A manufacturing process for a scroll liquid pump rotor

Abstract

The application discloses a manufacturing process of a scroll liquid pump rotor, which comprises the following steps: S1, lower mold processing, S2, upper mold and primary injection shell assembling, S3, positioning ring installation, S4, metal body processing and forming, S5, engineering plastic layer primary injection forming and S6, engineering plastic layer secondary injection forming. The manufacturing process of the application adopts the upper mold and the primary injection shell, which can realize the secondary injection forming of the engineering plastic layer on the rotor, control the deformation of the engineering plastic layer, facilitate the demolding of the engineering plastic layer, improve the bonding strength between the engineering plastic layer and the metal body, improve the installation stability and reliability of the whole rotor, and prolong the service life of the rotor.

Description

Technical Field

[0001] This invention relates to the field of liquid pump technology, and in particular to a manufacturing process for a scroll liquid pump rotor. Background Technology

[0002] Data centers bear increasingly complex task processing burdens, and the growing application load puts immense pressure on them. Traditional data centers consist of multiple separate computing resources contained within a shell structure. Data centers, or other physical spaces, benefit from adequate and optimized power and cooling infrastructure. Maintaining data centers at the required temperature helps prevent computer hardware (such as IT infrastructure) from overheating and malfunctioning. Therefore, many data centers are cooled to relatively low temperatures to improve equipment reliability and lifespan, and to avoid downtime for repairs and / or replacements.

[0003] Data center cooling systems handle the heat dissipation pressure that is difficult to release from data centers. Cooling towers use water as a circulating coolant to lower the temperature of the data center. Cooling towers can cool the data center and release waste heat into the atmosphere.

[0004] In the field of refrigerant delivery, positive displacement pumps, rotary pumps, or centrifugal pumps are traditionally used. During operation, these conventional pumping devices experience wear on moving parts, causing metal powder to flake off and potentially burning out the motor. Furthermore, conventional pumps require lubricating oil or other lubricants for operation. However, in data center cooling systems, these lubricants pose a risk of flowing into the system through cooling channels. Therefore, data center cooling systems operate in an oil-free environment; the wear and tear on the internal friction pairs of the unlubricated pumping equipment negatively impacts the cooling system's efficiency and lifespan.

[0005] In the prior art, when the rotor of a liquid pump is injection molded, an engineering plastic layer is generally formed by a one-time injection molding process. Common engineering plastic injection layers shrink after cooling and are prone to deformation. At the same time, due to defects in structural design, the engineering plastic layer is prone to falling off, affecting the processing quality and service life of the rotor, and thus affecting the service life of the liquid pump during operation. Summary of the Invention

[0006] The purpose of this invention is to provide a technical solution for manufacturing a vortex pump rotor to address the shortcomings of existing technologies. This manufacturing process uses an upper mold and a one-time injection molded housing, which not only enables secondary injection molding of the engineering plastic layer on the rotor and controls the deformation of the engineering plastic layer, but also facilitates the demolding of the engineering plastic layer, improves the bonding strength between the engineering plastic layer and the metal body, enhances the installation stability and reliability of the entire rotor, and extends its service life.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A manufacturing process for a vortex liquid pump rotor, characterized by comprising the following steps:

[0009] S1, Lower mold processing

[0010] a. First, make the corresponding lower mold according to the design requirements, and process the limiting block along the placement cavity of the lower mold so that the limiting block and the lower mold form a limiting groove. The side of the placement cavity facing upward has an opening.

[0011] b. Then, grooves are evenly opened along the outer circumference edge of the top surface of the lower mold, and the dimensions of each groove are equal;

[0012] c. Next, evenly install the second ear plate along the outer circumference of the lower mold;

[0013] S2. Assembly of upper mold and primary injection molded shell.

