Wind power industry filter system

The speed increasing gearbox, one of the important components of the wind turbine, operates under high stress and harsh environment. The key components of its bearings and gears must be effectively lubricated and protected. The lubricating oil must be equipped with the best efficient filtration to ensure the normal and effective operation of the gearbox and fan.

The speed increasing gearbox, one of the important components of the wind turbine, operates under high stress and harsh environment. The key components of its bearings and gears must be effectively lubricated and protected. The lubricating oil must be equipped with the best efficient filtration to ensure the normal and effective operation of the gearbox and fan.

application

wind power generation system

Technical Parameter

Operating temperature:-40℃~90℃

Oil cleanliness: The initial grade of oil is IS04406-19/17/14 (grade 8), and it can reach the grade of ISO4406-17/15/12 (grade 6) after filtering

Filtration precision: 10μm, β10(C)>400 (fine filter element) ; 50μm (safety filter element), (can be customized according to customer requirements)

Filtration efficiency: ≥99.75%

Initial pressure drop:≤ 47KPa

Filter element replacement alarm differential pressure: 3.5bar

Bypass valve opening pressure:4bar

Pollution holding capacity: ≥350g (under standard operating conditions and standard dust test conditions)

The filter in the wind power industry is a double-precision filter. When the pressure difference of the filter element is lower than 4bar, the bypass valve on the filter element is closed, and the lubricating oil is filtered through the 10μm filter element. When the pressure difference of the filter element is greater than 4bar, the bypass valve on the filter element is opened, and the oil only passes through 50μm coarse filtration. In any case, unfiltered oil does not enter the lubricated parts of the gearbox. A differential pressure transmitter is installed on the filter. When the filter element is blocked and the pressure difference reaches 3bar, the differential pressure transmitter will send a signal to remind the filter element to be replaced. The top of the filter is equipped with an exhaust pipe, which can remove air bubbles in the system at any time to prevent air bubbles from causing damage to the gearbox.

1. The oil filter element of wind turbine gearbox adopts double effect filter materials with pleated structure, high-efficiency glass fiber filter materials and stainless steel wire mesh filter materials. During normal operation, the oil is filtered and purified through glass fiber filter materials, and at low temperature, high viscosity or high pressure difference, it is filtered and purified through stainless steel wire mesh filter materials.

   2. The filter element is equipped with a special differential pressure valve to automatically switch the oil to pass through different filter materials under the set differential pressure, so as to ensure that the filter element will not be damaged under the high differential pressure.

   3. The resin consolidated high-efficiency glass fiber filter material has high pollution holding space and capacity, fixed pore structure, no migration and falling off of filter fiber, and the filtered and intercepted pollution particles will not be unloaded due to pressure difference and flow fluctuation.

   4. The glass fiber filter material has a variety of filtration precision to choose from, with fast interception and removal of contaminated particles and high efficiency.

   5. The upstream and downstream high-strength polyester supporting materials and the external winding belt structure of the filter element ensure the stability of the strength and filtering area of the filter element.