Compressor rotor, manufacturing method thereof, mold and compressor

Abstract

The invention provides a compressor rotor, a manufacturing method thereof, a mold and a compressor, and the compressor rotor comprises an iron core punching sheet which is internally provided with a plurality of axial channels and a plurality of magnet grooves; the magnets are in one-to-one correspondence with the magnet grooves and are positioned in the magnet grooves; the second baffle component comprises a baffle structure and a plurality of connecting structures, the baffle structure is located at one shaft end after the plurality of iron core punching sheets are stacked, the connecting structures are in one-to-one correspondence with the axial channels, one end of each connecting structure is connected with the baffle structure, and the other end of each connecting structure is in one-to-one correspondence with the axial channels. And the other end of the connecting structure passes through and extends out of the axial channel to form an end part of which the outer diameter is greater than the inner diameter of the axial channel, so that the plurality of iron core punching sheets are fixed between the end part and the baffle plate structure. The connecting structure and the baffle structure of the second baffle component of the compressor rotor are integrally formed, the assembling steps of the compressor rotor are simplified, and the compressor rotor has the advantages of being high in connecting strength, reliable in connection and easy and convenient to assemble.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor rotors, and in particular to a compressor rotor and a manufacturing method thereof, a mold and a compressor. Background Art

[0002] The iron core of the air-conditioning compressor is an important part of the compressor motor, and undertakes the important task of converting electrical energy into mechanical energy. The stator iron core and the rotor iron core interact with each other through the magnetic field to realize the conversion of electrical energy into mechanical energy, drive the impeller to rotate, and thus drive the refrigerant to circulate and realize the entire refrigeration process.

[0003] The rotor core is usually composed of multiple silicon steel sheets, which are stacked together to form an iron core and fixed to the base through bearings or sleeves. Silicon steel sheets, as the main material of the iron core, greatly improve the efficiency and energy saving of the air-conditioning compressor. The rotor core is usually also equipped with a balancing block. The main function of the balancing block is to balance the dynamic force, reduce vibration and noise, and thus improve the operating stability and life of the equipment. The balancing block adjusts the mass distribution of the rotor so that the rotor can maintain dynamic balance during rotation, thereby reducing vibration and noise and ensuring the smooth operation of the equipment. Baffles are usually provided at both ends of the rotor core. The core is sandwiched between the two baffles. A balancing block is provided outside the two baffles. The connector is then inserted into the balancing block → baffle → core → baffle → balancing block in sequence, and finally the rivet is riveted on the balancing block. The assembly method of this rotor core assembly is relatively cumbersome, and it is easy to miss rivets. In addition, the gaps between the core, baffle, and balancing block are large, and impurities are easy to fall into. The balancing block is also prone to loosening. Summary of the invention

[0004] The object of the present invention is to provide a compressor rotor, a manufacturing method thereof, a mold and a compressor. The connection structure of the second baffle member of the compressor rotor and the baffle structure are integrally cast, which simplifies the assembly steps of the compressor rotor. It has the advantages of high connection strength, reliable connection and easy assembly, and is particularly suitable for variable frequency compressors.

[0005] In order to achieve the above object, the present invention provides a compressor rotor, which comprises:

[0006] An iron core punching sheet, wherein a plurality of axial channels and a plurality of magnet slots are provided in the iron core punching sheet;

[0007] A plurality of magnets, each of the magnets corresponds to the magnet slots one by one and is located in the magnet slots;

[0008] A second baffle member, the second baffle member includes a baffle structure and a plurality of connecting structures, the baffle structure is located at an axial end after a plurality of the core punching sheets are stacked, the connecting structure corresponds to the axial channel one by one, one end of the connecting structure is connected to the baffle structure, and the other end of the connecting structure passes through and extends out of the axial channel to form an end portion with an outer diameter greater than an inner diameter of the axial channel, thereby fixing a plurality of the core punching sheets between the end portion and the baffle structure.

