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First, clear, view and insulation pad requirements /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
1. Clearing of the bearing bush and viewing of the large motor bearings are carried out by themselves; after unpacking, use the eyebolts to remove the upper and lower tiles and mark them with fire oil; dry them with a dry cloth and check all the grooves. Whether it can be cleaned; whether there is casting residual sand; the tungsten gold layer is not well connected with the tile body; the channel and crack are drawn with blisters and other dopants, etc.) If it cannot be corrected, it is necessary to hang tungsten from the head.
2, the clearance of the bearing housing and before viewing the bearing seat device; should also be fully removed to view. Use the scraper to scrape the dirt inside the housing; wipe the dirt with cloth or gasoline; watch for cracks and Blisters; to avoid oil leakage during operation. The bearing cap and the bearing seat joint surface; the bearing seat and the bearing oil retaining ring contact surface should be researched and scraped together; and with a feeler gauge; the gap should not be greater than 0. 03 mm. Place the bearing The outer surface of the base should also be cleaned; there should be no bumps, rust and burrs. The screws that fasten the bearing seat and the thread of the seat plate should be carefully viewed; and try to tighten the screws to see if they are too tight or bald.
3. Bearing insulation layout It is necessary to pad the insulation plate or metal gasket between the bearing and the bottom plate; the metal gasket is used to adjust the horizontal orientation of the seat to adjust the relative orientation of the motor and another motor or machine. The metal gasket is made of 0. 08~3 mm metal sheet. The insulating mat is made of cloth laminate or glass wool laminate. The purpose of placing the insulating mat is mainly to avoid the damage of the shaft current. The insulating mat should be It is 5~10 mm wider than each side of the bearing housing; the thickness is 3~10 mm. Except for the insulation pad between the bearing and the bottom plate; the screws and studs should also be insulated together. The thickness of the insulating washer is 2~ It is made of 5mm glass cloth; its outer diameter is 4~5mm larger than the outer diameter of the iron washer. The tubing insulation pad that is connected with the bearing seat can be made of rubber sheet with thickness of 1~2mm. After the insulated bearing seat device Should check the insulation resistance to ground; measured with a 500 volt megohmmeter; its resistance should be no less than 1 megohm.
Second, the bearing seat device, whether it is a single motor bearing and multiple bearings of the unit; should be installed on the main longitudinal axis of the connected machine or on the longitudinal axis of the unit. Measuring the middle of the bearing is to use the method of hanging wire and wire hammer (A wooden strip in the bearing arc; a thin iron bar in the middle of the strip; marking the middle orientation).
Adjust the orientation of the shaft in the seat; it is from the beginning of the bearing housing on the far side; use the level gauge on the bearing seat surface to check the level of these planes. Use the theodolite or level to see if the planes of several axle seats can be in the same horizontal plane; And use the wire hammer to find out whether the middle of each bearing can be on the same axis as shown in Figure 1-5.
According to the above method, the adjustment of the bearing seat; in the process of eliminating the error; the application of the jack type to move the bearing seat; do not adopt the method of hitting and hammering. Using this method to adjust the accuracy of the bearing seat is about 0. 5~1. 0mm. It should be pointed out that the adjustment of the bearing seat is only pre-adjustment; when centering, it is necessary to adjust to reach the common demand of the shaft line. After the pre-adjustment of the bearing housing; Tighten the screws evenly (tightly in a diagonal cycle); the insulating sleeve and studs can be temporarily placed; wait until the centering operation is completed or before the test.
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Large motor bearing housing
Source: China Bearing Network Time: 2013-03-30