Moving coil type linear opposed oscillation compressor capable of eliminating flying lead fatigueTechnical Field
The invention relates to the technical field of refrigeration compressors, in particular to a moving coil type linear opposed oscillation compressor capable of eliminating flying lead fatigue.
Background
The small low-temperature refrigerator has compact structure, high power density per unit mass, high refrigeration efficiency at low temperature, environment-friendly refrigeration working medium and easy adjustment of refrigeration capacity; when the linear oscillation opposite type compressor is applied to low-temperature refrigeration occasions, two structures of a moving magnetic type and a moving coil type are generally adopted, a moving piston of the moving magnetic type compressor is fixedly connected with a permanent magnet, and the permanent magnet can generate obvious magnetic bias force between the permanent magnet and an inner magnetic pole and between the permanent magnet and an outer magnetic pole in the linear reciprocating oscillation process, so that a machine body of the compressor generates random vibration and noise; in contrast, the moving piston of the moving coil compressor is fixedly connected with the coil, the copper wire can not generate magnetic bias force with magnetic materials due to lower relative magnetic permeability, so that vibration of a compressor body is greatly reduced, the moving coil type linear oscillating compressor is used as a low-temperature refrigerator of a power source, the low-temperature refrigerator has the characteristics of high energy conversion efficiency and reliable operation, compared with the moving coil type linear oscillating compressor, the fixed stationary structure of the permanent magnet eliminates the magnetic bias force under reciprocating oscillation of the piston, and the low-temperature refrigerator has the advantages of low operation noise, low vibration level, long service life and the like, and has wide application in the fields of aerospace, high-temperature superconducting, infrared detection, biological medicine and the like, but the flying wire fatigue of the coil moving in the moving coil compressor and an external stationary binding post can be caused by long-time and high-frequency flying wire swing, so that the flying wire fatigue of the coil in the moving coil compressor is unfavorable for the long-term stable and high-efficiency operation of the compressor is brought about a broken wire risk.
Disclosure of Invention
The invention aims to solve the technical problem of utilizing a reciprocating vibrating leaf spring as a conductive medium between a moving coil and an external binding post so as to solve the problem of flying lead fatigue.
In order to solve the technical problem, the present invention provides a moving coil type linear opposed oscillation compressor for eliminating flying lead fatigue, which is characterized by comprising:
A housing;
The base is arranged in the shell, an integrated common cylinder body which symmetrically extends towards two sides is arranged in the middle of the base, air holes which are communicated with the inside and the outside of the cylinder body are formed in the base, and pistons which are matched with the base and do linear reciprocating motion in the cylinder body are arranged at two ends of the cylinder body;
The linear motors are arranged on the base and correspond to the mounting positions of the pistons one by one, the linear motors comprise rotor assemblies for driving the corresponding pistons to do linear reciprocating motion and stator assemblies arranged on the base, each rotor assembly comprises a coil support and coils arranged on the coil support, the outer ends of the coil supports are coaxially arranged with the outer ends of the corresponding pistons, and the moving coil supports drive the pistons to do linear reciprocating motion;
The elastic conductors are respectively and insulating mounted at two ends of each elastic conductor on the shell and the fixed shaft coaxially fixed with the outer end of the corresponding piston, the elastic conductors connected between the fixed shaft and the shell provide radial support and axial reciprocating restoring force for the corresponding piston, the elastic conductors are used as conductive carriers and are connected in series on a power transmission wire electrically connected between an external binding post and an internal coil, each elastic conductor is respectively and independently used as a conductive carrier of one electrode, the connection positions of the power transmission wires on the elastic conductors are respectively located at the mounting positions of the elastic conductors on the shell and the fixed shaft, the power transmission wires do not swing along with the moving coil, the binding post is arranged on an end cover connected with the corresponding end of the shell, and the binding post is electrically connected with an external power supply.
Preferably, the base comprises a cylindrical connector, the two ends of the connector are coaxially matched and fixed with the shell, the cylinder body is cylindrical and coaxially arranged in the middle of the connector, a plurality of supports uniformly distributed along the circumferential direction are fixedly connected between the connector and the radial direction of the cylinder body, the air holes are communicated between the inside of the cylinder body and the outside of the connector, and the air holes penetrate through the connector and the inside of one of the supports along the radial direction of the cylinder body.
