High-wear-resistant industrial motor rotating shaft

Abstract

The application discloses a high-wear-resistance industrial motor rotating shaft, which comprises a rotating shaft body, a rotor fixedly arranged on the outer side of the rotating shaft body, a tungsten carbide coating sprayed on the outer side of the rotating shaft body, a machine shell arranged on the outer side of the rotor, a machine shell rear cover arranged on the rear side of the machine shell, a rotating shaft hole formed in the front side of the machine shell, the rotating shaft body movably connected with the rotating shaft hole, and a rear bearing arranged on the inner side of the machine shell rear cover. The device is developed by using a multilayer composite elastomer sealing material, the outer layer is high-wear-resistance fluorine rubber, the inner layer is embedded with a graphene reinforced polyimide fiber layer (self-lubricating and heat conducting), the middle layer is a flexible metal mesh (anti-deformation support), a "pressure balance-self-compensation" linkage sealing structure is designed, the contact pressure between the sealing element and the shaft is dynamically adjusted through the internal air pressure change of the sealing cavity, meanwhile, a wear amount feedback mechanism is integrated, the sealing performance is self-adaptable, and the high-wear-resistance industrial motor rotating shaft can meet the use requirement of traditional new energy automobile motor rotating shafts.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle motor shaft technology, and in particular to a high wear-resistant industrial motor shaft. Background Technology

[0002] New energy electric vehicles refer to vehicles that use on-board power sources to drive their wheels with electric motors and meet all road traffic and safety regulations. The motor in a new energy electric vehicle converts electrical energy into mechanical energy, which drives the transmission device or directly drives the wheels and working devices. The motor shaft, as a major component of the motor, requires high wear resistance.

[0003] A search revealed that publication number CN107666200B discloses a high-efficiency silicon nitride degassing rotor device, mainly composed of a rotor shaft and a rotor. The bottom end of the rotor shaft is fixed to the center hole of the rotor by a threaded connection. The top of the rotor shaft has an integrally formed connector with a threaded structure on its outer surface. In this invention, the entire rotor shaft achieves triangular support under the action of the inclined stabilizing rod and the connecting rod. When the outer fixing ring is fixed, the entire rotor shaft can be stably in a vertical state. Therefore, during high-speed rotation, the rotor shaft will not only not deviate, but also cause less damage to the motor shaft, thus reducing the later maintenance cost.

[0004] Current technologies primarily rely on contact seals between the shaft and the housing: lip seals (skeleton oil seals) are widely used, depending on the interference fit between the elastic material and the shaft to achieve a seal. Alternatively, non-contact seals can be used as auxiliary seals: labyrinth structures or air gap designs reduce friction, but their dust and water resistance is limited.

[0005] The sealing elastomers used in traditional new energy vehicle motor shafts are prone to hardening and cracking under continuous high temperature and frictional heat accumulation, leading to seal failure, grease leakage or intrusion of external contaminants. Existing composite seals (such as mechanical + magnetic seals) have independent components that lack synergy and are not adaptable to axial / radial vibration. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention provides a high wear-resistant industrial motor shaft. The sealing elastomer used in traditional new energy vehicle motor shafts is prone to hardening and cracking under continuous high temperature and frictional heat accumulation, leading to seal failure, grease leakage or intrusion of external contaminants. Existing composite seals (such as mechanical + magnetic seals) have each component working independently, lacking synergistic effect, and are not adaptable to axial / radial vibration.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A high wear-resistant industrial motor shaft includes a shaft body, a rotor fixedly mounted on the outer side of the shaft body, and a tungsten carbide coating sprayed on the outer side of the shaft body to improve its wear resistance. A housing is mounted on the outer side of the rotor, and a rear cover is mounted on the rear side of the housing. A shaft hole is opened on the front side of the housing, and the shaft body is movably connected to the shaft hole. A rear bearing is mounted on the inner side of the rear cover, and the rear end of the shaft body is fixedly installed to the inner ring of the rear bearing. A main sealing module is sleeved on the outer side of the shaft body and installed between the housing and the shaft body. An auxiliary compensation module is sleeved on the outer side of the main sealing module. A coil winding is mounted on the inner wall of the housing, and the rotor is located inside the coil winding. When energized, the coil winding and rotor drive the shaft body to rotate. This is existing technology.

