An oil blocking structure, a rotor assembly, an electric machine and a compressor

Abstract

This invention provides an oil-blocking structure, a rotor assembly, a motor, and a compressor. The oil-blocking structure is used in conjunction with a rotor core, which has a flow hole where backflow occurs when operating at a first speed. The oil-blocking structure includes a movable stop, which connects to the rotor core and rotates together with it under the drive of the rotor core. When the rotor core operates at the first speed, the movable stop moves relative to the rotor core to a first position. In the first position, the movable stop blocks at least a portion of the flow hole where backflow occurs. According to the technical solution of this invention, since the movable stop can block the flow hole where backflow occurs when the rotor core operates at a first speed, such as a high speed, the flow area of ​​the backflow flow hole can be reduced, thereby reducing backflow and lowering the oil discharge rate of the compressor.

Description

Technical Field

[0001] This invention belongs to the field of oil-blocking technology, specifically relating to an oil-blocking structure, a rotor assembly, a motor, and a compressor. Background Technology

[0002] The compressor has a rotor assembly, and the rotor core of the rotor assembly is designed with multiple flow holes penetrating both ends of the axial direction. These flow holes are used for the flow of refrigerant gas and cooling oil liquid. The flow state of the oil and gas within the flow holes varies depending on the compressor's operating frequency. When the compressor operates at a high frequency, the rotor speed is high. At this time, some of the oil and gas in the flow holes flows towards the compressor's discharge port, while some flows back towards the pump body. This backflow increases the flow rate and velocity in the other channels of the motor, resulting in poorer oil-gas separation and a high oil discharge rate from the compressor. Summary of the Invention

[0003] Therefore, the present invention provides an oil baffle structure, a rotor assembly, a motor, and a compressor, which can solve the technical problem in the prior art where backflow occurs in some flow holes when the compressor operates at high frequency, resulting in a high oil discharge rate of the compressor.

[0004] To solve the above problems, the present invention provides an oil-blocking structure for use with a rotor core, wherein the rotor core has a flow hole that partially allows backflow when operating at a first speed.

[0005] The oil-blocking structure includes a movable stop, which is connected to the rotor core to rotate together with it under the drive of the rotor core, and moves to a first position relative to the rotor core when the rotor core is running at a first speed; wherein, in the first position, the movable stop blocks at least part of the flow hole where backflow occurs.

[0006] In some embodiments, the rotor core is provided with a blocking structure; when the rotor core rotates at the first speed, the movable stop is driven by its own wind resistance to move relative to the rotor core to the first position in conjunction with the blocking structure.

[0007] In some embodiments, the blocking structure includes an elastic element disposed between the movable stop and the rotor core, such that the movable stop is connected to the rotor core via the elastic element.

[0008] In some embodiments, the elastic element is used to undergo compressive deformation when the rotor core is rotating at the first speed, pushed by the movable stop, to provide an elastic force to the movable stop and block it.

[0009] In some embodiments, the oil-blocking structure further includes an oil-blocking cap for fixing to the rotor core; the elastic element is connected to the oil-blocking cap so that the elastic element is connected to the rotor core through the oil-blocking cap.

[0010] In some embodiments, the oil baffle cap has a base plate, and the oil baffle cap is fixedly connected to the rotor core through the base plate; the movable stop has a first side and a second side facing away from each other, the first side being opposite to the base plate; the movable stop has an elastic element receiving groove penetrating the first side and the second side, and the base plate is provided with a fixing member, the fixing member having a fixing part located in the elastic element receiving groove;

[0011] The movable stop is connected to one end of the elastic element through the groove wall of the elastic element receiving groove, and the oil stop cap is connected to the other end of the elastic element through the fixing part.

[0012] In some embodiments, the fixing member has an end cap located on the second side of the movable stop to stop and limit the second side of the movable stop.

[0013] In some embodiments, the movable stop is further configured to be in a second position when the rotor core is operating at a second rotational speed; wherein the second rotational speed is less than the first rotational speed; and in the second position, the movable stop clears the flow hole.

[0014] In some embodiments, the movable stop is provided with a first positioning part, and the rotor core is provided with a second positioning part. One of the first positioning part and the second positioning part is a positioning protrusion, and the other is a positioning groove. When the movable stop is in the second position, the positioning protrusion is inserted into the positioning groove. The movable stop is used to drive the first positioning part to disengage from the second positioning part when the rotor core is rotating at a first speed.

