Rotor assembly, compressor and refrigeration equipment

Abstract

The utility model discloses a rotor assembly, a compressor and refrigeration equipment, and belongs to the technical field of compressors. Wherein the rotor assembly comprises a rotor iron core, a crankshaft, a first baffle ring and a second baffle ring, the rotor iron core is provided with a shaft hole and a through-flow hole which are arranged at an interval, the through-flow hole penetrates through the rotor iron core in the axial direction of the rotor iron core, and the rotor iron core is provided with a first end face and a second end face which are deviated from each other; the first baffle ring is connected to the first end face, and a first through hole allowing the crankshaft to penetrate through and communicating with the through-flow hole is formed in the first baffle ring. The second baffle ring is connected to the second end surface; the rotor assembly further comprises a first balance block and a second balance block, the first balance block is installed on the side, opposite to the crankshaft, of the first baffle ring in the radial direction of the rotor iron core, and the second balance block is installed on the side, facing the crankshaft, of the second baffle ring. According to the utility model, the countercurrent of the refrigerant in the through-flow hole is effectively inhibited, and the oil liquid can fall back in the gap between the stator assembly and the compressor shell.

Description

Technical Field

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

[0002] In conventional compressors, balancing weights are typically installed at each end of the rotor core to counterbalance the unbalanced forces generated by the eccentric crankshaft in the rotor assembly. The negative pressure generated near the eccentric shaft is greater than that generated farther away, causing a reverse flow of refrigerant in the flow holes. Some of the refrigerant then flows upward through the gap between the stator assembly and the compressor housing, making it difficult for the oil to fall back between the stator assembly and the compressor housing. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a rotor assembly that effectively suppresses the occurrence of refrigerant backflow in the flow hole and helps the oil to fall back into the gap between the stator assembly and the compressor housing.

[0004] The utility model also provides a compressor and a refrigeration device comprising the rotor assembly.

[0005] According to the embodiment of the first aspect of the present invention, the rotor assembly includes: a rotor core, a crankshaft, a first retaining ring and a second retaining ring, the rotor core is provided with an axial hole and a flow hole arranged at intervals, the flow hole passes through the rotor core along the axial direction of the rotor core, the rotor core is provided with a first end face and a second end face that are opposite to each other, the first end face faces the pump body assembly, and the second end face faces away from the pump body assembly; one end of the crankshaft is passed through the axial hole, and the other end is used to connect with the pump body assembly; the first retaining ring is connected to the first end face, and the interior of the first retaining ring forms a first through hole for the crankshaft to pass through and communicate with the flow hole; the second retaining ring is connected to the second end face; wherein, the rotor assembly also includes a first balancing block and a second balancing block, along the radial direction of the rotor core, the first balancing block is installed on the side of the first retaining ring facing away from the crankshaft, and the second balancing block is installed on the side of the second retaining ring facing the crankshaft.

[0006] The rotor assembly according to the embodiment of the present utility model has at least the following beneficial effects:

[0007] The rotor assembly of the present invention embodiment is provided with a first retaining ring on the first end face of the rotor core, and a second retaining ring is provided on the second end face of the rotor core, wherein, along the radial direction of the rotor core, the first balancing block is installed on the side of the first retaining ring facing away from the crankshaft, and the second end face is provided with a second retaining ring, and along the radial direction of the rotor core, the second balancing block is installed on the side of the second retaining ring facing the crankshaft; during the operation of the compressor installed with the rotor assembly, the first retaining ring can block the air in the flow hole from flowing to the area where the first balancing block rotates and passes, while the air in the gap between the rotor core and the stator core will flow to the area where the first balancing block rotates and passes under the action of the first balancing block; at the same time, the second retaining ring can block the air in the gap between the rotor core and the stator core from flowing to the area where the second balancing block rotates and passes, while the air in the flow hole will flow to the area where the second balancing block rotates and passes under the action of the second balancing block, effectively suppressing the occurrence of refrigerant backflow in the flow hole, and helping the oil to fall back in the gap between the stator assembly and the compressor casing.

[0008] According to some embodiments of the present invention, the rotor assembly also includes a first end plate, which is fixed to the first end surface and arranged along the circumference of the rotor core. The inner circumference of the first end plate is connected to the first retaining ring, and the first balancing block is connected to the end of the first end plate facing away from the rotor core.

[0009] According to some embodiments of the present invention, the rotor assembly also includes a second end plate, which is fixed to the second end surface and arranged along the circumference of the rotor core. The second end plate is provided with a second through hole for the crankshaft to pass through and connected with the through hole. The outer peripheral edge of the second end plate is connected to the second retaining ring. The second balancing block is arranged between the hole wall of the second through hole and the second retaining ring. The second balancing block is connected to the end of the second end plate facing away from the rotor core.

[0010] According to some embodiments of the present invention, the rotor assembly further includes a first fastener, which passes through the first balancing block and the first end plate and is fixedly connected to the rotor core.

[0011] According to some embodiments of the present invention, the rotor assembly further includes a second fastener, which is passed through the second balancing block and the second end plate and is fixedly connected to the rotor core.

