High-efficiency heat dissipation structure of motor

Abstract

The invention discloses a high-efficiency heat dissipation structure of a motor. The high-efficiency heat dissipation structure of the motor comprises a shell, an end cover, a stator winding, a stator core and a slot wedge, the casing, the end cover, the stator core and the slot wedge are mutually matched, sealed and clamped, the stator winding is arranged on the stator core, a central cooling path is arranged between the stator winding and the stator core to allow cooling fluid to circulate, and a plurality of tooth side paths are arranged on the stator core to allow the cooling fluid to circulate. The slot wedge is provided with a plurality of slot wedge paths for circulation of cooling fluid. According to the motor heat dissipation structure, the contact area between the cooling medium and the stator winding is further increased through a plurality of cooling paths of the tooth sides and the slot wedges arranged around the stator winding, and the heat dissipation capability of the motor is improved. Due to the shell, the end cover, the stator core and the slot wedge which are mutually clamped and sealed, the motor does not need to be sealed by installing an oil separation sleeve in an air gap like a traditional motor in the sealing process, the structure of the motor is simplified, and improvement of the performance of the motor is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more specifically, to a high-efficiency heat dissipation structure of a motor. Background Art

[0002] The heat dissipation capacity of the motor is one of the key factors that limit its power density. During the operation of the motor, the winding is the main heat source. Since the winding is located in the stator slot and is wrapped with an insulation layer with poor thermal conductivity, it is easy for the winding temperature to be too high during the use of the motor. If the heat dissipation is not reasonable, the winding insulation layer may be damaged, causing the winding to short-circuit, and even burn the motor in severe cases.

[0003] At present, the direct cooling structure of oil-cooled motors usually sets a cooling channel in the center of the double-layer winding, but this design makes the contact area between the winding and the coolant small, resulting in low heat dissipation efficiency. In addition, the traditional sealing structure is usually achieved by installing an oil-isolating sleeve in the air gap, which requires a large air gap length, which is not conducive to the design of high power density of the motor. At the same time, the traditional sealing structure usually requires the introduction of a new structure, which undoubtedly further increases the complexity of the system.

[0004] Therefore, there is an urgent need for an efficient heat dissipation structure for a motor that can both increase the contact area between the motor winding and the cooling fluid and simplify the sealing structure of the motor. Summary of the invention

[0005] The purpose of the present invention is to provide a motor efficient heat dissipation structure. The motor efficient heat dissipation structure provided by the present invention effectively increases the contact area between the cooling fluid and the motor winding, improves the heat dissipation capacity of the motor, simplifies the sealing structure of the motor, and improves the operating conditions of the motor.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A motor high-efficiency heat dissipation structure, the motor high-efficiency heat dissipation structure comprises: a housing, an end cover, a stator winding, a stator core and a slot wedge;

[0008] The casing, end cover, stator core and slot wedge are sealed and clamped with each other, the stator winding is arranged on the stator core, a central cooling path is arranged between the stator winding and the stator core for the circulation of cooling fluid, a plurality of tooth side paths are arranged on the stator core for the circulation of cooling fluid, and a plurality of slot wedge paths are arranged on the slot wedge for the circulation of cooling fluid.

[0009] Preferably, the stator core comprises: stator teeth and a yoke;

[0010] The stator tooth support is clamped to the stator winding, the slot wedge is sealed and clamped between adjacent stator teeth, the yoke and the stator teeth are sealed and clamped to each other, and the stator teeth, yoke and slot wedge are clamped to each other to form a sealing structure in the stator core;

[0011] A plurality of auxiliary heat dissipation teeth are evenly arranged on opposite sides of the stator teeth, the tooth side path is formed between adjacent auxiliary heat dissipation teeth, the central cooling path is arranged between the yoke and the stator winding, and the slot wedge path is arranged between the slot wedge and the stator winding.

[0012] Preferably, a choke tooth is provided on one side of the yoke that is engaged with the stator tooth, and a gap exists between the choke tooth and the stator winding to form the central cooling path.

[0013] Preferably, the stator teeth and the auxiliary heat dissipation teeth are integrally formed, and the yoke and the choke teeth are integrally formed.

[0014] Preferably, a drainage groove is provided on the slot wedge, and the slot wedge path is formed between the drainage groove and the stator winding for the circulation of cooling fluid.

[0015] Preferably, a cooling groove is provided in the middle of the stator teeth to increase the contact area between the cooling fluid and the stator winding.

