Stator bearing mechanism and oil-cooled birotor axial flux motor

Abstract

The invention relates to the technical field of motors, in particular to a stator bearing mechanism and an oil-cooled birotor axial flux motor, which comprises a shell, a force transmission mechanism arranged in the shell in a sliding manner, bearing bodies symmetrically arranged on two sides of the force transmission mechanism, and an oil duct ring arranged in the shell in a sliding manner, the force transmission mechanism comprises a plurality of arc-shaped sections and connecting blocks which are connected in sequence, and force transmission needles are arranged on the arc-shaped sections; the supporting body comprises a V-shaped winding and an arched winding arranged on the V-shaped winding, and further comprises a winding triangular piece arranged in the V-shaped winding, and a containing channel is formed in the winding triangular piece; the oil duct ring comprises an abutting ring and an outer fixing ring arranged on the abutting ring, and the oil-cooling double-rotor axial flux motor adopting the stator bearing mechanism has a good heat dissipation effect and a good force transmission effect in use, is convenient to assemble and good in product heat resistance, and meanwhile can keep the light weight of the whole structure.

Description

Technical Field

[0001] The invention relates to the technical field of motors, in particular to a stator bearing mechanism and an oil-cooled dual-rotor axial flux motor. Background Art

[0002] Axial flux has been widely valued in the field of motors, and coreless disc-type AC permanent magnet synchronous motors will be widely used. However, the problem with this type of motor is that it is difficult to cool and fix the stator. In order to improve power density and torque density, the coreless axial flux motor adopts a dual rotor and an intermediate coreless stator structure. The stator adopts a coreless structure, which makes fixation and heat dissipation problems that need to be solved for this type of stator structure, and also involves the insulation problem between the stator and the motor housing. The common method is to bond the stator and the motor housing together through epoxy resin curing glue. Because the thermal conductivity of epoxy resin is not high, the thermal conductivity and heat dissipation performance are poor. At the same time, when the temperature of the motor winding exceeds the curing temperature of epoxy resin, the curing performance of epoxy resin decreases, which directly threatens the reliability of the motor. Therefore, heat dissipation and curing strength become a pair of contradictions. Overall curing can solve the problem of stator fixation, but cannot solve the stator heat dissipation requirements, and cannot meet the requirements of lightweight and high power density of motors.

[0003] In order to solve the heat dissipation and solidification problems of a dual-rotor axial flux motor, the present invention proposes a stator bearing mechanism and an oil-cooled dual-rotor axial flux motor. Summary of the invention

[0004] In view of the problems of heat dissipation, insulation and fixation of the axial flux coreless motor mentioned above or in the prior art, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a stator support mechanism and an oil-cooled dual-rotor axial flux motor.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a stator bearing mechanism, including a shell, and a force transmission mechanism slidably arranged in the shell, a bearing body symmetrically arranged on both sides of the force transmission mechanism, and also including an oil channel ring slidably arranged in the shell; the force transmission mechanism includes a plurality of arc segments and connecting blocks connected in sequence, and a force transmission needle is provided on the arc segment; the bearing body includes a V-shaped winding, and an arched winding arranged on the V-shaped winding, and also includes a winding triangle arranged in the V-shaped winding, and the winding triangle is provided with a accommodating channel; the oil channel ring includes a contact ring and an external fixing ring arranged on the contact ring.

[0007] As a preferred solution of the stator bearing mechanism of the present invention, wherein: the housing includes a casing and a long threaded column arranged on the casing; an arc-shaped notch is arranged on the connecting block; and a connecting port is arranged on the outer fixing ring.

[0008] As a preferred solution of the stator bearing mechanism of the present invention, it also includes a stator inner fixed ring, which includes an inner ring body and an embedding groove arranged on the inner ring body; and a front end arc surface is arranged on the V-shaped winding.

[0009] As a preferred solution of the stator bearing mechanism of the present invention, wherein: the abutment ring is provided with an abutment groove, and the abutment groove and the surface of the arch winding match each other.

[0010] As a preferred solution of the stator bearing mechanism of the present invention, a short threaded column is provided in the housing, and a fixing opening is provided on the outer fixing ring.

[0011] As a preferred solution of the stator bearing mechanism of the present invention, a positioning block is provided in the casing, and a positioning groove is provided on the arc segment.

