CN114244023A - Three-in-one electric drive integrated system - Google Patents
Three-in-one electric drive integrated system Download PDFInfo
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- CN114244023A CN114244023A CN202111618967.2A CN202111618967A CN114244023A CN 114244023 A CN114244023 A CN 114244023A CN 202111618967 A CN202111618967 A CN 202111618967A CN 114244023 A CN114244023 A CN 114244023A
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- oil
- cooling
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- speed reducer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
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- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a three-in-one electric drive integrated system of a new energy automobile, which comprises an oil cooling loop and a water cooling loop, wherein the oil cooling loop and the water cooling loop are arranged among a motor, a speed reducer and a controller, oil in the speed reducer is thrown from a low liquid level to a high liquid level by utilizing the rotation of a gear in the speed reducer, part of the oil is guided to a motor shaft of the motor to be used as cooling oil, an oil injection hole is arranged on the motor shaft, the cooling oil is sprayed to a stator winding area and a bearing area by utilizing the centrifugal force of the rotation of the motor shaft, so that oil cooling for a stator winding of the motor and lubrication for the bearing are formed, and the cooling oil in the motor flows back to the speed reducer to form oil cooling circulation; set up the circulation water-cooling circuit simultaneously between motor, reduction gear and controller, and form the heat exchange between the water-cooling circuit that is located motor and reduction gear oil pan and the oil-cooling circuit, form the cooling water to the cooling of casing and cooling oil to form the oil-water composite cooling effect to trinity electric drive integrated system, improve the moment of torsion capacity and the power capacity of motor.
Description
Technical Field
The invention belongs to the technical field of motor equipment, and particularly relates to a three-in-one electric drive integrated system capable of being used for a new energy automobile.
Background
At present, with the rapid development of the new energy automobile market, the demands for light weight, integration and high efficiency of a pure electric system are higher and higher. The cooling treatment of the three-in-one electric drive integrated system formed by the motor, the speed reducer and the controller mainly takes water cooling or oil cooling as a main part.
The water cooling mode is mainly to transmit the heat inside the motor to the shell water channel through the stator core and the motor shell, and then to take away the heat by the aid of cooling water flowing through the shell water channel. However, the heat in the stator winding region needs to pass through the insulating layer in the slot and the motor stator to be transferred to the motor shell to be taken away by cooling water, so that the heat transfer path is long, the stator winding cannot be directly cooled, and the cooling efficiency is not ideal.
The oil cooling mode is that the cooling oil directly enters the interior of the motor by virtue of the characteristics of non-magnetic conductivity and non-electric conductivity of the cooling oil, so that the cooling oil is directly contacted with a heat source to achieve the effect of quickly taking away heat. However, a large amount of experimental data show that the oil temperature of the whole system is always kept at a high temperature of 80-85 ℃ in the working process of the motor under the condition of using an oil cooling mode, so that the total cooling power is limited, and the cooling effect is still not ideal.
In addition, with increasingly higher power/torque density requirements, the current conventional three-in-one electric drive integrated systems also run the risk of shaft current failure.
Disclosure of Invention
In view of the above, the present invention discloses a three-in-one electrically driven integrated system to overcome or at least partially solve the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a three-in-one electric drive integrated system comprises a motor, a speed reducer and a controller, wherein the motor and the speed reducer are coaxial and share a shell, and the three-in-one electric drive integrated system adopts two cooling modes to synchronously work and respectively comprises an oil cooling loop and a water cooling loop; the cooling water in the water cooling loop is powered by an external power source, enters the controller from a water inlet of the controller, enters a motor shell of the motor, flows into the speed reducer through an external water path connecting pipe after coming out of the motor shell, and provides cooling for lubricating oil of the speed reducer; the oil cooling circuit is in this trinity electric drive integrated system's internal circulation, relies on the rotatory lubricating oil that stirs of reduction gear wheel, makes its lubricated inside spare part of reduction gear to some lubricating oil that gets rid of is collected, then gets into through external oil circuit connecting pipe the motor shaft of motor relies on centrifugal force that produces when the motor shaft is rotatory is followed fluid oil is followed the nozzle opening on the motor shaft is thrown away, thereby cools off the winding tip and provides the lubrication for the bearing.
