CN102562460A - Undamped hydraulic yaw system based on pressure detection and control method of undamped hydraulic yaw system - Google Patents
Undamped hydraulic yaw system based on pressure detection and control method of undamped hydraulic yaw system Download PDFInfo
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Abstract
The invention relates to an undamped hydraulic yaw system based on pressure detection and a control method of the undamped hydraulic yaw in the field of wind power generation technology. The undamped hydraulic yaw system comprises a motor, an oil pump, a relief valve, an oil tank, a pressure relay, an energy accumulator, a safety valve group of the energy accumulator, a proportional valve, a single-way valve, a low-speed high-torque hydraulic motor, a yaw gear, a presser sensor, a yaw coder, a cabin inner gearing ring, a yaw counter and an anemoscope. The control method of the undamped hydraulic yaw system comprises the following steps: using a position detection method to realize the function of fast aiming the wind direction during the yawing; using a pressure detection method to realize the function of precisely aiming the wind direction; and at the same time, not introducing damp. The undamped hydraulic yaw system provided by the invention is characterized in that: the detection error of the anemoscope can be prevented from influencing the yaw system based on the accurate wind-direction aiming function for pressure detection, the damped yaw is canceled during the yawing to reduce the frictional abrasion caused by braking, so that the power waste caused by the traditional damped yaw is avoided.
Description
Technical field
The present invention relates to be applicable to the Large-scale Wind Turbines of MW class, particularly a kind of the undamped hydraulic yawing system and the controlling method of technical field of wind power generation based on Pressure testing.
Background technique
Large-scale Wind Turbines generally is made up of parts such as wind wheel, step-up gear, generator, yaw device, transmission system, pulp distance varying mechanism, control system, pylons.Wherein, Yaw system is the requisite constituent element of wind power generating set; Its role is to match with the control system of wind power generating set, when the direction of wind vector changed, the wind wheel of wind power generating set can be aimed at wind direction in quick and stable ground; Make it be in state down with the wind all the time, improve the generating efficiency of wind power generating set.
The function of yaw system comprises: automatic accurate to wind in available wind speed range; Can 90 in non-available wind speed range the degree crosswind; Under the situation that the Continuous Tracking wind direction possibly cause cable to twine, realize automatic cable-releasing etc.Yaw system can make the wind power generating set running steadily reliable, efficiently utilizes wind energy.
Yaw system can be divided into active yawing system and passive yawing system.Wherein, The passive yawing system does not need to establish deviation drive device in addition, but utilizes devices such as mechanical mechanism or tail vane, under wind action, makes impeller aim at wind direction all the time; This construction cost is low, manufacturing is easy to maintenance, but generally only is suitable for the non-small-sized wind power generator group that is incorporated into the power networks; The active yawing system is provided with deviation drive device, according to the deviation signal of wind direction and wind wheel plane normal direction, makes the cabin rotate respective angles around the pylon shaft axis jointly together with wind wheel through driving mechanism, realizes the wind function; Though active yawing system complex structure, with respect to the passive yawing system controllable process of facining the wind, the large-scale wind power generator incorporated in power network group of existing horizontal axis all is provided with the active yawing system.
The deviation drive device of active yawing system, major part are to utilize yaw motor, slow down through gear reducer, obtain suitable output speed and moment of torsion, drive the cabin and accomplish the driftage function; Because yawing velocity is very slow, the retarder velocity ratio is very big usually, about 1:1000, therefore needs to adopt multi-stage speed reducer, is generally combined by two to three grades of parallel axes helical gear reducers and two-stage epicyclic reduction.The active yawing system also can adopt fluid pressure drive device; Present fluid pressure drive device mainly contains dual mode: a kind of driving mode is to utilize two Driven by Hydraulic Cylinder that are wrapped in the wire rope two ends on the pivoting support; To-and-fro motion through the control oil hydraulic cylinder; Realize driftage, slack rope, return the several motions of cylinder, accomplish the driftage process; In order to reduce the volume of deviation drive device, also can adopt oil hydraulic motor to pass through the mode that retarder drives.
All adopt the damping yawing mode in the above-mentioned yaw system running, increase braking clamp place's fretting wear and produce more high-power waste.Simultaneously, because the direction real-time change of natural wind, need constantly to rotate the cabin and make wind wheel front wind-engaging all the time; With the capture rate of increase wind energy, but, can not accurately detect wind direction because the testing precision of anemoclinograph exists than mistake; Cause yaw system to be difficult to the accurately pivotal position in control cabin; This has not only reduced the maximum capture rate of wind energy, and unbalance stress when making the wind power generating set blade operation of symmetry simultaneously causes unit vibration and wind wheel blade tired; Detect the adverse effect of error for overcoming anemoclinograph, need in less control angle (in general 15 degree) to introduce Poewr control method yaw system, the complex design control strategy realize the cabin accurately to wind, increase system design difficulty.
