CN210246545U - New energy automobile super high efficiency motor cooling system loop structure - Google Patents
New energy automobile super high efficiency motor cooling system loop structure Download PDFInfo
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- CN210246545U CN210246545U CN201921318473.0U CN201921318473U CN210246545U CN 210246545 U CN210246545 U CN 210246545U CN 201921318473 U CN201921318473 U CN 201921318473U CN 210246545 U CN210246545 U CN 210246545U
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Abstract
The utility model discloses a new energy automobile super high efficiency motor cooling system loop construction, including motor, hot water manifold and cooling water manifold, the hot water manifold passes through second cooling circuit output tube and first cooling circuit output tube connection motor, and the cooling water manifold passes through second cooling circuit input tube and first cooling circuit input tube connection motor, and hot water manifold and cooling water manifold connect refrigerating unit. The utility model discloses can provide the cooling water in succession for the motor, reduce the inside temperature of motor during operation, prolong the life of motor, can make the rotor realize cooling through the air-cooling, the secondary cooling to the motor is handled in the realization of rethread first cooling circuit input tube, first cooling circuit output tube, second cooling circuit input tube and second cooling circuit output tube, has improved the work efficiency of motor.
Description
Technical Field
The utility model relates to a new energy automobile super high efficiency motor cooling system loop structure.
Background
The new energy automobile is an automobile which adopts unconventional automobile fuel as a power source, integrates advanced technologies in the aspects of power control and driving of the automobile, and is advanced in technical principle, new in technology and new in structure.
The motor is a driving part of the new energy automobile, and the normal running of the automobile is directly influenced by the performance of the motor, so that the requirement on the performance of the motor is higher. The existing motor has defects in the aspect of cooling due to the structural design, so that the heating problem of the motor is serious, and the service life of the motor is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide the technical scheme of new energy automobile super high efficiency motor cooling system loop construction to the not enough of prior art existence, can provide the cooling water for the motor in succession, reduce the inside temperature of motor during operation, the life of extension motor, the cooling water manifold can shunt the cooling water, can realize the cooling of once cooling to the motor through first cooling circuit input tube and first cooling circuit output tube, can realize the secondary cooling to the motor through second cooling circuit input tube and second cooling circuit output tube, and in water input refrigerating unit after with the heat transfer through the hot water manifold, realize cyclic utilization, the loss of energy is reduced. The mounting method has simple steps, can cool the rotor by air cooling, and then realizes secondary cooling treatment of the motor by cooling water through the first cooling loop input pipe, the first cooling loop output pipe, the second cooling loop input pipe and the second cooling loop output pipe by the refrigerating unit, thereby improving the working efficiency of the motor and prolonging the service life of the motor.
In order to solve the technical problem, the utility model discloses a following technical scheme:
new energy automobile super high efficiency motor cooling system loop structure, its characterized in that: the system comprises a motor, a hot water manifold and a cooling water manifold, wherein the hot water manifold is connected with the motor through a second cooling loop output pipe and a first cooling loop output pipe; the refrigerating unit passes through first cooling circuit input tube, first cooling circuit output tube, second cooling circuit input tube and second cooling circuit output tube can provide the cooling water for the motor in succession, reduce the inside temperature of motor during operation, the life of extension motor, the cooling water manifold can shunt the cooling water, can realize the cooling of once cooling to the motor through first cooling circuit input tube and first cooling circuit output tube, can realize the cooling of the secondary of motor through second cooling circuit input tube and second cooling circuit output tube, and through the hot water manifold with the water input refrigerating unit after the heat transfer in, realize cyclic utilization, the loss of reduction energy.
Further, the motor includes the shell, the rear end housing, the front end housing, stator and rotor, front end housing and rear end housing are fixed connection respectively at the both ends of shell, stator fixed connection is in the inside of shell, the rotor rotates the center department of connecting at the stator, the shell, be provided with first cooling circuit subassembly between front end housing and the rear end housing, be provided with second cooling circuit subassembly on the stator, can communicate with first cooling circuit input tube and first cooling circuit output tube through first cooling circuit subassembly, realize the cooling of motor housing, can communicate with second cooling circuit input tube and second cooling circuit output tube through second cooling circuit subassembly, the realization is to the cooling of stator and the inside of motor, the work efficiency of improvement motor.
Furthermore, the rear end cover is provided with a mounting hole, and the mounting hole is used for communicating the second cooling circuit input pipe, the second cooling circuit output pipe and the cooling circuit coil pipe to realize the sealing connection of the second cooling circuit assembly.
