CN112976612B - Preparation method of high-pressure resin transfer molding fan impeller and fan impeller - Google Patents
Preparation method of high-pressure resin transfer molding fan impeller and fan impeller Download PDFInfo
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- CN112976612B CN112976612B CN202110182279.XA CN202110182279A CN112976612B CN 112976612 B CN112976612 B CN 112976612B CN 202110182279 A CN202110182279 A CN 202110182279A CN 112976612 B CN112976612 B CN 112976612B
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- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
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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
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials 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
- F04D29/26—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
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
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- 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
- B29L2031/085—Wind turbine blades
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a preparation method of a fan impeller formed by high-pressure resin transfer molding and the fan impeller, wherein the method comprises the following steps: firstly, designing a fan impeller double-sided die; manufacturing a fan impeller preformed piece by adopting a fabric reinforced material; placing the fan impeller preformed piece into a mould and vacuumizing; adopting thermosetting resin as a raw material of a fan impeller, and preparing the raw material of the fan impeller into two components; mixing the two components in proportion, pressurizing and injecting the mixture into a cavity pump in a closed fan impeller double-sided mould; the mixture is filled in a cavity of the mold and infiltrates the fan impeller preformed piece, and is cross-linked, cured and molded; and demolding and post-treating. The invention can prepare the large-scale nonmetal fan impeller based on the combination of the thermosetting resin raw material and the brand-new reaction injection molding process, and breaks through the bottleneck that the nonmetal material can only prepare the small-scale fan impeller. The prepared fan impeller has the advantages of light weight, high strength, difficult deformation, stable quality, strong corrosion resistance, acid and alkali resistance and the like.
Description
Technical Field
The invention relates to the technical field of fan impellers, in particular to a method for preparing a fan impeller formed by high-pressure resin transfer molding and a prepared fan impeller.
Background
The fan is a machine which increases the pressure of gas and discharges the gas by means of the input mechanical energy. It is a driven fluid machine. In China, a fan is a short habit for gas compression and gas conveying machinery, and the fan generally comprises: ventilators, blowers, wind generators, and the like.
The impeller is a key component of the fan, and the mass and performance of the impeller determine the mass of the whole fan. Most of the traditional impellers are made of metal materials through casting and welding methods, the quality of the impeller is unstable, the corrosion resistance is poor, severe vibration and huge noise can be generated in the operation process, and therefore the motor is unstable in operation and low in efficiency.
In recent years, some non-metal impellers manufactured by injection molding have appeared, and the specific processing procedures are as follows: and injecting molten resin into the cavity of the mold, and taking out an injection molding product from the cavity of the mold after the molten resin injected into the cavity of the mold is cooled and solidified, so as to obtain the injection molding impeller.
However, the conventional non-metal injection molded impellers are relatively small (10kg or less), and are limited by materials and injection molding processes, so that the non-metal injection molded impellers cannot be enlarged (10kg or more).
The other process method comprises the following steps: the fan impeller is prepared by adopting a continuous fiber reinforced composite material and manually pasting. The method is carried out manually, the efficiency is low, and the manufactured product has low precision and large noise.
Disclosure of Invention
The embodiment of the application provides a method for preparing a fan impeller formed by high-pressure resin transfer molding, solves the problems of unstable quality, poor corrosion resistance, small specification, low efficiency, low precision, high noise and the like of the fan impeller prepared by methods such as casting welding, injection molding, manual pasting and the like in the prior art, and realizes the beneficial effects of difficult deformation, stable quality, strong corrosion resistance, acid and alkali resistance, large specification, high efficiency, high precision, low noise, good dynamic balance performance and the like of the fan impeller by designing a brand new processing technology.
The embodiment of the application provides a preparation method of a fan impeller formed by high-pressure resin transfer molding, which is characterized by comprising the following steps:
designing a fan impeller double-sided mold, and placing the fan impeller double-sided mold in a press;
manufacturing a fan impeller preformed piece by adopting a fabric reinforced material;
placing a fan impeller preformed piece into the fan impeller double-sided mold, closing the fan impeller double-sided mold, and vacuumizing a cavity in the fan impeller double-sided mold;
adopting thermosetting resin as a raw material of a fan impeller, and preparing the raw material of the fan impeller into A, B two components;
mixing the A, B two components in proportion, pressurizing, and injecting the mixture into a cavity pump in a closed fan impeller double-sided mold; the mixture is filled and infiltrated into the fan impeller preformed piece in the cavity of the fan impeller double-sided die, and is crosslinked, cured and molded;
and opening the fan impeller double-sided die and demolding.