[0015] In some embodiments, when the rotor core is provided with a blocking structure, and the blocking structure includes an elastic element, and the elastic element is disposed between the movable stop and the rotor core so that the movable stop is connected to the rotor core through the elastic element, the elastic element is used to gradually recover deformation from the compressed state and push the movable stop to the second position when the speed of the rotor core gradually decreases from the first rotational speed to the second rotational speed, and pushes the movable stop to the second position when the speed of the rotor core decreases to the second rotational speed.

[0016] In some embodiments, when the oil baffle structure further includes an oil baffle cap, and the oil baffle cap is used to fix the rotor core, the second positioning part is disposed on the oil baffle cap to connect with the rotor core through the oil baffle cap.

[0017] In some embodiments, the oil-blocking structure further includes a guide structure for guiding the movement of the movable stop relative to the rotor core.

[0018] In some embodiments, when the oil-blocking structure further includes an oil-blocking cap, and the oil-blocking cap is used to fix the rotor core, the guiding structure includes a guide groove and a fixing post; one of the guide groove and the fixing post is disposed on the movable stop, and the other is disposed on the oil-blocking cap; the fixing post is slidably engaged with the guide groove; wherein, the fixing post is used to guide the movement of the movable stop relative to the rotor core by cooperating with the guide groove.

[0019] In some embodiments, when the movable stop is in the first position, the fixed post abuts against one end of the guide groove wall;

[0020] And / or, when the movable stop is further used to move relative to the rotor core to a second position when the rotor core is running at a second speed, and the movable stop is in the second position, the fixed post abuts against the other end wall of the guide groove.

[0021] The present invention also provides a rotor assembly comprising the oil baffle structure described in any one of the above descriptions.

[0022] The present invention also provides an electric motor that includes the oil baffle structure described in any one of the above descriptions, or includes the rotor assembly described above.

[0023] The present invention also provides a compressor comprising the oil baffle structure described in any one of the above descriptions, or the rotor assembly described in the above descriptions, or the motor described in the above descriptions.

[0024] The oil baffle structure, rotor assembly, motor, and compressor provided by this invention have the following beneficial effects:

[0025] 1. Because the movable stop can block the flow hole from flowing back when the rotor core is running at the first speed, such as high speed, the flow area of ​​the flow hole can be reduced, thereby reducing backflow and lowering the oil discharge rate of the compressor.

[0026] 2. By allowing the movable stop to open the flow hole when the rotor core rotates at low speed, the present invention can ensure that the flow hole is not blocked and the flow area is large, thereby reducing flow friction loss and power consumption. Attached Figure Description

[0027] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0028] Figure 1 This is an assembly structure diagram of the oil-blocking structure and the rotor core when the movable stop of the present invention is in the second position;

[0029] Figure 2 This is an assembly structure diagram of the oil-blocking structure and the rotor core when the movable stop of the present invention is in the first position;

[0030] Figure 3 This is a diagram showing the relative positions of the positioning protrusion and the positioning groove when the movable stop of the present invention is in the first position;

[0031] Figure 4 This is a diagram showing the relative positions of the positioning protrusion and the positioning groove when the movable stop of the present invention is in the second position;

[0032] Figure 5 This is a schematic diagram illustrating the connection between the movable stop and the fixed part through the elastic element;

[0033] Figure 6 It is a schematic diagram showing the assembly of the other end of the elastic element with the fixed element;

[0034] Figure 7 This is a schematic diagram of the oil baffle cap.

[0035] Figure 8 yes Figure 7 Perspective view of the center oil cap;

[0036] Figure 9 This is a structural diagram of the movable stop;

[0037] Figure 10 yes Figure 9 Another structural schematic diagram of the movable stop in the middle;

[0038] Figure 11 This is a structural diagram of the fastener;

[0039] Figure 12 This is a structural diagram of a fixed column.

[0040] The attached figures are labeled as follows:

[0041] 1. Movable stop; 2. Oil baffle cap; 3. Fixing component; 4. Elastic component; 5. Balance block; 6. Rotor core; 7. Fixing post; 11. Blocking part; 12. Limiting cap; 13. First positioning part; 1a. First surface; 1b. Second surface; 21. Base plate; 31. End cap; 32. Limiting post; 33. Protruding post; 34. Fixing part; 41. One end of the elastic component; 42. The other end of the elastic component; 61. Flow hole; 71. The other end cap; 101. Elastic component receiving groove; 102. Guide groove; 201. Second positioning part; 301. First riveting hole; w1. First rotational speed; w2. Second rotational speed. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0044] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0045] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0046] See also Figure 1-12 As shown, according to an embodiment of the present invention, an oil-blocking structure is provided for use in conjunction with a rotor core 6. The rotor core 6 has a flow hole 61 for partial backflow when operating at a first speed w1. The first speed w1 is a high speed.