[0014] a. First, determine the size of the upper mold according to the size of the positioning ring, and process the corresponding splicing units. Open arc-shaped cavities from the bottom to the top of each splicing unit. At the same time, install injection tubes along the top of the splicing units so that the injection tubes connect the cavities. Then, fix two adjacent splicing units together with the second fastener to form an upper mold with a ring structure. The cavities are connected to form a secondary injection cavity.

[0015] b. Then, according to the size of the secondary injection cavity and the design size of the rotor, the corresponding primary injection shell is processed. The primary injection shell is formed by splicing at least two injection units. The primary injection shell has a primary injection cavity. The primary injection shell is installed on the secondary injection cavity through a fixing mechanism and attached to the bottom surface of the upper mold.

[0016] S3, Positioning Ring Installation

[0017] Select a suitable positioning ring according to the design dimensions of the upper mold, install the first ear plate that matches the second ear plate along the outer circumference side of the positioning ring, and install the positioning ring into the threaded hole on the outer side of the splicing unit through fastening screws.

[0018] S4. Metal body processing and forming

[0019] The dimensions of the metal body are determined according to the design requirements of the rotor. The required turntable, sleeve and scroll bar are formed by integral casting. The sleeve is located at the center of the turntable. A stop block is integrally formed inside the sleeve. The scroll bar is located on the side of the turntable near the sleeve and forms an Archimedean spiral structure with the sleeve as the center. The other side of the turntable is provided with bearing holes. The scroll bar is provided with at least one drainage hole on the side near the sleeve. Grooves are opened on both the scroll bar and the turntable.

[0020] S5, Engineering plastic layer, one-time injection molding

[0021] a. First, place the processed metal body into the placement cavity of the lower mold, with the side with the bearing hole facing down and assemble it into the limiting groove for limiting.

[0022] b. Then, the upper mold is placed above the lower mold and cooperates with the positioning mechanism. The first ear plate and the second ear plate are fixedly connected by the first bolt, so that the positioning ring is located directly above the lower mold. The first ear plate, the second ear plate and the first bolt form the first fastener, so as to realize the fixed assembly of the upper mold and the positioning ring.

[0023] c. Then, the molten elastomer material is injected through the injection tube between the metal body and the primary injection shell at an injection temperature of 400°C to form the first layer of engineering plastic.

[0024] d. After the first layer of engineering plastic reaches the set strength, first open the second fastener, remove one of the splicing units of the upper mold to achieve demolding, then remove the adjacent splicing units. After the last splicing unit is removed, remove the positioning ring until the first layer of engineering plastic is demolded.

[0025] S6, Engineering plastic layer secondary injection molding

[0026] a. First, remove the primary injection-molded shell from each splicing unit, then fix each splicing unit together using the second fastener, and install a positioning ring on the outside of the splicing unit.

[0027] b. Then, the upper mold is placed above the lower mold and cooperates with the positioning mechanism. The first ear plate and the second ear plate are fixedly connected by the first bolt, so that the positioning ring is located directly above the lower mold. The first ear plate, the second ear plate and the first bolt form the first fastener, so as to realize the fixed assembly of the upper mold and the positioning ring.

[0028] c. Then, the molten elastomer material is injected through the injection tube between the first engineering plastic layer and the inner wall of the injection monomer at an injection temperature of 350°C to form the second engineering plastic layer.

[0029] d. After the second engineering plastic layer reaches the set strength, first open the second fastener, remove one of the splicing units of the upper mold to achieve demolding, and then remove the adjacent splicing units until the second engineering plastic layer is demolded.

[0030] This manufacturing process uses an upper mold and a one-time injection molded shell, which not only enables secondary injection molding of the engineering plastic layer on the rotor and controls the deformation of the engineering plastic layer, but also facilitates the demolding of the engineering plastic layer, improves the bonding strength between the engineering plastic layer and the metal body, enhances the installation stability and reliability of the entire rotor, and extends its service life.

