Winding motor structure with built-in collector ring

Abstract

This utility model discloses a wound-rotor motor structure with a built-in slip ring, including a housing. A rotating shaft is rotatably inserted into the housing along its extension direction. A rotor, a slip ring, and a fan blade are sequentially fixedly sleeved on the surface of the rotating shaft along its axial direction. A stator is fixed inside the housing and located outside the rotor. The rotor can rotate relative to the stator. This utility model integrates the slip ring into the motor and uses a first and a second flow guide baffle and air cooling to remove toner from the motor, avoiding short circuits. This completes the removal of toner generated by the slip ring. After solving the toner problem, the slip ring is placed inside the motor, reducing the axial dimension by 15%-20%. The internal cooling of the motor also cools the slip ring, reducing the loss of the external slip ring fan.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a wound motor structure with built-in slip rings. Background Technology

[0002] Currently, the slip rings of wound-rotor motors are generally externally mounted with a dedicated protective cover. This design is intended to prevent carbon dust generated after the carbon brushes wear out and enters the motor, causing a short circuit. However, designing an external slip ring increases the axial dimension by 15%-20%, which is not conducive to the compact design of the motor. In addition to adding a dedicated protective cover and an external slip ring fan, it also increases the cost. Therefore, a wound-rotor motor structure with an internal slip ring is proposed to solve this problem. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0004] The wound-rotor motor structure with built-in slip ring includes a housing. A rotating shaft is rotatably inserted into the housing along its extension direction. A rotor, slip ring, and fan blades are sequentially fixedly sleeved on the surface of the rotating shaft along its axial direction. A stator is fixed inside the housing and outside the rotor. The rotor can rotate relative to the stator. A partition plate one and a partition plate two are fixedly arranged on the inner wall of the housing at both ends of the slip ring. Multiple sets of carbon brush units are fixedly arranged between the partition plate one and the partition plate two. An external power supply is electrically connected to the stator, and the rotor drives the rotating shaft to rotate through a rotating magnetic field. An air inlet and an air outlet are formed at the two axial ends of the housing, respectively. When the fan blades rotate, the driving gas flows into the housing from the air inlet, flows through the air gap between the stator and the rotor, and the contact area between the carbon brushes and the slip ring, and then exits from the air outlet.

[0005] As an improvement to the above technical solution, the air inlet is located at one end of the housing near the rotor, and the air outlet is located at one end of the housing near the fan blade.

[0006] As an improvement to the above technical solution, an observation window is detachably provided on the housing and located at the slip ring position.

[0007] As an improvement to the above technical solution, multiple sets of carbon brush units are distributed in a ring array at equal intervals on the surface of the rotating shaft, and each set of carbon brush units consists of at least four carbon brushes.

[0008] The beneficial effects of this utility model are:

[0009] By integrating the slip ring into the motor, the toner is extracted from the motor using flow guide baffle one, flow guide baffle two, and air cooling to avoid short circuits. This completes the stripping of toner generated by the slip ring and solves the toner problem. After placing the slip ring inside the motor, the axial dimension is reduced by 15%-20%. The motor's internal cooling also cools the slip ring, reducing the loss of the external slip ring fan.

[0010] In terms of overall structure, the slip ring, rotor, fan, and built-in slip ring are designed together, which can save a lot of space, assembly time, reduce the temperature rise of the motor, and improve the overall performance of the motor. Attached Figure Description

[0011] Figure 1 This is a front view of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the internal airflow path of the motor of this utility model.

[0013] Reference numerals: 10, housing; 20, stator; 30, rotor; 40, carbon brush unit; 50, fan blade; 60, shaft; 70, partition 1; 80, partition 2; 90, slip ring. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] The wound-rotor motor structure with built-in slip ring includes a housing 10. A rotating shaft 60 is rotatably inserted into the housing 10 along its extension direction. A rotor 30, a slip ring 90, and a fan blade 50 are sequentially fixedly sleeved on the surface of the rotating shaft 60 along its axial direction. A stator 20 is fixed inside the housing 10 and outside the rotor 30, allowing the rotor 30 to rotate relative to the stator 20. A partition plate 70 and a partition plate 2 are respectively fixedly disposed on the inner wall of the housing 10 at both ends of the slip ring 90. 80. Multiple sets of carbon brush units 40 are fixedly arranged between the first partition 70 and the second partition 80. An external power supply is electrically connected to the stator 20, and the rotor 30 is driven to rotate the shaft 60 through the rotating magnetic field. An air inlet and an air outlet are formed at the two axial ends of the housing 10, respectively. When the fan blade 50 rotates, the driving gas flows into the housing 10 from the air inlet, flows through the air gap between the stator 20 and the rotor 30 in sequence, and the contact area between the carbon brush 40 and the slip ring 90, and is discharged from the air outlet.

