CN103398840A - Fan blade fatigue loading and gravity compensation device and test method thereof - Google Patents
Fan blade fatigue loading and gravity compensation device and test method thereof Download PDFInfo
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- CN103398840A CN103398840A CN2013103225943A CN201310322594A CN103398840A CN 103398840 A CN103398840 A CN 103398840A CN 2013103225943 A CN2013103225943 A CN 2013103225943A CN 201310322594 A CN201310322594 A CN 201310322594A CN 103398840 A CN103398840 A CN 103398840A
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Abstract
The invention provides a fan blade fatigue loading and gravity compensation device and a test method thereof, belonging to the field of a blade load simulation test device, and particularly relates to a fatigue loading and gravity compensation device for fan blades and a test method thereof. The fan blade fatigue loading and gravity compensation device comprises a fatigue loading device and a gravity compensation device, the fatigue loading device comprises a blade clamp (5), a power device and a fixing guide rail (1), the bottom of the power device is connected with the guide rail (1) which is fixedly arranged on the ground, the top part of the power device is hinged to the bottom of the blade clamp (5), one side of the fatigue loading device is provided with the gravity compensation device, and the external force loading end of the gravity compensation device is connected with the top part of the blade clamp (5). Firstly, the traditional installation and loading method of fixing the loading device on the surface of a blade loading point is changed, and the inherent properties of blades are maintained. Moreover, extra gravitational influence on the blades caused by a test device can be eliminated by the added gravity compensation device, thereby completely avoiding the defect of test data distortion resulting from installation of the test device.
Description
Technical field
The fatigue loading of fan blade and gravity-compensated device and test method thereof, belong to blade loading simulated test facility field, is specifically related to a kind of fatigue loading test unit of pneumatic equipment blades made of four cylinders drivings.
Background technology
Pneumatic equipment blades made fatigue loading test unit, be mainly used in the load simulated test of blade of wind-driven generator, mainly there is following deficiency in present technical scheme: first, all adopt at present the fatigue loading test unit to be fixed on the blade load(ing) point, cross with blade pass the organization plan that fixture combines as a whole, charger is placed on blade, to blade, has increased a larger additional weight, change the inherent characteristic of blade, easily caused the testing fatigue data distortion.
second, the current fatigue loading of pneumatic equipment blades made based on Driven by Hydraulic Cylinder test unit, can only realize the blade uniaxial loading, namely adopt blade face to (vibration of blade upper-lower position is thought towards loading with tangential loading respectively, tangential loading is thought in position, left and right vibration) mode, when after loaded, first fatigue loading device and fixture are removed from blade, again blade being loaded bearing from tubular removes, with blade rotation 90 degree, reinstall to again on the fatigue loading bearing, blade fixture and fatigue loading device are installed again, bother very much in the engineering application.Fatigue loading device is installed on blade in addition, to blade, has increased an extra weight, does not possess again the device of gravity compensation simultaneously, has aggravated the inaccuracy of experiment structure.
Therefore, the uniaxial loading mode of prior art and the actual loading operating mode of blade differ larger, and the test period is longer, and test unit is also inapplicable, and test findings is also unsatisfactory.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provide a kind of test period short, do not affect blade inherent characteristic, test findings accurately, fatigue loading can realize fatigue loading and gravity-compensated device and the test method thereof of the fan blade of gravity compensation simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: the fatigue loading of this fan blade and gravity-compensated device and test method thereof, it is characterized in that: comprise fatigue loading device and gravity-compensated device, fatigue loading device comprises blade fixture, propulsion system and the fixing guide rail of use, the propulsion system bottom is connected with the guide rail that fixes on the ground, propulsion system top hinged blades clamp base, one side of fatigue loading device arranges gravity-compensated device, and the external force loading end of gravity-compensated device connects the blade fixture top.The size of blade fixture and large I are adjusted arbitrarily, have good versatility, and the installation of blade fixture do not affect the inherent characteristic of blade, can realize blade single shaft or the test of diaxon fatigue loading under the prerequisite of modifier structure not, and dirigibility is very high.
Described blade fixture is arranged on along the blade exhibition to 70% place.
