Water-cooling heat dissipation type permanent magnet synchronous motor

Abstract

A water-cooling heat dissipation type permanent magnet synchronous motor disclosed by the present invention comprises a motor shell, an internal interlayer of the motor shell is provided with a circulation replacement mechanism and a water cooling pipe, the circulation replacement mechanism comprises a circulation replacement box, and an internal interlayer of the circulation replacement box is provided with a rotatable rotating box. A recycling cavity and a circulating cavity are formed in an interlayer of the rotating box, and meanwhile a positioning structure used for limiting rotation of the rotating box is arranged. Overheated cooling liquid enters the recycling cavity, then low-temperature cooling liquid located in the circulating cavity enters the water cooling pipe, after cold and hot replacement is completed, the floating ball located in the recycling cavity floats upwards, the floating ball located in the circulating cavity falls down, the extrusion assembly is driven to be away from the braking assembly, and the gravity center enables the cooling liquid to press the rotating box to rotate; the recovery cavity is located at the bottom of the motor to wait for natural cooling, two cooling liquids are circularly used, the situation that heat in the motor cannot be taken away due to too high temperature is avoided, the heat dissipation efficiency of the motor is improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of permanent magnet synchronous motors, and in particular relates to a water-cooled permanent magnet synchronous motor. Background Art

[0002] At present, the commonly used motors are brushless DC motors, permanent magnet synchronous motors, squirrel cage asynchronous motors, and switched reluctance motors. Permanent magnet synchronous motors have high power density, high power factor, high efficiency, large starting torque, and low noise. They are widely used in coal mines, new energy vehicles, generators, air conditioners, vacuum pumps, and coal mining machine cutting parts.

[0003] During long-term operation, the motor will generate a lot of heat. At the same time, the coolant that plays a cooling role will gradually heat up over time, thus affecting the heat dissipation efficiency of the motor. The motor cannot be cooled quickly, resulting in an increase in motor temperature. The magnetic steel inside the rotor is at risk of demagnetization at high temperatures, which in turn affects its efficiency, reliability and service life. Summary of the invention

[0004] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0005] A water-cooled permanent magnet synchronous motor comprises a motor housing, wherein the inner interlayer of the motor housing is provided with a circulation replacement mechanism and a water cooling pipe, wherein the circulation replacement mechanism comprises a circulation replacement box, wherein the inner interlayer of the circulation replacement box is provided with a rotatable rotating box, wherein the interlayer of the rotating box is provided with a recovery chamber and a circulation chamber, and a positioning structure for limiting its own rotation is provided, wherein the recovery chamber and the circulation chamber are respectively connected with the water inlet end and the water discharge end of the water cooling pipe;

[0006] The positioning structure includes a guide column fixed between the interlayers of the rotating box, a brake assembly is arranged inside the guide column, the brake assembly penetrates the rotating box and contacts the circulating replacement box, a floating ball is arranged on the outer ring movable sleeve of the guide column, an extrusion assembly matched with the brake assembly is arranged inside the floating ball, and the two guide columns are respectively located in the recovery chamber and the circulation chamber;

[0007] The superheated coolant enters the recovery chamber, and then the low-temperature coolant in the circulation chamber enters the water-cooling pipe. After the hot and cold replacement is completed, the float in the recovery chamber floats up, and the float in the circulation chamber falls, driving the extrusion assembly away from the brake assembly. The center of gravity will cause the coolant to press the rotating box to rotate, so that the recovery chamber is located at the bottom of the motor waiting for natural cooling.

[0008] As a preferred embodiment of the above technical solution, the brake stop assembly includes:

[0009] A guide rod is fixed in the inner wall of the sliding mouth, and a push plate is provided on the outer ring movable sleeve of the guide rod, a spring is connected between the two push plates, and a positioning rod is fixedly connected to the side wall of the push plate, and the positioning rod passes through the rotating box and contacts the circulating replacement box.

[0010] As a preferred embodiment of the above technical solution, the extrusion assembly includes:

[0011] A connecting rod is fixedly connected to the floating ball, a sliding opening is provided on the guide column, the connecting rod and the sliding opening are slidably matched, and an extrusion plate is fixedly connected to one side of the connecting rod, and the extrusion plate is located between the two push plates.

