A diffuser assembly integral casting mold and method

Abstract

This invention belongs to the field of diffusers and discloses an integral casting mold and method for diffuser components. The mold includes a base, on which a rotatable faceplate, a base, and a cover plate are sequentially arranged. The faceplate has a first fixed trajectory hole, a second fixed trajectory hole, several sliders with guide rails, and guide pins. Several tenon and groove components are arranged at the top of the base, with outer and inner ring block components within each tenon and groove component. A sliding connecting rod is provided at the bottom of some tenon and groove components, with one end of the sliding connecting rod passing through the first and second fixed trajectory holes and connecting to the base. A pad, a pouring pipe, and a blade block fixing seat are arranged on the base. Several blade-shaped movable blocks are arranged on the blade block fixing seat. A mold surface fixing component is arranged on the cover plate, with several first guide rods at the bottom of the mold surface fixing component. One end of each first guide rod is located in a first guide rod hole inclinedly opened on the first inner ring block. This invention effectively solves the problems of low manufacturing efficiency and low accuracy and quality of wax models in current diffuser casting processes.

Description

Technical Field

[0001] This invention belongs to the field of diffusers and relates to an integral casting mold and method for diffuser components. Background Technology

[0002] As a key component of the engine, the diffuser plays a vital role in the overall engine. It can decelerate and pressurize the high-speed airflow at the compressor outlet, reduce the total pressure loss in the combustion chamber, stabilize combustion, and improve engine efficiency. It is a key focus in actual research and development. Such parts often have characteristics such as thin walls, poor rigidity, complex structure, high dimensional accuracy, and large processing deformation. Therefore, they are mostly made using precision casting technology.

[0003] The existing integral casting method is only suitable for simple diffusers with a small number of blades. It mainly involves casting individual blades, inner / outer rings, and support plates separately and then bonding them together to form a complete wax model. However, for diffusers with nearly a hundred blades and more complex structures, the separate casting and bonding method is obviously unsuitable. This is mainly because the bonding work is extensive, the process is complex, the losses are high, the production efficiency is low, the decomposition surface of the bonded parts of the wax model assembly is obvious, and the precision is not high. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integral casting mold and method for diffuser components.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] In a first aspect, the present invention provides an integral casting mold for a diffuser assembly, comprising a base; a rotatable face plate, a base, and a cover plate are sequentially arranged on the base; the face plate has two rows of first fixed trajectory holes and second fixed trajectory holes arranged radially in opposite directions; the face plate is provided with a plurality of guide rail sliders and a plurality of guide pins cooperating with the inclined guide rails of the guide rail sliders; a face plate drive assembly connected to the face plate and used to drive the face plate to rotate is provided on the side of the base; a plurality of first tenon and groove assemblies are provided on the outer side of the top of the base, and a plurality of second tenon and groove assemblies and a plurality of third tenon and groove assemblies are arranged at intervals on the inner side; an outer ring block assembly is provided at the top of the first tenon and groove assembly, a first inner ring block is provided at the top of the second tenon and groove assembly, and a second inner ring block is provided at the top of the third tenon and groove assembly; the first tenon and groove assembly and the third tenon and groove assembly... Each component has a sliding connecting rod at its bottom. One end of the sliding connecting rod of the first tenon and the third tenon components passes through the first fixed trajectory hole and the second fixed trajectory hole, respectively, and connects to the base. A pad, a casting pipe, and a blade block fixing seat are provided on the base. The pad is located above several guide rail sliders. The casting pipe passes through the pad and connects to the casting groove on the blade block fixing seat. Several blade blocks are provided on the blade block fixing seat. The side of the blade blocks is in contact with the surface of the outer ring block component, the first inner ring block, and the second inner ring block. A profile fixing component is provided on the cover plate, which is in contact with the top of the blade blocks, the outer ring block component, the first inner ring block, and the second inner ring block. Several first guide rods are provided at the bottom of the profile fixing component, and one end of the first guide rod is located in the first guide rod hole opened at an inclination on the first inner ring block.

[0007] Optionally, the flower plate has several intermittently arranged annular grooves, and a stop block is set in the annular groove, with one end of the stop block fixedly connected to the base.

[0008] Optionally, the flower disc drive assembly includes a worm bearing; a worm is disposed inside the worm bearing, a rack is sleeved on one end of the worm to mesh with a gear on the side of the flower disc, and a handle is disposed on the other end of the worm.

[0009] Optionally, the disc drive assembly further includes a housing; the housing is fitted over the worm bearing and the worm.