Described propulsion system are hydraulic power unit, be symmetrical set two groups, every group includes a level and is arranged on horizontal hydraulic cylinder and a tilting hydraulic cylinder that is obliquely installed that is attached thereto in guide rail, hinged by left slider between left side horizontal hydraulic cylinder and the tilting hydraulic cylinder in left side, hinged by right slide block between the tilting hydraulic cylinder in right side horizontal hydraulic cylinder and right side; The right part of horizontal hydraulic cylinder left part, left side and right side horizontal hydraulic cylinder is fixedly connected with respectively two ends, left and right in guide rail.The length of adjusting in real time two tilting hydraulic cylinders realizes that blade face loads to, tangential or diaxon, in process of the test, if the amplitude of blade is inadequate, can assist the length of adjusting two horizontal hydraulic cylinders, also can adjust in advance the position of the stiff end of both sides in two horizontal hydraulic cylinders to change the amplitude of blade loading.
Be embedded with the magneto strictive sensor of Real-Time Monitoring hydraulic cylinder length in each hydraulic cylinder of described propulsion system.
Described gravity-compensated device comprises fixed support and is arranged on a plurality of pulleys, sliding-block linkage, push cylinder and hydraulic wireline winch on fixed support, the fixed support bottom is provided with travelling wheel, upper right hinged support frame, connection sliding block linkage assembly upper end, bracing frame below, sliding-block linkage lower end vertical connecting is arranged on the push cylinder on fixed support right side.
Described a plurality of pulley comprises the first pulley that is arranged on bottom, fixed support left side, the second pulley of fixed support left upper portion and the 3rd pulley that the bracing frame outboard end is installed, from wire rope order pile warp the first pulley, the second pulley and the 3rd pulley that hydraulic wireline winch stretches out, the free end of wire rope is fixedly connected with the blade fixture top as the external force loading end.
Described sliding-block linkage comprises slide rail, longitudinal sliding block and connecting rod, and slide rail vertically is arranged on support bracket fastened right flank, and slide block is arranged in slide rail, and the slide block upside connects the connecting rod lower end, and downside connects the output terminal of push cylinder; The connecting rod top connects the sliding end in the bracing frame outside.
The opposite side of described fatigue loading device is provided with the blade contour with blade fixture and loads bearing, and it is the cartridge type support that is provided with for the blade fixed orifice of placing root of blade that blade loads bearing.
A kind of fatigue loading of fan blade as above and test method that gravity-compensated device is tested utilized is characterized in that: comprise the following steps,
A, at first fixedly mount the fatigue loading device of fan blade, guide rail is fixed on the ground by high-strength bolt, propulsion system are arranged in guide rail, and at propulsion system top hinged blades fixture;
B, at guide rail one, be sidelong and put cartridge type blade and load bearing, the root of fan blade is fixed in the blade fixed orifice that the cartridge type blade loads bearing, along the blade exhibition, to 70% place, blade fixture is installed, fan blade maintenance level is installed;
C, from the hydraulic wireline winch of gravity-compensated device stretched wire rope, with wire rope order pile warp the first pulley, the second pulley and the 3rd pulley, the free end of wire rope is fixedly attached to the top of blade fixture as the external force loading end, and the pulling force sensor of connecting on wire rope, the pulling force on the Real-Time Monitoring wire rope;
D, startup propulsion system, the tilting hydraulic cylinder in left side and the tilting hydraulic cylinder in right side are under the effect of control system, driven vane is carried out torture test, and the length of adjusting in real time the tilting hydraulic cylinder in left side and the tilting hydraulic cylinder in right side realizes that blade face loads to, tangential or diaxon;
E, in blade up-down vibration process, real-time monitored is connected on the value of thrust that the pulling force sensor on wire rope shows, and controls the rotating of hydraulic wireline winch according to value of thrust, guarantees the force retaining constant on wire rope;
F, be embedded in hydraulic cylinder inside the corresponding hydraulic cylinder of magneto strictive sensor Real-Time Monitoring length variations and feed back to control system, control system obtains the current coordinate of blade load(ing) point according to feedback signal, the auxiliary length of adjusting left side horizontal hydraulic cylinder and right side horizontal hydraulic cylinder, finally obtain fatigue loading data accurately.
Described blade fixture is the cuboid of fabricated structure, and cuboid comprises hard-wired clamping plate on support body that upper and lower surface is surrounded side by side by angle steel or channel-section steel and support body rear and front end face, and the center of clamping plate is provided with the blades installation hole; Described clamping plate are formed by the symmetrically arranged two block length side's plate spelling groups in up and down, and two rectangular plate inboards are provided with arc-shaped side, and two arc-shaped sides are combined to form the blades installation hole of clamping plate.
