Rotor assembly, motor and compressor

Abstract

The utility model provides a rotor assembly, a motor and a compressor. The rotor assembly comprises a rotor iron core, a first balance block and a second balance block. The central axis of the rotor core is located on a preset radial surface; the rotor core is provided with a plurality of circulation holes distributed along the circumferential direction of the rotor core. The first balance block and the second balance block are respectively arranged on two axial end surfaces of the rotor iron core and are respectively positioned on two sides of a preset radial surface; the first balance block is used for being arranged on the side, facing a compressor pump body, of the rotor iron core. And an included angle part is formed on the circumferential surface of the second balance block. By means of the rotor assembly, the oil spitting rate of the compressor can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and in particular, to a rotor assembly, a motor and a compressor. Background Art

[0002] With the upgrading and iteration of air conditioners, the nominal maximum heating capacity and maximum cooling capacity of household air conditioners are gradually increasing. Therefore, higher requirements are put forward for the high-frequency performance and reliability of rotary compressors.

[0003] At present, whether the rotary compressor adopts a lateral exhaust muffler or a direct exhaust muffler structure, there is a problem of insufficient capacity under high-frequency working conditions. The main manifestation is that as the frequency increases, the capacity increases relatively slowly, and it is difficult to meet the system requirements until the exhaust temperature exceeds the operating temperature.

[0004] The root cause is that the miniaturization of the rotary compressor will reduce the diameter of the compressor housing and the flow area of the motor; the high-frequency operation will increase the exhaust gas flow rate of the compressor, and the oil content in the air flow will increase significantly, resulting in the attenuation of the high-frequency operation capacity. The main reason is that under high-frequency refrigeration or heating conditions, the oil discharge rate of the miniaturized compressor increases, resulting in an increase in the oil discharge rate of the compressor. The increase in the oil discharge rate will aggravate the entry of refrigerant oil into the condenser and evaporator, reduce the heat exchange capacity of the air-conditioning system, deteriorate the heat exchange conditions, and the maximum refrigeration or maximum heating capacity cannot meet the system development goals, thereby leading to a decline in the performance of the air-conditioning system. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a rotor assembly, a motor and a compressor to reduce the oil discharge rate of the compressor.

[0006] To achieve the above object, according to one aspect of the utility model, a rotor assembly is provided, which includes: a rotor core having two axially opposite end faces; the central axis of the rotor core is located on a preset radial plane; a plurality of flow holes are arranged on the rotor core in a circumferential distribution; a first balance weight and a second balance weight, the first balance weight and the second balance weight are respectively arranged on the two axially opposite end faces of the rotor core and are respectively located on both sides of the preset radial plane; the first balance weight is used to be arranged on the side of the rotor core facing the compressor pump body; an included angle portion is formed on the circumferential surface of the second balance weight.

[0007] Further, along the extending direction of the second balance block, the second balance block has a first end and a second end; the circumferential surface of the second balance block includes a first end face, a second end face, an inner side and an outer side which are oppositely arranged; the first end face of the second balance block forms an acute angle, a right angle or an obtuse angle with its inner side; and / or the second end face of the second balance block forms an acute angle, a right angle or an obtuse angle with its inner side; and / or the first end face of the second balance block forms an acute angle, a right angle or an obtuse angle with its outer side; and / or the second end face of the second balance block forms an acute angle, a right angle or an obtuse angle with its outer side.

[0008] Further, the outer side of the second balance block is an arc surface.

[0009] Further, the first end face of the second balance block is perpendicular to the preset radial plane.

[0010] Further, the second end face of the second balance block is perpendicular to the preset radial plane.

[0011] Further, the preset symmetry plane is perpendicular to the preset radial plane, and the central axis of the rotor core is located on the preset symmetry plane; the second balance block includes two fourth body parts, and the two fourth body parts are arranged in mirror symmetry with respect to the preset symmetry plane.

[0012] Further, the center line of the preset circle coincides with the central axis of the rotor core; the diameter of the preset circle is smaller than the diameter of the rotor core; the second balance block is located outside the preset circle; the first tangent line is a tangent line of the preset circle, and the first tangent line is parallel to the first end face of the second balance block; the perpendicular distance between the first tangent line and the first end face of the second balance block is L 1 , L 1 excluding the diameter of the preset circle, L 1 ranges from 3 mm to 7 mm.

[0013] Further, the second tangent line is a tangent line of the preset circle, and the second tangent line is parallel to the second end face of the second balance block; the perpendicular distance between the second tangent line and the second end face of the second balance block is L 2 , L 2 excluding the diameter of the preset circle, L 2 ranges from 3 mm to 7 mm.