[0031] Furthermore, in step S1 process c, the top surface of the second ear plate is lower than the bottom surface of the groove. This structural design not only facilitates the positioning and assembly between the upper and lower molds, but also helps to install each splicing unit in the required position, making it easier to fix the positioning ring and the splicing unit together, thus improving the quality of injection molding.

[0032] Furthermore, the second fastener in step S2 process a includes a third ear plate and a second bolt. The third ear plate is located on the top surface of the splicing unit, and the third ear plates between two adjacent splicing units are connected by the second bolt, which facilitates the fixed connection of two adjacent splicing units.

[0033] Furthermore, the injection molding unit in step S2 b includes a base plate that fits to the bottom of the upper mold and two arc-shaped first and second scroll forming covers. The first scroll forming cover, the second scroll forming cover and the base plate are integrally formed. The design of the first scroll forming cover, the second scroll forming cover and the base plate facilitates the formation of an engineering plastic layer on the surface of the rotor, thereby improving the quality of injection molding.

[0034] Furthermore, both the top of the first and second spiral forming covers are provided with injection holes, and the splicing unit is provided with an injection tube that connects to the injection holes. The injection tube can not only perform one-time injection molding of molten elastomer material through the injection holes, but also perform secondary injection molding after the first and second spiral forming covers are removed, thereby improving the processing quality of the engineering plastic layer.

[0035] Furthermore, the injection-molded units are spliced ​​together to form limiting holes, and the spliced ​​units cooperate to form positioning holes. The limiting holes and positioning holes are concentric circles, and the distance between the limiting holes and positioning holes is H, where 2mm < H < 4mm. This distance design not only facilitates the injection molding of the engineering plastic layer, but also makes it less likely to fall off, improves the adhesion strength of the engineering plastic layer, and further extends the service life of the rotor.

[0036] Furthermore, the fixing mechanism in step S2b includes a locking block and a locking groove. An arc-shaped strip is provided on the outer circumferential side of the base plate, which matches the inner wall of the placement cavity of the lower mold. The locking block is located on the outer circumferential side of the arc-shaped strip, and the top surface of the locking block is higher than the top surface of the base plate. The locking groove is distributed in a ring at the bottom of the upper mold, and the locking block matches the locking groove. The locking block is connected to the upper mold by fastening screws. The design of the arc-shaped strip facilitates the edge forming of the engineering plastic layer, improving the injection molding quality. The locking block and locking groove facilitate the connection of the primary injection molding shell to the upper mold, improving the installation stability between the primary injection molding shell and the upper mold, and further improving the injection molding quality.

[0037] Furthermore, the positioning mechanism in step S5b includes protrusions and grooves. The protrusions are distributed in a ring along the bottom edge of the upper mold, and the grooves are distributed in a ring along the top edge of the lower mold. The protrusions and grooves match each other. The design of the protrusions and grooves facilitates the installation and positioning of the upper mold, and further improves the assembly accuracy between the upper mold and the positioning ring.

[0038] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0039] 1. This manufacturing process uses an upper mold and a one-time injection molded shell, which not only enables secondary injection molding of the engineering plastic layer on the rotor and controls the deformation of the engineering plastic layer, but also facilitates the demolding of the engineering plastic layer, improves the bonding strength between the engineering plastic layer and the metal body, enhances the installation stability and reliability of the entire rotor, and extends its service life.

[0040] 2. The top surface of the second ear plate is lower than the bottom surface of the groove. This design not only facilitates the positioning and assembly between the upper and lower molds, but also helps to install each splicing unit in the required position, making it easier to fix the positioning ring and the splicing unit, thus improving the quality of injection molding.

[0041] 3. The injection tube can not only perform one-time injection molding of molten elastomer material through the injection hole, but also perform secondary injection molding after removing the first and second spiral forming covers, thereby improving the processing quality of the engineering plastic layer.

