A general tool for checking the sealing condition of a pipe shaft of a wind turbine gear box

Abstract

The utility model provides a kind of general tool for checking the sealing condition of wind power gear box pipe shaft, it is characterized by: left end of end connecting screw rod is connected together with cover nut by thread, and from left to right in turn through sealing pad, rubber column, then insert the pipe shaft inner hole of pipe shaft;More than two middle connecting screw rods in pipe shaft inner hole are connected together by connecting nut;Breather screw rod from left to right in turn through rubber column, sealing pad, and the right end of breather screw rod is connected together with breather nut by thread;The end of pipe shaft inner hole is abutted on the conical surface of rubber column;The opening of the blind hole of breather screw rod is right, and the blind hole is communicated with the threaded shaft hole of breather nut;The radial hole of breather screw rod is communicated with the pipe shaft inner hole of pipe shaft.The utility model carries out inspection to the sealing condition of pipe shaft when tool is in gear box maintenance, reduce the risk of gear box pipe shaft oil leakage during maintenance and reduce the cost of directly scrapping pipe shaft.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine gearbox tooling, specifically a general tooling for inspecting the sealing condition of wind turbine gearbox tube shafts. Background Technology

[0002] Due to its advantages such as being pollution-free and having low construction costs, wind power generation has experienced rapid development in recent years.

[0003] When designing wind turbines, cables and signal lines are often connected from the internal control cabinet of the wind turbine to the hub through the gearbox to control the blades and other components. However, these cables must not come into contact with the internal components or lubricating oil of the gearbox. The hollow tube shaft inside the wind turbine gearbox is designed to achieve this function. The gearbox is filled with lubricating oil, and the outer wall of the tube shaft forms a sealed structure with other gearbox components, sealing the lubricating oil inside the gearbox and preventing leakage. The inner bore of the tube shaft is open at both ends for cables and signal lines to pass through. Some tube shafts use welded structures or non-integral structures where segmented tube shafts are assembled using flanges, threads, etc. Non-integral tube shafts are prone to leakage due to poor processing or installation. Especially during gearbox maintenance, if a disassembled tube shaft is deformed or has tiny cracks, these are often invisible to the naked eye and difficult to inspect. If leakage occurs after use, the cost of repairing the leakage is high, often requiring replacement with a new one.

[0004] Therefore, for segmented tube shafts that are welded or mechanically connected, visual inspection is required. If no obvious damage is found, the shafts are either retained or scrapped entirely, resulting in high production costs for directly scrapped parts. Utility Model Content

[0005] This utility model provides a universal tooling for inspecting the sealing condition of the tube shaft of a wind turbine gearbox. Its purpose is to overcome the shortcomings of the prior art. By using the tooling to inspect the sealing condition of the tube shaft during gearbox maintenance, the risk of oil leakage during gearbox tube shaft maintenance and the cost of directly scrapping the tube shaft can be reduced.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A general-purpose tooling for inspecting the sealing condition of the shaft of a wind turbine gearbox, characterized in that: The side of the rubber column is conical; The venting screw is provided with an axial blind hole and a radial hole communicating with the blind hole; The vent nut has a threaded shaft hole; The left end of the end connecting screw is connected to the cap nut by threads, and passes through the sealing gasket and rubber column from left to right, and then is inserted into the inner hole of the tube shaft; the small diameter end face of the rubber column is inserted into the inner hole of the tube shaft, and the end of the inner hole of the tube shaft abuts against the conical surface of the rubber column. There are two or more central connecting screws connected together by connecting nuts inside the inner hole of the tube shaft; The middle connecting screw on the left end is connected to the right end of the end connecting screw via a connecting nut; The middle connecting screw on the right end is connected to the left end of the venting screw via a connecting nut; The venting screw passes through the rubber column and the sealing gasket from left to right, and the right end of the venting screw is connected to the venting nut by threads; the small-diameter end face of the rubber column is inserted into the inner hole of the tube shaft, and the end of the inner hole of the tube shaft abuts against the conical surface of the rubber column. The blind hole of the vent screw faces right and is connected to the threaded shaft hole of the vent nut. The radial hole of the venting screw is connected to the inner hole of the tube shaft.

[0007] The vent nut has a stepped through hole consisting of a large-diameter threaded hole and a small-diameter threaded hole. The large-diameter threaded hole connects to the right end of the vent screw.

