Driving motor of cooling fan of traction motor of electric locomotive

Abstract

The utility model discloses a driving motor of a cooling fan of a traction motor of an electric locomotive, which adopts an improved sealing mode of a front end cover, a rear end cover and a base, a front assembling groove is arranged on the end wall of the front end cover connected with the base, and a rear assembling groove is arranged on the end wall of the rear end cover connected with the base. Annular elastic sealing pieces are arranged in the front assembling groove and the rear assembling groove, the two sets of annular elastic sealing pieces are symmetrically arranged, the annular elastic sealing pieces are divided into longitudinal sections, connecting sections and transverse sections according to the section, the connecting sections and the transverse sections are symmetrically arranged on the two sides of the longitudinal sections, and the longitudinal sections are in sealing fit with the end wall of the machine base under the elastic effect. And the transverse section is propped against the side wall of the front assembly groove or the rear assembly groove under the elastic action. The design effectively prevents dust from invading into the motor, and improves the operation stability and service life of the driving motor.

Description

Technical Field

[0001] This utility model relates to the field of drive motor technology, specifically a drive motor for a cooling fan of a traction motor in an electric locomotive. Background Technology

[0002] In modern electric locomotives, the cooling fans of the traction motors play a crucial role. These fans provide essential heat dissipation for the traction motors, ensuring stable operation under high load conditions. However, due to the typically harsh working environment of electric locomotives, the fan-driven motors face complex operating conditions, especially at high speeds where rapid airflow can cause external contaminants such as dust and moisture to be drawn into the motor, affecting its normal operation.

[0003] Existing motor-driven fan designs typically employ a frame, front cover, and rear cover structure, which to some extent meets the basic operational requirements of the motor. However, because the connections between the frame and the front and rear covers are usually achieved using simple mechanical connections or seals during assembly, the sealing effect at these joints is relatively poor. With the vibration and friction generated during motor operation, the seals at these joints may be damaged or fail, allowing external dust, moisture, and corrosive substances to enter the motor through the gaps. This directly affects the normal operation of the motor, and may even accelerate wear and reduce its service life. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a drive motor for a cooling fan of a traction motor of an electric locomotive, which can effectively prevent dust from entering the motor and improve the operating stability and service life of the drive motor.

[0005] The technical solution adopted by this utility model to achieve the above-mentioned objective is: a drive motor for a cooling fan of a traction motor of an electric locomotive, comprising a base, a front end cover, a rear end cover, a stator assembly, a rotor assembly, and a rotating shaft. The front end cover and the rear end cover are respectively fixedly connected to the front and rear ends of the base. Heat sinks are fixedly connected to the outer wall of the base. The stator assembly is fixedly installed inside the base. The rotating shaft is rotatably installed at the axis of the front end cover and the rear end cover. The rotor assembly is fixedly installed on the rotating shaft and arranged inside the stator assembly.

[0006] The front end of the rotating shaft extends out from the front end cover, and the rear end of the rotating shaft is assembled inside the rear end cover. A front assembly groove is provided on the end wall of the front end cover connected to the base, and a rear assembly groove is provided on the end wall of the rear end cover connected to the base.

[0007] It also includes an annular elastic seal, which is provided in both the front and rear assembly grooves. The two sets of annular elastic seals are symmetrically arranged. The annular elastic seal is divided into a longitudinal section and a connecting section and a transverse section symmetrically arranged on both sides of the longitudinal section according to its cross-section. The longitudinal section is elastically fitted to the end wall of the base and the transverse section is elastically abutted against the side wall of the front or rear assembly groove.

[0008] Based on the above technical solutions, in order to ensure that the stator assembly can be stably installed inside the frame and that the stator assembly meets the wiring requirements, the following technical solutions are provided.

[0009] It also includes a wire threading plate fixedly installed on the top of the base. The stator assembly is fixed to the base by a fastening screw, and the power line led out from the stator assembly passes through the wire threading plate.

[0010] Based on the above technical solutions, in order to ensure that the rotating shaft can be stably installed at the front end cover and the rear end cover in a way that allows for relative rotation, the following technical solutions are provided.

[0011] The rotating shaft is provided with a front bearing and a rear bearing at its front and rear ends, respectively. The front bearing and the rear bearing are respectively located in the bearing chambers of the front cover and the rear cover. The outer rings of the front bearing and the rear bearing are transition fits with the corresponding bearing chambers, and the inner rings of the front bearing and the rear bearing are interference fits with the rotating shaft.

