CN116599315A - Motor assembly and linear compressor with same - Google Patents
Motor assembly and linear compressor with same Download PDFInfo
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- CN116599315A CN116599315A CN202310358552.9A CN202310358552A CN116599315A CN 116599315 A CN116599315 A CN 116599315A CN 202310358552 A CN202310358552 A CN 202310358552A CN 116599315 A CN116599315 A CN 116599315A
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- yoke
- motor assembly
- magnetic
- magnetic steel
- piston
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 117
- 239000010959 steel Substances 0.000 claims abstract description 117
- 230000006835 compression Effects 0.000 claims abstract description 30
- 238000007906 compression Methods 0.000 claims abstract description 30
- 238000003466 welding Methods 0.000 claims description 9
- 239000000696 magnetic material Substances 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 abstract description 12
- 238000006073 displacement reaction Methods 0.000 description 12
- 230000004308 accommodation Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The embodiment of the invention provides a motor assembly and a linear compressor with the same, wherein the motor assembly comprises an inner magnetic yoke, an outer magnetic yoke and main magnetic steels, the outer magnetic yoke is arranged at the outer side of the inner magnetic yoke at intervals, a coil and two auxiliary magnetic steels are arranged on the outer magnetic yoke, and the main magnetic steels are arranged between the inner magnetic yoke and the outer magnetic yoke so as to reciprocate in the axial direction of the inner magnetic yoke under the action of electromagnetic force. The linear compressor comprises a cylinder seat, a piston and the motor assembly, wherein the cylinder seat is provided with a compression cavity; the piston is arranged in the compression cavity in a sliding way, and main magnetic steel of the motor assembly is connected with the piston to drive the piston to reciprocate in the compression cavity. According to the motor assembly provided by the embodiment of the invention, the electromagnetic force coefficient can be improved and the axial biasing force can be reduced by arranging the two auxiliary magnetic steels, so that the motor efficiency of the motor assembly provided by the embodiment of the invention is greatly improved. According to the linear compressor provided by the embodiment of the invention, the efficiency of the linear compressor can be greatly improved by arranging the motor assembly with the auxiliary magnetic steel.
Description
Technical Field
The invention belongs to the technical field of refrigeration equipment, and particularly relates to a motor assembly and a linear compressor with the motor assembly.
Background
The linear compressor can be used for pressure wave generators of Stirling refrigerators and pulse tube refrigerators, and a linear motor of the linear compressor can be classified into a moving magnet type, a moving coil type and a moving iron type according to mover types, wherein the former two types are widely applied in engineering. The motor efficiency is an important component of the efficiency of the linear compressor, and the linear compressor efficiency can be improved by improving the efficiency of the linear motor. The ratio of the electromagnetic thrust to the current of the linear motor is called an electromagnetic force coefficient and reflects the output force capacity of the linear motor. The electromagnetic force coefficients of the linear motors in different forms have the phenomenon that the electromagnetic force coefficients attenuate with displacement in different degrees, namely, the more the motor rotor deviates from the initial position, the more the instantaneous electromagnetic force coefficient attenuates.
The related literature (CN 114562439A) discloses a high-pressure ratio linear compressor with a stepped piston, when a coil is connected with alternating current, an alternating magnetic field is generated in a magnetic circuit formed by an outer magnetic yoke, an inner magnetic yoke and an air gap, the magnetic steel is acted by ampere force in the alternating magnetic field, periodic electromagnetic force is generated in the axial direction, and a mover is driven to do linear reciprocating motion
However, the above arrangement has the following drawbacks:
1) When the motor runs, the rotor deviates from the initial position, and the instantaneous electromagnetic force coefficient is greatly attenuated along with the increase of displacement, so that the whole-stroke average electromagnetic force coefficient is reduced, and the motor efficiency and the compressor efficiency are reduced.
2) The magnetic circuit of the conventional linear motor has larger magnetic leakage.
