Anti-turbulence protective shell for centrifugal fan

Abstract

The utility model provides an anti-turbulence protective casing for centrifugal fan relates to centrifugal fan protective casing technical field, including mounting rack and set up the impeller of mounting rack inner cavity, the diversion subassembly includes mounting rack top mounting protective casing, the inner cavity of protective casing is provided with grating, the bottom of protective casing inner cavity is provided with first diversion trench, and the first diversion trench is equipped with second diversion trench. The top of the inner cavity of the protective shell is fixedly connected with a first flow guide plate, air flow can be sucked and discharged through an impeller installed in the inner cavity of the installation frame, the air flow near the impeller can be preliminarily divided through a grid arranged in the inner cavity of the protective shell, and meanwhile the air flow is guided to an inner cavity of a first flow guide groove; through the first flow guide plate installed at the bottom of the inner cavity of the protective shell, the air flow can be separated, and then the situation that the air flow collides when entering the low-pressure area from the high-pressure area, and consequently turbulent flow is caused can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan protection shell technical field especially relates to a centrifugal fan is with preventing turbulent flow protection shell. BACKGROUND

[0002] Centrifugal fan protection shell is widely used, and is commonly seen in industrial ventilation, air conditioning refrigeration, waste gas treatment and the like system, it can protect the internal components of fan from dust, water vapor erosion, prolongs fan service life, optimizes airflow path, reduces turbulent flow, improves fan operation efficiency, also has sound insulation and noise reduction function, reduces noise pollution generated during operation.

[0003] In actual work, the centrifugal fan protection shell of prior art can meet the basic requirement of protecting centrifugal fan by cooperating with sealing ring and shock pad, but the following problems still exist:

[0004] The common centrifugal fan protection shell will cause turbulent flow when protecting the fan, because the inner cavity impeller relies on centrifugal force to throw out the airflow, the airflow will enter the low pressure environment outside from the high pressure area of the impeller, resulting in sharp expansion, and then promoting the occurrence of turbulent flow, the turbulent flow will not only form obvious noise, but also affect the air outlet effect, therefore, the centrifugal fan protection shell is provided to meet the requirement. UTILITY MODEL CONTENTS

[0005] The utility model discloses a centrifugal fan protection shell to solve the technical problems in the prior art.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme: a centrifugal fan protection shell, comprising a mounting frame and an impeller arranged in the inner cavity of the mounting frame.

[0007] The flow guide assembly comprises a protective shell mounted on the top of the mounting frame, the inner cavity of the protective shell is provided with a grid, the bottom of the inner cavity of the protective shell is provided with a first flow guide groove, and the top of the inner cavity of the protective shell is fixedly connected with a first flow guide plate.

[0008] The noise reduction assembly comprises a support frame mounted on the side of the protective shell, and the side of the support frame is fixedly connected with a tooth block.

[0009] Further, the top of the first flow guide plate is provided with a slot, and the side of the first flow guide plate is provided with a first groove.

[0010] The technical effect of the above technical scheme is that the slot is provided to buffer the impact force generated when the gas contacts the first flow guide groove, and the first groove is provided to guide the airflow in the boundary layer.

[0011] Further, the top of the inner cavity of the protective shell is fixedly connected with a second flow guide plate.

[0012] The technical effects of the above technical solution are that the second flow guide plate can assist the movement of the gas.

[0013] Further, the top of the second flow guide plate is provided with a second flow guide groove.

[0014] The technical effects of the above technical solution are that the second flow guide groove can guide the discharge of the gas.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are that:

[0016] The impeller installed in the inner cavity of the mounting frame can suck and discharge the air flow, the grid installed in the inner cavity of the protective shell can preliminarily distribute the air flow near the impeller and guide the air flow to the inner cavity of the first flow guide groove, and the first flow guide plate installed at the bottom of the inner cavity of the protective shell can separate the air flow, thereby avoiding the collision of the air flow when entering the low-pressure area from the high-pressure area and causing the turbulence. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional structure schematic diagram of the protective shell against turbulence for a centrifugal fan is provided.

[0018] Figure 2 An internal section view structure schematic diagram of the protective shell against turbulence for a centrifugal fan is provided.

[0019] Figure 3 A section view structure schematic diagram of a flow guide assembly of the protective shell against turbulence for a centrifugal fan is provided.

[0020] Figure 4 A connection structure schematic diagram of a noise reduction assembly of the protective shell against turbulence for a centrifugal fan is provided.