Further, the oil cooling circuit comprises a first oil cooling circuit section and an oil collecting tank, the first oil cooling circuit section is located inside a motor shaft of the motor and is arranged along the axial direction of the motor shaft, and the oil collecting tank is arranged in a shell of the motor, is communicated with the inside of the motor and is used for collecting oil inside the motor; the oil injection hole is arranged on the motor shaft along the radial direction, one end of the oil injection hole is communicated with the first oil cooling loop section, and the other end of the oil injection hole points to the stator winding area and the bearing area of the motor; the water cooling circuit comprises a first water cooling circuit section which is positioned on the motor shell and exchanges heat with the cooling oil in the oil collecting tank.
Further, the motor shell is a stretching shell, a hollow structure is arranged inside the stretching shell, and the hollow structure is used as the first water-cooling loop section.
Further, the oil cooling loop further comprises a second oil cooling loop section, and the water cooling loop further comprises a second water cooling loop section; the second oil cooling circuit section is positioned in the speed reducer and used for cooling the inside of the speed reducer; the second water-cooling loop section is located on a shell of the speed reducer, and heat exchange is formed between the second water-cooling loop section and the second oil-cooling loop section.
Further, the second oil-cooled loop section is communicated with the first oil-cooled loop section to form an internal circulation loop.
Furthermore, a guide plate is arranged inside the speed reducer; the guide plate is located at the connecting position of the second oil cooling loop and the first oil cooling loop and used for guiding and shunting part of cooling oil of the second oil cooling loop section to enable the cooling oil to enter the first oil cooling loop section.
Furthermore, the guide plate is movably connected with the shell of the speed reducer and used for adjusting the quantity of cooling oil entering the first oil cooling loop section.
Further, the speed reducer is provided with an oil pan for collecting cooling oil inside the speed reducer; the second water cooling circuit section is located at the oil pan.
Further, the water-cooling circuit comprises a third water-cooling circuit section; the controller is connected with the motor, and the third water-cooling loop section is located on the controller.
Further, the three-in-one electrically-driven integrated system also comprises a conductive brush; the conductive brush is connected to a rear end cover of the motor and is brought into sliding contact with an outer surface of the motor shaft in a diameter direction of the motor shaft.
The invention has the advantages and beneficial effects that:
in the three-in-one electric drive integrated system, the oil cooling loop and the water cooling loop are arranged among the motor, the speed reducer and the controller, oil in the speed reducer is thrown from a lower liquid level to a higher liquid level by utilizing the rotation of a gear in the speed reducer, a part of the oil is guided into a motor shaft of the motor, an oil injection hole is arranged on the motor shaft, cooling oil is sprayed to a stator winding area by utilizing the centrifugal force generated by the rotation of the motor shaft, so that the cooling of a stator winding of the motor and the lubrication of a bearing are formed, and the cooling oil in the motor flows back to the three-in-one speed reducer through the oil collecting tank, so that the oil cooling circulation in the electric drive integrated system, namely the oil cooling circulation in the communication relationship between the interior of the motor and the interior of the speed reducer is formed. Simultaneously, at the motor, set up circulation water cooling circuit between reduction gear and the controller, and the heat exchange that forms between the water cooling circuit that is located motor and reduction gear oil pan and the oil cooling circuit, form the cooling water to the cooling of casing and cooling oil, thereby form the profit composite cooling effect to this trinity electric drive integrated system, improve the heat-sinking capability of motor, improve the moment of torsion capacity and the power capacity of motor, and make this trinity electric drive integrated system small, easily whole car arranges, effective reduce cost.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic view of the front view direction configuration of the three-in-one electric drive integrated system of the present embodiment;
FIG. 2 is a schematic diagram of the right-view direction outline structure of the three-in-one electric-driving integrated system of the present embodiment;
FIG. 3 is a schematic cross-sectional view of the three-in-one electric drive integration system of FIG. 1;
fig. 4 is a schematic structural diagram of an external shape of a motor housing in the three-in-one electric drive integrated system according to the present embodiment;
FIG. 5 is a partial schematic structural diagram of the interior of a retarder in the three-in-one electric-driven integrated system according to the present embodiment;