Furthermore, the first cooling loop component comprises cooling straight pipes and cooling connecting grooves, the cooling straight pipes are uniformly arranged on the shell and are annularly arranged, positioning rings are respectively arranged on the front end cover and the rear end cover, the cooling connecting grooves are uniformly arranged on the positioning rings, the cooling connecting grooves on the front end cover and the cooling connecting grooves on the rear end cover are arranged in a staggered manner, two adjacent cooling straight pipes are communicated through the cooling connecting grooves, the output pipe of the first cooling loop and the input pipe of the first cooling loop are respectively communicated with the cooling straight pipes, the cooling of the shell of the motor can be realized through the design of the cooling straight pipes and the cooling connecting grooves, the whole space of the motor is not occupied, the cooling effect of a cooling system is greatly improved, the whole weight of the motor is reduced, the positioning rings are designed to prevent the cooling straight pipes from directly contacting with the rear end cover and the front end cover, and further the depth of the cooling connecting grooves is reduced, the flowing speed of cooling water in the cooling connecting groove is influenced, and the resistance is reduced.
Furthermore, the second cooling circuit assembly comprises a cooling circuit coil which is fixedly connected to the stator, two ends of the cooling circuit coil are respectively connected with the second cooling circuit output pipe and the second cooling circuit input pipe, and a secondary cooling circuit structure is formed by the second cooling circuit output pipe, the second cooling circuit input pipe and the cooling circuit coil, so that the cooling treatment of the interior of the motor is realized, and the working efficiency of the motor is improved.
Further, the stator includes the stator monomer, stator monomer end to end connection forms ring structure, be provided with the wire winding groove on the free medial surface of stator, be provided with stator winding in the wire winding groove, the free both sides of stator symmetry respectively are provided with fixture block and draw-in groove, fixture block and draw-in groove phase-match, the fixture block runs through the draw-in groove through fastening screw, realize the fixed connection between two adjacent stator monomers, design through fixture block and draw-in groove, can close the end with two adjacent stator monomers and connect fixedly, it is fixed to be convenient for carry out the clamping to the cooling circuit coil pipe, the processing installation of being convenient for simultaneously, easy maintenance is swift.
Further, be provided with spacing on the free lateral surface of stator, evenly be provided with the spacing groove on the medial surface of shell, spacing and spacing groove phase-match have improved the installation accuracy of stator through the design of spacing and spacing groove, prevent that the rotor from colliding with the cooling circuit coil pipe when rotatory.
Furthermore, a positioning hole is formed between every two adjacent stator units, the cooling circuit coil is matched with the positioning hole, and the positioning hole improves the stability and the reliability of the installation of the cooling circuit coil.
Furthermore, a clamping groove is formed between the outer side faces of the two adjacent stator units, the clamping groove is convenient for mounting and dismounting the stator units, and meanwhile, an air duct can be formed to realize air cooling.
The installation method of the loop structure of the ultra-efficient motor cooling system of the new energy automobile is characterized by comprising the following steps of:
1) electric machine machining
a. The size of the shell is determined according to the design requirement, the required shell is formed by casting molding, the cooling straight pipes, the limiting grooves and the shell are integrally molded during casting, the cooling straight pipes are guaranteed to be equal in size and are annularly distributed on the circumference of the shell, the limiting grooves are uniformly distributed on the inner side surface of the shell, and the limiting grooves and the cooling straight pipes are polished;
b. then determining the size of the front end cover and the rear end cover according to the size of the shell, forming the required front end cover and rear end cover by casting molding, integrally molding the positioning ring with the front end cover and the rear end cover when the front end cover and the rear end cover are cast, ensuring that the sizes of all cooling connecting grooves on the positioning ring are equal, polishing the processed cooling connecting grooves, simultaneously arranging shaft holes on the front end cover, reserving enough space for the cooling connecting grooves by the design of the positioning ring, reducing the resistance of cooling water during flowing, enabling the cooling connecting grooves and cooling straight pipes to form complete channels, improving the smoothness of the cooling connecting grooves by polishing, and reducing the resistance of the cooling water;
c. then, manufacturing a corresponding rotor according to design requirements, enabling a rotating shaft on the rotor to be matched with the shaft hole, installing blades on the rotating shaft, horizontally and uniformly arranging ventilation holes along the axial direction of the rotor, enabling the ventilation holes to be uniformly arranged on the circumference of the rotor in an annular shape, generating wind power through the blades, enabling the ventilation holes to realize the wind cooling effect on the rotor, reducing the temperature of the rotor and prolonging the service life of the rotor;
2) stator machining
a. The method comprises the steps that firstly, the size of a stator is determined according to the sizes of a shell and a rotor, corresponding stator monomers are manufactured, each stator monomer is of a fan-shaped structure, when the stator monomers are processed, a winding slot on the inner side face of each stator monomer is integrally formed with the corresponding stator monomer, the outer side face of each processed stator monomer is polished, the stator monomers of the fan-shaped structures are convenient to be attached and installed along the inside of the shell, the stability and the reliability of stator installation are improved, and meanwhile, stator windings are convenient to install;
b. then horizontally installing a limiting strip matched with the limiting groove along the outer circumferential side surface of the stator single body, improving the assembly precision of the stator single body during installation through the limiting strip, and preventing the cooling circuit coil from colliding with the front end cover or the rear end cover during installation so as to further influence the installation stability of the cooling circuit coil;
