Liquid cooling motor

Abstract

The utility model discloses a liquid cooling motor, which comprises a shell, a front end cover and a rear end cover, the front end cover and the rear end cover are fixedly arranged at two ends of the shell respectively, a cooling ring is fixedly sleeved on the outer side of the shell, and an annular cooling water channel is arranged on the inner side of the cooling ring in an outward concave manner. A water inlet hole and a water outlet hole which are communicated with the annular cooling water channel are formed in the cooling ring, a water separation block is fixedly arranged in the annular cooling water channel and located between the water inlet hole and the water outlet hole, and the interior of the annular cooling water channel is separated through the water separation block. A sealing mechanism is arranged between the inner side of the cooling ring and the outer side of the shell; the utility model has the advantages of simple structure, easy processing, low cost, convenient replacement or adjustment of cooling water, convenient cleaning, prolonged service life of parts, and improved efficiency and reliability of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a liquid-cooled motor. Background Art

[0002] The motor generates heat during operation. Overheating will affect the operating efficiency and even burn the motor. Therefore, the motor needs to be cooled. Especially with the rise of electric vehicles, high-power motors are needed, which puts higher requirements on the heat dissipation of the motor.

[0003] At present, liquid-cooled motors on new energy vehicles generally use two cooling methods: water cooling and oil cooling. The water cooling device used in the liquid-cooled motors in the prior art is generally fixed to the motor housing with an integrated structure. When cleaning scale, the entire motor housing and cooling device need to be replaced, which is cumbersome to disassemble and inconvenient to clean. The oil cooling device has high requirements for the cleanliness of the cooling oil. If there are metal impurities inside, it is easy to damage the insulation of the stator and rotor. The existing cooling oil often contains various impurities. During the use of the motor, the impurities in the oil will block the cooling flow channel. Generally, it is necessary to equip it with a filter or remove the entire motor housing and cooling device for cleaning. In summary, the liquid-cooled motors in the prior art have the problem that the flow channel of the cooling device is inconvenient to clean, which easily causes the flow channel to be blocked. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a liquid-cooled motor which has a simple structure, is easy to process, is convenient to maintain and has good heat dissipation uniformity.

[0005] A liquid-cooled motor comprises a shell and a front end cover and a rear end cover respectively fixedly arranged at both ends of the shell, a cooling ring is fixedly sleeved on the outer side of the shell, an annular cooling water channel is recessed on the inner side of the cooling ring, a water inlet hole and a water outlet hole connected to the annular cooling water channel are opened on the cooling ring, a water baffle is fixedly arranged in the annular cooling water channel between the water inlet hole and the water outlet hole, the water baffle blocks isolate the interior of the annular cooling water channel, and a sealing mechanism is arranged between the inner side of the cooling ring and the outer side of the shell.

[0006] The housing is provided with a stator, a rotor and a rotating shaft from outside to inside in sequence, a first gap is formed between the outer side of the stator and the inner wall of the housing, a second gap is formed between the inner side of the stator and the rotor, a plurality of radial oil holes are evenly opened in the circumferential direction on the portion of the stator winding coil protruding from the stator, the first gap, the oil holes and the second gap are interconnected to form a first oil cooling circuit. The cooling oil can flow directly through the oil holes in the central part of the winding coil, effectively reducing the temperature of the stator winding coil, facilitating rapid conduction and dissipation of heat energy, thereby avoiding overheating of the stator winding coil and reducing thermal damage, while the cooling oil dissipates heat and cools the stator and rotor via the first oil cooling circuit, thereby increasing the service life of the components and achieving a good cooling effect.

[0007] A third gap is formed between the front end of the winding coil of the stator and the front end cover, and the third gap is connected to the first oil cooling circuit. The third gap is connected to the first oil cooling circuit to further dissipate heat and cool the stator and the rotor.

[0008] Annular blades are fixedly arranged at both ends of the rotor, and the annular blades are sleeved on the rotating shaft. When the rotor rotates, the annular blades are driven to rotate around the rotating shaft, so that the cooling oil forms a circulation inside the motor, thereby improving the temperature distribution uniformity of the winding coil and the heat resistance of the insulating material.

[0009] An impurity storage groove is provided on the inner wall of the shell axially outwardly recessed, and an oil change hole is provided on the shell at the impurity storage groove. The impurity storage groove can effectively capture and store impurities, has a simple structure, low cost, is easy to clean and maintain, reduces the burden of equipped filters, improves cleanliness, and can better protect the stator and rotor and increase service life. An oil change hole is provided on the shell at the impurity storage groove, which can regularly remove impurities and facilitate oil replacement and maintenance. Workers can easily discharge aged or contaminated oil through the oil change hole to ensure the cleanliness and efficiency of the lubrication system, and also facilitate routine inspection and maintenance of the motor, reduce downtime, and improve production efficiency.

[0010] The sealing mechanism is an annular sealing ring.

