CN216407211U

CN216407211U - Hollow shaft centrifugal fan

Info

Publication number: CN216407211U
Application number: CN202123299174.7U
Authority: CN
Inventors: 王琳东
Original assignee: Zibo Golden River Fans Co ltd
Current assignee: Zibo Golden River Fans Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-04-29
Anticipated expiration: 2031-12-24

Abstract

The utility model provides a hollow shaft centrifugal fan, which belongs to the technical field of fan equipment and comprises a base, wherein a fan shell and a motor are fixedly arranged on the base, an air inlet is formed in one side of the fan shell, and an air outlet is formed in the upper end of the fan shell; a blade and a blade shaft are arranged in the fan shell cavity, and the blade is fixedly connected with the blade shaft; a rotor shaft is arranged in the motor, and the blade shaft is fixedly connected with the rotor shaft. According to the device, the motor rotor shaft and the blade shaft are both hollow shafts, so that the device is convenient to mount and dismount, the hollow shafts are convenient to process, and the processing difficulty and the processing cost of the hollow shafts are greatly reduced. The rotating shaft of the centrifugal fan in the device adopts a hollow shaft, so that the weight of the rotating shaft of the centrifugal fan is reduced, the mechanical energy conversion efficiency is improved, and the energy consumption is saved.

Description

Hollow shaft centrifugal fan

Technical Field

The utility model belongs to the technical field of fan equipment, and particularly relates to a hollow shaft centrifugal fan.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. At present, the fan is a general machine widely applied to various industries of national economy. Fans are classified into centrifugal fans and axial flow fans. The centrifugal fan has the advantages of good ventilation and air exchange effects, strong adaptability, low noise during operation and the like, thereby being widely applied.

At present, most of rotating shafts of existing centrifugal fans are solid shafts, and along with the fact that the capacity of a fan unit, the model selection parameters of the fan and the diameter of an impeller of the selected fan are larger and larger, the weight of a fan rotor is heavier along with the change of the capacity of the fan unit, the fan rotor is difficult to start, the mechanical energy conversion efficiency is low, and the like, the centrifugal fan with the hollow shaft type is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: overcomes the defects in the prior art and provides a hollow shaft centrifugal fan.

In order to solve the problems, the utility model adopts the technical scheme that:

a hollow shaft centrifugal ventilator comprises a base, wherein a fan shell and a motor are fixedly arranged on the base, an air inlet is formed in one side of the fan shell, and an air outlet is formed in the upper end of the fan shell; a blade and a blade shaft are arranged in the fan shell cavity, and the blade is fixedly connected with the blade shaft; a rotor shaft is arranged in the motor, and the blade shaft is fixedly connected with the rotor shaft.

Specifically, the blade shaft is a hollow shaft, and the blade shaft is fixedly connected with the rotor shaft.

Specifically, the rotor shaft is a hollow shaft, and the rotor shaft is fixedly connected with the blade shaft.

Specifically, the fixed first pillow block that is equipped with of blade pedestal portion, blade pedestal portion cover is equipped with first nut cover, first nut ways is established in the inboard of first pillow block, the rotor shaft tip is provided with first external screw thread, first external screw thread is connected with the cooperation of first nut cover.

Specifically, the spiral direction of the first external thread is opposite to the rotation direction of the blade shaft.

Specifically, the end portion of the rotor shaft is fixedly provided with a second shaft table, the end portion of the rotor shaft is provided with a second nut sleeve, the second nut sleeve is sleeved on the inner side of the rotor shaft, the end portion of the blade shaft is provided with a second external thread, and the second external thread is connected with the second nut sleeve in a matched mode.

Specifically, the helical direction of the second external thread is opposite to the rotational direction of the rotor shaft.

Specifically, the external diameter of blade axle is less than the internal diameter of rotor shaft, the blade axle with the rotor shaft cup joints the cooperation and is connected, blade axle tip both sides respectively are equipped with first keyway the rotor shaft is last to be equipped with the second keyway with first keyway department of corresponding, be equipped with first spline between first keyway and the second keyway.

Specifically, the outer diameter of the rotor shaft is smaller than the inner diameter of the blade shaft, the rotor shaft is connected with the blade shaft in a sleeved fit mode, third key grooves are formed in two sides of the end portion of the rotor shaft respectively, fourth key grooves are formed in the positions, corresponding to the third key grooves, of the blade shaft, and second splines are arranged between the third key grooves and the fourth key grooves.

Specifically, the outer side of the air inlet is provided with a dust screen.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model provides a hollow shaft centrifugal fan, wherein a motor rotor shaft and a blade shaft in the device are both hollow shafts, and the motor rotor shaft and the blade shaft are in threaded connection, so that the device is convenient to mount and dismount, the hollow shafts are convenient to process, and the processing difficulty and the processing cost of the hollow shafts are greatly reduced.