c. the clamping blocks and the clamping grooves are symmetrically arranged on the two connecting end surfaces of the stator monomers respectively, the clamping blocks are matched with the clamping grooves, positioning holes are formed in the two connecting end surfaces above the clamping blocks and the clamping grooves, the positioning holes are semicircular, a complete circular positioning hole is formed after the two stator monomers are connected, clamping grooves are formed in the outer circumferential side surfaces of the stator monomers, the assembling precision between the two adjacent stator monomers can be improved through the clamping blocks and the clamping grooves, the two adjacent stator monomers can be fixedly connected through fastening screws, the positioning holes are convenient for clamping and positioning the cooling circuit coil, the cooling circuit coil is prevented from moving to influence the normal work of the motor, the clamping grooves are convenient for mounting and dismounting the stator monomers, and meanwhile, the ventilation effect can be achieved;
d. finally, a stator winding is arranged on the winding slot;
3) secondary cooling assembly machining
a. Firstly, the size of a cooling loop coil pipe is determined according to the size of a positioning hole and the size of a stator, a straight pipe is formed by drawing, the wall thickness and the aperture of the straight pipe are ensured to be uniform and equal, the stability of cooling water flowing in the cooling loop coil pipe is improved, and the increase of the flowing resistance of the cooling water due to the deformation of the cooling loop coil pipe is prevented;
b. then, the straight pipe is bent at equal intervals through a bending machine according to the interval between two adjacent positioning holes to form a required cooling loop coil, the heat exchange efficiency can be maximized through the zigzag cooling loop coil, the cooling of the interior of the motor is improved, and the service life of the motor is prolonged;
4) loop component machining
a. Firstly, manufacturing a corresponding hot water manifold and a corresponding cooling water manifold according to design requirements, wherein two first connecting holes are formed in one side of each of the hot water manifold and the cooling water manifold, a second connecting hole is formed in the other side of each of the hot water manifold and the cooling water manifold, the first connecting holes are used for connecting a first cooling loop input pipe, a first cooling loop output pipe, a second cooling loop input pipe and a second cooling loop output pipe, and the second connecting holes are used for connecting a refrigerating unit;
b. then a first cooling loop input pipe, a first cooling loop output pipe, a second cooling loop input pipe and a second cooling loop output pipe with corresponding lengths are manufactured according to the layout path of the pipeline, and the pipe diameters and the wall thicknesses of the input pipe of the first cooling loop, the output pipe of the first cooling loop, the input pipe of the second cooling loop and the output pipe of the second cooling loop are detected to ensure that all pipelines are detected to be qualified, cooling water can be continuously input into the cooling straight pipe in the shell through the input pipe of the first cooling loop and then flows back to the refrigerating unit through the output pipe of the first cooling loop to realize primary cooling treatment, cooling water can be continuously input into the cooling loop coil pipe through the second cooling loop input pipe and then flows back to the refrigerating unit through the second cooling loop output pipe, so that secondary cooling treatment is realized, the cooling effect of the motor is greatly improved, and the working efficiency of the motor is improved;
5) loop structure assembly
a. Firstly, two machined stator monomers are sleeved on two sides of a cooling circuit coil pipe, so that the cooling circuit coil pipe is inserted into a positioning hole between the two stator monomers, then a clamping block on one side of the stator monomer is inserted into a clamping groove of the other side of the stator monomer, and the stator monomers are fixedly connected through a fastening screw until the required stator monomers are connected end to end and installed, the cooling circuit coil pipe is fixed through the stator monomers, the installation and the disassembly of the cooling circuit coil pipe are convenient, and the assembly precision is improved;
b. then the stator is inserted into the shell, so that a limiting strip on the outer side of the stator is limited in a limiting groove on the inner side surface of the shell, and the stator and the shell are fixed through screws, thereby improving the stability and reliability of stator installation and preventing the stator from moving when the motor works to influence the normal work of the motor;
c. then fixedly installing the rear end cover at one side of the shell, communicating the cooling connecting groove on the rear end cover with two adjacent cooling straight pipes, sealing, and simultaneously penetrating two interfaces of the cooling loop coil pipe through the installation hole on the rear end cover to realize communication of one side of the cooling straight pipe and positioning the cooling loop coil pipe;
d. inserting the processed rotor into the stator, connecting one end of the rotor to the center of the rear end cover, limiting the other end of the rotor on the shaft hole of the front end cover, enabling the front end cover to be close to the shell, communicating the cooling connection groove on the front end cover with two adjacent cooling straight pipes in the shell, ensuring that the cooling connection groove on the front end cover and the cooling connection groove on the rear end cover are arranged in a staggered mode, sealing and fixing the front end cover and the shell, communicating the two adjacent cooling straight pipes and positioning the rotor;
e. finally, the processed hot water manifold and the processed cooling water manifold are respectively communicated with the cooling straight pipe in the shell through a first cooling loop output pipe and a first cooling loop input pipe, then the hot water manifold and the cooling water manifold are respectively communicated with two interfaces of a cooling loop coil pipe through a second cooling loop output pipe and a second cooling loop input pipe, and then the other sides of the hot water manifold and the cooling water manifold are communicated with a refrigerating unit;
6) test run of motor
The motor is started for 30min, then the refrigerating unit continuously inputs cooling liquid into a cooling straight pipe in the shell through a cooling water manifold via a first cooling loop input pipe, the cooling liquid is input into a hot water manifold via a first cooling loop output pipe after heat exchange of the cooling straight pipe and then flows to the refrigerating unit to realize primary water cooling, then the refrigerating unit continuously inputs the cooling liquid into a cooling loop coil pipe on the inner side of the shell through the cooling water manifold via a second cooling loop input pipe, the cooling liquid is input into the hot water manifold via a second cooling loop output pipe after heat exchange of the cooling loop coil pipe and then flows to the refrigerating unit to realize secondary water cooling.
