Efficient breeze power generation device suitable for railway locomotive

Abstract

The efficient breeze power generation device comprises a shell, a plurality of mounting supports and a plurality of axial flow power generation fans, a plurality of current collector air guide barrels are arranged on the shell in an array mode, and the axial flow power generation fans are centrally arranged on the inner walls of the current collector air guide barrels through the mounting supports; each axial flow power generation fan comprises an outer stator, an inner rotor and two groups of impellers, the two groups of impellers are respectively arranged at two ends of the inner rotor and are arranged in opposite rotating directions, and each current collector air duct and the corresponding axial flow power generation fan form a small wind power generation unit. The multiple small wind power generation units are arranged in batches, the advantages that the small wind power generation units are small in size and very low in starting torque are fully utilized, power generation can be started under breeze, the power generation time is long, the small wind power generation units are arranged on the shell in an array mode to form a whole, modularization is achieved, and the power generation module is formed; centralized arrangement and synchronous power generation are performed, and electric energy collection and processing are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of locomotive wind energy utilization, and in particular to a high-efficiency breeze power generation device suitable for railway locomotives. Background Art

[0002] At present, the speed of various trains is getting faster and faster, and the wind force generated during driving is getting stronger and stronger with the increase in speed. The wind power generation technology on the surface of the train is a new energy technology that is sustainable and environmentally friendly. It has many advantages, such as being a renewable energy source, not occupying additional land resources, and can be used as an auxiliary power supply to meet the electricity needs of various equipment on the train. It has broad application prospects and application potential.

[0003] In addition, rail freight cars generally use diesel engines and are not powered. They either use a special fuel generator to generate electricity or a locomotive self-generating device to generate electricity, that is, the locomotive wheels drive the locomotive self-generating device to generate electricity. This method will affect the life of the locomotive bearings, so it is not recommended. The advantage of wind power generation is that it can be powered at the same time without affecting the life of the locomotive bearings. For example, the Chinese patent application with publication number CN101879868A discloses an environmentally friendly wind power generation device on the roof of a train. The wind power generation device is arranged in a long strip, with a three-phase AC generator installed at the head and tail, and a coaxial small fan is installed on its rotor shaft at a certain distance. Multiple wind power generation devices are arranged on the roof, and the electricity generated by all generators is connected in parallel to a boost regulator, and then transmitted to the battery or load respectively. It can save energy and reduce consumption, increase revenue and save expenses for railway enterprises, and enable people to enjoy a low-carbon life. This kind of wind power generation device has the technical problems of extremely low utilization of wind energy, large footprint and only being able to generate electricity at higher wind speeds, which needs to be improved. Summary of the invention

[0004] In order to solve the technical problems of low wind energy utilization, large floor space and high wind speed requirements of existing wind power generation devices for railway locomotives, the present invention provides a high-efficiency breeze power generation device suitable for railway locomotives.

[0005] The technical solution provided in the present application is as follows: A high-efficiency breeze power generation device suitable for railway locomotives, comprising a base, a shell, multiple mounting brackets and multiple axial-flow generator fans, the shell being fixedly arranged on the base, the base being used to be fixed on the railway locomotive, a plurality of collector air guides being arrayed on the shell, the axial-flow generator fans being centrally arranged on the inner wall of the collector air guide through the mounting bracket, the axial-flow generator fans comprising an outer stator, an inner rotor and two sets of impellers, the two sets of impellers being respectively arranged at both ends of the inner rotor and arranged in opposite rotation directions, each collector air guide and the corresponding axial-flow generator fan forming a small wind power generation unit.

[0006] By adopting the above technical scheme, the axial flow generator described in this application belongs to a direct-drive permanent magnet generator, which does not need to be provided with a gear transmission mechanism, can reduce transmission loss, improve power generation efficiency, has a low failure rate, and reduces maintenance frequency. This application sets up a plurality of small wind power generation units in batches, which not only fully utilizes the advantages of small wind power generation units with small size and low starting torque, can start power generation under breeze, and have a long power generation time, but also improves the flow efficiency of wind energy and realizes efficient power generation by setting a collector air guide, and sets the array of small wind power generation units on the shell to form a whole, realizes modularization, forms a power generation module, and arranges it centrally, generates power synchronously, and facilitates power collection and processing. The entire power generation module still occupies a small area, and can be arranged at the top, bottom, and both sides of the railway locomotive, etc., which can fully meet the requirements of the appearance and passability of the railway locomotive, and flexibly arranges one or more groups of power generation modules according to the actual available space and power demand to increase the overall power generation, thereby meeting different power generation needs.

