A rear end structure of a radial flow fan for rail transit passenger cars

Abstract

The invention discloses a rear end head structure of a radial flow fan for a rail transit passenger car. The invention comprises an aluminum alloy inner ring, wherein an aluminum alloy boss is respectively arranged on both sides of the front and rear of the middle part of the aluminum alloy inner ring, wherein a mounting groove is arranged beside one of the aluminum alloy bosses, and the mounting groove is arranged on the aluminum alloy inner ring; the aluminum alloy inner ring is sleeved with a rubber ring on one side of which the mounting groove is arranged; the rubber ring comprises a boss rubber ring sleeved on the aluminum alloy boss, a nested rubber ring arranged in the mounting groove, and a rubber outer ring sleeved on the aluminum alloy inner ring. The invention has the advantages of light weight, good vibration reduction effect, low noise and easy installation.

Description

Technical Field

[0001] The invention relates to the technical field of radial flow fan end structure, in particular to a rear end structure of a radial flow fan for a rail transit passenger car. Background Art

[0002] The radial flow fan is a ventilation device used in public transportation vehicles such as subways, trains, high-speed railways, and buses. Its purpose is to improve the air flow circulation in the vehicle and make the human body feel comfortable. The rear end head of the radial flow fan is an important component of the radial flow fan. The radial flow fan is connected to the rear end head through a fixed shaft. The quality and structural design of the rear end head are important factors affecting the working efficiency, noise, life and other key points of the radial flow fan. The existing rear end head structure of the radial flow fan is an aluminum alloy end body. The front and rear of the aluminum alloy end body are provided with bosses of the same diameter. The aluminum alloy end body and other structures of the rear end head are fixedly connected by bolts.

[0003] The noise reduction and light weight of the end structure of radial flow fans are currently important research and development methods for radial flow fans. The existing rear end structure of radial flow fans still has technical points for improvement and innovative breakthroughs. Summary of the invention

[0004] The purpose of the present invention is to provide a rear end head structure of a radial flow fan for a rail transit passenger car. The present invention has the advantages of being lightweight, having a good vibration reduction effect, being less likely to generate noise, and being easy to install.

[0005] The technical solution of the present invention is as follows: a rear end head structure of a radial flow fan for a rail transit passenger car, comprising an aluminum alloy inner ring, wherein an aluminum alloy boss is respectively arranged on the front and rear sides of the middle part of the aluminum alloy inner ring, wherein a mounting groove is arranged next to one of the aluminum alloy bosses, and the mounting groove is arranged on the aluminum alloy inner ring; the aluminum alloy inner ring is sleeved with a rubber ring on one side of which the mounting groove is arranged; the rubber ring comprises a boss rubber ring sleeved on the aluminum alloy boss, a nested rubber ring arranged in the mounting groove and a rubber outer ring sleeved on the aluminum alloy inner ring.

[0006] In the aforementioned rear end head structure of the radial flow fan for rail transit passenger vehicles, the rubber outer ring is connected to the nested protrusion; and the outer edge of the nested rubber ring is provided with a nested groove.

[0007] In the aforementioned rear end head structure of the radial flow fan for rail transit passenger cars, a threaded hole is provided on the aluminum alloy boss on the side of the aluminum alloy inner ring where no mounting groove is provided.

[0008] In the aforementioned rear end head structure of the radial flow fan for rail transit passenger vehicles, chamfers are provided on the outer edges of the boss rubber ring and the nested rubber ring.

[0009] In the aforementioned rear end head structure of the rail transit passenger car radial flow fan, a mounting hole is provided at the center of the aluminum alloy inner ring.

[0010] In the aforementioned rear end head structure of the radial flow fan for rail transit passenger vehicles, the boss rubber ring is arranged in the installation groove.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention has been subjected to material and structural tests and engineering topology optimization. Most of the rear end structure of the radial flow fan is made of rubber and a groove design is adopted to achieve the purpose of overall component weight reduction.

