Drive chain inclination angle testing device and drive chain inclination angle testing method

Abstract

The present invention discloses a drive chain inclination testing device and a drive chain inclination testing method. The drive chain inclination testing device is used to test the inclination of the drive chain. The base tooling has a mounting surface. The drive chain is rotatably mounted on the base tooling. The drive chain can rotate within the plane where the mounting surface is located. The mounting surface has a preset inclination relative to the horizontal direction. The drive chain can rotate within the plane where the mounting surface is located to a first test position with a maximum forward inclination relative to the horizontal direction and a second test position with a maximum backward inclination relative to the horizontal direction. When the drive chain is mounted on the base tooling, the inclination of the drive chain can be changed by rotation and rotated to the first test position with a maximum forward inclination relative to the horizontal direction and the second test position with a maximum backward inclination relative to the horizontal direction, respectively, so that a set of tooling slings can complete the test of two inclination conditions, which greatly reduces the test cost, reduces the test process, and shortens the test period.

Description

Technical Field

[0001] The invention relates to the field of wind turbines, and in particular to a drive chain inclination angle testing device and a drive chain inclination angle testing method. Background Art

[0002] During the development process of floating units, it is necessary to conduct a drive chain inclination test to confirm that the drive chain can still operate normally under large inclination conditions. Since the shaking of the unit has two extreme conditions, forward inclination and backward inclination, at least two extreme inclination angles need to be tested. The existing drive chain inclination test requires the design of corresponding inclination tooling to fix the drive chain according to the inclination conditions required for the test. It is also necessary to design a hoisting device for lifting the drive chain at different inclination states to complete the inclination test tooling for lifting and lowering the drive chain. Two inclination tooling and two drive chain hoists must be designed for two inclination angles.

[0003] Figure 1 The tooling and hoisting equipment for the existing drive chain inclination test are shown. During the test, the drive chain inclination test of the first angle needs to be completed first, and then the original tooling needs to be removed and the drive chain test tooling of the second angle needs to be installed, and the drive chain inclination test of the second angle needs to be completed. Based on this, the existing test hoisting process needs to design and use two sets of tooling and hoisting equipment, which requires a lot of manpower, material resources and time costs. In addition, the two assembly of the drive chain also generates the inspection cost of fastener reuse. Two test conditions also need to prepare two test sites to install the test tooling, which leads to an increase in the number of supporting cables between the sites. In order to reduce the footprint, the two tooling can be switched at the same site, but because the chemical bolts for installing the tooling need to be drilled on site and wait for the gel to harden, it takes extra time to switch the tooling, which ultimately extends the entire test cycle. In addition, when the drive chain is lifted and adjusted to a larger inclination angle, the stress state of the drive chain lifting lug will change. The lifting lug suitable for small-angle lifting cannot withstand the forces in different directions during large-angle lifting. According to the existing test hoisting process, the lifting lug on the drive chain needs to be strengthened. Strengthening the lifting lugs requires changing the casting shape of the casting. Modifying the casting mold will not only incur expenses, but also affect the delivery of materials.

[0004] Therefore, the existing design of drive chain inclination test has high cost, complicated process and long construction period. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the drive chain inclination angle test in the prior art has high cost, complicated process and long construction period. Based on this, a drive chain inclination angle test device and a drive chain inclination angle test method are provided.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A drive chain inclination test device, which is used to perform an inclination test on a drive chain, is characterized in that it comprises:

[0008] A base tooling, wherein the base tooling has a mounting surface, the drive chain is rotatably mounted on the base tooling, and the drive chain can rotate within the plane where the mounting surface is located;

[0009] The mounting surface has a preset inclination angle relative to the horizontal direction, and the drive chain can rotate within the plane where the mounting surface is located to a first test position with a maximum forward inclination angle relative to the horizontal direction and a second test position with a maximum backward inclination angle relative to the horizontal direction;

[0010] When the drive chain is in the first test position, the front end of the drive chain is lower than the rear end of the drive chain. When the drive chain is in the second test position, the front end of the drive chain is higher than the rear end of the drive chain.

[0011] In this solution, the above structure is adopted, the base fixture of the drive chain inclination test equipment is rotatably connected to the drive chain, the base fixture has a preset inclination, and when the drive chain is installed on the base fixture, the inclination of the drive chain can be changed by rotation and rotated to the first test position with the maximum forward inclination relative to the horizontal direction and the second test position with the maximum backward inclination relative to the horizontal direction. This allows a set of tooling and lifting equipment to complete the test of two inclination conditions, greatly reducing the test cost, reducing the test process, and shortening the test period.

