CN209805607U - Cooling and heat-dissipating device for multi-stator motor - Google Patents
Cooling and heat-dissipating device for multi-stator motor Download PDFInfo
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- CN209805607U CN209805607U CN201920951766.6U CN201920951766U CN209805607U CN 209805607 U CN209805607 U CN 209805607U CN 201920951766 U CN201920951766 U CN 201920951766U CN 209805607 U CN209805607 U CN 209805607U
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Abstract
A cooling and heat dissipating device for a multi-stator motor belongs to the technical field of motor cooling and comprises a motor shell, a shell end cover, a stator unit and an annular plate type gas-liquid oscillation phase change heat dissipating member; the stator unit comprises a stator winding and a cooling sleeve, and the stator winding is coaxially embedded in the cooling sleeve; a layer of annular plate-type gas-liquid oscillation phase-change heat dissipation component is tightly clamped between the stator units, a circumferential petal-shaped winding micro-groove capillary channel which is connected end to end is arranged in the annular plate-type gas-liquid oscillation phase-change heat dissipation component, and an inner ring evaporation section and an outer ring condensation section of the annular plate-type gas-liquid oscillation phase-change heat dissipation component are respectively in tight contact with the stator winding and the cooling jacket; the plurality of stator units and the annular plate type gas-liquid oscillation phase change heat dissipation member are arranged layer by layer along the axial direction of the motor shell to form a sandwich structure stacked in multiple layers, and the distribution and collection of cooling oil working media in the cooling jacket can be completed by arranging the tree-shaped branched flow channel, so that high-power heat production of the stator winding is efficiently led out, and the overall heat dissipation performance of the motor shell is enhanced.
Description
Technical Field
The utility model belongs to the technical field of the motor cooling, a motor cooling heat abstractor is related to, specific cooling heat abstractor to many stator motor stator coils of high-power load that says so.
Background
The multi-stator multi-rotor motor is a development trend of future motors, has the advantages of low energy consumption, high efficiency, no harmonic pollution, stable torque and suitability for high-precision control during operation, and has great advantages in equipment volume, efficiency and unit weight power compared with the traditional single-stator single-rotor motor. However, with the obvious increase of the load of the motor, the motor loss in the running process, particularly the copper loss of the stator electromagnetic coil, continuously rises, so that the heat productivity of the motor rapidly rises. Therefore, how to effectively cool and radiate the motor so as to ensure that the motor can efficiently and stably operate within a reasonable working temperature range is a focus of development attention in the technical field of advanced motor thermal design and thermal control at present.
At present, the traditional motor heat dissipation technology has certain inherent defects, such as small heat exchange coefficient of air-cooled heat dissipation, difficulty in meeting the increasing heat dissipation load of the motor, and obvious increase of the axial length of a multi-stator motor compared with the traditional single-stator motor, so that the phenomenon of severe attenuation of the air-cooled heat dissipation along the way is more prominent, and the cooling effect of the motor is poorer; the water-cooling heat dissipation flow channel is mostly arranged on the motor shell, so that the heat in the motor is difficult to be taken away quickly; the immersed oil cooling method (such as an oil immersion method and a splash method) has good heat dissipation effect but larger running resistance, and particularly for a multi-stator motor with multi-electromagnetic coil windings, the flowing distance is longer, so that the flowing resistance is further increased. Therefore, in view of the structural features and high power operation characteristics of the multi-stator motor, it is urgently required to develop an efficient cooling and heat dissipating device for the high power multi-stator motor.
Chinese patent application No. 201611046485.3 utility model discloses a radiating axial magnetic flux in-wheel motor is reinforceed to winding, and the motor adopts the sandwich structure of middle stator, both sides rotor in the axial direction in this patent. The motor stator is formed by a plurality of stator tooth units in a circumferential arrangement mode, each stator tooth unit comprises a stator tooth iron core and a coil wound on the stator tooth iron core, and a superconducting flat heat pipe is arranged between every two adjacent stator tooth units. One end of the superconducting flat heat pipe is tightly contacted with the two stator tooth unit windings which clamp the superconducting flat heat pipe, and the other end of the superconducting flat heat pipe is inserted into a cooling flow channel in the stator support. Although the patent adopts the high-heat-conductivity-coefficient superconducting flat heat pipe to transfer the heat of the stator tooth iron core to the stator cooling flow channel, the cooling condition of the stator coil is improved, but a plurality of flat heat pipes are clamped between every two stator tooth units, the usable volume of a winding is occupied, the equivalent air gap is increased, the strength of a permanent magnetic field is weakened, and the torque density of the motor is reduced. More importantly, the superconducting flat heat pipes are coupled with capillary force by virtue of gravity to drive internal condensing media to flow back so as to realize circulating phase change, so that the heat transfer performance of the flat heat pipes arranged in a circumferential array in the patent is greatly reduced or even fails when the flat heat pipes work in the horizontal or inverse gravity direction (namely, the evaporation end is arranged above and the condensation end is arranged below), and therefore the problems of uneven circumferential heat dissipation of stator windings and unbalanced thermal stress of the stator windings generated along with the uneven circumferential heat dissipation of the stator windings are caused, and the working reliability of the motor is seriously influenced.
