A detachable impeller main shaft

Abstract

The utility model relates to fan transmission component technical field, and disclose a detachable impeller main shaft, including main shaft and impeller, the impeller is sleeved in the main shaft, the shaft head side surface of main shaft is equipped with at least one oil hole near the cooperation surface of impeller and main shaft, the oil hole diameter is 3 5mm, for when disassembling make oil pass through and deliver pressure to the hole between impeller and main shaft, to realize the separation of impeller and main shaft, the utility model discloses a mode of setting up oil hole in the shaft head side surface of main shaft and using hydraulic oil pump to inject oil, can guarantee the mechanical integrity under the condition, significantly improve the disassembly efficiency of impeller and main shaft. Compared with traditional screw ejection mode, hydraulic force is stronger, is not influenced by high friction or rust condition too much, effectively solve the problem of difficult disassembly.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine transmission components, specifically a detachable impeller main shaft. Background Technology

[0002] In the field of wind turbine transmission components, the impeller and main shaft are the main components. Historically, early wind turbine designs focused on achieving basic functions, with less consideration given to the connection and disassembly of the impeller and main shaft. With industrial development, the requirements for wind turbine performance and ease of maintenance have gradually increased, making the reliability and disassembly of the impeller-main shaft connection an important research direction.

[0003] Currently, ensuring a tight axial and radial fixation between the impeller and the main shaft is a common design requirement. However, when it is necessary to remove the impeller, the tight fixation significantly increases the difficulty of disassembly. Traditional screw-out methods rely on manual rotation, which has limited thrust. Under conditions of high friction or corrosion, this method is difficult to use effectively. Furthermore, the small diameter of the impeller guide cone makes it impossible to machine large-sized screw holes, limiting tensile force and often resulting in situations where disassembly is impossible. This seriously affects the maintenance efficiency and cost of the fan and also poses a potential threat to the safety of operators. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a detachable impeller main shaft, which has the advantages of easy disassembly of the impeller and main shaft, improved operating efficiency and safety, and solves the problem of difficult disassembly of the impeller and main shaft in existing technologies.

[0005] To achieve the goals of convenient disassembly of the impeller and main shaft, and improved operational efficiency and safety, this utility model provides the following technical solution: a detachable impeller main shaft, comprising a main shaft and an impeller, wherein the impeller is sleeved on the main shaft, and at least one oil hole is provided on the side of the main shaft head near the mating surface between the impeller and the main shaft, wherein the oil hole has a diameter of 3-5mm, for allowing oil to pass through and transmit pressure between the impeller inner hole and the main shaft during disassembly, so as to achieve separation of the impeller and the main shaft.

[0006] Preferably, it also includes a guide cone, which is installed at the front end of the impeller.

[0007] Preferably, the spindle head has a bolt groove.

[0008] Preferably, the bolt groove is provided with connecting bolts for connecting the main shaft and the impeller.

[0009] Preferably, the impeller and the connecting bolt are fixedly connected by a lock nut.

[0010] Preferably, the oil hole passes through the bolt groove, forming an oil transfer channel.

[0011] Preferably, the diameter of the oil hole is 4 mm.

[0012] Compared with the prior art, the present invention provides a detachable impeller spindle, which has the following advantages: 1. This detachable impeller spindle, by setting an oil hole on the side of the spindle head and injecting oil using a hydraulic pump, significantly improves the disassembly efficiency of the impeller and spindle while ensuring the integrity of the machinery. Compared with the traditional screw-out method, the hydraulic force is stronger and less affected by high friction or corrosion, effectively solving the problem of difficult disassembly. During operation, no large external force needs to be applied manually, reducing the labor intensity of operators and improving operational safety, while also reducing the risk of accidents caused by difficult disassembly. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the impeller main shaft structure of this utility model.

[0014] In the diagram: 1. Main shaft; 2. Impeller; 3. Guide cone; 4. Locking nut; 5. Connecting bolt; 6. Oil hole; 7. Bolt groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1As shown, a detachable impeller 2 and main shaft 1 include a main shaft 1 and an impeller 2. The impeller 2 is sleeved on the main shaft 1. An oil hole 6 with a diameter of 4mm is provided on the side of the shaft head of the main shaft 1 near the mating surface between the impeller 2 and the main shaft 1. This oil hole 6 is used to allow oil to pass through and transmit pressure between the inner hole of the impeller 2 and the main shaft 1 during disassembly, thereby achieving separation of the impeller 2 from the main shaft 1. When it is necessary to disassemble the impeller 2, the guide cone 3, the locking nut 4, and the impeller 2 connecting bolt 5 are first removed. Oil is then injected from the original installation position of the impeller 2 connecting bolt 5 using a hydraulic oil pump. The oil pressure is transmitted through the oil hole 6 to the space between the inner hole of the impeller 2 and the main shaft 1, expanding the inner hole of the impeller 2 and creating a separable gap between the impeller 2 and the main shaft 1, thus achieving separation. With the help of the hydraulic oil pump pressure and the pressure transmission through the oil hole 6, the limited manual thrust is replaced, easily dealing with high friction and corrosion scenarios, significantly shortening the disassembly time of the impeller 2 and improving maintenance efficiency. It avoids damage to components such as the impeller 2 and the main shaft 1 by violent disassembly, and completes disassembly while ensuring the integrity of the mechanical structure, reducing maintenance safety risks. The 4mm diameter oil hole 6 is adapted to the small space structure of the impeller 2 guide cone 3, without relying on large-sized screw holes to provide pulling force, cleverly solving the disassembly problem caused by structural limitations.

