A forced air cooling motor provided with a cross type cooling air path

Abstract

The application relates to a motor, in particular to a forced air-cooled motor, in particular to a forced air-cooled motor provided with a cross type cooling air path. In order to solve the problem that the cooling air paths of the existing forced air-cooled motor have a large difference in cooling effect at two ends, a forced air-cooled motor provided with a cross type cooling air path is provided, the left end ventilation pipe and the right end ventilation pipe arranged at the stator are structured, the flowing directions of the cooling air of the two adjacent stator axial ventilation holes at the stator are opposite, and the difference in cooling effect at the two ends of the stator is reduced; meanwhile, the air guide device is arranged at the rotor, the flowing directions of the cooling air of the two adjacent rotor axial ventilation holes at the rotor are opposite, the cooling effect at the rotor is improved, the difference in cooling effect at the two ends of the rotor is reduced, the phenomenon that the temperature difference at the two ends of the existing forced air-cooled motor is large is solved, and the cooling effect of the forced air-cooled motor is improved as a whole.

Description

Technical Field

[0001] This invention relates to an electric motor, and more particularly to a forced air-cooled motor, specifically a forced air-cooled motor with a cross-type cooling airflow path. Background Technology

[0002] Modern electric motors employ higher electromagnetic loads to improve material utilization, and the single-unit capacity of motors is also increasing. However, this increased electromagnetic load leads to a problem: motor temperature rise. This temperature rise not only increases coil resistance, leading to higher losses and reduced efficiency, but can also cause motor burnout, posing a safety hazard. Therefore, efficient motor cooling has become an important research direction.

[0003] Classifying motor cooling systems based on the cooling medium is convenient. Currently, the most widely used cooling system in motor manufacturing is the air cooling system, which uses air as the cooling medium. Air-cooled motors are generally simple in structure and low in cost, but their cooling effect is relatively poor. To improve the cooling effect of air-cooled motors, a suitable cooling circuit needs to be designed according to the specific characteristics of the motor.

[0004] In electric motors, the frame and stator / rotor sections are among the main areas for heat dissipation, and these are the primary targets for cooling in air-cooled motors. Existing forced air-cooled motors employ cooling airflow paths such as... Figure 1 As shown, air is blown into the motor from the air inlet of the frame 1, and then splits into two paths: one path passes through the air duct on the frame to directly cool the outer surface of the stator 3; the other path passes through the rotor axial ventilation hole 17 of the rotor 4 to carry away the heat of the rotor 4. Finally, the two paths merge and are discharged from the motor through the ventilation hole of the left end cover, dissipating the heat into the surrounding air. This cooling air path structure cools the stator surface and the inside of the rotor by air exiting through the left end cover. However, this unidirectional ventilation structure has a certain cooling effect on the left end of the stator and rotor because the air flowing through the left end of each stator and rotor has already absorbed a certain amount of heat from their respective right ends. That is, the cooling air coming in from the air inlet of the frame first flows through the right end of the stator surface and the inside of the rotor, absorbing the heat from the right end of the stator surface and rotor, and then cools the left end of the stator and rotor. Therefore, the cooling effect on the left end of the stator and rotor will be reduced, and in some special motors, it cannot meet the cooling requirements. Summary of the Invention

[0005] In order to solve the problem that the cooling effect of the two ends of the existing forced air-cooled motor is significantly different, the present invention provides a forced air-cooled motor with a cross-type cooling air path.

