Oil retaining structure, motor and compressor

Abstract

The utility model discloses an oil baffle structure, a motor and a compressor. The oil blocking structure comprises a baffle, a boss part is integrally formed on the first side of the baffle, and a balance part is integrally formed on the second side, opposite to the first side, of the baffle. According to the oil baffle structure, the motor and the compressor, the problems that in the prior art, a high-rotating-speed and large-displacement compressor is high in oil discharge rate, and a rotor baffle, an oil baffle plate and a balancing weight on the compressor are tedious to assemble can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, and in particular to an oil retaining structure, a motor and a compressor. Background Art

[0002] As the core component of refrigeration equipment, a compressor typically consists of a sealed casing, a pump assembly, a motor assembly, a gas-liquid separator, and suction and discharge pipes. The motor assembly consists of a stator and a rotor assembly. When the compressor is operating, the rotor assembly rotates within the stator, and the crankshaft in the pump assembly drives the piston to eccentrically move within the cylinder. This forces low-pressure refrigerant gas into the cylinder through the suction pipe for compression, and then discharges high-pressure refrigerant gas through the discharge pipe to the heat exchange system.

[0003] Lubricating oil is stored at the bottom of the compressor's enclosed casing. During operation, this oil inevitably enters the refrigeration pipelines and participates in the refrigeration cycle. Excessive oil accumulation in the refrigeration system can affect heat exchange and lead to oil starvation, impacting compressor reliability. In existing technology, high-speed, high-displacement compressors, especially those with high oil discharge rates, often employ oil baffles on the rotor baffle or counterweight to reduce this rate. However, assembly of the rotor baffle, counterweight, and oil baffle is cumbersome. Utility Model Content

[0004] The main purpose of the present invention is to provide an oil baffle structure, a motor and a compressor, which at least solve the problems of high oil discharge rate of high-speed and large-displacement compressors in the prior art and the complicated assembly of the rotor baffle, oil baffle and balance weight on the compressor.

[0005] According to one aspect of the present invention, an oil retaining structure is provided, comprising:

[0006] The baffle has a boss portion integrally formed on a first side thereof and a balancing portion integrally formed on a second side thereof opposite to the first side thereof.

[0007] Furthermore, the baffle is a circular plate-shaped structure, the boss portion includes a plurality of convex strips, the plurality of convex strips extend inward along the outer circumference of the baffle by a predetermined length, and the plurality of convex strips are all inclined in a clockwise or counterclockwise direction.

[0008] Furthermore, the baffle is a circular plate-shaped structure, and the balancing portion includes an arc-shaped balancing block, and the outer peripheral side of the arc-shaped balancing block is flush with the outer peripheral side of the circular plate-shaped structure.

[0009] Furthermore, the second side of the baffle further includes a windproof structure, and the windproof structure is connected to the balancing block and is surrounded to form an arc-shaped cavity.

[0010] Furthermore, an oil unloading hole is provided on the wind-shielding structure, and the oil unloading hole is communicated with the arc-shaped cavity.

[0011] Furthermore, the two ends of the arc-shaped balance block are respectively the windward side and the leeward side, and the oil unloading hole is provided at one end of the windproof structure close to the windward side.

[0012] Furthermore, the minimum thickness T of the baffle satisfies the relationship: T≥0.8mm.

[0013] On the other hand, the present invention further provides a motor, which includes the above-mentioned oil retaining structure and a rotor assembly, wherein the oil retaining structure is fixedly connected to the end face of the rotor assembly in the axial direction.

[0014] Furthermore, the rotor assembly includes a rotor body and a crankshaft, the rotor body is provided with an axial hole and a plurality of magnetic steel slots, the crankshaft is passed through the axial hole and the oil retaining structure, each magnetic steel slot is embedded with a magnet, the convex strips on the oil retaining structure abut against the magnetic steel, and the number of the convex strips Q1 and the number of the magnetic steel slots Q2 satisfy the relationship: Q1≥Q2.

[0015] Furthermore, when the oil retaining structure is connected to the rotor assembly, a rotor circulation hole is also provided on the rotor body. When the oil retaining structure is connected to the rotor assembly, the outer end flow area S1 and the inner end flow area S2 formed between the convex strips of the oil retaining structure, the baffle and the end face of the rotor body, and the area S3 of the rotor circulation hole satisfy the relationship: S1>S2>S3.

