Air-cooling and water-cooling mixed heat exchanger of high-voltage motor

Abstract

The utility model relates to the technical field of cooling structures of high-voltage motors, in particular to an air-cooling and water-cooling hybrid heat exchanger of a high-voltage motor, which comprises a heat exchange box body and cooling tubes, the bottom of the heat exchange box body is an open end, the open end is hermetically connected with a radiating surface of the high-voltage motor, and a plurality of groups of parallel cooling tubes are arranged in the heat exchange box body. An outlet in one end of the cooling tube nest is communicated with the atmosphere in an open mode, the heat exchange box body is provided with a cooling air channel at an inlet in the other end of the cooling tube nest, and a shaft end fan in transmission connection with a high-voltage motor is arranged at the inlet of the cooling air channel. The outer wall of the cooling tube nest is in heat conduction connection with a stator of the high-voltage motor, a cooling water pipe coaxial with the cooling tube nest is arranged in the cooling tube nest, and a cooling channel is formed between the outer wall of the cooling water pipe and the inner wall of the cooling tube nest. According to the heat exchanger, cooling liquid is introduced into the cooling water pipes to cool air in the cooling channels, and the situation that the heat exchange effect of the heat exchanger is affected due to the fact that the temperature of the air in the cooling tubes rises after heat exchange is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling structures of high-voltage motors, in particular to an air-cooled and water-cooled mixed heat exchanger for high-voltage motors. Background Art

[0002] In the foundry industry, high-voltage motors are primarily used to drive various heavy machinery and equipment, such as casting machines, die-casting machines, and melting furnaces. These devices typically require high power output and a stable power source to support their operation, and high-voltage motors are precisely able to meet these requirements. Driven by high-voltage motors, casting equipment can achieve more precise control and higher production efficiency. Currently, there are two common cooling methods for high-voltage motors, codenamed IC511 and IC611, with the IC611 cooling method being the most widely used. The basic structure of the IC611 high-voltage motor is a shell-and-tube heat exchanger mounted on the top of the motor, with a centrifugal fan installed at the rear of the main shaft at the non-axial end of the motor. This is connected to the heat exchanger via an air duct, allowing the cooling air blown in by the fan to flow into the shell-and-tube tubes from one end and out from the other end, dispersing into the atmosphere. This part of the air path is generally referred to as the external air path. Inside the motor, a first shaft-end fan and a second shaft-end fan are respectively set on the main shaft outside the two ends of the rotor. The fan type is axial flow, and the wind direction is generally blowing towards the stator to enhance the heat dissipation effect of the motor stator and rotor. The heat dissipation cycle of this part of the motor is generally called the internal air path.

[0003] For example, the existing patent announcement number CN220896464U discloses a self-mixed flow high-voltage motor direct air-cooled heat exchanger, which includes a heat exchange box, cooling tubes, a high-voltage motor and a guide assembly. The bottom of the heat exchange box is provided with an opening, and the bottom opening of the heat exchanger is sealed and connected to the heat dissipation surface of the high-voltage motor. A plurality of groups of cooling tubes are arranged in an array through the upper part of the heat exchange box. The plurality of groups of cooling tubes are arranged in parallel. Both ends of the cooling tubes extend to the outside of the heat exchange box. One end outlet of the cooling tube is open to the atmosphere. Two groups of guide assemblies are installed on the cooling tubes. The heat exchange box is provided with a cooling air duct at the inlet of the other end of the cooling tube. A shaft end fan is provided at the inlet of the cooling air duct, and the shaft end fan is transmission-connected to the high-voltage motor.