[0006] This invention is achieved using the following technical solution: A forced-air-cooled motor with a cross-type cooling airflow path includes a cylindrical frame, a rotating shaft, a stator, a rotor, a left end cover and a right end cover that respectively mate with both ends of the frame. The frame has an air inlet. The stator is punched with multiple circumferentially distributed first stator axial ventilation holes and second stator axial ventilation holes, spaced apart. Multiple left-end ventilation pipes are installed between the left end of the stator and the left end cover. One end of each left-end ventilation pipe is connected to the left end of each of the first stator axial ventilation holes. The left end cover has multiple left-end stator ventilation holes, and the other end of each left-end ventilation pipe is connected to the left end of each of the first stator axial ventilation holes. The right end of the stator is connected to the right end cover. Multiple right-end ventilation pipes are installed between the end covers. One end of each right-end ventilation pipe is connected to the right end of a number of second stator axial ventilation holes. Multiple right-end stator ventilation holes are provided on the right end cover, and the other end of each right-end ventilation pipe is connected to a number of right-end stator ventilation holes. A left air guide and a right air guide are respectively provided between the left end of the rotor and the left end cover, and between the right end of the rotor and the right end cover (as is known to those skilled in the art, the left and right air guides do not contact the end covers, nor can they contact them, because the air guides are to be fixed to the rotating shaft, which rotates, while the end covers cannot rotate with the shaft). Both air guides include a small cylinder fixed to the rotating shaft and a large cylinder outer sleeved on the small cylinder. The inner edge of the large cylinder (inner edge) The end, i.e., the side end near the axial center, such as the inner end of the large cylinder in the left-side air guide (i.e., the right side of the large cylinder), and the inner end of the large cylinder in the right-side air guide (i.e., the left side of the large cylinder), is aligned with the inner edge of the small cylinder. A ring plate is fixedly connected between the inner edges of the large and small cylinders. The outer edge of the large cylinder is located axially outside the outer edge of the small cylinder (i.e., the axial length of the large cylinder is greater than the axial length of the small cylinder). A frustum-shaped air guide is fixedly connected between the outer edges of the large and small cylinders. Multiple air guides are evenly distributed circumferentially on the wall of the large cylinder. Adjacent air guides... A certain width is left between the air outlets. Each air inlet is provided on the ring plate at the position corresponding to each air guide, and each air outlet is provided on the ring plate at the position corresponding to each air guide. There is a partition between the air inlet space enclosed by the large and small cylinders corresponding to each set of air inlets and the air outlet space enclosed by the large and small cylinders corresponding to each set of air outlets. The rotor is provided with rotor axial ventilation holes at both ends (here, "its" refers to the rotor axial ventilation hole), which are respectively connected to the air inlet and air outlet holes on the air guides on both sides. Each air guide has an air outlet on the air guide tube corresponding to the air outlet space of each air guide. The left end cover is provided with a left end rotor ventilation hole corresponding to the air outlet of the left air guide, and the right end cover is provided with a right end rotor ventilation hole corresponding to the air outlet of the right air guide.

[0007] Working principle: After the cooling air enters through the air inlet of the machine base, it splits into two paths, each flowing towards one side of the machine base. One path is further divided into two parts: one part enters from the right end of the first stator axial ventilation hole, exits from the left end of the first stator axial ventilation hole, passes through the left end ventilation pipe, and exits from the left end stator ventilation hole on the left end cover. The other part enters through the air guide port of the right air guide, and then sequentially passes through the air inlet space of the air guide, the air inlet hole, the corresponding rotor axial ventilation hole, and the left air guide. After exiting through the outlet, the air is discharged from the left rotor ventilation hole on the left end of the left end cover. The other cooling air path is also divided into two parts. One part of the cooling air enters from the left end of the second stator axial ventilation hole, then exits from the right end of the second stator axial ventilation hole, passes through the right end ventilation pipe, and exits from the right end stator ventilation hole on the right end cover. The other part of the cooling air enters through the air guide port of the left air guide, then passes through the air inlet of the left air guide, the corresponding rotor axial ventilation hole, and the air outlet of the right air guide in sequence, and exits from the right end rotor ventilation hole on the right end cover.

[0008] Stator cooling: In one stator cooling air path, the cooling air enters from the right end of the stator through the first stator axial ventilation hole and exits from the left end. In the other stator cooling air path, the cooling air enters from the left end of the stator through the second stator axial ventilation hole and exits from the right end. The two cooling air paths flow in opposite directions, which means that the cooling air flows in opposite directions through the first and second stator axial ventilation holes. The second and first stator axial ventilation holes are arranged alternately, which to some extent avoids the problem of large differences in cooling effect between the two ends of the stator, thereby improving the cooling effect of the stator.