The utility model discloses a chinese patent application No. 201810724907.0 utility model discloses a compound embedment cooling structure of motor stator winding, stator core fixes at the casing inner wall in this patent the inside cooling water course that has of casing, the cooling water course covers stator core and winding overhang in the axial direction, flat type or flat plate heat pipe is arranged to hollow cylinder region circumference between winding overhang and casing, the heat absorption end and the winding overhang outer lane in close contact with of heat pipe, the cooling end is hugged closely with the casing inner wall, and adopt the insulating heat conduction's casting glue will follow the regional embedment of hollow cylinder of motor winding overhang to casing inner wall. Although the patent adopts the design of water-cooled enclosure coupled heat pipe to improve the heat dissipation of the motor winding. However, in the same way, the conventional flat or flat heat pipe mainly depends on the capillary suction force and gravity generated by the internal capillary structure as the main driving force for the backflow of the internal condensing medium, so that the heat transfer performance of the parts of the plurality of groups of circumferentially arranged heat pipes working in the horizontal or counter-gravity direction is reduced or even fails, thereby causing the circumferential heat dissipation and thermal stress unevenness of the stator winding, and endangering the working reliability of the electrode. Moreover, arrange traditional parallel type cooling water course in this patent casing, cooling medium distributes and collects the inequality in the cooling channel, and the energy quality transport efficiency is not good enough, makes its cooling effect have very big promotion space yet.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the shortcoming and not enough of above-mentioned prior art, provide a many stators motor cooling heat abstractor, the device compact structure can derive the inside heat production of many stator windings of motor high efficiency fast and disperse fast through the device to guarantee the reliable high-efficient operation of the many stator motors of high load.
The technical scheme of the utility model is that: a cooling and heat-dissipating device for a multi-stator motor comprises a motor shell consisting of a shell outer layer, a shell inner layer and a front end cover, and a shell end cover arranged on the side, with lugs, of the motor shell; the method is characterized in that: the outer layer of the shell is provided with a motor shell main oil inlet and a motor shell main oil outlet, a stator unit is arranged in the inner layer of the shell and consists of a stator winding and a cooling jacket, the stator winding is coaxially embedded in the cooling jacket, a layer of annular plate-type gas-liquid oscillation phase-change heat dissipation member is tightly clamped between each stator unit, a circumferential petal-shaped sinuous micro-groove capillary channel which is connected end to end is arranged in the annular plate-type gas-liquid oscillation phase-change heat dissipation member, the annular plate-type gas-liquid oscillation phase-change heat dissipation member is divided into an inner ring and an outer ring, the inner ring is tightly contacted with the stator winding to form an annular plate-type gas-liquid oscillation phase-change heat dissipation member evaporation section, the outer ring is tightly contacted with the cooling jacket to form an annular plate-type gas-liquid oscillation phase-change heat dissipation member condensation section, and the plurality of stator, forming a sandwich structure with multiple layers stacked; the cooling oil collection device is characterized in that tree-shaped branched runners for cooling oil distribution and collection are arranged on the inner layer of the shell in a hollow mode, each tree-shaped branched runner is composed of a distribution side runner and a collection side runner, each distribution side runner and each collection side runner are respectively composed of a multi-stage structure comprising a primary runner and a final stage runner, the primary runners of the distribution side runners are connected with a main oil inlet of the motor shell, the primary runners of the collection side runners are connected with a main oil outlet of the motor shell, and the final stage runners of the distribution side runners and the final stage runners of the collection side runners are respectively connected with oil inlets and oil outlets of cooling sleeves on the cooling sleeves.
