Vertical water-cooled three-phase asynchronous motor

Abstract

The present application discloses a vertical water-cooled three-phase asynchronous motor. The vertical water-cooled three-phase asynchronous motor includes a base assembly, a rotor assembly, an automatic greaser and a grease storage device. The base assembly includes a cylinder, an upper end cover and a lower end cover. The cylinder is surrounded by a mounting cavity, the upper end cover is arranged at the top of the cylinder, and the lower end cover is arranged at the bottom of the cylinder; the rotor assembly is installed in the mounting cavity, the rotor assembly includes a motor shaft and a rotor fixedly sleeved on the motor shaft, and the two ends of the motor shaft are respectively installed on the upper end cover and the lower end cover through bearings; the automatic greaser is arranged outside the base assembly for adding grease to the bearing; the grease storage device is installed on the motor shaft, and a conveying part is arranged on the motor shaft, and the conveying part is used to convey the grease of the inner ring of the bearing to the grease storage device. The present application can solve the problem that it is difficult to achieve maintenance-free bearings in the vertical water-cooled three-phase asynchronous motor in the prior art.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a vertical water-cooled three-phase asynchronous motor. Background Art

[0002] In nuclear power plants, drive motors are inevitably used. Due to the high radiation and high temperature environment of nuclear power plants, it is not convenient for workers to enter the nuclear power sites to maintain the drive motors. Therefore, the motors in nuclear power plants are required to have large thrust and low maintenance rate.

[0003] The existing vertical water-cooled three-phase asynchronous motors used in nuclear power plants have problems such as large axial thrust, high-speed vibration of the whole machine, maintenance-free bearings, and encoder small shaft swing. In addition, the encoder shaft transmitted by the current vertical water-cooled three-phase asynchronous motor is connected to the main shaft through threads, but after the connection, the main shaft and the encoder shaft are prone to concentricity differences, which causes the encoder to shake greatly after being installed on the encoder shaft when the motor is running, greatly reducing the encoder life. Summary of the invention

[0004] The main purpose of the present application is to provide a vertical water-cooled three-phase asynchronous motor to solve the problem that it is difficult to achieve maintenance-free bearings in the vertical water-cooled three-phase asynchronous motor in the prior art.

[0005] According to one aspect of an embodiment of the present application, there is provided a vertical water-cooled three-phase asynchronous motor, comprising:

[0006] A machine base assembly, the machine base assembly comprising a cylinder, an upper end cover and a lower end cover, the cylinder is surrounded to form a mounting cavity, the upper end cover is arranged on the top end of the cylinder, and the lower end cover is arranged on the bottom end of the cylinder;

[0007] A rotor assembly, the rotor assembly is installed in the installation cavity, the rotor assembly comprises a motor shaft and a rotor fixedly sleeved on the motor shaft, and two ends of the motor shaft are respectively installed on the upper end cover and the lower end cover through bearings;

[0008] An automatic greaser, the automatic greaser being arranged outside the base assembly for adding grease to the bearing;

[0009] A grease storage device is installed on the motor shaft. A conveying part is provided on the motor shaft, and the conveying part is used to convey the grease in the inner ring of the bearing to the grease storage device.

[0010] Further, the bearing comprises a first bearing, and the motor shaft is connected to the lower end cover through the first bearing;

[0011] The vertical water-cooled three-phase asynchronous motor includes a first bearing cover and a second bearing cover, the first bearing cover is arranged on the side of the first bearing away from the upper end cover, and the second bearing cover is arranged on the side of the first bearing close to the upper end cover. A first grease delivery channel is arranged on the lower end cover and / or the first bearing cover, and the first grease delivery channel is connected to the automatic greaser.

[0012] Further, the grease storage device comprises a first grease storage cover, which is sleeved on the motor shaft and covers a side of the second bearing cover close to the upper end cover;

[0013] The second bearing cover is sleeved on the motor shaft and is located on the side of the first bearing close to the upper end cover, and there is a clearance fit between the second bearing cover and the motor shaft. The conveying part includes a first spiral groove on the outer surface of the shaft section between the first bearing of the motor shaft and the first grease storage cover.

