Liquid hydrogen cooling motor casing structure

Abstract

The utility model provides a liquid hydrogen cooling motor casing structure, and particularly relates to the technical field of low-temperature equipment, the liquid hydrogen cooling motor casing structure comprises a casing body, a first outer baffle plate and a second outer baffle plate, a runner groove is formed in the casing body, a plurality of runner baffles distributed in the radial direction of the casing body are arranged in the runner groove and divide the runner groove into bent runners, and the first outer baffle and the second outer baffle are arranged on the outer wall of the casing body; the first outer baffle and the second outer baffle are fixedly connected with the two sides of the machine shell body respectively, a flow channel structure is integrated on the machine shell body, the machine shell body can be directly used as a machine shell of a motor, heat dissipation is carried out on an internal motor structure, an extra cooling structure does not need to be introduced, and the cooling efficiency is improved. And meanwhile, the problem of failure of the winding due to over-low temperature caused by direct contact of liquid hydrogen with the winding in the motor can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to low temperature equipment technical field especially relates to a liquid hydrogen cooling motor casing structure. BACKGROUND

[0002] The heat accumulation and temperature rise will have adverse effects on the performance, efficiency and service life of the motor, therefore, the heat dissipation problem of the motor has been one of the key challenges in the motor design and operation.

[0003] The main ways of motor heat dissipation at present are air cooling, water cooling and oil cooling, and the heat dissipation efficiency of these heat dissipation methods is limited, which cannot meet the heat dissipation demand of high-power permanent magnet motor, and restricts the power of the motor, the existing liquid hydrogen is used to cool the motor, for example, the application number CN112564452A discloses a full superconducting claw pole motor using liquid hydrogen spray cooling, which discloses a structure including a rotor structure, a stator structure, a vacuum heat insulation structure, a superconducting armature winding, a superconducting field winding, a liquid hydrogen spray cooling structure and an axial double-channel magnetic flux circuit, the patent reduces the superconducting cooling difficulty through the superconducting field winding and the superconducting armature winding, the axial double-channel magnetic flux circuit uses superconducting electric excitation to increase the air gap magnetic density, the rotor claw pole magnetic structure is suitable for high-speed operation, and the liquid hydrogen spray cooling fully utilizes the latent heat capacity of liquid hydrogen, so that the cooling structure of the full superconducting motor is compact, and the power density of the motor is improved, but the patent uses liquid hydrogen to directly spray into the motor for heat dissipation, and the extremely low temperature of the liquid hydrogen can cause the failure of the motor winding insulation section, and there is a risk of damaging the motor. SUMMARY

[0004] In order to solve the problem that the motor cooling structure is easy to damage the motor, the utility model provides a liquid hydrogen cooling motor casing structure.

[0005] The utility model discloses a liquid hydrogen cooling motor casing structure through the following technical scheme realizes:

[0006] The utility model discloses liquid hydrogen cooling motor casing structure includes casing body, first outer baffle and second outer baffle, wherein:

[0007] Two flow channel grooves are arranged on the outer wall of the casing body, a plurality of flow channel baffles are arranged in the flow channel grooves and distributed along the radial direction of the casing body, the flow channel grooves are separated into bent flow channels by the plurality of flow channel baffles, the first outer baffle and the second outer baffle are arranged on the outer wall of the casing body, and the first outer baffle and the second outer baffle are fixedly connected to the two sides of the casing body respectively.

[0008] Further, a first hydrogen outlet pipe and a first liquid hydrogen inlet pipe are sequentially arranged at the two ends of the first outer baffle, and a second liquid hydrogen inlet pipe and a second hydrogen outlet pipe are sequentially arranged at the two ends of the second outer baffle.

[0009] Further, the liquid hydrogen in the flow channels of the two flow channel grooves flows in the same direction, either counterclockwise or clockwise, along the outside of the casing body.

[0010] Further, the size of the flow channel in one of the flow channel grooves gradually increases from the side of the first liquid hydrogen inlet pipe to the side of the first hydrogen outlet pipe, and the size of the flow channel in the other flow channel groove gradually increases from the side of the second liquid hydrogen inlet pipe to the side of the second hydrogen outlet pipe.

[0011] Further, the heat exchange fins are also included, and a plurality of the heat exchange fins are arranged between adjacent flow channel baffles.

[0012] Further, the plurality of heat exchange fins are located between the flow channel baffles near the first hydrogen outlet pipe and the second hydrogen outlet pipe in the flow channel groove.

[0013] Further, the two sides of the casing body are also respectively provided with a first end cover interface and a second end cover interface.

