WO2023165249A1

WO2023165249A1 - Mining explosion-proof three-phase permanent magnet synchronous drum

Info

Publication number: WO2023165249A1
Application number: PCT/CN2022/143693
Authority: WO
Inventors: 张春晖; 黄小祥; 左成
Original assignee: 江苏嘉轩智能工业科技股份有限公司
Priority date: 2022-05-20
Filing date: 2022-12-30
Publication date: 2023-09-07
Also published as: CN114825835A

Abstract

The present invention relates to the technical field of permanent magnet synchronous drums, and particularly relates to a mining explosion-proof three-phase permanent magnet synchronous drum, comprising a stator assembly and an outer rotor, which is rotationally arranged on an outer peripheral surface of the stator assembly. The stator assembly comprises a stator core, and a bearing housing welding assembly and a bearing housing assembly, which are respectively arranged at two ends of the stator core, wherein wire slots are provided in an outer peripheral wall of the stator core, and the stator core is provided with air channels in an axial direction thereof; the bearing housing assembly is provided with a first vent, and the bearing housing welding assembly is provided with a second vent; and two ends of each air channel are in communication with the first vent and the second vent, respectively. When in use, the air intake amount at one end of the stator assembly is increased by omitting a spindle, such that the cooling of an apparatus is greatly improved, that is, the cooling efficiency is improved, thereby ensuring the cooling stability and reliability of the apparatus, and avoiding the problem of the cooling effect of an existing outer rotor drum being poor due to a central spindle of the outer rotor drum affecting the intake amount of cold air.

Description

Mining explosion-proof three-phase permanent magnet synchronous drum

technical field

The invention relates to the technical field of permanent magnet synchronous drums, in particular to a mine flameproof three-phase permanent magnet synchronous drum.

Background technique

The traditional outer rotor drum is equipped with a main shaft, and the two ends of the main shaft are provided with bearing housings through bearings. At the same time, ventilating openings are set on the main shaft and bearing housings. The air vents communicate with the stator inside the outer rotor drum. Because the equivalent diameter It is relatively small, so that the incoming cooling air is limited, which seriously affects the cooling of the outer rotor drum, and the long-term exposure of the outer rotor drum components to the high-temperature space will also affect the service life of the components.

Contents of the invention

The technical problem to be solved by the present invention is: in order to solve the problem that the existing outer rotor drum intermediate shaft affects the intake of cold air, resulting in poor cooling effect of the outer rotor drum, a mine explosion-proof three-phase permanent magnet is now provided Synchronize the rollers.

The technical solution adopted by the present invention to solve the technical problem is: a mining explosion-proof three-phase permanent magnet synchronous drum, including a stator assembly and an outer rotor that is rotated on the outer peripheral surface of the stator assembly, and the stator assembly includes a stator iron core and the bearing seat welding assembly and bearing seat assembly respectively arranged at both ends of the stator iron core, the outer peripheral wall of the stator iron core is provided with wire grooves, the stator iron core is provided with an air duct along its axial direction, and the bearing A first vent is provided on the seat assembly, a second vent is provided on the welding assembly of the bearing seat, the two ends of the air passage communicate with the first vent and the second vent respectively, and the stator assembly is provided with There is a fan, and the fan is used for inputting external cold air into the air duct through the first ventilating opening, and then exhausting it through the second ventilating opening. Compared with the existing technology, this solution increases the air intake at one end of the stator assembly by canceling the main shaft, which greatly improves the cooling of the equipment, thus improving the cooling efficiency and ensuring stable and reliable cooling of the equipment.

In order to improve the heat dissipation efficiency of the stator assembly, further, heat dissipation fins are arranged in the air duct. By arranging the heat dissipation fins in the air duct, the heat dissipation fins increase the heat dissipation area of the stator assembly, thereby improving the heat dissipation efficiency of the stator core.

