High-temperature-resistant hollow shaft permanent magnet direct drive motor

Abstract

A high-temperature-resistant hollow shaft permanent magnet direct drive motor is suitable for an equipment end with a transmission shaft and comprises a machine base and further comprises a main shaft which is provided with an air inlet channel in the axial direction, the air inlet channel is communicated with the equipment end, the main shaft is covered with a heat insulation mechanism in the circumferential direction of the air inlet channel, and a first bearing is arranged between the non-driving end of the main shaft and the machine base; a second bearing is arranged between the driving end of the main shaft and the base; the driving end of the main shaft is in transmission connection with the transmission shaft; the stator is assembled in the machine base and connected to the inner wall of the machine base; the rotor is arranged on the main shaft in a sleeving manner and is matched with the stator; when high-temperature steam enters the equipment end through the air inlet channel, the heat insulation mechanism isolates heat conduction between the air inlet channel and the interior of the machine base. During application, the structure is simple, assembly and disassembly are convenient, other auxiliary parts are not needed, maintenance is convenient, maintenance time and cost are reduced, the overall cooling effect is guaranteed, and reliability and stability of motor operation are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a high-temperature resistant hollow shaft permanent magnet direct drive motor. Background Technology

[0002] A flotation machine, also known as a flotation mineral processing machine, refers to the mechanical equipment that completes the flotation process. The most commonly used flotation machine is the mechanically agitated flotation machine. Steam is introduced into the agitated tank, creating a high-temperature, high-pressure steam environment inside. The steam contacts the metal walls of the tank, transferring heat energy to the contents, achieving heating, sterilization, and disinfection. Traditional flotation machines often use a multi-stage transmission system with an asynchronous motor, reducer, and pulley. The main shaft cannot be hollow and requires air intake through other pipes.

[0003] In traditional flotation machine systems, a reducer is used between the motor output shaft and the flotation machine main shaft. This makes it inconvenient to introduce high-temperature steam, requires high assembly standards, and often results in poor sealing of the flotation system due to manufacturing and installation errors, leading to leaks and increasing the maintenance time and costs of the equipment. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a high-temperature resistant hollow shaft permanent magnet direct drive motor.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-temperature resistant hollow shaft permanent magnet direct drive motor, suitable for equipment with a hollow drive shaft, including a frame and:

[0007] The main shaft has an air intake channel along its axial direction, the air intake channel is connected to the end of the equipment, the main shaft is covered with a heat insulation mechanism along the circumferential direction of the air intake channel, a first bearing is provided between the non-driving end of the main shaft and the machine base, a second bearing is provided between the driving end of the main shaft and the machine base, and the driving end of the main shaft is connected to the transmission shaft.

[0008] A stator, assembled inside the machine base, the stator being connected to the inner wall of the machine base; and a rotor, the rotor being sleeved on the main shaft and cooperating with the stator;

[0009] When high-temperature steam enters the equipment through the air intake channel, the heat insulation mechanism isolates the heat conduction between the air intake channel and the interior of the base.

[0010] Furthermore, the main shaft includes an outer shaft and an inner shaft nested from the outside in, and the gap between the outer wall of the inner shaft and the inner wall of the outer shaft forms a heat insulation interlayer, and a vacuum is formed in the heat insulation interlayer; or the heat insulation interlayer is filled with heat insulation material.

[0011] Furthermore, a reflective screen is arranged on the outer wall surface of the inner shaft and the inner wall surface of the outer shaft, and the heat insulation interlayer and the reflective screen constitute the heat insulation mechanism.

[0012] Furthermore, the machine base includes a housing, an upper end cover disposed on the top of the housing, and a lower end cover disposed on the bottom of the housing. The first bearing between the upper end cover and the main shaft is a tapered roller bearing; the second bearing between the lower end cover and the main shaft is a self-aligning roller bearing.

[0013] Furthermore, it also includes a connecting device, which is sleeved on the non-drive end of the main shaft. One end of the connecting device is used to communicate with the air source equipment, and the other end of the connecting device is connected to the non-drive end of the main shaft.