[0012] Preferably, the maximum forward tilt angle or the maximum backward tilt angle is the same as the preset tilt angle.

[0013] In this solution, the above structure is adopted, and the preset inclination angle of the mounting surface of the base fixture is the same as one of the maximum forward inclination angle or the maximum backward inclination angle of the test. During lifting, it can be lifted directly at the maximum forward inclination angle or the maximum backward inclination angle. After the lifting is completed, one of the angles can be tested directly, shortening the test process. Preferably, a yaw system is installed on the mounting surface, and the drive chain is installed on the base fixture through the yaw system. A front frame is also provided between the drive chain and the yaw system, and the drive chain is rotatably connected to the yaw system through the front frame. The mounting surface, the yaw system, the front frame and the drive chain are connected in sequence from bottom to top;

[0014] Preferably, the front frame has an initial elevation angle, and the angle of the maximum backward tilt angle is the sum of the angle of the preset tilt angle and the initial elevation angle;

[0015] The angle of the maximum forward tilt angle is the difference between the preset tilt angle and the initial elevation angle.

[0016] In this solution, the above structure is adopted, and the yaw system is a system that can rotate the drive chain when the wind turbine is working normally. The yaw system is installed on the base fixture, and the inclination angle of the drive chain in the test is changed by the rotation function of the yaw system itself. The front frame and the yaw system itself are part of the unit, which will continue to be used as part of the product after the test is completed, reducing the waste of structural parts invested in the inclination test. In addition, the initial elevation angle of the front frame is used, so that it can be lifted at a smaller angle during lifting, and the requirements for the lifting equipment are lower.

[0017] Preferably, the yaw system is electrically connected to the base tooling.

[0018] In this solution, the above structure is adopted, and the yaw system is directly electrically connected to the base tooling, without the need for additional wiring for the yaw system, thereby facilitating its rotation.

[0019] Preferably, the base tooling comprises a tooling body and a reinforcement portion, the tooling body is a cylindrical structure, and the reinforcement portions are respectively arranged on both sides of the cylindrical structure along the inclination direction of the mounting surface.

[0020] In this solution, the above structure is adopted, and the function of the base fixture is to ensure that the yaw system and the ground are relatively still during the entire test process. The tower structure of the reference unit is usually a cylindrical barrel structure, so the main body of the fixture adopts a barrel structure as the main support. However, the upper and lower connecting flange surfaces of a normal tower are horizontal structures, while the upper and lower connecting flange surfaces of the inclination test fixture are not horizontal. In order to ensure that the fixture still has sufficient strength under the two extreme conditions of forward and backward tilt of the drive chain, it is necessary to appropriately add reinforcement parts in the front and rear directions.

[0021] Preferably, it further comprises a group of lifting tools, wherein the lifting tools are adapted to lift the drive chain when the drive chain is in a state of maximum forward tilt angle, or the lifting tools are adapted to lift the drive chain when the drive chain is in a state of maximum backward tilt angle.

[0022] In this solution, by adopting the above structure, the hoist can lift and assemble the drive chain as a whole when the drive chain is in a forward maximum tilt angle state or a backward maximum tilt angle state, so that after the assembly is completed, the test can be carried out without additional adjustment.

[0023] A drive chain inclination angle testing method, characterized in that it uses the drive chain inclination angle testing device as described above, and the method comprises the following steps:

[0024] S1. Install the drive chain and the tooling rotatably on the base;

[0025] S2. Conducting an inclination test of the maximum forward inclination angle of the drive chain;

[0026] S3, the drive chain rotates to the maximum tilt angle;

[0027] S4. Conduct an inclination test of the maximum forward inclination angle of the drive chain.

[0028] In this solution, the above method is adopted, and the base fixture of the drive chain inclination test equipment is rotatably connected to the drive chain, and the base fixture has a preset inclination angle. When the drive chain is installed on the base fixture, the inclination angle of the drive chain can be changed by rotation and rotated to the first test position with the maximum forward inclination angle relative to the horizontal direction and the second test position with the maximum backward inclination angle relative to the horizontal direction, respectively, so that a set of tooling and lifting equipment can complete the test of two inclination conditions, and the drive chain is only assembled once during the entire test process, reducing the number of times fasteners are reused. The two test conditions can be quickly switched, which greatly reduces the test cost, reduces the test process, and shortens the test period.

