阅读说明：本技术 一种风电叶片多质点串联速度放大型减振装置及连接方法 (Wind power blade multi-particle series speed amplification type vibration reduction device and connection method ) 是由 李万润 吴王浩 李刚刚 赵文海 潘梓鸿 李家富 于 2021-01-19 设计创作，主要内容包括：一种风电叶片多质点串联速度放大型减振装置及连接方法,通过在风电叶片中安装串联的空心质量钢球,并在空心质量钢球中设置一个实心钢球和一个实心乳胶球,配合定滑轮装置及速度放大装置,达到多层多向减振。叶片振动时带动靠近叶尖的空心质量钢球振动,每个空心质量钢球又可以限制前面空心质量钢球的振动,达到多层减振的效果,空心质量钢球的内部设有一个实心钢球和一个实心乳胶球,空心质量钢球振动时,作为粘弹性材料的乳胶球与钢球发生碰撞会吸收部分能量而耗能,同时串联的空心质量钢球振动时也会在任意方向拉伸钢索,使速度放大装置起作用,间接增加阻尼,达到多向减振,在保证风电叶片质量不过分增加的情况下有效控制风电叶片的多向振动。(A wind power blade multi-particle series speed amplification type vibration damper and a connection method are characterized in that hollow mass steel balls which are connected in series are installed in a wind power blade, a solid steel ball and a solid latex ball are arranged in the hollow mass steel balls, and a fixed pulley device and a speed amplification device are matched to achieve multi-layer multi-directional vibration damping. The blade drives the hollow mass steel ball close to the blade tip to vibrate when vibrating, each hollow mass steel ball can limit the vibration of the front hollow mass steel ball, the effect of multi-layer vibration reduction is achieved, a solid steel ball and a solid latex ball are arranged inside each hollow mass steel ball, when the hollow mass steel balls vibrate, the latex balls serving as viscoelastic materials collide with the steel balls, partial energy can be absorbed, energy consumption is achieved, meanwhile, the steel cable can be stretched in any direction when the hollow mass steel balls connected in series vibrate, the speed amplification device is enabled to act, damping is indirectly increased, multi-directional vibration reduction is achieved, and multi-directional vibration of the wind power blade is effectively controlled under the condition that the mass of the wind power blade is not excessively increased.)

1. A wind power blade multi-mass-point series connection speed amplification type vibration damper comprises a pull ring (1), a No. 1 steel cable (2), a porous bolt ball joint (3), a hollow mass steel ball (4), a No. 2 steel cable (5), a fixed pulley device (6), a speed amplification device (7) and a reset spring (9), and is characterized in that 4 pull rings (1) are arranged; the porous bolt ball joint (3) is composed of a No. 1 steel cable screw hole (30), a No. 1 steel cable screw rod (31), a No. 2 steel cable screw hole (32) and a No. 2 steel cable screw rod (33), and is connected with the No. 1 steel cable screw rod (31) through the No. 1 steel cable screw hole (30), and the No. 2 steel cable screw hole (32) is connected with the No. 2 steel cable screw rod (33) to form the porous bolt ball joint (3); 1 fixed pulley device (6) is arranged and is composed of 2 symmetrical and tangent fixed pulleys (61) which are anchored on a fixed plate (63) through a flange shaft (60) and a fixed nut (62); the speed amplification device (7) consists of a No. 1 support (75), a No. 2 support (76), a gear rotating shaft (74), a turntable (73), a cross track (72), a vertical track (71), a sliding block (70), a No. 1 pull rod (77), a No. 2 pull rod (78), a No. 3 pull rod (79) and a damper (80); mounting holes (82) are respectively preset at the two ends and the central position of the No. 1 pull rod (77), and mounting holes (82) are respectively preset at the two ends of the No. 2 pull rod (78) and the No. 3 pull rod (79); the No. 1 support (75) and the No. 2 support (76) have the same structure and different installation positions; a bolt hole is reserved on each gear tooth (52) on the gear rotating shaft (74); one end of a horizontal rail of the cross rail (72) is welded on the side surface of the vertical rail (71), the other end of the horizontal rail is welded on a bottom plate of the No. 2 support (76), and the horizontal rail, the vertical rail and the vertical rail (71) of the cross rail (72) are respectively provided with a sliding block (70); a circular hole is reserved at one end of the vertical rail (71), one end of the damper (80) penetrates through the circular hole, and the other end of the damper is welded on the blade bottom plate (8) perpendicular to the vertical rail (71); a mounting hole (82) at one end of the No. 3 pull rod (79) is mounted on a sliding block (70) of the vertical track (71) through a round T-shaped key (81), and a mounting hole (82) at the other end of the No. 3 pull rod is mounted on the No. 2 pull rod (78) through the round T-shaped key (81); no. 1 pull rod (77) and No. 2 pull rod (78) mounting hole (82) at both ends install respectively the symmetry on 2 slider (70) that set up in cross track (72) horizontal rail and vertical track through circle T type key (81), through circle T type key (81) on carousel (73) with No. 1 pull rod (77) central point put predetermined mounting hole (82) and carousel (73) one side circumferential edge reason be connected, the central point of carousel (73) another side puts the welding in gear shaft (74) one end, embolia No. 2 support (76) and No. 1 support (75) behind gear shaft (74) welding carousel (73), the welding circular end plate, form speed amplification device (7).

