Rotor baffle assembly, motor and compressor

Abstract

The invention provides a rotor baffle assembly, a motor and a compressor, the rotor baffle assembly comprises a rotor baffle and a weight increasing structure, the rotor baffle is provided with a reamed hole, the reamed hole is provided with an axis, the axis of the reamed hole is parallel to the axis of the rotor baffle, and the weight increasing structure is arranged along the axis direction of the reamed hole. The rotor baffle is provided with at least two reamed holes, each reamed hole is of a hole structure with at least two unequal cross sectional areas, the number of the reamed holes is at least two, the at least two reamed holes are formed in the circumferential direction of the rotor baffle at intervals, and the weighting structure is arranged in at least one reamed hole and / or on the periphery of at least one reamed hole. According to the invention, the weighting structure can be arranged in the reamed hole and / or on the periphery of the reamed hole, so that the weighting structure is limited and prevented from falling off, the fixing and limiting effects of the weighting structure are improved, and the problem that the overall size and the weight of the motor are relatively large due to a rotor dynamic balance calibration mode in the prior art is solved.

Description

Technical Field

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

[0002] The currently developed integrated permanent magnet motor system is an integrated motor body and drive system. The motor comes with its own drive system and instructions, and the client no longer needs to configure additional inverters and drive drives. This improves the adaptability of load development and makes terminal applications simpler.

[0003] The motor system development takes the drive module into consideration. In order to optimize and design the structure size in the most reasonable way, the motor body size needs to be reasonably developed. The compression or control of the body size directly affects the inner cavity size, which further affects the internal scheme design.

[0004] The inner cavity of the motor body is mainly composed of the stator and the rotor. Under the condition of meeting the electromagnetic scheme design and electrical safety, the space size is greatly compressed. This in turn affects the design of the rotor baffle, which is a component of the rotor. The rotor is composed of a rotor core, magnetic steel, a rotor baffle and rivets. The main functions of the rotor baffle are to limit the magnetic steel to ensure the consistency of the magnetic steel assembly into the core, and to rivet the core punching to prevent the end faces on both sides from warping due to external force or magnetic tension. At the same time, due to the limitation of the assembly position of the baffle, the calibration of the rotor dynamic balance must also be considered structurally. The most effective way to improve the vibration of the whole machine and increase the long-term mechanical life of the motor is to calibrate the dynamic balance of the rotor.

[0005] The calibration methods of rotor dynamic balancing are generally divided into two methods: de-weighting and weighting. Among them, the de-weighting method is mostly designed as non-magnetic soft metal materials with increased material thickness. During calibration, some materials are removed by tools or equipment to achieve the balance requirements. Weighting is mostly designed to add balancing screws or balancing clay on the rotor baffle. Regardless of the above method, a baffle with a certain space thickness is required to provide space for weighting / de-weighting, so the axial size of the rotor will be increased overall.

[0006] Existing rotor dynamic balancing calibration methods include calibration using screw weighting, which requires machining threaded holes on the rotor baffle. In order to ensure the assembly thickness with the screws, the thickness of the baffle needs to be increased as much as possible, resulting in a larger overall size and weight of the motor. In addition, due to the thick baffle, its own weight will also cause a certain amount of imbalance, affecting the dynamic balance of the rotor.

[0007] Since the calibration method of rotor dynamic balance in the prior art has technical problems such as large overall size and weight of the motor, the present invention studies and designs a rotor baffle assembly, a motor and a compressor. Summary of the invention

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the rotor dynamic balance calibration method in the prior art that the overall size and weight of the motor are large, thereby providing a rotor baffle assembly, a motor and a compressor.

[0009] In order to solve the above problems, the present invention provides a rotor baffle assembly, which includes:

[0010] A rotor baffle and a weighting structure, wherein a counterbore is arranged on the rotor baffle, wherein the counterbore has an axis, wherein the axis of the counterbore is parallel to the axis of the rotor baffle, and along the axial direction of the counterbore, the counterbore is a hole structure having at least two locations with unequal cross-sectional areas, wherein there are at least two counterbores, and at least two counterbores are spaced apart in the circumferential direction of the rotor baffle, and the weighting structure is arranged in at least one counterbore and / or on the periphery of at least one counterbore.

[0011] In some embodiments,

[0012] From one axial end to the other axial end of the expansion hole, the expansion hole has a hole structure in which the cross-sectional area increases successively, decreases successively, increases first and then decreases, or decreases first and then increases.

[0013] In some embodiments,

[0014] The expansion hole includes a through hole structure extending from one axial end surface of the rotor baffle to the other axial end surface, namely, a first expansion hole.

