Wind-gathering temperature-difference self-powered hydro-generator stator temperature measuring device

Abstract

The utility model belongs to the field of energy collection, and particularly relates to a wind-gathering temperature-difference self-powered hydro-generator stator temperature measuring device which comprises a wind guide part, a wind gathering cover and a temperature-difference self-powered temperature measuring module, the wind guide part is located in the lower end of a stator winding of a hydro-generator set, the outer side of the bottom end of the wind guide part is connected with the wind gathering cover, and the temperature-difference self-powered temperature measuring module is connected with the wind gathering cover. And a temperature difference self-powered temperature measurement module is arranged at the upper part of the wind gathering cover. According to the utility model, the air guide part guides air generated by high-speed rotation of the rotor of the hydro-generator to the air outlet with the chamfer through the upper and lower spiral air guide blades, and according to the fluid continuity theorem, when the fluid flows through the channel with the smaller cross-sectional area, the flow speed is higher, and the fluid is accelerated by the spiral streamline structure and enters the air gathering cover; under air cooling forced convection heat dissipation, the cold end and the hot end of the temperature difference self-powered temperature measurement module accumulate enough temperature difference to supply energy to each electric appliance without external circuit power supply.

Description

Technical Field

[0001] This application belongs to the field of energy harvesting, and particularly relates to a stator temperature measurement device for a water turbine generator powered by wind and temperature difference. Background Art

[0002] During the operation of a water turbine generator set, if maintenance is not timely or human operation is not standardized, etc., it is easy to cause the temperature of the stator to rise abnormally. If the generator operates at a high temperature for a long time, resulting in too high a temperature in the pit, it will affect the insulation of the unit, and may also cause the aging or even damage of the automatic components of the unit. This will not only affect the safe and reliable operation of the water turbine generator set, but also bring very serious safety hazards. Therefore, it is necessary to monitor the temperature of specific positions of the stator winding of the water turbine generator in real time.

[0003] Currently, there are mainly two methods and devices for measuring the stator temperature of a water turbine generator. One is to use fiber optic temperature sensors or thermistors for fixed-point temperature measurement. Fiber optic temperature sensors need to lay cables at each point (such as Chinese Patent Authorization No.: CN218829503U, Chinese Patent Authorization No.: CN218724852U), which increases the labor cost of later inspection and maintenance. Most conventional thermistor temperature measurement methods require pre-burying temperature measurement resistors in the stator (such as Chinese Patent Authorization No.: CN205027460U, Chinese Patent Authorization No.: CN211630028U). These two types of temperature measurement elements inevitably require cables to supply power to the temperature measurement elements. Under the long-term vibration influence of the water turbine generator, it is extremely easy for the wiring of the temperature measurement elements to become loose, resulting in temperature measurement failures. The other is a non-contact live temperature measurement method using infrared or radio frequency technology (such as Chinese Patent Authorization No.: CN201322650, Chinese Patent Authorization No.: CN 211783909 U). This remote temperature measurement technology can measure the temperature outside the water turbine, which is convenient for timely inspection and maintenance of the cables. However, at the same time, due to the continuous rotation of the water turbine rotor, both radio frequency and infrared technologies measure the temperature of certain points periodically, and the temperature of specific points may not be monitored in time.

[0004] The above stator temperature measurement devices for water turbine generators all have their own limitations. Either they need to lay wires inside the water turbine generator, which is inconvenient for inspection and maintenance, has a high labor cost, and there is a risk of loose wiring, or fixed-point temperature measurement cannot be continuous, is not accurate enough, and there is a problem that special points cannot be measured. At the same time, there is a lot of environmental waste heat around the stator winding in the water turbine generator that has not been utilized. Summary of the Invention

[0005] In order to overcome the problems of high labor cost for wiring maintenance, inaccurate temperature measurement at specific points, and insufficient utilization of environmental waste heat during the existing stator temperature monitoring of hydro-generators, a stator temperature measurement device for hydro-generators with self-power generation by wind-induced temperature difference is now proposed.

[0006] To achieve the above technical effects, the solution of this application is as follows:

[0007] A stator temperature measurement device for hydro-generators with self-power generation by wind-induced temperature difference, comprising a wind guiding part, a wind collecting cover, and a temperature difference self-power generation temperature measurement module. The wind guiding part is located inside the lower end of the stator winding of the hydro-generator set. The outer side of the bottom end of the wind guiding part is connected to the wind collecting cover, and the temperature difference self-power generation temperature measurement module is arranged on the upper part of the wind collecting cover.

