CN212621470U

CN212621470U - Nozzle performance test platform

Info

Publication number: CN212621470U
Application number: CN202021206929.7U
Authority: CN
Inventors: 廖利华; 郭斌
Original assignee: Hunan Hanneng Technology Co ltd
Current assignee: Hunan Hanneng Technology Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-02-26
Anticipated expiration: 2030-06-24

Abstract

The utility model provides a nozzle performance test platform, which comprises a test cabin and an air inducing device, wherein a nozzle bracket and a nozzle are arranged above the test cabin; the nozzle is communicated with a fuel oil circuit and a protective gas source; the bottom of the test chamber is connected with an induced draft device through a pipeline; a fire extinguishing system spray head which is aligned with the test chamber is arranged outside the test chamber; a centrifugal fan structure and an oil mist separator are arranged in the air inducing device; the oil mist separator is of a drawer type structure, and is sequentially provided with a spiral pre-separator, a labyrinth type multiple filter and an HEPA filter along the air duct direction; the nozzle performance test platform provided by the utility model can perform single-nozzle spray cone angle and atomization characteristic tests under the state of not simulating the back pressure of a combustion chamber and a head flow field, and can meet the requirement of ensuring that the nozzle does not ice when performing a low-temperature atomization test; when carrying out high temperature atomization test, can effectively reduce the produced risk of high temperature oil mist being ignited.

Description

Nozzle performance test platform

Technical Field

The utility model relates to an aeroengine tests technical field, concretely relates to nozzle performance test platform.

Background

The atomizing performance of the nozzle of the aircraft engine is greatly related to the performance of the engine, so that the performance of the nozzle needs to be tested for many times in the design and manufacture process so as to improve the structure of the nozzle continuously and obtain the nozzle with the best performance, the performance test of the nozzle comprises multiple tests, namely a spray cone angle test and an atomizing characteristic test, wherein the atomizing characteristic test usually needs to simulate different temperature environments so as to adapt to the requirements of the actual working process, and the problem that how to enable a nozzle performance test platform to take multiple test forms into consideration is needed to be solved.

Disclosure of Invention

To the above-mentioned problem that prior art exists, the utility model provides a nozzle performance test platform.

The utility model discloses specifically adopt following technical scheme:

a nozzle performance test platform comprises a test chamber and an air inducing device, wherein a nozzle aligned with the test chamber and a protective gas source are arranged above the test chamber; the bottom of the test chamber is connected with an induced draft device through a pipeline; a fire extinguishing system is also arranged outside the test chamber; the spray head of the fire extinguishing system is aligned with the test chamber.

Furthermore, a centrifugal fan structure and an oil mist separator are arranged in the air inducing device; the oil mist separator is of a drawer type structure, and a spiral pre-separator, a labyrinth type multi-filter and a HEPA filter are sequentially arranged along the air duct direction.

Furthermore, the test chamber consists of a stainless steel regular hexagon metal frame and full transparent toughened glass.

Furthermore, the material used by the test chamber has the characteristics of high light transmission and oil resistance.

Further, the dew point of the source gas provided by the protective gas source is-30 ℃.

Further, the protective gas source is instrument gas.

Further, the nozzle is suspended and fixed above the test chamber through a nozzle bracket.

Furthermore, the nozzle support is provided with an upper position adjusting structure, a lower position adjusting structure and a circumferential position adjusting mechanism.

Further, the oil mist separator also comprises a collecting cover, a connecting pipe, a flow meter and a liquid collecting chamber.

The nozzle performance test platform provided by the utility model can perform single-nozzle spray cone angle and atomization characteristic tests under the state of not simulating the back pressure of a combustion chamber and a head flow field, and can meet the requirement of ensuring that the nozzle does not ice when performing a low-temperature atomization test; when carrying out high temperature atomization test, can effectively reduce the produced risk of high temperature oil mist being ignited.

Drawings

FIG. 1 is a schematic structural view of a nozzle performance test platform of the present invention;

FIG. 2 is a schematic view of an oil mist separator;

reference numerals: 1. a source of protective gas; 2. a nozzle; 3. a test chamber; 4. waste oil; 5. an air inducing device; 6. a nozzle holder; 7. a fire suppression system.

Detailed Description

The present invention will be further explained with reference to the drawings and examples. In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

As shown in fig. 1, the utility model provides a nozzle performance test platform, which mainly comprises a test chamber 3 and an air inducing device 5, wherein the test chamber comprises a stainless steel regular hexagon metal frame and a full transparent toughened glass, and the material coated inside the test chamber has the characteristics of high light transmission and oil resistance, so as to observe and shoot the nozzle atomization state image during the test; and a nozzle bracket 6 and a nozzle 2 which is arranged in a suspended manner through the nozzle bracket are arranged above the test chamber 3, and the nozzle bracket 6 is provided with an upper and lower position adjusting structure and a circumferential position adjusting mechanism.

