An inner stator of a motor suitable for evaporative cooling

Abstract

The present technology discloses an internal stator of a motor suitable for evaporative cooling, comprising a stator core, a liquid inlet end ring, an air outlet end ring, a carbon fiber sleeve and a rotating shaft, wherein the carbon fiber sleeve is tightly fitted to the outer edge of the stator core, the front end of the carbon fiber sleeve is sealed and connected to the outer edge of the liquid inlet end ring, the rear end of the carbon fiber sleeve is sealed and connected to the outer edge of the air outlet end ring, the rotating shaft is connected to the inner hole in the middle of the stator core, the front end of the rotating shaft passes through the liquid inlet end ring and the rotating shaft is sealed and connected to the liquid inlet end ring, the rear end of the rotating shaft passes through the air outlet end ring and the rotating shaft is sealed and connected to the air outlet end ring, the space enclosed by the carbon fiber sleeve, the liquid inlet end ring, the air outlet end ring and the rotating shaft is a stator cavity, the front end of the rotating shaft is a hollow structure to form a liquid inlet end, the rear end of the rotating shaft is a hollow structure to form an air outlet end; and a plurality of axial hollow channel grooves are provided on the stator core. The present technology has the advantages of simple structure, strong versatility, low cost, high production efficiency and good heat dissipation effect.

Description

Technical Field

[0001] The present technology belongs to the field of motor cooling, and specifically relates to an inner stator of a motor suitable for evaporative cooling. Background Art

[0002] According to the position of the stator, the motor can be divided into an outer stator and an inner stator structure. At present, the structure adopted by most industrial motors is the stator is on the outside and the rotor is on the inside. The outer rotor and inner stator motor mentioned in this technology is different from the conventional structure. The stator is inside and the rotor is outside. It mainly responds to some unconventional electronic mechanical technical requirements. The losses during the use of the motor include copper loss, iron loss, stray loss, etc. Among them, copper loss and most of the iron loss are located on the stator side. This inner stator motor structure causes the heat dissipation area of ​​the motor stator to be smaller than that of the outer stator structure, and the heat inside the motor is not easy to dissipate. Once the heat accumulates in the motor, if it cannot be taken away in time and effectively, it will inevitably cause the temperature inside the motor to rise. Therefore, effective cooling plays a vital role in the safe operation, reliability and service life of the motor.

[0003] At present, the inner stator of the outer rotor motor is generally cooled by air and water. The water cooling structure generally uses a hole in the middle of the shaft. There are generally two ways, single-end water inlet and outlet or double-end water inlet and outlet. The water cooling method is much better than the air cooling method. However, with the increase in the power demand of the motor and the reduction in the size of the motor, the effective heat dissipation area is insufficient, and the water cooling method is gradually facing the bottleneck of efficiency.

[0004] Motor evaporative cooling technology is a new and efficient cooling technology that uses highly insulating, low-boiling-point organic working fluids to cool heat-generating components through phase change heat transfer. Its working principle is to introduce a cooling liquid medium into the motor to absorb the heat of the heat-generating object. The liquid medium absorbs heat and vaporizes, turning into a gas-liquid mixture, which is then led out of the motor and into the condenser. In the condenser, the evaporative cooling medium transfers heat to the cooling water and condenses into liquid, which then returns to the motor for the next round of heat absorption.

[0005] The general motor evaporative cooling system adopts the overall immersion type. The overall immersion type has the technical difficulty of sealing, and the resistance of the rotor in the coolant is much greater than that of the air, which increases the power loss of the motor. Designing the motor rotor and stator into separate evaporative cooling sealed cavities increases the structural complexity and the cost is relatively high. Since the outer rotor motor has a larger contact area with the air, it is more suitable for air cooling. Therefore, it is very important to provide an evaporative cooling system for the stator of an outer rotor motor. Summary of the invention

[0006] The technical problem to be solved by the present technology is to provide an inner stator of a motor suitable for evaporative cooling in view of the deficiencies of the above-mentioned prior art. The inner stator of a motor suitable for evaporative cooling has the advantages of simple structure, strong versatility, low cost, high production efficiency and good heat dissipation effect.