[0047] like Figure 2 As shown, the aforementioned oil-blocking structure includes a movable baffle 1. The movable baffle 1 can be plate-shaped, acting as a movable baffle. The movable baffle 1 is connected to the rotor core 6 so that it rotates together with the rotor core 6. When the rotor core 6 operates at a first speed w1, the movable baffle 1 moves relative to the rotor core 6 to a first position. In the first position, the movable baffle 1 blocks at least part of the flow hole 61 where backflow occurs. Preferably, in the first position, the movable baffle 1 blocks all of the flow hole 61 where backflow occurs.

[0048] In the example above, since the movable stop 1 can block the backflow of the flow hole 61 when the rotor core 6 is running at the first speed w1, such as high speed, the flow area of ​​the backflow flow hole 61 can be reduced, thereby reducing backflow and lowering the oil discharge rate of the compressor.

[0049] To enable the aforementioned movable stop 1 to move to a first position relative to the rotor core 6 when the rotor core 6 is running at a first speed w1, in some embodiments, a blocking structure is provided on the aforementioned rotor core 6. When the rotor core 6 is running at the first speed w1, the movable stop 1 is pushed by its own wind resistance and, in conjunction with the blocking structure, moves relative to the rotor core 6 to the aforementioned first position.

[0050] In this invention, wind resistance is directly proportional to speed. When the rotor core 6 drives the movable stop 1 to rotate at high speed, the wind resistance experienced by the movable stop 1 increases. When the rotor core 6 drives the movable stop 1 at the first rotational speed w1, the movable stop 1 is propelled relative to the rotor core 6 by its own wind resistance. Without the obstruction of the blocking structure, the movable stop 1 would rotate. This invention, by setting a blocking structure to obstruct the movable stop 1, combined with the wind resistance of the movable stop 1, enables the movable stop 1 to move to the aforementioned first position.

[0051] In some implementations, such as Figure 1 and Figure 5As shown, the aforementioned blocking structure may include an elastic element 4, which may be a spring or flexible plastic, etc. The elastic element 4 is used to be disposed between the movable stop 1 and the rotor core 6, so that the movable stop 1 is connected to the rotor core 6 through the elastic element 4, thereby allowing the rotor core 6 to drive the movable stop 1 to move through the elastic element 4.

[0052] In the above example, when the rotor core 6 operates at the first speed w1, the blocking structure can block the movable stop 1 through the elastic element 4, so that the elastic element 4 can cooperate with the wind resistance of the movable stop 1, and the movable stop 1 can move to the aforementioned first position.

[0053] It should be noted that when the rotor core 6 operates at the first speed w1, the movable stop 1 is subjected to the thrust of wind resistance in the first direction, and the movable stop 1 is also subjected to the resistance of the blocking structure in the second direction, wherein the first direction and the second direction are opposite.

[0054] In a specific application example, the elastic element 4 is used to undergo compression deformation under the push of the movable stop 1 when the rotor core 6 is running at a first speed w1, so as to provide elastic force to the movable stop 1 and block it. The greater the wind resistance experienced by the movable stop 1, the greater the compression deformation of the elastic element 4 caused by the movable stop 1, and the greater the elastic force of the elastic element 4 in blocking the movable stop 1. When the forces on the movable stop 1 reach equilibrium, the movable stop 1 can be kept in the aforementioned first position.

[0055] In order to install the aforementioned elastic element 4, in some embodiments, such as Figure 1 and Figure 5 As shown, the aforementioned oil-blocking structure also includes an oil-blocking cap 2. The oil-blocking cap 2 is used to fix itself to the rotor core 6, for example, by using fasteners such as rivets. The aforementioned elastic member 4 is connected to the oil-blocking cap 2, so that the elastic member 4 is connected to the rotor core 6 through the oil-blocking cap 2. It should be noted that the connection between the elastic member 4 and the oil-blocking cap 2 includes both a non-separable connection and a separable abutment.

[0056] In some implementations, such as Figure 5 , Figure 7-10As shown, the aforementioned oil baffle cap 2 has a base plate 21, and the oil baffle cap 2 is fixedly connected to the rotor core 6 through the base plate 21. The movable stop 1 has a first surface 1a and a second surface 1b facing away from each other, with the first surface 1a opposite to the base plate 21. The movable stop 1 has an elastic element receiving groove 101 that penetrates through the first surface 1a and the second surface 1b. A fixing member 3 is provided on the base plate 21, and the fixing member 3 has a fixing part 34 located within the elastic element receiving groove 101. The fixing part 34 can be integrally formed on the fixing member 3. The movable stop 1 is connected to one end 41 of the elastic element through the groove wall of the elastic element receiving groove 101, and the oil baffle cap 2 is connected to the other end 42 of the elastic element through the fixing part 34. It should be noted that the connection between one end 41 of the elastic element and the groove wall of the elastic element receiving groove 101 includes both an inseparable connection and a separable abutment. The connection between the other end 42 of the elastic element and the fixing part 34 also includes both an inseparable connection and a separable abutment.

