Overall oil cooling device for motor armature of new energy automobile

Abstract

The utility model discloses a new energy automobile motor armature integral oil cooling device which comprises a motor casing and an oil cooling circulation assembly, an inner cavity of the motor casing is provided with an oil separation ring along the inner diameter of an armature, the oil separation ring divides the inner cavity of the motor casing into an inner cavity body and an outer cavity body, the outer cavity body is internally provided with an armature winding and an armature iron core, and the armature winding is connected with the armature iron core. A plurality of communicating slotted holes are vertically formed in the middle of the armature core, the upper cavity and the lower cavity of the outer cavity are communicated with each other through the communicating slotted holes, and the outer cavity is filled with cooling oil; an oil inlet hole and an oil outlet hole are formed in the side face of the motor shell, and an inlet and an outlet of the oil cooling circulation assembly are connected with the oil outlet hole and the oil inlet hole respectively. The armature winding cooling device overcomes the defects in the prior art, the whole device is simple in structure and higher in cooling efficiency, cooling oil can reach the positions of all armature winding copper wires in the outer cavity, and therefore the whole armature winding can be cooled more evenly.

Description

Technical Field

[0001] The utility model relates to the mechanical field, in particular to motor armature cooling, and specifically to an integral oil cooling device for a motor armature of a new energy vehicle. Background Art

[0002] The main type of motor used in new energy vehicles is a permanent magnet synchronous motor. In the motor armature cooling method, the existing technology usually uses water cooling and oil cooling to select the cooling scheme. The coolant in the water cooling scheme cannot contact the winding, so the cooling performance is relatively poor. Due to the non-conductive and non-magnetic properties of the oil itself, it can be used as a cooling medium for direct cooling of the motor, taking away the heat of the main heat-generating components, and more effectively reducing the copper loss of the motor stator and the iron loss of the stator and rotor, thereby improving the efficiency of the whole machine. However, the oil cooling method in the existing technology requires the design of an oil channel, which has a relatively complex structure, and the winding has less contact with the cooling oil, resulting in uneven cooling effect. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides an integral oil cooling device for the armature of a new energy vehicle motor, which overcomes the shortcomings of the prior art. The entire device has a simple structure and higher cooling efficiency, and the cooling oil can reach all armature winding copper wire positions in the outer cavity, thereby making the overall cooling of the armature winding more uniform.

[0004] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] An integral oil cooling device for an armature of a motor of a new energy vehicle comprises a motor housing and an oil cooling circulation assembly, wherein an oil separator ring is arranged in the inner cavity of the motor housing along the inner diameter of the armature, wherein the oil separator ring divides the inner cavity of the motor housing into an inner cavity and an outer cavity, wherein an armature winding and an armature core are arranged in the outer cavity, wherein a plurality of connecting slots are vertically opened in the middle of the armature core, wherein an upper cavity and a lower cavity of the outer cavity are connected to each other through the connecting slots, and wherein the outer cavity is filled with cooling oil;

[0006] The motor housing is provided with an oil inlet and an oil outlet, and the inlet and the outlet of the oil cooling circulation component are respectively connected to the oil outlet and the oil inlet.

[0007] Preferably, the oil cooling circulation assembly includes a radiator and an oil pump, the output port of the oil pump is connected to the oil inlet hole through an oil inlet pipe, the input port of the oil pump is connected to the oil outlet hole through an oil outlet pipe, and the radiator is installed on the oil inlet pipe or the oil outlet pipe.

[0008] Preferably, the motor housing comprises a shell and an end cover, and the end cover is mounted on the upper end of the shell.

[0009] Preferably, the oil separator ring includes an upper oil separator ring and a lower oil separator ring, the lower end of the upper oil separator ring is arranged above the armature core, and the upper end of the upper oil separator ring is sealed and connected to the lower surface of the end cover; the upper end of the lower oil separator ring is arranged below the armature core, and the lower end of the lower oil separator ring is sealed and connected to the bottom of the inner cavity of the shell.

[0010] Preferably, the lower end of the oil separator ring is sealed and connected to the bottom of the inner cavity of the shell, and the upper end of the oil separator ring is sealed and connected to the lower surface of the end cover.

