A solid-liquid separation atomizer for preventing internal corrosion of an electric motor

Abstract

The present invention relates to the field of atomizers, and particularly to a solid-liquid separation atomizer for preventing corrosion inside a motor. The atomizer includes a magnetic levitation motor, a slurry inlet pipe, a slurry inlet rotary tooth, and an atomization disc; the magnetic levitation motor includes a stator shaft, a fixing plate, and a rotor housing. The fixing plate is fixed to one end face of the stator shaft. A motor stator, a plurality of radial magnetic bearing stators, and a plurality of axial magnetic bearings are fixedly sleeved on the outer wall of the stator shaft; the inner wall of the rotor housing is fixedly embedded with a motor rotor, a plurality of radial magnetic bearing rotors, and a thrust disc. The motor rotor and the plurality of radial magnetic bearing rotors respectively correspond to the positions of the motor stator and the plurality of radial magnetic bearing stators. The limiting parts of the plurality of axial magnetic bearings are respectively located on both axial sides of the thrust disc; one end of the slurry inlet rotary tooth is fixed to one end face of the rotor housing and closes one side of the rotor housing; the atomizer completely seals the inside of the magnetic levitation motor, extending the service life of the motor.

Description

Technical Field

[0001] The present invention relates to the field of atomizers, and in particular to a solid-liquid separation atomizer for preventing internal corrosion of a motor. Background Art

[0002] When an atomizer separates solids and liquids, first, the rotary teeth break up the lumpy substances in the slurry, and then the centrifugal force generated by high-speed rotation is used to centrifuge the feed liquid; under the action of the centrifugal force, the solids and liquids are separated because the distances at which the solids are thrown out are different from those of the liquids.

[0003] Chinese Patent Application for Invention (Publication No. CN110860389A, Publication Date: Mar. 6, 2020) discloses a magnetic levitation high-speed rotary atomizer, which includes a plurality of slurry inlet pipes, a liquid distributor, an atomization disk, and a motor; the slurry inlet pipes are installed at the top of the liquid distributor to introduce slurry into the liquid distributor; the liquid distributor includes a liquid distributor body and rotary teeth installed in the liquid distributor body to evenly distribute the slurry, and the bottom of the liquid distributor extends into the atomization disk to introduce the slurry into the atomization disk; the atomization disk is driven by the motor to rotate, and nozzles are arranged on the circumferential side of the atomization disk. The atomizer of the present invention has no mechanical contact during high-speed rotation, and has the advantages of high rotation speed, large power, low energy consumption, and no external lubrication.

[0004] The prior art has the following deficiencies: The traditional atomizer is of the inner rotor type, and the inner rotor needs to extend out of the casing to drive the rotary teeth for slurry inlet to rotate. Therefore, it is impossible to completely seal between the inner rotor and the casing; when the mixed liquid to be separated is corrosive, the corrosive gas formed after the atomizer separates it is likely to enter the interior of the motor and corrode important components such as bearings and stators, thereby causing the motor to fail. Summary of the Invention

[0005] The object of the present invention is: In view of the above problems, to propose an outer rotor form in which a magnetic levitation motor is made to drive the rotary teeth for slurry inlet to rotate by the rotor casing, and one end of the rotary teeth for slurry inlet is fixed to the rotor casing to seal the rotor casing; thereby completely sealing the interior of the magnetic levitation motor, preventing corrosive gas from entering the interior of the motor, and extending the service life of the motor, a solid-liquid separation atomizer for preventing internal corrosion of a motor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A solid-liquid separation atomizer for preventing internal corrosion of a motor. The atomizer includes a magnetic levitation motor, a slurry inlet pipe, a slurry inlet rotary tooth, and an atomizing disc; the magnetic levitation motor includes a stator shaft, a fixing plate, and a rotor housing. The fixing plate is fixed to one end face of the stator shaft. A motor stator, a plurality of radial magnetic bearing stators, and a plurality of axial magnetic bearings are fixedly sleeved on the outer wall of the stator shaft. The inner wall of the rotor housing is fixedly embedded with a motor rotor, a plurality of radial magnetic bearing rotors, and a thrust disc. The motor rotor and the plurality of radial magnetic bearing rotors respectively correspond to the positions of the motor stator and the plurality of radial magnetic bearing stators. The limiting parts of the plurality of axial magnetic bearings are respectively located on both axial sides of the thrust disc. One end of the slurry inlet rotary tooth is fixed to one end face of the rotor housing and closes one side of the rotor housing. The atomizing disc is fixedly connected to the other end of the slurry inlet rotary tooth. The atomizing disc is provided with a slurry inlet channel, and the other end of the slurry inlet rotary tooth is located in the slurry inlet channel. One end of the slurry inlet pipe is fixed to the fixing plate and is used to connect to the supply device of the mixed liquid to be separated, and the other end of the slurry inlet pipe is located at the inlet position of the slurry inlet channel.