[0015] In some embodiments,

[0016] A boss structure is also provided on an axial end face of the rotor baffle, and the boss structure is provided at the first reaming hole. The inner periphery of the boss structure forms a second reaming hole, and the inner circumferential wall of the second reaming hole is connected to the inner circumferential wall of the first reaming hole. The reaming hole includes the first reaming hole and the second reaming hole.

[0017] In some embodiments,

[0018] The weighting structure can be disposed in the first expansion hole and / or the second expansion hole, and the weighting structure can be disposed on the periphery of the boss structure.

[0019] In some embodiments,

[0020] When the cross-sectional area of ​​the expanded hole increases successively from one axial end to the other axial end thereof, from the axial end of the first expanded hole away from the second expanded hole to the axial end of the second expanded hole away from the first expanded hole, the overall hole structure connecting the first expanded hole and the second expanded hole is a structure with a gradually increasing cross-sectional area.

[0021] In some embodiments,

[0022] When the cross-sectional area of ​​the expanded hole decreases successively from one axial end to the other axial end thereof, from the axial end of the first expanded hole away from the second expanded hole to the axial end of the second expanded hole away from the first expanded hole, the overall hole structure connecting the first expanded hole and the second expanded hole is a structure with a gradually decreasing cross-sectional area.

[0023] In some embodiments,

[0024] When the cross-sectional area of ​​the expanded hole decreases successively from one axial end to the other axial end thereof, from the axial end of the first expanded hole away from the second expanded hole to the axial end of the second expanded hole away from the first expanded hole, the overall hole structure connecting the first expanded hole and the second expanded hole is a structure in which the cross-sectional area first gradually increases and then gradually decreases.

[0025] In some embodiments,

[0026] When the cross-sectional area of ​​the expanded hole decreases successively from one axial end to the other axial end thereof, from the axial end of the first expanded hole away from the second expanded hole to the axial end of the second expanded hole away from the first expanded hole, the overall hole structure connecting the first expanded hole and the second expanded hole is a structure in which the cross-sectional area first gradually decreases and then gradually increases.

[0027] In some embodiments,

[0028] The boss structure is formed by stamping, that is, by stamping a punch from the other axial end surface of the rotor baffle toward the rotor baffle, first forming the first expanded hole, and finally forming the second expanded hole and the boss structure.

[0029] In some embodiments,

[0030] The weighting structure is a clay structure, which is bonded to the inner wall of the expansion hole and to the outer peripheral wall of the boss structure. The clay structure can be fixed at the above-mentioned bonding position after being exposed to air and dried.

[0031] In some embodiments,

[0032] The axial end surface of the rotor baffle is also protrudingly provided with ribs, and at least two of the ribs are arranged along the circumferential direction, and the weighting structure can be arranged between adjacent ribs.

[0033] The present invention also provides a motor, which comprises the above-mentioned rotor baffle assembly.

[0034] The present invention also provides a compressor, which comprises the above-mentioned motor.

[0035] The rotor baffle assembly, motor and compressor provided by the present invention have the following beneficial effects:

[0036] 1. The present invention provides a countersunk hole on the rotor baffle, and the countersunk hole is a hole structure with at least two places with unequal cross-sectional areas along its axial direction. A weighting structure can be provided in the countersunk hole and / or on the periphery of the countersunk hole to limit the weighting structure and prevent it from coming out, thereby improving the fixed limiting effect of the weighting structure. Therefore, the weighting structure can be provided at the countersunk hole position at one or several specific circumferential positions as required, and the weight of the weighting structure can be adjusted, thereby achieving the effect of effectively adjusting the dynamic balance of the rotor, and there is no need to provide threaded holes to condition the dynamic balance by means of screws, which can avoid increasing the thickness of the rotor baffle due to the provision of threaded holes, and avoid the situation where the overall size and weight of the motor are large, thereby effectively solving the problem of the overall size and weight of the motor being large caused by the rotor dynamic balancing calibration method in the prior art.

[0037] 2. The rotor baffle structure of the present invention has the thinnest thickness and can be designed to be the size of two core punching sheets, with the maximum compression space size, which provides the most reasonable and optimized structural design for the development of the whole machine; the ultra-thin rotor baffle of the present invention, in addition to reducing the weight of its own materials and reducing costs, also reduces the size of the whole machine structure, reduces the amount of structural materials used for the whole machine, reduces the weight of the rotor, and controls lower costs. At the same time, the baffle is simple to stamp, and the shape can be randomly pressed, the production process is simpler, the practicability is high, and the processing cost is reduced; the rotor baffle of the present invention is extremely thin, which can reduce the imbalance caused by its own weight, and provide the possibility of lower imbalance of the rotor; the lower imbalance can most effectively improve the vibration of the whole machine, thereby further improving the noise, and at the same time, it also improves the long-term mechanical damage and structural fatigue failure caused by vibration, and even further improves the chain damage and failure caused by the transmission system of bad vibration to the downstream load; although the rotor baffle of the present invention is thinner, the dynamic balancing hole is realized by a variety of divergent stamping methods, which provides a combination strength support for the weighted calibration method, realizes high-strength bonding in the smallest space, and ensures the long-term reliability of the calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a front structural diagram of a motor in the prior art;

