CN113217414A - Multistage centrifugal fan - Google Patents
Multistage centrifugal fan Download PDFInfo
- Publication number
- CN113217414A CN113217414A CN202110591306.9A CN202110591306A CN113217414A CN 113217414 A CN113217414 A CN 113217414A CN 202110591306 A CN202110591306 A CN 202110591306A CN 113217414 A CN113217414 A CN 113217414A
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- Prior art keywords
- centrifugal fan
- fan main
- air
- multistage centrifugal
- fixedly connected
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/164—Multi-stage fans, e.g. for vacuum cleaners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/003—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by throttling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
- F04D29/464—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of centrifugal fans, in particular to a multistage centrifugal fan which comprises a centrifugal fan main body, wherein an air inlet end of the centrifugal fan main body is connected with a filtering structure and an air quantity control structure, the filtering structure is provided with a limiting structure, and the air quantity control structure is provided with an indicating structure; can carry out preliminary interception filtration through filtration to the air that gets into in the multistage centrifugal fan, prevent that debris in the air from entering into multistage centrifugal fan's inside, avoid influencing multistage centrifugal fan's normal work, avoid the emergence of trouble, can artificial intervention enter into the inside amount of wind of multistage centrifugal fan through the amount of wind control structure, in order to satisfy different work demands, can be fixed firm between filtration and the centrifugal fan main part through limit structure, prevent breaking away from of fixed knot structure, can be when adjusting the amount of wind through the amount of wind control structure through instructing the structure, be convenient for observe the amount of wind regulation size.
Description
Technical Field
The invention relates to the technical field of centrifugal fans, in particular to a multistage centrifugal fan.
Background
The centrifugal fan is a driven fluid machine which is common in a fresh air system, can improve the output of air quantity, and needs to be used for controlling the air quantity and influencing the work of the multistage centrifugal fan due to the fact that sundries enter the multistage centrifugal fan.
However, traditional centrifugal fan often does not install the filter equipment, can not carry out the prefilter to debris in the air, and great debris enter into multistage centrifugal fan after, can influence the normal work of multistage centrifugal extension to be not convenient for carry out artificial intervention nature to the amount of wind and adjust, be not convenient for control the amount of wind when needs.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a multistage centrifugal fan.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a multistage centrifugal fan, includes the centrifugal fan main part, the air inlet end of centrifugal fan main part is connected with filtration and air volume control structure, limit structure is installed to filtration, the instruction structure is installed to air volume control structure.
Specifically, filtration includes fixed frame, the air intake end sliding connection of centrifugal fan main part has fixed frame, the inside both sides fixedly connected with lifting piece of centrifugal fan main part, the lifting piece is three horn shapes, a pair of handles of outside fixedly connected with of fixed frame, the filter screen has been cup jointed to fixed frame, the inside one end fixedly connected with rubber pad that is close to in the filter screen of centrifugal fan main part, the top and the rubber pad of filter screen are contradicted.
Concretely, the air volume control structure includes the transmission shaft, the air inlet end of centrifugal fan main part rotates and is connected with the transmission shaft, and is a plurality of the equal fixedly connected with accuse aerofoil of transmission shaft, and is a plurality of the bottom of accuse aerofoil is rotated and is connected with the pulling plate, centrifugal fan main part sliding connection has the promotion piece, it is equipped with the promotion groove to promote piece one end, the promotion groove is the slope form, is close to in the accuse aerofoil fixedly connected with who promotes piece one end promotes the axle, promote the axle through promoting the groove and promoting a sliding fit, centrifugal fan main part one end is rotated and is connected with the promotion lead screw, promote the screw thread end of lead screw and the one end threaded connection who promotes the piece.
Specifically, limit structure includes the gag lever post, the both ends sliding connection of centrifugal fan main part has the gag lever post, the one end of gag lever post is the inclined plane form, fixed frame is equipped with the spacing groove near the both ends in a pair of gag lever post respectively, the spacing inslot is the inclined plane form, gag lever post and spacing groove are contradicted, the one end screw thread of gag lever post is connected with spacing lead screw, spacing lead screw's one end and centrifugal fan main part rotate to be connected.
The indicating structure comprises a fixed disc, a fixed disc is fixedly connected with one end of the centrifugal fan body, a standard disc is fixedly connected inside the fixed disc, the fixed disc and the standard disc are circular, the fixed disc and the standard disc are close to the transmission shaft at one end of the fixed disc penetrate through and are rotatably connected with the fixed disc and the standard disc, and a pointer is fixedly connected with the penetration end of the transmission shaft.
