CN112983857A

CN112983857A - Corrosion-resistant electric fan

Info

Publication number: CN112983857A
Application number: CN202110443241.3A
Authority: CN
Inventors: 周培良; 汪平; 冉建康
Original assignee: Ningbo Anchor Driving Technology Co ltd
Current assignee: Ningbo Anchor Driving Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-06-18

Abstract

The invention discloses a corrosion-resistant electric fan, which relates to the technical field of electric fans and aims to solve the problem of poor gas corrosion resistance of the conventional electric fan; the rotor assembly is arranged in the rotor chamber and is connected with the impeller above the rotor chamber, and the stator assembly is arranged in the stator chamber. The invention can completely isolate the stator assembly from the gas leaked into the motor, improves the working reliability of the electric fan when conveying corrosive gas, and avoids the problem of motor performance reduction caused by the fact that the corrosive gas enters the stator area to corrode the stator coil due to the abrasion of sealing.

Description

Corrosion-resistant electric fan

Technical Field

The invention relates to the field of electric fans, in particular to a corrosion-resistant electric fan.

Background

The existing electric fan mostly adopts a motor to drive an impeller to pump gas. Wherein, the impeller is fixedly connected on the rotor shaft and is arranged in the fan cover; the housing receives and supports the stator and dissipates heat generated by operation of the stator to the atmosphere or environment. Some electric blowers are also required to operate in harsh environments including, but not limited to, high humidity environments, corrosive gas environments, corrosive gases such as chlorine dioxide, hydrogen peroxide containing gases, and the like.

However, the prior art has the following problems: there is the passageway between the fluid chamber of motor and impeller, because of the pump sending be gaseous, sealing device can not avoid gas leakage to the motor inside well, and because the fan rotational speed is very high, sealing device can wear and tear the inefficacy after using a period, and gaseous gets into motor stator coil region through the passageway, corrodes the insulating layer of coil, causes the short circuit and burns out the motor, has restricted electric fan's use under the corrosive environment. Accordingly, it would be desirable to provide an electric fan with enhanced sealing properties, particularly for use in transporting corrosive gases.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a corrosion-resistant electric fan, which adopts the following technical scheme:

the invention relates to a corrosion-resistant electric fan which comprises a fan cover, an impeller, a rotor assembly, a casing, a stator assembly and an end cover, wherein the fan cover, the casing and the end cover are sequentially connected together, the cross section of the casing is of a bow-shaped structure, a rotor cabin and a stator cabin which are coaxial and are not independently communicated are arranged on the casing, the stator cabin is annularly enclosed on the outer side of the rotor cabin, and the opening directions of the stator cabin and the rotor cabin are opposite;

the rotor assembly is arranged in the rotor chamber and connected with the impeller, and the stator assembly is arranged in the stator chamber.

Furthermore, a plurality of grooves convenient for heat dissipation of the stator assembly are formed in the inner wall of the rotor cabin.

Furthermore, the grooves are axial grooves and are uniformly distributed along the circumferential direction; or the groove is a spiral groove formed along the axial direction.

Furthermore, the rotor assembly comprises a supporting shaft, a rotor shaft and magnetic steel,

the magnetic steel is sleeved and fixed on the rotor shaft, the upper part of the rotor shaft is connected with the impeller, and the rotor shaft is sleeved and fixed on the supporting shaft;

the upper end of the supporting shaft is rotatably connected to a first bearing seat through a first bearing, a supporting part is arranged on the upper end surface of the first bearing seat, the upper end of the supporting part is connected to the wind shield, and the lower end of the supporting part is connected to the first bearing seat;

the lower end of the supporting shaft is rotatably connected to a second bearing seat through a second bearing, and the second bearing seat is fixed to the bottom of the rotor cabin.

Furthermore, the rotor assembly comprises a support shaft, a rotor shaft and magnetic steel;

the magnetic steel is sleeved and fixed on the rotor shaft, the upper part of the rotor shaft is connected with the impeller, and the rotor shaft is rotatably connected to the supporting shaft through a third bearing;

the upper end of the supporting shaft is arranged on the first shaft seat, the upper end surface of the first shaft seat is provided with a supporting part, the upper end of the supporting part is connected to the wind hood, and the lower end of the supporting part is connected to the first shaft seat;

the lower end of the supporting shaft is arranged on a second shaft seat, and the second shaft seat is fixed at the bottom of the rotor cabin.

