Motor with cooling heat dissipation structure

Abstract

The utility model provides a motor possessing a cooling heat dissipation structure, comprising a casing assembly, a motor shaft assembly and a stator, the casing assembly comprises a housing, an inner cylinder and a left end cover, the inner surface of the housing is provided with a spiral cooling liquid flow channel, the inner cylinder is tightly attached to the inner surface of the housing so that the spiral cooling liquid flow channel is sealed, and the motor shaft assembly is provided with a cooling liquid outlet. A cooling liquid inlet and a cooling liquid outlet which are communicated with the spiral cooling liquid flow channel are formed in the shell; the motor shaft assembly comprises a main shaft, a main shaft end seal, a connecting end and a connecting end outer clamping ring, a cooling liquid channel in the axial direction is formed in the main shaft, the main shaft end seal is fixedly connected to the left end of the main shaft and seals the cooling liquid channel, the two ends of the connecting end are in a frustum shape with the small outer portion and the large inner portion, and a first mounting groove matched with one end of the connecting end is formed in the right end of the main shaft. A second mounting groove matched with the other end of the connecting end is formed in the connecting end outer clamping ring, the connecting end outer clamping ring is in threaded connection with the main shaft, and a circle of clamping strips in the radial direction are arranged on the inner ring of the connecting end.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a motor with a cooling and heat dissipation structure. Background Art

[0002] During the actual operation of the motor, when it is at low speed and high torque, the stator and rotor of the motor will generate a lot of heat. The heat dissipation method of the motor is mostly to open a spiral water flow channel inside the motor housing, and the water circulates in the housing to achieve the cooling effect of the motor. This cooling method has the problem that the motor stator winding (coil) and rotor cannot be directly cooled, and the main heat source of the motor cannot be effectively cooled. Therefore, the thermal load of the motor is limited, which in turn leads to the limitation of the motor volume. Utility Model Content

[0003] The utility model aims to solve the above technical problems and provides a motor with a cooling and heat dissipation structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A motor with a cooling and heat dissipation structure comprises a casing assembly, a motor shaft assembly and a stator, the casing assembly comprises an outer shell, an inner cylinder and a left end cover, the upper end of the left end cover is provided with a coolant inlet, the inner surface of the outer shell is provided with a spiral coolant flow channel, the inner cylinder is tightly attached to the inner surface of the outer shell so that the spiral coolant flow channel is closed, and the outer shell is provided with a coolant inlet and a coolant outlet connected to the spiral coolant flow channel; the motor shaft assembly comprises a main shaft, a main shaft end seal, a connecting end head, and an outer retaining ring of the connecting end head, a coolant channel along the axial direction is provided in the main shaft, the main shaft end seal is fixedly connected to the left end of the main shaft and closes the coolant channel, the two ends of the connecting end head are in a frustum shape with a small outside and a large inside, the right end of the main shaft is provided with a first mounting groove matched with one end of the connecting end head, the outer retaining ring of the connecting end head is provided with a second mounting groove matched with the other end of the connecting end head, the outer retaining ring of the connecting end head is threadedly connected to the main shaft, and the inner ring of the connecting end head is provided with a circle of radial clamping strips.

[0006] As a preferred technical solution, the casing assembly also includes a left end cover, a right end cover, a left end seal, and a right end seal. The left end cover and the left end seal are fixedly connected to the left end of the outer shell, and the right end cover and the right end seal are fixedly connected to the right end of the outer shell. The left end seal and the right end seal are respectively rotatably sealed and connected to the motor shaft assembly and are mutually interlocked with the motor shaft assembly.

[0007] As a preferred technical solution, the housing is provided with first sealing ring installation grooves on both sides of the spiral coolant flow channel, and the first sealing ring is installed in the first sealing ring installation groove.

[0008] As a preferred technical solution, second sealing ring installation grooves are respectively provided on the sealing surfaces of the left end seal and the motor shaft assembly, and on the sealing surfaces of the right end seal and the motor shaft assembly, and a second sealing ring is installed in the second sealing ring installation grooves.

[0009] After adopting the above technical solution, the utility model has the following advantages:

[0010] The utility model discloses a motor with a cooling and heat dissipation structure, wherein a spiral coolant flow channel is designed inside a casing. When the coolant circulates in the spiral coolant flow channel under a certain pressure, on the one hand, due to the existence of the spiral coolant flow channel, the coolant is forced to circulate in a large area in the casing along the spiral coolant flow channel, thereby promoting the formation of turbulence and utilizing the cooling medium to bring out the heat with maximum efficiency. On the other hand, both sides of the spiral coolant flow channel in the casing can be regarded as a form of heat dissipation ribs, and the outer shell strength of the motor can be enhanced. The utility model discloses a motor with a cooling and heat dissipation structure, wherein a coolant channel is arranged inside a main shaft of the motor, and the heat transferred by the main shaft can be discharged through the coolant in the coolant channel, so that the rotor, the main heat generating element of the motor, is effectively cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a motor with a cooling and heat dissipation structure;

[0012] Figure 2 A cross-sectional view of a motor having a cooling and heat dissipation structure;

[0013] Figure 3 is a cross-sectional view of the housing;

[0014] Figure 4 This is a schematic diagram of the structure of a motor with a cooling and heat dissipation structure from an upward perspective. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1-4 As shown, a motor with a cooling and heat dissipation structure includes: a housing assembly, a motor shaft assembly and a stator 7.

[0017] The housing assembly includes an outer shell 1, an inner cylinder 2, a left end cover 3, a right end cover 4, a left end seal 5, and a right end seal 6. The outer shell 1 and the inner cylinder 2 are both cylindrical. The left end cover 3 is fixedly mounted on the left end of the outer shell 1, and the right end cover 4 is fixedly mounted on the right end of the outer shell 1. A coolant inlet 301 is provided at the upper end of the left end cover 3. The coolant flows into the interior of the motor from the coolant inlet 301, which plays a role in cooling the stator 7 and the rotor 12.

