Bearing assembly and motor
By incorporating a grease circulation fan structure in the bearing, the problem of grease flow on the inner wall of the bearing cover is solved, thus improving the lubrication of the motor.
Patent Information
- Application Number
- CN202520138471.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In the prior art, grease in motor bearings adheres to the inner wall of the bearing cap, causing lubrication failure.
An impeller is installed in the oil flow system of the bearing, and the impeller rotates with the motor to solve the problem of oil flowability.
It achieves efficient, economical, and environmentally friendly coordinated de-liquidation of liquidity.
Smart Images
Figure CN223885037U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field, concretely relates to a bearing assembly and motor. BACKGROUND
[0002] Permanent magnet synchronous motor can variable frequency speed regulation, has low temperature rise, power density is big, starting performance is good, light load efficiency is high, small size and light weight etc. advantage, becomes the hotspot of motor research field, with the advance of national energy conservation and emission reduction policy, the high -consumption enterprise of all trades is all in energy -conserving reconstruction.
[0003] In order to reach energy -conserving index, most enterprises give priority to the reconstruction of high -power motor, since high -power motor all adopts open bearing, needs independent injection bearing grease, is used for lubrication. Through research and paper review finds, the life of motor mainly depends on the life of bearing, but the life of bearing is mainly related to bearing service environment temperature, shaft stress and grease quality, wants to guarantee motor reliability operation, improves the life of bearing, and it is the key problem of the person skilled in the art to be solved.
[0004] Since the motor bearing in the prior art has the technical problems that the grease adheres to the inner wall of the bearing gland and causes lubrication failure, the utility model discloses a bearing assembly and motor. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model wants to solve the technical problem in the prior art that the motor bearing has the defect that the grease adheres to the inner wall of the bearing gland and causes lubrication failure, so as to provide a bearing assembly and motor.
[0006] In order to solve the above problem, the utility model provides a bearing assembly, which comprises:
[0007] Motor end cover, first gland, second gland, bearing and impeller, the first gland is arranged at the axial one end of the motor end cover, the second gland is arranged at the axial other end of the motor end cover, the first gland, the motor end cover and the second gland are all located at the outer periphery of the motor rotating shaft and form a bearing chamber with the motor rotating shaft, the bearing and the impeller are both arranged in the bearing chamber, the impeller is sleeved on the outer periphery of the motor rotating shaft and can rotate integrally with the motor rotating shaft, and the impeller is located in the first space between the first gland and the bearing to block at least part of the oil from being sprayed onto the first gland.
[0008] In some embodiments,
[0009] The bearing includes a bearing inner ring and a bearing outer ring, the bearing inner ring is sleeved on the outer periphery of the motor shaft and can rotate integrally with the motor shaft, the bearing outer ring is fixed with the inner circumferential wall of the motor end cover, the bearing inner ring and the bearing outer ring have an axial passage, the axial passage is provided with rolling bodies, the impeller is opposite to the axial passage, and the impeller completely blocks the axial passage in the axial projection plane of the motor shaft, so that at least part of oil coming from the axial passage is prevented from being sprayed onto the inner wall of the first gland.
[0010] In some embodiments,
[0011] The impeller and the bearing have a gap greater than 0 in the axial direction of the motor shaft, so that the axial passage of the bearing communicates with the first space through the gap, so that lubricating oil can enter the first space through the axial passage and the gap.
[0012] In some embodiments,
[0013] The first gland is provided with a first passage, and the motor end cover is provided with a second passage, the first passage can introduce oil from the outside of the first gland, one end of the second passage communicates with the first passage, and the other end of the second passage communicates with the bearing chamber, so as to guide the oil into the bearing chamber.
[0014] In some embodiments,
[0015] The second passage extends in the axial direction of the motor shaft, and the second gland and the bearing have a second space, the bearing chamber includes the second space, and the other end of the second passage communicates with the second space, so as to guide the lubricating oil into the second space and into the axial passage of the bearing through the second space.
[0016] In some embodiments,
[0017] Further comprising an external heat dissipation pipe, one end of the external heat dissipation pipe penetrates from the lower end of the first gland to the inside of the first gland to communicate with the first space, and the other end of the external heat dissipation pipe communicates with the first passage on the first gland, so as to guide the lubricating oil in the first space into the first passage through the external heat dissipation pipe at the lower end.
