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| Xinjiang's Dabancheng wind energy and wind power of the existing network of 14 wind turbine units, of which 13 are equipped with a hydraulic braking system, running through over the past year, we found that 60% of the wind turbine from the failure of the hydraulic system, but As long as the operation of a good grasp of the maintenance work can be done on prevention, at the same time have a better method to maintain even if a fault can be found in a timely manner and dealt with as soon as possible, rule out the possibility that this greatly reduces the wind turbine downtime and improve A wind turbine operating efficiency. The following wind to hydraulic braking systems and the maintenance of the structure of the method Principles, introduced as follows: First, the brake body 150kW wind turbine from the main body of the hydraulic brake system, brake disc, when a sharp damping board consists of three parts, which were part of the main components and their role is as follows Integration into tip-damping plate and brake disc in two parts. We are starting from the stands, and two of their process works. (1) start-up boot When the start-up command control system (can be automatic and manual), a hydraulic motor starting immediately, pressure from the "P" I entered the combination valve. Combination valve may be on the map around the center line into two parts, one part of the left for some of the pressure on the tip; right for the part of the disc brake pressure to provide. At the same time start the motor, 10, 11-valve solenoid valve in the body are charged in the hydraulic map now that the electromagnetic valve of the state of the state are not charged if the state is now charged with the other hand, such as the solenoid valve 10 and 11 are not charged When the state of access roads are now charged after a closed state. By the time-p-entered the mouth of the hydraulic oil can only be along the 6.2-way valve into the right part of the pressure when the value reached by the pressure switch setting 7 of 10.3MPa (103bar), lO valve is opened, the pressure began to enter the leaf Sharp, so that leaves damping plate to recover, at the same time will also open the solenoid valve 12 to close the solenoid valve 13, so that the disc inside the gate of the discharge pressure and do a good job of starting to prepare. When the tip away, the mission gates are set to be released at the same time, when the pressure switch 15 of the pressure to reach 7 MPa (70bar), the hydraulic motor to stop spinning. Figure in the 17th and 18th in the two components are storage tank pressure, the use of compressed gas storage to the oil pressure in the energy to supplement the operation in the process of hand by the tip sheet resistance and leakage of the disc brake to reduce the hydraulic The frequency of start-up motor. This is the start of the process base. (2) parking brake When the wind turbine control system shutdown command is issued, the solenoid valve immediately charged 10, 11, 10 closed solenoid valve, solenoid valve to open 11, 12, 13 so that the solenoid valve and then lost power, that opened 13, closed 12, resulting in the tip Damping plate was pop, also moves the brake disc brake so that the wind turbine to a smooth shutdown. 2. Performance Analysis From the structural design, wind turbine that the braking torque from the two, the first tip brake damping, and the other is the brake disc brake brake, brake torque in the low-speed shaft, so that in the braking process Gearbox on the impact small. In addition there are the following characteristics; (1) Smooth braking process, due to the small vibration in the process of braking by the uniform distribution of the first three leaves of the very tip damping action to reduce speed, then brake disc brakes, brake making process has become more stable. (2) brake agency independent of each other The braking system of two sets of brake is independent of each other, that is not due to a brake system failure caused by another lost the ability to work, for example, when the hydraulic system failure, the pressure does not build up and brake disc can not be normal Braking, damping tip sheet is just as pressure loss was pop, played a role in damping the brake, so that the enhanced braking system reliability. (C) a stall protection agency The braking system with roots in the leaves of a centrifugal pressure on the cylinder when the wind turbine and will be out of control for Speed, speed will exceed the pre-set value, in the role of the centrifugal force, made up the pressure to the pressure switch setting of 14, 14 actions have been opened for Speed, 16-valve was connected to security, tip-damping plate in the discharge pressure was, damping plate pop, a start-up protection. Third, the gateway system maintenance methods 1. General maintenance (1) regular inspection of hydraulic oil in the oil paintings or wind generators warehouse spaces are provided for in the oil-online, or else should be added in a timely manner, can check the time as a quarterly, and visual equipment. (2) Every time a finished oil, slowly release the brake hydraulic cylinder exhaust on the screws, so as not to have a set of gas pressure in the fuel tanks of the impact of the establishment, and then on tight. (8) regular inspection of the pressure switch 7, 15 whether or not the pressure in the setting, if setting shift took place immediately re-tuning and should be setting the value of locking screw lock. (4) regular inspection of all hydraulic system pressure on the joint of the pipeline is loosening as a result of leakage and such confusion should be found to move by hand tightening. (5) Check the brake wear, to replace the need for new film. General gateway to on-chip special grinding material left over from 2 ~ 4 mm for the use of limit. Replacement of brake should check with the brake disk space between whether it is appropriate, such as inappropriate by aircraft brake pads plus a fixed screw on the way to adjust the gap to 2 mm for the general good. (6) the process of braking test of time in line with the normal time, around 4 s in general. (7) found that when the hydraulic system failure, should first check whether the lack of hydraulic motor phase. 