Motor main shaft for high-power motor

Abstract

The invention discloses a motor main shaft for a high-power motor, which comprises a hollow rotating shaft, a first fixed pipe, a second fixed pipe and a third fixed pipe, and the third fixed pipe is connected with a plurality of spray pipes. According to the motor spindle, heat of the rotating shaft is taken away through flowing of the cooling liquid, when heat dissipation is insufficient, atomized liquid can be sprayed out through the spray pipe and rapidly vaporized through airflow to take away heat, vaporization directly occurs near the rotating shaft, and therefore the cooling effect is better. According to the requirement for the heat dissipation effect, the position of the piston unit can be adjusted, so that the using number of the spray pipes is adjusted, and the evaporation cooling capacity is adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly to a motor spindle for a high-power motor. Background Art

[0002] In applications where electric motors are the primary power source, such as in electric vehicles, they often need to operate continuously for long periods of time at high power. This intense operation generates significant heat within the motor. This heat primarily comes from winding losses, core losses, bearing friction losses, and windage losses.

[0003] Existing motor cooling designs have limitations. They often lack dedicated heat dissipation treatment for the motor shaft. As a key component within the motor, the motor shaft is closely connected to the rotor. Without dedicated heat dissipation measures, the portion of the motor shaft closest to the rotor suffers from insufficient heat dissipation. Heat accumulates in this area, causing it to rapidly heat up, resulting in insufficient cooling for the motor as a whole. This adversely affects not only the performance and service life of the motor shaft itself but also the proper operation of the rotor, threatening the performance and stability of the entire motor. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provide a motor spindle for a high-power motor.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a motor main shaft, comprising a hollow rotating shaft, a first fixed tube, a second fixed tube and a third fixed tube; the first fixed tube comprises two end tubes, a cooling tube and two first conical tubes, and a first end plate is fixed to the end of each end tube; a first bearing and a second bearing are respectively installed between the two end tubes and the rotating shaft; the second fixed tube comprises two second conical tubes, a main tube and an air outlet pipe connected to the second conical tube near the second bearing, the air outlet pipe passes through the first end plate near the second bearing, and the end of the second conical tube near the first bearing is fixed with a second end plate; the third fixed tube passes through the second end plate and is fixedly connected to the first end plate near the first bearing, and a plurality of nozzles are connected to the third fixed tube; the space between the rotating shaft and the first fixed tube is a vaporization cooling space The cooling air duct is connected to the cooling air duct by a channel which is formed between the cooling air duct and the cooling air duct, and the channel is connected to the cooling air duct by a channel which is connected to the cooling air duct.

[0006] Furthermore, both ends of the rotating shaft are open.

[0007] Furthermore, transmission components such as gears and synchronous wheels are installed on the rotating shaft, and the rotating shaft has structures such as keys and grooves that cooperate with the gears, synchronous wheels and other components.

[0008] Thereby realizing mechanical transmission.

[0009] Furthermore, the cooling pipe is located between the two end pipes.

[0010] Furthermore, the first frustum-shaped tube connects the end tube and the cooling tube.

[0011] Furthermore, the main pipe is connected to two second frustum-shaped pipes.

[0012] Furthermore, the nozzle passes through the first fixed tube and the second fixed tube.

[0013] The nozzle is thereby used to spray liquid into the vaporizing cooling space.

[0014] Furthermore, the annular shell includes a first annular plate, a second annular plate and a circumferential plate connecting the first annular plate and the second annular plate, the first annular plate and the second annular plate are both fixedly connected to a third fixed pipe, the air inlet pipe is connected to the first annular plate, and one end of the blowing pipe is connected to the second annular plate.

[0015] Furthermore, the first liquid inlet pipe is used to connect to the coolant supply unit, and the liquid outlet pipe is used to connect to the coolant recovery unit.

[0016] Furthermore, the second liquid inlet pipe is used to connect to the vaporized liquid supply unit.

[0017] Furthermore, the air inlet pipe is used to connect to the airflow generating unit, and the air outlet pipe is used to connect to the airflow recovery unit.

[0018] Furthermore, the nozzle has multiple circles distributed at equal intervals, and the nozzles in each circle are distributed in a circular shape at equal intervals; one end of the nozzle is connected to the inner wall of the third fixed tube.