[0057] In the above example, the fixing part 34 of the fastener cooperates with the groove wall of the elastic member receiving groove 101 to realize the installation of the elastic member 4.

[0058] In some implementations, such as Figure 5 As shown, the aforementioned elastic element receiving groove 101 has a first end opposite to the fixing part 34, and the elastic element receiving groove 101 is connected to one end 41 of the elastic element through the groove wall of the first end. The movable stop 1 has a limiting cap 12 at the first end of the elastic element receiving groove 101, which limits one end 41 of the elastic element to prevent it from dislodging from the first end of the elastic element receiving groove 101.

[0059] In some implementations, such as Figure 5 As shown, the aforementioned fixing member 3 has an end cap 31, which can be integrally formed on the fixing member 3. The end cap 31 is located on the second surface 1b side of the movable stop member 1 to stop and limit the second surface 1b of the movable stop member 1.

[0060] In some implementations, such as Figure 5 As shown, the aforementioned fastener 3 can be a first rivet, which can be installed by hammering. Specifically, the first rivet initially has the same outer diameter top and bottom. When installing the first rivet, one end of the first rivet is passed through the elastic member receiving groove 101 and aligned with the first riveting hole 301 on the base plate 21. Then, the other end of the first rivet is hammered, causing one end of the first rivet to insert into the first riveting hole 301. The hammering deforms the other end of the first rivet, increasing its outer diameter and forming the aforementioned end cap 31. The end cap 31 can stop and limit the second surface 1b of the movable stop 1, preventing the movable stop 1 from detaching from the fastener 3. The distance between the end cap 31 and the second surface 1b of the movable stop 1 is h1.

[0061] In some implementations, such as Figure 9 As shown, the width of the aforementioned elastic element receiving groove 101 is d3, as... Figure 12 As shown, the outer diameter of the aforementioned fixing part 34 is d1, and the outer diameter of the end cap 31 is d2, where d1 is less than d3 and less than d2. Because d1 is less than d3, the fixing part 34 will not contact the sidewall in the width direction of the elastic element receiving groove 101, thus preventing obstruction of the movement of the movable stop 1. Simultaneously, because d3 is less than d2, the end cap 31 can stop and limit the second surface 1b of the movable stop 1, preventing the movable stop 1 from detaching from the fixing part 3. In some embodiments, the fitting clearance (i.e., d3-d1) between the aforementioned fixing part 34 and the sidewall of the elastic element receiving groove 101 is within a range of 5mm to prevent displacement in the direction of the rotor core 6 axis, thus avoiding additional noise problems.

[0062] In some implementations, such as Figure 5 As shown, the distance between the aforementioned end cap 31 and the base plate 21 is h1, and the thickness of the movable stop 1 is h2, where h1 is greater than h2.

[0063] In some implementations, such as Figure 1-2 As shown, the elastic element receiving groove 101 described above can be an arc-shaped groove. For example... Figure 6 and Figure 11 As shown, the aforementioned fixing part 34 has a limiting post 32 on its side. The other end 42 of the aforementioned elastic member can be sleeved on the limiting post 32, so that the limiting post 32 can limit the other end 42 of the elastic member. The limiting post 32 has protrusions 33 on its opposite side walls. When the elastic member 4 is a spring, the protrusions 33 can be inserted into the gap between two adjacent turns of the other end of the spring to fix the other end of the spring and prevent the spring from loosening.

[0064] In some implementations, such as Figure 1 As shown, the aforementioned movable stop 1 is also used to be in a second position when the rotor core 6 is running at a second speed w2. The second speed w2 is less than the first speed w1; and in the second position, the movable stop 1 clears the flow hole 61.

[0065] In this invention, the second rotational speed w2 can be low. When the rotor core 6 is rotating at low speed, if the movable stop 1 still partially blocks the flow hole 61, the flow area will decrease, which will increase the flow velocity in the flow hole 61, increase flow friction loss, and increase power consumption. In the example above, the present invention ensures that the flow hole 61 is not blocked by the movable stop 1 when the rotor core 6 is rotating at low speed, thus increasing the flow area and reducing flow friction loss and power consumption.

