CN209925237U - High-speed centrifugal blower - Google Patents

Abstract

The utility model provides a high-speed centrifugal blower, wherein an impeller is arranged inside a shell and is arranged on a rotating shaft; the air inlet flange is arranged on the side surface of the shell and is connected with the shell; the air outlet flange is arranged on the side surface of the shell and connected with the shell, the synchronizing wheel is arranged on the outer side of the shell and sleeved on the rotating shaft, the synchronizing wheel is provided with a bolt groove, the rotating shaft is provided with a bolt structure, and the bolt structure is embedded into the bolt groove; the first synchronous wheel block is provided with a first limiting block, the second synchronous wheel block is provided with a second limiting block, and when the synchronous belt is installed on the synchronous wheel, the first limiting block and the second limiting block are respectively located on two sides of the synchronous belt. Through the scheme, the synchronous belt is fixed by the two combined limiting blocks on the synchronous wheel, when the synchronous belt drives the synchronous wheel to rotate, the synchronous belt limits axial movement on the synchronous wheel, falling cannot occur, and the use requirement of a high-speed centrifugal air blower is met. Meanwhile, the combined limiting block is extremely convenient to replace the synchronous belt.

Description

High-speed centrifugal blower

Technical Field

The utility model relates to a centrifugal blower field especially relates to a high-speed centrifugal blower.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.

Traditional centrifugal blower has multiple working methods according to the connected mode with the motor, and the centrifugal blower who adopts the mode that synchronizing wheel and hold-in range are connected wherein just can make the impeller obtain the effect that is higher than motor speed, and based on high rotational speed motor is expensive, and the maintenance cost is also high, consequently adopts ordinary low-speed motor to connect hold-in range and hold-in range to drive the centrifugal blower of impeller and uses extensively, but the blast effect of formation is not good, and the wind speed is lower, is difficult to satisfy the user demand. Meanwhile, in the use process of the common synchronous wheel, the problem that the synchronous belt is broken or falls off due to reasons such as motor acceleration, motor vibration and the like is solved, and meanwhile, the synchronous belt needs to be tensioned by adjusting the distance between the motor and the rotating shaft after being installed, so that the synchronous belt is extremely troublesome to install again. Therefore, the installation and fixation of the timing belt is a big reason for preventing the centrifugal blower from forming high-speed air flow.

This working method's centrifugal blower, improve the functioning speed and firstly adopt motor slew velocity, secondly adopt the higher synchronizing wheel of proportion, but at the operation, traditional air-blower is in the vibration of rotation in-process, the air current transports unsmooth and has leaded to singly improving the rotational speed of axis of rotation and be difficult to improve high performance price ratio acceleration.

In view of the above, a high-speed centrifugal blower is proposed to solve the above problems.

Disclosure of Invention

An object of the utility model is to provide a high-speed centrifugal blower provides the basis of high-speed operation air-blower through the synchronizing wheel of design combination formula, and the conveying and the operating stability of rethread optimization air current to realize that centrifugal blower carries out fast-speed blast air output.

The utility model discloses a technique be:

a high-speed centrifugal blower comprises a shell, a rotating shaft and an impeller, wherein the impeller is arranged in the shell and is arranged on the rotating shaft; the air inlet flange is arranged on the side surface of the shell and connected with the shell; the air outlet flange is arranged on the side surface of the shell and connected with the shell, the air outlet flange also comprises a synchronizing wheel, the synchronizing wheel is arranged on the outer side of the shell and sleeved on the rotating shaft, the synchronizing wheel is provided with a bolt groove, the rotating shaft is provided with a bolt structure, and the bolt structure is embedded into the bolt groove; the synchronizing wheel comprises a first synchronizing wheel block and a second synchronizing wheel block, the first synchronizing wheel block is provided with a first limiting block, the second synchronizing wheel block is provided with a second limiting block, and when the synchronous belt is installed on the synchronizing wheel, the first limiting block and the second limiting block are respectively positioned on two sides of the synchronous belt.

