CN114123663A - Current isolating device and method for permanent magnet synchronous semi-direct-drive variable frequency speed regulation motor shaft - Google Patents
Current isolating device and method for permanent magnet synchronous semi-direct-drive variable frequency speed regulation motor shaft Download PDFInfo
- Publication number
- CN114123663A CN114123663A CN202111499367.9A CN202111499367A CN114123663A CN 114123663 A CN114123663 A CN 114123663A CN 202111499367 A CN202111499367 A CN 202111499367A CN 114123663 A CN114123663 A CN 114123663A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- magnet synchronous
- direct
- frequency speed
- drive variable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title description 10
- 230000009467 reduction Effects 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract 7
- 238000000926 separation method Methods 0.000 claims abstract 6
- 239000003921 oil Substances 0.000 claims description 12
- 239000010687 lubricating oil Substances 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 230000005672 electromagnetic field Effects 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000001996 bearing alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a current isolating device for a permanent magnet synchronous semi-direct-drive variable frequency speed regulating motor shaft, which comprises a shell, a rotor and a stator, wherein the shell is rotationally connected with a rotating shaft, the rotor is fixedly connected to one end of the rotating shaft, one end of the rotating shaft is provided with a spline tooth type coupler, and one side of the spline tooth type coupler is in transmission connection with a planetary gear train; the spline tooth type coupler comprises a driving spline sleeve and a driven spline sleeve, the driving spline sleeve and the driven spline sleeve are fixedly connected through screws, and the planetary reduction gear is mutually matched with a spline of the motor output end shaft through a spigot inner gear ring of the machine shell and the spline tooth type coupler to form a whole power transmission system; the invention also provides a separation method for the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft current separation device, which can block a conduction loop of shaft current, thoroughly solve the problem of motor fault caused by the shaft current burning a planetary speed reducer and prolong the service life of the motor.
Description
Technical Field
The invention relates to the technical field of permanent magnet synchronous semi-direct-drive variable frequency speed motors, in particular to a current partition device for a permanent magnet synchronous semi-direct-drive variable frequency speed motor shaft, and further relates to a partition method for the current partition device for the permanent magnet synchronous semi-direct-drive variable frequency speed motor shaft.
Background
According to the structure and the working principle of the synchronous motor, the motor has unbalanced magnetic resistance in a magnetic circuit due to the overlapping factors of the sector punching sheets, the silicon steel sheets and the like and the existence of the iron core grooves, the ventilation holes and the like, alternating magnetic flux is arranged around the rotating shaft to cut the rotating shaft, and shaft voltage is induced at two ends of the shaft. The main shaft of the unit inevitably rotates in an incompletely symmetrical magnetic field, such as a stator core combination seam, a stator silicon steel sheet seam, uneven air gap between a stator and a rotor, inconsistent shaft center and magnetic field center, and the like. Thus, an alternating current is generated across the shaft, which is referred to as the shaft current.
Under normal conditions, a lubricating oil film exists between the rotating shaft and the bearing, and the insulating effect is achieved. For lower shaft voltage, the lubricating oil film can still protect the insulating property and cannot generate shaft current. However, when the shaft voltage increases to a certain value, particularly when the motor is started, the lubricating oil film in the bearing is not formed stably, the shaft voltage breaks through the oil film to discharge, a loop is formed, the shaft current passes through the metal contact points of the bearing and the rotating shaft, the metal contact points are small, the current density of the points is high, high temperature is generated in the moment, the bearing is locally fused, the fused bearing alloy splashes under the action of rolling force, and small pits are burnt on the inner surface of the bearing.
Because most motors adopt a frequency converter to control the rotating speed and the direction of the motor, the starting of the frequency converter is easy to generate shaft current. When the shaft current is large, when the current flows through the planetary speed reducer, the problems of gear pitting, polluted lubricating oil, abnormal temperature and the like continuously occur, so that the problems can be caused, the transmission efficiency is reduced, and the service life is shortened. The main approach to solving the current damage of the shaft in the past is to mount a brush on the rotating shaft or use an insulating bearing. The electric brush is arranged on the rotating shaft, so that the electric brush is frequently replaced, and poor contact is easily caused after the electric brush is abraded to a certain degree; the adoption of the insulating bearing not only has high cost, but also has long production period.
