Hollow shaft water-cooled permanent magnet motor for flotation machine

Abstract

The utility model relates to hollow shaft water -cooling permanent magnet motor for flotation machine, contain air pipe, motor, connecting seat, hollow stirring axle, gas guide cover, stirring fan blade, air pipe is encased in the tail end of connecting seat, air pipe is connected with motor through connecting seat, the centre of connecting seat is set from top to bottom and is provided with the through -hole for passing through air, connecting seat is fixedly installed on the bearing outer cover set up above motor through the flange face set up below, the axle of hollow rotating shaft of motor is connected through the top flange of hollow stirring axle with the flange plate, hollow rotating shaft is hollow tubular structure, stirring fan blade is fixedly installed in the lower extreme of hollow stirring axle and is used for stirring the ore pulp, gas guide cover is fixedly installed below motor and is encased in the outside of hollow stirring axle. The utility model improves transmission efficiency, strengthens the heat dissipation, and reduces the motor volume under the condition of the invariable power.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a hollow shaft water-cooled permanent magnet motor for flotation machines. Background Technology

[0002] In existing technologies, such as Figure 1 The agitation section of the flotation machine shown consists of a motor driving a pulley, which in turn drives agitator blades to agitate the slurry. Air enters the air intake hood through the air inlet pipe and then into the agitated slurry.

[0003] The shortcomings of existing technology are:

[0004] 1. In the existing technology, the stirring part of the flotation machine is driven by a motor and a pulley, which in turn drives the stirring blades, resulting in large vibrations and low transmission efficiency.

[0005] 2. In order to avoid aging and slippage of the pulley, the pulley needs to be replaced regularly in the existing technology, which leads to increased maintenance costs.

[0006] 3. In the existing technology, the stirring part of the flotation machine is driven by a motor and a pulley, which in turn drives the stirring blades, resulting in a complex motor structure. Summary of the Invention

[0007] This invention addresses the aforementioned problems by providing a hollow shaft water-cooled permanent magnet motor for flotation machines. Its purpose is to improve transmission efficiency, enhance heat dissipation, and reduce motor size without changing power.

[0008] To solve the above problems, the technical solution provided by this utility model is as follows:

[0009] The hollow shaft water-cooled permanent magnet motor for the flotation machine includes an air inlet pipe, a motor, a connecting base, a hollow stirring shaft, an air guide shroud, and stirring blades, wherein:

[0010] The air intake pipe is fitted onto the tail end of the connecting seat; the air intake pipe is connected to the motor via the connecting seat; the connecting seat has a through hole from top to bottom in its center for air passage; the connecting seat is fixedly mounted on the bearing cover located above the motor via a flange face located below; the shaft extension of the hollow rotating shaft of the motor is connected to the top flange of the hollow stirring shaft via a flange; the hollow rotating shaft is a hollow tubular structure; the stirring blades are fixedly mounted on the lower end of the hollow stirring shaft and are used for stirring the slurry; the air guide cover is fixedly mounted below the motor and fitted onto the outside of the hollow stirring shaft.

[0011] Preferably, the lower end of the hollow stirring shaft is provided with an exhaust hole.

[0012] Preferably, the inner ring of the connecting seat is provided with a tapered stop at the connection point with the hollow rotating shaft; the tapered stop is inserted into the inner hole of the hollow rotating shaft.

[0013] Preferably, the bearing cover and the hollow shaft are sealed with an oil seal to prevent air from being blown into the bearing chamber of the motor.

[0014] Preferably, the motor rotor is a surface-mounted permanent magnet rotor; the motor rotor includes the hollow shaft, auxiliary plate, pressure bar, magnet, rotor core, and retaining ring, wherein: the rotor core is made of seamless steel pipe; the rotor core is heat-fitted onto the auxiliary plate of the hollow shaft; the outer ring of the rotor core is drilled with pressure bar mounting holes; the pressure bar is installed onto the rotor core through the pressure bar mounting holes; the retaining ring is installed below the motor rotor to hold the magnet; after the retaining ring is installed, the magnet is inserted between the pressure bars.

[0015] Preferably, the retaining ring is made of stainless steel non-magnetic material; the pressure strip is made of high-temperature extruded aluminum alloy; and the pressure strip is machined with screw countersunk holes.