[0007] In order to achieve the above technical objectives, the technical solution adopted by this technology is:

[0008] A motor inner stator suitable for evaporative cooling comprises a stator core, a liquid inlet end ring, an air outlet end ring, a carbon fiber sleeve and a rotating shaft, wherein the carbon fiber sleeve is tightly fitted to the outer edge of the stator core, the front end of the carbon fiber sleeve is sealed and connected to the outer edge of the liquid inlet end ring, the rear end of the carbon fiber sleeve is sealed and connected to the outer edge of the air outlet end ring, the rotating shaft is connected to the inner hole in the middle of the stator core, the front end of the rotating shaft passes through the liquid inlet end ring and the rotating shaft is sealed and connected to the liquid inlet end ring, the rear end of the rotating shaft passes through the air outlet end ring and the rotating shaft is sealed and connected to the air outlet end ring, the carbon fiber sleeve, The space enclosed by the liquid inlet end ring, the air outlet end ring and the rotating shaft is the stator cavity, the front end of the rotating shaft is a hollow structure to form a liquid inlet end, the rear end of the rotating shaft is a hollow structure to form an air outlet end, a plurality of openings are provided on the rotating shaft near the liquid inlet end ring in the stator cavity, and the openings are connected with the liquid inlet end, an air guide channel is provided on the rotating shaft near the air outlet end ring in the stator cavity, and the air guide channel is connected with the air outlet end, and the air guide channel extends vertically upward; a plurality of axial hollow channel grooves are provided on the stator core, and each axial hollow channel groove is connected with the stator cavity.

[0009] As a further improvement of the present technology, the carbon fiber sleeve is tightly fitted to the outer edge of the stator core by interference fit;

[0010] The front end of the carbon fiber sleeve is tightly fitted with the outer edge of the liquid inlet end ring by interference fit, and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is provided in the sealing groove;

[0011] The rear end of the carbon fiber sleeve is tightly fitted with the outer edge of the air outlet end ring by interference fit, and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is arranged in the sealing groove.

[0012] As a further improved solution of the present technology, the rotating shaft is fixedly connected to the inner hole in the middle of the stator core by interference fit;

[0013] The rotating shaft is tightly fitted with the end ring of the liquid inlet end and a sealing groove is provided on the fitting surface of the two, and a sealing ring is provided in the sealing groove;

[0014] The rotating shaft is tightly fitted with the air outlet end ring and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is arranged in the sealing groove.

[0015] As a further improvement of the present technology, a winding coil is provided on the stator core, and a lead-out wire port connected to the liquid inlet end is provided at the front end of the rotating shaft. The lead-out wire of the winding coil passes through the opening on the rotating shaft, the liquid inlet end and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire of the winding coil is sealed and connected to the lead-out wire port.

[0016] As a further improvement of the present technology, a winding coil is provided on the stator core, and a lead-out wire port connected to the air outlet end is provided at the rear end of the rotating shaft. The lead-out wire of the winding coil passes through the opening on the rotating shaft, the air outlet end and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire of the winding coil is sealed and connected to the lead-out wire port.

[0017] In order to achieve the above technical purpose, another technical solution adopted by this technology is:

[0018] A motor internal stator suitable for evaporative cooling, comprising a stator core, a liquid inlet end ring, an air outlet end ring, a carbon fiber sleeve and a rotating shaft, wherein the carbon fiber sleeve is tightly fitted to the outer edge of the stator core, the lower end of the carbon fiber sleeve is sealed and connected to the outer edge of the liquid inlet end ring, the upper end of the carbon fiber sleeve is sealed and connected to the outer edge of the air outlet end ring, the rotating shaft is connected to the inner hole in the middle of the stator core, the lower end of the rotating shaft passes through the liquid inlet end ring and the rotating shaft is sealed and connected to the liquid inlet end ring, the upper end of the rotating shaft passes through the air outlet end ring and the rotating shaft is sealed and connected to the air outlet end ring, the carbon fiber sleeve, the liquid inlet end ring, the air outlet end ring The space enclosed between the ring and the rotating shaft is the stator cavity, the lower end of the rotating shaft is a hollow structure to form a liquid inlet end, the upper end of the rotating shaft is a hollow structure to form an air outlet end, a plurality of openings are provided on the rotating shaft near the end ring of the liquid inlet end in the stator cavity, and the openings are connected with the liquid inlet end, a plurality of openings are provided on the rotating shaft near the end ring of the air outlet end in the stator cavity, and the openings are connected with the air outlet end, a gap is reserved between the top of the stator core and the bottom of the end ring of the air outlet end, and the gap is a gaseous medium space; a plurality of axial hollow channel grooves are provided on the stator core, and each axial hollow channel groove is connected with the stator cavity.