The number of petals in the circumferential petal type meandering micro-groove capillary channel is not less than 16, the cross section of the channel is rectangular, the equivalent diameter is 1.5-3.0 mm, the channel is partially filled with liquid working medium after being vacuumized, the working medium can be selected according to the metal compatibility of the channel wall and the heat dissipation load, and the ratio of the total volume of the filled working medium to the total volume of the channel is 40-60%.
The inner wall of the capillary channel of the circumferential petal-shaped sinuous microgroove in the annular plate type gas-liquid oscillation phase-change heat dissipation component is provided with a microgroove along the channel direction, the equivalent diameter of the microgroove is between 0.15 mm and 0.45mm and not more than 15% of the equivalent diameter of the petal-shaped rectangular channel, and the cross section of the microgroove is triangular, rectangular, trapezoidal or omega-shaped.
Working media in the capillary channel of the annular plate type gas-liquid oscillation phase-change heat dissipation component can form gas and liquid plugs which are continuously distributed under the action of surface tension, so that a 'bubble pump' effect is generated. Under the effect, the working medium in the inner ring evaporation section absorbs heat and is gasified, the pressure is increased, and therefore the working medium is pushed to move to the outer ring condensation section, and the working medium is condensed and releases heat and is reduced in pressure at the section. Therefore, under the action of gas-liquid phase change pressure difference between the evaporation section and the condensation section and unbalanced pressure distribution between petal channels, gas-liquid two-phase working media form reciprocating oscillating motion between the cold end and the hot end of the annular plate type gas-liquid oscillation phase change heat dissipation component, so that sensible heat and latent heat are efficiently transported from the hot end to the cold end, and heat generated in the stator winding can be efficiently and quickly led out to the cooling jacket to be taken away. Compared with the traditional circulating phase change process based on the coupling driving of gravity and capillary force in heat transfer devices such as a flat heat pipe, a capillary heat pipe and the like, the process is formed by self excitation under the action of thermal driving forces at the cold end and the hot end, and has higher energy and mass transport capacity and heat transfer limit. Particularly, when the number of the petals is more than 16, the thermal driving force on each petal is mutually superposed to provide a large enough total driving force, so that the influence of gravity on the working performance of the petals is inhibited, and the heat transfer performance of the annular plate type gas-liquid oscillation phase change heat dissipation component is not influenced by the gravity. Moreover, the micro-groove structure on the inner wall surface of the channel can improve the capillary suction wetting effect of the inner wall of the rectangular channel on the working medium, so that the temperature uniformity and the heat transfer limit of the annular plate type gas-liquid oscillation phase change heat dissipation component are further improved.
The tree-shaped branched runner is provided with 2N + 1-level branches and comprises a 2 i-level axial branch runner and a 2i + 1-level circumferential branch runner, wherein N is a natural number greater than or equal to 0, i is an integer greater than or equal to 0 and less than or equal to N; the next stage of each stage of circumferential branch flow channel is divided into two axial branch flow channels, the next stage of the axial branch flow channel is a circumferential branch flow channel, and the upper and lower branches are mutually vertical; ratio L of the length of the 2 i-th branched flow channel to the length of the 2i + 1-th branched flow channel2i/L2i+1= l, ratio D of equivalent diameter of 2 i-th-stage branched flow channel to equivalent diameter of 2i + 1-th-stage branched flow channel2i/D2i+1Where l is a length scaling factor greater than 1 and d is an equivalent diameter scaling factor greater than 1.
The tree-branch-type flow channel is designed by imitating a tree-structure transportation system (such as branches, a river network, leaf veins and the like) widely existing in nature, and has the characteristics of uniform material distribution and collection, small running resistance and good transportation efficiency. The design can fully utilize the heat dissipation space of the motor shell, and the uniformity and the energy transmission efficiency of the distribution and collection process of the cooling oil are improved. Meanwhile, longitudinal ribs are distributed on the outer side of the motor shell, so that the effective heat dissipation area of the motor shell to the outside is further increased. By combining the two designs, the integral cooling heat dissipation performance of the motor shell is effectively enhanced.
The front end cover is fixedly provided with a positioning rod, and the positioning rod is inserted into a stator winding positioning hole arranged on the stator winding when the front end cover is installed, so that the stator winding is fixed conveniently.
