Cleaning and oiling method for GE fan main shaft bearing

Abstract

The invention discloses a cleaning and oiling method for a GE fan main shaft bearing, which comprises the following steps: disassembling an oil leakage port cover plate on a fan main shaft through a sleeve to enable the main shaft to idle, and shoveling redundant grease through a shovel; installing an oil leakage port cover plate, filling a cleaning agent from an oil filling port, waiting for free rotation of the main shaft after the cleaning agent is added, then opening the oil leakage port to remove a mixture of grease and the cleaning agent, and circulating for at least five times; after the cover is opened, a cleaning agent is pumped through a pump to wash the bearing, and the front end of the main shaft is washed inwards from the retainer through a cleaning probe; air is blown to the end face of the main shaft bearing through an air pump, and sealing or oil injection is conducted after water of the cleaning agent volatilizes; a grease adding pump is used for adding grease to a bearing gap before capping, meanwhile, waste oil of the main shaft of the draught fan is weighed, new oil is added according to the leakage amount of the waste oil, and by means of the cleaning and oil adding method, cleanliness and lubrication of the main shaft bearing of the GE draught fan are guaranteed, the safety and operation efficiency of equipment are improved, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning main bearings of wind turbines, and in particular to a cleaning and oiling method for main shaft bearings of GE wind turbines. Background Art

[0002] With the continuous growth of global energy demand and the rapid development of renewable energy technology, wind energy has been widely used and promoted as a clean and sustainable form of energy. As the core equipment for wind energy conversion, the performance and reliability of wind turbines (referred to as "wind turbines") directly affect the economic and environmental benefits of wind farms. As an important part of the wind turbine, the main shaft of the wind turbine bears the key functions of transmitting torque and supporting the impeller. However, as the operation time of the wind turbine increases, iron shavings, dust, salt and other pollutants generated by wear and tear will accumulate inside the bearings, seriously affecting the quality of the grease, causing the grease to deteriorate and harden, and accelerating the damage of the bearings. By cleaning the old oil inside the bearings and refilling new grease, the quality and lubrication effect of the grease inside the bearings can be ensured, and the service life of the bearings can be extended.

[0003] The existing seal cleaning treatment method has the problem that the old grease is not cleaned thoroughly, and the inside of the bearing is still not clean after re-greasing. In addition, manual cleaning using tools such as water guns is not only inefficient and labor-intensive, but also has the problem of uneven cleaning in the seal. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention discloses a method for cleaning and oiling a main shaft bearing of a GE fan to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for cleaning and oiling a main shaft bearing of a GE fan, comprising the following steps:

[0006] Step 1: First, remove the oil leakage cover plate on the fan main shaft through the sleeve, let the main shaft idle, and use a shovel to scrape off excess grease during the rotation; install the oil leakage cover plate after the grease is cleaned;

[0007] Step 2: Protect the oil leakage port of the spindle with a film and a rag, then add 6-15L of cleaning agent from the oil filling port. After adding the cleaning agent, wait for the spindle to rotate freely, then open the oil leakage port to drain the grease and cleaning agent mixture into the oil collection bucket, and repeat this cycle at least five times;

[0008] Step 3: Open the cover for cleaning. Pump out the cleaning agent to flush the bearing. Use a cleaning probe to flush the front end of the spindle from the cage to the inside. Use an air pump to blow air to the end face of the spindle bearing to accelerate the volatilization of the residual cleaning agent in the cavity. After the water in the cleaning agent evaporates, seal the cover or inject oil.

[0009] Step 4: Cap and add oil. Use a grease pump to grease the bearing gap before capping. Perform the first maintenance after 360 hours of operation after capping. At the same time, weigh the waste oil on the fan main shaft and add new oil according to the amount of waste oil leakage.

[0010] Preferably, in step 2, the viscosity of the discharged waste grease and the color change of the cleaning agent are closely observed during the cleaning process. If the viscosity of the waste grease becomes higher or the color of the cleaning agent becomes turbid, the waste grease is emptied again and the solvent-based cleaning agent is injected until the discharged solvent-based cleaning agent becomes translucent.

[0011] Preferably, in step 3, the capping or oiling is performed after the water in the cleaning agent evaporates, and the roller is left to dry for 5-10 hours; and the roller is directly touched by hand to determine whether it contains water.

[0012] Preferably, in step 3, the opening step includes:

[0013] S1. Install the push rod bolts in the reserved holes at 3 o'clock and 9 o'clock on the outside of the spindle;

[0014] S2. Place the crowbar horizontally on the skylight, hang the hoist in the middle of the crowbar, and connect the hoist to the top rod bolt through the sling;

[0015] S3. Use a socket wrench to remove the outer ring bolts. After all the bolts are removed, push the push rod out, and then adjust the hoist to move the end cover out to the middle position of the main shaft to complete the cover opening operation.