[0004] When the aforementioned direct air-cooled heat exchanger for a self-mixed flow high-voltage motor is in use, the hot air inside the motor is conducted through the stator to the cooling tubes, where it exchanges heat with the cooling air within the cooling tubes. However, the heat exchange between the hot air conducted by the stator and the cooling air within the cooling tubes causes the temperature of the air within the cooling tubes to rise, which in turn increases the temperature of the outer walls of the cooling tubes, affecting the effectiveness of the heat exchange between the outer walls of the cooling tubes and the hot air transmitted from the stator. Utility Model Content

[0005] One of the purposes of the utility model is to provide an air-cooled and water-cooled hybrid heat exchanger for a high-voltage motor, aiming to solve the technical problem that in the heat exchanger of the existing high-voltage motor, the air temperature in the cooling tubes increases after the hot air conducted by the stator exchanges heat with the cooling air in the cooling tubes, thereby causing the outer wall temperature of the cooling tubes to increase, thereby affecting the heat exchange between the cooling tubes and the hot air.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a high-voltage motor air-cooled and water-cooled hybrid heat exchanger, including a heat exchange box and a cooling tube, the bottom of the heat exchange box is an open end, the open end is sealed and connected to the heat dissipation surface of the high-voltage motor, a plurality of groups of cooling tubes are arranged in the heat exchange box, the plurality of groups of cooling tubes are parallel to each other, the cooling tubes extend along the axial direction of the output shaft of the high-voltage motor, both ends of the cooling tubes extend to the outside of the heat exchange box, one end outlet of the cooling tube is open to the atmosphere, the heat exchange box is provided with a cooling air duct at the inlet of the other end of the cooling tube, the cooling air duct A shaft-end fan is provided at the inlet, and the shaft-end fan is transmission-connected to the high-voltage motor; the outer wall of the cooling tube is heat-conductingly connected to the stator of the high-voltage motor, and a cooling water pipe is provided in each of the cooling tubes. Both ends of the cooling water pipe extend out of the outside of the heat exchange box, and a cooling channel is formed between the outer wall of the cooling water pipe and the inner wall of the cooling tube. Both ends of the cooling water pipe are respectively connected to a water inlet pipe and a water outlet pipe, both of which are located outside the heat exchange box. The water inlet pipe is used to introduce cooling liquid into the cooling water pipe, and the water outlet pipe discharges the cooling liquid in the cooling water pipe.

[0007] Furthermore, the cooling liquid in the cooling water pipe and the cooling air in the cooling channel flow in the same direction.

[0008] Furthermore, the cooling liquid in the cooling water pipe and the cooling air in the cooling channel flow in opposite directions.

[0009] Furthermore, the outer wall of the cooling tube is thermally connected to the stator of the high-voltage motor via a heat conduction member.

[0010] Furthermore, the inlet of the cooling air duct is connected to a cooling air box located outside the heat exchange box, and the cooling air box is used to cool the air entering the cooling air duct from the atmosphere.

[0011] Furthermore, the cooling bellows includes a bellows body and a cooling assembly, the bellows body is provided with an air inlet and an air outlet, the air outlet is sealed and connected to the inlet of the cooling air duct, the air inlet is connected to the atmosphere, and the cooling assembly is arranged in the bellows body so that the air entering the bellows body can enter the cooling air duct after being cooled by the cooling assembly.

[0012] Furthermore, the cooling assembly includes a cooling coil, which is located between the air inlet and the air outlet. The two ends of the cooling coil are respectively connected to a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are both fixed on the wind box body. The liquid inlet pipe is used to supply cooling water into the cooling coil, and the liquid outlet pipe discharges the cooling water in the liquid inlet pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] During use of the high-voltage motor air-cooled and water-cooled hybrid heat exchanger of the present invention, the heat generated inside the motor is transferred to the outer wall of the cooling tubes through heat conduction. The shaft-end fan is driven to rotate by the drive shaft of the high-voltage motor. The shaft-end fan draws in cold air from outside the heat exchange box. The cold air is blown into the cooling channel through the cooling air duct and then discharged into the atmosphere from the other end of the cooling channel. The cooling air in the cooling channel exchanges heat with the heat transferred from the motor stator to the outer wall of the cooling tubes and the internal hot air flow of the motor, thereby achieving the purpose of cooling the motor. Since the cooling air in the cooling channel exchanges heat with the heat transferred from the motor stator and the internal hot air flow of the motor, the temperature of the cooling air in the cooling channel increases. At this time, the coolant in the cooling water pipe exchanges heat with the cooling air in the cooling channel, reducing the temperature of the cooling air in the cooling channel and accelerating the heat dissipation on the cooling tubes, thereby improving the efficiency of the heat exchange between the cooling air in the cooling channel and the heat transferred from the motor stator to the outer wall of the cooling tubes and the internal hot air flow of the motor, thereby improving the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an air-cooled and water-cooled hybrid heat exchanger for a high-voltage motor according to an embodiment;