The inner surface of the inner layer of the shell is provided with a plurality of raised locating pins, the outer wall of the cooling jacket is provided with a plurality of cooling jacket locating grooves matched with the locating pins, the outer surface of the annular plate type gas-liquid oscillation phase change heat dissipation component is provided with a plurality of annular plate type gas-liquid oscillation phase change heat dissipation component locating grooves matched with the locating pins, and the cooling jacket and the annular plate type gas-liquid oscillation phase change heat dissipation component are positioned and installed in the inner layer of the shell through the locating pins.
A certain number of fins are uniformly welded on the outer wall surface of the outer layer of the shell, and the fins are vertically welded on the circumferential surface of the shell along the axial direction so as to increase the effective heat dissipation area, and the thickness, the height and the distribution density of the fins are flexibly adjusted according to the heat dissipation load.
The end face of the outer layer of the shell is provided with a motor shell lug, the shell end cover is provided with a shell end cover lug, the shell end cover is fastened and connected to the end face of the outer layer of the shell through a fastening bolt, and the outer circumference of a boss of the shell end cover is uniformly provided with a shell end cover positioning groove matched with the positioning pin.
The utility model has the advantages that: the utility model provides a many stators motor cooling heat abstractor, novel structure, this heat abstractor regards as the core heat transfer component with the cyclic annular plate formula heat dissipation component based on heat-driven gas-liquid oscillation phase transition heat transfer principle, can high-efficiently derive the cooling oil in the cooling jacket with the inside heat production of stator winding fast and dispel the release, has effectively alleviated the heat and has accumulated in the stator winding, and the cooling oil does not directly contact with the moving part in the motor in this process, has effectively avoided the resistance that direct contact formula oil cooling method produced the motor operation; meanwhile, the micro-groove structure on the inner wall surface of the capillary channel of the annular plate type heat dissipation component can strengthen the capillary wetting effect of the working medium on the inner wall of the channel, so that the temperature uniformity and the heat transfer limit of the annular plate type heat dissipation component are further improved; the tree-shaped branched cooling oil channel integrated on the motor shell fully utilizes the heat dissipation space of the motor shell, and improves the uniformity and energy transport efficiency of the distribution and collection process of the cooling oil, thereby effectively strengthening the overall heat dissipation performance of the motor shell; in addition, the annular plate type heat dissipation component and the stator unit of the multi-stator motor adopt a sandwich structure design with multiple layers stacked, the structure is compact, and the installation and the maintenance are convenient. The utility model discloses can derive and effectively transport the high power heat production high efficiency of the inside many stator winding of many stator motors and release fast in the cyclic annular three-dimensional space of motor circumference, heat dissipation cooling power is big and efficient to high-efficient steady operation provides an effective means at reasonable operating temperature within range for guaranteeing many stator motors.
Drawings
Fig. 1 is a schematic view of the assembly structure of the present invention.
Fig. 2 is a schematic view of the structure of the middle and outer shells of the present invention.
Fig. 3 is a schematic structural diagram of the middle stator unit of the present invention.
Fig. 4 is a schematic view of the end cap structure of the middle housing of the present invention.
Fig. 5 is a schematic structural view of the middle annular plate type gas-liquid oscillation phase-change heat dissipation member of the present invention.
Fig. 6 is a working principle diagram of the middle annular plate type gas-liquid oscillation phase change heat dissipation member of the present invention.
Fig. 7 is a schematic view of the manufacturing process of the middle annular plate type gas-liquid oscillation phase-change heat dissipation member of the present invention.
Fig. 8 is a schematic diagram of the distribution structure of the middle tree-shaped branched runner on the inner layer of the shell of the present invention.
Fig. 9 is a schematic view of the middle tree branch type flow channel structure of the present invention.
Fig. 10 is a schematic diagram of the internal flow and heat transfer of the present invention.
In the figure: the motor comprises a motor shell 1, a shell outer layer 1a, a shell inner layer 1b, a front end cover 1c, positioning rods 2, a cooling jacket 3, a stator winding 4, an annular plate type gas-liquid oscillation phase change heat dissipation component 5, an inner ring 5a, an outer ring 5b, a shell end cover 6, a motor shell main oil inlet 7a, a motor shell main oil outlet 7b, fins 8, a tree-shaped branched runner 9, a distribution side runner 9a, a collection side runner 9b, a primary runner 9c, a final stage runner 9d, a cooling jacket oil inlet and outlet 10, a stator winding positioning hole 11, a motor shell lug 12, a shell end cover lug 13, a positioning pin 14, a cooling jacket positioning groove 15, an annular plate type gas-liquid oscillation phase change heat dissipation component positioning groove 16.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
As shown in fig. 1, the cooling and heat dissipating device for stator coil of multi-stator motor provided by the present invention is mainly formed by orderly assembling several parts, namely a motor housing 1, a cooling jacket 3, a stator winding 4, an annular plate-type gas-liquid oscillation phase change heat dissipating member 5 and a housing end cover 6.
