CN212811449U

CN212811449U - New forms of energy power assembly cooling structure

Info

Publication number: CN212811449U
Application number: CN202021548729.XU
Authority: CN
Inventors: 陈超超; 杜鹏; 刘增玥
Original assignee: Chongqing Tsingshan Industrial Co Ltd
Current assignee: Chongqing Tsingshan Industrial Co Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-03-26
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a new energy power assembly cooling structure, one end of a first middle communicating part is communicated with a first groove, and one end of a second middle communicating part is communicated with a second groove; the axial end face, facing the shared part, of the inner cooling sleeve is provided with a third groove which is provided with an inlet and an outlet and has a labyrinth structure, the other end of the first middle communicating part is communicated with the inlet of the third groove, and the other end of the second middle communicating part is communicated with the outlet of the third groove; after the inner cooling jacket is matched with the outer cooling jacket, the first groove is combined with the inner wall surface of the inner cooling jacket to form an input cooling channel, the second groove is combined with the inner wall surface of the inner cooling jacket to form an output cooling channel, the inner cooling jacket is matched with the shared part to form a shared part cooling channel, and the middle communicating part is combined with the inner wall surface of the inner cooling jacket to form a cooling communicating channel which is used for connecting the shared part cooling channel with the input cooling channel and the output cooling channel. The utility model has the advantages of improve cooling efficiency.

Description

New forms of energy power assembly cooling structure

Technical Field

The utility model relates to an automotive transmission technical field, in particular to new forms of energy power assembly cooling structure.

Background

New energy power assembly is the development trend of the automobile industry in the future. In the mixed product of the motor, the controller and the speed changer and the three-in-one pure electric system of the speed reducer, the motor and the speed changer (or the speed reducer) have heating phenomena, and the system heat dissipation structure has great influence on the motor performance and the speed changer lubrication.

In the current common driving system structure, there are derailleur end because of the clutch calorific capacity is big, the derailleur oil temperature is high, needs the outside oil cooler that increases to cool off lubricating oil, the problem that the total cost is high.

In order to solve the problems, the lubricating oil cooling scheme of the transmission commonly used at present is an oil cooler.

Disclosure of Invention

The utility model provides a can improve cooling efficiency's new forms of energy power assembly cooling structure.

The technical scheme for realizing the purpose is as follows:

the new energy power assembly cooling structure comprises a transmission shell and a motor shell, wherein a shared part is formed between the transmission shell and the motor shell after one end of the transmission shell is connected with one end of the motor shell, the motor shell comprises an outer cold sleeve and an inner cold sleeve positioned in an inner cavity of the outer cold sleeve, a first groove and a second groove are formed in the outer peripheral surface of the inner cold sleeve, a middle communicating part is further arranged on the outer peripheral surface of the inner cold sleeve, the middle communicating part comprises a first middle communicating part and a second middle communicating part, one end of the first middle communicating part is communicated with the first groove, and one end of the second middle communicating part is communicated with the second groove;

the axial end face, facing the shared part, of the inner cooling sleeve is provided with a third groove which is provided with an inlet and an outlet and has a labyrinth structure, the other end of the first middle communicating part is communicated with the inlet of the third groove, and the other end of the second middle communicating part is communicated with the outlet of the third groove;

after the inner cooling jacket is matched with the outer cooling jacket, the first groove is combined with the inner wall surface of the inner cooling jacket to form an input cooling channel, the second groove is combined with the inner wall surface of the inner cooling jacket to form an output cooling channel, the inner cooling jacket is matched with the shared part to form a shared part cooling channel, and the middle communicating part is combined with the inner wall surface of the inner cooling jacket to form a cooling communicating channel which is used for connecting the shared part cooling channel with the input cooling channel and the output cooling channel.

The utility model has the advantages of it is following:

1. because the utility model discloses sharing portion between motor casing and gearbox housing has all formed the passageway that coolant flows through to these passageways are intercommunication, consequently the utility model discloses can take away the heat on motor and the some derailleur simultaneously, make power assembly's total heat dispersion obtain promoting.

2. Because the utility model discloses set cooling structure to the structure of dual channel, increase cooling medium area when increasing heat dissipation area of contact, reinforcing motor heat-sinking capability. The better the heat dissipation capability is, the power reduction working condition can not occur when the motor runs at the peak value.

3. The heat dissipation rib plate enhances the heat dissipation capacity of the transmission end, and when the heat of the transmission taken away by the motor cooling system and the heat dissipation rib plate of the transmission is enough, the oil cooler of the transmission can be even eliminated, so that the cost is saved.

In a word, compare with prior art, the utility model discloses a mode reinforcing power assembly heat-sinking capability of increase heat dissipation area of contact and coolant liquid area.

Drawings

FIG. 1 is a cross-sectional view of a new energy powertrain cooling structure.