2. The wind turbine blade multi-mass-point series speed amplification type vibration damping device according to claim 1, characterized in that: 3 steel cables (2) are arranged on the No. 1 steel cable, 4 steel cables (5) are arranged on the No. 2 steel cable, the two steel cables are made of the same material, and the ratio of the diameter of the No. 1 steel cable (2) to the diameter of the No. 2 steel cable (5) is 1/3.

3. The wind turbine blade multi-mass-point series speed amplification type vibration damping device according to claim 1, characterized in that: 3 hollow mass steel balls (4) are arranged, 1 solid steel ball (40) and 1 solid emulsion ball (42) are arranged in the hollow of each hollow mass steel ball (4), and 2 hollow mass steel ball screw holes (43) are symmetrically arranged in each hollow mass steel ball (4) and are respectively connected with 2 hollow mass steel ball screw rods (41).

4. The wind turbine blade multi-mass-point series speed amplification type vibration damping device according to claim 1, characterized in that: the ratio of the hollow volume in the hollow mass steel ball (4) to the sum of the volumes of 1 solid steel ball (40) and 1 solid latex ball (42) is more than 4.

5. The wind turbine blade multi-mass-point series speed amplification type vibration damping device according to claim 1, characterized in that: two ends of the No. 1 pull rod (77) and the No. 2 pull rod (78) are connected to the same sliding block (70) in pairs, so that synchronous operation is realized, and the two ends are parallel to the cross rail (72).

6. The wind turbine blade multi-mass-point series speed amplification type vibration damping device according to claim 1, characterized in that: the sliding block (70) and the mounting hole (82) are connected through a round T-shaped key (81), and the round T-shaped key (81) and the mounting hole (82) have the same height and can be completely engaged.

7. The wind turbine blade multi-mass-point series speed amplification type vibration damping device according to claim 1, characterized in that: the connecting position of the No. 2 pull rod (78) and the No. 3 pull rod (79) is close to 1/3 of a section of the cross rail (72) close to the horizontal rail of the No. 2 pull rod (78).

8. The method for connecting the wind power blade multi-mass-point series speed amplification type vibration damper as claimed in claim 1, wherein: the method comprises the following steps:

step (1): taking 3 No. 1 steel cables (2), penetrating one end of each steel cable through 3 pull rings (1) which are adhered to the inner surface of the blade tip by epoxy resin adhesive, fixing the pull rings by a ring buckle (11) matched with a friction sleeve (12), and connecting the other end of each steel cable with a No. 1 steel cable screw rod (31) by the epoxy resin adhesive;

step (2): screwing 3 No. 1 steel cable screw rods (31) into No. 1 steel cable screw holes (30) of the porous bolt ball joints (3), taking 1 No. 2 steel cables (5), connecting one end of each No. 2 steel cable screw rod (33) with an epoxy resin adhesive, and screwing the end into No. 2 steel cable screw holes (32) of the porous bolt ball joints (3) after connection; the other end is connected with a hollow mass steel ball screw rod (41) by an epoxy resin adhesive;

and (3): screwing the other end of the No. 2 steel cable (5) in the step (2) into a hollow mass steel ball screw hole (43) of 1 hollow mass steel ball (4), taking 2 hollow mass steel balls (4) and 2 No. 2 steel cables (5), and connecting the 2 No. 2 steel cables (5) with hollow mass steel ball screws (41) at two ends with 3 hollow mass steel balls in the same way;

and (4): another longer No. 2 steel cable (5) is taken, and one end of the other steel cable is connected with a hollow mass steel ball screw rod (41) by using an epoxy resin adhesive and then screwed into the last hollow mass steel ball screw hole (43);

and (5): the assembled two fixed pulleys are symmetrically and tangentially fixed on a fixed plate (63) by a flange shaft (60) matched with a fixed nut (62) through the flange shaft (60) connected with one fixed pulley (61) and the other same fixed pulley (61) connected with the flange shaft, and finally the fixed plate (63) is stuck on the inner wall of the wind power blade (10) by an epoxy resin adhesive to form a fixed pulley device (6);

and (6): the other end of the No. 2 steel cable (5) in the step (4) passes through the fixed pulley device (6) assembled and fixed in the step (5) and then is wound and fixed on a gear rotating shaft (74) of the speed amplifying device (7), a bolt hole is reserved in each gear tooth (52) on the gear rotating shaft (74), and the connecting position of the steel cable can be flexibly adjusted, specifically: connecting a wedge-shaped steel block (53) with a steel cable sleeve (54) with two adjacent wheel teeth (52) by using a bolt (51) and a screw (50), and then connecting one end of the steel cable with the steel cable sleeve (54) by using epoxy resin adhesive;

and (7): a No. 1 support (75) and a No. 2 support (76) of a speed amplifying device (7) are fixed on the inner surface of a blade (10) by epoxy resin adhesive, 2 No. 1 steel cables (2) and a return spring (9) are additionally taken, after two ends of the return spring (9) are welded with one end of the 2 No. 1 steel cables (2), one end of the No. 1 steel cable (2) is connected to a gear rotating shaft (74) of the speed amplifying device (7) in a mode of step (6) (without winding), the other end of the No. 1 steel cable passes through 1 pull ring (1) which is stuck on the inner surface of the root part of the blade (10) by epoxy resin adhesive and is fixed by a buckle (11) matched with a friction sleeve (12), then, one end of the damper (80) is arranged in a circular hole of the vertical rail (71) of the speed amplification device (7), the other end of the damper is welded on the blade bottom plate (8), and the integral installation is completed; after the installation is finished, the axis of the No. 2 steel cable (5) is parallel to the axis of the blade, all components are in a stable state, and the No. 1 steel cable (2) of the return spring (9) is in a tensioned initial state.