FIG. 6 is a schematic partial structural diagram of a second water cooling circuit section in the three-in-one electric drive integrated system of the present embodiment;
FIG. 7 is a schematic partial structural diagram of a third water cooling circuit section in the three-in-one electric drive integrated system of the present embodiment;
FIG. 8 is a schematic view of a partial structure of the positional relationship among the motor shaft, the oil-way connecting pipe and the conductive brush in the three-in-one electric-driving integrated system of the present embodiment;
fig. 9 is a schematic diagram of an oil cooling circuit and a water cooling circuit in the three-in-one electric drive integrated system of the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, the three-in-one electric drive integrated system of the present embodiment includes a motor 1, an oil cooling circuit 2, and a water cooling circuit 3. The oil-cooling circuit 2 is provided with cooling oil flowing therein and has a first oil-cooling circuit section 21. The first oil cooling circuit section 21 is located inside the motor shaft 11 in the motor 1 and is disposed in the axial direction of the motor shaft 11 so that cooling oil flows inside the motor shaft 11. Meanwhile, an oil injection hole 111 is formed in the motor shaft 11, one end of the oil injection hole 111 is communicated with the first oil-cooled circuit section 21, and the other end of the oil injection hole 111 points to the stator winding area 12 inside the motor 1, so that cooling oil is introduced into the stator winding area 12 from the first oil-cooled circuit section 21. The inside of the water cooling loop 3 is provided with flowing cooling water, and heat exchange is formed between the water cooling loop 3 and the oil cooling loop 2, so that cooling treatment of cooling oil by the cooling water is realized.
In this embodiment, the first oil cooling loop section is arranged inside the motor shaft of the motor to guide the cooling oil into the motor shaft, and the oil injection hole communicated with the first oil cooling loop section is arranged on the motor shaft, so that in the process of high-speed rotation of the motor shaft, the cooling oil in the first oil cooling loop section is injected to the stator winding area through the oil injection hole by centrifugal force, and direct oil cooling treatment on the stator winding inside the motor is realized. Meanwhile, the cooling water is formed to cool the cooling oil by means of the heat exchange formed between the water cooling loop and the oil cooling loop, so that the lower oil temperature of the oil cooling loop is obtained. Like this, when forming direct accurate cooling and temperature reduction processing with the help of the accurate drainage of coolant oil to motor inside and utilizing the coolant oil to the inside heat source region of motor with the help of the motor shaft, the cooling water that recycles and has higher heat exchange rate carries out cooling and temperature reduction processing to the coolant oil to form rapid cooling to the coolant oil, and then improve the cooling effect of coolant oil to motor inside, finally obtain the better cooling effect to this trinity electric drive integrated system.
Referring to fig. 3, a plurality of oil spray holes 111 are provided on the motor shaft 11 of the present embodiment, including the oil spray holes 111 directed to the stator winding region 12 and the oil spray holes 111 directed to the bearing. Like this, not only can carry out accurate oil cooling to the stator winding region and handle, but also can cool off and lubricate the processing to the bearing, improve the oil cooling effect to whole motor inside, can also play good lubricated effect to the bearing in addition, can reduce the bearing risk of losing efficacy, improve trinity electric drive integrated system's work efficiency.
Certainly, in other embodiments, according to the different and different service environments of motor internal structure form the condition that need carry out oil cooling treatment to different inside regions of motor, can adjust the position and the quantity of offering the nozzle opening on the motor shaft to reach the cooperation structural style through first oil cooling return circuit section and nozzle opening, realize the accurate oil cooling to different inside regions of motor and handle with the lubrication.
Referring to fig. 4, in the present embodiment, the water-cooling circuit 3 includes a first water-cooling circuit section 31, and the first water-cooling circuit section 31 is located on the motor housing 13, while the oil-cooling circuit 2 further includes an oil collecting tank 22, and the oil collecting tank 22 is also disposed on the motor housing 13 and is communicated with the inside of the motor 1 through oil guiding holes opened on the motor end cover, so as to collect the cooling oil inside the motor, and prevent the cooling oil inside the motor from being too much to submerge the air gap. The first water-cooled circuit section 31 passes through the location of the oil sump 22 to effect heat exchange with the cooling oil within the oil sump 22.
