Sealing structure of motor water cooling flow channel and motor

Abstract

The utility model relates to the technical field of motors, in particular to a sealing structure of a motor water-cooling flow channel and a motor, the motor comprises a casing and end covers arranged at two ends of the casing, the casing comprises an inner casing and an outer casing, the outer casing penetrates through the inner casing along the axial direction, and a water-cooling flow channel is formed between the outer casing and the inner casing. The sealing structure comprises a first sealing ring and a second sealing ring; the first sealing ring is arranged between the outer peripheral wall of the inner shell and the inner peripheral wall of the outer shell in a sleeved mode and is pressed between the inner shell and the outer shell in the radial direction. The second sealing ring is arranged between the inner end face of the end cover and the end face of the inner shell and axially pressed between the inner shell and the end cover. Therefore, even if the first sealing ring is damaged and loses efficacy, and the cooling water in the water cooling flow channel leaks from the joint of the inner shell and the outer shell, the second sealing ring can prevent the leaked water from flowing into the motor from the joint of the end cover and the inner shell, so that the sealing reliability of the whole water cooling flow channel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a sealing structure of a water-cooling channel of a motor and a motor. Background Art

[0002] As a commonly used driving component, motors are widely used in various fields. Since motors generate a lot of heat when working, they can be easily damaged if heat is not dissipated. Therefore, existing motors are generally equipped with a heat dissipation mechanism. According to the different heat dissipation methods of the motors, there are mainly air cooling and water cooling.

[0003] Among them, water-cooling heat dissipation mainly sets a water-cooling channel in the casing. When working, cooling water flows through the water-cooling channel, thereby carrying away the heat emitted by the motor to achieve the purpose of heat dissipation.

[0004] In the related art, for this type of motor with a water-cooling channel, its structure mainly includes a casing and end covers provided at both ends of the casing; the water-cooling channel is provided in the casing, specifically, the casing includes an inner casing and an outer casing that are inserted into each other, and an interlayer is provided between the inner casing and the outer casing to be used as a water-cooling channel. In order to ensure the sealing of the water-cooling channel, a sealing ring is generally provided at the joint between the inner casing and the outer casing to form a seal; however, this sealing method still has shortcomings. If the sealing ring is damaged and cannot form a seal, the cooling water will flow out from the joint between the inner casing and the outer casing, and then flow into the interior of the motor along the joint between the end cover and the casing, damaging the components inside the motor, and therefore needs to be improved. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide a sealing structure for a water-cooling channel of a motor and a motor.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] On the one hand, the utility model provides a sealing structure for a water-cooling channel of a motor, wherein the motor includes a casing and end covers arranged at both ends of the casing, the casing includes an inner casing and an outer casing, the outer casing is axially inserted into the inner casing and forms a water-cooling channel with the inner casing, and the sealing structure includes a first sealing ring and a second sealing ring; the first sealing ring is arranged between the outer circumferential wall of the inner casing and the inner circumferential wall of the outer casing, and is radially pressed between the inner casing and the outer casing; the second sealing ring is arranged between the inner end face of the end cover and the end face of the inner casing, and is axially pressed between the inner casing and the end cover.

[0008] As an optional embodiment of the present invention, a first embedding groove for embedding the first sealing ring is provided on the outer circumferential wall of the inner shell or the inner circumferential wall of the outer shell; and / or a second embedding groove for embedding the second sealing ring is provided on the inner end surface of the end cover or the end surface of the inner shell.

[0009] As an optional embodiment of the present invention, the sealing structure further includes a third sealing ring, which is arranged between the inner end face of the end cover and the end face of the outer shell and is axially compressed between the end cover and the outer shell.

[0010] As an optional implementation manner of the present invention, a third embedding groove for embedding a third sealing ring is provided on the inner end surface of the end cover or the end surface of the outer shell.

[0011] On the other hand, the utility model provides a motor, including a casing and end covers arranged at both ends of the casing, the casing including an inner casing and an outer casing, the outer casing is axially inserted into the inner casing and is spaced apart from the inner casing to form a water-cooling channel; the casing also includes a water inlet and a water outlet connected to the water-cooling channel; the motor also includes the above-mentioned sealing structure of the motor water-cooling channel.

