阅读说明：本技术 一种大流量轻量化轴流风机 (Large-traffic lightweight axial fan ) 是由 李诗徉 蒋洪涛 叶豪杰 祁忠祥 张子澄 于 2021-11-03 设计创作，主要内容包括：本发明公开了一种大流量轻量化轴流风机,包括外壳；内壳,位于所述外壳内侧且中心线与所述外壳中心线重合；导叶叶片,设有多个,多个所述导叶叶片环绕所述内壳间隔设置,且所述导叶叶片一端与外壳连接,另一端与内壳连接；叶轮,可转动设于所述外壳内,且位于多个所述导叶叶片的进风一侧；驱动部件,包括定子组件及转子组件,所述定子组件、转子组件均位于所述内壳内侧,且所述转子组件与叶轮相关联以驱动叶轮转动。本发明通过本发明中内壳与多个导叶叶片组成传统风机的导叶结构,并且内壳与驱动部件组合形成电机结构,简化风机的结构,且大幅度减少风机的重量,适用于极端轻量化的场合,并且导叶叶片作为内壳的散热筋,提高散热性能。(The invention discloses a large-flow lightweight axial flow fan, which comprises a shell; the inner shell is positioned on the inner side of the outer shell, and the center line of the inner shell is superposed with the center line of the outer shell; the guide vane blades are arranged around the inner shell at intervals, one end of each guide vane blade is connected with the outer shell, and the other end of each guide vane blade is connected with the inner shell; the impeller is rotatably arranged in the shell and is positioned on the air inlet side of the guide vane blades; and the driving component comprises a stator component and a rotor component, the stator component and the rotor component are both positioned inside the inner shell, and the rotor component is associated with the impeller to drive the impeller to rotate. According to the invention, the guide vane structure of the traditional fan is formed by the inner shell and the guide vane blades, and the inner shell and the driving part are combined to form the motor structure, so that the structure of the fan is simplified, the weight of the fan is greatly reduced, the fan is suitable for extremely light occasions, and the guide vane blades are used as heat dissipation ribs of the inner shell, so that the heat dissipation performance is improved.)

1. A large-traffic lightweight axial fan which characterized in that: comprises that

A housing (11);

the inner shell (12) is positioned inside the outer shell (11) and the central line of the inner shell coincides with the central line of the outer shell (11);

the guide vane blades (13) are arranged in a plurality, the guide vane blades (13) are arranged around the inner shell (12) at intervals, one end of each guide vane blade (13) is connected with the outer shell (11), and the other end of each guide vane blade (13) is connected with the inner shell (12);

the impeller (20) is rotatably arranged in the shell (11) and is positioned on the air inlet side of the guide vane blades (13);

the driving component (30) comprises a stator assembly (31) and a rotor assembly (32), the stator assembly (31) and the rotor assembly (32) are both positioned inside the inner shell (12), and the rotor assembly (32) is associated with the impeller (20) to drive the impeller (20) to rotate.

2. The high-flow lightweight axial flow fan according to claim 1, characterized in that: the stator assembly (31) is fixedly arranged on the inner wall of the inner shell (12).

3. The large-flow lightweight axial flow fan according to claim 2, characterized in that: the stator assembly (31) is sleeved on the rotor assembly (32), the rotor assembly (32) is connected with an output shaft (33), and at least part of the output shaft (33) penetrates through the inner shell (12) and is connected with the impeller (20).

4. The large-flow lightweight axial flow fan according to claim 3, characterized in that: stator module (31) include stator core (311) and around establishing stator winding (312) on stator core (311), rotor subassembly (32) include rotor core (321) and locate permanent magnet on rotor core (321).

5. The large-flow lightweight axial flow fan according to claim 3, characterized in that: the impeller (20) comprises an impeller disc (21) and impeller blades (22), the impeller disc (21) is sleeved on the output shaft (33) and is in rotation stopping connection with the output shaft (33), and the outer diameter of the inner shell (12) is the same as that of the impeller disc (21).

6. The high-flow lightweight axial flow fan according to claim 1, characterized in that: the impeller structure is characterized in that a front end cover (121) is arranged at one end, facing the impeller (20), of the inner shell (12), a rear end cover (122) is arranged at one end, far away from the impeller (20), of the inner shell (12), all the front end cover (121), the rear end cover (122) and the inner shell (12) are encircled to form an accommodating cavity, and the rotor assembly (32) and the stator assembly (31) are located in the accommodating cavity.