[0014] The beneficial effects of the present utility model are as follows:

[0015] (1) The liquid hydrogen cooling motor casing structure of the present utility model integrates the flow channel structure on the casing body, which can directly serve as the casing of the motor and dissipate heat for the internal motor structure, without the need to introduce additional cooling structure, and can also avoid the problem of failure of the winding due to excessively low temperature caused by direct contact of the liquid hydrogen with the internal winding of the motor.

[0016] (2) The flow channel baffles near the liquid hydrogen inlet side in the flow channel groove of the liquid hydrogen cooling motor casing structure of the present utility model are more dense than the flow channel baffles near the hydrogen outlet side, so that the width of the arc-shaped flow channel gradually increases, and the gradually increasing flow channel can avoid the blockage of the working medium and also reduce the flow rate of the expanded hydrogen, thereby ensuring safety.

[0017] (3) The heat exchange fins are arranged in the flow channel groove of the liquid hydrogen cooling motor casing structure of the present utility model, and the liquid hydrogen is vaporized into hydrogen gas after heat exchange, and the heat exchange fins can increase the heat exchange area between the hydrogen gas and the casing body, thereby further improving the cooling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 FIG. 1 is a general structural view of the liquid hydrogen cooling motor casing structure of the present utility model;

[0019] Fig. 2 FIG. 2 is an exploded view of the liquid hydrogen cooling motor casing structure of the present utility model;

[0020] Fig. 3The utility model discloses a liquid hydrogen cooling motor casing structure's section view for the utility model discloses a liquid hydrogen cooling motor casing structure's section view;

[0021] In the drawing: first liquid hydrogen inlet pipe 1, first hydrogen outlet pipe 2, second liquid hydrogen inlet pipe 3, second hydrogen outlet pipe 4, first outer baffle 5, second outer baffle 6, casing body 7, first end cover interface 8, second end cover interface 9, heat exchange fin 10, flow channel baffle 11;

[0022] The utility model discloses a liquid hydrogen cooling motor casing structure's section view for the utility model discloses a liquid hydrogen cooling motor casing structure's section view; Specific implementation

[0023] In order to more clearly complete the technical scheme of the utility model, the utility model will be further explained with reference to the drawings in conjunction with embodiments.

[0024] Please refer to Figs. 1-3 The utility model discloses a liquid hydrogen cooling motor casing structure including casing body 7, first outer baffle 5 and second outer baffle 6, wherein:

[0025] Casing body 7 outer wall is provided with two flow channel grooves, and a plurality of flow channel baffles 11 radially distributed along casing body 7 are arranged in the flow channel grooves, the plurality of flow channel baffles 11 interval the bent flow channel of flow channel groove, and first outer baffle 5 and second outer baffle 6 are arranged on the outer wall of casing body 7, and first outer baffle 5, second outer baffle 6 are fixedly connected with both sides of casing body 7 respectively.

[0026] In the embodiment:

[0027] Flow channel baffle 11 is used for spacing the arcuate flow channel of flow channel groove;

[0028] Flow channel is used for liquid hydrogen heat exchange;

[0029] In specific embodiments, casing body 7 is in the form of a cylinder, and two flow channel grooves are arranged on the outer side of casing body 7, the flow channel baffles 11 in the flow channel grooves divide the flow channel grooves into an arcuate flow channel, liquid hydrogen enters the two arcuate flow channels of casing body 7 through first outer baffle 5 and second outer baffle 6 and cools the motor structure in casing body 7, by integrating the heat dissipation structure on casing body 7, casing body 7 can directly serve as the casing of the motor to dissipate heat for the motor structure inside, without the need to introduce additional cooling structure, and the problem of failure of the winding due to excessively low temperature caused by direct contact of liquid hydrogen with the winding inside the motor can be avoided.

[0030] In one embodiment, the number of flow channel grooves on the casing body 7 can be selected according to actual conditions, and can be three or four. The number of baffles is the same as the number of flow channel grooves, and only one flow channel is arranged in each flow channel groove. Liquid hydrogen enters from one end of the flow channel and exchanges heat, and finally changes into hydrogen gas and flows out from the other end. The shape of the flow channel can also be selected according to actual conditions.

[0031] Further, the two ends of the first outer baffle 5 are sequentially provided with the first hydrogen gas outlet pipe 2 and the first liquid hydrogen inlet pipe 1, and the two ends of the second outer baffle 6 are sequentially provided with the second liquid hydrogen inlet pipe 3 and the second hydrogen gas outlet pipe 4. The liquid hydrogen in the flow channels of the two flow channel grooves flows in the same direction, that is, counterclockwise or clockwise along the outside of the casing body 7.

[0032] In the present embodiment:

[0033] The first hydrogen gas outlet pipe 2 and the second hydrogen gas outlet pipe 4 are used to discharge hydrogen gas.

[0034] The first liquid hydrogen inlet pipe 1 and the second liquid hydrogen inlet pipe 3 are used to introduce liquid hydrogen.