The mounting method has simple steps, can cool the rotor by air cooling, and then realizes secondary cooling treatment of the motor by cooling water through the first cooling loop input pipe, the first cooling loop output pipe, the second cooling loop input pipe and the second cooling loop output pipe by the refrigerating unit, thereby improving the working efficiency of the motor and prolonging the service life of the motor.
The motor cooling is implemented by a double-water internal cooling technology and an automatic control compressor cooling mode. The double-water internal cooling is adopted for cooling when the motor operates, and when the electric automobile stops and the motor is at low speed and stops operating, the automatic control system is adopted to control the compressed air to implement air cooling, so that the power density of the automobile motor is improved by implementing the technology and reaches more than 2.5 kW/kg. The size is reduced, the weight is reduced, and the reliability of the motor is improved through a cooling technology.
The technology is applied to the high-efficiency energy-saving motor, and the effect is very obvious. After the technology is used, under the condition of the same power, the number of a machine seat is reduced (material is saved), and the power density of the motor reaches the international leading level (high efficiency). The motor power density is increased from 1.8kW/kg to a level of 2.5 kW/kg. The temperature rise is reduced by 5 ℃, and the reliability of the motor is improved.
The motor cooling is implemented by a double-water internal cooling technology and an automatic control compressor cooling mode. The double-water internal cooling is adopted for cooling when the motor operates, and when the electric automobile stops and the motor is at low speed and stops operating, the automatic control system is adopted to control the compressed air to implement air cooling, so that the power density of the automobile motor is improved by implementing the technology and reaches more than 2.5 kW/kg. The size is reduced, the weight is reduced, and the reliability of the motor is improved through a cooling technology.
The utility model discloses owing to adopted above-mentioned technical scheme, following beneficial effect has:
1. the refrigerating unit can continuously provide cooling water for the motor through the first cooling loop input pipe, the first cooling loop output pipe, the second cooling loop input pipe and the second cooling loop output pipe, the temperature inside the motor during working is reduced, and the service life of the motor is prolonged.
2. The cooling water manifold can shunt cooling water, can realize the cooling of once cooling to the motor through first cooling circuit input tube and first cooling circuit output tube, can realize the cooling of the secondary of motor through second cooling circuit input tube and second cooling circuit output tube to in water input refrigerating unit after will exchanging the heat through the hot water manifold, realize cyclic utilization, the loss of reduction energy.
3. The cooling of motor housing can be realized through the design of cooling straight tube and cooling linking groove, not only does not occupy the whole space of motor, has improved cooling system's cooling effect moreover greatly, has reduced the holistic weight of motor, and the direct contact with rear end housing and front end housing of cooling straight tube is avoided in the design of holding ring, and then has reduced the degree of depth that the cooling links up the groove, influences the flow speed of cooling water in the cooling linking groove, reduces the resistance.
4. A secondary cooling loop structure is formed by the second cooling loop output pipe, the second cooling loop input pipe and the cooling loop coil pipe, so that the cooling treatment of the interior of the motor is realized, and the working efficiency of the motor is improved.
5. Through the design of fixture block and draw-in groove, can carry out the end connection with two adjacent stator monomers and fix, be convenient for carry out the clamping to the cooling circuit coil pipe fixed, the processing installation of being convenient for simultaneously, easy maintenance is swift.
6. The mounting method has simple steps, can cool the rotor by air cooling, and then realizes secondary cooling treatment of the motor by cooling water through the first cooling loop input pipe, the first cooling loop output pipe, the second cooling loop input pipe and the second cooling loop output pipe by the refrigerating unit, thereby improving the working efficiency of the motor and prolonging the service life of the motor.
Description of the drawings:
the present invention will be further explained with reference to the accompanying drawings:
fig. 1 is an effect diagram of the loop structure of the cooling system of the ultra-efficient motor of the new energy automobile;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a schematic view of the connection between the coil and the stator of the cooling circuit of the present invention;
fig. 4 is a schematic view of the connection between two stator units in the present invention;
fig. 5 is a schematic view of the connection between the stator and the housing according to the present invention;
FIG. 6 is an enlarged view of a portion of FIG. 5 at I;
fig. 7 is a schematic structural view of the middle front end cover of the present invention.
