Mixed fluid cooling motor

Abstract

The utility model discloses a mixed fluid cooling motor, and belongs to the technical field of motors. Comprising a shell assembly, and a stator assembly and a rotor assembly which are matched with each other are installed in the shell assembly; a stator oil sleeve is also fixed in the shell assembly, and the stator assembly is sleeved in an inner cavity of the stator oil sleeve; the shell assembly is provided with an outer oil duct, the two ends of the outer oil duct are communicated with the two ends of an inner cavity of the stator oil sleeve respectively, and the outer oil duct and the inner cavity form a closed circulating oil duct. And a micro oil pump communicated with the circulating oil duct is further fixed on the shell assembly and is used for driving the cooling medium in the circulating oil duct to flow. According to the utility model, the motor stator is completely soaked in the oil cooling inner cavity of the stator oil sleeve, and cooling oil is forced to circulate in the two cavities by the micro oil pump, so that the advantages of high efficiency of liquid cooling and portability and simplicity of air cooling are combined, and the heat dissipation efficiency of the motor is improved under the condition that the weight is slightly increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a mixed fluid cooling motor. BACKGROUND

[0002] The conventional cooling mode of motor mainly includes air cooling and water cooling, the air cooling motor is simple in structure, and has few accessories, but the air cooling structure has limited heat dissipation power, therefore cannot be applied to high-power and high-power density motors.

[0003] The main heat transfer route of the traditional motor is: winding → insulating paint → insulating paper → insulating paint → stator core → motor shell → cooling liquid or air, and the heat conduction mode has large thermal resistance, and the internal working temperature of the motor is high under certain working conditions. UTILITARIAN CONTENT

[0004] The utility model aims at providing a mixed fluid cooling motor, which improves the heat dissipation performance of the motor through a new heat conduction mode and reduces the risk of pipeline leakage.

[0005] The utility model adopts the following technical scheme: a mixed fluid cooling motor, comprising a shell assembly, the shell assembly is installed in a mutually matched stator assembly and rotor assembly;

[0006] The stator oil jacket is also fixed in the shell assembly, and the stator assembly is fitted in the inner cavity of the stator oil jacket;

[0007] An outer oil channel is formed on the shell assembly, and the two ends of the outer oil channel are communicated with the two ends of the inner cavity of the stator oil jacket respectively, and the outer oil channel and the inner cavity form a closed circulating oil channel;

[0008] A micro oil pump communicated with the circulating oil channel is also fixed on the shell assembly, and the micro oil pump is used to drive the cooling medium in the circulating oil channel to flow.

[0009] Further, the stator oil jacket is a double-layer cylinder, and the inner cavity is formed between the double-layer cylinder; the rear end of the double-layer cylinder is closed through an annular plate, a plurality of uniformly distributed first oil holes are formed on the annular plate; and the front end of the double-layer cylinder is open.

[0010] The stator assembly is embedded in the inner cavity of the stator oil jacket, and a plurality of uniformly distributed inner axial oil channels for the cooling medium to flow through are formed on the stator assembly.

[0011] The shell assembly comprises:

[0012] The shell is a cylindrical shell, and is coaxially arranged outside the stator assembly;

[0013] A front end cover is fixed at the front end of the shell; the stator assembly is rotationally connected with the central hole of the front end cover;

[0014] A rear end cover is fixed at the rear end of the shell; the stator assembly is rotationally connected with the central hole of the rear end cover;

[0015] The two ends of the stator oil sleeve are respectively abutted against the inner walls of the front end cover and the rear end cover; the outer oil channel is formed on the shell, the front end cover and the rear end cover.

[0016] A plurality of outer axial oil channels are formed on the shell and are uniformly distributed around the shaft center of the shell; the shell has uniformly distributed heat dissipation fins on the outer side.

[0017] A front oil groove is formed on the rear side of the front end cover and is opposite to the outer axial oil channel and the open end of the stator oil sleeve; the outer axial oil channel and the open end of the stator oil sleeve are communicated through the front oil groove.

[0018] A rear inner oil groove is formed on the front side of the rear end cover and is opposite to the outer axial oil channel; an oil inlet is formed on the rear side of the rear end cover and is communicated with the rear inner oil groove;

[0019] A rear outer oil groove is formed on the rear side of the rear end cover; a second oil hole is formed on the bottom of the rear outer oil groove and is communicated with a first oil hole of the closed end of the stator oil sleeve;

[0020] An oil baffle is fixedly sealed on the rear outer oil groove of the rear end cover; an oil outlet is formed on the oil baffle and is communicated with the rear outer oil groove;

[0021] A micro oil pump is fixed on the rear end cover; an oil inlet and an oil outlet of the micro oil pump are respectively connected with the oil outlet and the oil inlet.

