Motor assembly and compressor
Patent Information
- Application Number
- CN202522429658.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-17
AI Technical Summary
During compressor operation, the lubricating oil cannot flow back to the lower oil sump in time, resulting in a drop in oil level, which affects crankshaft wear and increases oil discharge rate, thus affecting the energy efficiency of the refrigeration system.
Design a motor assembly including an oil baffle and a balancer. The oil baffle consists of an annular plate and an extension plate. The annular plate blocks the lubricating oil from rising, and the extension plate increases the fluid rotation speed, so that the lubricating oil is separated from the refrigerant and falls back into the oil sump.
It improves the compressor's oil return capability, reduces the oil discharge rate, ensures the stability of the oil sump level, and enhances the energy efficiency of the refrigeration system.
Smart Images
Figure CN224935490U_ABST
Abstract
Description
Technical Field
[0001] The present utility model relates to the technical field of compressors, and specifically relates to a motor assembly and a compressor. Background Art
[0002] During the operation of the compressor, the lubricating oil in the lower oil sump enters the upper chamber of the compressor due to reasons such as oil pumping by the crankshaft, entrainment by the rotation of the motor, and evaporation of liquid refrigerant. If the lubricating oil cannot return to the lower oil sump in time, on the one hand, the oil level will decrease, which in severe cases will affect oil pumping and cause crankshaft wear, and on the other hand, the oil discharge rate of the compressor will be too high, affecting the energy efficiency of the refrigeration system. Contents of Utility Model
[0003] In view of the problems existing in the prior art, the purpose of the present utility model is to provide a motor assembly and a compressor, which can improve the oil return capability of the compressor and reduce the oil discharge rate of the compressor.
[0004] An embodiment of the present utility model provides a motor assembly, comprising a motor, a balance member and an oil baffle plate, wherein the motor comprises a stator and a rotor arranged inside the stator, and the oil baffle plate and the balance member are arranged at one end of the rotor; the oil baffle plate comprises a mounting portion, an annular plate and an extension plate which are coaxially arranged, the mounting portion and the extension plate are respectively arranged on two sides of the annular plate and both extend in a direction away from the annular plate; a central through hole is formed in the annular plate, and the mounting portion is arranged around the central through hole; the extension plate is arranged around the circumferential direction of the annular plate.
[0005] In some embodiments, the stator comprises a winding, a stator core and an insulating bracket, the winding is wound on the stator teeth of the stator core, and the insulating bracket is arranged between the winding and the end of the stator core; the end of the rotor close to the insulating bracket is a first end, the diameter of the annular plate is d, the diameter of the inner edge of the insulating bracket is D, the distance from the side of the annular plate close to the rotor to the first end of the rotor is h1, and the distance from the end of the inner edge of the insulating bracket facing away from the motor to the first end of the rotor is h2, which satisfies: when d<D, h1>2mm; when d≥D, h1>h2.
[0006] In some embodiments, the height of the mounting portion is h3, which satisfies: h3≤h1.
[0007] In some embodiments, the height of the extension plate is h4, which satisfies: h4≥1mm.
[0008] In some embodiments, the included angle between the extension plate and the annular plate is β, which satisfies: 20°≤β≤160°.
[0009] In some embodiments, the annular plate is provided with a first mounting hole, and the rotor is provided with a second mounting hole, wherein the first mounting hole corresponds to the second mounting hole.
[0010] In some embodiments, a pad is further included, disposed between the annular plate and the rotor. The pad has a third mounting hole, which corresponds to the first mounting hole and the second mounting hole. The pad and the annular plate are integrally formed or separately disposed.
[0011] In some embodiments, the sidewall of the extension plate is provided with a plurality of second flow holes, and at least one of the second flow holes is in contact with the annular plate.
[0012] In some embodiments, the balancing component is integrally formed with the pad or the oil baffle.
[0013] This utility model embodiment also provides a compressor, including the motor assembly described above.