Summary of the invention
The present invention is directed to the deficiency that wind power generating set tradition active yawing system exists, propose a kind of undamped hydraulic yawing system based on Pressure testing.
Said hydraulic yawing system constitutes by meshing gear ring, driftage counter and anemoclinograph in motor, oil pump, relief valve, fuel tank, one-way valve, pressure relay, accumulator and safety valve group thereof, proportional reversing valve, one-way valve, relief valve, low speed high torque hydraulic motor, yaw gear, pressure transducer, driftage encoder, the cabin;
Said driven by motor oil pump rotates to the hydraulic yawing system fuel feeding; A be linked in sequence end of relief valve, one-way valve, accumulator, pressure relay and proportional reversing valve of oil pump outlet end; The accumulator the other end is connected with accumulator safety valve group; Two output terminals of proportional reversing valve are connected with the low speed high torque hydraulic motor two ends, and the low speed high torque hydraulic motor two ends are connected with an end of two groups of one-way valves and relief valve simultaneously, and the other end of one-way valve and relief valve is connected with fuel tank; The low speed high torque hydraulic motor output shaft is connected with yaw gear; The engagement gear ring is meshed in yaw gear and the cabin; Engagement gear ring place is equipped with driftage encoder and driftage counter in the cabin; Anemoclinograph is installed on the cabin;
Said oil pump outlet is communicated with accumulator through one-way valve; Accumulator is connected with accumulator safety valve group, and accumulator is that yaw system provides auxiliary power source, can make oil pump be in the discontinuous operation state, and both energy saving reduced the device fabrication cost, guaranteed the normal operation of yaw system under short of electricity and powering-off state again; Accumulator safety valve group can guarantee the safe handling of accumulator, prevents by temperature and pressure to change the accident that causes; Electric motor starting with stop, by the control of the pressure relay of accumulator export pipeline, realize that oil pump is an accumulator repairing function;
Said low speed high torque hydraulic motor is used to drive yaw gear, provides enough torques to promote engagement gear ring rotation in the cabin, rotates together with wind wheel thereby drive the cabin; Four low speed high torque hydraulic motors are evenly arranged along engagement gear ring circumference in the cabin, can guarantee that the engagement gear ring obtains symmetrical driving moment in the cabin, avoid the unbalance loading phenomenon;
Said low speed high torque hydraulic motor is imported and exported pipeline and is all connected relief valve and one-way valve; Relief valve plays the safety valve effect, prevents to cause that because of loine pressure is too high hydraulic element and conduit failure, one-way valve are used to prevent that the fluid suction of motor rotary course mesolow chamber is empty;
Said driftage encoder is used for the machines freight space and puts situation, and the wind direction signals that its testing signal and anemoclinograph detect feeds back to fast in the wind controller jointly, realizes fast to the wind function through the control ratio selector valve; Said pressure transducer detects the oil liquid pressure signal of oil hydraulic motor two lateral lines in real time; And detected pressure signal fed back to accurately in the wind controller; Replenish fluid through the control ratio selector valve to the hyperbaric chamber of low speed high torque hydraulic motor; Whether the pressure difference that detects low speed high torque hydraulic motor two lateral lines according to pressure transducer again is in allowed band; Thereby whether the decision proportional reversing valve is realized accurately to the wind function, to reach the effect of maximum use wind energy once more to the additional fluid of the hyperbaric chamber of low speed high torque hydraulic motor;
Said driftage counter is used for the rotating cycle of machines shipping bill direction, when cabin folk prescription during to rotation 2.5 circles (900 degree), provides the trigger signal of untying the mooring rope, and yaw system is accomplished the function of untying the mooring rope.