In order to solve the problem in the prior art and reduce the harm of the shaft current to the motor and the planetary reduction gear, a device capable of cutting off the transmission of the shaft current is needed to ensure the safe and normal operation of the motor.
Disclosure of Invention
The invention aims to provide a device and a method for cutting off current of a permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft, which can block a conduction loop of shaft current, thoroughly solve the problem of motor fault caused by the shaft current burning a planetary speed reducer, prolong the service life of a motor and solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the current isolating device for the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft comprises a shell, a rotor and a stator, wherein a rotating shaft is rotationally connected in the shell, the rotor is fixedly connected to one end of the rotating shaft, the stator is connected to the outer ring of the rotor through electromagnetic field transmission and is fixedly connected with the inner wall of the shell, a spline tooth type coupler is arranged at one end of the rotating shaft, and a planetary gear train is in transmission connection with one side of the spline tooth type coupler;
the spline tooth type coupler comprises a driving spline sleeve and a driven spline sleeve, the driving spline sleeve and the driven spline sleeve are fixedly connected through a screw, an insulating sleeve is arranged at the position where the screw penetrates through the driving spline sleeve and the driven spline sleeve, an insulating pad is fixedly arranged between the driving spline sleeve and the driven spline sleeve, and one end of a rotating shaft is in meshing transmission in the driving spline sleeve.
A rib plate is arranged in the machine shell, a through hole is formed in the rib plate, and a first bearing is fixedly arranged between the through hole and the rotating shaft.
The planetary gear train comprises a sun gear, a planet gear, an inner gear ring and a planet carrier, the planet gear is meshed and rotatably installed in the inner gear ring, and the sun gear is meshed and driven in the driven spline sleeve.
And one side of the inner gear ring is matched and positioned with the seam allowance.
And one side of the planet carrier is provided with a second bearing, and the inner gear ring is rotationally connected with the planet carrier through the second bearing.
The planetary gear train is of a low-speed large-torque structure, the number of single-stage planetary gears is three or four, the planetary gear train is lubricated by oil immersion, and the height of a gear immersed in lubricating oil is one to two times of the tooth top height.
The first bearing is preferably a self-aligning roller bearing and is a double-row roller, the outer ring is provided with 1 common spherical raceway, the inner ring is provided with 2 raceways, and the raceways incline to form an angle relative to the bearing axis; the second bearing is preferably a deep groove ball bearing.
The partition method for the permanent magnet synchronous semi-direct-drive variable frequency speed regulation motor shaft current partition device comprises the following steps:
s1, assembling the stator and the rotor in place, and ensuring the end faces of the stator and the rotor to be aligned;
s2, cleaning the parts before installation, wherein the parts after cleaning need to be wiped dry by cleaning solution remained on the surfaces of the parts;
s3, sequentially mounting a driving spline sleeve, an insulating pad, a driven spline sleeve, an insulating plain washer and a spring pad at the shaft extension end of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor, screwing the driving spline sleeve, the insulating pad, the driven spline sleeve, the insulating plain washer and the spring pad by using an inner hexagonal socket head screw, and completing one-step clamping, wherein the coaxiality precision reaches the drawing requirement, and the assembly reference is consistent with the processing reference requirement;
s4, the shell is vertically placed on the workbench, the planetary reduction gear is hoisted to the position above the shell and slowly descends, after the screw enters the aperture of the shell, the planetary reduction gear can quickly descend, and the planetary reduction gear is ensured to be aligned with the end face of the shell;
s5, mounting the front end cover, smearing sealant on the joint surface, and assembling the vent valve in place. Installing a cooling fan, a cooling fan cover and the like, and filling lubricating oil;
and S6, after the assembly is completed, rotating the test bed to perform an idle running experiment, and detecting the current partition effect of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft.
