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Reasons for high-speed centrifuge motor heating

Oct 15, 2018

The vibration of a high-speed centrifuge is one of the important indicators to measure the performance of high-speed centrifuges. Vibration damping can take active damping and passive damping. Active vibration reduction is designed to avoid the operating speed of the high-speed centrifuge far from the critical speed of the rotating system. Passive damping is the separation of possible vibrations from the frame and foundation with various types of dampers.

1. Design the spindle bearing housing into a flexible damping type;

2. Flexible connection between the main shaft and the motor;

3. The entire drive system is flexibly coupled to the frame.

Rubber dampers generally meet the vibration reduction requirements of high-speed centrifuges. In the case where the structure of the damper has been determined, the greater the rubber hardness, the higher the critical speed of the system. The damper with too low hardness cannot meet the requirements and is easily damaged.

Let us tell you about the maintenance of high-speed centrifuges, I hope to help everyone.

1. Do not place any substance on the centrifuge cover. After each use, be sure to clean the inner cavity and the rotor.

2. If the desktop high-speed centrifuge is not used for a long time, the centrifuge cover should be opened for a period of time before use, and the inner cavity is dried.

3. After the motor's carbon brush is used for 3,000 hours, it should be replaced in time to avoid wearing the commutator.

4. When the desktop high-speed centrifuge is used for a long time, the wear is normal.

Reasons for high-speed centrifuge motor heating:

Perhaps because of the high speed of the high-speed centrifuge, its motor will be very prone to heat. If you feel that the motor of the high-speed centrifuge is hot, then we must pay attention to the operation of the centrifuge, which is probably related to the heat of the motor bearing, but what is the cause of the motor bearing heat?

The first reason may be centrifugal overload or overload, or there may be problems with the cooling fan, etc., or it may be the heat generated by mechanical friction, but the main reason is whether the bearing of the centrifuge is genuine, if the user is at a low price And the choice of low-cost bearings, such bearings are very easy to heat, and even the bearing burned. Therefore, users must choose authentic genuine bearings, do not choose cheap products and choose cheap products. Even if it is the same brand, its origin is different and the quality may be different.

The second reason is to pay attention to the lubrication of the machine, the selection of high-quality high-temperature lithium grease, the difference of lithium grease is another major cause of bearing heat. At the same time, we have to observe carefully, if the mechanical friction is accompanied by noise, and the mechanical parts will have obvious wear, which indicates that there is a problem with the bearing, then the bearing needs to be replaced. Therefore, it is recommended that people buy bearings of large brands, centrifuges to send high-speed equipment, high-speed is to use good bearings, high-quality bearings to ensure long-term normal operation of the centrifuge.

The third reason is whether the centrifuge spindle concentricity is accurate. Under normal circumstances, people will not pay attention to the concentricity. If the spindle concentricity tends to be large, it will easily cause the bearing to heat up. At this time, the centrifuge motor production is required to have strong technology and production capacity. In the real society, some centrifuge manufacturers buy their own materials to assemble themselves in order to save costs, which will cause the spindle concentricity to deviate, which will cause the bearing to heat up. .

The above points are the main reason for the heat of the centrifuge motor. There may be some reasons, such as the user not paying attention to the balance during use, which will also cause the motor to heat up. Therefore, in addition to choosing a high-quality centrifuge, people should also pay attention to the usual habits.

High-speed centrifuge is a small-tube centrifuge used in schools, laboratories, research institutes and other industries. It is a separation machine with high separation factor. It is mainly used to separate various suspensions that are difficult to separate and have a small solid content. The high-speed centrifuge is suitable for solid-liquid separation with low concentration, small particle size, high viscosity and small difference in specific gravity between the two media.