Wind turbine yaw and pitch bearing seal ring test system and test method

Abstract

The present invention relates to a wind turbine yaw and pitch bearing seal ring test system and test method, which belongs to the field of bearing seal detection, including a test bearing, a rotating table, an adjustment tool, an automatic oil filling pump and an oil collecting bottle; the test bearing includes a bearing outer ring, a bearing inner ring and a seal ring; the bearing inner ring is coaxially arranged with the bearing outer ring, the bearing inner ring is detachably connected to the rotating table, the bearing outer ring is detachably connected to the adjustment tool, the rotating table can rotate automatically, and the bearing outer ring and the bearing inner ring form a differential rotation. A wind turbine yaw and pitch bearing seal ring test system and test method of the present invention can simulate the operating condition of the bearing on the wind turbine and restore the relative displacement of the bearing seal ring when it is subjected to an overturning moment on the wind turbine through the relative operation of the bearing outer ring and the bearing inner ring. The test method is easy to operate and makes the test result more reliable.

Description

Technical Field

[0001] The present invention relates to a bearing seal ring testing system and a testing method, and in particular to a wind turbine generator set yaw and pitch bearing seal ring testing system and a testing method, which belongs to the field of bearing seal detection. Background Art

[0002] At present, the function of the sealing ring of the yaw and pitch bearing of the wind turbine generator set is mainly to prevent the dust from entering the bearing and to prevent the grease from leaking. Due to the factors such as the filling of grease into the bearing cavity, the operation of the bearing and the overturning moment during the actual use of the bearing, a certain pressure will be generated in the bearing cavity, which will have a certain impact on the sealing performance of the sealing system. Therefore, before the yaw and pitch bearings are used, the bearing sealing system needs to be tested for pressure resistance. In the prior art, the commonly used method is to use the installation pressure test method, and the yaw and pitch bearings are installed in the rotating device where the bearings are needed for testing. However, this test method requires the bearings to be disassembled and replaced, which is inconvenient to operate and inefficient. In addition, there is also a method of continuously filling compressed air or grease into the bearing to test the pressure value when the sealing ring fails. This test method can only test the ultimate pressure resistance value that the sealing ring can withstand, and cannot fully reflect the sealing performance of the sealing system of the bearing under fatigue conditions during the life cycle. The test method is relatively rough and cannot meet the actual use requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a wind turbine generator set yaw and pitch bearing seal ring testing system and testing method.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] A wind turbine yaw and pitch bearing seal ring test system comprises a test bearing, a rotating table, an adjusting tool, an automatic oil filling pump and an oil collecting bottle; the test bearing comprises a bearing outer ring, a bearing inner ring and a seal ring; the bearing inner ring is coaxially arranged with the bearing outer ring, and the seal ring is arranged between the bearing inner ring and the bearing outer ring; the seal ring comprises an upper end face seal ring and a lower end face seal ring, and they are respectively located on the upper and lower end faces between the bearing inner ring and the bearing outer ring, the seal ring, the bearing outer ring and the bearing inner ring form a sealed cavity, the test bearing is arranged above the rotating table, and the bearing outer ring or the bearing inner ring is detachably connected to the rotating table, the adjusting tool is arranged above the test bearing, and the bearing outer ring or the bearing inner ring is detachably connected to the adjusting tool, the rotating table can rotate automatically, the bearing outer ring and the bearing inner ring form differential rotation, the automatic oil filling pump is connected to the inner cavity of the test bearing through an oil pipe, and the oil collecting bottle is evenly distributed along the circumference of the test bearing.

[0006] Furthermore, the inner ring of the bearing is detachably connected to the rotating table, and the outer ring of the bearing is detachably connected to the adjusting tool.

[0007] Furthermore, the adjustment tooling includes a fixed beam, an adjustment device and a column, the adjustment device and the column are respectively located at the two ends of the fixed beam, and the column is connected to the fixed tooling; the adjustment device includes a first handle, a second handle and a third handle, and vertical plates are provided at both ends of the fixed beam, the first handle is screwed to the vertical plate and is pressed into a first surface of the fixed tooling, the second handle is screwed to the second surface of the fixed tooling and is pressed into a fixed beam, the third handle is screwed to the third surface of the fixed tooling and is pressed into a fixed beam; the first surface, the second surface and the third surface of the fixed tooling are perpendicular to each other.

