CN111496225A - Low-pressure cast aluminum pressurizing process for cast aluminum rotor of three-phase asynchronous high-voltage motor - Google Patents

Low-pressure cast aluminum pressurizing process for cast aluminum rotor of three-phase asynchronous high-voltage motor Download PDF

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Publication number
CN111496225A
CN111496225A CN202010442149.0A CN202010442149A CN111496225A CN 111496225 A CN111496225 A CN 111496225A CN 202010442149 A CN202010442149 A CN 202010442149A CN 111496225 A CN111496225 A CN 111496225A
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pressure
cast aluminum
voltage motor
kpa
low
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CN111496225B (en
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张文和
孔祥勇
闫俊伟
胡标
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Shanxi Electric Motor Manufacturing Co ltd
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Shanxi Electric Motor Manufacturing Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Induction Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

The invention relates to a low-pressure cast aluminum pressurizing process for a cast aluminum rotor of a three-phase asynchronous high-voltage motor, belongs to the technical field of cast aluminum rotor casting processes, and solves the technical problems that the original low-pressure cast aluminum parameters are not suitable for cast aluminum of the rotor of the high-voltage motor and the like. The technical scheme of the invention is as follows: the low-pressure cast aluminum pressurizing process for the cast aluminum rotor of the three-phase asynchronous high-voltage motor comprises the following stages: pressurizing the aluminum liquid for 10s at the boosting speed of 4.6-5.0 KPa/s under the initial pressure of 2KPa, wherein the pressure reaches 48-52 KPa; pressurizing for 4s at a pressure increasing speed of 7.3-7.7 KPa/s until the pressure reaches 77.2-82.8 KPa; maintaining the pressure for 405s under the final pressure of 77.2-82.8 KPa in the mold filling stage; and (4) discharging residual pressure after the pressure maintaining stage is completed, and thus completing the low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor. The invention makes specific limitation on the pressure parameter in the low-pressure cast aluminum of the cast aluminum rotor of the three-phase asynchronous high-voltage motor, adapts to the iron length of the iron core of the high-voltage motor, also considers the groove shape of the slender hilt, avoids the generation of defects in the casting process and ensures the quality of the cast aluminum rotor.

