Oil baffle structure, rotor assembly, motor and compressor

Abstract

The invention provides an oil baffle structure, a rotor assembly, a motor and a compressor, the oil baffle structure is used for cooperating with a rotor core for use, and the rotor core is provided with a circulation hole which partially generates backflow when operating at a first rotating speed; the oil blocking structure comprises a movable blocking piece, and the movable blocking piece is used for being connected with the rotor iron core so as to be driven by the rotor iron core to rotate together and move to a first position relative to the rotor iron core when the rotor iron core operates at a first rotating speed. At the first position, the movable blocking piece blocks at least part of the circulation holes where backflow occurs. According to the technical scheme of the invention, as the movable blocking piece can block the circulation hole where backflow occurs when the rotor iron core operates at the first rotating speed such as high speed, the circulation area of the backflow circulation hole can be reduced, backflow is reduced, and the oil spitting rate of the compressor is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of oil baffles, and in particular relates to an oil baffle structure, a rotor assembly, a motor and a compressor. Background Art

[0002] The compressor has a rotor assembly. The rotor core of the rotor assembly is designed with multiple flow holes that penetrate the two axial end faces. The flow holes are used to circulate refrigerant gas and cooling oil liquid. When the compressor operates at different frequencies, the flow state of the oil and gas in the flow holes is uncertain. When the compressor operates at a high frequency, the rotor speed is relatively high. At this time, part of the oil and gas in the flow holes will flow to the exhaust port of the compressor, and part of the oil and gas will flow back to the pump body. The reflux state will cause the flow rate of the remaining channels of the motor to increase, and the flow rate will increase accordingly, and the oil and gas separation effect will deteriorate, resulting in a high oil discharge rate of the compressor. Summary of the invention

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

[0004] In order to solve the above problems, the present invention provides an oil retaining structure for use with a rotor core, wherein the rotor core has a flow hole in which a part of the flow is refluxed when the rotor core is running at a first speed;

[0005] The oil blocking structure includes a movable block, which is used to be connected to the rotor core so as to rotate together with the rotor core and move to a first position relative to the rotor core when the rotor core runs at a first speed; wherein, in the first position, the movable block blocks at least part of the flow hole where backflow occurs.

[0006] In some embodiments, a blocking structure is provided on the rotor core; when the rotor core runs at the first speed, the movable stopper is used to be pushed by its own wind resistance and cooperate with the blocking structure to move relative to the rotor core to the first position.

[0007] In some embodiments, the blocking structure includes an elastic member, and the elastic member is used to be arranged between the movable stopper and the rotor core, so that the movable stopper is connected to the rotor core through the elastic member.

[0008] In some embodiments, the elastic member is used to be pushed by the movable stopper to undergo compression deformation when the rotor core rotates at the first speed, so as to provide elastic force to the movable stopper to block the movable stopper.

[0009] In some embodiments, the oil deflector structure further includes an oil deflector cap, which is used to be fixed on the rotor core; the elastic member is connected to the oil deflector cap so that the elastic member is connected to the rotor core through the oil deflector cap.

[0010] In some embodiments, the oil deflector cap has a bottom plate, and the oil deflector cap is fixedly connected to the rotor core through the bottom plate; the movable stopper has a first surface and a second surface opposite to each other, and the first surface is opposite to the bottom plate; the movable stopper has an elastic member accommodating groove penetrating the first surface and the second surface, and a fixing member is provided on the bottom plate, and the fixing member has a fixing portion located in the elastic member accommodating groove;

[0011] Wherein, the movable stopper is connected to one end of the elastic member through the groove wall of the elastic member accommodating groove, and the oil blocking cap is connected to the other end of the elastic member through the fixing portion.

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

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

[0014] In some embodiments, the movable stopper is provided with a first positioning portion, and the rotor core is provided with a second positioning portion, one of the first positioning portion and the second positioning portion is a positioning convex hump, and the other is a positioning groove; wherein, when the movable stopper is located at the second position, the positioning convex hump is inserted into the positioning groove; and the movable stopper is used to drive the first positioning portion to disengage from the second positioning portion when the rotor core operates at a first speed.