[0008] Furthermore, the test bearing is provided with a plurality of oil filling holes and a plurality of oil draining holes, and the automatic oil filling pump can inject grease into the interior of the test bearing from the plurality of oil filling holes, and the oil draining holes are communicated with the oil collecting bottle.

[0009] Furthermore, the automatic oil filling pump can set the oil filling time, oil filling frequency and oil filling amount.

[0010] A testing method based on a wind turbine yaw and pitch bearing seal ring testing system comprises the following steps:

[0011] Step 1: detachably connect the inner ring of the bearing to the top of the rotating platform, and the rotating platform can drive the inner ring of the bearing to rotate;

[0012] Step 2: The fixed crossbeam is detachably connected to the upper part of the outer ring of the bearing, and the outer ring of the bearing rotates relative to the inner ring of the bearing above the rotating platform;

[0013] Step 3: The first handle and the second handle cooperate with the fixed crossbeam to adjust the axial and radial clearances of the test bearing, and fix the test bearing and the fixed crossbeam by operating the third handle;

[0014] Step 4: Start the rotating table and the automatic oil injection pump, adjust the rotating table speed and direction, and the automatic oil injection pump oil injection time, oil injection frequency and oil injection amount;

[0015] Step 5: Install the oil collecting bottle on the outside of the test bearing, observe whether the upper and lower end seals of the test bearing seal fall off and leak a lot of oil during the test, and observe the grease collected by the oil collecting bottle. When the amount of oil injected is the same as the amount of grease collected by the oil collecting bottle, it indicates that the test system is well sealed.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a rotating table and a fixed beam to realize the relative rotation of the inner ring and the outer ring of the bearing, and then adjusting the axial radial clearance of the test bearing by adjusting the tooling, the operation of the yaw and pitch bearings of the wind turbine can be simulated, and the relative displacement and pressure conditions of the bearing sealing ring when subjected to the overturning moment on the wind turbine can be restored to the greatest extent. This test method is simple to operate, more convenient than the existing sealing test method, and improves the accuracy and reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the test system of the present invention;

[0018] Figure 2 A schematic diagram of a test bearing of the present invention;

[0019] Figure 3 It is a schematic diagram of the adjustment tooling of the present invention;

[0020] Figure 4 It is a partial enlarged view of the adjustment tool of the present invention.

[0021] In the figure, 1. test bearing; 2. rotating table; 3. adjusting tool; 4. automatic oil filling pump; 5. oil collecting bottle; 1-1. outer ring of bearing; 1-2. inner ring of bearing; 1-3. upper end face sealing ring; 1-4. lower end face sealing ring; 3-1. fixed beam; 3-2. first handle; 3-3. second handle; 3-4. third handle; 3-5. column; 3-6. fixed tool; 3-7. vertical plate. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1 To Attachment Figure 4 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, rather than to limit the scope of the present invention.

[0023] A wind turbine yaw and pitch bearing seal ring test system, comprising a test bearing 1, a rotating table 2, an adjustment tool 3, an automatic oil filling pump 4 and an oil collecting bottle 5; the test bearing 1 comprises a bearing outer ring 1-1, a bearing inner ring 1-2 and a seal ring; the bearing inner ring 1-2 is coaxially arranged with the bearing outer ring 1-1, and the seal ring is arranged between the bearing inner ring 1-2 and the bearing outer ring 1-1; the seal ring comprises an upper end face seal ring 1-3 and a lower end face seal ring 1-4, and they are respectively located on the upper and lower end faces between the bearing inner ring 1-2 and the bearing outer ring 1-1, and the seal ring and the bearing outer ring 1-1 and the bearing inner ring 1-2 form a sealed cavity, the test bearing 1 is arranged above the rotating table 2, and the bearing outer ring 1-1 or the bearing inner ring 1-2 is detachably connected to the rotating table 2, the adjusting tool 3 is arranged above the test bearing 1, and the bearing outer ring 1-1 or the bearing inner ring 1-2 is detachably connected to the adjusting tool 3, the rotating table 2 can rotate automatically, the bearing outer ring 1-1 and the bearing inner ring 1-2 form a differential rotation, the automatic oil filling pump 4 is connected to the inner cavity of the test bearing 1 through an oil pipe, and the oil collecting bottles 5 are evenly distributed along the circumference of the test bearing 1.

