High-temperature-resistant plastic centrifugal pump impeller and manufacturing process thereof

Abstract

The invention relates to the technical field of centrifugal pump manufacturing, and discloses a high-temperature-resistant plastic centrifugal pump impeller and a manufacturing process thereof.The high-temperature-resistant plastic centrifugal pump impeller comprises a fixing plate, the fixing plate is made of PES materials, the bottom of the fixing plate is fixedly connected with a second water storage box and a first water storage box, and a drainage valve is arranged at the bottom of the second water storage box; a water inlet valve is arranged at the bottom of the first water storage box, a blade is fixedly connected to the upper portion of the fixing plate and made of PEEK materials, a water passing groove is formed in the lower portion of the fixing plate and penetrates through the fixing plate to be formed in the blade, a water retaining strip is fixedly connected to the upper portion of the second water storage box, and a water outlet is formed in the lower portion of the second water storage box. The water retaining strip is located in the water passing groove. According to the plastic centrifugal pump impeller, the blades are made of the PEEK material, the PEEK material has excellent mechanical performance and temperature resistance, the fixing plate and the hub are made of the PES material, and the PES material is good in thermal stability, so that the heat resistance and the structural strength of the plastic centrifugal pump impeller in a high-temperature environment are improved, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pump manufacturing, in particular to a high-temperature resistant plastic centrifugal pump impeller and a manufacturing process thereof. Background Art

[0002] A centrifugal pump is a common type of pump that uses the centrifugal force generated by the rotation of the impeller to transport liquid. During operation, the motor drives the impeller to rotate at high speed, and the liquid is thrown to the edge of the impeller under the action of centrifugal force, thereby obtaining energy. A low-pressure area is formed in the center of the impeller, so that the liquid is continuously sucked into the pump. Centrifugal pumps have the advantages of large flow, high efficiency, simple structure, and easy maintenance. They are widely used in industry, agriculture, construction, municipal administration, nuclear power and new energy, and can meet various liquid transportation needs.

[0003] The existing commonly used plastic centrifugal pumps are widely used in many industrial fields due to their light weight, low cost, strong corrosion resistance and other characteristics.

[0004] However, as the industry's requirements for pumping medium temperature increase, the stability of traditional plastic centrifugal pumps at high temperatures has become one of the key factors limiting their application. Especially in the chemical production process, when encountering high-viscosity or high-temperature liquids, ordinary plastic centrifugal pumps often cannot meet the requirements of long-term continuous operation, which not only reduces work efficiency, but may also cause safety accidents. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a high-temperature resistant plastic centrifugal pump impeller and a manufacturing process thereof, which solves the problem that the existing plastic centrifugal pump has poor stability at high temperatures, thereby reducing work efficiency and causing safety accidents.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-temperature resistant plastic centrifugal pump impeller, comprising: a fixed plate, the fixed plate is made of PES material, the bottom of the fixed plate is fixedly connected to a second water storage box and a first water storage box, the bottom of the second water storage box is provided with a drain valve, the bottom of the first water storage box is provided with a water inlet valve, the upper part of the fixed plate is fixedly connected to a blade, the blade is made of PEEK material, the lower part of the fixed plate is provided with a water groove, the water groove passes through the interior of the fixed plate and is provided on the blade, the upper part of the second water storage box is fixedly connected to a water retaining bar, and the water retaining bar is located inside the water groove.

[0007] Preferably, a hub is provided in the middle of the fixing plate, the hub protrudes from the outer wall of the fixing plate, and the hub is made of PES material.

[0008] Preferably, the outer wall of the blade is provided with reinforcing ribs, and the reinforcing ribs are made of glass fiber reinforced PP material.

[0009] Preferably, a transition layer is provided between the blades and the fixing plate, and the transition layer is made of polyvinylidene fluoride material.

