Wind power sealing ring test bench

Abstract

The invention discloses a wind power sealing ring test bench which comprises an overturning table capable of overturning by an angle, an outer positioning unit, an inner positioning unit and a driving unit for driving the inner positioning unit to rotate are arranged on the overturning table, and a sealing unit internally provided with a test sealing ring is arranged between the inner positioning unit and the outer positioning unit. A plurality of conditions are combined to simulate different working conditions so as to test the sealing unit. The problem that a sealing ring test bench in the prior art cannot adapt to different working conditions for testing is solved.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment manufacturing technology, specifically to a wind power sealing ring test bench. Background Technology

[0002] The transmission system (including the main shaft, gearbox, generator, etc.) and actuators (such as pitch control and yaw mechanisms) of wind turbines are the core carriers for converting wind energy into mechanical energy and then into electrical energy. Their operating status is crucial to the overall performance of the unit. The normal operation of these components highly depends on the continuous action of the lubricating medium to achieve friction and wear control, heat conduction, and component protection. As a key component for sealing the lubrication system and isolating it from the external environment, the sealing ring undertakes the core function of a "protective barrier." Throughout the service life of a wind turbine, the sealing ring must be exposed to extremely complex operating conditions and face multiple harsh tests: in terms of temperature, it must adapt to a wide range of temperature fluctuations from -40°C in frigid regions to above 60°C in tropical regions; in terms of mechanical loads, the multi-axis rotation, vibration, and pitch and yaw actions of the transmission system will subject the sealing ring to periodic compression, tension, and shear loads; in terms of environmental corrosion, the high salt spray and high humidity environment of offshore and coastal wind farms, as well as the dust and ultraviolet radiation of onshore wind farms, will all have a continuous degradation effect on the material properties of the sealing ring.

[0003] The functional integrity of the sealing ring directly determines the operational safety of the transmission system. Once the sealing ring fails due to material aging, structural failure, or performance degradation, it will directly lead to lubricant leakage, causing not only lubricant loss and environmental pollution, but also depriving transmission components of effective lubrication protection, exacerbating friction and wear. Simultaneously, pollutants from the external environment such as salt spray, dust, and water vapor will directly penetrate the transmission system, triggering a chain reaction of failures such as abnormal gear meshing, bearing corrosion, and shaft jamming, ultimately potentially damaging the entire transmission system. According to industry statistics, sealing ring failure accounts for over 20% of wind turbine failures, with repair costs for a single failure reaching hundreds of thousands of yuan, and causing the unit to shut down for weeks, resulting in huge economic and energy output losses. Therefore, ensuring the long-term reliability of sealing rings under extreme operating conditions is of paramount engineering importance.

[0004] To ensure the reliability of wind turbine sealing rings during service, before they are put into practical application, their key indicators such as sealing performance, aging resistance, and media resistance must be comprehensively evaluated through a dedicated test bench. This will simulate the performance degradation process under actual working conditions and provide data support for the selection of sealing rings, material improvement, and structural optimization. However, existing sealing ring test benches on the market generally suffer from two problems, making it difficult to meet the testing requirements of sealing rings for wind power generation equipment: First, their operating condition simulation capabilities are insufficient. Most test benches can only perform tests under single temperature and pressure conditions, failing to accurately reproduce the complex coupled operating conditions in wind power generation scenarios, such as wide-temperature-range cycling, multi-axis composite loads, salt spray, and humidity-induced corrosion. This results in significant deviations between test results and the actual service performance of the sealing rings, making it difficult to effectively predict their failure risks in practical applications. Second, their equipment versatility is poor. The sealing chambers, clamping mechanisms, and power output modules of existing test benches are mostly designed with fixed structures, only suitable for sealing rings of specific sizes and models. However, the sealing rings in different parts of wind power generation equipment (such as the main shaft, gearbox input shaft, and pitch bearing) vary significantly in diameter, cross-sectional structure, and installation method. This necessitates frequent structural modifications to the test benches to meet different testing requirements, increasing testing costs and significantly reducing testing efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that existing sealing ring test benches cannot adapt to different working conditions for testing, and to provide a wind power sealing ring test bench.