And (5) carrying out post-treatment on the fan impeller product after demoulding.
Preferably, the fan impeller double-sided die comprises an upper die and a lower die which can be opened and closed, and when the upper die and the lower die are closed, a cavity matched with the shape and the specification of a fan impeller to be prepared is formed between the upper die and the lower die.
Preferably, the raw material of the fan impeller is polyurethane, and the polyurethane raw material is prepared into A, B two components, wherein the component A is polyol, and the component B is diisocyanate.
Preferably, polydicyclopentadiene is adopted as a raw material of the fan impeller, and the polydicyclopentadiene is prepared into A, B two components, wherein the component A is polydicyclopentadiene and an auxiliary agent, and the component B is a catalyst.
Preferably, the A, B two components are mixed in proportion, and the specific method for pressurizing is as follows: the A, B two components are respectively added into a mixing head according to a certain proportion, and the mixing head is pressurized, so that the A, B two components are collided and mixed uniformly.
Preferably, the step of post-treating the fan wheel product after demolding comprises:
brushing a water-based environment-friendly paint primer on the fan impeller product;
trimming the edges of the fan wheel article;
brushing a water-based environment-friendly finish paint on the fan impeller product;
heat treating the fan wheel article;
inspecting the fan impeller product after heat treatment;
and packaging the fan impeller product.
The embodiment of the present application further provides a high pressure resin transfer molding fan wheel, which is characterized in that, fan wheel includes:
the fan impeller comprises an integrally formed fan impeller main body, wherein the integrally formed fan impeller main body comprises a first side plate, a central shaft is arranged in the center of the first side plate, and blades are uniformly arranged on the first side plate;
the second side plate is fixedly connected with the blade on the integrally-formed main body;
the integrally formed fan impeller main body is of a thermosetting resin structure, and a fabric reinforcing layer is arranged in the thermosetting resin structure.
Preferably, the first side plate is a circular plate, and the center of the first side plate is cylindrical and extends to one side to form the central shaft; the second side plate is also a circular plate.
Preferably, the second side plate is fixed to the blade on the integrally formed body by gluing.
Preferably, the second side plate is a thermosetting resin side plate, and a fabric reinforcing layer is arranged in the thermosetting resin side plate.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. based on the combination of the thermosetting resin raw material and a brand new reaction injection molding process, the large-scale non-metal fan impeller can be prepared, and the bottleneck that only small-scale fan impellers can be prepared from non-metal materials is broken through.
2. Because of adopting the thermosetting resin raw material, the fan impeller has the advantages of light weight, difficult deformation, stable quality, strong corrosion resistance, acid and alkali resistance and the like.
3. The fan impeller is prepared by a brand new reaction injection molding process, the fan impeller product is integrally molded, and the fan impeller has the advantages of high efficiency, high precision and the like, and the prepared fan impeller has low noise and good dynamic balance performance.
4. The fan impeller product made of the thermosetting resin raw material is internally provided with the fabric reinforcing material, so that the strength of the fan impeller product is further improved, and the fan impeller product is not easy to deform.
Drawings
Fig. 1 is a flow chart of a method for manufacturing a fan impeller by high-pressure resin transfer molding provided in an embodiment of the present application;
FIG. 2 is a flow chart of a method for manufacturing a blower wheel by high-pressure resin transfer molding provided in example II of the present application;
fig. 3 is a three-dimensional structural view of a fan impeller provided in the third embodiment of the present application;
fig. 4 is an integrated schematic view of a side plate, an impeller and a central shaft of a fan impeller provided in the third embodiment of the present application;
fig. 5 is a schematic view of another side plate of the fan impeller provided in the third embodiment of the present application.
Detailed Description
The embodiment of the application provides a method for preparing a fan impeller formed by high-pressure resin transfer molding, and solves the problems that the fan impeller prepared by the methods of cast welding, injection molding, manual pasting and the like in the prior art is unstable in quality, poor in corrosion resistance, small in specification, low in efficiency, low in precision, large in noise and the like.
