Hydraulic variable pitch technology full analysis (2)
In the stormy typhoon season, the safety and stability of wind power equipment is of Paramount importance. Among many wind power variable pitch technologies, hydraulic variable pitch has become the patron saint of typhoon weather due to its excellent performance and reliability. Today, we will analyze in detail the advantages of hydraulic variable pitch in the process of anti-typhoon.
1. Low failure rate, stable, and reliable
In extreme weather conditions such as typhoons, wind power equipment needs to withstand great tests. With its low failure rate and high stability, the hydraulic variable pitch system provides a solid backing for wind power equipment. Even in the case of typhoons or other emergency failures, the hydraulic variable pitch can ensure smooth feathering action and effectively avoid safety accidents caused by variable pitch failures.
2. Big output, quick response
When a typhoon hits suddenly, wind power equipment needs to respond quickly to protect itself. With its powerful output and excellent response characteristics, the hydraulic variable pitch system can emit huge energy in a very short time to ensure that the blade can complete the rewind protection action under heavy load, and effectively avoid the occurrence of speeding accidents.
3. No backup power, no worries
In typhoon weather, the power supply can be seriously affected. However, hydraulic variable pitch systems do not rely on backup power for feathering operation. It relies on the accumulator to push the hydraulic cylinder for feathering, which ensures the safe operation of the unit in the case of power loss. Compared with batteries or ultracapacitors, accumulators have better safety, reliability, and longevity.
4. Good cushioning reduces load
The hydraulic variable pitch system uses the hydraulic chamber to push the blade for variable pitch operation, which has a good buffer. In the case of a sudden shutdown, it can greatly reduce the load of the whole machine, effectively avoiding excessive load on the whole unit when a typhoon or other emergency occurs, so as to protect the tower barrel and blade from damage.
5. Self-locking mechanism to prevent overspeed
The hydraulic variable pitch system is equipped with a blade bearing self-locking mechanism (hydraulic mechanical lock), which is an innovative design to play a great role in emergency failure or typhoon weather. It ensures that the blade can only turn in the paddle direction and can lock the blade in the paddle position. In this way, even if the typhoon is more violent, it can not blow the locked blade back to the windward position, thus avoiding the occurrence of wind wheel speeding.
In short, the hydraulic variable pitch system shows five advantages in the process of typhoon resistance with its excellent performance and reliability. It not only ensures the safe and stable operation of wind power equipment, but also greatly reduces the failure rate and maintenance costs. In the future development of wind power, the hydraulic variable pitch system will continue to play an important role, bringing more safe, efficient, and reliable technical support to the wind power industry.
The advantages of hydraulic variable pitch for high-power units in the future
The hydraulic variable pitch system has many obvious advantages for future high power units, which make it have a wide application prospect in the field of wind power generation.
Cylinder synchronization is excellent, output balance without concern
Most of the high-power units use double hydraulic cylinders to drive one blade, and the hydraulic variable pitch system shows its excellent cylinder synchronization in the wind turbine because of its uniqueness, effectively avoiding the problem of uneven hydraulic cylinder output.
Simple expansion
When it is necessary to increase the capacity of the wind turbine or accommodate larger fan blades, the hydraulic propeller system can be expanded by increasing the number of motors, accumulators, and cylinder travel, while the cost increase is relatively small.
Piston accumulator guarantee for emergency feathering
Emergency feathering is achieved by the piston accumulator, and there is no problem of backup power failure. The design of the piston accumulator is simple and easy to maintain. It has stable and reliable operation, long service life, and low maintenance cost.
Millisecond response, independent variable pitch, cost reduction
Millisecond response time to perform the pitch change, more suitable for independent pitch change, reduces the cost of the machine.
Independent pitch change
Independent pitch change is a kind of wind turbine pitch change technology, which allows different pitch instructions to be issued according to the actual load of each blade to control the change of pitch Angle, so that each blade can obtain different target positions. This technology helps to reduce the unbalanced fatigue load on the impeller face, thereby regulating the fan speed and fan power output, and improving the overall efficiency and reliability.
Advantages of independent pitch control technology include:
Optimize the unit structure: By independently controlling the pitch Angle of each blade, the fatigue load of each component of the unit can be reduced, helping the wind turbine to achieve a lightweight, large-scale, and more flexible structural design.
Improve wind energy utilization: In low wind speed areas, the use of lightweight wind turbines can improve the efficiency of wind energy utilization in low wind speed areas.
Improve the operational life of the unit: improve the load of each component of the unit and reduce the operation and maintenance cost of the wind turbine.
Hydraulic variable pitch advantage
Compared with the traditional unified variable pitch system, the adjustment frequency of the independent variable pitch is higher, and the response speed and precision of the system are also higher.
Due to the frequent adjustment of pitch Angle in the independent pitch system, the bearing is subjected to greater load and friction, which may cause the bearing tooth surface to wear more easily.
There is a need to achieve a no-gap fit between the two ends of the hydraulic cylinder and the drive shaft, which can reduce friction and vibration and improve the reliability and life of the system.
These advantages make the hydraulic variable pitch system an ideal choice for high-power units, which helps to promote the continuous development and progress of wind power generation technology.