[0012] As an optional embodiment of the present invention, a sandwich cavity is formed between the inner shell and the outer shell, and a plurality of ribs are provided in the sandwich cavity and arranged in sequence along the circumference of the sandwich cavity. The ribs extend along the axial direction of the sandwich cavity, and the water-cooling channel is formed by spacing between adjacent ribs; a notch is formed at one end of the rib, and a through hole is opened at the other end.

[0013] As an optional implementation manner of the present invention, the water inlet is arranged on a side of the shell close to the incision, and the water outlet is arranged on a side of the shell close to the through hole.

[0014] As an optional embodiment of the present invention, a positioning structure is provided between the inner shell and the outer shell, and the positioning structure includes a positioning protrusion and a positioning groove, and one of the positioning protrusion and the positioning groove is provided on the inner shell, and the other is provided on the outer shell; when the positioning protrusion is embedded in the positioning groove, the inner shell and the outer shell maintain relative positioning in the circumferential direction.

[0015] As an optional embodiment of the present invention, it further includes a controller arranged on the casing, and the controller is used to convert direct current into alternating current.

[0016] Compared with the existing technology, the advantages of adopting this solution are:

[0017] The sealing structure provided by the utility model includes a first sealing ring and a second sealing ring. The first sealing ring is mainly used for sealing at the joint between the inner shell and the outer shell, and the second sealing ring is used for sealing at the joint between the inner shell and the end cover. In this way, even if the first sealing ring is damaged and fails, causing the cooling water in the water-cooling channel to leak out from the joint between the inner shell and the outer shell, the presence of the second sealing ring can prevent the leaked water from flowing into the interior of the motor from the joint between the end cover and the inner shell, thereby improving the sealing reliability of the entire water-cooling channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is an exploded view of the utility model;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0022] Figure 5 It is a structural schematic diagram of the inner shell of the utility model. DETAILED DESCRIPTION

[0023] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0024] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0025] Example 1

[0026] See also Figure 1-5 As shown, this embodiment provides a sealing structure, which is mainly used for the water-cooling channel 31 of the motor to prevent water in the water-cooling channel 31 from flowing into the interior of the motor.

[0027] The specific structure of the motor used in this sealing mechanism can be:

[0028] like Figure 2 As shown, the motor includes a casing 1 and end covers 2 provided at both ends of the casing 1. The casing 1 is open at both ends, and the end covers 2 are used to cover the openings at both ends of the casing 1 to serve as a front cover and a rear cover respectively.

[0029] The housing 1 comprises an inner housing 11 and an outer housing 12. The outer housing 11 is coaxially arranged with the inner housing 11, and a water cooling channel 31 is formed between the outer housing 12 and the inner housing 11. The water cooling channel 31 is mainly used for cooling water to dissipate heat from the housing 1 and, in turn, from the motor.

[0030] It is worth noting that, in this embodiment, the sealing structure mainly includes two groups, one group is arranged between the front cover 2 and the left end of the casing 1, and the other group is arranged between the rear cover 2 and the right end of the casing 1; since in this embodiment, the two sealing structures are basically the same, this embodiment will be described below using one of them as an example.

[0031] like Figure 2 and Figure 4 As shown, the sealing structure includes a first sealing ring 61 and a second sealing ring 62 .

[0032] The first sealing ring 61 is sleeved between the outer circumferential wall of the inner shell 11 and the inner circumferential wall of the outer shell 12 and is radially compressed between the inner shell 11 and the outer shell 12 to form a seal at the joint between the inner shell 11 and the outer shell 12.

[0033] The second sealing ring 62 is arranged between the inner end surface of the end cover 2 (i.e., the end surface of the end cover 2 facing the casing 1) and the end surface of the inner casing 11, and is axially compressed between the inner casing 11 and the end cover 2, so that the second sealing ring 62 can form a seal at the joint between the end cover 2 and the inner casing 11.

[0034] It can be seen that this embodiment is equivalent to forming a two-stage seal. In this way, even if the first sealing ring 61 is damaged and fails, causing the cooling water in the water-cooling channel 31 to leak out from the joint between the inner shell 11 and the outer shell 12, the presence of the second sealing ring 62 can still prevent the leaked water from flowing into the interior of the motor from the joint between the end cover 2 and the inner shell 11, thereby improving the sealing reliability of the entire water-cooling channel 31.

