Rotor assembly, motor and rotary compressor

Abstract

The invention discloses a rotor assembly, a motor and a rotary compressor, the rotor assembly comprises a rotor iron core, the rotor iron core is provided with a plurality of through-flow holes arranged at intervals along the circumferential direction of the rotor iron core, the through-flow holes penetrate through the rotor iron core along the vertical direction, and the rotor assembly further comprises a blocking structure, at least one side of the rotor core in the vertical direction is provided with a blocking structure, and the blocking structure is connected with the rotor core and used for blocking all the through-flow holes, or no through-flow hole is formed in the rotor core. According to the rotor assembly, the downward flowing path of oil gas on the rotor iron core can be blocked, and the internal circulation flow rate of the oil gas in the rotary compressor is reduced, so that the flow and the flow rate of other upward flowing channels of the oil gas can be reduced, and the oil return resistance is reduced; the oil level stability of the rotary compressor during high-frequency operation can be better guaranteed, the working reliability of the rotary compressor is improved, in addition, fool-proof arrangement can be reduced, the structure is simplified, and the assembly efficiency is improved.

Description

Technical Field

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

[0002] In the related technology, the rotary compressor has a motor and a pump body, and the motor is located above the pump body. When the rotary compressor operates at high frequency, the rotor assembly rotates at high speed, and the oil and gas in the flow holes in the upper part of the rotor core will flow downward, increasing the internal circulation of oil and gas in the rotary compressor. At the same time, the channel flow and flow rate of the upward flowing oil and gas are increased, the return oil resistance is large, and the oil and gas separation effect is reduced, making the oil level unstable when the rotary compressor operates at high frequency. Summary of the Invention

[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 provides a rotor assembly that can reduce the internal oil and gas circulation velocity within a rotary compressor, thereby lowering oil return resistance, ensuring oil level stability during high-frequency operation of the rotary compressor, and improving the reliability of the rotary compressor.

[0004] The present invention also provides a motor, comprising the above-mentioned rotor assembly.

[0005] The present invention also provides a rotary compressor, which includes the above-mentioned motor.

[0006] According to an embodiment of the present invention, a rotor assembly is used for a rotary compressor and includes: a rotor core, the rotor core having a plurality of flow holes arranged at intervals along the circumferential direction of the rotor core, the flow holes penetrating the rotor core in the up-down direction, the rotor assembly also including a sealing structure, the sealing structure is provided on at least one side of the rotor core in the up-down direction, the sealing structure is connected to the rotor core, and is used to block all the flow holes, or there are no flow holes on the rotor core.

[0007] According to the rotor assembly of the embodiment of the present invention, by not setting flow holes on the rotor core, or setting flow holes on the rotor core, and providing a blocking structure on at least one side of the rotor core in the upper and lower directions to block all the flow holes, when the rotary compressor is running at high frequency, the path for the downward flow of oil and gas on the rotor core can be blocked, and the internal circulation flow rate of oil and gas in the rotary compressor can be reduced, thereby reducing the flow rate and flow rate of the remaining channels for the upward flow of oil and gas, thereby reducing the return oil resistance, and better ensuring the stability of the oil level when the rotary compressor is running at high frequency, improving the reliability of the rotary compressor. In addition, the anti-foolproof settings can be reduced, the structure is simplified, and the assembly efficiency is improved.

[0008] According to some embodiments of the present invention, when the rotor core has a through-hole and the rotor assembly includes the blocking structure, the blocking structure is provided on the upper side of the rotor core.

[0009] In some embodiments of the present invention, a flow guide structure is also included, which includes: a fixed plate, which is arranged on the upper side of the rotor core and connected to the rotor core, and the fixed plate is used to be configured as the blocking structure when the blocking structure is provided on the upper side of the rotor core; an annular plate, the axis of the annular plate extends in the up and down directions, and the lower end of the annular plate is connected to the outer periphery of the fixed plate.

[0010] In some embodiments of the present invention, the rotor assembly further comprises: an upper balancing weight, the upper balancing weight being located above the fixing plate and connected to the fixing plate, and the upper balancing weight being located inside the annular plate.

[0011] In some embodiments of the present invention, the upper end of the annular plate is higher than the upper end surface of the upper balancing block.

[0012] In some embodiments of the present invention, the upper end of the annular plate is higher than the upper end surface of the upper balancing block by a dimension h, where h is ≥ 3 mm.

[0013] According to some embodiments of the present invention, the rotor assembly further includes: a lower balancing block, which is arranged on the lower side of the rotor core and connected to the rotor core, the lower balancing block including a lower balancing portion, the lower balancing portion including a main body and a windward portion, the windward portion being located on a side of the main body close to the windward end of the lower balancing portion, and the cross-sectional area of ​​the windward portion gradually increases in the opposite direction to the rotation direction of the rotor core.

[0014] In some embodiments of the present invention, the lower balancing portion has an inner surface and an outer surface arranged opposite to each other in the radial direction of the rotor core, the inner surface is located on the side of the outer surface close to the axis of the rotor core, and the inner surface and the outer surface intersect at the windward end of the windward portion.

