CN113478864B - Method for manufacturing double-curved-surface impeller - Google Patents
Method for manufacturing double-curved-surface impeller Download PDFInfo
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- CN113478864B CN113478864B CN202110749823.4A CN202110749823A CN113478864B CN 113478864 B CN113478864 B CN 113478864B CN 202110749823 A CN202110749823 A CN 202110749823A CN 113478864 B CN113478864 B CN 113478864B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003365 glass fiber Substances 0.000 claims abstract description 52
- 238000011049 filling Methods 0.000 claims abstract description 38
- 239000004744 fabric Substances 0.000 claims abstract description 35
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a method for manufacturing a hyperboloid impeller, which comprises the following steps: step 10), setting a lower die and an upper die: the surface of the lower die is the same as the upper surface of the body in shape and size, and grooves with the same shape, number and positions as the blades are formed in the surface of the lower die; step 20) cutting the glass fiber cloth into a plurality of glass fiber rags, and paving a first reinforced glass fiber rag layer on the surface of the lower die; then, filling the filling body into the groove until the groove is filled with the filling body; then, sequentially laying all filling units on the filling body and the exposed first reinforcing glass fiber chopped cloth layer until the requirement of the thickness of the hyperboloid impeller is met; and step 30) hoisting the upper die, putting the upper die on the laid lower die, and pressing and forming by weight to prepare the double-curved-surface impeller. The manufacturing method is simple and easy to operate, and the manufactured hyperboloid impeller has the advantages of reliable structure, good balance performance, light weight and stable quality, and ensures the stable operation of the stirrer.
Description
Technical Field
The invention relates to the technical field of environmental protection machinery, in particular to a manufacturing method of a hyperbolic impeller.
Background
The hyperboloid mixer is a common device for urban sewage treatment and industrial wastewater treatment processes, and as shown in fig. 1, the hyperboloid mixer is vertically installed on a working bridge in a pool, and generally comprises a motor, a speed reducer, a rack, a transmission shaft and a hyperboloid impeller, wherein the motor and the speed reducer are both installed on the upper part of the pool, a power output shaft of the motor is connected with an input shaft of the speed reducer, the power output shaft of the speed reducer is connected with the top end of the transmission shaft, the speed reducer is fixed on the rack, and the hyperboloid impeller is fixedly connected to the lower part of the transmission shaft. When the motor is started, the hyperboloid impeller rotates along with the transmission shaft. Because the operating mode is abominable and the impeller is direct great, the transmission shaft is longer, consequently, has higher requirement to hyperboloid impeller preparation, otherwise can influence the safe operation of mixer.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the manufacturing method of the hyperbolic impeller has the advantages of reliable structure, good balance performance, light weight, convenience in manufacturing, stable quality, long service life and the like, and ensures stable operation of the stirrer.
In order to solve the technical problems, the embodiment of the invention provides a method for manufacturing a hyperbolic impeller, wherein the hyperbolic impeller comprises a body, blades and a hub, the blades are positioned on the upper surface of the body, the hub is positioned at the top of the body, and the hub and the blades are respectively and fixedly connected with the body; the generatrix of the upper surface and the lower surface of the body are hyperbolic curves; the manufacturing method comprises the following steps: step 10), setting a lower die and an upper die: the surface of the lower die is the same as the upper surface of the body in shape and size, and grooves with the same shape, number and positions as the blades are formed in the surface of the lower die; the lower surface of the upper die is the same as the lower surface of the body in shape and size; step 20) cutting the glass fiber cloth into a plurality of glass fiber rags according to the number of the blades, and paving a first reinforced glass fiber rag layer on the surface of the lower die; then, filling the filling body into the groove until the groove is filled with the filling body; then, sequentially laying all filling units on the filling body and the exposed first reinforcing glass fiber chopped cloth layer until the requirement of the thickness of the hyperboloid impeller is met; the filling unit comprises a resin layer positioned below and a second reinforcing glass fiber chopped cloth layer positioned above; and step 30) hoisting the upper die, coating a release agent on the lower surface of the upper die, putting the upper die on the laid lower die, and pressing and forming by means of weight to prepare the hyperbolic impeller.