[0006] To address the shortcomings of the aforementioned technical problems, the present invention provides the following technical solution: a wind power sealing ring test bench, comprising a tilting table capable of tilting, an outer positioning unit, an inner positioning unit, and a drive unit for rotating the inner positioning unit, and a sealing unit for placing the test sealing ring between the inner positioning unit and the outer positioning unit, so as to combine multiple conditions to simulate different working conditions and test the sealing unit. The sealing unit includes an inner ring, an outer ring, and two pressure caps that form the sealing ring space of the sealing test, and the outer ring is provided with a mating interface. The flipping table includes a base and a flipping plate as the flipping surface. The outer edge of the flipping plate is driven by a power push rod on the base to flip around the flipping center. The flipping center of the flipping plate is rotatably connected to the base. The inner positioning unit includes a rotating disk and a transmission housing located at the center of the rotating disk. The transmission housing is driven by a drive unit, and the rotating disk is provided with multiple clamping sleeves arranged along the radial direction of the rotating disk. The clamping sleeves can clamp and position the two pressure caps and the inner ring through the second bolts, and drive the two pressure caps, the inner ring and the test sealing ring to rotate. The external positioning unit includes multiple base frames mounted on the flip plate, which can cooperate with the flip plate to lock the outer ring position.

[0007] As a further optimization of the wind power sealing ring test bench of the present invention: a sliding plate is connected to the side of the clamping sleeve facing the transmission housing, the sliding plate is slidably connected to a second slide rail, the second slide rail is fixedly mounted on the rotating disk, the second slide rail is distributed along the radial direction of the rotating disk, and a second screw is rotatably connected inside the second slide rail, the second screw is threadedly connected to the sliding plate.

[0008] As a further optimization of the wind power sealing ring test bench of the present invention: the transmission housing is provided with an adjustment motor that drives the second screw and a displacement sensor. The displacement sensor can measure the distance between the clamping sleeve and the center of the transmission housing, so as to electrically control the rotation of the motor.

[0009] As a further optimization of the wind power sealing ring test bench of the present invention: the clamping sleeve is a split structure, and the upper and lower parts of the clamping sleeve are connected together by a combination bolt.

[0010] As a further optimization of the wind power sealing ring test bench of the present invention: the rotating disk includes multiple support plates arranged along the radial direction of the transmission housing, and two adjacent support plates are connected together by a connecting rod.

[0011] As a further optimization of the wind power sealing ring test bench of the present invention: the base frame is slidably connected with a first slide rail, the first slide rail is fixedly connected to an auxiliary chassis provided on the flip plate, the first slide rail is distributed along the radial direction of the auxiliary chassis, and a first screw threadedly connected to the base frame is rotatably connected inside the first slide rail, and a handwheel is connected to the end of the first screw that is away from the transmission housing through the first slide rail.

[0012] As a further optimization of the wind power sealing ring test bench of the present invention: four vertical rods are fixedly connected to the base, and the top ends of the two vertical rods facing the rotation center of the flip plate are provided with first hinge seats, and the first hinge seats are rotatably connected to the second hinge seats provided on the flip plate.

[0013] As a further optimization of the wind power sealing ring test bench of the present invention: shock-absorbing pads are fixedly connected to the ends of the two vertical rods located away from the rotation center of the flip plate.

[0014] As a further optimization of the wind power sealing ring test bench of the present invention: the outer edge of the flip plate is provided with a third hinge seat, the third hinge seat is rotatably connected to the telescopic end of the power push rod, and the fixed end of the power push rod is rotatably connected to the base.

[0015] As a further optimization of the wind power sealing ring test bench of the present invention: the drive unit includes a commutator and a driver fixedly mounted on the flip plate, the output end of the commutator is connected to the transmission housing, and the input end of the commutator is connected to the driver.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention uses an inner and outer positioning unit to lock and position the sealing unit, allowing it to hold a test sealing ring and be injected with appropriate pressure and medium to simulate the working conditions of the test sealing ring. Simultaneously, by driving the inner positioning unit's drive unit, the inner ring, two pressure caps, and the test sealing ring within the sealing unit are stably rotated, simulating the rotational operation of the test sealing ring. Furthermore, a tilting table connecting the outer positioning unit, drive unit, and inner positioning unit allows for the simulation and adjustment of the working environment at the sealing unit's angle. This facilitates operators in selecting and combining various conditions such as medium, pressure, rotation speed, and angle, enabling them to simulate the working conditions of most test sealing rings for testing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the axial structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4 This is an exploded structural diagram of the tilting table of the present invention; Figure 5 This is an exploded structural diagram of the sealing unit of the present invention; The diagram shows the following markings: 1. Tilting table; 101. Rolling wheel; 102. Base; 103. First hinge; 104. Second hinge; 105. Tilting plate; 106. Third hinge; 107. Power push rod; 108. Shock-absorbing pad; 109. Auxiliary chassis; 2. Drive unit; 201. Driver; 202. Reversing device; 3. External positioning unit; 301. Handwheel; 302. First slide rail; 303. First screw; 304. Pressing plate; 305. Base frame; 4. Internal positioning unit; 401. Clamping sleeve; 402. Sliding plate; 403. Second slide rail; 404. Rotary disk; 405. Adjusting motor; 406. Transmission housing; 407. Displacement sensor; 408. Second screw; 5. Sealing unit; 501. Outer ring; 502. Inner ring; 503. Pressure cap; 6. Test sealing ring. Detailed Implementation