[0008] Further, the temperature difference self-power generation temperature measurement module is one, two, or more.

[0009] Further, the wind guiding part includes upper wind guiding vanes located at the upper part, lower wind guiding vanes located at the lower part, and an air outlet. Both the upper wind guiding vanes and the lower wind guiding vanes are spiral vanes. The air outlet is located at the bottom end of the wind guiding part and is used to transfer the wind guided from the hydro-generator into the wind collecting cover.

[0010] Further, the wind collecting cover includes an upper heat dissipation part, heat dissipation fins, and a lower air supply part located at the upper part. Heat dissipation fins are arranged on the inner sides of the upper heat dissipation part and the lower air supply part. The upper heat dissipation part is the heat dissipation part in contact with the cold end of the temperature difference self-power generation temperature measurement module. The heat dissipation fins are structures for forced convection heat transfer with air. The lower air supply part sends the excess air to the upper heat dissipation part.

[0011] Further, the temperature difference self-power generation temperature measurement module includes a box body. The upper end and the lower end of the box body are the cold end and the hot end respectively. A connector socket is arranged on the side surface of the box body. A thermocouple is arranged outside the hot end. An electric energy management and wireless communication chip and a thermoelectric generation module are installed inside the box body. The thermoelectric generation module includes thermoelectric generation chips. The bottom of the thermoelectric generation chips is connected to a radiator, and the radiator is fixed on the inner wall of the box body.

[0012] Further, the included angle between the upper wind guiding vanes and the horizontal plane is 15° - 30°, the included angle between the lower wind guiding vanes and the horizontal plane is 45° - 60°. The air outlet is a through hole arranged in a circumferential array along the inner wall of the bottom end of the wind guiding part. There is a chamfer at the entrance, and spiral streamline-shaped grooves are opened on the inner wall of the through hole.

[0013] Further, an annular gap is arranged on the outermost side of the wind collecting cover. The upper end of the upper heat dissipation part is a horizontal plane and is closely attached to the cold end of the temperature difference self-power generation temperature measurement module. The outer side of the inner side of the upper heat dissipation part is a sloping structure. The cross-section of the lower air supply part is inclined upward. The heat dissipation fins are a three-layer fin-type heat dissipation structure arranged in a circumferential array, and the included angle between the heat dissipation fins and the horizontal plane increases layer by layer outward.

[0014] Furthermore, the hot end of the temperature difference self-powered temperature measurement module is made of metal material. There are arc-shaped grooves on one surface of the hot end and 4 positioning holes at both ends. There are linear array rectangular grooves on one surface of the cold end. The box body is made of non-metal material, and a thermocouple, a power management and a wireless communication chip and a thermoelectric power generation module are arranged inside the box body, which are located between the cold end and the hot end.

[0015] Furthermore, the thermocouple is closely attached to the arc-shaped groove of the hot end, the thermoelectric power generation module is closely attached to the same-side hot end plane, and the power management and wireless communication chip are connected to the cold end.

[0016] Furthermore, thermal conductive silicone grease is used to eliminate air gaps and bond between the thermocouple and the arc-shaped groove of the hot end, between the thermoelectric power generation module and the same-side plane of the hot end, and between the upper side of the thermoelectric power generation chip and the radiator.

[0017] The utility model has the following beneficial effects:

[0018] 1. In the utility model, the air guiding part guides the wind generated by the high-speed rotation of the rotor of the water turbine generator through the upper and lower spiral air guiding vanes to the air outlet with chamfers. According to the fluid continuity theorem, when the fluid flows through a channel with a smaller cross-sectional area, the flow velocity is larger and it enters the air collecting cover through the spiral streamline structure and is accelerated; in order to reduce the influence of uneven heat dissipation caused by the air velocity gradient (that is, good heat dissipation at the inlet and poor heat dissipation at the outlet), the upper and lower parts of the air collecting cover are provided with heat dissipation fins with gradually increasing angles with the horizontal plane, so that the wind stays at the outlet for a longer time than at the inlet; under the forced air convection heat dissipation, sufficient temperature difference will be accumulated between the hot and cold ends of the temperature difference self-powered temperature measurement module to supply energy to each electrical appliance without external circuit power supply.