2. Brake system maintenance should be paid attention to the issue of (1) reduce the downtime is the time to protect high-performance wind turbine operation of the key, and the brake system failure rates are relatively high and therefore should be dealt with personnel to run the system used by the gates of the special tools such as the transfer of pressure within the six-party switches by hand to move, Driver , The hydraulic system map, tightening pressure on the effective opening of the hand to move, and so concentrated in a bag, ready at any time to do a good job of maintenance. (2) of hydraulic oil cleanliness is very important because any tiny dust will be to the normal operation of the hydraulic system or an impact on life, for our hydraulic system set up two special oil filter . In addition, the Oil Terminal and mouth filling, oiler tank in and out of the mouth usually have to add cover or cloth to prevent dust into the hydraulic system. (3) the maintenance of each post will be wind turbine or ball bearings and hydraulic valves pressure valve on the pipeline joints and wipe the joints in order to observe the above-mentioned position in the future if there is leakage. (4) seriously records each of the wind turbine running log, fill out the force of Typhoon aircraft maintenance report card in order to safeguard the long-term wind turbine wind turbine have to run in the history of the situation, in order to provide a basis for troubleshooting. Fourth, analysis of the accident case Accident phenomenon September 2, 1990, I wind field, B5 fails to work, pre-show type of fault for the hydraulic system failure, the inspection found that the security valve for Speed 16 Shuaichu be reset after the start-up has been repeated many times Shuaichu, This tip as a result of hydraulic oil valve 16 Chinese workers grassland area of 100 mu, a spray irrigation, irrigation pipes, irrigation pilot three types of irrigation technology, the irrigation quota of up to 150m.ˮ. Electricity in about 2.5M_W. H, to meet the basic needs of the grass water requirements of the entire pasture fertility of soil moisture during the period in the appropriate range, in 1990 per mu yield of alfalfa grass up to 550kg, Elymus output up 900kg. The irrigation pump power 5.5kW, power machine for the 220V DC motor. Load plus the loss of up to 7 kW. In order to repair as well as the need to take full advantage of the extra period Sheng wind energy, wind power has set up 8 kW of back-up machine, which greatly improved the power supply to ensure that the degree. Wind energy in the year of distribution is very uneven, dry winds occur when the period of more than two days in a row without an effective wind speed, we set up a diesel power generation system of compensation, it can be out for alternating current, but also to recharge batteries in order to Protection from damage to the battery. 5. People and livestock water supply system Water supply for people and livestock through the use of wind power to pump water for irrigation water into the towers, and then to plastic water supply pipeline to the fixed point of water supply. The system will greatly facilitate the masses and changed the draft in the past by car and Latin America. Power supply system each year, about 600kW h or so. The pilot study was not all smooth sailing, the main problem is the reliability wind turbines poor excitation function of poor conditioning. Such as: wind turbine generators before and after the emergence of several off-axis, the driving gear of serious wear and tear, the governor stressed to the poor performance, often generating rectifier diode breakdown, but also undermine the individual components, such as accidents, so that was difficult for the entire wind power station Into normal operation. After the adoption of continuous improvement to improve, in particular the past two years, reached a basic stable and reliable operation of the situation. The system has played a practical functions. Our pilot study so that the herdsmen were greatly opened horizons, who herdsmen points on the lights, watch television, listen to a tape recorders, the use of washing machines, electric irons, the school's students on the Wanzi Xi, a family grass Coulomb Of irrigation water, they were very pleased. At the same time, wind power development in pastoral areas to set an example. Of course, we also work a lot of inadequacies, in particular some bearing on the economic benefits of the use of wind energy as a whole, but also research to be further studied. At present, we are fully sum up for future promotion and improvement of testing and to provide a theoretical basis. | ||
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