Oil injection ring with insulation function

Abstract

The invention discloses an oil injection ring with an insulation function, and relates to the field of oil injection rings, the oil injection ring comprises an isolation ring and an oil injection seat, the isolation ring is arranged on the oil injection seat, and a cooling oil separation ring is arranged on the outer side wall of the isolation ring; the end, away from the oil injection base, of the isolating ring is provided with an insulating baffle used for separating the motor shell from the end of the stator winding, the side wall of the oil injection base is provided with a plurality of oil inlet holes, and the oil injection base is provided with a plurality of oil injection nozzles which are in one-to-one correspondence with the oil inlet holes and used for injecting oil to the stator winding. An oil return hole is formed in the side wall of the isolating ring; the installation position of the oil injection ring is kept unchanged or the oil injection ring is matched with the motor shell in the radial direction, the oil injection ring forms wrapping protection on the end portion of the motor winding, at the moment, insulation protection of the stator winding and the motor shell can be formed through the oil injection ring, and the end portion of the stator is prevented from discharging to the motor shell.

Description

Technical Field

[0001] The invention relates to the field of oil injection rings, and in particular to an oil injection ring with an insulating function. Background Art

[0002] At present, for the sake of safety and protection of motor use, it is necessary to detect or control the temperature of various motors during their operation. If the temperature of the motor reaches a certain value during operation, it is necessary to reduce the power of the motor for forced cooling to ensure the safety and effective life of the product. This limits the high-power continuous output of the motor and the upward expansion of power.

[0003] In traditional motor design cases, there are two commonly used motor cooling methods: one is natural cooling, in which the design scheme is that the outer surface of the motor has a sufficiently large heat dissipation surface or the motor is an open design scheme, and heat dissipation is achieved through heat exchange between the air medium and the motor; the other is forced air cooling, in which the design scheme is that the motor rotor is integrated with fan blades or the outside of the motor is integrated with a fan to speed up the air circulation inside / outside the motor, thereby speeding up the heat exchange between the motor temperature and the air, achieving a better heat dissipation effect.

[0004] In order to further improve the motor temperature rise problem and maximize the motor's torque / power, through continuous design improvements, a variety of single water-cooled, single oil-cooled and even mixed cooling motors have appeared on the market. Compared with traditional motor cooling solutions, water-cooled, single oil-cooled or mixed cooling motors have greatly improved the heat dissipation power.

[0005] However, in the oil-cooled motors currently on the market that install an oil injection ring on the motor and then use the oil injection ring to spray coolant for cooling, the oil injection ring only has the ability to form a stator oil circuit and can only spray oil on the stator. The oil injection ring and the motor housing form a closed oil circuit, and then the lubricating oil is sprayed onto the stator from the oil holes around the oil injection ring, thereby cooling the stator. In actual use, the oil injection ring does not have the function of forming insulation protection for the stator, which may lead to the presence of conductive impurities between the stator axis and the housing. Summary of the invention

[0006] In view of this, an object of the present invention is to provide an oil injection ring with insulation function.

[0007] The oil injection ring with insulation function provided by the present invention adopts the following technical solutions:

[0008] An oil spray ring with an insulating function comprises an isolating ring and an oil spray seat, wherein the isolating ring is arranged on the oil spray seat, a cooling oil separating ring is arranged on the outer side wall of the isolating ring, an insulating baffle for isolating a motor housing and an end of a stator winding is arranged on the end of the isolating ring away from the oil spray seat, a plurality of oil inlet holes are arranged on the side wall of the oil spray seat, a plurality of oil spray nozzles corresponding to the oil inlet holes and spraying oil to the stator winding are arranged on the oil spray seat, and an oil return hole is arranged on the side wall of the isolating ring.

[0009] Furthermore, the insulating baffle is arranged in a ring shape, and an annular isolation plate is arranged on the inner circle side of the insulating baffle, and the isolation plate is used to isolate the side wall of the stator winding from the motor housing.

[0010] Furthermore, the insulating baffle and the isolation plate are both arranged with a gap between the stator winding and the motor housing.

[0011] Furthermore, the fuel injection seat is provided with a mounting groove for mounting an isolation ring, and the fuel injection nozzles are evenly arranged on the mounting groove.

[0012] Furthermore, the oil injection nozzle is inclined toward the stator winding.

[0013] Furthermore, a plurality of oil inlets corresponding to the oil inlet holes are arranged at the bottom of the outer side wall of the oil injection seat, and the oil inlets are connected to the internal oil passage.

[0014] In summary, the present invention comprises at least one of the following beneficial effects:

[0015] 1. The installation position of the oil injection ring remains unchanged and is still matched with the motor housing in the radial direction. The oil injection ring forms a wrapping protection for the motor winding end. At this time, the insulation protection of the stator winding and the motor housing can be formed by the oil injection ring to prevent the stator end from discharging to the motor housing;

[0016] 2. The oil spray nozzle is facing the winding at an angle, which can increase the cooling area of ​​the winding by the cooling oil and improve the cooling effect of the winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0018] Figure 2 It is an exploded schematic diagram of an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the assembly of an embodiment of the present invention.

