CN214349530U

CN214349530U - Large-scale aluminum alloy impeller low pressure casting device

Info

Publication number: CN214349530U
Application number: CN202023153021.7U
Authority: CN
Inventors: 张恭运; 张伟; 单既强; 韩桂强; 肖茂磊; 赵伟
Original assignee: Himile Mechanical Science and Technology Shandong Co Ltd
Current assignee: Himile Mechanical Science and Technology Shandong Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-10-08
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a low-pressure casting device for large aluminum alloy impellers, which comprises a die mechanism, wherein an annular water cooling part is arranged on the upper plane of the die mechanism; the annular cooling part comprises a plurality of circles of annular water tanks, and cooling water of the annular water cooling part enters from the outermost circle of the annular water tank and flows out from the innermost circle of the annular water tank; the utility model can improve the cooling speed of the casting, improve the cooling efficiency and improve the material quality of the casting; the cooling gradient of each part of the casting can be effectively ensured.

Description

Large-scale aluminum alloy impeller low pressure casting device

Technical Field

The utility model relates to a large-scale aluminum alloy impeller low pressure casting device belongs to aluminum alloy impeller low pressure casting technical field.

Background

Due to the reasons of technical inheritance, mature degree of process and the like, the low-pressure casting air-cooling process method is mostly adopted for the low-pressure casting of the aluminum alloy impeller, and the traditional low-pressure casting air-cooling process method of the aluminum alloy impeller is as follows: and a cooling air hole is drilled in the back cavity of the mold, compressed air is blown into the cooling air hole of the mold through the stainless steel cooling air pipe, and the corresponding position of the mold is cooled through a heat convection mode between the compressed air and the cooling air hole, so that the purpose of sequential solidification of the aluminum alloy impeller is achieved.

However, the low-pressure casting of the aluminum alloy impeller cooled by compressed air cooling has the following problems:

1. the compressed air cooling efficiency is low, the casting solidification speed is slow, the material performance quality is generally low,

2. compressed air blows into the air holes of the die, so that high noise and energy consumption waste are caused.

In addition, for large aluminum alloy impeller castings, only local areas are needed to be cooled intensively under most conditions, other parts cannot be cooled intensively, and the cooling gradient needs to be controlled strictly.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the large aluminum alloy impeller low-pressure casting device is provided to improve the cooling speed of the casting, improve the cooling efficiency and improve the material quality of the casting; the cooling gradient of each part of the casting can be effectively ensured.

For solving the technical problem, the utility model discloses a following technical scheme: a low-pressure casting device for a large aluminum alloy impeller comprises a die mechanism; the upper plane of the die mechanism is provided with an annular water cooling part; the annular cooling part comprises a plurality of circles of annular water tanks, and cooling water of the annular water cooling part enters from the outermost circle of the annular water tank and flows out from the innermost circle of the annular water tank.

Furthermore, a central cooling part is arranged at the center of the upper end of the die mechanism and comprises a cooling body, and the cooling body is a conical body provided with a closed conical cavity.

Furthermore, a plurality of nozzles are arranged in the cooling body, the nozzles are arranged close to the inner wall of the upper part of the conical cavity of the cooling body, and cooling water sprayed by the nozzles flows from top to bottom along the inner wall of the cooling body.

Furthermore, the annular water tank comprises a plurality of uniformly spaced annular grooves which are concentrically arranged, two adjacent annular grooves are communicated with each other, and a plurality of annular grooves form a water flow channel which is communicated from the outer ring to the inner ring in sequence;

the outermost ring of the annular water tank is connected with the first water inlet pipe, and the innermost ring of the annular water tank is connected with the first water outlet pipe.

Furthermore, the nozzle is arranged at the water outlet end of the second water inlet pipe; the second water inlet pipe is connected with the cooling body and extends into the cooling body.

Further, the big opening end of the cooling body faces upwards, and the small end of the cooling body faces downwards and extends into the forming element.

Furthermore, the central position of the cooling body is connected with a second water outlet pipe, and the second water outlet pipe extends into the bottom of the conical cavity.

