Tham khảo tài liệu 'hydrodynamic lubrication 2011 part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Infinitely Long Plane Pad Bearings 51 dx where p Since h is given by Eq. in the case of a plane pad bearing p x and hm will be as follows m - 1 1 - x x p x -7- . Ệ p x h22 m 1 m - mx x 2 h22 h m 2m m 1 Nondimensional pressure p x on the right-hand side of Eq. is shown in Fig. with m as a parameter. This shows the shape of pressure distribution. b. Load Capacity Fig. . Nondimensional load capacity of an infinitely long plane pad bearing as a function of pad inclination Integrating the oil film pressure over the pad width gives the load capacity of the pad bearing. Load capacity P per unit length will be rh2 r 1h2 rh2 dp rh2 dp P J p dx xp -J x-d dx -J x-d-dx 6juU c xi -z - m dx h1 h2 h3 6pUB2 Ph2 _Ị1 - hm dĩ h22 Ẳ I h h 52 4 Fundamentals of Thrust Bearings In the case of an infinitely long plane pad bearing the load capacity can be obtained as follows by using Eq. 6 1 r 2 m -1 .ln m--------- h22 m - 1 2 m 1 6jưUB2 h22 P m The relation between the nondimensional load capacity P m and the pad inclination m is shown in Fig. . The figure shows that the nondimensional load capacity has a maximum in the neighborhood of a pad inclination of m . c. Center of Pressure and Pivot Position Fig. . Center of pressure . the pivot postion of an infinitely long plane pad as a function of pad inclination The position xc of the center of oil film pressure is given as follows 1 Xc P J pxdx 3 PỈĨ22 h In the case of an infinitely long plane pad bearing the nondimensional center of pressure xc xc B is given as follows for a given inclination m by using Eq. x c 2m m 2 ln m - m - 1 5m 1 2 m - 1 1 m ln m - 2 m - 1 The dependence of xc on m is shown in Fig. . It is important to note that xc increases monotonously with m. Infinitely Long Plane Pad Bearings 53 This figure can also be interpreted as a graph that gives the inclination of a pad for a given pivot position. If a
