Method for maintaining lubricating oil pipe of generator of semi-direct-driven wind generating set on tower

Abstract

The invention discloses an on-tower maintenance method for a lubricating oil pipe of a generator of a semi-direct-drive wind generating set, which comprises the following steps of: S1.1, disconnecting the threaded connection between an original connector of the lubricating oil pipe and a bearing seat; s1.2, the bearing unit is taken down, and an original connector is taken out; s1.3, a crowbar is used for adjusting the deformed, dislocated or disengaged lubricating oil pipe, so that the lubricating oil pipe is reset and fixed again; s1.4, an original oil inlet hole of the generator shell is tapped through through a screw tap, and a threaded hole is machined; s1.5, a first connector is screwed into the generator shell from the gearbox side, one end of the first connector is screwed into the threaded hole and abuts against a lubricating oil way of the bearing seat, and the other end of the first connector is connected with a 90-degree connector of a lubricating oil pipe; and S1.6, the bearing unit is reset, the bearing seat and the generator shell are connected through a connecting bolt, and maintenance of the lubricating oil pipe is completed. According to the invention, on-tower maintenance or replacement of the internal invisible lubricating oil pipe can be completed, the generator is prevented from getting off the frame, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of semi-direct drive wind turbine generator sets, and in particular to a maintenance method for the generator lubrication oil pipe tower of a semi-direct drive wind turbine generator set. Background Technology

[0002] The semi-direct drive wind turbine generator transmission system is an ultra-compact structure consisting of a generator housing and a gearbox end face. Both the generator and the gearbox are lubricated by steel pipes, which are located in the cavity formed by the generator housing and the gearbox.

[0003] Because the oil pipe is quite long, vibrations during unit operation can cause it to deform or detach. In severe cases, it may collide with the secondary planetary carrier bolts of the gearbox, leading to varying degrees of wear. Oil pipe wear can cause generator oil leaks, triggering unit malfunctions and shutdowns. In serious cases, it can also cause generator bearing overheating and damage, resulting in unavoidable economic losses. Furthermore, since the oil pipe's location prevents internal disassembly, removing the generator would be too costly and result in significant economic losses. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for on-tower maintenance of the generator lubrication oil pipe of a semi-direct drive wind turbine generator set. This method enables on-tower repair or replacement of the internally invisible lubrication oil pipe, avoiding generator removal and reducing maintenance costs.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A maintenance method for the generator lubrication oil pipe tower of a semi-direct drive wind turbine generator set requires the use of protective gaskets, hacksaw blades, and a first connector; it includes the following steps:

[0007] S1.1 Remove the connecting bolts next to the original connector of the lubricating oil pipe between the bearing housing and the generator housing. Place a protective gasket of the preset thickness in the gap between the bearing housing and the generator housing. Use a hacksaw blade to disconnect the threaded connection between the original connector and the bearing housing in the gap.

[0008] S1.2 Disconnect the remaining connecting bolts between the bearing housing and the generator housing, remove the bearing unit, and take out the original connector;

[0009] S1.3 Check for interference in the lubricating oil pipe. Use a pry bar to adjust any deformed, misaligned, or detached lubricating oil pipes, so that the lubricating oil pipes are reset and re-secured.

[0010] S1.4. Use a tap to tap through the original oil inlet hole of the generator housing and machine a threaded hole;

[0011] S1.5. Screw the first connector into the generator housing from the gearbox side, and screw one end of the first connector into the threaded hole and abut against the lubrication oil passage of the bearing seat, and connect the other end to the 90° joint of the lubrication oil pipe.

[0012] S1.6 Reset the bearing unit and connect the bearing housing to the generator housing with connecting bolts to complete the maintenance of the lubrication oil pipe.

[0013] Furthermore, the first connector includes a first connecting section for connecting a threaded hole and a second connecting section for connecting a 90° joint. The outer diameter of the first connecting section is smaller than the outer diameter of the second connecting section, and an internal thread for connecting a 90° joint is machined at the center of the second connecting section. An external thread for connecting a threaded hole is machined on the outer surface of the first connecting section, and the axial length of the external thread is consistent with the axial length of the threaded hole.

