CN216518763U - Converter cooling fan for subway train traction platform - Google Patents

Abstract

The utility model discloses a cooling fan of a converter for a subway train traction platform, relates to the technical field of fluid machinery, and solves the problem of installation space of the cooling fan. The method comprises the following steps: an impeller; the air inlet duct is assembled and arranged on one side of the impeller; the driving motor is arranged in the air inlet duct assembly, and the output end of the driving motor is fixedly connected with the impeller; the support frame assembly is fixed on one surface, far away from the impeller, of the air inlet duct assembly, and is fixedly connected with the driving motor; the electric connector is provided with a wire in the junction box of the driving motor and extends to the outside of the junction box, the tail end of the electric connector is connected with the electric connector, the axial size of the fan is greatly shortened, the requirement on the size of the installation space of a novel train is met, and the original cooling performance is guaranteed.

Description

Converter cooling fan for subway train traction platform

Technical Field

The utility model belongs to the technical field of fluid machinery, and particularly relates to a cooling fan of a converter for a subway train traction platform.

Background

The main application of the cooling fan of the converter is on a traction system platform of an urban subway train. When the converter on the subway train works, a large amount of heat can be emitted, the cooling fan rotates at a high speed, a large amount of cold air is sucked into the converter cabinet body, forced cooling ventilation is carried out on the converter, the heat is rapidly taken away and blown to the atmosphere, and the purpose of cooling the converter is further achieved. The flow rate required for this type of fan is 0.6m3/s, the static pressure is 700Pa, and the noise sound power is not greater than 90dB (A).

The traditional design scheme is that the motor is installed in air outlet one side, and fan overall dimension axial length is 460mm, and along with the optimal design of train converter cabinet, the installation space of cooling fan reduces sharply, allows fan axial length size can not be greater than 300 mm. The original fan scheme can not meet the design requirement, and a new fan with a compact structure is urgently needed to replace the original fan scheme.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cooling fan of a converter for a subway train traction platform, which is used for solving the following technical problems:

along with the optimal design of a train converter cabinet, the installation space of a cooling fan is reduced rapidly, the original fan scheme cannot meet the design requirement, and a new fan with a compact structure is urgently needed to replace the original fan.

In order to achieve the purpose, the utility model provides the following technical scheme:

subway train pulls converter cooling blower for platform includes: an impeller; the air inlet duct assembly is arranged on one side of the impeller; the driving motor is arranged in the air inlet duct assembly, and the output end of the driving motor is fixedly connected with the impeller; the support frame assembly is fixed on one surface, far away from the impeller, of the air inlet duct assembly, and is fixedly connected with the driving motor; and a lead is arranged in the junction box of the driving motor and extends to the outside of the junction box, and the tail end of the lead is connected with the electric connector.

Further, the impeller is designed for welding type oblique flow and comprises a front wheel disc and a rear wheel disc, a plurality of arc-shaped blades are arranged between the front wheel disc and the rear wheel disc, and a wheel core is fixedly mounted at the circle center of the rear wheel disc.

Further, the blade leans out and the blade both ends link to each other with preceding rim plate and back rim plate welding respectively, the mounting hole has been seted up to wheel core centre of a circle department, the wheel core passes through mounting hole and driving motor's output fixed connection.

Further, the blades are inclined outwards at an angle of 18-22 °.

Further, the air inlet duct equipment contains the air inlet duct body, the air inlet duct body divide into horn mouth and mounting flange two parts, the one side welding that the air inlet duct body is close to the impeller has ground nut seat, still be equipped with on the air inlet duct body and turn to the signboard.

Furthermore, the support frame assembly is composed of a first support plate, a second support plate and a third support plate in a welded mode, the inner side face of the support plate assembly is fixedly connected with the bottom of the driving motor through bolts, and a horizontal installation angle is arranged on the outer side of the support plate assembly and is fixedly connected with the air inlet duct body through the matching of the horizontal installation angle and the grounding nut seat.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the fan (the motor is arranged on one side of the air outlet) in the traditional structure form is improved, and the driving motor is arranged in the air inlet duct (the motor is arranged on one side of the air inlet), so that the axial size of the fan is greatly shortened from 460mm to 293mm, the requirement of the installation space size of a novel train is met, and the original cooling performance is ensured.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is an exploded view of a cooling fan of a current transformer for a subway train traction platform;

FIG. 2 is an assembly schematic diagram of a cooling fan of a current transformer for a subway train traction platform;

FIG. 3 is a schematic view of the impeller structure;

FIG. 4 is a schematic view of blade pitch angle;

FIG. 5 is a schematic view of an assembly structure of the air inlet duct;

fig. 6 is a schematic view of an assembly structure of the supporting frame.

