A sandblasting device for machining fan main shaft bearings

Abstract

This utility model relates to a sandblasting device for processing wind turbine main shaft bearings, specifically within the field of wind turbine main shaft processing technology. It includes an inlet pipe with a first opening and a second opening. An air supply pipe is securely installed at the first opening, and a sandblasting guide pipe is fixedly installed at the second opening. A transfer pipe is installed at the end of the inlet pipe, and the transfer pipe has a first inner cavity and a second inner cavity. A delivery pipe is fixedly installed at the end of the transfer pipe, communicating with the first inner cavity. An adjusting block is rotatably mounted at the end of the delivery pipe, and a sandblasting pipe is fixedly installed on the adjusting block. A tube plate is fixedly installed on the outside of the transfer pipe, and a water injection pipe is securely installed inside the tube plate. This utility model can increase the temperature of the sand powder during sandblasting, preventing low-temperature sand powder from weakening the plastic deformation effect on the surface of the wind turbine main shaft bearing, thus extending the bearing's rated life. Furthermore, it can effectively prevent condensation and moisture adsorption, reducing the risk of localized corrosion or hydrogen embrittlement, thereby improving the production quality of the wind turbine main shaft bearing.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine main shaft processing technology, and specifically discloses a sandblasting device for processing wind turbine main shaft bearings. Background Technology

[0002] In the precision manufacturing process of wind turbine main shaft bearings, sandblasting is a key surface pretreatment and strengthening process. This process uses precise control of high-speed abrasive flow to impact the bearing surface. On the one hand, it can efficiently remove oxide scale, rust, machining residues and oil stains from forging blanks or heat-treated parts, providing an absolutely clean and activated substrate for subsequent grinding, ultra-precision machining and surface coating, avoiding stress concentration or premature failure caused by impurities. On the other hand, the intense plastic deformation induced by sandblasting implants a high-amplitude residual compressive stress layer within tens to hundreds of micrometers of the bearing subsurface, and simultaneously refines the grains and increases the dislocation density, thereby significantly improving the bearing's contact fatigue life and load-bearing capacity.

[0003] Existing sandblasting equipment for wind turbine main shaft bearings produces low-temperature abrasive that weakens the plastic deformation of the main shaft surface, resulting in insufficient and uneven residual compressive stress implantation depth. This makes it difficult to effectively suppress fatigue crack initiation under alternating loads, directly reducing the bearing's rated life. Furthermore, the low-temperature abrasive exacerbates abrasive brittleness, easily generating excessive micro-fractures. This not only reduces sandblasting efficiency but may also cause sharp debris to scratch the bearing raceway or flange surface, forming stress concentration sources and accelerating wear and spalling. Additionally, the low surface temperature of the wind turbine main shaft bearing after sandblasting makes it prone to condensation and moisture adsorption, potentially leading to localized corrosion or hydrogen embrittlement, especially damaging to high-carbon chromium steel. Consequently, the production quality of the wind turbine main shaft bearings fails to meet production requirements. Utility Model Content

[0004] In view of the problem that the production quality of wind turbine main shaft bearings is poor due to the low temperature of the sand sprayed by the sandblasting equipment during the current wind turbine main shaft bearing processing, this utility model provides a sandblasting device for wind turbine main shaft bearing processing.

[0005] To solve the above problems, this utility model provides the following technical solution:

[0006] A sandblasting device for machining fan main shaft bearings includes an inlet pipe with a first opening and a second opening. An air supply pipe is securely installed at the first opening for introducing high-pressure, humid, and warm steam. A sandblasting guide pipe is fixedly installed at the second opening. A transfer pipe is installed at the end of the inlet pipe. The transfer pipe has a first inner cavity and a second inner cavity. The first inner cavity is connected to the sandblasting guide pipe, and the second inner cavity is connected to the air supply pipe. A delivery pipe is fixedly installed at the end of the transfer pipe and is connected to the first inner cavity. An adjusting block is rotatably mounted at the end of the delivery pipe, and a sandblasting pipe is fixedly installed on the adjusting block, connected to the delivery pipe. A tube sheet is fixedly installed on the outside of the transfer pipe, and a water injection pipe is securely installed inside the tube sheet.