[0042] 4. The arc-shaped design facilitates edge forming of the engineering plastic layer, improving injection molding quality. The locking blocks and slots facilitate the connection of the primary injection molding shell to the upper mold, improving the installation stability between the primary injection molding shell and the upper mold, and further enhancing injection molding quality. Attached image description:

[0043] The present invention will be further described below with reference to the accompanying drawings:

[0044] Figure 1 A flowchart illustrating the manufacturing process of a vortex liquid pump rotor according to the present invention;

[0045] Figure 2 This is a schematic diagram showing the connection between the upper mold and the lower mold in this invention;

[0046] Figure 3 This is a schematic diagram showing the connection between the upper mold and the primary injection molded housing in this invention;

[0047] Figure 4 This is a schematic diagram of the upper mold in this invention;

[0048] Figure 5 This is a schematic diagram of the structure of the primary injection molded housing in this invention;

[0049] Figure 6 for Figure 5 Schematic diagram of the structure in direction A;

[0050] Figure 7 This is a schematic diagram of the lower mold in this invention;

[0051] Figure 8 This is a rendering of the rotor in this invention;

[0052] Figure 9 for Figure 8 Schematic diagram of the structure in the B direction;

[0053] Figure 10 This is a cross-sectional view of the rotor in this invention.

[0054] In the diagram: 1-Upper mold; 101-Positioning hole; 102-Secondary injection cavity; 103-Bump; 104-Threaded hole; 105-Slot; 106-Assembly unit;

[0055] 2-Lower mold; 201-Placement cavity; 202-Limiting block; 203-Limiting groove; 204-Groove;

[0056] 3-Injection molded tubing;

[0057] 4-First fastener; 401-First ear plate; 402-Second ear plate; 403-First bolt;

[0058] 5- Primary injection molded housing; 501- Injection molded unit; 502- Base plate; 503- First spiral strip forming cover; 504- Second spiral strip forming cover; 505- Injection hole; 506- Limiting hole; 507- Arc strip; 508- Locking block; 509- Primary injection cavity;

[0059] 6-Rotor; 601-Turntable; 602-Scroll bar; 603-Sleeve; 604-Stop; 605-Drainage hole; 610-Bearing hole; 612-Metal body; 613-Engineering plastic layer; 614-Groove;

[0060] 7-Second fastener; 701-Third ear plate; 702-Second bolt;

[0061] 8-Locking ring; 9-Fasting screw. Detailed Implementation

[0062] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0063] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0064] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0065] The vortex liquid pump rotor of the present invention is as follows Figures 8 to 10 As shown, the rotor 6 specifically includes a turntable 601, a spiral bar 602 fixed to the same side of the turntable 601, and a sleeve 603. The sleeve 603 is located at the center of the turntable 601, and a stop block 604 is provided inside the sleeve 603. The turntable 601 has a bearing hole 610. The rotor 6 has a drainage hole 605, through which high-pressure liquid can be drained to achieve force balance of the rotor 6.

[0066] The rotor 6 includes a metal body 612 and an engineering plastic layer 613. The metal body 612 has a groove 614 on the side near the spiral bar 602. The engineering plastic layer 613 is connected to the metal body 612 through the groove 614. The thickness of the engineering plastic layer 613 is 2-4mm. The metal body 612 is preferably made of aluminum alloy. At the same time, the engineering plastic layer 613 is not installed on the sleeve 603, which helps to improve the installation stability of the engineering plastic layer 613 and makes it less likely to fall off.

[0067] The engineering plastic layer 613 is made of elastomer material, which can be rubber, polyetheretherketone (PEEK), etc., preferably PEEK. This material is non-conductive and has good affinity. Even if it wears down, it will not damage the motor. At the same time, it can run dry. In the cooling system, the refrigerant is easy to evaporate and produce gas. The gas will exist in the dry running, which can meet the requirements of dry running.