[0012] As a preferred embodiment of the above technical solution, the rotating box includes:

[0013] The outer liner 2 is provided with the inner liner 2 inside, two partition plates are fixedly connected between the inner liner 2 and the outer liner 2, and the positioning rod passes through the inner liner 2.

[0014] As a preferred embodiment of the above technical solution, the circulation replacement box includes:

[0015] An outer liner one, an inner liner one is arranged inside the outer liner one, a slide groove is opened on the outer surface of the inner liner one, the end of the positioning rod away from the push plate extends into the slide groove, and is fixedly connected with an anti-slip pad that interferes with the slide groove, the outer surface of the outer liner two is in contact with the inner surface of the outer liner one, and the inner surface of the inner liner two is in contact with the outer surface of the inner liner one, and an annular plate two arranged on both sides of the outer liner two is fixedly connected between the inner liner one and the outer liner one.

[0016] As a preferred embodiment of the above technical solution, the water cooling pipe includes:

[0017] A spiral tube, wherein the spiral tube is located in the inner circle of the inner tank one, and the spiral tube is equipped with a connecting tube one and a connecting tube two, the recovery chamber and the circulation chamber respectively penetrate two annular plates two and are interconnected with the recovery chamber and the circulation chamber, and the connecting tube one and the connecting tube two are both equipped with an electromagnetic valve, and a temperature sensor electrically connected to the electromagnetic valve is installed at the water inlet end of the spiral tube.

[0018] As a preferred embodiment of the above technical solution, the motor housing includes:

[0019] The outer shell is provided with an inner shell in its inner ring, the outer surface of the outer liner is fitted with the inner surface of the outer shell, the spiral tube is sleeved on the outer surface of the inner shell, and the water outlet and water inlet of the spiral tube both pass through the outer shell, and a detachable annular plate is installed between the outer shell and the inner shell.

[0020] The beneficial effects of the present invention are:

[0021] 1. The overheated coolant of the present invention enters the recovery chamber, and then the low-temperature coolant in the circulation chamber enters the water cooling pipe. After the hot and cold replacement is completed, the float in the recovery chamber floats up, and the float in the circulation chamber falls, driving the extrusion assembly away from the brake assembly. The center of gravity will cause the coolant to press the rotating box to rotate, so that the recovery chamber is located at the bottom of the motor to wait for natural cooling. The two coolants are circulated for use to avoid their temperature being too high to take away the heat inside the motor, thereby improving the heat dissipation efficiency and service life of the motor;

[0022] 2. In the present invention, when the temperature of the coolant in the water-cooling pipe exceeds 80°C, the heat cannot be taken away quickly. At this time, the solenoid valve opens, allowing the high-temperature coolant inside the water-cooling pipe to flow into the recovery chamber, and the low-temperature coolant in the circulation chamber to flow into the water-cooling pipe. After the replacement is completed, the solenoid valve is closed to maintain the heat dissipation efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 What is shown is a schematic diagram of the exploded structure of a water-cooled permanent magnet synchronous motor in an embodiment;

[0024] Figure 2 What is shown is a schematic diagram of the structure of a water-cooled permanent magnet synchronous motor in an embodiment;

[0025] Figure 3 What is shown is a schematic diagram of the structure of the cyclic replacement mechanism in the embodiment;

[0026] Figure 4 It shows Figure 1 A schematic diagram of the structure enlargement at point A;

[0027] Figure 5 What is shown is a schematic structural diagram of a positioning structure in an embodiment.

