Rotor assembly structure, motor and compressor

Abstract

The present invention provides a rotor assembly structure, a motor and a compressor, which relate to the technical field of refrigeration devices, and solve the technical problem that the conventional rotor assembly structure in the prior art makes the cooling effect of the refrigerant on the rotor assembly relatively poor. The rotor assembly structure includes a rotor core and a flow hole, wherein the rotor core is provided with a flow hole and the flow hole is spiral, and part of the refrigerant can flow from the bottom of the rotor core to the top of the rotor core along the flow hole. The present invention is used to reduce the temperature of the compressor and the amount of oil discharged.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration devices, and in particular to a rotor assembly structure, a motor provided with the rotor assembly structure, and a compressor provided with the rotor assembly structure. Background Art

[0002] The motor of a rotary compressor directly drives the rotary piston to rotate to complete the compression of the refrigerant vapor. The structure of the compressor is as follows: the motor stator is fixed on the compressor housing, and the motor rotor is fixed on the crankshaft. When the motor of the compressor is powered on, the rotor rotates, which in turn drives the crankshaft to rotate. The crankshaft drives the piston in the cylinder to rotate to compress the refrigerant in the cylinder. The compressed refrigerant can be discharged through the exhaust hole on the bearing and enter the muffler. Then, it is discharged from the exhaust port of the muffler into the space between the motor and the compressor housing, and finally discharged from the exhaust pipe of the compressor.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] When the refrigerant (including refrigerant oil) flows from the bottom of the motor to the top of the motor, the gap between the motor and the casing serves as the main flow channel; when the rotor assembly in the air-conditioning compressor is working, if the temperature of the rotor is too high, it may cause the rotor magnet to demagnetize and reduce the motor performance. Since very little refrigerant (including refrigerant oil) flows through the rotor to the top of the motor, the refrigerant has a relatively poor cooling effect on the rotor. Summary of the invention

[0005] The purpose of the present invention is to provide a rotor assembly structure, a motor and a compressor, which solves the technical problem that the conventional rotor assembly structure in the prior art makes the cooling effect of the refrigerant on the rotor assembly relatively poor. The various technical effects that can be produced by the preferred technical solution among the various technical solutions provided by the present invention are described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a rotor assembly structure, including a rotor core and a circulation hole, wherein the rotor core is provided with a circulation hole and the circulation hole is spiral-shaped, and part of the refrigerant can flow along the circulation hole from the bottom of the rotor core to the top of the rotor core.

[0008] Furthermore, the rotor core includes rotor punchings, and the rotor punchings are provided with punching flow holes. When the rotor punchings are stacked to form the rotor core, all the punching flow holes form the flow hole.

[0009] Furthermore, the rotor assembly structure also includes an oil deflector cap, which is arranged at one end of the rotor core. The refrigerant flowing out of the flow hole can flow to the oil deflector cap and can flow to the side away from the compressor exhaust port through the groove on the oil deflector cap.

[0010] Furthermore, the oil baffle cap includes a connecting portion and a first oil baffle portion, one end of the connecting portion extends into the first oil baffle portion, and the other end is detachably connected to the balance block of the rotor assembly structure, and there is a notch between the first oil baffle portion and the connecting portion, so that the refrigerant flowing out of the flow hole can flow to the first oil baffle portion and can flow out of the oil baffle cap through the notch and the gap between the connecting portion and the first oil baffle portion.

[0011] Furthermore, the outer contour of the first oil-blocking portion is annular and the longitudinal cross-section of the first oil-blocking portion is arc-shaped.

[0012] Furthermore, the outer contour of the connecting part is in the shape of a circular ring, the connecting part extends into the upper edge of the first oil baffle part and is connected to the first oil baffle part, the upper edge of the connecting part is provided with the notch, and an oil guiding gap connected to the notch is formed between the outer side surface of the connecting part and the inner side surface of the first oil baffle part.

