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

A composite shaft and high-precision technology, which is applied in the fields of motors, fans, and shielded pumps, can solve the problems of high corrosion resistance, high hardness, large precision changes, and high cost of ceramic shafts, and achieve good lubricity and good precision stability.

Pending Publication Date: 2017-02-22
静润能源(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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

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Experimental program
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Effect test

Embodiment 1

[0042] Such as Figure 1 ~ Figure 3 As shown, the self-lubricating high-precision composite shaft of this embodiment includes a shaft body 1. The friction part of the shaft body 1 that matches the sliding bearing is provided with annular grooves 21, 31, and the depth of the annular grooves 21, 31 is 0.5 mm, the depth is preferably within the range of 0.2-1.0mm. The widths L1, L2 of the annular grooves 21, 31 are the widths of the friction rings 2, 3, and are not less than the axial direction of the sliding bearing fitted here. The length of the ring grooves 21, 31 is filled with self-lubricating polymer polymer to form the ring friction rings 2, 3 through the injection molding process. The friction rings 2, 3 are in the ring grooves 21, 31 with the The shaft body 1 is firmly combined into one body, and the surface roughness of the annular grooves 21, 31 is not less than Ra6.3, and the roughness ensures a firm combination of the injection molding materials. After injection moldi...

Embodiment 2

[0046] This embodiment is a miniature canned motor pump (hot water circulating pump), including the self-lubricating high-precision composite shaft in the first embodiment, the shaft body 1 is made of metal, and the self-lubricating high The sliding bearing adapted to the precision composite shaft is made of ceramics. The two cooperate to achieve the best friction, that is, the cooperation of soft and hard materials, which solves the problem of the lack of lubricity of the ceramic shaft in the existing canned motor pump. The problem of easy wear by friction, the problem of large friction noise, and the problem of easy breakage are lower in cost. Such a high-hardness ceramic bearing and the metal shaft body in this embodiment and the self-lubricating material on the friction part of the metal shaft body form a perfect friction pair, which not only solves the problem of the shaft, but also solves the problem of friction.

Embodiment 3

[0048] This embodiment is a miniature high-temperature motor, including the self-lubricating high-precision composite shaft in the first embodiment. The sliding bearing that is adapted to the self-lubricating high-precision composite shaft in the motor adopts an oil-impregnated bearing, and its cost is low. The self-lubricating material of the friction part solves the problem of lubrication and wear resistance under oil-free conditions, which solves the problem of large noise and short life of the motor after running for a period of time under high temperature.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C3/02F04D29/043F04D29/053F04D29/02F04D29/046F04D29/056H02K7/00B23P15/14
CPCH02K7/003F04D29/02F04D29/043F04D29/046F04D29/053F04D29/056F16C3/02B23P15/14
Inventor 张攻坚徐占辉
Owner 静润能源(广东)有限公司
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