The sealing ring is the key to the quality of the hydraulic truck

The focus of the annual 3.15 party is quality issues, and my country's National Lifting and Transportation Machinery Quality Supervision and Inspection Center will also conduct random quality inspections on the manual hydraulic trucks on the market to ensure that the trucks circulating in the market will not be Quality problems have resulted in serious casualties.

The quality inspection method is as follows:

The Supervision and Administration Bureau will conduct random inspections from some truck enterprises in the country, and then import some products from these enterprises. The focus is mainly on the manufacture, assembly, use, sealing, safety and hygiene of trucks. The method of sampling survey It is a reliable test method. It needs to repeatedly and continuously move the crank handle and perform 500 cyclic operations of lifting and lowering. During this period, no failure occurs. It is a product with better quality. After investigation, the quality of the truck in my country is obvious. improved compared to previous years.

The main parts of the failure of substandard products are as follows:

After testing, it was found that 80% of the trucks had failures in the hydraulic parts. Among them, the control valve failure, oil leakage failure, oil leakage failure at the movable seal of the cylinder piston rod, and oil leakage at the movable seal of the pump rod were more serious.

Through the survey results, we can find that the sealing effect is the key to the quality of the hydraulic truck. It is recommended that the company should check the compression rate of the sealing ring, try to add a retaining ring, improve its manufacturing accuracy, and meet the size standards and require careful assembly. Lubricate before assembly. In addition, there is a limited period of the rubber sealing ring. If the expiration date is exceeded, the new rubber ring must be replaced in time.