Cover plate of centrifugal fan
By incorporating an arched flow divider and filter screen into the centrifugal fan cover, combined with streamlined flow divider bars and a silencer, the problems of solid particle wear and noise are solved, achieving effective filtration and noise reduction, extending component life, and improving flow characteristics and environmental performance.
Patent Information
- Application Number
- CN202520294733.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-24
AI Technical Summary
When existing centrifugal fans handle fluids containing solid particles, the solid particles cause wear on the walls, leading to perforation of flow components and deterioration of flow characteristics, as well as high noise levels.
A centrifugal fan cover was designed, comprising an arched flow divider and a filter screen for filtering solid particles, and noise reduction and vortex generation are achieved through streamlined flow divider bars and a silencer.
It effectively filters out solid particles in fluids, prevents wear, extends component life, reduces noise, and improves flow characteristics and environmental protection capabilities.
Smart Images
Figure CN223767788U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of centrifuge technology, specifically to a centrifuge fan cover. Background Technology
[0002] Centrifugal fans, as a typical type of impeller machinery, are fluid machines that convert the mechanical energy of a prime mover into the kinetic and pressure energy of the transported gas. They can be widely used in coal pulverization, aerospace, environmental dust removal, pneumatic conveying and other applications.
[0003] When a fluid containing solid particles passes through a turbomachinery as the working medium, the solid particles entrained by the fluid will cause abrasion on the solid walls it flows through. Severe abrasion will cause the flow components to be punctured and deformed, and will deteriorate the flow characteristics inside the fan. Utility Model Content
[0004] The purpose of this utility model is to provide a centrifugal fan cover plate, aiming to at least solve the technical problems existing in the prior art. To achieve the above objective, the technical solution adopted by this utility model is as follows:
[0005] A centrifugal fan cover plate, wherein an air inlet channel is provided on one side of the outer casing of the centrifugal fan, and the cover plate is detachably and fixedly installed on the air inlet channel, the cover plate comprising:
[0006] The cover plate body is detachably and fixedly installed at the end of the air inlet channel;
[0007] The cover plate channel is integrally disposed at the center of the cover plate body and is located within the air inlet channel;
[0008] An arched flow divider is disposed within the cover plate channel. Several circular flow channels are evenly distributed within the arched flow divider, and a filter screen is disposed within each of the circular flow channels.
[0009] As a further embodiment of this utility model: a streamlined flow divider is provided on one side of the filter screen, the streamlined flow divider is located at the center of the circular flow channel, and the streamlined flow divider does not contact the inner wall of the circular flow channel.
[0010] As a further embodiment of this utility model: a silencer is also provided in the cover plate channel, and the silencer has multiple horizontally arranged sound-absorbing plates inside.
[0011] As a further embodiment of this utility model: the outer peripheral wall of the cover plate channel is attached to the inner wall of the air inlet channel.
[0012] As a further embodiment of this utility model: the cover plate body has an outer ring and an inner ring, the outer ring is detachably and fixedly installed on the side of the outer casing of the centrifugal fan, and the inner ring is detachably and fixedly installed at the end of the air inlet channel away from the outer casing.
[0013] As a further embodiment of this utility model: the cover plate channel is integrally connected to the inner ring.
[0014] This utility model has the following beneficial effects:
[0015] This utility model provides a centrifugal fan cover plate, which is provided with an arched diversion plate in the cover plate channel. The arched diversion plate has several circular flow channels evenly opened in the arched diversion plate, and a filter screen is provided in each circular flow channel. The arched surface of the arched diversion plate diverts the fluid entering the cover plate channel. The diverted fluid enters each circular flow channel and then passes through the filter screen to filter out solid particles in the fluid. This avoids the solid particles entrained by the fluid from causing abrasion on the solid wall surface through which the fluid flows, prevents wear from causing the flow components to be punctured and deformed and deteriorating the flow characteristics inside the fan, and improves the filtration efficiency.