[0029] Preferably, in step S1, the yaw system and the front frame are first installed on the base fixture, and then the drive chain is hoisted and installed on the front frame.

[0030] In this solution, the above method is adopted. When the wind turbine drive chain is working normally, it is fixed on the front frame, and a yaw system is installed under the front frame. The yaw system is a system that can rotate the front frame and the drive chain. The yaw system is installed on the base tooling, and the inclination angle of the drive chain under test is changed by the rotation function of the yaw system itself. The yaw system and the front frame are installed first, and only the drive chain needs to be lifted during lifting, which reduces the difficulty and requirements of lifting.

[0031] Preferably, in step S1, the drive chain is directly hoisted onto the yaw system at an inclination degree of the maximum forward inclination angle.

[0032] In this solution, the above method is used to directly carry out the maximum forward tilt angle test after hoisting without additional adjustment. At the same time, the hoisting angle is relatively easy to control and achieve, which reduces the test process.

[0033] Preferably, the front frame includes an initial elevation angle, and the angle at which the drive chain is suspended is the difference between the preset inclination angle and the initial elevation angle.

[0034] In this solution, the above method is adopted. Since the drive chain of the wind turbine is designed with an elevation angle, that is, the initial elevation angle of the front frame. With the help of the initial elevation angle of the front frame and the rotation of the yaw system, the drive chain can be lifted and installed at a smaller elevation angle. The small-angle working condition is closer to the lifting of the drive chain during batch assembly, and the batch drive chain hoisting tools can be reused. There is no need to design and purchase new hoists, and only different lengths of slings need to be replaced. The drive chain can be lifted at a smaller inclination angle, which reduces the strength requirements for the drive chain lifting ears, and reduces the testing cost by borrowing batch hoists.

[0035] Preferably, the method further comprises step S5, after the yaw system drives the drive chain to rotate to the maximum forward tilt angle, the drive chain is lifted off the base fixture at the inclination degree of the maximum forward tilt angle.

[0036] In this solution, the above method is adopted to restore the driving chain to the inclined state during hoisting before unloading, which is convenient for disassembly using the same set of lifting equipment, further reducing costs.

[0037] Preferably, before step S1, the following steps are also included:

[0038] S0. According to the static load when the drive chain deviates to the maximum working condition and the pre-tightening force of the base tooling connected to the ground, the specifications and quantity of the chemical bolts are determined, and the base tooling is set on the ground by the chemical bolts.

[0039] In this solution, the above method is adopted to assemble using a pre-calculated assembly method, which can improve the assembly strength without the need to adjust the assembly method and fasteners after the test begins.

[0040] The positive and progressive effects of the present invention are as follows: the present invention discloses a drive chain inclination angle test device and a drive chain inclination angle test method. When the drive chain of a wind turbine generator set is working normally, it is fixed on the front frame, and a yaw system is installed under the front frame. The yaw system is a system that can rotate the front frame and the drive chain. The yaw system is installed on the base tooling, and the drive chain is rotated and reaches different test positions with the help of the rotation function of the yaw system itself, thereby realizing the inclination angle change of the drive chain during the test. A set of tooling slings can complete the test of two inclination angle conditions, and the drive chain is only assembled once during the entire test process, reducing the number of times fasteners are reused. In addition, the two test conditions can be switched quickly, which greatly reduces the test cost, reduces the test process, and shortens the test period. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the drive chain inclination angle test in the prior art.

[0042] Figure 2 This is a structural schematic diagram of the assembly status of the base tooling, yaw system and front frame in this embodiment of the invention.

[0043] Figure 3 It is a schematic structural diagram of the drive chain inclination angle testing device of the present embodiment of the invention when performing a forward maximum inclination angle test.

[0044] Figure 4 It is a schematic structural diagram of the drive chain inclination angle testing device of the present embodiment of the invention when performing a rearward maximum inclination angle test.

[0045] Figure 5It is a schematic diagram of the changes of the drive chain inclination angle testing device of this embodiment of the invention in different test states.

[0046] Figure 6 It is a schematic diagram of the structure of the hanger of this embodiment of the invention.