Through the scheme, the synchronous belt is fixed by the two combined limiting blocks on the synchronous wheel, when the synchronous belt drives the synchronous wheel to rotate, the synchronous belt limits axial movement on the synchronous wheel, falling cannot occur, and the use requirement of a high-speed centrifugal air blower is met. The stopper of combination formula is extremely convenient when changing the hold-in range simultaneously, only needs to dismantle the second stopper and can provide the hold-in range mounted position. The bolt structure is adopted to transmit the force of the synchronizing wheel and the rotating shaft, and the disassembly is flexible.

As a further optimization of the scheme, the impeller comprises a first impeller and a second impeller, the first impeller comprises a first air inlet and a first air outlet, the second impeller comprises a second air inlet and a second air outlet, and the air inlet flange, the first air inlet, the first air outlet, the second air inlet, the second air outlet and the air outlet flange are sequentially communicated. The relay type two-stage impeller is adopted for air transmission, so that blast output at high wind speed is effectively generated, and the use requirement of a high-speed centrifugal blower is met.

According to the scheme, the first impeller and the second impeller are arranged back to back, a first sealing part is arranged between the first impeller and the second impeller, and the first air outlet and the second air outlet are separated by the first sealing part. The two impellers arranged back to back generate axial force to the shaft to offset each other when the impellers rotate, so that an impeller combination without the axial force is formed, the air blower runs stably, and the air blowing effect is improved by effectively increasing the rotating speed. The first sealing part is adopted to separate the air outlets of the two impellers, so that the series flow and mutual interference of air flows are prevented.

As a further optimization of the scheme, the air conditioner further comprises a second sealing part, the second sealing part separates the outside of the first air inlet from the outside of the first air outlet, and the second sealing part separates the outside of the second air inlet from the outside of the second air outlet. The second sealing member blocks the outer periphery of the impeller to prevent backflow.

As further optimization of the scheme, the wind power generation device further comprises a rectifying component, wherein the rectifying component is arranged on the rotating shaft and close to one end of the wind inlet flange, the rectifying component is in a conical structure, the central line of the cone is overlapped with the rotating shaft, and the conical top is opposite to the wind inlet flange; the vertex angle of the cone is 60-90 degrees; the rectifying component extends into the air inlet flange. The rectification awl can become the air current of the vortex formula that gets into the air inlet flange into straight air current, prevents that the air current from blockking up in air inlet flange department, effectively improves the air inlet effect.

According to the scheme, the rotating shaft is provided with a first mounting hole, the synchronizing wheel is provided with a second mounting hole, and after the bolt structure is completely embedded into the bolt groove, the center line of the first mounting hole is overlapped with the center line of the second mounting hole. Adopt two mounting holes to carry out the second grade and fix, guarantee that the synchronizing wheel can not take place axial motion when rotating, further improve fixed effect.

According to the scheme, the first synchronizing wheel block is provided with a third mounting hole, the second synchronizing wheel block is provided with a fourth mounting hole, when the second synchronizing wheel block is sleeved on the first synchronizing wheel block, the central line of the third mounting hole coincides with the central line of the fourth mounting hole, and the third mounting hole and the fourth mounting hole form a second mounting hole. The third mounting hole and the fourth mounting hole are used for fixing the whole synchronizing wheel, and the first synchronizing wheel block and the second synchronizing wheel block are relatively fixed.

As the further optimization of the scheme, the ratio of the diameter of the impeller to the diameter of the shell is 2/3 +/-10%, the air inlet flange is in a round-table cavity structure, and the ratio of the diameter of the small bottom surface to the diameter of the shell is 1/3 +/-10%. Through the size of control impeller, guarantee to have sufficient air flow cavity in the casing, prevent to advance the problem that can not go out and take place, air inlet flange control intake simultaneously, conical air inlet flange can form acceleration rate effect.

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

through the scheme, the synchronous belt is fixed by the two combined limiting blocks on the synchronous wheel, when the synchronous belt drives the synchronous wheel to rotate, the synchronous belt limits axial movement on the synchronous wheel, falling cannot occur, and the use requirement of a high-speed centrifugal air blower is met. The stopper of combination formula is extremely convenient when changing the hold-in range simultaneously, only needs to dismantle the second stopper and can provide the hold-in range mounted position. The bolt structure is adopted to transmit the force of the synchronizing wheel and the rotating shaft, and the disassembly is flexible.

