Assistive bearing housing structure and method for testing gearbox in a wind turbine transmission chain

Abstract

An assistive bearing housing structure and method for testing a gearbox in a wind turbine transmission chain. The assistive bearing housing structure comprises: a bearing housing, which comprises an upper bearing housing half and a lower bearing housing half that can be detachably connected, wherein a flange structure connected to a gearbox under test is arranged at an end part of the bearing housing; a bearing, which is mounted at a set position of the inner ring of the bearing housing; a spline sleeve, which is mounted on the inner ring of the bearing, wherein two ends of the spline sleeve can be connected to spline shafts of the gearbox under test; and a bearing pressing plate, which is sleeved on the spline sleeve and used for fixing the inner ring of the bearing. The present invention solves the problems in the prior art of long production cycles, complicated assembly processes, and high test costs caused by factory tests of integrated transmission chain gearboxes needing to occupy a wind turbine bearing housing for assembly.

Description

Auxiliary bearing seat structure and method for testing a wind turbine transmission chain gearbox

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] The present invention claims priority to Chinese patent application No. 202410053354.6 filed with the State Intellectual Property Office of China on January 12, 2024, entitled “A structure and method for auxiliary bearing seat for testing transmission chain gearbox of wind turbine generator set”, the entire contents of which are incorporated by reference into the present invention and constitute a part of the present invention for all purposes. Technical Field

[0003] The present invention relates to the field of wind power generation equipment, and in particular to an auxiliary bearing seat structure and method for testing a transmission chain gearbox of a wind turbine set. Background Art

[0004] In the past, the bearing seat assembly components and gearbox of wind turbines were separated and connected by a locking plate or flange. The first-level planetary sleeve of the gearbox had an independent support bearing, and the gearbox only needed to add an auxiliary torque transmission shaft for testing.

[0005] With the increase in wind turbine power levels and changes in wind turbine drive train structures, the mainstream drive train design now integrates the bearing seat assembly and gearbox. However, since the first-stage planetary carrier of the gearbox lacks bearing support and a front housing, the first-stage planetary carrier requires support from the main shaft of the bearing seat assembly. Therefore, gearbox manufacturers must use the bearing seat assembly to conduct gearbox testing.

[0006] Since the bearing seat assembly parts and gearbox are produced by the complete machine manufacturer and the gearbox manufacturer respectively, if the gearbox manufacturer conducts the test, it needs to borrow the bearing seat assembly parts of the complete machine manufacturer. This brings about additional transportation and disassembly requirements for the bearing seat assembly parts, resulting in waste of cost and time. In addition, during the test process, there is a risk of damage or accumulation of fatigue damage to the main shaft bearing in the original bearing seat assembly of the wind turbine.

[0007] Summary of the Invention

[0008] The purpose of the present invention is to provide an auxiliary bearing seat structure and method for testing a wind turbine transmission chain gearbox. By designing an auxiliary bearing seat structure to replace the original unit bearing seat structure required during the test process, the present invention solves the problem that the existing integrated transmission chain gearbox factory test requires the unit bearing seat assembly, resulting in a long production cycle, a cumbersome assembly process, and high testing costs. To achieve the above purpose, the present invention solves the problem through the following technical solutions:

[0009] In a first aspect, the present invention provides an auxiliary bearing seat structure for testing a transmission chain gearbox of a wind turbine generator set, comprising:

[0010] The bearing seat is divided into an upper bearing seat and a lower bearing seat, and can be detachably connected. The end of the bearing seat is provided with a flange structure connected to the test gear box;

[0011] A bearing, mounted at a set position on the inner ring of the bearing seat;

[0012] A spline sleeve is installed on the inner ring of the bearing, and both ends of the spline sleeve can be connected to the spline shaft of the test gearbox;

[0013] The bearing pressure plate is sleeved on the spline sleeve and is used to fix the bearing inner ring.

[0014] In a second aspect, the present invention provides a method for testing a wind turbine transmission chain gearbox, which is performed using the auxiliary bearing seat structure for testing a wind turbine transmission chain gearbox as described in the first aspect, and includes the following steps:

[0015] Assemble the bearing, spline sleeve, lower half bearing seat and bearing pressure plate in sequence and hoist them onto the test bench; assemble the spline shaft and the first-stage planetary carrier of the gearbox; hoist the gearbox onto the test bench, assemble the spline shaft and spline sleeve, and secure the mounting bolts between the lower half bearing seat and the first-stage gear ring of the gearbox; after hoisting the upper half bearing seat, the test can be carried out.

