Cooling structure for slip ring chamber of inner slip ring motor

Abstract

The utility model discloses a cooling structure for a slip ring chamber of an inner slip ring motor, and aims to provide a cooling structure for rapidly cooling the slip ring chamber of the inner slip ring motor, which is characterized by comprising a cooler, the cooler comprises a slip ring outdoor air path cooling part and a slip ring indoor air path cooling part, the outer air path cooling part is in a self-cooling type, and the slip ring indoor air path cooling part is in a self-cooling type. And the inner wind path cooling part is in a forced cooling type.

Description

Technical Field

[0001] This utility model relates to the field of internal slip ring motor equipment, and specifically to a cooling structure for the slip ring chamber of an internal slip ring motor. Background Technology

[0002] Slip ring motors, also known as three-phase wound-rotor AC asynchronous motors, require a resistor or reactor connected in series in the rotor circuit to reduce starting current, increase starting torque, improve power factor, and effectively enhance starting performance. Therefore, this type of motor is typically chosen for driving large-capacity machinery with high torque requirements.

[0003] Currently, Chinese patent CN103532304A discloses a structure for an internal slip ring motor cooler, including a shell, a first tube sheet, heat exchange tubes, baffles, a second tube sheet, a base plate, an air guide plate, a fan, and a fan shroud. The first tube sheet, the second tube sheet, the heat exchange tubes, and the baffles form a cooling device, wherein the first tube sheet, the baffles, and the second tube sheet are arranged vertically in sequence, and the heat exchange tubes are arranged horizontally and pass through the first tube sheet, the baffles, and the second tube sheet. The shell and the base plate form the cooler's outer frame, and the cooling device is installed inside the cooler's outer frame. An air inlet and an air outlet are opened on the base plate corresponding to the slip ring position, wherein the air inlet is located on the base plate between the baffles and the second tube sheet, and the air outlet is located on the base plate between the first tube sheet and the baffles. The fan shroud is fitted below one end of the cooler's outer frame, and ventilation holes are opened on the base plate at the fitted point. The fan is installed inside the fan shroud. An air guide plate is provided in the cooler's outer frame, one end of which is welded to the base plate at the ventilation hole, and the other end is welded to the cooling device.

[0004] Although this internal slip ring motor cooler structure cools the motor body and slip ring separately inside, with the slip ring cooling part and the motor cooling part separated by a partition, thus achieving a cooling effect, existing internal slip ring motors are often plagued by high slip ring temperature and large carbon brush wear. The carbon powder accumulation caused by carbon brush wear makes the problem more complicated. Summary of the Invention

[0005] The purpose of this invention is to provide a cooling structure for the slip ring chamber of an internal slip ring motor, which has the advantages of preventing slip ring overheating, abnormal carbon brush temperature, and carbon powder accumulation, thereby ensuring reliable motor operation, reducing maintenance costs, and improving motor utilization.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A cooling structure for the slip ring chamber of an internal slip ring motor includes a slip ring chamber cavity, a carbon brush slip ring system is further provided inside the slip ring chamber cavity, and a cooler is provided outside the slip ring chamber cavity. The cooler includes an external air cooling circulation and an internal air cooling circulation.

[0008] By adopting the above technical solution, the cooler includes two parts: an outdoor air cooling cycle with a slip ring and an indoor air cooling cycle with a slip ring. The outdoor air cooling cycle is actually a self-cooling type, while the indoor air cooling cycle is a forced cooling type.

[0009] Further configuration: The external air cooling circulation includes an external fan located outside the slip ring chamber cavity and an external cooling pipe located outside the slip ring chamber cavity.

[0010] By adopting the above technical solution, the external air cooling circulation includes an external fan and an external cooling pipe. The external air cooling circulation blows air into the cooler through the external fan and discharges it through the external cooling pipe.

[0011] Further configuration: The internal air cooling circulation includes an internal air fan located at the top of the slip ring chamber cavity, an air concentrator located inside the slip ring chamber cavity, a baffle plate located at the bottom of the slip ring chamber cavity, and a filter located at the outlet of the internal air cooling circulation.

[0012] By adopting the above technical solution, the internal air cooling circulation forms a closed loop through the internal air fan, air concentrator, baffle and filter. The heat generated by the internal air cooling circulation is exchanged and discharged by the external air cooling circulation. With the internal air fan, the air circulation is forced, which makes the circulation cooling effect better.