[0012] Based on the above technical solutions, in order to ensure that the rear bearing can be stably installed in the bearing chamber of the rear cover and to achieve axial positioning of the bearing and the shaft, the following technical solutions are provided.

[0013] The bearing chamber of the rear end cover is a closed structure, and a steel wave spring is installed between the bearing chamber of the rear end cover and the outer ring of the rear end bearing.

[0014] Based on the above technical solutions, in order to ensure that the front bearing can be stably installed in the bearing chamber of the front cover and to achieve axial positioning of the bearing and the shaft, the following technical solutions are provided.

[0015] The bearing chamber of the front cover has an assembly opening to ensure that the rotating shaft can pass through normally. The inner bearing cover is fixedly mounted on the inner side of the front bearing chamber by bolts. The bearing chamber and the inner bearing cover of the front cover are in contact with the outer ring of the front bearing.

[0016] Based on the above technical solutions, in order to ensure the sealing of the connection between the rotating shaft and the front cover and to prevent dust and moisture from entering the drive motor and affecting its normal operation, the following technical solutions are provided.

[0017] A skeleton oil seal is installed at the connection between the front cover and the rotating shaft.

[0018] The beneficial effects of this utility model are:

[0019] The annular elastic seals in the front and rear assembly slots effectively seal the connections between the motor base and the front and rear covers, preventing moisture and dust from entering and affecting the normal operation of the drive motor. When the motor base presses the longitudinal section of the annular elastic seal, the elasticity causes the longitudinal section to press tightly against the end wall of the motor base, achieving a complete seal at the connection point. Furthermore, the elasticity ensures that the transverse section abuts tightly against the side walls of the front and rear assembly slots, effectively preventing the annular elastic seal from becoming stuck in the slots and avoiding any movement that could affect the sealing effect. Combined with the skeleton oil seal installed at the front cover, this effectively seals all connection points of the motor, preventing dust from entering the motor and improving the operational stability and service life of the drive motor. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of an annular elastic seal.

[0022] Figure 3 for Figure 1 Enlarged detail diagram of part A in the middle;

[0023] Figure 4 for Figure 1 Enlarged detail diagram of section B;

[0024] Figure 5 for Figure 1 Enlarged detail diagram of section C;

[0025] Figure 6 for Figure 1 Enlarged detail diagram of section D;

[0026] Figure 7 This is a front view of the present invention.

[0027] In the diagram: 11 Base, 111 Heat sink, 12 Front cover, 121 Front mounting slot, 122 Bearing inner cover, 13 Rear cover, 131 Rear mounting slot, 14 Stator assembly, 141 Power cable, 15 Rotor assembly, 16 Shaft, 161 Front bearing, 162 Rear bearing, 17 Wire threading plate, 181 Steel wave spring, 182 Skeleton oil seal, 2 Annular elastic seal, 21 Longitudinal section, 22 Connecting section, 23 Transverse section. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-7 A drive motor for a cooling fan of a traction motor in an electric locomotive includes a base 11, a front cover 12, a rear cover 13, a stator assembly 14, a rotor assembly 15, and a rotating shaft 16. The front cover 12 and the rear cover 13 are fixedly connected to the front and rear ends of the base 11, respectively. Heat sinks 111 are fixedly connected to the outer wall of the base 11. The stator assembly 14 is fixedly installed inside the base 11. The rotating shaft 16 is rotatably installed at the axis of the front cover 12 and the rear cover 13. The rotor assembly 15 is fixedly installed on the rotating shaft 16 and arranged inside the stator assembly 14.

[0030] The front end of the rotating shaft 16 extends from the front end cover 12, and the rear end of the rotating shaft 16 is fitted inside the rear end cover 13. A front mounting groove 121 is provided on the end wall of the front end cover 12 connected to the base 11, and a rear mounting groove 131 is provided on the end wall of the rear end cover 13 connected to the base 11.

[0031] It also includes an annular elastic seal 2. Both the front assembly groove 121 and the rear assembly groove 131 are provided with annular elastic seal 2. The two sets of annular elastic seal 2 are symmetrically arranged. The annular elastic seal 2 is divided into a longitudinal section 21 and a connecting section 22 and a transverse section 23 symmetrically arranged on both sides of the longitudinal section 21. The longitudinal section 21 is kept in a sealed fit with the end wall of the base 11 by elastic action. The transverse section 23 is kept in contact with the side wall of the front assembly groove 121 or the rear assembly groove 131 by elastic action.