[0009] Rotor cooling: In one rotor cooling air path, the cooling air enters from the air inlet of the right air guide, then passes through the air inlet of the right air guide, the corresponding rotor axial ventilation hole, and the air outlet of the left air guide, before exiting through the rotor ventilation hole at the left end of the left end cover. In the other rotor cooling air path, the cooling air enters from the air inlet of the left air guide, then passes through the air inlet of the left air guide, the corresponding rotor axial ventilation hole, and the air outlet of the right air guide, before exiting through the rotor ventilation hole at the right end of the right end cover. This results in the two cooling air paths flowing in opposite directions. Because there is a partition between the air inlet and outlet spaces of the air guides on both sides, the problem of a large difference in cooling effect between the two ends of the rotor is avoided to a certain extent, thereby improving the cooling effect of the rotor.

[0010] Furthermore, a flow-diverting ring plate is installed at the axial center of multiple right-end ventilation pipes and left-end ventilation pipes. The flow-diverting ring plate has multiple through holes for the right-end or left-end ventilation pipes to pass through, and the outer edge of the flow-diverting ring plate is inclined outward (as is known to those skilled in the art, junction boxes are provided at the upper and lower ends of the machine base. Since the power line terminal blocks need to be led out at the positions of the left-end and right-end ventilation pipes corresponding to the junction boxes, there is not much space to install a flow-diverting ring plate. Therefore, in actual use, the flow-diverting ring plate is not a complete circle, but is broken). Without the flow-diverting ring plate, the stator coil will block part of the cooling air flowing into the rotor. In this way, most of the cooling air will flow directly into the stator, resulting in less airflow at the rotor. With the addition of the flow-diverting ring plate, the cooling air will be partially blocked by the flow-diverting ring plate, forcing the blocked part of the cooling air to flow into the rotor, thereby balancing the airflow at the rotor and stator and improving the overall cooling effect of the motor.

[0011] Furthermore, both the left and right end covers have end cover air guide ring plates on their inner walls, which are clearance-fitted with the outer ends of the outer walls of the air guides. These end cover air guide ring plates allow cooling air from the air outlets in the air guides to flow more effectively from the left or right rotor ventilation holes. Multiple stiffeners are fixed to the inner walls of the end cover air guide ring plates to divide the space within the plate into multiple air outlet channels. The multiple left and right rotor ventilation holes are each connected to one of the multiple air outlet channels on both sides. This structure not only increases the mechanical strength of the left or right end cover to a certain extent but also standardizes the ventilation structure at the left and right end covers.

[0012] The beneficial effects of this invention are as follows: By using the structure of the left-end ventilation pipe and the right-end ventilation pipe at the stator, the cooling airflow directions of the two adjacent stator axial ventilation holes at the stator are opposite, which improves the cooling effect at the stator and reduces the difference in cooling effect between the two ends of the stator; at the same time, by using the ingenious structure of the air guide at the rotor, the cooling airflow directions of the two adjacent sets of rotor axial ventilation holes at the rotor (for ease of description, it is defined as: the rotor axial ventilation hole corresponding to each set of air outlets on the air guide is a set of rotor axial ventilation holes) are opposite, which improves the cooling effect at the rotor, reduces the difference in cooling effect between the two ends of the rotor, solves the problem of large temperature difference at the two ends of the existing forced air-cooled motor, and improves the overall cooling effect of the forced air-cooled motor. Attached Figure Description

[0013] Figure 1 A schematic diagram of the cooling airflow path for an existing forced air-cooled motor;

[0014] Figure 2 This is a cross-sectional structural diagram of the forced air-cooled motor with a cross-type cooling airflow path according to the present invention.

[0015] Figure 3 This is a schematic diagram of the cooling air path of the forced air-cooled motor of the present invention;

[0016] Figure 4 This is a three-dimensional schematic diagram of the assembly structure of the stator, rotor, and shaft of the forced air-cooled motor of the present invention;

[0017] Figure 5 This is a three-dimensional structural diagram of the air guide.

