CN219554724U - Air cooler for motor and motor - Google Patents

Abstract

The utility model belongs to the technical field of air coolers, and provides an air cooler for a motor and an engine, wherein the air cooler comprises a shell, a cooling pipe and an axial flow fan; the upper part of the shell is provided with a through hole, and the axial flow fan is fixed at the through hole at the upper part of the shell; the cooling pipe is arranged inside the shell; according to the utility model, the through hole is formed in the upper part of the shell of the existing knapsack type air cooler, the axial flow fan is fixed at the through hole, the internal air volume of the cooler is increased and the internal air pressure is increased by adding one axial flow fan on the basis of keeping the inherent rotating speed of the motor and adopting a forced ventilation mode, and the purpose of increasing the heat exchange power of the cooler is realized by increasing the internal air volume and the air pressure, so that the air cooling effect is ensured.

Description

Air cooler for motor and motor

Technical Field

The utility model belongs to the technical field of air coolers, and particularly relates to an air cooler for a motor and the motor.

Background

In the working process of the asynchronous motor, the self-inherent rotation speed of the motor is utilized, and the forced ventilation mode is adopted by the exhaust fan at the side face of the motor, so that the heat in the motor is taken away by the heat dissipation tube bundles distributed in the knapsack type air cooler at the top of the motor; the heat dissipation tube bundle is also called a cooling tube, specifically, external cold air enters from one end of the cooling tube to the other end for removal, and in the process, the cold air in the cooling tube exchanges heat with heat in the air cooler and the like.

The inventor finds that the backpack type air cooler for the motor is low in heat dissipation power and heat dissipation efficiency, and cannot effectively reduce the temperature of a stator coil in the running process of the motor for an asynchronous motor which is installed indoors and has high ambient temperature and poor ventilation, the motor can be operated under a high-temperature working condition for a long time, so that the insulation degradation and the whole service life of the stator coil of the motor can be shortened, faults such as grounding, short circuit, tripping and the like occur in the running process, and the safety and stable running of equipment and related systems are affected.

Disclosure of Invention

In order to solve the problems, the utility model provides an air cooler for a motor and the motor, and the utility model reduces wind resistance by improving the design of an air path of the air cooler by adopting a forced ventilation mode and still by means of the inherent rotation speed of the motor; through increasing an axial fan, increase the internal wind amount of cooler, improve the internal wind pressure, through improving internal air amount and wind pressure, the cooler heat exchange power obtains improving, has ensured the forced air cooling effect.

According to some embodiments, a first aspect of the present utility model provides an air cooler for a motor, which adopts the following technical schemes:

an air cooler for an electric motor comprises a shell, a cooling pipe and an axial flow fan;

the upper part of the shell is provided with a through hole, and the axial flow fan is fixed at the through hole at the upper part of the shell; the cooling pipe is arranged inside the shell.

Further, the air outlet of the axial flow fan is far away from the shell.

Further, a plurality of air inlets are formed in the side face of the shell.

Further, the dust cover is fixed at the air inlet.

Further, a plurality of cooling pipe groups are distributed in the shell, and a plurality of cooling pipes are uniformly distributed in each cooling pipe group.

Further, the cooling pipes on two adjacent layers are distributed in a crossed mode.

Further, the inlet of the cooling pipe is communicated with the outside air, and the outlet is arranged at the position of the exhaust fan of the motor.

Further, a plurality of ear plates are fixed at the edge of the bottom of the shell, and fixing holes are formed in the ear plates.

Further, the inner surface and the inner surface of the shell are coated with an H06-4 zinc-rich epoxy primer layer and an epoxy Yun Tiede paint layer.

According to some embodiments, a second aspect of the present utility model provides an electric motor, which adopts the following technical solutions:

an electric motor employing the air cooler for electric motor as described in the first aspect.