[0007] Preferably, rubber sleeves are fixedly installed at the connection points of the first opening and the second opening with the air supply pipe and the sandblasting drainage pipe, respectively.

[0008] Preferably, a retainer is fixedly installed at the connection between the inlet pipe and the transfer pipe, and at the middle section of the transfer pipe. The retainer includes a first disc and a second disc, and the first disc and the second disc are fastened together by multiple long bolts.

[0009] Preferably, a regulating valve is installed in the middle section of the transfer pipe, and the regulating valve is used to control the flow rate of sand in the first inner cavity.

[0010] Preferably, a first infrared controller is fixedly mounted on the outside of the regulating valve.

[0011] Preferably, a U-shaped block is fixedly installed at the end of the conveying pipe, an active rotating rod is rotatably installed inside the U-shaped block, the adjusting block is tightly connected to the outer wall of the active rotating rod, and a second infrared controller is fixedly assembled on the outer side of the active rotating rod.

[0012] Preferably, the adjusting block has a groove, and a limiting rod is provided in the groove. The limiting rod is arranged parallel to the active rotating rod and both ends are fastened to the U-shaped block.

[0013] Preferably, the sandblasting pipe and the delivery pipe are connected by a flexible hose, and the pipe plate has multiple mounting grooves, with the outer wall of the water injection pipe being fastened to the inner wall of the mounting groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The sandblasting guide pipe of this invention introduces the sand used for sandblasting into the first inner cavity of the transfer pipe. A high-pressure, humidified steam is introduced into the second inner cavity of the transfer pipe via an air supply pipe. This high-pressure, humidified steam raises the suitable temperature of the sand, ensuring it reaches the optimal temperature range for sandblasting. The sand is then introduced into the sandblasting pipe via a delivery pipe. A first infrared controller controls the sand flow rate, and a second infrared controller controls the rotation angle of the active rotating rod, thereby adjusting the sandblasting angle to suit the sandblasting operation. A water injection function is also available via a water injection pipe. This invention can increase the temperature of the sand powder during sandblasting, preventing low-temperature sand powder from weakening the plastic deformation effect on the surface of the fan main shaft bearing, thus extending the bearing's rated life. Furthermore, it effectively prevents condensation and moisture adsorption, reducing the risk of localized corrosion or hydrogen embrittlement, thereby improving the production quality of the fan main shaft bearing. Therefore, it has a very broad application prospect. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the arrangement of the first and second openings of this utility model;

[0019] Figure 3 This is a schematic diagram of the installation structure of the air delivery pipe and sandblasting guide pipe of this utility model;

[0020] Figure 4 This is a schematic diagram of the arrangement of the first inner cavity and the second inner cavity of this utility model;

[0021] Figure 5 This is a schematic diagram of the installation structure of the adjusting block and U-shaped block of this utility model;

[0022] Figure 6 This is a schematic diagram of the sandblasting pipe installation structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the cage structure of this utility model;

[0024] In the diagram: 1. Inlet pipe, 2. First opening, 3. Second opening, 4. Air supply pipe, 5. Sandblasting drainage pipe, 6. Transfer pipe, 7. First inner cavity, 8. Second inner cavity, 9. Delivery pipe, 10. Adjusting block, 11. Sandblasting pipe, 12. Tube sheet, 13. Water injection pipe, 14. Rubber sleeve, 15. Cage, 1501. First disc, 1502. Second disc, 1503. Long rod bolt, 16. Adjusting valve, 17. First infrared controller, 18. U-shaped block, 19. Active rotating rod, 20. Second infrared controller, 21. Groove, 22. Limiting rod, 23. Mounting groove, 24. Flexible hose. Detailed Implementation

[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] This specific embodiment provides a sandblasting device for machining the main shaft bearing of a wind turbine, such as... Figures 1-7 As shown, the device includes an inlet pipe 1, which is a cylindrical structure with an internal cavity. The inlet pipe 1 has a first opening 2 and a second opening 3, which are symmetrically arranged on both sides of the inlet pipe 1. A rubber sleeve 14 is fixedly installed at both the first opening 2 and the second opening 3. The first opening 2 is tightly connected to the air supply pipe 4 through the rubber sleeve 14, and the second opening 3 is tightly connected to the sandblasting guide pipe 5 through the rubber sleeve 14. This improves the sealing of the connection between the first opening 2 and the second opening 3 by the rubber sleeve 14, thereby preventing the leakage of steam and sand.

