Monobloc runner vane sand core core print

Abstract

This utility model discloses a sand core skeleton for integrally cast turbine blades, relating to the technical field of sand core fabrication for integrally cast turbine blades. This sand core skeleton for integrally cast turbine blades includes two clamping plates. The interior of each clamping plate is respectively provided with a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib. The bottoms of the first, second, and third reinforcing ribs are fixedly connected by positioning ribs. A screw is inserted into each clamping plate, with a nut threaded to one end of the screw. A washer is fitted onto the surface of the screw, with one side of the washer fitting against one side of the nut. This properly designed sand core skeleton improves the precision of sand core manufacturing, reduces the probability of sand core breakage, significantly improves the dimensional accuracy of the integrally cast turbine, and shortens the production cycle. Furthermore, different types of molding sand are used for molding. First, the core weight is calculated based on the density of each type of sand. Actual production on-site has proven that using this type of core skeleton ensures the core remains stable and does not deform.

Description

Technical Field

[0001] This utility model relates to the field of sand core manufacturing technology for integral casting turbine blades, specifically the core skeleton of integral casting turbine blades. Background Technology

[0002] The main challenge in manufacturing integral cast turbine runners lies in controlling the blade dimensions. 3D printing of the sand cores for the blades is the primary method for controlling the production of sand cores for integral cast turbine runner blades. Turbine runner blades are key components in water turbines, wind turbines, and other rotating machinery. Their design and performance directly affect the efficiency, stability, and lifespan of the entire equipment. Depending on different application scenarios and technical requirements, the design and manufacturing technologies of turbine runner blades also vary.

[0003] However, 3D printing technology can only control blade sand cores with smaller sand core weights. For sand cores with larger sand core weights, manual molding and production are still required. The design of the sand core skeleton is an important part of meeting the requirements of the integral casting runner production. Reasonable design of the blade sand core skeleton and production of blade sand cores can ensure the production quality of integral casting runners. Utility Model Content

[0004] The purpose of this invention is to provide a sand core for integrally cast turbine blades to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sand core core for integrally cast turbine blades, comprising two clamping plates, wherein a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib are respectively provided inside the two clamping plates, and the bottoms of the first reinforcing rib, the second reinforcing rib, and the third reinforcing rib are fixedly connected by positioning ribs.

[0006] A screw is inserted into the clamping plate, and a nut is threaded to one end of the screw. A washer is fitted on the surface of the screw, with one side of the washer fitting against one side of the nut and the other side of the washer fitting against one side of the clamping plate. During use, tightening the nut allows the two clamping plates to clamp and position the three reinforcing ribs, thereby increasing the stability of the core and facilitating subsequent use, while also improving the ease of use of the core.

[0007] Preferably, the surface of the screw is fitted with an anti-slip ring, one side of which is in contact with the nut side of the screw, and the other side of which is in contact with one of the clamping plates.

[0008] Preferably, the clamping plate has a circular hole for the screw to pass through, the inner wall of the circular hole is slidably connected to the surface of the screw, and the two clamping plates are attached to opposite sides.

[0009] Preferably, one side of the clamping plate is provided with a semi-circular groove for the passage of the first reinforcing rib, the second reinforcing rib and the third reinforcing rib, and the semi-circular grooves on the two clamping plates form a circular hole.

[0010] Preferably, the first reinforcing rib and the second reinforcing rib are fixedly connected by a first connecting frame, and the second reinforcing rib and the third reinforcing rib are fixedly connected by a second connecting frame. Both the first connecting frame and the second connecting frame are V-shaped. The reasonable sand core skeleton setting improves the accuracy of sand core manufacturing, reduces the probability of sand core breakage, and significantly improves the dimensional accuracy of the integral casting wheel, shortens the production cycle. At the same time, different types of molding sand are used for molding. First, the core weight is calculated according to the density of each type of sand. Actual production on site has proven that using this kind of core skeleton can make the core stable and not deformed.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) The sand core core of this type of integral casting impeller blade improves the accuracy of sand core manufacturing and reduces the probability of sand core breakage by setting a reasonable sand core core. At the same time, it greatly improves the dimensional accuracy of the integral casting impeller and shortens the production cycle. Different types of molding sand are used for molding. First, the core weight is calculated according to the density of each type of sand. Actual production on site proves that the use of this type of core core can make the core stable and not deformed.