2. The utility model provides a hollow shaft centrifugal fan, wherein a rotating shaft of the centrifugal fan in the device adopts a hollow shaft, so that the weight of the rotating shaft of the centrifugal fan is reduced, the mechanical energy conversion efficiency is improved, and the energy consumption is saved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a partial enlarged view of the first embodiment A;

FIG. 4 is a schematic axial cross-sectional view of a vane shaft according to an embodiment;

FIG. 5 is a partially enlarged view of the second embodiment A;

FIG. 6 is an axial cross-sectional structural view of an example vane shaft.

In the figure: 1. the fan comprises a base, 2, a fan shell, 3, a motor, 4, an air inlet, 5, an air outlet, 6, a blade, 7, a blade shaft, 8, a rotor shaft, 9, a first shaft platform, 10, a first nut sleeve, 11, a first external thread, 13, a second shaft platform, 14, a second nut sleeve, 15, a second external thread, 16, a first key groove, 17, a second key groove, 18, a first spline, 19, a third key groove, 20, a fourth key groove, 21, a second spline, 22 and a dustproof net.

Detailed Description

The present invention is further described in detail with reference to the accompanying drawings, the following embodiments are merely for better clarity of the technical solutions of the present invention, and variations made by those skilled in the art on the basis of the embodiments of the present invention are within the protective scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.

Example 1

As shown in fig. 1 to 6, the utility model provides a hollow shaft centrifugal fan, which comprises a base 1, wherein a fan shell 2 and a motor 3 are fixedly arranged on the base 1, an air inlet 4 is arranged at one side of the fan shell 2, and an air outlet 5 is arranged at the upper end of the fan shell 2; a blade 6 and a blade shaft 7 are arranged in the cavity of the fan shell 2, and the blade 6 is fixedly connected with the blade shaft 7; and a rotor shaft 8 is arranged in the motor 3, and the blade shaft 7 is fixedly connected with the rotor shaft 8.

Specifically, the vane shaft 7 is a hollow shaft, and the vane shaft 7 is fixedly connected with the rotor shaft 8. The blade shaft 7 in the embodiment of the utility model is processed into a hollow shaft, so that the weight of the rotating part of the fan can be reduced, the mechanical energy conversion efficiency is improved, and the energy consumption is saved.

Specifically, as shown in fig. 3 and 4, a first boss 9 is fixedly arranged at an end portion of the blade shaft 7, a first nut sleeve 10 is sleeved at the end portion of the blade shaft 7, the first nut sleeve 10 is sleeved on the inner side of the first boss 9, a first external thread 11 is arranged at an end portion of the rotor shaft 8, and the first external thread 11 is connected with the first nut sleeve 10 in a matching manner. In the embodiment of the utility model, the rotor shaft 8 is provided with the first external thread 11, the first external thread 11 is matched and connected with the first nut sleeve 10, and the blade shaft 7 and the rotor shaft 8 are fixedly connected together by the nut sleeve 10.

Specifically, the direction of the screw of the first external thread 11 is opposite to the rotation direction of the vane shaft 7. In the embodiment of the utility model, the spiral direction of the first external thread 11 is opposite to the rotating direction of the blade shaft 7, and when the fan is applied, the threaded connection between the first nut sleeve 10 and the rotor shaft 8 is tighter and tighter, so that the first nut sleeve is not easy to loosen.

Specifically, as shown in fig. 3 and 4, the outer diameter of the vane shaft 7 is smaller than the inner diameter of the rotor shaft 8, the vane shaft 7 is connected with the rotor shaft 8 in a sleeved fit manner, first key grooves 16 are respectively arranged on two sides of the end portion of the vane shaft 7, second key grooves 17 are arranged on the rotor shaft 8 corresponding to the first key grooves 16, and first splines 18 are arranged between the first key grooves 16 and the second key grooves 17. In the embodiment of the utility model, the rotor shaft 8 and the blade shaft 7 are connected by the first spline 18, so that the rotation strength of the rotor shaft 8 to the blade shaft 7 is increased. In the assembly of the embodiment of the utility model, the first spline is arranged between the first key groove 16 and the second key groove 17, then the blade shaft 7 is inserted into the rotor shaft 8, and the blade shaft 7 and the rotor shaft 8 are fixedly connected together through the first nut sleeve 10.

Specifically, the outer side of the air inlet 4 is provided with a dust screen 22.

Example 2

Specifically, the rotor shaft 8 is a hollow shaft, and the rotor shaft 8 is fixedly connected with the blade shaft 7. In the embodiment of the utility model, the rotor shaft 8 is processed into a hollow shaft, so that the weight of the rotating part of the fan can be reduced, the mechanical energy conversion efficiency is improved, and the energy consumption is saved.