[0018] In some embodiments,
[0019] The first channel is located at the upper end of the first gland, extends along the axial direction of the motor rotating shaft, and the first gland is further provided with an injection port which extends downward from the upper end of the first gland in the vertical direction to the inside of the first gland to communicate with the first channel, and the other end of the external heat dissipation pipe is connected with the injection port to communicate with the first channel through the injection port.
[0020] In some embodiments,
[0021] The oil in the external heat dissipation pipe can also be cooled by the airflow outside the first gland, and the oil in the external heat dissipation pipe can also be cooled by the airflow driven by the cooling fan of the motor.
[0022] In some embodiments,
[0023] The impeller comprises a circular ring and blades, the blades are connected to the outer peripheral wall of the circular ring and protrude outward, the circular ring is fitted on the outer peripheral wall of the motor rotating shaft, and the blades are a plurality of blades which are arranged at intervals along the circumference of the circular ring.
[0024] The utility model also provides a motor which comprises the bearing assembly.
[0025] The bearing assembly and the motor provided by the utility model have the following beneficial effects:
[0026] 1. The utility model discloses a bearing chamber inside setting impeller, and impeller and motor rotating shaft's outer periphery sleeve joint and can move with motor rotating shaft as a whole, can realize the driving of the oil in the bearing chamber inside agitating effect, improve the utilization rate of grease, simultaneously, the impeller is also located in the first space between the first gland and the bearing, can at least part of oil injection and adhere to the first gland on the blocking effect, prevent grease from adhering to the inner wall of the gland and lead to the circulating lubricating oil volume reduction and influence lubrication, solve the problem of lubrication failure caused by grease adhering to the inner wall of the bearing gland, and the utility model discloses a impeller structure (bearing grease circulation fan's structure), can drive the flow of oil, accelerate its flow, thereby can further improve the cooling effect of bearing, reduce the working temperature of bearing, improve grease quality, improve the reliability of motor.
[0027] 2. The utility model discloses still through the form that the external heat dissipation pipe is set to the outer portion of the gland, can the lubricating oil of first space bottom end in the first gland is exported after lubrication and heat dissipation, carries out effective heat dissipation again to the oil in the first channel of first gland after further being passed to the first gland, thereby completes the circulation of oil, and make the oil after cooling heat dissipation further enters the bearing chamber inside, and again to the bearing etc. Heating component is cooled and lubricated, can further improve the effect of heat dissipation and lubrication to the bearing, further improve the life of bearing, improve the reliability of motor. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 is the whole machine structure diagram of motor of the utility model;
[0029] Figure 2 is Figure 1 the local enlarged view of A part in;
[0030] Figure 3 is the structure diagram of impeller (grease circulation fan) of the utility model;
[0031] Figure 4 is the structure diagram of external heat dissipation pipe of the utility model;
[0032] Figure 5 is the curve diagram of motor life and prior art comparison of the utility model.
[0033] The figure mark is shown as:
[0034] 1, motor end cover;2, second gland;3, bearing;4, motor rotating shaft;5, first gland;6, impeller;7, bearing chamber;8, first space;9, axial passage;10, rolling element;11, first channel;12, second channel;13, second space;14, external heat dissipation pipe;15, injection inlet. DETAILED DESCRIPTION
[0035] The technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. The description of at least one exemplary embodiment is actually only illustrative, and is by no means as any limitation on the utility model and its application or use. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the scope of protection of the utility model.
[0036] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.
[0037] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments are not intended to limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportion relationship for the convenience of description. The technology, method and equipment known to those skilled in the related art can not be discussed in detail, but should be regarded as part of the authorized description under appropriate circumstances. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so further discussion is not needed in subsequent drawings once an item is defined in one drawing.
[0038] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.