[0015] In some embodiments, when a blocking structure is provided on the rotor core, and the blocking structure includes an elastic member, and the elastic member is used to be arranged between the movable stopper and the rotor core so that the movable stopper is connected to the rotor core through the elastic member, the elastic member is used to gradually recover the deformation from the compressed state to push the movable stopper to move to the second position when the speed of the rotor core gradually decreases from the first speed to the second speed, and push the movable stopper to move to the second position when the speed of the rotor core drops to the second speed.

[0016] In some embodiments, when the oil deflector structure further includes an oil deflector cap, and the oil deflector cap is used to be fixed on the rotor core, the second positioning portion is disposed on the oil deflector cap to be connected to the rotor core through the oil deflector cap.

[0017] In some embodiments, the oil retaining structure further includes a guide structure, and the guide structure is used to guide the movement of the movable retaining member relative to the rotor core.

[0018] In some embodiments, when the oil deflector structure also includes an oil deflector cap, and the oil deflector cap is used to be fixed on the rotor core, the guide structure includes a guide groove and a fixed column; one of the guide groove and the fixed column is arranged on the movable stopper, and the other is arranged on the oil deflector cap; the fixed column is slidably matched with the guide groove; wherein the fixed column is used to cooperate with the guide groove to guide the movement of the movable stopper relative to the rotor core.

[0019] In some embodiments, when the movable stopper is located at the first position, the fixed column abuts against a groove wall at one end of the guide groove;

[0020] And / or, when the movable stopper is also used to move to a second position relative to the rotor core when the rotor core runs at a second speed, and when the movable stopper is located at the second position, the fixed column abuts against the other end groove wall of the guide groove.

[0021] The present invention also provides a rotor assembly, which includes any one of the above-mentioned oil retaining structures.

[0022] The present invention also provides a motor, which includes any one of the above-mentioned oil retaining structures, or includes the above-mentioned rotor assembly.

[0023] The present invention also provides a compressor, which includes any one of the oil retaining structures described above, or includes the rotor assembly described above, or includes the motor described above.

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

[0025] 1. Since the movable stopper can block the flow hole where the rotor core has reflux when it runs at the first speed, such as high speed, the flow area of ​​the reflux flow hole can be reduced to reduce the reflux and reduce the oil discharge rate of the compressor.

[0026] 2. The present invention enables the movable stopper to open the flow hole when the rotor core rotates at a low speed, thereby ensuring that the flow hole is not blocked and the flow area is large, thereby reducing flow friction loss and power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0028] Figure 1 It is an assembly structure diagram of the oil retaining structure and the rotor core when the movable retaining member of the present invention is located at the second position;

[0029] Figure 2 It is an assembly structure diagram of the oil retaining structure and the rotor core when the movable retaining member of the present invention is located at the first position;

[0030] Figure 3 is a relative position diagram of the positioning protrusion and the positioning groove when the movable stopper of the present invention is located at the first position;

[0031] Figure 4 is a relative position diagram of the positioning protrusion and the positioning groove when the movable stopper of the present invention is located at the second position;

[0032] Figure 5 is a schematic diagram reflecting the connection between the movable stopper and the fixed member through the elastic member;

[0033] Figure 6 It is a schematic diagram reflecting the assembly of the other end of the elastic member and the fixing member;

[0034] Figure 7 It is a structural schematic diagram of the oil retaining cap;

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

[0036] Fig. 9 It is a structural schematic diagram of a movable stopper;

[0037] Fig.10 yes Fig. 9 A structural schematic diagram of the movable stopper from another perspective;

[0038] Fig.11 It is a schematic diagram of the structure of the fixing parts;

[0039] Fig.12 It is a structural diagram of a fixed column.

[0040] The accompanying drawings are marked as follows:

[0041] 1. Movable stopper; 2. Oil retaining cap; 3. Fixing member; 4. Elastic member; 5. Balancing block; 6. Rotor core; 7. Fixing column; 11. Blocking part; 12. Limiting cap; 13. First positioning part; 1a. First surface; 1b. Second surface; 21. Bottom plate; 31. End cap; 32. Limiting column; 33. Boss; 34. Fixing part; 41. One end of the elastic member; 42. The other end of the elastic member; 61. Flow hole; 71. The other end cap; 101. Receiving groove for the elastic member; 102. Guide groove; 201. Second positioning part; 301. First riveting hole; w1. First rotation speed; w2. Second rotation speed. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] See also Figure 1-12 As shown, according to an embodiment of the present invention, an oil retaining structure is provided, which is used in conjunction with a rotor core 6, and 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 retaining structure includes a movable retainer 1. The movable retainer 1 may be plate-shaped, so that the movable retainer 1 is a movable retainer. The movable retainer 1 is used to be connected to the rotor core 6 so as to rotate together with the rotor core 6, and the movable retainer 1 moves to a first position relative to the rotor core 6 when the rotor core 6 runs at a first speed w1. In the first position, the movable retainer 1 blocks at least part of the flow hole 61 where backflow occurs. Preferably, in the first position, the movable retainer 1 blocks all the flow holes 61 where backflow occurs.

