CN216699794U

CN216699794U - Ventilation and heat dissipation assembly for frequency converter

Info

Publication number: CN216699794U
Application number: CN202122346757.4U
Authority: CN
Inventors: 武建鑫; 姚景占; 姚红宾; 乔少帅; 张洪峰; 王峰
Original assignee: Huaneng International Power Co ltd Hebei Clean Energy Branch
Current assignee: Huaneng International Power Co ltd Hebei Clean Energy Branch
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-06-07
Anticipated expiration: 2031-09-27

Abstract

The utility model discloses a ventilation and heat dissipation assembly for a frequency converter, which relates to the technical field of frequency converter heat dissipation equipment and comprises a tower drum, wherein the outer side wall of the tower drum is provided with a tower drum door, the outer side wall of the tower drum door is provided with an upper axial flow fan and a lower axial flow fan, the bottom of the tower drum is fixedly connected with the frequency converter, the inner side wall of the frequency converter is provided with a sliding groove, the inner side wall of the sliding groove is connected with a filter screen connecting piece in a sliding manner, the inner side wall of the filter screen connecting piece is fixedly connected with a novel filter screen, a plurality of oscillating springs are arranged right below the filter screen connecting piece, the inner side wall of the frequency converter is connected with an inner gear bin in a sliding manner, the inner side wall of the inner gear bin is provided with a reciprocating mechanism, the original paper filter screen is replaced by 100 meshes of stainless steel and nylon, the air permeability of the filter screen is good, the cleaning is convenient and the water washing can be realized, the service life is long, the replacement is not needed any more for almost ten years, and a lot of production cost is saved in the later period.

Description

Ventilation and heat dissipation assembly for frequency converter

Technical Field

The utility model relates to the technical field of frequency converter heat dissipation equipment, in particular to a ventilation and heat dissipation assembly for a frequency converter.

Background

The frequency converter is a power control device which applies a frequency conversion technology and a microelectronic technology and controls an alternating current motor by changing the frequency of a working power supply of the motor, and is a core component of a frequency conversion speed regulation system. With the increasing industrial automation degree, the frequency converter is widely applied in the fields of industrial control and daily life. The core circuit module of the frequency converter has the characteristics of high integration level, high frequency, high voltage, high speed and the like.

The heat dissipation measures of the frequency converter in the prior art are very limited, the frequency converter is used in spring and summer every year, along with the rise of air temperature, the spring is also in strong wind, high-temperature faults frequently occur every year in spring and summer, the fault rate of the spring and summer is obviously much higher than that of the spring and winter, besides the directly generated high-temperature faults, indirect faults caused by high temperature are more, over-temperature faults account for about 25% of the overall fault rate of the frequency converter, indirect faults caused by high temperature account for about 15% of the overall fault rate, the aging of electronic elements is accelerated due to long-term high-temperature operation, the service lives of core elements IGBT and circuit boards are rapidly reduced, finally, faults need to be reported to be maintained and replaced, the consumption of spare parts every year is very large, and meanwhile, the filtering effect of an old filter screen of the frequency converter is very common, and the use effect of the frequency converter is very influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art, and provides a ventilation and heat dissipation assembly for a frequency converter.

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

a ventilation and heat dissipation assembly for a frequency converter comprises a tower barrel, wherein a tower barrel door is arranged on the outer side wall of the tower barrel, an upper axial flow fan and a lower axial flow fan are arranged on the outer side wall of the tower barrel door, the bottom of the tower barrel is fixedly connected with the frequency converter, a sliding groove is formed in the inner side wall of the frequency converter, a filter screen connecting piece is connected to the inner side wall of the sliding groove in a sliding mode, a novel filter screen is fixedly connected to the inner side wall of the filter screen connecting piece, and a plurality of oscillating springs are arranged right below the filter screen connecting piece;

storehouse in the inside wall sliding connection of converter has the gear, the inside wall in storehouse is provided with reciprocating mechanism in the gear, the inside wall rotation of gear is connected with the transfer line, the tip fixedly connected with transmission fan of transfer line, the left and right sides lateral wall fixedly connected with driving piece in storehouse in the gear, the lateral wall fixedly connected with of driving piece drives the tooth, the inside wall rotation of converter is connected with and strikes and drives the gear, strike and drive the gear and drive the setting of tooth meshing, the inside wall fixedly connected with of converter strikes the guide rail, the inside wall sliding connection who strikes the guide rail has the piece of striking, the lateral wall that strikes the piece is provided with and drives the tooth from top to bottom, drive the tooth from top to bottom and strike and drive gear engagement and set up

Preferably, the reciprocating dust removal mechanism comprises meshing transmission teeth fixedly connected to the inner side wall of the gear inner bin, the inner side wall of the gear inner bin is rotatably connected with a transmission gear, the transmission gear is meshed with the meshing transmission teeth, and the transmission gear is fixedly connected to the lower end portion of the transmission rod.

Preferably, a conical air outlet cover is arranged at the air outlet of the back of the frequency converter, the conical air outlet cover is connected with a hose, and the other end of the hose is connected with an upper axial flow fan in a sliding manner.