[0039] Figure 2 It is a structural diagram of a weight-removing and balanced rotor baffle in the prior art;

[0040] Figure 3 It is a structural diagram of a weighted and balanced rotor baffle in the prior art;

[0041] Figure 4 is a structural diagram of a weighted and balanced rotor baffle according to Example 1 of the present invention;

[0042] Figure 5 yes Figure 4 A partial enlarged view of part A in FIG.

[0043] Figure 6 is a structural diagram of a weighted and balanced rotor baffle according to Embodiment 2 of the present invention;

[0044] Figure 7 yes Figure 6 A partial enlarged view of part B in FIG.

[0045] Figure 8 is a structural diagram of a weighted and balanced rotor baffle according to Embodiment 3 of the present invention;

[0046] Fig. 9 yes Figure 8 A partial enlarged view of part C in FIG.

[0047] Fig.10 It is a three-dimensional structural diagram of a rotor baffle according to a fourth embodiment of the present invention.

[0048] The reference numerals are:

[0049] 1. Rotor baffle; 11. Front baffle; 12. Rear baffle; 2. Rotor shaft; 3. Expansion hole; 31. First expansion hole; 32. Second expansion hole; 4. Boss structure; 5. Rib; 6. Core punching sheet; 7. Magnetic steel; 8. Bearing seat; 9. Screw. DETAILED DESCRIPTION

[0050] 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.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] like Figure 4-10As shown, the present invention provides a rotor baffle assembly, which includes:

[0057] A rotor baffle 1 and a weighting structure, wherein a counterbore 3 is provided on the rotor baffle 1, wherein the counterbore 3 has an axis, wherein the axis of the counterbore 3 is parallel to the axis of the rotor baffle 1, and along the axial direction of the counterbore 3, the counterbore 3 is a hole structure having at least two locations with unequal cross-sectional areas, wherein there are at least two counterbores 3, and at least two counterbores 3 are spaced apart in the circumferential direction of the rotor baffle 1, and the weighting structure is provided in at least one counterbore 3 and / or on the periphery of at least one counterbore 3.

[0058] The present invention arranges a counterbore on the rotor baffle, and the counterbore is a hole structure with at least two places with unequal cross-sectional areas along its axial direction. A weighting structure can be arranged in the counterbore and / or on the periphery of the counterbore to limit the weighting structure and prevent it from coming out, thereby improving the fixed limiting effect of the weighting structure. Therefore, the weighting structure can be arranged at the counterbore position at one or several specific circumferential positions as required, and the weight of the weighting structure can be adjusted, thereby achieving the effect of effectively adjusting the dynamic balance of the rotor, and there is no need to arrange threaded holes to condition the dynamic balance by means of screws, which can avoid increasing the thickness of the rotor baffle due to the opening of threaded holes, and avoid the situation where the overall size and weight of the motor are large, thereby effectively solving the problem of the overall size and weight of the motor being large caused by the rotor dynamic balancing calibration method in the prior art.

[0059] The existing integrated motor structure is as follows Figure 1 , which consists of the motor body and the electric drive control. As can be seen from the figure, the electric drive will lengthen the axial size of the whole machine, so under the development of performance and safety, the whole machine structure is compressed as much as possible, which can not only control the cost, but also reduce the actual application installation space. Under the premise of meeting the correction requirements, designing a thinner rotor baffle can maximize the use of space size.

[0060] The calibration of rotor dynamic balance will directly affect the motor vibration level, such as Figure 1 As shown, the rotor is composed of a core punching sheet 6, a front baffle 11, a rear baffle 12, a magnetic steel 7, and a rotor shaft 2. During calibration, after the rotor shaft 2 is installed, it is supported by the bearings 8 at both ends to calibrate the balance. The rotor baffle is generally designed as Figure 2 , 3 As shown, Figure 2 To remove the duplication, Figure 3It is a weighting method. In the deweighting method, the baffle is designed as a simple aluminum ring. When checking the weight, the material is directly removed from the baffle ring to achieve the balance requirement. In the weighting method, the balance putty or balance screw is inserted into the limit hole designed on the baffle ring to achieve correction. At this time, a higher-sized baffle needs to be designed, otherwise the balance screw cannot be installed, the putty cannot be better contacted, and there may be a risk of falling off in long-term use. Both methods require a higher-sized space for operation and cannot meet strict space size requirements.