[0008] A pressure plate is provided between the sealing gasket and the rubber column through which the end connecting screw passes; a pressure plate is provided between the sealing gasket and the rubber column through which the venting screw passes.

[0009] An annular boss is provided on one end face of the pressure plate; the annular boss on the pressure plate is pressed into the end face of the rubber column.

[0010] The advantages of this utility model are: 1. Simple structure, easy to use, and wide range of applications; 2. It can effectively detect leakage in pipe shafts, preventing leaking pipe shafts from being used and causing oil leakage, thus increasing maintenance costs, and also preventing intact pipe shafts from being scrapped, thus increasing parts costs; 3. The bosses on the pressure plate are pressed into the rubber column after being subjected to force, making the seal more reliable; 4. The conical rubber column can be used for various pipes and shafts, has strong tooling versatility, and has a good sealing effect after deformation under stress; 5. The tooling can be lengthened using connecting bolts of various specifications to accommodate pipes and shafts of different lengths, making it highly versatile and reducing tooling costs. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a cross-sectional view of the pressure plate; Figure 3 This is a cross-sectional view of the rubber column; Figure 4This is a cross-sectional view of the venting screw; Figure 5 This is a cross-sectional view of the vent nut. Detailed Implementation

[0013] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort. To facilitate understanding of this utility model, a more detailed description of this utility model will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0014] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] This utility model provides a universal tooling for inspecting the sealing condition of the tube shaft of a wind turbine gearbox (such as...). Figure 1 (As shown) includes: cap nut 1, sealing gasket 2, pressure plate 3 (as shown) Figure 2 As shown), rubber column 4 (as shown) Figure 3 (as shown), end connecting screw 5, connecting nut 6, middle connecting screw 7, vent screw 8 (as shown) Figure 4 As shown), vent nut 9 (as shown) Figure 5 (As shown).

[0016] The pressure plate 3 is made of hard steel and other materials, which are not easily deformed. The two end faces are plane 301 and plane 303. A ring boss 304 is provided on plane 303. The shaft hole of the pressure plate 3 is a through hole 302. The pressure plate 3 is used for tooling to be pressed under force.

[0017] The rubber column 4 is made of rubber and is easily deformed under stress, thus sealing the contact surface. The tail end face is a flat surface 401, the shaft hole is a through hole 402, and the side surface is a conical surface 403. The rubber column 4 is used for tooling sealing.

[0018] The venting screw 8 is provided with an axial blind hole 801 and a radial hole 802 communicating with the blind hole 801.

[0019] The left end face of the vent nut 9 is a plane 901, and the vent nut 9 has a stepped through hole composed of a large-diameter threaded hole 902 and a small-diameter threaded hole 903.

[0020] The left end of the end connecting screw 5 is connected to the cap nut 1 by thread, and passes through the sealing gasket 2, pressure plate 3, and rubber column 4 from left to right (the small diameter end face of the rubber column 4 is inserted into the inner hole 101 of the tube shaft 100, and the end of the inner hole 101 of the tube shaft 100 abuts against the conical surface 403), and then is inserted into the inner hole 101 of the tube shaft 100.

[0021] Depending on the length of the tube shaft 100, various lengths or multiple central connecting screws 7 can be fitted inside the inner hole 101 of the tube shaft, and then the central connecting screws 7 are connected together by connecting nuts 6.

[0022] The middle connecting screw 7 at the left end is connected to the right end of the end connecting screw 5 via the connecting nut 6.

[0023] The middle connecting screw 7 at the right end is connected to the left end of the venting screw 8 via the connecting nut 6.

[0024] The venting screw 8 passes through the rubber column 4 (the small diameter end face of the rubber column 4 is inserted into the inner hole 101 of the tube shaft 100, and the end of the inner hole 101 of the tube shaft 100 abuts against the conical surface 403) from left to right, the pressure plate 3, and the sealing gasket 2, and the right end of the venting screw 8 is connected to the venting nut 9 by threads.

[0025] The blind hole 801 of the vent screw 8 opens to the right and is connected to the stepped through hole formed by the large-diameter threaded hole 902 and the small-diameter threaded hole 903 of the vent nut 9.

[0026] The radial hole 802 of the vent screw 8 is connected to the inner hole 101 of the tube shaft 100.

[0027] Tighten the cap nuts 1 and vent nuts 9 on both sides to compress the tooling.