At the moment, the cooling oil inside the motor is cooled through the heat exchange treatment formed by the first water-cooling loop section in the water-cooling loop and the cooling oil collected in the oil collecting tank, so that the cooling oil is cooled, and the water-cooling treatment of the cooling oil is realized. Meanwhile, the first water cooling loop section is arranged on the motor shell, and water cooling treatment on the motor shell can be achieved by means of the water cooling loop, so that the water cooling utilization rate is improved, and the cooling effect on the motor is improved.
Preferably, in the present embodiment, the motor housing 13 is a drawn housing, and a hollow structure is provided inside the drawn housing, so that the hollow structure inside the motor housing 13 is used as the first water-cooling circuit section 31, that is, the interlayer of the motor housing is used as the first water-cooling circuit section. Like this, not only can reduce whole motor casing's weight, realize the lightweight design of motor, place first water-cooling return circuit section in motor casing inside moreover, reach the integrated design to motor casing and first water-cooling return circuit section, improved integrating of trinity electric drive integrated system.
In the embodiment, a plurality of axial hollow channels distributed along the circumferential direction of the motor shell are arranged on the motor shell, and then the hollow channels are subjected to staggered communication and plugging at two ends between adjacent hollow channels, so that a first water-cooling loop section which is continuously and reciprocally folded back along the axial direction of the motor shell is formed as shown in fig. 4. Meanwhile, a motor water inlet 131 and a motor water outlet 132 are formed in the motor housing, so that the cooling water flows through the motor housing in a circulating manner. Of course, in other embodiments, depending on the structure of the motor, the first water-cooling circuit section may be designed in other ways, for example, in a coil form wound around the outside of the motor housing, or even in a separate heat exchanger structure fixed to the motor housing by a detachable connection, so as to achieve the cooling process of the oil-cooling circuit.
Referring to fig. 1, the three-in-one electric driving integrated system of the present embodiment further includes a speed reducer 4, and the speed reducer 4 and the motor 1 are connected by a coaxial and common housing. Therefore, the integrated design of the motor and the speed reducer can be realized, the coaxial precision of the connection of the motor and the speed reducer can be improved, the structural rigidity of the motor and the speed reducer assembly is improved, and the vibration noise is reduced.
As shown in fig. 5 and 6, in the present embodiment, the oil-cooling circuit 2 further includes a second oil-cooling circuit section 23, and the water-cooling circuit 3 further includes a second water-cooling circuit section 32. The second oil-cooling circuit section 23 is located inside the transmission 4 and cools the inside of the transmission 4. The second water-cooling circuit section 32 is located in the housing of the retarder 4, and heat exchange is performed between the second water-cooling circuit section 32 and the second oil-cooling circuit section 23, so that the cooling treatment of the cooling oil in the second oil-cooling circuit section is performed by the cooling water in the second water-cooling circuit section.
At the moment, the oil cooling loop is used for cooling the motor through the first oil cooling loop section, meanwhile, the second oil cooling loop section is used for cooling the speed reducer, and the second water cooling loop section is used for carrying out water cooling treatment on the second oil cooling loop section in the water cooling loop, so that the temperature of cooling oil in the second oil cooling loop section is greatly reduced, and the cooling effect on the speed reducer is improved.
As shown in fig. 5 and 6, the reduction gear 4 of the present embodiment is provided with an oil pan 41. The oil pan 41 serves to collect cooling oil inside the reduction gear 4 and as part of the second oil-cooling circuit section 23, while part of the second water-cooling circuit section 32 is located at the oil pan 41.
At the moment, the cooling oil in the oil pan is cooled through the second water cooling loop section, so that the cooling oil in the second oil cooling loop section is cooled. Wherein, the second water-cooling return circuit section adopts the direct design that sets up at reduction gear housing inside, for example direct casting forms or adopts the structural design of fluting and closing cap, like this, not only can reduce the heat exchange distance of second water-cooling return circuit section internal cooling water and oil pan internal cooling oil, improves heat exchange efficiency, but also can reduce the second water-cooling return circuit section and account for the space, improves the integration of whole trinity electric drive integrated system.