[0019] Thereby, the vaporized liquid is evenly sprayed into the vaporization cooling space.

[0020] Furthermore, an atomizing nozzle is installed at the other end of the nozzle.

[0021] The nozzle thus sprays atomized liquid.

[0022] Furthermore, one end of the third fixed tube close to the second bearing is open, an electric telescopic rod located in the installation space is installed at the fixed plate, and a piston unit located in the third fixed tube is installed at the movable end of the electric telescopic rod.

[0023] Furthermore, when the electric telescopic rod is in its shortest state, all the nozzles are connected to the space between the piston unit in the third fixed tube and the first end plate near the first bearing; when the electric telescopic rod is in its longest state, at least one circle of nozzles is not connected to the space between the piston unit in the third fixed tube and the first end plate near the first bearing.

[0024] Therefore, by adjusting the position of the piston unit, the number of nozzles used can be adjusted to achieve the adjustment of the vaporization cooling capacity.

[0025] Furthermore, an annular baffle is fixed to the first frustum-shaped tube near the second bearing; an annular protrusion is fixed in the rotating shaft between the annular baffle and the second bearing, and a strip-shaped stopper is fixed to the annular protrusion. The rotating shaft also has a plurality of first radial channels and a plurality of second radial channels, one end of the first radial channel is connected to the outer surface of the rotating shaft, and the other end is connected to the inner surface of the rotating shaft. The first radial channel is located between the annular baffle and the cooling tube, and one end of the second radial channel is connected to the outer surface of the rotating shaft, and the other end is connected to the inner surface of the annular protrusion.

[0026] The annular baffle and the strip block allow the airflow containing small droplets to be liquefied and thrown out from the first and second radial channels, thereby preventing water vapor from contacting the second bearing and providing better protection for the second bearing.

[0027] Furthermore, the multiple first radial channels are divided into 2 circles, and the first radial channels in each circle are distributed in a circular shape with equal intervals; the multiple second radial channels are divided into 3 circles, and the second radial channels in each circle are distributed in a circular shape with equal intervals; the diameters of the first radial channels and the second radial channels are less than 2 mm, preferably less than 1 mm.

[0028] In some embodiments, a liquid receiving unit may be provided at the location of the first and second radial channels to receive the liquid droplets ejected from the first and second radial channels to prevent the ejected liquid droplets from affecting other components.

[0029] Furthermore, the ventilation pipes are distributed in a circular shape with equal intervals.

[0030] Furthermore, the blowing pipe passes through the second end plate, the second frustum-shaped tube close to the first bearing, and the first frustum-shaped tube close to the first bearing.

[0031] Furthermore, the first fixed tube is provided with a plurality of strip-shaped heat-conducting fins distributed in an annular shape with equal intervals.

[0032] Therefore, the heat at the rotating shaft is better transferred to the first fixed tube through the strip-shaped heat-conducting fins.

[0033] Furthermore, a first temperature sensor located in the vaporization cooling space is installed on the outer side wall of the first fixed tube.

[0034] Furthermore, a second temperature sensor located in the liquid cooling space is installed on the outer side wall of the second fixed tube.

[0035] Furthermore, there are multiple first temperature sensors distributed in a straight line with equal intervals.

[0036] Furthermore, there are multiple second temperature sensors distributed in a straight line with equal intervals.

[0037] This allows for better control of the cooling method depending on the temperature.

[0038] In some embodiments, no temperature sensor is installed on the motor shaft, and the cooling method is adjusted according to other temperature signals of the system.

[0039] Beneficial effects:

[0040] 1. The motor spindle of the present application removes the heat of the rotating shaft through the flow of coolant. When the heat dissipation is insufficient, a nozzle can be used to spray atomized liquid and the air flow can be used to quickly vaporize it to remove the heat. The vaporization occurs directly near the rotating shaft, so the cooling effect is better.