[0012] As a preferred solution of the stator bearing mechanism of the present invention, wherein: the force transmission pin is provided with an expansion surface.

[0013] As a preferred solution of the stator bearing mechanism of the present invention, the V-shaped winding is provided with a side arc surface.

[0014] As a preferred solution of the stator bearing mechanism of the present invention, wherein: the connecting block is provided with an inner arc surface.

[0015] The beneficial effects of the stator bearing mechanism of the present invention are as follows: the stator bearing mechanism has good heat dissipation and force transmission effects while maintaining ease of assembly, and has good insulation effect between the stator and the shell. Compared with the traditional epoxy resin curing adhesive bonding method for fixing the stator, it can be lightweight and have good heat resistance, and its fixing effect will not change when the temperature rises.

[0016] In order to solve the above technical problems, the present invention also provides the following technical solutions: an oil-cooled dual-rotor axial flux motor, comprising a stator bearing mechanism, and a rotor component rotatably arranged in the housing, and also comprising an output component fixedly arranged on the rotor component; the housing also comprises a front end cover and a rear end cover arranged at the end of the casing; the rotor component comprises a rotor yoke, and a rotor magnet arranged on the rotor yoke; the output component comprises a shaft sleeve fixedly arranged on the rotor component, and an output shaft arranged in the shaft sleeve.

[0017] The beneficial effects of the oil-cooled dual-rotor axial flux motor of the present invention are as follows: the oil-cooled dual-rotor axial flux motor using the stator bearing mechanism has good heat dissipation and force transmission effects when in use, is easy to assemble, has good heat resistance, and can also maintain the lightweight of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is the overall schematic diagram of the stator supporting mechanism.

[0020] Figure 2 It is a schematic diagram of the connection structure between the force transmission mechanism and the carrier of the stator carrier mechanism.

[0021] Figure 3 It is a schematic diagram of the structure of the housing of the stator supporting mechanism.

[0022] Figure 4 It is a schematic diagram of the structure of the force transmission mechanism of the stator supporting mechanism.

[0023] Figure 5 It is a schematic diagram of the structure of the supporting body of the stator supporting mechanism.

[0024] Figure 6 It is a schematic diagram of the structure of the oil channel ring of the stator supporting mechanism.

[0025] Figure 7 It is a schematic diagram of the planar structure of the force transmission mechanism, the bearing body and the oil channel ring of the stator bearing mechanism.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the force transmission mechanism, the bearing body and the oil channel ring of the stator bearing mechanism.

[0027] Fig. 9 It is a schematic diagram of the overall structure of the oil-cooled dual-rotor axial flux motor.

[0028] Fig.10 It is a schematic diagram of the cross-sectional structure of an oil-cooled dual-rotor axial flux motor.

[0029] In the figure: 100, housing; 101, casing; 102, short threaded column; 103, positioning block; 104, long threaded column; 105, front end cover; 106, rear end cover; 200, force transmission mechanism; 201, arc segment; 201a, positioning groove; 202, connecting block; 202a, inner arc surface; 202b, arc notch; 203, force transmission needle; 203a, expansion surface; 300, carrier; 301, V-shaped winding; 301a, front end arc surface; 301b, Side arc surface; 302, arched winding; 303, winding triangle; 303a, accommodating channel; 400, oil channel ring; 401, resistance ring; 401a, resistance groove; 402, outer fixing ring; 402a, connecting port; 402b, fixing port; 500, stator inner fixing ring; 501, inner ring body; 502, embedding groove; 600, rotor part; 601, rotor yoke; 602, rotor magnet; 700, output part; 701, output shaft; 702, bushing. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1, reference Figures 1 to 8 , is the first embodiment of the present invention, which provides a stator bearing mechanism, including a shell 100, and a force transmission mechanism 200 slidably arranged in the shell 100, bearing bodies 300 symmetrically arranged on both sides of the force transmission mechanism 200, and also including an oil channel ring 400 slidably arranged in the shell 100; in this embodiment, the force transmission mechanism 200 is arranged at the center of the shell 100, a plurality of bearing bodies 300 are arranged, and the bearing bodies 300 are equidistantly distributed on both sides of the force transmission mechanism 200, and two oil channel rings 400 are arranged and symmetrically arranged, and the bearing bodies 300 are clamped and limited by the oil channel rings 400 in cooperation with the force transmission mechanism 200.

