CN217327770U

CN217327770U - High temperature resistant direct current brushless fan

Info

Publication number: CN217327770U
Application number: CN202221243030.1U
Authority: CN
Inventors: 饶海生; 周培良; 汪平
Original assignee: Nanjing Anchor Fluid Technology Co ltd
Current assignee: Nanjing Anchor Fluid Technology Co ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-08-30
Anticipated expiration: 2032-05-23

Abstract

The utility model discloses a high temperature resistance direct current brushless fan, including the fan spiral case, main fan impeller, the cooling fan shell, the cooling fan impeller, the motor main casing body, stator assembly and rotor assembly, the rotor assembly, cooling fan impeller and main fan impeller are in the same place through the main shaft series connection, the cooling fan shell is provided with the baffle in the one side that is close to the motor main casing body, it has a plurality of first air ducts to embed on the baffle, it has a plurality of second air ducts to embed on the cooling fan shell, it has a plurality of third air ducts to embed on the motor main casing body, each first air duct, second air duct and third air duct one-to-one intercommunication of each other, the gas outlet of first air duct and the inner chamber intercommunication of cooling fan shell, the air inlet and the external intercommunication of third air duct. The utility model discloses a cooling fan's setting can realize the quick effectual heat dissipation to the motor, and cooling fan power is provided by the motor, need not to increase extra power supply, and is structural compacter, and use cost is lower.

Description

High temperature resistant direct current brushless fan

Technical Field

The utility model relates to a fan field especially relates to a high temperature resistance direct current brushless fan.

Background

The existing small-sized DC brushless fan adopts the integrated design of a motor and a fan, wherein the motor is a high-speed brushless DC motor, and the rotating speed is up to 3-10 ten thousand revolutions per minute. The fan has the characteristics of compact overall structure, small volume, high wind pressure, large flow and the like, and the fan usually adopts a natural mode to dissipate heat. Because of the limitation of the characteristics of the fan, the current fan can convey gas with the temperature lower than 80 ℃; it is not suitable for the operation place for conveying high-temperature gas. The high temperature gas conducts heat to the bearing and motor components, causing the bearing and motor to be damaged and unable to work properly.

SUMMERY OF THE UTILITY MODEL

Based on the above problem the utility model aims at providing a high temperature resistance direct current brushless fan, the utility model discloses a following technical scheme:

the utility model relates to a high temperature resistant direct current brushless fan, including fan spiral case and motor main casing, be provided with main fan impeller in the inner chamber of fan spiral case, be provided with stator assembly and rotor assembly in the inner chamber of motor main casing, the stator assembly is fixed in the motor main casing, rotor assembly and main fan impeller are connected together through the main shaft in series; a cooling fan shell is arranged between the fan volute and the main shell of the motor, a cooling fan impeller is arranged in an inner cavity of the cooling fan shell, and the cooling fan impeller is fixedly connected with the main shaft; a cooling fan air outlet is formed in the outer wall of the cooling fan shell, a partition plate is arranged on one side, close to the main motor shell, of the cooling fan shell, and the partition plate is used for spatially separating the cooling fan impeller from the rotor assembly; the motor is characterized in that a plurality of first air passages are arranged in the partition plate, a plurality of second air passages are arranged in the cooling fan shell, a plurality of third air passages are arranged in the motor main shell, the first air passages, the second air passages and the third air passages are communicated in a one-to-one correspondence mode, the air outlets of the first air passages are communicated with the inner cavity of the cooling fan shell, and the air inlets of the third air passages are communicated with the outside.

Preferably, the fan volute comprises a left volute, a right volute, a main fan air inlet and a main fan air outlet, and the right volute is integrally formed on the cooling fan casing.

Preferably, the main blower air inlet is arranged on the left volute, the main blower air outlet comprises a left half port and a right half port, the left half port is integrally formed with the left volute, and the right half port is integrally formed with the right volute.

Preferably, bearings are arranged on two sides of the rotor assembly, and the main shaft is respectively in rotating connection with the partition plate and the motor main shell through the two bearings.

Preferably, the air outlet of the first air passage is close to the main shaft.

Preferably, the end of the motor main shell is provided with a small hole communicated with the inner cavity.

Preferably, the first air passage is provided with a plurality of first small holes communicated with the inner cavity of the main shell of the motor, and the third air passage is provided with a plurality of second small holes communicated with the inner cavity of the main shell of the motor.

