Liquid lifting box with brand-new structure for low-pressure casting of motor rotor
By using ceramic inner sleeve and titanium plate material in the liquid lift tank, combined with the design of heater and heater retaining ring, the problems of short life and poor insulation capacity of the liquid lift tank are solved, and the quality of the finished cast aluminum rotor and the service life of the liquid lift tank are significantly improved.
Patent Information
- Application Number
- CN202422156516.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The existing liquid lift tank has a short life, poor insulation capacity, and poor aluminum-liquid solidification guarantee capacity, resulting in high iron content and increased resistivity of finished cast aluminum rotors.
A new structure of liquid lift tank was designed, using ceramic inner sleeve and titanium plate material. The thickness of the ceramic inner sleeve is 20mm. There is a gap between the ceramic inner sleeve and the titanium plate. Heater installation holes are arranged on the outer wall of the liquid lift tank, and heater retaining rings are installed to improve insulation ability.
The ceramic inner sleeve is shielded from the mixing of iron ions caused by aluminum liquid erosion, avoiding the increase in the resistivity of the finished cast aluminum rotor; the insulation ability of the ceramic inner sleeve improves the sequential solidification of the aluminum liquid; the corrosion resistance of the titanium plate and the gap design of the ceramic inner sleeve extend the service life; the heater retaining ring and non-metallic material filling improve the insulation ability, ensuring that the temperature in the liquid lifting tank reaches 700℃.
Smart Images
Figure CN222999660U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of liquid-lifting boxes, and particularly relates to a liquid-lifting box with a new structure for low-pressure casting of motor rotors. Background Technique
[0002] When low-pressure casting motor rotors, the use of a liquid-lifting box significantly improves the quality of the cast rotors. However, the existing liquid-lifting boxes have a short service life. The scouring of molten aluminum causes the opening size of the liquid-lifting box to change, and in severe cases, embedding occurs; the Fe component in the liquid-lifting box is easily mixed into the finished cast aluminum rotor during the scouring stage of molten aluminum, resulting in an increase in the iron content of the cast aluminum rotor and an increase in resistivity; in addition, the heat preservation ability of the liquid-lifting box is poor, the heat dissipation is fast, and the ability to ensure sequential solidification is poor. Content of the Utility Model
[0003] In order to overcome the deficiencies of the prior art and solve the technical problems such as the short service life, poor heat preservation ability, poor ability to ensure sequential solidification of molten aluminum, and high iron content in the finished cast aluminum rotor of the existing liquid-lifting box, the utility model provides a liquid-lifting box with a new structure for low-pressure casting of motor rotors.
[0004] The utility model is realized through the following technical solutions.
[0005] The utility model provides a liquid-lifting box with a new structure for low-pressure casting of motor rotors, including a liquid-lifting box, a liquid-lifting pipe, and a heater;
[0006] The liquid-lifting box is provided with an open mouth, a liquid storage cavity is arranged in the inner cavity of the liquid-lifting box, a ceramic inner sleeve is embedded in the liquid storage cavity, a titanium plate is arranged at the top of the liquid-lifting box, and heater installation holes are evenly distributed on the outer side wall of the liquid-lifting box;
[0007] The liquid-lifting pipe is arranged below the liquid-lifting box, the liquid-lifting pipe is internally communicated with the liquid storage cavity, and a liquid-lifting pipe fixing piece is arranged on the side wall of the liquid-lifting pipe;
[0008] A plurality of the heaters are evenly distributed in the heater installation holes, and a heater retaining ring is further arranged on the outer side wall of the liquid-lifting box outside the heater installation holes.
[0009] Further, the structure of the liquid-lifting box is one of a cylinder and a cuboid.
[0010] Further, a flange is arranged on the outer side wall at the top of the liquid-lifting pipe.
[0011] Further, the thickness dimension of the ceramic inner sleeve is 20 mm.
[0012] Further, a first groove is arranged at the center of the bottom of the titanium plate.
[0013] Further, there is a gap between the first groove and the ceramic inner sleeve, and the size of the gap is 1 mm.
[0014] Furthermore, the length dimension of the first groove is greater than the diameter dimension of the ceramic inner sleeve.
[0015] Furthermore, the riser pipe fixing member includes an upper fixing plate of the riser pipe and a lower fixing plate of the riser pipe provided below the upper fixing plate of the riser pipe. Through holes are provided in the middle of the upper fixing plate of the riser pipe and the lower fixing plate of the riser pipe. The riser pipe is embedded in the through holes of the upper fixing plate of the riser pipe and the lower fixing plate of the riser pipe. The upper fixing plate of the riser pipe and the lower fixing plate of the riser pipe are fixedly connected by bolts.
[0016] Furthermore, a second groove and a third groove matching the flange are respectively provided at the lower end of the upper fixing plate of the riser pipe and the upper end of the lower fixing plate of the riser pipe.
