Adaptive integrated cooling shaft based on centrifugal self-drive

Abstract

The present invention discloses an adaptive integrated cooling shaft based on centrifugal self-drive, which rotates together with the rotor of the motor. The cooling shaft is provided with a cooling shaft cooling channel parallel to its axis. One end of the cooling shaft cooling channel is provided with a liquid inlet, which passes through the cooling shaft. The sidewall of the cooling shaft is provided with a plurality of through slots that are connected to the cooling shaft cooling channel. The through slots and the cooling shaft cooling channel form a closed loop, which is filled with coolant. When the cooling shaft rotates, the centrifugal force of the cooling shaft rotation is used to circulate the coolant. When the motor is working and the cooling shaft rotates, the centrifugal force of the cooling shaft rotation is used to circulate the coolant. No additional drive components are required, the cooling effect is adjustable, the structure is simple, and the versatility is high.

Description

Technical Field

[0001] The present invention relates to the field of motor shaft technology, and more particularly to an adaptive, integrated cooling shaft based on a centrifugal self-drive system. This integrated cooling shaft can also be used in other rotating mechanical equipment (such as inertia wheels, flywheels, large bearings, drive shafts, etc.), reducing the overall complexity of the cooling and drive systems. Background Art

[0002] With the advancement of science and technology, the focus of motor applications has shifted from simple transmission to complex control. At the same time, the operating environment of motors has become increasingly diverse. Traditional motor cooling methods include air cooling and water cooling. Air cooling reduces motor temperature by increasing air flow through the motor. Traditional water cooling requires a cooling pump and a power supply to circulate the coolant. However, in a vacuum environment, where there is no air, air cooling is ineffective. Since there is no convection in a vacuum, only conduction and radiation, cooling a motor in a vacuum is difficult. Traditional water cooling, on the other hand, requires a cooling pump and a power supply to circulate the coolant, which consumes energy and takes up space. This makes a self-driven cooling process impossible.

[0003] In addition to motor shaft cooling, other non-motor rotating machinery, such as inertia wheels, flywheels, large bearings, and drive shafts, also requires cooling in a wide range of applications within the power and energy industries. Typical cooling systems also rely on air and liquid cooling. This typically requires an external, independent drive system, increasing the cost and size of the cooling system. Developing a simpler, more compact, and lower-cost shaft cooling system for these numerous rotating machinery systems in industrial, agricultural, and transportation applications has significant economic and market value. Summary of the Invention

[0004] In order to overcome the above shortcomings, the purpose of the present invention is to provide an adaptive integrated cooling shaft based on centrifugal self-drive, which can utilize the centrifugal force of the cooling shaft to realize the circulation of coolant when the cooling shaft rotates in the working state of the motor or other rotating mechanical equipment (such as a rotating cylinder, inertia wheel, flywheel, large bearing). The cooling shaft not only realizes the function of the rotating shaft, but also realizes self-drive during the coolant circulation process without the need for additional driving parts.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: an adaptive integrated cooling shaft based on centrifugal self-drive, which rotates together with the rotor of the motor, and is characterized in that: a cooling shaft cooling channel parallel to its axis is provided in the cooling shaft, and a liquid inlet is provided at one end of the cooling shaft cooling channel passing through the cooling shaft, and a plurality of through grooves connected to the cooling shaft cooling channel are provided on the side wall of the cooling shaft, and the through grooves and the cooling shaft cooling channel form a closed loop return channel, and the closed loop return channel is filled with coolant, and the circulation of the coolant is realized by centrifugal force when the cooling shaft rotates.

[0006] The beneficial effects of the present invention are as follows: when the closed loop is filled with coolant and the cooling shaft rotates, the coolant in the cooling channel of the cooling shaft is thrown out of the cooling channel into the through groove under the action of centrifugal force, squeezing the coolant into motion. The coolant then returns to the cooling channel of the cooling shaft through the delivery pipe. This closed loop provides the force for the coolant to flow, and the centrifugal force enables the coolant to circulate. During the circulation process, the rotor and the cooling shaft are cooled without the need for additional driving force. The cooling shaft not only functions as a rotating shaft but also achieves self-drive during the coolant circulation process. It has a simple structure and high versatility, making it suitable for a variety of applications.

[0007] Furthermore, a plurality of through slots are evenly arranged along the axial direction of the cooling shaft. The number of the through slots is 3-12 and can be adjusted according to actual conditions. The more through slots there are, the faster the coolant circulates.