[0014] Furthermore, the protective pad has a thickness of 0.5 to 1 mm and comprises multiple thin copper sheets stacked together.

[0015] Furthermore, in step S1.5, adhesive is applied in advance to the surface of the first connector to form a sealing layer to prevent oil leakage.

[0016] A method for maintaining the generator lubrication oil pipe on the tower of a semi-direct drive wind turbine generator set requires the following components: protective gaskets, hacksaw blades, a first connector, flexible oil pipes, and flexible oil pipe fittings; the method includes the following steps:

[0017] S2.1 Remove the connecting bolts next to the original connector of the lubricating oil pipe between the bearing housing and the generator housing. Place a protective gasket of the preset thickness in the gap between the bearing housing and the generator housing. Use a hacksaw blade to disconnect the threaded connection between the original connector and the bearing housing in the gap.

[0018] S2.2 Disconnect the remaining connecting bolts between the bearing housing and the generator housing, remove the bearing unit, and take out the original connector;

[0019] S2.3. Use a tap to tap through the original oil inlet hole of the generator housing and machine a threaded hole;

[0020] S2.4 Insert the soft oil pipe from the external oil port of the generator housing along the inside of the lubricating oil pipe to the preset position, and cut the lubricating oil pipe at the preset position inside the generator housing;

[0021] S2.5. Remove the 90° connector and pull the soft oil pipe out from the cut-off position of the lubricating oil pipe. Cut the soft oil pipe to the appropriate length and connect it to one end of the soft oil pipe connector. Then connect the other end of the soft oil pipe connector to the 90° connector.

[0022] S2.6. Screw the first connector into the generator housing from the gearbox side, and screw one end of the first connector into the threaded hole and abut against the lubrication oil passage of the bearing housing, and connect the other end to the 90° connector.

[0023] S2.7 Reset the bearing unit, connect the bearing housing to the generator housing with connecting bolts, and complete the maintenance of the lubrication oil pipe.

[0024] Furthermore, the flexible oil pipe includes a flexible oil pipe body and a flange structure disposed at the end of the flexible oil pipe body. The flange structure is fixed to the external oil port of the generator housing by bolts. An oil inlet communicating with the flexible oil pipe body is formed at the center of the flange structure, and a sealing ring is provided between the flange structure and the generator housing.

[0025] Furthermore, the outer surface of the soft oil pipe is provided with a stainless steel woven protective mesh.

[0026] Furthermore, the first connector includes a first connecting section for connecting a threaded hole and a second connecting section for connecting a 90° joint. The outer diameter of the first connecting section is smaller than the outer diameter of the second connecting section, and an internal thread for connecting a 90° joint is machined at the center of the second connecting section. An external thread for connecting a threaded hole is machined on the outer surface of the first connecting section, and the axial length of the external thread is consistent with the axial length of the threaded hole.

[0027] Furthermore, the protective pad has a thickness of 0.5 to 1 mm and comprises multiple thin copper sheets stacked together.

[0028] Furthermore, in step S2.6, adhesive is applied in advance to the surface of the first connector to form a sealing layer to prevent oil leakage.

[0029] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0030] Due to the limited internal space of ultra-compact wind turbines, this invention uses only small tools to complete tower repairs or replacements of internally invisible oil pipes, avoiding back-to-tower repairs caused by generator oil leaks. This greatly reduces repair time, minimizes power generation losses due to turbine downtime, and the method is simple to operate, highly reliable, and enables long-term safe and stable operation of the generator. Attached Figure Description

[0031] Figure 1 This is a schematic diagram showing the removal of the original connector from the lubricating oil pipe.

[0032] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0033] Figure 3A schematic diagram of machining a threaded hole in the original oil inlet hole of the generator housing.

[0034] Figure 4 This is a schematic diagram of the installation of the first connector.

[0035] Figure 5 This is a schematic diagram of the structure of the first connector.

[0036] Figure 6 This is a schematic diagram showing the connection of the soft oil pipe, soft oil pipe connector, and 90° connector.