In order to solve the problem of crosstalk, the technical scheme in the embodiment of the present application has the following general idea:
the fan impeller is prepared based on a brand-new high-pressure resin transfer molding process. Designing a double-sided mold according to the shape and specification of the fan impeller, manufacturing a preformed piece by adopting a fabric reinforced material, adopting thermosetting resin as an injection raw material, and quickly curing the thermosetting resin outside the fiber preformed piece in the closed double-sided mold to form a fan impeller product.
Thermosetting resin (thermosetting resin) refers to a resin which undergoes chemical change after being heated, gradually hardens and forms, is not softened after being heated, and cannot be dissolved. After the thermosetting resin is cured, a network structure is formed due to intermolecular crosslinking, so that the thermosetting resin has the advantages of high rigidity, high hardness, high temperature resistance, high heat distortion temperature, nonflammability, strong corrosion resistance, acid and alkali resistance, and good product size and performance stability.
The thermosetting resin includes: polyurethane PU, polydicyclopentadiene PDCPD, phenolic resin, urea resin, melamine-formaldehyde resin, epoxy resin, unsaturated resin, polyimide and the like.
The High Pressure-Resin Transfer Molding (HP-RTM) process adopts a preformed piece, utilizes High Pressure to carry out counter-impact mixing on Resin and inject the Resin into a vacuum closed mold on which the preformed piece is laid in advance, and obtains a composite material product through Resin flowing mold filling, impregnation, curing and demolding. When injecting glue, resin is injected into the closed die at high pressure, so that the rapid infiltration of the fiber and the excellent product performance are ensured, and the mass, short-period and high-quality production can be realized.
Based on the raw materials and the method, the large-scale non-metal fan impeller (more than 10 kg) can be prepared, and the prepared fan impeller is not easy to deform, stable in quality, strong in corrosion resistance, acid-base resistant, high in efficiency, high in precision, small in noise and good in dynamic balance performance.
In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.
Example one
Fig. 1 is a flowchart of a method for manufacturing a high-pressure resin transfer molding fan impeller provided in an embodiment of the present application, where the method for manufacturing a high-pressure resin transfer molding fan impeller includes the following steps:
step S1: and designing a double-sided mold of the fan impeller.
According to fan wheel's shape and specification, the fan wheel double-sided mould (upper and lower mould) that the design matches, promptly: when the upper die and the lower die of the fan impeller are closed, a cavity matched with the shape and the specification of the fan impeller is formed between the upper die and the lower die. And (3) placing a double-sided mold of the fan impeller in a press.
Step S2: and (3) manufacturing a fan impeller preformed piece by adopting a fabric reinforced material.
As an alternative embodiment, the textile reinforcement is a fiber, such as: carbon fibers, chopped glass fibers, and the like.
The manufacturing process of the fan impeller preformed piece is as follows:
s21: fixing a winding drum of the fiber fabric on a rotating shaft of an automatic cutting machine, inputting a preformed cutting pattern into the automatic cutting machine, and optimally arranging the cutting pattern; and (3) unfolding the fiber fabric winding drum, starting the cutting machine, automatically cutting the preformed body laying layer pattern, and sucking the cut fiber laying layer by using a sucking disc of the mechanical arm.
S22: and transferring the cut fiber fabric to a pre-setting agent spraying device, starting the spraying device to uniformly spray the pre-setting adhesive on the surface of the fiber fabric, and moving the fiber fabric during spraying so as to uniformly spray the pre-setting agent on the surface of the fiber fabric.
S23: and transferring the fiber fabric coated with the fiber pre-shaping agent to a fabric laminating device, sequentially positioning and laminating the fiber fabric according to the designed fan impeller fiber laminating structure, and flatly paving the fiber fabric on a fabric laminating conveyor belt.
S24: and transferring the superposed fiber fabric to fiber preforming equipment by utilizing fabric superposing and conveying equipment, and shaping the fiber reinforcement under the heat and pressure action of the fiber preforming equipment.