[0032] The base 11, front cover 12 and rear cover 13 are all cast gray iron structures, and the insulation materials added to the drive motor are all H-grade low smoke and non-toxic materials.

[0033] The base 11, front cover 12, and rear cover 13 form the housing structure of the drive motor, which can ensure that the stator assembly 14, rotor assembly 15, and shaft 16 are stably installed and operated inside it. Heat sinks 111 are provided on the base 11 to take into account both protection and heat dissipation.

[0034] When assembling the drive motor, especially the frame 11, front cover 12, and rear cover 13, after the three are assembled, the annular elastic seal 2 set in the front assembly groove 121 and rear assembly groove 131 can effectively seal the connection between the frame 11 and the front cover 12 and rear cover 13, preventing moisture and dust from entering the interior and affecting the normal operation of the drive motor.

[0035] Specifically, when the base 11 presses the longitudinal section 21 of the annular elastic seal 2, under the action of elasticity, the longitudinal section 21 can be tightly pressed against the end wall of the base 11 and achieve a full seal at the connection position. Under the action of elasticity, the transverse section 23 is tightly abutted against the side walls of the front assembly groove 121 and the rear assembly groove 131, effectively preventing the annular elastic seal 2 from being stably stuck in the front assembly groove 121 or the rear assembly groove 131, and preventing the annular elastic seal 2 from jumping and affecting the sealing effect.

[0036] The drive motor provided by this utility model provides driving force as a driving device for the cooling fan of the traction motor of an electric locomotive. In use, the drive motor is installed on the fan duct through the screw holes on the fan mounting bracket. The rotating shaft 16 in the drive motor is connected to the fan. After the circuit is turned on, the drive motor drives the fan to run, so as to dissipate heat from the traction motor.

[0037] Based on the above technical solutions, in order to ensure that the stator assembly 14 can be stably installed inside the frame 11 and that the stator assembly 14 meets the wiring requirements, the following technical solutions are provided.

[0038] It also includes a wire threading plate 17 fixedly installed on the top of the base 11. The stator assembly 14 is fixed to the base 11 by a fastening screw. The power line 141 led out from the stator assembly 14 passes through the wire threading plate 17.

[0039] The wire threading pressure plate 17 ensures the sealing effect at the connection point between the power cord 141 and the machine base 11. After the power cord 141 is connected to the power supply, the stator assembly 14 can be powered through the power cord 141 to drive the rotor assembly 15 and the shaft 16 to operate stably.

[0040] Based on the above technical solutions, in order to ensure that the rotating shaft 16 can be stably installed at the front cover 12 and the rear cover 13 in a relative rotation manner, the following technical solutions are provided.

[0041] The front and rear ends of the rotating shaft 16 are respectively provided with a front bearing 161 and a rear bearing 162. The front bearing 161 and the rear bearing 162 are respectively located in the bearing chambers of the front cover 12 and the rear cover 13. The outer rings of the front bearing 161 and the rear bearing 162 are transition fits with the corresponding bearing chambers, and the inner rings of the front bearing 161 and the rear bearing 162 are interference fits with the rotating shaft 16.

[0042] Front bearing 161 and rear bearing 162 are installed in the bearing chambers of front cover 12 and rear cover 13. The rotating shaft 16 is assembled in the front bearing 161 and rear bearing 162. The outer ring and inner ring of the front bearing 161 and rear bearing 162 are installed with the bearing chamber and the rotating shaft 16 respectively by means of transition fit and interference fit, which can ensure the coaxiality of the rotating shaft 16 assembly and the stability of operation. The front bearing 161 and rear bearing 162 are deep groove bearings, which can reduce the wear of the rotating shaft 16 during operation.

[0043] Based on the above technical solutions, in order to ensure that the rear bearing 162 can be stably installed in the bearing chamber of the rear cover 13 and to achieve axial positioning of the bearing and the shaft 16, the following technical solutions are provided.

[0044] The bearing chamber of the rear end cover 13 is a closed structure, and a steel wave spring 181 is installed between the bearing chamber of the rear end cover 13 and the outer ring of the rear end bearing 162.

[0045] The steel wave spring 181 can provide axial preload to prevent the rear bearing 162 from moving during operation and improve the bearing's service life.

[0046] Based on the above technical solutions, in order to ensure that the front bearing 161 can be stably installed in the bearing chamber of the front cover 12 and to achieve axial positioning of the bearing and the shaft 16, the following technical solutions are provided.