[0016] Preferably, the stator winding is mounted on the stator teeth and the stator winding extends toward and out of both ends of the stator teeth.

[0017] Preferably, the end cover includes a front end cover and a rear end cover, the outer rings of the front and rear end covers are snap-fitted and sealed with the casing, the inner rings are snap-fitted and sealed with the stator core and the slot wedges, and the front end cover and the rear end cover are both provided with through holes for the cooling fluid to flow in, and the through holes can be sealed.

[0018] Preferably, the housing is provided with a liquid outlet, and the liquid outlet is sealable.

[0019] The beneficial effects of the present invention are:

[0020] The motor high-efficiency heat dissipation structure further increases the contact area between the cooling medium and the stator winding by setting multiple cooling paths between the stator core and the stator winding, and between the slot wedge and the stator winding, thereby improving the heat dissipation capacity of the motor. In addition, the motor high-efficiency heat dissipation structure utilizes the existing end covers, housings, stator teeth and slot wedges in the structure to form a sealing structure, and does not require the provision of an additional oil-isolating sleeve, so there is no need to reserve additional space in the air gap, which further simplifies the motor structure and is conducive to improving the motor performance.

[0021] Among them, the auxiliary heat dissipation teeth arranged on the stator teeth form multiple tooth side paths on the stator teeth. The setting of the tooth side paths greatly increases the contact area between the cooling medium and the side of the stator winding, and significantly improves the heat dissipation capacity of the stator winding. The drainage grooves opened on the slot wedges form multiple slot wedge paths at the contact position between the stator winding and the slot wedges, increasing the contact area between the cooling medium and the end of the stator winding, and avoiding the temperature of the end of the stator winding from being too high. The flow-blocking teeth arranged on the yoke can reduce the cooling medium flowing through the central cooling path, further adjust the flow of the cooling medium flowing through the central cooling path, the tooth side path, and the slot wedge path, and improve the heat dissipation capacity of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the motor high-efficiency heat dissipation structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the stator structure of the motor high-efficiency heat dissipation structure of the present invention;

[0024] Figure 3 It is a cross-sectional schematic diagram of the motor high-efficiency heat dissipation structure in the present invention;

[0025] Figure 4 It is a cross-sectional schematic diagram of the clamping seal of the motor high-efficiency heat dissipation structure in the present invention;

[0026] Figure 5 Schematic diagram of the slot wedge structure of the motor high-efficiency heat dissipation structure in the present invention;

[0027] Figure 6 It is a schematic diagram of the stator tooth structure of the motor's efficient heat dissipation structure in the present invention.

[0028] Description of reference numerals:

[0029] 1. Front cover; 2. Casing; 3. Slot wedge; 4. Stator winding; 5. Stator teeth; 6. Yoke; 7. Rear cover;

[0030] 101, center cooling path; 102, tooth side path; 103, slot wedge path;

[0031] 201, flow-blocking teeth; 202, auxiliary heat dissipation teeth. DETAILED DESCRIPTION

[0032] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0035] like Figure 1 As shown, a motor high-efficiency heat dissipation structure comprises: a casing 2, an end cover, a stator winding 4, a stator core and a slot wedge 3; the casing 2, the end cover, the stator core and the slot wedge 3 cooperate with each other to seal and clamp, the stator winding 4 is arranged on the stator core, a central cooling path 101 is arranged between the stator winding 4 and the stator core for circulation of cooling fluid, a plurality of tooth side paths 102 are arranged on the stator core for circulation of cooling fluid, and a plurality of slot wedge paths 103 are arranged on the slot wedge 3 for circulation of cooling fluid.

[0036] In this embodiment, the heat dissipation structure of the motor further increases the contact area between the cooling medium and the stator winding 4 by setting multiple cooling paths between the stator core and the stator winding 4, and the setting of multiple cooling paths further increases the flow rate of the cooling medium, thereby improving the heat dissipation capacity of the motor. The housing 2, end cover, stator core and slot wedge 3 that are mutually clamped and sealed make it unnecessary to install an oil-isolating sleeve in the air gap to achieve sealing as in traditional motors. The housing 2, end cover, stator core and slot wedge 3 that are mutually clamped and sealed simplify the structure of the motor, reduce the size of the motor, and help improve the power density of the motor. During use of the motor, the cooling medium is injected from the end covers at both ends of the motor, flows through the stator core and stator winding 4 in the motor, and then flows out at the middle position of the motor.

