Rotor end cover and compressor

Abstract

The invention relates to the technical field of compressors, and provides a rotor end cover and a compressor, a rotor comprises a rotor iron core used for driving a crankshaft, the rotor iron core is provided with a first through hole along a first direction, a fixing part is used for being fixed with the axial end face of the rotor iron core, and the fixing part is provided with a first avoiding hole; the first through hole is located in the outer contour of the first receding hole. In the first direction, the first shielding part is located on the side, back to the rotor iron core, of the fixing part, and the projection in the first direction, the first shielding part and the first through hole at least partially coincide. The second shielding part is connected with the fixed part and the first shielding part and forms a discharge port with the fixed part and the first shielding part, and an included angle is formed between the opening direction of the discharge port and the first direction; the first direction is parallel to the axial direction of the crankshaft. The refrigerant impacts the second shielding part to achieve reversing, and after the refrigerant makes contact with the stator and / or the shell, the refrigerating machine oil is separated from the refrigerant, so that the escape condition of the refrigerating machine oil is restrained, and stable operation of the compressor is maintained.

Description

Technical Field

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

[0002] Generally, a compressor includes a housing, a compression mechanism, a motor, and a rotor end cover. The motor and the compression mechanism are both installed in the housing. The motor includes a rotor and a stator. The stator is fixed to the inner wall of the housing, and the rotor is rotatably inserted in the stator. The rotor includes a rotor core and a magnet. The magnet is installed in the rotor core. The compression mechanism includes a cylinder, a crankshaft, and a piston. The eccentric part of the crankshaft is fixed with a piston. The piston is located in the cylinder. When the compressor is started, the rotor drives the crankshaft to rotate, and the piston performs work on the refrigerant in the cylinder. In the axial direction of the crankshaft, the housing is provided with an exhaust hole on the side of the motor facing away from the compression mechanism. The compressed refrigerant can be discharged from the exhaust hole to the outside of the housing.

[0003] However, in the process of discharging the refrigerant, part of the refrigeration oil used for lubrication or sealing in the compressor is wrapped in the refrigerant and discharged out of the shell together, thus escaping, causing the refrigeration oil in the shell to gradually decrease, affecting the stability of the compressor operation.

[0004] Therefore, there is an urgent need for a rotor end cover and a compressor to solve the above technical problems. Summary of the Invention

[0005] The object of the present invention is to provide a rotor end cover and a compressor, which can suppress the escape of refrigeration oil with the refrigerant, thereby maintaining the normal operation of the compressor.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The rotor end cover includes a rotor core for driving a crankshaft, and the rotor core is provided with a first through hole along a first direction. The rotor end cover is characterized in that:

[0008] A fixing portion, the fixing portion being used to be fixed to the axial end surface of the rotor core, the fixing portion being provided with a first avoidance hole, and the first through hole being located within the outer contour of the first avoidance hole;

[0009] a first shielding portion, located on a side of the fixing portion facing away from the rotor core in the first direction, and wherein the first shielding portion at least partially overlaps with the first through hole in a projection in the first direction;

[0010] a second shielding portion, the second shielding portion connecting the fixing portion and the first shielding portion and forming a discharge port together with the fixing portion and the first shielding portion, wherein the opening direction of the discharge port is arranged at an angle to the first direction;

[0011] The first direction is parallel to the axial direction of the crankshaft.

[0012] As a preferred technical solution of the above-mentioned rotor end cover, the above-mentioned fixing portion is arranged in parallel with the above-mentioned first shielding portion.

[0013] As a preferred technical solution of the above-mentioned rotor end cover, the above-mentioned fixing portion and the above-mentioned first shielding portion are arranged at an angle.

[0014] As a preferred technical solution of the rotor end cover, in the projection in the first direction, the outer contour of the first shielding portion is located within the outer contour of the first avoidance hole, or coincides with the outer contour of the first avoidance hole.

[0015] As a preferred technical solution of the rotor end cover, a distance between the fixing portion and the first shielding portion in the first direction is h, which satisfies h≥1 mm.

