Centrifugal fan with impeller dynamic balancing structure

Abstract

The utility model discloses a centrifugal fan with impeller dynamic balance structure relates to centrifugal fan technical field, the utility model discloses a fan shell and the impeller of setting in fan shell, the bottom outer wall fixed connection of fan shell has the supporting leg, still includes: the positioning part is set up on the fan shell, the fixed part is set up on the supporting leg, the positioning part includes positioning subassembly, and positioning subassembly installs on the fan shell, the drive assembly is installed on positioning subassembly, the positioning subassembly includes the mounting groove of setting in the bottom outer wall of fan shell, and the mounting groove is slidably connected with the mounting plate. The utility model discloses setting positioning part, solved its only can be aimed at specific width's impeller and completed positioning and balance operation, and in actual application scene, the size of impeller often exists the problem of remarkable difference, and this single adaptability to the size of impeller has greatly limited the application range of device.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal fan technology, and in particular relates to a centrifugal fan with an impeller dynamic balancing structure. Background Technology

[0002] Centrifugal fans with impeller dynamic balancing structures are ventilation devices that, based on traditional centrifugal fans, employ specialized dynamic balancing design and treatment for their core working components, the impeller. The core principle is to accurately detect the mass eccentricity of the impeller caused by uneven material distribution, manufacturing errors, or assembly deviations during high-speed rotation, and then add balancing weights to make the mass distribution of the impeller uniform and symmetrical, thereby significantly reducing the centrifugal force imbalance generated when the impeller rotates at high speed.

[0003] However, existing devices can only perform positioning and balancing operations for impellers of a specific width. In actual application scenarios, impeller sizes often vary significantly. This single adaptability to impeller size greatly limits the applicability of the device. Utility Model Content

[0004] The purpose of this invention is to provide a centrifugal fan with an impeller dynamic balancing structure. By setting a positioning part, it solves the problem that it can only perform positioning and balancing operations for impellers of a specific width. However, in actual application scenarios, impeller sizes often vary significantly. This single adaptability to impeller size greatly limits the applicability of the device.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a centrifugal fan with an impeller dynamic balance structure, including a fan casing and an impeller disposed inside the fan casing. The bottom outer wall of the fan casing is fixedly connected to a support leg. It also includes: a positioning part disposed on the fan casing; and a fixing part disposed on the support leg. The positioning part includes a positioning component mounted on the fan casing; and a driving component mounted on the positioning component. The positioning component includes a mounting groove formed on the bottom outer wall of the fan casing. A mounting plate is slidably connected in the mounting groove. Two rectangular plates are fixedly connected to the top of the mounting plate. A bidirectional screw is rotatably connected to the two rectangular plates. A gear is fixedly connected to the outer wall of the bidirectional screw. Two sliding plates are threadedly connected to the outer wall of the bidirectional screw. Several positioning guide rollers are rotatably connected to the top of each of the two sliding plates. Two balance bars are fixedly connected to the side of the two rectangular plates that are close to each other. Both balance bars pass through the two sliding plates and are slidably connected to the two sliding plates. The outer walls of the several positioning guide rollers are in contact with the impeller.

[0006] Furthermore, the fixing part includes a limiting component, which is mounted on the mounting plate; and two fixing components, which are respectively located on both sides of the support leg.

[0007] Furthermore, the drive assembly includes a rectangular groove formed at the bottom of the mounting plate, a rotating shaft rotatably connected within the rectangular groove, a gear two fixedly connected to the outer wall of the rotating shaft, and two knobs one fixedly connected to the outer wall of the rotating shaft. A sealing element is provided at the bottom of the mounting plate, the gear two meshes with the gear one, and the sealing element includes a sealing cover fixedly connected to the bottom of the mounting plate, a sliding plate one slidably connected to the sealing cover, and the sealing cover is adapted to the gear two and the two knobs one.