[0013] 2. Since the radial flow fan rotates at high speed for a long time during operation, it will generate lasting axial and longitudinal impact forces on its front and rear end head structures. The end head structure of the present invention uses a rubber ring structure. The design of the rubber structure can buffer the impact force, reduce the vibration of the fan, and thus reduce the noise.

[0014] 3. The rubber outer ring of the present invention can effectively avoid frictional heat generation and reduce heat transfer. At the same time, compared with aluminum alloy, the rubber ring can also reduce the transmission of fan vibration, reduce noise, and extend the overall life of the machine.

[0015] 4. The present invention overturns the traditional structure of bolt assembly of the rear end of the radial flow fan, and uses nested rubber rings and nested protrusions for installation, which is not only convenient and fast, but also can play the role of assembling and fixing the radial flow fan. The simple and fast installation method can also improve production efficiency and save the labor cost of the enterprise.

[0016] 5. The structure of the present invention has an aluminum alloy inner ring wrapped by a rubber ring. The structure of the present invention can be directly embedded in a radial flow fan, and is easy to install.

[0017] 6. The present invention designs an installation groove on the aluminum alloy inner ring. The design of the installation groove not only makes it convenient for workers to pinch the aluminum alloy inner ring boss with their fingers to install the rubber ring, but also reduces the weight of the entire component, making the rear end head structure of the present invention more lightweight.

[0018] 7. The present invention sets chamfers on the outer edges of the boss rubber ring and the nested rubber ring, so that the structure of the present invention can better cooperate with the fixed shaft of the radial flow fan, and can also prevent scratches and increase the aesthetic effect.

[0019] 8. The present invention sets a threaded hole on the aluminum alloy inner ring boss. The threaded hole plays the role of cooperating with the screw to fix the fixed shaft, which can prevent the fixed shaft connected to the radial flow fan of the structure of the present invention from loosening, thereby causing vibration and noise problems. The threaded hole designed in the present invention has a noise reduction effect.

[0020] 9. The structure of the present invention is generally assembled from a rubber ring and an aluminum alloy inner ring. Compared with the existing rear end head structure of a radial flow fan, the outer ring diameter of the existing rear end head structure can be greatly reduced, that is, the diameter of the rubber ring is reduced, so the structure of the present invention is more lightweight.

[0021] 10. When the fixed shaft collides with the aluminum alloy inner ring and generates vibration during use, the rubber outer ring can effectively buffer the vibration, thus realizing a low-noise radial flow fan. The rubber nesting groove can be well assembled with the radial flow fan, and the installation and removal are simple, which is convenient for repairing and maintaining the machine.

[0022] 11. Compared with the existing radial flow fan rear end material, the rubber structural material of the present invention has the advantages of reducing friction vibration, low noise, corrosion resistance and flame retardancy.

[0023] In summary, the present invention has the advantages of being lightweight, having good vibration reduction effect, being less likely to produce noise, and being easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the aluminum alloy inner ring;

[0026] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0027] Figure 4 It is a left-side structural schematic diagram of the present invention;

[0028] Figure 5 It is a front view structural schematic diagram of the present invention.

[0029] The markings in the attached drawings are: 1-aluminum alloy inner ring, 2-aluminum alloy boss, 3-mounting groove, 4-nested rubber ring, 5-boss rubber ring, 6-rubber outer ring, 7-nested protrusion, 8-threaded hole, 9-nested groove, 10-mounting hole. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0031] Embodiment. A rear end head structure of a radial flow fan for a rail transit passenger car, comprising: Figure 1-5As shown, it includes an aluminum alloy inner ring 1, and an aluminum alloy boss 2 is respectively provided on the front and rear sides of the middle part of the aluminum alloy inner ring 1, wherein a mounting groove 3 is provided next to one of the aluminum alloy bosses 2, and the mounting groove 3 is provided on the aluminum alloy inner ring 1; the aluminum alloy inner ring 1 is sleeved with a rubber ring on the side where the mounting groove 3 is provided; the rubber ring includes a boss rubber ring 5 sleeved on the aluminum alloy boss 2, a nested rubber ring 4 provided in the mounting groove 3, and a rubber outer ring 6 sleeved on the aluminum alloy inner ring 1. The boss rubber ring 5, the nested rubber ring 4 and the rubber outer ring 6 are integrally provided to form a rubber ring, and the rubber ring is sleeved on the side where the mounting groove 3 is provided on the aluminum alloy inner ring 1.