[0016] Preferably, in step 4, the capping step includes:

[0017] S1. Remove the small end cover outside the large end cover of the main shaft, take out the sealing ring and put it on the main shaft, fix the sealing ring on the small end cover, and after the large end cover is installed, start to restore the sealing ring and the small end cover;

[0018] S2. Adjust the hand chain hoist to move the large end cover forward to the bearing, adjust the height, and slowly push it in manually;

[0019] S3. Install all the bolts manually, then tighten them with an electric wrench, and finally tighten them with a symmetrical torque wrench;

[0020] S4. Finally, clean and install the sealing ring, and restore the installation and fixation of the small end cover.

[0021] Preferably, in step 4, the filling standard includes: if the waste oil is less than 8kg, then 8kg of new oil is added; if the waste oil is greater than 8kg, then new oil equal to the weight of the waste oil is added.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, multiple cycles of cleaning are performed to ensure that the internal bearing surface of the main shaft is thoroughly cleaned, thereby reducing residual dirt, increasing the service life of the main shaft, improving the safety and operating efficiency of the equipment, and extending the service life of the equipment.

[0024] 2. In the present invention, by optimizing the cleaning process parameters and closely observing the viscosity of the discharged waste grease and the color change of the cleaning agent during the cleaning process, the cleaning effect can be judged, thereby achieving a more efficient, safe and environmentally friendly cleaning operation on the inner bearing surface of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] In the attached picture:

[0027] Figure 1 It is a partial structural schematic diagram of the main shaft of the fan of the present invention;

[0028] Figure 2 It is an exploded view of the main shaft structure of the fan of the present invention;

[0029] Numbers in the figure: 1, main shaft; 2, large end cover; 3, small end cover; 4, roller; 5, retaining frame. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] Example: Figure 1 and Figure 2 As shown, a method for cleaning and oiling the main shaft bearing of a GE fan specifically comprises the following steps:

[0032] 1.1 Material and tool preparation

[0033] Prepare materials in advance: Make sure all necessary cleaning agents, lubricants, protective materials (such as films, rags), tools (such as sockets, wrenches, shovels, hoists, slings, pumps, probes, etc.) are in place. See the following table:

[0034] Serial number name Specification quantity 1 Plum blossom opening 13 1 2 Plum blossom opening 18 1 3 Sleeve 13 1 4 Sleeve 18 1 5 Sleeve 36 1 7 Crowbar 60cm 1 8 gourd 2T 1 9 Push rod bolt M24 4 10 Hit wrench 36 1 11 Torque wrench 1000Nm 1 12 Suspenders 0.5T 2 13 High pressure cleaning pump 1 14 Air compressor pump 1 15 Industrial endoscope 1 16 ratchet One-half inch 1 17 Hanging bag 2 18 Lifting rope 12mm*10M 1 19 Grease pump Spindle oiling 1 20 Screwdriver Flathead screwdriver 1 21 wrench Adjustable wrench 1

[0035] Prepare tools on site: Check the status of all tools and ensure they are in good working order, especially power and hand tools, to avoid failures during operation.

[0036] 1.2Issuing on-site work tickets

[0037] Safety measures: Before issuing a work ticket, ensure that all safety measures are in place, including but not limited to on-site safety warning signs, the wearing of personal protective equipment (PPE), and the preparation of emergency plans.

[0038] 2. Open the oil leak to clean the oil

[0039] 2.1 Remove the oil leak cover

[0040] Use a #13 socket: Make sure the socket matches the bolt size to avoid damaging the threads.

[0041] Safe operation: During the disassembly process, be careful to prevent grease from splashing to avoid polluting the environment and hurting the operators.

[0042] 2.2 Spindle 1 idling oil removal

[0043] Idle operation: When the spindle 1 is idling, use a small shovel to gently scrape off excess grease to avoid excessive force that may damage the surface of the spindle 1.

[0044] Observe the state of grease: During the cleaning process, closely observe the state of grease. If any abnormality is found (such as color change, odor, etc.), stop the operation and check it in time.

[0045] 2.3 Install the oil leak cover

[0046] Reinstallation: After the grease is cleaned, reinstall the oil leak cover to ensure its sealing to prevent the newly injected cleaning agent from leaking out.

[0047] 3. Add cleaning agent from the oil filling port for cleaning (at least five times)

[0048] 3.1 Protective measures

[0049] Film and rag protection: Lay film and rag under the oil leakage port of main shaft 1 to prevent the cleaning agent from leaking into the tower and causing secondary pollution.

[0050] Check the protection effect: After laying the protective material, conduct an inspection to ensure that the protection measures are effective.

[0051] 3.2 Add cleaning agent

[0052] Add appropriate amount: According to the size and degree of dirt of the spindle 1, add appropriate amount of cleaning agent, generally 6-15L.

