阅读说明：本技术 发电机的降雨模拟装置及系统 (Rainfall simulation device and system of generator ) 是由 高杨 张志弘 刘朝丰 于 2019-12-31 设计创作，主要内容包括：本发明涉及发电技术领域,具体涉及一种发电机的降雨模拟装置及系统。一种发电机的降雨模拟装置,包括：支架,用于装配在所述发电机的上方；至少一个降雨机构,间隔固定在所述支架上,用于与水源连接,且对所述发电机所处的降雨环境进行模拟。通过在发电机的上方设置支架,并在支架上固定降雨机构,降雨机构与水源连接,能够将水源的水通过降雨机构流至发电机上,为发电机所处的降雨环境进行模拟,从而能够为发电机营造降雨环境,对发电机在降雨环境下的性能进行测试,进而能够保证发电机在实际的降雨环境下的性能。(The invention relates to the technical field of power generation, in particular to a rainfall simulation device and system of a generator. A rainfall simulation device of a generator, comprising: a bracket for fitting over the generator; and the rainfall mechanisms are fixed on the support at intervals and are used for being connected with a water source and simulating the rainfall environment where the generator is located. The support is arranged above the generator, the rainfall mechanism is fixed on the support and connected with the water source, water at the water source can flow to the generator through the rainfall mechanism, the rainfall environment where the generator is located is simulated, the rainfall environment can be built for the generator, the performance of the generator under the rainfall environment is tested, and the performance of the generator under the actual rainfall environment can be guaranteed.)

1. A rainfall simulation device of a generator, comprising:

a support (1) for fitting above the generator (2);

the rainfall mechanism (3) is fixed on the support (1) at intervals and used for being connected with a water source and simulating the rainfall environment where the generator (2) is located.

2. Rainfall simulation device of the generator according to claim 1, wherein said rainfall mechanism (3) comprises:

the rainfall body (4) is used for being connected with the water source;

the rainfall precipitation device comprises at least one cavity, wherein the cavity is arranged on the rainfall body (4), and a plurality of rainfall through holes are formed in the bottom of the cavity and used for enabling water at the water source to fall onto the generator (2) through the rainfall through holes of the cavity.

3. The rainfall simulation device of the generator of claim 2, wherein the at least one cavity comprises:

the device comprises a first cavity (5), wherein a first rainfall through hole (8) is formed in the bottom of the first cavity (5); and/or the presence of a gas in the gas,

the second cavity (6) is not communicated with the first cavity (5), a second rainfall through hole (9) is formed in the bottom of the second cavity (6), and the diameter of the second rainfall through hole (9) is smaller than that of the first rainfall through hole (8); and/or the presence of a gas in the gas,

the third cavity (7), the second cavity (6) and the first cavity (5) do not communicate with each other, the bottom of third cavity (7) is equipped with third rainfall through-hole (10), just the diameter of third rainfall through-hole (10) is less than the diameter of second rainfall through-hole (9).

4. A rainfall simulation device of an electrical generator in accordance with claim 3, wherein a plane perpendicular to the direction of rainfall is selected to cross-section the rainfall body (4), and the third chamber (7), the second chamber (6) and the first chamber (5) are arranged in sequence along the outward direction from the center of the cross-section.

5. Rainfall simulation device of the generator according to claim 2, wherein said rainfall mechanism (3) further comprises:

and the flow adjusting device is arranged on the cavity and used for adjusting the flow of water flowing into the cavity.

6. The rainfall simulation device of the generator of claim 5, wherein the flow regulating device comprises at least two flow regulating structures arranged in a stack, the flow regulating structures comprising:

adjusting the body;

the adjusting through hole (11) on one of the flow adjusting structures at least has a first state opposite to the adjacent adjusting through hole (11) on the flow adjusting structure and a second state opposite to the adjacent adjusting through hole (11) on the flow adjusting structure and the adjusting body on the flow adjusting structure and the adjusting through hole (11) at the same time.

7. The rainfall simulation device of the generator of claim 6, wherein said flow regulating means has at least two, and each of said flow regulating means is arranged in sequence along the direction of rainfall, said flow regulating structure further comprising:

at least one through hole (12) is arranged on the adjusting body and is at least opposite to the adjusting through hole (11) of the adjacent flow adjusting device.

8. Rainfall simulation device of an electric generator according to claim 7, wherein said flow regulation means have at least three, said through flow holes (12) being at least opposite to the regulation through holes (11) and the through flow holes (12) of the adjacent flow regulation means.

9. Rainfall simulation device of the generator according to any one of claims 1 to 8, wherein said rainfall mechanism (3) is plural;

the rainfall simulation device further comprises:

the main pipeline (13) is arranged on the bracket (1) and is used for connecting the water source;

the bypass pipelines (14) are arranged on the support (1) and are respectively connected with the main pipeline (13) and the rainfall mechanisms (3).

10. Rainfall simulation device of an electrical generator according to any of the claims 1 to 8, wherein the support (1) is of a fan ring structure.

11. The rainfall simulation device of the generator of any one of claims 1 to 8, further comprising:

the lifting translation structure is fixedly connected with the support (1) and used for driving the support (1) to do lifting motion or horizontal motion relative to the generator (2).

12. A rainfall simulation system for an electrical generator comprising a source of water and a rainfall simulation device according to any one of claims 1 to 11.

13. The generator rainfall simulation system of claim 12, wherein the water source comprises:

a water storage device (17);

a fluid passage (18), wherein the water inlet of the fluid passage (18) is communicated with the water storage device (17), and the water outlet of the fluid passage (18) is communicated with the rainfall mechanism (3).