[0028] After the tooling is subjected to force, one end of the cap nut 1 is sealed, and the plane of the other end presses the sealing gasket 2 between the pressure plate 3 and the plane 301 of the pressure plate 3, making the joint surface at this point a reliable seal. After being subjected to force, the annular boss 304 on the pressure plate 3 is pressed into the plane 401 on the rubber column 4, and the plane 303 is pressed tightly against the plane 401, making the joint surface at this point a reliable seal. After being subjected to force, the conical surface 403 of the rubber column 4 is pressed into the inner hole 101 of the tube shaft and deforms, making it a reliable seal with the inner hole 101 of the tube shaft. The conical surface 403 can be used for inner holes 101 of tube shafts of different diameters. The tooling on the other side of the tube shaft 100 is in the same manner as described above, sealing the right end of the tube shaft 100.

[0029] When checking whether the tube shaft 100 is leaking, the threaded hole 903 on the vent nut 9 is connected to an external air or water supply device, and air, water or other liquids can be injected through the threaded hole 903 on the vent nut 9 for testing.

[0030] For example, after connecting the air pump to the threaded hole 903, the air is inflated. The gas enters the blind hole 801 of the vent screw 8 through the stepped through hole formed by the large-diameter threaded hole 902 and the small-diameter threaded hole 903 of the vent nut 9, and then enters the inner hole 101 of the tube shaft 100 through the radial hole 802. After reaching a certain pressure, the pressurization is stopped and maintained for a period of time. If the pressure remains unchanged, it indicates that the tube shaft 100 is well sealed. If the pressure decreases, it indicates that there is a leakage in the tube shaft 100. Alternatively, the tube shaft 100 and the tooling as a whole are placed in water, and the presence and location of air bubbles are observed during inflation to confirm whether the tube shaft 100 is leaking and where the leak is located.

[0031] This utility model patent discloses a universal tooling for inspecting the sealing of wind turbine gearbox tube shafts. It features a simple structure, convenient operation, and reliable testing. The boss on the pressure plate presses into the plane of the rubber column under force, ensuring a more secure seal. The cap nut seals any gas or liquid leaking through the threaded gaps. The conical rubber column is suitable for various tube shafts. The tooling is highly versatile and provides excellent sealing after deformation under stress. The length of the tooling can be adjusted using connecting bolts of various specifications to accommodate tube shafts of different lengths, enhancing its versatility and reducing tooling costs.

[0032] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this 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 this invention. Therefore, this 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 universal tooling for inspecting the sealing condition of the shaft of a wind turbine gearbox, characterized in that: The rubber column has a conical side surface; the venting screw has an axial blind hole and a radial hole communicating with the blind hole; the venting nut has a threaded shaft hole; the left end of the end connecting screw is threadedly connected to the cap nut, and passes through the sealing gasket and the rubber column from left to right, before being inserted into the inner hole of the tube shaft; the small-diameter end face of the rubber column is inserted into the inner hole of the tube shaft, and the end of the inner hole of the tube shaft abuts against the conical surface of the rubber column; there are two or more central connecting screws connected together in the inner hole of the tube shaft by connecting nuts; the central connecting screw at the left end is connected by connecting nuts. The nut is connected to the right end of the end connecting screw; the middle connecting screw at the right end is connected to the left end of the venting screw via the connecting nut; the venting screw passes through the rubber column and the sealing gasket from left to right, and the right end of the venting screw is connected to the venting nut by threads; the small-diameter end face of the rubber column is inserted into the inner hole of the tube shaft, and the end of the inner hole of the tube shaft abuts against the conical surface of the rubber column; the blind hole of the venting screw faces right, and the blind hole communicates with the threaded shaft hole of the venting nut; the radial hole of the venting screw communicates with the inner hole of the tube shaft.

2. The universal tooling for inspecting the sealing condition of the wind turbine gearbox shaft as described in claim 1, characterized in that: The vent nut has a stepped through hole consisting of a large-diameter threaded hole and a small-diameter threaded hole. The large-diameter threaded hole connects to the right end of the vent screw.

3. The universal tooling for inspecting the sealing condition of the wind turbine gearbox shaft as described in claim 1, characterized in that: A pressure plate is provided between the sealing gasket and the rubber column through which the end connecting screw passes; a pressure plate is provided between the sealing gasket and the rubber column through which the venting screw passes.

4. A universal tooling for inspecting the sealing condition of a wind turbine gearbox shaft as described in claim 3, characterized in that: An annular boss is provided on one end face of the pressure plate; the annular boss on the pressure plate is pressed into the end face of the rubber column.

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