Portable fan blade angle adjustment tool

Abstract

The utility model provides a portable fan blade angle adjustment tool, and the tool includes cross -shaped tool main part which is constituted by two parallel base plates, the base plate is equipped with the strip -shaped through -hole of radial extension as screw rod one, screw rod two mounting position, four groups screw rod one, screw rod two respectively pass through the mounting position and connect the fan wheel hub and transmission disc, and the screw rod end forms adjustable limit structure through bolt. Through the synchronous adjustment of four groups of screw rods which are evenly distributed in the circumference, cooperate with the finishing plane of 0.05mm parallelism of tool main body, realize the accurate control of four point distance error of transmission disc less than or equal to 0.5mm. The tool significantly improves the blade angle adjustment precision, reduces the disassembly link of thrust disc, and improves the narrow space operation environment. Its structural optimization makes the fan assembly reliability improve, and has the operation convenience and economic benefit.

Description

Technical Field

[0001] This utility model relates to the field of mechanical maintenance tools, and in particular to a portable fan blade angle adjustment tool. Background Technology

[0002] Axial flow single-stage adjustable blade fan frequently experiences blade displacement during long-term operation. The fan's blade shaft and crank are connected by a clamp-type connection, lacking a key structure. Whenever blade recalibration is required, the crank fixing bolts must be loosened first, the blade angle adjusted to the appropriate position, and then re-fixed.

[0003] However, due to the unique structure of the wind turbine, the gap between the slider pressure plate and the hub is extremely narrow, making it difficult for conventional tools to reach inside and operate the fastening bolts. Currently, the only option is to remove the slider pressure plate before the crank bolts can be secured. This procedure has several drawbacks: First, the disassembly steps are cumbersome, and significant errors are easily introduced during blade angle adjustment, making it difficult to ensure accuracy and severely affecting assembly precision. Second, the additional disassembly work significantly increases the overall workload. In the already confined working environment, this increased workload quickly leads to worker fatigue, reducing work efficiency and negatively impacting the construction process.

[0004] Therefore, it is urgent to develop an effective solution through innovation and optimization. On the one hand, this will ensure the reliability of the assembly process and significantly improve assembly accuracy; on the other hand, it will improve the working environment and develop suitable tools to comprehensively enhance productivity and ultimately achieve a substantial increase in production efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a portable fan blade angle adjustment tool to solve the problems of existing tools being unable to adapt to narrow spaces, having low adjustment accuracy, and having cumbersome procedures.

[0006] This utility model is achieved using the following technical solution: a portable fan blade angle adjustment tool, characterized in that: it includes a tool body, which is composed of two parallel base plates; the tool body has a screw rod mounting position and a screw rod mounting position extending radially along the fan main shaft, both of which are strip-shaped through holes; screw rod 1 passes through screw rod 1 mounting position and one end of it is connected to the fan hub by a bolt, screw rod 2 passes through screw rod 2 mounting position and one end of it is connected to the transmission disc by a bolt; the other end of screw rod 1 and screw rod 2 are both provided with bolts for limiting their position.

[0007] A stable support frame is formed by the double base plate structure, and the strip-shaped through hole design allows the lead screw to move freely in the radial direction to adapt to wind turbine hubs of different sizes. The limit bolts cooperate with the lead screw to form a two-way fixing structure to ensure the stability of tool installation.

[0008] Furthermore, four lead screws are provided for both lead screw one and lead screw two, evenly distributed along the circumference of the tool body, with the lead screw two mounting position located inside the lead screw one mounting position. The symmetrical arrangement of the four sets of lead screws forms a four-point synchronous adjustment system. The hierarchical distribution of the inner lead screw two mounting position and the outer lead screw one mounting position realizes the functional zoning of hub fixing and transmission disc adjustment, effectively improving the force balance.

[0009] Furthermore, the tool body has a cross-shaped frame structure, with each of the four extension arms having a lead screw mounting position and a lead screw mounting position. The cross-shaped frame ensures structural strength while forming radial adjustment channels, and the symmetrical layout of the four extension arms corresponding to the wind turbine hub makes the tool's installation orientation more intuitive.

[0010] Furthermore, the two parallel base plates of the tool body are fixedly connected, and both planes of the base plates are precision-machined planes with a parallelism error between the two planes ≤0.05mm; the axial adjustment of the four lead screws ensures that the four-point distance error between the transmission disc and the tool body is ≤0.5mm. The precision-machined planes ensure that the tool body and the precision-machined surface of the fan hub fit tightly together, eliminating errors caused by assembly gaps, and the four-point distance error control keeps the transmission disc in a horizontal state during the lifting process, avoiding skewing and jamming.

[0011] Furthermore, the transmission disc is a structure consisting of two thrust discs pressing against a slider.

[0012] Furthermore, the length direction of the strip-shaped through holes at the second and first mounting positions of the lead screw is consistent with the radial direction of the main shaft of the fan. This design, where the direction of the through holes coincides with the radial direction of the main shaft, ensures that the movement trajectory of the lead screw is consistent with the direction of change in the hub diameter, achieving a linear adjustment function for diameter adaptation.

[0013] Furthermore, both lead screw one and lead screw two are configured in multiple sets, with a limiting bolt at the end of each set forming an abutment limiting structure with the base plate surface of the tool body. The coordinated action of the sets of lead screws forms a distributed support system, and the frictional force generated by the contact between the limiting bolt and the base plate surface effectively prevents the lead screw from rotating and loosening, ensuring the reliability of the position locking after adjustment.

[0014] The portable fan blade angle adjustment tool described in this utility model has the following advantages:

[0015] 1. Improved Assembly Precision: By adopting new specialized tools and optimized maintenance processes, the reliability of the assembly process was ensured, significantly improving assembly precision. This effectively avoided blade angle deviations caused by improper operation, guaranteeing stable operation and optimal performance of the wind turbine.