3) The axial electromagnetic bias force of the motor is larger, so that electromagnetic force waveform distortion is caused when sinusoidal voltage is driven, motor loss is increased, and motor efficiency is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
The motor assembly of the embodiment of the invention comprises:
an inner yoke;
the outer magnetic yoke is arranged at intervals on the outer side of the inner magnetic yoke, and a coil and auxiliary magnetic steel are arranged on the outer magnetic yoke;
and the main magnetic steel is arranged between the inner magnetic yoke and the outer magnetic yoke.
By arranging the auxiliary magnetic steel, on one hand, the magnetic circuit magnetic flux leakage of the motor assembly can be reduced, the air gap magnetic induction intensity of the motor assembly is improved, and the electromagnetic force coefficient is greatly improved;
on the other hand, the axial biasing force of the motor component is reduced, so that the electromagnetic force waveform distortion rate during sinusoidal voltage driving is reduced, the loss of the motor component is reduced, and the operation efficiency of the motor component is improved.
Therefore, the motor assembly provided by the embodiment of the invention can improve the electromagnetic force coefficient and reduce the axial biasing force by arranging the two auxiliary magnetic steels, so that the motor efficiency of the motor assembly provided by the embodiment of the invention is greatly improved.
In some embodiments, the auxiliary magnetic steel has two, and the two auxiliary magnetic steels are respectively disposed at both ends of the outer yoke in the axial direction thereof.
In some embodiments, the magnetizing direction of the auxiliary magnetic steel is from one side close to the center of the outer magnetic yoke to one side far from the center of the outer magnetic yoke along the axial direction of the outer magnetic yoke;
the magnetizing direction of the main magnetic steel is from inside to outside along the radial direction of the main magnetic steel.
In some embodiments, the two ends of the outer magnetic yoke along the axial direction of the outer magnetic yoke are respectively provided with grooves, and the two auxiliary magnetic steels are respectively arranged in the grooves at the corresponding ends of the outer magnetic yoke.
In some embodiments, the auxiliary magnetic steel is annular and is coaxially arranged with the outer magnetic yoke.
In some embodiments, two of the auxiliary magnetic steels are symmetrically arranged at both ends of the outer yoke.
In some embodiments, the auxiliary magnetic steel is made of a hard magnetic material.
In some embodiments, the auxiliary magnetic steel and the outer magnetic yoke are fixed by gluing or welding.
The embodiment of the invention also provides a linear compressor, which comprises
A cylinder block having a compression chamber;
the piston is arranged in the compression cavity in a sliding manner;
in the motor assembly of the above embodiment, the main magnetic steel of the motor assembly is connected with the piston to drive the piston to reciprocate in the compression cavity.
In some embodiments, the linear compressor according to the embodiments of the present invention further includes a magnetic steel skeleton, where the magnetic steel skeleton is connected to the piston and the main magnetic steel, respectively, so that the main magnetic steel drives the piston to reciprocate in the compression chamber.
According to the linear compressor provided by the embodiment of the invention, the efficiency of the linear compressor can be greatly improved by arranging the motor assembly with the auxiliary magnetic steel.
Drawings
Fig. 1 is a schematic structural view of a linear compressor according to an embodiment of the present invention;
fig. 2 is a magnetic circuit structure of a linear compressor according to an embodiment of the present invention;
fig. 3 is a graph of electromagnetic force coefficient variation at different mover displacements;
FIG. 4 is a graph of axial bias force variation at different mover displacements;
fig. 5 is a magnetic induction intensity distribution diagram.
Reference numerals:
1. a housing; 101. a first accommodation chamber; 102. a second accommodation chamber;
2. a cylinder block; 201. a cylinder; 2011. a compression chamber; 202. a fixed ring member;
3. a first piston;
4. a second piston;
5. a first motor assembly;
501. a first primary magnetic steel; 502. a first magnetic steel skeleton; 5021. a first skeleton body; 5022. a first connection portion;
503. a first coil;
6. a second motor assembly;
601. a second main magnetic steel; 602. a second magnetic steel skeleton; 6021. a second skeleton body; 6022. a second connecting portion;
603. a second coil;
7. an outer yoke; 701. an annular groove; 8. auxiliary magnetic steel; 9. an elastic member; 901. a first elastic member; 902. a second elastic member; 10. an air path channel; 11. an inner yoke; 12. a leaf spring support; 121. a first leaf spring support; 122. a second leaf spring support.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
An electric motor assembly according to an embodiment of the present invention is described below with reference to fig. 1-5.