14. The rainfall simulation system of the generator of claim 13, wherein the water source further comprises:

and the heat exchanger (19) is arranged on the fluid channel (18), and fluid in the fluid channel (18) exchanges heat with the external atmosphere through the heat exchanger (19).

15. The rainfall simulation system of the generator of claim 14, wherein the water source further comprises:

and the heating device (20) is arranged on the fluid channel (18), is positioned between the heat exchanger (19) and the rainfall mechanism (3), and is used for heating the fluid in the fluid channel (18).

16. The rainfall simulation system of the generator of claim 15, wherein the water source further comprises:

the temperature detection device (21) is arranged on the fluid channel (18) and is positioned between the heat exchanger (19) and the rainfall mechanism (3);

and the controller is connected with the temperature detection device (21) and is used for controlling the opening and closing of the heat exchanger (19) and the heating device (20) according to the difference value between the detection value of the temperature detection device (21) and a preset value.

17. The rainfall simulation system of the generator of claim 16, wherein the water source further comprises:

the three-way valve (22) is arranged on the fluid channel (18) and located between the water storage device (17) and the heat exchanger (19), the three-way valve (22) is connected with the controller, and the controller controls the three-way valve (22) to further control the opening and closing of the heat exchanger (19).

18. The rainfall simulation system of the generator of claim 17, wherein the water source further comprises:

and the flow regulating component is arranged on the fluid channel (18) and is positioned between the heat exchanger (19) and the rainfall mechanism (3).

19. The rainfall simulation system of the generator of claim 18, further comprising: the input module (32) is connected with the temperature detection device and is used for acquiring input information, and the input information comprises time, longitude and latitude and detection values of the temperature detection device;

the controller comprises a calculation module (30) and a control regulation module (31); the calculation module (30) is connected with the input module (32) and is used for calculating the required precipitation water temperature, precipitation water quantity and a raindrop spectrum distribution function according to the time and the longitude and latitude and calculating the proportion of the cavity flow at different raindrop diameters according to the raindrop spectrum distribution function;

the control and regulation module (31) is connected with the calculation module (30) and is used for generating a first temperature regulation signal when the temperature of the precipitation water is greater than the detection value of the temperature detection device and regulating the working state of the heat exchanger (19) and/or the three-way valve (22) and/or the heating device (20) according to the first temperature regulation signal; when the temperature of the precipitation water is less than or equal to the detection value of the temperature detection device, generating a second temperature adjusting signal, and adjusting the working state of the heat exchanger (19) and/or the three-way valve (22) according to the second temperature adjusting signal; and/or the presence of a gas in the gas,

the device is used for generating a first flow regulating signal according to the amount of the precipitation water and regulating the working state of the flow regulating component according to the first flow regulating signal; and/or the presence of a gas in the gas,

and the flow regulating device is used for generating a second flow regulating signal according to the precipitation water amount and the proportion and regulating the working state of the flow regulating device of the rainfall mechanism according to the second flow regulating signal.

Technical Field

The invention relates to the technical field of power generation, in particular to a rainfall simulation device and system of a generator.

Background

With the increasing of the capacity of a single machine of the generator set, the installation environment of the generator set becomes severer, and the thermal problems of the whole machine, subsystems and subcomponents become great challenges for the design and operation of the generator set. The wind generating set is taken as an example for explanation, in terms of the capacity of a single machine of the set, the capacity level of the single machine is developed to be higher than 8MW and 10MW, the heat production of the set per se reaches hundreds KW or MW level, and the huge heat consumption becomes the largest restriction factor for the temperature rise control of the whole machine, a subsystem and subcomponents; as for the operation environment of the machine assembly machine, the temperature environment of a high-temperature area exceeds 40 ℃, the temperature rise indexes of all subsystems and parts become key restriction factors for ensuring the operation of the machine set in the high-temperature environment.

The wind generating set comprises components such as blades, a hub, a generator, a cabin, a tower and the like, wherein rainfall has a great influence on the heat transfer of the generator of the generating set, and the annual rainfall amount is different in different geographic areas; the precipitation amount and the precipitation temperature are different correspondingly in different seasons and different times; for the actual operation of the generator set, the external precipitation reduces the thermal resistance of the surface of the rotor of the generator and the external heat transfer path, and the reduction of the thermal resistance of the link is beneficial to the whole heat transfer path of the generator; the external favourable environment will favour the reduction of winding, core temperature, whereas for a precise thermal design of the generator the influence of this external factor on the overall temperature level needs to be taken into account. Therefore, how to simulate the rainfall environment of the wind driven generator so as to test the performance of the wind driven generator is an urgent problem to be solved in design optimization of the wind driven generator.

Disclosure of Invention

The invention mainly aims to provide a rainfall simulation device and system of a generator, which can simulate the rainfall environment of the generator.

The embodiment of the invention provides a rainfall simulation device of a wind generating set in a first aspect, which comprises:

the bracket is used for being assembled above a generator of the wind generating set;

and the rainfall mechanisms are fixed on the support at intervals and are used for being connected with a water source and simulating the rainfall environment where the generator is located.

The support is arranged above the generator of the wind driven generator set, the rainfall mechanism is fixed on the support and connected with the water source, water at the water source can flow to the generator through the rainfall mechanism, the rainfall environment where the generator is located is simulated, the rainfall environment can be created for the wind driven generator, the performance of the wind driven generator in the rainfall environment is tested, and the performance of the wind driven generator in the actual rainfall environment can be guaranteed.