[0037] Figure 7 This is a schematic diagram of the soft oil pipe structure. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Example 1:

[0040] This embodiment provides a maintenance method for the generator lubrication oil pipe on the tower of a semi-direct drive wind turbine generator set. It is applicable to situations where the lubrication oil pipe is not ruptured but has deformed, misaligned, or detached. The method requires the use of protective gaskets, a hacksaw blade, and a first connector 6; it includes the following steps:

[0041] S1.1 Remove the connecting bolts next to the original connector of the lubricating oil pipe 3 between the bearing housing 2 and the generator housing 1. Place a protective gasket of a predetermined thickness 4 into the gap 4 between the bearing housing 2 and the generator housing 1. The thickness of the protective gasket is 0.5-1mm, and it can be composed of multiple layers of thin copper sheets. Use a hacksaw blade to operate in the gap (insert two iron wires into the fixing holes at both ends of the hacksaw blade, and twist the excess iron wire into a ball, hold the iron wire ball tightly with both hands and saw back and forth) to disconnect the threaded connection between the original connector and the bearing housing. Figures 1 to 2 As shown;

[0042] S1.2 Disconnect the remaining connecting bolts between the bearing housing 2 and the generator housing 1, remove the bearing unit 11 to provide operating space for the maintenance of the oil pipe, and then remove the original connector;

[0043] S1.3 Check the interference of lubricating oil pipe 3, use a pry bar to adjust the deformed, misaligned or detached lubricating oil pipe 3, so that the lubricating oil pipe 3 is reset and re-fixed;

[0044] S1.4. Use an M25×1 tap to tap through the existing oil inlet hole of the generator housing 1 and machine a threaded hole 5, such as... Figure 3 As shown;

[0045] S1.5. Apply adhesive to the surface of the first connector 6 to form a sealing layer to prevent oil leakage. Then screw the first connector 6 into the generator housing 1 from the gearbox side. Screw one end of the first connector 6 into the threaded hole 5 and abut against the lubrication passage 7 of the bearing seat 2. Connect the other end to the 90° connector 8 of the lubrication pipe 3. Figure 4 As shown, tighten the oil inlet pipe of the lubricating oil pipe 3 to the 90° connector 8;

[0046] S1.6 Reset the bearing unit and connect the bearing housing 2 to the generator housing 1 with connecting bolts to complete the maintenance of the lubricating oil pipe 3.

[0047] like Figure 5 As shown, the first connector 6 used in this embodiment includes a first connecting section 601 for connecting the threaded hole 5 and a second connecting section 602 for connecting the 90° connector 8. The outer diameter of the first connecting section 601 is smaller than the outer diameter of the second connecting section 602, and the center of the second connecting section 602 is machined with an internal thread for connecting the 90° connector 8. The outer surface of the first connecting section 601 is machined with an external thread for connecting the threaded hole 5, and the axial length of the external thread is consistent with the axial length of the threaded hole.

[0048] Example 2:

[0049] This embodiment provides a method for maintaining the lubricating oil pipe on the tower of a semi-direct drive wind turbine generator. It is suitable for situations where the lubricating oil pipe is ruptured, but space constraints prevent the operation of replacing the lubricating oil pipe. The method requires protective gaskets, a hacksaw blade, a first connector 6, a flexible oil pipe, and a flexible oil pipe fitting 10; it includes the following steps:

[0050] S2.1 Remove the connecting bolts next to the original connector of the lubricating oil pipe 3 between the bearing housing 2 and the generator housing 1. Place a protective gasket of a predetermined thickness 4 into the gap 4 between the bearing housing 2 and the generator housing 1. The thickness of the protective gasket is 0.5-1mm, and it can be composed of multiple layers of thin copper sheets. Use a hacksaw blade to operate in the gap (insert two iron wires into the fixing holes at both ends of the hacksaw blade, and twist the excess iron wire into a ball, hold the iron wire ball tightly with both hands and saw back and forth) to disconnect the threaded connection between the original connector and the bearing housing 2. Figures 1 to 2 As shown;