[0016] Preferably, before the magnet is inserted into the pressure bar, epoxy adhesive is applied to the outer circumference of the rotor core and the contact surface between the pressure bar and the magnet to fix the magnet.

[0017] Preferably, after each magnet is inserted, quick-drying adhesive is applied to the contact surfaces of two adjacent magnets to bond the magnets together and counteract the repulsive force.

[0018] Preferably, the motor frame is a water-cooled structure; the frame includes an outer plate, an inner cylinder, a core, a front ring, and a rear ring, wherein: the core is a round tube with a through hole, made of cast steel, and the two ends of the through hole are welded and connected by metal connecting pipes; the rear ring is welded to one end of the inner cylinder; the inner circle of the core is machined to a pre-set design size and then heat-fitted onto the inner cylinder, and then the front ring is welded to the other end of the inner cylinder; the outer circles of the core, the front ring, and the rear ring are machined to a pre-set design size and then the outer plate is heat-fitted onto the core, the front ring, and the rear ring. The base is formed as a whole; the outer diameter of the front end ring is larger than the inner diameter of the outer perimeter plate, which is used to block the outer perimeter plate; the outer diameter of the core and the front end ring is equal to the inner diameter of the outer perimeter plate; a waterproof cable sleeve is provided at the outlet hole of the inner cylinder of the base; a cable hole is provided at the corresponding position of the cable outlet hole of the outer perimeter plate and the inner cylinder of the base; a water leakage hole is provided at the lower part of the outer perimeter plate, which is used to drain water seepage at the weld of the connecting pipe; the lead wire of the base passes through the cable sleeve and the cable hole and extends to the outside of the base; one end of the water inlet and outlet pipe of the base is connected to the core, and the other end extends to the outside of the base.

[0019] Preferably, the wire guide sleeve is sealed with putty and then filled with epoxy resin for sealing.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] 1. Since this utility model directly drives the stirring fan blades with a motor, eliminating the need for a belt pulley, it improves the transmission efficiency.

[0022] 2. Because the motor housing of this utility model adopts a water-cooled structure, heat dissipation is enhanced, and the motor size is reduced without changing the power. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the stirring part of a prior art flotation machine, which is a specific embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the hollow shaft water-cooled permanent magnet motor for a flotation machine according to a specific embodiment of the present invention;

[0025] Figure 3 for Figure 2 A magnified view of part I;

[0026] Figure 4a This is a schematic diagram of the motor rotor structure of a specific embodiment of the present utility model;

[0027] Figure 4bThis is a side view schematic diagram of the motor rotor according to a specific embodiment of the present utility model;

[0028] Figure 4c This is a schematic front view of the motor rotor according to a specific embodiment of the present invention;

[0029] Figure 4d for Figure 4c A magnified view of section II;

[0030] Figure 5a This is a schematic diagram of the base structure of a specific embodiment of the present utility model;

[0031] Figure 5b This is a schematic diagram of the core structure of a specific embodiment of the present utility model;

[0032] Figure 6a A schematic diagram of the water inlet and outlet structure of the base in the prior art, which is a specific embodiment of this utility model;

[0033] Figure 6b for Figure 6a A magnified view of section III.

[0034] The components include: 1. Inlet pipe, 2. Motor, 3. Connecting seat, 4. Hollow stirring shaft, 5. Air guide cover, 6. Stirring fan blade, 7. Bearing cover, 8. Flange, 9. Pulley, 10. Exhaust port, 11. Tapered stop, 12. Oil seal, 210. Motor rotor, 211. Hollow rotating shaft, 212. Auxiliary plate, 213. Pressure strip, 214. Magnet, 215. Rotor core, 216. Retaining ring, 220. Base, 221. Outer plate, 222. Inner cylinder of base, 223. Core, 224. Front ring, 225. Rear ring, 226. Wire guide sleeve, 227. Wire guide hole, 228. Drain hole, 229. Lead wire, 2210. Inlet and outlet water pipes, 2211. Putty, 2212. Epoxy glue. Detailed Implementation

