CN114029177B

CN114029177B - Rotational flow atomization spray head for washing helicopter engine

Info

Publication number: CN114029177B
Application number: CN202111382288.XA
Authority: CN
Inventors: 李劲松; 杨勇志; 邹高鹏; 王成; 戴礼军; 胡传东
Original assignee: China Helicopter Research and Development Institute
Current assignee: China Helicopter Research and Development Institute
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2023-03-14
Anticipated expiration: 2041-11-19
Also published as: CN114029177A

Abstract

The invention provides a rotational flow atomizing spray head for washing a helicopter engine, which comprises: the outer sleeve is connected with the catheter joint to form a cavity; the spiral spraying core is arranged in the cavity and used for rotating a part of flushing fluid to form an inner side rotational flow; the circulator is arranged between the spiral spray core and the spinning disk and is used for guiding the other part of flushing liquid into the spinning disk; the swirl plate is arranged between the nozzle and the circulator and used for rotating the flushing liquid guided by the circulator to form outer swirl; and the nozzle is arranged between the spinning disk and the outer sleeve and used for mixing and colliding the inner side spinning flow and the outer side spinning flow and generating violent action with surrounding air after being sprayed out from the nozzle to form a good atomization effect.

Description

Rotational flow atomization spray head for washing helicopter engine

Technical Field

The invention belongs to the technical field of helicopter engine washing, and particularly relates to a rotational flow atomizing nozzle for washing a helicopter engine.

Background

The atomizing nozzle is a device capable of atomizing water flow into particles with the particle size smaller than 1mm (generally required to be smaller than 0.4 mm), and is widely applied to the fields of agriculture and dust removal. Generally consists of a spray head shell, a spray nozzle and other auxiliary parts.

Currently, the atomizer used generally adds a special mechanical structure to the housing or nozzle of the atomizer to assist atomization. The nozzle core structure is added in the most important mode, fluid enters the vortex cavity under the action of pressure and generates strong rotation, and rotating water flow is sprayed out from a water outlet hole of the nozzle and has a violent action with surrounding air to form an atomization effect. For agricultural pesticide spraying or some cleaning fields, the smaller the particles formed by atomizing water flow by the atomizing nozzle are, the larger the specific surface area of liquid in unit volume is, and the better the operation effect is.

The washing helicopter engine is used for removing impurities such as salt stagnation, dust scale, carbon deposition, oil stain and the like on the helicopter engine, can reduce the degree of corrosion of engine parts, prevent or eliminate certain faults of the engine, prolong the service life of the engine, recover the performance of the engine and improve the efficiency of the helicopter.

For helicopter engine washing, after the washing liquid/cleaning liquid is atomized, the washing liquid/cleaning liquid is more easily sucked into the air inlet channel when the engine rotates in a cold state, and goes deep into the blades of the air compressor, so that the air inlet channel and the air compressor can be cleaned, and meanwhile, the smaller the particles are, the larger the contact area between the liquid in unit volume and the cleaned part in the engine is, and the better the cleaning effect is. And the flushing area of the flushing liquid is enlarged under the action of the rotational flow centrifugal force.

At present, the mainstream atomizing nozzles are single rotational flow sources, and the atomizing effect is poor.

Disclosure of Invention

The purpose of the invention is as follows: the swirl atomizing nozzle with good atomizing effect and large washing area is provided for washing the helicopter engine.

In view of the above technical problem, the present invention provides a swirl atomizer for helicopter engine washing, the swirl atomizer comprising:

the outer sleeve is in threaded connection with the conduit joint to form a cavity;

the spiral spraying core is arranged in the cavity and used for enabling the flushing liquid at the central part to rotate to form inner side rotational flow;

the circulator is arranged between the spiral spray core and the spinning disk and is used for guiding outside flushing fluid into the spinning disk;

the swirl plate is arranged between the nozzle and the circulator and is used for leading the circulator to guide the flow of the washing liquid to rotate so as to form outer swirl;

preferably, the spiral spray core comprises: and the at least two spiral grooves are arranged on the spiral spray core and are used for enabling the central part of flushing liquid to flow through the spiral grooves and form inner side rotational flow.

Preferably, the at least two spiral grooves penetrate from the top to the tail of the spiral core-spraying conical head.