[0014] Further, the bearing includes a second bearing, and the motor shaft is connected to the upper end cover through the second bearing;

[0015] The vertical water-cooled three-phase asynchronous motor includes a third bearing cover and a fourth bearing cover, the third bearing cover is arranged on the side of the second bearing away from the lower end cover, and the fourth bearing cover is arranged on the side of the second bearing close to the lower end cover. The third bearing cover and / or the upper end cover are provided with a second grease delivery channel, and the second grease delivery channel is connected to the automatic greaser.

[0016] Furthermore, the grease storage device further comprises a second grease storage cover, which is sleeved on the motor shaft and covers a side of the third bearing cover away from the lower end cover;

[0017] The third bearing cover is sleeved on the motor shaft and is located on the side of the second bearing close to the lower end cover, and there is a clearance fit between the third bearing cover and the motor shaft. The conveying part includes a second spiral groove on the outer surface of the shaft section between the second bearing of the motor shaft and the second grease storage cover.

[0018] Further, the bearing includes a first bearing and a second bearing, the motor shaft is mounted on the lower end cover through the first bearing, and the motor shaft is mounted on the upper end cover through the second bearing.

[0019] Wherein, the first bearing is a deep groove bearing, and the second bearing includes at least two angular contact ball bearings arranged closely together, and at least two of the angular contact ball bearings are locked on the motor shaft through a locking mechanism.

[0020] Furthermore, the vertical water-cooled three-phase asynchronous motor also includes an encoder, and the encoder includes a connecting shaft, and the connecting shaft and the motor shaft are coaxially connected via a stop component.

[0021] Furthermore, the stop member includes a protrusion and a groove, one of the protrusion and the groove is arranged on the end surface of the motor shaft, and the other of the protrusion and the groove is arranged on the end surface of the connecting shaft.

[0022] Furthermore, a first spiral channel and a second spiral channel are arranged in the side wall of the cylinder, and the first spiral channel and the second spiral channel are both arranged in a spiral direction along the axial direction of the cylinder, and the first spiral channel and the second spiral channel are connected at the end of the cylinder to form a cooling channel, and the outlet and inlet of the cooling channel are located at the same end of the cylinder.

[0023] Furthermore, the vertical water-cooled three-phase asynchronous motor also includes a stator, and both ends of the motor shaft are sleeved with balance rings, and the cylinder and the stator are both provided with balance holes facing the balance rings.

[0024] Compared with the prior art, the technical solution of this application has at least the following technical effects:

[0025] The vertical water-cooled three-phase asynchronous motor of the present application is provided with an automatic greaser and a grease storage device, and a conveying part is correspondingly provided on the motor shaft. During the operation of the vertical water-cooled three-phase asynchronous motor, the automatic greaser can automatically add grease, and the conveying part can convey excess grease at the inner ring of the bearing to the grease storage device, thereby preventing grease accumulation at the bearing and the occurrence of overtemperature. The vertical water-cooled three-phase asynchronous motor can achieve the maintenance-free function, and is convenient for use in extreme environments such as nuclear power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 A cross-sectional view of a vertical water-cooled three-phase asynchronous motor disclosed in an embodiment of the present application;

[0028] Figure 2 A cross-sectional view of the upper end cover of the vertical water-cooled three-phase asynchronous motor disclosed in the embodiment of the present application;

[0029] Figure 3 A cross-sectional view of the lower end cover of the vertical water-cooled three-phase asynchronous motor disclosed in the embodiment of the present application;

[0030] Figure 4A cross-sectional view of a local structure of a vertical water-cooled three-phase asynchronous motor disclosed in an embodiment of the present application;

[0031] Figure 5 This is a schematic diagram of the end structure of the motor shaft disclosed in the embodiment of the present application;

[0032] Figure 6 A side view of the motor shaft disclosed in an embodiment of the present application;

[0033] Figure 7 A partial cross-sectional view of the connecting shaft disclosed in an embodiment of the present application;

[0034] Figure 8 It is a half-section view of the cylinder disclosed in the embodiment of the present application.