Further, the number of the second water inlet pipes is multiple; a plurality of second inlet tube circumference evenly sets up.

Further, the mold mechanism comprises an upper mold, a lower mold, a core and a gate; the molding element is arranged between the upper die and the lower die, and the lower die is fixed on the casting platform; the core is disposed within the molding element and the gate is disposed in connection with the molding element and passes through the casting platform.

Further, the nozzle is of a spray type.

The utility model adopts the above technical scheme after, compare with prior art, have following advantage:

the utility model discloses use the water-cooling, through controlling water cold flow, temperature isoparametric, the cooling gradient of each part of control foundry goods that can be better.

The utility model discloses guaranteeing to realize under the prerequisite that the order solidifies, reducing casting shrinkage factor defect and surface defect, improving the casting yield more than 10%.

The present invention will be described in detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view showing the structure of an annular water tank (in the figure, the direction of arrows indicates the flow direction of cooling water);

FIG. 3 is a schematic view showing the structure of a cooling body (the direction of arrows in the figure indicates the flow direction of cooling water);

in the figure, the position of the upper end of the main shaft,

1-casting platform, 2-lower die, 3-upper die, 4-forming element, 5-core, 6-sprue, 7-annular water tank, 8-first water inlet pipe, 9-first water outlet pipe, 10-cooling body, 11-second water inlet pipe, 12-nozzle, 13-second water outlet pipe.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

Example 1

As shown in the figures 1-3 together, the utility model provides a large-scale aluminum alloy impeller low pressure casting device, including casting platform 1, mold machine structure and water-cooling mechanism, mold machine constructs the setting on casting platform 1, water-cooling mechanism sets up on mold machine constructs.

The mold mechanism comprises an upper mold 3, a lower mold 2, a molding element 4, a core 5 and a gate 6; the fixed casting platform 1 top of lower mould 2, forming element 4 sets up in lower mould 2 top, it establishes in forming element 4 top to go up mould 3, core 5 sets up in forming element 4, forming element 4 is located in runner 6 connects to pass casting platform 1.

The water cooling mechanism comprises an annular water cooling part and a central cooling part, and the annular water cooling part is arranged on the upper surface of the die mechanism, namely the top surface of the upper die 3; the annular water cooling part comprises an annular water tank 7, a first water inlet pipe 8 and a first water outlet pipe 9 which are connected with the annular water tank 7; the annular water tank 7 comprises a plurality of uniformly spaced annular grooves which are approximately concentrically arranged, the diameters of the annular grooves are reduced from outside to inside, and two adjacent annular grooves are communicated with each other, so that the annular grooves form a water flow channel which is communicated from an outer ring to an inner ring in sequence; the outmost ring of the annular water tank 7 is connected with a first water inlet pipe 8, and the outmost ring of the annular water tank 7 is connected with a first water outlet pipe 9.

The central cooling part is arranged at the central position of the die mechanism, namely the central part of the upper die 3; the central cooling part comprises a cooling body 10, the cooling body 10 is a conical body with a closed inner cavity arranged inside, and the inner cavity of the cooling body 10 is a conical cavity; the large opening end of the cooling body 10 is upward, the small end of the cooling body 10 is downward and extends into the forming element 4, the cooling body 10 is communicated with a second water inlet pipe 11 and a second water outlet pipe 13, and the number of the second water inlet pipes 11 is multiple, preferably four; the plurality of second water inlet pipes 11 are uniformly arranged in the circumferential direction, the second water inlet pipes 11 extend into the upper part of the conical cavity of the cooling body 10 and are arranged close to the inner wall of the conical cavity, the water outlet ends of the second water inlet pipes 11 are provided with nozzles 12, and the nozzles 12 are in a spray type, so that cooling water is sprayed out in a water mist shape, and on one hand, the contact area between the cooling water and a mold is increased; on the other hand, the cooling water is uniformly contacted with the inner wall of the mold.