Compared with prior art, the beneficial effect that has of the present invention is:
1, change the installation fixed form of fatigue loading device, keep the blade inherent characteristic: the fatigue loading of this fan blade and gravity-compensated device and test method thereof directly fix on the ground by guide rail, changed the installation load mode that charger in the past is fixed on blade load(ing) point surface fully, thereby the installation of warranty test device does not change the build-in attribute of blade, thereby thoroughly stops to cause because of the installation of test unit the drawback of experimental test data distortion.
2, farthest reduce error, the warranty test data are accurately and reliably: in fatigue loading one side, gravity-compensated device is set simultaneously, when carrying out fatigue loading, can overcome in real time again the gravity effect that the deadweight of the test units such as blade fixture causes blade, farthest reduced the stressing conditions of blade in the actual loading process, reduce stressed error, fully guarantee the reliable true and accuracy of fatigue loading data, farthest eliminated the error that exists in the process of the test, the warranty test result.
3, simple in structure, reasonable in design, realize multidirectional loading: adopt symmetrically arranged four hydraulic cylinders to carry out the power fatigue loading to fan blade, realized simultaneously the fatigue loading of blade face to, tangential or diaxon on same set of device, shortened the test period, save and repeatedly remove and install the loaded down with trivial details of blade fixture, as long as adopt different control modes can meet testing requirements, eliminated existing loading scheme and can only realize the drawback of single shaft or twin shaft.
4, can realize that the blade movement scope is large, length or the position fixed ends that change horizontal hydraulic cylinder and the length of horizontal hydraulic cylinder by adjusting four hydraulic drive cylinders, can realize that blade loads on a large scale, shortens the test period.
Description of drawings
Fig. 1 is the fan blade fatigue loading device axonometric drawing schematic diagram that four cylinders drive.
Fig. 2 is the fan blade fatigue loading device front view schematic diagram that four cylinders drive.
Fig. 3 is the fan blade fatigue loading device motion process schematic diagram that four cylinders drive.
Fig. 4 is the fan blade gravity-compensated device axonometric drawing schematic diagram that four cylinders drive.
Fig. 5 is the fan blade gravity-compensated device front view schematic diagram that four cylinders drive.
wherein: 1, guide rail 2, left slider 3, left side horizontal hydraulic cylinder 4, the tilting hydraulic cylinder 5 in left side, blade fixture 6, the tilting hydraulic cylinder 7 in right side, right slide block 8, right side horizontal hydraulic cylinder 9, sensor 10, clamping plate 11, blades installation hole 12, support body 13, fixed support 14, push cylinder 15, hydraulic wireline winch 16, travelling wheel 17, bracing frame 18, the first pulley 19, the second pulley 20, the 3rd pulley 21, slide rail 22, slide block 23, connecting rod 24, blade loads bearing 25, the blade fixed orifice.
Embodiment
Fig. 1 ~ 3rd, most preferred embodiment of the present invention, the present invention will be further described below in conjunction with accompanying drawing 1 ~ 3.
with reference to accompanying drawing 1 ~ 3: the fatigue loading of fan blade and gravity-compensated device, comprise fatigue loading device and gravity-compensated device, fatigue loading device comprises blade fixture 5, propulsion system and the fixing guide rail 1 of use, guide rail 1 by uniform a plurality of standing screw fixed installations on the ground, the propulsion system bottom is connected with the guide rail 1 that fixes on the ground, hinged blades fixture 5 bottoms, propulsion system top, blade fixture 5 is arranged on along the blade exhibition to 70% place, a side at fatigue loading device arranges gravity-compensated device, the external force loading end of gravity-compensated device connects blade fixture 5 tops.The opposite side of fatigue loading device is provided with the blade contour with blade fixture 5 and loads bearing 24, and blade loads bearing 24 for being provided with the cartridge type support for the blade fixed orifice 25 of placing root of blade.
