CN218882683U - Water-cooling spray pipe structure with replaceable throat - Google Patents

Abstract

The utility model relates to the technical field of aerodynamic models, and provides a throat-replaceable water-cooling spray pipe structure, which comprises a shell, wherein a front contraction section, a throat and a rear contraction section are sequentially arranged in the shell along the airflow direction; the outer side of the throat is provided with a water clamping sleeve, the front end of the throat and the rear end of the front contraction section are connected through a plurality of first fasteners, a first water channel is formed between the inner wall of the water clamping sleeve and the outer wall of the throat, and a first water inlet and a first water outlet which are communicated with the first water channel are formed in the shell; the rear end of the rear contraction section is connected with the rear end of the shell, the rear end of the throat is matched and positioned with the front end of the rear contraction section through a hole shaft, and the front end of the front contraction section is connected with the front end of the shell through a plurality of second fasteners. The utility model discloses need not the change that the throat can be accomplished to the dismouting shell, also guaranteed the uniformity of assembly at every turn, need not moreover at throat outer wall processing basin structure, avoided increasing the processing degree of difficulty and probably lead to the condemned risk of throat because of processing the basin.

Description

Water-cooling spray pipe structure with replaceable throat

Technical Field

The utility model relates to an aerodynamic model technical field particularly, relates to a water-cooling spray tube structure of removable throat.

Background

The jet pipe is a core component of a hypersonic wind tunnel test, in the test process, subsonic gas enters a contraction section after being rectified in a stabilization section, then is accelerated to the sonic speed, then enters a throat of the jet pipe, and is expanded and accelerated again, and finally, uniform airflow with constant Mach number is obtained at the outlet position of the jet pipe, so that the requirement of the hypersonic test of the aircraft is met.

The throat is the most important component of the nozzle, and the quality of the throat is directly related to the quality of the whole nozzle. The shape of the throat is that two ends are large, the middle is small, and the ratio of the cross-sectional area of the throat to the cross-sectional area of the outlet of the nozzle is a key factor for ensuring the high Mach number nozzle. Generally, in the same wind tunnel test section, the size of the nozzle outlet is fixed, and the area of the throat needs to be reduced to obtain high Mach number, which brings great difficulty to processing. Meanwhile, the temperature of the throat of the high-Mach-number spray pipe can reach 800 ℃ in the test process, and the borne pressure can reach 12Mpa, so that the cooling problem of the throat part is also considered under the condition that the strength and the rigidity of the design and the processing of the spray pipe are considered.

The traditional spray pipe cooling method mainly comprises two methods, one is to cool the outside of the spray pipe, which brings great trouble to the test environment, the other is to weld a layer of shell outside the spray pipe and then feed high-pressure cooling water into a cavity formed between the outer wall surface of the spray pipe and the shell so as to achieve the purpose of cooling the spray pipe, but the cooling method needs welding, which not only damages the spray pipe body, but also can cause safety and water leakage accidents due to the infirm welding.

In order to solve the above problems, in the prior art (for example, patent documents with publication numbers "CN112727860B" and "CN104406763B" and the like), a throat is assembled inside a housing, a cooling water tank is processed on the throat, and a filler block is assembled between the throat and the housing to form a non-welded assembly type water-cooling nozzle structure, however, the prior art still needs to process the throat to form the cooling water tank, the throat is difficult to process due to the structural characteristics of the throat, the throat is difficult to process, the throat is easy to scrap due to carelessness in the processing process, in addition, the housing needs to be disassembled when the throat is replaced in the prior art, the problem of throat positioning is involved in each time of disassembling and assembling consistency is difficult to maintain in each time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a water-cooling spray tube structure of removable throat to it is big to solve the prior art processing degree of difficulty, changes the throat moreover and need dismantle the shell and lead to being difficult to keep assembling the technical problem of uniformity at every turn.

The embodiment of the utility model discloses a realize through following technical scheme:

a water-cooling spray pipe structure with a replaceable throat comprises a shell, wherein a front contraction section, the throat and a rear contraction section are sequentially arranged in the shell along the airflow direction;

the outer side of the throat is provided with a water clamping sleeve, the front end of the throat and the rear end of the front contraction section are connected through a plurality of first fasteners, a first water channel is formed between the inner wall of the water clamping sleeve and the outer wall of the throat, and a first water inlet and a first water outlet which are communicated with the first water channel are formed in the shell;

the rear end of the rear contraction section is connected with the rear end of the shell, the rear end of the throat is matched and positioned with the front end of the rear contraction section through a hole shaft, the front end of the front contraction section is connected with the front end of the shell through a plurality of second fasteners, and after the second fasteners are disassembled, the front contraction section, the throat and the water clamping sleeve can be taken out from the front end of the shell.