[0051] S2.2 Disconnect the remaining connecting bolts between the bearing housing 2 and the generator housing 1, remove the bearing unit to provide operating space for the maintenance of the oil pipe, and then remove the original connector;

[0052] S2.3. Use a tap to tap through the existing oil inlet hole of the generator housing 1 and machine a threaded hole 5, such as... Figure 3 As shown;

[0053] S2.4 Insert the soft oil pipe from the external oil port 101 of the generator housing 1 along the inside of the lubricating oil pipe 3 to the preset position, and cut the lubricating oil pipe at the preset position a inside the generator housing;

[0054] S2.5. Remove the 90° connector 8 and pull the flexible oil pipe out from the cut position of the lubricating oil pipe 3. Cut the flexible oil pipe to a suitable length and connect it to one end of the flexible oil pipe connector 10. Then connect the other end of the flexible oil pipe connector 10 to the 90° connector 8. Figure 6 As shown;

[0055] S2.6. Apply adhesive to the surface of the first connector 6 to form a sealing layer to prevent oil leakage. Then screw the first connector 6 into the generator housing 1 from the gearbox side, screw one end of the first connector 6 into the threaded hole 5 and abut against the lubrication oil passage 7 of the bearing seat 2, and connect the other end to the 90° connector 8.

[0056] S2.7 Reset the bearing unit, connect the bearing housing 2 to the generator housing 1 with connecting bolts, and complete the maintenance of the lubricating oil pipe 3.

[0057] like Figure 5 As shown, the first connector 6 used in this embodiment includes a first connecting section 601 for connecting the threaded hole 5 and a second connecting section 602 for connecting the 90° connector 8. The outer diameter of the first connecting section 601 is smaller than the outer diameter of the second connecting section 602, and the center of the second connecting section 602 is machined with an internal thread for connecting the 90° connector 8. The outer surface of the first connecting section 601 is machined with an external thread for connecting the threaded hole 5, and the axial length of the external thread is consistent with the axial length of the threaded hole 5.

[0058] like Figure 7 As shown, the flexible oil pipe used in this embodiment includes a flexible oil pipe body 901 and a flange structure 902 disposed at the end of the flexible oil pipe body 901. The flange structure 902 is fixed to the external oil port 101 of the generator housing 1 by bolts. An oil inlet communicating with the flexible oil pipe body is formed at the center of the flange structure. A sealing ring is provided between the flange structure 902 and the generator housing 1. A stainless steel braided protective mesh is provided on the outer surface of the flexible oil pipe to enhance the reliability of the flexible oil pipe.

[0059] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A method for on-tower maintenance of a semi-direct drive wind turbine generator set generator lubricating oil pipe, characterized in that, It needs to be equipped with protective pads, hacksaw blades, and a first connector; including the steps, S1.1 Remove the connecting bolts next to the original connector of the lubricating oil pipe between the bearing housing and the generator housing. Place a protective gasket of the preset thickness in the gap between the bearing housing and the generator housing. Use a hacksaw blade to disconnect the threaded connection between the original connector and the bearing housing in the gap. S1.2 Disconnect the remaining connecting bolts between the bearing housing and the generator housing, remove the bearing unit, and take out the original connector; S1.3 Check for interference in the lubricating oil pipe. Use a pry bar to adjust any deformed, misaligned, or detached lubricating oil pipes, so that the lubricating oil pipes are reset and re-secured. S1.

4. Use a tap to tap through the original oil inlet hole of the generator housing and machine a threaded hole; S1.

5. Screw the first connector into the generator housing from the gearbox side, and screw one end of the first connector into the threaded hole and abut against the lubrication oil passage of the bearing seat, and connect the other end to the 90° joint of the lubrication oil pipe. S1.6 Reset the bearing unit and connect the bearing housing to the generator housing with connecting bolts to complete the maintenance of the lubrication oil pipe.

