TWM570352U - Motor rotor liquid cooling structure - Google Patents

Abstract

This creation belongs to the field of motors, and specifically provides a liquid cooling structure for the rotor of the motor. The motor rotor liquid cooling structure of the present invention comprises a rotating shaft provided with a rotating shaft hole, an end cover for supporting the rotating shaft and a cooling water pipe, one end of the cooling water pipe is connected with the end cover, and the other end of the cooling water pipe extends into the rotating shaft hole. Further, one end of the rotating shaft away from the end cover is provided with a vent hole that communicates with the rotating shaft hole. The motor rotor liquid cooling structure of the present invention enables water to be circulated in the cooling water pipe and indirectly absorbs heat of the rotor by absorbing heat of the cooling water pipe. Therefore, the water in the liquid cooling structure of the rotor of the present invention can always be looped in the cooling water pipe, and does not enter the inside of the motor to cause corrosion and damage to the inside of the motor.

Description

Motor rotor liquid cooling structure

This creation belongs to the field of motors, and specifically provides a liquid cooling structure for the rotor of the motor.

High-power density motors are often accompanied by high temperature rise during operation. To avoid damage to the motor due to overheating of the rotor, a cooling mechanism is usually provided on the rotor to reduce the temperature rise of the rotor of the motor. At present, a blind hole is opened in the motor shaft, and the cooling water is directly contacted with the inner wall of the blind hole of the rotating shaft to absorb the heat of the rotor through the rotating shaft. However, this type of cooling requires a rotating seal to seal the rotor to prevent cooling water from entering the interior of the motor. However, the reliability of the rotary seal is still very problematic at this stage, and it is easy to cause the motor to be damaged due to water leakage.

Accordingly, there is a need in the art for a new rotor cooling structure to address the above problems.

In order to solve the above problems in the prior art, in order to solve the problem that the cooling structure of the motor rotor in the prior art is easy to cause the cooling water to enter the motor to cause damage to the motor, the present invention provides a motor rotor liquid cooling structure, the motor including the machine a housing, an end cover, a stator, a rotor and a rotating shaft, wherein the end cover is provided with a first passage and a second passage, and the rotating shaft is axially disposed with a rotating shaft hole, wherein the motor rotor liquid cooling structure comprises a mounting end fixed to an end of the motor; and a cooling end receivable in the shaft hole, and the cooling end is formed with a cooling passage; wherein the cooling passage passes through the mounting end The first channel and the second channel are in communication.

In a preferred embodiment of the motor rotor liquid cooling structure, the cooling end includes a first pipe and a second pipe sleeved outside the first pipe, and the first pipe is away from the end of the mounting end. The second conduit is in communication, the inner chamber of the first conduit and the annular passage between the first conduit and the second conduit form the cooling passage.

In a preferred embodiment of the motor rotor liquid cooling structure, the mounting end is provided with a first through hole and a second through hole, the first through hole being capable of communicating the inner cavity and the first passage, A second through hole is connectable to the annular cavity and the second passage.

In a preferred embodiment of the motor rotor liquid cooling structure described above, the mounting end is integrally formed with the cooling end.

In a preferred embodiment of the above-described motor rotor liquid cooling structure, a portion of the rotating shaft hole between the second pipe and the rotating shaft hole is filled with a heat conductive medium.

In a preferred embodiment of the motor rotor liquid cooling structure, a vent hole is disposed on the rotating shaft, and the heat conductive medium is filled into the shaft hole through the vent hole.

In a preferred embodiment of the above-described motor rotor liquid cooling structure, the heat transfer medium is a modified eucalyptus oil.

In a preferred embodiment of the motor rotor liquid cooling structure described above, the venting port is provided with a venting valve.

In a preferred embodiment of the motor rotor liquid cooling structure described above, the gas venting valve is a one-way gas permeable valve.

In a preferred embodiment of the motor rotor liquid cooling structure, the motor rotor liquid cooling structure further includes a flow divider, and the mounting end is fixedly connected to the end of the motor through the flow divider.

It can be understood by those skilled in the art that in the preferred technical solution of the present invention, by providing the cooling end of the liquid cooling structure of the motor rotor having the cooling passage in the rotating shaft hole of the rotating shaft, the heat generated by the rotor during the running of the motor can be It is conducted to the cooling end. By fixing the mounting end of the motor rotor liquid cooling structure to the end of the motor, the cooling passage can communicate with the first passage and the second passage on the motor end cover, and the coolant can absorb the heat from the rotating shaft from the rotating shaft. go. Therefore, the coolant (such as water) in the liquid cooling structure of the rotor of the present invention can always be looped in the liquid cooling structure of the motor rotor, and does not enter the inside of the motor to cause corrosion and damage to the inside of the motor.