The motor component comprises an inner magnetic yoke, an outer magnetic yoke and main magnetic steel. The outer magnetic yoke is arranged at intervals on the outer side of the inner magnetic yoke, the outer magnetic yoke is provided with a coil and auxiliary magnetic steel, the auxiliary magnetic steel plays a role in restraining an inner magnetic circuit of the outer magnetic yoke and reducing magnetic leakage, and the main magnetic steel is arranged between the inner magnetic yoke and the outer magnetic yoke so as to reciprocate in the axial direction of the inner magnetic yoke under the action of electromagnetic force.
It can be understood that the inner yoke and the outer yoke are both circular, i.e. the outer yoke is sleeved outside the inner yoke.
According to the related literature, the motor efficiency (considering copper loss only) can be expressed as formula (1), and it can be seen from formula (1) that the full stroke average electromagnetic force coefficient is improvedThe motor efficiency can be improved.
It is well known to those skilled in the art that decreasing the decay rate of the electromagnetic force coefficient with displacement is an increase in the full stroke average electromagnetic force coefficientIs effective means of (1).
Meanwhile, due to interaction of the magnetic steel, the inner magnetic yoke and the outer magnetic yoke, the non-energized motor can bear certain axial biasing force during different displacements, wherein the axial biasing force is static force with determined direction, and the value of the axial biasing force increases along with the increase of the distance of the displacement from the center of motion. The axial biasing force can cause distortion of electromagnetic force waveforms of the motor, thereby increasing motor loss and further reducing motor efficiency.
From the above, it can be seen that the full stroke average electromagnetic force coefficientAnd axial bias magnetic force are the primary factors affecting motor efficiency.
In this regard, based on electromagnetic simulation design software JMAG, a motor model is built, and electromagnetic force coefficient (motor thrust force under 1A current) and motor axial bias force (interaction force between permanent magnet and soft iron when no current is applied) of motor rotor displacement of 0mm-2.25mm in the related technology are compared and studied.
TABLE 1
As shown in table 1, as the displacement increases, the electromagnetic force coefficient increasing ratio of the optimization scheme gradually increases, and the maximum is 133%.
As shown in fig. 3, the electromagnetic force coefficients of the present invention are all larger than those of the related art.
Therefore, compared with the prior art, the invention improves the electromagnetic force coefficient in displacement, thereby improving the motor efficiency;
TABLE 2
As shown in table 2, the decrease ratio of the axial bias force in the present invention gradually decreases with increasing displacement, the decrease ratio is 191% at the maximum, and the decrease ratio is 67% at the minimum.
As shown in fig. 4, the axial biasing forces of the present invention are smaller than those of the related art.
Therefore, compared with the prior art, the invention reduces the axial biasing force in displacement, thereby improving the motor efficiency;
meanwhile, as shown in fig. 5, the magnetic circuit of the related art has more magnetic leakage (3 irregular black lines exist in (a) of fig. 5) and smaller magnetic induction intensity (maximum 1.8T), so that the electromagnetic force coefficient is lower. The magnetic circuit of the invention has smaller magnetic leakage (1 irregular black line in (b) of fig. 5) and larger magnetic induction intensity (maximum 2.6T), thereby leading to larger electromagnetic force coefficient.
Therefore, compared with the prior art, the invention reduces magnetic leakage of the magnetic circuit and improves the electromagnetic force coefficient.