[0013] Furthermore, the inner side surface of the first oil baffle portion includes a top oil baffle surface and a side oil baffle surface connected to the top oil baffle surface, the top oil baffle surface and the side oil baffle surface are both annular, the longitudinal cross-sectional shape of the top oil baffle surface is an arc and the top oil baffle surface is located above the connecting portion, the longitudinal cross-sectional shape of the side oil baffle surface is a straight line and the side oil baffle surface forms the outer side surface of the oil guide gap.

[0014] Furthermore, an outer side surface of the connecting portion used to form the oil guiding gap intersects with an inner side surface of the connecting portion to form an upper end edge of the connecting portion.

[0015] Furthermore, the notches are evenly spaced apart along the circumferential direction of the connecting portion.

[0016] Furthermore, a thread for connecting with the balancing weight is provided on the inner side surface of the connecting portion.

[0017] Furthermore, a second oil baffle is provided on one end of the first oil baffle arranged around the outer side of the connecting portion to limit the direction of the refrigerating oil, and the refrigerating oil can flow out through the gap between the second oil baffle and the outer side surface of the connecting portion.

[0018] Furthermore, the second oil baffle portion is an annular structure, and the second oil baffle portion includes an intermediate baffle portion, the intermediate baffle portion is a cylindrical structure, one end of the intermediate baffle portion is connected to the first oil baffle portion through an arc-shaped baffle portion, and the other end extends toward the direction close to the connecting portion to form an annular baffle closing portion.

[0019] Furthermore, the rotor assembly structure also includes an oil deflector cap and a balancing block, wherein the balancing block is connected to the rotor core, and the oil deflector cap is threadedly connected to the balancing block.

[0020] Furthermore, the balancing block includes a threaded connection portion and a balancing portion, the threaded connection portion connects the rotor core and the balancing portion, the threaded connection portion is a circular ring structure and a thread is arranged on the circumferential outer side surface of the threaded connection portion.

[0021] A motor comprises the rotor assembly structure.

[0022] A compressor comprises the rotor assembly structure.

[0023] The present invention provides a rotor assembly structure, in which a flow hole is provided on the rotor core and the flow hole is spiral. Part of the refrigerant can flow along the flow hole from the bottom of the rotor core to the top of the rotor core. Since the refrigerant contains refrigerant oil, the refrigerant oil can flow in the flow hole to cool the rotor core, thereby solving the technical problem in the prior art that the traditional rotor assembly structure makes the cooling effect of the refrigerant on the rotor assembly relatively poor.

[0024] The preferred technical solution of the present invention can at least produce the following technical effects:

[0025] The rotor assembly structure also includes an oil retaining cap, which is arranged at one end of the rotor core. The oil retaining cap effectively prevents a large amount of refrigeration oil from flowing out of the compressor through the compressor exhaust port along with the refrigerant, thereby preventing the oil content of the compressor from decreasing.

[0026] The oil baffle is arranged on one end of the outer side of the connecting part to limit the direction of the refrigeration oil. The oil baffle can effectively prevent the oil from spilling out at will. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1is a schematic structural diagram of a flow hole on a rotor core provided by an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of the structure of a rotor punching provided by an embodiment of the present invention;

[0030] Figure 3 is a schematic cross-sectional view of a rotor assembly structure provided by an embodiment of the present invention;

[0031] Figure 4 is a schematic diagram of the cross-sectional structure of an oil deflector cap provided by an embodiment of the present invention;

[0032] Figure 5 is a schematic structural diagram of the notch on the oil deflector cap provided in an embodiment of the present invention;

[0033] Figure 6 is a schematic structural diagram of an oil deflector cap provided by an embodiment of the present invention;

[0034] Figure 7 It is a cross-sectional schematic diagram of a balancing weight provided in an embodiment of the present invention.