[0019] 2. The air flows from top to bottom in the water turbine generator, forms a rotating wind field through the upper and lower air guiding vanes in the air guiding part and enters the air collecting cover through the spiral streamline structure at the air outlet. The lower air supply part sends the excess air to the upper heat dissipation part to strengthen heat dissipation to increase the temperature difference between the hot and cold ends of the temperature difference self-powered temperature measurement module; the thermoelectric power generation module converts the temperature difference heat energy into electrical energy, which is regulated by the power management and wireless communication chip and then supplies power to each electrical appliance. At the same time, the temperature signal collected by the thermocouple is sent to the user background through the power management and wireless communication chip for real-time monitoring. The structure of the stator temperature measurement device of the water turbine generator with air collecting temperature difference self-power supply of the utility model is simple, without additional external wiring, can effectively utilize the environmental waste heat around the stator winding of the water turbine generator, reduce the labor cost of wiring, and achieve accurate temperature measurement at any point. Description of the Drawings

[0020] Figure 1 It is a cross-sectional view of the installation position relationship between the utility model and the water turbine generator.

[0021] Figure 2 This is a cross-sectional view of the present utility model.

[0022] Figure 3 This is a partial enlarged view of the air outlet, air gathering hood and temperature difference self-powered temperature measurement module of the present utility model.

[0023] Figure 4 This is an axonometric view of the temperature difference self-powered temperature measurement module of the present utility model.

[0024] Figure 5 This is a top view of the temperature difference self-powered temperature measurement module of the present utility model after removing the box cover.

[0025] Figure 6 is Figure 5 the A-A cross-sectional view of

[0026] Figures 7-8 This is an installation relationship diagram of the temperature difference self-powered temperature measurement module and the stator winding of the present utility model.

[0027] In the drawings: 301 - air guiding part, 311 - upper air guiding vane, 312 - air outlet, 313 - lower air guiding vane, 302 - air gathering hood, 321 - upper heat dissipation part, 322 - heat dissipation fins, 323 - lower air supply part, 303 - temperature difference self-powered temperature measurement module, 331 - cold end, 332 - connector socket, 333 - box body, 334 - hot end, 335 - thermocouple, 336 - power management and wireless communication chip, 337 - temperature difference power generation module, 371 - radiator, 372 - temperature difference power generation chip. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0030] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0033] Embodiment 1

[0034] As shown in the figure, a stator temperature measurement device 3 for a wind-accumulating temperature difference self-powered water turbine generator includes a wind guiding part 301, a wind-accumulating cover 302, and a temperature difference self-powered temperature measurement module 303. The wind guiding part 301 is located inside the lower end of the stator winding 1 of the water turbine generator set. The outer side of the bottom end of the wind guiding part 301 is connected to the wind-accumulating cover 302, and the temperature difference self-powered temperature measurement module 303 is arranged on the upper part of the wind-accumulating cover 302.

[0035] The temperature difference self-powered temperature measurement module 303 is one, two, or more.

[0036] The wind guiding part 301 includes an upper wind guiding vane 311 located in the upper part, a lower wind guiding vane 313 located in the lower part, and an air outlet 312. Both the upper wind guiding vane 311 and the lower wind guiding vane 313 are spiral vanes. The air outlet 312 is located at the bottom end of the wind guiding part 301 and is used to transfer the wind guided from the water turbine generator into the wind-accumulating cover 302.

[0037] The wind-accumulating cover 302 includes an upper heat dissipation part 321, heat dissipation fins 322, and a lower air supply part 323. Heat dissipation fins 322 are arranged on the inner sides of the upper heat dissipation part 321 and the lower air supply part 323. The upper heat dissipation part 321 is the main heat dissipation part in contact with the cold end 331 of the temperature difference self-powered temperature measurement module 303. The heat dissipation fins 322 are the main structure for forced convection heat transfer with air. The lower air supply part 323 sends as much redundant air as possible to the upper heat dissipation part 321.

[0038] The temperature difference self-powered temperature measurement module 303 includes a box body 333. The upper end and the lower end of the box body 333 are respectively a cold end 331 and a hot end 334. A connector socket 332 is arranged on the side surface of the box body 333. A thermocouple 335 is arranged outside the hot end 334. An electric energy management and wireless communication chip 336 and a thermoelectric generation module 337 are installed inside the box body 333. The thermoelectric generation module 337 includes a thermoelectric generation chip 372. A radiator 371 is connected to the bottom of the thermoelectric generation chip 372. The radiator 371 is fixed on the inner wall of the box body 333. The connector socket 332 is located on the side surface of the box body 333 to output the redundant electric energy to supply other sensing or wireless communication devices.

