What kind of unit is available in the air branch factory

The most common failure of the liquid oxygen pump is the leakage of the seal. For the structure of mechanical seal, the key is the bad contact of the sealing surface of the dynamic and static ring of the friction pair. It is related to the grinding quality of sealing surface, the assembling quality of pump shaft and bellows, and the material of friction pair. For the labyrinth type seal structure, it is related to the adjustment of the seal clearance and the pressure of the seal gas. Other faults and solutions are as follows: 1) the pump can't start: the current is blocked. The circuit should be rechecked to switch on the current; the rotor gets stuck or the gap is too small. The pump should be removed for inspection and the clearance should be adjusted. 2) no drainage after starting: the steering of the pump is opposite. Check the motor steering, change the power wiring; the pump is not fully precooled, gas is generated. The pump should be stopped and fully precooled again; the inl...

Molecular sieve is a kind of crystal of siovenate, which has many micropores with uniform aperture size. The skeleton is usually negatively charged, and there is a cation in the pore channel that balances the negative charge of the skeleton. The earliest molecular sieve found was natural zeolite. People found that the ore exploited near the crater would produce bubbles after heating, so it was called zeolite. In 1930s, United Carbide Company of the United States firstly artificially synthesized 4A and 13X molecular sieves, and applied the molecular sieves as desicides in petrochemical industry. Later United Carbon Company successively discovered Y-type molecular sieve and applied it to the catalytic field, replacing the previous application of silicon-aluminum balls, which increased the gasoline production rate by more than 15%. At that time, the world's annual crude oil consumption was 400 million tons, and generate economic benefits of 8 billion dollars. Later, a series of molecul...