[0010] Optionally, the first mortise and tenon assembly includes a first mortise and tenon; an outer ring block sliding tenon and a first pressing block for limiting the outer ring block sliding tenon are provided in the first mortise and tenon, and the outer ring block sliding tenon cooperates with the mortise and tenon groove on the bottom surface of the outer ring block assembly; the second mortise and tenon assembly includes a second mortise and tenon; a first inner ring block sliding tenon and a second pressing block for limiting the first inner ring block sliding tenon are provided in the second mortise and tenon, and the first inner ring block sliding tenon cooperates with the mortise and tenon groove on the bottom surface of the first inner ring block; the third mortise and tenon assembly includes a third mortise and tenon; a second inner ring block sliding tenon and a third pressing block for limiting the second inner ring block sliding tenon are provided in the third mortise and tenon, and the second inner ring block sliding tenon cooperates with the mortise and tenon groove on the bottom surface of the second inner ring block.

[0011] Optionally, a plurality of connecting rod bearings are provided on the base, and the connecting rod bearings are connected to the sliding connecting rod.

[0012] Optionally, the blade-shaped movable block includes a blade-shaped block on the outer side of the blade basin, a blade-shaped block on the inner side of the blade basin, a blade-shaped block on the outer side of the blade back, and a blade-shaped block on the inner side of the blade back, which are connected in sequence; the blade-shaped block on the outer side of the blade basin, the blade-shaped block on the inner side of the blade basin, the blade-shaped block on the outer side of the blade back, and the blade-shaped block on the inner side of the blade back correspond to the blade basin and blade back profiles on the air intake side and the blade basin and blade back profiles on the exhaust side of the diffuser blade, respectively.

[0013] Optionally, the profile fixing assembly includes a pressure plate, an outer profile fixing block, several connecting blocks, a connecting rod, and several second guide rods; the outer profile fixing block is connected to the cover plate through the connecting rods; the pressure plate is fixed through the inner ring groove of the outer profile fixing block, which plays a pressing role on the leaf-shaped movable block; the connecting block is connected to the first guide rod; the second guide rod is fitted with a bolt bushing, one end of which passes through the outer profile fixing block and is connected to the base.

[0014] Optionally, the base is provided with several lifting rings; the base is provided with several guide cones for guidance.

[0015] In a second aspect, the present invention provides a method for integral casting of a diffuser assembly based on the aforementioned integral casting mold for a diffuser assembly, comprising: connecting a wax injection machine to the inlet of a pouring pipe, initiating pouring until pouring is completed and then disconnecting the pouring; lifting a cover plate, wherein a first guide rod fixed on the cover plate moves a first inner ring block toward the center of the mold until the first guide rod moves away from the first inner ring block and stops sliding, thereby removing the first inner ring block from the wax mold and removing the cover plate; driving a flower disc to rotate via a flower disc drive assembly, and driving a sliding connecting rod on the flower disc to rotate... The second inner ring block and the outer ring block assembly move radially away from the diffuser assembly wax mold along the flower disc to open the mold. When the outer ring block assembly, the first inner ring block, and the second inner ring block slide to a state where the diffuser assembly wax mold can be removed without interference, all blade-shaped movable blocks are removed and the flower disc continues to rotate, causing the guide pin to enter the guide rail slider. The guide rail slider is driven to move upward along the mold axis, causing the bottom surface of the inner / outer ring of the wax mold to be subjected to force and move upward to disengage from the blade-shaped movable block fixing seat, thus removing the diffuser assembly wax mold.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention relates to an integral casting mold for diffuser components. By designing a combination of an outer ring block assembly, a first inner ring block, a second inner ring block, and a blade-shaped movable block, it meets the surface requirements for integral casting. Simultaneously, it utilizes a faceplate and sliding tenon connection structure for mechanical mold opening, and a slider connection structure with guide rails for mechanical wax model removal. This enables zero-margin precision casting of thin-walled, multi-bladed diffusers. Both mold opening and removal are mechanized, significantly improving the processing accuracy and production efficiency of the diffuser. Actual verification shows an efficiency increase of over 90%, reducing the need for individual wax model casting and wax model assembly for nearly a hundred diffuser blades. Each product saves 5-7 days of production time and effectively improves diffuser product quality. It avoids cumulative dimensional errors caused by numerous bonded wax modules, increases the overall casting pass rate of the diffuser, and reduces product damage and scrap caused by numerous bonded wax model processes and manual manufacturing. This effectively solves the problems of low manufacturing efficiency and poor wax model accuracy and quality in current on-site diffuser casting processes involving manual bonding of wax modules. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of the cavity configuration of the integral casting mold for the diffuser assembly according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the leaf-shaped movable block structure according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the installation of the leaf-shaped movable block and the assembly of the sliding tenon according to an embodiment of the present invention.

[0021] Figure 4 This is a cross-sectional view of the base installation according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the installation of the flower plate and base according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the surface fixing component and cover plate according to an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the overall casting mold structure of the diffuser assembly according to an embodiment of the present invention.

[0025] Figure 8 Embodiments of the present invention Figure 7 Enlarged schematic diagram at point I.

