CN107086684B - Rotor, manufacturing method thereof, rotary compressor and air conditioner - Google Patents
Rotor, manufacturing method thereof, rotary compressor and air conditioner Download PDFInfo
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- CN107086684B CN107086684B CN201710514043.5A CN201710514043A CN107086684B CN 107086684 B CN107086684 B CN 107086684B CN 201710514043 A CN201710514043 A CN 201710514043A CN 107086684 B CN107086684 B CN 107086684B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
-
- 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 invention provides a rotor and a manufacturing method thereof, a rotary compressor and an air conditioner, wherein the rotor comprises: a rotor core including at least one rotor slot; at least one vent hole arranged in the rotor core, each vent hole penetrating through two end faces of the rotor; still include at least one aluminium strip, every aluminium strip corresponds the setting with every rotor groove, every aluminium strip outer wall and every rotor groove inner wall laminating, wherein, the air vent sets up with the rotor groove is independent. According to the technical scheme, the rotor can better realize oil-gas separation and oil return, the rotor magnetic circuit is reasonable, and the operation efficiency is higher.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a rotor, a rotary compressor, an air conditioner and a manufacturing method of the rotor.
Background
At present, a rotor of an air conditioner rotary compressor comprises an aluminum end ring and an aluminum strip, wherein the aluminum end ring and the aluminum strip are formed by die casting in a high pressure injection mode, and particularly the aluminum is hydraulically cast into the rotor in the high pressure injection mode. Because air is mixed in the molten aluminum and the die casting process, more air remains in the aluminum liquid in the high-pressure die casting process, so that more tiny air holes are formed in the aluminum end rings and the aluminum strips. Because of the existence of the air holes, the resistance of the rotor is increased, so that the rotor loss is large, the heat is large, the energy efficiency of the rotary compressor is influenced, and the reliability of the rotary compressor is reduced. To solve this problem, the existing method is to enlarge the sectional area of the aluminum bar of the rotor or enlarge the volume of the aluminum end ring. However, the increase of the aluminum strip section of the rotor reduces the occupied area of silicon steel, improves the magnetic density of the rotor and increases the iron loss and magnetic leakage, so that the method has adverse effect on the running efficiency of the rotary compressor.
Meanwhile, because the occupied area of the aluminum strips of the rotor is larger, the magnetic density on the rotor core is saturated, and the air holes cannot be opened any more, so that the oil-gas separation and the backflow of the refrigerating machine oil are not facilitated, and the reliability of the rotary compressor is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first object of the invention is to provide a rotor.
A second object of the present invention is to provide a rotary compressor.
A third object of the present invention is to provide an air conditioner.
A fourth object of the present invention is to provide a method for manufacturing a rotor.
To achieve the above object, a first aspect of the present invention provides a rotor, including: the rotor core comprises at least one rotor groove, at least one vent hole is formed in the rotor core, and each vent hole penetrates through two end faces of the rotor; at least one aluminum strip, each aluminum strip is correspondingly arranged with each rotor groove, the outer wall of each aluminum strip is attached to the inner wall of each rotor groove, wherein the vent holes are independently arranged with the rotor grooves, and the radial cross-sectional area S of the single aluminum strip 1 Number n of aluminum strips 1 The radial cross-sectional area S of the rotor satisfies the relation:
in the technical scheme, the vent holes and the aluminum strips are arranged in the rotor core, the vent holes and the rotor groove for placing the aluminum strips are arranged independently, and the vent holes can be arranged under the condition that the resistance of the aluminum strips is not increased, so that the rotor resistance is small; an air hole is formed in the rotor core, so that oil-gas separation and return flow of refrigerating machine oil are facilitated; each vent hole penetrates through two end faces of the rotor, so that high-pressure gas and refrigerating machine oil in the running process can pass through the rotor body; each aluminum strip outer wall is attached to each rotor groove inner wall, gaps are not formed between the aluminum strips and the rotor grooves, the combination of the aluminum strips and the rotor is firmer, and the rotor structure is more compact.
Preferably, the size parameters of each rotor groove are the same, that is, the size parameters of the aluminum strips in the rotor grooves are the same, so that the magnetic density distribution on the rotor core is uniform.