[0010] A manufacturing process for a high temperature resistant plastic centrifugal pump impeller comprises the following steps: S1. Raw material preparation: prepare PEEK, PES, glass fiber reinforced PP and polyvinylidene fluoride, and then put the above materials into a dryer for drying; S2. Parts manufacturing: The dried materials are placed in the barrel of the injection molding machine, and injection molding is performed according to the shape of the hub, blades and fixed plate. Then, the reinforcing ribs are arranged on the outer wall of the blade and connected by integral injection molding of the injection molding machine; S3, transition layer setting: grinding the root of the blade with a grinding wheel, and then injection molding polyvinylidene fluoride at the root of the blade; S4, one-piece injection molding connection: the blade with polyvinylidene fluoride and the fixing plate are connected by one-piece injection molding through an injection molding machine; S5. Quality inspection and debugging: The manufactured impeller is subjected to quality inspection, including dimensional accuracy, appearance defects and material properties. The impeller is then installed on a centrifugal pump to test its operating efficiency and stability.

[0011] Preferably, in S1, the temperature of PEEK in the dryer is controlled at 150-180°C, and the drying time is controlled at 3-5 hours, the temperature of PES in the dryer is controlled at 120-140°C, and the drying time is controlled at 3-5 hours, the temperature of glass fiber reinforced PP in the dryer is controlled at 130-170°C, and the drying time is controlled at 3-5 hours, and the temperature of polyvinylidene fluoride in the dryer is controlled at 80-100°C, and the drying time is controlled at 2-3 hours.

[0012] Preferably, in S2, the melting temperature of the barrel of the injection molding machine for PEEK is controlled at 343-380°C, the melting temperature of the barrel of the injection molding machine for PES is controlled at 300-320°C, the melting temperature of the barrel of the injection molding machine for polyvinylidene fluoride is controlled at 160-180°C, the melting temperature of the barrel of the injection molding machine for glass fiber reinforced PP is controlled at 200-260°C, the injection pressure of the glass fiber reinforced PP is controlled at 60-120MPa, and the blade is injected into the interior for integrated injection molding.

[0013] Preferably, the particle size of the grinding wheel in S3 is 80-120 mesh, the motor speed is controlled at 2800-3000 rpm, the feed amount is added by 0.05-0.1 mm each time during the grinding process, the grinding pressure is controlled at 5-10N, and the roughness Ra is controlled at 3.2-6.3 μm after grinding.

[0014] Preferably, the injection pressure of the polyvinylidene fluoride injection molding in S3 is controlled at 80-120 MPa, and the pressure is maintained for 10-20 seconds after the injection molding is completed.

[0015] Preferably, in S4, the melting temperature is controlled at 200-220° C., and the injection pressure of PES is controlled at 120-150 MPa.

[0016] The present invention provides a high temperature resistant plastic centrifugal pump impeller and a manufacturing process thereof. The invention has the following beneficial effects: 1. In the present invention, the blades are made of PEEK material, which has excellent mechanical properties and temperature resistance. The fixing plate and the hub are made of PES material, which has good thermal stability and can maintain good physical properties in a wide temperature range, thereby improving the heat resistance and structural strength of the plastic centrifugal pump impeller in a high temperature environment and extending its service life.

[0017] 2. The present invention can improve the strength of the blades by providing reinforcing ribs inside the blades. The reinforcing ribs are made of glass fiber reinforced PP material, which not only reduces the dead weight but also effectively resists external impacts, thereby greatly improving the operating efficiency and safety of the pump and reducing maintenance costs.

[0018] 3. The present invention can input coolant into the first water storage box through the water inlet valve, and then flow through the blades after filling the first water storage box to absorb the waste heat generated by the blades. At the same time, it can absorb the waste heat generated inside the fixed plate and finally be discharged from the drain valve to efficiently cool the impeller, thereby solving the high temperature problem that is difficult to overcome in traditional plastic centrifugal pumps and broadening its application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A perspective view of the present invention; Figure 2 is a bottom perspective view of the present invention; Figure 3 It is a schematic diagram of the structural installation of the present invention; Figure 4 It is a schematic diagram of the bottom structure of the fixing plate of the present invention; Figure 5 It is a structural schematic diagram of the first water storage box and the second water storage box of the present invention; Figure 6 is a schematic plan view of the transition layer of the present invention; Figure 7 Schematic diagram of the manufacturing process steps of the present invention.