Description

Low-pressure cast aluminum pressurizing process for cast aluminum rotor of three-phase asynchronous high-voltage motor
Technical Field
The invention belongs to the technical field of cast aluminum rotor casting processes, and particularly relates to a low-pressure cast aluminum pressurizing process for a cast aluminum rotor of a three-phase asynchronous high-voltage motor.
Background
The low-pressure aluminum casting process for the cast aluminum rotor comprises the following steps of: melting aluminum ingot, preheating a mould, heating an iron core, purifying aluminum liquid and pouring at low pressure.
The three-phase asynchronous high-voltage motor, particularly a large-center high-voltage motor with H630 or above, has high power and long iron core length, and the liquid lifting resistance of the groove type of the slender cutter handle groove is large, so that in order to obtain a cast aluminum rotor with higher quality, the low-pressure cast aluminum parameters such as the pressurizing speed, the mold filling pressure, the pressure maintaining pressure and the like need to be adjusted.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a low-pressure cast aluminum pressurizing process of a cast aluminum rotor of a three-phase asynchronous high-voltage motor, and solves the technical problems that the original low-pressure cast aluminum parameters are not suitable for the cast aluminum of the rotor of the high-voltage motor and the like aiming at the problems of long iron core length and large liquid lifting resistance of a long and thin cutter handle groove.
In order to solve the problems, the technical scheme of the invention is as follows: the low-pressure cast aluminum pressurizing process for the cast aluminum rotor of the three-phase asynchronous high-voltage motor comprises the following stages:
1) a liquid lifting stage: pressurizing the aluminum liquid for 10s at the boosting speed of 4.6-5.0 KPa/s under the initial pressure of 2KPa, so that the pressure reaches 48-52 KPa;
2) and (3) a mold filling stage: pressurizing for 4s at a pressure increasing speed of 7.3-7.7 KPa/s to make the pressure reach 77.2-82.8 KPa;
3) and (3) pressure maintaining stage: maintaining the pressure for 405s under the final pressure of 77.2-82.8 KPa in the mold filling stage;
4) a pressure relief stage: and (4) discharging residual pressure after the pressure maintaining stage is completed, and thus completing the low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor.
The invention makes specific limitation on the pressure parameter in the low-pressure cast aluminum of the cast aluminum rotor of the three-phase asynchronous high-voltage motor, adapts to the iron length of the iron core of the high-voltage motor, also considers the groove shape of the slender hilt, avoids the generation of defects in the casting process and ensures the quality of the cast aluminum rotor.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
The low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor in the embodiment comprises the following stages:
1) a liquid lifting stage: pressurizing the aluminum liquid for 10s at the boosting speed of 4.6KPa/s under the initial pressure of 2KPa, so that the pressure reaches 48 KPa;
2) and (3) a mold filling stage: pressurizing for 4s at a pressure increasing speed of 7.3KPa/s to make the pressure reach 77.2 KPa;
3) and (3) pressure maintaining stage: maintaining the pressure for 405s at the final pressure of 77.2KPa in the filling stage;
4) a pressure relief stage: and (4) discharging residual pressure after the pressure maintaining stage is completed, and thus completing the low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor.
Example 2
The low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor in the embodiment comprises the following stages:
1) a liquid lifting stage: pressurizing the aluminum liquid for 10s at the boosting speed of 4.7KPa/s under the initial pressure of 2KPa, so that the pressure reaches 49 KPa;
2) and (3) a mold filling stage: pressurizing for 4s at the pressure increasing speed of 7.4KPa/s to ensure that the pressure reaches 78.6 KPa;
3) and (3) pressure maintaining stage: maintaining the pressure at 78.6KPa for 405s during the final pressure of the filling stage;
4) a pressure relief stage: and (4) discharging residual pressure after the pressure maintaining stage is completed, and thus completing the low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor.
Example 3
The low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor in the embodiment comprises the following stages:
1) a liquid lifting stage: pressurizing the aluminum liquid for 10s at the boosting speed of 4.8KPa/s under the initial pressure of 2KPa, so that the pressure reaches 50 KPa;
2) and (3) a mold filling stage: pressurizing for 4s at the pressure increasing speed of 7.5KPa/s to ensure that the pressure reaches 80 KPa;
3) and (3) pressure maintaining stage: maintaining the pressure for 405s at the final pressure of 80KPa in the filling stage;
4) a pressure relief stage: and (4) discharging residual pressure after the pressure maintaining stage is completed, and thus completing the low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor.
Example 4
The low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor in the embodiment comprises the following stages:
1) a liquid lifting stage: pressurizing the aluminum liquid for 10s at the boosting speed of 4.9KPa/s under the initial pressure of 2KPa, so that the pressure reaches 51 KPa;
2) and (3) a mold filling stage: pressurizing for 4s at the pressure increasing speed of 7.6KPa/s to ensure that the pressure reaches 81.4 KPa;
3) and (3) pressure maintaining stage: maintaining the pressure for 405s at the final pressure of 81.4KPa in the mold filling stage;
4) a pressure relief stage: and (4) discharging residual pressure after the pressure maintaining stage is completed, and thus completing the low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor.
Example 5
The low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor in the embodiment comprises the following stages:
1) a liquid lifting stage: pressurizing the aluminum liquid for 10s at the boosting speed of 5.0KPa/s under the initial pressure of 2KPa, so that the pressure reaches 52 KPa;
2) and (3) a mold filling stage: pressurizing for 4s at the pressure increasing speed of 7.7KPa/s to ensure that the pressure reaches 82.8 KPa;
3) and (3) pressure maintaining stage: maintaining the pressure for 405s at the final pressure of 82.8KPa in the filling stage;
4) a pressure relief stage: and (4) discharging residual pressure after the pressure maintaining stage is completed, and thus completing the low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor.

Claims (1)

1. The low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor is characterized in that: the method comprises the following steps:
1) a liquid lifting stage: pressurizing the aluminum liquid for 10s at the boosting speed of 4.6-5.0 KPa/s under the initial pressure of 2KPa, so that the pressure reaches 48-52 KPa;
2) and (3) a mold filling stage: pressurizing for 4s at a pressure increasing speed of 7.3-7.7 KPa/s to make the pressure reach 77.2-82.8 KPa;
3) and (3) pressure maintaining stage: maintaining the pressure for 405s under the final pressure of 77.2-82.8 KPa in the mold filling stage;
4) a pressure relief stage: and (4) discharging residual pressure after the pressure maintaining stage is completed, and thus completing the low-pressure cast aluminum pressurizing process of the cast aluminum rotor of the three-phase asynchronous high-voltage motor.
CN202010442149.0A 2020-05-22 2020-05-22 Low-pressure cast aluminum pressurizing process for cast aluminum rotor of three-phase asynchronous high-voltage motor Active CN111496225B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112247116A (en) * 2020-10-23 2021-01-22 东风汽车有限公司 Low-pressure casting process of motor casing with cooling water channel
WO2023284587A1 (en) * 2021-07-15 2023-01-19 山西电机制造有限公司 Low-pressure aluminum casting mold and low-pressure aluminum casting process for motor rotor

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112247116A (en) * 2020-10-23 2021-01-22 东风汽车有限公司 Low-pressure casting process of motor casing with cooling water channel
WO2023284587A1 (en) * 2021-07-15 2023-01-19 山西电机制造有限公司 Low-pressure aluminum casting mold and low-pressure aluminum casting process for motor rotor

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