[0035] The above drawings include the following reference numerals:

[0036] 10. Base assembly; 11. Cylinder; 111. First spiral channel; 112. Second spiral channel; 12. Upper end cover; 13. Lower end cover; 101. Mounting cavity; 20. Rotor assembly; 21. Motor shaft; 211. First spiral groove; 212. Second spiral groove; 213. Protrusion; 22. Rotor; 40. First bearing; 50. Second bearing; 60. First bearing cover; 70. Second bearing cover; 80. First grease reservoir cover; 90. Third bearing cover; 100. Fourth bearing cover; 110. First grease delivery channel; 120. Second grease delivery channel; 130. Second grease reservoir cover; 140. Encoder; 141. Connecting shaft; 142. Groove; 150. Stator; 160. Balance ring; 170. Balance hole; 180. Junction box; 190. Screw; 200. Locking mechanism. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0040] See also Figures 1 to 3 As shown, according to an embodiment of the present application, a vertical water-cooled three-phase asynchronous motor is provided, which includes a base assembly 10, a rotor assembly 20, an automatic greaser (not shown in the figure) and a grease storage device.

[0041] Among them, the base assembly 10 includes a cylinder 11, an upper end cover 12 and a lower end cover 13. The cylinder 11 is surrounded to form an installation cavity 101. The upper end cover 12 is covered on the top of the cylinder 11, and the lower end cover 13 is covered on the bottom of the cylinder 11; the rotor assembly 20 is installed in the installation cavity 101, and the rotor assembly 20 includes a motor shaft 21 and a rotor 22 fixedly sleeved on the motor shaft 21. The two ends of the motor shaft 21 are respectively installed on the upper end cover 12 and the lower end cover 13 through bearings; the automatic greaser is arranged outside the base assembly 10 for adding grease to the bearing; the grease storage device is installed on the motor shaft 21 and is located on the side of the bearing, and a conveying part is arranged on the motor shaft 21, which is used to convey the grease of the inner ring of the bearing to the grease storage device.

[0042] It can be understood that since the three-phase asynchronous motor in this embodiment is a vertical motor, during actual installation, the cylinder 11 is vertically arranged, the top end of the cylinder 11 refers to the upper end of the vertical water-cooled three-phase asynchronous motor when it is working, and the bottom end of the cylinder 11 refers to the lower end of the vertical water-cooled three-phase asynchronous motor when it is working. After the vertical water-cooled three-phase asynchronous motor is connected to the structure to be driven, the motor shaft 21 extends in the vertical direction.

[0043] Since the vertical water-cooled three-phase asynchronous motor in the present embodiment is provided with an automatic greaser, the automatic greaser can automatically add grease to the vertical water-cooled three-phase asynchronous motor, especially to the bearings at both ends of the motor shaft 21. In this way, even if the vertical water-cooled three-phase asynchronous motor works for a long time, it is not necessary for the staff to enter the installation plant of the vertical water-cooled three-phase asynchronous motor to add grease, and the vertical water-cooled three-phase asynchronous motor can move smoothly for a long time. In addition, after the vertical water-cooled three-phase asynchronous motor works for a period of time, if the grease accumulates at the bearing position, it is easy to cause the bearing temperature to be too high, which will affect the working performance of the vertical water-cooled three-phase asynchronous motor. In the present application, a conveying part is provided on the motor shaft 21, and the grease at the bearing can be conveyed to the grease storage device through the function of the conveying part, thereby avoiding the accumulation of grease at the bearing and causing the bearing temperature to be too high, and the maintenance-free function of the vertical water-cooled three-phase asynchronous motor can be realized.

[0044] That is to say, the vertical water-cooled three-phase asynchronous motor in this embodiment is provided with an automatic greaser and a grease storage device, and a conveying part is correspondingly provided on the motor shaft 21. During the operation of the vertical water-cooled three-phase asynchronous motor, the automatic greaser can automatically add grease, and the conveying part can convey excess grease at the inner ring of the bearing to the grease storage device, thereby preventing grease accumulation at the bearing and causing excessive temperature, and realizing the maintenance-free function of the vertical water-cooled three-phase asynchronous motor, which is convenient for use in extreme environments such as nuclear power plants.