[0016] Figure 2 This is a schematic diagram of the structure of the connection between a single cooling tube and a single cooling water pipe in an embodiment;

[0017] Figure 3 for Figure 2 A structural diagram from another angle;

[0018] Figure 4 This is a schematic diagram of the structure of the connection between the cooling water pipe, the water inlet pipe and the water outlet pipe in the embodiment;

[0019] Figure 5 This is a schematic diagram of the structure of the cooling tubes involved in the embodiment;

[0020] Figure 6 for Figure 5 Schematic diagram of the structure;

[0021] Figure 7 This is a schematic diagram of the structure of the cooling coil involved in the embodiment;

[0022] Figure 8 This is a schematic diagram of the structure of the cooling air box involved in the embodiment;

[0023] Figure 9 This is a structural diagram of the air-cooled and water-cooled hybrid heat exchanger for the high-voltage motor in Example 2.

[0024] Reference numerals in the accompanying drawings:

[0025] 1. Heat exchanger housing; 10. Cooling air duct; 2. Motor housing; 20. Output shaft; 21. Stator; 22. Rotor winding; 3. Cooling tubes; 30. Cooling water pipe; 31. Water inlet pipe; 32. Water outlet pipe; 33. Cooling channel; 4. Cooling bellows; 40. Bellows housing; 401. Air inlet; 402. Air outlet; 41. Cooling coil; 5. Shaft-end fan; 6. Liquid inlet pipe; 60. Liquid outlet pipe. DETAILED DESCRIPTION

[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In the description of the present invention, it should be understood that the terms "width", "up", "down", "front", "back", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] Example 1:

[0031] Please refer to Figure 1 - Figure 8 The present invention provides a high-voltage motor air-cooled and water-cooled hybrid heat exchanger, comprising a heat exchange box 1 and cooling tubes 3. The bottom of the heat exchange box 1 is an open end, and the open end of the heat exchange box 1 is sealed with the heat dissipation surface of the high-voltage motor. The heat dissipation surface of the high-voltage motor is the top surface of the motor box 2. Of course, the interior of the motor box 2 is connected to the heat exchange box 1. Multiple groups of cooling tubes 3 are arranged in the heat exchange box 1. The multiple groups of cooling tubes 3 are parallel to each other. The cooling tubes 3 extend along the axial direction of the output shaft 20 of the high-voltage motor. Both ends of the cooling tubes 3 extend to the outside of the heat exchange box 1. One end outlet of the cooling tube 3 is open to the atmosphere. The heat exchange box 1 is provided with a cooling air duct 10 at the inlet of the other end of the cooling tube 3. A shaft-end fan 5 is provided at the inlet of the cooling air duct 10. The shaft-end fan 5 is transmission-connected to the high-voltage motor.

[0032] In addition, the outer wall of the cooling tube 3 is thermally connected to the stator 21 of the high-voltage motor via a heat transfer element (not shown). The heat transfer element can accelerate the transfer of heat from the motor stator 21 to the outer wall of the cooling tube 3. Since the rotor winding 22 of the high-voltage motor is rotatably sleeved within the stator 21, the heat generated by the rotor winding 22 is also transferred to the stator 21. Each cooling tube 3 is provided with a cooling water pipe 30. The cooling water pipe 30 is coaxially arranged with the cooling tube 3. Both ends of the cooling water pipe 30 extend outside the heat exchange housing 1. A cooling channel 33 is formed between the outer wall of the cooling water pipe 30 and the inner wall of the cooling tube 3. The two ends of the cooling water pipe 30 are respectively connected to a water inlet pipe 31 and a water outlet pipe 32, both located outside the heat exchange housing 1. The water inlet pipe 31 is used to introduce cooling liquid into the cooling water pipe 30, and the water outlet pipe 32 is used to discharge the cooling liquid from the cooling water pipe 30.

