High temperature exhaust central water injection cooling device

Abstract

The application belongs to the technical field of aero-engines, and particularly relates to a high-temperature exhaust center water jet cooling device, which comprises a cylinder body and multi-stage water jet devices installed at different axial positions of the cylinder body; wherein the multi-stage water jet devices comprise flow path water jet and multi-stage water jet ring water jet; the multi-stage water jet ring water jet is provided with a split structure, the water jet ring structure is designed in a split mode, the water jet ring structure is detachable, and maintenance is more convenient. The installation structure of the unit body water jet fan allows the tail end to freely expand, which can effectively solve the thermal expansion cracking problem of the water jet ring, the device has strong reliability, and has great practical value.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aero-engines, and particularly relates to a high-temperature exhaust center water-jet cooling device. BACKGROUND

[0002] A large amount of high-temperature gas (up to 1900 DEG C.) is generated in a combustion chamber test of an aero-engine component, in order to reduce the damage of the high-temperature gas to an exhaust pipe, the exhaust temperature needs to be reduced, and the common method is to directly spray water to reduce the temperature. For a large-diameter (φ1200mm-φ1600mm) exhaust pipe, the temperature range of the high-temperature gas is wide (200 DEG C.-1900 DEG C.), and the flow range is large (10kg / s-150kg / s), and the existing technologies are as follows:

[0003] 1) Single-stage water-jet mode, this technology has simple structure and small flow resistance loss, but the adjustable range is relatively narrow, when the exhaust temperature is low and the flow is small, the water consumption is too much, which is not conducive to energy saving and emission reduction;

[0004] 2) Multi-stage wall centrifugal water-jet mode, this technology has relatively complex structure and small flow resistance loss, but is not conducive to cooling and reducing the temperature of the core area of the high-temperature gas;

[0005] 3) Multi-stage water-jet ring water-jet mode, this technology can solve the cooling problem of the core area of the high-temperature gas, but the existing water-jet ring structure is fixed in the exhaust section and cannot be disassembled, due to long-term work in the environment of large temperature gradient, thermal expansion is out of sync, which causes the water-jet ring to crack, and maintenance is difficult. SUMMARY

[0006] In order to solve the above problems, the application provides a high-temperature exhaust center water-jet cooling device, which comprises:

[0007] A cylinder body and a plurality of multi-stage water-jet devices installed at different axial positions of the cylinder body;

[0008] Among them, the multi-stage water-jet device comprises flow path water-jet and multi-stage water-jet ring water-jet;

[0009] The flow path water-jet comprises a first water jacket arranged on the outer surface of the cylinder body and a plurality of water-jet rods distributed in the circumferential direction on the inner surface of the cylinder body; the first water jacket forms a first water-jet flow path in the form of a ring on the surface of the cylinder body, and has a first water inlet for water injection; one end of the water-jet rod communicates with the first water-jet flow path of the first water jacket by penetrating through the cylinder body, and the other end sprays water into the cylinder body;

[0010] The multi-stage water spraying device comprises water spraying rings installed at different axial positions of a cylinder, the water spraying ring comprises a plurality of water spraying fan units, each water spraying fan unit is provided with a plurality of nozzle assemblies, each water spraying fan unit comprises a radially arranged water inlet rod, an outer water spraying rod, a middle water spraying rod and an inner water spraying rod are respectively arranged at different axial positions of the water inlet rod, and the two ends of the outer water spraying rod, the middle water spraying rod and the inner water spraying rod are respectively provided with a plug cap and a lap joint seat for mutual connection; the plurality of water spraying fan units are connected into a water spraying ring through the lap joint seat; one end of the water inlet rod radially inward is blocked by the plug cap, and the other end is communicated with a ring-shaped water spraying flow path formed by a water jacket outside the cylinder, and the water spraying flow path is provided with a water inlet hole.

[0011] Preferably, the cylinder comprises an inner sleeve and an outer sleeve; the outer sleeve is gap-sleeved outside the inner sleeve, and an annular cavity is formed between the outer sleeve and the inner sleeve, and the cylinder is provided with a water jacket water inlet at one end for injecting water into the annular cavity and a water jacket water outlet at the other end for discharging water from the annular cavity.

[0012] Preferably, the two ends of the cylinder are provided with front and rear flanges for mounting the cylinder.

[0013] Preferably, the water spraying rod comprises a joint, a nozzle, a nozzle, a gasket, a pressure cap, a bolt and a nut; one end of the joint is communicated with the primary water spraying flow path through the cylinder, the joint has a stop on the cylinder, the other end of the joint is connected to the nozzle, and the nozzle is mounted on the nozzle through the gasket and the pressure cap.

[0014] Preferably, the nozzle is a direct jet nozzle.

[0015] Preferably, the nozzle assembly 511 is a centrifugal nozzle.

[0016] Preferably, the lap joint seat has a plate-shaped connecting section with a through hole, and the through holes of the two connected lap joint seats are coaxial by lapping together, and the bolt is connected and fixed with the nut through the two lap joint seats.