Preferably, the step 20) further comprises: and (4) coating a release agent on the surface of the lower die.
Preferably, in the step 20), the filler exceeds the groove by 1-2 mm.
Preferably, the filler is a resin.
Preferably, the first reinforcing glass fiber chopped cloth layer is 1-3 layers; no gap is left in the first reinforcing glass fiber chopped cloth layer.
Preferably, the thickness of each filling unit is 2-3 mm.
Preferably, in the step 30), the body, the blade and the hub are formed simultaneously.
Preferably, the blade is a solid body contained by a space curved surface.
Preferably, the method for manufacturing the double-curved-surface impeller further comprises the step 40): and drilling a connecting hole on the hub.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: the double-curved-surface impeller provided by the embodiment of the invention has the advantages of light weight, high strength and good balance performance, and is suitable for working condition operation of various media. The impeller in the prior art is made of carbon steel materials and stainless steel materials, has the advantages of high strength, heavy weight and poor balance performance due to the adoption of a welding structure, and is large in deformation, so that the service life of the stirrer is shortened due to the fact that a driving part bears large force. This application adopts the impeller that glass fiber cloth and resin made, has light in weight, intensity height, equilibrium performance is good, corrosion resistance is strong, with low costs, and the power that the drive unit bore is less, the performance of the life of extension mixer.
Drawings
FIG. 1 is a schematic view of a hyperboloid blender installation;
FIG. 2 is a front view of a doubly curved impeller structure made in accordance with an embodiment of the present invention;
fig. 3 is a top view of a hyperboloid impeller structure made in accordance with an embodiment of the present invention.
The figure shows that: blade 1, connecting hole 2, hub 3, body 4.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 2 and 3, the hyperbolic impeller includes a body 4, blades 1 and a hub 3, the blades 1 are located on the upper surface of the body 4, the hub 3 is located on the top of the body 4, and the hub 3 and the blades 1 are respectively fixedly connected with the body 4. The generatrices of the upper surface and the lower surface of the body 4 are hyperbolic curves. The body 4 is a hyperboloid shell with a certain thickness. The blade 1 is a solid body contained by a space curved surface. Preferably, the vane 1 is located outside 1/4 radius of the arc length of the hyperboloid body with the center line of rotation of the impeller as the center, i.e. the vane 1 is located between the center circle of 1/4 radius of the body 4 and the outer diameter of the body 4. The blade 1 is a solid body contained by a group of spatial curved surfaces. The group of space curved surfaces are respectively a working surface and a non-working surface. When the impeller rotates, the working surface of the blade 1 does work on the water body to form a stirring flow field. Preferably, the number of the blades 1 is 6-8. The circumferential surface of the hub 3 is a hyperboloid entity formed by a hyperboloid bus, and the bus is a continuation of the bus of the body 4. The upper surface and the lower surface of the hub are horizontal planes.
The method for manufacturing the hyperboloid impeller comprises the following steps of:
step 10), setting a lower die and an upper die: the surface of the lower die is the same as the upper surface of the body 4 in shape and size, and grooves the same as the blades 1 in shape, number and position are formed in the surface of the lower die; the lower surface of the upper die is the same as the lower surface of the body 4 in shape and size;
step 20) cutting the glass fiber cloth into a plurality of pieces of reinforced glass fiber cloth according to the number of the blades, and paving a first piece of reinforced glass fiber cloth on the surface of the lower die; the first reinforcing glass fiber chopped cloth layer is also laid in the groove at the same time; then, filling the filling body into the groove until the groove is filled with the filling body; then, sequentially laying all filling units on the filling body and the exposed first reinforcing glass fiber chopped cloth layer until the requirement of the thickness of the hyperboloid impeller is met; the filling unit comprises a resin layer positioned below and a second reinforcing glass fiber chopped cloth layer positioned above.