Further, the modified eucalyptus oil is injected into the shaft hole through the vent hole on the rotating shaft, and the annular cavity between the inner wall of the rotating shaft hole and the outer wall of the cooling end is filled with the modified eucalyptus oil, which can effectively improve the heat exchange between the rotating shaft and the cooling end. The rate increases the heat dissipation speed of the motor rotor and increases the service life of the motor.

Preferred embodiments of the present work are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the scope of protection of the present invention. For example, although the preferred embodiment of the present invention describes the liquid cooling structure of the motor rotor of the present invention by taking the rotor liquid cooling structure of the motor as an example, it is obvious that the motor rotor liquid cooling structure of the present invention can also be applied. Other products with a rotor structure, such as a hydraulic oil pump, can be adjusted as needed by a person skilled in the art to adapt to a specific application, and the adjusted technical solution will still fall within the scope of protection.

It should be noted that in the description of the present creation, the terms "center", "upper", "lower", "left", "right", "vertical", "level", "inside", "outside", etc. The terminology of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is merely for convenience of description, and does not indicate or imply that the device or component must have a specific orientation, constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this creation. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, it should also be noted that in the description of the present invention, the terms "installation", "connected", and "connected" should be understood broadly, unless otherwise clearly defined and limited. For example, it may be a fixed connection or It is a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present creation can be understood on a case-by-case basis.

As shown in FIG. 1, the motor of the present invention mainly includes a casing (not shown), a flow divider 5, a stator (not shown), a rotor 2, and a rotating shaft 3. The motor rotor liquid cooling structure of the present invention mainly comprises a rotating shaft 3, a cooling water pipe 4 and a flow divider 5. The mounting end 43 of the cooling water pipe 4 (the lower end of the cooling water pipe 4 in FIG. 1) is fixedly connected to the flow divider 5, and the cooling end of the cooling water pipe 4 (the upper end portion of the cooling water pipe 4 except the mounting end 43 in FIG. 1) is placed. Inside the shaft 3. Wherein, the shunt 5 is fixedly mounted to the inner side of the end of the casing, such as to the motor end cover 1. Specifically, the lower end of the cooling water pipe 4 (see FIG. 2) in FIG. 1 is fixedly connected to the flow splitter 5, preferably the bolted connection between the cooling water pipe 4 and the flow splitter 5, or any other person skilled in the art may The connection means fixes the cooling water pipe 4 to the flow divider 5, for example welding. In addition to this, those skilled in the art can also integrally form the cooling water pipe 4 and the flow divider 5 into a unitary structure.

Further, as shown in Fig. 1, the lower end of the rotating shaft 3 is provided with a rotating shaft hole 31 in the axial direction, and the upper end of the rotating shaft 3 in Fig. 1 is provided with a venting hole 32. Referring to FIG. 1 and FIG. 2 simultaneously, most of the upper side of the cooling water pipe 4 can extend into the shaft hole 31. In the assembled state, there is a certain gap between the outer wall of the cooling water pipe 4 and the inner wall of the shaft hole 31. Further, a heat transfer medium such as a modified eucalyptus oil is filled into the gap through the vent hole 32 to rapidly transfer heat generated by the rotor 2 during operation of the motor to the cooling water pipe 4, thereby effectively increasing the heat transfer rate. Further, in order to prevent the modified eucalyptus oil in the shaft hole 31 from overflowing from the vent hole 32 during use, the upper end of the vent hole 32 in FIG. 1 is provided with a threaded hole 33 to install a one-way venting valve (not shown) show). Further, the one-way gas venting valve can keep the pressure in the shaft hole 31 and the outside atmospheric pressure always the same, and prevent the modified slag from being pushed out due to the excessive pressure in the shaft hole 31. Among other things, the one-way venting valve can be any form of device structure that can be conceived and implemented by those skilled in the art, such as a bolt having a pinhole in the shaft center.

It should be noted that, under the premise of ensuring the heat conduction rate between the rotating shaft 3 and the cooling water pipe 4, those skilled in the art can appropriately adjust the size of the gap between the inner wall of the rotating shaft 3 and the outer wall of the cooling water pipe 4 as needed, obviously The adjusted technical solution will still fall within the scope of this creation. It should also be noted that those skilled in the art may also use other heat transfer media instead of modified eucalyptus oil, for example, hydraulic oil, under the premise of ensuring sealing property, thermal conductivity, foam resistance and easy filling.

