CN111140536A - Semi-open type shunting small-flow high-pressure centrifugal fan impeller - Google Patents
Semi-open type shunting small-flow high-pressure centrifugal fan impeller Download PDFInfo
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- CN111140536A CN111140536A CN201811300160.2A CN201811300160A CN111140536A CN 111140536 A CN111140536 A CN 111140536A CN 201811300160 A CN201811300160 A CN 201811300160A CN 111140536 A CN111140536 A CN 111140536A
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A semi-open type flow-dividing low-flow high-pressure centrifugal fan impeller relates to the technical field of fans, and particularly relates to a semi-open type flow-dividing low-flow high-pressure centrifugal fan impeller. It contains streamlined long blade, export reposition of redundant personnel short blade, impeller back plate, semi-open front disc, axle sleeve, streamlined long blade evenly distributed and welding on the impeller back plate, streamlined long blade divide into the three-section, the formula induction zone that leans forward, oblique line type interlude and little back-tilting outlet section, the entrance angle of streamlined long blade is 43, the exit angle is 100, export reposition of redundant personnel short blade evenly distributed and weld in the centre of the export runner of streamlined long blade, semi-open front disc is the double-arc line type, the welding is in the entrance section of streamlined long blade, the axle sleeve is located the centre of semi-open front disc. After the technical scheme is adopted, the invention has the beneficial effects that: the fan improves the operation efficiency of the fan, can reduce noise and manufacture difficulty, and ensures the operation safety of the fan.
Description
Technical Field
The invention relates to the technical field of fans, in particular to a semi-open type flow-dividing low-flow high-pressure centrifugal fan impeller.
Background
The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. The blower is a Chinese habit abbreviation for gas compression and gas conveying machinery, and the blower generally comprises a ventilator, a blower and a wind driven generator. Fans are widely used for ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, and for ventilation and draught of boilers and industrial furnaces and kilns; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grain, wind tunnel wind source and air cushion boat inflating and propelling. The fan is related to the transmission and distribution energy consumption of the system and is a very critical part for building energy conservation. Fan testing shows that many fans have problems under rated conditions, and therefore the fans need to be produced and manufactured strictly according to product standard requirements. The fan is mainly applied to ventilation in various fields of national economy such as metallurgy, petrifaction, electric power, urban rail transit, textile, ships and the like and various places. Besides the traditional application field, the method still has a great development prospect in more than 20 potential market fields such as comprehensive utilization of coal gangue, technical improvement of novel dry clinker, energy conservation and comprehensive utilization of resources in metallurgical industry and the like. The small-flow high-pressure centrifugal fan is widely applied to large-scale power consumption industries such as steel, building materials, chemical engineering, power plants and the like, the conventional fan is a forward-inclined centrifugal fan, the representative small-flow high-pressure centrifugal fans are 8-09, 9-12, 9-19 and the like, and the fans are forward-inclined and are widely applied in the market. The flow channels of the blades are in a forward-inclined type, the boundary layer separation of the fans is large, and the internal flow field is severe, so the fans have the defects of low efficiency, high noise and the like, and the fans have narrow impellers, are difficult to manufacture and weld, often lack welding in the middle of the impeller and have some potential safety hazards. However, the fan impeller commonly used in the current market has the problems of low flow, high pressure, low efficiency, high noise, high manufacturing difficulty and the like.
Disclosure of Invention
The invention aims to provide a semi-open type shunting small-flow high-pressure centrifugal fan impeller aiming at the defects and shortcomings of the prior art, the inlet section of a streamline long-time piece of the impeller is forward inclined, the outlet of the impeller is slightly backward inclined, the flow field characteristics of a fan flow channel can be improved, the fan efficiency is improved, and the aerodynamic noise is reduced; the outlet shunting short blade is arranged in the middle of the outlet flow channel of the long blade, so that the grid pitch of the blade is reduced, the consistency is increased, a jet flow-wake structure is broken, the pressure of the fan is improved, and the pneumatic performance of the fan is improved; the impeller is semi-open type, can solve the problem that the manufacturing and processing difficulty is big, and the welding of front disc and blade all can the full weld, improves fan operation intensity performance, ensures operation safety.