[0039] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0040] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0041] like Figures 1-5 As shown, this utility model provides a bearing assembly, which includes:
[0042] The motor end cover 1, the first pressure cover 5, the second pressure cover 2, the bearing 3, and the impeller 6 are provided. The first pressure cover 5 is disposed at one axial end of the motor end cover 1, and the second pressure cover 2 is disposed at the other axial end of the motor end cover 1. The first pressure cover 5, the motor end cover 1, and the second pressure cover 2 are all located on the outer periphery of the motor shaft 4 and together with the motor shaft 4 form a bearing chamber 7. The bearing 3 and the impeller 6 are both disposed in the bearing chamber 7. The impeller 6 is sleeved on the outer periphery of the motor shaft 4 and can rotate integrally with the motor shaft 4. The impeller 6 is located in the first space 8 between the first pressure cover 5 and the bearing 3 so as to prevent at least part of the oil from being sprayed onto the first pressure cover 5.
[0043] The utility model discloses a bearing grease circulation fan structure, improves the utilization of grease, through the operation of circulation fan, pushes the bearing grease to the bearing end, fully adheres on the bearing, guarantees the lubricity of bearing, effectively reduces the injection weight of grease.
[0044] The utility model discloses a bearing grease circulation fan structure, improves the utilization of grease, through the operation of circulation fan, pushes the bearing grease to the bearing end, fully adheres on the bearing, guarantees the lubricity of bearing, effectively reduces the injection weight of grease.
[0045] The utility model discloses a bearing grease circulation fan structure, improves the utilization of grease, through the operation of circulation fan, pushes the bearing grease to the bearing end, fully adheres on the bearing, guarantees the lubricity of bearing, effectively reduces the injection weight of grease.
[0046] In some embodiments,
[0047] The bearing 3 includes a bearing inner ring and a bearing outer ring, the bearing inner ring is sleeved on the outer periphery of the motor shaft 4 and can rotate integrally with the motor shaft 4, the bearing outer ring is fixed with the inner wall of the motor end cover 1, the bearing inner ring and the bearing outer ring have an axial channel 9 therebetween, rolling bodies 10 are arranged in the axial channel 9, the impeller 6 is opposite to the axial channel 9, and the impeller 6 completely blocks the axial channel 9 in the axial projection plane of the motor shaft 4 to block at least part of oil from the axial channel 9 from spraying onto the inner wall of the first gland 5.
[0048] It is the preferred structure form of the bearing assembly of the utility model, through the structure of bearing including bearing inner and outer rings, the axial passage between the inner and outer rings can be set with the rolling body, the axial passage is the passage for lubricating oil to flow through, thereby lubricating the rolling rolling body, achieving the purpose of lubricating and heat dissipation cooling of bearing friction piece, and the impeller of the utility model completely blocks the axial passage in the axial projection plane of the motor shaft, can block the oil coming from the axial passage to the greatest extent, prevent the oil cup from spraying on the inner wall of the first gland, can further prevent the grease from adhering to the inner wall of the gland to cause the circulating lubricating oil to reduce the lubricating effect, further solve the problem of lubrication failure caused by the grease adhering to the inner wall of the bearing gland, utilize the rotating impeller to improve the lubricating effect and heat dissipation cooling effect of the bearing.
[0049] In some embodiments,
[0050] The impeller 6 and the bearing 3 have a gap greater than 0 in the axial direction of the motor shaft 4, so that the axial passage 9 of the bearing 3 communicates with the first space 8 through the gap, so that lubricating oil can enter the first space 8 through the axial passage 9 and the gap.
[0051] The utility model further has a gap greater than 0 between the impeller and the bearing in the axial direction, which can guide the oil coming from the axial passage into the first space through the gap, avoiding splashing on the inner wall of the first gland, achieving cooling and lubrication of the bearing while avoiding oil splashing on the inner wall of the first gland to prevent adhesion, and also guiding the oil entering the first space out through the external heat dissipation pipe for heat dissipation, realizing the circulation of the oil and improving the heat dissipation efficiency and lubrication efficiency of the bearing.
[0052] In some embodiments,
[0053] The first gland 5 is provided with a first channel 11, and the motor end cover 1 is provided with a second channel 12, the first channel 11 can introduce oil from the outside of the first gland 5, one end of the second channel 12 communicates with the first channel 11, and the other end of the second channel 12 communicates with the bearing chamber 7, so as to guide the oil into the bearing chamber 7.
[0054] The utility model further has a first channel provided on the first gland and a second channel provided on the motor end cover, which can introduce oil from the outside, guide the oil into the bearing chamber through the transmission of the second channel, and realize the lubrication and heat dissipation of the bearing in the bearing chamber.