[0007] The speed of the locomotive is relatively uniform during operation, the direction is constant, and the wind energy generated is stable and uniform. The present application can operate stably during the operation of the locomotive, generate electricity efficiently, and increase energy reserves for railway locomotives; when the locomotive stops at a station, stops operating, or travels very slowly, the breeze in nature can still drive the small wind power generation unit to generate electricity and maintain a basic low-power supply. In addition, considering the particularity of the two-way travel of the locomotive, impellers are provided at both ends of the axial flow generator fan, and the shapes of the two ends of the collector air guide are also symmetrically designed. No matter which direction the locomotive travels, the axial flow generator fan can generate electricity normally, which can maximize the full use of wind power generation. The two sets of impellers are arranged in opposite directions. The wind drives the wind wheel on the windward side to rotate, and the wind wheel on the leeward side rotates synchronously, which has a suction effect on the wind in the collector air guide, can increase the wind speed, and has a positive acceleration effect on the rotation of the inner rotor. Compared with the axial flow generator fan with a single wind wheel, the power generation efficiency can be further improved.

[0008] Preferably, the impeller has three blades, the angle between a single set of impeller blades is 120°, and the angle between two sets of impeller blades is 60°.

[0009] Preferably, the high-efficiency micro-wind power generation device also includes a control system, a DC center and a battery. The axial flow generator fan, the DC center and the battery are all electrically connected to the control system. The DC center is used to provide working power to the control system. The control system is used to rectify the three-phase output current of the axial flow generator fan and charge the battery. The battery is used to store electrical energy and supply power to the load.

[0010] Preferably, the high-efficiency micro-wind power generation device further comprises an inverter, which is electrically connected to a storage battery and converts direct current of the storage battery into alternating current to provide electrical energy for an AC load on a railway locomotive.

[0011] Preferably, the windward surface of the shell is rectangular, triangular or V-shaped.

[0012] Preferably, the collector air guide cylinder comprises a straight cylinder in the middle and flared cylinders at both ends, the flared cylinders are arc-shaped bell mouths, the mounting bracket is arranged on the inner wall of the straight cylinder, and the two sets of impellers are both located in the straight cylinder.

[0013] Preferably, the mounting bracket comprises a fixing tube and a plurality of connecting arms, wherein the connecting arms are radially arranged on the outer side wall of the fixing tube, and the outer side ends of the connecting arms are arranged on the inner wall of the collector air guide tube.

[0014] Preferably, the connecting arm is in the shape of a plate, and its length extension direction is parallel to the axis of the collector air guide tube, and is used to rectify the wake of the wind wheel on the windward side.

[0015] Preferably, the high-efficiency micro-wind power generation device further comprises a braking device, and the braking device is electrically connected to a control system, and the control system is also used to control the rotation speed of the axial flow power generation fan through the braking device to avoid over-speed rotation.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. The axial flow generator fan described in the present application is a direct-drive permanent magnet generator, which does not require a gear transmission mechanism, can reduce transmission losses, improve power generation efficiency, has a low failure rate, and reduces maintenance frequency.

[0017] 2. This application sets up a number of small wind power generation units in batches, making full use of the advantages of small wind power generation units, which are small in size and have very low starting torque, and can start generating electricity in a breeze. It also sets up a collector wind guide to improve the flow efficiency of wind energy and achieve efficient power generation; 3. The present application sets an array of small wind power generation units on a shell to form a whole, realizes modularization, forms power generation modules, arranges them centrally, generates electricity synchronously, and facilitates the collection and processing of electric energy. One or more groups of power generation modules can be flexibly arranged according to the actual available space and power demand to increase the overall power generation and meet different power generation needs.