[0061] The present invention newly develops a rotor baffle, the thinnest thickness of which can be designed to be the thickness of two punching sheets, meeting the structural design considerations of the uneven punching sheets at both ends of the stack, and realizing the demand for dynamic balance correction. The correction of the new baffle is achieved by weighting, and the punching holes designed on the baffle meet the dynamic balance correction limit and provide bonding strength. The wall thickness of the baffle design material is relatively thin, which can be achieved by stamping, and no secondary processing and material waste are required.

[0062] The unbalanced holes of the present invention are designed according to the number of rotor poles. The simplest is one or more balancing holes per rotor pole. The balancing holes are evenly distributed, avoiding magnetic steel slots. Under the premise of multiple holes, the number of balancing holes per pole is equal, and they are evenly distributed over the pole arc width as much as possible. The punching distribution circle is selected according to the actual correction amount and the designed correction radius. The material is required to be punched and stretched but not punched out, and to be in a divergent state after the hole is opened. The divergence is manifested in two ways: inward expansion and outward expansion, which can be combined to form three states: inward expansion, outward expansion, and inward expansion + outward expansion.

[0063] The present invention overcomes the problems of the existing deweighting method, which requires ensuring the structural strength of the rotor baffle and making the rotor baffle thicker, and the existing weighting method (screw hole), which also requires ensuring the threaded installation strength and requiring the rotor baffle to be made thicker. The present invention effectively completes the rotor balancing weight while reducing the axial thickness of the rotor baffle, thereby reducing the overall structural size and weight of the machine. Compared with the structure of the straight hole mastic, the weighting structure of the present invention forms an effective limiting effect, is not easy to fall off, and can ensure the above-mentioned balance calibration of the rotor.

[0064] In some embodiments,

[0065] From one axial end to the other axial end of the expansion hole 3, the expansion hole 3 is a hole structure whose cross-sectional area increases successively, decreases successively, increases first and then decreases, or decreases first and then increases.

[0066] This is the preferred structural form of the hole expansion structure of the present invention, that is, the hole structure that increases, decreases, increases first and then decreases, or decreases first and then increases along its axial direction, which can effectively play a limiting role on the weighting structure (preferably clay) on its inner and outer peripheries, thereby achieving a firm rotor dynamic balancing calibration without drilling threaded holes, the weighting structure is not easy to fall off, and the rotor baffle does not need to be made very thick, and can be made very thin, so that the overall size of the motor is reduced and the weight is reduced.

[0067] The rotor baffle structure of the present invention has the thinnest thickness and can be designed to be the size of two iron core punching sheets, with the maximum compression space size, which provides the most reasonable and optimized structural design for the development of the whole machine; the ultra-thin rotor baffle of the present invention, in addition to reducing the weight of its own materials and reducing costs, also compresses the size of the whole machine structure, reduces the amount of structural materials used for the whole machine, reduces the weight of the rotor, and controls lower costs. At the same time, the baffle is simple to stamp, and the shape can be randomly pressed, the production process is simpler, the practicability is high, and the processing cost is reduced; the rotor baffle of the present invention is extremely thin, which can reduce the imbalance caused by its own weight, and provide the possibility of lower imbalance of the rotor; the lower imbalance can most effectively improve the vibration of the whole machine, thereby further improving the noise, and at the same time, it also improves the long-term mechanical damage and structural fatigue failure caused by vibration, and even further improves the chain damage and failure caused by the transmission system of bad vibration to the downstream load; although the rotor baffle of the present invention is thinner, the dynamic balancing hole is realized by a variety of divergent stamping methods, which provides a combination strength support for the weighted calibration method, realizes high-strength bonding in the smallest space, and ensures the long-term reliability of the calibration.

[0068] In some embodiments,

[0069] The expansion hole 3 includes a through hole structure penetrating from one axial end surface of the rotor baffle 1 to the other axial end surface, that is, a first expansion hole 31 .

[0070] This is the first preferred structural form of the expansion hole of the present invention, that is, a through hole structure that penetrates from one axial end face of the rotor baffle to the other axial end face, that is, the first expansion hole, which can be a hole structure that increases successively, decreases successively, increases first and then decreases, or decreases first and then increases along its axial direction. A weighting structure can be set therein to form a limit for the weighting structure, so that the weighting structure is not easy to fall off, and the axial thickness of the rotor baffle can be reduced, so that the size and weight of the whole motor are reduced.

[0071] In some embodiments,

[0072] A boss structure 4 is also provided on an axial end face of the rotor baffle 1. The boss structure 4 is provided at the first reaming hole 31. The inner periphery of the boss structure 4 forms a second reaming hole 32. The inner peripheral wall of the second reaming hole 32 is connected to the inner peripheral wall of the first reaming hole 31. The reaming hole 3 includes the first reaming hole 31 and the second reaming hole 32.