Propulsion system are hydraulic power unit, be symmetrical set two groups, every group includes a level and is arranged on horizontal hydraulic cylinder and a tilting hydraulic cylinder that is obliquely installed that is attached thereto in guide rail 1, and is embedded with the magneto strictive sensor 9 of Real-Time Monitoring hydraulic cylinder length in each hydraulic cylinder.Hinged by left slider 2 between the tilting hydraulic cylinder 4 of left side horizontal hydraulic cylinder 3 and left side on the left of being arranged on, be arranged between the tilting hydraulic cylinder 6 of right side horizontal hydraulic cylinder 8 and right side on right side hingedly by right slide block 7, left slider 2 and right slide block 7 can slide at guide rail 1 inside groove cathetus; The right part of horizontal hydraulic cylinder 3 left parts, left side and right side horizontal hydraulic cylinder 8 is fixedly connected with respectively two ends, the interior left and right of guide rail 1, or be fixed on guide rail 1 inside by a fixed block and screw rod, the position of the stiff end of horizontal hydraulic cylinder 3 left parts and right side horizontal hydraulic cylinder 8 on the left of being convenient to adjust at any time.The tilting hydraulic cylinder 4 in left side and tilting hydraulic cylinder 6 upper ends, right side are by the common hinged blades fixture of hinge 5 bottom centre places.
Gravity-compensated device comprises fixed support 13 and is arranged on a plurality of pulleys, sliding-block linkage, push cylinder 14 and hydraulic wireline winch 15 on fixed support 13, fixed support 13 bottoms are provided with travelling wheel 16, upper right hinged support frame 17, bracing frame 17 connection sliding block linkage assembly upper ends, below, sliding-block linkage lower end vertical connecting is arranged on the push cylinder 14 on fixed support 13 right sides.A plurality of pulleys comprise the first pulley 18 that is arranged on fixed support 13 bottoms, left side, the second pulley 19 of fixed support 13 left upper portion and the 3rd pulley 20 that bracing frame 17 outboard end are installed, from wire rope order pile warp the first pulley 18, the second pulley 19 and the 3rd pulley 20 that hydraulic wireline winch 15 stretches out, the free end of wire rope is fixedly connected with blade fixture 5 tops as the external force loading end.
Sliding-block linkage comprises slide rail 21, longitudinal sliding block 22 and connecting rod 23, and slide rail 21 vertically is arranged on the right flank of fixed support 13, and slide block 22 is arranged in slide rail 21, and slide block 22 upsides connect connecting rod 23 lower ends, and downside connects the output terminal of push cylinder 14; Connecting rod 23 tops connect the sliding end in bracing frame 17 outsides.
Utilize the test method of fatigue loading and the gravity-compensated device of above-mentioned fan blade, experimental procedure is as follows:
A, at first fixedly mount the fatigue loading device of fan blade, guide rail 1 is fixed on the ground by high-strength bolt, propulsion system are arranged in guide rail 1, and at propulsion system top hinged blades fixture 5;
B, at guide rail one, be sidelong and put cartridge type blade and load bearing 24, with the root of fan blade be fixed on the cartridge type blade load the blade fixed orifice 25 of bearing 24 interior on, to 70% place, blade fixture 5 is installed along the blade exhibition, fan blade maintenance level is installed;
C, from the hydraulic wireline winch 15 of gravity-compensated device stretched wire rope, with wire rope order pile warp the first pulley 18, the second pulley 19 and the 3rd pulley 20, the free end of wire rope is fixedly attached to the top of blade fixture 5 as the external force loading end, and the pulling force sensor of connecting on wire rope, the pulling force on the Real-Time Monitoring wire rope;
D, startup propulsion system, the tilting hydraulic cylinder 4 in left side and the tilting hydraulic cylinder 6 in right side are under the effect of control system, driven vane is carried out torture test, and the length of adjusting in real time the tilting hydraulic cylinder 4 in left side and the tilting hydraulic cylinder 6 in right side realizes that blade face loads to, tangential or diaxon;
E, in blade up-down vibration process, real-time monitored is connected on the value of thrust that the pulling force sensor on wire rope shows, and controls the rotating of hydraulic wireline winch 15 according to value of thrust, guarantees the force retaining constant on wire rope;
F, be embedded in hydraulic cylinder inside the magneto strictive sensor 9 corresponding hydraulic cylinders of Real-Time Monitoring length variations and feed back to control system, control system obtains the current coordinate of blade load(ing) point according to feedback signal, the auxiliary length of adjusting left side horizontal hydraulic cylinder 3 and right side horizontal hydraulic cylinder 8, finally obtain fatigue loading data accurately.