[0012] According to some embodiments of the present invention, in the radial direction of the rotor core, the inner edge of the first balancing block is an arc surface, the minimum distance between the inner edge of the first balancing block and the axis of the first through hole is L1, the outer diameter of the first retaining ring is R1, and it satisfies: 0mm≤L1-R1≤8mm, the inner diameter of the second retaining ring is R2, the outer edge of the second balancing block is an arc surface, the maximum distance between the outer edge of the second balancing block and the axis of the second through hole is L2, and it satisfies: 0mm≤R2-L2≤8mm.

[0013] According to some embodiments of the present invention, the rotor assembly also includes a first end plate, which is fixed to the first end surface and arranged along the circumference of the rotor core. The inner circumference of the first end plate is folded toward the pump body assembly to form the first retaining ring. Along the radial direction of the rotor core, the maximum outer diameter of the rotor core is greater than the outer diameter of the first end plate, and the maximum outer diameter of the rotor core is greater than the outer diameter of the second end plate.

[0014] According to some embodiments of the present invention, along the axial direction of the rotor core, the height of the first retaining ring is H1, the height of the first balancing block is H2, satisfying: 0.2*H2≤H1≤3*H2, the height of the second retaining ring is H3, the height of the second balancing block is H4, satisfying: 0.2*H4≤H3≤3*H4.

[0015] According to some embodiments of the present invention, along the axial direction of the rotor core, the height of the first balancing block is H2, the distance between the first balancing block and the pump body assembly is L3, and the height of the first retaining ring is H1, satisfying: H2+L3>H1.

[0016] According to some embodiments of the present invention, there are multiple flow holes, and the multiple flow holes are arranged at intervals along the circumference of the axial hole. In the axial direction of the rotor core, the projection of at least part of the first through hole covers the projection of the multiple through holes, and the projection area of the first through hole is greater than or equal to 0.5 times the sum of the projection areas of all the through holes.

[0017] According to the compressor of the second embodiment of the present invention, the compressor includes a housing, a stator core, a pump body assembly and a rotor assembly as described in the first embodiment, wherein the stator core, the pump body assembly and the rotor assembly are installed in the housing, the rotor core is rotatably arranged in the stator core mounting hole, and the crankshaft is rotatably arranged in the pump body assembly.

[0018] The compressor according to the embodiment of the present invention has at least the following beneficial effects:

[0019] The compressor adopts the rotor assembly of the first aspect embodiment, and a first retaining ring is provided on the first end face of the rotor core, and a second retaining ring is provided on the second end face of the rotor core. The first retaining ring blocks the air in the flow hole from flowing to the area through which the first balancing block rotates, while the air in the gap between the rotor core and the stator core will flow to the area through which the first balancing block rotates under the action of the first balancing block. The second retaining ring blocks the air in the gap between the rotor core and the stator core from flowing to the area through which the second balancing block rotates, while the air in the flow hole will flow to the area through which the second balancing block rotates under the action of the second balancing block, effectively suppressing the occurrence of refrigerant backflow in the flow hole, helping the oil to fall back in the gap between the stator assembly and the compressor casing, and improving the stability of the oil level in the compressor inner cavity, thereby reducing the wear of the compressor and extending the service life of the compressor.

[0020] A refrigeration device according to an embodiment of the third aspect of the present invention includes the compressor as described in the embodiment of the second aspect.

[0021] The refrigeration equipment according to the embodiment of the present utility model has at least the following beneficial effects:

[0022] The refrigeration equipment adopts the compressor of the second embodiment, which suppresses the occurrence of refrigerant backflow in the flow hole, so that the oil can more easily fall back in the gap between the stator assembly and the compressor casing, thereby improving the stability of the oil level in the compressor cavity, reducing the wear of the compressor, improving the operating stability of the refrigeration equipment, and extending the service life of the refrigeration equipment.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 A schematic diagram of the refrigerant in the rotor assembly in the prior art when it flows in reverse;

[0026] Figure 2 A cross-sectional view of a compressor according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention;

[0028] Figure 4 An exploded view of a rotor assembly according to an embodiment of the present invention;

[0029] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 6 for Figure 2 Enlarged view of point B in the middle;

[0031] Figure 7 This is an assembly diagram of the first balancing weight and the first end plate according to an embodiment of the present invention;

[0032] Figure 8 This is an assembly diagram of the second balancing weight and the second end plate according to an embodiment of the present invention;

[0033] Figure 9 A top view of a first balancing weight according to an embodiment of the present invention;

[0034] Figure 10 A top view of a first end plate according to an embodiment of the present invention;

[0035] Figure 11 A top view of a second balancing weight according to an embodiment of the present invention;

[0036] Figure 12 A top view of a second end plate according to an embodiment of the present invention;

[0037] Figure 13 A cross-sectional view of a first end plate according to an embodiment of the present invention;

[0038] Figure 14 A side view of a first balancing weight according to an embodiment of the present invention;

[0039] Figure 15 A cross-sectional view of a second end plate according to an embodiment of the present invention;

[0040] Figure 16 A side view of a second balancing weight according to an embodiment of the present invention;

[0041] Figure 17 This is a line graph showing the corresponding relationship between the oil level and the height values of the first and second retaining rings according to an embodiment of the present invention.