Technical Field

The invention relates to the technical field of vibration reduction control of wind power generation structures, in particular to a wind power blade multi-mass-point series connection speed amplification type vibration reduction technology.

Background

Wind energy has been favored by countries all over the world as a renewable clean energy source, according to the annual report of the global wind energy institute (GWEC), the newly installed capacity of a world fan in 2019 reaches 60.4GW, and the increase potential is still strong after 63.8GW in 2015, so that wind generator towers and blades are developed to be higher and longer in order to better acquire wind energy. However, in the process of increasing the size of the blade, the weight and length of the blade are increased, and the load to be borne is complex, mainly including the gravity load, the inertia load and the unsteady aerodynamic load. The blades are easy to generate multidirectional vibration under the action of complex load, but as a key part for capturing wind energy, the performance of the blades directly influences the wind energy utilization efficiency of a wind turbine structure and the load borne by the whole wind turbine unit, and the overall performance, the service life and the economic performance for developing the wind energy of the unit are also determined to a great extent. Therefore, reducing the multi-directional vibration of the blade under the action of complex load is a key problem which must be solved by the structure of the wind turbine.

In order to achieve the aim of multidirectional vibration reduction of the blade, a series of hollow mass steel balls are arranged inside the blade, the hollow mass steel balls close to the blade tip are driven to vibrate when the blade tip vibrates, then each hollow mass steel ball can control the vibration of the front hollow mass steel ball, and the effect of multi-level vibration reduction is achieved. Meanwhile, the steel cable can be stretched when the hollow mass steel balls connected in series vibrate, and the steel cable fixed between the two fixed pulleys can also be stretched in any direction, so that the speed amplifying device acts to increase damping, and the aim of multi-directional vibration reduction is fulfilled. In the aspect of materials, materials with light weight, high strength, high energy consumption and high durability are needed under the condition that the wind power blade is not excessively increased in mass and damaged. The light high-strength steel cable has the advantages of light weight and high tensile strength, and can effectively reduce the weight of the vibration damper under the condition of ensuring firm connection; the epoxy resin adhesive with higher shear strength (> 25 MPa), tensile strength (> 33 MPa) and uneven tear strength (> 40 kN/m) at room temperature can directly adhere the pull ring to the inner surface of the blade without damaging the blade; the latex is one of the viscoelastic materials, can absorb part of energy in the collision process to achieve the energy consumption effect, and has strong energy consumption capability; the porous bolt ball joint with small volume and light weight can connect three strands of No. 1 steel cables with one strand of No. 2 steel cables, and has the advantages of simple structure, convenient connection and definite force transmission. Therefore, the materials are applied to the vibration reduction control device of the wind power blade, the damping is increased through a reasonable connection mode and the speed amplification device, the multi-directional vibration of the blade under the complex load action can be effectively controlled under the condition that the mass of the wind power blade is not excessively increased and the blade is not damaged, and therefore the vibration reduction device with the multiple mass points connected in series and the connection method of the vibration reduction device are provided.

Disclosure of Invention

The invention aims to provide a wind power blade multi-mass-point series speed amplification type vibration damper and a connection method.

The invention relates to a wind power blade multi-mass-point series speed amplification type vibration damper and a connection method, wherein the wind power blade multi-mass-point series speed amplification type vibration damper comprises a pull ring 1, a No. 1 steel cable 2, a porous bolt ball joint 3, hollow mass steel balls 4, a No. 2 steel cable 5, a fixed pulley device 6, a speed amplification device 7, a return spring 9 and 4 pull rings 1; the porous bolt ball joint 3 is composed of a No. 1 steel cable screw hole 30, a No. 1 steel cable screw rod 31, a No. 2 steel cable screw hole 32 and a No. 2 steel cable screw rod 33, and is connected with the No. 1 steel cable screw hole 30 and the No. 1 steel cable screw rod 31 through the No. 1 steel cable screw hole, and the No. 2 steel cable screw hole 32 is connected with the No. 2 steel cable screw rod 33 to form the porous bolt ball joint 3; the number of the fixed pulley devices 6 is 1, and the fixed pulley devices are composed of 2 symmetrical and tangential fixed pulleys 61 which are anchored on a fixed plate 63 through a flange shaft 60 and a fixed nut 62; the speed amplifying device 7 comprises a No. 1 support 75, a No. 2 support 76, a gear rotating shaft 74, a rotating disc 73, a cross track 72, a vertical track 71, a sliding block 70, a No. 1 pull rod 77, a No. 2 pull rod 78, a No. 3 pull rod 79 and a damper 80; mounting holes 82 are respectively preset at the two ends and the central position of the No. 1 pull rod 77, and the mounting holes 82 are respectively preset at the two ends of the No. 2 pull rod 78 and the No. 3 pull rod 79; the No. 1 support 75 and the No. 2 support 76 have the same structure and different installation positions; a bolt hole is reserved on each gear tooth 52 on the gear rotating shaft 74; one end of a horizontal rail of the cross rail 72 is welded on the side surface of the vertical rail 71, the other end of the horizontal rail is welded on the bottom plate of the No. 2 support 76, and the horizontal rail, the vertical rail and the vertical rail 71 of the cross rail 72 are respectively provided with the sliding block 70; a circular hole is reserved at one end of the vertical rail 71, one end of the damper 80 penetrates through the circular hole, and the other end of the damper is welded on the blade bottom plate 8 perpendicular to the vertical rail 71; a mounting hole 82 at one end of the No. 3 pull rod 79 is mounted on the sliding block 70 of the vertical rail 71 through a round T-shaped key 81, and a mounting hole 82 at the other end of the No. 3 pull rod is mounted on the No. 2 pull rod 78 through a round T-shaped key 81; mounting holes 82 at two ends of the No. 1 pull rod 77 and the No. 2 pull rod 78 are respectively and symmetrically mounted on 2 sliding blocks 70 arranged in a horizontal rail and a vertical rail of the cross rail 72 through round T-shaped keys 81, a mounting hole 82 preset in the center position of the No. 1 pull rod 77 is connected with the circumferential edge of one surface of the rotary disc 73 through the round T-shaped keys 81 on the rotary disc 73, the center position of the other surface of the rotary disc 73 is welded at one end of the gear rotating shaft 74, the gear rotating shaft 74 is sleeved in the No. 2 support 76 and the No. 1 support 75 after being welded with the rotary disc 73, and a circular end plate is.