[0020] Among them, 1. hub; 2. blades; 3. reinforcing ribs; 4. fixing plate; 5. transition layer; 6. water inlet valve; 7. drain valve; 8. water trough; 9. water retaining bar; 10. first water storage box; 11. second water storage box. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Please see attached Figure 2 and attached Figure 4 and attached Figure 5 The embodiment of the present invention provides a high temperature resistant plastic centrifugal pump impeller, comprising: a fixed plate 4, the fixed plate 4 is made of PES material, the bottom of the fixed plate 4 is fixedly connected with a second water storage box 11 and a first water storage box 10, the bottom of the second water storage box 11 is provided with a drain valve 7, the bottom of the first water storage box 10 is provided with a water inlet valve 6, the upper part of the fixed plate 4 is fixedly connected with a blade 2, the blade 2 is made of PEEK material, the lower part of the fixed plate 4 is provided with a water groove 8, the water groove 8 passes through the fixed plate 4 and is provided inside the blade 2, the upper part of the second water storage box 11 is fixedly connected with a water retaining bar 9, and the water retaining bar 9 is located inside the water groove 8.

[0023] The fixing plate 4 can support and fix the main components of the impeller, and combine the blades 2, the hub 1, the first water storage box 10 and the second water storage box 11 into an organic whole, ensuring the stability of the impeller structure, so that the various components can work together when working, and at the same time can take away part of the heat generated by the impeller when working, and assist in realizing the heat dissipation function of the blades 2 and other parts, thereby helping to improve the stability and performance of the impeller in a high temperature environment. The fixing plate 4 is made of PES material, which can maintain good physical properties in a wide temperature range, maintain its own shape and performance stability in a high temperature environment, ensure that the overall structure of the impeller does not deform due to problems such as material softening under high temperature conditions, and ensure the normal operation of the centrifugal pump. The characteristics of this material provide the fixing plate 4 with sufficient structural strength, which can reliably support and fix the blades 2, the hub 1, the first water storage box 10 and the second water storage box 11. When the impeller is driven by the pump shaft to rotate at high speed, the various components are firmly connected, maintaining the integrity and reliability of the overall structure of the impeller, and reducing the risk of failure caused by loose components. The good corrosion resistance of the PES material makes the fixing plate 4 less susceptible to corrosion when in contact with corrosive liquids or chemicals, thereby extending the service life of the impeller, reducing maintenance costs, and ensuring long-term and stable operation of the centrifugal pump. A complete cooling circulation system is constructed by the cooperation of the second water storage box 11 and the first water storage box 10. Through this circulation mechanism, cooling water is continuously delivered to the impeller to take away heat, thereby maintaining the continuity of the entire cooling process and ensuring that the impeller can be in a suitable operating temperature range for a long time. The coolant can be input through the water inlet valve 6, and the coolant carrying heat can be output through the drain valve 7. The lower part of the fixed plate 4 is provided with a water trough 8 which passes through the fixed plate 4 and extends to the inside of the blade 2. The water inlet valve 6 is arranged at the bottom of the first water storage box 10, and the drain valve 7 is arranged at the bottom of the second water storage box 11. During operation, water is introduced into the first water storage box 10 through the water inlet valve 6, and the water can flow through the water trough 8 to take away the heat generated when the impeller is working, and then be discharged from the drain valve 7 through the second water storage box 11. This process realizes water cooling and heat dissipation, prevents the impeller from having problems such as performance degradation and material deformation due to high temperature, and ensures the stable operation of the impeller under high temperature environment. The blade 2 pushes the liquid particles to move to the outer edge, so that the liquid is thrown to the edge of the impeller under the action of centrifugal force, and a low-pressure area is formed in the center of the impeller, thereby prompting the liquid to be continuously sucked into the pump, thereby realizing the suction and discharge of the liquid, and completing the liquid transportation task. The blade 2 is made of PEEK material and its surface is specially treated to increase the friction coefficient. In the process of conveying liquid, it can effectively reduce the energy loss during operation, help improve the operating efficiency of the pump, and make more reasonable use of energy.According to different usage requirements, the type of blade material can be appropriately adjusted, such as changing to PTFE to enhance chemical inertness, or changing the hub material to PA66 to further reduce the noise level. The general outline of the impeller can also be made of metal material first, and then a layer of plastic material is coated on the outside of the impeller to improve the overall structural strength and corrosion resistance. PEEK material has excellent mechanical properties and temperature resistance. In a high temperature environment, the blade 2 can still maintain good performance, maintain high strength and stability, and ensure that the centrifugal pump can continue to work stably under high temperature conditions, avoiding problems such as insufficient strength and easy deformation due to material softening, and significantly improving the applicability of the centrifugal pump in a high temperature environment. Through the water tank 8, the coolant flows from the first water storage box 10 through the water inlet valve 6 into the water tank 8, absorbs the heat generated by the impeller during the flow process, and then is discharged from the second water storage box 11 through the drain valve 7, thereby taking away the heat, preventing the impeller from having problems such as performance degradation and material deformation due to high temperature, and ensuring the stable operation of the impeller in a high temperature environment. The water retaining strip 9 allows the coolant to fully flow through the water tank 8 , thereby fully dissipating the heat of the blade 2 .