Preferably, the stator assembly comprises inner magnetic poles, outer magnetic poles and permanent magnets which are cylindrical, wherein the inner magnetic poles and the outer magnetic poles are coaxially arranged and are fixedly connected with a plurality of positioning bodies in the radial direction between the two end faces in the same direction, the inner magnetic poles are coaxially sleeved on the outer circumferential face of the cylinder body, the outer magnetic poles are coaxially sleeved on the inner circumferential face of the corresponding shell, the two end faces of the outer magnetic poles are respectively and axially positioned and supported on supporting bodies of the base and positioning steps arranged on the inner circumferential face of the corresponding shell, the positioning bodies are matched and clamped into hollowed-out spaces between the two adjacent supporting bodies, the permanent magnets are coaxially bonded on the outer circumferential face of the permanent magnet support, a circular space for the coils to axially reciprocate is formed between the outer circumferential face of the permanent magnets and the inner circumferential face of the outer magnetic poles, the coil support is cylindrical, the inner end of the coil support is coaxially sleeved outside the permanent magnets, the coil is coaxially arranged on the outer circumferential face of the coil support and is positioned in the circular space, the outer end of the coil support is provided with a connecting end plate integrally formed with the coil support, and the end plate is coaxially connected with the outer end plate of the coil support and is fixedly connected with the outer end plate of the cylinder body.
Preferably, the coil is of a cylindrical structure formed by winding a plurality of turns of enamelled copper wires, two rings of annular positioning rings extending outwards along the radial direction are arranged on the outer circumferential surface of the coil support, and the coil is axially positioned between the two positioning rings.
Preferably, the number of the elastic conductors is two, and the elastic conductors are respectively an anode elastic conductor and a cathode elastic conductor, the anode elastic conductor and the cathode elastic conductor are disc-shaped plate springs, the molded lines of the plate springs are a plurality of hollow cantilevers with circular involute shapes, and the hollow cantilevers are eccentrically and uniformly distributed with each other.
Preferably, the positive electrode elastic conductor and the negative electrode elastic conductor are coaxially arranged with the fixed shaft, the edge of each elastic conductor is clamped between two adjacent insulating outer compression rings, all the insulating outer compression rings are sequentially axially stacked and compressed on a fixed table arranged on the inner circumferential surface of the shell, the centers of the positive electrode elastic conductor and the negative electrode elastic conductor are coaxially sleeved with a through hole outside the fixed shaft, the center of each elastic conductor is clamped between two adjacent insulating inner compression rings, and all the insulating inner compression rings are sequentially coaxially sleeved on the fixed shaft and axially compressed.
Preferably, the power transmission wire comprises a first positive electrode wire, a second positive electrode wire, a first negative electrode wire and a second negative electrode wire, the external binding post comprises a positive electrode binding post and a negative electrode binding post, the first positive electrode wire which is electrically connected with the positive electrode of the coil is connected to the position of the positive electrode elastic conductor, which is close to the insulating inner compression ring, and the second positive electrode wire which is electrically connected with the positive electrode binding post is connected to the edge of the positive electrode elastic conductor; the electric cable comprises an insulating inner compression ring, a first negative electrode lead electrically connected with a coil negative electrode is connected to the position, close to the insulating inner compression ring, of a negative electrode elastic conductor, a second negative electrode lead electrically connected with an external negative electrode binding post is connected to the edge of the negative electrode elastic conductor, the positive electrode binding post and the negative electrode binding post are fixedly connected to an insulator formed by sintering glass beads, the insulator is embedded in the end cover, one end of the positive electrode binding post extends inwards of the end cover and is electrically connected with the second positive electrode lead, the other end of the positive electrode binding post extends outwards of the end cover and is electrically connected with the positive electrode of a cable fork, one end of the negative electrode binding post extends inwards of the end cover and is electrically connected with the second negative electrode lead, the other end of the negative electrode binding post extends outwards of the end cover and is electrically connected with the negative electrode of the cable fork, a protective cover is further arranged at the outer end of the end cover, and the cable fork radially extends out of the protective cover.
