Silent diesel generator built-in cooling fan mounting structure

Abstract

The utility model discloses a kind of built-in heat dissipation fan mounting structure of mute diesel generator, including generator set stator and rotor assembly, the main shaft one end of rotor assembly is equipped with flange plate, the central hole of main shaft is equipped in the flange plate, the rotor bolt is placed in the central hole, the both ends of rotor bolt are equipped with screw thread, the rotor bolt outside of the flange plate side is equipped with fan mounting disc, the fan mounting disc includes shaft tube and connecting disc, and the connecting disc is equipped with fan impeller.The screw thread of the rotor bolt one end is matched in the internal thread of the shaft tube, the screw thread of the rotor bolt other end is equipped with lock nut, and adjusting elastic pad is equipped between the end of the shaft tube and the flange plate end surface.The utility model ensures that fan impeller fixed on fan mounting disc does not loosen when rotating for a long time, so that the kinetic energy of generator rotor can be fully utilized to drive fan impeller rotation to dissipate heat for generator set, and reduce overall cost.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and in particular to a mounting structure for a built-in cooling fan in a silent diesel generator. Background Technology

[0002] To achieve optimal quiet operation, silent diesel generators are typically enclosed in a well-sealed hood. However, this can lead to increased temperatures inside the hood, necessitating cooling measures. Current technology usually involves installing an external cooling fan near the generator set to enhance airflow and dissipate heat.

[0003] Using an external cooling fan requires a significant amount of internal space within the generator housing. Furthermore, an external cooling fan necessitates a casing, a separate drive motor, and individual control, resulting in high overall costs. In contrast, the conventional structure of directly mounting the fan impeller onto the motor shaft is relatively simple, but the fan impeller is prone to loosening after use, making it unsuitable for direct installation on the main body of a silent diesel generator. Utility Model Content

[0004] To address the aforementioned problems, the present invention aims to provide a mounting structure for a built-in cooling fan in a silent diesel generator. By improving the existing generator rotor shaft structure, the fan impeller can be stably and reliably mounted via a connecting plate, thereby fully utilizing the kinetic energy of the generator rotor to drive the fan impeller to rotate and dissipate heat from the generator set.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The silent diesel generator has a built-in cooling fan mounting structure, including a generator stator and a rotor assembly. One end of the main shaft of the rotor assembly is provided with a flange. The flange has a central hole that passes through the main shaft. A rotor bolt passes through the central hole. Both ends of the rotor bolt are provided with threads. A fan mounting plate is provided outside the rotor bolt on the flange side. The fan mounting plate includes a shaft tube and a connecting plate. A fan impeller is provided on the connecting plate.

[0006] Furthermore, the shaft tube is provided with an internal thread that mates with the thread at one end of the rotor bolt, and a locking nut is provided on the thread at the other end of the rotor bolt. An adjusting spring washer is provided between the end of the shaft tube and the end face of the flange.

[0007] Furthermore, the connecting plate is provided with a threaded hole, and the threaded hole is provided with a connecting bolt to fix the fan impeller on the connecting plate.

[0008] Furthermore, the connecting disc is provided with an outwardly protruding hexagonal shaft head.

[0009] Furthermore, the fan impeller is provided with a mounting and positioning recess and a clearance hole, and the hexagonal shaft head protrudes from the clearance hole.

[0010] Furthermore, the fan impeller has at least four fan blades.

[0011] Furthermore, the main shaft is provided with support bearings at both ends.

[0012] This utility model has the following beneficial effects: 1. This utility model provides a flange on the main shaft of the rotor assembly and rotor bolts in the center hole of the main shaft to facilitate the secure installation of the fan mounting plate. This ensures that the fan impeller fixed on the fan mounting plate will not loosen during long-term rotation, thereby making full use of the kinetic energy of the generator rotor to drive the fan impeller to rotate and dissipate heat from the generator set, and reducing the overall cost.