In some embodiments, the rainfall mechanism may include:

the rainfall body is used for being connected with the water source;

the rainfall precipitation device comprises at least one cavity, a plurality of rainfall through holes are formed in the bottom of the cavity and used for enabling water at the water source to fall onto the generator through the rainfall through holes of the cavity.

Through setting up rainfall mechanism to include the rainfall body of being connected with the water source to set up at least one cavity on the rainfall body, and the bottom of cavity is equipped with a plurality of rainfall through-holes, can fall the similar rain footpath of water simulation and actual rainfall through the diameter of rainfall through-hole with the water of water source.

In some embodiments, the at least one cavity comprises:

the bottom of the first cavity is provided with a first rainfall through hole; and/or the presence of a gas in the gas,

the second cavity is not communicated with the first cavity, a second rainfall through hole is formed in the bottom of the second cavity, and the diameter of the second rainfall through hole is smaller than that of the first rainfall through hole; and/or the presence of a gas in the gas,

the third cavity, the second cavity and the first cavity are not communicated with each other, a third rainfall through hole is formed in the bottom of the third cavity, and the diameter of the third rainfall through hole is smaller than that of the second rainfall through hole.

Through setting up rainfall mechanism to including first cavity, second cavity and the third cavity that each other communicates with each other, and the diameter of the rainfall through-hole of every cavity bottom is all inequality for the rain footpath of rainfall at every turn all includes the raindrop of big rain footpath, well rain footpath and little rain footpath, makes the rain that falls by rainfall mechanism more similar with actual rainfall.

In some embodiments, a plane perpendicular to the rainfall direction is selected to cross the rainfall body, and the third cavity, the second cavity and the first cavity are sequentially arranged along the outward direction of the center of the cross section.

Because during actual rainfall, the raindrop proportion of the large rain path is smaller, the raindrop proportion of the medium rain path is larger, in order to set the proportion of the raindrops of each rain path, a plane perpendicular to the rainfall direction is selected to make a section for the rainfall body, a third cavity, a second cavity and a first cavity are sequentially arranged in the outward direction of the center of the section, the arrangement of the raindrop proportion of each rain path is convenient, and the structure is simpler.

In some embodiments, the rainfall mechanism further comprises:

and the flow adjusting device is arranged on the cavity and used for adjusting the flow of water flowing into the cavity.

The flow regulating device is arranged on the cavity, so that the flow of water entering the cavity can be regulated, and the rainfall of the rainfall mechanism is more in line with the actual demand.

In some embodiments, the flow regulating device comprises at least two flow regulating structures arranged in a stack, the flow regulating structures comprising:

adjusting the body;

the adjusting through hole on one of the flow adjusting structures at least has a first state opposite to the adjacent adjusting through hole on the flow adjusting structure and a second state opposite to the adjacent adjusting body and the adjacent adjusting through hole on the flow adjusting structure at the same time.

Through the flow regulation structure with flow regulation device including range upon range of setting, the flow regulation structure is including adjusting the body and adjusting the through-hole, through with the structural adjusting the through-hole of one of them flow regulation with the structural adjusting the through-hole pair or with the structural adjusting the body and adjusting the through-hole of adjacent flow regulation simultaneously relative, can adjust by the rainfall of another flow regulation structure of a flow regulation structure flow direction, and then adjust the rainfall of every cavity, it is more convenient to adjust, the structure is simpler.

In some embodiments, the flow rate adjusting device has at least two flow rate adjusting devices, and each of the flow rate adjusting devices is sequentially arranged along a rainfall direction, and the flow rate adjusting structure further includes:

and the at least one circulation through hole is arranged on the adjusting body and is at least opposite to the adjusting through hole of the adjacent flow adjusting device.

Through setting up flow control device to at least two, and each flow control device sets gradually along the rainfall direction to set up the circulation through-hole on adjusting the body, make the rainfall to every flow control device more conveniently adjust, and can guarantee that the rainfall can circulate to another flow control device by a flow control device, adjust the rainfall again.

In some embodiments, the flow regulating device has at least three, the flow through holes being at least opposite to the regulating through holes and the flow through holes of adjacent flow regulating devices.

In some embodiments, the rainfall mechanism is a plurality;

the rainfall simulation device further comprises:

the main pipeline is arranged on the bracket and is used for connecting the water source;

and the bypass pipelines are arranged on the bracket and are respectively connected with the main pipeline and the rainfall mechanisms.

Through setting up rainfall mechanism into a plurality ofly, set up main line and bypass line on the support, can conveniently carry the water source to each rainfall mechanism, and every rainfall mechanism's control is more convenient.

In some embodiments, the support is in a fan ring configuration.

Through setting up the support into fan ring structure for rainfall mechanism's range of setting on the support is wider, except carrying out the rainfall directly over the generator, can also carry out the rainfall to the both sides of generator, and is closer with real rainfall environment.

In some embodiments, the rainfall simulation device further comprises:

and the lifting translation structure is fixedly connected with the support and is used for driving the support to do lifting motion or horizontal motion relative to the wind driven generator.

Through setting up the lift translation structure with support fixed connection, can drive the relative generator of support and make elevating movement or horizontal direction motion for the generator of more models of support can the adaptation and size has improved rainfall analogue means's suitability.

A second aspect of embodiments of the present invention provides a rainfall simulation system for a generator, comprising a water source and a rainfall simulation apparatus as described above.