[0034] The force transmission mechanism 200 includes a plurality of arc segments 201 and connecting blocks 202 connected in sequence, and a force transmission pin 203 is provided on the arc segment 201; in the present embodiment, a plurality of arc segments 201 and connecting blocks 202 connected in sequence are connected end to end to form a closed loop, and a force transmission pin 203 is fixedly provided at the center of each arc segment 201, and the plurality of force transmission pins 203 are distributed in a divergent manner.

[0035] The carrier 300 includes a V-shaped winding 301, an arched winding 302 arranged on the V-shaped winding 301, and a winding triangle 303 arranged in the V-shaped winding 301, and a receiving channel 303a is provided on the winding triangle 303; in this embodiment, the V-shaped winding 301 and the arched winding 302 form a triangular structure, and the stator winding is formed by the V-shaped winding 301 and the arched winding 302. The winding triangle 303 is arranged inside the triangular structure formed by the V-shaped winding 301 and the arched winding 302, and the winding triangle 303 can support the V-shaped winding 301 and the arched winding 302.

[0036] The oil channel ring 400 includes a resistance ring 401 and an outer fixing ring 402 arranged on the resistance ring 401. In the present embodiment, the resistance ring 401 is used to squeeze the surface of the carrier 300 to fix the carrier 300 on both sides of the force transmission mechanism 200. The outer fixing ring 402 is used to connect with the shell 100, and the space between the resistance ring 401 and the shell 100 can be used as an oil channel.

[0037] Since the carrier 300 is sandwiched between the two sides of the force transmission mechanism 200, the arch winding 302 is provided for the force transmission needle 203 to pass through, and at the same time, the V-shaped winding 301 is in a state of conflict with the connecting block 202. Since the V-shaped winding 301 and the arch winding 302 form a triangular structure, and the adjacent V-shaped windings 301 can conflict with each other, a larger contact area can be achieved, the force transmission effect is improved, and the carrier 300 and the force transmission mechanism 200 can be uniformly stressed. In addition, the carrier 300 and the housing 100 are isolated and supported by the force transmission mechanism 200, which can strengthen the connection between the stator and the housing 100. Creepage distance, the oil channel ring 400 fixes and supports each carrier 300, so that there is a uniform isolation space between the stator and the housing 100, which can improve the insulation. The winding triangle 303 can support the V-shaped winding 301, and transmit and disperse the force, so that the housing 100, the force transmission mechanism 200, and the carrier 300 can achieve uniform force. It should be noted that the winding triangle 303 is formed by pressing non-conductive and magnetic materials; due to the setting of the force transmission pin 203, the winding triangle 303 and the V-shaped winding 301 can transmit force to the force transmission pin 203, and the force transmission pin 203 transmits the force to the force transmission mechanism 200.

[0038] Two symmetrically arranged oil channel rings 400 cooperate with the power transmission mechanism 200 to divide the space between the stator outer ring end and the housing 100 into two spaces, forming input and output stator cooling oil channels, which can be cooled and dissipated by oil cooling.

[0039] It should be noted that the V-shaped winding 301 and the arched winding 302 together constitute a winding sector. The coils on the winding sector are wound according to a certain rule, pressed into a V shape and an arch shape by mechanical rules, and the V-shaped windings 301 are combined by the winding triangle 303 to form a winding module.

[0040] Preferably, the winding sector composed of the V-shaped winding 301 and the arched winding 302 is triangular in shape, which can save more space when arranged in the shell 100, thereby increasing the number of winding turns and thereby increasing the torque of the motor, thereby improving space utilization. Setting more windings increases the contact area of ​​the coil and can also improve the cooling effect.

[0041] Specifically, the shell 100 includes a casing 101, and a long threaded column 104 arranged on the casing 101; an arc-shaped notch 202b is provided on the connecting block 202; a connecting port 402a is provided on the outer fixing ring 402. In the present embodiment, the number of the long threaded columns 104 is half the number of the arc-shaped notches 202b, and the outer wall of the long threaded column 104 and the inner wall of the arc-shaped notch 202b are slidably connected, which can limit and fix the force transmission mechanism 200 and the casing 100. The number of the connecting ports 402a is the same as the number of the long threaded columns 104 and corresponds one to one. The inner wall of the connecting port 402a and the outer wall of the long threaded column 104 are slidably connected, which can limit and fix the oil channel ring 400 and the casing 100.