Preferably, a plurality of additional elastic supporting bodies which are identical to the elastic conductor in structure are further connected between the fixed shaft and the shell, each additional elastic supporting body is coaxially arranged with the fixed shaft, the edge of each additional elastic supporting body is clamped between two adjacent common outer pressing rings, all the common outer pressing rings are sequentially and axially stacked and pressed on a fixed table which is fixedly arranged on the inner circumferential surface of the shell, the center of each additional elastic supporting body is provided with a through hole coaxially sleeved outside the fixed shaft, the center of each additional elastic supporting body is clamped between two adjacent common inner pressing rings, and all the common inner pressing rings are sequentially and coaxially sleeved on the fixed shaft and axially pressed.
Preferably, the common outer compression ring and the insulation outer compression ring are compressed and fixed through insulation long bolts which axially penetrate through all compression rings and are screwed on the fixed table, through holes for the insulation long bolts to penetrate through are formed in the edges of the elastic conductor and the additional elastic support body, and the common inner compression ring and the insulation inner compression ring are axially compressed at the end part of the cylinder body through compression nuts which are connected with the free ends of the fixing shafts in a threaded mode.
Preferably, the center of ordinary interior clamping ring is all coaxial suit on crossing the line sleeve, should cross the coaxial suit of line sleeve and just be located between insulating interior clamping ring and the cylinder body in the outside of fixed axle, cross and be equipped with coaxial suit between line sleeve and the cylinder body and pass the outside first thrust bearing of fixed axle, be equipped with coaxial suit between the insulating interior clamping ring of gland nut and outermost end and pass the outside second thrust bearing of fixed axle, through gland nut with second thrust bearing, insulating interior clamping ring, ordinary interior clamping ring, cross line sleeve and first thrust bearing axial compaction in proper order in the tip of cylinder body, just first thrust bearing, insulating interior clamping ring, ordinary interior clamping ring, cross line sleeve and second thrust bearing and all with fixed axle clearance fit, cross the line passageway that is equipped with many correspondence intercommunication in order to supply the wire to pass between insulating interior clamping ring and insulating interior clamping ring, first positive electrode wire from the wire draw-out of coil is through first wire breach on the gland, setting up on the connecting end plate surface and first wire casing and wherein wire casing and wherein the wire casing that is arranged in proper order and the wire casing that is corresponding to the wire casing and the electric connection is passed out of a wire casing and the electric connection in proper order from the electric connection of a pair of wire casing and wire casing, and the electric connection wire casing and wire casing are all passed on the electric connection position.
The invention has the beneficial effects that:
① The invention sets a wire passing gap and a wire passing groove for the wire to pass through on the coil bracket fixedly connected with the moving coil, sequentially leads the wire to pass through the wire passing gap, the wire passing groove, the wire passing sleeve and the wire passing channel arranged in the insulating internal pressure ring, and electrically connects the ends of the positive and negative wires with the positions, close to the insulating internal pressure ring, on the two elastic conductors respectively, and the wire can synchronously move along with the coil and the piston and is relatively static; the fixed outer edges of the two elastic conductors are electrically connected with the binding posts on the end cover of the shell through wires, and the wires are static, so that each wire does not swing relatively back and forth along with the coil or the piston in the process that the coil drives the piston to do back and forth movement.
② According to the invention, the thrust bearing is arranged on the fixed shaft at the end part of the piston, all parts on the fixed shaft are arranged on the fixed shaft through clearance fit, when the free end of the fixed shaft axially compresses all the parts through the compression nut in threaded connection, the fixed shaft is allowed to rotate under the condition that all the parts are axially compressed on the piston shaft, so that the torque at the shaft hole in the elastic conductor is greatly reduced, and therefore, when a rotor component of the linear motor is twisted due to the non-uniform magnetization of the permanent magnet, the elastic conductor cannot be twisted together to deform or even break the molded line of the elastic conductor, the risk of breakage of the molded line of the elastic conductor caused by the torsional deformation is reduced, and the reliability of safe operation of the compressor is improved.