In the figure: 1-a motor; 2-a hot water manifold; 3-cooling water manifold; 4-a second cooling circuit output pipe; 5-a second cooling circuit input pipe; 6-first cooling circuit input pipe; 7-a first cooling circuit output pipe; 8-a housing; 9-rear end cap; 10-front end cap; 11-a stator; 12-a rotor; 13-cooling circuit coil; 14-mounting holes; 15-stator monomer; 16-a limit bar; 17-a winding slot; 18-a card slot; 19-a fixture block; 21-a fastening screw; 22-cooling the straight pipe; 23-positioning holes; 24-clamping groove; 25-a positioning ring; cooling the splicing tank 26.
Detailed Description
As shown in fig. 1 to 7, for the new energy automobile super-efficient motor cooling system loop structure of the present invention, including the motor 1, the hot water manifold 2 and the cooling water manifold 3, the hot water manifold 2 is connected to the motor 1 through the second cooling circuit output pipe 4 and the first cooling circuit output pipe 7, the cooling water manifold 3 is connected to the motor 1 through the second cooling circuit input pipe 5 and the first cooling circuit input pipe 6, and the hot water manifold 2 and the cooling water manifold 3 are connected to the refrigerating unit; the refrigerating unit passes through first cooling circuit input tube 6, first cooling circuit output tube 7, second cooling circuit input tube 5 and second cooling circuit output tube 4 can provide the cooling water for motor 1 in succession, reduce the inside temperature of motor 1 during operation, the life of extension motor 1, cooling water manifold 3 can shunt the cooling water, can realize the cooling of once cooling to motor 1 through first cooling circuit input tube 6 and first cooling circuit output tube 7, can realize the cooling of the secondary cooling to motor 1 through second cooling circuit input tube 5 and second cooling circuit output tube 4, and in importing the refrigerating unit through hot water manifold 2 with the water after the heat transfer, realize cyclic utilization, the loss of reduction energy.
The rear end cover 9 is provided with a mounting hole 14, and the mounting hole 14 is used for communicating the second cooling circuit input pipe 5 and the second cooling circuit output pipe 4 with the cooling circuit coil 13 to realize the sealing connection of the second cooling circuit assembly.
The first cooling loop component comprises cooling straight pipes 22 and cooling linking grooves 26, the cooling straight pipes 22 are uniformly arranged on the shell 8 and are annularly arranged, positioning rings 25 are respectively arranged on the front end cover 10 and the rear end cover 9, the cooling linking grooves 26 are uniformly arranged on the positioning rings 25, the cooling linking grooves 26 on the front end cover 10 and the cooling linking grooves 26 on the rear end cover 9 are mutually staggered, two adjacent cooling straight pipes 22 are communicated through the cooling linking grooves 26, the first cooling loop output pipe 7 and the first cooling loop input pipe 6 are respectively communicated with the cooling straight pipes 22, the cooling of the shell 8 of the motor 1 can be realized through the design of the cooling straight pipes 22 and the cooling linking grooves 26, the whole space of the motor 1 is not occupied, the cooling effect of a cooling system is greatly improved, the whole weight of the motor 1 is reduced, the design of the positioning rings 25 avoids the direct contact of the cooling straight pipes 22 with the rear end cover 9 and the front end cover 10, further, the depth of the cooling joint groove 26 is reduced, the flow speed of cooling water in the cooling joint groove 26 is influenced, and the resistance is reduced.
The second cooling circuit assembly comprises a cooling circuit coil 13, the cooling circuit coil 13 is fixedly connected to the stator 11, two ends of the cooling circuit coil 13 are respectively connected with a second cooling circuit output pipe 4 and a second cooling circuit input pipe 5, and a secondary cooling circuit structure is formed by the second cooling circuit output pipe 4, the second cooling circuit input pipe 5 and the cooling circuit coil 13, so that the internal cooling treatment of the motor 1 is realized, and the working efficiency of the motor 1 is improved.
