Water cooling system of permanent magnet synchronous motor

Abstract

The application discloses a water cooling system of a permanent magnet synchronous motor, which comprises a motor shell, a water cooling pipe and an alarm mechanism, wherein the motor shell comprises an outer shell and an inner shell, 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 pipe is sleeved on an outer ring of the inner shell, the inner pipe is sleeved in an inner ring of the outer pipe and penetrates through side walls of the outer shell at both ends, and a cavity for storing leaked cooling liquid is arranged 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 wire. When a leakage point of the inner pipe appears and the internal cooling liquid flows into the cavity, two conducting needles are contacted with the cooling liquid to form a loop, so that the buzzer is triggered to alarm and relevant personnel are reminded to timely maintain, so that the fault is prevented from being further expanded and the cooling liquid is prevented from seeping into a rotor and other structures.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of permanent magnet synchronous motors, and particularly relates to a water cooling system of a permanent magnet synchronous motor. BACKGROUND

[0002] Permanent magnet synchronous motors (PMSM) are widely used in electric vehicles, industrial automation, wind power generation and other fields due to their high efficiency, high power density, rapid response and other characteristics. However, as the power and speed of the motor increase, a large amount of heat is generated during the operation of the motor, causing the temperature of the motor to rise, and the magnetic steel inside the rotor has the risk of demagnetization at high temperature, thereby affecting the efficiency, reliability and service life of the motor.

[0003] In the water cooling system, cooling liquid flows in the water cooling pipeline, and cooling liquid leakage is inevitable. Therefore, it is particularly important to detect the leakage of the water cooling pipeline and alarm in time. The existing pipeline leakage detection technology is mostly used in water supply and oil supply pipelines, and the overall configuration is complex, the configuration cost is high, and the size of the detection device is large, which is difficult to apply to the water cooling system of the motor. SUMMARY

[0004] The application proposes the following technical solutions in view of the problems in the prior art.

[0005] A water cooling system of a permanent magnet synchronous motor comprises:

[0006] A motor housing comprises an outer housing and an inner housing, the inner housing is sleeved in the inner ring of the outer housing, and the inner housing is detachably connected with the outer housing through a positioning assembly;

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

[0008] An alarm mechanism comprises a buzzer and a battery, the buzzer is electrically connected with the battery through a wire, and the buzzer and the battery are both electrically connected with a conducting needle, and both the conducting needles extend into the cavity;

[0009] When the inner pipe has a leakage point, the internal cooling liquid flows into the cavity, and the two conducting needles contact the cooling liquid to form a loop, thereby triggering the buzzer to alarm;

[0010] One end of the conducting needle in the cavity is provided with a butt joint assembly, and the butt joint assemblies are butted to directly form a loop to trigger the buzzer to alarm;

[0011] The docking assembly comprises a U-shaped frame, the inner wall of the U-shaped frame is provided with a fixing block, the outer wall is fixedly connected with a metal guide sheet, the conducting needle penetrates through the fixing block and is fixedly connected with a wire two, and the wire two is connected with the metal guide sheet at the end away from the conducting needle.

[0012] The inner wall of the U-shaped frame is provided with a guide groove, the outer wall is fixedly connected with a sliding block which is slidingly connected with the inner wall of the outer tube, and a gas bag is arranged to provide buoyancy, the side wall of the fixing block is fixedly connected with a guide block which is slidingly connected with the guide groove.

[0013] As a preferred embodiment of the above technical scheme, the wire core of the wire one and the wire two is made of copper, iron, aluminum or the like.

[0014] As a preferred embodiment of the above technical scheme, the positioning assembly comprises:

[0015] A sealing check ring one is fixedly sleeved on the outer ring of the inner shell, a sealing ring one is arranged between the outer shell and the sealing check ring one, one side of the sealing check ring one is fixedly connected with a foolproof block, one side of the foolproof block is fixedly connected with a plug strip, the outer shell is provided with a foolproof opening, one side of the foolproof opening is provided with a plug groove, and the plug strip is plug-connected with the plug groove.

[0016] A sealing check ring two is fixedly sleeved in the inner ring of the outer shell, and a sealing ring two is arranged between the inner shell and the sealing check ring two.

[0017] As a preferred embodiment of the above technical scheme, one side of the plug groove is provided with an internal thread hole, the plug strip is provided with a T-shaped hole, a bolt is arranged in the T-shaped hole, and the bolt is screw-connected with the internal thread hole.

