Water cooling system of permanent magnet synchronous motor

Abstract

The invention discloses a water cooling system of a permanent magnet synchronous motor, which comprises a motor shell, the motor shell comprises an outer shell and an inner shell, and the inner shell is sleeved in an inner ring of the outer shell and is detachably connected with the outer shell through a positioning assembly; the water cooling pipe comprises an outer pipe and an inner pipe, the outer ring of the inner shell is sleeved with the outer pipe, the inner ring of the outer pipe is sleeved with the inner pipe, the two ends of the inner pipe penetrate through the side wall of the outer shell, and a cavity used for storing leaked cooling liquid is formed between the outer pipe and the inner pipe; the alarm mechanism comprises a buzzer and a battery, and the buzzer is electrically connected with the battery through a first wire. When a leakage point occurs in the inner pipe and internal cooling liquid flows into the cavity, the two conduction needles make contact with the cooling liquid to form a loop, so that the buzzer is triggered to give an alarm, related personnel are reminded to conduct maintenance in time, and the situation that faults are further expanded, and consequently the cooling liquid permeates into a rotor and other structures is avoided.

Description

Technical Field

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

[0002] Permanent magnet synchronous motor (PMSM) is widely used in electric vehicles, industrial automation, wind power generation and other fields due to its high efficiency, high power density and rapid response. However, as the motor power and speed increase, the motor will generate a lot of heat during operation, causing the motor temperature to rise. The magnetic steel inside the rotor is at risk of demagnetization at high temperatures, which in turn affects its efficiency, reliability and service life.

[0003] In the water cooling system, coolant flows in the water cooling pipes, and it is inevitable that coolant leaks will occur. Therefore, it is particularly important to detect water cooling pipe leaks and give an alarm in time. Existing pipeline leakage detection technologies are mostly used in water supply, oil supply and other pipelines. The overall configuration is complex, the configuration cost is high, and the size of the detection device is large, making it difficult to apply to water cooling systems such as motors. 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 cooling system for a permanent magnet synchronous motor, comprising:

[0006] A motor housing, the motor housing comprising an outer housing and an inner housing, the inner housing being sleeved in an inner ring of the outer housing and detachably connected to the outer housing via a positioning assembly;

[0007] A water cooling pipe, the water cooling pipe comprises an outer pipe and an inner pipe, the outer pipe is sleeved on the outer ring of the inner shell, the inner pipe is sleeved in the inner ring of the outer pipe, and both ends thereof penetrate the side wall of the outer shell, and a cavity for storing leaked coolant is provided between the outer pipe and the inner pipe;

[0008] An alarm mechanism, the alarm mechanism comprising a buzzer and a battery, the buzzer being electrically connected to the battery via a wire 1, and the buzzer and the battery being electrically connected to conductive needles, and both of the conductive needles extending into the cavity;

[0009] When a leak occurs in the inner tube and the coolant inside flows into the cavity, the two conductive needles contact the coolant to form a loop, thereby triggering the buzzer alarm.

[0010] As a preferred embodiment of the above technical solution, a docking assembly is installed at one end of the conduction needle located in the cavity, and two docking assemblies can directly form a loop by docking to trigger a buzzer alarm.

[0011] As a preferred embodiment of the above technical solution, the docking assembly includes:

[0012] The circular frame has a fixed block on its inner wall and a metal guide fixedly connected to its outer wall. The conductive needle passes through the fixed block and is fixedly connected to a second conductive wire. The end of the second conductive wire away from the conductive needle is connected to the metal guide.

[0013] As a preferred embodiment of the above technical solution, the inner wall of the circular frame is provided with a guide groove, the outer wall is fixedly connected with a slider slidably connected to the inner wall of the outer tube, and an air bag provides buoyancy, the side wall of the fixed block is fixedly connected with a guide block, and the guide block is slidably connected to the guide groove.

[0014] As a preferred embodiment of the above technical solution, the cores of the conductor one and the conductor two are both made of copper, iron, aluminum or the like.