In conclusion, by arranging the auxiliary magnetic steel, on one hand, the magnetic circuit magnetic flux leakage of the motor assembly can be reduced, the air gap magnetic induction intensity of the motor assembly is improved, and then the electromagnetic force coefficient is greatly improved;
on the other hand, the axial biasing force of the motor component is reduced, so that the electromagnetic force waveform distortion rate during sinusoidal voltage driving is reduced, the loss of the motor component is reduced, and the operation efficiency of the motor component is improved.
Therefore, the motor assembly of the embodiment of the invention can improve the electromagnetic force coefficient and reduce the axial biasing force by arranging the two auxiliary magnetic steels 8, thereby greatly improving the motor efficiency of the motor assembly of the embodiment of the invention.
In some embodiments, the number of the auxiliary magnetic steels is two, and the two auxiliary magnetic steels are respectively arranged at two ends of the outer magnetic yoke along the axial direction of the outer magnetic yoke at intervals so as to better restrict the magnetic circuit in the outer magnetic yoke and reduce magnetic leakage. In other embodiments, the arrangement of the auxiliary magnetic steel is not limited thereto, and only one or more than two auxiliary magnetic steels may be provided, so long as the auxiliary magnetic steel can restrain the magnetic circuit in the outer yoke and reduce magnetic leakage.
Further, as shown in fig. 2, the magnetizing direction of the auxiliary magnetic steel is from the side of the center of the outer yoke to the side far away from the center of the outer yoke, that is, from the right to the left in view of the figure, the magnetizing direction of the right auxiliary magnetic steel is from the left to the right, and the magnetizing direction of the main magnetic steel is from the inside to the outside in the radial direction.
Further, the outer yoke has grooves along its ascending both ends of axial respectively, two supplementary magnet steel is installed respectively in the groove of outer yoke corresponding end, the installation of supplementary magnet steel of being convenient for on the one hand, on the other hand can utilize the groove installation supplementary magnet steel of outer yoke itself, does not need to occupy extra space. Preferably, the auxiliary magnetic steel is annular and is coaxially arranged with the outer magnetic yoke, so that the shape of the auxiliary magnetic steel is matched with that of the outer magnetic yoke. Further preferably, the two auxiliary magnetic steels are symmetrically arranged at two ends of the outer magnetic yoke, so that the symmetry and the overall stability of the motor assembly are ensured.
Further, the auxiliary magnetic steel is made of hard magnetic materials, such as neodymium-iron-boron materials. The auxiliary magnetic steel and the outer magnetic yoke are fixed in an adhesive or welding mode, and can also be fixed in a mechanical mode.
The embodiment of the invention also provides a linear compressor which comprises a cylinder seat, a piston and the motor assembly in the embodiment, wherein the cylinder seat is provided with a compression cavity, the piston is arranged in the compression cavity in a sliding mode, and main magnetic steel of the motor assembly is connected with the piston to drive the piston to reciprocate in the compression cavity.
According to the linear compressor provided by the embodiment of the invention, the efficiency of the linear compressor can be greatly improved by arranging the motor assembly with the auxiliary magnetic steel.
In some embodiments, the linear compressor of the embodiments of the present invention further includes a magnetic steel skeleton, where the magnetic steel skeleton is respectively connected to the piston and the main magnetic steel, so that the main magnetic steel drives the piston to reciprocate in the compression chamber.
Further, the magnetic steel framework comprises a framework body and a connecting part, wherein the framework body is connected with the piston, one end of the connecting part is connected with the framework body, and the other end of the connecting part is connected with the main magnetic steel.
In some embodiments, the linear compressor according to the embodiments of the present invention further includes a housing and an elastic member, wherein the housing is connected to the cylinder block, a part of the elastic member is connected to the housing, and the other part of the elastic member is connected to the magnetic steel skeleton.
Optionally, the elastic member is a leaf spring, wherein a central portion of the leaf spring is connected to the spring skeleton, and an outer side of the leaf spring is connected to the housing. It can be understood that the plate spring and the magnetic steel framework are connected through welding or threads.
Further, a leaf spring support may be arranged between the leaf spring and the housing, for example, a central portion of the leaf spring is connected to the magnetic steel skeleton, and an outer side of the leaf spring is connected to the leaf spring support, and it is understood that the leaf spring and the leaf spring support are connected by welding or screw.