In order to achieve the purpose, the invention adopts the following technical scheme: the novel high-efficiency energy-saving turbine comprises streamline long blades 1, forward-inclined inlet sections 11, oblique line type middle sections 12, micro backward-inclined outlet sections 13, outlet shunting short blades 2, an impeller rear disc 3, a semi-open front disc 4 and a shaft sleeve 5, wherein sixteen streamline long blades 1 are arranged, the sixteen streamline long blades 1 are evenly distributed and welded on the impeller rear disc 3, the streamline long blades 1 are divided into three sections which are respectively the forward-inclined inlet sections 11, the oblique line type middle sections 12 and the micro backward-inclined outlet sections 13, the inlet angle of each streamline long blade 1 is 43 degrees, the outlet angle of each streamline long blade 1 is 100 degrees, the outlet shunting short blades 2 are the same as the streamline long blades 1 in number and are sixteen, the length of each outlet shunting short blade 2 is half of that of the streamline long blade 1, the outlet shunting short blades 2 are evenly distributed and welded in the middle of an outlet flow channel of the streamline long blades, the semi-open type front disc 4 is in an arc line shape and is welded on a forward-inclined inlet section 11 of the streamline long blade 1, and the shaft sleeve 5 is positioned in the middle of the semi-open type front disc 4.
The inlet diameter of the streamline long blade 1 is 181mm, the inlet diameter of the outlet shunting short blade 2 is 400mm, the inlet diameter of the semi-open front disc 4 is 174mm, the outlet diameter of the semi-open front disc 4 is 340mm, the outlet width of the streamline long blade 1 is 14mm, and the inlet width of the streamline long blade 1 is 34 mm; the width of the outlet splitter stub 2 is 14 mm.
The forward inclined inlet section 11 is connected with the semi-open front disk 4 and the impeller rear disk 3 and is closed, and the oblique line type middle section 12 and the slightly backward inclined outlet section 13 are only connected with the impeller rear disk 3 and are open.
The inlet angle of the outlet shunting short blade 2 is 59 degrees, and the outlet angle is 100 degrees.
The working principle of the invention is as follows: the front inclined inlet section 11 is connected with the semi-open type front disc 4 and the impeller rear disc 3 and is closed, the oblique line type middle section 12 and the micro-backward inclined outlet section 13 are only connected with the impeller rear disc 3 and are open, the open and closed structures form a semi-open structure of the impeller, the problem of high manufacturing and processing difficulty can be solved, the inlet section of the streamline long blade 1 is forward inclined, the outlet is micro-backward inclined, the flow field characteristic of a fan flow channel can be improved, the efficiency of the fan is improved, the aerodynamic noise is reduced, the outlet shunting short blade 2 is arranged in the middle of the outlet flow channel of the streamline long blade 1, the grid distance of the blades is reduced, the consistency is increased, the jet-wake structure is broken, the pressure of the fan is improved, the aerodynamic performance of the fan is improved, the front disc and the blades can be fully welded, the operation strength performance of the fan.
After the technical scheme is adopted, the invention has the beneficial effects that: the flow field characteristic of a fan flow channel can be improved, the fan efficiency is improved, and the aerodynamic noise is reduced; the outlet shunting short blade is arranged in the middle of the outlet flow channel of the long blade, so that the grid pitch of the blades is reduced, the pressure of the fan is improved, and the pneumatic performance of the fan is improved; the impeller is semi-open type, can solve the problem that the manufacturing and processing difficulty is big, and the welding of front disc and blade all can the full weld, improves fan operation intensity performance, ensures operation safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic of a two-dimensional structure of the present invention;
FIG. 2 is a three-dimensional view of the present invention
Fig. 3 is a schematic structural view of a streamlined long blade 1 of the present invention.
Description of reference numerals: the device comprises a streamline long blade 1, a forward-inclined inlet section 11, an oblique line type middle section 12, a slightly backward-inclined outlet section 13, an outlet shunting short blade 2, an impeller rear disc 3, a semi-open front disc 4 and a shaft sleeve 5.