[0019] As a further improvement of the present technology, the carbon fiber sleeve is tightly fitted to the outer edge of the stator core by interference fit;

[0020] The lower end of the carbon fiber sleeve is tightly fitted with the outer edge of the liquid inlet end ring by interference fit, and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is provided in the sealing groove;

[0021] The upper end of the carbon fiber sleeve is tightly fitted with the outer edge of the air outlet end ring by interference fit, and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is provided in the sealing groove.

[0022] As a further improved solution of the present technology, the rotating shaft is fixedly connected to the inner hole in the middle of the stator core by interference fit;

[0023] The rotating shaft is tightly fitted with the end ring of the liquid inlet end and a sealing groove is provided on the fitting surface of the two, and a sealing ring is provided in the sealing groove;

[0024] The rotating shaft is tightly fitted with the air outlet end ring and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is arranged in the sealing groove.

[0025] As a further improvement of the present technology, a winding coil is provided on the stator core, and a lead-out wire port connected to the liquid inlet end is provided at the lower end of the rotating shaft. The lead-out wire of the winding coil passes through the opening on the rotating shaft, the liquid inlet end and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire of the winding coil is sealed and connected to the lead-out wire port.

[0026] As a further improvement of the present technology, a winding coil is provided on the stator core, and a lead-out wire port connected to the air outlet end is provided at the upper end of the rotating shaft. The lead-out wire of the winding coil passes through the opening on the rotating shaft, the air outlet end and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire of the winding coil is sealed and connected to the lead-out wire port.

[0027] The beneficial effects of this technology are:

[0028] In order to achieve better heat absorption and heat removal effect of evaporative cooling, the stator cavity of the motor stator adopts a closed structure. The entire winding coil and the stator core are completely immersed in the coolant, and a gas medium space is reserved at the top or an air guide channel is set at the rear end. According to the different ways of placing the motor, it is divided into two types of internal stator structures: horizontal and vertical shaft design. The main difference lies in the design of the guide channel for the vapor coolant. The overall structure is simple, versatile, low cost, high production efficiency, and good heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of Example 1.

[0030] Figure 2 This is a schematic diagram of the structure of Example 2. DETAILED DESCRIPTION

[0031] The specific implementation of the present technology is further described below according to the accompanying drawings:

[0032] The motor evaporative cooling system includes steps and devices such as heat absorption, drainage, steam collection, condensation, liquid return, and liquid collection. This technology only discusses the stator assembly of the inner stator motor in the evaporative cooling system. In order to achieve better heat absorption and heat dissipation effects of evaporative cooling, the inner stator of the motor adopts a closed structure. The entire winding and the stator core are completely immersed in the coolant, and a gaseous medium space is reserved at the top. According to the different ways of placing the motor, it is divided into two inner stator structures: the horizontal placement of Example 1 and the vertical shaft design of Example 2. The main difference lies in the design of the guide channel for the gaseous coolant.