③ The invention takes the inner magnetic pole and the outer magnetic pole of the magnetic circuit as an integral structure, and embeds and assembles with the middle base, thereby improving the rigidity of the integral structure of the stator assembly of the linear motor, reducing the complexity of the assembly process and facilitating the construction and the daily maintenance.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is an enlarged schematic view of the upper half of FIG. 2;
FIG. 4 is an enlarged schematic view of B in FIG. 3;
FIG. 5 is an enlarged schematic view of C in FIG. 3;
FIG. 6 is a cross-sectional view of the elastic electrical conductor and the additional elastic support mounted to the housing;
FIG. 7 is a top view of the inner and outer poles mounted on the base;
FIG. 8 is a cross-sectional view in the direction D-O-D of FIG. 7;
FIG. 9 is a schematic perspective view of a base;
FIG. 10 is a schematic perspective view of an inner pole and an outer pole;
FIG. 11 is a schematic diagram showing a perspective structure of the inner and outer poles;
FIG. 12 is a schematic perspective view of a coil mounted on a coil support;
fig. 13 is a schematic perspective view of a coil bracket;
FIG. 14 is a schematic perspective view of a positive electrode elastic conductor;
FIG. 15 is a front cross-sectional view of the wire passing sleeve;
FIG. 16 is a schematic perspective view of a cable fork mounted to an end cap via an insulator;
The reference numerals in the figures illustrate: 11. a housing; 12. positioning the step; 13. a fixed table; 14. a connecting body; 15. a support body; 16. a cylinder; 17. air holes; 18. a piston; 19. a fixed shaft; 20. a coil support; 21. a positioning ring; 22. a first wire passing notch; 23. a second wire passing notch; 24. a first wire passing groove; 25. a second wire passing groove; 26. a wire pressing block; 27. a coil; 28. a positive electrode elastic conductor; 281. a through hole for the insulation long screw to pass through; 282. a through hole for the fixed shaft to pass through; 29. a negative electrode elastic conductor; 30. a first positive electrode lead; 31. a second positive electrode lead; 32. a first negative electrode lead; 33. a second negative electrode lead; 34. an end cap; 35. an insulator; 36. a positive terminal; 37. a negative electrode binding post; 38. a cable fork; 39. a protective cover; 40. an inner magnetic pole; 41. an outer magnetic pole; 42. a permanent magnet; 43. a positioning body; 44. a permanent magnet holder; 45. connecting end plates; 46. an insulating outer pressure ring; 47. an insulating inner pressure ring; 48. attaching an elastic support body; 49. a common outer pressure ring; 50. a common inner compression ring; 51. an insulated long bolt; 52. a compression nut; 53. a wire passing sleeve; 54. a first thrust bearing; 55. a second thrust bearing; 56. a wire passing channel; 57. and positioning the tube.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Referring to fig. 1-6, an embodiment of a moving coil type linear opposed oscillating compressor for eliminating flying lead fatigue according to the present invention;
The moving coil type linear opposed oscillation compressor for eliminating flying line fatigue comprises a shell 11 and a base, wherein the base is arranged in the shell 11, an integrated common cylinder 16 which symmetrically extends towards two sides is arranged in the middle of the base, an air hole 17 which is communicated with the inside and the outside of the cylinder 16 is arranged on the base, the air hole 17 is used for outputting alternating pressure waves in the cylinder 16, pistons 18 which are matched with the air hole and do linear reciprocating motion in the two ends of the cylinder 16 are arranged at the two ends of the cylinder 16, and the two pistons 18 do reciprocating motion in the cylinder 16 generate periodic alternating pressure waves;
the number of the linear motors is the same as that of the pistons 18, the linear motors are arranged on the base and correspond to the installation positions of the pistons 18 one by one, the linear motors comprise rotor assemblies for driving the corresponding pistons 18 to do linear reciprocating motion and stator assemblies arranged on the base, the rotor assemblies comprise coil supports 20 and coils 27 arranged on the coil supports 20, the outer ends of the coil supports 20 are coaxially arranged with the outer ends of the corresponding pistons 18, and the moving coil supports 20 drive the pistons 18 to do linear reciprocating motion;
The elastic conductors are respectively and insulating installed on the shell 11 and the fixed shaft 19 coaxially fixed with the outer end of the corresponding piston 18, the elastic conductors connected between the fixed shaft 19 and the shell 11 provide radial support and restoring force for the corresponding piston 18, the elastic conductors are used as conductive carriers and are connected in series on conductive wires electrically connected between an external binding post and an internal coil 27, each elastic conductor is respectively and independently used as a conductive carrier of one electrode, the connection positions of the conductive wires on the elastic conductors are respectively located on the installation positions of the elastic conductors on the shell 11 and the fixed shaft 19, the conductive wires do not swing along with the moving coil 27, and in the process that the coil 27 drives the piston 18 to do reciprocating motion, the conductive wires do not do relative reciprocating motion along with the coil 27 or the piston 18, so that the reciprocating motion of the conventional flying wire structure is converted into reciprocating deformation motion of the elastic conductors, the broken wire risk caused by the fatigue of the flying wire is greatly reduced, the conductive wires are arranged on the end cover 34 connected with the corresponding end part of the shell 11, and are electrically connected with an external power supply, and the electric motor is in a corresponding linear power supply.
