CN110823741B

CN110823741B - Rainfall simulator

Info

Publication number: CN110823741B
Application number: CN201911079962.XA
Authority: CN
Inventors: 郭旭; 李金焕
Original assignee: Changzhou Hexindasai New Energy Technology Development Co ltd
Current assignee: Changzhou Hexindasai New Energy Technology Development Co ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2022-07-05
Anticipated expiration: 2039-11-07
Also published as: CN110823741A

Abstract

The invention relates to a rainfall simulation device, wherein a rainfall system and a test rotary table are arranged in a closed space, the test rotary table is used for fixing a wind power blade to be tested and driving the wind power blade to rotate, the rainfall system comprises a cavity and a nozzle structure for releasing liquid from the cavity to the test rotary table, the nozzle structure is divided into a plurality of groups according to different liquid flow sections, and spoilers for selectively opening the nozzle structures with different flow sections are arranged in the cavity. According to the invention, liquid for acting on the wind power blade enters the cavity, is sprayed out from the nozzle structure after being transferred through the cavity, so as to reach the surface of the wind power blade, and an action condition similar to rainwater is formed.

Description

Rainfall simulator

Technical Field

The invention relates to the technical field of wind power blade testing, in particular to a rainfall simulation device.

Background

At present, aiming at the situation that the protection life, namely the durability of the front edge protection material of the wind power blade has no standard evaluation method and evaluation standard, the protection life is generally accepted to be evaluated by simulating the scouring damage of high-speed rainwater through experimental equipment in the industry. However, the conventional test equipment cannot realize control including rainfall and raindrop size, so that the diversification of test conditions cannot be realized.

In view of the above problems, the inventor of the present invention has made extensive research and innovation based on practical experience and professional knowledge in engineering application of such products for many years, and together with the application of theory, in order to create a rainfall simulation device, which is more practical.

Disclosure of Invention

The invention provides a rainfall simulation device, thereby solving the problems in the background art.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a rainfall analogue means, includes airtight space, rainfall system and experimental revolving stage, and rainfall system and experimental revolving stage all set up in airtight space, wherein experimental revolving stage is used for fixing and driving its rotation the wind-powered electricity generation blade that awaits measuring, the rainfall system include the cavity and certainly the cavity to experimental revolving stage carries out the nozzle structure of liquid release, wherein nozzle structure divide into a plurality of groups according to the difference of liquid circulation cross-section, be provided with in the cavity and be used for different circulation cross-sections nozzle structure carries out the selectively open spoiler.

Further, the cavity passes through the staving to and enclose jointly to establish and form to the top cap that carries out sealing at its top, the top cap pass through the sleeve pipe with airtight space top fixed connection, the spoiler top is provided with into the water hard tube, just it is provided with spacing boss to go into water hard tube periphery, spacing boss with the top cap for the inner wall of cavity offsets, is used for guaranteeing the spoiler is connected the back laminating that targets in place with the staving with the cavity bottom at the top cap, wherein, it is located to go into the water hard tube be provided with the water inlet that supplies water in the cavity on the part between spacing boss and the spoiler.

Further, the water inlets are provided with at least three water inlets and are evenly distributed around the axis of the water inlet hard pipe.

Furthermore, the upper surface of the limiting boss is provided with a sealing ring around the periphery of the water inlet hard pipe, and the sealing ring realizes sealing under the extrusion of the top cover.

Further, the periphery of spoiler is provided with the sealing washer, the sealing washer passes through the extrusion realization of staving inner wall is sealed.

Furthermore, the circumference periphery of top cap is provided with the external screw thread, be provided with the internal thread that matches with the external screw thread on the staving inner wall, through control the degree of depth of top cap screw in staving ensures the top cap with the laminating nature of spacing boss.

Furthermore, the bottom of the cavity is provided with at least two nozzle structures with equal flow cross sections along a radial direction, and a plurality of nozzle structures are uniformly distributed along the central axis of the cavity in the radial arrangement mode, so that a group of nozzle structures with the same liquid flow cross sections are formed, a plurality of groups are arranged in the group mode according to different flow cross sections, and hole sites corresponding to the group of nozzle structures are arranged on the flow blocking plate.

Furthermore, sealing rings are arranged on the spoiler around the periphery of each nozzle structure or around the periphery of all the nozzle structures arranged along one radial direction, and the sealing rings realize sealing under the extrusion of the bottom of the cavity.