In some embodiments, the water source comprises:

a water storage device;

and the water inlet of the fluid channel is communicated with the water storage device, and the water outlet of the fluid channel is communicated with the rainfall mechanism.

In some embodiments, the water source further comprises:

and the heat exchanger is arranged on the fluid channel, and fluid in the fluid channel exchanges heat with the external atmosphere through the heat exchanger.

Through set up the heat exchanger on fluid passage, supply the rainfall mechanism with fluid again after passing through the heat exchanger and external atmosphere heat transfer, can adjust the temperature of the rainfall of rainfall mechanism to the temperature of demand for the rainfall more matches with actual rainfall.

In some embodiments, the water source further comprises:

and the heating device is arranged on the fluid channel, is positioned between the heat exchanger and the rainfall mechanism and is used for heating the fluid in the fluid channel.

Through set up heating device on fluid passage, when the temperature of fluid is lower, can heat the fluid, then supply rainfall mechanism again, can adjust the temperature of rainfall mechanism to the temperature of demand for the rainfall more matches with actual rainfall.

In some embodiments, the water source further comprises:

the temperature detection device is arranged on the fluid channel and is positioned between the heat exchanger and the rainfall mechanism;

and the controller is connected with the temperature detection device and used for controlling the opening and closing of the heat exchanger and the heating device according to the difference value between the detection value and the preset value of the temperature detection device.

Through setting up temperature-detecting device and controller, according to the difference automatically regulated heat exchanger and the switching of heating device between temperature-detecting device's the detected value and the default for temperature regulation is more automatic, and more timely.

In some embodiments, the water source further comprises:

the three-way valve is arranged on the fluid channel and positioned between the water storage device and the heat exchanger, the three-way valve is connected with the controller, and the controller controls the three-way valve to further control the opening and closing of the heat exchanger.

Through setting up the three-way valve, can open the heat exchanger or close the heat exchanger as required for the regulative mode is simpler.

In some embodiments, the water source further comprises:

and the flow regulating component is arranged on the fluid channel and is positioned between the heat exchanger and the rainfall mechanism.

Through set up flow regulator on fluid passage, can adjust the rainfall volume that gets into rainfall mechanism for rainfall capacity more accords with actual demand, more matches with real rainfall environment.

The rainfall simulation system further includes: the input module is connected with the temperature detection device and used for acquiring input information, wherein the input information comprises time, longitude and latitude and detection values of the temperature detection device;

the controller comprises a calculation module and a control regulation module; the calculation module is connected with the input module and is used for calculating the required rainfall water temperature, the required rainfall water amount and a distribution function of a raindrop spectrum according to the time and the longitude and latitude and calculating the ratio of the cavity flow at different raindrop diameters according to the distribution function of the raindrop spectrum;

the control and regulation module is connected with the calculation module and is used for generating a first temperature regulation signal when the temperature of the precipitation water is greater than the detection value of the temperature detection device and regulating the working state of the heat exchanger and/or the three-way valve and/or the heating device according to the first temperature regulation signal; when the temperature of the precipitation water is less than or equal to the detection value of the temperature detection device, generating a second temperature adjusting signal, and adjusting the working state of the heat exchanger and/or the three-way valve according to the second temperature adjusting signal; and/or the presence of a gas in the gas,

the device is used for generating a first flow regulating signal according to the amount of the precipitation water and regulating the working state of the flow regulating component according to the first flow regulating signal; and/or the presence of a gas in the gas,

and the flow regulating device is used for generating a second flow regulating signal according to the precipitation water amount and the proportion and regulating the working state of the flow regulating device of the rainfall mechanism according to the second flow regulating signal.

A third aspect of embodiments of the present invention provides an apparatus having a rainfall simulation device, comprising a generator, and a rainfall simulation system as described above.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a rainfall simulation device of a generator according to an embodiment of the present invention;

FIG. 2 is a distribution diagram of a rainfall mechanism in an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a rain mechanism in an embodiment of the present invention;

FIG. 4 is a bottom view of a rain mechanism in an embodiment of the present invention;

FIG. 5 is a schematic view of a rainfall simulation system of a generator in an embodiment of the invention;

FIG. 6 is a diagram illustrating a distribution function of a raindrop spectrum according to an embodiment of the present invention;

FIG. 7 is a control schematic of a rainfall simulation system of a generator in an embodiment of the invention;

fig. 8 is a schematic partial structural view of an apparatus having a rainfall simulation device in an embodiment of the present invention.

Description of reference numerals:

1-a scaffold; 2-a generator; 3-a rainfall mechanism; 4-rainfall body; 5-a first cavity; 6-a second cavity; 7-a third cavity; 8-a first rain through hole; 9-a second rain through hole; 10-a third rain through hole; 11-adjusting the through hole; 12-a flow-through hole; 13-main line; 14-a bypass line; 15-a support; 16-adjusting the support; 17-a water storage device; 18-a fluid channel; 19-a heat exchanger; 20-a heating device; 21-temperature detection means; 22-three-way valve; 23-a variable frequency pump; 24-a pressure gauge; 25-degassing and pressure stabilizing device; 26-a filter; 27-a first flow regulating device; 28-a second flow regulating device; 29-third flow regulating means; 30-a calculation module; 31-controlling the regulating module; 32-an input module; 33-centralized water cooling system.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 8, the present embodiment provides a rainfall simulation device for a wind turbine generator system, including: a support 1 and a rainfall mechanism 3.