Optionally, the rear end of the throat is provided with a conical surface, and the front end of the rear contraction section is provided with a taper hole matched with the conical surface.

Optionally, a plurality of support rings matched with the inner wall of the shell are arranged at intervals along the axial direction on the outer side of the water clamping sleeve.

Optionally, the cross section of the first water channel changes along with the cross section of the outer wall of the throat, the water jacket comprises a first half sleeve and a second half sleeve, and two sides of the first half sleeve and two sides of the second half sleeve are connected through a plurality of third fasteners.

Optionally, a second water channel is formed between the inner wall of the outer shell and the outer wall of the rear contraction section, the second water channel is separated from the first water channel, and a second water inlet and a second water outlet which are communicated with the second water channel are formed in the outer shell.

Optionally, the first water inlet, the first water outlet, the second water inlet and the second water outlet are all provided with a plurality of water inlets at intervals along the circumferential direction of the shell.

Optionally, a third waterway is formed between the inner wall of the housing and the outer wall of the front convergent section.

Optionally, the third flume is in communication with the first flume.

Optionally, the rear end of the rear contraction section is provided with a positioning disc, the rear end of the housing is provided with a positioning hole matched with the positioning disc, and the rear end of the housing is connected with an expansion section for compressing the positioning disc through a plurality of fourth fasteners.

Optionally, the housing comprises a front housing and a rear housing, and the rear end of the front housing and the front end of the rear housing are positioned by matching shaft holes and connected by a plurality of fifth fasteners.

The utility model discloses at least, following advantage and beneficial effect have:

1. the utility model discloses in, will press from both sides the water jacket through a plurality of first fasteners, throat and preceding shrink section are connected and are formed a whole, be connected this holistic front end (the front end of shrink section before promptly) and shell through a plurality of second fasteners, after dismantling the second fastener, can take out this whole from the shell front end, make and need not the change that the throat can be accomplished to the dismouting shell, and pass through hole axle cooperation location with this holistic rear end (the rear end of throat promptly) and the front end of back shrink section, the uniformity of assembling at every turn has been guaranteed.

2. The utility model discloses need not to process the basin structure at the outer wall of throat, avoided increasing the processing degree of difficulty and probably lead to the condemned risk of throat because of processing the basin.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a sectional view of a water-cooling nozzle structure with a replaceable throat according to the present invention;

FIG. 2 is a schematic view of a half-section structure of a water-cooling nozzle structure with a replaceable throat according to the present invention;

FIG. 3 is a schematic structural view of a water-cooling nozzle structure with a replaceable throat according to the present invention;

FIG. 4 is a schematic illustration of a first flume;

FIG. 5 is a schematic illustration of a second flume;

FIG. 6 is an enlarged view taken at A in FIG. 1;

FIG. 7 is an enlarged view of FIG. 1 at B;

FIG. 8 is an enlarged view at C of FIG. 1;

icon: 101-front housing, 102-rear housing, 103-flared section, 104-fourth fastener, 105-fifth fastener, 106-water-cooled quick-change coupling, 107-first sealing ring, 108-second sealing ring, 109-third sealing ring, 201-front constricted section, 202-second fastener, 203-fourth sealing ring, 204-throat, 205-first fastener, 206-water jacket, 207-fifth sealing ring, 208-sixth sealing ring, 209-rear constricted section, 210-seventh sealing ring, 211-third fastener, T1-first gap, T2-second gap, T3-first tensioning gap, T4-second tensioning gap.

Detailed Description

Referring to fig. 1-3, a water-cooling nozzle structure with a replaceable throat 204 includes a housing, the housing includes a front housing 101 and a rear housing 102, a rear end of the front housing 101 is located in a shaft hole in a matching manner with a front end of the rear housing 102 and is connected to the front end of the rear housing 102 by a plurality of fifth fastening members 105, specifically, in this embodiment, a shaft is provided at a rear end of the front housing 101, a hole is provided at a rear end of the rear housing 102 in a shaft hole matching manner, so as to ensure concentricity of the front housing 101 and the rear housing 102, further, a connecting flange is provided at a rear end of the front housing 101 and a front end of the rear housing 102, and the front housing 101 and the rear housing 102 are tightened by the fifth fastening members 105 (bolts are selected herein, it should be known to those skilled in the art that in the practical application, bolts are used in cooperation with nuts, and are usually provided with elastic washers and flat washers to improve connection tightness).