Further, the nozzle structure comprises a main body and a liquid channel positioned on the main body, wherein the liquid channel is provided with at least 1 circle, and each circle of the liquid channel is dispersedly arranged along the liquid circulation direction.

Furthermore, the outer part of the nozzle structure is provided with an external thread, and the nozzle structure is fixed by matching with the threaded hole at the bottom of the cavity.

Through the technical scheme, the invention has the beneficial effects that:

according to the invention, the liquid for acting on the wind power blade enters the cavity and is ejected out of the nozzle structure after being transferred through the cavity, so that the liquid reaches the surface of the wind power blade to form an acting condition similar to rainwater, and the wind power blade can be effectively tested under the condition of analog simulation. Wherein, the liquid circulation cross-section of nozzle structure is provided with the multiple, opens required liquid flow area's nozzle structure through the spoiler, and closes nozzle structure not required to realize the control of raindrop size, rainfall is synthesized the regulation through the pumping pressure that gets into in the cavity and the rainfall time that lasts, thereby effectual more diversified test condition of having realized, improves the precision of test.

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, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a rainfall simulation device (one side of which is open);

FIG. 2 is a front view of FIG. 1 (including the liquid flowing out);

FIG. 3 is a cross-sectional view of a portion of a rainfall system;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is an enlarged view of a portion of FIG. 3 at B;

FIG. 6 is a schematic view of a bottom structure of the chamber (without the nozzle structure installed);

FIG. 7 is a schematic view of the spoiler;

FIG. 8 is a schematic view of the chamber bottom and the spoiler;

FIG. 9 is another schematic view of the bottom of the chamber (with no nozzle structure installed);

FIG. 10 is a schematic view of two types of sealing rings on the spoiler;

FIG. 11 is a schematic structural view of a nozzle structure;

FIG. 12 is a schematic view of the operation of the nozzle arrangement;

reference numerals: the device comprises a closed space 1, a rainfall system 2, a cavity 21, a nozzle structure 22, a main body 22a, a liquid channel 22b, a spoiler 23, a hole site 23a, a barrel body 24, a top cover 25, a sleeve 26, a water inlet hard pipe 27, a limiting boss 27a, a water inlet 27b, a test turntable 3, a wind power blade 4 and a sealing ring 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.

As shown in fig. 1-3, a rainfall simulation device, including confined space 1, rainfall system 2 and experimental revolving stage 3 all set up in confined space 1, wherein experimental revolving stage 3 is used for fixing the wind-powered electricity generation blade 4 that awaits measuring and drives its rotation, rainfall system 2 includes cavity 21, and carry out the nozzle structure 22 of liquid release to experimental revolving stage 3 from cavity 21, wherein nozzle structure 22 divide into a plurality of groups according to the difference of liquid circulation cross-section, be provided with in the cavity 21 and be used for carrying out the selectively open spoiler 23 to the nozzle structure 22 of different circulation cross-sections.

In the above embodiment, the liquid for acting on the wind power blade 4 enters the cavity 21 and is ejected from the nozzle structure 22 after being transferred through the cavity 21, so as to reach the surface of the wind power blade 4, thereby forming an acting condition similar to rainwater, and enabling the wind power blade 4 to obtain an effective test under the condition of simulation. Wherein, the liquid circulation cross-section of nozzle structure 22 is provided with the multiple, opens required liquid flow area's nozzle structure 22 through spoiler 23, and closes nozzle structure 22 that does not need to realize the control of raindrop size, rainfall comes the integrated control through the pumping pressure that gets into in the cavity 21 and the rainfall time that lasts, thereby the effectual more diversified test condition that has realized improves the precision of test.

Preferably, the cavity 21 is formed by enclosing a barrel 24 and a top cover 25 for sealing the top of the barrel, the top cover 25 is fixedly connected with the top of the enclosed space 1 through a sleeve 26, a water inlet hard pipe 27 is arranged on the top of the spoiler 23, a limit boss 27a is arranged on the periphery of the water inlet hard pipe 27, the limit boss 27a abuts against the top cover 25 relative to the inner wall of the cavity 21 and is used for ensuring that the spoiler 23 and the bottom of the cavity 21 are attached after the top cover 25 and the barrel 24 are connected in place, and a water inlet 27b for supplying water into the cavity 21 is arranged on the part of the water inlet hard pipe 27 between the limit boss 27a and the spoiler 23.

