6.8　Head Wheel

6.8.1　The following methods for installing head wheel should be adopted:

1　Before installation of head wheel，the framework of sintering equipment should be installed up to the elevation of rail of upper trolley，framework above the elevation shall not be installed for the moment.A pair of temporary support and rail should be set up at head bending rail，which shall be connected to the rail of upper trolley of sintering equipment；

2　Two trolleys are placed on rail and connected temporarily，trolley grate and side plate shall not be installed.Head wheel shall be lifted onto the trolley which shall be moved to the temporary rail；

3　Temporary lifting beam and temporary support will be set at the higher platform beam of high span of plant for lifting head wheel.Slow-speed winch and pulley should be adopted to lift the head wheel；

4　Only after the head wheel is lifted reliably，and then the trolley is moved away.The temporary rail and support are dismantled，and then the head wheel is placed into position.

6.8.2　The alignment of head wheel（Figure 6.8.2）shall be in accordance with the following requirements:

Figure 6.8.2　Head wheel of sintering equipment

1-Head wheel；2-Bearing；3-Longitudinal centerline of sintering equipment

1　The elevation at both sides of head wheel，d and d′，shall be adjusted，and checked by level and steel ruler with tolerance of±0.5mm；

2　The levelness of bearings at both sides of head wheel，e and e′，shall be adjusted，and checked by high precision level with tolerance of 0.05/1000；

3　The axial bisector of head wheel shall be adjusted based on the longitudinal centerline of sintering equipment，and checked by wire/thread，thread pendant and steel ruler with tolerance|a-a′|of 1.0mm；

4　The axial centerline of head wheel shall be adjusted based on the transversal centerline of sintering equipment，and checked by wire/thread，thread pendant and steel ruler with tolerance|b-b′|and|c-c′|of 0.5mm.

6.8.3　Contact area between bearing and bearing base，between bearing base and framework of sintering equipment，shall contact closely after tightened by bolts；penetrated area by 0.05mm fill gauge shall not be more than 1/3 contact area.

6.8.4　Distance between centers of two bearings，and axial jump clearance shall meet requirements of design technical document.Stop blocks shall be welded for fixing at two radial sides of bearings after head wheel is aligned.

6.8.5　When chain blades of head wheel are assembled on site，the chain blades shall be rechecked for its pitch，thickness，blade gap of each set of chain blades，which shall be in accordance with the design technical document.After the assembly of head wheel，outer gap of two blades and tooth displacement shall be checked according to design document.