[0008] Furthermore, the through groove extends along the radial direction of the cooling axis and is inclined or perpendicular to the axial direction of the cooling axis.

[0009] Furthermore, the cross section of the through groove is circular, and the cross section diameter is 2-20 mm, which can be adjusted according to actual conditions. The larger the cross section diameter, the faster the coolant circulates.

[0010] Furthermore, the cooling shaft is made of beryllium copper material, which has good thermal conductivity and enhances the cooling effect. The cooling shaft is cryogenically treated to provide a better operating state and service life.

[0011] Furthermore, the air gap of the motor is filled with coolant, and the stator of the motor is provided with a stator cooling channel, which corresponds to the through slot. The air gap and the stator cooling channel form a closed loop, and the coolant also flows through the stator cooling channel to cool the stator.

[0012] Furthermore, a centrifugal wheel is fixed to the cooling shaft for co-rotation, and the centrifugal wheel is provided with a centrifugal wheel cooling channel corresponding to the through slot. The centrifugal wheel enhances the centrifugal motion of the coolant, and the size and structure of the centrifugal wheel can be adjusted according to the centrifugal force required.

[0013] Furthermore, the coolant is one of glycerin-type coolant, ethylene glycol-type coolant or deionized water, which has good viscosity-temperature performance and is anti-corrosion and anti-scaling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure of the cooling shaft in the present invention;

[0015] Figure 2 This is a side view of the cooling shaft in the present invention;

[0016] Figure 3 This is a schematic diagram of the cooling shaft application in Example 1 of the present invention;

[0017] Figure 4 This is a schematic diagram of the cooling shaft application in Example 2 of the present invention;

[0018] Figure 5 This is a side view of embodiment 2 of the present invention.

[0019] In the picture:

[0020] 1-housing, 1a-first liquid outlet, 2-stator, 21-air gap, 22-stator cooling channel, 3-rotor, 31-rotor cooling channel, 4-cooling shaft, 41-cooling shaft cooling channel, 411-liquid inlet, 42-through slot, 5-delivery pipe, 6-isolation frame, 7a-first chamber, 7b-second chamber, 8-fixed shell, 81-cavity, 82-second liquid outlet, 9-centrifugal wheel, 91-centrifugal wheel cooling channel. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0022] See attached Figure 1-2As shown, the present invention is an adaptive integrated cooling shaft based on centrifugal self-drive, which is used in a motor and rotates together with the rotor 3 of the motor. The motor includes a housing 1, a stator 2 fixed in the housing 1, a rotor 3 rotatably arranged in the stator 2, and a cooling shaft 4 passing through the rotor 3 and rotating together with the rotor 3. The cooling shaft 4 passes through the housing 1 at both ends, and a bearing is provided between the cooling shaft 4 and the housing 1. A cooling shaft cooling channel 41 is provided in the cooling shaft 4 and is parallel to its axis. The cooling shaft cooling channel 41 is coaxial with the cooling shaft 4. One end of the cooling shaft cooling channel 41 passes through the cooling shaft 4 and is provided with a liquid inlet 411, and the other end is closed and is used to connect to the device to be driven. The side wall of the cooling shaft 4 is provided with a plurality of through grooves 42 that are connected to the cooling shaft cooling channel 41. The through grooves 42 and the cooling shaft cooling channel 41 form a closed loop, and the closed loop is filled with coolant. When the cooling shaft 4 rotates, the centrifugal force realizes the circulation of the coolant. The rotor 3 is provided with a rotor cooling channel 31 connected to the through groove 42. The rotor cooling channel 31 and the liquid inlet 411 are connected through a delivery pipe 5 located outside the shell 1. The delivery pipe 5 is fixed and can be provided with a coolant storage tank connected thereto. The coolant storage tank is filled with coolant.

[0023] The closed loop is filled with coolant. When the cooling shaft 4 rotates, the coolant in the cooling shaft cooling channel 41 is thrown out of the cooling shaft cooling channel 41 and enters the through groove 42 under the action of centrifugal force, squeezing the coolant to move. The coolant then returns to the cooling shaft cooling channel 41 from the delivery pipe 5. This closed loop provides a force for the coolant to flow, and the circulation of the coolant is achieved through centrifugal force. The faster the cooling shaft 4 rotates, the faster the coolant circulates. The rotor 3 and the cooling shaft 4 are cooled during the circulation process without the need for additional driving force. The cooling shaft not only realizes the function of a rotating shaft, but also serves as a driving component in the coolant circulation process. It has a simple structure and high versatility.