[0039] The upper air guiding blade 311 forms an angle of 15° - 30° with the horizontal plane, mainly playing a role in guiding the wind coming from above. The lower air guiding blade 313 forms an angle of 45° - 60° with the horizontal plane, mainly guiding the wind coming from the upper air guiding blade 311 into the air outlet 312. The air outlet 312 is a through hole arranged in a circumferential array along the inner wall of the bottom end of the air guiding part 301. There is a chamfer at the entrance, and spiral streamline-shaped grooves are opened on the inner wall of the through hole.

[0040] An annular gap is arranged on the outermost side of the wind gathering cover 302 to achieve the purpose of wind leakage. The upper end of the upper heat dissipation part 321 is a horizontal plane and is closely attached to the cold end 331 of the temperature difference self-powered temperature measurement module 303. The outer side of the inner side of the upper heat dissipation part 321 is a slope-shaped structure to facilitate wind leakage. The cross section of the lower air supply part 323 is inclined upward, sending the wind entering the lower part of the wind gathering cover 302 to the upper heat dissipation part 321. The heat dissipation fins 322 are a three-layer fin-type heat dissipation structure arranged in a circumferential array. The angle between the heat dissipation fins 322 and the horizontal plane increases layer by layer outward.

[0041] The hot end 334 of the temperature difference self-powered temperature measurement module 303 is made of a metal material with a relatively high thermal conductivity and good mechanical strength (such as copper, etc.). There are arc-shaped grooves on one side surface of the hot end 334 and 4 positioning holes are arranged at both ends. There are linear array rectangular grooves on one side surface of the cold end 331 to increase the heat dissipation area. The box body 333 is made of a non-metallic material with a relatively low thermal conductivity. A thermocouple 335, an electric energy management and wireless communication chip 336 and a thermoelectric generation module 337 are arranged inside the box body 333, located between the cold end 331 and the hot end 334.

[0042] The thermocouple 335 is closely attached to the arc-shaped groove of the hot end 334. The thermoelectric generation module 337 is closely attached to the plane of the hot end 334 on the same side. The electric energy management and wireless communication chip 336 is connected to the cold end 331.

[0043] Thermal conductive silicone grease is used between the thermocouple 335 and the arc-shaped groove of the hot end 334, between the thermoelectric generation module 337 and the plane on the same side of the hot end 334, and between the upper side of the thermoelectric generation chip 372 and the radiator 371 to eliminate air gaps and bond.

[0044] In the present utility model, the air guiding part 301 guides the wind generated by the high-speed rotation of the rotor of the hydrogenerator through the upper and lower spiral air guiding vanes to the air outlet 312 with chamfers. According to the fluid continuity theorem, when the fluid flows through a channel with a smaller cross-sectional area, the flow velocity is larger, and it enters the air collecting cover 302 after being accelerated through the spiral streamline structure; in order to reduce the influence of uneven heat dissipation caused by the air velocity gradient (that is, good heat dissipation at the inlet and poor heat dissipation at the outlet), the upper and lower parts of the air collecting cover 302 are provided with heat dissipation fins 322 with gradually increasing angles with the horizontal plane, so that the wind stays at the outlet for a longer time than at the inlet; under the forced convection heat dissipation of air cooling, the hot and cold ends of the temperature difference self-powered temperature measurement module 303 will accumulate enough temperature difference to supply energy to each electrical appliance without external circuit power supply.

[0045] The air flows downward in the hydrogenerator, forms a rotating wind field through the upper and lower air guiding vanes 313 in the air guiding part 301, and enters the air collecting cover 302 through the spiral streamline structure of the air outlet 312. The lower air supply part 323 sends the redundant air to the upper heat dissipation part 321 to strengthen heat dissipation to increase the temperature difference between the hot and cold ends of the temperature difference self-powered temperature measurement module 303; the thermoelectric generation module 337 converts the temperature difference heat energy into electrical energy, and after being regulated by the power management and wireless communication chip 336, it supplies power to each electrical appliance. At the same time, the temperature signal collected by the thermocouple 335 is sent to the user background through the power management and wireless communication chip 336 for real-time monitoring. The structure of the stator temperature measurement device 3 of the hydrogenerator with air collecting and temperature difference self-power supply involved in the present utility model is simple, without additional external wiring, can effectively utilize the environmental waste heat around the stator winding 1 of the hydrogenerator, reduce the labor cost of wiring, and achieve accurate temperature measurement at any point.