[0018] 4. There are impellers at both ends of the axial flow wind turbine. No matter which direction the locomotive travels, the axial flow wind turbine can generate electricity normally, which can maximize the full utilization of wind power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a stereoscopic diagram of the power generation device according to the embodiment of the present application applied to a railway locomotive; Figure 2 is a schematic diagram of the power generation device described in the embodiment of the present application; Figure 3 It is a schematic diagram of the assembly of the housing, the collector air guide tube and the base described in the embodiment of the present application; Figure 4 It is a schematic diagram of the assembly relationship between the collector air guide tube, the axial flow power generation fan, the mounting bracket and the housing according to the embodiment of the present application; Figure 5 is a half-section schematic diagram of a small wind power generation unit according to an embodiment of the present application; Figure 6 is a schematic diagram of the exploded structure of the small wind power generation unit described in the embodiment of the present application; Figure 7 It is a schematic diagram of the exploded structure of the axial flow power generation fan described in the embodiment of the present application.

[0020] Explanation of the reference numerals: 1. base; 2. shell; 3. mounting bracket; 31. fixing cylinder; 32. connecting arm; 4. axial flow fan; 41. outer stator; 42. inner rotor; 43. impeller; 5. collector air guide tube; 51. straight cylinder; 52. flared cylinder; 100. railway locomotive. DETAILED DESCRIPTION

[0021] The following is combined with Figures 1 to 7 This application is described in further detail.

[0022] Reference Figures 1 to 7 The embodiment of the present application discloses a high-efficiency micro-wind power generation device suitable for a railway locomotive, comprising a base 1, a shell 2, a plurality of mounting brackets 3 and a plurality of axial-flow generator fans 4, wherein the shell 2 is fixedly arranged on the base 1, and the base 1 is used to be fixed on a railway locomotive 100, and a plurality of collector air guides 5 are arranged in an array on the shell 2, and the axial-flow generator fans 4 are centrally arranged on the inner wall of the collector air guide 5 through the mounting bracket 3, and the axial-flow generator fans 4 include an outer stator 41, an inner rotor 42 and two groups of impellers 43, and the two groups of impellers 43 are respectively arranged at both ends of the inner rotor 42 and arranged in opposite directions of rotation, or the two groups of impellers 43 have the same shape but are arranged back to back, and each collector air guide 5 and the corresponding axial-flow generator fan 4 form a small wind power generation unit.

[0023] The two groups of impellers 43 are arranged in opposite directions. The wind drives the wind wheel on the windward side to rotate, and the wind wheel on the leeward side rotates synchronously, which has a suction effect on the wind in the collector air guide 5, can increase the wind speed, and has a positive acceleration effect on the rotation of the inner rotor 42. Compared with the axial flow generator fan with a single wind wheel, the power generation efficiency can be further improved.

[0024] Reference Figure 6The impeller 43 has three blades, the angle between the blades of a single group of impellers 43 is 120°, and the angle between the blades of two groups of impellers 43 is 60°, which is equivalent to a staggered arrangement. The effect of such an arrangement is to reduce the influence of the wake of the windward impeller on the rotation of the leeward impeller.

[0025] Reference Figure 1 The high-efficiency breeze power generation device is arranged on the top of the railway locomotive 100. Since the top is large enough, a plurality of groups of high-efficiency breeze power generation devices are arranged in an array in the front and rear directions. The windward surface of the shell 2 is rectangular. In order to enable each group of high-efficiency breeze power generation devices to play a role, it is necessary to control the distance between the front and rear groups. It is best to obtain the optimal range of the distance through fluid simulation calculation to minimize the influence of the front group on the wind force of the rear group and make full use of the wind energy generated by the operation of the railway locomotive 100.

[0026] In the present application, the windward surface of the shell may also be in other shapes, such as a triangle or a V shape, and the shape of the windward surface of the shell may also be obtained by fluid analysis calculation. In particular, when the triangular shells or V-shaped shells are arranged at intervals, the influence of the front group on the wind force of the rear group can be greatly reduced.