[0013] 2. The fan mounting plate of this utility model is provided with a shaft tube and a connecting plate. The shaft tube has an internal thread that matches the thread on the rotor bolt. An adjusting spring washer is provided between the end of the shaft tube and the end face of the flange to ensure that the fan mounting plate is not easy to loosen after being locked on the rotor bolt. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the installation structure of the built-in cooling fan in the silent diesel generator of this utility model. Figure 2 This is a cross-sectional schematic diagram of the installation structure of the built-in cooling fan in the silent diesel generator of this utility model; Figure 3 This is a three-dimensional schematic diagram of the fan mounting plate of this utility model; Figure 4 This is a three-dimensional schematic diagram of the fan impeller of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Generator stator; 2. Rotor assembly; 20. Main shaft; 21. Flange; 22. Center hole; 3. Rotor bolt; 31. Thread; 4. Fan mounting plate; 41. Shaft tube; 42. Connecting plate; 43. Internal thread; 44. Threaded hole; 45. Hexagonal shaft head; 5. Fan impeller; 51. Mounting positioning recess; 52. Clearance hole; 6. Adjusting spring shim; 7. Connecting bolt. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: See Figure 1-4As shown, a silent diesel generator with a built-in cooling fan mounting structure includes a generator stator 1 and a rotor assembly 2. The rotor assembly 2 has support bearings at both ends of its main shaft 20. A flange 21 is located at one end of the main shaft 20, with a central hole 22 penetrating the main shaft 20. A rotor bolt 3 passes through the central hole 22, and threads 31 are provided at both ends of the rotor bolt 3. A fan mounting plate 4 is located outside the rotor bolt 3 on the flange 21 side. The threads 31 rotate in the opposite direction to the rotor rotation to prevent the fan mounting plate 4 from loosening. The fan mounting plate 4 includes a shaft tube 41 and a connecting plate 42, with a fan impeller 5 mounted on the connecting plate 42. An internal thread 43 in the shaft tube 41 engages with the threads 31 at one end of the rotor bolt 3. A locking nut is provided on the threads 31 at the other end of the rotor bolt 3. An adjusting spring washer 6 is provided between the end of the shaft tube 41 and the end face of the flange 21.

[0017] The connecting plate 42 has a threaded hole 44, and a connecting bolt 7 is provided in the threaded hole 44 to fix the fan impeller 5 to the connecting plate 42. The connecting plate 42 has an outwardly protruding hexagonal shaft head 45. The fan impeller 5 has a mounting positioning recess 51 and a clearance hole 52, and the hexagonal shaft head 45 protrudes from the clearance hole 52 to facilitate tightening the fan mounting plate 4 with a wrench. The fan impeller 5 has at least four fan blades and is integrally formed.

[0018] The above description is only a specific embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A silent diesel generator with a built-in cooling fan mounting structure, comprising a generator stator (1) and a rotor assembly (2), characterized in that: The rotor assembly (2) has a flange (21) at one end of the main shaft (20). The flange (21) has a central hole (22) that passes through the main shaft (20). A rotor bolt (3) is inserted in the central hole (22). The rotor bolt (3) has threads (31) at both ends. A fan mounting plate (4) is provided outside the rotor bolt (3) on the side of the flange (21). The fan mounting plate (4) includes a shaft tube (41) and a connecting plate (42). A fan impeller (5) is provided on the connecting plate (42).

2. The silent diesel generator built-in cooling fan mounting structure according to claim 1, characterized in that: The shaft tube (41) is provided with an internal thread (43) that mates with the thread (31) at one end of the rotor bolt (3). A locking nut is provided on the thread (31) at the other end of the rotor bolt (3). An adjusting spring washer (6) is provided between the end of the shaft tube (41) and the end face of the flange (21).

3. The silent diesel generator built-in cooling fan mounting structure according to claim 1 or 2, characterized in that: The connecting plate (42) is provided with a threaded hole (44), and the threaded hole (44) is provided with a connecting bolt (7) to fix the fan impeller (5) on the connecting plate (42).

4. The silent diesel generator built-in cooling fan installation structure according to claim 3, characterized in that: The connecting disc (42) is provided with an outwardly protruding hexagonal shaft head (45).

5. The silent diesel generator built-in cooling fan mounting structure according to claim 4, characterized in that: The fan impeller (5) is provided with a mounting positioning recess (51) and a clearance hole (52), and the hexagonal shaft head (45) passes through the clearance hole (52).

6. The silent diesel generator built-in cooling fan mounting structure according to claim 1, characterized in that: The fan impeller (5) has at least four blades.

7. The silent diesel generator built-in cooling fan mounting structure according to claim 1, characterized in that: The main shaft (20) is provided with support bearings at both ends.

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