Traction motor rotor shaft structure

Abstract

The utility model discloses a traction motor rotor shaft structure, which comprises a rotor shaft and an end cap, and the end cap is nested at the tail end of the rotor shaft and is rotatably connected with the rotor shaft. A sealing groove is formed in the outer wall of one end of the rotor shaft, and an inner through groove and an inner spiral through groove are formed in the rotor shaft; the traction motor rotor shaft structure comprises an end cap, a sealing rubber ring is embedded in the inner edge of the end cap, an annular inner groove is formed in the end cap, a liquid inlet pipe opening is formed in the middle of the top of the end cap, and a backflow pipe opening is formed in the middle of the side wall of the end cap. The end cap is externally connected with oil cooling equipment, continuous oil cooling is achieved on the rotor shaft, a large amount of heat can be carried from the inside through the heat dissipation mode, compared with other heat dissipation modes, the heat dissipation efficiency of the heat dissipation mode is optimal, the rotor shaft can be kept stable at a higher rotating speed, and the situation that the dynamic balance of the rotor shaft is affected by high temperature is avoided.

Description

Technical Field

[0001] The utility model relates to the field of rotor shafts, in particular to a traction motor rotor shaft structure. Background Art

[0002] The rotor shaft of the traction motor is one of the core components of the traction motor and is used to rotate the traction device. The traction motor is an electric motor used to drive vehicles or mechanical devices. It is commonly found in electric vehicles, locomotives, elevators and other applications. The rotor shaft is the output shaft of the traction motor and drives the wheels of the car or other traction devices by rotating.

[0003] The rotor shaft is one of the important components inside the traction motor, but it still has some problems: most motors rely on air cooling to cool the internal components, but since the rotor shaft is thick and is in a continuous high-speed rotation process, its temperature is relatively high. When the cooling rate cannot meet the standard, the high temperature can easily cause the rotor shaft to soften or even deform, thereby affecting the dynamic balance of the rotor shaft; therefore, in view of the above situation, it is urgent to develop a traction motor rotor shaft structure to overcome the shortcomings in current practical applications and meet current needs. Utility Model Content

[0004] The purpose of the utility model is to provide a traction motor rotor shaft structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The traction motor rotor shaft structure comprises a rotor shaft and an end cap, wherein the end cap is nested at the end of the rotor shaft and is rotatably connected to the rotor shaft;

[0007] A sealing groove is provided on the outer wall of one end of the rotor shaft, and an inner through groove and an inner spiral through groove are provided inside the rotor shaft;

[0008] A sealing rubber ring is embedded and installed at the inner edge of the end cap, an annular inner groove is opened inside the end cap, a liquid inlet pipe opening is installed at the middle position of the top of the end cap, and a return pipe opening is installed at the middle position of the side wall of the end cap.

[0009] As a further solution of the utility model: the sealing rubber ring matches the sealing groove, and the sealing effect between the end cap and the rotor shaft can be improved by setting the sealing rubber ring.

[0010] As a further solution of the utility model: the end of the inner through groove passes through the rotor shaft, and is connected to and fixed with the return pipe opening, and the coolant in the inner through groove is discharged through the return pipe opening.

[0011] As a further solution of the utility model: one end of the inner through groove away from the end cap is connected to the inner spiral through groove, and the coolant in the inner spiral through groove refluxes through the inner through groove to realize cooling circulation.

[0012] As a further solution of the utility model: the liquid inlet pipe opening is communicated with the annular inner groove, and the cooling liquid is transported to the annular inner groove through the liquid inlet pipe opening.

[0013] As a further solution of the utility model: one end of the inner spiral groove close to the end cap passes through the side wall of the rotor shaft and is connected with the annular inner groove, and the coolant introduced through the liquid inlet can enter the inner spiral groove through the annular inner groove.

[0014] Beneficial effects: The rotor shaft structure of this traction motor is provided with an inner spiral groove and an inner groove for cooling inside the rotor shaft, and the end cap is connected to an external oil cooling device to achieve continuous oil cooling of the rotor shaft. This heat dissipation method can remove a large amount of heat from the inside. Compared with other heat dissipation methods, this heat dissipation method has the best heat dissipation efficiency, allowing the rotor shaft to remain stable at a higher speed and avoid high temperature affecting the dynamic balance of the rotor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front structural schematic diagram of the utility model.

[0016] Figure 2 This is a schematic diagram of the rotor shaft structure of the utility model.

[0017] Figure 3 It is an overall side longitudinal sectional view of the utility model.

[0018] Figure 4 For this utility model Figure 3 A magnified view of part A.

[0019] Figure 5 It is a schematic diagram of the annular inner groove structure of the utility model.