[0014] Further, the center line of the preset circle coincides with the central axis of the rotor core; the diameter of the preset circle is smaller than the diameter of the rotor core; multiple flow holes are all located within the preset circle; the first balance block and the second balance block are both located outside the preset circle.

[0015] Further, the circumferential surface of the first balance block includes an inner side and an outer side; the inner side of the first balance block includes a first arc surface, and the central axis of the first arc surface coincides with the central axis of the rotor core; the difference between the radius of the first arc surface and the radius of the preset circle is r 1 , r 1 ranges from 1 mm to 3 mm.

[0016] Further, the outer side of the first balance block includes a second arc surface, and the central axis of the second arc surface coincides with the central axis of the rotor core; the difference between the radius of the rotor core and the radius of the second arc surface is r 2 , r 2 ranges from 1 mm to 3 mm.

[0017] Further, the central line of the preset circle coincides with the central axis of the rotor core; the diameter of the preset circle is smaller than the diameter of the rotor core; multiple flow holes are all located within the preset circle; each flow hole is tangent to the preset circle.

[0018] Further, the number of flow holes is an even number.

[0019] Further, the multiple flow holes are evenly distributed along the circumferential direction of the rotor core.

[0020] Further, the flow hole is a circular hole; or, the flow hole has an inner side wall and an outer side wall, and both the inner side wall and the outer side wall of the flow hole are arc surfaces; the central axis of the inner side wall of the flow hole coincides with the central axis of the rotor core, and the central axis of the outer side wall of the flow hole coincides with the central axis of the rotor core.

[0021] Further, the circumferential surface of the first balance block is an overall smooth solid.

[0022] Further, along the circumferential direction of the rotor core, the first balance block includes a second body part, a main body part, and a third body part that are sequentially connected; one end of the second body part away from the main body part is a free end, and one end of the third body part away from the main body part is a free end; in the direction from the free end of the second body part to its connection end, the width of the second body part gradually increases; and / or, in the direction from the free end of the third body part to its connection end, the width of the third body part gradually increases.

[0023] Further, the preset symmetry plane is perpendicular to the preset radial plane, and the central axis of the rotor core is located on the preset symmetry plane; the first balance block includes two first body parts, and the two first body parts are mirror-symmetric with respect to the preset symmetry plane.

[0024] Further, the circumferential surface of the first balance block includes an inner side and an outer side; the inner side of the first balance block includes a first arc surface, and the central axis of the first arc surface coincides with the central axis of the rotor core; the outer side of the first balance block includes a second arc surface, and the central axis of the second arc surface coincides with the central axis of the rotor core.

[0025] Further, the preset symmetry plane is perpendicular to the preset radial plane, and the central axis of the rotor core is located on the preset symmetry plane; the first balance block includes two first body parts, and the two first body parts are arranged in mirror symmetry with respect to the preset symmetry plane; the second balance block includes two fourth body parts, and the two fourth body parts are arranged in mirror symmetry with respect to the preset symmetry plane; the plurality of flow holes includes a preset flow hole group, and the preset flow hole group includes two flow holes; the two flow holes of the preset flow hole group are respectively located on both sides of the preset radial plane; the preset symmetry plane divides each flow hole of the preset flow hole group into two hole parts arranged in mirror symmetry with respect to the preset symmetry plane.

[0026] According to another aspect of the present invention, there is provided a motor, which includes a stator assembly and the above-mentioned rotor assembly.

[0027] Further, the flow area of the rotor core of the rotor assembly is S 1 , the flow area of the rotor core includes the flow areas of a plurality of flow holes on the rotor core; the total flow area of the motor is S; K = S 1 / S, and the value range of K is from 0.13 to 0.3.

[0028] According to still another aspect of the present invention, there is provided a compressor, which includes the above-mentioned motor.

[0029] Applying the technical solution of the present invention, the rotor assembly includes a rotor core, a first balance block and a second balance block; along the axial direction of the rotor core, the rotor core has two axially opposite end faces; the central axis of the rotor core is located on the preset radial plane; a plurality of flow holes distributed along the circumferential direction of the rotor core are provided on the rotor core; the first balance block and the second balance block are respectively arranged on the two axially opposite end faces of the rotor core, and the first balance block and the second balance block are respectively located on both sides of the preset radial plane.

[0030] The first balance block is used to be arranged on the side of the rotor core facing the compressor pump body, and the second balance block is used to be arranged on the side of the rotor core facing the compressor upper cover; that is, the first balance block is arranged on the lower axial end face of the rotor core, and the second balance block is arranged on the upper axial end face of the rotor core. An included angle part is formed on the circumferential surface of the second balance block.