The installation method of the loop structure of the ultra-efficient motor cooling system of the new energy automobile comprises the following steps:
1) electric machine 1 machining
a. The outer shell 8 is first dimensioned according to design requirements, the desired outer shell 8 is formed by casting, when pouring, the cooling straight pipes 22, the limiting grooves and the shell 8 are integrally formed, the size of each cooling straight pipe 22 is ensured to be equal when pouring, and are annularly distributed on the circumference of the shell 8, the limiting grooves are uniformly distributed on the inner side surface of the shell 8, the limiting grooves and the cooling straight pipes 22 are polished, the integrated design greatly simplifies the processing steps of the shell 8, improves the processing efficiency, meanwhile, the sizes of the cooling straight pipes 22 and the limiting grooves are equal, the assembling error is reduced, the temperature of the whole shell 8 can be uniformly changed due to the annular distribution of the cooling straight pipes 22, the influence on the strength of the shell 8 caused by local overheating or hot and cold is avoided, and the resistance of cooling water flowing in the cooling straight pipes 22 can be reduced due to polishing treatment;
b. then the size of the front end cover 10 and the size of the rear end cover 9 are determined according to the size of the shell 8, the required front end cover 10 and the required rear end cover 9 are formed by casting molding, when the front end cover 10 and the rear end cover 9 are cast, the positioning ring 25 is integrally molded with the front end cover 10 and the rear end cover 9, the sizes of all cooling connecting grooves 26 on the positioning ring 25 are ensured to be equal, the machined cooling connecting grooves 26 are polished, meanwhile, shaft holes are formed in the front end cover 10, through the design of the positioning ring 25, enough space can be reserved in the cooling connecting grooves 26, the resistance of cooling water during flowing is reduced, the cooling connecting grooves 26 and the cooling straight pipes 22 form complete channels, the smoothness of the cooling connecting grooves 26 can be improved through polishing, and the resistance of the cooling water is reduced;
c. then, manufacturing a corresponding rotor 12 according to design requirements, enabling a rotating shaft on the rotor 12 to be matched with a shaft hole, installing blades on the rotating shaft, and horizontally and uniformly arranging ventilation holes along the axial direction of the rotor 12 to enable the ventilation holes to be uniformly arranged on the circumference of the rotor 12 in an annular shape, wherein wind power can be generated through the blades, the ventilation holes can realize the air cooling effect on the rotor 12, the temperature of the rotor 12 is reduced, and the service life of the rotor 12 is prolonged;
2) stator 11 machining
a. Firstly, the size of a stator 11 is determined according to the sizes of a shell 8 and a rotor 12, corresponding stator monomers 15 are manufactured, each stator monomer 15 is of a fan-shaped structure, when the stator monomers 15 are machined, a winding slot 17 on the inner side face of each stator monomer 15 and the corresponding stator monomer 15 are integrally formed, the outer side face of each machined stator monomer 15 is polished, the stator monomers 15 of the fan-shaped structures are convenient to be attached and installed along the inside of the shell 8, the installation stability and reliability of the stator 11 are improved, and meanwhile, the installation of windings of the stator 11 is facilitated;
b. then, a limiting strip 16 matched with the limiting groove is horizontally arranged along the side surface of the outer circumference of the stator single body 15, the assembling precision of the stator single body 15 during installation is improved through the limiting strip 16, and the cooling circuit coil 13 is prevented from colliding with the front end cover 10 or the rear end cover 9 during installation, so that the installation stability of the cooling circuit coil 13 is further influenced;
c. then, the fixture blocks 19 and the clamping grooves 18 are respectively and symmetrically installed on the two connecting end surfaces of the stator single bodies 15, the fixture blocks 19 are matched with the clamping grooves 18, meanwhile, the positioning holes 23 are respectively formed in the two connecting end surfaces above the fixture blocks 19 and the clamping grooves 18, the positioning holes 23 are semicircular positioning holes 23, a complete circular positioning hole 23 is formed after the two stator single bodies 15 are connected, meanwhile, the clamping grooves 24 are formed in the outer circumferential side surfaces of the stator single bodies 15, the assembling precision between the two adjacent stator single bodies 15 can be improved through the fixture blocks 19 and the clamping grooves 18, the fixed connection between the two adjacent stator single bodies 15 can be realized through the fastening screws 21, the positioning holes 23 are convenient for clamping and positioning the cooling circuit coil 13, the normal work of the motor 1 is prevented from being influenced due to the movement of the cooling circuit coil 13, and the clamping grooves 24 are convenient for the installation, meanwhile, the ventilation effect can be realized;
d. finally, a stator 11 winding is arranged on the winding slot 17;
3) secondary cooling assembly machining
a. Firstly, the size of the cooling loop coil 13 is determined according to the size of the positioning hole 23 and the size of the stator 11, a straight pipe is formed by drawing, the wall thickness and the aperture of the straight pipe are ensured to be uniform and equal, the stability of the cooling water flowing in the cooling loop coil 13 is improved, and the increase of the flowing resistance of the cooling water due to the deformation of the cooling loop coil 13 is prevented;
b. then, bending the straight pipe at equal intervals through a bending machine according to the interval between two adjacent positioning holes 23 to form a required cooling loop coil 13, wherein the zigzag cooling loop coil 13 can maximize the heat exchange efficiency, improve the cooling of the interior of the motor 1 and prolong the service life of the motor 1;