Preferably, the outer side wall of the hose is sleeved with a support bracket, and the other end of the support bracket is fixedly connected to the inner side wall of the tower barrel.

Preferably, the inside wall of tower section of thick bamboo door is provided with limit switch feedback ware, the support holder is provided with automatic expansion bend.

Preferably, the upper axial flow fan and the lower axial flow fan have opposite fan directions.

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

1. according to the ventilation and heat dissipation assembly for the frequency converter, the original paper filter screen is replaced by the stainless steel and the nylon with 100 meshes, so that the filter screen is good in air permeability, convenient to clean, capable of being washed, long in service life, almost no longer needing to be replaced for ten years, and much production cost is saved in the later stage.

2. According to the ventilation and heat dissipation assembly for the frequency converter, the synchronization of the start and stop of the fan and the frequency converter is realized through the ventilation and heat dissipation transformation of the frequency converter, a fan power supply board and a fan control board which are originally used are omitted, the consumption of spare parts is reduced every year, the service life of a module fan is prolonged, the consumption of the fan is reduced, the module fan works at a constant frequency after starting, the ventilation volume of the module is increased greatly, the heat dissipation effect is good, the high-temperature problem of the frequency converter of the fan is thoroughly solved, the module runs at a relatively low temperature, the aging of core electronic devices in the module is reduced, the service life of the module is prolonged, the fault rate of the frequency converter is reduced, the later maintenance cost is reduced, and the generating capacity is improved.

Drawings

Fig. 1 is a schematic structural diagram of a ventilation and heat dissipation assembly for a frequency converter according to the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

fig. 3 is a schematic structural diagram of a reciprocating mechanism in a ventilation and heat dissipation assembly for a frequency converter according to the present invention;

fig. 4 is a schematic diagram of an external structure of a tower in a ventilation and heat dissipation assembly for a frequency converter according to the present invention.

In the figure: the device comprises a tower barrel 1, a tower barrel door 2, a frequency converter 3, a hose 4, a support bracket 5, an axial flow fan arranged on the upper portion of a 201, an axial flow fan arranged on the lower portion of a 202, a 301 filter screen connecting piece, a 302 novel filter screen, a 303 transmission rod, a 304 transmission fan, a 305 knocking driving gear, a 306 gear inner bin, a 307 meshing transmission gear, a 308 transmission gear, a 309 knocking guide rail, a 310 knocking piece, a 311 driving piece, a 312 driving gear and a 313 oscillating spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 and 2, a ventilation and heat dissipation assembly for a frequency converter comprises a tower barrel 1, a tower barrel door 2 is arranged on the outer side wall of the tower barrel 1, a limit switch feedback device is arranged on the inner side wall of the tower barrel door 2, an automatic expansion device is arranged on a support bracket 5, an upper axial flow fan 201 and a lower axial flow fan 202 are arranged on the outer side wall of the tower barrel door 2, a frequency converter 3 is fixedly connected to the bottom of the tower barrel 1, a conical air outlet cover is arranged at the air outlet of the back of the frequency converter 3, a hose 4 is connected to the conical air outlet cover, the support bracket 5 is sleeved on the outer side wall of the hose 4, the other end of the support bracket 5 is fixedly connected to the inner side wall of the tower barrel 1, the other end of the hose 4 is slidably connected with the upper axial flow fan 201, the fan direction of the upper axial flow fan 201 is opposite to that of the lower axial flow fan 202, a sliding groove is formed in the inner side wall of the frequency converter 3, and a filter screen connecting piece 301 is slidably connected to the inner side wall of the sliding groove, the novel filter screen 302 is fixedly connected to the inner side wall of the filter screen connecting piece 301, the plurality of oscillating springs 313 are arranged right below the filter screen connecting piece 301, and the original paper filter screen is replaced by 100-mesh stainless steel and nylon, so that the novel filter screen 302 is good in air permeability, convenient to clean, washable, long in service life, not required to be replaced any more in almost ten years, and much production cost is saved in the later period;

referring to fig. 3, the inner side wall of the frequency converter 3 is slidably connected with a gear inner bin 306, the inner side wall of the gear inner bin 306 is provided with a reciprocating mechanism, the reciprocating dust removing mechanism comprises a meshing transmission gear 307 fixedly connected to the inner side wall of the gear inner bin 306, the inner side wall of the gear inner bin 306 is rotatably connected with a transmission gear 308, the transmission gear 308 is meshed with the meshing transmission gear 307, the transmission gear 308 is fixedly connected to the lower end part of the transmission rod 303, the inner side wall of the gear inner bin 306 is rotatably connected with a transmission rod 303, the end part of the transmission rod 303 is fixedly connected with a transmission fan 304, the outer side walls of the left side and the right side of the gear inner bin 306 are fixedly connected with driving pieces 311, the outer side wall of the driving pieces 311 is fixedly connected with driving teeth 312, the inner side wall of the frequency converter 3 is rotatably connected with a knocking driving gear 305, the knocking driving gear 305 is meshed with the driving teeth 312, and the inner side wall of the frequency converter 3 is fixedly connected with a knocking guide rail 309, the inner side wall of the knocking guide rail 309 is slidably connected with a knocking piece 310, the outer side wall of the knocking piece 310 is provided with upper and lower driving teeth, and the upper and lower driving teeth are meshed with the knocking driving gear 305.

