A double-cooling motor structure

Abstract

The present invention discloses a dual-cooling motor structure in the technical field of new energy electric vehicle motors, comprising a casing, wherein cooling water pipes are respectively inserted through the top and bottom of the casing, a water channel is opened on the shell of the casing, one end of two groups of cooling water pipes are communicated with the inner cavity of the water channel, and the other ends of the two groups of cooling water pipes are both located on the right side outside of the casing, a shaft is inserted through the center of the inner cavity of the casing horizontally, a rotor is sleeved on the center of the outer wall of the shaft, and a stator is sleeved on the outer wall of the rotor; the present invention first directly cools the stator through the cooling water pipe, and then cools the stator again through the water channel in the casing, thereby achieving a dual cooling effect; the cooling oil splashes as the rotor fan installed on the rotor rotates, quickly transferring the heat on the winding to the cooling water pipe and the casing, thereby achieving a fast, dual cooling effect.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy electric vehicle motors, and in particular to a dual-cooling motor structure. Background Art

[0002] Modern motors utilize high electromagnetic loads to improve material utilization. As the capacity of individual motors continues to increase, improvements are necessary to improve motor cooling systems to enhance heat dissipation capabilities. Currently, many motors utilize air or water cooling, both of which are indirect cooling methods. Most water-cooled motors utilize a water jacket cooling system, where the coolant cools the outer casing, which in turn cools the stator within the motor. The stator laminations require welding or bolting to prevent them from loosening. Traditional water-cooled motors typically weld the stator core first, then shrink fit it into the motor casing, which contains a water channel. Heat dissipation in the motor is achieved by conducting heat from the core to the casing, where it is then dissipated by coolant flowing through the cooling channels within the casing. Since the stator is the source of heat, cooling through the casing results in low heat dissipation efficiency and lacks direct cooling. This ineffectiveness prevents motors from operating under conditions such as frequent starts and overloads. The core's exterior requires welding or other securing methods to prevent warping of the end laminations. Based on this, the present invention designs a double-cooling motor structure to solve the above problems. Summary of the Invention

[0003] The object of the present invention is to provide a dual-cooling motor structure to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a dual-cooling motor structure, comprising a casing, wherein cooling water pipes are respectively inserted through the top and bottom of the casing, a water channel is opened on the shell of the casing, one end of the two groups of cooling water pipes are communicated with the inner cavity of the water channel, and the other ends of the two groups of cooling water pipes are both located on the right side of the casing, a shaft is inserted through the center of the inner cavity of the casing, a rotor is sleeved on the center of the outer wall of the shaft, a stator is sleeved on the outer wall of the rotor, the rotor and the stator are both located in the center of the inner cavity of the casing, and the two groups of cooling water pipes are respectively inserted through the inner cavity of the casing. The top and bottom of the iron core passing through the stator, the top and bottom of the left and right sides of the stator are provided with fixing rings, the fixing rings are welded to the inner wall of the casing, the cooling water pipes are inserted into the inner cavity of the fixing rings, the top and bottom of the left and right sides of the stator are fixed with windings by bolts, the top and bottom of the left and right sides of the rotor are fixed with rotor fans by bolts, the right end of the casing is clamped with an end cover, the inner side of the end cover is respectively connected to the two groups of cooling water pipes and the left end of the shaft, the bottom of the inner wall of the casing is filled with cooling oil, and the cooling oil submerges the top of the rotor fan at the bottom.

[0005] Preferably, a connecting groove is opened through the water channel on the left side of the shell of the casing, the outer wall of the cooling water pipe is plugged into the inner cavity of the connecting groove and extends to the left side of the inner cavity of the water channel, and sealant is filled between the connecting groove and the relative inner sides of the cooling water pipe.

[0006] Preferably, the punching part of the stator is fixed by the cooling water pipe and the fixing ring.

[0007] Preferably, a sealing ring is inserted between the right inner wall of the end cover and the left outer wall of the casing.

[0008] Preferably, the right end of the cooling water pipe at the top is the water inlet, and the right end of the cooling water pipe at the bottom is the water outlet.

[0009] Preferably, valves are provided at both the water inlet and the water outlet.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention fixes the end portion of the stator by interference fitting the fixing ring and the cooling water pipe, and no welding or bolting is required on the outside of the stator, thereby simplifying the production process and reducing the production cost and the cost of parts; the stator is first directly cooled by the cooling water pipe, and then cooled again by the water channel in the casing, thereby achieving a double cooling effect; the cooling oil splashes as the rotor fan installed on the rotor rotates, quickly transferring the heat on the winding to the cooling water pipe and the casing, thereby achieving a fast, double cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0014] 1- housing, 2- fixing ring, 3- cooling water pipe, 4- stator, 5- rotor, 6- shaft, 7- winding, 8- end cover, 9- rotor fan, 10- cooling oil. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0016] See also Figure 1 The present invention provides a technical solution: a dual-cooling motor structure, including a casing 1, the top and bottom of the casing 1 are respectively penetrated and plugged with cooling water pipes 3, the shell of the casing 1 is provided with a water channel, one end of the two sets of cooling water pipes 3 are connected to the inner cavity of the water channel, the other ends of the two sets of cooling water pipes 3 are both located on the right side of the casing 1, the center of the inner cavity of the casing 1 is penetrated and plugged with a shaft 6, the center of the outer wall of the shaft 6 is sleeved with a rotor 5, the outer wall of the rotor 5 is sleeved with a stator 4, the rotor 5 and the stator 4 are both located in the center of the inner cavity of the casing 1, and the two sets of cooling water pipes 3 are respectively penetrated and plugged with the inner cavity of the water channel. The top and bottom of the iron core of the stator 4, the top and bottom of the left and right sides of the stator 4 are provided with a fixing ring 2, the fixing ring 2 is welded to the inner wall of the casing 1, and the cooling water pipe 3 is plugged into the inner cavity of the fixing ring 2. The top and bottom of the left and right sides of the stator 4 are fixed with windings 7 by bolts, and the top and bottom of the left and right sides of the rotor 5 are fixed with rotor fans 9 by bolts. The right end of the casing 1 is clamped with an end cover 8, and the inner side of the end cover 8 is respectively connected to the two groups of cooling water pipes 3 and the left end of the shaft 6. The bottom of the inner wall of the casing 1 is filled with cooling oil 10, and the cooling oil 10 submerges the top of the bottom rotor fan 9.