[0033] In summary, it can be seen that during the use of the high-voltage motor air-cooled and water-cooled hybrid heat exchanger of the present invention, the heat generated inside the motor is transferred to the outer wall of the cooling tube 3 through heat conduction, and the shaft-end fan 5 is driven to rotate by the transmission shaft of the high-voltage motor. The shaft-end fan 5 sucks in the cold air outside the heat exchange box 1, and the cold air is blown into the cooling channel 33 through the cooling air duct 10, and then discharged into the atmosphere from the other end of the cooling channel 33. The cooling air in the cooling channel 33 exchanges heat with the heat transferred from the motor stator 21 to the outer wall of the cooling tube 3 and the internal hot air flow of the motor, thereby achieving the purpose of cooling the motor. Because the cooling air in the cooling channel 33 exchanges heat with the heat conducted by the motor stator 21 and the internal hot air flow of the motor, the temperature of the cooling air in the cooling channel 33 increases. At this time, the coolant in the cooling water pipe 30 exchanges heat with the cooling air in the cooling channel 33, thereby reducing the temperature of the cooling air in the cooling channel 33 and accelerating the dissipation of heat on the cooling tube 3, thereby improving the efficiency of heat exchange between the cooling air in the cooling channel 33 and the heat conducted by the motor stator 21 to the outer wall of the cooling tube 3 and the internal hot air flow of the motor, thereby improving the heat exchange effect.

[0034] In this embodiment, the cooling liquid in the cooling water pipe 30 and the cooling air in the cooling channel 33 flow in the same direction, so that the cooling liquid in the cooling water pipe 30 and the cooling air in the cooling channel 33 can flow in the same direction. When the cooling air in the cooling channel 33 exchanges heat with the hot air flow inside the motor, the cooling liquid in the cooling water pipe 30 also exchanges heat with the cooling air in the cooling channel 33, so that the cooling liquid in the cooling water pipe 30 can exchange heat with the cooling air in the cooling channel 33 in a timely manner, avoiding affecting the heat exchange efficiency.

[0035] For example, in the middle position of the cooling channel 33, the temperature of the cooling air is 8°C. After the cooling air at 8°C exchanges heat with the hot air flow inside the motor, assuming that the temperature of the cooling air becomes 25°C, at this time, the cooling liquid in the cooling water pipe 30 exchanges heat with the cooling air with a temperature of 25°C, so that the cooling air becomes 8°C, achieving timely heat exchange with the cooling air in the cooling channel 33, thereby improving heat exchange efficiency.

[0036] Based on the above structure, refer to Figure 1 、 Figure 7 and Figure 8 The entrance of the cooling air duct 10 is connected to a cooling air box 4 located outside the heat exchange box 1. The cooling air box 4 is used to cool the air entering the cooling air duct 10 from the atmosphere. In this way, the air entering the cooling air duct 10 can be cooled air rather than air directly adsorbed from the atmosphere, thereby further improving the heat exchange effect.

[0037] Specifically, the cooling air box 4 includes an air box body 40 and a cooling assembly. The air box body 40 is provided with an air inlet 401 and an air outlet 402. The air outlet 402 is in sealed communication with the inlet of the cooling air duct 10, and the air inlet 401 is in communication with the atmosphere. The cooling assembly is disposed within the air box body 40 so that the air entering the air box body 40 can be cooled by the cooling assembly before entering the cooling air duct 10. Furthermore, the cooling assembly includes a cooling coil 41, which is located between the air inlet 401 and the air outlet 402. Both ends of the cooling coil 41 are connected to a liquid inlet pipe 6 and a liquid outlet pipe 61 extending out of the air box body 40. Both the liquid inlet pipe 6 and the liquid outlet pipe 61 are fixed to the air box body 40. The liquid inlet pipe 6 is used to supply cooling water to the cooling coil 41, and the liquid outlet pipe 61 discharges the cooling water in the liquid inlet pipe. It can be seen from this that under the action of the shaft end fan 5, the air in the atmosphere enters the wind box body 40 from the air inlet 401, exchanges heat with the cooling water in the cooling coil 41, and then enters the cooling air duct 10, then enters the cooling channel 33 to exchange heat with the hot air flow inside the motor, and finally is discharged from the outlet end of the cooling channel 33, thus circulating.