[0015] As a preferred embodiment of the above technical solution, the positioning component includes:

[0016] A sealing ring 1, wherein the sealing ring 1 is fixedly sleeved on the outer ring of the inner shell, a sealing ring 1 is arranged between the outer shell and the sealing ring 1, and a fool-proof block is fixedly connected to one side of the sealing ring 1, and a plug-in strip is fixedly connected to one side of the fool-proof block, and a fool-proof opening is provided in the outer shell, and a slot is provided on one side of the fool-proof opening, and the plug-in strip is plugged into the slot;

[0017] The second sealing ring is fixedly sleeved in the inner ring of the outer shell, and the second sealing ring is arranged between the inner shell and the second sealing ring.

[0018] As a preferred embodiment of the above technical solution, an internal threaded hole is provided on one side of the slot, and the insert strip is provided with a T-shaped hole, a bolt is provided in the T-shaped hole, and the bolt is threadedly connected to the internal threaded hole.

[0019] As a preferred embodiment of the above technical solution, the outer tube and the inner tube are both made of materials such as copper or aluminum.

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

[0021] 1. In the present invention, when a leak occurs in the inner tube and the coolant inside flows into the cavity, the two conductive needles contact the coolant to form a loop, thereby triggering a buzzer alarm to remind relevant personnel to perform repairs in time to avoid further expansion of the fault, which may cause the coolant to penetrate into the rotor and other structures;

[0022] 2. The present invention sets two docking components, so that one of the docking components is pushed by the buoyancy of the coolant to contact with the other docking component, so that the buzzer, wire 1, and battery form a loop through the two conductive needles and the docking component, so that the buzzer can be triggered to alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1What is shown is a schematic structural diagram of a water cooling system for a permanent magnet synchronous motor in an embodiment;

[0024] Figure 2 It shows Figure 1 A schematic diagram of the structure enlargement at point A;

[0025] Figure 3 What is shown is a schematic diagram of the structure of the inner shell in the embodiment;

[0026] Figure 4 What is shown is a schematic diagram of the structure of the water cooling tube in the embodiment;

[0027] Figure 5 What is shown is a schematic diagram of the structure of the docking assembly in the embodiment;

[0028] Figure 6 What is shown is a schematic diagram of the structure of the metal conductor and the second conductor in the embodiment.

[0029] Description of reference numerals:

[0030] 10. Motor housing; 11. Outer housing; 12. Inner housing; 13. Sealing ring 1; 14. Anti-fouling block; 15. Insert strip; 16. Bolt; 17. Sealing ring 2; 20. Water cooling pipe; 21. Outer pipe; 22. Inner pipe; 30. Alarm mechanism; 31. Buzzer; 32. Wire 1; 33. Battery; 34. Conducting needle; 35. Docking assembly; 351. Reciprocating frame; 352. Guide groove; 353. Slider; 354. Airbag; 355. Metal guide; 356. Fixing block; 357. Wire 2. DETAILED DESCRIPTION

[0031] 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.

[0032] Example 1

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a water cooling system for a permanent magnet synchronous motor includes a motor housing 10, a water cooling pipe 20 and an alarm mechanism 30. The motor housing 10 includes an outer housing 11 and an inner housing 12. The inner housing 12 is sleeved in the inner ring of the outer housing 11 and is detachably connected to the outer housing 11 through a positioning assembly. The water cooling pipe 20 includes an outer tube 21 and an inner tube 22. The outer tube 21 is sleeved on the outer ring of the inner housing 12, and the inner tube 22 is sleeved in the inner ring of the outer tube 21, and both ends pass through the side wall of the outer housing 11. A cavity for storing leaked coolant is provided between the outer tube 21 and the inner tube 22. The alarm mechanism 30 includes a buzzer 31 and a battery 33. The buzzer 31 is electrically connected to the battery 33 through a wire 32, and the buzzer 31 and the battery 33 are both electrically connected to a conduction needle 34, and the two conduction needles 34 extend into the cavity.

[0034] Specifically, there is no need to set an insulating layer at one end of the conductive needle 34 located in the cavity. The outer tube 21 is fitted together with the inner wall of the inner shell 12, so that the coolant inside the inner tube 22 can take away the high temperature generated by the rotor and other components during the circulation process. When a leak occurs in the inner tube 22 and the internal coolant flows into the cavity, the two conductive needles 34 contact the coolant to form a loop, thereby triggering the buzzer 31 to alarm, reminding relevant personnel to perform maintenance in time to avoid further expansion of the fault, which will cause the coolant to penetrate into the rotor and other structures.

