A novel motor rotor ventilation cooling structure

Abstract

The utility model provides a novel motor rotor ventilation cooling structure, include: the rotor iron core is equipped with in the outside of the rotation axis central position, the stator is equipped in the outside of rotor iron core, and the outside of stator is connected with motor casing, and the ventilation hole is equidistance and is set in the side of rotor iron core close to the direction of rotation axis, and the end ring is located in the front and back two sides of rotation axis, and the air cylinder is through bolt connection and is equipped in the side of end ring far from rotation axis, the utility model adopts the air cylinder in the connecting bottom plate for annular, and the connecting bottom plate far from the side of rotation axis surrounds and sets up the oblique turbine vane no. 1, and turbine vane no. 1 rotates with the rotation of rotation axis and rotor iron core, can suck the air of motor casing inside one side and push the air compression acceleration to the direction of rotor iron core, the heat dissipation of rotor iron core, sets up turbine vane no. 2 and increases an air cutting area, improves the air volume of turbine vane no. 1 output, and the air cylinder does not contact with rotation axis, need not to adjust balance when the air cylinder installation, and the assembly adopts the high efficiency of fixed efficiency through bolt and is suitable for mass production.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor design, and in particular to the field of rotor ventilation and cooling structure, specifically a novel motor rotor ventilation and cooling structure. Background Technology

[0002] Currently, the common airflow paths for three-phase asynchronous motors are single-fan cooling airflow paths and dual-fan cooling airflow paths:

[0003] A single-fan airflow structure requires a large inner fan, which results in greater mechanical losses and affects motor efficiency. Furthermore, since hot air exits from the other end, the winding and bearing temperatures at that point will be relatively high.

[0004] Dual-fan cooling can solve the above-mentioned shortcomings of single-fan cooling, but it is labor-intensive and time-consuming to implement. First, two fans need to be made, and keyways need to be machined on the motor shaft. Installing the inner fan into the keyway on the motor shaft is troublesome. Moreover, the machining precision requirements for the fan and the mounting slot are very high. Otherwise, it is impossible to control the balance of the two ends of the shaft. After assembly, the balance of the shaft needs to be adjusted by multiple experiments. It is inefficient and greatly increases the production and assembly cost of the motor, making it unsuitable for mass production. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a novel motor rotor ventilation and cooling structure to solve the difficulties of the prior art.

[0006] To achieve the above and other related objectives, this utility model provides a novel motor rotor ventilation and cooling structure, comprising:

[0007] Rotating shaft 1, with rotor core 2 sleeved on the outer side of the center of the rotating shaft 1;

[0008] Stator 3, which is sleeved on the outside of rotor core 2, and the outside of stator 3 is connected to motor housing;

[0009] Ventilation holes 22 are equally spaced on one side of the rotor core 2 near the shaft 1;

[0010] End ring 4, the end ring 4 is located on the front and rear sides of the rotating shaft 1, and the end ring 4 is bolted to the stator 3 in the direction away from the rotating shaft 1;

[0011] The air duct 5 is bolted to the end ring 4 on the side away from the rotating shaft 1.

[0012] According to the preferred embodiment, an air gap 21 is provided between the stator 3 and the rotor core 2.

[0013] According to the preferred scheme, the ventilation hole 22 is a first heat dissipation channel of the rotor core 2, and the air gap 21 is a second heat dissipation channel of the rotor core 2.

[0014] According to the preferred scheme, the air duct 5 comprises:

[0015] A connecting bottom plate 51 is sleeved on the side of the end ring 4 away from the rotating shaft 1 through bolt connection;

[0016] A first turbine fan blade 52 is provided with a plurality of first turbine fan blades 52 which are arranged at equal intervals on the side of the connecting bottom plate 51 away from the rotating shaft;

[0017] A second fan blade 53 is provided with a plurality of second fan blades 53 which are arranged at intervals on the top of the first turbine fan blade 52;

[0018] A stabilizing hole 54 is arranged at the top corner of the side of the second fan blade 53, a pin is arranged in the stabilizing hole 54, and the bottom of the pin is connected with the connecting bottom plate 51.

[0019] According to the preferred scheme, the first turbine fan blade 52 is arranged in an inclined manner.

[0020] According to the preferred scheme, the second fan blade 53 is arranged in an integrated manner with the first turbine fan blade 52 which is in contact with the bottom.