The bracket 1 is used for being assembled above a generator 2 of the wind generating set; a plurality of rainfall mechanisms 3 are fixed on the support 1 at intervals and are used for being connected with a water source and simulating the rainfall environment where the generator 2 is located. Set up support 1 through the top at wind generating set's generator 2 to fixed rainfall mechanism 3 on support 1, rainfall mechanism 3 is connected with the water source, can flow the water at water source to generator 2 through rainfall mechanism 3 on, simulates for the rainfall environment that generator 2 is located, thereby can build the rainfall environment for generator 2, tests generator 2 performance under the rainfall environment, and then can guarantee generator 2 performance under the rainfall environment of reality. In an alternative embodiment, the rainfall mechanism 3 may be provided in the center of the frame 1, and in this case, the size of the rainfall mechanism 3 may be set to be large and substantially close to the size of the frame 1. As an alternative embodiment, the rainfall simulation device in the present embodiment may be applied to other types of generators.

As shown in fig. 2, in order to facilitate water supply to each rainfall mechanism 3, the rainfall simulation device in this embodiment further includes: the main pipeline 13 is arranged on the bracket 1 and is used for connecting a water source; and the plurality of bypass pipelines 14 are arranged on the bracket 1 and are respectively connected with the main pipeline 13 and the plurality of rainfall mechanisms 3. Specifically, the main pipeline 13 in this embodiment is disposed in the middle of the support 1, the bypass pipelines 14 extend from the middle to both sides, and the bypass pipelines 14 are connected to the two rainfall mechanisms 3 on each side through hoses, and a quick connector is used, so as to improve the operability of the pipelines. As an alternative embodiment, the main line 13 may be provided on one side of the rack 1, and water may be sent to each rainfall mechanism 3 through the bypass line 14.

As shown in fig. 3 and 4, the rainfall mechanism 3 in the present embodiment includes: the rainfall body 4 is used for being connected with a water source; a plurality of cavitys are located on rainfall body 4, and the bottom of cavity is equipped with a plurality of rainfall through-holes for on falling generator 2 through the cavity with the water at water source. Through setting up rainfall mechanism 3 to including the rainfall body 4 of being connected with the water source to set up a plurality of cavitys on rainfall body 4, and the bottom of cavity is equipped with a plurality of rainfall through-holes, can be with the water simulation of water source for falling down with the similar rain footpath of actual rainfall through the diameter of rainfall through-hole. As an alternative embodiment, it is also possible for the rain mechanism 3 to comprise only one chamber.

Depending on the geographical location of the region, a distribution curve of the raindrop spectrum for the region can be obtained, as shown in fig. 6. The raindrop spectrum distribution curves in different areas have differences, but generally all present a normal distribution form, so that the simulation of the raindrop diameter D can be performed in a cavity splitting mode, for example, as shown in a raindrop spectrum distribution function diagram, the normal distribution curve can be subjected to cavity splitting, for example, D is less than 1 mm; d is more than or equal to 1mm and less than or equal to 4 mm; d is more than 4 mm. As shown in fig. 4, the rainfall mechanism 3 in the present embodiment thus includes: the device comprises a first cavity 5, wherein a first rainfall through hole 8 is formed in the bottom of the first cavity 5; the second cavity 6 is not communicated with the first cavity 5, a second rainfall through hole 9 is formed in the bottom of the second cavity 6, and the diameter of the second rainfall through hole 9 is smaller than that of the first rainfall through hole 8; the third cavity 7, the second cavity 6 and the first cavity 5 are not communicated with each other, a third rainfall through hole 10 is arranged at the bottom of the third cavity 7, and the diameter of the third rainfall through hole 10 is smaller than that of the second rainfall through hole 9. Through setting up rainfall mechanism 3 to including first cavity 5, second cavity 6 and the third cavity 7 that each other communicates with each other, and the diameter of the rainfall through-hole of every cavity bottom is all inequality for the rain footpath of rainfall at every turn all includes the raindrop of big rain footpath, well rain footpath and little rain footpath, makes the rain that falls by rainfall mechanism 3 more similar with actual rainfall. As an alternative embodiment, the rainfall mechanism 3 may comprise only one of the first chamber 5, the second chamber 6 and the third chamber 7, or any two of them, or the rainfall mechanism 3 may comprise more chambers.

Because during actual rainfall, can know by the rain drops spectral distribution curve, the rain drops in big rain footpath account for than less, and the rain drops in well rain footpath account for than great, in order to set up the proportion of the rain drops in each rain footpath, choose the plane perpendicular to rainfall direction and make the cross section to rainfall body 4 to set gradually third cavity 7, second cavity 6 and first cavity 5 along the outside direction in center of cross section, the setting that accounts for than is convenient for to the rain drops in each rain footpath more, the structure is simpler. Specifically, the rainfall mechanism 3 in this embodiment is a cylindrical structure, and a third cavity 7, a second cavity 6 and a first cavity 5 are sequentially arranged from a center line of the cylindrical structure to the outside along the radial direction.

The proportion of the corresponding flow of each cavity can be calculated by an integral method according to the distribution function of the raindrop spectrum, and the corresponding flow of each cavity can be calculated by combining the total rainfall, so that in order to control the flow of water entering each cavity and make the rainfall of the rainfall mechanism 3 more meet the actual demand, the rainfall mechanism 3 in this embodiment further comprises three flow regulating devices, which respectively correspond to the first cavity 5, the second cavity 6 and the third cavity 7 and are used for regulating the flow of water flowing into each cavity. As an alternative embodiment, the flow regulating device can also be specifically configured according to the number of chambers.