[0046] Embodiment 2

[0047] Please refer to Figures 1-8 As shown in the figure, the present utility model provides a stator temperature measurement device 3 of a hydrogenerator with air collecting and temperature difference self-power supply, including an air guiding part 301, an air collecting cover 302, and a temperature difference self-powered temperature measurement module 303. The air guiding part 301 is inside the lower end of the stator winding 1 of the hydrogenerator set. The outside of the air outlet 312 at the bottom end of the air guiding part 301 is connected to the air collecting cover 302. The upper heat dissipation part 321 is closely attached to the cold end 331, and the hot end 334 is closely attached to the bottom of the stator winding 1. The stator core 4 is around the stator winding 1. The entire stator temperature measurement device 3 of the hydrogenerator with air collecting and temperature difference self-power supply is stably fixed at the lower end of the stator winding 1 by relying on the connection with the hydrogenerator frame 2.

[0048] Please refer to Figures 2-3, both the upper air guiding vane 311 and the lower air guiding vane 313 are spiral vanes. The angle between the upper air guiding vane 311 and the horizontal plane is relatively small, mainly playing the role of guiding the wind coming from above. The angle between the lower air guiding vane 313 and the horizontal plane is relatively large. The spiral vanes can change the linear motion of the air fluid in the air guiding part 301 into spiral flow, generating a secondary turbulent flow perpendicular to the mainstream direction, enhancing the mixing between the fluids in the air guiding part 301, and generating a disturbance mainly characterized by rotation and periodic fluid separation and mixing, so that most of the wind becomes a rotating wind field in the air guiding part 301 under the condition of less energy loss, thus guiding more of the wind coming from the upper air guiding vane 311 to the air outlet 312; the air outlet 312 is a through hole circumferentially arranged along the inner wall of the bottom end of the air guiding part 301, with a chamfer at the entrance, and spiral streamline-shaped grooves are opened on the inner wall of the through hole. Due to the special hole wall shape in the spiral hole, a longitudinal vortex is induced, and its vortex intensity can be 4 orders of magnitude higher than that of a general through hole and does not decay with the increase of the flow distance. The fluid between the spiral holes mainly flows longitudinally. Compared with a general round hole, the cooperative performance between the fluid velocity field and the pressure field is better, the flow direction is more consistent with the driving force direction, and the flow resistance is significantly reduced. At the same time, according to the fluid continuity theorem, the fluid velocity is larger when flowing through a channel with a smaller cross-sectional area. Therefore, the wind coming from the lower air guiding vane 313 will accelerate through the air outlet 312 and enter the air collecting cover 302.

[0049] Please refer to Figure 3 , the outermost side of the air collecting cover 302 is an annular gap for the purpose of air leakage. The inner side of the upper heat dissipation part 321 is a ramp-shaped structure for facilitating air leakage. The upper heat dissipation part 321 is the main heat dissipation part in contact with the cold end 331 of the temperature difference self-powered temperature measurement module 303. The heat dissipation fins 322 are the main structure for forced convection heat transfer with the flowing air. The cross-section of the lower air supply part 323 is inclined upward, sending as much redundant air as possible to the upper heat dissipation part 321 to enhance heat transfer. In forced convection heat transfer, the convective heat transfer coefficient h is positively correlated with the fluid velocity. Therefore, the flowing air accelerated from the air outlet 312 due to the spiral structure and small cross-sectional area will greatly enhance the heat transfer performance between the upper heat dissipation part 321 and the cold end 331; at the same time, in order to reduce the influence of uneven heat dissipation caused by the air velocity gradient (that is, good heat dissipation at the entrance and poor heat dissipation at the exit), three layers of circumferentially arranged heat dissipation fins 322 with gradually increasing angles with the horizontal plane are provided on the upper and lower parts of the air collecting cover 302, so that the wind stays at the outlet for a longer time than at the entrance.

