A high speed motor cooling system

Abstract

The application relates to the field of mechanical equipment and discloses a high-speed motor cooling system, which comprises a high-speed motor, a gas turbine and a cooling system; the high-speed motor comprises a casing with a mounting space; the gas turbine is in transmission connection with the high-speed motor and comprises a shell with a containing space; wherein the high-speed motor is provided with a cooling air inlet and a cooling air outlet which are both in communication with the mounting space; the cooling air outlet is located on the side facing the gas turbine, and the cooling air inlet is located on the side away from the gas turbine; a cooling channel for cooling air circulation is formed from the cooling air inlet to the cooling air outlet; the gas turbine is provided with an air outlet and an air inlet which are both in communication with the containing space; the air outlet is located on the side facing the high-speed motor, the air outlet is in communication with the cooling air inlet, and the air inlet is in communication with the cooling air outlet through a pipeline; the cooling equipment in the whole system is reduced, the integration degree of the whole system is improved, the temperature of the high-speed motor is reduced, and the stability of the system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical equipment, in particular to a high-speed motor cooling system. BACKGROUND

[0002] When a micro gas turbine drives a conventional low-speed motor, a gear reduction device is needed in the middle. The conventional low-speed motor and the gear reduction device are relatively large in size, and a large temperature rise will occur in the low-speed motor and the gear reduction device during operation, and a special cooling device is needed for heat dissipation. This often causes many problems for micro gas turbines with high size requirements, including but not limited to:

[0003] 1- High cost: The gear reduction device and the cooling device not only increase the procurement cost, but also the volume of the low-speed motor and the gear reduction device plus the cooling device is often larger than that of the micro gas turbine, which requires a special place and assembly personnel for installation;

[0004] 2- Complex system: The gear reduction device and the external cooling device increase the complexity of the entire system, including pipelines, drives, and connecting components, making the entire system more complex.

[0005] 3- Reduced stability: The cooling device and the pipeline control device require high control accuracy, and the gear reduction device has high requirements for lubrication and sealing. The failure of the gear reduction device and the cooling device itself can affect the smooth operation of the entire system, reducing the stability of the system.

[0006] 4- Low efficiency: The power generation efficiency of the conventional low-speed motor is low, and the gear reduction device will cause power loss, and the longer the time, the greater the power loss, resulting in low efficiency of the entire system. SUMMARY

[0007] The present application discloses a high-speed motor cooling system, which reduces the cooling device in the entire system, improves the integration of the entire system, and reduces the temperature of the high-speed motor, thereby improving the stability of the system.

[0008] To achieve the above purpose, the present application provides the following technical scheme:

[0009] A high-speed motor cooling system, comprising:

[0010] A high-speed motor, the high-speed motor comprising a casing, the casing having a mounting space;

[0011] A gas turbine in driving connection with the high-speed motor, the gas turbine comprising an outer shell, the outer shell having a containing space;

[0012] The high-speed motor has a cooling air inlet and a cooling air outlet, both of which are in communication with the mounting space, the cooling air outlet is located on the side facing the gas turbine, and the cooling air inlet is located on the side away from the gas turbine, and a cooling channel for the flow of cooling air is formed from the cooling air inlet to the cooling air outlet.

[0013] The gas turbine has an air outlet and an air inlet, both of which are in communication with the containing space, the air outlet is located on the side facing the high-speed motor, the air outlet is in communication with the cooling air inlet, and the air inlet is in communication with the cooling air outlet through a pipeline.

[0014] The high-speed motor can output higher power in a smaller volume, greatly improving the power density. The gas turbine is drivingly connected with the high-speed motor, and the high-speed motor is directly driven by the gas turbine to generate power, reducing the intermediate gear transmission device, simplifying the system structure, and improving the system stability. In view of the small volume and large temperature rise of the high-speed motor, most of the high-speed motors currently use rotor ventilation cooling measures, which require a special cooling system for the high-speed motor, which not only requires additional space to install cooling equipment, but also increases the complexity and cost of the system. In order to solve the above problems, the present application provides a high-speed motor cooling system, which is suitable for the high-speed motor of the gas turbine, and the cooling air for cooling the high-speed motor is introduced from the side of the gas turbine. The high-speed motor has a cooling air inlet and a cooling air outlet, both of which are in communication with the mounting space, the cooling air outlet is located on the side facing the gas turbine, and the cooling air inlet is located on the side away from the gas turbine, and a cooling channel for the flow of cooling air is formed from the cooling air inlet to the cooling air outlet, the gas turbine has an air outlet and an air inlet, both of which are in communication with the containing space, the air outlet is located on the side facing the high-speed motor, the air outlet is in communication with the cooling air inlet, and the air inlet is in communication with the cooling air outlet through a pipeline. The cooling air flows from the air outlet of the gas turbine to the cooling air inlet in the high-speed motor and enters the mounting space in the high-speed motor, the cooling air flowing through the cooling channel of the high-speed motor flows out of the cooling air outlet to the air outlet of the gas turbine, and then the cooling air after the high-speed motor enters the containing space of the gas turbine, reducing the equipment in the entire system and improving the integration of the entire system.

