Processing tool and clamping method of intelligent variable-speed high-power double-fed fan lubricating end cover

Abstract

This invention discloses a machining fixture and clamping method for a lubrication end cover of an intelligent variable-speed high-power doubly-fed wind turbine, belonging to the field of wind power equipment machining technology. The machining fixture includes a base plate, a pair of upright plates, a support plate, a mounting ring, a pressure block, and a push rod. The pair of upright plates are fixed to the base plate and located on both sides of the bushing. The support plate is supported at both ends by the top of the upright plates. The mounting ring is positioned between the support plate and the flange. The pressure block is positioned on the support plate to press the flange. The push rod is positioned on the base plate to abut against and fix the U-shaped rib. The clamping method includes: limiting the fit between the mounting ring and the support plate; radial and axial positioning of the lubrication end cover and the mounting ring; calibration of the height difference and flatness between the two points using a dial indicator; pressing down with the pressure block; and locking the push rod against the surface. This invention improves the machining accuracy and clamping efficiency of the lubrication end cover through multi-point positioning and reference calibration, solving the problems of inconsistent positioning references and difficulty in guaranteeing geometric tolerances in the prior art.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment processing technology, and more specifically, to a processing fixture and clamping method for a lubrication end cover of a doubly fed wind turbine. Background Technology

[0002] As one of the mainstream models of wind power generation, the lubrication system of doubly-fed induction generators is crucial to the reliable operation of the entire unit. The lubrication end cap, as a key component of the wind turbine bearing lubrication system, is responsible for sealing and distributing the lubricating medium; its machining precision directly affects the lubrication effect and the wind turbine's lifespan.

[0003] In existing technology, lubrication end caps typically include a flange and a bushing connected to one side of the flange, with U-shaped ribs provided on the outer circumference of the bushing. The following technical problems exist when precision machining this type of end cap:

[0004] 1. Inconsistent positioning datum: Traditional clamping methods lack a systematic positioning datum design, requiring repeated alignment during processing, resulting in low efficiency;

[0005] 2. Difficulty in ensuring geometric tolerances: It is difficult to simultaneously meet the requirements of high-power fans for multiple precision indicators such as the perpendicularity, concentricity, position, and cylindricity of the end caps;

[0006] 3. Unscientific clamping method: Traditional clamping methods do not fully consider the coordinated control of multi-point correction and reference surface, which can easily introduce clamping deformation or positioning error;

[0007] 4. Lack of standardized processes: The processing quality varies greatly among different operators, making it difficult to achieve consistent production.

[0008] To address the aforementioned issues, there is an urgent need to develop a dedicated machining fixture and clamping method to improve the machining accuracy and production efficiency of lubrication end caps. Summary of the Invention

[0009] The present invention aims to solve the above-mentioned problems existing in the prior art and provide a machining fixture and clamping method for a fan lubrication end cover.

[0010] To achieve the above objectives, the present invention provides a machining fixture for a fan lubrication end cover, used for clamping the lubrication end cover. The lubrication end cover includes a flange and a bushing connected to one side of the flange. A U-shaped rib is provided on the outer circumference of the bushing. The fixture is characterized by comprising:

[0011] substrate;

[0012] A pair of upright plates are fixedly mounted on the base plate and located on both sides of the bushing, respectively;

[0013] The support plate, with its two ends respectively supported on the top of the pair of upright plates, is used to support the lubrication end cap;

[0014] An mounting ring is disposed between the support plate and the flange, and the lubrication end cap is supported on the mounting ring;

[0015] A pressure block, disposed on the support plate, is used to press the flange from the top and bottom;

[0016] A top rod is provided on the base plate and is used to abut against and fix the U-shaped rib from both sides.

[0017] Furthermore, the upright plate has a window facing the top rod, which allows the operator to adjust the top rod through the window.

[0018] Furthermore, the push rod is adjustablely mounted on the mounting block, which is fixedly mounted on the base plate. By adjusting the extension length of the push rod, it can accommodate U-shaped ribs of different sizes.