[0031] The refrigerant within the compressor flows through the flow holes in the direction from the compressor pump body to the compressor upper cover. By forming an angled portion on the circumferential surface of the second balance weight, the two planar portions forming the angled portion contribute to separating the refrigerant gas containing oil droplets, that is, the two planar portions can act like a cutting function, thereby improving the separation effect of the oil droplets from the refrigerant gas, reducing the oil carry - over rate in the refrigerant gas, and lowering the oil discharge rate of the compressor. It can be seen that adopting the rotor assembly of the present application is beneficial to reducing the oil discharge rate of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The schematic diagrams in the specification forming a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0033] Figure 1 Shows a schematic structural diagram of a compressor according to the present utility model;

[0034] Figure 2 Shows a schematic structural diagram of a rotor assembly according to the present utility model;

[0035] Figure 3 Shows Figure 2 a bottom view of the rotor assembly in

[0036] Figure 4 Shows a schematic structural diagram of the first balance weight of the rotor assembly according to the present utility model;

[0037] Figure 5 Shows Figure 2 a top view of the rotor assembly in

[0038] Figure 6 Shows a schematic diagram of the relative position of the second balance weight of the rotor assembly according to the present utility model and a preset circle;

[0039] Figure 7 Shows a schematic structural diagram of the second balance weight of the rotor assembly according to the present utility model;

[0040] Figure 8 Shows a schematic diagram of the distribution structure of multiple flow holes of the rotor assembly according to the present utility model;

[0041] Figure 9 Shows a schematic diagram of the structure of the flow hole of the rotor assembly according to the present utility model;

[0042] Figure 10 Shows a schematic structural diagram of the stator assembly of the compressor according to the present utility model;

[0043] Figure 11The structural schematic diagram of the motor of the compressor according to the present utility model is shown.

[0044] Among them, the above-mentioned drawings include the following reference numerals:

[0045] 100, rotor assembly; 10, rotor core; 101, circulation hole; 1011, inner side wall; 1012, outer side wall; 1013, transition arc surface;

[0046] 11, first balance block; 111, first inner side; 1111, first arc surface; 112, first outer side; 1121, second arc surface; 113, second body part; 114, main body part; 115, third body part; 116, first body part;

[0047] 12, second balance block; 121, included angle part; 1211, plane body part; 1212, inner side; 1213, outer side; 1214, first end face; 1215, second end face; 1216, fourth body part;

[0048] 131, first locking member; 132, second locking member;

[0049] 20, preset radial plane; 21, preset symmetry plane; 22, preset circle; 221, first tangent line; 222, second tangent line;

[0050] 30, stator assembly; 31, winding; 32, stator wire package gap; 33, cutting surface part; 34, cutting surface gap; 35, stator core; 36, insulating member; 37, lead-out wire assembly; 38, preset gap;

[0051] 40, housing; 41, upper cover assembly; 42, liquid distributor assembly; 43, lower cover; 44, pump body assembly; 45, housing assembly; 46, oil sump. Detailed implementation manners

[0052] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0053] It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further descriptions of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] The present utility model provides a rotor assembly 100. Please refer to Figures 1 to 11 , the rotor assembly 100 includes a rotor core 10, a first balance weight 11, and a second balance weight 12; along the axial direction of the rotor core 10, the rotor core 10 has two axially opposite end faces; the central axis of the rotor core 10 is located on a preset radial plane 20; a plurality of flow holes 101 are provided on the rotor core 10 and are distributed along its circumferential direction; the first balance weight 11 and the second balance weight 12 are respectively provided on the two axially opposite end faces of the rotor core 10, and the first balance weight 11 and the second balance weight 12 are respectively located on both sides of the preset radial plane 20.

[0056] The flow hole 101 is a through hole that axially penetrates the rotor core 10 along the axial direction of the rotor core 10.

[0057] The first balance weight 11 is used to be provided on one side of the rotor core 10 facing the compressor pump body, and the second balance weight 12 is used to be provided on one side of the rotor core 10 facing the compressor upper cover; that is, the first balance weight 11 is provided on the lower axial end face of the rotor core 10, and the second balance weight 12 is provided on the upper axial end face of the rotor core 10. An included angle portion 121 is formed on the circumferential surface of the second balance weight 12.

[0058] In the specific implementation process, the refrigerant in the compressor flows through the flow holes 101 in the direction from the compressor pump body to the compressor upper cover (i.e., the direction from bottom to top); by forming the included angle portion 121 on the circumferential surface of the second balance weight 12, the two surface portions 1211 forming the included angle portion 121 contribute to the separation of the refrigerant gas containing oil droplets, that is, the two surface portions 1211 can play a role similar to cutting, thereby improving the separation effect of the oil droplets from the refrigerant gas, reducing the oil carry-over rate in the refrigerant gas, and reducing the oil discharge rate of the compressor. It can be seen that adopting the rotor assembly 100 of the present application is beneficial to reducing the oil discharge rate of the compressor.

