CN213331615U

CN213331615U - Low-noise heat-resistant centrifugal fan

Info

Publication number: CN213331615U
Application number: CN202022086752.8U
Authority: CN
Inventors: 傅亚佳
Original assignee: Shaoxing Shangyu Jiake Electromechanical Equipment Co ltd
Current assignee: Shaoxing Shangyu Jiake Electromechanical Equipment Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-06-01
Anticipated expiration: 2030-09-22

Abstract

The utility model discloses a heat-resisting centrifugal fan of low noise relates to the centrifugal fan field, including the fan casing, the bottom of fan casing is provided with driving motor, driving motor's middle part cover is equipped with the mounting bracket, driving motor's top is provided with the axis of rotation, the middle part cover of axis of rotation is equipped with deep groove ball bearing, the locating hole has been seted up to the bilateral symmetry at axis of rotation top, fan casing inner chamber's middle part is provided with the driven shaft, the middle part difference fixedly connected with blade of four sides of driven shaft, the spacing groove has been seted up in the centre of driven shaft bottom, the middle part of spacing inslot chamber is provided with the rubber ring, the bilateral symmetry fixedly connected with reference column of spacing groove top. A heat-resisting centrifugal fan of low noise, form buffer structure in the bottom of driven shaft, reduce the amplitude when driven shaft bottom operates, and then reduce the noise that the blade during operation produced because of vibrations.

Description

Low-noise heat-resistant centrifugal fan

Technical Field

The utility model relates to a centrifugal fan field, in particular to heat-resisting centrifugal fan of low noise.

Background

The centrifugal fan is a machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, and is a driven fluid machine. According to the principle of converting kinetic energy into potential energy, the impeller rotating at high speed is used for accelerating gas, and then the gas is decelerated and changed in flow direction, so that the kinetic energy is converted into the potential energy. In a centrifugal fan, the gas enters the impeller from an axial direction, changes to a radial direction as it flows through the impeller, and then enters the fan housing. In the fan housing, the gas changes flow direction causing a deceleration, which converts kinetic energy into pressure energy.

During operation of the ventilator, the turning of the vanes, the swirling flow, turbulence and mechanical vibrations all produce a significant amount of noise. The noise seriously affects the surrounding environment and causes damage to the physiological and psychological health of people who produce and live near the fan for a long time.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a low-noise heat-resistant centrifugal fan, which can effectively solve the problems of the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a low-noise heat-resistant centrifugal fan comprises a fan shell, wherein a driving motor is arranged at the bottom of the fan shell, a mounting frame is sleeved at the middle part of the driving motor, a rotating shaft is arranged at the top of the driving motor, deep groove ball bearings are sleeved at the middle part of the rotating shaft, positioning holes are symmetrically formed in two sides of the top of the rotating shaft, a driven shaft is arranged in the middle of an inner cavity of the fan shell, blades are fixedly connected to the middle parts of the four sides of the driven shaft respectively, a limiting groove is formed in the center of the bottom of the driven shaft, a rubber ring is arranged in the middle of the inner cavity of the limiting groove, positioning columns are symmetrically and fixedly connected to two sides of the inner wall of the top of the limiting groove, fixing bolts are symmetrically arranged at the bottoms of the two sides of the driven shaft, a sealing bearing is sleeved at the top, the middle part of the inner cavity of the sealing rubber sleeve is provided with a rubber column, the middle part of the rubber column is sleeved with a damping spring, and one end of the sealing rubber sleeve, which is far away from the connecting column, is fixedly connected with a supporting column.

Preferably, the driving motor is closely attached to and fixedly connected with the wall body of the mounting frame, the top end of the mounting frame is fixedly connected to the outer wall of the bottom of the fan casing, an output shaft extends from the center of the top of the driving motor, and the top end of the output shaft of the driving motor is connected with the bottom end of the rotating shaft through a coupling.

Preferably, the inner cavity of the fan casing is communicated with the outside through the top and the right side of the inner cavity, the top end of the rotating shaft penetrates through the outer wall of the bottom of the fan casing and extends to the inside of the fan casing, the deep groove ball bearing is arranged between the rotating shaft and the wall body of the fan casing, and the rotating shaft is rotatably connected with the wall body of the fan casing through the deep groove ball bearing.

Preferably, the inner walls of the four sides of the joint limit groove of the rubber ring outer ring are fixedly connected, the top end of the rotating shaft penetrates through the rubber ring and extends to the inside of the limit groove, the rotating shaft is jointed with the wall body of the rubber ring inner ring, the bottom ends of the positioning columns respectively extend to the inside of the two positioning holes and fit with the inner walls of the positioning holes, one end, close to the driven shaft, of the fixing bolt sequentially penetrates through the wall body of the driven shaft, the wall body of the rubber ring and the outer wall of the rotating shaft and extends to the inside of the wall body of the rotating shaft, and the fixing bolt is connected with the wall.

Preferably, the driven shaft is closely attached to and fixedly connected with the wall body of the inner ring of the sealing bearing, and one end, far away from the sealing rubber sleeve, of the supporting column is fixedly connected to the inner wall of the side face of the fan shell.