[0008] Preferably, the rotor housing includes a motor cylinder, an upper protective bearing seat, and a lower protective bearing seat. The upper protective bearing seat and the lower protective bearing seat are respectively fixed to the upper and lower ends of the motor cylinder. One end of the slurry inlet rotary tooth is fixed to the lower end face of the lower protective bearing seat.

[0009] Preferably, the solid-liquid separation atomizer is further provided with protective bearings. The upper protective bearing seat and the lower protective bearing seat are both provided with protective bearing inner holes. A plurality of protective bearings are sleeved on the outer wall of the stator shaft and are respectively located in the protective bearing inner holes. The inner ring of the protective bearing is in interference fit with the outer wall of the stator shaft, and there is a gap between the outer ring of the protective bearing and the inner wall of the protective bearing inner hole.

[0010] Preferably, sealing treatments are performed between the motor cylinder and the upper protective bearing seat, between the motor cylinder and the lower protective bearing seat, and between the slurry inlet rotary tooth and the lower protective bearing seat.

[0011] Preferably, the atomizing disc includes an atomizing bottom plate and a rotary tooth outer ring. The atomizing bottom plate is provided with a bottom plate cavity, and the rotary tooth outer ring is provided with a rotary tooth hole. The bottom plate cavity and the rotary tooth hole are connected to form a slurry inlet channel.

[0012] Preferably, the inner wall of the bottom plate cavity is provided with a guide surface, the guide surface is arc-shaped, and the guide surface is used to guide the mixed liquid to be separated. The materials of the slurry inlet rotary tooth and the atomizing disc are both stainless steel or titanium alloy.

[0013] Preferably, a plurality of radial sensors are fixedly sleeved on the outer wall of the stator shaft, and the radial sensors are used to detect the radial position of the rotor housing. The fixing plate is fixedly provided with an axial sensor, and the upper protective bearing seat is provided with an axial measured object. The sensing end of the axial sensor corresponds to the position of the axial measured object, and the axial sensor is used to detect the axial position of the rotor housing.

[0014] Preferably, the motor stator includes silicon steel sheets and permanent magnets; a plurality of silicon steel sheets are stacked axially, and the silicon steel sheets are provided with permanent magnet holes, and a plurality of permanent magnets are fixedly embedded in the permanent magnet holes.

[0015] Preferably, the stator shaft is provided with an axial first channel, a radially penetrating second channel and a third channel, and the silicon steel sheets are provided with axially penetrating ventilation grooves; the first channel and the third channel are respectively communicated with the outside; the first channel, the second channel, the gap between the lower radial magnetic bearing stator and the radial magnetic bearing rotor, the ventilation groove, the gap between the upper radial magnetic bearing stator and the radial magnetic bearing rotor, the gap between the axial magnetic bearing and the thrust disk, and the third channel are sequentially communicated to form an air-cooling channel.

[0016] The advantages of the solid-liquid separation atomizer for preventing internal corrosion of the motor adopting the above technical scheme of the present invention are:

[0017] During operation, after the motor stator is powered on, it drives the motor rotor to rotate, and then drives the rotor housing to rotate. The radial magnetic bearing stator radially supports the rotor housing by controlling the radial magnetic bearing rotor, and the axial magnetic bearing axially positions the rotor housing by controlling the thrust disk; the rotation of the rotor housing drives the feed-in slurry rotating teeth and the atomization disk to rotate. The supply device of the mixed liquid to be separated supplies the mixed liquid to be separated to the inlet position of the feed-in channel through the feed-in pipe. The feed-in slurry rotating teeth crush it, and then the atomization disk separates the solids and liquids therein to complete the atomization process. In this way, the rotor housing is in the form of an outer rotor to drive the feed-in slurry rotating teeth to rotate. The stator shaft does not need to extend out of the rotor housing, and one end of the feed-in slurry rotating teeth is fixed to the rotor housing to seal the rotor housing; thus, the inside of the magnetic levitation motor is completely sealed, preventing corrosive gases from entering the inside of the motor and extending the service life of the motor. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the rotor part.

[0020] Figure 3 It is a schematic structural diagram of the stator part.

[0021] Figure 4 、 Figure 5 It is a schematic structural diagram of the feed-in slurry rotating teeth.