[0009] Preferably, the rear cover of the housing has multiple air inlets, four positioning pins, and four positioning holes on the rear side of the housing; the four positioning pins are matched with the four positioning holes; the rear cover of the housing can be detached from the housing.

[0010] Preferably, an interference groove is formed on the inner wall of the housing, the main sealing module is interference-fitted with the interference groove, and the shaft hole is connected to the interference groove. The main sealing module includes, from the outside to the inside, an outer fluororubber layer, a middle flexible metal mesh layer and an inner graphene fiber layer. The outer fluororubber layer is fluororubber, which is resistant to high temperature and corrosion. The middle flexible metal mesh layer is a flexible metal mesh, a nickel-based alloy, which provides radial support. The inner graphene fiber layer is graphene-reinforced polyimide fiber, which is self-lubricating and reduces the coefficient of friction.

[0011] Preferably, the auxiliary compensation module includes an annular airbag, which is sleeved on the outside of the main sealing module. A nitrogen replenishment pipe is connected to the annular airbag, which extends to the outside of the housing and is connected to a nitrogen tank. A pressure regulating valve is provided on the nitrogen replenishment pipe, and the nitrogen replenishment pipe is sealed to the housing. A spare sealing ring is provided on the rear side of the annular airbag. Multiple piezoelectric ceramic sensors are provided inside the annular airbag. The multiple piezoelectric ceramic sensors are externally connected to the same controller through wires, which extend to the outside along the position of the nitrogen replenishment pipe.

[0012] Compared with the prior art, the advantages of the present invention are as follows: when the temperature rises and causes the sealing ring to expand, the annular airbag expands due to heat, which pushes the piezoelectric ceramic sensor of the auxiliary compensation module, triggers the pressure regulating valve, and injects low-temperature inert gas such as nitrogen into the sealing cavity of the annular airbag through the nitrogen replenishment pipe to reduce the local temperature. If the wear of the sealing ring exceeds the threshold, the piezoelectric ceramic sensor will provide feedback, and the system will automatically activate the backup sealing ring. The backup sealing ring is a redundant design.

[0013] Preferably, a support rod positioning groove is provided on the inner wall of the housing, a support plate is provided on the inner side of the support rod positioning groove, and a limit block is provided on the inner wall of the support rod positioning groove (not shown in the figure, but common knowledge). A positioning notch is provided at the bottom of the support plate, which is adapted to the limit block. Multiple connecting holes are provided on the support plate, and a through hole is provided at the center of the support plate. The rotating shaft body is rotatably connected to the through hole through a front bearing.

[0014] Preferably, the support plate has an interference notch and two pliers pinch holes located on both sides of the interference notch.

[0015] Preferably, the inner wall of the housing is provided with three spiral air grooves, which are spirally distributed along the axial direction, similar to a thread structure. The spiral angle of the spiral air groove is 15°, the groove depth is 1mm, and the groove width is 2mm. A centrifugal fan is provided at the rear end of the rotating shaft body.

[0016] Compared with the prior art, the advantages of the present invention are: if the wear of the sealing ring exceeds the threshold, the system automatically activates the backup sealing ring based on feedback from the piezoelectric ceramic sensor. The backup sealing ring is a redundant design and the wear debris is discharged more quickly by a centrifugal fan.

[0017] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0018] This device features an innovative multi-layer composite sealing structure.

[0019] It adopts a three-layer composite sealing structure consisting of an outer fluororubber layer (corrosion resistant), a middle flexible metal mesh (deformation resistant), and an inner graphene fiber layer (self-lubricating), breaking through the performance limitations of traditional single-material seals.

[0020] 2. Dynamic pressure compensation and redundant seal linkage

[0021] The system integrates an annular airbag (temperature / wear monitoring), a piezoelectric sensor (feedback control), and a spare sealing ring (redundant execution) to achieve dynamic adjustment of sealing pressure and emergency response to failure.

[0022] 3. Spiral air duct - centrifugal fan negative pressure dust prevention system

[0023] A spiral air groove (15° spiral angle) is opened on the inner wall of the casing, which, together with the centrifugal fan at the end of the shaft, forms a directional airflow barrier to enhance the non-contact sealing.