In the figure: 1. an impeller; 2. assembling an air inlet duct; 3. assembling a support frame; 4. a drive motor; 5. an electrical connector; 11. a front wheel disc; 12. a blade; 13. a rear wheel disc; 14. a wheel core; 21. an air inlet duct body; 22. a ground nut seat; 23. a steering signboard; 31. a first support plate; 32. a second support plate; 33. and a third support plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, in an embodiment of the present invention, a cooling fan of a converter for a subway train traction platform includes: an impeller 1; an air inlet duct assembly 2, wherein the air inlet duct assembly 2 is arranged on one side of the impeller 1; the driving motor 4 is arranged inside the air inlet duct assembly 2, and the output end of the driving motor 4 is fixedly connected with the impeller 1; the support frame assembly 3 is fixed on one surface, far away from the impeller 1, of the air inlet duct assembly 2, and the support frame assembly 3 is fixedly connected with the driving motor 4; and an electric connector 5, wherein a lead is arranged in a junction box of the driving motor 4 and extends to the outside of the junction box, and the tail end of the electric connector 5 is connected with the electric connector.

As an embodiment of the utility model, the driving motor is a 1.1kW small three-phase asynchronous motor, the driving motor is arranged in the air inlet duct assembly 2, the shaft extending end of the driving motor 4 extends into the impeller 1 and is fixed with the wheel core 14 for driving the impeller 1 to rotate, and the structural design greatly reduces the axial size of the fan and realizes installation in a narrow space. The bearing of the driving motor 4 is an imported maintenance-free bearing, and the service life of the bearing is as long as 4 ten thousand hours. The base and the end cover of the driving motor 4 are both made of cast aluminum alloy, so that the driving motor 4 has the characteristic of light weight, the weight of the driving motor 4 is only 10Kg, the whole fan has the characteristic of light weight, and the total weight of the fan is only 23 Kg. The base of the driving motor 4 is fixed with the supporting frame assembly 3 through 4 bolts. The drive motor 4 adopts the electric connector 5 in a wiring and electrifying mode, and the electrifying is quick and reliable.

As an embodiment of the present invention, the impeller 1 is designed as a welded oblique flow impeller, and is composed of a front disk 11, blades 12, a rear disk 13, and a core 14. The blades 12 are arc-shaped blades, and the number of the blades 12 is 8-10. The impeller 1 has the advantages of simple structure, simple forming process and low manufacturing cost. Different from the traditional vertical welding of blades, the blades 12 of the impeller 1 are not vertically connected with the front wheel disc 11 and the rear wheel disc 13 during welding, but are inclined outwards to form a certain angle (18-22 degrees), the structural design is equivalent to the forward sweeping noise reduction effect of the simulated axial flow impeller blades, the use working condition of the fan is wider, and the noise power of the fan is only 90dB (A). Impeller 1 rear wheel dish 13 arches towards the direction of admitting air, becomes an domes for the air current runner sudden change reduces, and airflow separation reduces, has the characteristic of oblique flow impeller, makes this fan under the same pressure condition, and the flow is bigger than centrifugal impeller.

As an embodiment of the present invention, the air duct assembly 2 is composed of an air duct body 21, a ground nut seat 22, and a turn signboard 23. The air inlet duct body 21 is divided into a bell mouth and an installation flange, and is formed by integrally pressing a special die. The bell mouth structure of the air inlet duct body 21 plays the roles of flow collection and rectification on the air inlet flow, so that the inlet flow smoothly enters the impeller 1, the vortex of the air inlet is reduced as much as possible, and the noise of the air inlet is optimized. The periphery of the mounting flange is upwards bent by 25-35 mm, so that the structural rigidity is improved. The radial clearance between the bell mouth of the air inlet duct body 21 and the front wheel disc 11 of the impeller 1 is controlled between 2mm and 4mm, so that the leakage loss at the position is reduced as much as possible, and the high efficiency of the fan is ensured. The front and back surfaces of the mounting flange are riveted with the steering signboard 23, so that a train inspector can conveniently check whether the rotation direction of the impeller 1 is correct.