As shown in FIGS. 1 and 2, the cooling water pipe 4 mainly includes a mounting end 43 and a cooling end (the upper end portion of the cooling water pipe 4 in FIG. 1 except the mounting end 43). The mounting end 43 is fixedly connected to the flow divider 5 by bolts, and the cooling end can be completely accommodated in the shaft hole 31 while ensuring a gap between the outer wall of the cooling water pipe 4 and the inner wall of the shaft hole 31. Further, the cooling end includes a first duct 41 and a second duct 42, and the lower ends of the first duct 41 and the second duct 42 are both fixedly coupled to the mounting end 43, preferably, the first duct 41, the second duct 42 and the mounting end 43 is integrally formed, or the first pipe 41 and the second pipe 42 can be fixed to the mounting end 43 by other connection means as needed, for example, the first pipe 41 and the second pipe 42 are screwed or welded. The manner is fixed to the mounting end 43.

As shown in FIG. 1, the first duct 41 is located in the second duct 42, and the upper end of the first duct 41 is in communication with the second duct 42 such that the inner chamber 411 of the first duct 41 and the first duct 41 and the second duct The annular cavity 421 between 42 forms a cooling passage. Further, the person skilled in the art can also provide the annular cavity 421 as a ring cavity of other structure, for example, a spiral ring cavity along the axial direction of the first water pipe 41, as needed.

As shown in FIG. 1, the end cover 1 is provided with a first passage 11 and a second passage 12. The splitter 5 is provided with a first nozzle 51 and a second nozzle 52, and when the splitter 5 is fixed to the end cover 1, the first nozzle 51 can communicate with the first passage 11, and the second nozzle 52 can be connected to the second passage 12 connected. In a possible embodiment, the casing is provided with a spiral cooling passage mainly for cooling the stator and is provided with two openings for the coolant to enter and exit. By connecting the spiral cooling passages with the first passage 11 and the second passage 12 on the end cover 1, it is possible to realize the manner in which the cooling liquid enters the cooling water pipe 4 placed in the rotating shaft while cooling the stator. The coolant is further cooled by the rotating shaft 3. Further, preferably, the shunt 5 is fixedly connected to the end cap 1 by bolts, or the person skilled in the art can also fix the shunt 5 to the end cap 1 by any other and feasible connection means, such as welding. In addition to this, the person skilled in the art can also integrally form the end cap 1 and the flow divider 5 into a unitary structure. It should be understood that in a preferred embodiment of the present invention, the flow splitter 5 is used not only to secure the mounting end 43 of the cooling water pipe 4 to the end cap 1, but also to the first passage 11 and the first end on the end cap 1 The two passages 12 communicate with the inner chamber 411 and the annular chamber 421, respectively, to allow the coolant to flow through the inner chamber 411 and the annular chamber 421.

As shown in FIGS. 1 and 2, the mounting end 43 is provided with a first through hole 431, a second through hole 432, and a mounting hole 433. The first through hole 431 is in communication with the inner cavity 411, and the second through hole 432 is in communication with the annular cavity 421. Moreover, when the mounting end 43 is fixed to the flow divider 5 through the bolt passing through the mounting hole 433, the first through hole 431 communicates with the first nozzle 51, and the second through hole 432 communicates with the second nozzle 52, and further A passage 11 communicates with the inner chamber 411, and the second passage 12 communicates with the annular chamber 412. A coolant (such as water) is allowed to enter the inner cavity 411 from the first passage 11 through the first nozzle 51 and the first through hole 431, and then flows through the annular chamber 421 from the second passage 12 through the second through hole 432 and the second nozzle 52. Flow out. Alternatively, a person skilled in the art can also flow the coolant from the second passage 12 into the cooling passage and out from the first passage 11.

Referring further to Figures 1 and 2, the motor rotor liquid cooling structure of the present invention further includes a first seal ring 6 disposed within the annular groove 434 of the mounting end 43. In the assembled state, the flow splitter 5 and the mounting end 43 can press the first seal ring 6 to prevent the modified eucalyptus oil in the shaft hole 31 from leaking from the joint of the splitter 5 and the mounting end 43. Further, a second sealing ring 7 is disposed between the flow divider 5 and the end cover 1 for preventing the coolant in the first passage 11 and the second passage 12 from entering the inside of the motor to cause damage to electrical components inside the motor. Further, the lower end of the rotating shaft 3 in Fig. 1 is provided with a third sealing ring 8 in the radial direction for preventing the modified sputum oil in the rotating shaft hole 31 from entering the inside of the motor, and the modified sealing ring is preferably a rotary seal.