[0016] As a further technical solution, the test gearbox needs to be aligned with the auxiliary bearing seat structure for testing the wind turbine transmission chain gearbox as described in the first aspect.

[0017] As a further technical solution, when the test gearbox is aligned with the auxiliary bearing seat structure, the position of the first-stage planetary carrier is temporarily fixed with the help of the planetary carrier auxiliary mounting components.

[0018] As a further technical solution, the planetary carrier auxiliary mounting component is installed between the spline shaft and the first stage ring gear of the gearbox.

[0019] As a further technical solution, the planetary carrier auxiliary installation components are removed after the lower half of the bearing seat is fixed to the first-stage ring gear of the gearbox.

[0020] As a further technical solution, the planet carrier auxiliary mounting component is in the form of a fan-ring structure as a whole.

[0021] As a further technical solution, the bearing seat and the first-stage gear ring of the gearbox are fixed through a flange structure.

[0022] As a further technical solution, two test gearboxes are provided, which are respectively arranged at the two ends of the auxiliary bearing seat structure for testing the wind turbine transmission chain gearbox as described in the first aspect.

[0023] As a further technical solution, one of the test gearboxes is equipped with a test motor, and the other test gearbox is equipped with a test generator.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention designs an auxiliary bearing seat structure to replace the unit bearing seat structure required in the original test process, thereby solving the problem that the existing integrated transmission chain gearbox factory test requires the unit bearing seat assembly, resulting in a long production cycle, a cumbersome assembly process, and high testing costs. It not only reduces the transportation time and cost of the bearing seat assembly from the whole machine factory to the gearbox factory, but also avoids the risk of damage or fatigue damage accumulation caused by the original bearing seat assembly of the fan during the gearbox test.

[0026] 2. After the gearbox of the present invention is assembled, when conducting a test, the spline shaft and the first-stage planetary carrier are first connected with bolts and pins, and then the planetary carrier auxiliary mounting component is installed between the spline shaft and the first-stage ring gear of the gearbox to fix the position of the first-stage planetary carrier, so as to facilitate the assembly of the spline matching when the gearbox and the bearing seat are assembled and aligned.

[0027] 3. The auxiliary bearing seat structure for testing wind turbine transmission chain gearboxes in this invention can be connected to both the main test gearbox and the companion test gearbox at both ends, with splines transmitting torque between the two gearboxes. While the original test method for the bearing seat structure requires two lubrication systems for both transmission chains, this structure allows a single lubrication system to lubricate both test gearboxes during testing, saving equipment, lubricating oil, and refueling time.

[0028] 4. The auxiliary bearing seat structure of the present invention has a short overall size, which can effectively reduce the length of the test bench and the test transmission chain, thereby reducing the floor space occupied by the test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which form part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their description are provided to illustrate the present invention and are not intended to limit the present invention. It should also be understood that these drawings are shown for simplicity and clarity and are not necessarily drawn to scale. The present invention will now be described and explained with additional specificity and detail through the use of the accompanying drawings, in which:

[0030] FIG1 shows a schematic diagram of the installation of a test bench according to an embodiment of the present invention;

[0031] FIG2 shows a schematic structural diagram of an auxiliary bearing seat according to an embodiment of the present invention;

[0032] FIG3 shows a schematic structural diagram of an auxiliary bearing seat according to an embodiment of the present invention;

[0033] FIG4 shows a schematic diagram of the assembly structure of a test gearbox according to an embodiment of the present invention;

[0034] FIG5 shows a schematic diagram of gearbox centering in an embodiment of the present invention.