Preferably, the two ends of the rubber column are respectively and fixedly connected to the inner walls at the two ends of the sealing rubber sleeve, and the two ends of the damping spring are respectively and fixedly connected to the inner walls at the two ends of the sealing rubber sleeve.

Compared with the prior art, the utility model discloses following beneficial effect has:

in the utility model, the rotating shaft and the driven shaft are in a splicing structure, the joint of the rotating shaft and the driven shaft is provided with a rubber ring, a buffer structure is formed at the bottom end of the driven shaft, so that the amplitude of the bottom end of the driven shaft during operation is reduced, the noise generated by vibration during the operation of the blade is further reduced, the rotating shaft drives the driven shaft to rotate smoothly through the positioning column and the positioning hole, the rotating shaft and the driven shaft are fixed stably through the arranged fixing bolt, a solid bearing foundation is provided for the work of the driven shaft, and through the matching work of the arranged sealing rubber sleeve, the rubber column and the damping spring, form the energy-absorbing region between spliced pole, support column, the rotation of cooperation sealed bearing to the driven shaft top is supported, and the amplitude when further reduction driven shaft top operation makes the work of blade have the stable support basis, avoids the blade because of producing great noise with the irregular friction of air.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view of the present invention at A in FIG. 1;

FIG. 3 is an enlarged view of the present invention at B in FIG. 1;

fig. 4 is a cross-sectional view of the sealant sleeve of the present invention.

In the figure: 1. a fan housing; 2. a drive motor; 3. a mounting frame; 4. a rotating shaft; 5. a deep groove ball bearing; 6. positioning holes; 7. a driven shaft; 8. a blade; 9. a limiting groove; 10. a rubber ring; 11. a positioning column; 12. fixing the bolt; 13. sealing the bearing; 14. connecting columns; 15. sealing the rubber sleeve; 16. glue columns; 17. a damping spring; 18. and (4) a support column.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" 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 to which the reference is made 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-4, a low-noise heat-resistant centrifugal fan comprises a fan casing 1, an inner cavity of the fan casing 1 is communicated with the outside from the top to the right side, a driving motor 2 is arranged at the bottom of the fan casing 1, a mounting frame 3 is sleeved at the middle part of the driving motor 2, a rotating shaft 4 is arranged at the top of the driving motor 2, the driving motor 2 is closely attached and fixedly connected with the wall body of the mounting frame 3, the top end of the mounting frame 3 is fixedly connected to the outer wall of the bottom of the fan casing 1, an output shaft extends from the center of the top of the driving motor 2, the top end of the output shaft of the driving motor 2 is connected with the bottom end of the rotating shaft 4 through a coupling, a deep groove ball bearing 5 is sleeved at the middle part of the rotating shaft 4, the top end of the rotating shaft 4 penetrates through the outer wall of the bottom of the fan, the rotating shaft 4 is rotatably connected with the wall body of the fan casing 1 through a deep groove ball bearing 5.

Locating holes 6 are symmetrically formed in two sides of the top of the rotating shaft 4, a driven shaft 7 is arranged in the middle of an inner cavity of the fan shell 1, blades 8 are fixedly connected to the middle of four sides of the driven shaft 7 respectively, a limiting groove 9 is formed in the center of the bottom of the driven shaft 7, a rubber ring 10 is arranged in the middle of the inner cavity of the limiting groove 9, locating columns 11 are symmetrically and fixedly connected to two sides of the inner wall of the top of the limiting groove 9, fixing bolts 12 are symmetrically arranged at the bottoms of two sides of the driven shaft 7, the outer ring of the rubber ring 10 is attached to the inner wall of the four sides of the limiting groove 9 and fixedly connected to the inner wall, the top end of the rotating shaft 4 penetrates through the rubber ring 10 and extends into the limiting groove 9, the bottom ends of the two locating columns 11 extend into the two locating holes 6 respectively and fit with the inner wall of the locating, The outer wall of the rotating shaft 4 extends to the inner part of the wall body of the rotating shaft 4, and the fixing bolt 12 is connected with the driven shaft 7 and the wall body of the rotating shaft 4 through threads.

The top cover of driven shaft 7 is equipped with sealed bearing 13, the close laminating of wall body and sealed bearing 13 inner circle of driven shaft 7 and sealed bearing 13 is fixed connection, four sides of sealed bearing 13 outer lane are fixedly connected with spliced pole 14 respectively, spliced pole 14 keeps away from sealed bearing 13's one end fixedly connected with sealed gum cover 15, the middle part of sealed gum cover 15 inner chamber is provided with gluey post 16, the both ends of gluey post 16 are fixed connection respectively on the inner wall at sealed gum cover 15 both ends, the middle part cover of gluey post 16 is equipped with damping spring 17, damping spring 17's both ends are fixed connection respectively on the inner wall at sealed gum cover 15 both ends, the one end fixedly connected with support column 18 that spliced pole 14 was kept away from to sealed gum cover 15, the one end fixed connection that sealed gum cover 15 was kept away from to support.