[0032] The rubber outer ring 6 is connected to the nested protrusion 7; the outer edge of the nested rubber ring 4 is provided with a nested groove 9. The nested protrusion 7 matches the nested groove 9 to achieve nested assembly. The nested protrusion 7 is also integrally arranged with the boss rubber ring 5, the nested rubber ring 4 and the rubber outer ring 6.

[0033] The aluminum alloy boss 2 on the side of the aluminum alloy inner ring 1 where the mounting groove 3 is not provided is provided with a threaded hole 8. The threaded hole 8 is provided on the aluminum alloy boss 2 where the rubber ring is not provided. Figure 4 As shown. The threaded hole 8 can be used with screws to fix the shaft, which can prevent the shaft connected to the radial flow fan from loosening, causing vibration and increasing noise. Therefore, the threaded hole 8 is a noise reduction design.

[0034] The outer edges of the boss rubber ring 5 and the nested rubber ring 4 are provided with chamfers. The chamfer design can prevent scratches to a certain extent, increase the aesthetics and reduce a certain quality.

[0035] The center of the aluminum alloy inner ring 1 is provided with a mounting hole 10. The mounting hole 10 is matched with the rotating shaft.

[0036] The boss rubber ring 5 is arranged in the installation groove 3 .

[0037] The method of using the structure of the present invention is the same as the method of using the rear end head of the existing radial flow fan. The present invention can be used to replace the existing rear end head structure of the radial flow fan in the radial flow fan. Specifically, one side of the nested rubber ring 4 is nested in the circular holes at both ends of the radial flow fan impeller, the shaft is connected through the mounting hole 10, and the screw is installed through the threaded hole 8 to fix the shaft.

[0038] The radial flow fan applicable to the present invention is a transverse impeller and the impeller longitudinal minor diameter parameter matches the radial flow fan of the present invention. The structural dimensions of the present invention can also be adjusted according to different radial flow fans with different impeller minor diameters, and the parameters can be matched with the impeller. The radial flow fan models applicable to the structure of the present invention include: double-axis FL-50A3, QK74-50-02-000-1, single-axis FL-50B3, QK74-50-02-000-2, QK80-50-02-000, etc.

Claims

1. A rear end head structure of a radial flow fan for a rail transit passenger car, characterized in that: The invention comprises an aluminum alloy inner ring (1), wherein an aluminum alloy boss (2) is respectively provided on the front and rear sides of the middle part of the aluminum alloy inner ring (1), wherein a mounting groove (3) is provided next to one of the aluminum alloy bosses (2), and the mounting groove (3) is provided on the aluminum alloy inner ring (1); the aluminum alloy inner ring (1) is sleeved with a rubber ring on one side of the aluminum alloy inner ring where the mounting groove (3) is provided; the rubber ring comprises a boss rubber ring (5) sleeved on the aluminum alloy boss (2), a nested rubber ring (4) provided in the mounting groove (3), and a rubber outer ring (6) sleeved on the aluminum alloy inner ring (1); The rubber outer ring (6) is connected to the nested protrusion (7); the outer edge of the nested rubber ring (4) is provided with a nested groove (9); A threaded hole (8) is provided on the aluminum alloy boss (2) on the side of the aluminum alloy inner ring (1) where the mounting groove (3) is not provided. The boss rubber ring (5) is arranged in the installation groove (3).

2. The rear end head structure of the radial flow fan for rail transit passenger cars according to claim 1 is characterized in that: The outer edges of the boss rubber ring (5) and the nested rubber ring (4) are provided with chamfers.

3. The rear end head structure of the radial flow fan for rail transit passenger cars according to claim 1, characterized in that: A mounting hole (10) is provided at the center of the aluminum alloy inner ring (1).

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