In addition, the proportional relation between the sum of the radial cross-sectional areas of the aluminum strips and the radial cross-sectional area of the rotor is defined, so that the rotor resistance is minimized and the eddy current loss generated by the rotor core is minimized, thereby improving the operation efficiency of the rotor.
In addition, the rotor in the technical scheme provided by the invention can also have the following additional technical characteristics:
in any of the above embodiments, preferably, the rotor further includes: the aluminum end ring comprises a first end ring and a second end ring, and the first end ring and the second end ring are respectively arranged on two end faces of the rotor core.
In the technical scheme, the first end ring and the second end ring are respectively added at two ends of a group of aluminum strips, so that conductors in the rotor grooves can be short-circuited to form a closed loop, and electric leakage is prevented. Meanwhile, the aluminum end ring is annular, and can avoid the position of the vent hole in the radial direction.
In any of the above embodiments, preferably, the single aluminum strip has a radial cross-sectional area S 1 Sum S of the axial cross-sectional area of the first end ring and the axial cross-sectional area of the second end ring 4 The relation is satisfied:
in the technical proposal, the radial cross-section area S of a single aluminum strip 1 Sum S of the axial cross-sectional area of the first end ring and the axial cross-sectional area of the second end ring 4 The proportional relation of the rotor is limited, and the running loss of the rotor is reduced.
In the above technical solution, preferably, when the number of the ventilation holes is plural, each ventilation hole includes a first limit position and a second limit position in a radial direction of the rotor core, and the second distance from the second limit position to the axis of the rotor core is greater than the first distance from the first limit position to the axis of the rotor core.
In the technical scheme, when the number of the vent holes is multiple, the second limit position which is farthest from the axis and the first limit position which is closest to the axis exist in the radial direction of the rotor core through the judgment of the first distance and the second distance, and as the vent holes are mostly circular and the few are rectangular, the positions of the vent holes can be determined through limiting the first limit position and the second limit position, so that the vent holes are arranged in a staggered mode with other parts in design or production conveniently, and the possibility of blocking is reduced.
The position of the vent hole can be flexibly set according to the placement position of a parallel block of the rotor, the fixed position of the rotor and/or the placement position of an additional baffle plate, namely, the vent hole can be discretely arranged on the rotor, and a person skilled in the art should understand that as long as two ends of the vent hole penetrate through two end faces of the rotor, the vent effect can be realized, and the specific position, the shape and the size of the vent hole can be adaptively adjusted.
In addition, the vent holes can be uniformly distributed and penetrated on the upper end face and the lower end face, and are uniformly distributed in a circumferential array relative to the asymmetric distribution of the vent holes, so that high-pressure gas in the running process of the rotor can be uniformly discharged, and the condition that the strength of the rotor is low and the running is easy to be unstable due to the fact that a certain vent hole bears excessive pressure of the high-pressure gas is prevented, and therefore the strength and the stability of the rotor are improved due to the fact that the vent holes are distributed in the circumferential array along the axis of the rotor.
In any of the above solutions, preferably, the second distance is smaller than the inner diameter radius of the aluminum end ring.
In the technical scheme, the second distance of the vent holes is smaller than the inner diameter radius of the aluminum end ring, and the position of the vent holes in the radial direction avoids the position of the aluminum end ring, so that the high-pressure gas discharge path and the refrigerator oil return path are unobstructed.
In any of the above aspects, preferably, the single vent radial cross-sectional area S 2 Number of vent holes n 2 The radial cross-sectional area of the rotor satisfies the relation:
in the technical scheme, in order to reduce the influence on the magnetic density of the rotor and achieve better oil-gas separation and oil return effects, the proportional relation between the radial cross-sectional area and the number of the vent holes and the radial cross-sectional area of the rotor is limited.
In any of the above technical solutions, preferably, the rotor slot includes a third limit position and a fourth limit position in a radial direction of the rotor core, and a fourth distance from the fourth limit position to an axis of the rotor core is greater than a third distance from the third limit position to the axis of the rotor core, wherein the fourth distance is smaller than a radial radius of the rotor core; or the fourth distance is the radial radius of the rotor core.