[0033] Embodiment 1:

[0034] like Figure 1 As shown, an internal stator of a motor suitable for evaporative cooling comprises a stator core, a liquid inlet end ring 3, an air outlet end ring 8, a carbon fiber sleeve 5 and a rotating shaft 10, wherein 2 is a bearing. The carbon fiber sleeve 5 is tightly fitted with the outer edge of the stator core, the front end of the carbon fiber sleeve 5 is sealedly connected to the outer edge of the liquid inlet end ring 3, the rear end of the carbon fiber sleeve 5 is sealedly connected to the outer edge of the air outlet end ring 8, the rotating shaft 10 is connected to the inner hole in the middle of the stator core, the front end of the rotating shaft 10 passes through the liquid inlet end ring 3 and the rotating shaft 10 is sealedly connected to the liquid inlet end ring 3, the rear end of the rotating shaft 10 passes through the air outlet end ring 8 and the rotating shaft 10 is sealedly connected to the air outlet end ring 8, and the surrounding area between the carbon fiber sleeve 5, the liquid inlet end ring 3, the air outlet end ring 8 and the rotating shaft 10 is sealed. The space is a stator cavity, the front end of the rotating shaft 10 is a hollow structure to form a liquid inlet end 1, the rear end of the rotating shaft 10 is a hollow structure to form an air outlet end, a plurality of openings are provided on the rotating shaft 10 near the end ring 3 of the liquid inlet end in the stator cavity, and the openings are connected with the liquid inlet end 1, an air guide channel 7 is provided on the rotating shaft 10 near the end ring 8 of the air outlet end in the stator cavity, and the air guide channel 7 is connected with the air outlet end, and the air guide channel 7 extends vertically upward; a plurality of axial hollow channel grooves 4 are provided on the stator core, and each axial hollow channel groove 4 is connected with the stator cavity.

[0035] The carbon fiber sleeve 5 is tightly fitted with the outer edge of the stator core by interference fit. The front end of the carbon fiber sleeve 5 is tightly fitted with the outer edge of the liquid inlet end ring 3 by interference fit, and the two fitting surfaces have a sealing groove, and an O-type sealing ring is arranged in the sealing groove. The rear end of the carbon fiber sleeve 5 is tightly fitted with the outer edge of the air outlet end ring 8 by interference fit, and the two fitting surfaces have a sealing groove, and an O-type sealing ring is arranged in the sealing groove.

[0036] The rotating shaft 10 is fixedly connected to the inner hole in the middle of the stator core by interference fit. The rotating shaft 10 is tightly fitted with the liquid inlet end ring 3, and a sealing groove is provided on the fitting surface of the two, and an O-type sealing ring is provided in the sealing groove. The rotating shaft 10 is tightly fitted with the gas outlet end ring 8, and a sealing groove is provided on the fitting surface of the two, and an O-type sealing ring is provided in the sealing groove.

[0037] The stator core is provided with a winding coil 6, and the front end of the rotating shaft 10 is provided with a lead-out wire port connected to the liquid inlet end 1. The lead-out wire 11 of the winding coil 6 passes through the opening on the rotating shaft 10, the liquid inlet end 1 and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire 11 of the winding coil 6 is sealed and connected to the lead-out wire port.

[0038] The cooling medium enters the stator cavity from the liquid inlet end 1 of the rotating shaft 10, and is evenly distributed in the winding coil 6 to absorb heat. The stator core and the winding coil 6 are immersed in the cooling medium. The cooling medium absorbs the heat generated by the stator winding when it works, reaches the boiling point and then vaporizes and floats up. The gaseous medium accumulates in the gaseous medium space at the upper part of the stator cavity and reaches a certain pressure, and then is led out to the gas outlet 9 through the gas guide channel 7 connected to the rotating shaft 10.

[0039] Embodiment 2:

[0040] like Figure 2 As shown, an internal stator of a motor suitable for evaporative cooling comprises a stator core, a liquid inlet end ring 3, an air outlet end ring 8, a carbon fiber sleeve 5 and a rotating shaft 10, wherein the carbon fiber sleeve 5 is tightly fitted to the outer edge of the stator core, the lower end of the carbon fiber sleeve 5 is sealedly connected to the outer edge of the liquid inlet end ring 3, the upper end of the carbon fiber sleeve 5 is sealedly connected to the outer edge of the air outlet end ring 8, the rotating shaft 10 is connected to the inner hole in the middle of the stator core, the lower end of the rotating shaft 10 passes through the liquid inlet end ring 3 and the rotating shaft 10 is sealedly connected to the liquid inlet end ring 3, the upper end of the rotating shaft 10 passes through the air outlet end ring 8 and the rotating shaft 10 is sealedly connected to the air outlet end ring 8, the carbon fiber sleeve 5, the liquid inlet end ring 3, The space enclosed between the outlet end ring 8 and the rotating shaft 10 is the stator cavity, the lower end of the rotating shaft 10 is a hollow structure to form a liquid inlet end 1, the upper end of the rotating shaft 10 is a hollow structure to form an outlet end 9, the rotating shaft 10 is provided with a plurality of openings near the liquid inlet end ring 3 in the stator cavity, and the openings are connected to the liquid inlet end 1, the rotating shaft 10 is provided with a plurality of openings near the outlet end ring 8 in the stator cavity, and the openings are connected to the outlet end 9, there is a gap between the top of the stator core and the bottom of the outlet end ring 8, and the gap is a gaseous medium space 12; a plurality of axial hollow channel grooves 4 are provided on the stator core, and each axial hollow channel groove 4 is connected to the stator cavity.

[0041] The carbon fiber sleeve 5 is tightly fitted with the outer edge of the stator core by interference fit. The lower end of the carbon fiber sleeve 5 is tightly fitted with the outer edge of the liquid inlet end ring 3 by interference fit, and the two fitting surfaces have a sealing groove, and an O-type sealing ring is arranged in the sealing groove. The upper end of the carbon fiber sleeve 5 is tightly fitted with the outer edge of the air outlet end ring 8 by interference fit, and the two fitting surfaces have a sealing groove, and an O-type sealing ring is arranged in the sealing groove.

[0042] The rotating shaft 10 is fixedly connected to the inner hole in the middle of the stator core by interference fit. The rotating shaft 10 is tightly fitted with the liquid inlet end ring 3, and a sealing groove is provided on the fitting surface of the two, and an O-type sealing ring is provided in the sealing groove. The rotating shaft 10 is tightly fitted with the gas outlet end ring 8, and a sealing groove is provided on the fitting surface of the two, and an O-type sealing ring is provided in the sealing groove.

[0043] The stator core is provided with a winding coil 6, and the lower end of the rotating shaft 10 is provided with a lead-out wire port connected to the liquid inlet end 1. The lead-out wire 11 of the winding coil 6 passes through the opening on the rotating shaft 10, the liquid inlet end 1 and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire 11 of the winding coil 6 is sealed and connected to the lead-out wire port.

[0044] The stator winding coil 6 in the motor of the present technology is completely immersed in the stator cavity filled with evaporative cooling medium, and the stator cavity is surrounded by the carbon fiber sleeve 5 and the end rings at both ends of the stator (i.e., the liquid inlet end ring 3 and the gas outlet end ring 8). Liquid and gaseous media can enter and exit the sealed space of the stator from the hollow channels at both ends of the rotating shaft 10 (i.e., the liquid inlet end 1 and the gas outlet end 9).

[0045] The liquid medium of this technology can flow freely between the axial hollow channel groove 4 and the end cavity of the stator core. The stator winding and core of the motor transfer heat to the cooling medium, and the cooling medium absorbs heat and vaporizes. Since the density of the gaseous medium is much lower than that of the liquid, the vaporized medium floats in the stator cavity and enters the reserved gaseous medium space 12 at the top, and is led out to the condenser through the outlet end 9 of the rotating shaft 10. The lead wire 11 of the stator winding can be selectively guided to the liquid inlet end 1 or the outlet end 9 of the rotating shaft 10. At the same time, the rotating shaft 10 has a cooling medium inlet and outlet and a lead wire port. The lead-out port of the lead wire 11 (i.e., the lead wire port) adopts a sealing structure to prevent leakage of the cooling medium. This article demonstrates the design of the lead wire 11 leading out of the motor stator from the liquid inlet end 1.