[0068] like Figures 1 to 7 The diagram illustrates a manufacturing process for a vortex-driven liquid pump rotor according to the present invention, comprising the following steps:

[0069] S1, Lower mold 2 processing

[0070] a. First, make the corresponding lower mold 2 according to the design requirements. Process the limiting block 202 in the placement cavity 201 of the lower mold 2 so that the limiting block 202 and the lower mold 2 form a limiting groove 203. The shape of the limiting groove 203 is the same as the shape of the side of the metal body 612 near the bearing hole 610, which facilitates the stable placement of the metal body 612. The side of the placement cavity 201 facing upward has an opening, which facilitates the cooperation between the upper mold 1 and the lower mold 2.

[0071] b. Then, three grooves 204 are evenly opened along the outer circumference edge of the top surface of the lower mold 2. The size of each groove 204 is equal, which facilitates positioning with each splicing unit 106 and improves the speed of mold assembly.

[0072] c. Next, four second ear plates 402 are evenly installed along the outer circumference of the lower mold 2. The top surface of the second ear plate 402 is lower than the bottom surface of the groove 204. This structure design not only facilitates the positioning and assembly between the upper mold 1 and the lower mold 2, but also facilitates the installation of each splicing unit 106 in the required position, making it easier to fix the positioning ring 8 and the splicing unit 106, thereby improving the quality of injection molding.

[0073] S2, upper mold 1 and primary injection molded shell 5 assembly

[0074] a. First, determine the size of the upper mold 1 according to the size of the positioning ring 8, and process the corresponding splicing unit 106. Open an arc-shaped cavity from the bottom to the top of each splicing unit 106. At the same time, install the injection tube 3 along the top of the splicing unit 106 so that the injection tube 3 connects to the cavity. Then, fix two adjacent splicing units 106 together with the second fastener 7 to form an annular upper mold 1. The cavities are connected to form a secondary injection cavity 102. The second fastener 7 includes a third ear plate 701 and a second bolt 702. The third ear plate 701 is set on the top surface of the splicing unit 106. The third ear plates 701 between two adjacent splicing units 106 are connected by the second bolt 702 to facilitate the fixed connection of two adjacent splicing units 106.

[0075] b. Then, according to the size of the secondary injection cavity 102 and the design size of the rotor 6, the corresponding primary injection shell 5 is processed. The primary injection shell 5 is formed by splicing at least two injection units 501. The primary injection shell 5 has a primary injection cavity 509. The primary injection shell 5 is installed on the secondary injection cavity 102 by a fixing mechanism and attached to the bottom surface of the upper mold 1.

[0076] The injection molding unit 501 includes a base plate 502 that fits into the bottom of the upper mold 1 and two arc-shaped first scroll bar 602 forming covers 503 and second scroll bar 602 forming covers 504. The first scroll bar 602 forming covers 503, second scroll bar 602 forming covers 504 and base plate 502 are integrally formed. The design of the first scroll bar 602 forming covers 503, second scroll bar 602 forming covers 504 and base plate 502 facilitates the formation of an engineering plastic layer 613 on the surface of the rotor 6, thereby improving the quality of injection molding.

[0077] The top of the first spiral bar 602 forming cover 503 and the second spiral bar 602 forming cover 504 are both provided with injection holes 505. The splicing unit 106 is provided with an injection tube 3, which is connected to the injection hole 505. The injection tube 3 can not only perform one injection molding of molten elastomer material through the injection hole 505, but also perform a second injection molding after the first spiral bar 602 forming cover 503 and the second spiral bar 602 forming cover 504 are removed, thereby improving the processing quality of the engineering plastic layer 613.

[0078] The injection molding units 501 are spliced ​​together to form a limiting hole 506, and the splicing units 106 are fitted together to form a positioning hole 101. The limiting hole 506 and the positioning hole 101 are concentric circles. The distance between the limiting hole 506 and the positioning hole 101 is H, 2mm < H < 4mm. This distance design not only facilitates the injection molding of the engineering plastic layer 613, but also makes it less likely to fall off, improves the bonding strength of the engineering plastic layer 613, and further extends the service life of the rotor 6.