[0014] The motor assembly and compressor provided by this utility model have the following advantages:
[0015] When the aforementioned motor assembly is applied to a compressor, the annular plate of the oil baffle prevents the lubricating oil rising with the refrigerant from flowing directly out of the compressor through the rotor channel. The extension plate on the oil baffle increases the fluid rotation speed in the upper chamber of the motor as the oil baffle rotates with the rotor, thereby allowing the lubricating oil droplets rising to the upper chamber of the motor to separate from the refrigerant in time, reach the inner wall of the housing, and then fall back into the oil sump of the compressor. Ultimately, this reduces the oil discharge rate of the compressor, improves the oil return capacity of the compressor, and ensures the stability of the liquid level in the compressor oil sump. Attached Figure Description
[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.
[0017] Figure 1 This is a schematic diagram of a motor assembly according to an embodiment of the present invention;
[0018] Figure 2 This is a schematic diagram of an oil baffle plate according to an embodiment of the present invention;
[0019] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the oil baffle plate of this utility model;
[0020] Figure 4 This is a cross-sectional schematic diagram of the oil baffle plate according to another embodiment of the present utility model;
[0021] Figure 5 This is a schematic diagram of a motor assembly according to another embodiment of the present invention;
[0022] Figure 6 This is a schematic diagram of an oil baffle and a balancing component according to an embodiment of the present invention;
[0023] Figure 7 This is a schematic diagram of an oil baffle and a balancing component according to another embodiment of the present invention;
[0024] Figure 8 This is a schematic diagram of a compressor according to an embodiment of the present invention.
[0025] Figure label:
[0026] 10 Stator 33 Extension Plate
[0027] 20 Rotor 331 Second Flow Hole
[0028] 21 First flow hole 40 Insulating support
[0029] 22 Second mounting hole 50 pad
[0030] 30 Oil baffle plate 51 Third mounting hole
[0031] 31 Mounting section 60 Housing
[0032] 311 Mounting hole 61 Exhaust port
[0033] 32 Annular plate 70 Crankshaft
[0034] 321 Center through hole 80 Balancing component
[0035] 322 First mounting hole Detailed Implementation
[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.
[0037] To address the problems in the prior art, this utility model provides a motor assembly, including a motor, a balancing component, and an oil baffle. The motor includes a stator and a rotor disposed inside the stator. The oil baffle and the balancing component are disposed at one end of the rotor. The oil baffle includes a mounting portion, an annular plate, and an extension plate coaxially arranged. The mounting portion and the extension plate are respectively disposed on both sides of the annular plate and both extend in a direction away from the annular plate. The annular plate has a central through hole, and the mounting portion is arranged around the central through hole. The extension plate is arranged circumferentially around the annular plate.
[0038] The motor assembly in this technical solution is applied to the compressor. The annular plate of the oil baffle can prevent some of the lubricating oil that rises with the refrigerant from flowing directly out of the compressor through the rotor channel. The extension plate on the oil baffle can enhance the fluid rotation speed in the upper cavity of the motor when the oil baffle rotates with the rotor. This allows the lubricating oil droplets that rise to the upper cavity of the motor to separate from the refrigerant in time, reach the inner wall of the casing, and then fall back into the oil sump of the compressor. Ultimately, this reduces the oil discharge rate of the compressor, improves the oil return capacity of the compressor, and ensures the stability of the liquid level in the compressor oil sump.
[0039] The motor assembly provided by this utility model will be explained in detail below with reference to specific embodiments.
[0040] Figure 1 A schematic diagram of a motor assembly provided in an embodiment of the present invention is shown; Figure 2 A schematic diagram of an oil baffle provided in an embodiment of the present invention is shown; Figure 3 A cross-sectional schematic diagram of an oil baffle plate according to an embodiment of the present invention is shown. Figures 1 to 3 As shown, the motor assembly includes a motor, an oil baffle 30, and a balancing component 80. The motor includes a stator 10 and a rotor 20 disposed inside the stator 10. The oil baffle 30 and the balancing component 80 are disposed at one end of the rotor 20. The oil baffle 30 includes a mounting portion 31, an annular plate 32, and an extension plate 33 arranged coaxially. The mounting portion 31 and the extension plate 33 are respectively disposed on both sides of the annular plate 32 and extend in a direction away from the annular plate 32. The annular plate 32 has a central through hole 321, and the mounting portion 31 is arranged around the central through hole 321. The extension plate 33 is arranged circumferentially around the annular plate 32.