[0014] Furthermore, it also includes a coupling located at the drive end of the main shaft, used to connect the drive end of the main shaft to the transmission shaft at the device end.

[0015] Furthermore, it also includes an air-cooling device, which includes: an air shroud disposed on one side of the housing; and a fan disposed on the side of the air shroud and communicating with the air shroud.

[0016] Furthermore, it also includes a water cooling device, which includes a water cooling housing. The water cooling housing has circulating water channels distributed along a spiral direction inside. The outer surface of the water cooling housing is provided with a water inlet and a water outlet, which are respectively connected to the circulating water channels.

[0017] Furthermore, it also includes a junction box for electrical connection, which is disposed on one side of the housing.

[0018] Furthermore, the bottom of the self-aligning roller bearing is provided with a retaining ring, which abuts against the main shaft to limit the offset of the inner ring of the self-aligning roller bearing.

[0019] The beneficial effects of this utility model are:

[0020] 1. The present invention proposes a high-temperature resistant hollow shaft permanent magnet direct drive motor, which eliminates the reducer structure and uses the hollow motor output shaft to undertake the intermediate air ventilation function, and then connects the motor output shaft to the stirring main shaft for air filling.

[0021] 2. The high-temperature resistant hollow shaft permanent magnet direct drive motor proposed in this utility model can effectively reduce the heat generated by high-temperature steam on the motor shaft and transfer it to the internal environment of the motor by setting a heat insulation layer, thereby reducing the temperature rise inside the motor and avoiding the reduction in working efficiency and shortening of life due to high temperature.

[0022] 3. The present invention proposes a high-temperature resistant hollow shaft permanent magnet direct drive motor. The connecting device is in a fixed state when the motor is running, ensuring the safety of motor operation. The connection between the connecting device and the housing assembly is detachable. The connecting device is simple and convenient to process and assemble, reducing operating costs.

[0023] 4. The present invention proposes a high-temperature resistant hollow shaft permanent magnet direct drive motor, wherein a tapered roller bearing is provided in the first bearing chamber between the upper end cover and the main shaft, that is, a tapered roller bearing is provided at the non-drive end of the motor to bear the axial force generated by the weight of the motor and the flotation machine rotor, so as to ensure the safety and reliability of the motor during operation.

[0024] 5. The present invention proposes a high-temperature resistant hollow shaft permanent magnet direct drive motor, wherein a self-aligning roller bearing is provided in the second bearing chamber between the lower end cover and the main shaft, that is, the drive end of the motor is provided with a self-aligning roller bearing to withstand the radial force generated by the swing when the main shaft drives the flotation machine stirring shaft to rotate, so as to ensure the safety and reliability of the operation.

[0025] 6. The present invention proposes a high-temperature resistant hollow shaft permanent magnet direct drive motor with an air-cooling device located on the top of the housing assembly for heat dissipation. Through the forced air-cooling structure, a stable and uniform supply of cooling gas is ensured, thus guaranteeing the overall heat dissipation effect of the motor and ensuring the safe and reliable operation of the motor.

[0026] 7. The present invention proposes a high-temperature resistant hollow shaft permanent magnet direct drive motor, with a coupling located at the drive end of the main shaft. The main shaft is connected to the flotation machine stirring shaft through the coupling, so as to realize the motor driving the main shaft to drive the flotation machine stirring shaft while ensuring the supply of gas required by the flotation machine.

[0027] 8. The present invention proposes a high-temperature resistant hollow shaft permanent magnet direct drive motor, with heat dissipation fins and air cooling device to ensure the overall cooling effect of the motor and ensure its stable and reliable operation performance. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a front view of a high-temperature resistant hollow shaft permanent magnet direct drive motor according to this utility model;

[0030] Figure 2 This is a top view of a high-temperature resistant hollow shaft permanent magnet direct drive motor according to this utility model;

[0031] Figure 3 This is a cross-sectional view of a high-temperature resistant hollow shaft permanent magnet direct drive motor according to this utility model.