The invention discloses a connecting method of a wind power blade multi-mass-point series speed amplification type vibration damper, which comprises the following steps:

step (1): taking 3 No. 1 steel cables 2, penetrating one end of each steel cable 2 through 3 pull rings 1 which are adhered to the inner surface of the blade tip by epoxy resin adhesive, fixing the pull rings by ring buckles 11 matched with friction sleeves 12, and connecting the other end of each steel cable 2 with a No. 1 steel cable screw 31 by the epoxy resin adhesive;

step (2): screwing 3 No. 1 steel cable screw rods 31 into No. 1 steel cable screw holes 30 of the porous bolt ball joint 3, taking 1 No. 2 steel cables 5, connecting one end of each No. 2 steel cable screw rod 33 with an epoxy resin adhesive, and screwing the end into No. 2 steel cable screw holes 32 of the porous bolt ball joint 3 after connection; the other end is connected with a hollow mass steel ball screw rod 41 by an epoxy resin adhesive;

and (3): screwing the other end of the No. 2 steel cable 5 in the step (2) into the hollow mass steel ball screw hole 43 of 1 hollow mass steel ball 4, taking 2 hollow mass steel balls 4 and 2 No. 2 steel cables 5, and connecting the No. 2 steel cables 5 with hollow mass steel ball screws 41 at two ends with 3 hollow mass steel balls in the same way;

and (4): another longer No. 2 steel cable 5 is taken, and one end of the other steel cable is connected with a hollow mass steel ball screw rod 41 through an epoxy resin adhesive and then screwed into the last hollow mass steel ball screw hole 43;

and (5): the fixed pulley 61 is connected through the flange shaft 60, the other same fixed pulley 61 is also connected in the same way, the two assembled fixed pulleys are symmetrically and tangentially fixed on the fixed plate 63 through the flange shaft 60 and the fixing nut 62, and finally the fixed plate 63 is adhered to the inner wall of the wind power blade 10 through epoxy resin adhesive to form the fixed pulley device 6;

and (6): the other end of the steel cable No. 25 in the step (4) passes through the fixed pulley device 6 assembled and fixed in the step (5) and then is wound and fixed on the gear rotating shaft 74 of the speed amplifying device 7, and a bolt hole is reserved in each gear tooth 52 on the gear rotating shaft 74, so that the connecting position of the steel cable can be flexibly adjusted, specifically: connecting a wedge-shaped steel block 53 with a steel cable sleeve 54 with two adjacent wheel teeth 52 by using a bolt 51 matched with a screw 50, and then connecting one end of the steel cable with the steel cable sleeve 54 by using epoxy resin adhesive;

and (7): fixing a No. 1 support 75 and a No. 2 support 76 of a speed amplifying device 7 on the inner surface of a blade 10 by using an epoxy resin adhesive, taking 2 No. 1 steel cables 2 and a return spring 9, welding two ends of the return spring 9 and one end of each 2 No. 1 steel cable 2, connecting the No. 1 steel cable 2 at one end to a gear rotating shaft 74 of the speed amplifying device 7 in a step (6) mode (without winding), fixing the other end of the return spring by using a ring buckle 11 to match a friction sleeve 12 after penetrating 1 pull ring 1 which is adhered to the inner surface of the root of the blade 10 by using the epoxy resin adhesive, and then installing one end of a damper 80 in a circular hole of a vertical rail 71 of the speed amplifying device 7 and welding the other end of the damper on a blade bottom plate 8 to finish the integral installation; after the installation is finished, the axes of the No. 2 steel cable 5 and the blade are parallel to each other, all the components are in a stable state, and the No. 1 steel cable 2 of the return spring 9 is in a tensioned initial state.

