The stability of the generator sealing oil system directly affects the safe operation and energy efficiency output of power plant equipment. Faced with the complex working conditions of high temperature, high pressure, continuous operation and other complex working conditions in the power production environment, the three-screw pump HSNH440-46 has become an indispensable key equipment in the power plant generator sealing oil system with its unique design advantages and excellent performance.

The sealing oil pump HSNH440-46 is designed for sealing oil delivery under harsh working conditions. The pump adopts a three-screw structure and a spiral profile composed of a special shape curve, which ensures the high efficiency, low noise and pulsation-free working characteristics of the pump. The main structure of the pump includes an active screw and two driven screws, which mesh with each other to form a sealed cavity in the pump cylinder. Through the rotation of the screw, the oil is continuously and evenly delivered.

The HSNH440-46 pump can work stably under high pressure, ensuring that the sealing oil forms a stable oil-gas pressure difference inside the generator, effectively preventing hydrogen leakage and protecting the internal insulation of the generator from damage. It is especially suitable for large-capacity generators using hydrogen cooling. Through the precise coordination of the three screws, the HSNH440-46 pump is almost pulsation-free during the conveying process, which is particularly important for the generator sealing system, which can reduce the impact on the seals, reduce wear, and improve the stability and reliability of the system.

Considering that the oil temperature in the generator sealing oil system may fluctuate with the change of the generator load, the HSNH440-46 pump adopts high-temperature resistant materials and design to ensure that it can still maintain good mechanical properties and sealing in a high temperature environment, extending the service life of the pump.

The outlet of the pump is equipped with a relief valve and a differential pressure regulating valve, among which the differential pressure regulating valve can automatically adjust the oil inlet pressure of the sealing pad to ensure that the oil pressure and the gas pressure inside the generator are kept within the ideal difference range, effectively adapting to the pressure fluctuations during the operation of the generator.

Considering the requirements of continuous operation of the power plant, the HSNH440-46 pump is designed with a structure that is easy to maintain. For example, the mechanical seal of the pump can be regularly inspected and maintained, and the operating status of the pump can be monitored in real time through the integrated monitoring system, which is convenient for timely detection and resolution of problems.

Yoyik offers various types of valves and pumps and its spare parts for power plants:
Seal oil pump (excluding motor) HSNH280-43NZ
oil seals 23 x 28 x 2.5 mm Thk
shut off valve in hydraulic system WJ25F1.6P
oil accumulator bladder (plus seal) A-10/31.5-L-EH
Check Valve PN 01001693
Moog valve D633-303B
Limit switch A2033
nozzle flapper servo valve 761K4112B
GREASE DISTRIBUTOR QJDF4-KM-3
Sinro Motorized Valve SR04GB32046B4
Servo valve D671-0068-0001
Unloading valve WJXH.9330A
dc solenoid valve 300AA00086A
spring loaded mechanical seal A108-45
Globe valve WJ41B4.0P
servo valve for turbine 072-559A
Vavle V38577
Accumulator gas tank NXQ A10/31.5-L-EH
Hydrogen shut-off valve WJ61W-16P
bellows globe valve core KHWJ40F-1.6P