[0035] like Figure 4 As shown, a docking assembly 35 is installed at one end of the conducting needle 34 located in the cavity, and two docking assemblies 35 can directly form a loop by docking, triggering the buzzer 31 to alarm.

[0036] Specifically, when the motor is installed vertically, the alarm mechanism 30 is arranged at the end near the water-cooling pipe 20. The time for the coolant to flow over the two conductive needles 34 in the cavity is longer than when the motor is installed horizontally, resulting in delayed alarm. By setting two docking components 35, one of the docking components 35 is pushed by the buoyancy of the coolant to contact with the other docking component 35, so that the buzzer 31, the wire 1 32, and the battery 33 form a loop through the two conductive needles 34 and the docking component 35, so that the buzzer 31 can be triggered to alarm.

[0037] like Figure 5 and Figure 6 As shown, the docking assembly 35 includes a circular frame 351, the inner wall of the circular frame 351 is provided with a fixing block 356, the outer wall is fixedly connected to a metal guide 355, the conductive needle 34 passes through the fixing block 356, and is fixedly connected to a second conductive wire 357, and the end of the second conductive wire 357 away from the conductive needle 34 is connected to the metal guide 355.

[0038] Specifically, the second wire 357 adopts a spring wire so that it can automatically retract after being stretched. After the two metal guides 355 touch each other, the alarm mechanism 30 as a whole can form a loop, and the battery 33 provides power for the buzzer 31 to alarm. By setting the program, the two metal guides 355 can be controlled so that the buzzer 31 can alarm only after 5 seconds of contact to prevent accidental touch.

[0039] like Figure 5 and Figure 6 As shown, the inner wall of the circular frame 351 is provided with a guide groove 352, the outer wall is fixedly connected with a slider 353 which is slidably connected to the inner wall of the outer tube 21, and an air bag 354 which provides buoyancy, and the side wall of the fixed block 356 is fixedly connected with a guide block which is slidably connected to the guide groove 352.

[0040] Specifically, the airbag 354 provides buoyancy and the slider 353 provides a guiding function, so that after the coolant leaks into the cavity, the airbag 354 pushes the circular frame 351 to move, and the positions of the conductive needle 34 and the fixed block 356 remain unchanged. When the two metal guides 355 are docked, a loop is formed.

[0041] like Figure 4 , Figure 5 and Figure 6 As shown, the wire cores of the conductor 1 32 and the conductor 2 357 are both made of copper, iron, aluminum or the like.

[0042] Example 2

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, a water cooling system for a permanent magnet synchronous motor, compared with Example 1, the positioning assembly of this embodiment includes a sealing retaining ring 13 and a sealing retaining ring 17, the sealing retaining ring 13 is fixedly sleeved on the outer ring of the inner shell body 12, a sealing retaining ring 1 is arranged between the outer shell body 11 and the sealing retaining ring 13, and a fool-proof block 14 is fixedly connected to one side of the sealing retaining ring 13, a plug-in strip 15 is fixedly connected to one side of the fool-proof block 14, the outer shell body 11 is provided with a fool-proof opening, a slot is provided on one side of the fool-proof opening, and the plug-in strip 15 is plugged into the slot; the sealing retaining ring 17 is fixedly sleeved in the inner ring of the outer shell body 11, and a sealing ring 2 is arranged between the inner shell body 12 and the sealing retaining ring 17.

[0044] Specifically, the inner shell 12 can be pulled out from the outer shell 11 from the side where the sealing retaining ring 13 is installed. The water cooling pipe 20 is located between the sealing retaining ring 13 and the sealing retaining ring 2 17. When the inner shell 12 is pulled out from the outer shell 11, the water cooling pipe 20 can be taken out from the outer shell 11. The setting of the anti-misalignment opening can prevent the inner shell 12 from being misplaced during the installation process.

[0045] like Figure 1 and Figure 2As shown, an internal threaded hole is provided on one side of the slot, and the inserting strip 15 is provided with a T-shaped hole. A bolt 16 is provided in the T-shaped hole, and the bolt 16 is threadedly connected with the internal threaded hole.