S25: and transferring the fiber reinforcement body subjected to preheating and pre-pressing shaping into a preforming body cutting mold, covering the fiber reinforcement body by using a cutting sample mold, cutting the cut-off knife along the edge of the sample mold by using a mechanical arm according to the cutting sample mold, cutting off redundant fibers, and obtaining a fan impeller preforming body corresponding to the size of an injection mold cavity of the fan impeller double-sided mold.
Step S3: the injection raw material adopts polyurethane, the polyurethane raw material is prepared into two components of polyol and diisocynate, stock solutions of the two components are respectively stored in two containers, the containers are pressure containers, the temperature in each container is 25-38 ℃, the pressure in each container is 0.15-0.28 MPa, and the containers are filled with N 2 The viscosity and the appropriate reactivity of the raw material in the container are maintained at 1.5 pas or less.
Step S4: and (3) putting the fan impeller preformed piece into a fan impeller double-sided die of a press, closing the upper die and the lower die of the fan impeller, and locking the upper die and the lower die of the fan impeller by using a locking mechanism. And vacuumizing the injection mold cavities in the upper mold and the lower mold of the fan impeller under the condition of ensuring that the injection mold cavities are always sealed.
Step S5: under the action of a high-pressure metering pump, the polyol and the diisocyan in the two reservoirs enter a mixing head of an injection machine according to the proportion of 1:1, and are subjected to high-pressure collision mixing in the mixing head, wherein the pressure in the mixing head is up to 10-20Mpa, and the high-pressure collision can generate a strong turbulent flow so as to realize the optimal mixing effect. And quickly injecting the uniformly mixed resin mixture into a high-temperature fan impeller mold cavity. The mixture is filled and infiltrated into the fan impeller preformed piece in the fan impeller mold cavity, and is rapidly solidified under the action of high temperature and high pressure.
Step S6: and opening the fan impeller mold and demolding.
Step S7: and (4) carrying out post-treatment on the fan impeller product after demoulding, including finishing, painting, heat treatment, packaging and the like. The heat treatment has two functions: the first is supplementary curing, and the second is baking after painting, so as to form a firm protective film or decorative film on the surface of the product. And after further finishing and packaging, obtaining a final fan impeller product.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
1. based on the combination of polyurethane raw materials and a brand-new high-pressure resin transfer molding process, the large-scale non-metal fan impeller can be prepared, and the bottleneck that only small-scale fan impellers can be prepared from non-metal materials is broken through.
2. Because of adopting polyurethane raw materials, the fan impeller has the advantages of light weight, difficult deformation, stable quality, strong corrosion resistance, acid and alkali resistance and the like.
3. The fan impeller is prepared by adopting a brand-new high-pressure resin transfer molding process, the fan impeller product is integrally molded, and the fan impeller has the advantages of high efficiency, high precision and the like, and the prepared fan impeller has low noise and good dynamic balance performance.
4. The fan impeller product made of polyurethane raw materials is internally provided with the fabric reinforcing material, so that the strength of the fan impeller product is further improved, and the fan impeller product is not easy to deform.
Example two
Fig. 2 is a flowchart of a method for manufacturing a high-pressure resin transfer molding fan impeller provided in an embodiment of the present application, where the method for manufacturing a high-pressure resin transfer molding fan impeller includes the following steps:
step S1: and designing a double-sided mold of the fan impeller.
According to fan wheel's shape and specification, the fan wheel double-sided mould (upper and lower mould) that the design matches, promptly: when the upper die and the lower die of the fan impeller are closed, a cavity matched with the shape and the specification of the fan impeller is formed between the upper die and the lower die. And (3) placing a double-sided mold of the fan impeller in a press.
Step S2: and (3) manufacturing a fan impeller preformed piece by adopting a fabric reinforced material.
As an alternative embodiment, the textile reinforcement is a fiber, such as: carbon fibers, chopped glass fibers, and the like.
The manufacturing process of the fan impeller preformed piece is as follows:
s21: fixing a winding drum of the fiber fabric on a rotating shaft of an automatic cutting machine, inputting a preformed cutting pattern for automatic cutting, and optimally arranging the cutting pattern; and (3) unfolding the fiber fabric winding drum, starting a cutting machine, automatically cutting the preformed body laying layer pattern, and sucking up the cut fiber laying layer by using a sucking disc of a mechanical arm.