[0027] Reference Figure 2 The high-efficiency micro-wind power generation device also includes a control system, a DC center and a battery. The axial-flow power generation fan, the DC center and the battery are all electrically connected to the control system. The DC center is used to provide working power for the control system. The power of the DC center can come from the battery. The control system includes a controller, a rectifier and a photoelectric speed sensor. The photoelectric speed sensor is fixed on the housing and faces the main shaft of the inner rotor to measure the speed of the inner rotor. The rectifier is used to rectify the three-phase output current of the axial-flow power generation fan and charge the battery. The battery is used to store electric energy and supply power to the load. The high-efficiency micro-wind power generation device also includes an inverter. The inverter is electrically connected to the battery. The inverter converts the DC power of the battery into AC power to provide power for the AC load on the railway locomotive.

[0028] Reference Figure 5 and Figure 6 The collector air guide tube 5 includes a straight tube 51 in the middle and a flared tube 52 at both ends. The flared tube 52 is an arc-shaped bell mouth. The mounting bracket 3 is arranged on the inner wall of the straight tube 51. The two sets of impellers 43 are both located in the straight tube 51. The flared tube 52 has a wind collecting effect, and the straight tube 51 has an effect of adjusting the wind direction. The wind blows to the wind wheel on the windward side at a nearly vertical angle to ensure the wind energy conversion efficiency of the wind wheel. The flared tubes 52 are arranged at both ends to adapt to the characteristics of the two-way travel of the railway locomotive.

[0029] Reference Figure 6The mounting bracket 3 includes a fixing tube 31 and a plurality of connecting arms 32. In this embodiment, the number of connecting arms 32 is four. The connecting arms 32 are radially arranged on the outer side wall of the fixing tube 31, and the outer ends of the connecting arms 32 are arranged on the inner wall of the collector air guide tube 5. The number of connecting arms 32 can be adjusted according to needs.

[0030] Reference Figure 5 and Figure 6 The connecting arm 32 is in the shape of a plate, and its length extension direction is parallel to the axis of the collector air guide tube 5, and is used to rectify the wake of the wind wheel on the windward side. Since the wake of the wind wheel on the windward side is a spiral winding wake, it is not conducive to the rotation of the wind wheel on the leeward side. The present application corrects the wake wind to a direct current wind as much as possible by setting a plate-shaped connecting arm 32, so as to facilitate the rotation of the wind wheel on the leeward side. The preferred length of the connecting arm 32 is greater than or equal to half of the distance between the two groups of impellers 43.

[0031] In this embodiment, the high-efficiency micro-wind power generation device further includes a brake device (not shown), which is electrically connected to the control system. A peak power value is preset in the controller in the control system. When the peak power value is reached, the brake device is controlled to work to limit the speed of the axial flow power generation fan to prevent over-speed rotation. When the wind speed passing through the axial flow power generation fan exceeds 35 m / s, the axial flow power generation fan may over-speed and be easily damaged after over-speeding. When the control system detects that the axial flow power generation fan reaches the limit speed, the brake device is activated to turn on the protection function to improve safety.

[0032] The axial flow generator 4 described in the present application belongs to a direct-drive permanent magnet generator, which does not need to be provided with a gear transmission mechanism, can reduce transmission loss, improve power generation efficiency, has a low failure rate, and reduces maintenance frequency. The present application sets up a plurality of small wind power generation units in batches, which not only fully utilizes the advantages of small wind power generation units of small size and low starting torque, can start power generation under light wind, and have a long power generation time, but also improves the flow efficiency of wind energy and realizes efficient power generation by setting a collector air guide 5, and sets the array of small wind power generation units on the housing 2, makes it into a whole, realizes modularization, forms a power generation module, carries out centralized arrangement, generates electricity synchronously, and facilitates power collection and processing, and the entire power generation module still occupies a small area, and can be arranged at various places such as the top, bottom, and both sides of the railway locomotive, which can fully meet the requirements of the appearance and passability of the railway locomotive, and flexibly arranges one or more groups of power generation modules according to the actual available space and power demand to increase the overall power generation, thereby meeting different power generation needs.