[0016] Specifically, after an external power supply is connected to the stator 20 winding, the stator 20 generates a rotating magnetic field. Under the action of the rotating magnetic field, the rotor 30 drives the shaft 60 to rotate synchronously, realizing the output of mechanical energy. When the shaft 60 rotates, the slip ring 90 fixed on it rotates synchronously with the shaft 60. Multiple sets of carbon brush units 40 maintain sliding contact with the surface of the slip ring 90, forming a dynamic conductive path to realize the current input / output of the rotor winding. When the shaft 60 rotates, the fan blades 50 rotate synchronously, driving external gas to enter from the axial air inlet of the housing 10. The airflow path provides heat dissipation in stages.

[0017] First stage (stator-rotor heat dissipation): The airflow first flows through the air gap between stator 20 and rotor 30, carrying away the heat generated by the windings and core;

[0018] Second stage (carbon brush-collector ring heat dissipation): The airflow continues to flow through the contact area between the carbon brush unit 40 and the collector ring 90 between the partition 1 70 and the partition 2 80, cooling the heat generated by friction and current transmission, and at the same time carrying away the carbon powder generated between the carbon brush unit 40 and the collector ring 90.

[0019] The heated airflow is discharged from the air outlet of the housing 10, forming a heat dissipation cycle. The first partition 70 and the second partition 80 restrict the carbon brush unit 40 to both sides of the collector ring 90 axially, preventing carbon powder from spreading and contaminating the stator and rotor areas, while guiding the airflow to concentrate through the carbon brush contact area.

[0020] In one embodiment, the air inlet is located at one end of the housing 10 near the rotor 30, and the air outlet is located at one end of the housing 10 near the fan blade 50. External cold air preferentially enters the air gap between the stator 20 and the rotor 30, directly carrying away the heat between the winding and the iron core. Subsequently, driven by the fan blade 50, the airflow enters the area defined by the first partition 70 and the second partition 80, flows through the sliding contact part between the carbon brush unit 40 and the slip ring 90, and uses the cooling air path to draw carbon powder away from the motor, preventing carbon powder from diffusing into the stator-rotor area.

[0021] In one embodiment, an observation window is detachably provided on the housing 10 at the location of the slip ring 90. The observation window can be quickly removed when maintenance or repair of the slip ring 90 and the carbon brush unit 40 is required. Figure 1 As shown by the dashed line.

[0022] In one embodiment, multiple sets of carbon brush units 40 are arranged in a ring array with equal spacing on the surface of the rotating shaft 60. Each set of carbon brush units 40 consists of at least four carbon brushes. The multiple sets of carbon brush units 40 increase the contact area with the slip ring 90, increasing the current transmission path. When a set of carbon brushes or several carbon brushes have poor contact, the other carbon brushes can still ensure stable current transmission, avoiding abnormal motor operation due to single-point contact failure and ensuring stable current input / output of the rotor winding.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A structure of a wire-wound motor with a built-in collector ring, characterized by, The device includes a housing (10), within which a rotating shaft (60) is rotatably inserted. A rotor (30), a slip ring (90), and fan blades (50) are sequentially fixedly sleeved on the surface of the rotating shaft (60) along its axial direction. A stator (20) is fixed inside the housing (10) and outside the rotor (30), allowing the rotor (30) to rotate relative to the stator (20). A partition plate (70) and a partition plate (80) are fixedly disposed on the inner wall of the housing (10) at both ends of the slip ring (90). Multiple sets of carbon brush units (40) are fixedly arranged between the first partition (70) and the second partition (80). An external power supply is electrically connected to the stator (20), and the rotor (30) is driven by the rotating magnetic field to drive the rotating shaft (60) to rotate. An air inlet and an air outlet are formed at the two axial ends of the housing (10). When the fan blade (50) rotates, the driving gas flows into the housing (10) from the air inlet, flows through the air gap between the stator (20) and the rotor (30) in sequence, and the contact area between the carbon brush unit (40) and the collector ring (90) before being discharged from the air outlet.

2. The winder motor structure with a built-in collector ring according to claim 1, characterized in that: The air inlet is located at one end of the housing (10) near the rotor (30), and the air outlet is located at one end of the housing (10) near the fan blade (50).

3. The winder motor structure with a built-in collector ring according to claim 2, characterized in that: An observation window is detachably provided on the housing (10) at the position of the collector ring (90).

4. The winder motor structure with a built-in collector ring according to claim 2, characterized in that: Multiple sets of carbon brush units (40) are arranged in a ring array and are equally spaced on the surface of the rotating shaft (60). Each set of carbon brush units consists of at least four carbon brushes.

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