[0079] The fixing mechanism includes a locking block 508 and a locking groove 105. An arc-shaped strip 507 is provided on the outer circumferential side of the base plate 502. The arc-shaped strip 507 matches the inner wall of the placement cavity 201 of the lower mold 2. The locking block 508 is located on the outer circumferential side of the arc-shaped strip 507. The top surface of the locking block 508 is higher than the top surface of the base plate 502. The locking groove 105 is distributed in a ring at the bottom of the upper mold 1. The locking block 508 matches the locking groove 105. The locking block 508 is connected to the upper mold 1 by fastening screws 9. The design of the arc-shaped strip 507 facilitates the edge forming of the engineering plastic layer 613, improving the injection molding quality. The locking block 508 and the locking groove 105 facilitate the connection of the primary injection molding shell 5 to the upper mold 1, improving the installation stability between the primary injection molding shell 5 and the upper mold 1, and further improving the injection molding quality.

[0080] S3, Positioning Ring 8 Installation

[0081] Select a suitable positioning ring 8 according to the design dimensions of the upper mold 1, install the first ear plate 401 that matches the second ear plate 402 along the outer circumferential side of the positioning ring 8, and install the positioning ring 8 into the threaded hole 104 on the outer side of the splicing unit 106 by fastening screws 9.

[0082] S4, Metal body 612 machining and forming

[0083] The dimensions of the metal body 612 are determined according to the design requirements of the rotor 6. The required turntable 601, sleeve 603 and spiral bar 602 are formed by integral casting. The sleeve 603 is located at the center of the turntable 601. A stop block 604 is integrally formed inside the sleeve 603. The spiral bar 602 is located on the side of the turntable 601 near the sleeve 603 and forms an Archimedean spiral structure with the sleeve 603 as the center. The other side of the turntable 601 is provided with a bearing hole 610. The spiral bar 602 is provided with at least one drainage hole 605 on the side near the sleeve 603. Grooves 614 are opened on both the spiral bar 602 and the turntable 601.

[0084] S5, engineering plastic layer 613, one-time injection molding

[0085] a. First, place the processed metal body 612 into the placement cavity 201 of the lower mold 2, and assemble it into the limiting groove 203 with the side with the bearing hole 610 facing down for limiting.

[0086] b. Then, the upper mold 1 is placed above the lower mold 2 and engaged by a positioning mechanism. The first ear plate 401 and the second ear plate 402 are fixedly connected by the first bolt 403, so that the positioning ring 8 is located directly above the lower mold 2. The first ear plate 401, the second ear plate 402 and the first bolt 403 form the first fastener 4, realizing the fixed assembly of the upper mold 1 and the positioning ring 8. The positioning mechanism includes a protrusion 103 and a groove 204. The protrusion 103 is distributed in a ring along the bottom edge of the upper mold 1, and the groove 204 is distributed in a ring along the top edge of the lower mold 2. The protrusion 103 and the groove 204 match. The design of the protrusion 103 and the groove 204 facilitates the installation and positioning of the upper mold 1, and further improves the assembly accuracy between the upper mold 1 and the positioning ring 8.

[0087] c. Then, the molten elastomer material is injected through the injection tube 3 between the metal body 612 and the primary injection shell 5 at an injection temperature of 400°C to form the first engineering plastic layer 613.

[0088] d. After the first layer of engineering plastics 613 reaches the set strength, first open the second fastener 7, remove one of the splicing units 106 of the upper mold 1 to achieve demolding, then remove the adjacent splicing units 106, and after the last splicing unit 106 is removed, remove the positioning ring 8 until the first layer of engineering plastics 613 is demolded.

[0089] S6, Engineering Plastic Layer 613, Secondary Injection Molding

[0090] a. First, remove the primary injection-molded housing 5 from each splicing unit 106, then fix each splicing unit 106 together with the second fastener 7, and install the positioning ring 8 on the outside of the splicing unit 106.