The two impellers arranged back to back generate axial force to the shaft to offset each other when the impellers rotate, so that an impeller combination without the axial force is formed, the air blower runs stably, and the air blowing effect is improved by effectively increasing the rotating speed.

The rectification awl can become the air current of the vortex formula that gets into the air inlet flange into straight air current, prevents that the air current from blockking up in air inlet flange department, effectively improves the air inlet effect.

The third mounting hole and the fourth mounting hole are used for fixing the whole synchronizing wheel, and the first synchronizing wheel block and the second synchronizing wheel block are relatively fixed.

Drawings

Fig. 1 is one of schematic structural diagrams of a high-speed centrifugal blower according to the present invention;

fig. 2 is one of the schematic structural diagrams of a synchronizing wheel of a high-speed centrifugal blower according to the present invention;

fig. 3 is a second schematic structural diagram of a synchronizing wheel of a high-speed centrifugal blower according to the present invention.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; 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 creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

Example 1:

referring to fig. 1 to 3, a high-speed centrifugal blower includes a casing 1, a rotary shaft 2, and an impeller installed on the rotary shaft 2, the impeller being disposed inside the casing 1; the air conditioner also comprises an air inlet flange 11 and an air outlet flange 12, wherein the air inlet flange 11 is arranged on the side surface of the shell 1 and is connected with the shell 1; the air outlet flange 12 is arranged on the side surface of the shell 1 and connected with the shell 1, the synchronous wheel 6 is arranged on the outer side of the shell 1 and sleeved on the rotating shaft 2, the synchronous wheel 6 is provided with a bolt groove 61, the rotating shaft 2 is provided with a bolt structure 21, and the bolt structure 21 is embedded into the bolt groove 61; the synchronizing wheel 6 comprises a first synchronizing wheel block 64 and a second synchronizing wheel block 65, the first synchronizing wheel block 64 is provided with a first limiting block 641, the second synchronizing wheel block 65 is provided with a second limiting block 651, and when the synchronous belt is installed on the synchronizing wheel 6, the first limiting block 641 and the second limiting block 651 are respectively located on two sides of the synchronous belt.

Traditional centrifugal blower has multiple working methods according to the connected mode with the motor, and the centrifugal blower who adopts the mode that synchronizing wheel 6 and hold-in range are connected wherein just can make the impeller obtain the effect that is higher than motor speed, and based on high rotational speed motor is expensive, and the maintenance cost is also high, consequently adopts ordinary low-speed motor to connect hold-in range and hold-in range to drive the centrifugal blower of impeller and uses extensively, but the blast effect of formation is not good, and the wind speed is lower, is difficult to satisfy the user demand. Meanwhile, in the use process of the common synchronous wheel 6, the problem that the synchronous belt is broken or falls off due to reasons such as motor acceleration, motor vibration and the like is caused to the synchronous belt, and meanwhile, the synchronous belt needs to be tensioned by adjusting the distance between the motor and the rotating shaft 2 after being installed, so that the installation of the synchronous belt again is extremely troublesome. Therefore, the installation and fixation of the timing belt is a big reason for preventing the centrifugal blower from forming high-speed air flow. Therefore, in the embodiment, the synchronous belt is prevented from falling off and is easy to install by providing the synchronous wheel 6.

In this embodiment, through designing synchronizing wheel 6 as the two half structures of combination formula, install on axis of rotation 2 through utilizing bolt structure 21 first synchronizing wheel piece 64 earlier when installing, overlap the hold-in range cover on first synchronizing wheel piece 64 back, the tensioning of hold-in range is adjusted to the distance of adjustment motor and axis of rotation 2, install second synchronizing wheel piece 65 on first synchronizing wheel piece 64 again, form and utilize first stopper 641 and second stopper 651 to the spacing of hold-in range, prevent breaking away from of hold-in range in the use. That is to say, solved high rotational speed and broken away from the problem, change the hold-in range simultaneously, dismantle down behind the second synchronizing wheel piece 65, directly just can have the space to install the hold-in range, need not adjust the motor and the distance of axis of rotation 2 unlike traditional spacing synchronizing wheel 6 in area, greatly improve change efficiency.