[0008] Furthermore, the limiting component includes several limiting rods fixedly connected to the bottom of the support leg, and several limiting grooves are opened at the bottom of the mounting plate. The bottom ends of several limiting rods extend out of several limiting grooves and are slidably connected to several limiting grooves. There are four limiting rods.

[0009] Furthermore, the fixing assembly includes two sliding rods fixedly connected to the left side of the support leg. The outer walls of the two sliding rods are slidably connected to a second sliding plate. The right side of the second sliding plate is fixedly connected to an insert rod, which passes through the support leg and is slidably connected to the support leg. The left ends of the two sliding rods are fixedly connected to a fixing plate. The fixing plate is provided with a fixing component. The right end of the insert rod extends into the mounting plate and is slidably connected to the mounting plate. The fixing component includes a screw threadedly connected to the fixing plate. The right end of the screw is rotatably connected to the second sliding plate. The outer wall of the screw is fixedly connected to a second knob.

[0010] This utility model has the following beneficial effects: 1. By setting a positioning part, when it is necessary to position the impeller inside the fan casing to maintain operational balance, first slide the slide plate one on the sealing cover outward to open the sealing cover. This sealing setting can prevent air leakage when the impeller is running, so as to operate the internal drive components. After opening, turn the knob one on the rotating shaft to drive the rotating shaft to rotate. Because the gear two on the rotating shaft meshes with the gear one on the outer wall of the bidirectional screw on the two rectangular plates, the rotation of gear two will drive the bidirectional screw on gear one to rotate synchronously with the rotating shaft through gear meshing transmission. When the bidirectional screw rotates, the two balance bars are used as guides to drive the two sliding plates on them to drive the rotating positioning guide rollers to move closer to each other, thereby completing the positioning of the impeller. Multiple positioning guide rollers can rotate synchronously with the impeller to avoid interfering with its normal operation. This setting can achieve stable positioning of the impeller and effectively ensure the operational balance performance. 2. By setting a fixing part, during installation, first place the mounting plate with the positioning part into the fan housing through the mounting groove at the bottom of the support leg. At the same time, the multiple limiting grooves of the mounting plate should be matched with the multiple limiting rods at the bottom of the support leg to limit the position of the mounting plate and prevent installation displacement. After the mounting plate and the positioning part are in place, turn the second knob on the screw to drive the screw to rotate. At this time, the screw will use the thread action of the fixing plate and the guiding action of the two sliding rods to let the second sliding plate drive the insertion rod to pass inward through the support leg and insert into the mounting plate. The other side of the support leg has the same mechanism. By operating in the same way, the fixing of both sides can be completed. This setting can realize the stable assembly of the mounting plate in the fan housing and lay a reliable foundation for subsequent positioning operations.

[0011] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial cross-sectional view of the positioning part of this utility model; Figure 3 This is a partial cross-sectional view of the fixing part of this utility model; Figure 4 This utility model Figure 2 A magnified structural diagram of A in the middle; Figure 5 This utility model Figure 3 A magnified structural diagram of B in the diagram.

[0014] The attached diagram lists the components represented by each number as follows: 111. Fan casing; 112. Impeller; 113. Support leg; 2. Positioning part; 21. Positioning assembly; 211. Mounting groove; 212. Mounting plate; 213. Rectangular plate; 214. Bidirectional screw; 215. Gear one; 216. Sliding plate; 217. Positioning guide roller; 218. Balance bar; 22. Drive assembly; 221. Rectangular groove; 222. Rotating shaft; 223. Gear two; 224. Knob one; 225. Sealing cover; 226. Slide plate one; 3. Fixing part; 31. Limiting assembly; 311. Limiting rod; 312. Limiting groove; 32. Fixing assembly; 321. Slide rod; 322. Slide plate two; 323. Insert rod; 324. Fixing plate; 325. Screw; 326. Knob two. Detailed Implementation

[0015] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 As shown, this utility model is a centrifugal fan with an impeller dynamic balance structure, including a fan housing 111 and an impeller 112 disposed inside the fan housing 111. A support leg 113 is fixedly connected to the bottom outer wall of the fan housing 111. It also includes: a positioning part 2 disposed on the fan housing 111; and a fixing part 3 disposed on the support leg 113.

