A tough ductile iron motor base for subway motors with temperature overload protection

Abstract

The present invention discloses a ductile ductile iron motor base for subway motors with temperature overload protection, comprising a motor housing and a mounting base, wherein the outer side of the motor housing is provided with a plurality of fins, the mounting base is provided with a storage tank filled with liquid nitrogen, a pipe body assembly for nitrogen flow is wound around the fins on the outer side of the motor housing, a control unit and a small pressure pump for regulating the on and off of nitrogen are provided between the storage tank and the pipe body assembly, and the control unit is composed of a valve body assembly and a drive assembly. In the present invention, a heat dissipation hole is provided on the heat dissipation pipe, and a valve body assembly, a drive assembly and a small pressure pump are provided at the outlet of the storage tank. Compared with the traditional motor base, the present device forms low-temperature nitrogen through liquid nitrogen, and the low-temperature nitrogen is quickly discharged into the heat dissipation pipe by a small pressure pump, and then discharged from the heat dissipation hole, so that the motor housing is cooled by the flow of nitrogen.

Description

Technical Field

[0001] The present invention relates to the technical field of subway motors, in particular to a tough ductile iron motor base with temperature overload protection for subway motors. Background Art

[0002] In the prior art, a motor base generally includes a motor housing (i.e., a component that accommodates a rotor and a stator) and a connecting support for connecting to a mounting base. In the prior art, the connecting support and the motor housing are generally cast to fix the motor.

[0003] When subway motors run for a long time, they will generate a lot of heat. The existing motor base only plays a fixing role and has a simple function, and cannot play an auxiliary heat dissipation role for the motor. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and to propose a tough ductile iron motor base for subway motors with temperature overload protection.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A tough ductile iron motor base for subway motors with temperature overload protection includes a motor housing and a mounting base. The outside of the motor housing has multiple fins. The mounting base is provided with a storage tank filled with liquid nitrogen. A pipe body assembly for nitrogen flow is wound around the fins on the outside of the motor housing. A control unit and a small pressure pump for regulating the on and off of nitrogen are provided between the storage tank and the pipe body assembly. The control unit is composed of a valve body assembly and a drive assembly. The valve body assembly is composed of a first shell, multiple fan-shaped sealing plates, and a guide mechanism for driving the sealing plates to move in the radial direction of the first shell. The valve body assembly is used to regulate the flow rate of nitrogen. The drive assembly includes a second shell filled with gas and a push mechanism distributed axially in the second shell.

[0007] As a further description of the above technical solution:

[0008] The guide mechanism includes a first plate body and a second plate body, both of which are annular. The first plate body is rotatably connected to the first shell, and the second plate body is fixedly connected to the first shell. The first plate body has a first through groove and multiple second through grooves. A connecting wheel is provided in the first through groove, and the connecting wheel is movably connected to the driving assembly. The second plate body has sliding grooves distributed in the radial direction, and both sides of the sealing plate have protrusions that cooperate with the second through groove and the sliding groove.

[0009] As a further description of the above technical solution:

[0010] A spiral heat-conducting wire is provided at the inner upper end of the second shell, and the upper end of the heat-conducting wire extends to the outside of the second shell and fits the outer wall of the motor housing.

[0011] As a further description of the above technical solution:

[0012] A piston is provided inside the second shell, and the piston is located below the thermal wire. A spring is fixedly connected between the bottom of the piston and the bottom of the second shell. The lower end surface of the piston is fixedly connected to a connecting rod, and the connecting rod extends to the inside of the first shell and is rotatably connected to the connecting wheel.

[0013] As a further description of the above technical solution:

[0014] The tube assembly includes a plurality of heat dissipation tubes fixed on the outer wall of the motor housing, a connecting tube is connected between two adjacent heat dissipation tubes, and a plurality of circular heat dissipation holes are provided on the outer sides of the heat dissipation tubes.

[0015] As a further description of the above technical solution:

[0016] An arc-shaped support rod is fixedly connected to the mounting seat, and the storage tank is fixedly connected to the support rod by bolts.

[0017] As a further description of the above technical solution:

[0018] One end of the storage tank is fixedly connected to a tube body and is provided with a through hole. A semicircular fixed plate and a movable plate are provided inside the tube body. The movable plate is rotatably connected to the tube body, and one side of the movable plate is fixedly connected to a rotating handle located outside the tube body.

[0019] As a further description of the above technical solution:

[0020] The tube body is connected to the first shell through a connector and an air pipe. The end face of the connector is fixedly connected to a disc. The end faces of the tube body and the disc both have annular grooves, and a sealing ring is provided in the groove. The tube body and the disc are fixedly connected by multiple bolts.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. In the present invention, the motor base is provided with a motor housing and a mounting base, a storage tank filled with liquid nitrogen is provided on the mounting base, a heat dissipation pipe and a connecting pipe are provided on the motor housing, the heat dissipation pipe is provided with heat dissipation holes, and a valve body assembly, a drive assembly and a small pressure pump are provided at the outlet of the storage tank. Compared with the traditional motor base, the present device forms low-temperature nitrogen through liquid nitrogen, and the low-temperature nitrogen is quickly discharged into the heat dissipation pipe by a small pressure pump, and then discharged from the heat dissipation hole, so that the motor housing is cooled by the flow of nitrogen.