[0042] Furthermore, it also includes a stator inner fixed ring 500, which includes an inner ring body 501 and an embedding groove 502 arranged on the inner ring body 501; a front end arc surface 301a is provided on the V-shaped winding 301. In this embodiment, the embedding grooves 502 are distributed in an evenly spaced circle on the outer wall of the inner ring body 501, and the front end arc surface 301a is used to fit with the embedding grooves 502 to increase the stability between the structures and transmit force.

[0043] Among them, a contact groove 401a is provided on the contact ring 401, and the contact groove 401a and the surface of the arch winding 302 match each other. In this embodiment, a plurality of contact grooves 401a are provided at the end of the contact ring 401, and the contact groove 401a is used to fit with the surface of the arch winding 302. The setting of the contact groove 401a can increase the positioning effect of the carrier 300 and can transmit force.

[0044] Preferably, a short threaded column 102 is provided in the housing 101, and a fixing port 402b is provided on the outer fixing ring 402. In the present embodiment, the short threaded column 102 and the long threaded column 104 are arranged at intervals, and the short threaded column 102 and the fixing port 402b are arranged in a one-to-one correspondence. The arrangement of the short threaded column 102 makes it convenient for the user to fix the oil channel ring 400 by bolts. At the same time, the short threaded column 102 can also limit the oil channel ring 400 and the force transmission mechanism 200.

[0045] It should be noted that a positioning block 103 is provided in the housing 101, and a positioning groove 201a is provided on the arc segment 201. In the present embodiment, the positioning block 103 and the positioning groove 201a are arranged in a one-to-one correspondence. The arrangement of the positioning block 103 facilitates the positioning of the force transmission mechanism 200 during assembly and facilitates finding the positioning center point. At the same time, the arrangement of multiple positioning blocks 103 can also facilitate the transmission of force.

[0046] Preferably, an expansion surface 203a is provided on the force transmission needle 203. In this embodiment, the structural strength of the portion where the force transmission needle 203 connects to the arc segment 201 is improved by setting the expansion surface 203a, compensating for the problem of reduced structural strength after the positioning groove 201a is provided.

[0047] Furthermore, a side arc surface 301 b is provided on the V-shaped winding 301 . In the present embodiment, the provision of the side arc surface 301 b facilitates the formation of an oil channel, thereby improving the heat dissipation efficiency.

[0048] Furthermore, an inner arc surface 202a is provided on the connecting block 202. In the present embodiment, the inner arc surface 202a is used to fit the side arc surface 301b. The mutual fit between the two facilitates force transmission and improves structural strength and stability.

[0049] In summary, the stator supporting mechanism has good heat dissipation and force transmission effects while being easy to assemble, and has good insulation effect between the stator and the housing 100. Compared with the traditional epoxy resin curing adhesive bonding method for fixing the stator, it can be lightweight and have good heat resistance, and its fixing effect will not change when the temperature rises.

[0050] Example 2, reference Figures 1 to 10, which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides an oil-cooled dual-rotor axial flux motor, including the stator bearing mechanism in the above embodiment, and a rotor member 600 rotatably arranged in the housing 100, and also includes an output member 700 fixedly arranged on the rotor member 600; in this embodiment, the housing 100 also includes a front cover 105 and a rear cover 106 arranged at the end of the casing 101; the front cover 105 and the rear cover 106 are connected by bolts and long threaded columns 104, the rotor member 600 includes a rotor yoke 601, and a rotor magnet 602 arranged on the rotor yoke 601; the output member 700 includes a sleeve 702 fixedly arranged on the rotor member 600, and an output shaft 701 arranged in the sleeve 702, the sleeve 702 is rotatably connected to the front cover 105 and the rear cover 106 through a bearing, and the output shaft 701 is used for power output.

[0051] The rest of the structure is the same as that of Example 1.

[0052] In summary, the oil-cooled dual-rotor axial flux motor using the stator support mechanism has good heat dissipation and force transmission effects when in use, is easy to assemble, has good heat resistance, and can maintain the lightweight of the overall structure.

[0053] To test the heat dissipation performance, the machine was operated at 500N.m and 1600rpm for 30 minutes. The test results are as follows:

[0054]

[0055] After testing, the temperatures of the stator, rotor and other components of the device have been significantly reduced.