In this embodiment, the position of the rotor slot with respect to the rotor core is defined. The rotor groove may be of any shape. Since the rotor slot occupies a certain area in a radial cross section, two extreme distances of the rotor slot with respect to the rotor central axis are defined in order to accurately describe the position of the rotor slot. When the fourth distance is smaller than the radial radius of the rotor core, the stray loss of the rotary motor is smaller; when the fourth distance is the radial radius of the rotor core, the leakage flux of the rotary motor is small.
The technical scheme of the second aspect of the invention provides a rotary compressor, which comprises any one of the rotors in the technical scheme and a stator arranged corresponding to the rotors.
In this technical scheme, through adopting the rotor of arbitrary technical scheme to have the whole beneficial effect of above-mentioned rotor, promoted rotary compressor's intensity and operating stability, made rotary compressor structure compacter, saved the space, operating efficiency is higher.
The technical solution of the third aspect of the present invention provides an air conditioner, including: in a second aspect of the present invention, there is provided a rotary compressor.
In this technical solution, the rotary compressor according to the second aspect has all the advantages of the rotary compressor.
A fourth aspect of the present invention provides a method for manufacturing a rotor according to any one of the first aspect, including: heating the rotor core for a first time at a preset temperature, and detecting the temperature of the rotor core; and if the temperature reaches the temperature threshold value, rotating the rotor core at a preset speed, and injecting molten aluminum into a model sleeved outside the rotor core until the molten aluminum is completely injected, and cooling the rotor.
In the technical scheme, the aluminum end ring and the aluminum strip are cast in a centrifugal aluminum casting mode, so that air holes in aluminum liquid are effectively reduced, the possibility of increasing the resistance of a rotor due to the existence of the air holes is reduced, the loss and heat of the rotor during the operation of the rotary compressor are reduced, and the operation efficiency and reliability of the rotary compressor are improved.
In any of the above-described aspects, preferably, injecting molten aluminum into a mold fitted over the rotor core specifically includes: molten aluminum flows from one end face of the rotor core to the other end face of the rotor core.
In this technical scheme, with regard to the molten aluminum liquid being injected together by the both end faces of the rotor core, as the molten aluminum liquid flows from one end face of the rotor core to the other end face of the rotor core, air is also extruded from one end face of the rotor core to the other end face of the rotor core, so that the gas in the molten aluminum liquid is favorably discharged, and the increase in rotor resistance due to air holes is reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
FIG. 1 shows a radial cross-section of a rotor according to one embodiment of the invention;
FIG. 2 illustrates an axial cross-sectional view of a rotor according to one embodiment of the invention;
FIG. 3 illustrates an axial cross-sectional view of a compressor according to one embodiment of the present invention;
fig. 4 is a block diagram schematically showing the structure of an air conditioner according to an embodiment of the present invention;
FIG. 5 illustrates a machining schematic of a rotor according to one embodiment of the invention;
fig. 6 shows a schematic process flow diagram of a rotor according to an embodiment of the invention.
The correspondence between the reference numerals and the component names in fig. 1 to 6 is:
1 air conditioner, 10 rotary compressor, 102 rotor, 104 stator, 1022 aluminum strip, 1024 vent hole, 1026 aluminum end ring, 10262 first end ring, 10264 second end ring, 1028 rotor core, 1030 rotor slot, 502 molten aluminum, 504 model, 5042 upper end ring die, 5044 middle cavity die, 5046 lower end ring die.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and the scope of the invention is therefore not limited to the specific embodiments disclosed below.
Hereinafter, a rotor, a rotary compressor, an air conditioner, and a method of manufacturing the rotor according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 6.