[0016] Furthermore, the minimum distance L1 between the convex strip of the oil retaining structure and the center of the through hole on the oil retaining structure and the maximum distance L2 from the rotor circulation hole to the center of the through hole satisfy the relationship: L1>L2.

[0017] On the other hand, the present invention also provides a compressor, which includes the above-mentioned motor.

[0018] In the utility model, during actual assembly, the oil baffle structure can be installed by making one side of the boss portion abut against the motor, and gradually fixing the connection with the rotor assembly of the motor by using the connecting piece passed through the baffle. The assembly process is simple, and a balancing part is provided on the oil baffle structure, so there is no need to assemble the balancing part additionally, thereby reducing the number of parts.

[0019] In other words, by integrally forming a boss on the first side of the baffle, this application simplifies the internal structure of the compressor and improves its operational reliability. Positioning the balancing portion on the second side of the baffle, opposite the first side, more effectively balances the centrifugal force generated by the crankshaft during high-speed operation, significantly reducing compressor vibration, extending the compressor's service life, and improving its operational smoothness, thereby enhancing overall mechanical efficiency. Furthermore, by integrally forming the balancing portion on the second side of the baffle, it better complements the baffle's functionality and optimizes gas flow.

[0020] When the compressor starts working, the oil baffle structure can prevent the lubricating oil in the compressor from being discharged directly from the exhaust pipe of the compressor. In addition, a low-pressure area will be formed under the baffle of the oil baffle structure, causing the oil-gas mixture to flow upward from the rotor flow hole, reducing the speed of the oil-gas mixture flowing upward at the stator cut edge. During the operation of the compressor, after the oil and gas separation effect of the oil baffle structure, the lubricating oil will adhere to the inner wall of the compressor casing and eventually fall back into the oil pool from the stator oil return channel of the motor, which can effectively reduce the oil discharge rate and ensure the reliable operation of the refrigeration system. At the same time, the baffle balance part and the boss part are integrally formed to enhance the overall strength of the oil baffle structure and improve the assembly efficiency of the oil baffle structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of the oil retaining structure disclosed in an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 The main view;

[0024] Figure 3 A schematic diagram of a balancing portion of an oil retaining structure disclosed in an embodiment of the present utility model;

[0025] Figure 4 for Figure 3 sectional view of

[0026] Figure 5 for Figure 3 A top view of

[0027] Figure 6 This is a schematic diagram of the assembly of the oil retaining structure and the rotor assembly disclosed in an embodiment of the present utility model;

[0028] Figure 7This is a cross-sectional view of the assembled oil retaining structure and rotor assembly disclosed in an embodiment of the present utility model.

[0029] The above drawings include the following reference numerals:

[0030] 10. Baffle; 101. Through hole; 102. Annular protrusion; 103. Riveted hole; 104. Protrusion; 11. Raised strip; 12. Balance block; 121. Windward side; 122. Leeward side; 13. Windproof structure; 131. Oil unloading hole; 20. Rotor body; 21. Shaft hole; 22. Magnetic steel slot; 221. Magnetic steel; 23. Rotor flow hole. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0034] As mentioned in the background technology, in the prior art, especially for high-speed, large-displacement compressors, the oil discharge rate is relatively high. Typically, an oil baffle is provided on the rotor baffle or counterweight to reduce the oil discharge rate. However, the assembly of the rotor baffle, counterweight, and oil baffle is cumbersome. Therefore, the present application proposes an oil baffle structure that integrally forms a baffle, a counterweight, and a boss, thereby reducing the oil discharge rate and alleviating the cumbersome assembly of the oil baffle structure. The oil baffle structure of the present application will be described in detail below in conjunction with the accompanying drawings.

[0035] See also Figures 1 to 7 As shown, according to an embodiment of the present invention, an oil baffle structure is provided. The oil baffle structure includes a baffle 10 .

[0036] In this embodiment, a boss portion is integrally formed on a first side of the baffle 10 , and a balancing portion is integrally formed on a second side of the baffle 10 opposite to the first side.

[0037] During actual assembly, the oil retaining structure can be installed by making one side of the boss portion abut against the motor, and gradually fixing the connection with the rotor assembly of the motor by using the connector provided on the baffle 10. The assembly process is simple, and a balancing part is provided on the oil retaining structure, so there is no need to assemble the balancing part additionally, thereby reducing the number of parts.

