Centrifugal pump impeller casting device

Abstract

The utility model relates to a centrifugal pump impeller pouring device belongs to centrifugal pump manufacturing technical field. The upper die and lower die are closed together and enclose the impeller pouring cavity together, the lower die is evenly provided with the sliding slot matched with the blade core mould around, the sliding slot bottom is equipped with the guide groove that guarantees the blade core mould along blade camber direction movement, the blade core mould bottom is equipped with the sliding pin, the blade core mould is embedded in the sliding slot, the sliding pin is embedded in the guide groove, the push -and -pull device is installed on the lower die, and the telescopic end of push -and -pull device is articulated on the blade core mould, the blade core mould is driven through the push -and -pull device, and the stress is stable, and the sliding pin and guide groove accurate direction are passed through, guarantee blade core mould in the sliding slot along the designed operation camber stable sliding, effectively avoid blade, blade core mould deformation, guarantee product quality and effectively prolong the service life of mould, reduce the cost. Set up the ejection mechanism of the multiple point even distribution jacking block, and the ejection force is even, avoids the deformation or surface damage of impeller in the ejection process.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pump manufacturing technology, specifically relating to a centrifugal pump impeller casting device. Background Technology

[0002] The impeller is the core component of a centrifugal pump, and its manufacturing quality directly affects the pump's efficiency and service life. Currently, impellers are mainly produced by casting. For complex closed impellers, the metal blade core mold must be removed along the curvature direction. Existing technology uses forced removal of the mold, which damages the metal mold, resulting in a short mold life and increased mold costs. Summary of the Invention

[0003] In order to overcome the problems of metal mold damage, short mold life and increased mold cost caused by forced mold removal in the prior art, this utility model provides a centrifugal pump impeller casting device.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: A centrifugal pump impeller casting device mainly includes a base 1, a lower mold 2, an upper mold 3, a blade core mold 4, and a push-pull device 5. The lower mold 2 is installed on the base 1 via a column 11, and the upper mold 3 is installed on the lower mold 2. The upper surface of the lower mold 2 is provided with a cavity that matches the lower contour of the centrifugal pump impeller 6, and the lower surface of the upper mold 3 is provided with a surface that matches the upper contour of the centrifugal pump impeller 6. After the upper mold 3 and the lower mold 2 are closed, they together form the casting cavity for the impeller 6. The upper mold 3 is provided with... The lower mold 2 has a casting channel 31; the lower mold 2 is evenly provided with a sliding groove 21 that matches the blade core mold 4 around its perimeter. The bottom of the sliding groove 21 is provided with a guide groove 22 to ensure that the blade core mold 4 moves along the blade arc. The bottom of the blade core mold 4 is provided with a sliding pin 41 embedded in the guide groove 22. The blade core mold 4 can be slidably embedded in the sliding groove 21 and the sliding pin 41 is embedded in the guide groove 22. The lower mold 2 is provided with a lever arm 23 around its perimeter. The push-pull device 5 is rotatably mounted on the lever arm 23. The telescopic end of the push-pull device 5 is hinged to the blade core mold 4, and a blade casting cavity is formed between the blade core molds 4.

[0005] Furthermore, the top of the upper mold 3 is provided with vent holes 32 evenly distributed circumferentially.

[0006] Furthermore, an ejection mechanism is installed on the base 1, which includes a hydraulic cylinder 12, a top plate 13, an ejector rod 14, and an ejector block 15. The bottom of the lower mold 2 is provided with a through hole 24 and a groove 25. The hydraulic cylinder 12 is installed on the base 1, the top plate 13 is installed on the top of the hydraulic cylinder 12, the ejector rod 14 is evenly installed on the top of the top plate 13 along the circumference, the ejector rod 14 is inserted into the through hole 24, and the ejector block 15 is fixed on the top of the ejector rod 14 and is located in the groove 25.

[0007] Furthermore, the push-pull device 5 is one of the following: push-pull screw assembly, hydraulic cylinder, pneumatic cylinder, or electric push rod.

[0008] Furthermore, the push-pull screw assembly includes a rotating block 51, a screw 52, ​​and a handwheel 53. The rotating block 51 is rotatably mounted on the top of the lever arm 23. The screw 52 passes through the rotating block 51 and is threadedly connected to the screw 52. One end of the screw 52 is hinged to the blade core mold 4, and the handwheel 53 is mounted on the other end of the screw 52.

[0009] Furthermore, the lower mold 2 and the upper mold 3 are connected by bolts.

