Traction fan system for rack rail vehicle

Abstract

The utility model discloses a traction fan system for a rack rail vehicle, which belongs to the field of rail transit equipment and comprises a mesh enclosure, a base and two fans, the two fans are symmetrically arranged in the base, the mesh enclosure is arranged at the top of the base, a sound-absorbing cellular board is arranged on the inner wall of the base, and the outer wall of the base is sequentially coated with sound-absorbing cotton and deadening felt from inside to outside. The fan is of a multi-layer sound insulation structure and comprises a sound absorption cellular board arranged in the machine base and sound absorption cotton and sound insulation felt arranged outside the machine base, and noise of a fan system is remarkably reduced while normal operation of the fan is not affected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of rail transit equipment, and specifically relates to a traction fan system for rack railway vehicle. BACKGROUND

[0002] The rack train is a new type of train researched and developed in China in recent years, adopts a "wheel rail + rack rail" double mode traction mode, and is mainly applied to large gradient terrains. The first rack train in China runs in the Dujiangyan to Siguniang Mountain area, and is required to adapt to the harsh environment with many mountains, steep slopes and much wind and sand. The fan for locomotive and motor vehicle is mainly used for railway locomotive ventilation cooling and the like, and the fan is a key component in the locomotive ventilation cooling system, and the rack train has higher requirements for the fan system.

[0003] The traction fan system is a main cooling component of the traction motor, and is related to the safe and stable operation of the whole vehicle. The cooling system is installed on the top mounting frame of the rail vehicle, cooling air enters the inner cavity of the cooling system from the mesh cover, the symmetrical double fans respectively suck air from the air inlet, the impeller is pressurized after work, and is discharged from the fan outlet, so as to achieve the effect of cooling the traction motor. However, according to the existing fan structure, it is difficult to meet the requirements of high efficiency operation and noise reduction of the rack train. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a traction fan system for rack railway vehicle to solve the problems in the prior art.

[0005] A traction fan system for rack railway vehicle is provided, which comprises:

[0006] The mesh cover, the base and the two fans are symmetrically arranged in the base, the mesh cover is arranged on the top of the base, the inner wall of the base is provided with sound-absorbing honeycomb panels, and the outer wall of the base is sequentially covered with sound-absorbing cotton and soundproof felt from inside to outside.

[0007] Further, the fan comprises an air inlet, an impeller, a volute and a motor, the air inlet and the motor are arranged at two ends of the volute respectively, the impeller is arranged in the interior of the volute and is fixedly connected with the output shaft of the motor, and the blades of the impeller are of a multi-wing arc structure.

[0008] Further, the bottom of the base is provided with a plurality of drainage openings.

[0009] Further, the top of the mesh cover is provided with an observation window.

[0010] Compared with the prior art, the utility model has the advantages of:

[0011] The fan adopts a multi-layer sound insulation structure, including the sound absorption honeycomb plate inside the base and the sound absorption cotton and sound insulation felt outside the base, which significantly reduces the noise of the fan system without affecting the normal operation of the fan. BRIEF DESCRIPTION OF DRAWINGS

[0012] For the convenience of those skilled in the art to understand, the utility model will be further described below in conjunction with the drawings.

[0013] Figure 1 It is a kind of rack car whole structure schematic diagram for traction fan system;

[0014] Figure 2 It is the structure schematic diagram of centrifugal fan provided in the embodiment of the utility model;

[0015] Figure 3 It is the top view of base provided in the embodiment of the utility model.

[0016] In the drawing: 1, mesh cover;11, observation window;2, base;21, drain port;3, centrifugal fan;31, air inlet;32, impeller;33, volute;34, motor;4, sound absorption honeycomb plate;5, sound absorption cotton;6, sound insulation felt. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be further described in detail in conjunction with the drawings and examples.The specific embodiments described herein are intended to explain the utility model only, and are not intended to limit the utility model, that is, the described embodiments are only a part of the embodiments of the utility model, not all embodiments.The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] Please refer to Figure 1 As shown in the drawings, the utility model embodiment is a kind of traction fan system for rack car, including mesh cover 1, base 2 and two centrifugal fans 3, two centrifugal fans 3 are symmetrically arranged in base 2, mesh cover 1 is set to the top of base 2, the inner wall of base 2 is provided with sound absorption honeycomb plate 4, and the outer wall of base 2 is covered with sound absorption cotton 5 and sound insulation felt 6 from inside to outside in sequence.

