Motor

Abstract

The utility model discloses a motor, comprising a bearing bush cover which is provided with an air inducing surface; the rotor is provided with a rotating shaft, and the rotating shaft is rotatably arranged in the bearing bush cover in a penetrating manner; the air inducing baffle is fixedly connected to the rotating shaft, and the air inducing baffle and the air inducing face are oppositely arranged; wherein one of the air inducing face and the air inducing baffle is provided with an annular groove, the other one of the air inducing face and the air inducing baffle is provided with a protrusion, and the protrusion can stretch into the annular groove and rotate in the annular groove so as to disturb air flow between the air inducing baffle and the air inducing face. According to the utility model, the bulge rotates in the annular groove to generate turbulent flow and a high-pressure environment between the air inducing baffle and the air inducing surface, and the turbulent flow and the high-pressure environment in the area resist the direct pumping of negative pressure formed by a cooling fan to the bearing bush seat, so that the phenomena of oil leakage and the like of a sealing part of the bearing bush seat in the negative-pressure environment are avoided.

Description

A type of motor Technical Field

[0001] This utility model relates to the field of drive equipment technology, and in particular to an electric motor. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy and is widely used in various fields. Its components include the housing, rotor, stator, and bearing housing. The bearing housing is a crucial component of the motor, primarily used to support the rotor and reduce friction between the rotor and stator during rotation.

[0003] In some operating environments, due to the long ends of the stator windings and the outward movement of the fan shrouds at both ends of the stator, the fan used to cool the rotor is too close to the bearing housing. The negative pressure environment caused by the fan rotation can directly act on the seal of the bearing housing, resulting in oil leakage from the bearing housing.

[0004] When the motor is running and the circulating oil passes through, the foam in the circulating oil increases continuously due to the influence of the oil quality and the action of the oil slinger ring. In the entire lubrication system, the foam occupies a large amount of the operating space, which leads to an increase in the oil pressure in the oil chamber. At this time, the high negative pressure inside the motor continuously draws a vacuum into the bearing housing oil chamber, and the lubricating oil rushes out from the shaft gaps where the shaft contacts the floating oil seal and the sealing oil baffle. Affected by the internal fan of the motor, this aggravates the leakage of the motor's circulating oil. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a motor to solve the problem of oil leakage from the bearing seat caused by the negative pressure environment generated by the cooling fan in the prior art.

[0006] The technical solution adopted by this utility model to solve its technical problem is an electric motor, including:

[0007] A bearing cover, the bearing cover having an air-guiding surface;

[0008] A rotor having a shaft that is rotatably mounted on the bearing cover;

[0009] An air-guiding baffle is fixedly connected to the rotating shaft, and the air-guiding baffle is arranged opposite to the air-guiding surface;

[0010] One of the air-guiding surface and the air-guiding baffle is provided with an annular groove, and the other is provided with a protrusion. The protrusion can extend into the annular groove and rotate within the annular groove to disturb the airflow between the air-guiding baffle and the air-guiding surface.

[0011] Furthermore, the air-guiding surface is recessed on the side away from the air-guiding baffle to form the annular groove, and the protrusion is provided on the air-guiding baffle.

[0012] Furthermore, the protrusion is provided on the air-guiding surface, and the air-guiding baffle is recessed to the side away from the air-guiding surface to form the annular groove.

[0013] Furthermore, the annular groove is arranged in a circular shape.

[0014] Furthermore, the protrusion is arranged in a ring shape, or includes a number of spaced protrusions, which are arranged in a cylindrical shape or a fan-shaped ring shape.

[0015] Furthermore, a ventilation duct is formed between the air-guiding baffle and the air-guiding surface. The ventilation duct includes a first duct between the air-guiding surface and the side of the air-guiding baffle and located on the outer side of the protrusion, a second duct between the outer side of the protrusion and the outer wall of the annular groove, a third duct between the top surface of the protrusion and the bottom surface of the annular groove, a fourth duct between the inner side of the protrusion and the inner wall of the annular groove, and a fifth duct between the air-guiding surface and the side of the air-guiding baffle and located on the inner side of the protrusion.

[0016] Furthermore, the first airway, the second airway, the third airway, the fourth airway, and the fifth airway are connected in sequence, the first airway is perpendicular to the second airway, the second airway is perpendicular to the third airway, the third airway is perpendicular to the fourth airway, and the fourth airway is perpendicular to the fifth airway.