[0042] Figure Number:

[0043] Rotor assembly 1000; pump body assembly 1100; stator core 1200; mounting hole 1210; compressor 2000; housing 2100; inner cavity 2110; first gap 2200; second gap 2300; rotor core 100; shaft hole 110; flow hole 120; first end face 130; second end face 140; crankshaft 200; first balancing block 300; first connecting hole 310; second balancing block 400; fourth connecting hole 410; first end plate 500; first retaining ring 510; first through hole 511; second connecting hole 520; second end plate 600; second retaining ring 610; second through hole 620; fifth connecting hole 630; second fastener 700. DETAILED DESCRIPTION

[0044] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0045] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of this utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0047] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0048] In related art, the refrigerant flow path in a compressor is typically through the flow holes in the rotor core and the gap between the rotor and stator cores. The refrigerant flows from the pump assembly through the flow holes from bottom to top, with some flowing from top to bottom through the gap between the rotor and stator cores. Meanwhile, lubricating oil falls back down through the gap between the stator assembly and the compressor casing.

[0049] However, when the balancing block installed toward the pump assembly rotates, negative pressure is generated in the area along its moving trajectory and a negative pressure zone is formed. The air in the through-hole will flow into this negative pressure zone, thereby causing a refrigerant backflow phenomenon, affecting the normal flow of refrigerant in the through-hole and the gap between the rotor core and the stator core. Specifically, referring to Figure 1 As shown, when refrigerant backflow occurs, the refrigerant in the flow hole 120 will flow from top to bottom, and part of the refrigerant will flow upward from the gap between the stator assembly and the outer casing of the compressor 2000, which will make it difficult for the oil to fall downward from the gap between the stator assembly and the outer casing of the compressor 2000, making it difficult to maintain a stable oil level in the inner cavity 2110 of the compressor 2000, aggravating the wear between the components of the compressor 2000 and having a negative impact on the long-term stable operation of the compressor 2000.

[0050] To this end, some embodiments of the present invention provide a rotor assembly 1000 suitable for a compressor 2000, specifically referring to Figures 2 to 17 A rotor assembly 1000 is shown for illustration.

[0051] For the convenience of description, the following description takes the rotor assembly 1000 as an example of being installed in the inner cavity 2110 of the compressor 2000. Figure 2 As shown, in the embodiment of the present invention, the compressor 2000 includes a housing 2100, a stator core 1200, a pump assembly 1100, and a rotor assembly 1000. The housing 2100 is provided with an inner cavity 2110. To protect the stator core 1200, the pump assembly 1100, and the rotor assembly 1000, the stator core 1200, the pump assembly 1100, and the rotor assembly 1000 are all installed in the inner cavity 2110.

[0052] Among them, the pump body assembly 1100 is arranged at the bottom of the inner cavity 2110, the rotor assembly 1000 and the stator assembly are located on the upper side of the pump body assembly 1100, the stator core 1200 of the stator assembly is provided with a mounting hole 1210, the rotor assembly 1000 is rotatably arranged in the mounting hole 1210, and there is a first gap 2200 between the rotor core 100 and the inner wall of the mounting hole 1210, and there is a second gap 2300 between the stator core 1200 and the outer shell.

[0053] Specifically, refer to Figure 3 and Figure 4As shown, in an embodiment of the present invention, the rotor assembly 1000 includes a rotor core 100, a crankshaft 200, a first retaining ring 510, a second retaining ring 610, a first balancing mass 300, and a second balancing mass 400, wherein an axial hole 110 and a flow hole 120 are provided in the central area of the rotor core 100. Along the radial direction of the rotor core 100, the flow hole 120 is located outside the axial hole 110 and penetrates the rotor core 100 along the axial direction of the rotor core 100. Therefore, the refrigerant can flow from bottom to top along the flow hole 120. One end of the crankshaft 200 is passed through the axial hole 110, and the other end is connected to the pump body assembly 1100.

[0054] Continue to refer to Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the rotor core 100 is provided with a first end face 130 and a second end face 140 facing each other in the axial direction, wherein the first end face 130 faces the pump body assembly 1100, and the first balancing block 300 is installed on the first end face 130; the second end face 140 faces away from the pump body assembly 1100, and the second balancing block 400 is installed on the second end face 140.

[0055] Reference Figure 3 and Figure 4 As shown, in an embodiment of the present invention, a first retaining ring 510 is provided on the first end surface 130. The first retaining ring 510 is an annular structure coaxial with the shaft hole 110. The first retaining ring 510 protrudes from the rotor core 100 toward the pump body assembly 1100. Specifically, the first retaining ring 510 is surrounded by a first through hole 511. The first through hole 511 is arranged opposite to the flow hole 120 and is interconnected. The crankshaft 200 passes through the first through hole 511 and the shaft hole 110 in sequence from bottom to top. In this embodiment, along the radial direction of the rotor core 100, the first balancing weight 300 is installed on the side of the first retaining ring 510 facing away from the crankshaft 200. In one example, the first retaining ring 510 is provided with a lug, and the first retaining ring 510 is fastened to the rotor core 100 via the lug; in another example, the first retaining ring 510 is welded to the rotor core 100.