[0047] Figure 7 Schematic diagram of the process of the drive chain inclination angle testing method according to the present embodiment of the invention.

[0048] Description of reference numerals:

[0049] Base tooling 1

[0050] Tool body 11

[0051] Reinforcement 12

[0052] Yaw system 41

[0053] Front rack 42

[0054] Drive chain 2

[0055] Spreader 3

[0056] Forward maximum tilt angle state 10

[0057] Maximum tilt angle state 20

[0058] Intermediate state 3

[0059] Initial elevation angle a

[0060] Mounting surface angle b

[0061] Maximum forward tilt angle c

[0062] Maximum tilt angle d DETAILED DESCRIPTION

[0063] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0064] like Figure 1 As shown, in the prior art, the inclination test of the drive chain 2 needs to first complete the inclination test of the drive chain 2 at a first angle, then remove the tooling and install the second tooling to complete the inclination test of the drive chain 2 at a second angle. Generally, it includes the following process:

[0065] Complete the assembly of the drive chain 2 - install the tilt angle test fixture (4 days) - use the tilt angle hoist 3 to lift the drive chain 2 (1 day) - lift the drive chain 2 on the tilt angle fixture at the tilt angle and connect it (1 day) - connect the drive chain 2 and test it, and remove the wires after the test (2 days) - remove the fasteners connecting the drive and the tilt fixture, and use the tilt angle hoist 3 to lift out the drive chain 2 (1 day) - remove the fasteners connecting the drive and the tilt fixture, and use the tilt angle hoist 3 to lift out the drive chain 2 The tilting hoist 3 lifts out the drive chain 2 (1 day) - removes the forward tilting tooling and installs the backward tilting tooling (7 days) - uses the backward tilting hoist 3 to lift the drive chain 2 (1 day) - lifts the drive chain 2 in the backward tilting state onto the backward tilting tooling and connects it (1 day) - connects and tests the drive chain 2, and removes the wires after the test (2 days) - removes the fasteners connecting the drive and the tilting tooling, and uses the backward tilting hoist 3 to lift out the drive chain 2 (1 day).

[0066] It can be seen from the whole process that there are many repeated operations, which takes about 21 days. Since the inclination test of the floating unit drive chain 2 has two inclination conditions to be tested, according to the existing test hoisting process, two sets of tooling (test tooling for the forward inclination angle and the test tooling for the backward inclination angle) and two sets of hoists 3 (hoisting tool in the forward inclination state and hoisting tool in the backward inclination state) need to be designed and purchased, and a large amount of tooling and hoisting tool 3 costs need to be invested. The two assemblies of the drive chain 2 also generate inspection costs for the reuse of fasteners. In addition, since the dynamic test requires the drive chain 2 to be rigidly connected to the ground, the tooling at both angles needs to be fixed to the ground with the help of chemical bolts. Two test conditions require the preparation of two test sites to install the test tooling, which also increases the number of supporting cables between the sites. If the tooling is switched at the same site in order to reduce the footprint, it will take 6-7 days to switch the tooling because the installation of chemical bolts requires on-site drilling and waiting for the gel to harden, which prolongs the entire test cycle. When the drive chain 2 is lifted and adjusted to a larger inclination angle, the stress state of the drive chain 2 lifting ear will change. The lifting lugs suitable for small-angle lifting cannot withstand the forces in different directions when lifting at a large angle. Therefore, according to the existing test lifting process, the lifting lugs on the drive chain 2 need to be strengthened. Strengthening the lifting lugs requires changing the casting shape of the casting. Modifying the casting mold will not only incur a fee, but also affect the delivery of materials.

[0067] The forward tilt state of the drive chain is as follows Figure 3 As shown, at this time, the front end of the driving chain 2 is tilted downward.

[0068] The drive chain tilts backwards. Figure 4 As shown, at this time, the rear end of the driving chain 2 is tilted downward.

[0069] Specifically, in this embodiment, the front end of the drive chain 2 refers to the end of the drive chain 2 connected to the hub when the drive chain 2 is installed in the wind turbine generator set, and the rear end of the drive chain 2 refers to the end of the drive chain 2 away from the hub when the drive chain 2 is installed in the wind turbine generator set. In other embodiments, the front end of the drive chain 2 may also refer to the end of the drive chain 2 away from the hub after the drive chain 2 is installed in the wind turbine generator set, and the rear end of the drive chain 2 may also refer to the end of the drive chain 2 used to connect to the wind turbine hub.