It should be noted that, the utility model relates to a heat-resisting centrifugal fan of low noise, when using, drive the axis of rotation 4 to rotate through driving motor 2, the axis of rotation 4 drives the driven shaft 7 to rotate, the axis of rotation 4 and the driven shaft 7 are the socket structure, the junction of axis of rotation 4 and driven shaft 7 is provided with rubber ring 10, form the buffer structure in the bottom of driven shaft 7, reduce the amplitude when the bottom of driven shaft 7 operates, and then reduce the noise that the blade 8 during operation because of vibrations produces, through the reference column 11 and the locating hole 6 that set up, make the axis of rotation 4 drive the driven shaft 7 to rotate smoothly, through the fixing bolt 12 that sets up, make the axis of rotation 4 and the fixed of driven shaft 7 firm, provide solid bearing foundation for the work of driven shaft 7, through the cooperation work of the sealed gum cover 15 that sets up, the rubber column 16, damping spring 17, form the energy absorption region between, the rotary support of the top end of the driven shaft 7 is matched with the sealing bearing 13, so that the amplitude of the top end of the driven shaft 7 during operation is further reduced, the operation of the blade 8 has a stable support foundation, and the blade 8 is prevented from generating large noise due to irregular friction with air.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a heat-resisting centrifugal fan of low noise, includes fan casing (1), its characterized in that: the fan is characterized in that a driving motor (2) is arranged at the bottom of the fan shell (1), a mounting frame (3) is sleeved at the middle part of the driving motor (2), a rotating shaft (4) is arranged at the top of the driving motor (2), a deep groove ball bearing (5) is sleeved at the middle part of the rotating shaft (4), positioning holes (6) are symmetrically formed in the two sides of the top of the rotating shaft (4), a driven shaft (7) is arranged in the middle of an inner cavity of the fan shell (1), blades (8) are fixedly connected to the middle parts of the four sides of the driven shaft (7) respectively, a limiting groove (9) is formed in the middle of the bottom of the driven shaft (7), a rubber ring (10) is arranged in the middle of the inner cavity of the limiting groove (9), positioning columns (11) are fixedly connected to the two sides of the inner wall of, the top cover of driven shaft (7) is equipped with sealed bearing (13), four sides difference fixedly connected with spliced pole (14) of sealed bearing (13) outer lane, the sealed gum cover (15) of one end fixedly connected with that sealed bearing (13) were kept away from in spliced pole (14), the middle part of sealed gum cover (15) inner chamber is provided with gluey post (16), the middle part cover of gluey post (16) is equipped with damping spring (17), the one end fixedly connected with support column (18) of spliced pole (14) are kept away from in sealed gum cover (15).

2. A low noise heat resistant centrifugal fan according to claim 1, wherein: the wall body of driving motor (2) and mounting bracket (3) is close to be laminated and fixed connection, the top fixed connection of mounting bracket (3) is on the outer wall of fan casing (1) bottom, the centre at driving motor (2) top extends there is the output shaft, and the top of driving motor (2) output shaft is connected through the shaft coupling with the bottom of axis of rotation (4).

3. A low noise heat resistant centrifugal fan according to claim 2, wherein: the inner chamber of fan casing (1) is linked together with the external world by its top, the top of axis of rotation (4) runs through the outer wall of fan casing (1) bottom and extends to the inside of fan casing (1), deep groove ball bearing (5) set up between the wall body of axis of rotation (4) and fan casing (1), and axis of rotation (4) pass through deep groove ball bearing (5) with the wall body of fan casing (1) and rotate and be connected.

4. A low noise heat resistant centrifugal fan according to claim 3, wherein: the inner walls of four sides of a gluing limiting groove (9) of the outer ring of the rubber ring (10) are fixedly connected, the top end of the rotating shaft (4) penetrates through the rubber ring (10) and extends to the inside of the limiting groove (9), the wall body of the inner ring of the rubber ring (10) is glued to the rotating shaft (4), the bottom ends of the positioning columns (11) extend to the inside of the two positioning holes (6) and fit with the inner walls of the positioning holes (6) respectively, one end, close to the driven shaft (7), of the fixing bolt (12) penetrates through the wall body of the driven shaft (7), the wall body of the rubber ring (10), the outer wall of the rotating shaft (4) in sequence and extends to the inside of the wall body of the rotating shaft (4), and the fixing bolt (12) is connected with the wall body of the driven shaft (.

5. A low noise heat resistant centrifugal fan according to claim 4 wherein: the driven shaft (7) is closely attached to and fixedly connected with the wall body of the inner ring of the sealing bearing (13), and one end, far away from the sealing rubber sleeve (15), of the supporting column (18) is fixedly connected to the inner wall of the side face of the fan shell (1).

6. A low noise heat resistant centrifugal fan according to claim 5, wherein: the two ends of the rubber column (16) are respectively and fixedly connected to the inner walls of the two ends of the sealing rubber sleeve (15), and the two ends of the damping spring (17) are respectively and fixedly connected to the inner walls of the two ends of the sealing rubber sleeve (15).