And simultaneously, the end face of the outer magnetic yoke positioned on one side in the axial direction is connected with the plate spring support, and the end face of the outer magnetic yoke positioned on the other side in the axial direction is connected with the cylinder seat.
In some embodiments, the cylinder block further has a gas passage in communication with the compression chamber to allow gas to enter and exit the compression chamber.
A linear compressor according to an embodiment of the present invention will be described with reference to fig. 1.
As shown in fig. 1, the linear compressor of the embodiment of the present invention includes a cylinder block 2, two pistons and two motor assemblies, wherein the cylinder block 2 includes a cylinder 201 and a fixing ring member 202, a compression chamber 2011 is disposed in the cylinder 201 in an extending manner along an axial direction thereof, and the fixing ring member 202 is disposed in an extending manner radially outwardly of the cylinder 201;
alternatively, the cylinder 201 is of unitary construction with the retaining ring 202.
The two pistons are a first piston 3 and a second piston 4 respectively, and the first piston 3 and the second piston 4 are arranged in the compression cavity 2011 in a spaced and opposite way;
the two motor components are respectively arranged on the outer side of the cylinder 201 and are positioned on the left side and the right side of the fixed ring piece 202, and each motor component comprises an inner magnetic yoke 11, an outer magnetic yoke 7 and main magnetic steels, wherein the outer magnetic yokes 7 are arranged on the outer side of the inner magnetic yoke 11 at intervals, and the main magnetic steels are arranged between the inner magnetic yoke 11 and the outer magnetic yoke 7 and reciprocate in the axial direction of the inner magnetic yoke 11 under the action of electromagnetic force.
The outer magnetic yoke 7 is provided with a coil and two auxiliary magnetic steels 8, as shown in fig. 1, the coil is arranged on one side surface of the outer magnetic yoke 7 close to the main magnetic steel, the two auxiliary magnetic steels 8 are respectively arranged at two ends of the outer magnetic yoke 7, and grooves for installing the auxiliary magnetic steels 8 can be formed in the outer sides of the two ends of the outer magnetic yoke 7 for facilitating installation of the two auxiliary magnetic steels 8.
The main magnetic steel of one motor assembly is connected with the first piston 3 so as to drive the first piston 3 to move along the axis of the compression cavity 2011; the main magnetic steel of the other motor component is connected with the second piston 4 so as to drive the second piston 4 to move along the axis of the compression cavity 2011;
it can be appreciated that the inner yoke 11, the outer yoke 7, the main magnet steel and the two auxiliary magnet steels 8 are ring-shaped members.
According to the linear compressor provided by the embodiment of the invention, the two auxiliary magnetic steels 8 are arranged on the outer magnetic yoke 7 of the motor assembly at intervals, so that the working efficiency of the linear compressor provided by the embodiment of the invention is greatly improved.
In some embodiments, an annular groove 701 for mounting the coil is provided on the inner wall surface of the outer yoke 7, the annular groove 701 being provided to extend in the circumferential direction of the outer yoke 7; the coil is disposed within the annular groove 701.
According to the linear compressor provided by the embodiment of the invention, the annular groove 701 for installing the coil is arranged on the inner wall surface of the outer magnetic yoke 7, so that the convenience of coil installation is greatly improved, and the convenience of coil installation is further improved.
In some embodiments, as shown in fig. 1, the two motor components are a first motor component 5 and a second motor component 6, the main magnetic steel of the first motor component 5 is a first main magnetic steel 501, the main magnetic steel of the second motor component 6 is a second main magnetic steel 601, the coil of the first motor component 5 is a first coil 503, and the coil of the second motor component 6 is a second coil 603;
the first coil 503 is magnetically connected with the first main magnetic steel 501 to drive the first main magnetic steel 501 to move in the axial direction of the cylinder 201, and further drive the first piston 3 to move along the axis of the compression cavity 2011;
the second coil 603 is magnetically connected to the second main magnetic steel 601 to drive the second main magnetic steel 601 to move in the axial direction of the cylinder 201, and further drive the second piston 4 to move along the axis of the compression chamber 2011.