Referring to fig. 7-11, the base includes a cylindrical connecting body 14, two ends of the connecting body 14 are coaxially and fixedly matched with the housing 11, the cylinder 16 is cylindrical and coaxially disposed in the middle of the connecting body 14, a plurality of supporting bodies 15 uniformly distributed along the circumferential direction are fixedly connected between the connecting body 14 and the radial direction of the cylinder 16, the air hole 17 is communicated between the inside of the cylinder 16 and the outside of the connecting body 14, and the air hole 17 penetrates through the connecting body 14 and the inside of one of the supporting bodies 15 along the radial direction of the cylinder 16.
Referring to fig. 2-3, the stator assembly includes a cylindrical inner magnetic pole 40, an outer magnetic pole 41 and a permanent magnet 42, wherein the inner magnetic pole 40 and the outer magnetic pole 41 are coaxially arranged and are fixedly connected with a plurality of positioning bodies 43 in radial direction between two end surfaces in the same direction, the inner magnetic pole 40 is coaxially sleeved on the outer circumferential surface of the cylinder 16, the outer magnetic pole 41 is coaxially sleeved on the inner circumferential surface of the corresponding shell 11, two end surfaces of the outer magnetic pole 41 are respectively axially positioned and supported on the supporting body 15 of the base and the positioning step 12 arranged on the inner circumferential surface of the corresponding shell 11, the positioning bodies 43 are matched and clamped in a hollowed-out space between two adjacent supporting bodies 15, so as to position the inner magnetic pole and the outer magnetic pole 4, the positioning is stable and accurate, the inner magnetic pole and the outer magnetic pole of the magnetic circuit are used as an integral structure and are embedded and assembled with the middle base, the rigidity of the whole structure of the stator assembly of the linear motor is improved, the complexity of the assembly process is reduced, the construction and the daily maintenance are convenient, the permanent magnet 42 is coaxially adhered to the outer circumferential surface of the permanent magnet support 44, the permanent magnet support 44 is coaxially adhered to the outer circumferential surface of the inner magnetic pole 40, a circular space for the axial reciprocating motion of the coil 27 is arranged between the outer circumferential surface of the permanent magnet 42 and the inner circumferential surface of the outer magnetic pole 41, the coil support 20 is cylindrical, the inner end of the coil support 20 is coaxially sleeved outside the permanent magnet 42, the coil 27 is coaxially adhered to the outer circumferential surface of the coil support 20 and is positioned in the circular space, the outer end of the coil support 20 is provided with a connecting end plate 45 integrally formed with the coil support 20, the connecting end plate 45 is fixed with the outer end part of the cylinder 16, the coil support 20 is coaxial with the cylinder 16, the coil 27 bears a force to do linear reciprocating motion in a magnetic field, and then the coil bracket 20 drives the piston 18 to do linear reciprocating motion, thus completing the output of alternating pressure waves.
Referring to fig. 12-13, the coil 27 is a cylindrical structure formed by winding a plurality of turns of enamelled copper wires, two annular positioning rings 21 extending radially outwards are arranged on the outer circumferential surface of the coil support 20, and the coil 27 is axially positioned between the two positioning rings 21.
Referring to fig. 14, the number of the elastic conductors is two, and the elastic conductors are respectively a positive electrode elastic conductor 28 and a negative electrode elastic conductor 29, the positive electrode elastic conductor 28 and the negative electrode elastic conductor 29 are disc-shaped plate springs, the molded lines of the plate springs are a plurality of hollow cantilevers with circular involute shapes, the hollow cantilevers are eccentrically and uniformly distributed with each other, and the plate springs have small resistance, high efficiency and long service life.