Compared with the prior art, the invention has the following advantages: 1. the wind power blade vibration damping device has the function of improving the damping. The speed amplifying device can indirectly increase the damping, the stronger the vibration is, the larger the damping is, the blades drive the hollow mass steel balls to vibrate when vibrating, thereby stretching the steel cable to rotate the gear rotating shaft, the gear rotating shaft with smaller radius drives the turntable with larger radius to rotate, under the condition of the same angular velocity, the linear velocity of the edge of the turntable is larger, so the speed is improved, the No. 1 pull rod on the turntable obtains the speed to drive the No. 2 pull rod to obtain the same speed, the No. 2 pull rod drives the No. 3 pull rod to move, the motion track of the joint of the No. 3 pull rod and the No. 2 pull rod is an ellipse, the linear velocity is further improved, thereby improving the speed of the slide block on the vertical track, the slide block of the vertical track compresses the damper at high speed to play a role in improving the damping, the stronger the vibration, the faster the cable is stretched, and the faster the spindle and turntable rotate, the greater the damping that can be provided;

2. the wind power blade vibration damping device can play a role in multi-layer and multi-direction vibration damping. The blade tip drives the hollow mass steel ball close to the blade tip to vibrate when vibrating, and each hollow mass steel ball can limit the vibration of the front hollow mass steel ball to achieve the effect of multi-layer vibration reduction;

3. the wind power blade vibration damping device has a self-resetting function and can be used for a long time. After the steel cable pulls the gear rotating shaft to rotate, the return spring at the root of the blade is also stretched, and after the vibration is recovered, the stretched return spring can drive the gear rotating shaft to rotate, so that the steel cable is recovered to the initial position, and the return spring can rapidly absorb energy through stretching, thereby reducing the vibration of the blade;

4. the wind power blade vibration damping device has small damage to the whole structure of the wind turbine. The connecting material and the force transmission component adopt epoxy resin adhesive and light high-strength steel cables, the connecting strength is high, the weight is light, the blades are not damaged, meanwhile, the speed amplification device is arranged at the root of the blades, and the influence of the gravity and the centrifugal force of the whole device on the starting wind speed of the blades and the influence on the bending moment and the torque generated by the hub are small;

5. the wind power blade vibration damper is convenient to connect, strong in controllability and small in steel cable vibration. The connecting points are connected through the pull ring, the porous bolt ball joint, the hollow mass steel ball and the bolt, the operation is simple, the connection is convenient, the gear teeth on the gear rotating shaft of the speed amplifying device are provided with the bolt holes, the connecting position of the cable head of the steel cable and the winding number of the steel cable on the gear rotating shaft can be designed according to the requirement, the two fixed pulleys are fixed on the inner wall of the wind power blade, and the steel cable penetrates through the middle of the two fixed pulleys which are symmetrical and tangent, so the vibration of the wind power blade can be;

6. the parts related to the wind power blade vibration damping device can be easily realized by using the current processing technology, and are assembled on site after being correspondingly manufactured in a factory, so that the wind power blade vibration damping device is high in processing performance and high in connectivity.

Drawings

Fig. 1 is a schematic sectional view showing a speed amplification device according to the present invention after completion of internal connection, fig. 2 is a schematic sectional view showing a three-dimensional assembly effect of the speed amplification device according to the present invention, fig. 3 is a schematic sectional view showing a connection of components of the speed amplification device according to the present invention, fig. 4 is a schematic sectional view showing a three-dimensional assembly effect of a fixed pulley device according to the present invention, fig. 5 is a schematic sectional view showing a gear rotating shaft of the speed amplification device according to the present invention, fig. 6 is a schematic sectional view showing a connection of a pull ring and a steel cable No. 1 according to the present invention, fig. 7 is a schematic sectional. Wherein, 1: a pull ring, 2: steel cord No. 1, 3: porous bolt ball joint, 4: hollow mass steel ball, 5: steel cord No. 2, 6: fixed pulley device, 7: speed amplification device, 8: blade base plate, 9: return spring, 10: blade, 11: buckle, 12: friction sleeve, 30: steel cable screw No. 1, 31: no. 1 wire screw, 32: no. 2 wire rope screw hole, 33: no. 2 wire screw, 40: solid steel ball, 41: hollow mass steel ball screw, 42: solid latex ball, 43: hollow quality steel ball screw, 50: screw, 51: screw, 52: gear teeth, 53: wedge steel block, 54: wire rope sleeve, 60: flange shaft, 61: fixed pulley, 62: fixing nut, 63: fixing plate, 70: slider, 71: vertical rail, 72: cross rail, 73: turntable, 74: gear shaft, 75: support No. 1, 76: no. 2 support, 77: no. 1 pull rod, 78: no. 2 pull rod, 79: no. 3 tie rod, 80: damper, 81: round T-shaped key, 82: and (7) installing holes.