[0016] 2. Increased work efficiency: Taking the calibration of blower blade angles as an example, what used to take 3 people 3 days can now be completed by 4 people in just 1 day, significantly improving work efficiency. This not only saves labor costs but also shortens equipment downtime for maintenance, enhancing production continuity and overall efficiency.

[0017] 3. Improved working environment: The use of new tools reduces tedious disassembly work, improves the working environment for construction workers in confined spaces, reduces labor intensity and fatigue, and plays a positive role in improving construction techniques.

[0018] 4. Significant economic benefits: Although the improvement in technology is difficult to measure solely by profit indicators, the substantial increase in work efficiency and the enhancement of equipment stability, in the long run, save enterprises a great deal of human, material, and time costs, creating considerable economic and social benefits for the enterprise. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a portable fan blade angle adjustment tool;

[0021] Figure 2 A schematic diagram of the installation of a portable fan blade angle adjustment tool;

[0022] In the diagram, 1-tool body, 2-lead screw one, 3-lead screw two, 4-lead screw two mounting position, 5-lead screw one mounting position, 6-fan main shaft, 7-fan hub, 8-transmission disc. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example 1

[0025] like Figure 1-2 As shown, a portable fan blade angle adjustment tool includes a tool body 1, which includes two parallel base plates. The tool body 1 is provided with a lead screw second mounting position 4 and a lead screw first mounting position 5. Lead screw first 2 and lead screw second 3 pass through the corresponding mounting positions. Both the lead screw second mounting position 4 and the lead screw first mounting position 5 are slotted holes. The lead screw first 2 and lead screw second 3 can move in their respective mounting positions along the radial direction of the fan main shaft 6 to accommodate hubs of different models and diameters.

[0026] Multiple lead screws 2 and 3 are provided. One end of lead screw 2 is connected to the fan hub 7, and one end of lead screw 3 is connected to the transmission disc 8. Bolts are provided at the other ends of lead screw 2 and lead screw 3 to achieve limit positioning.

[0027] In use, first place the tool body 1 on the precision-machined surface of the fan hub, and fix the tool body 1 on the fan hub by the lead screw 2. Then connect the corresponding threaded holes of the transmission disc 8 by the lead screw 3. Adjust the position of the transmission disc 8 by adjusting the lead screw 3. Since there are multiple lead screws 3, the transmission disc can be pulled up evenly by multiple lead screws 3. The thread adjustment also plays a role in fixing the transmission disc, effectively improving the accuracy of the transmission disc adjustment. Example 2

[0028] This embodiment is a further optimization based on Embodiment 1, specifically:

[0029] The tool body 1 has a cross-shaped structure. There are four lead screws 1 2 and 2 3. The lead screw 2 mounting position 4 and lead screw 1 mounting position 5 are located on the four sides of the cross-shaped structure. The lead screw 2 mounting position 4 is located inside the lead screw 1 mounting position 5.

[0030] Both sides of the tool body 1 are precision machined surfaces, with parallelism controlled within 0.05mm. During the adjustment process, the distance from the blower transmission disc 8 to the tool body 1 is kept consistent at four points through four lead screws 3, with the error controlled within 0.5mm.

[0031] The transmission disc 8 is a structure in which two thrust discs press against the slider. The distance of the transmission disc 8 can be directly adjusted by the lead screw 3 without removing the thrust discs of the transmission disc 8.

[0032] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A portable fan blade angle adjustment tool, characterized in that: The tool body (1) is composed of two parallel base plates. The tool body (1) has a screw rod mounting position (4) and a screw rod mounting position (5) extending radially along the fan main shaft (6). Both the screw rod mounting position (5) and the screw rod mounting position (4) are strip-shaped through holes. The screw rod (2) passes through the screw rod mounting position (5) and one end of the screw rod is connected to the fan hub (7) by a bolt. The screw rod (3) passes through the screw rod mounting position (4) and one end of the screw rod is connected to the transmission disk (8) by a bolt. The other end of the screw rod (2) and the screw rod (3) are both provided with bolts for limiting the position.

2. The portable fan blade angle adjustment tool according to claim 1, characterized in that, There are four lead screws (2) and four lead screws (3) in total, which are evenly distributed around the tool body (1), and the mounting position (4) of lead screw 2 is located inside the mounting position (5) of lead screw 1.

3. The portable fan blade angle adjustment tool according to claim 2, characterized in that, The main body of the tool (1) has a cross-shaped frame structure, and each of the four extension arms has a lead screw mounting position (5) and a lead screw mounting position (4).

4. A portable fan blade angle adjustment tool according to claim 3, characterized in that, The two parallel base plates of the tool body (1) are fixedly connected. Both planes of the base plates are precision machined planes, and the parallelism error between the two planes is ≤0.05mm. The axial adjustment of the four lead screws (3) makes the four-point distance error between the transmission disc (8) and the tool body (1) ≤0.5mm.

5. A portable fan blade angle adjustment tool according to claim 1, characterized in that, The transmission disc (8) is a structure consisting of two thrust discs pressing against a slider.

6. A portable fan blade angle adjustment tool according to claim 1, characterized in that, The length direction of the strip-shaped through hole of the second screw mounting position (4) and the first screw mounting position (5) is consistent with the radial direction of the fan main shaft (6).

7. A portable fan blade angle adjustment tool according to claim 1, characterized in that, Both lead screw 1 (2) and lead screw 2 (3) are configured in multiple sets, and the limiting bolts at the end of each set of lead screws form an abutment limiting structure with the base plate surface of the tool body (1).

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