[0018] As a preferred embodiment of the above technical scheme, the outer tube and the inner tube are made of copper or aluminum or the like.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. When the inner tube has a leakage point, the cooling liquid in the inner tube flows into the cavity, the two conducting needles are in contact with the cooling liquid to form a loop, and the buzzer is triggered to alarm, so that the relevant personnel can timely repair, and the fault is avoided from being further expanded to cause the cooling liquid to seep into the rotor and other structures.

[0021] 2. The two docking assemblies are arranged, one of the docking assemblies is pushed by the buoyancy of the cooling liquid to abut against the other docking assembly, the buzzer, the wire one and the battery form a loop through the two conducting needles and the docking assemblies, and the buzzer is triggered to alarm. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A structure schematic diagram of a water cooling system of a permanent magnet synchronous motor in an embodiment is shown.

[0023] Figure 2 An enlarged structural schematic view of the structure at A in Figure 1 ;

[0024] Figure 3 An enlarged structural schematic view of the structure at A in ;

[0025] Figure 4 An enlarged structural schematic view of the structure at A in ;

[0026] Figure 5 An enlarged structural schematic view of the structure at A in ;

[0027] Figure 6 An enlarged structural schematic view of the structure at A in

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 10, motor housing; 11, outer housing; 12, inner housing; 13, sealing retainer one; 14, foolproof block; 15, insertion bar; 16, bolt; 17, sealing retainer two; 20, water cooling pipe; 21, outer pipe; 22, inner pipe; 30, alarm mechanism; 31, buzzer; 32, wire one; 33, battery; 34, conducting needle; 35, docking assembly; 351, back-shaped frame; 352, guide groove; 353, sliding block; 354, air bag; 355, metal guide sheet; 356, fixed block; 357, wire two. DETAILED DESCRIPTION

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

[0031] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a water cooling system of 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 circle of the outer housing 11 and is detachably connected with the outer housing 11 through a positioning assembly, the water cooling pipe 20 includes an outer pipe 21 and an inner pipe 22, the outer pipe 21 is sleeved on the outer circle of the inner housing 12, the inner pipe 22 is sleeved in the inner circle of the outer pipe 21 and penetrates the side wall of the outer housing 11 at both ends, a cavity for storing the leaked cooling liquid is arranged between the outer pipe 21 and the inner pipe 22, the alarm mechanism 30 includes a buzzer 31 and a battery 33, the buzzer 31 is electrically connected with the battery 33 through a wire 1 32, and the buzzer 31 and the battery 33 are both electrically connected with a conducting needle 34, and the two conducting needles 34 both extend into the cavity.

[0032] Specifically, one end of the conducting needle 34 in the cavity does not need to be provided with an insulating layer, the outer pipe 21 is attached to the inner wall of the inner housing 12 together, so that the cooling liquid in the inner pipe 22 can take away the high temperature generated by the rotor and other components during circulation, when the inner pipe 22 has a leakage point, the internal cooling liquid flows into the cavity after the internal cooling liquid flows into the cavity, the two conducting needles 34 are in contact with the cooling liquid to form a loop, thereby triggering the buzzer 31 to alarm and reminding the relevant personnel to repair in time to avoid further expansion of the fault and cause the cooling liquid to seep into the rotor and other structures.

[0033] As shown in Figure 4 , one end of the conducting needle 34 in the cavity is provided with a butt joint assembly 35, and the two butt joint assemblies 35 are directly connected to form a loop to trigger the buzzer 31 to alarm.

[0034] Specifically, when the motor is vertically installed, the alarm mechanism 30 is arranged near the end of the water cooling pipe 20, and the time for the cooling liquid to overflow the two conducting needles 34 in the cavity is longer than when the motor is horizontally installed, which causes the alarm to be not timely, by arranging two butt joint assemblies 35, one of the butt joint assemblies 35 is pushed to abut against the other butt joint assembly 35 by the buoyancy of the cooling liquid, so that the buzzer 31, the wire 1 32 and the battery 33 form a loop through the two conducting needles 34 and the butt joint assemblies 35, so that the buzzer 31 can be triggered to alarm.