[0018] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0019] like Figure 1 , Figure 2 and Figure 3As shown, a wind turbine sealing ring test bench includes a sealing unit 5 capable of sealing a test sealing ring 6 and a tilting platform 1 serving as support. The sealing unit 5 is locked and positioned onto a drive unit 2 by an outer positioning unit 3 and an inner positioning unit 4, both of which are located on the drive unit 2. The drive unit 2 is supported and positioned by the tilting platform 1. The tilting platform 1 can drive the drive unit 2 to different angles, and the drive unit 2 can rotate the sealing unit 5, which is locked and positioned by the outer positioning unit 3 and the inner positioning unit 4, at different angles. Different media can be injected into the sealing unit 5, and different sensors can be connected to the sealing unit 5. The pressure value inside the sealing unit 5 can also be adjusted, thus facilitating operators to simulate different conditions and test the sealing ring 6 under different working conditions.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the sealing unit 5 includes an outer ring 501 and an inner ring 502 that press the inner and outer sides of the test sealing ring. The top and bottom of the sealing ring are respectively provided with pressure caps 503 covering the outer ring 501 and the inner ring 502, thereby sealing the sealing unit 5 into a closed environment. The inner ring 502 is mainly used for symmetrically installing the test sealing ring 6. The assembled inner ring 502 and the test sealing ring 6 are then installed inside the outer ring 501. The pressure caps 503 then press the test sealing rings 6 on both sides and fix them to the inner ring 502 with the first bolt. During the test, the inner ring 502, the test sealing ring 6, and the two pressure caps 503 at the top and bottom rotate together, while the outer ring 501 remains fixed. The outer ring 501 has a connection interface that can be connected to external equipment. The sealing unit 5 can simulate different working environments by injecting media or applying pressure within the sealed space, or by setting up test sensors within the sealed space, to test the test sealing ring 6.

[0021] like Figure 1 , Figure 2 as well as Figure 4As shown, the tilting platform 1 includes a base 102 as a bottom support and a tilting plate 105 as a tilting plane. The base 102 has four vertical rods with their tops flush. Two of the vertical rods near the tilting center of the tilting plate 105 have first hinge seats 103 at their tops. The tilting plate 105 has two second hinge seats 104 and two third hinge seats 106 distributed along its length. The first hinge seats 103 are rotatably connected to the second hinge seats, and the third hinge seats 106 are rotatably connected to the telescopic end of the power push rod 107. The fixed end of the power push rod 107 is rotatably mounted on the base 102. A drive unit 2 and an auxiliary chassis 109 that can connect to an external positioning unit 3 are also fixedly connected to the tilting platform. In practical use, the push of the power push rod 107 will push one side of the flipping plate 105 upward through the third hinge seat 106. Then, it will be flipped through the rotational connection of the first hinge seat 103 and the second hinge seat 104 as the flipping center. That is, when installing the sealing unit 5, the flipping plate 105 is adjusted to a horizontal position. After the sealing unit 5 of the test sealing ring 6 is installed through the inner positioning unit 4 and the outer positioning unit 3, the sealing unit 5 can be adjusted to any angle from 0 to 90 degrees for testing by the auxiliary chassis 109. The tops of the two vertical rods opposite to the flipping center of the flipping plate 105 are fixedly connected with shock-absorbing pads 108 to reduce the vibration during the push of the power push rod 107 when the flipping plate 105 is placed horizontally. Rolling wheels 101 are provided at the four corners of the bottom of the base 102. The rolling wheels 101 are equipped with locking structures so that the operator can move the flipping table 1 and position the flipping table 1 after it is moved to a suitable position.