[0011] Preferably, sealing grooves are provided at the bottom of the inner cavity of the shell and the lower surface of the end cover, and sealing rings are installed in the sealing grooves. The upper end and the lower end of the oil separator ring are respectively against the two sealing rings.

[0012] Preferably, sealing rings are installed at the upper end and the lower end of the oil separator ring, respectively, and the upper end and the lower end of the oil separator ring are respectively abutted against the bottom of the inner cavity of the shell and the lower surface of the end cover through the sealing rings.

[0013] Preferably, a guide column is installed above the armature core, a guide hole is opened on the surface of the end cover, a guide sleeve is installed in the guide hole, and the end cover is movably connected to the guide column through the guide sleeve.

[0014] Preferably, the cooling oil is transformer oil.

[0015] The utility model provides an integral oil cooling device for the armature of a new energy vehicle motor. It has the following beneficial effects: by using an oil separator ring to separate the inner cavity of the motor housing into an inner cavity and an outer cavity that are independent of each other, the outer cavity is used as an independent cooling zone to accommodate the armature winding and the armature core teeth and yoke, and then by opening a connecting slot hole that is connected up and down on the armature core, the upper cooling zone and the lower cooling zone in the outer cavity are connected in series, and then the cooling oil enters the outer cavity through the oil inlet hole, and can flow through the connecting slot hole to realize the upper and lower cooling zones in the outer cavity, so that the cooling oil can directly and fully contact the armature winding, so that the overall cooling of the armature winding is more uniform, and at the same time, the oil pump and the radiator are connected to realize oil circulation, and the structure is simpler than the traditional cooling method, and the cooling efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for describing the prior art are briefly introduced below.

[0017] Figure 1 A schematic diagram of the structure of the utility model;

[0018] Figure 2 A schematic diagram of the cross-sectional structure of the motor housing in the utility model;

[0019] Figure 3 A schematic cross-sectional view of a motor housing in the utility model;

[0020] Figure 4 A schematic diagram of the cross-sectional structure of the motor housing when the end cover is opened in the utility model;

[0021] Description of the numbers in the figure:

[0022] 1. Motor housing; 2. Oil separator ring; 3. Inner cavity; 4. Outer cavity; 5. Armature winding; 6. Armature core; 7. Connecting slot; 8. Oil inlet hole; 9. Oil outlet hole; 10. Oil inlet pipe; 11. Radiator; 12. Oil pump; 13. Oil outlet pipe; 14. Sealing ring; 15. Guide column; 16. Guide sleeve; 101. Housing; 102. End cover; 201 Upper oil separator ring; 202. Lower oil separator ring. Implementation

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0024] Embodiment 1, as Figures 1 to 4 As shown, an integral oil cooling device and oil cooling circulation component of a motor armature of a new energy vehicle include a motor housing 1, an inner cavity of the motor housing 1 is injection-molded along the inner diameter of the armature to form an oil separator ring 2, the oil separator ring 2 separates the inner cavity of the motor housing 1 into an inner cavity 3 and an outer cavity 4 that are independent of each other, an armature winding 5 and an armature core 6 are arranged in the outer cavity 4, a plurality of connecting slots 7 are vertically opened in the middle of the armature core 6, the upper cavity and the lower cavity of the outer cavity 4 are connected to each other through the connecting slots 7, and the outer cavity 4 is filled with cooling oil; in this embodiment, the cross-sectional shape of the connecting slot 7 can be any shape such as square, circular, triangular, etc.

[0025] An oil inlet hole 8 and an oil outlet hole 9 are respectively provided on the upper and lower sides of the motor housing 1, and the inlet and outlet of the oil cooling circulation component are respectively connected to the oil outlet hole 9 and the oil inlet hole 8. In this embodiment, the oil cooling circulation component can adopt a radiator 11 and an oil pump 12, the oil inlet hole 8 is connected to the output port of the oil pump 12 through an oil inlet pipe 10, and the oil outlet hole 9 is connected to the input port of the oil pump 12 through an oil outlet pipe 13. The radiator 11 can be installed on the oil inlet pipe 10 or on the oil outlet pipe 13 to cool the circulating cooling oil.

