Rotor baffle, rotor structure, motor and hoist

Abstract

This utility model relates to the field of motor technology and discloses a rotor baffle, rotor structure, motor, and traction machine. The rotor baffle includes: a baffle body with multiple counterweight hole groups arranged radially at intervals on its end face, each counterweight hole group including multiple counterweight holes arranged circumferentially at intervals; and at least one counterweight block disposed within at least one of the counterweight holes. This utility model, through the design of radially spaced multiple sets of counterweight hole groups and circumferentially distributed counterweight holes within each group, provides more selectable counterweight positions. The corresponding hole position can be selected to install the counterweight block according to the specific orientation and size of the initial rotor imbalance, achieving near-precision dynamic balance in one step, significantly improving the correction efficiency. The rationally designed openings, through topology optimization to distribute stress, can reduce the maximum stress concentration factor, effectively improving the deformation resistance of the baffle body. The baffle body formed by the openings can reduce weight while meeting strength requirements.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a rotor baffle, rotor structure, motor and traction machine. Background Technology

[0002] The rotor baffle on the rotor structure is an important component installed at both ends of the rotor core and connected to the shaft. It is mainly used for dynamic balancing of the motor shaft, preventing axial movement of the shaft core, and blocking the axial movement of the magnets.

[0003] Current rotor baffles typically have a ring of counterweight holes spaced circumferentially around their outer sidewalls, with counterweights placed in these holes to achieve dynamic balance. However, the distribution of counterweight holes on current rotor baffles is limited, the spacing between the holes is relatively fixed, and the selectable correction positions are limited. In actual operation, it is often necessary to adjust the position or weight of the counterweights multiple times to approach the target balance accuracy. Utility Model Content

[0004] In view of this, the present invention provides a rotor baffle, rotor structure, motor and traction machine to solve the problem that the current rotor baffle only has one ring of counterweight holes, resulting in limited selectable correction positions.

[0005] In a first aspect, this utility model provides a rotor baffle, comprising:

[0006] The baffle body has multiple counterweight hole groups arranged radially at intervals on its end face, and each counterweight hole group includes multiple counterweight holes arranged circumferentially at intervals.

[0007] At least one counterweight, wherein the counterweight is disposed within at least one of the counterweight holes.

[0008] The beneficial effects of the above-mentioned rotor baffle are as follows: This utility model provides more optional counterweight positions by setting multiple sets of counterweight holes at radial intervals and distributing counterweight holes at intervals in the inner circumference of each set. According to the specific orientation and size of the initial imbalance of the rotor, the corresponding hole position can be selected to install the counterweight block, so as to approach or achieve the high-precision dynamic balance requirements in one go, which significantly improves the correction efficiency.

[0009] The rationally designed openings (such as annular array holes) of this utility model can reduce the maximum stress concentration factor by 30%-50% through topology optimization to distribute stress, effectively improving the deformation resistance of the baffle body.

[0010] The baffle body formed by the opening in this utility model can reduce weight while meeting the strength requirements.

[0011] In one alternative embodiment, the counterweight holes corresponding to the positions of each counterweight hole group are aligned in a straight line in the radial direction.

[0012] The beneficial effects of the above technical solution are as follows: The radially aligned counterweight hole design of this utility model ensures that the holes at corresponding positions in different counterweight hole groups are distributed along the same radius line. This allows for precise selection of the corresponding radial position of the counterweight hole to fill the counterweight block based on the specific location and magnitude of the initial imbalance of the rotor. Compared with the traditional single-ring circumferentially distributed counterweight holes, this utility model can more flexibly compensate for the imbalance at different radii, significantly improving the accuracy of dynamic balancing correction.

[0013] In one alternative embodiment, each of the counterweight hole groups is arranged at equal intervals along the radial direction on the end face of the baffle body.

[0014] In one alternative embodiment, the counterweight holes in each of the counterweight hole groups are arranged at equal intervals along the circumferential direction on the end face of the baffle body.