Further, the linear compressor of the embodiment of the invention further comprises two magnetic steel frameworks, namely a first magnetic steel framework 502 and a second magnetic steel framework 602,
the first magnetic steel framework 502 is respectively connected with the first main magnetic steel 501 and the first piston 3, so that the first piston 3 is driven to move along the axis of the compression cavity 2011 through the reciprocating movement of the first main magnetic steel 501;
the second magnetic steel skeleton 602 is respectively connected with the second main magnetic steel 601 and the second piston 4, so that the second piston 4 is driven to move along the axis of the compression cavity 2011 by the reciprocating movement of the second main magnetic steel 601.
Further, as shown in fig. 1, the first magnetic steel skeleton 502 includes a first skeleton body 5021 and a first connecting portion 5022, the first skeleton body 5021 is disposed on the left side of the cylinder 201, the first connecting portion 5022 extends rightward from the first skeleton body 5021, and one end of the first connecting portion 5022 away from the first skeleton body 5021 is connected with the first main magnetic steel 501 of the first motor assembly 5;
the first piston 3 is connected to a side surface of the first frame body 5021 near the cylinder 201.
The second magnetic steel framework 602 comprises a second framework body 6021 and a second connecting part 6022, the second framework body 6021 is arranged on the left side of the cylinder 201, the second connecting part 6022 extends rightwards from the second framework body 6021, and one end, far away from the second framework body 6021, of the second connecting part 6022 is connected with second main magnetic steel 601 of the second motor assembly 6;
the second piston 4 is connected to a side surface of the second frame body 6021 near the cylinder 201.
Further, the linear compressor according to the embodiment of the present invention further includes two housings 1 and two elastic members 9, and the two elastic members 9 are a first elastic member 901 and a second elastic member 902, respectively.
One of the housings 1 is arranged on the left side of the stationary ring 202, and one of the housings 1 and the cylinder block 2 defines a first accommodation chamber 101 accommodating the first motor assembly 5,
wherein the other housing 1 is arranged on the right side of the stationary ring 202 and wherein the other housing 1 and the cylinder block 2 define a second receiving chamber 102 for receiving the second motor assembly 6.
It will be appreciated that the two housings may be provided as a unitary structure forming a single housing structure that fits over the outside of the cylinder block to define the first and second receiving chambers 101, 102.
Wherein the first elastic member 901 is disposed in the first accommodation chamber 101, and wherein a central portion of the first elastic member 901 is connected to a side surface of the first skeletal body 5021 remote from the cylinder 201, wherein an outer side of the first elastic member 901 abuts against an inner wall surface of the housing 1 disposed on the left side.
Alternatively, the first elastic member 901 is a first plate spring, wherein a central portion of the first plate spring is connected to the first skeletal body, and it can be understood that the first plate spring is connected to the first skeletal body by welding or screwing.
Further, a first leaf spring support 121 may be arranged between the first leaf spring and the first housing, for example, the outer side of the first leaf spring is connected to the first leaf spring support 121, it being understood that the first leaf spring and the first leaf spring support 121 are connected by welding or screwing.
Meanwhile, an end face of the outer yoke on one side thereof in the axial direction is connected to the first plate spring bracket 121, and an end face of the outer yoke on the other side thereof in the axial direction is connected to the cylinder block.
The first elastic member can radially support and axially limit the first main magnetic steel 501 and the first piston 3, so that the first main magnetic steel 501 and the first piston 3 can always move in the axial direction of the compression cavity 2011.
Wherein the second elastic member 902 is disposed in the second accommodation chamber thereof, and wherein a center portion of the second elastic member 902 abuts against a side surface of the second skeletal body remote from the cylinder 201, wherein an outer side of the second elastic member 902 abuts against an inner wall surface of the casing 1 disposed on the right side.