[0018] In the diagram: 1—Frame, 2—Shaft, 3—Stator, 4—Rotor, 5—Left end cover, 6—Right end cover, 7—Frame air inlet, 8—First stator axial ventilation hole, 9—Second stator axial ventilation hole, 10—Left end ventilation pipe, 11—Left end stator ventilation hole, 12—Right end ventilation pipe, 13—Right end stator ventilation hole, 1401—Left air guide, 1402—Right air guide, 141—Large cylinder, 142—Small cylinder, 143—Air guide pipe, 144—Air guide port, 145—Air outlet, 15—Left end rotor ventilation hole, 16—Right end rotor ventilation hole, 17—Rotor axial ventilation hole, 18—Flow divider ring plate, 19—End cover air guide ring plate. Detailed Implementation

[0019] like Figures 2 to 5As shown, a forced-air-cooled motor with a cross-type cooling airflow includes a cylindrical frame 1, a rotating shaft 2, a stator 3, a rotor 4, a left end cover 5 and a right end cover 6 that respectively mate with both ends of the frame 1. The frame 1 is provided with a frame air inlet 7. The stator 3 is punched with a plurality of circumferentially distributed first stator axial ventilation holes 8 and second stator axial ventilation holes 9. The first stator axial ventilation holes 8 and second stator axial ventilation holes 9 are arranged at intervals. A plurality of left-end ventilation pipes 10 are installed between the left end of the stator 3 and the left end cover 5. One end of the plurality of left-end ventilation pipes 10 is connected to a plurality of first stator axial ventilation holes 9. The left ends of the stator axial ventilation holes 8 are connected one-to-one. The left end cover 5 is provided with multiple left end stator ventilation holes 11. The other ends of multiple left end ventilation pipes 10 are connected one-to-one with the multiple left end stator ventilation holes 11. Multiple right end ventilation pipes 12 are installed between the right end of the stator 3 and the right end cover 6. One end of multiple right end ventilation pipes 12 is connected one-to-one with the right end of multiple second stator axial ventilation holes 9. The right end cover 6 is provided with multiple right end stator ventilation holes 13. The other ends of multiple right end ventilation pipes 12 are connected one-to-one with the multiple right end stator ventilation holes 13.A left air guide 1401 and a right air guide 1402 are respectively provided between the left end of the rotor 4 and the left end cover 5, and between the right end of the rotor 4 and the right end cover 6. (As is known to those skilled in the art, the left air guide 1401 and the right air guide 1402 do not contact the end cover, nor can they contact it, because the air guides are to be fixed on the rotating shaft 2, the rotating shaft 2 is to rotate, and the end cover cannot rotate with the rotating shaft 2). Both air guides include a small cylinder 142 fixed on the rotating shaft 2 and a large cylinder 141 sleeved on the small cylinder 142. The inner edge of the large cylinder 141 (the inner edge is close to the axial center) One side end of the large cylinder 141 in the left-side air guide is aligned with the inner edge of the small cylinder 142. A ring plate is fixedly connected between the inner edge of the large cylinder 141 and the inner edge of the small cylinder 142. The outer edge of the large cylinder 141 is located axially outside the outer edge of the small cylinder 142. The axial length of the large cylinder 141 is greater than that of the small cylinder 142. A frustum-shaped air guide duct 143 is fixedly connected between the outer edge of the large cylinder 141 and the outer edge of the small cylinder 142. Multiple air guide ports 144 are evenly distributed circumferentially on the wall of the large cylinder 141. A certain width is left between two adjacent air guide ports 144. A set of air inlets is provided at the position corresponding to each air guide port 144 on the ring plate, and a set of air outlets is provided at the position corresponding to each air guide port 144 on the other side of the ring plate. The air intake space enclosed by the large cylinder 141 and the small cylinder 142 corresponding to each adjacent set of air inlets is connected to the air guide port 142. A partition is provided between the air outlet space enclosed by the large cylinder 141 and the small cylinder 142 corresponding to the air outlet holes. The rotor 4 has rotor axial ventilation holes 17 at both ends (here, "its" refers to the rotor axial ventilation holes 17), which communicate with the air inlet and outlet holes on the air guides on both sides, respectively. Each air guide duct 143 corresponding to the air outlet space of each air guide has an air outlet 145. The left end cover 5 has a left-end rotor ventilation hole 15 corresponding to the air outlet 145 of the left air guide 1401, and the right end cover 6 has a right-end rotor ventilation hole 16 corresponding to the air outlet 145 of the right air guide 1402.