[0035] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0036] The flotation machine uses a hollow shaft water-cooled permanent magnet motor, such as Figure 2 , 3 As shown, it includes an air inlet pipe 1, a motor 2, a connecting base 3, a hollow stirring shaft 4, an air guide cover 5, and stirring blades 6, wherein:

[0037] The air inlet pipe 1 is fitted onto the tail end of the connecting seat 3; the air inlet pipe 1 is connected to the motor 2 via the connecting seat 3; the connecting seat 3 has a through hole running from top to bottom through its center for air passage; the connecting seat 3 is fixedly mounted on the bearing cover 7 located above the motor 2 via a flange face located below; the shaft extension of the hollow rotating shaft 211 of the motor 2 is connected to the top flange of the hollow stirring shaft 4 via a flange 8; the hollow rotating shaft 211 is a hollow tubular structure; the stirring blade 6 is fixedly mounted on the lower end of the hollow stirring shaft 4 and is used to stir the slurry; the air guide cover 5 is fixedly mounted below the motor 2 and fitted onto the outside of the hollow stirring shaft 4. Air passes sequentially through the air inlet pipe 1, the connecting seat 3, and the hollow stirring shaft 4.

[0038] It should be noted that the lower end of the hollow stirring shaft 4 is provided with an exhaust port 10. Air enters the air guide shroud 5 and then enters the slurry being stirred.

[0039] It should be noted that the inner ring of the connecting seat 3 is provided with a tapered stop 11 at the connection between it and the hollow rotating shaft 211; the tapered stop 11 is inserted into the inner hole of the hollow rotating shaft 211 to ensure that air can effectively pass into the hollow rotating shaft 211 and prevent air from overflowing.

[0040] It should be further explained that the hollow rotating shaft 211 can not only serve as a pipeline for air to flow to the hollow stirring shaft 4, but also cool the motor rotor 210 during the air flow process.

[0041] It should be further explained that the connecting seat 3 and the bearing outer cover 7 are fixed parts, while the hollow rotating shaft 211 is a rotating part.

[0042] It should be noted that the bearing cover 7 and the hollow shaft 211 are sealed by an oil seal 12 to prevent air from being blown into the bearing chamber of the motor 2.

[0043] It should be noted that, through this invention, the motor 2 can directly drive the stirring blades 6, eliminating the need for the belt pulley 9. Furthermore, air can be directly introduced into the slurry through the hollow rotating shaft 211 of the motor 2 and the hollow stirring shaft 4.

[0044] It should be noted that, as Figure 4a , 4bAs shown in 4c and 4d, the motor rotor 210 of the motor 2 is a surface-mounted permanent magnet rotor. The motor rotor 210 includes a hollow shaft 211, an auxiliary plate 212, a pressure bar 213, a magnet 214, a rotor core 215, and a retaining ring 216. The rotor core 215 is made of seamless steel pipe. The rotor core 215 is heat-fitted onto the auxiliary plate 212 of the hollow shaft 211. The outer ring of the rotor core 215 is drilled with pressure bar mounting holes. The pressure bar 213 is installed onto the rotor core 215 through the pressure bar mounting holes. The retaining ring 216 is installed below the motor rotor 210 to hold the magnet 214 in place. After the retaining ring 216 is installed, the magnet 214 is inserted between the pressure bars 213.

[0045] It should be further explained that the retaining ring 216 is made of stainless steel, a non-magnetic material; the pressure strip 213 is made of high-temperature extruded aluminum alloy; and the pressure strip 213 has countersunk holes for screws. Aluminum alloy is not only high in strength but also lightweight, which can effectively reduce the moment of inertia during start-up and stop; furthermore, aluminum alloy has better thermal conductivity than steel, which can absorb and dissipate the heat generated by the rotor core 215 to a certain extent. The pressure strip can be regarded as a heat sink for the motor rotor 210.

[0046] It should be further explained that before the magnet 214 is inserted into the pressure bar 213, epoxy adhesive is applied to the outer circle of the rotor core 215 and the contact surface between the pressure bar 213 and the magnet 214 to fix the magnet 214.