[0059] It should be noted that the axis surrounded by the circumferential surface of the first balance weight 11 is parallel to the central axis of the rotor core 10, and the axis surrounded by the circumferential surface of the second balance weight 12 is parallel to the central axis of the rotor core 10.

[0060] In this embodiment, along the extending direction of the second balance block 12, the second balance block 12 has a first end and a second end; the circumferential surface of the second balance block 12 includes an inner side, an outer side, a first end face and a second end face; the inner side and the outer side of the second balance block 12 are oppositely arranged.

[0061] In Figure 7 , the second inner side 1212 is the inner side of the second balance block 12, the second outer side 1213 is the outer side of the second balance block 12, the first end face 1214 is the first end face of the second balance block 12, and the second end face 1215 is the second end face of the second balance block 12.

[0062] Optionally, the first end face and the second end face of the second balance block 12 are oppositely arranged, and the distribution direction of the first end face and the second end face of the second balance block 12 is perpendicular to the distribution direction of the inner side and the outer side of the second balance block 12.

[0063] Specifically, the first end face of the second balance block 12 is arranged at an acute angle, or a right angle, or an obtuse angle with its inner side, so as to form an included angle portion 121 between the first end face of the second balance block 12 and its inner side. That is, the included angle between the first end face of the second balance block 12 and its inner side is an acute angle, or a right angle, or an obtuse angle.

[0064] Specifically, the second end face of the second balance block 12 is arranged at an acute angle, or a right angle, or an obtuse angle with its inner side, so as to form an included angle portion 121 between the second end face of the second balance block 12 and its inner side. That is, the included angle between the second end face of the second balance block 12 and its inner side is an acute angle, or a right angle, or an obtuse angle.

[0065] Specifically, the first end face of the second balance block 12 is arranged at an acute angle, or a right angle, or an obtuse angle with its outer side, so as to form an included angle portion 121 between the first end face of the second balance block 12 and its outer side. That is, the included angle between the first end face of the second balance block 12 and its outer side is an acute angle, or a right angle, or an obtuse angle.

[0066] Specifically, the second end face of the second balance block 12 is arranged at an acute angle, or a right angle, or an obtuse angle with its outer side, so as to form an included angle portion 121 between the second end face of the second balance block 12 and its outer side. That is, the included angle between the second end face of the second balance block 12 and its outer side is an acute angle, or a right angle, or an obtuse angle.

[0067] In Figure 7 , the included angle between the second inner side 1212 and the first end face 1214 is 90 degrees, the included angle between the second inner side 1212 and the second end face 1215 is 90 degrees, the included angle between the second outer side 1213 and the first end face 1214 is an obtuse angle, and the included angle between the second outer side 1213 and the second end face 1215 is an obtuse angle.

[0068] Optionally, the outer side edge of the second balance block 12 is an arc surface; further, the central axis of the outer side edge of the second balance block 12 coincides with the central axis of the rotor core 10.

[0069] Optionally, the first end face of the second balance block 12 is perpendicular to the preset radial plane 20.

[0070] Optionally, the second end face of the second balance block 12 is perpendicular to the preset radial plane 20.

[0071] Optionally, the first end face of the second balance block 12 and the second end face of the second balance block 12 are parallel.

[0072] In this embodiment, the preset symmetry plane 21 is perpendicular to the preset radial plane 20, and the central axis of the rotor core 10 is located on the preset symmetry plane 21; the second balance block 12 includes two fourth body parts 1216, and the two fourth body parts 1216 are arranged symmetrically with respect to the preset symmetry plane 21 in a mirror image manner.

[0073] Specifically, the first end face and the second end face of the second balance block 12 are respectively located on the two fourth body parts 1216.

[0074] In this embodiment, the center line of the preset circle 22 coincides with the central axis of the rotor core 10; the diameter of the preset circle 22 is smaller than the diameter of the rotor core 10; the second balance block 12 is located outside the preset circle 22.

[0075] Specifically, the first tangent line 221 is a tangent line of the preset circle 22, and the first tangent line 221 is parallel to the first end face of the second balance block 12; the perpendicular distance between the first tangent line 221 and the first end face of the second balance block 12 is L 1 , L 1 excluding the diameter of the preset circle 22, L 1 ranges from 3 mm to 7 mm.