[0020] Working principle: After the cooling air enters through the air inlet 7 of the base, it is divided into two paths, and the two cooling air flows towards the two sides inside the base 1 respectively. One cooling air path is divided into two parts. One part of the cooling air enters from the right end of the first stator axial ventilation hole 8, then exits from the left end of the first stator axial ventilation hole 8, passes through the left end ventilation pipe 10, and is discharged from the left end stator ventilation hole 11 on the left end cover 5. The other part of the cooling air enters through the air guide port 144 of the right air guide 1402, and then passes through the air inlet space of the air guide, the air inlet hole, the corresponding rotor axial ventilation hole 17, and the air outlet 145 of the left air guide 1401 in sequence. After cooling, the air is discharged from the left rotor ventilation hole 15 on the left end cover 5. The other cooling air path is also divided into two parts. One part of the cooling air enters from the left end of the second stator axial ventilation hole 9, then exits from the right end of the second stator axial ventilation hole 9, passes through the right end ventilation pipe 12, and then exits from the right end stator ventilation hole 13 on the right end cover 6. The other part of the cooling air enters through the air guide port 144 of the left air guide 1401, then passes through the air inlet of the left air guide 1401, the corresponding rotor axial ventilation hole 17, and the air outlet 145 of the right air guide 1402 in sequence, and then exits from the right end rotor ventilation hole 16 on the right end cover.

[0021] Cooling of stator 3: In one cooling air path of stator 3, the cooling air enters from the right end of stator 3 through the first stator axial ventilation hole 8 and exits from the left end. In the other cooling air path of stator 3, the cooling air enters from the left end of stator 3 through the second stator axial ventilation hole 9 and exits from the right end. The flow directions of the two cooling air paths are opposite, which makes the flow directions of the cooling air through the first stator axial ventilation hole 8 and the second stator axial ventilation hole 9 opposite. The second stator axial ventilation hole 9 and the first stator axial ventilation hole 8 are arranged alternately, which to a certain extent avoids the problem of large difference in cooling effect between the two ends of stator 3, thereby improving the cooling effect of stator 3.

[0022] Cooling of rotor 4: The cooling air in one path of rotor 4 enters from the air inlet 144 of the right air guide 1402, then passes through the air inlet of the right air guide 1402, the corresponding rotor axial ventilation hole 17, and the air outlet 145 of the left air guide 1401, and then exits from the left end rotor ventilation hole 15 of the left end cover 5. The cooling air in the other path of rotor 4 enters from the air inlet 144 of the left air guide 1401, then passes through the air inlet of the left air guide 1401, the corresponding rotor axial ventilation hole 17, and the air outlet 145 of the right air guide 1402, and then exits from the right end rotor ventilation hole 16 of the right end cover. This makes the flow directions of the two cooling air paths of rotor 4 opposite. Since there is a partition between the air inlet space and the air outlet space of the air guides on both sides, the problem of large difference in cooling effect between the two ends of rotor 4 is avoided to a certain extent, thereby improving the cooling effect of rotor 4.