The invention has the beneficial effects that:
(1) according to the multistage centrifugal fan, the air inlet end of the centrifugal fan main body is connected with the filtering structure and the air volume control structure, air entering the multistage centrifugal fan can be initially intercepted and filtered through the filtering structure, impurities in the air are prevented from entering the multistage centrifugal fan, the influence on the normal work of the multistage centrifugal fan is avoided, the occurrence of faults is avoided, the air volume entering the multistage centrifugal fan can be manually interfered through the air volume control structure, and different work requirements are met, namely: the multistage centrifugal fan is mainly used for conveying air quantity, in order to reduce the entering of sundries in the air into the multistage centrifugal fan, a centrifugal fan main body is abutted with a filter screen through a fixing frame in sliding connection, the sundries in the air can be preliminarily intercepted, when the multistage centrifugal fan is installed, the filter screen is firstly sleeved into the fixing frame, the fixing frame is pushed into the air inlet end of the centrifugal fan main body, the bottom end of the fixing frame is abutted with a lifting block, the lifting block is in a triangular shape, when the fixing frame is pushed into the centrifugal fan main body, the fixing frame simultaneously moves towards the end of a rubber pad fixed in the centrifugal fan main body and drives the top end of the filter screen to be abutted with the rubber pad, so that the air entering the centrifugal fan main body is ensured to be preferentially filtered and intercepted through the filter screen, and the filter screen can be separated from the rubber pad by pulling the fixing frame towards the outer side of the centrifugal fan main body through a pull handle, the filter screen can be taken out, the filter screen can be replaced, the filter screen can preliminarily intercept and filter air entering the multistage centrifugal fan, sundries in the air are prevented from entering the multistage centrifugal fan, the normal work of the multistage centrifugal fan is prevented from being influenced, the occurrence of faults is avoided, in order to meet the requirements of different works, the air quantity entering the multistage centrifugal fan, namely the air quantity control is required to be manually interfered, the air quantity is pushed into the multistage centrifugal fan, the push screw rod is pushed by rotation, one end of the push screw rod is in threaded connection with the push block, the push block in sliding connection with the centrifugal fan main body is driven to move in the horizontal direction, as one end of the push block is provided with the push groove, the push shaft is in sliding fit with the push block through the push groove, the push shaft is driven to move, the push shaft is fixedly connected with the air control plate, the air control plate is driven to rotate, and the air control plates are linked through the pull plate, therefore, the multi-control air plates are driven to rotate simultaneously, when the air control plates are in a horizontal state, the air quantity entering the interior of the centrifugal fan main body is minimum, and when the air control plates are in a vertical state, the air quantity entering the interior of the centrifugal fan main body is maximum, so that the screw rod is pushed to manually intervene to enter the air quantity inside the multistage centrifugal fan, and different working requirements are met.
(2) According to the multistage centrifugal fan, the filter structure is provided with the limiting structure, the filter structure and the centrifugal fan main body can be firmly fixed through the limiting structure, and the separation of the fixing structure is prevented, namely: when the fixing frame is pushed into the centrifugal fan main body, in order to make the filter screen contact with the rubber pad tightly and make all the air entering the centrifugal fan main body pass through the filter screen for filtration and interception preferentially, the limiting screw rod is rotated, one end of the limiting screw rod is connected with a limiting rod in a threaded manner, the limiting rod is connected with the centrifugal fan main body in a sliding manner, so that the limiting rod enters the limiting groove, because one end of the limiting rod is in an inclined plane shape, the limiting groove is in an inclined plane shape, the limiting rod is in contact with the limiting groove, when the limiting rod continues to move towards the inside of the limiting groove, the limiting rod pushes the fixing frame towards the inside of the centrifugal fan main body, the bottom end of the fixing frame is in contact with the lifting block and makes the fixing frame move towards the rubber pad, so that the rubber pad is in contact with the filter screen tightly, the limiting screw rod can be rotated reversely, so that the fixing between the filter screen and the centrifugal fan main body is fixed firmly, the separation of the fixing frame is prevented.