The present invention also provides a kind of controlling method of the undamped hydraulic yawing system based on Pressure testing, and this method may further comprise the steps:
Under the prerequisite that satisfies the yaw system starting condition; The wind wheel that the driftage encoder detects compares towards the wind direction signals of signal and anemoclinograph detection; When deviation signal value (threshold value is made as 15 degree) greater than the time to wind diverter switch threshold value; Deviation signal is controlled the opening degree of 3-position 4-way proportional reversing valve through fast to after wind controller, damping link, the amplitude limit link, thereby control gets into the fluid flow of oil hydraulic motor; Rotate together with wind wheel through oil hydraulic motor rotating band engine compartment, realize fast to the wind function;
The rotating cycle of driftage counter machines shipping bill direction, when the cabin folk prescription when rotation 2.5 circles (900 degree), provide the trigger signal of untying the mooring rope, yaw system is accomplished the function of untying the mooring rope;
Under the prerequisite that satisfies the yaw system starting condition; When above-mentioned deviation signal value less than to wind diverter switch threshold value the time; Because the existence of deviation can cause wind wheel influenced by lateral airflow; The driftage torsion that impeller produces shows as the periodic pressure surge of fluid in oil hydraulic motor two lateral lines, and pressure transducer detects both sides loine pressure difference and feeds back to accurately in the wind controller, after damping link, amplitude limit link; The opening degree of control 3-position 4-way proportional reversing valve replenishes certain fluid to the oil hydraulic motor hyperbaric chamber; Utilize pressure transducer to detect oil hydraulic motor both sides loine pressure difference whether in allowed band, confirm that whether proportional reversing valve is once more to the repairing of oil hydraulic motor hyperbaric chamber; When the fluctuation of the periodic pressure of fluid in the pipeline is reduced in the particular range, accomplish accurately to the wind function.
Because hydraulic system has characteristics such as flexibility is good, speed of response is fast; The design of damping link in electric control system, is simulated the damping torque in traditional driftage process, can improve the hydraulic yawing system damping; Make the hydraulic yawing system running steadily, save the damping driftage of traditional wind group.Simultaneously, the flexibility of hydraulic system can be alleviated wind direction in the driftage process and change the impact to yaw gear.
The present invention compared with prior art has the following advantages:
1, when wind wheel towards the deviation of signal and wind direction signals hour, control the cabin rotation angle through the pressure difference that detects yaw system oil hydraulic motor two lateral lines, realize yaw system accurately to the wind function.With respect to traditional yaw system, can avoid of the influence of the detection error of anemoclinograph to yaw system, do not introduce complicated power control strategy simultaneously again.
2, the damping link is designed in electric control system, simulate the damping torque in traditional driftage process, can improve the hydraulic yawing system damping, reduce the friction wear at braking clamp place, the power dissipation of avoiding traditional damping driftage to produce.Simultaneously, the flexibility of hydraulic system can be alleviated wind direction in the driftage process and change the impact to yaw gear.
Description of drawings
Fig. 1 is a theory diagram of the present invention
Fig. 2 is that the present invention controls block diagram
Among the figure: 1, motor, 2, oil pump, 3, relief valve, 4, fuel tank, 5, one-way valve; 6, pressure relay, 7, accumulator, 8, accumulator safety valve group, 9, proportional reversing valve, 10, one-way valve; 11, relief valve, 12, low speed high torque hydraulic motor, 13, yaw gear, 14, pressure transducer; 15, driftage encoder, 16, engagement gear ring in the cabin, 17, the counter of going off course, 18, anemoclinograph.
Embodiment
For ease of understanding concrete principle of the present invention and controlling method, specify the specific embodiment of native system through accompanying drawing.
As shown in Figure 1, engagement gear ring 16 in motor 1, oil pump 2, relief valve 3, fuel tank 4, one-way valve 5, pressure relay 6, accumulator 7, accumulator safety valve group 8, proportional reversing valve 9, one-way valve 10, relief valve 11, low speed high torque hydraulic motor 12, yaw gear 13, pressure transducer 14, driftage encoder 15, the cabin, go off course counter 17, anemoclinograph 18 and be communicated in oil pump and said oil hydraulic motor between oil pipe L1, L2.