[0018] The inner surface of the outer shell 1 is provided with a spiral coolant flow channel 101. The inner cylinder 2 is cylindrical, and the inner cylinder 2 is tightly attached to the inner surface of the outer shell 1 so that the spiral coolant flow channel 101 is closed. The outer shell 1 is provided with a coolant inlet 102 and a coolant outlet 103 connected to the spiral coolant flow channel 101. The stator 7 is fixedly installed in the housing assembly. When the stator 7 is installed, the inner cylinder 2 is abutted and fixed on the outer shell 1 through radial interference fit.

[0019] The housing 1 is provided with first sealing ring installation grooves on both sides of the spiral coolant flow channel 101 , and first sealing rings 15 are installed in the first sealing ring installation grooves.

[0020] The motor shaft assembly includes a main shaft 8 , a main shaft end seal 9 , a connecting end 10 , a connecting end outer retaining ring 11 and a rotor 12 .

[0021] The rotor 12 is fixedly mounted on the main shaft 8. A coolant channel 801 is provided in the main shaft 8 along the axial direction. The main shaft end seal 9 is fixedly connected to the left end of the main shaft 8 and seals the coolant channel 801.

[0022] The two ends of the connection terminal 10 are in the shape of a cone with a small outside and a large inside. The right end of the main shaft 8 is provided with a first mounting groove matched with one end of the connection terminal 10, and the outer clamping ring 11 of the connection terminal is provided with a second mounting groove matched with the other end of the connection terminal 10. The outer clamping ring 11 of the connection terminal is threadedly connected to the main shaft 8, and the inner ring of the connection terminal 10 is provided with a circle of radial clamping strips 1001. During the tightening process of the outer clamping ring 11 of the connection terminal, the second mounting groove on the outer clamping ring 11 of the connection terminal squeezes the connection terminal 10, so that the clamping strips 1001 of the inner ring of the connection terminal 10 are deformed inwardly and the spacing between each clamping strip 1001 is reduced, so as to have an interference fit with another connection terminal outside.

[0023] The external connection terminal is connected to the connection terminal 10 on the motor, and the external coolant is input into the coolant channel 801 in the main shaft 8. The coolant can flow in and out autonomously during the rotation of the main shaft 8. The heat transferred by the main shaft 8 can be discharged through the coolant in the coolant channel 801, so that the rotor 12, the main heat generating element of the motor, is effectively cooled.

[0024] The main shaft 8 and the housing 1 are rotatably connected via a pair of bearings 13 .

[0025] The left end seal 5 is fixedly mounted on the left end of the left end cover 4, and the left end seal 5 is sleeved outside the main shaft end seal 9. The left end seal 5 and the main shaft end seal 9 are mutually interlocked in the axial direction of the main shaft 8, and the left end seal 5 and the main shaft end seal 9 are rotationally sealed and connected. The main shaft end seal 9 is provided with a second sealing ring installation groove on the sealing surface with the left end seal 5, and a second sealing ring 14 is installed in the second sealing ring installation groove. The right end seal 6 is fixedly mounted between the right end cover 4 and the casing 1, and a sealing portion is provided on the main shaft 8, which is mutually interlocked with the right end seal 6 in the axial direction of the main shaft 8, and a second sealing ring installation groove is provided on the front surface of the sealing portion with the right end seal 6, and a second sealing ring 14 is installed in the second sealing ring installation groove.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A motor with a cooling and heat dissipation structure, comprising a housing assembly, a motor shaft assembly and a stator, characterized in that: The casing assembly comprises an outer shell, an inner cylinder and a left end cover, the inner surface of the outer shell is provided with a spiral coolant flow channel, the inner cylinder is tightly attached to the inner surface of the outer shell so that the spiral coolant flow channel is closed, and the outer shell is provided with a coolant inlet and a coolant outlet connected to the spiral coolant flow channel; the motor shaft assembly comprises a main shaft, a main shaft end seal, a connecting end, and an outer retaining ring of the connecting end, a coolant channel along the axial direction is provided in the main shaft, the main shaft end seal is fixedly connected to the left end of the main shaft and closes the coolant channel, the two ends of the connecting end are in a frustum shape with a small outside and a large inside, the right end of the main shaft is provided with a first mounting groove matching with one end of the connecting end, the outer retaining ring of the connecting end is provided with a second mounting groove matching with the other end of the connecting end, the outer retaining ring of the connecting end is threadedly connected to the main shaft, and the inner ring of the connecting end is provided with a circle of radial clamping strips.

2. The motor with a cooling and heat dissipation structure according to claim 1, characterized in that: The casing assembly also includes a left end cover, a right end cover, a left end seal, and a right end seal. The left end cover and the left end seal are fixedly connected to the left end of the outer shell, and the right end cover and the right end seal are fixedly connected to the right end of the outer shell. The left end seal and the right end seal are respectively rotatably sealed and mutually engaged with the motor shaft assembly.

3. The motor with a cooling and heat dissipation structure according to claim 1, characterized in that: The shell is provided with first sealing ring installation grooves on both sides of the spiral coolant flow channel, and the first sealing ring is installed in the first sealing ring installation groove.

4. The motor with a cooling and heat dissipation structure according to claim 2, characterized in that: Second sealing ring installation grooves are respectively provided on the sealing surfaces of the left end seal and the motor shaft assembly, and on the sealing surfaces of the right end seal and the motor shaft assembly, and a second sealing ring is installed in the second sealing ring installation groove.

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