4) loop component machining
a. Firstly, manufacturing a corresponding hot water manifold 2 and a corresponding cooling water manifold 3 according to design requirements, wherein two first connecting holes are formed in one side of each of the hot water manifold 2 and the cooling water manifold 3, a second connecting hole is formed in the other side of each of the hot water manifold 2 and the cooling water manifold 3, the first connecting holes are used for connecting a first cooling loop input pipe 6, a first cooling loop output pipe 7, a second cooling loop input pipe 5 and a second cooling loop output pipe 4, and the second connecting holes are used for connecting a refrigerating unit;
b. then a first cooling loop input pipe 6, a first cooling loop output pipe 7, a second cooling loop input pipe 5 and a second cooling loop output pipe 4 with corresponding lengths are manufactured according to the layout path of the pipelines, the pipe diameters and the wall thicknesses of the first cooling loop input pipe 6, the first cooling loop output pipe 7, the second cooling loop input pipe 5 and the second cooling loop output pipe 4 are detected to ensure that all the pipelines are detected to be qualified, cooling water can be continuously input into a cooling straight pipe 22 in a shell 8 through the first cooling loop input pipe 6 and then flows back to a refrigerating unit through the first cooling loop output pipe 7 to realize primary cooling treatment, cooling water can be continuously input into a cooling loop coil 13 through the second cooling loop input pipe 5 and then flows back to the refrigerating unit through the second cooling loop output pipe 4 to realize secondary cooling treatment, and the cooling effect of the motor 1 is greatly improved, the working efficiency of the motor 1 is improved;
5) loop structure assembly
a. Firstly, two processed stator monomers 15 are sleeved on two sides of a cooling loop coil pipe 13, so that the cooling loop coil pipe 13 is inserted into a positioning hole 23 between the two stator monomers 15, then a clamping block 19 on one side of the stator monomer 15 is inserted into a clamping groove 18 of the other side of the stator monomer 15, and fixed connection is carried out through a fastening screw 21 until the required stator monomers 15 are connected end to end and installed, the cooling loop coil pipe 13 is fixed through the stator monomers 15, the installation and the disassembly of the cooling loop coil pipe 13 are facilitated, and the assembly precision is improved;
b. then the stator 11 is inserted into the shell 8, so that the limiting strip 16 at the outer side of the stator 11 is limited in the limiting groove on the inner side surface of the shell 8, and the stator 11 and the shell 8 are fixed through screws, thereby improving the mounting stability and reliability of the stator 11 and preventing the stator 11 from moving to influence the normal operation of the motor 1 when the motor 1 works;
c. then, fixedly installing the rear end cover 9 at one side of the shell 8, enabling the cooling connecting groove 26 on the rear end cover 9 to be communicated with the two adjacent cooling straight pipes 22, sealing, and simultaneously enabling two interfaces of the cooling loop coil 13 to penetrate through the installation hole 14 on the rear end cover 9, so as to communicate one side of the cooling straight pipes 22 and position the cooling loop coil 13;
d. inserting the processed rotor 12 into the stator 11, connecting one end of the rotor 12 to the center of the rear end cover 9, and limiting the other end of the rotor 12 on the shaft hole of the front end cover 10, so that the front end cover 10 is close to the housing 8, communicating the cooling connecting groove 26 on the front end cover 10 with two adjacent cooling straight pipes 22 in the housing 8, ensuring that the cooling connecting groove 26 on the front end cover 10 and the cooling connecting groove 26 on the rear end cover 9 are arranged in a staggered manner, sealing and fixing the front end cover 10 and the housing 8, realizing the communication of the two adjacent cooling straight pipes 22, and positioning the rotor 12;
e. finally, the processed hot water manifold 2 and the processed cooling water manifold 3 are respectively communicated with a cooling straight pipe 22 in a shell 8 through a first cooling loop output pipe 7 and a first cooling loop input pipe 6, then the hot water manifold 2 and the cooling water manifold 3 are respectively communicated with two interfaces of a cooling loop coil 13 through a second cooling loop output pipe 4 and a second cooling loop input pipe 5, and then the other sides of the hot water manifold 2 and the cooling water manifold 3 are communicated with a refrigerating unit;
6) commissioning of the electric machine 1
The motor 1 is started to operate for 30min, then cooling liquid is continuously input into a cooling straight pipe 22 in a shell 8 through a cooling water manifold 3 by a refrigeration unit through a first cooling loop input pipe 6, the cooling liquid is input into a hot water manifold 2 through a first cooling loop output pipe 7 after heat exchange of the cooling straight pipe 22 and flows to the refrigeration unit to realize primary water cooling, then the cooling liquid is continuously input into a cooling loop coil 13 on the inner side of the shell 8 through the cooling water manifold 3 by a second cooling loop input pipe 5 by the refrigeration unit, the cooling liquid is input into the hot water manifold 2 through a second cooling loop output pipe 4 after heat exchange of the cooling loop coil 13 and flows to the refrigeration unit to realize secondary water cooling.
The mounting method has simple steps, can cool the rotor 12 by air cooling, and then carries out secondary cooling treatment on the motor 1 by cooling water through the first cooling loop input pipe 6, the first cooling loop output pipe 7, the second cooling loop input pipe 5 and the second cooling loop output pipe 4 through the refrigerating unit, thereby improving the working efficiency of the motor 1 and prolonging the service life of the motor.