[0024] This invention develops a multi-layer composite elastomer sealing material. The outer layer is a high-wear-resistant fluororubber, the inner layer is an embedded graphene-reinforced polyimide fiber layer (self-lubricating and thermally conductive), and the middle layer is a flexible metal mesh (anti-deformation support). It designs a "pressure balance-self-compensation" linkage sealing structure, which dynamically adjusts the contact pressure between the seal and the shaft by the change of air pressure inside the sealing cavity. At the same time, it integrates a wear feedback mechanism to achieve adaptive sealing performance, which can meet the requirements of traditional new energy vehicle motor shafts. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the exploded structure of the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the side view structure;

[0027] Figure 3 This is a schematic diagram of the main structure of the present invention;

[0028] Figure 4 for Figure 3 A schematic diagram of the side view structure;

[0029] Figure 5 This is a schematic diagram of the internal structure of the housing of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the housing, coil winding and related parts of the present invention;

[0031] Figure 7 This is a three-dimensional structural diagram of the support plate and related parts of the present invention;

[0032] Figure 8 This is a side view of the support plate and related parts of the present invention.

[0033] Figure 9 This is a perspective structural diagram of the rotating shaft body, rotor, centrifugal fan and related parts of the present invention;

[0034] Figure 10 This is a schematic diagram of the main sealing module of the present invention;

[0035] Figure 11 This is an exploded view of the main sealing module of the present invention;

[0036] Figure 12 This is a schematic diagram of the auxiliary compensation module of the present invention;

[0037] Figure 13 This is a cross-sectional view of the auxiliary compensation module of the present invention.

[0038] The components include: 1. Housing; 11. Shaft hole; 12. Rear cover of housing; 121. Air inlet; 122. Positioning pin; 123. Rear bearing; 13. Positioning hole; 14. Interference fit groove; 15. Support rod positioning groove; 16. Spiral air groove; 17. Coil winding;

[0039] 2. Shaft body; 21. Rotor; 22. Tungsten carbide coating;

[0040] 3. Main sealing module; 31. Outer fluororubber layer; 32. Middle flexible metal mesh layer; 33. Inner graphene fiber layer;

[0041] 4. Auxiliary compensation module; 41. Annular airbag; 42. Nitrogen replenishment pipe; 43. Piezoelectric ceramic sensor; 44. Spare sealing ring; 45. Pressure regulating valve;

[0042] 5. Support plate; 51. Connecting hole; 52. Through hole; 53. Interference notch; 54. Pliers pinch hole; 55. Front bearing; 56. Positioning notch; 6. Centrifugal fan. Detailed Implementation

[0043] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0044] Example 1

[0045] like Figures 1-13As shown, this invention provides a high wear-resistant industrial motor shaft, including a shaft body 2, a rotor 21 fixedly mounted on the outer side of the shaft body 2, a tungsten carbide coating 22 sprayed on the outer side of the shaft body 2 to improve the wear resistance of the shaft body 2, a housing 1 mounted on the outer side of the rotor 21, a housing rear cover 12 mounted on the rear side of the housing 1, a shaft hole 11 opened on the front side of the housing 1, the shaft body 2 being movably connected to the shaft hole 11, a rear bearing 123 mounted on the inner side of the housing rear cover 12, the rear end of the shaft body 2 being fixedly installed with the inner ring of the rear bearing 123, and a main sealing module 3 sleeved on the outer side of the shaft body 2. A sealing module 3 is installed between the housing 1 and the rotating shaft body 2. An auxiliary compensation module 4 is sleeved on the outside of the main sealing module 3. A coil winding 17 is provided on the inner wall of the housing 1. The rotor 21 is located inside the coil winding 17. When energized, the coil winding 17 and the rotor 21 drive the rotating shaft body 2 to rotate. This is existing technology. The rear cover 12 of the housing has multiple air inlets 121 and four positioning pins 122. The rear side of the housing 1 has four positioning holes 13. The four positioning pins 122 are matched with the four positioning holes 13. The rear cover 12 of the housing can be disassembled from the housing 1.