[0026] Working principle:

[0027] An oil separator ring 2 is used to separate the inner cavity of the motor housing 1 into an inner cavity 3 and an outer cavity 4 which are independent of each other, so as to separate the armature winding 5 from the inner side of the armature, so that the outer cavity 4 serves as an independent cooling zone to accommodate the armature winding 5 and the teeth and yoke of the armature core 6, and then a connecting slot 7 which is connected up and down is opened on the armature core 6, so that the upper cooling zone and the lower cooling zone in the outer cavity 4 are connected in series.

[0028] During operation, by starting the oil pump 12, the cooling oil enters the upper end of the outer cavity 4 through the oil inlet hole 8, and then flows through the connecting slot hole 7 to realize the flow of the upper and lower cooling zones, so that the cooling oil can fully contact the armature winding 5 for cooling, and then the cooling oil is discharged by the action of the oil pump 12 and transported to the radiator 11 for heat dissipation and cooling, and finally flows back into the outer cavity 4 through the oil inlet pipe 10 to form a cooling oil cycle. The entire device has a simple structure, higher cooling efficiency, and the cooling oil can reach all the winding copper wire positions in the outer cavity 4, so that the overall cooling of the armature winding 5 is more uniform.

[0029] Embodiment 2, as a further preferred solution of embodiment 1, the motor housing 1 includes a housing 101 and an end cover 102, and the end cover 102 is mounted on the upper end of the housing 101. In this embodiment, corresponding connecting seats are provided on the outer side surface of the end cover 102 and the upper end of the outer side surface of the housing 101, and the two corresponding connecting seats are locked and fixed by fixing bolts, so as to achieve the installation and fixation between the end cover 102 and the housing 101.

[0030] Embodiment three, as Figure 3 As shown, as a further preferred embodiment of the second embodiment, the oil separator ring 2 includes an upper oil separator ring 201 and a lower oil separator ring 202, the lower end of the upper oil separator ring 201 is fixedly connected to the top of the armature core 6, and the upper end of the lower oil separator ring 202 is fixedly connected to the bottom of the armature core 6, wherein the upper end of the upper oil separator ring 201 is sealedly connected to the lower surface of the end cover 102, and the lower end of the lower oil separator ring 202 is sealedly connected to the bottom of the inner cavity of the shell 101, so that the upper part of the inner cavity of the motor casing 1 can be separated by the upper oil separator ring 201, and the lower part of the inner cavity of the motor casing 1 can be separated by the lower oil separator ring 202, and then the armature winding 5 is separated from the inner side of the armature to form an independent inner cavity 3 and outer cavity 4.

[0031] Embodiment 4, as a further preferred solution of embodiment 2, the oil separator 2 can also adopt an integrated structure, by sealingly connecting the lower end of the oil separator 2 with the bottom of the inner cavity of the housing 101, and sealingly connecting the upper end of the oil separator 2 with the lower surface of the end cover 102. Thus, the inner cavity of the motor housing 1 can be separated, and then the armature winding 5 can be separated from the inner side of the armature to form an inner cavity 3 and an outer cavity 4 that are independent of each other.

[0032] Embodiment 5, as a further preferred solution of embodiment 2 or embodiment 3, a sealing groove is provided at the bottom of the inner cavity of the housing 101 and the lower surface of the end cover 102, and a sealing ring 14 is installed in the sealing groove. After the end cover 102 is installed at the upper end of the housing 101, the upper and lower ends of the oil separator 2 are respectively against the two sealing rings 14. By isolating the oil separator 2 between the upper and lower sealing rings 14, when the end cover 102 is installed at the upper end of the housing 101, the oil separator 2 and the sealing ring 14 can be squeezed and sealed, thereby achieving a sealing effect on the external cavity 4.

[0033] Embodiment 6, as a further preferred solution of embodiment 2 or embodiment 3, the upper and lower ends of the oil separator ring 2 are respectively fixedly mounted with sealing rings 14, and the upper and lower ends of the oil separator ring 2 are respectively abutted against the bottom of the inner cavity of the shell 101 and the lower surface of the end cover 102 through the sealing rings 14. Therefore, after the end cover 102 is installed on the upper end of the shell 101, the sealing rings 14 at both ends of the oil separator ring 2 can be directly squeezed and sealed, thereby achieving a sealing effect on the external cavity 4. Compared with embodiment 4, there is no need to consider the problem of the corresponding positions between the oil separator ring 2 and the sealing ring 14.