Furthermore, the device comprises a controller, wherein the controller is positioned in a reserved groove of the buckling end face of the end cover.

Further, the stator assembly comprises an annular iron core and a coil, and the inner circular wall of the annular iron core is attached to the inner circular bulkhead of the stator cabin; and/or the presence of a gas in the gas,

and the outer circular wall of the annular iron core is attached to the outer ring annular bulkhead of the stator cabin.

Furthermore, the fan housing, the casing and the end cover are sequentially connected together through bolts which are annularly arranged, and the threaded ends of the bolts penetrate through the fan housing and the casing and then are in threaded connection with the end cover.

Compared with the prior art, the invention has the beneficial technical effects that:

the invention can completely isolate the stator assembly from the gas leaked into the motor, improves the working reliability of the electric fan when conveying corrosive gas, and avoids the problem of motor performance reduction caused by the fact that the corrosive gas enters the stator area to corrode the stator coil due to the abrasion of sealing.

Drawings

The invention is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic structural diagram of a corrosion-resistant electric blower according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of a corrosion-resistant electric blower according to a second embodiment of the present invention;

FIG. 3 is a schematic structural view of a corrosion-resistant electric blower according to a third embodiment of the present invention;

description of reference numerals: 1. a fan housing; 2. an impeller; 3. a rotor assembly; 301. a support shaft; 302. a rotor shaft; 303. magnetic steel; 4. a housing; 401. a rotor compartment; 402. a stator compartment; 5. a stator assembly; 501. an annular iron core; 502. a coil; 6. an end cap; 7. a groove; 8. a first bearing; 9. a first bearing housing; 10. a support portion; 11. a second bearing; 12. a second bearing housing; 13. a third bearing; 14. a first shaft seat; 15. a second shaft base; 16. a controller; 17. and (4) bolts.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Example one

As shown in fig. 1, an embodiment of the present invention discloses a corrosion-resistant electric blower, which includes a fan housing 1, an impeller 2, a rotor assembly 3, a casing 4, a stator assembly 5, and an end cover 6. The fan cover 1 is provided with an air inlet and an air outlet, the impeller 2 is positioned in the fan cover 1, and the impeller 2 is directly driven by the rotor assembly 3.

The wind shield 1, the casing 4 and the end cover 6 are sequentially and hermetically connected together, as a possible implementation mode, the wind shield 1, the casing 4 and the end cover 6 are sequentially connected together through bolts 17 which are annularly arranged, and threaded ends of the bolts 17 penetrate through reserved mounting holes in the wind shield 1 and the casing 4 and then are in threaded connection with threaded holes in the end cover 6.

In order to improve the sealing performance of the motor stator region, the cross section of the casing 4 in the embodiment adopts a bow-shaped structural design, so that a rotor cabin 401 and a stator cabin 402 which are coaxial and are not independently communicated are formed on the casing 4, the stator cabin 402 annularly surrounds the outer side of the rotor cabin 401, and the opening directions of the rotor cabin 401 and the stator cabin 402 are opposite; the rotor assembly 3 is disposed in the rotor compartment 401 and connected to the impeller 2 above, and the stator assembly 5 is disposed in the stator compartment 402.

When the electric fan works, gas pumped by the impeller 2 enters through the air inlet of the fan cover 1, and even if corrosive gas leaks into the motor, the corrosive gas cannot enter the space of the stator assembly, so that the sealing performance of the motor stator area is enhanced, the stator assembly cannot be contacted with the leaked gas completely due to the design of the arched shell 4, the reliability of the motor during working is improved, and the electric fan is particularly suitable for the severe environment for conveying the corrosive gas. Meanwhile, the rotor cabin 401 and the stator cabin 402 are separated by the casing wall body, and the casing wall body has a certain thickness, so that the air gap is increased, the air gap magnetic flux density wave and the radial force wave are reduced, the vibration of the motor is effectively reduced, and the NVH performance of the motor is improved.

The stator assembly 5 comprises an annular iron core 501 and a coil 502, the annular iron core 501 can be filled in the rotor cabin 401 in three matching modes, and only the inner circular wall of the annular iron core 501 is attached to the inner circular cabin wall of the stator cabin 402 in the first mode; in the second mode, only the outer circular wall of the annular iron core 501 is attached to the outer circular bulkhead of the stator cabin 402; in the third mode, the inner circular wall of the annular core 501 is attached to the inner circular bulkhead of the stator compartment 402, and the outer circular wall of the annular core 501 is attached to the outer circular bulkhead of the stator compartment 402. In the present embodiment, the third mode is adopted.