Detailed Description

As shown in fig. 1 to 8, the wind power blade multi-mass-point series speed amplification type vibration damping device comprises a pull ring 1, a No. 1 steel cable 2, a porous bolt ball joint 3, a hollow mass steel ball 4, a No. 2 steel cable 5, a fixed pulley device 6, a speed amplification device 7, a return spring 9, and 4 pull rings 1; the porous bolt ball joint 3 is composed of a No. 1 steel cable screw hole 30, a No. 1 steel cable screw rod 31, a No. 2 steel cable screw hole 32 and a No. 2 steel cable screw rod 33, and is connected with the No. 1 steel cable screw hole 30 and the No. 1 steel cable screw rod 31 through the No. 1 steel cable screw hole, and the No. 2 steel cable screw hole 32 is connected with the No. 2 steel cable screw rod 33 to form the porous bolt ball joint 3; the number of the fixed pulley devices 6 is 1, and the fixed pulley devices are composed of 2 symmetrical and tangential fixed pulleys 61 which are anchored on a fixed plate 63 through a flange shaft 60 and a fixed nut 62; the speed amplifying device 7 comprises a No. 1 support 75, a No. 2 support 76, a gear rotating shaft 74, a rotating disc 73, a cross track 72, a vertical track 71, a sliding block 70, a No. 1 pull rod 77, a No. 2 pull rod 78, a No. 3 pull rod 79 and a damper 80; mounting holes 82 are respectively preset at the two ends and the central position of the No. 1 pull rod 77, and the mounting holes 82 are respectively preset at the two ends of the No. 2 pull rod 78 and the No. 3 pull rod 79; the No. 1 support 75 and the No. 2 support 76 have the same structure and different installation positions; a bolt hole is reserved on each gear tooth 52 on the gear rotating shaft 74; one end of a horizontal rail of the cross rail 72 is welded on the side surface of the vertical rail 71, the other end of the horizontal rail is welded on the bottom plate of the No. 2 support 76, and the horizontal rail, the vertical rail and the vertical rail 71 of the cross rail 72 are respectively provided with the sliding block 70; a circular hole is reserved at one end of the vertical rail 71, one end of the damper 80 penetrates through the circular hole, and the other end of the damper is welded on the blade bottom plate 8 perpendicular to the vertical rail 71; a mounting hole 82 at one end of the No. 3 pull rod 79 is mounted on the sliding block 70 of the vertical rail 71 through a round T-shaped key 81, and a mounting hole 82 at the other end of the No. 3 pull rod is mounted on the No. 2 pull rod 78 through a round T-shaped key 81; mounting holes 82 at two ends of the No. 1 pull rod 77 and the No. 2 pull rod 78 are respectively and symmetrically mounted on 2 sliding blocks 70 arranged in a horizontal rail and a vertical rail of the cross rail 72 through round T-shaped keys 81, a mounting hole 82 preset in the center position of the No. 1 pull rod 77 is connected with the circumferential edge of one surface of the rotary disc 73 through the round T-shaped keys 81 on the rotary disc 73, the center position of the other surface of the rotary disc 73 is welded at one end of the gear rotating shaft 74, the gear rotating shaft 74 is sleeved in the No. 2 support 76 and the No. 1 support 75 after being welded with the rotary disc 73, and a circular end plate is.

As shown in fig. 1 to 8, 3 steel cables 2 and 4 steel cables 5 are provided for the steel cable No. 1 and the steel cable No. 2, and the two steel cables are made of the same material, and the ratio of the diameter of the steel cable No. 1 to the diameter of the steel cable No. 2 is 1/3.

As shown in fig. 1 and 8, 3 hollow mass steel balls 4 are provided, 1 solid steel ball 40 and 1 solid emulsion ball 42 are placed in each hollow mass steel ball 4, and 2 hollow mass steel ball screw holes 43 are symmetrically arranged in each hollow mass steel ball 4 and are respectively connected with 2 hollow mass steel ball screws 41.

As shown in FIGS. 1 and 8, the ratio of the hollow volume in the hollow mass steel ball 4 to the sum of the volumes of 1 solid steel ball 40 and 1 solid latex ball 42 is greater than 4.

As shown in fig. 1 to 3, two ends of the No. 1 pull rod 77 and the No. 2 pull rod 78 are connected to the same slide block 70 in pairs, so as to realize synchronous operation and keep parallel with the cross rail 72.

As shown in fig. 1 to 3, the slider 70 and the mounting hole 82 are connected by a round T-shaped key 81, and the round T-shaped key 81 and the mounting hole 82 have the same height and can be completely fitted.

As shown in fig. 1 to 3, the connection position of the No. 2 pull rod 78 and the No. 3 pull rod 79 is located at 1/3, which is a short section of the No. 2 pull rod 78 near the horizontal rail of the cross rail 72.

As shown in fig. 1 to 8, the connection method of the wind power blade multi-mass-point series speed amplification type vibration damper of the invention comprises the following steps:

step (1): taking 3 No. 1 steel cables 2, penetrating one end of each steel cable 2 through 3 pull rings 1 which are adhered to the inner surface of the blade tip by epoxy resin adhesive, fixing the pull rings by ring buckles 11 matched with friction sleeves 12, and connecting the other end of each steel cable 2 with a No. 1 steel cable screw 31 by the epoxy resin adhesive;

step (2): screwing 3 No. 1 steel cable screw rods 31 into No. 1 steel cable screw holes 30 of the porous bolt ball joint 3, taking 1 No. 2 steel cables 5, connecting one end of each No. 2 steel cable screw rod 33 with an epoxy resin adhesive, and screwing the end into No. 2 steel cable screw holes 32 of the porous bolt ball joint 3 after connection; the other end is connected with a hollow mass steel ball screw rod 41 by an epoxy resin adhesive;

and (3): screwing the other end of the No. 2 steel cable 5 in the step (2) into the hollow mass steel ball screw hole 43 of 1 hollow mass steel ball 4, taking 2 hollow mass steel balls 4 and 2 No. 2 steel cables 5, and connecting the No. 2 steel cables 5 with hollow mass steel ball screws 41 at two ends with 3 hollow mass steel balls in the same way;

and (4): another longer No. 2 steel cable 5 is taken, and one end of the other steel cable is connected with a hollow mass steel ball screw rod 41 through an epoxy resin adhesive and then screwed into the last hollow mass steel ball screw hole 43;

and (5): the fixed pulley 61 is connected through the flange shaft 60, the other same fixed pulley 61 is also connected in the same way, the two assembled fixed pulleys are symmetrically and tangentially fixed on the fixed plate 63 through the flange shaft 60 and the fixing nut 62, and finally the fixed plate 63 is adhered to the inner wall of the wind power blade 10 through epoxy resin adhesive to form the fixed pulley device 6;