As a further optimization of the scheme, the rotating shaft 2 is provided with a first mounting hole 22, the synchronizing wheel 6 is provided with a second mounting hole 62, and after the bolt structure 21 is completely embedded into the bolt groove 61, the center line of the first mounting hole 22 coincides with the center line of the second mounting hole 62. Adopt two mounting holes to carry out the second grade and fix, guarantee that synchronizing wheel 6 can not take place axial motion when the pivoted, further improve fixed effect. Bolt structure 21 and bolt recess 61 are the transmission structure of power, and first mounting hole 22 and second mounting hole 62 are the structure of restriction axial motion, and synchronizing wheel 6 is rotating the in-process because the hold-in range probably leads to the production of axial force for the installation of aligning, and normal rotation in-process axial force is little, adopts two mounting holes can satisfy the requirement completely, installation and dismantlement and convenience.

As a further optimization of the scheme, the first synchronizing wheel block 64 is provided with a third mounting hole 642, the second synchronizing wheel block 65 is provided with a fourth mounting hole 652, when the second synchronizing wheel block 65 is sleeved on the first synchronizing wheel block 64, the central line of the third mounting hole 642 is overlapped with the central line of the fourth mounting hole 652, and the third mounting hole 642 and the fourth mounting hole 652 form a second mounting hole 62. The two combined synchronizing wheel 6 blocks are used for fixing the whole synchronizing wheel 6 by using the third mounting hole 642 and the fourth mounting hole 652, and on the other hand, the first synchronizing wheel block 65 and the second synchronizing wheel block 65 are relatively fixed, so that the installation is convenient.

Through the scheme, the synchronous belt is fixed by the two combined limiting blocks on the synchronous wheel 6, when the synchronous belt drives the synchronous wheel 6 to rotate, the synchronous belt limits axial movement on the synchronous wheel 6, the synchronous belt cannot fall off, and the use requirement of a high-speed centrifugal air blower is met. The stopper of combination formula is extremely convenient when changing the hold-in range simultaneously, only needs to dismantle second stopper 651 and can provide the hold-in range mounted position. The bolt structure 21 is adopted to transmit the force between the synchronizing wheel 6 and the rotating shaft 2, and the disassembly is flexible.

Example 2:

referring to fig. 1-3, the difference between this embodiment and embodiment 1 is that embodiment 1 realizes the effect of forming high-speed air blowing by increasing the rotation speed of the motor through designing on the synchronous wheel 6, and this embodiment improves the airflow rate of air blowing by increasing the airflow centrifugal effect through designing on the impeller, and at the same time, provides a two-stage impeller without axial force, and realizes more stable rotation.

In this embodiment, the impeller includes a first impeller 31 and a second impeller 32, the first impeller 31 includes a first air inlet and a first air outlet, the second impeller 32 includes a second air inlet and a second air outlet, and the air inlet flange 11, the first air inlet, the first air outlet, the second air inlet, the second air outlet and the air outlet flange 12 are sequentially communicated. The relay type two-stage impeller is adopted for air transmission, so that blast output at high wind speed is effectively generated, and the use requirement of a high-speed centrifugal blower is met. The two-stage impeller is divided into two forms of simultaneous air blowing and relay air blowing, and based on the centrifugal air blower with axial air inlet provided in the embodiment, the simultaneous air blowing has large resistance and high cost. In this embodiment, the air inlet flange 11 is disposed at one end of the rotating shaft 2, and the airflow is transmitted from the first impeller 31 to the second impeller 32 and then to the air outlet flange 12, so as to form relay two-stage blowing. On one hand, axial air intake is adopted, and on the other hand, relay type air transmission is adopted to improve the flow speed of air flow.