[0010] The beneficial effects of this utility model are: This invention uses a push-pull device to drive the blade core mold, ensuring stable force distribution. Precise guidance via sliding pins and guide grooves guarantees smooth sliding of the blade core mold along the designed running arc within the groove, effectively preventing deformation of the blade and blade core mold, ensuring product quality, extending mold life, and reducing costs. An ejection mechanism with multiple evenly distributed ejector blocks provides uniform ejection force, preventing impeller deformation or surface damage during ejection. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0012] Figure 2 This is a three-dimensional schematic diagram of the state without the upper mold of this utility model.

[0013] Figure 3 yes Figure 2 A top view of the status.

[0014] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0015] Figure 5 This is a three-dimensional schematic diagram of the base and lower mold of this utility model.

[0016] Figure 6 This is a three-dimensional schematic diagram of the upper mold of this utility model.

[0017] Figure 7 This is a three-dimensional schematic diagram of the blade core mold of this utility model.

[0018] Figure 8 This is a three-dimensional schematic diagram of the upper mold opening and the blade core mold being pulled out during demolding of this utility model.

[0019] Figure 9 This is a three-dimensional schematic diagram of the impeller in the ejected state of this utility model.

[0020] Figure 10This is a three-dimensional schematic diagram of the impeller cast according to this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0022] This utility model discloses a centrifugal pump impeller casting device, which mainly includes a base 1, a lower mold 2, an upper mold 3, a blade core mold 4, and a push-pull device 5. The lower mold 2 is mounted on the base 1 via a column 11, and the upper mold 3 is mounted on the lower mold 2. The upper surface of the lower mold 2 has a cavity that matches the lower contour of the centrifugal pump impeller 6, and the lower surface of the upper mold 3 has a surface that matches the upper contour of the centrifugal pump impeller 6. After the upper mold 3 and the lower mold 2 are closed, they together form the casting cavity of the impeller 6. The upper mold 3 has a casting channel 31. The lower mold 2 has evenly distributed grooves 21 around its perimeter that match the blade core mold 4. The bottom of the grooves 21 has a design to ensure that the blade core mold 4 is aligned with the blade core mold. The guide groove 22 guides the movement of the blade core mold 4. A sliding pin 41 is embedded in the guide groove 22 at the bottom of the blade core mold 4. The blade core mold 4 can be slidably embedded in the slide groove 21. The sliding pin 41 is embedded in the guide groove 22. A lever arm 23 is provided around the lower mold 2. A push-pull device 5 is rotatably mounted on the lever arm 23. The telescopic end of the push-pull device 5 is hinged to the blade core mold 4, forming a blade casting cavity between the blade core molds 4. The push-pull device 5 drives the blade core mold 4, ensuring stable force distribution. Precise guidance through the sliding pin 41 and guide groove 22 ensures that the blade core mold 4 slides smoothly along the designed running arc within the slide groove 21, effectively preventing deformation of the blade and blade core mold 4, guaranteeing product quality, extending mold life, and reducing costs. A multi-point evenly distributed ejection mechanism with top blocks 15 is provided, ensuring uniform ejection force and preventing deformation or surface damage to the impeller during ejection.

[0023] The upper mold 3 is provided with vent holes 32 evenly distributed around its top along the circumference; the complete venting system ensures the smooth discharge of air from the cavity, further guaranteeing the quality of the casting.

[0024] An ejection mechanism is installed on the base 1, which includes a hydraulic cylinder 12, a top plate 13, an ejector rod 14, and an ejector block 15. The bottom of the lower mold 2 is provided with a through hole 24 and a groove 25. The hydraulic cylinder 12 is installed on the base 1, the top plate 13 is installed on the top of the hydraulic cylinder 12, the ejector rod 14 is evenly installed on the top of the top plate 13 along the circumference, the ejector rod 14 is inserted into the through hole 24, and the ejector block 15 is fixed on the top of the ejector rod 14 and is located in the groove 25. The ejection mechanism with multiple evenly distributed ejector blocks provides uniform ejection force and avoids deformation or surface damage to the impeller during the ejection process.

[0025] The push-pull device 5 is one of the following: push-pull screw assembly, hydraulic cylinder, pneumatic cylinder, or electric push rod.

[0026] The push-pull screw assembly includes a rotating block 51, a screw 52, ​​and a handwheel 53. The rotating block 51 is rotatably mounted on the top of the lever arm 23. The screw 52 passes through the rotating block 51 and is threadedly connected to the screw 52. One end of the screw 52 is hinged to the blade core mold 4, and the handwheel 53 is mounted on the other end of the screw 52. The structure is simple and the operation is convenient.