[0037] See also Figure 2 and Figure 3The stator core includes stator teeth 5 and a yoke 6; the stator teeth 5 support and clamp the stator winding 4, the slot wedges 3 are clamped between adjacent stator teeth 5, the yoke 6 and the stator teeth 5 are clamped with each other, and the stator teeth 5, the yoke 6 and the slot wedges 3 are clamped with each other to form a sealing structure in the stator core; a plurality of auxiliary heat dissipation teeth 202 are evenly arranged on the opposite sides of the stator teeth 5, and tooth side paths 102 are formed between adjacent auxiliary heat dissipation teeth 202, a central cooling path 101 is arranged between the yoke 6 and the stator winding 4, and a slot wedge path 103 is arranged between the slot wedge 3 and the stator winding 4.

[0038] In this embodiment, the stator core is sealed and clamped to one end of the stator tooth 5 through the yoke 6, and the slot wedge 3 is sealed and clamped to the other end of the stator tooth 5, so as to achieve the sealing of the stator core in the motor, and form a sealed cavity inside the stator core to prevent the cooling fluid from flowing into the air gap, thereby ensuring the normal operation of the rotor. The auxiliary heat dissipation teeth 202 evenly spaced on the stator teeth 5 further form tooth side paths 102 on the stator teeth 5 for the cooling medium to flow through. The setting of the tooth side paths 102 effectively increases the contact area between the cooling medium and the stator winding 4, and the setting of multiple tooth side paths 102 effectively improves the flow rate and flow rate of the cooling fluid flowing through, further improving the cooling efficiency of the motor and avoiding winding damage caused by excessive temperature in the motor.

[0039] like Figure 3-Figure 5 As shown, a choke tooth 201 is provided on one side of the yoke 6 that is engaged with the stator tooth 5, and a gap exists between the choke tooth 201 and the stator winding 4 to form a central cooling path 101. A diversion groove is provided on the slot wedge 3, and a slot wedge path 103 is formed between the diversion groove and the stator winding 4 for the cooling fluid to flow.

[0040] In this embodiment, a baffle tooth 201 is provided on one side of the yoke 6. The provision of the baffle tooth 201 enables the stator core to adjust the flow rate and flow velocity of the cooling medium in the central cooling path 101, the tooth side path 102 and the slot wedge path 103, further improving the heat dissipation effect of the motor. In addition, the provision of the baffle tooth 201 further increases the contact area between the cooling medium and the stator teeth 5, and the cooling medium and the yoke 6, thereby improving the cooling and heat dissipation efficiency of the unit cooling medium. A plurality of drainage grooves are provided on the side of the slot wedge 3 close to the stator winding 4, which enables the cooling medium to directly contact the stator winding 4 through the slot wedge path 103 formed by the drainage grooves, thereby increasing the contact area between the stator winding 4 and the cooling medium, further improving the heat dissipation effect of the stator winding 4, and effectively preventing the stator winding 4 from overheating during use.

[0041] See also Figure 6In a preferred embodiment, a cooling groove is provided in the middle of the stator tooth 5 to increase the contact area between the cooling fluid and the stator winding 4. In this embodiment, the provision of the cooling groove makes it possible to have no auxiliary heat dissipation teeth 202 in the middle part of the stator tooth 5, thereby further increasing the contact area between the cooling medium and the stator winding 4, and the provision of the cooling groove allows more cooling medium to pass through the middle part of the stator tooth 5 per unit time, thereby increasing the flow rate of the cooling medium and further improving the cooling effect of the motor.

[0042] In a preferred embodiment, the stator teeth 5 and the auxiliary heat dissipation teeth 202 are integrally formed, the yoke 6 and the blocking teeth 201 are integrally formed, and after the stator winding 4 is arranged on the stator teeth 5, the two ends of the stator winding 4 extend outward from the stator slot. The integrally formed stator teeth 5 and the auxiliary heat dissipation teeth 202 not only avoid the need for additional brackets during the installation of the stator core, but also further improve the stability of the auxiliary heat dissipation teeth 202 and ensure the safety of the heat dissipation structure. In addition, the parts of the two ends of the stator winding 4 extending outward from the stator slot can further increase the contact area between the stator winding 4 and the cooling medium, thereby improving the heat dissipation capacity of the stator winding 4.