7. The large-flow lightweight axial flow fan according to claim 6, characterized in that: the front end cover (121) and the inner shell (12) are integrally cast, and the rear end cover (122) is detachably connected with the inner shell (12).

8. The large-flow lightweight axial flow fan according to claim 3, characterized in that: both ends of the rotor assembly (32) are respectively connected with a side plate (34), and the side plates (34) are in rotation stopping connection with the output shaft (33).

9. The large-flow lightweight axial flow fan according to claim 3, characterized in that: the motor rotor is characterized in that a first diameter expanding portion (331) is arranged on the output shaft (33), one end, facing the impeller (20), of the rotor assembly (32) is abutted to the first diameter expanding portion (331), a limiting sleeve (35) is further connected to the output shaft (33), and the limiting sleeve (35) is abutted to one end, far away from the impeller (20), of the rotor assembly (32).

10. The large-flow lightweight axial flow fan according to claim 9, characterized in that: a stop washer (36) sleeved on the output shaft (33) is further arranged between the limiting sleeve (35) and the rotor iron core (321), and the stop washer (36) is provided with an inner stop lug (361) matched with the output shaft (33) and at least one outer stop lug (362) matched with the limiting sleeve (35).

Technical Field

The invention belongs to the technical field of fans, and particularly relates to a large-flow light axial flow fan.

Background

The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Modern fans are widely used in ventilation, dust extraction and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

Fans are one of the key components of a vehicle cooling system, the operating state of which has a critical impact on vehicle performance and is also safety related. In extremely light application occasions, such as cooling and heat dissipation of military vehicles and tanks, the requirement on the weight of the fan is very strict due to the limited rating of vehicles, however, the weight of the traditional fan is up to 150kg under the power of 7KW, and the volume is larger; if the weight of the fan is reduced, the power of the fan is limited, and the cooling heat dissipation performance is affected.

Disclosure of Invention

The invention provides a large-flow light axial flow fan in order to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a large-flow lightweight axial flow fan comprises

A housing;

the inner shell is positioned on the inner side of the outer shell, and the center line of the inner shell is superposed with the center line of the outer shell;

the guide vane blades are arranged around the inner shell at intervals, one end of each guide vane blade is connected with the outer shell, and the other end of each guide vane blade is connected with the inner shell;

the impeller is rotatably arranged in the shell and is positioned on the air inlet side of the guide vane blades;

and the driving component comprises a stator component and a rotor component, the stator component and the rotor component are both positioned inside the inner shell, and the rotor component is associated with the impeller to drive the impeller to rotate.

Optionally, the stator assembly is fixedly arranged on the inner wall of the inner shell.

Optionally, the stator assembly is sleeved on the rotor assembly, the rotor assembly is connected to an output shaft, and at least a portion of the output shaft penetrates through the inner casing and is connected to the impeller.

Optionally, the stator assembly includes a stator core and a stator winding wound on the stator core, and the rotor assembly includes a rotor core and a permanent magnet disposed on the rotor core.

Optionally, the impeller includes an impeller disc and impeller blades, the impeller disc is sleeved on the output shaft and is in rotation-stopping connection with the output shaft, and the outer diameter of the inner shell is the same as the outer diameter of the impeller disc. Through the arrangement, the air pressure loss is reduced in the process that the air flow flows from the impeller to the surface of the inner shell.

Optionally, a front end cover is arranged at one end, facing the impeller, of the inner shell, a rear end cover is arranged at one end, facing away from the impeller, of the inner shell, all the front end covers, the rear end covers and the inner shell surround to form an accommodating cavity, and the rotor assembly and the stator assembly are located in the accommodating cavity.

Optionally, the front end cover and the inner shell are integrally cast, and the rear end cover and the inner shell are detachably connected. Through the integrative casting shaping of front end housing and inner shell for fan compact structure reduces the whole volume of fan.

Optionally, both ends of the rotor assembly are respectively connected with a side plate, and the side plates are connected with the output shaft in a rotation stopping manner. Through above structure setting, protect rotor subassembly, avoid the rotor subassembly to receive the collision damage.

Optionally, a first diameter expanding portion is arranged on the output shaft, the rotor assembly abuts against the first diameter expanding portion towards one end of the impeller, a limiting sleeve is further connected to the output shaft, and the limiting sleeve abuts against one end, far away from the impeller, of the rotor assembly.

Optionally, a stop washer sleeved on the output shaft is further disposed between the limiting sleeve and the rotor core, and the stop washer has an inner stop lug matched with the output shaft and at least one outer stop lug matched with the limiting sleeve.