(3) According to the multistage centrifugal fan, the air volume control structure is provided with the indicating structure, and the air volume adjustment size can be conveniently observed when the air volume is adjusted through the air volume control structure through the indicating structure, namely: when adjusting accuse aerofoil through promoting the lead screw, centrifugal fan main part one end fixedly connected with fixed disk, the inside fixedly connected with mark dish of fixed disk, the transmission shaft that is close to in fixed disk one end runs through and rotate and connect in fixed disk and mark dish, the through end fixedly connected with pointer of transmission shaft, so when accuse aerofoil rotates, will drive transmission shaft and pointer and rotate, according to the size of the clear observation accuse aerofoil of mark dish to air regulation.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of an overall structure of a preferred embodiment of a multistage centrifugal fan provided in the present invention;
FIG. 2 is an enlarged view of the part A shown in FIG. 1;
FIG. 3 is a schematic view of the connection structure between the centrifugal fan body and the filter structure shown in FIG. 1;
fig. 4 is a schematic view of a connection structure of the centrifugal fan main body and the air volume control structure shown in fig. 1;
FIG. 5 is an enlarged view of the structure of the portion B shown in FIG. 4;
FIG. 6 is a schematic view of a connection structure between the filtering structure and the air volume control structure shown in FIG. 1;
fig. 7 is an enlarged view of the structure of the portion C shown in fig. 6.
In the figure: 1. centrifugal fan main part, 2, filtration, 21, fixed frame, 22, handle, 23, rubber pad, 24, lifting piece, 25, filter screen, 3, amount of wind control structure, 31, accuse aerofoil, 32, promote the lead screw, 33, the pulling plate, 34, the transmission shaft, 35, promote the piece, 36, promote the groove, 37, promote the axle, 4, limit structure, 41, spacing lead screw, 42, gag lever post, 43, spacing groove, 5, instruction structure, 51, fixed disk, 52, pointer, 53, the mark dish.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-7, the multistage centrifugal fan comprises a centrifugal fan main body 1, wherein an air inlet end of the centrifugal fan main body 1 is connected with a filtering structure 2 and an air volume control structure 3, the filtering structure 2 is provided with a limiting structure 4, and the air volume control structure 3 is provided with an indicating structure 5.
Specifically, the filter structure 2 comprises a fixed frame 21, the fixed frame 21 is connected to the air inlet end of the centrifugal fan main body 1 in a sliding manner, lifting blocks 24 are fixedly connected to two sides of the inside of the centrifugal fan main body 1, the lifting blocks 24 are triangular, a pair of handles 22 are fixedly connected to the outer side of the fixed frame 21, the fixed frame 21 is sleeved with a filter screen 25, a rubber pad 23 is fixedly connected to one end, close to the filter screen 25, of the inside of the centrifugal fan main body 1, and the top end of the filter screen 25 is abutted to the rubber pad 23; can carry out preliminary interception through filtration 2 and filter the air that gets into in the multistage centrifugal fan, prevent that debris in the air from entering into multistage centrifugal fan's inside, avoid influencing multistage centrifugal fan's normal work, avoid the emergence of trouble, promptly: the multistage centrifugal fan is mainly used for conveying air volume, in order to reduce the entering of sundries in the air into the multistage centrifugal fan, the centrifugal fan main body 1 is abutted with the filter screen 25 through the fixing frame 21 in sliding connection, the sundries in the air can be preliminarily intercepted, when the multistage centrifugal fan is installed, the filter screen 25 is firstly sleeved into the fixing frame 21, the fixing frame 21 is pushed into the inner part of the air inlet end of the centrifugal fan main body 1, the bottom end of the fixing frame 21 is abutted with the lifting block 24, the lifting block 24 is in a triangular shape, when the fixing frame 21 is pushed inside the centrifugal fan main body 1, the fixing frame 21 simultaneously moves towards the end of the rubber gasket 23 fixed inside the centrifugal fan main body 1 and drives the top end of the filter screen 25 to abut against the rubber gasket 23, thereby ensuring that all the air entering into the centrifugal fan main body 1 is preferentially filtered and intercepted through the filter screen 25, and the rubber gasket 23 can be separated by pulling the fixing frame 21 to the outer side of the centrifugal fan main body 1 through the handle 22, alright take out filter screen 25, alright change filter screen 25 to filter screen 25 can carry out preliminary interception to the air that gets into in the multistage centrifugal fan in the area and filter, prevents that the debris in the air from entering into multistage centrifugal fan's inside, avoids influencing multistage centrifugal fan's normal work, avoids the emergence of trouble.