Be embedded in hydraulic cylinder inside magneto strictive sensor 9 Real-Time Monitoring hydraulic cylinders length variations and feed back to control system, control system obtains the current coordinate of blade load(ing) point according to feedback signal, the length of adjusting in real time the tilting hydraulic cylinder 4 in left side and the tilting hydraulic cylinder 6 in right side realizes that blade face loads to, tangential or diaxon.In process of the test, if the amplitude of blade is inadequate, can assist the length of adjusting left side horizontal hydraulic cylinder 3 and right side horizontal hydraulic cylinder 8, on the left of also can adjusting in advance, the position of the stiff end of horizontal hydraulic cylinder 3 left parts and right side horizontal hydraulic cylinder 8, to change the amplitude of blade loading, fully guarantees the accuracy of experimental data.If need larger blade amplitude, the position that can stretch or adjust left slider 2 and right slide block 7 by controlling the tilting hydraulic cylinder 4 in left side and left side horizontal hydraulic cylinder 3.
The above, be only preferred embodiment of the present invention, is not the present invention to be done the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away from,, to any simple modification, equivalent variations and remodeling that above embodiment does, still belong to the protection domain of technical solution of the present invention according to technical spirit of the present invention.
Claims (10)
1. the fatigue loading of fan blade and gravity-compensated device, it is characterized in that: comprise fatigue loading device and gravity-compensated device, fatigue loading device comprises blade fixture (5), propulsion system and the fixing guide rail of use (1), the propulsion system bottom is connected with the guide rail that fixes on the ground (1), propulsion system top hinged blades fixture (5) bottom, a side at fatigue loading device arranges gravity-compensated device, and the external force loading end of gravity-compensated device connects blade fixture (5) top.
2. the fatigue loading of fan blade according to claim 1 and gravity-compensated device is characterized in that: described blade fixture (5) is arranged on along the blade exhibition to 70% place.
3. the fatigue loading of fan blade according to claim 1 and gravity-compensated device, it is characterized in that: described propulsion system are hydraulic power unit, be symmetrical set two groups, every group includes a level and is arranged on horizontal hydraulic cylinder and a tilting hydraulic cylinder that is obliquely installed that is attached thereto in guide rail (1), hinged by left slider (2) between left side horizontal hydraulic cylinder (3) and the tilting hydraulic cylinder in left side (4), hinged by right slide block (7) between the tilting hydraulic cylinder of right side horizontal hydraulic cylinder (8) and right side (6); The right part of horizontal hydraulic cylinder (3) left part, left side and right side horizontal hydraulic cylinder (8) is fixedly connected with respectively two ends, the interior left and right of guide rail (1).
4. the fatigue loading of fan blade according to claim 3 and gravity-compensated device, is characterized in that: the magneto strictive sensor (9) that is embedded with Real-Time Monitoring hydraulic cylinder length in each hydraulic cylinder of described propulsion system.
5. the fatigue loading of fan blade according to claim 1 and gravity-compensated device, it is characterized in that: described gravity-compensated device comprises fixed support (13) and is arranged on a plurality of pulleys, sliding-block linkage, push cylinder (14) and hydraulic wireline winch (15) on fixed support (13), fixed support (13) bottom is provided with travelling wheel (16), upper right hinged support frame (17), connection sliding block linkage assembly upper end, bracing frame (17) below, sliding-block linkage lower end vertical connecting is arranged on the push cylinder (14) on fixed support (13) right side.
6. the fatigue loading of fan blade according to claim 5 and gravity-compensated device, it is characterized in that: described a plurality of pulleys comprise the first pulley (18) that is arranged on bottom, fixed support (13) left side, the 3rd pulley (20) that second pulley (19) of fixed support (13) left upper portion and bracing frame (17) outboard end are installed, wire rope order pile warp the first pulley (18) that stretches out from hydraulic wireline winch (15), the second pulley (19) and the 3rd pulley (20), the free end of wire rope is fixedly connected with blade fixture (5) top as the external force loading end.