[0026] Wherein: 1-Outer ring block assembly; 2-Inner ring block assembly; 201-First inner ring block; 202-Second inner ring block; 3-Pressure plate; 4-Blade block fixing seat; 5-Padded block; 6-Slider with guide rail; 7-Blade movable block; 701-Outer blade block of blade basin; 702-Inner blade block of blade basin; 703-Outer blade block of blade back; 704-Inner blade block of blade back; 8-Base; 901-Outer ring block sliding tenon; 902-First inner ring block sliding tenon; 101-First pressure block; 102 11-Second pressure block; 12-Pouring pipe; 13-Guide cone; 14-Outer shell; 15-Dish; 16-Base; 17-Bearing; 18-Bolt sleeve; 19-Stop block; 20-Guide pin; 21-Rack; 22-Worm gear; 23-Worm gear bearing; 24-Handle; 25-Cover plate; 26-Inner fixing block; 27-First guide rod; 28-Connecting block; 29-Connecting rod; 30-Outer fixing block; 31-Second guide rod; 32-Sliding connecting rod; 33-Connecting rod bearing. Detailed Implementation

[0027] 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 of the present invention. 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.

[0028] 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. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings:

[0030] See Figures 1 to 8 In one embodiment of the present invention, an integral casting mold for a diffuser assembly is provided, which realizes the integral precision casting of a thin-walled multi-bladed diffuser without any allowance. The mold opening and demolding are both mechanized, which greatly improves the processing accuracy and production efficiency of the diffuser.

[0031] Specifically, the integral casting mold of the diffuser assembly includes a base 15; a rotatable flower plate 14, a base 8 and a cover plate 25 are sequentially arranged on the base 15.

[0032] The flower plate 14 has two rows of first fixed trajectory type holes and second fixed trajectory type holes arranged in opposite directions along the radial direction; the flower plate 14 is provided with a number of guide rail sliders 6 and a number of guide pins 19 that cooperate with the inclined guide rails of the guide rail sliders 6.

[0033] A flower plate drive assembly is provided on the side of the base 8, which is connected to the flower plate 14 and used to drive the flower plate to rotate; several first mortise and tenon assemblies are provided on the outer side of the top of the base 8, and several sets of second mortise and tenon assemblies and several third mortise and tenon assemblies are provided at intervals on the inner side; an outer ring block assembly 1 is provided on the top of the first mortise and tenon assembly, a first inner ring block 201 is provided on the top of the second mortise and tenon assembly, and a second inner ring block 202 is provided on the top of the third mortise and tenon assembly; a sliding connecting rod 32 is provided at the bottom of both the first mortise and tenon assembly and the third mortise and tenon assembly. One end of the sliding connecting rod 32 of the tenon and groove assembly passes through the first fixed trajectory hole and the second fixed trajectory hole respectively and is connected to the base 15; the base 8 is provided with a pad 5, a pouring pipe 11 and a blade block fixing seat 4; the pad 5 is located above several guide rail sliders 6; the pouring pipe 11 passes through the pad 5 and is connected to the pouring groove on the blade block fixing seat 4; several blade blocks 7 are provided on the blade block fixing seat 4; the side of the blade block 7 is in contact with the surface of the outer ring block assembly 1, the first inner ring block 201 and the second inner ring block 202.

[0034] A profile fixing component is provided on the cover plate 25 to fit the top of the blade-shaped movable block 7, the outer ring block assembly 1, the first inner ring block 201 and the second inner ring block 202; a plurality of first guide rods 27 are provided at the bottom of the profile fixing component, and one end of the first guide rod 27 is located in the first guide rod hole opened at an inclination on the first inner ring block 201.

[0035] This invention relates to an integral casting mold for diffuser components. By designing a combination of an outer ring block assembly 1, a first inner ring block 201, a second inner ring block 202, and a blade-shaped movable block 7, the mold surface requirements for integral casting are met. Simultaneously, a faceplate 14 and a sliding tenon connection structure enable mechanical mold opening, and a slider connection structure with a guide rail slider 6 completes the mechanical demolding of the wax model. This achieves zero-margin precision casting of a thin-walled, multi-bladed diffuser. Both mold opening and demolding are mechanized, significantly improving the machining accuracy and production efficiency of the diffuser. Actual verification shows that efficiency is improved by more than 90%, reducing the process of casting individual wax molds and splicing wax molds for nearly a hundred diffuser blades. Each product saves 5-7 days of production cycle and effectively improves diffuser product quality. It avoids the cumulative dimensional errors caused by a large number of glued wax modules, increases the overall casting pass rate of diffusers, and reduces product damage and scrap caused by a large number of glued wax modules and manual manufacturing processes. It effectively solves the problems of low manufacturing efficiency and low wax mold accuracy and quality in the current on-site diffuser casting process due to manual glued wax modules.