[0046] like Figure 5 , Figure 6 , Figure 10 , Figure 11 As shown, in this embodiment, an interference groove 14 is formed on the inner wall of the housing 1. The main sealing module 3 is interference-fitted with the interference groove 14, and the shaft hole 11 is connected to the interference groove 14. The main sealing module 3 includes, from the outside to the inside, an outer fluororubber layer 31, a middle flexible metal mesh layer 32, and an inner graphene fiber layer 33. The outer fluororubber layer 31 is fluororubber, which is resistant to high temperature and corrosion. The middle flexible metal mesh layer 32 is a flexible metal mesh, a nickel-based alloy, which provides radial support. The inner graphene fiber layer 33 is graphene-reinforced polyimide fiber, which is self-lubricating and reduces the coefficient of friction.

[0047] Specifically, the outer fluororubber layer 31 (thickness 0.5mm) → corrosion-resistant layer.

[0048] Intermediate flexible metal mesh layer 32 (thickness 0.2mm, mesh diameter 0.1mm) → deformation-resistant layer.

[0049] Inner graphene fiber layer 33 (thickness 0.3 mm, fiber density 60%) → self-lubricating layer.

[0050] More specifically, temperature resistance: The fluororubber layer (temperature resistance 200℃) + graphene fiber thermal conductivity (reducing frictional heat accumulation) increases the upper limit of temperature resistance by 67% compared to traditional rubber (≤120℃).

[0051] Friction coefficient: The measured friction coefficient of the graphene fiber layer (fiber density 60%) is ≤0.08, which is 33% lower than that of traditional polytetrafluoroethylene (0.12~0.15).

[0052] Wear resistance: Tungsten carbide coating (spindle surface hardness ≥1500HV) + graphene layer wear rate ≤0.01mm / thousand hours, lifespan extended to 3 times that of traditional designs.

[0053] like Figure 12 , Figure 13 As shown, in this embodiment, the auxiliary compensation module 4 includes an annular airbag 41, which is sleeved on the outside of the main sealing module 3. A nitrogen replenishment pipe 42 is connected to the annular airbag 41. The nitrogen replenishment pipe 42 extends to the outside of the housing 1 and is connected to a nitrogen tank. A pressure regulating valve 45 is provided on the nitrogen replenishment pipe 42. The nitrogen replenishment pipe 42 is sealed to the housing 1. A spare sealing ring 44 is provided on the rear side of the annular airbag 41. Multiple piezoelectric ceramic sensors 43 are provided inside the annular airbag 41. The multiple piezoelectric ceramic sensors 43 are connected to the same controller through wires. The wires extend to the outside along the position of the nitrogen replenishment pipe 42.

[0054] Specifically, when the temperature rises and causes the sealing ring to expand, the annular airbag 41 expands due to heat, pushing the piezoelectric ceramic sensor 43 of the auxiliary compensation module 4, triggering the pressure regulating valve 45, and injecting low-temperature inert gas such as nitrogen into the sealing cavity of the annular airbag 41 through the nitrogen replenishment pipe 42 to reduce the local temperature. If the wear of the sealing ring exceeds the threshold, the piezoelectric ceramic sensor 43 will provide feedback, and the system will automatically activate the backup sealing ring 44. The backup sealing ring 44 is a redundant design.

[0055] More specifically, response speed: after the piezoelectric sensor detects excessive wear, the spare sealing ring completes the bonding within 0.5 seconds (shape memory alloy driving temperature ≥80℃).

[0056] Adaptive range: The flexible metal mesh layer can compensate for radial runout of the shaft by ±0.15mm, adapting to vibration conditions (≤5g acceleration).

[0057] like Figure 5 , Figure 7 , Figure 8 As shown in the figure, in this embodiment, a support rod positioning groove 15 is provided on the inner wall of the housing 1, and a support plate 5 is provided on the inner side of the support rod positioning groove 15. A limit block is provided on the inner wall of the support rod positioning groove 15. The limit block is not shown in the figure, but is common knowledge. A positioning notch 56 is provided at the bottom of the support plate 5. The positioning notch 56 is adapted to the limit block. A plurality of connecting holes 51 are provided on the support plate 5. A through hole 52 is provided at the center of the support plate 5. The rotating shaft body 2 is rotatably connected to the through hole 52 through the front bearing 55.

[0058] Specifically, the support plate is equipped with pliers-shaped pinch holes (positioning notches) and interference notches, enabling quick assembly and disassembly of the main sealing module (without disassembling the bearing). Maintenance time: Modular replacement of the sealing ring takes ≤30 minutes, which is 75% more efficient than the traditional solution (requires bearing disassembly, taking ≥2 hours).