Of course, in other embodiments, the cooling process of the second oil-cooling circuit section by the second water-cooling circuit section may be performed in other manners, for example, the cooling oil in the second oil-cooling circuit section is led out to the outside of the speed reducer by an external pipeline, and then the heat exchange process is performed on the second oil-cooling circuit section by the second water-cooling circuit section in the form of a heat exchanger or a coil.
Preferably, as shown in fig. 1 and 5, an oil passage connection pipe 24 is provided between the motor 1 and the speed reducer 4 of the present embodiment. One end of the oil passage connection pipe 24 extends into the motor shaft 11 of the motor 1 near one end of the rear end cover and is formed to communicate with the first oil cooling circuit section 21, and the other end is located at the housing of the speed reducer 4 and is formed to communicate with the second oil cooling circuit section 23, thereby communicating the second oil cooling circuit section 23 with the first oil cooling circuit section 21.
At the moment, cooling oil with a lubricating function is selected and injected into the speed reducer, and in the normal working process of the speed reducer, a part of the internal gear of the speed reducer is soaked in the cooling oil in the oil pan. Therefore, when the speed reducer rotates, the cooling oil in the oil pan can be brought by the gear inside the speed reducer and thrown to different positions inside the speed reducer, so that lubrication of parts inside the speed reducer is achieved, under the condition, the inner cavity of the whole speed reducer can be regarded as a second oil cooling loop section, part of the cooling oil enters the oil path connecting pipe under the throwing action of the gear, and then enters the first oil cooling loop section through the oil path connecting pipe, namely enters the motor shaft of the motor, and further direct oil cooling and lubrication inside the motor are achieved.
Through setting up the oil circuit connecting pipe with second oil cooling return circuit section and first oil cooling return circuit section intercommunication to carry out motor oil cooling system and reduction gear oil cooling system and integrate formula as an organic whole, form the inside oil cooling circulation that is located this trinity electric drive integrated system. Like this, not only can further improve the integrated level of whole trinity electric drive integrated system, especially this trinity electric drive integrated system cooling structure's integrated level, but also can form the water-cooling treatment to the different regions in whole oil cooling circuit with the help of first water-cooling return circuit section and second water-cooling return circuit section, improve the cooling effect to the coolant oil, and then improve the cooling effect to whole trinity electric drive integrated system.
Further, as shown in fig. 1 and 5, a water path connection pipe 33 is further provided between the motor 1 and the reducer 4 in the present embodiment. One end of the waterway connection pipe 33 extends to the motor outlet 132 to communicate with the first water-cooled circuit section 31, and the other end is located at the housing of the decelerator 4 to communicate with the second water-cooled circuit section 32, thereby communicating the first water-cooled circuit section 31 and the second water-cooled circuit section 32.
At this moment, the first water-cooling loop section and the second water-cooling loop section are communicated through the arrangement of the water path connecting pipe, so that the motor water-cooling system and the speed reducer water-cooling system are integrated into a whole. Like this, not only can further improve the integrated level of whole trinity electric drive integrated system, especially this trinity electric drive integrated system cooling structure's integrated level, but also can improve the utilization ratio to the cooling water.
In addition, in this embodiment, for the motor and the speed reducer which adopt a coaxial common-shell design, the oil collecting tank of the motor housing and the oil pan of the speed reducer are further communicated, so that the second oil-cooled loop section and the first oil-cooled loop section are communicated again, the second oil-cooled loop section and the first oil-cooled loop section form a circulation loop, that is, the oil-cooled loop forms a circulation loop, and the integration level of the oil-cooled system in the three-in-one electric drive integrated system is further improved.
Of course, in other embodiments, according to different design and use conditions, an oil hole communicated with the outside may be formed in a corresponding position of the oil collecting tank to lead out and introduce cooling oil in the oil collecting tank, so as to achieve operations such as supplementing, replacing, and detecting the cooling oil.