The nozzle 2 is communicated with a fuel oil system for supplying oil and is also communicated with a protective gas source 1 which is instrument gas; meanwhile, in the embodiment, a fire extinguishing system 7 aligned with the test chamber 3 is arranged outside the test chamber, and a spray head of the fire extinguishing system 7 is aligned with the test chamber; when the low-temperature atomization test of the nozzle is carried out under the prior art, because the temperature at the nozzle is lower, a large amount of moisture in the air is condensed at the nozzle shell and the nozzle, the atomization performance of the nozzle is seriously affected by the ice slag at the nozzle, and the nozzle needs to be prevented from freezing in order to obtain the accurate atomization performance, so that the nozzle of the utility model is communicated with a protective gas source 1, protective gas is introduced during the low-temperature atomization test, the dew point of the gas source gas selected and used in the embodiment is-30 ℃, and the nozzle can be ensured not to freeze during the low-temperature test; when the high-temperature atomization test is carried out, if a dangerous situation occurs, the fire extinguishing system nozzle aligned to the test chamber can quickly respond and can be timely processed to ensure the safety of the test device and personnel.

The bottom of the test chamber 3 is communicated with an induced draft device 5 through a pipeline and used for sucking excessive oil mist in the test chamber in the test process; the air inducing device 5 mainly comprises a centrifugal fan structure and an oil mist separator, wherein the oil mist separator is of a drawer type structure, and a spiral pre-separator, a labyrinth type multi-filter and an HEPA filter are sequentially arranged along the air duct direction.

The event is based on above-mentioned technical characteristic, the utility model discloses can carry out under conventional environment and not simulate single nozzle spray cone angle and the atomizing characteristic test under combustion chamber backpressure and the head flow field state, concrete working method is as follows: high-pressure fuel oil supplied by a fuel oil system is introduced into the nozzle, the high-pressure fuel oil is sprayed in the transparent test chamber, and probe equipment arranged outside the test chamber can acquire image information of the spray so as to obtain a series of characteristic parameters such as a spray cone angle, a droplet particle size and a speed and judge the performance of the nozzle; meanwhile, according to different test temperatures, the working modes of the test bed are slightly different, when a low-temperature atomization test is carried out, a protective gas source communicated with the test bed provides protective gas with low dew point, freezing of a nozzle shell and a nozzle is avoided, and when a high-temperature atomization test is carried out, a fire extinguishing system arranged on the outer side of the test chamber is in a standby state, is provided with a corresponding temperature sensor, a smoke sensor and the like at the test chamber, can monitor the condition in the test chamber in real time, and can automatically cool and extinguish fire when abnormal conditions occur; in the test process, the air inducing device is used for extracting excessive oil mist in the test cabin in the test process, so that the interference of normal test observation is avoided, and the risk of combustion and explosion possibly caused by overhigh concentration of the oil mist is avoided; the induced draft device is provided with a centrifugal fan structure and a plurality of groups of filters, oil mist is firstly captured by the collecting cover under the action of negative pressure generated by the fan, the rest oil mist enters the main air pipe through an outlet pipe of the collecting cover and then enters the spiral pre-separator of the purifier, the oil mist flows in the separator at a high speed, large particle dust and oil mist liquid drops are separated after colliding with each spiral plate on the pipe wall and fall into the liquid collecting chamber, and the oil mist and the dust with smaller particles are separated; after the residual oil mist containing fine dust is condensed and flows out of the pre-separator, the residual oil mist passes through a second-stage separator (namely a labyrinth type multi-filter), formed liquid drops fall into a liquid collecting chamber under the action of gravity, smaller oil mist passes through an HEPA filter and is completely screened by a net, and then the waste oil 4 is discharged together; the clean air is directly discharged into the air under the action of the negative pressure of the fan, and the filtering efficiency can reach 99.99 percent.

It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. 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. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A nozzle performance test platform is characterized by comprising a test chamber and an air inducing device, wherein a nozzle aligned with the test chamber and a protective gas source are arranged above the test chamber; the bottom of the test chamber is connected with an induced draft device through a pipeline; a fire extinguishing system is also arranged outside the test chamber; the spray head of the fire extinguishing system is aligned with the test chamber.

2. The nozzle performance test platform according to claim 1, wherein a centrifugal fan structure and an oil mist separator are arranged inside the air inducing device; the oil mist separator is of a drawer type structure, and a spiral pre-separator, a labyrinth type multi-filter and a HEPA filter are sequentially arranged along the air duct direction.

3. The nozzle performance testing platform of claim 1, wherein the test chamber is composed of a stainless steel regular hexagonal metal frame and fully transparent tempered glass.

4. The nozzle performance testing platform of claim 3, wherein the material used in the test chamber has high light transmission and oil resistance.

5. The nozzle performance test platform of claim 1, wherein a dew point of a source gas provided by the protective gas source is-30 ℃.

6. The nozzle performance testing platform of claim 4, wherein the protective gas source is a meter gas.

7. The nozzle performance testing platform of claim 1, wherein the nozzle is suspended above the test chamber by a nozzle support.

8. The nozzle performance testing platform of claim 7, wherein the nozzle support is provided with an up-down position adjustment mechanism and a circumferential position adjustment mechanism.

9. The nozzle performance testing platform of claim 2, wherein the oil mist separator further comprises a collection hood, a connecting tube, a flow meter, and a liquid collection chamber.