The air-side AC oil pump HSNH4400Z-46NZ is a device used in the sealing oil system of steam turbines for generators, primarily serving to provide high-pressure oil to ensure the normal operation of the generator’s air-side seal. The working principle of this pump is based on its unique structural design, typically employing a screw pump form, where liquid is drawn into the pump from the suction inlet by the rotating screws and continuously and pulsation-free transported to the discharge outlet along the axial direction.

Working Principle:

1. Oil suction process: As the pump’s screws rotate, a series of sealed chambers are formed between the screws and the pump casing. These chambers expand gradually during rotation, creating a negative pressure at the suction inlet and drawing the oil into the pump.

2. Transportation process: As the screws continue to rotate, the oil within the sealed chambers is pushed towards the discharge outlet. Due to the continuous rotation of the screws, the oil forms a continuous flow within the pump, achieving pulsation-free transportation.

3. Pressure regulation: The outlet pressure of the pump can be controlled by adjusting the speed of the screws or through an external pressure regulating device. In the sealing oil system, the high-pressure oil supplied by the pump passes through a cooler and filter before being injected into the air side of the sealing pad to form a stable oil film.

The air-side AC oil pump HSNH4400Z-46NZ is widely used in the sealing oil systems of steam turbines for generators in power plants. Its main functions include:

1. Providing high-pressure oil: Ensuring that a stable oil film can be formed on the air side of the sealing pad to prevent hydrogen leakage.

2. Maintaining oil film stability: By controlling the flow rate and pressure of the oil, the stability of the oil film is maintained, reducing friction and wear.

3. Cooling the sealing surface: The flow of oil also serves a cooling function, preventing the sealing surface from degrading the oil due to high temperatures.

The design of the air-side AC oil pump HSNH4400Z-46NZ allows it to operate stably in high-temperature and high-pressure environments, ensuring the safety and stable operation of the generator. Its efficient transport capacity and stable performance make it an indispensable key component in the sealing oil system of steam turbines for generators.

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