[0070] like Figures 2 to 5 As shown, this embodiment provides a drive chain 2 inclination test device, which is used to perform an inclination test on the drive chain 2, and includes a base fixture 1 and a yaw system 41. The base fixture 1 has a mounting surface inclined in the horizontal direction, and the mounting surface is used to install the yaw system 41. The mounting surface has a preset inclination relative to the horizontal direction. Based on the degree of the preset inclination (i.e., the mounting surface angle b), after the drive chain 2 is assembled thereon, it can be rotated and turned to the first test position, at which time the drive chain 2 is in the forward maximum inclination state 10; and rotated to the second test position, at which time the drive chain 2 is in the backward maximum inclination state 20. The yaw system 41 is detachably fixed on the mounting surface, and the drive chain 2 is rotatably connected to the yaw system 41.

[0071] When the drive chain 2 is in the first test position, the front end of the corresponding drive chain 2 is lower than the rear end of the drive chain 2 . When the drive chain 2 is in the second test position, the front end of the corresponding drive chain 2 is higher than the rear end of the drive chain 2 .

[0072] In order to realize that one tool can meet the test of two drive chain inclination angles, an operation of switching the inclination angle of the drive chain 2 is required. When the wind turbine drive chain 2 is working normally, it is fixed on the front frame 42, and a yaw system 41 is installed under the front frame 42. The yaw system 41 is a system that can rotate the front frame 42 and the drive chain 2. The yaw system 41 is installed on the base tool 1, and the inclination angle of the drive chain 2 under test is changed by the rotation function of the yaw system 41 itself. A set of tooling slings 3 can complete the test of two inclination conditions, which greatly reduces the test cost, reduces the test process, and shortens the test period.

[0073] In other embodiments, other rotary drive mechanisms may be used instead of the yaw system of the wind turbine to drive the drive chain to rotate, but this solution is more expensive.

[0074] In this embodiment, the switching state is as follows: Figure 5 As shown, when the hoisting is completed, it is in the forward maximum tilt state 10. Figure 3As shown, the drive chain 2 is tilted forward at a maximum angle c to the ground, and the drive chain 2 can be driven by the yaw system 41 to rotate and rotate to the intermediate state 30 in sequence and finally switch to the backward tilt state 20 at the maximum angle. Figure 4 As shown, the driving chain 2 is tilted backward with the ground at a maximum tilt angle d.

[0075] In this embodiment, the yaw system 41 is electrically connected to the base fixture 1. The yaw system 41 is directly electrically connected to the base fixture 1, and no additional wiring is required for the yaw system 41, which facilitates its rotation.

[0076] like Figure 6 As shown, in the embodiment, the drive chain inclination angle test device further includes a set of slings 3, which are adapted to sling the drive chain 2 when the drive chain 2 is in a state of maximum forward inclination angle, or the slings 3 are adapted to sling the drive chain when the drive chain 2 is in a state of maximum backward inclination angle. Specifically, when slinging the drive chain 2, the slings 3 and the drive chain 2 are connected by a sling, and the slings 3 are connected to the lifting equipment by means of slings and other components. Before slinging, the yaw system 41 can drive the drive chain 2 to rotate from other states to a state adapted to the slings 3, and then slinging is performed, so that only one set of slings 3 is required.

[0077] like Figures 2 to 5 As shown, the drive chain 2 is rotatably connected to the yaw system 41 via the front frame 42. The mounting surface, the yaw system 41, the front frame 42 and the drive chain 2 are connected in sequence from bottom to top. The front frame 42 and the yaw system 41 itself are part of the unit, which will continue to be used as part of the product after the test is completed, reducing the waste of structural parts during the inclination test. The yaw system 41 is a device that can change the orientation of the upper front frame 42 and the drive chain 2 by self-rotation. By controlling the yaw system 41 to rotate 180 degrees, the inclination angle of the drive chain 2 can be switched from forward inclination to backward inclination. The front frame 42 includes an initial elevation angle. In this embodiment, Figure 2 , 3 As shown, the difference between the preset inclination angle b and the initial elevation angle a is the same as the angle of the maximum forward inclination angle c. The angle at which the drive chain 2 is lifted is the difference between the preset inclination angle and the initial elevation angle. Since the drive chain 2 of the wind turbine generator set is designed with an elevation angle (i.e., the initial elevation angle a), i.e., the initial elevation angle of the front frame 42. With the help of the initial elevation angle of the front frame 42 and the rotation of the yaw system 41, the drive chain 2 can be lifted and installed at a smaller elevation angle. The small-angle working condition is closer to the lifting of the drive chain 2 during batch assembly, and the batch of hoists 3 can be reused. There is no need to design and purchase new hoists 3, and only different lengths of slings need to be replaced. The drive chain 2 can be lifted at a smaller inclination angle, which reduces the strength requirements for the lifting ears of the drive chain 2, and the test cost is reduced by borrowing batch hoists 3.