[0017] like Figure 1 As shown, it also includes a guide cone 3, which is installed at the front end of the impeller 2; it allows the airflow to enter the impeller 2 evenly, avoids excessively fast or slow local airflow velocity, optimizes the airflow field around the impeller 2, improves the overall operating efficiency and stability of the equipment, makes the impeller 2 more uniformly stressed, and reduces abnormal vibration; it can also form a shielding and protection for the main shaft 1, connecting bolts 5, nuts and other components behind or around the impeller 2, preventing the working medium (such as corrosive or impurity-containing airflow or fluid) from directly contacting these components, preventing them from being corroded or worn, and reducing the risk of abnormal operation of the impeller 2 due to component damage.

[0018] like Figure 1 As shown, the main shaft 1 has a bolt groove 7 at its shaft head; a connecting bolt 5 for connecting the main shaft 1 and the impeller 2 is provided in the bolt groove 7; the impeller 2 and the connecting bolt 5 are fixedly connected by a lock nut 4; the bolt groove 7 provides installation space for the connecting bolt 5 between the main shaft 1 and the impeller 2, and by opening the bolt groove 7 at the shaft head, the connecting bolt 5 can be accurately embedded into the main shaft 1, ensuring the relative position stability of the bolt and the main shaft 1, and providing basic structural support for the subsequent assembly of the impeller 2; it also provides an "operation interface" for the subsequent disassembly of the impeller 2, and its removability (screwing in / screwing out) is a key link in the assembly and disassembly process of the impeller 2 - during installation, the impeller 2 is fixed by tightening the connecting bolt 5; during disassembly, the bolt is removed first to disconnect the direct mechanical connection between the main shaft 1 and the impeller 2, creating conditions for operations such as oil injection and separation through the oil hole 6.

[0019] like Figure 1As shown, the oil hole 6 passes through the bolt groove 7, forming an oil transfer channel. By utilizing the existing space of the bolt groove 7, the oil hole 6 is connected to it, eliminating the need for additional complex oil passages. This ingeniously constructs a convenient oil transfer path from the oil inlet to the mating surface of the impeller 2 and the main shaft 1. When disassembling the impeller 2, the oil can directly act on the contact area between the two through this channel, quickly expanding the inner hole of the impeller 2, achieving efficient separation, and significantly improving disassembly efficiency.

[0020] Working principle: When disassembling impeller 2, first remove the guide cone 3, lock nut 4, and impeller 2 connecting bolt 5 in sequence. Then, connect the hydraulic pump to the mounting bolt 5 and slowly start the hydraulic pump, gradually increasing the oil pressure. Oil enters the gap between the impeller 2's inner bore and the shaft through oil hole 6. As the oil pressure increases, the impeller 2's inner bore expands under the oil pressure, creating a gap with the shaft until the impeller 2 separates from the shaft. After disassembly, turn off the hydraulic pump and clean the components.

[0021] In summary, this detachable impeller 2 and main shaft 1, relying on the pressure of a hydraulic pump to replace the limited thrust of manually rotating screws, can easily cope with high friction, corrosion, and other conditions, quickly creating a gap and separating the inner hole of the impeller 2 from the main shaft 1, significantly shortening the disassembly time; it avoids damage to components such as the impeller 2 and main shaft 1 due to violent disassembly (such as forcibly tightening small-sized screws), completing disassembly while ensuring the integrity of the mechanical structure, reducing safety risks during operation and maintenance; it does not rely on large-sized screw holes in the impeller 2 guide cone 3 to provide tensile force, cleverly solving the disassembly problem caused by the small diameter of the guide cone 3 through hydraulic action, and is compatible with the existing structural characteristics of the impeller 2 and main shaft 1.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable impeller main shaft, comprising a main shaft and an impeller, wherein the impeller is sleeved on the main shaft, characterized in that: At least one oil hole with a diameter of 3-5 mm is provided on the side of the main shaft head near the mating surface between the impeller and the main shaft. The oil hole is used to allow oil to pass through and transmit pressure between the impeller inner hole and the main shaft during disassembly, so as to achieve separation of the impeller and the main shaft.

2. The detachable impeller main shaft according to claim 1, characterized in that: It also includes a guide cone, which is installed at the front end of the impeller.

3. The detachable impeller spindle according to claim 1, characterized in that: The spindle head has a bolt groove.

4. A detachable impeller main shaft according to claim 3, characterized in that: The bolt groove is provided with connecting bolts for connecting the main shaft and the impeller.

5. A detachable impeller main shaft according to claim 4, characterized in that: The impeller and the connecting bolt are fixedly connected by a lock nut.

6. A detachable impeller main shaft according to claim 1, characterized in that: The oil hole passes through the bolt groove, forming an oil transfer channel.

7. A detachable impeller spindle according to claim 1 or 6, characterized in that: The diameter of the oil hole is 4 mm.

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