[0017] Furthermore, a plurality of bearing bushes are provided inside the bearing bush cover, and the rotating shaft is rotatably inserted through the bearing bushes; a sealing oil baffle is provided at each end of the bearing bush, the inner side of the sealing oil baffle abuts against the rotating shaft, and the outer side of the sealing oil baffle abuts against the bearing bush cover.

[0018] Furthermore, a floating sealing ring is provided between the bearing cover and the rotating shaft. The inner side of the floating sealing ring abuts against the rotating shaft, and the outer side of the floating sealing ring abuts against the bearing cover.

[0019] Furthermore, the floating sealing ring includes at least two sealing members, and a plurality of the sealing members are arranged to form an annular floating sealing ring.

[0020] The sealing members are connected by an elastic element, which provides a force that brings the two sealing members closer together.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] (1) An air-expelling baffle is fixedly installed on the rotating shaft. The air-expelling baffle is provided with an annular groove or protrusion, and a corresponding protrusion or annular groove is provided on the air-expelling surface, so that the protrusion extends into the annular groove. As the rotor rotates, the rotating shaft drives the air-expelling baffle to rotate, and at the same time drives the protrusion to rotate in the annular groove, thereby generating turbulence and high pressure environment between the air-expelling baffle and the air-expelling surface. The turbulence and high pressure environment in this area resist the direct suction of the bearing seat by the negative pressure generated by the cooling fan, and avoids the phenomenon of oil leakage at the bearing seat seal under negative pressure environment.

[0023] (2) The air baffle extends the airflow path when the negative pressure environment is being evacuated, thus avoiding direct evacuation of the bearing seat from the negative pressure environment.

[0024] (3) A first air passage, a second air passage, a third air passage, a fourth air passage, and a fifth air passage are formed between the air intake baffle and the air intake surface, which greatly prolongs the difficulty of airflow passing through the ventilation passage and avoids the negative pressure environment acting on the bearing seat. In this way, the probability of oil leakage from the bearing seat is reduced.

[0025] (4) Any two adjacent air passages are perpendicular to each other, so that when the airflow flows from the previous air passage to the next air passage, it needs to change its flow direction at a vertical angle, which can weaken the intensity of the airflow. Conversely, it can be understood that the influence of the negative pressure environment on the bearing seat needs to be weakened by multiple air passages at vertical angles, which reduces the influence of the negative pressure environment on the bearing seat and avoids oil leakage at the bearing seat seal. Attached Figure Description

[0026] Figure 1 is a cross-sectional view of the bearing cover and the air duct baffle in the embodiment;

[0027] Figure 2 is a magnified view of part A in Figure 1;

[0028] Figure 3 is a cross-sectional view of the bearing bush and the sealing oil baffle in the embodiment;

[0029] In the picture:

[0030] 100. Bearing cover; 110. Air intake surface; 120. Annular groove; 130. First air passage; 140. Second air passage; 150. Third air passage; 160. Fourth air passage; 170. Fifth air passage;

[0031] 200. Air intake baffle; 210. Protrusion;

[0032] 300. Floating seal ring;

[0033] 400. Sealed oil stop;

[0034] 500, bearing bush. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] Please refer to Figures 1-3. This utility model discloses a motor, including:

[0037] The bearing cover 100 has an air-guiding surface 110; wherein, the bearing cover 100 is the outer cover of the bearing seat;

[0038] A rotor having a shaft that is rotatably mounted on the bearing cover 100;

[0039] An air-guiding baffle 200 is fixedly connected to the rotating shaft, and the air-guiding baffle 200 is disposed opposite to the air-guiding surface 110;

[0040] One of the air-guiding surface 110 and the air-guiding baffle 200 is provided with an annular groove 120, and the other is provided with a protrusion 210. The protrusion 210 can extend into the annular groove 120 and rotate within the annular groove 120 to disturb the airflow between the air-guiding baffle 200 and the air-guiding surface 110.

[0041] First, it should be noted that in some motors, the cooling fan is close to the bearing housing. When the fan rotates, it creates negative pressure in the area near the bearing housing, which can cause the bearing housing seal to be directly drawn, leading to oil leakage and other problems.

[0042] Based on this, this application fixes an air-guiding baffle 200 on the rotating shaft. The air-guiding baffle 200 is provided with an annular groove 120 or a protrusion 210, and a corresponding protrusion 210 or an annular groove 120 is provided on the air-guiding surface 110, so that the protrusion 210 extends into the annular groove 120.

