The principle of the full-flow submersible electric pump device is that the water pump impeller is installed in the rotor cavity of the motor, forming a whole with the rotor. The rotor is equivalent to the impeller shell of the water pump, so that the ineffective part of the motor becomes the working part. When working, the water flows through the rotor cavity. The device maintains the advantages of the submersible electric pump such as low investment, compact structure, easy installation, low noise and good heat dissipation.
(1) Compact structure and shortened size The full-flow submersible electric pump has a short axial length and compact structure. Compared with the dry submersible axial flow pump, the axial length is only 1/2 of the dry submersible electric pump length, which is light in weight and saves 30% of consumables. The full-flow submersible electric pump has a compact structure, which can greatly simplify the pump station structure, optimize the pump station device, facilitate pump station management, and save engineering costs. It can also derive a large number of installation methods suitable for engineering applications, such as vertical, horizontal and inclined. The full-flow submersible electric pump is particularly suitable for pump stations with two-way drainage and irrigation. Horizontal cross-flow is the main installation method, and it can also be installed in an inclined or vertical manner.
(2) Wet stator structure, winding does not need to be sealed The full-flow submersible electric pump has a wet stator winding structure. Its coil adopts nylon sheath + irradiated cross-linked polyethylene multi-layer co-extrusion. The winding is a fully sealed structure, not afraid of water immersion, and there is no insulation safety problem caused by water leakage due to poor sealing. The reliability is much higher than the existing dry stator submersible electric pump.
(3) The efficiency of the device is significantly improved. The water flows through, reducing the impact of bends and special-shaped pipes. The flow velocity is evenly distributed, the flow state is smooth, and the local loss is very small. In addition, the flow channel is short and the flow channel loss is small, so the efficiency of the device is significantly improved.
(4) Very low noise and good heat dissipation conditions. The operating conditions are greatly improved, the underwater heat dissipation conditions are good, the noise is low, and the impact on the environment is small. The bearings are located in the working water flow channel, and the bearing cooling effect is significant.
(5) Quick installation and high degree of automatic control. The full-flow submersible electric pump can be installed in a variety of ways: vertical installation (steel wellbore floor installation and elbow straight installation), horizontal installation (dry pit installation, wet pit installation, gate installation, coupling installation) and inclined installation (oblique-pull coupling installation, oblique-pull sled installation). The construction period is short and the installation is quick. According to customer needs, the winding temperature rise protection, bearing temperature rise protection and motor water shortage protection can be arranged internally to monitor the operation process in real time, achieve early warning, and facilitate remote automatic control to ensure the safety and reliability of the pump operation.
(6) Two-way drainage function The horizontal installation of the full-flow submersible electric pump can use S-shaped blades for two-way drainage, or it can be electrically driven to reverse the pump body to achieve two-way drainage. This method can use one pump for two purposes, saving investment and reducing space.
(7) Convenient operation and management, easy maintenance Compared with traditional submersible electric pumps, the full-flow submersible electric pump eliminates the need for water inlet monitoring and protection of the motor terminal box, water inlet monitoring and protection of the motor cavity, water inlet monitoring and protection of the oil chamber, excessive winding temperature rise monitoring and protection, and excessive bearing temperature rise monitoring and protection. This greatly reduces the failure mode of the full-flow submersible electric pump and improves the stability of the water pump, making operation and management simpler and more convenient. Maintenance is easy to implement by yourself. After a little training, the pump station staff can carry out medium and major repairs of the full-flow submersible electric pump and even replace part of the winding by themselves.
(8) Good installation stability of the full-flow submersible electric pump Because the full-flow submersible electric pump is very short (only half the length of an ordinary submersible electric pump), it is particularly suitable for combination with a gate to form a stable and rigid drainage system. This is an upgraded version of the traditional gate pump. It can be combined with a full-flow submersible electric pump to form a drainage system by utilizing existing gates. No additional civil engineering work is required for pump installation, significantly reducing project costs and making it a zero-civil engineering pump.
This demonstrates that full-flow pumps are highly efficient, reliable, and resource-saving products, fully aligning with the national policy of promoting the development of energy-saving and consumption-reducing products. They are worthy of vigorous promotion and are particularly suitable for flood control and drainage applications. They represent the future development trend of submersible electric pumps.