[0024] The through slots 42 are evenly arranged along the axial direction of the cooling shaft 4, and the number of the through slots 42 is 3-12. The number of through slots 42 can be 3, 6, 8 or 10 depending on the size of the motor and the size of the cooling shaft. The through slots 42 extend radially along the cooling shaft 4 and are inclined or perpendicular to the axial direction of the cooling shaft 4, which is conducive to the circulation of the coolant. The cross-sectional diameter of the through slots 42 is 2-20 mm and can be adjusted according to actual conditions. The cooling shaft 4 is made of beryllium copper material, which has good thermal conductivity and enhances the cooling effect. The cooling shaft 4 is cryogenically treated to ensure better operating conditions and service life. The coolant is a glycerin-type coolant, an ethylene glycol-type coolant or deionized water, which has good viscosity-temperature performance and is anti-corrosive and anti-scaling.

[0025] Example 1

[0026] See attached Figure 3 As shown, the interior of the housing 1 is a sealed hollow cavity 81 filled with coolant. The stator 2 is secured within the housing 1 via a spacer 6. The spacer 6 divides the hollow cavity into a first chamber 7a and a second chamber 7b located outside the first chamber 7a. The rotor cooling channel 31 extends through the sidewall of the rotor 3 and communicates with the air gap 21 between the rotor 3 and the stator 2. The air gap 21 communicates with the first chamber 7a. The stator 2 is provided with a stator cooling channel 22 connecting the air gap 21 and the second chamber 7b. The housing 1 is provided with a first liquid outlet 1a. One end of the delivery pipe 5 is connected to the first liquid outlet 1a, which communicates with the second chamber 7b. The air gap 21 is filled with coolant, and the liquid in the air gap 21 participates in the coolant circulation. During the circulation process, the coolant also cools the stator 2 through the stator cooling channel 22. The rotor cooling channel 31 corresponds to the through slot 42. The rotor cooling channel 31 extends radially along the rotor 3 and is angled in the same direction as the through slot 42, facilitating the flow of coolant. One end of the delivery pipe 5 is secured to the housing 1, while a bearing seat is positioned between the other end and the liquid inlet 411 on the cooling shaft 4. The delivery pipe 5 is stationary and does not rotate with the cooling shaft 4.

[0027] There are three through grooves 42, which are tilted and have a cross-sectional diameter of 10 mm. The diameter of the liquid inlet 411 is 10 mm, and the diameter of the first liquid outlet 1a is 5 mm. When the motor speed is the rated speed, the flow rate of the coolant is 3 m / s. When the motor is running, the rotor 3 drives the cooling shaft 4 to rotate, and the coolant in the cooling shaft cooling channel 41 of the cooling shaft 4 will have a speed. Due to the action of inertial centrifugal force, the coolant flows from the through groove 42 into the air gap 21. Due to the pressure, the coolant in the air gap 21 will flow into the second chamber 7b along the stator cooling channel 22. The coolant in the second chamber 7b flows out from the first liquid outlet 1a under pressure. The coolant in the delivery pipe 5 is under pressure and flows into the cooling shaft cooling channel 41 from the liquid inlet 411, completing the circulation of the coolant.

[0028] When the rotor 3 of the motor rotates faster, the motor generates more heat. At this time, the flow speed in the cooling channel 41 of the cooling shaft will also increase, the circulation speed of the coolant will become faster, and the cooling effect will be better.

[0029] Example 2

[0030] See attached Figure 4-5As shown, a centrifugal wheel 9 is fixed to the cooling shaft 4 and rotates therewith to enhance centrifugal force. The size and structure of the centrifugal wheel 9 can be designed according to actual needs. The centrifugal wheel 9 is provided with a centrifugal wheel cooling channel 91 connected to the through groove 42. The centrifugal wheel 9 rotates within the fixed shell 8, which is fixed to one end of the housing 1. The interior of the fixed shell 8 is a sealed cavity 81, which is filled with coolant. The centrifugal wheel 9 is sealed to one end of the rotor 3. The centrifugal wheel 9 is provided with a centrifugal wheel cooling channel 91 that connects the rotor cooling channel 31 and the cavity 81, and the centrifugal wheel cooling channel 91 is filled with coolant. The fixed shell 8 is provided with a second liquid outlet 82 connected to the cavity 81, and one end of the delivery pipe 5 is connected to the second liquid outlet 82. The centrifugal wheel 9 enhances the centrifugal motion of the coolant. The rotor cooling channel 31 corresponds to the through slot 42 and is tilted. One end of the rotor cooling channel is located on the inner wall of the rotor 3, and the other end is located on the end surface of the centrifugal wheel 9, which facilitates the circulation of the coolant. The rotor cooling channel 31 connects the rotor cooling channel 31 and the centrifugal wheel cooling channel 91. The centrifugal wheel cooling channel 91 corresponds to the rotor cooling channel 31, extending radially along the centrifugal wheel 9 and tilted relative to the axial direction of the vertical center wheel. The centrifugal wheel cooling channel 91 can also be directly connected to the cooling shaft cooling channel and correspondingly arranged thereto. In this case, the cooling shaft cooling channel is tilted.