And step 30) hoisting the upper die, coating a release agent on the lower surface of the upper die, putting the upper die on the laid lower die, and pressing and forming by means of weight to prepare the hyperbolic impeller.
In the method, in the step 20), a liquid filling body is injected into the groove of the blade mould which is paved with 1-3 layers of glass fiber rags. Preferably, the filler is a resin. The forming die is beneficial to improving the strength and rigidity of the blade, is reliable in forming and high in efficiency, and ensures the product quality. If all adopt the glass fiber rag shaping in the blade recess, because the blade shape is complicated, and the blade volume is little, the difficulty of being under construction like this, produce not tight of glass fiber rag and recess easily, also can have the uncompacted phenomenon between each layer glass fiber rag simultaneously, the blade shaping degree of difficulty is very big, the inside space that produces of blade, its intensity also can descend, and can make each blade shape differ, influence the balance performance of impeller, make the mixer produce the vibration, influence the life-span of mixer. Meanwhile, the impeller generates uneven fluid during working, and the process effect is influenced.
Preferably, the step 20) further comprises: and (4) coating a release agent on the surface of the lower die. Before the first glass fiber chopped cloth layer is laid on the surface of the lower die, a release agent is coated on the surface of the lower die. This facilitates the demolding of the impeller from the lower mold after the double-curved-surface impeller is manufactured in step 30).
Preferably, in the step 20), the filler exceeds the groove by 1-2 mm. The height of the filled filler is 1-2 mm higher than that of the groove, and the purpose is as follows: firstly, when the first filling unit is laid, a part of the raised filling body flows around the blade profile along with the first filling unit, so that the connection strength of the blade 1 and the body 4 is improved. Secondly, after each layer of glass fiber rag is laid, when the glass fiber rag is pressed and formed by an upper die, the compactness and the connection performance between the root of the blade 1 and the upper surface of the body 4 and the integrity of the blade are ensured. This can ensure the integrity of the blades 1 and the body 4 and improve the service life of the impeller.
Preferably, the first reinforcing glass fiber chopped cloth layer is 1-3 layers; no gap is left in the first reinforcing glass fiber chopped cloth layer. The first reinforcing glass fiber chopped cloth layer adopts a lap joint mode, and no lap joint seam exists in the groove. The first reinforcing glass fiber cloth layer is the upper surface of the double-curved-surface impeller. For the blades with complex-shaped space curved surfaces, 1-3 layers of reinforced glass fiber rags are paved on a lower die in order to ensure the paving tightness of each layer of reinforced glass fiber rag of the blades, the shape integrity, the compactness and the superior strength performance of the blades, and no gap is reserved in the first reinforced glass fiber rag layer.
Preferably, the thickness of each filling unit is 2-3 mm. The resin layer in the filling unit is connected with the lower reinforcing glass fiber rag layer and the upper reinforcing glass fiber rag layer. The resin layer is used for soaking the reinforced glass fiber cloth, all the reinforced glass fiber cloth layers are attached together, meanwhile, the reinforced glass fiber cloth layers conform to the required shape, and the cured resin layer firmly bonds the reinforced glass fiber cloth layers together to form a stable whole.
Preferably, in said step 30), the body 4, the blade 1 and the hub 3 are formed simultaneously. The impeller with double curved surfaces is integrally formed, so that the impeller with double curved surfaces has the advantages of reliable structure, good balance performance, stable quality, long service life and the like, and the stable operation of the stirring machine is ensured.
Preferably, the method for manufacturing the double-curved-surface impeller further comprises the step 40): a coupling hole 2 is drilled in the hub 3. The upper surface and the lower surface of the hub are horizontal planes, so that the transmission shaft is convenient to mount. The hub is provided with a connecting hole 2. The attachment hole 2 is used to fit the hyperboloid impeller to the lower end of the drive shaft.
The following provides a specific method for manufacturing the hyperbolic impeller:
step 10) setting corresponding dies according to specifications of diameters of impellers with different hyperboloids, wherein the dies are an upper die and a lower die, the surface of the lower die is the same as the upper surface of the impeller in shape and size, and grooves with the same shape, number and position as those of the blades 1 are arranged on the lower die; the lower surface of the upper die is the same as the lower surface of the impeller in shape and size.