[0041] When the above motor assembly is applied to a compressor, during the operation of the compressor, the compressed refrigerant flows to the upper part of the motor assembly and is then discharged out of the compressor. During the operation of the refrigerant, part of the lubricating oil moves together with the refrigerant. After the lubricating oil rises along the passage of the rotor 20 along with the refrigerant, it encounters the oil baffle 30. The annular plate 32 of the oil baffle 30 blocks the lubricating oil from continuing to rise, making it move toward the inner wall surface of the shell and finally return to the oil pool. The arrangement of the extension plate 33 of the oil baffle 30 can enhance the fluid rotation speed of the upper chamber of the motor when the extension plate 33 rotates. Therefore, part of the lubricating oil droplets that rise to the upper part of the motor assembly along with the refrigerant will be thrown onto the inner wall of the compressor shell under the rotating action of the extension plate 33, and then separated from the refrigerant. This part of the lubricating oil then flows back to the internal oil pool of the compressor through the trimmed edge of the stator 10. Therefore, the motor assembly provided by the utility model can reduce the oil discharge rate of the compressor, improve the oil return capacity of the compressor, and ensure the stability of the liquid level of the compressor oil pool.
[0042] Further, as shown in Figure 1 , the rotor 20 is provided with a first flow hole 21, through which the refrigerant and lubricating oil can flow upward. The annular plate 32 can block the first flow hole 21. When the lubricating oil flows upward through the first flow hole 21 along with the refrigerant, the lubricating oil can be prevented from directly flowing out of the compressor, so as to reduce the oil discharge rate of the compressor.
[0043] Further, please continue to refer to Figure 1 , the stator 10 includes a winding, a stator core and an insulating bracket 40. The winding is wound on the stator teeth of the stator core, and the insulating bracket 40 is arranged between the winding and the end of the stator core. The end of the rotor 20 close to the insulating bracket 40 is a first end, the distance from the side of the annular plate 32 close to the rotor 20 to the first end of the rotor 20 is h1, the distance from the end of the inner edge of the insulating bracket 40 facing away from the motor to the first end of the rotor 20 is h2, the diameter of the annular plate 32 is d, and the diameter of the inner edge of the insulating bracket 40 is D. When d<D, the following condition is satisfied: h1>2mm. When the lubricating oil flows upward through the first flow hole 21 of the rotor 20 along with the refrigerant, due to the blocking effect of the annular plate 32, the refrigerant will flow out through the gap between the oil baffle 30 and the inner edge of the insulating bracket 40 and enter the upper cavity of the motor. If the height of h1 is too small, the resistance of the lubricating oil when flowing upward through the first flow hole 21 will be too large, which will affect the flow of the refrigerant, and further lead to the failure of the lubricating oil to return to the oil pool and the increase of the oil discharge rate. Therefore, h1 is set to be greater than 2mm.
[0044] Further, as shown in Figure 5 , in other embodiments, the diameter d of the annular plate 32 and the diameter D of the inner edge of the insulating bracket 40 satisfy d≥D. When d≥D, the condition h1>h2 is satisfied. Setting h1>h2 can avoid interference between the oil baffle 30 and the insulating bracket 40.
[0045] Furthermore, such as Figure 3 As shown, the height of the mounting part 31 is h3, satisfying that h3≤h1. The mounting part 31 is provided with a mounting mating hole 311, into which the crankshaft of the compressor can be assembled. Setting h3≤h1 avoids interference between the mounting part 31 and the rotor 20 when the oil baffle 30 is installed.