Compared with the prior art, the utility model discloses a beneficial technological effect:

the utility model can realize quick and effective heat dissipation of the motor through the arrangement of the cooling fan, the power of the cooling fan is provided by the motor, no additional power source is needed to be added, the structure is more compact, and the use cost is lower; meanwhile, the air flow direction of the main fan wheel is opposite to that of the cooling fan, the cooling fan can reduce the axial force applied to the main shaft, the bearing load is reduced, the service life of the bearing is prolonged, and meanwhile, the reduction of the vibration noise of the fan is facilitated.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

Fig. 1 is a schematic view of an internal structure of a high temperature resistant dc brushless fan according to an embodiment of the present invention;

fig. 2 is a schematic view illustrating an exploded state of a motor main casing, a cooling fan casing and a partition plate according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a high temperature resistant dc brushless fan according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fan volute according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an exploded state of the motor main casing, the cooling fan casing and the partition plate according to the second embodiment of the present invention.

Description of reference numerals: 1. a fan volute; 101. a left volute; 102. a right volute; 103. a main fan air inlet; 104. the air outlet of the main fan; 104-1 and a left half port; 104-2, right half mouth; 2. a motor main housing; 3. a main fan impeller; 4. a stator assembly; 5. a rotor assembly; 6. a main shaft; 7. cooling the fan case; 701. a cooling fan outlet; 8. a cooling fan impeller; 9. a partition plate; 10. a first air passage; 11. a second air passage; 12. a third air passage; 13. a bearing; 14. a first aperture; 15. a second aperture.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only 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 limited 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 the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to 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 to 3, the embodiment discloses a high temperature resistant brushless dc fan, which includes a fan volute 1 and a motor main housing 2, a main fan impeller 3 is disposed in an inner cavity of the fan volute 1, a stator assembly 4 and a rotor assembly 5 are disposed in an inner cavity of the motor main housing 2, the stator assembly 4 is fixed in the motor main housing 2, and the rotor assembly 5 and the main fan impeller 3 are connected in series through a main shaft 6.

In order to realize cooling of the fan, a cooling fan shell 7 is arranged between the fan volute 1 and the motor main shell 2, a cooling fan impeller 8 is arranged in an inner cavity of the cooling fan shell 7, and the cooling fan impeller 8 is fixedly connected with the main shaft 6; a cooling fan air outlet 701 is arranged on the outer wall of the cooling fan shell 7, a partition plate 9 is arranged on one side of the cooling fan shell 7 close to the motor main shell 2, and the cooling fan impeller 8 and the rotor assembly 5 are spatially separated by the partition plate 9; the baffle 9 is internally provided with a plurality of first air passages 10, the cooling fan shell 7 is internally provided with a plurality of second air passages 11, the motor main shell 2 is internally provided with a plurality of third air passages 12, each first air passage 10, each second air passage 11 and each third air passage 12 are communicated in a one-to-one correspondence manner, the air outlet of the first air passage 10 is communicated with the inner cavity of the cooling fan shell 7, and the air inlet of the third air passage 12 is communicated with the outside. It should be noted that the communication between the air inlet of the third air passage 12 and the outside means: the external environment may provide the third gas duct 12 with low-temperature gas (or other cooling medium) for cooling.

In the present embodiment, the partition plate 9 is first fixed to the motor main casing 2 by interference crimping, and then the cooling fan case 7 is also fixed to the partition plate 9 and the motor main casing 2 by interference crimping.

It should be noted that, when the fan is in operation, heat is conducted to the motor part through the following two paths: (1) when the fan works, the heat of the sucked high-temperature gas is conducted to the main shaft 6 through the main fan impeller 3 and then conducted to the cooling fan impeller 8 and the rotor assembly 5 through the main shaft 6; (2) when the fan works, the heat of the sucked high-temperature gas is conducted to the cooling fan shell 7 through the fan volute 1 and then conducted to the motor main shell 2.

The utility model discloses a cooling gas transmission route: the motor part drives the main fan impeller 3 through the main shaft 6, the cooling fan impeller 8 rotates, the cooling fan impeller 8 sucks low-temperature gas (or cold medium) from the outside through the communicated first air passage 10, the second air passage 11 and the third air passage 12, the low-temperature gas passes through the third air passage 12, the second air passage 11 and the process of the first air passage 10, the low-temperature gas is cooled through the stator assembly 4 and the rotor assembly 5 in the inner cavity of the main motor shell 2 and is provided with the heat on the partition plate 9, and the gas sucked by the cooling fan impeller 8 is finally discharged through the cooling fan gas outlet 701.