[0009] Optionally, the compressor rotor includes a first baffle member, which is located at the other axial end of the plurality of core punching sheets, and covers the notch of the magnet slot; the connecting structure includes a connecting portion and a riveted portion, the riveted portion is the end portion of the other end of the connecting structure, one end of the connecting portion is connected to the baffle structure, and the other end is connected to the riveted portion, and the connecting portion is riveted to the first baffle member through the riveted portion.

[0010] Optionally, the second baffle member includes a balancing block, which is integrally formed with the baffle structure, and the balancing block protrudes from a side of the baffle structure that is away from the core punching sheet.

[0011] Optionally, an axial crankshaft through hole and a plurality of coolant through holes are provided in the core punching sheet.

[0012] Optionally, the baffle structure is provided with a first through hole extending along the axial direction of the core punching sheet, the first through hole is communicated with the crankshaft through hole, and the aperture of the first through hole is larger than the aperture of the crankshaft through hole.

[0013] Based on another aspect of the present invention, the present invention further provides a compressor rotor mold for molding the compressor rotor as described above, the compressor rotor mold comprising:

[0014] An upper casting mold having an upper mold cavity, wherein a plurality of pouring holes are arranged on the upper casting mold, and the pouring holes correspond to and communicate with the axial channels of the core punching sheets one by one;

[0015] A lower casting mold, which has a lower mold cavity, wherein the upper mold cavity and the lower mold cavity are combined to form a cavity, wherein the cavity is used to place a plurality of the core punching sheets to form the compressor rotor, and the space between the cavity bottom of the lower mold cavity and the core punching sheets is used to form the baffle structure of the second baffle member;

[0016] A positioning mandrel is used to position the core punch in the cavity, and the positioning mandrel extends from the bottom of the lower die cavity to the upper die cavity.

[0017] Optionally, a radially extending positioning boss is provided at one end of the positioning core shaft located at the bottom of the lower mold cavity, the outer diameter of the positioning boss is larger than the aperture of the crankshaft through hole of the core punching sheet, and the positioning boss is used to support the core punching sheet.

[0018] Optionally, the diameter of the pouring hole is larger than the inner diameter of the axial channel.

[0019] Based on another aspect of the present invention, the present invention further provides a method for manufacturing a compressor rotor, the method using the mold of the compressor rotor as described above, the method comprising:

[0020] Stacking a plurality of the core punching sheets and installing them in the cavity between the upper casting mold and the lower casting mold;

[0021] pouring molten metal through the pouring hole of the upper casting mold, so that the molten metal fills the space between the bottom of the lower mold cavity and the iron core, the axial channel and the pouring hole;

[0022] After the molten metal solidifies to form the second baffle member, a number of the core punching sheets are fixed, the upper casting mold and the lower casting mold are separated, and the core punching sheets and the second baffle member are taken out.

[0023] The present invention also provides a compressor, which has the compressor rotor as described above.

[0024] As configured above, the second baffle member of the present invention is integrally cast and formed, eliminating the operation of riveting the connection structure and the baffle structure, avoiding the situation of missing rivets, and simplifying the assembly steps of the compressor rotor. In the prior art, the iron core is limited by two baffles, and the axial limiting distance is the thickness of the iron core plus the thickness of the two baffles. The axial limiting distance is relatively long, while the axial limiting distance of the present invention is short. The axial limiting distance of the present invention is only the thickness of the iron core, and the iron core is directly fixed by the end of the connection structure. Even if the first baffle member is loose, the iron core will not be loose, which is more stable. In addition, a balancing block is also integrally formed on the second baffle member, so there is no gap between the balancing block and the baffle structure. Compared with the technical solution of the prior art in which the balancing block is installed separately, the situation of impurities falling into the gap between the balancing block and the baffle structure and the situation of the balancing block being loose are eliminated. The compressor rotor of the present invention has the advantages of high connection strength, reliable connection and simple assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Those skilled in the art should understand that the drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0026] Figure 1 An isometric view of an iron core and a second baffle member of a compressor rotor according to an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of an iron core and a second baffle member of a compressor rotor according to an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a second baffle member of a compressor rotor according to an embodiment of the present invention;

[0029] Figure 4 A top view of an iron core of a compressor rotor according to an embodiment of the present invention;

[0030] Figure 5 A bottom view of an iron core of a compressor rotor according to an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of a compressor rotor and its mold according to an embodiment of the present invention.