[0021] According to the preferred scheme, the fan blades composed of the second fan blade 53 and the first turbine fan blade 52 arranged in an integrated manner have higher strength stability than those assembled through buckling and are lighter in weight than those assembled through bolting.

[0022] According to the preferred scheme, intervals are arranged between the second fan blades 53, and the second fan blades 53 are not in contact with each other.

[0023] The utility model discloses a rotating shaft, rotor core, air gap, ventilation hole, end ring and air duct, the connecting bottom plate of air duct is annular, and the connecting bottom plate is arranged around the inclined first turbine fan blade on the side away from the rotating shaft, and the first turbine fan blade rotates along with the rotation of the rotating shaft and the rotor core, can suck the air of one side in the motor shell and push the air to the direction of rotor core to heat dissipation of rotor core, and the second fan blade is arranged to increase an air cutting area, improve the air volume of the output of the first turbine fan blade, and the air duct does not contact with the rotating shaft, so that the balance does not need to be adjusted when the air duct is installed, the assembly adopts the high efficiency of the sleeve through the bolt fixing, and is suitable for batch production.

[0024] The most preferred embodiment of the utility model will be described in more detail below with reference to the drawings, so that the features and advantages of the utility model can be easily understood. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The figure shows a cross-sectional structure schematic diagram of the present application;

[0026] Figure 2 The figure shows a left view partial schematic diagram of the front side air cylinder of the present application;

[0027] Figure 3 The figure shows a cross-sectional partial schematic diagram of the front side air cylinder of the present application;

[0028] Label explanation

[0029] 1, rotating shaft;

[0030] 2, rotor core; 21, air gap; 22, ventilation hole;

[0031] 3, stator;

[0032] 4, end ring;

[0033] 5, air cylinder; 51, connecting bottom plate; 52, No. 1 turbine blade; 53, No. 2 blade; 54, stabilizing hole; DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the technical scheme of the present application more clear, the technical scheme of the present application embodiment will be described clearly and completely in the following with reference to the drawings of the present application embodiment. The same reference signs in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present application, not all. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0035] Compared with the embodiments shown in the drawings, the feasible implementation schemes within the scope of the present application can have fewer components, other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. In addition, two or more components in the drawings can be implemented in a single component, or a single component shown in the drawings can be implemented as a plurality of separate components.

[0036] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning as would be understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms do not imply any order, quantity, or importance, but are used to distinguish one element from another, and are used only to distinguish different components. Similarly, the terms "one" or "a" or "an" do not necessarily mean "one", but are used to distinguish the element from another. The terms "include" or "contain" or similar terms mean that the elements or objects before the term encompass the elements or objects listed after the term and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships can also change accordingly.

[0037] The utility model provides a novel motor rotor ventilation cooling structure for rotor wind cooling structure design process, the utility model does not make the limitation to the specific type and parameter of required improvement three phase asynchronous motor, but the structure of this rotating shaft 1, rotor iron core 2, air gap 21, ventilation hole 22, end ring 4 and air duct 5 is especially suitable for the improvement of motor rotor ventilation cooling structure.

[0038] Generally, the novel motor rotor ventilation cooling structure provided by the utility model mainly includes: rotating shaft 1, rotor iron core 2, air gap 21, ventilation hole 22, end ring 4 and air duct 5, wherein, referring to Figure 1 It shows the arrangement relationship of rotating shaft 1, rotor iron core 2, air gap 21, ventilation hole 22, end ring 4 and air duct 5.

[0039] The novel motor rotor ventilation cooling structure provided by the utility model improves the double-fan cooling air path in the background art, installs the fan in the keyway on the front and rear sides of the rotating shaft 1 in the motor, modifies to the end ring 4 on the front and rear sides of the rotor iron core 2, and redesigns the structure of the inner fan into the air duct 5. The bottom of the air duct 5 is a connecting bottom plate 51, the connecting bottom plate 51 is sleeved on the end ring 4 through bolt connection, as shown in Figure 3The connecting bottom plate 51 is annular, and a first turbine fan blade 52 is arranged in a tilted manner around the side of the connecting bottom plate 51 away from the rotating shaft 1. The first turbine fan blade 52 rotates with the rotating shaft 1 and the rotor core 2, and can suck air from the inside of the motor shell, compress and accelerate the air to the direction of the rotor core 2. Part of the airflow enters the ventilation hole 22 and the air gap 21 to complete heat exchange and dissipate heat from the rotor core 2. It should be further pointed out that a second fan blade 53 is arranged at intervals on the top of the first turbine fan blade 52. The second fan blade 53 increases a cutting area on the basis of the first turbine fan blade 52, and can cut the air inside the motor shell to improve the output air volume of the first turbine fan blade 52. Compared with the double-fan cooling air path in the prior art, the air duct 5 does not contact the rotating shaft 1, so that the air duct 5 does not need to be adjusted for balance during installation. The assembly is high in efficiency and suitable for mass production.