[0015] In some embodiments of the present invention, the inner surface and the outer surface are arranged perpendicular to the horizontal plane; or, the inner surface and the outer surface both include a vertical surface and an inclined surface, the vertical surface is located above the inclined surface, and the vertical surface is perpendicular to the horizontal plane, and in the top-to-bottom direction, the two inclined surfaces of the inner surface and the outer surface are inclined in a direction close to each other.

[0016] In some embodiments of the present invention, when the rotor core has a flow hole and the rotor assembly includes the sealing structure, the lower balancing block further includes: a sealing portion, which is provided on the lower side of the rotor core and connected to the rotor core, and the sealing portion is used to be constructed into the sealing structure when the sealing structure is provided on the lower side of the rotor core, and the lower balancing portion is provided below the sealing portion and connected to the sealing portion.

[0017] According to some embodiments of the present invention, when the rotor core has a through hole and the rotor assembly includes the blocking structure, the blocking structure is provided on the lower side of the rotor core.

[0018] In some embodiments of the present invention, the sealing structure has multiple oil drain holes, the multiple oil drain holes correspond one-to-one to the multiple flow holes, one end of the multiple oil drain holes is respectively connected to the multiple flow holes, and the other end of the multiple oil drain holes is located on the outer peripheral wall of the sealing structure.

[0019] In some embodiments of the present invention, the oil drain hole includes a first hole segment and a second hole segment, the first hole segment extends in the up-down direction and the upper end is connected to the flow hole, the second hole segment extends in the radial direction of the rotor core, one end of the second hole segment is connected to the lower end of the first hole segment, and the other end is located on the outer peripheral wall of the sealing structure.

[0020] In some embodiments of the present invention, the diameter of the oil drain hole is greater than or equal to 1.5 mm.

[0021] The motor according to an embodiment of the present invention is used in a rotary compressor and includes: a stator assembly; and the above-mentioned rotor assembly, wherein the rotor assembly is rotatably disposed in the stator assembly.

[0022] According to the motor of an embodiment of the present invention, by setting the above-mentioned rotor assembly, no flow holes are set on the rotor core, or flow holes are set on the rotor core, and a blocking structure is provided on at least one side of the rotor core in the upper and lower directions to block all the flow holes. When the rotary compressor is running at high frequency, the path for the downward flow of oil and gas on the rotor core can be blocked, and the internal circulation flow rate of oil and gas in the rotary compressor can be reduced, thereby reducing the flow rate and flow rate of the remaining channels for the upward flow of oil and gas, thereby reducing the return oil resistance, and better ensuring the stability of the oil level when the rotary compressor is running at high frequency, improving the reliability of the operation of the rotary compressor, and further reducing the anti-fouling settings, simplifying the structure, and improving the assembly efficiency.

[0023] In some embodiments of the present invention, the stator assembly includes: a stator core; a winding, wherein the winding is wound on the stator core, and the winding includes a plurality of coils spaced apart along the circumferential direction of the stator core, and the gap H between any two adjacent coils is greater than or equal to 2 mm.

[0024] A rotary compressor according to an embodiment of the present invention includes the above-mentioned motor.

[0025] According to the rotary compressor of an embodiment of the present invention, by setting the above-mentioned motor, the motor includes the above-mentioned rotor assembly, no flow holes are set on the rotor core, or flow holes are set on the rotor core, and a blocking structure is provided on at least one side of the rotor core in the upper and lower directions to block all the flow holes. When the rotary compressor is running at high frequency, the path for the downward flow of oil and gas on the rotor core can be blocked, and the internal circulation flow rate of oil and gas in the rotary compressor can be reduced, thereby reducing the flow rate and flow rate of the remaining channels for the upward flow of oil and gas, thereby reducing the return oil resistance, and can better ensure the stability of the oil level when the rotary compressor is running at high frequency, improve the reliability of the operation of the rotary compressor, and also can reduce the anti-foolproof settings, simplify the structure, and improve the assembly efficiency.

[0026] In some embodiments of the present invention, the rotary compressor is a single-cylinder rotary compressor.

[0027] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0029] Figure 1 is a cross-sectional view of a rotary compressor according to an embodiment of the present invention;

[0030] Figure 2 is a partially enlarged cross-sectional view of a rotary compressor according to an embodiment of the present invention;

[0031] Figure 3 is a top view of a motor according to an embodiment of the present invention;

[0032] Figure 4 is a top view of a rotor assembly according to an embodiment of the present invention;

[0033] Figure 5 is a top view of a rotor assembly according to another embodiment of the present invention;

[0034] Figure 6 is a perspective view of a lower balancing weight of a rotor assembly according to an embodiment of the present invention;

[0035] Figure 7 is a perspective view of a lower balancing weight of a rotor assembly according to another embodiment of the present invention.

[0036] Reference numerals:

[0037] 1000, rotary compressor;

[0038] 100. Motor;

[0039] 10. Rotor assembly;

[0040] 1. Rotor core;

[0041] 2. flow guide structure; 21. fixed plate; 22. annular plate;

[0042] 3. Upper balance block;

[0043] 4. Lower balancing block; 41. Lower balancing portion; 42. Main body; 43. Windward portion; 44. Leeward portion; 45. Inner surface; 46. Outer surface; 47. Vertical surface; 48. Inclined surface;

[0044] 20. stator assembly; 201. stator core; 202. winding; 203. coil;

[0045] 200, housing; 2001, upper housing; 2002, middle housing; 2003, lower housing; 2004, exhaust port; 2005, intake port;

[0046] 300, pump body; 3001, upper bearing; 3002, lower bearing; 3003, cylinder; 3004, crankshaft; 3005, upper muffler; 3006, lower muffler;

[0047] 400. Liquid reservoir. DETAILED DESCRIPTION

[0048] 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.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0050] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0051] The rotor assembly 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The rotor assembly 10 is used in a rotary compressor 1000 .