[0020] Description of reference numerals:

[0021] 1. Isolation ring; 11. Cooling oil separation ring; 12. Insulation baffle; 13. Isolation plate; 14. Oil return hole; 2. Oil spray seat; 21. Oil inlet hole; 22. Mounting groove; 23. Oil spray nozzle; 24. Oil inlet. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0023] The following is combined with Figure 1-3 The present invention is described in further detail.

[0024] The embodiment of the present invention discloses an oil injection ring with insulation function. Figure 1-Figure 3 The oil injection ring with insulation function includes an isolating ring 1 and an oil injection seat 2, wherein the isolating ring 1 is arranged on the oil injection seat 2, a cooling oil separation ring 11 is arranged on the outer wall of the isolating ring 1, an insulating baffle 12 for separating the motor housing and the stator winding end is arranged on the end of the isolating ring 1 away from the oil injection seat 2, a plurality of oil inlet holes 21 are arranged on the side wall of the oil injection seat 2, and a plurality of oil inlet holes 21 are arranged on the oil injection seat 2 for spraying oil to the stator winding. The oil spray nozzle 23 is provided with an oil return hole 14 on the side wall of the isolation ring 1. The coolant enters the oil spray seat 2 through the oil inlet hole 21 and is sprayed toward the stator winding through the oil spray nozzle 23 to cool the stator winding. After the cooling is completed, the oil flows out through the oil return hole 14 on the side wall of the isolation ring 1, and the end of the stator winding is wrapped by the insulating baffle 12 to separate the end of the stator winding from the motor housing. The end of the stator winding can be insulated and protected to prevent the motor housing from discharging to the end of the stator winding.

[0025] In this embodiment, the insulating baffle 12 is arranged in a ring shape, and an annular isolation plate 13 is arranged on the inner circle side of the insulating baffle 12. The isolation plate 13 is used to isolate the side wall of the stator winding and the motor housing. The isolation plate 13 can isolate the side wall of the stator winding and the motor housing, so that the isolation ring 1 can wrap the stator winding for protection, thereby preventing the motor housing from discharging the stator winding.

[0026] In this embodiment, the insulating baffle 12 and the isolation plate 13 are set with a gap between the stator winding and the motor housing. The distance between the end of the stator winding and the motor housing can be about 4 mm. The thickness of the isolation ring 1 is 1.5 mm, which can avoid contact between the insulating baffle 12 and the isolation plate 13 and the stator winding and the motor housing, and at the same time can reduce the assembly layout space, reduce the volume, and reduce the assembly weight.

[0027] In this embodiment, the fuel injection seat 2 is provided with a mounting groove 22 for mounting the isolation ring 1, and the fuel injection nozzles 23 are evenly arranged on the mounting groove 22. The fuel injection nozzles 23 are located on the inner side of the isolation ring 1, which is convenient for installing the isolation ring 1 and can play a positioning role in the installation of the isolation ring 1.

[0028] In this embodiment, the oil spray nozzle 23 is tilted toward the stator winding, which can increase the cooling area of ​​the winding by the cooling oil and improve the cooling effect of the winding.

[0029] In this embodiment, a plurality of oil inlets 24 corresponding to the oil inlet holes 21 are disposed at the bottom of the outer wall of the oil injection seat 2, and the oil inlets 24 are communicated with the internal oil passage.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An oil injection ring with insulation function, characterized in that: The invention comprises an isolating ring (1) and an oil spray seat (2), wherein the isolating ring (1) is arranged on the oil spray seat (2), a cooling oil separation ring (11) is arranged on the outer wall of the isolating ring (1), an insulating baffle (12) for isolating a motor housing and an end of a stator winding is arranged on the end of the isolating ring (1) away from the oil spray seat (2), a plurality of oil inlet holes (21) are arranged on the side wall of the oil spray seat (2), a plurality of oil spray nozzles (23) corresponding to the oil inlet holes (21) for spraying oil into the stator winding are arranged on the oil spray seat (2), and an oil return hole (14) is arranged on the side wall of the isolating ring (1).

2. The oil injection ring with insulation function according to claim 1, characterized in that: The insulating baffle (12) is arranged in an annular shape, and an annular isolation plate (13) is arranged on the inner circular side of the insulating baffle (12), and the isolation plate (13) is used to isolate the side wall of the stator winding from the motor housing.

3. The oil injection ring with insulation function according to claim 2, characterized in that: The insulating baffle (12) and the isolation plate (13) are both arranged with gaps between the stator winding and the motor housing.

4. The oil injection ring with insulation function according to claim 1, characterized in that: The fuel injection seat (2) is provided with a mounting groove (22) for mounting the isolation ring (1), and the fuel injection nozzles (23) are evenly arranged on the mounting groove (22).

5. The oil injection ring with insulation function according to claim 1, characterized in that: The oil injection nozzle (23) is inclined toward the stator winding.

6. The oil injection ring with insulation function according to claim 5, characterized in that: The bottom of the outer wall of the oil injection seat (2) is provided with a plurality of oil inlet ports (24) corresponding one-to-one to the oil inlet holes (21), and the oil inlet ports (24) are connected to the internal oil passage.

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