[0020] Figure 6 This is a schematic diagram of the reflux nozzle structure of the utility model.

[0021] Figure 7 It is a partial cross-sectional view of the end cap of the utility model.

[0022] In the figure: 1, rotor shaft; 11, sealing groove; 12, inner through groove; 13, inner spiral through groove; 2, end cap; 21, sealing rubber ring; 22, annular inner groove; 23, liquid inlet pipe opening; 24, reflux pipe opening. DETAILED DESCRIPTION Example

[0023] See also Figures 1 to 7 In the embodiment of the utility model, the traction motor rotor shaft structure includes a rotor shaft 1 and an end cap 2, wherein the end cap 2 is nested at the end of the rotor shaft 1 and is rotatably connected to the rotor shaft 1;

[0024] A sealing groove 11 is formed on the outer wall of one end of the rotor shaft 1, and an inner through groove 12 and an inner spiral through groove 13 are formed inside the rotor shaft 1;

[0025] A sealing rubber ring 21 is embedded in the inner edge of the end cap 2 , an annular inner groove 22 is provided inside the end cap 2 , a liquid inlet port 23 is installed in the middle of the top of the end cap 2 , and a return port 24 is installed in the middle of the side wall of the end cap 2 .

[0026] As a further solution of the utility model: the sealing rubber ring 21 matches the sealing groove 11 , and the sealing effect between the end cap 2 and the rotor shaft 1 can be improved by setting the sealing rubber ring 21 .

[0027] As a further solution of the utility model: the end of the inner through groove 12 passes through the rotor shaft 1 and is connected and fixed to the return pipe opening 24 , and the coolant in the inner through groove 12 is discharged through the return pipe opening 24 .

[0028] As a further solution of the utility model: one end of the inner groove 12 away from the end cap 2 is connected to the inner spiral groove 13, and the coolant in the inner spiral groove 13 flows back through the inner groove 12 to achieve cooling circulation.

[0029] As a further solution of the utility model: the liquid inlet pipe opening 23 is communicated with the annular inner groove 22 , and the cooling liquid is transported to the annular inner groove 22 through the liquid inlet pipe opening 23 .

[0030] As a further solution of the utility model: one end of the inner spiral groove 13 close to the end cap 2 passes through the side wall of the rotor shaft 1 and is connected to the annular inner groove 22 , and the coolant introduced through the liquid inlet port 23 can enter the inner spiral groove 13 through the annular inner groove 22 .

[0031] The working principle of the utility model is: when the traction motor rotor shaft structure is in use, the liquid supply pipe of the external oil cooling device is pre-connected with the liquid inlet pipe port 23, and the return pipe of the external oil cooling device is connected with the return pipe port 24. The external oil cooling device pumps the cooling oil into the annular inner groove 22 of the end cap 2 through the liquid inlet pipe port 23, and then enters the inner spiral groove 13 through the annular inner groove 22, flows to the other end along the inner spiral groove 13, and then refluxes through the inner groove 12 at the end, and finally refluxes to the oil cooling device through the reflux pipe port 24, thereby realizing the rotor shaft cooling cycle.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The traction motor rotor shaft structure is characterized by: It comprises a rotor shaft (1) and an end cap (2), wherein the end cap (2) is nested at the end of the rotor shaft (1) and is rotatably connected to the rotor shaft (1); A sealing groove (11) is provided on the outer wall of one end of the rotor shaft (1), and an inner through groove (12) and an inner spiral through groove (13) are provided inside the rotor shaft (1); A sealing rubber ring (21) is embedded and installed at the inner edge of the end cap (2), an annular inner groove (22) is provided inside the end cap (2), a liquid inlet pipe opening (23) is installed at the middle position of the top of the end cap (2), and a return pipe opening (24) is installed at the middle position of the side wall of the end cap (2).

2. The traction motor rotor shaft structure according to claim 1, characterized in that: The sealing rubber ring (21) matches the sealing groove (11).

3. The traction motor rotor shaft structure according to claim 1, characterized in that: The end of the inner through groove (12) passes through the rotor shaft (1) and is connected to and fixed to the return pipe opening (24).

4. The traction motor rotor shaft structure according to claim 1, characterized in that: One end of the inner through groove (12) away from the end cap (2) is in communication with the inner spiral through groove (13).

5. The traction motor rotor shaft structure according to claim 1, characterized in that: The liquid inlet pipe opening (23) is in communication with the annular inner groove (22).

6. The traction motor rotor shaft structure according to claim 1, characterized in that: An end of the inner spiral through groove (13) close to the end cap (2) passes through the side wall of the rotor shaft (1) and is in communication with the annular inner groove (22).

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