Metal-ceramic composite bearing journal for high and low-temperature wide-range temperature environment
A technology of ceramic composite and temperature environment, which is applied in the direction of rotating bearings, bearings, bearing components, etc., can solve the problems of bearing failure and other problems, achieve the effect of improving bearing life, low processing and manufacturing precision requirements, and improving anti-vibration performance
Active Publication Date: 2020-09-08
DALIAN UNIV OF TECH
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Problems solved by technology
However, due to the huge difference in thermal expansion coefficient between metal and ceramic, bearings designed in this way cannot work in high temperature environment
Method used
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[0020] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.
[0021] A metal-ceramic composite journal for a high and low temperature working environment in a wide range of temperatures (take a highly elastic thin-walled elastic metal bellows and nested structure as an example), including a metal shaft 1, a thin-walled elastic element, and a ceramic jacket 2. The inner diameter of the ceramic jacket 2 is larger than the outer diameter of the metal shaft 1, and the thin-walled elastic element is located in the gap between the ceramic jacket 2 and the metal shaft 1:
[0022] Using the method of thermal assembly, the metal shaft 1 is cooled down, the thin-walled elastic metal bellows 3 is heated, and then inserted from above the metal shaft 1 from top to bottom until the metal bellows 3 is in contact with the shoulder 6 of the metal shaft 1, Lower the temperature of the metal shaft 1 and the metal bellows 3 toge...
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The invention provides a metal-ceramic composite bearing journal for a high and low-temperature wide-range temperature environment and belongs to the technical field of machine design and manufacturing. The metal-ceramic composite bearing journal comprises a metal shaft, a thin-walled elastic element and a ceramic outer sleeve. The inner diameter of the ceramic outer sleeve is greater than the outer diameter of the metal shaft. The thin-walled elastic element is located in the gap between the ceramic outer sleeve and the metal shaft. The gap is filled with a lubricating agent. The bottom of the ceramic outer sleeve is provided with a plurality of uniform and symmetric groove structures. A shaft shoulder is mad on the lower portion of the metal shaft. The upper portion of the shaft shoulderis provided with convex block structures symmetric with the grooves at the bottom of the ceramic outer sleeve. When the ceramic outer sleeve is sleeved onto the metal shaft from top to bottom, the grooves at the bottom of the ceramic outer sleeve exactly encircle the convex blocks on the upper portion of the shaft shoulder to ensure that the ceramic outer sleeve 2 and the metal shaft have no relative displacement. The temperature stress of the bearing journal structure is adjusted completely through the thin-walled elastic element, the requirements for the machining and manufacturing precision of the bearing journal are low. The shock resistance of the bearing journal is improved. Thus, the service life of a bearing is substantially prolonged.
Description
technical field [0001] The invention belongs to the technical field of mechanical design and manufacture, and in particular relates to a metal-ceramic composite journal in a high and low temperature working environment with a wide range of temperatures. Background technique [0002] Sliding bearings are important industrial bearings that are widely used. The journal and bearing bush materials determine the working life and performance of the sliding bearing. In order to ensure the strength requirements, the journal material is mainly metal material. In order to improve the performance of bearings such as high temperature resistance, wear resistance, drag reduction, corrosion resistance and service life, various heat treatment technologies or surface strengthening technologies are often used on the journal surface, and various surface spraying strengthening technologies are widely used in the industry, such as various ceramics Coating technology, the surface of this journal ...
Claims
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IPC IPC(8): F16C17/22F16C33/04
CPCF16C17/22F16C33/04
Inventor 吴成伟马建立韩啸张伟马国军吕永涛
Owner DALIAN UNIV OF TECH