[0046] The carbon fiber sleeve 5 has a series of advantages such as high strength, friction resistance, high temperature resistance, corrosion resistance, and easy processing. It is tightly fitted with the outer edges of the end rings at both ends of the stator through interference fit. The fitting surface is designed with a sealing ring groove, and the pressure-resistant sealing performance is further improved by using an O-ring. The carbon fiber sleeve 5 is tightly fitted with the outer edge of the stator core, and its thickness is less than the air between the magnetic steel and the outer diameter of the core, which can effectively cut off the friction loss between the stator core and the air. Further extend the service life of the motor.

[0047] The motor shaft 10 is processed to be hollow at both ends, namely the liquid inlet end 1 and the gas outlet end 9. The shaft 10 is fixed to the stator core by interference fit. The shaft 10 fits tightly with the liquid inlet end ring 3 and the gas outlet end ring 8. The fitting surface is also designed with a sealing ring groove and a sealing ring to further achieve the sealing of the stator cavity.

[0048] The cooling medium enters the stator cavity from the liquid inlet end 1 of the rotating shaft 10, and is evenly distributed in the winding coil 6 to absorb heat. The stator core and the coil are immersed in the cooling medium. A gaseous medium space 12 is reserved at the upper part of the stator cavity. The cooling medium absorbs the heat generated by the stator winding when it works, reaches the boiling point and then vaporizes and floats up. The vaporized medium floats in the stator cavity and enters the reserved gaseous medium space 12 at the upper part, and is discharged through the gas outlet end 9 of the rotating shaft 10.

[0049] The above is only a preferred embodiment of the present technology and does not limit the present technology in any form. Technical personnel familiar with the field can make many possible changes and modifications to the present technology by using the above technical content without departing from the scope of the present technology, or modify it into an equivalent embodiment with equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments according to the present technology without departing from the content of the present technology belong to the protection scope of the present technology.

Claims

1. An inner stator of a motor suitable for evaporative cooling, characterized in that: The invention comprises a stator core, a liquid inlet end ring, an air outlet end ring, a carbon fiber sleeve and a rotating shaft, wherein the carbon fiber sleeve is tightly fitted to the outer edge of the stator core, the front end of the carbon fiber sleeve is sealed and connected to the outer edge of the liquid inlet end ring, the rear end of the carbon fiber sleeve is sealed and connected to the outer edge of the air outlet end ring, the rotating shaft is connected to the inner hole in the middle of the stator core, the front end of the rotating shaft passes through the liquid inlet end ring and the rotating shaft is sealed and connected to the liquid inlet end ring, the rear end of the rotating shaft passes through the air outlet end ring and the rotating shaft is sealed and connected to the air outlet end ring, the carbon fiber sleeve, the liquid inlet end ring, the air outlet end ring The space enclosed between the end ring and the rotating shaft is the stator cavity, the front end of the rotating shaft is a hollow structure to form a liquid inlet end, the rear end of the rotating shaft is a hollow structure to form an air outlet end, a plurality of openings are provided on the rotating shaft near the end ring of the liquid inlet end in the stator cavity, and the openings are connected with the liquid inlet end, an air guide channel is provided on the rotating shaft near the end ring of the air outlet end in the stator cavity, and the air guide channel is connected with the air outlet end, and the air guide channel extends vertically upward; a plurality of axial hollow channel grooves are provided on the stator core, and each axial hollow channel groove is connected with the stator cavity.

2. The inner stator of a motor suitable for evaporative cooling according to claim 1, characterized in that: The carbon fiber sleeve is tightly fitted to the outer edge of the stator core by interference fit; The front end of the carbon fiber sleeve is tightly fitted with the outer edge of the liquid inlet end ring by interference fit, and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is provided in the sealing groove; The rear end of the carbon fiber sleeve is tightly fitted with the outer edge of the air outlet end ring by interference fit, and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is arranged in the sealing groove.

3. The inner stator of a motor suitable for evaporative cooling according to claim 2, characterized in that: The rotating shaft is fixedly connected to the inner hole in the middle of the stator core by interference fit; The rotating shaft is tightly fitted with the end ring of the liquid inlet end and a sealing groove is provided on the fitting surface of the two, and a sealing ring is provided in the sealing groove; The rotating shaft is tightly fitted with the air outlet end ring and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is arranged in the sealing groove.

