Electric field fan gearbox low speed shaft system axle holding prevention device

Abstract

The utility model relates to fan gear box technical field especially relates to a kind of electric field fan gear box low-speed shaft system axle holding prevention device, it includes wind power gear transmission case, wind power gear transmission case front side is provided with mounting groove, and mounting groove inboard is provided with anti-axle holding bearing assembly;Anti-axle holding bearing assembly includes cooling cylinder, cooling cylinder is fixedly installed on the inner wall of mounting groove, high-strength bearing is fixedly installed in cooling cylinder inboard, air inlet duct is communicated and installed on cooling cylinder upside, air inlet duct passes to wind power gear transmission case upside and air inlet duct upside fixed mounting has conical bucket.The utility model is provided with anti-axle holding bearing assembly, utilizes the working stability of wind cooling effect reduction middle high-strength bearing, to improve the stability of high-strength bearing, reduce axle holding failure rate, additionally set up sealing ring plate, can prevent foreign matter invasion, improve the stability of bearing, also equipped with automatic oil supply lubricating system, comprehensive reduce axle holding failure rate.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine gearbox technology, and in particular to a device for preventing shaft seizure in the low-speed shaft system of an electric field wind turbine gearbox. Background Technology

[0002] The wind turbine gearbox is one of the core transmission components of a wind turbine generator set. Its main function is to convert the natural wind energy captured by the wind turbine (blades) into mechanical energy suitable for generator power generation.

[0003] During the operation of wind turbines in electric fields, the problem of shaft seizure in the low-speed gearbox system is relatively common and poses a significant hazard. Shaft seizure can be caused by a variety of factors, including foreign object intrusion, high bearing temperature, design flaws, insufficient lubrication, and excessive workload. This not only affects the reliability and economic efficiency of wind turbine operation but also poses a threat to the stable operation of the power grid. Existing methods for preventing shaft seizure have certain limitations. For example, regular maintenance and inspection cannot completely eliminate the phenomenon, and while selecting appropriate lubricating oil can reduce the risk, it cannot fundamentally solve the problem. Controlling the workload also faces many challenges in actual operation.

[0004] To address the aforementioned issues, we propose a shaft seizure prevention device for the low-speed shaft system of an electric fan gearbox. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a shaft seizure prevention device for the low-speed shaft system of an electric fan gearbox.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A shaft seizure prevention device for a low-speed shaft system of a wind turbine gearbox includes a wind turbine gearbox. A mounting groove is provided on the front side of the gearbox, and an anti-seizure bearing assembly is provided inside the mounting groove. The anti-seizure bearing assembly includes a cooling cylinder, which is fixedly installed on the inner wall of the mounting groove. A high-strength bearing is fixedly installed inside the cooling cylinder. An air inlet duct is connected to the upper side of the cooling cylinder, extending through to the upper side of the wind turbine gearbox, and a conical hopper is fixedly installed on the upper side of the air inlet duct. An air outlet duct is connected to the lower side of the cooling cylinder, extending through to the lower side of the wind turbine gearbox. A low-speed shaft is fixedly installed inside the high-strength bearing.

[0008] Furthermore, a windshield is fixedly installed on the upper side of the wind turbine gearbox, the conical bucket is located inside the windshield, and the windshield is curved.

[0009] Furthermore, a dustproof net is fitted on the upper side of the cone-shaped hopper.

[0010] Furthermore, a partition plate is fixedly connected to the side wall of the cooling cylinder, and the partition plate penetrates the interior of the cooling cylinder.

[0011] Furthermore, a lubricating oil tank and an oil supply pump are fixedly installed on the upper side of the wind turbine gear transmission box. The lubricating oil tank is connected to the suction end of the oil supply pump. A connecting pipe is installed between the oil supply pump and the high-strength bearing. A sealing cap is screwed onto the upper side of the lubricating oil tank.

[0012] Furthermore, annular grooves are provided at both ends of the high-strength bearing, and sealing ring plates are snapped into the inner side of the annular grooves.

[0013] Furthermore, the inner ring of the sealing ring plate is provided with a thin-walled region, and the inner ring of the thin-walled region is provided with a toothed inner ring.

[0014] Furthermore, a control circuit board is fixedly installed on the side wall of the wind turbine gearbox.

[0015] Compared with related technologies, the bearing seizure prevention device for the low-speed shaft system of an electric fan gearbox proposed in this utility model has the following beneficial effects:

[0016] This invention discloses a shaft seizure prevention device for a low-speed shaft system of an electric wind turbine gearbox. The device utilizes an anti-seizure bearing assembly with a cooling cylinder fixedly fitted around the outside of a high-strength bearing. A wind deflector on the upper side of the wind turbine gearbox draws air into a conical hopper, which amplifies the airflow, allowing the gas to enter the inlet duct at a certain velocity. The gas then surrounds the cooling cylinder and is discharged through the outlet duct. This air cooling reduces the operational instability of the high-strength bearing, thereby improving its stability and reducing the seizure rate. Additionally, sealing rings are installed at both ends of the high-strength bearing to prevent foreign object intrusion and further enhance bearing stability. An automatic lubrication system is also included to reduce bearing friction and further decrease the seizure rate, thus improving practicality. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of a shaft seizure prevention device for a low-speed shaft system of an electric fan gearbox proposed in this utility model. Figure 1 ;

[0018] Figure 2 A three-dimensional structural diagram of a shaft seizure prevention device for a low-speed shaft system of an electric fan gearbox proposed in this utility model. Figure 2 ;

[0019] Figure 3 This is a three-dimensional structural diagram of the anti-seize bearing assembly;

[0020] Figure 4 This is a schematic diagram of the three-dimensional disassembly structure of the bearing;

[0021] Figure 5 This is a three-dimensional structural diagram of the sealing ring plate.