[0052] like Figure 1 As shown, the rotary compressor 1000 includes a housing 200 , a motor 100 and a pump body 300 . The housing 200 has an air intake 2005 and an air discharge 2004 . The motor 100 and the pump body 300 are located inside the housing 200 , and the motor 100 is located above the pump body 300 .

[0053] Specifically, the shell 200 includes an upper shell 2001, a middle shell 2002 and a lower shell 2003. The upper and lower ends of the middle shell 2002 are open, the upper shell 2001 is connected to the upper end of the middle shell 2002, and the lower shell 2003 is connected to the lower end of the middle shell 2002. The exhaust port 2004 is provided at the upper end of the upper shell 2001, and the air intake port 2005 is provided on the peripheral wall of the middle shell 2002.

[0054] The pump body 300 is used to compress the refrigerant, converting low-temperature, low-pressure refrigerant into high-temperature, high-pressure refrigerant. The pump body 300 is connected to the housing 200 and includes an upper bearing 3001, a lower bearing 3002, a cylinder 3003, and a crankshaft 3004. The cylinder 3003 is located between the upper and lower bearings 3001 and 3002. A compression chamber is defined within the cylinder 3003, and the intake port 2005 is connected to the compression chamber. The crankshaft 3004 extends vertically and penetrates the upper and lower bearings 3001, 3002, and cylinder 3003. The crankshaft 3004 has an eccentric portion located within the compression chamber. Furthermore, a sliding vane may be provided within the cylinder 3003, movable radially within the cylinder 3003 and abutting the eccentric portion.

[0055] Further, if Figure 1 As shown, the pump body 300 can also include an upper muffler 3005 and a lower muffler 3006. The upper muffler 3005 is arranged on the upper side of the upper bearing 3001 and is connected to the upper bearing 3001. The lower muffler 3006 is arranged on the lower side of the lower bearing 3002 and is connected to the lower bearing 3002, so as to reduce the noise of the gas flow process.

[0056] like Figure 1-Figure 3 As shown, the motor 100 is arranged above the pump body 300. The motor 100 includes a stator assembly 20 and a rotor assembly 10. The stator assembly 20 is connected to the housing 200. The rotor assembly 10 is rotatably arranged in the stator assembly 20. The rotor assembly 10 is sleeved on the upper end of the crankshaft 3004 and connected to the crankshaft 3004, and is used to drive the crankshaft 3004 to rotate, thereby realizing the compression of the refrigerant by the pump body 300.

[0057] In addition, if Figure 1 As shown, the rotary compressor 1000 may further include a liquid reservoir 400, which is located on one side of the rotary compressor 1000 in the horizontal direction. The liquid reservoir 400 is used to separate the oil and gas of the refrigerant entering the air intake port 2005 to avoid the problem of liquid hammer in the rotary compressor 1000. Specifically, a connecting pipe 401 is connected between the liquid reservoir 400 and the air intake port 2005. One end of the connecting pipe 401 is connected to the air intake port 2005, and the other end extends from the bottom of the liquid reservoir 400 into the liquid reservoir 400 and extends upward. The liquid reservoir 400 has an oil-gas separation structure 402 inside, and the oil-gas separation structure 402 is located above the connecting pipe. An inlet 403 is provided at the upper end of the liquid reservoir 400. The refrigerant enters the liquid reservoir 400 from the inlet 403, and oil and gas separation is achieved under the action of the oil-gas separation structure 402. The gas after oil and gas separation can enter the air intake 2005 through the connecting pipe 401. The oil and liquid after oil and gas separation are collected at the bottom of the liquid reservoir 400 under the action of gravity.

[0058] A rotor assembly 10 according to an embodiment of the present invention includes a rotor core 1 .

[0059] Specifically, such as Figure 5 As shown, the rotor core 1 has a plurality of through holes (not shown) spaced apart along the circumferential direction of the rotor core 1. The through holes penetrate the rotor core 1 in the vertical direction. The rotor assembly 10 further includes a blocking structure. The blocking structure is provided on at least one side of the rotor core 1 in the vertical direction. The blocking structure is connected to the rotor core 1 and is used to block all the through holes, or, as shown in FIG. Figure 4 As shown, there are no through holes on the rotor core 1.

[0060] In the related art, a through hole is generally provided on the rotor core for circulating refrigerant and cooling oil liquid. When the rotary compressor operates at different frequencies, the flow state of the oil and gas in the through hole is unstable. When the rotary compressor operates at a high frequency, the rotation speed of the rotor assembly is relatively high. At this time, part of the oil and gas in the through hole will flow upward to the exhaust port of the rotary compressor, and part of the oil and gas will flow back downward. The backflow state will cause the flow rate of the remaining upward flow channels of the motor to increase, and the flow rate will increase accordingly. The return oil resistance is large, making the oil level unstable when the rotary compressor operates at a high frequency, and causing the rotary compressor to have a high oil discharge rate.

