CN210927286U - Explosion-proof motor base with ejection wire structure - Google Patents

Abstract

The utility model discloses a flame-proof type motor base adopting an ejection wire structure, which comprises a main junction box base, an auxiliary junction box base and radiating fins; a plurality of ventilation channels are distributed in the engine base, the ventilation channels are arranged in a certain mode, and the connection part of the ventilation channels and the engine base barrel is of a variable-thickness structure. Under the condition that the weight and the center height of the base are not increased and the structural strength of the motor is guaranteed, the radial rigidity of the base structure is improved by adopting a special technical means, so that the shockproof purpose is achieved, meanwhile, the internal ventilation sectional area of the base is increased by adopting a special structural design, so that the internal and external heat exchange efficiency of the base is greatly and effectively improved, the service life of the motor is effectively prolonged, and the operation safety is guaranteed.

Description

Explosion-proof motor base with ejection wire structure

Technical Field

The utility model relates to the technical field of electric machines, be applicable to high-speed, large capacity explosion proof machine.

Background

The current motor industry is developing towards high speed and large capacity, and higher requirements are put forward on the characteristics of vibration, ventilation, heat dissipation and the like of a base structure. For explosion-proof motors, besides vibration and ventilation heat dissipation, the structural strength also has very high requirements, and as the most important structural component of the motor, the main body part for vibration reduction, noise reduction and ventilation heat dissipation efficiency improvement, and the design of the base is also an important part in the structural design of the whole motor.

The explosion-proof machine base is provided with an inner radiating fin, an outer radiating fin and an inner ventilating duct. The main excitation source for the motor to generate vibration is the unbalanced mass of the rotor, so that the vibration of the motor is mainly expressed as radial (horizontal and vertical) vibration under the condition of a certain balance level; the ventilation and heat dissipation capacity of the motor is mainly influenced by the internal and external surface areas, the internal ventilation sectional area, the internal and external heat exchange efficiency and the like.

The engine base in the prior art vibrates violently, and how to prevent large amplitude vibration is a technical problem in the field. Meanwhile, the temperature rise amplitude is large in use and after use, and the service life and the working efficiency of the motor are seriously influenced. In the prior art, for example, patent documents CN209217886U and CN209104929U have taken measures for improving heat dissipation, but it is still a significant problem to improve the base itself completely so as to enhance the vibration prevention and heat dissipation functions. In the field, a targeted research on technical problems such as vibration and heat dissipation is urgently needed to completely solve the technical problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses under the condition that does not increase frame weight and central height, guarantee motor structure intensity, adopt special technical means to improve the radial rigidity of frame structure to reach shockproof purpose, adopt the inside ventilation sectional area of special structural design increase frame simultaneously, thereby increase substantially, improve inside and outside heat exchange efficiency in the frame effectively, effectively improve the motor life, guarantee operation safety.

Particularly, the utility model improves the vibration damping performance of the frame by increasing the radial rigidity of the frame; according to the characteristics of the motor structure, the ventilation and heat dissipation efficiency is improved by optimizing the structure of the ventilation duct, increasing the ventilation pipe and the like.

An explosion-proof motor base adopting an ejection wire structure comprises a base cylinder, a main junction box base, an auxiliary junction box base and a radiating fin; a plurality of ventilation channels are distributed in the engine base, the ventilation channels are arranged in a certain mode, and the connection part of the ventilation channels and the engine base barrel is of a variable-thickness structure.

Specifically, the air-conditioning system comprises two box type ventilation channels, wherein the box type ventilation channels are provided with ventilation pipes.

Specifically, the air duct includes a top air duct that prevents the external junction box location from being out of the wind.

Specifically, the cooling fin is an annular cooling fin and is used for improving the radial rigidity of the engine base.

Specifically, the thickness of the variable thickness structure on the base cylinder continuously and uniformly increases from the periphery of the air duct to the direction of the air duct.

Specifically, the thickness of the variable thickness structure on the base cylinder is 14-55mm, and the variable thickness structure continuously and uniformly increases from the periphery of the air duct to the direction of the air duct.

Specifically, the thickness of the variable thickness structure on the base cylinder is 14-28mm, and the variable thickness structure continuously and uniformly increases from the periphery of the air duct to the direction of the air duct.

Specifically, the thickness of the variable thickness structure on the base cylinder is 18-36mm, and the variable thickness structure continuously and uniformly increases from the periphery of the air duct to the direction of the air duct.

Specifically, the thickness of the variable thickness structure on the base cylinder is 22-51mm, and the variable thickness structure continuously and uniformly increases from the periphery of the air duct to the direction of the air duct.