[0046] Furthermore, such as Figure 3 As shown, the height of the extension plate 33 is h4, satisfying: h4≥1mm. When the motor is running, the rotor 20 drives the oil baffle 30 to rotate. When the extension plate 33 of the oil baffle 30 rotates, it can enhance the rotational speed of the fluid in the upper cavity of the motor assembly. When the annular plate 32 does not adequately shield the lubricating oil, due to the higher density of the lubricating oil, the lubricating oil rising above the motor will reach the inner wall of the compressor housing under the action of centrifugal force, thereby causing the lubricating oil to return to the oil sump along the inner wall of the compressor housing, ultimately reducing the oil discharge rate of the compressor and increasing the oil level in the oil sump. By setting the height h4 of the extension plate 33, it is ensured that the fluid in the upper space of the motor assembly has a suitable rotational speed, thus better separating the lubricating oil from the refrigerant.
[0047] Furthermore, such as Figure 3 As shown, the included angle between the extension plate 33 and the annular plate 32 is β, which satisfies: 20°≤β<160°. By setting the included angle between the extension plate 33 and the annular plate 32, it is ensured that the fluid in the upper space of the motor assembly has sufficient rotational speed, thereby enabling better separation of lubricating oil and refrigerant.
[0048] Furthermore, such as Figures 1 to 3 As shown, the annular plate 32 has a first mounting hole 322, and the rotor 20 has a second mounting hole 22, with the first mounting hole 322 corresponding to the second mounting hole 22. By installing fixing parts in the first mounting hole 322 and the second mounting hole 22, the oil baffle 30 can be fixedly connected to the rotor 20, so that when the motor is running, the rotor 20 can drive the oil baffle 30 to rotate.
[0049] Furthermore, such as Figure 1 As shown, the motor assembly also includes a spacer 50 disposed between the annular plate 32 and the rotor 20. The spacer 50 has a third mounting hole 51, which corresponds to the first mounting hole 322 and the second mounting hole 22. The spacer 50 supports the oil baffle 30, preventing deformation during installation and avoiding interference between the oil baffle 30 and the rotor 20. Figure 1 As shown, the pad 50 and the annular plate 32 are separate components; Figure 4As shown, the pad 50 and the annular plate 32 are integrally formed. This integral forming of the pad 50 and the annular plate 32 simplifies the assembly process and improves the assembly efficiency of the motor assembly.
[0050] Furthermore, such as Figure 2 As shown, the side wall of the extension plate 33 is provided with a plurality of second flow holes 331, at least one of which contacts the annular plate 32. The second flow holes 331 allow lubricating oil accumulated on the oil baffle plate 30 to be flung out through the second flow holes 331 when the oil baffle plate 30 rotates, and then return to the oil sump along the shell wall of the housing 60, preventing lubricating oil from accumulating on the oil baffle plate 30 and failing to flow back to the oil sump. The specific shape and number of the second flow holes 331 can be set according to actual needs, and are not specifically limited here.
[0051] Furthermore, such as Figure 6 As shown, in some embodiments, the balancing component 80 can be integrally formed with the pad 50 and the oil baffle 30. For example... Figure 7 As shown, in some other embodiments, the balance component 80 can be integrally formed with the oil baffle 30. The integral forming of the balance component 80 and the oil baffle 30 can simplify the assembly steps and improve the assembly efficiency of the motor assembly.
[0052] To further confirm the beneficial effects of the motor assembly provided by this utility model, the motor assembly provided by this utility model and a motor assembly provided by the prior art were installed in a compressor of the same model. The lubricating oil flow rates in each flow channel of the motor were then compared between the two compressors during one working cycle (intake + compression + exhaust). The results show that, compared to the motor assembly in the prior art, the motor assembly provided by this utility model significantly improves the oil return capability. Therefore, the motor assembly provided by this utility model can make the oil level in the compressor oil sump more stable and reduce the oil discharge rate.
