Self-lubricating high-precision composite shaft, manufacturing method, shield pump, motor and fan

Abstract

The invention discloses a self-lubricating high-precision composite shaft, a manufacturing method and a shield pump, a motor and a fan which comprise the self-lubricating high-precision composite shaft. The self-lubricating high-precision composite shaft comprises a shaft body (1), wherein annular grooves (21 and 31) are formed in a friction part, which is matched with a sliding bearing, of the shaft body (1); the annular groove (21 and 31) are filled with high-molecular polymers with a self-lubricating characteristic by an injection molding process to form annular friction rings (2 and 3); and the friction rings (2 and 3) are firmly combined with the shaft body (1) integrally in the annular grooves (21 and 31). After injection molding, the self-lubricating high-precision composite shaft is finally formed by precisely grinding the outer diameter of the composite shaft, and the precision of the outer diameter is achieved. The self-lubricating high-precision composite shaft can be widely used in the field of shaft friction transmission.

Description

Technical field [0001] The present invention relates to a self-lubricating high-precision composite shaft and a manufacturing method thereof; in addition, the present invention also relates to a canned motor pump, a motor, and a fan including the self-lubricating high-precision composite shaft. Background technique [0002] Shaft is the basic component of motor and mechanical transmission equipment. The shaft material is usually metal, and ceramic materials are also used in micro and small motors. The shaft surface needs to be ground and polished to achieve the required precision and surface finish. The advantages of ceramic shafts are corrosion resistance and high hardness. They are commonly used in some liquid environments, but the disadvantages are relatively brittleness and low toughness. The shaft is usually used as a structural part, so it needs to meet high strength and high hardness. The problem of lubrication depends on the matching bearing to solve it, but under some s...

AI Technical Summary

Problems solved by technology

The advantages of ceramic shafts are corrosion resistance and high hardness. They are commonly used in some liquid environments, but the disadvantages are that they are relatively brittle and have low toughness.

The shaft is usually used as a structural part, so it needs to meet high strength and high hardness. The problem of lubrication must be solved by the bearing that matches it, but in some special working conditions, such as water, solvent, high temperature, small space and other environments , the cooperation between the traditional shaft and the bearing sleeve has the problem of insufficient life

At present, a new type of bearing has appeared, which is to add a shaft sleeve with interference fit or embedded fit lubricating material outside the ordinary shaft. The problem that the embedded structure is relatively separated from the shaft sleeve, and the accuracy of this part changes greatly at high temperature, it is difficult to meet the requirements of special occasions

[0003] The existing miniature canned pump cannot solve the friction problem through external lubrication because the liquid circulates in the pump. Therefore, both the shaft and the bearing are made of high-hardness ceramics as a pair of friction pairs. There will be friction between two high-hardness materials. One is worn and the ceramic itself is not lubricious

In addition, ceramic bearings are relatively easy to manufacture, but ceramic shafts are more difficult to process. First of all, they need to be hollow, and at the same time, the outer surface needs to be mirror-polished, which makes the cost of ceramic shafts high and fragile.

[0004] Due to the compact structure of the existing miniature high-temperature motors or high-temperature cascaded motors, the bearings cannot be relubricated, resulting in high noise and short motor life after running for a period of time

High noise and short service life are both problems of lubrication. The bearing loses its lubrication function due to the volatilization of the internal lubricant.

[0005] The existing miniature fan motor has a compact structure, and the diameter of the bearing is within 5mm. Such a tiny bearing has high precision, but the disadvantage is that there is too little oil storage. Microfans are usually used in high-temperature environments, and the oil inside the bearing volatilizes quickly, causing the fan to fail. Different sound

Images