With the continuous improvement of stainless steel pump design and manufacturing technology and application technology, the manufacture and production of stainless steel pumps are developing in the direction of large-scale, large-capacity, high-lift high-speed, serialization, generalization, and standardization. The level of automatic control of pumping stations is also getting higher and higher.

1. Large-scale and large-capacity

In the past few years in 2009, the technology of large stainless steel pumps has developed rapidly. The diameter of the impeller of the giant axial flow pump has reached 7m, and the diameter of the impeller of the submersible pump has reached lm. The single unit capacity of the largest axial flow pump produced in my country is 6000kW, the mixed flow pump is 7000kW, and the centrifugal pump is 8000kW; the unit capacity of the high pressure boiler feed water pump has reached 60000kW; the delivery rate of the new centrifugal submersible pump has reached 1800m3/h, the corresponding head is 110m, and the maximum water output has reached 28800m3 /h, and has a tendency to expand again. In terms of pumping stations, there have also been a number of large-scale water pumping stations with novel structures, such as “egg”-shaped pumping stations, water inlet and outlet pipes, and pool-built pumping stations. With the promotion and use of submersible pumps in drainage, a number of large and medium-sized water pumping stations with small space, low investment and new structures have appeared correspondingly, such as wet well pump room structures made of steel or reinforced concrete.

2. High lift and high speed

With the continuous improvement of water pump cavitation, material strength and other issues, the speed of water pumps is also getting faster and faster. In the 1980s, the speed of the multi-stage segmented centrifugal pump at the international level was 7500r/min, and it has now increased to 10000r/min. The increase of the speed will inevitably increase the head of the pump. In 2009, the single-stage head of the boiler feed water pump broke the record of 1000m, and the head of the multi-stage pump can reach more than 2000m. In order to achieve a higher lift, the pump speed must be increased. After that, with the continuous advancement of technology, the speed of the pump has further developed in the direction of high speed. In the water pump industry, this high-speed development trend is worldwide.

3. Serialization, generalization and standardization

Serialization, generalization, and standardization of products (referred to as “three modernizations”) are inevitable requirements of modern industrial production processes. In 1975, the International Institute for Standardization formulated the main dimensions and specifications of single-stage centrifugal pumps with a rated pressure of 720kPa (ISO2858-1975E). The performance range of this standard pump is: the flow rate is 6.3-400m3/h, and the head is 25-125m. In 2009, all pumps meeting this specification were sold as standard pumps in Europe. Since 1958, our country has also done a lot of work in unifying the model, series classification, and finalizing the size. The main parts such as the bracket, suspension, and bearing frame of the water pump have series standards. “The level is increasing.

4. The automation level of the pumping station is gradually improved

In the past few years in 2009, the automation equipment of the pumping station has become more and more perfect, and the level of automatic control has also become higher and higher. Modern pumping stations can realize automatic control from unit startup, monitoring operation, shutdown to multi-stage pumping station system adjustment and optimal scheduling. Computer technology and network systems are increasingly widely used in pumping station automatic control, and the management level is also improving. gradually improving.

With the development of science and technology such as atomic energy and combustion industry, it will be further required to develop various special water pump products with high speed, high temperature and high pressure resistance, high efficiency and large capacity; at the same time, it is also required to continuously improve the quality and quality of existing conventional products. level. In order to achieve this goal, innovation must be carried out in a series of links such as basic theory, calculation technology, model test, measurement means, material selection, and processing technology. In terms of pumping station design and operation management, measures should be actively taken to maximize the efficiency of working water pumps and improve the automation control level of pumping stations.