Specifically, as shown in fig. 3, the flow rate adjusting device in the present embodiment includes two flow rate adjusting structures arranged in a stack, and the flow rate adjusting structure includes: adjusting the body; the adjusting through holes 11 are arranged on the adjusting body, in the adjusting through holes 11, the aperture sizes of at least two adjusting through holes 11 are different, the adjusting through hole 11 on one flow adjusting structure at least has a first state opposite to the adjusting through hole 11 on the adjacent flow adjusting structure, and a second state opposite to the adjusting body and the adjusting through hole 11 on the adjacent flow adjusting structure at the same time, wherein the flow adjusting structures can be completely stacked or partially stacked and connected through the support 1, and the flow adjusting structures can rotate relatively to realize the conversion of the first state or the second state. Through the flow regulation structure with flow regulation device including range upon range of setting, flow regulation structure is including adjusting the body and adjusting through hole 11, through with the structural adjusting through hole 11 of one of them flow regulation and the structural adjusting through hole 11 of adjacent flow regulation to or with the structural adjusting body of adjacent flow regulation and adjusting through hole 11 simultaneously relative, can adjust by the rainfall of another flow regulation structure of a flow regulation structure flow direction, and then adjust the rainfall of every cavity, it is more convenient to adjust, the structure is simpler. As an alternative embodiment, the flow rate control device may include a plurality of flow rate control structures arranged in a stack. As an alternative embodiment, the adjusting passage 11 may be provided in one or more than one. As an alternative embodiment, the first state and the second state may be switched by relative sliding between the flow rate adjustment structures. As an alternative embodiment, the aperture of the adjustment through hole 11 may be the same.

The flow regulation device in this embodiment has threely, and each flow regulation device sets gradually along the rainfall direction, and the flow regulation structure still includes: a flow through hole 12, which is arranged in a ring shape, is arranged at the edge of the adjusting body and is opposite to the adjusting through hole 11 and the flow through hole 12 of the adjacent flow adjusting device. Through setting up flow control device to three, and each flow control device sets gradually along the rainfall direction to set up circulation through-hole 12 on adjusting the body, make to the rainfall ratio of every flow control device conveniently adjust, and can guarantee that the rainfall can circulate to another flow control device by a flow control device, adjust the rainfall again. As an alternative embodiment, a plurality of flow through holes 12 may be provided. As an alternative embodiment, the individual flow-rate control devices may be arranged in parallel in a direction perpendicular to the direction of rainfall. As an alternative embodiment, two flow rate control devices may be provided, and the flow through hole 12 of the upper flow rate control device may be opposed to the control through hole 11 of the lower flow rate control device.

Specifically, the flow rate adjusting device in this embodiment includes a first flow rate adjusting device 27, which is disposed on the first cavity 5; the second flow regulating device 28 is arranged on the second cavity 6; and a third flow rate adjusting device 29 provided in the third chamber 7. Wherein, the third flow regulating device 29 is arranged at the top, and the rainfall flowing into the third cavity 7 is regulated through the porosity between the regulating through holes 11 of the upper and lower flow regulating structures; the second flow regulating device 28 is arranged in the middle, the through hole 12 of the third flow regulating device 29 is arranged opposite to the regulating through hole 11 and the through hole 12 of the second flow regulating device 28, and the rainfall flowing into the second cavity 6 is regulated through the porosity between the regulating through holes 11 of the upper and lower flow regulating structures; the first flow rate adjusting means 27 is provided at the lowermost portion, the flow through hole 12 of the second flow rate adjusting means 28 is disposed opposite to the adjusting through hole 11 and the flow through hole 12 of the first flow rate adjusting means 27, and the amount of rain flowing into the first chamber 5 is adjusted by the porosity between the adjusting through holes 11 of the upper and lower flow rate adjusting structures. The porosity between the regulating through holes 11 of the concrete up-and-down flow regulating structure can be regulated by the following means: as the regulating through hole 11 of the upper flow regulating structure is completely opposite to the regulating through hole 11 of the lower flow regulating structure (i.e. the first state), the flow is maximum at this time; or the adjusting through hole 11 of the upper flow adjusting structure is simultaneously opposite to the adjusting through hole 11 and the adjusting body of the lower flow adjusting structure (i.e. the second state), and at this time, because the adjusting through hole 11 of the upper flow adjusting structure is partially shielded by the adjusting body, the flow at this time is smaller than the flow at the first state; or the adjusting through hole 11 of the upper flow adjusting structure is opposite to the adjusting body of the lower flow adjusting structure, and at this time, no flow exists because the adjusting through hole 11 of the upper flow adjusting structure is completely shielded by the adjusting body.

As shown in fig. 1, the bracket 1 in this embodiment is a fan-ring structure, specifically, an included angle between a first side of the fan-ring structure and a second side of the fan-ring structure is 150 °, and an included angle between the first side of the fan-ring structure and a horizontal plane is 15 °. Through setting up support 1 to the fan ring structure for rainfall mechanism 3 is wider in the scope of setting up on support 1, except carrying out the rainfall directly over generator 2, can also radiate generator 2's both sides, and is closer with real rainfall environment. As an alternative embodiment, the first side and the second side of the fan ring structure may be set at other angles.

As shown in fig. 7, the rainfall simulation device in this embodiment further includes: and the lifting translation structure is fixedly connected with the support 1 and is used for driving the support 1 to do lifting motion or horizontal motion relative to the wind driven generator 2. Through setting up the lift translation structure with 1 fixed connection of support, can drive 1 relative generator 2 of support and make elevating movement or horizontal direction motion for support 1 can the adaptation generator 2 of more models and sizes, has improved rainfall analogue means's suitability.