[0053] This utility model embodiment also provides a compressor, including the motor assembly described above. Figure 8 A schematic diagram of a compressor according to an embodiment of the present invention is shown. Figure 8 As shown, the compressor includes a motor assembly, a pump body assembly, and a housing 60, with the motor assembly and pump body assembly located inside the housing 60. The housing 60 has an exhaust port 61, and the pump body assembly has a crankshaft 70 connected to the rotor 20 and the oil baffle 30. When the motor assembly operates, the crankshaft 70 drives the compression components of the pump body assembly to compress the refrigerant. The compressed refrigerant is then discharged from the housing 60 through the exhaust port 61 and enters the refrigeration system for a refrigeration cycle. Since this compressor includes the aforementioned motor assembly, it achieves all the technical effects of the aforementioned motor assembly, which will not be elaborated further here.
[0054] In summary, the motor assembly and compressor provided by this utility model have the following advantages:
[0055] The annular plate of the oil baffle can prevent the lubricating oil rising with the refrigerant from flowing directly out of the compressor from the rotor channel, and instead move towards the inner wall of the housing and then fall back into the oil sump. The extension plate on the oil baffle can increase the fluid rotation speed in the upper cavity of the motor when the oil baffle rotates with the rotor, so that the lubricating oil droplets rising to the upper cavity of the motor can be separated from the refrigerant in time, reach the inner wall of the housing, and then fall back into the oil sump of the compressor. Ultimately, this reduces the oil discharge rate of the compressor, improves the oil return capacity of the compressor, and ensures the stability of the liquid level in the compressor oil sump.
[0056] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A motor assembly, characterized in that, comprising an electric motor, a balance member and an oil baffle, wherein the electric motor comprises a stator and a rotor arranged inside the stator, and the oil baffle and the balance member are arranged at one end of the rotor; the oil baffle comprises a mounting portion, an annular plate and an extension plate which are coaxially arranged, the mounting portion and the extension plate are respectively arranged on two sides of the annular plate and both extend in a direction away from the annular plate; a central through hole is formed in the annular plate, and the mounting portion is arranged around the central through hole; the extension plate is arranged around the circumferential direction of the annular plate.
2. The motor assembly according to claim 1, characterized in that, The stator comprises a winding, a stator core and an insulating bracket, the winding is wound on stator teeth of the stator core, and the insulating bracket is arranged between the winding and the end of the stator core; the end of the rotor close to the insulating bracket is a first end, the diameter of the annular plate is d, the diameter of the inner edge of the insulating bracket is D, the distance from the side of the annular plate close to the rotor to the first end of the rotor is h1, the distance from the end of the inner edge of the insulating bracket away from the electric motor to the first end of the rotor is h2, and the following conditions are satisfied: when d<D, h1>2mm; when d≥D, h1>h2.
3. The motor assembly according to claim 2, characterized in that, The height of the mounting portion is h3, which satisfies: h3≤h1.
4. The motor assembly according to claim 1, characterized in that, The height of the extension plate is h4, which satisfies: h4≥1mm.
5. The motor assembly according to claim 1, characterized in that, The included angle between the extension plate and the annular plate is β, which satisfies: 20°≤β≤160°.
6. The motor assembly according to claim 1, characterized in that, A first mounting hole is formed in the annular plate, a second mounting hole is formed in the rotor, and the first mounting hole corresponds to the second mounting hole.
7. The motor assembly according to claim 6, characterized in that, The oil baffle structure further comprises a cushion block arranged between the annular plate and the rotor; a third mounting hole is formed in the cushion block, and the third mounting hole corresponds to the first mounting hole and the second mounting hole; the cushion block and the annular plate are integrally formed or are arranged as separate components.
8. The motor assembly according to claim 1, characterized in that, A plurality of second flow holes are formed in the side wall of the extension plate, and at least one of the second flow holes is in contact with the annular plate.
9. The motor assembly according to claim 7, characterized in that, The balance member and the cushion block or the oil baffle are integrally formed.
10. A compressor, characterized in that, An electric motor assembly comprising the electric motor assembly as defined in any one of claims 1 to 9.