[0035] In the figure, 1-rotor core; 11-rotor punching sheet; 12-punching sheet flow hole; 2-flow hole; 3-connecting part; 4-first oil baffle part; 41-top oil baffle surface; 42-side oil baffle surface; 43-avoidance part; 5-slot; 6-oil guide gap; 7-balancing block; 71-threaded connecting part; 72-balancing part; 8-second oil baffle part; 81-middle baffle part; 82-arc baffle part; 83-baffle closing part. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0037] See also Figure 1-Figure 7The present invention provides a rotor assembly structure, including a rotor core 1 and a flow hole 2, wherein the rotor core 1 is provided with the flow hole 2 and the flow hole 2 is spiral, and part of the refrigerant can flow along the flow hole 2 from the bottom of the rotor core 1 to the top of the rotor core 1. The rotor assembly structure provided by the present invention can be installed in a compressor. When the compressor is running, the refrigerant will flow in the flow hole 2. Since the refrigerant contains refrigerant oil, the refrigerant oil can flow in the flow hole 2 to achieve the effect of cooling the rotor core 1, and has a certain preventive effect on the demagnetization of the magnetic steel of the rotor core 1 due to excessive temperature; the opening of the flow hole 2 reduces the refrigerant resistance to a certain extent, and can speed up the flow frequency of the refrigerant oil, thereby achieving a cooling effect. See Figure 1 The flow hole 2 can be spiral, and the number of spiral turns can be multiple. The more spiral turns the flow hole 2 has, the better the cooling effect is. In addition, the flow hole 2 also has the effect of reducing motor noise to a certain extent.

[0038] As an optional implementation method of the present invention, see Figure 1-Figure 3 The rotor core 1 includes a rotor punching 11, on which a punching flow hole 12 is provided. When the rotor punchings 11 are stacked to form the rotor core 1, the punching flow holes 12 on two adjacent rotor punchings 11 are staggered from each other, so that the stacked punching flow holes 12 finally form a flow hole 2.

[0039] As an optional implementation method of the present invention, see Figure 3-Figure 6 The rotor assembly structure also includes an oil baffle cap, which is arranged at one end of the rotor core 1. The refrigerant flowing out of the flow hole 2 can flow to the oil baffle cap and can flow to the side away from the compressor exhaust port through the notch 5 on the oil baffle cap. The oil baffle cap effectively prevents a large amount of refrigeration oil from flowing out of the compressor through the compressor exhaust port along with the refrigerant, thereby preventing the oil content of the compressor from decreasing.

[0040] As an optional implementation method of the present invention, the structure of the oil deflector cap can be as follows: Figure 3-Figure 6 The oil retaining cap includes a connecting portion 3 and a first oil retaining portion 4. One end of the connecting portion 3 extends into the first oil retaining portion 4, and the other end is detachably connected to the balance block 7 of the rotor assembly structure. There is a notch 5 between the first oil retaining portion 4 and the connecting portion 3. The refrigerant flowing out of the flow hole 2 can flow to the first oil retaining portion 4 and can flow out of the oil retaining cap through the notch 5 and the gap between the connecting portion 3 and the first oil retaining portion 4. Since the flow hole 2 is a spiral structure, the refrigerant oil will generate a rotational motion when it is thrown onto the first oil retaining portion 4 by the principle of inertia, and the refrigerant oil can be cooled in this process; the refrigerant oil can flow back to the compressor through the notch 5 and the gap between the connecting portion 3 and the first oil retaining portion 4 to cool the whole machine for the second time.

[0041] As an optional implementation method of the present invention, see Figure 3-Figure 6 The outer contour of the first oil-blocking portion 4 may be annular and the longitudinal cross-section of the first oil-blocking portion 4 may be arc-shaped; the outer contour of the connecting portion 3 is annular, the connecting portion 3 extends into the upper edge of the first oil-blocking portion 4 and is connected to the first oil-blocking portion 4, a notch 5 is provided on the upper edge of the connecting portion 3, the notches 5 may be evenly spaced along the circumferential direction of the connecting portion 3, the number of the notches 5 may be 6, and an oil-conducting gap 6 connected to the notch 5 is formed between the outer side surface of the connecting portion 3 and the inner side surface of the first oil-blocking portion 4. In addition, see Figure 5 The first oil baffle portion 4 may also be provided with an avoidance portion 43 to match the notch 5 on the connecting portion 3 .