In conclusion, the invention has the following beneficial effects:

1. the inner shell and the guide vanes form a guide vane structure of a traditional fan, and the inner shell and the driving part are combined to form a motor structure, so that the inner shell can be used as a guide vane disc and a shell of the driving part, a motor used on the traditional fan is combined with the guide vanes, the structure of the fan is simplified, the weight of the fan is greatly reduced, and the fan is suitable for extremely light-weighted occasions, such as cooling and heat dissipation of military vehicles and military tanks, and more other articles, such as weapons and ammunitions, can be placed on the military vehicles and the military tanks under the same rated load condition by reducing the weight of the fan;

2. the guide vane blades are used as the heat dissipation ribs of the inner shell, and tests prove that the air outlet speed of the impeller in the working state of the fan can reach 20-40m/s, high-speed airflow passes through the surface of the inner shell, heat generated by a driving part is taken away quickly, the heat dissipation performance is improved, and corresponding heat dissipation devices of the driving part are reduced; in addition, high-speed airflow generated by the impeller is directly blown to the surface of the inner shell, so that wind pressure loss is avoided while heat dissipation is realized;

3. compared with the traditional motor which is fixedly connected through a flange plate, the guide vane blade is used as the structural support of the inner shell to further support the driving part, so that the structural strength is improved, and the fan is more stable to operate; the guide vane blade not only serves as a structural support of the inner shell, but also improves the heat dissipation effect of the inner shell, so that the overall structure of the fan is more compact, and the overall weight of the fan is further reduced.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a perspective view from another perspective of the present invention.

Fig. 3 is a cutaway perspective view of fig. 1.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is an enlarged view at B in fig. 3.

FIG. 6 is a perspective view of the outer casing, inner casing, and guide vanes of FIG. 1.

Fig. 7 is an exploded view of the stop collar and stop washer of fig. 1 in combination.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Referring to fig. 1 to 3, a large flow lightweight axial flow fan includes an outer casing 11, an inner casing 12, a guide vane blade 13, an impeller 20, and a driving part 30; the shell 11 is cylindrical, and two ends of the shell 11 are respectively provided with a connecting flange 111, so that the fan can be conveniently installed; a reinforcing rib 112 is connected between the two connecting flanges 111, so that the strength of the shell 11 is improved; the inner shell 12 is positioned inside the outer shell 11, the central line of the inner shell 12 coincides with the central line of the outer shell 11, and the inner shell 12 and the outer shell 11 are connected through a plurality of guide vane blades 13; a plurality of guide vane blades 13 are arranged around the inner shell 12, one end of each guide vane blade 13 is welded with the inner shell 12, and the other end of each guide vane blade 13 is welded with the outer shell 11, so that the inner shell 12 is fixed on the outer shell 11 through the guide vane blades 13; the impeller 20 is rotatably arranged in the shell 11 and is positioned on the air inlet side of the guide vane blades 13; the driving member 30 is associated with the inner casing 12 and the impeller 20 and is used for driving the impeller 20 to rotate relative to the outer casing 11, the driving member 30 includes a stator assembly 31 and a rotor assembly 32, the stator assembly 31 and the rotor assembly 32 are both located inside the inner casing 12, and the rotor assembly 32 is associated with the impeller 20 to drive the impeller 20 to rotate.

Referring to fig. 2, in some embodiments, the driving component is composed of a stator assembly 31, a rotor assembly 32 and an output shaft 33, the stator assembly 31 is sleeved on the rotor assembly 32, the rotor assembly 32 is connected with the output shaft 33, the output shaft 33 at least partially penetrates through the inner casing 12 and is connected with the impeller 20, the output shaft 33 rotates to drive the impeller 20 to rotate, and the stator assembly 31 is fixedly arranged on the inner wall of the inner casing 12, and the inner casing 12 serves as a housing of the driving component.

Referring to fig. 2, in some embodiments, the stator assembly 31 includes a stator core 311 and a stator winding 312 wound on the stator core 311, the stator winding 312 generates a magnetic field to act on the rotor assembly to form a magnetoelectric dynamic rotation torque, so that the rotor assembly 32 rotates relative to the stator assembly; the rotor assembly 32 includes a rotor core 321 and a permanent magnet (not shown) disposed on the rotor core 321, and the stator core 311 is connected to the output shaft 33. The stator assembly 31, the rotor assembly 32, the inner shell 12 and the output shaft 33 form a conventionally defined permanent magnet motor, the permanent magnet motor has the characteristic of high power density, the volume of the permanent magnet motor is smaller than that of an asynchronous motor under the condition of generating the same power, and the permanent magnet motor is suitable for occasions with limited installation space; of course, in other embodiments, the stator assembly 31 and the rotor assembly 32 may be arranged in other operation modes of the motor, and are not limited to permanent magnet motors.

