Leakage problem and maintenance characteristics of mechanical seals in circular arc gear pumps

【1】 Mechanical seal leakage problem of circular arc pump

(1) Pump mechanical seal leakage problem during the construction period of chemical equipment

During the construction stage of petrochemical equipment, there are problems such as poor external construction environment, inadequate product protection, and long construction period. Mechanical seal leakage may occur during pump installation, single machine debugging, and material debugging stages.

. During the pump installation stage, if the construction is not done properly and the protection of the finished product is not in place, the construction waste will enter the sealing end face from the pump inlet and outlet, which will cause wear on the sealing surface and lead to sealing leakage; During the pump debugging stage, impurities may enter the sealing end face due to incomplete flushing of the pipeline, causing wear and leakage of the dynamic and static rings; If the pump is left unused for a long time, it may cause aging of the sealing ring, inadequate sealing, and lead to leakage of the machine seal

(2) Mechanical sealing problems of pumps in the production stage of chemical products

1) External cracking of circular arc pumps

If uneven stress occurs during the operation of circular arc pumps in petroleum production, it will cause external cracking of the pumps. The detection of this problem requires force analysis of the circular arc pumps. However, in different periods and operating conditions, the degree of external force acting on the circular arc pumps varies, making the force analysis of the circular arc pumps have a certain probability, which increases the difficulty of detecting cracking problems.

2) The external corrosion of the circular arc pump

The working environment of the circular arc pump in petrochemical production will be corroded by external substances, and there are various types of petrochemical substances. In the actual material selection of chemical pump design, if the anti-corrosion properties of the construction materials of the circular arc pump cannot be grasped, it will cause serious corrosion damage to the external of the circular arc pump and lead to leakage.

[2] Maintenance of Circular Arc Oil Pump Equipment

Firstly, it is important to attach importance to the unified management of chemical circular arc oil pump equipment planning.

. Establish a system to manage arc oil pump equipment. When determining the maintenance content, it is necessary to list the inspection content in detail, refine it to the components to be inspected, and also clarify the handling procedures for problems with the operation and maintenance unit, so that when problems occur, the repair procedures can be immediately clarified and equipment maintenance can be implemented immediately. At the same time, clarify the maintenance system, clarify the maintenance time, content, and standards of equipment

Secondly, implement a contracting system. During the maintenance of the device, the specific tasks of each maintenance personnel and operator should be clearly defined. Each maintenance personnel and operator should carry out daily maintenance of the circular arc oil pump equipment, establish a responsibility system, and consider the proportion of equipment integrity as a key indicator related to employee performance and bonus evaluation. 3、 Implement full process and dynamic maintenance. When repairing the circular arc oil pump equipment, check and maintain it before and after use. Once any problems are found, they should be immediately resolved to eliminate hidden problems and minimize equipment energy consumption