As shown in fig. 2, the motor housing 1 is composed of three parts, a housing outer layer 1a, a housing inner layer 1b, and a front end cover 1 c. A positioning rod 2 is welded to the front end cover 1 c. A certain number of fins 8 are uniformly welded on the outer wall surface of the outer layer 1a of the shell, the fins 8 are vertically welded on the circumferential surface of the motor shell 1 along the axial direction so as to increase the effective heat dissipation area, and the thickness, height and distribution density of the fins can be flexibly adjusted according to the heat dissipation load; in addition, through holes are symmetrically formed in the two sides of the middle of the motor shell and serve as a motor shell main oil inlet 7a and a motor shell main oil outlet 7 b. The inner layer 1b of the motor shell is milled and processed with tree-shaped branched runners 9 on the outer wall, the depth of the runners is matched with the wall thickness, primary runners 9c at the top ends of a distribution side runner 9a and a collection side runner 9b are respectively aligned with a main oil inlet 7a and a main oil outlet 7b of the motor shell, and through holes are formed in positions of all final-stage runners 9d and connected with all cooling jackets 3; the inner wall is evenly provided with positioning pins 14 along the circumference. The assembly of the motor shell adopts a thermal sleeve method, after the outer layer 1a of the shell is heated and insulated, the total oil inlet/outlet 7 of the motor shell is aligned with the branch-free end of the main flow passage of the tree-shaped branch-shaped flow passage 9 and then is quickly sleeved into the inner layer 1b of the shell, the cooling rate is controlled to slowly cool the motor shell, and the motor shell is shrunk and clasped without gaps; and finally, welding the front end cover 1c to form a complete motor shell, wherein the motor shell can be made of alloy materials with better heat transfer performance, such as copper (alloy), aluminum (alloy), nickel (alloy) and the like.
As shown in fig. 3, the cooling jacket 3 is a hollow circular ring structure, and the cooling oil flows and exchanges heat in the inner space, and the inner cylindrical surface of the cooling jacket 3 is matched with the outer cylindrical surface of the stator winding 4 in size, so as to ensure close contact in structure; two through holes are formed in the outer cylindrical surface of the cooling sleeve 3 through the axis and serve as oil inlet and outlet ports 10 of the cooling sleeve; the outer cylindrical surface of the cooling jacket 3 is uniformly provided with cooling jacket positioning grooves 15 along the circumferential direction; stator winding positioning holes 11 are distributed on the stator winding and are sleeved along the positioning rods 2 during installation.
As shown in fig. 4, the end face of the shell outer layer 1a is provided with a motor shell lug 12, the shell end cover 6 is provided with a shell end cover lug 13, the shell end cover is fastened and connected to the end face of the shell outer layer 1a through a fastening bolt, and the outer circumference of the boss of the shell end cover 6 is uniformly provided with shell end cover positioning grooves 17 matched with the positioning pins 14.
As shown in fig. 1-4, the inside of the multi-stator motor stator cooling heat dissipation device is a structure in which an annular plate-type gas-liquid oscillation phase change heat dissipation member 5 is used as a partition, and a cooling jacket 3 and a stator winding 4 are nested into a layer of stator unit and are stacked and installed layer by layer along the axial direction. When the motor shell 1 is heated by adopting a hot jacket process during installation, firstly, the annular plate-type gas-liquid oscillation phase-change heat dissipation member 5 coated with heat conduction grease at two sides is inserted into the motor shell along the positioning pin 14 to enable one surface of the annular plate-type gas-liquid oscillation phase-change heat dissipation member to be attached to a front end cover, then the annular plate-type gas-liquid oscillation phase-change heat dissipation member is installed into the cooling jacket 3, an oil inlet of the cooling jacket is ensured to be aligned to a distribution side final-stage runner opening hole corresponding to the annular plate-type gas-liquid oscillation phase-change heat dissipation member, an oil outlet of the cooling jacket is aligned to a collection side final-stage runner opening hole; the annular plate type gas-liquid oscillation phase change heat dissipation component 5, the cooling jacket 3 and the stator winding 4 are repeatedly and alternately arranged, so that an axial layer-by-layer installation structure shown in the figure 1 is formed, after slow cooling, the connection part of the final-stage flow channel and the cooling jacket is tightly attached and well sealed, and finally, the motor shell 1 and a lug on the shell end cover 6 are connected through a fastening bolt.
