Wind Turbine Oil Filter Housing for Spill-Free Replacement
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Solution Overview
Problem
The frequent need to replace oil filters in wind turbine gearboxes results in downtime, potential lubricant spills, handling hazards, and increased maintenance time, as existing systems require draining and refilling lubricant during filter changes.
Innovation Solution
A filter system with a pressurizing device that allows for the replacement of oil filters without spilling lubricant by using a compensation duct to equalize pressure and prevent liquid flow, enabling the use of pressurized gas to evacuate lubricant from the filter volume, and reconnecting the system to re-introduce lubricant post-filter change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil filter is replaced frequently to maintain lubrication quality, then reliability of lubrication system is improved, but downtime of wind turbine increases and maintenance time increases
Solution Approach 1:
The filter housing is divided into two separable parts: a stationary housing portion remaining in the lubrication system and a removable cap portion containing the oil filter. This segmentation allows the filter to be replaced independently without draining the entire lubrication system or shutting down the wind turbine, thus maintaining reliability while minimizing downtime.
Solution Approach 2:
The cap portion with the oil filter is pre-assembled as a complete unit that can be detached and replaced quickly. The filter housing design allows the cap portion to be removed and a new filter installed in the stationary housing portion without requiring preliminary draining of lubricant or complex disassembly, enabling rapid filter replacement and reducing maintenance time.
2Ease of manufacture
If traditional filter replacement method is used requiring draining and refilling lubricant, then complete filter replacement is achieved, but lubricant spills occur and handling hazards increase
Solution Approach 1:
The cap portion containing the oil filter is extracted as a separate removable unit from the stationary housing portion. This extraction allows the filter to be replaced without draining the lubricant from the main lubrication system, eliminating lubricant spills and associated handling hazards while maintaining ease of filter replacement.
Solution Approach 2:
The removable cap portion acts as an intermediary that isolates the filter replacement operation from the main lubrication system. By confining the filter change to the detached cap portion, lubricant remains contained in the stationary housing portion, preventing spills and reducing handling hazards while allowing complete filter replacement.
3Productivity
If filter housing volume is increased to reduce filter replacement frequency, then maintenance time is reduced, but device complexity and initial maintenance burden increase
Solution Approach 1:
The filter housing is segmented into a stationary housing portion and a removable cap portion. This segmentation allows the system to maintain a reasonable filter housing volume while enabling rapid filter replacement through the removable cap, improving maintenance efficiency without requiring an excessively large housing that would increase device complexity.
Solution Approach 2:
The cap portion is designed to be dynamically removable and reattachable to the stationary housing portion. This dynamic design allows the filter to be accessed and replaced quickly without permanent enclosure, improving maintenance efficiency while keeping the overall system compact and manageable in terms of complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces maintenance time, minimizes lubricant loss and handling risks, and decreases downtime, thereby enhancing sustainability and energy production efficiency in wind turbines.
Implementation Method 1
provision of pressurized gas by the pressurizing device into the filter volume for discharging the lubricant from the filter volume
Implementation Method 2
using a compensation duct to equalize pressure and prevent liquid flow
Data Source
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AI summary
The present disclosure is directed to a filter system for a wind turbine, comprising at least a filter device having a filter housing with a volume portion and a cap portion, both defining a filter volume for receiving the oil filter. The filter housing is equipped with an inlet port, an outlet port and a pressure port. The filter system further comprises a pressurizing device having an interface port, and supply means for providing pressurized gas via the interface port, preferably into the filter housing of the filter device. The pressurizing device is configured for being connectable to the pressure port, preferably via a compensation duct. Furthermore, a method is disclosed, wherein the pressurizing device is connected to the filter housing, lubricant is discharged by applying pressurized gas into the filter volume, the cap portion is removed and an oil filter is subsequently replaced.