and (6): the other end of the steel cable No. 25 in the step (4) passes through the fixed pulley device 6 assembled and fixed in the step (5) and then is wound and fixed on the gear rotating shaft 74 of the speed amplifying device 7, and a bolt hole is reserved in each gear tooth 52 on the gear rotating shaft 74, so that the connecting position of the steel cable can be flexibly adjusted, specifically: connecting a wedge-shaped steel block 53 with a steel cable sleeve 54 with two adjacent wheel teeth 52 by using a bolt 51 matched with a screw 50, and then connecting one end of the steel cable with the steel cable sleeve 54 by using epoxy resin adhesive;

and (7): fixing a No. 1 support 75 and a No. 2 support 76 of a speed amplifying device 7 on the inner surface of a blade 10 by using an epoxy resin adhesive, taking 2 No. 1 steel cables 2 and a return spring 9, welding two ends of the return spring 9 and one end of each 2 No. 1 steel cable 2, connecting the No. 1 steel cable 2 at one end to a gear rotating shaft 74 of the speed amplifying device 7 in a step (6) mode (without winding), fixing the other end of the return spring by using a ring buckle 11 to match a friction sleeve 12 after penetrating 1 pull ring 1 which is adhered to the inner surface of the root of the blade 10 by using the epoxy resin adhesive, and then installing one end of a damper 80 in a circular hole of a vertical rail 71 of the speed amplifying device 7 and welding the other end of the damper on a blade bottom plate 8 to finish the integral installation; after the installation is finished, the axes of the No. 2 steel cable 5 and the blade are parallel to each other, all the components are in a stable state, and the No. 1 steel cable 2 of the return spring 9 is in a tensioned initial state.

As shown in figure 1, the invention relates to a wind power blade multi-mass-point series speed amplification type vibration damper and a connection method thereof, and the wind power blade multi-mass-point series speed amplification type vibration damper is an integral device which is composed of a pull ring 1, a No. 1 steel cable 2, a porous bolt ball joint 3, a hollow mass steel ball 4, a No. 2 steel cable 5, a fixed pulley device 6, a speed amplification device 7, a blade bottom plate 8, a return spring 9 and a blade 10. 3 steel cables No. 1 penetrate through 3 pull rings 1 adhered to the inner wall of the blade tip and are fixed, the other end of each pull ring is connected with a porous bolt ball joint 3, then the porous bolt ball joint 3 is connected with 3 hollow mass steel balls 4 through a steel cable No. 2, the steel cable No. 2 after the hollow mass steel balls 4 are connected penetrates through a fixed pulley device 6 and is connected with a speed amplification device 7 fixed on the inner wall of the root of the blade 10, a reset spring 9 at the root of the blade is connected to the speed amplification device 7 through the steel cable No. 1, and the other end of the reset spring penetrates through the pull ring 1 adhered to the inner wall of the root of the blade 10 and is fixed.

As shown in fig. 2 and 3, the speed amplification device 7 is composed of a No. 1 support 75, a No. 2 support 76, a gear rotating shaft 74, a turntable 73, a cross rail 72, a vertical rail 71, a sliding block 70, a No. 1 pull rod 77, a No. 2 pull rod 78, a No. 3 pull rod 79 and a damper 80, wherein mounting holes 82 are respectively preset at two ends and a central position of the No. 1 pull rod 77, and mounting holes 82 are respectively preset at two ends of the No. 2 pull rod 78 and the No. 3 pull rod 79; the No. 1 support 75 and the No. 2 support 76 have the same structure and different installation positions; bolt holes are reserved in each gear tooth on the gear rotating shaft 74; one end of a horizontal rail of the cross rail 72 is welded on the side surface of the vertical rail 71, the other end of the horizontal rail is welded on the bottom plate of the No. 2 support 76, and the horizontal rail, the vertical rail and the vertical rail 71 of the cross rail 72 are respectively provided with the sliding block 70; a circular hole is reserved at one end of the vertical rail 71, one end of the damper 80 penetrates through the circular hole, and the other end of the damper is welded on the blade bottom plate 8 perpendicular to the vertical rail 71; a mounting hole 82 at one end of the No. 3 pull rod 79 is mounted on the sliding block 70 of the vertical rail 71 through a round T-shaped key 81, and a mounting hole 82 at the other end of the No. 3 pull rod is mounted on the No. 2 pull rod 78 through a round T-shaped key 81; mounting holes 82 at two ends of the No. 1 pull rod 77 and the No. 2 pull rod 78 are respectively and symmetrically mounted on 2 sliding blocks 70 arranged in a horizontal rail and a vertical rail of the cross rail 72 through round T-shaped keys 81, a mounting hole 82 preset in the center position of the No. 1 pull rod 77 is connected with the circumferential edge of one surface of the rotary disc 73 through the round T-shaped keys 81 on the rotary disc 73, the center position of the other surface of the rotary disc 73 is welded at one end of the gear rotating shaft 74, the gear rotating shaft 74 is sleeved in the No. 2 support 76 and the No. 1 support 75 after being welded with the rotary disc 73, and a circular end plate is.

As shown in fig. 4, the fixed pulley device 6 is connected with a fixed pulley 61 through a flange shaft 60 of the fixed pulley, another same fixed pulley 61 is also connected with the fixed pulley, two assembled fixed pulleys are symmetrically and tangentially fixed on a fixing plate 63 through the flange shaft 60 and a fixing nut 62, and finally the fixing plate 63 is adhered to the inner wall of the wind power blade 10 through epoxy resin adhesive to form the fixed pulley device 6.