Said motor 1 drives oil pump 2 and rotates to the hydraulic yawing system fuel feeding; A be linked in sequence end of relief valve 3, one-way valve 5, accumulator 7, pressure relay 6 and proportional reversing valve 9 of oil pump 2 outlet end; Accumulator 7 the other ends are connected with accumulator safety valve group 8; Two output terminals of proportional reversing valve 9 are connected with low speed high torque hydraulic motor 12 two ends, and low speed high torque hydraulic motor 12 two ends are connected with an end of two groups of one-way valves 10 and relief valve 11 simultaneously, and the other end of one-way valve 10 and relief valve 11 is connected with fuel tank 4; Low speed high torque hydraulic motor 12 output shafts are connected with yaw gear 13; Engagement gear ring 16 is meshed in yaw gear 13 and the cabin; Engagement gear ring 16 places are equipped with driftage encoder 15 and driftage counter 17 in the cabin; Anemoclinograph 18 is installed on the cabin;
Said oil hydraulic motor 12 provides enough torques to promote engagement gear ring 16 rotations in the cabin; Thereby driving the cabin rotates together with wind wheel; Adopt 4 oil hydraulic motors evenly to arrange, can guarantee that engagement gear ring 16 obtains symmetrical driving moment in the cabin, avoid the unbalance loading phenomenon along engagement gear ring circumference in the cabin; Said accumulator 7 is connected with accumulator safety valve group 8; Accumulator 7 can make oil pump 2 be in discontinuous operation state, both energy saving for yaw system provides auxiliary power source; Reduce the device fabrication cost, guarantee the normal operation of yaw system under short of electricity and powering-off state again; Accumulator safety valve group 8 can guarantee the safe handling of accumulator 7, prevents by temperature and pressure to change the accident that causes; Motor 1 starts and stops, and pressure relay 6 controls by accumulator 7 export pipelines realize that oil pump 2 is accumulator 7 repairing functions; Said oil hydraulic motor is imported and exported pipeline L1 and all is connected relief valve 11 and one-way valve 10 with L2; Relief valve 11 plays the safety valve effect; Prevent to cause that because of pipeline inner pressure is too high hydraulic element and conduit failure, one-way valve 10 are used to prevent that the fluid suction of motor rotary course mesolow chamber is empty.
The wind wheel that said driftage encoder 15 detects compares towards the wind direction signals of signal and anemoclinograph 18 detections; When the deviation signal value greater than to wind diverter switch threshold value the time; Deviation signal is controlled the opening degree of 3-position 4-way proportional reversing valve 9 through fast to after wind controller, damping link, the amplitude limit link, thereby control gets into the fluid flow of oil hydraulic motor 12; Rotate together with wind wheel through oil hydraulic motor 12 rotating band engine compartment, realize fast to the wind function; When the deviation signal value less than to wind diverter switch threshold value the time; Because the existence of deviation can cause wind wheel influenced by lateral airflow; The driftage torsion that impeller produces shows as the periodic pressure surge of fluid in the oil hydraulic motor 12 two ends pipelines, and pressure transducer 14 signal piping L1 and pipeline L2 pressure difference also feed back to accurately in the wind controller, after damping link, amplitude limit link; The opening degree of control 3-position 4-way proportional reversing valve 9 replenishes certain fluid to oil hydraulic motor 12 hyperbaric chambers; Utilize pressure transducer 14 to detect oil hydraulic motors 12 both sides loine pressure differences whether in allowed band, confirm that whether proportional reversing valve 9 is once more to the repairing of oil hydraulic motor hyperbaric chamber; When the fluctuation of the periodic pressure of fluid in the pipeline is reduced in the particular range, accomplish accurately to the wind function.
The rotating cycle of said driftage counter 17 machines shipping bill directions when cabin folk prescription during to rotation 2.5 circles (900 degree), provides the trigger signal of untying the mooring rope, and yaw system is accomplished the function of untying the mooring rope.
The concrete working principle that the present invention is directed to different driftage operating modes is following:
(1) starts
When the wind velocity signal of anemoclinograph 18 detections reached wind power generating set incision wind speed, the wind power generating set hydraulic yawing system started; The wind wheel that driftage encoder 15 detects compares towards the wind direction signals of signal and anemoclinograph 18 detections, utilizes wind direction signals Deviation Control proportional reversing valve 9, gets into fast to the wind operating mode.
(2) fast to wind
The wind wheel that driftage encoder 15 detects compares towards the wind direction signals of signal and anemoclinograph 18 detections; When the deviation signal value greater than to wind diverter switch threshold value the time; Deviation signal is passed through fast to after wind controller, damping link, the amplitude limit link; The opening degree of control 3-position 4-way proportional reversing valve 9; Accumulator 7 fluid get into chamber, oil hydraulic motor 12 left sides (right side) through proportional reversing valve 9, pipeline L1 (or L2), and right (left side) chamber of oil hydraulic motor fluid is through oil pipe L2 (or L1), and passing ratio selector valve 9 is got back to fuel tank 4; When the wind direction signals deviate that detects with anemoclinograph 18 when position, cabin that driftage encoder 15 detects reached in 15 degree, entering was accurately to the wind operating mode.