[0047] It should be further explained that, due to the repulsive force between the magnets 214, after each magnet 214 is inserted, quick-drying adhesive is applied to the contact surfaces of adjacent magnets 214 to bond them together and counteract the repulsive force. The quick-drying adhesive is a 30-second fast-drying adhesive.

[0048] It should be noted that, as Figure 5a , 5bAs shown in 6a and 6b, the frame 220 of the motor 2 is a water-cooled structure, which has better heat dissipation efficiency than the air-cooled structure of the prior art. The temperature rise of the motor 2 is lower, which effectively prevents the magnet 214 from demagnetizing due to high temperature. The base 220 includes an outer plate 221, an inner cylinder 222, a core 223, a front ring 224, and a rear ring 225. The core 223 is a round tube with a through hole, made of cast steel, with the two ends of the through hole welded and connected by metal connecting pipes. The rear ring 225 is welded to one end of the inner cylinder 222. The inner circle of the core 223 is machined to a pre-designed size and then heat-fitted onto the inner cylinder 222. The front ring 224 is then welded to the other end of the inner cylinder 222. The outer circles of the core 223, front ring 224, and rear ring 225 are machined to a pre-designed size, and then the outer plate 221 is heat-fitted onto the core 223, front ring 224, and rear ring 225, making the base 220 a single unit. The outer diameter of the front ring 224 is larger than that of the outer plate 221. The inner diameter of 21 is used to block the outer plate 221; the outer diameter of the core 223 and the front end ring 224 is equal to the inner diameter of the outer plate 221, which allows the heated and expanded outer plate 221 to pass smoothly and can fit tightly after the outer plate 221 cools down; a waterproof cable sleeve 226 is provided at the outlet hole of the inner cylinder 222 of the base; a cable hole 227 is provided at the corresponding position of the outlet hole of the outer plate 221 and the inner cylinder 222 of the base; a water leakage hole 228 is provided at the lower part of the outer plate 221 to drain water seepage at the welded joint of the connecting pipe; the lead wire 229 of the base 220 passes through the cable sleeve 226 and the cable hole 227 and extends to the outside of the base 220; one end of the water inlet and outlet pipe 2210 of the base 220 is connected to the core 223, and the other end extends to the outside of the base 220.

[0049] It should be further explained that after turning, the use of heat fitting can ensure that the inner cylinder 222, core 223 and outer plate 221 of the machine base are tightly fitted together, and the heat is effectively conducted.

[0050] It should be further explained that the outer plate 221 mainly serves to strengthen the end rings at both ends of the base 220, and also protects the water connection pipes.

[0051] It should be further noted that motor 2 is used vertically.

[0052] It should be further explained that the water circuit design of the frame 220 enables the cooling water to fully exchange heat with the frame 220.

[0053] It should be further explained that after sealing the wire sleeve 226 with putty 2211, epoxy glue 2212 is poured in to seal it, achieving a waterproof effect; this prevents water seepage from the connecting pipe of the core 223 from entering the interior of the base 220 and causing a short circuit in the motor 2.

[0054] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the present invention is in a state with fewer features than all of the disclosed individual embodiments. Therefore, the appended claims are hereby clearly incorporated into the detailed description, wherein each claim stands alone as a preferred embodiment of the present invention.

[0055] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0056] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0057] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A hollow shaft water-cooled permanent magnet motor for a flotation machine, characterized in that: Includes an air inlet pipe (1), a motor (2), a connecting seat (3), a hollow stirring shaft (4), an air guide cover (5), and stirring blades (6), wherein: The air inlet pipe (1) is fitted onto the tail end of the connecting seat (3); the air inlet pipe (1) is connected to the motor (2) through the connecting seat (3); the center of the connecting seat (3) is provided with a through hole for air to pass through from top to bottom; the connecting seat (3) is fixedly installed on the bearing cover (7) above the motor (2) through the flange face located below; the shaft extension of the hollow rotating shaft (211) of the motor (2) is connected to the top flange of the hollow stirring shaft (4) through the flange (8); the hollow rotating shaft (211) is a hollow tubular structure; the stirring fan blade (6) is fixedly installed at the lower end of the hollow stirring shaft (4) and is used to stir the slurry; the air guide cover (5) is fixedly installed below the motor (2) and fitted onto the outside of the hollow stirring shaft (4).