[0017] Preferably, the nozzle assembly is mounted on the water spraying ring through the nozzle mounting seat, and a gasket is arranged between the nozzle assembly and the nozzle mounting seat.

[0018] Preferably, the plug cap is provided with a plurality of small holes.

[0019] 1. The application adopts a multi-stage water spraying mode, and the water spraying amount can be adjusted in a wide range, so as to meet the cooling demand of the exhaust gas temperature range of 200-1900℃ and the flow range of 10-150kg / s;

[0020] 2. The application adopts a water spraying ring water spraying mode, which can effectively solve the cooling problem of the high-temperature gas core area and improve the overall cooling effect;

[0021] 3. The water spray ring is designed to be detachable, and the water spray ring is designed as eight identical unitary water spray fans, each of which can be independently detached, and the eight unitary water spray fans form a complete ring water spray ring structure, and the detachable design is more convenient for maintenance and maintenance.

[0022] 4. The application solves the problem of thermal expansion cracking of the water spray ring through a mounting structure that allows the end to expand freely between the unitary water spray fans.

[0023] The advantages of the application include: by designing the water spray ring structure in a split body, the water spray ring structure can be detached, which is more convenient for maintenance. The mounting structure that allows the end to expand freely between the unitary water spray fans can effectively solve the problem of thermal expansion cracking of the water spray ring. The device has strong reliability and great practical value. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a half-sectional view of a high-temperature exhaust center water spray cooling device;

[0025] Figure 2 is an axial view of a high-temperature exhaust center water spray cooling device;

[0026] Figure 3 is a schematic view of a water spray rod;

[0027] Figure 4 is a schematic view of a connecting seat connection;

[0028] Figure 5 is a connecting seat connection sectional view;

[0029] Figure 6 is a schematic view of a water spray fan unit;

[0030] Figure 7 is Figure 6 a C-C sectional view of a water spray fan unit;

[0031] Figure 8 is Figure 6 an E-E sectional view of a water spray fan unit;

[0032] Figure 9 is Figure 6 a D-D sectional view of a water spray fan unit;

[0033] Figure 10 is Figure 6 a G sectional view of a water spray fan unit;

[0034] Figure 11 is Figure 6 an F sectional view of a water spray fan unit. DETAILED DESCRIPTION

[0035] For the purpose of making the technical solutions, advantages and embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0036] A high-temperature exhaust central water spray cooling device structure is shown in Figure 1 、 Figure 2 、 Figure 3 , which mainly includes a front flange 1, an inner sleeve 2, an outer sleeve 3, a first water jacket 4, a second water spray ring 5, a support plate 6, a second water jacket 7, a reinforcing rod 8, a third water spray ring 9, a third water jacket 10, a water jacket water outlet 11, a rear flange 12, a third water inlet 13, a second water inlet 14, a first water inlet 15, a water jacket water inlet 16, a joint 17, a connector 18, a nozzle 19, a gasket 20, a pressure cap 21, a bolt 22, and a nut 23.

[0037] The second water spray ring 5 is composed of eight identical second water spray fan unit bodies.

[0038] The second water spray fan unit body is composed of the following structures: a water inlet rod 501, an outer water spray rod 502, a water spray rod plug cover 503, an outer lap joint seat 504, a reinforcing seat 505, a middle water spray rod 506, a middle lap joint seat 507, an inner water spray rod 508, an inner lap joint seat 509, a water inlet rod plug cover 510, a nozzle assembly 511, a gasket 512, and a nozzle mounting seat 513.

[0039] The third water spray ring 9 has the same structure as the second water spray ring 5.

[0040] The front flange 1, the rear flange 12, the inner sleeve 2 and the outer sleeve 3 are combined into a water jacket structure, the support plate 6 is arranged between the water jacket structure to form a flow path in the water jacket, the first water jacket 4 is fixed outside the outer sleeve 3 to form a first water spraying flow path, the second water jacket 7 is fixed outside the outer sleeve 3 to form a second water spraying flow path, the third water jacket 10 is fixed outside the outer sleeve 3 to form a third water spraying flow path, the end of the second water spraying ring 5 penetrates through the inner sleeve 2 and the outer sleeve 3 to communicate with the second water spraying flow path, the end of the third water spraying ring 9 penetrates through the inner sleeve 2 and the outer sleeve 3 to communicate with the third water spraying flow path, the reinforcing rod 8 is fixed between the second water spraying ring 5 and the third water spraying ring 9, the water jacket outlet 11 and the water jacket inlet 16 are connected with the outer sleeve, the third water inlet 13 is connected with the third water jacket 10, the second water inlet 14 is connected with the second water jacket 7, the first water inlet 15 is connected with the first water jacket 4, the end of the connector 17 penetrates through the outer sleeve 3 and the inner sleeve 2 to communicate with the first water spraying flow path, the connector nozzle 18 is welded with the other end of the connector 17, the cap 21 is threadedly connected with the connector nozzle to press and fix the gasket 20 and the nozzle 19 on the other end of the connector nozzle.