[0027] The air supply pipe 4 is connected to an external steam input device, allowing the external steam input device to introduce high-pressure, humidified steam into the air supply pipe 4. The sandblasting drainage pipe 5 is connected to an external sand storage device, allowing the sand in the external sand storage device to be introduced into the sandblasting drainage pipe 5. A transfer pipe 6 is installed at the end of the inlet pipe 1. The transfer pipe 6 has a first inner cavity 7 and a second inner cavity 8 inside. The second inner cavity 8 is arranged around the outside of the first inner cavity 7. The first inner cavity 7 is connected to the sandblasting drainage pipe 5, allowing the surgical solution in the sandblasting drainage pipe 5 to enter the first inner cavity 7. The second inner cavity 8 is connected to the air supply pipe 4, allowing the high-pressure, humidified steam in the air supply pipe 4 to enter the second inner cavity 8, so that the high-pressure, humidified steam preheats the sand in the first inner cavity 7, bringing the sand in the first inner cavity 7 to the optimal temperature range of 50℃-65℃.

[0028] A retainer 15 is fixedly installed at the connection between the inlet pipe 1 and the transfer pipe 6, and at the middle section of the transfer pipe 6. There are two retainers 15 with the same structure. Each retainer 15 includes a first disc 1501 and a second disc 1502. The first disc 1501 and the second disc 1502 are fastened together by four long bolts 1503 and secured with nuts to ensure the stability of the connection between the first disc 1501 and the second disc 1502.

[0029] The intermediate section of the transfer pipe 6 has a regulating valve 16 installed inside the retainer 15. The regulating valve 16 can be a ball valve, and its internal ball structure can be used to control the flow rate of sand in the first inner cavity 7. Furthermore, a first infrared controller 17 is fixedly installed on the outside of the regulating valve 16. By setting the first infrared controller 17, the flow rate of sand in the transfer pipe 6 can be coordinated and controlled by an external central control medical device, thereby improving the coordinated operation capability of the sandblasting device.

[0030] A conveying pipe 9 is fixedly installed at the end of the transfer pipe 6. The conveying pipe 9 is connected to the first inner cavity 7, allowing sand in the first inner cavity 7 to enter the conveying pipe 9. A U-shaped block 18 is fixedly installed at the end of the conveying pipe 9, with the opening of the U-shaped block 18 facing outward. An active rotating rod 19 is rotatably installed inside the U-shaped block 18. A second infrared controller 20 is fixedly mounted on the outside of the active rotating rod 19, and the second infrared controller 20 can control the rotation of the active rotating rod 19 within the U-shaped block 18. An adjusting block 10 is fastened to the outer wall of the active rotating rod 19, and the adjusting block 10 is spaced apart from the U-shaped block 18. A sandblasting pipe 11 is fixedly installed on the outer end face of the adjusting block 10. The sandblasting pipe 11 is connected to the conveying pipe 9 through a flexible hose 24, so that the sand in the conveying pipe 9 enters the sandblasting pipe 11, and the sand used for sandblasting is sprayed into the sandblasting part of the fan main shaft bearing through the sandblasting pipe 11. By coordinating with the active rotating rod 19, the sandblasting angle of the sandblasting pipe 11 meets the operation requirements.

[0031] The adjusting block 10 has a groove 21 with its opening facing the sandblasting pipe 11. A limiting rod 22 is provided in the groove 21. The limiting rod 22 is arranged parallel to the active rotating rod 19 and both ends are fastened to the U-shaped block 18, thereby limiting the maximum turning angle of the adjusting block 10 and increasing the stability of the sandblasting device during sandblasting.

[0032] In addition, a tube sheet 12 is fixedly installed on the outside of the transfer pipe 6. Multiple installation slots 23 are provided on the tube sheet 12. A water injection pipe 13 can be fixedly installed in each installation slot 23, so that the water injection pipe 13 can continuously output water to the sandblasting part, avoid generating floating dust, and ensure that the working environment meets environmental protection requirements.