[0056] Reference Figure 2As shown, it can be understood that in the embodiment of the present invention, since the first baffle ring 510 is disposed between the first balancing weight 300 and the flow hole 120, when the first balancing weight 300 rotates, the first baffle ring 510 can block the air in the flow hole 120 from flowing toward the area through which the first balancing weight 300 rotates, while the air in the first gap 2200 can smoothly flow toward the area through which the first balancing weight 300 rotates under the action of the first balancing weight 300. Since the first baffle ring 510 only acts as a barrier to the flow hole 120, the effect of the negative pressure generated by the first balancing weight 300 on the airflow in the flow hole 120 is reduced, thereby reducing the possibility of the refrigerant in the flow hole 120 flowing backward from top to bottom, allowing the oil to fall back more smoothly along the second gap 2300.

[0057] Reference Figure 3 and Figure 5 As shown, in this embodiment of the present invention, the second end surface 140 is provided with a second retaining ring 610. The second retaining ring 610 is an annular structure coaxial with the shaft hole 110. The second retaining ring 610 protrudes from the rotor core 100, facing away from the pump body assembly 1100. Specifically, along the radial direction of the rotor core 100, the second retaining ring 610 is located between the first gap 2200 and the flow hole 120. The second balancing weight 400 is mounted on the side of the second retaining ring 610 facing the crankshaft 200, that is, the second balancing weight 400 is located on the same side as the flow hole 120. In one example, the second retaining ring 610 is provided with a lug, and the second retaining ring 610 is fastened to the rotor core 100 via the lug; in another example, the second retaining ring 610 is welded to the rotor core 100.

[0058] Reference Figure 2 As shown, it can be understood that in the embodiment of the present invention, since the second balancing weight 400 and the flow hole 120 are located on the inner side of the second baffle ring 610, and the first gap 2200 is located on the outer side of the second baffle ring 610, when the second balancing weight 400 rotates, the second baffle ring 610 can block the air in the first gap 2200 from flowing toward the area through which the second balancing weight 400 rotates, while the air in the flow hole 120 will smoothly flow toward the area through which the second balancing weight 400 rotates under the action of the second balancing weight 400. Since the second baffle ring 610 only acts as a barrier to the first gap 2200, the effect of the negative pressure generated by the second balancing weight 400 on the airflow in the flow hole 120 is increased, further reducing the possibility of the refrigerant in the flow hole 120 flowing back from top to bottom, thereby allowing the oil to fall back more smoothly along the second gap 2300.

[0059] Reference Figure 4 and Figure 5As shown, in an embodiment of the present invention, the rotor assembly 1000 further includes a first end plate 500, which is annular in shape as a whole and is coaxial with the shaft hole 110. The first end plate 500 is fixedly connected to the first end face 130. For example, the first end plate 500 and the rotor core 100 can be connected by fasteners, welding, or other forms of connection. The first balancing weight 300 is fixedly connected to the end of the first end plate 500 facing away from the rotor core 100, and extends around the circumference of the first retaining ring 510, thereby being indirectly connected to the rotor core 100.

[0060] Continue to refer to Figure 4 and Figure 5 As shown, in this embodiment of the present invention, the inner circumference of the first end plate 500 is connected to the first retaining ring 510. Therefore, the first retaining ring 510 is indirectly connected to the rotor core 100 through the first end plate 500. In one example, the first end plate 500 and the first retaining ring 510 are integrally formed. Specifically, the first retaining ring 510 is formed by a stamping process. The inner circumference of the first end plate 500 is folded toward the pump body assembly 1100 to form the first retaining ring 510, and the first through hole 511 is formed around it.

[0061] Reference Figure 4 and Figure 6 As shown, in an embodiment of the present invention, the rotor assembly 1000 further includes a second end plate 600. The second end plate 600 is generally annular and coaxial with the shaft hole 110. The second end plate 600 is fixedly connected to the second end surface 140. For example, the second end plate 600 and the rotor core 100 can be connected by fasteners, welding, or other forms of connection. The second end plate 600 is provided with a second through hole 620. The second through hole 620 is located at the center of the second end plate 600. The second through hole 620 is arranged opposite to the flow hole 120, thereby communicating with the flow hole 120. The crankshaft 200 can pass through the shaft hole 110 and the second through hole 620 in sequence from bottom to top. The second balancing weight 400 is fixedly connected to the end of the second end plate 600 facing away from the rotor core 100 and extends axially around the second through hole 620, thereby indirectly connecting to the rotor core 100.

[0062] Continue to refer to Figure 4 and Figure 6 As shown, in this embodiment of the present invention, the outer periphery of the second end plate 600 is connected to the second retaining ring 610. Therefore, the second retaining ring 610 is indirectly connected to the rotor core 100 through the second end plate 600. In one example, the second end plate 600 and the second retaining ring 610 are integrally formed. Specifically, the second retaining ring 610 is formed by a stamping process, and the outer periphery of the second end plate 600 is folded away from the pump body assembly 1100 to form the second retaining ring 610.

