Multi-stage pump, if you have seen the appearance, you will find that the multi-stage pump is composed of many stages. After dismantling the pump, you find that there are multiple impellers inside, which are connected in series to a shaft. This is a multi-stage pump. Multi-stage pumps are simply a series of single-stage pumps that are built together, which the discharge pressure can be very large. When water is supplied to a high pressure boiler, it is difficult if you do not use a multistage pump. Since it is a simple physical concatenation, the number of stages cannot be adjusted.
1. The multi-stage pump is equivalent to the battery in series. The water pressure of the output is related to the number of stages but the flow is not affected.
2. Single-stage pump refers to a pump with only one impeller, which is divided into single suction and double suction. A multi-stage pump is a pump with more than two impellers, and the number of stages can be up to several hundred.
3. The pump using centrifugal impeller is called centrifugal pump, generally in the mechanical seal or bearing needs to cool down, there is external tap water or cooling water jacket, and some pumps use internal circulation cooling system. Different pump structures and materials have different cooling requirements. For example, double suction pumps generally require a cooling water jacket at the bearing level above 120 degrees.
4. The multi-stage pump is composed of a plurality of vacuum centrifugal chambers, and the air is pumped and pressurized step by step. Due to the continuous operation of the impeller, the purpose of continuous pumping is achieved. The discharged gas passes through the air passage and is transferred to another stage (low vacuum level), which is pumped away by the low vacuum stage, and then compressed by the low vacuum stage and discharged to the atmosphere to form a two-stage pump or a multi-stage pump. At this time, the total compression ratio is borne by two stages, thereby increasing the ultimate vacuum.