[0015] In one optional embodiment, the counterweight hole is a threaded hole; the counterweight block fits against the end face of the baffle body and is fixed in the counterweight hole by bolts.

[0016] The beneficial effects of the above technical solution are as follows: the fit between the threaded hole and the bolt can form a mechanical locking structure. Compared with the traditional method of filling the smooth hole with counterweight mud or adhering materials, the bolt-fixed counterweight block is in close contact with the end face of the baffle, which can effectively resist the centrifugal force and vibration under high-speed rotation, prevent the counterweight block from shifting or falling off, and ensure the long-term stability of dynamic balance.

[0017] In one alternative embodiment, the counterweight is disposed between two adjacent or non-adjacent counterweight holes in the same counterweight hole group.

[0018] In one optional embodiment, the counterweight is disposed between two counterweight holes in adjacent counterweight hole groups that are either in corresponding or non-corresponding positions.

[0019] In one alternative implementation, the counterweight is disposed between two counterweight holes that are not adjacent to each other and whose positions are either corresponding or not corresponding.

[0020] The beneficial effects of the above technical solution are as follows: the setting of counterweights between different hole groups or hole positions provides more optional correction positions. The optimal position for installing counterweights can be flexibly selected according to the specific orientation and size of the initial imbalance of the rotor, so as to approach or achieve the high-precision dynamic balance requirements in one go, reduce the tedious operation of multiple adjustments to cut or adhered materials in traditional technology, and improve correction efficiency.

[0021] In one optional embodiment, the baffle body is an aluminum baffle body; and / or,

[0022] The counterweight is an aluminum counterweight or an alloy counterweight.

[0023] The beneficial effects of the above technical solution are as follows: aluminum material has low density, which can effectively reduce the overall weight of the motor when used as the baffle body; aluminum or alloy counterweights also have the advantage of being lightweight, which helps to reduce the overall weight of the motor.

[0024] Secondly, this utility model provides a rotor structure, including:

[0025] A rotor core comprising a plurality of rotor laminations stacked sequentially;

[0026] Multiple magnets are respectively mounted on the rotor core;

[0027] Two or more rotor baffles of the first aspect, wherein the two rotor baffles are respectively disposed at both ends of the rotor core;

[0028] The rotating shaft passes through the rotor core and two rotor baffles, and is fixedly connected to the rotor core and the two rotor baffles respectively.

[0029] In one alternative embodiment, two pressure rings are interference-fitted onto the rotating shaft, each pressure ring being in contact with the end face of one of the rotor baffles away from the rotor core, in order to restrict the axial position of the two rotor baffles.

[0030] The beneficial effects of the above technical solution are as follows: the pressure rings fitted on the rotating shaft are more firmly connected, the two pressure rings are respectively attached to the corresponding rotor baffles, and the two pressure rings press and fix the two rotor baffles, which can effectively resist the vibration, impact and other loads during motor operation, prevent the rotor baffles from being displaced due to axial force, and ensure the axial stability of the rotor core.

[0031] Furthermore, because this invention employs an interference fit, no additional fasteners are required; axial positioning is achieved solely through the direct engagement of the pressure ring and the rotating shaft, reducing the number of parts. Simultaneously, the design of the pressure ring fitting snugly against the rotor baffle end face avoids the complex process of traditional multi-part fixing, simplifying the overall structure of the motor rotor and reducing assembly difficulty and manufacturing costs.

[0032] In one alternative embodiment, the rotor laminations are divided into multiple circumferentially arranged magnetic pole regions, each magnetic pole region having two V-shaped magnetic slots.

[0033] The beneficial effects of the above technical solution are as follows: by symmetrically arranging two magnetic steel slots, the magnetic flux generated by the magnet is more evenly distributed in the air gap, reducing magnetic field distortion and thus reducing harmonics and noise.

