6.7　Vibration Sieve

6.7.1　The installation of spring base shall be in accordance with the following requirements:

1　Longitudinal and horizontal centerlines shall be aligned with eccentric axis as the reference，and the maximum allowable deviation shall be 2.0mm；

2　The elevation shall be aligned with the top surface of one spring base as the reference，and the allowable deviation shall be±2.0mm；the absolute value of relative elevation difference of other spring bases shall be no more than 2.0mm.

6.7.2　Before installing springs，check their free height，and the allowable deviation of free height shall be in accordance with the requirements of equipment technical documents.Springs shall be selected and arranged prior to installation，and their compressed height difference shall be checked after the installation of sieve.

6.7.3　The installation of box shall be in accordance with the following requirements:

1　The lower hopper of trolley shall be installed before installing box.When installing the box the clearance between the hopper and the box shall be in accordance with the requirements of equipment technical documents and shall be determined in accordance with vibration amplitude if no design requirements available；

2　The sieve system of vibration sieve shall be integrally hoisted.After the sieve system is in place，the maximum allowable deviations for longitudinal and horizontal centerlines shall be 3.0mm；the allowable deviation for sieve elevation shall be±5.0mm；

3　Check the screen surface with a gradienter and adjust the horizontal levelness.The maximum allowable deviation shall be 1/1000.

6.7.4　The installation of trolley rail shall be in accordance with the following requirements:

1　The maximum allowable deviation for longitudinal centerline shall be 2.0mm；

2　The maximum allowable deviation for rail elevation shall be 2.0mm；

3　Where the rail gauge is less than 4，000mm，its allowable deviation shall be 0-2.0mm；where the rail gauge is more than or equivalent to 4，000mm，its allowable deviation shall be 0-3.0mm；

4　The joint stagger shall be no more than 1.0mm.

6.7.5　The installation of transmission gear shall be in accordance with the following requirements:

1　Where sliding bearing is used for transmission shaft，the axial moving clearance of transmission shaft should be 0.3mm-1.6mm；when the hydrostatic bearing or dynamic pressure bearing is used，the axial moving clearance of transmission shaft shall be in accordance with the requirements of equipment technical documents；

2　Check the surface of eccentric bushing prior to installation.Its clearance after assembly shall be in accordance with the requirements of equipment technical documents；

3　When installing eccentric bushing，surfaces of eccentric bushing and gear shall be cleaned and lubricated before it is installed in central bushing；

4　After installing eccentric bushing，check the meshing contact of gear pairs of manual jigger using the dye method，and the result shall be in accordance with the requirements of equipment technical documents.

6.7.6　Test run shall be in accordance with the following requirements:

1　No-load test run shall meet the requirements of Article 3.0.11 in this code；

2　The screen surface shall be mechanically operated at a tightening state；

3　During the test run，the vibration amplitude shall be in accordance with the requirements of equipment technical documents；

4　During traveling，the wheels of the trolley shall contact continuously with，and shall not be off the rail.