As shown in fig. 1 and 2, a rotor 102 according to an embodiment of the present invention includes: rotor core 1028, rotor core 1028 including at least one rotor slot 1030, rotor core 1028 further including at least one vent 1024 disposed within rotor core 1028, each vent 1024 extending through two of the rotorsAn end face; at least one aluminum strip 1022, each aluminum strip 1022 is disposed corresponding to each rotor slot 1030, each aluminum strip 1022 outer wall is bonded to each rotor slot 1030 inner wall, wherein the vent 1024 is disposed independently of the rotor slots 1030, and the radial cross-sectional area S of the individual aluminum strips 1022 1 Number n of aluminum strips 1022 1 The radial cross-sectional area S of the rotor 102 satisfies the relationship:
in this embodiment, the vent 1024 and the aluminum strips are both provided in the rotor core, and the vent 1024 is provided independently of the position of the rotor slot 1030 in which the aluminum strip 1022 is placed, so that the vent 1024 can be provided without increasing the resistance of the aluminum strip 1022, and the rotor 102 has a small resistance; the air holes 1024 are opened on the rotor iron core 1028, which is beneficial to oil-gas separation and return of refrigerator oil; each vent 1024 penetrates through both end surfaces of the rotor, enabling high pressure gas and refrigerator oil during operation to pass through the rotor body; the outer wall of each aluminum strip 1022 is attached to the inner wall of each rotor groove, and no gap exists between the aluminum strips 1022 and the rotor grooves 1030, so that the combination of the aluminum strips 1022 and the rotor 102 is more stable, and the rotor 102 is more compact in structure.
Preferably, the dimensional parameters of each rotor slot 1030 are the same, i.e., the dimensional parameters of the aluminum strips 1022 in the rotor slots 1030 are the same, so that the magnetic density distribution on the rotor core 1028 is relatively uniform.
Further, by limiting the proportional relationship between the sum of the radial sectional areas of the aluminum strips 1022 and the radial sectional area of the rotor 102, the motor loss is balanced most in this range, and the operation efficiency of the rotor 102 is improved. The radial cross-section of the individual aluminum strips 1022 may be of any closed shape.
In addition, the refrigerating system in the embodiment provided by the invention can also have the following additional technical characteristics:
in the above embodiment, it is preferable that the radial cross-sectional area S of the single aluminum strip 1022 1 Number n of aluminum strips 1022 1 The radial cross-sectional area S of the rotor 102 satisfies the relationship:
in this embodiment, the proportional relationship between the sum of the radial sectional areas of the aluminum strips 1022 and the radial sectional area of the rotor 102 is defined, and in this range, the resistance of the rotor 102 is minimized, and the eddy current loss generated in the rotor core 1028 is minimized, thereby improving the operation efficiency of the rotor 102. The radial cross-section of the individual aluminum strips 1022 may be of any closed shape.
In any of the above embodiments, preferably, the rotor 1 further includes: aluminum end ring 1026, aluminum end ring 1026 includes a first end ring 10262 and a second end ring 10264, and first end ring 10262 and second end ring 10264 are disposed on two end faces of rotor core 1028, respectively.
In this embodiment, a first end ring 10262 and a second end ring 10264 are added to two ends of a group of aluminum strips 1022 respectively, so that the conductors in the rotor slots 1030 can be shorted to form a closed loop, and leakage is prevented. Meanwhile, the aluminum end ring 1026 is annular, and can avoid the position of the vent 1024 in the radial direction.
In any of the above embodiments, it is preferred that the radial cross-sectional area S of the individual aluminum strips 1022 1 Sum S of the axial cross-sectional area of the first end ring and the axial cross-sectional area of the second end ring 4 The relation is satisfied:
in this embodiment, the radial cross-sectional area S for a single aluminum strip 1022 1 Sum S of the axial cross-sectional area of the first end ring and the axial cross-sectional area of the second end ring 4 The proportional relation of the rotor is limited, and the running loss of the rotor is reduced.
In any of the above embodiments, preferably, when the number of the ventilation holes 1024 is plural, each ventilation hole 1024 includes a first limit position and a second limit position in the radial direction of the rotor core 1028, and the second distance of the second limit position from the axis of the rotor core 1028 is greater than the first distance of the first limit position from the axis of the rotor core 1028.