[0038] Example 2

[0039] The difference between this embodiment and the first embodiment is that the flow directions of the cooling liquid in the cooling water pipe 30 and the cooling air in the cooling channel 33 are different.

[0040] Reference Figure 9 Since the cooling air in the cooling channel 33 exchanges heat with the hot air flow inside the motor, the outlet temperature of the cooling air in the cooling channel 33 is the highest. Therefore, the cooling liquid in the cooling water pipe 30 and the cooling air in the cooling channel 33 are directed in opposite directions. In this way, the cooling liquid in the cooling water pipe 30 can first cool the cooling air at the outlet end of the cooling channel 33, thereby balancing the temperatures at the opposite ends of the outer wall of the cooling tube 3 to a certain extent and improving the heat exchange effect.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-voltage motor air-cooled and water-cooled hybrid heat exchanger, comprising a heat exchange box and cooling tubes, the bottom of the heat exchange box being an open end, the open end being sealed and connected to the heat dissipation surface of the high-voltage motor, a plurality of groups of cooling tubes parallel to each other are arranged in the heat exchange box, each cooling tube extends along the axial direction of the output shaft of the high-voltage motor, both ends of the cooling tube extend to the outside of the heat exchange box, one end outlet of the cooling tube is open to the atmosphere, the heat exchange box is provided with a cooling air duct at the inlet of the other end of the cooling tube, a shaft-end fan is provided at the inlet of the cooling air duct, and the shaft-end fan is drivingly connected to the high-voltage motor; characterized in that The outer wall of the cooling tube is heat-conductingly connected to the stator of the high-voltage motor. A cooling water pipe is provided in each cooling tube. Both ends of the cooling water pipe extend out of the heat exchange box. A cooling channel is formed between the outer wall of the cooling water pipe and the inner wall of the cooling tube. Both ends of the cooling water pipe are respectively connected to a water inlet pipe and a water outlet pipe, both of which are located outside the heat exchange box. The water inlet pipe is used to supply cooling liquid into the cooling water pipe, and the water outlet pipe discharges the cooling liquid in the cooling water pipe.

2. The high-voltage motor air-cooled and water-cooled hybrid heat exchanger according to claim 1 is characterized in that: The cooling liquid in the cooling water pipe and the cooling air in the cooling channel flow in the same direction.

3. The high-voltage motor air-cooled and water-cooled hybrid heat exchanger according to claim 1, characterized in that: The cooling liquid in the cooling water pipe and the cooling air in the cooling channel flow in opposite directions.

4. The high-voltage motor air-cooled and water-cooled hybrid heat exchanger according to claim 1, characterized in that: The outer wall of the cooling tube is connected to the stator of the high-voltage motor through a heat conduction member.

5. The high-voltage motor air-cooled and water-cooled hybrid heat exchanger according to claim 1, characterized in that: The inlet of the cooling air duct is connected to a cooling air box located outside the heat exchange box body, and the cooling air box is used to cool the air entering the cooling air duct from the atmosphere.

6. The high-voltage motor air-cooled and water-cooled hybrid heat exchanger according to claim 5, characterized in that: The cooling bellows includes a bellows body and a cooling assembly. The bellows body is provided with an air inlet and an air outlet. The air outlet is sealed and connected to the inlet of the cooling air duct, and the air inlet is connected to the atmosphere. The cooling assembly is arranged in the bellows body so that the air entering the bellows body can be cooled by the cooling assembly and then enter the cooling air duct.

7. The high-voltage motor air-cooled and water-cooled hybrid heat exchanger according to claim 6, characterized in that: The cooling assembly includes a cooling coil, which is located between the air inlet and the air outlet. The two ends of the cooling coil are respectively connected to a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are both fixed on the wind box body. The liquid inlet pipe is used to supply cooling water into the cooling coil, and the liquid outlet pipe discharges the cooling water in the liquid inlet pipe.

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