The permanent magnet synchronous semi-direct-drive variable-frequency speed motor is a large and medium permanent magnet synchronous semi-direct-drive variable-frequency speed motor, the motor is a 16-pole to 20-pole variable-frequency high-low voltage power supply.
In summary, due to the adoption of the technology, the invention has the beneficial effects that:
in the invention, the motor is used as a power input end, the planetary reduction gear is used as a power output end, and the planetary reduction gear is mutually matched with the spline of the motor output end shaft through the spigot inner gear ring and the spline tooth type coupling of the shell to form a whole power transmission system, so that the structure is simple and the installation is convenient;
the invention discloses a spline tooth type coupler serving as an intermediate transmission device, which mainly comprises a driving spline sleeve, an insulating pad, an insulating sleeve, an insulating flat washer, a spring pad, an inner hexagonal socket head screw and a driven spline sleeve. An insulating pad is arranged between the driving spline housing and the driven spline housing; and an insulating sleeve and an insulating flat washer are arranged between the driven spline sleeve and the inner hexagonal socket head cap screw. The insulating pad, the insulating sleeve and the insulating flat washer are made of high-strength insulating materials, so that shaft current can be effectively isolated, a conduction loop of the shaft current is blocked, the problem that the shaft current burns the planetary reduction gear to cause motor faults can be thoroughly solved, and the service life of the motor is prolonged.
Drawings
FIG. 1 is a schematic view of a partial front-view direction-of-view three-dimensional structure of a current isolating device of a permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft according to the present invention;
FIG. 2 is a schematic view of a partial side-view, direction-of-sight three-dimensional structure of the current isolating device for the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft of the present invention;
FIG. 3 is a schematic view of a partial front sectional view of the current isolating device of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft according to the present invention;
FIG. 4 is a schematic front sectional view of a spline tooth type coupling for a permanent magnet synchronous semi-direct drive variable frequency speed control motor shaft current isolating device according to the present invention;
fig. 5 is an enlarged schematic view of a portion a in fig. 4 according to the present invention.
In the figure: 1. a stator; 2. a rotor; 3. a second bearing; 4. a rotating shaft; 5. a spline tooth coupling; 501. a driving spline housing; 502. an insulating pad; 503. an insulating sleeve; 504. an insulating flat washer; 505. a spring pad; 506. a screw; 507. a driven spline housing; 6. a housing; 601. a rib plate; 602. a first bearing; 603. a cavity; 604. stopping the opening; 7. a sun gear; 8. a planet wheel; 9. an inner gear ring; 10. a planet carrier; 11. gear oil; 12. a rotary shaft lip-shaped sealing ring; 13. a planetary gear train.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The invention provides a current isolating device for a permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft as shown in figures 1-5, which comprises a machine shell 6, a rotor 2 and a stator 1, wherein a rotating shaft 4 is rotationally connected in the machine shell 6, the rotor 2 is fixedly connected to one end of the rotating shaft 4, the stator 1 is connected to the outer ring of the rotor 2 through electromagnetic field transmission, the stator 1 is fixedly connected with the inner wall of the machine shell 6, an air gap is arranged between the stator 1 and the rotor 2 and provides driving force through the electromagnetic field, a spline tooth type coupler 5 is arranged at one end of the rotating shaft 4, and a planetary gear train 13 is in transmission connection with one side of the spline tooth type coupler 5;
the spline gear coupling 5 is used as an intermediate transmission device, so that shaft current can be effectively isolated, the planetary reduction gear is prevented from being electrically corroded, and the service life of the motor is prolonged; the spline tooth type coupler 5 comprises a driving spline housing 501 and a driven spline housing 507, the driving spline housing 501 and the driven spline housing 507 are fixedly connected through a screw 506, an insulating sleeve 503 is arranged at the penetrating position of the screw 506, an insulating pad 502 is fixedly arranged between the driving spline housing 501 and the driven spline housing 507, one end of a rotating shaft 4 is meshed and driven in the driving spline housing 501, the spline tooth type coupler 5 is internally provided with the spline tooth type coupler 5, and the spline tooth type coupler is semi-direct-driven, small in occupied space, easy to install and free of maintenance; the driving spline housing 501 of the spline tooth type coupling 5 is connected with the spline of the motor output end shaft in a matching way, the driven spline housing 507 is meshed with the sun gear 7, and the transmission speed ratio is large. The involute spline is adopted, so that the strength is high, the toughness is good, the structure is compact, the bearing capacity is strong, the automatic positioning is easy, the mounting precision is high, and the increase of the rigidity of the whole structure is facilitated.