[0034] In one optional embodiment, each rotor lamination is provided with a plurality of magnet slots, each magnet is embedded in a portion of the magnet slot, and the portion of each magnet slot where the magnet is not embedded forms an air gap hole; each air gap hole is respectively connected to a counterweight hole on the rotor baffle.

[0035] The beneficial effects of the above technical solution are as follows: the counterweight hole and air gap hole on the rotor baffle at the front end and the counterweight hole on the rotor baffle at the rear end form a channel, which can guide the flow of air or coolant and accelerate the heat dissipation inside the rotor structure.

[0036] Thirdly, this utility model provides an electric motor, comprising:

[0037] The stator structure has a rotor structure accommodating cavity at its center. The stator structure includes a stator core and a stator winding. The inner wall surface of the stator core is provided with a plurality of stator slots spaced circumferentially, and the stator winding is accommodated in the stator slots.

[0038] The rotor structure of the second aspect above is provided in which the rotor structure is disposed within the rotor structure accommodating cavity and has an air gap with the stator structure.

[0039] In one alternative embodiment, the stator slot is an oblique slot that is not parallel to the axis of rotation. The oblique slot weakens the tooth harmonics by causing them to cancel each other out, thereby effectively reducing electromagnetic noise and vibration.

[0040] Fourthly, this utility model provides a traction machine, including the motor mentioned in the third aspect above.

[0041] In one alternative implementation, the stator winding is a round wire winding and / or a flat wire winding. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 A schematic diagram of the structure of a rotor baffle provided by this utility model;

[0044] Figure 2 A plan view of a rotor structure provided by this utility model;

[0045] Figure 3A magnet arrangement diagram of a rotor structure provided by this utility model;

[0046] Figure 4 A schematic diagram showing the arrangement of the counterweight of an electric motor on the baffle body, provided by this utility model;

[0047] Figure 5 This utility model provides a structural schematic diagram of a motor without a rotating shaft.

[0048] Figure 6 This is a schematic diagram of the structure of an electric motor provided by this utility model.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Rotor baffle; 11. Baffle body; 12. Counterweight hole; 13. Counterweight block; 14. Bolt; 15. Mounting key;

[0051] 2. Rotor core; 21. Magnet slot; 22. Air gap hole;

[0052] 3. Magnets;

[0053] 4. Shaft;

[0054] 5. Pressure ring;

[0055] 6. Stator structure; 61. Stator core; 62. Stator slot. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0057] The following is combined with Figures 1 to 6 The present invention describes in detail the rotor baffle of the first aspect of the present invention, the rotor structure of the second aspect of the present invention, and the motor of the third aspect of the present invention.

[0058] According to an embodiment of the present invention, in a first aspect, a rotor baffle is provided, combined with... Figure 1 As shown, the device includes a baffle body 11 and a counterweight 13. Multiple counterweight hole groups are radially spaced on the end face of the baffle body 11, and each counterweight hole group includes multiple circumferentially spaced counterweight holes 12. At least one counterweight 13 is provided, and the counterweight 13 is disposed within at least one counterweight hole 12. By adding one or more sets of counterweights, the rotor structure ultimately achieves dynamic balance.

[0059] The rotor baffle described above, with its design of multiple sets of counterweight holes arranged radially and counterweight holes distributed circumferentially within each set, provides more optional counterweight positions. According to the specific location and size of the initial imbalance of the rotor, the corresponding hole position can be selected to install the counterweight block, so as to approach or achieve the high-precision dynamic balance requirements in one go, which significantly improves the correction efficiency.

[0060] A well-designed opening (such as an annular array of holes) can reduce the maximum stress concentration factor by 30%-50% through topology optimization to distribute stress, effectively improving the deformation resistance of the baffle body 11.

[0061] The baffle body 11 formed by the opening can reduce weight while meeting the strength requirements.