[0050] Please refer to Figures 4-6, the hot end 334 is made of a metal material with a relatively high thermal conductivity and good mechanical strength (such as copper, etc.). There are arc-shaped grooves on one side surface of the hot end 334 for connecting with the thermocouple 335, and 4 positioning holes are provided at both ends for facilitating connection with the stator winding 1 of the hydrogenerator; on one side surface of the cold end 331, there are linear array rectangular grooves to increase the heat dissipation area and connect with the top horizontal plane of the upper heat dissipation part 321; the box body 333 is a non-metal with a relatively low thermal conductivity and is located between the cold end 331 and the hot end 334. There is an aviation connector socket 332 on the side surface of the box body 333, which can output the excess electric energy generated by thermoelectric power generation to supply other electrical appliances; inside the box body 333, the thermocouple 335 is closely attached to the arc-shaped groove of the hot end 334, the thermoelectric power generation module 337 is closely attached to the plane of the hot end 334 on the same side, and the power management and wireless communication chip 336 is connected to the cold end 331; the thermoelectric power generation module 337 includes a heat sink 371 and a thermoelectric power generation chip 372. The upper side of the thermoelectric power generation chip 372 is closely attached to the heat sink 371, and the lower side is closely attached to the hot end 334. The thermoelectric power generation chip 372 is the main power generation component of the thermoelectric self-powered temperature measurement module 303. Using the special properties of thermoelectric materials, according to the Seebeck principle, in a temperature field with a temperature difference, the carriers in the thermoelectric power generation chip 372 made of thermoelectric materials move from the high-temperature position to the low-temperature position and accumulate at the low-temperature position, thereby forming an electric potential difference within the thermoelectric power generation chip 372. At the same time, a reverse current is generated under the action of the electric potential difference. When the carriers in thermal motion reach dynamic equilibrium with the internal electric field, a stable thermoelectric potential is formed at both ends of the thermoelectric power generation chip 372. The greater the temperature difference between the high-temperature position and the low-temperature position, the greater the corresponding thermoelectric potential generated, thus realizing the conversion of thermal energy into electrical energy for utilization. The generated electrical energy is subjected to voltage stabilization processing by the power management and wireless communication chip 336 and then supplies power to the power management and wireless communication chip 336, the thermocouple 335, and other electrical appliances; to ensure good heat transfer performance between the various components, thermal conductive silicone grease is used to eliminate air gaps and bond between the thermocouple 335 and the arc-shaped groove of the hot end 334, between the thermoelectric power generation module 337 and the plane of the hot end 334 on the same side, and between the upper side of the thermoelectric power generation chip 372 and the heat sink 371. When necessary, appropriate heat insulation coatings can be selected at the joints between the hot end 334 and the box body 333, and between the box body 333 and the cold end 331 to increase the temperature difference between the cold end 331 and the hot end 334.

[0051] The specific implementation steps of the present utility model are as follows:

[0052] Please refer to Figure 7 , Figure 8, in the present utility model, after the air guiding part 301, the air gathering hood 302 and the temperature difference self-powered temperature measuring module 303 are properly connected according to the above installation position relationship and are located at the lower end of the stator winding 1 of the hydrogenerator, the hot end 334 of the temperature difference self-powered temperature measuring module 303 can be installed across two stators under the stator winding 1, that is, the thermoelectric generation chip 372 is exactly opposite to the central position of the stator to utilize its heat energy as much as possible; at the same time, in order to make the temperature measurement accurate, the temperature measurement empirical compensation formula should be obtained through experiments under actual working conditions before formal use to reduce the temperature measurement error.

[0053] In this embodiment, the power management and wireless communication chip 336 mainly uses the ADP5091 power management chip and Lora to respectively realize the power fusion input, power distribution, regulated voltage output of the thermoelectric generation module 337 and wireless communication, and transmit the temperature information collected by the temperature sensor to the user background, so as to facilitate the user to monitor the temperature of the object to be measured in real time.

[0054] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A stator temperature measurement device for a hydrogenerator with self-power generation by wind-accumulated temperature difference, characterized in that: It includes an air guiding part (301), a wind collecting hood (302) and a temperature difference self-powered temperature measuring module (303). The air guiding part (301) is located inside the lower end of the stator winding of the hydro-generator set. The outer side of the bottom end of the air guiding part (301) is connected to the wind collecting hood (302), and the temperature difference self-powered temperature measuring module (303) is arranged on the upper part of the wind collecting hood (302).

2. The stator temperature measuring device of a wind-accumulating temperature difference self-powered water turbine generator according to claim 1, characterized in that: The temperature difference self-powered temperature measuring module (303) is one, two or more.