When the inner circle and the outer circle of the annular iron core 501 are respectively contacted with the inner wall of the rotor cabin 401 at the same time, the interlayer of the casing 4 is filled, so that the rigidity of the casing 4 is obviously improved, and the heat dissipation and NVH performance of the motor are greatly improved.

The electric fan further comprises a controller 16, the controller 16 is located in a reserved groove in the buckling end face of the end cover 6, a closed space is formed between the reserved groove and the shell 4, the requirement for working in a severe environment is met, and the reliability of the motor, a control circuit and the like can be greatly improved.

Example two

As shown in fig. 2, an embodiment of the present invention discloses a corrosion-resistant electric blower, which includes a fan housing 1, an impeller 2, a rotor assembly 3, a casing 4, a stator assembly 5, and an end cover 6. The structures of the fan housing 1, the impeller 2, the casing 4, the stator assembly 5 and the end cover 6 are the same as those of the first embodiment, and are not described herein.

As a possible implementation, the rotor assembly 3 includes a support shaft 301, a rotor shaft 302, and a magnetic steel 303; the upper part of the rotor shaft 302 is connected with the impeller 2; the rotor shaft 302 and the magnetic steel 303 can be bonded, sleeved and fixed together through glue, and the rotor shaft 302 is rotatably connected to the support shaft 301 through a third bearing 13; the upper end of the supporting shaft 301 is fixed on the first shaft seat 14, the upper end surface of the first shaft seat 14 is provided with a supporting part 10, the upper end of the supporting part 10 is connected on the fan housing 1, and the lower end is connected on the first shaft seat 14. The fan housing 1, the supporting portion 10 and the first shaft seat 14 may be integrally formed by injection molding. The lower end of the support shaft 301 is fixed to the second shaft base 15, and the second shaft base 15 is integrally formed at the bottom of the rotor compartment 401.

As a possible implementation, the impeller 2 and the rotor shaft 302 may be both metal pieces, and are made into an integral piece by machining; or, the rotor shaft 302 and the impeller 2 may be made of non-metal parts, such as plastic steel, and are integrally formed by injection molding. Because the rotor assembly 3 and the impeller 2 are mainly made of corrosion-resistant materials, a good corrosion-resistant effect can be achieved, and further protection is not needed.

As a possible implementation manner, the upper end and the lower end of the supporting shaft 301 are provided with key slots, and the ends of the supporting shaft 301 are fixed on the first shaft seat 14 and the second shaft seat 15 respectively in a shaft key fit manner, so as to prevent the supporting shaft 301 from rotating. In this embodiment, by means of the two-point supporting manner of the first shaft seat 14 and the second shaft seat 15, the rigidity of the supporting shaft 301 is increased, so as to provide better support for the rotor assembly 3 rotating thereon, and ensure the NVH performance of the motor.

EXAMPLE III

As shown in fig. 3, an embodiment of the present invention discloses a corrosion-resistant electric blower, which includes a fan housing 1, an impeller 2, a rotor assembly 3, a casing 4, a stator assembly 5, and an end cover 6. The structures of the fan housing 1, the impeller 2, the casing 4, the stator assembly 5 and the end cover 6 are the same as those of the first embodiment, and are not described herein.

As a possible implementation, the rotor assembly 3 includes a support shaft 301, a rotor shaft 302, and a magnetic steel 303, and an upper portion of the rotor shaft 302 is connected to the impeller 2. The rotor shaft 302 is sleeved and fixed on the support shaft 301, and the two can be bonded and fixed through glue. The upper end of the support shaft 301 is rotatably connected to the first bearing seat 9 through the first bearing 8, the upper end surface of the first bearing seat 9 is provided with a support portion 10, the upper end of the support portion 10 is connected to the fan housing 1, the lower end of the support portion 10 is connected to the first bearing seat 9, and the first bearing seat 9, the support portion 10 and the fan housing 1 can be formed by integral injection molding. The lower end of the support shaft 301 is rotatably connected to a second bearing housing 12 through a second bearing 11, and the second bearing housing 12 is integrally formed at the bottom of the rotor compartment 401.

In the present embodiment, the supporting shaft 301 supports the entire rotor assembly 3 by means of the first bearing seat 9 and the second bearing seat 12, so that the NVH performance of the motor is ensured.