[0038] In other words, the present invention provides an integrally formed boss on the first side of the baffle 10, simplifying the internal structure of the compressor and improving its operational reliability. Providing a balancing portion on the second side of the baffle 10, opposite the first side, more effectively balances the centrifugal force generated by the crankshaft during high-speed operation, significantly reducing compressor vibration, extending the compressor's service life, and improving its operational smoothness, thereby enhancing overall mechanical efficiency.

[0039] When the compressor starts working, the baffle 10 of the oil baffle structure can prevent the oil-gas mixture of lubricating oil and refrigerant gas in the compressor from being directly discharged from the exhaust pipe of the compressor. In addition, a low-pressure area will be formed under the baffle 10 of the oil baffle structure, causing the oil-gas mixture to flow upward from the rotor flow hole, reducing the speed of the oil-gas mixture flowing upward at the stator cut edge. During the operation of the compressor, after the oil and gas separation effect of the oil baffle structure, the lubricating oil will adhere to the inner wall of the compressor casing, and eventually fall back to the oil pool from the stator oil return channel of the motor, which can effectively reduce the oil discharge rate and ensure the reliable operation of the refrigeration system. At the same time, the balancing part and the boss part of the baffle 10 are integrally formed to enhance the overall strength of the oil baffle structure and improve the assembly efficiency of the oil baffle structure.

[0040] like Figures 1 to 2As shown, the baffle 10 has a circular plate-like structure. This configuration evenly distributes the load, improving the mechanical strength and durability of the baffle 10 and extending its service life in the compressor. Furthermore, the configuration of the baffle 10 in a circular plate-like structure can reduce airflow turbulence and resistance, thereby reducing wind resistance.

[0041] Furthermore, the boss portion includes a plurality of ridges 11. For example, the number of the ridges 11 may be 2, 4, 5, 6, 8, 9, 10, etc. Figure 1 and Figure 2 The figure shows the case where there are 8 ridges 11. In actual production, the number of ridges 11 can be set according to actual needs, and this application does not impose any specific restrictions. In this application, multiple ridges 11 extend inward along the outer circumference of the baffle 10 by a predetermined length. The length can be reasonably set according to the distance between the rotor flow hole 23 on the rotor body 20 and the crankshaft, and this application also does not impose any specific restrictions. See again Figure 1 and Figure 2 As shown, multiple ridges 11 are arranged on the baffle 10 in a clockwise or counterclockwise direction. In other words, multiple ridges 11 are inclined along the same circumferential direction of the circular plate structure, and each ridge 11 is inclined at the same angle to the circular plate structure, forming a spiral arrangement. Specifically, the direction in which the ridges 11 extend inward from the outer circumference of the baffle 10 is the same as the direction of rotation of the rotor assembly. This provides a flow-guiding effect, facilitating the separation of lubricating oil and gas.

[0042] like Figures 1 to 7 As shown, a through hole 101 is provided in the center of the baffle 10. This through hole 101 facilitates smooth passage of a long crankshaft (not shown) through the oil baffle structure when the oil baffle structure is assembled with the rotor assembly. In addition, an annular protrusion 102 may or may not be provided on the first side of the baffle 10. Figure 1 The diagram shows an annular protrusion 102 provided on the first side of the baffle 10, which is arranged around the outer circumference of the through hole 101. This arrangement ensures the concentricity of the oil retaining structure and the crankshaft, helps reduce vibration and imbalance caused by eccentricity during rotation, and improves the operating stability of the compressor.

[0043] In some embodiments, when the crankshaft is shorter, the through hole 101 is not provided in the center of the baffle 10 , and the crankshaft does not pass through the baffle 10 .

[0044] like Figures 3 to 7As shown, the baffle 10 is a circular plate-like structure, and the balancing portion includes an arc-shaped balancing block 12, and the outer peripheral side of the arc-shaped balancing block 12 is flush with the outer peripheral side of the circular plate-like structure. The balancing block 12 is arranged on one side of the baffle 10 to offset the centrifugal force generated by the crankshaft in the compressor during the rotation process, thereby achieving a dynamic balance effect, making the compressor run more smoothly, reducing noise, improving work efficiency, and extending the service life of the compressor. The outer peripheral side of the arc-shaped balancing block 12 is arranged flush with the outer peripheral side of the baffle 10 with a circular plate-like structure, which can reduce the wind resistance of the oil retaining structure.