[0076] Specifically, the second tangent line 222 is a tangent line of the preset circle 22, and the second tangent line 222 is parallel to the second end face of the second balance block 12; the perpendicular distance between the second tangent line 222 and the second end face of the second balance block 12 is L 2 , L 2 excluding the diameter of the preset circle 22, L 2 ranges from 3 mm to 7 mm.

[0077] Optionally, when the first end face of the second balance block 12 and the second end face of the second balance block 12 are parallel, the first tangent line 221 and the second tangent line 222 are parallel.

[0078] Optionally, when the two fourth body parts 1216 are arranged symmetrically with respect to the preset symmetry plane 21 in a mirror image manner, L1 Equal to L 2 Equal.

[0079] In this embodiment, a plurality of flow holes 101 are all located within a preset circle 22; the first balance block 11 and the second balance block 12 are both located outside the preset circle 22; along the radial direction of the rotor core 10, the first balance block 11 and the second balance block 12 are both located inside the outer peripheral surface of the rotor core 10.

[0080] In this embodiment, the circumferential surface of the first balance block 11 includes an inner side and an outer side. In Figure 4 , the first inner side 111 is the inner side of the first balance block 11, and the first outer side 112 is the outer side of the first balance block 11.

[0081] In this embodiment, the inner side of the first balance block 11 includes a first arc surface 1111, and the central axis of the first arc surface 1111 coincides with the central axis of the rotor core 10; the difference between the radius of the first arc surface 1111 and the radius of the preset circle 22 is r 1 , r 1 The value range of r is from 1 mm to 3 mm.

[0082] In this embodiment, the outer side of the first balance block 11 includes a second arc surface 1121, and the central axis of the second arc surface 1121 coincides with the central axis of the rotor core 10; the difference between the radius of the rotor core 10 and the radius of the second arc surface 1121 is r 2 , r 2 The value range of r is from 1 mm to 3 mm.

[0083] In this embodiment, each flow hole 101 is tangentially arranged with the preset circle 22.

[0084] In this embodiment, the number of the flow holes 101 is an even number. For example, the number of the flow holes 101 is 4, or 6, or 8.

[0085] In this embodiment, a plurality of flow holes 101 are evenly distributed along the circumferential direction of the rotor core 10.

[0086] In this embodiment, the first setting shape of the flow hole 101 is: the flow hole 101 is a circular hole.

[0087] In this embodiment, the second setting shape of the flow hole 101 is: the flow hole 101 has an inner side wall and an outer side wall, and both the inner side wall and the outer side wall of the flow hole 101 are arc surfaces; the central axis of the inner side wall of the flow hole 101 coincides with the central axis of the rotor core 10, and the central axis of the outer side wall of the flow hole 101 coincides with the central axis of the rotor core 10.

[0088] In Figure 9Among them, the inner wall 1011 is the inner wall of the flow hole 101, and the outer wall 1012 is the outer wall of the flow hole 101.

[0089] Specifically, the outer wall of the flow hole 101 is tangent to the preset circle 22.

[0090] Optionally, the outer wall and the inner wall of the flow hole 101 are connected by a transition arc surface 1013.

[0091] In this embodiment, the circumferential surface of the first balance block 11 is a smooth polyhedron as a whole. By making the circumferential surface of the first balance block 11 a smooth polyhedron as a whole, the resistance to the refrigerant airflow can be reduced, thereby reducing the influence on the refrigerant airflow pressure.

[0092] Specifically, along the circumference of the rotor core 10, the first balance block 11 includes a second body portion 113, a main body portion 114, and a third body portion 115 that are connected in sequence; one end of the second body portion 113 away from the main body portion 114 is a free end, and one end of the third body portion 115 away from the main body portion 114 is a free end.

[0093] Specifically, in the direction from the free end of the second body portion 113 to its connection end, the width of the second body portion 113 gradually increases. Optionally, the free end of the second body portion 113 is a sharp corner structure. Preferably, the free end of the second body portion 113 is a streamlined sharp corner structure.

[0094] Specifically, in the direction from the free end of the third body portion 115 to its connection end, the width of the third body portion 115 gradually increases. Optionally, the free end of the third body portion 115 is a sharp corner structure. Preferably, the free end of the third body portion 115 is a streamlined sharp corner structure.

[0095] In this embodiment, the first balance block 11 includes two first body portions 116, and the two first body portions 116 are symmetrically arranged with respect to the preset symmetry plane 21 in a mirror image manner. That is, one first body portion 116 includes the second body portion 113 and half of the main body portion 114, and the other first body portion 116 includes the third body portion 115 and the other half of the main body portion 114.

[0096] Specifically, the first arc surface 1111 includes the inner side edge of the main body portion 114, and the second arc surface 1121 includes the outer side edge of the main body portion 114.