[0022] In the diagram: 1. Wind turbine gearbox; 2. Windshield; 3. Low-speed shaft; 4. Mounting slot; 5. Anti-seize bearing assembly; 51. Cooling cylinder; 52. Air inlet; 53. Conical hopper; 54. Dustproof net; 55. Air outlet; 56. Middle partition; 57. High-strength bearing; 58. Ring groove; 59. Sealing ring plate; 510. Lubricating oil tank; 511. Oil supply pump; 512. Connecting pipe; 513. Sealing cap; 514. Thin-walled area; 515. Toothed inner ring; 6. Control circuit board. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Reference Figures 1-5 A shaft seizure prevention device for a low-speed shaft system of a wind turbine gearbox: including a wind turbine gearbox 1, a mounting groove 4 on the front side of the wind turbine gearbox 1, and an anti-seizure bearing assembly 5 on the inner side of the mounting groove 4; the anti-seizure bearing assembly 5 includes a cooling cylinder 51, which is fixedly installed on the inner wall of the mounting groove 4, and a high-strength bearing 57 is fixedly installed on the inner side of the cooling cylinder 51. An air inlet duct 52 is connected to the upper side of the cooling cylinder 51, which passes through to the upper side of the wind turbine gearbox 1 and has a cone hopper 53 fixedly installed on the upper side of the air inlet duct 52. An air outlet duct 55 is connected to the lower side of the cooling cylinder 51, which passes through to the lower side of the wind turbine gearbox 1, and a low-speed shaft 3 is fixedly installed on the inner side of the high-strength bearing 57.

[0025] In this method, a windshield 2 is fixedly installed on the upper side of the wind turbine gearbox 1, and the cone 53 is located inside the windshield 2. The windshield 2 is curved.

[0026] With the above-mentioned configuration, the windshield 2 is curved, which allows the airflow to be directed into the inner cone 53. The cone 53 has an air-gathering function, resulting in a faster airflow rate into the air intake duct 52 through the cone 53, thus improving the air-cooling effect.

[0027] In this method, a dustproof net 54 is fitted on the upper side of the cone 53.

[0028] By using the above method, dust and other debris are prevented from entering the air-cooling system.

[0029] In this configuration, a partition plate 56 is fixedly connected to the side wall of the cooling cylinder 51, and the partition plate 56 penetrates the interior of the cooling cylinder 51.

[0030] By setting up the partition plate 56 as described above, the interior of the cooling cylinder 51 is separated, so that when air enters the cooling cylinder 51 through the air inlet duct 52, it must circle the inner wall of the cooling cylinder 51 before it can be discharged from the air outlet duct 55 on the lower side, thus avoiding airflow turbulence inside the cooling cylinder 51 and ensuring the air cooling effect.

[0031] In this method, a lubricating oil tank 510 and an oil supply pump 511 are fixedly installed on the upper side of the wind turbine gearbox 1. The lubricating oil tank 510 is connected to the suction end of the oil supply pump 511. A connecting pipe 512 is installed between the oil supply pump 511 and the high-strength bearing 57. A sealing cap 513 is screwed onto the upper side of the lubricating oil tank 510. A control circuit board 6 is fixedly installed on the side wall of the wind turbine gearbox 1.

[0032] With the above-mentioned settings, the control circuit board 6 periodically controls the oil supply pump 511 to start, drawing a portion of the lubricating oil from the lubricating oil tank 510 and inputting it into the high-strength bearing 57 through the connecting pipe 512, thereby reducing the frictional wear of the high-strength bearing 57.

[0033] In this method, annular grooves 58 are provided at both ends of the high-strength bearing 57, and sealing ring plates 59 are snapped into the inner side of the annular grooves 58. A thin-walled region 514 is provided in the inner ring of the sealing ring plate 59, and a toothed inner ring 515 is provided in the inner ring of the thin-walled region 514.

[0034] By configuring the sealing ring plate 59 as described above, the balls at both ends of the high-strength bearing 57 are placed in a sealed environment, preventing foreign matter from entering and also preventing lubricating oil from flowing away. Since the bearing is divided into inner and outer rings, the thin-walled area 514 and the toothed inner ring 515 on the inner side result in a larger clamping friction of the sealing ring plate 59 when it is clamped at the end of the high-strength bearing 57, while the clamping friction of the inner ring is smaller. This allows the outer ring of the sealing ring plate 59 to remain relatively stationary with the outer ring of the bearing. When the low-speed shaft 3 is working, it drives the inner ring of the high-strength bearing 57 to rotate, causing the inner ring of the sealing ring plate 59 to rotate relative to the inner ring of the high-strength bearing 57. The thin-walled area 514 and the toothed inner ring 515 on the inner side reduce the frictional loss of the sealing ring plate 59.