[0015] Optionally, the high-speed motor includes a main shaft located in the mounting space;

[0016] The gas turbine includes a gas turbine shaft, a compressor and a turbine located in the containing space, the compressor is arranged at one end of the gas turbine shaft, and the turbine is sleeved on the end of the gas turbine shaft away from the compressor;

[0017] The one end of the main shaft is drivingly connected with the one end of the gas turbine shaft close to the compressor.

[0018] Optionally, the engine shaft and the main shaft are connected through a coupling.

[0019] Optionally, the cooling air inlet is provided with a one-way valve.

[0020] Optionally, the high-speed motor further comprises a rotor magnet assembly sleeved on the main shaft.

[0021] a stator located in the mounting space, the stator having a mounting hole, the rotor magnet assembly being located in the mounting hole, and a side wall of the stator away from the mounting hole being connected with an inner wall of the casing, a gap being formed between the stator and the rotor magnet assembly, a first cooling channel being formed from the cooling air inlet to the cooling air outlet through the gap.

[0022] Optionally, a main shaft axial ventilation hole is formed on the main shaft body along the length direction of the main shaft.

[0023] A second cooling channel is formed from the cooling air inlet to the cooling air outlet through the main shaft axial ventilation hole.

[0024] Optionally, an axial ventilation passage is formed on the casing along the extension direction of the main shaft.

[0025] A third cooling channel is formed from the cooling air inlet to the cooling air outlet through the axial ventilation passage.

[0026] Optionally, the high-speed motor further comprises a front shaft head, a front pull rod, a rear shaft head and a rear pull rod, which are arranged along the extension direction of the main shaft.

[0027] One end of the main shaft towards the coupling is connected with the front shaft head through the front pull rod, and the front shaft head is connected with the coupling.

[0028] The other end of the main shaft away from the coupling is connected with the rear shaft head through the rear pull rod.

[0029] Optionally, the high-speed motor further comprises a front bearing seat, a front bearing sleeve, a front radial floating bearing, a rear bearing seat, a rear bearing sleeve and a rear radial floating bearing, which are arranged along the extension direction of the main shaft.

[0030] The front radial floating bearing sleeve is sleeved on the front shaft head, the front bearing sleeve is sleeved on the front radial floating bearing, the front bearing seat is located at one end of the main shaft towards the gas turbine, the front bearing seat is sleeved on the front bearing sleeve, and the front bearing seat is mounted on the casing away from the outer side of the front bearing sleeve.

[0031] The rear radial floating bearing sleeve is sleeved on the rear shaft head, the rear bearing sleeve is sleeved on the rear radial floating bearing, the rear bearing seat is located at an end of the main shaft away from the gas turbine, the rear bearing seat is sleeved on the rear bearing sleeve, and the rear bearing seat is mounted on the casing away from the outer side surface of the rear bearing sleeve.

[0032] Optionally, the cooling air outlet is arranged on the front bearing seat.

[0033] Optionally, the cooling air inlet is arranged on the rear bearing seat.

[0034] Optionally, the casing is formed with a water cooling jacket. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A connection structure diagram of a high-speed motor cooling system provided by an embodiment of the application is shown in the figure.

[0036] Figure 2 An internal structure diagram of a gas turbine of a high-speed motor cooling system provided by an embodiment of the application is shown in the figure.

[0037] Figure 3 An internal structure diagram of a high-speed motor in a high-speed motor cooling system provided by an embodiment of the application is shown in the figure.

[0038] Figure 4 A partial enlarged diagram corresponding to X in the figure is shown in the figure. Figure 3

[0039] Figure 5 A structure diagram of a flow path of a first cooling channel of cooling air of a high-speed motor cooling system provided by an embodiment of the application is shown in the figure.