Continuing with fig. 3, the above structure, during assembly, is required to proceed according to the following steps:

s1: fixing the top cover 25 and the sleeve 26, which have been fixedly connected, on the enclosed space 1, wherein it is ensured that the sleeve 26 has a top opening;

s2: the fixed water inlet hard pipe 27 and the fixed spoiler 23 are close to the top cover 25 from bottom to top, and at the moment, a limit boss 27a is arranged on the water inlet hard pipe 27, so that the water inlet hard pipe 27 is inserted into the sleeve 26 until the limit boss 27a abuts against the bottom of the top cover 25, wherein the water inlet hard pipe 27 preferably exceeds the top of the sleeve 26, on one hand, the connection of a water pipe is facilitated, and on the other hand, a gear can be mounted so as to rotate under the driving of a power device;

s3: the nozzle structure 22 is arranged at the bottom of the barrel body 24, the barrel body 24 is close to the flow blocking plate 23 from bottom to top, the flow blocking plate 23 is fixedly connected with the top cover 25, and meanwhile the bottom of the cavity 21 is ensured to be attached to the flow blocking plate 23.

After the above structure is installed, in operation, liquid is supplied through the water inlet hard pipe 27, the liquid entering the water inlet hard pipe enters the cavity 21 through the water inlet 27b, and is ejected from the opened nozzle structure 22 after passing through the flow blocking plate 23, so as to act on the wind power blade 4.

Wherein, in order to guarantee better effect, water inlet 27b is provided with at least three, and evenly distributed around the axis of income water hard tube 27 to make can be more even in the liquid filling cavity 21 in-process, thereby guarantee the homogeneity of final rainwater form.

As shown in fig. 4, the upper surface of the limiting boss 27a is provided with a sealing ring 5 around the periphery of the water inlet hard tube 27, and the sealing ring 5 is sealed under the extrusion of the top cover 25, so that the liquid can be effectively prevented from flowing out from the gap between the water inlet hard tube 27 and the sleeve 26.

As shown in fig. 5, the periphery of the spoiler 23 is provided with a sealing ring 5, and the sealing ring 5 is sealed by squeezing the inner wall of the barrel body 24, so that in the preferred scheme, the same technical effects as those described above are achieved, and the accurate control of the liquid pressure in the cavity 21 can be ensured, thereby realizing the accurate control of multiple parameters including raindrop size and rainfall.

With continued reference to fig. 5, the circumferential periphery of the top cover 25 is provided with external threads, the inner wall of the barrel body 24 is provided with internal threads matched with the external threads, and the fitting property of the top cover 25 and the limiting boss 27a is ensured by controlling the depth of screwing the top cover 25 into the barrel body 24. The connection mode is more convenient and faster, can realize installation under the condition of quickly establishing sealing, has reliable effect, and is convenient for maintenance and cleaning of the inside of the cavity 21.

At least two nozzle structures 22 with equal flow cross sections are arranged at the bottom of the cavity 21 along a radial direction, it is emphasized that the equal flow cross sections do not represent the same overall dimension, the overall dimension can be properly adjusted at different radial positions to ensure the installation, and a plurality of nozzle structures 22 with the same liquid flow cross section are uniformly distributed along the central axis of the cavity 21 in the radial arrangement mode, a plurality of groups of nozzle structures 22 with the same liquid flow cross section are formed in the group mode according to different flow cross sections, wherein hole sites 23a corresponding to the nozzle structures 22 in one group are arranged on the flow baffle 23. Fig. 6 shows a nozzle structure 22 with two equal flow cross sections radially arranged, and a group of 15 group forms is arranged along the central axis of the cavity 21, wherein the nozzle structure is divided into three groups of different flow cross sections, fig. 7 shows a form of a spoiler 23 matched with the spoiler, fig. 8 corresponds the nozzle structure 22 with two equal cross sections, wherein the filling part at the bottom in fig. 8 is the nozzle structure 22 with one group of equal cross sections corresponding to the hole position 23a on the spoiler 23 at each time, and along with the rotation of the spoiler 23, the replacement of different groups can be realized. For better illustration of the above groups, a form of arranging two groups in total is shown in fig. 9.

The flow blocking plate 23 is provided with a sealing ring 5 around the periphery of each nozzle structure 22, as shown at C in fig. 10, or around the periphery of all the nozzle structures 22 arranged along a radial direction, and as shown at D in fig. 10, the sealing ring 5 is pressed by the bottom of the cavity 21 to achieve sealing, so that liquid cannot enter the flow blocking plate 22 and the bottom of the cavity 21 to affect the experimental accuracy.