[0023] In specific implementation, a diversion ring plate 18 is installed at the axial center of multiple right-end ventilation pipes 12 and left-end ventilation pipes 10. The diversion ring plate 18 is provided with multiple through holes for the right-end ventilation pipe 12 or the left-end ventilation pipe 10 to pass through, and the outer edge of the diversion ring plate 18 is inclined outward (as is known to those skilled in the art, junction boxes are provided at the upper and lower ends of the base 1. Since the power line terminal block needs to be led out at the position of the left-end ventilation pipe 10 and the right-end ventilation pipe 12 corresponding to the junction box, there is not much position and space to install the diversion ring plate 18. Therefore, in actual use, the diversion ring plate 18 is not a complete circle, but is broken). Without the shunt ring plate 18, the stator 3 coil would block some of the cooling air flowing into the rotor 4. As a result, most of the cooling air would flow directly into the stator 3, reducing the airflow at the rotor 4. With the shunt ring plate 18 added, the cooling air will be partially blocked by the shunt ring plate 18, forcing the blocked part of the cooling air to flow into the rotor 4, thereby balancing the airflow at the rotor 4 and stator 3 and improving the overall cooling effect of the motor.

[0024] In specific implementation, the inner walls of the left end cover 5 and the right end cover 6 are provided with end cover air guide ring plates 19 that are clearance-fitted with the outer end of the outer wall of the air guide (the clearance fit means that there is a gap between the two and they do not contact each other). The end cover air guide ring plates 19 are designed to allow the cooling air at the air outlet 145 in the air guide to flow out better from the left end rotor ventilation hole 15 or the right end rotor ventilation hole 16. The inner wall of the end cover air guide ring plates 19 is fixed with multiple ribs that divide the space inside the end cover air guide ring plates 19 into multiple air outlet channels. The multiple left end rotor ventilation holes 15 and the right end rotor ventilation holes 16 are respectively connected to the multiple air outlet channels on both sides. This structure not only increases the mechanical strength of the left end cover 5 or the right end cover 6 to a certain extent, but also standardizes the ventilation structure at the left end cover 5 and the right end cover 6.

[0025] In this specific embodiment, one set of air inlets has at least one air inlet, and one set of air outlets has at least one air outlet. Alternatively, one set of air inlets may have three air inlets, and one set of air outlets may have three air outlets, making the structure more specific and rational. The cross-section of the air outlets 145 on the left air guide 1401 and the right air guide 1402 is a triangle with rounded corners, and the three air outlets are located at the three corners of the air outlet 145. There are five air guides 144. There are ten rotor ventilation holes 15 on the left end and ten rotor ventilation holes 16 on the right end. The base 1 has two base air inlets 7; in actual use, only one of the base air inlets 7 needs to be used, but two are provided to accommodate different actual installation positions.