[0036] In one possible implementation, the flower plate 14 has several intermittently arranged annular grooves, and a stop block 18 is provided in the annular groove. One end of the stop block 18 is fixedly connected to the base 15.

[0037] In one possible implementation, the flower disc drive assembly includes a worm bearing 22; a worm 21 is disposed inside the worm bearing 22, a rack 20 that meshes with a gear on the side of the flower disc 14 is sleeved on one end of the worm 21, and a handle 23 is disposed on the other end of the worm 21.

[0038] Optionally, the disc drive assembly further includes a housing 13; the housing 13 is fitted over the worm bearing 22 and the worm 21.

[0039] In one possible implementation, the first mortise and tenon assembly includes a first mortise and tenon; an outer ring block sliding tenon 901 and a first pressing block 101 for limiting the outer ring block sliding tenon 901 are disposed within the first mortise and tenon, and the outer ring block sliding tenon 901 engages with the mortise and tenon groove on the bottom surface of the outer ring block assembly 1; the second mortise and tenon assembly includes a second mortise and tenon; a first inner ring block sliding tenon 902 and a second pressing block 102 for limiting the first inner ring block sliding tenon 902 are disposed within the second mortise and tenon, and the first inner ring block sliding tenon 902 engages with the mortise and tenon groove on the bottom surface of the first inner ring block 201; the third mortise and tenon assembly includes a third mortise and tenon; a second inner ring block sliding tenon and a third pressing block for limiting the second inner ring block sliding tenon are disposed within the third mortise and tenon, and the second inner ring block sliding tenon engages with the mortise and tenon groove on the bottom surface of the second inner ring block 202.

[0040] In one possible implementation, a plurality of connecting rod bearings 33 are provided on the base 15, and the connecting rod bearings 33 are connected to the sliding connecting rod 32.

[0041] In one possible implementation, the blade-shaped movable block 7 includes a blade-shaped block 701 on the outer side of the blade basin, a blade-shaped block 702 on the inner side of the blade basin, a blade-shaped block 703 on the outer side of the blade back, and a blade-shaped block 704 on the inner side of the blade back, which are connected in sequence. The blade-shaped block 701 on the outer side of the blade basin, the blade-shaped block 702 on the inner side of the blade basin, the blade-shaped block 703 on the outer side of the blade back, and the blade-shaped block 704 on the inner side of the blade back correspond to the blade basin and blade back profiles on the air intake side and the blade basin and blade back profiles on the exhaust side of the diffuser blade, respectively.

[0042] Specifically, the diffuser blade channel has a shape that is large at both ends and small in the middle, meaning the inlet and outlet ends of the blade channel are large and the middle dimension is small. This places high demands on the design of the blade profile block structure required for wax pattern casting. It must meet the precision requirements of multi-blade casting while also ensuring easy assembly and disassembly during casting. Therefore, based on the blade size and structural characteristics, a suitable blade profile block 7 is designed and assembled in each blade channel, fixed on the blade profile block fixing seat 4. Each blade profile block 7 consists of four blade profile blocks: an outer blade profile block 701 on the blade base, an inner blade profile block 702 on the blade base, an outer blade profile block 703 on the blade back, and an inner blade profile block 704 on the blade back. These correspond to the blade base and blade back profiles on the inlet side and the exhaust side of the blade, respectively. For nearly one hundred diffuser blades, nearly four hundred blade profile blocks 7 are required, and their exhaust port design ensures unobstructed exhaust and prevents wax leakage.

[0043] In one possible implementation, the profile fixing assembly includes a pressure plate 3, an outer profile fixing block 30, several connecting blocks 28, connecting rods 29, and several second guide rods 31; the outer profile fixing block 30 is connected to the cover plate 25 through the connecting rods 29; the pressure plate 3 is fixed through the inner annular groove of the outer profile fixing block 30, which presses against the leaf-shaped movable block 7; the connecting blocks 28 are connected to the first guide rod 27; the second guide rod 31 is fitted with a bolt sleeve 17, one end of which passes through the outer profile fixing block 30 and is connected to the base 15.

[0044] In one possible implementation, the base 8 is provided with several lifting rings 24 for hoisting the integral casting mold of the diffuser assembly.

[0045] In one possible implementation, the base 8 is provided with a plurality of guide cones 12 for guiding.

[0046] In one possible implementation, the base 15 is located at the bottom of the mold and supports the entire mold. The upper part of the base 15 is equipped with a flower plate 14 via a bearing 16. The flower plate 14 has two rows of fixed trajectory holes running radially and three intermittent ring grooves. The stop block 18 is installed in the intermittent ring grooves to strengthen the flower plate and is fixed to the base 15 with screws.

[0047] Three sliders with guide rails 6 are placed on the surface of the flower plate 14, and three guide pins 19 are fixed with screws. The mounting edge of the slider with guide rails 6 is inserted into the corresponding hole of the base 8 for limiting and fixing.