S22: and transferring the cut fiber fabric to a pre-setting agent spraying device, starting the spraying device to uniformly spray the pre-setting adhesive on the surface of the fiber fabric, and moving the fiber fabric during spraying so as to uniformly spray the pre-setting agent on the surface of the fiber fabric.
S23: and transferring the fiber fabric coated with the fiber pre-shaping agent to a fabric laminating device, sequentially positioning and laminating the fiber fabric according to the designed fan impeller fiber laminating structure, and flatly paving the fiber fabric on a fabric laminating conveyor belt.
S24: and transferring the superposed fiber fabric to fiber preforming equipment by utilizing fabric superposing and conveying equipment, and shaping the fiber reinforcement under the heat and pressure action of the fiber preforming equipment.
S25: and transferring the fiber reinforcement subjected to preheating and pre-pressing shaping into a preforming body cutting mold, covering the fiber reinforcement by using a cutting sample mold, cutting the edge of the sample mold by using a cutting knife by using a mechanical arm according to the cutting sample mold, cutting off redundant fibers, and obtaining a fan impeller preformed piece corresponding to the size of an injection mold cavity of the fan impeller double-sided mold.
Step S3: the injection raw material adopts polydicyclopentadiene, and the polydicyclopentadiene raw material is prepared into two components, wherein the first component is high-purity polydicyclopentadiene and an auxiliary agent, and the second component is a catalyst; the two groups of raw materials are respectively stored in two containers.
Step S4: and (3) putting the fan impeller preformed piece into a fan impeller double-sided die of a press, closing the upper die and the lower die of the fan impeller, and locking the upper die and the lower die of the fan impeller by using a locking mechanism. And vacuumizing the injection mold cavities in the upper mold and the lower mold of the fan impeller under the condition of ensuring that the injection mold cavities are always sealed.
Step S5: under the action of a high-pressure metering pump, the two components in the two reservoirs enter a mixing head of an injection machine according to the ratio of 30-50: 1, and are subjected to high-pressure collision mixing in the mixing head, wherein the pressure in the mixing head is as high as 10-30 Mpa, and the high-pressure collision can generate a strong turbulent flow so as to realize the optimal mixing effect. And quickly injecting the uniformly mixed resin mixture into a high-temperature fan impeller mold cavity. The mixture is filled and infiltrated into the fan impeller preformed piece in the fan impeller mold cavity, and is rapidly solidified under the action of high temperature and high pressure.
Step S6: and opening the fan impeller mold and demolding.
Step S7: and (3) carrying out post-treatment on the fan impeller product after demoulding, wherein the post-treatment comprises water-based environment-friendly paint primer, finishing, water-based environment-friendly finish, heat treatment, inspection, packaging and the like, and the steps are shown in figure 3. The heat treatment has two functions: the first is supplementary curing, and the second is baking after painting, so as to form a firm protective film or decorative film on the surface of the product. And further finishing and packaging to obtain a final fan impeller product.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
1. based on the combination of polydicyclopentadiene raw material and brand-new high-pressure resin transfer molding process, the large-scale non-metal fan impeller can be prepared, and the bottleneck that only small-scale fan impellers can be prepared from non-metal materials is broken through.
2. Because of adopting polydicyclopentadiene as raw material, the fan impeller has the advantages of light weight, difficult deformation, stable quality, strong corrosion resistance, acid and alkali resistance and the like.
3. The fan impeller is prepared by adopting a brand-new high-pressure resin transfer molding process, the fan impeller product is integrally molded, and the fan impeller has the advantages of high efficiency, high precision and the like, and the prepared fan impeller has low noise and good dynamic balance performance.
4. The fan impeller product made of polyurethane raw materials is internally provided with the fabric reinforcing material, so that the strength of the fan impeller product is further improved, and the fan impeller product is not easy to deform.
EXAMPLE III
Fig. 3 is a schematic structural diagram of the fan impeller provided in this embodiment, and the fan impeller includes a first side plate 1, blades 2, a central shaft 3, and a second side plate 4. Wherein, first curb plate 1, blade 2, center pin 3 are integrated into one piece structure, and this integrated into one piece structure and second curb plate 4 sticky fixed form final fan wheel.