[0022] like Figure 1 , Figure 3 as well as Figure 5As shown, the inner positioning unit 4 includes a rotating disk 404, with a transmission housing 406 fixedly connected to its center. The transmission housing 406 is connected to the rotation output end of the drive unit 2 to drive the rotating disk 404 to rotate stably. The rotating disk 404 includes five support plates radiating outward from its center. Each of the five support plates is provided with a second slide rail 403 along its extension direction, enabling the rotating disk 404 to drive the five second slide rails 403 to rotate stably. The multiple support plates are connected and reinforced by connecting rods, allowing the rotating disk 404 to withstand large torque loads, while preventing overloading of a single support plate even when the five support plates form a whole. Each of the five second slide rails 403 is slidably connected to a sliding plate 402. A clamping sleeve 401 is fixedly connected to the end of the sliding plate 402 away from the center of the rotating disk 404. The clamping sleeve 401 connects to the two pressure caps 503 and the inner ring 502 via second bolts. Thus, during the rotation of the rotating disk 404, the clamping sleeve 401 drives the inner ring 502, the two pressure caps 503, and the experimental sealing ring to rotate stably, simulating the working environment of the experimental sealing ring under rotational conditions. The sliding plate 402 is threadedly connected to a second screw 408 rotatably disposed within the second slide rail 403. The second screw 408 is driven by an adjusting motor 405 connected to the transmission housing 406. Each second slide rail 403 and sliding plate 402 has a dovetail groove cross-section, enabling the second slide rail 403 and sliding plate 402 to withstand large tangential loads and achieve high-precision distance adjustment. The support housing is also equipped with displacement sensors 407 corresponding to the positions of the five clamping sleeves 401, which facilitates the operator to monitor the radius of the inner ring 502 that the five clamping sleeves 401 can hold. Specifically, the adjusting motor 405 drives the second screw 408 to rotate, thereby causing the sliding plate 402 to slide on the second slide rail 403. This allows the support radius of the clamping sleeves 401 to be adjusted. During the adjustment of the positions of the five clamping sleeves 401, the displacement sensors 407 are used to measure the positions of the clamping sleeves 401, thus achieving closed-loop control of the support radius by the adjusting motor 405. Specifically, the displacement sensor 407 is an infrared displacement sensor, and the second slide rail 403 is fixed to the rotating disk 404 by a third bolt. The clamping sleeves 401 are designed as separate upper and lower parts to accommodate different specifications of test fixtures.

[0023] The external positioning unit 3 includes multiple first slide rails 302, each fixed to the auxiliary chassis 109 by a fourth bolt for positioning. The multiple first slide rails 302 are evenly arranged along the radial direction of the auxiliary chassis 109. A base frame 305 is slidably connected to each first slide rail 302. Both the base frame 305 and the first slide rail 302 have dovetail groove cross-sections, allowing them to withstand large tangential loads and achieve high-precision distance adjustment. A first screw 303, threadedly connected to the base frame 305, is rotatably connected to each first slide rail 302. The first screw 303 extends out of the first slide rail 302 away from the center of the rotating disk 404 and is connected to a deflector. The deflector is driven by a handwheel 301 for operator control, allowing adjustment of the positions of the multiple base frames 305 to accommodate different sized outer rings 501. Furthermore, a vertically displaceable pressure plate 304 is slidably connected to the base frame 305. The pressure plate 304 is connected to the base frame 305 by the fifth bolt to adapt to its own height position, thereby cooperating with the first slide rail 302 to press and fix the position of the outer ring 501.

[0024] The drive unit 2 includes a driver 201 and a commutator 202 mounted on the flip plate 105. The output end of the commutator 202 is connected to the transmission housing 406, and the input end of the commutator 202 is driven by the driver 201, thereby driving the rotating disk 404 to rotate stably. That is, the inner ring 502, the two pressure caps 503 and the test sealing ring 6 are driven to rotate through the inner positioning unit 4 to simulate the working environment of the test sealing ring 6 under rotation.

[0025] In this embodiment, both the commutator 202 and the inverter adopt a bevel gear transmission structure, and their specific structure and operation should be considered as prior art. The displacement sensor 407, especially the infrared displacement sensor 407, should also be considered as prior art in terms of its model and operation. Furthermore, the specific method and principle of controlling and adjusting the rotation of the motor 405 using the displacement sensor 407 should also be considered as prior art. In addition, the specific motor model used in the driver 201, the specific model used in the power push rod 107, and the operating principles of the driver 201 and the power push rod 107 should also be understood as prior art.