[0016] As a preferred technical solution for the above-mentioned rotor end cover, the above-mentioned rotor core is provided with a second through hole along the above-mentioned first direction, the above-mentioned first shielding portion is provided with a second avoidance hole along the above-mentioned first direction, and the above-mentioned crankshaft is sequentially penetrated by the above-mentioned second through hole and the above-mentioned second avoidance hole along its axial direction, the aperture of the above-mentioned second avoidance hole is D, and the shaft diameter of the above-mentioned crankshaft is d, satisfying (Dd)≥0.3mm.

[0017] As a preferred technical solution of the above-mentioned rotor end cover, it also includes a balancing block, and the above-mentioned balancing block is installed on the above-mentioned fixing part.

[0018] As a preferred technical solution for the above-mentioned rotor end cover, the above-mentioned balancing block is located on the side of the above-mentioned second blocking portion facing away from the above-mentioned discharge port, and in the second direction, the head and tail edges of the above-mentioned balancing block do not overlap with the head and tail edges of the above-mentioned discharge port; the above-mentioned second direction is the circumferential direction of the above-mentioned crankshaft.

[0019] As a preferred technical solution of the rotor end cover, in a second direction, the balancing block at least partially overlaps with the discharge port, and the second direction is the circumferential direction of the crankshaft.

[0020] A compressor is also provided, comprising the crankshaft, the rotor core and the rotor end cover, wherein the crankshaft is sequentially passed through the rotor core and the rotor end cover, and the crankshaft is fixedly connected to the rotor core.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a compressor, comprising a crankshaft, a rotor core and a rotor end cover, wherein the crankshaft passes through the rotor core and the rotor end cover in sequence, the crankshaft is fixedly connected to the rotor core, and the rotor end cover is fixed to the axial end face of the rotor core.

[0023] Furthermore, the present invention provides a rotor end cover, wherein the rotor includes a rotor core for driving a crankshaft, the rotor core is provided with a first through hole along a first direction, and the rotor end cover includes a fixing portion, a first shielding portion, and a second shielding portion. The fixing portion is used to fix to the axial end face of the rotor core, the fixing portion is provided with a first avoidance hole, and the first through hole is located within the outer contour of the first avoidance hole; in the first direction, the first shielding portion is located on the side of the fixing portion facing away from the rotor core, and in the projection in the first direction, the first shielding portion and the first through hole at least partially overlap; the second shielding portion connects the fixing portion and the first shielding portion, and forms a discharge port with the fixing portion and the first shielding portion, the opening direction of the discharge port being arranged at an angle to the first direction; and the first direction is parallel to the axial direction of the crankshaft.

[0024] With this arrangement, when the compressor starts, the rotor drives the crankshaft to rotate, and the rotation of the crankshaft can perform work on the refrigerant. The compressed refrigerant can pass through the first through-hole and the first avoidance hole from bottom to top, and at least part of the refrigerant will impact the second shielding portion, achieving reversal. This allows the refrigerant to contact the stator and / or the housing before being discharged from the housing through the exhaust port. The refrigeration oil entrained in the refrigerant can adhere to the surface of the stator and / or the housing, thereby separating from the refrigerant and allowing the refrigeration oil to flow back along the surface of the stator and / or the housing. This prevents the refrigeration oil from escaping and maintains normal operation of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0026] Figure 1 Schematic diagram of the structure of the rotor end cover (excluding the balancing weight) provided in an embodiment of the present invention;

[0027] Figure 2 is a rear view of a rotor end cover provided by an embodiment of the present invention;

[0028] Figure 3 1 is a schematic structural diagram of a rotor end cover provided by an embodiment of the present invention;

[0029] Figure 4 is a top view of a rotor core provided by an embodiment of the present invention;

[0030] Figure 5 1 is a schematic diagram of the assembly of the rotor end cover and the rotor core provided by an embodiment of the present invention;

[0031] Figure 6 yes Figure 5 A top view of

[0032] Figure 7 It is a top view of the assembly structure of the rotor end cover and the rotor core provided in other embodiments of the present invention.