[0047] The bearing chamber of the front cover 12 has an assembly opening to ensure that the rotating shaft 16 can pass through normally. The inner bearing cover 122 is fixedly mounted on the inner side of the front bearing 161 chamber by bolts. The bearing chamber of the front cover 12, the inner bearing cover 122 and the outer ring of the front bearing 161 are in contact.

[0048] The bearing chamber of the front cover 12 and the bearing inner cover 122 are directly abutted against the outer ring of the front bearing 161, which enables precise axial positioning of the front bearing 161 with the help of the front cover 12 and the bearing inner cover 122.

[0049] Based on the above technical solutions, in order to ensure the sealing of the connection between the rotating shaft 16 and the front cover 12 and to prevent dust and moisture from entering the drive motor and affecting its normal operation, the following technical solutions are provided.

[0050] A skeleton oil seal 182 is installed at the connection between the front cover 12 and the rotating shaft 16.

[0051] The skeleton oil seal 182 can effectively seal the connection between the rotating shaft 16 and the front cover 12 to prevent external moisture and dust from entering the drive motor.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drive motor for a cooling fan of a traction motor of an electric locomotive, comprising a base (11), a front end cover (12), a rear end cover (13), a stator assembly (14), a rotor assembly (15), and a rotating shaft (16). The front end cover (12) and the rear end cover (13) are fixedly connected to the front and rear ends of the base (11), respectively. Heat sinks (111) are fixedly connected to the outer wall of the base (11). The stator assembly (14) is fixedly installed inside the base (11). The rotating shaft (16) is rotatably installed at the axis of the front end cover (12) and the rear end cover (13). The rotor assembly (15) is fixedly installed on the rotating shaft (16) and arranged inside the stator assembly (14). Its features are: The front end of the rotating shaft (16) extends from the front end cover (12), and the rear end of the rotating shaft (16) is fitted inside the rear end cover (13). A front assembly groove (121) is provided on the end wall of the front end cover (12) connected to the base (11), and a rear assembly groove (131) is provided on the end wall of the rear end cover (13) connected to the base (11). It also includes an annular elastic seal (2), and the annular elastic seal (2) is provided in both the front assembly groove (121) and the rear assembly groove (131). The two sets of annular elastic seals (2) are symmetrically arranged. The annular elastic seal (2) is divided into a longitudinal section (21) and a connecting section (22) and a transverse section (23) symmetrically arranged on both sides of the longitudinal section (21). The longitudinal section (21) is elastically fitted to the end wall of the base (11) and the transverse section (23) is elastically fitted to the side wall of the front assembly groove (121) or the rear assembly groove (131).

2. The drive motor for a cooling fan of a traction motor in an electric locomotive according to claim 1, characterized in that: It also includes a wire threading plate (17) fixedly installed on the top of the base (11), the stator assembly (14) is fixed to the base (11) by a fastening screw, and the power line (141) led out from the stator assembly (14) passes through the wire threading plate (17).

3. The drive motor for a cooling fan of an electric locomotive traction motor according to claim 1, characterized in that: The front and rear ends of the shaft (16) are respectively provided with a front bearing (161) and a rear bearing (162). The front bearing (161) and the rear bearing (162) are respectively located in the bearing chambers of the front cover (12) and the rear cover (13). The outer rings of the front bearing (161) and the rear bearing (162) are transition fits with the corresponding bearing chambers, and the inner rings of the front bearing (161) and the rear bearing (162) are interference fits with the shaft (16).

4. The drive motor for a cooling fan of a traction motor in an electric locomotive according to claim 3, characterized in that: The bearing chamber of the rear end cover (13) is a closed structure, and a steel wave spring (181) is installed between the bearing chamber of the rear end cover (13) and the outer ring of the rear end bearing (162).

5. The drive motor for a cooling fan of a traction motor in an electric locomotive according to claim 3, characterized in that: The bearing chamber of the front cover (12) is provided with an assembly opening to ensure that the rotating shaft (16) can pass through normally. The inner side of the front bearing (161) chamber is fixedly fitted with a bearing inner cover (122) by bolts. The bearing chamber of the front cover (12), the bearing inner cover (122) and the outer ring of the front bearing (161) are in contact.

6. The drive motor for a cooling fan of a traction motor in an electric locomotive according to claim 5, characterized in that: A skeleton oil seal (182) is installed at the connection between the front cover (12) and the rotating shaft (16).

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