Further, the heat dissipation fins are helically distributed along the axial direction of the stator core. The heat dissipation fins are arranged in a spiral shape, and the heat dissipation fins have a guiding effect on the cold air and the emitted hot air, so that the cold air and the hot air accelerate the vortex flow and increase the heat dissipation.

One of the implementation manners of the air duct is specifically: the air duct is arranged helically along the axial direction of the stator core. By arranging the air channel in a spiral structure, the air channel in the spiral structure has a guiding effect on the cooling air and the radiated heat, and accelerates the flow speed of the cooling air and the radiated heat in the entire air channel.

Another embodiment of the air duct is specifically: the air duct is arranged in a straight line along the axial direction of the stator core. The air duct is arranged in a straight-line structure, so that the heat can pass through smoothly, and the heat dissipation will not appear to accumulate and sluggish.

For the convenience of manufacture, further, the stator core is formed by stacking several punched sheet groups. The stator core is formed by superimposing the punching sheets, which is convenient for forming the stator core, and the length of the stator core needs to be adjusted according to the actual working conditions.

In order to better form the stator core, further, the punching set includes at least two stacked punching pieces, at least one of the punching pieces in the punching set is provided with a channel, and several stacked punching pieces The passages in the punching sheet group rotate in the same direction and communicate with each other to form air passages arranged helically on the stator core. Pass through the channel provided on the punching sheet, and the channels of the adjacent punching sheet rotate and stagger a certain angle to form a spiral heat dissipation air channel.

In order to facilitate the installation of heat dissipation fins according to the usage conditions, further, at least one of the punches in the set of punches is provided with inner fins, and the inner fins are arranged in the channel, and several stacked sets of punches The inner fins are rotated and staggered in the same direction to form heat dissipation fins spirally arranged on the stator core. At least one punch in the punch group is provided with an inner fin, so that two adjacent groups of punch groups can have inner fins arranged at intervals, or fins arranged continuously, and the fins are directed toward the same direction. Rotating and misaligning at a certain angle in one direction to form spirally arranged heat dissipation fins.

According to the installation method of one of the fans in the working condition, further, the fan is arranged on the bearing housing assembly and is located outside the stator assembly, and the stator assembly is provided with a shroud between the first ventilation opening and the air duct , the air deflector is used to guide the cooling air from the first vent into the air duct. The fan is installed outside the stator assembly, which is convenient for the staff to maintain during maintenance.

According to another fan installation method according to the working conditions, further, the fan is arranged on the welding assembly of the bearing seat, the fan is located in the stator core, and the impeller on the fan is located between the first vent and the air duct between. Due to the limited installation space such as underground, the size requirements of the equipment are relatively strict, and the fan is installed in the stator assembly, which makes the overall structure of the equipment compact and can be used in places with limited space.

The beneficial effects of the present invention are: when the flameproof three-phase permanent magnet synchronous drum for mining is used, the air intake at one end of the stator assembly is increased by canceling the main shaft, which greatly improves the cooling of the equipment, and also improves the cooling efficiency of the equipment. Efficiency ensures stable and reliable cooling of the equipment, and avoids the problem that the existing outer rotor drum intermediate spindle affects the intake of cold air, resulting in poor cooling effect of the outer rotor drum.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the three-dimensional structure schematic diagram of embodiment 1 in the present invention;

Fig. 2 is a schematic diagram of a half-section structure of Embodiment 1 in the present invention;

Fig. 3 is a three-dimensional structural schematic diagram of a stator assembly in Embodiment 1 of the present invention;

Fig. 4 is the front view of the stator assembly in Embodiment 1 of the present invention;

Fig. 5 is a left view of the stator assembly in Embodiment 1 of the present invention;

Fig. 6 is a right view of the stator assembly in Embodiment 1 of the present invention;

Fig. 7 is A-A sectional view among Fig. 6;

Fig. 8 is a three-dimensional structural schematic diagram of the stator core in Embodiment 1 of the present invention;

Fig. 9 is a partially enlarged view of B in Fig. 8;