2. The hollow shaft water-cooled permanent magnet motor for flotation machines according to claim 1, characterized in that: The lower end of the hollow stirring shaft (4) is provided with an exhaust hole (10).

3. The hollow shaft water-cooled permanent magnet motor for flotation machines according to claim 2, characterized in that: The inner ring of the connecting seat (3) is provided with a tapered stop (11) at the connection between it and the hollow rotating shaft (211); the tapered stop (11) is inserted into the inner hole of the hollow rotating shaft (211).

4. The hollow shaft water-cooled permanent magnet motor for flotation machines according to claim 3, characterized in that: The bearing cover (7) and the hollow shaft (211) are sealed by an oil seal (12) to prevent air from being blown into the bearing chamber of the motor (2).

5. The hollow shaft water-cooled permanent magnet motor for flotation machines according to claim 4, characterized in that: The motor rotor (210) of the motor (2) is a surface-mounted permanent magnet rotor; the motor rotor (210) includes the hollow shaft (211), auxiliary plate (212), pressure bar (213), magnet (214), rotor core (215), and retaining ring (216), wherein: the rotor core (215) is made of seamless steel pipe; the rotor core (215) is heat-fitted onto the auxiliary plate (212) of the hollow shaft (211); the outer ring of the rotor core (215) is drilled with pressure bar mounting holes; the pressure bar (213) is installed onto the rotor core (215) through the pressure bar mounting holes; the retaining ring (216) is installed below the motor rotor (210) to hold the magnet (214); after the retaining ring (216) is installed, the magnet (214) is inserted between the pressure bars (213).

6. The hollow shaft water-cooled permanent magnet motor for flotation machines according to claim 5, characterized in that: The retaining ring (216) is made of stainless steel non-magnetic material; the pressure strip (213) is made of high temperature aluminum alloy extrusion molding; the pressure strip (213) is machined with screw countersunk holes.

7. The hollow shaft water-cooled permanent magnet motor for flotation machines according to claim 6, characterized in that: The outer circle of the rotor core (215) and the contact surface between the pressure strip (213) and the magnet (214) are coated with epoxy resin for fixing the magnet (214).

8. The hollow shaft water-cooled permanent magnet motor for flotation machines according to claim 7, characterized in that: The contact surfaces of two adjacent magnets (214) are coated with quick-drying adhesive to bond the magnets (214) together and counteract the repulsive force.

9. The hollow shaft water-cooled permanent magnet motor for flotation machines according to claim 8, characterized in that: The motor (2) has a water-cooled frame (220); the frame (220) includes an outer plate (221), an inner cylinder (222), a core (223), a front ring (224), and a rear ring (225), wherein: the core (223) is a round tube with a through hole, made of cast steel, and the two ends of the through hole are welded and connected by metal connecting pipes; the rear ring (225) is welded to one end of the inner cylinder (222); the inner circle of the core (223) The dimensions are preset design dimensions after machining. The inner circle of the core (223) is heat-shrinkly mounted on the inner cylinder (222) of the machine base. The front end ring (224) is welded to the other end of the inner cylinder (222). The outer circle dimensions of the core (223), the front end ring (224), and the rear end ring (225) are preset design dimensions after machining. The outer plate (221) is heat-shrinkly mounted on the core (223), the front end ring (224), and the rear end ring (225). On the ring (225); the outer diameter of the front ring (224) is larger than the inner diameter of the outer plate (221), and is used to block the outer plate (221); the outer diameter of the core (223) and the front ring (224) is equal to the inner diameter of the outer plate (221); a wire guide sleeve (226) for waterproofing is provided at the wire outlet position of the inner cylinder (222) of the base; a wire guide hole (226) is provided at the corresponding position of the wire outlet of the outer plate (221) and the inner cylinder (222) of the base. 7); The lower part of the outer plate (221) is provided with a water leakage hole (228), which is used to drain water from the welded joint of the connecting pipe; the lead wire (229) of the base (220) passes through the wire sleeve (226) and the wire hole (227) and extends to the outside of the base (220); one end of the water inlet and outlet pipe (2210) of the base (220) is connected to the core (223), and the other end extends to the outside of the base (220).

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