[0097] In this embodiment, the multiple flow holes 101 include a preset flow hole group, the preset flow hole group includes two flow holes 101; the two flow holes 101 of the preset flow hole group are respectively located on both sides of the preset radial plane 20; the preset symmetry plane 21 divides each flow hole 101 of the preset flow hole group into two hole portions that are symmetrically arranged with respect to the preset symmetry plane 21 in a mirror image manner.

[0098] In this embodiment, the first locking member 131 is inserted through the first balance block 11 and the rotor core 10 to lock and fix the first balance block 11 and the rotor core 10. Optionally, the first locking member 131 is a rivet.

[0099] In this embodiment, the second locking member 132 is inserted through the second balance block 12 and the rotor core 10 to lock and fix the second balance block 12 and the rotor core 10. Optionally, the second locking member 132 is a rivet.

[0100] The present utility model further provides a motor, which includes a stator assembly 30 and the above-mentioned rotor assembly 100, and the rotor core 10 is rotatably arranged inside the stator assembly 30.

[0101] Specifically, the flow area of the rotor core 10 is S 1 , and the flow area of the rotor core 10 includes the flow areas of a plurality of flow holes 101, that is, the flow area of the rotor core 10 is the sum of the flow areas of the plurality of flow holes 101; the flow area of the flow hole 101 refers to the cross-sectional area of the flow hole 101 perpendicular to the axial direction of the rotor core 10. The total flow area of the motor is S; K = S 1 / S, and the value range of K is from 0.13 to 0.3.

[0102] Specifically, the stator assembly 30 includes a stator core 35 and a winding 31, and the gap between the stator core 35 and the winding 31 is the stator wire package gap 32, and the gap between the stator core 35 and the winding 31 is the gap between the stator core slot and the winding. At least one cut surface portion 33 is provided on the outer peripheral surface of the stator assembly 30, and there is a gap between the cut surface portion 33 and the housing 40 of the compressor, that is, the cut surface gap 34. The total flow area of the motor includes the sum of the flow areas of a plurality of flow holes 101, the flow area of the gap between the outer peripheral surface of the rotor core 10 and the inner wall surface of the stator assembly 30, the stator wire package gap 32 of the stator assembly 30, and the sum of the flow areas of all the cut surface gaps 34 of the stator assembly 30. Figure 11 The preset gap 38 in

[0103] The present utility model further provides a compressor, which includes the above-mentioned rotor assembly 100.

[0104] Specifically, the compressor includes a motor, and the motor includes a stator assembly 30 and the above-mentioned rotor assembly 100.

[0105] Specifically, the stator assembly 30 includes a stator core 35, an insulating member 36, a lead wire assembly 37, and a winding 31.

[0106] Specifically, the compressor further includes an upper cover assembly 41, a liquid distributor assembly 42, a lower cover 43, a pump body assembly 44, a housing assembly 45, and an oil sump 46; the upper cover assembly 41 includes a compressor upper cover; the pump body assembly 44 includes a compressor pump body; the housing assembly 45 includes a housing 40.

[0107] Optionally, the compressor is a rotary compressor.

[0108] In the compressor of the present application, the high-temperature and high-pressure refrigerant is more likely to enter through the flow holes 101 on the side of the first balance weight 11, that is, the high-temperature and high-pressure refrigerant is more likely to enter the flow holes 101 on the side of the first balance weight 11; after the refrigerant flows through the flow holes 101, it flows out from the upper end of the flow holes 101; under the centrifugal force of the rotor assembly 100, the refrigerant flowing out from the flow holes 101 is thrown onto the inner wall of the housing 40, and the oil droplets contained in the refrigerant are separated from the refrigerant. The separated oil droplets return to the cavity below the stator assembly 30 through gaps such as the section gap 34, the stator winding package gap 32, and the gap between the outer peripheral surface of the rotor core 10 and the inner wall surface of the stator assembly 30, and then return to the oil sump 46 at the lower end of the pump body assembly 44. Since the oil droplets in the refrigerant are effectively separated inside the housing 40 (especially under high-frequency operating conditions), rather than being discharged from the compressor with the refrigerant, the oil discharge rate of the compressor is reduced, the refrigerant flow rate increases, and the maximum refrigerating capacity or the maximum heating capacity is improved, thereby improving the energy efficiency of the compressor.

[0109] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0110] In the rotor assembly 100 provided by the present utility model, the rotor assembly 100 includes a rotor core 10, a first balance weight 11, and a second balance weight 12; along the axial direction of the rotor core 10, the rotor core 10 has two axially opposite end faces; the central axis of the rotor core 10 is located on a preset radial plane 20; a plurality of flow holes 101 are provided on the rotor core 10 and are distributed along its circumferential direction; the first balance weight 11 and the second balance weight 12 are respectively arranged on the two axially opposite end faces of the rotor core 10, and the first balance weight 11 and the second balance weight 12 are respectively located on both sides of the preset radial plane 20.