Specifically, as shown in fig. 5 and 6, a second shaft table 13 is fixedly arranged at an end portion of the rotor shaft 8, a second nut sleeve 14 is arranged at the end portion of the rotor shaft 8, the second nut sleeve 14 is sleeved on the inner side of the rotor shaft 8, a second external thread 15 is arranged at an end portion of the blade shaft 7, and the second external thread 15 is in fit connection with the second nut sleeve 14.

In particular, the helical direction of said second external thread 15 is opposite to the direction of rotation of the rotor shaft 8. In the embodiment of the utility model, the spiral direction of the second external thread 15 is opposite to the rotating direction of the rotor shaft 8, and when the fan is applied, the threaded connection between the second nut sleeve 14 and the blade shaft 7 is tighter and tighter, so that the second nut sleeve is not easy to loosen.

Specifically, as shown in fig. 5 and 6, the outer diameter of the rotor shaft 8 is smaller than the inner diameter of the blade shaft 7, the rotor shaft 8 is connected with the blade shaft 7 in a sleeved and matched manner, third keyways 19 are respectively arranged on two sides of the end portion of the rotor shaft 8, a fourth keyway 20 is arranged on the blade shaft 7 corresponding to the third keyway 19, and a second spline 21 is arranged between the third keyway 19 and the fourth keyway 20. In the embodiment of the utility model, the rotor shaft 8 and the blade shaft 7 are connected by the second spline 21, so that the transmission strength of the rotor shaft 8 to the blade shaft 7 is increased. In the assembly of the embodiment of the utility model, the second spline 21 is arranged between the third spline 19 and the fourth spline 20, then the rotor shaft 8 is inserted into the blade shaft 7, and the blade shaft 7 and the rotor shaft 8 are fixedly connected together through the second nut sleeve 40.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. Hollow shaft centrifugal fan, including base (1), its characterized in that:

a fan shell (2) and a motor (3) are fixedly arranged on the base (1), an air inlet (4) is formed in one side of the fan shell (2), and an air outlet (5) is formed in the upper end of the fan shell (2);

a blade (6) and a blade shaft (7) are arranged in the cavity of the fan shell (2), and the blade (6) is fixedly connected with the blade shaft (7); a rotor shaft (8) is arranged in the motor (3), and the blade shaft (7) is fixedly connected with the rotor shaft (8).

2. The hollow shaft centrifugal fan of claim 1, wherein:

the blade shaft (7) is a hollow shaft, and the blade shaft (7) is fixedly connected with the rotor shaft (8).

3. The hollow shaft centrifugal fan of claim 1, wherein:

the rotor shaft (8) is a hollow shaft, and the rotor shaft (8) is fixedly connected with the blade shaft (7).

4. The hollow shaft centrifugal fan of claim 2, wherein:

blade axle (7) end fixing is equipped with first pillow block (9), blade axle (7) tip cover is equipped with first nut cover (10), the inboard at first pillow block (9) is established to first nut cover (10) cover, rotor shaft (8) tip is provided with first external screw thread (11), first external screw thread (11) are connected with first nut cover (10) cooperation.

5. The hollow shaft centrifugal fan of claim 4, wherein:

the spiral direction of the first external thread (11) is opposite to the rotation direction of the blade shaft (7).

6. A hollow shaft centrifugal fan according to claim 3, wherein:

rotor shaft (8) end fixing is equipped with second axle platform (13), rotor shaft (8) end is equipped with second nut cover (14), the inboard at rotor shaft (8) is established in second nut cover (14) cover, blade axle (7) tip is provided with second external screw thread (15), second external screw thread (15) and second nut cover (14) cooperation are connected.

7. The hollow shaft centrifugal fan of claim 6, wherein:

the direction of the thread of the second external thread (15) is opposite to the direction of rotation of the rotor shaft (8).

8. The hollow shaft centrifugal fan of claim 4, wherein:

the external diameter of blade axle (7) is less than the internal diameter of rotor shaft (8), blade axle (7) with rotor shaft (8) cup joint the cooperation and connect, blade axle (7) tip both sides respectively are equipped with first keyway (16) rotor shaft (8) go up and correspond the department with first keyway (16) and be equipped with second keyway (17), be equipped with first spline (18) between first keyway (16) and second keyway (17).

9. The hollow shaft centrifugal fan of claim 6, wherein:

the external diameter of rotor shaft (8) is less than the internal diameter of blade axle (7), rotor shaft (8) with blade axle (7) cup joints the cooperation and connects, rotor shaft (8) tip both sides respectively are equipped with third keyway (19) correspond the department with third keyway (19) on blade axle (7) and are equipped with fourth keyway (20), be equipped with second spline (21) between third keyway (19) and fourth keyway (20).

10. The hollow shaft centrifugal fan of claim 1, wherein:

and a dust screen (22) is arranged on the outer side of the air inlet (4).