[0055] In some embodiments,
[0056] The second channel 12 extends along the axial direction of the motor rotating shaft 4, and the second space 13 is between the second gland 2 and the bearing 3, the bearing chamber 7 comprises the first space 8 and the second space 13, and the other end of the second channel 12 communicates with the second space 13, so that lubricating oil can be guided into the second space 13 and then into the axial channel 9 of the bearing 3.
[0057] This is the preferred structure of the second channel and the bearing chamber of the utility model, the second channel preferably extends in the axial direction, the bearing chamber comprises a first space and a second space, and the second space is the space between the second gland and the bearing, so that the lubricating oil transmitted by the second channel is received by the second space, and the oil is guided into the axial channel of the bearing.
[0058] In some embodiments,
[0059] Further comprising an external heat dissipation pipe 14, one end of the external heat dissipation pipe 14 is upwardly arranged from the lower end of the first gland 5 to the inside of the first gland 5 to communicate with the first space 8, and the other end of the external heat dissipation pipe 14 communicates with the first channel 11 on the first gland 5, so that the lubricating oil in the first space 8 is guided into the first channel 11 through the external heat dissipation pipe 14 at the lower end.
[0060] The utility model further comprises an external heat dissipation pipe arranged outside the gland, which can guide the lubricating oil at the bottom of the first space in the first gland out after lubrication and heat dissipation, and then guide the oil into the first channel of the first gland after effective heat dissipation outside the gland, so as to complete the circulation of the oil, and further guide the oil cooled and heat-dissipated outside into the inside of the bearing chamber, and then cool and lubricate the bearing and other heat-generating components again, which can further improve the heat dissipation and lubrication effect of the bearing, further improve the service life of the bearing, and improve the reliability of the motor.
[0061] In some embodiments,
[0062] The first channel 11 is located at the upper end of the first gland 5, the first channel 11 extends along the axial direction of the motor rotating shaft 4, the first gland 5 is further provided with an injection port 15, the injection port 15 extends downward from the upper end of the first gland 5 to the inside of the first gland 5 to communicate with the first channel 11 in the vertical direction, and the other end of the external heat dissipation pipe 14 is connected with the injection port 15 to communicate with the first channel 11 through the injection port 15.
[0063] This is a further preferred structure of the bearing assembly of the utility model, the first channel and the injection port are located at the upper end of the first gland, the lubricating oil is introduced through the injection port, the oil is injected into the first channel from top to bottom, the oil is introduced into the bearing chamber through the second channel, and the oil is discharged through one end of the external heat dissipation pipe at the lower end of the first gland, and the oil is guided back to the injection port at the upper end of the first gland outside the first gland, the circulation of the oil is realized, the flowability is improved, the lubricating effect and the heat dissipation effect on the bearing are improved.
[0064] In some embodiments,
[0065] The oil in the external heat dissipation pipe 14 can also be cooled by the airflow outside the first gland 5, and the oil in the external heat dissipation pipe 14 can also be cooled by the airflow driven by the cooling fan of the motor.
[0066] The external heat dissipation pipe of the utility model is outside the first gland, can be cooled by the natural air outside, also can be cooled by the airflow driven by the cooling fan of the motor, so that the heat dissipation and cooling effect of the lubricating oil is further improved, and the heat dissipation performance and lubrication performance of the bearing are further improved.
[0067] In some embodiments,
[0068] The impeller 6 comprises a circular ring and blades, the blades are connected to the outer peripheral wall of the circular ring and protrude outward, the circular ring is fitted on the outer peripheral wall of the motor shaft 4, and the blades are a plurality of and are arranged at intervals along the circumference of the circular ring.
[0069] This is a preferred structure of the impeller of the utility model, which can rotate integrally with the motor shaft, thereby driving the lubricating oil to be introduced from the injection port, cooling and lubricating the bearing in the bearing chamber, and finally being discharged through the external heat dissipation pipe, and the lubricating oil cooled outside is further introduced into the first gland, realizing the circulation of the oil, and further improving the lubricating effect and cooling effect on the bearing.
[0070] The utility model also provides a motor which comprises the bearing assembly.