[0026] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A wind power seal ring test bench, characterized in that: The utility model provides a test device for sealing ring, including can overturn angle's turnover platform (1), be equipped with outer positioning unit (3), inner positioning unit (4) and drive unit (2) of drive inner positioning unit (4) rotation on turnover platform (1), and be equipped with the sealing unit (5) of inner part of inner positioning unit (4) and outer positioning unit (3) between with the test seal ring (6) of placing between the inside of sealing unit (5) carries out inspection to the sealing unit (5) with the simulation of different working conditions to a variety of conditions combination; The sealing unit (5) includes an inner ring (502), an outer ring (501), and two gland covers (503) that form a space for the sealing test seal ring (6), and the outer ring (501) is provided with a docking port; The turnover platform (1) includes a base (102) and a turnover plate (105) as a turnover surface, the turnover plate (105) is driven by a power push rod (107) provided on the base (102) to rotate around a turnover center, and the turnover center of the turnover plate (105) is rotationally connected with the base (102); The inner positioning unit (4) includes a rotating disc (404) and a transmission housing (406) provided at the center of the rotating disc (404), the transmission housing (406) is driven by the drive unit (2), and the rotating disc (404) is provided with a plurality of clamping sleeves (401) arranged along the radial direction of the rotating disc (404), the clamping sleeves (401) can clamp and position the two gland covers (503) and the inner ring (502) through the second bolts, and drive the two gland covers (503), the inner ring (502), and the test seal ring (6) to rotate; The outer positioning unit (3) includes a plurality of base frames (305) provided on the turnover plate (105), and the plurality of base frames (305) can cooperate with the turnover plate (105) to lock the position of the outer ring (501).

2. The wind power sealing ring test bench according to claim 1, characterized in that: The side of the clamping sleeve (401) facing the transmission housing (406) is connected with a sliding plate (402), the sliding plate (402) is slidingly connected with a second slide rail (403), the second slide rail (403) is fixedly provided on the rotating disc (404), the second slide rail (403) is distributed along the radial direction of the rotating disc (404), and the second slide rail (403) is rotationally connected with a second screw rod (408), and the second screw rod (408) is threadedly connected with the sliding plate (402).

3. The wind power sealing ring test bench of claim 2, wherein: The transmission housing (406) is provided with an adjustment motor (405) and a displacement sensor (407) for driving the second screw rod (408), and the displacement sensor (407) can measure the distance between the clamping sleeve (401) and the center of the transmission housing (406) to adjust the rotation amount of the adjustment motor (405) by electric control.

4. The wind power sealing ring test bench of claim 1, wherein: The clamping sleeve (401) has an upper and lower split structure, and the upper and lower parts of the clamping sleeve (401) are connected together by combination bolts.

5. The wind power sealing ring test bench of claim 1, wherein: The rotating disc (404) includes a plurality of support plates arranged along the radial direction of the transmission housing (406), and adjacent two support plates are connected together by a connecting rod.

6. The wind power sealing ring test bench of claim 1, wherein: The base frame (305) is slidingly connected with a first slide rail (302), the first slide rail (302) is fixedly connected on an auxiliary chassis (109) arranged on the turnover plate (105), the first slide rail (302) is distributed along the radiation direction of the auxiliary chassis (109), and the first slide rail (302) is rotationally connected with a first screw rod (303) which is threadedly connected with the base frame (305), and the first screw rod (303) is connected with a hand wheel (301) at an end thereof which is away from the transmission housing (406) and penetrates through the first slide rail (302).

7. The wind power sealing ring test bench of claim 1, wherein: The base (102) is fixedly connected with four vertical rods, and the top ends of two vertical rods which are towards the rotation center of the turnover plate (105) are provided with first hinge seats (103), the first hinge seats (103) are rotationally connected with second hinge seats (104) arranged on the turnover plate (105).

8. The wind power sealing ring test bench of claim 7, wherein: The end portions of two vertical rods which are away from the rotation center of the turnover plate (105) are fixedly connected with shock pads (108).

9. The wind power seal test bench of claim 1, wherein: The turnover plate (105) is provided with third hinge seats (106) at the outer edge thereof, the third hinge seats (106) are rotationally connected with the telescopic end of a power push rod (107), and the fixed end of the power push rod (107) is rotationally connected with the base (102).

10. The wind power seal test bench of claim 1, wherein: The driving unit (2) comprises a commutator (202) and a driver (201) which are fixedly arranged on the turnover plate (105), the output end of the commutator (202) is drivingly connected with the transmission housing (406), and the input end of the commutator (202) is drivingly connected with the driver (201).

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