Claims

1. A forced-air-cooled motor with a cross-type cooling airflow path, comprising a cylindrical frame (1), a rotating shaft (2), a stator (3), a rotor (4), a left end cover (5) and a right end cover (6) respectively cooperating with both ends of the frame (1), and an air inlet (7) on the frame (1), characterized in that, The stator (3) is punched with multiple circumferentially distributed first stator axial ventilation holes (8) and second stator axial ventilation holes (9). The first stator axial ventilation holes (8) and the first stator axial ventilation holes (9) are arranged at intervals. Multiple left-end ventilation pipes (10) are installed between the left end of the stator (3) and the left end cover (5). One end of the multiple left-end ventilation pipes (10) is connected to the left end of the multiple first stator axial ventilation holes (8) in a one-to-one correspondence. Multiple left-end stator ventilation holes (11) are provided on the left end cover (5). The other end of the multiple left-end ventilation pipes (10) is connected to the multiple left-end stator ventilation holes (11) in a one-to-one correspondence. Multiple right-end ventilation pipes (12) are installed between the right end of the stator (3) and the right end cover (6). One end of the end ventilation pipe (12) is connected to the right end of a plurality of second stator axial ventilation holes (9) in a corresponding manner. The right end cover (6) is provided with a plurality of right end stator ventilation holes (13). The other end of the plurality of right end ventilation pipes (12) is connected to a plurality of right end stator ventilation holes (13) in a corresponding manner. A left air guide (1401) and a right air guide (1402) are respectively provided between the left end of the rotor (4) and the left end cover (5) and between the right end of the rotor (4) and the right end cover (6). Both air guides include a small cylinder (142) fixed on the rotating shaft (2) and a large cylinder (141) sleeved on the small cylinder (142). The inner edge of the large cylinder (141) is aligned with the inner edge of the small cylinder (142). Furthermore, an annular plate is fixedly connected between the inner edge of the large cylindrical body (141) and the inner edge of the small cylindrical body (142). The outer edge of the large cylindrical body (141) is located axially outside the outer edge of the small cylindrical body (142). A frustum-shaped air guide tube (143) is fixedly connected between the outer edge of the large cylindrical body (141) and the outer edge of the small cylindrical body (142). Multiple air guide ports (144) are evenly distributed circumferentially on the cylindrical wall of the large cylindrical body (141). A certain width is left between two adjacent air guide ports (144). A set of air inlets is provided at the position corresponding to each air guide port (144) on the annular plate. A set of air outlets is provided at the position not corresponding to each air guide port (144) on the annular plate. A partition is provided between the air inlet space enclosed by the large cylinder (141) and small cylinder (142) corresponding to the group of air inlets and the air outlet space enclosed by the large cylinder (141) and small cylinder (142) corresponding to each group of air outlets. The rotor (4) is provided with rotor axial ventilation holes (17) at both ends, which are respectively connected to the air inlet and air outlet holes on the air guides on both sides. Each air guide cylinder (143) corresponding to the air outlet space of each air guide has an air outlet (145). The left end cover (5) is provided with a left end rotor ventilation hole (15) corresponding to the air outlet (145) of the left air guide (1401). The right end cover (6) is provided with a right end rotor ventilation hole (16) corresponding to the air outlet (145) of the right air guide (1402).

2. A forced-air-cooled motor with a cross-type cooling airflow path according to claim 1, characterized in that, A diversion ring plate (18) is installed in the axial middle of multiple right-end ventilation pipes (12) and left-end ventilation pipes (10). The diversion ring plate (18) has multiple perforations for the right-end ventilation pipes (12) or left-end ventilation pipes (10) to pass through, and the outer edge of the diversion ring plate (18) is inclined outward.

3. A forced-air-cooled motor with a cross-type cooling airflow path according to claim 1 or 2, characterized in that, Both the left end cap (5) and the right end cap (6) have end cap air guide ring plates (19) that are gap-fitted with the outer end of the outer wall of the air guide.

4. A forced air-cooled motor with a cross-type cooling airflow path according to claim 3, characterized in that, Multiple stiffeners are fixed on the inner wall of the end cover air guide ring plate (19) to divide the space inside the end cover air guide ring plate (19) into multiple air outlet channels. Multiple left-end rotor ventilation holes (15) and right-end rotor ventilation holes (16) are respectively connected to multiple air outlet channels on both sides.

5. A forced air-cooled motor with a cross-type cooling airflow path according to claim 4, characterized in that, A set of air inlets has at least one air inlet, and a set of air outlets has at least one air outlet.

6. A forced air-cooled motor with a cross-type cooling airflow path according to claim 4, characterized in that, One set of air inlets has three air inlets, and one set of air outlets has three air outlets.

7. A forced-air-cooled motor with a cross-type cooling airflow path according to claim 6, characterized in that, The cross-section of the air outlet (145) on the left air guide (1401) and the right air guide (1402) is a triangle with rounded corners on its three sides, and the three air outlets are located at the three corners of the air outlet (145).

8. A forced-air-cooled motor with a cross-type cooling airflow path according to claim 7, characterized in that, There are five air vents (144).

9. A forced air-cooled motor with a cross-type cooling airflow path according to claim 8, characterized in that, There are ten rotor ventilation holes (15) on the left end and ten rotor ventilation holes (16) on the right end.

10. A forced-air-cooled motor with a cross-type cooling airflow path according to claim 9, characterized in that, The base (1) is provided with two base air inlets (7).

Images