As shown in fig. 11, the nozzle structure 22 comprises a main body 22a and liquid channels 22b on the main body 22a, wherein the liquid channels 22b are provided with at least 1 turn, and each turn of the liquid channel is arranged in a divergent manner along the liquid flowing direction, wherein, preferably, a liquid channel 22b is arranged in the middle part along the longitudinal direction, by the above-mentioned form, referring to fig. 2, the liquid reaching the wind power blade 2 can be more uniform, wherein the divergent angle can be reduced as much as possible, in this way, the liquid can be dispersed more uniformly, and simultaneously, as shown in fig. 12, the liquid flowing out along the divergent direction can reach the surface of the wind power blade 4 as perpendicular as possible under the action of gravity, so that the directions of the water flows can be similar.

For the installation mode of the nozzle structure 22, an external thread may be arranged outside the nozzle structure, see fig. 11, and the nozzle structure is fixed by matching with the threaded hole at the bottom of the cavity 11, so that the nozzle structure 22 is easier to process, install and replace.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A rainfall simulation device is characterized by comprising a closed space, a rainfall system and a test rotary table, wherein the rainfall system and the test rotary table are arranged in the closed space, the test rotary table is used for fixing a wind power blade to be tested and driving the wind power blade to rotate, the rainfall system comprises a cavity and a nozzle structure for releasing liquid from the cavity to the test rotary table, the nozzle structure is divided into a plurality of groups according to different liquid flow sections, and spoilers for selectively opening the nozzle structures with different flow sections are arranged in the cavity;

the cavity is formed by enclosing a barrel body and a top cover for sealing the top of the cavity together, the top cover is fixedly connected with the top of the closed space through a sleeve, a water inlet hard pipe is arranged at the top of the spoiler, a limiting boss is arranged on the periphery of the water inlet hard pipe, the limiting boss abuts against the top cover relative to the inner wall of the cavity and is used for ensuring that the spoiler is attached to the bottom of the cavity after the top cover is connected with the barrel body in place, and a water inlet for supplying water into the cavity is formed in the part, located between the limiting boss and the spoiler, of the water inlet hard pipe;

the periphery of the top cover is provided with external threads, the inner wall of the barrel body is provided with internal threads matched with the external threads, and the fitting property of the top cover and the limiting boss is ensured by controlling the screwing depth of the top cover into the barrel body;

the assembly process of the cavity structure comprises the following steps:

s1: fixing the fixedly connected top cover and sleeve on the closed space;

s2: the fixed water inlet hard pipe and the fixed flow blocking plate approach the top cover from bottom to top until the limiting boss abuts against the bottom of the top cover;

s3: the nozzle structure is arranged at the bottom of the barrel body, the barrel body is close to the spoiler from bottom to top, the spoiler and the top cover are fixedly connected, and meanwhile, the bottom of the cavity is attached to the spoiler.

2. The rainfall simulator of claim 1, wherein the water inlets are provided in at least three and are evenly distributed about the axis of the water inlet wand.

3. The rainfall simulator of claim 1, wherein the upper surface of the limiting boss is provided with a sealing ring around the periphery of the water inlet hard pipe, and the sealing ring is sealed under the extrusion of the top cover.

4. The rainfall simulation device of claim 1 wherein the spoiler is peripherally provided with a sealing ring that seals by squeezing the inner wall of the barrel.

5. The rainfall simulator of claim 1, wherein said bottom of said chamber is provided with at least two nozzle structures having equal flow cross-sections along a radial direction, and a plurality of said nozzle structures are uniformly distributed along a central axis of said chamber in such a radial arrangement so as to form a group of said nozzle structures having the same flow cross-sections, wherein said group of nozzle structures has a plurality of groups according to different flow cross-sections, and wherein said spoiler is provided with holes corresponding to said group of nozzle structures.

6. A rainfall simulation device according to claim 5 wherein a sealing ring is provided on the spoiler around the periphery of each of the nozzle arrangements or all of the nozzle arrangements arranged in a radial direction, the sealing ring sealing under compression of the chamber floor.

7. A rainfall simulator according to claim 5, wherein the nozzle structure comprises a body and liquid passages in the body, wherein the liquid passages are provided in at least 1 turn and wherein the liquid passages are provided in a divergent arrangement in the direction of liquid flow.

8. A rainfall simulation device according to claim 5 wherein the exterior of the nozzle arrangement is externally threaded and secured by engagement with a threaded hole in the base of the chamber.