(3) accurately to wind
Because the testing precision of anemoclinograph 18 exists than mistake, can't accurately measure actual wind direction, thus introducing based on pressure testing method accurately to the wind function.The wind wheel that driftage encoder 15 detects compares towards the wind direction signals of signal and anemoclinograph 18 detections; When the deviation signal value less than to wind diverter switch threshold value the time; Because the existence of deviation can cause wind wheel influenced by lateral airflow, the driftage torsion that impeller produces shows as the periodic pressure surge of fluid in the pipeline of oil hydraulic motor two ends, and pressure transducer 14 signal piping L1 and pipeline L2 pressure difference also feed back to accurately in the wind controller; After damping link, amplitude limit link; The opening degree of control 3-position 4-way proportional reversing valve 9, accumulator 7 fluid get into oil hydraulic motor 12 hyperbaric chambers through proportional reversing valve 9, pipeline L1 (or L2), and oil hydraulic motor 12 low pressure chamber fluid are through oil pipe L2 (or L1); Passing ratio selector valve 9 is got back to fuel tank 4, realizes the quantitative repairing process of oil hydraulic motor 12 hyperbaric chambers; Utilize pressure transducer 15 to detect oil hydraulic motors 12 both sides loine pressure differences whether in allowed band, confirm that whether proportional reversing valve 9 is once more to oil hydraulic motor 12 hyperbaric chamber repairings; When the fluctuation of the periodic pressure of fluid in the pipeline is reduced in the particular range, accomplish accurately to the wind function.
(4) untie the mooring rope
The rotating cycle of driftage counter 17 machines shipping bill directions; When cabin folk prescription during to rotation 2.5 circles (900 degree); Provide the trigger signal of untying the mooring rope, the controller control ratio selector valve 9 that unties the mooring rope, accumulator 7 fluid get into chamber, oil hydraulic motor 12 left sides (right side) through proportional reversing valve 9, pipeline L1 (or L2); Chamber, oil hydraulic motor 12 right sides (left side) fluid is through oil pipe L2 (or L1), and passing ratio selector valve 9 is got back to fuel tank 4; Driftage encoder 15 machines freight spaces are put, and when initial position was got back in the cabin, yaw system was accomplished the function of untying the mooring rope.
(5) 90 degree crosswind functions
When anemoclinograph 18 measuring wind reach the wind power generating set cut-out wind speed; Controller control ratio selector valve 9; Accumulator 7 fluid get into chamber, oil hydraulic motor 12 left sides (right side) through proportional reversing valve 9, pipeline L1 (or L2); Chamber, oil hydraulic motor 12 right sides (left side) fluid is through oil pipe L2 (or L1), and passing ratio selector valve 9 is got back to fuel tank 4; Driftage encoder 15 machines freight spaces are put, and the wind direction signals that detects with anemoclinograph when the position, cabin differs 90 when spending, and 90 degree crosswind functions are accomplished, and get into the shutdown operating mode.
(6) shut down
In the above-mentioned operating mode, four low speed high torque hydraulic motors 12 are parallel with one another, evenly arrange, through engagement gear ring 16 in the cabin, provide enough torques to drive the cabin and rotate, thereby realize the closed loop control of position, cabin; Accumulator 7 provides the hydraulic pressure auxiliary power source for yaw system, and accumulator safety valve group 8 is used to prevent that Yin Wendu and oil liquid pressure from changing the accident that causes; Motor 1 starts and stops, and by the pressure relay control of accumulator 7 export pipelines, is embodied as the function of accumulator 7 repairings; Relief valve 11 plays the safety valve effect, prevents too high hydraulic element that cause of loine pressure and conduit failure; One-way valve 10 is used to prevent that the fluid suction of motor rotary course mesolow chamber is empty; Do not use the damping driftage in the driftage process, the flexibility of hydraulic system can be alleviated wind direction and change the impact to yaw gear 13 simultaneously.