[0032] Figure 4 for Figure 3 A magnified view of point A;

[0033] Figure 5 for Figure 3 Enlarged view of point B.

[0034] In the diagram, 101 is the housing; 1011 is the heat dissipation hole; 102 is the upper end cover; 103 is the lower end cover; 20 is the main shaft; 201 is the outer shaft; 202 is the inner shaft; 203 is the air intake channel; 204 is the heat insulation layer; 301 is the stator; 302 is the rotor; 401 is the tapered roller bearing; 402 is the self-aligning roller bearing; 4021 is the retaining ring; 50 is the connecting device; 60 is the coupling; 701 is the fan; 702 is the fan cover; and 80 is the junction box. Detailed Implementation

[0035] The following is combined with Figure 1-5 This utility model will be described in detail.

[0036] A high-temperature resistant hollow shaft permanent magnet direct drive motor, such as Figure 1-3 As shown, this is applicable to the equipment end with a drive shaft, specifically to a flotation machine, including a base, and further including: a main shaft 20, with an air inlet channel 203 along its axial direction, the air inlet channel 203 connecting to the equipment end, a heat insulation mechanism covering the main shaft 20 along the circumferential direction of the air inlet channel 203, a first bearing between the non-drive end of the main shaft 20 and the base, a second bearing between the drive end of the main shaft 20 and the base, the drive end of the main shaft 20 being connected to the drive shaft; a stator 301, assembled inside the base, the stator 301 being connected to the inner wall of the base; and a rotor 302, the rotor 302 being sleeved on the main shaft 20 and cooperating with the stator 301; when high-temperature steam enters the equipment end through the air inlet channel 203, the heat insulation mechanism isolates the heat conduction between the air inlet channel 203 and the interior of the base.

[0037] In this embodiment, the main shaft 20 includes an outer shaft 202 and an inner shaft 201 nested from the outside in. The gap between the outer wall of the inner shaft 201 and the inner wall of the outer shaft 202 forms a heat-insulating interlayer 204, and a vacuum is formed inside the heat-insulating interlayer 204; or the heat-insulating interlayer 204 is filled with heat-insulating material. Further, a reflector is arranged on the outer wall surface of the inner shaft 201 and the inner wall surface of the outer shaft 202, and the heat-insulating interlayer 204 and the reflector constitute a heat-insulating mechanism.

[0038] In this embodiment, as Figure 1-5 As shown, the base includes a housing 101, an upper end cover 102 located at the top of the housing 101, and a lower end cover 103 located at the bottom of the housing 101. The first bearing between the upper end cover 102 and the main shaft 20 is a tapered roller bearing 401. The tapered roller bearing 401 is provided in the first bearing chamber between the upper end cover 102 and the main shaft 20. That is, the non-driving end of the motor's main shaft 20 is provided with a tapered roller bearing 401 to bear the axial force generated by the weight of the motor and the flotation machine rotor 302, so as to ensure the safety and reliability of the motor during operation.

[0039] The second bearing between the lower end cover 103 and the main shaft 20 is a self-aligning roller bearing 402. That is, the drive end of the motor main shaft 20 is equipped with a self-aligning roller bearing 402 to withstand the radial force generated by the oscillation when the hollow main shaft 20 drives the flotation machine stirring shaft to rotate, so as to ensure the safety and reliability of the operation.

[0040] Based on the structural form and operating conditions of the motor and flotation machine, tapered roller bearings 401 and self-aligning roller bearings 402 are specifically designed to ensure the reliability of the overall operation. The structure is simple, easy to install, and has better economic efficiency.