[0073] The present invention further preferably provides a boss structure on an axial end face of the rotor baffle (preferably the axial end face away from the rotor core), so that the axial length of the expanded hole can be set longer on the basis of the first expanded hole of the rotor baffle, so that the weighting structure can be set on the inner periphery of the extended second expanded hole, and can also be set on the outer periphery of the boss structure forming the second expanded hole, thereby effectively increasing the space for the setting of the weighting structure, improving the effect of the balance calibration of the rotor, and can further reduce the thickness of the rotor baffle, and further reduce the size and weight of the motor.

[0074] In some embodiments,

[0075] The weighting structure can be disposed in the first expansion hole 31 and / or the second expansion hole 32 , and the weighting structure can be disposed on the periphery of the boss structure 4 .

[0076] The present invention provides a weighting structure in both the first and second expanded holes, and a weighting structure can also be provided on the periphery of the boss structure, thereby further increasing the space for providing the weighting structure, improving the effect of balancing and calibrating the rotor, further reducing the thickness of the rotor baffle, and further reducing the size and weight of the motor.

[0077] like Figure 6-7 , in some embodiments,

[0078] When the cross-sectional area of ​​the expanded hole 3 increases successively from one axial end to the other axial end thereof, from the axial end of the first expanded hole 31 away from the second expanded hole 32 to the axial end of the second expanded hole 32 away from the first expanded hole 31, the overall hole structure connecting the first expanded hole 31 and the second expanded hole 32 is a structure with a gradually increasing cross-sectional area.

[0079] This is the preferred structural form of the hole expansion of Example 2 of the present invention, that is, the hole cross-sectional area is a hole structure that gradually increases from the first hole expansion to the second hole expansion, and a weighting structure can be arranged inside the first and second holes expansions, especially a weighting structure can be arranged on the periphery of the boss structure, which can effectively limit the weighting structure and prevent it from falling off, thereby ensuring the calibration of the dynamic balance of the rotor, reducing the thickness of the rotor baffle, and reducing the size and weight of the motor.

[0080] like Figure 6-7As shown, the hole expansion of the present invention adopts an outward expansion method. After the stamping boss, the space is small inside and large outside. The realization of the outward expansion can be guaranteed by the mold tooling to achieve linear outward expansion or arc outward expansion. The arc outward expansion is reasonably designed and can provide a larger external installation space and bonding strength.

[0081] After stamping, the outermost outer circle of the stretched boss forms an acute angle with the end face of the baffle. Consider filling the inside and outside of the conical space when installing the weighted glue. Double limit increases the bonding strength of the glue. At the same time, the installation space of the inner and outer glue provides greater feasibility of unbalance correction, reducing the number of corrections and calibration positions. With internal expansion, burrs and cracks are allowed during stamping and stretching. If necessary, a regular tooth-shaped gap can be formed by pre-punching the knife edge and post-limiting stamping to improve the bonding strength and limit.

[0082] like Figure 4-5 As shown, in some embodiments,

[0083] When the cross-sectional area of ​​the expanded hole 3 decreases successively from one axial end to the other axial end thereof, from the axial end of the first expanded hole 31 away from the second expanded hole 32 to the axial end of the second expanded hole 32 away from the first expanded hole 31, the overall hole structure connecting the first expanded hole 31 and the second expanded hole 32 is a structure with a gradually decreasing cross-sectional area.

[0084] This is the preferred structural form of the hole expansion in Example 1 of the present invention, that is, the hole cross-sectional area is a hole structure that gradually decreases from the first hole expansion to the second hole expansion, and a weighting structure can be arranged on the periphery of the boss structure, especially a weighting structure can be arranged inside the first and second holes expansions, which can effectively limit the weighting structure and prevent it from falling off, thereby ensuring the calibration of the dynamic balance of the rotor, reducing the thickness of the rotor baffle, and reducing the size and weight of the motor.

[0085] like Figure 4-5 As shown, the hole expansion of the present invention adopts the method of internal expansion, and a boss is formed by punching. A conical space is formed in the boss. The space is large and the opening is small, so as to form a trapezoid. The installation of the cement is considered to be filled in the conical space. The conical cut is allowed to have burrs and cracks. After filling and air drying, in addition to forming a limit with the installation space itself, the burrs and cracks formed by the punching also increase the bonding of the cement to prevent loosening and falling off. It is also possible to add a process during stamping, pre-stamping positioning, forming a uniformly distributed blade, punching and stretching forming rules, and a toothed conical space with high connection strength, which further increases the bonding force of the cement assembly.

[0086] like Figure 8-9 , in some embodiments,

[0087] When the cross-sectional area of ​​the expanded hole 3 decreases successively from one axial end to the other axial end thereof, from the axial end of the first expanded hole 31 away from the second expanded hole 32 to the axial end of the second expanded hole 32 away from the first expanded hole 31, the overall hole structure connecting the first expanded hole 31 and the second expanded hole 32 is a structure in which the cross-sectional area first gradually increases and then gradually decreases.