[0017] The positioning unit 2 includes a positioning assembly 21, which is mounted on the fan housing 111; and a drive assembly 22, which is mounted on the positioning assembly 21. The positioning assembly 21 includes a mounting groove 211 formed on the outer wall of the bottom of the fan housing 111. A mounting plate 212 is slidably connected in the mounting groove 211. Two rectangular plates 213 are fixedly connected to the top of the mounting plate 212. A bidirectional screw 214 is rotatably connected to the two rectangular plates 213. A gear 215 is fixedly connected to the outer wall of the bidirectional screw 214. Two sliding plates 216 are threadedly connected to the outer wall of the bidirectional screw 214. Several positioning guide rollers 217 are rotatably connected to the top of each of the two sliding plates 216. 3. Two balance bars 218 are fixedly connected to each other on one side. Both balance bars 218 pass through two sliding plates 216 and are slidably connected to the two sliding plates 216. The outer walls of several positioning guide rollers 217 are in contact with the impeller 112. The drive assembly 22 includes a rectangular groove 221 opened at the bottom of the mounting plate 212. A rotating shaft 222 is rotatably connected in the rectangular groove 221. A gear 223 is fixedly connected to the outer wall of the rotating shaft 222. Two knobs 224 are fixedly connected to the outer wall of the rotating shaft 222. A sealing element is provided at the bottom of the mounting plate 212. Gear 223 meshes with gear 215. The sealing element includes a sealing cover 225 fixedly connected to the bottom of the mounting plate 212. A sliding plate 226 is slidably connected to the cover 225. The sealing cover 225 is adapted to the gear 223 and the two knobs 224. By setting the positioning part 2, when it is necessary to position the impeller 112 inside the fan housing 111 to maintain the balance of operation, the sliding plate 226 on the sealing cover 225 can be slid outward to open the sealing cover 225 to operate the internal drive assembly 22. This sealing setting can prevent air leakage when the impeller 112 is running. After the sealing cover 225 is opened, the knob 224 on the rotating shaft 222 is rotated to drive the rotating shaft 222 to rotate. Since the gear 223 connected to the rotating shaft 222 is connected to the gear on the outer wall of the bidirectional screw 214 rotating on the two rectangular plates 213, the gears are connected to the gears on the outer wall of the gears on the two rectangular plates 213. When the knob 224 drives the gear 223 to rotate via the shaft 222, the bidirectional screw 214 on the gear 215 rotates synchronously with the shaft 222 through gear meshing. When the bidirectional screw 214 rotates, it is guided by the two balance bars 218, causing the two sliding plates 216 on them to drive the rotating positioning guide rollers 217 on them to move closer to each other, thereby positioning the impeller 112 inside the fan casing 111. Since multiple positioning guide rollers 217 can rotate synchronously with the impeller 112, it can avoid interfering with the normal operation of the impeller 112. Through this setting, the impeller 112 can be stably positioned, effectively ensuring its balance performance during operation.