As shown in Figure 2, specify controlling method of the present invention:
Under the prerequisite that satisfies the yaw system starting condition; The wind wheel that the driftage encoder detects compares towards the wind direction signals of signal and anemoclinograph detection; When the deviation signal value greater than to wind diverter switch threshold value (threshold value be made as 15 degree) time; Deviation signal control 3-position 4-way proportional reversing valve opening degree, thereby control gets into the fluid flow of oil hydraulic motor through fast to after wind controller, damping link, the amplitude limit link; Rotate together with wind wheel through oil hydraulic motor rotating band engine compartment, realize fast to the wind function;
Under the prerequisite that satisfies the yaw system starting condition; When above-mentioned deviation signal value less than to wind diverter switch threshold value the time; Because the existence of deviation can cause wind wheel influenced by lateral airflow; The driftage torsion that impeller produces shows as the periodic pressure surge of fluid in oil hydraulic motor two lateral lines, and pressure transducer detects both sides loine pressure difference and feeds back to accurately in the wind controller, after damping link, amplitude limit link; The opening degree of control 3-position 4-way proportional reversing valve replenishes certain fluid to the oil hydraulic motor hyperbaric chamber; Utilize pressure transducer to detect oil hydraulic motor both sides loine pressure difference whether in allowed band, confirm that whether proportional reversing valve is once more to the repairing of oil hydraulic motor hyperbaric chamber; When the fluctuation of the periodic pressure of fluid in the pipeline is reduced in the particular range, accomplish accurately to the wind function;
The rotating cycle of driftage counter machines shipping bill direction, when the cabin folk prescription when rotation 2.5 circles (900 degree), provide the trigger signal of untying the mooring rope, yaw system is accomplished the function of untying the mooring rope.
Because hydraulic system has characteristics such as flexibility is good, speed of response is fast; The design of damping link in electric control system, is simulated the damping torque in traditional driftage process, can improve the hydraulic yawing system damping; Make the hydraulic yawing system running steadily, save the damping driftage of conventional fan.Simultaneously, the flexibility of hydraulic system can be alleviated wind direction in the driftage process and change the impact to yaw gear.
Claims (3)
1. undamped hydraulic yawing system based on Pressure testing is characterized in that: it be by engagement gear ring (16), driftage counter (17) and anemoclinograph (18) in motor (1), oil pump (2), relief valve (3), fuel tank (4), one-way valve (5), pressure relay (6), accumulator (7) and safety valve group (8) thereof, proportional reversing valve (9), one-way valve (10), relief valve (11), low speed high torque hydraulic motor (12), yaw gear (13), pressure transducer (14), driftage encoder (15), the cabin and be communicated in oil pump and said oil hydraulic motor between oil pipe L1, L2 formation;
Said motor (1) drives oil pump (2) and rotates to the hydraulic yawing system fuel feeding; A be linked in sequence end of relief valve (3), one-way valve (5), accumulator (7), pressure relay (6) and proportional reversing valve (9) of oil pump (2) outlet end; Accumulator (7) the other end is connected with accumulator safety valve group (8); Two output terminals of proportional reversing valve (9) are connected with low speed high torque hydraulic motor (12) two ends; Low speed high torque hydraulic motor (12) two ends are connected with the end of two groups of one-way valves (10) with relief valve (11) simultaneously, and the other end of one-way valve (10) and relief valve (11) is connected with fuel tank (4); Low speed high torque hydraulic motor (12) output shaft is connected with yaw gear (13); Engagement gear ring (16) is meshed in yaw gear (13) and the cabin; Engagement gear ring (16) locates to be equipped with driftage encoder (15) and driftage counter (17) in the cabin; Anemoclinograph (18) is installed on the cabin;
Said oil pump (2) outlet is communicated with accumulator (7) through one-way valve (5); Accumulator (7) is connected with accumulator safety valve group (8); Accumulator (7) can make oil pump (2) be in discontinuous operation state, both energy saving for yaw system provides auxiliary power source; Reduce the device fabrication cost, guarantee the normal operation of yaw system under short of electricity and powering-off state again; Accumulator safety valve group (8) can guarantee the safe handling of accumulator (7), prevents by temperature and pressure to change the accident that causes; Motor (1) starts and stops, and pressure relay (6) control by accumulator (7) export pipeline realizes that oil pump (2) is accumulator (a 7) repairing function;
Said low speed high torque hydraulic motor (12) is used to drive yaw gear (13), provides enough torques to promote engagement gear ring (16) rotation in the cabin, rotates together with wind wheel thereby drive the cabin; Low speed high torque hydraulic motor (12) is four evenly to be arranged along meshing gear ring (16) circumference in the cabin, can guarantee that engagement gear ring (16) in the cabin obtains the driving moment of symmetry, avoids the unbalance loading phenomenon;
Said low speed high torque hydraulic motor (12) is imported and exported pipeline and is all connected relief valve (11) and one-way valve (10); Relief valve (11) plays the safety valve effect, prevents to cause that because of loine pressure is too high hydraulic element and conduit failure, one-way valve (10) are used to prevent that the fluid suction of motor rotary course mesolow chamber is empty;
Said driftage encoder (15) is used for the machines freight space and puts situation, and the wind direction signals that its testing signal and anemoclinograph (18) detect feeds back to fast in the wind controller jointly, realizes fast to the wind function through control ratio selector valve (9); Said pressure transducer (14) detects the oil liquid pressure signal of oil hydraulic motor two lateral lines in real time; And detected pressure signal fed back to accurately in the wind controller; Replenish fluid through control ratio selector valve (9) to the hyperbaric chamber of low speed high torque hydraulic motor (12); Whether the pressure difference that detects low speed high torque hydraulic motor (12) two lateral lines according to pressure transducer again is in allowed band; Thereby whether decision proportional reversing valve (9) is realized accurately to the wind function, to reach the effect of maximum use wind energy once more to the additional fluid of the hyperbaric chamber of low speed high torque hydraulic motor (12);
Said driftage counter (17) is used for the rotating cycle of machines shipping bill direction, when cabin folk prescription during to rotation 2.5 circles (900 degree), provides the trigger signal of untying the mooring rope, and yaw system is accomplished the function of untying the mooring rope.