[0042] As an optional implementation method of the present invention, the specific structure of the first oil baffle 4 can be as follows: Figure 4 The inner side surface of the first oil baffle portion 4 includes a top oil baffle surface 41 and a side oil baffle surface 42 connected to the top oil baffle surface 41. The top oil baffle surface 41 and the side oil baffle surface 42 are both annular. The longitudinal section of the top oil baffle surface 41 is an arc and the top oil baffle surface 41 is located above the connecting portion 3. When the refrigerant oil is thrown onto the top oil baffle surface 41 by the principle of inertia, a rotational motion will be generated. The longitudinal section of the side oil baffle surface 42 is a straight line and the side oil baffle surface 42 forms the outer side surface of the oil guide gap 6.

[0043] As an optional implementation mode of the embodiment of the present invention, the specific structure of the connecting part 3 can be as follows: Figure 4 The outer side surface of the connecting portion 3 for forming the oil guide gap 6 intersects with the inner side surface of the connecting portion 3 to form the upper edge of the connecting portion 3. Figure 4 The longitudinal section of the outer side surface of the connecting portion 3 for forming the oil guiding gap 6 can be parallel to the longitudinal section of the side oil retaining surface 42 .

[0044] As an optional implementation method of the embodiment of the present invention, the first oil baffle portion 4 is arranged around one end of the outer side of the connecting portion 3 and is provided with a second oil baffle portion 8 for limiting the direction of the refrigerant oil, and the refrigerant oil can flow out through the gap between the second oil baffle portion 8 and the outer side surface of the connecting portion 3. When the refrigerant oil returns to the compressor, the second oil baffle portion 8 can effectively prevent the oil from spilling out at will, and the specific shape of the second oil baffle portion 8 can be as follows: the second oil baffle portion 8 is an annular structure, and the second oil baffle portion 8 includes an intermediate baffle portion 81, which is a cylindrical structure and one end of the intermediate baffle portion 81 is connected to the first oil baffle portion 4 through an arc-shaped baffle portion 82, and the other end extends toward the direction close to the connecting portion 3 to form an annular baffle closing portion 83, and the refrigerant oil can flow out through the gap between the baffle closing portion 83 and the outer side surface of the connecting portion 3.

[0045] As an optional implementation method of the present invention, see Figure 3-Figure 5 , Figure 7The rotor assembly structure also includes an oil deflector cap and a balancing block 7. The balancing block 7 is connected to the rotor core 1. The balancing block 7 and the rotor core 1 can be connected by riveting. The oil deflector cap is threadedly connected to the balancing block 7. The balancing block 7 includes a threaded connection portion 71 and a balancing portion 72. The threaded connection portion 71 connects the rotor core 1 and the balancing portion 72. The threaded connection portion 71 is a circular ring structure and a thread is provided on the circumferential outer side surface of the threaded connection portion 71. A thread for connecting to the balancing block 7 is provided on the inner side surface of the oil deflector cap connection portion 3. The threaded connection portion 71 is threadedly connected to the connection portion 3. The balancing portion 72 can be a semi-annular structure.

[0046] A motor is equipped with the rotor assembly structure provided by the present invention.

[0047] A compressor is equipped with the rotor assembly structure provided by the present invention to effectively reduce the oil discharge amount of the compressor.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A rotor assembly structure, characterized in that: It comprises a rotor core (1) and a flow hole (2), wherein: The rotor core (1) is provided with a flow hole (2) and the flow hole (2) is spiral-shaped, so that part of the refrigerant can flow along the flow hole (2) from the bottom of the rotor core (1) to the top of the rotor core (1); The rotor assembly structure also includes an oil deflector cap, which is arranged at one end of the rotor core (1), and the refrigerant flowing out of the flow hole (2) can flow toward the oil deflector cap and can flow through the notch (5) on the oil deflector cap to the side away from the compressor exhaust port; The oil baffle cap comprises a connecting portion (3) and a first oil baffle portion (4), one end of the connecting portion (3) extends into the first oil baffle portion (4), and the other end is detachably connected to a balancing block (7) of the rotor assembly structure, the notch (5) is present between the first oil baffle portion (4) and the connecting portion (3), and the refrigerant flowing out of the flow hole (2) can flow toward the first oil baffle portion (4) and can flow out of the oil baffle cap through the notch (5) and the gap between the connecting portion (3) and the first oil baffle portion (4); The outer contour of the connecting portion (3) is in the shape of a circular ring. The connecting portion (3) extends into the upper edge of the first oil baffle portion (4) and is connected to the first oil baffle portion (4). The upper edge of the connecting portion (3) is provided with the notch (5). An oil guide gap (6) connected to the notch (5) is formed between the outer side surface of the connecting portion (3) and the inner side surface of the first oil baffle portion (4).