[0024] The bearing inner ring 1-2 is detachably connected to the rotating table 2, and the bearing outer ring 1-1 is detachably connected to the adjusting tool 3. Alternatively, the bearing outer ring 1-1 is detachably connected to the rotating table 2, and the bearing inner ring 1-2 is detachably connected to the adjusting tool 3.

[0025] The adjusting tool 3 includes a fixed beam 3-1, an adjusting device and a column 3-5, the adjusting device and the column 3-5 are respectively located at the two ends of the fixed beam 3-1, and the column 3-5 is connected to the fixing tool 3-6; the adjusting device includes a first handle 3-2, a second handle 3-3 and a third handle 3-4, and vertical plates 3-7 are arranged at both ends of the fixed beam 3-1, the first handle 3-2 is screwed to the vertical plate 3-7, and is pressed against the first surface of the fixing tool 3-6, the second handle 3-3 is screwed to the second surface of the fixing tool 3-6, and is pressed against the fixed beam 3-1, the third handle 3-4 is screwed to the third surface of the fixing tool 3-6, and is pressed against the fixed beam 3-1; the first surface, the second surface and the third surface of the fixing tool 3-6 are perpendicular to each other, and the fixing tool 3-6 is a U-shaped plate.

[0026] The test bearing 1 is provided with a plurality of oil filling holes and a plurality of oil drain holes, and the automatic oil filling pump 4 can inject grease into the test bearing 1 from the plurality of oil filling holes, and the oil drain holes are connected to the oil collecting bottle 5. The automatic oil filling pump 4 can set the oil filling time, oil filling frequency and oil filling amount.

[0027] A testing method based on a wind turbine yaw and pitch bearing seal ring testing system comprises the following steps:

[0028] Step 1: The bearing inner ring 1-2 is detachably connected to the top of the rotating platform 2. The rotating platform 2 can drive the bearing inner ring 1-2 to rotate. The rotating speed of the rotating platform 2 is adjustable and the rotating direction is variable.

[0029] Step 2: The fixed crossbeam 3-1 is detachably connected to the upper part of the bearing outer ring 1-1, and the bearing outer ring 1-1 and the bearing inner ring 1-2 above the rotating platform 2 rotate relative to each other;

[0030] Step 3: The first handle 3-2 and the second handle 3-3 cooperate with the fixed crossbeam 3-1 to adjust the axial and radial clearances of the test bearing 1, and fix the test bearing 1 and the fixed crossbeam 3-1 by operating the third handle 3-4;

[0031] Step 4: Start the rotating table 2 and the automatic oil filling pump 4, adjust the rotation speed and direction of the rotating table 2, and the oil filling time, oil filling frequency and oil filling amount of the automatic oil filling pump 4;