[0045] Furthermore, the second side of the baffle 10 also includes a windshield structure 13, which is an arc-shaped protrusion, and the outer peripheral side of the arc-shaped protrusion is flush with the outer peripheral side of the circular plate-shaped baffle, and the windshield structure 13 is connected to the balance block 12 and is surrounded to form an arc-shaped cavity. The main functions of such a setting are: (1) the windshield structure 13 and the balance block 12 are surrounded to form an arc-shaped cavity, which can reduce the resistance of air to the balance block 12 during high-speed rotation and improve the operating efficiency of the compressor; (2) connecting the windshield structure 13 and the balance block 12 can smooth the airflow, reduce turbulence and impact, reduce noise, and reduce vibration caused by the airflow, further improving the operating stability of the compressor; (3) setting the windshield structure 13 and the balance block 12 into a circular whole can reduce wind resistance.

[0046] like Figure 3 、 Figure 4 and Figure 6 As shown, the windshield structure 13 is provided with an oil discharge hole 131, which is connected to the arc-shaped cavity. During the operation of the compressor, lubricating oil inevitably enters the arc-shaped cavity. The oil discharge hole 131 is provided in the windshield structure 13, and is connected from the inner wall surface to the outer wall surface of the windshield structure 13. This facilitates the timely discharge of lubricating oil in the windshield structure 13, preventing it from accumulating therein and reducing the impact on the operating performance of the compressor.

[0047] like Figure 6 As shown, in this embodiment, the rotor assembly rotates counterclockwise, corresponding to the windward side 121, and the other side of the windward side 121 is the leeward side 122. Furthermore, an oil discharge hole 131 is provided at one end of the windshield structure 13 near the windward side 121. This arrangement facilitates the smooth flow of lubricating oil within the windshield structure 13 from the oil discharge hole 131 during rotation, thereby reducing the impact of lubricating oil accumulation on the operating performance of the compressor.

[0048] like Figure 4As shown, the minimum thickness T of the baffle 10 satisfies the relationship: T≥0.8mm. For example, the thickness T of the baffle 10 can be 0.8mm, 1mm, 2mm, 3mm, etc. Specifically, designing the minimum thickness of the baffle 10 to be no less than 0.8mm is not only conducive to the installation and maintenance of the baffle 10, but also allows the baffle 10 to have higher structural strength, and can better withstand the centrifugal force and vibration generated by the compressor when running at high speed, reduce the displacement caused by vibration or impact, and is conducive to maintaining the precise alignment of the various components in the compressor, improving the operating efficiency of the equipment, and also helping to prevent the baffle 10 from deformation or damage, ensuring that it maintains good performance after long-term use. In addition, the thickness of the baffle 10 also needs to take cost into consideration to determine the optimal thickness.

[0049] Combine Figures 1 to 7 As shown, on the other hand, the present application further provides a motor, which includes the above-mentioned oil retaining structure and a rotor assembly, wherein the oil retaining structure is fixedly connected to the end face of the rotor assembly in the axial direction. Optionally, the oil retaining structure can be fixedly connected to the rotor assembly by riveting, welding, bolting, screwing, etc. In the present application, it is preferred that the oil retaining structure and the rotor assembly be fixedly connected by riveting, because riveting can provide higher structural strength, durability and reliability, and is particularly suitable for use in high-speed rotation and high-vibration environments.

[0050] Furthermore, the present application provides a plurality of rivet holes 103 in the oil retaining structure. For example, the number of rivet holes 103 can be 4, 6, 8, etc. Figures 1 to 7 The figure shows the case where there are four rivet holes 103. The specific number of rivet holes 103 is not specifically limited in this application and is selected according to actual needs during the actual production and processing. The rivet holes 103 are connected to the protrusions 104. The shape of the rivet holes 103 can be cylindrical, rectangular, square, etc. The actual shape is selected according to actual production needs. Figures 1 to 7 The figure shows the case where the shape of the rivet hole 103 is cylindrical. The circular rivet hole 103 is easy to process, and the rivet is directly connected to the inner wall surface thereof for greater stability.