[0020] The fan system adopts a box type structure, the base 2 forms a lower cavity, the mesh cover 1 forms an upper cavity, and two symmetrical centrifugal forward centrifugal fans 3 are arranged in the cavity. The base 2 is welded by a bottom plate, a side plate and a mounting plate, and is made of high-strength aluminum alloy, which greatly reduces the weight of the cooling system under the premise of ensuring the installation strength. The base 2 is the main load-bearing component of the fan and blocks the noise of the fan from spreading outward. The mesh cover 1 is welded by high-strength carbon steel and can effectively adapt to the harsh environment with impact and frequent vibration. The mesh holes are uniformly arranged, which is convenient for air suction and blocking the noise of the fan in the cavity from spreading outward, and can filter leaves, branches and large particles. An observation window 11 is arranged at the top of the mesh cover 1, which is convenient for maintenance and repair.

[0021] As shown in Figure 1 and Figure 3 , a plurality of drainage ports 21 are arranged at the bottom of the base 2 and arranged at both ends of the base 2. The excess moisture entering the cavity through the mesh cover 1 is discharged through the drainage ports 21. The drainage ports 21 are covered by a filter screen, which can filter leaves to prevent the drainage ports 21 from being blocked.

[0022] The sound-absorbing honeycomb plate 4 is a plate made of two thin panels firmly bonded on both sides of a layer of thick honeycomb core material, also known as a honeycomb sandwich structure, which has a significant sound-absorbing effect.

[0023] The sound-absorbing cotton 5 is a porous high polymer material structure. The sound-absorbing cotton 5 is fixed on the outside of the base with adhesive. An aluminum foil tape is attached to the outer surface of the sound-absorbing cotton 5. The sound-absorbing cotton 5 has a large noise reduction amplitude for the fan noise.

[0024] The soundproof felt 6 is a high-density flexible coiled material made of rubber and high polymer material as the main raw material, which can cover the sound-absorbing cotton 5 inside and has obvious soundproof effect.

[0025] As shown in Figure 2 , the centrifugal fan 3 includes an air inlet channel 31, an impeller 32, a volute 33 and a motor 34. The air inlet channel 31 and the motor 34 are arranged at both ends of the volute 33, and the impeller 32 is arranged inside the volute 33 and fixedly connected with the output shaft of the motor 34. The motor 34 drives the impeller 32 to rotate, and the external air is sucked from the air inlet channel 31 to the inside of the volute 33 and then transported to the traction motor for cooling.

[0026] The blades of the impeller 32 are of a multi-wing arc structure, which has the characteristics of stable flow velocity and low noise. The volute 33 is of a spiral structure. The layout of the air inlet channel 31, the impeller 32 and the volute 33 on the fan is reasonable and compact. The axial and radial clearances between the air inlet channel 31 and the impeller 32 are both 4mm, which can reduce the eddy current near the air inlet channel 31 and the impeller 32.

[0027] The fan has the following parameters: the rotation number is 2900 rpm, the flow rate is 20 m / min, the static pressure is 2300 Pa, the power is less than or equal to 2.4 kW, the A-weighted sound power is less than or equal to 93 dB(A), the multiple-blade centrifugal fan A-weighted sound level is 16, the multiple-blade centrifugal fan A-weighted sound level according to the standard JB / T 8690-2014 is 22-24, the multiple-blade centrifugal fan A-weighted sound level is less than or equal to 6 dB higher than the similar multiple-blade centrifugal fan, the fan noise reduction technology and noise indicators fully meet the requirements, and the efficiency reaches 58%, which is at a high level among the similar multiple-blade centrifugal fans.

[0028] The above is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as the modifications or supplements or replacements do not deviate from the structure of the utility model or exceed the range defined by the present claim, which shall belong to the protection scope of the utility model.

Claims

1. A rack-and-pinion railway traction fan system, characterized by, Include: The net cover (1), base (2) and two centrifugal fan (3), two said centrifugal fan (3) is arranged in base (2) symmetry, the net cover (1) is set in the top of base (2), the inner wall of base (2) is provided with sound-absorbing honeycomb board (4), the outer wall of base (2) is covered with sound-absorbing cotton (5) and sound insulation felt (6) from inside to outside.

2. A traction fan system for a rack railway vehicle according to claim 1, characterized in that The centrifugal fan (3) includes air inlet (31), impeller (32), volute (33) and motor (34), the air inlet (31) and motor (34) are arranged at both ends of volute (33) respectively, the impeller (32) is arranged in the inside of volute (33) and is fixedly connected with the output shaft of motor (34), the blade of impeller (32) is multi-wing arc structure.

3. A rack-and-pinion vehicle traction fan system as defined in claim 1, wherein The bottom of base (2) is provided with several drainage openings (21).

4. A rack-and-pinion vehicle traction fan system as defined in claim 1, wherein The top of net cover (1) is provided with observation window (11).

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