[0018] The fixing part 3 includes a limiting component 31, which is mounted on the mounting plate 212; and two fixing components 32, which are respectively located on both sides of the support leg 113. The limiting component 31 includes several limiting rods 311 fixedly connected to the bottom of the support leg 113. The bottom of the mounting plate 212 has several limiting grooves 312. The bottom ends of the limiting rods 311 extend outside the limiting grooves 312 and are slidably connected to them. There are four limiting rods 311. The fixing component 32... The system includes two sliding rods 321 fixedly connected to the left side of the support leg 113. A second sliding plate 322 is slidably connected to the outer wall of the two sliding rods 321. A plug rod 323 is fixedly connected to the right side of the second sliding plate 322, passing through the support leg 113 and slidably connected to it. A fixing plate 324 is fixedly connected to the left end of the two sliding rods 321. A fixing member is provided on the fixing plate 324. The right end of the plug rod 323 extends into the mounting plate 212 and slidably connects to it. The fixing member includes a screw 325 threadedly connected to the fixing plate 324. The right end of 5 is rotatably connected to the slide plate 322. The outer wall of the screw 325 is fixedly connected to the knob 326. By setting the fixing part 3, when in use, the mounting plate 212 and its positioning part 2 can be placed together from the mounting groove 211 at the bottom of the support leg 113 into the fan housing 111. When placing it, the multiple limiting grooves 312 on the mounting plate 212 must be matched with the multiple limiting rods 311 at the bottom of the support leg 113 to limit the installation position of the mounting plate 212 and prevent displacement during installation. When the mounting plate 212 and its positioning part 2 are placed into the fan housing 111, the mounting plate 212 and its positioning part 2 can be rotatably connected to the slide plate 322. After positioning, the knob 326 on the screw 325 can be rotated to drive the screw 325 to rotate. At this time, the screw 325 will use the thread action of the fixing plate 324 and the guiding action of the two slide rods 321 to make the slide plate 322 drive the insertion rod 323 on it to pass inward through the support leg 113 and insert into the mounting plate 212. At the same time, the other side of the support leg 113 is also provided with the same mechanism. The two sides can be fixed by following the same steps. Through this setting, the mounting plate 212 can be stably assembled in the fan housing 111, providing a reliable foundation for subsequent positioning operations.

[0019] A specific application of this embodiment is as follows: In use, the mounting plate 212 and its positioning part 2 can be placed together from the mounting groove 211 at the bottom of the support leg 113 into the fan housing 111. During placement, the multiple limiting grooves 312 on the mounting plate 212 must be matched with the multiple limiting rods 311 at the bottom of the support leg 113 to limit the installation position of the mounting plate 212 and prevent displacement during installation. After the mounting plate 212 and its positioning part 2 are in place, the knob 326 on the screw 325 can be rotated to drive the screw 325 to rotate. With the help of the threaded action of the fixing plate 324 and the guiding action of the two sliding rods 321, rod 325 will cause the sliding plate 322 to drive the insert rod 323 on it to pass inward through the support leg 113 and insert into the mounting plate 212. At the same time, the other side of the support leg 113 is also provided with a similar mechanism, and the two sides can be fixed by following the same steps. Through this setting, the mounting plate 212 can be stably assembled in the fan housing 111, providing a reliable foundation for subsequent positioning operations. When it is necessary to position the impeller 112 in the fan housing 111 to maintain operational balance, it can be first moved outward. The sliding plate 226 on the sliding seal cover 225 opens the seal cover 225 to operate the internal drive assembly 22. This sealing setting prevents air leakage when the impeller 112 is running. After the seal cover 225 is opened, the knob 224 on the rotating shaft 222 is rotated to drive the rotating shaft 222 to rotate. Since the gear 223 connected to the rotating shaft 222 meshes with the gear 215 on the outer wall of the bidirectional screw 214 rotating on the two rectangular plates 213, when the knob 224 drives the gear 223 to rotate through the rotating shaft 222, the transmission can be achieved through gear meshing. The bidirectional screw 214 on gear 215 rotates synchronously with the rotating shaft 222. When the bidirectional screw 214 rotates, it is guided by two balance bars 218, causing the two sliding plates 216 on them to drive the rotating positioning guide rollers 217 on them to move closer to each other, thereby positioning the impeller 112 inside the fan casing 111. Since multiple positioning guide rollers 217 can rotate synchronously with the impeller 112, it can avoid interfering with the normal operation of the impeller 112. Through this setting, the impeller 112 can be stably positioned, effectively ensuring its balance performance during operation.