FIG. 2 is a schematic illustration of the inner cooling jacket in combination with the transmission housing.

Fig. 3 is a schematic structural diagram of the appearance of the inner cold sleeve.

FIG. 4 is a cross-sectional view of the inner cold sleeve;

fig. 5 is a left side view of fig. 3.

Fig. 6 is a side view of fig. 1.

Fig. 7 is a schematic view of a heat sink rib plate.

1 is the derailleur casing, 2 is the sharing portion, 3 is outer cold sleeve, 4 is interior cold sleeve, 5 is first recess, 6 is the second recess, 7 is the third recess, 7a is the entry, 7B is the export, 8 is the heat dissipation gusset, 9 is the oil trap, 10 is the dead eye terminal surface, 11 is rear end cover box-assembling face, A is the input cooling channel, B is the output cooling channel, C is sharing portion cooling channel, D is the cooling intercommunication passageway.

Detailed Description

The present invention will be described in detail with reference to fig. 1 to 7.

The utility model discloses a new forms of energy power assembly cooling structure, including transmission housing 1, motor casing, the one end of transmission housing 1 is connected the back with motor casing's one end, forms sharing portion 2 between transmission housing 1 and motor casing, and motor casing includes outer cold jacket 3 and is located the interior cold jacket 4 of outer cold jacket 3 inner chambers.

Be equipped with first recess 5 and second recess 6 on the outer peripheral face of interior cold sleeve 4, the outer peripheral face of interior cold sleeve 4 still is equipped with middle intercommunication portion, and intercommunication portion in the middle of middle intercommunication portion includes intercommunication portion in the middle of first middle, the second, and wherein, the one end and the first recess 5 intercommunication of intercommunication portion in the middle of the first, the one end and the second recess 6 intercommunication of intercommunication portion in the middle of the second.

The axial end face of the internal cooling jacket 4 facing the shared part 2 is provided with a third groove 7 which is provided with an inlet 7a and an outlet 7b and has a labyrinth structure, the other end of the first middle communicating part is communicated with the inlet 7a of the third groove 7, and the other end of the second middle communicating part is communicated with the outlet 7b of the third groove 7.

After the inner cooling jacket 4 is matched with the outer cooling jacket 3, the first groove 5 is combined with the inner wall surface of the inner cooling jacket 4 to form an input cooling channel A, the second groove 6 is combined with the inner wall surface of the inner cooling jacket 4 to form an output cooling channel B, the inner cooling jacket 4 is matched with the shared part 2 to form a shared part cooling channel C, and the middle communicating part is combined with the inner wall surface of the inner cooling jacket 4 to form a cooling communicating channel D which is connected with the shared part cooling channel C, the input cooling channel A and the output cooling channel B.

The input cooling channel A, the output cooling channel B and the cooling communication channel D respectively cool the structure (such as a stator) in the motor, the shared part cooling channel C cools the structure (such as a bearing supporting a rotor) in the motor on the one hand and can take away heat on the transmission shell 1 on the other hand, therefore, the cooling structure formed by the input cooling channel A, the output cooling channel B, the cooling communication channel D and the shared part cooling channel C can respectively cool the motor and the transmission, and the cooling efficiency of the new energy power assembly is improved. In addition, the cooling structure is a double-channel structure, namely, the input channel and the output channel of the cooling medium exist on the motor shell or the shared part 2, obviously, the double-channel structure can further improve the cooling efficiency, and the heat dissipation efficiency of the new energy power assembly is improved.

The outer cold sleeve 3 and the transmission shell 1 are integrally formed, and the inner cold sleeve 4 is welded with the transmission shell 1. And (3) filling the cast inner cold sleeve 4 into the outer cold sleeve 3, and welding and sealing the end surface 10 of the bearing hole and the positions of the outer cold sleeve 3 and the box closing surface 11 of the rear end cover by friction stir welding or sealing the end surface and the box closing surface by a sealing ring. After the two are assembled, the inner diameter of the inner cooling sleeve 4, the position of the bearing hole and the like are processed.

The first grooves 5 and the second grooves 6 are alternately spirally wound on the outer peripheral surface of the inner jacket 4, and the input cooling passage a and the output cooling passage B are both spiral passages. The areas of the first grooves 5 and the second grooves 6 for the cooling medium to flow through are the same, that is, the first grooves 5 and the second grooves 6 have the same size, that is, the spiral lengths, the screw pitches, the water passage section lengths a and the widths b of the first grooves 5 and the second grooves 6 are the same. Because the utility model discloses a binary channels structure makes cooling channel's increase in quantity, and heat radiating area compares in the increase of single track water course heat radiating area.