As shown in fig. 5, one end of the gear shaft 74 is welded on the turntable 73, and the connection between the gear shaft 74 and the No. 2 steel cable 5 and between the gear shaft 74 and the return spring 9 welded with the No. 1 steel cable 2 is as follows: the screw rod 51 penetrates through two adjacent teeth 52 and the wedge-shaped steel block 53 and then is fixed by the screw 50, the steel cable sleeve 54 is welded on the wedge-shaped steel block 53, a certain space is reserved between the wedge-shaped steel block 53 and the rotating shaft, the cable head can rotate freely, and the stress of the steel cable is more reasonable.

As shown in fig. 6, the steel cable No. 12 is fixed by a buckle 11 after passing through the pull ring 1 by a friction sleeve 12.

As shown in fig. 7, the multi-hole bolt ball joint 3 is composed of a steel cable screw hole 1 30, a steel cable screw rod 1, a steel cable screw hole 2, and a steel cable screw rod 2 33, and is formed by connecting the steel cable screw hole 1 30 with the steel cable screw rod 1, and connecting the steel cable screw hole 2 with the steel cable screw rod 2 33.

As shown in fig. 8, a solid steel ball 40 and a solid emulsion ball 42 are placed inside the hollow mass steel ball 4, and two hollow mass steel ball screw holes 43 are symmetrically arranged inside the hollow mass steel ball and can be connected with a hollow mass steel ball screw 41.

The invention discloses a wind power blade multi-mass-point series speed amplification type vibration damper and a connection method, which comprises the following specific steps:

(1): taking 3 No. 1 steel cables 2, penetrating one end of each steel cable 2 through 3 pull rings 1 which are adhered to the inner surface of the blade tip by epoxy resin adhesive, fixing the pull rings by ring buckles 11 matched with friction sleeves 12, and connecting the other end of each steel cable 2 with a No. 1 steel cable screw 31 by the epoxy resin adhesive;

(2): screwing 3 No. 1 steel cable screw rods 31 into No. 1 steel cable screw holes 30 of the porous bolt ball joint 3, taking 1 No. 2 steel cables 5, connecting one end of each No. 2 steel cable screw rod 33 with an epoxy resin adhesive, and screwing the end into No. 2 steel cable screw holes 32 of the porous bolt ball joint 3 after connection; the other end is connected with a hollow mass steel ball screw rod 41 by an epoxy resin adhesive;

(3): screwing the other end of the No. 2 steel cable 5 in the step (2) into the hollow mass steel ball screw hole 43 of 1 hollow mass steel ball 4, taking 2 hollow mass steel balls 4 and 2 No. 2 steel cables 5, and connecting the No. 2 steel cables 5 with hollow mass steel ball screws 41 at two ends with 3 hollow mass steel balls in the same way;

(4): another longer No. 2 steel cable 5 is taken, and one end of the other steel cable is connected with a hollow mass steel ball screw rod 41 through an epoxy resin adhesive and then screwed into the last hollow mass steel ball screw hole 43;

(5): the fixed pulley 61 is connected through the flange shaft 60, the other same fixed pulley 61 is also connected in the same way, the two assembled fixed pulleys are symmetrically and tangentially fixed on the fixed plate 63 through the flange shaft 60 and the fixing nut 62, and finally the fixed plate 63 is adhered to the inner wall of the wind power blade 10 through epoxy resin adhesive to form the fixed pulley device 6;

(6): the other end of the steel cable No. 25 in the step (4) passes through the fixed pulley device 6 assembled and fixed in the step (5) and then is wound and fixed on the gear rotating shaft 74 of the speed amplifying device 7, and a bolt hole is reserved in each gear tooth 52 on the gear rotating shaft 74, so that the connecting position of the steel cable can be flexibly adjusted, specifically: connecting a wedge-shaped steel block 53 with a steel cable sleeve 54 with two adjacent wheel teeth 52 by using a bolt 51 matched with a screw 50, and then connecting one end of the steel cable with the steel cable sleeve 54 by using epoxy resin adhesive;

(7): fixing a No. 1 support 75 and a No. 2 support 76 of a speed amplifying device 7 on the inner surface of a blade 10 by using an epoxy resin adhesive, taking 2 No. 1 steel cables 2 and a return spring 9, welding two ends of the return spring 9 and one end of each 2 No. 1 steel cable 2, connecting the No. 1 steel cable 2 at one end to a gear rotating shaft 74 of the speed amplifying device 7 in a step (6) mode (without winding), fixing the other end of the return spring by using a ring buckle 11 to match a friction sleeve 12 after penetrating 1 pull ring 1 which is adhered to the inner surface of the root of the blade 10 by using the epoxy resin adhesive, and then installing one end of a damper 80 in a circular hole of a vertical rail 71 of the speed amplifying device 7 and welding the other end of the damper on a blade bottom plate 8 to finish the integral installation; after the installation is finished, the axes of the No. 2 steel cable 5 and the blade are parallel to each other, all the components are in a stable state, and the No. 1 steel cable 2 of the return spring 9 is in a tensioned initial state.

The wind power blade vibration reduction device achieves the aim of multi-layer and multi-direction vibration reduction by installing the hollow mass steel balls connected in series in the wind power blade, arranging the solid steel ball and the solid latex ball in the hollow mass steel balls, and matching with the fixed pulley device and the speed amplification device. The blade drives the hollow mass steel ball close to the blade tip to vibrate when vibrating, and each hollow mass steel ball can limit the vibration of the front hollow mass steel ball to achieve the effect of multi-layer vibration reduction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.