[0033] In the picture:

[0034] X, first direction; Y, second direction;

[0035] 100. Rotor end cover;

[0036] 110. Fixing portion; 111. First avoidance hole; 112. Second mounting hole;

[0037] 120. First shielding portion; 121. Second avoidance hole;

[0038] 130, second shielding portion;

[0039] 140. Discharge port;

[0040] 150, balance weight;

[0041] 200, rotor core; 210, first through hole; 220, second through hole; 230, first mounting hole;

[0042] 300, fasteners;

[0043] 400. Crankshaft. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0045] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0048] The present invention provides a compressor, including a crankshaft 400, a rotor core 200 and a rotor end cover 100, wherein the crankshaft 400 is sequentially passed through the rotor core 200 and the rotor end cover 100, the crankshaft 400 is fixedly connected to the rotor core 200, and the rotor end cover 100 is fixed to the axial end face of the rotor core 200.

[0049] Specifically, the compressor includes a shell, a compression mechanism, a motor and a rotor end cover 100. The motor and the compression mechanism are both installed in the shell. The motor includes a rotor and a stator. The stator is fixed to the inner wall of the shell, and the rotor is rotatably inserted in the stator. The rotor includes a rotor core 200 and a magnet. The magnet is installed in the rotor core 200. The compression mechanism includes a cylinder, a crankshaft 400 and a piston. The eccentric part of the crankshaft 400 is fixed with a piston. The piston is located in the cylinder. When the compressor is started, the rotor drives the crankshaft 400 to rotate, and the piston performs work on the refrigerant in the cylinder. In the axial direction of the crankshaft 400, the shell is provided with an exhaust hole on the side of the motor facing away from the compression mechanism. The compressed refrigerant can be discharged from the exhaust hole to the outside of the shell.

[0050] However, in the process of discharging the refrigerant, part of the refrigeration oil used for lubrication or sealing in the compressor is wrapped in the refrigerant and discharged out of the shell together, thus escaping, causing the refrigeration oil in the shell to gradually decrease, affecting the stability of the compressor operation.

[0051] like Figures 1 to 7As shown, the present invention provides a rotor end cover 100, the rotor includes a rotor core 200 for driving a crankshaft 400, the rotor core 200 is provided with a first through hole 210 along a first direction X, and the rotor end cover 100 includes a fixing portion 110, a first shielding portion 120 and a second shielding portion 130. Among them, the fixing portion 110 is used to be fixed to the axial end face of the rotor core 200, and the fixing portion 110 is provided with a first avoidance hole 111, and the first through hole 210 is located within the outer contour of the first avoidance hole 111; in the first direction X, the first shielding portion 120 is located on the side of the fixing portion 110 facing away from the rotor core 200, and in the projection of the first direction X, the first shielding portion 120 and the first through hole 210 at least partially overlap; the second shielding portion 130 connects the fixing portion 110 and the first shielding portion 120, and forms a discharge port 140 with the fixing portion 110 and the first shielding portion 120, and the opening direction of the discharge port 140 is set at an angle to the first direction X; the first direction X is parallel to the axial direction of the crankshaft 400.

[0052] For example, the rotor core 200 defines a plurality of first mounting holes 230 along the first direction X, and the fixing portion 110 defines a plurality of second mounting holes 112 along the first direction X. The plurality of second mounting holes 112 correspond one-to-one with the plurality of first mounting holes 230. Each second mounting hole 112 is configured with a fastener 300. The fastener 300 sequentially penetrates the second mounting hole 112 and the first mounting hole 230 to connect the rotor end cover 100 and the rotor core 200. The fastener 300 may be a rivet.

[0053] For example, in the projection in the first direction X, the first straight line passes through the rotation center O of the crankshaft 400 and intersects with the outer contour of the first through hole 210 to form intersection points M and N; in the projection in the first direction X, the first straight line intersects with the outer contour of the first shielding portion 120 to form intersection point P. The straight line distance between the rotation center O and the intersection point M is L OM , the straight-line distance between the rotation center O and the intersection point N is L ON , meet, L ON >L OM ; The straight-line distance between the rotation center O and the intersection point P is L OP , satisfying L OM <L OP .