[0035] In the figure: 1. Auxiliary bearing seat structure; 11. Bearing; 12. Spline sleeve; 13. Bearing pressure plate; 14. Bearing seat; 15. Mounting seat; 2. Fasteners; 3. Main test gearbox; 31. Remaining gearbox sleeve; 32. First-stage ring gear; 33. First-stage planetary carrier; 34. Spline shaft; 4. Test generator; 5. Accompanying test gearbox; 6. Test motor; 7. Connection to the test bench; 8. Auxiliary mounting parts of the planetary carrier. DETAILED DESCRIPTION

[0036] The technical solutions in typical embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] Example 1

[0038] The present application is directed to a wind turbine bearing seat assembly and gearbox integrated wind turbine transmission chain structure. The first-level planetary sleeve has no bearing support, so the current test must borrow the bearing seat of the wind turbine, resulting in transportation costs for the bearing seat and the risk of bearing damage and damage during the transportation test. In order to overcome the problems in the prior art, the present embodiment provides an auxiliary bearing seat structure 1 for testing a wind turbine transmission chain gearbox, as shown in Figures 2 and 3, including a bearing seat 14, a bearing 11, a spline sleeve 12, and a bearing pressure plate 13. The overall structure is simple, connected by splines and bolts, and is easy to install. The auxiliary bearing seat structure test bench is easy to install, reducing the connection tooling between the two main shafts when borrowing the bearing seat structure. In addition, the overall size of the auxiliary bearing seat structure 1 is short, which reduces the length of the test bench, thereby reducing the floor space occupied by the test bench.

[0039] The bearing seat 14 is divided into an upper half and a lower half, which are detachably connected. The end of the bearing seat 14 is provided with a flange structure for connecting to the test gearbox. Both the upper and lower bearing seats are provided with a mounting seat 15 and are connected together by fasteners 2, such as bolts.

[0040] The bearing 11 is installed at a set position of the inner ring of the bearing seat 14. In this embodiment, two identical bearings 11 are provided. The specific form of the bearing 11 is not limited to a tapered roller bearing.

[0041] The spline sleeve 12 is installed on the inner ring of the bearing and supported by the bearing 11. The inner ring of the spline sleeve 12 is provided with splines. The spline sleeve 12 is connected to the spline shaft 34 of the main test gearbox 3 and the accompanying test gearbox 5 for torque transmission.

[0042] The bearing pressure plate 13 is sleeved on the spline sleeve 12 and is used to fix the inner ring of the bearing.

[0043] In this embodiment, the auxiliary bearing seat structure 1 for testing wind turbine transmission chain gearboxes can be connected at both ends to a main test gearbox 3 and a companion test gearbox 5. Torque is transmitted between the two gearboxes via splines. Both the main test gearbox 3 and the companion test gearbox 5 include a gearbox housing 31, a primary ring gear 32, a primary planetary carrier 33, and a spline shaft 34. While the original test method for the bearing seat structure requires two lubrication systems for lubricating both transmission chains, this structure allows a single lubrication system to lubricate both test gearboxes during testing, saving equipment, lubricating oil, and refueling time.

[0044] The assembly sequence of the auxiliary bearing seat structure 1 is to install the bearing 11 and the spline sleeve 12 in sequence to the positioning position of the lower half bearing seat 14, and fix the bearing inner ring with the bearing pressure plate 13.

[0045] Example 2

[0046] The present invention provides a method for testing a transmission chain gearbox of a wind turbine generator set, which is performed using the auxiliary bearing seat structure 1 for testing a transmission chain gearbox of a wind turbine generator set described in Example 1, and includes the following steps:

[0047] (1) Install the bearing 11 and spline sleeve 12 in the positioning position of the lower half bearing seat 14 in sequence, fix the inner ring of the bearing with the bearing pressure plate 13, then hoist the test bearing seat 14 assembly parts onto the test bench, and fix the mounting seat 15 with the mounting bolts, which is achieved by connecting the test bench 7.

[0048] (2) The test gearbox needs to be aligned with the auxiliary bearing seat structure 1. When aligning the test gearbox with the auxiliary bearing seat structure 1, the planetary carrier position must be temporarily fixed with the planetary carrier auxiliary mounting component 8. As shown in Figure 4, the spline shaft 34 is fixed to the gearbox primary planetary carrier 33 using mounting bolts and pins. The planetary carrier auxiliary mounting component 8 is then bolted to the gearbox primary ring gear 32 to support the gearbox primary planetary carrier 33 and facilitate spline matching installation when aligning the test gearbox. In this embodiment, the planetary carrier auxiliary mounting component 8 is an overall fan-shaped ring structure.