[0041] In this embodiment, a connecting device 50 is also included, located on the outside of the machine base. One end of the connecting device 50 is used to communicate with the air source equipment, and the other end of the connecting device 50 is connected to the non-drive end of the main shaft 20. Specifically, the connecting device 50 is a rotary sealing joint, which is fixed during motor operation to ensure the safety of motor operation. The connection between the rotary sealing joint and the main shaft 20 is detachable. The connecting device 50 is simple and convenient to process and assemble, reducing operating costs.

[0042] In this embodiment, a coupling 60 is also included, located at the drive end of the main shaft 20, for connecting the drive end of the main shaft 20 to the stirring shaft of the flotation machine. By connecting the main shaft 20 to the stirring shaft of the flotation machine through the coupling 60, the main shaft 20 can be driven by a motor to drive the stirring shaft of the flotation machine while ensuring the supply of steam required by the flotation machine.

[0043] When the motor is running, the air-cooling device is activated, and the main shaft 20 rotates to drive the flotation machine stirring shaft connected to the drive end of the main shaft 20 to rotate, so as to stir the slurry or other materials. The air-cooling device realizes the cooling and heat dissipation of the motor, and the external air source equipment is connected to the main shaft 20 to supply steam during slurry stirring.

[0044] In this embodiment, the air-cooling device includes: a fan shroud 702, located on the side of the housing 101 and covering the entire housing 101; and a fan 701, located on the side of the housing 101 and connected to the fan shroud 702. Specifically, the air-cooling device is preferably a backpack-type fan 701, which is easy to install and provides stable and reliable operation. The air-cooling device is located on the side of the housing 101 assembly and is used for heat dissipation of the housing 101 assembly. Through a forced air-cooling structure, a stable and uniform supply of cooling gas is ensured, guaranteeing the overall heat dissipation effect of the motor and ensuring the safe and reliable operation of the motor. The fan shroud 702 is hollow to allow for the supply of flowing gas inside the housing 101. The housing 101 is provided with several heat dissipation holes 1011, and the air outlet of the air-cooling device is connected to the heat dissipation holes 1011.

[0045] In this embodiment, a water cooling device is also included. The water cooling device includes a circulating water channel distributed along the spiral direction inside the housing 101. The outer surface of the housing 101 is provided with a water inlet and a water outlet, which are respectively connected to the circulating water channel.

[0046] In this embodiment, a junction box 80 for electrical connection is also included, which is disposed on one side of the base.

[0047] In this embodiment, a retaining ring 4021 is provided at the bottom of the self-aligning roller bearing 402. The retaining ring 4021 is engaged with the main shaft 20 to limit the offset of the inner ring of the self-aligning roller bearing 402.

[0048] Example 2:

[0049] In this embodiment, the outer shaft 202 and inner shaft 201 nested from the outside in are eliminated. The heat insulation mechanism is replaced by a heat insulation layer arranged on the inner or outer side wall of the main shaft 20. Specifically, the heat insulation layer is made of a material with low thermal conductivity, such as aerogel felt. The heat generated by high-temperature steam is isolated by the heat insulation layer and cannot be transferred to the inside of the motor. This effectively suppresses the rotor 302 from overheating due to high-temperature steam and avoids malfunctions caused by motor overheating.

[0050] This utility model provides a high-temperature resistant hollow shaft permanent magnet direct drive motor, the working principle of which is as follows:

[0051] The bottom end of the hollow main shaft 20 is connected to a coupling 60 to connect the main shaft 20 to the stirring shaft of the flotation machine, realizing the functions of driving stirring and steam conveying. The top of the main shaft 20 is equipped with a connecting device 50 for introducing steam into the hollow main shaft 20. During operation, the rotor 302 drives the main shaft 20 to rotate, which in turn drives the coupling 60 to rotate. The heat insulation jacket 204 blocks heat conduction, thereby ensuring that the motor temperature does not get too high and preventing the heat of the steam from being conducted to the permanent magnet motor through the hollow main shaft 20, which would cause the motor temperature to rise continuously and affect its service life. At the same time, the air cooling device achieves the cooling effect of the motor. Self-aligning roller bearings 402 are specifically provided at the drive end of the main shaft 20 to withstand the radial force when the flotation machine main shaft 20 swings. Tapered roller bearings 401 are provided at the non-drive end of the main shaft 20 to withstand the axial force generated by the weight of the motor and the flotation machine.