2. The rotor assembly structure according to claim 1, characterized in that: The rotor core (1) comprises a rotor punching (11), and the rotor punching (11) is provided with a punching flow hole (12). When the rotor punching (11) is stacked to form the rotor core (1), all the punching flow holes (12) form the flow hole (2).

3. The rotor assembly structure according to claim 1, characterized in that: The outer contour of the first oil baffle portion (4) is in the shape of a circular ring and the longitudinal cross-section of the first oil baffle portion (4) is in the shape of an arc.

4. The rotor assembly structure according to claim 1, characterized in that: The inner side surface of the first oil baffle portion (4) comprises a top oil baffle surface (41) and a side oil baffle surface (42) connected to the top oil baffle surface (41); the top oil baffle surface (41) and the side oil baffle surface (42) are both annular; the longitudinal cross-sectional shape of the top oil baffle surface (41) is an arc and the top oil baffle surface (41) is located above the connecting portion (3); the longitudinal cross-sectional shape of the side oil baffle surface (42) is a straight line and the side oil baffle surface (42) forms the outer side surface of the oil guide gap (6).

5. The rotor assembly structure according to claim 4, characterized in that: The outer side surface of the connecting portion (3) used to form the oil guide gap (6) intersects with the inner side surface of the connecting portion (3) to form the upper end edge of the connecting portion (3).

6. The rotor assembly structure according to claim 1, characterized in that: The notches (5) are evenly spaced and distributed along the circumferential direction of the connecting portion (3).

7. The rotor assembly structure according to claim 1, characterized in that: The inner side surface of the connecting portion (3) is provided with a thread for connecting to the balancing block (7).

8. The rotor assembly structure according to claim 1, characterized in that: The first oil baffle (4) is arranged on one end outside the connecting portion (3) and is provided with a second oil baffle (8) for limiting the direction of the refrigeration oil. The refrigeration oil can flow out through the gap between the second oil baffle (8) and the outer side surface of the connecting portion (3).

9. The rotor assembly structure according to claim 8, characterized in that: The second oil baffle portion (8) is an annular structure, comprising an intermediate baffle portion (81), the intermediate baffle portion (81) being a cylindrical structure, one end of the intermediate baffle portion (81) being connected to the first oil baffle portion (4) via an arc-shaped baffle portion (82), and the other end of the intermediate baffle portion (81) extending in a direction close to the connecting portion (3) to form an annular baffle closing portion (83).

10. The rotor assembly structure according to claim 1 or 7, characterized in that: The rotor assembly structure further comprises an oil deflector cap and a balancing block (7); the balancing block (7) is connected to the rotor core (1); and the oil deflector cap is threadedly connected to the balancing block (7).

11. The rotor assembly structure according to claim 10, characterized in that: The balancing block (7) comprises a threaded connection portion (71) and a balancing portion (72), wherein the threaded connection portion (71) connects the rotor core (1) and the balancing portion (72), and the threaded connection portion (71) is a circular ring structure and a thread is provided on the circumferential outer surface of the threaded connection portion (71).

12. A motor, characterized in that: It comprises the rotor assembly structure described in any one of claims 1-11.

13. A compressor, characterized in that: It comprises the rotor assembly structure described in any one of claims 1-11.

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