[0048] In the above example, since the movable stopper 1 can block the flow hole 61 where reflux occurs when the rotor core 6 runs at the first speed w1, such as high speed, the flow area of ​​the reflux flow hole 61 can be reduced to reduce reflux and reduce the oil discharge rate of the compressor.

[0049] In order to realize the function of the movable stopper 1 moving to the first position relative to the rotor core 6 when the rotor core 6 runs at the first speed w1, in some embodiments, a blocking structure is provided on the rotor core 6. When the rotor core 6 runs at the first speed w1, the movable stopper 1 is used to be pushed by its own wind resistance to cooperate with the blocking structure to move relative to the rotor core 6 to the first position.

[0050] The wind resistance is proportional to the speed. When the rotor core 6 drives the movable stopper 1 to rotate at a high speed, the wind resistance of the movable stopper 1 is greater. When the rotor core 6 drives the movable stopper 1 to move at the first speed w1, the movable stopper 1 is pushed by its own wind resistance to move relative to the rotor core 6. If there is no blocking structure, the movable stopper 1 will rotate. The present invention blocks the movable stopper 1 by setting a blocking structure, and cooperates with the wind resistance of the movable stopper 1, so that the movable stopper 1 can move to the aforementioned first position.

[0051] In some embodiments, Figure 1 and Figure 5As shown, the aforementioned blocking structure may include an elastic member 4, which may be a spring or a flexible plastic, etc. The elastic member 4 is used to be arranged between the movable stopper 1 and the rotor core 6, so that the movable stopper 1 is connected to the rotor core 6 through the elastic member 4, so that the rotor core 6 can drive the movable stopper 1 to move through the elastic member 4.

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

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

[0054] In a specific application example, the elastic member 4 is used to be pushed by the movable stopper 1 to undergo compression deformation when the rotor core 6 is running at the first speed w1, so as to provide elastic force to the movable stopper 1 and block the movable stopper 1. The greater the wind resistance to the movable stopper 1, the greater the compression deformation of the elastic member 4 caused by the movable stopper 1, and the greater the elastic force of the elastic member 4 to block the movable stopper 1. When the force on the movable stopper 1 reaches a balance, the movable stopper 1 can be kept in the aforementioned first position.

[0055] In order to install the aforementioned elastic member 4, in some embodiments, as Figure 1 and Figure 5 As shown, the aforementioned oil deflector structure also includes an oil deflector cap 2. The oil deflector cap 2 is used to be fixed on the rotor core 6. For example, the oil deflector cap 2 can be fixed on the rotor core 6 by fasteners such as rivets. The aforementioned elastic member 4 is connected to the oil deflector cap 2 so that the elastic member 4 is connected to the rotor core 6 through the oil deflector cap 2. It should be noted here that the connection between the elastic member 4 and the oil deflector cap 2 includes an inseparable connection and a separable abutment.

[0056] In some embodiments, Figure 5 , Figure 7-10As shown, the aforementioned oil deflector cap 2 has a bottom plate 21, and the oil deflector cap 2 is fixedly connected to the rotor core 6 through the bottom plate 21. The movable stopper 1 has a first surface 1a and a second surface 1b opposite to each other, and the first surface 1a is opposite to the bottom plate 21. The movable stopper 1 has an elastic member receiving groove 101 that penetrates the first surface 1a and the second surface 1b. A fixing member 3 is provided on the bottom plate 21, and the fixing member 3 has a fixing portion 34 located in the elastic member receiving groove 101. The fixing portion 34 can be integrally formed on the fixing member 3. Among them, the movable stopper 1 is connected to one end 41 of the elastic member through the groove wall of the elastic member receiving groove 101, and the oil deflector cap 2 is connected to the other end 42 of the elastic member through the fixing portion 34. It should be noted here that the connection between one end 41 of the elastic member and the groove wall of the elastic member receiving groove 101 includes an inseparable connection and a detachable abutment. The connection between the other end 42 of the elastic member and the fixing portion 34 also includes an inseparable connection and a detachable abutment.