[0034] Embodiment 7, as a further preferred solution of Embodiment 2, a guide column 15 is installed above the armature core 6, a guide hole is opened on the surface of the end cover 102, a guide sleeve 16 is installed in the guide hole, and the end cover 102 is movably sleeved on the guide column 15 through the guide sleeve 16. When installing the end cover 102, the guide column 15 can be used to guide the end cover 102 so that the housing 101 can be quickly positioned and installed, and the guide sleeve 16 can achieve the sealing and protection of the guide hole.

[0035] Embodiment 8, as a further preferred solution of embodiment 1, the cooling oil may be transformer oil, so as to ensure good insulation and avoid the problem of winding breakdown caused by short circuit and arc.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integral oil cooling device for the armature of a new energy vehicle motor, characterized in that: The invention comprises a motor housing (1) and an oil cooling circulation component, wherein an oil separator ring (2) is arranged in the inner cavity of the motor housing (1) along the inner diameter of the armature, and the oil separator ring (2) divides the inner cavity of the motor housing (1) into an inner cavity (3) and an outer cavity (4), and an armature winding (5) and an armature core (6) are arranged in the outer cavity (4), and a plurality of connecting slots (7) are vertically opened in the middle of the armature core (6), and the upper cavity and the lower cavity of the outer cavity (4) are connected to each other through the connecting slots (7), and the outer cavity (4) is filled with cooling oil; The motor housing (1) is provided with an oil inlet hole (8) and an oil outlet hole (9), and the inlet and outlet of the oil cooling circulation component are respectively connected to the oil outlet hole (9) and the oil inlet hole (8).

2. The new energy vehicle motor armature integral oil cooling device according to claim 1 is characterized in that: The oil cooling circulation assembly comprises a radiator (11) and an oil pump (12); the output port of the oil pump (12) is connected to the oil inlet hole (8) via an oil inlet pipe (10); the input port of the oil pump (12) is connected to the oil outlet hole (9) via an oil outlet pipe (13); and the radiator (11) is mounted on the oil inlet pipe (10) or the oil outlet pipe (13).

3. The integral oil cooling device for the armature of a new energy vehicle motor according to claim 1 is characterized in that: The motor housing (1) comprises a housing (101) and an end cover (102), wherein the end cover (102) is mounted on the upper end of the housing (101).

4. The integral oil cooling device for the armature of a new energy vehicle motor according to claim 3 is characterized in that: The oil separator ring (2) comprises an upper oil separator ring (201) and a lower oil separator ring (202); the lower end of the upper oil separator ring (201) is arranged above the armature core (6), and the upper end of the upper oil separator ring (201) is sealed and connected to the lower surface of the end cover (102); the upper end of the lower oil separator ring (202) is arranged below the armature core (6), and the lower end of the lower oil separator ring (202) is sealed and connected to the bottom of the inner cavity of the housing (101).

5. The integral oil cooling device for the armature of a new energy vehicle motor according to claim 3 is characterized in that: The lower end of the oil separator ring (2) is sealedly connected to the bottom of the inner cavity of the housing (101), and the upper end of the oil separator ring (2) is sealedly connected to the lower surface of the end cover (102).

6. The integral oil cooling device for the armature of a new energy vehicle motor according to any one of claims 3 to 5, characterized in that: The bottom of the inner cavity of the housing (101) and the lower surface of the end cover (102) are both provided with sealing grooves, in which sealing rings (14) are installed, and the upper end and the lower end of the oil separator ring (2) are respectively abutted against two sealing rings (14).

7. The integral oil cooling device for the motor armature of a new energy vehicle according to any one of claims 3 to 5, characterized in that: The upper end and the lower end of the oil separator ring (2) are respectively provided with sealing rings (14), and the upper end and the lower end of the oil separator ring (2) are respectively abutted against the bottom of the inner cavity of the shell (101) and the lower surface of the end cover (102) through the sealing rings (14).

8. The new energy vehicle motor armature integral oil cooling device according to claim 3 is characterized in that: A guide column (15) is installed above the armature core (6), a guide hole is opened on the surface of the end cover (102), a guide sleeve (16) is installed in the guide hole, and the end cover (102) is movably sleeved on the guide column (15) through the guide sleeve (16).

9. The new energy vehicle motor armature integral oil cooling device according to claim 1 is characterized in that: The cooling oil is transformer oil.

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