2. a kind of undamped hydraulic yawing system based on Pressure testing according to claim 1 is characterized in that: low speed high torque hydraulic motor (12) is four and evenly arranges along engagement gear ring circumference in the cabin.
3. controlling method based on the undamped hydraulic yawing system of Pressure testing; May further comprise the steps: under the prerequisite that satisfies the yaw system starting condition; The wind direction signals that the wind wheel that the driftage encoder detects detects towards signal and anemoclinograph relatively, when deviation signal value (threshold value is made as 15 degree) greater than to wind diverter switch threshold value the time, deviation signal is passed through fast to after wind controller, damping link, the amplitude limit link; The opening degree of control 3-position 4-way proportional reversing valve; Thereby control gets into the fluid flow of oil hydraulic motor, rotates together with wind wheel through oil hydraulic motor rotating band engine compartment, realizes fast to the wind function;
The rotating cycle of driftage counter machines shipping bill direction, when the cabin folk prescription when rotation 2.5 circles (900 degree), provide the trigger signal of untying the mooring rope, yaw system is accomplished the function of untying the mooring rope;
It is characterized in that; It is further comprising the steps of: under the prerequisite that satisfies the yaw system starting condition; When above-mentioned deviation signal value less than to wind diverter switch threshold value the time because the existence of deviation can cause wind wheel influenced by lateral airflow, the driftage torsion that impeller produces shows as the periodic pressure surge of fluid in oil hydraulic motor two lateral lines; Pressure transducer detects both sides loine pressure difference and feeds back to accurately in the wind controller; After damping link, amplitude limit link, the opening degree of control 3-position 4-way proportional reversing valve replenishes certain fluid to the oil hydraulic motor hyperbaric chamber; Utilize pressure transducer to detect oil hydraulic motor both sides loine pressure difference whether in allowed band, confirm that whether proportional reversing valve is once more to the repairing of oil hydraulic motor hyperbaric chamber; When the fluctuation of the periodic pressure of fluid in the pipeline is reduced in the particular range, accomplish accurately to the wind function.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966637A (en) * | 2012-11-19 | 2013-03-13 | 党金行 | Intermittent hydraulic system |
| CN103557118A (en) * | 2013-11-20 | 2014-02-05 | 沈阳工业大学 | Electric-hydraulic proportional yaw damping device of wind turbine generator |
| CN103899481A (en) * | 2014-04-08 | 2014-07-02 | 上海电机学院 | Wind turbine yaw system and method |
| CN105134494A (en) * | 2015-08-07 | 2015-12-09 | 燕山大学 | System and method for controlling grid connection and disconnection of vertical axis hydraulic type wind generating set |
| CN105927471A (en) * | 2016-04-20 | 2016-09-07 | 燕山大学 | Low-wind-speed start control system and low-wind-speed start control method for hydraulic wind turbine generator system |
| CN109139585A (en) * | 2017-06-27 | 2019-01-04 | 罗伯特·博世有限公司 | Hydraulic arragement construction, building machinery and method |
| CN109367094A (en) * | 2018-11-27 | 2019-02-22 | 安徽东海机床制造有限公司 | A kind of large-tonnage portal frame type hydraulic press |
| CN109630355A (en) * | 2018-12-10 | 2019-04-16 | 济南德明电源设备有限公司 | Wind-driven generator yaws and the control method of variable pitch, controller and system automatically |