[0057] In the above example, the fixing portion 34 of the fixing member cooperates with the groove wall of the elastic member accommodating groove 101 to achieve the installation of the elastic member 4 .

[0058] In some embodiments, Figure 5 As shown, the elastic member receiving groove 101 has a first end opposite to the fixing portion 34, and the elastic member receiving groove 101 is connected to the one end 41 of the elastic member through the groove wall of the first end. The movable stopper 1 is provided with a limiting cap 12 at the first end of the elastic member receiving groove 101, and the limiting cap 12 is used to limit the one end 41 of the elastic member to prevent the one end 41 of the elastic member from falling out from the first end of the elastic member receiving groove 101.

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

[0060] In some embodiments, Figure 5 As shown, the aforementioned fixing member 3 can be a first rivet, and the first rivet can be installed by tapping. Specifically, the first rivet has the same outer diameter at the beginning. 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 rivet hole 301 on the bottom plate 21, and then the other end of the first rivet is tapped to insert one end of the first rivet into the first rivet hole 301. The outer diameter of the other end of the first rivet is increased by tapping and deformation, thereby forming the aforementioned end cap 31. The end cap 31 can stop and limit the second surface 1b of the movable stopper 1 to prevent the movable stopper 1 from falling off the fixing member 3. The distance between the end cap 31 and the second surface 1b of the movable stopper 1 is h1.

[0061] In some embodiments, Fig. 9 As shown, the width of the elastic member receiving groove 101 is d3. Fig.12 As shown, the outer diameter of the aforementioned fixing portion 34 is d1, and the outer diameter of the end cap 31 is d2, wherein d1 is smaller than d3 and smaller than d2. Since d1 is smaller than d3, the fixing portion 34 will not contact the side wall of the elastic member receiving groove 101 in the width direction and hinder the movement of the movable stopper 1. At the same time, since d3 is smaller than d2, the end cap 31 can stop and limit the second surface 1b of the movable stopper 1 to prevent the movable stopper 1 from coming off the fixing member 3. In some embodiments, the matching clearance (i.e., d3-d1) between the aforementioned fixing portion 34 and the side wall of the elastic member receiving groove 101 is within the range of 5 mm to prevent displacement in the direction of the axis of the rotor core 6 and generate additional noise problems.

[0062] In some embodiments, Figure 5 As shown, the distance between the end cap 31 and the bottom plate 21 is h1, the thickness of the movable stopper 1 is h2, and h1 is greater than h2.

[0063] In some embodiments, Figure 1-2 As shown, the elastic member receiving groove 101 may be an arc-shaped groove. Figure 6 and Fig.11 As shown, a limiting column 32 is provided on the side of the fixing portion 34, and the other end 42 of the elastic member can be sleeved on the limiting column 32, so that the limiting column 32 can limit the other end 42 of the elastic member. A convex column 33 is provided on the opposite side walls of the limiting column 32. When the elastic member 4 is a spring, the convex column 33 can be inserted into the gap between two adjacent circles of the other end of the spring to fix the other end of the spring and prevent the spring from loosening.

[0064] In some embodiments, Figure 1 As shown, the movable stopper 1 is also used to be located at the second position when the rotor core 6 rotates at the second speed w2. The second speed w2 is less than the first speed w1; and in the second position, the movable stopper 1 leaves the flow hole 61 open.

[0065] The second rotation speed w2 can be low speed. When the rotor core 6 is running at low speed, if the movable stopper 1 still blocks part of the flow hole 61, the flow area will be reduced, which will increase the flow velocity of the flow hole 61, increase the flow friction loss, and increase the power consumption. In the above example, the present invention ensures that the flow hole 61 is not blocked and the flow area is larger by making the movable stopper 1 open the flow hole 61 when the rotor core 6 rotates at low speed, thereby reducing the flow friction loss and power consumption.

[0066] In some embodiments, Figure 1-2As shown, the movable stopper 1 may have a blocking portion 11. When the movable stopper 1 is located at the first position, the movable stopper 1 blocks the flow hole 61 where backflow occurs through the blocking portion 11. When the movable stopper 1 is located at the second position, the blocking portion 11 is located between two adjacent flow holes 61, so that the movable stopper 1 leaves the flow holes 61.