[0088] This is the preferred structural form of the expansion hole in Example 3 of the present invention, that is, in the direction from the first expansion hole to the second expansion hole, the hole cross-sectional area is a hole structure that gradually increases and then gradually decreases. A weighting structure can be especially arranged inside the first and second expansion holes, and a weighting structure can be especially arranged on the periphery of the boss structure, both of which can play a reliable limiting role for the weighting structure, prevent the weighting structure from falling off to the greatest extent, ensure the calibration effect on the dynamic balance of the rotor, reduce the thickness of the rotor baffle, and reduce the size and weight of the motor.

[0089] like Figure 8-9 , in some embodiments,

[0090] When the cross-sectional area of ​​the expanded hole 3 decreases successively from one axial end to the other axial end thereof, from the axial end of the first expanded hole 31 away from the second expanded hole 32 to the axial end of the second expanded hole 32 away from the first expanded hole 31, the overall hole structure connecting the first expanded hole 31 and the second expanded hole 32 is a structure in which the cross-sectional area first gradually decreases and then gradually increases.

[0091] This is the preferred structural form of the hole expansion of Example 3 of the present invention, that is, in the direction from the first hole expansion to the second hole expansion, the hole cross-sectional area is a hole structure that gradually decreases and then gradually increases. A weighting structure can be especially arranged inside the first and second holes expansions, and a weighting structure can be especially arranged on the periphery of the boss structure, both of which can play a role in reliable limiting the weighting structure, prevent the weighting structure from falling off to the greatest extent, ensure the calibration of the dynamic balance of the rotor, reduce the thickness of the rotor baffle, and reduce the size and weight of the motor.

[0092] like Figure 8-9 As shown, the hole expansion method of the present invention combines the two methods of internal expansion and external expansion. The mold needs one stamping and one fall back to stretch the protruding space from large to small and then to large. The front half of the internal space changes from large to small to form a space limit. After the glue is filled and air-dried, the shape and the inner cavity size form a limit and are not easy to fall off. At the same time, the small to large space meets the feasibility of external filling of the glue, and the acute angle space formed with the end face of the baffle not only increases the amount of glue installed while limiting the glue, further improving the correction amount of the imbalance, and reducing the number of corrections and the correction position. In addition, it can also be done by Figure 7The tooth-shaped notch is formed by punching, which further improves the bonding and ensures the life and reliability of the machine in more complex environments such as high temperature and high humidity.

[0093] In some embodiments,

[0094] The boss structure 4 is formed by stamping, that is, by stamping a punch from the other axial end surface of the rotor baffle 1 toward the rotor baffle 1 to first form the first expanded hole 31 and finally form the second expanded hole 32 and the boss structure 4 .

[0095] This is the preferred formation method and forming process of the boss structure of the present invention, that is, a flange is formed on the side away from the rotor core by stamping, thereby forming the boss structure, which is effectively used to set a weighting structure on both the inner and outer peripheries thereof, thereby limiting the weighting structure, ensuring the calibration of the dynamic balance of the rotor, reducing the thickness of the rotor baffle, and reducing the size and weight of the motor.

[0096] The present invention designs and develops a rotor baffle, the assembly method of which is consistent with the existing structural method, the difference being that the structure is thinner while meeting the bonding strength requirements.

[0097] The new rotor baffle of the present invention is designed to meet the requirements of low thickness for structural development, and the bonding strength is improved by stamping, without increasing the installation size and space to ensure the bonding strength. The thinner and lighter rotor baffle avoids the imbalance introduced by its own weight, reduces material consumption, and makes the cost more advantageous.

[0098] The new rotor baffle is basically the same as the original structure and calibration method, without the investment of new production process and tooling equipment, and is highly feasible. Figures 4 to 10 There are no special requirements for the holes in stamping and stretching. Cracks and multiple cracks are allowed. Verification shows that cracked balancing holes are easier to adhere to the balancing glue.

[0099] In some embodiments,

[0100] The weighting structure is a clay structure, which can be bonded to the inner wall of the expansion hole 3 and to the outer peripheral wall of the boss structure 4. The clay structure can be fixed at the above-mentioned bonding position after being exposed to air and dried.

[0101] This is the preferred structural form of the weighting structure of the present invention. By selecting it as a clay structure, it can be set on the inner and / or outer periphery of the expanded hole that needs to be calibrated. After being exposed to air and dried, its hardness becomes hard and sticks to the inner or outer periphery of the expanded hole. The expanded hole structure can also limit the clay, avoiding the situation where the clay is easy to fall off due to the use of a straight hole structure, thereby ensuring the calibration of the dynamic balance of the rotor, reducing the thickness of the rotor baffle, and reducing the size and weight of the motor.