[0091] b. Then, the upper mold 1 is placed above the lower mold 2 and cooperates with it through the positioning mechanism. The first ear plate 401 and the second ear plate 402 are fixedly connected by the first bolt 403, so that the positioning ring 8 is located directly above the lower mold 2. The first ear plate 401, the second ear plate 402 and the first bolt 403 form the first fastener 4, so as to realize the fixed assembly of the upper mold 1 and the positioning ring 8.

[0092] c. Then, the molten elastomer material is injected through the injection tube 3 between the first engineering plastic layer 613 and the inner wall of the injection monomer 501, with an injection temperature of 350°C, to form the second engineering plastic layer 613.

[0093] d. After the second engineering plastic layer 613 reaches the set strength, first open the second fastener 7, remove one of the splicing units 106 of the upper mold 1 to achieve demolding, and then remove the adjacent splicing units 106 until the second engineering plastic layer 613 is demolded.

[0094] This manufacturing process uses an upper mold 1 and a primary injection-molded housing 5, which not only enables secondary injection molding of the engineering plastic layer 613 on the rotor 6 and controls the deformation of the engineering plastic layer 613, but also facilitates the demolding of the engineering plastic layer 613, improves the bonding strength between the engineering plastic layer 613 and the metal body 612, enhances the installation stability and reliability of the entire rotor 6, and extends its service life.

[0095] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to achieve substantially the same technical effect are all covered within the protection scope of the present invention.

Claims

1. A manufacturing process for a vortex hydraulic pump rotor, characterized in that... Includes the following steps: S1, Lower mold processing a. First, make the corresponding lower mold according to the design requirements, and process the limiting block along the placement cavity of the lower mold so that the limiting block and the lower mold form a limiting groove. The side of the placement cavity facing upward has an opening. b. Then, grooves are evenly opened along the outer circumference edge of the top surface of the lower mold, and the dimensions of each groove are equal; c. Next, evenly install the second ear plate along the outer circumference of the lower mold; S2. Assembly of upper mold and primary injection molded shell. a. First, determine the size of the upper mold based on the size of the lower mold, and process the corresponding splicing units. Open arc-shaped cavities from the bottom to the top of each splicing unit. At the same time, install injection tubes along the top of the splicing units so that the injection tubes connect the cavities. Then, fix two adjacent splicing units together with a second fastener to form an upper mold with a ring structure. The cavities are connected to form a secondary injection cavity. b. Then, according to the size of the secondary injection cavity and the design size of the rotor, the corresponding primary injection shell is processed. The primary injection shell is formed by splicing at least two injection units. The primary injection shell has a primary injection cavity. The primary injection shell is installed on the secondary injection cavity through a fixing mechanism and attached to the bottom surface of the upper mold. S3, Positioning Ring Installation Select a suitable positioning ring according to the design dimensions of the upper mold, install the first ear plate that matches the second ear plate along the outer circumference side of the positioning ring, and install the positioning ring into the threaded hole on the outer side of the splicing unit through fastening screws. S4, Metal body processing and forming The dimensions of the metal body are determined according to the design requirements of the rotor. The required turntable, sleeve and scroll bar are formed by integral casting. The sleeve is located at the center of the turntable. A stop block is integrally formed inside the sleeve. The scroll bar is located on the side of the turntable near the sleeve and forms an Archimedean spiral structure with the sleeve as the center. The other side of the turntable is provided with a bearing hole. The scroll bar is provided with at least one drainage hole on the side near the sleeve. Grooves are opened on both the scroll bar and the turntable. S5, Engineering plastic layer, one-time injection molding a. First, place the processed metal body into the placement cavity of the lower mold, with the side with the bearing hole facing down and assemble it into the limiting groove for limiting. b. Then, the upper mold is placed above the lower mold and cooperates with the positioning mechanism. The first ear plate and the second ear plate are fixedly connected by the first bolt, so that the positioning ring is located directly above the lower mold. The first ear plate, the second ear plate and the first bolt form the first fastener, so as to realize the fixed assembly of the upper mold and the positioning ring. c. Then, the molten elastomer material is injected through the injection tube between the metal body and the primary injection shell at an injection temperature of 400°C to form the first layer of engineering plastic. d. After the first layer of engineering plastic reaches the set strength, first open the second fastener, remove one of the splicing units of the upper mold to achieve demolding, then remove the adjacent splicing units. After the last splicing unit is removed, remove the positioning ring until the first layer of engineering plastic is demolded. S6, Engineering plastic layer secondary injection molding a. First, remove the primary injection-molded shell from each splicing unit, then fix each splicing unit together using the second fastener, and install a positioning ring on the outside of the splicing unit. b. Then, the upper mold is placed above the lower mold and cooperates with the positioning mechanism. The first ear plate and the second ear plate are fixedly connected by the first bolt, so that the positioning ring is located directly above the lower mold. The first ear plate, the second ear plate and the first bolt form the first fastener, so as to realize the fixed assembly of the upper mold and the positioning ring. c. Then, the molten elastomer material is injected through the injection tube between the first engineering plastic layer and the inner wall of the injection monomer at an injection temperature of 350°C to form the second engineering plastic layer. d. After the second engineering plastic layer reaches the set strength, first open the second fastener, remove one of the splicing units of the upper mold to achieve demolding, and then remove the adjacent splicing units until the second engineering plastic layer is demolded.