In the present invention, the functional principle can be illustrated by the following operation modes:

referring to fig. 1-3, in use, firstly, the lower axial flow fan 202 will introduce air with a relatively low temperature outside the tower drum 1 into the tower drum 1, so as to increase the air amount inside the tower drum 1 and provide an effective cooling medium, when the lower axial flow fan 202 sucks the outside air into the tower drum 1, because of the higher power of the lower axial flow fan 202, the sucked air will drive the transmission fan 304 to rotate, when the transmission fan 304 rotates, the transmission rod 303 will be driven to rotate, when the transmission rod 303 rotates, the inner gear bin 306 will reciprocate left and right on the inner side wall of the frequency converter 3 by the action of meshing the transmission teeth 307, when the inner gear bin 306 reciprocates, the driving teeth 312 on the outer side wall of the driving piece 311 will drive the knocking gear 305 to rotate, when the knocking gear 305 rotates, the knocking piece 310 will be driven to knock the filter screen connecting piece 301 down along the knocking guide rail 309, when the knocking guide rail 309 knocks the filter screen connecting piece 301 downwards, the filter screen connecting piece 301 can vibrate slightly under the action of the vibration spring 313, so that dust is difficult to attach to the surface of the novel filter screen 302;

when the lower axial flow fan 202 sucks external air into the tower barrel 1, the other upper axial flow fan 201 is connected with an air outlet on the back side of the frequency converter 3 through the hose 4 and the exhaust hood, the hose 4 is automatically induced to ascend, descend and contract through feedback signals of the limit switch on the tower barrel door 2, the upper axial flow fan is separated from the tower barrel door 2 and must ensure that the tower barrel door 2 can be normally opened and closed, heat generated by the frequency converter 3 is forcibly exhausted to the outside of the tower barrel 1, and heat dissipation is achieved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A ventilation and heat dissipation assembly for a frequency converter comprises a tower drum (1), and is characterized in that a tower drum door (2) is arranged on the outer side wall of the tower drum (1), an upper axial flow fan (201) and a lower axial flow fan (202) are arranged on the outer side wall of the tower drum door (2), the bottom of the tower drum (1) is fixedly connected with a frequency converter (3), a sliding groove is formed in the inner side wall of the frequency converter (3), a filter screen connecting piece (301) is connected to the inner side wall of the sliding groove in a sliding manner, a novel filter screen (302) is fixedly connected to the inner side wall of the filter screen connecting piece (301), and a plurality of oscillation springs (313) are arranged right below the filter screen connecting piece (301);

the inside wall sliding connection of converter (3) has storehouse (306) in the gear, the inside wall of storehouse (306) is provided with reciprocating mechanism in the gear, the inside wall rotation of storehouse (306) is connected with transfer line (303) in the gear, the tip fixedly connected with driving fan (304) of transfer line (303), the left and right sides outside wall fixedly connected with driving piece (311) of storehouse (306) in the gear, the outside wall fixedly connected with of driving piece (311) drives tooth (312), the inside wall rotation of converter (3) is connected with strikes and drives gear (305), it drives gear (305) and drives tooth (312) meshing setting to strike, the inside wall fixedly connected with of converter (3) strikes guide rail (309), the inside wall sliding connection that strikes guide rail (309) has strikes piece (310), the outside wall that strikes piece (310) is provided with drives the tooth from top to bottom, the upper and lower driving teeth are meshed with the knocking driving gear (305).

2. The ventilation and heat dissipation assembly for the frequency converter according to claim 1, wherein the reciprocating dust removal mechanism comprises a meshing transmission gear (307) fixedly connected to an inner side wall of the gear inner bin (306), a transmission gear (308) is rotatably connected to the inner side wall of the gear inner bin (306), the transmission gear (308) is meshed with the meshing transmission gear (307), and the transmission gear (308) is fixedly connected to a lower end portion of the transmission rod 303.

3. The ventilation and heat dissipation assembly for the frequency converter is characterized in that a conical air outlet cover is arranged at an air outlet on the back surface of the frequency converter (3), a hose (4) is connected to the conical air outlet cover, and the other end of the hose (4) is slidably connected with an upper axial flow fan (201).

4. The ventilation and heat dissipation assembly for the frequency converter according to claim 3, wherein a support bracket (5) is sleeved on an outer side wall of the hose (4), and the other end of the support bracket (5) is fixedly connected to an inner side wall of the tower drum (1).

5. The ventilation and heat dissipation assembly for the frequency converter is characterized in that a limit switch feedback device is arranged on the inner side wall of the tower door (2), and an automatic telescopic device is arranged on the supporting bracket (5).

6. The ventilation and heat dissipation assembly for the frequency converter according to claim 1, wherein the fans of the upper axial flow fan (201) and the lower axial flow fan (202) are in opposite directions.