[0062] In some embodiments, the counterweight holes 12 corresponding to the positions of each counterweight hole group are aligned radially. In this embodiment, the radially aligned counterweight hole design ensures that the holes at corresponding positions in different counterweight hole groups are distributed along the same radial line. This allows for precise selection of the corresponding radial position to fill the counterweight block based on the specific location and magnitude of the initial rotor imbalance (such as local mass deviations caused by uneven distribution of the shaft keyway or magnets). Compared to the traditional single-ring circumferentially distributed counterweight holes, this embodiment can more flexibly compensate for imbalances at different radii, significantly improving the accuracy of dynamic balancing correction.

[0063] Each counterweight hole group is arranged at equal intervals along the radial direction on the end face of the baffle body 11.

[0064] In each set of counterweight holes, the counterweight holes 12 are evenly spaced along the circumference on the end face of the baffle body 11. More specifically, the counterweight holes are evenly arranged at 15° intervals along the circumference of the baffle body 11, and detachable counterweights are installed using the holes in the baffle body 11.

[0065] In some embodiments, the counterweight hole 12 is a threaded hole. The counterweight block 13 fits against the end face of the baffle body 11 and is fixed in the counterweight hole 12 by bolts 14, which can be M3-M5 bolts. The engagement of the threaded hole and the bolt forms a mechanical locking structure. Compared with the traditional method of filling the smooth hole with counterweight mud or adhering materials, the bolt-fixed counterweight block fits tightly against the end face of the baffle, which can effectively resist centrifugal force and vibration under high-speed rotation, prevent the counterweight block from shifting or falling off, and ensure the long-term stability of dynamic balance.

[0066] In some embodiments, the counterweight 13 is disposed between two adjacent or non-adjacent counterweight holes 12 in the same counterweight hole group, which can accurately compensate for the initial imbalance at different angles within the radius level, cover the multi-angle imbalance problem in the same radial layer, and avoid the limitations of single-hole correction.

[0067] As an alternative embodiment, the counterweight 13 is disposed between two counterweight holes 12 in adjacent counterweight hole groups that are either corresponding or not. Adjacent counterweight hole groups are evenly spaced radially, with corresponding holes along the same straight line and non-corresponding holes distributed along different straight lines. By placing counterweights between adjacent groups of holes, the imbalance in adjacent radial regions can be adjusted simultaneously, covering a wider radial range and solving the problem of incomplete correction caused by insufficient radial coverage in traditional single-circle hole positions.

[0068] As an alternative embodiment, the counterweight 13 is disposed between two counterweight holes 12 that are either in corresponding or non-corresponding positions in non-adjacent counterweight hole groups. Since the non-adjacent counterweight hole groups are further apart radially, multi-level coordinated correction can be performed to address large-scale mass deviations from the center to the edge when the counterweight is disposed, significantly improving the overall dynamic balance coverage.

[0069] The different ways of setting counterweights between different hole groups or hole positions provide more optional correction positions. The optimal position for installing counterweights can be flexibly selected according to the specific orientation and size of the initial imbalance of the rotor, so as to approach or achieve high-precision dynamic balance requirements in one go. This reduces the tedious operation of multiple adjustments to cut or adhere to materials in traditional technology and improves correction efficiency.

[0070] In some embodiments, the baffle body 11 is an aluminum baffle body. Aluminum material has a low density, and as a baffle body, it can effectively reduce the overall weight of the motor.

[0071] The counterweight 13 is made of aluminum or alloy. Aluminum or alloy counterweights also have the advantage of being lightweight, which helps to reduce the overall weight of the motor.

[0072] According to an embodiment of the present invention, in a second aspect, in conjunction with Figures 1 to 6 As shown, a rotor structure is provided, including a rotor core 2, a magnet 3, a rotor baffle 1, and a rotating shaft 4.

[0073] The rotor core 2 comprises multiple rotor laminations stacked sequentially.

[0074] Multiple magnets 3 are provided, each magnet 3 is disposed on the rotor core 2. More specifically, the magnets 3 can be attached to the surface of the rotor core 2 or embedded inside the rotor core 2.