[0019] Furthermore, the mounting block has an inverted "T" shape, and its two ends are fastened to the substrate with screws to ensure the connection stability between the mounting block and the substrate.

[0020] Furthermore, a gap is provided between the end of the bushing away from the flange and the base plate to avoid contact between the end of the bushing and the base plate, which could cause positioning interference or damage.

[0021] Furthermore, the inner hole of the mounting ring is matched with the outer circle of the bushing for radial positioning of the lubrication end cap.

[0022] Furthermore, a recessed step is provided between the mounting ring and the flange to axially support the flange.

[0023] Furthermore, a step is provided between the mounting ring and the support plate for limiting the fit, which is used to radially position the mounting ring.

[0024] The present invention also provides a method for clamping a lubrication end cap using the above-mentioned machining fixture, comprising the following steps:

[0025] Step 1: Place the mounting ring on the support plate and ensure that the limiting steps between the mounting ring and the support plate cooperate with each other;

[0026] Step 2: Place the lubrication end cap on the mounting ring, so that the outer circle of the bushing matches the inner hole of the mounting ring to achieve radial positioning, and at the same time support the flange on the recessed step of the mounting ring.

[0027] Step 3: Use a dial indicator to confirm that the height difference between the two points on the upper surface of the flange protruding from the platform near the side is ≤1mm, and use a dial indicator to confirm that the flatness of the lower surface of the flange is ≤0.03mm;

[0028] Step 4: Press the flange from above using pressure blocks to achieve vertical positioning.

[0029] Step 5: Adjust the top rod to abut against the U-shaped rib from both sides and lock the top rod to achieve circumferential and horizontal positioning and fixation.

[0030] Furthermore, in step five, the top rod is adjusted through the window opened on the upright plate.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. High positioning accuracy: The mounting ring achieves dual positioning of the bushing and flange, and the push rod provides lateral support to the U-shaped rib, forming multi-point and multi-directional positioning constraints to ensure the stability of the end cover's posture during processing.

[0033] 2. High clamping efficiency: The combination structure of support plate and mounting ring enables rapid positioning and clamping, reducing alignment time and improving production efficiency;

[0034] 3. Unified calibration benchmark: By using a dial indicator to correct the height difference and flatness between two points, the uniformity of the machining benchmark is ensured, laying the foundation for subsequent precision machining;

[0035] 4. Stable processing quality: The tooling structure is reasonably designed and easy to operate, ensuring consistent processing quality for different operators;

[0036] 5. High adaptability: The adjustable design of the push rod and the replaceability of the mounting ring enable this tooling to be adapted to lubrication end caps of different specifications. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the first three-dimensional structure of the lubrication end cap provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the second three-dimensional structure of the lubrication end cap provided in an embodiment of the present invention;

[0039] Figure 3 This is a front view of the lubrication end cap provided in an embodiment of the present invention;

[0040] Figure 4 for Figure 3 Schematic diagram of the BB cross-section structure;

[0041] Figure 5 This is a three-dimensional structural diagram of the machining tooling provided in an embodiment of the present invention;

[0042] Figure 6 This is a front view schematic diagram of the machining tooling provided in an embodiment of the present invention;

[0043] Figure 7 This is a top view of the machining fixture provided in an embodiment of the present invention;

[0044] Figure 8 for Figure 7 Schematic diagram of CC cross-section structure;

[0045] Figure 9 for Figure 7 Schematic diagram of the DD cross-sectional structure;

[0046] Figure 10 This is a front view schematic diagram of the mounting ring provided in an embodiment of the present invention;

[0047] Figure 11 for Figure 10 A schematic diagram of the AA cross-sectional structure.

[0048] In the figure: 1. Lubrication end cap; 11. Flange; 12. Bushing; 13. U-shaped rib; 2. Base plate; 21. Top rod; 22. Mounting block; 3. Vertical plate; 31. Window; 4. Mounting ring; 41. Recessed step; 5. Support plate; 51. Pressure block. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0050] Example 1: Machining tooling structure

[0051] like Figures 5 to 11 As shown, this embodiment provides a machining fixture for a fan lubrication end cover, used to clamp the lubrication end cover 1.