[0061] In the present invention, no flow holes are provided on the rotor core 1 or when the flow holes are normally provided, all the flow holes are blocked by a sealing structure. On the basis of a fixed exhaust volume of the rotary compressor 1000, the path for the downward flow of oil and gas on the rotor core 1 is reduced, and the internal circulation of oil and gas in the rotary compressor 1000 is reduced, thereby reducing the flow rate and flow velocity of the remaining upward flow channels of oil and gas, thereby reducing the return oil resistance, and better ensuring the stability of the oil level when the rotary compressor 1000 is running at high frequency, thereby improving the reliability of the operation of the rotary compressor 1000.

[0062] In addition, in the present invention, the flow holes are completely blocked by the blocking structure. During the processing and assembly process, there is no need to consider the problem of incorrect assembly angle of the blocking structure, and the anti-foolproof setting can be omitted. While improving the assembly efficiency, the anti-foolproof structure on the structure can be reduced, thereby improving production efficiency and reducing production costs.

[0063] For example, in Figure 4 In the example shown, the rotor core 1 is not provided with a through hole. Figure 5 In the example shown, a blocking structure is provided on the upper side of the rotor core 1 , which blocks all the through-holes, thereby preventing the refrigerant and cooling oil from flowing through the through-holes on the rotor core 1 .

[0064] In addition, the rotor core 1 is provided with a plurality of magnetic steel slots, which are spaced apart along the circumference of the rotor core 1. The rotor assembly 10 may include a plurality of magnets, each of which may be disposed within the plurality of magnetic steel slots. When a through hole is provided in the rotor core 1, the through hole may be multiple, spaced apart along the circumference of the rotor core 1, and located radially inward of the magnetic steel slots.

[0065] Optionally, the shape of the through-hole can be circular, oblong, polygonal or the like.

[0066] According to the rotor assembly 10 of an embodiment of the present invention, by not setting flow holes on the rotor core 1, or setting flow holes on the rotor core 1, and providing a blocking structure on at least one side of the rotor core 1 in the upper and lower directions to block all the flow holes, when the rotary compressor 1000 is running at high frequency, the path for the downward flow of oil and gas on the rotor core 1 can be blocked, and the internal circulation flow rate of oil and gas in the rotary compressor 1000 can be reduced, thereby reducing the flow rate and flow rate of the remaining channels for the upward flow of oil and gas, thereby reducing the return oil resistance, and better ensuring the stability of the oil level when the rotary compressor 1000 is running at high frequency, improving the reliability of the operation of the rotary compressor 1000, and further reducing the anti-foolproof settings, simplifying the structure, and improving the assembly efficiency.

[0067] In some embodiments of the present invention, Figure 5 As shown, when the rotor core 1 has a through-hole and the rotor assembly 10 includes a sealing structure, the sealing structure is provided on the upper side of the rotor core 1. The sealing structure can block the upper end opening of the through-hole on the upper side, thereby preventing oil from entering the through-hole from the upper opening and collecting in the through-hole instead of flowing into the oil pool at the bottom of the housing 200. This can better ensure the stability of the oil level when the rotary compressor 1000 is operating at high frequency, thereby improving the reliability of the rotary compressor 1000.

[0068] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the rotor assembly 10 also includes a flow guide structure 2, which includes a fixed plate 21 and an annular plate 22. The fixed plate 21 is provided on the upper side of the rotor core 1 and is connected to the rotor core 1. The fixed plate 21 is annular and perpendicular to the up and down directions. The fixed plate 21 is used to be configured as a sealing structure to block all flow holes when a sealing structure is provided on the upper side of the rotor core 1. The axis of the annular plate 22 extends in the up and down directions. The lower end of the annular plate 22 is connected to the outer periphery of the fixed plate 21, and the upper end extends upward.

[0069] Among them, the guide structure 2 can be used to achieve oil and gas separation above the motor 100. The guide structure 2 can accelerate the speed of oil and gas in the direction perpendicular to the axis of the motor 100, that is, in the horizontal direction. Since the density of the oil is greater than the density of the refrigerant, the oil and gas can be separated during the flow process.

[0070] like Figure 1-Figure 3 As shown, a stator assembly 20 is disposed outside the rotor assembly 10. The stator assembly 20 includes a stator core 201 and a winding 202 wound around the stator core 201. The winding 202 includes multiple coils 203 spaced apart along the circumference of the stator core 201, with gaps between adjacent coils 203. A gap is also formed between the stator assembly 20 and the inner circumferential wall of the housing 200. For example, the outer circumferential wall of the stator core 201 is non-circular and may have cut edges, thereby forming a gap between the outer circumferential wall of the stator core 201 and the inner circumferential wall of the housing 200. After oil and gas separation, most of the oil can flow downward through the gaps between the coils 203 and return to the oil pool. A small portion can also flow downward through the gap between the stator assembly 20 and the housing 200 and return to the oil pool.