Specifically, the first side plate 1 is a circular plate, the center of the circular plate is cylindrical and extends to one side to form a central shaft 3, the plurality of blades 2 are uniformly arranged on the circular plate, and the first side plate 1, the blades 2 and the central shaft 3 are integrally formed, as shown in fig. 4, the integrally formed structure is manufactured by the method of the first embodiment/the second embodiment. The fan impeller double-sided die designed in the first embodiment/the second embodiment is matched with the integrated forming structure.
Namely: the integrated structure is formed by thermosetting resin through a high-pressure resin transfer molding process in an integrated mode, and a fabric reinforcing layer is arranged in the integrated structure.
As an alternative embodiment, the fabric reinforcing layer is a fibrous layer, such as: carbon fiber layers, chopped glass fiber layers, and the like.
As shown in fig. 5, the second side plate 4 is also a circular plate, and the second side plate 4 is fixed to the other side of each blade 2 in the integrally molded structure by glue.
The material of the second side plate 4 is the same as the material of the integrally molded structure.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
1. except one side plate, other parts of the fan impeller are integrally formed, so that the number of parts is reduced, the production efficiency is improved, and the production line investment is reduced;
2. the large-size fan impeller can be prepared, the diameter of the fan impeller can reach 70 meters, multi-component splicing is not needed, and the structure can be designed at will.
3. The fan impeller product is light in weight, not easy to deform, stable in quality, free of bubble pinholes, smooth in back, free of a release agent, strong in corrosion resistance and acid and alkali resistance.
4. The fan impeller product main body is made of thermosetting resin, and the fabric reinforcing layer is arranged in the thermosetting resin, so that the strength of the fan impeller is further improved.
It should be understood that the terms of orientation of up, down, left, right, front, back, top, bottom, etc., referred to or may be referred to in this specification, are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed accordingly depending on the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
While the foregoing is directed to the preferred embodiment of the present application, and not to the limiting thereof in any way and any way, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Those skilled in the art can make various changes, modifications and equivalent arrangements to those skilled in the art without departing from the spirit and scope of the present application; moreover, any equivalent alterations, modifications and variations of the above-described embodiments according to the spirit and techniques of this application are intended to be within the scope of the claims of this application.
Claims (7)
1. A preparation method of a fan impeller formed by high-pressure resin transfer molding is characterized by comprising the following steps:
designing a fan impeller double-sided mold, and placing the fan impeller double-sided mold in a press;
manufacturing a fan impeller preformed piece by adopting a fabric reinforced material; the manufacturing process of the fan impeller preformed piece is as follows:
fixing a winding drum of the fiber fabric on a rotating shaft of an automatic cutting machine, inputting a preformed cutting pattern into the automatic cutting machine, and optimally arranging the cutting pattern; unfolding a fiber fabric winding drum, starting a cutting machine, automatically cutting the preformed body laying pattern, and sucking up the cut fiber laying layer by using a sucker of a mechanical arm;
transferring the cut fiber fabric to a pre-setting agent spraying device, starting the spraying device to uniformly spray the pre-setting adhesive on the surface of the fiber fabric, and moving the fiber fabric during spraying so that the pre-setting agent is uniformly sprayed on the surface of the fiber fabric;
transferring the fiber fabric coated with the fiber pre-setting agent to a fabric laminating device, sequentially positioning and laminating the fiber fabric according to a designed fan impeller fiber laminating structure, and flatly paving the fiber fabric on a fabric laminating conveyor belt;
transferring the superposed fiber fabric to fiber preforming equipment by utilizing fabric superposing and conveying equipment, and shaping the fiber reinforcement under the heat and pressure action of the fiber preforming equipment;
transferring the fiber reinforcement body subjected to preheating prepressing shaping into a preforming body cutting mold, covering the fiber reinforcement body by using a cutting sample mold, cutting the fiber reinforcement body by using a cutter along the edge of the sample mold by using a mechanical arm according to the cutting sample mold, cutting off redundant fibers, and obtaining a fan impeller preformed piece corresponding to the size of an injection mold cavity of a fan impeller double-sided mold;
placing a fan impeller preformed piece into the fan impeller double-sided mold, closing the fan impeller double-sided mold, and vacuumizing a cavity in the fan impeller double-sided mold;
adopting thermosetting resin as a raw material of a fan impeller, and preparing the raw material of the fan impeller into A, B two components;
mixing the A, B two components according to a certain proportion, pressurizing and injecting the mixture into the closed double-sided mold cavity of the fan impeller; the mixture is filled and infiltrated into the fan impeller preformed piece in the cavity of the fan impeller double-sided mould, and is cross-linked, cured and molded;
opening the fan impeller double-sided mold, and demolding;
post-treating the demoulded fan impeller product;
the A, B two components are mixed according to a proportion, and the specific method for pressurizing comprises the following steps: the A, B two components are respectively added into a mixing head according to a certain proportion, and the mixing head is pressurized to ensure that the A, B two components are evenly mixed in a colliding way;
the fan impeller is made of polyurethane, and the polyurethane is prepared into A, B two components, wherein the component A is polyol, and the component B is diisocyanate; or
The impeller is prepared from polydicyclopentadiene as a raw material, and the polydicyclopentadiene is prepared into A, B two components, wherein the component A is polydicyclopentadiene and an auxiliary agent, and the component B is a catalyst.