[0041] 2. The motor spindle of the present application can adjust the position of the piston unit according to the requirements of the heat dissipation effect, thereby adjusting the number of nozzles used to achieve the adjustment of the vaporization cooling capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the motor spindle;

[0043] Figure 2 This is an enlarged view of area A;

[0044] Figure 3 This is an enlarged view of area B;

[0045] Figure 4 This is a cross-sectional view of the motor spindle;

[0046] Figure 5 This is an enlarged view of area C;

[0047] Figure 6 This is an enlarged view of area F;

[0048] Figure 7 This is an enlarged view of area D;

[0049] Figure 8 This is an enlarged view of area E;

[0050] Figure 9 This is an enlarged view of area G;

[0051] Explanation of the reference numerals: rotating shaft 1; first radial channel 1.1; second radial channel 1.2; end pipe 2.1; cooling pipe 2.2; first frustum-shaped pipe 2.3; first end plate 2.4; first bearing 2.5; second bearing 2.6; vaporization cooling space 2.7; liquid cooling space 2.8; first liquid inlet pipe 2.9; liquid outlet pipe 2.10; annular baffle 2.11; annular protrusion 2.12; strip block 2.13; strip heat-conducting fin 2.14; second frustum-shaped pipe 3.1; main pipe 3.2; air outlet pipe 3.3; second end plate 3.4; fixing plate 3.5; ventilation pipe 3.6; electric telescopic rod 3.7; piston unit 3.8; third fixing pipe 4; annular shell 4.1; blowing pipe 4.2; second liquid inlet pipe 4.3; air inlet pipe 4.4; nozzle 5. DETAILED DESCRIPTION

[0052] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0053] The present invention provides a motor spindle for a high-power motor as shown in the figure, comprising a hollow rotating shaft 1, a first fixed tube, a second fixed tube and a third fixed tube 4; the first fixed tube comprises two end tubes 2.1, a cooling tube 2.2 located between the two end tubes 2.1 and two first frustum-shaped tubes 2.3 connecting the end tubes 2.1 and the cooling tubes 2.2, and a first end plate 2.4 is fixed to the end of each end tube 2.1; a first bearing 2.5 and a second bearing 2.6 are respectively installed between the two end tubes 2.1 and the rotating shaft 1; the second fixed tube comprises two second frustum-shaped tubes 3.1, The main pipe 3.2 connecting the two second frustum-shaped tubes 3.1 and the outlet pipe 3.3 connected to the second frustum-shaped tube 3.1 near the second bearing 2.6, the outlet pipe 3.3 passes through the first end plate 2.4 near the second bearing 2.6, and the second end plate 3.4 is fixed to the end of the second frustum-shaped tube 3.1 near the first bearing 2.5; the third fixed pipe 4 passes through the second end plate 3.4 and is fixedly connected to the first end plate 2.4 near the first bearing 2.5, and a plurality of nozzles 5 are connected to the third fixed pipe 4; the space between the rotating shaft 1 and the first fixed pipe is a vaporization cooling air. The space formed between the first fixed tube, the second fixed tube, and the portion of the third fixed tube 4 extending out of the second end plate 3.4 is a liquid cooling space 2.8. The nozzle 5 passes through the first and second fixed tubes and is used to spray liquid into the evaporative cooling space 2.7. An annular shell 4.1 is fixed to the third fixed tube 4. A plurality of blowing pipes 4.2 for blowing air into the evaporative cooling space 2.7 are connected to the annular shell 4.1. A fixing plate 3.5 is fixed in the second fixed tube. The fixing plate 3.5 divides the space in the second fixed tube into an air outlet space and an installation space. A plurality of ventilation pipes 3.6 are connected between the first frustum-shaped tube 2.3 near the second bearing 2.6 and the second frustum-shaped tube 3.1 near the second bearing 2.6. The ventilation pipes 3.6 are used to connect the vaporization cooling space 2.7 and the air outlet space. A first liquid inlet pipe 2.9 communicating with the liquid cooling space 2.8, a second liquid inlet pipe 4.3 communicating with the third fixed pipe 4, and an air inlet pipe 4.4 communicating with the annular shell 4.1 are connected to the first end plate 2.4 near the first bearing 2.5. A liquid outlet pipe 2.10 communicating with the liquid cooling space 2.8 is connected to the first end plate 2.4 near the second bearing 2.6.

