Tow device for wind turbine variable pitch gearbox train adjustment process

Abstract

The application discloses a traction device for pitch gear box gear train adjustment process of a wind turbine, which comprises a frame, left and right two supports arranged on the frame, a transmission shaft rotatably connected to the supports, a rocking handle connected to the transmission shaft, a transmission gear mounted on the transmission shaft, a vertical rack and a vertical guide rail fixedly arranged on the frame, the transmission gear is located between the left and right two supports, the transmission gear is engaged with the rack, the guide rail is located at the rear side of the rack, the rack is connected with the guide rail through a guide sliding block, the lower end of the rack is connected with a lifting belt through a lifting ring, and the lower end of the lifting belt is connected with a universal lifting ring. The horizontal traction and reverse locking are implemented after the installation of the pitch gear box, so that the pitch gear box is prevented from slipping and falling off.

Description

Technical Field

[0001] This invention relates to the field of wind turbine generator assembly equipment technology, specifically to a megawatt-class wind turbine hub pitch gearbox gear system adjustment device. Background Technology

[0002] When large wind turbine blades adjust their pitch, the pitch gearbox drives the pitch bearing, which in turn drives the blades to achieve the pitch action. Due to the continuous increase in wind turbine power in recent years, the swept area of ​​the rotor has become larger, and the blades have become longer. In the design phase of wind turbines, to avoid interference between the blades and the tower during blade rotation, the angle of the hub web has been increased from the original 3° to 5° or even greater. This design directly results in a larger angle between the axis of the pitch gearbox and the horizontal plane after installation. During the adjustment of the gear train by rotating the pitch gearbox, it will cause the pitch gearbox to slip backward, increasing the installation difficulty, risk of detachment, and overall danger.

[0003] Therefore, there is an urgent need in the existing technology for a traction device used in the pitch gearbox gear system adjustment process of wind turbine generator sets, in order to overcome the problems of pitch gearbox slippage and detachment. Summary of the Invention

[0004] The present invention aims to overcome the problems of slippage and detachment of pitch gearboxes and provides a traction device for the pitch gearbox gear system adjustment process of wind turbine generator sets.

[0005] This invention is achieved through the following technical solution: a traction device for adjusting the gear train of a wind turbine generator pitch gearbox, comprising a frame, two left and right supports mounted on the frame, a drive shaft rotatably connected to the supports, a crank handle connected to the drive shaft, a drive gear mounted on the drive shaft, an upright rack, and an upright guide rail fixedly mounted on the frame. The drive gear is located between the two supports and meshes with the rack. The guide rail is located behind the rack. The rack is connected to the guide rail via a guide slider. The lower end of the rack is connected to a lifting strap via a lifting ring, and the lower end of the lifting strap is connected to a universal lifting ring.

[0006] It also includes an anti-reverse ratchet mechanism, which includes a ratchet and a pawl that connects and engages with the ratchet. A pawl connecting frame is fixedly connected to the side of the frame. The pawl is rotatably mounted on the pawl connecting frame via a spindle. One end of the drive shaft passes through a support and is connected to the ratchet.

[0007] A reset spring is connected between the spindle and the pawl connector.

[0008] The frame is provided with a support plate, and the guide rail is fixedly mounted on the support plate.

[0009] The rack is provided with two guide sliders, one above the other, and each guide slider is provided with a groove, with the guide rail located in the groove.

[0010] A bearing is provided between the support and the drive shaft.

[0011] The support includes a left frame, a right frame, and a connecting rod connecting the left frame and the right frame.

[0012] Both the left frame and the right frame include a crossbar, an upright fixedly installed below the front end of the crossbar, and a fixing plate fixedly installed at the lower end of the upright.

[0013] The fixing plate is provided with connection holes.

[0014] A support leg is fixedly installed at the lower rear end of the crossbar.

[0015] The beneficial effects of this invention are: after the pitch gearbox is installed, the invention implements horizontal traction and reverse locking to prevent the pitch gearbox from slipping or falling off. Attached Figure Description

[0016] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a second-view three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a structural schematic diagram of the working process of the present invention.

[0019] In the diagram: 1-Fixed plate; 2-Frame; 3-Support; 4-Pawl connector; 5-Ratchet; 6-Drive gear; 7-Handle; 8-Bearing; 9-Rack; 10-Guide slider; 11-Guide rail; 12-Drive shaft; 13-Pawl; 14-Connecting hole; 15-Upright post; 16-Horizontal bar; 17-Connecting rod; 18-Leg; 19-Pitch bearing outer ring; 20-Pitch gearbox output gear; 21-Threaded hole; 22-Hub. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figure 1 , Figure 2As shown, a traction device for adjusting the gear train of a wind turbine generator pitch gearbox includes a frame 2, two left and right supports 3 mounted on the frame 2, a drive shaft 12 rotatably connected to the supports 3, a crank handle 7 connected to the drive shaft 12, a drive gear 6 mounted on the drive shaft 12, an upright rack 9, and an upright guide rail 11 fixedly mounted on the frame 2. The drive gear 6 is located between the two supports 3 and meshes with the rack 9. The guide rail 11 is located behind the rack 9. The rack 9 is connected to the guide rail 11 through a guide slider 10. The lower end of the rack 9 is connected to a sling through a lifting ring, and the lower end of the sling is connected to a universal lifting ring.