[0052] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A high-temperature-resistant hollow-shaft permanent magnet direct-drive motor suitable for the equipment end with a hollow transmission shaft, comprising a base, characterized in that, Also comprising: a main shaft, along the axial direction of which is provided with an air inlet channel, the air inlet channel being communicated with the equipment end, the main shaft being covered with a heat insulation mechanism along the circumferential direction of the air inlet channel, a first bearing being provided between the non-driving end of the main shaft and the machine base, a second bearing being provided between the driving end of the main shaft and the machine base, the driving end of the main shaft being drivingly connected with a transmission shaft; a stator, which is assembled in the interior of the machine base, the stator being connected with the inner wall of the machine base; and a rotor, which is sleeved on the main shaft and cooperates with the stator; when high-temperature steam enters the equipment end through the air inlet channel, the heat insulation mechanism insulates the heat conduction between the air inlet channel and the interior of the machine base.

2. A high-temperature-resistant hollow-shaft permanent-magnet direct-drive motor according to claim 1, characterized in that, The main shaft comprises an outer shaft and an inner shaft which are nested from outside to inside, a gap between the outer wall of the inner shaft and the inner wall of the outer shaft forms a heat insulation interlayer, and a vacuum is formed in the heat insulation interlayer; or the heat insulation interlayer is filled with heat insulation material.

3. A high-temperature-resistant hollow-shaft permanent-magnet direct-drive motor according to claim 2, characterized in that, The outer wall surface of the inner shaft and the inner wall surface of the outer shaft are provided with a reflecting screen, and the heat insulation interlayer and the reflecting screen constitute the heat insulation mechanism.

4. The high-temperature-resistant hollow-shaft permanent-magnet direct-drive motor of claim 1, wherein, The machine base comprises a machine shell, an upper end cover provided at the top of the machine shell, and a lower end cover provided at the bottom of the machine shell, the first bearing between the upper end cover and the main shaft is a tapered roller bearing, and the second bearing between the lower end cover and the main shaft is a self-aligning roller bearing.

5. The high-temperature-resistant hollow-shaft permanent-magnet direct-drive motor according to claim 1, characterized in that, Further comprising a connecting device, which is sleeved on the non-driving end of the main shaft, one end of the connecting device being used for communicating with a gas source equipment, and the other end of the connecting device being communicated with the non-driving end of the main shaft.

6. A high-temperature-resistant hollow-shaft permanent-magnet direct-drive motor according to claim 1, characterized in that, Further comprising a shaft coupling, which is provided at the driving end of the main shaft, for connecting the driving end of the main shaft with a transmission shaft of the equipment end.

7. A high-temperature-resistant hollow-shaft permanent-magnet direct-drive motor according to claim 4, characterized in that, Further comprising an air cooling device, the air cooling device comprising: a fan cover provided on one side of the machine shell; and a fan provided on the side of the fan cover and communicated with the fan cover.

8. A high temperature resistant hollow shaft permanent magnet direct drive motor as claimed in claim 4, wherein, Further comprising a water cooling device, the water cooling device comprising a circulating water channel distributed along the spiral direction of the interior of the machine shell, the outer surface of the machine shell being provided with a water inlet and a water outlet, the water inlet and the water outlet being respectively communicated with the circulating water channel.

9. A high temperature resistant hollow shaft permanent magnet direct drive motor as claimed in claim 4, wherein, Further comprising a junction box for electrical connection, the junction box being provided on one side of the machine shell.

10. A high temperature resistant hollow shaft permanent magnet direct drive motor as claimed in claim 4, wherein, The bottom of the self-aligning roller bearing is provided with a retainer ring, the retainer ring abutting against the main shaft to limit the deviation of the inner ring of the self-aligning roller bearing.

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