[0054] The nozzles 5 comprise multiple equally spaced rings, each ring of nozzles 5 arranged in a circular pattern. One end of each nozzle 5 communicates with the inner wall of the third fixed tube 4; an atomizing nozzle is mounted on the other end. The third fixed tube 4, near the second bearing 2.6, is open at one end. An electric telescopic rod 3.7 is mounted on the fixed plate 3.5, located within the mounting space. A piston unit 3.8 is mounted on the movable end of the electric telescopic rod 3.7, located within the third fixed tube 4. When the electric telescopic rod 3.7 is at its shortest position, all nozzles 5 communicate with the space between the piston unit 3.8 in the third fixed tube 4 and the first end plate 2.4 near the first bearing 2.5. When the electric telescopic rod 3.7 is at its longest position, at least one ring of nozzles 5 is disconnected from the space between the piston unit 3.8 in the third fixed tube 4 and the first end plate 2.4 near the first bearing 2.5. An annular baffle 2.11 is fixed to the first frustum-shaped tube 2.3 near the second bearing 2.6; an annular protrusion 2.12 is fixed in the rotating shaft 1 between the annular baffle 2.11 and the second bearing 2.6, and a strip-shaped stopper 2.13 is fixed to the annular protrusion 2.12. The rotating shaft 1 also has a plurality of first radial channels 1.1 and a plurality of second radial channels 1.2. One end of the first radial channel 1.1 is connected to the outer surface of the rotating shaft 1, and the other end is connected to the inner surface of the rotating shaft 1. The first radial channel 1.1 is located between the annular baffle 2.11 and the cooling tube 2.2. One end of the second radial channel 1.2 is connected to the outer surface of the rotating shaft 1, and the other end is connected to the inner surface of the annular protrusion 2.12.

[0055] The multiple first radial channels 1.1 are arranged in two circles, with the first radial channels 1.1 in each circle distributed in an annular pattern with equal spacing. The multiple second radial channels 1.2 are arranged in three circles, with the second radial channels 1.2 in each circle distributed in an annular pattern with equal spacing. The diameters of the first radial channels 1.1 and the second radial channels 1.2 are less than 2 mm. The ventilation pipes 3.6 are distributed in an annular pattern with equal spacing. The blowing pipes 4.2 pass through the second end plate 3.4, the second frustum-shaped tube 3.1 near the first bearing 2.5, and the first frustum-shaped tube 2.3 near the first bearing 2.5. The first fixed tube has multiple strip-shaped heat-conducting fins 2.14 distributed in an annular pattern with equal spacing. A first temperature sensor located in the vaporization cooling space 2.7 is mounted on the outer wall of the first fixed tube; a second temperature sensor located in the liquid cooling space 2.8 is mounted on the outer wall of the second fixed tube.

[0056] Working principle: The motor main shaft of the present application includes a rotating shaft, which is used for transmission. A rotor is installed on the rotating shaft, and the rotating shaft is connected to the motor housing through a bearing. A driving gear or other driving mechanism can be installed on the rotating shaft to realize mechanical transmission.

[0057] The first, second, and third fixed tubes are fixed, and the first liquid inlet tube can be used to supply coolant, so that the coolant can pass through the space between the first and second fixed tubes, so that the heat of the rotating shaft can be transferred to the first fixed tube through the strip-shaped heat-conducting fins, and then be carried away by the flowing coolant. Since the coolant does not directly contact the rotating shaft, the influence of the flowing liquid on the rotation of the rotating shaft is avoided. When the heat dissipation effect of the coolant alone is insufficient, a nozzle can be used to spray liquid to spray out atomized liquid, and the air inlet tube is used to enter the air flow, and the air outlet tube is used to recover the air flow. After the atomized liquid is sprayed, it can be quickly vaporized under the heat of the rotating shaft and the blowing of the air flow, thereby carrying away the heat at the rotating shaft. Since the vaporization occurs in the space between the rotating shaft and the first fixed tube, the heat at the rotating shaft is directly carried away, thereby achieving a better cooling effect. And according to the requirements of the heat dissipation effect, the position of the piston unit can be adjusted, so that when the electric telescopic rod is in a longer state, a part of the nozzle can be put into an unused state, or the electric telescopic rod can be put into a shorter state, so that more nozzles can be put into use. Therefore, during vapor cooling, the cooling capacity can be adjusted.