[0033] The working principle of this utility model is as follows: When the operator performs sandblasting, the sand material to be used for sandblasting is introduced into the first inner cavity 7 of the transfer pipe 6 through the sandblasting guide pipe 5, and at the same time, high-pressure humidified steam is introduced into the second inner cavity 8 of the transfer pipe 6 through the air supply pipe 4. The high-pressure humidified steam is used to raise the temperature of the sand material, thereby bringing it to the optimal temperature range of 50℃-65℃. The sand material in the first inner cavity 7 can enter the sandblasting pipe 11 through the conveying pipe 9, and the flow rate of the sand material is controlled by the first infrared controller 17, and the rotation angle of the active rotating rod 19 is controlled by the second infrared controller 20, thereby adjusting the sandblasting angle of the sandblasting pipe 11 to adapt to the operation requirements. At the same time, the water injection pipe 13 can continuously output water flow to the area around the sandblasting part of the blower main shaft bearing during sandblasting operation, so as to reduce the dust concentration around the sandblasting operation and ensure that the working environment meets environmental protection requirements.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sandblasting device for machining fan main shaft bearings, comprising an inlet pipe (1), characterized in that, The inlet pipe (1) has a first opening (2) and a second opening (3). A gas supply pipe (4) is fastened to the first opening (2) for introducing high-pressure humid steam. A sandblasting drainage pipe (5) is fixedly installed on the second opening (3). A transfer pipe (6) is installed at the end of the inlet pipe (1). The transfer pipe (6) has a first inner cavity (7) and a second inner cavity (8) inside. The first inner cavity (7) is connected to the sandblasting drainage pipe (5). The inner cavity (8) is connected to the air supply pipe (4). The end of the transfer pipe (6) is fixedly installed with a delivery pipe (9). The delivery pipe (9) is connected to the first inner cavity (7). The end of the delivery pipe (9) is rotatably provided with an adjustment block (10). A sandblasting pipe (11) is fixedly installed on the adjustment block (10). The sandblasting pipe (11) is connected to the delivery pipe (9). A tube sheet (12) is fixedly installed on the outside of the transfer pipe (6). A water injection pipe (13) is fastened inside the tube sheet (12).

2. A sand blasting device for processing a main shaft bearing of a fan according to claim 1, characterized in that, The first opening (2) and the second opening (3) are respectively connected to the air supply pipe (4) and the sandblasting drainage pipe (5) with rubber sleeves (14).

3. A sand blasting device for processing a main shaft bearing of a fan according to claim 1, characterized in that, A retainer (15) is fixedly installed at the connection between the inlet pipe (1) and the transfer pipe (6) and at the middle section of the transfer pipe (6). The retainer (15) includes a first disc (1501) and a second disc (1502). The first disc (1501) and the second disc (1502) are fastened together by multiple long bolts (1503).

4. A sand blasting device for processing a main shaft bearing of a fan according to claim 1, characterized in that, A regulating valve (16) is installed in the middle section of the transfer pipe (6), and the regulating valve (16) is used to control the flow rate of sand in the first inner cavity (7).

5. A sand blasting device for processing a main shaft bearing of a fan according to claim 4, characterized in that, The first infrared controller (17) is fixedly mounted on the outside of the regulating valve (16).

6. A sandblasting device for machining fan main shaft bearings according to claim 1, characterized in that, A U-shaped block (18) is fixedly installed at the end of the conveying pipe (9). An active rotating rod (19) is rotatably installed inside the U-shaped block (18). The adjusting block (10) is tightly connected to the outer wall of the active rotating rod (19). A second infrared controller (20) is fixedly assembled on the outer side of the active rotating rod (19).

7. A sandblasting device for processing a main shaft bearing of a fan according to claim 6, characterized in that The adjusting block (10) has a groove (21) inside, and a limiting rod (22) is provided in the groove (21). The limiting rod (22) is arranged in parallel with the active rotating rod (19) and both ends are fastened to the U-shaped block (18).

8. A sand blasting device for processing a main shaft bearing of a fan according to claim 1, characterized in that, The sandblasting pipe (11) and the delivery pipe (9) are connected by a flexible hose (24). The pipe plate (12) has multiple installation grooves (23). The outer wall of the water injection pipe (13) is fastened to the inner wall of the installation groove (23).

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