A rib plate 601 is arranged in the machine shell 6, a through hole is formed in the rib plate 601, a first bearing 602 is fixedly arranged between the through hole and the rotating shaft 4, the first bearing 602 is preferably a self-aligning roller bearing and is a double-row roller, 1 common spherical raceway is arranged on an outer ring, 2 raceways are arranged on an inner ring, and the inner ring inclines to form an angle relative to a bearing axis; the self-aligning roller bearing has the self-aligning performance, so that the self-aligning roller bearing is not easily influenced by the angle between the motor output end shaft and the spline tooth type coupling 5 to the error or the shaft bending, and can bear the axial load with the bidirectional action besides the radial load.
The planetary gear train 13 comprises a sun gear 7, a planet gear 8, an inner gear ring 9 and a planet carrier 10, wherein the planet gear 8 is meshed and rotatably installed inside the inner gear ring 9, the sun gear 7 is meshed and driven in a driven spline housing 507, a second bearing 3 is arranged on one side of the planet carrier 10, and the second bearing 3 is preferably a deep groove ball bearing. The inner gear ring 9 is rotatably connected with the planet carrier 10 through the second bearing 3, a cavity 603 is arranged on one side, far away from the rotor 2, in the machine shell 6, a spigot 604 is arranged on one side of the cavity 603, and one side of the inner gear ring 9 is matched and positioned with the spigot 604.
The planetary gear train 13 is of a low-speed and large-torque structure, wherein the number of single-stage planetary gears is three or four, even the planetary gear train can be driven by multi-stage planetary gears, and the planetary gear train has the characteristics of power splitting and multi-tooth meshing; the planetary gear train 13 is lubricated by oil immersion, and the height of the gear immersed in the lubricating oil is one to two times of the tooth crest height.
The partition method for the permanent magnet synchronous semi-direct-drive variable frequency speed regulation motor shaft current partition device comprises the following steps:
s1, assembling the stator 1 and the rotor 2 in place, and ensuring the end faces of the stator 1 and the rotor 2 to be aligned;
s2, cleaning the parts before installation, wherein the parts after cleaning need to be wiped dry by cleaning solution remained on the surfaces of the parts;
s3, sequentially mounting a driving spline housing 501, an insulating pad 502, a driven spline housing 507, an insulating housing 503, an insulating flat washer 504 and a spring washer 505 at the shaft extension end of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor, screwing the driving spline housing, the insulating pad 502, the driven spline housing 507, the insulating housing 503, the insulating flat washer 504 and the spring washer 505 by using an inner hexagonal socket head cap screw, completing one-time clamping, wherein the coaxiality precision reaches the drawing requirement, and the assembly reference is consistent with the processing reference requirement;
s4, the shell 6 is vertically placed on the workbench, the planetary reduction gear is hoisted to the position above the shell 6 and slowly descends, after the screw enters the aperture of the shell 6, the planetary reduction gear can quickly fall down, and the planetary reduction gear is ensured to be aligned with the end face of the shell 6;
s5, mounting the front end cover, smearing sealant on the joint surface, and assembling the vent valve in place. Installing a cooling fan, a cooling fan cover and the like, and filling lubricating oil;
and S6, after the assembly is completed, rotating the test bed to perform an idle running experiment, and detecting the current partition effect of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft.