[0053] Even distribution: Ensure that the cleaning agent is evenly distributed on the surface of the spindle 1 to achieve the best cleaning effect.

[0054] 3.3 Spindle 1 free rotation

[0055] Wait for 30 minutes: Allow the spindle 1 to rotate freely under the action of the cleaning agent, so that the cleaning agent can fully penetrate into every corner to dissolve and loosen the dirt.

[0056] 3.4 Exclusion of mixtures

[0057] Open the oil leakage port: After the spindle 1 stops rotating, open the oil leakage port and drain the mixture of grease and cleaning agent into the oil collecting bucket.

[0058] Check the state of the mixture: During the elimination process, observe the state of the mixture. If a large amount of grease is still not cleaned, the cleaning time can be appropriately extended.

[0059] 3.5 Circulation cleaning

[0060] Repeat steps 3.2-3.4 at least five times to ensure that the surface of the roller 4 inside the spindle 1 is thoroughly cleaned.

[0061] Observe the cleaning effect: After each cycle, observe the viscosity of the discharged waste grease and the color change of the cleaning agent. If the viscosity of the waste grease is high or the color of the cleaning agent is turbid, it is necessary to empty it again and inject new solvent-based cleaning agent until the discharged cleaning agent becomes translucent.

[0062] 4. Dismantle the ladder and accessories near the main shaft 1

[0063] 4.1 Disassembly of ladder

[0064] Use 13 sleeve: When disassembling the ladder, pay attention to keep the ladder stable to avoid injury caused by ladder collapse.

[0065] Secure the ladder: Secure the disassembled ladder in front of the gearbox locking plate to ensure that it cannot move.

[0066] 4.2 Remove the exhaust pipe

[0067] Use an adjustable wrench: When removing the main shaft 1 exhaust pipe, be careful to prevent the grease remaining in the pipe from splashing out.

[0068] Safe Storage: Store the removed exhaust pipe safely to avoid damage.

[0069] 5. Open the lid

[0070] 5.1 Install the top bolt

[0071] Positioning reserved holes: Install push rod bolts in the reserved holes at 3 o'clock and 9 o'clock to ensure their accurate positioning.

[0072] Secure the crowbar: Lay the crowbar across the skylight to ensure it is stable.

[0073] 5.2 Installing the Hoist

[0074] Attach the hoist: Hang the hoist in the middle of the crowbar and connect it to the ram bolts with the slings, making sure it is secure.

[0075] 5.3 Remove the outer ring bolts

[0076] Use a 36 socket wrench: gradually remove the outer ring bolts, paying attention to maintaining the integrity of the bolts and avoiding damage.

[0077] Eject the end cover: After all bolts are removed, use the ejector to slowly eject the end cover and move it to the middle position of spindle 1 by adjusting the hoist.

[0078] 6. Open the lid for cleaning

[0079] 6.1 Pumping cleaning agent

[0080] Flushing the bearings: Use a cleaning agent pump to flush the bearings, especially the front end of the spindle 1, and use a cleaning probe to flush from the cage 5 inward to ensure that the inside of the bearing is thoroughly cleaned.

[0081] Observe the cleaning effect: During the rinsing process, observe the color change of the cleaning agent. If you find that there is still dirt that has not been removed, you can appropriately extend the rinsing time.

[0082] 7. Air Dry

[0083] 7.1 Stand and dry

[0084] Wait for the water to evaporate: After rinsing with the cleaning agent, let it stand for 5-10 hours and wait for the water in the cleaning agent to evaporate.

[0085] Check the drying status: Touch roller 4 with your hand to confirm that there is no moisture left before proceeding to the next step.

[0086] Accelerate drying: If necessary, use an air pump to blow air toward the end face of the spindle 1 bearing to speed up the volatilization of the residual cleaning agent in the cavity.

[0087] 8. Capping

[0088] 8.1 Fat Liquor

[0089] Use a grease pump: Before capping, use a grease pump to grease the bearing gap to ensure that the bearing is fully lubricated.

[0090] 8.2 Removal of small end cover 3

[0091] Take out the sealing ring: remove the small end cover 3 outside the large end cover 2, take out the sealing ring and place it on the main shaft 1 to ensure the integrity of the sealing ring.

[0092] 8.3 Install the large end cover 2

[0093] Adjust the position: adjust the hand chain hoist to move the large end cover 2 forward to the bearing, and adjust the height to ensure its accurate position.

[0094] Push in slowly: Push the large end cover 2 slowly by hand into the bearing, and avoid tightening it with bolts.

[0095] 8.4 Fastening bolts

[0096] Manual installation: First install all bolts manually, then use an electric wrench for preliminary tightening.

[0097] Symmetrical tightening: Finally, use a symmetrical torque wrench to tighten to ensure that the bolts are evenly stressed. The tightening torque is 850Nm.