[0048] The base 8 is connected to the base 15 via bolt bushing 17 and second guide rod 31. The base 8 is provided with lifting ring 24 and guide cone 12 for lifting and guiding purposes, respectively. The outer shell 13 is installed on its side with screws. The outer shell 13 is equipped with worm bearing 22 to support the worm 21 with handle 23 and rack 20 mounted on it. At the same time, the base 8 has several mortise and tenon grooves. The outer ring block sliding tenon 901 is installed in the outer mortise and tenon groove 902 is installed in the inner mortise and tenon groove 902. The first pressure block 101 and the second pressure block 102 are fixed in the mortise and tenon grooves of the base 8 with screws, respectively limiting the outer ring block sliding tenon 901 and the first inner ring block sliding tenon 902.

[0049] The outer ring block sliding tenon 901 is engaged with the mortise groove on the bottom surface of the outer ring block assembly 1. The sliding connecting rod 32 is sleeved on the connecting rod bearing 33. It is inserted into the hole on the mortise groove on the bottom surface of the outer ring block assembly 1 and the shaped hole on the outer side of the surface of the flower plate 14 through the hole on the outer ring block sliding tenon 901. When the flower plate 14 rotates, the sliding connecting rod 32 drives the outer ring block assembly 1 to move radially.

[0050] The first inner ring block sliding tenon 902 is connected to the bottom tenon groove of the second inner ring block 202. The sliding connecting rod 32 is inserted into the hole on the bottom tenon groove of the second inner ring block 202 and the shaped hole on the inner side of the surface of the flower plate 14 through the hole on the first inner ring block sliding tenon 902. When the flower plate 14 rotates, the sliding connecting rod 32 drives the second short inner ring block 202 to move radially.

[0051] A pad 5 and a blade-shaped block fixing seat 4 are installed on the base 8 through an annular groove. The pouring pipe 11 passes through the pad 5 and connects to the pouring groove on the blade-shaped block fixing seat 4. The blade-shaped movable block 7 is inserted into the blade-shaped block fixing seat 4. The blade-shaped movable block 7 consists of four blocks: an outer blade-shaped block 701 on the blade basin, an inner blade-shaped block 702 on the blade basin, an outer blade-shaped block 703 on the blade back, and an inner blade-shaped block 704 on the blade back.

[0052] The side of the leaf-shaped movable block 7 is in contact with the surfaces of the outer ring block assembly 1 and the inner ring block assembly 2. The upper surface of the leaf-shaped movable block 7 is in contact with the pressure plate 3. The pressure plate 3 is fixed by the inner ring groove of the outer fixing block 30, which provides a pressing effect on the leaf-shaped movable block 7. The inner ring block assembly 2 consists of a first inner ring block 201 and a second inner ring block 202. The first inner ring block 201 is connected to the connecting block 28 through the first guide rod 27 and is mounted on the cover plate 25. The cover plate 25 is connected to the outer fixing block 30 through the connecting rod 29. The second guide rod 31 is mounted in the bolt bushing 17 and provides a guiding function for fixing and installing / disassembling the base 15, the flower disc 14, the base 8, and the cover plate 25. The inner fixing block 26 is fixedly mounted on the cover plate 25 to fix the inner ring block assembly 2.

[0053] The opening / closing mold design of the integral casting mold for the diffuser assembly of the present invention is as follows:

[0054] Utilizing the structural design of the flower plate 14, two rows of fixed trajectory holes are evenly distributed radially on the flower plate 14. The outer ring block assembly 1 and the second short inner ring block 202 are connected to the mortise groove of the base 8 through the outer ring block sliding tenon 901 and the inner ring block sliding tenon 902. Through the sliding connecting rod 32 and the connecting rod bearing 33, the rod passes through the trajectory holes of the flower plate 14, with one end inserted into the mortise groove hole on the bottom surface of the outer ring block assembly 1 and the second short inner ring block 202, and the other end inserted into the corresponding sliding tenon hole in the mortise groove of the base 8. When the flower plate 14 rotates, the rotational motion of the flower plate 14 is converted into the sliding motion of the outer ring block assembly 1 and the second inner ring block 202 in the mortise groove of the base 8. The rotation of the flower plate 14 is accomplished by the meshing motion of the worm gear 21 rotating the rack 20 with the teeth on the flower plate. When the cover plate 25 moves up and down, it drives the first guide rod 27 to complete the radial sliding motion of the first inner ring block 201. To ensure mold closing accuracy, multi-point conical surface guidance is used to ensure the installation position and accuracy of the upper mold and the base.