[0017] The beneficial effects achieved by the present utility model are as follows: The ceramic inner sleeve is selected for the present utility model, and the thickness of the ceramic inner sleeve is 20 mm. Due to the presence of the ceramic inner sleeve, the possibility of an increase in the iron ion content of the cast aluminum rotor caused by the erosion of the aluminum liquid is shielded, thereby avoiding the increase in the resistivity of the finished cast aluminum rotor. At the same time, the ceramic inner sleeve is a poor conductor and has poor heat dissipation ability, which can effectively keep the aluminum liquid warm and improve the ability to ensure the sequential solidification of the aluminum liquid. Titanium plates are selected. Titanium plates have strong corrosion resistance to aluminum. There is a gap between the first groove of the titanium plate and the ceramic inner sleeve to ensure that the titanium plate and the ceramic inner sleeve do not come into direct contact. The pressure of the titanium plate is directly borne by the riser box, extending the service life of the ceramic inner sleeve and thus enhancing the service life of the riser box. Heater retaining rings are selected to improve the heat preservation ability of the riser box. Non-metallic materials can be filled at the interface between the heater retaining ring and the interface for placing the riser box, enabling the temperature inside the riser box to reach 700 °C and further enhancing the heat preservation ability of the riser box.
[0018] Compared with the prior art, the present utility model has the advantages of reduced iron content in the finished cast aluminum rotor, improved ability to ensure the sequential solidification of aluminum liquid, long service life of the riser box, and strong heat preservation ability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic structural diagram of the present utility model.
[0020] In the figure: 1. Riser box; 2. Riser pipe; 3. Heater; 4. Liquid storage cavity; 5. Ceramic inner sleeve; 6. Titanium plate; 7. Heater installation hole; 8. Riser pipe fixing member; 9. Heater retaining ring; 10. Flange; 11. First groove; 12. Gap; 13. Upper fixing plate of the riser pipe; 14. Lower fixing plate of the riser pipe; 15. Second groove; 16. Third groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The present utility model will be further described in detail below with reference to the drawings and embodiments.
[0022] Such as Figure 1As shown in the figure, a liquid-lifting tank for low-pressure casting of a motor rotor with a brand-new structure includes a liquid-lifting tank 1, a liquid-lifting pipe 2, and a heater 3.
[0023] The structure of the liquid-lifting tank 1 is one of a cylinder and a cuboid. The liquid-lifting tank 1 is provided with an open mouth. A liquid storage cavity 4 is arranged in the inner cavity of the liquid-lifting tank 1, and the liquid storage cavity 4 is used for gathering molten aluminum. A ceramic inner sleeve 5 is embedded in the liquid storage cavity 4, and the thickness dimension of the ceramic inner sleeve 5 is 20 mm. Due to the existence of the ceramic inner sleeve 5, the possibility of an increase in the iron ion content of the cast aluminum rotor caused by the erosion of molten aluminum is shielded, thereby avoiding the increase in the resistivity of the finished cast aluminum rotor; at the same time, the ceramic inner sleeve 5 is a poor conductor and has poor heat dissipation ability, which can effectively keep the molten aluminum warm and improve the ability to ensure the sequential solidification of the molten aluminum. A titanium plate 6 is arranged at the top of the liquid-lifting tank 1. The titanium plate 6 is not easily corroded by molten aluminum. A first groove 11 is arranged at the center of the bottom of the titanium plate 6, and the length dimension of the first groove 11 is greater than the diameter dimension of the ceramic inner sleeve 5, thus avoiding the possibility of contact between the ceramic inner sleeve 5 and the titanium plate 6. A gap 12 is arranged between the first groove 11 and the ceramic inner sleeve 5, and the size of the gap 12 is 1 mm. The existence of the gap 12 ensures that the titanium plate 6 and the ceramic inner sleeve 5 do not directly contact, and the pressure of the titanium plate 6 is directly borne by the liquid-lifting tank 1, prolonging the service life of the ceramic inner sleeve 5, thereby improving the service life of the liquid-lifting tank 1. Heater mounting holes 7 are evenly distributed on the outer side wall of the liquid-lifting tank 1, and a plurality of heaters 3 are evenly distributed in the heater mounting holes 7. The heaters 3 can heat the liquid-lifting tank 1 to improve the heat preservation ability in the liquid-lifting tank 1. A heater retaining ring 9 is further arranged on the outer side wall of the liquid-lifting tank 1 outside the heater mounting holes 7. The existence of the heater retaining ring 9 further improves the heat preservation ability of the liquid-lifting tank 1, and non-metallic materials such as asbestos felt can be filled at the interface between the heater retaining ring 9 and the interface where the liquid-lifting tank 1 is placed, so that the temperature in the liquid-lifting tank 1 reaches 700 °C, further improving the heat preservation ability of the liquid-lifting tank 1.