[0071] It should be noted that the higher the height of the annular plate 22, the better. The higher the height of the annular plate 22, the better the acceleration effect of the oil and gas in the horizontal direction, and the better the oil and gas separation effect. However, considering the volume of the rotary compressor 1000, the height of the annular plate 22 cannot be too high.

[0072] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the rotor assembly 10 also includes an upper balancing weight 3, which is located above and connected to the fixed plate 21 and is located inside the annular plate 22. The provision of the upper balancing weight 3 can reduce vibration caused by uneven mass distribution during high-speed rotation of the rotor assembly 10, thereby ensuring the smooth and reliable operation of the rotary compressor 1000. The placement of the upper balancing weight 3 above the fixed plate 21 and inside the annular plate 22 facilitates the arrangement of the upper balancing weight 3 and the flow guide structure 2.

[0073] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the upper balancing block 3, the flow guide structure 2 and the rotor core 1 are connected by the same first fastener 5. The first fastener 5 can be passed through the upper balancing block 3, the fixing plate 21 and the rotor core 1 in sequence from top to bottom, so that the upper balancing block 3 and the flow guide structure 2 are both fixed on the rotor core 1.

[0074] Optionally, there are multiple first fasteners 5 arranged at intervals along the circumferential direction of the rotor core 1 .

[0075] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the upper end of the annular plate 22 is higher than the upper end surface of the upper balancing weight 3. As a result, the upper balancing weight 3 can be completely retained by the guide structure 2, which can reduce the wind resistance of the upper balancing weight 3, thereby reducing power consumption, vibration and noise, improving the performance of the rotary compressor 1000, and extending the life of the rotary compressor 1000.

[0076] Further, if Figure 1 and Figure 2 As shown, the upper end of the annular plate 22 is elevated above the upper end surface of the upper balance weight 3 by a dimension h, where h ≥ 3 mm. For example, the dimension h by which the upper end of the annular plate 22 is elevated above the upper balance weight 3 can be 3.2 mm, 3.5 mm, 3.7 mm, 4 mm, 4.3 mm, 4.5 mm, 4.7 mm, or 5 mm, among others. This accelerates the horizontal velocity of the oil and gas, improving the oil-gas separation effect. Of course, it should be noted that the upper end of the annular plate 22 should not be too high above the upper flat block to facilitate production and processing, while also avoiding interference with the lead wires of the stator assembly 20.

[0077] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, reference Figure 6 and Figure 7 The rotor assembly 10 further includes a lower balancing mass 4, which is disposed on the lower side of the rotor core 1 and connected to the rotor core 1. The lower balancing mass 4 includes a lower balancing portion 41, which includes a main portion 42 and a windward portion 43. The windward portion 43 is located on the side of the main portion 42 near the windward end of the lower balancing portion 41. The cross-sectional area of ​​the windward portion 43 gradually increases in the direction opposite to the rotation direction of the rotor core 1. This reduces the wind resistance of the lower balancing mass 4.

[0078] Since the lower balancing weight 4 is located at the lower end of the rotor core 1, when the rotor assembly 10 rotates, the lower balancing weight 4 will form a flow field as it rotates to stir up the oil surface. The more the lower balancing weight 4 stirs the oil surface, the less oil there is in the oil pool. The lower balancing weight 4 adopts a low wind resistance form, which reduces the disturbance ability of the lower balancing weight 4 and reduces the speed at which the oil flows upward, which is beneficial to ensuring the stability of the oil surface.

[0079] In addition, after the wind resistance of the lower balancing block 4 is reduced, power consumption can be reduced, vibration and noise can be reduced, the performance of the rotary compressor 1000 can be improved, and the life of the rotary compressor 1000 can be extended.

[0080] It should be noted that the lower balancing portion 41 of the lower balancing block 4 and the upper balancing block 3 are located on opposite sides of the axis of the rotor core 1, thereby balancing the inertial force generated by the rotor core 1 during rotation, thereby reducing vibration, and the upper balancing block 3 and the lower balancing block 4 can form a pair of couples for balancing the inertial moment generated by the rotor core 1, which helps to ensure that the rotor core 1 remains stable during rotation and reduces vibration and noise caused by unbalanced inertial moment. In addition, by arranging the upper balancing block 3 and the lower balancing block 4 on opposite sides, the mass distribution of the rotor assembly 10 can be adjusted more flexibly to adapt to different working conditions and operating requirements, which helps to optimize the balancing effect and improve the operating stability and reliability of the rotary compressor 1000.

[0081] In some embodiments of the present invention, Figure 6 As shown, the end of the main body 42 facing away from the windward portion 43 is connected to a leeward portion 44. The cross-sectional area of ​​the leeward portion 44 gradually decreases in the direction from the main body 42 to the leeward portion 44, while the cross-sectional area of ​​the main body 42 remains unchanged. The leeward portion 44 and the windward portion 43 have the same structure. This allows for improved installation efficiency of the rotor assembly 10 by not distinguishing between the windward portion 43 and the leeward portion 44 during installation. Furthermore, the gradually decreasing cross-sectional area of ​​the leeward portion 44 reduces airflow resistance, reduces vibration and noise, and improves the operational stability and reliability of the rotary compressor 1000.