[0040] Figure 6 A structure diagram of a flow path of a second cooling channel of cooling air of a high-speed motor cooling system provided by an embodiment of the application is shown in the figure.

[0041] Figure 7 A structure diagram of a flow path of a third cooling channel of cooling air of a high-speed motor cooling system provided by an embodiment of the application is shown in the figure.

[0042] ​In the figure: A-high speed motor; A1-mounting space; B-gas turbine; B1-housing; B2-accommodation space; 1-water cooling jacket; 2-front bearing seat; 3-cooling air outlet; 4-front bearing sleeve; 5-front radial air bearing; 6-front shaft head; 7-front pull rod; 8-front locking nut; 9-vibration sensor hole; 10-supporting leg; 11-water channel; 12-stator; 13-rotor magnet assembly; 14-main shaft; 15-rear bearing seat; 16-rear bearing sleeve; 17-rear radial air bearing; 18-rear pull rod; 19-rear shaft head; 20-main shaft axial ventilation hole; 21-axial ventilation channel; 22-one-way valve; 23-double sleeve end straight pipe joint; 24-lifting ring; 25-clearance; 26-casing; 27-sealing groove; 28-coupling; 29-compressor; 30-combustion chamber; 31-turbine; 32-gas turbine shaft; 33-air outlet; 34-air inlet; 35-pipeline. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] The high-speed motor A can output higher power in a smaller volume, and greatly improve the power density. In a distributed power generation system, that is, a smaller generator set is configured at the user site or close to the power consumption site, the gas turbine B directly drives the high-speed motor A to generate power, reduces the intermediate gear transmission device, simplifies the cooling system of the high-speed motor A provided in the embodiments of the present application, and improves the system stability. In view of the small volume and large temperature rise of the high-speed motor A, most of the high-speed motors A currently adopt the rotor ventilation cooling measure, and need to be equipped with special cooling equipment for the high-speed motor A, which not only needs additional space to install the cooling equipment, but also increases the complexity and cost of the system.

[0045] The embodiments of the present application provide a high-speed motor A cooling system, cooling air for cooling the high-speed motor A is directly introduced from the gas turbine compressor 29 side, which reduces the equipment in the whole system and improves the integration of the whole system.

[0046] The specific structure of the high-speed motor A cooling system provided in the embodiments of the present application is shown in the figure, the high-speed motor A cooling system comprises: Figures 1 to 4 The specific structure of the high-speed motor A cooling system provided in the embodiments of the present application is shown in the figure, the high-speed motor A cooling system comprises:

[0047] The high-speed motor A, the high-speed motor A comprises a casing 26, and the casing 26 has a mounting space A1;

[0048] The gas turbine B is in driving connection with the high-speed motor A, and the gas turbine B comprises a housing B1 having a containing space B2;

[0049] The high-speed motor A has a cooling air inlet and a cooling air outlet 3 both in communication with the mounting space A1, the cooling air outlet 3 is located on the side facing the gas turbine B, and the cooling air inlet is located on the side away from the gas turbine B, and a cooling channel for the cooling air to flow through is formed from the cooling air inlet to the cooling air outlet 3;

[0050] The gas turbine B has an air outlet 33 and an air inlet 34 both in communication with the containing space B2, the air outlet 33 is located on the side facing the high-speed motor A, the air outlet 33 is in communication with the cooling air inlet, and the air inlet 34 is in communication with the cooling air outlet 3 through a pipeline 35.

[0051] It should be noted that the high-speed motor A can output higher power in a smaller volume, and the power density is greatly improved. The gas turbine B is in driving connection with the high-speed motor A, and the high-speed motor A is directly driven by the gas turbine B to generate power, which reduces the intermediate gear transmission device, simplifies the system structure, and improves the system stability. In view of the small size and high temperature rise of the high-speed motor A, most of the high-speed motors A currently use rotor ventilation cooling measures, and a special cooling system needs to be provided for the high-speed motor A, which not only needs additional space to install the cooling equipment, but also increases the complexity and cost of the system. In order to solve the above problems, the present application provides a high-speed motor A cooling system which is suitable for the high-speed motor A of the gas turbine B, and the cooling air for cooling the high-speed motor A is introduced from the side of the gas turbine B. The high-speed motor A has a cooling air inlet and a cooling air outlet 3 both in communication with the mounting space A1, the cooling air outlet 3 is located on the side facing the gas turbine B, and the cooling air inlet is located on the side away from the gas turbine B, and a cooling channel for the cooling air to flow through is formed from the cooling air inlet to the cooling air outlet 3, the gas turbine B has an air outlet 33 and an air inlet 34 both in communication with the containing space B2, the air outlet 33 is located on the side facing the high-speed motor A, the air outlet 33 is in communication with the cooling air inlet, and the air inlet 34 is in communication with the cooling air outlet 3 through a pipeline 35. The cooling air flows from the air outlet 33 of the gas turbine B to the cooling air inlet in the high-speed motor A through the pipeline 35 and enters the mounting space A1 in the high-speed motor A, the cooling air in the cooling channel of the high-speed motor A flows out from the cooling air outlet 3 to the air outlet 33 of the gas turbine B, and then the cooling air after the high-speed motor A enters the containing space B2 of the gas turbine B, which reduces the equipment in the whole system and improves the integration of the whole system.