The permanent magnet synchronous semi-direct-drive variable-frequency speed control motor is a large and medium permanent magnet synchronous semi-direct-drive variable-frequency speed control motor, is a 16-pole to 20-pole variable-frequency high-low voltage power supply.
Example 2
One side of the rib plate 601, which is connected with the rotating shaft 4 through a bearing, is provided with a rotating shaft lip-shaped sealing ring 12, an oil seal inner hub coated with a layer of wavy rubber is designed between the rotating shaft 4 and the rotating shaft lip-shaped sealing ring 12, when the oil seal device works, the inner hub rotates along with the shaft, and the oil seal realizes dynamic sealing between the lip of the oil seal and the outer surface of the inner hub. Because the novel oil seal arranges an oil seal inner hub with buffer property between the oil seal main lip and the rotating shaft, the oil seal main lip is not directly contacted with the shaft, thereby effectively reducing the interference of external adverse factors such as eccentricity, rough surface, poor shaft roundness and the like of the shaft to sealing, simultaneously also making the installation become easy, improving the sealing effect and prolonging the service life.
The insulating pad 502, the insulating sleeve 503 and the insulating flat washer 504 are made of high-strength insulating materials, have good chemical stability, acid and alkali resistance, moisture resistance, high temperature resistance and bonding performance, can avoid moisture absorption failure, or abnormal conditions such as reduction of insulation resistance caused by scrap iron entering an insulating gap after assembly, have good insulating performance and stable insulating performance, and have good adaptability by taking the high-strength insulating materials as the insulating materials. Therefore, the shaft current can be effectively cut off, the electric corrosion of the planetary reduction gear is prevented, and the service life of the motor is prolonged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (9)
1. A be used for synchronous half direct drive variable frequency speed control motor shaft current off device of permanent magnetism, including casing (6), rotor (2) and stator (1), casing (6) internal rotation is connected with pivot (4), rotor (2) fixed connection is in the one end of pivot (4), stator (1) is connected in rotor (2) outer lane through electromagnetic field transmission, just stator (1) and casing (6) inner wall fixed connection, its characterized in that: one end of the rotating shaft (4) is provided with a spline tooth type coupler (5), and one side of the spline tooth type coupler (5) is in transmission connection with a planetary gear train (13);
spline tooth-like shaft coupling (5) are including initiative spline housing (501) and driven spline housing (507), initiative spline housing (501) and driven spline housing (507) are through screw (506) fixed connection, screw (506) run through the position and are provided with insulating cover (503), fixed mounting has insulating pad (502) between initiative spline housing (501) and driven spline housing (507), pivot (4) one end meshing transmission is in initiative spline housing (501).
2. The current isolating device for the permanent magnet synchronous half direct-drive variable frequency speed regulating motor shaft according to claim 1, is characterized in that: a rib plate (601) is arranged in the machine shell (6), a through hole is formed in the rib plate (601), and a first bearing (602) is fixedly arranged between the through hole and the rotating shaft (4).
3. The current isolating device for the permanent magnet synchronous half direct-drive variable frequency speed regulating motor shaft according to claim 1, is characterized in that: the planetary gear train (13) comprises a sun gear (7), a planetary gear (8), an inner gear ring (9) and a planet carrier (10), the planetary gear (8) is meshed and rotatably installed inside the inner gear ring (9), and the sun gear (7) is meshed and driven in a driven spline sleeve (507).
4. The current isolating device for the permanent magnet synchronous half direct-drive variable frequency speed regulating motor shaft according to claim 3, is characterized in that: a cavity (603) is formed in one side, far away from the rotor (2), of the machine shell (6), a spigot (604) is formed in one side of the cavity (603), and one side of the inner gear ring (9) is matched and positioned with the spigot (604).