7. the fatigue loading of fan blade according to claim 5 and gravity-compensated device, it is characterized in that: described sliding-block linkage comprises slide rail (21), longitudinal sliding block (22) and connecting rod (23), slide rail (21) vertically is arranged on the right flank of fixed support (13), slide block (22) is arranged in slide rail (21), slide block (22) upside connects connecting rod (23) lower end, and downside connects the output terminal of push cylinder (14); Connecting rod (23) top connects the sliding end in bracing frame (17) outside.
8. the fatigue loading of fan blade according to claim 1 and gravity-compensated device, it is characterized in that: the opposite side of described fatigue loading device is provided with the blade contour with blade fixture (5) and loads bearing (24), and blade loads bearing (24) for being provided with the cartridge type support for the blade fixed orifice (25) of placing root of blade.
9. a utilization such as the fatigue loading of the arbitrary described fan blade of claim 1 ~ 8 and the test method that gravity-compensated device is tested is characterized in that: comprise the following steps,
A, at first fixedly mount the fatigue loading device of fan blade, guide rail (1) is fixed on the ground by high-strength bolt, propulsion system are arranged in guide rail (1), and at propulsion system top hinged blades fixture (5);
B, at guide rail one, be sidelong and put cartridge type blade and load bearing (24), the root of fan blade is fixed in the blade fixed orifice (25) of cartridge type blade loading bearing (24), to 70% place, blade fixture (5) is installed along the blade exhibition, fan blade maintenance level is installed;
C, from the hydraulic wireline winch (15) of gravity-compensated device stretched wire rope, with wire rope order pile warp the first pulley (18), the second pulley (19) and the 3rd pulley (20), the free end of wire rope is fixedly attached to the top of blade fixture (5) as the external force loading end, and the pulling force sensor of connecting on wire rope, the pulling force on the Real-Time Monitoring wire rope;
D, startup propulsion system, left side tilting hydraulic cylinder (4) and the tilting hydraulic cylinder in right side (6) are under the effect of control system, driven vane is carried out torture test, and the length of adjusting in real time left side tilting hydraulic cylinder (4) and the tilting hydraulic cylinder in right side (6) realizes that blade face is to, tangential or diaxon loading;
E, in blade up-down vibration process, real-time monitored is connected on the value of thrust that the pulling force sensor on wire rope shows, and controls the rotating of hydraulic wireline winch (15) according to value of thrust, guarantees the force retaining constant on wire rope;
F, be embedded in hydraulic cylinder inside the corresponding hydraulic cylinder of magneto strictive sensor (9) Real-Time Monitoring length variations and feed back to control system, control system obtains the current coordinate of blade load(ing) point according to feedback signal, the auxiliary length of adjusting left side horizontal hydraulic cylinder (3) and right side horizontal hydraulic cylinder (8), finally obtain fatigue loading data accurately.
10. the fatigue loading of fan blade according to claim 1 and 2 and gravity-compensated device and test method thereof, it is characterized in that: described blade fixture (5) is the cuboid of fabricated structure, cuboid comprises hard-wired clamping plate (10) on support body (12) that upper and lower surface is surrounded side by side by angle steel or channel-section steel and support body (12) rear and front end face, and the center of clamping plate (10) is provided with blades installation hole (11); Described clamping plate (10) are formed by the symmetrically arranged two block length side's plate spelling groups in up and down, and two rectangular plate inboards are provided with arc-shaped side, and two arc-shaped sides are combined to form the blades installation hole (11) of clamping plate (10).
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| CN2013103225943A CN103398840A (en) | 2013-07-29 | 2013-07-29 | Fan blade fatigue loading and gravity compensation device and test method thereof |
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| CN106197988A (en) * | 2016-08-30 | 2016-12-07 | 徐州东宏机械制造有限公司 | A kind of air spring tensile test device |
| CN112268691A (en) * | 2020-10-28 | 2021-01-26 | 山东理工大学 | Dead weight balancing device used in static force loading and side-pulling test of wind power blade |
| US11579039B2 (en) | 2016-11-30 | 2023-02-14 | Vestas Wind Systems A/S | Torsional testing of a wind turbine blade |
| CN118758587A (en) * | 2024-09-09 | 2024-10-11 | 太原科技大学 | Wind turbine generator system subassembly installation intensity detection device |
| CN118758587B (en) * | 2024-09-09 | 2024-11-12 | 太原科技大学 | Wind turbine generator system subassembly installation intensity detection device |
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Application publication date: 20131120 |