[0052] The specific structure of the high-speed motor A and the gas turbine B will be described in detail below. Figures 2-4

[0053] As​Figure 2 shown and taken in conjunction with Figure 3 For the convenience of understanding, the side of the high-speed motor A close to the gas turbine B is taken as the front end, and the side of the high-speed motor A away from the gas turbine B is taken as the rear end.

[0054] Specifically, the high-speed motor A includes the main shaft 14 located in the installation space A1;

[0055] The gas turbine B includes the gas turbine shaft 32 located in the containing space B2, the compressor 29 arranged at one end of the gas turbine shaft 32, and the turbine 31 sleeved at the end of the gas turbine shaft 32 away from the compressor 29; the combustion chamber 30 is arranged on the shell B1 of the gas turbine B; wherein one end of the main shaft 14 is in driving connection with the end of the gas turbine shaft 32 close to the compressor 29.

[0056] That is, the turbine 31 in the gas turbine B works to drive the compressor 29 to rotate, so that the cooling wind in the containing space B2 flows from the air outlet 33 to the cooling wind inlet through the pipeline 35, in order to ensure that the cooling wind will not backflow and affect the cooling wind inlet amount of the cooling wind from the cooling wind inlet, a one-way valve 22 is arranged at the cooling wind inlet, which only allows the cooling wind to enter the high-speed motor A.

[0057] The high-speed motor A is directly driven by the gas turbine B to generate electricity, that is, the gas turbine shaft 32 of the gas turbine B is directly connected with the main shaft 14 of the high-speed motor A through the shaft coupling 28, reducing the intermediate gear transmission device, and the high-speed motor A can output higher power in a smaller volume, realizing a substantial increase in power density.

[0058] For the convenience of understanding, as shown in Figures 5-7 The cooling channel includes a first cooling channel, a second cooling channel and a third cooling channel. Specifically, the gap 25 formed between the stator 12 and the rotor magnetic steel assembly 13 serves as the first cooling channel; the main shaft axial ventilation hole 20 serves as the second cooling channel; and the axial ventilation duct 21 arranged on the casing 26 along the extension direction of the main shaft 14 serves as the third cooling channel.

[0059] Continuing to refer to Figure 3 The high-speed motor A further includes: the rotor magnetic steel assembly 13 sleeved on the main shaft 14;

[0060] The stator 12 located in the installation space A1 has a mounting hole, the rotor magnetic steel assembly 13 is located in the mounting hole, and the side wall of the stator 12 away from the mounting hole is connected with the inner wall of the casing 26; a gap is formed between the stator 12 and the rotor magnetic steel assembly 13, and the first cooling channel is formed from the cooling wind inlet to the cooling wind outlet 3 through the gap 25.

[0061] In some specific embodiments, the stator 12 is fixed relative to the casing 26, the rotor magnet assembly 13 rotates with the main shaft 14 relative to the stator 12, and a gap 25 is formed between the stator 12 and the rotor magnet assembly 13 to allow cooling air to flow through, the cooling air flows through the gap 25 between the stator 12 and the rotor magnet assembly 13 to cool the stator 12 and the rotor magnet assembly 13, thereby ensuring the temperature of the core components of the high-speed motor A.

[0062] In some specific embodiments, the main shaft axial vent holes 20 are formed in the main shaft 14 along the length direction of the main shaft 14;

[0063] The second cooling channel is formed from the cooling air inlet to the cooling air outlet 3 through the main shaft axial vent holes 20.