In this embodiment, when the number of the ventilation holes 1024 is plural, since the ventilation holes 1024 occupy a certain area in a radial section, for convenience of description, the nearest position of the ventilation holes 1024 from the axis of the rotor core 1028 is defined as a first limit position, and the corresponding distance is a first distance; the furthest position of the vent 1024 from the axis of the rotor core 1028 is the second limit position, and the corresponding distance is the second distance. The second distance of the second limit position from the axis of rotor core 1028 is thus greater than the first distance of the first limit position from the axis of rotor core 1028. By determining the first distance and the second distance, it is determined that a second limit position, which is farthest from the axis, and a first limit position, which is closest to the axis, exist in the radial direction of the rotor 102 core for each vent 1024, and since the vent 1024 is mostly circular and a small part is rectangular, the position of the vent 1024 can be determined by defining the first limit position and the second limit position, so that the vent 1024 is easily arranged in a dislocation manner with other components during design or production, and the possibility of occurrence of blockage is reduced.
The position of the vent 1024 may be flexibly set according to the placement position of the parallel block of the rotor 102, the fixed position of the rotor 102, and/or the placement position of the additional baffle, that is, may be disposed on the rotor 102, and those skilled in the art should understand that as long as two ends of the vent 1024 penetrate through two end surfaces of the rotor 102, a venting effect may be achieved, and the specific position and the shape and size of the vent 1024 may be adaptively adjusted.
In addition, the vent 1024 may be uniformly distributed on the upper and lower end surfaces, and for the case of asymmetric distribution of the vent 1024, the vent 1024 is uniformly distributed in a circumferential array with respect to the axis of the rotor 102, so that the high-pressure gas in the running process of the rotor 102 can be uniformly discharged, and the condition that a certain vent 1024 bears the excessive pressure of the high-pressure gas, resulting in the low strength of the rotor 102 and easy instability in running is prevented, so that the vent 1024 is distributed in a circumferential array with the axis of the rotor 102, and the strength and stability of the rotor 102 are improved.
In any of the above embodiments, the second distance is preferably less than the inner diameter radius of the aluminum end ring 1026.
In this embodiment, the second distance of the vent 1024 is less than the inner diameter radius of the aluminum end ring 1026, and the position of the vent 1024 in the radial direction avoids the position of the aluminum end ring 1026, thereby opening the high pressure gas discharge path and the refrigerator oil return path.
In any of the above embodiments, it is preferred that the radial area S of the single vent 1024 2 Number n of ventilation holes 1024 2 The radial cross-sectional area S of the rotor 102 satisfies the relationship:
in this embodiment, in order to reduce the influence on the magnetic density of the rotor 102 and achieve better oil-gas separation and oil return, the proportional relationship between the radial cross-sectional area, number, and radial cross-sectional area of the rotor 102 is defined for the vent 1024.
In any of the above embodiments, it is preferable that the rotor slot 1030 includes a third limit position and a fourth limit position in the radial direction of the rotor core 1028, the fourth limit position being a fourth distance from the axis of the rotor core 1028 greater than the third distance from the axis of the rotor core 1028, wherein the fourth distance is less than the radial radius of the rotor core 1028; or the fourth distance is the radial radius of rotor core 1028.
In this embodiment, the position of rotor slots 1030 relative to rotor core 1028 is defined. The rotor slot 1030 may be any shape. Since the rotor slot 1030 occupies a certain area in a radial cross section, two extreme distances of the rotor slot 1030 with respect to the central axis of the rotor 102 are defined in order to accurately describe the position of the rotor slot 1030. When the fourth distance is smaller than the radial radius of rotor core 1028, the stray loss of the rotary motor is smaller; when the fourth distance is the radial radius of the rotor core 1028, the leakage flux of the rotary motor is small.
As shown in fig. 3, the rotary compressor 10 according to an embodiment of the present invention includes a rotor 102 and a stator 104 provided corresponding to the rotor 102.
In this embodiment, by adopting the rotor 102 of any one of the embodiments, all the beneficial effects of the rotor 102 are achieved, the strength and the operation stability of the rotary compressor 10 are improved, the structure of the rotary compressor 10 is more compact, the space is saved, and the operation efficiency is higher.
As shown in fig. 4, the air conditioner 1 according to one embodiment of the present invention includes a rotary compressor 10.