Fig. 10 is a front view of the stator core in Embodiment 1 of the present invention;

Fig. 11 is the front view of the punched sheet in Embodiment 1 of the present invention;

Fig. 12 is a top view of the punched sheet in Embodiment 1 of the present invention;

Fig. 13 is a schematic diagram of a three-dimensional structure of Embodiment 4 of the present invention;

Fig. 14 is the front view of embodiment 4 in the present invention;

Fig. 15 is the left view of embodiment 4 in the present invention;

Fig. 16 is the right view of embodiment 4 in the present invention;

Fig. 17 is a C-C sectional view in Fig. 15;

Fig. 18 is a front view of the stator core in Embodiment 2 of the present invention;

Fig. 19 is a D-D sectional view in Fig. 18;

Fig. 20 is a left view of the stator core in Embodiment 2 of the present invention;

Fig. 21 is a three-dimensional structural schematic diagram of the stator core in Embodiment 2 of the present invention;

Figure 22 is a schematic diagram of a three-dimensional structure of Embodiment 3 of the present invention;

Fig. 23 is a front view of Embodiment 3 of the present invention.

In the figure: 1. Stator assembly, 2. Outer rotor, 3. Stator core, 4. Welding assembly of bearing housing, 5. Bearing housing assembly, 6. Wire groove, 7. Air duct, 8. First air vent, 9 , the second air vent, 10, cooling fins, 11, punching fins, 12, channel, 13, inner fins, 14, shroud, 15, cylinder, 16, first bearing seat, 17, wiring tube, 18, the second bearing block, 19, fan, 20, fixed seat, 21, windshield cylinder barrel.

Detailed ways

The present invention is described in further detail below in conjunction with embodiment:

The present invention is not limited to the following specific embodiments. Those skilled in the art can implement the present invention in various other specific embodiments according to the disclosed content of the present invention, or make simple changes or All changes fall within the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

Example 1

As shown in Figure 1-12, a flameproof three-phase permanent magnet synchronous drum for mines includes a stator assembly 1 and is installed on the outer peripheral surface of the bearing seat welding assembly 4 and the bearing seat assembly 5 at both ends of the stator assembly 1 through bearing rotation. The outer rotor 2 of the stator assembly 1 includes a stator core 3 and a bearing seat welding assembly 4 and a bearing seat assembly 5 respectively arranged at both ends of the stator iron core 3, and a wire groove 6 is provided on the outer peripheral wall of the stator iron core 3 , the stator core 3 is provided with an air duct 7 along its axial direction, the bearing seat assembly 5 is provided with a first air vent 8, and the bearing seat welding assembly 4 is provided with a second air vent 9, so Both ends of the air duct 7 communicate with the first vent 8 and the second vent 9 respectively, and the stator assembly 1 is provided with a fan 19 for inputting external cold air through the first vent 8 To the air duct 7, and then discharged through the second vent 9. Both the bearing seat welding assembly 4 and the bearing seat assembly 5 are equipped with a fixing seat 20 , and a windshield cylinder 21 is arranged between the stator core 3 and the bearing seat assembly 5 . The bearing seat welding assembly 4 includes a cylinder 15, a first bearing seat 16 and a wiring tube 17, the wiring tube 17 is fixed on the first bearing seat 16, the cylinder 15 is fixedly connected to one end of the first bearing seat 16, and the first bearing seat 16 is provided with a first vent 8 and communicates with the cylinder 15, the stator core 3 is sleeved on the cylinder 15, the bearing seat assembly 5 includes a second bearing seat 18, and a second ventilation port 18 is provided on the second bearing seat 18. The port 9 and the cylinder 15 extend toward the first bearing seat 16, that is, the first vent 8 of the first bearing seat 16 communicates with the cylinder 15, and the first bearing seat 16 is fixed on the The end of the stator core 3 away from the second bearing seat 18, the air channel 7 is located between the first vent 8 and the second vent 9, when cooling, the cooling air passes through the second vent 9 on the second bearing seat 18 Enter, and pass between the windshield cylinder 21 and the cylinder 15, and then enter the air duct 7 of the stator core 3, the air duct 7 arranged spirally in the air duct 7 speeds up the flow velocity of the air, while the air duct 7 arranged spirally The cooling fins 10 also guide and accelerate the air, and then discharge it through the first vent 8 on the first bearing seat 16 .