[0022] Figure 6 、 Figure 7 It is a schematic structural diagram of the atomization chassis.

[0023] Figure 8 It is a schematic structural diagram of the stator shaft.

[0024] Figure 9 、Figure 10 It is a schematic structural diagram of a motor rotor.

[0025] Figure 11 、 Figure 12 It is a schematic structural diagram of a radial magnetic bearing stator and a radial magnetic bearing rotor.

[0026] Figure 13 、 Figure 14 It is a schematic structural diagram of a fixing plate.

[0027] L - magnetic field circuit. Specific embodiments

[0028] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Embodiment 1

[0030] Such as Figure 1A solid-liquid separation atomizer for preventing corrosion inside a motor is shown. The atomizer includes a magnetic levitation motor 1, a slurry inlet pipe 2, a slurry inlet rotating tooth 3, and an atomization disc 4. The magnetic levitation motor 1 includes a stator shaft 11, a fixing plate 12, and a rotor housing 13. The fixing plate 12 is fixed to one end face of the stator shaft 11. An outer motor stator 14, a plurality of radial magnetic bearing stators 15, and a plurality of axial magnetic bearings 16 are fixedly sleeved on the outer wall of the stator shaft 11. Inside the inner wall of the rotor housing 13, a motor rotor 17, a plurality of radial magnetic bearing rotors 18, and a thrust disc 19 are fixedly embedded. The positions of the motor rotor 17 and the plurality of radial magnetic bearing rotors 18 respectively correspond to those of the motor stator 14 and the plurality of radial magnetic bearing stators 15. The limiting parts of the plurality of axial magnetic bearings 16 are respectively located on both axial sides of the thrust disc 19. One end of the slurry inlet rotating tooth 3 is fixed to one end face of the rotor housing 13 and closes one side of the rotor housing 13. The atomization disc 4 is fixedly connected to the other end of the slurry inlet rotating tooth 3. The atomization disc 4 is provided with a slurry inlet channel 41, and the other end of the slurry inlet rotating tooth 3 is located inside the slurry inlet channel 41. One end of the slurry inlet pipe 2 is fixed to the fixing plate 12 and is used to connect to the supply device of the mixed liquid to be separated. The other end of the slurry inlet pipe 2 is located at the inlet position of the slurry inlet channel 41. During operation, after the motor stator 14 is energized, it drives the motor rotor 17 to rotate, thereby driving the rotor housing 13 to rotate. The radial magnetic bearing stator 15 radially supports the rotor housing 13 by controlling the radial magnetic bearing rotor 18, and the axial magnetic bearing 16 axially positions the rotor housing 13 by controlling the thrust disc 19. The rotation of the rotor housing 13 drives the slurry inlet rotating tooth 3 and the atomization disc 4 to rotate. The supply device of the mixed liquid to be separated supplies the mixed liquid to be separated to the inlet position of the slurry inlet channel 41 through the slurry inlet pipe 2. The slurry inlet rotating tooth 3 crushes it, and then the atomization disc 4 separates the solid and liquid therein to complete the atomization process. In this way, the rotor housing 13 is in the form of an outer rotor to drive the slurry inlet rotating tooth 3 to rotate. The stator shaft 11 does not need to extend out of the rotor housing 13, and one end of the slurry inlet rotating tooth 3 is fixed to the rotor housing 13 to close the rotor housing 13. Thus, the inside of the magnetic levitation motor 1 is completely sealed, preventing corrosive gases from entering the inside of the motor and extending the service life of the motor.

[0031] The rotor housing 13 includes a motor cylinder 131, an upper protective bearing seat 132, and a lower protective bearing seat 133. The upper protective bearing seat 132 and the lower protective bearing seat 133 are respectively fixed to the upper and lower ends of the motor cylinder 131. One end of the slurry inlet rotating tooth 3 is fixed to the lower end face of the lower protective bearing seat 133.

[0032] The solid-liquid separation atomizer is also provided with a protective bearing 5, and the upper protective bearing seat 132 and the lower protective bearing seat 133 are both provided with a protective bearing inner hole; multiple protective bearings 5 ​​are sleeved on the outer wall of the stator shaft 11 and are respectively located in the protective bearing inner holes; the inner ring of the protective bearing 5 is interference fit with the outer wall of the stator shaft 11, and there is a gap between the outer ring of the protective bearing 5 and the inner wall of the protective bearing inner hole. When the equipment suddenly loses power or shuts down, the radial magnetic bearing stator 15 and the axial magnetic bearing 16 lose their magnetic force and cannot support and limit the rotor housing 13. At this time, the rotor housing 13 falls and contacts the outer ring of the protective bearing 5 and is supported by the protective bearing 5; thereby avoiding the damage of important parts such as the radial magnetic bearing stator 15 and the axial magnetic bearing 16 caused by the sudden fall of the rotor housing 13 when the motor suddenly loses power or shuts down.