[0016] This invention also incorporates streamlined diverting bars in each circular flow channel and silencers in the cover plate channel. The streamlined diverting bars prevent fluid from directly impacting the filter screen, avoid generating eddies in the circular flow channel, reduce noise generated when fluid passes through the circular flow channel, reduce the impact of fluid on the filter screen, and extend the service life of the filter screen. The silencers reduce the noise caused by fluid in the cover plate channel and improve the environmental protection capability of the cover plate. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings.
[0018] Figure 1 This is a side view schematic diagram of a centrifugal fan according to the present invention;
[0019] Figure 2 This is a schematic diagram of the internal structure of a centrifugal fan cover plate according to this utility model;
[0020] Figure 3 yes Figure 2 Schematic diagram of the separation structure between the middle cover and the outer shell;
[0021] Figure 4 yes Figure 3 Enlarged schematic diagram of the structure at point A in the middle;
[0022] Figure 5 This is a front view schematic diagram of the cover plate structure of this utility model.
[0023] In the diagram: 1. Outer shell; 2. Air inlet channel; 3. Cover plate body; 31. Outer ring; 32. Inner ring; 4. Cover plate channel; 5. Arched diverter plate; 6. Circular flow channel; 7. Filter screen; 8. Streamlined diverter bar; 9. Silencer; 10. Silencing plate. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model.
[0026] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0027] Example 1
[0028] Please see Figure 1-5 As shown, this embodiment provides a centrifugal fan cover plate. Please refer to [link / reference]. Figure 3 As shown, an air inlet channel 2 is provided on one side of the outer casing 1 of the centrifugal fan. Please refer to [link / reference]. Figure 2 As shown, the cover plate is detachably and fixedly installed on the air inlet channel 2. The cover plate can pre-filter out solid particles in the fluid entering the outer casing 1 from the air inlet channel 2, avoiding the abrasive effect of solid particles entrained by the fluid on the solid wall surface through which the fluid flows, and preventing wear from causing the flow components to be punctured and deformed and deteriorating the flow characteristics inside the fan.
[0029] Please see Figure 2 As shown, in this embodiment, the cover plate includes a cover plate body 3, a cover plate channel 4, an arched diverter plate 5, and a filter screen 7. The cover plate body 3 is detachably and fixedly installed at the end of the air inlet channel 2. Preferably, please refer to... Figure 3 As shown, the cover plate body 3 has an outer ring 31 and an inner ring 32. Please refer to [link / reference]. Figure 5 As shown, both the outer ring 31 and the inner ring 32 are equipped with several bolts. The outer ring 31 is detachably and fixedly installed on the side of the centrifugal fan's outer casing 1 using corresponding bolts. The inner ring 32 is detachably and fixedly installed on the end of the air inlet channel 2 away from the outer casing 1 using corresponding bolts. The cover plate channel 4 is integrally connected to the inner ring 32. This structure allows the cover plate body 3 to be securely installed on the side of the outer casing 1 and to be easily installed and removed, facilitating maintenance of the interior of the cover plate body 3. Please refer to... Figure 3 As shown, the cover channel 4 is integrally disposed at the center of the cover body 3. Please refer to [link / reference]. Figure 2 As shown, the cover channel 4 is located inside the air inlet channel 2. Preferably, the outer peripheral wall of the cover channel 4 is fitted to the inner wall of the air inlet channel 2, making the overall structure of the cover body 3 more stable after installation and preventing it from shaking under the impact of fluid.
[0030] Please see Figure 3 As shown, the arched diversion plate 5 is installed in the cover plate channel 4. The arched surface of the arched diversion plate 5 diverts the fluid entering the cover plate channel 4. Several circular channels 6 are evenly opened in the arched diversion plate 5. Each circular channel 6 is equipped with a filter screen 7. The diverted fluid enters each circular channel 6 and then passes through the filter screen 7 to filter out solid particles in the fluid.