[0056] In order to test the heat dissipation performance of the stator, detect the working state of the stator under different loads and judge the thermal stability of the stator, the stator was operated for 30 minutes at 500N.m and 1600rpm, 10s at 1300N.m and 820rpm, and 5S at 1600N.m and 720rpm. The test results are as follows:

[0057] Test environment Test Results Performance evaluation before improvement Improved performance evaluation 500N.m1600rpm30min Low load / 167℃ Unstable good 1300N.m820rpm10s Medium load / 157℃ good good 1600N.m720rpm5S High load / 136℃ good good

[0058] After testing, it was found that when working under low load, medium load and high load conditions, the medium load and high load motors were able to maintain a stable state both before and after the improvement. However, through the low load motor, it was found that after working for a long time, the stator stability of the motor before the improvement was reduced. Considering that the working time under medium load and high load conditions is short, the impact on the stability of the motor stator before the improvement is relatively low.

[0059] In order to further detect the influence of high temperature on the stability of the stator, the stator was operated at 500 N.m and 1600 rpm for 15 minutes, 500 N.m and 1600 rpm for 25 minutes, and 500 N.m and 1600 rpm for 30 minutes. The test results are as follows:

[0060]

[0061] After testing, it was found that after working for a long time, the stability of the motor stator before the improvement was significantly reduced, and after working at high temperature for a long time, it would become unstable.

[0062] It should be noted that 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A stator bearing mechanism, characterized in that: It comprises a housing (100), a force transmission mechanism (200) slidably arranged in the housing (100), a bearing body (300) symmetrically arranged on both sides of the force transmission mechanism (200), and an oil channel ring (400) slidably arranged in the housing (100); The force transmission mechanism (200) comprises a plurality of arc segments (201) and a connection block (202) connected in sequence, and a force transmission pin (203) is provided on the arc segment (201); The carrier (300) comprises a V-shaped winding (301), and an arched winding (302) arranged on the V-shaped winding (301), and further comprises a winding triangle (303) arranged in the V-shaped winding (301), wherein the winding triangle (303) is provided with a containing channel (303a); The oil channel ring (400) comprises a resistance ring (401) and an outer fixing ring (402) arranged on the resistance ring (401).

2. The stator support mechanism according to claim 1, characterized in that: The housing (100) comprises a casing (101) and a long threaded column (104) arranged on the casing (101); The connecting block (202) is provided with an arc-shaped notch (202b); The outer fixing ring (402) is provided with a connecting port (402a).

3. The stator support mechanism according to claim 2, characterized in that: It also includes a stator inner fixed ring (500), which includes an inner ring body (501) and an embedding groove (502) provided on the inner ring body (501); The V-shaped winding (301) is provided with a front end arc surface (301a).

4. The stator support mechanism according to claim 3, characterized in that: The abutment ring (401) is provided with an abutment groove (401a), and the abutment groove (401a) and the surface of the arched winding (302) match each other.

5. The stator supporting mechanism according to claim 4, characterized in that: A short threaded column (102) is provided inside the housing (101), and a fixing opening (402b) is provided on the outer fixing ring (402).

6. The stator support mechanism according to claim 5, characterized in that: A positioning block (103) is provided in the housing (101), and a positioning groove (201a) is provided on the arc segment (201).

7. The stator supporting mechanism according to claim 6, characterized in that: The force transmission needle (203) is provided with an expansion surface (203a).

8. The stator supporting mechanism according to claim 7, characterized in that: The V-shaped winding (301) is provided with a side arc surface (301b).

9. The stator supporting mechanism according to claim 8, characterized in that: The connection block (202) is provided with an inner arc surface (202a).

10. An oil-cooled dual-rotor axial flux motor, characterized in that: It comprises the stator bearing mechanism according to any one of claims 2 to 9, and a rotor member (600) rotatably arranged in the housing (100), and also comprises an output member (700) fixedly arranged on the rotor member (600); The housing (100) further comprises a front end cover (105) and a rear end cover (106) arranged at the ends of the housing (101); The rotor component (600) comprises a rotor yoke (601) and a rotor magnetic steel (602) arranged on the rotor yoke (601); The output member (700) comprises a shaft sleeve (702) fixedly arranged on the rotor member (600), and an output shaft (701) arranged in the shaft sleeve (702).

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