[0022] A driving shaft of the micro oil pump is connected with a rotating shaft of the rotor assembly through a transmission belt.

[0023] The motor stator is completely soaked in the oil cooling inner cavity of the stator oil sleeve; the oil cooling inner cavity is connected with the oil channel of the motor shell, and the forced cooling oil in the two cavities is circulated by the micro oil pump; the heat dissipation fins are designed on the outer part of the motor shell; thus, the structure that the internal heat conduction relies on the cooling oil and the external heat dissipation relies on air is formed, so that the advantages of liquid cooling high efficiency and air cooling lightness and simplicity are combined; the route of heat conduction is shortened, the system thermal resistance is reduced, and the cooling capacity of the motor is improved; the system is simple, the occupied space is small, and the system reliability can be improved in the multi-motor driving system. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Figure 1 It is a sectional view of the mixed fluid cooling motor of the present application.

[0026] Figure 2 It is a perspective sectional structure schematic diagram of the mixed fluid cooling motor of the present application.

[0027] Figure 3 It is a perspective structure schematic diagram of the stator assembly in the present application.

[0028] Figure 4 It is a perspective structure schematic diagram of the stator oil sleeve in the present application (view angle one).

[0029] Figure 5 It is a perspective structure schematic diagram of the stator oil sleeve in the present application (view angle two).

[0030] Figure 6 It is a perspective structure schematic diagram of the housing in the present application.

[0031] Figure 7 It is a perspective structure schematic diagram of the front end cover in the present application.

[0032] Figure 8 It is a perspective structure schematic diagram of the rear end cover in the present application (view angle one).

[0033] Figure 9 It is a perspective structure schematic diagram of the rear end cover in the present application (view angle two).

[0034] Explanation of reference signs:

[0035] 1, stator assembly; 11, inner axial oil channel;

[0036] 2, rotor assembly;

[0037] 3, shell assembly; 301, outer oil channel;

[0038] 31, front end cover; 311, front oil groove;

[0039] 32, housing; 321, outer axial oil channel; 322, heat dissipation fin;

[0040] 33, rear end cover; 331, rear inner oil groove; 332, oil inlet; 333, rear outer oil groove; 334, second oil hole;

[0041] 4. Stator oil jacket; 41. Inner cavity; 42. Annular plate; 43. First oil hole;

[0042] 5. Transmission belt;

[0043] 6. Micro oil pump;

[0044] 7. Oil baffle; 71. Oil outlet. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] Example 1:

[0047] like Figures 1 to 3 As shown, the utility model provides a mixed fluid cooling motor, which includes a housing assembly 3 and a stator assembly 1, a rotor assembly 2 and a stator oil jacket 4 installed in the housing assembly 3.

[0048] The housing assembly 3 includes a cylindrical outer shell 32, which is coaxially mounted on the outside of the stator assembly 1. A front cover 31 is fixed to the front end of the outer shell 32, and a rear cover 33 is fixed to the rear end of the outer shell 32. The two ends of the stator assembly 1 are rotatably connected to the center holes of the front cover 31 and the rear cover 33, respectively.

[0049] Recombination Figures 1 to 3 As shown, the stator oil jacket 4 is coaxially sleeved in the outer shell 32. The stator oil jacket 4 is a double-layer cylinder with an open front end and a closed rear end by an annular plate 42. The annular plate 42 is provided with a plurality of evenly distributed first oil holes 43. The two ends of the stator oil jacket 4 are fixedly connected to the inner walls of the front cover 31 and the rear cover 33 respectively; an inner cavity 41 is formed between the annular plate 42, the double-layer cylinder and the front cover 31. The stator assembly 1 is embedded in the inner cavity 41, and evenly distributed inner axial oil channels 11 are provided on the stator assembly 1. The cooling medium at both ends of the inner cavity 41 can flow through the inner axial oil channels 11 on the stator assembly 1, thereby taking away the heat of the stator assembly 1.