[0032] The reference numerals are as follows:

[0033] 1-iron core punching sheet; 11-axial channel; 12-magnet slot; 13-crankshaft through hole; 14-refrigerant through hole; 2-second baffle member; 21-baffle structure; 211-first through hole; 22-connecting structure; 221-connecting part; 222-riveted part; 23-balancing block; 3-upper casting mold; 31-pouring hole; 4-lower casting mold; 5-positioning mandrel; 51-positioning boss; 6-circumferential positioning structure. DETAILED DESCRIPTION

[0034] In this document, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", "front", "back", "top", "bottom", etc. are used to indicate directions or positional relationships based on the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction and operation. Therefore, they cannot be understood as limiting the present invention.

[0035] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer based on the following description. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0036] Please refer to Figures 1 to 5, an embodiment of the present invention provides a compressor rotor, including a core punching sheet 1, a plurality of magnets, a first baffle member (not shown in the figure) and a second baffle member 2, a plurality of core punching sheets 1 are stacked to form a rotor core, a plurality of axial channels 11 and a plurality of magnet slots 12 are provided in the core punching sheet 1, and the magnets correspond to the magnet slots 12 one by one and are located in the magnet slots 12. Further, an axial crankshaft through hole 13 and a plurality of refrigerant through holes 14 are provided in the core punching sheet 1, the crankshaft through hole 13 is used for the crankshaft to pass through, and the refrigerant through hole 14 is used for the refrigerant to pass through. For example, the number of refrigerant through holes 14 can be, for example, 4, the number of magnet slots 12 can be, for example, 6, the crankshaft through hole 13 is located at the center of the core punching sheet 1, the refrigerant through hole 14 is arranged around the crankshaft through hole 13, the magnet slots 12 are arranged around the crankshaft through hole 13, and the distance between the magnet slots 12 and the crankshaft through hole 13 is farther than the distance between the refrigerant through hole 14 and the crankshaft through hole 13.

[0037] The first baffle member is located at the other axial end after a plurality of core punching sheets 1 are stacked, and the first baffle member covers the slot of the magnet slot 12. It can be understood that the axial end of the core punching sheet 1 is the axial end of the rotor core. The magnet slot 12 can be, for example, a long blind hole, and the first baffle member covers the slot of the magnet slot 12 to prevent the magnet from falling out of the core punching sheet 1.

[0038] The second baffle member 2 includes a baffle structure 21 and a plurality of connecting structures 22, and the connecting structure 22 and the baffle structure 21 are integrally formed, the baffle structure 21 is located at one axial end of the core punching sheet 1, the connecting structure 22 corresponds to the axial channel 11 one by one, one end of the connecting structure 22 is connected to the baffle structure 21, and the other end of the connecting structure 22 passes through and extends out of the axial channel 11 to form an end portion with an outer diameter greater than the inner diameter of the axial channel 11, so that the end portion can limit the axial position of the core punching sheet 1, thereby fixing a plurality of core punching sheets 1 between the end portion and the baffle structure 21. The core punching sheet 1 generally refers to a silicon steel sheet.

[0039] Further, the connection structure 22 includes a connection portion 221 and a riveted portion 222. The riveted portion 222 is the end of the other end of the connection structure 22 mentioned above. One end of the connection portion 221 is connected to the baffle structure 21, and the other end is connected to the riveted portion 222. The connection portion 221 is riveted to the first baffle member through the riveted portion 222. The outer diameter of the riveted portion 222 is greater than the outer diameter of the connection portion 221. It can be understood that the first baffle member is provided with a plurality of second through holes, and the second through holes correspond to the connection structure 22 one by one. The second through holes are used for the connection structure 22 to pass through, that is, for the riveted portion 222 to pass through, and the riveted portion 222 will slightly extend out of the opening of the second through hole. Exemplarily, the method of riveting the riveted portion 222 to the first baffle member includes: riveting and extruding the portion of the riveted portion 222 extending out of the second through hole, so that the riveted portion 222 is deformed and riveted on the surface of the first baffle member outside the opening of the second through hole. It can be understood that the riveted portion 222 is riveted on the surface of the first baffle member away from the core punching sheet 1. Exemplarily, the number of the connecting structures 22 is not less than 3, and the outer diameter of the connecting structure 22 is not less than 4 mm, which can ensure the connection strength of the casting, and the number of the connecting structures 22 is generally not more than 8.