[0043] As the rotor rotates, the shaft drives the air baffle 200 to rotate, and at the same time drives the protrusion 210 to rotate within the annular groove 120. This generates turbulence and a high-pressure environment between the air baffle 200 and the air-driving surface 110. The turbulence and high-pressure environment in this area resist the direct suction of the bearing seat by the negative pressure generated by the cooling fan, thus preventing oil leakage at the bearing seat seal under negative pressure.

[0044] Furthermore, due to the addition of the air baffle 200, if the negative pressure generated by the cooling fan draws air from the bearing housing, the airflow needs to pass through the area between the air-drawing surface 110 and the air baffle 200 before exiting. It can be seen that the setting of the air baffle 200 can actually extend the airflow path when drawing air under negative pressure, thus avoiding direct airflow from the negative pressure environment to the bearing housing.

[0045] Meanwhile, the presence of a protrusion 210 extending into the annular groove 120 further extends the airflow path, making the path more meandering. This greatly reduces the negative pressure environment's force on the bearing seat, decreases the negative pressure environment's impact on the bearing seat, and prevents oil leakage at the bearing seat seal.

[0046] Furthermore, the air-guiding surface 110 is recessed to the side away from the air-guiding baffle 200 to form the annular groove 120, and the protrusion 210 is disposed on the air-guiding baffle 200.

[0047] Furthermore, the protrusion 210 is disposed on the air-guiding surface 110, and the air-guiding baffle 200 is recessed to the side away from the air-guiding surface 110 to form the annular groove 120.

[0048] In this embodiment, two implementations regarding the annular groove 120 and the protrusion 210 are provided:

[0049] In the first case, the annular groove 120 is set on the air-guiding surface 110, and then the protrusion 210 is set on the air-guiding baffle 200;

[0050] The second method involves setting an annular groove 120 on the air duct baffle 200, and then setting a protrusion 210 on the air duct surface 110.

[0051] In both of the above embodiments, the protrusion 210 extends into the annular groove 120 and rotates within the annular groove 120 as the rotor rotates, thereby disturbing the airflow to create a high-pressure environment.

[0052] Furthermore, the annular groove 120 is arranged in a circular shape.

[0053] Furthermore, the protrusion 210 is arranged in a circular shape, or includes a plurality of spaced protrusions, the protrusions being arranged in a cylindrical shape or a fan-shaped shape.

[0054] Furthermore, a ventilation duct is formed between the air-guiding baffle 200 and the air-guiding surface 110, the ventilation duct comprising:

[0055] The first air passage 130 is located between the air-guiding surface 110 and the side of the air-guiding baffle 200 and outside the protrusion 210; the second air passage 140 is located between the outer side of the protrusion 210 and the outer wall of the annular groove 120; the third air passage 150 is located between the top surface of the protrusion 210 and the bottom surface of the annular groove 120; the fourth air passage 160 is located between the inner side of the protrusion 210 and the inner wall of the annular groove 120; and the fifth air passage 170 is located between the air-guiding surface 110 and the side of the air-guiding baffle 200 and inside the protrusion 210.

[0056] Specifically, the negative pressure environment generated by the cooling fan is located on the side of the air intake baffle 200 away from the air intake surface 110. If there were no air intake baffle 200, the negative pressure environment would directly draw the bearing seat.

[0057] In this embodiment, an air-guiding baffle 200 is provided, and a first air passage 130, a second air passage 140, a third air passage 150, a fourth air passage 160, and a fifth air passage 170 are formed between the air-guiding baffle 200 and the air-guiding surface 110. This greatly increases the difficulty for airflow to pass through the ventilation passages and avoids a negative pressure environment acting on the bearing seat. This reduces the probability of oil leakage from the bearing seat.

[0058] Furthermore, the first airway 130, the second airway 140, the third airway 150, the fourth airway 160 and the fifth airway 170 are connected in sequence;

[0059] The first airway 130 is perpendicular to the second airway 140, the second airway 140 is perpendicular to the third airway 150, the third airway 150 is perpendicular to the fourth airway 160, and the fourth airway 160 is perpendicular to the fifth airway 170.

[0060] Specifically, any two adjacent airways are perpendicular to each other, so that when the airflow flows from the previous airway to the next airway, it needs to change its flow direction at a perpendicular angle, which can weaken the intensity of the airflow.

[0061] Conversely, it can also be understood that the force exerted by the negative pressure environment on the bearing housing needs to be weakened by air passages at multiple vertical angles, thus reducing the influence of the negative pressure environment on the bearing housing and preventing oil leakage at the bearing housing seal.

