Hoisting method of vertical axis wind turbine

Abstract

The invention discloses a hoisting method of a vertical axis wind turbine, which comprises the following steps of: connecting blades and a hub on the ground of an installation site to form a hub assembly, and installing an expandable laser positioning target plate and a guide roller at the bottom of the hub assembly; the tower drum is hoisted in a segmented mode through a crane, and all the tower drum segments are connected through hydraulic interlocking flanges; a four-column synchronous hydraulic jacking system is mounted on a platform at the top of the tower drum; the hub assembly slides to a jacking platform along the guide rail, a laser transmitter is started to scan a target plate, and the pose of the hub is adjusted in real time through an acousto-optic feedback system; and the hydraulic jacking system is started to lift the hub assembly to a preset height, so that the hub connecting conical surface is in contact with the conical surface of the generator spindle, and anti-shearing connection is completed. The hoisting mode of ground pre-assembling, hydraulic synchronous jacking and laser positioning guiding is adopted, ground assembling of 95% of assemblies is achieved, the high-altitude operation amount is reduced, the installation efficiency is improved, the installation precision is high, and the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation equipment installation, in particular to a method for hoisting a vertical axis wind power generator. Background Art

[0002] Because the tower of a vertical-axis wind turbine cannot serve as a hoisting track like a horizontal-axis wind turbine, the hoisting process is more complicated. Currently, there are two methods for hoisting vertical-axis wind turbines: one relies on a large crane for integral hoisting, which is costly; the other is to use segmented hoisting and assembly, which carries significant risks at high altitude and cannot accurately control installation precision.

[0003] Therefore, there is an urgent need to propose a vertical axis wind turbine hoisting method with high installation efficiency, high installation accuracy and low cost. Summary of the Invention

[0004] In response to the above problems, the present invention provides a method for hoisting a vertical axis wind turbine, which has the advantages of high installation efficiency, easy control of installation precision and low cost.

[0005] The technical solution adopted in the present invention is as follows:

[0006] A method for hoisting a vertical axis wind turbine comprises the following steps:

[0007] S1. Modular ground pre-assembly: Connect the blades and the hub to form a hub assembly on the ground at the installation site, and install a deployable laser positioning target plate and guide rollers at the bottom of the hub assembly;

[0008] S2. Segmented tower installation: The tower is hoisted in sections by crane, and each section of the tower is connected by hydraulic interlocking flanges. The radial expansion pressure of the flange is controlled at 25MPa-40MPa;

[0009] S3. Jacking system installation: Install a four-column synchronous hydraulic jacking system on the tower top platform;

[0010] S4. Dynamic positioning of the wheel hub assembly: slide the wheel hub assembly onto the lifting platform along a guide track with an inclination angle of 10°-20°, start the laser transmitter to scan the target plate, and adjust the wheel hub position in real time through the acoustic and optical feedback system to ensure that the docking axis deviation is ≤1mm;

[0011] S5. Bolt-free high-precision connection: Start the hydraulic jacking system to lift the hub assembly to a predetermined height, so that the hub connection cone surface contacts the generator main shaft cone surface, and apply 50MPa-55MPa axial pressure to achieve plastic deformation self-locking to complete the shear-resistant connection.

[0012] In a further technical solution, in step S1, laser positioning uses visible laser with a wavelength of 630nm-680nm to establish a three-dimensional coordinate system through rotation scanning.

[0013] In a further technical solution, each oil cylinder of the four-column synchronous hydraulic jacking system is equipped with an independent pressure sensor, which adjusts the oil pressure in real time so that the deviation of the jacking height of each column is ≤1mm.

[0014] In a further technical solution, the four-column synchronous hydraulic jacking system performs real-time pressure compensation.

[0015] In a further technical solution, when the wind speed is greater than 15 m / s, the four-column synchronous hydraulic jacking system automatically starts hydraulic locking.

[0016] In a further technical solution, in step S4, a magnetic damping device is provided on the guide rail, and the sliding speed is controlled to be 0.2 m / s-0.5 m / s.

[0017] In a further technical solution, in step S5, an axial pressure of 50 MPa-55 MPa is applied by a hydraulic system when the conical surface is locked, so that the contact surface undergoes a plastic deformation of 0.05 mm-0.1 mm to achieve an interference fit.

[0018] The beneficial effects of the present invention are:

[0019] The present invention adopts a hoisting method of ground pre-assembly + hydraulic synchronous jacking + laser positioning guidance, which can achieve ground assembly of 95% of components and reduce the amount of high-altitude work by 80%. It can greatly improve the installation efficiency, make it easier to control the installation accuracy, and reduce the hoisting cost compared with the existing technology. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below.