[0028] Description of reference numerals:

[0029] 10. Motor housing; 11. Outer shell; 12. Inner shell; 13. Annular plate one; 20. Circular replacement mechanism; 21. Circular replacement box; 211. Outer liner one; 212. Inner liner one; 213. Annular plate two; 214. Slide; 22. Rotating box; 221. Outer liner two; 222. Inner liner two; 223. Partition plate; 23. Positioning structure; 231. Guide column; 232. Slide; 234. Float; 235. Connecting rod; 236. Extrusion plate; 237. Guide rod; 238. Push plate; 239. Spring; 2310. Positioning rod; 2311. Anti-skid pad; 30. Water cooling pipe; 31. Spiral pipe; 32. Connecting pipe one; 33. Connecting pipe two. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0031] Example

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a water-cooled permanent magnet synchronous motor comprises a motor housing 10, wherein the inner interlayer of the motor housing 10 is provided with a circulation replacement mechanism 20 and a water cooling tube 30, wherein the circulation replacement mechanism 20 comprises a circulation replacement box 21, wherein the inner interlayer of the circulation replacement box 21 is provided with a rotatable rotating box 22, wherein the interlayer of the rotating box 22 is provided with a recovery chamber and a circulation chamber, and a positioning structure 23 for limiting its own rotation is also provided, wherein the recovery chamber and the circulation chamber are respectively connected with the water inlet end and the drainage end of the water cooling tube 30, wherein the positioning structure 23 comprises a guide column 231 fixed between the interlayers of the rotating box 22, wherein a brake stop assembly is provided inside the guide column 231, wherein the brake stop assembly penetrates the rotating box 22 and contacts the circulation replacement box 21, wherein a floating ball 234 is provided on the outer ring movable sleeve of the guide column 231, wherein an extrusion assembly matching the brake stop assembly is provided inside the floating ball 234, and wherein the two guide columns 231 are respectively located in the recovery chamber and the circulation chamber.

[0033] Specifically, the overheated coolant enters the recovery chamber, and then the low-temperature coolant in the circulation chamber enters the water-cooling tube 30. After the hot and cold replacement is completed, the float 234 in the recovery chamber floats up, and the float 234 in the circulation chamber falls, driving the extrusion assembly away from the brake assembly. The center of gravity will cause the coolant to press the rotating box 22 to rotate, so that the recovery chamber is located at the bottom of the motor and waits for natural cooling. The two coolants are circulated for use to avoid their temperature being too high to take away the heat inside the motor, thereby improving the heat dissipation efficiency and service life of the motor.

[0034] like Figure 3 , Figure 4 and Figure 5 As shown, the brake assembly includes a guide rod 237, which is fixed in the inner wall of the slide 232, and the outer ring of the guide rod 237 is provided with a push plate 238, a spring 239 is connected between the two push plates 238, and the side wall of the push plate 238 is fixedly connected with a positioning rod 2310, which passes through the rotating box 22 and contacts the circulating replacement box 21.

[0035] Specifically, at least two guide rods 237 are provided to increase the stability of the push plates 238 sliding on the guide rods 237. The guide rods 237 are round rods with thin ends and thick middle, so that the two push plates 238 cannot merge toward the middle. The spring 239 is sleeved on the outer ring of the guide rods 237 to prevent bending during the contraction process. Through the action of the spring 239, the push plates 238 are brought closer to the middle in the absence of any external interference. At this time, the positioning rod 2310 will not conflict with the circulation replacement box 21. When the extrusion assembly comes to the middle of the two push plates 238, the two push plates 238 will be separated, and the positioning rod 2310 will be pushed to conflict with the circulation replacement box 21, so that the rotating box 22 cannot rotate in the interlayer of the circulation replacement box 21.

[0036] like Figure 3 , Figure 4 and Figure 5 As shown, the extrusion assembly includes a connecting rod 235, which is fixedly connected to the float 234, and a guide column 231 is provided with a sliding opening 232, and the connecting rod 235 and the sliding opening 232 are slidably matched, and an extrusion plate 236 is fixedly connected to one side of the connecting rod 235, and the extrusion plate 236 is located between the two push plates 238.

[0037] Specifically, the height of the float 234 will change with the change of the liquid level of the cooling oil in the recovery chamber or the circulation chamber, thereby driving the extrusion plate 236 to move together through the connecting rod 235. The side of the extrusion plate 236 away from the connecting rod 235 is tapered, making it easy to insert between the two push plates 238 and squeeze them open.

