tailieunhanh - Bearing Design in Machinery Episode 2 Part 5

Tham khảo tài liệu 'bearing design in machinery episode 2 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Problems 10-1 A circular hydrostatic pad as shown in Fig. 10-1 has a constant supply pressure ps. The circular pad is supporting a load of W 1000 N. The outside disk diameter is 200mm and the diameter of the circular recess is 100 mm. The oil is SAE 10 at an operating temperature of 70 C having a viscosity of m N-s m2. The pad is operating with a clearance of 120 mm. a. Calculate the flow rate Q of oil through the bearing to maintain the clearance of 120 mm. b. Find the recess pressure pr. c. Find the effective area of this pad. d. If the supply pressure is twice the recess pressure ps 2pr find the stiffness of the circular pad. 10-2 A circular hydrostatic pad as shown in Fig. 10-1 has a constant flow rate Q. The circular pad is supporting a load of W 1000 N. The outside disk diameter is 200 mm and the diameter of the circular recess is 100 mm. The oil is SAE 10 at an operating temperature of 70 C having a viscosity of m N-s m2. The pad is operating with a clearance of 120 mm. a. Calculate the constant flow rate Q of oil through the bearing to maintain the clearance of 120 mm. b. Find the recess pressure pr . c. Find the effective area of this pad. d. For a constant flow rate find the stiffness of the circular pad operating under the conditions in this problem. 10-3 A long rectangular hydrostatic pad as shown in Fig. 10-3 has constant flow rate Q. The pad is supporting a load of W 10 000 N. The outside dimensions of the rectangular pad are length is 300 mm and width is 60 mm. The inside dimensions of the central rectangular recess are length is 200 mm and width is 40 mm. The pad is operating with a clearance of 100 mm. The oil is SAE 20 at an operating temperature of 60 C. Assume that the leakage in the direction of length is negligible in comparison to that in the width direction the equations for two-dimensional flow of a long pad apply . a. Calculate the constant flow rate Q of oil through the bearing to maintain the clearance of 100 mm. b. Find the .