[0050] Combine Figure 1 and Figure 2As shown in the drawings, the outer oil channel 301 is formed on the shell 32, the front end cover 31 and the rear end cover 33, and the two ends of the outer oil channel 301 are communicated with the open end of the stator oil jacket 4 and the first oil hole 43 respectively, and the outer oil channel 301 and the inner cavity 41 form a closed circulating oil channel. The micro oil pump 6 is fixed on the rear end cover 33 and communicated with the circulating oil channel, and under the action of the micro oil pump 6, the cooling medium circulates and flows between the outer oil channel 301 and the inner cavity 41.

[0051] The utility model fully immerses the motor stator in the oil cooling inner cavity 41 of the stator oil jacket, and forms the outer oil channel 301 communicated with the inner cavity 41 on the shell assembly 3;When working, the cooling oil is forced to circulate in the inner cavity 41 and the outer oil channel 301 by the micro oil pump 6, so as to form the structure that the internal heat conduction relies on the cooling oil and the external heat dissipation relies on the air, shorten the route of the internal heat conduction of the motor, improve the heat dissipation performance of the motor and reduce the risk of pipeline leakage.

[0052] Embodiment two:

[0053] On the basis of the above-mentioned embodiment one, the embodiment two provides a specific outer oil channel 301 structure;

[0054] Combined with Figure 1 , Figure 2 and Figure 6 As shown in the drawings, a plurality of outer axial oil channels 321 are uniformly distributed around the axis of the shell 32 on the shell 32;A plurality of oil grooves are formed on the end face of the shell 32 for connecting the adjacent outer axial oil channels 321;Uniformly distributed heat dissipation fins 322 are arranged on the outer side of the shell 32 to improve the efficiency of the shell 32 to dissipate heat outward.

[0055] Combined with Figure 1 , Figure 2 and Figure 7 As shown in the drawings, the rear side of the front end cover 31 is provided with a front oil groove 311, and the front oil groove 311 is opposite to the outer axial oil channel 321 and the open end of the stator oil jacket 4, so that the outer axial oil channel 321 and the open end of the stator oil jacket 4 are connected through the front oil groove 311.

[0056] Combined with Figure 1 , Figure 2 and Figure 8 , Figure 9 As shown in the drawings, the front side of the rear end cover 33 is provided with a rear inner oil groove 331 opposite to the outer axial oil channel 321, and the rear side of the rear end cover 33 is provided with an oil inlet 332 communicated with the rear inner oil groove 331;The cooling oil entering through the oil inlet 332 can enter the outer axial oil channel 321 through the rear inner oil groove 331;

[0057] A rear outer oil groove 333 is defined on the rear side of the rear end cover 33. A second oil hole 334 is defined at the bottom of the rear outer oil groove 333. The second oil hole 334 is opposite to and communicates with the first oil hole 43 at the closed end of the stator oil jacket 4. This allows cooling oil in the inner cavity 41 of the stator oil jacket 4 to enter the rear outer oil groove 333 through the first oil hole 43 and the second oil hole 334.

[0058] The oil baffle plate 7 is sealed and fixed outside the rear outer oil groove 333. An oil outlet 71 connected to the rear outer oil groove 333 is opened on the oil baffle plate 7; the cooling oil in the rear outer oil groove 333 flows out through the oil outlet 71;

[0059] The micro oil pump 6 is fixed on the rear end cover 33, and the oil inlet and oil outlet of the micro oil pump 6 are respectively connected to the oil outlet 71 and the oil inlet 332; under the action of the micro oil pump 6, the cooling oil flowing out of the oil outlet 71 enters the oil inlet 332 again, so that the cooling oil circulates between the inner cavity 41 and the outer oil channel 301.

[0060] Example 3:

[0061] Based on the above embodiment 2, combined with Figure 1 As shown, in this embodiment, the drive shaft of the micro oil pump 6 is connected to the rotating shaft of the rotor assembly 2 through the transmission belt 5, and the micro oil pump 6 is driven by the power of the motor when it is started, so as to realize the circulation of the cooling oil between the inner cavity 41 and the outer oil channel 301.

[0062] Working process:

[0063] Combine Figures 1 to 9 As shown, when the motor is started, the rotor assembly 2 rotates to drive the micro oil pump 6, which absorbs oil through the oil outlet 71 and discharges oil from the oil inlet 332; the cooling oil enters the rear inner oil groove 331, then flows through the outer axial oil channel 321, and the cooling oil dissipates heat through the outer shell 32 and the heat dissipation fins 322; the cooling oil after heat dissipation passes through the front oil groove 311, enters the inner cavity 41, and then passes through the inner axial oil channel 11 in the stator assembly 1, taking away the heat of the rotor assembly 2; the heated cooling oil passes through the first oil hole 43 and the second oil hole 334 into the rear outer oil groove 333, and is driven by the micro oil pump 6 to continue to circulate.