[0111] The first balance weight 11 is used to be arranged on the side of the rotor core 10 facing the compressor pump body, and the second balance weight 12 is used to be arranged on the side of the rotor core 10 facing the compressor upper cover; that is, the first balance weight 11 is arranged on the lower axial end face of the rotor core 10, and the second balance weight 12 is arranged on the upper axial end face of the rotor core 10. An included angle portion 121 is formed on the circumferential surface of the second balance weight 12.

[0112] The refrigerant within the compressor flows through the flow hole 101 in the direction from the compressor pump body to the compressor upper cover; by forming an angled portion 121 on the circumferential surface of the second balance weight 12, the two planar portions 1211 forming the angled portion 121 contribute to the separation of the refrigerant gas containing oil droplets, that is, the two planar portions 1211 can act like a cutting function, thereby improving the separation effect of the oil droplets from the refrigerant gas, reducing the oil carry-over rate in the refrigerant gas, and lowering the oil discharge rate of the compressor. It can be seen that adopting the rotor assembly 100 of the present application is beneficial to reducing the oil discharge rate of the compressor.

[0113] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data used in an appropriate case can be interchanged so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0114] For the sake of convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0115] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rotor assembly, characterized in that: include: A rotor core (10), the rotor core (10) having two axial end surfaces arranged opposite to each other; the central axis of the rotor core (10) is located on a preset radial surface (20); and the rotor core (10) is provided with a plurality of flow holes (101) distributed along its circumference; A first balancing block (11) and a second balancing block (12), wherein the first balancing block (11) and the second balancing block (12) are respectively arranged on two axial end faces of the rotor core (10) and are respectively located on both sides of the preset radial face (20); the first balancing block (11) is used to be arranged on a side of the rotor core (10) facing the compressor pump body; and the circumferential face of the second balancing block (12) is formed with an angle portion (121).

2. The rotor assembly according to claim 1, characterized in that Along the extension direction of the second balancing block (12), the second balancing block (12) has a first end and a second end; the circumferential surface of the second balancing block (12) comprises a first end surface, a second end surface, an inner side edge and an outer side edge which are arranged oppositely; The first end surface of the second balancing weight (12) is arranged at an acute angle, a right angle, or an obtuse angle with its inner side edge; and / or The second end surface of the second balancing weight (12) is arranged at an acute angle, a right angle, or an obtuse angle with its inner side edge; and / or The first end face of the second balancing block (12) is arranged at an acute angle, a right angle, or an obtuse angle with its outer side edge; and / or The second end surface of the second balancing block (12) is arranged at an acute angle, a right angle, or an obtuse angle with its outer side edge.

3. The rotor assembly according to claim 2, characterized in that: The outer side of the second balancing block (12) is an arc-shaped surface; and / or The first end surface of the second balancing block (12) is perpendicular to the preset radial surface (20); and / or The second end surface of the second balancing block (12) is perpendicular to the preset radial surface (20).

4. The rotor assembly according to claim 2, characterized in that: The preset symmetry plane (21) is perpendicular to the preset radial plane (20), and the central axis of the rotor core (10) is located on the preset symmetry plane (21); the second balancing block (12) includes two fourth body parts (1216), and the two fourth body parts (1216) are arranged in a mirror-symmetrical manner relative to the preset symmetry plane (21).

5. The rotor assembly according to claim 2, characterized in that: The center line of the preset circle (22) coincides with the center axis of the rotor core (10); the diameter of the preset circle (22) is smaller than the diameter of the rotor core (10); and the second balancing block (12) is located outside the preset circle (22); The first tangent line (221) is a tangent line of the preset circle (22), the first tangent line (221) is parallel to the first end surface of the second balancing weight (12); the vertical distance between the first tangent line (221) and the first end surface of the second balancing weight (12) is L1, and the value range of L1 is 3 mm to 7 mm; and / or The second tangent line (222) is a tangent line of the preset circle (22), and the second tangent line (222) is parallel to the second end face of the second balancing block (12); a vertical distance between the second tangent line (222) and the second end face of the second balancing block (12) is L2, and a value range of L2 is 3 mm to 7 mm.

6. The rotor assembly according to claim 1, characterized in that The center line of the preset circle (22) coincides with the center axis of the rotor core (10); the diameter of the preset circle (22) is smaller than the diameter of the rotor core (10); the plurality of flow holes (101) are all located within the preset circle (22); and the first balancing block (11) and the second balancing block (12) are both located outside the preset circle (22).