[0024] Please see attached Figure 1 In a preferred embodiment of the present invention, a hub 1 is provided in the middle of the fixing plate 4, the hub 1 protrudes from the outer wall of the fixing plate 4, and the hub 1 is made of PES material.

[0025] The hub 1 can play the role of fixing the rotating shaft, thereby transmitting the rotational force to the impeller. The hub 1 is made of PES material, which can maintain good physical properties in a wide temperature range, maintain its own shape and performance stability in a high temperature environment, and ensure that the overall structure of the impeller does not deform due to problems such as material softening under high temperature conditions.

[0026] Please see attached Figure 1 and attached Figure 3 In a preferred embodiment of the present invention, the outer wall of the blade 2 is provided with reinforcing ribs 3, and the reinforcing ribs 3 are made of glass fiber reinforced PP material.

[0027] The reinforcing rib 3 is located on the outer wall of the blade 2, and the outer wall of the reinforcing rib 3 is flush with the outer wall of the blade 2 to reduce the obstruction to the transported material. The reinforcing rib 3 enhances the structural rigidity of the impeller as a whole. During the high-speed rotation of the impeller, it can better resist the stress caused by centrifugal force, liquid pressure, etc., reduce the deformation caused by uneven force, and ensure that the impeller maintains a stable shape and performance during long-term operation. The reinforcing rib 3 is made of glass fiber reinforced PP material. The addition of glass fiber significantly improves the mechanical properties of the PP material, making the reinforcing rib 3 have higher strength and rigidity. The glass fiber reinforced PP material has a low density. While meeting the structural strength requirements, it can effectively reduce the overall weight of the impeller. At the same time, the glass fiber reinforced PP material has a certain high temperature resistance, which can be compatible with other high temperature resistant materials in the impeller and still maintain good performance under high temperature conditions.

[0028] Please see attached Figure 6 In a preferred embodiment of the present invention, a transition layer 5 is provided between the blade 2 and the fixing plate 4, and the transition layer 5 is made of polyvinylidene fluoride material.

[0029] The transition layer 5 can form a good bonding interface between the blade 2 and the fixing plate 4, thereby effectively improving the connection strength between the blade 2 and the fixing plate 4, ensuring that the connection between the blade 2 and the fixing plate 4 is firm and reliable when the impeller is rotating at high speed, avoiding problems such as loosening and falling off. There are differences in thermal performance parameters such as the thermal expansion coefficient between PEEK and PES. In high-temperature environments or working conditions with large temperature changes, this difference may generate thermal stress at the junction of the two. The transition layer 5 is made of polyvinylidene fluoride material, which can buffer this thermal stress to a certain extent and reduce the risk of material deformation and cracking caused by thermal stress.