[0055] The mold opening / closing process of the integral casting mold for the diffuser assembly of the present invention is as follows:

[0056] First, the cover plate 25 is opened, which drives the first guide rod 27 to allow the first inner ring block 201 to slide outward radially. Then, the handle 23 is rotated, which drives the rack 20 via the worm gear 21. The rack 20 rotates and engages with the teeth on the flower plate 14, causing the flower plate 14 to rotate in the opposite direction. When the flower plate 14 rotates, the sliding connecting rod 32 placed in the flower plate hole drives the outer ring block assembly 1, the outer ring block sliding tenon 901 fixed at the bottom of the second inner ring block 202, and the inner ring block sliding tenon 902 to move linearly along the mortise groove on the base. The two rows of holes on the flower plate 14 guide the movement of the outer ring block assembly 1 through the holes located on the outer circle, and guide the movement of the second inner ring block 202 through the holes located on the inner circle. The two rows of holes are designed in opposite directions. Therefore, when the flower plate 14 rotates clockwise, the outer ring block assembly 1 and the second inner ring block 202 move away from each other, forming an open state and completing the mold opening process. When the flower plate 14 rotates counterclockwise, the outer ring block assembly 1 and the second inner ring block 202 move towards each other, forming a convergent state and completing the mold closing process.

[0057] The demolding design of the integral casting mold for the diffuser assembly of this invention is as follows:

[0058] By utilizing a slider and guide rail design, evenly distributed guide pins 19 are designed on the mold plate. When the guide pins 19 move along the side guide rail grooves of the guide rail sliders 6, they drive each guide rail slider 6 to move up and down axially. This causes the wax model above the guide rail sliders 6 to move axially along with them, thus achieving wax model demolding. To ensure the sliding position accuracy of the outer ring block assembly 1 and the inner ring block assembly 2 before demolding, in addition to controlling the material selection and machining accuracy of each component of the mold, the design of the stop block 18 is emphasized to strengthen the support strength of the mold plate 14 and the rotational flexibility of the mold plate 14.

[0059] The demolding process of the integral casting mold for the diffuser assembly of the present invention is as follows:

[0060] First, remove the blade-shaped movable block 7 used for casting the blade shape. Then, rotate the handle 23 clockwise to rotate the flower disc 14, causing the outer ring block assembly 1 and the inner ring block assembly 2 to separate, completing the mold opening process. After the outer ring block assembly 1 and the inner ring block assembly 2 stop moving, continue rotating the flower disc 14 in the same direction. Each guide pin 19 fixed on the flower disc 14 enters the side guide rail groove of the guide rail slider 6 and moves towards the bottom along the guide rail groove. This forces the corresponding guide rail slider 6 placed on the flower disc 14, together with the pad block 5 fixed on it, to move upward in the opposite direction. The pad block 5 contacts the bottom surface of the outer ring of the wax model, and the guide rail slider 6 contacts the bottom surface of the inner ring. Thus, the wax model is ejected, completing the demolding process.

[0061] The linkage mechanism design of the integral casting mold for the diffuser assembly of this invention is as follows:

[0062] By designing the holes on the flower plate 14 and the dimensions of the slider and guide rail, the outer ring block assembly 1 and the inner ring block assembly 2 slide radially to a fixed position in the tenon groove. After the mold opening process is completed, the flower plate continues to rotate, and the guide pin 19 fixed on the flower plate 14 enters the track groove of the slider with guide rail 6 to complete the subsequent demolding process.

[0063] In another embodiment of the present invention, a method for integral casting of a diffuser assembly based on the above-described integral casting mold for diffuser assembly is provided, comprising:

[0064] Connect the wax injection machine to the inlet of the pouring pipe 11, start pouring until pouring is complete and then disconnect the pouring; lift the cover plate 25, the first guide rod 27 fixed on the cover plate 25 moves the first inner ring block 201 towards the center of the mold until the first guide rod 27 leaves the first inner ring block 201 and stops sliding, so that the first inner ring block 201 leaves the wax mold and the cover plate 25 is removed; drive the flower plate drive assembly to rotate the flower plate 14, and drive the second inner ring block 202 and the outer ring block assembly 1 along the flower plate 14 via the sliding connecting rod 32 on the flower plate 14. The flower disc 14 moves radially away from the diffuser assembly wax model to achieve mold opening; when the outer ring block assembly 1, the first inner ring block 201 and the second inner ring block 202 slide to a state where the diffuser assembly wax model can be removed without interference, all the leaf-shaped movable blocks 7 are removed and the flower disc 14 continues to rotate, so that the guide pin 19 enters the guide rail slider 6, and drives the guide rail slider 6 to move upward along the mold axis, so that the bottom surface of the inner / outer ring of the wax model is subjected to force and moves upward to disengage from the leaf-shaped movable block fixing seat 4, and the diffuser assembly wax model is removed.