[0040] Preferably, the second baffle member 2 includes a balancing block 23, which is integrally formed with the baffle structure 21, and the balancing block 23 protrudes from the side of the baffle structure 21 away from the core punching sheet 1. The balancing block can adjust the mass distribution of the rotor so that the rotor can maintain dynamic balance when rotating, thereby reducing vibration and noise and ensuring the smooth operation of the equipment. In addition, the balancing block 23 is integrally formed with the baffle structure 21, eliminating the step of connecting the balancing block to the baffle structure.

[0041] A balancing block may also be provided on the first baffle member. The balancing block may be integrally formed with the first baffle member. The balancing block and the first baffle member may also be two separate components.

[0042] The baffle structure 21 is provided with a first through hole 211 extending along the axial direction of the core punching sheet 1, the first through hole 211 is communicated with the crankshaft through hole 13, and the aperture of the first through hole 211 is larger than the aperture of the crankshaft through hole 13. Furthermore, the first through hole 211 and the crankshaft through hole 13 are coaxial.

[0043] As configured above, the second baffle member 2 of the present invention is integrally cast, eliminating the operation of riveting the connection structure 22 and the baffle structure 21, avoiding the situation of missing rivets, and simplifying the assembly steps of the compressor rotor. In addition, the second baffle member 2 is also integrally formed with a balancing block 23, so there is no gap between the balancing block 23 and the baffle structure 21. Compared with the technical solution of the prior art in which the balancing block is installed separately, it eliminates the situation of impurities falling into the gap between the balancing block and the baffle structure, and the situation of the balancing block loosening. In addition, in the prior art, two baffles are used to limit the position of a plurality of core punching sheets 1, and the axial limiting distance is the thickness of the plurality of core punching sheets 1 plus the thickness of the two baffles. The axial limiting distance is relatively long, while the axial limiting distance of the present invention is short. The axial limiting distance of the present invention is only the thickness of the plurality of core punching sheets 1, and is directly fixed and pressed on the end face of the core punching sheet 1 through the end of the connection structure. Even if the first baffle member is loose, the plurality of core punching sheets 1 will not be loose, and it is more stable. The compressor rotor of the present invention has the advantages of high connection strength, reliable connection and simple assembly, and is particularly suitable for variable frequency compressors.

[0044] According to another aspect of the present invention, please refer to Figure 6 The present invention also provides a compressor rotor mold for molding the compressor rotor as above. The compressor rotor mold includes an upper casting mold 3, a lower casting mold 4 and a positioning mandrel 5. The cast molten metal can be aluminum liquid.

[0045] The upper mold 3 has an upper mold cavity, and is provided with a plurality of pouring holes 31, which correspond to and communicate with the axial channels 11 of the core punching sheet 1. Further, the diameter of the pouring holes 31 is larger than the inner diameter of the axial channel 11, and the pouring holes 31 are used to form the riveted portion 222.

[0046] The lower casting mold 4 has a lower mold cavity, and the upper mold cavity and the lower mold cavity are combined to form a cavity, and the cavity is used to place a plurality of core punching sheets 1 to form the compressor rotor. The space between the bottom of the lower mold cavity and the core punching sheet 1 is used to form the baffle structure 21 of the second baffle member 2. It can be understood that the balancing block 23 is also formed in the space between the bottom of the lower mold cavity and the core punching sheet 1.