[0046] Specifically, the inner housing 12 can be firmly fixed to the outer housing 11 through the cooperation of the bolt 16 , the T-shaped hole and the internal threaded hole.

[0047] like Figure 1 , Figure 3 and Figure 4 As shown, the outer tube 21 and the inner tube 22 are both made of copper or aluminum.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A water cooling system for a permanent magnet synchronous motor, characterized in that: include: A motor housing (10), the motor housing (10) comprising an outer housing (11) and an inner housing (12), the inner housing (12) being sleeved in an inner ring of the outer housing (11) and detachably connected to the outer housing (11) via a positioning assembly; A water cooling pipe (20), the water cooling pipe (20) comprising an outer pipe (21) and an inner pipe (22), the outer pipe (21) being sleeved on the outer ring of the inner shell (12), the inner pipe (22) being sleeved in the inner ring of the outer pipe (21), and both ends of the water cooling pipe (20) passing through the side wall of the outer shell (11), and a cavity for storing leaked coolant being provided between the outer pipe (21) and the inner pipe (22); An alarm mechanism (30), the alarm mechanism (30) comprising a buzzer (31) and a battery (33), the buzzer (31) being electrically connected to the battery (33) via a wire (32), and the buzzer (31) and the battery (33) being electrically connected to a conducting needle (34), and the two conducting needles (34) both extending into the cavity; When a leak occurs in the inner tube (22), the coolant inside flows into the cavity, and the two conductive needles (34) contact the coolant to form a loop, thereby triggering the buzzer (31) to sound an alarm.

2. The water cooling system of a permanent magnet synchronous motor according to claim 1, characterized in that: A docking assembly (35) is installed at one end of the conductive needle (34) located in the cavity, and two docking assemblies (35) can directly form a loop when docked, thereby triggering a buzzer (31) to sound an alarm.

3. A water cooling system for a permanent magnet synchronous motor according to claim 2, characterized in that: The docking assembly (35) comprises: A circular frame (351), the inner wall of which is provided with a fixing block (356), the outer wall of which is fixedly connected with a metal guide piece (355), the conductive needle (34) passes through the fixing block (356) and is fixedly connected with a second conductive wire (357), and the end of the second conductive wire (357) away from the conductive needle (34) is connected with the metal guide piece (355).

4. The water cooling system of a permanent magnet synchronous motor according to claim 3, characterized in that: The inner wall of the circular frame (351) is provided with a guide groove (352), the outer wall is fixedly connected with a slider (353) slidably connected to the inner wall of the outer tube (21), and an air bag (354) providing buoyancy, and the side wall of the fixed block (356) is fixedly connected with a guide block, which is slidably connected to the guide groove (352).

5. The water cooling system of a permanent magnet synchronous motor according to claim 3, characterized in that: The wire cores of the first conductor (32) and the second conductor (357) are both made of copper, iron, aluminum or the like.

6. The water cooling system of a permanent magnet synchronous motor according to claim 1, characterized in that: The positioning components include: A sealing ring (13), the sealing ring (13) is fixedly sleeved on the outer ring of the inner shell (12), a sealing ring (13) is arranged between the outer shell (11) and the sealing ring (13), and a fool-proof block (14) is fixedly connected to one side of the sealing ring (13), and a plug-in strip (15) is fixedly connected to one side of the fool-proof block (14), and the outer shell (11) is provided with a fool-proof opening, and a slot is provided on one side of the fool-proof opening, and the plug-in strip (15) is plugged into the slot; A second sealing ring (17) is fixedly sleeved in the inner ring of the outer shell (11), and a second sealing ring is provided between the inner shell (12) and the second sealing ring (17).

7. The water cooling system of a permanent magnet synchronous motor according to claim 6, characterized in that: An internal threaded hole is provided on one side of the slot, and the inserting strip (15) is provided with a T-shaped hole. A bolt (16) is arranged in the T-shaped hole, and the bolt (16) is threadedly connected to the internal threaded hole.

8. The water cooling system of a permanent magnet synchronous motor according to claim 1, characterized in that: The outer tube (21) and the inner tube (22) are both made of copper, aluminum or other materials.

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