The transmission is characterized by further comprising a heat dissipation rib plate 8 arranged inside the transmission shell 1, wherein an oil collecting groove 9 is formed in the heat dissipation rib plate 8. During processing, the heat dissipation rib plate 8 is firstly formed by punching by a punching process, and the transmission shell 1 is welded together after being cast. Or the heat dissipation rib plate 8 is firstly punched and formed, and the punched heat dissipation rib plate 8 is put into a die to be cast into a whole when the transmission shell 1 is cast.

The utility model discloses a new forms of energy power assembly cooling structure lies in increase thermal contact area and the reinforcing heat-sinking capability of increase cooling liquid area. The heat flux density calculation formula is q ═ Φ/X, where Φ is the heat flux and X is the cross-sectional area in the heat conduction direction.

When the cooling medium passes through a cooling structure formed by the input cooling channel A, the cooling communication channel D, the common part cooling channel C and the output cooling channel B, the calculation formula of the heat carrying capacity is represented by P ═ hXYXDeltat, wherein h is a heat transfer coefficient, Y is the area of the cooling medium flowing in the cooling loop, and Deltat is the temperature difference between water and a pipeline.

The heat transfer coefficient is calculated by h-Nu multiplied by alpha/De, wherein alpha is the heat transfer coefficient of the cooling liquid, Nu is the Nu number of the Russel, and De is the equivalent diameter. The equivalent diameter is calculated as De ═ 4 × Y/U ═ 4 ab)/(2 × (a + b)]Wherein a and B are respectively the length and width of the input cooling channel A, the cooling communication channel D, the shared part cooling channel C and the output cooling channel B. U is the water channel wetted perimeter. The Nu is 0.021Re^0.8Pr^0.43And epsilon r, wherein Re is Reynolds number, Pr is Prandtl number, and epsilon r is the spiral pipeline correction coefficient.

To the power assembly of the same volume, when the flow of the coolant that gets into cooling structure was 8L/min, calculate according to aforementioned computational formula the utility model provides a cooling structure can take away the heat and be 4813W, and the heat that cooling structure that the same single channel such as helical length, pitch did not prolong to the bottom (do not have share portion cooling channel C promptly) can be taken away is 3244W. According to calculation, the utility model discloses a new forms of energy power assembly cooling structure has and makes the increase of cooling medium area and heat radiating area increase its heat-sinking capability of reinforcing.

Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solution of the present invention, but not to limit the technical solution, and the patent scope of the present invention is not limited; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; in addition, will the technical scheme of the utility model direct or indirect application is in other relevant technical field, all including on the same reason the utility model discloses an in the patent protection scope.

Claims

1. The new energy power assembly cooling structure comprises a transmission shell (1) and a motor shell, wherein a sharing part (2) is formed between the transmission shell (1) and the motor shell after one end of the transmission shell (1) is connected with one end of the motor shell, the motor shell comprises an outer cold sleeve (3) and an inner cold sleeve (4) positioned in an inner cavity of the outer cold sleeve (3), and the new energy power assembly cooling structure is characterized in that a first groove (5) and a second groove (6) are formed in the outer peripheral surface of the inner cold sleeve (4), a middle communicating part is further arranged on the outer peripheral surface of the inner cold sleeve (4), the middle communicating part comprises a first middle communicating part and a second middle communicating part, one end of the first middle communicating part is communicated with the first groove (5), and one end of the second middle communicating part is communicated with the second groove (6);

a third groove (7) which is provided with an inlet (7a) and an outlet (7b) and has a labyrinth structure is arranged on the axial end surface of the internal cooling jacket (4) facing the shared part (2), the other end of the first middle communicating part is communicated with the inlet (7a) of the third groove (7), and the other end of the second middle communicating part is communicated with the outlet (7b) of the third groove (7);

after interior cold jacket (4) and outer cold jacket (3) cooperation, first recess (5) combine to form input cooling channel (A) with the internal face of interior cold jacket (4), second recess (6) combine to form output cooling channel (B) with the internal face of interior cold jacket (4), form sharing portion cooling channel (C) after interior cold jacket (4) and sharing portion (2) cooperation, middle intercommunication portion combines to form cooling intercommunication passageway (D) of connecting sharing portion cooling channel (C) and input cooling channel (A) and output cooling channel (B) with the internal face of interior cold jacket (4).

2. The new energy power assembly cooling structure according to claim 1, characterized in that the first grooves (5) and the second grooves (6) are alternately spirally wound on the outer circumferential surface of the inner cooling jacket (4), and the input cooling passage (a) and the output cooling passage (B) are both spiral passages.

3. The new energy powertrain cooling structure of claim 1, characterized in that the outer cold sleeve (3) is formed integrally with the transmission housing (1), and the inner cold sleeve (4) is welded to the transmission housing (1).

4. The new energy power assembly cooling structure according to any one of claims 1 to 3, further comprising a heat dissipation rib plate (8) arranged inside the transmission housing (1), wherein an oil collecting tank (9) is arranged on the heat dissipation rib plate (8).