[0021] LEGEND:

[0022] 1, mounting frame; 11, impeller;

[0023] 2, flow guide assembly; 21, protective shell; 22, grid; 23, first flow guide plate; 24, slot; 25, first flow guide groove; 26, first recess; 27, second flow guide plate; 28, second flow guide groove; 29, second recess;

[0024] 3, noise reduction assembly; 31, support frame; 32, tooth block; 33, fixed block. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0026] As shown in Figure 1 - Figure 4 The present embodiment provides a technical solution: a anti-turbulence protective shell for a centrifugal fan, a mounting frame 1 and an impeller 11 arranged in the inner cavity of the mounting frame 1;

[0027] A flow guide assembly 2, the flow guide assembly 2 comprises a protective shell 21 mounted on the top of the mounting frame 1, a grid 22 is arranged in the inner cavity of the protective shell 21, a first flow guide groove 25 is arranged on the bottom of the inner cavity of the protective shell 21, and a first flow guide plate 23 is fixedly connected to the top of the inner cavity of the protective shell 21;

[0028] A noise reduction assembly 3, the noise reduction assembly 3 comprises a support frame 31 mounted on the side of the protective shell 21, a tooth block 32 is fixedly connected to the side of the support frame 31, a notch 24 is arranged on the top of the first flow guide plate 23, a first recess 26 is arranged on the side of the first flow guide plate 23, a second flow guide plate 27 is fixedly connected to the top of the inner cavity of the protective shell 21, a second flow guide groove 28 is arranged on the top of the second flow guide plate 27, and a second recess 29 is arranged on the inner wall of the protective shell 21; by arranging the grid 22, the airflow gathered near the impeller 11 can be divided and guided; when the airflow passes through the grid 22, large-scale vortexes and turbulence are broken into small-scale flow, so that the airflow is more uniform and stable; the broken gas enters the inner cavity of the first flow guide groove 25, and is guided to move by cooperation of the first flow guide groove 25 and the first flow guide plate 23; when the gas moves to a low-pressure area, the second flow guide plate 27 and the second flow guide groove 28 are designed to be narrow to wide, so as to slow down the airflow speed, increase the static pressure of the airflow, and make the airflow flow out more smoothly; by arranging the second recess 29, the gas discharge direction can be further limited to avoid turbulence; when the gas enters the inner cavity of the first flow guide groove 25, the notch 24 arranged on the top of the first flow guide plate 23 can absorb and dissipate the energy caused by the impact of the gas, thereby reducing the impact force of the airflow on the whole flow guide plate.

[0029] Further, as shown in Figure 2 and Figure 4As shown: the side of the tooth block 32 is fixedly connected with the fixed block 33, the bottom of the fixed block 33 is fixedly connected with the inner cavity of the protective shell 21, through the support frame 31 installed on the side of the protective shell 21, so that the tooth block 32 and the fixed block 33 can be supported, the top of the tooth block 32 is provided with a certain slope, so that the gas can pass through the tooth block 32 smoothly, by setting one end of the tooth block 32 into a zigzag shape, so that the gas can be divided and disturbed when passing through, the airflow forms multiple small gas streams, reduces the overall turbulence intensity of the airflow, and further realizes the effect of noise reduction.

[0030] Working principle:

[0031] As shown: Figures 1-4 As shown:

[0032] In use: start the impeller 11, so that the gas can enter the inner cavity of the mounting frame 1, at this time the impeller 11 continues to move, so that the gas can enter the inner cavity of the first flow guide groove 25, when the gas contacts the outer surface of the grille 22, the large-scale gas vortex and turbulence is broken into small-scale flow, so that the airflow is more uniform and stable, the broken gas enters the inner cavity of the first flow guide groove 25, through the cooperation of the first flow guide plate 23 and the slot 24, so that the gas can move to the end close to the support frame 31, through the cooperation of the second flow guide plate 27 and the second flow guide groove 28, so that the gas can flow out more smoothly, when the gas passes through the tooth block 32, the gas is divided into multiple small gas streams, so that the overall turbulence intensity of the airflow can be reduced, and the effect of noise reduction can be realized.

[0033] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belongs to the protection scope of the present application.

Claims

1. A stall protection shell for a centrifugal fan, characterized by Include: Mounting frame (1) and impeller (11) arranged in the inner cavity of mounting frame (1); Flow guide assembly (2), the flow guide assembly (2) includes a protective shell (21) mounted on the top of the mounting frame (1), the inner cavity of the protective shell (21) is provided with a grid (22), the bottom of the inner cavity of the protective shell (21) is provided with a first flow guide groove (25), and the top of the inner cavity of the protective shell (21) is fixedly connected with a first flow guide plate (23); Noise reduction assembly (3), the noise reduction assembly (3) includes a support frame (31) mounted on the side of the protective shell (21), and the side of the support frame (31) is fixedly connected with a tooth block (32).

2. A swirl-proof protective casing for a centrifugal fan according to claim 1, characterized in that The top of the first flow guide plate (23) is provided with a notch (24), and the side of the first flow guide plate (23) is provided with a first recess (26).

3. A swirl-proof protective casing for a centrifugal fan according to claim 1, characterized in that The top of the protective shell (21) is fixedly connected with a second flow guide plate (27).

4. A swirl-proof protective casing for a centrifugal fan according to claim 3, characterized in that The top of the second flow guide plate (27) is provided with a second flow guide groove (28).

5. The anti-howl protective casing for a centrifugal fan of claim 1 wherein, The inner wall of the protective shell (21) is provided with a second recess (29).

6. A flow-tamper-proof housing for a centrifugal fan according to claim 1, characterized in that The side of the tooth block (32) is fixedly connected with a fixed block (33), and the bottom of the fixed block (33) is fixedly connected with the inner cavity of the protective shell (21).

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