Detailed Description
Referring to fig. 1-3, the technical solution adopted by the present embodiment is that it includes a streamline long blade 1, an outlet shunt short blade 2, an impeller rear disk 3, a semi-open front disk 4, and a shaft sleeve 5, where the streamline long blade 1 is blade-shaped, the inlet section is forward-inclined, the middle section is oblique, the outlet end is slightly backward-inclined, the streamline long blades 1 are evenly distributed and welded on the impeller rear disk 3, the number of the outlet shunt short blades 2 is sixteen, which is the same as that of the streamline long blades 1, the outlet shunt short blades 2 are evenly distributed and welded in the middle of the outlet flow channel of the streamline long blade 1, the outlet shunt short blades 2 and the streamline long blades 1 are staggered, the inlet section of the streamline long blade 1 is arranged in the middle of the semi-open front disk 4 and the impeller rear disk 3, which is connected with the semi-open front disk 4 and the impeller rear disk 3, and is closed, the middle section and the outlet section of the streamline long blade 1 are only connected with the impeller back plate 3 and are open. The open and closed configurations form a semi-open configuration of the impeller. The impeller is a disk on which moving blades are mounted, is a component of an impulse turbine rotor, and may also be a generic term for a disk and a rotating blade mounted thereon. The impeller can be classified according to shape and switching and closing condition, and semi-open impeller generally has two kinds of structures: the impeller is low in efficiency and needs to be provided with a sealing ring with an adjustable gap for improving the efficiency; the other is a rear half-open type, which consists of a front cover plate and blades, and because a sealing ring which is the same as the closed impeller can be applied, the efficiency is basically the same as that of the closed impeller, and the blades have the sealing function (of back blades or auxiliary impellers) besides conveying liquid. The semi-open impeller is adapted to transport liquids containing suspensions of solid particles, fibres and the like. The semi-open impeller has the advantages of low manufacturing difficulty, low cost and strong adaptability, is gradually applied to centrifugal pumps for oil refining and chemical industry, and is used for conveying clean water and liquid similar to the clean water. The problem of high manufacturing difficulty can be solved. The surface of the impeller is coated with an anti-abrasion coating mesh, and the main anti-abrasion coatings comprise resin anti-corrosion wear-resistant coatings, rubber anti-corrosion wear-resistant coatings, quartz water glass, ceramic anti-corrosion wear-resistant materials and the like, so that the surface quality of the fan impeller can be improved. The semi-open type front disc 4 is welded on the inlet section of the streamline long blade 1, and the shaft sleeve 5 is positioned in the middle of the semi-open type front disc 4. The shaft sleeve 5 is a cylindrical mechanical part sleeved on the rotating shaft and is a component of a sliding bearing. Typically, the sleeve 5 is an interference fit with the bearing housing and a clearance fit with the shaft. The semi-open type front disc 4 is of an arc line type, and the flow field characteristic of the inlet of the fan can be improved. The effective outlet diameter of the fan wheel is 670mm and the height of the fan wheel is 40 mm. The specifications of the streamline long blade 1, the outlet shunting short blade 2, the impeller rear disc 3, the semi-open type front disc 4 and other parts are proper, the maximum effect of the fan impeller can be exerted, the efficiency of the fan is improved, the noise is reduced, and the pneumatic performance of the fan is improved. The inlet angle of the outlet splitter short blade 2 is 59 degrees, and the outlet angle is 100 degrees. The angle is proper, the running strength performance of the fan can be improved, the running safety is ensured, the fan blade is one of the core components of the wind driven generator and accounts for about 15% -20% of the total cost of the fan, the designed quality of the fan blade is directly related to the performance and benefit of the fan, the three-section structure of the streamline long blade 1 can improve the flow field characteristic of a fan flow channel, the fan efficiency is improved, and the aerodynamic noise is reduced, the diameter of the inlet of the streamline long blade 1 is 181mm, the diameter of the inlet of the outlet shunting short blade 2 is 400mm, the diameter of the inlet of the semi-open front disk 4 is 174mm, the diameter of the outlet of the semi-open front disk 4 is 340mm, the width of the outlet of the streamline long blade 1 is 14mm, and the width of the inlet of; the width of the outlet shunting short blade 2 is 14mm, and the outlet shunting short blade 2 can reduce the blade grid distance and improve the pressure of the fan.
The working principle of the invention is as follows: the semi-open type structure of the impeller can solve the problem of high manufacturing and processing difficulty, the inlet section of the streamline long blade 1 is in a forward tilting type, the outlet is in a slightly backward tilting type, the flow field characteristic of a fan flow channel can be improved, the fan efficiency is improved, the pneumatic noise is reduced, the outlet shunting short blade 2 is arranged in the middle of the outlet flow channel of the streamline long blade 1, the blade grid distance is reduced, the fan pressure is improved, a 'jet flow-wake' structure is broken, the fan pressure is improved, the pneumatic performance of the fan is improved, and the operation safety is ensured.