[0063] It is understood that in the embodiment of the present invention, the second balancing weight 400 is disposed between the hole wall of the second through hole 620 and the second retaining ring 610. Therefore, the second balancing weight 400, the second through hole 620, and the through hole 120 are all located on the inner side of the second retaining ring 610. When the second balancing weight 400 rotates, under the action of the second balancing weight 400, the air in the through hole 120 can pass through the through hole 120 and the second through hole 620 in sequence, thereby flowing to the area through which the second balancing weight 400 rotates, i.e., the second negative pressure area, thereby further reducing the possibility of the refrigerant in the through hole 120 flowing back from top to bottom.

[0064] In the embodiment of the present invention, the rotor assembly 1000 further includes a first fastener (not shown in the figure), which is sequentially passed through the first balancing block 300 and the first end plate 500 and fixedly connected to the rotor core 100. Figure 4 and Figure 7 As shown, the first balancing block 300 is provided with a first connecting hole 310, the first end plate 500 is provided with a second connecting hole 520, and the rotor core 100 is provided with a third connecting hole (not shown in the figure). The first connecting hole 310, the second connecting hole 520 and the third connecting hole are interconnected, and the first fastener is passed through the first connecting hole 310, the second connecting hole 520 and the third connecting hole.

[0065] In one example, the first fastener is a screw, and the third connection hole is a screw hole that can be threadedly engaged with the screw. Based on this, the first fastener can sequentially pass through the first connection hole 310 and the second connection hole 520 and engage with the third connection hole to achieve a fastened connection in a threaded connection manner. It should be noted that the first fastener is not limited to a screw, and can also be a rivet, etc., which is not limited in this embodiment.

[0066] Reference Figure 3 As shown, in the embodiment of the present invention, the rotor assembly 1000 further includes a second fastener 700, which is sequentially passed through the second balancing block 400 and the second end plate 600 and fixedly connected to the rotor core 100. Specifically, referring to Figure 4 and Figure 8 As shown, the second balancing block 400 is provided with a fourth connecting hole 410, the second end plate 600 is provided with a fifth connecting hole 630, and the rotor core 100 is provided with a sixth connecting hole (not shown in the figure). The fourth connecting hole 410, the fifth connecting hole 630 and the sixth connecting hole are interconnected, and the second fastener 700 is passed through the fourth connecting hole 410, the fifth connecting hole 630 and the sixth connecting hole.

[0067] In one example, the second fastener 700 is a screw, and the sixth connection hole is a screw hole that can be threadedly engaged with the screw. Based on this, the second fastener 700 can sequentially pass through the fourth connection hole 410 and the fifth connection hole 630 and engage with the sixth connection hole to achieve a fastened connection in a threaded connection manner. It should be noted that the second fastener 700 is not limited to a screw, and can also be a rivet, etc., which is not limited in this embodiment.

[0068] Reference Figure 9 As shown, in the embodiment of the present invention, the first balancing block 300 is in an arc shape as a whole, wherein, in the radial direction of the rotor core 100, the inner edge of the first balancing block 300 is an arc surface coaxially arranged with the shaft hole 110, the first through hole 511 is coaxial with the shaft hole 110, and the minimum distance between the inner edge of the first balancing block 300 and the axis of the first through hole 511 is L1. Figure 10 As shown, the outer diameter of the first retaining ring 510 is R1. Since the first retaining ring 510 is also coaxially arranged with the shaft hole 110, in this embodiment, L1-R1 represents the distance between the inner edge of the first balancing weight 300 and the first retaining ring 510.

[0069] It is understandable that during the experiment, the inventors learned that if there is no gap between the inner edge of the first balancing weight 300 and the first baffle ring 510, the first balancing weight 300 and the first baffle ring 510 are likely to interfere with each other, causing wear of the first baffle ring 510 and the first balancing weight 300. Conversely, if the gap between the inner edge of the first balancing weight 300 and the first baffle ring 510 is too large, the barrier effect of the first baffle ring 510 will be significantly reduced, making it difficult to prevent the air in the through-hole 120 from flowing into the first negative pressure zone created by the first balancing weight 300. To this end, in the embodiment of the present invention, the following condition is satisfied: 0mm≤L1-R1≤8mm, which not only ensures that the first balancing weight 300 does not interfere with the first baffle ring 510, but also reduces the possibility of air in the through-hole 120 bypassing the first baffle ring 510 and flowing into the first negative pressure zone, thereby reducing the possibility of refrigerant in the through-hole 120 flowing back.

[0070] Correspondingly, refer to Figure 11 As shown, in the embodiment of the present invention, the second balancing block 400 is in an arc shape as a whole, wherein, in the radial direction of the rotor core 100, the outer edge of the second balancing block 400 is an arc surface coaxially arranged with the shaft hole 110, the second through hole 620 is coaxial with the shaft hole 110, and the maximum distance between the outer edge of the second balancing block 400 and the axis of the second through hole 620 is L2. Figure 12 As shown, the inner diameter of the second retaining ring 610 is R2. Since the second retaining ring 610 is also coaxially arranged with the shaft hole 110, in this embodiment, R2-L2 represents the distance between the outer edge of the second balancing weight 400 and the second retaining ring 610.