The specific form of the lifting translation structure is various, and the lifting translation structure in this embodiment includes: the support 15 is provided with a chute; one end of the adjusting bracket 161 is provided with a slide rail which is matched with the slide groove to slide, and the other end is fixedly connected with the first bracket 1; the lifting electric cylinder is connected to the support 15 in a sliding manner and is fixedly connected with the adjusting bracket 161, and the adjusting bracket 161 can be driven to drive the first bracket 1 to do lifting motion; the horizontal movement type electric cylinder is fixedly connected with the adjusting bracket 161, and can drive the adjusting bracket 161 to drive the first bracket 1 to move in the horizontal direction. As an alternative embodiment, any other elevating/translating mechanism may be used as long as it can realize both the elevating movement and the horizontal movement.

The embodiment also provides a rainfall simulation system of the generator, which comprises a water source and the rainfall simulation device.

Specifically, the water source in this embodiment is a centralized water cooling system 33 of the wind turbine generator system, as shown in fig. 5, and includes: a water storage device 17; a fluid passage 18, the water inlet of the fluid passage 18 is communicated with the water storage device 17, and the water outlet of the fluid passage 18 is communicated with the rainfall mechanism 3. By adopting the centralized water cooling system 33 of the wind generating set as the water source, the water source is provided for the rainfall mechanism 3 while providing water sources for other parts, so that the structure of the whole system is compact, the water source special for the rainfall mechanism 3 is not required to be independently arranged, and the cost is reduced. Alternatively, the water source may be configured in other ways or may be a water source provided for the rainfall mechanism 3.

Because there is certain temperature during the actual rainfall, in order to match with the actual rainfall more, the centralized water cooling system 33 in this embodiment further includes: the heat exchanger 19 is arranged on the fluid channel 18, and fluid in the fluid channel 18 exchanges heat with the external atmosphere through the heat exchanger 19; and the heating device 20 is arranged on the fluid channel 18 and positioned between the heat exchanger 19 and the rainfall mechanism 3 and is used for heating the fluid in the fluid channel 18. By arranging the heat exchanger 19 on the fluid channel 18, the fluid is supplied to the rainfall mechanism 3 after being subjected to heat exchange with the outside atmosphere through the heat exchanger 19, and the temperature of rainfall of the rainfall mechanism 3 can be adjusted to the required temperature, so that the rainfall is more matched with the actual rainfall. By arranging the heating device 20 on the fluid channel 18, when the temperature of the fluid is low, the fluid can be heated and then supplied to the rainfall mechanism 3, and the temperature of rainfall of the rainfall mechanism 3 can be adjusted to a required temperature, so that the rainfall is more matched with the actual rainfall. The heat exchanger 19 in this embodiment may be a cooling tower, an air-water plate heat exchanger, etc., which realizes the transfer of heat inside the system to the external environment, and is not limited in particular. As an alternative embodiment, the heat exchanger 19 may not be provided.

In order to make the temperature adjustment more automatic and timely, the centralized water cooling system 33 in this embodiment further includes: the temperature detection device 21 is arranged on the fluid channel 18 and is positioned between the heat exchanger 19 and the rainfall mechanism 3; and the controller is connected with the temperature detection device 21 and is used for controlling the opening and closing of the heat exchanger 19 and the heating device 20 according to the difference value between the detection value of the temperature detection device 21 and a preset value.

For the opening and closing of the controller, the centralized water cooling system 33 in the present embodiment further includes: and the three-way valve 22 is arranged on the fluid channel 18 and is positioned between the water storage device 17 and the heat exchanger 19, the three-way valve 22 is connected with the controller, and the controller controls the opening and closing of the heat exchanger 19 by controlling the three-way valve 22. By arranging the three-way valve 22, the heat exchanger 19 can be opened or closed as required, that is, whether the fluid of the water storage device 17 passes through the heat exchanger 19 for heat exchange or not is controlled by on-off of each path of the three-way valve 22 and then flows to the rainfall mechanism 3, so that the adjusting mode is simpler. The controller may directly control whether or not the heating means of the heating device 20 is energized when the heating device 20 is opened or closed.

In order to adjust the rain flow entering the rainfall mechanism 3, so that the rain flow is more suitable for the actual demand and is more matched with the real rainfall environment, the centralized water cooling system 33 in this embodiment further includes a flow adjusting component, which is disposed on the fluid channel 18 and between the heat exchanger 19 and the rainfall mechanism 3. Specifically, the flow rate adjusting component in this embodiment is the variable frequency pump 23, and can provide power for the centralized water cooling system 33 while adjusting the flow rate. As an alternative embodiment, the flow rate adjustment means may be a flow rate adjustment valve.

According to the precipitation intensity classification standard, the centralized water cooling system 33 in the embodiment can meet the simulation of the environment of light rain, gust rain, medium rain, heavy rain and extra heavy rain, and the total precipitation in 24 hours can meet the requirement of more than 250 mm. In order to make the system operate more smoothly, the centralized water cooling system 33 in the embodiment further includes a pressure measuring instrument 24 and a degassing and pressure stabilizing device 25; in order to ensure the water quality in the system, the centralized water cooling system 33 in the embodiment further comprises a filter 26.