Specifically, the air volume control structure 3 comprises a transmission shaft 34, the air inlet end of the centrifugal fan main body 1 is rotatably connected with the transmission shaft 34, the transmission shafts 34 are fixedly connected with an air control plate 31, the bottom ends of the air control plates 31 are rotatably connected with a pulling plate 33, the centrifugal fan main body 1 is slidably connected with a pushing block 35, one end of the pushing block 35 is provided with a pushing groove 36, the pushing groove 36 is inclined, the air control plate 31 close to one end of the pushing block 35 is fixedly connected with a pushing shaft 37, the pushing shaft 37 is in sliding fit with the pushing block 35 through the pushing groove 36, one end of the centrifugal fan main body 1 is rotatably connected with a pushing screw rod 32, and the threaded end of the pushing screw rod 32 is in threaded connection with one end of the pushing block 35; can the artificial intervention enter into the inside amount of wind of multistage centrifugal fan through amount of wind control structure 3 to satisfy different work demands, promptly: in order to meet the requirements of different works and control the air quantity, namely the air quantity, entering the interior of the multistage centrifugal fan by human intervention, namely the control of the air quantity, the air quantity is pushed out by rotating the pushing screw rod 32, one end of the pushing screw rod 32 is in threaded connection with the pushing block 35, the pushing block 35 in sliding connection with the centrifugal fan main body 1 is driven to move in the horizontal direction, as one end of the pushing block 35 is provided with the pushing groove 36, the pushing shaft 37 is in sliding fit with the pushing block 35 through the pushing groove 36, the pushing shaft 37 is driven to move, the pushing shaft 37 is fixedly connected with the air control plates 31, the air control plates 31 are driven to rotate, the plurality of air control plates 31 are linked through the pulling plates 33, the plurality of air control plates 31 are driven to rotate simultaneously, when the air control plates 31 are in the horizontal state, the air quantity entering the interior of the centrifugal fan main body 1 is the minimum, and when the air control plates 31 are in the vertical state, the air quantity entering the interior of the centrifugal fan main body 1 is the maximum, therefore, the screw rod 32 can be pushed to manually intervene to enter the air quantity inside the multistage centrifugal fan so as to meet different working requirements.
Specifically, the limiting structure 4 includes a limiting rod 42, two ends of the centrifugal fan main body 1 are slidably connected with the limiting rod 42, one end of the limiting rod 42 is in an inclined plane shape, the fixing frame 21 is provided with a limiting groove 43 respectively close to two ends of the pair of limiting rods 42, the limiting groove 43 is in an inclined plane shape, the limiting rod 42 is abutted against the limiting groove 43, one end of the limiting rod 42 is connected with a limiting screw rod 41 in a threaded manner, and one end of the limiting screw rod 41 is rotatably connected with the centrifugal fan main body 1; can be fixed firm between filtration 2 and centrifugal fan main part 1 through limit structure 4, prevent breaking away from of fixed knot structure, promptly: when the fixing frame 21 is pushed into the centrifugal fan main body 1, in order to make the filter screen 25 contact with the rubber pad 23 tightly and make all the air entering the centrifugal fan main body 1 pass through the filter screen 25 preferentially for filtration and interception, the limit screw 41 is rotated, one end of the limit screw 41 is connected with the limit rod 42 in a threaded manner, the limit rod 42 is connected with the centrifugal fan main body 1 in a sliding manner, so that the limit rod 42 enters the limit groove 43, because one end of the limit rod 42 is in an inclined plane shape, the limit groove 43 is in an inclined plane shape, the limit rod 42 is abutted against the limit groove 43, when the limit rod 42 continues to move towards the inside of the limit groove 43, the limit rod 42 pushes the fixing frame 21 towards the inside of the centrifugal fan main body 1, the bottom end of the fixing frame 21 is abutted against the lifting block 24, and the fixing frame 21 is moved towards the direction of the rubber pad 23, so that the rubber pad 23 is abutted against the filter screen 25 tightly, and the limit can be released by reversely rotating the limit screw 41, thereby, the filter net 25 and the centrifugal fan main body 1 can be firmly fixed through the limiting screw rod 41, and the separation of the fixing frame 21 is prevented.