[0102] The rotor baffle of the present invention is simpler in design in terms of structure and size, and uses less material, which reduces both the processing cost of finished product production and the material cost. The rotor baffle is stamped and does not require secondary size processing. Divergent stamping and secondary molding overlap to increase the bonding area and bonding strength between the adhesive and the baffle, ensuring the reliability of long-term bonding. At the same time, the size of the baffle can be compressed, and the size of the whole machine can be further compressed, providing a larger adjustment space for matching installation and reducing the cost investment of structural parts.

[0103] The stretching dynamic balancing hole of the present invention has various structures: an inward expansion type, an outward expansion type, and a (inward expansion + outward expansion) type.

[0104] 1) The inner expansion type is to fill the balancing clay in the hole. The shrinkage of the hole mouth can prevent the clay from being thrown out under the action of centrifugal force, thereby improving the operation reliability. At the same time, the bottom is large and the mouth is small, so more balancing clay can be filled in to increase the balancing amount.

[0105] 2) Outward expansion type balancing hole, the function is to stick the balancing glue to the outer ring of the balancing hole at the same time, because the hole wall is allowed to crack (attached Figure 7 It is a 3D schematic diagram, which shows the cracking state of the hole wall. In fact, the width and depth of these cracks are completely different and irregular. Of course, the cracking can also be specially designed), which not only increases the pasting area of ​​the balancing glue, but also increases the firmness of the pasting. The inner and outer walls are pasted with balancing glue at the same time, and the glue is connected together through the cracks, which is very firm. Pasting it on the outer circle can increase the balance angle of the glue, and dynamic balancing can be done more accurately;

[0106] 3) (inward expansion + outward expansion) type combines the advantages of both, but the baffle stamping will have an additional process.

[0107] In some embodiments,

[0108] like Fig.10 The axial end surface of the rotor baffle 1 is also protrudingly provided with ribs 5 , and at least two ribs 5 are arranged along the circumferential direction, and the weighting structure can be arranged between adjacent ribs 5 .

[0109] This is the preferred structural form of Example 4 of the present invention. By further providing ribs on the axial end face of the rotor baffle (preferably on the side away from the rotor core) and providing a weighting structure between two adjacent ribs, it can further achieve the effect of calibrating the dynamic balance of the rotor, further reduce the axial thickness of the rotor baffle, and reduce the size and weight of the motor.

[0110] The present invention also provides a motor, which comprises the above-mentioned rotor baffle assembly.

[0111] The present invention arranges inner and / or outer expansion holes (inner expansion means that the cross-sectional area gradually decreases from the first to the second expansion hole, and outer expansion means that the cross-sectional area gradually increases from the first to the second expansion hole) on the rotor baffle, and arranges counterweight materials therein and / or on the periphery. Compared with the method of adding weights with screws, the weight can be increased or decreased according to actual conditions, and the counterweight can be increased. Compared with screw holes, there is no need to drill threaded holes (the assembly thickness needs to be ensured), and the thickness of the baffle can be reduced, thereby reducing the thickness, weight, size and space, and reducing the imbalance caused by the baffle's own weight.

[0112] It has the following beneficial effects:

[0113] 1. The rotor baffle can greatly reduce the size of the baffle while ensuring the requirements of dynamic balance correction;

[0114] 2. The rotor baffle is formed by stamping the raw material plate, without the need for casting processing, the mold is simple to implement and the production and processing are simpler;

[0115] 3. The punching holes of the baffle plate do not need to undergo conventional processing such as deburring and blunting, and the burrs of the cut are used to provide greater bonding strength.

[0116] 4. The punching holes of the baffle plate can be formed in one-shot or two-shot ways. One-shot forming uses two ways: inner expansion and outer expansion. The inner expansion mainly considers the correction inside the hole, while the outer expansion mainly considers the correction outside the hole. The two-shot forming can realize both inner expansion and outer expansion at the same time. The appearance of inner expansion and outer expansion can be realized through different forms of irregular surfaces such as bevels and curved surfaces to further enhance the bonding strength.

[0117] The present invention also provides a compressor, which comprises the above-mentioned motor.

[0118] 1. The hole expansion of the present invention can be designed according to the number of rotor poles to avoid the magnetic steel slot. The material is stretched and bulged when punching downwards. No size and precision requirements are made. An opening is allowed to release the pressure. The implementation is simpler and meets the requirements of increasing the contact area and limiting the balance mud.

[0119] 2. The outermost circle of the rotor baffle is punched and rolled inward to form a semi-open pipe space. The corresponding holes of the pipe are punched in to form a limit. Advantage: The dynamic balance is corrected on the largest outer circle, which makes it easier to correct the imbalance.