[0049] (3) Use mounting bolts to connect and fix the gearbox primary ring gear 32 and the bearing seat 14 housing. The bearing seat 14 and the gearbox primary ring gear 32 are fixed through a flange structure.

[0050] (4) Remove the planetary carrier auxiliary mounting component 8, install the upper half bearing seat 14, and install the mounting bolts between the upper half bearing seat 14 and the gearbox first-stage ring gear 32, and install the fasteners between the bearing seat mounting seat 15 and the test bench. The completion diagram is shown in Figures 1 and 5, and then the test can be carried out.

[0051] In this embodiment, two test gearboxes are provided, one at each end of the auxiliary bearing support structure 1 for testing the wind turbine transmission chain gearbox. As shown in Figure 1, these are a main test gearbox 3 and a companion test gearbox 5. The main test gearbox 3 is equipped with a test generator 4, while the companion test gearbox 5 is equipped with a test motor 6.

[0052] This embodiment designs an auxiliary bearing seat structure 1 to replace the unit bearing seat 14 structure required in the original test process, thereby solving the problem that the existing integrated transmission chain gearbox factory test requires the unit bearing seat 14 to be assembled, resulting in a long production cycle, a cumbersome assembly process, and high testing costs. It not only reduces the transportation time and cost of transporting the bearing seat 14 assembly from the entire machine factory to the gearbox factory, but also avoids the risk of damage or fatigue damage accumulation caused by the original bearing seat assembly of the fan during the gearbox test.

[0053] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

Claims

1. An auxiliary bearing seat structure for a wind turbine drive chain gearbox test, characterized in that, Comprising: A bearing housing, which is divided into an upper half bearing housing and a lower half bearing housing and can be detachably connected, and a flange structure for connecting with a test gearbox is provided at the end of the bearing housing; A bearing, installed at a set position on the inner ring of the bearing housing; A spline sleeve, installed on the inner ring of the bearing, and both ends of the spline sleeve can be connected to the spline shafts of the test gearbox; A bearing pressing plate, sleeved on the spline sleeve, for fixing the inner ring of the bearing.

2. A test method for the gearbox of a wind turbine drive train, characterized in that, The structure of the auxiliary bearing housing for the test of the wind turbine drive train gearbox as described in claim 1 is adopted, including the following steps: Assemble the bearing, the spline sleeve, the lower half bearing housing and the bearing pressing plate in sequence and hoist them onto the test bench; Assemble the spline shaft and the first-stage planet carrier of the gearbox; Hoist the gearbox onto the test bench, assemble the spline shaft and the spline sleeve, and fix the installation bolts between the lower half bearing housing and the first-stage gear ring of the gearbox; After hoisting the upper half bearing housing, the test can be carried out.

3. The test method for the gearbox of a wind turbine drive train according to claim 2, characterized in that, The test gearbox needs to be centered with the structure of the auxiliary bearing housing for the test of the wind turbine drive train gearbox as described in claim 1.

4. The test method for the gearbox of a wind turbine drive train according to claim 3, characterized in that When the test gearbox is centered with the auxiliary bearing housing structure, the position of the first-stage planet carrier is temporarily fixed by means of the planet carrier auxiliary installation component.

5. The test method for the gearbox of the drive train of a wind turbine according to claim 4, wherein, The planet carrier auxiliary installation component is installed between the spline shaft and the first-stage gear ring of the gearbox.

6. The test method for a gearbox of a wind turbine drive train according to claim 5, characterized in that After the lower half bearing housing is fixed to the first-stage gear ring of the gearbox, the planet carrier auxiliary installation component is removed.

7. A test method for a gearbox of a wind turbine drive train according to claim 6, characterized in that The planet carrier auxiliary installation component is integrally in a fan-shaped ring structure.

8. The test method for the gearbox of the drive train of a wind turbine according to claim 2, wherein The bearing housing is fixed to the first-stage gear ring of the gearbox through the flange structure.

9. The test method for the gearbox of a wind turbine drive train according to claim 2, wherein There are two test gearboxes, which are respectively arranged at both ends of the structure of the auxiliary bearing housing for the test of the wind turbine drive train gearbox as described in claim 1.

10. A test method for a gearbox of a wind turbine drive train as described in claim 9, characterized in that One of the test gearboxes is configured with a test motor, and the other test gearbox is configured with a test generator.

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