[0035] As shown in Figure 5 and Figure 6 , the butt joint assembly 35 includes a meandering frame 351, the inner wall of the meandering frame 351 is provided with a fixed block 356, the outer wall is fixedly connected with a metal guide sheet 355, the conducting needle 34 penetrates through the fixed block 356 and is fixedly connected with a wire 2 357, and one end of the wire 2 357 away from the conducting needle 34 is connected with the metal guide sheet 355.

[0036] Specifically, the wire two 357 adopts a spring wire, which can automatically retract after being stretched. When the two metal tabs 355 touch each other, the alarm mechanism 30 as a whole forms a loop. The battery 33 provides power for the buzzer 31 to alarm. Through the setting program, the buzzer 31 can alarm only after the two metal tabs 355 contact for 5 seconds, preventing false touch.

[0037] As shown in Figure 5 and Figure 6 , the inner wall of the U-shaped frame 351 is provided with a guide groove 352, the outer wall is fixedly connected with a sliding block 353 which is slidingly connected with the inner wall of the outer pipe 21, and the air bag 354 provides buoyancy. The side wall of the fixed block 356 is fixedly connected with a guide block which is slidingly connected with the guide groove 352.

[0038] Specifically, the air bag 354 provides buoyancy, the sliding block 353 provides a guiding effect, so that after the cooling liquid leaks into the cavity, the air bag 354 pushes the U-shaped frame 351 to move, and the positions of the conducting needle 34 and the fixed block 356 remain unchanged. When the two metal tabs 355 butt joint, a loop is formed.

[0039] As shown in Figure 4 , Figure 5 and Figure 6 , the wire core of the wire one 32 and the wire two 357 is made of copper, iron, aluminum or other materials. Embodiment

[0040] As shown in Figure 1 , Figure 2 and Figure 3 , a water cooling system of a permanent magnet synchronous motor, compared with embodiment 1, the positioning assembly of the present embodiment comprises a sealing check ring one 13 and a sealing check ring two 17. The sealing check ring one 13 is fixedly sleeved on the outer ring of the inner shell 12. A sealing ring one is arranged between the outer shell 11 and the sealing check ring one 13. One side of the sealing check ring one 13 is fixedly connected with an anti-fooling block 14. One side of the anti-fooling block 14 is fixedly connected with a plug strip 15. The outer shell 11 is provided with an anti-fooling opening. One side of the anti-fooling opening is provided with a plug slot. The plug strip 15 is plugged into the plug slot. The sealing check ring two 17 is fixedly sleeved in the inner ring of the outer shell 11. A sealing ring two is arranged between the inner shell 12 and the sealing check ring two 17.

[0041] Specifically, the inner shell 12 can be pulled out from the inside of the outer shell 11 from the side where the sealing check ring one 13 is installed. The water cooling pipe 20 is located between the sealing check ring one 13 and the sealing check ring two 17. When the inner shell 12 is pulled out from the inside of the outer shell 11, the water cooling pipe 20 can be taken out from the inside of the outer shell 11. Through the setting of the anti-fooling opening, the inner shell 12 can be prevented from being misaligned during installation.

[0042] As shown in Figure 1 and Figure 2As shown, one side of the slot is provided with an internally threaded hole, the insert 15 is provided with a T-shaped hole, and a bolt 16 is arranged in the T-shaped hole and is in threaded connection with the internally threaded hole.

[0043] Specifically, the inner shell 12 is fixed with the outer shell 11 together by cooperation of the bolt 16, the T-shaped hole and the internally threaded hole.

[0044] As shown in Figure 1 , Figure 3 and Figure 4 , the outer tube 21 and the inner tube 22 are made of copper or aluminum or the like.

[0045] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it.

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 outer pipe (21) 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 first wire (32), and the buzzer (31) and the battery (33) being electrically connected to conductive needles (34), both of which extend 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; 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 circuit when docked, triggering the buzzer (31) to sound an alarm; 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); The inner wall of the circular frame (351) is provided with a guide groove (352), the outer wall of which is fixedly connected to 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 to a guide block, which is slidably connected to the guide groove (352).

2. The water cooling system of a permanent magnet synchronous motor according to claim 1, characterized in that: The cores of the conductor one (32) and the conductor two (357) are made of copper, iron, aluminum or the like.

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

4. The water cooling system of a permanent magnet synchronous motor according to claim 3, 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 provided in the T-shaped hole, and the bolt (16) is threadedly connected to the internal threaded hole.

5. 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 or aluminum.

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