2. The on-tower maintenance method of the semi-direct drive wind turbine generator set generator lubricating oil pipe according to claim 1, characterized in that, The first connector includes a first connecting section for connecting to a threaded hole and a second connecting section for connecting to a 90° joint. The outer diameter of the first connecting section is smaller than the outer diameter of the second connecting section, and an internal thread for connecting to a 90° joint is machined at the center of the second connecting section. An external thread for connecting to a threaded hole is machined on the outer surface of the first connecting section, and the axial length of the external thread is consistent with the axial length of the threaded hole.

3. The tower maintenance method of claim 1, wherein, The protective pad has a thickness of 0.5 to 1 mm and consists of multiple thin copper sheets stacked together.

4. The maintenance method for the generator lubrication oil pipe tower of a semi-direct drive wind turbine generator set according to claim 1, characterized in that, In step S1.5, adhesive is applied in advance to the surface of the first connector to form a sealing layer to prevent oil leakage.

5. A method for maintaining the generator lubrication oil pipe on the tower of a semi-direct drive wind turbine generator set, characterized in that, It needs to be equipped with protective gaskets, hacksaw blades, a first connector, a soft oil pipe, and a soft oil pipe fitting; Including steps, S2.1 Remove the connecting bolts next to the original connector of the lubricating oil pipe between the bearing housing and the generator housing. Place a protective gasket of the preset thickness in the gap between the bearing housing and the generator housing. Use a hacksaw blade to disconnect the threaded connection between the original connector and the bearing housing in the gap. S2.2 Disconnect the remaining connecting bolts between the bearing housing and the generator housing, remove the bearing unit, and take out the original connector; S2.

3. Use a tap to tap through the original oil inlet hole of the generator housing and machine a threaded hole; S2.4 Insert the soft oil pipe from the external oil port of the generator housing along the inside of the lubricating oil pipe to the preset position, and cut the lubricating oil pipe at the preset position inside the generator housing; S2.

5. Remove the 90° connector and pull the soft oil pipe out from the cut-off position of the lubricating oil pipe. Cut the soft oil pipe to the appropriate length and connect it to one end of the soft oil pipe connector. Then connect the other end of the soft oil pipe connector to the 90° connector. S2.

6. Screw the first connector into the generator housing from the gearbox side, and screw one end of the first connector into the threaded hole and abut against the lubrication oil passage of the bearing housing, and connect the other end to the 90° connector. S2.7 Reset the bearing unit, connect the bearing housing to the generator housing with connecting bolts, and complete the maintenance of the lubrication oil pipe.

6. The maintenance method for the generator lubrication oil pipe tower of a semi-direct drive wind turbine generator set according to claim 5, characterized in that, The flexible oil pipe includes a flexible oil pipe body and a flange structure disposed at the end of the flexible oil pipe body. The flange structure is fixed to the external oil port of the generator housing by bolts. An oil inlet communicating with the flexible oil pipe body is formed at the center of the flange structure, and a sealing ring is provided between the flange structure and the generator housing.

7. The maintenance method for the generator lubrication oil pipe tower of a semi-direct drive wind turbine generator set according to claim 6, characterized in that, The outer surface of the soft oil pipe is provided with a stainless steel woven protective mesh.

8. The maintenance method for the generator lubrication oil pipe tower of a semi-direct drive wind turbine generator set according to claim 5, characterized in that, The first connector includes a first connecting section for connecting to a threaded hole and a second connecting section for connecting to a 90° joint. The outer diameter of the first connecting section is smaller than the outer diameter of the second connecting section, and an internal thread for connecting to a 90° joint is machined at the center of the second connecting section. An external thread for connecting to a threaded hole is machined on the outer surface of the first connecting section, and the axial length of the external thread is consistent with the axial length of the threaded hole.

9. The maintenance method for the generator lubrication oil pipe tower of a semi-direct drive wind turbine generator set according to claim 5, characterized in that, The protective pad is 0.5 mm thick and consists of multiple thin copper sheets stacked on top of each other.

10. The maintenance method for the generator lubrication oil pipe tower of a semi-direct drive wind turbine generator set according to claim 5, characterized in that, In step S2.6, adhesive is applied in advance to the surface of the first connector to form a sealing layer to prevent oil leakage.

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