[0035] The working principle of the anti-shaft seizure device for the low-speed shaft system of the electric fan gearbox provided by this utility model is as follows:

[0036] When the wind turbine is running, the wind turbine gearbox 1 drives the low-speed shaft 3 to rotate, at which time the anti-seize bearing assembly 5 activates its protective mechanism. The wind deflector 2 has a curved structure, which can guide the external airflow to the inner cone 53. The cone 53 enhances the airflow rate through the aggregation effect. The airflow enters the air inlet duct 52 after being filtered by the dust filter 54. Since the cooling cylinder 51 is equipped with a partition 56, the airflow needs to circulate around the inner wall of the cooling cylinder 51 to fully absorb the heat generated by the high-strength bearing 57 during operation, and finally discharge it from the air outlet duct 55. The continuous air cooling reduces the working temperature of the high-strength bearing 57, avoiding the risk of seizure due to high temperature. At the same time, the control circuit board 6 triggers the oil supply pump 511 according to the set cycle, pumping the lubricating oil in the lubricating oil tank 510 into the high-strength bearing 57 through the connecting pipe 512 to provide continuous lubrication for the bearing balls and reduce friction loss. The sealing cap 513 can keep the lubricating oil tank 510 sealed to prevent lubricating oil leakage or contamination.

[0037] In terms of sealing protection, sealing ring plates 59 are fitted into the annular grooves 58 at both ends of the high-strength bearing 57. The outer ring of the sealing ring plate 59 fits tightly against the outer ring of the bearing, forming a closed space to prevent foreign objects from entering. The thin-walled area 514 and toothed inner ring 515 of the inner ring of the sealing ring plate 59 can reduce the frictional resistance between it and the low-speed shaft 3 (which drives the inner ring of the bearing to rotate), ensuring the sealing effect and reducing its own wear, further improving the operational stability of the high-strength bearing 57, thereby effectively preventing the bearing from seizing.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for preventing shaft seizure in the low-speed shaft system of an electric fan gearbox, characterized in that, The wind turbine gearbox (1) is provided with a mounting groove (4) on the front side of the wind turbine gearbox (1) and an anti-seize bearing assembly (5) is provided inside the mounting groove (4). The anti-seize bearing assembly (5) includes a cooling cylinder (51), which is fixedly installed on the inner wall of the mounting groove (4). A high-strength bearing (57) is fixedly installed on the inner side of the cooling cylinder (51). An air inlet duct (52) is connected to the upper side of the cooling cylinder (51). The air inlet duct (52) passes through to the upper side of the wind turbine gearbox (1), and a cone bucket (53) is fixedly installed on the upper side of the air inlet duct (52). An air outlet duct (55) is connected to the lower side of the cooling cylinder (51). The air outlet duct (55) passes through to the lower side of the wind turbine gearbox (1). A low-speed shaft (3) is fixedly installed on the inner side of the high-strength bearing (57).

2. The anti-shaft seizure device for low-speed shaft system of electric fan gearbox according to claim 1, characterized in that, A windshield (2) is fixedly installed on the upper side of the wind turbine gearbox (1), and the cone bucket (53) is located inside the windshield (2). The windshield (2) is curved.

3. The anti-shaft seizure device for low-speed shaft system of electric fan gearbox according to claim 1, characterized in that, A dustproof net (54) is fitted on the upper side of the cone (53).

4. The anti-shaft seizure device for low-speed shaft system of electric fan gearbox according to claim 1, characterized in that, A partition plate (56) is fixedly connected to the side wall of the cooling cylinder (51), and the partition plate (56) penetrates the interior of the cooling cylinder (51).

5. The anti-shaft seizure device for low-speed shaft system of electric fan gearbox according to claim 1, characterized in that, A lubricating oil tank (510) and an oil supply pump (511) are fixedly installed on the upper side of the wind turbine gear transmission box (1). The lubricating oil tank (510) is connected to the suction end of the oil supply pump (511). A connecting pipe (512) is installed between the oil supply pump (511) and the high-strength bearing (57). A sealing cap (513) is screwed onto the upper side of the lubricating oil tank (510).

6. The anti-shaft seizure device for low-speed shaft system of electric fan gearbox according to claim 1, characterized in that, The high-strength bearing (57) has annular grooves (58) at both ends, and a sealing ring plate (59) is snapped into the inner side of the annular grooves (58).

7. A shaft seizure prevention device for a low-speed shaft system of an electric fan gearbox according to claim 6, characterized in that, The inner ring of the sealing ring plate (59) is provided with a thin-walled area (514), and the inner ring of the thin-walled area (514) is provided with a toothed inner ring (515).

8. The anti-shaft seizure device for low-speed shaft system of electric fan gearbox according to claim 1, characterized in that, A control circuit board (6) is fixedly installed on the side wall of the wind turbine gearbox (1).

Images