The nozzle 12 is arranged close to the inner wall of the upper part of the conical cavity of the cooling body 10, and water mist sprayed by the nozzle 12 flows downwards along the inner wall of the cooling body 10 from top to bottom, so that the upper part of the cooling body 10 is cooled faster than the lower part, and a cooling gradient from top to bottom is formed at the central part of the impeller.

The second water outlet pipe 13 is arranged in the center of the cooling body 10 and extends into the bottom of the conical cavity.

The utility model discloses the theory of operation:

the utility model is provided with two cooling parts, namely an annular water cooling part and a central cooling part, wherein cooling water of the annular water cooling part enters from the outermost ring of the annular water tank, sequentially passes through a plurality of annular grooves and then flows out from the annular groove at the innermost ring, and a cooling gradient from outside to inside is formed at the plane part of the impeller; the cooling water of the central cooling part flows downwards from the upper part of the conical cavity of the cooling body along the inner wall, so that the upper part of the cooling body is cooled faster than the lower part of the cooling body, and a cooling gradient from top to bottom is formed in the central part of the impeller.

The utility model discloses can realize by outer to interior, from top to bottom cooling gradient, satisfy the requirement that thickest most is located the large-scale impeller pair cooling order of foundry goods top.

The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.

Claims

1. A low-pressure casting device for a large aluminum alloy impeller comprises a die mechanism; the method is characterized in that: the upper plane of the die mechanism is provided with an annular water cooling part; the annular water cooling part comprises a plurality of circles of annular water grooves (7), and cooling water of the annular water cooling part enters from the outermost circle of the annular water grooves (7) and flows out from the innermost circle of the annular water grooves.

2. The low-pressure casting device for the large aluminum alloy impeller according to claim 1, wherein: the upper end central point of mould mechanism puts and is equipped with central cooling part, central cooling part includes cooling body (10), cooling body (10) are for being equipped with the conical body that seals the toper chamber.

3. The low-pressure casting device for the large aluminum alloy impeller according to claim 2, wherein: the cooling body (10) is internally provided with a plurality of nozzles (12), the nozzles (12) are arranged close to the inner wall of the upper part of the conical cavity of the cooling body (10), and cooling water sprayed out from the nozzles (12) flows from top to bottom along the inner wall of the cooling body (10).

4. The low-pressure casting device for the large aluminum alloy impeller according to claim 1, wherein: the annular water tank (7) comprises a plurality of uniformly spaced annular grooves which are concentrically arranged, two adjacent annular grooves are communicated with each other, and a plurality of annular grooves form a water flow channel which is communicated from the outer ring to the inner ring in sequence;

the outermost ring of the annular water tank (7) is connected with a first water inlet pipe (8), and the innermost ring of the annular water tank is connected with a first water outlet pipe (9).

5. The low-pressure casting device for the large aluminum alloy impeller according to claim 3, wherein: the nozzle (12) is arranged at the water outlet end of the second water inlet pipe (11); the second water inlet pipe (11) is connected with the cooling body (10) and extends into the cooling body (10).

6. The low-pressure casting device for the large aluminum alloy impeller according to claim 2, wherein: the big end of the cooling body (10) faces upwards, the small end faces downwards and extends into the forming element (4).

7. The low-pressure casting device for the large aluminum alloy impeller according to claim 3, wherein: the central position of cooling body (10) connects second outlet pipe (13), second outlet pipe (13) stretch into the toper chamber bottom.

8. The low-pressure casting device for the large aluminum alloy impeller according to claim 5, wherein: the number of the second water inlet pipes (11) is multiple; the plurality of second water inlet pipes (11) are uniformly arranged in the circumferential direction.

9. The low-pressure casting device for the large aluminum alloy impeller according to claim 6, wherein: the die mechanism comprises an upper die (3), a lower die (2), a core (5) and a pouring gate (6); the forming element (4) is arranged between the upper die (3) and the lower die (2), and the lower die (2) is fixed on the casting platform (1); the core (5) is arranged in the molding element (4), and the sprue (6) is connected with the molding element (4) and penetrates through the casting platform (1).

10. The low-pressure casting device for the large aluminum alloy impeller according to claim 3, wherein: the nozzle (12) is of a spray type.