[0052] like Figures 1 to 4 As shown, the lubrication end cover 1 includes a flange 11 and a bushing 12 connected to one side of the flange 11. A U-shaped rib 13 is provided on the outer circle of the bushing 12.

[0053] The processing fixture includes a base plate 2, a pair of upright plates 3, a support plate 5, a mounting ring 4, a pressure block 51, and a top rod 21.

[0054] The base plate 2 is a flat plate structure and is fixedly installed on the worktable of the processing equipment. A pair of upright plates 3 are fixedly set on the base plate 2 and are located on both sides of the bushing 12. The upright plates 3 are provided with windows 31, which are positioned directly opposite the top rod 21, so that the operator can adjust the top rod 21 through the windows 31.

[0055] The two ends of the support plate 5 are respectively supported on the top of a pair of upright plates 3. The support plate 5 is used to support the lubrication end cover 1. The mounting ring 4 is disposed between the support plate 5 and the flange 11, and the lubrication end cover 1 is supported on the mounting ring 4.

[0056] Specifically, a step with a limiting fit is provided between the mounting ring 4 and the support plate 5 for radial positioning of the mounting ring 4. The inner hole of the mounting ring 4 has a limiting fit with the outer circle of the bushing 12 for radial positioning of the lubrication end cover 1. A recessed step 41 is provided between the mounting ring 4 and the flange 11 for axial support of the flange 11.

[0057] The pressure block 51 is disposed on the support plate 5 and is used to press the flange 11 from top to bottom. The push rod 21 is disposed on the base plate 2 and is used to abut against and fix the U-shaped rib 13 from both sides.

[0058] Furthermore, the push rod 21 is adjustablely mounted on the mounting block 22, which is fixedly mounted on the base plate 2. The mounting block 22 has an inverted "T" shape, and its two ends are fastened to the base plate 2 with screws to ensure a stable connection. By adjusting the extension length of the push rod 21, it can accommodate U-shaped ribs 13 of different sizes, enhancing the versatility of the tooling.

[0059] A gap is provided between the end of the bushing 12 away from the flange 11 and the base plate 2 to avoid contact between the end of the bushing 12 and the base plate 2, which would cause positioning interference or damage.

[0060] Example 2: Clamping Method

[0061] like Figures 5-9 As shown, this embodiment provides a method for clamping a lubrication end cap using the above-described machining fixture, including the following steps:

[0062] Step 1: Place the mounting ring 4 on the support plate 5 and make the limiting steps between the mounting ring 4 and the support plate 5 cooperate to ensure that the radial position of the mounting ring 4 on the support plate 5 is fixed.

[0063] Step 2: Place the lubrication end cap 1 on the mounting ring 4, so that the outer circle of the bushing 12 fits with the inner hole of the mounting ring 4 to achieve radial positioning, and at the same time, support the flange 11 on the recessed step 41 of the mounting ring 4 to achieve axial positioning.

[0064] Step 3: Use a dial indicator to confirm that the height difference between the two points on the upper surface of the flange 11 of the lubrication end cover 1 that protrude from the platform near the side is ≤1mm, and use a dial indicator to confirm that the flatness of the lower bottom surface of the flange 11 is ≤0.03mm. This step ensures that the reference posture of the lubrication end cover 1 before processing meets the accuracy requirements through precise measurement and correction.

[0065] Step 4: Press the flange 11 from above using the pressure block 51, being careful to avoid the machined holes, to achieve vertical limiting. The clamping force of the pressure block 51 should be applied evenly to avoid causing clamping deformation.

[0066] Step 5: Adjust the top rod 21 to abut against the U-shaped rib 13 from both sides and lock the top rod 21 to achieve circumferential and horizontal positioning and fixation. When adjusting the top rod 21, the operator can operate through the window 31 opened on the upright plate 3, which is convenient and quick.

[0067] After completing the above clamping steps, the lubrication end cap 1 can be precision machined. During the machining process, the end cap posture is stable. The technical requirements of the finished product should meet the following: perpendicularity 0.05, concentricity 0.05, position 0.08, and cylindricity 0.02.