[0071] It is understandable that during the experiment, the inventors learned that if there is no gap between the outer edge of the second balancing weight 400 and the second baffle ring 610, the second balancing weight 400 and the second baffle ring 610 are likely to interfere with each other, causing wear of the second baffle ring 610 and the second balancing weight 400. Conversely, if the gap between the outer edge of the second balancing weight 400 and the second baffle ring 610 is too large, the barrier effect of the second baffle ring 610 will be significantly reduced, making it difficult to prevent the air in the first gap 2200 from flowing into the first negative pressure zone created by the first balancing weight 300. Therefore, in the embodiment of the present invention, the following condition is satisfied: 0mm≤R2-L2≤8mm. This not only ensures that the second balancing weight 400 does not interfere with the second baffle ring 610, but also reduces the possibility of air in the first gap 2200 bypassing the second baffle ring 610 and flowing into the second negative pressure zone. This allows the air in the through-hole 120 to flow into the second negative pressure zone more easily, further reducing the possibility of refrigerant backflow in the through-hole 120.

[0072] It will be appreciated that in the embodiment of the present invention, the first end plate 500 is connected to the first end surface 130 of the rotor core 100, and the second end plate 600 is connected to the second end surface 140 of the rotor core 100. Therefore, to ensure that the rotor core 100 can fully support the first and second end plates 500 and 600, in this embodiment, along the radial direction of the rotor core 100, the maximum outer diameter of the rotor core 100 is greater than the outer diameter of the first end plate 500, and the maximum outer diameter of the rotor core 100 is greater than the outer diameter of the second end plate 600. Specifically, on a projection plane perpendicular to the axial direction of the rotor core 100, the projections of the first and second end plates 500 and 600 are both within the projection of the outer circumferential wall of the rotor core 100, thereby significantly improving the connection stability between the rotor core 100 and the first and second end plates 500 and 600, thereby enhancing the overall structural stability of the rotor assembly 1000.

[0073] In the embodiment of the present utility model, referring to Figure 13 As shown, along the axial direction of the rotor core 100, the height of the first retaining ring 510 is H1. Figure 14 As shown, the height of the first balancing block 300 is H2. It is understandable that the inventors learned during the test that if the height of the first baffle ring 510 is too high relative to the first balancing block 300, the first baffle ring 510 will be too close to the pump body assembly 1100, thereby increasing the possibility of interference between the first baffle ring 510 and the pump body assembly 1100. In addition, it will make it difficult for the refrigerant to pass through the gap between the first baffle ring 510 and the pump body assembly 1100 and enter the flow hole 120; conversely, if the height of the first baffle ring 510 is too low relative to the first balancing block 300, the barrier effect of the first baffle ring 510 will be significantly reduced, making it difficult to prevent the air in the flow hole 120 from flowing to the first negative pressure area created by the first balancing block 300.

[0074] To this end, in an embodiment of the present utility model, the following condition is satisfied: 0.2*H2≤H1≤3*H2, thereby ensuring that there is sufficient clearance between the first baffle ring 510 and the pump body assembly 1100 for the refrigerant to pass smoothly and flow into the flow hole 120, thereby reducing the risk of interference between the first baffle ring 510 and the pump body assembly 1100, and ensuring that the first baffle ring 510 can reduce the possibility of the air in the flow hole 120 bypassing the first baffle ring 510 and entering the first negative pressure zone, thereby effectively blocking the air in the flow hole 120 from flowing to the first negative pressure zone.

[0075] Similarly, in the embodiment of the present utility model, refer to Figure 15 As shown in FIG, along the axial direction of the rotor core 100, the height of the second retaining ring 610 is H3. Figure 16 As shown, the height of the second balancing mass 400 is H4. It is understandable that the inventors learned during testing that if the height of the second baffle ring 610 relative to the second balancing mass 400 is too high, not only will the rotor assembly 1000 be too large in the axial direction of the compressor 2000, occupying too much space inside the housing 2100, but it will also increase the material cost of the rotor assembly 1000. Conversely, if the height of the second baffle ring 610 relative to the second balancing mass 400 is too low, the barrier effect of the second baffle ring 610 will be significantly reduced, making it difficult to prevent the air in the first gap 2200 from flowing toward the second negative pressure zone created by the second balancing mass 400.

[0076] To this end, in an embodiment of the present invention, the following condition is satisfied: 0.2*H4≤H3≤3*H4, thereby ensuring that the second baffle ring 610 does not occupy too much internal space of the shell 2100, and that the second baffle ring 610 can reduce the possibility of the air in the first gap 2200 bypassing the second baffle ring 610 and entering the second negative pressure zone, thereby effectively blocking the air in the first gap 2200 from flowing toward the second negative pressure zone.