[0120] 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. A rotor baffle assembly, characterized in that: include: A rotor baffle (1) and a weighting structure, wherein a reaming hole (3) is arranged on the rotor baffle (1), the reaming hole (3) has an axis, the axis of the reaming hole (3) is parallel to the axis of the rotor baffle (1), and along the axis direction of the reaming hole (3), the reaming hole (3) is a hole structure having at least two locations with unequal cross-sectional areas, there are at least two reaming holes (3), at least two reaming holes (3) are arranged at intervals in the circumferential direction of the rotor baffle (1), and the weighting structure is arranged in at least one of the reaming holes (3) and / or on the periphery of at least one of the reaming holes (3).

2. The rotor baffle assembly according to claim 1, characterized in that: From one axial end to the other axial end of the expansion hole (3), the expansion hole (3) has a hole structure in which its cross-sectional area increases successively, decreases successively, increases first and then decreases, or decreases first and then increases.

3. The rotor baffle assembly according to claim 1 or 2, characterized in that: The expansion hole (3) comprises a through hole structure penetrating from one axial end surface of the rotor baffle (1) to the other axial end surface, namely, a first expansion hole (31).

4. The rotor baffle assembly according to claim 3, characterized in that: A boss structure (4) is also provided on an axial end face of the rotor baffle (1); the boss structure (4) is provided at the first reaming hole (31); a second reaming hole (32) is formed on the inner periphery of the boss structure (4); an inner peripheral wall of the second reaming hole (32) is connected to an inner peripheral wall of the first reaming hole (31); and the reaming hole (3) includes the first reaming hole (31) and the second reaming hole (32).

5. The rotor baffle assembly according to claim 4, characterized in that: The weighting structure can be arranged in the first expansion hole (31) and / or the second expansion hole (32), and the weighting structure can be arranged on the periphery of the boss structure (4).

6. The rotor baffle assembly according to claim 4, characterized in that: When the cross-sectional area of ​​the expansion hole (3) increases successively from one axial end to the other axial end thereof, from the axial end of the first expansion hole (31) away from the second expansion hole (32) to the axial end of the second expansion hole (32) away from the first expansion hole (31), the overall hole structure connecting the first expansion hole (31) and the second expansion hole (32) is a structure with a gradually increasing cross-sectional area.

7. The rotor baffle assembly according to claim 4, characterized in that: When the cross-sectional area of ​​the expansion hole (3) decreases gradually from one axial end to the other axial end thereof, from the axial end of the first expansion hole (31) away from the second expansion hole (32) to the axial end of the second expansion hole (32) away from the first expansion hole (31), the overall hole structure connecting the first expansion hole (31) and the second expansion hole (32) is a structure with a gradually decreasing cross-sectional area.

8. The rotor baffle assembly according to claim 4, characterized in that: When the cross-sectional area of ​​the expansion hole (3) decreases gradually from one axial end to the other axial end thereof, from the axial end of the first expansion hole (31) away from the second expansion hole (32) to the axial end of the second expansion hole (32) away from the first expansion hole (31), the overall hole structure connecting the first expansion hole (31) and the second expansion hole (32) is a structure in which the cross-sectional area first gradually increases and then gradually decreases.

9. The rotor baffle assembly according to claim 4, characterized in that: When the cross-sectional area of ​​the expansion hole (3) decreases gradually from one axial end to the other axial end thereof, from the axial end of the first expansion hole (31) away from the second expansion hole (32) to the axial end of the second expansion hole (32) away from the first expansion hole (31), the overall hole structure connecting the first expansion hole (31) and the second expansion hole (32) is a structure in which the cross-sectional area first gradually decreases and then gradually increases.

10. The rotor baffle assembly according to claim 4, characterized in that: The boss structure (4) is formed by stamping, that is, by stamping a punch from the other axial end surface of the rotor baffle (1) toward the rotor baffle (1), first forming the first expanded hole (31), and finally forming the second expanded hole (32) and the boss structure (4).

11. The rotor baffle assembly according to claim 4, characterized in that: The weighting structure is a clay structure, which is bonded to the inner wall of the expansion hole (3) and to the outer peripheral wall of the boss structure (4). The clay structure can be fixed at the above-mentioned bonding position after being exposed to air and dried.

12. The rotor baffle assembly according to any one of claims 1 to 11, characterized in that: The axial end surface of the rotor baffle (1) is also protrudingly provided with ribs (5), at least two of the ribs (5) are arranged along the circumferential direction, and the weighting structure can be arranged between adjacent ribs (5).

13. A motor, characterized in that: A rotor baffle assembly comprising any one of claims 1-12.

14. A compressor, characterized in that: Including the motor as claimed in claim 13.

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