4. The inner stator of a motor suitable for evaporative cooling according to claim 3, characterized in that: The stator core is provided with a winding coil, and the front end of the rotating shaft is provided with a lead-out wire port connected to the liquid inlet end. The lead-out wire of the winding coil passes through the opening on the rotating shaft, the liquid inlet end and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire of the winding coil is sealed and connected to the lead-out wire port.

5. The inner stator of a motor suitable for evaporative cooling according to claim 3, characterized in that: The stator core is provided with a winding coil, and the rear end of the rotating shaft is provided with a lead-out wire port connected to the air outlet end. The lead-out wire of the winding coil passes through the opening on the rotating shaft, the air outlet end and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire of the winding coil is sealed and connected to the lead-out wire port.

6. An inner stator of a motor suitable for evaporative cooling, characterized in that: The invention comprises a stator core, a liquid inlet end ring, an air outlet end ring, a carbon fiber sleeve and a rotating shaft, wherein the carbon fiber sleeve is tightly fitted to the outer edge of the stator core, the lower end of the carbon fiber sleeve is sealed and connected to the outer edge of the liquid inlet end ring, the upper end of the carbon fiber sleeve is sealed and connected to the outer edge of the air outlet end ring, the rotating shaft is connected to the inner hole in the middle of the stator core, the lower end of the rotating shaft passes through the liquid inlet end ring and the rotating shaft is sealed and connected to the liquid inlet end ring, the upper end of the rotating shaft passes through the air outlet end ring and the rotating shaft is sealed and connected to the air outlet end ring, and the surrounding areas between the carbon fiber sleeve, the liquid inlet end ring, the air outlet end ring and the rotating shaft are The space is a stator cavity, the lower end of the rotating shaft is a hollow structure to form a liquid inlet end, the upper end of the rotating shaft is a hollow structure to form an air outlet end, a plurality of openings are provided on the rotating shaft near the end ring of the liquid inlet end in the stator cavity, and the openings are connected with the liquid inlet end, a plurality of openings are provided on the rotating shaft near the end ring of the air outlet end in the stator cavity, and the openings are connected with the air outlet end, a gap is reserved between the top of the stator core and the bottom of the end ring of the air outlet end, and the gap is a gaseous medium space; a plurality of axial hollow channel grooves are provided on the stator core, and each axial hollow channel groove is connected with the stator cavity.

7. The inner stator of a motor suitable for evaporative cooling according to claim 6, characterized in that: The carbon fiber sleeve is tightly fitted to the outer edge of the stator core by interference fit; The lower end of the carbon fiber sleeve is tightly fitted with the outer edge of the liquid inlet end ring by interference fit, and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is provided in the sealing groove; The upper end of the carbon fiber sleeve is tightly fitted with the outer edge of the air outlet end ring by interference fit, and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is provided in the sealing groove.

8. The inner stator of a motor suitable for evaporative cooling according to claim 7, characterized in that: The rotating shaft is fixedly connected to the inner hole in the middle of the stator core by interference fit; The rotating shaft is tightly fitted with the end ring of the liquid inlet end and a sealing groove is provided on the fitting surface of the two, and a sealing ring is provided in the sealing groove; The rotating shaft is tightly fitted with the air outlet end ring and a sealing groove is provided on the fitting surfaces of the two, and a sealing ring is arranged in the sealing groove.

9. The inner stator of a motor suitable for evaporative cooling according to claim 8, characterized in that: The stator core is provided with a winding coil, and the lower end of the rotating shaft is provided with a lead-out wire port connected to the liquid inlet end. The lead-out wire of the winding coil passes through the opening on the rotating shaft, the liquid inlet end and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire of the winding coil is sealed and connected to the lead-out wire port.

10. The inner stator of a motor suitable for evaporative cooling according to claim 8, characterized in that: The stator core is provided with a winding coil, and the upper end of the rotating shaft is provided with a lead-out wire port connected to the air outlet end. The lead-out wire of the winding coil passes through the opening on the rotating shaft, the air outlet end and the lead-out wire port in sequence to be led out of the stator cavity, and the lead-out wire of the winding coil is sealed and connected to the lead-out wire port.

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