Wind power gear box lubricating system suitable for extreme condition

Abstract

A wind power gear box lubricating system suitable for an extreme condition comprises a main lubricating oil circulating cooling unit and an external circulating filtration and heating unit, wherein the main lubricating oil circulating cooling unit comprises a main lubricating unit variable-frequency motor, a screw pump, a mechanical pump, a temperature control valve, a main lubricating unit filtration system, an air cooling machine and a sensor, and the external circulating filtration and heating unit comprises an external circulating variable-frequency motor, a screw pump, an on-line cleanliness detector, an electromagnetic directional valve, an external fine filter, an external heater and a flow switch. The wind power gear box lubricating system has the advantages that due to the fact that the variable-frequency motors and the screw pumps are arranged, stable starting at a dead slow speed and under the low-temperature condition can be achieved, shutting down at a gradually decreasing speed can be achieved, automatic following under different conditions can be achieved, instant pressure impact generated when an electric oil pump starts at the low temperature can be effectively reduced, and the failure rate of the lubricating system can be lowered, the application range is expanded, the system response is more rapid, the adaptability, the generality, the safety and the reliability of the system are enhanced, energy is saved, the self-cleaning capacity of the lubricating system is improved, and the service life of oil products is prolonged.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to the lubrication technology of a wind power generation gearbox system. Background technique [0002] Due to the different installation locations of wind power generation equipment, the working environment temperature varies greatly, and the ambient temperature can reach -40°C when working at low temperature. Under the low temperature working environment, the oil temperature is usually around -10°C when the wind power gearbox lubrication system is started, and the viscosity of the lubricating oil is very high at this temperature. In the prior art, the lubrication system of the wind power gearbox is driven by a two-speed asynchronous motor to run a gear pump, and the minimum speed of the two-speed asynchronous motor is 750r / min. The deficiency of the prior art is: even if it starts at a low speed, the pressure at the moment of starting is very high, usuall...

AI Technical Summary

Problems solved by technology

The deficiency of the prior art is: even if it starts at a low speed, the pressure at the moment of starting is very high, usually up to about 2MPa. Such an instantaneous pressure shock will bring harm to the lubrication system, increase the failure rate of the system, and reduce the lubrication efficiency. System Lifetime and Reliability

[0003] At the same time, the prior art wind power gearbox lubrication system does not have the function of online monitoring of the cleanliness and water content of the working medium, and the moisture content of the working medium exceeds the standard or even the oil deteriorates, which will cause the gearbox bearings and teeth to rust, and the lubrication function will be destroyed. The wear and tear is intensified, and it is very easy to cause high temperature alarm shutdown or even the scrapping of the gearbox

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