Novel magnetic fluid bearing and manufacturing method thereof

A manufacturing method and magnetic fluid technology, applied in the directions of bearings, bearing components, shafts and bearings, etc., can solve the problems that the magnetic fluid cannot be evenly distributed, affect the bearing performance, etc., achieve good chemical stability, excellent physical and mechanical properties, reduce The effect of friction

Active Publication Date: 2018-08-17
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a new type of magnetic fluid bearing, which solves the problem that in the prior art, the n-ring permanent magnet used for the outer ring of the inner sleeve of the bearing is formed by combining n-1 annular spacers, and the magnetic fluid cannot pass between the shaft and the inner sleeve of the bearing. Evenly distributed among them, which affects the performance of the bearing to a certain extent

Method used

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  • Novel magnetic fluid bearing and manufacturing method thereof
  • Novel magnetic fluid bearing and manufacturing method thereof
  • Novel magnetic fluid bearing and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A new type of magnetic fluid bearing, specifically as Figure 1-2 As shown, it includes bearing inner ring 1, permanent magnet cage 2, rolling element 3 and bearing outer ring 4 arranged in sequence from inside to outside; bearing inner ring 1 is set in bearing outer ring 4, and permanent magnet cage 2 is set in On the outer wall of the bearing inner ring 1, the rolling elements 3 are arranged on the permanent magnet cage 2, and the two sides of the magnetic fluid bearing are also provided with a bearing sealing cover 5, the upper end of the bearing sealing cover 5 is connected with the inner wall of the bearing outer ring 4, and the lower end It is connected with the outer wall of the bearing inner ring 1, and a sealed cavity is formed between the bearing sealing cover 5, the inner wall of the bearing outer ring 4 and the outer wall of the bearing inner ring 1, and magnetic fluid is injected into the cavity.

[0037] The cage 2 is a permanent magnet, and the magnetic f...

Embodiment 2

[0040] A method for manufacturing a novel magnetic fluid bearing, specifically implemented according to the following steps:

[0041] Step 1, surface treatment of bearing inner ring 1 and bearing outer ring 4

[0042]Step 1.1, soak the original bearing inner ring and the original bearing outer ring in the deoxidizing solution, and then conduct ultrasonic treatment at 20°C for 10 minutes, wherein the ultrasonic treatment power is 1.5kW / m 3 , the frequency is 300kHz; after the treatment, the deoxidized bearing inner ring and the deoxidized bearing outer ring are respectively obtained;

[0043] Wherein, the deoxidizing solution is formed by mixing a hydrofluoric acid solution with a concentration of 10% and a nitric acid solution with a concentration of 10% according to a volume ratio of 1:1;

[0044] In step 1.2, place the deoxidized bearing inner ring and the deoxidized bearing outer ring in step 1.1 in a hydrogen furnace, and keep them warm at 600°C for 20 hours. After the he...

Embodiment 3

[0054] A method for manufacturing a novel magnetic fluid bearing, specifically implemented according to the following steps:

[0055] Step 1, surface treatment of bearing inner ring 1 and bearing outer ring 4

[0056] Step 1.1, soak the original bearing inner ring and the original bearing outer ring in the deoxidizing solution, and then conduct ultrasonic treatment at 30°C for 8 minutes, wherein the ultrasonic treatment power is 1.5kW / m 3 , the frequency is 300kHz; after the treatment, the deoxidized bearing inner ring and the deoxidized bearing outer ring are respectively obtained;

[0057] Wherein, the deoxidizing solution is formed by mixing a hydrofluoric acid solution with a concentration of 10% and a nitric acid solution with a concentration of 10% according to a volume ratio of 1:1;

[0058] In step 1.2, place the deoxidized bearing inner ring and the deoxidized bearing outer ring in step 1.1 in a hydrogen furnace, and keep warm at 580° C. for 25 hours, and after the h...

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Abstract

The invention discloses a novel magnetic fluid bearing which comprises a bearing inner ring, a permanent magnet retainer, a rolling element and a bearing outer ring sequentially arranged from inside to outside. The bearing inner ring is arranged in the bearing outer ring; the permanent magnet retainer is arranged on an outer wall of the bearing inner ring; the rolling element is arranged on the permanent magnet retainer; bearing sealing covers are further arranged on two sides of the magnetic fluid bearing; the upper ends of the bearing sealing covers are connected with an inner wall of the bearing outer ring; the lower ends of the bearing sealing covers are connected with an outer wall of the bearing inner ring; a sealed cavity is formed among the bearing sealing covers, the inner wall ofthe bearing outer ring and the outer wall of the bearing inner ring; and a magnetic fluid is injected into the cavity. In addition, the invention further provides a manufacturing method of the novelmagnetic fluid bearing. The novel magnetic fluid bearing provided by the invention realizes magnetic fluid rolling friction without dry friction, is small in friction force, good in lubricating effectand high in sealing performance so as to be non-impact, stable, silent or noise-lowest during rotating, and is particularly suitable for high-rotating-speed and dusty environments.

Description

technical field [0001] The invention belongs to the technical field of bearings, and in particular relates to a novel magnetic fluid bearing and a manufacturing method thereof. Background technique [0002] Magnetic fluid, also known as magnetic liquid, ferrofluid or ferrofluid, is a new type of functional material. It has both the fluidity of a liquid and the magnetism of a solid magnetic material. It is composed of magnetic solid particles with a diameter of nanometers, A stable colloidal liquid formed by mixing base carrier liquid and surfactant. The fluid has no magnetic attraction when it is static, and it shows magnetism when an external magnetic field is applied. Because of this, it has a wide range of applications in practice and has high academic value in theory. [0003] Magnetic solid particles are usually mixed with a surfactant and a base carrier liquid, which can keep a certain distance between the magnetic solid particles to overcome van der Waals force and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/50F16C33/44F16C33/58F16C33/64F16C33/66F16C33/78C22C19/03C22C29/00C22C29/16
Inventor 胡瑞许春霞刘佐民张一兵燕松山解芳卢艳
Owner NANCHANG INST OF TECH
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