as shown in fig. 5-7, the annular plate-type gas-liquid oscillation phase-change heat dissipation member 5 is manufactured by milling half of a circumferential petal-type meandering micro-groove capillary channel with an equivalent diameter of 1.5-3.0 mm on a metal circular plate as a substrate, then processing grooves on petal-type grooves of the substrate by adopting a laser micromachining or micro-plowing process, aligning and splicing two substrate channels by adopting a diffusion welding process, welding to form a complete internal channel shown in the figure, simultaneously reserving a joint for facilitating liquid filling, finally vacuumizing, filling a proper amount of working medium and sealing, and uniformly processing an annular plate-type gas-liquid oscillation phase-change heat dissipation member positioning groove 16 along the circumferential direction of the annular plate-type gas-liquid oscillation phase-change heat dissipation member 5 so as to be matched with a positioning pin 14 of a motor housing. The shape of the micro-groove can be trapezoidal, triangular, rectangular, omega-shaped, and the like. The working medium filling rate (the ratio of the total volume of the filled working medium to the total volume of the channel) in the annular plate type gas-liquid oscillation phase-change heat dissipation component 5 is 40-60%, and the working medium in the component can be selected according to the metal compatibility of the channel wall and the heat dissipation load, such as water, ethanol, methanol, acetone, R123 refrigerant and the like. This radiating component during operation, under the combined action of "bubble pump" effect, the unbalanced pressure distribution between the gas-liquid phase transition pressure differential and each "petal" passageway of the gas-liquid phase transition pressure differential that surface tension effect produced, the gaseous-liquid double-phase working medium is in the reciprocal oscillation phase transition heat transfer between annular plate-type gas-liquid oscillation phase transition radiating component evaporation zone and condensation segment to it transports to the cold junction efficient to promote sensible heat and latent heat from the hot junction, makes the inside heat production of stator winding can be derived to the cooling jacket and take away by the high efficiency fast. Compared with the traditional circulating phase change process based on the coupling driving of gravity and capillary force in heat transfer devices such as a flat heat pipe, a capillary heat pipe and the like, the process is formed by self excitation under the action of thermal driving forces at the cold end and the hot end, and has higher energy and mass transport capacity and heat transfer limit. Particularly, when the number of the petals is more than 16, the thermal driving force on each petal is mutually superposed to provide a large enough total driving force, so that the influence of gravity on the working performance of the petals is inhibited, and the heat transfer performance of the annular plate type gas-liquid oscillation phase change heat dissipation component is not influenced by the gravity. In addition, the micro-groove structure strengthens the wettability of the working medium to the inner wall of the channel, so that the temperature uniformity and the heat transfer limit of the annular plate type gas-liquid oscillation phase change heat dissipation component 5 are further improved.
As shown in fig. 8-9, the tree-branched cooling oil distributing and collecting flow passage of the present embodiment has six branched flow passages including a primary main flow passage, so as to distribute and collect the cooling oil; wherein the odd-numbered stages are circumferential branch flow channels and only one flow channel at each stage, the even-numbered stages are axial branch flow channels and two flow channels at each stage, and the length proportionality coefficient l of the upper stage and the lower stage is 21/2The equivalent diameter proportionality coefficient d is 21/3. The tree-shaped branch-type flow channel has the characteristics of uniform material distribution and collection, small running resistance and good transportation efficiency. Meanwhile, the design can fully utilize the heat dissipation space of the shell, and the uniformity and the energy transmission efficiency of the distribution and collection process of the cooling oil are improved.