[0011] Compared with the prior art, the utility model has the advantage that a cooling ring is fixedly sleeved on the outer side of the shell, a water inlet hole and a water outlet hole connected to the annular cooling water channel are opened on the cooling ring, and the inside of the annular cooling water channel is separated by a water barrier block. The structure is simple, easy to process, and low in cost. The cooling water can flow directly around the heating part of the motor, greatly improving the heat dissipation efficiency. The cooling water can be conveniently replaced or adjusted through the water inlet hole and the water outlet hole. The disassembly is simple and the cleaning is convenient, which extends the service life of the components and improves the efficiency and reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional schematic diagram of a liquid-cooled motor of the utility model;

[0013] Figure 2 This is an overall structural diagram of a liquid-cooled motor of the utility model;

[0014] Figure 3 It is a partial structural schematic diagram of a liquid-cooled motor of the utility model;

[0015] Figure 4 It is a partial structural cross-sectional view of a liquid-cooled motor of the utility model;

[0016] Figure 5 This is a schematic structural diagram of a cooling ring of a liquid-cooled motor of the utility model;

[0017] Figure 6 This is a schematic structural diagram of a stator of a liquid-cooled motor of the utility model;

[0018] Figure 7 This is a schematic diagram of the oil cooling circuit of the second embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Embodiment 1: A liquid-cooled motor comprises a shell 1 and a front end cover 2 and a rear end cover 3 respectively fixedly arranged at two ends of the shell 1, a cooling ring 11 is fixedly sleeved on the outer side of the shell 1, an annular cooling water channel 111 is recessed on the inner side of the cooling ring 11, a water inlet hole 112 and a water outlet hole 113 connected to the annular cooling water channel 111 are opened on the cooling ring 11, a water baffle 114 is fixedly arranged in the annular cooling water channel 111 between the water inlet hole 112 and the water outlet hole 113, the water baffle 114 isolates the inside of the annular cooling water channel, and an annular sealing ring 115 is arranged between the inner side of the cooling ring 11 and the outer side of the shell 1.

[0021] The housing 1 is provided with a stator 4, a rotor 5 and a rotating shaft 6 in order from the outside to the inside. A first gap 41 is formed between the outer side of the stator 4 and the inner wall of the housing 1, and a second gap 42 is formed between the inner side of the stator 4 and the rotor 5. A plurality of radial oil holes 44 are evenly formed in the circumferential direction on the portion of the winding coil 43 of the stator 4 protruding from the stator 4. The first gap 41, the oil holes 44 and the second gap 42 are interconnected to form a first oil cooling circuit. The first oil cooling circuit is as shown in FIG. Figure 1 As indicated by the arrow in .

[0022] Annular blades 51 are fixedly provided at both ends of the rotor 5 , respectively, and the annular blades 51 are sleeved on the rotating shaft 6 .

[0023] An impurity storage groove 12 is provided on the inner wall of the housing 1 and is recessed outwardly along the axial direction. An oil changing hole 13 is provided on the housing 1 at the impurity storage groove 12 .

[0024] Embodiment 2: The rest is the same as Embodiment 1, except that a third gap 45 is formed between the front end of the winding coil 43 of the stator 4 and the front end cover 2, and the third gap 45 is connected to the first oil cooling circuit. Specifically, the oil cooling circuit is as follows Figure 2 As indicated by the arrow in .

Claims

1. A liquid-cooled motor, comprising a housing and a front cover and a rear cover respectively fixedly arranged at both ends of the housing, characterized in that A cooling ring is provided on the outer fixed sleeve of the shell, and an annular cooling water channel is provided on the inner side of the cooling ring, which is recessed outward. A water inlet hole and a water outlet hole connected to the annular cooling water channel are provided on the cooling ring. A water barrier is fixedly provided in the annular cooling water channel between the water inlet hole and the water outlet hole, and the water barrier separates the interior of the annular cooling water channel. A sealing mechanism is provided between the inner side of the cooling ring and the outer side of the shell.

2. A liquid-cooled motor according to claim 1, characterized in that The housing is provided with a stator, a rotor and a rotating shaft in sequence from the outside to the inside, a first gap is formed between the outer side of the stator and the inner wall of the housing, a second gap is formed between the inner side of the stator and the rotor, a portion of the winding coil of the stator protruding from the stator is evenly provided with a plurality of radial oil holes in an annular direction, the first gap, the oil holes and the second gap are interconnected to form a first oil cooling circuit.

3. A liquid-cooled motor according to claim 2, characterized in that A third gap is formed between the front end of the winding coil of the stator and the front end cover, and the third gap is connected to the first oil cooling circuit.

4. A liquid-cooled motor according to any one of claims 2 to 3, characterized in that Annular blades are fixedly arranged at both ends of the rotor, and the annular blades are sleeved on the rotating shaft.

5. A liquid-cooled motor according to claim 1, characterized in that An impurity storage groove is provided on the inner wall of the shell body in an axially outwardly recessed manner, and an oil changing hole is provided on the shell body at the impurity storage groove.

6. A liquid-cooled motor according to claim 1, characterized in that The sealing mechanism is an annular sealing ring.

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