Tilting pad' Figure 】

Tilting pad' Figure 】 2018 - 08 - 08 in sliding bearing, a fluid dynamic pressure bearing, by several independent can swing around the fulcrum of tile. According to the direction of the load, can be divided into tilting pad journal bearings and tilting pad thrust bearing. The working principle of tilting pad journal bearings. Bearing at work, with the aid of lubricating oil film in the tile surface and the function of fluid dynamic pressure shaft neck surface is formed between bearing oil wedge, it makes the surface completely out of touch. Oil wedge inlet and outlet of the oil film thickness 1 and 2, called clearance ratio, is an important parameter to affect the bearing capacity of the tile. And maximum bearing capacity than the corresponding clearance is called the optimal clearance ratio and its value along with the wide tile ( Segment of the axial size) B and the ratio of the length L, about 2 ~ 3. Tile pivot position should be the export of oil wedge, its value by clearance than certain. When clearance ratio of 2. 2, protection from the inlet side of the tile is about 0. 58L。 Along with the change of working condition of the bearing, tile surface slope and oil film thickness will be changed, but a gap is constant, always stay design state. This is tilting pad bearing is better than that of other oil bearing wedge formed surface area. The bearing capacity of the bearing capacity of the tilting pad journal bearings is vector and bearing capacity of each segment. Therefore, it is larger than that of single oil wedge liquid dynamic pressure radial bearing capacity is low, but high rotary precision, stable performance is good, widely used in machinery of high speed light load, such as the steam turbine and grinding machine. The number of segment is commonly 3 ~ 6. Tile arrangement with load is opposite between adjacent segment fulcrum and load is on a particular segment protection two kinds. If the same load, the latter axis eccentricity is small; If the load bearing of the biggest tile surface minimum oil film thickness is the same, the former high bearing capacity, small power consumption, low temperature. Tilting pad thrust bearing of the bearing capacity is the sum of each tile bearing capacity. Minimum number of segment is 3 pieces. For large thrust bearing segment number is more, the segment between the load balance is very important.