As a further optimization of the scheme, the first impeller 31 and the second impeller 32 are arranged back to back, a first sealing member 33 is arranged between the first impeller 31 and the second impeller 32, and the first sealing member 33 separates the first air outlet from the second air outlet. The two impellers arranged back to back generate axial force to the shaft to offset each other when the impellers rotate, so that an impeller combination without the axial force is formed, the air blower runs stably, and the air blowing effect is improved by effectively increasing the rotating speed. The first sealing part 33 is used to separate the air outlets of the two impellers, so as to prevent the air flow from streaming and interfering with each other. In the traditional relay type two-stage impeller, two impellers are designed in the same swing direction, a larger axial force exists in the rotation process, and the bearing part and the sealing part are subjected to larger pressure in the use process, so that the problems of obvious vibration and poor sealing performance are caused. In this embodiment, two impellers are back-to-back design, and the axial force that two impellers that adopt same specification produced at the rotation in-process offsets each other, guarantees to rotate the in-process more stable, provides the basis for the motor acceleration rate, prevents that the motor acceleration rate from leading to the too big problem that appears of axial force.

Furthermore, a first sealing part 33 is arranged between the two impellers to form an independent working area for the two impellers, so that the cross flow and the mutual interference of the airflow can be prevented, the impeller vibration can be caused by the interference and the cross flow of the airflow, the vibration is large in the operation process, the noise is large, and the stable operation is one of the bases for increasing the speed of the motor.

As a further optimization of the scheme, the air conditioner further comprises a second sealing part 34, the second sealing part 34 separates the outside of the first air inlet from the outside of the first air outlet, and the second sealing part 34 separates the outside of the second air inlet from the outside of the second air outlet. The second sealing member blocks the outer periphery of the impeller to prevent backflow. Similarly, the air inlet of the impeller needs to be sealed, so that the problems of series flow and interference among the single impellers are prevented.

Example 3:

referring to fig. 1-3, a difference between this embodiment and embodiment 2 is that embodiment 2 mainly ensures high-speed operation of the centrifugal blower by improving stability of an operation process, and in this embodiment, air intake efficiency is ensured by optimizing air intake to improve air blowing speed of the blower centrifuge.

In this embodiment, the wind power generation device further comprises a rectifying component 4, wherein the rectifying component 4 is arranged on the rotating shaft 2 and close to one end of the wind inlet flange 11, the rectifying component 4 is in a conical structure, the central line of the cone is overlapped with the rotating shaft 2, and the top of the cone is opposite to the wind inlet flange 11; the vertex angle of the cone is 60-90 degrees; the rectifying part 4 extends into the air inlet flange 11. The rectification awl can become the air current of the vortex formula that gets into air inlet flange 11 into straight air current, prevents that the air current from blockking up in air inlet flange 11 department, effectively improves the air inlet effect.

In the conical air inlet flange 11, due to the effect of earth rotation, vortex air flow can be formed, the axial flow velocity of the vortex air flow is low, multiple times of friction is performed on the vortex air flow and the first air inlet of the air inlet flange 11 and the first impeller 31, and the air inlet speed is reduced. In this embodiment, to the design of axial air inlet, set up fairing part 4 in axis of rotation 2 one end, the formation breaks up the vortex air current and converts the straight line air current into, guarantees that air inlet efficiency can not reduce.

