Bearing installation and maintenance, The third phase)

Bearing installation and maintenance, The third phase) 2018 - 09 - 02 ( TWB） 3 to install and remove the bearing, cylindrical hole of bearing installation is properly will influence the accuracy, life and performance. Design and assembly department for the installation of the bearing be fully research, can according to the bearing type, size, choice, heating, hydraulic machinery, such as the method, and according to the operation standard for installation. But in any case, all can't knock directly bearing ring, cage, roller, or seal, also can not be passed on from one roller bearing ring to a bearing ring, which can cause damage to race. Hope that in the before installation, bearing box is opened without washing directly fill grease. Operation standard project usually is as follows: cleaning bearing ( Instrument or high speed) Check the size of the associated components and associated parts and finishing installation ( Before the installation in a journal or a hole on the surface coated with a thin layer of engine oil) After good bearing installation check supply lubricant hoisting large bearing ( In addition to the above mentioned, but also should pay attention to the following requirements) 一) For inner ring has a hole for hoist products, eye bolt can be screwed into the hole for hoist, reoccupy sling hoisting. b） For there is no bearing hole for hoist, must use clean nylon sling hoisting heavy load, remember to use wire rope hoisting, lest in the bearing surface produce burr, scratches and foreign body into the bearing internal. Cold installation usually for cooperation is not too tight little bearing or bearing inside diameter less than 80 mm, can use mechanical or hydraulic press and assembly. Pressure, through a sleeve ring cross section, with the method of the hammers or hydraulic press, figure 1 below. Is wrong for below three tapping method. If you would have a separate bearing at the same time being connected to the shaft and the shaft seat, must ensure that the same pressure effect on the outer ring, at the same time, i. e. installation tools of two surfaces must be on the same plane, the following figure 2. Heat installation for large bearing, the force that press a trendy takes a lot of, so it is difficult to press in. General use induction heater or in oil heating. General heating temperature does not exceed 100 ℃, time of 20 ~ 30 minutes. Oil heating oil temperature is 80 - 100 ℃, the bottom of the bearing can not directly contact. General heated to higher than the required temperature 20 ~ 30 ℃, Highest do not exceed 120 ℃) To avoid bearing cool in operation, it is difficult to install. Note: when installation to install on the lateral surface of bearing lettering, in order to trace. Thermal expansion amount = d× ⊿t *; ɑ d = bearing inside diameter; ⊿ T = the difference between the heating temperature and environmental temperature; ɑ = linear expansion coefficient ( 11 by 10 Power 6) 。