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

according to the utility model, the through hole is formed in the upper part of the shell of the existing knapsack type air cooler, the axial flow fan is fixed at the through hole, and on the basis of keeping the inherent rotating speed of the motor and adopting a forced ventilation mode, the axial flow fan is added, so that hot air in the cooler can be directly discharged, the cooling effect is improved, meanwhile, the internal air volume of the cooler is increased, the internal air pressure is improved, the purpose of improving the heat exchange power of the cooling pipe in the cooler is achieved by improving the internal air volume and the air pressure, and the air cooling effect is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a side cross-sectional view of the present utility model;

FIG. 4 is a top view of the present utility model;

wherein: 1. a housing; 2. an axial flow fan; 3. a fixing bolt; 4. an air inlet; 5. a cooling tube; 6. and a fixing hole.

The specific embodiment is as follows:

the utility model will be further described with reference to the drawings and examples.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

Example 1:

as described in the background art, the backpack type air cooler for the motor has the advantages that the heat dissipation power is low, the heat dissipation efficiency is low, the temperature of the stator coil in the operation process of the motor cannot be effectively reduced for the asynchronous motor which is installed indoors and has high ambient temperature and poor ventilation, and the motor can be operated under the high-temperature working condition for a long time, so that the insulation degradation of the stator coil of the motor can be caused, and the overall service life is shortened.

Aiming at the problems that the heat exchange power is smaller and the heat exchange efficiency is lower in the conventional knapsack type air cooler for the motor, and the requirements of long-term, safe and stable operation of the motor can not be met in special environments such as indoor environments and extreme high-temperature weather, as shown in fig. 1 and 2, the embodiment provides the air cooler for the motor, which comprises a shell 1, an axial flow fan 2, an air inlet 4, a cooling pipe 5 and the like;

the upper part of the shell 1 is provided with a through hole, and the axial flow fan 2 is fixed at the through hole at the upper part of the shell 1; the cooling pipe 5 is arranged inside the housing 1. It can be appreciated that the through hole is formed in the upper portion of the shell of the conventional backpack type air cooler, the axial flow fan 2 is fixed on the upper portion of the shell 1 through the fixing bolt 3, and when the axial flow fan 2 works, the air in the shell can be extracted outwards through the through hole, a part of hot air is directly extracted, and the ventilation flow is increased. Specifically, through set up axial fan 2 on current knapsack formula air cooler's casing upper portion, keep on the basis of adopting forced draft's mode with the help of motor self intrinsic rotational speed, through increasing an axial fan 2, increase the interior wind amount of cooler, improved interior wind pressure, through improving interior amount of wind and wind pressure, realized improving the purpose of cooling tube department heat exchange power in the cooler, simultaneously, axial fan 2 can directly take out a portion of hot-blast, ensured the forced air cooling effect.

The air outlet of the axial flow fan 2 is far away from the shell, so that the purpose of outwards extracting the gas in the shell 1 is fulfilled.

A plurality of air inlets 4 are formed in the side face of the shell 1; and a dust cover is fixed at the air inlet 4. Specifically, two air inlets 4 are formed in the front side surface and the rear side surface of the casing 1, and when the axial flow fan 2 draws the air in the casing to the upper part outside the casing 1, the air located in the side surface of the casing 1 enters the casing 1 through the air inlets 4; the dust cover may be fixed to the air inlet 4 by bolts or the like.

As shown in fig. 2 and 3, a plurality of cooling pipes 5 are uniformly arranged in each cooling pipe group, and a plurality of cooling pipe groups are arranged in the casing 1. The cooling pipes on two adjacent layers are distributed in a crossed way. Specifically, each cooling pipe is independently arranged, the inlet of each cooling pipe is connected with the atmosphere, the outlet is positioned at the exhaust fan on the motor, outside air is pumped into the cooling pipes and discharged under the action of the exhaust fan or the fan on the motor, wind in the cooling pipes is cold wind, wind in the shell 1 is heat generated under the action of the stator coil of the motor, and the like, and the cold wind and the hot wind exchange heat through the cooling pipes to realize the effect of cooling in the shell 1.

