1. The number of fan blades is small, and the air volume generated is small.
2. The fan speed is low, the wind pressure and air volume are small.
3. The motor has high power and high current, resulting in high temperature.
4. Dust and oil are attached to the motor, which reduces the heat dissipation capability and causes high temperature of the equipment. the
5. The voltage of the bus bar where the motor is located is 380V. Due to the cable voltage drop and uneven load distribution, the actual voltage applied to the motor is only 365V. The low voltage results in a large operating current.
Screw vacuum pump cooling measures
The cooling of the screw vacuum pump is mainly for the high temperature during the use of the screw vacuum pump. If the high temperature occurs in a short time, it is not a big problem, but it must be paid enough attention to the high temperature for a long time. Long-term high-temperature conditions will cause damage to all parts of the screw vacuum pump, and even cause the motor to be scrapped in severe cases. Let's take a look at the specific methods:
1. Keep the motor clean and tidy, remove the dirt on the motor in time, and improve the heat dissipation capacity of the screw vacuum pump.
2. Extended fan cover
① Lengthen the original fan cover of the screw vacuum pump by 40cm, and install an axial flow fan with the same diameter as the fan inside.
② The original fan of the screw vacuum pump is kept, and the axial flow fan is controlled by another power supply. After the screw vacuum pump starts The axial flow fan is running, and the axial flow fan is turned off 30 minutes after the stop, so that the main motor can obtain sufficient water cooling
3. Water cooling of the casing
①The shell of the screw vacuum pump adopts a hollow structure with two layers of wall thickness, which is called a water cooling jacket, and the coolant is embedded in it, which is the key heat dissipation channel.
②Water cooling is a common method: the water cooling jacket of the screw vacuum pump passes cooling circulating water, which can reach the purpose of water cooling the casing and thus water cooling the motor rotor. In addition, cooling water can be passed inside the motor rotor to increase the service life of the motor rotor and achieve water cooling effect.
③ Since the rotor of the screw vacuum pump has no grease to participate in the whole process of operation, the heat generated during operation cannot be taken away by the grease. Because there is no internal compression process, the temperature of the exhaust pipe is high. If the water cooling effect is not good, it will cause the deformation of the screw vacuum pump motor rotor and casing, which will affect the vacuuming effect. It can be put into use again if it is solved. If there is high temperature for a long time, it must be paid attention to and professional staff should be found for maintenance.
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Post time: Dec-17-2022