[0021] Example:

[0022] A method for hoisting a vertical axis wind turbine comprises the following steps:

[0023] S1. Modular ground pre-assembly: Connect the blades and the hub to form a hub assembly on the ground at the installation site, and install a deployable laser positioning target plate and guide rollers at the bottom of the hub assembly;

[0024] S2. Segmented tower installation: The tower is hoisted in sections by crane, and each section of the tower is connected by hydraulic interlocking flanges. The radial expansion pressure of the flange is controlled at 25MPa-40MPa;

[0025] S3. Jacking system installation: Install a four-column synchronous hydraulic jacking system on the tower top platform;

[0026] S4. Dynamic positioning of the wheel hub assembly: slide the wheel hub assembly onto the lifting platform along a guide track with an inclination angle of 10°-20°, start the laser transmitter to scan the target plate, and adjust the wheel hub position in real time through the acoustic and optical feedback system to ensure that the docking axis deviation is ≤1mm;

[0027] S5. Bolt-free high-precision connection: Start the hydraulic jacking system to lift the hub assembly to a predetermined height, so that the hub connection cone surface contacts the generator main shaft cone surface, and apply 50MPa-55MPa axial pressure to achieve plastic deformation self-locking to complete the shear-resistant connection.

[0028] In another embodiment, in step S1 , laser positioning uses visible laser with a wavelength of 630 nm-680 nm, and a three-dimensional coordinate system is established through rotation scanning.

[0029] In another embodiment, each oil cylinder of the four-column synchronous hydraulic jacking system is equipped with an independent pressure sensor, which adjusts the oil pressure in real time so that the deviation of the jacking height of each column is ≤1mm.

[0030] In another embodiment, the four-column synchronous hydraulic jacking system performs real-time pressure compensation.

[0031] In another embodiment, when the wind speed is greater than 15 m / s, the four-column synchronous hydraulic jacking system automatically starts hydraulic locking.

[0032] In another embodiment, in step S4, a magnetic damping device is provided on the guide rail, and the sliding speed is controlled to be 0.2 m / s-0.5 m / s.

[0033] In another embodiment, in step S5, an axial pressure of 50 MPa-55 MPa is applied by a hydraulic system when the conical surface is locked, so that the contact surface undergoes a plastic deformation of 0.05 mm-0.1 mm to achieve an interference fit.

[0034] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A method for hoisting a vertical axis wind turbine, characterized in that: The following steps are involved: S1. Modular ground pre-assembly: Connect the blades and the hub to form a hub assembly on the ground at the installation site, and install a deployable laser positioning target plate and guide rollers at the bottom of the hub assembly; S2. Segmented tower installation: The tower is hoisted in sections by crane, and each section of the tower is connected by hydraulic interlocking flanges. The radial expansion pressure of the flange is controlled at 25MPa-40MPa; S3. Jacking system installation: Install a four-column synchronous hydraulic jacking system on the tower top platform; S4. Dynamic positioning of the wheel hub assembly: slide the wheel hub assembly onto the lifting platform along a guide track with an inclination angle of 10°-20°, start the laser transmitter to scan the target plate, and adjust the wheel hub position in real time through the acoustic and optical feedback system to ensure that the docking axis deviation is ≤1mm; S5. Bolt-free high-precision connection: Start the hydraulic jacking system to lift the hub assembly to a predetermined height, so that the hub connection cone surface contacts the generator main shaft cone surface, and apply 50MPa-55MPa axial pressure to achieve plastic deformation self-locking to complete the shear-resistant connection.

2. The method for hoisting a vertical axis wind turbine according to claim 1, characterized in that: In step S1, laser positioning uses visible laser with a wavelength of 630nm-680nm to establish a three-dimensional coordinate system through rotation scanning.

3. The method for hoisting a vertical axis wind turbine according to claim 1, wherein: Each oil cylinder of the four-column synchronous hydraulic jacking system is equipped with an independent pressure sensor, which adjusts the oil pressure in real time to ensure that the jacking height deviation of each column is ≤1mm.

4. The method for hoisting a vertical axis wind turbine according to claim 1, wherein: The four-column synchronous hydraulic jacking system performs real-time pressure compensation.

5. The method for hoisting a vertical axis wind turbine according to claim 1, wherein: When the wind speed is greater than 15m / s, the four-column synchronous hydraulic jacking system automatically starts hydraulic locking.

6. The method for hoisting a vertical axis wind turbine according to claim 1, wherein: In step S4, a magnetic damping device is provided on the guide rail, and the sliding speed is controlled to be 0.2 m / s-0.5 m / s.

7. The method for hoisting a vertical axis wind turbine according to claim 1, wherein: In step S5, when the conical surface is locked, an axial pressure of 50 MPa to 55 MPa is applied through the hydraulic system to cause the contact surface to produce a plastic deformation of 0.05 mm to 0.1 mm to achieve an interference fit.