As shown in fig. 7, since the environmental temperatures in different seasons and different times are different, and the actual rainfall temperature is also different, in this embodiment, the system itself controls the system to realize the precise control of the water temperature, and the rainfall simulation system in this embodiment further includes: the input module 32 is connected with the temperature detection device and used for acquiring input information, wherein the input information comprises time, longitude and latitude and detection values of the temperature detection device; the controller comprises a calculation module 30 and a control and regulation module 31; the calculation module 30 is connected with the input module 32 and is used for calculating the required rainfall water temperature, the required rainfall water amount and the distribution function of the raindrop spectrum according to time and longitude and latitude and calculating the ratio of the cavity flow at different raindrop diameters according to the distribution function of the raindrop spectrum; the control adjusting module 31 is connected with the calculating module 30, and is configured to generate a first temperature adjusting signal when the temperature of the precipitation water is greater than the detection value of the temperature detecting device, and adjust the operating state of the heat exchanger 19 and/or the three-way valve 22 and/or the heating device 20 according to the first temperature adjusting signal; when the temperature of the precipitation water is less than or equal to the detection value of the temperature detection device, generating a second temperature adjusting signal, and adjusting the working state of the heat exchanger 19 and/or the three-way valve 22 according to the second temperature adjusting signal; and/or, the first flow regulating component is used for generating a first flow regulating signal according to the amount of the precipitation water and regulating the working state of the flow regulating component according to the first flow regulating signal; and/or the controller is used for generating a second flow regulating signal according to the precipitation water amount and the proportion and regulating the working state of the flow regulating device according to the second flow regulating signal.

The input module 32 may be an upper computer or a human-computer interaction interface, such as a touch screen, and the user inputs time, longitude and latitude through the touch screen, where the time specifically includes season, day, hour, minute, and the like, and the longitude and latitude correspond to different areas, so that the rainfall simulation system can simulate scenes corresponding to factors such as different areas and different times, and send the scenes to the calculation module 30 of the controller, and the calculation module may be a computer program and the like, and obtains the temperature of rainfall, the amount of rainfall, and the distribution function of the rainfall spectrum in different areas and at different times to be simulated through internal calculation, and calculates the proportion of the cavity flow at different raindrop diameters according to the distribution function of the rainfall spectrum.

Specifically, for the control of the temperature of the precipitation water, for example, when the temperature T of the precipitation water is greater than the detection value T of the temperature detection device 21, the control adjustment module 31 generates a first temperature adjustment signal, and at this time, the centralized water cooling system 33 adjusts the operation power of the heat exchanger 19; or the flow path from the three-way valve 22 to the heat exchanger 19 is closed, so that the fluid does not pass through the heat exchanger 19; or the heating device 20 is started to realize the matching of the water supply temperature and the rainfall water temperature; when the rainfall water temperature T is less than or equal to the detection value T of the temperature detection device 21, the control adjustment module 31 generates a second temperature adjustment signal, and at this time, the centralized water cooling system 33 opens the flow path from the three-way valve 22 to the heat exchanger 19, or adjusts the operation power of the heat exchanger 19 to realize the matching of the water supply temperature and the rainfall water temperature. Of course, when the control and adjustment module 31 generates the first temperature adjustment signal, the control and adjustment module 31 may also control any two or three of the heat exchanger 19, the three-way valve 22 and the heating device 20 at the same time; when the control and regulation module 31 generates the second temperature regulation signal, the control and regulation module 31 may also control the heat exchanger 19 and the three-way valve 22 simultaneously.

For controlling the amount of the precipitation water, the control and adjustment module 31 generates a first flow adjustment signal according to the amount of the precipitation water, adjusts the operating frequency of the variable frequency pump 23 according to the first flow adjustment signal, further adjusts the fluid flow in the fluid channel 18 to the required amount of the precipitation water, then generates a second flow adjustment signal according to the amount of the precipitation water and the ratio of the flow of the cavities where different raindrop diameters are located calculated by the raindrop spectrum distribution function in an integral manner, that is, the corresponding flow of each cavity can be calculated by combining the required amount of the precipitation water and the ratio, because each cavity corresponds to one flow adjustment device, the control and adjustment module 31 can adjust the working state of the first flow adjustment device 27 according to the second flow adjustment signal to further adjust the flow entering the first cavity 5, and adjust the working state of the second flow adjustment device 28 to further adjust the flow entering the second cavity 6, the working state of the third flow regulating device 29 is regulated to regulate the flow entering the third cavity 7, that is, the rainfall flowing into each cavity is regulated by regulating the porosity between the regulating through holes 11 of the upper and lower flow regulating structures. Of course, when controlling the amount of the precipitation water, the control and adjustment module 31 may adjust the operating frequency of the variable frequency pump 23 only according to the first flow rate adjustment signal, or adjust the operating state of each flow rate adjustment device only according to the second flow rate adjustment signal.

As shown in fig. 8, the present embodiment also provides an apparatus having a rainfall simulation device, including the wind power generator 2, and the rainfall simulation system as described above.

The rainfall simulation system is arranged on the generator 2, so that the simulation of an actual rainfall scene can be performed on a transmission test bed of the generator 2, the simulation of different rainfall amounts, rainfall temperatures and the like corresponding to the rainfall simulation system in different regions, different seasons and different time periods can be performed, the influence of the external environment in four seasons is avoided, the environmental adaptability of the generator 2 can be more accurately evaluated, the customized heat design of the generator 2 can be further realized, the refined design is realized, and the self heat exchange and the corresponding temperature rise level of the generator 2 can be more accurately predicted and ascertained; because the influence of rainfall on the heat exchange characteristic of the generator 2 can hardly be obtained through an empirical formula or simple theoretical calculation, the rainfall simulation system provided by the embodiment of the invention has valuable practical significance.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.