Referring to fig. 7, in the present embodiment, a sealing structure, preferably a conventional labyrinth seal, is disposed on the connecting end surface of the front casing 101 and the rear casing 102 to improve the sealing effect, and a first sealing ring 107 is disposed on the connecting end surface as a sealing element, and a first tightening gap T3 is disposed on the connecting end surface of the front casing 101 and the rear casing 102, where T3 is generally 2-3mm, so as to ensure that the first sealing ring 107 is reliably compressed.

Referring to fig. 1, a front contraction section 201, a throat 204 and a rear contraction section 209 are sequentially arranged in the housing along the airflow direction (arrow direction in fig. 1), the rear contraction section 209 is connected with the rear end of the housing, specifically, the rear end of the rear contraction section 209 is provided with a positioning disc, the rear end of the housing is provided with a positioning hole matched with the positioning disc, the rear contraction section 209 is convenient to install and position, the rear end of the housing is connected with an expansion section 103 for compressing the positioning disc through a plurality of fourth fasteners 104, namely, the rear end and the expansion end of the housing are connected and tensioned through the fourth fasteners 104, and meanwhile, the rear contraction section 209 is also compressed and fixed. The fourth fastener 104 of the present embodiment is also selected to be a bolt (again, those skilled in the art will appreciate that in practice, a bolt is used in combination with a nut, and usually a spring washer and a flat washer are also used to improve the fastening of the connection).

Referring to fig. 8, in this embodiment, a sealing structure, preferably a commonly used labyrinth seal, is disposed on a contact surface between the positioning plate on the rear contraction section 209 and the expansion section 103 to improve the sealing effect, and then the second sealing ring 108 and the third sealing ring 109 are used in cooperation to finally achieve the purpose of isolating the gas inside and outside the nozzle. Furthermore, a second tensioning gap T4 is arranged between the adjacent end faces of the positioning disc and the expansion section 103, wherein T4 is generally 2-3mm, so that the second sealing ring 108 and the third sealing ring 109 are reliably pressed.

Referring to fig. 1-2, the throat 204 is provided with a water jacket 206 on the outer side, the front end of the water jacket 206, the front end of the throat 204 and the rear end of the front contracting section 201 are connected by a plurality of first fasteners 205, that is, the first fasteners 205 connect the water jacket 206, the throat 204 and the front contracting section 201 to form an integral body, and the first fasteners 205 of this embodiment are selected from screws (again, those skilled in the art should know that, in practical application, the screws are usually provided with elastic washers and flat washers to improve the connection tightness).

The rear end of the throat 204 and the front end of the rear contraction section 209 are positioned in a matched mode through a hole shaft, specifically, the rear end of the throat 204 is provided with a conical surface, the front end of the rear contraction section 209 is provided with a conical hole matched with the conical surface, and it is worth explaining that the concentricity between the throat 204 and the rear contraction section 209 is conveniently guaranteed and the assembling precision is improved through the matched positioning of the conical surface and the conical hole.

The front end of the front shrink section 201 is connected with the front end of the housing by a plurality of second fasteners 202, and the second fasteners 202 of this embodiment are selected from screws (likewise, those skilled in the art should know that, in practical applications, the screws are usually provided with elastic washers and flat washers to improve the connection tightness). In this embodiment, a connecting flange is provided at the front end of the front contracting section 201, a connecting step corresponding to the connecting flange is provided on the inner wall of the front end of the housing, the water jacket 206, the throat 204 and the front contracting section 201 are connected into a whole by a first fastening member 205 during installation, the whole is inserted from the front end of the housing so that the rear end of the whole (i.e., the rear end of the throat 204) and the front end of the rear contracting section 209 are positioned by hole-shaft fit, and the connecting flange at the front end of the front contracting section 201 is tightened on the connecting step on the inner wall of the front end of the housing by a second fastening member 202.

From the top to the bottom, this embodiment connects water jacket 206, throat 204 and preceding shrink section 201 through a plurality of first fasteners 205 and forms a whole to be connected this holistic front end (being the front end of preceding shrink section 201) and shell through a plurality of second fasteners 202, after dismantling second fastener 202, can take out this whole from the shell front end, make need not dismouting shell can accomplish the change of throat 204, pass through the hole axle cooperation location with this holistic rear end (being the rear end of throat 204) and the front end of back shrink section 209, guaranteed the uniformity of assembling at every turn.