[0013] (2) The sand core of this type of integral cast rotor blade is equipped with clamping plates and screws. During use, the nuts are tightened, and then the two clamping plates can clamp and position the three reinforcing ribs, thereby increasing the stability of the core and facilitating its subsequent use. It also improves the ease of use of the core. Attached Figure Description

[0014] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a two-dimensional structural diagram of the present invention from a second perspective;

[0016] Figure 3 This is a three-dimensional structural diagram of the present invention from a third-view perspective;

[0017] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Clamping plate; 2. First reinforcing rib; 3. Second reinforcing rib; 4. Third reinforcing rib; 5. Positioning rib; 6. Screw; 7. Nut; 8. Washer; 9. Anti-slip ring; 10. First connecting frame; 11. Second connecting frame. Detailed Implementation

[0019] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a sand core core for integral casting of turbine blades, including two clamping plates 1. The interior of the two clamping plates 1 is respectively provided with a first reinforcing rib 2, a second reinforcing rib 3 and a third reinforcing rib 4. The bottoms of the first reinforcing rib 2, the second reinforcing rib 3 and the third reinforcing rib 4 are fixedly connected by positioning ribs 5. A semi-circular groove is opened on one side of the clamping plate 1 for the first reinforcing rib 2, the second reinforcing rib 3 and the third reinforcing rib 4 to pass through. The semi-circular grooves on the two clamping plates 1 form a circular hole.

[0021] A screw 6 is inserted into the clamping plate 1, and a nut 7 is threaded to one end of the screw 6. A washer 8 is fitted onto the surface of the screw 6, with one side of the washer 8 fitting against one side of the nut 7 and the other side of the washer 8 fitting against one side of the clamping plate 1. During use, tightening the nut 7 allows the two clamping plates 1 to clamp and position the three reinforcing ribs, thereby increasing the stability of the core and facilitating subsequent use. An anti-slip ring is fitted onto the surface of the screw 6. 9. One side of the anti-slip ring 9 is attached to the nut side of the screw 6, and the other side of the anti-slip ring 9 is attached to one side of one of the clamping plates 1. The clamping plate 1 has a round hole for the screw 6 to pass through. The inner wall of the round hole is slidably connected to the surface of the screw 6, and the opposite sides of the two clamping plates 1 are attached. The first reinforcing rib 2 and the second reinforcing rib 3 are fixedly connected by the first connecting frame 10, and the second reinforcing rib 3 and the third reinforcing rib 4 are fixedly connected by the second connecting frame 11. Both the first connecting frame 10 and the second connecting frame 11 are V-shaped.

[0022] Working Principle: During use, (firstly, based on the thickness and weight of each part of the core), because the thickness varies across different parts of the core, with the smallest part only 28mm thick and many parts less than 55mm thick, and the sand core itself being relatively large, setting up a reasonable core skeleton improves the precision of sand core manufacturing, reduces the probability of sand core breakage, and significantly improves the dimensional accuracy of the casting wheel, shortening the production cycle. Different types of molding sand are used for molding. First, the core weight is calculated based on the density of each type of sand. Actual production on-site has proven that using this type of core skeleton ensures the core remains stable and does not deform. Setting up a reasonable core skeleton improves the precision of sand core manufacturing, reduces the probability of sand core breakage, and significantly improves the dimensional accuracy of the casting wheel, shortening the production cycle. Different types of molding sand are used for molding. First, the core weight is calculated based on the density of each type of sand. Actual production on-site has proven that using this type of core skeleton ensures the core remains stable and does not deform.

Claims

1. A core print for a whole cast runner blade core, comprising two clamps (1), characterized in that: The two clamps (1) are respectively provided with a first reinforcing rib (2), a second reinforcing rib (3) and a third reinforcing rib (4), and the bottom of the first reinforcing rib (2), the second reinforcing rib (3) and the third reinforcing rib (4) are fixedly connected by a positioning rib (5); A screw (6) is inserted into the clamp (1), and a nut (7) is threaded to one end of the screw (6). A washer (8) is fitted on the surface of the screw (6). One side of the washer (8) is in contact with one side of the nut (7), and the other side of the washer (8) is in contact with one side of the clamp (1).

2. The integrally cast runner vane sand core stem of claim 1, wherein: The surface of the screw (6) is fitted with an anti-slip ring (9). One side of the anti-slip ring (9) is in contact with the nut side of the screw (6), and the other side of the anti-slip ring (9) is in contact with one side of one of the clamps (1).

3. The integrally cast runner vane sand core stem of claim 1, wherein: The clamping plate (1) has a circular hole for the screw (6) to pass through. The inner wall of the circular hole is slidably connected to the surface of the screw (6), and the two clamping plates (1) are attached to opposite sides.

4. The integrally cast runner vane sand core stem of claim 1, wherein: One side of the clamp (1) is provided with a semi-circular groove for the passage of the first reinforcing rib (2), the second reinforcing rib (3) and the third reinforcing rib (4), and the semi-circular grooves on the two clamps (1) form a circular hole.

5. The integrally cast runner vane sand core stem of claim 1, wherein: The first reinforcing rib (2) and the second reinforcing rib (3) are fixedly connected by the first connecting frame (10), and the second reinforcing rib (3) and the third reinforcing rib (4) are fixedly connected by the second connecting frame (11). Both the first connecting frame (10) and the second connecting frame (11) are V-shaped.

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