[0043] like Figure 1 As shown, in one embodiment, the end cover includes a front cover 1 and a rear cover 7, the outer sides of the front cover 1 and the rear cover 7 are both snap-fitted and sealed with the housing 2, the inner sides of the front cover 1 and the rear cover 7 are both snap-fitted and sealed with the stator core, and the front cover 1 and the rear cover 7 are both provided with through holes for the circulation of cooling fluid, and the through holes can be sealed. A sealed liquid outlet hole is provided in the middle position of the housing 2, and the liquid outlet hole can be sealed. The liquid outlet hole includes a connecting bolt and a sealing ring, the sealing ring is provided at the liquid outlet hole, and the connecting bolt is sealed and connected to the liquid outlet hole through the sealing ring.

[0044] In a preferred embodiment, when the motor is working, the cooling medium is injected into the motor through the front cover 1 and the rear cover 7 of the motor. After entering the motor, the cooling medium contacts the end of the stator winding 4 extending out of the stator slot, takes away the heat from the end of the stator winding 4, and then flows through the central cooling path 101, the tooth side path 102, and the slot wedge path 103 after passing through the stator winding 4, and then converges in the middle of the stator core, and then flows out through the liquid outlet hole at the casing 2. The cooling medium contacts the stator teeth 5 and the stator winding 4 through the tooth side path 102, and takes away the heat from the stator teeth 5 and the stator winding 4; the cooling medium contacts the sides of the two adjacent layers of stator winding 4 through the central cooling path 101, and takes away the heat from the sides of the stator winding 4. In addition, the flow rate of the cooling medium through the central cooling path 101 is reduced by the setting of the baffle teeth 201, and the cooling fluid flowing through the tooth side path 102 and the slot wedge path 103 is increased, thereby further improving the cooling effect of the motor heat dissipation structure; the cooling medium contacts the slot wedge 3 and the end of the stator winding 4 through the slot wedge path 103, and takes away the heat of the stator winding 4 on one side of the slot wedge 3.

[0045] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A motor efficient heat dissipation structure, characterized in that: The motor high-efficiency heat dissipation structure comprises: a housing, an end cover, a stator winding, a stator core and a slot wedge; The casing, end cover, stator core and slot wedge are sealed and clamped with each other, the stator winding is arranged on the stator core, a central cooling path is arranged between the stator winding and the stator core for the circulation of cooling fluid, a plurality of tooth side paths are arranged on the stator core for the circulation of cooling fluid, and a plurality of slot wedge paths are arranged on the slot wedge for the circulation of cooling fluid.

2. The motor efficient heat dissipation structure according to claim 1, characterized in that: The stator core comprises: stator teeth and a yoke; The stator tooth support is clamped to the stator winding, the slot wedge is sealed and clamped between adjacent stator teeth, the yoke and the stator teeth are sealed and clamped to each other, and the stator teeth, yoke and slot wedge are clamped to each other to form a sealing structure in the stator core; A plurality of auxiliary heat dissipation teeth are evenly arranged on opposite sides of the stator teeth, the tooth side path is formed between adjacent auxiliary heat dissipation teeth, the central cooling path is arranged between the yoke and the stator winding, and the slot wedge path is arranged between the slot wedge and the stator winding.

3. The motor efficient heat dissipation structure according to claim 2 is characterized in that: A choke tooth is provided on one side of the yoke that is engaged with the stator tooth, and a gap is provided between the choke tooth and the stator winding to form the central cooling path.

4. The motor efficient heat dissipation structure according to claim 3 is characterized in that: The stator teeth and the auxiliary heat dissipation teeth are integrally formed, and the yoke and the choke teeth are integrally formed.

5. The motor efficient heat dissipation structure according to claim 1, characterized in that: The slot wedge is provided with a drainage groove, and the slot wedge path is formed between the drainage groove and the stator winding for the circulation of cooling fluid.

6. The motor efficient heat dissipation structure according to claim 2, characterized in that: A cooling groove is provided in the middle of the stator teeth to increase the contact area between the cooling fluid and the stator winding.

7. The motor efficient heat dissipation structure according to claim 2, characterized in that: The stator winding is installed on the stator teeth and extends toward two ends of the stator teeth and out of two ends of the stator teeth.

8. The motor efficient heat dissipation structure according to any one of claims 1 to 7, characterized in that: The end cover includes a front end cover and a rear end cover, the outer rings of the front and rear end covers are snap-fitted and sealed with the casing, and the inner rings are snap-fitted and sealed with the stator core and the slot wedges. The front end cover and the rear end cover are both provided with through holes for the cooling fluid to flow in, and the through holes can be sealed.

9. The motor efficient heat dissipation structure according to any one of claims 1 to 7, characterized in that: The housing is provided with a liquid outlet hole, and the liquid outlet hole can be sealed.

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