In addition, as shown in fig. 3, in the present embodiment, the oil-cooling circuit 2 further includes a third oil-cooling circuit section 25 based on the coaxial common-casing design of the motor 1 and the reduction gear 4. The third oil-cooled circuit section 25 is located at the front end of the motor shaft 11, and has one end communicating with the second oil-cooled circuit section 23, i.e., communicating with the inner cavity of the reduction gear 4, and the other end communicating with the front end bearing area of the motor 1 through an oil jet hole 111 provided on the motor shaft 11.
Like this, through seting up in the third oil-cooling circuit section of motor shaft front end, not only can reach the cooling oil drainage to motor front end bearing department, reach the cooling lubrication to front end bearing, but also can shorten the drainage distance to the cooling oil, improve the cooling lubrication efficiency to front end bearing. Of course, in other embodiments, according to the size, especially the length size, of the motor shaft in the motor, the length size relationship between the first oil cooling loop section and the third oil cooling loop section provided inside the motor can be adjusted, so as to achieve the effect of directly cooling the inside of the motor by oil.
As shown in fig. 5, a baffle 42 is provided inside the speed reducer 4 according to the present embodiment. The deflector 42 is located in the upper region of the gear for forming throwing-out gear for the cooling oil inside the speed reducer 4, and is used for conducting drainage and diversion treatment on the cooling oil thrown out by the gear, so that part of the cooling oil can enter the oil way connecting pipe 24 and then enter the first oil cooling loop section 21. At the moment, the diversion operation of the cooling oil in the speed reducer is performed by means of the diversion plate, so that the purpose of diverting partial cooling oil to the inside of the motor is achieved, and the diversion effect of the cooling oil between the first oil-cooled loop section and the second oil-cooled loop section is achieved.
Furthermore, the guide plate and the shell of the speed reducer can be movably connected, for example, the guide plate and the shell of the speed reducer are rotatably connected through a rotating shaft. Like this, can control the guide plate through the adjustment pivot and carry out the back and forth swing in the casing inside of reduction gear to the cooperation forms between the casing of adjustment guide plate and reduction gear and carries out the passageway cross-sectional dimension proportional relation of drainage respectively and reposition of redundant personnel to first oil cooling return circuit section and second oil cooling return circuit section to the cooling oil, and then the adjustment carries out the cooling oil mass proportional relation of oil cooling processing to motor and reduction gear, the oil cooling processing of balanced motor and reduction gear, finally reach the promotion to whole trinity electric drive integrated system oil cooling treatment effect.
As shown in fig. 1 and 7, the three-in-one electric drive integrated system of the present embodiment is further provided with a controller 5, and the controller 5 is fixedly mounted on the motor housing 13. Meanwhile, the water-cooling circuit 3 further includes a third water-cooling circuit section 34, and the third water-cooling circuit section 34 is located at the controller 5, and is used for performing water-cooling treatment on the controller 5.
At this moment, through set up the controller on the motor to form the trinity actuating system design of constituteing by motor, reduction gear and controller, in order to reach new energy automobile market to pure electric system lightweight, integrate and the demand of high efficiency, improve the integrated design of whole trinity electric drive integrated system, reduce the volume, in order to put in order the car and arrange, reduce whole car weight and cost.
Further, as shown in fig. 1, 4 and 6, a controller water inlet 51 is provided on the controller 5 for introducing cooling water into the third water-cooling circuit section 34, that is, one end of the third water-cooling circuit section 34 is communicated with the controller water inlet 51, and the other end of the third water-cooling circuit section 34 is communicated with the motor water inlet 131 through a connecting pipe 52 after being spirally bent inside the controller 5, so that the third water-cooling circuit section 34 is communicated with the first water-cooling circuit section 31, and at the same time, the communication of the entire water-cooling circuit 3, that is, the third water-cooling circuit section 34, the first water-cooling circuit section 31 and the second water-cooling circuit section 32 are sequentially communicated in series through the water passage connecting pipe 33, and a decelerator water outlet 43 is provided on the decelerator 4, the decelerator water outlet 43 is communicated with the second water-cooling circuit section 32, for leading out cooling water in the water cooling circuit 3.
Like this, not only can optimize the pipeline design of whole water-cooling circuit, improve water cooling system's among the whole trinity electric drive integrated system integration, but also can improve the utilization ratio of whole water cooling system to the cooling water, and then improve the cooling effect to whole trinity electric drive integrated system.
