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1. Relationship between motor cooling water channel and flow rate
The flow rate of motor cooling water channel is directly related to the cooling effect: the larger the flow rate, the more heat is taken away per unit time, and the better the cooling effect; However, excessive flow will increase the workload of the system pump and need to be matched with the waterway structure design. 1. The influence of flow rate on cooling effect: Flow rate is positively correlated with heat dissipation capacity: an increase in coolant flow rate can quickly remove the internal heat of the motor, preventing overheating of the winding and iron core and wheel hiding. For example, high-power motors often adopt high flow designs (such as 10-20 liters per minute) to cope with high thermal loads. The risk of insufficient flow: If the flow rate is too low (such as below 70% of the design value), the temperature rise of the coolant may be too high, which may cause insulation material aging or even burn the motor
2. The restriction of the water channel structure on the flow rate: the larger the cross-sectional area, the stronger the flow capacity, but the flow rate needs to be balanced - a large cross-sectional area may lead to a low flow rate, which in turn reduces heat transfer efficiency. The diameter of the waterway is usually designed to be 5-15 millimeters (adjusted according to the size of the motor). Waterway layout resistance: Excessive bending or long flow channels can increase hydraulic resistance, and the required flow rate needs to be maintained by increasing pump pressure (such as 0.2-0.5MPa). Optimizing design (such as reducing sharp turns and using spiral channels) can reduce resistance. 3. Key parameters in desig
2. The colder the mold, the shorter the cycle?
The colder the mold, the shorter the cycle. A too low coolant temperature may not effectively shorten the cycle, and may even have negative effects. The appropriate mold temperature and turbulence state are the key factors in shortening the cycle.. The lower the coolant temperature, the better. Experience has shown that reducing the coolant temperature has limited practical effects, and cooling is usually only effective at specific low temperatures (such as 50 ° F), below which the cycle may not be further shortened. For example, the customer attempted to reduce the water temperature from 50 ° F to 32 ° F to shorten the cycle time of the eight chamber PVC component (from 22 seconds to 18 seconds), but did not provide data to suppo
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