[0066] In some implementations, such as Figure 1-2As shown, the aforementioned movable stop 1 may have a blocking portion 11. When the movable stop 1 is in the first position, the movable stop 1 blocks the flow hole 61 from flowing back through the blocking portion 11. When the movable stop 1 is in the second position, the blocking portion 11 is located between two adjacent flow holes 61, so that the movable stop 1 can clear the flow hole 61.

[0067] To achieve the purpose of the aforementioned movable stop 1 being in the second position when the rotor core 6 is operating at the second speed w2, in some embodiments, such as Figure 3-4 As shown, the aforementioned movable stop 1 may be provided with a first positioning part 13, which may be integrally formed on the movable stop 1. The aforementioned rotor core 6 is provided with a second positioning part 201. One of the first positioning part 13 and the second positioning part 201 is a positioning protrusion, and the other is a positioning groove. When the movable stop 1 is in the second position, the positioning protrusion is inserted into the positioning groove, and the frictional resistance between the positioning protrusion and the positioning groove can offset the wind resistance of the movable stop 1, which is beneficial to keeping the movable stop 1 in the aforementioned second position. The movable stop 1 is used to drive the first positioning part 13 to rotate together. And when the rotor core 6 is running at a first speed w1, the movable stop 1 is used to drive the first positioning part 13 to disengage from the second positioning part 201, so as to release the locking state of the movable stop 1 by the concave and convex cooperation of the first positioning part 13 and the second positioning part 201, so that the movable stop 1 can move to the aforementioned first position.

[0068] In some embodiments, both the positioning convex bulge and the positioning groove described above can be hemispherical.

[0069] In some embodiments, when the rotor core 6 is provided with a blocking structure, and the blocking structure includes an elastic element 4, and the elastic element 4 is used to be disposed between the movable stop 1 and the rotor core 6 so that the movable stop 1 is connected to the rotor core 6 through the elastic element 4, the elastic element 4 is used to gradually recover deformation from the compressed state and push the movable stop 1 to the aforementioned second position when the speed of the rotor core 6 gradually decreases from the first rotational speed w1 to the second rotational speed w2, and push the movable stop 1 to the aforementioned second position when the speed of the rotor core 6 drops to the second rotational speed w2.

[0070] In the above example, when the rotor core 6 drives the movable stop 1 at a relatively high first rotational speed w1, the movable stop 1 experiences greater wind resistance. At this time, the movable stop 1 can overcome the frictional resistance between the positioning protrusion and the positioning groove, causing the positioning protrusion to disengage from the positioning groove, thereby unlocking the movable stop 1. Simultaneously, the movable stop 1 also pushes the elastic member 4 to undergo compression deformation, allowing the movable stop 1 to move relative to the rotor core 6 to the aforementioned first position, thereby blocking at least part of the backflow through the flow hole 61. When the speed of the rotor core 6 gradually decreases from the first rotational speed w1 to the second rotational speed w2, the wind resistance of the movable stop 1 decreases. At this time, the elastic member 4 gradually recovers its deformation, pushing the movable stop 1 to the aforementioned second position. When the speed of the rotor core 6 drops to the second rotational speed w2, the elastic member 4 pushes the movable stop 1 to the aforementioned second position. At this time, the positioning protrusion on the movable stop 1 re-inserts into the positioning groove, thereby locking the movable stop 1.

[0071] It should be noted that when the movable stop 1 is in the second position, the elastic element 4 can be in a natural state or in a state of being compressed and deformed by the movable stop 1. Specifically, when the movable stop 1 is in the second position, if the elastic element 4 is in a natural state, and the rotor core 6 is rotating at the second speed w2, the wind resistance pressure of the movable stop 1 is completely offset by the frictional resistance of the positioning protrusion and the positioning groove. When the movable stop 1 is in the second position, if the elastic element 4 is in a state of being compressed and deformed by the movable stop 1, and the rotor core 6 is rotating at the second speed w2, part of the wind resistance pressure of the movable stop 1 is offset by the frictional resistance of the positioning protrusion and the positioning groove, and the other part can be offset by the elastic force applied to the movable stop 1 by the elastic element 4.

[0072] In some implementations, such as Figure 3 and Figure 4 As shown, when the aforementioned oil-blocking structure further includes an oil-blocking cap 2, and the oil-blocking cap 2 is used to fix it on the rotor core 6, the aforementioned second positioning part 201 can be disposed on the oil-blocking cap 2 to connect with the rotor core 6 through the oil-blocking cap 2. In a specific application example, the aforementioned second positioning protrusion can be disposed on the base plate 21 of the oil-blocking cap 2, and the aforementioned first positioning part 13 can be disposed on the first surface 1a of the movable stop 1.