[0071] The motor of the utility model has the following beneficial effects:
[0072] 1. The grease circulation fan structure of the bearing of the utility model can solve the problem of failure caused by the adhesion of grease to the inner wall of the bearing gland.
[0073] 2. The grease circulation fan structure of the bearing of the utility model can improve the utilization rate of grease and reduce the injection amount of grease.
[0074] 3. The grease circulation fan structure of the bearing of the utility model can reduce the working temperature of the bearing, improve the quality of the grease, and improve the reliability of the motor.
[0075] The reliability of the existing high-power motor is high, and the problem is generally the bearing problem, so the maintenance of the bearing is important, and since the high-power motor adopts open bearings, it needs to inject grease for use, to ensure the lubricity of the bearing. Through research and paper review, it is found that the service life of the motor mainly depends on the service life of the bearing, but the service life of the bearing is mainly related to the bearing use environment temperature, shaft stress and grease quality; in order to ensure the reliable operation of the motor, improving the service life of the bearing is a key problem to be solved by those skilled in the art.
[0076] The traditional motor fixes the bearing in the bearing chamber of the end cover through the inner and outer pressure covers, but in order to reduce the cost and reduce the weight, the bearing pressure cover is hollowed out, so that the bearing chamber has a large space; when injecting grease, it is not known whether it is completely covered to the entire bearing, so the bearing chamber needs to be filled, which increases the amount of grease and the cost of the motor. During the operation of the motor, the bearing outer ring and the pressure cover are static, only the shaft drives the bearing inner ring to rotate, which can cause the grease to overflow into the inner and outer pressure covers, causing most of the grease to adhere to the surface of the pressure cover, losing the lubricating effect of the bearing, increasing the mechanical friction of the bearing, and greatly reducing the service life of the bearing.
[0077] The utility model provides a motor, such as Figure 1 As shown. The motor uses a new type of bearing system structure, such as Figure 2 The motor bearing system is enlarged, and the bearing system structure is composed of a motor end cover 1, a second pressure cover 2, a first pressure cover 5, a bearing 3, a motor shaft 4 and a bearing grease circulating fan (impeller 6) part; the motor bearing grease is injected into the bearing system through the upper end oil injection nozzle, and the utility model bearing grease circulating fan structure is improved, such as Figure 4 、 5 The utilization rate of the grease is improved; through the operation of the circulating fan, the bearing grease is pushed to the motor bearing, so that the bearing grease is fully attached to the bearing, the lubricity of the bearing is ensured, the injection weight of the grease is effectively reduced, and the cost of the motor is greatly reduced.
[0078] The utility model bearing grease circulating fan structure, such as Figure 2 、 3 The circulating fan structure is interference fit with the shaft and is fastened on the shaft, rotates and operates with the motor, forms a force to the motor N end, blocks the grease, prevents it from adhering to the inner wall of the bearing pressure cover, and even can adsorb the grease on the inner wall of the bearing pressure cover to the bearing end, solves the grease failure problem.
[0079] The bearing grease circulating fan in the novel bearing system structure guarantees sufficient contact of the grease and the bearing, reduces friction loss of the bearing, avoids bearing temperature rising caused by bearing friction, greatly improves the service life of the bearing, fully stirs the grease synchronously, avoids long-term local use of the grease in the traditional structure, causes quality of the grease to drop, and causes bearing lubrication failure.
[0080] The novel bearing system structure avoids two factors of high temperature and grease quality for improving the service life of the bearing, effectively improves the service life of the bearing of the motor, and further improves reliability of the motor. Figure 5 The motor life comparison chart shows that the service life of the motor is effectively improved by 8%-12%. The synchronous grease use amount is saved by 2%-5%, and the cost of the motor is reduced.
[0081] The above merely describes preferred embodiments of the novel bearing system structure, and is not used to limit the novel bearing system structure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the novel bearing system structure should be included in the protection scope of the novel bearing system structure. The above merely describes preferred embodiments of the novel bearing system structure, and it should be pointed out that, for ordinary technical personnel in the technical field, on the premise of not departing from the technical principle of the novel bearing system structure, a plurality of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the novel bearing system structure.