In this embodiment, by adopting the rotary compressor 10 of the above embodiment, all the advantageous effects of the rotary compressor 10 described above are obtained.
As shown in fig. 5 and 6, a method for manufacturing a rotor 102 according to an embodiment of the present invention, for manufacturing a rotor 102 provided in any one of the above first aspect of the present invention, includes: step S602, heating rotor core 1028 for a first time at a preset temperature, detecting a temperature of rotor core 1028; in step S604, if the temperature reaches the temperature threshold, the rotor core 1028 is rotated at a predetermined speed, and the molten aluminum 502 is injected into the mold 504 sleeved outside the rotor core 1028 until the molten aluminum 502 is completely injected, and then the rotor 102 is cooled.
In this embodiment, the aluminum end ring 1026 and the aluminum strips 1022 are cast by centrifugal aluminum casting, so that the air holes in the molten aluminum 502 are effectively reduced, the possibility of increasing the resistance of the rotor 102 due to the existence of the air holes is reduced, and the loss and heat generation of the rotor 102 during the operation of the rotary compressor 10 are reduced, thereby improving the energy efficiency and reliability of the rotary compressor 10.
In any of the above embodiments, preferably, in step S604, injecting molten aluminum 502 into a mold 504 fitted over a rotor core 1028 specifically includes:
In this embodiment, with respect to molten aluminum 502 being injected together from both end surfaces of rotor core 1028, as molten aluminum 502 flows from one end surface of rotor core 1028 to the other end surface of rotor core 1028, air is also extruded from one end surface of rotor core 1028 to the other end surface of rotor core 1028, so that it is advantageous for gas in molten aluminum 502 to be removed, reducing adverse effects on the increase in resistance of rotor 102 due to air holes.
Specific examples:
in the present embodiment, as shown in fig. 1 and 2, the rotor 102 is a cylinder, the aluminum strips 1022 are filled in the space of the rotor groove 1030, and the radial cross-sectional area of the aluminum strips 1022 is S 1 Is 18mm 2 Number n of aluminum strips 1022 1 30, the radial cross-sectional area S of the rotor 104 is 2500mm 2 ，
In the range of 0.2 to 0.24. Wherein the radial section of the aluminum strip is in any closed shape, and the specific embodiment is in a water drop shape.
The axial cross-sectional area of the first end ring 10262 is 250mm 2 The axial cross-sectional area of the second end ring 10264 is 230mm 2 The sum of the two is 400mm 2 . The radial cross-sectional area of the aluminum strip is 18mm 2 The ratio to the sum of the axial cross-sectional areas of the first end ring 10262 and the second end ring 10264 is 0.0375, in the range of 0.03 to 0.1.
The ventilation holes 1024 are distributed in a circumferential array with the axis of the rotor 104 as the center, wherein the second distance of the ventilation holes 1024 in the radial direction of the rotor core 1028 is smaller than the inner diameter radius of the aluminum end ring 1026. Number n of vent holes 2 4 radial cross-sectional areas S 2 15mm of 2 ,
Within the range of 0 to 0.03.
As shown in fig. 3, the rotary compressor 10 includes a rotor 102 and a corresponding stator 104. The stator 104 is fixed in the rotary compressor 10, and the rotor 102 is fixed in the stator by a bearing and rotates by electromagnetic force.
As shown in fig. 5 and 6, the method of manufacturing the rotor 102 includes: the rotor core 1028 is preheated to a temperature of 500 ℃. At this temperature, the molten aluminum 502 can flow into the rotor groove more smoothly. The rotor core 1028 is positioned between the upper end ring die 5042, the middle cavity die 5044 and the lower end ring die 5046, wherein molten aluminum 502 flows into the upper end ring die 5042, flows downwards through the rotor slots 1030 in the rotor core 1028 due to gravity, and flows out of the lower end ring die 5046. The molten aluminum 502 fills the cavities of the lower end ring die 5046, the rotor slots 1030 of 1028 in the rotor core, and the cavities of the upper end ring die 5042 from bottom to top, respectively. The whole aluminum casting process has a slower speed in the range of 20-120 seconds.