[0017] Among them, a connecting groove is opened on the left side of the shell of the casing 1 and passes through the water channel. The outer wall of the cooling water pipe 3 is inserted into the inner cavity of the connecting groove and extends to the left side of the inner cavity of the water channel. The connecting groove and the relative inner side of the cooling water pipe 3 are filled with sealant.

[0018] The punching part of the stator 4 is fixed by the cooling water pipe 3 and the fixing ring 2.

[0019] A sealing ring is inserted between the right inner wall of the end cover 8 and the left outer wall of the casing 1 .

[0020] The right end of the top cooling water pipe 3 is the water inlet, and the right end of the bottom cooling water pipe 3 is the water outlet.

[0021] Valves are provided at the water inlet and outlet.

[0022] A specific application of this embodiment is: cooling water is connected to the water channel through the top cooling water pipe 3, so that cooling water is injected into the water channel, which has a dual cooling method for the motor when the vehicle is frequently started. When the rotor 5 rotates normally, the rotor fan 9 installed on the rotor 5 will also drive the cooling oil 10 to splash, and transfer the heat on the winding 7 of the stator 4 to the cooling water pipe 3 and the casing 1 through the cooling oil 10, and the heat is quickly taken away by the cooling water in the water channel of the cooling water pipe 3 and the casing 1. The higher the speed of the motor, the better the cooling effect of the splashing cooling oil 10, which is suitable for use when the vehicle is running at high speed.

[0023] The casing 1 and the stator 4 still adopt the traditional shrink-fit interference installation method. One end of the cooling water pipe 3 is connected to the internal water channel of the casing 1, and the other end leads to the outside. The cooling water pipe 3 and the stator 4 are also interference installed and directly inserted into the interior of the stator 4 core. After installation, the end part of the stator 4 is fixed by interference press fitting the fixing ring 2 and the cooling water pipe 3. There is no need to weld or bolt the outside of the stator 4, which simplifies the production process and reduces the production cost and the cost of parts.

[0024] When the motor is working, the cooling water first enters the cooling water pipe 3 to directly cool the stator 4, and then cools the stator 4 again through the casing 1, achieving a dual cooling effect of direct cooling and indirect cooling. Under the same motor structure, the motor can run at a lower operating temperature, thereby increasing the motor's service life and improving the motor's working environment.

[0025] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0026] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dual-cooling motor structure, comprising a housing (1), characterized in that: The top and bottom of the housing (1) are respectively penetrated and plugged with cooling water pipes (3); a water channel is opened on the shell of the housing (1); one end of the two groups of cooling water pipes (3) are communicated with the inner cavity of the water channel; the other ends of the two groups of cooling water pipes (3) are both located on the right side of the housing (1); a shaft (6) is inserted and inserted horizontally through the center of the inner cavity of the housing (1); a rotor (5) is sleeved on the center of the outer wall of the shaft (6); a stator (4) is sleeved on the outer wall of the rotor (5); the rotor (5) and the stator (4) are both located in the center of the inner cavity of the housing (1); the two groups of cooling water pipes (3) respectively penetrate the top and bottom of the iron core of the stator (4) horizontally; the stator (4) ) are provided with fixing rings (2) on the top and bottom of the left and right sides, the fixing rings (2) are welded to the inner wall of the casing (1), the cooling water pipes (3) are plugged into the inner cavity of the fixing rings (2), the windings (7) are fixed to the top and bottom of the left and right sides of the stator (4) by bolts, the rotor fans (9) are fixed to the top and bottom of the left and right sides of the rotor (5) by bolts, the end cover (8) is clamped at the right end of the casing (1), the inner side of the end cover (8) is respectively connected to the two groups of cooling water pipes (3) and the left end of the shaft (6), the bottom of the inner wall of the casing (1) is filled with cooling oil (10), and the cooling oil (10) submerges the top of the rotor fan (9) at the bottom; A connecting groove is provided on the left side of the shell of the housing (1) through the water channel, the outer wall of the cooling water pipe (3) is plugged into the inner cavity of the connecting groove and extends to the left side of the inner cavity of the water channel, and a sealant is filled between the connecting groove and the opposite inner sides of the cooling water pipe (3); The punching portion of the stator (4) is fixed by the cooling water pipe (3) and the fixing ring (2); The right end of the cooling water pipe (3) at the top is a water inlet, and the right end of the cooling water pipe (3) at the bottom is a water outlet.

2. The dual-cooling motor structure according to claim 1, characterized in that: A sealing ring is inserted between the right inner wall of the end cover (8) and the left outer wall of the casing (1).

3. The dual-cooling motor structure according to claim 1, characterized in that: Valves are provided at the water inlet and the water outlet.

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