[0051] like Figure 6 and Figure 7As shown, the rotor assembly includes a rotor body 20 and a crankshaft. The rotor body 20 is provided with an axial hole 21 and a plurality of magnetic steel slots 22. For example, the number of magnetic steel slots 22 can be 4, 5, 6, 7, 8, 9, etc. When the oil retaining assembly is assembled with the rotor assembly, the crankshaft is passed through the axial hole 21 and the oil retaining structure. Each magnetic steel slot 22 is embedded with a magnetic steel 221. The ridges 11 on the oil retaining structure abut against the magnetic steel 221 to prevent the magnetic steel 221 in the magnetic steel slot 22 from jumping when the compressor is running. The number Q1 of the ridges 11 and the number Q2 of the magnetic steel slots 22 satisfy the relationship: Q1 ≥ Q2. For example, when the number of magnetic steel slots 22 is 8, the number of the ridges 11 can be 8, 9, 10, etc. In order to reduce production costs, in this embodiment, the number of the ridges 11 and the number of the magnetic steel slots 22 are set in a one-to-one correspondence.

[0052] Furthermore, when the oil retaining structure is connected to the rotor assembly, the fluid flows out from the space between the baffle 10 in the oil retaining structure and the upper end surface of the rotor assembly. In this application, the maximum distance from the ridge 11 to the center of the through hole 101 is the radius (i.e. Figure 7 L3 in the figure), the height of the ridge 11 is the cylindrical surface area formed by the height minus the area cut off by the ridge 11 as the outer end flow area S1; the minimum distance from the ridge 11 to the center of the through hole 101 (i.e. Figure 7 Where L1 is the radius, and the height of ridge 11 is the inner flow area S2. The area of ​​the cylindrical surface formed by the height minus the area intercepted by ridge 11 is the inner flow area S2. The area of ​​rotor flow hole 23 is S3. The relationship between S1, S2, and S3 satisfies the equation: S1>S2>S3. A larger flow area reduces the resistance to lubricating oil flowing out between baffle 10 and the upper end surface of the rotor assembly, resulting in smoother flow and improved compressor operation.

[0053] See again Figure 7 As shown, a rotor circulation hole 23 is also provided on the rotor body 20. The provision of the rotor circulation hole 23 can balance the pressure on both sides of the rotor assembly, promote the flow of gas, and also take away some heat, playing a certain cooling role. The distance L1 between the ridge 11 of the oil retaining structure and the center of the through hole 101 on the oil retaining structure and the maximum distance L2 from the rotor circulation hole 23 to the center of the through hole 101 satisfy the relationship: L1>L2. With this arrangement, the ridge 11 will not block the rotor circulation hole 23, which is conducive to the outflow of refrigerant and lubricating oil from the rotor circulation hole 23. In addition, the outer diameter of the annular protrusion 102 provided on the baffle 10 is smaller than the minimum distance between the rotor circulation hole 23 and the crankshaft. This arrangement is also to ensure that the annular protrusion 102 does not block the rotor circulation hole 23 after the oil retaining structure is assembled with the rotor assembly, so that the refrigerant and lubricating oil in the compressor can flow out smoothly.

[0054] In summary, the present application has a boss portion integrally formed on the first side of the baffle 10, and a balancing portion integrally formed on the second side opposite to the first side. The oil retaining structure is integrally formed, and when it is assembled with the rotor assembly, the complexity of assembly is reduced. The ridges 11 on the baffle 10 are distributed above the magnet 221 and abut against it, which can effectively fix the magnet 221 and prevent it from jumping. Moreover, the ridges 11 on the baffle 10 extend from the outer periphery to the inside on the baffle 10 in the same direction as the rotation direction of the rotor assembly. Such an arrangement is conducive to flow diversion and oil-gas separation. Specifically, a low-pressure area will be formed below the baffle 10, which effectively increases the flow rate of the refrigerant and lubricating oil flowing out of the rotor flow hole 23 and reduces the flow speed of the cut edge upward. The refrigerant and lubricating oil flowing out of the rotor flow hole 23 will flow out from the space between the baffle 10 and the upper end face of the rotor assembly. After the oil and gas are separated in the oil retaining structure, the lubricating oil will adhere to the inner wall of the compressor housing and eventually fall back into the oil pool from the stator oil return channel of the motor, which can effectively reduce the oil discharge rate. In addition, a balancing block 12 and a windproof structure 13 are provided on the second side of the baffle 10, and the outer peripheral sides of the balancing block 12 and the windproof structure 13 are a full circle, which can effectively reduce wind resistance. An oil unloading hole 131 is provided in the windproof structure 13, and the oil unloading hole 131 is provided on the windward side 121 close to the balancing block 12. During the operation of the equipment, the lubricating oil that is inevitably present in the windproof structure 13 can be discharged in time to reduce the impact on the equipment.