[0033] The motor barrel 131 and the upper protective bearing seat 132, the motor barrel 131 and the lower protective bearing seat 133, and the inlet rotary gear 3 and the lower protective bearing seat 133 are all sealed to prevent corrosive gases from entering the motor through the gaps between the various parts.

[0034] like Figure 1 , Figure 6 , Figure 7 As shown, the atomizing disk 4 includes an atomizing bottom disk 42 and a spiral gear outer ring 43; the atomizing bottom disk 42 is provided with a bottom disk cavity 44, the spiral gear outer ring 43 is provided with a spiral gear hole 45, and the bottom disk cavity 44 and the spiral gear hole 45 are connected to form a slurry inlet channel 41. The mixed liquid to be separated transported by the slurry inlet pipe 2 enters the inside of the atomizing disk 4 along the spiral gear hole 45 and the bottom disk cavity 44 in sequence to prevent the internal components of the motor from being corroded.

[0035] The inner wall of the bottom plate cavity 44 is provided with a guide surface 46 . The guide surface 46 is arc-shaped and is used to guide the mixed liquid to be separated.

[0036] The materials of the slurry inlet rotor 3 and the atomizing disk 4 are both stainless steel or titanium alloy. Stainless steel or titanium alloy has excellent corrosion resistance, which increases the service life of the slurry inlet rotor 3 and the atomizing disk 4.

[0037] The outer wall of the stator shaft 11 is fixedly sleeved with multiple radial sensors 111, which are used to detect the radial position of the rotor housing 13; the fixing plate 12 is fixedly provided with an axial sensor 121, and the upper protective bearing seat 132 is provided with an axial measured object 122; the sensing end of the axial sensor 121 corresponds to the position of the axial measured object 122, and the axial sensor 121 is used to detect the axial position of the rotor housing 13.

[0038] like Figure 9 , Figure 10As shown, the motor rotor 17 includes silicon steel sheets 141 and permanent magnets 142; a plurality of silicon steel sheets 141 are stacked axially, and the silicon steel sheets 141 are provided with magnet holes 143, and a plurality of permanent magnets 142 are fixedly embedded in the magnet holes 143.

[0039] As Figure 1 , Figure 8 , Figure 10 shown, the stator shaft 11 is provided with an axial first channel 112, a radially penetrating second channel 113 and a third channel 114, and the silicon steel sheet 141 is provided with an axially penetrating ventilation groove 144; the first channel 112 and the third channel 114 are respectively communicated with the outside; the first channel 112, the second channel 113, the gap between the lower radial magnetic bearing stator 15 and the radial magnetic bearing rotor 18, the ventilation groove 144, the gap between the upper radial magnetic bearing stator 15 and the radial magnetic bearing rotor 18, the gap between the axial magnetic bearing 16 and the thrust disk 19, and the third channel 114 are sequentially communicated to form an air-cooling channel to cool the magnetic levitation motor 1.

Claims

1. A solid-liquid separation atomizer for preventing internal corrosion of an electric motor, characterized in that, the atomizer comprises a magnetic levitation motor (1), a slurry inlet pipe (2), a slurry inlet spiral tooth (3) and an atomization disc (4); the magnetic levitation motor (1) comprises a stator shaft (11), a fixing plate (12) and a rotor housing (13), the fixing plate (12) is fixed to one end face of the stator shaft (11), and an electric motor stator (14), a plurality of radial magnetic bearing stators (15) and a plurality of axial magnetic bearings (16) are fixedly sleeved on the outer wall of the stator shaft (11); an electric motor rotor (17), a plurality of radial magnetic bearing rotors (18) and a thrust disc (19) are fixedly embedded in the inner wall of the rotor housing (13), the electric motor rotor (17) and the plurality of radial magnetic bearing rotors (18) respectively correspond to the positions of the electric motor stator (14) and the plurality of radial magnetic bearing stators (15), and the limiting parts of the plurality of axial magnetic bearings (16) are respectively located on both axial sides of the thrust disc (19); one end of the slurry inlet spiral tooth (3) is fixed to one end face of the rotor housing (13) and closes one side of the rotor housing (13), and the atomization disc (4) is fixedly connected to the other end of the slurry inlet spiral tooth (3); the atomization disc (4) is provided with a slurry inlet channel (41), and the other end of the slurry inlet spiral tooth (3) is located in the slurry inlet channel (41); one end of the slurry inlet pipe (2) is fixed to the fixing plate (12) and is used for connecting a supply device of the mixed liquid to be separated, and the other end of the slurry inlet pipe (2) is located at the inlet position of the slurry inlet channel (41).