As shown in fig. 10, the cooling and heat dissipating device for the stator of the multi-stator motor is assembled to have a layer-by-layer overlapping structure. The cooling oil flows in the device in the following process: cooling oil enters the motor shell from a motor shell main oil inlet on the distribution side, then enters a tree-shaped branched cooling oil distribution and collection flow channel 9 of the shell inner layer 1b, flows through a distribution side flow channel and reaches a final-stage branch on the distribution side; and then cooling oil enters the inner cavity of each cooling jacket 3 from an oil inlet of a distribution side cooling jacket, flows out from an oil outlet of a collection side cooling jacket, enters a final branch of a collection side flow passage, and finally converges to a motor shell total oil outlet of the collection side flow passage and flows out of the heat dissipation device. The heat transfer process is shown as a dotted arrow in the figure, an inner ring evaporation section (inner ring) 5a of the annular plate type gas-liquid oscillation phase change heat dissipation component 5 absorbs heat transferred by the electromagnetic coil, the heat is efficiently transferred to the cooling jackets 3 at two sides from an outer ring condensation section (outer ring) 5b through self-excitation gas-liquid oscillation motion of working media in the component, and meanwhile, partial heat of the stator winding is also transferred through a contact surface with the cooling jackets.
The heat dissipation device takes the annular plate type heat dissipation component as a core heat transfer element, and can efficiently and quickly conduct heat generated in the stator winding out to cooling oil in the cooling jacket for quick heat dissipation; meanwhile, the micro-groove structure on the inner wall surface of the capillary channel of the annular plate type heat dissipation member can strengthen the capillary wetting effect of the working medium on the inner wall of the channel, and further improve the temperature uniformity and heat transfer limit of the annular plate type heat dissipation member; the tree-shaped branched cooling oil channel integrated on the motor shell fully utilizes the heat dissipation space of the motor shell, and improves the uniformity and energy transport efficiency of the distribution and collection process of the cooling oil, thereby effectively strengthening the overall heat dissipation performance of the motor shell; in addition, annular plate-type heat dissipation component with the sandwich structure design that the stator unit of many stator motors adopted the multilayer to pile up, compact structure, installation maintenance convenience. The utility model discloses can derive and effectively transport the high power heat production high efficiency of the inside many stator winding of many stator motors and release fast in the cyclic annular three-dimensional space of motor circumference, heat dissipation cooling power is big and efficient to high-efficient steady operation provides an effective means at reasonable operating temperature within range for guaranteeing many stator motors.
Claims (8)
1. A multi-stator motor cooling and heat dissipating device comprises a motor shell (1) consisting of a shell outer layer (1a), a shell inner layer (1b) and a front end cover (1c), and a shell end cover (6) arranged on the side, with lugs, of the motor shell (1); the method is characterized in that: a motor shell main oil inlet (7a) and a motor shell main oil outlet (7b) are formed in the shell outer layer (1 a); a stator unit is arranged in the shell inner layer (1b), the stator unit consists of a stator winding (4) and a cooling jacket (3), the stator winding (4) is coaxially embedded in the cooling jacket (3), and a layer of annular plate-type gas-liquid oscillation phase change heat dissipation component (5) is tightly clamped between each two stator units; the annular plate type gas-liquid oscillation phase change heat dissipation component (5) is internally provided with a circumferential petal type winding micro-groove capillary channel connected end to end, the annular plate type gas-liquid oscillation phase change heat dissipation component (5) is divided into an inner ring (5a) and an outer ring (5b), the inner ring (5a) is in close contact with the stator winding (4) to form an annular plate type gas-liquid oscillation phase change heat dissipation component evaporation section, and the outer ring (5b) is in close contact with the cooling jacket (3) to form an annular plate type gas-liquid oscillation phase change heat dissipation component condensation section; the stator units and the annular plate type gas-liquid oscillation phase change heat dissipation members (5) are installed layer by layer along the axial direction of the motor shell (1) to form a multi-layer stacked sandwich structure; the inner layer (1b) of the shell is provided with tree-branch-shaped flow passages (9) for distributing and collecting cooling oil in a hollow way, the tree-shaped branched runner (9) consists of a distribution side runner (9a) and a collection side runner (9b), the distribution-side flow passage (9a) and the collection-side flow passage (9b) are each constituted by a multistage structure including a primary flow passage (9c) and a final flow passage (9d), a primary flow passage (9c) of the distribution side flow passage (9a) is connected with a motor shell general oil inlet (7a), a primary flow channel (9c) of the collecting side flow channel (9b) is connected with a motor shell total oil outlet (7b), and a final stage flow channel (9d) of the distribution side flow channel (9a) and a final stage flow channel (9d) of the collection side flow channel (9b) are respectively connected with a cooling sleeve oil inlet and outlet (10) on each cooling sleeve (3).