[0078] In other embodiments, the yaw system 41 and the drive chain 2 may not be connected via the front frame 42. In this case, since the front frame 42 is not provided, the preset inclination angle of the mounting surface may be set to be the same as the maximum forward inclination angle or the maximum backward inclination angle. During hoisting, the hoist can be directly hoisted at the maximum forward inclination angle or the maximum backward inclination angle. After the hoisting is completed, one of the angles can be directly tested, thereby shortening the test process.

[0079] like Figure 2 As shown, the base fixture 1 includes a fixture body 11 and a reinforcement part 12. The fixture body 11 is a cylindrical structure. The reinforcement part 12 is respectively arranged on both sides of the cylindrical structure along the inclination direction of the mounting surface, that is, at both ends of the fixture body 11. The function of the base fixture 1 is to ensure that the yaw system 41 and the ground are relatively stationary during the entire test process. The tower structure of the reference unit is usually a cylindrical barrel structure, so the fixture body 11 adopts a cylindrical or barrel-shaped cylindrical structure as the main support. However, the upper and lower connecting flange surfaces of the normal tower are horizontal structures, while the upper and lower connecting flange surfaces of the inclination test fixture are not horizontal. In order to ensure that the fixture still has sufficient strength under the two extreme working conditions of the forward and backward inclination of the drive chain 2, it is necessary to appropriately increase the reinforcement part 12 in the front and rear directions. In this embodiment, the reinforcement part 12 can be a reinforcing rib. Specifically, the reinforcing rib is arranged on the side wall of the cylindrical structure, and is arranged along the direction from the mounting surface to the ground. In order to improve the overall structural strength, the two ends of the reinforcing rib are respectively fixedly connected to the lower surface of the mounting surface and the ground.

[0080] like Figure 7 As shown, this embodiment provides a drive chain inclination angle test method, which uses the drive chain inclination angle test device as above, and the method includes the following steps:

[0081] S1, installing the drive chain 2 and the yaw system 41 on the base tooling 1;

[0082] S2, performing an inclination test of the maximum forward inclination angle of the drive chain 2;

[0083] S3, the yaw system 41 drives the drive chain 2 to rotate to the maximum backward tilt angle;

[0084] S4, performing an inclination test of the maximum forward inclination angle of the drive chain 2.

[0085] When the wind turbine drive chain 2 is working normally, it is fixed on the front frame 42, and a yaw system 41 is installed under the front frame 42. The yaw system 41 is a system that can rotate the front frame 42 and the drive chain 2. The yaw system 41 is installed on the base fixture 1, and the inclination angle of the drive chain 2 under test is changed by the rotation function of the yaw system 41 itself. This allows a set of fixture slings 3 to complete the test of two inclination conditions. The drive chain 2 is only assembled once during the entire test process, reducing the number of times fasteners are reused. The two test conditions can be quickly switched, which greatly reduces the test cost, reduces the test process, and shortens the test period.

[0086] In step S1 , the yaw system 41 and the front frame 42 are first installed on the base fixture 1 , and then the drive chain 2 is hoisted and installed on the front frame 42 .

[0087] The yaw system 41 and the front frame 42 are installed first, and only the drive chain 2 needs to be moved during lifting, which reduces the difficulty and requirements of lifting.

[0088] In step S1 , the drive chain 2 is directly hoisted onto the base fixture 1 at the inclination degree of the maximum forward inclination angle.

[0089] The maximum forward tilt angle test can be carried out directly after hoisting without additional adjustment. At the same time, the hoisting angle is relatively easy to control and achieve, which reduces the test process.