The bottom edge of the shell 1 is fixed with a plurality of ear plates, and the ear plates are provided with fixing holes 6 for connecting the cooler with a cooling object, wherein the cooling object can be a motor stator coil part, and the shell is communicated with the motor stator coil part, so that heat generated by the motor stator coil can enter the shell 1.

The inner surface and the inner surface of the shell 1 are coated with an H06-4 zinc-rich epoxy primer layer and an epoxy Yun Tiede paint layer. Optionally, a first layer of H06-4 zinc-rich epoxy primer and a second layer of epoxy cloud iron primer are coated on the inner surface of the shell of the air cooler; the outer surface H06-4 of the shell of the air cooler is provided with two layers of zinc-rich epoxy primer and three layers of epoxy cloud iron primer; wherein the total thickness of the paint film is 130-160 m, and the thickness of the paint film of the zinc-rich epoxy primer is 60m. The shell 1 of the air cooler can be made of Q235 steel plates, the flatness of the matching surface of the shell 1 and the machine base is less than or equal to 2mm, oxide scales can be removed by sand blasting treatment on the inner surface and the outer surface of the shell 1, rust corrosion is avoided, the cooler is firmly welded, the integrity is good, the surface is flat and smooth, and no obvious concave-convex trace exists. The cooler is firm in welding, good in overall rigidity, and flat and smooth in shell surface, and free of obvious concave-convex phenomenon; the machine base is a part of the top of the stator machine base, which is contacted with the radiator.

The air cooler after transformation in the embodiment has good sealing performance and obviously improved cooling effect. Through measurement and calculation, the air quantity of the reformed internal air is: 16000m3/h; wind pressure of internal wind: 300Pa; the inherent rotation speed of the motor is still used, and a forced ventilation mode is adopted, so that the wind resistance is reduced by improving the wind path design of the air cooler; through increasing a power 3kW axial fan, increase the internal wind amount of cooler, improve internal wind pressure. By improving the internal air quantity and the air pressure, the heat exchange power of the cooler is improved to 50kW from 40kW originally. After transformation, the temperature of the stator coil of the motor is reduced by about 16 ℃ under the same operation condition. The problems of high temperature, short service life and high failure rate of the stator coil in the running of the asynchronous motor which is arranged indoors and has high ambient temperature and poor ventilation are solved.

Example 2:

a motor adopts the air cooler for the motor as described in the embodiment 1, for example, a through hole is formed at the upper part of a shell of a knapsack type air cooler in a traditional motor, and an axial flow fan 2 is fixed at the upper part of the shell 1 through a fixing bolt 3 to obtain a new motor; the asynchronous motor and the cooler are the same as each other, i.e., the motor in the present embodiment.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (6)

1. An air cooler for an electric motor is characterized by comprising a shell, a cooling pipe and an axial flow fan;

the upper part of the shell is provided with a through hole, and the axial flow fan is fixed at the through hole at the upper part of the shell; the cooling pipe is arranged inside the shell;

the air outlet of the axial flow fan is far away from the shell;

a plurality of cooling pipes are uniformly distributed in each layer of cooling pipe group;

the cooling pipes on two adjacent layers are distributed in a crossed way;

the inlet of the cooling pipe is communicated with the outside air, and the outlet is arranged at the position of a fan of the motor.

2. An air cooler for an electric motor as set forth in claim 1 wherein said housing has a plurality of air inlets formed in a side thereof.

3. An air cooler for an electric motor as set forth in claim 2 wherein said air inlet is fixedly provided with a dust cover.

4. The air cooler for a motor according to claim 1, wherein a plurality of ear plates are fixed to the bottom edge of the housing, and fixing holes are formed in the ear plates.

5. An air cooler for an electric motor as set forth in claim 1 wherein the inner surface and the inner surface of said housing are each coated with an H06-4 zinc-rich epoxy primer layer and an epoxy Yun Tiede paint layer.

6. An electric motor employing the air cooler for electric motor according to any one of claims 1 to 5.