After the technical scheme is adopted, the invention has the beneficial effects that: the flow field characteristic of a fan flow channel can be improved, the fan efficiency is improved, and the aerodynamic noise is reduced; the outlet shunting short blade is arranged in the middle of the outlet flow channel of the long blade, so that the grid pitch of the blades is reduced, the pressure of the fan is improved, and the pneumatic performance of the fan is improved; the impeller is semi-open type, can solve the problem that the manufacturing and processing difficulty is big, and the welding of front disc and blade all can the full weld, improves fan operation intensity performance, ensures operation safety.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. Half open reposition of redundant personnel low discharge high pressure centrifugal fan impeller, its characterized in that: the novel high-efficiency energy-saving turbine comprises streamline long blades (1), forward-inclined inlet sections (11), oblique line type middle sections (12), micro backward-inclined outlet sections (13), outlet shunting short blades (2), an impeller rear disc (3), a semi-open front disc (4) and a shaft sleeve (5), wherein sixteen streamline long blades (1) are evenly distributed and welded on the impeller rear disc (3), the streamline long blades (1) are divided into three sections which are respectively a forward-inclined inlet section (11), an oblique line type middle section (12) and a micro backward-inclined outlet section (13), the inlet angle of each streamline long blade (1) is 43 degrees, the outlet angle of each streamline long blade is 100 degrees, the number of the outlet shunting short blades (2) is the same as that of the streamline long blades (1) and is sixteen, the length of each outlet shunting short blade (2) is half of that of the streamline long blades (1), the outlet shunting short blades (2) are evenly distributed and welded in the middle of an outlet flow channel of the streamline long blade (1), the semi-open front disc (4) is of an arc line type and is welded on a forward-inclined inlet section (11) of the streamline long blade (1), and the shaft sleeve (5) is positioned in the middle of the semi-open front disc (4).
2. The semi-open type flow-dividing low-flow high-pressure centrifugal fan impeller according to claim 1, characterized in that: the inlet diameter of the streamline long blade (1) is 181mm, the inlet diameter of the outlet shunting short blade (2) is 400mm, the inlet diameter of the semi-open front disc (4) is 174mm, the outlet diameter of the semi-open front disc (4) is 340mm, the outlet width of the streamline long blade (1) is 14mm, and the inlet width of the streamline long blade (1) is 34 mm; the width of the outlet shunting short blade (2) is 14 mm.
3. The semi-open type flow-dividing low-flow high-pressure centrifugal fan impeller according to claim 1, characterized in that: the forward inclined inlet section (11) is connected with the semi-open front disc (4) and the impeller rear disc (3) and is closed, and the oblique line type middle section (12) and the slightly backward inclined outlet section (13) are only connected with the impeller rear disc (3) and are open.
4. The semi-open type flow-dividing low-flow high-pressure centrifugal fan impeller according to claim 1, characterized in that: the inlet angle of the outlet shunting short blade (2) is 59 degrees, and the outlet angle is 100 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300160.2A CN111140536A (en) | 2018-11-02 | 2018-11-02 | Semi-open type shunting small-flow high-pressure centrifugal fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300160.2A CN111140536A (en) | 2018-11-02 | 2018-11-02 | Semi-open type shunting small-flow high-pressure centrifugal fan impeller |
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| Publication Number | Publication Date |
|---|---|
| CN111140536A true CN111140536A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811300160.2A Pending CN111140536A (en) | 2018-11-02 | 2018-11-02 | Semi-open type shunting small-flow high-pressure centrifugal fan impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116292394A (en) * | 2023-05-11 | 2023-06-23 | 佛山市南海九洲普惠风机有限公司 | Retroverted centrifugal impeller with long and short composite blades |
-
2018
- 2018-11-02 CN CN201811300160.2A patent/CN111140536A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116292394A (en) * | 2023-05-11 | 2023-06-23 | 佛山市南海九洲普惠风机有限公司 | Retroverted centrifugal impeller with long and short composite blades |
| CN116292394B (en) * | 2023-05-11 | 2023-07-18 | 佛山市南海九洲普惠风机有限公司 | Retroverted centrifugal impeller with long and short composite blades |
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