[0041] The front section of the water inlet rod 501 is connected with the outer water spraying rod 502, the middle section of the water inlet rod 501 is connected with the middle water spraying rod 506, the end section of the water inlet rod 501 is connected with the inner water spraying rod 508, the end of the water inlet rod 501 is welded and sealed with the water inlet rod cover 510, the ends of the outer water spraying rod 502, the middle water spraying rod 506 and the inner water spraying rod 508 are welded and sealed with the water spraying rod cover 503, the outer lap joint seat 504 is connected with the end of the outer water spraying rod 502, the middle lap joint seat 507 is connected with the end of the middle water spraying rod 506, the inner lap joint seat 509 is connected with the end of the inner water spraying rod 508, the lap joint seats are arranged in front and back, the nozzle mounting seat 513 is fixed on the water inlet rod 501, the outer water spraying rod 502, the middle water spraying rod 506 and the inner water spraying rod 508, the nozzle assembly 511 is fixed on the nozzle mounting seat 513 through thread connection, the gasket 512 is arranged between the nozzle assembly 511 and the nozzle mounting seat 513, a plurality of small holes are formed in the water spraying rod cover 503, the nozzle 19 is a straight jet nozzle, and the nozzle assembly 511 is a centrifugal nozzle.

[0042] The water spraying fan units are lap-jointed together through the outer lap joint seat 504, the middle lap joint seat 507 and the inner lap joint seat 509 in front and back, the bolt 22 penetrates through the two lap joint seats and is connected and fixed with the nut 23, and eight water spraying fans are connected to form a water spraying ring.

[0043] The device is installed on a test exhaust pipeline and is connected and fixed with the exhaust pipeline through the front flange 1 and the rear flange 12, the first water spraying is straight jet type, the second and third water sprayings are centrifugal type, the water spraying amount can be controlled by changing the opening and closing of the electromagnetic valves of the water inlet pipes of each water spraying level during the test process, and the three-stage water spraying cooling can be realized.

[0044] The water spraying fan unit body is detachable, the unit bodies are connected through the lap joint structure, the whole water spraying fan unit body is free at the end, and when being heated and expanded, the free expansion at the end does not interfere with each other.

[0045] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high temperature exhaust center water injection cooling device, characterized by, The application relates to a water spraying device for a water conservancy project. The water spraying device comprises a cylinder and a multi-stage water spraying device installed at different axial positions of the cylinder. The multi-stage water spraying device comprises a flow path water spraying mechanism and a multi-stage water spraying ring. The flow path water spraying mechanism comprises a primary water jacket (4) arranged on the outer surface of the cylinder and a plurality of water spraying rods circumferentially arranged on the inner surface of the cylinder. The primary water jacket (4) forms a primary water spraying flow path in the form of a ring on the surface of the cylinder, and the primary water jacket (4) is provided with a primary water inlet (15) for water injection.

2. The high temperature exhaust center water injection cooling apparatus of claim 1, wherein, The water spraying ring comprises a plurality of water spraying fan unit bodies, each of which is provided with a plurality of nozzle assemblies (511).

3. The high temperature exhaust center water injection cooling apparatus of claim 1, wherein, The cylinder comprises an inner sleeve (2) and an outer sleeve (3).

4. The high temperature exhaust center water injection cooling apparatus of claim 1, wherein, The outer sleeve (3) is sleeved on the outer side of the inner sleeve (2) with a gap, and an annular cavity is formed between the outer sleeve (3) and the inner sleeve (2).

5. The high temperature exhaust center water injection cooling apparatus of claim 4, wherein, The cylinder is provided with a water jacket water inlet (16) for injecting water into the annular cavity at one end of the cylinder and a water jacket water outlet (11) for discharging water from the annular cavity at the other end of the cylinder.

6. The high temperature exhaust center water injection cooling apparatus of claim 1, wherein, The cylinder is provided with a front flange (1) and a rear flange (12) for mounting the cylinder at both ends.

7. The high temperature exhaust center water injection cooling apparatus of claim 1, wherein, The water spraying rod comprises a joint (17), a nozzle (18), a nozzle (19), a gasket (20), a pressing cap (21), a bolt (22) and a nut (23).

8. The high temperature exhaust center water injection cooling apparatus of claim 1, wherein, The joint (17) is communicated with the primary water spraying flow path through the cylinder.

9. The high temperature exhaust center water injection cooling apparatus of claim 1, wherein, The nozzle (19) is a direct jet nozzle. The nozzle assembly (511) is a centrifugal nozzle. The jointing seat has a plate-shaped connecting section with a through hole. The bolt (22) is connected and fixed with the nut (23) through the two jointing seats. The nozzle assembly (511) is installed on the water spraying ring through a nozzle mounting seat (513). The gasket (512) is arranged between the nozzle assembly (511) and the nozzle mounting seat (513). The plug cap is provided with a plurality of small holes.

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