[0030] Please see attached Figure 7 The embodiment of the present invention provides a manufacturing process of a high temperature resistant plastic centrifugal pump impeller, comprising the following steps: S1. Raw material preparation: prepare PEEK, PES, glass fiber reinforced PP and polyvinylidene fluoride, and then put the above materials into a dryer for drying; S2. Component manufacturing: the dried materials are placed in the barrel of the injection molding machine respectively, and injection molding is performed according to the shapes of the hub 1, the blade 2 and the fixing plate 4, and then the reinforcing ribs 3 are arranged on the outer wall of the blade 2 and connected by integral injection molding through the injection molding machine; S3, transition layer setting: grinding the root of the blade 2 with a grinding wheel, and then injection molding polyvinylidene fluoride at the root of the blade 2; S4, integral injection molding connection: integrally injection molding connection is performed on the blade 2 with polyvinylidene fluoride and the fixing plate 4 by an injection molding machine; S5. Quality inspection and debugging: The manufactured impeller is subjected to quality inspection, including dimensional accuracy, appearance defects and material properties. The impeller is then installed on a centrifugal pump to test its operating efficiency and stability.

[0031] Drying PEEK, PES, glass fiber reinforced PP and polyvinylidene fluoride can prevent moisture from turning into water vapor due to high temperature during the injection molding process, resulting in defects such as bubbles and voids inside the injection molded products, thereby making the surface of the injection molded parts smoother and the structure denser, improving the appearance quality and intrinsic quality of the products. Drying can effectively remove moisture and maintain the original excellent properties of the materials, ensuring that the mechanical properties and temperature resistance of PEEK, the thermal stability of PES, the strength of glass fiber reinforced PP and the chemical stability of polyvinylidene fluoride are not affected by moisture, thereby ensuring the reliability and durability of the impeller during use. At the same time, the fluidity of the material after drying is more stable, which is convenient for accurately controlling the injection pressure, speed and other parameters during the injection molding process, so that the material can fill the mold cavity more evenly, improve the success rate of injection molding and product precision, and help to achieve a more efficient and stable production process. The one-piece injection molding connection can make the overall structure of the impeller more integrated, and the force can be distributed more evenly during operation. It avoids the stress concentration problem that may be caused by different connection methods, effectively enhances the overall mechanical properties of the impeller, and enables it to withstand greater pressure and centrifugal force. By grinding the root of blade 2 with a grinding wheel, it is possible to better infiltrate the root of blade 2 with polyvinylidene fluoride during the injection molding process, thereby improving the bonding effect between the transition layer and the root of blade 2, and ensuring the quality and reliability of the entire connection. By integrally connecting blade 2 with polyvinylidene fluoride and fixing plate 4 through an injection molding machine, the connection between materials can be made tighter, greatly improving the strength of the connection, so that the connection between blade 2 and hub 1 can be stable and reliable under harsh working conditions such as high-speed rotation of the impeller. Through quality inspection and debugging, product quality can be ensured by controlling dimensional accuracy, checking appearance defects, and inspecting material properties, optimizing product performance by improving operating efficiency and enhancing stability, and ensuring safety in use by preventing safety hazards and complying with application standards.

[0032] Please see attached Figure 7 In a preferred embodiment of the present invention, in S1, the temperature of PEEK in the dryer is controlled at 150-180°C, and the drying time is controlled at 3-5 hours, the temperature of PES in the dryer is controlled at 120-140°C, and the drying time is controlled at 3-5 hours, the temperature of glass fiber reinforced PP in the dryer is controlled at 130-170°C, and the drying time is controlled at 3-5 hours, and the temperature of polyvinylidene fluoride in the dryer is controlled at 80-100°C, and the drying time is controlled at 2-3 hours.

[0033] Through precise temperature and time, it can effectively remove moisture from PEEK, PES, glass fiber reinforced PP and polyvinylidene fluoride.