Specifically, the indicating structure 5 comprises a fixed disc 51, one end of the centrifugal fan main body 1 is fixedly connected with the fixed disc 51, a target disc 53 is fixedly connected inside the fixed disc 51, the fixed disc 51 and the target disc 53 are both circular, a transmission shaft 34 close to one end of the fixed disc 51 penetrates through and is rotatably connected with the fixed disc 51 and the target disc 53, and a pointer 52 is fixedly connected to the penetration end of the transmission shaft 34; can be when adjusting the amount of wind through amount of wind control structure 3 through instruction structure 5, be convenient for observe the amount of wind regulation size, promptly: when adjusting accuse wind board 31 through promoting lead screw 32, centrifugal fan main part 1 one end fixedly connected with fixed disk 51, the inside fixedly connected with scale 53 of fixed disk 51, transmission shaft 34 that is close to fixed disk 51 one end runs through and rotates and connect in fixed disk 51 and scale 53, the through end fixedly connected with pointer 52 of transmission shaft 34, so when accuse wind board 31 rotates, will drive transmission shaft 34 and pointer 52 and rotate, according to the size of the clear observation accuse wind board 31 of scale 53 to the air regulation.
When the invention is used, the multi-stage centrifugal fan is mainly used for conveying air volume, in order to reduce the entering of sundries in the air into the multi-stage centrifugal fan, the centrifugal fan main body 1 is abutted with the filter screen 25 through the fixing frame 21 which is in sliding connection, and can preliminarily intercept sundries in the air, when the invention is installed, the filter screen 25 is firstly sleeved into the fixing frame 21, when the fixing frame 21 is pushed into the inner part of the air inlet end of the centrifugal fan main body 1, the bottom end of the fixing frame 21 is abutted with the lifting block 24, the lifting block 24 is in a triangular shape, when the fixing frame 21 is pushed in the inner part of the centrifugal fan main body 1, the fixing frame 21 simultaneously moves towards the end of the rubber pad 23 fixed in the centrifugal fan main body 1, and drives the top end of the filter screen 25 to abut with the rubber pad 23, thereby ensuring that all the air entering the inner part of the centrifugal fan main body 1 is preferentially filtered and intercepted through the filter screen 25, the filter screen 25 can be separated from the rubber pad 23 by pulling the fixing frame 21 to the outer side of the centrifugal fan main body 1 through the handle 22, the filter screen 25 can be taken out, and the filter screen 25 can be replaced, so that the filter screen 25 can primarily intercept and filter air entering the multistage centrifugal fan, sundries in the air are prevented from entering the multistage centrifugal fan, the normal work of the multistage centrifugal fan is prevented from being influenced, and the fault is avoided, in order to meet the requirements of different works, the air quantity entering the multistage centrifugal fan, namely the air output quantity is controlled through manual intervention, the pushing screw rod 32 is pushed by rotating, one end of the pushing screw rod 32 is in threaded connection with the pushing block 35, the pushing block 35 in sliding connection with the centrifugal fan main body 1 is driven to move in the horizontal direction, because one end of the pushing block 35 is provided with the pushing groove 36, the pushing shaft 37 is in sliding fit with the pushing block 35 through the pushing groove 36, therefore, the pushing shaft 37 is driven to move, the pushing shaft 37 is fixedly connected with the air control plates 31, so that the air control plates 31 are driven to rotate, the plurality of air control plates 31 are linked through the pulling plate 33, so that the plurality of air control plates 31 are driven to rotate simultaneously, when the air control plates 31 are in a horizontal state, the air quantity entering the centrifugal fan main body 1 is minimum, when the air control plates 31 are in a vertical state, the air quantity entering the centrifugal fan main body 1 is maximum, so that the air quantity entering the multistage centrifugal fan can be manually interfered by the pushing screw rod 32 to meet different working requirements, when the fixing frame 21 is pushed into the centrifugal fan main body 1, in order to enable the filter screen 25 to be tightly contacted with the rubber pad 23 and enable all the air entering the centrifugal fan main body 1 to be preferentially filtered and intercepted through the filter screen 25, the limiting screw rod 41 is rotated, one end of the limiting screw rod 41 is in threaded connection with the limiting rod 42, the limiting rod 42 is connected with the centrifugal fan main body 1 in a sliding way, so that the limiting rod 42 enters the limiting groove 43, because one end of the limiting rod 42 is in a slope shape, the limiting groove 43 is in a slope shape, the limiting rod 42 is abutted with the limiting groove 43, when the limiting rod 42 continues to move towards the limiting groove 43, the limiting rod 42 pushes the fixing frame 21 towards the inside of the centrifugal fan main body 1, the bottom end of the fixing frame 21 is abutted with the lifting block 24, the fixing frame 21 is moved towards the rubber pad 23, the rubber pad 23 is tightly abutted with the filter screen 25, the limiting can be released by reversely rotating the limiting screw rod 41, so that the filter screen 25 and the centrifugal fan main body 1 can be firmly fixed through the limiting screw rod 41, the separation of the fixing frame 21 is prevented, when the air control plate 31 is adjusted through the pushing screw rod 32, one end of the centrifugal fan main body 1 is fixedly connected with the fixed disc 51, the standard disc 53 is fixedly connected inside the fixed disc 51, the transmission shaft 34 close to one end of the fixed disc 51 penetrates through and is connected with the fixed disc 51 and the target disc 53 in a rotating mode, and the pointer 52 is fixedly connected with the transmission shaft 34 in a penetrating mode, so that when the air control plate 31 rotates, the transmission shaft 34 and the pointer 52 are driven to rotate, and the air control plate 31 can be clearly observed to adjust the air volume according to the target disc 53.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. 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 (10)
1. The utility model provides a multistage centrifugal fan, its characterized in that includes centrifugal fan main part (1), the air inlet end of centrifugal fan main part (1) is connected with filtration (2) and air volume control structure (3), limit structure (4) are installed in filtration (2), instruction structure (5) are installed in air volume control structure (3).