[0064] Specifically, the main shaft axial vent holes 20 are specifically described with reference to Figure 4 The cooling air enters the main shaft axial vent holes 20 from the gap between the rear pull rod 18 and the main shaft 14, and the main shaft axial vent holes 20 are not arranged along the axial direction of the main shaft 14 in order not to affect the strength of the main shaft 14, so that the cooling effect of the main shaft 14 is achieved while the strength of the main shaft 14 is ensured.

[0065] In some specific embodiments, the casing 26 is provided with the axial vent passages 21 arranged along the extension direction of the main shaft 14;

[0066] The third cooling channel is formed from the cooling air inlet to the cooling air outlet 3 through the axial vent passages 21.

[0067] When the cooling air flows through the third cooling channel, the cooling air achieves the heat dissipation of the stator 12, thereby ensuring the heat dissipation effect of the high-speed motor A as a whole.

[0068] Continuing to refer to Figure 3 The high-speed motor A further comprises: the front shaft head 6, the front pull rod 7, the rear shaft head 19, and the rear pull rod 18, which are arranged along the extension direction of the main shaft 14;

[0069] The end of the main shaft 14 towards the coupling 28 is connected to the front shaft head 6 through the front pull rod 7, and the front shaft head 6 is connected to the coupling 28.

[0070] The end of the main shaft 14 away from the coupling 28 is connected to the rear shaft head 19 through the rear pull rod 18.

[0071] The high-speed motor A further comprises: the front bearing seat 2, the front bearing sleeve 4, the front radial floating bearing, the rear bearing seat 15, the rear bearing sleeve 16, and the rear radial floating bearing, which are arranged along the extension direction of the main shaft 14.

[0072] The front radial floating bearing sleeve is arranged on the front shaft head 6, the front bearing sleeve 4 is arranged on the front radial floating bearing, the front bearing seat 2 is located at one end of the main shaft 14 towards the gas turbine B, the front bearing seat 2 is sleeved on the front bearing sleeve 4, and the outer side of the front bearing sleeve 4 away from the front bearing seat 2 is mounted on the casing 26;

[0073] The rear radial floating bearing sleeve is arranged on the rear shaft head 19, the rear bearing sleeve 16 is arranged on the rear radial floating bearing, the rear bearing seat 15 is located at one end of the main shaft 14 away from the gas turbine B, the rear bearing seat 15 is sleeved on the rear bearing sleeve 16, and the outer side of the rear bearing sleeve 16 away from the rear bearing seat 15 is mounted on the casing 26.

[0074] That is, the front end of the main shaft 14 is detachably connected with the front shaft head 6 through the front pull rod 7, and the front shaft head 6 is relatively fixed with the main shaft 14 through the front locking nut 8, the rear end of the main shaft 14 is detachably connected with the rear shaft head 19 through the rear pull rod 18, and the rear shaft head 19 is relatively fixed with the main shaft 14 through the rear locking nut (not shown in the figure). Continue to refer to Figure 3 , the outer surface of the front shaft head 6 is connected with the front bearing sleeve 4 through the front radial air floating bearing 5, so that the front radial air floating bearing 5 rotates relative to the front bearing seat 2; similarly, the outer surface of the rear shaft head 19 is connected with the rear bearing sleeve 16 through the rear radial air floating bearing 17, so that the rear radial air floating bearing 17 rotates relative to the rear bearing seat 15.

[0075] Specifically, the cooling air outlet 3 is arranged on the front bearing seat 2. The cooling air outlet 3 is directly communicated with the air inlet 34 of the gas turbine B, so that the secondary air after flowing through the high-speed motor A is discharged into the gas turbine B, so as to ensure the discharge of the secondary air.

[0076] Similarly, the cooling air inlet is arranged on the rear bearing seat 15.

[0077] In order to improve the cooling effect of the high-speed motor A provided by the embodiment of the application, the water cooling sleeve 1 is formed on the casing 26, the double sleeve end straight-through pipe joint 23 is arranged on the casing 26, the cooling water is introduced into the water cooling sleeve 1 through the double sleeve end straight-through pipe joint 23, and the water channel 11 is arranged in the water cooling sleeve 1, which is a flow channel for the water used for heat exchange.

[0078] Specifically, the supporting leg 10 is further arranged on the bottom of the casing 26 of the high-speed motor A, and the supporting leg 10 is also arranged on the bottom of the outer shell B1 of the gas turbine B. The lifting ring 24 is arranged on the top of the casing 26 of the high-speed motor A, so as to facilitate the transportation of the high-speed motor A. In order to ensure the sealing performance of the water cooling sleeve 1 on the casing 26 of the high-speed motor A, the sealing groove 27 is further arranged.