[0098] 8.5 Clean the sealing ring

[0099] Cleaning and installation: Clean the sealing ring to ensure that there is no impurity on its surface, and then install it to ensure the sealing effect.

[0100] 8.6 Restore small end cap 3

[0101] Install as required in step 8.4: Reinstall the small end cover 3, ensuring that it fits tightly with the large end cover 2 to avoid oil leakage.

[0102] IX. Installation accessories and ladders

[0103] 9.1 Reinstall the exhaust pipe

[0104] Reinstall: Reinstall the removed exhaust pipe onto the main shaft 1, ensuring that it is positioned correctly and sealed well.

[0105] 9.2 Restore the installation ladder

[0106] Re-secure: Re-secure the dismantled ladder to its original position to ensure its stability and safety.

[0107] 10. Oiling

[0108] 10.1 Filling lubricating oil

[0109] Fill with 24 kg: After all cleaning and installation work is completed, add 24 kg of lubricating oil to ensure that the spindle 1 is fully lubricated.

[0110] First maintenance: After 360 hours of operation, the first maintenance is carried out. The waste oil of the fan main shaft 1 is weighed and new oil is added according to the amount of waste oil leakage. The filling standard is: if the waste oil is less than 8kg, 8kg of new oil is added; if the waste oil is greater than 8kg, new oil equal to the weight of the waste oil is added.

[0111] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for cleaning and oiling the main shaft bearing of a GE fan. It is characterized in that The following steps are involved: Step 1: First, remove the oil leakage cover plate on the fan main shaft through the sleeve, let the main shaft idle, and use a shovel to scrape off excess grease during the rotation; install the oil leakage cover plate after the grease is cleaned; Step 2: Protect the oil leakage port of the spindle with a film and a rag, then add 6-15L of cleaning agent from the oil filling port. After adding the cleaning agent, wait for the spindle to rotate freely, then open the oil leakage port to drain the grease and cleaning agent mixture into the oil collection bucket, and repeat this cycle at least five times; Step 3: Open the cover for cleaning. Pump out the cleaning agent to flush the bearing. Use a cleaning probe to flush the front end of the spindle from the cage to the inside. Use an air pump to blow air to the end face of the spindle bearing to accelerate the volatilization of the residual cleaning agent in the cavity. After the water in the cleaning agent evaporates, seal the cover or inject oil. Step 4: Cap and add oil. Use a grease pump to grease the bearing gap before capping. Perform the first maintenance after 360 hours of operation after capping. At the same time, weigh the waste oil on the fan main shaft and add new oil according to the amount of waste oil leakage.

2. A method for cleaning and oiling a GE fan main shaft bearing according to claim 1, Features: In step 2, the viscosity of the discharged waste grease and the color change of the cleaning agent are closely observed during the cleaning process. If the viscosity of the waste grease becomes higher or the color of the cleaning agent becomes turbid, the waste grease is emptied again and the solvent-based cleaning agent is injected until the discharged solvent-based cleaning agent becomes translucent.

3. A method for cleaning and oiling a main shaft bearing of a GE fan according to claim 1, Features: In step 3, the capping or oiling is performed after the water in the cleaning agent evaporates, and the roller is left to dry for 5-10 hours; the roller is directly touched by hand to determine whether it contains water.

4. A method for cleaning and oiling a main shaft bearing of a GE fan according to claim 1, Features: In step 3, the opening step includes: S1. Install the push rod bolts in the reserved holes at 3 o'clock and 9 o'clock on the outside of the spindle; S2. Place the crowbar horizontally on the skylight, hang the hoist in the middle of the crowbar, and connect the hoist to the top rod bolt through the sling; S3. Use a socket wrench to remove the outer ring bolts. After all the bolts are removed, push the push rod out, and then adjust the hoist to move the end cover out to the middle position of the main shaft to complete the cover opening operation.

5. A method for cleaning and oiling the main shaft bearing of a GE fan according to claim 4, Features: In step 4, the capping step includes: S1. Remove the small end cover outside the large end cover of the main shaft, take out the sealing ring and put it on the main shaft, fix the sealing ring on the small end cover, and after the large end cover is installed, start to restore the sealing ring and the small end cover; S2. Adjust the hand chain hoist to move the large end cover forward to the bearing, adjust the height, and slowly push it in manually; S3. Install all the bolts manually, then tighten them with an electric wrench, and finally tighten them with a symmetrical torque wrench; S4. Finally, clean and install the sealing ring, and restore the installation and fixation of the small end cover.

6. A method for cleaning and oiling a main shaft bearing of a GE fan according to claim 1, Features: In step 4, the filling standard includes: if the waste oil is less than 8kg, then 8kg of new oil is added; if the waste oil is greater than 8kg, then new oil equal to the weight of the waste oil is added.

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