[0073] In some embodiments, the aforementioned oil-blocking structure further includes a guide structure for guiding the movement of the movable stop 1 relative to the rotor core 6, so as to improve the movement accuracy of the movable stop 1.

[0074] To achieve the function of the aforementioned guiding structure, in some implementations, such as Figure 1-2As shown, when the oil-blocking structure also includes an oil-blocking cap 2, and the oil-blocking cap 2 is used to fix it on the rotor core 6, the aforementioned guiding structure includes a guide groove 102 and a fixing post 7. One of the guide groove 102 and the fixing post 7 is disposed on the movable stop 1, and the other is disposed on the oil-blocking cap 2. The fixing post 7 is slidably engaged with the guide groove 102. The fixing post 7 is used to guide the movement of the movable stop 1 relative to the rotor core 6 in cooperation with the guide groove 102.

[0075] In the above example, the fixed column 7 and the guide groove 102 cooperate to realize the function of the aforementioned guide structure, guiding the movement of the movable stop 1 relative to the rotor core 6.

[0076] In some embodiments, the aforementioned fixing post 7 is disposed on the base plate 21 of the oil baffle cap 2. The fixing post 7 passes through the guide groove 102. The aforementioned guide groove 102 extends from the first surface 1a of the movable stop 1 to the second surface 1b. Figure 12 As shown, the fixed post 7 is provided with another end cap 71, which is located on the second surface 1b side of the movable stop 1 to stop and limit the second surface 1b of the movable stop 1.

[0077] In some embodiments, the aforementioned fixing post 7 can be a second rivet, which can be installed by hammering. Specifically, the second rivet initially has the same outer diameter top and bottom. When installing the second rivet, one end of the second rivet is passed through the guide groove 102 and aligned with the second riveting hole on the base plate 21. Then, the other end of the second rivet is hammered to insert one end of the second rivet into the second riveting hole. The hammering deforms the outer diameter of the other end of the second rivet, thereby forming the aforementioned other end cap 71. This other end cap 71 can stop and limit the second surface 1b of the movable stop 1 to prevent the movable stop 1 from detaching from the fixing post 7. The distance between the other end cap 71 and the second surface 1b of the movable stop 1 is h1.

[0078] In some implementations, such as Figure 9 and Figure 12 As shown, the width of the aforementioned guide groove 102 is d3', the outer diameter of the aforementioned fixed post 7 is d1', and the outer diameter of the other end cap 71 is d2', wherein d1' is less than d3' and less than d2'. Because d1' is less than d3', the fixed post 7 will not contact the sidewall of the guide groove 102 in the width direction, thus preventing obstruction of the movement of the movable stop 1. Simultaneously, because d3' is less than d2', the other end cap 71 can stop and limit the movement of the second surface 1b of the movable stop 1, preventing the movable stop 1 from detaching from the fixed post 7. In some embodiments, the fitting clearance (i.e., d3'-d1') between the aforementioned fixed post 7 and the sidewall of the guide groove 102 is within a range of 5mm to prevent displacement in the direction of the rotor core 6 axis, thus avoiding additional noise problems.

[0079] In some implementations, such as Figure 9 As shown, the guide groove 102 can be an arc-shaped groove. d1 = d1', d2 = d2', d3 = d3'.

[0080] In some implementations, such as Figure 2 As shown, when the movable stop 1 is in the first position, the fixed post 7 abuts against one end of the guide groove 102 to achieve a stop and limit on the movable stop 1 in the first position. Figure 1 As shown, when the movable stop 1 is also used to move relative to the rotor core 6 to the second position when the rotor core 6 is running at the second speed w2, and when the movable stop 1 is in the second position, the fixed column 7 abuts against the other end of the guide groove 102 to achieve the stop and limit of the movable stop 1 in the second position.

[0081] The present invention also provides a rotor assembly, which may include the oil baffle structure of any of the above.

[0082] The present invention also provides an electric motor, which includes the oil baffle structure of any one of the above, or includes the rotor assembly of the above.

[0083] The present invention also provides a compressor that includes the oil baffle structure of any of the above, or includes the rotor assembly of the above, or includes the motor of the above.

[0084] Since the rotor assembly, motor and compressor all adopt the above-mentioned oil-blocking structure, the movable baffle 1 can block the flow hole 61 that causes backflow when the rotor core 6 is running at the first speed w1, such as high speed, thereby reducing the flow area of ​​backflow and reducing the oil discharge rate of the compressor.