[0035] In a specific embodiment, the first outer baffle 5 and the second outer baffle 6 are both circular arc-shaped, and the structures of the first outer baffle 5 and the second outer baffle 6 are the same. The first outer baffle 5 and the second outer baffle 6 are both arranged and fixed on the outside of the casing body 7, with the liquid hydrogen inlet pipe on the left side and the hydrogen gas outlet pipe on the right side. Liquid hydrogen flows into the first liquid hydrogen inlet and the second liquid hydrogen inlet for heat exchange and vaporization into hydrogen gas, and flows out from the first hydrogen gas outlet and the second hydrogen gas outlet. The liquid hydrogen in the two flow channel grooves flows clockwise or counterclockwise around the outside of the casing body 7, and cools the casing body 7. Through the bidirectional symmetric inlet and outlet cooling medium mode, the temperature uniformity of the entire casing structure and the internal motor can be effectively improved, and the maximum temperature of the structure can be reduced.

[0036] Further, the size of the flow channel in one flow channel groove gradually increases from the side of the first liquid hydrogen inlet pipe 1 to the side of the first hydrogen gas outlet pipe 2, and the size of the flow channel in the other flow channel groove gradually increases from the side of the second liquid hydrogen inlet pipe 3 to the side of the second hydrogen gas outlet pipe 4.

[0037] In a specific embodiment, the flow channel baffles 11 near the liquid hydrogen inlet side in the flow channel groove are more dense than the flow channel baffles 11 near the hydrogen gas outlet side, so that the width of the arc-shaped flow channel gradually increases. After the liquid hydrogen is heat-exchanged and vaporized into hydrogen gas, the volume expands, which may cause the working medium to block the flow channel. The gradually increasing flow channel can avoid the differential pressure from blocking the working medium from entering, and also reduces the flow rate of the expanded hydrogen gas, ensuring safety.

[0038] Further, the heat exchange fins 10 are further included, and a plurality of heat exchange fins 10 are arranged between adjacent flow channel baffles 11; the plurality of heat exchange fins 10 are located between the flow channel baffles 11 close to the first hydrogen outlet pipe 2 and the second hydrogen outlet pipe 4 in the flow channel groove.

[0039] In the embodiment,

[0040] The heat exchange fins 10 are used for strengthening heat exchange;

[0041] In the specific embodiment, the liquid hydrogen is converted into hydrogen gas after heat exchange in the flow channel, and the heat exchange fins 10 can strengthen the heat exchange area between the hydrogen gas and the casing body 7, thereby improving the cooling efficiency.

[0042] Further, the casing body 7 is further provided with a first end cover interface 8 and a second end cover interface 9 on two sides respectively.

[0043] In the specific embodiment, the first end cover interface 8 and the second end cover interface 9 are used for connecting other structures in cooperation with the casing body 7.

[0044] Of course, the utility model can also have other various embodiments, and other embodiments obtained by the ordinary skilled in the art based on the embodiment without any creative labor all belong to the range protected by the utility model.

Claims

1. A liquid hydrogen-cooled motor casing structure, characterized by, The machine cabinet body, the first outer baffle and the second outer baffle are provided. Two flow channel grooves are provided on the outer wall of the machine cabinet body, and a plurality of flow channel baffles are distributed along the radial direction of the machine cabinet body in the flow channel grooves. The first outer baffle and the second outer baffle are provided on the outer wall of the machine cabinet body.

2. The liquid hydrogen-cooled motor casing structure of claim 1, wherein, The first hydrogen outlet pipe and the first liquid hydrogen inlet pipe are sequentially provided at the two ends of the first outer baffle.

3. The liquid hydrogen-cooled motor casing structure of claim 2, wherein, The second liquid hydrogen inlet pipe and the second hydrogen outlet pipe are sequentially provided at the two ends of the second outer baffle.

4. The liquid hydrogen-cooled motor casing structure of claim 3, wherein, The size of the flow channel in one of the flow channel grooves gradually increases from the side of the first liquid hydrogen inlet pipe to the side of the first hydrogen outlet pipe.

5. The liquid hydrogen-cooled motor housing structure of claim 1, wherein, The size of the flow channel in the other flow channel groove gradually increases from the side of the second liquid hydrogen inlet pipe to the side of the second hydrogen outlet pipe. The liquid hydrogen in the flow channels of the two flow channel grooves flows in the same direction along the outer side of the machine cabinet body. Heat exchange fins are further provided. The heat exchange fins are provided between adjacent flow channel baffles. The heat exchange fins are located between the flow channel baffles close to the first hydrogen outlet pipe and the second hydrogen outlet pipe in the flow channel grooves. First and second end cap interfaces are further provided on the two sides of the machine cabinet body.

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