[0031] Example 2
[0032] Please see Figure 2 As shown in the figure, based on the first embodiment, in this embodiment, a streamlined flow divider 8 is also provided on one side of the filter screen 7. The streamlined flow divider 8 is located at the center of the circular flow channel 6, and the streamlined flow divider 8 does not contact the inner wall of the circular flow channel 6. By providing the streamlined flow divider 8, the fluid can be prevented from directly impacting the filter screen 7, avoiding the generation of eddies in the circular flow channel 6, reducing the noise generated when the fluid passes through the circular flow channel 6, reducing the impact of the fluid on the filter screen 7, and extending the service life of the filter screen 7.
[0033] Further, please refer to Figure 3 As shown, a silencer 9 is also installed in the cover channel 4. The silencer 9 has multiple horizontally arranged sound-absorbing plates 10 inside. After the filtered fluid passes through the silencer 9, the noise caused by the fluid in the cover channel 4 is reduced, thus improving the environmental protection capability of the cover.
[0034] In summary, the centrifugal fan cover plate provided by this utility model features an arched diversion plate 5 within the cover plate channel 4. The arched diversion plate 5 contains several evenly spaced circular flow channels 6, each with a filter screen 7. The arched surface of the diversion plate 5 diverts the fluid entering the cover plate channel 4. The diverted fluid then enters each circular flow channel 6 and passes through the filter screen 7 to remove solid particles. This prevents solid particles carried by the fluid from causing abrasion on the solid surfaces they pass through, thus preventing wear that could perforate or deform the flow components and worsen the flow characteristics within the fan. Furthermore, it improves filtration efficiency. Furthermore, by installing streamlined diverting rods 8 in each circular flow channel 6 and silencers 9 in the cover channel 4, the streamlined diverting rods 8 can prevent the fluid from directly impacting the filter screen 7, avoid generating eddies in the circular flow channel 6, reduce the noise generated when the fluid passes through the circular flow channel 6, and also reduce the impact of the fluid on the filter screen 7, thus extending the service life of the filter screen 7. The silencers 9 reduce the noise caused by the fluid in the cover channel 4, thereby improving the environmental protection capability of the cover.
[0035] The preferred embodiments of this utility model have been described in detail above and should not be considered as limiting the scope of this utility model. All equivalent changes and improvements made within the scope of the claims of this utility model should still fall within the patent coverage of this utility model.
Claims
1. A centrifugal fan cover plate, the centrifugal fan having a housing (1) provided with an air inlet passage (2) on one side, characterized in that, The cover plate is detachably fixed on the air inlet channel (2), and the cover plate comprises: A cover plate body (3) is detachably fixed on the end of the air inlet channel (2); A cover plate channel (4) is integrally arranged in the center of the cover plate body (3), and the cover plate channel (4) is located in the air inlet channel (2); An arc-shaped flow distribution plate (5) is arranged in the cover plate channel (4), and a plurality of circular flow channels (6) are uniformly arranged in the arc-shaped flow distribution plate (5), and a filter screen (7) is arranged in each circular flow channel (6).
2. A centrifugal fan cover plate according to claim 1, characterized in that: A streamlined flow distribution rod (8) is arranged on one side of the filter screen (7), the streamlined flow distribution rod (8) is located in the center of the circular flow channel (6), and the streamlined flow distribution rod (8) is not in contact with the inner wall of the circular flow channel (6).
3. A centrifugal fan cover plate according to claim 2, characterized in that: A sound absorber (9) is further arranged in the cover plate channel (4), and a plurality of transversely arranged sound absorbing sheets (10) are arranged in the sound absorber (9).
4. A centrifugal fan cover plate according to claim 1, characterized in that: The outer peripheral wall of the cover plate channel (4) is attached to the inner wall of the air inlet channel (2).
5. A centrifugal fan cover plate according to claim 1, characterized in that: The cover plate body (3) has an outer ring (31) and an inner ring (32), the outer ring (31) is detachably fixed on the side of the outer shell (1) of the centrifugal fan, and the inner ring (32) is detachably fixed on the end of the air inlet channel (2) away from the outer shell (1).
6. A centrifugal fan cover plate according to claim 5, characterized in that: The cover plate channel (4) is integrally connected to the inner ring (32).