Radiating fins 10 are arranged in the air duct 7 , and the cooling fins 10 are helically distributed along the axial direction of the stator core 3 .

The air duct 7 is arranged spirally along the axial direction of the stator core 3 . The air duct 7 is a plurality of notches provided on the inner peripheral wall of the stator core 3, and the plurality of notches are evenly distributed along the circumference.

The stator core 3 is formed by stacking a number of stamping groups. The punching set includes two overlapping punching sheets 11, one of the punching sheets 11 in the punching set is provided with a channel 12, and the channels 12 in several stacked punching sets are along the same direction Rotate and communicate with each other to form the air duct 7 spirally arranged on the stator core 3 .

One of the punches 11 in the punching group is provided with an inner fin 13, and the inner fin 13 is arranged in the channel 12, and the inner fins 13 in the plurality of stacked punching groups are along the same direction The heat dissipation fins 10 arranged spirally on the stator core 3 are formed by staggering rotation. Here the punching group can be composed of four punching sheets 11, or more punching sheets 11. In this punching group, two, three or four punching sheets 11 are provided with channels 12. Inner fins 13 are arranged on two, three or four punches 11 in this punch group.

The fan 19 is arranged on the bearing seat assembly 5 and is located outside the stator assembly 1, and the stator assembly 1 is provided with a shroud 14 between the first vent 8 and the air duct 7, and the shroud 14 is used for The cooling air is guided into the air duct 7 through the first vent 8 .

When the above flameproof three-phase permanent magnet synchronous drum for mining is in use, heat dissipation fins 10 are added inside the stator core 3, and the stamping piece 11 is formed by one stamping, which reduces the welding process, increases heat dissipation by the heat dissipation fins 10, and cancels the The thermal resistance generated by the cooperation between the original stator core 3 and the steel cylinder is compared with the original solution, which is direct cooling, and the heat dissipation area is much larger than the original one. The equivalent diameter is larger, and the ventilation volume is doubled. Therefore, multiple optimizations are integrated, and the heat dissipation performance is expected to increase by 15-25%. The air duct 7 is set on the stator core 3 and the overall temperature without the heat dissipation fins 10 is stable at 63.18°. Further, the overall temperature of the heat dissipation fins 10 is set in the air duct 7 of the stator core 3 of the prior art and is stabilized at 60.58°. °, the overall temperature of the air channel 7 spiral on the stator core 3 without cooling fins 10 is stable at 58 °, the overall temperature of the stator core 3 upper air channel 7 spiral and with cooling fins 10 is stable at 55 °, and the heat dissipation effect is obvious In addition, the overall components are formed by one-time casting, which is convenient for mass production, shortens the processing cycle, and greatly improves the overall material turnover rate.

Example 2

Embodiment 2 is one of the structures of the air duct 7, specifically: as shown in Figures 18-21, the air duct 7 is arranged in a straight line along the axial direction of the stator core 3, and there are cooling fins in the air duct 7 10. The air duct 7 arranged in a straight line is equivalent to the straight hole opened on the stator core 3 to ensure the smooth heat dissipation of the air duct 7 without heat accumulation and sluggish phenomenon, and under the action of the cooling fins 10, the heat dissipation area is increased , improved heat dissipation.

Example 3

Embodiment 3 is another structure of the air duct 7, specifically: as shown in Figure 22-23, the air duct 7 is arranged in a straight line along the axial direction of the stator core 3, and there is no cooling fin in the air duct 7 10. The air ducts 7 arranged in a row are equivalent to the straight holes provided on the stator core 3 to ensure that the heat of the air ducts 7 can be dissipated smoothly without heat accumulation and sluggishness.