[0082] In some embodiments of the present invention, Figure 6 and Figure 7 As shown, the lower balancing portion 41 has an inner surface 45 and an outer surface 46 that are arranged opposite each other in the radial direction of the rotor core 1. The inner surface 45 is located on the side of the outer surface 46 that is closer to the axis of the rotor core 1. The inner surface 45 and the outer surface 46 intersect at the windward end of the windward portion 43. As a result, the windward end of the lower balancing weight 4 is formed into a vertically extending straight line, which can better reduce wind resistance, reduce the disturbance ability of the lower balancing weight 4, and reduce the speed of the upward flow of oil, which is beneficial to ensuring the stability of the oil level. At the same time, it reduces power consumption, vibration and noise, improves the performance of the rotary compressor 1000, and extends the life of the rotary compressor 1000.

[0083] In some embodiments of the present invention, Figure 6 As shown, the inner surface 45 and the outer surface 46 are arranged perpendicular to the horizontal plane, thereby reducing the height of the lower balance block 4 under the same mass, making the lower balance block 4 farther away from the oil surface, and reducing the influence of the vortex formed during the rotation of the lower balance block 4 on the oil surface disturbance, thereby reducing the speed of the upward flow of the oil, which is beneficial to ensure the stability of the oil surface.

[0084] In some embodiments of the present invention, Figure 7As shown, both inner surface 45 and outer surface 46 include a vertical surface 47 and an inclined surface 48. Vertical surface 47 is located above inclined surface 48 and is perpendicular to the horizontal plane. From top to bottom, the two inclined surfaces 48 of inner surface 45 and outer surface 46 are inclined toward each other. This can further reduce the wind resistance during the rotation of lower balancing weight 4, reduce the disturbance capacity of lower balancing weight 4, and reduce the speed of oil flowing upward, which is conducive to ensuring the stability of the oil level. At the same time, it reduces power consumption, vibration and noise, improves the performance of rotary compressor 1000, and extends the life of rotary compressor 1000.

[0085] Further, if Figure 7 As shown, the two vertical surfaces 47 of the inner surface 45 and the outer surface 46 have the same height, and the two inclined surfaces 48 of the inner surface 45 and the outer surface 46 have the same inclination angle relative to the vertical direction.

[0086] In some embodiments of the present invention, the lower balancing block 4 further includes a blocking portion, which is provided on the lower side of the rotor core 1 and connected to the rotor core 1. The blocking portion is configured to be a blocking structure when a blocking structure is provided on the lower side of the rotor core 1. The lower balancing portion 41 is provided below the blocking portion and connected to the blocking portion. The blocking portion may be an annular shape provided around the crankshaft 3004. The blocking portion may completely block the flow holes from below. On the basis of a fixed exhaust volume of the rotary compressor 1000, the path for the downward flow of oil and gas on the rotor core 1 is reduced, and the internal circulation of oil and gas in the rotary compressor 1000 is reduced, thereby reducing the flow rate and flow velocity of the remaining upward flow channels of oil and gas, thereby reducing the oil return resistance, and better ensuring the stability of the oil level when the rotary compressor 1000 is operating at high frequency, thereby improving the reliability of the rotary compressor 1000.

[0087] Furthermore, in the present invention, by providing a sealing portion on the lower balancing weight 4 to seal the flow holes, a separate sealing structure can be avoided, reducing the number of parts and improving production and assembly efficiency. Furthermore, the sealing portion can be connected to the rotor core 1, and the lower end of the first fastener 5 can be inserted through the sealing portion, thereby improving the reliability of the connection between the lower balancing weight 4 and the rotor core 1.

[0088] Optionally, the sealing portion and the lower balancing weight 4 are an integrally formed part.

[0089] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the lower balancing block 4 is connected to the rotor core 1 via a second fastener 6 , which is sequentially passed through the lower balancing block 4 and the rotor core 1 from bottom to top to achieve the connection between the lower balancing block 4 and the rotor core 1 .

[0090] In some embodiments of the present invention, when the rotor core 1 has flow holes and the rotor assembly 10 includes a sealing structure, the sealing structure is provided on the underside of the rotor core 1. In this case, the lower balancing weight 4 can be positioned below and connected to the sealing structure. For example, the second fastener 6 can also be inserted through the sealing structure to secure it.

[0091] Furthermore, the sealing structure includes multiple oil drain holes, each corresponding to the multiple through-holes. One end of each of the oil drain holes is connected to each of the through-holes, and the other ends of the oil drain holes are located on the outer peripheral wall of the sealing structure. Because the lower ends of the through-holes are blocked, when oil collects in the through-holes, the collected oil can flow out through the oil drain holes and back into the oil pool, thereby maintaining a stable oil level.

[0092] It should be noted that when sealing structures are provided at both the upper and lower ends of the rotor core 1, the oil cannot flow into the flow hole because the sealing structure provided at the upper end of the rotor core 1 blocks the upper open mouth of the flow hole. At this time, the oil drain hole may not be provided on the sealing structure located at the lower end of the rotor core 1.

[0093] In some embodiments of the present invention, the oil drain hole includes a first hole segment and a second hole segment. The first hole segment extends vertically and communicates with the flow hole at its upper end. The second hole segment extends radially of the rotor core 1. One end of the second hole segment communicates with the lower end of the first hole segment, and the other end is located on the outer peripheral wall of the blocking structure. This facilitates the machining of the oil drain hole, improves the machining efficiency of the lower balancing weight 4, and reduces production costs.