[0023] 2. In the present invention, the valve body assembly on the motor seat is provided with a sealing plate, which is opened and closed by a driving assembly. At the same time, the size of the opening and closing of the sealing plate is controlled by the driving assembly. The driving force of the driving assembly is determined by the temperature of the motor housing. The driving assembly generates pressure through the thermal expansion of the gas to push the piston to generate thrust, thereby moving the sealing plate. The structure is simple and reliable, and heat dissipation can still be carried out after the motor is powered off, and the heat dissipation performance is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the motor housing structure in the present invention;

[0025] Figure 2 This is a schematic diagram of the storage tank structure of the present invention;

[0026] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0027] Figure 4 Schematic diagram of the internal structure of the first shell in the present invention;

[0028] Figure 5 Schematic diagram of the sealing plate structure of the present invention;

[0029] Figure 6 Schematic diagram of the first plate structure in the present invention

[0030] Figure 7 Schematic diagram of the internal structure of the second shell in the present invention

[0031] Figure 8 It is a schematic diagram of the heat pipe structure in the present invention.

[0032] Legend:

[0033] 1. Motor housing; 2. Mounting base; 3. Support rod; 4. Storage tank; 5. Tube body; 6. Through hole; 7. Fixed plate; 8. Movable plate; 9. Rotating handle; 10. Groove; 11. Connector; 12. Disc; 13. First shell; 14. Second shell; 15. Thermal wire; 16. Piston; 17. Connecting rod; 18. Connecting wheel; 19. First plate; 20. First through groove; 21. Sealing plate; 22. Protrusion; 23. Second through groove; 24. Second plate; 25. Small pressure pump; 26. Heat pipe; 27. Connecting pipe; 28. Heat dissipation hole. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] Example:

[0036] See also Figure 1-8 A tough ductile iron motor base for subway motors with temperature overload protection includes a motor housing 1 and a mounting base 2. The outside of the motor housing 1 has multiple fins, and the mounting base 2 is provided with a storage tank 4 filled with liquid nitrogen. A pipe body assembly for nitrogen flow is wrapped around the fins on the outside of the motor housing 1. A control unit and a small pressure pump 25 for adjusting the on and off of nitrogen are provided between the storage tank 4 and the pipe body assembly. The control unit is composed of a valve body assembly and a drive assembly. The valve body assembly consists of a first shell 13, multiple fan-shaped sealing plates 21, and a guide mechanism for driving the sealing plate 21 to move along the radial direction of the first shell 13. The valve body assembly is used to adjust the flow rate of nitrogen. The drive assembly includes a second shell 14 filled with gas and a push mechanism distributed axially in the second shell 14.

[0037] Specifically, such as Figure 4-6 As shown, the guide mechanism includes a first plate 19 and a second plate 24, both of which are annular. The first plate 19 is rotatably connected to the first housing 13, while the second plate 24 is fixedly connected to the first housing 13. The first plate 19 has a first through-slot 20 and multiple second through-slots 23. The first through-slot 20 is provided with a connecting wheel 18, which is movably connected to the drive assembly. The second plate 24 has radially distributed chute grooves. The sealing plate 21 has protrusions 22 on both sides that mate with the second through-slots 23 and the chute grooves. The interaction between the second through-slots 23 and the chute grooves allows the sealing plate 21 to move radially along the first housing 13, thereby adjusting the nitrogen flow area.

[0038] Specifically, such as Figure 7 As shown, a spiral heat-conducting wire 15 is provided at the upper end of the interior of the second shell 14. The upper end of the heat-conducting wire 15 extends to the outside of the second shell 14 and is in contact with the outer wall of the motor housing 1. A piston 16 is provided inside the second shell 14. The piston 16 is located below the heat-conducting wire 15, and a spring is fixedly connected between the bottom of the piston 16 and the bottom of the second shell 14. The lower end surface of the piston 16 is fixedly connected to a connecting rod 17. The connecting rod 17 extends into the interior of the first shell 13 and is rotatably connected to the connecting wheel 18. The gas filled in the second shell 14 is air, helium, etc., which expands when heated and pushes the piston 16 to generate driving force.

[0039] Specifically, such as Figure 1 and Figure 8 As shown, the tube assembly includes multiple heat dissipation tubes 26 fixed to the outer wall of the motor housing 1. A connecting tube 27 is connected between two adjacent heat dissipation tubes 26. The outer side of the heat dissipation tube 26 has multiple circular heat dissipation holes 28. The heat dissipation holes 28 are aligned with the fins to facilitate nitrogen flow, purge and cooling.