Example 4

Embodiment 4 is the structure of the fan 19 in another working condition, specifically: as shown in Figure 13-17, when the space in the mine or other work is limited, the fan 19 is arranged on the bearing housing welding assembly 4 Above, the fan 19 is located in the stator core 3 , and the impeller on the fan 19 is located between the first vent 8 and the air duct 7 . The cylinder 15 of the first bearing seat 16 is fixedly connected with a mounting seat, the fan 19 here is a centrifugal fan 19, and the fixed flange on the centrifugal fan 19 is fixed on the mounting seat by screws to block the cylinder 15, Its overall structure is compact.

The above-mentioned ideal embodiment according to the present invention is an inspiration. Through the above-mentioned description, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims

A flameproof three-phase permanent magnet synchronous drum for mining, comprising a stator assembly (1) and an outer rotor (2) that is rotatably arranged on the outer peripheral surface of the stator assembly (1), characterized in that: the stator assembly (1) It includes a stator core (3) and a bearing seat welding assembly (4) and a bearing seat assembly (5) respectively arranged at both ends of the stator iron core (3), and a wire groove ( 6), the stator core (3) is provided with an air duct (7) along its axial direction, the bearing seat assembly (5) is provided with a first air vent (8), and the bearing seat welding assembly ( 4) is provided with a second vent (9), the two ends of the air duct (7) communicate with the first vent (8) and the second vent (9) respectively, the stator assembly (1) A fan (19) is provided, and the fan (19) is used for inputting external cold air from the first vent (8) to the air duct (7), and then exhausting it through the second vent (9).
The mine flameproof three-phase permanent magnet synchronous drum according to claim 1, characterized in that: the air duct (7) is provided with cooling fins (10).
The explosion-proof three-phase permanent-magnet synchronous drum for mining according to claim 2, characterized in that: the heat dissipation fins (10) are spirally distributed along the axial direction of the stator core (3).
The mine flameproof three-phase permanent magnet synchronous drum according to any one of claims 1-3, characterized in that: the air duct (7) is spirally arranged along the axial direction of the stator core (3).
The explosion-proof three-phase permanent magnet synchronous drum for mining according to any one of claims 1-3, characterized in that the air ducts (7) are arranged in a straight line along the axial direction of the stator core (3).
The explosion-proof three-phase permanent-magnet synchronous drum for mining according to claim 1, characterized in that: the stator core (3) is formed by stacking several stamping groups.
The explosion-proof three-phase permanent magnet synchronous drum for mines according to claim 6, characterized in that: the punching set includes at least two stacked punches (11), and at least one of the punching sets is One of the punches (11) is provided with a passage (12), and the passages (12) in several stacked sets of punches rotate in the same direction and communicate with each other to form a spirally arranged air duct on the stator core (3) (7).
The flameproof three-phase permanent magnet synchronous drum for mining according to claim 7, characterized in that: at least one of the punches (11) in the punch group is provided with an inner fin (13), the The inner fins (13) are arranged in the channel (12), and the inner fins (13) in the stacked punching groups are rotated and staggered in the same direction to form a heat dissipation spiral arranged on the stator core (3). Fins (10).
The mine flameproof three-phase permanent magnet synchronous drum according to claim 1, characterized in that: the fan (19) is arranged on the bearing seat assembly (5) and is located outside the stator assembly (1), and the stator A wind deflector (14) is arranged on the component (1) between the first air vent (8) and the air duct (7), and the wind deflector (14) is used to pass the cooling air through the first air vent (8) Lead into the air duct (7).
The mine flameproof three-phase permanent magnet synchronous drum according to claim 1, characterized in that: the fan (19) is arranged on the bearing seat welding assembly (4), and the fan (19) is located on the stator core In (3), the impeller on the fan (19) is located between the first vent (8) and the air duct (7).