In order to improve the heat dissipation performance of the stator assembly 5, a plurality of grooves 7 facilitating the heat dissipation of the stator assembly 5 are formed on the inner wall of the rotor compartment 401. The grooves 7 are axial grooves and are uniformly distributed along the circumferential direction; or the groove 7 is a spiral groove formed along the axial direction. In the present embodiment, the groove 7 is in the form of an axial groove. It should be noted that, in addition to the present embodiment, the inner wall of the rotor compartment 401 of the first and second embodiments may be provided with the groove 7.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. The utility model provides a corrosion-resistant electric fan, includes fan housing (1), impeller (2), rotor assembly (3), casing (4), stator assembly (5) and end cover (6), its characterized in that: the fan cover (1), the casing (4) and the end cover (6) are sequentially connected together, the cross section of the casing (4) is of a bow-shaped structure, the casing (4) is provided with a rotor cabin (401) and a stator cabin (402) which are coaxial and are not independently communicated, the stator cabin (402) is annularly enclosed on the outer side of the rotor cabin (401), and the opening directions of the rotor cabin and the stator cabin are opposite;

the rotor assembly (3) is arranged in the rotor chamber (401) and connected with the impeller (2), and the stator assembly (5) is arranged in the stator chamber (402).

2. The corrosion-resistant electric blower of claim 1, wherein: a plurality of grooves (7) convenient for heat dissipation of the stator assembly (5) are formed in the inner wall of the rotor cabin (401).

3. The corrosion-resistant electric blower of claim 2, wherein: the grooves (7) are axial grooves and are uniformly distributed along the circumferential direction; or,

the groove (7) is a spiral groove which is arranged along the axial direction.

4. The corrosion-resistant electric blower of claim 1, wherein: the rotor assembly (3) comprises a support shaft (301), a rotor shaft (302) and magnetic steel (303),

the magnetic steel (303) is sleeved and fixed on the rotor shaft (302), the upper part of the rotor shaft (302) is connected with the impeller (2), and the rotor shaft (302) is sleeved and fixed on the supporting shaft (301);

the upper end of the supporting shaft (301) is rotatably connected to a first bearing seat (9) through a first bearing (8), a supporting part (10) is arranged on the upper end face of the first bearing seat (9), the upper end of the supporting part (10) is connected to the fan cover (1), and the lower end of the supporting part is connected to the first bearing seat (9);

the lower end of the supporting shaft (301) is rotatably connected to a second bearing seat (12) through a second bearing (11), and the second bearing seat (12) is fixed to the bottom of the rotor cabin (401).

5. The corrosion-resistant electric blower of claim 1, wherein: the rotor assembly (3) comprises a support shaft (301), a rotor shaft (302) and magnetic steel (303);

the magnetic steel (303) is sleeved and fixed on the rotor shaft (302), and the upper part of the rotor shaft (302) is connected with the impeller (2); the rotor shaft (302) is rotatably connected to the supporting shaft (301) through a third bearing (13);

the upper end of the supporting shaft (301) is arranged on a first shaft seat (14), a supporting part (10) is arranged on the upper end face of the first shaft seat (14), the upper end of the supporting part (10) is connected to the fan cover (1), and the lower end of the supporting part is connected to the first shaft seat (14);

the lower end of the supporting shaft (301) is arranged on a second shaft seat (15), and the second shaft seat (15) is fixed to the bottom of the rotor cabin (401).

6. The corrosion-resistant electric blower of claim 1, wherein: the device comprises a controller (16), wherein the controller (16) is positioned in a reserved groove of the buckling end face of the end cover (6).

7. The corrosion-resistant electric blower of claim 1, wherein: the stator assembly (5) comprises an annular iron core (501) and a coil (502), wherein the inner circular wall of the annular iron core (501) is attached to the inner circular bulkhead of the stator cabin (402); and/or the presence of a gas in the gas,

the outer circular wall of the annular iron core (501) is attached to the outer ring annular bulkhead of the stator cabin (402).

8. The corrosion-resistant electric blower of claim 1, wherein: the fan housing (1), the casing (4) and the end cover (6) are sequentially connected together through bolts (17) which are annularly arranged, and the threaded ends of the bolts (17) penetrate through the rear of the fan housing (1) and the casing (4) and are in threaded connection with the end cover (6).