As the further optimization of the scheme, the ratio of the diameter of the impeller to the diameter of the shell 1 is 2/3 +/-10%, the air inlet flange 11 is in a round-table cavity structure, and the ratio of the diameter of the small bottom surface to the diameter of the shell 1 is 1/3 +/-10%. By controlling the size of the impeller, the shell 1 is ensured to have enough air flowing cavities, the problem that the air can not only enter the shell is prevented, meanwhile, the air inlet flange 11 controls the air inlet amount, and the conical air inlet flange 11 can form a speed increasing effect. The impeller and the shell 1 meet the 2/3 principle as far as possible, the space matching of air inlet and air outlet is guaranteed, the air inlet flange 11 is of a circular truncated cone-shaped speed increasing structure, the air inlet flux determined by the air outlet of the air inlet flange 11 is based on the relationship between the impeller and the shell 1, the air outlet of the impeller cannot be discharged timely due to an overlarge air inlet, the blowing efficiency cannot be improved along with the increase of the air inlet amount, and the blowing efficiency is reduced due to the fact that air flow at the air outlet of the impeller is blocked.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. A high-speed centrifugal blower comprises a shell (1), a rotating shaft (2) and an impeller, wherein the impeller is arranged in the shell (1), and is arranged on the rotating shaft (2); the air conditioner is characterized by further comprising an air inlet flange (11) and an air outlet flange (12), wherein the air inlet flange (11) is arranged on the side face of the shell (1) and connected with the shell (1); the air outlet flange (12) is arranged on the side surface of the shell (1) and connected with the shell (1), and is characterized in that,

the synchronous wheel (6) is arranged on the outer side of the shell (1) and sleeved on the rotating shaft (2), a bolt groove (61) is formed in the synchronous wheel (6), a bolt structure (21) is arranged on the rotating shaft (2), and the bolt structure (21) is embedded into the bolt groove (61);

synchronizing wheel (6) include first synchronizing wheel piece (64) and second synchronizing wheel piece (65), first synchronizing wheel piece (64) is equipped with first stopper (641), second synchronizing wheel piece (65) are equipped with second stopper (651), and the hold-in range is installed when synchronizing wheel (6) are gone up, first stopper (641) are located respectively with second stopper (651) the both sides of hold-in range.

2. The high-speed centrifugal blower according to claim 1, wherein the impeller comprises a first impeller (31) and a second impeller (32), the first impeller (31) comprises a first air inlet and a first air outlet, the second impeller (32) comprises a second air inlet and a second air outlet, and the air inlet flange (11), the first air inlet, the first air outlet, the second air inlet, the second air outlet and the air outlet flange (12) are sequentially communicated.

3. The high-speed centrifugal blower according to claim 2, wherein the first impeller (31) and the second impeller (32) are arranged back to back, a first sealing member (33) is arranged between the first impeller (31) and the second impeller (32), and the first sealing member (33) separates the first air outlet from the second air outlet.

4. A high-speed centrifugal blower according to claim 3 further comprising a second sealing member (34), the second sealing member (34) sealing off the exterior of the first inlet from the exterior of the first outlet, the second sealing member (34) sealing off the exterior of the second inlet from the exterior of the second outlet.

5. The high-speed centrifugal blower according to claim 4, further comprising a rectifying part (4), wherein the rectifying part (4) is arranged on the rotating shaft (2) and close to one end of the air inlet flange (11), the rectifying part (4) is in a conical structure, the center line of the cone is coincident with the rotating shaft (2), and the top of the cone is opposite to the air inlet flange (11); the vertex angle of the cone is 60-90 degrees; the rectifying component (4) extends into the air inlet flange (11).

6. A high-speed centrifugal blower according to any one of claims 2-5, characterized in that the rotating shaft (2) is provided with a first mounting hole (22), the synchronizing wheel (6) is provided with a second mounting hole (62), and after the latch structure (21) is completely inserted into the latch groove (61), the center line of the first mounting hole (22) coincides with the center line of the second mounting hole (62).

7. The high-speed centrifugal blower according to claim 6, wherein the first synchronizing wheel block (64) is provided with a third mounting hole (642), the second synchronizing wheel block (65) is provided with a fourth mounting hole (652), when the second synchronizing wheel block (65) is sleeved on the first synchronizing wheel block (64), the center line of the third mounting hole (642) is coincident with the center line of the fourth mounting hole (652), and the third mounting hole (642) and the fourth mounting hole (652) form the second mounting hole (62).

8. The high-speed centrifugal blower according to claim 7, wherein the ratio of the diameter of the impeller to the diameter of the casing (1) is 2/3 ± 10%, the air inlet flange (11) has a truncated cone-shaped cavity structure, and the ratio of the diameter of the small bottom surface to the diameter of the casing (1) is 1/3 ± 10%.

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