In addition, the whole cavity channel formed by connecting the water clamping sleeve 206, the throat 204 and the front contraction section 201 is a hole section from large to small along the airflow direction, and the sizes of corresponding parts are kept to be matched, so that the whole part is convenient to mount and take out; referring to fig. 6, a first gap T1 is provided between the outer periphery of the connecting flange of the front shrinking section 201 and the inner wall of the housing, a second gap T2 is provided between the connecting flange of the front shrinking section 201 and the adjacent end face of the connecting step of the inner wall of the housing, T1 and T2 are generally 1-2mm, the first gap T1 is used for reducing the matching surface and achieving the purpose of facilitating disassembly and assembly, the second gap T2 is used for ensuring that the whole of the water clamping sleeve 206, the throat 204 and the front shrinking section 201 has a certain pressing amount during assembly, so that the purpose of smooth and flush of the inner profile of the nozzle is achieved while the sealing rings between the end faces are pressed.

Referring to fig. 1 and 4, a first water channel is formed between an inner wall of the water jacket 206 and an outer wall of the throat 204, a first water inlet and a first water outlet which are communicated with the first water channel are formed on the outer shell, and a third water channel is formed between the inner wall of the outer shell and the outer wall of the front contraction section 201 in order to facilitate cooling of the front contraction section 201.

Referring to fig. 6, on the basis, a sealing step is provided between the connecting flange of the front contracting section 201 and the connecting step of the inner wall of the housing, the sealing step is provided with a fourth sealing ring 203 to prevent the cooling water in the third water channel from leaking therefrom, and further, referring to fig. 7, a fifth sealing ring 207 is provided between the rear end of the throat 204 and the front end of the rear contracting section 209 to prevent the cooling water in the first water channel from leaking therefrom.

In other embodiments of the present invention, the first water channel and the third water channel can be separated into two independent water channels, and on the basis, the first water channel and the third water channel are respectively provided with independent water inlet and water outlet, i.e. the throat 204 and the front contraction section 201 can be independently cooled.

Referring to fig. 1 and 4, the cross section of the first water channel changes along with the cross section of the outer wall of the throat 204, and since the smaller the cross section is, the faster the flow rate of the cooling water is, that is, the fastest the flow rate of the cooling water is at the minimum cross section of the throat 204, a good cooling effect is ensured, on this basis, the water jacket 206 includes a first half jacket and a second half jacket, both sides of the first half jacket and the second half jacket are connected through a plurality of third fasteners 211, that is, the water jacket 206 is made into a split type, which is convenient for disassembly and assembly. The third fastener 211 of this embodiment is a bolt (as will be appreciated by those skilled in the art, in practice, a bolt is used in combination with a nut, and usually a spring washer and a flat washer are also provided to improve the fastening of the connection).

The whole water clamping sleeve 206 is of a cylindrical structure, a plurality of support rings matched with the inner wall of the outer shell are axially arranged on the outer side of the water clamping sleeve 206 in the embodiment at intervals, and the support rings are arranged, so that the water clamping sleeve 206 is supported by the outer shell, the strength of the water clamping sleeve 206 is improved, and the water clamping sleeve 206 is prevented from being damaged when high-pressure cooling water flows in the first water channel.

It is from top to bottom visible, the utility model discloses on guaranteeing sufficient rigidity of spray tube and intensity basis, structural as far as possible alleviateed, make things convenient for the transport and the dismantlement of spray tube.

Referring to fig. 1 and 5, a second water channel is formed between the inner wall of the outer shell and the outer wall of the rear contraction section 209, and a second water inlet and a second water outlet which are communicated with the second water channel are formed in the outer shell, which is worth explaining that because the temperature at the throat 204 is higher, and the temperature of the rear contraction section 209 is lower than that of the throat 204, the second water channel is separated from the first water channel, so that the throat 204 and the rear contraction section 209 can be separately and independently cooled.

Referring to fig. 7, in the present embodiment, the outer wall of the front end of the rear shrinking section 209 is provided with a baffle ring, the baffle ring abuts against the inner wall of the outer shell, the baffle ring serves to separate the first water channel from the second water channel, and a sixth sealing ring 208 is provided between the baffle ring and the inner wall of the outer shell to prevent the cooling water in the first water channel and the cooling water in the second water channel from channeling with each other. Referring to fig. 8, a seventh sealing ring 210 is further disposed between the contact surface of the positioning plate at the front end of the rear shrinking section 209 and the positioning hole at the rear end of the housing, so as to prevent the cooling water in the second water channel from leaking therefrom.