[0027] The lower mold 2 and the upper mold 3 are connected by bolts.

[0028] Work process: The blade core mold 4 is pushed into the casting cavity of the impeller 6 by the push-pull device 5 (e.g., ...). Figure 2 and Figure 3 As shown), the upper mold 3 and the lower mold 2 are joined together (as shown). Figure 1 or Figure 4 As shown), casting is performed through the pouring channel 31, and internal air is discharged through the vent 32. The complete venting system ensures the smooth discharge of air from the cavity, further guaranteeing the quality of the casting. When demolding after cooling, the upper mold 3 is opened, and the blade core mold 4 is driven by the push-pull device 5. The force is stable, and the blade core mold 4 is precisely guided by the sliding pin 41 and the guide groove 22, ensuring that the blade core mold 4 slides smoothly out of the slide groove 21 along the designed running arc (as shown). Figure 8 As shown), this effectively prevents deformation of the blades and blade core mold 4, ensuring product quality and effectively extending the mold's service life while reducing costs; the impeller 6 is lifted by the hydraulic cylinder 12 driving the ejector rod 14 and ejector block 15 (as shown). Figure 9 As shown in the figure, the ejection mechanism of the top block 15 is evenly distributed at multiple points, and the ejection force is uniform, which avoids the deformation or surface damage of the impeller during the ejection process.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A centrifugal pump impeller casting device, characterized in that: The centrifugal pump impeller casting device includes a base (1), a lower mold (2), an upper mold (3), a blade core mold (4), and a push-pull device (5). The lower mold (2) is installed on the base (1) via a column (11), and the upper mold (3) is installed on the lower mold (2). The upper surface of the lower mold (2) is provided with a cavity that matches the lower contour of the centrifugal pump impeller (6), and the lower surface of the upper mold (3) is provided with a surface that matches the upper contour of the centrifugal pump impeller (6). After the upper mold (3) and the lower mold (2) are closed, they together form the casting cavity of the impeller (6). The upper mold (3) is provided with a casting channel (31). The lower mold... (2) A sliding groove (21) matching the blade core mold (4) is evenly provided around the perimeter. A guide groove (22) is provided at the bottom of the sliding groove (21) to ensure that the blade core mold (4) moves along the blade arc. A sliding pin (41) is provided at the bottom of the blade core mold (4) and is embedded in the guide groove (22). The blade core mold (4) can be slidably embedded in the sliding groove (21). The sliding pin (41) is embedded in the guide groove (22). A lever arm (23) is provided around the lower mold (2). A push-pull device (5) can be rotatably installed on the lever arm (23). The telescopic end of the push-pull device (5) is hinged to the blade core mold (4). A blade casting cavity is formed between the blade core molds (4).

2. The centrifugal pump impeller casting device as described in claim 1, characterized in that: The upper mold (3) has vent holes (32) evenly distributed around its top along the circumference.

3. A centrifugal pump impeller casting device as described in claim 1 or 2, characterized in that: The base (1) is equipped with an ejection mechanism, which includes a hydraulic cylinder (12), a top plate (13), an ejector rod (14), and an ejector block (15). The bottom of the lower mold (2) is provided with a through hole (24) and a groove (25). The hydraulic cylinder (12) is installed on the base (1), the top plate (13) is installed on the top of the hydraulic cylinder (12), the ejector rod (14) is evenly installed on the top of the top plate (13) along the circumference, the ejector rod (14) is inserted into the through hole (24), and the ejector block (15) is fixed on the top of the ejector rod (14) and is located in the groove (25).

4. The centrifugal pump impeller casting device as described in claim 3, characterized in that: The push-pull device (5) is one of the following: push-pull screw assembly, hydraulic cylinder, air cylinder, electric push rod.

5. The centrifugal pump impeller casting device as described in claim 4, characterized in that: The push-pull screw assembly includes a rotating block (51), a screw (52), and a handwheel (53). The rotating block (51) is rotatably mounted on the top of the lever arm (23). The screw (52) passes through the rotating block (51). The rotating block (51) and the screw (52) are threadedly connected. One end of the screw (52) is hinged to the blade core mold (4), and the handwheel (53) is mounted on the other end of the screw (52).

6. A centrifugal pump impeller casting device as described in any one of claims 1, 2, 4, and 5, characterized in that: The lower mold (2) and the upper mold (3) are connected by bolts.

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