[0022] See Figure 3 During operation, the invention is fixedly installed above the output gear 20 of the pitch gearbox. A threaded hole 21 is provided at the center of the output gear 20. The screw at the lower part of the universal joint is screwed into the threaded hole 21, connecting the universal joint to the output gear 20. Turning the crank handle 7 causes the drive shaft 12 to drive the drive gear 6, thereby driving the rack 9 to move upward along the guide rail 11. The lifting strap and universal joint provide an upward force to the output gear 20 of the pitch gearbox, preventing slippage of the pitch gearbox.

[0023] The present invention also includes an anti-reverse ratchet mechanism 5, which includes a ratchet 5 and a pawl 13 connected and engaged with the ratchet 5. A pawl connecting frame 4 is fixedly connected to the side of the frame 2. The pawl 13 is rotatably mounted on the pawl connecting frame 4 via a spindle. One end of the drive shaft 12 passes through a support 3 and is connected to the ratchet 5. With the engagement of the pawl 13 and the ratchet 5, the reverse rotation of the drive shaft 12 and the drive gear 6 can be prevented.

[0024] To improve the anti-reverse effect of the present invention, a reset snap ring is connected between the spindle and the pawl connecting frame 4.

[0025] See Figure 1 , Figure 2 The frame 2 is equipped with a support plate, and the guide rail 11 is fixedly mounted on the support plate. The rack 9 is equipped with two guide sliders 10, each with a groove, and the guide rail 11 is located in the groove. A bearing 8 is installed between the support 3 and the drive shaft 12.

[0026] See Figure 1 , Figure 2 The support frame includes a left frame 2, a right frame 2, and a connecting rod 17 connecting the left frame 2 and the right frame 2. Both the left frame 2 and the right frame 2 include a crossbar 16, an upright 15 fixedly installed below the front end of the crossbar 16, and a fixing plate 1 fixedly installed at the lower end of the upright 15. The fixing plate 1 has a connecting hole 14. A support leg 18 is fixedly installed below the rear end of the crossbar 16.

[0027] like Figure 3 As shown, during operation, the fixing plate 1 is located on the outer ring 19 of the pitch bearing. The fixing plate 1 is fixedly connected to the outer ring 19 of the pitch bearing by means of bolts and the connection holes 14 of the fixing plate 1 and the flange holes of the outer ring 19 of the pitch bearing. The outrigger 18 is supported on the hub 22.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A traction device for adjusting the gear train of a wind turbine generator pitch gearbox, characterized in that: The traction device for adjusting the gear train of the pitch gearbox of a wind turbine generator set includes a frame, two left and right supports mounted on the frame, a drive shaft rotatably connected to the supports, a crank connected to the drive shaft, a drive gear mounted on the drive shaft, a rack erected vertically, and a guide rail fixedly mounted on the frame. The drive gear is located between the two supports and meshes with the rack. The guide rail is located behind the rack. The rack is connected to the guide rail via a guide slider. The lower end of the rack is connected to a sling via a lifting ring, and the lower end of the sling is connected to a universal lifting ring. It also includes an anti-reverse ratchet mechanism, which includes a ratchet and a pawl that is connected and engaged with the ratchet. A pawl connecting frame is fixedly connected to the side of the frame. The pawl is rotatably mounted on the pawl connecting frame via a spindle. One end of the drive shaft passes through a support and is connected to the ratchet. A reset spring is connected between the spindle and the pawl connector; The rack is provided with two guide sliders, one above the other, and each guide slider is provided with a groove, with the guide rail located in the groove.

2. The traction device for adjusting the gear train of a wind turbine generator pitch gearbox according to claim 1, characterized in that: The frame is provided with a support plate, and the guide rail is fixedly mounted on the support plate.

3. The traction device for adjusting the gear train of a wind turbine generator pitch gearbox according to claim 1, characterized in that: A bearing is provided between the support and the drive shaft.

4. The traction device for adjusting the gear train of a wind turbine generator pitch gearbox according to claim 3, characterized in that: The support includes a left frame, a right frame, and a connecting rod connecting the left frame and the right frame.

5. The traction device for adjusting the gear train of a wind turbine generator pitch gearbox according to claim 4, characterized in that: Both the left frame and the right frame include a crossbar, an upright fixedly installed below the front end of the crossbar, and a fixing plate fixedly installed at the lower end of the upright.

6. The traction device for adjusting the gear train of a wind turbine generator pitch gearbox according to claim 5, characterized in that: The fixing plate is provided with connection holes.

7. The traction device for adjusting the gear train of a wind turbine generator pitch gearbox according to claim 6, characterized in that: A support leg is fixedly installed at the lower rear end of the crossbar.

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