[0054] With this arrangement, when the compressor starts, the rotor drives the crankshaft 400 to rotate. The rotation of the crankshaft 400 can perform work on the refrigerant. The compressed refrigerant can pass through the first through-hole 210 and the first avoidance hole 111 from bottom to top, and at least part of the refrigerant will impact the second shielding portion 130, achieving reversal. This allows the refrigerant to contact the stator and / or the housing before being discharged from the housing through the exhaust port. The refrigeration oil entrained in the refrigerant can adhere to the surface of the stator and / or the housing, thereby separating from the refrigerant and allowing the refrigeration oil to flow back along the surface of the stator and / or the housing. This prevents the refrigeration oil from escaping and maintains normal operation of the compressor.

[0055] Hereinafter, the mixture of refrigeration oil and refrigerant is simply referred to as fluid.

[0056] Furthermore, the opening direction of the discharge port 140 is perpendicular to the first direction X.

[0057] Furthermore, the rotor end cover 100 only includes a second shielding portion 130 , and the second shielding portion 130 itself has no holes. After the second shielding portion 130 connects the first shielding portion 120 and the fixing portion 110 , a continuous discharge port 140 is formed.

[0058] Furthermore, the rotor end cover 100 includes only one second shielding portion 130, and the second shielding portion 130 itself is provided with a plurality of holes, and the opening direction of the holes intersects with the first direction X. In this way, after the second shielding portion 130 is connected to the first shielding portion 120 and the fixing portion 110, although only one continuous discharge port 140 is formed, the fluid can be discharged not only through the discharge port 140, but also through the plurality of holes opened in the second shielding portion 130.

[0059] Furthermore, the rotor end cover 100 includes a plurality of second shielding portions 130 and the second shielding portions 130 themselves do not have holes. The second shielding portions 130 are spaced apart around the axis of the first avoidance hole 111. In this way, after the plurality of second shielding portions 130 are respectively connected to the first shielding portion 120 and the fixing portion 110, a plurality of discharge ports 140 are formed.

[0060] Furthermore, the fixing portion 110 , the first shielding portion 120 and the second shielding portion 130 are integrally formed.

[0061] Furthermore, the connection between the second shielding portion 130 and the first shielding portion 120 is in an arc-shaped transition.

[0062] Furthermore, the connection between the second shielding portion 130 and the fixing portion 110 is in an arc-shaped transition.

[0063] Furthermore, the rotor end cover 100 is made of non-magnetic material, such as non-magnetic stainless steel, aluminum alloy, etc.

[0064] Furthermore, in the projection in the first direction X, the second shielding portion 130 may be in an arc shape, a curved shape, or the like.

[0065] Optionally, the fixing portion 110 is arranged parallel to the first shielding portion 120. Exemplarily, the fixing portion 110 and the first shielding portion 120 are both plate-shaped structures, the axial end surface of the rotor core 200 is a plane, and the fixing portion 110 and the first shielding portion 120 are both parallel to the axial end surface of the rotor core 200.

[0066] Optionally, the fixing portion 110 is arranged at an angle to the first shielding portion 120. For example, the fixing portion 110 and the first shielding portion 120 are both plate-shaped structures, the axial end surface of the rotor core 200 is a plane, the fixing portion 110 is parallel to and fixed to the axial end surface of the rotor core 200, and the first shielding portion 120 is arranged at an angle to the fixing portion 110.

[0067] Furthermore, there is a solution that, along the opening direction of the discharge port 140, the first shielding portion 120 is away from the second shielding portion 130 by a distance h from the fixing portion 110 in the first direction X. 远 , satisfying h 远 Greater than h 近 , h 近 It is the distance between the first blocking portion 120 and the fixing portion 110 in the first direction X, on the side close to the second blocking portion 130 .

[0068] It can be understood that in the above solution, along the opening direction of the discharge port 140, the distance between the first blocking portion 120 and the second blocking portion 130 is a; in the first direction X, the distance between the first blocking portion 120 and the fixing portion 110 is h, satisfying that h is positively correlated with a.

[0069] In this way, the discharge port 140 is expanded along its opening direction, which can reduce the turbulence caused by the fluid discharged from the first through hole 210 impacting the first shielding portion 120 , so that the fluid can be discharged from the discharge port 140 more smoothly.