[0075] There are two rotor baffles 1, which are respectively located at both ends of the rotor core 2.

[0076] The rotating shaft 4 passes through the rotor core 2 and the two rotor baffles 1, and is fixedly connected to the rotor core 2 and the two rotor baffles 1 respectively.

[0077] In some embodiments, when the rotor structure is an embedded magnet rotor structure, each rotor lamination is provided with a plurality of magnet slots 21, and each magnet 3 is embedded in a portion of the magnet slot 21. The portion of each magnet slot 21 where no magnet 3 is embedded forms an air gap hole 22. Each air gap hole 22 is respectively connected to a counterweight hole 12 on the rotor baffle 1. More specifically, the counterweight hole and air gap hole 22 on the rotor baffle at the front end and the counterweight hole on the rotor baffle at the rear end form a channel, which can guide the flow of air or coolant and accelerate the heat dissipation inside the rotor structure.

[0078] Specifically, the magnet groove 21 is designed as a dovetail groove to make the magnet 3 more securely fixed.

[0079] In some embodiments, two pressure rings 5 ​​are interference-fitted onto the rotating shaft 4. Each pressure ring 5 is in contact with the end face of a rotor baffle 1 away from the rotor core 2 to restrict the axial position of the two rotor baffles 1. The pressure rings 5 ​​interference-fitted onto the rotating shaft 4 provide a more secure connection. The two pressure rings 5 ​​are respectively in contact with the corresponding rotor baffles 1, and the two pressure rings 5 ​​press and fix the two rotor baffles 1, which can effectively resist vibration, impact and other loads during motor operation, prevent the rotor baffles 1 from displacing due to axial force (such as axial movement when the rotor core rotates), and ensure the axial stability of the rotor core.

[0080] Furthermore, since this embodiment uses interference fit, no additional fasteners are required. Axial positioning is achieved solely through the direct engagement of the pressure ring and the rotating shaft, reducing the number of parts. At the same time, the design of the pressure ring fitting snugly against the end face of the rotor baffle avoids the complex processes of traditional multi-part fixing (such as welding or multiple bolts), simplifying the overall structure of the motor rotor and reducing assembly difficulty and manufacturing costs.

[0081] More specifically, the pressure ring 5 is a steel pressure ring, which has the characteristics of high strength and high rigidity, and can effectively withstand the axial load during motor operation.

[0082] To further improve the connection stability between the rotor baffle 1 and the rotating shaft 4, an installation key 15 is provided on the inner wall of the inner ring of the rotor baffle 1. The installation key 15 is adapted to the keyway of the rotating shaft 4. The installation key 15 on the rotor baffle 1 is positioned in the keyway to secure the two together.

[0083] In some embodiments, the rotor laminations are divided into multiple circumferentially arranged magnetic pole regions, and each magnetic pole region is provided with two V-shaped magnetic steel slots 21. By symmetrically arranging the two magnetic steel slots, the magnetic flux generated by the magnets is more evenly distributed in the air gap, reducing magnetic field distortion and thus reducing harmonics and noise.

[0084] According to an embodiment of the present invention, in a third aspect, a motor is provided, combined with... Figures 1 to 6As shown, it includes a stator structure 6 and a rotor structure. A rotor structure receiving cavity is located at the center of the stator structure 6. The stator structure 6 includes a stator core 61 and stator windings. Multiple stator slots 62 are circumferentially spaced on the inner wall of the stator core 61, and the stator windings are housed within the stator slots 62. The rotor structure is disposed within the rotor structure receiving cavity and has an air gap with the stator structure 6.

[0085] The motor also includes a motor housing, which has heat dissipation structures such as heat sink fins or cooling channels.

[0086] The rotor baffle 1 is located close to the rotor structure cavity on one side. When the rotor baffle 1 rotates at high speed, it uses its own mechanical strength to counteract the centrifugal force and prevent the magnet 3 from moving axially or falling off.