[0077] Specifically, refer to Figure 17 , shows the corresponding relationship between the oil level and the height of the first baffle ring 510 and the second baffle ring 610. It should be noted that, Figure 17 The horizontal axis is the value of the height H1 of the first retaining ring 510 or the height H3 of the second retaining ring 610, the vertical axis is the height of the oil level, and its unit is mm (millimeter). The height H2 of the first balancing block 300 and the height H2 of the second balancing block 400 are a.

[0078] Based on this, combined Figure 10It can be understood that when the height H1 of the first baffle ring 510 or the height H3 of the second baffle ring 610 is within the range of 0.2a to 3.0a, the oil level can be maintained above 8mm, which is the required oil level. When the height H1 of the first baffle ring 510 or the height H3 of the second baffle ring 610 is less than 0.2a, the oil level drops sharply, indicating that the first baffle ring 510 is unable to prevent the air in the through hole 120 from flowing toward the first negative pressure zone, or the second baffle ring 610 is unable to prevent the air in the first gap 2200 from flowing toward the second negative pressure zone, resulting in refrigerant backflow, which in turn makes it difficult for the oil in the second gap 2300 to fall back, resulting in a low oil level.

[0079] When the height H1 of the first baffle ring 510 is greater than 3a, the oil level will also drop sharply, indicating that the gap between the first baffle ring 510 and the pump body assembly 1100 is too small, and the refrigerant has difficulty passing through the gap between the first baffle ring 510 and the pump body assembly 1100 and entering the flow hole 120, and instead flows upward from the second gap 2300, which makes it difficult for the oil in the second gap 2300 to fall back, resulting in a low oil level.

[0080] Therefore, the first retaining ring 510 of this embodiment satisfies: 0.2*H2≤H1≤3*H2; and the second retaining ring 610 satisfies: 0.2*H4≤H3≤3*H4.

[0081] Reference Figure 5 As shown, in the embodiment of the present invention, the distance between the first balancing block 300 and the pump body assembly 1100 is L3. To prevent the gap between the first baffle ring 510 and the pump body assembly 1100 from being too small, which would make it difficult for the refrigerant to pass through the gap between the first baffle ring 510 and the pump body assembly 1100 and enter the flow hole 120, in this embodiment, the following condition is satisfied: H2 + L3 > H1, thereby ensuring that there is a sufficient gap between the first baffle ring 510 and the pump body assembly 1100 for the refrigerant to pass smoothly and flow into the flow hole 120.

[0082] Reference Figure 3 and Figure 4 As shown, in this embodiment of the present invention, a plurality of through-holes 120 are provided, and the plurality of through-holes 120 are spaced apart along the circumference of the axial hole 110 to ensure smooth flow of the refrigerant. The first through-hole 511 is disposed opposite the plurality of through-holes 120, so that the refrigerant can flow through the first through-hole 511 and the through-holes 120 in sequence. In the axial direction of the rotor core 100, at least a portion of the projection of the first through-hole 511 overlaps the projection of the plurality of through-holes 120.

[0083] In order to ensure that the first end plate 500 does not block the coolant from flowing into the through-holes 120, in this embodiment, the projected area of the first through-hole 511 is greater than or equal to 0.5 times the sum of the projected areas of all the through-holes 120. Figure 10 As shown, the aperture of the first through hole 511 is R3. In this embodiment, the sum of the projected areas of all the through holes 120 is S, which satisfies: πR3 2 ≥0.5S.

[0084] Reference Figure 2 As shown, an embodiment of the present invention also proposes a compressor 2000, including a shell 2100, a stator core 1200, a pump body assembly 1100 and the rotor assembly 1000 of the above embodiment, the shell 2100 is provided with an inner cavity 2110, the stator core 1200, the pump body assembly 1100 and the rotor assembly 1000 are arranged in the inner cavity 2110, the rotor core 100 is rotatably arranged in the mounting hole 1210 of the stator core 1200, and the crankshaft 200 is rotatably arranged in the pump body assembly 1100.

[0085] The compressor 2000 of the embodiment of the present invention adopts the rotor assembly 1000 of the above embodiment, and a first baffle ring 510 is provided on the first end face 130 of the rotor core 100, and a second baffle ring 610 is provided on the second end face 140 of the rotor core 100. The first baffle ring 510 blocks the air in the through-hole 120 from flowing toward the area where the first balancing block 300 rotates, while the air in the first gap 2200 flows toward the area where the first balancing block 300 rotates under the action of the first balancing block 300, and the air in the first gap 2200 flows toward the area where the first balancing block 300 rotates ... The ring 610 blocks the air in the first gap 2200 from flowing toward the area through which the second balancing block 400 rotates, while the air in the flow hole 120 will flow toward the area through which the second balancing block 400 rotates under the action of the second balancing block 400, effectively suppressing the occurrence of refrigerant backflow in the flow hole 120, helping the oil to fall back in the second gap 2300, and improving the stability of the oil level in the inner cavity 2110 of the compressor 2000, thereby reducing the wear of the compressor 2000 and extending the service life of the compressor 2000.