[0070] Furthermore, another solution is that, along the opening direction of the discharge port 140, the first shielding portion 120 away from the second shielding portion 130 is at a distance h from the fixing portion 110 in the first direction X. 远 , satisfying h 远 <h 近 , h 近 It is the distance between the first blocking portion 120 and the fixing portion 110 in the first direction X, on the side close to the second blocking portion 130 .

[0071] It can be understood that in the above solution, along the opening direction of the discharge port 140, the distance between the first blocking portion 120 and the second blocking portion 130 is a; in the first direction X, the distance between the first blocking portion 120 and the fixing portion 110 is h, satisfying that h is negatively correlated with a.

[0072] In this way, the discharge port 140 is narrowed along its opening direction, which can reduce the spraying area of ​​the fluid discharged from the discharge port 140 .

[0073] Optionally, in the projection in the first direction X, the outer contour of the first shielding portion 120 is located within the outer contour of the first avoidance hole 111 , or coincides with the outer contour of the first avoidance hole 111 .

[0074] One solution is that, in the projection in the first direction X, the outer contour of the first shielding portion 120 is located within the outer contour of the first avoiding hole 111 .

[0075] In this solution, it can be satisfied that L OM <L OP <L ON <L OQ That is, the first blocking portion 120 can block a portion of the first through hole 210, so that part of the fluid discharged from the first through hole 210 can still be discharged along the initial direction. Some of the distributed fluid discharged from the first through hole 210 impacts the first blocking portion 120 and then changes direction. In this way, the pressure P1 at the outlet of the first through hole 210 satisfies P1<P2, where P2 is the pressure at the outlet of the first through hole 210 when the projection of the first blocking portion 120 in the first direction X completely blocks the first through hole 210.

[0076] In this solution, it can also be satisfied that L ON <L OP <L OQ , Q is the intersection of the first straight line and the outer contour of the first escape opening. Thus, in the projection along the first direction X, the first shielding portion 120 completely blocks the first through hole 210, allowing nearly all of the fluid discharged from the first through hole 210 to impact the first shielding portion 120 before reversing direction. This further suppresses oil escape and allows for sufficient oil recovery.

[0077] Another solution is that, in the projection in the first direction X, the outer contour of the first shielding portion 120 coincides with the outer contour of the first avoidance hole 111. In this solution, L OP =L OQ That is, in the projection in the first direction X, the first blocking portion 120 completely blocks the first through hole 210, so that almost all of the fluid discharged from the first through hole 210 impacts the first blocking portion 120 and then reverses, which can further suppress the escape of the engine oil and fully recover the mechanism.

[0078] Optionally, the distance between the fixing portion 110 and the first shielding portion 120 in the first direction X is h, which satisfies h≥1 mm. This configuration can prevent the distance between the first shielding portion 120 and the fixing portion 110 in the first direction X from being too small, thereby preventing fluid from being discharged.

[0079] Optionally, the rotor core 200 is provided with a second through hole 220 along the first direction X, the first blocking portion 120 is provided with a second avoidance hole 121 along the first direction X, and the crankshaft 400 is provided with the second through hole 220 and the second avoidance hole 121 in sequence along its axial direction. The aperture of the second avoidance hole 121 is D, and the shaft diameter of the crankshaft 400 is d, satisfying (Dd) ≥ 0.3 mm.

[0080] Such an arrangement facilitates the assembly of the crankshaft 400 and the first shielding portion 120 .

[0081] Optionally, a balancing weight 150 is further included, and the balancing weight 150 is installed on the fixing portion 110 .

[0082] Furthermore, the balancing block 150 is detachably connected to the fixing portion 110. Thus, the balancing block 150 with the corresponding counterweight can be replaced according to the working conditions to balance the imbalance of the rotor and make it run smoothly.

[0083] Optional, such as Figure 3 and Figure 5 As shown, the balancing weight 150 is located on the side of the second blocking portion 130 facing away from the discharge port 140. In the second direction Y, the leading and trailing edges of the balancing weight 150 do not overlap with the leading and trailing edges of the discharge port 140. The second direction Y is the circumferential direction of the crankshaft 400. This ensures that the balancing weight 150 does not block the discharge port 140, and fluid discharged from the discharge port 140 generally does not come into contact with the balancing weight 150, allowing for relatively smooth discharge.