[0094] Optionally, the oil drain hole has a diameter greater than or equal to 1.5 mm. This allows the oil collected in the through-hole to flow out of the through-hole and back into the oil pool more effectively and quickly. For example, the oil drain hole diameter may be 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc. The diameter of the first hole segment and the diameter of the second hole segment may be the same or different. In the present invention, the diameters of the first hole segment and the second hole segment are the same.

[0095] The motor 100 according to an embodiment of the present invention will be described below.

[0096] The motor 100 according to the embodiment of the present invention is used in a rotary compressor 1000 and includes a stator assembly 20 and the aforementioned rotor assembly 10 . The rotor assembly 10 is rotatably disposed in the stator assembly 20 .

[0097] According to the motor 100 of an embodiment of the present invention, by setting the above-mentioned rotor assembly 10, no flow holes are set on the rotor core 1, or flow holes are set on the rotor core 1, and a blocking structure is provided on at least one side of the rotor core 1 in the upper and lower directions to block all the flow holes. When the rotary compressor 1000 is running at high frequency, the path for the downward flow of oil and gas on the rotor core 1 can be blocked, and the internal circulation flow rate of oil and gas in the rotary compressor 1000 can be reduced, thereby reducing the flow rate and flow rate of the remaining channels for the upward flow of oil and gas, thereby reducing the return oil resistance, and better ensuring the stability of the oil level when the rotary compressor 1000 is running at high frequency, thereby improving the reliability of the operation of the rotary compressor 1000, and further reducing the anti-foolproof settings, simplifying the structure, and improving the assembly efficiency.

[0098] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the stator assembly 20 includes a stator core 201 and windings 202. The stator core 201 includes a yoke and teeth. The yoke is annular, and the teeth are multiple. The teeth are arranged on the inner circumferential wall of the yoke and spaced apart along the circumference of the yoke, with stator slots formed between adjacent teeth. The windings 202 are wound around the stator core 201, specifically around the stator teeth. The windings 202 include multiple coils 203 spaced apart along the circumference of the stator core 201. The coils 203 correspond one-to-one to the stator teeth, and the coils 203 are respectively wound around the stator teeth.

[0099] The gap H between any two adjacent windings 203 along the circumferential direction of the stator core 201 is greater than or equal to 2 mm. The oil after oil and gas separation above the rotor assembly 10 needs to flow back to the oil pool through the gaps between the windings 203. A gap H of greater than or equal to 2 mm between any two adjacent windings 203 ensures that the oil after oil and gas separation can flow smoothly back into the oil pool under the action of gravity. For example, the gap H between any two adjacent windings 203 along the circumferential direction of the stator core 201 can be 2.3 mm, 2.5 mm, 2.7 mm, 3 mm, 3.3 mm, 3.5 mm, 3.7 mm, or 4 mm, etc.

[0100] The following describes a rotary compressor 1000 according to an embodiment of the present invention.

[0101] The rotary compressor 1000 according to the embodiment of the present invention includes the motor 100 described above.

[0102] According to the rotary compressor 1000 of an embodiment of the present invention, by setting the above-mentioned motor 100, the motor 100 includes the above-mentioned rotor assembly 10, and no flow holes are set on the rotor core 1, or flow holes are set on the rotor core 1, and a blocking structure is provided on at least one side of the rotor core 1 in the upper and lower directions to block all the flow holes. When the rotary compressor 1000 is running at high frequency, the path for the downward flow of oil and gas on the rotor core 1 can be blocked, and the internal circulation flow rate of oil and gas in the rotary compressor 1000 can be reduced, thereby reducing the flow rate and flow rate of the remaining channels for the upward flow of oil and gas, thereby reducing the return oil resistance, and can better ensure the stability of the oil level when the rotary compressor 1000 is running at high frequency, improve the reliability of the operation of the rotary compressor 1000, and further reduce the anti-foolproof settings, simplify the structure, and improve the assembly efficiency.

[0103] In some embodiments of the present invention, the rotary compressor 1000 is a single-cylinder rotary compressor, that is, the pump body 300 has one cylinder 3003 and one compression chamber. When the rotary compressor 1000 is a single-cylinder rotary compressor, the lower balancing block 4 at the lower end of the rotor assembly 10 is very large. When the rotary compressor 1000 operates at a high frequency and the rotor assembly 10 operates at a high speed, the disturbance of the lower balancing block 4 is very large, and it is not easy to maintain a stable oil level. In this case, blocking the flow holes on the rotor and setting the lower balancing block 4 to a low wind resistance form can greatly improve the problem of unstable oil level in the single-cylinder rotary compressor 1000.

[0104] Of course, the rotary compressor 1000 can be a multi-cylinder rotary compressor, in which case there are multiple cylinders 3003, multiple compression chambers, and multiple eccentric portions, and a partition can be provided between two adjacent cylinders 3003. For example, the rotary compressor 1000 is a two-cylinder rotary compressor, in which there are two cylinders 3003, and a partition is provided between the two cylinders 3003. When the rotary compressor 1000 is a multi-cylinder rotary compressor, the lower balancing weight 4 is relatively small in size, causing relatively little disturbance to the oil level and having relatively little impact on the oil level. In this case, blocking the rotating flow hole and configuring the lower balancing weight 4 in a low-drag configuration can further improve the problem of unstable oil level.