[0068] The machining fixture and clamping method for wind turbine lubrication end caps provided by this invention have a reasonable structural design and are easy to operate. They can significantly improve the machining accuracy and production efficiency of lubrication end caps and are applicable to the precision machining process of lubrication end caps for various wind power generation equipment, with good industrial applicability.

Claims

1. A machining fixture for a lubrication end cover of an intelligent variable speed high-power doubly-fed wind turbine, used for clamping a lubrication end cover (1), the lubrication end cover (1) comprising a flange (11) and a bushing (12) connected to one side of the flange (11), wherein the outer circle of the bushing (12) is provided with a U-shaped rib (13), characterized in that, include: substrate(2); A pair of upright plates (3) are fixedly disposed on the base plate (2) and respectively located on both sides of the bushing (12); The support plate (5) is supported at both ends on the top of the pair of upright plates (3) and is used to support the lubrication end cap (1). The mounting ring (4) is disposed between the support plate (5) and the flange (11), and the lubrication end cap (1) is supported on the mounting ring (4); A pressure block (51) is disposed on the support plate (5) for pressing the flange (11) from the top and bottom. A top rod (21) is disposed on the base plate (2) for abutting against and fixing the U-shaped rib (13) from both sides.

2. The machining fixture for the lubrication end cover of the intelligent variable speed high-power doubly-fed fan according to claim 1, characterized in that, The upright plate (3) has a window (31) facing the top rod (21).

3. The machining fixture for the lubrication end cover of the intelligent variable speed high-power doubly-fed fan according to claim 1, characterized in that, The top rod (21) is adjustablely mounted on the mounting block (22), which is fixedly mounted on the base plate (2).

4. The machining tool for the intelligent variable-speed high-power double-fed type fan lubricating end cover of claim 3, wherein, The mounting block (22) has an inverted "T" shape and its two ends are fastened to the base plate (2) by screws.

5. The machining tool for the intelligent variable-speed high-power double-fed type fan lubricating end cover of claim 1, wherein, A gap is provided between the end of the bushing (12) away from the flange (11) and the base plate (2).

6. The machining fixture for the lubrication end cover of the intelligent variable speed high-power doubly-fed fan according to claim 1, characterized in that, The inner hole of the mounting ring (4) is matched with the outer circle of the bushing (12) for radial positioning of the lubrication end cap (1).

7. The machining fixture for the lubrication end cover of the intelligent variable speed high-power doubly-fed fan according to claim 6, characterized in that, A recessed step (41) is provided between the mounting ring (4) and the flange (11) for axially supporting the flange (11).

8. The machining fixture for the lubrication end cover of the intelligent variable speed high-power doubly-fed fan according to claim 1, characterized in that, The mounting ring (4) and the support plate (5) are provided with a step for limiting the fit, which is used to radially position the mounting ring (4).

9. A method for clamping a lubricating end cap using the machining fixture described in any one of claims 1 to 8, characterized in that, Includes the following steps: Step 1: Place the mounting ring (4) on the support plate (5) and make the limiting steps between the mounting ring (4) and the support plate (5) cooperate with each other; Step 2: Place the lubrication end cap (1) on the mounting ring (4) so ​​that the outer circle of the bushing (12) matches the inner hole of the mounting ring (4) to achieve radial positioning, and at the same time, let the flange (11) be supported on the recessed step (41) of the mounting ring (4); Step 3: Use a dial indicator to confirm that the height difference between the two points on the upper surface of the flange (11) of the lubrication end cover (1) near the side of the protruding platform is ≤1mm, and use a dial indicator to confirm that the flatness of the bottom surface of the flange (11) is ≤0.03mm; Step 4: Press the flange (11) from above using the pressure block (51) to achieve vertical positioning; Step 5: Adjust the top rod (21) to abut against the U-shaped rib (13) from both sides and lock the top rod (21) to achieve circumferential and horizontal positioning and fixation.

10. The clamping method according to claim 9, characterized in that, In step four, the top rod (21) is adjusted through the window (31) on the upright plate (3).

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