[0045] Specifically, the bearing in this embodiment includes a first bearing 40, through which the motor shaft 21 is connected to the lower end cover 13 and is located on the side of the first bearing 40 close to the upper end cover 12; and the vertical water-cooled three-phase asynchronous motor includes a first bearing cover 60 and a second bearing cover 70, the first bearing 40 cover is arranged on the side of the first bearing 40 away from the upper end cover 12, and the second bearing cover 70 cover is arranged on the side of the first bearing 40 close to the upper end cover 12. Through the action of the first bearing cover 60 and the second bearing cover 70, the first bearing 40 can be protected to prevent the external annular ring from affecting the first bearing 40. Among them, a first grease delivery channel 110 is arranged on the lower end cover 13 and / or the first bearing cover 60, and the first grease delivery channel 110 is connected to the automatic grease adder. That is to say, the first grease delivery channel 110 can be arranged on the lower end cover 13, or on the first bearing cover 60, or on the lower end cover 13 or the first bearing cover 60 at the same time. During actual operation, the first grease delivery channel 110 is connected to the automatic grease adder to facilitate the addition of grease to the first bearing 40.

[0046] The grease storage device includes a first grease storage cover 80, which is sleeved on the motor shaft 21 and covers the side of the second bearing cover 70 close to the upper end cover 12. During actual installation, the second bearing cover 70 is sleeved on the motor shaft 21, and the second bearing cover 70 and the motor shaft 21 are clearance-matched, and the conveying part includes a first spiral groove 211 arranged on the outer surface of the shaft section between the first bearing 40 of the motor shaft 21 and the first grease storage cover 80. Since the conveying part in this embodiment includes the first spiral groove 211, when the motor shaft 21 rotates, the excess lubrication at the first bearing 40 can move along the first spiral groove 211 toward the direction close to the first grease storage cover 80, and then can be stored in the first grease storage cover 80. It can be understood that in this embodiment, by making the second bearing cover 70 and the motor shaft 21 have a clearance fit, it is more suitable for the grease to flow from the gap between the second bearing cover 70 and the motor shaft 21 toward the direction of the first grease storage cover 80, the structure is simple, and it is more suitable for the grease to flow.

[0047] Furthermore, the bearing in this embodiment includes a second bearing 50. During actual installation, the motor shaft 21 is connected to the upper end cover 12 through the second bearing 50 and is located on the side of the second bearing 50 close to the lower end cover 13; and the vertical water-cooled three-phase asynchronous motor includes a third bearing cover 90 and a fourth bearing cover 100. The third bearing cover 90 is provided on the side of the second bearing 50 away from the lower end cover 13, and the fourth bearing cover 100 is provided on the side of the second bearing 50 close to the lower end cover 13. Through the action of the third bearing cover 90 and the fourth bearing cover 100, the second bearing 50 can be protected to prevent the external environment from causing adverse effects on the second bearing 50. Among them, a second grease delivery channel 120 is provided on the third bearing cover 90 and / or the upper end cover 12, and the second grease delivery channel 120 is connected to the automatic greaser. That is to say, the second grease delivery channel 120 can be set on the third bearing cover 90, or on the upper end cover 12, or on both the third bearing cover 90 and the upper end cover 12. During actual operation, the second grease delivery channel 120 is connected to the automatic greaser to facilitate the addition of grease to the second bearing 50.

[0048] Furthermore, the grease storage device in this embodiment further includes a second grease storage cover 130, which is sleeved on the motor shaft 21 and covers the side of the third bearing cover 90 away from the lower end cover 13. The third bearing cover 90 is sleeved on the motor shaft 21, and the third bearing cover 90 and the motor shaft 21 are clearance-matched, and the conveying portion further includes a second spiral groove 212 arranged on the outer surface of the shaft section between the second bearing 50 of the motor shaft 21 and the second grease storage cover 130. When the motor shaft 21 rotates, the excess lubrication at the second bearing 50 can move along the second spiral groove 212 toward the direction close to the second grease storage cover 130, and can be stored in the first grease storage cover 80. It can be understood that in this embodiment, by making the third bearing cover 90 and the motor shaft 21 have clearance fit, it is more suitable for the grease to flow from the gap between the third bearing cover 90 and the motor shaft 21 toward the second grease storage cover 130, and the structure is simple, which is more suitable for the grease to flow.