As shown in fig. 8, a conductive brush 14 is further provided in the motor 1 of the present embodiment. The conductive brush 14 is connected to a rear end cover of the motor 1 and is brought into sliding contact with an outer surface of a projecting end in the motor shaft 11 in a diameter direction of the motor shaft 11. Like this, can reduce the axle current through setting up electrically conductive brush, reduce bearing galvanic corrosion, improve the life and the job stabilization nature of whole trinity electric drive integrated system.
In addition, as shown in fig. 2, a grounding point 133 and a hoisting hole 134 are provided on the motor housing 13 of the present embodiment, respectively, for grounding connection and hoisting operation of the motor. In other embodiments, according to different design and use conditions, a ventilation plug and a drain plug can be arranged at different positions to be respectively used for exhausting to prevent insulation failure and oil replacement treatment caused by internal gas condensation.
Referring to fig. 9, in the present embodiment, the cooling water is output to the controller housing through the water tank, and then flows through the motor housing and the reducer housing in sequence and then flows back to the water tank, thereby forming a circulating water cooling loop. The cooling oil is thrown to a high liquid level from a low liquid level by the self rotation of the speed reducer gear in the speed reducer oil tank, one part of the cooling oil is guided to the motor shaft of the motor, the cooling oil positioned on the motor shaft of the motor is sprayed to the motor stator through the oil spray holes to form direct oil cooling on the motor stator in the rotation process of the motor shaft of the motor, and the cooling oil in the motor shell flows back to the speed reducer oil tank again, so that a circulating oil cooling loop is formed. Meanwhile, the oil tank of the speed reducer is cooled at the position of the speed reducer shell, and the stator of the motor is cooled at the position of the motor shell, so that oil-water composite cooling of the three-in-one electric drive integrated system is formed.
While the foregoing is directed to embodiments of the present invention, other modifications and variations of the present invention may be devised by those skilled in the art in light of the above teachings. It should be understood by those skilled in the art that the foregoing detailed description is for the purpose of better explaining the present invention, and the scope of the present invention should be determined by the scope of the appended claims.
Claims (10)
1. A three-in-one electric drive integrated system is characterized by comprising a motor, a speed reducer and a controller, wherein the motor and the speed reducer are coaxially connected in a shell, and the three-in-one electric drive integrated system adopts two cooling modes to synchronously work and respectively comprises an oil cooling loop and a water cooling loop; the cooling water in the water cooling loop is powered by an external power source, enters the controller from a water inlet of the controller, enters a motor shell of the motor, flows into the speed reducer through an external water path connecting pipe after coming out of the motor shell, and provides cooling for lubricating oil of the speed reducer; the oil cooling circuit is in this trinity electric drive integrated system's internal circulation, relies on the rotatory lubricating oil that stirs of reduction gear wheel, makes its lubricated inside spare part of reduction gear to some lubricating oil that gets rid of is collected, then gets into through external oil circuit connecting pipe the motor shaft of motor relies on centrifugal force that produces when the motor shaft is rotatory is followed fluid oil is followed the nozzle opening on the motor shaft is thrown away, thereby cools off stator winding and provides the lubrication for the bearing.
2. The integrated three-in-one electric drive system of claim 1, wherein the oil cooling circuit comprises a first oil cooling circuit section and an oil sump, the first oil cooling circuit section is located inside and axially along a motor shaft of the motor, and the oil sump is located in a housing of the motor and communicates with the inside of the motor for collecting oil inside the motor; the oil injection hole is arranged along the radial direction of the motor shaft, one end of the oil injection hole is communicated with the first oil cooling loop section, and the other end of the oil injection hole points to the stator winding area and the bearing area of the motor; the water cooling circuit comprises a first water cooling circuit section which is positioned on the motor shell and exchanges heat with the cooling oil in the oil collecting tank.
3. The integrated three-in-one electric drive system as claimed in claim 2, wherein the motor housing is a tension housing, and a hollow structure is disposed inside the tension housing, and serves as the first water cooling loop section.