[0090] In addition, the front frame 42 includes an initial elevation angle, and the angle at which the drive chain 2 is hoisted is the difference between the preset inclination angle and the initial elevation angle. Since the drive chain 2 of the wind turbine is designed with an elevation angle (i.e., the initial elevation angle a), that is, the initial elevation angle of the front frame 42. With the help of the initial elevation angle of the front frame 42 and the rotation of the yaw system 41, the drive chain 2 can be hoisted and installed at a smaller elevation angle. The small-angle working condition is closer to the hoisting of the drive chain 2 during batch assembly, and the batch hoist 3 can be reused. There is no need to design and purchase a new hoist 3, and only different lengths of slings need to be replaced. The drive chain 2 can be hoisted at a smaller inclination angle, which reduces the strength requirements for the lifting ears of the drive chain 2, and the test cost is reduced by borrowing batch hoists 3.

[0091] It should be noted that since the front frame already includes the initial tilt angle, when testing, after the drive chain is rotated 180 degrees from the maximum forward tilt angle, its angle may be different from the maximum backward tilt angle. At this time, it is only necessary to adjust the rotation angle of the yaw mechanism for fine-tuning so that the angle between the drive chain and the ground is the maximum backward tilt angle for testing.

[0092] The method further comprises step S5, after the yaw system 41 drives the drive chain 2 to rotate to the maximum forward tilt angle, the drive chain 2 is lifted off the base fixture 1 at the inclination degree of the maximum forward tilt angle.

[0093] Before unloading, the driving chain 2 is restored to the inclined state during hoisting, so as to facilitate disassembly using the same set of hoisting equipment 3, thereby further reducing costs.

[0094] In addition, before step S1, the following steps are also included:

[0095] S0. According to the static load when the drive chain 2 deviates to the maximum working condition and the preload force of the base fixture 1 connected to the ground, determine the specifications and quantity of the chemical bolts, and set the base fixture 1 on the ground through the chemical bolts. The maximum working condition is the static load when the drive chain 2 rotates 90° during the test, ensuring that the drive chain will not tip over during the angle switching process. In addition, since the drive chain 2 has a certain length, this fixture also needs to ensure that the drive chain 2 is at the lowest point in the tilted state and maintains a safe distance from the ground. In addition, the preload force of the fixture connected to the ground needs to be known during finite element analysis to confirm the specifications and quantity of the chemical bolts.

[0096] Using pre-calculated assembly methods for assembly can improve assembly strength, eliminating the need to adjust assembly methods and fasteners after the test begins.

[0097] Specifically, during the operation of the drive chain inclination test hoisting process, each component needs to be hoisted according to the following process. (The initial inclination angle a of the front frame 42 requires the test unit to be tested at the maximum forward inclination angle c and the maximum backward inclination angle d.)

[0098] 1. Install the base tooling 1 with a preset inclination angle to the ground by using chemical bolts.

[0099] 2. After pre-assembling the front frame 42 and the yaw system 41, hoist them and install them on the installation surface of the base fixture 1, and tighten the connecting bolts.

[0100] 3. The drive chain 2 is hoisted at an angle equal to the difference between the preset inclination angle and the initial elevation angle a and then installed on the front frame 42 .

[0101] 4. Connect the cables and pipelines for no-load test, and start the no-load test of drive chain 2 when the unit tilts forward to the maximum inclination angle c.

[0102] 5. Connect the yaw motor cable, rotate the drive chain 2 and the front frame 42, and make the drive chain 2 reach the state of the maximum backward tilt angle d.

[0103] 6. Start the no-load test of drive chain 2 when the unit tilts backward to the maximum inclination angle d.

[0104] 7. Turn on the yaw motor to rotate the drive chain 2 and the front frame 42, so that the drive chain 2 returns to the state of the maximum forward tilt angle c.

[0105] 8. Loosen the connecting bolts between the drive chain 2 and the front frame 42, and hang the drive chain 2 from the front frame 42 to the placement tool.

[0106] 9. Lift the front frame 42 off the base fixture 1, lift it back onto the turning fixture of the front frame 42 and lay it flat.

