6.9　Gearing

6.9.1　For the common driving device with sliding bearing，rolling bearing，reducer，open gear and coupling，the installation shall be in accordance with design technical document or the current national standard GB 50231 General Code for Construction and Acceptance of Mechanical Equipment Installation Engineering.

6.9.2　The big gear and journal shall be cleaned before installation of flexible driving device，which shall be installed in the following sequence:big gear，torque rod bearing，torque rod，pinion assembly unit，tie beam，and vertical links and balance pole.

6.9.3　If key joint is adopted for connecting big gear of flexible driving device and shaft of head wheel，grinding and assembly of key shall be in accordance with design technical document.

6.9.4　If tension ring without key is adopted for connecting big gear of flexible driving device and shaft of head wheel，the gear wheel and tension ring shall be installed as follows:

1　Before tension ring is installed for flexible driving device，the big gear and journal shall be cleaned，and degreasing shall be carried out for journal，hole of gear，tension ring and bolts；

2　The mounting dimensions of main shaft and hole of gear wheel shall be checked，which shall meet the requirements of design document；

3　During installation of the big gear，hub or other parts shall not be knocked with big hammer.Dial gauge and inner micrometer shall be used to check the gap between gear hole and shaft.Tension ring shall be installed after confirming that gap between internal point and corresponding external point is not more than 0.05mm；

4　During tightening of high strength bolt，Dial gauge and inner micrometer shall be used to check the gap between gear hole and shaft，which shall not be more than 0.05mm.The radial and axial displacement at outer ring of the big gear shall not exceed 0.5mm；

5　A torque wrench shall be used to tighten the tension ring in several times with the set value；the tightening force shall meet the requirements of design document.

6.9.5　The torque rod bearing（Figure 6.9.5）shall be installed based on the big gear，which shall meet the following requirements:

1　Center elevation of head wheel of sintering equipment shall be used as reference for installation；elevation of torque rod bearing shall be adjusted by adding or reducing shims between bearing and bearing base，and checked by level，steel ruler with tolerance of±0.5mm；

2　The longitudinal and transversal centerline of bearing shall be adjusted based on the centerline of big gear，their gap（a，a′）（b，b′）shall be checked by wire/thread，thread pendant and steel ruler with tolerance of±0.5mm.

6.9.6　Installation of torque rod（Figure 6.9.5）shall be in accordance with the following requirements:

1　The spline shaft and globe bearing shall be cleaned before installation of torque rod，changing the lubricant，putting the torque arm onto the spline of torque rod；

2　After the alignment of torque arm，temporary support shall be set up at bottom，which shall be adjusted precisely after pinion assembly parts and vertical links are placed into position；

3　Levelness of torque rod shall be adjusted by high precision level with tolerance of 0.05/1000.

6.9.7　Pinion assembly parts shall be cleaned，which shall be lifted to the required position and fixed temporarily before the installation of vertical links and balance pole，and shall be adjusted after the installation of vertical links and balance pole.

6.9.8　Vertical links shall be installed at the bottom of pinion assembly parts，forming into the rectangular frame together with torque rod.The verticality of vertical links shall be checked，and shall be in accordance with design document.The position of pinion shall be adjusted to guarantee the center of its axis and center of big gear is at the same level.The gap between pinion center and torque rod bearing，gap between shaft pin center of rotating arm and bottom surface of bearing，shall be checked and in accordance with the design document.

6.9.9　Balance pole shall be installed during the spring is at the free status.After the balance rod is installed into right position，the spring compression amount shall be adjusted，which shall be in accordance with design document.

6.9.10　The clearance between rolling ring of big gear and pinion of flexible driving device，and the gear engagement shall be adjusted，and shall be in accordance with the design.

6.9.11　During adjustment of upper and bottom tie beam of pinion assembly parts，the preset clearance between nuts at the end and globe bearing end face shall be in accordance with design.