[0035] In addition, in this embodiment, the sealing structure also includes a third sealing ring 63, which is arranged between the inner end face of the end cover 2 and the end face of the outer shell 12, and is axially pressed between the end cover 2 and the outer shell 12 to form a seal at the joint between the outer shell 12 and the end cover 2; the presence of the third sealing ring 63 can prevent the cooling water leaking from the joint between the inner shell 11 and the outer shell 12 from flowing out from the joint between the outer shell 12 and the end cover 2 to the outside of the casing 1.

[0036] like Figure 4 As shown, in order to facilitate the positioning of the first sealing ring 61 when installing the first sealing ring 61, in this embodiment, a first embedding groove 611 for the first sealing ring 61 to be embedded is provided on the outer peripheral wall of the inner shell 11 or the inner peripheral wall of the outer shell 12; for example, in this embodiment, the first embedding groove 611 is provided on the outer peripheral wall of the inner shell 11 and surrounds the inner shell 11.

[0037] Similarly, in order to facilitate the positioning of the second sealing ring 62 and the third sealing ring 63, in this embodiment:

[0038] A second embedding groove 621 for embedding the second sealing ring 62 is formed on the inner end surface of the end cover 2 or the end surface of the inner shell 11, and a third embedding groove 631 for embedding the third sealing ring 63 is formed on the inner end surface of the end cover 2 or the end surface of the outer shell 12.

[0039] This embodiment specifically shows that the second embedding groove 621 and the third embedding groove 631 are both opened on the inner end surface of the end cover 2 and surround the end cover 2 ; the two are coaxially arranged, and the second embedding groove 621 is located inside the third embedding groove 631 .

[0040] Example 2

[0041] like Figure 1-5 As shown, this embodiment further provides a motor based on embodiment 1, including a casing 1 and end covers 2 arranged at both ends of the casing 1, the casing 1 includes an inner casing 11 and an outer casing 12, the outer casing 12 is axially inserted into the inner casing 11 and is spaced apart from the inner casing 11 to form a water-cooling channel 31.

[0042] The specific structure of the water-cooling channel 31 is as follows:

[0043] like Figure 5 As shown, a sandwich cavity 3 is formed between the inner shell 11 and the outer shell 12. For example, a recessed area is formed on the outer peripheral wall of the inner shell 11. When the outer shell 12 is sleeved on the outside of the inner shell 11, the two are surrounded at the recessed area to form a sandwich cavity 3.

[0044] The interlayer cavity 3 is provided with a plurality of ribs 4 arranged sequentially along the circumference of the interlayer cavity 3. Preferably, the ribs 4 are fixed to the outer peripheral wall of the inner shell 11. The ribs 4 extend axially along the interlayer cavity 3, and are spaced apart between adjacent ribs 4 to form the water-cooling channels 31. A notch 41 is formed at one end of the rib 4, and a through-hole 42 is formed at the other end. The through-hole 42 connects two adjacent water-cooling channels 31. All the notches 42 are located on the same side, and the through-holes 42 are located on the same side.

[0045] like Figure 3 As shown, the housing 1 further includes a water inlet 122 and a water outlet 121 that communicate with the water-cooling channel 31. In this embodiment, the water inlet 122 and the water outlet 121 are both provided on the housing 12. Preferably, the water inlet 122 is provided on the side of the housing 12 near the cutout 41, and the water outlet 121 is provided on the side of the housing 12 near the through-hole 42. In this manner, cooling water enters the interlayer cavity 3 through the water inlet 122, then flows into each water-cooling channel 31 through each through-hole 42, then flows along the water-cooling channel 31 toward the side where the cutout 41 is located, and finally flows out uniformly from the water outlet 121. During the flow of the cooling water in the water-cooling channel 31, the cooling water absorbs heat from the housing 1, thereby achieving water-cooling heat dissipation for the motor.

[0046] The motor provided in this embodiment further includes the sealing structure provided in embodiment 1. The specific structure of the sealing structure has been described in detail in embodiment 1 and will not be repeated here.