Preferably, the swirl atomizing nozzle further comprises: and the spring is arranged between the conduit joint and the spiral spraying core and is used for supporting the spiral spraying core.

Preferably, the spring is a variable-diameter tower-shaped spring, and the large flow passage area of the gap greatly reduces the resistance of outside flushing liquid to flow to the circulator.

Preferably, the catheter connector is centered on an outwardly diverging conical surface for supporting the spring.

Preferably, the spinning disk comprises: a plurality of flow guide grooves tangent to the central hole are formed and are uniformly arranged in a ring shape, and outside washing liquid guided by the circulator tangentially enters the central hole through the six flow guide grooves to form outside rotational flow in the central hole; and the central hole is formed in the middle of the spinning disk, and the outer side spinning flows out of the central hole.

Preferably, the flow guide groove comprises at least six.

Preferably, the circulator is provided with a circulation hole for the outside washing liquid to flow from the circulation hole to the swirl plate.

Preferably, the annular flow holes comprise at least eight.

Preferably, the central hole of the circulator is a tapered hole, and the inner rotational flow is sprayed out through the central hole of the circulator.

Preferably, the swirl atomizing nozzle further comprises: and the nozzle is arranged between the spinning disk and the outer sleeve and is used for mixing and colliding the inner side spinning flow and the outer side spinning flow, and the inner side spinning flow and the outer side spinning flow are sprayed out from the nozzle and have violent action with surrounding air to form an atomization effect.

Preferably, the outer sleeve outlet is an outward-expanding conical surface, the rotational flow atomized washing liquid is sprayed from the nozzle and is diffused outwards under the action of centrifugal force, and the downward-expanding conical surface of the outer sleeve guides the downward-flowing washing liquid to form a proper taper angle, so that the cross section of the air inlet channel of the helicopter engine can be covered exactly.

Preferably, the swirl atomizing nozzle further comprises: and the sealing gasket is arranged between the outer sleeve and the conduit joint and used for sealing.

Preferably, the gasket material is 5860 of nitrile rubber and has a thickness of 2mm.

The invention has the beneficial technical effects that:

the invention provides a rotational flow atomization nozzle for washing a helicopter engine, which mainly forms an inner rotational flow by a spiral spray core with a spiral groove, generates an outer rotational flow by a rotational flow sheet with a plurality of diversion grooves tangent to a central hole, and the inner rotational flow and the outer rotational flow are mixed and collided in a nozzle and are sprayed out from the nozzle to generate a violent action with ambient air so as to form a good atomization effect.

Moreover, the flushing area is enlarged under the action of rotational flow centrifugal force, and the foggy water flow is uniformly sprayed into the air inlet channel to flush the air inlet channel and the air compressor completely, so that the flushing effect and the flushing efficiency of the engine are obviously improved.

Drawings

FIG. 1 is a schematic structural diagram of a swirling flow atomizing nozzle provided in an embodiment of the present invention;

FIG. 2 is a schematic view of a spinning disk according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a circulator according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a spiral spray core structure provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of a spring structure provided by an embodiment of the present invention;

wherein: 1-outer sleeve, 2-nozzle, 3-vortex sheet, 4-circulator, 5-spiral spray core, 6-spring, 7-sealing gasket, 8-conduit joint, 9-vortex sheet center hole, 10-vortex sheet diversion groove, 11-circulator center hole and 12-circulator circulation hole.

Detailed Description

Referring to fig. 1-5, the rotational flow atomizing nozzle for helicopter engine washing provided by the present invention mainly comprises: the device comprises a jacket 1, a nozzle 2, a cyclone sheet 3, a circulator 4, a spiral spray core 5, a spring 6, a sealing gasket 7 and a conduit joint 8.

In the embodiment of the application, the pressurized flushing liquid passes through the conduit joint 8 and the spring 6, the flushing liquid at the central part forms an inner side rotational flow under the guiding action of the spiral groove through the spiral spraying core 5 with the spiral groove, and is sprayed out through the central hole 11 of the circulator; the outside washing liquid is guided to the spinning disk 3 through the circulator annular flow hole 12, and then tangentially enters the spinning disk center hole 9 through six spinning disk guide grooves 10 on the spinning disk 3.