[0038] like Figure 1 , Figure 3 and Figure 4 As shown, the rotating box 22 includes an outer liner 221 , an inner liner 222 is arranged inside the outer liner 221 , two partition plates 223 are fixedly connected between the inner liner 222 and the outer liner 221 , and a positioning rod 2310 passes through the inner liner 222 .

[0039] Specifically, the two partition plates 223 divide the interlayer between the outer liner 221 and the inner liner 222 into two semicircular cavities of equal volume, namely a recovery cavity and a circulation cavity. The guide column 231 is located in the middle of the semicircular cavity. In the initial state, there is no coolant inside the recovery cavity, and the coolant is set in the circulation cavity at the bottom, waiting for replacement and use.

[0040] like Figure 1 , Figure 3 and Figure 4As shown, the circulation replacement box 21 includes an outer liner 211, an inner liner 212 is arranged inside the outer liner 211, a slide groove 214 is provided on the outer surface of the inner liner 212, a positioning rod 2310 extends into the slide groove 214 at one end away from the push plate 238, and is fixedly connected with an anti-slip pad 2311 that interferes with the slide groove 214, the outer surface of the outer liner 221 is fitted with the inner surface of the outer liner 211, the inner surface of the inner liner 222 is fitted with the outer surface of the inner liner 212, and an annular plate 213 arranged on both sides of the outer liner 221 is fixedly connected between the inner liner 212 and the outer liner 211.

[0041] Specifically, the rotating box 22 can rotate between the outer liner 211 and the inner liner 212, and can be sealed by two annular plates 213 to form a sandwich, where the cooling oil to be circulated is set. At the same time, when the extrusion plate 236 enters between the two push plates 238 to open them, the anti-skid pad 2311 will interfere with the side wall of the slide groove 214 to prevent the rotating box 22 from rotating as a whole. When the extrusion plate 236 moves away from the two push plates 238, the anti-skid pad 2311 will move away from the side wall of the slide groove 214, so that the positioning structure 23 can rotate.

[0042] like Figure 1 and Figure 2 As shown, the water cooling tube 30 includes a spiral tube 31, which is located in the inner circle of the inner tank 212, and the spiral tube 31 is installed with a connecting tube 1 32 and a connecting tube 2 33, the recovery chamber and the circulation chamber respectively pass through the two annular plates 213 and are interconnected with the recovery chamber and the circulation chamber, and the connecting tube 1 32 and the connecting tube 2 33 are both installed with solenoid valves, and the water inlet end of the spiral tube 31 is installed with a temperature sensor electrically connected to the solenoid valve.

[0043] Specifically, the model of the temperature sensor used is but not limited to: SVT200-T. When the coolant temperature in the water-cooling pipe 30 exceeds 80°C-90°C, the heat cannot be taken away quickly. At this time, the solenoid valve opens, allowing the high-temperature coolant inside the water-cooling pipe 30 to flow into the recovery chamber, and the low-temperature coolant in the circulation chamber to flow into the water-cooling pipe 30. After the replacement is completed, the solenoid valve is closed to maintain the heat dissipation efficiency of the motor.

[0044] like Figure 1 and Figure 2 As shown, the motor housing 10 includes an outer shell 11, an inner shell 12 is provided on the inner ring of the outer shell 11, the outer surface of the outer liner 211 is fitted with the inner surface of the outer shell 11, the spiral tube 31 is sleeved on the outer surface of the inner shell 12, and the water outlet and water inlet ends of the spiral tube 31 both pass through the outer shell 11, and a detachable annular plate 13 is installed between the outer shell 11 and the inner shell 12.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A water-cooled permanent magnet synchronous motor, comprising a motor housing (10), characterized in that: The inner interlayer of the motor housing (10) is provided with a circulation replacement mechanism (20) and a water cooling pipe (30), the circulation replacement mechanism (20) comprises a circulation replacement box (21), the inner interlayer of the circulation replacement box (21) is provided with a rotatable rotating box (22), the interlayer of the rotating box (22) is provided with a recovery chamber and a circulation chamber, and a positioning structure (23) for limiting its own rotation is also provided, the recovery chamber and the circulation chamber are respectively connected to the water inlet end and the water outlet end of the water cooling pipe (30); The positioning structure (23) comprises a guide column (231) fixed between the interlayers of the rotating box (22), a brake assembly is arranged inside the guide column (231), the brake assembly penetrates the rotating box (22) and contacts the circulating replacement box (21), a floating ball (234) is arranged on the outer ring movable sleeve of the guide column (231), an extrusion assembly matched with the brake assembly is arranged inside the floating ball (234), and the two guide columns (231) are respectively located in the recovery chamber and the circulation chamber; The overheated coolant enters the recovery chamber, and then the low-temperature coolant in the circulation chamber enters the water-cooling pipe (30). After the hot and cold replacement is completed, the float (234) in the recovery chamber floats up, and the float (234) in the circulation chamber falls, driving the extrusion component away from the brake component. The center of gravity causes the coolant to press the rotating box (22) to rotate, so that the recovery chamber is located at the bottom of the motor to wait for natural cooling.