[0047] In this embodiment, bolts are axially passed through the end cover 2 and the casing 1 to fix the two together; for example, in this embodiment, the outer casing 12 and the end cover 2 are fixed together by bolts.

[0048] Since the inner shell 11 is not fixed to the end cover 2, the inner shell 11 may rotate relative to the outer shell 12 when the motor is working. Figure 4 and Figure 5 As shown, a positioning structure is provided between the inner shell 11 and the outer shell 12, and the positioning structure includes a positioning protrusion 51 and a positioning groove 52 for the positioning protrusion 51 to be embedded in. One of the positioning protrusion 51 and the positioning groove 52 is provided on the inner shell 11, and the other is provided on the outer shell 12. In this embodiment, the positioning protrusion 51 is provided on the end side of the outer wall of the inner shell 11, and the positioning groove 52 is provided on the end side of the inner wall of the outer shell 12.

[0049] When the positioning protrusion 51 is embedded in the positioning groove 52 , the inner shell 11 and the outer shell 12 maintain relative positioning in the circumferential direction under the constraints of the two, that is, the inner shell 11 and the outer shell 12 cannot rotate relative to each other.

[0050] This embodiment further includes a controller 7 provided on the housing 1 . The function of the controller 7 is to convert the input DC power into AC power for use in the power supply. The controller 7 is preferably fixed on the housing 12 .

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A sealing structure for a water-cooling channel of a motor, wherein the motor comprises a housing and end covers provided at both ends of the housing, the housing comprising an inner housing and an outer housing, the outer housing being axially sleeved on the inner housing and forming a water-cooling channel between the outer housing and the inner housing, characterized in that: The sealing structure includes a first sealing ring and a second sealing ring; the first sealing ring is arranged between the outer circumferential wall of the inner shell and the inner circumferential wall of the outer shell, and is radially compressed between the inner shell and the outer shell; the second sealing ring is arranged between the inner end face of the end cover and the end face of the inner shell, and is axially compressed between the inner shell and the end cover.

2. The sealing structure of a motor water-cooling channel according to claim 1, characterized in that: A first embedding groove for embedding the first sealing ring is formed on the outer peripheral wall of the inner shell or the inner peripheral wall of the outer shell; and / or a second embedding groove for embedding the second sealing ring is formed on the inner end surface of the end cover or the end surface of the inner shell.

3. The sealing structure of a motor water-cooling channel according to claim 1, characterized in that: The sealing structure further includes a third sealing ring, which is arranged between the inner end surface of the end cover and the end surface of the outer shell and is axially compressed between the end cover and the outer shell.

4. The sealing structure of a motor water-cooling channel according to claim 2, characterized in that: A third embedding groove for embedding the third sealing ring is provided on the inner end surface of the end cover or the end surface of the outer shell.

5. The motor is characterized in that The motor comprises a casing and end covers arranged at both ends of the casing, the casing comprises an inner casing and an outer casing, the outer casing is axially inserted into the inner casing and is spaced apart from the inner casing to form a water-cooling channel; the casing also comprises a water inlet and a water outlet connected to the water-cooling channel; the motor also comprises a sealing structure for the motor water-cooling channel as described in any one of claims 1 to 4.

6. The motor according to claim 5, characterized in that A sandwich cavity is formed between the inner shell and the outer shell, and a plurality of ribs are arranged in sequence along the circumference of the sandwich cavity. The ribs extend along the axial direction of the sandwich cavity, and adjacent ribs are spaced apart to form the water-cooling flow channel; a notch is formed at one end of the rib, and a through hole is opened at the other end.

7. The motor according to claim 6, characterized in that The water inlet is arranged on a side of the shell close to the incision, and the water outlet is arranged on a side of the shell close to the through hole.

8. The motor according to claim 5, characterized in that A positioning structure is provided between the inner shell and the outer shell, and the positioning structure includes a positioning protrusion and a positioning groove, one of which is provided on the inner shell and the other is provided on the outer shell; when the positioning protrusion is embedded in the positioning groove, the inner shell and the outer shell maintain relative positioning in the circumferential direction.

9. The motor according to claim 5, characterized in that The device also includes a controller arranged on the casing, and the controller is used to convert direct current into alternating current.

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