[0040] The rotating shaft 1 is provided with the rotor core 2 in the middle, the stator 3 is arranged outside the rotor core 2, the stator 3 is connected to the motor shell, and the air gap 21 is arranged between the stator 3 and the rotor core 2. Ventilation holes 22 are arranged at intervals on the side of the rotor core 2 close to the rotating shaft 1. The ventilation holes 22 are the first heat dissipation channels for the rotor core 2, and the air gap 21 is the second heat dissipation channel for the rotor core 2. Airflow is introduced into the two heat dissipation channels to conduct heat and cool the inside of the rotor core 2.

[0041] The end ring 4 is arranged on the front and back sides of the rotating shaft 1. The end ring 4 is connected to the stator 3 away from the rotating shaft 1 by bolt connection. The air duct 5 is connected to the side of the end ring 4 away from the rotating shaft 1 by bolt connection. The air duct 5 comprises a connecting bottom plate 51, a first turbine fan blade 52, a second fan blade 53 and a stabilizing hole 54. The connecting bottom plate 51 is connected to the side of the end ring 4 away from the rotating shaft 1 by bolt connection. The first turbine fan blade 52 and the second fan blade 53 are arranged at intervals. The first turbine fan blade 52 is arranged in a tilted manner to improve the air collection capacity. The first turbine fan blade 52 is arranged at intervals on the side of the connecting bottom plate 51 away from the rotating shaft 1. The second fan blade 53 is arranged at intervals on the top of the first turbine fan blade 52. The second fan blade 53 is arranged at intervals. The second fan blade 53 does not contact each other, so that the second fan blade 53 forms a cutting area. The second fan blade 53 is integrally arranged with the first turbine fan blade 52 in contact with the bottom. The fan blade composed of the second fan blade 53 and the first turbine fan blade 52 is higher in strength than the fan blade assembled by buckling, and is lighter in weight than the fan blade assembled by bolt connection. The stabilizing hole 54 is arranged at the top corner of the second fan blade 53. A pin is arranged in the stabilizing hole 54. The bottom of the pin is connected to the connecting bottom plate 51. The second fan blade 53 is the outermost air cutting part of the air duct 5, and needs high strength. The pin can effectively improve the structural strength of the side to prevent the second fan blade 53 from deforming.

[0042] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A novel motor rotor ventilation cooling structure, characterized by, Include: The rotating shaft (1) is centrally and externally sleeved with a rotor core (2); The stator (3) is sleeved outside the rotor core (2), and the outer side of the stator (3) is connected with the motor shell; The ventilation hole (22) is equidistantly arranged on the side of the rotor core (2) close to the rotating shaft (1); The end ring (4) is located on the front and rear sides of the rotating shaft (1), and is sleeved on the stator (3) away from the rotating shaft (1) by bolt connection; The air cylinder (5) is sleeved on the side of the end ring (4) away from the rotating shaft (1) by bolt connection.

2. The novel motor rotor ventilation cooling structure according to claim 1, characterized in that, The stator (3) and the rotor core (2) are provided with an air gap (21).

3. The novel motor rotor ventilation cooling structure according to claim 2, characterized in that, The air cylinder (5) comprises: The connecting bottom plate (51) is sleeved on the side of the end ring (4) away from the rotating shaft (1) by bolt connection; A number of first turbine blades (52) are equidistantly arranged around the side of the connecting bottom plate (51) away from the rotating shaft; A number of second blades (53) are arranged on the top of the first turbine blades (52); The stabilizing hole (54) is arranged at the top corner of the second blade (53), and the pin is arranged in the stabilizing hole (54), and the bottom of the pin is connected with the connecting bottom plate (51).

4. The novel motor rotor ventilation cooling structure according to claim 3, characterized in that, The first turbine blade (52) is arranged obliquely.

5. The novel motor rotor ventilation cooling structure according to claim 4, characterized in that, The second blade (53) is integrally arranged with the first turbine blade (52) in contact with the bottom.

6. The novel motor rotor ventilation cooling structure according to claim 5, characterized by, The second blades (53) are spaced apart from each other.

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