And 20) coating a release agent on the lower die, and then paving the reinforced glass fiber cloth on the die, wherein the blades are of a space curved surface, so that the shape is complex and the forming is difficult. In order to ensure that the reinforced glass fiber cloth is closely contacted with the grooves for forming the blades, annular materials are cut according to a sample plate according to the number of the blades and the shape of the hub, and the reinforced glass fiber rag is laid on a lower die according to a certain direction and sequence, so that the body, the blades and the hub are molded simultaneously. And then filling the groove with a filler. And then continuously laying all filling units on the filling body and the exposed first reinforcing glass fiber chopped cloth layer until the thickness requirement of all parts of the hyperboloid impeller is met. The filling unit comprises a resin layer positioned below and a second reinforcing glass fiber cloth layer positioned above. And (4) continuously and circularly paving the filling units according to the process requirement until the specified number of paving layers of the body and the hub is finished to reach the thickness required by design.
And step 30) hoisting the upper die, putting the upper die on the laid impeller, and pressing and forming by means of weight to ensure the compactness of each layer of the reinforced glass fiber rag and the compactness and integrity of the joint of the blade and the body.
And step 40) carrying out static balance test on the impeller on a balancing machine, and if the unbalance of the impeller exceeds a design value, carrying out balance compensation on the lower surface of the impeller body until the unbalance meets the design requirement.
And step 50), drilling the connecting hole 2 on the hub 3 by using a tool.
Step 60), polishing treatment: the surface of the impeller was polished with sandpaper.
And 70) respectively adopting different matched paints to coat the surface of the impeller according to the environment of the impeller, so as to ensure the adhesive force and the applicability of the paints.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is also intended to be covered by the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (7)
1. The manufacturing method of the hyperboloid impeller is characterized by comprising a body (4), blades (1) and a hub (3), wherein the blades (1) are located on the upper surface of the body (4), the hub (3) is located at the top of the body (4), and the hub (3) and the blades (1) are fixedly connected with the body (4) respectively; the generatrix of the upper surface and the lower surface of the body (4) are hyperboloids;
the manufacturing method comprises the following steps:
step 10), setting a lower die and an upper die: the surface of the lower die is the same as the upper surface of the body (4) in shape and size, and grooves which are the same as the blades (1) in shape, number and position are formed in the surface of the lower die; the lower surface of the upper die is the same as the lower surface of the body (4) in shape and size;
step 20) cutting the reinforced glass fiber cloth into a plurality of pieces of reinforced glass fiber cloth according to the number of the blades, and laying a first reinforced glass fiber cloth layer on the surface of the lower die, wherein the first reinforced glass fiber cloth layer is also laid in the groove at the same time; then, filling the filling body into the groove until the groove is filled with the filling body; then, sequentially laying all filling units on the filling body and the exposed first reinforcing glass fiber chopped cloth layer until the requirement of the thickness of the hyperboloid impeller is met; the filling unit comprises a resin layer positioned below and a second reinforcing glass fiber chopped cloth layer positioned above; the filler exceeds the groove by 1-2 mm; the filler is resin; a part of the raised filling body is flowed around the blade profile with the first filling unit laying;
and step 30) hoisting the upper die, coating a release agent on the lower surface of the upper die, putting the upper die on the laid lower die, and pressing and forming by means of weight to prepare the hyperbolic impeller.
2. The method of manufacturing a hyperbolic impeller according to claim 1, wherein the step 20) further includes: and (4) coating a release agent on the surface of the lower die.
3. The method for manufacturing the hyperbolic impeller of claim 1, wherein the first reinforcing glass fiber chopped cloth layer comprises 1-3 layers; no gap is left in the first reinforcing glass fiber chopped cloth layer.
4. The method for manufacturing a hyperbolic impeller according to claim 1, wherein each of the filling units has a thickness of 2 to 3 mm.