[0049] Optionally, the first bearing 40 in this embodiment is a deep groove bearing, and the second bearing 50 includes at least two angular contact ball bearings arranged closely together, and the at least two angular contact ball bearings are locked on the motor shaft 21 through the locking mechanism 200. Through the action of the deep groove bearing and the angular contact ball bearing, the vertical water-cooled three-phase asynchronous motor can be used in a large thrust condition, and the structure is stable and reliable. In order to lock the at least two angular contact bearings together, the locking mechanism 200 in this embodiment is set as a locking ring and a locking pad. During actual processing, a stop step is set on the motor shaft 21, and the at least two angular contact bearings are sequentially sleeved on the motor shaft 21, wherein one end of an angular contact bearing is against the stop step of the motor shaft 21, and the locking pad and the locking ring are sequentially sleeved on the motor shaft 21, which can stably lock the multiple angular contact bearings on the motor shaft 21, and the structure is simple, stable and reliable.

[0050] Of course, in other embodiments of the present application, the first bearing 40 and the second bearing 50 may both be angular contact bearings. As long as they are other deformation methods based on the concept of the present application, they are within the protection scope of the present application.

[0051] Combination Figures 1 to 4 As shown, in the actual working process, in order to ensure the balance of the vertical water-cooled three-phase asynchronous motor during movement, it is usually necessary to add a balancing block to the rotor assembly 20. However, after the vertical water-cooled three-phase asynchronous motor is assembled, in the subsequent operation process, the vertical water-cooled three-phase asynchronous motor may also be difficult to achieve dynamic balance of the whole machine. In order to adjust the balance state of the vertical water-cooled three-phase asynchronous motor, the structure of the vertical water-cooled three-phase asynchronous motor is innovated in this embodiment, and a motor that can reduce the vibration index of the vertical water-cooled three-phase asynchronous motor is designed.

[0052] Specifically, the vertical water-cooled three-phase asynchronous motor in this embodiment also includes a stator 150. When actually installed, a balance ring 160 is sleeved on both ends of the motor shaft 21, and a balance hole 170 is provided on the cylinder 11 and the stator 150, which is directly opposite to the balance ring 160. In this way, the cylinder 11, the stator 150, and the balance ring 160 are in a line. After the vertical water-cooled three-phase asynchronous motor is assembled, when the vertical water-cooled three-phase asynchronous motor fails in dynamic balance, the balance hole 170 can be used to directly install the balance block on the balance ring 160 outside the motor, thereby reducing the vibration index of the motor.

[0053] Optionally, a plurality of threaded holes are provided on the balancing ring 160 in this embodiment, and the plurality of threaded holes are arranged at intervals along the outer circumference of the balancing ring 160. In this way, the balancing block can be installed at different positions of the balancing ring 160, and the balancing block can be selectively installed according to the dynamic balancing requirements of the vertical water-cooled three-phase asynchronous motor.

[0054] Optionally, the balancing hole 170 in this embodiment can be set to one or more. When the balancing hole 170 is set to more than one, the multiple balancing holes 170 are spaced apart along the outer circumference of the balancing ring 160 to facilitate the installation of the balancing block.

[0055] In order to ensure the sealing of the installation cavity 101, the vertical water-cooled three-phase asynchronous motor in this embodiment is further provided with a sealing screw 190, which is detachably installed in the balancing hole 170 on the cylinder 11. When the balancing block needs to be installed, the sealing screw 190 can be removed from the cylinder 11. After the balancing block is installed, the sealing screw 190 can be installed in the balancing hole 170 on the cylinder 11.

