Maintenance of CBG2 gear pump
In the process of completing the various tasks, the CBG2 gear pump failure caused the equipment operation rate decreased or even can not work, especially under the field conditions, how to deal with the failure? According to the structural characteristics of CBG2 gear pump with "three piece structure, fixed side plate, two seals" and "side plate can be thin, reversible direction" and other practical experience, we can take the following methods:
Reduce size method: side panel burns, wear and scratches are the main reasons for axial leakage of CBG2 gear pumps (leakage due to side plate damage accounts for about 80% of the total axial leakage). Due to the axial clearance between the gear of CBG2 type gear pump side and side plate (0.05~0.10mm), the processing precision is manufacturing factory on the pump body thickness and the width of the work gear to ensure that, without any side effects of the thickness of this gap, it can take the turning, grinding, polishing and grinding to repair the side. To reduce the size in repair side, should make the remaining sintered bronze layer thickness between 0.35~0.50mm.
Replacement method: with serious battle damage or temporary mission equipment on the same displacement CBG2 type gear pump replacement, or CBG2 type gear pump with different inlet and outlet pipe joint restructuring after the substitution (CBG2 type gear pump of different displacement installation of the same size). Using the substitution method, should pay attention to alternative pump and replaced the pump rotation direction is the same. The pump with different rotation direction should be divided into 180 parts after the pump body and the side plate are rotated, and the assembly can be replaced.
Installation method: CBG2 type gear pump gear pump in vitro and in addition to other parts, is all common. Therefore, in the scrapped CBG2 gear pump, the parts which can be used can be disassembled according to the need to be assembled into a complete pump, which can be used after the debugging and qualification.
Transposition method: because the CBG2 gear pump has left and right side, gear wear concentrated in the gear side. According to this, transposition method can be used to change the same displacement to different gear pairs, so that the gear is not worn and become a new meshing surface. If you do not have the above conditions, can also be installed on the pump head gear, the driven gear is not worn side become the new mesh, improve the meshing engagement, reduce tooth leakage among. For the two rotary oil seal CBG2 type gear pump installed in the "back to back" can also be used to change a method. That is to say, when the oil seal is prevented from leaking due to the damage of the rotary oil seal caused by the outer leakage, and when the rotary oil seal with dustproof function is not damaged, the two can be transposed for emergency use.