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

[0068] In some embodiments, the positioning convex bump and the positioning groove may both be hemispherical.

[0069] In some embodiments, when a blocking structure is provided on the rotor core 6, and the blocking structure includes an elastic member 4, and the elastic member 4 is used to be arranged between the movable block 1 and the rotor core 6, so that the movable block 1 is connected to the rotor core 6 through the elastic member 4, the elastic member 4 is used to gradually recover the deformation from the compressed state and push the movable block 1 to move 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 block 1 to move 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 stopper 1 to move at a relatively high first speed w1, the movable stopper 1 is subjected to relatively large wind resistance. At this time, the movable stopper 1 can overcome the friction resistance between the positioning protrusion and the positioning groove, so that the positioning protrusion is disengaged from the positioning groove to unlock the movable stopper 1. At the same time, the movable stopper 1 also pushes the elastic member 4 to undergo compression deformation, so that the movable stopper 1 can move to the aforementioned first position relative to the rotor core 6 to achieve the purpose of blocking at least part of the flow hole 61 where backflow occurs. When the speed of the rotor core 6 gradually decreases from the first speed w1 to the second speed w2, the wind resistance of the movable stopper 1 decreases. At this time, the elastic member 4 gradually recovers its deformation and pushes the movable stopper 1 to move to the aforementioned second position. When the speed of the rotor core 6 decreases to the second speed w2, the elastic member 4 pushes the movable stopper 1 to move to the aforementioned second position. At this time, the positioning protrusion on the movable stopper 1 is reinserted into the positioning groove to lock the movable stopper 1.

[0071] It should be noted here that: when the movable stopper 1 is located in the second position, the elastic member 4 can be in a natural state or in a state of being squeezed and deformed by the movable stopper 1. Among them, when the movable stopper 1 is located in the second position, if the elastic member 4 is in a natural state, when the rotor core 6 is running at the second speed w2, the wind resistance pressure of the movable stopper 1 is completely offset by the friction resistance of the positioning convex bulge and the positioning groove. When the movable stopper 1 is located in the second position, if the elastic member 4 is in a state of being squeezed and deformed by the movable stopper 1, when the rotor core 6 is running at the second speed w2, part of the wind resistance pressure of the movable stopper 1 is offset by the friction resistance of the positioning convex bulge and the positioning groove, and the other part can be offset by the elastic force applied by the elastic member 4 to the movable stopper 1.

[0072] In some embodiments, Figure 3 and Figure 4 As shown, when the aforementioned oil retaining structure further includes an oil retaining cap 2, and the oil retaining cap 2 is used to be fixed on the rotor core 6, the aforementioned second positioning portion 201 can be arranged on the oil retaining cap 2 to be connected to the rotor core 6 through the oil retaining cap 2. In a specific application example, the aforementioned second positioning protrusion can be arranged on the bottom plate 21 of the oil retaining cap 2, and the aforementioned first positioning portion 13 can be arranged on the first surface 1a of the movable stopper 1.

[0073] In some embodiments, the aforementioned oil retaining structure further includes a guiding structure, and the guiding structure is used to guide the movement of the movable stopper 1 relative to the rotor core 6 to improve the movement accuracy of the movable stopper 1 .

[0074] In order to realize the function of the aforementioned guiding structure, in some embodiments, as Figure 1-2As shown, when the oil retaining structure further includes an oil retaining cap 2, and the oil retaining cap 2 is used to be fixed on the rotor core 6, the aforementioned guide structure includes a guide groove 102 and a fixed column 7. One of the guide groove 102 and the fixed column 7 is arranged on the movable stopper 1, and the other is arranged on the oil retaining cap 2. The fixed column 7 is slidably matched with the guide groove 102. Among them, the fixed column 7 is used to cooperate with the guide groove 102 to guide the movement of the movable stopper 1 relative to the rotor core 6.

[0075] In the above example, the fixing column 7 cooperates with the guide groove 102 to realize the function of the aforementioned guide structure, and guides the movement of the movable stopper 1 relative to the rotor core 6 .