2. The cooling and heat dissipating device for a multi-stator motor according to claim 1, wherein: the number of petals in the circumferential petal type meandering micro-groove capillary channel is not less than 16, the cross section of the channel is rectangular, the equivalent diameter is 1.5-3.0 mm, the vacuumizing part of the channel is filled with liquid working medium, and the ratio of the total volume of the filled working medium to the total volume of the channel is 40% -60%.
3. The cooling and heat dissipating device for a multi-stator motor according to claim 1, wherein: the tree-shaped branched runner (9) is provided with 2N + 1-level branches and comprises a 2 i-level axial branch runner and a 2i + 1-level circumferential branch runner, wherein N is a natural number greater than or equal to 0, i is an integer greater than or equal to 0 and less than or equal to N; the next stage of each stage of circumferential branch flow channel is divided into two axial branch flow channels, the next stage of the axial branch flow channel is a circumferential branch flow channel, and the upper and lower branches are mutually vertical; ratio L of the length of the 2 i-th branched flow channel to the length of the 2i + 1-th branched flow channel2i/L2i+1= l, ratio D of equivalent diameter of 2 i-th-stage branched flow channel to equivalent diameter of 2i + 1-th-stage branched flow channel2i/D2i+1Where l is a length scaling factor greater than 1 and d is an equivalent diameter scaling factor greater than 1.
4. The cooling and heat dissipating device for a multi-stator motor according to claim 1, wherein: the stator winding positioning structure is characterized in that a positioning rod (2) is fixedly arranged on the front end cover (1c), and the positioning rod (2) is inserted into a stator winding positioning hole (11) formed in the stator winding (4) when the front end cover (1c) is installed, so that the stator winding (4) is fixed.
5. The cooling and heat dissipating device for a multi-stator motor according to claim 1, wherein: the inner surface of the shell inner layer (1b) is provided with a plurality of raised positioning pins (14), the outer wall of the cooling jacket (3) is provided with a plurality of cooling jacket positioning grooves (15) matched with the positioning pins (14), the outer surface of the annular plate type gas-liquid oscillation phase change heat dissipation component (5) is provided with a plurality of annular plate type gas-liquid oscillation phase change heat dissipation component positioning grooves (16) matched with the positioning pins (14), and the cooling jacket (3) and the annular plate type gas-liquid oscillation phase change heat dissipation component (5) are positioned and installed in the shell inner layer (1b) through the positioning pins (14).
6. The cooling and heat dissipating device for a multi-stator motor according to claim 1, wherein: the inner wall of the capillary channel of the circumferential petal-shaped sinuous microgroove in the annular plate type gas-liquid oscillation phase-change heat dissipation component (5) is provided with a microgroove along the channel direction, the equivalent diameter of the microgroove is between 0.15 mm and 0.45mm and not more than 15% of the equivalent diameter of the petal-shaped rectangular channel, and the cross section of the microgroove is triangular, rectangular, trapezoidal or omega-shaped.
7. The cooling and heat dissipating device for a multi-stator motor according to claim 1, wherein: the outer wall surface of the shell outer layer (1a) is uniformly welded with a certain number of fins (8), and the fins (8) are vertically welded on the circumferential surface of the motor shell (1) along the axial direction so as to increase the effective heat dissipation area, and the thickness, height and distribution density of the fins are flexibly adjusted according to the heat dissipation load.
8. The cooling and heat dissipating device for a multi-stator motor according to claim 1, wherein: the end face of the outer layer (1a) of the shell is provided with a motor shell lug (12), the shell end cover (6) is provided with a shell end cover lug (13), the shell end cover is fastened and connected to the end face of the outer layer (1a) of the shell through a fastening bolt, and the outer circumference of a boss of the shell end cover (6) is uniformly provided with a shell end cover positioning groove (17) matched with the positioning pin (14).
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| CN201920951766.6U CN209805607U (en) | 2019-06-21 | 2019-06-21 | Cooling and heat-dissipating device for multi-stator motor |
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| CN201920951766.6U CN209805607U (en) | 2019-06-21 | 2019-06-21 | Cooling and heat-dissipating device for multi-stator motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233545A (en) * | 2019-06-21 | 2019-09-13 | 扬州大学 | A kind of multiple stators motor cooling heat radiator |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233545A (en) * | 2019-06-21 | 2019-09-13 | 扬州大学 | A kind of multiple stators motor cooling heat radiator |
| CN110233545B (en) * | 2019-06-21 | 2024-02-02 | 扬州大学 | Cooling and radiating device for multi-stator motor |
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