In the present embodiment, as shown in fig. 4, the blower scroll 1 includes a left scroll 101, a right scroll 102, a main blower inlet 103, and a main blower outlet 104, and the right scroll 102 is integrally formed on the cooling fan case 7. The main fan air inlet 103 is arranged on the left volute 101, the main fan air outlet 104 comprises a left half port 104-1 and a right half port 104-2, the left half port 104-1 and the left volute 101 are integrally formed, the right half port 104-2 and the right volute 102 are integrally formed, and after the left volute 101 and the right volute 102 are buckled and connected together, the left half port 104-1 and the right half port 104-2 form a complete main fan air outlet 104.

In the present embodiment, left volute 101 and right volute 102 are fastened together and then fixed together by high temperature resistant glue.

In this embodiment, bearings 13 are disposed on both sides of the rotor assembly 5, the main shaft 6 is rotatably connected to the partition plate 9 and the main housing 2 through the two bearings 13, specifically, an inner ring of the bearing 13 is sleeved on the main shaft 6, and an outer ring is mounted on the main shaft 6

Example two

In this embodiment, the ventilation hole structure is additionally arranged on the motor main shell 2 and the partition plate 9, so that the heat of the rotor and the stator inside the motor can be directly radiated. Specifically, as shown in fig. 5, a plurality of first small holes 14 communicating with the inner cavity of the motor main housing 2 are provided in the first air passage 10, and a plurality of second small holes 15 communicating with the inner cavity of the motor main housing 2 are provided in the third air passage 12.

When the fan works, besides the cooling gas transmission path in the first embodiment, another cooling path is added in the first embodiment: after the cooling fan impeller 8 sucks low-temperature gas into the first air passage 10, the low-temperature gas enters the inner cavity of the motor main shell 2 through the second small holes 15, the low-temperature gas takes away heat of a motor rotor and stator assembly through a gap between a rotor and a stator and an air gap between stator windings, then enters the first small holes 14 in the partition plate 9 and enters the first air passage 10, the low-temperature gas is converged with the gas in the second air passage 11 and then enters the cavity of the cooling fan shell 7, and the cooling fan impeller 8 rotates to finally discharge the gas through the cooling fan air outlet 701.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. A high-temperature-resistant direct-current brushless fan comprises a fan volute (1) and a motor main shell (2), wherein a main fan impeller (3) is arranged in an inner cavity of the fan volute (1), a stator assembly (4) and a rotor assembly (5) are arranged in an inner cavity of the motor main shell (2), the stator assembly (4) is fixed in the motor main shell (2), and the rotor assembly (5) and the main fan impeller (3) are connected in series through a main shaft (6);

the method is characterized in that: a cooling fan shell (7) is arranged between the fan volute (1) and the motor main shell (2), a cooling fan impeller (8) is arranged in an inner cavity of the cooling fan shell (7), and the cooling fan impeller (8) is fixedly connected with the main shaft (6);

a cooling fan air outlet (701) is formed in the outer wall of the cooling fan shell (7), a partition plate (9) is arranged on one side, close to the motor main shell (2), of the cooling fan shell (7), and the cooling fan impeller (8) and the rotor assembly (5) are spatially separated by the partition plate (9);

the motor is characterized in that a plurality of first air passages (10) are arranged in the partition plate (9), a plurality of second air passages (11) are arranged in the cooling fan shell (7), a plurality of third air passages (12) are arranged in the motor main shell (2), the first air passages (10), the second air passages (11) and the third air passages (12) are communicated in a one-to-one correspondence mode, an air outlet of the first air passage (10) is communicated with an inner cavity of the cooling fan shell (7), and an air inlet of the third air passage (12) is communicated with the outside.

2. The high temperature resistant dc brushless fan of claim 1, wherein: the fan volute (1) comprises a left volute (101), a right volute (102), a main fan air inlet (103) and a main fan air outlet (104), and the right volute (102) is integrally formed on the cooling fan shell (7).

3. The high temperature resistant dc brushless fan of claim 2, wherein: the main fan air inlet (103) is arranged on the left volute (101), the main fan air outlet (104) comprises a left half port (104-1) and a right half port (104-2), the left half port (104-1) and the left volute (101) are integrally formed, and the right half port (104-2) and the right volute (102) are integrally formed.

4. The high temperature resistant dc brushless fan of claim 1, wherein: both sides of rotor assembly (5) all are provided with bearing (13), main shaft (6) through two bearing (13) respectively with baffle (9), motor main casing body (2) rotate the connection.

5. The high temperature resistant dc brushless fan of claim 1, wherein: the air outlet of the first air passage (10) is close to the main shaft (6).

6. The high temperature resistant dc brushless fan of claim 1, wherein: the first air passage (10) is internally provided with a plurality of first small holes (14) communicated with the inner cavity of the motor main shell (2), and the third air passage (12) is internally provided with a plurality of second small holes (15) communicated with the inner cavity of the motor main shell (2).