[0079] Of course, in order to monitor the working state of the high-speed motor A cooling system provided by the embodiment of the application in real time, a vibration sensor hole 9 for installing a vibration collection element is arranged in the system.

[0080] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application belong to the scope of the claims of the application and their equivalent technologies, the application also intends to include these modifications and variations.

Claims

1. A high-speed motor cooling system, characterized in that, include: A high-speed motor, the high-speed motor including a housing having an installation space; A gas turbine is drivenly connected to the high-speed motor, the gas turbine including a housing having a receiving space; The high-speed motor has a cooling air inlet and a cooling air outlet that are both connected to the installation space. The cooling air outlet is located on the side facing the gas turbine, and the cooling air inlet is located on the side away from the gas turbine. A cooling channel for cooling air circulation is formed from the cooling air inlet to the cooling air outlet. The gas turbine has an air outlet and an air inlet, both of which are connected to the housing space. The air outlet is located on the side facing the high-speed motor. The air outlet is connected to the cooling air inlet, and the air inlet is connected to the cooling air outlet through a pipeline. The high-speed motor includes a main shaft located in the mounting space; The gas turbine includes a gas turbine shaft, a compressor, and a turbine located in the housing space. The compressor is disposed at one end of the gas turbine shaft, and the turbine is sleeved on the end of the gas turbine shaft away from the compressor. One end of the main shaft is connected to the end of the gas turbine shaft near the compressor. The gas turbine shaft and the main shaft are connected by a coupling; The high-speed motor also includes: a front axle head, a front tie rod, a rear axle head, and a rear tie rod, all arranged along the extension direction of the main shaft; The end of the main shaft facing the coupling is connected to the front shaft head via the front tie rod, and the front shaft head is connected to the coupling; The end of the main shaft away from the coupling is connected to the rear shaft head via the rear tie rod; The high-speed motor further includes: a front bearing housing, a front bearing sleeve, a front radial floating bearing, a rear bearing housing, a rear bearing sleeve, and a rear radial floating bearing, all arranged along the extension direction of the main shaft. The front radial floating bearing is sleeved on the front shaft head, the front bearing sleeve is sleeved on the front radial floating bearing, the front bearing housing is located at the end of the main shaft facing the gas turbine, the front bearing housing is sleeved on the front bearing sleeve, and the outer side of the front bearing housing away from the front bearing sleeve is mounted on the housing; The rear radial floating bearing is sleeved on the rear shaft head, the rear bearing sleeve is sleeved on the rear radial floating bearing, the rear bearing housing is located at the end of the main shaft away from the gas turbine, the rear bearing housing is sleeved on the rear bearing sleeve, and the outer side of the rear bearing housing away from the rear bearing sleeve is mounted on the housing. The high-speed motor cooling system also includes a vibration sensor hole for mounting a vibration acquisition unit.

2. The high-speed motor cooling system according to claim 1, characterized in that, The cooling air inlet is equipped with a one-way valve.

3. The high-speed motor cooling system according to claim 2, characterized in that, The high-speed motor further includes: a rotor magnet assembly sleeved on the main shaft; The stator is located within the mounting space and has mounting holes. The rotor magnet assembly is located within the mounting holes, and the side wall of the stator away from the mounting holes is connected to the inner wall of the housing. A gap is formed between the stator and the rotor magnet assembly, and a first cooling channel is formed by the air flowing from the cooling air inlet through the gap to the cooling air outlet.

4. The high-speed motor cooling system according to claim 3, characterized in that, A main shaft axial ventilation hole is formed on the main shaft body along the length direction of the main shaft; The cooling air flows from the cooling air inlet through the axial ventilation hole of the main shaft to the cooling air outlet, forming a second cooling channel.

5. The high-speed motor cooling system according to claim 4, characterized in that, The housing has axial ventilation channels arranged along the extension direction of the main shaft; The cooling air flows from the cooling air inlet through the axial ventilation duct to the cooling air outlet, forming a third cooling channel.

6. The high-speed motor cooling system according to claim 1, characterized in that, The cooling air outlet is located on the front bearing housing.

7. The high-speed motor cooling system according to claim 6, characterized in that, The cooling air inlet is located on the rear bearing housing.

8. The high-speed motor cooling system according to claim 1, characterized in that, The casing is formed with a water-cooling jacket.

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