3. The stator temperature measuring device of a wind-accumulating temperature difference self-powered water turbine generator according to claim 1, characterized in that: The air guiding part (301) includes upper air guiding vanes (311) located in the upper part, lower air guiding vanes (313) located in the lower part and an air outlet (312). Both the upper air guiding vanes (311) and the lower air guiding vanes (313) are spiral vanes. The air outlet (312) is located at the bottom end of the air guiding part (301) and is used to transfer the wind guided from the hydro-generator into the wind collecting hood (302).

4. The stator temperature measuring device of a wind-accumulating temperature difference self-powered water turbine generator according to claim 1, wherein: The wind collecting hood (302) includes an upper heat dissipation part (321), heat dissipation fins (322) and a lower air supply part (323) located in the upper part. The heat dissipation fins (322) are arranged on the inner sides of the upper heat dissipation part (321) and the lower air supply part (323). The upper heat dissipation part (321) is a heat dissipation part in contact with the cold end (331) of the temperature difference self-powered temperature measuring module (303). The heat dissipation fins (322) are structures for forced convection heat transfer with air. The lower air supply part (323) sends the excess air to the upper heat dissipation part (321).

5. The stator temperature measuring device of a wind-accumulating temperature difference self-powered water turbine generator according to claim 1, characterized in that: The temperature difference self-powered temperature measuring module (303) includes a box body (333). The upper end and the lower end of the box body (333) are the cold end (331) and the hot end (334) respectively. A connector socket (332) is arranged on the side of the box body (333). A thermocouple (335) is arranged outside the hot end (334). An electric energy management and wireless communication chip (336) and a thermoelectric generation module (337) are installed inside the box body (333). The thermoelectric generation module (337) includes a thermoelectric generation chip (372). The bottom of the thermoelectric generation chip (372) is connected to a radiator (371), and the radiator (371) is fixed on the inner wall of the box body (333).

6. The stator temperature measuring device of a wind-accumulating temperature difference self-powered water turbine generator according to claim 1, characterized in that: The angle between the upper air guiding vanes (311) and the horizontal plane is 15° - 30°. The angle between the lower air guiding vanes (313) and the horizontal plane is 45° - 60°. The air outlet (312) is a through hole arranged in a circumferential array along the inner wall of the bottom end of the air guiding part (301). There is a chamfer at the entrance, and spiral streamline-shaped grooves are formed on the inner wall of the through hole.

7. The stator temperature measuring device of a wind-accumulating temperature difference self-powered water turbine generator according to claim 1, characterized in that: An annular gap is arranged on the outermost side of the wind collecting hood (302). The upper end of the upper heat dissipation part (321) is a horizontal plane and is in close contact with the cold end (331) of the temperature difference self-powered temperature measuring module (303). The inner side of the upper heat dissipation part (321) is a sloping structure towards the outside. The cross-section of the lower air supply part (323) is inclined upwards. The heat dissipation fins (322) are a three-layer fin-type heat dissipation structure arranged in a circumferential array, and the angle between the heat dissipation fins (322) and the horizontal plane increases layer by layer towards the outside.

8. A stator temperature measuring device for a water turbine generator with self-power generation by wind-accumulated temperature difference according to claim 7, characterized in that: The hot end (334) of the temperature difference self-powered temperature measurement module (303) is made of metal material. There are arc-shaped grooves on one surface of the hot end (334) and 4 positioning holes are provided at both ends. There are linear array rectangular grooves on one surface of the cold end (331). The box body (333) is made of non-metallic material. A thermocouple (335), a power management and wireless communication chip (336) and a thermoelectric power generation module (337) are arranged inside the box body (333), and are located between the cold end (331) and the hot end (334).

9. The stator temperature measuring device of a wind-accumulating temperature difference self-powered water turbine generator according to claim 8, characterized in that: The thermocouple (335) is closely attached to the arc-shaped groove of the hot end (334). The thermoelectric power generation module (337) is closely attached to the plane of the hot end (334) on the same side. The power management and wireless communication chip (336) is connected to the cold end (331).

10. A stator temperature measuring device for a water turbine generator with self-power generation by gathering wind temperature difference according to claim 9, characterized in that: Thermal conductive silicone grease is used to eliminate air gaps and bond between the thermocouple (335) and the arc-shaped groove of the hot end (334), between the thermoelectric power generation module (337) and the plane of the hot end (334) on the same side, and between the upper side of the thermoelectric power generation chip (372) and the radiator (371).

Images