2. The water-cooled permanent magnet synchronous motor according to claim 1, characterized in that: The brake components include: A guide rod (237) is fixed in the inner wall of the sliding opening (232), and a push plate (238) is provided on the outer ring of the guide rod (237), a spring (239) is connected between the two push plates (238), and a positioning rod (2310) is fixedly connected to the side wall of the push plate (238), and the positioning rod (2310) passes through the rotating box (22) and contacts the circulating replacement box (21).

3. The water-cooled permanent magnet synchronous motor according to claim 2, characterized in that: The extrusion assembly includes: A connecting rod (235), the connecting rod (235) is fixedly connected to the floating ball (234), the guide column (231) is provided with a sliding opening (232), the connecting rod (235) and the sliding opening (232) are slidably matched, and one side of the connecting rod (235) is fixedly connected to an extrusion plate (236), and the extrusion plate (236) is located between the two push plates (238).

4. The water-cooled permanent magnet synchronous motor according to claim 2, characterized in that: The rotating box (22) comprises: The second outer liner (221) is provided with the second inner liner (222) inside, two partition plates (223) are fixedly connected between the second inner liner (222) and the second outer liner (221), and the positioning rod (2310) passes through the second inner liner (222).

5. The water-cooled permanent magnet synchronous motor according to claim 4, characterized in that: The circulation replacement box (21) comprises: An outer liner (211), wherein an inner liner (212) is arranged inside the outer liner (211), a slide groove (214) is provided on the outer surface of the inner liner (212), one end of the positioning rod (2310) away from the push plate (238) extends into the slide groove (214), and is fixedly connected with an anti-slip pad (2311) that contacts the slide groove (214), the outer surface of the outer liner (221) is in contact with the inner surface of the outer liner (211), the inner surface of the inner liner (222) is in contact with the outer surface of the inner liner (212), and an annular plate (213) arranged on both sides of the outer liner (221) is fixedly connected between the inner liner (212) and the outer liner (211).

6. The water-cooled permanent magnet synchronous motor according to claim 5, characterized in that: The water cooling pipe (30) comprises: A spiral tube (31), the spiral tube (31) is located in the inner circle of the inner tank one (212), and the spiral tube (31) is equipped with a connecting tube one (32) and a connecting tube two (33), the recovery chamber and the circulation chamber respectively penetrate the two annular plates two (213) and are interconnected with the recovery chamber and the circulation chamber, and the connecting tube one (32) and the connecting tube two (33) are both equipped with electromagnetic valves, and the water inlet end of the spiral tube (31) is equipped with a temperature sensor electrically connected to the electromagnetic valve.

7. The water-cooled permanent magnet synchronous motor according to claim 6, characterized in that: The motor housing (10) comprises: An outer shell (11), the inner ring of the outer shell (11) is provided with an inner shell (12), the outer surface of the outer liner (211) is in contact with the inner surface of the outer shell (11), the spiral tube (31) is sleeved on the outer surface of the inner shell (12), and the water outlet end and the water inlet end of the spiral tube (31) both pass through the outer shell (11), and a detachable annular plate (13) is installed between the outer shell (11) and the inner shell (12).

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