As an embodiment of the present invention, the support frame assembly 3 is formed by welding a first support plate 31, a second support plate 32 and a third support plate 33, and mainly plays a role of supporting the driving motor 4. The plane of 3 inboard of support frame equipment is fixed through 4 bolts and 4 footing of driving motor, and 4 flat erection angles in the outside pass through 4 bolts to be fixed on air inlet duct equipment 2. The welding precision of the support frame assembly 3 is very high, the flat mounting angles at the outer side 4 are positioned on the same plane, and the positions of the 4 mounting holes are positioned on the same circle, so that the coaxiality requirement of the driving motor 4 and the impeller 1 is ensured.

The working principle of the utility model is as follows: when the fan works, a large amount of cold air outside the converter cabinet is sucked into the cabinet body, firstly enters the impeller 1 at a certain inlet airflow angle and speed through the flow collection effect of the air inlet duct assembly 2, is thrown out from the air outlet of the impeller 1 after the impeller 1 applies work, pressurizes and expands pressure, blows to the high-temperature converter, carries out forced cooling on the high-temperature converter, takes away heat quickly and blows to the atmosphere, and further achieves the purpose of cooling the converter. The cooling air takes away the heat around the driving motor 4 while flowing through the air inlet duct, so that the heat dissipation of the driving motor 4 is realized.

The foregoing is merely exemplary and illustrative of the present invention, and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims (6)

1. Subway train pulls converter cooling blower for platform, its characterized in that includes:

an impeller (1);

the air inlet duct assembly (2), wherein the air inlet duct assembly (2) is arranged on one side of the impeller (1);

the driving motor (4) is arranged inside the air inlet duct assembly (2), and the output end of the driving motor (4) is fixedly connected with the impeller (1);

the support frame assembly (3) is fixed on one surface, away from the impeller (1), of the air inlet duct assembly (2), and the support frame assembly (3) is fixedly connected with the driving motor (4);

and the electric connector (5), a lead is arranged in the junction box of the driving motor (4) and extends to the outside of the junction box, and the tail end of the electric connector is connected with the electric connector (5).

2. The converter cooling fan for the subway train traction platform as claimed in claim 1, wherein said impeller (1) is of welded diagonal design, and comprises a front wheel disc (11) and a rear wheel disc (13), a plurality of arc-shaped blades (12) are arranged between said front wheel disc (11) and said rear wheel disc (13), and a wheel core (14) is further fixedly mounted at the center of said rear wheel disc (13).

3. The converter cooling fan for the subway train traction platform as claimed in claim 2, wherein said blades (12) are inclined outward and both ends of said blades (12) are respectively welded to the front wheel disk (11) and the rear wheel disk (13), said wheel core (14) has a mounting hole at its center, said wheel core (14) is fixedly connected to the output end of the driving motor (4) through said mounting hole.

4. The converter cooling fan for a subway train traction platform as claimed in claim 3, wherein said blades (12) are inclined outwardly at an angle of 18 ° to 22 °.

5. The converter cooling fan for the subway train traction platform as claimed in claim 1, wherein said air inlet duct assembly (2) comprises an air inlet duct body (21), said air inlet duct body (21) is divided into a bell mouth and a mounting flange, a grounding nut seat (22) is welded on one side of said air inlet duct body (21) close to said impeller (1), said air inlet duct body (21) is further provided with a turning signboard (23).

6. The converter cooling fan for the subway train traction platform as claimed in claim 1 or 5, wherein said support frame assembly (3) is composed of a first support plate (31), a second support plate (32) and a third support plate (33) by welding, the inner side of said support frame assembly (3) is fixedly connected with the bottom of said driving motor (4) by means of bolts, and the outer side of said support frame assembly (3) is provided with a flat mounting angle and is fixedly connected with said intake duct body (21) by means of the cooperation of said flat mounting angle and said grounding nut seat (22).

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