[0059] Figure 7 , Figure 8 As shown, in this embodiment, the support plate 5 has an interference notch 53 and two pliers pinch holes 54, which are located on both sides of the interference notch 53.

[0060] In this embodiment, the working mode is as follows: When in use, the shaft body 2 rotates upon power-on. The support plate 5 is used to support the shaft body 2, and the main sealing module 3 is used to seal the shaft body 2 with the shaft hole 11. Stage 1: Normal operation: The main sealing module 3 maintains appropriate contact with the shaft through the elastic pre-tightening force of the intermediate flexible metal mesh layer 32. The inner graphene fiber layer 33 provides self-lubrication, reducing the coefficient of friction.

[0061] Phase 2: High Temperature / High Wear Condition: When the temperature rises and causes the sealing ring to expand, the annular airbag 41 expands due to heat, pushing the piezoelectric ceramic sensor 43 of the auxiliary compensation module 4, triggering the pressure regulating valve 45, and injecting low temperature inert gas such as nitrogen into the sealing cavity of the annular airbag 41 through the nitrogen replenishment pipe 42 to reduce the local temperature. If the wear of the sealing ring exceeds the threshold, the piezoelectric ceramic sensor 43 will provide feedback, and the system will automatically activate the backup sealing ring 44. The backup sealing ring 44 is a redundant design, and the centrifugal fan 6 will accelerate the discharge of wear debris.

[0062] Comparison of the sealing technology of this invention with traditional sealing technologies:

[0063] Sealing material Single-layer rubber or polytetrafluoroethylene Three-layer composite structure (fluororubber + metal mesh + graphene) Wear compensation Manual periodic replacement of seals Piezoelectric sensor + shape memory alloy automatic compensation Dustproof design Static Maze Sealing Spiral air duct + centrifugal fan dynamic negative pressure barrier Maintenance mode Complete disassembly and repair Modular quick-change (pliers pinch hole positioning)

[0064] Performance comparison of this invention with traditional technologies:

[0065]

[0066]

[0067] Example 2

[0068] like Figure 5 , Figure 6 , Figure 9 As shown, this embodiment is a further optimization based on Embodiment 1. The parts that are the same as those described above will not be repeated here. Figure 2 , Figure 3As shown, in order to better realize the present invention, the following configuration is adopted: In this embodiment, three spiral air grooves 16 are provided on the inner wall of the housing 1. The spiral air grooves 16 are spirally distributed along the axial direction, similar to a thread structure. The spiral angle of the spiral air grooves 16 is 15°, the groove depth is 1mm, and the groove width is 2mm. A centrifugal fan 6 is provided at the rear end of the rotating shaft body 2.

[0069] Specifically, the spiral groove 16 is a spiral groove machined on the inner wall of the housing 1 (similar to the rifling of a gun barrel).

[0070] Airflow velocity: When the centrifugal fan is at 6000 rpm, the outlet air velocity of the spiral air duct is ≥12 m / s, which effectively blocks dust (particle size ≥10 μm).

[0071] Protection rating: Negative pressure airflow improves the protection rating from IP65 to IP68 (actual test showed no penetration after immersion in 1m water for 30 minutes).

[0072] like Figures 6-9 As shown, in this embodiment, when the rotating shaft body 2 rotates, it drives the centrifugal fan 6 to rotate. The spiral air groove 16 in the pressure balance zone guides the airflow to form a negative pressure barrier, preventing external dust / liquid from entering the non-contact type. If the wear of the sealing ring exceeds the threshold, the piezoelectric ceramic sensor 43 provides feedback, and the system automatically activates the backup sealing ring 44. The backup sealing ring 44 is a redundant design, and the centrifugal fan 6 accelerates the discharge of wear debris.

[0073] Specifically, airflow generation: the shaft rotates → the centrifugal fan generates high-speed airflow → the airflow forms a spiral negative pressure barrier along the spiral groove.

[0074] Contamination protection: External dust / liquid → is blown away from the sealed area by negative pressure airflow → and discharged through the exhaust port of the casing.