5. Method for manufacturing a hyperbolic impeller in accordance with claim 1, characterised in that in step 30) the body (4), the blades (1) and the hub (3) are formed simultaneously.
6. Method for the production of a hyperbolic impeller in accordance with claim 1, characterized in that the blades (1) are solid bodies contained by a spatial curved surface.
7. The method for manufacturing a hyperboloid impeller according to claim 1, further comprising the step 40): and drilling a connecting hole (2) on the hub (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110749823.4A CN113478864B (en) | 2021-07-02 | 2021-07-02 | Method for manufacturing double-curved-surface impeller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110749823.4A CN113478864B (en) | 2021-07-02 | 2021-07-02 | Method for manufacturing double-curved-surface impeller |
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| Publication Number | Publication Date |
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| CN113478864A CN113478864A (en) | 2021-10-08 |
| CN113478864B true CN113478864B (en) | 2022-03-11 |
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| US4031601A (en) * | 1975-02-11 | 1977-06-28 | Dayton Scale Model Company | Method of fabricating and mounting a fiberglass fan blade |
| WO2006000500A1 (en) * | 2004-06-25 | 2006-01-05 | Contitech Antriebssysteme Gmbh | Flat belt for elevator systems, comprising reinforcements |
| CN105134480A (en) * | 2014-06-05 | 2015-12-09 | 西门子公司 | A root bushing for a wind turbine rotor blade, a wind turbine rotor blade, a wind turbine and a method for manufacturing a wind turbine rotor blade for a wind turbine |
| CN106393731A (en) * | 2016-11-02 | 2017-02-15 | 上海复合材料科技有限公司 | Preparing method for composite material automobile connecting rod |
| WO2020114907A1 (en) * | 2018-12-03 | 2020-06-11 | Invent Umwelt- Und Verfahrenstechnik Ag | Hyperboloid agitator for circulating liquids, and agitating and gassing device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1397058B1 (en) * | 2009-11-23 | 2012-12-28 | Nuovo Pignone Spa | CENTRIFUGAL IMPELLER MOLD, MOLD INSERTS AND METHOD TO BUILD A CENTRIFUGAL IMPELLER |
| CN203448009U (en) * | 2013-08-13 | 2014-02-26 | 南京晨荣环保设备制造有限公司 | Hyperboloidal stirrer |
| CN105034405B (en) * | 2015-08-31 | 2017-06-27 | 江苏恒神股份有限公司 | The one-step solidification moulding device and method of T-shaped Material Stiffened Panel |
| CN109203519A (en) * | 2018-08-13 | 2019-01-15 | 江苏三强复合材料有限公司 | Siding reinforcement co-curing forming technique |
| KR102137008B1 (en) * | 2018-08-14 | 2020-07-23 | 주식회사 신우텍 | Frp impeller having reinforcing structure and making method thereof |
-
2021
- 2021-07-02 CN CN202110749823.4A patent/CN113478864B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4031601A (en) * | 1975-02-11 | 1977-06-28 | Dayton Scale Model Company | Method of fabricating and mounting a fiberglass fan blade |
| WO2006000500A1 (en) * | 2004-06-25 | 2006-01-05 | Contitech Antriebssysteme Gmbh | Flat belt for elevator systems, comprising reinforcements |
| CN105134480A (en) * | 2014-06-05 | 2015-12-09 | 西门子公司 | A root bushing for a wind turbine rotor blade, a wind turbine rotor blade, a wind turbine and a method for manufacturing a wind turbine rotor blade for a wind turbine |
| CN106393731A (en) * | 2016-11-02 | 2017-02-15 | 上海复合材料科技有限公司 | Preparing method for composite material automobile connecting rod |
| WO2020114907A1 (en) * | 2018-12-03 | 2020-06-11 | Invent Umwelt- Und Verfahrenstechnik Ag | Hyperboloid agitator for circulating liquids, and agitating and gassing device |
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| CN113478864A (en) | 2021-10-08 |
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