[0065] Specifically, the entire casting operation steps of the diffuser assembly integral casting method of the present invention are as follows:

[0066] Lift the base 15 to a suitable position, install the bearing 16, rack 20, flower disc 14 and flower disc drive assembly, fix the guide rail slider 6, guide pin 19 and pad 5, and install the base 8 on the flower disc 14 through the second guide rod 31 and bolt bushing 17. Then install the leaf-shaped movable block fixing seat 4, pouring pipe 11, sliding tenon for inner / outer ring block installation and corresponding pressure block, sliding connecting rod 32 for guiding the inner / outer ring block sliding, leaf-shaped movable block 7, outer ring block assembly 1, inner ring block assembly 2 and pressure plate 3. Finally, install the outer shape fixing block 30, inner shape fixing block 26 and cover plate 25 along the second guide rod 31 and bolt bushing 17.

[0067] Connect the wax injection machine to the inlet of the pouring pipe 11 and begin pouring until completion, then disconnect the pouring. Remove the connecting bolts and lift the upper cover plate 25, causing the outer fixing block 30 and inner fixing block 26 to move upwards. The first guide rod 27 fixed on the cover plate 25 will push the first inner ring block 201 to slide towards the center of the mold until the first guide rod 27 leaves the first inner ring block 201, stopping the sliding and allowing the first inner ring block 201 to leave the wax model. Then remove the cover plate 25 assembly. Rotate the handle 23 to rotate the flower plate 14. The sliding connecting rod 32 on the flower plate 14 will drive the remaining second inner ring block 202 and the outer ring block sliding tenon 901 on the bottom surface of the outer ring block assembly 1 to slide in the groove and move radially away from the wax model along the flower plate 14, thus opening the mold. When the outer ring block assembly 1 and the inner ring block assembly 2 slide to a state where the wax model can be removed without interference, remove all the leaf-shaped movable blocks 7. Continue to rotate the flower plate 14 so that the guide pin 19 fixed on the flower plate 14 enters the guide rail slider 6. The guide rail slider 6 moves upward along the mold axis, so that the bottom surface of the inner / outer ring of the wax model is subjected to force and moves upward to disengage from the leaf-shaped movable block fixing seat 4. Remove the wax model and complete the demolding process and the casting of the overall diffuser.

[0068] In summary, this invention proposes a mechanized forming mold and casting method for precision integral casting of thin-walled complex diffusers with zero margin. It ingeniously utilizes mechanical transmission design to achieve a large forming mold while simultaneously enabling the integral casting of complex, thin-walled, high-precision diffusers. This solves the problem of low efficiency caused by manually attaching wax modules during on-site diffuser casting, improving wax model accuracy and product quality.

[0069] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A diffuser assembly integral casting mold, characterized in that, Includes a base (15); a rotatable flower plate (14), a base (8) and a cover plate (25) are arranged sequentially on the base (15); The flower plate (14) has two rows of first fixed trajectory holes and second fixed trajectory holes that are radially opposite in direction; the flower plate (14) is provided with several guide rail sliders (6) and several guide pins (19) that cooperate with the inclined guide rails of the guide rail sliders (6). The base (8) has a flower plate drive assembly connected to the flower plate (14) on its side and used to drive the flower plate to rotate; the base (8) has several first mortise and tenon assemblies on its outer side and several sets of second mortise and tenon assemblies and several sets of third mortise and tenon assemblies on its inner side at intervals; the first mortise and tenon assemblies have an outer ring block assembly (1) on their top, the second mortise and tenon assemblies have a first inner ring block (201) on their top, and the third mortise and tenon assemblies have a second inner ring block (202) on their top; the bottom of the first mortise and tenon assemblies and the third mortise and tenon assemblies are both provided with sliding connecting rods (32), and the sliding connecting rods of the first mortise and tenon assemblies and the third mortise and tenon assemblies are provided with sliding connecting rods. (32) One end passes through the first fixed trajectory hole and the second fixed trajectory hole respectively and is connected to the base (15); the base (8) is provided with a pad (5), a pouring pipe (11) and a blade block fixing seat (4); the pad (5) is located above several guide rail sliders (6); the pouring pipe (11) passes through the pad (5) and is connected to the pouring groove on the blade block fixing seat (4); several blade movable blocks (7) are provided on the blade block fixing seat (4); the side of the blade movable block (7) is in contact with the surface of the outer ring block assembly (1), the first inner ring block (201) and the second inner ring block (202); A profile fixing component is provided on the cover plate (25) to fit the top of the blade-shaped movable block (7), the outer ring block assembly (1), the first inner ring block (201) and the second inner ring block (202); a plurality of first guide rods (27) are provided at the bottom of the profile fixing component, and one end of the first guide rod (27) is located in the first guide rod hole opened at an inclination on the first inner ring block (201); The first mortise and tenon assembly includes a first mortise and tenon; an outer ring block sliding tenon (901) and a first pressing block (101) for limiting the outer ring block sliding tenon (901) are provided in the first mortise and tenon, and the outer ring block sliding tenon (901) is engaged with the mortise and tenon groove on the bottom surface of the outer ring block assembly (1); the second mortise and tenon assembly includes a second mortise and tenon; a first inner ring block sliding tenon (902) and a second pressing block (102) for limiting the first inner ring block sliding tenon (902) are provided in the second mortise and tenon, and the first inner ring block sliding tenon (902) is engaged with the mortise and tenon groove on the bottom surface of the first inner ring block (201); the third mortise and tenon assembly includes a third mortise and tenon; a second inner ring block sliding tenon and a third pressing block for limiting the second inner ring block sliding tenon are provided in the third mortise and tenon, and the second inner ring block sliding tenon is engaged with the mortise and tenon groove on the bottom surface of the second inner ring block (202).