7. The rotor assembly according to claim 6, characterized in that The circumferential surface of the first balancing block (11) comprises an inner side edge and an outer side edge; The inner side edge of the first balancing block (11) comprises a first arcuate surface (1111), the central axis of the first arcuate surface (1111) coincides with the central axis of the rotor core (10); the difference between the radius of the first arcuate surface (1111) and the radius of the preset circle (22) is r1, and the value range of r1 is 1 mm to 3 mm; and / or The outer side of the first balancing block (11) includes a second arcuate surface (1121), and the central axis of the second arcuate surface (1121) coincides with the central axis of the rotor core (10); the difference between the radius of the rotor core (10) and the radius of the second arcuate surface (1121) is r2, and the value range of r2 is 1 mm to 3 mm.

8. The rotor assembly according to claim 1, characterized in that The center line of the preset circle (22) coincides with the center axis of the rotor core (10); the diameter of the preset circle (22) is smaller than the diameter of the rotor core (10); the plurality of flow holes (101) are all located within the preset circle (22); each of the flow holes (101) is arranged tangentially to the preset circle (22); and / or The number of the flow holes (101) is an even number; and / or The plurality of flow holes (101) are evenly distributed along the circumference of the rotor core (10); and / or The circulation hole (101) is a circular hole; or, the circulation hole (101) has an inner wall and an outer wall, and the inner wall and the outer wall of the circulation hole (101) are both arc-shaped surfaces; the central axis of the inner wall of the circulation hole (101) coincides with the central axis of the rotor core (10), and the central axis of the outer wall of the circulation hole (101) coincides with the central axis of the rotor core (10).

9. The rotor assembly according to claim 1, characterized in that: The circumferential surface of the first balancing block (11) is a smooth surface as a whole.

10. The rotor assembly according to claim 9, characterized in that Along the circumferential direction of the rotor core (10), the first balancing block (11) comprises a second body portion (113), a main body portion (114), and a third body portion (115) which are connected in sequence; an end of the second body portion (113) away from the main body portion (114) is a free end, and an end of the third body portion (115) away from the main body portion (114) is a free end; The width of the second body portion (113) gradually increases from the free end of the second body portion (113) to the connection end thereof; and / or In a direction from the free end of the third main body portion (115) to its connecting end, the width of the third main body portion (115) gradually increases.

11. The rotor assembly according to claim 9, characterized in that A preset symmetry plane (21) is perpendicular to the preset radial plane (20), and a central axis of the rotor core (10) is located on the preset symmetry plane (21); the first balancing block (11) comprises two first body parts (116), and the two first body parts (116) are arranged in a mirror-symmetrical manner relative to the preset symmetry plane (21); and / or The circumferential surface of the first balancing block (11) includes an inner side edge and an outer side edge; the inner side edge of the first balancing block (11) includes a first arcuate surface (1111), and the central axis of the first arcuate surface (1111) coincides with the central axis of the rotor core (10); the outer side edge of the first balancing block (11) includes a second arcuate surface (1121), and the central axis of the second arcuate surface (1121) coincides with the central axis of the rotor core (10).

12. The rotor assembly according to claim 9, characterized in that The preset symmetry plane (21) is perpendicular to the preset radial plane (20), and the central axis of the rotor core (10) is located on the preset symmetry plane (21); the first balancing block (11) comprises two first body parts (116), and the two first body parts (116) are arranged in a mirror-symmetrical manner with respect to the preset symmetry plane (21); the second balancing block (12) comprises two fourth body parts (1216), and the two fourth body parts (1216) are arranged in a mirror-symmetrical manner with respect to the preset symmetry plane (21); The plurality of flow holes (101) include a preset flow hole group, the preset flow hole group includes two flow holes (101); the two flow holes (101) of the preset flow hole group are respectively located on both sides of the preset radial surface (20); the preset symmetry surface (21) divides each flow hole (101) of the preset flow hole group into two hole portions that are arranged in a mirror-symmetrical manner relative to the preset symmetry surface (21).

13. An electric motor, comprising a stator assembly (30) and a rotor assembly, characterized in that: The rotor assembly is the rotor assembly according to any one of claims 1 to 12.

14. The motor according to claim 13, characterized in that The flow area of ​​the rotor core (10) of the rotor assembly is S1, and the flow area of ​​the rotor core (10) includes the flow area of ​​a plurality of flow holes (101) on the rotor core (10); the total flow area of ​​the motor is S; K=S1 / S, and the value range of K is 0.13 to 0.

3.

15. A compressor, characterized in that: A motor comprising the motor described in claim 13 or 14.

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