[0056] Furthermore, the vertical water-cooled three-phase asynchronous motor in this embodiment is provided with a junction box 180 , through which the wires and the like of the vertical water-cooled three-phase asynchronous motor can be easily connected.

[0057] Combination Figures 5 to 7 As shown, the vertical water-cooled three-phase asynchronous motor in this embodiment also includes an encoder 140, and the encoder 140 includes a connecting shaft 141. The connecting shaft 141 and the motor shaft 21 are coaxially connected through a stop component. In this way, the connecting shaft 141 of the encoder 140 can form a whole with the motor shaft 21, avoiding vibration of the connecting shaft 141 during operation, thereby increasing the service life of the encoder 140.

[0058] Optionally, the stopper component includes a protrusion 213 and a groove 142, one of which is arranged on the end face of the motor shaft 21, and the other is arranged on the end face of the connecting shaft 141. That is to say, when the protrusion 213 is arranged on the motor shaft 21, the groove 142 is arranged on the connecting shaft 141; when the protrusion 213 is arranged on the connecting shaft 141, the groove 142 is arranged on the motor shaft 21. During actual installation, the protrusion 213 and the groove 142 are matched, and then the connecting shaft 141 and the motor shaft 21 are locked by bolts, which can ensure the coaxiality of the encoder 140 and the motor shaft 21, thereby avoiding the vibration of the encoder 140 during operation, thereby increasing the service life of the encoder, and the structure is simple and easy to implement. Through verification and testing, it is determined that the above structure can be applied to low-voltage, high-speed, vertical, large-thrust, maintenance-free, water-cooled three-phase asynchronous motors.

[0059] Combination Figures 1 to 8 As shown, the side wall of the cylinder 11 in this embodiment is provided with a first spiral channel 111 and a second spiral channel 112, both of which are arranged spirally along the axial direction of the cylinder 11, and the first spiral channel 111 and the second spiral channel 112 are connected at the end of the cylinder 11 to form a cooling channel, and the outlet and the inlet of the cooling channel are located at the same end of the cylinder 11. With such an arrangement, when the coolant is introduced into the cooling channel, the coolant can counteract the impact of the cooling water on the base assembly 10 during operation, thereby making the overall operation of the vertical water-cooled three-phase asynchronous motor more stable.

[0060] The vertical water-cooled three-phase asynchronous motor of the present application is suitable for areas with large axial thrust, low vibration, high temperature, high radiation and other areas that cannot be entered by personnel. Compared with conventional vertical motors, it has the advantages of strong load-bearing capacity, low operating vibration and maintenance-free bearings.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0062] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0063] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vertical water-cooled three-phase asynchronous motor, characterized in that: include: A machine base assembly (10), the machine base assembly (10) comprising a cylinder (11), an upper end cover (12) and a lower end cover (13), the cylinder (11) is surrounded to form a mounting cavity (101), the upper end cover (12) is disposed on the top end of the cylinder (11), and the lower end cover (13) is disposed on the bottom end of the cylinder (11); A rotor assembly (20), the rotor assembly (20) being mounted in the mounting cavity (101), the rotor assembly (20) comprising a motor shaft (21) and a rotor (22) fixedly sleeved on the motor shaft (21), and two ends of the motor shaft (21) being respectively mounted on the upper end cover (12) and the lower end cover (13) via bearings; An automatic greaser, the automatic greaser being arranged outside the base assembly (10) and used for adding grease to the bearing; A grease storage device, the grease storage device is mounted on the motor shaft (21), and a conveying portion is provided on the motor shaft (21), the conveying portion is used to convey the grease on the inner ring of the bearing to the grease storage device; The bearing comprises a first bearing (40), and the motor shaft (21) is connected to the lower end cover (13) via the first bearing (40); The vertical water-cooled three-phase asynchronous motor comprises a first bearing cover (60) and a second bearing cover (70), wherein the first bearing cover (60) is arranged on a side of the first bearing (40) away from the upper end cover (12), and the second bearing cover (70) is arranged on a side of the first bearing (40) close to the upper end cover (12), and a first grease delivery channel (110) is arranged on the lower end cover (13) and / or the first bearing cover (60), and the first grease delivery channel (110) is connected to the automatic greaser; The grease storage device comprises a first grease storage cover (80), wherein the first grease storage cover (80) is sleeved on the motor shaft (21) and covers a side of the second bearing cover (70) close to the upper end cover (12); The second bearing cover (70) is sleeved on the motor shaft (21) and is located on a side of the first bearing (40) close to the upper end cover (12), and there is a clearance fit between the second bearing cover (70) and the motor shaft (21), and the conveying portion comprises a first spiral groove (211) arranged on the outer surface of the shaft section between the first bearing (40) of the motor shaft (21) and the first grease storage cover (80).