The whole machine base is formed by casting, machined into the sizes of end cover matching surface, junction box matching surface, inner circle and the like, a ventilation hole is drilled in a box type ventilation duct end plate, and the ventilation duct is fixed on the machine base through an expansion process after the ventilation duct is inserted.

Owing to adopt the utility model discloses a technical means can reach following beneficial effect:

1. the explosion-proof motor base with the ejection wire structure is characterized in that ventilation channels are additionally arranged at the junction box mounting position at the top of the base, 5 ventilation channels are distributed in the base, the ventilation sectional area can be effectively increased, and is increased by 24-71% compared with the existing base, so that the ventilation and heat dissipation effects are obviously improved, and the temperature rise is reduced. The temperature rise of the shaft extension end and the non-shaft extension end is obviously reduced, and can be respectively reduced to 60 ℃ and 57 ℃ compared with 95 ℃ of a specified value, and meanwhile, the measured maximum surface temperature of the shell reaches 62 ℃, and is reduced by a half compared with 130 ℃ of the specified value in the prior art.

Meanwhile, because of adopting the variable thickness structure, increase to the air duct direction from the air duct periphery in succession evenly, the variable thickness structure of different structures is designed to the motor of different models, and the annular structure fin, can obtain the very big promotion of mechanical strength and rigidity, thereby vibration displacement, vibration speed and vibration acceleration homogeneous phase reduce more than half than prior art's specified value, gain splendid, satisfied ventilation cooling effect and prevent the vibration effect, and above-mentioned air duct structure synergism, solve the poor and high technological problem of vibration intensity of the poor and high grade of heat dissipation situation among the prior art, satisfy the long-time, high-load work needs of motor, guarantee motor work efficiency, improve production and using value, guarantee the life-span of motor.

The footing air duct of frame adopts box air duct structure, simultaneously at the drilling of air duct box end plate, thereby uses the air duct structure to form unblocked wind path structure, can improve ventilation cooling efficiency.

The radiating fins in the base adopt annular radiating fins in the circumferential direction; the inner part of the machine base cylinder is provided with a hole, so that the machine base can conveniently clean sand after casting.

The ventilation duct adopts box structure to link to each other with the frame through the tight technology of expanding makes the ventilation pipe, can make the amount of wind of outer fan take away the inside heat of frame through the ventilation pipe, this design makes the inside and outside heat exchange efficiency of frame greatly promote.

Drawings

FIG. 1 is a schematic view of the entire housing;

FIG. 2 is a schematic view of the internal plenum of the housing;

FIGS. 3A-3B are schematic views of the plenum and the tubes of the base feet; FIG. 3C is a schematic illustration of the frame foot plenum detail and ventilation;

FIG. 4 is a schematic view of an annular heat sink and sand removal process holes inside the housing;

FIG. 5 is a schematic view of an air path of the inner structure of the base;

FIG. 6 is a schematic view of the internal ventilation cooling of the housing;

FIGS. 7A-7C are different types of variable thickness structure diagrams of the present invention;

fig. 8A-8B are schematic structural views of an axial fin of the prior art and an annular fin of the present invention, respectively.

Detailed Description

Example 1

As shown in fig. 1-5, the utility model relates to a flame-proof type motor frame of ejecting line structure, its external structure mainly includes a frame section of thick bamboo 1, main terminal box seat 2, supplementary terminal box seat 3, outside fin 4, footing 5, 2 box ventiduct 6.

The interior of the machine base is distributed with 5 ventilation ducts, and the connection part of the ventilation ducts and the machine base barrel adopts a variable-thickness structure 7, so that the stress concentration can be effectively reduced, and the structural strength and the rigidity of the machine base can be effectively improved. The air duct is respectively as follows: 1 top air duct 8, 2 side top air duct 9, 2 box air duct 10 in bottom, the box air duct end plate drilling of bottom uses several ventilation pipes 11 to improve heat exchange efficiency, and both ends distribute has annular fin 12, and it has sand removal fabrication hole 13 to open on the frame section of thick bamboo.

The whole machine base is formed by casting, machined into the sizes of end cover matching surface, junction box matching surface, inner circle and the like, a ventilation hole is drilled in a box type ventilation duct end plate, and the ventilation duct is fixed on the machine base through an expansion process after the ventilation duct is inserted.

Example 2

This embodiment provides the thickness structure that designs to the motor of different models, as fig. 7A-7C, the ventiduct adopts the thickness structure with the frame section of thick bamboo junction, and specific structure size designs according to the motor of different center heights, and this embodiment is 355, 400, 450mm for the center height respectively. Experiments prove that the stress concentration can be effectively reduced, and the structural strength and the rigidity of the engine base are effectively improved. Therefore, the vibration of the motor is prevented, the working environment of the motor is ensured, the working efficiency of the motor is improved, the long-time and high-load running of the motor is met, the industrial production efficiency is improved, the investment cost of enterprises is reduced, the input-output ratio is improved, the economic benefit is improved, stable and high-quality sustainable running is realized, the technical problem of vibration prevention is solved in the field, and technical innovation and progress in the field are promoted.