[0055] Recombination Figures 1 to 7 As shown, on the other hand, the present application also provides a compressor comprising the aforementioned motor with an oil-blocking structure. The use of the aforementioned motor in this compressor can effectively reduce the oil discharge rate. For example, simulation software calculations show that the use of the motor with the aforementioned oil-blocking structure in this compressor can reduce the oil discharge rate by approximately 54%. Furthermore, the use of the aforementioned motor in this compressor reduces the number of assembly steps during assembly, improving assembly efficiency. The reduced oil discharge rate ensures the compressor's performance and reliability.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An oil retaining structure, characterized in that: include: A baffle (10) is provided with a boss portion integrally formed on a first side of the baffle (10), and a balancing portion integrally formed on a second side of the baffle (10) opposite to the first side.

2. The oil retaining structure according to claim 1, characterized in that: The baffle (10) is a circular plate-shaped structure, and the boss portion includes a plurality of convex strips (11). The plurality of convex strips (11) extend inwardly along the outer circumference of the baffle (10) by a predetermined length, and the plurality of convex strips (11) are all arranged to be inclined in a clockwise or counterclockwise direction.

3. The oil retaining structure according to claim 1, characterized in that: The baffle (10) is a circular plate-shaped structure, and the balancing portion includes an arc-shaped balancing block (12), wherein the outer peripheral side of the arc-shaped balancing block (12) is flush with the outer peripheral side of the circular plate-shaped structure.

4. The oil retaining structure according to claim 3, characterized in that: The second side of the baffle (10) further comprises a windproof structure (13), and the windproof structure (13) is connected to the balancing block (12) and is enclosed to form an arc-shaped cavity.

5. The oil retaining structure according to claim 4, characterized in that: An oil unloading hole (131) is provided on the windproof structure (13), and the oil unloading hole (131) is communicated with the arc-shaped cavity.

6. The oil retaining structure according to claim 5, characterized in that: The two ends of the arc-shaped balance block (12) are respectively a windward side (121) and a leeward side (122), and the oil unloading hole (131) is arranged at one end of the windproof structure (13) close to the windward side (121).

7. The oil retaining structure according to any one of claims 1 to 6, characterized in that: The minimum thickness T of the baffle (10) satisfies the relationship: T≥2mm.

8. A motor, characterized in that: The motor comprises the oil retaining structure according to any one of claims 1 to 7 and a rotor assembly, wherein the oil retaining structure is fixedly connected to an end face of the rotor assembly in an axial direction.

9. The motor according to claim 8, characterized in that The rotor assembly comprises a rotor body (20) and a crankshaft, wherein the rotor body (20) is provided with an axial hole (21) and a plurality of magnetic steel slots (22), the crankshaft is passed through the axial hole (21) and the oil retaining structure, and each magnetic steel slot (22) is embedded with a magnetic steel (221), the convex strips (11) on the oil retaining structure abut against the magnetic steel (221), and the number Q1 of the convex strips (11) and the number Q2 of the magnetic steel slots (22) satisfy the relationship: Q1≥Q2.

10. The motor according to claim 9, characterized in that The rotor body (20) is also provided with a rotor circulation hole (23). When the oil retaining structure is connected to the rotor assembly, the outer end flow area S1 and the inner end flow area S2 formed between the convex strips (11) of the oil retaining structure, the baffle (10) and the end surface of the rotor body (20) and the area S3 of the rotor circulation hole (23) satisfy the relationship: S1>S2>S3.

11. The motor according to claim 10, characterized in that The minimum distance L1 between the convex strip (11) of the oil retaining structure and the center of the through hole (101) on the oil retaining structure and the maximum distance L2 from the rotor circulation hole (23) to the center of the through hole (101) satisfy the relationship: L1>L2.

12. A compressor, characterized in that: The compressor comprises the motor according to any one of claims 8 to 11.

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