Alternatively, the second elastic member 902 is a second plate spring, wherein a central portion of the second plate spring is connected to the second skeletal body, and it can be understood that the second plate spring is connected to the second skeletal body by welding or screwing.
Further, a second leaf spring support 122 may be arranged between the second leaf spring and the second housing, for example, the outer side of the second leaf spring is connected to the second leaf spring support 122, it being understood that the second leaf spring and the second leaf spring support 122 are connected by welding or screwing.
Meanwhile, an end face of the outer yoke on one side thereof in the axial direction is connected to the second plate spring bracket 122, and an end face of the outer yoke on the other side thereof in the axial direction is connected to the cylinder block.
The second elastic member 902 can radially support and axially limit the second main magnetic steel 601 and the second piston 4, so that the second main magnetic steel 601 and the second piston 4 can always move in the axial direction of the compression cavity 2011.
Therefore, the linear compressor of the embodiment of the invention greatly improves the working efficiency of the linear compressor of the embodiment of the invention by arranging the two auxiliary magnetic steels 8 on the outer magnetic yoke 7 of the motor assembly at intervals.
In some embodiments, the linear compressor according to the present invention further includes a gas path channel 10, where the gas path channel 10 extends in the radial direction of the fixed ring member 202 and is disposed in the fixed ring member 202, and the gas path channel 10 is in communication with the compression chamber 2011, so that gas can enter and exit the compression chamber 2011.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. An electric motor assembly, comprising:
an inner yoke;
the outer magnetic yoke is arranged at intervals on the outer side of the inner magnetic yoke, and a coil and auxiliary magnetic steel are arranged on the outer magnetic yoke;
and the main magnetic steel is arranged between the inner magnetic yoke and the outer magnetic yoke.
2. The motor assembly according to claim 1, wherein the auxiliary magnetic steel has two, and the two auxiliary magnetic steels are respectively disposed at both ends of the outer yoke in the axial direction thereof.
3. The motor assembly according to claim 2, wherein the magnetizing direction of the auxiliary magnetic steel is from a side close to the center of the outer yoke to a side far from the center of the outer yoke in the axial direction of the outer yoke;
the magnetizing direction of the main magnetic steel is from inside to outside along the radial direction of the main magnetic steel.
4. The motor assembly according to claim 2, wherein the outer yoke has grooves at both ends in an axial direction thereof, respectively, and the two auxiliary magnetic steels are respectively installed in the grooves at the corresponding ends of the outer yoke.
5. The motor assembly of claim 2, wherein the auxiliary magnetic steel is annular and is coaxially disposed with the outer yoke.
6. The motor assembly of claim 2, wherein two of the auxiliary magnetic steels are symmetrically arranged at both ends of the outer yoke.
7. The motor assembly of claim 1, wherein the auxiliary magnetic steel is made of a hard magnetic material.
8. The motor assembly of claim 1, wherein the auxiliary magnetic steel and the outer yoke are fixed by gluing or welding.
9. A linear compressor, comprising
A cylinder block having a compression chamber;
the piston is arranged in the compression cavity in a sliding manner;
the motor assembly of any one of claims 1-8, wherein a primary magnetic steel of the motor assembly is coupled to the piston to drive the piston to reciprocate within the compression chamber.
10. The linear compressor of claim 9, further comprising a magnet armature coupled to the piston and the main magnet respectively such that the main magnet drives the piston to reciprocate within the compression chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310358552.9A CN116599315A (en) | 2023-04-06 | 2023-04-06 | Motor assembly and linear compressor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310358552.9A CN116599315A (en) | 2023-04-06 | 2023-04-06 | Motor assembly and linear compressor with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116599315A true CN116599315A (en) | 2023-08-15 |
Family
ID=87599716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310358552.9A Pending CN116599315A (en) | 2023-04-06 | 2023-04-06 | Motor assembly and linear compressor with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116599315A (en) |
-
2023
- 2023-04-06 CN CN202310358552.9A patent/CN116599315A/en active Pending
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