the upper annular plane (25) of the upper support structure (12) on the left, and is fastened by screws; the lower leaf spring group 9 on the left is formed by stacking several single leaf spring sheets , the outer edge of the left lower group (32) is formed on the outer edge, the inner edge of the left lower group (33) is formed on the inner edge, and the central hole (34) of the left lower group spring body with a diameter of d is machined in the central part along the axial direction, wherein the left lower group outer The edge (32) is placed on the lower annular plane (28) of the left lower support structure (13), and is fastened by screws; the left piston (7) transitions from the left piston head (35) to the middle of the left piston Table (36) and the left piston rod (37), the end of the left piston rod (37) is processed with a left rod thread section (49) with a length of 1-3mm, and the outer diameter of the left piston head (35) is larger The inner diameter of the left cylinder (41) is 10-30 μm smaller, and at the same time ensure that the diameter of the left piston rod (37) is smaller than d; Iron inner through hole (45), left upper yoke inner through hole (44), left upper group spring body center hole (31); The coil bobbin (6) and the left piston rod (37) are fastened together, and the left lower pressing piece structure (11) will Edge (33) is fastened together with the middle transition table (36) of the left piston, so as to ensure that the left current-carrying coil (5), the left coil frame (6) and the left piston (7) The group (8) and the left lower plate spring group (9) are connected as a whole that can move at the same time; the left core of the displacement sensor (14) is internally processed with a left core thread section that matches the left rod thread section (49) (51), the threaded section of the left rod (49) is screwed into the threaded section of the left core (51) and fastened; it is set outside the left displacement sensor core (14) and fastened with the left displacement sensor support (16) The left displacement sensor coil (15) together, the left displacement sensor support (16) is then supported on the left upper support structure (12) and fastened together with it; the left casing (17) passes through the left The outer end surface (61) of the upper casing and the outer end surface (52) of the lower left support are welded and fixed to form a left airtight cavity, and the left cylinder liner (1), the left permanent magnet (2), and the left upper yoke (3), left lower yoke (4), left current-carrying coil (5), left coil bobbin (6), left piston (7), left upper plate spring group (8), left lower plate spring Group (9), left upper pressing structure (10), left lower pressing structure (11), left upper supporting structure (12), left lower supporting structure (13), left displacement sensor core (14) , the left displacement sensor coil (15), the left displacement sensor support (16), and the left casing (17) are all covered in it; all parts and structural arrangements of the right part are the corresponding parts and structural arrangements of the left part with respect to the vertical center line The mirror body of (40), the right casing (17') is fixed by welding the outer end surface (61') of the right casing and the outer end surface (52') of the lower right support to form a right airtight cavity, and the right cylinder Bushing (1'), right permanent magnet (2'), right upper yoke (3'), right lower yoke (4'), right current-carrying coil (5'), right bobbin ( 6'), right piston (7'), right upper leaf spring group (8'), right lower leaf spring group (9'), right upper pressing structure (10'), right lower pressing structure ( 11'), right upper support structure (12'), right lower support structure (13'), right displacement sensor core (14'), right displacement sensor coil (15'), right displacement sensor support ( 16'), and the right casing (17') are all covered in it, thus forming an opposed moving-coil linear compressor with radial magnetization of short coils.
CN201320740948.1U 2013-11-21 2013-11-21 Oppositely-arranged moving coil linear compressor allowing radial magnetizing to be achieved through short coils Expired - Lifetime CN203627132U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103671014A (en) * 2013-11-21 2014-03-26 中国科学院上海技术物理研究所 Oppositely-arranged moving coil linear compressor adopting short-coil radial magnetization and manufacturing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103671014A (en) * 2013-11-21 2014-03-26 中国科学院上海技术物理研究所 Oppositely-arranged moving coil linear compressor adopting short-coil radial magnetization and manufacturing method
CN103671014B (en) * 2013-11-21 2016-01-13 中国科学院上海技术物理研究所 Opposed moving coil linear compressor using short coil radial magnetization and manufacturing method

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