[0075] Example 3

[0076] This embodiment is a further optimization based on Embodiment 1. The parts that are the same as those in the aforementioned technical solution will not be repeated here. Furthermore, in order to better realize the present invention, the following configuration is adopted: In this embodiment, a micro-flow lubrication pump (flow rate 0.1 mL / h) is integrated on the support plate 5 to continuously supply grease to the bearing through the connecting hole 51.

[0077] Lubrication condition monitoring: An acoustic emission sensor is embedded in the bearing housing to monitor the grease film thickness in real time (accuracy ±0.01mm).

[0078] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high wear-resistant industrial motor shaft, comprising a shaft body (2), wherein a rotor (21) is fixedly disposed on the outer side of the shaft body (2), characterized in that: The outer side of the shaft body (2) is coated with tungsten carbide coating (22). The outer side of the rotor (21) is provided with a housing (1). The rear side of the housing (1) is provided with a housing back cover (12). The front side of the housing (1) is provided with a shaft hole (11). The shaft body (2) is movably connected to the shaft hole (11). The inner side of the housing back cover (12) is provided with a rear bearing (123). The rear end of the shaft body (2) is fixedly installed with the inner ring of the rear bearing (123). The outer side of the shaft body (2) is provided with a main sealing module (3). The main sealing module (3) is installed between the housing (1) and the shaft body (2). The outer side of the main sealing module (3) is provided with an auxiliary compensation module (4). The main sealing module (3) includes, from the outside to the inside, an outer fluororubber layer (31), a middle flexible metal mesh layer (32) and an inner graphene fiber layer (33). The outer fluororubber layer (31) is fluororubber, the middle flexible metal mesh layer (32) is a flexible metal mesh, and the inner graphene fiber layer (33) is graphene-reinforced polyimide fiber. The auxiliary compensation module (4) includes an annular airbag (41), which is sleeved on the outside of the main sealing module (3). A nitrogen replenishment pipe (42) is connected to the annular airbag (41). The nitrogen replenishment pipe (42) extends to the outside of the housing (1) and is connected to a nitrogen tank. A pressure regulating valve (45) is provided on the nitrogen replenishment pipe (42). The nitrogen replenishment pipe (42) is sealed to the housing (1). A spare sealing ring (44) is provided on the rear side of the annular airbag (41). The annular airbag (41) is equipped with multiple piezoelectric ceramic sensors (43). The multiple piezoelectric ceramic sensors (43) are connected to the same controller via wires, which extend to the outside along the position of the nitrogen replenishment tube (42).

2. The high wear-resistant industrial motor shaft according to claim 1, characterized in that: The inner wall of the housing (1) is provided with a coil winding (17), and the rotor (21) is located inside the coil winding (17).

3. The high wear-resistant industrial motor shaft according to claim 1, characterized in that: The rear cover (12) of the housing is provided with multiple air inlets (121), and four positioning pins (122) are provided on the rear cover (12). Four positioning holes (13) are provided on the rear side of the housing (1). The four positioning pins (122) are matched with the four positioning holes (13).

4. The high wear-resistant industrial motor shaft according to claim 1, characterized in that: The inner wall of the housing (1) is provided with a support rod positioning groove (15), and a support plate (5) is provided on the inner side of the support rod positioning groove (15). A limit block is provided on the inner wall of the support rod positioning groove (15). A positioning notch (56) is provided at the bottom of the support plate (5). The positioning notch (56) is adapted to the limit block. Multiple connecting holes (51) are provided on the support plate (5). A through hole (52) is provided at the center of the support plate (5). The rotating shaft body (2) is rotatably connected to the through hole (52) through the front bearing (55).

5. A high wear-resistant industrial motor shaft according to claim 4, characterized in that: The support plate (5) has an interference notch (53) and two pliers pinch holes (54) on the support plate (5), which are located on both sides of the interference notch (53).

6. The high wear-resistant industrial motor shaft according to claim 1, characterized in that: The inner wall of the housing (1) is provided with three spiral air grooves (16). The spiral air grooves (16) are spirally distributed along the axial direction. The spiral angle of the spiral air grooves (16) is 15°, the groove depth is 1mm, and the groove width is 2mm.

7. A high wear-resistant industrial motor shaft according to claim 1, characterized in that: A centrifugal fan (6) is provided at the rear end of the rotating shaft body (2).

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