[0087] In this embodiment, the stator slot 62 is set as an oblique slot that is not parallel to the axis of the rotating shaft 4. The oblique slot weakens the tooth harmonics by making the tooth harmonics of the windings different in phase and canceling each other out, thereby effectively reducing electromagnetic noise and vibration.

[0088] According to an embodiment of the present invention, in a fourth aspect, a traction machine is provided, including the aforementioned motor. The round wire winding is a winding made of wire with a circular cross-section, while the flat wire winding is a winding made of wire with a rectangular cross-section. In the traction machine of this embodiment, the stator winding can be either a round wire winding or a flat wire winding. During the manufacturing process of the traction machine, the use of either a round wire winding or a flat wire winding can be flexibly selected according to different needs.

[0089] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A rotor baffle, characterized by, include: The baffle body (11) has a plurality of counterweight hole groups arranged radially at intervals on its end face, and each counterweight hole group includes a plurality of counterweight holes (12) arranged circumferentially at intervals. At least one counterweight (13) is disposed in at least one of the counterweight holes (12).

2. The rotor baffle according to claim 1, characterized in that, Each of the aforementioned counterweight hole groups is arranged radially at equal intervals on the end face of the baffle body (11); and / or The counterweight holes (12) in each of the counterweight hole groups are arranged at equal intervals along the circumference on the end face of the baffle body (11).

3. The rotor baffle of claim 1, wherein, The counterweight hole (12) is a threaded hole; the counterweight block (13) is fitted with the end face of the baffle body (11) and is fixed in the counterweight hole (12) by bolts.

4. The rotor baffle of claim 1, wherein The counterweight (13) is disposed between two adjacent or non-adjacent counterweight holes (12) in the same counterweight hole group; or The counterweight (13) is positioned between two counterweight holes (12) in adjacent counterweight hole groups, either correspondingly or not. The counterweight (13) is positioned between two counterweight holes (12) that are not adjacent to each other or whose positions are not corresponding.

5. A rotor structure, characterized in that, include: The rotor core (2) comprises a plurality of rotor laminations stacked sequentially. Multiple magnets (3) are respectively disposed on the rotor core (2); The rotor baffle (1) of any one of claims 1-4, wherein the two rotor baffles (1) are respectively disposed at both ends of the rotor core (2); The rotating shaft (4) passes through the rotor core (2) and the two rotor baffles (1), and is fixedly connected to the rotor core (2) and the two rotor baffles (1) respectively.

6. The rotor structure of claim 5, wherein Two pressure rings (5) are interference-fitted on the rotating shaft (4). Each pressure ring (5) is in contact with the end face of a rotor baffle (1) away from the rotor core (2) to restrict the axial position of the two rotor baffles (1).

7. The rotor structure according to claim 5 or 6, characterized in that, Each rotor lamination is provided with a plurality of magnet slots (21), and each magnet (3) is embedded in a portion of the magnet slot (21). The area of ​​each magnet slot (21) where the magnet (3) is not embedded forms an air gap hole (22). Each air gap hole (22) is connected to a counterweight hole (12) on the rotor baffle (1).

8. An electric motor, characterized in that, include: The stator structure (6) has a rotor structure accommodating cavity at its center. The stator structure (6) includes a stator core (61) and a stator winding. The inner wall surface of the stator core (61) is provided with a plurality of stator slots (62) spaced circumferentially. The stator winding is accommodated in the stator slots (62). The rotor structure according to any one of claims 5-7, wherein the rotor structure is disposed within the rotor structure accommodating cavity and has an air gap between it and the stator structure (6).

9. The motor according to claim 8, characterized in that, The stator slot (62) is an inclined slot that is not parallel to the axis of the rotating shaft (4).

10. A traction machine, characterized in that, The motor includes the one described in claim 8 or 9, wherein the stator winding is a round wire winding and / or a flat wire winding.

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