[0086] Since the compressor 2000 adopts all the technical solutions of the rotor assembly 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0087] The embodiment of the present utility model further provides a refrigeration device, comprising the compressor 2000 of the above embodiment. In this embodiment, the refrigeration device can be an air conditioner, or a refrigerator, a freezer, etc., which is not limited in this embodiment.

[0088] The refrigeration equipment of the embodiment of the present invention adopts the compressor 2000 of the above embodiment, and suppresses the occurrence of refrigerant backflow in the flow hole 120, so that the oil can more easily fall back in the second gap 2300, thereby improving the stability of the oil level in the inner cavity 2110 of the compressor 2000, reducing the wear of the compressor 2000, improving the operating stability of the refrigeration equipment, and extending the service life of the refrigeration equipment.

[0089] Since the refrigeration equipment adopts all the technical solutions of the compressor 2000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0090] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A rotor assembly, characterized in that: include: The rotor core is provided with an axial hole and a flow hole arranged at intervals, the flow hole penetrates the rotor core along the axial direction of the rotor core, and the rotor core is provided with a first end face and a second end face that are separated from each other, the first end face faces the pump body assembly, and the second end face faces away from the pump body assembly; A crankshaft, one end of which is passed through the shaft hole and the other end is connected to the pump body assembly; a first retaining ring connected to the first end surface, wherein a first through hole is formed inside the first retaining ring for the crankshaft to pass through and communicate with the through hole; a second retaining ring connected to the second end surface; In which, the rotor assembly also includes a first balancing block and a second balancing block. Along the radial direction of the rotor core, the first balancing block is installed on the side of the first retaining ring facing away from the crankshaft, and the second balancing block is installed on the side of the second retaining ring facing the crankshaft.

2. The rotor assembly according to claim 1, wherein: The rotor assembly also includes a first end plate, which is fixed to the first end surface and arranged along the circumference of the rotor core. The inner circumference of the first end plate is connected to the first retaining ring, and the first balancing block is connected to an end of the first end plate facing away from the rotor core.

3. The rotor assembly according to claim 1 or 2, characterized in that: The rotor assembly also includes a second end plate, which is fixed to the second end surface and arranged along the circumference of the rotor core. The second end plate is provided with a second through hole for the crankshaft to pass through and connected with the through hole. The outer circumference of the second end plate is connected to the second retaining ring. The second balancing block is arranged between the hole wall of the second through hole and the second retaining ring. The second balancing block is connected to the end of the second end plate facing away from the rotor core.

4. The rotor assembly according to claim 2, wherein: The rotor assembly further includes a first fastener, which is passed through the first balancing block and the first end plate and is fixedly connected to the rotor core.

5. The rotor assembly according to claim 3, wherein: The rotor assembly further includes a second fastener, which is passed through the second balancing block and the second end plate and is fixedly connected to the rotor core.

6. The rotor assembly according to claim 3, wherein: In the radial direction of the rotor core, the inner edge of the first balancing block is an arc surface, the minimum distance between the inner edge of the first balancing block and the axis of the first through hole is L1, the outer diameter of the first retaining ring is R1, and the following conditions are satisfied: 0mm≤L1-R1≤8mm; the inner diameter of the second retaining ring is R2, the outer edge of the second balancing block is an arc surface, the maximum distance between the outer edge of the second balancing block and the axis of the second through hole is L2, and the following conditions are satisfied: 0mm≤R2-L2≤8mm.

7. The rotor assembly according to claim 6, wherein: The rotor assembly also includes a first end plate, which is fixed to the first end surface and arranged along the circumference of the rotor core. The inner circumference of the first end plate is folded toward the pump body assembly to form the first retaining ring. Along the radial direction of the rotor core, the maximum outer diameter of the rotor core is greater than the outer diameter of the first end plate, and the maximum outer diameter of the rotor core is greater than the outer diameter of the second end plate.

8. The rotor assembly according to claim 1, wherein: Along the axial direction of the rotor core, the height of the first retaining ring is H1, the height of the first balancing block is H2, satisfying: 0.2*H2≤H1≤3*H2, the height of the second retaining ring is H3, the height of the second balancing block is H4, satisfying: 0.2*H4≤H3≤3*H4.

9. The rotor assembly according to claim 1, wherein: Along the axial direction of the rotor core, the height of the first balancing block is H2, the distance between the first balancing block and the pump body assembly is L3, and the height of the first retaining ring is H1, satisfying: H2+L3>H1.

10. The rotor assembly according to claim 1, wherein: There are multiple flow holes, and the multiple flow holes are arranged at intervals along the circumference of the axial hole. In the axial direction of the rotor core, the projection of at least part of the first through hole covers the projection of the multiple through holes, and the projection area of the first through hole is greater than or equal to 0.5 times the sum of the projection areas of all the through holes.

11. A compressor, characterized in that It comprises a housing, a stator core, a pump body assembly and a rotor assembly as described in any one of claims 1 to 10, wherein the stator core, the pump body assembly and the rotor assembly are installed in the housing, the rotor core is rotatably arranged in the stator core mounting hole, and the crankshaft is rotatably arranged in the pump body assembly.

12. Refrigeration equipment, characterized in that Comprising the compressor of claim 11.

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