[0058] When the airflow reaches a position close to the second bearing, it will pass through the ventilation duct and be discharged from the air outlet duct. If a small amount of airflow (which may contain a small amount of droplets) does not flow out of the ventilation duct, it can be blocked by the annular baffle, resulting in liquefaction, and under the action of the centrifugal force of the rotating shaft, it can be thrown out from the first radial channel. Some airflow will pass over the annular baffle and enter the strip-shaped block (the strip-shaped block is multi-circular and densely staggered) on the annular protrusion, where it can also be liquefied and thrown out by the centrifugal force of the rotating shaft and thrown out from the second radial channel (the first radial channel and the second radial channel are located outside the motor housing, and the amount thrown out is very small, which will not have an adverse effect on the motor itself and the system in which it is located), thereby preventing water vapor from contacting the second bearing and providing better protection for the second bearing.

[0059] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A motor spindle for a high-power motor, characterized in that: The cooling tube has a first end portion and a second end portion, and the cooling tube has a second end portion, and the cooling tube has a second end portion. The cooling tube has a second end portion, and the cooling tube has a second end portion. and a cooling fan connected to the annular shell and the cooling fan connected to the annular shell. The cooling fan is connected to the cooling fan by a channel configured to connect the cooling fan to the cooling fan. The cooling fan is connected to the cooling fan by a channel configured to connect the cooling fan to the cooling fan.

2. The motor spindle for a high-power motor according to claim 1, characterized in that: The nozzle has multiple circles distributed at equal intervals, and the nozzles in each circle are distributed in a circular shape with equal intervals; one end of the nozzle is connected to the inner wall of the third fixed tube; and the other end of the nozzle is equipped with an atomizing nozzle.

3. The motor spindle for a high-power motor according to claim 2, characterized in that: One end of the third fixed tube near the second bearing is open, and an electric telescopic rod located in the installation space is installed on the fixed plate. The movable end of the electric telescopic rod is installed with a piston unit located in the third fixed tube. When the electric telescopic rod is in its shortest state, all the nozzles are connected to the space between the piston unit in the third fixed tube and the first end plate near the first bearing. When the electric telescopic rod is in its longest state, at least one circle of nozzles is not connected to the space between the piston unit in the third fixed tube and the first end plate near the first bearing.

4. The motor spindle for a high-power motor according to claim 1, characterized in that: An annular baffle is fixed to the first frustum-shaped tube near the second bearing; an annular protrusion is fixed in the rotating shaft between the annular baffle and the second bearing, and a strip-shaped stopper is fixed to the annular protrusion. The rotating shaft also has a plurality of first radial channels and a plurality of second radial channels, one end of the first radial channel is connected to the outer surface of the rotating shaft, and the other end is connected to the inner surface of the rotating shaft. The first radial channel is located between the annular baffle and the cooling tube, one end of the second radial channel is connected to the outer surface of the rotating shaft, and the other end is connected to the inner surface of the annular protrusion.

5. The motor spindle for a high-power motor according to claim 4, characterized in that: The multiple first radial channels are divided into 2 circles, and the first radial channels in each circle are distributed in a circular shape with equal spacing; the multiple second radial channels are divided into 3 circles, and the second radial channels in each circle are distributed in a circular shape with equal spacing; the diameters of the first radial channels and the second radial channels are less than 2 mm.

6. The motor spindle for a high-power motor according to claim 1, characterized in that: The ventilation pipes are distributed in a circular shape with equal intervals.

7. The motor spindle for a high-power motor according to claim 1, characterized in that: The blowing pipe passes through the second end plate, the second frustum-shaped pipe close to the first bearing, and the first frustum-shaped pipe close to the first bearing.

8. The motor spindle for a high-power motor according to claim 1, characterized in that: The first fixed tube is provided with a plurality of strip-shaped heat-conducting fins distributed in an annular shape with equal intervals.

9. The motor spindle for a high-power motor according to claim 1, characterized in that: A first temperature sensor located in the vaporization cooling space is installed on the outer side wall of the first fixed tube; a second temperature sensor located in the liquid cooling space is installed on the outer side wall of the second fixed tube.

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