[0040] Specifically, such as Figure 1 As shown, an arc-shaped support rod 3 is fixedly connected to the mounting base 2, and the storage tank 4 is fixedly connected to the support rod 3 by bolts.

[0041] Specifically, such as Figure 2-3 As shown, one end of the storage tank 4 is fixedly connected to the tube body 5 and is provided with a through hole 6. The interior of the tube body 5 is provided with a fixed plate 7 and a movable plate 8, both of which are semicircular. The movable plate 8 is rotatably connected to the tube body 5, and one side of the movable plate 8 is fixedly connected to a rotating handle 9 located outside the tube body 5. The tube body 5 is connected to the first shell 13 through a connector 11 and an air pipe. The end face of the connector 11 is fixedly connected to a disc 12. The end faces of the tube body 5 and the disc 12 both have an annular groove 10, and the groove 10 has a sealing ring. The tube body 5 and the disc 12 are fixedly connected by multiple bolts. The movable plate 8 is controlled to rotate by rotating the handle 9 and is used to control the switch of the storage tank 4. At the same time, the connector 11 is connected by bolts, and the connection is stable and reliable. At the same time, there is a sealing ring on the pressing surface, which helps to reduce leakage and improve safety in use.

[0042] Working Principle: When the motor is operating, the temperature of the motor housing 1 rises. The heat conducting wire 15 transfers heat to the second housing 14, causing the gas inside the second housing 14 to expand due to the heat. When the motor temperature exceeds a threshold, the pressure generated by the gas expansion pushes piston 16 downward. Simultaneously, connecting rod 17 moves downward, rotating first plate 19 and further moving sealing plate 21 radially along first housing 13. As piston 16 moves, a sensor detects this movement and activates a small pressure pump 25. As sealing plate 21 opens, the pressure of the liquid nitrogen in storage tank 4 decreases, turning it into a gas. Pressurized by the small pressure pump 25, the nitrogen rapidly flows along the heat pipe 26 and connecting pipe 27. As it flows, the nitrogen is ejected from the heat dissipation holes 28, sweeping across the fins of the motor housing 1. Because the liquid nitrogen is colder than the motor housing 1, it can remove heat from the motor housing 1, thereby assisting in cooling the motor.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A tough ductile iron motor base for a subway motor with temperature overload protection, comprising a motor housing and a mounting base, wherein the outer side of the motor housing has a plurality of fins, characterized in that: A storage tank filled with liquid nitrogen is provided on the mounting seat, a pipe assembly for nitrogen flow is wound on the fins on the outside of the motor housing, a control unit and a pressure pump for adjusting the nitrogen on and off are provided between the storage tank and the pipe assembly, the control unit is composed of a valve body assembly and a drive assembly, the valve body assembly is composed of a first shell, a plurality of fan-shaped sealing plates and a guide mechanism for driving the sealing plates to move along the radial direction of the first shell, the drive assembly includes a second shell filled with gas, a spiral thermal wire is provided at the upper end of the interior of the second shell, the upper end of the thermal wire extends to the outside of the second shell and fits the outer wall of the motor housing, a piston is provided inside the second shell, the piston is located below the thermal wire, and the piston A spring is fixedly connected between the bottom and the bottom of the second shell, and a connecting rod is fixedly connected to the lower end surface of the piston. The connecting rod extends to the interior of the first shell and is rotatably connected to the connecting wheel. The guide mechanism includes a first plate body and a second plate body, both of which are annular. The first plate body is rotatably connected to the first shell, and the second plate body is fixedly connected to the first shell. The first plate body has a first through groove and multiple second through grooves, and the connecting wheel is provided in the first through groove. The second plate body has slide grooves distributed in the radial direction, and both sides of the sealing plate have protrusions that match the second through groove and the slide groove respectively. The tube body assembly includes multiple heat dissipation pipes fixed to the outer wall of the motor housing, and the outer side of the heat dissipation pipe has multiple circular heat dissipation holes.

2. The tough ductile iron motor base for subway motors with temperature overload protection according to claim 1, characterized in that: A connecting pipe is provided between two adjacent heat dissipation pipes.

3. The tough ductile iron motor base for subway motors with temperature overload protection according to claim 1, characterized in that: An arc-shaped support rod is fixedly connected to the mounting seat, and the storage tank is fixedly connected to the support rod by bolts.

4. The tough ductile iron motor base for subway motors with temperature overload protection according to claim 1, characterized in that: One end of the storage tank is fixedly connected to a tube body and is provided with a through hole. A semicircular fixed plate and a movable plate are provided inside the tube body. The movable plate is rotatably connected to the tube body, and one side of the movable plate is fixedly connected to a rotating handle located outside the tube body.

5. The tough ductile iron motor base with temperature overload protection for subway motors according to claim 4, characterized in that: The tube body is connected to the first shell through a connector and an air pipe. The end face of the connector is fixedly connected to a disc. The end faces of the tube body and the disc both have annular grooves, and a sealing ring is provided in the groove. The tube body and the disc are fixedly connected by multiple bolts.

Images