2. The vertical water-cooled three-phase asynchronous motor according to claim 1, characterized in that: The bearing comprises a second bearing (50), and the motor shaft (21) is connected to the upper end cover (12) via the second bearing (50); The vertical water-cooled three-phase asynchronous motor comprises a third bearing cover (90) and a fourth bearing cover (100), wherein the third bearing cover (90) is arranged on a side of the second bearing (50) away from the lower end cover (13), and the fourth bearing cover (100) is arranged on a side of the second bearing (50) close to the lower end cover (13), and a second grease delivery channel (120) is arranged on the third bearing cover (90) and / or the upper end cover (12), and the second grease delivery channel (120) is connected to the automatic grease adder.

3. The vertical water-cooled three-phase asynchronous motor according to claim 2, characterized in that: The grease storage device further comprises a second grease storage cover (130), wherein the second grease storage cover (130) is sleeved on the motor shaft (21) and covers a side of the third bearing cover (90) away from the lower end cover (13); The third bearing cover (90) is sleeved on the motor shaft (21) and is located on a side of the second bearing (50) close to the lower end cover (13), and there is a clearance fit between the third bearing cover (90) and the motor shaft (21), and the conveying portion includes a second spiral groove (212) arranged on the outer surface of the shaft section between the second bearing (50) of the motor shaft (21) and the second grease storage cover (130).

4. The vertical water-cooled three-phase asynchronous motor according to claim 1, characterized in that: The bearing comprises a first bearing (40) and a second bearing (50), the motor shaft (21) is mounted on the lower end cover (13) via the first bearing (40), and the motor shaft (21) is mounted on the upper end cover (12) via the second bearing (50). The first bearing (40) is a deep groove bearing, and the second bearing (50) includes at least two angular contact ball bearings arranged closely together, and at least two of the angular contact ball bearings are locked on the motor shaft (21) through a locking mechanism (200).

5. The vertical water-cooled three-phase asynchronous motor according to claim 1, characterized in that: The vertical water-cooled three-phase asynchronous motor also includes an encoder (140), and the encoder (140) includes a connecting shaft (141). The connecting shaft (141) and the motor shaft (21) are coaxially connected via a stop component.

6. The vertical water-cooled three-phase asynchronous motor according to claim 5, characterized in that: The stopper component comprises a protrusion (213) and a groove (142), wherein one of the protrusion (213) and the groove (142) is arranged on the end surface of the motor shaft (21), and the other is arranged on the end surface of the connecting shaft (141).

7. The vertical water-cooled three-phase asynchronous motor according to claim 1, characterized in that: A first spiral channel (111) and a second spiral channel (112) are arranged in the side wall of the cylinder (11); the first spiral channel (111) and the second spiral channel (112) are both arranged in a spiral manner along the axial direction of the cylinder (11); the first spiral channel (111) and the second spiral channel (112) are connected at the end of the cylinder (11) to form a cooling channel; the outlet and the inlet of the cooling channel are located at the same end of the cylinder (11).

8. The vertical water-cooled three-phase asynchronous motor according to any one of claims 1 to 7, characterized in that: The vertical water-cooled three-phase asynchronous motor also includes a stator (150), and both ends of the motor shaft (21) are sleeved with balance rings (160), and the barrel (11) and the stator (150) are both provided with balance holes (170) facing the balance rings (160).

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