[0076] In some embodiments, the aforementioned fixing column 7 is disposed on the bottom plate 21 of the oil deflector cap 2. The fixing column 7 passes through the guide groove 102. The aforementioned guide groove 102 passes through the first surface 1a of the movable stopper 1 to the second surface 1b. Fig.12 As shown, the fixing column 7 is provided with another end cap 71 , and the other end cap 71 is located on the second surface 1 b side of the movable stopper 1 to stop and limit the second surface 1 b of the movable stopper 1 .

[0077] In some embodiments, the aforementioned fixing column 7 may be a second rivet, and the second rivet may be installed by tapping. Specifically, the second rivet initially has the same outer diameter from top to bottom. When installing the second rivet, one end of the second rivet is passed through the guide groove 102 and aligned with the second rivet hole on the bottom plate 21, and then the other end of the second rivet is tapped to insert one end of the second rivet into the second rivet hole. The outer diameter of the other end of the second rivet is increased by tapping and deformation, thereby forming the aforementioned other end cap 71. The other end cap 71 may stop and limit the second surface 1b of the movable stopper 1 to prevent the movable stopper 1 from falling off the fixing column 7. The distance between the other end cap 71 and the second surface 1b of the movable stopper 1 is h1.

[0078] In some embodiments, Fig. 9 and Fig.12 As shown, the width of the aforementioned guide groove 102 is d3', the outer diameter of the aforementioned fixed column 7 is d1', and the outer diameter of the other end cap 71 is d2', wherein d1' is smaller than d3' and smaller than d2'. Since d1' is smaller than d3', the fixed column 7 will not contact the side wall of the guide groove 102 in the width direction and hinder the movement of the movable stopper 1. At the same time, since d3' is smaller than d2', the other end cap 71 can stop and limit the second surface 1b of the movable stopper 1 to prevent the movable stopper 1 from escaping from the fixed column 7. In some embodiments, the matching clearance (i.e., d3'-d1') between the aforementioned fixed column 7 and the side wall of the guide groove 102 is within the range of 5 mm to prevent displacement in the direction of the axis of the rotor core 6 and generate additional noise problems.

[0079] In some embodiments, Fig. 9 As shown, the guide groove 102 can be an arc groove. d1 = d1', d2 = d2', d3 = d3'.

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

[0081] The present invention also provides a rotor assembly, which may include any one of the above-mentioned oil retaining structures.

[0082] The present invention also provides a motor, which includes any one of the above oil retaining structures, or includes the above rotor assembly.

[0083] The present invention also provides a compressor, which includes any one of the above oil retaining structures, or includes the above rotor assembly, or includes the above motor.

[0084] Among them, because the rotor assembly, motor and compressor all adopt the above-mentioned oil blocking structure, the movable block 1 can block the flow hole 61 where backflow occurs when the rotor core 6 runs at the first speed w1, such as high speed, thereby reducing the flow area of ​​​​the backflow and reducing the oil discharge rate of the compressor.

[0085] Among them, when the compressor using the above-mentioned oil baffle structure operates at different frequencies, the speed of the rotor core 6 is different. The oil baffle structure of the present invention can change the flow hole area of ​​the rotor core 6 at different rotation speeds through the movement of the movable baffle 1. Specifically, when the rotor core 6 rotates at high speed, the movable baffle 1 can block at least a part of the flow hole 61 where backflow occurs, so as to reduce the flow area of ​​the backflow and reduce the oil discharge rate. When the rotor core 6 rotates at a low speed, the movable baffle 1 opens the flow hole 61 to ensure that the flow area is maximized, thereby reducing the flow friction loss and reducing the power consumption.

[0086] When the aforementioned rotor core 6 runs at a high speed at the first speed w1, some of the flow holes 61 on the rotor core 6 will have backflow. In order to determine the flow holes 61 where backflow occurs, fluid simulation can be performed on the compressor model, and the flow holes 61 that are the backflow holes can be determined according to the flow state of the simulation results, and then the movable baffle 1 can be used to block the part of the backflow holes.

[0087] Among them, when the compressor is at a high speed of the first speed w1, the wind resistance of the movable stopper 1 overcomes the elastic force of the elastic member 4 and the resistance between the positioning convex hull and the positioning groove, so that the movable stopper 1 can move to the aforementioned first position under the impetus of its own wind resistance, so as to achieve the purpose of blocking the flow hole 61 where backflow occurs, reduce the flow area, and reduce the oil discharge rate. When the compressor is at a low speed of the second speed w2, the wind resistance of the movable stopper 1 is less than the sum of the elastic force of the elastic member 4 and the resistance between the stator convex hull and the positioning groove, thereby ensuring that the flow hole 61 is not blocked and the flow area is maximized.