Referring to fig. 3, in the present embodiment, the first water inlet, the first water outlet, the second water inlet, and the second water outlet are all provided at intervals along the circumferential direction of the housing, so that rapid water inlet and rapid water outlet are facilitated, and the cooling effect is improved; and the first water inlet, the first water outlet, the second water inlet and the second water outlet can be connected with the water-cooling quick-change connector 106, and the shell of the water-cooling quick-change connector 106 is in a connection form of threads and a sealing ring, so that welding is avoided.

In addition, the roar of the embodiment can be machined by a material (such as beryllium bronze) which is high in temperature resistance and good in heat conductivity, and in the test process, heat in the spray pipe can be quickly conducted to high-pressure cooling water in the first water channel, so that the roar is prevented from being damaged by high temperature, and the service life is prolonged.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a water-cooling spray tube structure of removable throat (204), includes the shell, is equipped with preceding shrink section (201), throat (204) and back shrink section (209) along the air current direction in proper order in the shell, its characterized in that:

a water clamping sleeve (206) is arranged on the outer side of the throat (204), the front end of the water clamping sleeve (206), the front end of the throat (204) and the rear end of the front contraction section (201) are connected through a plurality of first fasteners (205), a first water channel is formed between the inner wall of the water clamping sleeve (206) and the outer wall of the throat (204), and a first water inlet and a first water outlet which are communicated with the first water channel are formed in the shell;

the rear end of the rear contraction section (209) is connected with the rear end of the shell, the rear end of the throat (204) is matched and positioned with the front end of the rear contraction section (209) through a hole shaft, the front end of the front contraction section (201) is connected with the front end of the shell through a plurality of second fasteners (202), and after the second fasteners (202) are disassembled, the front contraction section (201), the throat (204) and the water clamping sleeve (206) can be taken out from the front end of the shell.

2. The water-cooled nozzle structure of a replaceable throat (204) as claimed in claim 1 wherein: the rear end of the throat (204) is provided with a conical surface, and the front end of the rear contraction section (209) is provided with a conical hole matched with the conical surface.

3. The water-cooled nozzle structure of a replaceable throat (204) as claimed in claim 1 wherein: and a plurality of support rings matched with the inner wall of the shell are arranged at intervals along the axial direction on the outer side of the water clamping sleeve (206).

4. The water-cooled nozzle structure with a replaceable throat (204) as claimed in claim 1, wherein: the section of the first water channel is changed along with the section of the outer wall of the throat (204), the water clamping sleeve (206) comprises a first half sleeve and a second half sleeve, and the two sides of the first half sleeve and the second half sleeve are connected through a plurality of third fasteners (211).

5. The replaceable throat (204) water-cooled lance structure in accordance with any one of claims 1 to 4 wherein: a second water channel is formed between the inner wall of the shell and the outer wall of the rear contraction section (209), the second water channel is separated from the first water channel, and a second water inlet and a second water outlet which are communicated with the second water channel are formed in the shell.

6. The water-cooled nozzle structure with a replaceable throat (204) as claimed in claim 5, wherein: the first water inlet, the first water outlet, the second water inlet and the second water outlet are all arranged in a plurality at intervals along the circumferential direction of the shell.

7. The water-cooled nozzle structure with replaceable throat (204) as claimed in any one of claims 1 to 4 wherein: a third water channel is formed between the inner wall of the shell and the outer wall of the front contraction section (201).

8. The water-cooled nozzle structure of a replaceable throat (204) as claimed in claim 7 wherein: the third waterway is in communication with the first waterway.

9. The water-cooled nozzle structure with replaceable throat (204) as claimed in any one of claims 1 to 4 wherein: the rear end of the rear contraction section (209) is provided with a positioning disc, the rear end of the shell is provided with positioning holes matched with the positioning disc, and the rear end of the shell is connected with an expansion section (103) used for pressing the positioning disc through a plurality of fourth fasteners (104).

10. The water-cooled nozzle structure with replaceable throat (204) as claimed in any one of claims 1 to 4 wherein: the shell comprises a front shell (101) and a rear shell (102), wherein the rear end of the front shell (101) is matched and positioned with the front end of the rear shell (102) through a shaft hole and connected through a plurality of fifth fasteners (105).

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