2. The manufacturing process of a vortex hydraulic pump rotor according to claim 1, characterized in that: In step S1, the top surface of the second ear plate is lower than the bottom surface of the groove.

3. The manufacturing process of a vortex hydraulic pump rotor according to claim 1, characterized in that: The second fastener in step S2 process a includes a third ear plate and a second bolt. The third ear plate is disposed on the top surface of the splicing unit, and the third ear plates between two adjacent splicing units are connected by the second bolt, which facilitates the fixed connection of the two adjacent splicing units.

4. The manufacturing process of a vortex hydraulic pump rotor according to claim 1, characterized in that: The injection molding unit in step S2 b includes a base plate that fits to the bottom of the upper mold and two arc-shaped first scroll forming covers and second scroll forming covers, which are integrally formed with the base plate.

5. The manufacturing process of a vortex hydraulic pump rotor according to claim 4, characterized in that: Both the first spiral forming cover and the second spiral forming cover are provided with injection holes at their tops, and the splicing unit is provided with the injection tube, which is connected to the injection hole.

6. The manufacturing process of a vortex hydraulic pump rotor according to claim 4, characterized in that: The injection-molded units are spliced ​​together to form a limiting hole, and the spliced ​​units cooperate to form a positioning hole. The limiting hole and the positioning hole are concentric circles, and the distance between the limiting hole and the positioning hole is H, where 2mm < H < 4mm.

7. The manufacturing process of a vortex hydraulic pump rotor according to claim 4, characterized in that: The fixing mechanism in step S2b includes a locking block and a locking groove. An arc-shaped strip is provided on the outer circumferential side of the base plate. The arc-shaped strip matches the inner wall of the placement cavity of the lower mold. The locking block is provided on the outer circumferential side of the arc-shaped strip. The top surface of the locking block is higher than the top surface of the base plate. The locking groove is distributed in a ring at the bottom of the upper mold. The locking block matches the locking groove. The locking block is connected to the upper mold by fastening screws.

8. The manufacturing process of a vortex hydraulic pump rotor according to claim 1, characterized in that: The positioning mechanism in step S5b includes a protrusion and a groove. The protrusion is distributed in a ring along the bottom edge of the upper mold, and the groove is distributed in a ring along the top edge of the lower mold. The protrusion matches the groove.

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