[0047] The positioning mandrel 5 is used to position the core punch 1 in the cavity, and the positioning mandrel 5 extends from the bottom of the lower die cavity to the upper die cavity. Further, a radially extending positioning boss 51 is provided at one end of the positioning mandrel 5 located at the bottom of the lower die cavity, that is, the positioning boss 51 extends radially along the positioning mandrel 5, and the outer diameter of the positioning boss 51 is larger than the aperture of the crankshaft through hole 13 of the core punch 1. The positioning boss 51 is used to support the core punch 1, so that there is space between the lower end of the core punch 1 and the bottom of the lower die cavity to form the baffle structure 21 of the second baffle member 2, and the first through hole 211 on the baffle structure 21 corresponds to the positioning boss 51. For example, the positioning mandrel 5 can extend from the bottom of the lower die cavity to the top of the upper die cavity, and the top of the upper die cavity can be provided with a groove corresponding to the positioning mandrel 5 for the positioning mandrel 5 to be inserted. In other embodiments, the positioning mandrel 5 can also only extend into the cavity without being inserted into the cavity wall of the upper die cavity.

[0048] Preferably, a circumferential positioning structure 6 is provided on the parting surface of the upper casting mold 3 and the lower casting mold 4. Figure 6 As shown, the circumferential positioning structure 6 may include a positioning column arranged on the parting surface of the lower casting mold 4 and a positioning groove arranged on the parting surface of the upper casting mold 3. When the molds are closed, the positioning column is inserted into the positioning groove, so as to realize the circumferential positioning of the upper casting mold 3 and the lower casting mold 4. Preferably, for example, a positioning blind hole can be arranged on the core punching sheet 1, and a positioning protrusion is arranged in the upper mold cavity accordingly. When the molds are closed, the positioning protrusion is inserted into the positioning blind hole to realize the circumferential positioning of the core punching sheet 1, so that the axial channel 11 on the core punching sheet 1 is aligned with the pouring hole 31 on the upper casting mold 3. It can be understood that when a machine is used to cast molten metal, the position of the pouring port is often certain, so the pouring hole 31 needs to be circumferentially positioned, that is, the upper casting mold 3 needs to be circumferentially positioned, and the setting of the circumferential positioning structure 6 meets this requirement.

[0049] The present invention also provides a compressor, which has the compressor rotor as described above.

[0050] The manufacturing method of the compressor rotor of the present invention mainly comprises:

[0051] 1. Punch out the core sheet 1;

[0052] 2. Preheat the core punching sheet, the heating temperature should not be higher than 420 degrees;

[0053] 3. Install the heated core punching sheet 1 in the cavity between the upper casting mold 3 and the lower casting mold 4;

[0054] 4. Pour aluminum liquid through the pouring hole 31 of the upper casting mold, and the molten metal fills the space between the bottom of the lower mold cavity and the core punching sheet 1, the axial channel 11 and the pouring hole 31;

[0055] 5. After the aluminum liquid solidifies, separate the upper casting mold 3 and the lower casting mold 4, and take out the core punching sheet 1 and the second baffle member 2. Figure 1 ;

[0056] 6. After the fixed core punching sheet 1 cools down, insert the magnet;

[0057] 7. Put the first baffle member on the riveted portion 222, and then deform the riveted portion 222 through the riveting extrusion force to fix it.

[0058] It should be noted that references to "one embodiment", "an embodiment", "a specific embodiment", "some embodiments", etc. in the specification only indicate that the described embodiment may include a particular feature, structure or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment. In addition, when a particular feature, structure or characteristic is described in conjunction with an embodiment, whether or not explicitly described, it is within the knowledge of a person skilled in the relevant art to implement such feature, structure or characteristic in conjunction with other embodiments.

[0059] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0060] It should also be noted that, although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the technical content disclosed above can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

[0061] It should also be understood that, unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are merely used to distinguish between the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements, steps, etc.

[0062] It should also be recognized that the terms described herein are only used to describe specific embodiments and are not intended to limit the scope of the invention. It should be noted that the singular forms "a" and "an" used herein and in the appended claims include plural references unless the context clearly indicates otherwise. For example, a reference to "a step" or "a device" means a reference to one or more steps or devices, and may include secondary steps and secondary devices. All conjunctions used should be understood in the broadest sense. And, the word "or" should be understood to have the definition of a logical "or", rather than a logical "exclusive or", unless the context clearly indicates otherwise. In addition, the implementation of the method and / or device in the embodiments of the present invention may include performing the selected task manually, automatically, or in combination.