[0088] like Figure 1-2 As shown, a balancing block 5 may be further provided on the aforementioned rotor core 6, and the balancing block 5 may be fixedly connected to the rotor core 6 by screws.

[0089] The oil retaining structure of the present invention has two states, such as Figure 1 As shown, Figure 1 The rotor core 6 is in a low speed state, and the rotor core 6 is running at a second speed w2; Figure 2 The state of the movable stopper 1 directly determines the flow area of ​​the specific flow hole 61, and the state of the movable stopper 1 is determined by the position of the fixing member 3 in the elastic member receiving groove 101. Figure 1 As shown, in the initial static state, the fixing member 3 is located on the right side of the elastic member accommodating groove 101, and the movable stopper 1 is locked by the elastic member 4 and the concave-convex fit of the positioning convex bump and the positioning groove. In the low speed state under the second speed w2, the rotor core 6 drives the movable stopper 1 to rotate, and the movable stopper 1 should be relatively displaced relative to the rotor core 6. However, due to insufficient wind resistance on the movable stopper 1, the locking state of the concave-convex fit of the positioning convex bump and the positioning groove cannot be released. At this time, the blocking portion 11 of the movable stopper 1 is between two adjacent flow holes 61, does not block the flow holes 61, and ensures that the flow area is maximized.

[0090] like Figure 2 As shown, when in the high speed state of the first speed w1, the wind resistance of the movable stopper 1 overcomes the elastic force of the elastic member 4 plus the critical force of the concave-convex fit to release the locked state and some friction, and the movable stopper 1 undergoes a considerable displacement, so that the blocking portion 11 of the movable stopper 1 at least blocks part of the flow hole 61 where reflux occurs, reducing the flow area of ​​the designated reflux flow hole 61; when the speed of the rotor core 6 drops from the first speed w1 to the second speed w2, driven by the elastic member 4, the movable stopper 1 returns to the initial second position to achieve resetting.

[0091] The technical solution of the present invention realizes that the flow state of the flow hole 61 changes with the increase of the operating frequency, and the flow area is maximized when the operating frequency is low, and the flow area of ​​the reflux is reduced by partially blocking the reflux hole when the operating frequency is high, thereby reducing the oil discharge rate.

[0092] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0093] The above description is only 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 principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An oil retaining structure for use with a rotor core (6), wherein the rotor core (6) has a flow hole (61) for partially causing backflow when operating at a first speed (w1); characterized in that: The oil blocking structure comprises a movable blocking member (1), wherein the movable blocking member (1) is used to be connected to the rotor core (6) so as to rotate together with the rotor core (6) and to move to a first position relative to the rotor core (6) when the rotor core (6) operates at a first speed (w1); wherein, in the first position, the movable blocking member (1) blocks at least part of the flow hole (61) where backflow occurs.

2. The oil retaining structure according to claim 1, characterized in that: The rotor core (6) is provided with a blocking structure; when the rotor core (6) rotates at the first speed (w1), the movable blocking member (1) is used to be pushed by its own wind resistance and cooperate with the blocking of the blocking structure to move relative to the rotor core (6) to the first position.

3. The oil retaining structure according to claim 1, characterized in that: The blocking structure comprises an elastic member (4), and the elastic member (4) is used to be arranged between the movable blocking member (1) and the rotor iron core (6), so that the movable blocking member (1) is connected to the rotor iron core (6) through the elastic member (4).

4. The oil retaining structure according to claim 3, characterized in that: The elastic member (4) is used to be pushed by the movable stopper (1) to undergo compression deformation when the rotor core (6) is running at the first speed (w1), so as to provide elastic force to the movable stopper (1) and block the movable stopper (1).

5. The oil retaining structure according to claim 3 or 4, characterized in that: It also comprises an oil deflector cap (2) which is used to be fixed on the rotor core (6); the elastic member (4) is connected to the oil deflector cap (2) so that the elastic member (4) is connected to the rotor core (6) through the oil deflector cap (2).