5. The current isolating device for the permanent magnet synchronous half direct-drive variable frequency speed regulating motor shaft according to claim 3, is characterized in that: and a second bearing (3) is arranged on one side of the planet carrier (10), and the inner gear ring (9) is rotationally connected with the planet carrier (10) through the second bearing (3).
6. The current isolating device for the permanent magnet synchronous half direct-drive variable frequency speed regulating motor shaft according to claim 1, is characterized in that: the planetary gear train (13) is of a low-speed large-torque structure, the number of single-stage planetary gears is three or four, the planetary gear train (13) is lubricated by oil immersion, and the height of a gear immersed in lubricating oil is one to two times of the tooth crest height.
7. The current isolating device for the permanent magnet synchronous half direct-drive variable frequency speed regulating motor shaft according to claim 1, is characterized in that: the first bearing (602) is preferably a self-aligning roller bearing and is a double-row roller, the outer ring is provided with 1 common spherical raceway, the inner ring is provided with 2 raceways, and the first bearing is inclined to the axis of the bearing at an angle; the second bearing (3) is preferably a deep groove ball bearing.
8. The separation method for the current separation device of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft according to any one of claims 1 to 7 is characterized by comprising the following steps:
s1, assembling the stator (1) and the rotor (2) in place, and ensuring the end faces of the stator (1) and the rotor (2) to be aligned;
s2, cleaning the parts before installation, wherein the parts after cleaning need to be wiped dry by cleaning solution remained on the surfaces of the parts;
s3, sequentially mounting a driving spline sleeve (501), an insulating pad (502), a driven spline sleeve (507), an insulating sleeve (503), an insulating flat washer (504) and a spring pad (505) at the shaft extension end of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor, screwing by using an inner hexagonal socket head screw, completing one-time clamping, wherein the coaxiality precision reaches the drawing requirement, and the assembly reference is consistent with the processing reference requirement;
s4, the shell (6) is vertically placed on the workbench, the planetary reduction gear is hoisted to the position above the shell (6) and slowly descends, the planetary reduction gear can quickly descend after the screw enters the aperture of the shell (6), and the planetary reduction gear is ensured to be aligned with the end face of the shell;
s5, mounting the front end cover, smearing sealant on the joint surface, and assembling the vent valve in place. Installing a cooling fan, a cooling fan cover and the like, and filling lubricating oil;
and S6, after the assembly is completed, rotating the test bed to perform an idle running experiment, and detecting the current partition effect of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft.
9. The separation method for the current separation device of the permanent magnet synchronous semi-direct-drive variable frequency speed control motor shaft according to claim 8, characterized by comprising the following steps: the permanent magnet synchronous semi-direct-drive variable-frequency speed control motor is a large and medium permanent magnet synchronous semi-direct-drive variable-frequency speed control motor, is a 16-pole to 20-pole variable-frequency high-low voltage power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111499367.9A CN114123663A (en) | 2021-12-09 | 2021-12-09 | Current isolating device and method for permanent magnet synchronous semi-direct-drive variable frequency speed regulation motor shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111499367.9A CN114123663A (en) | 2021-12-09 | 2021-12-09 | Current isolating device and method for permanent magnet synchronous semi-direct-drive variable frequency speed regulation motor shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114123663A true CN114123663A (en) | 2022-03-01 |
Family