4. The integrated three-in-one electric drive system of claim 2, wherein the oil-cooled circuit further comprises a second oil-cooled circuit section, and the water-cooled circuit further comprises a second water-cooled circuit section; the second oil cooling circuit section is positioned in the speed reducer and used for cooling the inside of the speed reducer; the second water-cooling loop section is located on a shell of the speed reducer, and heat exchange is formed between the second water-cooling loop section and the second oil-cooling loop section.
5. The integrated three-in-one electric drive system of claim 4, wherein the second oil-cooled circuit segment is in communication with the first oil-cooled circuit segment to form an internal circulation circuit.
6. The three-in-one electric drive integrated system according to claim 5, wherein a baffle is arranged inside the speed reducer; the guide plate is located at the connecting position of the second oil-cooled loop section and the first oil-cooled loop section and used for guiding and shunting part of cooling oil of the second oil-cooled loop section to enable the cooling oil to enter the first oil-cooled loop section.
7. The integrated three-in-one electric drive system of claim 6, wherein the deflector is movably connected to the housing of the speed reducer for adjusting the amount of cooling oil entering the first oil cooling circuit section.
8. The integrated three-in-one electric drive system of claim 4, wherein the speed reducer is provided with an oil pan for collecting cooling oil inside the speed reducer; and the second water-cooling loop section flows through the oil pan and exchanges heat with cooling oil in the oil pan.
9. The integrated, three-in-one, electric drive system of any of claims 1-8, wherein the water cooling circuit comprises a third water cooling circuit section; the controller is connected with the motor, and the third water-cooling loop section is located on the controller.
10. The three-in-one electrically driven integrated system of any one of claims 1-8, further comprising a conductive brush; the conductive brush is connected to a rear end cover of the motor and is brought into sliding contact with an outer surface of the motor shaft in a diameter direction of the motor shaft.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111618967.2A CN114244023A (en) | 2021-12-27 | 2021-12-27 | Three-in-one electric drive integrated system |
| PCT/CN2022/092707 WO2023123819A1 (en) | 2021-12-27 | 2022-05-13 | Three-in-one electric drive integrated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111618967.2A CN114244023A (en) | 2021-12-27 | 2021-12-27 | Three-in-one electric drive integrated system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114244023A true CN114244023A (en) | 2022-03-25 |
Family
ID=80763878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111618967.2A Pending CN114244023A (en) | 2021-12-27 | 2021-12-27 | Three-in-one electric drive integrated system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114244023A (en) |
| WO (1) | WO2023123819A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123819A1 (en) * | 2021-12-27 | 2023-07-06 | 精进电动科技股份有限公司 | Three-in-one electric drive integrated system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050013761A (en) * | 2003-07-29 | 2005-02-05 | 기아자동차주식회사 | A water cooled engine oil system |
| CN109756056A (en) * | 2017-11-07 | 2019-05-14 | 华为技术有限公司 | Motor, power assembly, power-equipment and motor cooling means |
| CN110729856A (en) * | 2019-09-03 | 2020-01-24 | 精进电动科技股份有限公司 | Oil-water double-cooling electric drive assembly and new energy automobile |
| CN111431346B (en) * | 2019-10-25 | 2021-09-10 | 襄阳中车电机技术有限公司 | Trinity electric drive assembly of new energy automobile |
| CN112092607A (en) * | 2020-09-18 | 2020-12-18 | 中国第一汽车股份有限公司 | Hybrid cooling system of electric drive system and vehicle |
| CN216981727U (en) * | 2021-12-27 | 2022-07-15 | 精进电动科技股份有限公司 | Three-in-one electric drive integrated system |
| CN114244023A (en) * | 2021-12-27 | 2022-03-25 | 精进电动科技股份有限公司 | Three-in-one electric drive integrated system |
-
2021
- 2021-12-27 CN CN202111618967.2A patent/CN114244023A/en active Pending
-
2022
- 2022-05-13 WO PCT/CN2022/092707 patent/WO2023123819A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123819A1 (en) * | 2021-12-27 | 2023-07-06 | 精进电动科技股份有限公司 | Three-in-one electric drive integrated system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023123819A1 (en) | 2023-07-06 |
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