[0107] Based on the test method of this embodiment, the entire test process is as follows:

[0108] Complete the assembly of drive chain 2 - install the inclination test tooling (4 days) - use the forward inclination angle hoist 3 to lift the drive chain 2 (1 day) - hoist the drive chain 2 in the forward inclination state onto the forward inclination tooling and connect it (1 day) - connect the drive chain 2 and test it, and remove the wires after the test (2 days) - connect the yaw wires, turn the yaw to make the drive chain 2 turn to the backward inclination angle (1 day) - connect the drive chain 2 and test it, and remove the wires after the test (2 days) - connect the yaw wires, turn the yaw to make the drive chain 2 turn to the forward inclination angle (1 day) - remove the fasteners connecting the drive and inclination tooling, and use the forward inclination angle hoist 3 to lift out the drive chain 2 (1 day).

[0109] In summary, it can be seen that the entire process has been greatly shortened, the testing cycle only takes 13 days, and the cost is greatly reduced.

[0110] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A drive chain inclination test device, which is used to test the inclination of a drive chain, characterized in that: It includes: A base tooling, wherein the base tooling has a mounting surface, the drive chain is rotatably mounted on the base tooling, and the drive chain can rotate within the plane where the mounting surface is located; The mounting surface has a preset inclination angle relative to the horizontal direction, and the drive chain can rotate within the plane where the mounting surface is located to a first test position with a maximum forward inclination angle relative to the horizontal direction and a second test position with a maximum backward inclination angle relative to the horizontal direction; When the drive chain is in the first test position, the front end of the drive chain is lower than the rear end of the drive chain. When the drive chain is in the second test position, the front end of the drive chain is higher than the rear end of the drive chain.

2. The drive chain inclination angle testing device according to claim 1, characterized in that: The angle of the maximum forward tilt angle or the maximum backward tilt angle is the same as the preset tilt angle.

3. The drive chain inclination angle testing device according to claim 1, characterized in that: A yaw system is installed on the mounting surface, the drive chain is installed on the base tooling through the yaw system, a front frame is further provided between the drive chain and the yaw system, the drive chain is rotatably connected to the yaw system through the front frame, and the mounting surface, the yaw system, the front frame and the drive chain are connected in sequence from bottom to top; Preferably, the front frame has an initial elevation angle, and the angle of the maximum backward tilt angle is the sum of the angle of the preset tilt angle and the initial elevation angle; The angle of the maximum forward tilt angle is the difference between the preset tilt angle and the initial elevation angle.

4. The drive chain inclination angle testing device according to claim 3, characterized in that: The yaw system is electrically connected to the base tooling.

5. The drive chain inclination angle testing device according to claim 1, characterized in that: The base tooling comprises a tooling body and a reinforcement part, the tooling body is a cylindrical structure, and the reinforcement part is respectively arranged on both sides of the cylindrical structure along the inclined direction of the mounting surface.

6. The drive chain inclination angle testing device according to claim 1, characterized in that: It also includes a set of lifting tools, which are adapted to lift the drive chain when the drive chain is in a state of tilting forward with a maximum inclination angle, or the lifting tools are adapted to lift the drive chain when the drive chain is in a state of tilting backward with a maximum inclination angle.

7. A drive chain inclination angle testing method, characterized in that: The method uses the drive chain inclination angle testing device according to any one of claims 1 to 6, and comprises the following steps: S1. Install the drive chain and the tooling rotatably on the base; S2. Conducting an inclination test of the maximum forward inclination angle of the drive chain; S3, the drive chain rotates to the maximum tilt angle; S4. Conduct an inclination test of the maximum forward inclination angle of the drive chain.

8. The drive chain inclination angle testing method according to claim 7, characterized in that: In step S1, the yaw system is first installed on the base fixture, and then the drive chain is hoisted at a preset inclination angle and installed on the yaw system.

9. The drive chain inclination angle testing method according to claim 7, characterized in that: In step S1, the yaw system and the front frame are first installed on the base fixture, and then the drive chain is hoisted at a difference between the preset inclination angle and the initial elevation angle and then installed on the front frame.

10. The drive chain inclination angle testing method according to claim 7, characterized in that: The method also includes step S5, after the drive chain rotates to the maximum forward tilt angle, lifting the drive chain away from the base tooling at the inclination degree of the maximum forward tilt angle.

11. The drive chain inclination angle testing method according to claim 7, characterized in that: Before step S1, the following steps are also included: S0. According to the static load when the drive chain deviates to the maximum working condition and the pre-tightening force of the base tooling connected to the ground, the specifications and quantity of the chemical bolts are determined, and the base tooling is set on the ground by the chemical bolts.

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