[0031] One end of the delivery pipe 5 is fixed to the fixed housing 8. A bearing seat is provided between the delivery pipe 5 and the liquid inlet 411 on the cooling shaft 4. The delivery pipe 5 is stationary and does not rotate with the cooling shaft 4. There are eight through-slots 42, each with a cross-sectional diameter of 2 mm. When the motor is running at its rated speed, the coolant's circulation velocity is 4 m / s.

[0032] At this point, there's no coolant in air gap 21 and it doesn't participate in the coolant circulation. When the motor is running, rotor 3 drives cooling shaft 4 to rotate, and the coolant in cooling shaft cooling channel 41 of cooling shaft 4 experiences a velocity. Due to inertial centrifugal force, the coolant flows from through slot 42 into centrifugal wheel cooling channel 91. After the centrifugal wheel 9 intensifies its centrifugal motion, the coolant in centrifugal wheel cooling channel 91 enters cavity 81. Due to pressure, the coolant in cavity 81 flows out of second liquid outlet 82. The coolant in delivery pipe 5, under pressure, then flows into cooling shaft cooling channel 41 from liquid inlet 411, completing the coolant circulation.

[0033] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. Based on the centrifugal self-driven adaptive integrated cooling shaft, it rotates together with the motor rotor, characterized by: The cooling shaft (4) is provided with a cooling shaft cooling channel (41) parallel to its axis, one end of the cooling shaft cooling channel (41) passes through the cooling shaft (4) and is provided with a liquid inlet (411), the side wall of the cooling shaft (4) is provided with a plurality of through grooves (42) connected to the cooling shaft cooling channel (41), the through grooves (42) and the cooling shaft cooling channel (41) form a closed loop, the closed loop is filled with coolant, and the cooling shaft (4) realizes the circulation of the coolant by centrifugal force when the cooling shaft (4) rotates; The rotor is provided with a rotor cooling channel (31) communicating with the through slot (42), the rotor cooling channel (31) and the liquid inlet (411) being communicated with via a delivery pipe (5) located outside the housing, one end of the delivery pipe being fixedly connected to the housing, and a bearing seat being provided between the other end and the liquid inlet on the cooling shaft; The cooling shaft (4) is made of beryllium copper material.

2. The centrifugal self-driven adaptive integrated cooling shaft according to claim 1, characterized in that: A plurality of through slots (42) are evenly arranged axially along the cooling shaft (4), and the number of the through slots (42) is 3-12.

3. The centrifugal self-driven adaptive integrated cooling shaft according to claim 1, characterized in that: The through groove (42) extends radially along the cooling axis and is inclined or perpendicular to the axial direction of the cooling axis (4).

4. The centrifugal self-driven adaptive integrated cooling shaft according to claim 1, characterized in that: The cross-sectional diameter of the through groove (42) is 2-20 mm.

5. The centrifugal self-driven adaptive integrated cooling shaft according to any one of claims 1 to 4, characterized in that: The air gap (21) of the motor is filled with cooling liquid, and a stator cooling channel (22) is provided on the stator (2) of the motor, and the stator cooling channel (22) is communicated with the through slot (42).

6. The centrifugal self-driven adaptive integrated cooling shaft according to any one of claims 1 to 4, characterized in that: A centrifugal wheel (9) is also fixed to the cooling shaft (4) and rotates together with the cooling shaft. The centrifugal wheel (9) is provided with a centrifugal wheel cooling channel (91) that is in communication with the through groove (42).

7. The centrifugal self-driven adaptive integrated cooling shaft according to claim 1, characterized in that: The coolant is one of glycerin-type coolant, ethylene glycol-type coolant or deionized water.

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