[0024] The lift pipe 2 is arranged below the lift tank 1. The lift pipe 2 is internally communicated with the liquid storage cavity 4. A flange 10 is provided on the outer side wall of the top of the lift pipe 2. The setting of the flange 10 facilitates the fixation of the lift pipe 2. A lift pipe fixing member 8 is provided on the side wall of the lift pipe 2. The lift pipe fixing member 8 includes an upper lift pipe fixing plate 13 and a lower lift pipe fixing plate 14 arranged below the upper lift pipe fixing plate 13. Through holes are provided in the middle of the upper lift pipe fixing plate 13 and the lower lift pipe fixing plate 14. The lift pipe 2 is embedded in the through holes of the upper lift pipe fixing plate 13 and the lower lift pipe fixing plate 14. The upper lift pipe fixing plate 13 and the lower lift pipe fixing plate 14 are fixedly connected by bolts. Second grooves 15 and third grooves 16 matching the flange 10 are respectively provided at the lower end of the upper lift pipe fixing plate 13 and the upper end of the lower lift pipe fixing plate 14. With the settings of the flange 10, the second grooves 15 and the third grooves 16, the space enclosed by the second grooves 15 and the third grooves 16 can just fix the flange 10. The concave-convex structure is beneficial to further fix and limit the lift pipe 2.
[0025] The working process of the present utility model is as follows:
[0026] Place the lift tank 1 on the platen of the fixed mold of the low-pressure casting equipment. Fill non-metallic materials such as asbestos felt at the interface between the heater retaining ring 9 and the place where the lift tank 1 is placed for heat preservation. Fix the lift pipe 2 below the lift tank 1 through the lift pipe fixing member 8. Connect the heater 3 to the power supply device so that the temperature in the lift tank 1 reaches 700 °C;
[0027] When the mold is lifted to fill the mold cavity, the molten aluminum is pressed into the lift pipe 2 by low-pressure air and continuously rises. Since the lift pipe 2 is communicated with the liquid storage cavity 4, the molten aluminum accumulates in the liquid storage cavity 4 for subsequent casting.
[0028] The embodiments of the present utility model have been described in detail above in conjunction with the drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, the embodiments can still be changed. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A new structure of a liquid lift tank for low-pressure casting of motor rotors, characterized in that: It comprises a liquid riser tank (1), a liquid riser pipe (2) and a heater (3); The liquid lift box (1) is open, the inner cavity of the liquid lift box (1) is provided with a liquid storage cavity (4), the liquid storage cavity (4) is embedded with a ceramic inner sleeve (5), the top of the liquid lift box (1) is provided with a titanium plate (6), and the outer wall of the liquid lift box (1) is evenly distributed with heater installation holes (7); The liquid riser (2) is arranged below the liquid riser box (1), the liquid riser (2) is in communication with the interior of the liquid storage chamber (4), and a liquid riser fixing member (8) is arranged on the side wall of the liquid riser (2); The plurality of heaters (3) are evenly distributed in the heater mounting hole (7), and the outer wall of the liquid riser (1) is located outside the heater mounting hole (7) and is also provided with a heater retaining ring (9).
2. According to claim 1, a new structure of a liquid lift tank for low-pressure casting of a motor rotor, characterized in that: The structure of the liquid lift box (1) is a cylinder or a cuboid.
3. According to claim 1, a new structure of a liquid lift tank for low-pressure casting of a motor rotor, characterized in that: The top outer side wall of the riser pipe (2) is provided with a flange (10).
4. According to claim 1, a new structure of a liquid lift tank for low-pressure casting of a motor rotor, characterized in that: The thickness of the ceramic inner sleeve (5) is 20 mm.
5. A liquid lift tank for low-pressure casting of a motor rotor with a new structure according to claim 4, characterized in that: A first groove (11) is provided at the center of the bottom of the titanium plate (6).
6. A liquid lift tank for low-pressure casting of a motor rotor with a new structure according to claim 5, characterized in that: A gap (12) is provided between the first groove (11) and the ceramic inner sleeve (5), and the size of the gap (12) is 1 mm.
7. A liquid lift tank for low-pressure casting of a motor rotor with a new structure according to claim 6, characterized in that: The length dimension of the first groove (11) is greater than the diameter dimension of the ceramic inner sleeve (5).
8. The new structure of the liquid lift tank for low-pressure casting of motor rotors according to claim 3 is characterized in that: The riser pipe fixing member (8) comprises a riser pipe upper fixing plate (13) and a riser pipe lower fixing plate (14) arranged below the riser pipe upper fixing plate (13); through holes are arranged in the middle of the riser pipe upper fixing plate (13) and the riser pipe lower fixing plate (14); the riser pipe (2) is embedded in the through holes of the riser pipe upper fixing plate (13) and the riser pipe lower fixing plate (14); the riser pipe upper fixing plate (13) and the riser pipe lower fixing plate (14) are fixedly connected by bolts.
9. A liquid lift tank for low-pressure casting of a motor rotor with a new structure according to claim 8, characterized in that: The lower end of the upper fixing plate (13) of the riser pipe and the upper end of the lower fixing plate (14) of the riser pipe are respectively provided with a second groove (15) and a third groove (16) matching the flange (10).