6. The oil retaining structure according to claim 5, characterized in that: The oil deflector cap (2) has a bottom plate (21), and the oil deflector cap (2) is fixedly connected to the rotor core (6) via the bottom plate (21); the movable stopper (1) has a first surface (1a) and a second surface (1b) opposite to each other, and the first surface (1a) is opposite to the bottom plate (21); the movable stopper (1) has an elastic member receiving groove (101) penetrating the first surface (1a) and the second surface (1b), and a fixing member (3) is provided on the bottom plate (21), and the fixing member (3) has a fixing portion (34) located in the elastic member receiving groove (101); The movable stopper (1) is connected to one end (41) of the elastic member via the groove wall of the elastic member accommodating groove (101), and the oil deflector cap (2) is connected to the other end (42) of the elastic member via the fixing portion (34).

7. The oil retaining structure according to claim 6, characterized in that: The fixing member (3) has an end cap (31), and the end cap (31) is located on the second surface (1b) side of the movable stopper (1) to stop and limit the second surface (1b) of the movable stopper (1).

8. The oil retaining structure according to any one of claims 1-4, 6-7, characterized in that: The movable stopper (1) is also used to be located at a second position when the rotor core (6) operates at a second rotational speed (w2); wherein the second rotational speed (w2) is less than the first rotational speed (w1); and in the second position, the movable stopper (1) clears the flow hole (61).

9. The oil retaining structure according to claim 8, characterized in that: The movable stopper (1) is provided with a first positioning portion (13), and the rotor core (6) is provided with a second positioning portion (201), wherein one of the first positioning portion (13) and the second positioning portion (201) is a positioning convex bump, and the other is a positioning groove; wherein when the movable stopper (1) is located at the second position, the positioning convex bump is inserted into the positioning groove; and the movable stopper (1) is used to drive the first positioning portion (13) to disengage from the second positioning portion (201) when the rotor core (6) is running at a first rotation speed (w1).

10. The oil retaining structure according to claim 8, characterized in that: When a blocking structure is provided on the rotor core (6), and the blocking structure includes an elastic member (4), and the elastic member (4) is used to be arranged between the movable block (1) and the rotor core (6), so that the movable block (1) is connected to the rotor core (6) through the elastic member (4), the elastic member (4) is used to gradually recover the deformation from the compressed state and push the movable block (1) to move to the second position when the speed of the rotor core (6) gradually decreases from the first speed (w1) to the second speed (w2), and push the movable block (1) to move to the second position when the speed of the rotor core (6) decreases to the second speed (w2).

11. The oil retaining structure according to claim 9 or 10, characterized in that: When the oil deflector structure further comprises an oil deflector cap (2), and the oil deflector cap (2) is used to be fixed on the rotor core (6), the second positioning portion (201) is arranged on the oil deflector cap (2) so as to be connected to the rotor core (6) via the oil deflector cap (2).

12. The oil retaining structure according to any one of claims 1-4, 6-7, 9-10, characterized in that: It also comprises a guiding structure, wherein the guiding structure is used to guide the movement of the movable stopper (1) relative to the rotor core (6).

13. The oil retaining structure according to claim 12, characterized in that: When the oil deflector structure further includes an oil deflector cap (2), and the oil deflector cap (2) is used to be fixed on the rotor core (6), the guide structure includes a guide groove (102) and a fixed column (7); one of the guide groove (102) and the fixed column (7) is arranged on the movable stopper (1), and the other is arranged on the oil deflector cap (2); the fixed column (7) is slidably matched with the guide groove (102); wherein the fixed column (7) is used to cooperate with the guide groove (102) to guide the movement of the movable stopper (1) relative to the rotor core (6).

14. The oil retaining structure according to claim 13, characterized in that: When the movable stopper (1) is located at the first position, the fixed column (7) abuts against a groove wall at one end of the guide groove (102); And / or, when the movable stopper (1) is also used to move to a second position relative to the rotor core (6) when the rotor core (6) operates at a second speed (w2), and when the movable stopper (1) is located at the second position, the fixed column (7) abuts against the other end groove wall of the guide groove (102).

15. A rotor assembly, characterized in that: The invention comprises the oil retaining structure described in any one of claims 1 to 14.

16. A motor, characterized in that: It comprises the oil retaining structure described in any one of claims 1 to 14, or comprises the rotor assembly described in claim 15.

17. A compressor, characterized in that: It comprises the oil retaining structure described in any one of claims 1 to 14, or comprises the rotor assembly described in claim 15, or comprises the motor described in claim 16.

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