Referring to fig. 2-6, the positive electrode elastic conductor 28 and the negative electrode elastic conductor 29 are coaxially arranged with the fixed shaft 19, the edge of each elastic conductor is clamped between two adjacent insulating outer compression rings 46, all the insulating outer compression rings 46 are sequentially axially stacked and pressed and fixed on a fixed table 13 arranged on the inner circumferential surface of the shell 11, the centers of the positive electrode elastic conductor 28 and the negative electrode elastic conductor 29 are respectively provided with a through hole 282 coaxially sleeved outside the fixed shaft 19, the center of each elastic conductor is clamped between two adjacent insulating inner compression rings 47, and all the insulating inner compression rings 47 are sequentially coaxially sleeved on the fixed shaft 19 and axially pressed.
Referring to fig. 2-6, as shown in fig. 16, the power transmission wire includes a first positive electrode wire 30, a second positive electrode wire 31, a first negative electrode wire 32 and a second negative electrode wire 33, the external terminal includes a positive electrode terminal 36 and a negative electrode terminal 37, the positive electrode elastic conductor 28 is connected to a position close to the insulation inner pressure ring 47 with the first positive electrode wire 30 electrically connected to the positive electrode of the coil 27, and the edge of the positive electrode elastic conductor 28 is connected to the second positive electrode wire 31 electrically connected to the positive electrode terminal 36; the position of the negative electrode elastic conductor 29, which is close to the insulation inner pressure ring 47, is connected with a first negative electrode lead 32 electrically connected with the negative electrode of the coil 27, the edge of the negative electrode elastic conductor 29 is connected with a second negative electrode lead 33 electrically connected with an external negative electrode binding post 37, the positive electrode binding post 36 and the negative electrode binding post 37 are fixedly connected on an insulator 35 formed by sintering glass beads, the insulator 35 is embedded on the end cover 34, one end of the positive electrode binding post 36 extends into the end cover 34 and is electrically connected with the second positive electrode lead 31, the other end of the positive electrode binding post 36 extends out of the end cover 34 and is electrically connected with the positive electrode of the cable fork 38, one end of the negative electrode binding post 37 extends out of the end cover 34 and is electrically connected with the second negative electrode lead 33, the other end of the negative electrode binding post 37 extends out of the end cover 34 and is electrically connected with the negative electrode of the cable fork 38, a protective cover 39 is further arranged at the outer end of the end cover 34, and the cable fork 38 radially extends out of the protective cover 39.
Referring to fig. 2-6, a plurality of additional elastic supporting bodies 48 with the same structure as the elastic electric conductor are further connected between the fixed shaft 19 and the shell 11, the situation that the axial and radial bearing strength of the elastic electric conductor to the piston 18 is insufficient is made up through the additional elastic supporting bodies 48, each additional elastic supporting body 48 is coaxially arranged with the fixed shaft 19, the edge of each additional elastic supporting body 48 is clamped between two adjacent common outer pressing rings 49, all the common outer pressing rings 49 are sequentially and axially stacked and pressed on the fixed table 13 arranged on the inner circumferential surface of the shell 11, through holes coaxially sleeved outside the fixed shaft 19 are formed in the center of each additional elastic supporting body 48, the center of each additional elastic supporting body 48 is clamped between two adjacent common inner pressing rings 50, and all the common inner pressing rings 50 are sequentially and coaxially sleeved on the fixed shaft 19 and axially pressed.
Referring to fig. 4,6 and 14, the common outer pressure ring 49 and the insulating outer pressure ring 46 are fixed by an insulating long bolt 51 penetrating through all pressure rings axially and being screwed on the fixed table 13, and the edges of the elastic conductor and the additional elastic support 48 are provided with a through hole 281 for the insulating long bolt 51 to penetrate, and the common inner pressure ring 50 and the insulating inner pressure ring 47 are pressed on the end of the cylinder 16 axially by a pressing nut 52 screwed on the free end of the fixed shaft 19.