An outer side rotational flow is formed in the center hole 9 of the rotational flow sheet, the inner side rotational flow and the outer side rotational flow are mixed and collided in the nozzle 2, after being sprayed out of the nozzle 2, the inner side rotational flow and the outer side rotational flow have violent action with surrounding air to form a good atomization effect, and the flushing area is enlarged under the action of rotational flow centrifugal force. When the helicopter engine rotates in a cold mode, the foggy water flow is uniformly sprayed into the air inlet channel to enable the air inlet channel and the air compressor to be connected, and the washing effect and the washing efficiency of the engine are obviously improved.

In the embodiment of the present application, the spiral spray core 5 has the following characteristics: at least two spiral grooves penetrate from the top to the tail of the spiral spray core 5 and form a flow cavity together with the gradually reduced hole wall of the circulator 4.

In the embodiment of the present application, the spring 6 is characterized by a variable diameter tower-shaped spring, which not only supports the spiral spray core, but also reduces the resistance of the outside washing fluid flowing to the circulator 4 due to the large flow passage area of the gap.

In the present embodiment, the catheter hub 8 features a central flared cone for supporting the spring 6.

In the embodiment of the present application, the features of the spinning disk 3: at least six swirler guide grooves 10 tangent to the swirler central hole 9 are formed.

In the present embodiment, the feature of the circulator 4 is that at least eight annular flow holes 12 are provided for introducing the outer flushing liquid into the swirler 3.

In the present embodiment, the feature of the circulator 4 is that the circulator central hole 11 is a tapered hole, and the inner swirling flow is ejected through the circulator central hole.

In the embodiment of the present application, the nozzle 2 is characterized by a tapered hole at the center for mixing and colliding the inner rotational flow and the outer rotational flow, and spraying from the nozzle 2 to generate a vigorous action with the surrounding air to form an atomization effect.

In this application embodiment, the characteristics of overcoat 8, export are one and expand the conical surface outward, follow 2 spouts whirl atomizing washing liquids of nozzle, and the effect of centrifugal force is outdiffused, and washing liquid forms suitable cone angle under the conical surface guide is expanded outward to overcoat 2, can cover helicopter engine intake duct cross-section just.

In the embodiment of the present application, the gasket 7 is characterized by being made of a material 5860 of nitrile rubber and having a thickness of 2mm.

Claims

1. A swirl atomizer head for helicopter engine washing, comprising:

the outer sleeve is connected with the catheter joint to form a cavity;

the rotational flow atomization component is arranged in the cavity and used for rotationally atomizing flushing liquid to form an inner rotational flow; wherein the swirl atomizing part comprises: the at least two spiral grooves are arranged on the rotational flow atomization component and are used for enabling the flushing liquid to flow through the at least two spiral grooves and form inner rotational flow;

the circulator is arranged between the rotational flow atomizing part and the rotational flow sheet and is used for guiding the flushing liquid into the rotational flow sheet; wherein the circulator is provided with an annular flow hole for the flushing liquid to flow to the spinning disk from the annular flow hole;

the swirl plate is arranged between the nozzle and the circulator and is used for rotating the flushing liquid to form outer swirl; wherein, the spinning disk includes: the flow guide grooves are obliquely arranged on the vortex sheet and are uniformly arranged in a ring shape, and the flushing liquid flows into the vortex sheet along the flow guide grooves to form outer vortex;

and the nozzle is arranged between the spinning disk and the outer sleeve and used for mixing and colliding the inner side spinning flow and the outer side spinning flow and spraying out from the nozzle.

2. The swirl atomizer nozzle of claim 1 wherein said swirler plate central hole is disposed in a middle portion of said swirler plate for said outer swirl to flow out of said swirler plate central hole.

3. The swirl atomizer of claim 2 wherein said channels comprise at least six.

4. The swirl atomizing spray head of claim 1 wherein the at least two helical flutes run through from the top to the tail of the swirl atomizing member.

5. The swirl atomizer of claim 1 wherein said swirl atomizer further comprises:

and the spring is arranged in the cavity and used for supporting the rotational flow atomization component.

6. The swirl atomizer nozzle of claim 1 further comprising:

and the sealing gasket is arranged between the outer sleeve and the conduit joint and used for sealing.