2. The solid-liquid separation atomizer for preventing internal corrosion of an electric motor according to claim 1, characterized in that, the rotor housing (13) comprises a motor cylinder (131), an upper protective bearing seat (132) and a lower protective bearing seat (133), the upper protective bearing seat (132) and the lower protective bearing seat (133) are respectively fixed to the upper and lower ends of the motor cylinder (131); one end of the slurry inlet spiral tooth (3) is fixed to the lower end face of the lower protective bearing seat (133).

3. The solid-liquid separation atomizer for preventing internal corrosion of an electric motor according to claim 2, characterized in that, the solid-liquid separation atomizer is further provided with protective bearings (5), and the upper protective bearing seat (132) and the lower protective bearing seat (133) are both provided with protective bearing inner holes; a plurality of protective bearings (5) are all sleeved on the outer wall of the stator shaft (11) and are respectively located in the protective bearing inner holes; the inner ring of the protective bearing (5) is in interference fit with the outer wall of the stator shaft (11), and there is a gap between the outer ring of the protective bearing (5) and the inner wall of the protective bearing inner hole.

4. The solid-liquid separation atomizer for preventing internal corrosion of an electric motor according to claim 2, characterized in that, sealing treatments are performed between the motor cylinder (131) and the upper protective bearing seat (132), between the motor cylinder (131) and the lower protective bearing seat (133), and between the slurry inlet spiral tooth (3) and the lower protective bearing seat (133).

5. The solid-liquid separation atomizer for preventing internal corrosion of an electric motor according to claim 1, characterized in that, The atomization disk (4) includes an atomization bottom plate (42) and a spiral tooth outer ring (43); the atomization bottom plate (42) is provided with a bottom plate cavity (44), the spiral tooth outer ring (43) is provided with spiral tooth holes (45), and the bottom plate cavity (44) and the spiral tooth holes (45) are connected to form a slurry inlet channel (41).

6. The solid-liquid separation atomizer for preventing internal corrosion of a motor according to claim 5, characterized in that, a flow guiding surface (46) is provided on the inner wall of the bottom plate cavity (44), the flow guiding surface (46) is arc-shaped, and the flow guiding surface (46) is used for guiding the liquid-solid mixture to be separated.

7. The solid-liquid separation atomizer for preventing internal corrosion of a motor according to claim 1, characterized in that, the materials of the slurry inlet spiral teeth (3) and the atomization disk (4) are both stainless steel or titanium alloy.

8. The solid-liquid separation atomizer for preventing internal corrosion of a motor according to claim 2, characterized in that, a plurality of radial sensors (111) are fixedly sleeved on the outer wall of the stator shaft (11), and the radial sensors (111) are used to detect the radial position of the rotor housing (13); an axial sensor (121) is fixedly provided on the fixing plate (12), and an axially measured object (122) is provided on the upper protection bearing seat (132); the sensing end of the axial sensor (121) corresponds to the position of the axially measured object (122), and the axial sensor (121) is used to detect the axial position of the rotor housing (13).

9. The solid-liquid separation atomizer for preventing internal corrosion of a motor according to claim 1, characterized in that, the motor stator (14) includes silicon steel sheets (141) and permanent magnets (142); a plurality of silicon steel sheets (141) are stacked axially, the silicon steel sheets (141) are provided with permanent magnet holes (143), and a plurality of permanent magnets (142) are fixedly embedded in the permanent magnet holes (143).

10. The solid-liquid separation atomizer for preventing internal corrosion of a motor according to claim 9, characterized in that, the stator shaft (11) is provided with an axial first channel (112), a radially penetrating second channel (113) and a third channel (114), and the silicon steel sheets (141) are provided with axially penetrating ventilation grooves (144); the first channel (112) and the third channel (114) are respectively communicated with the outside; the first channel (112), the second channel (113), the gap between the lower radial magnetic bearing stator (15) and the radial magnetic bearing rotor (18), the ventilation groove (144), the gap between the upper radial magnetic bearing stator (15) and the radial magnetic bearing rotor (18), the gap between the axial magnetic bearing (16) and the thrust plate (19) and the third channel (114) are sequentially communicated to form an air cooling channel.

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