[0085] When the compressor using the above-mentioned oil-blocking structure operates at different frequencies, the speed of the rotor core 6 varies. The oil-blocking structure of this invention, through the movement of the movable baffle 1, can change the flow orifice area of ​​the rotor core 6 at different speeds. Specifically, when the rotor core 6 rotates at high speed, the movable baffle 1 can block at least a portion of the flow orifice 61 where backflow occurs, thereby reducing the backflow flow area and lowering the oil discharge rate. When the rotor core 6 rotates at low speed, the movable baffle 1 opens the flow orifice 61, ensuring maximum flow area, thus reducing flow friction loss and power consumption.

[0086] When the aforementioned rotor core 6 is running at high speed at the first speed w1, some of the flow holes 61 on the rotor core 6 will experience backflow. In order to determine the flow holes 61 that experience backflow, fluid simulation can be performed for the compressor model. Based on the flow state of the simulation results, it can be determined which flow holes 61 are backflow holes. Then, the movable stop 1 can be used to block the backflow holes.

[0087] At the high speed (w1) of the compressor, the air resistance of the movable baffle 1 overcomes the elastic force of the elastic element 4 and the resistance between the positioning protrusion and the positioning groove, allowing the movable baffle 1 to move to the aforementioned first position under the push of its own air resistance. This achieves the purpose of blocking the backflow through the flow hole 61, reducing the flow area and lowering the oil discharge rate. At the low speed (w2) of the compressor, the air resistance of the movable baffle 1 is less than the sum of the elastic force of the elastic element 4 and the resistance between the stator protrusion and the positioning groove, thus ensuring that the flow hole 61 is not blocked and the flow area is maximized.

[0088] like Figure 1-2 As shown, the aforementioned rotor core 6 may also be provided with a balance block 5, which can be fixedly connected to the rotor core 6 by screws.

[0089] The oil-blocking structure of the present invention has two states, such as... Figure 1 As shown, Figure 1 This is the state at low speed, at which time the rotor core 6 operates at the second speed w2; Figure 2 This is the high-speed state, where the rotor core 6 operates at a first speed w1. As shown in the diagram, the state of the movable stop 1 directly determines the flow area of ​​the specific flow hole 61, and the state of the movable stop 1 is determined by the position of the fixed member 3 within the elastic member receiving groove 101. For example... Figure 1 As shown, in the initial static state, the fixed member 3 is located to the right of the elastic member receiving groove 101. At this time, the movable stop 1 is locked by the elastic member 4 and the positioning protrusion and positioning groove through their interlocking. At the low speed state of the second speed w2, the rotor core 6 drives the movable stop 1 to rotate. The movable stop 1 should have a relative displacement with respect to the rotor core 6. However, due to insufficient wind resistance, the movable stop 1 cannot release the interlocking state of the positioning protrusion and positioning groove. At this time, the blocking part 11 of the movable stop 1 is located between two adjacent flow holes 61, without blocking the flow holes 61, thus maximizing the flow area.

[0090] like Figure 2 As shown, when the speed is at the high speed of the first speed w1, the wind resistance of the movable stop 1 overcomes the elastic force of the elastic element 4 plus the critical force for releasing the locked state by the concave-convex fit and some frictional force, and the movable stop 1 is displaced to make the blocking part 11 of the movable stop 1 at least block part of the flow hole 61 where the backflow occurs, reducing the flow area of ​​the specified backflow flow hole 61; when the speed of the rotor core 6 drops from the first speed w1 to the second speed w2, the movable stop 1 returns to the initial second position under the drive of the elastic element 4, realizing the reset.

[0091] The technical solution of the present invention enables the flow state of the flow hole 61 to change with the increase of the operating frequency. When operating at low frequency, the flow area is maximized, while when operating at high frequency, the flow area of ​​backflow is reduced by partially blocking the backflow hole, thereby reducing the oil discharge rate.

[0092] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. An oil-blocking structure for use with a rotor core (6), the rotor core (6) having a flow hole (61) for partial backflow when operating at a first speed (w1); characterized in that: The oil-blocking structure includes a movable stop (1) for connecting with the rotor core (6) to rotate together under the drive of the rotor core (6), and to move to a first position relative to the rotor core (6) when the rotor core (6) is running at a first speed (w1); wherein, in the first position, the movable stop (1) blocks at least part of the flow hole (61) where backflow occurs; The rotor core (6) is provided with a blocking structure, the blocking structure including an elastic element (4), the elastic element (4) being disposed between the movable stop (1) and the rotor core (6) so that the movable stop (1) is connected to the rotor core (6) through the elastic element (4); when the rotor core (6) operates at the first speed (w1), the movable stop (1) is pushed by its own wind resistance and moves relative to the rotor core (6) to the first position in conjunction with the blocking structure; wherein, the movable stop moves to the first position by rotation; The oil-blocking structure further includes an oil-blocking cap (2), which is used to fix the rotor core (6); the elastic member (4) is connected to the oil-blocking cap (2) so that the elastic member (4) is connected to the rotor core (6) through the oil-blocking cap (2); the oil-blocking cap (2) has a base plate (21), and the oil-blocking cap (2) is fixedly connected to the rotor core (6) through the base plate (21); the movable stop (1) has a first side (1a) and a second side (1b) facing away from each other, the first side (1a) and the base plate (2b) facing away from each other. The plates (21) are opposite each other; the movable stop (1) has an elastic element receiving groove (101) that penetrates the first surface (1a) and the second surface (1b), and the bottom plate (21) is provided with a fixing member (3), the fixing member (3) has a fixing part (34) located in the elastic element receiving groove (101); wherein, the movable stop (1) is connected to one end (41) of the elastic element through the groove wall of the elastic element receiving groove (101), and the oil cap (2) is connected to the other end (42) of the elastic element through the fixing part (34).