ID=80364040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111499367.9A Pending CN114123663A (en) | 2021-12-09 | 2021-12-09 | Current isolating device and method for permanent magnet synchronous semi-direct-drive variable frequency speed regulation motor shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114123663A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477849A (en) * | 2023-12-28 | 2024-01-30 | 大庆虹铭科技有限公司 | Permanent magnet semi-direct driving device of pumping unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030052557A1 (en) * | 2001-08-27 | 2003-03-20 | Mitsubishi Heavy Industries, Ltd. | Rotor coupling having insulated structure |
| JP2012167749A (en) * | 2011-02-15 | 2012-09-06 | Mazda Motor Corp | Power transmission device |
| JP2016194286A (en) * | 2015-04-01 | 2016-11-17 | 株式会社東芝 | Insulating spacer of rotor of rotating electrical machine |
| CN206539529U (en) * | 2017-03-17 | 2017-10-03 | 浙江义乌星耀风机有限公司 | A kind of gas centrifugal blower fan diaphragm type coupler of anti-shaft current |
| CN110120723A (en) * | 2019-04-30 | 2019-08-13 | 中汽研汽车检验中心（天津）有限公司 | A kind of new-energy automobile power drive system motor axial direction electromagnetic disturbance cancellation element |
-
2021
- 2021-12-09 CN CN202111499367.9A patent/CN114123663A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030052557A1 (en) * | 2001-08-27 | 2003-03-20 | Mitsubishi Heavy Industries, Ltd. | Rotor coupling having insulated structure |
| JP2012167749A (en) * | 2011-02-15 | 2012-09-06 | Mazda Motor Corp | Power transmission device |
| JP2016194286A (en) * | 2015-04-01 | 2016-11-17 | 株式会社東芝 | Insulating spacer of rotor of rotating electrical machine |
| CN206539529U (en) * | 2017-03-17 | 2017-10-03 | 浙江义乌星耀风机有限公司 | A kind of gas centrifugal blower fan diaphragm type coupler of anti-shaft current |
| CN110120723A (en) * | 2019-04-30 | 2019-08-13 | 中汽研汽车检验中心（天津）有限公司 | A kind of new-energy automobile power drive system motor axial direction electromagnetic disturbance cancellation element |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477849A (en) * | 2023-12-28 | 2024-01-30 | 大庆虹铭科技有限公司 | Permanent magnet semi-direct driving device of pumping unit |
| CN117477849B (en) * | 2023-12-28 | 2024-03-22 | 大庆虹铭科技有限公司 | Permanent magnet semi-direct driving device of pumping unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2375822Y (en) | Oil and liquid lubricating device for electric hub speed reducer of electric bicycle | |
| KR101719076B1 (en) | Slewing drive | |
| CN203352353U (en) | Bearing structure of double-fed wind-driven generator | |
| CN114123663A (en) | Current isolating device and method for permanent magnet synchronous semi-direct-drive variable frequency speed regulation motor shaft | |
| CN211778536U (en) | Parallel bearing rotor system, motor and electric appliance | |
| CN109149111B (en) | Direct-drive radar rotary table | |
| CN114204757B (en) | Manufacturing method of flameproof variable-frequency low-speed direct-drive water-cooled three-phase asynchronous motor | |
| CN210297420U (en) | Magnetic suspension motor bearing for two-for-one twister | |
| CN101317313B (en) | Top drive drilling system using low-speed direct-driven AC motor, and application thereof | |
| CN221462760U (en) | Bearing component of forced circulation lubrication structure | |
| CN216612818U (en) | Electric roller | |
| CN111628600A (en) | Yaw double-frequency brake motor for wind power generation | |
| CN221240195U (en) | Pressure-bearing sealing structure and motor | |
| CN221709566U (en) | Electrically driven screw drive mechanism | |
| CN220254252U (en) | Power device, electric propeller and movable water area equipment | |
| CN221597567U (en) | Waterproof and oil-proof sealing device for motor | |
| CN212323868U (en) | Sealing structure of speed reducing motor | |
| CN216767839U (en) | Lubricating system for double-suction pump bearing | |
| CN203477316U (en) | Shaft head seal | |
| CN115319793B (en) | Full-sealed heavy-load joint structure, joint structure mounting method and robot | |
| CN221921894U (en) | Walking speed reducer and engineering machinery | |
| CN214036710U (en) | Worm gear speed reducer with lubricating bearing assembly | |
| CN220891043U (en) | Gearbox overflow arrangement and lathe | |
| CN221067680U (en) | Electric forklift drive axle and electric forklift | |
| CN208424042U (en) | A kind of brushless DC motor supporting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220301 |
|
| RJ01 | Rejection of invention patent application after publication |