The inner shell 12 and the guide vane blades 13 form a guide vane structure of a traditional fan, the inner shell 12 and the driving part 30 are combined to form a motor structure, so that the inner shell 12 serves as a guide vane disc and a shell of the driving part 30, a motor and a guide vane used on the traditional fan are combined, the structure of the fan is simplified, the weight of the fan is greatly reduced, and the fan is suitable for extremely light-weighted occasions, such as cooling and heat dissipation of military vehicles and military tanks, and more other articles, such as weapons and ammunition, can be placed on the military vehicles and the military tanks under the same rated load condition by reducing the weight of the fan; meanwhile, the guide vane blades 13 are used as heat dissipation ribs of the inner shell 12, and tests show that the air outlet speed of the impeller 20 in the working state of the fan can reach 20-40m/s, high-speed airflow passes through the surface of the inner shell 12, heat generated by the driving part 30 is taken away quickly, heat dissipation performance is improved, corresponding heat dissipation devices of the driving part 30 are reduced, and the overall weight of the fan is further reduced; the high-speed airflow generated by the impeller 20 is directly blown on the surface of the inner shell 12, so that the wind pressure loss is avoided while the heat is dissipated; in addition, the inner shell 12 is fixed on the outer shell 11 through the guide vane blades 13, and then the driving part 30 is fixed, compared with the traditional motor which is fixedly connected through a flange plate, the fan driving device has the advantages that the guide vane blades 13 are used as structural supports of the inner shell 12 to further support the driving part 30, the structural strength is improved, and the fan operation is more stable.

Referring to fig. 2 to 5, in some embodiments, a front end cover 121 is disposed at an end of the inner casing 12 facing the impeller 20, a rear end cover 122 is disposed at an end of the inner casing 12 facing away from the impeller 20, all of the front end cover 121, the rear end cover 122 and the inner casing 12 define a receiving cavity, and the rotor assembly 32 and the stator assembly 31 are located in the receiving cavity to protect the rotor assembly 32 and the stator assembly 31; the front end cover 121 and the inner shell 12 are integrally cast, so that the fan is compact in structure, and the output shaft 33 can rotatably penetrate through the front end cover 121; of course, in other embodiments, the front cover 121 and the inner shell 12 are detachably connected by bolts; the rear end cover 122 is detachably connected to the inner housing 12 through bolts, so that the rotor assembly 32, the stator assembly 31 and the output shaft 33 can be conveniently placed in the inner housing 12. One end of the output shaft 33, which is far away from the impeller 20, is mounted on the rear end cover 122 through the first bearing 41, and the output shaft 33 is connected with the front end cover 121 through the second bearing 42, and the output shaft 33 is supported by the front end cover 121 and the rear end cover 122.

Referring to fig. 2-4, in some embodiments, the stator winding 312 is connected to a power source through a cable, the rear end cover 122 is provided with a through hole 1221 for the cable to pass through, and the through hole 1221 is connected to a waterproof connector 14 matched with the cable, so as to improve waterproof performance; the watertight connector 14 is conventional in the art and the structure thereof will not be described in detail.

Referring to fig. 3 and 5, in some embodiments, a first diameter-expanding portion 331 is radially disposed on the output shaft 33, side plates 34 are respectively connected to two ends of the rotor core 321, and the side plates 34 and the output shaft 33 are keyed to be in rotation-stopping fit with the output shaft 33; the side plate 34 close to the impeller 20 abuts against the first diameter-expanding part 331, so that the rotor core 321 is quickly positioned, and the assembly efficiency is improved; a limiting sleeve 35 is further screwed on the output shaft 33, and the limiting sleeve 35 is abutted against the side plate 34 far away from the impeller 20, so that the position of the rotor core is limited, and the rotor core 321 is prevented from shifting; by providing the side plate 34, the rotor core 321 is prevented from directly contacting the first diameter-enlarged portion 331 and the stopper 35, and the rotor core is protected.