2. The multistage centrifugal fan of claim 1, wherein: filtration (2) are including fixed frame (21), the air intake end sliding connection of centrifugal fan main part (1) has fixed frame (21), inside both sides fixedly connected with lifting piece (24) of centrifugal fan main part (1), lifting piece (24) are three horn shapes, a pair of handle (22) of outside fixedly connected with of fixed frame (21).
3. The multistage centrifugal fan of claim 2, wherein: the filter screen (25) has been cup jointed to fixed frame (21), the inside one end fixedly connected with rubber pad (23) that is close to in filter screen (25) of centrifugal fan main part (1), the top and rubber pad (23) of filter screen (25) are contradicted.
4. The multistage centrifugal fan of claim 3, wherein: air volume control structure (3) include transmission shaft (34), the air intake end of centrifugal fan main part (1) rotates and is connected with transmission shaft (34), and is a plurality of the equal fixedly connected with accuse aerofoil (31) of transmission shaft (34), it is a plurality of the bottom of accuse aerofoil (31) is rotated and is connected with pulling plate (33).
5. The multistage centrifugal fan of claim 4, wherein: centrifugal fan main part (1) sliding connection has and promotes piece (35), it is equipped with promotion groove (36) to promote piece (35) one end, it is the slope form to promote groove (36), is close to in it promotes axle (37) to promote accuse aerofoil (31) fixedly connected with of piece (35) one end, it passes through promotion groove (36) and promotes piece (35) sliding fit to promote axle (37).
6. The multistage centrifugal fan of claim 5, wherein: one end of the centrifugal fan main body (1) is rotatably connected with a pushing screw rod (32), and a threaded end of the pushing screw rod (32) is in threaded connection with one end of a pushing block (35).
7. The multistage centrifugal fan of claim 6, wherein: limit structure (4) include gag lever post (42), the both ends sliding connection of centrifugal fan main part (1) has gag lever post (42), the one end of gag lever post (42) is the inclined plane form, fixed frame (21) are close to respectively in the both ends of a pair of gag lever post (42) and are equipped with spacing groove (43), be the inclined plane form in spacing groove (43), gag lever post (42) and spacing groove (43) are contradicted.
8. The multistage centrifugal fan of claim 7, wherein: one end of the limiting rod (42) is connected with a limiting screw rod (41) in a threaded manner, and one end of the limiting screw rod (41) is rotatably connected with the centrifugal fan main body (1).
9. The multi-stage centrifugal fan of claim 8, wherein: instruction structure (5) are including fixed disk (51), centrifugal fan main part (1) one end fixedly connected with fixed disk (51), fixed disk (51) inside fixedly connected with mark dish (53), fixed disk (51) and mark dish (53) all are circular.
10. The multistage centrifugal fan of claim 9, wherein: a transmission shaft (34) close to one end of the fixed disc (51) penetrates through and is rotatably connected with the fixed disc (51) and the target disc (53), and a pointer (52) is fixedly connected with the penetrating end of the transmission shaft (34).
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| CN202110591306.9A CN113217414A (en) | 2021-05-28 | 2021-05-28 | Multistage centrifugal fan |
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