2. The method for preparing a fan impeller by high-pressure resin transfer molding according to claim 1, wherein the fan impeller double-sided mold comprises an upper mold and a lower mold which can be opened and closed, and when the upper mold and the lower mold are closed, a cavity matched with the shape and the specification of the fan impeller to be prepared is formed between the upper mold and the lower mold.
3. The method of claim 1, wherein the post-treating step of the demolded fan wheel product comprises:
brushing a water-based environment-friendly paint primer on the fan impeller product;
trimming the edges of the fan wheel article;
brushing water-based environment-friendly finish paint on the fan impeller product;
heat treating the fan wheel article;
inspecting the heat-treated fan impeller product;
and packaging the fan impeller product.
4. A high-pressure resin transfer molding fan impeller, which is prepared by the method for preparing a high-pressure resin transfer molding fan impeller according to any one of claims 1 to 3, and which comprises:
the fan impeller comprises an integrally formed fan impeller main body, wherein the integrally formed fan impeller main body comprises a first side plate, a central shaft is arranged in the center of the first side plate, and blades are uniformly arranged on the first side plate;
the second side plate is fixedly connected with the blade on the integrally-formed main body;
the integrally formed fan impeller main body is of a thermosetting resin structure, and a fabric reinforcing layer is arranged in the thermosetting resin structure.
5. The fan impeller formed by high-pressure resin transfer molding according to claim 4, wherein the first side plate is a circular plate, and the center of the first side plate extends in a cylindrical shape to one side to form the central shaft; the second side plate is also a circular plate.
6. The blower wheel of claim 4, wherein the second side plate is adhesively secured to the blades on the integrally formed body.
7. The blower wheel of claim 4 wherein said second side plate is a thermoset side plate with a fabric reinforcement layer disposed therein.
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| CN114311753A (en) * | 2021-12-31 | 2022-04-12 | 江苏金风科技有限公司 | Resin composite material, preparation method, blade shell and wind generating set |
| CN114316550A (en) * | 2022-01-29 | 2022-04-12 | 清华大学 | Resin and preparation method thereof |
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| CN1880052A (en) * | 2006-03-09 | 2006-12-20 | 张世忠 | Die pressing plastic and steel fan impeller production process and special mould |
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| CN1880052A (en) * | 2006-03-09 | 2006-12-20 | 张世忠 | Die pressing plastic and steel fan impeller production process and special mould |
| CN104981338A (en) * | 2012-12-18 | 2015-10-14 | Lmwp专利控股有限公司 | A wind turbine blade comprising an aerodynamic blade shell with recess and pre-manufactured spar cap |
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Application publication date: 20210618 Assignee: Zhuhai Dongjie Technology Co.,Ltd. Assignor: SHANGHAI DONGJIE POLYMER MATERIAL Co.,Ltd. Contract record no.: X2022980018178 Denomination of invention: A preparation method of high pressure resin transfer molding fan impeller and fan impeller Granted publication date: 20220906 License type: Common License Record date: 20221017 |