[0062] Furthermore, a plurality of bearing shells 500 are provided inside the bearing shell cover 100, and the rotating shaft is rotatably inserted through the bearing shells 500; a sealing oil baffle 400 is provided at each end of the bearing shell 500, the inner side of the sealing oil baffle 400 abuts against the rotating shaft, and the outer side of the sealing oil baffle 400 abuts against the bearing shell cover 100.

[0063] Specifically, sealing oil baffles 400 are installed on both sides of the bearing bush 500 to block the lubricating oil running inside the bearing bush seat at the sealing oil baffles 400, thereby reducing the lubricating oil adhering to the shaft and moving outward, and reducing the lubricating oil splashing to the floating oil seal caused by the centrifugal force of the shaft.

[0064] Furthermore, a floating sealing ring 300 is provided between the bearing cover 100 and the rotating shaft. The inner side of the floating sealing ring 300 abuts against the rotating shaft, and the outer side of the floating sealing ring 300 abuts against the bearing cover 100.

[0065] Furthermore, the floating sealing ring 300 includes at least two sealing members, and a plurality of the sealing members are arranged to form an annular floating sealing ring 300.

[0066] The sealing members are connected by an elastic element, which provides a force that brings the two sealing members closer together.

[0067] Specifically, the floating sealing ring 300 includes two semi-circular sealing members connected by an elastic element (such as a spring). The elastic force of the elastic element causes the two sealing members to come closer together to achieve a seal.

[0068] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0069] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0071] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. An electric motor, characterized in that, include: The bearing housing has an air-guiding surface; a rotor has a rotating shaft that is rotatably inserted through the bearing housing; an air-guiding baffle is fixed to the rotating shaft and is disposed opposite to the air-guiding surface; wherein, one of the air-guiding surface and the air-guiding baffle has an annular groove, and the other has a protrusion that can extend into the annular groove and rotate within the annular groove to disturb the airflow between the air-guiding baffle and the air-guiding surface.

2. The motor according to claim 1, characterized in that, The air-guiding surface is recessed on the side away from the air-guiding baffle to form the annular groove, and the protrusion is provided on the air-guiding baffle.

3. The motor according to claim 1, characterized in that, The protrusion is provided on the air-guiding surface, and the air-guiding baffle is recessed to the side away from the air-guiding surface to form the annular groove.

4. The motor according to claim 1, characterized in that, The annular groove is arranged in a circular shape.

5. The motor according to claim 1, characterized in that, The protrusions are arranged in a circular shape or include a number of spaced protrusions, which are arranged in a cylindrical shape or a fan-shaped shape.

6. The motor according to claim 1, characterized in that, A ventilation duct is formed between the air-guiding baffle and the air-guiding surface. The ventilation duct includes a first duct between the air-guiding surface and the side of the air-guiding baffle and located on the outer side of the protrusion, a second duct between the outer side of the protrusion and the outer wall of the annular groove, a third duct between the top surface of the protrusion and the bottom surface of the annular groove, a fourth duct between the inner side of the protrusion and the inner wall of the annular groove, and a fifth duct between the air-guiding surface and the side of the air-guiding baffle and located on the inner side of the protrusion.

7. The motor according to claim 6, characterized in that, The first airway, the second airway, the third airway, the fourth airway, and the fifth airway are connected in sequence. The first airway is perpendicular to the second airway, the second airway is perpendicular to the third airway, the third airway is perpendicular to the fourth airway, and the fourth airway is perpendicular to the fifth airway.

8. The motor according to claim 1, characterized in that, Several bearing bushes are also provided inside the bearing bush cover, and the rotating shaft is rotatably inserted through the bearing bushes; a sealing oil baffle is provided at each end of the bearing bush, the inner side of the sealing oil baffle abuts against the rotating shaft, and the outer side of the sealing oil baffle abuts against the bearing bush cover.

9. The motor according to claim 1, characterized in that, A floating sealing ring is also provided between the bearing cover and the rotating shaft. The inner side of the floating sealing ring abuts against the rotating shaft, and the outer side of the floating sealing ring abuts against the bearing cover.

10. The motor according to claim 9, characterized in that, The floating sealing ring includes at least two sealing members, and a plurality of the sealing members are arranged to form an annular floating sealing ring. The sealing members are connected by an elastic element, which provides a force to bring two of the sealing members closer together.

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