Claims
1. A bearing assembly characterized by: The bearing assembly comprises a motor end cover (1), a first gland (5), a second gland (2), a bearing (3) and an impeller (6), the first gland (5) is arranged at one axial end of the motor end cover (1), the second gland (2) is arranged at the other axial end of the motor end cover (1), the first gland (5), the motor end cover (1) and the second gland (2) are all located at the outer periphery of a motor rotating shaft (4) and form a bearing chamber (7) with the motor rotating shaft (4), the bearing (3) and the impeller (6) are both arranged in the bearing chamber (7), the impeller (6) is sleeved on the outer periphery of the motor rotating shaft (4) and can rotate integrally with the motor rotating shaft (4), the impeller (6) is located in a first space (8) between the first gland (5) and the bearing (3) to block at least part of oil from being sprayed onto the first gland (5).
2. The bearing assembly according to claim 1, wherein: the bearing (3) comprises a bearing inner ring and a bearing outer ring, the bearing inner ring is sleeved on the outer periphery of the motor rotating shaft (4) and can rotate integrally with the motor rotating shaft (4), the bearing outer ring is fixed with the inner circumferential wall of the motor end cover (1), the bearing inner ring and the bearing outer ring have an axial passage (9) therebetween, the axial passage (9) is provided with rolling elements (10), the impeller (6) is opposite to the axial passage (9), the impeller (6) completely blocks the axial passage (9) in the axial projection plane of the motor rotating shaft (4) to block at least part of oil from being sprayed onto the inner wall of the first gland (5) from the axial passage (9).
3. The bearing assembly according to claim 2, wherein: the impeller (6) and the bearing (3) have a gap greater than 0 in the axial direction of the motor rotating shaft (4), so that the axial passage (9) of the bearing (3) communicates with the first space (8) through the gap to enable lubricating oil to enter the first space (8) through the axial passage (9) and the gap.
4. The bearing assembly according to claim 2, wherein: the first gland (5) is provided with a first passage (11), the motor end cover (1) is provided with a second passage (12), the first passage (11) can introduce oil from the outside of the first gland (5), one end of the second passage (12) communicates with the first passage (11), the other end of the second passage (12) communicates with the bearing chamber (7) to guide oil into the bearing chamber (7).
5. The bearing assembly according to claim 4, wherein: The second channel (12) extends along the axial direction of the motor shaft (4), the second space (13) is between the second gland (2) and the bearing (3), the bearing chamber (7) comprises the second space (13), the other end of the second channel (12) communicates with the second space (13) to guide lubricating oil into the second space (13) and into the axial channel (9) of the bearing (3) through the second space (13).
6. The bearing assembly according to claim 4, characterized in that: Further comprising an external heat dissipation pipe (14), one end of the external heat dissipation pipe (14) penetrates from the lower end of the outer part of the first gland (5) to the inner part of the first gland (5) to communicate with the first space (8), the other end of the external heat dissipation pipe (14) communicates with the first channel (11) on the first gland (5) to guide the lubricating oil in the first space (8) to the first channel (11) through the external heat dissipation pipe (14) at the lower end.
7. The bearing assembly according to claim 6, characterized in that: The first channel (11) is located at the upper end of the first gland (5), the first channel (11) extends along the axial direction of the motor shaft (4), the first gland (5) is further provided with an injection port (15), the injection port (15) extends from the upper end of the outer part of the first gland (5) to the inner part of the first gland (5) in the vertical direction to communicate with the first channel (11), the other end of the external heat dissipation pipe (14) is connected to the injection port (15) to communicate with the first channel (11) through the injection port (15).
8. The bearing assembly according to claim 6, characterized in that: The oil in the external heat dissipation pipe (14) can also be cooled by air flow outside the first gland (5), and the oil in the external heat dissipation pipe (14) can also be cooled by air flow driven by a cooling fan of the motor.
9. The bearing assembly according to claim 1, characterized in that: The impeller (6) comprises a circular ring and blades, the blades are connected to the outer peripheral wall of the circular ring and protrude outward, the circular ring is fitted on the outer peripheral wall of the motor shaft (4), the blades are a plurality of, and the plurality of blades are arranged at intervals along the circumferential direction of the circular ring.
10. A motor, characterized in that: It comprises the bearing assembly according to any one of claims 1-9.