Referring to fig. 2-4 and 15, the center of the common inner pressure ring 50 is coaxially sleeved on the wire passing sleeve 53, the wire passing sleeve 53 is coaxially sleeved outside the fixed shaft 19 and is positioned between the insulating inner pressure ring 47 and the cylinder 16, a first thrust bearing 54 coaxially sleeved outside the fixed shaft 19 is arranged between the wire passing sleeve 53 and the cylinder 16, a second thrust bearing 55 coaxially sleeved outside the fixed shaft 19 is arranged between the compression nut 52 and the insulating inner pressure ring 47 at the outermost end, the second thrust bearing 55, the insulating inner pressure ring 47, the common inner pressure ring 50, the wire passing sleeve 53 and the first thrust bearing 54 are sequentially axially compressed on the end of the cylinder 16 through the compression nut 52, and the first thrust bearing 54, the insulating inner pressure ring 47, the common inner pressure ring 50, the wire passing sleeve 53 and the second thrust bearing 55 are in clearance fit with the fixed shaft 19;
When the free end of the fixed shaft 19 compresses each part in the axial direction through the compression nut 52 in threaded connection, the thrust bearing allows the fixed shaft 19 to rotate under the condition that each part is axially compressed on the shaft of the piston 18, so that the torque at the shaft hole in the elastic conductor is greatly reduced, and therefore when the rotor component of the linear motor is twisted due to the non-uniform magnetization of the permanent magnet 42, the elastic conductor cannot be twisted together so that the molded line of the elastic conductor is deformed or even broken, the risk of breakage of the elastic conductor type line caused by torsional deformation is reduced, and the reliability of safe operation of the compressor is improved.
A plurality of wire passing channels 56 which are correspondingly communicated with each other for the wires to pass through are arranged between the wire passing sleeve 53 and the inner axial direction of the plurality of insulating inner pressure rings 47, positioning pipes 57 used for limiting rotation are inserted between the insulating inner pressure rings 47 and the wire passing sleeve 53, the first positive electrode wires 30 are led out from the positive electrode of the coil 27, sequentially pass through the first wire passing notch 22 on the positioning ring 21, the first wire passing groove 24 arranged on the outer surface of the connecting end plate 45 and one wire passing channel 56, finally pass out of the corresponding wire passing channel 56 and are electrically connected to the corresponding position of the positive electrode elastic conductor 28, the first negative electrode lead 32 is led out from the negative electrode of the coil 27, sequentially passes through the second wire passing notch 23 on the positioning ring 21, the second wire passing groove 25 arranged on the outer surface of the connecting end plate 45 and one wire passing channel 56, finally passes through the corresponding wire passing channel 56 and is electrically connected to the corresponding position of the negative electrode elastic conductor 29, and because the first positive electrode lead 30 and the first negative electrode lead 32 can synchronously move along with the coil 27, the coil bracket 20 and the piston 18, the coil 27 with the relative movement of the first positive electrode lead 30 and the first negative electrode lead 32 is stationary, so that the reciprocating swing of the traditional flying wire structure is converted into the reciprocating deformation movement of the elastic conductor, thereby greatly reducing the wire breakage risk caused by flying wire fatigue, and each wire passing groove is provided with a wire pressing block 26 for pressing the corresponding lead; unnecessary swinging of the wires is reduced under the action of external force through the wire pressing blocks 26, the stability and compactness of the whole structure are improved, and the probability of failure is reduced.
In summary, the coil bracket 20 fixedly connected with the moving coil 27 is provided with a wire passing notch and a wire passing groove for a wire to pass through, the wire is sequentially led to the wire passing notch, the wire passing groove, the wire passing sleeve 53 and the wire passing channel 56 arranged in the insulation inner pressure ring 47, and the ends of the positive and negative wires are respectively and electrically connected with the positions, close to the insulation inner pressure ring 47, on the two elastic conductors, and the wire can synchronously move along with the coil 27 and the piston 18 and is relatively static; the fixed outer edges of the two elastic conductors are electrically connected with the binding posts on the end cover 34 through wires, and the wires are stationary, so that each wire does not swing back and forth along with the coil 27 or the piston 18 in the process that the coil 27 drives the piston 18 to do back and forth movement, and the reciprocating swing of the traditional flying lead structure is converted into the reciprocating deformation movement of the elastic conductors, so that the broken risk caused by flying lead fatigue is greatly reduced.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.