Example 3

This embodiment provides a difference from prior art annular fins, such as the fins of fig. 8A-8B, in that prior art axial fins do not provide effective contact conduction of heat and heat cannot be readily conducted away. The annular can make conduction area increase greatly, and the conduction effect is showing and is promoting. It can further strengthen the heat dissipation function, simultaneously, because the design is the annular, structurally is showing differently with the axial fin, can effectively offset the vibration that the frame itself produced, effectively deals with external stress for external force and internal force are sparse in unique structure, thereby can further guarantee the mechanical strength and the rigidity of frame.

Like fig. 6-7, adopt the utility model discloses a structure, interior wind path and outer wind path are under the intercommunication of ventiduct and ventilation pipe, and inside forms crisscross each other, unblocked wind path structure, can be on the basis that does not use outside heat radiation structure, in time, fast, give off the inside heat of motor effectively, improve the motor life-span, guarantee staff's safety. To the high motor design in different centers the utility model discloses an air path structure, the contrast table of interior surface area, outer surface area and the area of ventilating section who obtains as follows:

TABLE 1

Can derive by last table, the utility model discloses to the motor of different models, interior surface area, external surface area all show the increase, and reasonable in distribution, even directly lead to interior wind sweetgum fruit to lead to the wind sectional area and show and rise, can improve 24-71% to show and improve ventilation cooling effect, reduce the temperature rise.

The utility model discloses the motor vibration and the radiating quality data that obtain see the following table:

TABLE 2

TABLE 3

Can reach by last table, the utility model discloses a thickness change structure and loop configuration can show and promote structural strength, and rigidity obtains promoting 12-40%.

The adopted ventilation structure can obviously reduce the temperature rise of the shaft extension end and the non-shaft extension end, and can respectively reduce the temperature to 60 ℃ and 57 ℃ compared with 95 ℃ of a specified value, and simultaneously, the measured maximum surface temperature of the shell reaches 62 ℃ and is reduced by a half compared with 130 ℃ of the specified value in the prior art.

Meanwhile, due to the adoption of the variable thickness structure and the annular structure, the mechanical strength and the rigidity can be greatly improved, so that the vibration displacement, the vibration speed and the vibration acceleration are reduced by a half compared with the specified values in the prior art, an excellent and satisfactory ventilation and heat dissipation effect and a vibration prevention effect are obtained, the technical problems of poor heat dissipation condition, high vibration strength and the like in the prior art are solved, the working requirements of a motor for a long time and high load are met, the working efficiency of the motor is ensured, the production and application values are improved, the service life of the motor is ensured, and the application potential is huge in industrial production and application.

Claims (10)

1. The utility model provides an adopt flame-proof type motor frame of ejecting line structure, includes a frame section of thick bamboo, its characterized in that: the wire connecting device also comprises a main wire connecting box base, an auxiliary wire connecting box base and a radiating fin; a plurality of ventilation channels are distributed in the engine base, the ventilation channels are arranged in a certain mode, and the connecting part of the ventilation channels and the engine base barrel is of a variable-thickness structure.

2. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the ventilation device comprises two box type ventilation channels, wherein the box type ventilation channels are provided with ventilation pipes.

3. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the plenum includes a top plenum for preventing the external junction box location from wind.

4. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the radiating fins are annular radiating fins and are used for improving the radial rigidity of the engine base.

5. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the thickness of the variable thickness structure is continuously and uniformly increased from the periphery of the air duct to the direction of the air duct.

6. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the thickness of the variable thickness structure is 14-55mm, and the thickness of the variable thickness structure is continuously and uniformly increased from the periphery of the air duct to the direction of the air duct.

7. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the thickness of the variable thickness structure is 14-28mm, and the thickness of the variable thickness structure is continuously and uniformly increased from the periphery of the air duct to the direction of the air duct.

8. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the thickness of the variable thickness structure is 18-36mm, and the thickness of the variable thickness structure is continuously and uniformly increased from the periphery of the air duct to the direction of the air duct.

9. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the thickness of the variable thickness structure is 22-51mm, and the thickness of the variable thickness structure is continuously and uniformly increased from the periphery of the air duct to the direction of the air duct.

10. The flameproof motor base adopting the ejection wire structure according to claim 1, characterized in that: the radiating fin and the base cylinder are integrally cast and formed and used for improving radiating performance.

Images