Throughout the injection process of molten aluminum 502, the upper end ring die 5042, the middle cavity die 5044, the lower end ring die 5046 and the rotor core 1028 are driven by equipment to rotate together according to arrows shown in fig. 5, and the rotation speed can be variable or constant. In this embodiment, the molten aluminum 502 is rotated at 1000rpm when flowing into the mold 504 and the rotor core 1028. Wherein the intermediate cavity mold 5044 may be absent. The rotor 102 is cooled after centrifugal aluminum casting, and can be cooled by low-temperature liquid cooling or flowing low-temperature air. In this embodiment, low temperature air flow is used to remove heat and reduce rotor temperature.
The technical scheme of the invention is explained in detail by combining the drawings, the invention provides the rotor, the manufacturing method thereof, the rotary compressor and the air conditioner, so that the rotor can better realize oil-gas separation and oil return, the rotor resistance is small, and the operation efficiency is higher.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined 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 connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. 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 description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer 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.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A rotor, comprising: rotor core, rotor core includes at least one rotor groove, its characterized in that, rotor core still includes:
at least one vent hole arranged in the rotor core, each vent hole penetrating through two end faces of the rotor;
at least one aluminum strip, wherein each aluminum strip is arranged corresponding to each rotor groove, and the outer wall of each aluminum strip is attached to the inner wall of each rotor groove;
the aluminum end ring comprises a first end ring and a second end ring;
wherein the vent hole and the rotor groove are independently arranged,
the radial cross-sectional area of the aluminum strips, the number of the aluminum strips and the radial cross-sectional area of the rotor satisfy the relation:
wherein S is 1 For the radial cross-sectional area of the single aluminum strip, n 1 S is the radial cross-sectional area of the rotor for the number of aluminum strips;
the sum of the radial cross-sectional area of the single aluminum strip, the axial cross-sectional area of the first end ring and the axial cross-sectional area of the second end ring satisfies the relationship:
wherein S is 4 Is the sum of the axial cross-sectional area of the first end ring and the axial cross-sectional area of the second end ring;
the radial area of the vent holes, the number of the vent holes and the radial cross-sectional area of the rotor satisfy the relation:
wherein S is 2 Radial cross-sectional area of a single vent, n 2 Is the number of vent holes.
2. The rotor of claim 1, wherein the first end ring and the second end ring are disposed on two end surfaces of the rotor core, respectively.
3. The rotor of claim 1, wherein when the number of ventilation holes is plural, each ventilation hole includes a first limit position and a second limit position in a radial direction of the rotor core, the second limit position being a second distance from an axis of the rotor core greater than a first distance from the axis of the rotor core.
4. A rotor according to claim 3, wherein the second distance is less than the inner diameter radius of the aluminium end ring.
5. The rotor of claim 1, wherein the rotor slot includes a third extreme position and a fourth extreme position in a radial direction of the rotor core, the fourth extreme position being a fourth distance from an axis of the rotor core that is greater than a third distance from the axis of the rotor core, wherein the fourth distance is less than a radial radius of the rotor core; or the fourth distance is a radial radius of the rotor core.
6. A rotary compressor comprising the rotor according to any one of claims 1 to 5 and a stator provided in correspondence with the rotor.
7. An air conditioner comprising the rotary compressor of claim 6.
8. A method of manufacturing a rotor according to any one of claims 1 to 5, comprising:
heating a rotor core for a first time at a preset temperature, and detecting the temperature of the rotor core;
and if the temperature reaches a temperature threshold value, rotating the rotor core at a preset speed, and injecting molten aluminum into a model sleeved outside the rotor core until the molten aluminum is completely injected, and cooling the rotor.
9. The method of manufacturing a rotor according to claim 8, wherein the injecting molten aluminum into the mold fitted to the rotor core comprises:
the molten aluminum flows from one end face of the rotor core to the other end face of the rotor core.
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| CN107666226A (en) * | 2017-11-13 | 2018-02-06 | 安徽美芝精密制造有限公司 | Rotor and there is its motor, compressor and refrigeration plant |
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| CN107086684A (en) | 2017-08-22 |
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