The motor cooling is implemented by a double-water internal cooling technology and an automatic control compressor cooling mode. The double-water internal cooling is adopted for cooling when the motor operates, and when the electric automobile stops and the motor is at low speed and stops operating, the automatic control system is adopted to control the compressed air to implement air cooling, so that the power density of the automobile motor is improved by implementing the technology and reaches more than 2.5 kW/kg. The size is reduced, the weight is reduced, and the reliability of the motor is improved through a cooling technology.
The technology is applied to the high-efficiency energy-saving motor, and the effect is very obvious. After the technology is used, under the condition of the same power, the number of a machine seat is reduced (material is saved), and the power density of the motor reaches the international leading level (high efficiency). The motor power density is increased from 1.8kW/kg to a level of 2.5 kW/kg. The temperature rise is reduced by 5 ℃, and the reliability of the motor is improved.
The motor cooling is implemented by a double-water internal cooling technology and an automatic control compressor cooling mode. The double-water internal cooling is adopted for cooling when the motor operates, and when the electric automobile stops and the motor is at low speed and stops operating, the automatic control system is adopted to control the compressed air to implement air cooling, so that the power density of the automobile motor is improved by implementing the technology and reaches more than 2.5 kW/kg. The size is reduced, the weight is reduced, and the reliability of the motor is improved through a cooling technology.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to achieve substantially the same technical effects are all covered by the scope of the present invention.
Claims (9)
1. New energy automobile super high efficiency motor cooling system loop structure, its characterized in that: the cooling system comprises a motor, a hot water manifold and a cooling water manifold, wherein the hot water manifold is connected with the motor through a second cooling loop output pipe and a first cooling loop output pipe, the cooling water manifold is connected with the motor through a second cooling loop input pipe and a first cooling loop input pipe, and the hot water manifold is connected with the cooling water manifold and is connected with a refrigerating unit.
2. The new energy automobile ultra-efficient motor cooling system loop structure of claim 1, characterized in that: the motor comprises a shell, a rear end cover, a front end cover, a stator and a rotor, wherein the front end cover and the rear end cover are respectively and fixedly connected to two ends of the shell, the stator is fixedly connected to the inside of the shell, the rotor is rotatably connected to the center of the stator, a first cooling circuit assembly is arranged between the shell and the front end cover and between the rear end cover, and a second cooling circuit assembly is arranged on the stator.
3. The new energy automobile ultra-efficient motor cooling system loop structure of claim 2, characterized in that: and the rear end cover is provided with a mounting hole.
4. The new energy automobile ultra-efficient motor cooling system loop structure of claim 2, characterized in that: first cooling circuit subassembly includes cooling straight tube and cooling linking groove, the cooling straight tube evenly sets up on the shell, and be the annular setting, the front end housing with all be provided with the holding ring on the rear end cap, the cooling links up the groove and evenly sets up on the holding ring, just on the front end housing the cooling link up the groove with on the rear end cap the cooling links up the crisscross setting each other of groove, adjacent two pass through between the cooling straight tube the cooling links up the groove intercommunication, first cooling circuit output tube with first cooling circuit input tube communicates respectively the cooling straight tube.
5. The new energy automobile ultra-efficient motor cooling system loop structure of claim 2, characterized in that: the second cooling circuit assembly comprises a cooling circuit coil, the cooling circuit coil is fixedly connected to the stator, and two ends of the cooling circuit coil are respectively connected with the second cooling circuit output pipe and the second cooling circuit input pipe.
6. The new energy automobile ultra-efficient motor cooling system loop structure of claim 5, characterized in that: the stator comprises stator monomers, the stator monomers are connected end to form an annular structure, a winding groove is formed in the inner side face of each stator monomer, stator windings are arranged in the winding groove, two sides of each stator monomer are symmetrically provided with a clamping block and a clamping groove respectively, the clamping blocks are matched with the clamping grooves, the clamping blocks penetrate through the clamping grooves through fastening screws, and adjacent two stator monomers are fixedly connected.
7. The new energy automobile ultra-efficient motor cooling system loop structure of claim 6, characterized in that: be provided with spacing on the free lateral surface of stator, evenly be provided with the spacing groove on the medial surface of shell, spacing with spacing groove phase-match.
8. The new energy automobile ultra-efficient motor cooling system loop structure of claim 6, characterized in that: and a positioning hole is formed between every two adjacent stator monomers, and the cooling loop coil pipe is matched with the positioning hole.
9. The new energy automobile ultra-efficient motor cooling system loop structure of claim 6, characterized in that: and a clamping groove is formed between the outer side surfaces of two adjacent stator monomers.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113915642A (en) * | 2021-09-26 | 2022-01-11 | 深圳大学 | Hydrogen fuel direct-drive integrated power propulsion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113915642A (en) * | 2021-09-26 | 2022-01-11 | 深圳大学 | Hydrogen fuel direct-drive integrated power propulsion device |
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