[0064] The utility model adds a stator oil jacket, and a micro oil pump forces cooling oil to circulate between the inner cavity of the stator oil jacket and the outer oil channel of the casing, forming a structure in which internal heat conduction relies on cooling oil and external heat dissipation relies on air. This combines the advantages of high efficiency of liquid cooling and lightness and simplicity of air cooling, and is particularly suitable for aviation motors, such as helicopter tail rotor motors and e-VTOL drive motors.

[0065] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A mixed fluid cooled motor, comprising a housing assembly (3), wherein a stator assembly (1) and a rotor assembly (2) are mounted in the housing assembly (3); Its characteristics are: A stator oil jacket (4) is also fixed in the housing assembly (3), and the stator assembly (1) is sleeved in the inner cavity (41) of the stator oil jacket (4); The housing assembly (3) is provided with an external oil passage (301), the two ends of the external oil passage (301) are respectively connected to the two ends of the inner cavity (41) of the stator oil sleeve (4), and the external oil passage (301) and the inner cavity (41) form a closed circulating oil passage; A micro oil pump (6) in communication with the circulating oil channel is also fixed on the housing assembly (3), and the micro oil pump (6) is used to drive the flow of the cooling medium in the circulating oil channel.

2. A mixed fluid cooled motor according to claim 1, characterized in that: The stator oil jacket (4) is a double-layer cylinder, and the inner cavity (41) is formed between the double-layer cylinders; the rear end of the double-layer cylinder is closed by an annular plate (42), and the annular plate (42) is provided with a plurality of evenly distributed first oil holes (43); the front end of the double-layer cylinder is open.

3. The mixed fluid cooling motor according to claim 1, characterized in that: The stator assembly (1) is embedded in the inner cavity (41) of the stator oil jacket (4), and the stator assembly (1) is provided with uniformly distributed inner axial oil passages (11) for the cooling medium to flow through.

4. A mixed fluid cooled motor according to claim 2, characterized in that: The housing assembly (3) comprises: A cylindrical housing (32) is coaxially arranged outside the stator assembly (1); A front end cover (31) is fixed to the front end of the housing (32); the stator assembly (1) is rotatably connected to the center hole of the front end cover (31); A rear end cover (33) is fixed to the rear end of the housing (32); the stator assembly (1) is rotatably connected to the center hole of the rear end cover (33); The two ends of the stator oil sleeve (4) respectively abut against the inner walls of the front cover (31) and the rear cover (33); the outer oil passage (301) is opened on the housing (32), the front cover (31) and the rear cover (33).

5. The mixed fluid cooling motor according to claim 4, characterized in that: The outer shell (32) is provided with a plurality of outer axial oil passages (321) evenly distributed around the axis of the outer shell (32), and the outer side of the outer shell (32) is provided with evenly distributed heat dissipation fins (322).

6. The mixed fluid cooled motor according to claim 5, characterized in that: A front oil groove (311) is provided on the rear side of the front end cover (31) and is opposite to the outer axial oil passage (321) and the open end of the stator oil sleeve (4). The outer axial oil passage (321) and the open end of the stator oil sleeve (4) are connected through the front oil groove (311).

7. The mixed fluid cooled motor according to claim 5, characterized in that: A rear inner oil groove (331) opposite to the outer axial oil passage (321) is formed on the front side of the rear end cover (33); an oil inlet (332) communicating with the rear inner oil groove (331) is formed on the rear side of the rear end cover (33); A rear outer oil groove (333) is provided on the rear side of the rear end cover (33), and a second oil hole (334) corresponding to the first oil hole (43) at the closed end of the stator oil sleeve (4) is provided at the bottom of the rear outer oil groove (333); An oil baffle plate (7) is sealed and fixed on the rear outer oil groove (333) of the rear end cover (33), and an oil outlet (71) communicating with the rear outer oil groove (333) is formed on the oil baffle plate (7); The micro oil pump (6) is fixed on the rear end cover (33), and the oil inlet and the oil outlet of the micro oil pump (6) are respectively connected to the oil outlet (71) and the oil inlet (332).

8. The mixed fluid cooled motor according to claim 1, characterized in that: The drive shaft of the micro oil pump (6) is connected to the rotating shaft of the rotor assembly (2) via a transmission belt (5).

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