[0034] Please see attached Figure 7 In a preferred embodiment of the present invention, in S2, the melting temperature of the injection molding machine barrel of PEEK is controlled at 343-380°C, the melting temperature of the injection molding machine barrel of PES is controlled at 300-320°C, the melting temperature of the injection molding machine barrel of polyvinylidene fluoride is controlled at 160-180°C, the melting temperature of the injection molding machine barrel of glass fiber reinforced PP is controlled at 200-260°C, the injection pressure of glass fiber reinforced PP is controlled at 60-120MPa, and the blade 2 is injected into the interior for integrated injection molding.

[0035] The quality of one-piece injection molding can be improved by accurate melt temperature and injection pressure.

[0036] Please see attached Figure 7 In a preferred embodiment of the present invention, the particle size of the grinding wheel in S3 is 80-120 meshes, the motor speed is controlled at 2800-3000 rpm, the feed amount is added by 0.05-0.1 mm each time during the grinding process, the grinding pressure is controlled at 5-10N, and the roughness Ra is controlled at 3.2-6.3μm after grinding.

[0037] The formation of roughness can be ensured by limiting the parameters of the tool. The roughness Ra can be effectively increased between 3.2-6.3 μm to increase the bonding force between the root of the blade 2 and the polyvinylidene fluoride transition layer, thereby ensuring the connection quality.

[0038] Please see attached Figure 7 In a preferred embodiment of the present invention, the injection pressure of the polyvinylidene fluoride injection molding in S3 is controlled at 80-120 MPa, and the subsequent pressure is maintained for 10-20 seconds after the injection molding is completed.

[0039] This helps the polyvinylidene fluoride to fully fill the mold cavity and tightly combine with the root of the blade 2, thereby ensuring the injection molding quality of the transition layer.

[0040] Please see attached Figure 7 In a preferred embodiment of the present invention, the melt temperature is controlled at 200-220° C. and the injection pressure of PES is controlled at 120-150 MPa in S4.

[0041] This facilitates the PES material to fully flow and closely fuse with the polyvinylidene fluoride transition layer, thereby achieving a firm connection with the root of the PEEK blade 2 .

[0042] Working principle: prepare PEEK, PES, glass fiber reinforced PP and polyvinylidene fluoride, then put the above materials into the dryer for drying, then put the dried materials into the injection molding machine barrel respectively, and perform injection molding according to the shape of the hub 1, blade 2 and fixed plate 4, then arrange the reinforcing rib 3 on the outer wall of the blade 2 and connect them by injection molding machine, then grind the root of the blade 2 by a grinding wheel, then inject polyvinylidene fluoride at the root of the blade 2, then connect the blade 2 with polyvinylidene fluoride and the fixed plate 4 by injection molding machine, then perform quality inspection on the manufactured impeller, including dimensional accuracy, appearance defects and material properties, then install the impeller on the centrifugal pump to test the operating efficiency and stability of the impeller, inject coolant into the first water storage box 10 through the water inlet valve 6, then the coolant fills the first water storage box 10 and then flows through the water tank 8 to fill the blade 2 and then flows to the second water storage box 11 to complete the cycle, and the coolant carries the waste heat and is discharged from the drain valve 7.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant plastic centrifugal pump impeller, comprising: A fixed plate (4), characterized in that the fixed plate (4) is made of PES material, a second water storage box (11) and a first water storage box (10) are fixedly connected at the bottom of the fixed plate (4), a drain valve (7) is provided at the bottom of the second water storage box (11), a water inlet valve (6) is provided at the bottom of the first water storage box (10), a blade (2) is fixedly connected to the upper part of the fixed plate (4), the blade (2) is made of PEEK material, a water groove (8) is provided at the lower part of the fixed plate (4), the water groove (8) passes through the interior of the blade (2) provided on the fixed plate (4), a water retaining bar (9) is fixedly connected to the upper part of the second water storage box (11), and the water retaining bar (9) is located inside the water groove (8).