[0020] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A centrifugal fan with an impeller dynamic balancing structure, comprising a fan casing (111) and an impeller (112) disposed within the fan casing (111), wherein a support leg (113) is fixedly connected to the bottom outer wall of the fan casing (111), characterized in that, Also includes: Positioning part (2), the positioning part (2) is disposed on the fan casing (111); Fixing part (3), the fixing part (3) is provided on the support leg (113); The positioning part (2) includes a positioning component (21) which is mounted on the fan casing (111); and A drive component (22) is mounted on a positioning component (21); The positioning component (21) includes a mounting groove (211) formed on the bottom outer wall of the fan housing (111). A mounting plate (212) is slidably connected in the mounting groove (211). Two rectangular plates (213) are fixedly connected to the top of the mounting plate (212). A bidirectional screw (214) is rotatably connected to the two rectangular plates (213). A gear (215) is fixedly connected to the outer wall of the bidirectional screw (214). Two sliding plates (216) are threadedly connected to the outer wall of the bidirectional screw (214). Several positioning guide rollers (217) are rotatably connected to the top of each of the two sliding plates (216). Two balance rods (218) are fixedly connected to the side of the two rectangular plates (213) that are close to each other. Both balance rods (218) pass through the two sliding plates (216) and are slidably connected to the two sliding plates (216). Among them, the outer walls of several positioning guide rollers (217) are in contact with the impeller (112).

2. A centrifugal fan with an impeller dynamic balancing structure according to claim 1, characterized in that, The fixing part (3) includes a limiting component (31) which is mounted on the mounting plate (212); and The fixing component (32) is provided in two parts, and the two fixing components (32) are respectively located on both sides of the support leg (113).

3. A centrifugal fan with an impeller dynamic balancing structure according to claim 2, characterized in that, The drive assembly (22) includes a rectangular groove (221) formed at the bottom of the mounting plate (212), a rotating shaft (222) is rotatably connected in the rectangular groove (221), a gear (223) is fixedly connected to the outer wall of the rotating shaft (222), two knobs (224) are fixedly connected to the outer wall of the rotating shaft (222), and a seal is provided at the bottom of the mounting plate (212). Among them, gear two (223) meshes with gear one (215).

4. A centrifugal fan with an impeller dynamic balancing structure according to claim 3, characterized in that, The limiting component (31) includes a plurality of limiting rods (311) fixedly connected to the bottom of the support leg (113), and a plurality of limiting grooves (312) are provided at the bottom of the mounting plate (212). The bottom ends of the plurality of limiting rods (311) extend to the outside of the plurality of limiting grooves (312) and are slidably connected to the plurality of limiting grooves (312). Among them, there are four limit rods (311).

5. A centrifugal fan with an impeller dynamic balancing structure according to claim 4, characterized in that, The fixing component (32) includes two sliding rods (321) fixedly connected to the left side of the support leg (113). The outer walls of the two sliding rods (321) are slidably connected to a second sliding plate (322). The right side of the second sliding plate (322) is fixedly connected to an insert rod (323). The insert rod (323) passes through the support leg (113) and is slidably connected to the support leg (113). The left ends of the two sliding rods (321) are fixedly connected to a fixing plate (324). The fixing plate (324) is provided with a fixing member. The right end of the insertion rod (323) extends into the mounting plate (212) and is slidably connected to the mounting plate (212).

6. A centrifugal fan with an impeller dynamic balancing structure according to claim 5, characterized in that, The sealing element includes a sealing cover (225) fixedly connected to the bottom of the mounting plate (212), and a sliding plate (226) is slidably connected to the sealing cover (225). Among them, the sealing cover (225) is adapted to the gear two (223) and the two knobs one (224).

7. A centrifugal fan with an impeller dynamic balancing structure according to claim 6, characterized in that, The fastener includes a screw (325) threaded onto a fixed plate (324), the right end of which is rotatably connected to a sliding plate (322), and a knob (326) is fixedly connected to the outer wall of the screw (325).

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