It will be understood by those skilled in the art that since the sealability of the modified eucalyptus oil is superior to that of water, the modified sputum oil can be effectively sealed by the rotary seal ring between the splitter 5 and the rotating shaft 3. It will also be understood by those skilled in the art that since the modified eucalyptus oil has good dielectric strength, even if the modified eucalyptus oil enters the inside of the motor, it does not cause damage to the motor. It will be readily understood by those skilled in the art that the end cap 1 and the cooling water pipe 4 are connected by the flow divider 5, and the processing of the end cap 1 and the sealing performance between the components can be effectively optimized.

It will also be understood by those skilled in the art that in the preferred embodiment of the present invention, the modified oil between the inner wall of the shaft hole 13 and the outer wall of the cooling water pipe 4 can quickly transfer the heat generated by the rotor to the cooling water pipe. 4. The heat of the cooling water pipe 4 is then carried away by the coolant flowing through the cooling water pipe 4. Therefore, the coolant in the liquid cooling structure of the rotor of the present invention can always be looped in the cooling water pipe 4, and does not enter the inside of the motor to cause corrosion and damage to the inside of the motor.

It should be noted that the cooling liquid described above is preferably water, or other cooling liquids such as hydraulic oil may be used by those skilled in the art as needed.

Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but those skilled in the art will readily understand that the scope of protection of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the spirit of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

1‧‧‧End cover

11‧‧‧First Passage

12‧‧‧second channel

2‧‧‧Rotor

3‧‧‧ shaft

31‧‧‧ shaft hole

32‧‧‧ venting holes

33‧‧‧Threaded holes

4‧‧‧Cooling water pipes

41‧‧‧First pipeline

411‧‧‧ lumen

42‧‧‧Second Pipeline

421‧‧‧Circular cavity

43‧‧‧Installation end

431‧‧‧First through hole

432‧‧‧Second through hole

433‧‧‧ mounting holes

434‧‧‧ring groove

5‧‧‧Splitter

51‧‧‧first nozzle

52‧‧‧Second nozzle

6‧‧‧First seal

7‧‧‧Second seal

8‧‧‧ Third sealing ring

Fig. 1 is a cross-sectional view showing a liquid cooling structure of a rotor of the present embodiment. 2 is a schematic view showing the effect of the cooling water pipe of the motor rotor liquid cooling structure of the present embodiment.

Claims (10)

The utility model relates to a motor rotor liquid cooling structure, which is suitable for a motor, the motor comprises a casing, an end cover, a stator, a rotor and a rotating shaft, wherein the end cover is provided with a first passage and a second passage, and the rotating shaft is arranged with a rotating shaft in the axial direction a hole, the motor liquid cooling structure includes: a mounting end fixed to an end of the motor; and a cooling end receivable in the shaft hole, wherein the cooling end is formed with a cooling passage; wherein the cooling passage passes through the cooling passage The mounting end is in communication with the first passage and the second passage. The motor rotor liquid cooling structure according to claim 1, wherein the cooling end comprises a first pipe and a second pipe sleeved outside the first pipe, and an end of the first pipe away from the mounting end is connected to the second pipe. The inner passage of the first conduit and the annular passage between the first conduit and the second conduit form the cooling passage. The motor rotor liquid cooling structure according to claim 2, wherein the mounting end is provided with a first through hole and a second through hole, the first through hole being capable of communicating the inner cavity and the first passage, the second through hole being capable of Connecting the annular cavity and the second passage. The motor rotor liquid cooling structure according to claim 1, wherein the mounting end is integrally formed with the cooling end. The motor rotor liquid cooling structure according to claim 2, wherein a portion of the rotating shaft hole between the second pipe and the rotating shaft hole is filled with a heat conductive medium. The motor rotor liquid cooling structure according to claim 5, wherein the rotating shaft is provided with a vent hole through which the heat transfer medium is filled. The motor rotor liquid cooling structure according to claim 6, wherein the heat conductive medium is a modified eucalyptus oil. The motor rotor liquid cooling structure according to claim 6, wherein the vent hole is provided with a gas permeable valve. The motor rotor liquid cooling structure according to claim 8, wherein the gas permeable valve is a one-way gas permeable valve. The motor rotor liquid cooling structure according to any one of claims 1 to 9, the motor rotor liquid cooling structure further comprising a flow divider, the mounting end being fixedly connected to the end of the motor through the flow divider.