[0084] Optionally, the balancing weight 150 and the exhaust port 140 at least partially overlap in the second direction Y, where the second direction Y is the circumferential direction of the crankshaft 400 . In this way, the balancing weight 150 can change the injection area of ​​the fluid after it is discharged from the exhaust port 140 .

[0085] One solution is that the balancing weight 150 and the discharge port 140 only partially overlap in the second direction Y. Further, as Figure 7 As shown, the main body of the balancing weight 150 is mounted on the side of the second shielding portion 130 facing away from the discharge port 140. In the second direction Y, the leading and trailing ends of the balancing weight 150 overlap with the leading and trailing ends of the discharge port 140. In this way, the fluid ejected from the leading and trailing ends of the discharge port 140 is intercepted or redirected by the balancing weight 150, thereby restricting the spray area of ​​the fluid after it is discharged from the discharge port 140.

[0086] Another solution is that the balancing weight 150 and the discharge port 140 completely overlap in the second direction Y. That is, most of the fluid discharged from the discharge port 140 impacts the balancing weight 150 .

[0087] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A rotor end cover, wherein the rotor comprises a rotor core (200) for driving a crankshaft (400), wherein the rotor core (200) is provided with a first through hole (210) along a first direction (X), and wherein: The rotor end cover comprises: a fixing portion (110), the fixing portion (110) being used to be fixed to an axial end surface of the rotor core (200), the fixing portion (110) being provided with a first avoidance hole (111), and the first through hole (210) being located within an outer contour of the first avoidance hole (111); a first shielding portion (120), located on a side of the fixing portion (110) facing away from the rotor core (200) in the first direction (X), and wherein the first shielding portion (120) at least partially overlaps with the first through hole (210) in a projection in the first direction (X); a second shielding portion (130), the second shielding portion (130) connecting the fixing portion (110) and the first shielding portion (120), and forming a discharge port (140) with the fixing portion (110) and the first shielding portion (120), wherein the opening direction of the discharge port (140) is arranged at an angle to the first direction (X); The first direction (X) is parallel to the axial direction of the crankshaft (400).

2. The rotor end cover according to claim 1, characterized in that: The fixing portion (110) and the first shielding portion (120) are arranged in parallel.

3. The rotor end cover according to claim 1, characterized in that: The fixing portion (110) and the first shielding portion (120) are arranged at an angle.

4. The rotor end cover according to claim 1, characterized in that: In the projection in the first direction (X), the outer contour of the first shielding portion (120) is located within the outer contour of the first avoidance hole (111), or coincides with the outer contour of the first avoidance hole (111).

5. The rotor end cover according to claim 1, characterized in that: The distance between the fixing portion (110) and the first shielding portion (120) in the first direction (X) is h, and satisfies h≥1mm.

6. The rotor end cover according to claim 1, characterized in that: The rotor core (200) is provided with a second through hole (220) along the first direction (X), the first shielding portion (120) is provided with a second avoidance hole (121) along the first direction (X), the crankshaft (400) is sequentially provided with the second through hole (220) and the second avoidance hole (121) along its axial direction, the aperture of the second avoidance hole (121) is D, and the shaft diameter of the crankshaft (400) is d, satisfying (Dd) ≥ 0.3 mm.

7. The rotor end cover according to claim 1, characterized in that: It also includes a balancing weight (150), which is installed on the fixing portion (110).

8. The rotor end cover according to claim 7, characterized in that: The balancing block (150) is located on a side of the second shielding portion (130) facing away from the discharge port (140), and in a second direction (Y), the front and rear edges of the balancing block (150) do not overlap with the front and rear edges of the discharge port (140); the second direction (Y) is the circumferential direction of the crankshaft (400).

9. The rotor end cover according to claim 7, characterized in that: In a second direction (Y), the balancing block (150) and the exhaust port (140) at least partially overlap, and the second direction (Y) is the circumferential direction of the crankshaft (400).

10. A compressor, characterized in that The invention comprises the crankshaft (400), the rotor core (200) and the rotor end cover (100) according to any one of claims 1 to 9, wherein the crankshaft (400) is sequentially passed through the rotor core (200) and the rotor end cover (100), and the crankshaft (400) is fixedly connected to the rotor core (200).

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