[0032] Step 5: Install the oil collecting bottle 5 on the outside of the test bearing 1, observe whether the upper end face sealing ring 1-3 and the lower end face sealing ring 1-4 of the test bearing 1 fall off and leak a lot of oil during the test, and observe the grease collected by the oil collecting bottle 5. When the oil injection amount is the same as the grease collected by the oil collecting bottle 5, since grease will remain in the sealing cavity of the test bearing 1, the difference between the oil injection amount and the amount of grease collected in the oil collecting bottle 5 fluctuates within a small range, and both are regarded as the same amount, indicating that the test system is well sealed.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind turbine yaw and pitch bearing seal ring testing system, characterized in that: The invention comprises a test bearing (1), a rotating table (2), an adjusting tool (3), an automatic oil injection pump (4) and an oil collecting bottle (5); the test bearing (1) comprises a bearing outer ring (1-1), a bearing inner ring (1-2) and a sealing ring; the bearing inner ring (1-2) is coaxially arranged with the bearing outer ring (1-1), and the sealing ring is arranged between the bearing inner ring (1-2) and the bearing outer ring (1-1); the sealing ring comprises an upper end face sealing ring (1-3) and a lower end face sealing ring (1-4), and the sealing rings are respectively arranged on the upper and lower end faces between the bearing inner ring (1-2) and the bearing outer ring (1-1); the sealing ring, the bearing outer ring (1-1) and the bearing inner ring (1-2) form a sealed cavity; the test bearing (1) is arranged above the rotating table (2), and the bearing outer ring (1-1) or the bearing inner ring (1-2) is detachably connected to the rotating table (2); the adjusting tool (3) is arranged on the test bearing ( 1), and the bearing outer ring (1-1) or the bearing inner ring (1-2) is detachably connected to the adjustment fixture (3), the rotating table (2) can rotate automatically, the bearing outer ring (1-1) and the bearing inner ring (1-2) form differential rotation, the automatic oil injection pump (4) is connected to the inner cavity of the test bearing (1) through an oil pipe, and the oil collecting bottles (5) are evenly distributed along the circumference of the test bearing (1); the adjustment fixture (3) comprises a fixed crossbeam (3-1), an adjustment device and a column (3-5), the adjustment device and the column (3-5) are respectively located at two ends of the fixed crossbeam (3-1), and the column (3-5) is connected to the fixed fixture (3-6); the test bearing (1) is provided with a plurality of oil injection holes and a plurality of oil discharge holes, the automatic oil injection pump (4) can inject grease into the interior of the test bearing (1) from the plurality of oil injection holes, and the oil discharge holes are connected to the oil collecting bottles (5).

2. The wind turbine yaw and pitch bearing seal ring testing system according to claim 1, characterized in that: The bearing inner ring (1-2) is detachably connected to the rotating platform (2), and the bearing outer ring (1-1) is detachably connected to the adjusting tool (3).

3. The wind turbine yaw and pitch bearing seal ring testing system according to claim 1, characterized in that: The adjustment device comprises a first handle (3-2), a second handle (3-3) and a third handle (3-4); vertical plates (3-7) are arranged at both ends of the fixed crossbeam (3-1); the first handle (3-2) is screwed to the vertical plate (3-7) and is connected to the first surface of the fixed tool (3-6) by top pressure; the second handle (3-3) is screwed to the second surface of the fixed tool (3-6) and is connected to the fixed crossbeam (3-1) by top pressure; the third handle (3-4) is screwed to the third surface of the fixed tool (3-6) and is connected to the fixed crossbeam (3-1) by top pressure; the first surface, the second surface and the third surface of the fixed tool (3-6) are perpendicular to each other.

4. The wind turbine yaw and pitch bearing seal ring testing system according to claim 1, characterized in that: The automatic oil injection pump (4) can be set with respect to oil injection time, oil injection frequency and oil injection amount.

5. A testing method for the wind turbine yaw and pitch bearing seal ring testing system according to claim 3, characterized in that: The following steps are involved: Step 1: The bearing inner ring (1-2) is detachably connected to the top of the rotating platform (2), and the rotating platform (2) can drive the bearing inner ring (1-2) to rotate; Step 2: The fixed crossbeam (3-1) is detachably connected to the top of the bearing outer ring (1-1), and the bearing outer ring (1-1) and the bearing inner ring (1-2) above the rotating platform (2) rotate relative to each other; Step three: the first handle (3-2) and the second handle (3-3) cooperate with the fixed crossbeam (3-1) to adjust the axial and radial clearances of the test bearing (1), and the test bearing (1) and the fixed crossbeam (3-1) are fixed by operating the third handle (3-4); Step 4: starting the rotating table (2) and the automatic oil injection pump (4), adjusting the rotation speed and direction of the rotating table (2), and the oil injection time, oil injection frequency and oil injection amount of the automatic oil injection pump (4); Step 5: Install the oil collecting bottle (5) on the outside of the test bearing (1), observe whether the upper end face sealing ring (1-3) and the lower end face sealing ring (1-4) of the test bearing (1) fall off and leak a lot of oil during the test, and observe the grease collected by the oil collecting bottle (5). When the amount of oil injected is the same as the amount of grease collected by the oil collecting bottle (5), it indicates that the test system is well sealed.

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