2. The oil-blocking structure according to claim 1, characterized in that: The elastic element (4) is used to be compressed and deformed by the movable stop (1) when the rotor core (6) is running at the first speed (w1) to provide elastic force to the movable stop (1) and block the movable stop (1).

3. The oil-blocking structure according to claim 1, characterized in that: The fixing member (3) has an end cap (31) located on the second side (1b) of the movable stop (1) to stop and limit the second side (1b) of the movable stop (1).

4. The oil-blocking structure according to any one of claims 1-3, characterized in that: The movable stop (1) is also used to be in a second position when the rotor core (6) is running at a second speed (w2); wherein the second speed (w2) is less than the first speed (w1); and in the second position, the movable stop (1) clears the flow hole (61).

5. The oil retaining structure according to claim 4, characterized by: The movable stop (1) is provided with a first positioning part (13), and the rotor core (6) is provided with a second positioning part (201). One of the first positioning part (13) and the second positioning part (201) is a positioning protrusion, and the other is a positioning groove. When the movable stop (1) is in the second position, the positioning protrusion is inserted into the positioning groove. The movable stop (1) is used to drive the first positioning part (13) to disengage from the second positioning part (201) when the rotor core (6) is running at a first speed (w1).

6. The oil blocking structure according to claim 4, characterized by: When the rotor core (6) is provided with a blocking structure, and the blocking structure includes an elastic element (4), and the elastic element (4) is used to be disposed between the movable stop (1) and the rotor core (6) so that the movable stop (1) is connected to the rotor core (6) through the elastic element (4), the elastic element (4) is used to gradually recover deformation from the compressed state and push the movable stop (1) to the second position when the speed of the rotor core (6) gradually decreases from the first rotational speed (w1) to the second rotational speed (w2), and push the movable stop (1) to the second position when the speed of the rotor core (6) drops to the second rotational speed (w2).

7. The oil blocking structure according to claim 5, characterized by: When the oil baffle structure further includes an oil baffle cap (2), and the oil baffle cap (2) is used to fix the rotor core (6), the second positioning part (201) is disposed on the oil baffle cap (2) to be connected to the rotor core (6) through the oil baffle cap (2).

8. The oil blocking structure according to any one of claims 1 to 3, 5 to 6, wherein: It also includes a guide structure for guiding the movement of the movable stop (1) relative to the rotor core (6).

9. The oil retaining structure according to claim 8, characterized by: When the oil-blocking structure further includes an oil-blocking cap (2), and the oil-blocking cap (2) is used to fix the rotor core (6), the guiding structure includes a guide groove (102) and a fixing post (7); one of the guide groove (102) and the fixing post (7) is disposed on the movable stop (1), and the other is disposed on the oil-blocking cap (2); the fixing post (7) is slidably engaged with the guide groove (102); wherein, the fixing post (7) is used to cooperate with the guide groove (102) to guide the movement of the movable stop (1) relative to the rotor core (6).

10. The oil-blocking structure according to claim 9, characterized in that: When the movable stop (1) is in the first position, the fixed post (7) abuts against one end of the guide groove (102); And / or, when the movable stop (1) is also used to move relative to the rotor core (6) to a second position when the rotor core (6) is running at a second speed (w2), and when the movable stop (1) is in the second position, the fixed column (7) abuts against the other end of the guide groove (102).

11. A rotor assembly characterized by: The oil-blocking structure includes any one of claims 1-10.

12. An electric machine characterized by: It includes the oil baffle structure according to any one of claims 1-10, or the rotor assembly according to claim 11.

13. A compressor characterized by: It includes the oil baffle structure according to any one of claims 1-10, or the rotor assembly according to claim 11, or the motor according to claim 12.

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