Referring to fig. 3, 4 and 7, in some embodiments, a stop washer 36 is further disposed between the stop collar 35 and the side plate 34 away from the impeller 20, the stop washer 36 is configured to be annular and is sleeved on the output shaft 33, the stop washer 36 has an inner stop lug 361 and at least one outer stop lug 362, the inner stop lug 361 is located at an inner ring of the stop washer 36 and can be clamped into a key slot provided on a side wall of the output shaft 33, so as to achieve rotation stop engagement of the stop washer 36 and the output shaft 33; the outer stopping lug 362 is positioned at the outer ring of the stopping washer 36, at least one limiting groove 351 for the outer stopping lug 362 to be clamped in is arranged on the outer wall of the limiting sleeve 35, and the outer stopping lug 362 is matched with the limiting groove 351 to realize the rotation stopping matching of the limiting sleeve 35 and the stopping washer 36; the stop washer 36 indirectly transfers the rotation of the stop sleeve 35 relative to the output shaft 33 to prevent the rotor core 321 from shifting relative to the output shaft 33, thereby improving the stability of the rotor.

Specifically, referring to fig. 3 to 6, a first mounting location 1222 engaged with the first bearing 41 is disposed on the rear end cover 122, the first mounting location 1222 is annular and is formed by the rear end cover 122 extending toward the impeller 20, an outer ring of the first bearing 41 is in interference fit with the first mounting location 1222, and one end of the outer ring of the first bearing 41, which is far away from the impeller 20, abuts against the rear end cover 122; the output shaft 33 is provided with a first step surface 332, the first bearing 41 is sleeved on the output shaft 33, the inner ring of the first bearing 41 is connected with the first step surface 332, and the first step surface 332 is matched with the first mounting position 1222 to fix the first bearing 41, so that the assembly is convenient and fast. The front end cover 121 is provided with a second mounting position 1211 matched with the second bearing 42, the second mounting position 1211 is of an annular structure and is formed by extending the front end cover 121 along the axial direction of the output shaft 33, the outer ring of the second bearing 42 is in interference fit with the second mounting position 1211, one end, facing the impeller 20, of the outer ring of the second bearing 42 is abutted against the front end cover 121, one end, far away from the impeller 20, of the inner ring of the second bearing 42 is abutted against the first diameter expanding part 331, and the second mounting position 1211 is matched with the first diameter expanding part 331 to fix the second bearing 42, so that the assembly is convenient and fast; a plurality of reinforcing plates 1212 are arranged on one side of the front end cover 121 facing the impeller 20, the reinforcing plates 1212 are arranged at intervals along the circumference of the front end cover 121, and one end of the reinforcing plate 1212, which is close to the axial center of the front end cover 121, is connected to the second mounting position 1211; in addition, the output shaft 33 is further provided with a clamp spring 43, and the clamp spring 43 is abutted against one end of the inner ring of the second bearing 42 facing the impeller 20 so as to improve the fixing effect of the second bearing 42.

Referring to fig. 5, in some embodiments, the second installation site 1211 is provided with a third installation site 1213 on a side facing the impeller 20, the third installation site 1213 is provided with a rotary seal 44 engaged with the output shaft 33 to isolate moisture or impurities, and the rotary seal 44 is a conventional seal structure and will not be described in detail.

Referring to fig. 1, in some embodiments, the impeller 20 includes an impeller disk 21 and impeller blades 22, the impeller disk 21 is sleeved on the output shaft 33 and is in rotation-stopping connection with the output shaft 33, and the outer diameter of the inner shell 12 is the same as that of the impeller disk 21, so as to reduce wind pressure loss; the impeller disc 21 is provided with an outer ring 211 connected with the impeller blades 22 and an inner ring 212 sleeved on the output shaft 33, and the inner ring 212 is connected with the outer ring 211 through a web 213; a plurality of ribs 214 are arranged on the web 213 at intervals along the circumferential direction of the inner ring 212, the ribs 214 are arranged as cylinders and arranged along the radial direction of the web 213, one end of each rib 214 is connected with the inner ring 212, and the other end of each rib 214 is connected with the outer ring 211, so that the structural strength of the impeller disc 21 is improved.

Referring to fig. 3 and 5, in some embodiments, a second expanded diameter portion 333 is provided on the output shaft 33, and one end of the inner ring 212 close to the rear end cover 122 abuts against the second expanded diameter portion 333 to quickly position the impeller 20; one end of the output shaft 33, which is far away from the rear end cover 122, is screwed with a spindle nose nut 51, and the spindle nose nut 51 and the second diameter expanding part 333 are matched with the impeller 20 for fixing, so that the assembly and disassembly are convenient.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.