[0033] The speed of the locomotive is relatively uniform during operation, the direction is constant, and the wind energy generated is stable and uniform. The present application can operate stably during the operation of the locomotive, generate electricity efficiently, and increase energy reserves for railway locomotives; when the locomotive stops at a station, stops operating, or travels very slowly, the breeze in nature can still drive the small wind power generation unit to generate electricity and maintain a basic low-power supply. In addition, considering the particularity of the two-way travel of the locomotive, both ends of the axial flow generator fan 4 are provided with impellers 43, and the shapes of the two ends of the collector air guide 5 are also symmetrically designed. No matter which direction the locomotive travels, the axial flow generator fan 4 can generate electricity normally, so that the wind energy can be fully utilized to the maximum extent. The present application utilizes a wide range of wind speeds, and can generate electricity at wind speeds between 0.5-35 meters per second. The higher the wind speed, the greater the power generation energy.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-efficiency breeze power generation device suitable for railway locomotives, characterized in that: The invention comprises a base (1), a shell (2), a plurality of mounting brackets (3) and a plurality of axial flow generator fans (4); the shell (2) is fixedly arranged on the base (1); the base (1) is used to be fixed on a railway locomotive (100); a plurality of collector air guide tubes (5) are arranged in an array on the shell (2); the axial flow generator fans (4) are centrally arranged on the inner wall of the collector air guide tube (5) through the mounting brackets (3); the axial flow generator fans (4) comprise an outer stator (41), an inner rotor (42) and two groups of impellers (43); the two groups of impellers (43) are respectively arranged at two ends of the inner rotor (42) and are arranged in opposite rotation directions; each collector air guide tube (5) and the corresponding axial flow generator fan (4) form a small wind power generation unit.

2. The high-efficiency breeze power generation device suitable for railway locomotives according to claim 1, characterized in that: The impeller has three blades, the angle between a single set of impeller blades is 120°, and the angle between two sets of impeller blades is 60°.

3. The high-efficiency breeze power generation device suitable for railway locomotives according to claim 1, characterized in that: The high-efficiency micro-wind power generation device further comprises a control system, a DC center and a storage battery. The axial flow generator fan (4), the DC center and the storage battery are all electrically connected to the control system. The DC center is used to provide working power to the control system. The control system is used to rectify the three-phase output current of the axial flow generator fan (4) and charge the storage battery. The storage battery is used to store electric energy and supply power to the load.

4. The high-efficiency breeze power generation device suitable for railway locomotives according to claim 3 is characterized in that: The high-efficiency micro-wind power generation device also includes an inverter, which is electrically connected to a storage battery. The inverter converts direct current of the storage battery into alternating current to provide electrical energy for an alternating current load on a railway locomotive (100).

5. The high-efficiency breeze power generation device suitable for railway locomotives according to claim 1, characterized in that: The windward surface of the shell (2) is rectangular, triangular or V-shaped.

6. The high-efficiency breeze power generation device suitable for railway locomotives according to claim 1, characterized in that: The collector air guide cylinder (5) comprises a straight cylinder (51) in the middle and flared cylinders (52) at both ends, wherein the flared cylinder (52) is an arc-shaped bell mouth, the mounting bracket (3) is arranged on the inner wall of the straight cylinder (51), and the two sets of impellers are both located in the straight cylinder (51).

7. The high-efficiency breeze power generation device suitable for railway locomotives according to claim 6, characterized in that: The mounting bracket (3) comprises a fixing tube (31) and a plurality of connecting arms (32), wherein the connecting arms (32) are radially arranged on the outer side wall of the fixing tube (31), and the outer side ends of the connecting arms (32) are arranged on the inner wall of the collector air guide tube (5).

8. The high-efficiency breeze power generation device suitable for railway locomotives according to claim 7, characterized in that: The connecting arm (32) is in the shape of a plate, and its length extension direction is parallel to the axis of the collector air guide tube (5), and is used to rectify the wake of the wind wheel on the windward side.

9. The high-efficiency breeze power generation device suitable for railway locomotives according to any one of claims 1 to 8, characterized in that: The high-efficiency breeze power generation device also includes a braking device, which is electrically connected to a control system. The control system is also used to control the rotation speed of the axial flow power generation fan (4) through the braking device to prevent excessive rotation speed.

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