| CN109745159A (en) * | 2019-01-21 | 2019-05-14 | 北京航空航天大学 | A kind of ankle-joint artificial limb hydraulic drive circuit for realizing damping control and energy regenerating |
| CN110173472A (en) * | 2019-05-15 | 2019-08-27 | 明阳智慧能源集团股份公司 | The test bed hydraulic system of wind turbine gearbox flexible pin shaft and its control method |
| CN112228275A (en) * | 2020-10-16 | 2021-01-15 | 中国船舶重工集团海装风电股份有限公司 | Electromagnetic damping yawing method and device for wind turbine generator |
| CN112932617A (en) * | 2021-03-09 | 2021-06-11 | 济南新本信息技术有限公司 | Touch medium for precise control and clamping device for narrow cavity channel using same |
| CN113482850A (en) * | 2021-06-24 | 2021-10-08 | 浙江大学 | Distributed electro-hydraulic driven fan yawing and braking system |
| CN114109931A (en) * | 2021-12-03 | 2022-03-01 | 哈电风能有限公司 | Yaw brake control method and system for wind generating set |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966637A (en) * | 2012-11-19 | 2013-03-13 | 党金行 | Intermittent hydraulic system |
| CN103557118A (en) * | 2013-11-20 | 2014-02-05 | 沈阳工业大学 | Electric-hydraulic proportional yaw damping device of wind turbine generator |
| CN103899481A (en) * | 2014-04-08 | 2014-07-02 | 上海电机学院 | Wind turbine yaw system and method |
| CN105134494A (en) * | 2015-08-07 | 2015-12-09 | 燕山大学 | System and method for controlling grid connection and disconnection of vertical axis hydraulic type wind generating set |
| CN105134494B (en) * | 2015-08-07 | 2018-04-06 | 燕山大学 | Vertical axis hydraulic wind power generating set and off-grid control system and control method |
| CN105927471A (en) * | 2016-04-20 | 2016-09-07 | 燕山大学 | Low-wind-speed start control system and low-wind-speed start control method for hydraulic wind turbine generator system |
| CN109139585A (en) * | 2017-06-27 | 2019-01-04 | 罗伯特·博世有限公司 | Hydraulic arragement construction, building machinery and method |
| CN109367094B (en) * | 2018-11-27 | 2024-03-01 | 安徽东海机床制造有限公司 | Large-tonnage portal frame type oil press |
| CN109367094A (en) * | 2018-11-27 | 2019-02-22 | 安徽东海机床制造有限公司 | A kind of large-tonnage portal frame type hydraulic press |
| CN109630355A (en) * | 2018-12-10 | 2019-04-16 | 济南德明电源设备有限公司 | Wind-driven generator yaws and the control method of variable pitch, controller and system automatically |
| CN109630355B (en) * | 2018-12-10 | 2021-10-15 | 济南德明电源设备有限公司 | Control method, controller and system for automatic yawing and variable pitch of wind driven generator |
| CN109745159A (en) * | 2019-01-21 | 2019-05-14 | 北京航空航天大学 | A kind of ankle-joint artificial limb hydraulic drive circuit for realizing damping control and energy regenerating |
| CN110173472A (en) * | 2019-05-15 | 2019-08-27 | 明阳智慧能源集团股份公司 | The test bed hydraulic system of wind turbine gearbox flexible pin shaft and its control method |
| CN110173472B (en) * | 2019-05-15 | 2024-03-26 | 明阳智慧能源集团股份公司 | Hydraulic system of wind power gear box flexible pin shaft test bench and control method thereof |
| CN112228275A (en) * | 2020-10-16 | 2021-01-15 | 中国船舶重工集团海装风电股份有限公司 | Electromagnetic damping yawing method and device for wind turbine generator |
| CN112932617A (en) * | 2021-03-09 | 2021-06-11 | 济南新本信息技术有限公司 | Touch medium for precise control and clamping device for narrow cavity channel using same |
| CN113482850A (en) * | 2021-06-24 | 2021-10-08 | 浙江大学 | Distributed electro-hydraulic driven fan yawing and braking system |
| CN114109931A (en) * | 2021-12-03 | 2022-03-01 | 哈电风能有限公司 | Yaw brake control method and system for wind generating set |
| CN114109931B (en) * | 2021-12-03 | 2024-04-05 | 哈电风能有限公司 | Yaw brake control method and system for wind generating set |
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