[0013] In summary, this utility model has the following beneficial effects: the internal air cooling circulation is a forced cooling type, and the addition of filters and baffles reduces wind resistance and improves cooling efficiency. Simultaneously, the use of a filter effectively collects carbon dust, reducing the failure rate and ensuring reliable motor operation. Some internal slip ring motors have long been plagued by slip ring overheating and excessive carbon brush wear, with carbon dust accumulation due to brush wear further complicating the problem. Currently, as motor capacity increases, slip ring and carbon brush issues are becoming increasingly prominent. Minor issues include slip ring overheating and abnormal carbon brush temperature; severe issues include slip ring burns, drastically reduced carbon brush life, and even slip ring arcing that burns out the motor, significantly increasing motor maintenance costs. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of the cooling structure of the slip ring chamber of an internal slip ring motor.

[0016] Figure 2 This is a side view of the cooling structure of the slip ring chamber of an internal slip ring motor.

[0017] In the diagram: 1. Internal air duct fan; 2. Filter; 3. Cooler; 4. Air concentrator; 5. Carbon brush slip ring system; 6. Slip ring chamber; 7. External air duct cooling circulation; 8. External fan; 9. External cooling pipe; 10. Baffle plate; 11. Internal air duct cooling circulation. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0019] The technical solution adopted in this utility model is:

[0020] A cooling structure for the slip ring chamber of an internal slip ring motor, such as Figure 1 and Figure 2 As shown, the cooler 3 comprises two parts: a slip-ring outdoor air cooling cycle 7 and a slip-ring indoor air cooling cycle 11. The outdoor air cooling cycle 7 is a self-cooling type, while the indoor air cooling cycle 11 is a forced cooling type. The outdoor air cooling cycle 7 includes an outdoor fan 8 and an outdoor cooling pipe 9, while the indoor air cooling cycle 11 includes an indoor air fan 1, a concentrator nozzle 4, a baffle plate 10, and a filter 2. The outdoor air cooling cycle 7 blows air into the cooler 3 through the outdoor fan 8 and discharges it through the outdoor cooling pipe 9. The indoor air cooling cycle 11 forms a closed loop through the indoor air fan 1, the concentrator nozzle 4, the baffle plate 10, and the filter 2. All the heat generated by the indoor air cooling cycle 11 is exchanged and discharged by the outdoor air cooling cycle 7.

[0021] Its main working principle is as follows: The cooler 3 is equipped with an internal airflow fan 1, which forces airflow circulation to improve the cooling effect. An air-concentrating nozzle 4 is installed in the slip ring chamber 6 to make the cold air entering the slip ring chamber 6 directional, thus making the internal airflow cooling circulation 11 smoother. At the same time, a baffle plate 10 is installed in the slip ring chamber 6 so that the cold air entering the slip ring chamber 6 will not concentrate at the bottom of the slip ring chamber 6 after the carbon brush slip ring system 5, but will be blocked by the baffle plate 10 and return directly, which greatly reduces the wind resistance of the internal airflow cooling circulation 11 and improves the cooling efficiency. In addition, the cooler 3 is equipped with a filter 2, which can effectively filter the carbon powder carried in the internal airflow cooling circulation 11.

[0022] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the utility model's technical solution.

Claims

1. A cooling structure for a slip ring chamber of an internal slip ring motor, comprising a slip ring chamber cavity (6), wherein a carbon brush slip ring system (5) is further provided within the slip ring chamber cavity (6), characterized in that: The slip ring chamber cavity (6) is also provided with a cooler (3), which includes an outdoor air cooling circulation (7) and an indoor air cooling circulation (11).

2. The cooling structure for the slip ring chamber of an internal slip ring motor according to claim 1, characterized in that: The external air cooling circulation (7) includes an external fan (8) located outside the slip ring chamber cavity (6) and an external cooling pipe (9) located outside the slip ring chamber cavity (6).

3. The cooling structure for the slip ring chamber of an internal slip ring motor according to claim 2, characterized in that: The internal air cooling circulation (11) includes an internal air fan (1) located at the top of the slip ring chamber cavity (6), an air concentrator (4) located inside the slip ring chamber cavity (6), a baffle plate (10) located at the bottom of the slip ring chamber cavity (6), and a filter (2) located at the outlet of the internal air cooling circulation (11).

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