[0105] In some embodiments of the present invention, the rotary compressor 1000 may be used in refrigeration equipment such as an air conditioner or a refrigerator, which is not limited here.

[0106] Other structures and operations of the rotary compressor 1000 according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0107] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0108] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A rotor assembly, characterized in that: For use with a rotary compressor and comprising: rotor core, The rotor core has a plurality of flow holes arranged at intervals along the circumferential direction of the rotor core, and the flow holes penetrate the rotor core in the up-down direction. The rotor assembly also includes a sealing structure, and the sealing structure is provided on at least one side of the rotor core in the up-down direction. The sealing structure is connected to the rotor core and is used to block all the flow holes, or there are no flow holes on the rotor core.

2. The rotor assembly according to claim 1, wherein: When the rotor core has a through hole and the rotor assembly includes the blocking structure, the blocking structure is provided on the upper side of the rotor core.

3. The rotor assembly according to claim 1 or 2, characterized in that: It also includes a flow guiding structure, which includes: a fixing plate, the fixing plate being provided on the upper side of the rotor core and connected to the rotor core, the fixing plate being configured to form the blocking structure when the blocking structure is provided on the upper side of the rotor core; The annular plate has an axis extending in the up-down direction, and the lower end of the annular plate is connected to the outer periphery of the fixed plate.

4. The rotor assembly according to claim 3, wherein: The rotor assembly further comprises: An upper balancing block is located above the fixing plate and connected to the fixing plate, and the upper balancing block is located inside the annular plate.

5. The rotor assembly according to claim 4, wherein: The upper end of the annular plate is higher than the upper end surface of the upper balancing block.

6. The rotor assembly according to claim 5, wherein: The upper end of the annular plate is higher than the upper end surface of the upper balancing block by a dimension h, where h is ≥ 3 mm.

7. The rotor assembly according to claim 1, wherein: The rotor assembly further comprises: The lower balancing block is arranged on the lower side of the rotor core and is connected to the rotor core. The lower balancing block includes a lower balancing part. The lower balancing part includes a main body and a windward part. The windward part is located on the side of the main body close to the windward end of the lower balancing part. Along the opposite direction of the rotation direction of the rotor core, the cross-sectional area of ​​the windward part gradually increases.

8. The rotor assembly according to claim 7, wherein: The lower balancing portion has an inner surface and an outer surface arranged opposite to each other in the radial direction of the rotor core, the inner surface is located on a side of the outer surface close to the axis of the rotor core, and the inner surface and the outer surface intersect at the windward end of the windward portion.

9. The rotor assembly according to claim 8, wherein: The inner surface and the outer surface are arranged perpendicular to the horizontal plane; Alternatively, the inner surface and the outer surface both include a vertical surface and an inclined surface, the vertical surface is located above the inclined surface, the vertical surface is perpendicular to the horizontal surface, and in the top-to-bottom direction, the two inclined surfaces of the inner surface and the outer surface are inclined toward each other.

10. The rotor assembly according to claim 7, wherein: The lower balancing mass further comprises: The blocking portion is arranged on the lower side of the rotor core and connected to the rotor core. The blocking portion is used to be constructed into the blocking structure when the blocking structure is provided on the lower side of the rotor core. The lower balancing portion is arranged below the blocking portion and connected to the blocking portion.

11. The rotor assembly according to claim 1, wherein: When the rotor core has a through hole and the rotor assembly includes the blocking structure, the blocking structure is provided on the lower side of the rotor core.

12. The rotor assembly according to claim 10 or 11, characterized in that: The sealing structure has multiple oil drain holes, which correspond one-to-one to the multiple flow holes. One end of the multiple oil drain holes is connected to the multiple flow holes respectively, and the other end of the multiple oil drain holes is located on the outer peripheral wall of the sealing structure.

13. The rotor assembly according to claim 12, wherein: The oil drain hole includes a first hole segment and a second hole segment. The first hole segment extends in the up-down direction and the upper end is connected to the flow hole. The second hole segment extends in the radial direction of the rotor core. One end of the second hole segment is connected to the lower end of the first hole segment, and the other end is located on the outer peripheral wall of the sealing structure.

14. The rotor assembly according to claim 12, wherein: The diameter of the oil drain hole is greater than or equal to 1.5 mm.

15. A motor, characterized in that: For use with a rotary compressor and comprising: stator assembly; The rotor assembly according to any one of claims 1 to 14, wherein the rotor assembly is rotatably disposed within the stator assembly.

16. The motor according to claim 15, characterized in that The stator assembly comprises: stator core; The winding is wound on the stator core, and the winding includes a plurality of coils spaced apart along the circumferential direction of the stator core, wherein the gap H between any two adjacent coils is greater than or equal to 2 mm.

17. A rotary compressor, characterized in that: Comprising an electric machine according to claim 15 or 16.

18. The rotary compressor according to claim 17, wherein The rotary compressor is a single-cylinder rotary compressor.

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