Claims

1. A compressor rotor, characterized in that: include: An iron core punching sheet, wherein a plurality of axial channels and a plurality of magnet slots are provided in the iron core punching sheet; A plurality of magnets, each of the magnets corresponds to the magnet slots one by one and is located in the magnet slots; A second baffle member, the second baffle member includes a baffle structure and a plurality of connecting structures, the baffle structure is located at an axial end after a plurality of the core punching sheets are stacked, the connecting structure corresponds to the axial channel one by one, one end of the connecting structure is connected to the baffle structure, and the other end of the connecting structure passes through and extends out of the axial channel to form an end portion with an outer diameter greater than an inner diameter of the axial channel, thereby fixing a plurality of the core punching sheets between the end portion and the baffle structure.

2. The compressor rotor according to claim 1, characterized in that The compressor rotor includes a first baffle member, which is located at the other axial end of the plurality of core punching sheets and covers the notch of the magnet slot; the connecting structure includes a connecting portion and a riveted portion, the riveted portion is the end portion of the other end of the connecting structure, one end of the connecting portion is connected to the baffle structure, and the other end is connected to the riveted portion, and the connecting portion is riveted to the first baffle member through the riveted portion.

3. The compressor rotor according to claim 1, characterized in that The second baffle member includes a balancing block, which is integrally formed with the baffle structure and protrudes from a side of the baffle structure away from the core punching sheet.

4. The compressor rotor according to claim 1, characterized in that An axial crankshaft through hole and a plurality of coolant through holes are arranged in the core punching sheet.

5. The compressor rotor according to claim 4, characterized in that The baffle structure is provided with a first through hole extending along the axial direction of the iron core punching sheet, the first through hole is communicated with the crankshaft through hole, and the aperture of the first through hole is larger than the aperture of the crankshaft through hole.

6. A compressor rotor mold, used for molding the compressor rotor as claimed in any one of claims 4 to 5, characterized in that: include: An upper casting mold having an upper mold cavity, wherein a plurality of pouring holes are arranged on the upper casting mold, and the pouring holes correspond to and communicate with the axial channels of the core punching sheets one by one; A lower casting mold, which has a lower mold cavity, wherein the upper mold cavity and the lower mold cavity are combined to form a cavity, wherein the cavity is used to place a plurality of the core punching sheets to form the compressor rotor, and the space between the cavity bottom of the lower mold cavity and the core punching sheets is used to form the baffle structure of the second baffle member; A positioning mandrel is used to position the core punch in the cavity, and the positioning mandrel extends from the bottom of the lower die cavity to the upper die cavity.

7. The compressor rotor mold according to claim 6, characterized in that: The positioning core shaft is located at one end of the bottom of the lower mold cavity and is provided with a radially extending positioning boss, the outer diameter of the positioning boss is larger than the aperture of the crankshaft through hole of the core punching sheet, and the positioning boss is used to support the core punching sheet.

8. The compressor rotor mold according to claim 7, characterized in that: The diameter of the pouring hole is larger than the inner diameter of the axial channel.

9. A method for manufacturing a compressor rotor, the method using the compressor rotor mold according to any one of claims 6 to 8, characterized in that: The method comprises: Stacking a plurality of the core punching sheets and installing them in the cavity between the upper casting mold and the lower casting mold; The molten metal is poured through the pouring hole of the upper casting mold, and the molten metal fills the space between the bottom of the lower mold cavity and the core punching sheet, the axial channel and the pouring hole; After the molten metal solidifies to form the second baffle member, a number of the core punching sheets are fixed, the upper casting mold and the lower casting mold are separated, and the core punching sheets and the second baffle member are taken out.

10. A compressor, characterized in that: The compressor has a compressor rotor as claimed in any one of claims 1 to 5.

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