2. A high temperature resistant plastic centrifugal pump impeller according to claim 1, characterized in that: A hub (1) is provided in the middle of the fixing plate (4), the hub (1) protruding from the outer wall of the fixing plate (4), and the hub (1) is made of PES material.

3. A high temperature resistant plastic centrifugal pump impeller according to claim 1, characterized in that: The outer wall of the blade (2) is provided with a reinforcing rib (3), and the reinforcing rib (3) is made of glass fiber reinforced PP material.

4. A high temperature resistant plastic centrifugal pump impeller according to claim 1, characterized in that: A transition layer (5) is provided between the blade (2) and the fixing plate (4), and the transition layer (5) is made of polyvinylidene fluoride material.

5. A manufacturing process for a high temperature resistant plastic centrifugal pump impeller, characterized in that: The following steps are involved: S1. Raw material preparation: prepare PEEK, PES, glass fiber reinforced PP and polyvinylidene fluoride, and then put the above materials into a dryer for drying; S2, parts manufacturing: the dried materials are placed into the barrel of an injection molding machine respectively, and injection molding is performed according to the shapes of the hub (1), the blades (2) and the fixing plate (4), and then the reinforcing ribs (3) are arranged on the outer wall of the blades (2) and connected by integral injection molding through the injection molding machine; S3, transition layer setting: grinding the root of the blade (2) with a grinding wheel, and then injection molding polyvinylidene fluoride at the root of the blade (2); S4, integral injection molding connection: integrally connecting the blade (2) with polyvinylidene fluoride and the fixing plate (4) by means of an injection molding machine; S5. Quality inspection and debugging: The manufactured impeller is subjected to quality inspection, including dimensional accuracy, appearance defects and material properties. The impeller is then installed on a centrifugal pump to test its operating efficiency and stability.

6. The manufacturing process of a high temperature resistant plastic centrifugal pump impeller according to claim 5, characterized in that: In the S1, the temperature of PEEK in the dryer is controlled at 150-180°C, and the drying time is controlled at 3-5 hours. The temperature of PES in the dryer is controlled at 120-140°C, and the drying time is controlled at 3-5 hours. The temperature of the glass fiber reinforced PP in the dryer is controlled at 130-170°C, and the drying time is controlled at 3-5 hours. The temperature of the polyvinylidene fluoride in the dryer is controlled at 80-100°C, and the drying time is controlled at 2-3 hours.

7. The manufacturing process of a high temperature resistant plastic centrifugal pump impeller according to claim 5, characterized in that: In S2, the melting temperature of the barrel of the injection molding machine for PEEK is controlled at 343-380°C, the melting temperature of the barrel of the injection molding machine for PES is controlled at 300-320°C, the melting temperature of the barrel of the injection molding machine for polyvinylidene fluoride is controlled at 160-180°C, the melting temperature of the barrel of the injection molding machine for glass fiber reinforced PP is controlled at 200-260°C, and the injection pressure of the glass fiber reinforced PP is controlled at 60-120 MPa, and the PP is injected into the interior of the blade (2) for integral injection molding.

8. The manufacturing process of a high temperature resistant plastic centrifugal pump impeller according to claim 5, characterized in that: The particle size of the grinding wheel in S3 is 80-120 meshes, the motor speed is controlled at 2800-3000 rpm, the feed amount is added by 0.05-0.1 mm each time during the grinding process, the grinding pressure is controlled at 5-10N, and the roughness Ra is controlled at 3.2-6.3 μm after grinding.

9. The manufacturing process of a high temperature resistant plastic centrifugal pump impeller according to claim 5, characterized in that: The injection pressure of the polyvinylidene fluoride injection molding in S3 is controlled at 80-120 MPa, and the pressure is maintained for 10-20 seconds after the injection molding is completed.

10. The manufacturing process of a high temperature resistant plastic centrifugal pump impeller according to claim 5, characterized in that: In the S4, the melting temperature is controlled at 200-220° C., and the injection pressure of PES is controlled at 120-150 MPa.

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