2. The integral casting mold for the diffuser assembly according to claim 1, characterized in that, The flower plate (14) has several intermittently arranged annular grooves, and a stop block (18) is provided in the annular groove. One end of the stop block (18) is fixedly connected to the base (15).

3. The integral casting mold for the diffuser assembly according to claim 1, characterized in that, The flower disc drive assembly includes a worm bearing (22). A worm (21) is installed inside the worm bearing (22). A rack (20) that meshes with the gear on the side of the flower plate (14) is fitted on one end of the worm (21). A handle (23) is installed on the other end of the worm (21).

4. The integral casting mold for the diffuser assembly according to claim 3, characterized in that, The flower disc drive assembly also includes a housing (13). The outer casing (13) is fitted over the worm bearing (22) and the worm (21).

5. The integral casting mold for the diffuser assembly according to claim 1, characterized in that, A plurality of connecting rod bearings (33) are provided on the base (15), and the connecting rod bearings (33) are connected to the sliding connecting rod (32).

6. The integral casting mold for the diffuser assembly according to claim 1, characterized in that, The blade-shaped movable block (7) includes a blade-shaped block (701) on the outer side of the blade basin, a blade-shaped block (702) on the inner side of the blade basin, a blade-shaped block (703) on the outer side of the blade back, and a blade-shaped block (704) on the inner side of the blade back, which are connected in sequence. The blade-shaped block (701) on the outer side of the blade basin, the blade-shaped block (702) on the inner side of the blade basin, the blade-shaped block (703) on the outer side of the blade back, and the blade-shaped block (704) on the inner side of the blade back correspond to the blade basin and blade back profiles on the air intake side and the blade basin and blade back profiles on the exhaust side of the diffuser blade, respectively.

7. The integral casting mold for the diffuser assembly according to claim 1, characterized in that, The profile fixing assembly includes a pressure plate (3), an outer profile fixing block (30), several connecting blocks (28), a connecting rod (29), and several second guide rods (31); The outer fixing block (30) is connected to the cover plate (25) via the connecting rod (29); the pressure plate (3) is fixed by the inner ring groove of the outer fixing block (30) and plays a pressing role on the leaf-shaped movable block (7); the connecting block (28) is connected to the first guide rod (27); the second guide rod (31) is fitted with a bolt bushing (17), one end of the bolt bushing (17) passes through the outer fixing block (30) and is connected to the base (15).

8. The integral casting mold for the diffuser assembly according to claim 1, characterized in that, The base (8) is provided with several lifting rings (24); the base (8) is provided with several guide cones (12) for guidance.

9. A method for integral casting of a diffuser assembly based on the integral casting mold of the diffuser assembly according to any one of claims 1 to 8, characterized in that, include: Connect the wax injection machine to the inlet of the pouring pipe (11), start pouring until the pouring is completed and then disconnect the pouring; Lift the cover plate (25), and the first guide rod (27) fixed on the cover plate (25) will push the first inner ring block (201) to slide towards the center of the mold until the first guide rod (27) leaves the first inner ring block (201) and stops sliding, so that the first inner ring block (201) leaves the wax mold and the cover plate (25) is removed. The flower plate (14) is driven to rotate by the flower plate drive assembly. The second inner ring block (202) and the outer ring block assembly (1) are driven to move along the radial direction of the flower plate (14) away from the wax mold of the diffuser assembly, respectively, through the sliding connecting rod (32) on the flower plate (14), so as to realize mold opening. When the outer ring block assembly (1), the first inner ring block (201), and the second inner ring block (202) slide to a state where the diffuser assembly wax mold can be removed without interference, remove all the blade-shaped movable blocks (7) and continue to drive the flower plate (14) to rotate, so that the guide pin (19) enters the guide rail slider (6), and drives the guide rail slider (6) to move upward along the mold axis, so that the bottom surface of the inner / outer ring of the wax mold is subjected to force and moves upward to disengage from the blade-shaped movable block fixing seat (4), and the diffuser assembly wax mold is removed.

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